jdk8-mips64-public/hotspot: src/share/vm/runtime/globals.hpp@2d8a650513c2 (annotated)

src/share/vm/runtime/globals.hpp@2d8a650513c2 (annotated)

src/share/vm/runtime/globals.hpp

Fri, 29 Apr 2016 00:06:10 +0800

author: aoqi
date: Fri, 29 Apr 2016 00:06:10 +0800
changeset 1: 2d8a650513c2
parent 0: f90c822e73f8
child 25: 873fd82b133d
permissions: -rw-r--r--

Added MIPS 64-bit port.

 /*
  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 /*
  * This file has been modified by Loongson Technology in 2015. These
  * modifications are Copyright (c) 2015 Loongson Technology, and are made
  * available on the same license terms set forth above.
  */
 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
 #define SHARE_VM_RUNTIME_GLOBALS_HPP
 #include "utilities/debug.hpp"
 // use this for flags that are true per default in the tiered build
 // but false in non-tiered builds, and vice versa
 #ifdef TIERED
 #define  trueInTiered true
 #define falseInTiered false
 #else
 #define  trueInTiered false
 #define falseInTiered true
 #endif
 #ifdef TARGET_ARCH_x86
 # include "globals_x86.hpp"
 #endif
 #ifdef TARGET_ARCH_sparc
 # include "globals_sparc.hpp"
 #endif
 #ifdef TARGET_ARCH_zero
 # include "globals_zero.hpp"
 #endif
 #ifdef TARGET_ARCH_arm
 # include "globals_arm.hpp"
 #endif
 #ifdef TARGET_ARCH_ppc
 # include "globals_ppc.hpp"
 #endif
 #ifdef TARGET_ARCH_mips
 # include "globals_mips.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_linux
 # include "globals_linux.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_solaris
 # include "globals_solaris.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_windows
 # include "globals_windows.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_aix
 # include "globals_aix.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_bsd
 # include "globals_bsd.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_linux_x86
 # include "globals_linux_x86.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_linux_sparc
 # include "globals_linux_sparc.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_linux_mips
 # include "globals_linux_mips.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_linux_zero
 # include "globals_linux_zero.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_solaris_x86
 # include "globals_solaris_x86.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_solaris_sparc
 # include "globals_solaris_sparc.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_windows_x86
 # include "globals_windows_x86.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_linux_arm
 # include "globals_linux_arm.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_linux_ppc
 # include "globals_linux_ppc.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_aix_ppc
 # include "globals_aix_ppc.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_bsd_x86
 # include "globals_bsd_x86.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_bsd_zero
 # include "globals_bsd_zero.hpp"
 #endif
 #ifdef COMPILER1
 #ifdef TARGET_ARCH_x86
 # include "c1_globals_x86.hpp"
 #endif
 #ifdef TARGET_ARCH_sparc
 # include "c1_globals_sparc.hpp"
 #endif
 #ifdef TARGET_ARCH_mips
 # include "c1_globals_mips.hpp"
 #endif
 #ifdef TARGET_ARCH_arm
 # include "c1_globals_arm.hpp"
 #endif
 #ifdef TARGET_ARCH_ppc
 # include "c1_globals_ppc.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_linux
 # include "c1_globals_linux.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_solaris
 # include "c1_globals_solaris.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_windows
 # include "c1_globals_windows.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_aix
 # include "c1_globals_aix.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_bsd
 # include "c1_globals_bsd.hpp"
 #endif
 #endif
 #ifdef COMPILER2
 #ifdef TARGET_ARCH_x86
 # include "c2_globals_x86.hpp"
 #endif
 #ifdef TARGET_ARCH_sparc
 # include "c2_globals_sparc.hpp"
 #endif
 #ifdef TARGET_ARCH_mips
 # include "c2_globals_mips.hpp"
 #endif
 #ifdef TARGET_ARCH_arm
 # include "c2_globals_arm.hpp"
 #endif
 #ifdef TARGET_ARCH_ppc
 # include "c2_globals_ppc.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_linux
 # include "c2_globals_linux.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_solaris
 # include "c2_globals_solaris.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_windows
 # include "c2_globals_windows.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_aix
 # include "c2_globals_aix.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_bsd
 # include "c2_globals_bsd.hpp"
 #endif
 #endif
 #ifdef SHARK
 #ifdef TARGET_ARCH_zero
 # include "shark_globals_zero.hpp"
 #endif
 #endif
 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
 define_pd_global(bool, BackgroundCompilation,        false);
 define_pd_global(bool, UseTLAB,                      false);
 define_pd_global(bool, CICompileOSR,                 false);
 define_pd_global(bool, UseTypeProfile,               false);
 define_pd_global(bool, UseOnStackReplacement,        false);
 define_pd_global(bool, InlineIntrinsics,             false);
 define_pd_global(bool, PreferInterpreterNativeStubs, true);
 define_pd_global(bool, ProfileInterpreter,           false);
 define_pd_global(bool, ProfileTraps,                 false);
 define_pd_global(bool, TieredCompilation,            false);
 define_pd_global(intx, CompileThreshold,             0);
 define_pd_global(intx, BackEdgeThreshold,            0);
 define_pd_global(intx, OnStackReplacePercentage,     0);
 define_pd_global(bool, ResizeTLAB,                   false);
 define_pd_global(intx, FreqInlineSize,               0);
 define_pd_global(intx, NewSizeThreadIncrease,        4*K);
 define_pd_global(intx, InlineClassNatives,           true);
 define_pd_global(intx, InlineUnsafeOps,              true);
 define_pd_global(intx, InitialCodeCacheSize,         160*K);
 define_pd_global(intx, ReservedCodeCacheSize,        32*M);
 define_pd_global(intx, CodeCacheExpansionSize,       32*K);
 define_pd_global(intx, CodeCacheMinBlockLength,      1);
 define_pd_global(intx, CodeCacheMinimumUseSpace,     200*K);
 define_pd_global(uintx,MetaspaceSize,    ScaleForWordSize(4*M));
 define_pd_global(bool, NeverActAsServerClassMachine, true);
 define_pd_global(uint64_t,MaxRAM,                    1ULL*G);
 #define CI_COMPILER_COUNT 0
 #else
 #ifdef COMPILER2
 #define CI_COMPILER_COUNT 2
 #else
 #define CI_COMPILER_COUNT 1
 #endif // COMPILER2
 #endif // no compilers
 // string type aliases used only in this file
 typedef const char* ccstr;
 typedef const char* ccstrlist;   // represents string arguments which accumulate
 struct Flag {
   enum Flags {
     // value origin
     DEFAULT          = 0,
     COMMAND_LINE     = 1,
     ENVIRON_VAR      = 2,
     CONFIG_FILE      = 3,
     MANAGEMENT       = 4,
     ERGONOMIC        = 5,
     ATTACH_ON_DEMAND = 6,
     INTERNAL         = 7,
     LAST_VALUE_ORIGIN = INTERNAL,
     VALUE_ORIGIN_BITS = 4,
     VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
     // flag kind
     KIND_PRODUCT            = 1 << 4,
     KIND_MANAGEABLE         = 1 << 5,
     KIND_DIAGNOSTIC         = 1 << 6,
     KIND_EXPERIMENTAL       = 1 << 7,
     KIND_NOT_PRODUCT        = 1 << 8,
     KIND_DEVELOP            = 1 << 9,
     KIND_PLATFORM_DEPENDENT = 1 << 10,
     KIND_READ_WRITE         = 1 << 11,
     KIND_C1                 = 1 << 12,
     KIND_C2                 = 1 << 13,
     KIND_ARCH               = 1 << 14,
     KIND_SHARK              = 1 << 15,
     KIND_LP64_PRODUCT       = 1 << 16,
     KIND_COMMERCIAL         = 1 << 17,
     KIND_MASK = ~VALUE_ORIGIN_MASK
   };
   const char* _type;
   const char* _name;
   void* _addr;
   NOT_PRODUCT(const char* _doc;)
   Flags _flags;
   // points to all Flags static array
   static Flag* flags;
   // number of flags
   static size_t numFlags;
   static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false);
   static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
   void check_writable();
   bool is_bool() const;
   bool get_bool() const;
   void set_bool(bool value);
   bool is_intx() const;
   intx get_intx() const;
   void set_intx(intx value);
   bool is_uintx() const;
   uintx get_uintx() const;
   void set_uintx(uintx value);
   bool is_uint64_t() const;
   uint64_t get_uint64_t() const;
   void set_uint64_t(uint64_t value);
   bool is_double() const;
   double get_double() const;
   void set_double(double value);
   bool is_ccstr() const;
   bool ccstr_accumulates() const;
   ccstr get_ccstr() const;
   void set_ccstr(ccstr value);
   Flags get_origin();
   void set_origin(Flags origin);
   bool is_default();
   bool is_ergonomic();
   bool is_command_line();
   bool is_product() const;
   bool is_manageable() const;
   bool is_diagnostic() const;
   bool is_experimental() const;
   bool is_notproduct() const;
   bool is_develop() const;
   bool is_read_write() const;
   bool is_commercial() const;
   bool is_constant_in_binary() const;
   bool is_unlocker() const;
   bool is_unlocked() const;
   bool is_writeable() const;
   bool is_external() const;
   bool is_unlocker_ext() const;
   bool is_unlocked_ext() const;
   bool is_writeable_ext() const;
   bool is_external_ext() const;
   void get_locked_message(char*, int) const;
   void get_locked_message_ext(char*, int) const;
   void print_on(outputStream* st, bool withComments = false );
   void print_kind(outputStream* st);
   void print_as_flag(outputStream* st);
 };
 // debug flags control various aspects of the VM and are global accessible
 // use FlagSetting to temporarily change some debug flag
 // e.g. FlagSetting fs(DebugThisAndThat, true);
 // restored to previous value upon leaving scope
 class FlagSetting {
   bool val;
   bool* flag;
  public:
   FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
   ~FlagSetting()                       { *flag = val; }
 };
 class CounterSetting {
   intx* counter;
  public:
   CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
   ~CounterSetting()         { (*counter)--; }
 };
 class UIntFlagSetting {
   uintx val;
   uintx* flag;
  public:
   UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
   ~UIntFlagSetting()                         { *flag = val; }
 };
 class DoubleFlagSetting {
   double val;
   double* flag;
  public:
   DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
   ~DoubleFlagSetting()                           { *flag = val; }
 };
 class CommandLineFlags {
  public:
   static bool boolAt(char* name, size_t len, bool* value);
   static bool boolAt(char* name, bool* value)      { return boolAt(name, strlen(name), value); }
   static bool boolAtPut(char* name, size_t len, bool* value, Flag::Flags origin);
   static bool boolAtPut(char* name, bool* value, Flag::Flags origin)   { return boolAtPut(name, strlen(name), value, origin); }
   static bool intxAt(char* name, size_t len, intx* value);
   static bool intxAt(char* name, intx* value)      { return intxAt(name, strlen(name), value); }
   static bool intxAtPut(char* name, size_t len, intx* value, Flag::Flags origin);
   static bool intxAtPut(char* name, intx* value, Flag::Flags origin)   { return intxAtPut(name, strlen(name), value, origin); }
   static bool uintxAt(char* name, size_t len, uintx* value);
   static bool uintxAt(char* name, uintx* value)    { return uintxAt(name, strlen(name), value); }
   static bool uintxAtPut(char* name, size_t len, uintx* value, Flag::Flags origin);
   static bool uintxAtPut(char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
   static bool uint64_tAt(char* name, size_t len, uint64_t* value);
   static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
   static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, Flag::Flags origin);
   static bool uint64_tAtPut(char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
   static bool doubleAt(char* name, size_t len, double* value);
   static bool doubleAt(char* name, double* value)    { return doubleAt(name, strlen(name), value); }
   static bool doubleAtPut(char* name, size_t len, double* value, Flag::Flags origin);
   static bool doubleAtPut(char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
   static bool ccstrAt(char* name, size_t len, ccstr* value);
   static bool ccstrAt(char* name, ccstr* value)    { return ccstrAt(name, strlen(name), value); }
   static bool ccstrAtPut(char* name, size_t len, ccstr* value, Flag::Flags origin);
   static bool ccstrAtPut(char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
   // Returns false if name is not a command line flag.
   static bool wasSetOnCmdline(const char* name, bool* value);
   static void printSetFlags(outputStream* out);
   static void printFlags(outputStream* out, bool withComments);
   static void verify() PRODUCT_RETURN;
 };
 // use this for flags that are true by default in the debug version but
 // false in the optimized version, and vice versa
 #ifdef ASSERT
 #define trueInDebug  true
 #define falseInDebug false
 #else
 #define trueInDebug  false
 #define falseInDebug true
 #endif
 // use this for flags that are true per default in the product build
 // but false in development builds, and vice versa
 #ifdef PRODUCT
 #define trueInProduct  true
 #define falseInProduct false
 #else
 #define trueInProduct  false
 #define falseInProduct true
 #endif
 #ifdef JAVASE_EMBEDDED
 #define falseInEmbedded false
 #else
 #define falseInEmbedded true
 #endif
 // develop flags are settable / visible only during development and are constant in the PRODUCT version
 // product flags are always settable / visible
 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
 // A flag must be declared with one of the following types:
 // bool, intx, uintx, ccstr.
 // The type "ccstr" is an alias for "const char*" and is used
 // only in this file, because the macrology requires single-token type names.
 // Note: Diagnostic options not meant for VM tuning or for product modes.
 // They are to be used for VM quality assurance or field diagnosis
 // of VM bugs.  They are hidden so that users will not be encouraged to
 // try them as if they were VM ordinary execution options.  However, they
 // are available in the product version of the VM.  Under instruction
 // from support engineers, VM customers can turn them on to collect
 // diagnostic information about VM problems.  To use a VM diagnostic
 // option, you must first specify +UnlockDiagnosticVMOptions.
 // (This master switch also affects the behavior of -Xprintflags.)
 //
 // experimental flags are in support of features that are not
 //    part of the officially supported product, but are available
 //    for experimenting with. They could, for example, be performance
 //    features that may not have undergone full or rigorous QA, but which may
 //    help performance in some cases and released for experimentation
 //    by the community of users and developers. This flag also allows one to
 //    be able to build a fully supported product that nonetheless also
 //    ships with some unsupported, lightly tested, experimental features.
 //    Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
 //    UnlockExperimentalVMOptions flag, which allows the control and
 //    modification of the experimental flags.
 //
 // Nota bene: neither diagnostic nor experimental options should be used casually,
 //    and they are not supported on production loads, except under explicit
 //    direction from support engineers.
 //
 // manageable flags are writeable external product flags.
 //    They are dynamically writeable through the JDK management interface
 //    (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
 //    These flags are external exported interface (see CCC).  The list of
 //    manageable flags can be queried programmatically through the management
 //    interface.
 //
 //    A flag can be made as "manageable" only if
 //    - the flag is defined in a CCC as an external exported interface.
 //    - the VM implementation supports dynamic setting of the flag.
 //      This implies that the VM must *always* query the flag variable
 //      and not reuse state related to the flag state at any given time.
 //    - you want the flag to be queried programmatically by the customers.
 //
 // product_rw flags are writeable internal product flags.
 //    They are like "manageable" flags but for internal/private use.
 //    The list of product_rw flags are internal/private flags which
 //    may be changed/removed in a future release.  It can be set
 //    through the management interface to get/set value
 //    when the name of flag is supplied.
 //
 //    A flag can be made as "product_rw" only if
 //    - the VM implementation supports dynamic setting of the flag.
 //      This implies that the VM must *always* query the flag variable
 //      and not reuse state related to the flag state at any given time.
 //
 // Note that when there is a need to support develop flags to be writeable,
 // it can be done in the same way as product_rw.
 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
                                                                             \
   lp64_product(bool, UseCompressedOops, false,                              \
           "Use 32-bit object references in 64-bit VM. "                     \
           "lp64_product means flag is always constant in 32 bit VM")        \
                                                                             \
   lp64_product(bool, UseCompressedClassPointers, false,                     \
           "Use 32-bit class pointers in 64-bit VM. "                        \
           "lp64_product means flag is always constant in 32 bit VM")        \
                                                                             \
   notproduct(bool, CheckCompressedOops, true,                               \
           "Generate checks in encoding/decoding code in debug VM")          \
                                                                             \
   product_pd(uintx, HeapBaseMinAddress,                                     \
           "OS specific low limit for heap base address")                    \
                                                                             \
   diagnostic(bool, PrintCompressedOopsMode, false,                          \
           "Print compressed oops base address and encoding mode")           \
                                                                             \
   lp64_product(intx, ObjectAlignmentInBytes, 8,                             \
           "Default object alignment in bytes, 8 is minimum")                \
                                                                             \
   product(bool, AssumeMP, false,                                            \
           "Instruct the VM to assume multiple processors are available")    \
                                                                             \
   /* UseMembar is theoretically a temp flag used for memory barrier         \
    * removal testing.  It was supposed to be removed before FCS but has     \
    * been re-added (see 6401008) */                                         \
   product_pd(bool, UseMembar,                                               \
           "(Unstable) Issues membars on thread state transitions")          \
                                                                             \
   develop(bool, CleanChunkPoolAsync, falseInEmbedded,                       \
           "Clean the chunk pool asynchronously")                            \
                                                                             \
   /* Temporary: See 6948537 */                                              \
   experimental(bool, UseMemSetInBOT, true,                                  \
           "(Unstable) uses memset in BOT updates in GC code")               \
                                                                             \
   diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug,                  \
           "Enable normal processing of flags relating to field diagnostics")\
                                                                             \
   experimental(bool, UnlockExperimentalVMOptions, false,                    \
           "Enable normal processing of flags relating to experimental "     \
           "features")                                                       \
                                                                             \
   product(bool, JavaMonitorsInStackTrace, true,                             \
           "Print information about Java monitor locks when the stacks are"  \
           "dumped")                                                         \
                                                                             \
   product_pd(bool, UseLargePages,                                           \
           "Use large page memory")                                          \
                                                                             \
   product_pd(bool, UseLargePagesIndividualAllocation,                       \
           "Allocate large pages individually for better affinity")          \
                                                                             \
   develop(bool, LargePagesIndividualAllocationInjectError, false,           \
           "Fail large pages individual allocation")                         \
                                                                             \
   product(bool, UseLargePagesInMetaspace, false,                            \
           "Use large page memory in metaspace. "                            \
           "Only used if UseLargePages is enabled.")                         \
                                                                             \
   develop(bool, TracePageSizes, false,                                      \
           "Trace page size selection and usage")                            \
                                                                             \
   /* 2013/12/18 Jin: disable UseNUMA until OS is fixed*/                    \
   product(bool, UseNUMA, MIPS64_ONLY(false) NOT_MIPS64(false),              \
           "Use NUMA if available")                                          \
                                                                             \
   product(bool, UseOldNUMA, MIPS64_ONLY(true) NOT_MIPS64(false),            \
           "Use Old NUMA if available")                                      \
                                                                             \
   product(bool, UseNUMAThreadRoots, MIPS64_ONLY(true) NOT_MIPS64(false),    \
           "Use NUMAThreadRoots if available")                               \
                                                                             \
   product(bool, UseNUMASteal, MIPS64_ONLY(true) NOT_MIPS64(false),          \
           "Use NUMASteal if available")                                     \
                                                                             \
   product(bool, UseNUMAGC, MIPS64_ONLY(true) NOT_MIPS64(false),             \
           "Use NUMAGC if available")                                        \
                                                                             \
   product(bool, UseStasticScavenge, false,                                  \
           "Use StasticScavenge if available")                               \
                                                                             \
   product(bool, UseStasticCopy, false,                                      \
           "Use StasticCopy if available")                                   \
                                                                             \
   product(bool, UseNUMAInterleaving, false,                                 \
           "Interleave memory across NUMA nodes if available")               \
                                                                             \
   product(uintx, NUMAInterleaveGranularity, 2*M,                            \
           "Granularity to use for NUMA interleaving on Windows OS")         \
                                                                             \
   product(bool, ForceNUMA, false,                                           \
           "Force NUMA optimizations on single-node/UMA systems")            \
                                                                             \
   product(uintx, NUMAChunkResizeWeight, 20,                                 \
           "Percentage (0-100) used to weigh the current sample when "       \
           "computing exponentially decaying average for "                   \
           "AdaptiveNUMAChunkSizing")                                        \
                                                                             \
   product(uintx, NUMASpaceResizeRate, 1*G,                                  \
           "Do not reallocate more than this amount per collection")         \
                                                                             \
   product(bool, UseAdaptiveNUMAChunkSizing, true,                           \
           "Enable adaptive chunk sizing for NUMA")                          \
                                                                             \
   product(bool, NUMAStats, false,                                           \
           "Print NUMA stats in detailed heap information")                  \
                                                                             \
   product(uintx, NUMAPageScanRate, 256,                                     \
           "Maximum number of pages to include in the page scan procedure")  \
                                                                             \
   product_pd(bool, NeedsDeoptSuspend,                                       \
           "True for register window machines (sparc/ia64)")                 \
                                                                             \
   product(intx, UseSSE, 99,                                                 \
           "Highest supported SSE instructions set on x86/x64")              \
                                                                             \
   product(bool, UseAES, false,                                              \
           "Control whether AES instructions can be used on x86/x64")        \
                                                                             \
   product(uintx, LargePageSizeInBytes, 0,                                   \
           "Large page size (0 to let VM choose the page size)")             \
                                                                             \
   product(uintx, LargePageHeapSizeThreshold, 128*M,                         \
           "Use large pages if maximum heap is at least this big")           \
                                                                             \
   product(bool, ForceTimeHighResolution, false,                             \
           "Using high time resolution (for Win32 only)")                    \
                                                                             \
   develop(bool, TraceItables, false,                                        \
           "Trace initialization and use of itables")                        \
                                                                             \
   develop(bool, TracePcPatching, false,                                     \
           "Trace usage of frame::patch_pc")                                 \
                                                                             \
   develop(bool, TraceJumps, false,                                          \
           "Trace assembly jumps in thread ring buffer")                     \
                                                                             \
   develop(bool, TraceRelocator, false,                                      \
           "Trace the bytecode relocator")                                   \
                                                                             \
   develop(bool, TraceLongCompiles, false,                                   \
           "Print out every time compilation is longer than "                \
           "a given threshold")                                              \
                                                                             \
   develop(bool, SafepointALot, false,                                       \
           "Generate a lot of safepoints. This works with "                  \
           "GuaranteedSafepointInterval")                                    \
                                                                             \
   product_pd(bool, BackgroundCompilation,                                   \
           "A thread requesting compilation is not blocked during "          \
           "compilation")                                                    \
                                                                             \
   product(bool, PrintVMQWaitTime, false,                                    \
           "Print out the waiting time in VM operation queue")               \
                                                                             \
   develop(bool, NoYieldsInMicrolock, false,                                 \
           "Disable yields in microlock")                                    \
                                                                             \
   develop(bool, TraceOopMapGeneration, false,                               \
           "Show OopMapGeneration")                                          \
                                                                             \
   product(bool, MethodFlushing, true,                                       \
           "Reclamation of zombie and not-entrant methods")                  \
                                                                             \
   develop(bool, VerifyStack, false,                                         \
           "Verify stack of each thread when it is entering a runtime call") \
                                                                             \
   diagnostic(bool, ForceUnreachable, false,                                 \
           "Make all non code cache addresses to be unreachable by "         \
           "forcing use of 64bit literal fixups")                            \
                                                                             \
   notproduct(bool, StressDerivedPointers, false,                            \
           "Force scavenge when a derived pointer is detected on stack "     \
           "after rtm call")                                                 \
                                                                             \
   develop(bool, TraceDerivedPointers, false,                                \
           "Trace traversal of derived pointers on stack")                   \
                                                                             \
   notproduct(bool, TraceCodeBlobStacks, false,                              \
           "Trace stack-walk of codeblobs")                                  \
                                                                             \
   product(bool, PrintJNIResolving, false,                                   \
           "Used to implement -v:jni")                                       \
                                                                             \
   notproduct(bool, PrintRewrites, false,                                    \
           "Print methods that are being rewritten")                         \
                                                                             \
   product(bool, UseInlineCaches, true,                                      \
           "Use Inline Caches for virtual calls ")                           \
                                                                             \
   develop(bool, InlineArrayCopy, true,                                      \
           "Inline arraycopy native that is known to be part of "            \
           "base library DLL")                                               \
                                                                             \
   develop(bool, InlineObjectHash, true,                                     \
           "Inline Object::hashCode() native that is known to be part "      \
           "of base library DLL")                                            \
                                                                             \
   develop(bool, InlineNatives, true,                                        \
           "Inline natives that are known to be part of base library DLL")   \
                                                                             \
   develop(bool, InlineMathNatives, true,                                    \
           "Inline SinD, CosD, etc.")                                        \
                                                                             \
   develop(bool, InlineClassNatives, true,                                   \
           "Inline Class.isInstance, etc")                                   \
                                                                             \
   develop(bool, InlineThreadNatives, true,                                  \
           "Inline Thread.currentThread, etc")                               \
                                                                             \
   develop(bool, InlineUnsafeOps, true,                                      \
           "Inline memory ops (native methods) from sun.misc.Unsafe")        \
                                                                             \
   product(bool, CriticalJNINatives, true,                                   \
           "Check for critical JNI entry points")                            \
                                                                             \
   notproduct(bool, StressCriticalJNINatives, false,                         \
           "Exercise register saving code in critical natives")              \
                                                                             \
   product(bool, UseSSE42Intrinsics, false,                                  \
           "SSE4.2 versions of intrinsics")                                  \
                                                                             \
   product(bool, UseAESIntrinsics, false,                                    \
           "Use intrinsics for AES versions of crypto")                      \
                                                                             \
   product(bool, UseCRC32Intrinsics, false,                                  \
           "use intrinsics for java.util.zip.CRC32")                         \
                                                                             \
   develop(bool, TraceCallFixup, false,                                      \
           "Trace all call fixups")                                          \
                                                                             \
   develop(bool, DeoptimizeALot, false,                                      \
           "Deoptimize at every exit from the runtime system")               \
                                                                             \
   notproduct(ccstrlist, DeoptimizeOnlyAt, "",                               \
           "A comma separated list of bcis to deoptimize at")                \
                                                                             \
   product(bool, DeoptimizeRandom, false,                                    \
           "Deoptimize random frames on random exit from the runtime system")\
                                                                             \
   notproduct(bool, ZombieALot, false,                                       \
           "Create zombies (non-entrant) at exit from the runtime system")   \
                                                                             \
   product(bool, UnlinkSymbolsALot, false,                                   \
           "Unlink unreferenced symbols from the symbol table at safepoints")\
                                                                             \
   notproduct(bool, WalkStackALot, false,                                    \
           "Trace stack (no print) at every exit from the runtime system")   \
                                                                             \
   product(bool, Debugging, false,                                           \
           "Set when executing debug methods in debug.cpp "                  \
           "(to prevent triggering assertions)")                             \
                                                                             \
   notproduct(bool, StrictSafepointChecks, trueInDebug,                      \
           "Enable strict checks that safepoints cannot happen for threads " \
           "that use No_Safepoint_Verifier")                                 \
                                                                             \
   notproduct(bool, VerifyLastFrame, false,                                  \
           "Verify oops on last frame on entry to VM")                       \
                                                                             \
   develop(bool, TraceHandleAllocation, false,                               \
           "Print out warnings when suspiciously many handles are allocated")\
                                                                             \
   product(bool, UseCompilerSafepoints, true,                                \
           "Stop at safepoints in compiled code")                            \
                                                                             \
   product(bool, FailOverToOldVerifier, true,                                \
           "Fail over to old verifier when split verifier fails")            \
                                                                             \
   develop(bool, ShowSafepointMsgs, false,                                   \
           "Show message about safepoint synchronization")                   \
                                                                             \
   product(bool, SafepointTimeout, false,                                    \
           "Time out and warn or fail after SafepointTimeoutDelay "          \
           "milliseconds if failed to reach safepoint")                      \
                                                                             \
   develop(bool, DieOnSafepointTimeout, false,                               \
           "Die upon failure to reach safepoint (see SafepointTimeout)")     \
                                                                             \
   /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */      \
   /* typically, at most a few retries are needed */                         \
   product(intx, SuspendRetryCount, 50,                                      \
           "Maximum retry count for an external suspend request")            \
                                                                             \
   product(intx, SuspendRetryDelay, 5,                                       \
           "Milliseconds to delay per retry (* current_retry_count)")        \
                                                                             \
   product(bool, AssertOnSuspendWaitFailure, false,                          \
           "Assert/Guarantee on external suspend wait failure")              \
                                                                             \
   product(bool, TraceSuspendWaitFailures, false,                            \
           "Trace external suspend wait failures")                           \
                                                                             \
   product(bool, MaxFDLimit, true,                                           \
           "Bump the number of file descriptors to maximum in Solaris")      \
                                                                             \
   diagnostic(bool, LogEvents, true,                                         \
           "Enable the various ring buffer event logs")                      \
                                                                             \
   diagnostic(uintx, LogEventsBufferEntries, 10,                             \
           "Number of ring buffer event logs")                               \
                                                                             \
   product(bool, BytecodeVerificationRemote, true,                           \
           "Enable the Java bytecode verifier for remote classes")           \
                                                                             \
   product(bool, BytecodeVerificationLocal, false,                           \
           "Enable the Java bytecode verifier for local classes")            \
                                                                             \
   develop(bool, ForceFloatExceptions, trueInDebug,                          \
           "Force exceptions on FP stack under/overflow")                    \
                                                                             \
   develop(bool, VerifyStackAtCalls, false,                                  \
           "Verify that the stack pointer is unchanged after calls")         \
                                                                             \
   develop(bool, TraceJavaAssertions, false,                                 \
           "Trace java language assertions")                                 \
                                                                             \
   notproduct(bool, CheckAssertionStatusDirectives, false,                   \
           "Temporary - see javaClasses.cpp")                                \
                                                                             \
   notproduct(bool, PrintMallocFree, false,                                  \
           "Trace calls to C heap malloc/free allocation")                   \
                                                                             \
   product(bool, PrintOopAddress, false,                                     \
           "Always print the location of the oop")                           \
                                                                             \
   notproduct(bool, VerifyCodeCacheOften, false,                             \
           "Verify compiled-code cache often")                               \
                                                                             \
   develop(bool, ZapDeadCompiledLocals, false,                               \
           "Zap dead locals in compiler frames")                             \
                                                                             \
   notproduct(bool, ZapDeadLocalsOld, false,                                 \
           "Zap dead locals (old version, zaps all frames when "             \
           "entering the VM")                                                \
                                                                             \
   notproduct(bool, CheckOopishValues, false,                                \
           "Warn if value contains oop (requires ZapDeadLocals)")            \
                                                                             \
   develop(bool, UseMallocOnly, false,                                       \
           "Use only malloc/free for allocation (no resource area/arena)")   \
                                                                             \
   develop(bool, PrintMalloc, false,                                         \
           "Print all malloc/free calls")                                    \
                                                                             \
   develop(bool, PrintMallocStatistics, false,                               \
           "Print malloc/free statistics")                                   \
                                                                             \
   develop(bool, ZapResourceArea, trueInDebug,                               \
           "Zap freed resource/arena space with 0xABABABAB")                 \
                                                                             \
   notproduct(bool, ZapVMHandleArea, trueInDebug,                            \
           "Zap freed VM handle space with 0xBCBCBCBC")                      \
                                                                             \
   develop(bool, ZapJNIHandleArea, trueInDebug,                              \
           "Zap freed JNI handle space with 0xFEFEFEFE")                     \
                                                                             \
   notproduct(bool, ZapStackSegments, trueInDebug,                           \
           "Zap allocated/freed stack segments with 0xFADFADED")             \
                                                                             \
   develop(bool, ZapUnusedHeapArea, trueInDebug,                             \
           "Zap unused heap space with 0xBAADBABE")                          \
                                                                             \
   develop(bool, TraceZapUnusedHeapArea, false,                              \
           "Trace zapping of unused heap space")                             \
                                                                             \
   develop(bool, CheckZapUnusedHeapArea, false,                              \
           "Check zapping of unused heap space")                             \
                                                                             \
   develop(bool, ZapFillerObjects, trueInDebug,                              \
           "Zap filler objects with 0xDEAFBABE")                             \
                                                                             \
   develop(bool, PrintVMMessages, true,                                      \
           "Print VM messages on console")                                   \
                                                                             \
   product(bool, PrintGCApplicationConcurrentTime, false,                    \
           "Print the time the application has been running")                \
                                                                             \
   product(bool, PrintGCApplicationStoppedTime, false,                       \
           "Print the time the application has been stopped")                \
                                                                             \
   diagnostic(bool, VerboseVerification, false,                              \
           "Display detailed verification details")                          \
                                                                             \
   notproduct(uintx, ErrorHandlerTest, 0,                                    \
           "If > 0, provokes an error after VM initialization; the value "   \
           "determines which error to provoke. See test_error_handler() "    \
           "in debug.cpp.")                                                  \
                                                                             \
   develop(bool, Verbose, false,                                             \
           "Print additional debugging information from other modes")        \
                                                                             \
   develop(bool, PrintMiscellaneous, false,                                  \
           "Print uncategorized debugging information (requires +Verbose)")  \
                                                                             \
   develop(bool, WizardMode, false,                                          \
           "Print much more debugging information")                          \
                                                                             \
   product(bool, ShowMessageBoxOnError, false,                               \
           "Keep process alive on VM fatal error")                           \
                                                                             \
   product(bool, CreateMinidumpOnCrash, false,                               \
           "Create minidump on VM fatal error")                              \
                                                                             \
   product_pd(bool, UseOSErrorReporting,                                     \
           "Let VM fatal error propagate to the OS (ie. WER on Windows)")    \
                                                                             \
   product(bool, SuppressFatalErrorMessage, false,                           \
           "Report NO fatal error message (avoid deadlock)")                 \
                                                                             \
   product(ccstrlist, OnError, "",                                           \
           "Run user-defined commands on fatal error; see VMError.cpp "      \
           "for examples")                                                   \
                                                                             \
   product(ccstrlist, OnOutOfMemoryError, "",                                \
           "Run user-defined commands on first java.lang.OutOfMemoryError")  \
                                                                             \
   manageable(bool, HeapDumpBeforeFullGC, false,                             \
           "Dump heap to file before any major stop-the-world GC")           \
                                                                             \
   manageable(bool, HeapDumpAfterFullGC, false,                              \
           "Dump heap to file after any major stop-the-world GC")            \
                                                                             \
   manageable(bool, HeapDumpOnOutOfMemoryError, false,                       \
           "Dump heap to file when java.lang.OutOfMemoryError is thrown")    \
                                                                             \
   manageable(ccstr, HeapDumpPath, NULL,                                     \
           "When HeapDumpOnOutOfMemoryError is on, the path (filename or "   \
           "directory) of the dump file (defaults to java_pid<pid>.hprof "   \
           "in the working directory)")                                      \
                                                                             \
   develop(uintx, SegmentedHeapDumpThreshold, 2*G,                           \
           "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) "     \
           "when the heap usage is larger than this")                        \
                                                                             \
   develop(uintx, HeapDumpSegmentSize, 1*G,                                  \
           "Approximate segment size when generating a segmented heap dump") \
                                                                             \
   develop(bool, BreakAtWarning, false,                                      \
           "Execute breakpoint upon encountering VM warning")                \
                                                                             \
   develop(bool, TraceVMOperation, false,                                    \
           "Trace VM operations")                                            \
                                                                             \
   develop(bool, UseFakeTimers, false,                                       \
           "Tell whether the VM should use system time or a fake timer")     \
                                                                             \
   product(ccstr, NativeMemoryTracking, "off",                               \
           "Native memory tracking options")                                 \
                                                                             \
   diagnostic(bool, PrintNMTStatistics, false,                               \
           "Print native memory tracking summary data if it is on")          \
                                                                             \
   diagnostic(bool, AutoShutdownNMT, true,                                   \
           "Automatically shutdown native memory tracking under stress "     \
           "situations. When set to false, native memory tracking tries to " \
           "stay alive at the expense of JVM performance")                   \
                                                                             \
   diagnostic(bool, LogCompilation, false,                                   \
           "Log compilation activity in detail to LogFile")                  \
                                                                             \
   product(bool, PrintCompilation, false,                                    \
           "Print compilations")                                             \
                                                                             \
   diagnostic(bool, TraceNMethodInstalls, false,                             \
           "Trace nmethod installation")                                     \
                                                                             \
   diagnostic(intx, ScavengeRootsInCode, 2,                                  \
           "0: do not allow scavengable oops in the code cache; "            \
           "1: allow scavenging from the code cache; "                       \
           "2: emit as many constants as the compiler can see")              \
                                                                             \
   product(bool, AlwaysRestoreFPU, false,                                    \
           "Restore the FPU control word after every JNI call (expensive)")  \
                                                                             \
   diagnostic(bool, PrintCompilation2, false,                                \
           "Print additional statistics per compilation")                    \
                                                                             \
   diagnostic(bool, PrintAdapterHandlers, false,                             \
           "Print code generated for i2c/c2i adapters")                      \
                                                                             \
   diagnostic(bool, VerifyAdapterCalls, trueInDebug,                         \
           "Verify that i2c/c2i adapters are called properly")               \
                                                                             \
   develop(bool, VerifyAdapterSharing, false,                                \
           "Verify that the code for shared adapters is the equivalent")     \
                                                                             \
   diagnostic(bool, PrintAssembly, false,                                    \
           "Print assembly code (using external disassembler.so)")           \
                                                                             \
   diagnostic(ccstr, PrintAssemblyOptions, NULL,                             \
           "Print options string passed to disassembler.so")                 \
                                                                             \
   diagnostic(bool, PrintNMethods, false,                                    \
           "Print assembly code for nmethods when generated")                \
                                                                             \
   diagnostic(bool, PrintNativeNMethods, false,                              \
           "Print assembly code for native nmethods when generated")         \
                                                                             \
   develop(bool, PrintDebugInfo, false,                                      \
           "Print debug information for all nmethods when generated")        \
                                                                             \
   develop(bool, PrintRelocations, false,                                    \
           "Print relocation information for all nmethods when generated")   \
                                                                             \
   develop(bool, PrintDependencies, false,                                   \
           "Print dependency information for all nmethods when generated")   \
                                                                             \
   develop(bool, PrintExceptionHandlers, false,                              \
           "Print exception handler tables for all nmethods when generated") \
                                                                             \
   develop(bool, StressCompiledExceptionHandlers, false,                     \
           "Exercise compiled exception handlers")                           \
                                                                             \
   develop(bool, InterceptOSException, false,                                \
           "Start debugger when an implicit OS (e.g. NULL) "                 \
           "exception happens")                                              \
                                                                             \
   product(bool, PrintCodeCache, false,                                      \
           "Print the code cache memory usage when exiting")                 \
                                                                             \
   develop(bool, PrintCodeCache2, false,                                     \
           "Print detailed usage information on the code cache when exiting")\
                                                                             \
   product(bool, PrintCodeCacheOnCompilation, false,                         \
           "Print the code cache memory usage each time a method is "        \
           "compiled")                                                       \
                                                                             \
   diagnostic(bool, PrintStubCode, false,                                    \
           "Print generated stub code")                                      \
                                                                             \
   product(bool, StackTraceInThrowable, true,                                \
           "Collect backtrace in throwable when exception happens")          \
                                                                             \
   product(bool, OmitStackTraceInFastThrow, true,                            \
           "Omit backtraces for some 'hot' exceptions in optimized code")    \
                                                                             \
   product(bool, ProfilerPrintByteCodeStatistics, false,                     \
           "Print bytecode statistics when dumping profiler output")         \
                                                                             \
   product(bool, ProfilerRecordPC, false,                                    \
           "Collect ticks for each 16 byte interval of compiled code")       \
                                                                             \
   product(bool, ProfileVM, false,                                           \
           "Profile ticks that fall within VM (either in the VM Thread "     \
           "or VM code called through stubs)")                               \
                                                                             \
   product(bool, ProfileIntervals, false,                                    \
           "Print profiles for each interval (see ProfileIntervalsTicks)")   \
                                                                             \
   notproduct(bool, ProfilerCheckIntervals, false,                           \
           "Collect and print information on spacing of profiler ticks")     \
                                                                             \
   develop(bool, PrintJVMWarnings, false,                                    \
           "Print warnings for unimplemented JVM functions")                 \
                                                                             \
   product(bool, PrintWarnings, true,                                        \
           "Print JVM warnings to output stream")                            \
                                                                             \
   notproduct(uintx, WarnOnStalledSpinLock, 0,                               \
           "Print warnings for stalled SpinLocks")                           \
                                                                             \
   product(bool, RegisterFinalizersAtInit, true,                             \
           "Register finalizable objects at end of Object.<init> or "        \
           "after allocation")                                               \
                                                                             \
   develop(bool, RegisterReferences, true,                                   \
           "Tell whether the VM should register soft/weak/final/phantom "    \
           "references")                                                     \
                                                                             \
   develop(bool, IgnoreRewrites, false,                                      \
           "Suppress rewrites of bytecodes in the oopmap generator. "        \
           "This is unsafe!")                                                \
                                                                             \
   develop(bool, PrintCodeCacheExtension, false,                             \
           "Print extension of code cache")                                  \
                                                                             \
   develop(bool, UsePrivilegedStack, true,                                   \
           "Enable the security JVM functions")                              \
                                                                             \
   develop(bool, ProtectionDomainVerification, true,                         \
           "Verify protection domain before resolution in system dictionary")\
                                                                             \
   product(bool, ClassUnloading, true,                                       \
           "Do unloading of classes")                                        \
                                                                             \
   develop(bool, DisableStartThread, false,                                  \
           "Disable starting of additional Java threads "                    \
           "(for debugging only)")                                           \
                                                                             \
   develop(bool, MemProfiling, false,                                        \
           "Write memory usage profiling to log file")                       \
                                                                             \
   notproduct(bool, PrintSystemDictionaryAtExit, false,                      \
           "Print the system dictionary at exit")                            \
                                                                             \
   experimental(intx, PredictedLoadedClassCount, 0,                          \
           "Experimental: Tune loaded class cache starting size")            \
                                                                             \
   diagnostic(bool, UnsyncloadClass, false,                                  \
           "Unstable: VM calls loadClass unsynchronized. Custom "            \
           "class loader must call VM synchronized for findClass "           \
           "and defineClass.")                                               \
                                                                             \
   product(bool, AlwaysLockClassLoader, false,                               \
           "Require the VM to acquire the class loader lock before calling " \
           "loadClass() even for class loaders registering "                 \
           "as parallel capable")                                            \
                                                                             \
   product(bool, AllowParallelDefineClass, false,                            \
           "Allow parallel defineClass requests for class loaders "          \
           "registering as parallel capable")                                \
                                                                             \
   product(bool, MustCallLoadClassInternal, false,                           \
           "Call loadClassInternal() rather than loadClass()")               \
                                                                             \
   product_pd(bool, DontYieldALot,                                           \
           "Throw away obvious excess yield calls (for Solaris only)")       \
                                                                             \
   product_pd(bool, ConvertSleepToYield,                                     \
           "Convert sleep(0) to thread yield "                               \
           "(may be off for Solaris to improve GUI)")                        \
                                                                             \
   product(bool, ConvertYieldToSleep, false,                                 \
           "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
           "behavior (Solaris only)")                                        \
                                                                             \
   product(bool, UseBoundThreads, true,                                      \
           "Bind user level threads to kernel threads (for Solaris only)")   \
                                                                             \
   develop(bool, UseDetachedThreads, true,                                   \
           "Use detached threads that are recycled upon termination "        \
           "(for Solaris only)")                                             \
                                                                             \
   product(bool, UseLWPSynchronization, true,                                \
           "Use LWP-based instead of libthread-based synchronization "       \
           "(SPARC only)")                                                   \
                                                                             \
   product(ccstr, SyncKnobs, NULL,                                           \
           "(Unstable) Various monitor synchronization tunables")            \
                                                                             \
   product(intx, EmitSync, 0,                                                \
           "(Unsafe, Unstable) "                                             \
           "Control emission of inline sync fast-path code")                 \
                                                                             \
   product(intx, MonitorBound, 0, "Bound Monitor population")                \
                                                                             \
   product(bool, MonitorInUseLists, false, "Track Monitors for Deflation")   \
                                                                             \
   product(intx, SyncFlags, 0, "(Unsafe, Unstable) Experimental Sync flags") \
                                                                             \
   product(intx, SyncVerbose, 0, "(Unstable)")                               \
                                                                             \
   product(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)")                    \
                                                                             \
   product(intx, hashCode, 5,                                                \
           "(Unstable) select hashCode generation algorithm")                \
                                                                             \
   product(intx, WorkAroundNPTLTimedWaitHang, 1,                             \
           "(Unstable, Linux-specific) "                                     \
           "avoid NPTL-FUTEX hang pthread_cond_timedwait")                   \
                                                                             \
   product(bool, FilterSpuriousWakeups, true,                                \
           "Prevent spurious or premature wakeups from object.wait "         \
           "(Solaris only)")                                                 \
                                                                             \
   experimental(intx, NativeMonitorTimeout, -1, "(Unstable)")                \
                                                                             \
   experimental(intx, NativeMonitorFlags, 0, "(Unstable)")                   \
                                                                             \
   experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)")              \
                                                                             \
   develop(bool, UsePthreads, false,                                         \
           "Use pthread-based instead of libthread-based synchronization "   \
           "(SPARC only)")                                                   \
                                                                             \
   product(bool, AdjustConcurrency, false,                                   \
           "Call thr_setconcurrency at thread creation time to avoid "       \
           "LWP starvation on MP systems (for Solaris Only)")                \
                                                                             \
   product(bool, ReduceSignalUsage, false,                                   \
           "Reduce the use of OS signals in Java and/or the VM")             \
                                                                             \
   develop_pd(bool, ShareVtableStubs,                                        \
           "Share vtable stubs (smaller code but worse branch prediction")   \
                                                                             \
   develop(bool, LoadLineNumberTables, true,                                 \
           "Tell whether the class file parser loads line number tables")    \
                                                                             \
   develop(bool, LoadLocalVariableTables, true,                              \
           "Tell whether the class file parser loads local variable tables") \
                                                                             \
   develop(bool, LoadLocalVariableTypeTables, true,                          \
           "Tell whether the class file parser loads local variable type"    \
           "tables")                                                         \
                                                                             \
   product(bool, AllowUserSignalHandlers, false,                             \
           "Do not complain if the application installs signal handlers "    \
           "(Solaris & Linux only)")                                         \
                                                                             \
   product(bool, UseSignalChaining, true,                                    \
           "Use signal-chaining to invoke signal handlers installed "        \
           "by the application (Solaris & Linux only)")                      \
                                                                             \
   product(bool, UseAltSigs, false,                                          \
           "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM "      \
           "internal signals (Solaris only)")                                \
                                                                             \
   product(bool, AllowJNIEnvProxy, false,                                    \
           "Allow JNIEnv proxies for jdbx")                                  \
                                                                             \
   product(bool, JNIDetachReleasesMonitors, true,                            \
           "JNI DetachCurrentThread releases monitors owned by thread")      \
                                                                             \
   product(bool, RestoreMXCSROnJNICalls, false,                              \
           "Restore MXCSR when returning from JNI calls")                    \
                                                                             \
   product(bool, CheckJNICalls, false,                                       \
           "Verify all arguments to JNI calls")                              \
                                                                             \
   product(bool, UseFastJNIAccessors, true,                                  \
           "Use optimized versions of Get<Primitive>Field")                  \
                                                                             \
   product(bool, EagerXrunInit, false,                                       \
           "Eagerly initialize -Xrun libraries; allows startup profiling, "  \
           "but not all -Xrun libraries may support the state of the VM "    \
           "at this time")                                                   \
                                                                             \
   product(bool, PreserveAllAnnotations, false,                              \
           "Preserve RuntimeInvisibleAnnotations as well "                   \
           "as RuntimeVisibleAnnotations")                                   \
                                                                             \
   develop(uintx, PreallocatedOutOfMemoryErrorCount, 4,                      \
           "Number of OutOfMemoryErrors preallocated with backtrace")        \
                                                                             \
   product(bool, LazyBootClassLoader, true,                                  \
           "Enable/disable lazy opening of boot class path entries")         \
                                                                             \
   product(bool, UseXMMForArrayCopy, false,                                  \
           "Use SSE2 MOVQ instruction for Arraycopy")                        \
                                                                             \
   product(intx, FieldsAllocationStyle, 1,                                   \
           "0 - type based with oops first, 1 - with oops last, "            \
           "2 - oops in super and sub classes are together")                 \
                                                                             \
   product(bool, CompactFields, true,                                        \
           "Allocate nonstatic fields in gaps between previous fields")      \
                                                                             \
   notproduct(bool, PrintFieldLayout, false,                                 \
           "Print field layout for each class")                              \
                                                                             \
   product(intx, ContendedPaddingWidth, 128,                                 \
           "How many bytes to pad the fields/classes marked @Contended with")\
                                                                             \
   product(bool, EnableContended, true,                                      \
           "Enable @Contended annotation support")                           \
                                                                             \
   product(bool, RestrictContended, true,                                    \
           "Restrict @Contended to trusted classes")                         \
                                                                             \
   product(bool, UseBiasedLocking, true,                                     \
           "Enable biased locking in JVM")                                   \
                                                                             \
   product(intx, BiasedLockingStartupDelay, 4000,                            \
           "Number of milliseconds to wait before enabling biased locking")  \
                                                                             \
   diagnostic(bool, PrintBiasedLockingStatistics, false,                     \
           "Print statistics of biased locking in JVM")                      \
                                                                             \
   product(intx, BiasedLockingBulkRebiasThreshold, 20,                       \
           "Threshold of number of revocations per type to try to "          \
           "rebias all objects in the heap of that type")                    \
                                                                             \
   product(intx, BiasedLockingBulkRevokeThreshold, 40,                       \
           "Threshold of number of revocations per type to permanently "     \
           "revoke biases of all objects in the heap of that type")          \
                                                                             \
   product(intx, BiasedLockingDecayTime, 25000,                              \
           "Decay time (in milliseconds) to re-enable bulk rebiasing of a "  \
           "type after previous bulk rebias")                                \
                                                                             \
   /* tracing */                                                             \
                                                                             \
   notproduct(bool, TraceRuntimeCalls, false,                                \
           "Trace run-time calls")                                           \
                                                                             \
   develop(bool, TraceJNICalls, false,                                       \
           "Trace JNI calls")                                                \
                                                                             \
   develop(bool, StressRewriter, false,                                      \
           "Stress linktime bytecode rewriting")                             \
                                                                             \
   notproduct(bool, TraceJVMCalls, false,                                    \
           "Trace JVM calls")                                                \
                                                                             \
   product(ccstr, TraceJVMTI, NULL,                                          \
           "Trace flags for JVMTI functions and events")                     \
                                                                             \
   /* This option can change an EMCP method into an obsolete method. */      \
   /* This can affect tests that except specific methods to be EMCP. */      \
   /* This option should be used with caution. */                            \
   product(bool, StressLdcRewrite, false,                                    \
           "Force ldc -> ldc_w rewrite during RedefineClasses")              \
                                                                             \
   product(intx, TraceRedefineClasses, 0,                                    \
           "Trace level for JVMTI RedefineClasses")                          \
                                                                             \
   develop(bool, StressMethodComparator, false,                              \
           "Run the MethodComparator on all loaded methods")                 \
                                                                             \
   /* change to false by default sometime after Mustang */                   \
   product(bool, VerifyMergedCPBytecodes, true,                              \
           "Verify bytecodes after RedefineClasses constant pool merging")   \
                                                                             \
   develop(bool, TraceJNIHandleAllocation, false,                            \
           "Trace allocation/deallocation of JNI handle blocks")             \
                                                                             \
   develop(bool, TraceThreadEvents, false,                                   \
           "Trace all thread events")                                        \
                                                                             \
   develop(bool, TraceBytecodes, false,                                      \
           "Trace bytecode execution")                                       \
                                                                             \
   develop(bool, TraceClassInitialization, false,                            \
           "Trace class initialization")                                     \
                                                                             \
   develop(bool, TraceExceptions, false,                                     \
           "Trace exceptions")                                               \
                                                                             \
   develop(bool, TraceICs, false,                                            \
           "Trace inline cache changes")                                     \
                                                                             \
   notproduct(bool, TraceInvocationCounterOverflow, false,                   \
           "Trace method invocation counter overflow")                       \
                                                                             \
   develop(bool, TraceInlineCacheClearing, false,                            \
           "Trace clearing of inline caches in nmethods")                    \
                                                                             \
   develop(bool, TraceDependencies, false,                                   \
           "Trace dependencies")                                             \
                                                                             \
   develop(bool, VerifyDependencies, trueInDebug,                            \
           "Exercise and verify the compilation dependency mechanism")       \
                                                                             \
   develop(bool, TraceNewOopMapGeneration, false,                            \
           "Trace OopMapGeneration")                                         \
                                                                             \
   develop(bool, TraceNewOopMapGenerationDetailed, false,                    \
           "Trace OopMapGeneration: print detailed cell states")             \
                                                                             \
   develop(bool, TimeOopMap, false,                                          \
           "Time calls to GenerateOopMap::compute_map() in sum")             \
                                                                             \
   develop(bool, TimeOopMap2, false,                                         \
           "Time calls to GenerateOopMap::compute_map() individually")       \
                                                                             \
   develop(bool, TraceMonitorMismatch, false,                                \
           "Trace monitor matching failures during OopMapGeneration")        \
                                                                             \
   develop(bool, TraceOopMapRewrites, false,                                 \
           "Trace rewriting of method oops during oop map generation")       \
                                                                             \
   develop(bool, TraceSafepoint, false,                                      \
           "Trace safepoint operations")                                     \
                                                                             \
   develop(bool, TraceICBuffer, false,                                       \
           "Trace usage of IC buffer")                                       \
                                                                             \
   develop(bool, TraceCompiledIC, false,                                     \
           "Trace changes of compiled IC")                                   \
                                                                             \
   notproduct(bool, TraceZapDeadLocals, false,                               \
           "Trace zapping dead locals")                                      \
                                                                             \
   develop(bool, TraceStartupTime, false,                                    \
           "Trace setup time")                                               \
                                                                             \
   develop(bool, TraceProtectionDomainVerification, false,                   \
           "Trace protection domain verification")                           \
                                                                             \
   develop(bool, TraceClearedExceptions, false,                              \
           "Print when an exception is forcibly cleared")                    \
                                                                             \
   product(bool, TraceClassResolution, false,                                \
           "Trace all constant pool resolutions (for debugging)")            \
                                                                             \
   product(bool, TraceBiasedLocking, false,                                  \
           "Trace biased locking in JVM")                                    \
                                                                             \
   product(bool, TraceMonitorInflation, false,                               \
           "Trace monitor inflation in JVM")                                 \
                                                                             \
   /* gc */                                                                  \
                                                                             \
   product(bool, UseSerialGC, false,                                         \
           "Use the Serial garbage collector")                               \
                                                                             \
   product(bool, UseG1GC, false,                                             \
           "Use the Garbage-First garbage collector")                        \
                                                                             \
   product(bool, UseParallelGC, false,                                       \
           "Use the Parallel Scavenge garbage collector")                    \
                                                                             \
   product(bool, UseParallelOldGC, false,                                    \
           "Use the Parallel Old garbage collector")                         \
                                                                             \
   product(uintx, HeapMaximumCompactionInterval, 20,                         \
           "How often should we maximally compact the heap (not allowing "   \
           "any dead space)")                                                \
                                                                             \
   product(uintx, HeapFirstMaximumCompactionCount, 3,                        \
           "The collection count for the first maximum compaction")          \
                                                                             \
   product(bool, UseMaximumCompactionOnSystemGC, true,                       \
           "Use maximum compaction in the Parallel Old garbage collector "   \
           "for a system GC")                                                \
                                                                             \
   product(uintx, ParallelOldDeadWoodLimiterMean, 50,                        \
           "The mean used by the parallel compact dead wood "                \
           "limiter (a number between 0-100)")                               \
                                                                             \
   product(uintx, ParallelOldDeadWoodLimiterStdDev, 80,                      \
           "The standard deviation used by the parallel compact dead wood "  \
           "limiter (a number between 0-100)")                               \
                                                                             \
   product(uintx, ParallelGCThreads, 0,                                      \
           "Number of parallel threads parallel gc will use")                \
                                                                             \
   product(bool, UseDynamicNumberOfGCThreads, false,                         \
           "Dynamically choose the number of parallel threads "              \
           "parallel gc will use")                                           \
                                                                             \
   diagnostic(bool, ForceDynamicNumberOfGCThreads, false,                    \
           "Force dynamic selection of the number of "                       \
           "parallel threads parallel gc will use to aid debugging")         \
                                                                             \
   product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M),               \
           "Size of heap (bytes) per GC thread used in calculating the "     \
           "number of GC threads")                                           \
                                                                             \
   product(bool, TraceDynamicGCThreads, false,                               \
           "Trace the dynamic GC thread usage")                              \
                                                                             \
   develop(bool, ParallelOldGCSplitALot, false,                              \
           "Provoke splitting (copying data from a young gen space to "      \
           "multiple destination spaces)")                                   \
                                                                             \
   develop(uintx, ParallelOldGCSplitInterval, 3,                             \
           "How often to provoke splitting a young gen space")               \
                                                                             \
   product(uintx, ConcGCThreads, 0,                                          \
           "Number of threads concurrent gc will use")                       \
                                                                             \
   product(uintx, YoungPLABSize, 4096,                                       \
           "Size of young gen promotion LAB's (in HeapWords)")               \
                                                                             \
   product(uintx, OldPLABSize, 1024,                                         \
           "Size of old gen promotion LAB's (in HeapWords)")                 \
                                                                             \
   product(uintx, GCTaskTimeStampEntries, 200,                               \
           "Number of time stamp entries per gc worker thread")              \
                                                                             \
   product(bool, AlwaysTenure, false,                                        \
           "Always tenure objects in eden (ParallelGC only)")                \
                                                                             \
   product(bool, NeverTenure, false,                                         \
           "Never tenure objects in eden, may tenure on overflow "           \
           "(ParallelGC only)")                                              \
                                                                             \
   product(bool, ScavengeBeforeFullGC, true,                                 \
           "Scavenge youngest generation before each full GC, "              \
           "used with UseParallelGC")                                        \
                                                                             \
   develop(bool, ScavengeWithObjectsInToSpace, false,                        \
           "Allow scavenges to occur when to-space contains objects")        \
                                                                             \
   product(bool, UseConcMarkSweepGC, false,                                  \
           "Use Concurrent Mark-Sweep GC in the old generation")             \
                                                                             \
   product(bool, ExplicitGCInvokesConcurrent, false,                         \
           "A System.gc() request invokes a concurrent collection; "         \
           "(effective only when UseConcMarkSweepGC)")                       \
                                                                             \
   product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false,        \
           "A System.gc() request invokes a concurrent collection and "      \
           "also unloads classes during such a concurrent gc cycle "         \
           "(effective only when UseConcMarkSweepGC)")                       \
                                                                             \
   product(bool, GCLockerInvokesConcurrent, false,                           \
           "The exit of a JNI critical section necessitating a scavenge, "   \
           "also kicks off a background concurrent collection")              \
                                                                             \
   product(uintx, GCLockerEdenExpansionPercent, 5,                           \
           "How much the GC can expand the eden by while the GC locker "     \
           "is active (as a percentage)")                                    \
                                                                             \
   diagnostic(intx, GCLockerRetryAllocationCount, 2,                         \
           "Number of times to retry allocations when "                      \
           "blocked by the GC locker")                                       \
                                                                             \
   develop(bool, UseCMSAdaptiveFreeLists, true,                              \
           "Use adaptive free lists in the CMS generation")                  \
                                                                             \
   develop(bool, UseAsyncConcMarkSweepGC, true,                              \
           "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
                                                                             \
   develop(bool, RotateCMSCollectionTypes, false,                            \
           "Rotate the CMS collections among concurrent and STW")            \
                                                                             \
   product(bool, UseCMSBestFit, true,                                        \
           "Use CMS best fit allocation strategy")                           \
                                                                             \
   product(bool, UseCMSCollectionPassing, true,                              \
           "Use passing of collection from background to foreground")        \
                                                                             \
   product(bool, UseParNewGC, false,                                         \
           "Use parallel threads in the new generation")                     \
                                                                             \
   product(bool, ParallelGCVerbose, false,                                   \
           "Verbose output for parallel gc")                                 \
                                                                             \
   product(uintx, ParallelGCBufferWastePct, 10,                              \
           "Wasted fraction of parallel allocation buffer")                  \
                                                                             \
   diagnostic(bool, ParallelGCRetainPLAB, false,                             \
           "Retain parallel allocation buffers across scavenges; "           \
           "it is disabled because this currently conflicts with "           \
           "parallel card scanning under certain conditions.")               \
                                                                             \
   product(uintx, TargetPLABWastePct, 10,                                    \
           "Target wasted space in last buffer as percent of overall "       \
           "allocation")                                                     \
                                                                             \
   product(uintx, PLABWeight, 75,                                            \
           "Percentage (0-100) used to weigh the current sample when "       \
           "computing exponentially decaying average for ResizePLAB")        \
                                                                             \
   product(bool, ResizePLAB, true,                                           \
           "Dynamically resize (survivor space) promotion LAB's")            \
                                                                             \
   product(bool, PrintPLAB, false,                                           \
           "Print (survivor space) promotion LAB's sizing decisions")        \
                                                                             \
   product(intx, ParGCArrayScanChunk, 50,                                    \
           "Scan a subset of object array and push remainder, if array is "  \
           "bigger than this")                                               \
                                                                             \
   product(bool, ParGCUseLocalOverflow, false,                               \
           "Instead of a global overflow list, use local overflow stacks")   \
                                                                             \
   product(bool, ParGCTrimOverflow, true,                                    \
           "Eagerly trim the local overflow lists "                          \
           "(when ParGCUseLocalOverflow)")                                   \
                                                                             \
   notproduct(bool, ParGCWorkQueueOverflowALot, false,                       \
           "Simulate work queue overflow in ParNew")                         \
                                                                             \
   notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000,                   \
           "An `interval' counter that determines how frequently "           \
           "we simulate overflow; a smaller number increases frequency")     \
                                                                             \
   product(uintx, ParGCDesiredObjsFromOverflowList, 20,                      \
           "The desired number of objects to claim from the overflow list")  \
                                                                             \
   diagnostic(uintx, ParGCStridesPerThread, 2,                               \
           "The number of strides per worker thread that we divide up the "  \
           "card table scanning work into")                                  \
                                                                             \
   diagnostic(intx, ParGCCardsPerStrideChunk, 256,                           \
           "The number of cards in each chunk of the parallel chunks used "  \
           "during card table scanning")                                     \
                                                                             \
   product(uintx, CMSParPromoteBlocksToClaim, 16,                            \
           "Number of blocks to attempt to claim when refilling CMS LAB's "  \
           "for parallel GC")                                                \
                                                                             \
   product(uintx, OldPLABWeight, 50,                                         \
           "Percentage (0-100) used to weight the current sample when "      \
           "computing exponentially decaying average for resizing "          \
           "CMSParPromoteBlocksToClaim")                                     \
                                                                             \
   product(bool, ResizeOldPLAB, true,                                        \
           "Dynamically resize (old gen) promotion LAB's")                   \
                                                                             \
   product(bool, PrintOldPLAB, false,                                        \
           "Print (old gen) promotion LAB's sizing decisions")               \
                                                                             \
   product(uintx, CMSOldPLABMin, 16,                                         \
           "Minimum size of CMS gen promotion LAB caches per worker "        \
           "per block size")                                                 \
                                                                             \
   product(uintx, CMSOldPLABMax, 1024,                                       \
           "Maximum size of CMS gen promotion LAB caches per worker "        \
           "per block size")                                                 \
                                                                             \
   product(uintx, CMSOldPLABNumRefills, 4,                                   \
           "Nominal number of refills of CMS gen promotion LAB cache "       \
           "per worker per block size")                                      \
                                                                             \
   product(bool, CMSOldPLABResizeQuicker, false,                             \
           "React on-the-fly during a scavenge to a sudden "                 \
           "change in block demand rate")                                    \
                                                                             \
   product(uintx, CMSOldPLABToleranceFactor, 4,                              \
           "The tolerance of the phase-change detector for on-the-fly "      \
           "PLAB resizing during a scavenge")                                \
                                                                             \
   product(uintx, CMSOldPLABReactivityFactor, 2,                             \
           "The gain in the feedback loop for on-the-fly PLAB resizing "     \
           "during a scavenge")                                              \
                                                                             \
   product(bool, AlwaysPreTouch, false,                                      \
           "Force all freshly committed pages to be pre-touched")            \
                                                                             \
   product_pd(uintx, CMSYoungGenPerWorker,                                   \
           "The maximum size of young gen chosen by default per GC worker "  \
           "thread available")                                               \
                                                                             \
   product(bool, CMSIncrementalMode, false,                                  \
           "Whether CMS GC should operate in \"incremental\" mode")          \
                                                                             \
   product(uintx, CMSIncrementalDutyCycle, 10,                               \
           "Percentage (0-100) of CMS incremental mode duty cycle. If "      \
           "CMSIncrementalPacing is enabled, then this is just the initial " \
           "value.")                                                         \
                                                                             \
   product(bool, CMSIncrementalPacing, true,                                 \
           "Whether the CMS incremental mode duty cycle should be "          \
           "automatically adjusted")                                         \
                                                                             \
   product(uintx, CMSIncrementalDutyCycleMin, 0,                             \
           "Minimum percentage (0-100) of the CMS incremental duty cycle "   \
           "used when CMSIncrementalPacing is enabled")                      \
                                                                             \
   product(uintx, CMSIncrementalSafetyFactor, 10,                            \
           "Percentage (0-100) used to add conservatism when computing the " \
           "duty cycle")                                                     \
                                                                             \
   product(uintx, CMSIncrementalOffset, 0,                                   \
           "Percentage (0-100) by which the CMS incremental mode duty cycle "\
           "is shifted to the right within the period between young GCs")    \
                                                                             \
   product(uintx, CMSExpAvgFactor, 50,                                       \
           "Percentage (0-100) used to weigh the current sample when "       \
           "computing exponential averages for CMS statistics")              \
                                                                             \
   product(uintx, CMS_FLSWeight, 75,                                         \
           "Percentage (0-100) used to weigh the current sample when "       \
           "computing exponentially decaying averages for CMS FLS "          \
           "statistics")                                                     \
                                                                             \
   product(uintx, CMS_FLSPadding, 1,                                         \
           "The multiple of deviation from mean to use for buffering "       \
           "against volatility in free list demand")                         \
                                                                             \
   product(uintx, FLSCoalescePolicy, 2,                                      \
           "CMS: aggressiveness level for coalescing, increasing "           \
           "from 0 to 4")                                                    \
                                                                             \
   product(bool, FLSAlwaysCoalesceLarge, false,                              \
           "CMS: larger free blocks are always available for coalescing")    \
                                                                             \
   product(double, FLSLargestBlockCoalesceProximity, 0.99,                   \
           "CMS: the smaller the percentage the greater the coalescing "     \
           "force")                                                          \
                                                                             \
   product(double, CMSSmallCoalSurplusPercent, 1.05,                         \
           "CMS: the factor by which to inflate estimated demand of small "  \
           "block sizes to prevent coalescing with an adjoining block")      \
                                                                             \
   product(double, CMSLargeCoalSurplusPercent, 0.95,                         \
           "CMS: the factor by which to inflate estimated demand of large "  \
           "block sizes to prevent coalescing with an adjoining block")      \
                                                                             \
   product(double, CMSSmallSplitSurplusPercent, 1.10,                        \
           "CMS: the factor by which to inflate estimated demand of small "  \
           "block sizes to prevent splitting to supply demand for smaller "  \
           "blocks")                                                         \
                                                                             \
   product(double, CMSLargeSplitSurplusPercent, 1.00,                        \
           "CMS: the factor by which to inflate estimated demand of large "  \
           "block sizes to prevent splitting to supply demand for smaller "  \
           "blocks")                                                         \
                                                                             \
   product(bool, CMSExtrapolateSweep, false,                                 \
           "CMS: cushion for block demand during sweep")                     \
                                                                             \
   product(uintx, CMS_SweepWeight, 75,                                       \
           "Percentage (0-100) used to weight the current sample when "      \
           "computing exponentially decaying average for inter-sweep "       \
           "duration")                                                       \
                                                                             \
   product(uintx, CMS_SweepPadding, 1,                                       \
           "The multiple of deviation from mean to use for buffering "       \
           "against volatility in inter-sweep duration")                     \
                                                                             \
   product(uintx, CMS_SweepTimerThresholdMillis, 10,                         \
           "Skip block flux-rate sampling for an epoch unless inter-sweep "  \
           "duration exceeds this threshold in milliseconds")                \
                                                                             \
   develop(bool, CMSTraceIncrementalMode, false,                             \
           "Trace CMS incremental mode")                                     \
                                                                             \
   develop(bool, CMSTraceIncrementalPacing, false,                           \
           "Trace CMS incremental mode pacing computation")                  \
                                                                             \
   develop(bool, CMSTraceThreadState, false,                                 \
           "Trace the CMS thread state (enable the trace_state() method)")   \
                                                                             \
   product(bool, CMSClassUnloadingEnabled, true,                             \
           "Whether class unloading enabled when using CMS GC")              \
                                                                             \
   product(uintx, CMSClassUnloadingMaxInterval, 0,                           \
           "When CMS class unloading is enabled, the maximum CMS cycle "     \
           "count for which classes may not be unloaded")                    \
                                                                             \
   product(bool, CMSCompactWhenClearAllSoftRefs, true,                       \
           "Compact when asked to collect CMS gen with "                     \
           "clear_all_soft_refs()")                                          \
                                                                             \
   product(bool, UseCMSCompactAtFullCollection, true,                        \
           "Use Mark-Sweep-Compact algorithm at full collections")           \
                                                                             \
   product(uintx, CMSFullGCsBeforeCompaction, 0,                             \
           "Number of CMS full collection done before compaction if > 0")    \
                                                                             \
   develop(intx, CMSDictionaryChoice, 0,                                     \
           "Use BinaryTreeDictionary as default in the CMS generation")      \
                                                                             \
   product(uintx, CMSIndexedFreeListReplenish, 4,                            \
           "Replenish an indexed free list with this number of chunks")      \
                                                                             \
   product(bool, CMSReplenishIntermediate, true,                             \
           "Replenish all intermediate free-list caches")                    \
                                                                             \
   product(bool, CMSSplitIndexedFreeListBlocks, true,                        \
           "When satisfying batched demand, split blocks from the "          \
           "IndexedFreeList whose size is a multiple of requested size")     \
                                                                             \
   product(bool, CMSLoopWarn, false,                                         \
           "Warn in case of excessive CMS looping")                          \
                                                                             \
   develop(bool, CMSOverflowEarlyRestoration, false,                         \
           "Restore preserved marks early")                                  \
                                                                             \
   product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M),              \
           "Size of marking stack")                                          \
                                                                             \
   product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M),          \
           "Maximum size of marking stack")                                  \
                                                                             \
   notproduct(bool, CMSMarkStackOverflowALot, false,                         \
           "Simulate frequent marking stack / work queue overflow")          \
                                                                             \
   notproduct(uintx, CMSMarkStackOverflowInterval, 1000,                     \
           "An \"interval\" counter that determines how frequently "         \
           "to simulate overflow; a smaller number increases frequency")     \
                                                                             \
   product(uintx, CMSMaxAbortablePrecleanLoops, 0,                           \
           "(Temporary, subject to experimentation) "                        \
           "Maximum number of abortable preclean iterations, if > 0")        \
                                                                             \
   product(intx, CMSMaxAbortablePrecleanTime, 5000,                          \
           "(Temporary, subject to experimentation) "                        \
           "Maximum time in abortable preclean (in milliseconds)")           \
                                                                             \
   product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100,              \
           "(Temporary, subject to experimentation) "                        \
           "Nominal minimum work per abortable preclean iteration")          \
                                                                             \
   manageable(intx, CMSAbortablePrecleanWaitMillis, 100,                     \
           "(Temporary, subject to experimentation) "                        \
           "Time that we sleep between iterations when not given "           \
           "enough work per iteration")                                      \
                                                                             \
   product(uintx, CMSRescanMultiple, 32,                                     \
           "Size (in cards) of CMS parallel rescan task")                    \
                                                                             \
   product(uintx, CMSConcMarkMultiple, 32,                                   \
           "Size (in cards) of CMS concurrent MT marking task")              \
                                                                             \
   product(bool, CMSAbortSemantics, false,                                   \
           "Whether abort-on-overflow semantics is implemented")             \
                                                                             \
   product(bool, CMSParallelInitialMarkEnabled, true,                        \
           "Use the parallel initial mark.")                                 \
                                                                             \
   product(bool, CMSParallelRemarkEnabled, true,                             \
           "Whether parallel remark enabled (only if ParNewGC)")             \
                                                                             \
   product(bool, CMSParallelSurvivorRemarkEnabled, true,                     \
           "Whether parallel remark of survivor space "                      \
           "enabled (effective only if CMSParallelRemarkEnabled)")           \
                                                                             \
   product(bool, CMSPLABRecordAlways, true,                                  \
           "Always record survivor space PLAB boundaries (effective only "   \
           "if CMSParallelSurvivorRemarkEnabled)")                           \
                                                                             \
   product(bool, CMSEdenChunksRecordAlways, true,                            \
           "Always record eden chunks used for the parallel initial mark "   \
           "or remark of eden")                                              \
                                                                             \
   product(bool, CMSPrintEdenSurvivorChunks, false,                          \
           "Print the eden and the survivor chunks used for the parallel "   \
           "initial mark or remark of the eden/survivor spaces")             \
                                                                             \
   product(bool, CMSConcurrentMTEnabled, true,                               \
           "Whether multi-threaded concurrent work enabled "                 \
           "(effective only if ParNewGC)")                                   \
                                                                             \
   product(bool, CMSPrecleaningEnabled, true,                                \
           "Whether concurrent precleaning enabled")                         \
                                                                             \
   product(uintx, CMSPrecleanIter, 3,                                        \
           "Maximum number of precleaning iteration passes")                 \
                                                                             \
   product(uintx, CMSPrecleanNumerator, 2,                                   \
           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
           "ratio")                                                          \
                                                                             \
   product(uintx, CMSPrecleanDenominator, 3,                                 \
           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
           "ratio")                                                          \
                                                                             \
   product(bool, CMSPrecleanRefLists1, true,                                 \
           "Preclean ref lists during (initial) preclean phase")             \
                                                                             \
   product(bool, CMSPrecleanRefLists2, false,                                \
           "Preclean ref lists during abortable preclean phase")             \
                                                                             \
   product(bool, CMSPrecleanSurvivors1, false,                               \
           "Preclean survivors during (initial) preclean phase")             \
                                                                             \
   product(bool, CMSPrecleanSurvivors2, true,                                \
           "Preclean survivors during abortable preclean phase")             \
                                                                             \
   product(uintx, CMSPrecleanThreshold, 1000,                                \
           "Do not iterate again if number of dirty cards is less than this")\
                                                                             \
   product(bool, CMSCleanOnEnter, true,                                      \
           "Clean-on-enter optimization for reducing number of dirty cards") \
                                                                             \
   product(uintx, CMSRemarkVerifyVariant, 1,                                 \
           "Choose variant (1,2) of verification following remark")          \
                                                                             \
   product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M,                   \
           "If Eden size is below this, do not try to schedule remark")      \
                                                                             \
   product(uintx, CMSScheduleRemarkEdenPenetration, 50,                      \
           "The Eden occupancy percentage (0-100) at which "                 \
           "to try and schedule remark pause")                               \
                                                                             \
   product(uintx, CMSScheduleRemarkSamplingRatio, 5,                         \
           "Start sampling eden top at least before young gen "              \
           "occupancy reaches 1/<ratio> of the size at which "               \
           "we plan to schedule remark")                                     \
                                                                             \
   product(uintx, CMSSamplingGrain, 16*K,                                    \
           "The minimum distance between eden samples for CMS (see above)")  \
                                                                             \
   product(bool, CMSScavengeBeforeRemark, false,                             \
           "Attempt scavenge before the CMS remark step")                    \
                                                                             \
   develop(bool, CMSTraceSweeper, false,                                     \
           "Trace some actions of the CMS sweeper")                          \
                                                                             \
   product(uintx, CMSWorkQueueDrainThreshold, 10,                            \
           "Don't drain below this size per parallel worker/thief")          \
                                                                             \
   manageable(intx, CMSWaitDuration, 2000,                                   \
           "Time in milliseconds that CMS thread waits for young GC")        \
                                                                             \
   develop(uintx, CMSCheckInterval, 1000,                                    \
           "Interval in milliseconds that CMS thread checks if it "          \
           "should start a collection cycle")                                \
                                                                             \
   product(bool, CMSYield, true,                                             \
           "Yield between steps of CMS")                                     \
                                                                             \
   product(uintx, CMSBitMapYieldQuantum, 10*M,                               \
           "Bitmap operations should process at most this many bits "        \
           "between yields")                                                 \
                                                                             \
   product(bool, CMSDumpAtPromotionFailure, false,                           \
           "Dump useful information about the state of the CMS old "         \
           "generation upon a promotion failure")                            \
                                                                             \
   product(bool, CMSPrintChunksInDump, false,                                \
           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
           "more detailed information about the free chunks")                \
                                                                             \
   product(bool, CMSPrintObjectsInDump, false,                               \
           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
           "more detailed information about the allocated objects")          \
                                                                             \
   diagnostic(bool, FLSVerifyAllHeapReferences, false,                       \
           "Verify that all references across the FLS boundary "             \
           "are to valid objects")                                           \
                                                                             \
   diagnostic(bool, FLSVerifyLists, false,                                   \
           "Do lots of (expensive) FreeListSpace verification")              \
                                                                             \
   diagnostic(bool, FLSVerifyIndexTable, false,                              \
           "Do lots of (expensive) FLS index table verification")            \
                                                                             \
   develop(bool, FLSVerifyDictionary, false,                                 \
           "Do lots of (expensive) FLS dictionary verification")             \
                                                                             \
   develop(bool, VerifyBlockOffsetArray, false,                              \
           "Do (expensive) block offset array verification")                 \
                                                                             \
   diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false,              \
           "Maintain _unallocated_block in BlockOffsetArray "                \
           "(currently applicable only to CMS collector)")                   \
                                                                             \
   develop(bool, TraceCMSState, false,                                       \
           "Trace the state of the CMS collection")                          \
                                                                             \
   product(intx, RefDiscoveryPolicy, 0,                                      \
           "Select type of reference discovery policy: "                     \
           "reference-based(0) or referent-based(1)")                        \
                                                                             \
   product(bool, ParallelRefProcEnabled, false,                              \
           "Enable parallel reference processing whenever possible")         \
                                                                             \
   product(bool, ParallelRefProcBalancingEnabled, true,                      \
           "Enable balancing of reference processing queues")                \
                                                                             \
   product(uintx, CMSTriggerRatio, 80,                                       \
           "Percentage of MinHeapFreeRatio in CMS generation that is "       \
           "allocated before a CMS collection cycle commences")              \
                                                                             \
   product(uintx, CMSBootstrapOccupancy, 50,                                 \
           "Percentage CMS generation occupancy at which to "                \
           "initiate CMS collection for bootstrapping collection stats")     \
                                                                             \
   product(intx, CMSInitiatingOccupancyFraction, -1,                         \
           "Percentage CMS generation occupancy to start a CMS collection "  \
           "cycle. A negative value means that CMSTriggerRatio is used")     \
                                                                             \
   product(uintx, InitiatingHeapOccupancyPercent, 45,                        \
           "Percentage of the (entire) heap occupancy to start a "           \
           "concurrent GC cycle. It is used by GCs that trigger a "          \
           "concurrent GC cycle based on the occupancy of the entire heap, " \
           "not just one of the generations (e.g., G1). A value of 0 "       \
           "denotes 'do constant GC cycles'.")                               \
                                                                             \
   product(bool, UseCMSInitiatingOccupancyOnly, false,                       \
           "Only use occupancy as a criterion for starting a CMS collection")\
                                                                             \
   product(uintx, CMSIsTooFullPercentage, 98,                                \
           "An absolute ceiling above which CMS will always consider the "   \
           "unloading of classes when class unloading is enabled")           \
                                                                             \
   develop(bool, CMSTestInFreeList, false,                                   \
           "Check if the coalesced range is already in the "                 \
           "free lists as claimed")                                          \
                                                                             \
   notproduct(bool, CMSVerifyReturnedBytes, false,                           \
           "Check that all the garbage collected was returned to the "       \
           "free lists")                                                     \
                                                                             \
   notproduct(bool, ScavengeALot, false,                                     \
           "Force scavenge at every Nth exit from the runtime system "       \
           "(N=ScavengeALotInterval)")                                       \
                                                                             \
   develop(bool, FullGCALot, false,                                          \
           "Force full gc at every Nth exit from the runtime system "        \
           "(N=FullGCALotInterval)")                                         \
                                                                             \
   notproduct(bool, GCALotAtAllSafepoints, false,                            \
           "Enforce ScavengeALot/GCALot at all potential safepoints")        \
                                                                             \
   product(bool, PrintPromotionFailure, false,                               \
           "Print additional diagnostic information following "              \
           "promotion failure")                                              \
                                                                             \
   notproduct(bool, PromotionFailureALot, false,                             \
           "Use promotion failure handling on every youngest generation "    \
           "collection")                                                     \
                                                                             \
   develop(uintx, PromotionFailureALotCount, 1000,                           \
           "Number of promotion failures occurring at ParGCAllocBuffer "     \
           "refill attempts (ParNew) or promotion attempts "                 \
           "(other young collectors)")                                       \
                                                                             \
   develop(uintx, PromotionFailureALotInterval, 5,                           \
           "Total collections between promotion failures alot")              \
                                                                             \
   experimental(uintx, WorkStealingSleepMillis, 1,                           \
           "Sleep time when sleep is used for yields")                       \
                                                                             \
   experimental(uintx, WorkStealingYieldsBeforeSleep, 5000,                  \
           "Number of yields before a sleep is done during workstealing")    \
                                                                             \
   experimental(uintx, WorkStealingHardSpins, 4096,                          \
           "Number of iterations in a spin loop between checks on "          \
           "time out of hard spin")                                          \
                                                                             \
   experimental(uintx, WorkStealingSpinToYieldRatio, 10,                     \
           "Ratio of hard spins to calls to yield")                          \
                                                                             \
   develop(uintx, ObjArrayMarkingStride, 512,                                \
           "Number of object array elements to push onto the marking stack " \
           "before pushing a continuation entry")                            \
                                                                             \
   develop(bool, MetadataAllocationFailALot, false,                          \
           "Fail metadata allocations at intervals controlled by "           \
           "MetadataAllocationFailALotInterval")                             \
                                                                             \
   develop(uintx, MetadataAllocationFailALotInterval, 1000,                  \
           "Metadata allocation failure a lot interval")                     \
                                                                             \
   develop(bool, TraceMetadataChunkAllocation, false,                        \
           "Trace chunk metadata allocations")                               \
                                                                             \
   product(bool, TraceMetadataHumongousAllocation, false,                    \
           "Trace humongous metadata allocations")                           \
                                                                             \
   develop(bool, TraceMetavirtualspaceAllocation, false,                     \
           "Trace virtual space metadata allocations")                       \
                                                                             \
   notproduct(bool, ExecuteInternalVMTests, false,                           \
           "Enable execution of internal VM tests")                          \
                                                                             \
   notproduct(bool, VerboseInternalVMTests, false,                           \
           "Turn on logging for internal VM tests.")                         \
                                                                             \
   product_pd(bool, UseTLAB, "Use thread-local object allocation")           \
                                                                             \
   product_pd(bool, ResizeTLAB,                                              \
           "Dynamically resize TLAB size for threads")                       \
                                                                             \
   product(bool, ZeroTLAB, false,                                            \
           "Zero out the newly created TLAB")                                \
                                                                             \
   product(bool, FastTLABRefill, true,                                       \
           "Use fast TLAB refill code")                                      \
                                                                             \
   product(bool, PrintTLAB, false,                                           \
           "Print various TLAB related information")                         \
                                                                             \
   product(bool, TLABStats, true,                                            \
           "Provide more detailed and expensive TLAB statistics "            \
           "(with PrintTLAB)")                                               \
                                                                             \
   EMBEDDED_ONLY(product(bool, LowMemoryProtection, true,                    \
           "Enable LowMemoryProtection"))                                    \
                                                                             \
   product_pd(bool, NeverActAsServerClassMachine,                            \
           "Never act like a server-class machine")                          \
                                                                             \
   product(bool, AlwaysActAsServerClassMachine, false,                       \
           "Always act like a server-class machine")                         \
                                                                             \
   product_pd(uint64_t, MaxRAM,                                              \
           "Real memory size (in bytes) used to set maximum heap size")      \
                                                                             \
   product(uintx, ErgoHeapSizeLimit, 0,                                      \
           "Maximum ergonomically set heap size (in bytes); zero means use " \
           "MaxRAM / MaxRAMFraction")                                        \
                                                                             \
   product(uintx, MaxRAMFraction, 4,                                         \
           "Maximum fraction (1/n) of real memory used for maximum heap "    \
           "size")                                                           \
                                                                             \
   product(uintx, DefaultMaxRAMFraction, 4,                                  \
           "Maximum fraction (1/n) of real memory used for maximum heap "    \
           "size; deprecated: to be renamed to MaxRAMFraction")              \
                                                                             \
   product(uintx, MinRAMFraction, 2,                                         \
           "Minimum fraction (1/n) of real memory used for maxmimum heap "   \
           "size on systems with small physical memory size")                \
                                                                             \
   product(uintx, InitialRAMFraction, 64,                                    \
           "Fraction (1/n) of real memory used for initial heap size")       \
                                                                             \
   develop(uintx, MaxVirtMemFraction, 2,                                     \
           "Maximum fraction (1/n) of virtual memory used for ergonomically "\
           "determining maximum heap size")                                  \
                                                                             \
   product(bool, UseAutoGCSelectPolicy, false,                               \
           "Use automatic collection selection policy")                      \
                                                                             \
   product(uintx, AutoGCSelectPauseMillis, 5000,                             \
           "Automatic GC selection pause threshold in milliseconds")         \
                                                                             \
   product(bool, UseAdaptiveSizePolicy, true,                                \
           "Use adaptive generation sizing policies")                        \
                                                                             \
   product(bool, UsePSAdaptiveSurvivorSizePolicy, true,                      \
           "Use adaptive survivor sizing policies")                          \
                                                                             \
   product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true,     \
           "Use adaptive young-old sizing policies at minor collections")    \
                                                                             \
   product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true,     \
           "Use adaptive young-old sizing policies at major collections")    \
                                                                             \
   product(bool, UseAdaptiveSizePolicyWithSystemGC, false,                   \
           "Include statistics from System.gc() for adaptive size policy")   \
                                                                             \
   product(bool, UseAdaptiveGCBoundary, false,                               \
           "Allow young-old boundary to move")                               \
                                                                             \
   develop(bool, TraceAdaptiveGCBoundary, false,                             \
           "Trace young-old boundary moves")                                 \
                                                                             \
   develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1,             \
           "Resize the virtual spaces of the young or old generations")      \
                                                                             \
   product(uintx, AdaptiveSizeThroughPutPolicy, 0,                           \
           "Policy for changing generation size for throughput goals")       \
                                                                             \
   product(uintx, AdaptiveSizePausePolicy, 0,                                \
           "Policy for changing generation size for pause goals")            \
                                                                             \
   develop(bool, PSAdjustTenuredGenForMinorPause, false,                     \
           "Adjust tenured generation to achieve a minor pause goal")        \
                                                                             \
   develop(bool, PSAdjustYoungGenForMajorPause, false,                       \
           "Adjust young generation to achieve a major pause goal")          \
                                                                             \
   product(uintx, AdaptiveSizePolicyInitializingSteps, 20,                   \
           "Number of steps where heuristics is used before data is used")   \
                                                                             \
   develop(uintx, AdaptiveSizePolicyReadyThreshold, 5,                       \
           "Number of collections before the adaptive sizing is started")    \
                                                                             \
   product(uintx, AdaptiveSizePolicyOutputInterval, 0,                       \
           "Collection interval for printing information; zero means never") \
                                                                             \
   product(bool, UseAdaptiveSizePolicyFootprintGoal, true,                   \
           "Use adaptive minimum footprint as a goal")                       \
                                                                             \
   product(uintx, AdaptiveSizePolicyWeight, 10,                              \
           "Weight given to exponential resizing, between 0 and 100")        \
                                                                             \
   product(uintx, AdaptiveTimeWeight,       25,                              \
           "Weight given to time in adaptive policy, between 0 and 100")     \
                                                                             \
   product(uintx, PausePadding, 1,                                           \
           "How much buffer to keep for pause time")                         \
                                                                             \
   product(uintx, PromotedPadding, 3,                                        \
           "How much buffer to keep for promotion failure")                  \
                                                                             \
   product(uintx, SurvivorPadding, 3,                                        \
           "How much buffer to keep for survivor overflow")                  \
                                                                             \
   product(uintx, ThresholdTolerance, 10,                                    \
           "Allowed collection cost difference between generations")         \
                                                                             \
   product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50,                \
           "If collection costs are within margin, reduce both by full "     \
           "delta")                                                          \
                                                                             \
   product(uintx, YoungGenerationSizeIncrement, 20,                          \
           "Adaptive size percentage change in young generation")            \
                                                                             \
   product(uintx, YoungGenerationSizeSupplement, 80,                         \
           "Supplement to YoungedGenerationSizeIncrement used at startup")   \
                                                                             \
   product(uintx, YoungGenerationSizeSupplementDecay, 8,                     \
           "Decay factor to YoungedGenerationSizeSupplement")                \
                                                                             \
   product(uintx, TenuredGenerationSizeIncrement, 20,                        \
           "Adaptive size percentage change in tenured generation")          \
                                                                             \
   product(uintx, TenuredGenerationSizeSupplement, 80,                       \
           "Supplement to TenuredGenerationSizeIncrement used at startup")   \
                                                                             \
   product(uintx, TenuredGenerationSizeSupplementDecay, 2,                   \
           "Decay factor to TenuredGenerationSizeIncrement")                 \
                                                                             \
   product(uintx, MaxGCPauseMillis, max_uintx,                               \
           "Adaptive size policy maximum GC pause time goal in millisecond, "\
           "or (G1 Only) the maximum GC time per MMU time slice")            \
                                                                             \
   product(uintx, GCPauseIntervalMillis, 0,                                  \
           "Time slice for MMU specification")                               \
                                                                             \
   product(uintx, MaxGCMinorPauseMillis, max_uintx,                          \
           "Adaptive size policy maximum GC minor pause time goal "          \
           "in millisecond")                                                 \
                                                                             \
   product(uintx, GCTimeRatio, 99,                                           \
           "Adaptive size policy application time to GC time ratio")         \
                                                                             \
   product(uintx, AdaptiveSizeDecrementScaleFactor, 4,                       \
           "Adaptive size scale down factor for shrinking")                  \
                                                                             \
   product(bool, UseAdaptiveSizeDecayMajorGCCost, true,                      \
           "Adaptive size decays the major cost for long major intervals")   \
                                                                             \
   product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10,                     \
           "Time scale over which major costs decay")                        \
                                                                             \
   product(uintx, MinSurvivorRatio, 3,                                       \
           "Minimum ratio of young generation/survivor space size")          \
                                                                             \
   product(uintx, InitialSurvivorRatio, 8,                                   \
           "Initial ratio of young generation/survivor space size")          \
                                                                             \
   product(uintx, BaseFootPrintEstimate, 256*M,                              \
           "Estimate of footprint other than Java Heap")                     \
                                                                             \
   product(bool, UseGCOverheadLimit, true,                                   \
           "Use policy to limit of proportion of time spent in GC "          \
           "before an OutOfMemory error is thrown")                          \
                                                                             \
   product(uintx, GCTimeLimit, 98,                                           \
           "Limit of the proportion of time spent in GC before "             \
           "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)")      \
                                                                             \
   product(uintx, GCHeapFreeLimit, 2,                                        \
           "Minimum percentage of free space after a full GC before an "     \
           "OutOfMemoryError is thrown (used with GCTimeLimit)")             \
                                                                             \
   develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5,                 \
           "Number of consecutive collections before gc time limit fires")   \
                                                                             \
   product(bool, PrintAdaptiveSizePolicy, false,                             \
           "Print information about AdaptiveSizePolicy")                     \
                                                                             \
   product(intx, PrefetchCopyIntervalInBytes, -1,                            \
           "How far ahead to prefetch destination area (<= 0 means off)")    \
                                                                             \
   product(intx, PrefetchScanIntervalInBytes, -1,                            \
           "How far ahead to prefetch scan area (<= 0 means off)")           \
                                                                             \
   product(intx, PrefetchFieldsAhead, -1,                                    \
           "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
                                                                             \
   diagnostic(bool, VerifySilently, false,                                   \
           "Do not print the verification progress")                         \
                                                                             \
   diagnostic(bool, VerifyDuringStartup, false,                              \
           "Verify memory system before executing any Java code "            \
           "during VM initialization")                                       \
                                                                             \
   diagnostic(bool, VerifyBeforeExit, trueInDebug,                           \
           "Verify system before exiting")                                   \
                                                                             \
   diagnostic(bool, VerifyBeforeGC, false,                                   \
           "Verify memory system before GC")                                 \
                                                                             \
   diagnostic(bool, VerifyAfterGC, false,                                    \
           "Verify memory system after GC")                                  \
                                                                             \
   diagnostic(bool, VerifyDuringGC, false,                                   \
           "Verify memory system during GC (between phases)")                \
                                                                             \
   diagnostic(bool, GCParallelVerificationEnabled, true,                     \
           "Enable parallel memory system verification")                     \
                                                                             \
   diagnostic(bool, DeferInitialCardMark, false,                             \
           "When +ReduceInitialCardMarks, explicitly defer any that "        \
           "may arise from new_pre_store_barrier")                           \
                                                                             \
   diagnostic(bool, VerifyRememberedSets, false,                             \
           "Verify GC remembered sets")                                      \
                                                                             \
   diagnostic(bool, VerifyObjectStartArray, true,                            \
           "Verify GC object start array if verify before/after")            \
                                                                             \
   product(bool, DisableExplicitGC, false,                                   \
           "Ignore calls to System.gc()")                                    \
                                                                             \
   notproduct(bool, CheckMemoryInitialization, false,                        \
           "Check memory initialization")                                    \
                                                                             \
   product(bool, CollectGen0First, false,                                    \
           "Collect youngest generation before each full GC")                \
                                                                             \
   diagnostic(bool, BindCMSThreadToCPU, false,                               \
           "Bind CMS Thread to CPU if possible")                             \
                                                                             \
   diagnostic(uintx, CPUForCMSThread, 0,                                     \
           "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
                                                                             \
   product(bool, BindGCTaskThreadsToCPUs, MIPS64_ONLY(true) NOT_MIPS64(false), \
           "Bind GCTaskThreads to CPUs if possible")                         \
                                                                             \
   product(bool, UseGCTaskAffinity, false,                                   \
           "Use worker affinity when asking for GCTasks")                    \
                                                                             \
   product(uintx, ProcessDistributionStride, 4,                              \
           "Stride through processors when distributing processes")          \
                                                                             \
   product(uintx, CMSCoordinatorYieldSleepCount, 10,                         \
           "Number of times the coordinator GC thread will sleep while "     \
           "yielding before giving up and resuming GC")                      \
                                                                             \
   product(uintx, CMSYieldSleepCount, 0,                                     \
           "Number of times a GC thread (minus the coordinator) "            \
           "will sleep while yielding before giving up and resuming GC")     \
                                                                             \
   /* gc tracing */                                                          \
   manageable(bool, PrintGC, false,                                          \
           "Print message at garbage collection")                            \
                                                                             \
   manageable(bool, PrintGCDetails, false,                                   \
           "Print more details at garbage collection")                       \
                                                                             \
   manageable(bool, PrintGCDateStamps, false,                                \
           "Print date stamps at garbage collection")                        \
                                                                             \
   manageable(bool, PrintGCTimeStamps, false,                                \
           "Print timestamps at garbage collection")                         \
                                                                             \
   product(bool, PrintGCTaskTimeStamps, false,                               \
           "Print timestamps for individual gc worker thread tasks")         \
                                                                             \
   develop(intx, ConcGCYieldTimeout, 0,                                      \
           "If non-zero, assert that GC threads yield within this "          \
           "number of milliseconds")                                         \
                                                                             \
   notproduct(bool, TraceMarkSweep, false,                                   \
           "Trace mark sweep")                                               \
                                                                             \
   product(bool, PrintReferenceGC, false,                                    \
           "Print times spent handling reference objects during GC "         \
           "(enabled only when PrintGCDetails)")                             \
                                                                             \
   develop(bool, TraceReferenceGC, false,                                    \
           "Trace handling of soft/weak/final/phantom references")           \
                                                                             \
   develop(bool, TraceFinalizerRegistration, false,                          \
           "Trace registration of final references")                         \
                                                                             \
   notproduct(bool, TraceScavenge, false,                                    \
           "Trace scavenge")                                                 \
                                                                             \
   product_rw(bool, TraceClassLoading, false,                                \
           "Trace all classes loaded")                                       \
                                                                             \
   product(bool, TraceClassLoadingPreorder, false,                           \
           "Trace all classes loaded in order referenced (not loaded)")      \
                                                                             \
   product_rw(bool, TraceClassUnloading, false,                              \
           "Trace unloading of classes")                                     \
                                                                             \
   product_rw(bool, TraceLoaderConstraints, false,                           \
           "Trace loader constraints")                                       \
                                                                             \
   develop(bool, TraceClassLoaderData, false,                                \
           "Trace class loader loader_data lifetime")                        \
                                                                             \
   product(uintx, InitialBootClassLoaderMetaspaceSize,                       \
           NOT_LP64(2200*K) LP64_ONLY(4*M),                                  \
           "Initial size of the boot class loader data metaspace")           \
                                                                             \
   product(bool, TraceGen0Time, false,                                       \
           "Trace accumulated time for Gen 0 collection")                    \
                                                                             \
   product(bool, TraceGen1Time, false,                                       \
           "Trace accumulated time for Gen 1 collection")                    \
                                                                             \
   product(bool, PrintTenuringDistribution, false,                           \
           "Print tenuring age information")                                 \
                                                                             \
   product_rw(bool, PrintHeapAtGC, false,                                    \
           "Print heap layout before and after each GC")                     \
                                                                             \
   product_rw(bool, PrintHeapAtGCExtended, false,                            \
           "Print extended information about the layout of the heap "        \
           "when -XX:+PrintHeapAtGC is set")                                 \
                                                                             \
   product(bool, PrintHeapAtSIGBREAK, true,                                  \
           "Print heap layout in response to SIGBREAK")                      \
                                                                             \
   manageable(bool, PrintClassHistogramBeforeFullGC, false,                  \
           "Print a class histogram before any major stop-world GC")         \
                                                                             \
   manageable(bool, PrintClassHistogramAfterFullGC, false,                   \
           "Print a class histogram after any major stop-world GC")          \
                                                                             \
   manageable(bool, PrintClassHistogram, false,                              \
           "Print a histogram of class instances")                           \
                                                                             \
   develop(bool, TraceWorkGang, false,                                       \
           "Trace activities of work gangs")                                 \
                                                                             \
   product(bool, TraceParallelOldGCTasks, false,                             \
           "Trace multithreaded GC activity")                                \
                                                                             \
   develop(bool, TraceBlockOffsetTable, false,                               \
           "Print BlockOffsetTable maps")                                    \
                                                                             \
   develop(bool, TraceCardTableModRefBS, false,                              \
           "Print CardTableModRefBS maps")                                   \
                                                                             \
   develop(bool, TraceGCTaskManager, false,                                  \
           "Trace actions of the GC task manager")                           \
                                                                             \
   develop(bool, TraceGCTaskQueue, false,                                    \
           "Trace actions of the GC task queues")                            \
                                                                             \
   diagnostic(bool, TraceGCTaskThread, false,                                \
           "Trace actions of the GC task threads")                           \
                                                                             \
   product(bool, PrintParallelOldGCPhaseTimes, false,                        \
           "Print the time taken by each phase in ParallelOldGC "            \
           "(PrintGCDetails must also be enabled)")                          \
                                                                             \
   develop(bool, TraceParallelOldGCMarkingPhase, false,                      \
           "Trace marking phase in ParallelOldGC")                           \
                                                                             \
   develop(bool, TraceParallelOldGCSummaryPhase, false,                      \
           "Trace summary phase in ParallelOldGC")                           \
                                                                             \
   develop(bool, TraceParallelOldGCCompactionPhase, false,                   \
           "Trace compaction phase in ParallelOldGC")                        \
                                                                             \
   develop(bool, TraceParallelOldGCDensePrefix, false,                       \
           "Trace dense prefix computation for ParallelOldGC")               \
                                                                             \
   develop(bool, IgnoreLibthreadGPFault, false,                              \
           "Suppress workaround for libthread GP fault")                     \
                                                                             \
   product(bool, PrintJNIGCStalls, false,                                    \
           "Print diagnostic message when GC is stalled "                    \
           "by JNI critical section")                                        \
                                                                             \
   experimental(double, ObjectCountCutOffPercent, 0.5,                       \
           "The percentage of the used heap that the instances of a class "  \
           "must occupy for the class to generate a trace event")            \
                                                                             \
   /* GC log rotation setting */                                             \
                                                                             \
   product(bool, UseGCLogFileRotation, false,                                \
           "Rotate gclog files (for long running applications). It requires "\
           "-Xloggc:<filename>")                                             \
                                                                             \
   product(uintx, NumberOfGCLogFiles, 0,                                     \
           "Number of gclog files in rotation "                              \
           "(default: 0, no rotation)")                                      \
                                                                             \
   product(uintx, GCLogFileSize, 8*K,                                        \
           "GC log file size, requires UseGCLogFileRotation. "               \
           "Set to 0 to only trigger rotation via jcmd")                     \
                                                                             \
   /* JVMTI heap profiling */                                                \
                                                                             \
   diagnostic(bool, TraceJVMTIObjectTagging, false,                          \
           "Trace JVMTI object tagging calls")                               \
                                                                             \
   diagnostic(bool, VerifyBeforeIteration, false,                            \
           "Verify memory system before JVMTI iteration")                    \
                                                                             \
   /* compiler interface */                                                  \
                                                                             \
   develop(bool, CIPrintCompilerName, false,                                 \
           "when CIPrint is active, print the name of the active compiler")  \
                                                                             \
   develop(bool, CIPrintCompileQueue, false,                                 \
           "display the contents of the compile queue whenever a "           \
           "compilation is enqueued")                                        \
                                                                             \
   develop(bool, CIPrintRequests, false,                                     \
           "display every request for compilation")                          \
                                                                             \
   product(bool, CITime, false,                                              \
           "collect timing information for compilation")                     \
                                                                             \
   develop(bool, CITimeEach, false,                                          \
           "display timing information after each successful compilation")   \
                                                                             \
   develop(bool, CICountOSR, false,                                          \
           "use a separate counter when assigning ids to osr compilations")  \
                                                                             \
   develop(bool, CICompileNatives, true,                                     \
           "compile native methods if supported by the compiler")            \
                                                                             \
   develop_pd(bool, CICompileOSR,                                            \
           "compile on stack replacement methods if supported by the "       \
           "compiler")                                                       \
                                                                             \
   develop(bool, CIPrintMethodCodes, false,                                  \
           "print method bytecodes of the compiled code")                    \
                                                                             \
   develop(bool, CIPrintTypeFlow, false,                                     \
           "print the results of ciTypeFlow analysis")                       \
                                                                             \
   develop(bool, CITraceTypeFlow, false,                                     \
           "detailed per-bytecode tracing of ciTypeFlow analysis")           \
                                                                             \
   develop(intx, OSROnlyBCI, -1,                                             \
           "OSR only at this bci.  Negative values mean exclude that bci")   \
                                                                             \
   /* compiler */                                                            \
                                                                             \
   product(intx, CICompilerCount, CI_COMPILER_COUNT,                         \
           "Number of compiler threads to run")                              \
                                                                             \
   product(intx, CompilationPolicyChoice, 0,                                 \
           "which compilation policy (0/1)")                                 \
                                                                             \
   develop(bool, UseStackBanging, true,                                      \
           "use stack banging for stack overflow checks (required for "      \
           "proper StackOverflow handling; disable only to measure cost "    \
           "of stackbanging)")                                               \
                                                                             \
   develop(bool, UseStrictFP, true,                                          \
           "use strict fp if modifier strictfp is set")                      \
                                                                             \
   develop(bool, GenerateSynchronizationCode, true,                          \
           "generate locking/unlocking code for synchronized methods and "   \
           "monitors")                                                       \
                                                                             \
   develop(bool, GenerateCompilerNullChecks, true,                           \
           "Generate explicit null checks for loads/stores/calls")           \
                                                                             \
   develop(bool, GenerateRangeChecks, true,                                  \
           "Generate range checks for array accesses")                       \
                                                                             \
   develop_pd(bool, ImplicitNullChecks,                                      \
           "Generate code for implicit null checks")                         \
                                                                             \
   product_pd(bool, TrapBasedNullChecks,                                     \
           "Generate code for null checks that uses a cmp and trap "         \
           "instruction raising SIGTRAP.  This is only used if an access to" \
           "null (+offset) will not raise a SIGSEGV, i.e.,"                  \
           "ImplicitNullChecks don't work (PPC64).")                         \
                                                                             \
   product(bool, PrintSafepointStatistics, false,                            \
           "Print statistics about safepoint synchronization")               \
                                                                             \
   product(intx, PrintSafepointStatisticsCount, 300,                         \
           "Total number of safepoint statistics collected "                 \
           "before printing them out")                                       \
                                                                             \
   product(intx, PrintSafepointStatisticsTimeout,  -1,                       \
           "Print safepoint statistics only when safepoint takes "           \
           "more than PrintSafepointSatisticsTimeout in millis")             \
                                                                             \
   product(bool, TraceSafepointCleanupTime, false,                           \
           "Print the break down of clean up tasks performed during "        \
           "safepoint")                                                      \
                                                                             \
   product(bool, Inline, true,                                               \
           "Enable inlining")                                                \
                                                                             \
   product(bool, ClipInlining, true,                                         \
           "Clip inlining if aggregate method exceeds DesiredMethodLimit")   \
                                                                             \
   develop(bool, UseCHA, true,                                               \
           "Enable CHA")                                                     \
                                                                             \
   product(bool, UseTypeProfile, true,                                       \
           "Check interpreter profile for historically monomorphic calls")   \
                                                                             \
   notproduct(bool, TimeCompiler, false,                                     \
           "Time the compiler")                                              \
                                                                             \
   diagnostic(bool, PrintInlining, false,                                    \
           "Print inlining optimizations")                                   \
                                                                             \
   product(bool, UsePopCountInstruction, false,                              \
           "Use population count instruction")                               \
                                                                             \
   develop(bool, EagerInitialization, false,                                 \
           "Eagerly initialize classes if possible")                         \
                                                                             \
   develop(bool, TraceMethodReplacement, false,                              \
           "Print when methods are replaced do to recompilation")            \
                                                                             \
   develop(bool, PrintMethodFlushing, false,                                 \
           "Print the nmethods being flushed")                               \
                                                                             \
   diagnostic(bool, PrintMethodFlushingStatistics, false,                    \
           "print statistics about method flushing")                         \
                                                                             \
   develop(bool, UseRelocIndex, false,                                       \
           "Use an index to speed random access to relocations")             \
                                                                             \
   develop(bool, StressCodeBuffers, false,                                   \
           "Exercise code buffer expansion and other rare state changes")    \
                                                                             \
   diagnostic(bool, DebugNonSafepoints, trueInDebug,                         \
           "Generate extra debugging information for non-safepoints in "     \
           "nmethods")                                                       \
                                                                             \
   product(bool, PrintVMOptions, false,                                      \
           "Print flags that appeared on the command line")                  \
                                                                             \
   product(bool, IgnoreUnrecognizedVMOptions, false,                         \
           "Ignore unrecognized VM options")                                 \
                                                                             \
   product(bool, PrintCommandLineFlags, false,                               \
           "Print flags specified on command line or set by ergonomics")     \
                                                                             \
   product(bool, PrintFlagsInitial, false,                                   \
           "Print all VM flags before argument processing and exit VM")      \
                                                                             \
   product(bool, PrintFlagsFinal, false,                                     \
           "Print all VM flags after argument and ergonomic processing")     \
                                                                             \
   notproduct(bool, PrintFlagsWithComments, false,                           \
           "Print all VM flags with default values and descriptions and "    \
           "exit")                                                           \
                                                                             \
   diagnostic(bool, SerializeVMOutput, true,                                 \
           "Use a mutex to serialize output to tty and LogFile")             \
                                                                             \
   diagnostic(bool, DisplayVMOutput, true,                                   \
           "Display all VM output on the tty, independently of LogVMOutput") \
                                                                             \
   diagnostic(bool, LogVMOutput, false,                                      \
           "Save VM output to LogFile")                                      \
                                                                             \
   diagnostic(ccstr, LogFile, NULL,                                          \
           "If LogVMOutput or LogCompilation is on, save VM output to "      \
           "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
                                                                             \
   product(ccstr, ErrorFile, NULL,                                           \
           "If an error occurs, save the error data to this file "           \
           "[default: ./hs_err_pid%p.log] (%p replaced with pid)")           \
                                                                             \
   product(bool, DisplayVMOutputToStderr, false,                             \
           "If DisplayVMOutput is true, display all VM output to stderr")    \
                                                                             \
   product(bool, DisplayVMOutputToStdout, false,                             \
           "If DisplayVMOutput is true, display all VM output to stdout")    \
                                                                             \
   product(bool, UseHeavyMonitors, false,                                    \
           "use heavyweight instead of lightweight Java monitors")           \
                                                                             \
   product(bool, PrintStringTableStatistics, false,                          \
           "print statistics about the StringTable and SymbolTable")         \
                                                                             \
   diagnostic(bool, VerifyStringTableAtExit, false,                          \
           "verify StringTable contents at exit")                            \
                                                                             \
   notproduct(bool, PrintSymbolTableSizeHistogram, false,                    \
           "print histogram of the symbol table")                            \
                                                                             \
   notproduct(bool, ExitVMOnVerifyError, false,                              \
           "standard exit from VM if bytecode verify error "                 \
           "(only in debug mode)")                                           \
                                                                             \
   notproduct(ccstr, AbortVMOnException, NULL,                               \
           "Call fatal if this exception is thrown.  Example: "              \
           "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
                                                                             \
   notproduct(ccstr, AbortVMOnExceptionMessage, NULL,                        \
           "Call fatal if the exception pointed by AbortVMOnException "      \
           "has this message")                                               \
                                                                             \
   develop(bool, DebugVtables, false,                                        \
           "add debugging code to vtable dispatch")                          \
                                                                             \
   develop(bool, PrintVtables, false,                                        \
           "print vtables when printing klass")                              \
                                                                             \
   notproduct(bool, PrintVtableStats, false,                                 \
           "print vtables stats at end of run")                              \
                                                                             \
   develop(bool, TraceCreateZombies, false,                                  \
           "trace creation of zombie nmethods")                              \
                                                                             \
   notproduct(bool, IgnoreLockingAssertions, false,                          \
           "disable locking assertions (for speed)")                         \
                                                                             \
   product(bool, RangeCheckElimination, true,                                \
           "Eliminate range checks")                                         \
                                                                             \
   develop_pd(bool, UncommonNullCast,                                        \
           "track occurrences of null in casts; adjust compiler tactics")    \
                                                                             \
   develop(bool, TypeProfileCasts,  true,                                    \
           "treat casts like calls for purposes of type profiling")          \
                                                                             \
   develop(bool, DelayCompilationDuringStartup, true,                        \
           "Delay invoking the compiler until main application class is "    \
           "loaded")                                                         \
                                                                             \
   develop(bool, CompileTheWorld, false,                                     \
           "Compile all methods in all classes in bootstrap class path "     \
           "(stress test)")                                                  \
                                                                             \
   develop(bool, CompileTheWorldPreloadClasses, true,                        \
           "Preload all classes used by a class before start loading")       \
                                                                             \
   notproduct(intx, CompileTheWorldSafepointInterval, 100,                   \
           "Force a safepoint every n compiles so sweeper can keep up")      \
                                                                             \
   develop(bool, FillDelaySlots, true,                                       \
           "Fill delay slots (on SPARC only)")                               \
                                                                             \
   develop(bool, TimeLivenessAnalysis, false,                                \
           "Time computation of bytecode liveness analysis")                 \
                                                                             \
   develop(bool, TraceLivenessGen, false,                                    \
           "Trace the generation of liveness analysis information")          \
                                                                             \
   notproduct(bool, TraceLivenessQuery, false,                               \
           "Trace queries of liveness analysis information")                 \
                                                                             \
   notproduct(bool, CollectIndexSetStatistics, false,                        \
           "Collect information about IndexSets")                            \
                                                                             \
   develop(bool, UseLoopSafepoints, true,                                    \
           "Generate Safepoint nodes in every loop")                         \
                                                                             \
   develop(intx, FastAllocateSizeLimit, 128*K,                               \
           /* Note:  This value is zero mod 1<<13 for a cheap sparc set. */  \
           "Inline allocations larger than this in doublewords must go slow")\
                                                                             \
   product(bool, AggressiveOpts, false,                                      \
           "Enable aggressive optimizations - see arguments.cpp")            \
                                                                             \
   product_pd(uintx, TypeProfileLevel,                                       \
           "=XYZ, with Z: Type profiling of arguments at call; "             \
                      "Y: Type profiling of return value at call; "          \
                      "X: Type profiling of parameters to methods; "         \
           "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods")             \
                                                                             \
   product(intx, TypeProfileArgsLimit,     2,                                \
           "max number of call arguments to consider for type profiling")    \
                                                                             \
   product(intx, TypeProfileParmsLimit,    2,                                \
           "max number of incoming parameters to consider for type profiling"\
           ", -1 for all")                                                   \
                                                                             \
   /* statistics */                                                          \
   develop(bool, CountCompiledCalls, false,                                  \
           "Count method invocations")                                       \
                                                                             \
   notproduct(bool, CountRuntimeCalls, false,                                \
           "Count VM runtime calls")                                         \
                                                                             \
   develop(bool, CountJNICalls, false,                                       \
           "Count jni method invocations")                                   \
                                                                             \
   notproduct(bool, CountJVMCalls, false,                                    \
           "Count jvm method invocations")                                   \
                                                                             \
   notproduct(bool, CountRemovableExceptions, false,                         \
           "Count exceptions that could be replaced by branches due to "     \
           "inlining")                                                       \
                                                                             \
   notproduct(bool, ICMissHistogram, false,                                  \
           "Produce histogram of IC misses")                                 \
                                                                             \
   notproduct(bool, PrintClassStatistics, false,                             \
           "Print class statistics at end of run")                           \
                                                                             \
   notproduct(bool, PrintMethodStatistics, false,                            \
           "Print method statistics at end of run")                          \
                                                                             \
   /* interpreter */                                                         \
   develop(bool, ClearInterpreterLocals, false,                              \
           "Always clear local variables of interpreter activations upon "   \
           "entry")                                                          \
                                                                             \
   product_pd(bool, RewriteBytecodes,                                        \
           "Allow rewriting of bytecodes (bytecodes are not immutable)")     \
                                                                             \
   product_pd(bool, RewriteFrequentPairs,                                    \
           "Rewrite frequently used bytecode pairs into a single bytecode")  \
                                                                             \
   diagnostic(bool, PrintInterpreter, false,                                 \
           "Print the generated interpreter code")                           \
                                                                             \
   product(bool, UseInterpreter, true,                                       \
           "Use interpreter for non-compiled methods")                       \
                                                                             \
   develop(bool, UseFastSignatureHandlers, true,                             \
           "Use fast signature handlers for native calls")                   \
                                                                             \
   product(bool, UseLoopCounter, true,                                       \
           "Increment invocation counter on backward branch")                \
                                                                             \
   product(bool, UseFastEmptyMethods, true,                                  \
           "Use fast method entry code for empty methods")                   \
                                                                             \
   product(bool, UseFastAccessorMethods, true,                               \
           "Use fast method entry code for accessor methods")                \
                                                                             \
   product_pd(bool, UseOnStackReplacement,                                   \
           "Use on stack replacement, calls runtime if invoc. counter "      \
           "overflows in loop")                                              \
                                                                             \
   notproduct(bool, TraceOnStackReplacement, false,                          \
           "Trace on stack replacement")                                     \
                                                                             \
   product_pd(bool, PreferInterpreterNativeStubs,                            \
           "Use always interpreter stubs for native methods invoked via "    \
           "interpreter")                                                    \
                                                                             \
   develop(bool, CountBytecodes, false,                                      \
           "Count number of bytecodes executed")                             \
                                                                             \
   develop(bool, PrintBytecodeHistogram, false,                              \
           "Print histogram of the executed bytecodes")                      \
                                                                             \
   develop(bool, PrintBytecodePairHistogram, false,                          \
           "Print histogram of the executed bytecode pairs")                 \
                                                                             \
   diagnostic(bool, PrintSignatureHandlers, false,                           \
           "Print code generated for native method signature handlers")      \
                                                                             \
   develop(bool, VerifyOops, false,                                          \
           "Do plausibility checks for oops")                                \
                                                                             \
   develop(bool, CheckUnhandledOops, false,                                  \
           "Check for unhandled oops in VM code")                            \
                                                                             \
   develop(bool, VerifyJNIFields, trueInDebug,                               \
           "Verify jfieldIDs for instance fields")                           \
                                                                             \
   notproduct(bool, VerifyJNIEnvThread, false,                               \
           "Verify JNIEnv.thread == Thread::current() when entering VM "     \
           "from JNI")                                                       \
                                                                             \
   develop(bool, VerifyFPU, false,                                           \
           "Verify FPU state (check for NaN's, etc.)")                       \
                                                                             \
   develop(bool, VerifyThread, false,                                        \
           "Watch the thread register for corruption (SPARC only)")          \
                                                                             \
   develop(bool, VerifyActivationFrameSize, false,                           \
           "Verify that activation frame didn't become smaller than its "    \
           "minimal size")                                                   \
                                                                             \
   develop(bool, TraceFrequencyInlining, false,                              \
           "Trace frequency based inlining")                                 \
                                                                             \
   develop_pd(bool, InlineIntrinsics,                                        \
           "Inline intrinsics that can be statically resolved")              \
                                                                             \
   product_pd(bool, ProfileInterpreter,                                      \
           "Profile at the bytecode level during interpretation")            \
                                                                             \
   develop(bool, TraceProfileInterpreter, false,                             \
           "Trace profiling at the bytecode level during interpretation. "   \
           "This outputs the profiling information collected to improve "    \
           "jit compilation.")                                               \
                                                                             \
   develop_pd(bool, ProfileTraps,                                            \
           "Profile deoptimization traps at the bytecode level")             \
                                                                             \
   product(intx, ProfileMaturityPercentage, 20,                              \
           "number of method invocations/branches (expressed as % of "       \
           "CompileThreshold) before using the method's profile")            \
                                                                             \
   develop(bool, PrintMethodData, false,                                     \
           "Print the results of +ProfileInterpreter at end of run")         \
                                                                             \
   develop(bool, VerifyDataPointer, trueInDebug,                             \
           "Verify the method data pointer during interpreter profiling")    \
                                                                             \
   develop(bool, VerifyCompiledCode, false,                                  \
           "Include miscellaneous runtime verifications in nmethod code; "   \
           "default off because it disturbs nmethod size heuristics")        \
                                                                             \
   notproduct(bool, CrashGCForDumpingJavaThread, false,                      \
           "Manually make GC thread crash then dump java stack trace;  "     \
           "Test only")                                                      \
                                                                             \
   /* compilation */                                                         \
   product(bool, UseCompiler, true,                                          \
           "Use Just-In-Time compilation")                                   \
                                                                             \
   develop(bool, TraceCompilationPolicy, false,                              \
           "Trace compilation policy")                                       \
                                                                             \
   develop(bool, TimeCompilationPolicy, false,                               \
           "Time the compilation policy")                                    \
                                                                             \
   product(bool, UseCounterDecay, true,                                      \
           "Adjust recompilation counters")                                  \
                                                                             \
   develop(intx, CounterHalfLifeTime,    30,                                 \
           "Half-life time of invocation counters (in seconds)")             \
                                                                             \
   develop(intx, CounterDecayMinIntervalLength,   500,                       \
           "The minimum interval (in milliseconds) between invocation of "   \
           "CounterDecay")                                                   \
                                                                             \
   product(bool, AlwaysCompileLoopMethods, false,                            \
           "When using recompilation, never interpret methods "              \
           "containing loops")                                               \
                                                                             \
   product(bool, DontCompileHugeMethods, true,                               \
           "Do not compile methods > HugeMethodLimit")                       \
                                                                             \
   /* Bytecode escape analysis estimation. */                                \
   product(bool, EstimateArgEscape, true,                                    \
           "Analyze bytecodes to estimate escape state of arguments")        \
                                                                             \
   product(intx, BCEATraceLevel, 0,                                          \
           "How much tracing to do of bytecode escape analysis estimates")   \
                                                                             \
   product(intx, MaxBCEAEstimateLevel, 5,                                    \
           "Maximum number of nested calls that are analyzed by BC EA")      \
                                                                             \
   product(intx, MaxBCEAEstimateSize, 150,                                   \
           "Maximum bytecode size of a method to be analyzed by BC EA")      \
                                                                             \
   product(intx,  AllocatePrefetchStyle, 1,                                  \
           "0 = no prefetch, "                                               \
           "1 = prefetch instructions for each allocation, "                 \
           "2 = use TLAB watermark to gate allocation prefetch, "            \
           "3 = use BIS instruction on Sparc for allocation prefetch")       \
                                                                             \
   product(intx,  AllocatePrefetchDistance, -1,                              \
           "Distance to prefetch ahead of allocation pointer")               \
                                                                             \
   product(intx,  AllocatePrefetchLines, 3,                                  \
           "Number of lines to prefetch ahead of array allocation pointer")  \
                                                                             \
   product(intx,  AllocateInstancePrefetchLines, 1,                          \
           "Number of lines to prefetch ahead of instance allocation "       \
           "pointer")                                                        \
                                                                             \
   product(intx,  AllocatePrefetchStepSize, 16,                              \
           "Step size in bytes of sequential prefetch instructions")         \
                                                                             \
   product(intx,  AllocatePrefetchInstr, 0,                                  \
           "Prefetch instruction to prefetch ahead of allocation pointer")   \
                                                                             \
   /* deoptimization */                                                      \
   develop(bool, TraceDeoptimization, false,                                 \
           "Trace deoptimization")                                           \
                                                                             \
   develop(bool, DebugDeoptimization, false,                                 \
           "Tracing various information while debugging deoptimization")     \
                                                                             \
   product(intx, SelfDestructTimer, 0,                                       \
           "Will cause VM to terminate after a given time (in minutes) "     \
           "(0 means off)")                                                  \
                                                                             \
   product(intx, MaxJavaStackTraceDepth, 1024,                               \
           "The maximum number of lines in the stack trace for Java "        \
           "exceptions (0 means all)")                                       \
                                                                             \
   NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000,          \
           "Guarantee a safepoint (at least) every so many milliseconds "    \
           "(0 means none)"))                                                \
                                                                             \
   EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0,               \
           "Guarantee a safepoint (at least) every so many milliseconds "    \
           "(0 means none)"))                                                \
                                                                             \
   product(intx, SafepointTimeoutDelay, 10000,                               \
           "Delay in milliseconds for option SafepointTimeout")              \
                                                                             \
   product(intx, NmethodSweepFraction, 16,                                   \
           "Number of invocations of sweeper to cover all nmethods")         \
                                                                             \
   product(intx, NmethodSweepCheckInterval, 5,                               \
           "Compilers wake up every n seconds to possibly sweep nmethods")   \
                                                                             \
   product(intx, NmethodSweepActivity, 10,                                   \
           "Removes cold nmethods from code cache if > 0. Higher values "    \
           "result in more aggressive sweeping")                             \
                                                                             \
   notproduct(bool, LogSweeper, false,                                       \
           "Keep a ring buffer of sweeper activity")                         \
                                                                             \
   notproduct(intx, SweeperLogEntries, 1024,                                 \
           "Number of records in the ring buffer of sweeper activity")       \
                                                                             \
   notproduct(intx, MemProfilingInterval, 500,                               \
           "Time between each invocation of the MemProfiler")                \
                                                                             \
   develop(intx, MallocCatchPtr, -1,                                         \
           "Hit breakpoint when mallocing/freeing this pointer")             \
                                                                             \
   notproduct(intx, AssertRepeat, 1,                                         \
           "number of times to evaluate expression in assert "               \
           "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
                                                                             \
   notproduct(ccstrlist, SuppressErrorAt, "",                                \
           "List of assertions (file:line) to muzzle")                       \
                                                                             \
   notproduct(uintx, HandleAllocationLimit, 1024,                            \
           "Threshold for HandleMark allocation when +TraceHandleAllocation "\
           "is used")                                                        \
                                                                             \
   develop(uintx, TotalHandleAllocationLimit, 1024,                          \
           "Threshold for total handle allocation when "                     \
           "+TraceHandleAllocation is used")                                 \
                                                                             \
   develop(intx, StackPrintLimit, 100,                                       \
           "number of stack frames to print in VM-level stack dump")         \
                                                                             \
   notproduct(intx, MaxElementPrintSize, 256,                                \
           "maximum number of elements to print")                            \
                                                                             \
   notproduct(intx, MaxSubklassPrintSize, 4,                                 \
           "maximum number of subklasses to print when printing klass")      \
                                                                             \
   product(intx, MaxInlineLevel, 9,                                          \
           "maximum number of nested calls that are inlined")                \
                                                                             \
   product(intx, MaxRecursiveInlineLevel, 1,                                 \
           "maximum number of nested recursive calls that are inlined")      \
                                                                             \
   develop(intx, MaxForceInlineLevel, 100,                                   \
           "maximum number of nested calls that are forced for inlining "    \
           "(using CompilerOracle or marked w/ @ForceInline)")               \
                                                                             \
   product_pd(intx, InlineSmallCode,                                         \
           "Only inline already compiled methods if their code size is "     \
           "less than this")                                                 \
                                                                             \
   product(intx, MaxInlineSize, 35,                                          \
           "The maximum bytecode size of a method to be inlined")            \
                                                                             \
   product_pd(intx, FreqInlineSize,                                          \
           "The maximum bytecode size of a frequent method to be inlined")   \
                                                                             \
   product(intx, MaxTrivialSize, 6,                                          \
           "The maximum bytecode size of a trivial method to be inlined")    \
                                                                             \
   product(intx, MinInliningThreshold, 250,                                  \
           "The minimum invocation count a method needs to have to be "      \
           "inlined")                                                        \
                                                                             \
   develop(intx, MethodHistogramCutoff, 100,                                 \
           "The cutoff value for method invocation histogram (+CountCalls)") \
                                                                             \
   develop(intx, ProfilerNumberOfInterpretedMethods, 25,                     \
           "Number of interpreted methods to show in profile")               \
                                                                             \
   develop(intx, ProfilerNumberOfCompiledMethods, 25,                        \
           "Number of compiled methods to show in profile")                  \
                                                                             \
   develop(intx, ProfilerNumberOfStubMethods, 25,                            \
           "Number of stub methods to show in profile")                      \
                                                                             \
   develop(intx, ProfilerNumberOfRuntimeStubNodes, 25,                       \
           "Number of runtime stub nodes to show in profile")                \
                                                                             \
   product(intx, ProfileIntervalsTicks, 100,                                 \
           "Number of ticks between printing of interval profile "           \
           "(+ProfileIntervals)")                                            \
                                                                             \
   notproduct(intx, ScavengeALotInterval,     1,                             \
           "Interval between which scavenge will occur with +ScavengeALot")  \
                                                                             \
   notproduct(intx, FullGCALotInterval,     1,                               \
           "Interval between which full gc will occur with +FullGCALot")     \
                                                                             \
   notproduct(intx, FullGCALotStart,     0,                                  \
           "For which invocation to start FullGCAlot")                       \
                                                                             \
   notproduct(intx, FullGCALotDummies,  32*K,                                \
           "Dummy object allocated with +FullGCALot, forcing all objects "   \
           "to move")                                                        \
                                                                             \
   develop(intx, DontYieldALotInterval,    10,                               \
           "Interval between which yields will be dropped (milliseconds)")   \
                                                                             \
   develop(intx, MinSleepInterval,     1,                                    \
           "Minimum sleep() interval (milliseconds) when "                   \
           "ConvertSleepToYield is off (used for Solaris)")                  \
                                                                             \
   develop(intx, ProfilerPCTickThreshold,    15,                             \
           "Number of ticks in a PC buckets to be a hotspot")                \
                                                                             \
   notproduct(intx, DeoptimizeALotInterval,     5,                           \
           "Number of exits until DeoptimizeALot kicks in")                  \
                                                                             \
   notproduct(intx, ZombieALotInterval,     5,                               \
           "Number of exits until ZombieALot kicks in")                      \
                                                                             \
   diagnostic(intx, MallocVerifyInterval,     0,                             \
           "If non-zero, verify C heap after every N calls to "              \
           "malloc/realloc/free")                                            \
                                                                             \
   diagnostic(intx, MallocVerifyStart,     0,                                \
           "If non-zero, start verifying C heap after Nth call to "          \
           "malloc/realloc/free")                                            \
                                                                             \
   diagnostic(uintx, MallocMaxTestWords,     0,                              \
           "If non-zero, maximum number of words that malloc/realloc can "   \
           "allocate (for testing only)")                                    \
                                                                             \
   product(intx, TypeProfileWidth,     2,                                    \
           "Number of receiver types to record in call/cast profile")        \
                                                                             \
   develop(intx, BciProfileWidth,      2,                                    \
           "Number of return bci's to record in ret profile")                \
                                                                             \
   product(intx, PerMethodRecompilationCutoff, 400,                          \
           "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
                                                                             \
   product(intx, PerBytecodeRecompilationCutoff, 200,                        \
           "Per-BCI limit on repeated recompilation (-1=>'Inf')")            \
                                                                             \
   product(intx, PerMethodTrapLimit,  100,                                   \
           "Limit on traps (of one kind) in a method (includes inlines)")    \
                                                                             \
   experimental(intx, PerMethodSpecTrapLimit,  5000,                         \
           "Limit on speculative traps (of one kind) in a method (includes inlines)") \
                                                                             \
   product(intx, PerBytecodeTrapLimit,  4,                                   \
           "Limit on traps (of one kind) at a particular BCI")               \
                                                                             \
   experimental(intx, SpecTrapLimitExtraEntries,  3,                         \
           "Extra method data trap entries for speculation")                 \
                                                                             \
   develop(intx, InlineFrequencyRatio,    20,                                \
           "Ratio of call site execution to caller method invocation")       \
                                                                             \
   develop_pd(intx, InlineFrequencyCount,                                    \
           "Count of call site execution necessary to trigger frequent "     \
           "inlining")                                                       \
                                                                             \
   develop(intx, InlineThrowCount,    50,                                    \
           "Force inlining of interpreted methods that throw this often")    \
                                                                             \
   develop(intx, InlineThrowMaxSize,   200,                                  \
           "Force inlining of throwing methods smaller than this")           \
                                                                             \
   develop(intx, ProfilerNodeSize,  1024,                                    \
           "Size in K to allocate for the Profile Nodes of each thread")     \
                                                                             \
   product_pd(intx, PreInflateSpin,                                          \
           "Number of times to spin wait before inflation")                  \
                                                                             \
   /* gc parameters */                                                       \
   product(uintx, InitialHeapSize, ScaleForWordSize(MIPS64_ONLY(2500) NOT_MIPS64(0) *M),                 \
           "Initial heap size (in bytes); zero means use ergonomics")        \
                                                                             \
   product(uintx, MaxHeapSize, ScaleForWordSize(MIPS64_ONLY(2500) NOT_MIPS64(96) *M),                     \
           "Maximum heap size (in bytes)")                                   \
                                                                             \
   product(uintx, OldSize, ScaleForWordSize(4*M),                            \
           "Initial tenured generation size (in bytes)")                     \
                                                                             \
   product(uintx, NewSize, ScaleForWordSize(1*M),                            \
           "Initial new generation size (in bytes)")                         \
                                                                             \
   product(uintx, MaxNewSize, max_uintx,                                     \
           "Maximum new generation size (in bytes), max_uintx means set "    \
           "ergonomically")                                                  \
                                                                             \
   product(uintx, PretenureSizeThreshold, 0,                                 \
           "Maximum size in bytes of objects allocated in DefNew "           \
           "generation; zero means no maximum")                              \
                                                                             \
   product(uintx, TLABSize, 0,                                               \
           "Starting TLAB size (in bytes); zero means set ergonomically")    \
                                                                             \
   product(uintx, MinTLABSize, 2*K,                                          \
           "Minimum allowed TLAB size (in bytes)")                           \
                                                                             \
   product(uintx, TLABAllocationWeight, 35,                                  \
           "Allocation averaging weight")                                    \
                                                                             \
   product(uintx, TLABWasteTargetPercent, 1,                                 \
           "Percentage of Eden that can be wasted")                          \
                                                                             \
   product(uintx, TLABRefillWasteFraction,    64,                            \
           "Maximum TLAB waste at a refill (internal fragmentation)")        \
                                                                             \
   product(uintx, TLABWasteIncrement,    4,                                  \
           "Increment allowed waste at slow allocation")                     \
                                                                             \
   product(uintx, SurvivorRatio, 8,                                          \
           "Ratio of eden/survivor space size")                              \
                                                                             \
   product(uintx, NewRatio, 2,                                               \
           "Ratio of old/new generation sizes")                              \
                                                                             \
   product_pd(uintx, NewSizeThreadIncrease,                                  \
           "Additional size added to desired new generation size per "       \
           "non-daemon thread (in bytes)")                                   \
                                                                             \
   product_pd(uintx, MetaspaceSize,                                          \
           "Initial size of Metaspaces (in bytes)")                          \
                                                                             \
   product(uintx, MaxMetaspaceSize, max_uintx,                               \
           "Maximum size of Metaspaces (in bytes)")                          \
                                                                             \
   product(uintx, CompressedClassSpaceSize, 1*G,                             \
           "Maximum size of class area in Metaspace when compressed "        \
           "class pointers are used")                                        \
                                                                             \
   manageable(uintx, MinHeapFreeRatio, 40,                                   \
           "The minimum percentage of heap free after GC to avoid expansion."\
           " For most GCs this applies to the old generation. In G1 and"     \
           " ParallelGC it applies to the whole heap.")                      \
                                                                             \
   manageable(uintx, MaxHeapFreeRatio, 70,                                   \
           "The maximum percentage of heap free after GC to avoid shrinking."\
           " For most GCs this applies to the old generation. In G1 and"     \
           " ParallelGC it applies to the whole heap.")                      \
                                                                             \
   product(intx, SoftRefLRUPolicyMSPerMB, 1000,                              \
           "Number of milliseconds per MB of free space in the heap")        \
                                                                             \
   product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K),                \
           "The minimum change in heap space due to GC (in bytes)")          \
                                                                             \
   product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K),            \
           "The minimum expansion of Metaspace (in bytes)")                  \
                                                                             \
   product(uintx, MinMetaspaceFreeRatio,    40,                              \
           "The minimum percentage of Metaspace free after GC to avoid "     \
           "expansion")                                                      \
                                                                             \
   product(uintx, MaxMetaspaceFreeRatio,    70,                              \
           "The maximum percentage of Metaspace free after GC to avoid "     \
           "shrinking")                                                      \
                                                                             \
   product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M),              \
           "The maximum expansion of Metaspace without full GC (in bytes)")  \
                                                                             \
   product(uintx, QueuedAllocationWarningCount, 0,                           \
           "Number of times an allocation that queues behind a GC "          \
           "will retry before printing a warning")                           \
                                                                             \
   diagnostic(uintx, VerifyGCStartAt,   0,                                   \
           "GC invoke count where +VerifyBefore/AfterGC kicks in")           \
                                                                             \
   diagnostic(intx, VerifyGCLevel,     0,                                    \
           "Generation level at which to start +VerifyBefore/AfterGC")       \
                                                                             \
   product(uintx, MaxTenuringThreshold,    15,                               \
           "Maximum value for tenuring threshold")                           \
                                                                             \
   product(uintx, InitialTenuringThreshold,    7,                            \
           "Initial value for tenuring threshold")                           \
                                                                             \
   product(uintx, TargetSurvivorRatio,    50,                                \
           "Desired percentage of survivor space used after scavenge")       \
                                                                             \
   product(uintx, MarkSweepDeadRatio,     5,                                 \
           "Percentage (0-100) of the old gen allowed as dead wood. "        \
           "Serial mark sweep treats this as both the minimum and maximum "  \
           "value. "                                                         \
           "CMS uses this value only if it falls back to mark sweep. "       \
           "Par compact uses a variable scale based on the density of the "  \
           "generation and treats this as the maximum value when the heap "  \
           "is either completely full or completely empty.  Par compact "    \
           "also has a smaller default value; see arguments.cpp.")           \
                                                                             \
   product(uintx, MarkSweepAlwaysCompactCount,     4,                        \
           "How often should we fully compact the heap (ignoring the dead "  \
           "space parameters)")                                              \
                                                                             \
   product(intx, PrintCMSStatistics, 0,                                      \
           "Statistics for CMS")                                             \
                                                                             \
   product(bool, PrintCMSInitiationStatistics, false,                        \
           "Statistics for initiating a CMS collection")                     \
                                                                             \
   product(intx, PrintFLSStatistics, 0,                                      \
           "Statistics for CMS' FreeListSpace")                              \
                                                                             \
   product(intx, PrintFLSCensus, 0,                                          \
           "Census for CMS' FreeListSpace")                                  \
                                                                             \
   develop(uintx, GCExpandToAllocateDelayMillis, 0,                          \
           "Delay between expansion and allocation (in milliseconds)")       \
                                                                             \
   develop(uintx, GCWorkerDelayMillis, 0,                                    \
           "Delay in scheduling GC workers (in milliseconds)")               \
                                                                             \
   product(intx, DeferThrSuspendLoopCount,     4000,                         \
           "(Unstable) Number of times to iterate in safepoint loop "        \
           "before blocking VM threads ")                                    \
                                                                             \
   product(intx, DeferPollingPageLoopCount,     -1,                          \
           "(Unsafe,Unstable) Number of iterations in safepoint loop "       \
           "before changing safepoint polling page to RO ")                  \
                                                                             \
   product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)")               \
                                                                             \
   product(bool, PSChunkLargeArrays, true,                                   \
           "Process large arrays in chunks")                                 \
                                                                             \
   product(uintx, GCDrainStackTargetSize, 64,                                \
           "Number of entries we will try to leave on the stack "            \
           "during parallel gc")                                             \
                                                                             \
   /* stack parameters */                                                    \
   product_pd(intx, StackYellowPages,                                        \
           "Number of yellow zone (recoverable overflows) pages")            \
                                                                             \
   product_pd(intx, StackRedPages,                                           \
           "Number of red zone (unrecoverable overflows) pages")             \
                                                                             \
   product_pd(intx, StackShadowPages,                                        \
           "Number of shadow zone (for overflow checking) pages "            \
           "this should exceed the depth of the VM and native call stack")   \
                                                                             \
   product_pd(intx, ThreadStackSize,                                         \
           "Thread Stack Size (in Kbytes)")                                  \
                                                                             \
   product_pd(intx, VMThreadStackSize,                                       \
           "Non-Java Thread Stack Size (in Kbytes)")                         \
                                                                             \
   product_pd(intx, CompilerThreadStackSize,                                 \
           "Compiler Thread Stack Size (in Kbytes)")                         \
                                                                             \
   develop_pd(uintx, JVMInvokeMethodSlack,                                   \
           "Stack space (bytes) required for JVM_InvokeMethod to complete")  \
                                                                             \
   product(uintx, ThreadSafetyMargin, 50*M,                                  \
           "Thread safety margin is used on fixed-stack LinuxThreads (on "   \
           "Linux/x86 only) to prevent heap-stack collision. Set to 0 to "   \
           "disable this feature")                                           \
                                                                             \
   /* code cache parameters */                                               \
   /* ppc64 has large code-entry alignment. */                               \
   develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64),                  \
           "Code cache segment size (in bytes) - smallest unit of "          \
           "allocation")                                                     \
                                                                             \
   develop_pd(intx, CodeEntryAlignment,                                      \
           "Code entry alignment for generated code (in bytes)")             \
                                                                             \
   product_pd(intx, OptoLoopAlignment,                                       \
           "Align inner loops to zero relative to this modulus")             \
                                                                             \
   product_pd(uintx, InitialCodeCacheSize,                                   \
           "Initial code cache size (in bytes)")                             \
                                                                             \
   develop_pd(uintx, CodeCacheMinimumUseSpace,                               \
           "Minimum code cache size (in bytes) required to start VM.")       \
                                                                             \
   product_pd(uintx, ReservedCodeCacheSize,                                  \
           "Reserved code cache size (in bytes) - maximum code cache size")  \
                                                                             \
   product(uintx, CodeCacheMinimumFreeSpace, 500*K,                          \
           "When less than X space left, we stop compiling")                 \
                                                                             \
   product_pd(uintx, CodeCacheExpansionSize,                                 \
           "Code cache expansion size (in bytes)")                           \
                                                                             \
   develop_pd(uintx, CodeCacheMinBlockLength,                                \
           "Minimum number of segments in a code cache block")               \
                                                                             \
   notproduct(bool, ExitOnFullCodeCache, false,                              \
           "Exit the VM if we fill the code cache")                          \
                                                                             \
   product(bool, UseCodeCacheFlushing, true,                                 \
           "Remove cold/old nmethods from the code cache")                   \
                                                                             \
   /* interpreter debugging */                                               \
   develop(intx, BinarySwitchThreshold, 5,                                   \
           "Minimal number of lookupswitch entries for rewriting to binary " \
           "switch")                                                         \
                                                                             \
   develop(intx, StopInterpreterAt, 0,                                       \
           "Stop interpreter execution at specified bytecode number")        \
                                                                             \
   develop(intx, TraceBytecodesAt, 0,                                        \
           "Trace bytecodes starting with specified bytecode number")        \
                                                                             \
   /* compiler interface */                                                  \
   develop(intx, CIStart, 0,                                                 \
           "The id of the first compilation to permit")                      \
                                                                             \
   develop(intx, CIStop, max_jint,                                           \
           "The id of the last compilation to permit")                       \
                                                                             \
   develop(intx, CIStartOSR, 0,                                              \
           "The id of the first osr compilation to permit "                  \
           "(CICountOSR must be on)")                                        \
                                                                             \
   develop(intx, CIStopOSR, max_jint,                                        \
           "The id of the last osr compilation to permit "                   \
           "(CICountOSR must be on)")                                        \
                                                                             \
   develop(intx, CIBreakAtOSR, -1,                                           \
           "The id of osr compilation to break at")                          \
                                                                             \
   develop(intx, CIBreakAt, -1,                                              \
           "The id of compilation to break at")                              \
                                                                             \
   product(ccstrlist, CompileOnly, "",                                       \
           "List of methods (pkg/class.name) to restrict compilation to")    \
                                                                             \
   product(ccstr, CompileCommandFile, NULL,                                  \
           "Read compiler commands from this file [.hotspot_compiler]")      \
                                                                             \
   product(ccstrlist, CompileCommand, "",                                    \
           "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
                                                                             \
   develop(bool, ReplayCompiles, false,                                      \
           "Enable replay of compilations from ReplayDataFile")              \
                                                                             \
   product(ccstr, ReplayDataFile, NULL,                                      \
           "File containing compilation replay information"                  \
           "[default: ./replay_pid%p.log] (%p replaced with pid)")           \
                                                                             \
    product(ccstr, InlineDataFile, NULL,                                     \
           "File containing inlining replay information"                     \
           "[default: ./inline_pid%p.log] (%p replaced with pid)")           \
                                                                             \
   develop(intx, ReplaySuppressInitializers, 2,                              \
           "Control handling of class initialization during replay: "        \
           "0 - don't do anything special; "                                 \
           "1 - treat all class initializers as empty; "                     \
           "2 - treat class initializers for application classes as empty; " \
           "3 - allow all class initializers to run during bootstrap but "   \
           "    pretend they are empty after starting replay")               \
                                                                             \
   develop(bool, ReplayIgnoreInitErrors, false,                              \
           "Ignore exceptions thrown during initialization for replay")      \
                                                                             \
   product(bool, DumpReplayDataOnError, true,                                \
           "Record replay data for crashing compiler threads")               \
                                                                             \
   product(bool, CICompilerCountPerCPU, false,                               \
           "1 compiler thread for log(N CPUs)")                              \
                                                                             \
   develop(intx, CIFireOOMAt,    -1,                                         \
           "Fire OutOfMemoryErrors throughout CI for testing the compiler "  \
           "(non-negative value throws OOM after this many CI accesses "     \
           "in each compile)")                                               \
   notproduct(intx, CICrashAt, -1,                                           \
           "id of compilation to trigger assert in compiler thread for "     \
           "the purpose of testing, e.g. generation of replay data")         \
   notproduct(bool, CIObjectFactoryVerify, false,                            \
           "enable potentially expensive verification in ciObjectFactory")   \
                                                                             \
   /* Priorities */                                                          \
   product_pd(bool, UseThreadPriorities,  "Use native thread priorities")    \
                                                                             \
   product(intx, ThreadPriorityPolicy, 0,                                    \
           "0 : Normal.                                                     "\
           "    VM chooses priorities that are appropriate for normal       "\
           "    applications. On Solaris NORM_PRIORITY and above are mapped "\
           "    to normal native priority. Java priorities below "           \
           "    NORM_PRIORITY map to lower native priority values. On       "\
           "    Windows applications are allowed to use higher native       "\
           "    priorities. However, with ThreadPriorityPolicy=0, VM will   "\
           "    not use the highest possible native priority,               "\
           "    THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with     "\
           "    system threads. On Linux thread priorities are ignored      "\
           "    because the OS does not support static priority in          "\
           "    SCHED_OTHER scheduling class which is the only choice for   "\
           "    non-root, non-realtime applications.                        "\
           "1 : Aggressive.                                                 "\
           "    Java thread priorities map over to the entire range of      "\
           "    native thread priorities. Higher Java thread priorities map "\
           "    to higher native thread priorities. This policy should be   "\
           "    used with care, as sometimes it can cause performance       "\
           "    degradation in the application and/or the entire system. On "\
           "    Linux this policy requires root privilege.")                 \
                                                                             \
   product(bool, ThreadPriorityVerbose, false,                               \
           "Print priority changes")                                         \
                                                                             \
   product(intx, DefaultThreadPriority, -1,                                  \
           "The native priority at which threads run if not elsewhere "      \
           "specified (-1 means no change)")                                 \
                                                                             \
   product(intx, CompilerThreadPriority, -1,                                 \
           "The native priority at which compiler threads should run "       \
           "(-1 means no change)")                                           \
                                                                             \
   product(intx, VMThreadPriority, -1,                                       \
           "The native priority at which the VM thread should run "          \
           "(-1 means no change)")                                           \
                                                                             \
   product(bool, CompilerThreadHintNoPreempt, true,                          \
           "(Solaris only) Give compiler threads an extra quanta")           \
                                                                             \
   product(bool, VMThreadHintNoPreempt, false,                               \
           "(Solaris only) Give VM thread an extra quanta")                  \
                                                                             \
   product(intx, JavaPriority1_To_OSPriority, -1,                            \
           "Map Java priorities to OS priorities")                           \
                                                                             \
   product(intx, JavaPriority2_To_OSPriority, -1,                            \
           "Map Java priorities to OS priorities")                           \
                                                                             \
   product(intx, JavaPriority3_To_OSPriority, -1,                            \
           "Map Java priorities to OS priorities")                           \
                                                                             \
   product(intx, JavaPriority4_To_OSPriority, -1,                            \
           "Map Java priorities to OS priorities")                           \
                                                                             \
   product(intx, JavaPriority5_To_OSPriority, -1,                            \
           "Map Java priorities to OS priorities")                           \
                                                                             \
   product(intx, JavaPriority6_To_OSPriority, -1,                            \
           "Map Java priorities to OS priorities")                           \
                                                                             \
   product(intx, JavaPriority7_To_OSPriority, -1,                            \
           "Map Java priorities to OS priorities")                           \
                                                                             \
   product(intx, JavaPriority8_To_OSPriority, -1,                            \
           "Map Java priorities to OS priorities")                           \
                                                                             \
   product(intx, JavaPriority9_To_OSPriority, -1,                            \
           "Map Java priorities to OS priorities")                           \
                                                                             \
   product(intx, JavaPriority10_To_OSPriority,-1,                            \
           "Map Java priorities to OS priorities")                           \
                                                                             \
   experimental(bool, UseCriticalJavaThreadPriority, false,                  \
           "Java thread priority 10 maps to critical scheduling priority")   \
                                                                             \
   experimental(bool, UseCriticalCompilerThreadPriority, false,              \
           "Compiler thread(s) run at critical scheduling priority")         \
                                                                             \
   experimental(bool, UseCriticalCMSThreadPriority, false,                   \
           "ConcurrentMarkSweep thread runs at critical scheduling priority")\
                                                                             \
   /* compiler debugging */                                                  \
   notproduct(intx, CompileTheWorldStartAt,     1,                           \
           "First class to consider when using +CompileTheWorld")            \
                                                                             \
   notproduct(intx, CompileTheWorldStopAt, max_jint,                         \
           "Last class to consider when using +CompileTheWorld")             \
                                                                             \
   develop(intx, NewCodeParameter,      0,                                   \
           "Testing Only: Create a dedicated integer parameter before "      \
           "putback")                                                        \
                                                                             \
   /* new oopmap storage allocation */                                       \
   develop(intx, MinOopMapAllocation,     8,                                 \
           "Minimum number of OopMap entries in an OopMapSet")               \
                                                                             \
   /* Background Compilation */                                              \
   develop(intx, LongCompileThreshold,     50,                               \
           "Used with +TraceLongCompiles")                                   \
                                                                             \
   product(intx, StarvationMonitorInterval,    200,                          \
           "Pause between each check (in milliseconds)")                     \
                                                                             \
   /* recompilation */                                                       \
   product_pd(intx, CompileThreshold,                                        \
           "number of interpreted method invocations before (re-)compiling") \
                                                                             \
   product_pd(intx, BackEdgeThreshold,                                       \
           "Interpreter Back edge threshold at which an OSR compilation is " \
           "invoked")                                                        \
                                                                             \
   product(intx, Tier0InvokeNotifyFreqLog, 7,                                \
           "Interpreter (tier 0) invocation notification frequency")         \
                                                                             \
   product(intx, Tier2InvokeNotifyFreqLog, 11,                               \
           "C1 without MDO (tier 2) invocation notification frequency")      \
                                                                             \
   product(intx, Tier3InvokeNotifyFreqLog, 10,                               \
           "C1 with MDO profiling (tier 3) invocation notification "         \
           "frequency")                                                      \
                                                                             \
   product(intx, Tier23InlineeNotifyFreqLog, 20,                             \
           "Inlinee invocation (tiers 2 and 3) notification frequency")      \
                                                                             \
   product(intx, Tier0BackedgeNotifyFreqLog, 10,                             \
           "Interpreter (tier 0) invocation notification frequency")         \
                                                                             \
   product(intx, Tier2BackedgeNotifyFreqLog, 14,                             \
           "C1 without MDO (tier 2) invocation notification frequency")      \
                                                                             \
   product(intx, Tier3BackedgeNotifyFreqLog, 13,                             \
           "C1 with MDO profiling (tier 3) invocation notification "         \
           "frequency")                                                      \
                                                                             \
   product(intx, Tier2CompileThreshold, 0,                                   \
           "threshold at which tier 2 compilation is invoked")               \
                                                                             \
   product(intx, Tier2BackEdgeThreshold, 0,                                  \
           "Back edge threshold at which tier 2 compilation is invoked")     \
                                                                             \
   product(intx, Tier3InvocationThreshold, 200,                              \
           "Compile if number of method invocations crosses this "           \
           "threshold")                                                      \
                                                                             \
   product(intx, Tier3MinInvocationThreshold, 100,                           \
           "Minimum invocation to compile at tier 3")                        \
                                                                             \
   product(intx, Tier3CompileThreshold, 2000,                                \
           "Threshold at which tier 3 compilation is invoked (invocation "   \
           "minimum must be satisfied")                                      \
                                                                             \
   product(intx, Tier3BackEdgeThreshold,  60000,                             \
           "Back edge threshold at which tier 3 OSR compilation is invoked") \
                                                                             \
   product(intx, Tier4InvocationThreshold, 5000,                             \
           "Compile if number of method invocations crosses this "           \
           "threshold")                                                      \
                                                                             \
   product(intx, Tier4MinInvocationThreshold, 600,                           \
           "Minimum invocation to compile at tier 4")                        \
                                                                             \
   product(intx, Tier4CompileThreshold, 15000,                               \
           "Threshold at which tier 4 compilation is invoked (invocation "   \
           "minimum must be satisfied")                                      \
                                                                             \
   product(intx, Tier4BackEdgeThreshold, 40000,                              \
           "Back edge threshold at which tier 4 OSR compilation is invoked") \
                                                                             \
   product(intx, Tier3DelayOn, 5,                                            \
           "If C2 queue size grows over this amount per compiler thread "    \
           "stop compiling at tier 3 and start compiling at tier 2")         \
                                                                             \
   product(intx, Tier3DelayOff, 2,                                           \
           "If C2 queue size is less than this amount per compiler thread "  \
           "allow methods compiled at tier 2 transition to tier 3")          \
                                                                             \
   product(intx, Tier3LoadFeedback, 5,                                       \
           "Tier 3 thresholds will increase twofold when C1 queue size "     \
           "reaches this amount per compiler thread")                        \
                                                                             \
   product(intx, Tier4LoadFeedback, 3,                                       \
           "Tier 4 thresholds will increase twofold when C2 queue size "     \
           "reaches this amount per compiler thread")                        \
                                                                             \
   product(intx, TieredCompileTaskTimeout, 50,                               \
           "Kill compile task if method was not used within "                \
           "given timeout in milliseconds")                                  \
                                                                             \
   product(intx, TieredStopAtLevel, 4,                                       \
           "Stop at given compilation level")                                \
                                                                             \
   product(intx, Tier0ProfilingStartPercentage, 200,                         \
           "Start profiling in interpreter if the counters exceed tier 3 "   \
           "thresholds by the specified percentage")                         \
                                                                             \
   product(uintx, IncreaseFirstTierCompileThresholdAt, 50,                   \
           "Increase the compile threshold for C1 compilation if the code "  \
           "cache is filled by the specified percentage")                    \
                                                                             \
   product(intx, TieredRateUpdateMinTime, 1,                                 \
           "Minimum rate sampling interval (in milliseconds)")               \
                                                                             \
   product(intx, TieredRateUpdateMaxTime, 25,                                \
           "Maximum rate sampling interval (in milliseconds)")               \
                                                                             \
   product_pd(bool, TieredCompilation,                                       \
           "Enable tiered compilation")                                      \
                                                                             \
   product(bool, PrintTieredEvents, false,                                   \
           "Print tiered events notifications")                              \
                                                                             \
   product_pd(intx, OnStackReplacePercentage,                                \
           "NON_TIERED number of method invocations/branches (expressed as " \
           "% of CompileThreshold) before (re-)compiling OSR code")          \
                                                                             \
   product(intx, InterpreterProfilePercentage, 33,                           \
           "NON_TIERED number of method invocations/branches (expressed as " \
           "% of CompileThreshold) before profiling in the interpreter")     \
                                                                             \
   develop(intx, MaxRecompilationSearchLength,    10,                        \
           "The maximum number of frames to inspect when searching for "     \
           "recompilee")                                                     \
                                                                             \
   develop(intx, MaxInterpretedSearchLength,     3,                          \
           "The maximum number of interpreted frames to skip when searching "\
           "for recompilee")                                                 \
                                                                             \
   develop(intx, DesiredMethodLimit,  8000,                                  \
           "The desired maximum method size (in bytecodes) after inlining")  \
                                                                             \
   develop(intx, HugeMethodLimit,  8000,                                     \
           "Don't compile methods larger than this if "                      \
           "+DontCompileHugeMethods")                                        \
                                                                             \
   /* New JDK 1.4 reflection implementation */                               \
                                                                             \
   develop(bool, UseNewReflection, true,                                     \
           "Temporary flag for transition to reflection based on dynamic "   \
           "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
           "JDK, and is unneeded in 1.3 JDK, but marks most places VM "      \
           "changes were needed")                                            \
                                                                             \
   develop(bool, VerifyReflectionBytecodes, false,                           \
           "Force verification of 1.4 reflection bytecodes. Does not work "  \
           "in situations like that described in 4486457 or for "            \
           "constructors generated for serialization, so can not be enabled "\
           "in product.")                                                    \
                                                                             \
   product(bool, ReflectionWrapResolutionErrors, true,                       \
           "Temporary flag for transition to AbstractMethodError wrapped "   \
           "in InvocationTargetException. See 6531596")                      \
                                                                             \
   develop(intx, FastSuperclassLimit, 8,                                     \
           "Depth of hardwired instanceof accelerator array")                \
                                                                             \
   /* Properties for Java libraries  */                                      \
                                                                             \
   product(uintx, MaxDirectMemorySize, 0,                                    \
           "Maximum total size of NIO direct-buffer allocations")            \
                                                                             \
   /* temporary developer defined flags  */                                  \
                                                                             \
   diagnostic(bool, UseNewCode, false,                                       \
           "Testing Only: Use the new version while testing")                \
                                                                             \
   diagnostic(bool, UseNewCode2, false,                                      \
           "Testing Only: Use the new version while testing")                \
                                                                             \
   diagnostic(bool, UseNewCode3, false,                                      \
           "Testing Only: Use the new version while testing")                \
                                                                             \
   /* flags for performance data collection */                               \
                                                                             \
   product(bool, UsePerfData, falseInEmbedded,                               \
           "Flag to disable jvmstat instrumentation for performance testing "\
           "and problem isolation purposes")                                 \
                                                                             \
   product(bool, PerfDataSaveToFile, false,                                  \
           "Save PerfData memory to hsperfdata_<pid> file on exit")          \
                                                                             \
   product(ccstr, PerfDataSaveFile, NULL,                                    \
           "Save PerfData memory to the specified absolute pathname. "       \
           "The string %p in the file name (if present) "                    \
           "will be replaced by pid")                                        \
                                                                             \
   product(intx, PerfDataSamplingInterval, 50,                               \
           "Data sampling interval (in milliseconds)")                       \
                                                                             \
   develop(bool, PerfTraceDataCreation, false,                               \
           "Trace creation of Performance Data Entries")                     \
                                                                             \
   develop(bool, PerfTraceMemOps, false,                                     \
           "Trace PerfMemory create/attach/detach calls")                    \
                                                                             \
   product(bool, PerfDisableSharedMem, false,                                \
           "Store performance data in standard memory")                      \
                                                                             \
   product(intx, PerfDataMemorySize, 32*K,                                   \
           "Size of performance data memory region. Will be rounded "        \
           "up to a multiple of the native os page size.")                   \
                                                                             \
   product(intx, PerfMaxStringConstLength, 1024,                             \
           "Maximum PerfStringConstant string length before truncation")     \
                                                                             \
   product(bool, PerfAllowAtExitRegistration, false,                         \
           "Allow registration of atexit() methods")                         \
                                                                             \
   product(bool, PerfBypassFileSystemCheck, false,                           \
           "Bypass Win32 file system criteria checks (Windows Only)")        \
                                                                             \
   product(intx, UnguardOnExecutionViolation, 0,                             \
           "Unguard page and retry on no-execute fault (Win32 only) "        \
           "0=off, 1=conservative, 2=aggressive")                            \
                                                                             \
   /* Serviceability Support */                                              \
                                                                             \
   product(bool, ManagementServer, false,                                    \
           "Create JMX Management Server")                                   \
                                                                             \
   product(bool, DisableAttachMechanism, false,                              \
           "Disable mechanism that allows tools to attach to this VM")       \
                                                                             \
   product(bool, StartAttachListener, false,                                 \
           "Always start Attach Listener at VM startup")                     \
                                                                             \
   manageable(bool, PrintConcurrentLocks, false,                             \
           "Print java.util.concurrent locks in thread dump")                \
                                                                             \
   product(bool, TransmitErrorReport, false,                                 \
           "Enable error report transmission on erroneous termination")      \
                                                                             \
   product(ccstr, ErrorReportServer, NULL,                                   \
           "Override built-in error report server address")                  \
                                                                             \
   /* Shared spaces */                                                       \
                                                                             \
   product(bool, UseSharedSpaces, true,                                      \
           "Use shared spaces for metadata")                                 \
                                                                             \
   product(bool, VerifySharedSpaces, false,                                  \
           "Verify shared spaces (false for default archive, true for "      \
           "archive specified by -XX:SharedArchiveFile)")                    \
                                                                             \
   product(bool, RequireSharedSpaces, false,                                 \
           "Require shared spaces for metadata")                             \
                                                                             \
   product(bool, DumpSharedSpaces, false,                                    \
           "Special mode: JVM reads a class list, loads classes, builds "    \
           "shared spaces, and dumps the shared spaces to a file to be "     \
           "used in future JVM runs")                                        \
                                                                             \
   product(bool, PrintSharedSpaces, false,                                   \
           "Print usage of shared spaces")                                   \
                                                                             \
   product(uintx, SharedReadWriteSize,  NOT_LP64(12*M) LP64_ONLY(16*M),      \
           "Size of read-write space for metadata (in bytes)")               \
                                                                             \
   product(uintx, SharedReadOnlySize,  NOT_LP64(12*M) LP64_ONLY(16*M),       \
           "Size of read-only space for metadata (in bytes)")                \
                                                                             \
   product(uintx, SharedMiscDataSize,    NOT_LP64(2*M) LP64_ONLY(4*M),       \
           "Size of the shared miscellaneous data area (in bytes)")          \
                                                                             \
   product(uintx, SharedMiscCodeSize,    120*K,                              \
           "Size of the shared miscellaneous code area (in bytes)")          \
                                                                             \
   product(uintx, SharedBaseAddress, LP64_ONLY(32*G)                         \
           NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)),                           \
           "Address to allocate shared memory region for class data")        \
                                                                             \
   diagnostic(bool, EnableInvokeDynamic, true,                               \
           "support JSR 292 (method handles, invokedynamic, "                \
           "anonymous classes")                                              \
                                                                             \
   diagnostic(bool, PrintMethodHandleStubs, false,                           \
           "Print generated stub code for method handles")                   \
                                                                             \
   develop(bool, TraceMethodHandles, false,                                  \
           "trace internal method handle operations")                        \
                                                                             \
   diagnostic(bool, VerifyMethodHandles, trueInDebug,                        \
           "perform extra checks when constructing method handles")          \
                                                                             \
   diagnostic(bool, ShowHiddenFrames, false,                                 \
           "show method handle implementation frames (usually hidden)")      \
                                                                             \
   experimental(bool, TrustFinalNonStaticFields, false,                      \
           "trust final non-static declarations for constant folding")       \
                                                                             \
   diagnostic(bool, FoldStableValues, true,                                  \
           "Optimize loads from stable fields (marked w/ @Stable)")          \
                                                                             \
   develop(bool, TraceInvokeDynamic, false,                                  \
           "trace internal invoke dynamic operations")                       \
                                                                             \
   diagnostic(bool, PauseAtStartup,      false,                              \
           "Causes the VM to pause at startup time and wait for the pause "  \
           "file to be removed (default: ./vm.paused.<pid>)")                \
                                                                             \
   diagnostic(ccstr, PauseAtStartupFile, NULL,                               \
           "The file to create and for whose removal to await when pausing " \
           "at startup. (default: ./vm.paused.<pid>)")                       \
                                                                             \
   diagnostic(bool, PauseAtExit, false,                                      \
           "Pause and wait for keypress on exit if a debugger is attached")  \
                                                                             \
   product(bool, ExtendedDTraceProbes,    false,                             \
           "Enable performance-impacting dtrace probes")                     \
                                                                             \
   product(bool, DTraceMethodProbes, false,                                  \
           "Enable dtrace probes for method-entry and method-exit")          \
                                                                             \
   product(bool, DTraceAllocProbes, false,                                   \
           "Enable dtrace probes for object allocation")                     \
                                                                             \
   product(bool, DTraceMonitorProbes, false,                                 \
           "Enable dtrace probes for monitor events")                        \
                                                                             \
   product(bool, RelaxAccessControlCheck, false,                             \
           "Relax the access control checks in the verifier")                \
                                                                             \
   diagnostic(bool, PrintDTraceDOF, false,                                   \
           "Print the DTrace DOF passed to the system for JSDT probes")      \
                                                                             \
   product(uintx, StringTableSize, defaultStringTableSize,                   \
           "Number of buckets in the interned String table")                 \
                                                                             \
   experimental(uintx, SymbolTableSize, defaultSymbolTableSize,              \
           "Number of buckets in the JVM internal Symbol table")             \
                                                                             \
   product(bool, UseStringDeduplication, false,                              \
           "Use string deduplication")                                       \
                                                                             \
   product(bool, PrintStringDeduplicationStatistics, false,                  \
           "Print string deduplication statistics")                          \
                                                                             \
   product(uintx, StringDeduplicationAgeThreshold, 3,                        \
           "A string must reach this age (or be promoted to an old region) " \
           "to be considered for deduplication")                             \
                                                                             \
   diagnostic(bool, StringDeduplicationResizeALot, false,                    \
           "Force table resize every time the table is scanned")             \
                                                                             \
   diagnostic(bool, StringDeduplicationRehashALot, false,                    \
           "Force table rehash every time the table is scanned")             \
                                                                             \
   develop(bool, TraceDefaultMethods, false,                                 \
           "Trace the default method processing steps")                      \
                                                                             \
   develop(bool, VerifyGenericSignatures, false,                             \
           "Abort VM on erroneous or inconsistent generic signatures")       \
                                                                             \
   product(bool, UseVMInterruptibleIO, false,                                \
           "(Unstable, Solaris-specific) Thread interrupt before or with "   \
           "EINTR for I/O operations results in OS_INTRPT. The default "     \
           "value of this flag is true for JDK 6 and earlier")               \
                                                                             \
   diagnostic(bool, WhiteBoxAPI, false,                                      \
           "Enable internal testing APIs")                                   \
                                                                             \
   product(bool, PrintGCCause, true,                                         \
           "Include GC cause in GC logging")                                 \
                                                                             \
   product(bool , AllowNonVirtualCalls, false,                               \
           "Obey the ACC_SUPER flag and allow invokenonvirtual calls")       \
                                                                             \
   diagnostic(ccstr, SharedArchiveFile, NULL,                                \
           "Override the default location of the CDS archive file")          \
                                                                             \
   experimental(uintx, ArrayAllocatorMallocLimit,                            \
           SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx),                        \
           "Allocation less than this value will be allocated "              \
           "using malloc. Larger allocations will use mmap.")                \
                                                                             \
   product(bool, EnableTracing, false,                                       \
           "Enable event-based tracing")                                     \
                                                                             \
   product(bool, UseLockedTracing, false,                                    \
           "Use locked-tracing when doing event-based tracing")
 /*
  *  Macros for factoring of globals
  */
 // Interface macros
 #define DECLARE_PRODUCT_FLAG(type, name, value, doc)      extern "C" type name;
 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc)          extern "C" type name;
 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc)   extern "C" type name;
 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc)   extern "C" type name;
 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc)   extern "C" type name;
 #ifdef PRODUCT
 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type CONST_##name; const type name = value;
 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type CONST_##name; const type name = pd_##name;
 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type CONST_##name;
 #else
 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type name;
 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type name;
 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type name;
 #endif
 // Special LP64 flags, product only needed for now.
 #ifdef _LP64
 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
 #else
 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
 #endif // _LP64
 // Implementation macros
 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc)      type name = value;
 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc)          type name = pd_##name;
 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc)   type name = value;
 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc)   type name = value;
 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc)   type name = value;
 #ifdef PRODUCT
 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type CONST_##name = value;
 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type CONST_##name = pd_##name;
 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type CONST_##name = value;
 #else
 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type name = value;
 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type name = pd_##name;
 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type name = value;
 #endif
 #ifdef _LP64
 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
 #else
 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
 #endif // _LP64
 RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG)
 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
 // Extensions
 #include "runtime/globals_ext.hpp"
 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/runtime/globals.hpp@2d8a650513c2 (annotated)

src/share/vm/runtime/globals.hpp