jdk8-mips64-public/hotspot: src/share/vm/runtime/globals.cpp@427b2fb1944f (annotated)

src/share/vm/runtime/globals.cpp@427b2fb1944f (annotated)

src/share/vm/runtime/globals.cpp

Wed, 31 Jan 2018 19:24:57 -0500

author: dbuck
date: Wed, 31 Jan 2018 19:24:57 -0500
changeset 9289: 427b2fb1944f
parent 7282: 46140919bf90
child 7535: 7ae4e26cb1e0
child 9858: b985cbb00e68
permissions: -rw-r--r--

8189170: Add option to disable stack overflow checking in primordial thread for use with JNI_CreateJavaJVM
Reviewed-by: dcubed

 /*
  * 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.
  *
  */
 #include "precompiled.hpp"
 #include "memory/allocation.inline.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/globals.hpp"
 #include "runtime/globals_extension.hpp"
 #include "utilities/ostream.hpp"
 #include "utilities/macros.hpp"
 #include "utilities/top.hpp"
 #include "trace/tracing.hpp"
 #if INCLUDE_ALL_GCS
 #include "gc_implementation/g1/g1_globals.hpp"
 #endif // INCLUDE_ALL_GCS
 #ifdef COMPILER1
 #include "c1/c1_globals.hpp"
 #endif
 #ifdef COMPILER2
 #include "opto/c2_globals.hpp"
 #endif
 #ifdef SHARK
 #include "shark/shark_globals.hpp"
 #endif
 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
               MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
               MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
               MATERIALIZE_NOTPRODUCT_FLAG, \
               MATERIALIZE_MANAGEABLE_FLAG, MATERIALIZE_PRODUCT_RW_FLAG, \
               MATERIALIZE_LP64_PRODUCT_FLAG)
 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
                  MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
                  MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG)
 ARCH_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PRODUCT_FLAG, \
            MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
            MATERIALIZE_NOTPRODUCT_FLAG)
 MATERIALIZE_FLAGS_EXT
 static bool is_product_build() {
 #ifdef PRODUCT
   return true;
 #else
   return false;
 #endif
 }
 void Flag::check_writable() {
   if (is_constant_in_binary()) {
     fatal(err_msg("flag is constant: %s", _name));
   }
 }
 bool Flag::is_bool() const {
   return strcmp(_type, "bool") == 0;
 }
 bool Flag::get_bool() const {
   return *((bool*) _addr);
 }
 void Flag::set_bool(bool value) {
   check_writable();
   *((bool*) _addr) = value;
 }
 bool Flag::is_intx() const {
   return strcmp(_type, "intx")  == 0;
 }
 intx Flag::get_intx() const {
   return *((intx*) _addr);
 }
 void Flag::set_intx(intx value) {
   check_writable();
   *((intx*) _addr) = value;
 }
 bool Flag::is_uintx() const {
   return strcmp(_type, "uintx") == 0;
 }
 uintx Flag::get_uintx() const {
   return *((uintx*) _addr);
 }
 void Flag::set_uintx(uintx value) {
   check_writable();
   *((uintx*) _addr) = value;
 }
 bool Flag::is_uint64_t() const {
   return strcmp(_type, "uint64_t") == 0;
 }
 uint64_t Flag::get_uint64_t() const {
   return *((uint64_t*) _addr);
 }
 void Flag::set_uint64_t(uint64_t value) {
   check_writable();
   *((uint64_t*) _addr) = value;
 }
 bool Flag::is_double() const {
   return strcmp(_type, "double") == 0;
 }
 double Flag::get_double() const {
   return *((double*) _addr);
 }
 void Flag::set_double(double value) {
   check_writable();
   *((double*) _addr) = value;
 }
 bool Flag::is_ccstr() const {
   return strcmp(_type, "ccstr") == 0 || strcmp(_type, "ccstrlist") == 0;
 }
 bool Flag::ccstr_accumulates() const {
   return strcmp(_type, "ccstrlist") == 0;
 }
 ccstr Flag::get_ccstr() const {
   return *((ccstr*) _addr);
 }
 void Flag::set_ccstr(ccstr value) {
   check_writable();
   *((ccstr*) _addr) = value;
 }
 Flag::Flags Flag::get_origin() {
   return Flags(_flags & VALUE_ORIGIN_MASK);
 }
 void Flag::set_origin(Flags origin) {
   assert((origin & VALUE_ORIGIN_MASK) == origin, "sanity");
   _flags = Flags((_flags & ~VALUE_ORIGIN_MASK) | origin);
 }
 bool Flag::is_default() {
   return (get_origin() == DEFAULT);
 }
 bool Flag::is_ergonomic() {
   return (get_origin() == ERGONOMIC);
 }
 bool Flag::is_command_line() {
   return (get_origin() == COMMAND_LINE);
 }
 bool Flag::is_product() const {
   return (_flags & KIND_PRODUCT) != 0;
 }
 bool Flag::is_manageable() const {
   return (_flags & KIND_MANAGEABLE) != 0;
 }
 bool Flag::is_diagnostic() const {
   return (_flags & KIND_DIAGNOSTIC) != 0;
 }
 bool Flag::is_experimental() const {
   return (_flags & KIND_EXPERIMENTAL) != 0;
 }
 bool Flag::is_notproduct() const {
   return (_flags & KIND_NOT_PRODUCT) != 0;
 }
 bool Flag::is_develop() const {
   return (_flags & KIND_DEVELOP) != 0;
 }
 bool Flag::is_read_write() const {
   return (_flags & KIND_READ_WRITE) != 0;
 }
 bool Flag::is_commercial() const {
   return (_flags & KIND_COMMERCIAL) != 0;
 }
 /**
  * Returns if this flag is a constant in the binary.  Right now this is
  * true for notproduct and develop flags in product builds.
  */
 bool Flag::is_constant_in_binary() const {
 #ifdef PRODUCT
     return is_notproduct() || is_develop();
 #else
     return false;
 #endif
 }
 bool Flag::is_unlocker() const {
   return strcmp(_name, "UnlockDiagnosticVMOptions") == 0     ||
          strcmp(_name, "UnlockExperimentalVMOptions") == 0   ||
          is_unlocker_ext();
 }
 bool Flag::is_unlocked() const {
   if (is_diagnostic()) {
     return UnlockDiagnosticVMOptions;
   }
   if (is_experimental()) {
     return UnlockExperimentalVMOptions;
   }
   return is_unlocked_ext();
 }
 void Flag::unlock_diagnostic() {
   assert(is_diagnostic(), "sanity");
   _flags = Flags(_flags & ~KIND_DIAGNOSTIC);
 }
 // Get custom message for this locked flag, or return NULL if
 // none is available.
 void Flag::get_locked_message(char* buf, int buflen) const {
   buf[0] = '\0';
   if (is_diagnostic() && !is_unlocked()) {
     jio_snprintf(buf, buflen, "Error: VM option '%s' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.\n",
                  _name);
     return;
   }
   if (is_experimental() && !is_unlocked()) {
     jio_snprintf(buf, buflen, "Error: VM option '%s' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.\n",
                  _name);
     return;
   }
   if (is_develop() && is_product_build()) {
     jio_snprintf(buf, buflen, "Error: VM option '%s' is develop and is available only in debug version of VM.\n",
                  _name);
     return;
   }
   if (is_notproduct() && is_product_build()) {
     jio_snprintf(buf, buflen, "Error: VM option '%s' is notproduct and is available only in debug version of VM.\n",
                  _name);
     return;
   }
   get_locked_message_ext(buf, buflen);
 }
 bool Flag::is_writeable() const {
   return is_manageable() || (is_product() && is_read_write()) || is_writeable_ext();
 }
 // All flags except "manageable" are assumed to be internal flags.
 // Long term, we need to define a mechanism to specify which flags
 // are external/stable and change this function accordingly.
 bool Flag::is_external() const {
   return is_manageable() || is_external_ext();
 }
 // Length of format string (e.g. "%.1234s") for printing ccstr below
 #define FORMAT_BUFFER_LEN 16
 PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL
 void Flag::print_on(outputStream* st, bool withComments) {
   // Don't print notproduct and develop flags in a product build.
   if (is_constant_in_binary()) {
     return;
   }
   st->print("%9s %-40s %c= ", _type, _name, (!is_default() ? ':' : ' '));
   if (is_bool()) {
     st->print("%-16s", get_bool() ? "true" : "false");
   }
   if (is_intx()) {
     st->print("%-16ld", get_intx());
   }
   if (is_uintx()) {
     st->print("%-16lu", get_uintx());
   }
   if (is_uint64_t()) {
     st->print("%-16lu", get_uint64_t());
   }
   if (is_double()) {
     st->print("%-16f", get_double());
   }
   if (is_ccstr()) {
     const char* cp = get_ccstr();
     if (cp != NULL) {
       const char* eol;
       while ((eol = strchr(cp, '\n')) != NULL) {
         char format_buffer[FORMAT_BUFFER_LEN];
         size_t llen = pointer_delta(eol, cp, sizeof(char));
         jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
             "%%." SIZE_FORMAT "s", llen);
 PRAGMA_DIAG_PUSH
 PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL
         st->print(format_buffer, cp);
 PRAGMA_DIAG_POP
         st->cr();
         cp = eol+1;
         st->print("%5s %-35s += ", "", _name);
       }
       st->print("%-16s", cp);
     }
     else st->print("%-16s", "");
   }
   st->print("%-20s", " ");
   print_kind(st);
   if (withComments) {
 #ifndef PRODUCT
     st->print("%s", _doc);
 #endif
   }
   st->cr();
 }
 void Flag::print_kind(outputStream* st) {
   struct Data {
     int flag;
     const char* name;
   };
   Data data[] = {
       { KIND_C1, "C1" },
       { KIND_C2, "C2" },
       { KIND_ARCH, "ARCH" },
       { KIND_SHARK, "SHARK" },
       { KIND_PLATFORM_DEPENDENT, "pd" },
       { KIND_PRODUCT, "product" },
       { KIND_MANAGEABLE, "manageable" },
       { KIND_DIAGNOSTIC, "diagnostic" },
       { KIND_EXPERIMENTAL, "experimental" },
       { KIND_COMMERCIAL, "commercial" },
       { KIND_NOT_PRODUCT, "notproduct" },
       { KIND_DEVELOP, "develop" },
       { KIND_LP64_PRODUCT, "lp64_product" },
       { KIND_READ_WRITE, "rw" },
       { -1, "" }
   };
   if ((_flags & KIND_MASK) != 0) {
     st->print("{");
     bool is_first = true;
     for (int i = 0; data[i].flag != -1; i++) {
       Data d = data[i];
       if ((_flags & d.flag) != 0) {
         if (is_first) {
           is_first = false;
         } else {
           st->print(" ");
         }
         st->print("%s", d.name);
       }
     }
     st->print("}");
   }
 }
 void Flag::print_as_flag(outputStream* st) {
   if (is_bool()) {
     st->print("-XX:%s%s", get_bool() ? "+" : "-", _name);
   } else if (is_intx()) {
     st->print("-XX:%s=" INTX_FORMAT, _name, get_intx());
   } else if (is_uintx()) {
     st->print("-XX:%s=" UINTX_FORMAT, _name, get_uintx());
   } else if (is_uint64_t()) {
     st->print("-XX:%s=" UINT64_FORMAT, _name, get_uint64_t());
   } else if (is_double()) {
     st->print("-XX:%s=%f", _name, get_double());
   } else if (is_ccstr()) {
     st->print("-XX:%s=", _name);
     const char* cp = get_ccstr();
     if (cp != NULL) {
       // Need to turn embedded '\n's back into separate arguments
       // Not so efficient to print one character at a time,
       // but the choice is to do the transformation to a buffer
       // and print that.  And this need not be efficient.
       for (; *cp != '\0'; cp += 1) {
         switch (*cp) {
           default:
             st->print("%c", *cp);
             break;
           case '\n':
             st->print(" -XX:%s=", _name);
             break;
         }
       }
     }
   } else {
     ShouldNotReachHere();
   }
 }
 // 4991491 do not "optimize out" the was_set false values: omitting them
 // tickles a Microsoft compiler bug causing flagTable to be malformed
 #define NAME(name) NOT_PRODUCT(&name) PRODUCT_ONLY(&CONST_##name)
 #define RUNTIME_PRODUCT_FLAG_STRUCT(     type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT) },
 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(  type, name,        doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(  type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DIAGNOSTIC) },
 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_EXPERIMENTAL) },
 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(  type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_MANAGEABLE) },
 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(  type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT | Flag::KIND_READ_WRITE) },
 #define RUNTIME_DEVELOP_FLAG_STRUCT(     type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DEVELOP) },
 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(  type, name,        doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(  type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_NOT_PRODUCT) },
 #ifdef _LP64
 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_LP64_PRODUCT) },
 #else
 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
 #endif // _LP64
 #define C1_PRODUCT_FLAG_STRUCT(          type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_PRODUCT) },
 #define C1_PD_PRODUCT_FLAG_STRUCT(       type, name,        doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
 #define C1_DIAGNOSTIC_FLAG_STRUCT(       type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DIAGNOSTIC) },
 #define C1_DEVELOP_FLAG_STRUCT(          type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DEVELOP) },
 #define C1_PD_DEVELOP_FLAG_STRUCT(       type, name,        doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
 #define C1_NOTPRODUCT_FLAG_STRUCT(       type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_NOT_PRODUCT) },
 #define C2_PRODUCT_FLAG_STRUCT(          type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_PRODUCT) },
 #define C2_PD_PRODUCT_FLAG_STRUCT(       type, name,        doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
 #define C2_DIAGNOSTIC_FLAG_STRUCT(       type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DIAGNOSTIC) },
 #define C2_EXPERIMENTAL_FLAG_STRUCT(     type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_EXPERIMENTAL) },
 #define C2_DEVELOP_FLAG_STRUCT(          type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP) },
 #define C2_PD_DEVELOP_FLAG_STRUCT(       type, name,        doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
 #define C2_NOTPRODUCT_FLAG_STRUCT(       type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_NOT_PRODUCT) },
 #define ARCH_PRODUCT_FLAG_STRUCT(        type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_PRODUCT) },
 #define ARCH_DIAGNOSTIC_FLAG_STRUCT(     type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DIAGNOSTIC) },
 #define ARCH_EXPERIMENTAL_FLAG_STRUCT(   type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_EXPERIMENTAL) },
 #define ARCH_DEVELOP_FLAG_STRUCT(        type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DEVELOP) },
 #define ARCH_NOTPRODUCT_FLAG_STRUCT(     type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_NOT_PRODUCT) },
 #define SHARK_PRODUCT_FLAG_STRUCT(       type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_PRODUCT) },
 #define SHARK_PD_PRODUCT_FLAG_STRUCT(    type, name,        doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
 #define SHARK_DIAGNOSTIC_FLAG_STRUCT(    type, name, value, doc) { #type, XSTR(name), &name,      NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DIAGNOSTIC) },
 #define SHARK_DEVELOP_FLAG_STRUCT(       type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DEVELOP) },
 #define SHARK_PD_DEVELOP_FLAG_STRUCT(    type, name,        doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
 #define SHARK_NOTPRODUCT_FLAG_STRUCT(    type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_NOT_PRODUCT) },
 static Flag flagTable[] = {
  RUNTIME_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_EXPERIMENTAL_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT, RUNTIME_MANAGEABLE_FLAG_STRUCT, RUNTIME_PRODUCT_RW_FLAG_STRUCT, RUNTIME_LP64_PRODUCT_FLAG_STRUCT)
  RUNTIME_OS_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT)
 #if INCLUDE_ALL_GCS
  G1_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_EXPERIMENTAL_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT, RUNTIME_MANAGEABLE_FLAG_STRUCT, RUNTIME_PRODUCT_RW_FLAG_STRUCT)
 #endif // INCLUDE_ALL_GCS
 #ifdef COMPILER1
  C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_DIAGNOSTIC_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
 #endif
 #ifdef COMPILER2
  C2_FLAGS(C2_DEVELOP_FLAG_STRUCT, C2_PD_DEVELOP_FLAG_STRUCT, C2_PRODUCT_FLAG_STRUCT, C2_PD_PRODUCT_FLAG_STRUCT, C2_DIAGNOSTIC_FLAG_STRUCT, C2_EXPERIMENTAL_FLAG_STRUCT, C2_NOTPRODUCT_FLAG_STRUCT)
 #endif
 #ifdef SHARK
  SHARK_FLAGS(SHARK_DEVELOP_FLAG_STRUCT, SHARK_PD_DEVELOP_FLAG_STRUCT, SHARK_PRODUCT_FLAG_STRUCT, SHARK_PD_PRODUCT_FLAG_STRUCT, SHARK_DIAGNOSTIC_FLAG_STRUCT, SHARK_NOTPRODUCT_FLAG_STRUCT)
 #endif
  ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, ARCH_PRODUCT_FLAG_STRUCT, ARCH_DIAGNOSTIC_FLAG_STRUCT, ARCH_EXPERIMENTAL_FLAG_STRUCT, ARCH_NOTPRODUCT_FLAG_STRUCT)
  FLAGTABLE_EXT
  {0, NULL, NULL}
 };
 Flag* Flag::flags = flagTable;
 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
 inline bool str_equal(const char* s, const char* q, size_t len) {
   // s is null terminated, q is not!
   if (strlen(s) != (unsigned int) len) return false;
   return strncmp(s, q, len) == 0;
 }
 // Search the flag table for a named flag
 Flag* Flag::find_flag(const char* name, size_t length, bool allow_locked, bool return_flag) {
   for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
     if (str_equal(current->_name, name, length)) {
       // Found a matching entry.
       // Don't report notproduct and develop flags in product builds.
       if (current->is_constant_in_binary()) {
         return (return_flag == true ? current : NULL);
       }
       // Report locked flags only if allowed.
       if (!(current->is_unlocked() || current->is_unlocker())) {
         if (!allow_locked) {
           // disable use of locked flags, e.g. diagnostic, experimental,
           // commercial... until they are explicitly unlocked
           return NULL;
         }
       }
       return current;
     }
   }
   // Flag name is not in the flag table
   return NULL;
 }
 // Compute string similarity based on Dice's coefficient
 static float str_similar(const char* str1, const char* str2, size_t len2) {
   int len1 = (int) strlen(str1);
   int total = len1 + (int) len2;
   int hit = 0;
   for (int i = 0; i < len1 -1; ++i) {
     for (int j = 0; j < (int) len2 -1; ++j) {
       if ((str1[i] == str2[j]) && (str1[i+1] == str2[j+1])) {
         ++hit;
         break;
       }
     }
   }
   return 2.0f * (float) hit / (float) total;
 }
 Flag* Flag::fuzzy_match(const char* name, size_t length, bool allow_locked) {
   float VMOptionsFuzzyMatchSimilarity = 0.7f;
   Flag* match = NULL;
   float score;
   float max_score = -1;
   for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
     score = str_similar(current->_name, name, length);
     if (score > max_score) {
       max_score = score;
       match = current;
     }
   }
   if (!(match->is_unlocked() || match->is_unlocker())) {
     if (!allow_locked) {
       return NULL;
     }
   }
   if (max_score < VMOptionsFuzzyMatchSimilarity) {
     return NULL;
   }
   return match;
 }
 // Returns the address of the index'th element
 static Flag* address_of_flag(CommandLineFlagWithType flag) {
   assert((size_t)flag < Flag::numFlags, "bad command line flag index");
   return &Flag::flags[flag];
 }
 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
   assert((size_t)flag < Flag::numFlags, "bad command line flag index");
   Flag* f = &Flag::flags[flag];
   return f->is_default();
 }
 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
   assert((size_t)flag < Flag::numFlags, "bad command line flag index");
   Flag* f = &Flag::flags[flag];
   return f->is_ergonomic();
 }
 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
   assert((size_t)flag < Flag::numFlags, "bad command line flag index");
   Flag* f = &Flag::flags[flag];
   return f->is_command_line();
 }
 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
   Flag* result = Flag::find_flag((char*)name, strlen(name));
   if (result == NULL) return false;
   *value = result->is_command_line();
   return true;
 }
 template<class E, class T>
 static void trace_flag_changed(const char* name, const T old_value, const T new_value, const Flag::Flags origin)
 {
   E e;
   e.set_name(name);
   e.set_old_value(old_value);
   e.set_new_value(new_value);
   e.set_origin(origin);
   e.commit();
 }
 bool CommandLineFlags::boolAt(const char* name, size_t len, bool* value) {
   Flag* result = Flag::find_flag(name, len);
   if (result == NULL) return false;
   if (!result->is_bool()) return false;
   *value = result->get_bool();
   return true;
 }
 bool CommandLineFlags::boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin) {
   Flag* result = Flag::find_flag(name, len);
   if (result == NULL) return false;
   if (!result->is_bool()) return false;
   bool old_value = result->get_bool();
   trace_flag_changed<EventBooleanFlagChanged, bool>(name, old_value, *value, origin);
   result->set_bool(*value);
   *value = old_value;
   result->set_origin(origin);
   return true;
 }
 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, Flag::Flags origin) {
   Flag* faddr = address_of_flag(flag);
   guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
   trace_flag_changed<EventBooleanFlagChanged, bool>(faddr->_name, faddr->get_bool(), value, origin);
   faddr->set_bool(value);
   faddr->set_origin(origin);
 }
 bool CommandLineFlags::intxAt(const char* name, size_t len, intx* value) {
   Flag* result = Flag::find_flag(name, len);
   if (result == NULL) return false;
   if (!result->is_intx()) return false;
   *value = result->get_intx();
   return true;
 }
 bool CommandLineFlags::intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin) {
   Flag* result = Flag::find_flag(name, len);
   if (result == NULL) return false;
   if (!result->is_intx()) return false;
   intx old_value = result->get_intx();
   trace_flag_changed<EventLongFlagChanged, s8>(name, old_value, *value, origin);
   result->set_intx(*value);
   *value = old_value;
   result->set_origin(origin);
   return true;
 }
 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, Flag::Flags origin) {
   Flag* faddr = address_of_flag(flag);
   guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
   trace_flag_changed<EventLongFlagChanged, s8>(faddr->_name, faddr->get_intx(), value, origin);
   faddr->set_intx(value);
   faddr->set_origin(origin);
 }
 bool CommandLineFlags::uintxAt(const char* name, size_t len, uintx* value) {
   Flag* result = Flag::find_flag(name, len);
   if (result == NULL) return false;
   if (!result->is_uintx()) return false;
   *value = result->get_uintx();
   return true;
 }
 bool CommandLineFlags::uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin) {
   Flag* result = Flag::find_flag(name, len);
   if (result == NULL) return false;
   if (!result->is_uintx()) return false;
   uintx old_value = result->get_uintx();
   trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
   result->set_uintx(*value);
   *value = old_value;
   result->set_origin(origin);
   return true;
 }
 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, Flag::Flags origin) {
   Flag* faddr = address_of_flag(flag);
   guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
   trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_uintx(), value, origin);
   faddr->set_uintx(value);
   faddr->set_origin(origin);
 }
 bool CommandLineFlags::uint64_tAt(const char* name, size_t len, uint64_t* value) {
   Flag* result = Flag::find_flag(name, len);
   if (result == NULL) return false;
   if (!result->is_uint64_t()) return false;
   *value = result->get_uint64_t();
   return true;
 }
 bool CommandLineFlags::uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin) {
   Flag* result = Flag::find_flag(name, len);
   if (result == NULL) return false;
   if (!result->is_uint64_t()) return false;
   uint64_t old_value = result->get_uint64_t();
   trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
   result->set_uint64_t(*value);
   *value = old_value;
   result->set_origin(origin);
   return true;
 }
 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, Flag::Flags origin) {
   Flag* faddr = address_of_flag(flag);
   guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
   trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_uint64_t(), value, origin);
   faddr->set_uint64_t(value);
   faddr->set_origin(origin);
 }
 bool CommandLineFlags::doubleAt(const char* name, size_t len, double* value) {
   Flag* result = Flag::find_flag(name, len);
   if (result == NULL) return false;
   if (!result->is_double()) return false;
   *value = result->get_double();
   return true;
 }
 bool CommandLineFlags::doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin) {
   Flag* result = Flag::find_flag(name, len);
   if (result == NULL) return false;
   if (!result->is_double()) return false;
   double old_value = result->get_double();
   trace_flag_changed<EventDoubleFlagChanged, double>(name, old_value, *value, origin);
   result->set_double(*value);
   *value = old_value;
   result->set_origin(origin);
   return true;
 }
 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, Flag::Flags origin) {
   Flag* faddr = address_of_flag(flag);
   guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
   trace_flag_changed<EventDoubleFlagChanged, double>(faddr->_name, faddr->get_double(), value, origin);
   faddr->set_double(value);
   faddr->set_origin(origin);
 }
 bool CommandLineFlags::ccstrAt(const char* name, size_t len, ccstr* value) {
   Flag* result = Flag::find_flag(name, len);
   if (result == NULL) return false;
   if (!result->is_ccstr()) return false;
   *value = result->get_ccstr();
   return true;
 }
 bool CommandLineFlags::ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin) {
   Flag* result = Flag::find_flag(name, len);
   if (result == NULL) return false;
   if (!result->is_ccstr()) return false;
   ccstr old_value = result->get_ccstr();
   trace_flag_changed<EventStringFlagChanged, const char*>(name, old_value, *value, origin);
   char* new_value = NULL;
   if (*value != NULL) {
     new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1, mtInternal);
     strcpy(new_value, *value);
   }
   result->set_ccstr(new_value);
   if (result->is_default() && old_value != NULL) {
     // Prior value is NOT heap allocated, but was a literal constant.
     char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1, mtInternal);
     strcpy(old_value_to_free, old_value);
     old_value = old_value_to_free;
   }
   *value = old_value;
   result->set_origin(origin);
   return true;
 }
 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, Flag::Flags origin) {
   Flag* faddr = address_of_flag(flag);
   guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
   ccstr old_value = faddr->get_ccstr();
   trace_flag_changed<EventStringFlagChanged, const char*>(faddr->_name, old_value, value, origin);
   char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1, mtInternal);
   strcpy(new_value, value);
   faddr->set_ccstr(new_value);
   if (!faddr->is_default() && old_value != NULL) {
     // Prior value is heap allocated so free it.
     FREE_C_HEAP_ARRAY(char, old_value, mtInternal);
   }
   faddr->set_origin(origin);
 }
 extern "C" {
   static int compare_flags(const void* void_a, const void* void_b) {
     return strcmp((*((Flag**) void_a))->_name, (*((Flag**) void_b))->_name);
   }
 }
 void CommandLineFlags::printSetFlags(outputStream* out) {
   // Print which flags were set on the command line
   // note: this method is called before the thread structure is in place
   //       which means resource allocation cannot be used.
   // The last entry is the null entry.
   const size_t length = Flag::numFlags - 1;
   // Sort
   Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
   for (size_t i = 0; i < length; i++) {
     array[i] = &flagTable[i];
   }
   qsort(array, length, sizeof(Flag*), compare_flags);
   // Print
   for (size_t i = 0; i < length; i++) {
     if (array[i]->get_origin() /* naked field! */) {
       array[i]->print_as_flag(out);
       out->print(" ");
     }
   }
   out->cr();
   FREE_C_HEAP_ARRAY(Flag*, array, mtInternal);
 }
 #ifndef PRODUCT
 void CommandLineFlags::verify() {
   assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
 }
 #endif // PRODUCT
 void CommandLineFlags::printFlags(outputStream* out, bool withComments) {
   // Print the flags sorted by name
   // note: this method is called before the thread structure is in place
   //       which means resource allocation cannot be used.
   // The last entry is the null entry.
   const size_t length = Flag::numFlags - 1;
   // Sort
   Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
   for (size_t i = 0; i < length; i++) {
     array[i] = &flagTable[i];
   }
   qsort(array, length, sizeof(Flag*), compare_flags);
   // Print
   out->print_cr("[Global flags]");
   for (size_t i = 0; i < length; i++) {
     if (array[i]->is_unlocked()) {
       array[i]->print_on(out, withComments);
     }
   }
   FREE_C_HEAP_ARRAY(Flag*, array, mtInternal);
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/runtime/globals.cpp@427b2fb1944f (annotated)

src/share/vm/runtime/globals.cpp