jdk8-mips64-public/hotspot: src/share/vm/prims/jvmtiTrace.hpp@4c84d351cca9

8007074: SIGSEGV at ParMarkBitMap::verify_clear()
Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso

     1 /*

     2  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_PRIMS_JVMTITRACE_HPP

    26 #define SHARE_VM_PRIMS_JVMTITRACE_HPP

    28 #include "classfile/systemDictionary.hpp"

    29 #include "jvmtifiles/jvmti.h"

    30 #include "oops/objArrayOop.hpp"

    31 #include "prims/jvmtiEnvThreadState.hpp"

    32 #include "prims/jvmtiEventController.hpp"

    33 #include "prims/jvmtiUtil.hpp"

    34 #include "runtime/stackValueCollection.hpp"

    35 #include "runtime/vm_operations.hpp"

    37 ///////////////////////////////////////////////////////////////

    38 //

    39 // class JvmtiTrace

    40 //

    41 // Support for JVMTI tracing code

    42 //

    44 // Support tracing except in product build on the client compiler

    45 #ifndef PRODUCT

    46 #define JVMTI_TRACE

    47 #else

    48 #ifdef COMPILER2

    49 #define JVMTI_TRACE

    50 #endif

    51 #endif

    53 #ifdef JVMTI_TRACE

    55 class JvmtiTrace : AllStatic {

    57   static bool        _initialized;

    58   static bool        _on;

    59   static bool        _trace_event_controller;

    60   static jbyte       _trace_flags[];

    61   static jbyte       _event_trace_flags[];

    62   static const char* _event_names[];

    63   static jint        _max_function_index;

    64   static jint        _max_event_index;

    65   static short       _exclude_functions[];

    66   static const char* _function_names[];

    68 public:

    70   enum {

    71     SHOW_IN =              01,

    72     SHOW_OUT =             02,

    73     SHOW_ERROR =           04,

    74     SHOW_IN_DETAIL =      010,

    75     SHOW_OUT_DETAIL =     020,

    76     SHOW_EVENT_TRIGGER =  040,

    77     SHOW_EVENT_SENT =    0100

    78   };

    80   static bool tracing()                     { return _on; }

    81   static bool trace_event_controller()      { return _trace_event_controller; }

    82   static jbyte trace_flags(int num)         { return _trace_flags[num]; }

    83   static jbyte event_trace_flags(int num)   { return _event_trace_flags[num]; }

    84   static const char* function_name(int num) { return _function_names[num]; } // To Do: add range checking

    86   static const char* event_name(int num) {

    87     static char* ext_event_name = (char*)"(extension event)";

    88     if (num >= JVMTI_MIN_EVENT_TYPE_VAL && num <= JVMTI_MAX_EVENT_TYPE_VAL) {

    89       return _event_names[num];

    90     } else {

    91       return ext_event_name;

    92     }

    93   }

    95   static const char* enum_name(const char** names, const jint* values, jint value);

    97   static void initialize();

    98   static void shutdown();

   100   // return a valid string no matter what state the thread is in

   101   static const char *safe_get_thread_name(Thread *thread);

   103   // return the name of the current thread

   104   static const char *safe_get_current_thread_name();

   106   // return a valid string no matter what the state of k_mirror

   107   static const char *get_class_name(oop k_mirror);

   108 };

   110 #endif /*JVMTI_TRACE */

   112 #endif // SHARE_VM_PRIMS_JVMTITRACE_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/prims/jvmtiTrace.hpp@4c84d351cca9

src/share/vm/prims/jvmtiTrace.hpp