jdk8-mips64-public/hotspot: src/share/vm/utilities/decoder.cpp@db006a85bf91

7141259: Native stack is missing in hs_err
Summary: Code cleanup and creating a private decoder for error handler, since it can be triggered from in signal handler, where no lock can be taken
Reviewed-by: dholmes, kamg, acorn, coleenp

     1 /*

     2  * Copyright (c) 1997, 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 #include "precompiled.hpp"

    26 #include "prims/jvm.h"

    27 #include "runtime/mutexLocker.hpp"

    28 #include "runtime/os.hpp"

    29 #include "utilities/decoder.hpp"

    30 #include "utilities/vmError.hpp"

    32 #if defined(_WINDOWS)

    33   #include "decoder_windows.hpp"

    34 #elif defined(__APPLE__)

    35   #include "decoder_machO.hpp"

    36 #else

    37   #include "decoder_elf.hpp"

    38 #endif

    40 AbstractDecoder*  Decoder::_shared_decoder = NULL;

    41 AbstractDecoder*  Decoder::_error_handler_decoder = NULL;

    42 NullDecoder       Decoder::_do_nothing_decoder;

    43 Mutex*            Decoder::_shared_decoder_lock = new Mutex(Mutex::native,

    44                                 "SharedDecoderLock");

    46 AbstractDecoder* Decoder::get_shared_instance() {

    47   assert(_shared_decoder_lock != NULL && _shared_decoder_lock->owned_by_self(),

    48     "Require DecoderLock to enter");

    50   if (_shared_decoder == NULL) {

    51     _shared_decoder = create_decoder();

    52   }

    53   return _shared_decoder;

    54 }

    56 AbstractDecoder* Decoder::get_error_handler_instance() {

    57   if (_error_handler_decoder == NULL) {

    58     _error_handler_decoder = create_decoder();

    59   }

    60   return _error_handler_decoder;

    61 }

    64 AbstractDecoder* Decoder::create_decoder() {

    65   AbstractDecoder* decoder;

    66 #if defined(_WINDOWS)

    67   decoder = new (std::nothrow) WindowsDecoder();

    68 #elif defined (__APPLE__)

    69   decoder = new (std::nothrow)MachODecoder();

    70 #else

    71   decoder = new (std::nothrow)ElfDecoder();

    72 #endif

    74   if (decoder == NULL || decoder->has_error()) {

    75     if (decoder != NULL) {

    76       delete decoder;

    77     }

    78     decoder = &_do_nothing_decoder;

    79   }

    80   return decoder;

    81 }

    83 bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const char* modulepath) {

    84   assert(_shared_decoder_lock != NULL, "Just check");

    85   bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;

    86   MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true);

    87   AbstractDecoder* decoder = error_handling_thread ?

    88     get_error_handler_instance(): get_shared_instance();

    89   assert(decoder != NULL, "null decoder");

    91   return decoder->decode(addr, buf, buflen, offset, modulepath);

    92 }

    94 bool Decoder::demangle(const char* symbol, char* buf, int buflen) {

    95   assert(_shared_decoder_lock != NULL, "Just check");

    96   bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;

    97   MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true);

    98   AbstractDecoder* decoder = error_handling_thread ?

    99     get_error_handler_instance(): get_shared_instance();

   100   assert(decoder != NULL, "null decoder");

   101   return decoder->demangle(symbol, buf, buflen);

   102 }

   104 bool Decoder::can_decode_C_frame_in_vm() {

   105   assert(_shared_decoder_lock != NULL, "Just check");

   106   bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;

   107   MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true);

   108   AbstractDecoder* decoder = error_handling_thread ?

   109     get_error_handler_instance(): get_shared_instance();

   110   assert(decoder != NULL, "null decoder");

   111   return decoder->can_decode_C_frame_in_vm();

   112 }

   114 /*

   115  * Shutdown shared decoder and replace it with

   116  * _do_nothing_decoder. Do nothing with error handler

   117  * instance, since the JVM is going down.

   118  */

   119 void Decoder::shutdown() {

   120   assert(_shared_decoder_lock != NULL, "Just check");

   121   MutexLockerEx locker(_shared_decoder_lock, true);

   123   if (_shared_decoder != NULL &&

   124     _shared_decoder != &_do_nothing_decoder) {

   125     delete _shared_decoder;

   126   }

   128   _shared_decoder = &_do_nothing_decoder;

   129 }

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

src/share/vm/utilities/decoder.cpp@db006a85bf91

src/share/vm/utilities/decoder.cpp