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

src/share/vm/utilities/decoder.cpp@db006a85bf91 (annotated)

src/share/vm/utilities/decoder.cpp

Thu, 09 Feb 2012 10:16:26 -0500

author: zgu
date: Thu, 09 Feb 2012 10:16:26 -0500
changeset 3544: db006a85bf91
parent 3430: d7e3846464d0
child 3961: 3b01d0321dfa
permissions: -rw-r--r--

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

 /*
  * Copyright (c) 1997, 2010, 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 "prims/jvm.h"
 #include "runtime/mutexLocker.hpp"
 #include "runtime/os.hpp"
 #include "utilities/decoder.hpp"
 #include "utilities/vmError.hpp"
 #if defined(_WINDOWS)
   #include "decoder_windows.hpp"
 #elif defined(__APPLE__)
   #include "decoder_machO.hpp"
 #else
   #include "decoder_elf.hpp"
 #endif
 AbstractDecoder*  Decoder::_shared_decoder = NULL;
 AbstractDecoder*  Decoder::_error_handler_decoder = NULL;
 NullDecoder       Decoder::_do_nothing_decoder;
 Mutex*            Decoder::_shared_decoder_lock = new Mutex(Mutex::native,
                                 "SharedDecoderLock");
 AbstractDecoder* Decoder::get_shared_instance() {
   assert(_shared_decoder_lock != NULL && _shared_decoder_lock->owned_by_self(),
     "Require DecoderLock to enter");
   if (_shared_decoder == NULL) {
     _shared_decoder = create_decoder();
   }
   return _shared_decoder;
 }
 AbstractDecoder* Decoder::get_error_handler_instance() {
   if (_error_handler_decoder == NULL) {
     _error_handler_decoder = create_decoder();
   }
   return _error_handler_decoder;
 }
 AbstractDecoder* Decoder::create_decoder() {
   AbstractDecoder* decoder;
 #if defined(_WINDOWS)
   decoder = new (std::nothrow) WindowsDecoder();
 #elif defined (__APPLE__)
   decoder = new (std::nothrow)MachODecoder();
 #else
   decoder = new (std::nothrow)ElfDecoder();
 #endif
   if (decoder == NULL || decoder->has_error()) {
     if (decoder != NULL) {
       delete decoder;
     }
     decoder = &_do_nothing_decoder;
   }
   return decoder;
 }
 bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const char* modulepath) {
   assert(_shared_decoder_lock != NULL, "Just check");
   bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;
   MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true);
   AbstractDecoder* decoder = error_handling_thread ?
     get_error_handler_instance(): get_shared_instance();
   assert(decoder != NULL, "null decoder");
   return decoder->decode(addr, buf, buflen, offset, modulepath);
 }
 bool Decoder::demangle(const char* symbol, char* buf, int buflen) {
   assert(_shared_decoder_lock != NULL, "Just check");
   bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;
   MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true);
   AbstractDecoder* decoder = error_handling_thread ?
     get_error_handler_instance(): get_shared_instance();
   assert(decoder != NULL, "null decoder");
   return decoder->demangle(symbol, buf, buflen);
 }
 bool Decoder::can_decode_C_frame_in_vm() {
   assert(_shared_decoder_lock != NULL, "Just check");
   bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;
   MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true);
   AbstractDecoder* decoder = error_handling_thread ?
     get_error_handler_instance(): get_shared_instance();
   assert(decoder != NULL, "null decoder");
   return decoder->can_decode_C_frame_in_vm();
 }
 /*
  * Shutdown shared decoder and replace it with
  * _do_nothing_decoder. Do nothing with error handler
  * instance, since the JVM is going down.
  */
 void Decoder::shutdown() {
   assert(_shared_decoder_lock != NULL, "Just check");
   MutexLockerEx locker(_shared_decoder_lock, true);
   if (_shared_decoder != NULL &&
     _shared_decoder != &_do_nothing_decoder) {
     delete _shared_decoder;
   }
   _shared_decoder = &_do_nothing_decoder;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/utilities/decoder.cpp@db006a85bf91 (annotated)

src/share/vm/utilities/decoder.cpp