Mercurial > hg > truffle
annotate src/share/vm/utilities/decoder.cpp @ 9126:bc26f978b0ce
HotSpotResolvedObjectType: implement hasFinalizeSubclass() correctly
don't use the (wrong) cached value, but ask the runtime on each request.
Fixes regression on xml.* benchmarks @ specjvm2008. The problem was:
After the constructor of Object was deoptimized due to an assumption violation,
it was recompiled again after some time. However, on recompilation, the value
of hasFinalizeSubclass for the class was not updated and it was compiled again
with a, now wrong, assumption, which then triggers deoptimization again.
This was repeated until it hit the recompilation limit (defined by
PerMethodRecompilationCutoff), and therefore only executed by the interpreter
from now on, causing the performance regression.
author | Bernhard Urban <bernhard.urban@jku.at> |
---|---|
date | Mon, 15 Apr 2013 19:54:58 +0200 |
parents | b9a9ed0f8eeb |
children | 38f750491293 bdd155477289 |
rev | line source |
---|---|
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
1 /* |
6842
b9a9ed0f8eeb
7197424: update copyright year to match last edit in jdk8 hotspot repository
mikael
parents:
6258
diff
changeset
|
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
4 * |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
5 * This code is free software; you can redistribute it and/or modify it |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
6 * under the terms of the GNU General Public License version 2 only, as |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
7 * published by the Free Software Foundation. |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
8 * |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
9 * This code is distributed in the hope that it will be useful, but WITHOUT |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
12 * version 2 for more details (a copy is included in the LICENSE file that |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
13 * accompanied this code). |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
14 * |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
15 * You should have received a copy of the GNU General Public License version |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
16 * 2 along with this work; if not, write to the Free Software Foundation, |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
18 * |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
21 * questions. |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
22 * |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
23 */ |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
24 |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
25 #include "precompiled.hpp" |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
26 #include "prims/jvm.h" |
4803 | 27 #include "runtime/mutexLocker.hpp" |
4917 | 28 #include "runtime/os.hpp" |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
29 #include "utilities/decoder.hpp" |
4917 | 30 #include "utilities/vmError.hpp" |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
31 |
4803 | 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 | |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
39 |
4917 | 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"); | |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
45 |
4917 | 46 AbstractDecoder* Decoder::get_shared_instance() { |
47 assert(_shared_decoder_lock != NULL && _shared_decoder_lock->owned_by_self(), | |
4803 | 48 "Require DecoderLock to enter"); |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
49 |
4917 | 50 if (_shared_decoder == NULL) { |
51 _shared_decoder = create_decoder(); | |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
52 } |
4917 | 53 return _shared_decoder; |
54 } | |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
55 |
4917 | 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 } | |
62 | |
63 | |
64 AbstractDecoder* Decoder::create_decoder() { | |
65 AbstractDecoder* decoder; | |
4803 | 66 #if defined(_WINDOWS) |
4917 | 67 decoder = new (std::nothrow) WindowsDecoder(); |
4803 | 68 #elif defined (__APPLE__) |
4917 | 69 decoder = new (std::nothrow)MachODecoder(); |
4803 | 70 #else |
4917 | 71 decoder = new (std::nothrow)ElfDecoder(); |
4803 | 72 #endif |
73 | |
4917 | 74 if (decoder == NULL || decoder->has_error()) { |
75 if (decoder != NULL) { | |
76 delete decoder; | |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
77 } |
4917 | 78 decoder = &_do_nothing_decoder; |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
79 } |
4917 | 80 return decoder; |
4803 | 81 } |
82 | |
83 bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const char* modulepath) { | |
4917 | 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(); | |
4803 | 89 assert(decoder != NULL, "null decoder"); |
90 | |
91 return decoder->decode(addr, buf, buflen, offset, modulepath); | |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
92 } |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
93 |
6258 | 94 bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const void* base) { |
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 | |
102 return decoder->decode(addr, buf, buflen, offset, base); | |
103 } | |
104 | |
105 | |
4803 | 106 bool Decoder::demangle(const char* symbol, char* buf, int buflen) { |
4917 | 107 assert(_shared_decoder_lock != NULL, "Just check"); |
108 bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; | |
109 MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); | |
110 AbstractDecoder* decoder = error_handling_thread ? | |
111 get_error_handler_instance(): get_shared_instance(); | |
4803 | 112 assert(decoder != NULL, "null decoder"); |
113 return decoder->demangle(symbol, buf, buflen); | |
114 } | |
115 | |
116 bool Decoder::can_decode_C_frame_in_vm() { | |
4917 | 117 assert(_shared_decoder_lock != NULL, "Just check"); |
118 bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid; | |
119 MutexLockerEx locker(error_handling_thread ? NULL : _shared_decoder_lock, true); | |
120 AbstractDecoder* decoder = error_handling_thread ? | |
121 get_error_handler_instance(): get_shared_instance(); | |
4803 | 122 assert(decoder != NULL, "null decoder"); |
123 return decoder->can_decode_C_frame_in_vm(); | |
124 } | |
125 | |
4917 | 126 /* |
127 * Shutdown shared decoder and replace it with | |
128 * _do_nothing_decoder. Do nothing with error handler | |
129 * instance, since the JVM is going down. | |
130 */ | |
4803 | 131 void Decoder::shutdown() { |
4917 | 132 assert(_shared_decoder_lock != NULL, "Just check"); |
133 MutexLockerEx locker(_shared_decoder_lock, true); | |
4803 | 134 |
4917 | 135 if (_shared_decoder != NULL && |
136 _shared_decoder != &_do_nothing_decoder) { | |
137 delete _shared_decoder; | |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
138 } |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
139 |
4917 | 140 _shared_decoder = &_do_nothing_decoder; |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
141 } |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
diff
changeset
|
142 |