1/*
2 * Copyright (c) 1997, 2019, 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 */
24
25#include "precompiled.hpp"
26#include "jvm.h"
27#include "memory/allocation.inline.hpp"
28#include "runtime/os.hpp"
29#include "utilities/decoder.hpp"
30#include "utilities/vmError.hpp"
31
32#ifndef _WINDOWS
33#if defined(__APPLE__)
34 #include "decoder_machO.hpp"
35#elif defined(AIX)
36 #include "decoder_aix.hpp"
37#else
38 #include "decoder_elf.hpp"
39#endif
40
41AbstractDecoder* Decoder::_shared_decoder = NULL;
42AbstractDecoder* Decoder::_error_handler_decoder = NULL;
43NullDecoder Decoder::_do_nothing_decoder;
44
45AbstractDecoder* Decoder::get_shared_instance() {
46 assert(shared_decoder_lock()->owned_by_self(), "Require DecoderLock to enter");
47
48 if (_shared_decoder == NULL) {
49 _shared_decoder = create_decoder();
50 }
51 return _shared_decoder;
52}
53
54AbstractDecoder* Decoder::get_error_handler_instance() {
55 if (_error_handler_decoder == NULL) {
56 _error_handler_decoder = create_decoder();
57 }
58 return _error_handler_decoder;
59}
60
61
62AbstractDecoder* Decoder::create_decoder() {
63 AbstractDecoder* decoder;
64#if defined (__APPLE__)
65 decoder = new (std::nothrow)MachODecoder();
66#elif defined(AIX)
67 decoder = new (std::nothrow)AIXDecoder();
68#else
69 decoder = new (std::nothrow)ElfDecoder();
70#endif
71
72 if (decoder == NULL || decoder->has_error()) {
73 if (decoder != NULL) {
74 delete decoder;
75 }
76 decoder = &_do_nothing_decoder;
77 }
78 return decoder;
79}
80
81Mutex* Decoder::shared_decoder_lock() {
82 assert(SharedDecoder_lock != NULL, "Just check");
83 return SharedDecoder_lock;
84}
85
86bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const char* modulepath, bool demangle) {
87 bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;
88 if (error_handling_thread) {
89 return get_error_handler_instance()->decode(addr, buf, buflen, offset, modulepath, demangle);
90 } else {
91 MutexLocker locker(shared_decoder_lock(), Mutex::_no_safepoint_check_flag);
92 return get_shared_instance()->decode(addr, buf, buflen, offset, modulepath, demangle);
93 }
94
95}
96
97bool Decoder::decode(address addr, char* buf, int buflen, int* offset, const void* base) {
98 bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;
99 if (error_handling_thread) {
100 return get_error_handler_instance()->decode(addr, buf, buflen, offset, base);
101 } else {
102 MutexLocker locker(shared_decoder_lock(), Mutex::_no_safepoint_check_flag);
103 return get_shared_instance()->decode(addr, buf, buflen, offset, base);
104 }
105}
106
107
108bool Decoder::demangle(const char* symbol, char* buf, int buflen) {
109 bool error_handling_thread = os::current_thread_id() == VMError::first_error_tid;
110 if (error_handling_thread) {
111 return get_error_handler_instance()->demangle(symbol, buf, buflen);
112 } else {
113 MutexLocker locker(shared_decoder_lock(), Mutex::_no_safepoint_check_flag);
114 return get_shared_instance()->demangle(symbol, buf, buflen);
115 }
116}
117
118void Decoder::print_state_on(outputStream* st) {
119}
120
121bool Decoder::get_source_info(address pc, char* buf, size_t buflen, int* line) {
122 return false;
123}
124
125#endif // !_WINDOWS
126
127