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comparison src/share/vm/utilities/decoder.cpp @ 2022:2d4762ec74af

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7003748: Decode C stack frames when symbols are presented (PhoneHome project) Summary: Implemented in-process C native stack frame decoding when symbols are available. Reviewed-by: coleenp, never
author zgu
date Sat, 11 Dec 2010 13:20:56 -0500
parents
children f08d439fab8c
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1972:f95d63e2154a 2022:2d4762ec74af
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 */
24
25 #include "precompiled.hpp"
26 #include "prims/jvm.h"
27 #include "utilities/decoder.hpp"
28
29 Decoder::decoder_status Decoder::_decoder_status = Decoder::no_error;
30 bool Decoder::_initialized = false;
31
32 #ifndef _WINDOWS
33
34 // Implementation of common functionalities among Solaris and Linux
35 #include "utilities/elfFile.hpp"
36
37 ElfFile* Decoder::_opened_elf_files = NULL;
38
39 bool Decoder::can_decode_C_frame_in_vm() {
40 return true;
41 }
42
43 void Decoder::initialize() {
44 _initialized = true;
45 }
46
47 void Decoder::uninitialize() {
48 if (_opened_elf_files != NULL) {
49 delete _opened_elf_files;
50 _opened_elf_files = NULL;
51 }
52 _initialized = false;
53 }
54
55 Decoder::decoder_status Decoder::decode(address addr, const char* filepath, char *buf, int buflen, int *offset) {
56 if (_decoder_status != no_error) {
57 return _decoder_status;
58 }
59
60 ElfFile* file = get_elf_file(filepath);
61 if (_decoder_status != no_error) {
62 return _decoder_status;
63 }
64
65 const char* symbol = file->decode(addr, offset);
66 if (file->get_status() == out_of_memory) {
67 _decoder_status = out_of_memory;
68 return _decoder_status;
69 } else if (symbol != NULL) {
70 if (!demangle(symbol, buf, buflen)) {
71 jio_snprintf(buf, buflen, "%s", symbol);
72 }
73 return no_error;
74 } else {
75 return symbol_not_found;
76 }
77 }
78
79 ElfFile* Decoder::get_elf_file(const char* filepath) {
80 if (_decoder_status != no_error) {
81 return NULL;
82 }
83 ElfFile* file = _opened_elf_files;
84 while (file != NULL) {
85 if (file->same_elf_file(filepath)) {
86 return file;
87 }
88 file = file->m_next;
89 }
90
91 file = new ElfFile(filepath);
92 if (file == NULL) {
93 _decoder_status = out_of_memory;
94 }
95 if (_opened_elf_files != NULL) {
96 file->m_next = _opened_elf_files;
97 }
98
99 _opened_elf_files = file;
100 return file;
101 }
102
103 #endif
104