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comparison src/share/vm/utilities/decoder_elf.cpp @ 4803:d7e3846464d0

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7071311: Decoder enhancement Summary: Made decoder thread-safe Reviewed-by: coleenp, kamg
author zgu
date Tue, 17 Jan 2012 13:08:52 -0500
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children b9a9ed0f8eeb
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4801:4f3ce9284781 4803:d7e3846464d0
1 /*
2 * Copyright (c) 2011, 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
27 #if !defined(_WINDOWS) && !defined(__APPLE__)
28 #include "decoder_elf.hpp"
29
30 ElfDecoder::~ElfDecoder() {
31 if (_opened_elf_files != NULL) {
32 delete _opened_elf_files;
33 _opened_elf_files = NULL;
34 }
35 }
36
37 bool ElfDecoder::decode(address addr, char *buf, int buflen, int* offset, const char* filepath) {
38 assert(filepath, "null file path");
39 assert(buf != NULL && buflen > 0, "Invalid buffer");
40 if (has_error()) return false;
41 ElfFile* file = get_elf_file(filepath);
42 if (file == NULL) {
43 return false;
44 }
45
46 if (!file->decode(addr, buf, buflen, offset)) {
47 return false;
48 }
49 if (buf[0] != '\0') {
50 demangle(buf, buf, buflen);
51 }
52 return true;
53 }
54
55 ElfFile* ElfDecoder::get_elf_file(const char* filepath) {
56 ElfFile* file;
57
58 file = _opened_elf_files;
59 while (file != NULL) {
60 if (file->same_elf_file(filepath)) {
61 return file;
62 }
63 file = file->next();
64 }
65
66 file = new (std::nothrow)ElfFile(filepath);
67 if (file != NULL) {
68 if (_opened_elf_files != NULL) {
69 file->set_next(_opened_elf_files);
70 }
71 _opened_elf_files = file;
72 }
73
74 return file;
75 }
76 #endif