decoder.cpp revision 2721:f08d439fab8c 
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
29Decoder::decoder_status  Decoder::_decoder_status = Decoder::no_error;
30bool                     Decoder::_initialized = false;
31
32#if !defined(_WINDOWS) && !defined(__APPLE__)
33
34// Implementation of common functionalities among Solaris and Linux
35#include "utilities/elfFile.hpp"
36
37ElfFile* Decoder::_opened_elf_files = NULL;
38
39bool Decoder::can_decode_C_frame_in_vm() {
40  return true;
41}
42
43void Decoder::initialize() {
44  _initialized = true;
45}
46
47void Decoder::uninitialize() {
48  if (_opened_elf_files != NULL) {
49    delete _opened_elf_files;
50    _opened_elf_files = NULL;
51  }
52  _initialized = false;
53}
54
55Decoder::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
79ElfFile* 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