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annotate src/os/windows/vm/decoder_windows.cpp @ 3095:d3d00c1ea071

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IdealGraphVisualizer: Enhance text view so it can display arbitrary properties from the active graph's group. For diff graphs, it shows the textual difference between the property strings using the NetBeans Diff module.
author Peter Hofer <peter.hofer@jku.at>
date Wed, 29 Jun 2011 17:33:35 +0200
parents 2d4762ec74af
children 5def270bc147
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2022
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1 /*
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "prims/jvm.h"
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27 #include "utilities/decoder.hpp"
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28
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29 HMODULE Decoder::_dbghelp_handle = NULL;
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30 bool Decoder::_can_decode_in_vm = false;
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31 pfn_SymGetSymFromAddr64 Decoder::_pfnSymGetSymFromAddr64 = NULL;
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32 pfn_UndecorateSymbolName Decoder::_pfnUndecorateSymbolName = NULL;
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33
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34 void Decoder::initialize() {
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35 if (!_initialized) {
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36 _initialized = true;
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37
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38 HMODULE handle = ::LoadLibrary("dbghelp.dll");
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39 if (!handle) {
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40 _decoder_status = helper_not_found;
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41 return;
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42 }
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43
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44 _dbghelp_handle = handle;
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45
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46 pfn_SymSetOptions _pfnSymSetOptions = (pfn_SymSetOptions)::GetProcAddress(handle, "SymSetOptions");
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47 pfn_SymInitialize _pfnSymInitialize = (pfn_SymInitialize)::GetProcAddress(handle, "SymInitialize");
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48 _pfnSymGetSymFromAddr64 = (pfn_SymGetSymFromAddr64)::GetProcAddress(handle, "SymGetSymFromAddr64");
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49 _pfnUndecorateSymbolName = (pfn_UndecorateSymbolName)GetProcAddress(handle, "UnDecorateSymbolName");
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50
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51 if (_pfnSymSetOptions == NULL || _pfnSymInitialize == NULL || _pfnSymGetSymFromAddr64 == NULL) {
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52 _pfnSymGetSymFromAddr64 = NULL;
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53 _pfnUndecorateSymbolName = NULL;
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54 ::FreeLibrary(handle);
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55 _dbghelp_handle = NULL;
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56 _decoder_status = helper_func_error;
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57 return;
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58 }
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59
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60 _pfnSymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS);
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61 if (!_pfnSymInitialize(GetCurrentProcess(), NULL, TRUE)) {
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62 _pfnSymGetSymFromAddr64 = NULL;
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63 _pfnUndecorateSymbolName = NULL;
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64 ::FreeLibrary(handle);
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65 _dbghelp_handle = NULL;
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66 _decoder_status = helper_init_error;
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67 return;
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68 }
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69
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70 // find out if jvm.dll contains private symbols, by decoding
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71 // current function and comparing the result
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72 address addr = (address)Decoder::initialize;
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73 char buf[MAX_PATH];
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74 if (decode(addr, buf, sizeof(buf), NULL) == no_error) {
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75 _can_decode_in_vm = !strcmp(buf, "Decoder::initialize");
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76 }
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77 }
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78 }
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79
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80 void Decoder::uninitialize() {
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81 assert(_initialized, "Decoder not yet initialized");
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82 _pfnSymGetSymFromAddr64 = NULL;
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83 _pfnUndecorateSymbolName = NULL;
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84 if (_dbghelp_handle != NULL) {
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85 ::FreeLibrary(_dbghelp_handle);
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86 }
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87 _initialized = false;
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88 }
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89
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90 bool Decoder::can_decode_C_frame_in_vm() {
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91 initialize();
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92 return _can_decode_in_vm;
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93 }
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94
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95
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96 Decoder::decoder_status Decoder::decode(address addr, char *buf, int buflen, int *offset) {
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97 assert(_initialized, "Decoder not yet initialized");
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98 if (_pfnSymGetSymFromAddr64 != NULL) {
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99 PIMAGEHLP_SYMBOL64 pSymbol;
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100 char symbolInfo[MAX_PATH + sizeof(IMAGEHLP_SYMBOL64)];
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101 pSymbol = (PIMAGEHLP_SYMBOL64)symbolInfo;
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102 pSymbol->MaxNameLength = MAX_PATH;
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103 pSymbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
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104 DWORD64 displacement;
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105 if (_pfnSymGetSymFromAddr64(::GetCurrentProcess(), (DWORD64)addr, &displacement, pSymbol)) {
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106 if (buf != NULL) {
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107 if (!demangle(pSymbol->Name, buf, buflen)) {
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108 jio_snprintf(buf, buflen, "%s", pSymbol->Name);
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109 }
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110 }
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111 if (offset != NULL) *offset = (int)displacement;
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112 return no_error;
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113 }
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114 }
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115 return helper_not_found;
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116 }
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117
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118 bool Decoder::demangle(const char* symbol, char *buf, int buflen) {
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119 assert(_initialized, "Decoder not yet initialized");
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120 return _pfnUndecorateSymbolName != NULL &&
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121 _pfnUndecorateSymbolName(symbol, buf, buflen, UNDNAME_COMPLETE);
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122 }
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123