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1 /* |
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2 * Copyright (c) 2002, 2013, 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 <jni.h> |
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26 #include "libproc.h" |
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27 |
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28 #include <elf.h> |
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29 #include <sys/types.h> |
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30 #include <sys/stat.h> |
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31 #include <fcntl.h> |
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32 #include <stdlib.h> |
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33 #include <string.h> |
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34 #include <limits.h> |
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35 |
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36 #if defined(x86_64) && !defined(amd64) |
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37 #define amd64 1 |
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38 #endif |
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39 |
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40 #ifdef i386 |
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41 #include "sun_jvm_hotspot_debugger_x86_X86ThreadContext.h" |
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42 #endif |
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43 |
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44 #ifdef amd64 |
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45 #include "sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext.h" |
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46 #endif |
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47 |
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48 #if defined(sparc) || defined(sparcv9) |
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49 #include "sun_jvm_hotspot_debugger_sparc_SPARCThreadContext.h" |
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50 #endif |
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51 |
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52 static jfieldID p_ps_prochandle_ID = 0; |
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53 static jfieldID threadList_ID = 0; |
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54 static jfieldID loadObjectList_ID = 0; |
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55 |
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56 static jmethodID createClosestSymbol_ID = 0; |
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57 static jmethodID createLoadObject_ID = 0; |
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58 static jmethodID getThreadForThreadId_ID = 0; |
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59 static jmethodID listAdd_ID = 0; |
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60 |
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61 #define CHECK_EXCEPTION_(value) if ((*env)->ExceptionOccurred(env)) { return value; } |
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62 #define CHECK_EXCEPTION if ((*env)->ExceptionOccurred(env)) { return;} |
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63 #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throw_new_debugger_exception(env, str); return value; } |
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64 #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throw_new_debugger_exception(env, str); return;} |
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65 |
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66 void throw_new_debugger_exception(JNIEnv* env, const char* errMsg) { |
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67 (*env)->ThrowNew(env, (*env)->FindClass(env, "sun/jvm/hotspot/debugger/DebuggerException"), errMsg); |
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68 } |
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69 |
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70 struct ps_prochandle* get_proc_handle(JNIEnv* env, jobject this_obj) { |
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71 jlong ptr = (*env)->GetLongField(env, this_obj, p_ps_prochandle_ID); |
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72 return (struct ps_prochandle*)(intptr_t)ptr; |
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73 } |
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74 |
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75 /* |
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76 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal |
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77 * Method: init0 |
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78 * Signature: ()V |
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79 */ |
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80 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_init0 |
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81 (JNIEnv *env, jclass cls) { |
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82 jclass listClass; |
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83 |
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84 if (init_libproc(getenv("LIBSAPROC_DEBUG") != NULL) != true) { |
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85 THROW_NEW_DEBUGGER_EXCEPTION("can't initialize libproc"); |
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86 } |
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87 |
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88 // fields we use |
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89 p_ps_prochandle_ID = (*env)->GetFieldID(env, cls, "p_ps_prochandle", "J"); |
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90 CHECK_EXCEPTION; |
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91 threadList_ID = (*env)->GetFieldID(env, cls, "threadList", "Ljava/util/List;"); |
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92 CHECK_EXCEPTION; |
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93 loadObjectList_ID = (*env)->GetFieldID(env, cls, "loadObjectList", "Ljava/util/List;"); |
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94 CHECK_EXCEPTION; |
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95 |
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96 // methods we use |
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97 createClosestSymbol_ID = (*env)->GetMethodID(env, cls, "createClosestSymbol", |
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98 "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;"); |
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99 CHECK_EXCEPTION; |
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100 createLoadObject_ID = (*env)->GetMethodID(env, cls, "createLoadObject", |
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101 "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;"); |
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102 CHECK_EXCEPTION; |
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103 getThreadForThreadId_ID = (*env)->GetMethodID(env, cls, "getThreadForThreadId", |
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104 "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;"); |
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105 CHECK_EXCEPTION; |
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106 // java.util.List method we call |
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107 listClass = (*env)->FindClass(env, "java/util/List"); |
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108 CHECK_EXCEPTION; |
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109 listAdd_ID = (*env)->GetMethodID(env, listClass, "add", "(Ljava/lang/Object;)Z"); |
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110 CHECK_EXCEPTION; |
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111 } |
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112 |
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113 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_getAddressSize |
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114 (JNIEnv *env, jclass cls) |
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115 { |
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116 #ifdef _LP64 |
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117 return 8; |
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118 #else |
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119 return 4; |
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120 #endif |
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121 |
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122 } |
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123 |
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124 |
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125 static void fillThreadsAndLoadObjects(JNIEnv* env, jobject this_obj, struct ps_prochandle* ph) { |
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126 int n = 0, i = 0; |
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127 |
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128 // add threads |
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129 n = get_num_threads(ph); |
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130 for (i = 0; i < n; i++) { |
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131 jobject thread; |
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132 jobject threadList; |
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133 lwpid_t lwpid; |
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134 |
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135 lwpid = get_lwp_id(ph, i); |
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136 thread = (*env)->CallObjectMethod(env, this_obj, getThreadForThreadId_ID, |
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137 (jlong)lwpid); |
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138 CHECK_EXCEPTION; |
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139 threadList = (*env)->GetObjectField(env, this_obj, threadList_ID); |
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140 CHECK_EXCEPTION; |
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141 (*env)->CallBooleanMethod(env, threadList, listAdd_ID, thread); |
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142 CHECK_EXCEPTION; |
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143 } |
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144 |
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145 // add load objects |
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146 n = get_num_libs(ph); |
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147 for (i = 0; i < n; i++) { |
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148 uintptr_t base; |
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149 const char* name; |
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150 jobject loadObject; |
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151 jobject loadObjectList; |
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152 |
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153 base = get_lib_base(ph, i); |
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154 name = get_lib_name(ph, i); |
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155 loadObject = (*env)->CallObjectMethod(env, this_obj, createLoadObject_ID, |
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156 (*env)->NewStringUTF(env, name), (jlong)0, (jlong)base); |
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157 CHECK_EXCEPTION; |
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158 loadObjectList = (*env)->GetObjectField(env, this_obj, loadObjectList_ID); |
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159 CHECK_EXCEPTION; |
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160 (*env)->CallBooleanMethod(env, loadObjectList, listAdd_ID, loadObject); |
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161 CHECK_EXCEPTION; |
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162 } |
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163 } |
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164 |
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165 |
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166 /* |
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167 * Verify that a named ELF binary file (core or executable) has the same |
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168 * bitness as ourselves. |
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169 * Throw an exception if there is a mismatch or other problem. |
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170 * |
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171 * If we proceed using a mismatched debugger/debuggee, the best to hope |
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172 * for is a missing symbol, the worst is a crash searching for debug symbols. |
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173 */ |
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174 void verifyBitness(JNIEnv *env, const char *binaryName) { |
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175 int fd = open(binaryName, O_RDONLY); |
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176 if (fd < 0) { |
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177 THROW_NEW_DEBUGGER_EXCEPTION("cannot open binary file"); |
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178 } |
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179 unsigned char elf_ident[EI_NIDENT]; |
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180 int i = read(fd, &elf_ident, sizeof(elf_ident)); |
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181 close(fd); |
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182 |
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183 if (i < 0) { |
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184 THROW_NEW_DEBUGGER_EXCEPTION("cannot read binary file"); |
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185 } |
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186 #ifndef _LP64 |
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187 if (elf_ident[EI_CLASS] == ELFCLASS64) { |
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188 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 64 bit, use 64-bit java for debugger"); |
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189 } |
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190 #else |
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191 if (elf_ident[EI_CLASS] != ELFCLASS64) { |
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192 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 32 bit, use 32 bit java for debugger"); |
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193 } |
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194 #endif |
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195 } |
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196 |
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197 |
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198 /* |
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199 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal |
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200 * Method: attach0 |
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201 * Signature: (I)V |
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202 */ |
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203 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_attach0__I |
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204 (JNIEnv *env, jobject this_obj, jint jpid) { |
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205 |
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206 // For bitness checking, locate binary at /proc/jpid/exe |
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207 char buf[PATH_MAX]; |
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208 snprintf((char *) &buf, PATH_MAX, "/proc/%d/exe", jpid); |
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209 verifyBitness(env, (char *) &buf); |
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210 CHECK_EXCEPTION; |
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211 |
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212 struct ps_prochandle* ph; |
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213 if ( (ph = Pgrab(jpid)) == NULL) { |
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214 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the process"); |
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215 } |
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216 (*env)->SetLongField(env, this_obj, p_ps_prochandle_ID, (jlong)(intptr_t)ph); |
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217 fillThreadsAndLoadObjects(env, this_obj, ph); |
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218 } |
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219 |
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220 /* |
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221 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal |
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222 * Method: attach0 |
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223 * Signature: (Ljava/lang/String;Ljava/lang/String;)V |
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224 */ |
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225 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2 |
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226 (JNIEnv *env, jobject this_obj, jstring execName, jstring coreName) { |
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227 const char *execName_cstr; |
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228 const char *coreName_cstr; |
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229 jboolean isCopy; |
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230 struct ps_prochandle* ph; |
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231 |
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232 execName_cstr = (*env)->GetStringUTFChars(env, execName, &isCopy); |
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233 CHECK_EXCEPTION; |
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234 coreName_cstr = (*env)->GetStringUTFChars(env, coreName, &isCopy); |
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235 CHECK_EXCEPTION; |
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236 |
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237 verifyBitness(env, execName_cstr); |
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238 CHECK_EXCEPTION; |
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239 |
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240 if ( (ph = Pgrab_core(execName_cstr, coreName_cstr)) == NULL) { |
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241 (*env)->ReleaseStringUTFChars(env, execName, execName_cstr); |
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242 (*env)->ReleaseStringUTFChars(env, coreName, coreName_cstr); |
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243 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the core file"); |
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244 } |
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245 (*env)->SetLongField(env, this_obj, p_ps_prochandle_ID, (jlong)(intptr_t)ph); |
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246 (*env)->ReleaseStringUTFChars(env, execName, execName_cstr); |
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247 (*env)->ReleaseStringUTFChars(env, coreName, coreName_cstr); |
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248 fillThreadsAndLoadObjects(env, this_obj, ph); |
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249 } |
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250 |
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251 /* |
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252 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal |
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253 * Method: detach0 |
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254 * Signature: ()V |
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255 */ |
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256 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_detach0 |
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257 (JNIEnv *env, jobject this_obj) { |
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258 struct ps_prochandle* ph = get_proc_handle(env, this_obj); |
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259 if (ph != NULL) { |
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260 Prelease(ph); |
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261 } |
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262 } |
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263 |
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264 /* |
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265 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal |
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266 * Method: lookupByName0 |
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267 * Signature: (Ljava/lang/String;Ljava/lang/String;)J |
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268 */ |
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269 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_lookupByName0 |
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270 (JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) { |
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271 const char *objectName_cstr, *symbolName_cstr; |
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272 jlong addr; |
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273 jboolean isCopy; |
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274 struct ps_prochandle* ph = get_proc_handle(env, this_obj); |
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275 |
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276 objectName_cstr = NULL; |
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277 if (objectName != NULL) { |
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278 objectName_cstr = (*env)->GetStringUTFChars(env, objectName, &isCopy); |
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279 CHECK_EXCEPTION_(0); |
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280 } |
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281 symbolName_cstr = (*env)->GetStringUTFChars(env, symbolName, &isCopy); |
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282 CHECK_EXCEPTION_(0); |
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283 |
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284 addr = (jlong) lookup_symbol(ph, objectName_cstr, symbolName_cstr); |
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285 |
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286 if (objectName_cstr != NULL) { |
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287 (*env)->ReleaseStringUTFChars(env, objectName, objectName_cstr); |
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288 } |
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289 (*env)->ReleaseStringUTFChars(env, symbolName, symbolName_cstr); |
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290 return addr; |
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291 } |
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292 |
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293 /* |
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294 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal |
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295 * Method: lookupByAddress0 |
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296 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol; |
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297 */ |
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298 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_lookupByAddress0 |
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299 (JNIEnv *env, jobject this_obj, jlong addr) { |
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300 uintptr_t offset; |
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301 const char* sym = NULL; |
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302 |
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303 struct ps_prochandle* ph = get_proc_handle(env, this_obj); |
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304 sym = symbol_for_pc(ph, (uintptr_t) addr, &offset); |
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305 if (sym == NULL) return 0; |
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306 return (*env)->CallObjectMethod(env, this_obj, createClosestSymbol_ID, |
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307 (*env)->NewStringUTF(env, sym), (jlong)offset); |
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308 } |
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309 |
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310 /* |
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311 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal |
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312 * Method: readBytesFromProcess0 |
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313 * Signature: (JJ)Lsun/jvm/hotspot/debugger/ReadResult; |
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314 */ |
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315 JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_readBytesFromProcess0 |
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316 (JNIEnv *env, jobject this_obj, jlong addr, jlong numBytes) { |
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317 |
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318 jboolean isCopy; |
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319 jbyteArray array; |
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320 jbyte *bufPtr; |
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321 ps_err_e err; |
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322 |
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323 array = (*env)->NewByteArray(env, numBytes); |
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324 CHECK_EXCEPTION_(0); |
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325 bufPtr = (*env)->GetByteArrayElements(env, array, &isCopy); |
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326 CHECK_EXCEPTION_(0); |
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327 |
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328 err = ps_pdread(get_proc_handle(env, this_obj), (psaddr_t) (uintptr_t)addr, bufPtr, numBytes); |
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329 (*env)->ReleaseByteArrayElements(env, array, bufPtr, 0); |
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330 return (err == PS_OK)? array : 0; |
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331 } |
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332 |
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333 #if defined(i386) || defined(amd64) || defined(sparc) || defined(sparcv9) |
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334 JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_getThreadIntegerRegisterSet0 |
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335 (JNIEnv *env, jobject this_obj, jint lwp_id) { |
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336 |
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337 struct user_regs_struct gregs; |
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338 jboolean isCopy; |
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339 jlongArray array; |
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340 jlong *regs; |
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341 int i; |
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342 |
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343 struct ps_prochandle* ph = get_proc_handle(env, this_obj); |
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344 if (get_lwp_regs(ph, lwp_id, &gregs) != true) { |
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345 THROW_NEW_DEBUGGER_EXCEPTION_("get_thread_regs failed for a lwp", 0); |
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346 } |
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347 |
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348 #undef NPRGREG |
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349 #ifdef i386 |
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350 #define NPRGREG sun_jvm_hotspot_debugger_x86_X86ThreadContext_NPRGREG |
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351 #endif |
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352 #ifdef amd64 |
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353 #define NPRGREG sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_NPRGREG |
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354 #endif |
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355 #if defined(sparc) || defined(sparcv9) |
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356 #define NPRGREG sun_jvm_hotspot_debugger_sparc_SPARCThreadContext_NPRGREG |
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357 #endif |
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358 |
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359 array = (*env)->NewLongArray(env, NPRGREG); |
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360 CHECK_EXCEPTION_(0); |
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361 regs = (*env)->GetLongArrayElements(env, array, &isCopy); |
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362 |
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363 #undef REG_INDEX |
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364 |
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365 #ifdef i386 |
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366 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_x86_X86ThreadContext_##reg |
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367 |
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368 regs[REG_INDEX(GS)] = (uintptr_t) gregs.xgs; |
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369 regs[REG_INDEX(FS)] = (uintptr_t) gregs.xfs; |
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370 regs[REG_INDEX(ES)] = (uintptr_t) gregs.xes; |
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371 regs[REG_INDEX(DS)] = (uintptr_t) gregs.xds; |
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372 regs[REG_INDEX(EDI)] = (uintptr_t) gregs.edi; |
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373 regs[REG_INDEX(ESI)] = (uintptr_t) gregs.esi; |
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374 regs[REG_INDEX(FP)] = (uintptr_t) gregs.ebp; |
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375 regs[REG_INDEX(SP)] = (uintptr_t) gregs.esp; |
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376 regs[REG_INDEX(EBX)] = (uintptr_t) gregs.ebx; |
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377 regs[REG_INDEX(EDX)] = (uintptr_t) gregs.edx; |
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378 regs[REG_INDEX(ECX)] = (uintptr_t) gregs.ecx; |
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379 regs[REG_INDEX(EAX)] = (uintptr_t) gregs.eax; |
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380 regs[REG_INDEX(PC)] = (uintptr_t) gregs.eip; |
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381 regs[REG_INDEX(CS)] = (uintptr_t) gregs.xcs; |
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382 regs[REG_INDEX(SS)] = (uintptr_t) gregs.xss; |
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383 |
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384 #endif /* i386 */ |
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385 |
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386 #ifdef amd64 |
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387 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_##reg |
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388 |
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389 regs[REG_INDEX(R15)] = gregs.r15; |
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390 regs[REG_INDEX(R14)] = gregs.r14; |
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391 regs[REG_INDEX(R13)] = gregs.r13; |
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392 regs[REG_INDEX(R12)] = gregs.r12; |
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393 regs[REG_INDEX(RBP)] = gregs.rbp; |
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394 regs[REG_INDEX(RBX)] = gregs.rbx; |
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395 regs[REG_INDEX(R11)] = gregs.r11; |
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396 regs[REG_INDEX(R10)] = gregs.r10; |
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397 regs[REG_INDEX(R9)] = gregs.r9; |
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398 regs[REG_INDEX(R8)] = gregs.r8; |
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399 regs[REG_INDEX(RAX)] = gregs.rax; |
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400 regs[REG_INDEX(RCX)] = gregs.rcx; |
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401 regs[REG_INDEX(RDX)] = gregs.rdx; |
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402 regs[REG_INDEX(RSI)] = gregs.rsi; |
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403 regs[REG_INDEX(RDI)] = gregs.rdi; |
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404 regs[REG_INDEX(RIP)] = gregs.rip; |
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405 regs[REG_INDEX(CS)] = gregs.cs; |
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406 regs[REG_INDEX(RSP)] = gregs.rsp; |
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407 regs[REG_INDEX(SS)] = gregs.ss; |
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408 regs[REG_INDEX(FSBASE)] = gregs.fs_base; |
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409 regs[REG_INDEX(GSBASE)] = gregs.gs_base; |
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410 regs[REG_INDEX(DS)] = gregs.ds; |
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411 regs[REG_INDEX(ES)] = gregs.es; |
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412 regs[REG_INDEX(FS)] = gregs.fs; |
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413 regs[REG_INDEX(GS)] = gregs.gs; |
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414 |
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415 #endif /* amd64 */ |
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416 |
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417 #if defined(sparc) || defined(sparcv9) |
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418 |
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419 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_sparc_SPARCThreadContext_##reg |
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420 |
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421 #ifdef _LP64 |
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422 regs[REG_INDEX(R_PSR)] = gregs.tstate; |
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423 regs[REG_INDEX(R_PC)] = gregs.tpc; |
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424 regs[REG_INDEX(R_nPC)] = gregs.tnpc; |
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425 regs[REG_INDEX(R_Y)] = gregs.y; |
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426 #else |
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427 regs[REG_INDEX(R_PSR)] = gregs.psr; |
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428 regs[REG_INDEX(R_PC)] = gregs.pc; |
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429 regs[REG_INDEX(R_nPC)] = gregs.npc; |
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430 regs[REG_INDEX(R_Y)] = gregs.y; |
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431 #endif |
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432 regs[REG_INDEX(R_G0)] = 0 ; |
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433 regs[REG_INDEX(R_G1)] = gregs.u_regs[0]; |
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434 regs[REG_INDEX(R_G2)] = gregs.u_regs[1]; |
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435 regs[REG_INDEX(R_G3)] = gregs.u_regs[2]; |
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436 regs[REG_INDEX(R_G4)] = gregs.u_regs[3]; |
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437 regs[REG_INDEX(R_G5)] = gregs.u_regs[4]; |
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438 regs[REG_INDEX(R_G6)] = gregs.u_regs[5]; |
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439 regs[REG_INDEX(R_G7)] = gregs.u_regs[6]; |
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440 regs[REG_INDEX(R_O0)] = gregs.u_regs[7]; |
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441 regs[REG_INDEX(R_O1)] = gregs.u_regs[8]; |
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442 regs[REG_INDEX(R_O2)] = gregs.u_regs[ 9]; |
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443 regs[REG_INDEX(R_O3)] = gregs.u_regs[10]; |
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444 regs[REG_INDEX(R_O4)] = gregs.u_regs[11]; |
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445 regs[REG_INDEX(R_O5)] = gregs.u_regs[12]; |
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446 regs[REG_INDEX(R_O6)] = gregs.u_regs[13]; |
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447 regs[REG_INDEX(R_O7)] = gregs.u_regs[14]; |
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448 #endif /* sparc */ |
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449 |
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450 |
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451 (*env)->ReleaseLongArrayElements(env, array, regs, JNI_COMMIT); |
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452 return array; |
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453 } |
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454 #endif |