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4006
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1 /*
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2 * Copyright (c) 2002, 2007, 2011, 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 <objc/objc-runtime.h>
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26 #import <Foundation/Foundation.h>
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27 #import <JavaNativeFoundation/JavaNativeFoundation.h>
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28
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29 #include <JavaVM/jni.h>
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30
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31 #import <mach/mach.h>
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32 #import <mach/mach_types.h>
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33 #import <sys/sysctl.h>
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34 #import <stdlib.h>
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35
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36 jboolean debug = JNI_FALSE;
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37
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38 static jfieldID symbolicatorID = 0; // set in _init0
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39 static jfieldID taskID = 0; // set in _init0
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40
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41 static void putSymbolicator(JNIEnv *env, jobject this_obj, id symbolicator) {
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42 (*env)->SetLongField(env, this_obj, symbolicatorID, (jlong)(intptr_t)symbolicator);
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43 }
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44
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45 static id getSymbolicator(JNIEnv *env, jobject this_obj) {
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46 jlong ptr = (*env)->GetLongField(env, this_obj, symbolicatorID);
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47 return (id)(intptr_t)ptr;
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48 }
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49
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50 static void putTask(JNIEnv *env, jobject this_obj, task_t task) {
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51 (*env)->SetLongField(env, this_obj, taskID, (jlong)task);
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52 }
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53
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54 static task_t getTask(JNIEnv *env, jobject this_obj) {
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55 jlong ptr = (*env)->GetLongField(env, this_obj, taskID);
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56 return (task_t)ptr;
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57 }
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58
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59 #define CHECK_EXCEPTION_(value) if ((*env)->ExceptionOccurred(env)) { return value; }
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60 #define CHECK_EXCEPTION if ((*env)->ExceptionOccurred(env)) { return;}
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61 #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throw_new_debugger_exception(env, str); return value; }
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62 #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throw_new_debugger_exception(env, str); return;}
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63
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64 static void throw_new_debugger_exception(JNIEnv* env, const char* errMsg) {
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65 (*env)->ThrowNew(env, (*env)->FindClass(env, "sun/jvm/hotspot/debugger/DebuggerException"), errMsg);
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66 }
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67
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68 #if defined(__i386__)
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69 #define hsdb_thread_state_t x86_thread_state32_t
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70 #define hsdb_float_state_t x86_float_state32_t
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71 #define HSDB_THREAD_STATE x86_THREAD_STATE32
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72 #define HSDB_FLOAT_STATE x86_FLOAT_STATE32
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73 #define HSDB_THREAD_STATE_COUNT x86_THREAD_STATE32_COUNT
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74 #define HSDB_FLOAT_STATE_COUNT x86_FLOAT_STATE32_COUNT
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75 #elif defined(__x86_64__)
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76 #define hsdb_thread_state_t x86_thread_state64_t
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77 #define hsdb_float_state_t x86_float_state64_t
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78 #define HSDB_THREAD_STATE x86_THREAD_STATE64
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79 #define HSDB_FLOAT_STATE x86_FLOAT_STATE64
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80 #define HSDB_THREAD_STATE_COUNT x86_THREAD_STATE64_COUNT
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81 #define HSDB_FLOAT_STATE_COUNT x86_FLOAT_STATE64_COUNT
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82 #else
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83 #error "Unsupported architecture"
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84 #endif
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85
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86 /*
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87 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
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88 * Method: init0
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89 * Signature: ()V
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90 */
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91 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_init0(JNIEnv *env, jclass cls) {
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92 symbolicatorID = (*env)->GetFieldID(env, cls, "symbolicator", "J");
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93 taskID = (*env)->GetFieldID(env, cls, "task", "J");
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94 CHECK_EXCEPTION;
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95 }
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96
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97 /*
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98 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
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99 * Method: lookupByName0
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100 * Signature: (Ljava/lang/String;Ljava/lang/String;)J
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101 */
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102 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByName0(JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) {
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103 jlong address = 0;
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104
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105 JNF_COCOA_ENTER(env);
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106 NSString *symbolNameString = JNFJavaToNSString(env, symbolName);
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107
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108 if (debug) {
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109 printf("lookupInProcess called for %s\n", [symbolNameString UTF8String]);
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110 }
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111
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112 id symbolicator = getSymbolicator(env, this_obj);
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113 if (symbolicator != nil) {
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114 uint64_t (*dynamicCall)(id, SEL, NSString *) = (uint64_t (*)(id, SEL, NSString *))&objc_msgSend;
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115 address = (jlong) dynamicCall(symbolicator, @selector(addressForSymbol:), symbolNameString);
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116 }
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117
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118 if (debug) {
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119 printf("address of symbol %s = %llx\n", [symbolNameString UTF8String], address);
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120 }
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121 JNF_COCOA_EXIT(env);
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122
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123 return address;
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124 }
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125
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126 /*
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127 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
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128 * Method: readBytesFromProcess0
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129 * Signature: (JJ)Lsun/jvm/hotspot/debugger/ReadResult;
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130 */
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131 JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_readBytesFromProcess0(JNIEnv *env, jobject this_obj, jlong addr, jlong numBytes) {
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132 if (debug) printf("readBytesFromProcess called. addr = %llx numBytes = %lld\n", addr, numBytes);
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133
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134 // must allocate storage instead of using former parameter buf
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135 jboolean isCopy;
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136 jbyteArray array;
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137 jbyte *bufPtr;
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138
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139 array = (*env)->NewByteArray(env, numBytes);
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140 CHECK_EXCEPTION_(0);
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141
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142 unsigned long alignedAddress;
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143 unsigned long alignedLength;
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144 kern_return_t result;
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145 vm_offset_t *pages;
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146 int *mapped;
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147 long pageCount;
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148 uint byteCount;
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149 int i;
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150 unsigned long remaining;
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151
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152 alignedAddress = trunc_page(addr);
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153 if (addr != alignedAddress) {
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154 alignedLength += addr - alignedAddress;
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155 }
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156 alignedLength = round_page(numBytes);
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157 pageCount = alignedLength/vm_page_size;
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158
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159 // Allocate storage for pages and flags.
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160 pages = malloc(pageCount * sizeof(vm_offset_t));
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161 mapped = calloc(pageCount, sizeof(int));
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162
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163 task_t gTask = getTask(env, this_obj);
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164 // Try to read each of the pages.
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165 for (i = 0; i < pageCount; i++) {
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166 result = vm_read(gTask, alignedAddress + i*vm_page_size, vm_page_size,
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167 &pages[i], &byteCount);
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168 mapped[i] = (result == KERN_SUCCESS);
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169 // assume all failures are unmapped pages
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170 }
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171
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172 if (debug) fprintf(stderr, "%ld pages\n", pageCount);
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173
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174 remaining = numBytes;
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175
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176 for (i = 0; i < pageCount; i++) {
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177 unsigned long len = vm_page_size;
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178 unsigned long start = 0;
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179
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180 if (i == 0) {
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181 start = addr - alignedAddress;
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182 len = vm_page_size - start;
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183 }
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184
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185 if (i == (pageCount - 1)) {
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186 len = remaining;
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187 }
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188
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189 if (mapped[i]) {
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190 if (debug) fprintf(stderr, "page %d mapped (len %ld start %ld)\n", i, len, start);
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191 (*env)->SetByteArrayRegion(env, array, 0, len, ((jbyte *) pages[i] + start));
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192 vm_deallocate(mach_task_self(), pages[i], vm_page_size);
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193 }
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194
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195 remaining -= len;
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196 }
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197
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198 free (pages);
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199 free (mapped);
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200 return array;
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201 }
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202
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203 /*
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204 * Class: sun_jvm_hotspot_debugger_macosx_MacOSXDebuggerLocal
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205 * Method: getThreadIntegerRegisterSet0
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206 * Signature: (I)[J
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207 */
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208 JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getThreadIntegerRegisterSet0(JNIEnv *env, jobject this_obj, jint lwp_id) {
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209 if (debug)
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210 printf("getThreadRegisterSet0 called\n");
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211
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212 kern_return_t result;
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213 thread_t tid;
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214 mach_msg_type_number_t count = HSDB_THREAD_STATE_COUNT;
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215 hsdb_thread_state_t state;
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216 unsigned int *r;
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217 int i;
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218 jlongArray registerArray;
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219 jlong *primitiveArray;
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220
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221 tid = lwp_id;
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222
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223 result = thread_get_state(tid, HSDB_THREAD_STATE, (thread_state_t)&state, &count);
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224
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225 if (result != KERN_SUCCESS) {
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226 if (debug)
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227 printf("getregs: thread_get_state(%d) failed (%d)\n", tid, result);
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228 return NULL;
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229 }
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230
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231 // 40 32-bit registers on ppc, 16 on x86.
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232 // Output order is the same as the order in the ppc_thread_state/i386_thread_state struct.
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233 #if defined(__i386__)
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234 r = (unsigned int *)&state;
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235 registerArray = (*env)->NewLongArray(env, 8);
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236 primitiveArray = (*env)->GetLongArrayElements(env, registerArray, NULL);
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237 primitiveArray[0] = r[0]; // eax
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238 primitiveArray[1] = r[2]; // ecx
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239 primitiveArray[2] = r[3]; // edx
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240 primitiveArray[3] = r[1]; // ebx
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241 primitiveArray[4] = r[7]; // esp
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242 primitiveArray[5] = r[6]; // ebp
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243 primitiveArray[6] = r[5]; // esi
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244 primitiveArray[7] = r[4]; // edi
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245 (*env)->ReleaseLongArrayElements(env, registerArray, primitiveArray, 0);
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246 #elif defined(__x86_64__)
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247 /* From AMD64ThreadContext.java
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248 public static final int R15 = 0;
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249 public static final int R14 = 1;
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250 public static final int R13 = 2;
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251 public static final int R12 = 3;
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252 public static final int R11 = 4;
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253 public static final int R10 = 5;
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254 public static final int R9 = 6;
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255 public static final int R8 = 7;
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256 public static final int RDI = 8;
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257 public static final int RSI = 9;
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258 public static final int RBP = 10;
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259 public static final int RBX = 11;
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260 public static final int RDX = 12;
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261 public static final int RCX = 13;
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262 public static final int RAX = 14;
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263 public static final int TRAPNO = 15;
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264 public static final int ERR = 16;
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265 public static final int RIP = 17;
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266 public static final int CS = 18;
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267 public static final int RFL = 19;
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268 public static final int RSP = 20;
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269 public static final int SS = 21;
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270 public static final int FS = 22;
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271 public static final int GS = 23;
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272 public static final int ES = 24;
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273 public static final int DS = 25;
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274 public static final int FSBASE = 26;
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275 public static final int GSBASE = 27;
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276 */
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277 // 64 bit
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278 if (debug) printf("Getting threads for a 64-bit process\n");
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279 registerArray = (*env)->NewLongArray(env, 28);
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280 primitiveArray = (*env)->GetLongArrayElements(env, registerArray, NULL);
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281
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282 primitiveArray[0] = state.__r15;
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283 primitiveArray[1] = state.__r14;
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284 primitiveArray[2] = state.__r13;
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285 primitiveArray[3] = state.__r12;
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286 primitiveArray[4] = state.__r11;
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287 primitiveArray[5] = state.__r10;
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288 primitiveArray[6] = state.__r9;
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289 primitiveArray[7] = state.__r8;
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290 primitiveArray[8] = state.__rdi;
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291 primitiveArray[9] = state.__rsi;
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292 primitiveArray[10] = state.__rbp;
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293 primitiveArray[11] = state.__rbx;
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294 primitiveArray[12] = state.__rdx;
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295 primitiveArray[13] = state.__rcx;
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296 primitiveArray[14] = state.__rax;
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297 primitiveArray[15] = 0; // trapno ?
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298 primitiveArray[16] = 0; // err ?
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299 primitiveArray[17] = state.__rip;
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300 primitiveArray[18] = state.__cs;
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301 primitiveArray[19] = state.__rflags;
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302 primitiveArray[20] = state.__rsp;
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303 primitiveArray[21] = 0; // We don't have SS
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304 primitiveArray[22] = state.__fs;
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305 primitiveArray[23] = state.__gs;
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306 primitiveArray[24] = 0;
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307 primitiveArray[25] = 0;
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308 primitiveArray[26] = 0;
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309 primitiveArray[27] = 0;
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310
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311 if (debug) printf("set registers\n");
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312
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313 (*env)->ReleaseLongArrayElements(env, registerArray, primitiveArray, 0);
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314 #else
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315 #error Unsupported architecture
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316 #endif
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317
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318 return registerArray;
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319 }
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320
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321 /*
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322 * Class: sun_jvm_hotspot_debugger_macosx_MacOSXDebuggerLocal
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323 * Method: translateTID0
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324 * Signature: (I)I
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325 */
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326 JNIEXPORT jint JNICALL
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327 Java_sun_jvm_hotspot_debugger_macosx_MacOSXDebuggerLocal_translateTID0(JNIEnv *env, jobject this_obj, jint tid) {
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328 if (debug)
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329 printf("translateTID0 called on tid = 0x%x\n", (int)tid);
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330
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331 kern_return_t result;
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332 thread_t foreign_tid, usable_tid;
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333 mach_msg_type_name_t type;
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334
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335 foreign_tid = tid;
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336
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337 task_t gTask = getTask(env, this_obj);
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338 result = mach_port_extract_right(gTask, foreign_tid,
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339 MACH_MSG_TYPE_COPY_SEND,
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340 &usable_tid, &type);
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341 if (result != KERN_SUCCESS)
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342 return -1;
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343
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344 if (debug)
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345 printf("translateTID0: 0x%x -> 0x%x\n", foreign_tid, usable_tid);
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346
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347 return (jint) usable_tid;
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348 }
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349
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350 /*
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351 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
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352 * Method: attach0
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353 * Signature: (I)V
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354 */
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355 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__I(JNIEnv *env, jobject this_obj, jint jpid) {
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356 JNF_COCOA_ENTER(env);
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357 if (getenv("JAVA_SAPROC_DEBUG") != NULL)
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358 debug = JNI_TRUE;
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359 else
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360 debug = JNI_FALSE;
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361 if (debug) printf("attach0 called for jpid=%d\n", (int)jpid);
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362
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363 kern_return_t result;
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364 task_t gTask = 0;
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365 result = task_for_pid(mach_task_self(), jpid, &gTask);
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366 if (result != KERN_SUCCESS) {
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367 fprintf(stderr, "attach: task_for_pid(%d) failed (%d)\n", (int)jpid, result);
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368 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the process");
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369 }
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370 putTask(env, this_obj, gTask);
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371
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372 id symbolicator = nil;
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373 id jrsSymbolicator = objc_lookUpClass("JRSSymbolicator");
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374 if (jrsSymbolicator != nil) {
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375 id (*dynamicCall)(id, SEL, pid_t) = (id (*)(id, SEL, pid_t))&objc_msgSend;
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376 symbolicator = dynamicCall(jrsSymbolicator, @selector(symbolicatorForPid:), (pid_t)jpid);
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377 }
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378 if (symbolicator != nil) {
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379 CFRetain(symbolicator); // pin symbolicator while in java heap
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380 }
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381
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382 putSymbolicator(env, this_obj, symbolicator);
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383 if (symbolicator == nil) {
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384 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach symbolicator to the process");
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385 }
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386
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387 JNF_COCOA_EXIT(env);
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388 }
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389
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390 /*
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391 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
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392 * Method: detach0
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393 * Signature: ()V
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394 */
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395 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_detach0(JNIEnv *env, jobject this_obj) {
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396 JNF_COCOA_ENTER(env);
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397 if (debug) printf("detach0 called\n");
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398
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399 task_t gTask = getTask(env, this_obj);
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400 mach_port_deallocate(mach_task_self(), gTask);
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401 id symbolicator = getSymbolicator(env, this_obj);
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402 if (symbolicator != nil) {
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403 CFRelease(symbolicator);
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404 }
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405 JNF_COCOA_EXIT(env);
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406 }
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