Mercurial > hg > truffle
annotate agent/src/os/bsd/MacosxDebuggerLocal.m @ 8062:5d5c577296fd
8008102: SA on OS X does not stop the attached process
Reviewed-by: dholmes, rbackman
| author | sla |
|---|---|
| date | Fri, 15 Feb 2013 08:54:12 +0100 |
| parents | 758935f7c23f |
| children | 40b7c6b800ab |
| rev | line source |
|---|---|
| 4006 | 1 /* |
| 6782 | 2 * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved. |
| 4006 | 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 <objc/objc-runtime.h> | |
| 26 #import <Foundation/Foundation.h> | |
| 27 #import <JavaNativeFoundation/JavaNativeFoundation.h> | |
| 28 | |
| 29 #include <JavaVM/jni.h> | |
| 30 | |
| 31 #import <mach/mach.h> | |
| 32 #import <mach/mach_types.h> | |
| 33 #import <sys/sysctl.h> | |
| 6782 | 34 #import <stdio.h> |
| 35 #import <stdarg.h> | |
| 4006 | 36 #import <stdlib.h> |
| 6782 | 37 #import <strings.h> |
| 38 #import <dlfcn.h> | |
| 39 #import <limits.h> | |
| 40 #import <errno.h> | |
|
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41 #import <sys/types.h> |
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42 #import <sys/ptrace.h> |
| 4006 | 43 |
| 44 jboolean debug = JNI_FALSE; | |
| 45 | |
| 46 static jfieldID symbolicatorID = 0; // set in _init0 | |
| 47 static jfieldID taskID = 0; // set in _init0 | |
| 48 | |
| 49 static void putSymbolicator(JNIEnv *env, jobject this_obj, id symbolicator) { | |
| 50 (*env)->SetLongField(env, this_obj, symbolicatorID, (jlong)(intptr_t)symbolicator); | |
| 51 } | |
| 52 | |
| 53 static id getSymbolicator(JNIEnv *env, jobject this_obj) { | |
| 54 jlong ptr = (*env)->GetLongField(env, this_obj, symbolicatorID); | |
| 55 return (id)(intptr_t)ptr; | |
| 56 } | |
| 57 | |
| 58 static void putTask(JNIEnv *env, jobject this_obj, task_t task) { | |
| 59 (*env)->SetLongField(env, this_obj, taskID, (jlong)task); | |
| 60 } | |
| 61 | |
| 62 static task_t getTask(JNIEnv *env, jobject this_obj) { | |
| 63 jlong ptr = (*env)->GetLongField(env, this_obj, taskID); | |
| 64 return (task_t)ptr; | |
| 65 } | |
| 66 | |
| 67 #define CHECK_EXCEPTION_(value) if ((*env)->ExceptionOccurred(env)) { return value; } | |
| 68 #define CHECK_EXCEPTION if ((*env)->ExceptionOccurred(env)) { return;} | |
| 69 #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throw_new_debugger_exception(env, str); return value; } | |
| 70 #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throw_new_debugger_exception(env, str); return;} | |
| 6782 | 71 #define CHECK_EXCEPTION_CLEAR if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); } |
| 72 #define CHECK_EXCEPTION_CLEAR_VOID if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); return; } | |
| 73 #define CHECK_EXCEPTION_CLEAR_(value) if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); return value; } | |
| 4006 | 74 |
| 75 static void throw_new_debugger_exception(JNIEnv* env, const char* errMsg) { | |
| 76 (*env)->ThrowNew(env, (*env)->FindClass(env, "sun/jvm/hotspot/debugger/DebuggerException"), errMsg); | |
| 77 } | |
| 78 | |
| 79 #if defined(__i386__) | |
| 80 #define hsdb_thread_state_t x86_thread_state32_t | |
| 81 #define hsdb_float_state_t x86_float_state32_t | |
| 82 #define HSDB_THREAD_STATE x86_THREAD_STATE32 | |
| 83 #define HSDB_FLOAT_STATE x86_FLOAT_STATE32 | |
| 84 #define HSDB_THREAD_STATE_COUNT x86_THREAD_STATE32_COUNT | |
| 85 #define HSDB_FLOAT_STATE_COUNT x86_FLOAT_STATE32_COUNT | |
| 86 #elif defined(__x86_64__) | |
| 87 #define hsdb_thread_state_t x86_thread_state64_t | |
| 88 #define hsdb_float_state_t x86_float_state64_t | |
| 89 #define HSDB_THREAD_STATE x86_THREAD_STATE64 | |
| 90 #define HSDB_FLOAT_STATE x86_FLOAT_STATE64 | |
| 91 #define HSDB_THREAD_STATE_COUNT x86_THREAD_STATE64_COUNT | |
| 92 #define HSDB_FLOAT_STATE_COUNT x86_FLOAT_STATE64_COUNT | |
| 93 #else | |
| 94 #error "Unsupported architecture" | |
| 95 #endif | |
| 96 | |
| 97 /* | |
| 98 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal | |
| 99 * Method: init0 | |
| 100 * Signature: ()V | |
| 101 */ | |
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102 JNIEXPORT void JNICALL |
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103 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_init0(JNIEnv *env, jclass cls) { |
| 4006 | 104 symbolicatorID = (*env)->GetFieldID(env, cls, "symbolicator", "J"); |
| 105 taskID = (*env)->GetFieldID(env, cls, "task", "J"); | |
| 106 CHECK_EXCEPTION; | |
| 107 } | |
| 108 | |
| 109 /* | |
| 110 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal | |
| 111 * Method: lookupByName0 | |
| 112 * Signature: (Ljava/lang/String;Ljava/lang/String;)J | |
| 113 */ | |
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114 JNIEXPORT jlong JNICALL |
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115 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByName0( |
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116 JNIEnv *env, jobject this_obj, |
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117 jstring objectName, jstring symbolName) |
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118 { |
| 4006 | 119 jlong address = 0; |
| 120 | |
| 121 JNF_COCOA_ENTER(env); | |
| 122 NSString *symbolNameString = JNFJavaToNSString(env, symbolName); | |
| 123 | |
| 124 if (debug) { | |
| 125 printf("lookupInProcess called for %s\n", [symbolNameString UTF8String]); | |
| 126 } | |
| 127 | |
| 128 id symbolicator = getSymbolicator(env, this_obj); | |
| 129 if (symbolicator != nil) { | |
| 130 uint64_t (*dynamicCall)(id, SEL, NSString *) = (uint64_t (*)(id, SEL, NSString *))&objc_msgSend; | |
| 131 address = (jlong) dynamicCall(symbolicator, @selector(addressForSymbol:), symbolNameString); | |
| 132 } | |
| 133 | |
| 134 if (debug) { | |
| 135 printf("address of symbol %s = %llx\n", [symbolNameString UTF8String], address); | |
| 136 } | |
| 137 JNF_COCOA_EXIT(env); | |
| 138 | |
| 139 return address; | |
| 140 } | |
| 141 | |
| 142 /* | |
| 143 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal | |
| 144 * Method: readBytesFromProcess0 | |
| 145 * Signature: (JJ)Lsun/jvm/hotspot/debugger/ReadResult; | |
| 146 */ | |
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147 JNIEXPORT jbyteArray JNICALL |
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148 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_readBytesFromProcess0( |
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149 JNIEnv *env, jobject this_obj, |
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150 jlong addr, jlong numBytes) |
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151 { |
| 4006 | 152 if (debug) printf("readBytesFromProcess called. addr = %llx numBytes = %lld\n", addr, numBytes); |
| 153 | |
| 154 // must allocate storage instead of using former parameter buf | |
| 155 jboolean isCopy; | |
| 156 jbyteArray array; | |
| 157 jbyte *bufPtr; | |
| 158 | |
| 159 array = (*env)->NewByteArray(env, numBytes); | |
| 160 CHECK_EXCEPTION_(0); | |
| 161 | |
| 162 unsigned long alignedAddress; | |
| 163 unsigned long alignedLength; | |
| 164 kern_return_t result; | |
| 165 vm_offset_t *pages; | |
| 166 int *mapped; | |
| 167 long pageCount; | |
| 168 uint byteCount; | |
| 169 int i; | |
| 170 unsigned long remaining; | |
| 171 | |
| 172 alignedAddress = trunc_page(addr); | |
| 173 if (addr != alignedAddress) { | |
| 174 alignedLength += addr - alignedAddress; | |
| 175 } | |
| 176 alignedLength = round_page(numBytes); | |
| 177 pageCount = alignedLength/vm_page_size; | |
| 178 | |
| 179 // Allocate storage for pages and flags. | |
| 180 pages = malloc(pageCount * sizeof(vm_offset_t)); | |
| 181 mapped = calloc(pageCount, sizeof(int)); | |
| 182 | |
| 183 task_t gTask = getTask(env, this_obj); | |
| 184 // Try to read each of the pages. | |
| 185 for (i = 0; i < pageCount; i++) { | |
| 186 result = vm_read(gTask, alignedAddress + i*vm_page_size, vm_page_size, | |
| 187 &pages[i], &byteCount); | |
| 188 mapped[i] = (result == KERN_SUCCESS); | |
| 189 // assume all failures are unmapped pages | |
| 190 } | |
| 191 | |
| 192 if (debug) fprintf(stderr, "%ld pages\n", pageCount); | |
| 193 | |
| 194 remaining = numBytes; | |
| 195 | |
| 196 for (i = 0; i < pageCount; i++) { | |
| 197 unsigned long len = vm_page_size; | |
| 198 unsigned long start = 0; | |
| 199 | |
| 200 if (i == 0) { | |
| 201 start = addr - alignedAddress; | |
| 202 len = vm_page_size - start; | |
| 203 } | |
| 204 | |
| 205 if (i == (pageCount - 1)) { | |
| 206 len = remaining; | |
| 207 } | |
| 208 | |
| 209 if (mapped[i]) { | |
| 210 if (debug) fprintf(stderr, "page %d mapped (len %ld start %ld)\n", i, len, start); | |
| 211 (*env)->SetByteArrayRegion(env, array, 0, len, ((jbyte *) pages[i] + start)); | |
| 212 vm_deallocate(mach_task_self(), pages[i], vm_page_size); | |
| 213 } | |
| 214 | |
| 215 remaining -= len; | |
| 216 } | |
| 217 | |
| 218 free (pages); | |
| 219 free (mapped); | |
| 220 return array; | |
| 221 } | |
| 222 | |
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223 |
| 4006 | 224 /* |
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225 * Lookup the thread_t that corresponds to the given thread_id. |
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226 * The thread_id should be the result from calling thread_info() with THREAD_IDENTIFIER_INFO |
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227 * and reading the m_ident_info.thread_id returned. |
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228 * The returned thread_t is the mach send right to the kernel port for the corresponding thread. |
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229 * |
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230 * We cannot simply use the OSThread._thread_id field in the JVM. This is set to ::mach_thread_self() |
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231 * in the VM, but that thread port is not valid for a remote debugger to access the thread. |
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232 */ |
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233 thread_t |
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234 lookupThreadFromThreadId(task_t task, jlong thread_id) { |
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235 if (debug) { |
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236 printf("lookupThreadFromThreadId thread_id=0x%llx\n", thread_id); |
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237 } |
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238 |
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239 thread_array_t thread_list = NULL; |
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240 mach_msg_type_number_t thread_list_count = 0; |
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241 thread_t result_thread = 0; |
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242 int i; |
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243 |
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244 // get the list of all the send rights |
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245 kern_return_t result = task_threads(task, &thread_list, &thread_list_count); |
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246 if (result != KERN_SUCCESS) { |
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247 if (debug) { |
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248 printf("task_threads returned 0x%x\n", result); |
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249 } |
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250 return 0; |
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251 } |
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252 |
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253 for(i = 0 ; i < thread_list_count; i++) { |
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254 thread_identifier_info_data_t m_ident_info; |
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255 mach_msg_type_number_t count = THREAD_IDENTIFIER_INFO_COUNT; |
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256 |
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257 // get the THREAD_IDENTIFIER_INFO for the send right |
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258 result = thread_info(thread_list[i], THREAD_IDENTIFIER_INFO, (thread_info_t) &m_ident_info, &count); |
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259 if (result != KERN_SUCCESS) { |
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260 if (debug) { |
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261 printf("thread_info returned 0x%x\n", result); |
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262 } |
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263 break; |
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264 } |
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265 |
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266 // if this is the one we're looking for, return the send right |
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267 if (thread_id == m_ident_info.thread_id) |
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268 { |
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269 result_thread = thread_list[i]; |
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270 break; |
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271 } |
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272 } |
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273 |
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274 vm_size_t thread_list_size = (vm_size_t) (thread_list_count * sizeof (thread_t)); |
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275 vm_deallocate(mach_task_self(), (vm_address_t) thread_list, thread_list_count); |
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276 |
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277 return result_thread; |
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278 } |
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279 |
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280 |
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281 /* |
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282 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal |
| 4006 | 283 * Method: getThreadIntegerRegisterSet0 |
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284 * Signature: (J)[J |
| 4006 | 285 */ |
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286 JNIEXPORT jlongArray JNICALL |
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287 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getThreadIntegerRegisterSet0( |
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288 JNIEnv *env, jobject this_obj, |
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289 jlong thread_id) |
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290 { |
| 4006 | 291 if (debug) |
| 292 printf("getThreadRegisterSet0 called\n"); | |
| 293 | |
| 294 kern_return_t result; | |
| 295 thread_t tid; | |
| 296 mach_msg_type_number_t count = HSDB_THREAD_STATE_COUNT; | |
| 297 hsdb_thread_state_t state; | |
| 298 unsigned int *r; | |
| 299 int i; | |
| 300 jlongArray registerArray; | |
| 301 jlong *primitiveArray; | |
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302 task_t gTask = getTask(env, this_obj); |
| 4006 | 303 |
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304 tid = lookupThreadFromThreadId(gTask, thread_id); |
| 4006 | 305 |
| 306 result = thread_get_state(tid, HSDB_THREAD_STATE, (thread_state_t)&state, &count); | |
| 307 | |
| 308 if (result != KERN_SUCCESS) { | |
| 309 if (debug) | |
| 310 printf("getregs: thread_get_state(%d) failed (%d)\n", tid, result); | |
| 311 return NULL; | |
| 312 } | |
| 313 | |
| 314 // 40 32-bit registers on ppc, 16 on x86. | |
| 315 // Output order is the same as the order in the ppc_thread_state/i386_thread_state struct. | |
| 316 #if defined(__i386__) | |
| 317 r = (unsigned int *)&state; | |
| 318 registerArray = (*env)->NewLongArray(env, 8); | |
| 319 primitiveArray = (*env)->GetLongArrayElements(env, registerArray, NULL); | |
| 320 primitiveArray[0] = r[0]; // eax | |
| 321 primitiveArray[1] = r[2]; // ecx | |
| 322 primitiveArray[2] = r[3]; // edx | |
| 323 primitiveArray[3] = r[1]; // ebx | |
| 324 primitiveArray[4] = r[7]; // esp | |
| 325 primitiveArray[5] = r[6]; // ebp | |
| 326 primitiveArray[6] = r[5]; // esi | |
| 327 primitiveArray[7] = r[4]; // edi | |
| 328 (*env)->ReleaseLongArrayElements(env, registerArray, primitiveArray, 0); | |
| 329 #elif defined(__x86_64__) | |
| 330 /* From AMD64ThreadContext.java | |
| 331 public static final int R15 = 0; | |
| 332 public static final int R14 = 1; | |
| 333 public static final int R13 = 2; | |
| 334 public static final int R12 = 3; | |
| 335 public static final int R11 = 4; | |
| 336 public static final int R10 = 5; | |
| 337 public static final int R9 = 6; | |
| 338 public static final int R8 = 7; | |
| 339 public static final int RDI = 8; | |
| 340 public static final int RSI = 9; | |
| 341 public static final int RBP = 10; | |
| 342 public static final int RBX = 11; | |
| 343 public static final int RDX = 12; | |
| 344 public static final int RCX = 13; | |
| 345 public static final int RAX = 14; | |
| 346 public static final int TRAPNO = 15; | |
| 347 public static final int ERR = 16; | |
| 348 public static final int RIP = 17; | |
| 349 public static final int CS = 18; | |
| 350 public static final int RFL = 19; | |
| 351 public static final int RSP = 20; | |
| 352 public static final int SS = 21; | |
| 353 public static final int FS = 22; | |
| 354 public static final int GS = 23; | |
| 355 public static final int ES = 24; | |
| 356 public static final int DS = 25; | |
| 357 public static final int FSBASE = 26; | |
| 358 public static final int GSBASE = 27; | |
| 359 */ | |
| 360 // 64 bit | |
| 361 if (debug) printf("Getting threads for a 64-bit process\n"); | |
| 362 registerArray = (*env)->NewLongArray(env, 28); | |
| 363 primitiveArray = (*env)->GetLongArrayElements(env, registerArray, NULL); | |
| 364 | |
| 365 primitiveArray[0] = state.__r15; | |
| 366 primitiveArray[1] = state.__r14; | |
| 367 primitiveArray[2] = state.__r13; | |
| 368 primitiveArray[3] = state.__r12; | |
| 369 primitiveArray[4] = state.__r11; | |
| 370 primitiveArray[5] = state.__r10; | |
| 371 primitiveArray[6] = state.__r9; | |
| 372 primitiveArray[7] = state.__r8; | |
| 373 primitiveArray[8] = state.__rdi; | |
| 374 primitiveArray[9] = state.__rsi; | |
| 375 primitiveArray[10] = state.__rbp; | |
| 376 primitiveArray[11] = state.__rbx; | |
| 377 primitiveArray[12] = state.__rdx; | |
| 378 primitiveArray[13] = state.__rcx; | |
| 379 primitiveArray[14] = state.__rax; | |
| 380 primitiveArray[15] = 0; // trapno ? | |
| 381 primitiveArray[16] = 0; // err ? | |
| 382 primitiveArray[17] = state.__rip; | |
| 383 primitiveArray[18] = state.__cs; | |
| 384 primitiveArray[19] = state.__rflags; | |
| 385 primitiveArray[20] = state.__rsp; | |
| 386 primitiveArray[21] = 0; // We don't have SS | |
| 387 primitiveArray[22] = state.__fs; | |
| 388 primitiveArray[23] = state.__gs; | |
| 389 primitiveArray[24] = 0; | |
| 390 primitiveArray[25] = 0; | |
| 391 primitiveArray[26] = 0; | |
| 392 primitiveArray[27] = 0; | |
| 393 | |
| 394 if (debug) printf("set registers\n"); | |
| 395 | |
| 396 (*env)->ReleaseLongArrayElements(env, registerArray, primitiveArray, 0); | |
| 397 #else | |
| 398 #error Unsupported architecture | |
| 399 #endif | |
| 400 | |
| 401 return registerArray; | |
| 402 } | |
| 403 | |
| 404 /* | |
|
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405 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal |
| 4006 | 406 * Method: translateTID0 |
| 407 * Signature: (I)I | |
| 408 */ | |
| 409 JNIEXPORT jint JNICALL | |
|
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410 Java_sun_jvm_hotspot_debugger_macosx_MacOSXDebuggerLocal_translateTID0( |
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411 JNIEnv *env, jobject this_obj, jint tid) |
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412 { |
| 4006 | 413 if (debug) |
| 414 printf("translateTID0 called on tid = 0x%x\n", (int)tid); | |
| 415 | |
| 416 kern_return_t result; | |
| 417 thread_t foreign_tid, usable_tid; | |
| 418 mach_msg_type_name_t type; | |
|
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419 |
| 4006 | 420 foreign_tid = tid; |
| 421 | |
| 422 task_t gTask = getTask(env, this_obj); | |
| 423 result = mach_port_extract_right(gTask, foreign_tid, | |
| 424 MACH_MSG_TYPE_COPY_SEND, | |
| 425 &usable_tid, &type); | |
| 426 if (result != KERN_SUCCESS) | |
| 427 return -1; | |
| 428 | |
| 429 if (debug) | |
| 430 printf("translateTID0: 0x%x -> 0x%x\n", foreign_tid, usable_tid); | |
| 431 | |
| 432 return (jint) usable_tid; | |
| 433 } | |
| 434 | |
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435 |
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436 static bool ptrace_continue(pid_t pid, int signal) { |
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437 // pass the signal to the process so we don't swallow it |
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438 int res; |
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439 if ((res = ptrace(PT_CONTINUE, pid, (caddr_t)1, signal)) < 0) { |
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440 fprintf(stderr, "attach: ptrace(PT_CONTINUE, %d) failed with %d\n", pid, res); |
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441 return false; |
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442 } |
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443 return true; |
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444 } |
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445 |
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446 // waits until the ATTACH has stopped the process |
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447 // by signal SIGSTOP |
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448 static bool ptrace_waitpid(pid_t pid) { |
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449 int ret; |
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450 int status; |
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451 while (true) { |
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452 // Wait for debuggee to stop. |
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453 ret = waitpid(pid, &status, 0); |
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454 if (ret >= 0) { |
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455 if (WIFSTOPPED(status)) { |
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456 // Any signal will stop the thread, make sure it is SIGSTOP. Otherwise SIGSTOP |
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457 // will still be pending and delivered when the process is DETACHED and the process |
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458 // will go to sleep. |
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459 if (WSTOPSIG(status) == SIGSTOP) { |
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460 // Debuggee stopped by SIGSTOP. |
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461 return true; |
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462 } |
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463 if (!ptrace_continue(pid, WSTOPSIG(status))) { |
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464 fprintf(stderr, "attach: Failed to correctly attach to VM. VM might HANG! [PTRACE_CONT failed, stopped by %d]\n", WSTOPSIG(status)); |
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465 return false; |
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466 } |
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467 } else { |
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468 fprintf(stderr, "attach: waitpid(): Child process exited/terminated (status = 0x%x)\n", status); |
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469 return false; |
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470 } |
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471 } else { |
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472 switch (errno) { |
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473 case EINTR: |
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474 continue; |
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475 break; |
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476 case ECHILD: |
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477 fprintf(stderr, "attach: waitpid() failed. Child process pid (%d) does not exist \n", pid); |
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478 break; |
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479 case EINVAL: |
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480 fprintf(stderr, "attach: waitpid() failed. Invalid options argument.\n"); |
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481 break; |
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482 default: |
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483 fprintf(stderr, "attach: waitpid() failed. Unexpected error %d\n",errno); |
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484 break; |
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485 } |
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486 return false; |
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487 } |
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488 } |
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489 } |
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490 |
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491 // attach to a process/thread specified by "pid" |
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492 static bool ptrace_attach(pid_t pid) { |
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493 int res; |
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494 if ((res = ptrace(PT_ATTACH, pid, 0, 0)) < 0) { |
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495 fprintf(stderr, "ptrace(PT_ATTACH, %d) failed with %d\n", pid, res); |
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496 return false; |
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497 } else { |
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498 return ptrace_waitpid(pid); |
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499 } |
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500 } |
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501 |
| 4006 | 502 /* |
| 503 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal | |
| 504 * Method: attach0 | |
| 505 * Signature: (I)V | |
| 506 */ | |
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507 JNIEXPORT void JNICALL |
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508 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__I( |
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509 JNIEnv *env, jobject this_obj, jint jpid) |
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510 { |
| 4006 | 511 JNF_COCOA_ENTER(env); |
| 512 if (getenv("JAVA_SAPROC_DEBUG") != NULL) | |
| 513 debug = JNI_TRUE; | |
| 514 else | |
| 515 debug = JNI_FALSE; | |
| 516 if (debug) printf("attach0 called for jpid=%d\n", (int)jpid); | |
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517 |
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518 // get the task from the pid |
| 4006 | 519 kern_return_t result; |
| 520 task_t gTask = 0; | |
| 521 result = task_for_pid(mach_task_self(), jpid, &gTask); | |
| 522 if (result != KERN_SUCCESS) { | |
| 523 fprintf(stderr, "attach: task_for_pid(%d) failed (%d)\n", (int)jpid, result); | |
| 524 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the process"); | |
| 525 } | |
| 526 putTask(env, this_obj, gTask); | |
| 527 | |
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528 // use ptrace to stop the process |
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529 // on os x, ptrace only needs to be called on the process, not the individual threads |
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530 if (ptrace_attach(jpid) != true) { |
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531 mach_port_deallocate(mach_task_self(), gTask); |
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532 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the process"); |
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533 } |
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534 |
| 4006 | 535 id symbolicator = nil; |
| 536 id jrsSymbolicator = objc_lookUpClass("JRSSymbolicator"); | |
| 537 if (jrsSymbolicator != nil) { | |
| 538 id (*dynamicCall)(id, SEL, pid_t) = (id (*)(id, SEL, pid_t))&objc_msgSend; | |
| 539 symbolicator = dynamicCall(jrsSymbolicator, @selector(symbolicatorForPid:), (pid_t)jpid); | |
| 540 } | |
| 541 if (symbolicator != nil) { | |
| 542 CFRetain(symbolicator); // pin symbolicator while in java heap | |
| 543 } | |
| 544 | |
| 545 putSymbolicator(env, this_obj, symbolicator); | |
| 546 if (symbolicator == nil) { | |
| 547 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach symbolicator to the process"); | |
| 548 } | |
| 549 | |
| 550 JNF_COCOA_EXIT(env); | |
| 551 } | |
| 552 | |
| 553 /* | |
| 554 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal | |
| 555 * Method: detach0 | |
| 556 * Signature: ()V | |
| 557 */ | |
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558 JNIEXPORT void JNICALL |
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559 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_detach0( |
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560 JNIEnv *env, jobject this_obj) |
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561 { |
| 4006 | 562 JNF_COCOA_ENTER(env); |
| 563 if (debug) printf("detach0 called\n"); | |
| 564 | |
| 565 task_t gTask = getTask(env, this_obj); | |
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566 |
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567 // detach from the ptraced process causing it to resume execution |
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568 int pid; |
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569 kern_return_t k_res; |
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570 k_res = pid_for_task(gTask, &pid); |
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571 if (k_res != KERN_SUCCESS) { |
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572 fprintf(stderr, "detach: pid_for_task(%d) failed (%d)\n", pid, k_res); |
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573 } |
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574 else { |
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575 int res = ptrace(PT_DETACH, pid, 0, 0); |
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576 if (res < 0) { |
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577 fprintf(stderr, "detach: ptrace(PT_DETACH, %d) failed (%d)\n", pid, res); |
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578 } |
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579 } |
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580 |
| 4006 | 581 mach_port_deallocate(mach_task_self(), gTask); |
| 582 id symbolicator = getSymbolicator(env, this_obj); | |
| 583 if (symbolicator != nil) { | |
| 584 CFRelease(symbolicator); | |
| 585 } | |
| 586 JNF_COCOA_EXIT(env); | |
| 587 } | |
| 6782 | 588 |
| 589 /* | |
| 590 * Class: sun_jvm_hotspot_asm_Disassembler | |
| 591 * Method: load_library | |
| 592 * Signature: (Ljava/lang/String;)L | |
| 593 */ | |
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594 JNIEXPORT jlong JNICALL |
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595 Java_sun_jvm_hotspot_asm_Disassembler_load_1library( |
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596 JNIEnv * env, |
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597 jclass disclass, |
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598 jstring jrepath_s, |
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599 jstring libname_s) |
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600 { |
| 6782 | 601 uintptr_t func = 0; |
| 602 const char* error_message = NULL; | |
| 603 const char* java_home; | |
| 604 jboolean isCopy; | |
| 605 uintptr_t *handle = NULL; | |
| 606 | |
| 607 const char * jrepath = (*env)->GetStringUTFChars(env, jrepath_s, &isCopy); // like $JAVA_HOME/jre/lib/sparc/ | |
| 608 const char * libname = (*env)->GetStringUTFChars(env, libname_s, &isCopy); | |
| 609 char buffer[128]; | |
| 610 | |
| 611 /* Load the hsdis library */ | |
| 612 void* hsdis_handle; | |
| 613 hsdis_handle = dlopen(libname, RTLD_LAZY | RTLD_GLOBAL); | |
| 614 if (hsdis_handle == NULL) { | |
| 615 snprintf(buffer, sizeof(buffer), "%s%s", jrepath, libname); | |
| 616 hsdis_handle = dlopen(buffer, RTLD_LAZY | RTLD_GLOBAL); | |
| 617 } | |
| 618 if (hsdis_handle != NULL) { | |
| 619 func = (uintptr_t)dlsym(hsdis_handle, "decode_instructions_virtual"); | |
| 620 } | |
| 621 if (func == 0) { | |
| 622 error_message = dlerror(); | |
| 623 fprintf(stderr, "%s\n", error_message); | |
| 624 } | |
| 625 | |
| 626 (*env)->ReleaseStringUTFChars(env, libname_s, libname); | |
| 627 (*env)->ReleaseStringUTFChars(env, jrepath_s, jrepath); | |
| 628 | |
| 629 if (func == 0) { | |
| 630 /* Couldn't find entry point. error_message should contain some | |
| 631 * platform dependent error message. | |
| 632 */ | |
| 633 THROW_NEW_DEBUGGER_EXCEPTION(error_message); | |
| 634 } | |
| 635 return (jlong)func; | |
| 636 } | |
| 637 | |
| 638 /* signature of decode_instructions_virtual from hsdis.h */ | |
| 639 typedef void* (*decode_func)(uintptr_t start_va, uintptr_t end_va, | |
| 640 unsigned char* start, uintptr_t length, | |
| 641 void* (*event_callback)(void*, const char*, void*), | |
| 642 void* event_stream, | |
| 643 int (*printf_callback)(void*, const char*, ...), | |
| 644 void* printf_stream, | |
| 645 const char* options); | |
| 646 | |
| 647 /* container for call back state when decoding instructions */ | |
| 648 typedef struct { | |
| 649 JNIEnv* env; | |
| 650 jobject dis; | |
| 651 jobject visitor; | |
| 652 jmethodID handle_event; | |
| 653 jmethodID raw_print; | |
| 654 char buffer[4096]; | |
| 655 } decode_env; | |
| 656 | |
| 657 | |
| 658 /* event callback binding to Disassembler.handleEvent */ | |
| 659 static void* event_to_env(void* env_pv, const char* event, void* arg) { | |
| 660 decode_env* denv = (decode_env*)env_pv; | |
| 661 JNIEnv* env = denv->env; | |
| 662 jstring event_string = (*env)->NewStringUTF(env, event); | |
| 663 jlong result = (*env)->CallLongMethod(env, denv->dis, denv->handle_event, denv->visitor, | |
| 664 event_string, (jlong) (uintptr_t)arg); | |
| 665 /* ignore exceptions for now */ | |
| 666 CHECK_EXCEPTION_CLEAR_((void *)0); | |
| 667 return (void*)(uintptr_t)result; | |
| 668 } | |
| 669 | |
| 670 /* printing callback binding to Disassembler.rawPrint */ | |
| 671 static int printf_to_env(void* env_pv, const char* format, ...) { | |
| 672 jstring output; | |
| 673 va_list ap; | |
| 674 int cnt; | |
| 675 decode_env* denv = (decode_env*)env_pv; | |
| 676 JNIEnv* env = denv->env; | |
| 677 size_t flen = strlen(format); | |
| 678 const char* raw = NULL; | |
| 679 | |
| 680 if (flen == 0) return 0; | |
| 681 if (flen < 2 || | |
| 682 strchr(format, '%') == NULL) { | |
| 683 raw = format; | |
| 684 } else if (format[0] == '%' && format[1] == '%' && | |
| 685 strchr(format+2, '%') == NULL) { | |
| 686 // happens a lot on machines with names like %foo | |
| 687 flen--; | |
| 688 raw = format+1; | |
| 689 } | |
| 690 if (raw != NULL) { | |
| 691 jstring output = (*env)->NewStringUTF(env, raw); | |
| 692 (*env)->CallVoidMethod(env, denv->dis, denv->raw_print, denv->visitor, output); | |
| 693 CHECK_EXCEPTION_CLEAR; | |
| 694 return (int) flen; | |
| 695 } | |
| 696 va_start(ap, format); | |
| 697 cnt = vsnprintf(denv->buffer, sizeof(denv->buffer), format, ap); | |
| 698 va_end(ap); | |
| 699 | |
| 700 output = (*env)->NewStringUTF(env, denv->buffer); | |
| 701 (*env)->CallVoidMethod(env, denv->dis, denv->raw_print, denv->visitor, output); | |
| 702 CHECK_EXCEPTION_CLEAR; | |
| 703 return cnt; | |
| 704 } | |
| 705 | |
| 706 /* | |
| 707 * Class: sun_jvm_hotspot_asm_Disassembler | |
| 708 * Method: decode | |
| 709 * Signature: (Lsun/jvm/hotspot/asm/InstructionVisitor;J[BLjava/lang/String;J)V | |
| 710 */ | |
|
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711 JNIEXPORT void JNICALL |
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712 Java_sun_jvm_hotspot_asm_Disassembler_decode( |
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713 JNIEnv * env, |
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714 jobject dis, |
|
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|
715 jobject visitor, |
|
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716 jlong startPc, |
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717 jbyteArray code, |
|
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718 jstring options_s, |
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719 jlong decode_instructions_virtual) |
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720 { |
| 6782 | 721 jboolean isCopy; |
| 722 jbyte* start = (*env)->GetByteArrayElements(env, code, &isCopy); | |
| 723 jbyte* end = start + (*env)->GetArrayLength(env, code); | |
| 724 const char * options = (*env)->GetStringUTFChars(env, options_s, &isCopy); | |
| 725 jclass disclass = (*env)->GetObjectClass(env, dis); | |
| 726 | |
| 727 decode_env denv; | |
| 728 denv.env = env; | |
| 729 denv.dis = dis; | |
| 730 denv.visitor = visitor; | |
| 731 | |
| 732 /* find Disassembler.handleEvent callback */ | |
| 733 denv.handle_event = (*env)->GetMethodID(env, disclass, "handleEvent", | |
| 734 "(Lsun/jvm/hotspot/asm/InstructionVisitor;Ljava/lang/String;J)J"); | |
| 735 CHECK_EXCEPTION_CLEAR_VOID | |
| 736 | |
| 737 /* find Disassembler.rawPrint callback */ | |
| 738 denv.raw_print = (*env)->GetMethodID(env, disclass, "rawPrint", | |
| 739 "(Lsun/jvm/hotspot/asm/InstructionVisitor;Ljava/lang/String;)V"); | |
| 740 CHECK_EXCEPTION_CLEAR_VOID | |
| 741 | |
| 742 /* decode the buffer */ | |
| 743 (*(decode_func)(uintptr_t)decode_instructions_virtual)(startPc, | |
| 744 startPc + end - start, | |
| 745 (unsigned char*)start, | |
| 746 end - start, | |
| 747 &event_to_env, (void*) &denv, | |
| 748 &printf_to_env, (void*) &denv, | |
| 749 options); | |
| 750 | |
| 751 /* cleanup */ | |
| 752 (*env)->ReleaseByteArrayElements(env, code, start, JNI_ABORT); | |
| 753 (*env)->ReleaseStringUTFChars(env, options_s, options); | |
| 754 } |