1/* 2 * Copyright (c) 2002, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include <objc/objc-runtime.h> 26#import <Foundation/Foundation.h> 27#import <JavaNativeFoundation/JavaNativeFoundation.h> 28#import <JavaRuntimeSupport/JavaRuntimeSupport.h> 29 30#include <jni.h> 31 32#import <mach/mach.h> 33#import <mach/mach_types.h> 34#import <sys/sysctl.h> 35#import <stdio.h> 36#import <stdarg.h> 37#import <stdlib.h> 38#import <strings.h> 39#import <dlfcn.h> 40#import <limits.h> 41#import <errno.h> 42#import <sys/types.h> 43#import <sys/ptrace.h> 44#include "libproc_impl.h" 45 46#define UNSUPPORTED_ARCH "Unsupported architecture!" 47 48#if defined(x86_64) && !defined(amd64) 49#define amd64 1 50#endif 51 52#if amd64 53#include "sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext.h" 54#else 55#error UNSUPPORTED_ARCH 56#endif 57 58static jfieldID symbolicatorID = 0; // set in _init0 59static jfieldID taskID = 0; // set in _init0 60 61static jfieldID p_ps_prochandle_ID = 0; 62static jfieldID loadObjectList_ID = 0; 63static jmethodID listAdd_ID = 0; 64 65static jmethodID createClosestSymbol_ID = 0; 66static jmethodID createLoadObject_ID = 0; 67static jmethodID getJavaThreadsInfo_ID = 0; 68 69// indicator if thread id (lwpid_t) was set 70static bool _threads_filled = false; 71 72static void putSymbolicator(JNIEnv *env, jobject this_obj, id symbolicator) { 73 (*env)->SetLongField(env, this_obj, symbolicatorID, (jlong)(intptr_t)symbolicator); 74} 75 76static id getSymbolicator(JNIEnv *env, jobject this_obj) { 77 jlong ptr = (*env)->GetLongField(env, this_obj, symbolicatorID); 78 return (id)(intptr_t)ptr; 79} 80 81static void putTask(JNIEnv *env, jobject this_obj, task_t task) { 82 (*env)->SetLongField(env, this_obj, taskID, (jlong)task); 83} 84 85static task_t getTask(JNIEnv *env, jobject this_obj) { 86 jlong ptr = (*env)->GetLongField(env, this_obj, taskID); 87 return (task_t)ptr; 88} 89 90#define CHECK_EXCEPTION_(value) if ((*env)->ExceptionOccurred(env)) { return value; } 91#define CHECK_EXCEPTION if ((*env)->ExceptionOccurred(env)) { return;} 92#define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throw_new_debugger_exception(env, str); return value; } 93#define THROW_NEW_DEBUGGER_EXCEPTION(str) { throw_new_debugger_exception(env, str); return;} 94#define CHECK_EXCEPTION_CLEAR if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); } 95#define CHECK_EXCEPTION_CLEAR_VOID if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); return; } 96#define CHECK_EXCEPTION_CLEAR_(value) if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); return value; } 97 98static void throw_new_debugger_exception(JNIEnv* env, const char* errMsg) { 99 jclass exceptionClass = (*env)->FindClass(env, "sun/jvm/hotspot/debugger/DebuggerException"); 100 CHECK_EXCEPTION; 101 (*env)->ThrowNew(env, exceptionClass, errMsg); 102} 103 104static struct ps_prochandle* get_proc_handle(JNIEnv* env, jobject this_obj) { 105 jlong ptr = (*env)->GetLongField(env, this_obj, p_ps_prochandle_ID); 106 return (struct ps_prochandle*)(intptr_t)ptr; 107} 108 109#if defined(__i386__) 110 #define hsdb_thread_state_t x86_thread_state32_t 111 #define hsdb_float_state_t x86_float_state32_t 112 #define HSDB_THREAD_STATE x86_THREAD_STATE32 113 #define HSDB_FLOAT_STATE x86_FLOAT_STATE32 114 #define HSDB_THREAD_STATE_COUNT x86_THREAD_STATE32_COUNT 115 #define HSDB_FLOAT_STATE_COUNT x86_FLOAT_STATE32_COUNT 116#elif defined(__x86_64__) 117 #define hsdb_thread_state_t x86_thread_state64_t 118 #define hsdb_float_state_t x86_float_state64_t 119 #define HSDB_THREAD_STATE x86_THREAD_STATE64 120 #define HSDB_FLOAT_STATE x86_FLOAT_STATE64 121 #define HSDB_THREAD_STATE_COUNT x86_THREAD_STATE64_COUNT 122 #define HSDB_FLOAT_STATE_COUNT x86_FLOAT_STATE64_COUNT 123#else 124 #error UNSUPPORTED_ARCH 125#endif 126 127/* 128 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal 129 * Method: init0 130 * Signature: ()V 131 */ 132JNIEXPORT void JNICALL 133Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_init0(JNIEnv *env, jclass cls) { 134 symbolicatorID = (*env)->GetFieldID(env, cls, "symbolicator", "J"); 135 CHECK_EXCEPTION; 136 taskID = (*env)->GetFieldID(env, cls, "task", "J"); 137 CHECK_EXCEPTION; 138 139 // for core file 140 p_ps_prochandle_ID = (*env)->GetFieldID(env, cls, "p_ps_prochandle", "J"); 141 CHECK_EXCEPTION; 142 loadObjectList_ID = (*env)->GetFieldID(env, cls, "loadObjectList", "Ljava/util/List;"); 143 CHECK_EXCEPTION; 144 145 // methods we use 146 createClosestSymbol_ID = (*env)->GetMethodID(env, cls, "createClosestSymbol", 147 "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;"); 148 CHECK_EXCEPTION; 149 createLoadObject_ID = (*env)->GetMethodID(env, cls, "createLoadObject", 150 "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;"); 151 CHECK_EXCEPTION; 152 153 // java.util.List method we call 154 jclass listClass = (*env)->FindClass(env, "java/util/List"); 155 CHECK_EXCEPTION; 156 listAdd_ID = (*env)->GetMethodID(env, listClass, "add", "(Ljava/lang/Object;)Z"); 157 CHECK_EXCEPTION; 158 getJavaThreadsInfo_ID = (*env)->GetMethodID(env, cls, "getJavaThreadsInfo", 159 "()[J"); 160 CHECK_EXCEPTION; 161 162 init_libproc(getenv("LIBSAPROC_DEBUG") != NULL); 163} 164 165JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getAddressSize 166 (JNIEnv *env, jclass cls) 167{ 168#ifdef _LP64 169 return 8; 170#else 171 #error UNSUPPORTED_ARCH 172#endif 173} 174 175/** called by Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByName0 */ 176jlong lookupByNameIncore( 177 JNIEnv *env, struct ps_prochandle *ph, jobject this_obj, jstring objectName, jstring symbolName) 178{ 179 const char *objectName_cstr, *symbolName_cstr; 180 jlong addr; 181 jboolean isCopy; 182 objectName_cstr = NULL; 183 if (objectName != NULL) { 184 objectName_cstr = (*env)->GetStringUTFChars(env, objectName, &isCopy); 185 CHECK_EXCEPTION_(0); 186 } 187 symbolName_cstr = (*env)->GetStringUTFChars(env, symbolName, &isCopy); 188 CHECK_EXCEPTION_(0); 189 190 print_debug("look for %s \n", symbolName_cstr); 191 addr = (jlong) lookup_symbol(ph, objectName_cstr, symbolName_cstr); 192 193 if (objectName_cstr != NULL) { 194 (*env)->ReleaseStringUTFChars(env, objectName, objectName_cstr); 195 } 196 (*env)->ReleaseStringUTFChars(env, symbolName, symbolName_cstr); 197 return addr; 198} 199 200/* 201 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal 202 * Method: lookupByName0 203 * Signature: (Ljava/lang/String;Ljava/lang/String;)J 204 */ 205JNIEXPORT jlong JNICALL 206Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByName0( 207 JNIEnv *env, jobject this_obj, 208 jstring objectName, jstring symbolName) 209{ 210 struct ps_prochandle* ph = get_proc_handle(env, this_obj); 211 if (ph != NULL && ph->core != NULL) { 212 return lookupByNameIncore(env, ph, this_obj, objectName, symbolName); 213 } 214 215 jlong address = 0; 216 217JNF_COCOA_ENTER(env); 218 NSString *symbolNameString = JNFJavaToNSString(env, symbolName); 219 220 print_debug("lookupInProcess called for %s\n", [symbolNameString UTF8String]); 221 222 id symbolicator = getSymbolicator(env, this_obj); 223 if (symbolicator != nil) { 224 uint64_t (*dynamicCall)(id, SEL, NSString *) = (uint64_t (*)(id, SEL, NSString *))&objc_msgSend; 225 address = (jlong) dynamicCall(symbolicator, @selector(addressForSymbol:), symbolNameString); 226 } 227 228 print_debug("address of symbol %s = %llx\n", [symbolNameString UTF8String], address); 229JNF_COCOA_EXIT(env); 230 231 return address; 232} 233 234/* 235 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal 236 * Method: lookupByAddress0 237 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol; 238 */ 239JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByAddress0 240 (JNIEnv *env, jobject this_obj, jlong addr) { 241 uintptr_t offset; 242 const char* sym = NULL; 243 jstring sym_string; 244 245 struct ps_prochandle* ph = get_proc_handle(env, this_obj); 246 if (ph != NULL && ph->core != NULL) { 247 sym = symbol_for_pc(ph, (uintptr_t) addr, &offset); 248 if (sym == NULL) return 0; 249 sym_string = (*env)->NewStringUTF(env, sym); 250 CHECK_EXCEPTION_(0); 251 return (*env)->CallObjectMethod(env, this_obj, createClosestSymbol_ID, 252 sym_string, (jlong)offset); 253 } 254 return 0; 255} 256 257/** called from Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_readBytesFromProcess0 */ 258jbyteArray readBytesFromCore( 259 JNIEnv *env, struct ps_prochandle *ph, jobject this_obj, jlong addr, jlong numBytes) 260{ 261 jboolean isCopy; 262 jbyteArray array; 263 jbyte *bufPtr; 264 ps_err_e err; 265 266 array = (*env)->NewByteArray(env, numBytes); 267 CHECK_EXCEPTION_(0); 268 bufPtr = (*env)->GetByteArrayElements(env, array, &isCopy); 269 CHECK_EXCEPTION_(0); 270 271 err = ps_pread(ph, (psaddr_t) (uintptr_t)addr, bufPtr, numBytes); 272 (*env)->ReleaseByteArrayElements(env, array, bufPtr, 0); 273 return (err == PS_OK)? array : 0; 274} 275 276/* 277 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal 278 * Method: readBytesFromProcess0 279 * Signature: (JJ)Lsun/jvm/hotspot/debugger/ReadResult; 280 */ 281JNIEXPORT jbyteArray JNICALL 282Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_readBytesFromProcess0( 283 JNIEnv *env, jobject this_obj, 284 jlong addr, jlong numBytes) 285{ 286 print_debug("readBytesFromProcess called. addr = %llx numBytes = %lld\n", addr, numBytes); 287 288 // must allocate storage instead of using former parameter buf 289 jbyteArray array; 290 291 struct ps_prochandle* ph = get_proc_handle(env, this_obj); 292 if (ph != NULL && ph->core != NULL) { 293 return readBytesFromCore(env, ph, this_obj, addr, numBytes); 294 } 295 296 array = (*env)->NewByteArray(env, numBytes); 297 CHECK_EXCEPTION_(0); 298 299 unsigned long alignedAddress; 300 unsigned long alignedLength = 0; 301 kern_return_t result; 302 vm_offset_t *pages; 303 int *mapped; 304 long pageCount; 305 uint byteCount; 306 int i; 307 unsigned long remaining; 308 309 alignedAddress = trunc_page(addr); 310 if (addr != alignedAddress) { 311 alignedLength += addr - alignedAddress; 312 } 313 alignedLength = round_page(numBytes); 314 pageCount = alignedLength/vm_page_size; 315 316 // Allocate storage for pages and flags. 317 pages = malloc(pageCount * sizeof(vm_offset_t)); 318 mapped = calloc(pageCount, sizeof(int)); 319 320 task_t gTask = getTask(env, this_obj); 321 // Try to read each of the pages. 322 for (i = 0; i < pageCount; i++) { 323 result = vm_read(gTask, alignedAddress + i*vm_page_size, vm_page_size, 324 &pages[i], &byteCount); 325 mapped[i] = (result == KERN_SUCCESS); 326 // assume all failures are unmapped pages 327 } 328 329 print_debug("%ld pages\n", pageCount); 330 331 remaining = numBytes; 332 333 for (i = 0; i < pageCount; i++) { 334 unsigned long len = vm_page_size; 335 unsigned long start = 0; 336 337 if (i == 0) { 338 start = addr - alignedAddress; 339 len = vm_page_size - start; 340 } 341 342 if (i == (pageCount - 1)) { 343 len = remaining; 344 } 345 346 if (mapped[i]) { 347 print_debug("page %d mapped (len %ld start %ld)\n", i, len, start); 348 (*env)->SetByteArrayRegion(env, array, 0, len, ((jbyte *) pages[i] + start)); 349 vm_deallocate(mach_task_self(), pages[i], vm_page_size); 350 } 351 352 remaining -= len; 353 } 354 355 free (pages); 356 free (mapped); 357 return array; 358} 359 360/** Only used for core file reading, set thread_id for threads which is got after core file parsed. 361 * Thread context is available in Mach-O core file but thread id is not. We can get thread id 362 * from Threads which store all java threads information when they are created. Here we can identify 363 * them as java threads by checking if a thread's rsp or rbp within a java thread's stack. 364 * Note Macosx uses unique_thread_id which is different from other platforms though printed ids 365 * are still pthread id. Function BsdDebuggerLocal.getJavaThreadsInfo returns an array of long 366 * integers to host all java threads' id, stack_start, stack_end as: 367 * [uid0, stack_start0, stack_end0, uid1, stack_start1, stack_end1, ...] 368 * 369 * The work cannot be done at init0 since Threads is not available yet(VM not initialized yet). 370 * This function should be called only once if succeeded 371 */ 372bool fill_java_threads(JNIEnv* env, jobject this_obj, struct ps_prochandle* ph) { 373 int n = 0, i = 0, j; 374 struct reg regs; 375 376 jlongArray thrinfos = (*env)->CallObjectMethod(env, this_obj, getJavaThreadsInfo_ID); 377 CHECK_EXCEPTION_(false); 378 int len = (int)(*env)->GetArrayLength(env, thrinfos); 379 uint64_t* cinfos = (uint64_t *)(*env)->GetLongArrayElements(env, thrinfos, NULL); 380 CHECK_EXCEPTION_(false); 381 n = get_num_threads(ph); 382 print_debug("fill_java_threads called, num_of_thread = %d\n", n); 383 for (i = 0; i < n; i++) { 384 if (!get_nth_lwp_regs(ph, i, ®s)) { 385 print_debug("Could not get regs of thread %d, already set!\n", i); 386 return false; 387 } 388 for (j = 0; j < len; j += 3) { 389 lwpid_t uid = cinfos[j]; 390 uint64_t beg = cinfos[j + 1]; 391 uint64_t end = cinfos[j + 2]; 392 if ((regs.r_rsp < end && regs.r_rsp >= beg) || 393 (regs.r_rbp < end && regs.r_rbp >= beg)) { 394 set_lwp_id(ph, i, uid); 395 break; 396 } 397 } 398 } 399 (*env)->ReleaseLongArrayElements(env, thrinfos, (jlong*)cinfos, 0); 400 CHECK_EXCEPTION_(false); 401 return true; 402} 403 404/* For core file only, called from 405 * Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getThreadIntegerRegisterSet0 406 */ 407jlongArray getThreadIntegerRegisterSetFromCore(JNIEnv *env, jobject this_obj, long lwp_id, struct ps_prochandle* ph) { 408 if (!_threads_filled) { 409 if (!fill_java_threads(env, this_obj, ph)) { 410 throw_new_debugger_exception(env, "Failed to fill in threads"); 411 return 0; 412 } else { 413 _threads_filled = true; 414 } 415 } 416 417 struct reg gregs; 418 jboolean isCopy; 419 jlongArray array; 420 jlong *regs; 421 422 if (get_lwp_regs(ph, lwp_id, &gregs) != true) { 423 THROW_NEW_DEBUGGER_EXCEPTION_("get_thread_regs failed for a lwp", 0); 424 } 425 426#undef NPRGREG 427#undef REG_INDEX 428#if amd64 429#define NPRGREG sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_NPRGREG 430#define REG_INDEX(reg) sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_##reg 431 432 array = (*env)->NewLongArray(env, NPRGREG); 433 CHECK_EXCEPTION_(0); 434 regs = (*env)->GetLongArrayElements(env, array, &isCopy); 435 436 regs[REG_INDEX(R15)] = gregs.r_r15; 437 regs[REG_INDEX(R14)] = gregs.r_r14; 438 regs[REG_INDEX(R13)] = gregs.r_r13; 439 regs[REG_INDEX(R12)] = gregs.r_r12; 440 regs[REG_INDEX(RBP)] = gregs.r_rbp; 441 regs[REG_INDEX(RBX)] = gregs.r_rbx; 442 regs[REG_INDEX(R11)] = gregs.r_r11; 443 regs[REG_INDEX(R10)] = gregs.r_r10; 444 regs[REG_INDEX(R9)] = gregs.r_r9; 445 regs[REG_INDEX(R8)] = gregs.r_r8; 446 regs[REG_INDEX(RAX)] = gregs.r_rax; 447 regs[REG_INDEX(RCX)] = gregs.r_rcx; 448 regs[REG_INDEX(RDX)] = gregs.r_rdx; 449 regs[REG_INDEX(RSI)] = gregs.r_rsi; 450 regs[REG_INDEX(RDI)] = gregs.r_rdi; 451 regs[REG_INDEX(RIP)] = gregs.r_rip; 452 regs[REG_INDEX(CS)] = gregs.r_cs; 453 regs[REG_INDEX(RSP)] = gregs.r_rsp; 454 regs[REG_INDEX(SS)] = gregs.r_ss; 455 regs[REG_INDEX(FSBASE)] = 0; 456 regs[REG_INDEX(GSBASE)] = 0; 457 regs[REG_INDEX(DS)] = gregs.r_ds; 458 regs[REG_INDEX(ES)] = gregs.r_es; 459 regs[REG_INDEX(FS)] = gregs.r_fs; 460 regs[REG_INDEX(GS)] = gregs.r_gs; 461 regs[REG_INDEX(TRAPNO)] = gregs.r_trapno; 462 regs[REG_INDEX(RFL)] = gregs.r_rflags; 463 464#endif /* amd64 */ 465 (*env)->ReleaseLongArrayElements(env, array, regs, JNI_COMMIT); 466 return array; 467} 468 469/* 470 * Lookup the thread_t that corresponds to the given thread_id. 471 * The thread_id should be the result from calling thread_info() with THREAD_IDENTIFIER_INFO 472 * and reading the m_ident_info.thread_id returned. 473 * The returned thread_t is the mach send right to the kernel port for the corresponding thread. 474 * 475 * We cannot simply use the OSThread._thread_id field in the JVM. This is set to ::mach_thread_self() 476 * in the VM, but that thread port is not valid for a remote debugger to access the thread. 477 */ 478thread_t 479lookupThreadFromThreadId(task_t task, jlong thread_id) { 480 print_debug("lookupThreadFromThreadId thread_id=0x%llx\n", thread_id); 481 482 thread_array_t thread_list = NULL; 483 mach_msg_type_number_t thread_list_count = 0; 484 thread_t result_thread = 0; 485 int i; 486 487 // get the list of all the send rights 488 kern_return_t result = task_threads(task, &thread_list, &thread_list_count); 489 if (result != KERN_SUCCESS) { 490 print_debug("task_threads returned 0x%x\n", result); 491 return 0; 492 } 493 494 for(i = 0 ; i < thread_list_count; i++) { 495 thread_identifier_info_data_t m_ident_info; 496 mach_msg_type_number_t count = THREAD_IDENTIFIER_INFO_COUNT; 497 498 // get the THREAD_IDENTIFIER_INFO for the send right 499 result = thread_info(thread_list[i], THREAD_IDENTIFIER_INFO, (thread_info_t) &m_ident_info, &count); 500 if (result != KERN_SUCCESS) { 501 print_debug("thread_info returned 0x%x\n", result); 502 break; 503 } 504 505 // if this is the one we're looking for, return the send right 506 if (thread_id == m_ident_info.thread_id) 507 { 508 result_thread = thread_list[i]; 509 break; 510 } 511 } 512 513 vm_size_t thread_list_size = (vm_size_t) (thread_list_count * sizeof (thread_t)); 514 vm_deallocate(mach_task_self(), (vm_address_t) thread_list, thread_list_count); 515 516 return result_thread; 517} 518 519 520/* 521 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal 522 * Method: getThreadIntegerRegisterSet0 523 * Signature: (J)[J 524 */ 525JNIEXPORT jlongArray JNICALL 526Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getThreadIntegerRegisterSet0( 527 JNIEnv *env, jobject this_obj, 528 jlong thread_id) 529{ 530 print_debug("getThreadRegisterSet0 called\n"); 531 532 struct ps_prochandle* ph = get_proc_handle(env, this_obj); 533 if (ph != NULL && ph->core != NULL) { 534 return getThreadIntegerRegisterSetFromCore(env, this_obj, thread_id, ph); 535 } 536 537 kern_return_t result; 538 thread_t tid; 539 mach_msg_type_number_t count = HSDB_THREAD_STATE_COUNT; 540 hsdb_thread_state_t state; 541 jlongArray registerArray; 542 jlong *primitiveArray; 543 task_t gTask = getTask(env, this_obj); 544 545 tid = lookupThreadFromThreadId(gTask, thread_id); 546 547 result = thread_get_state(tid, HSDB_THREAD_STATE, (thread_state_t)&state, &count); 548 549 if (result != KERN_SUCCESS) { 550 print_error("getregs: thread_get_state(%d) failed (%d)\n", tid, result); 551 return NULL; 552 } 553 554#if amd64 555#define NPRGREG sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_NPRGREG 556#undef REG_INDEX 557#define REG_INDEX(reg) sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_##reg 558 559 // 64 bit 560 print_debug("Getting threads for a 64-bit process\n"); 561 registerArray = (*env)->NewLongArray(env, NPRGREG); 562 CHECK_EXCEPTION_(0); 563 primitiveArray = (*env)->GetLongArrayElements(env, registerArray, NULL); 564 565 primitiveArray[REG_INDEX(R15)] = state.__r15; 566 primitiveArray[REG_INDEX(R14)] = state.__r14; 567 primitiveArray[REG_INDEX(R13)] = state.__r13; 568 primitiveArray[REG_INDEX(R12)] = state.__r12; 569 primitiveArray[REG_INDEX(R11)] = state.__r11; 570 primitiveArray[REG_INDEX(R10)] = state.__r10; 571 primitiveArray[REG_INDEX(R9)] = state.__r9; 572 primitiveArray[REG_INDEX(R8)] = state.__r8; 573 primitiveArray[REG_INDEX(RDI)] = state.__rdi; 574 primitiveArray[REG_INDEX(RSI)] = state.__rsi; 575 primitiveArray[REG_INDEX(RBP)] = state.__rbp; 576 primitiveArray[REG_INDEX(RBX)] = state.__rbx; 577 primitiveArray[REG_INDEX(RDX)] = state.__rdx; 578 primitiveArray[REG_INDEX(RCX)] = state.__rcx; 579 primitiveArray[REG_INDEX(RAX)] = state.__rax; 580 primitiveArray[REG_INDEX(TRAPNO)] = 0; // trapno, not used 581 primitiveArray[REG_INDEX(ERR)] = 0; // err, not used 582 primitiveArray[REG_INDEX(RIP)] = state.__rip; 583 primitiveArray[REG_INDEX(CS)] = state.__cs; 584 primitiveArray[REG_INDEX(RFL)] = state.__rflags; 585 primitiveArray[REG_INDEX(RSP)] = state.__rsp; 586 primitiveArray[REG_INDEX(SS)] = 0; // We don't have SS 587 primitiveArray[REG_INDEX(FS)] = state.__fs; 588 primitiveArray[REG_INDEX(GS)] = state.__gs; 589 primitiveArray[REG_INDEX(ES)] = 0; 590 primitiveArray[REG_INDEX(DS)] = 0; 591 primitiveArray[REG_INDEX(FSBASE)] = 0; 592 primitiveArray[REG_INDEX(GSBASE)] = 0; 593 print_debug("set registers\n"); 594 595 (*env)->ReleaseLongArrayElements(env, registerArray, primitiveArray, 0); 596 597#else 598#error UNSUPPORTED_ARCH 599#endif /* amd64 */ 600 601 return registerArray; 602} 603 604/* 605 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal 606 * Method: translateTID0 607 * Signature: (I)I 608 */ 609JNIEXPORT jint JNICALL 610Java_sun_jvm_hotspot_debugger_macosx_MacOSXDebuggerLocal_translateTID0( 611 JNIEnv *env, jobject this_obj, jint tid) 612{ 613 print_debug("translateTID0 called on tid = 0x%x\n", (int)tid); 614 615 kern_return_t result; 616 thread_t foreign_tid, usable_tid; 617 mach_msg_type_name_t type; 618 619 foreign_tid = tid; 620 621 task_t gTask = getTask(env, this_obj); 622 result = mach_port_extract_right(gTask, foreign_tid, 623 MACH_MSG_TYPE_COPY_SEND, 624 &usable_tid, &type); 625 if (result != KERN_SUCCESS) 626 return -1; 627 628 print_debug("translateTID0: 0x%x -> 0x%x\n", foreign_tid, usable_tid); 629 630 return (jint) usable_tid; 631} 632 633 634static bool ptrace_continue(pid_t pid, int signal) { 635 // pass the signal to the process so we don't swallow it 636 int res; 637 if ((res = ptrace(PT_CONTINUE, pid, (caddr_t)1, signal)) < 0) { 638 print_error("attach: ptrace(PT_CONTINUE, %d) failed with %d\n", pid, res); 639 return false; 640 } 641 return true; 642} 643 644// waits until the ATTACH has stopped the process 645// by signal SIGSTOP 646static bool ptrace_waitpid(pid_t pid) { 647 int ret; 648 int status; 649 while (true) { 650 // Wait for debuggee to stop. 651 ret = waitpid(pid, &status, 0); 652 if (ret >= 0) { 653 if (WIFSTOPPED(status)) { 654 // Any signal will stop the thread, make sure it is SIGSTOP. Otherwise SIGSTOP 655 // will still be pending and delivered when the process is DETACHED and the process 656 // will go to sleep. 657 if (WSTOPSIG(status) == SIGSTOP) { 658 // Debuggee stopped by SIGSTOP. 659 return true; 660 } 661 if (!ptrace_continue(pid, WSTOPSIG(status))) { 662 print_error("attach: Failed to correctly attach to VM. VM might HANG! [PTRACE_CONT failed, stopped by %d]\n", WSTOPSIG(status)); 663 return false; 664 } 665 } else { 666 print_error("attach: waitpid(): Child process exited/terminated (status = 0x%x)\n", status); 667 return false; 668 } 669 } else { 670 switch (errno) { 671 case EINTR: 672 continue; 673 break; 674 case ECHILD: 675 print_error("attach: waitpid() failed. Child process pid (%d) does not exist \n", pid); 676 break; 677 case EINVAL: 678 print_error("attach: waitpid() failed. Invalid options argument.\n"); 679 break; 680 default: 681 print_error("attach: waitpid() failed. Unexpected error %d\n",errno); 682 break; 683 } 684 return false; 685 } 686 } 687} 688 689// attach to a process/thread specified by "pid" 690static bool ptrace_attach(pid_t pid) { 691 int res; 692 if ((res = ptrace(PT_ATTACHEXC, pid, 0, 0)) < 0) { 693 print_error("ptrace(PT_ATTACHEXC, %d) failed with %d\n", pid, res); 694 return false; 695 } else { 696 return ptrace_waitpid(pid); 697 } 698} 699 700/* 701 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal 702 * Method: attach0 703 * Signature: (I)V 704 */ 705JNIEXPORT void JNICALL 706Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__I( 707 JNIEnv *env, jobject this_obj, jint jpid) 708{ 709 print_debug("attach0 called for jpid=%d\n", (int)jpid); 710 711JNF_COCOA_ENTER(env); 712 713 kern_return_t result; 714 task_t gTask = 0; 715 result = task_for_pid(mach_task_self(), jpid, &gTask); 716 if (result != KERN_SUCCESS) { 717 print_error("attach: task_for_pid(%d) failed: '%s' (%d)\n", (int)jpid, mach_error_string(result), result); 718 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the process. Could be caused by an incorrect pid or lack of privileges."); 719 } 720 putTask(env, this_obj, gTask); 721 722 // use ptrace to stop the process 723 // on os x, ptrace only needs to be called on the process, not the individual threads 724 if (ptrace_attach(jpid) != true) { 725 mach_port_deallocate(mach_task_self(), gTask); 726 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the process"); 727 } 728 729 id symbolicator = nil; 730 id jrsSymbolicator = objc_lookUpClass("JRSSymbolicator"); 731 if (jrsSymbolicator != nil) { 732 id (*dynamicCall)(id, SEL, pid_t) = (id (*)(id, SEL, pid_t))&objc_msgSend; 733 symbolicator = dynamicCall(jrsSymbolicator, @selector(symbolicatorForPid:), (pid_t)jpid); 734 } 735 if (symbolicator != nil) { 736 CFRetain(symbolicator); // pin symbolicator while in java heap 737 } 738 739 putSymbolicator(env, this_obj, symbolicator); 740 if (symbolicator == nil) { 741 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach symbolicator to the process"); 742 } 743 744JNF_COCOA_EXIT(env); 745} 746 747/** For core file, 748 called from Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2 */ 749static void fillLoadObjects(JNIEnv* env, jobject this_obj, struct ps_prochandle* ph) { 750 int n = 0, i = 0; 751 752 // add load objects 753 n = get_num_libs(ph); 754 for (i = 0; i < n; i++) { 755 uintptr_t base; 756 const char* name; 757 jobject loadObject; 758 jobject loadObjectList; 759 jstring nameString; 760 761 base = get_lib_base(ph, i); 762 name = get_lib_name(ph, i); 763 nameString = (*env)->NewStringUTF(env, name); 764 CHECK_EXCEPTION; 765 loadObject = (*env)->CallObjectMethod(env, this_obj, createLoadObject_ID, 766 nameString, (jlong)0, (jlong)base); 767 CHECK_EXCEPTION; 768 loadObjectList = (*env)->GetObjectField(env, this_obj, loadObjectList_ID); 769 CHECK_EXCEPTION; 770 (*env)->CallBooleanMethod(env, loadObjectList, listAdd_ID, loadObject); 771 CHECK_EXCEPTION; 772 } 773} 774 775/* 776 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal 777 * Method: attach0 778 * Signature: (Ljava/lang/String;Ljava/lang/String;)V 779 */ 780JNIEXPORT void JNICALL 781Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2( 782 JNIEnv *env, jobject this_obj, jstring execName, jstring coreName) 783{ 784 const char *execName_cstr; 785 const char *coreName_cstr; 786 jboolean isCopy; 787 struct ps_prochandle* ph; 788 789 execName_cstr = (*env)->GetStringUTFChars(env, execName, &isCopy); 790 CHECK_EXCEPTION; 791 coreName_cstr = (*env)->GetStringUTFChars(env, coreName, &isCopy); 792 CHECK_EXCEPTION; 793 794 print_debug("attach: %s %s\n", execName_cstr, coreName_cstr); 795 796 if ( (ph = Pgrab_core(execName_cstr, coreName_cstr)) == NULL) { 797 (*env)->ReleaseStringUTFChars(env, execName, execName_cstr); 798 (*env)->ReleaseStringUTFChars(env, coreName, coreName_cstr); 799 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the core file"); 800 } 801 (*env)->SetLongField(env, this_obj, p_ps_prochandle_ID, (jlong)(intptr_t)ph); 802 (*env)->ReleaseStringUTFChars(env, execName, execName_cstr); 803 (*env)->ReleaseStringUTFChars(env, coreName, coreName_cstr); 804 fillLoadObjects(env, this_obj, ph); 805} 806 807/* 808 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal 809 * Method: detach0 810 * Signature: ()V 811 */ 812JNIEXPORT void JNICALL 813Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_detach0( 814 JNIEnv *env, jobject this_obj) 815{ 816 print_debug("detach0 called\n"); 817 struct ps_prochandle* ph = get_proc_handle(env, this_obj); 818 if (ph != NULL && ph->core != NULL) { 819 Prelease(ph); 820 return; 821 } 822JNF_COCOA_ENTER(env); 823 task_t gTask = getTask(env, this_obj); 824 825 // detach from the ptraced process causing it to resume execution 826 int pid; 827 kern_return_t k_res; 828 k_res = pid_for_task(gTask, &pid); 829 if (k_res != KERN_SUCCESS) { 830 print_error("detach: pid_for_task(%d) failed (%d)\n", pid, k_res); 831 } 832 else { 833 int res = ptrace(PT_DETACH, pid, 0, 0); 834 if (res < 0) { 835 print_error("detach: ptrace(PT_DETACH, %d) failed (%d)\n", pid, res); 836 } 837 } 838 839 mach_port_deallocate(mach_task_self(), gTask); 840 id symbolicator = getSymbolicator(env, this_obj); 841 if (symbolicator != nil) { 842 CFRelease(symbolicator); 843 } 844JNF_COCOA_EXIT(env); 845} 846