rev 54099 : 8257988: Remove JNF dependency from libsaproc/MacosxDebuggerLocal.m
Reviewed-by: yan

   1 /*
   2  * Copyright (c) 2002, 2020, 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 <string.h>
  37 #import <stdarg.h>
  38 #import <stdlib.h>
  39 #import <strings.h>
  40 #import <dlfcn.h>
  41 #import <limits.h>
  42 #import <errno.h>
  43 #import <sys/types.h>
  44 #import <sys/ptrace.h>
  45 #include "libproc_impl.h"
  46 
  47 #define UNSUPPORTED_ARCH "Unsupported architecture!"
  48 
  49 #if defined(x86_64) && !defined(amd64)
  50 #define amd64 1
  51 #endif
  52 
  53 #if amd64
  54 #include "sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext.h"
  55 #else
  56 #error UNSUPPORTED_ARCH
  57 #endif
  58 
  59 static jfieldID symbolicatorID = 0; // set in _init0
  60 static jfieldID taskID = 0; // set in _init0
  61 
  62 static jfieldID p_ps_prochandle_ID = 0;
  63 static jfieldID loadObjectList_ID = 0;
  64 static jmethodID listAdd_ID = 0;
  65 
  66 static jmethodID createClosestSymbol_ID = 0;
  67 static jmethodID createLoadObject_ID = 0;
  68 static jmethodID getJavaThreadsInfo_ID = 0;
  69 
  70 // indicator if thread id (lwpid_t) was set
  71 static bool _threads_filled = false;
  72 
  73 // mach_exc_server defined in the generated mach_excServer.c
  74 extern boolean_t mach_exc_server(mach_msg_header_t *input_msg_hdr,
  75                                  mach_msg_header_t *output_msg_hdr);
  76 
  77 kern_return_t catch_mach_exception_raise(
  78   mach_port_t exception_port, mach_port_t thread,
  79   mach_port_t task, exception_type_t exception,
  80   mach_exception_data_t code,
  81   mach_msg_type_number_t code_cnt);
  82 
  83 kern_return_t catch_mach_exception_raise_state(
  84   mach_port_t exception_port, exception_type_t exception,
  85   const mach_exception_data_t code, mach_msg_type_number_t code_cnt,
  86   int *flavor, const thread_state_t old_state,
  87   mach_msg_type_number_t old_state_cnt, thread_state_t new_state,
  88   mach_msg_type_number_t *new_state_cnt);
  89 
  90 kern_return_t catch_mach_exception_raise_state_identity(
  91   mach_port_t exception_port, mach_port_t thread, mach_port_t task,
  92   exception_type_t exception, mach_exception_data_t code,
  93   mach_msg_type_number_t code_cnt, int *flavor, thread_state_t old_state,
  94   mach_msg_type_number_t old_state_cnt, thread_state_t new_state,
  95   mach_msg_type_number_t *new_state_cnt);
  96 
  97 static struct exception_saved_state {
  98   exception_mask_t       saved_masks[EXC_TYPES_COUNT];
  99   mach_port_t            saved_ports[EXC_TYPES_COUNT];
 100   exception_behavior_t   saved_behaviors[EXC_TYPES_COUNT];
 101   thread_state_flavor_t  saved_flavors[EXC_TYPES_COUNT];
 102   mach_msg_type_number_t saved_exception_types_count;
 103 } exception_saved_state;
 104 
 105 static mach_port_t tgt_exception_port;
 106 
 107 // Mirrors __Reply__mach_exception_raise_t generated in mach_excServer.c
 108 static struct rep_msg {
 109   mach_msg_header_t header;
 110   NDR_record_t ndr;
 111   kern_return_t ret_code;
 112 } rep_msg;
 113 
 114 // Mirrors __Request__mach_exception_raise_t generated in mach_excServer.c
 115 // with a large trailing pad to avoid MACH_MSG_RCV_TOO_LARGE
 116 static struct exc_msg {
 117   mach_msg_header_t header;
 118   // start of the kernel processed data
 119   mach_msg_body_t msgh_body;
 120   mach_msg_port_descriptor_t thread;
 121   mach_msg_port_descriptor_t task;
 122   // end of the kernel processed data
 123   NDR_record_t ndr;
 124   exception_type_t exception;
 125   mach_msg_type_number_t code_cnt;
 126   mach_exception_data_t code; // an array of int64_t
 127   char pad[512];
 128 } exc_msg;
 129 
 130 static void putSymbolicator(JNIEnv *env, jobject this_obj, id symbolicator) {
 131   (*env)->SetLongField(env, this_obj, symbolicatorID, (jlong)(intptr_t)symbolicator);
 132 }
 133 
 134 static id getSymbolicator(JNIEnv *env, jobject this_obj) {
 135   jlong ptr = (*env)->GetLongField(env, this_obj, symbolicatorID);
 136   return (id)(intptr_t)ptr;
 137 }
 138 
 139 static void putTask(JNIEnv *env, jobject this_obj, task_t task) {
 140   (*env)->SetLongField(env, this_obj, taskID, (jlong)task);
 141 }
 142 
 143 static task_t getTask(JNIEnv *env, jobject this_obj) {
 144   jlong ptr = (*env)->GetLongField(env, this_obj, taskID);
 145   return (task_t)ptr;
 146 }
 147 
 148 #define CHECK_EXCEPTION_(value) if ((*env)->ExceptionOccurred(env)) { return value; }
 149 #define CHECK_EXCEPTION if ((*env)->ExceptionOccurred(env)) { return;}
 150 #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throw_new_debugger_exception(env, str); return value; }
 151 #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throw_new_debugger_exception(env, str); return;}
 152 #define CHECK_EXCEPTION_CLEAR if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); }
 153 #define CHECK_EXCEPTION_CLEAR_VOID if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); return; }
 154 #define CHECK_EXCEPTION_CLEAR_(value) if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); return value; }
 155 
 156 static void throw_new_debugger_exception(JNIEnv* env, const char* errMsg) {
 157   jclass exceptionClass = (*env)->FindClass(env, "sun/jvm/hotspot/debugger/DebuggerException");
 158   CHECK_EXCEPTION;
 159   (*env)->ThrowNew(env, exceptionClass, errMsg);
 160 }
 161 
 162 static struct ps_prochandle* get_proc_handle(JNIEnv* env, jobject this_obj) {
 163   jlong ptr = (*env)->GetLongField(env, this_obj, p_ps_prochandle_ID);
 164   return (struct ps_prochandle*)(intptr_t)ptr;
 165 }
 166 
 167 #if defined(__i386__)
 168     #define hsdb_thread_state_t     x86_thread_state32_t
 169     #define hsdb_float_state_t      x86_float_state32_t
 170     #define HSDB_THREAD_STATE       x86_THREAD_STATE32
 171     #define HSDB_FLOAT_STATE        x86_FLOAT_STATE32
 172     #define HSDB_THREAD_STATE_COUNT x86_THREAD_STATE32_COUNT
 173     #define HSDB_FLOAT_STATE_COUNT  x86_FLOAT_STATE32_COUNT
 174 #elif defined(__x86_64__)
 175     #define hsdb_thread_state_t     x86_thread_state64_t
 176     #define hsdb_float_state_t      x86_float_state64_t
 177     #define HSDB_THREAD_STATE       x86_THREAD_STATE64
 178     #define HSDB_FLOAT_STATE        x86_FLOAT_STATE64
 179     #define HSDB_THREAD_STATE_COUNT x86_THREAD_STATE64_COUNT
 180     #define HSDB_FLOAT_STATE_COUNT  x86_FLOAT_STATE64_COUNT
 181 #else
 182     #error UNSUPPORTED_ARCH
 183 #endif
 184 
 185 /*
 186  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 187  * Method:    init0
 188  * Signature: ()V
 189  */
 190 JNIEXPORT void JNICALL
 191 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_init0(JNIEnv *env, jclass cls) {
 192   symbolicatorID = (*env)->GetFieldID(env, cls, "symbolicator", "J");
 193   CHECK_EXCEPTION;
 194   taskID = (*env)->GetFieldID(env, cls, "task", "J");
 195   CHECK_EXCEPTION;
 196 
 197   // for core file
 198   p_ps_prochandle_ID = (*env)->GetFieldID(env, cls, "p_ps_prochandle", "J");
 199   CHECK_EXCEPTION;
 200   loadObjectList_ID = (*env)->GetFieldID(env, cls, "loadObjectList", "Ljava/util/List;");
 201   CHECK_EXCEPTION;
 202 
 203   // methods we use
 204   createClosestSymbol_ID = (*env)->GetMethodID(env, cls, "createClosestSymbol",
 205                     "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
 206   CHECK_EXCEPTION;
 207   createLoadObject_ID = (*env)->GetMethodID(env, cls, "createLoadObject",
 208                     "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
 209   CHECK_EXCEPTION;
 210 
 211   // java.util.List method we call
 212   jclass listClass = (*env)->FindClass(env, "java/util/List");
 213   CHECK_EXCEPTION;
 214   listAdd_ID = (*env)->GetMethodID(env, listClass, "add", "(Ljava/lang/Object;)Z");
 215   CHECK_EXCEPTION;
 216   getJavaThreadsInfo_ID = (*env)->GetMethodID(env, cls, "getJavaThreadsInfo",
 217                                                      "()[J");
 218   CHECK_EXCEPTION;
 219 
 220   init_libproc(getenv("LIBSAPROC_DEBUG") != NULL);
 221 }
 222 
 223 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getAddressSize
 224   (JNIEnv *env, jclass cls)
 225 {
 226 #ifdef _LP64
 227   return 8;
 228 #else
 229   #error UNSUPPORTED_ARCH
 230 #endif
 231 }
 232 
 233 /** called by Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByName0 */
 234 jlong lookupByNameIncore(
 235   JNIEnv *env, struct ps_prochandle *ph, jobject this_obj, jstring objectName, jstring symbolName)
 236 {
 237   const char *objectName_cstr, *symbolName_cstr;
 238   jlong addr;
 239   jboolean isCopy;
 240   objectName_cstr = NULL;
 241   if (objectName != NULL) {
 242     objectName_cstr = (*env)->GetStringUTFChars(env, objectName, &isCopy);
 243     CHECK_EXCEPTION_(0);
 244   }
 245   symbolName_cstr = (*env)->GetStringUTFChars(env, symbolName, &isCopy);
 246   if ((*env)->ExceptionOccurred(env)) {
 247     if (objectName_cstr != NULL) {
 248       (*env)->ReleaseStringUTFChars(env, objectName, objectName_cstr);
 249     }
 250     return 0;
 251   }
 252 
 253   print_debug("look for %s \n", symbolName_cstr);
 254   addr = (jlong) lookup_symbol(ph, objectName_cstr, symbolName_cstr);
 255 
 256   if (objectName_cstr != NULL) {
 257     (*env)->ReleaseStringUTFChars(env, objectName, objectName_cstr);
 258   }
 259   (*env)->ReleaseStringUTFChars(env, symbolName, symbolName_cstr);
 260   return addr;
 261 }
 262 

































 263 /*
 264  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 265  * Method:    lookupByName0
 266  * Signature: (Ljava/lang/String;Ljava/lang/String;)J
 267  */
 268 JNIEXPORT jlong JNICALL
 269 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByName0(
 270   JNIEnv *env, jobject this_obj,
 271   jstring objectName, jstring symbolName)
 272 {
 273   struct ps_prochandle* ph = get_proc_handle(env, this_obj);
 274   if (ph != NULL && ph->core != NULL) {
 275     return lookupByNameIncore(env, ph, this_obj, objectName, symbolName);
 276   }
 277 
 278   jlong address = 0;
 279 
 280 JNF_COCOA_ENTER(env);
 281   NSString *symbolNameString = JNFJavaToNSString(env, symbolName);

 282 
 283   print_debug("lookupInProcess called for %s\n", [symbolNameString UTF8String]);
 284 
 285   id symbolicator = getSymbolicator(env, this_obj);
 286   if (symbolicator != nil) {
 287     uint64_t (*dynamicCall)(id, SEL, NSString *) = (uint64_t (*)(id, SEL, NSString *))&objc_msgSend;
 288     address = (jlong) dynamicCall(symbolicator, @selector(addressForSymbol:), symbolNameString);
 289   }
 290 
 291   print_debug("address of symbol %s = %llx\n", [symbolNameString UTF8String], address);
 292 JNF_COCOA_EXIT(env);
 293 
 294   return address;
 295 }
 296 
 297 /*
 298  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 299  * Method:    lookupByAddress0
 300  * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
 301  */
 302 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByAddress0
 303   (JNIEnv *env, jobject this_obj, jlong addr) {
 304   uintptr_t offset;
 305   const char* sym = NULL;
 306   jstring sym_string;
 307 
 308   struct ps_prochandle* ph = get_proc_handle(env, this_obj);
 309   if (ph != NULL && ph->core != NULL) {
 310     sym = symbol_for_pc(ph, (uintptr_t) addr, &offset);
 311     if (sym == NULL) return 0;
 312     sym_string = (*env)->NewStringUTF(env, sym);
 313     CHECK_EXCEPTION_(0);
 314     return (*env)->CallObjectMethod(env, this_obj, createClosestSymbol_ID,
 315                                                 sym_string, (jlong)offset);
 316   }
 317   return 0;
 318 }
 319 
 320 /** called from Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_readBytesFromProcess0 */
 321 jbyteArray readBytesFromCore(
 322   JNIEnv *env, struct ps_prochandle *ph, jobject this_obj, jlong addr, jlong numBytes)
 323 {
 324   jboolean isCopy;
 325   jbyteArray array;
 326   jbyte *bufPtr;
 327   ps_err_e err;
 328 
 329   array = (*env)->NewByteArray(env, numBytes);
 330   CHECK_EXCEPTION_(0);
 331   bufPtr = (*env)->GetByteArrayElements(env, array, &isCopy);
 332   CHECK_EXCEPTION_(0);
 333 
 334   err = ps_pread(ph, (psaddr_t) (uintptr_t)addr, bufPtr, numBytes);
 335   (*env)->ReleaseByteArrayElements(env, array, bufPtr, 0);
 336   return (err == PS_OK)? array : 0;
 337 }
 338 
 339 /*
 340  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 341  * Method:    readBytesFromProcess0
 342  * Signature: (JJ)Lsun/jvm/hotspot/debugger/ReadResult;
 343  */
 344 JNIEXPORT jbyteArray JNICALL
 345 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_readBytesFromProcess0(
 346   JNIEnv *env, jobject this_obj,
 347   jlong addr, jlong numBytes)
 348 {
 349   print_debug("readBytesFromProcess called. addr = %llx numBytes = %lld\n", addr, numBytes);
 350 
 351   // must allocate storage instead of using former parameter buf
 352   jbyteArray array;
 353 
 354   struct ps_prochandle* ph = get_proc_handle(env, this_obj);
 355   if (ph != NULL && ph->core != NULL) {
 356     return readBytesFromCore(env, ph, this_obj, addr, numBytes);
 357   }
 358 
 359   array = (*env)->NewByteArray(env, numBytes);
 360   CHECK_EXCEPTION_(0);
 361 
 362   unsigned long alignedAddress;
 363   unsigned long alignedLength = 0;
 364   kern_return_t result;
 365   vm_offset_t *pages;
 366   int *mapped;
 367   long pageCount;
 368   uint byteCount;
 369   int i;
 370   unsigned long remaining;
 371 
 372   alignedAddress = trunc_page(addr);
 373   if (addr != alignedAddress) {
 374     alignedLength += addr - alignedAddress;
 375   }
 376   alignedLength = round_page(numBytes);
 377   pageCount = alignedLength/vm_page_size;
 378 
 379   // Allocate storage for pages and flags.
 380   pages = malloc(pageCount * sizeof(vm_offset_t));
 381   if (pages == NULL) {
 382     (*env)->DeleteLocalRef(env, array);
 383     return NULL;
 384   }
 385   mapped = calloc(pageCount, sizeof(int));
 386   if (mapped == NULL) {
 387     (*env)->DeleteLocalRef(env, array);
 388     free(pages);
 389     return NULL;
 390   }
 391 
 392   task_t gTask = getTask(env, this_obj);
 393   // Try to read each of the pages.
 394   for (i = 0; i < pageCount; i++) {
 395     result = vm_read(gTask, alignedAddress + i*vm_page_size, vm_page_size,
 396                      &pages[i], &byteCount);
 397     mapped[i] = (result == KERN_SUCCESS);
 398     // assume all failures are unmapped pages
 399   }
 400 
 401   print_debug("%ld pages\n", pageCount);
 402 
 403   remaining = numBytes;
 404 
 405   for (i = 0; i < pageCount; i++) {
 406     unsigned long len = vm_page_size;
 407     unsigned long start = 0;
 408 
 409     if (i == 0) {
 410       start = addr - alignedAddress;
 411       len = vm_page_size - start;
 412     }
 413 
 414     if (i == (pageCount - 1)) {
 415       len = remaining;
 416     }
 417 
 418     if (mapped[i]) {
 419       print_debug("page %d mapped (len %ld start %ld)\n", i, len, start);
 420       (*env)->SetByteArrayRegion(env, array, 0, len, ((jbyte *) pages[i] + start));
 421       vm_deallocate(mach_task_self(), pages[i], vm_page_size);
 422     }
 423 
 424     remaining -= len;
 425   }
 426 
 427   free (pages);
 428   free (mapped);
 429   return array;
 430 }
 431 
 432 /** Only used for core file reading, set thread_id for threads which is got after core file parsed.
 433   * Thread context is available in Mach-O core file but thread id is not. We can get thread id
 434   * from Threads which store all java threads information when they are created. Here we can identify
 435   * them as java threads by checking if a thread's rsp or rbp within a java thread's stack.
 436   * Note Macosx uses unique_thread_id which is different from other platforms though printed ids
 437   * are still pthread id. Function BsdDebuggerLocal.getJavaThreadsInfo returns an array of long
 438   * integers to host all java threads' id, stack_start, stack_end as:
 439   * [uid0, stack_start0, stack_end0, uid1, stack_start1, stack_end1, ...]
 440   *
 441   * The work cannot be done at init0 since Threads is not available yet(VM not initialized yet).
 442   * This function should be called only once if succeeded
 443   */
 444 bool fill_java_threads(JNIEnv* env, jobject this_obj, struct ps_prochandle* ph) {
 445   int n = 0, i = 0, j;
 446   struct reg regs;
 447 
 448   jlongArray thrinfos = (*env)->CallObjectMethod(env, this_obj, getJavaThreadsInfo_ID);
 449   CHECK_EXCEPTION_(false);
 450   int len = (int)(*env)->GetArrayLength(env, thrinfos);
 451   uint64_t* cinfos = (uint64_t *)(*env)->GetLongArrayElements(env, thrinfos, NULL);
 452   CHECK_EXCEPTION_(false);
 453   n = get_num_threads(ph);
 454   print_debug("fill_java_threads called, num_of_thread = %d\n", n);
 455   for (i = 0; i < n; i++) {
 456     if (!get_nth_lwp_regs(ph, i, &regs)) {
 457       print_debug("Could not get regs of thread %d, already set!\n", i);
 458       return false;
 459     }
 460     for (j = 0; j < len; j += 3) {
 461       lwpid_t  uid = cinfos[j];
 462       uint64_t beg = cinfos[j + 1];
 463       uint64_t end = cinfos[j + 2];
 464       if ((regs.r_rsp < end && regs.r_rsp >= beg) ||
 465           (regs.r_rbp < end && regs.r_rbp >= beg)) {
 466         set_lwp_id(ph, i, uid);
 467         break;
 468       }
 469     }
 470   }
 471   (*env)->ReleaseLongArrayElements(env, thrinfos, (jlong*)cinfos, 0);
 472   CHECK_EXCEPTION_(false);
 473   return true;
 474 }
 475 
 476 /* For core file only, called from
 477  * Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getThreadIntegerRegisterSet0
 478  */
 479 jlongArray getThreadIntegerRegisterSetFromCore(JNIEnv *env, jobject this_obj, long lwp_id, struct ps_prochandle* ph) {
 480   if (!_threads_filled)  {
 481     if (!fill_java_threads(env, this_obj, ph)) {
 482       throw_new_debugger_exception(env, "Failed to fill in threads");
 483       return 0;
 484     } else {
 485       _threads_filled = true;
 486     }
 487   }
 488 
 489   struct reg gregs;
 490   jboolean isCopy;
 491   jlongArray array;
 492   jlong *regs;
 493 
 494   if (get_lwp_regs(ph, lwp_id, &gregs) != true) {
 495     THROW_NEW_DEBUGGER_EXCEPTION_("get_thread_regs failed for a lwp", 0);
 496   }
 497 
 498 #undef NPRGREG
 499 #undef REG_INDEX
 500 #if amd64
 501 #define NPRGREG sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_NPRGREG
 502 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_##reg
 503 
 504   array = (*env)->NewLongArray(env, NPRGREG);
 505   CHECK_EXCEPTION_(0);
 506   regs = (*env)->GetLongArrayElements(env, array, &isCopy);
 507 
 508   regs[REG_INDEX(R15)] = gregs.r_r15;
 509   regs[REG_INDEX(R14)] = gregs.r_r14;
 510   regs[REG_INDEX(R13)] = gregs.r_r13;
 511   regs[REG_INDEX(R12)] = gregs.r_r12;
 512   regs[REG_INDEX(RBP)] = gregs.r_rbp;
 513   regs[REG_INDEX(RBX)] = gregs.r_rbx;
 514   regs[REG_INDEX(R11)] = gregs.r_r11;
 515   regs[REG_INDEX(R10)] = gregs.r_r10;
 516   regs[REG_INDEX(R9)]  = gregs.r_r9;
 517   regs[REG_INDEX(R8)]  = gregs.r_r8;
 518   regs[REG_INDEX(RAX)] = gregs.r_rax;
 519   regs[REG_INDEX(RCX)] = gregs.r_rcx;
 520   regs[REG_INDEX(RDX)] = gregs.r_rdx;
 521   regs[REG_INDEX(RSI)] = gregs.r_rsi;
 522   regs[REG_INDEX(RDI)] = gregs.r_rdi;
 523   regs[REG_INDEX(RIP)] = gregs.r_rip;
 524   regs[REG_INDEX(CS)]  = gregs.r_cs;
 525   regs[REG_INDEX(RSP)] = gregs.r_rsp;
 526   regs[REG_INDEX(SS)]  = gregs.r_ss;
 527   regs[REG_INDEX(FSBASE)] = 0;
 528   regs[REG_INDEX(GSBASE)] = 0;
 529   regs[REG_INDEX(DS)] = gregs.r_ds;
 530   regs[REG_INDEX(ES)] = gregs.r_es;
 531   regs[REG_INDEX(FS)] = gregs.r_fs;
 532   regs[REG_INDEX(GS)] = gregs.r_gs;
 533   regs[REG_INDEX(TRAPNO)] = gregs.r_trapno;
 534   regs[REG_INDEX(RFL)]    = gregs.r_rflags;
 535 
 536 #endif /* amd64 */
 537   (*env)->ReleaseLongArrayElements(env, array, regs, JNI_COMMIT);
 538   return array;
 539 }
 540 
 541 /*
 542  * Lookup the thread_t that corresponds to the given thread_id.
 543  * The thread_id should be the result from calling thread_info() with THREAD_IDENTIFIER_INFO
 544  * and reading the m_ident_info.thread_id returned.
 545  * The returned thread_t is the mach send right to the kernel port for the corresponding thread.
 546  *
 547  * We cannot simply use the OSThread._thread_id field in the JVM. This is set to ::mach_thread_self()
 548  * in the VM, but that thread port is not valid for a remote debugger to access the thread.
 549  */
 550 thread_t
 551 lookupThreadFromThreadId(task_t task, jlong thread_id) {
 552   print_debug("lookupThreadFromThreadId thread_id=0x%llx\n", thread_id);
 553 
 554   thread_array_t thread_list = NULL;
 555   mach_msg_type_number_t thread_list_count = 0;
 556   thread_t result_thread = 0;
 557   int i;
 558 
 559   // get the list of all the send rights
 560   kern_return_t result = task_threads(task, &thread_list, &thread_list_count);
 561   if (result != KERN_SUCCESS) {
 562     print_debug("task_threads returned 0x%x\n", result);
 563     return 0;
 564   }
 565 
 566   for(i = 0 ; i < thread_list_count; i++) {
 567     thread_identifier_info_data_t m_ident_info;
 568     mach_msg_type_number_t count = THREAD_IDENTIFIER_INFO_COUNT;
 569 
 570     // get the THREAD_IDENTIFIER_INFO for the send right
 571     result = thread_info(thread_list[i], THREAD_IDENTIFIER_INFO, (thread_info_t) &m_ident_info, &count);
 572     if (result != KERN_SUCCESS) {
 573       print_debug("thread_info returned 0x%x\n", result);
 574       break;
 575     }
 576 
 577     // if this is the one we're looking for, return the send right
 578     if (thread_id == m_ident_info.thread_id)
 579     {
 580       result_thread = thread_list[i];
 581       break;
 582     }
 583   }
 584 
 585   vm_size_t thread_list_size = (vm_size_t) (thread_list_count * sizeof (thread_t));
 586   vm_deallocate(mach_task_self(), (vm_address_t) thread_list, thread_list_count);
 587 
 588   return result_thread;
 589 }
 590 
 591 
 592 /*
 593  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 594  * Method:    getThreadIntegerRegisterSet0
 595  * Signature: (J)[J
 596  */
 597 JNIEXPORT jlongArray JNICALL
 598 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getThreadIntegerRegisterSet0(
 599   JNIEnv *env, jobject this_obj,
 600   jlong thread_id)
 601 {
 602   print_debug("getThreadRegisterSet0 called\n");
 603 
 604   struct ps_prochandle* ph = get_proc_handle(env, this_obj);
 605   if (ph != NULL && ph->core != NULL) {
 606     return getThreadIntegerRegisterSetFromCore(env, this_obj, thread_id, ph);
 607   }
 608 
 609   kern_return_t result;
 610   thread_t tid;
 611   mach_msg_type_number_t count = HSDB_THREAD_STATE_COUNT;
 612   hsdb_thread_state_t state;
 613   jlongArray registerArray;
 614   jlong *primitiveArray;
 615   task_t gTask = getTask(env, this_obj);
 616 
 617   tid = lookupThreadFromThreadId(gTask, thread_id);
 618 
 619   result = thread_get_state(tid, HSDB_THREAD_STATE, (thread_state_t)&state, &count);
 620 
 621   if (result != KERN_SUCCESS) {
 622     print_error("getregs: thread_get_state(%d) failed (%d)\n", tid, result);
 623     return NULL;
 624   }
 625 
 626 #if amd64
 627 #define NPRGREG sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_NPRGREG
 628 #undef REG_INDEX
 629 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_##reg
 630 
 631   // 64 bit
 632   print_debug("Getting threads for a 64-bit process\n");
 633   registerArray = (*env)->NewLongArray(env, NPRGREG);
 634   CHECK_EXCEPTION_(0);
 635   primitiveArray = (*env)->GetLongArrayElements(env, registerArray, NULL);
 636 
 637   primitiveArray[REG_INDEX(R15)] = state.__r15;
 638   primitiveArray[REG_INDEX(R14)] = state.__r14;
 639   primitiveArray[REG_INDEX(R13)] = state.__r13;
 640   primitiveArray[REG_INDEX(R12)] = state.__r12;
 641   primitiveArray[REG_INDEX(R11)] = state.__r11;
 642   primitiveArray[REG_INDEX(R10)] = state.__r10;
 643   primitiveArray[REG_INDEX(R9)]  = state.__r9;
 644   primitiveArray[REG_INDEX(R8)]  = state.__r8;
 645   primitiveArray[REG_INDEX(RDI)] = state.__rdi;
 646   primitiveArray[REG_INDEX(RSI)] = state.__rsi;
 647   primitiveArray[REG_INDEX(RBP)] = state.__rbp;
 648   primitiveArray[REG_INDEX(RBX)] = state.__rbx;
 649   primitiveArray[REG_INDEX(RDX)] = state.__rdx;
 650   primitiveArray[REG_INDEX(RCX)] = state.__rcx;
 651   primitiveArray[REG_INDEX(RAX)] = state.__rax;
 652   primitiveArray[REG_INDEX(TRAPNO)] = 0;            // trapno, not used
 653   primitiveArray[REG_INDEX(ERR)]    = 0;            // err, not used
 654   primitiveArray[REG_INDEX(RIP)] = state.__rip;
 655   primitiveArray[REG_INDEX(CS)]  = state.__cs;
 656   primitiveArray[REG_INDEX(RFL)] = state.__rflags;
 657   primitiveArray[REG_INDEX(RSP)] = state.__rsp;
 658   primitiveArray[REG_INDEX(SS)] = 0;                // We don't have SS
 659   primitiveArray[REG_INDEX(FS)] = state.__fs;
 660   primitiveArray[REG_INDEX(GS)] = state.__gs;
 661   primitiveArray[REG_INDEX(ES)] = 0;
 662   primitiveArray[REG_INDEX(DS)] = 0;
 663   primitiveArray[REG_INDEX(FSBASE)] = 0;
 664   primitiveArray[REG_INDEX(GSBASE)] = 0;
 665   print_debug("set registers\n");
 666 
 667   (*env)->ReleaseLongArrayElements(env, registerArray, primitiveArray, 0);
 668 
 669 #else
 670 #error UNSUPPORTED_ARCH
 671 #endif /* amd64 */
 672 
 673   return registerArray;
 674 }
 675 
 676 /*
 677  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 678  * Method:    translateTID0
 679  * Signature: (I)I
 680  */
 681 JNIEXPORT jint JNICALL
 682 Java_sun_jvm_hotspot_debugger_macosx_MacOSXDebuggerLocal_translateTID0(
 683   JNIEnv *env, jobject this_obj, jint tid) 
 684 {
 685   print_debug("translateTID0 called on tid = 0x%x\n", (int)tid);
 686 
 687   kern_return_t result;
 688   thread_t foreign_tid, usable_tid;
 689   mach_msg_type_name_t type;
 690   
 691   foreign_tid = tid;
 692     
 693   task_t gTask = getTask(env, this_obj);
 694   result = mach_port_extract_right(gTask, foreign_tid, 
 695                                    MACH_MSG_TYPE_COPY_SEND, 
 696                                    &usable_tid, &type);
 697   if (result != KERN_SUCCESS)
 698     return -1;
 699     
 700   print_debug("translateTID0: 0x%x -> 0x%x\n", foreign_tid, usable_tid);
 701     
 702   return (jint) usable_tid;
 703 }
 704 
 705 // attach to a process/thread specified by "pid"
 706 static bool ptrace_attach(pid_t pid) {
 707   errno = 0;
 708   ptrace(PT_ATTACHEXC, pid, 0, 0);
 709 
 710   if (errno != 0) {
 711     print_error("ptrace_attach: ptrace(PT_ATTACHEXC,...) failed: %s", strerror(errno));
 712     return false;
 713   }
 714   return true;
 715 }
 716 
 717 kern_return_t catch_mach_exception_raise(
 718   mach_port_t exception_port, mach_port_t thread_port, mach_port_t task_port,
 719   exception_type_t exception_type, mach_exception_data_t codes,
 720   mach_msg_type_number_t num_codes) {
 721 
 722   print_debug("catch_mach_exception_raise: Exception port = %d thread_port = %d "
 723               "task port %d exc type = %d num_codes %d\n",
 724               exception_port, thread_port, task_port, exception_type, num_codes);
 725 
 726   // This message should denote a Unix soft signal, with
 727   // 1. the exception type = EXC_SOFTWARE
 728   // 2. codes[0] (which is the code) = EXC_SOFT_SIGNAL
 729   // 3. codes[1] (which is the sub-code) = SIGSTOP
 730   if (!(exception_type == EXC_SOFTWARE &&
 731         codes[0] == EXC_SOFT_SIGNAL    &&
 732         codes[num_codes -1] == SIGSTOP)) {
 733     print_error("catch_mach_exception_raise: Message doesn't denote a Unix "
 734                 "soft signal. exception_type = %d, codes[0] = %d, "
 735                 "codes[num_codes -1] = %d, num_codes = %d\n",
 736                 exception_type, codes[0], codes[num_codes - 1], num_codes);
 737     return MACH_RCV_INVALID_TYPE;
 738   }
 739   return KERN_SUCCESS;
 740 }
 741 
 742 kern_return_t catch_mach_exception_raise_state(
 743   mach_port_t exception_port, exception_type_t exception, const mach_exception_data_t code,
 744   mach_msg_type_number_t code_cnt, int *flavor, const thread_state_t old_state,
 745   mach_msg_type_number_t old_state_cnt, thread_state_t new_state,
 746   mach_msg_type_number_t *new_state_cnt) {
 747   return MACH_RCV_INVALID_TYPE;
 748 }
 749 
 750 
 751 kern_return_t catch_mach_exception_raise_state_identity(
 752   mach_port_t exception_port, mach_port_t thread, mach_port_t task,
 753   exception_type_t exception, mach_exception_data_t code,
 754   mach_msg_type_number_t code_cnt, int *flavor,
 755   thread_state_t old_state, mach_msg_type_number_t old_state_cnt,
 756   thread_state_t new_state, mach_msg_type_number_t *new_state_cnt) {
 757   return MACH_RCV_INVALID_TYPE;
 758 }
 759 
 760 // wait to receive an exception message
 761 static bool wait_for_exception() {
 762   kern_return_t result;
 763 
 764   result = mach_msg(&exc_msg.header,
 765                     MACH_RCV_MSG,
 766                     0,
 767                     sizeof(exc_msg),
 768                     tgt_exception_port,
 769                     MACH_MSG_TIMEOUT_NONE,
 770                     MACH_PORT_NULL);
 771 
 772   if (result != MACH_MSG_SUCCESS) {
 773     print_error("attach: wait_for_exception: mach_msg() failed: '%s' (%d)\n",
 774                 mach_error_string(result), result);
 775     return false;
 776   }
 777 
 778   if (mach_exc_server(&exc_msg.header, &rep_msg.header) == false ||
 779       rep_msg.ret_code != KERN_SUCCESS) {
 780     print_error("attach: wait_for_exception: mach_exc_server failure\n");
 781     if (rep_msg.ret_code != KERN_SUCCESS) {
 782       print_error("catch_mach_exception_raise() failed '%s' (%d)\n",
 783                   mach_error_string(rep_msg.ret_code), rep_msg.ret_code);
 784     }
 785     return false;
 786   }
 787 
 788   print_debug("reply msg from mach_exc_server: (msg->{bits = %#x, size = %u, "
 789               "remote_port = %#x, local_port = %#x, reserved = 0x%x, id = 0x%x},)",
 790               rep_msg.header.msgh_bits, rep_msg.header.msgh_size,
 791               rep_msg.header.msgh_remote_port, rep_msg.header.msgh_local_port,
 792               rep_msg.header.msgh_reserved, rep_msg.header.msgh_id);
 793 
 794   return true;
 795 }
 796 
 797 /*
 798  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 799  * Method:    attach0
 800  * Signature: (I)V
 801  */
 802 JNIEXPORT void JNICALL
 803 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__I(
 804   JNIEnv *env, jobject this_obj, jint jpid)
 805 {
 806   print_debug("attach0 called for jpid=%d\n", (int)jpid);
 807 
 808 JNF_COCOA_ENTER(env);
 809 
 810   kern_return_t result;
 811   task_t gTask = 0;
 812 
 813   result = task_for_pid(mach_task_self(), jpid, &gTask);
 814   if (result != KERN_SUCCESS) {
 815     print_error("attach: task_for_pid(%d) failed: '%s' (%d)\n", (int)jpid, mach_error_string(result), result);
 816     THROW_NEW_DEBUGGER_EXCEPTION(
 817       "Can't attach to the process. Could be caused by an incorrect pid or lack of privileges.");
 818   }
 819   putTask(env, this_obj, gTask);
 820 
 821   // Allocate an exception port.
 822   result = mach_port_allocate(mach_task_self(),
 823                               MACH_PORT_RIGHT_RECEIVE,
 824                               &tgt_exception_port);
 825   if (result != KERN_SUCCESS) {
 826     print_error("attach: mach_port_allocate() for tgt_exception_port failed: '%s' (%d)\n",
 827                 mach_error_string(result), result);
 828     THROW_NEW_DEBUGGER_EXCEPTION(
 829       "Can't attach to the process. Couldn't allocate an exception port.");
 830   }
 831 
 832   // Enable the new exception port to send messages.
 833   result = mach_port_insert_right (mach_task_self(),
 834                                    tgt_exception_port,
 835                                    tgt_exception_port,
 836                                    MACH_MSG_TYPE_MAKE_SEND);
 837   if (result != KERN_SUCCESS) {
 838     print_error("attach: mach_port_insert_right() failed for port 0x%x: '%s' (%d)\n",
 839                 tgt_exception_port, mach_error_string(result), result);
 840     THROW_NEW_DEBUGGER_EXCEPTION(
 841       "Can't attach to the process. Couldn't add send privileges to the exception port.");
 842   }
 843 
 844   // Save the existing original exception ports registered with the target
 845   // process (for later restoration while detaching from the process).
 846   result = task_get_exception_ports(gTask,
 847                                     EXC_MASK_ALL,
 848                                     exception_saved_state.saved_masks,
 849                                     &exception_saved_state.saved_exception_types_count,
 850                                     exception_saved_state.saved_ports,
 851                                     exception_saved_state.saved_behaviors,
 852                                     exception_saved_state.saved_flavors);
 853 
 854   if (result != KERN_SUCCESS) {
 855     print_error("attach: task_get_exception_ports() failed: '%s' (%d)\n",
 856                 mach_error_string(result), result);
 857     THROW_NEW_DEBUGGER_EXCEPTION(
 858       "Can't attach to the process. Could not get the target exception ports.");
 859   }
 860 
 861   // register the exception port to be used for all future exceptions with the
 862   // target process.
 863   result = task_set_exception_ports(gTask,
 864                                     EXC_MASK_ALL,
 865                                     tgt_exception_port,
 866                                     EXCEPTION_DEFAULT | MACH_EXCEPTION_CODES,
 867                                     THREAD_STATE_NONE);
 868 
 869   if (result != KERN_SUCCESS) {
 870     print_error("attach: task_set_exception_ports() failed -- port 0x%x: '%s' (%d)\n",
 871                 tgt_exception_port, mach_error_string(result), result);
 872     mach_port_deallocate(mach_task_self(), gTask);
 873     mach_port_deallocate(mach_task_self(), tgt_exception_port);
 874     THROW_NEW_DEBUGGER_EXCEPTION(
 875       "Can't attach to the process. Could not register the exception port "
 876       "with the target process.");
 877   }
 878 
 879   // use ptrace to stop the process
 880   // on os x, ptrace only needs to be called on the process, not the individual threads
 881   if (ptrace_attach(jpid) != true) {
 882     print_error("attach: ptrace failure in attaching to %d\n", (int)jpid);
 883     mach_port_deallocate(mach_task_self(), gTask);
 884     mach_port_deallocate(mach_task_self(), tgt_exception_port);
 885     THROW_NEW_DEBUGGER_EXCEPTION("Can't ptrace attach to the process");
 886   }
 887 
 888   if (wait_for_exception() != true) {
 889     mach_port_deallocate(mach_task_self(), gTask);
 890     mach_port_deallocate(mach_task_self(), tgt_exception_port);
 891     THROW_NEW_DEBUGGER_EXCEPTION(
 892       "Can't attach to the process. Issues with reception of the exception message.");
 893   }
 894 
 895   // suspend all the threads in the task
 896   result = task_suspend(gTask);
 897   if (result != KERN_SUCCESS) {
 898     print_error("attach: task_suspend() failed: '%s' (%d)\n",
 899                 mach_error_string(result), result);
 900     mach_port_deallocate(mach_task_self(), gTask);
 901     mach_port_deallocate(mach_task_self(), tgt_exception_port);
 902     THROW_NEW_DEBUGGER_EXCEPTION("Can't attach. Unable to suspend all the threads in the task.");
 903   }
 904 
 905   id symbolicator = nil;
 906   id jrsSymbolicator = objc_lookUpClass("JRSSymbolicator");
 907   if (jrsSymbolicator != nil) {
 908     id (*dynamicCall)(id, SEL, pid_t) = (id (*)(id, SEL, pid_t))&objc_msgSend;
 909     symbolicator = dynamicCall(jrsSymbolicator, @selector(symbolicatorForPid:), (pid_t)jpid);
 910   }
 911   if (symbolicator != nil) {
 912     CFRetain(symbolicator); // pin symbolicator while in java heap
 913   }
 914 
 915   putSymbolicator(env, this_obj, symbolicator);
 916   if (symbolicator == nil) {
 917     mach_port_deallocate(mach_task_self(), gTask);
 918     mach_port_deallocate(mach_task_self(), tgt_exception_port);
 919     THROW_NEW_DEBUGGER_EXCEPTION("Can't attach symbolicator to the process");
 920   }
 921 
 922 JNF_COCOA_EXIT(env);
 923 }
 924 
 925 /** For core file,
 926     called from Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2 */
 927 static void fillLoadObjects(JNIEnv* env, jobject this_obj, struct ps_prochandle* ph) {
 928   int n = 0, i = 0;
 929 
 930   // add load objects
 931   n = get_num_libs(ph);
 932   for (i = 0; i < n; i++) {
 933      uintptr_t base;
 934      const char* name;
 935      jobject loadObject;
 936      jobject loadObjectList;
 937      jstring nameString;
 938 
 939      base = get_lib_base(ph, i);
 940      name = get_lib_name(ph, i);
 941      nameString = (*env)->NewStringUTF(env, name);
 942      CHECK_EXCEPTION;
 943      loadObject = (*env)->CallObjectMethod(env, this_obj, createLoadObject_ID,
 944                                             nameString, (jlong)0, (jlong)base);
 945      CHECK_EXCEPTION;
 946      loadObjectList = (*env)->GetObjectField(env, this_obj, loadObjectList_ID);
 947      CHECK_EXCEPTION;
 948      (*env)->CallBooleanMethod(env, loadObjectList, listAdd_ID, loadObject);
 949      CHECK_EXCEPTION;
 950   }
 951 }
 952 
 953 /*
 954  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 955  * Method:    attach0
 956  * Signature: (Ljava/lang/String;Ljava/lang/String;)V
 957  */
 958 JNIEXPORT void JNICALL
 959 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2(
 960   JNIEnv *env, jobject this_obj, jstring execName, jstring coreName)
 961 {
 962   const char *execName_cstr;
 963   const char *coreName_cstr;
 964   jboolean isCopy;
 965   struct ps_prochandle* ph;
 966 
 967   execName_cstr = (*env)->GetStringUTFChars(env, execName, &isCopy);
 968   CHECK_EXCEPTION;
 969   coreName_cstr = (*env)->GetStringUTFChars(env, coreName, &isCopy);
 970   if ((*env)->ExceptionOccurred(env)) {
 971     (*env)->ReleaseStringUTFChars(env, execName, execName_cstr);
 972     return;
 973   }
 974 
 975   print_debug("attach: %s %s\n", execName_cstr, coreName_cstr);
 976 
 977   if ( (ph = Pgrab_core(execName_cstr, coreName_cstr)) == NULL) {
 978     (*env)->ReleaseStringUTFChars(env, execName, execName_cstr);
 979     (*env)->ReleaseStringUTFChars(env, coreName, coreName_cstr);
 980     THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the core file");
 981   }
 982   (*env)->SetLongField(env, this_obj, p_ps_prochandle_ID, (jlong)(intptr_t)ph);
 983   (*env)->ReleaseStringUTFChars(env, execName, execName_cstr);
 984   (*env)->ReleaseStringUTFChars(env, coreName, coreName_cstr);
 985   fillLoadObjects(env, this_obj, ph);
 986 }
 987 
 988 static void detach_cleanup(task_t gTask, JNIEnv *env, jobject this_obj, bool throw_exception) {
 989   mach_port_deallocate(mach_task_self(), tgt_exception_port);
 990   mach_port_deallocate(mach_task_self(), gTask);
 991 
 992   id symbolicator = getSymbolicator(env, this_obj);
 993   if (symbolicator != nil) {
 994     CFRelease(symbolicator);
 995   }
 996   if (throw_exception) {
 997     THROW_NEW_DEBUGGER_EXCEPTION("Cannot detach.");
 998   }
 999 }
1000 
1001 /*
1002  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
1003  * Method:    detach0
1004  * Signature: ()V
1005  */
1006 JNIEXPORT void JNICALL
1007 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_detach0(
1008   JNIEnv *env, jobject this_obj)
1009 {
1010   print_debug("detach0 called\n");
1011   struct ps_prochandle* ph = get_proc_handle(env, this_obj);
1012   if (ph != NULL && ph->core != NULL) {
1013      Prelease(ph);
1014      return;
1015   }
1016 JNF_COCOA_ENTER(env);

1017 
1018   task_t gTask = getTask(env, this_obj);
1019   kern_return_t k_res = 0;
1020 
1021   // Restore the pre-saved original exception ports registered with the target process
1022   for (uint32_t i = 0; i < exception_saved_state.saved_exception_types_count; ++i) {
1023     k_res = task_set_exception_ports(gTask,
1024                                      exception_saved_state.saved_masks[i],
1025                                      exception_saved_state.saved_ports[i],
1026                                      exception_saved_state.saved_behaviors[i],
1027                                      exception_saved_state.saved_flavors[i]);
1028     if (k_res != KERN_SUCCESS) {
1029       print_error("detach: task_set_exception_ports failed with %d while "
1030                   "restoring the target exception ports.\n", k_res);
1031       detach_cleanup(gTask, env, this_obj, true);
1032     }
1033   }
1034 
1035   // detach from the ptraced process causing it to resume execution
1036   int pid;
1037   k_res = pid_for_task(gTask, &pid);
1038   if (k_res != KERN_SUCCESS) {
1039     print_error("detach: pid_for_task(%d) failed (%d)\n", pid, k_res);
1040     detach_cleanup(gTask, env, this_obj, true);
1041   }
1042   else {
1043     errno = 0;
1044     ptrace(PT_DETACH, pid, (caddr_t)1, 0);
1045     if (errno != 0) {
1046       print_error("detach: ptrace(PT_DETACH,...) failed: %s", strerror(errno));
1047       detach_cleanup(gTask, env, this_obj, true);
1048     }
1049   }
1050 
1051   // reply to the previous exception message
1052   k_res = mach_msg(&rep_msg.header,
1053                    MACH_SEND_MSG| MACH_SEND_INTERRUPT,
1054                    rep_msg.header.msgh_size,
1055                    0,
1056                    MACH_PORT_NULL,
1057                    MACH_MSG_TIMEOUT_NONE,
1058                    MACH_PORT_NULL);
1059   if (k_res != MACH_MSG_SUCCESS) {
1060     print_error("detach: mach_msg() for replying to pending exceptions failed: '%s' (%d)\n",
1061                  mach_error_string(k_res), k_res);
1062     detach_cleanup(gTask, env, this_obj, true);
1063   }
1064 
1065   detach_cleanup(gTask, env, this_obj, false);
1066 
1067 JNF_COCOA_EXIT(env);
1068 }
--- EOF ---