1 /*
   2  * Copyright (c) 2002, 2018, 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   CHECK_EXCEPTION_(0);
 247 
 248   print_debug("look for %s \n", symbolName_cstr);
 249   addr = (jlong) lookup_symbol(ph, objectName_cstr, symbolName_cstr);
 250 
 251   if (objectName_cstr != NULL) {
 252     (*env)->ReleaseStringUTFChars(env, objectName, objectName_cstr);
 253   }
 254   (*env)->ReleaseStringUTFChars(env, symbolName, symbolName_cstr);
 255   return addr;
 256 }
 257 
 258 /*
 259  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 260  * Method:    lookupByName0
 261  * Signature: (Ljava/lang/String;Ljava/lang/String;)J
 262  */
 263 JNIEXPORT jlong JNICALL
 264 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByName0(
 265   JNIEnv *env, jobject this_obj,
 266   jstring objectName, jstring symbolName)
 267 {
 268   struct ps_prochandle* ph = get_proc_handle(env, this_obj);
 269   if (ph != NULL && ph->core != NULL) {
 270     return lookupByNameIncore(env, ph, this_obj, objectName, symbolName);
 271   }
 272 
 273   jlong address = 0;
 274 
 275 JNF_COCOA_ENTER(env);
 276   NSString *symbolNameString = JNFJavaToNSString(env, symbolName);
 277 
 278   print_debug("lookupInProcess called for %s\n", [symbolNameString UTF8String]);
 279 
 280   id symbolicator = getSymbolicator(env, this_obj);
 281   if (symbolicator != nil) {
 282     uint64_t (*dynamicCall)(id, SEL, NSString *) = (uint64_t (*)(id, SEL, NSString *))&objc_msgSend;
 283     address = (jlong) dynamicCall(symbolicator, @selector(addressForSymbol:), symbolNameString);
 284   }
 285 
 286   print_debug("address of symbol %s = %llx\n", [symbolNameString UTF8String], address);
 287 JNF_COCOA_EXIT(env);
 288 
 289   return address;
 290 }
 291 
 292 /*
 293  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 294  * Method:    lookupByAddress0
 295  * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
 296  */
 297 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByAddress0
 298   (JNIEnv *env, jobject this_obj, jlong addr) {
 299   uintptr_t offset;
 300   const char* sym = NULL;
 301   jstring sym_string;
 302 
 303   struct ps_prochandle* ph = get_proc_handle(env, this_obj);
 304   if (ph != NULL && ph->core != NULL) {
 305     sym = symbol_for_pc(ph, (uintptr_t) addr, &offset);
 306     if (sym == NULL) return 0;
 307     sym_string = (*env)->NewStringUTF(env, sym);
 308     CHECK_EXCEPTION_(0);
 309     return (*env)->CallObjectMethod(env, this_obj, createClosestSymbol_ID,
 310                                                 sym_string, (jlong)offset);
 311   }
 312   return 0;
 313 }
 314 
 315 /** called from Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_readBytesFromProcess0 */
 316 jbyteArray readBytesFromCore(
 317   JNIEnv *env, struct ps_prochandle *ph, jobject this_obj, jlong addr, jlong numBytes)
 318 {
 319   jboolean isCopy;
 320   jbyteArray array;
 321   jbyte *bufPtr;
 322   ps_err_e err;
 323 
 324   array = (*env)->NewByteArray(env, numBytes);
 325   CHECK_EXCEPTION_(0);
 326   bufPtr = (*env)->GetByteArrayElements(env, array, &isCopy);
 327   CHECK_EXCEPTION_(0);
 328 
 329   err = ps_pread(ph, (psaddr_t) (uintptr_t)addr, bufPtr, numBytes);
 330   (*env)->ReleaseByteArrayElements(env, array, bufPtr, 0);
 331   return (err == PS_OK)? array : 0;
 332 }
 333 
 334 /*
 335  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 336  * Method:    readBytesFromProcess0
 337  * Signature: (JJ)Lsun/jvm/hotspot/debugger/ReadResult;
 338  */
 339 JNIEXPORT jbyteArray JNICALL
 340 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_readBytesFromProcess0(
 341   JNIEnv *env, jobject this_obj,
 342   jlong addr, jlong numBytes)
 343 {
 344   print_debug("readBytesFromProcess called. addr = %llx numBytes = %lld\n", addr, numBytes);
 345 
 346   // must allocate storage instead of using former parameter buf
 347   jbyteArray array;
 348 
 349   struct ps_prochandle* ph = get_proc_handle(env, this_obj);
 350   if (ph != NULL && ph->core != NULL) {
 351     return readBytesFromCore(env, ph, this_obj, addr, numBytes);
 352   }
 353 
 354   array = (*env)->NewByteArray(env, numBytes);
 355   CHECK_EXCEPTION_(0);
 356 
 357   unsigned long alignedAddress;
 358   unsigned long alignedLength = 0;
 359   kern_return_t result;
 360   vm_offset_t *pages;
 361   int *mapped;
 362   long pageCount;
 363   uint byteCount;
 364   int i;
 365   unsigned long remaining;
 366 
 367   alignedAddress = trunc_page(addr);
 368   if (addr != alignedAddress) {
 369     alignedLength += addr - alignedAddress;
 370   }
 371   alignedLength = round_page(numBytes);
 372   pageCount = alignedLength/vm_page_size;
 373 
 374   // Allocate storage for pages and flags.
 375   pages = malloc(pageCount * sizeof(vm_offset_t));
 376   mapped = calloc(pageCount, sizeof(int));
 377 
 378   task_t gTask = getTask(env, this_obj);
 379   // Try to read each of the pages.
 380   for (i = 0; i < pageCount; i++) {
 381     result = vm_read(gTask, alignedAddress + i*vm_page_size, vm_page_size,
 382                      &pages[i], &byteCount);
 383     mapped[i] = (result == KERN_SUCCESS);
 384     // assume all failures are unmapped pages
 385   }
 386 
 387   print_debug("%ld pages\n", pageCount);
 388 
 389   remaining = numBytes;
 390 
 391   for (i = 0; i < pageCount; i++) {
 392     unsigned long len = vm_page_size;
 393     unsigned long start = 0;
 394 
 395     if (i == 0) {
 396       start = addr - alignedAddress;
 397       len = vm_page_size - start;
 398     }
 399 
 400     if (i == (pageCount - 1)) {
 401       len = remaining;
 402     }
 403 
 404     if (mapped[i]) {
 405       print_debug("page %d mapped (len %ld start %ld)\n", i, len, start);
 406       (*env)->SetByteArrayRegion(env, array, 0, len, ((jbyte *) pages[i] + start));
 407       vm_deallocate(mach_task_self(), pages[i], vm_page_size);
 408     }
 409 
 410     remaining -= len;
 411   }
 412 
 413   free (pages);
 414   free (mapped);
 415   return array;
 416 }
 417 
 418 /** Only used for core file reading, set thread_id for threads which is got after core file parsed.
 419   * Thread context is available in Mach-O core file but thread id is not. We can get thread id
 420   * from Threads which store all java threads information when they are created. Here we can identify
 421   * them as java threads by checking if a thread's rsp or rbp within a java thread's stack.
 422   * Note Macosx uses unique_thread_id which is different from other platforms though printed ids
 423   * are still pthread id. Function BsdDebuggerLocal.getJavaThreadsInfo returns an array of long
 424   * integers to host all java threads' id, stack_start, stack_end as:
 425   * [uid0, stack_start0, stack_end0, uid1, stack_start1, stack_end1, ...]
 426   *
 427   * The work cannot be done at init0 since Threads is not available yet(VM not initialized yet).
 428   * This function should be called only once if succeeded
 429   */
 430 bool fill_java_threads(JNIEnv* env, jobject this_obj, struct ps_prochandle* ph) {
 431   int n = 0, i = 0, j;
 432   struct reg regs;
 433 
 434   jlongArray thrinfos = (*env)->CallObjectMethod(env, this_obj, getJavaThreadsInfo_ID);
 435   CHECK_EXCEPTION_(false);
 436   int len = (int)(*env)->GetArrayLength(env, thrinfos);
 437   uint64_t* cinfos = (uint64_t *)(*env)->GetLongArrayElements(env, thrinfos, NULL);
 438   CHECK_EXCEPTION_(false);
 439   n = get_num_threads(ph);
 440   print_debug("fill_java_threads called, num_of_thread = %d\n", n);
 441   for (i = 0; i < n; i++) {
 442     if (!get_nth_lwp_regs(ph, i, &regs)) {
 443       print_debug("Could not get regs of thread %d, already set!\n", i);
 444       return false;
 445     }
 446     for (j = 0; j < len; j += 3) {
 447       lwpid_t  uid = cinfos[j];
 448       uint64_t beg = cinfos[j + 1];
 449       uint64_t end = cinfos[j + 2];
 450       if ((regs.r_rsp < end && regs.r_rsp >= beg) ||
 451           (regs.r_rbp < end && regs.r_rbp >= beg)) {
 452         set_lwp_id(ph, i, uid);
 453         break;
 454       }
 455     }
 456   }
 457   (*env)->ReleaseLongArrayElements(env, thrinfos, (jlong*)cinfos, 0);
 458   CHECK_EXCEPTION_(false);
 459   return true;
 460 }
 461 
 462 /* For core file only, called from
 463  * Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getThreadIntegerRegisterSet0
 464  */
 465 jlongArray getThreadIntegerRegisterSetFromCore(JNIEnv *env, jobject this_obj, long lwp_id, struct ps_prochandle* ph) {
 466   if (!_threads_filled)  {
 467     if (!fill_java_threads(env, this_obj, ph)) {
 468       throw_new_debugger_exception(env, "Failed to fill in threads");
 469       return 0;
 470     } else {
 471       _threads_filled = true;
 472     }
 473   }
 474 
 475   struct reg gregs;
 476   jboolean isCopy;
 477   jlongArray array;
 478   jlong *regs;
 479 
 480   if (get_lwp_regs(ph, lwp_id, &gregs) != true) {
 481     THROW_NEW_DEBUGGER_EXCEPTION_("get_thread_regs failed for a lwp", 0);
 482   }
 483 
 484 #undef NPRGREG
 485 #undef REG_INDEX
 486 #if amd64
 487 #define NPRGREG sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_NPRGREG
 488 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_##reg
 489 
 490   array = (*env)->NewLongArray(env, NPRGREG);
 491   CHECK_EXCEPTION_(0);
 492   regs = (*env)->GetLongArrayElements(env, array, &isCopy);
 493 
 494   regs[REG_INDEX(R15)] = gregs.r_r15;
 495   regs[REG_INDEX(R14)] = gregs.r_r14;
 496   regs[REG_INDEX(R13)] = gregs.r_r13;
 497   regs[REG_INDEX(R12)] = gregs.r_r12;
 498   regs[REG_INDEX(RBP)] = gregs.r_rbp;
 499   regs[REG_INDEX(RBX)] = gregs.r_rbx;
 500   regs[REG_INDEX(R11)] = gregs.r_r11;
 501   regs[REG_INDEX(R10)] = gregs.r_r10;
 502   regs[REG_INDEX(R9)]  = gregs.r_r9;
 503   regs[REG_INDEX(R8)]  = gregs.r_r8;
 504   regs[REG_INDEX(RAX)] = gregs.r_rax;
 505   regs[REG_INDEX(RCX)] = gregs.r_rcx;
 506   regs[REG_INDEX(RDX)] = gregs.r_rdx;
 507   regs[REG_INDEX(RSI)] = gregs.r_rsi;
 508   regs[REG_INDEX(RDI)] = gregs.r_rdi;
 509   regs[REG_INDEX(RIP)] = gregs.r_rip;
 510   regs[REG_INDEX(CS)]  = gregs.r_cs;
 511   regs[REG_INDEX(RSP)] = gregs.r_rsp;
 512   regs[REG_INDEX(SS)]  = gregs.r_ss;
 513   regs[REG_INDEX(FSBASE)] = 0;
 514   regs[REG_INDEX(GSBASE)] = 0;
 515   regs[REG_INDEX(DS)] = gregs.r_ds;
 516   regs[REG_INDEX(ES)] = gregs.r_es;
 517   regs[REG_INDEX(FS)] = gregs.r_fs;
 518   regs[REG_INDEX(GS)] = gregs.r_gs;
 519   regs[REG_INDEX(TRAPNO)] = gregs.r_trapno;
 520   regs[REG_INDEX(RFL)]    = gregs.r_rflags;
 521 
 522 #endif /* amd64 */
 523   (*env)->ReleaseLongArrayElements(env, array, regs, JNI_COMMIT);
 524   return array;
 525 }
 526 
 527 /*
 528  * Lookup the thread_t that corresponds to the given thread_id.
 529  * The thread_id should be the result from calling thread_info() with THREAD_IDENTIFIER_INFO
 530  * and reading the m_ident_info.thread_id returned.
 531  * The returned thread_t is the mach send right to the kernel port for the corresponding thread.
 532  *
 533  * We cannot simply use the OSThread._thread_id field in the JVM. This is set to ::mach_thread_self()
 534  * in the VM, but that thread port is not valid for a remote debugger to access the thread.
 535  */
 536 thread_t
 537 lookupThreadFromThreadId(task_t task, jlong thread_id) {
 538   print_debug("lookupThreadFromThreadId thread_id=0x%llx\n", thread_id);
 539 
 540   thread_array_t thread_list = NULL;
 541   mach_msg_type_number_t thread_list_count = 0;
 542   thread_t result_thread = 0;
 543   int i;
 544 
 545   // get the list of all the send rights
 546   kern_return_t result = task_threads(task, &thread_list, &thread_list_count);
 547   if (result != KERN_SUCCESS) {
 548     print_debug("task_threads returned 0x%x\n", result);
 549     return 0;
 550   }
 551 
 552   for(i = 0 ; i < thread_list_count; i++) {
 553     thread_identifier_info_data_t m_ident_info;
 554     mach_msg_type_number_t count = THREAD_IDENTIFIER_INFO_COUNT;
 555 
 556     // get the THREAD_IDENTIFIER_INFO for the send right
 557     result = thread_info(thread_list[i], THREAD_IDENTIFIER_INFO, (thread_info_t) &m_ident_info, &count);
 558     if (result != KERN_SUCCESS) {
 559       print_debug("thread_info returned 0x%x\n", result);
 560       break;
 561     }
 562 
 563     // if this is the one we're looking for, return the send right
 564     if (thread_id == m_ident_info.thread_id)
 565     {
 566       result_thread = thread_list[i];
 567       break;
 568     }
 569   }
 570 
 571   vm_size_t thread_list_size = (vm_size_t) (thread_list_count * sizeof (thread_t));
 572   vm_deallocate(mach_task_self(), (vm_address_t) thread_list, thread_list_count);
 573 
 574   return result_thread;
 575 }
 576 
 577 
 578 /*
 579  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 580  * Method:    getThreadIntegerRegisterSet0
 581  * Signature: (J)[J
 582  */
 583 JNIEXPORT jlongArray JNICALL
 584 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getThreadIntegerRegisterSet0(
 585   JNIEnv *env, jobject this_obj,
 586   jlong thread_id)
 587 {
 588   print_debug("getThreadRegisterSet0 called\n");
 589 
 590   struct ps_prochandle* ph = get_proc_handle(env, this_obj);
 591   if (ph != NULL && ph->core != NULL) {
 592     return getThreadIntegerRegisterSetFromCore(env, this_obj, thread_id, ph);
 593   }
 594 
 595   kern_return_t result;
 596   thread_t tid;
 597   mach_msg_type_number_t count = HSDB_THREAD_STATE_COUNT;
 598   hsdb_thread_state_t state;
 599   jlongArray registerArray;
 600   jlong *primitiveArray;
 601   task_t gTask = getTask(env, this_obj);
 602 
 603   tid = lookupThreadFromThreadId(gTask, thread_id);
 604 
 605   result = thread_get_state(tid, HSDB_THREAD_STATE, (thread_state_t)&state, &count);
 606 
 607   if (result != KERN_SUCCESS) {
 608     print_error("getregs: thread_get_state(%d) failed (%d)\n", tid, result);
 609     return NULL;
 610   }
 611 
 612 #if amd64
 613 #define NPRGREG sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_NPRGREG
 614 #undef REG_INDEX
 615 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_##reg
 616 
 617   // 64 bit
 618   print_debug("Getting threads for a 64-bit process\n");
 619   registerArray = (*env)->NewLongArray(env, NPRGREG);
 620   CHECK_EXCEPTION_(0);
 621   primitiveArray = (*env)->GetLongArrayElements(env, registerArray, NULL);
 622 
 623   primitiveArray[REG_INDEX(R15)] = state.__r15;
 624   primitiveArray[REG_INDEX(R14)] = state.__r14;
 625   primitiveArray[REG_INDEX(R13)] = state.__r13;
 626   primitiveArray[REG_INDEX(R12)] = state.__r12;
 627   primitiveArray[REG_INDEX(R11)] = state.__r11;
 628   primitiveArray[REG_INDEX(R10)] = state.__r10;
 629   primitiveArray[REG_INDEX(R9)]  = state.__r9;
 630   primitiveArray[REG_INDEX(R8)]  = state.__r8;
 631   primitiveArray[REG_INDEX(RDI)] = state.__rdi;
 632   primitiveArray[REG_INDEX(RSI)] = state.__rsi;
 633   primitiveArray[REG_INDEX(RBP)] = state.__rbp;
 634   primitiveArray[REG_INDEX(RBX)] = state.__rbx;
 635   primitiveArray[REG_INDEX(RDX)] = state.__rdx;
 636   primitiveArray[REG_INDEX(RCX)] = state.__rcx;
 637   primitiveArray[REG_INDEX(RAX)] = state.__rax;
 638   primitiveArray[REG_INDEX(TRAPNO)] = 0;            // trapno, not used
 639   primitiveArray[REG_INDEX(ERR)]    = 0;            // err, not used
 640   primitiveArray[REG_INDEX(RIP)] = state.__rip;
 641   primitiveArray[REG_INDEX(CS)]  = state.__cs;
 642   primitiveArray[REG_INDEX(RFL)] = state.__rflags;
 643   primitiveArray[REG_INDEX(RSP)] = state.__rsp;
 644   primitiveArray[REG_INDEX(SS)] = 0;                // We don't have SS
 645   primitiveArray[REG_INDEX(FS)] = state.__fs;
 646   primitiveArray[REG_INDEX(GS)] = state.__gs;
 647   primitiveArray[REG_INDEX(ES)] = 0;
 648   primitiveArray[REG_INDEX(DS)] = 0;
 649   primitiveArray[REG_INDEX(FSBASE)] = 0;
 650   primitiveArray[REG_INDEX(GSBASE)] = 0;
 651   print_debug("set registers\n");
 652 
 653   (*env)->ReleaseLongArrayElements(env, registerArray, primitiveArray, 0);
 654 
 655 #else
 656 #error UNSUPPORTED_ARCH
 657 #endif /* amd64 */
 658 
 659   return registerArray;
 660 }
 661 
 662 /*
 663  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 664  * Method:    translateTID0
 665  * Signature: (I)I
 666  */
 667 JNIEXPORT jint JNICALL
 668 Java_sun_jvm_hotspot_debugger_macosx_MacOSXDebuggerLocal_translateTID0(
 669   JNIEnv *env, jobject this_obj, jint tid) 
 670 {
 671   print_debug("translateTID0 called on tid = 0x%x\n", (int)tid);
 672 
 673   kern_return_t result;
 674   thread_t foreign_tid, usable_tid;
 675   mach_msg_type_name_t type;
 676   
 677   foreign_tid = tid;
 678     
 679   task_t gTask = getTask(env, this_obj);
 680   result = mach_port_extract_right(gTask, foreign_tid, 
 681                                    MACH_MSG_TYPE_COPY_SEND, 
 682                                    &usable_tid, &type);
 683   if (result != KERN_SUCCESS)
 684     return -1;
 685     
 686   print_debug("translateTID0: 0x%x -> 0x%x\n", foreign_tid, usable_tid);
 687     
 688   return (jint) usable_tid;
 689 }
 690 
 691 // attach to a process/thread specified by "pid"
 692 static bool ptrace_attach(pid_t pid) {
 693   errno = 0;
 694   ptrace(PT_ATTACHEXC, pid, 0, 0);
 695 
 696   if (errno != 0) {
 697     print_error("ptrace_attach: ptrace(PT_ATTACHEXC,...) failed: %s", strerror(errno));
 698     return false;
 699   }
 700   return true;
 701 }
 702 
 703 kern_return_t catch_mach_exception_raise(
 704   mach_port_t exception_port, mach_port_t thread_port, mach_port_t task_port,
 705   exception_type_t exception_type, mach_exception_data_t codes,
 706   mach_msg_type_number_t num_codes) {
 707 
 708   print_debug("catch_mach_exception_raise: Exception port = %d thread_port = %d "
 709               "task port %d exc type = %d num_codes %d\n",
 710               exception_port, thread_port, task_port, exception_type, num_codes);
 711 
 712   // This message should denote a Unix soft signal, with
 713   // 1. the exception type = EXC_SOFTWARE
 714   // 2. codes[0] (which is the code) = EXC_SOFT_SIGNAL
 715   // 3. codes[1] (which is the sub-code) = SIGSTOP
 716   if (!(exception_type == EXC_SOFTWARE &&
 717         codes[0] == EXC_SOFT_SIGNAL    &&
 718         codes[num_codes -1] == SIGSTOP)) {
 719     print_error("catch_mach_exception_raise: Message doesn't denote a Unix "
 720                 "soft signal. exception_type = %d, codes[0] = %d, "
 721                 "codes[num_codes -1] = %d, num_codes = %d\n",
 722                 exception_type, codes[0], codes[num_codes - 1], num_codes);
 723     return MACH_RCV_INVALID_TYPE;
 724   }
 725   return KERN_SUCCESS;
 726 }
 727 
 728 kern_return_t catch_mach_exception_raise_state(
 729   mach_port_t exception_port, exception_type_t exception, const mach_exception_data_t code,
 730   mach_msg_type_number_t code_cnt, int *flavor, const thread_state_t old_state,
 731   mach_msg_type_number_t old_state_cnt, thread_state_t new_state,
 732   mach_msg_type_number_t *new_state_cnt) {
 733   return MACH_RCV_INVALID_TYPE;
 734 }
 735 
 736 
 737 kern_return_t catch_mach_exception_raise_state_identity(
 738   mach_port_t exception_port, mach_port_t thread, mach_port_t task,
 739   exception_type_t exception, mach_exception_data_t code,
 740   mach_msg_type_number_t code_cnt, int *flavor,
 741   thread_state_t old_state, mach_msg_type_number_t old_state_cnt,
 742   thread_state_t new_state, mach_msg_type_number_t *new_state_cnt) {
 743   return MACH_RCV_INVALID_TYPE;
 744 }
 745 
 746 // wait to receive an exception message
 747 static bool wait_for_exception() {
 748   kern_return_t result;
 749 
 750   result = mach_msg(&exc_msg.header,
 751                     MACH_RCV_MSG,
 752                     0,
 753                     sizeof(exc_msg),
 754                     tgt_exception_port,
 755                     MACH_MSG_TIMEOUT_NONE,
 756                     MACH_PORT_NULL);
 757 
 758   if (result != MACH_MSG_SUCCESS) {
 759     print_error("attach: wait_for_exception: mach_msg() failed: '%s' (%d)\n",
 760                 mach_error_string(result), result);
 761     return false;
 762   }
 763 
 764   if (mach_exc_server(&exc_msg.header, &rep_msg.header) == false ||
 765       rep_msg.ret_code != KERN_SUCCESS) {
 766     print_error("attach: wait_for_exception: mach_exc_server failure\n");
 767     if (rep_msg.ret_code != KERN_SUCCESS) {
 768       print_error("catch_mach_exception_raise() failed '%s' (%d)\n",
 769                   mach_error_string(rep_msg.ret_code), rep_msg.ret_code);
 770     }
 771     return false;
 772   }
 773 
 774   print_debug("reply msg from mach_exc_server: (msg->{bits = %#x, size = %u, "
 775               "remote_port = %#x, local_port = %#x, reserved = 0x%x, id = 0x%x},)",
 776               rep_msg.header.msgh_bits, rep_msg.header.msgh_size,
 777               rep_msg.header.msgh_remote_port, rep_msg.header.msgh_local_port,
 778               rep_msg.header.msgh_reserved, rep_msg.header.msgh_id);
 779 
 780   return true;
 781 }
 782 
 783 /*
 784  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 785  * Method:    attach0
 786  * Signature: (I)V
 787  */
 788 JNIEXPORT void JNICALL
 789 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__I(
 790   JNIEnv *env, jobject this_obj, jint jpid)
 791 {
 792   print_debug("attach0 called for jpid=%d\n", (int)jpid);
 793 
 794 JNF_COCOA_ENTER(env);
 795 
 796   kern_return_t result;
 797   task_t gTask = 0;
 798 
 799   result = task_for_pid(mach_task_self(), jpid, &gTask);
 800   if (result != KERN_SUCCESS) {
 801     print_error("attach: task_for_pid(%d) failed: '%s' (%d)\n", (int)jpid, mach_error_string(result), result);
 802     THROW_NEW_DEBUGGER_EXCEPTION(
 803       "Can't attach to the process. Could be caused by an incorrect pid or lack of privileges.");
 804   }
 805   putTask(env, this_obj, gTask);
 806 
 807   // Allocate an exception port.
 808   result = mach_port_allocate(mach_task_self(),
 809                               MACH_PORT_RIGHT_RECEIVE,
 810                               &tgt_exception_port);
 811   if (result != KERN_SUCCESS) {
 812     print_error("attach: mach_port_allocate() for tgt_exception_port failed: '%s' (%d)\n",
 813                 mach_error_string(result), result);
 814     THROW_NEW_DEBUGGER_EXCEPTION(
 815       "Can't attach to the process. Couldn't allocate an exception port.");
 816   }
 817 
 818   // Enable the new exception port to send messages.
 819   result = mach_port_insert_right (mach_task_self(),
 820                                    tgt_exception_port,
 821                                    tgt_exception_port,
 822                                    MACH_MSG_TYPE_MAKE_SEND);
 823   if (result != KERN_SUCCESS) {
 824     print_error("attach: mach_port_insert_right() failed for port 0x%x: '%s' (%d)\n",
 825                 tgt_exception_port, mach_error_string(result), result);
 826     THROW_NEW_DEBUGGER_EXCEPTION(
 827       "Can't attach to the process. Couldn't add send privileges to the exception port.");
 828   }
 829 
 830   // Save the existing original exception ports registered with the target
 831   // process (for later restoration while detaching from the process).
 832   result = task_get_exception_ports(gTask,
 833                                     EXC_MASK_ALL,
 834                                     exception_saved_state.saved_masks,
 835                                     &exception_saved_state.saved_exception_types_count,
 836                                     exception_saved_state.saved_ports,
 837                                     exception_saved_state.saved_behaviors,
 838                                     exception_saved_state.saved_flavors);
 839 
 840   if (result != KERN_SUCCESS) {
 841     print_error("attach: task_get_exception_ports() failed: '%s' (%d)\n",
 842                 mach_error_string(result), result);
 843     THROW_NEW_DEBUGGER_EXCEPTION(
 844       "Can't attach to the process. Could not get the target exception ports.");
 845   }
 846 
 847   // register the exception port to be used for all future exceptions with the
 848   // target process.
 849   result = task_set_exception_ports(gTask,
 850                                     EXC_MASK_ALL,
 851                                     tgt_exception_port,
 852                                     EXCEPTION_DEFAULT | MACH_EXCEPTION_CODES,
 853                                     THREAD_STATE_NONE);
 854 
 855   if (result != KERN_SUCCESS) {
 856     print_error("attach: task_set_exception_ports() failed -- port 0x%x: '%s' (%d)\n",
 857                 tgt_exception_port, mach_error_string(result), result);
 858     mach_port_deallocate(mach_task_self(), gTask);
 859     mach_port_deallocate(mach_task_self(), tgt_exception_port);
 860     THROW_NEW_DEBUGGER_EXCEPTION(
 861       "Can't attach to the process. Could not register the exception port "
 862       "with the target process.");
 863   }
 864 
 865   // use ptrace to stop the process
 866   // on os x, ptrace only needs to be called on the process, not the individual threads
 867   if (ptrace_attach(jpid) != true) {
 868     print_error("attach: ptrace failure in attaching to %d\n", (int)jpid);
 869     mach_port_deallocate(mach_task_self(), gTask);
 870     mach_port_deallocate(mach_task_self(), tgt_exception_port);
 871     THROW_NEW_DEBUGGER_EXCEPTION("Can't ptrace attach to the process");
 872   }
 873 
 874   if (wait_for_exception() != true) {
 875     mach_port_deallocate(mach_task_self(), gTask);
 876     mach_port_deallocate(mach_task_self(), tgt_exception_port);
 877     THROW_NEW_DEBUGGER_EXCEPTION(
 878       "Can't attach to the process. Issues with reception of the exception message.");
 879   }
 880 
 881   // suspend all the threads in the task
 882   result = task_suspend(gTask);
 883   if (result != KERN_SUCCESS) {
 884     print_error("attach: task_suspend() failed: '%s' (%d)\n",
 885                 mach_error_string(result), result);
 886     mach_port_deallocate(mach_task_self(), gTask);
 887     mach_port_deallocate(mach_task_self(), tgt_exception_port);
 888     THROW_NEW_DEBUGGER_EXCEPTION("Can't attach. Unable to suspend all the threads in the task.");
 889   }
 890 
 891   id symbolicator = nil;
 892   id jrsSymbolicator = objc_lookUpClass("JRSSymbolicator");
 893   if (jrsSymbolicator != nil) {
 894     id (*dynamicCall)(id, SEL, pid_t) = (id (*)(id, SEL, pid_t))&objc_msgSend;
 895     symbolicator = dynamicCall(jrsSymbolicator, @selector(symbolicatorForPid:), (pid_t)jpid);
 896   }
 897   if (symbolicator != nil) {
 898     CFRetain(symbolicator); // pin symbolicator while in java heap
 899   }
 900 
 901   putSymbolicator(env, this_obj, symbolicator);
 902   if (symbolicator == nil) {
 903     mach_port_deallocate(mach_task_self(), gTask);
 904     mach_port_deallocate(mach_task_self(), tgt_exception_port);
 905     THROW_NEW_DEBUGGER_EXCEPTION("Can't attach symbolicator to the process");
 906   }
 907 
 908 JNF_COCOA_EXIT(env);
 909 }
 910 
 911 /** For core file,
 912     called from Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2 */
 913 static void fillLoadObjects(JNIEnv* env, jobject this_obj, struct ps_prochandle* ph) {
 914   int n = 0, i = 0;
 915 
 916   // add load objects
 917   n = get_num_libs(ph);
 918   for (i = 0; i < n; i++) {
 919      uintptr_t base;
 920      const char* name;
 921      jobject loadObject;
 922      jobject loadObjectList;
 923      jstring nameString;
 924 
 925      base = get_lib_base(ph, i);
 926      name = get_lib_name(ph, i);
 927      nameString = (*env)->NewStringUTF(env, name);
 928      CHECK_EXCEPTION;
 929      loadObject = (*env)->CallObjectMethod(env, this_obj, createLoadObject_ID,
 930                                             nameString, (jlong)0, (jlong)base);
 931      CHECK_EXCEPTION;
 932      loadObjectList = (*env)->GetObjectField(env, this_obj, loadObjectList_ID);
 933      CHECK_EXCEPTION;
 934      (*env)->CallBooleanMethod(env, loadObjectList, listAdd_ID, loadObject);
 935      CHECK_EXCEPTION;
 936   }
 937 }
 938 
 939 /*
 940  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 941  * Method:    attach0
 942  * Signature: (Ljava/lang/String;Ljava/lang/String;)V
 943  */
 944 JNIEXPORT void JNICALL
 945 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2(
 946   JNIEnv *env, jobject this_obj, jstring execName, jstring coreName)
 947 {
 948   const char *execName_cstr;
 949   const char *coreName_cstr;
 950   jboolean isCopy;
 951   struct ps_prochandle* ph;
 952 
 953   execName_cstr = (*env)->GetStringUTFChars(env, execName, &isCopy);
 954   CHECK_EXCEPTION;
 955   coreName_cstr = (*env)->GetStringUTFChars(env, coreName, &isCopy);
 956   CHECK_EXCEPTION;
 957 
 958   print_debug("attach: %s %s\n", execName_cstr, coreName_cstr);
 959 
 960   if ( (ph = Pgrab_core(execName_cstr, coreName_cstr)) == NULL) {
 961     (*env)->ReleaseStringUTFChars(env, execName, execName_cstr);
 962     (*env)->ReleaseStringUTFChars(env, coreName, coreName_cstr);
 963     THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the core file");
 964   }
 965   (*env)->SetLongField(env, this_obj, p_ps_prochandle_ID, (jlong)(intptr_t)ph);
 966   (*env)->ReleaseStringUTFChars(env, execName, execName_cstr);
 967   (*env)->ReleaseStringUTFChars(env, coreName, coreName_cstr);
 968   fillLoadObjects(env, this_obj, ph);
 969 }
 970 
 971 static void detach_cleanup(task_t gTask, JNIEnv *env, jobject this_obj, bool throw_exception) {
 972   mach_port_deallocate(mach_task_self(), tgt_exception_port);
 973   mach_port_deallocate(mach_task_self(), gTask);
 974 
 975   id symbolicator = getSymbolicator(env, this_obj);
 976   if (symbolicator != nil) {
 977     CFRelease(symbolicator);
 978   }
 979   if (throw_exception) {
 980     THROW_NEW_DEBUGGER_EXCEPTION("Cannot detach.");
 981   }
 982 }
 983 
 984 /*
 985  * Class:     sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
 986  * Method:    detach0
 987  * Signature: ()V
 988  */
 989 JNIEXPORT void JNICALL
 990 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_detach0(
 991   JNIEnv *env, jobject this_obj)
 992 {
 993   print_debug("detach0 called\n");
 994   struct ps_prochandle* ph = get_proc_handle(env, this_obj);
 995   if (ph != NULL && ph->core != NULL) {
 996      Prelease(ph);
 997      return;
 998   }
 999 JNF_COCOA_ENTER(env);
1000 
1001   task_t gTask = getTask(env, this_obj);
1002   kern_return_t k_res = 0;
1003 
1004   // Restore the pre-saved original exception ports registered with the target process
1005   for (uint32_t i = 0; i < exception_saved_state.saved_exception_types_count; ++i) {
1006     k_res = task_set_exception_ports(gTask,
1007                                      exception_saved_state.saved_masks[i],
1008                                      exception_saved_state.saved_ports[i],
1009                                      exception_saved_state.saved_behaviors[i],
1010                                      exception_saved_state.saved_flavors[i]);
1011     if (k_res != KERN_SUCCESS) {
1012       print_error("detach: task_set_exception_ports failed with %d while "
1013                   "restoring the target exception ports.\n", k_res);
1014       detach_cleanup(gTask, env, this_obj, true);
1015     }
1016   }
1017 
1018   // detach from the ptraced process causing it to resume execution
1019   int pid;
1020   k_res = pid_for_task(gTask, &pid);
1021   if (k_res != KERN_SUCCESS) {
1022     print_error("detach: pid_for_task(%d) failed (%d)\n", pid, k_res);
1023     detach_cleanup(gTask, env, this_obj, true);
1024   }
1025   else {
1026     errno = 0;
1027     ptrace(PT_DETACH, pid, (caddr_t)1, 0);
1028     if (errno != 0) {
1029       print_error("detach: ptrace(PT_DETACH,...) failed: %s", strerror(errno));
1030       detach_cleanup(gTask, env, this_obj, true);
1031     }
1032   }
1033 
1034   // reply to the previous exception message
1035   k_res = mach_msg(&rep_msg.header,
1036                    MACH_SEND_MSG| MACH_SEND_INTERRUPT,
1037                    rep_msg.header.msgh_size,
1038                    0,
1039                    MACH_PORT_NULL,
1040                    MACH_MSG_TIMEOUT_NONE,
1041                    MACH_PORT_NULL);
1042   if (k_res != MACH_MSG_SUCCESS) {
1043     print_error("detach: mach_msg() for replying to pending exceptions failed: '%s' (%d)\n",
1044                  mach_error_string(k_res), k_res);
1045     detach_cleanup(gTask, env, this_obj, true);
1046   }
1047 
1048   detach_cleanup(gTask, env, this_obj, false);
1049 
1050 JNF_COCOA_EXIT(env);
1051 }