Mercurial > hg > graal-compiler
view agent/src/os/bsd/MacosxDebuggerLocal.m @ 21643:2081f8f294fe
Fixed some javadoc
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
---|---|
date | Mon, 01 Jun 2015 11:49:57 -0700 |
parents | f2294a37e723 |
children |
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/* * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include <objc/objc-runtime.h> #import <Foundation/Foundation.h> #import <JavaNativeFoundation/JavaNativeFoundation.h> #include <JavaVM/jni.h> #import <mach/mach.h> #import <mach/mach_types.h> #import <sys/sysctl.h> #import <stdio.h> #import <stdarg.h> #import <stdlib.h> #import <strings.h> #import <dlfcn.h> #import <limits.h> #import <errno.h> #import <sys/types.h> #import <sys/ptrace.h> #include "libproc_impl.h" #define UNSUPPORTED_ARCH "Unsupported architecture!" #if defined(x86_64) && !defined(amd64) #define amd64 1 #endif #if amd64 #include "sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext.h" #else #error UNSUPPORTED_ARCH #endif static jfieldID symbolicatorID = 0; // set in _init0 static jfieldID taskID = 0; // set in _init0 static jfieldID p_ps_prochandle_ID = 0; static jfieldID loadObjectList_ID = 0; static jmethodID listAdd_ID = 0; static jmethodID createClosestSymbol_ID = 0; static jmethodID createLoadObject_ID = 0; static jmethodID getJavaThreadsInfo_ID = 0; // indicator if thread id (lwpid_t) was set static bool _threads_filled = false; static void putSymbolicator(JNIEnv *env, jobject this_obj, id symbolicator) { (*env)->SetLongField(env, this_obj, symbolicatorID, (jlong)(intptr_t)symbolicator); } static id getSymbolicator(JNIEnv *env, jobject this_obj) { jlong ptr = (*env)->GetLongField(env, this_obj, symbolicatorID); return (id)(intptr_t)ptr; } static void putTask(JNIEnv *env, jobject this_obj, task_t task) { (*env)->SetLongField(env, this_obj, taskID, (jlong)task); } static task_t getTask(JNIEnv *env, jobject this_obj) { jlong ptr = (*env)->GetLongField(env, this_obj, taskID); return (task_t)ptr; } #define CHECK_EXCEPTION_(value) if ((*env)->ExceptionOccurred(env)) { return value; } #define CHECK_EXCEPTION if ((*env)->ExceptionOccurred(env)) { return;} #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throw_new_debugger_exception(env, str); return value; } #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throw_new_debugger_exception(env, str); return;} #define CHECK_EXCEPTION_CLEAR if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); } #define CHECK_EXCEPTION_CLEAR_VOID if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); return; } #define CHECK_EXCEPTION_CLEAR_(value) if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); return value; } static void throw_new_debugger_exception(JNIEnv* env, const char* errMsg) { jclass exceptionClass = (*env)->FindClass(env, "sun/jvm/hotspot/debugger/DebuggerException"); CHECK_EXCEPTION; (*env)->ThrowNew(env, exceptionClass, errMsg); } static struct ps_prochandle* get_proc_handle(JNIEnv* env, jobject this_obj) { jlong ptr = (*env)->GetLongField(env, this_obj, p_ps_prochandle_ID); return (struct ps_prochandle*)(intptr_t)ptr; } #if defined(__i386__) #define hsdb_thread_state_t x86_thread_state32_t #define hsdb_float_state_t x86_float_state32_t #define HSDB_THREAD_STATE x86_THREAD_STATE32 #define HSDB_FLOAT_STATE x86_FLOAT_STATE32 #define HSDB_THREAD_STATE_COUNT x86_THREAD_STATE32_COUNT #define HSDB_FLOAT_STATE_COUNT x86_FLOAT_STATE32_COUNT #elif defined(__x86_64__) #define hsdb_thread_state_t x86_thread_state64_t #define hsdb_float_state_t x86_float_state64_t #define HSDB_THREAD_STATE x86_THREAD_STATE64 #define HSDB_FLOAT_STATE x86_FLOAT_STATE64 #define HSDB_THREAD_STATE_COUNT x86_THREAD_STATE64_COUNT #define HSDB_FLOAT_STATE_COUNT x86_FLOAT_STATE64_COUNT #else #error UNSUPPORTED_ARCH #endif /* * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal * Method: init0 * Signature: ()V */ JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_init0(JNIEnv *env, jclass cls) { symbolicatorID = (*env)->GetFieldID(env, cls, "symbolicator", "J"); CHECK_EXCEPTION; taskID = (*env)->GetFieldID(env, cls, "task", "J"); CHECK_EXCEPTION; // for core file p_ps_prochandle_ID = (*env)->GetFieldID(env, cls, "p_ps_prochandle", "J"); CHECK_EXCEPTION; loadObjectList_ID = (*env)->GetFieldID(env, cls, "loadObjectList", "Ljava/util/List;"); CHECK_EXCEPTION; // methods we use createClosestSymbol_ID = (*env)->GetMethodID(env, cls, "createClosestSymbol", "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;"); CHECK_EXCEPTION; createLoadObject_ID = (*env)->GetMethodID(env, cls, "createLoadObject", "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;"); CHECK_EXCEPTION; // java.util.List method we call jclass listClass = (*env)->FindClass(env, "java/util/List"); CHECK_EXCEPTION; listAdd_ID = (*env)->GetMethodID(env, listClass, "add", "(Ljava/lang/Object;)Z"); CHECK_EXCEPTION; getJavaThreadsInfo_ID = (*env)->GetMethodID(env, cls, "getJavaThreadsInfo", "()[J"); CHECK_EXCEPTION; init_libproc(getenv("LIBSAPROC_DEBUG") != NULL); } JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getAddressSize (JNIEnv *env, jclass cls) { #ifdef _LP64 return 8; #else #error UNSUPPORTED_ARCH #endif } /** called by Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByName0 */ jlong lookupByNameIncore( JNIEnv *env, struct ps_prochandle *ph, jobject this_obj, jstring objectName, jstring symbolName) { const char *objectName_cstr, *symbolName_cstr; jlong addr; jboolean isCopy; objectName_cstr = NULL; if (objectName != NULL) { objectName_cstr = (*env)->GetStringUTFChars(env, objectName, &isCopy); CHECK_EXCEPTION_(0); } symbolName_cstr = (*env)->GetStringUTFChars(env, symbolName, &isCopy); CHECK_EXCEPTION_(0); print_debug("look for %s \n", symbolName_cstr); addr = (jlong) lookup_symbol(ph, objectName_cstr, symbolName_cstr); if (objectName_cstr != NULL) { (*env)->ReleaseStringUTFChars(env, objectName, objectName_cstr); } (*env)->ReleaseStringUTFChars(env, symbolName, symbolName_cstr); return addr; } /* * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal * Method: lookupByName0 * Signature: (Ljava/lang/String;Ljava/lang/String;)J */ JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByName0( JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) { struct ps_prochandle* ph = get_proc_handle(env, this_obj); if (ph != NULL && ph->core != NULL) { return lookupByNameIncore(env, ph, this_obj, objectName, symbolName); } jlong address = 0; JNF_COCOA_ENTER(env); NSString *symbolNameString = JNFJavaToNSString(env, symbolName); print_debug("lookupInProcess called for %s\n", [symbolNameString UTF8String]); id symbolicator = getSymbolicator(env, this_obj); if (symbolicator != nil) { uint64_t (*dynamicCall)(id, SEL, NSString *) = (uint64_t (*)(id, SEL, NSString *))&objc_msgSend; address = (jlong) dynamicCall(symbolicator, @selector(addressForSymbol:), symbolNameString); } print_debug("address of symbol %s = %llx\n", [symbolNameString UTF8String], address); JNF_COCOA_EXIT(env); return address; } /* * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal * Method: lookupByAddress0 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol; */ JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByAddress0 (JNIEnv *env, jobject this_obj, jlong addr) { uintptr_t offset; const char* sym = NULL; jstring sym_string; struct ps_prochandle* ph = get_proc_handle(env, this_obj); if (ph != NULL && ph->core != NULL) { sym = symbol_for_pc(ph, (uintptr_t) addr, &offset); if (sym == NULL) return 0; sym_string = (*env)->NewStringUTF(env, sym); CHECK_EXCEPTION_(0); return (*env)->CallObjectMethod(env, this_obj, createClosestSymbol_ID, sym_string, (jlong)offset); } return 0; } /** called from Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_readBytesFromProcess0 */ jbyteArray readBytesFromCore( JNIEnv *env, struct ps_prochandle *ph, jobject this_obj, jlong addr, jlong numBytes) { jboolean isCopy; jbyteArray array; jbyte *bufPtr; ps_err_e err; array = (*env)->NewByteArray(env, numBytes); CHECK_EXCEPTION_(0); bufPtr = (*env)->GetByteArrayElements(env, array, &isCopy); CHECK_EXCEPTION_(0); err = ps_pread(ph, (psaddr_t) (uintptr_t)addr, bufPtr, numBytes); (*env)->ReleaseByteArrayElements(env, array, bufPtr, 0); return (err == PS_OK)? array : 0; } /* * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal * Method: readBytesFromProcess0 * Signature: (JJ)Lsun/jvm/hotspot/debugger/ReadResult; */ JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_readBytesFromProcess0( JNIEnv *env, jobject this_obj, jlong addr, jlong numBytes) { print_debug("readBytesFromProcess called. addr = %llx numBytes = %lld\n", addr, numBytes); // must allocate storage instead of using former parameter buf jbyteArray array; struct ps_prochandle* ph = get_proc_handle(env, this_obj); if (ph != NULL && ph->core != NULL) { return readBytesFromCore(env, ph, this_obj, addr, numBytes); } array = (*env)->NewByteArray(env, numBytes); CHECK_EXCEPTION_(0); unsigned long alignedAddress; unsigned long alignedLength = 0; kern_return_t result; vm_offset_t *pages; int *mapped; long pageCount; uint byteCount; int i; unsigned long remaining; alignedAddress = trunc_page(addr); if (addr != alignedAddress) { alignedLength += addr - alignedAddress; } alignedLength = round_page(numBytes); pageCount = alignedLength/vm_page_size; // Allocate storage for pages and flags. pages = malloc(pageCount * sizeof(vm_offset_t)); mapped = calloc(pageCount, sizeof(int)); task_t gTask = getTask(env, this_obj); // Try to read each of the pages. for (i = 0; i < pageCount; i++) { result = vm_read(gTask, alignedAddress + i*vm_page_size, vm_page_size, &pages[i], &byteCount); mapped[i] = (result == KERN_SUCCESS); // assume all failures are unmapped pages } print_debug("%ld pages\n", pageCount); remaining = numBytes; for (i = 0; i < pageCount; i++) { unsigned long len = vm_page_size; unsigned long start = 0; if (i == 0) { start = addr - alignedAddress; len = vm_page_size - start; } if (i == (pageCount - 1)) { len = remaining; } if (mapped[i]) { print_debug("page %d mapped (len %ld start %ld)\n", i, len, start); (*env)->SetByteArrayRegion(env, array, 0, len, ((jbyte *) pages[i] + start)); vm_deallocate(mach_task_self(), pages[i], vm_page_size); } remaining -= len; } free (pages); free (mapped); return array; } /** Only used for core file reading, set thread_id for threads which is got after core file parsed. * Thread context is available in Mach-O core file but thread id is not. We can get thread id * from Threads which store all java threads information when they are created. Here we can identify * them as java threads by checking if a thread's rsp or rbp within a java thread's stack. * Note Macosx uses unique_thread_id which is different from other platforms though printed ids * are still pthread id. Function BsdDebuggerLocal.getJavaThreadsInfo returns an array of long * integers to host all java threads' id, stack_start, stack_end as: * [uid0, stack_start0, stack_end0, uid1, stack_start1, stack_end1, ...] * * The work cannot be done at init0 since Threads is not available yet(VM not initialized yet). * This function should be called only once if succeeded */ bool fill_java_threads(JNIEnv* env, jobject this_obj, struct ps_prochandle* ph) { int n = 0, i = 0, j; struct reg regs; jlongArray thrinfos = (*env)->CallObjectMethod(env, this_obj, getJavaThreadsInfo_ID); CHECK_EXCEPTION_(false); int len = (int)(*env)->GetArrayLength(env, thrinfos); uint64_t* cinfos = (uint64_t *)(*env)->GetLongArrayElements(env, thrinfos, NULL); CHECK_EXCEPTION_(false); n = get_num_threads(ph); print_debug("fill_java_threads called, num_of_thread = %d\n", n); for (i = 0; i < n; i++) { if (!get_nth_lwp_regs(ph, i, ®s)) { print_debug("Could not get regs of thread %d, already set!\n", i); return false; } for (j = 0; j < len; j += 3) { lwpid_t uid = cinfos[j]; uint64_t beg = cinfos[j + 1]; uint64_t end = cinfos[j + 2]; if ((regs.r_rsp < end && regs.r_rsp >= beg) || (regs.r_rbp < end && regs.r_rbp >= beg)) { set_lwp_id(ph, i, uid); break; } } } (*env)->ReleaseLongArrayElements(env, thrinfos, (jlong*)cinfos, 0); CHECK_EXCEPTION_(false); return true; } /* For core file only, called from * Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getThreadIntegerRegisterSet0 */ jlongArray getThreadIntegerRegisterSetFromCore(JNIEnv *env, jobject this_obj, long lwp_id, struct ps_prochandle* ph) { if (!_threads_filled) { if (!fill_java_threads(env, this_obj, ph)) { throw_new_debugger_exception(env, "Failed to fill in threads"); return 0; } else { _threads_filled = true; } } struct reg gregs; jboolean isCopy; jlongArray array; jlong *regs; if (get_lwp_regs(ph, lwp_id, &gregs) != true) { THROW_NEW_DEBUGGER_EXCEPTION_("get_thread_regs failed for a lwp", 0); } #undef NPRGREG #undef REG_INDEX #if amd64 #define NPRGREG sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_NPRGREG #define REG_INDEX(reg) sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_##reg array = (*env)->NewLongArray(env, NPRGREG); CHECK_EXCEPTION_(0); regs = (*env)->GetLongArrayElements(env, array, &isCopy); regs[REG_INDEX(R15)] = gregs.r_r15; regs[REG_INDEX(R14)] = gregs.r_r14; regs[REG_INDEX(R13)] = gregs.r_r13; regs[REG_INDEX(R12)] = gregs.r_r12; regs[REG_INDEX(RBP)] = gregs.r_rbp; regs[REG_INDEX(RBX)] = gregs.r_rbx; regs[REG_INDEX(R11)] = gregs.r_r11; regs[REG_INDEX(R10)] = gregs.r_r10; regs[REG_INDEX(R9)] = gregs.r_r9; regs[REG_INDEX(R8)] = gregs.r_r8; regs[REG_INDEX(RAX)] = gregs.r_rax; regs[REG_INDEX(RCX)] = gregs.r_rcx; regs[REG_INDEX(RDX)] = gregs.r_rdx; regs[REG_INDEX(RSI)] = gregs.r_rsi; regs[REG_INDEX(RDI)] = gregs.r_rdi; regs[REG_INDEX(RIP)] = gregs.r_rip; regs[REG_INDEX(CS)] = gregs.r_cs; regs[REG_INDEX(RSP)] = gregs.r_rsp; regs[REG_INDEX(SS)] = gregs.r_ss; regs[REG_INDEX(FSBASE)] = 0; regs[REG_INDEX(GSBASE)] = 0; regs[REG_INDEX(DS)] = gregs.r_ds; regs[REG_INDEX(ES)] = gregs.r_es; regs[REG_INDEX(FS)] = gregs.r_fs; regs[REG_INDEX(GS)] = gregs.r_gs; regs[REG_INDEX(TRAPNO)] = gregs.r_trapno; regs[REG_INDEX(RFL)] = gregs.r_rflags; #endif /* amd64 */ (*env)->ReleaseLongArrayElements(env, array, regs, JNI_COMMIT); return array; } /* * Lookup the thread_t that corresponds to the given thread_id. * The thread_id should be the result from calling thread_info() with THREAD_IDENTIFIER_INFO * and reading the m_ident_info.thread_id returned. * The returned thread_t is the mach send right to the kernel port for the corresponding thread. * * We cannot simply use the OSThread._thread_id field in the JVM. This is set to ::mach_thread_self() * in the VM, but that thread port is not valid for a remote debugger to access the thread. */ thread_t lookupThreadFromThreadId(task_t task, jlong thread_id) { print_debug("lookupThreadFromThreadId thread_id=0x%llx\n", thread_id); thread_array_t thread_list = NULL; mach_msg_type_number_t thread_list_count = 0; thread_t result_thread = 0; int i; // get the list of all the send rights kern_return_t result = task_threads(task, &thread_list, &thread_list_count); if (result != KERN_SUCCESS) { print_debug("task_threads returned 0x%x\n", result); return 0; } for(i = 0 ; i < thread_list_count; i++) { thread_identifier_info_data_t m_ident_info; mach_msg_type_number_t count = THREAD_IDENTIFIER_INFO_COUNT; // get the THREAD_IDENTIFIER_INFO for the send right result = thread_info(thread_list[i], THREAD_IDENTIFIER_INFO, (thread_info_t) &m_ident_info, &count); if (result != KERN_SUCCESS) { print_debug("thread_info returned 0x%x\n", result); break; } // if this is the one we're looking for, return the send right if (thread_id == m_ident_info.thread_id) { result_thread = thread_list[i]; break; } } vm_size_t thread_list_size = (vm_size_t) (thread_list_count * sizeof (thread_t)); vm_deallocate(mach_task_self(), (vm_address_t) thread_list, thread_list_count); return result_thread; } /* * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal * Method: getThreadIntegerRegisterSet0 * Signature: (J)[J */ JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getThreadIntegerRegisterSet0( JNIEnv *env, jobject this_obj, jlong thread_id) { print_debug("getThreadRegisterSet0 called\n"); struct ps_prochandle* ph = get_proc_handle(env, this_obj); if (ph != NULL && ph->core != NULL) { return getThreadIntegerRegisterSetFromCore(env, this_obj, thread_id, ph); } kern_return_t result; thread_t tid; mach_msg_type_number_t count = HSDB_THREAD_STATE_COUNT; hsdb_thread_state_t state; jlongArray registerArray; jlong *primitiveArray; task_t gTask = getTask(env, this_obj); tid = lookupThreadFromThreadId(gTask, thread_id); result = thread_get_state(tid, HSDB_THREAD_STATE, (thread_state_t)&state, &count); if (result != KERN_SUCCESS) { print_error("getregs: thread_get_state(%d) failed (%d)\n", tid, result); return NULL; } #if amd64 #define NPRGREG sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_NPRGREG #undef REG_INDEX #define REG_INDEX(reg) sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_##reg // 64 bit print_debug("Getting threads for a 64-bit process\n"); registerArray = (*env)->NewLongArray(env, NPRGREG); CHECK_EXCEPTION_(0); primitiveArray = (*env)->GetLongArrayElements(env, registerArray, NULL); primitiveArray[REG_INDEX(R15)] = state.__r15; primitiveArray[REG_INDEX(R14)] = state.__r14; primitiveArray[REG_INDEX(R13)] = state.__r13; primitiveArray[REG_INDEX(R12)] = state.__r12; primitiveArray[REG_INDEX(R11)] = state.__r11; primitiveArray[REG_INDEX(R10)] = state.__r10; primitiveArray[REG_INDEX(R9)] = state.__r9; primitiveArray[REG_INDEX(R8)] = state.__r8; primitiveArray[REG_INDEX(RDI)] = state.__rdi; primitiveArray[REG_INDEX(RSI)] = state.__rsi; primitiveArray[REG_INDEX(RBP)] = state.__rbp; primitiveArray[REG_INDEX(RBX)] = state.__rbx; primitiveArray[REG_INDEX(RDX)] = state.__rdx; primitiveArray[REG_INDEX(RCX)] = state.__rcx; primitiveArray[REG_INDEX(RAX)] = state.__rax; primitiveArray[REG_INDEX(TRAPNO)] = 0; // trapno, not used primitiveArray[REG_INDEX(ERR)] = 0; // err, not used primitiveArray[REG_INDEX(RIP)] = state.__rip; primitiveArray[REG_INDEX(CS)] = state.__cs; primitiveArray[REG_INDEX(RFL)] = state.__rflags; primitiveArray[REG_INDEX(RSP)] = state.__rsp; primitiveArray[REG_INDEX(SS)] = 0; // We don't have SS primitiveArray[REG_INDEX(FS)] = state.__fs; primitiveArray[REG_INDEX(GS)] = state.__gs; primitiveArray[REG_INDEX(ES)] = 0; primitiveArray[REG_INDEX(DS)] = 0; primitiveArray[REG_INDEX(FSBASE)] = 0; primitiveArray[REG_INDEX(GSBASE)] = 0; print_debug("set registers\n"); (*env)->ReleaseLongArrayElements(env, registerArray, primitiveArray, 0); #else #error UNSUPPORTED_ARCH #endif /* amd64 */ return registerArray; } /* * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal * Method: translateTID0 * Signature: (I)I */ JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_macosx_MacOSXDebuggerLocal_translateTID0( JNIEnv *env, jobject this_obj, jint tid) { print_debug("translateTID0 called on tid = 0x%x\n", (int)tid); kern_return_t result; thread_t foreign_tid, usable_tid; mach_msg_type_name_t type; foreign_tid = tid; task_t gTask = getTask(env, this_obj); result = mach_port_extract_right(gTask, foreign_tid, MACH_MSG_TYPE_COPY_SEND, &usable_tid, &type); if (result != KERN_SUCCESS) return -1; print_debug("translateTID0: 0x%x -> 0x%x\n", foreign_tid, usable_tid); return (jint) usable_tid; } static bool ptrace_continue(pid_t pid, int signal) { // pass the signal to the process so we don't swallow it int res; if ((res = ptrace(PT_CONTINUE, pid, (caddr_t)1, signal)) < 0) { print_error("attach: ptrace(PT_CONTINUE, %d) failed with %d\n", pid, res); return false; } return true; } // waits until the ATTACH has stopped the process // by signal SIGSTOP static bool ptrace_waitpid(pid_t pid) { int ret; int status; while (true) { // Wait for debuggee to stop. ret = waitpid(pid, &status, 0); if (ret >= 0) { if (WIFSTOPPED(status)) { // Any signal will stop the thread, make sure it is SIGSTOP. Otherwise SIGSTOP // will still be pending and delivered when the process is DETACHED and the process // will go to sleep. if (WSTOPSIG(status) == SIGSTOP) { // Debuggee stopped by SIGSTOP. return true; } if (!ptrace_continue(pid, WSTOPSIG(status))) { print_error("attach: Failed to correctly attach to VM. VM might HANG! [PTRACE_CONT failed, stopped by %d]\n", WSTOPSIG(status)); return false; } } else { print_error("attach: waitpid(): Child process exited/terminated (status = 0x%x)\n", status); return false; } } else { switch (errno) { case EINTR: continue; break; case ECHILD: print_error("attach: waitpid() failed. Child process pid (%d) does not exist \n", pid); break; case EINVAL: print_error("attach: waitpid() failed. Invalid options argument.\n"); break; default: print_error("attach: waitpid() failed. Unexpected error %d\n",errno); break; } return false; } } } // attach to a process/thread specified by "pid" static bool ptrace_attach(pid_t pid) { int res; if ((res = ptrace(PT_ATTACH, pid, 0, 0)) < 0) { print_error("ptrace(PT_ATTACH, %d) failed with %d\n", pid, res); return false; } else { return ptrace_waitpid(pid); } } /* * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal * Method: attach0 * Signature: (I)V */ JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__I( JNIEnv *env, jobject this_obj, jint jpid) { print_debug("attach0 called for jpid=%d\n", (int)jpid); JNF_COCOA_ENTER(env); kern_return_t result; task_t gTask = 0; result = task_for_pid(mach_task_self(), jpid, &gTask); if (result != KERN_SUCCESS) { print_error("attach: task_for_pid(%d) failed: '%s' (%d)\n", (int)jpid, mach_error_string(result), result); THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the process. Could be caused by an incorrect pid or lack of privileges."); } putTask(env, this_obj, gTask); // use ptrace to stop the process // on os x, ptrace only needs to be called on the process, not the individual threads if (ptrace_attach(jpid) != true) { mach_port_deallocate(mach_task_self(), gTask); THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the process"); } id symbolicator = nil; id jrsSymbolicator = objc_lookUpClass("JRSSymbolicator"); if (jrsSymbolicator != nil) { id (*dynamicCall)(id, SEL, pid_t) = (id (*)(id, SEL, pid_t))&objc_msgSend; symbolicator = dynamicCall(jrsSymbolicator, @selector(symbolicatorForPid:), (pid_t)jpid); } if (symbolicator != nil) { CFRetain(symbolicator); // pin symbolicator while in java heap } putSymbolicator(env, this_obj, symbolicator); if (symbolicator == nil) { THROW_NEW_DEBUGGER_EXCEPTION("Can't attach symbolicator to the process"); } JNF_COCOA_EXIT(env); } /** For core file, called from Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2 */ static void fillLoadObjects(JNIEnv* env, jobject this_obj, struct ps_prochandle* ph) { int n = 0, i = 0; // add load objects n = get_num_libs(ph); for (i = 0; i < n; i++) { uintptr_t base; const char* name; jobject loadObject; jobject loadObjectList; jstring nameString; base = get_lib_base(ph, i); name = get_lib_name(ph, i); nameString = (*env)->NewStringUTF(env, name); CHECK_EXCEPTION; loadObject = (*env)->CallObjectMethod(env, this_obj, createLoadObject_ID, nameString, (jlong)0, (jlong)base); CHECK_EXCEPTION; loadObjectList = (*env)->GetObjectField(env, this_obj, loadObjectList_ID); CHECK_EXCEPTION; (*env)->CallBooleanMethod(env, loadObjectList, listAdd_ID, loadObject); CHECK_EXCEPTION; } } /* * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal * Method: attach0 * Signature: (Ljava/lang/String;Ljava/lang/String;)V */ JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2( JNIEnv *env, jobject this_obj, jstring execName, jstring coreName) { const char *execName_cstr; const char *coreName_cstr; jboolean isCopy; struct ps_prochandle* ph; execName_cstr = (*env)->GetStringUTFChars(env, execName, &isCopy); CHECK_EXCEPTION; coreName_cstr = (*env)->GetStringUTFChars(env, coreName, &isCopy); CHECK_EXCEPTION; print_debug("attach: %s %s\n", execName_cstr, coreName_cstr); if ( (ph = Pgrab_core(execName_cstr, coreName_cstr)) == NULL) { (*env)->ReleaseStringUTFChars(env, execName, execName_cstr); (*env)->ReleaseStringUTFChars(env, coreName, coreName_cstr); THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the core file"); } (*env)->SetLongField(env, this_obj, p_ps_prochandle_ID, (jlong)(intptr_t)ph); (*env)->ReleaseStringUTFChars(env, execName, execName_cstr); (*env)->ReleaseStringUTFChars(env, coreName, coreName_cstr); fillLoadObjects(env, this_obj, ph); } /* * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal * Method: detach0 * Signature: ()V */ JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_detach0( JNIEnv *env, jobject this_obj) { print_debug("detach0 called\n"); struct ps_prochandle* ph = get_proc_handle(env, this_obj); if (ph != NULL && ph->core != NULL) { Prelease(ph); return; } JNF_COCOA_ENTER(env); task_t gTask = getTask(env, this_obj); // detach from the ptraced process causing it to resume execution int pid; kern_return_t k_res; k_res = pid_for_task(gTask, &pid); if (k_res != KERN_SUCCESS) { print_error("detach: pid_for_task(%d) failed (%d)\n", pid, k_res); } else { int res = ptrace(PT_DETACH, pid, 0, 0); if (res < 0) { print_error("detach: ptrace(PT_DETACH, %d) failed (%d)\n", pid, res); } } mach_port_deallocate(mach_task_self(), gTask); id symbolicator = getSymbolicator(env, this_obj); if (symbolicator != nil) { CFRelease(symbolicator); } JNF_COCOA_EXIT(env); }