truffle: src/share/vm/prims/jvmtiEnvBase.cpp comparison

comparison src/share/vm/prims/jvmtiEnvBase.cpp @ 0:a61af66fc99e jdk7-b24

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author	duke
date	Sat, 01 Dec 2007 00:00:00 +0000
parents
children	dbec32712472

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--1:000000000000
+:a61af66fc99e
+/*
+* Copyright 2003-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+* CA 95054 USA or visit www.sun.com if you need additional information or
+* have any questions.
+*
+*/
+# include "incls/_precompiled.incl"
+# include "incls/_jvmtiEnvBase.cpp.incl"
+///////////////////////////////////////////////////////////////
+//
+// JvmtiEnvBase
+//
+JvmtiEnvBase* JvmtiEnvBase::_head_environment = NULL;
+bool JvmtiEnvBase::_globally_initialized = false;
+volatile bool JvmtiEnvBase::_needs_clean_up = false;
+jvmtiPhase JvmtiEnvBase::_phase = JVMTI_PHASE_PRIMORDIAL;
+volatile int JvmtiEnvBase::_dying_thread_env_iteration_count = 0;
+extern jvmtiInterface_1_ jvmti_Interface;
+extern jvmtiInterface_1_ jvmtiTrace_Interface;
+// perform initializations that must occur before any JVMTI environments
+// are released but which should only be initialized once (no matter
+// how many environments are created).
+void
+JvmtiEnvBase::globally_initialize() {
+assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check");
+assert(_globally_initialized == false, "bad call");
+JvmtiManageCapabilities::initialize();
+#ifndef JVMTI_KERNEL
+// register extension functions and events
+JvmtiExtensions::register_extensions();
+#endif // !JVMTI_KERNEL
+#ifdef JVMTI_TRACE
+JvmtiTrace::initialize();
+#endif
+_globally_initialized = true;
+}
+void
+JvmtiEnvBase::initialize() {
+assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check");
+// Add this environment to the end of the environment list (order is important)
+{
+// This block of code must not contain any safepoints, as list deallocation
+// (which occurs at a safepoint) cannot occur simultaneously with this list
+// addition.  Note: No_Safepoint_Verifier cannot, currently, be used before
+// threads exist.
+JvmtiEnvIterator it;
+JvmtiEnvBase *previous_env = NULL;
+for (JvmtiEnvBase* env = it.first(); env != NULL; env = it.next(env)) {
+previous_env = env;
+}
+if (previous_env == NULL) {
+_head_environment = this;
+} else {
+previous_env->set_next_environment(this);
+}
+}
+if (_globally_initialized == false) {
+globally_initialize();
+}
+}
+JvmtiEnvBase::JvmtiEnvBase() : _env_event_enable() {
+_env_local_storage = NULL;
+_tag_map = NULL;
+_native_method_prefix_count = 0;
+_native_method_prefixes = NULL;
+_next = NULL;
+_class_file_load_hook_ever_enabled = false;
+// Moot since ClassFileLoadHook not yet enabled.
+// But "true" will give a more predictable ClassFileLoadHook behavior
+// for environment creation during ClassFileLoadHook.
+_is_retransformable = true;
+// all callbacks initially NULL
+memset(&_event_callbacks,0,sizeof(jvmtiEventCallbacks));
+// all capabilities initially off
+memset(&_current_capabilities, 0, sizeof(_current_capabilities));
+// all prohibited capabilities initially off
+memset(&_prohibited_capabilities, 0, sizeof(_prohibited_capabilities));
+_magic = JVMTI_MAGIC;
+JvmtiEventController::env_initialize((JvmtiEnv*)this);
+#ifdef JVMTI_TRACE
+_jvmti_external.functions = strlen(TraceJVMTI)? &jvmtiTrace_Interface : &jvmti_Interface;
+#else
+_jvmti_external.functions = &jvmti_Interface;
+#endif
+}
+void
+JvmtiEnvBase::dispose() {
+#ifdef JVMTI_TRACE
+JvmtiTrace::shutdown();
+#endif
+// Dispose of event info and let the event controller call us back
+// in a locked state (env_dispose, below)
+JvmtiEventController::env_dispose(this);
+}
+void
+JvmtiEnvBase::env_dispose() {
+assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check");
+// We have been entered with all events disabled on this environment.
+// A race to re-enable events (by setting callbacks) is prevented by
+// checking for a valid environment when setting callbacks (while
+// holding the JvmtiThreadState_lock).
+// Mark as invalid.
+_magic = DISPOSED_MAGIC;
+// Relinquish all capabilities.
+jvmtiCapabilities *caps = get_capabilities();
+JvmtiManageCapabilities::relinquish_capabilities(caps, caps, caps);
+// Same situation as with events (see above)
+set_native_method_prefixes(0, NULL);
+#ifndef JVMTI_KERNEL
+JvmtiTagMap* tag_map_to_deallocate = _tag_map;
+set_tag_map(NULL);
+// A tag map can be big, deallocate it now
+if (tag_map_to_deallocate != NULL) {
+delete tag_map_to_deallocate;
+}
+#endif // !JVMTI_KERNEL
+_needs_clean_up = true;
+}
+JvmtiEnvBase::~JvmtiEnvBase() {
+assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
+// There is a small window of time during which the tag map of a
+// disposed environment could have been reallocated.
+// Make sure it is gone.
+#ifndef JVMTI_KERNEL
+JvmtiTagMap* tag_map_to_deallocate = _tag_map;
+set_tag_map(NULL);
+// A tag map can be big, deallocate it now
+if (tag_map_to_deallocate != NULL) {
+delete tag_map_to_deallocate;
+}
+#endif // !JVMTI_KERNEL
+_magic = BAD_MAGIC;
+}
+void
+JvmtiEnvBase::periodic_clean_up() {
+assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
+// JvmtiEnvBase reference is saved in JvmtiEnvThreadState. So
+// clean up JvmtiThreadState before deleting JvmtiEnv pointer.
+JvmtiThreadState::periodic_clean_up();
+// Unlink all invalid environments from the list of environments
+// and deallocate them
+JvmtiEnvIterator it;
+JvmtiEnvBase* previous_env = NULL;
+JvmtiEnvBase* env = it.first();
+while (env != NULL) {
+if (env->is_valid()) {
+previous_env = env;
+env = it.next(env);
+} else {
+// This one isn't valid, remove it from the list and deallocate it
+JvmtiEnvBase* defunct_env = env;
+env = it.next(env);
+if (previous_env == NULL) {
+_head_environment = env;
+} else {
+previous_env->set_next_environment(env);
+}
+delete defunct_env;
+}
+}
+}
+void
+JvmtiEnvBase::check_for_periodic_clean_up() {
+assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
+class ThreadInsideIterationClosure: public ThreadClosure {
+private:
+bool _inside;
+public:
+ThreadInsideIterationClosure() : _inside(false) {};
+void do_thread(Thread* thread) {
+_inside |= thread->is_inside_jvmti_env_iteration();
+}
+bool is_inside_jvmti_env_iteration() {
+return _inside;
+}
+};
+if (_needs_clean_up) {
+// Check if we are currently iterating environment,
+// deallocation should not occur if we are
+ThreadInsideIterationClosure tiic;
+Threads::threads_do(&tiic);
+if (!tiic.is_inside_jvmti_env_iteration() &&
+!is_inside_dying_thread_env_iteration()) {
+_needs_clean_up = false;
+JvmtiEnvBase::periodic_clean_up();
+}
+}
+}
+void
+JvmtiEnvBase::record_first_time_class_file_load_hook_enabled() {
+assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(),
+"sanity check");
+if (!_class_file_load_hook_ever_enabled) {
+_class_file_load_hook_ever_enabled = true;
+if (get_capabilities()->can_retransform_classes) {
+_is_retransformable = true;
+} else {
+_is_retransformable = false;
+// cannot add retransform capability after ClassFileLoadHook has been enabled
+get_prohibited_capabilities()->can_retransform_classes = 1;
+}
+}
+}
+void
+JvmtiEnvBase::record_class_file_load_hook_enabled() {
+if (!_class_file_load_hook_ever_enabled) {
+if (Threads::number_of_threads() == 0) {
+record_first_time_class_file_load_hook_enabled();
+} else {
+MutexLocker mu(JvmtiThreadState_lock);
+record_first_time_class_file_load_hook_enabled();
+}
+}
+}
+jvmtiError
+JvmtiEnvBase::set_native_method_prefixes(jint prefix_count, char** prefixes) {
+assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(),
+"sanity check");
+int old_prefix_count = get_native_method_prefix_count();
+char **old_prefixes = get_native_method_prefixes();
+// allocate and install the new prefixex
+if (prefix_count == 0 || !is_valid()) {
+_native_method_prefix_count = 0;
+_native_method_prefixes = NULL;
+} else {
+// there are prefixes, allocate an array to hold them, and fill it
+char** new_prefixes = (char**)os::malloc((prefix_count) * sizeof(char*));
+if (new_prefixes == NULL) {
+return JVMTI_ERROR_OUT_OF_MEMORY;
+}
+for (int i = 0; i < prefix_count; i++) {
+char* prefix = prefixes[i];
+if (prefix == NULL) {
+for (int j = 0; j < (i-1); j++) {
+os::free(new_prefixes[j]);
+}
+os::free(new_prefixes);
+return JVMTI_ERROR_NULL_POINTER;
+}
+prefix = os::strdup(prefixes[i]);
+if (prefix == NULL) {
+for (int j = 0; j < (i-1); j++) {
+os::free(new_prefixes[j]);
+}
+os::free(new_prefixes);
+return JVMTI_ERROR_OUT_OF_MEMORY;
+}
+new_prefixes[i] = prefix;
+}
+_native_method_prefix_count = prefix_count;
+_native_method_prefixes = new_prefixes;
+}
+// now that we know the new prefixes have been successfully installed we can
+// safely remove the old ones
+if (old_prefix_count != 0) {
+for (int i = 0; i < old_prefix_count; i++) {
+os::free(old_prefixes[i]);
+}
+os::free(old_prefixes);
+}
+return JVMTI_ERROR_NONE;
+}
+// Collect all the prefixes which have been set in any JVM TI environments
+// by the SetNativeMethodPrefix(es) functions.  Be sure to maintain the
+// order of environments and the order of prefixes within each environment.
+// Return in a resource allocated array.
+char**
+JvmtiEnvBase::get_all_native_method_prefixes(int* count_ptr) {
+assert(Threads::number_of_threads() == 0 ||
+SafepointSynchronize::is_at_safepoint() ||
+JvmtiThreadState_lock->is_locked(),
+"sanity check");
+int total_count = 0;
+GrowableArray<char*>* prefix_array =new GrowableArray<char*>(5);
+JvmtiEnvIterator it;
+for (JvmtiEnvBase* env = it.first(); env != NULL; env = it.next(env)) {
+int prefix_count = env->get_native_method_prefix_count();
+char** prefixes = env->get_native_method_prefixes();
+for (int j = 0; j < prefix_count; j++) {
+// retrieve a prefix and so that it is safe against asynchronous changes
+// copy it into the resource area
+char* prefix = prefixes[j];
+char* prefix_copy = NEW_RESOURCE_ARRAY(char, strlen(prefix)+1);
+strcpy(prefix_copy, prefix);
+prefix_array->at_put_grow(total_count++, prefix_copy);
+}
+}
+char** all_prefixes = NEW_RESOURCE_ARRAY(char*, total_count);
+char** p = all_prefixes;
+for (int i = 0; i < total_count; ++i) {
+*p++ = prefix_array->at(i);
+}
+*count_ptr = total_count;
+return all_prefixes;
+}
+void
+JvmtiEnvBase::set_event_callbacks(const jvmtiEventCallbacks* callbacks,
+jint size_of_callbacks) {
+assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check");
+size_t byte_cnt = sizeof(jvmtiEventCallbacks);
+// clear in either case to be sure we got any gap between sizes
+memset(&_event_callbacks, 0, byte_cnt);
+// Now that JvmtiThreadState_lock is held, prevent a possible race condition where events
+// are re-enabled by a call to set event callbacks where the DisposeEnvironment
+// occurs after the boiler-plate environment check and before the lock is acquired.
+if (callbacks != NULL && is_valid()) {
+if (size_of_callbacks < (jint)byte_cnt) {
+byte_cnt = size_of_callbacks;
+}
+memcpy(&_event_callbacks, callbacks, byte_cnt);
+}
+}
+// Called from JVMTI entry points which perform stack walking. If the
+// associated JavaThread is the current thread, then wait_for_suspend
+// is not used. Otherwise, it determines if we should wait for the
+// "other" thread to complete external suspension. (NOTE: in future
+// releases the suspension mechanism should be reimplemented so this
+// is not necessary.)
+//
+bool
+JvmtiEnvBase::is_thread_fully_suspended(JavaThread* thr, bool wait_for_suspend, uint32_t *bits) {
+// "other" threads require special handling
+if (thr != JavaThread::current()) {
+if (wait_for_suspend) {
+// We are allowed to wait for the external suspend to complete
+// so give the other thread a chance to get suspended.
+if (!thr->wait_for_ext_suspend_completion(SuspendRetryCount,
+SuspendRetryDelay, bits)) {
+// didn't make it so let the caller know
+return false;
+}
+}
+// We aren't allowed to wait for the external suspend to complete
+// so if the other thread isn't externally suspended we need to
+// let the caller know.
+else if (!thr->is_ext_suspend_completed_with_lock(bits)) {
+return false;
+}
+}
+return true;
+}
+// In the fullness of time, all users of the method should instead
+// directly use allocate, besides being cleaner and faster, this will
+// mean much better out of memory handling
+unsigned char *
+JvmtiEnvBase::jvmtiMalloc(jlong size) {
+unsigned char* mem;
+jvmtiError result = allocate(size, &mem);
+assert(result == JVMTI_ERROR_NONE, "Allocate failed");
+return mem;
+}
+//
+// Threads
+//
+jobject *
+JvmtiEnvBase::new_jobjectArray(int length, Handle *handles) {
+if (length == 0) {
+return NULL;
+}
+jobject *objArray = (jobject *) jvmtiMalloc(sizeof(jobject) * length);
+NULL_CHECK(objArray, NULL);
+for (int i=0; i<length; i++) {
+objArray[i] = jni_reference(handles[i]);
+}
+return objArray;
+}
+jthread *
+JvmtiEnvBase::new_jthreadArray(int length, Handle *handles) {
+return (jthread *) new_jobjectArray(length,handles);
+}
+jthreadGroup *
+JvmtiEnvBase::new_jthreadGroupArray(int length, Handle *handles) {
+return (jthreadGroup *) new_jobjectArray(length,handles);
+}
+JavaThread *
+JvmtiEnvBase::get_JavaThread(jthread jni_thread) {
+oop t = JNIHandles::resolve_external_guard(jni_thread);
+if (t == NULL || !t->is_a(SystemDictionary::thread_klass())) {
+return NULL;
+}
+// The following returns NULL if the thread has not yet run or is in
+// process of exiting
+return java_lang_Thread::thread(t);
+}
+// update the access_flags for the field in the klass
+void
+JvmtiEnvBase::update_klass_field_access_flag(fieldDescriptor *fd) {
+instanceKlass* ik = instanceKlass::cast(fd->field_holder());
+typeArrayOop fields = ik->fields();
+fields->ushort_at_put(fd->index(), (jushort)fd->access_flags().as_short());
+}
+// return the vframe on the specified thread and depth, NULL if no such frame
+vframe*
+JvmtiEnvBase::vframeFor(JavaThread* java_thread, jint depth) {
+if (!java_thread->has_last_Java_frame()) {
+return NULL;
+}
+RegisterMap reg_map(java_thread);
+vframe *vf = java_thread->last_java_vframe(&reg_map);
+int d = 0;
+while ((vf != NULL) && (d < depth)) {
+vf = vf->java_sender();
+d++;
+}
+return vf;
+}
+//
+// utilities: JNI objects
+//
+jclass
+JvmtiEnvBase::get_jni_class_non_null(klassOop k) {
+assert(k != NULL, "k != NULL");
+return (jclass)jni_reference(Klass::cast(k)->java_mirror());
+}
+#ifndef JVMTI_KERNEL
+//
+// Field Information
+//
+bool
+JvmtiEnvBase::get_field_descriptor(klassOop k, jfieldID field, fieldDescriptor* fd) {
+if (!jfieldIDWorkaround::is_valid_jfieldID(k, field)) {
+return false;
+}
+bool found = false;
+if (jfieldIDWorkaround::is_static_jfieldID(field)) {
+JNIid* id = jfieldIDWorkaround::from_static_jfieldID(field);
+int offset = id->offset();
+klassOop holder = id->holder();
+found = instanceKlass::cast(holder)->find_local_field_from_offset(offset, true, fd);
+} else {
+// Non-static field. The fieldID is really the offset of the field within the object.
+int offset = jfieldIDWorkaround::from_instance_jfieldID(k, field);
+found = instanceKlass::cast(k)->find_field_from_offset(offset, false, fd);
+}
+return found;
+}
+//
+// Object Monitor Information
+//
+//
+// Count the number of objects for a lightweight monitor. The hobj
+// parameter is object that owns the monitor so this routine will
+// count the number of times the same object was locked by frames
+// in java_thread.
+//
+jint
+JvmtiEnvBase::count_locked_objects(JavaThread *java_thread, Handle hobj) {
+jint ret = 0;
+if (!java_thread->has_last_Java_frame()) {
+return ret;  // no Java frames so no monitors
+}
+ResourceMark rm;
+HandleMark   hm;
+RegisterMap  reg_map(java_thread);
+for(javaVFrame *jvf=java_thread->last_java_vframe(&reg_map); jvf != NULL;
+jvf = jvf->java_sender()) {
+GrowableArray<MonitorInfo*>* mons = jvf->monitors();
+if (!mons->is_empty()) {
+for (int i = 0; i < mons->length(); i++) {
+MonitorInfo *mi = mons->at(i);
+// see if owner of the monitor is our object
+if (mi->owner() != NULL && mi->owner() == hobj()) {
+ret++;
+}
+}
+}
+}
+return ret;
+}
+jvmtiError
+JvmtiEnvBase::get_current_contended_monitor(JavaThread *calling_thread, JavaThread *java_thread, jobject *monitor_ptr) {
+#ifdef ASSERT
+uint32_t debug_bits = 0;
+#endif
+assert((SafepointSynchronize::is_at_safepoint() ||
+is_thread_fully_suspended(java_thread, false, &debug_bits)),
+"at safepoint or target thread is suspended");
+oop obj = NULL;
+ObjectMonitor *mon = java_thread->current_waiting_monitor();
+if (mon == NULL) {
+// thread is not doing an Object.wait() call
+mon = java_thread->current_pending_monitor();
+if (mon != NULL) {
+// The thread is trying to enter() or raw_enter() an ObjectMonitor.
+obj = (oop)mon->object();
+// If obj == NULL, then ObjectMonitor is raw which doesn't count
+// as contended for this API
+}
+// implied else: no contended ObjectMonitor
+} else {
+// thread is doing an Object.wait() call
+obj = (oop)mon->object();
+assert(obj != NULL, "Object.wait() should have an object");
+}
+if (obj == NULL) {
+*monitor_ptr = NULL;
+} else {
+HandleMark hm;
+Handle     hobj(obj);
+*monitor_ptr = jni_reference(calling_thread, hobj);
+}
+return JVMTI_ERROR_NONE;
+}
+jvmtiError
+JvmtiEnvBase::get_owned_monitors(JavaThread *calling_thread, JavaThread* java_thread,
+GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list) {
+jvmtiError err = JVMTI_ERROR_NONE;
+#ifdef ASSERT
+uint32_t debug_bits = 0;
+#endif
+assert((SafepointSynchronize::is_at_safepoint() ||
+is_thread_fully_suspended(java_thread, false, &debug_bits)),
+"at safepoint or target thread is suspended");
+if (java_thread->has_last_Java_frame()) {
+ResourceMark rm;
+HandleMark   hm;
+RegisterMap  reg_map(java_thread);
+int depth = 0;
+for (javaVFrame *jvf = java_thread->last_java_vframe(&reg_map); jvf != NULL;
+jvf = jvf->java_sender()) {
+if (depth++ < MaxJavaStackTraceDepth) {  // check for stack too deep
+// add locked objects for this frame into list
+err = get_locked_objects_in_frame(calling_thread, java_thread, jvf, owned_monitors_list, depth-1);
+if (err != JVMTI_ERROR_NONE) {
+return err;
+}
+}
+}
+}
+// Get off stack monitors. (e.g. acquired via jni MonitorEnter).
+JvmtiMonitorClosure jmc(java_thread, calling_thread, owned_monitors_list, this);
+ObjectSynchronizer::monitors_iterate(&jmc);
+err = jmc.error();
+return err;
+}
+// Save JNI local handles for any objects that this frame owns.
+jvmtiError
+JvmtiEnvBase::get_locked_objects_in_frame(JavaThread* calling_thread, JavaThread* java_thread,
+javaVFrame *jvf, GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitors_list, int stack_depth) {
+jvmtiError err = JVMTI_ERROR_NONE;
+ResourceMark rm;
+GrowableArray<MonitorInfo*>* mons = jvf->monitors();
+if (mons->is_empty()) {
+return err;  // this javaVFrame holds no monitors
+}
+HandleMark hm;
+oop wait_obj = NULL;
+{
+// save object of current wait() call (if any) for later comparison
+ObjectMonitor *mon = java_thread->current_waiting_monitor();
+if (mon != NULL) {
+wait_obj = (oop)mon->object();
+}
+}
+oop pending_obj = NULL;
+{
+// save object of current enter() call (if any) for later comparison
+ObjectMonitor *mon = java_thread->current_pending_monitor();
+if (mon != NULL) {
+pending_obj = (oop)mon->object();
+}
+}
+for (int i = 0; i < mons->length(); i++) {
+MonitorInfo *mi = mons->at(i);
+oop obj = mi->owner();
+if (obj == NULL) {
+// this monitor doesn't have an owning object so skip it
+continue;
+}
+if (wait_obj == obj) {
+// the thread is waiting on this monitor so it isn't really owned
+continue;
+}
+if (pending_obj == obj) {
+// the thread is pending on this monitor so it isn't really owned
+continue;
+}
+if (owned_monitors_list->length() > 0) {
+// Our list has at least one object on it so we have to check
+// for recursive object locking
+bool found = false;
+for (int j = 0; j < owned_monitors_list->length(); j++) {
+jobject jobj = ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(j))->monitor;
+oop check = JNIHandles::resolve(jobj);
+if (check == obj) {
+found = true;  // we found the object
+break;
+}
+}
+if (found) {
+// already have this object so don't include it
+continue;
+}
+}
+// add the owning object to our list
+jvmtiMonitorStackDepthInfo *jmsdi;
+err = allocate(sizeof(jvmtiMonitorStackDepthInfo), (unsigned char **)&jmsdi);
+if (err != JVMTI_ERROR_NONE) {
+return err;
+}
+Handle hobj(obj);
+jmsdi->monitor = jni_reference(calling_thread, hobj);
+jmsdi->stack_depth = stack_depth;
+owned_monitors_list->append(jmsdi);
+}
+return err;
+}
+jvmtiError
+JvmtiEnvBase::get_stack_trace(JavaThread *java_thread,
+jint start_depth, jint max_count,
+jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
+#ifdef ASSERT
+uint32_t debug_bits = 0;
+#endif
+assert((SafepointSynchronize::is_at_safepoint() ||
+is_thread_fully_suspended(java_thread, false, &debug_bits)),
+"at safepoint or target thread is suspended");
+int count = 0;
+if (java_thread->has_last_Java_frame()) {
+RegisterMap reg_map(java_thread);
+Thread* current_thread = Thread::current();
+ResourceMark rm(current_thread);
+javaVFrame *jvf = java_thread->last_java_vframe(&reg_map);
+HandleMark hm(current_thread);
+if (start_depth != 0) {
+if (start_depth > 0) {
+for (int j = 0; j < start_depth && jvf != NULL; j++) {
+jvf = jvf->java_sender();
+}
+if (jvf == NULL) {
+// start_depth is deeper than the stack depth
+return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+}
+} else { // start_depth < 0
+// we are referencing the starting depth based on the oldest
+// part of the stack.
+// optimize to limit the number of times that java_sender() is called
+javaVFrame *jvf_cursor = jvf;
+javaVFrame *jvf_prev = NULL;
+javaVFrame *jvf_prev_prev;
+int j = 0;
+while (jvf_cursor != NULL) {
+jvf_prev_prev = jvf_prev;
+jvf_prev = jvf_cursor;
+for (j = 0; j > start_depth && jvf_cursor != NULL; j--) {
+jvf_cursor = jvf_cursor->java_sender();
+}
+}
+if (j == start_depth) {
+// previous pointer is exactly where we want to start
+jvf = jvf_prev;
+} else {
+// we need to back up further to get to the right place
+if (jvf_prev_prev == NULL) {
+// the -start_depth is greater than the stack depth
+return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+}
+// j now is the number of frames on the stack starting with
+// jvf_prev, we start from jvf_prev_prev and move older on
+// the stack that many, the result is -start_depth frames
+// remaining.
+jvf = jvf_prev_prev;
+for (; j < 0; j++) {
+jvf = jvf->java_sender();
+}
+}
+}
+}
+for (; count < max_count && jvf != NULL; count++) {
+frame_buffer[count].method = jvf->method()->jmethod_id();
+frame_buffer[count].location = (jvf->method()->is_native() ? -1 : jvf->bci());
+jvf = jvf->java_sender();
+}
+} else {
+if (start_depth != 0) {
+// no frames and there is a starting depth
+return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+}
+}
+*count_ptr = count;
+return JVMTI_ERROR_NONE;
+}
+jvmtiError
+JvmtiEnvBase::get_frame_count(JvmtiThreadState *state, jint *count_ptr) {
+assert((state != NULL),
+"JavaThread should create JvmtiThreadState before calling this method");
+*count_ptr = state->count_frames();
+return JVMTI_ERROR_NONE;
+}
+jvmtiError
+JvmtiEnvBase::get_frame_location(JavaThread *java_thread, jint depth,
+jmethodID* method_ptr, jlocation* location_ptr) {
+#ifdef ASSERT
+uint32_t debug_bits = 0;
+#endif
+assert((SafepointSynchronize::is_at_safepoint() ||
+is_thread_fully_suspended(java_thread, false, &debug_bits)),
+"at safepoint or target thread is suspended");
+Thread* current_thread = Thread::current();
+ResourceMark rm(current_thread);
+vframe *vf = vframeFor(java_thread, depth);
+if (vf == NULL) {
+return JVMTI_ERROR_NO_MORE_FRAMES;
+}
+// vframeFor should return a java frame. If it doesn't
+// it means we've got an internal error and we return the
+// error in product mode. In debug mode we will instead
+// attempt to cast the vframe to a javaVFrame and will
+// cause an assertion/crash to allow further diagnosis.
+#ifdef PRODUCT
+if (!vf->is_java_frame()) {
+return JVMTI_ERROR_INTERNAL;
+}
+#endif
+HandleMark hm(current_thread);
+javaVFrame *jvf = javaVFrame::cast(vf);
+methodOop method = jvf->method();
+if (method->is_native()) {
+*location_ptr = -1;
+} else {
+*location_ptr = jvf->bci();
+}
+*method_ptr = method->jmethod_id();
+return JVMTI_ERROR_NONE;
+}
+jvmtiError
+JvmtiEnvBase::get_object_monitor_usage(JavaThread* calling_thread, jobject object, jvmtiMonitorUsage* info_ptr) {
+HandleMark hm;
+Handle hobj;
+bool at_safepoint = SafepointSynchronize::is_at_safepoint();
+// Check arguments
+{
+oop mirror = JNIHandles::resolve_external_guard(object);
+NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
+NULL_CHECK(info_ptr, JVMTI_ERROR_NULL_POINTER);
+hobj = Handle(mirror);
+}
+JavaThread *owning_thread = NULL;
+ObjectMonitor *mon = NULL;
+jvmtiMonitorUsage ret = {
+NULL, 0, 0, NULL, 0, NULL
+};
+uint32_t debug_bits = 0;
+// first derive the object's owner and entry_count (if any)
+{
+// Revoke any biases before querying the mark word
+if (SafepointSynchronize::is_at_safepoint()) {
+BiasedLocking::revoke_at_safepoint(hobj);
+} else {
+BiasedLocking::revoke_and_rebias(hobj, false, calling_thread);
+}
+address owner = NULL;
+{
+markOop mark = hobj()->mark();
+if (!mark->has_monitor()) {
+// this object has a lightweight monitor
+if (mark->has_locker()) {
+owner = (address)mark->locker(); // save the address of the Lock word
+}
+// implied else: no owner
+} else {
+// this object has a heavyweight monitor
+mon = mark->monitor();
+// The owner field of a heavyweight monitor may be NULL for no
+// owner, a JavaThread * or it may still be the address of the
+// Lock word in a JavaThread's stack. A monitor can be inflated
+// by a non-owning JavaThread, but only the owning JavaThread
+// can change the owner field from the Lock word to the
+// JavaThread * and it may not have done that yet.
+owner = (address)mon->owner();
+}
+}
+if (owner != NULL) {
+// This monitor is owned so we have to find the owning JavaThread.
+// Since owning_thread_from_monitor_owner() grabs a lock, GC can
+// move our object at this point. However, our owner value is safe
+// since it is either the Lock word on a stack or a JavaThread *.
+owning_thread = Threads::owning_thread_from_monitor_owner(owner, !at_safepoint);
+assert(owning_thread != NULL, "sanity check");
+if (owning_thread != NULL) {  // robustness
+// The monitor's owner either has to be the current thread, at safepoint
+// or it has to be suspended. Any of these conditions will prevent both
+// contending and waiting threads from modifying the state of
+// the monitor.
+if (!at_safepoint && !JvmtiEnv::is_thread_fully_suspended(owning_thread, true, &debug_bits)) {
+return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
+}
+HandleMark hm;
+Handle     th(owning_thread->threadObj());
+ret.owner = (jthread)jni_reference(calling_thread, th);
+}
+// implied else: no owner
+}
+if (owning_thread != NULL) {  // monitor is owned
+if ((address)owning_thread == owner) {
+// the owner field is the JavaThread *
+assert(mon != NULL,
+"must have heavyweight monitor with JavaThread * owner");
+ret.entry_count = mon->recursions() + 1;
+} else {
+// The owner field is the Lock word on the JavaThread's stack
+// so the recursions field is not valid. We have to count the
+// number of recursive monitor entries the hard way. We pass
+// a handle to survive any GCs along the way.
+ResourceMark rm;
+ret.entry_count = count_locked_objects(owning_thread, hobj);
+}
+}
+// implied else: entry_count == 0
+}
+int nWant,nWait;
+if (mon != NULL) {
+// this object has a heavyweight monitor
+nWant = mon->contentions(); // # of threads contending for monitor
+nWait = mon->waiters();     // # of threads in Object.wait()
+ret.waiter_count = nWant + nWait;
+ret.notify_waiter_count = nWait;
+} else {
+// this object has a lightweight monitor
+ret.waiter_count = 0;
+ret.notify_waiter_count = 0;
+}
+// Allocate memory for heavyweight and lightweight monitor.
+jvmtiError err;
+err = allocate(ret.waiter_count * sizeof(jthread *), (unsigned char**)&ret.waiters);
+if (err != JVMTI_ERROR_NONE) {
+return err;
+}
+err = allocate(ret.notify_waiter_count * sizeof(jthread *),
+(unsigned char**)&ret.notify_waiters);
+if (err != JVMTI_ERROR_NONE) {
+deallocate((unsigned char*)ret.waiters);
+return err;
+}
+// now derive the rest of the fields
+if (mon != NULL) {
+// this object has a heavyweight monitor
+// Number of waiters may actually be less than the waiter count.
+// So NULL out memory so that unused memory will be NULL.
+memset(ret.waiters, 0, ret.waiter_count * sizeof(jthread *));
+memset(ret.notify_waiters, 0, ret.notify_waiter_count * sizeof(jthread *));
+if (ret.waiter_count > 0) {
+// we have contending and/or waiting threads
+HandleMark hm;
+if (nWant > 0) {
+// we have contending threads
+ResourceMark rm;
+// get_pending_threads returns only java thread so we do not need to
+// check for  non java threads.
+GrowableArray<JavaThread*>* wantList = Threads::get_pending_threads(
+nWant, (address)mon, !at_safepoint);
+if (wantList->length() < nWant) {
+// robustness: the pending list has gotten smaller
+nWant = wantList->length();
+}
+for (int i = 0; i < nWant; i++) {
+JavaThread *pending_thread = wantList->at(i);
+// If the monitor has no owner, then a non-suspended contending
+// thread could potentially change the state of the monitor by
+// entering it. The JVM/TI spec doesn't allow this.
+if (owning_thread == NULL && !at_safepoint &
+!JvmtiEnv::is_thread_fully_suspended(pending_thread, true, &debug_bits)) {
+if (ret.owner != NULL) {
+destroy_jni_reference(calling_thread, ret.owner);
+}
+for (int j = 0; j < i; j++) {
+destroy_jni_reference(calling_thread, ret.waiters[j]);
+}
+deallocate((unsigned char*)ret.waiters);
+deallocate((unsigned char*)ret.notify_waiters);
+return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
+}
+Handle th(pending_thread->threadObj());
+ret.waiters[i] = (jthread)jni_reference(calling_thread, th);
+}
+}
+if (nWait > 0) {
+// we have threads in Object.wait()
+int offset = nWant;  // add after any contending threads
+ObjectWaiter *waiter = mon->first_waiter();
+for (int i = 0, j = 0; i < nWait; i++) {
+if (waiter == NULL) {
+// robustness: the waiting list has gotten smaller
+nWait = j;
+break;
+}
+Thread *t = mon->thread_of_waiter(waiter);
+if (t != NULL && t->is_Java_thread()) {
+JavaThread *wjava_thread = (JavaThread *)t;
+// If the thread was found on the ObjectWaiter list, then
+// it has not been notified. This thread can't change the
+// state of the monitor so it doesn't need to be suspended.
+Handle th(wjava_thread->threadObj());
+ret.waiters[offset + j] = (jthread)jni_reference(calling_thread, th);
+ret.notify_waiters[j++] = (jthread)jni_reference(calling_thread, th);
+}
+waiter = mon->next_waiter(waiter);
+}
+}
+}
+// Adjust count. nWant and nWait count values may be less than original.
+ret.waiter_count = nWant + nWait;
+ret.notify_waiter_count = nWait;
+} else {
+// this object has a lightweight monitor and we have nothing more
+// to do here because the defaults are just fine.
+}
+// we don't update return parameter unless everything worked
+*info_ptr = ret;
+return JVMTI_ERROR_NONE;
+}
+ResourceTracker::ResourceTracker(JvmtiEnv* env) {
+_env = env;
+_allocations = new (ResourceObj::C_HEAP) GrowableArray<unsigned char*>(20, true);
+_failed = false;
+}
+ResourceTracker::~ResourceTracker() {
+if (_failed) {
+for (int i=0; i<_allocations->length(); i++) {
+_env->deallocate(_allocations->at(i));
+}
+}
+delete _allocations;
+}
+jvmtiError ResourceTracker::allocate(jlong size, unsigned char** mem_ptr) {
+unsigned char *ptr;
+jvmtiError err = _env->allocate(size, &ptr);
+if (err == JVMTI_ERROR_NONE) {
+_allocations->append(ptr);
+*mem_ptr = ptr;
+} else {
+*mem_ptr = NULL;
+_failed = true;
+}
+return err;
+}
+unsigned char* ResourceTracker::allocate(jlong size) {
+unsigned char* ptr;
+allocate(size, &ptr);
+return ptr;
+}
+char* ResourceTracker::strdup(const char* str) {
+char *dup_str = (char*)allocate(strlen(str)+1);
+if (dup_str != NULL) {
+strcpy(dup_str, str);
+}
+return dup_str;
+}
+struct StackInfoNode {
+struct StackInfoNode *next;
+jvmtiStackInfo info;
+};
+// Create a jvmtiStackInfo inside a linked list node and create a
+// buffer for the frame information, both allocated as resource objects.
+// Fill in both the jvmtiStackInfo and the jvmtiFrameInfo.
+// Note that either or both of thr and thread_oop
+// may be null if the thread is new or has exited.
+void
+VM_GetMultipleStackTraces::fill_frames(jthread jt, JavaThread *thr, oop thread_oop) {
+assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
+jint state = 0;
+struct StackInfoNode *node = NEW_RESOURCE_OBJ(struct StackInfoNode);
+jvmtiStackInfo *infop = &(node->info);
+node->next = head();
+set_head(node);
+infop->frame_count = 0;
+infop->thread = jt;
+if (thread_oop != NULL) {
+// get most state bits
+state = (jint)java_lang_Thread::get_thread_status(thread_oop);
+}
+if (thr != NULL) {    // add more state bits if there is a JavaThead to query
+// same as is_being_ext_suspended() but without locking
+if (thr->is_ext_suspended() || thr->is_external_suspend()) {
+state |= JVMTI_THREAD_STATE_SUSPENDED;
+}
+JavaThreadState jts = thr->thread_state();
+if (jts == _thread_in_native) {
+state |= JVMTI_THREAD_STATE_IN_NATIVE;
+}
+OSThread* osThread = thr->osthread();
+if (osThread != NULL && osThread->interrupted()) {
+state |= JVMTI_THREAD_STATE_INTERRUPTED;
+}
+}
+infop->state = state;
+if (thr != NULL || (state & JVMTI_THREAD_STATE_ALIVE) != 0) {
+infop->frame_buffer = NEW_RESOURCE_ARRAY(jvmtiFrameInfo, max_frame_count());
+env()->get_stack_trace(thr, 0, max_frame_count(),
+infop->frame_buffer, &(infop->frame_count));
+} else {
+infop->frame_buffer = NULL;
+infop->frame_count = 0;
+}
+_frame_count_total += infop->frame_count;
+}
+// Based on the stack information in the linked list, allocate memory
+// block to return and fill it from the info in the linked list.
+void
+VM_GetMultipleStackTraces::allocate_and_fill_stacks(jint thread_count) {
+// do I need to worry about alignment issues?
+jlong alloc_size =  thread_count       * sizeof(jvmtiStackInfo)
++ _frame_count_total * sizeof(jvmtiFrameInfo);
+env()->allocate(alloc_size, (unsigned char **)&_stack_info);
+// pointers to move through the newly allocated space as it is filled in
+jvmtiStackInfo *si = _stack_info + thread_count;      // bottom of stack info
+jvmtiFrameInfo *fi = (jvmtiFrameInfo *)si;            // is the top of frame info
+// copy information in resource area into allocated buffer
+// insert stack info backwards since linked list is backwards
+// insert frame info forwards
+// walk the StackInfoNodes
+for (struct StackInfoNode *sin = head(); sin != NULL; sin = sin->next) {
+jint frame_count = sin->info.frame_count;
+size_t frames_size = frame_count * sizeof(jvmtiFrameInfo);
+--si;
+memcpy(si, &(sin->info), sizeof(jvmtiStackInfo));
+if (frames_size == 0) {
+si->frame_buffer = NULL;
+} else {
+memcpy(fi, sin->info.frame_buffer, frames_size);
+si->frame_buffer = fi;  // point to the new allocated copy of the frames
+fi += frame_count;
+}
+}
+assert(si == _stack_info, "the last copied stack info must be the first record");
+assert((unsigned char *)fi == ((unsigned char *)_stack_info) + alloc_size,
+"the last copied frame info must be the last record");
+}
+void
+VM_GetThreadListStackTraces::doit() {
+assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
+ResourceMark rm;
+for (int i = 0; i < _thread_count; ++i) {
+jthread jt = _thread_list[i];
+oop thread_oop = JNIHandles::resolve_external_guard(jt);
+if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::thread_klass())) {
+set_result(JVMTI_ERROR_INVALID_THREAD);
+return;
+}
+fill_frames(jt, java_lang_Thread::thread(thread_oop), thread_oop);
+}
+allocate_and_fill_stacks(_thread_count);
+}
+void
+VM_GetAllStackTraces::doit() {
+assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
+ResourceMark rm;
+_final_thread_count = 0;
+for (JavaThread *jt = Threads::first(); jt != NULL; jt = jt->next()) {
+oop thread_oop = jt->threadObj();
+if (thread_oop != NULL &&
+!jt->is_exiting() &&
+java_lang_Thread::is_alive(thread_oop) &&
+!jt->is_hidden_from_external_view()) {
+++_final_thread_count;
+// Handle block of the calling thread is used to create local refs.
+fill_frames((jthread)JNIHandles::make_local(_calling_thread, thread_oop),
+jt, thread_oop);
+}
+}
+allocate_and_fill_stacks(_final_thread_count);
+}
+// Verifies that the top frame is a java frame in an expected state.
+// Deoptimizes frame if needed.
+// Checks that the frame method signature matches the return type (tos).
+// HandleMark must be defined in the caller only.
+// It is to keep a ret_ob_h handle alive after return to the caller.
+jvmtiError
+JvmtiEnvBase::check_top_frame(JavaThread* current_thread, JavaThread* java_thread,
+jvalue value, TosState tos, Handle* ret_ob_h) {
+ResourceMark rm(current_thread);
+vframe *vf = vframeFor(java_thread, 0);
+NULL_CHECK(vf, JVMTI_ERROR_NO_MORE_FRAMES);
+javaVFrame *jvf = (javaVFrame*) vf;
+if (!vf->is_java_frame() || jvf->method()->is_native()) {
+return JVMTI_ERROR_OPAQUE_FRAME;
+}
+// If the frame is a compiled one, need to deoptimize it.
+if (vf->is_compiled_frame()) {
+if (!vf->fr().can_be_deoptimized()) {
+return JVMTI_ERROR_OPAQUE_FRAME;
+}
+VM_DeoptimizeFrame deopt(java_thread, jvf->fr().id());
+VMThread::execute(&deopt);
+}
+// Get information about method return type
+symbolHandle signature(current_thread, jvf->method()->signature());
+ResultTypeFinder rtf(signature);
+TosState fr_tos = as_TosState(rtf.type());
+if (fr_tos != tos) {
+if (tos != itos || (fr_tos != btos && fr_tos != ctos && fr_tos != stos)) {
+return JVMTI_ERROR_TYPE_MISMATCH;
+}
+}
+// Check that the jobject class matches the return type signature.
+jobject jobj = value.l;
+if (tos == atos && jobj != NULL) { // NULL reference is allowed
+Handle ob_h = Handle(current_thread, JNIHandles::resolve_external_guard(jobj));
+NULL_CHECK(ob_h, JVMTI_ERROR_INVALID_OBJECT);
+KlassHandle ob_kh = KlassHandle(current_thread, ob_h()->klass());
+NULL_CHECK(ob_kh, JVMTI_ERROR_INVALID_OBJECT);
+// Method return type signature.
+char* ty_sign = 1 + strchr(signature->as_C_string(), ')');
+if (!VM_GetOrSetLocal::is_assignable(ty_sign, Klass::cast(ob_kh()), current_thread)) {
+return JVMTI_ERROR_TYPE_MISMATCH;
+}
+*ret_ob_h = ob_h;
+}
+return JVMTI_ERROR_NONE;
+} /* end check_top_frame */
+// ForceEarlyReturn<type> follows the PopFrame approach in many aspects.
+// Main difference is on the last stage in the interpreter.
+// The PopFrame stops method execution to continue execution
+// from the same method call instruction.
+// The ForceEarlyReturn forces return from method so the execution
+// continues at the bytecode following the method call.
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+jvmtiError
+JvmtiEnvBase::force_early_return(JavaThread* java_thread, jvalue value, TosState tos) {
+JavaThread* current_thread = JavaThread::current();
+HandleMark   hm(current_thread);
+uint32_t debug_bits = 0;
+// Check if java_thread is fully suspended
+if (!is_thread_fully_suspended(java_thread,
+true /* wait for suspend completion */,
+&debug_bits)) {
+return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
+}
+// retreive or create the state
+JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
+// Check to see if a ForceEarlyReturn was already in progress
+if (state->is_earlyret_pending()) {
+// Probably possible for JVMTI clients to trigger this, but the
+// JPDA backend shouldn't allow this to happen
+return JVMTI_ERROR_INTERNAL;
+}
+{
+// The same as for PopFrame. Workaround bug:
+//  4812902: popFrame hangs if the method is waiting at a synchronize
+// Catch this condition and return an error to avoid hanging.
+// Now JVMTI spec allows an implementation to bail out with an opaque
+// frame error.
+OSThread* osThread = java_thread->osthread();
+if (osThread->get_state() == MONITOR_WAIT) {
+return JVMTI_ERROR_OPAQUE_FRAME;
+}
+}
+Handle ret_ob_h = Handle();
+jvmtiError err = check_top_frame(current_thread, java_thread, value, tos, &ret_ob_h);
+if (err != JVMTI_ERROR_NONE) {
+return err;
+}
+assert(tos != atos || value.l == NULL || ret_ob_h() != NULL,
+"return object oop must not be NULL if jobject is not NULL");
+// Update the thread state to reflect that the top frame must be
+// forced to return.
+// The current frame will be returned later when the suspended
+// thread is resumed and right before returning from VM to Java.
+// (see call_VM_base() in assembler_<cpu>.cpp).
+state->set_earlyret_pending();
+state->set_earlyret_oop(ret_ob_h());
+state->set_earlyret_value(value, tos);
+// Set pending step flag for this early return.
+// It is cleared when next step event is posted.
+state->set_pending_step_for_earlyret();
+return JVMTI_ERROR_NONE;
+} /* end force_early_return */
+void
+JvmtiMonitorClosure::do_monitor(ObjectMonitor* mon) {
+if ( _error != JVMTI_ERROR_NONE) {
+// Error occurred in previous iteration so no need to add
+// to the list.
+return;
+}
+if (mon->owner() == _java_thread ) {
+// Filter out on stack monitors collected during stack walk.
+oop obj = (oop)mon->object();
+bool found = false;
+for (int j = 0; j < _owned_monitors_list->length(); j++) {
+jobject jobj = ((jvmtiMonitorStackDepthInfo*)_owned_monitors_list->at(j))->monitor;
+oop check = JNIHandles::resolve(jobj);
+if (check == obj) {
+// On stack monitor already collected during the stack walk.
+found = true;
+break;
+}
+}
+if (found == false) {
+// This is off stack monitor (e.g. acquired via jni MonitorEnter).
+jvmtiError err;
+jvmtiMonitorStackDepthInfo *jmsdi;
+err = _env->allocate(sizeof(jvmtiMonitorStackDepthInfo), (unsigned char **)&jmsdi);
+if (err != JVMTI_ERROR_NONE) {
+_error = err;
+return;
+}
+Handle hobj(obj);
+jmsdi->monitor = _env->jni_reference(_calling_thread, hobj);
+// stack depth is unknown for this monitor.
+jmsdi->stack_depth = -1;
+_owned_monitors_list->append(jmsdi);
+}
+}
+}
+#endif // !JVMTI_KERNEL

Mercurial > hg > truffle

comparison src/share/vm/prims/jvmtiEnvBase.cpp @ 0:a61af66fc99e jdk7-b24