--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/services/management.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,2019 @@
+/*
+ * 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/_management.cpp.incl"
+
+PerfVariable* Management::_begin_vm_creation_time = NULL;
+PerfVariable* Management::_end_vm_creation_time = NULL;
+PerfVariable* Management::_vm_init_done_time = NULL;
+
+klassOop Management::_sensor_klass = NULL;
+klassOop Management::_threadInfo_klass = NULL;
+klassOop Management::_memoryUsage_klass = NULL;
+klassOop Management::_memoryPoolMXBean_klass = NULL;
+klassOop Management::_memoryManagerMXBean_klass = NULL;
+klassOop Management::_garbageCollectorMXBean_klass = NULL;
+klassOop Management::_managementFactory_klass = NULL;
+
+jmmOptionalSupport Management::_optional_support = {0};
+TimeStamp Management::_stamp;
+
+void management_init() {
+ Management::init();
+ ThreadService::init();
+ RuntimeService::init();
+ ClassLoadingService::init();
+}
+
+void Management::init() {
+ EXCEPTION_MARK;
+
+ // These counters are for java.lang.management API support.
+ // They are created even if -XX:-UsePerfData is set and in
+ // that case, they will be allocated on C heap.
+
+ _begin_vm_creation_time =
+ PerfDataManager::create_variable(SUN_RT, "createVmBeginTime",
+ PerfData::U_None, CHECK);
+
+ _end_vm_creation_time =
+ PerfDataManager::create_variable(SUN_RT, "createVmEndTime",
+ PerfData::U_None, CHECK);
+
+ _vm_init_done_time =
+ PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime",
+ PerfData::U_None, CHECK);
+
+ // Initialize optional support
+ _optional_support.isLowMemoryDetectionSupported = 1;
+ _optional_support.isCompilationTimeMonitoringSupported = 1;
+ _optional_support.isThreadContentionMonitoringSupported = 1;
+
+ if (os::is_thread_cpu_time_supported()) {
+ _optional_support.isCurrentThreadCpuTimeSupported = 1;
+ _optional_support.isOtherThreadCpuTimeSupported = 1;
+ } else {
+ _optional_support.isCurrentThreadCpuTimeSupported = 0;
+ _optional_support.isOtherThreadCpuTimeSupported = 0;
+ }
+ _optional_support.isBootClassPathSupported = 1;
+ _optional_support.isObjectMonitorUsageSupported = 1;
+#ifndef SERVICES_KERNEL
+ // This depends on the heap inspector
+ _optional_support.isSynchronizerUsageSupported = 1;
+#endif // SERVICES_KERNEL
+}
+
+void Management::initialize(TRAPS) {
+ // Start the low memory detector thread
+ LowMemoryDetector::initialize();
+
+ if (ManagementServer) {
+ ResourceMark rm(THREAD);
+ HandleMark hm(THREAD);
+
+ // Load and initialize the sun.management.Agent class
+ // invoke startAgent method to start the management server
+ Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
+ klassOop k = SystemDictionary::resolve_or_fail(vmSymbolHandles::sun_management_Agent(),
+ loader,
+ Handle(),
+ true,
+ CHECK);
+ instanceKlassHandle ik (THREAD, k);
+
+ JavaValue result(T_VOID);
+ JavaCalls::call_static(&result,
+ ik,
+ vmSymbolHandles::startAgent_name(),
+ vmSymbolHandles::void_method_signature(),
+ CHECK);
+ }
+}
+
+void Management::get_optional_support(jmmOptionalSupport* support) {
+ memcpy(support, &_optional_support, sizeof(jmmOptionalSupport));
+}
+
+klassOop Management::load_and_initialize_klass(symbolHandle sh, TRAPS) {
+ klassOop k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL);
+ instanceKlassHandle ik (THREAD, k);
+ if (ik->should_be_initialized()) {
+ ik->initialize(CHECK_NULL);
+ }
+ return ik();
+}
+
+void Management::record_vm_startup_time(jlong begin, jlong duration) {
+ // if the performance counter is not initialized,
+ // then vm initialization failed; simply return.
+ if (_begin_vm_creation_time == NULL) return;
+
+ _begin_vm_creation_time->set_value(begin);
+ _end_vm_creation_time->set_value(begin + duration);
+ PerfMemory::set_accessible(true);
+}
+
+jlong Management::timestamp() {
+ TimeStamp t;
+ t.update();
+ return t.ticks() - _stamp.ticks();
+}
+
+void Management::oops_do(OopClosure* f) {
+ MemoryService::oops_do(f);
+ ThreadService::oops_do(f);
+
+ f->do_oop((oop*) &_sensor_klass);
+ f->do_oop((oop*) &_threadInfo_klass);
+ f->do_oop((oop*) &_memoryUsage_klass);
+ f->do_oop((oop*) &_memoryPoolMXBean_klass);
+ f->do_oop((oop*) &_memoryManagerMXBean_klass);
+ f->do_oop((oop*) &_garbageCollectorMXBean_klass);
+ f->do_oop((oop*) &_managementFactory_klass);
+}
+
+klassOop Management::java_lang_management_ThreadInfo_klass(TRAPS) {
+ if (_threadInfo_klass == NULL) {
+ _threadInfo_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_ThreadInfo(), CHECK_NULL);
+ }
+ return _threadInfo_klass;
+}
+
+klassOop Management::java_lang_management_MemoryUsage_klass(TRAPS) {
+ if (_memoryUsage_klass == NULL) {
+ _memoryUsage_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryUsage(), CHECK_NULL);
+ }
+ return _memoryUsage_klass;
+}
+
+klassOop Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) {
+ if (_memoryPoolMXBean_klass == NULL) {
+ _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryPoolMXBean(), CHECK_NULL);
+ }
+ return _memoryPoolMXBean_klass;
+}
+
+klassOop Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) {
+ if (_memoryManagerMXBean_klass == NULL) {
+ _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryManagerMXBean(), CHECK_NULL);
+ }
+ return _memoryManagerMXBean_klass;
+}
+
+klassOop Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) {
+ if (_garbageCollectorMXBean_klass == NULL) {
+ _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL);
+ }
+ return _garbageCollectorMXBean_klass;
+}
+
+klassOop Management::sun_management_Sensor_klass(TRAPS) {
+ if (_sensor_klass == NULL) {
+ _sensor_klass = load_and_initialize_klass(vmSymbolHandles::sun_management_Sensor(), CHECK_NULL);
+ }
+ return _sensor_klass;
+}
+
+klassOop Management::sun_management_ManagementFactory_klass(TRAPS) {
+ if (_managementFactory_klass == NULL) {
+ _managementFactory_klass = load_and_initialize_klass(vmSymbolHandles::sun_management_ManagementFactory(), CHECK_NULL);
+ }
+ return _managementFactory_klass;
+}
+
+static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) {
+ Handle snapshot_thread(THREAD, snapshot->threadObj());
+
+ jlong contended_time;
+ jlong waited_time;
+ if (ThreadService::is_thread_monitoring_contention()) {
+ contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks());
+ waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks());
+ } else {
+ // set them to -1 if thread contention monitoring is disabled.
+ contended_time = max_julong;
+ waited_time = max_julong;
+ }
+
+ int thread_status = snapshot->thread_status();
+ assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object");
+ if (snapshot->is_ext_suspended()) {
+ thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED;
+ }
+ if (snapshot->is_in_native()) {
+ thread_status |= JMM_THREAD_STATE_FLAG_NATIVE;
+ }
+
+ ThreadStackTrace* st = snapshot->get_stack_trace();
+ Handle stacktrace_h;
+ if (st != NULL) {
+ stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK);
+ } else {
+ stacktrace_h = Handle();
+ }
+
+ args->push_oop(snapshot_thread);
+ args->push_int(thread_status);
+ args->push_oop(Handle(THREAD, snapshot->blocker_object()));
+ args->push_oop(Handle(THREAD, snapshot->blocker_object_owner()));
+ args->push_long(snapshot->contended_enter_count());
+ args->push_long(contended_time);
+ args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count());
+ args->push_long(waited_time);
+ args->push_oop(stacktrace_h);
+}
+
+// Helper function to construct a ThreadInfo object
+instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) {
+ klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
+ instanceKlassHandle ik (THREAD, k);
+
+ JavaValue result(T_VOID);
+ JavaCallArguments args(14);
+
+ // First allocate a ThreadObj object and
+ // push the receiver as the first argument
+ Handle element = ik->allocate_instance_handle(CHECK_NULL);
+ args.push_oop(element);
+
+ // initialize the arguments for the ThreadInfo constructor
+ initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
+
+ // Call ThreadInfo constructor with no locked monitors and synchronizers
+ JavaCalls::call_special(&result,
+ ik,
+ vmSymbolHandles::object_initializer_name(),
+ vmSymbolHandles::java_lang_management_ThreadInfo_constructor_signature(),
+ &args,
+ CHECK_NULL);
+
+ return (instanceOop) element();
+}
+
+instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot,
+ objArrayHandle monitors_array,
+ typeArrayHandle depths_array,
+ objArrayHandle synchronizers_array,
+ TRAPS) {
+ klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
+ instanceKlassHandle ik (THREAD, k);
+
+ JavaValue result(T_VOID);
+ JavaCallArguments args(17);
+
+ // First allocate a ThreadObj object and
+ // push the receiver as the first argument
+ Handle element = ik->allocate_instance_handle(CHECK_NULL);
+ args.push_oop(element);
+
+ // initialize the arguments for the ThreadInfo constructor
+ initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
+
+ // push the locked monitors and synchronizers in the arguments
+ args.push_oop(monitors_array);
+ args.push_oop(depths_array);
+ args.push_oop(synchronizers_array);
+
+ // Call ThreadInfo constructor with locked monitors and synchronizers
+ JavaCalls::call_special(&result,
+ ik,
+ vmSymbolHandles::object_initializer_name(),
+ vmSymbolHandles::java_lang_management_ThreadInfo_with_locks_constructor_signature(),
+ &args,
+ CHECK_NULL);
+
+ return (instanceOop) element();
+}
+
+// Helper functions
+static JavaThread* find_java_thread_from_id(jlong thread_id) {
+ assert(Threads_lock->owned_by_self(), "Must hold Threads_lock");
+
+ JavaThread* java_thread = NULL;
+ // Sequential search for now. Need to do better optimization later.
+ for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) {
+ oop tobj = thread->threadObj();
+ if (!thread->is_exiting() &&
+ tobj != NULL &&
+ thread_id == java_lang_Thread::thread_id(tobj)) {
+ java_thread = thread;
+ break;
+ }
+ }
+ return java_thread;
+}
+
+static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) {
+ if (mgr == NULL) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
+ }
+ oop mgr_obj = JNIHandles::resolve(mgr);
+ instanceHandle h(THREAD, (instanceOop) mgr_obj);
+
+ klassOop k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL);
+ if (!h->is_a(k)) {
+ THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+ "the object is not an instance of java.lang.management.GarbageCollectorMXBean class",
+ NULL);
+ }
+
+ MemoryManager* gc = MemoryService::get_memory_manager(h);
+ if (gc == NULL || !gc->is_gc_memory_manager()) {
+ THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+ "Invalid GC memory manager",
+ NULL);
+ }
+ return (GCMemoryManager*) gc;
+}
+
+static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) {
+ if (obj == NULL) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
+ }
+
+ oop pool_obj = JNIHandles::resolve(obj);
+ assert(pool_obj->is_instance(), "Should be an instanceOop");
+ instanceHandle ph(THREAD, (instanceOop) pool_obj);
+
+ return MemoryService::get_memory_pool(ph);
+}
+
+static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) {
+ int num_threads = ids_ah->length();
+ // should be non-empty array
+ if (num_threads == 0) {
+ THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
+ "Empty array of thread IDs");
+ }
+
+ // Validate input thread IDs
+ int i = 0;
+ for (i = 0; i < num_threads; i++) {
+ jlong tid = ids_ah->long_at(i);
+ if (tid <= 0) {
+ // throw exception if invalid thread id.
+ THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
+ "Invalid thread ID entry");
+ }
+ }
+
+}
+
+static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) {
+
+ // check if the element of infoArray is of type ThreadInfo class
+ klassOop threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK);
+ klassOop element_klass = objArrayKlass::cast(infoArray_h->klass())->element_klass();
+ if (element_klass != threadinfo_klass) {
+ THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
+ "infoArray element type is not ThreadInfo class");
+ }
+
+}
+
+
+static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) {
+ if (obj == NULL) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
+ }
+
+ oop mgr_obj = JNIHandles::resolve(obj);
+ assert(mgr_obj->is_instance(), "Should be an instanceOop");
+ instanceHandle mh(THREAD, (instanceOop) mgr_obj);
+
+ return MemoryService::get_memory_manager(mh);
+}
+
+// Returns a version string and sets major and minor version if
+// the input parameters are non-null.
+JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env))
+ return JMM_VERSION;
+JVM_END
+
+// Gets the list of VM monitoring and management optional supports
+// Returns 0 if succeeded; otherwise returns non-zero.
+JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support))
+ if (support == NULL) {
+ return -1;
+ }
+ Management::get_optional_support(support);
+ return 0;
+JVM_END
+
+// Returns a java.lang.String object containing the input arguments to the VM.
+JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env))
+ ResourceMark rm(THREAD);
+
+ if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
+ return NULL;
+ }
+
+ char** vm_flags = Arguments::jvm_flags_array();
+ char** vm_args = Arguments::jvm_args_array();
+ int num_flags = Arguments::num_jvm_flags();
+ int num_args = Arguments::num_jvm_args();
+
+ size_t length = 1; // null terminator
+ int i;
+ for (i = 0; i < num_flags; i++) {
+ length += strlen(vm_flags[i]);
+ }
+ for (i = 0; i < num_args; i++) {
+ length += strlen(vm_args[i]);
+ }
+ // add a space between each argument
+ length += num_flags + num_args - 1;
+
+ // Return the list of input arguments passed to the VM
+ // and preserve the order that the VM processes.
+ char* args = NEW_RESOURCE_ARRAY(char, length);
+ args[0] = '\0';
+ // concatenate all jvm_flags
+ if (num_flags > 0) {
+ strcat(args, vm_flags[0]);
+ for (i = 1; i < num_flags; i++) {
+ strcat(args, " ");
+ strcat(args, vm_flags[i]);
+ }
+ }
+
+ if (num_args > 0 && num_flags > 0) {
+ // append a space if args already contains one or more jvm_flags
+ strcat(args, " ");
+ }
+
+ // concatenate all jvm_args
+ if (num_args > 0) {
+ strcat(args, vm_args[0]);
+ for (i = 1; i < num_args; i++) {
+ strcat(args, " ");
+ strcat(args, vm_args[i]);
+ }
+ }
+
+ Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL);
+ return JNIHandles::make_local(env, hargs());
+JVM_END
+
+// Returns an array of java.lang.String object containing the input arguments to the VM.
+JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env))
+ ResourceMark rm(THREAD);
+
+ if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
+ return NULL;
+ }
+
+ char** vm_flags = Arguments::jvm_flags_array();
+ char** vm_args = Arguments::jvm_args_array();
+ int num_flags = Arguments::num_jvm_flags();
+ int num_args = Arguments::num_jvm_args();
+
+ instanceKlassHandle ik (THREAD, SystemDictionary::string_klass());
+ objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL);
+ objArrayHandle result_h(THREAD, r);
+
+ int index = 0;
+ for (int j = 0; j < num_flags; j++, index++) {
+ Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
+ result_h->obj_at_put(index, h());
+ }
+ for (int i = 0; i < num_args; i++, index++) {
+ Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
+ result_h->obj_at_put(index, h());
+ }
+ return (jobjectArray) JNIHandles::make_local(env, result_h());
+JVM_END
+
+// Returns an array of java/lang/management/MemoryPoolMXBean object
+// one for each memory pool if obj == null; otherwise returns
+// an array of memory pools for a given memory manager if
+// it is a valid memory manager.
+JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj))
+ ResourceMark rm(THREAD);
+
+ int num_memory_pools;
+ MemoryManager* mgr = NULL;
+ if (obj == NULL) {
+ num_memory_pools = MemoryService::num_memory_pools();
+ } else {
+ mgr = get_memory_manager_from_jobject(obj, CHECK_NULL);
+ if (mgr == NULL) {
+ return NULL;
+ }
+ num_memory_pools = mgr->num_memory_pools();
+ }
+
+ // Allocate the resulting MemoryPoolMXBean[] object
+ klassOop k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL);
+ instanceKlassHandle ik (THREAD, k);
+ objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL);
+ objArrayHandle poolArray(THREAD, r);
+
+ if (mgr == NULL) {
+ // Get all memory pools
+ for (int i = 0; i < num_memory_pools; i++) {
+ MemoryPool* pool = MemoryService::get_memory_pool(i);
+ instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
+ instanceHandle ph(THREAD, p);
+ poolArray->obj_at_put(i, ph());
+ }
+ } else {
+ // Get memory pools managed by a given memory manager
+ for (int i = 0; i < num_memory_pools; i++) {
+ MemoryPool* pool = mgr->get_memory_pool(i);
+ instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
+ instanceHandle ph(THREAD, p);
+ poolArray->obj_at_put(i, ph());
+ }
+ }
+ return (jobjectArray) JNIHandles::make_local(env, poolArray());
+JVM_END
+
+// Returns an array of java/lang/management/MemoryManagerMXBean object
+// one for each memory manager if obj == null; otherwise returns
+// an array of memory managers for a given memory pool if
+// it is a valid memory pool.
+JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj))
+ ResourceMark rm(THREAD);
+
+ int num_mgrs;
+ MemoryPool* pool = NULL;
+ if (obj == NULL) {
+ num_mgrs = MemoryService::num_memory_managers();
+ } else {
+ pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
+ if (pool == NULL) {
+ return NULL;
+ }
+ num_mgrs = pool->num_memory_managers();
+ }
+
+ // Allocate the resulting MemoryManagerMXBean[] object
+ klassOop k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL);
+ instanceKlassHandle ik (THREAD, k);
+ objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL);
+ objArrayHandle mgrArray(THREAD, r);
+
+ if (pool == NULL) {
+ // Get all memory managers
+ for (int i = 0; i < num_mgrs; i++) {
+ MemoryManager* mgr = MemoryService::get_memory_manager(i);
+ instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
+ instanceHandle ph(THREAD, p);
+ mgrArray->obj_at_put(i, ph());
+ }
+ } else {
+ // Get memory managers for a given memory pool
+ for (int i = 0; i < num_mgrs; i++) {
+ MemoryManager* mgr = pool->get_memory_manager(i);
+ instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
+ instanceHandle ph(THREAD, p);
+ mgrArray->obj_at_put(i, ph());
+ }
+ }
+ return (jobjectArray) JNIHandles::make_local(env, mgrArray());
+JVM_END
+
+
+// Returns a java/lang/management/MemoryUsage object containing the memory usage
+// of a given memory pool.
+JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj))
+ ResourceMark rm(THREAD);
+
+ MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
+ if (pool != NULL) {
+ MemoryUsage usage = pool->get_memory_usage();
+ Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
+ return JNIHandles::make_local(env, h());
+ } else {
+ return NULL;
+ }
+JVM_END
+
+// Returns a java/lang/management/MemoryUsage object containing the memory usage
+// of a given memory pool.
+JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj))
+ ResourceMark rm(THREAD);
+
+ MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
+ if (pool != NULL) {
+ MemoryUsage usage = pool->get_peak_memory_usage();
+ Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
+ return JNIHandles::make_local(env, h());
+ } else {
+ return NULL;
+ }
+JVM_END
+
+// Returns a java/lang/management/MemoryUsage object containing the memory usage
+// of a given memory pool after most recent GC.
+JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj))
+ ResourceMark rm(THREAD);
+
+ MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
+ if (pool != NULL && pool->is_collected_pool()) {
+ MemoryUsage usage = pool->get_last_collection_usage();
+ Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
+ return JNIHandles::make_local(env, h());
+ } else {
+ return NULL;
+ }
+JVM_END
+
+// Sets the memory pool sensor for a threshold type
+JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj))
+ if (obj == NULL || sensorObj == NULL) {
+ THROW(vmSymbols::java_lang_NullPointerException());
+ }
+
+ klassOop sensor_klass = Management::sun_management_Sensor_klass(CHECK);
+ oop s = JNIHandles::resolve(sensorObj);
+ assert(s->is_instance(), "Sensor should be an instanceOop");
+ instanceHandle sensor_h(THREAD, (instanceOop) s);
+ if (!sensor_h->is_a(sensor_klass)) {
+ THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
+ "Sensor is not an instance of sun.management.Sensor class");
+ }
+
+ MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK);
+ assert(mpool != NULL, "MemoryPool should exist");
+
+ switch (type) {
+ case JMM_USAGE_THRESHOLD_HIGH:
+ case JMM_USAGE_THRESHOLD_LOW:
+ // have only one sensor for threshold high and low
+ mpool->set_usage_sensor_obj(sensor_h);
+ break;
+ case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
+ case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
+ // have only one sensor for threshold high and low
+ mpool->set_gc_usage_sensor_obj(sensor_h);
+ break;
+ default:
+ assert(false, "Unrecognized type");
+ }
+
+JVM_END
+
+
+// Sets the threshold of a given memory pool.
+// Returns the previous threshold.
+//
+// Input parameters:
+// pool - the MemoryPoolMXBean object
+// type - threshold type
+// threshold - the new threshold (must not be negative)
+//
+JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold))
+ if (threshold < 0) {
+ THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+ "Invalid threshold value",
+ -1);
+ }
+
+ if (threshold > max_intx) {
+ THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+ "Invalid threshold value > max value of size_t",
+ -1);
+ }
+
+ MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L));
+ assert(pool != NULL, "MemoryPool should exist");
+
+ jlong prev = 0;
+ switch (type) {
+ case JMM_USAGE_THRESHOLD_HIGH:
+ if (!pool->usage_threshold()->is_high_threshold_supported()) {
+ return -1;
+ }
+ prev = pool->usage_threshold()->set_high_threshold((size_t) threshold);
+ break;
+
+ case JMM_USAGE_THRESHOLD_LOW:
+ if (!pool->usage_threshold()->is_low_threshold_supported()) {
+ return -1;
+ }
+ prev = pool->usage_threshold()->set_low_threshold((size_t) threshold);
+ break;
+
+ case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
+ if (!pool->gc_usage_threshold()->is_high_threshold_supported()) {
+ return -1;
+ }
+ // return and the new threshold is effective for the next GC
+ return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold);
+
+ case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
+ if (!pool->gc_usage_threshold()->is_low_threshold_supported()) {
+ return -1;
+ }
+ // return and the new threshold is effective for the next GC
+ return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold);
+
+ default:
+ assert(false, "Unrecognized type");
+ return -1;
+ }
+
+ // When the threshold is changed, reevaluate if the low memory
+ // detection is enabled.
+ if (prev != threshold) {
+ LowMemoryDetector::recompute_enabled_for_collected_pools();
+ LowMemoryDetector::detect_low_memory(pool);
+ }
+ return prev;
+JVM_END
+
+// Returns a java/lang/management/MemoryUsage object representing
+// the memory usage for the heap or non-heap memory.
+JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap))
+ ResourceMark rm(THREAD);
+
+ // Calculate the memory usage
+ size_t total_init = 0;
+ size_t total_used = 0;
+ size_t total_committed = 0;
+ size_t total_max = 0;
+ bool has_undefined_init_size = false;
+ bool has_undefined_max_size = false;
+
+ for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
+ MemoryPool* pool = MemoryService::get_memory_pool(i);
+ if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) {
+ MemoryUsage u = pool->get_memory_usage();
+ total_used += u.used();
+ total_committed += u.committed();
+
+ // if any one of the memory pool has undefined init_size or max_size,
+ // set it to -1
+ if (u.init_size() == (size_t)-1) {
+ has_undefined_init_size = true;
+ }
+ if (!has_undefined_init_size) {
+ total_init += u.init_size();
+ }
+
+ if (u.max_size() == (size_t)-1) {
+ has_undefined_max_size = true;
+ }
+ if (!has_undefined_max_size) {
+ total_max += u.max_size();
+ }
+ }
+ }
+
+ // In our current implementation, all pools should have
+ // defined init and max size
+ assert(!has_undefined_init_size, "Undefined init size");
+ assert(!has_undefined_max_size, "Undefined max size");
+
+ MemoryUsage usage((heap ? Arguments::initial_heap_size() : total_init),
+ total_used,
+ total_committed,
+ (heap ? Universe::heap()->max_capacity() : total_max));
+
+ Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
+ return JNIHandles::make_local(env, obj());
+JVM_END
+
+// Returns the boolean value of a given attribute.
+JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att))
+ switch (att) {
+ case JMM_VERBOSE_GC:
+ return MemoryService::get_verbose();
+ case JMM_VERBOSE_CLASS:
+ return ClassLoadingService::get_verbose();
+ case JMM_THREAD_CONTENTION_MONITORING:
+ return ThreadService::is_thread_monitoring_contention();
+ case JMM_THREAD_CPU_TIME:
+ return ThreadService::is_thread_cpu_time_enabled();
+ default:
+ assert(0, "Unrecognized attribute");
+ return false;
+ }
+JVM_END
+
+// Sets the given boolean attribute and returns the previous value.
+JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag))
+ switch (att) {
+ case JMM_VERBOSE_GC:
+ return MemoryService::set_verbose(flag != 0);
+ case JMM_VERBOSE_CLASS:
+ return ClassLoadingService::set_verbose(flag != 0);
+ case JMM_THREAD_CONTENTION_MONITORING:
+ return ThreadService::set_thread_monitoring_contention(flag != 0);
+ case JMM_THREAD_CPU_TIME:
+ return ThreadService::set_thread_cpu_time_enabled(flag != 0);
+ default:
+ assert(0, "Unrecognized attribute");
+ return false;
+ }
+JVM_END
+
+
+static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) {
+ switch (att) {
+ case JMM_GC_TIME_MS:
+ return mgr->gc_time_ms();
+
+ case JMM_GC_COUNT:
+ return mgr->gc_count();
+
+ case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE:
+ // current implementation only has 1 ext attribute
+ return 1;
+
+ default:
+ assert(0, "Unrecognized GC attribute");
+ return -1;
+ }
+}
+
+class VmThreadCountClosure: public ThreadClosure {
+ private:
+ int _count;
+ public:
+ VmThreadCountClosure() : _count(0) {};
+ void do_thread(Thread* thread);
+ int count() { return _count; }
+};
+
+void VmThreadCountClosure::do_thread(Thread* thread) {
+ // exclude externally visible JavaThreads
+ if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
+ return;
+ }
+
+ _count++;
+}
+
+static jint get_vm_thread_count() {
+ VmThreadCountClosure vmtcc;
+ {
+ MutexLockerEx ml(Threads_lock);
+ Threads::threads_do(&vmtcc);
+ }
+
+ return vmtcc.count();
+}
+
+static jint get_num_flags() {
+ // last flag entry is always NULL, so subtract 1
+ int nFlags = (int) Flag::numFlags - 1;
+ int count = 0;
+ for (int i = 0; i < nFlags; i++) {
+ Flag* flag = &Flag::flags[i];
+ // Exclude the diagnostic flags
+ if (flag->is_unlocked() || flag->is_unlocker()) {
+ count++;
+ }
+ }
+ return count;
+}
+
+static jlong get_long_attribute(jmmLongAttribute att) {
+ switch (att) {
+ case JMM_CLASS_LOADED_COUNT:
+ return ClassLoadingService::loaded_class_count();
+
+ case JMM_CLASS_UNLOADED_COUNT:
+ return ClassLoadingService::unloaded_class_count();
+
+ case JMM_THREAD_TOTAL_COUNT:
+ return ThreadService::get_total_thread_count();
+
+ case JMM_THREAD_LIVE_COUNT:
+ return ThreadService::get_live_thread_count();
+
+ case JMM_THREAD_PEAK_COUNT:
+ return ThreadService::get_peak_thread_count();
+
+ case JMM_THREAD_DAEMON_COUNT:
+ return ThreadService::get_daemon_thread_count();
+
+ case JMM_JVM_INIT_DONE_TIME_MS:
+ return Management::vm_init_done_time();
+
+ case JMM_COMPILE_TOTAL_TIME_MS:
+ return Management::ticks_to_ms(CompileBroker::total_compilation_ticks());
+
+ case JMM_OS_PROCESS_ID:
+ return os::current_process_id();
+
+ // Hotspot-specific counters
+ case JMM_CLASS_LOADED_BYTES:
+ return ClassLoadingService::loaded_class_bytes();
+
+ case JMM_CLASS_UNLOADED_BYTES:
+ return ClassLoadingService::unloaded_class_bytes();
+
+ case JMM_SHARED_CLASS_LOADED_COUNT:
+ return ClassLoadingService::loaded_shared_class_count();
+
+ case JMM_SHARED_CLASS_UNLOADED_COUNT:
+ return ClassLoadingService::unloaded_shared_class_count();
+
+
+ case JMM_SHARED_CLASS_LOADED_BYTES:
+ return ClassLoadingService::loaded_shared_class_bytes();
+
+ case JMM_SHARED_CLASS_UNLOADED_BYTES:
+ return ClassLoadingService::unloaded_shared_class_bytes();
+
+ case JMM_TOTAL_CLASSLOAD_TIME_MS:
+ return ClassLoader::classloader_time_ms();
+
+ case JMM_VM_GLOBAL_COUNT:
+ return get_num_flags();
+
+ case JMM_SAFEPOINT_COUNT:
+ return RuntimeService::safepoint_count();
+
+ case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS:
+ return RuntimeService::safepoint_sync_time_ms();
+
+ case JMM_TOTAL_STOPPED_TIME_MS:
+ return RuntimeService::safepoint_time_ms();
+
+ case JMM_TOTAL_APP_TIME_MS:
+ return RuntimeService::application_time_ms();
+
+ case JMM_VM_THREAD_COUNT:
+ return get_vm_thread_count();
+
+ case JMM_CLASS_INIT_TOTAL_COUNT:
+ return ClassLoader::class_init_count();
+
+ case JMM_CLASS_INIT_TOTAL_TIME_MS:
+ return ClassLoader::class_init_time_ms();
+
+ case JMM_CLASS_VERIFY_TOTAL_TIME_MS:
+ return ClassLoader::class_verify_time_ms();
+
+ case JMM_METHOD_DATA_SIZE_BYTES:
+ return ClassLoadingService::class_method_data_size();
+
+ case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES:
+ return os::physical_memory();
+
+ default:
+ return -1;
+ }
+}
+
+
+// Returns the long value of a given attribute.
+JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att))
+ if (obj == NULL) {
+ return get_long_attribute(att);
+ } else {
+ GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L));
+ if (mgr != NULL) {
+ return get_gc_attribute(mgr, att);
+ }
+ }
+ return -1;
+JVM_END
+
+// Gets the value of all attributes specified in the given array
+// and sets the value in the result array.
+// Returns the number of attributes found.
+JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env,
+ jobject obj,
+ jmmLongAttribute* atts,
+ jint count,
+ jlong* result))
+
+ int num_atts = 0;
+ if (obj == NULL) {
+ for (int i = 0; i < count; i++) {
+ result[i] = get_long_attribute(atts[i]);
+ if (result[i] != -1) {
+ num_atts++;
+ }
+ }
+ } else {
+ GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0);
+ for (int i = 0; i < count; i++) {
+ result[i] = get_gc_attribute(mgr, atts[i]);
+ if (result[i] != -1) {
+ num_atts++;
+ }
+ }
+ }
+ return num_atts;
+JVM_END
+
+// Helper function to do thread dump for a specific list of threads
+static void do_thread_dump(ThreadDumpResult* dump_result,
+ typeArrayHandle ids_ah, // array of thread ID (long[])
+ int num_threads,
+ int max_depth,
+ bool with_locked_monitors,
+ bool with_locked_synchronizers,
+ TRAPS) {
+
+ // First get an array of threadObj handles.
+ // A JavaThread may terminate before we get the stack trace.
+ GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
+ {
+ MutexLockerEx ml(Threads_lock);
+ for (int i = 0; i < num_threads; i++) {
+ jlong tid = ids_ah->long_at(i);
+ JavaThread* jt = find_java_thread_from_id(tid);
+ oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL);
+ instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj);
+ thread_handle_array->append(threadObj_h);
+ }
+ }
+
+ // Obtain thread dumps and thread snapshot information
+ VM_ThreadDump op(dump_result,
+ thread_handle_array,
+ num_threads,
+ max_depth, /* stack depth */
+ with_locked_monitors,
+ with_locked_synchronizers);
+ VMThread::execute(&op);
+}
+
+// Gets an array of ThreadInfo objects. Each element is the ThreadInfo
+// for the thread ID specified in the corresponding entry in
+// the given array of thread IDs; or NULL if the thread does not exist
+// or has terminated.
+//
+// Input parameters:
+// ids - array of thread IDs
+// maxDepth - the maximum depth of stack traces to be dumped:
+// maxDepth == -1 requests to dump entire stack trace.
+// maxDepth == 0 requests no stack trace.
+// infoArray - array of ThreadInfo objects
+//
+JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray))
+ // Check if threads is null
+ if (ids == NULL || infoArray == NULL) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), -1);
+ }
+
+ if (maxDepth < -1) {
+ THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+ "Invalid maxDepth", -1);
+ }
+
+ ResourceMark rm(THREAD);
+ typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
+ typeArrayHandle ids_ah(THREAD, ta);
+
+ oop infoArray_obj = JNIHandles::resolve_non_null(infoArray);
+ objArrayOop oa = objArrayOop(infoArray_obj);
+ objArrayHandle infoArray_h(THREAD, oa);
+
+ // validate the thread id array
+ validate_thread_id_array(ids_ah, CHECK_0);
+
+ // validate the ThreadInfo[] parameters
+ validate_thread_info_array(infoArray_h, CHECK_0);
+
+ // infoArray must be of the same length as the given array of thread IDs
+ int num_threads = ids_ah->length();
+ if (num_threads != infoArray_h->length()) {
+ THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+ "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1);
+ }
+
+ if (JDK_Version::is_gte_jdk16x_version()) {
+ // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
+ java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0);
+ }
+
+ // Must use ThreadDumpResult to store the ThreadSnapshot.
+ // GC may occur after the thread snapshots are taken but before
+ // this function returns. The threadObj and other oops kept
+ // in the ThreadSnapshot are marked and adjusted during GC.
+ ThreadDumpResult dump_result(num_threads);
+
+ if (maxDepth == 0) {
+ // no stack trace dumped - do not need to stop the world
+ {
+ MutexLockerEx ml(Threads_lock);
+ for (int i = 0; i < num_threads; i++) {
+ jlong tid = ids_ah->long_at(i);
+ JavaThread* jt = find_java_thread_from_id(tid);
+ ThreadSnapshot* ts;
+ if (jt == NULL) {
+ // if the thread does not exist or now it is terminated,
+ // create dummy snapshot
+ ts = new ThreadSnapshot();
+ } else {
+ ts = new ThreadSnapshot(jt);
+ }
+ dump_result.add_thread_snapshot(ts);
+ }
+ }
+ } else {
+ // obtain thread dump with the specific list of threads with stack trace
+
+ do_thread_dump(&dump_result,
+ ids_ah,
+ num_threads,
+ maxDepth,
+ false, /* no locked monitor */
+ false, /* no locked synchronizers */
+ CHECK_0);
+ }
+
+ int num_snapshots = dump_result.num_snapshots();
+ assert(num_snapshots == num_threads, "Must match the number of thread snapshots");
+ int index = 0;
+ for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) {
+ // For each thread, create an java/lang/management/ThreadInfo object
+ // and fill with the thread information
+
+ if (ts->threadObj() == NULL) {
+ // if the thread does not exist or now it is terminated, set threadinfo to NULL
+ infoArray_h->obj_at_put(index, NULL);
+ continue;
+ }
+
+ // Create java.lang.management.ThreadInfo object
+ instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0);
+ infoArray_h->obj_at_put(index, info_obj);
+ }
+ return 0;
+JVM_END
+
+// Dump thread info for the specified threads.
+// It returns an array of ThreadInfo objects. Each element is the ThreadInfo
+// for the thread ID specified in the corresponding entry in
+// the given array of thread IDs; or NULL if the thread does not exist
+// or has terminated.
+//
+// Input parameter:
+// ids - array of thread IDs; NULL indicates all live threads
+// locked_monitors - if true, dump locked object monitors
+// locked_synchronizers - if true, dump locked JSR-166 synchronizers
+//
+JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers))
+ ResourceMark rm(THREAD);
+
+ if (JDK_Version::is_gte_jdk16x_version()) {
+ // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
+ java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL);
+ }
+
+ typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids));
+ int num_threads = (ta != NULL ? ta->length() : 0);
+ typeArrayHandle ids_ah(THREAD, ta);
+
+ ThreadDumpResult dump_result(num_threads); // can safepoint
+
+ if (ids_ah() != NULL) {
+
+ // validate the thread id array
+ validate_thread_id_array(ids_ah, CHECK_NULL);
+
+ // obtain thread dump of a specific list of threads
+ do_thread_dump(&dump_result,
+ ids_ah,
+ num_threads,
+ -1, /* entire stack */
+ (locked_monitors ? true : false), /* with locked monitors */
+ (locked_synchronizers ? true : false), /* with locked synchronizers */
+ CHECK_NULL);
+ } else {
+ // obtain thread dump of all threads
+ VM_ThreadDump op(&dump_result,
+ -1, /* entire stack */
+ (locked_monitors ? true : false), /* with locked monitors */
+ (locked_synchronizers ? true : false) /* with locked synchronizers */);
+ VMThread::execute(&op);
+ }
+
+ int num_snapshots = dump_result.num_snapshots();
+
+ // create the result ThreadInfo[] object
+ klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
+ instanceKlassHandle ik (THREAD, k);
+ objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL);
+ objArrayHandle result_h(THREAD, r);
+
+ int index = 0;
+ for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) {
+ if (ts->threadObj() == NULL) {
+ // if the thread does not exist or now it is terminated, set threadinfo to NULL
+ result_h->obj_at_put(index, NULL);
+ continue;
+ }
+
+
+
+ ThreadStackTrace* stacktrace = ts->get_stack_trace();
+ assert(stacktrace != NULL, "Must have a stack trace dumped");
+
+ // Create Object[] filled with locked monitors
+ // Create int[] filled with the stack depth where a monitor was locked
+ int num_frames = stacktrace->get_stack_depth();
+ int num_locked_monitors = stacktrace->num_jni_locked_monitors();
+
+ // Count the total number of locked monitors
+ for (int i = 0; i < num_frames; i++) {
+ StackFrameInfo* frame = stacktrace->stack_frame_at(i);
+ num_locked_monitors += frame->num_locked_monitors();
+ }
+
+ objArrayHandle monitors_array;
+ typeArrayHandle depths_array;
+ objArrayHandle synchronizers_array;
+
+ if (locked_monitors) {
+ // Constructs Object[] and int[] to contain the object monitor and the stack depth
+ // where the thread locked it
+ objArrayOop array = oopFactory::new_system_objArray(num_locked_monitors, CHECK_NULL);
+ objArrayHandle mh(THREAD, array);
+ monitors_array = mh;
+
+ typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL);
+ typeArrayHandle dh(THREAD, tarray);
+ depths_array = dh;
+
+ int count = 0;
+ int j = 0;
+ for (int depth = 0; depth < num_frames; depth++) {
+ StackFrameInfo* frame = stacktrace->stack_frame_at(depth);
+ int len = frame->num_locked_monitors();
+ GrowableArray<oop>* locked_monitors = frame->locked_monitors();
+ for (j = 0; j < len; j++) {
+ oop monitor = locked_monitors->at(j);
+ assert(monitor != NULL && monitor->is_instance(), "must be a Java object");
+ monitors_array->obj_at_put(count, monitor);
+ depths_array->int_at_put(count, depth);
+ count++;
+ }
+ }
+
+ GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors();
+ for (j = 0; j < jni_locked_monitors->length(); j++) {
+ oop object = jni_locked_monitors->at(j);
+ assert(object != NULL && object->is_instance(), "must be a Java object");
+ monitors_array->obj_at_put(count, object);
+ // Monitor locked via JNI MonitorEnter call doesn't have stack depth info
+ depths_array->int_at_put(count, -1);
+ count++;
+ }
+ assert(count == num_locked_monitors, "number of locked monitors doesn't match");
+ }
+
+ if (locked_synchronizers) {
+ // Create Object[] filled with locked JSR-166 synchronizers
+ assert(ts->threadObj() != NULL, "Must be a valid JavaThread");
+ ThreadConcurrentLocks* tcl = ts->get_concurrent_locks();
+ GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL);
+ int num_locked_synchronizers = (locks != NULL ? locks->length() : 0);
+
+ objArrayOop array = oopFactory::new_system_objArray(num_locked_synchronizers, CHECK_NULL);
+ objArrayHandle sh(THREAD, array);
+ synchronizers_array = sh;
+
+ for (int k = 0; k < num_locked_synchronizers; k++) {
+ synchronizers_array->obj_at_put(k, locks->at(k));
+ }
+ }
+
+ // Create java.lang.management.ThreadInfo object
+ instanceOop info_obj = Management::create_thread_info_instance(ts,
+ monitors_array,
+ depths_array,
+ synchronizers_array,
+ CHECK_NULL);
+ result_h->obj_at_put(index, info_obj);
+ }
+
+ return (jobjectArray) JNIHandles::make_local(env, result_h());
+JVM_END
+
+// Returns an array of Class objects.
+JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env))
+ ResourceMark rm(THREAD);
+
+ LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter
+
+ int num_classes = lce.num_loaded_classes();
+ objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), num_classes, CHECK_0);
+ objArrayHandle classes_ah(THREAD, r);
+
+ for (int i = 0; i < num_classes; i++) {
+ KlassHandle kh = lce.get_klass(i);
+ oop mirror = Klass::cast(kh())->java_mirror();
+ classes_ah->obj_at_put(i, mirror);
+ }
+
+ return (jobjectArray) JNIHandles::make_local(env, classes_ah());
+JVM_END
+
+// Reset statistic. Return true if the requested statistic is reset.
+// Otherwise, return false.
+//
+// Input parameters:
+// obj - specify which instance the statistic associated with to be reset
+// For PEAK_POOL_USAGE stat, obj is required to be a memory pool object.
+// For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID.
+// type - the type of statistic to be reset
+//
+JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type))
+ ResourceMark rm(THREAD);
+
+ switch (type) {
+ case JMM_STAT_PEAK_THREAD_COUNT:
+ ThreadService::reset_peak_thread_count();
+ return true;
+
+ case JMM_STAT_THREAD_CONTENTION_COUNT:
+ case JMM_STAT_THREAD_CONTENTION_TIME: {
+ jlong tid = obj.j;
+ if (tid < 0) {
+ THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE);
+ }
+
+ // Look for the JavaThread of this given tid
+ MutexLockerEx ml(Threads_lock);
+ if (tid == 0) {
+ // reset contention statistics for all threads if tid == 0
+ for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) {
+ if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
+ ThreadService::reset_contention_count_stat(java_thread);
+ } else {
+ ThreadService::reset_contention_time_stat(java_thread);
+ }
+ }
+ } else {
+ // reset contention statistics for a given thread
+ JavaThread* java_thread = find_java_thread_from_id(tid);
+ if (java_thread == NULL) {
+ return false;
+ }
+
+ if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
+ ThreadService::reset_contention_count_stat(java_thread);
+ } else {
+ ThreadService::reset_contention_time_stat(java_thread);
+ }
+ }
+ return true;
+ break;
+ }
+ case JMM_STAT_PEAK_POOL_USAGE: {
+ jobject o = obj.l;
+ if (o == NULL) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
+ }
+
+ oop pool_obj = JNIHandles::resolve(o);
+ assert(pool_obj->is_instance(), "Should be an instanceOop");
+ instanceHandle ph(THREAD, (instanceOop) pool_obj);
+
+ MemoryPool* pool = MemoryService::get_memory_pool(ph);
+ if (pool != NULL) {
+ pool->reset_peak_memory_usage();
+ return true;
+ }
+ break;
+ }
+ case JMM_STAT_GC_STAT: {
+ jobject o = obj.l;
+ if (o == NULL) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
+ }
+
+ GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0);
+ if (mgr != NULL) {
+ mgr->reset_gc_stat();
+ return true;
+ }
+ break;
+ }
+ default:
+ assert(0, "Unknown Statistic Type");
+ }
+ return false;
+JVM_END
+
+// Returns the fast estimate of CPU time consumed by
+// a given thread (in nanoseconds).
+// If thread_id == 0, return CPU time for the current thread.
+JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id))
+ if (!os::is_thread_cpu_time_supported()) {
+ return -1;
+ }
+
+ if (thread_id < 0) {
+ THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+ "Invalid thread ID", -1);
+ }
+
+ JavaThread* java_thread = NULL;
+ if (thread_id == 0) {
+ // current thread
+ return os::current_thread_cpu_time();
+ } else {
+ MutexLockerEx ml(Threads_lock);
+ java_thread = find_java_thread_from_id(thread_id);
+ if (java_thread != NULL) {
+ return os::thread_cpu_time((Thread*) java_thread);
+ }
+ }
+ return -1;
+JVM_END
+
+// Returns the CPU time consumed by a given thread (in nanoseconds).
+// If thread_id == 0, CPU time for the current thread is returned.
+// If user_sys_cpu_time = true, user level and system CPU time of
+// a given thread is returned; otherwise, only user level CPU time
+// is returned.
+JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time))
+ if (!os::is_thread_cpu_time_supported()) {
+ return -1;
+ }
+
+ if (thread_id < 0) {
+ THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+ "Invalid thread ID", -1);
+ }
+
+ JavaThread* java_thread = NULL;
+ if (thread_id == 0) {
+ // current thread
+ return os::current_thread_cpu_time(user_sys_cpu_time != 0);
+ } else {
+ MutexLockerEx ml(Threads_lock);
+ java_thread = find_java_thread_from_id(thread_id);
+ if (java_thread != NULL) {
+ return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0);
+ }
+ }
+ return -1;
+JVM_END
+
+// Returns a String array of all VM global flag names
+JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env))
+ // last flag entry is always NULL, so subtract 1
+ int nFlags = (int) Flag::numFlags - 1;
+ // allocate a temp array
+ objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
+ nFlags, CHECK_0);
+ objArrayHandle flags_ah(THREAD, r);
+ int num_entries = 0;
+ for (int i = 0; i < nFlags; i++) {
+ Flag* flag = &Flag::flags[i];
+ // Exclude the diagnostic flags
+ if (flag->is_unlocked() || flag->is_unlocker()) {
+ Handle s = java_lang_String::create_from_str(flag->name, CHECK_0);
+ flags_ah->obj_at_put(num_entries, s());
+ num_entries++;
+ }
+ }
+
+ if (num_entries < nFlags) {
+ // Return array of right length
+ objArrayOop res = oopFactory::new_objArray(SystemDictionary::string_klass(), num_entries, CHECK_0);
+ for(int i = 0; i < num_entries; i++) {
+ res->obj_at_put(i, flags_ah->obj_at(i));
+ }
+ return (jobjectArray)JNIHandles::make_local(env, res);
+ }
+
+ return (jobjectArray)JNIHandles::make_local(env, flags_ah());
+JVM_END
+
+// utility function used by jmm_GetVMGlobals
+void add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) {
+ Handle flag_name;
+ if (name() == NULL) {
+ flag_name = java_lang_String::create_from_str(flag->name, CHECK);
+ } else {
+ flag_name = name;
+ }
+ global->name = (jstring)JNIHandles::make_local(env, flag_name());
+ global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
+
+ if (flag->is_bool()) {
+ global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE;
+ global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN;
+ } else if (flag->is_intx()) {
+ global->value.j = (jlong)flag->get_intx();
+ global->type = JMM_VMGLOBAL_TYPE_JLONG;
+ } else if (flag->is_uintx()) {
+ global->value.j = (jlong)flag->get_uintx();
+ global->type = JMM_VMGLOBAL_TYPE_JLONG;
+ } else if (flag->is_ccstr()) {
+ Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK);
+ global->value.l = (jobject)JNIHandles::make_local(env, str());
+ global->type = JMM_VMGLOBAL_TYPE_JSTRING;
+ }
+
+ global->writeable = flag->is_writeable();
+ global->external = flag->is_external();
+ switch (flag->origin) {
+ case DEFAULT:
+ global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT;
+ break;
+ case COMMAND_LINE:
+ global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE;
+ break;
+ case ENVIRON_VAR:
+ global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR;
+ break;
+ case CONFIG_FILE:
+ global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE;
+ break;
+ case MANAGEMENT:
+ global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT;
+ break;
+ case ERGONOMIC:
+ global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC;
+ break;
+ default:
+ global->origin = JMM_VMGLOBAL_ORIGIN_OTHER;
+ }
+}
+
+// Fill globals array of count length with jmmVMGlobal entries
+// specified by names. If names == NULL, fill globals array
+// with all Flags. Return value is number of entries
+// created in globals.
+// If a Flag with a given name in an array element does not
+// exist, globals[i].name will be set to NULL.
+JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env,
+ jobjectArray names,
+ jmmVMGlobal *globals,
+ jint count))
+
+
+ if (globals == NULL) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), 0);
+ }
+
+ ResourceMark rm(THREAD);
+
+ if (names != NULL) {
+ // return the requested globals
+ objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names));
+ objArrayHandle names_ah(THREAD, ta);
+ // Make sure we have a String array
+ klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass();
+ if (element_klass != SystemDictionary::string_klass()) {
+ THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+ "Array element type is not String class", 0);
+ }
+
+ int names_length = names_ah->length();
+ int num_entries = 0;
+ for (int i = 0; i < names_length && i < count; i++) {
+ oop s = names_ah->obj_at(i);
+ if (s == NULL) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), 0);
+ }
+
+ Handle sh(THREAD, s);
+ char* str = java_lang_String::as_utf8_string(s);
+ Flag* flag = Flag::find_flag(str, strlen(str));
+ if (flag != NULL) {
+ add_global_entry(env, sh, &globals[i], flag, THREAD);
+ num_entries++;
+ } else {
+ globals[i].name = NULL;
+ }
+ }
+ return num_entries;
+ } else {
+ // return all globals if names == NULL
+
+ // last flag entry is always NULL, so subtract 1
+ int nFlags = (int) Flag::numFlags - 1;
+ Handle null_h;
+ int num_entries = 0;
+ for (int i = 0; i < nFlags && num_entries < count; i++) {
+ Flag* flag = &Flag::flags[i];
+ // Exclude the diagnostic flags
+ if (flag->is_unlocked() || flag->is_unlocker()) {
+ add_global_entry(env, null_h, &globals[num_entries], flag, THREAD);
+ num_entries++;
+ }
+ }
+ return num_entries;
+ }
+JVM_END
+
+JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value))
+ ResourceMark rm(THREAD);
+
+ oop fn = JNIHandles::resolve_external_guard(flag_name);
+ if (fn == NULL) {
+ THROW_MSG(vmSymbols::java_lang_NullPointerException(),
+ "The flag name cannot be null.");
+ }
+ char* name = java_lang_String::as_utf8_string(fn);
+ Flag* flag = Flag::find_flag(name, strlen(name));
+ if (flag == NULL) {
+ THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
+ "Flag does not exist.");
+ }
+ if (!flag->is_writeable()) {
+ THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
+ "This flag is not writeable.");
+ }
+
+ bool succeed;
+ if (flag->is_bool()) {
+ bool bvalue = (new_value.z == JNI_TRUE ? true : false);
+ succeed = CommandLineFlags::boolAtPut(name, &bvalue, MANAGEMENT);
+ } else if (flag->is_intx()) {
+ intx ivalue = new_value.j;
+ succeed = CommandLineFlags::intxAtPut(name, &ivalue, MANAGEMENT);
+ } else if (flag->is_uintx()) {
+ uintx uvalue = new_value.j;
+ succeed = CommandLineFlags::uintxAtPut(name, &uvalue, MANAGEMENT);
+ } else if (flag->is_ccstr()) {
+ oop str = JNIHandles::resolve_external_guard(new_value.l);
+ if (str == NULL) {
+ THROW(vmSymbols::java_lang_NullPointerException());
+ }
+ ccstr svalue = java_lang_String::as_utf8_string(str);
+ succeed = CommandLineFlags::ccstrAtPut(name, &svalue, MANAGEMENT);
+ }
+ assert(succeed, "Setting flag should succeed");
+JVM_END
+
+class ThreadTimesClosure: public ThreadClosure {
+ private:
+ objArrayOop _names;
+ typeArrayOop _times;
+ int _names_len;
+ int _times_len;
+ int _count;
+
+ public:
+ ThreadTimesClosure(objArrayOop names, typeArrayOop times);
+ virtual void do_thread(Thread* thread);
+ int count() { return _count; }
+};
+
+ThreadTimesClosure::ThreadTimesClosure(objArrayOop names,
+ typeArrayOop times) {
+ assert(names != NULL, "names was NULL");
+ assert(times != NULL, "times was NULL");
+ _names = names;
+ _names_len = names->length();
+ _times = times;
+ _times_len = times->length();
+ _count = 0;
+}
+
+void ThreadTimesClosure::do_thread(Thread* thread) {
+ Handle s;
+ assert(thread != NULL, "thread was NULL");
+
+ // exclude externally visible JavaThreads
+ if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
+ return;
+ }
+
+ if (_count >= _names_len || _count >= _times_len) {
+ // skip if the result array is not big enough
+ return;
+ }
+
+ EXCEPTION_MARK;
+
+ assert(thread->name() != NULL, "All threads should have a name");
+ s = java_lang_String::create_from_str(thread->name(), CHECK);
+ _names->obj_at_put(_count, s());
+
+ _times->long_at_put(_count, os::is_thread_cpu_time_supported() ?
+ os::thread_cpu_time(thread) : -1);
+ _count++;
+}
+
+// Fills names with VM internal thread names and times with the corresponding
+// CPU times. If names or times is NULL, a NullPointerException is thrown.
+// If the element type of names is not String, an IllegalArgumentException is
+// thrown.
+// If an array is not large enough to hold all the entries, only the entries
+// that fit will be returned. Return value is the number of VM internal
+// threads entries.
+JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env,
+ jobjectArray names,
+ jlongArray times))
+ if (names == NULL || times == NULL) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), 0);
+ }
+ objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names));
+ objArrayHandle names_ah(THREAD, na);
+
+ // Make sure we have a String array
+ klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass();
+ if (element_klass != SystemDictionary::string_klass()) {
+ THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+ "Array element type is not String class", 0);
+ }
+
+ typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times));
+ typeArrayHandle times_ah(THREAD, ta);
+
+ ThreadTimesClosure ttc(names_ah(), times_ah());
+ {
+ MutexLockerEx ml(Threads_lock);
+ Threads::threads_do(&ttc);
+ }
+
+ return ttc.count();
+JVM_END
+
+static Handle find_deadlocks(bool object_monitors_only, TRAPS) {
+ ResourceMark rm(THREAD);
+
+ VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */);
+ VMThread::execute(&op);
+
+ DeadlockCycle* deadlocks = op.result();
+ if (deadlocks == NULL) {
+ // no deadlock found and return
+ return Handle();
+ }
+
+ int num_threads = 0;
+ DeadlockCycle* cycle;
+ for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
+ num_threads += cycle->num_threads();
+ }
+
+ objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NH);
+ objArrayHandle threads_ah(THREAD, r);
+
+ int index = 0;
+ for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
+ GrowableArray<JavaThread*>* deadlock_threads = cycle->threads();
+ int len = deadlock_threads->length();
+ for (int i = 0; i < len; i++) {
+ threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj());
+ index++;
+ }
+ }
+ return threads_ah;
+}
+
+// Finds cycles of threads that are deadlocked involved in object monitors
+// and JSR-166 synchronizers.
+// Returns an array of Thread objects which are in deadlock, if any.
+// Otherwise, returns NULL.
+//
+// Input parameter:
+// object_monitors_only - if true, only check object monitors
+//
+JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only))
+ Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0);
+ return (jobjectArray) JNIHandles::make_local(env, result());
+JVM_END
+
+// Finds cycles of threads that are deadlocked on monitor locks
+// Returns an array of Thread objects which are in deadlock, if any.
+// Otherwise, returns NULL.
+JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env))
+ Handle result = find_deadlocks(true, CHECK_0);
+ return (jobjectArray) JNIHandles::make_local(env, result());
+JVM_END
+
+// Gets the information about GC extension attributes including
+// the name of the attribute, its type, and a short description.
+//
+// Input parameters:
+// mgr - GC memory manager
+// info - caller allocated array of jmmExtAttributeInfo
+// count - number of elements of the info array
+//
+// Returns the number of GC extension attributes filled in the info array; or
+// -1 if info is not big enough
+//
+JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count))
+ // All GC memory managers have 1 attribute (number of GC threads)
+ if (count == 0) {
+ return 0;
+ }
+
+ if (info == NULL) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), 0);
+ }
+
+ info[0].name = "GcThreadCount";
+ info[0].type = 'I';
+ info[0].description = "Number of GC threads";
+ return 1;
+JVM_END
+
+// verify the given array is an array of java/lang/management/MemoryUsage objects
+// of a given length and return the objArrayOop
+static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) {
+ if (array == NULL) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), 0);
+ }
+
+ objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array));
+ objArrayHandle array_h(THREAD, oa);
+
+ // array must be of the given length
+ if (length != array_h->length()) {
+ THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+ "The length of the given MemoryUsage array does not match the number of memory pools.", 0);
+ }
+
+ // check if the element of array is of type MemoryUsage class
+ klassOop usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0);
+ klassOop element_klass = objArrayKlass::cast(array_h->klass())->element_klass();
+ if (element_klass != usage_klass) {
+ THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+ "The element type is not MemoryUsage class", 0);
+ }
+
+ return array_h();
+}
+
+// Gets the statistics of the last GC of a given GC memory manager.
+// Input parameters:
+// obj - GarbageCollectorMXBean object
+// gc_stat - caller allocated jmmGCStat where:
+// a. before_gc_usage - array of MemoryUsage objects
+// b. after_gc_usage - array of MemoryUsage objects
+// c. gc_ext_attributes_values_size is set to the
+// gc_ext_attribute_values array allocated
+// d. gc_ext_attribute_values is a caller allocated array of jvalue.
+//
+// On return,
+// gc_index == 0 indicates no GC statistics available
+//
+// before_gc_usage and after_gc_usage - filled with per memory pool
+// before and after GC usage in the same order as the memory pools
+// returned by GetMemoryPools for a given GC memory manager.
+// num_gc_ext_attributes indicates the number of elements in
+// the gc_ext_attribute_values array is filled; or
+// -1 if the gc_ext_attributes_values array is not big enough
+//
+JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat))
+ ResourceMark rm(THREAD);
+
+ if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) {
+ THROW(vmSymbols::java_lang_NullPointerException());
+ }
+
+ // Get the GCMemoryManager
+ GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
+ if (mgr->last_gc_stat() == NULL) {
+ gc_stat->gc_index = 0;
+ return;
+ }
+
+ // Make a copy of the last GC statistics
+ // GC may occur while constructing the last GC information
+ int num_pools = MemoryService::num_memory_pools();
+ GCStatInfo* stat = new GCStatInfo(num_pools);
+ stat->copy_stat(mgr->last_gc_stat());
+
+ gc_stat->gc_index = stat->gc_index();
+ gc_stat->start_time = Management::ticks_to_ms(stat->start_time());
+ gc_stat->end_time = Management::ticks_to_ms(stat->end_time());
+
+ // Current implementation does not have GC extension attributes
+ gc_stat->num_gc_ext_attributes = 0;
+
+ // Fill the arrays of MemoryUsage objects with before and after GC
+ // per pool memory usage
+ objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc,
+ num_pools,
+ CHECK);
+ objArrayHandle usage_before_gc_ah(THREAD, bu);
+
+ objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc,
+ num_pools,
+ CHECK);
+ objArrayHandle usage_after_gc_ah(THREAD, au);
+
+ for (int i = 0; i < num_pools; i++) {
+ Handle before_usage = MemoryService::create_MemoryUsage_obj(stat->before_gc_usage_for_pool(i), CHECK);
+ Handle after_usage;
+
+ MemoryUsage u = stat->after_gc_usage_for_pool(i);
+ if (u.max_size() == 0 && u.used() > 0) {
+ // If max size == 0, this pool is a survivor space.
+ // Set max size = -1 since the pools will be swapped after GC.
+ MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1);
+ after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK);
+ } else {
+ after_usage = MemoryService::create_MemoryUsage_obj(stat->after_gc_usage_for_pool(i), CHECK);
+ }
+ usage_before_gc_ah->obj_at_put(i, before_usage());
+ usage_after_gc_ah->obj_at_put(i, after_usage());
+ }
+
+ if (gc_stat->gc_ext_attribute_values_size > 0) {
+ // Current implementation only has 1 attribute (number of GC threads)
+ // The type is 'I'
+ gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads();
+ }
+JVM_END
+
+// Dump heap - Returns 0 if succeeds.
+JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live))
+#ifndef SERVICES_KERNEL
+ ResourceMark rm(THREAD);
+ oop on = JNIHandles::resolve_external_guard(outputfile);
+ if (on == NULL) {
+ THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
+ "Output file name cannot be null.", -1);
+ }
+ char* name = java_lang_String::as_utf8_string(on);
+ if (name == NULL) {
+ THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
+ "Output file name cannot be null.", -1);
+ }
+ HeapDumper dumper(live ? true : false);
+ if (dumper.dump(name) != 0) {
+ const char* errmsg = dumper.error_as_C_string();
+ THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1);
+ }
+ return 0;
+#else // SERVICES_KERNEL
+ return -1;
+#endif // SERVICES_KERNEL
+JVM_END
+
+jlong Management::ticks_to_ms(jlong ticks) {
+ assert(os::elapsed_frequency() > 0, "Must be non-zero");
+ return (jlong)(((double)ticks / (double)os::elapsed_frequency())
+ * (double)1000.0);
+}
+
+const struct jmmInterface_1_ jmm_interface = {
+ NULL,
+ NULL,
+ jmm_GetVersion,
+ jmm_GetOptionalSupport,
+ jmm_GetInputArguments,
+ jmm_GetThreadInfo,
+ jmm_GetInputArgumentArray,
+ jmm_GetMemoryPools,
+ jmm_GetMemoryManagers,
+ jmm_GetMemoryPoolUsage,
+ jmm_GetPeakMemoryPoolUsage,
+ NULL,
+ jmm_GetMemoryUsage,
+ jmm_GetLongAttribute,
+ jmm_GetBoolAttribute,
+ jmm_SetBoolAttribute,
+ jmm_GetLongAttributes,
+ jmm_FindMonitorDeadlockedThreads,
+ jmm_GetThreadCpuTime,
+ jmm_GetVMGlobalNames,
+ jmm_GetVMGlobals,
+ jmm_GetInternalThreadTimes,
+ jmm_ResetStatistic,
+ jmm_SetPoolSensor,
+ jmm_SetPoolThreshold,
+ jmm_GetPoolCollectionUsage,
+ jmm_GetGCExtAttributeInfo,
+ jmm_GetLastGCStat,
+ jmm_GetThreadCpuTimeWithKind,
+ NULL,
+ jmm_DumpHeap0,
+ jmm_FindDeadlockedThreads,
+ jmm_SetVMGlobal,
+ NULL,
+ jmm_DumpThreads
+};
+
+void* Management::get_jmm_interface(int version) {
+ if (version == JMM_VERSION_1_0) {
+ return (void*) &jmm_interface;
+ }
+ return NULL;
+}