| /* |
| * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #include "compiler/compileBroker.hpp" |
| #include "memory/iterator.hpp" |
| #include "memory/oopFactory.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "oops/klass.hpp" |
| #include "oops/klassOop.hpp" |
| #include "oops/objArrayKlass.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/globals.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/interfaceSupport.hpp" |
| #include "runtime/javaCalls.hpp" |
| #include "runtime/jniHandles.hpp" |
| #include "runtime/os.hpp" |
| #include "runtime/serviceThread.hpp" |
| #include "services/classLoadingService.hpp" |
| #include "services/diagnosticCommand.hpp" |
| #include "services/diagnosticFramework.hpp" |
| #include "services/heapDumper.hpp" |
| #include "services/jmm.h" |
| #include "services/lowMemoryDetector.hpp" |
| #include "services/gcNotifier.hpp" |
| #include "services/nmtDCmd.hpp" |
| #include "services/management.hpp" |
| #include "services/memoryManager.hpp" |
| #include "services/memoryPool.hpp" |
| #include "services/memoryService.hpp" |
| #include "services/runtimeService.hpp" |
| #include "services/threadService.hpp" |
| |
| 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; |
| klassOop Management::_garbageCollectorImpl_klass = NULL; |
| klassOop Management::_gcInfo_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; |
| // This depends on the heap inspector |
| _optional_support.isSynchronizerUsageSupported = 1; |
| _optional_support.isThreadAllocatedMemorySupported = 1; |
| |
| // Registration of the diagnostic commands |
| DCmdRegistrant::register_dcmds(); |
| DCmdRegistrant::register_dcmds_ext(); |
| DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(true, false)); |
| } |
| |
| void Management::initialize(TRAPS) { |
| // Start the service thread |
| ServiceThread::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(vmSymbols::sun_management_Agent(), |
| loader, |
| Handle(), |
| true, |
| CHECK); |
| instanceKlassHandle ik (THREAD, k); |
| |
| JavaValue result(T_VOID); |
| JavaCalls::call_static(&result, |
| ik, |
| vmSymbols::startAgent_name(), |
| vmSymbols::void_method_signature(), |
| CHECK); |
| } |
| } |
| |
| void Management::get_optional_support(jmmOptionalSupport* support) { |
| memcpy(support, &_optional_support, sizeof(jmmOptionalSupport)); |
| } |
| |
| klassOop Management::load_and_initialize_klass(Symbol* 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); |
| f->do_oop((oop*) &_garbageCollectorImpl_klass); |
| f->do_oop((oop*) &_gcInfo_klass); |
| } |
| |
| klassOop Management::java_lang_management_ThreadInfo_klass(TRAPS) { |
| if (_threadInfo_klass == NULL) { |
| _threadInfo_klass = load_and_initialize_klass(vmSymbols::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(vmSymbols::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(vmSymbols::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(vmSymbols::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(vmSymbols::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(vmSymbols::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(vmSymbols::sun_management_ManagementFactory(), CHECK_NULL); |
| } |
| return _managementFactory_klass; |
| } |
| |
| klassOop Management::sun_management_GarbageCollectorImpl_klass(TRAPS) { |
| if (_garbageCollectorImpl_klass == NULL) { |
| _garbageCollectorImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_GarbageCollectorImpl(), CHECK_NULL); |
| } |
| return _garbageCollectorImpl_klass; |
| } |
| |
| klassOop Management::com_sun_management_GcInfo_klass(TRAPS) { |
| if (_gcInfo_klass == NULL) { |
| _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL); |
| } |
| return _gcInfo_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, |
| vmSymbols::object_initializer_name(), |
| vmSymbols::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, |
| vmSymbols::object_initializer_name(), |
| vmSymbols::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(); |
| |
| // 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 ((size_t)threshold > max_uintx) { |
| stringStream st; |
| st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx); |
| THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -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 |
| |
| // Gets an array containing the amount of memory allocated on the Java |
| // heap for a set of threads (in bytes). Each element of the array is |
| // the amount of memory allocated for the thread ID specified in the |
| // corresponding entry in the given array of thread IDs; or -1 if the |
| // thread does not exist or has terminated. |
| JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids, |
| jlongArray sizeArray)) |
| // Check if threads is null |
| if (ids == NULL || sizeArray == NULL) { |
| THROW(vmSymbols::java_lang_NullPointerException()); |
| } |
| |
| ResourceMark rm(THREAD); |
| typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); |
| typeArrayHandle ids_ah(THREAD, ta); |
| |
| typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray)); |
| typeArrayHandle sizeArray_h(THREAD, sa); |
| |
| // validate the thread id array |
| validate_thread_id_array(ids_ah, CHECK); |
| |
| // sizeArray must be of the same length as the given array of thread IDs |
| int num_threads = ids_ah->length(); |
| if (num_threads != sizeArray_h->length()) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "The length of the given long array does not match the length of " |
| "the given array of thread IDs"); |
| } |
| |
| MutexLockerEx ml(Threads_lock); |
| for (int i = 0; i < num_threads; i++) { |
| JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); |
| if (java_thread != NULL) { |
| sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes()); |
| } |
| } |
| 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 (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(); |
| } |
| } |
| } |
| |
| // if any one of the memory pool has undefined init_size or max_size, |
| // set it to -1 |
| if (has_undefined_init_size) { |
| total_init = (size_t)-1; |
| } |
| if (has_undefined_max_size) { |
| total_max = (size_t)-1; |
| } |
| |
| // In our current implementation, we make sure that all non-heap |
| // pools have defined init and max sizes. Heap pools do not matter, |
| // as we never use total_init and total_max for them. |
| assert(heap || !has_undefined_init_size, "Undefined init size"); |
| assert(heap || !has_undefined_max_size, "Undefined max size"); |
| |
| MemoryUsage usage((heap ? InitialHeapSize : 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(); |
| case JMM_THREAD_ALLOCATED_MEMORY: |
| return ThreadService::is_thread_allocated_memory_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); |
| case JMM_THREAD_ALLOCATED_MEMORY: |
| return ThreadService::set_thread_allocated_memory_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 locked (diagnostic, experimental) 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 |
| // |
| // QQQ - Why does this method return a value instead of void? |
| 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_objArray(SystemDictionary::Object_klass(), 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_objArray(SystemDictionary::Object_klass(), 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 |
| |
| // Gets an array containing the CPU times consumed by a set of threads |
| // (in nanoseconds). Each element of the array is the CPU time for the |
| // thread ID specified in the corresponding entry in the given array |
| // of thread IDs; or -1 if the thread does not exist or has terminated. |
| // If user_sys_cpu_time = true, the sum of user level and system CPU time |
| // for the given thread is returned; otherwise, only user level CPU time |
| // is returned. |
| JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids, |
| jlongArray timeArray, |
| jboolean user_sys_cpu_time)) |
| // Check if threads is null |
| if (ids == NULL || timeArray == NULL) { |
| THROW(vmSymbols::java_lang_NullPointerException()); |
| } |
| |
| ResourceMark rm(THREAD); |
| typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); |
| typeArrayHandle ids_ah(THREAD, ta); |
| |
| typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray)); |
| typeArrayHandle timeArray_h(THREAD, tia); |
| |
| // validate the thread id array |
| validate_thread_id_array(ids_ah, CHECK); |
| |
| // timeArray must be of the same length as the given array of thread IDs |
| int num_threads = ids_ah->length(); |
| if (num_threads != timeArray_h->length()) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "The length of the given long array does not match the length of " |
| "the given array of thread IDs"); |
| } |
| |
| MutexLockerEx ml(Threads_lock); |
| for (int i = 0; i < num_threads; i++) { |
| JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); |
| if (java_thread != NULL) { |
| timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread, |
| user_sys_cpu_time != 0)); |
| } |
| } |
| 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 locked (experimental, 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. Returns false if flag type |
| // can't be determined, true otherwise. If false is returned, then *global |
| // will be incomplete and invalid. |
| bool 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_false); |
| } else { |
| flag_name = name; |
| } |
| global->name = (jstring)JNIHandles::make_local(env, flag_name()); |
| |
| 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_uint64_t()) { |
| global->value.j = (jlong)flag->get_uint64_t(); |
| global->type = JMM_VMGLOBAL_TYPE_JLONG; |
| } else if (flag->is_ccstr()) { |
| Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false); |
| global->value.l = (jobject)JNIHandles::make_local(env, str()); |
| global->type = JMM_VMGLOBAL_TYPE_JSTRING; |
| } else { |
| global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; |
| return false; |
| } |
| |
| 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; |
| } |
| |
| return true; |
| } |
| |
| // 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 locked (diagnostic, experimental) 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 = (intx)new_value.j; |
| succeed = CommandLineFlags::intxAtPut(name, &ivalue, MANAGEMENT); |
| } else if (flag->is_uintx()) { |
| uintx uvalue = (uintx)new_value.j; |
| succeed = CommandLineFlags::uintxAtPut(name, &uvalue, MANAGEMENT); |
| } else if (flag->is_uint64_t()) { |
| uint64_t uvalue = (uint64_t)new_value.j; |
| succeed = CommandLineFlags::uint64_tAtPut(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: |
| objArrayHandle _names_strings; |
| char **_names_chars; |
| typeArrayOop _times; |
| int _names_len; |
| int _times_len; |
| int _count; |
| |
| public: |
| ThreadTimesClosure(objArrayHandle names, typeArrayOop times); |
| ~ThreadTimesClosure(); |
| virtual void do_thread(Thread* thread); |
| void do_unlocked(); |
| int count() { return _count; } |
| }; |
| |
| ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names, |
| typeArrayOop times) { |
| assert(names() != NULL, "names was NULL"); |
| assert(times != NULL, "times was NULL"); |
| _names_strings = names; |
| _names_len = names->length(); |
| _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal); |
| _times = times; |
| _times_len = times->length(); |
| _count = 0; |
| } |
| |
| // |
| // Called with Threads_lock held |
| // |
| void ThreadTimesClosure::do_thread(Thread* thread) { |
| 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; |
| ResourceMark rm(THREAD); // thread->name() uses ResourceArea |
| |
| assert(thread->name() != NULL, "All threads should have a name"); |
| _names_chars[_count] = strdup(thread->name()); |
| _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? |
| os::thread_cpu_time(thread) : -1); |
| _count++; |
| } |
| |
| // Called without Threads_lock, we can allocate String objects. |
| void ThreadTimesClosure::do_unlocked() { |
| |
| EXCEPTION_MARK; |
| for (int i = 0; i < _count; i++) { |
| Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK); |
| _names_strings->obj_at_put(i, s()); |
| } |
| } |
| |
| ThreadTimesClosure::~ThreadTimesClosure() { |
| for (int i = 0; i < _count; i++) { |
| free(_names_chars[i]); |
| } |
| FREE_C_HEAP_ARRAY(char *, _names_chars, mtInternal); |
| } |
| |
| // 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); |
| } |
| ttc.do_unlocked(); |
| 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); |
| |
| // 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(num_pools); |
| if (mgr->get_last_gc_stat(&stat) == 0) { |
| gc_stat->gc_index = 0; |
| return; |
| } |
| |
| 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 |
| |
| JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled)) |
| ResourceMark rm(THREAD); |
| // Get the GCMemoryManager |
| GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); |
| mgr->set_notification_enabled(enabled?true:false); |
| JVM_END |
| |
| // Dump heap - Returns 0 if succeeds. |
| JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) |
| 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; |
| JVM_END |
| |
| JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env)) |
| ResourceMark rm(THREAD); |
| GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(); |
| objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(), |
| dcmd_list->length(), CHECK_NULL); |
| objArrayHandle cmd_array(THREAD, cmd_array_oop); |
| for (int i = 0; i < dcmd_list->length(); i++) { |
| oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL); |
| cmd_array->obj_at_put(i, cmd_name); |
| } |
| return (jobjectArray) JNIHandles::make_local(env, cmd_array()); |
| JVM_END |
| |
| JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds, |
| dcmdInfo* infoArray)) |
| if (cmds == NULL || infoArray == NULL) { |
| THROW(vmSymbols::java_lang_NullPointerException()); |
| } |
| |
| ResourceMark rm(THREAD); |
| |
| objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds)); |
| objArrayHandle cmds_ah(THREAD, ca); |
| |
| // Make sure we have a String array |
| klassOop element_klass = objArrayKlass::cast(cmds_ah->klass())->element_klass(); |
| if (element_klass != SystemDictionary::String_klass()) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "Array element type is not String class"); |
| } |
| |
| GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(); |
| |
| int num_cmds = cmds_ah->length(); |
| for (int i = 0; i < num_cmds; i++) { |
| oop cmd = cmds_ah->obj_at(i); |
| if (cmd == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
| "Command name cannot be null."); |
| } |
| char* cmd_name = java_lang_String::as_utf8_string(cmd); |
| if (cmd_name == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
| "Command name cannot be null."); |
| } |
| int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name); |
| if (pos == -1) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "Unknown diagnostic command"); |
| } |
| DCmdInfo* info = info_list->at(pos); |
| infoArray[i].name = info->name(); |
| infoArray[i].description = info->description(); |
| infoArray[i].impact = info->impact(); |
| infoArray[i].num_arguments = info->num_arguments(); |
| infoArray[i].enabled = info->is_enabled(); |
| } |
| JVM_END |
| |
| JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env, |
| jstring command, dcmdArgInfo* infoArray)) |
| ResourceMark rm(THREAD); |
| oop cmd = JNIHandles::resolve_external_guard(command); |
| if (cmd == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
| "Command line cannot be null."); |
| } |
| char* cmd_name = java_lang_String::as_utf8_string(cmd); |
| if (cmd_name == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
| "Command line content cannot be null."); |
| } |
| DCmd* dcmd = NULL; |
| DCmdFactory*factory = DCmdFactory::factory(cmd_name, strlen(cmd_name)); |
| if (factory != NULL) { |
| dcmd = factory->create_resource_instance(NULL); |
| } |
| if (dcmd == NULL) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "Unknown diagnostic command"); |
| } |
| DCmdMark mark(dcmd); |
| GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array(); |
| if (array->length() == 0) { |
| return; |
| } |
| for (int i = 0; i < array->length(); i++) { |
| infoArray[i].name = array->at(i)->name(); |
| infoArray[i].description = array->at(i)->description(); |
| infoArray[i].type = array->at(i)->type(); |
| infoArray[i].default_string = array->at(i)->default_string(); |
| infoArray[i].mandatory = array->at(i)->is_mandatory(); |
| infoArray[i].option = array->at(i)->is_option(); |
| infoArray[i].position = array->at(i)->position(); |
| } |
| return; |
| JVM_END |
| |
| JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline)) |
| ResourceMark rm(THREAD); |
| oop cmd = JNIHandles::resolve_external_guard(commandline); |
| if (cmd == NULL) { |
| THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), |
| "Command line cannot be null."); |
| } |
| char* cmdline = java_lang_String::as_utf8_string(cmd); |
| if (cmdline == NULL) { |
| THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), |
| "Command line content cannot be null."); |
| } |
| bufferedStream output; |
| DCmd::parse_and_execute(&output, cmdline, ' ', CHECK_NULL); |
| oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL); |
| return (jstring) JNIHandles::make_local(env, result); |
| 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, |
| jmm_GetThreadAllocatedMemory, |
| 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, |
| jmm_GetThreadCpuTimesWithKind, |
| jmm_DumpHeap0, |
| jmm_FindDeadlockedThreads, |
| jmm_SetVMGlobal, |
| NULL, |
| jmm_DumpThreads, |
| jmm_SetGCNotificationEnabled, |
| jmm_GetDiagnosticCommands, |
| jmm_GetDiagnosticCommandInfo, |
| jmm_GetDiagnosticCommandArgumentsInfo, |
| jmm_ExecuteDiagnosticCommand |
| }; |
| |
| void* Management::get_jmm_interface(int version) { |
| if (version == JMM_VERSION_1_0) { |
| return (void*) &jmm_interface; |
| } |
| return NULL; |
| } |