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

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

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author	duke
date	Sat, 01 Dec 2007 00:00:00 +0000
parents
children	ea20d7ce26b0 9127aa69352e

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--1:000000000000
+:a61af66fc99e
+/*
+* Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.
+* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+*
+* This code is free software; you can redistribute it and/or modify it
+* under the terms of the GNU General Public License version 2 only, as
+* published by the Free Software Foundation.
+*
+* This code is distributed in the hope that it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+* version 2 for more details (a copy is included in the LICENSE file that
+* accompanied this code).
+*
+* You should have received a copy of the GNU General Public License version
+* 2 along with this work; if not, write to the Free Software Foundation,
+* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+*
+* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+* CA 95054 USA or visit www.sun.com if you need additional information or
+* have any questions.
+*
+*/
+# include "incls/_precompiled.incl"
+# include "incls/_jvmtiEnv.cpp.incl"
+#define FIXLATER 0 // REMOVE this when completed.
+// FIXLATER: hook into JvmtiTrace
+#define TraceJVMTICalls false
+JvmtiEnv::JvmtiEnv() : JvmtiEnvBase() {
+}
+JvmtiEnv::~JvmtiEnv() {
+}
+JvmtiEnv*
+JvmtiEnv::create_a_jvmti() {
+return new JvmtiEnv();
+}
+// VM operation class to copy jni function table at safepoint.
+// More than one java threads or jvmti agents may be reading/
+// modifying jni function tables. To reduce the risk of bad
+// interaction b/w these threads it is copied at safepoint.
+class VM_JNIFunctionTableCopier : public VM_Operation {
+private:
+const struct JNINativeInterface_ *_function_table;
+public:
+VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
+_function_table = func_tbl;
+};
+VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
+void doit() {
+copy_jni_function_table(_function_table);
+};
+};
+//
+// Do not change the "prefix" marker below, everything above it is copied
+// unchanged into the filled stub, everything below is controlled by the
+// stub filler (only method bodies are carried forward, and then only for
+// functionality still in the spec).
+//
+// end file prefix
+//
+// Memory Management functions
+//
+// mem_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
+return allocate(size, mem_ptr);
+} /* end Allocate */
+// mem - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::Deallocate(unsigned char* mem) {
+return deallocate(mem);
+} /* end Deallocate */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// data - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
+JvmtiThreadState* state = java_thread->jvmti_thread_state();
+if (state == NULL) {
+if (data == NULL) {
+// leaving state unset same as data set to NULL
+return JVMTI_ERROR_NONE;
+}
+// otherwise, create the state
+state = JvmtiThreadState::state_for(java_thread);
+}
+state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
+return JVMTI_ERROR_NONE;
+} /* end SetThreadLocalStorage */
+// Threads_lock NOT held
+// thread - NOT pre-checked
+// data_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
+JavaThread* current_thread = JavaThread::current();
+if (thread == NULL) {
+JvmtiThreadState* state = current_thread->jvmti_thread_state();
+*data_ptr = (state == NULL) ? NULL :
+state->env_thread_state(this)->get_agent_thread_local_storage_data();
+} else {
+// jvmti_GetThreadLocalStorage is "in native" and doesn't transition
+// the thread to _thread_in_vm. However, when the TLS for a thread
+// other than the current thread is required we need to transition
+// from native so as to resolve the jthread.
+ThreadInVMfromNative __tiv(current_thread);
+__ENTRY(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
+debug_only(VMNativeEntryWrapper __vew;)
+oop thread_oop = JNIHandles::resolve_external_guard(thread);
+if (thread_oop == NULL) {
+return JVMTI_ERROR_INVALID_THREAD;
+}
+if (!thread_oop->is_a(SystemDictionary::thread_klass())) {
+return JVMTI_ERROR_INVALID_THREAD;
+}
+JavaThread* java_thread = java_lang_Thread::thread(thread_oop);
+if (java_thread == NULL) {
+return JVMTI_ERROR_THREAD_NOT_ALIVE;
+}
+JvmtiThreadState* state = java_thread->jvmti_thread_state();
+*data_ptr = (state == NULL) ? NULL :
+state->env_thread_state(this)->get_agent_thread_local_storage_data();
+}
+return JVMTI_ERROR_NONE;
+} /* end GetThreadLocalStorage */
+//
+// Class functions
+//
+// class_count_ptr - pre-checked for NULL
+// classes_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
+return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
+} /* end GetLoadedClasses */
+// initiating_loader - NULL is a valid value, must be checked
+// class_count_ptr - pre-checked for NULL
+// classes_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
+return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
+class_count_ptr, classes_ptr);
+} /* end GetClassLoaderClasses */
+// k_mirror - may be primitive, this must be checked
+// is_modifiable_class_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
+*is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
+JNI_TRUE : JNI_FALSE;
+return JVMTI_ERROR_NONE;
+} /* end IsModifiableClass */
+// class_count - pre-checked to be greater than or equal to 0
+// classes - pre-checked for NULL
+jvmtiError
+JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
+//TODO: add locking
+int index;
+JavaThread* current_thread = JavaThread::current();
+ResourceMark rm(current_thread);
+jvmtiClassDefinition* class_definitions =
+NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
+NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
+for (index = 0; index < class_count; index++) {
+HandleMark hm(current_thread);
+jclass jcls = classes[index];
+oop k_mirror = JNIHandles::resolve_external_guard(jcls);
+if (k_mirror == NULL) {
+return JVMTI_ERROR_INVALID_CLASS;
+}
+if (!k_mirror->is_a(SystemDictionary::class_klass())) {
+return JVMTI_ERROR_INVALID_CLASS;
+}
+if (java_lang_Class::is_primitive(k_mirror)) {
+return JVMTI_ERROR_UNMODIFIABLE_CLASS;
+}
+klassOop k_oop = java_lang_Class::as_klassOop(k_mirror);
+KlassHandle klass(current_thread, k_oop);
+jint status = klass->jvmti_class_status();
+if (status & (JVMTI_CLASS_STATUS_ERROR)) {
+return JVMTI_ERROR_INVALID_CLASS;
+}
+if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
+return JVMTI_ERROR_UNMODIFIABLE_CLASS;
+}
+instanceKlassHandle ikh(current_thread, k_oop);
+if (ikh->get_cached_class_file_bytes() == NULL) {
+// not cached, we need to reconstitute the class file from VM representation
+constantPoolHandle  constants(current_thread, ikh->constants());
+ObjectLocker ol(constants, current_thread);    // lock constant pool while we query it
+JvmtiClassFileReconstituter reconstituter(ikh);
+if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
+return reconstituter.get_error();
+}
+class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
+class_definitions[index].class_bytes      = (unsigned char*)
+reconstituter.class_file_bytes();
+} else {
+// it is cached, get it from the cache
+class_definitions[index].class_byte_count = ikh->get_cached_class_file_len();
+class_definitions[index].class_bytes      = ikh->get_cached_class_file_bytes();
+}
+class_definitions[index].klass              = jcls;
+}
+VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
+VMThread::execute(&op);
+return (op.check_error());
+} /* end RetransformClasses */
+// class_count - pre-checked to be greater than or equal to 0
+// class_definitions - pre-checked for NULL
+jvmtiError
+JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
+//TODO: add locking
+VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
+VMThread::execute(&op);
+return (op.check_error());
+} /* end RedefineClasses */
+//
+// Object functions
+//
+// size_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
+oop mirror = JNIHandles::resolve_external_guard(object);
+NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
+if (mirror->klass() == SystemDictionary::class_klass()) {
+if (!java_lang_Class::is_primitive(mirror)) {
+mirror = java_lang_Class::as_klassOop(mirror);
+assert(mirror != NULL, "class for non-primitive mirror must exist");
+}
+}
+*size_ptr = mirror->size() * wordSize;
+return JVMTI_ERROR_NONE;
+} /* end GetObjectSize */
+//
+// Method functions
+//
+// prefix - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
+return prefix == NULL?
+SetNativeMethodPrefixes(0, NULL) :
+SetNativeMethodPrefixes(1, (char**)&prefix);
+} /* end SetNativeMethodPrefix */
+// prefix_count - pre-checked to be greater than or equal to 0
+// prefixes - pre-checked for NULL
+jvmtiError
+JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
+// Have to grab JVMTI thread state lock to be sure that some thread
+// isn't accessing the prefixes at the same time we are setting them.
+// No locks during VM bring-up.
+if (Threads::number_of_threads() == 0) {
+return set_native_method_prefixes(prefix_count, prefixes);
+} else {
+MutexLocker mu(JvmtiThreadState_lock);
+return set_native_method_prefixes(prefix_count, prefixes);
+}
+} /* end SetNativeMethodPrefixes */
+//
+// Event Management functions
+//
+// callbacks - NULL is a valid value, must be checked
+// size_of_callbacks - pre-checked to be greater than or equal to 0
+jvmtiError
+JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
+JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
+return JVMTI_ERROR_NONE;
+} /* end SetEventCallbacks */
+// event_thread - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread,   ...) {
+JavaThread* java_thread = NULL;
+if (event_thread != NULL) {
+oop thread_oop = JNIHandles::resolve_external_guard(event_thread);
+if (thread_oop == NULL) {
+return JVMTI_ERROR_INVALID_THREAD;
+}
+if (!thread_oop->is_a(SystemDictionary::thread_klass())) {
+return JVMTI_ERROR_INVALID_THREAD;
+}
+java_thread = java_lang_Thread::thread(thread_oop);
+if (java_thread == NULL) {
+return JVMTI_ERROR_THREAD_NOT_ALIVE;
+}
+}
+// event_type must be valid
+if (!JvmtiEventController::is_valid_event_type(event_type)) {
+return JVMTI_ERROR_INVALID_EVENT_TYPE;
+}
+// global events cannot be controlled at thread level.
+if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) {
+return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+}
+bool enabled = (mode == JVMTI_ENABLE);
+// assure that needed capabilities are present
+if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
+return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
+}
+if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
+record_class_file_load_hook_enabled();
+}
+JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
+return JVMTI_ERROR_NONE;
+} /* end SetEventNotificationMode */
+//
+// Capability functions
+//
+// capabilities_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
+JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
+get_prohibited_capabilities(),
+capabilities_ptr);
+return JVMTI_ERROR_NONE;
+} /* end GetPotentialCapabilities */
+// capabilities_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
+return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
+get_prohibited_capabilities(),
+capabilities_ptr,
+get_capabilities());
+} /* end AddCapabilities */
+// capabilities_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
+JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
+return JVMTI_ERROR_NONE;
+} /* end RelinquishCapabilities */
+// capabilities_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
+JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
+return JVMTI_ERROR_NONE;
+} /* end GetCapabilities */
+//
+// Class Loader Search functions
+//
+// segment - pre-checked for NULL
+jvmtiError
+JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
+jvmtiPhase phase = get_phase();
+if (phase == JVMTI_PHASE_ONLOAD) {
+Arguments::append_sysclasspath(segment);
+return JVMTI_ERROR_NONE;
+} else {
+assert(phase == JVMTI_PHASE_LIVE, "sanity check");
+// create the zip entry
+ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
+if (zip_entry == NULL) {
+return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+}
+// lock the loader
+Thread* thread = Thread::current();
+HandleMark hm;
+Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
+ObjectLocker ol(loader_lock, thread);
+// add the jar file to the bootclasspath
+if (TraceClassLoading) {
+tty->print_cr("[Opened %s]", zip_entry->name());
+}
+ClassLoader::add_to_list(zip_entry);
+return JVMTI_ERROR_NONE;
+}
+} /* end AddToBootstrapClassLoaderSearch */
+// segment - pre-checked for NULL
+jvmtiError
+JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
+jvmtiPhase phase = get_phase();
+if (phase == JVMTI_PHASE_ONLOAD) {
+for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
+if (strcmp("java.class.path", p->key()) == 0) {
+p->append_value(segment);
+break;
+}
+}
+return JVMTI_ERROR_NONE;
+} else {
+HandleMark hm;
+assert(phase == JVMTI_PHASE_LIVE, "sanity check");
+// create the zip entry (which will open the zip file and hence
+// check that the segment is indeed a zip file).
+ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
+if (zip_entry == NULL) {
+return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+}
+delete zip_entry;   // no longer needed
+// lock the loader
+Thread* THREAD = Thread::current();
+Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
+ObjectLocker ol(loader, THREAD);
+// need the path as java.lang.String
+Handle path = java_lang_String::create_from_str(segment, THREAD);
+if (HAS_PENDING_EXCEPTION) {
+CLEAR_PENDING_EXCEPTION;
+return JVMTI_ERROR_INTERNAL;
+}
+instanceKlassHandle loader_ik(THREAD, loader->klass());
+// Invoke the appendToClassPathForInstrumentation method - if the method
+// is not found it means the loader doesn't support adding to the class path
+// in the live phase.
+{
+JavaValue res(T_VOID);
+JavaCalls::call_special(&res,
+loader,
+loader_ik,
+vmSymbolHandles::appendToClassPathForInstrumentation_name(),
+vmSymbolHandles::appendToClassPathForInstrumentation_signature(),
+path,
+THREAD);
+if (HAS_PENDING_EXCEPTION) {
+symbolOop ex_name = PENDING_EXCEPTION->klass()->klass_part()->name();
+CLEAR_PENDING_EXCEPTION;
+if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
+return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
+} else {
+return JVMTI_ERROR_INTERNAL;
+}
+}
+}
+return JVMTI_ERROR_NONE;
+}
+} /* end AddToSystemClassLoaderSearch */
+//
+// General functions
+//
+// phase_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
+*phase_ptr = get_phase();
+return JVMTI_ERROR_NONE;
+} /* end GetPhase */
+jvmtiError
+JvmtiEnv::DisposeEnvironment() {
+dispose();
+return JVMTI_ERROR_NONE;
+} /* end DisposeEnvironment */
+// data - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
+set_env_local_storage(data);
+return JVMTI_ERROR_NONE;
+} /* end SetEnvironmentLocalStorage */
+// data_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
+*data_ptr = (void*)get_env_local_storage();
+return JVMTI_ERROR_NONE;
+} /* end GetEnvironmentLocalStorage */
+// version_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetVersionNumber(jint* version_ptr) {
+*version_ptr = JVMTI_VERSION;
+return JVMTI_ERROR_NONE;
+} /* end GetVersionNumber */
+// name_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
+if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
+return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+}
+const char *name = JvmtiUtil::error_name(error);
+if (name == NULL) {
+return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+}
+size_t len = strlen(name) + 1;
+jvmtiError err = allocate(len, (unsigned char**)name_ptr);
+if (err == JVMTI_ERROR_NONE) {
+memcpy(*name_ptr, name, len);
+}
+return err;
+} /* end GetErrorName */
+jvmtiError
+JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
+switch (flag) {
+case JVMTI_VERBOSE_OTHER:
+// ignore
+break;
+case JVMTI_VERBOSE_CLASS:
+TraceClassLoading = value != 0;
+TraceClassUnloading = value != 0;
+break;
+case JVMTI_VERBOSE_GC:
+PrintGC = value != 0;
+TraceClassUnloading = value != 0;
+break;
+case JVMTI_VERBOSE_JNI:
+PrintJNIResolving = value != 0;
+break;
+default:
+return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+};
+return JVMTI_ERROR_NONE;
+} /* end SetVerboseFlag */
+// format_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
+*format_ptr = JVMTI_JLOCATION_JVMBCI;
+return JVMTI_ERROR_NONE;
+} /* end GetJLocationFormat */
+#ifndef JVMTI_KERNEL
+//
+// Thread functions
+//
+// Threads_lock NOT held
+// thread - NOT pre-checked
+// thread_state_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
+jint state;
+oop thread_oop;
+JavaThread* thr;
+if (thread == NULL) {
+thread_oop = JavaThread::current()->threadObj();
+} else {
+thread_oop = JNIHandles::resolve_external_guard(thread);
+}
+if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::thread_klass())) {
+return JVMTI_ERROR_INVALID_THREAD;
+}
+// get most state bits
+state = (jint)java_lang_Thread::get_thread_status(thread_oop);
+// add more state bits
+thr = java_lang_Thread::thread(thread_oop);
+if (thr != NULL) {
+JavaThreadState jts = thr->thread_state();
+if (thr->is_being_ext_suspended()) {
+state |= JVMTI_THREAD_STATE_SUSPENDED;
+}
+if (jts == _thread_in_native) {
+state |= JVMTI_THREAD_STATE_IN_NATIVE;
+}
+OSThread* osThread = thr->osthread();
+if (osThread != NULL && osThread->interrupted()) {
+state |= JVMTI_THREAD_STATE_INTERRUPTED;
+}
+}
+*thread_state_ptr = state;
+return JVMTI_ERROR_NONE;
+} /* end GetThreadState */
+// thread_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
+JavaThread* current_thread  = JavaThread::current();
+*thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
+return JVMTI_ERROR_NONE;
+} /* end GetCurrentThread */
+// threads_count_ptr - pre-checked for NULL
+// threads_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
+int nthreads        = 0;
+Handle *thread_objs = NULL;
+ResourceMark rm;
+HandleMark hm;
+// enumerate threads (including agent threads)
+ThreadsListEnumerator tle(Thread::current(), true);
+nthreads = tle.num_threads();
+*threads_count_ptr = nthreads;
+if (nthreads == 0) {
+*threads_ptr = NULL;
+return JVMTI_ERROR_NONE;
+}
+thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
+NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
+for (int i=0; i < nthreads; i++) {
+thread_objs[i] = Handle(tle.get_threadObj(i));
+}
+// have to make global handles outside of Threads_lock
+jthread *jthreads  = new_jthreadArray(nthreads, thread_objs);
+NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
+*threads_ptr = jthreads;
+return JVMTI_ERROR_NONE;
+} /* end GetAllThreads */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+jvmtiError
+JvmtiEnv::SuspendThread(JavaThread* java_thread) {
+// don't allow hidden thread suspend request.
+if (java_thread->is_hidden_from_external_view()) {
+return (JVMTI_ERROR_NONE);
+}
+{
+MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
+if (java_thread->is_external_suspend()) {
+// don't allow nested external suspend requests.
+return (JVMTI_ERROR_THREAD_SUSPENDED);
+}
+if (java_thread->is_exiting()) { // thread is in the process of exiting
+return (JVMTI_ERROR_THREAD_NOT_ALIVE);
+}
+java_thread->set_external_suspend();
+}
+if (!JvmtiSuspendControl::suspend(java_thread)) {
+// the thread was in the process of exiting
+return (JVMTI_ERROR_THREAD_NOT_ALIVE);
+}
+return JVMTI_ERROR_NONE;
+} /* end SuspendThread */
+// request_count - pre-checked to be greater than or equal to 0
+// request_list - pre-checked for NULL
+// results - pre-checked for NULL
+jvmtiError
+JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
+int needSafepoint = 0;  // > 0 if we need a safepoint
+for (int i = 0; i < request_count; i++) {
+JavaThread *java_thread = get_JavaThread(request_list[i]);
+if (java_thread == NULL) {
+results[i] = JVMTI_ERROR_INVALID_THREAD;
+continue;
+}
+// the thread has not yet run or has exited (not on threads list)
+if (java_thread->threadObj() == NULL) {
+results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
+continue;
+}
+if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) {
+results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
+continue;
+}
+// don't allow hidden thread suspend request.
+if (java_thread->is_hidden_from_external_view()) {
+results[i] = JVMTI_ERROR_NONE;  // indicate successful suspend
+continue;
+}
+{
+MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
+if (java_thread->is_external_suspend()) {
+// don't allow nested external suspend requests.
+results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
+continue;
+}
+if (java_thread->is_exiting()) { // thread is in the process of exiting
+results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
+continue;
+}
+java_thread->set_external_suspend();
+}
+if (java_thread->thread_state() == _thread_in_native) {
+// We need to try and suspend native threads here. Threads in
+// other states will self-suspend on their next transition.
+if (!JvmtiSuspendControl::suspend(java_thread)) {
+// The thread was in the process of exiting. Force another
+// safepoint to make sure that this thread transitions.
+needSafepoint++;
+results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
+continue;
+}
+} else {
+needSafepoint++;
+}
+results[i] = JVMTI_ERROR_NONE;  // indicate successful suspend
+}
+if (needSafepoint > 0) {
+VM_ForceSafepoint vfs;
+VMThread::execute(&vfs);
+}
+// per-thread suspend results returned via results parameter
+return JVMTI_ERROR_NONE;
+} /* end SuspendThreadList */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+jvmtiError
+JvmtiEnv::ResumeThread(JavaThread* java_thread) {
+// don't allow hidden thread resume request.
+if (java_thread->is_hidden_from_external_view()) {
+return JVMTI_ERROR_NONE;
+}
+if (!java_thread->is_being_ext_suspended()) {
+return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
+}
+if (!JvmtiSuspendControl::resume(java_thread)) {
+return JVMTI_ERROR_INTERNAL;
+}
+return JVMTI_ERROR_NONE;
+} /* end ResumeThread */
+// request_count - pre-checked to be greater than or equal to 0
+// request_list - pre-checked for NULL
+// results - pre-checked for NULL
+jvmtiError
+JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
+for (int i = 0; i < request_count; i++) {
+JavaThread *java_thread = get_JavaThread(request_list[i]);
+if (java_thread == NULL) {
+results[i] = JVMTI_ERROR_INVALID_THREAD;
+continue;
+}
+// don't allow hidden thread resume request.
+if (java_thread->is_hidden_from_external_view()) {
+results[i] = JVMTI_ERROR_NONE;  // indicate successful resume
+continue;
+}
+if (!java_thread->is_being_ext_suspended()) {
+results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
+continue;
+}
+if (!JvmtiSuspendControl::resume(java_thread)) {
+results[i] = JVMTI_ERROR_INTERNAL;
+continue;
+}
+results[i] = JVMTI_ERROR_NONE;  // indicate successful suspend
+}
+// per-thread resume results returned via results parameter
+return JVMTI_ERROR_NONE;
+} /* end ResumeThreadList */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+jvmtiError
+JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
+oop e = JNIHandles::resolve_external_guard(exception);
+NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
+JavaThread::send_async_exception(java_thread->threadObj(), e);
+return JVMTI_ERROR_NONE;
+} /* end StopThread */
+// Threads_lock NOT held
+// thread - NOT pre-checked
+jvmtiError
+JvmtiEnv::InterruptThread(jthread thread) {
+oop thread_oop = JNIHandles::resolve_external_guard(thread);
+if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::thread_klass()))
+return JVMTI_ERROR_INVALID_THREAD;
+JavaThread* current_thread  = JavaThread::current();
+// Todo: this is a duplicate of JVM_Interrupt; share code in future
+// Ensure that the C++ Thread and OSThread structures aren't freed before we operate
+MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock);
+// We need to re-resolve the java_thread, since a GC might have happened during the
+// acquire of the lock
+JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread));
+NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE);
+Thread::interrupt(java_thread);
+return JVMTI_ERROR_NONE;
+} /* end InterruptThread */
+// Threads_lock NOT held
+// thread - NOT pre-checked
+// info_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
+ResourceMark rm;
+HandleMark hm;
+JavaThread* current_thread = JavaThread::current();
+// if thread is NULL the current thread is used
+oop thread_oop;
+if (thread == NULL) {
+thread_oop = current_thread->threadObj();
+} else {
+thread_oop = JNIHandles::resolve_external_guard(thread);
+}
+if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::thread_klass()))
+return JVMTI_ERROR_INVALID_THREAD;
+Handle thread_obj(current_thread, thread_oop);
+typeArrayHandle    name;
+ThreadPriority priority;
+Handle     thread_group;
+Handle context_class_loader;
+bool          is_daemon;
+{ MutexLocker mu(Threads_lock);
+name = typeArrayHandle(current_thread, java_lang_Thread::name(thread_obj()));
+priority = java_lang_Thread::priority(thread_obj());
+thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
+is_daemon = java_lang_Thread::is_daemon(thread_obj());
+oop loader = java_lang_Thread::context_class_loader(thread_obj());
+context_class_loader = Handle(current_thread, loader);
+}
+{ const char *n;
+if (name() != NULL) {
+n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
+} else {
+n = UNICODE::as_utf8(NULL, 0);
+}
+info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
+if (info_ptr->name == NULL)
+return JVMTI_ERROR_OUT_OF_MEMORY;
+strcpy(info_ptr->name, n);
+}
+info_ptr->is_daemon = is_daemon;
+info_ptr->priority  = priority;
+info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
+jni_reference(context_class_loader);
+info_ptr->thread_group = jni_reference(thread_group);
+return JVMTI_ERROR_NONE;
+} /* end GetThreadInfo */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// owned_monitor_count_ptr - pre-checked for NULL
+// owned_monitors_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
+jvmtiError err = JVMTI_ERROR_NONE;
+JavaThread* calling_thread = JavaThread::current();
+// growable array of jvmti monitors info on the C-heap
+GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
+new (ResourceObj::C_HEAP) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
+uint32_t debug_bits = 0;
+if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
+err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
+} else {
+// JVMTI get monitors info at safepoint. Do not require target thread to
+// be suspended.
+VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
+VMThread::execute(&op);
+err = op.result();
+}
+jint owned_monitor_count = owned_monitors_list->length();
+if (err == JVMTI_ERROR_NONE) {
+if ((err = allocate(owned_monitor_count * sizeof(jobject *),
+(unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
+// copy into the returned array
+for (int i = 0; i < owned_monitor_count; i++) {
+(*owned_monitors_ptr)[i] =
+((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
+}
+*owned_monitor_count_ptr = owned_monitor_count;
+}
+}
+// clean up.
+for (int i = 0; i < owned_monitor_count; i++) {
+deallocate((unsigned char*)owned_monitors_list->at(i));
+}
+delete owned_monitors_list;
+return err;
+} /* end GetOwnedMonitorInfo */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// monitor_info_count_ptr - pre-checked for NULL
+// monitor_info_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
+jvmtiError err = JVMTI_ERROR_NONE;
+JavaThread* calling_thread  = JavaThread::current();
+// growable array of jvmti monitors info on the C-heap
+GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
+new (ResourceObj::C_HEAP) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
+uint32_t debug_bits = 0;
+if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
+err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
+} else {
+// JVMTI get owned monitors info at safepoint. Do not require target thread to
+// be suspended.
+VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
+VMThread::execute(&op);
+err = op.result();
+}
+jint owned_monitor_count = owned_monitors_list->length();
+if (err == JVMTI_ERROR_NONE) {
+if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
+(unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
+// copy to output array.
+for (int i = 0; i < owned_monitor_count; i++) {
+(*monitor_info_ptr)[i].monitor =
+((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
+(*monitor_info_ptr)[i].stack_depth =
+((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
+}
+}
+*monitor_info_count_ptr = owned_monitor_count;
+}
+// clean up.
+for (int i = 0; i < owned_monitor_count; i++) {
+deallocate((unsigned char*)owned_monitors_list->at(i));
+}
+delete owned_monitors_list;
+return err;
+} /* end GetOwnedMonitorStackDepthInfo */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// monitor_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
+jvmtiError err = JVMTI_ERROR_NONE;
+uint32_t debug_bits = 0;
+JavaThread* calling_thread  = JavaThread::current();
+if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
+err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
+} else {
+// get contended monitor information at safepoint.
+VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
+VMThread::execute(&op);
+err = op.result();
+}
+return err;
+} /* end GetCurrentContendedMonitor */
+// Threads_lock NOT held
+// thread - NOT pre-checked
+// proc - pre-checked for NULL
+// arg - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
+oop thread_oop = JNIHandles::resolve_external_guard(thread);
+if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::thread_klass())) {
+return JVMTI_ERROR_INVALID_THREAD;
+}
+if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
+return JVMTI_ERROR_INVALID_PRIORITY;
+}
+//Thread-self
+JavaThread* current_thread = JavaThread::current();
+Handle thread_hndl(current_thread, thread_oop);
+{
+MutexLocker mu(Threads_lock); // grab Threads_lock
+JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
+// At this point it may be possible that no osthread was created for the
+// JavaThread due to lack of memory.
+if (new_thread == NULL || new_thread->osthread() == NULL) {
+if (new_thread) delete new_thread;
+return JVMTI_ERROR_OUT_OF_MEMORY;
+}
+java_lang_Thread::set_thread(thread_hndl(), new_thread);
+java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
+java_lang_Thread::set_daemon(thread_hndl());
+new_thread->set_threadObj(thread_hndl());
+Threads::add(new_thread);
+Thread::start(new_thread);
+} // unlock Threads_lock
+return JVMTI_ERROR_NONE;
+} /* end RunAgentThread */
+//
+// Thread Group functions
+//
+// group_count_ptr - pre-checked for NULL
+// groups_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
+JavaThread* current_thread = JavaThread::current();
+// Only one top level thread group now.
+*group_count_ptr = 1;
+// Allocate memory to store global-refs to the thread groups.
+// Assume this area is freed by caller.
+*groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
+NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
+// Convert oop to Handle, then convert Handle to global-ref.
+{
+HandleMark hm(current_thread);
+Handle system_thread_group(current_thread, Universe::system_thread_group());
+*groups_ptr[0] = jni_reference(system_thread_group);
+}
+return JVMTI_ERROR_NONE;
+} /* end GetTopThreadGroups */
+// info_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
+ResourceMark rm;
+HandleMark hm;
+JavaThread* current_thread = JavaThread::current();
+Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
+NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
+typeArrayHandle name;
+Handle parent_group;
+bool is_daemon;
+ThreadPriority max_priority;
+{ MutexLocker mu(Threads_lock);
+name         = typeArrayHandle(current_thread,
+java_lang_ThreadGroup::name(group_obj()));
+parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
+is_daemon    = java_lang_ThreadGroup::is_daemon(group_obj());
+max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
+}
+info_ptr->is_daemon    = is_daemon;
+info_ptr->max_priority = max_priority;
+info_ptr->parent       = jni_reference(parent_group);
+if (name() != NULL) {
+const char* n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
+info_ptr->name = (char *)jvmtiMalloc(strlen(n)+1);
+NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
+strcpy(info_ptr->name, n);
+} else {
+info_ptr->name = NULL;
+}
+return JVMTI_ERROR_NONE;
+} /* end GetThreadGroupInfo */
+// thread_count_ptr - pre-checked for NULL
+// threads_ptr - pre-checked for NULL
+// group_count_ptr - pre-checked for NULL
+// groups_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
+JavaThread* current_thread = JavaThread::current();
+oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
+NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
+Handle *thread_objs = NULL;
+Handle *group_objs  = NULL;
+int nthreads = 0;
+int ngroups = 0;
+int hidden_threads = 0;
+ResourceMark rm;
+HandleMark hm;
+Handle group_hdl(current_thread, group_obj);
+{ MutexLocker mu(Threads_lock);
+nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
+ngroups  = java_lang_ThreadGroup::ngroups(group_hdl());
+if (nthreads > 0) {
+objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
+assert(nthreads <= threads->length(), "too many threads");
+thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
+for (int i=0, j=0; i<nthreads; i++) {
+oop thread_obj = threads->obj_at(i);
+assert(thread_obj != NULL, "thread_obj is NULL");
+JavaThread *javathread = java_lang_Thread::thread(thread_obj);
+// Filter out hidden java threads.
+if (javathread != NULL && javathread->is_hidden_from_external_view()) {
+hidden_threads++;
+continue;
+}
+thread_objs[j++] = Handle(current_thread, thread_obj);
+}
+nthreads -= hidden_threads;
+}
+if (ngroups > 0) {
+objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
+assert(ngroups <= groups->length(), "too many threads");
+group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
+for (int i=0; i<ngroups; i++) {
+oop group_obj = groups->obj_at(i);
+assert(group_obj != NULL, "group_obj != NULL");
+group_objs[i] = Handle(current_thread, group_obj);
+}
+}
+}
+// have to make global handles outside of Threads_lock
+*group_count_ptr  = ngroups;
+*thread_count_ptr = nthreads;
+*threads_ptr     = new_jthreadArray(nthreads, thread_objs);
+*groups_ptr      = new_jthreadGroupArray(ngroups, group_objs);
+if ((nthreads > 0) && (*threads_ptr == NULL)) {
+return JVMTI_ERROR_OUT_OF_MEMORY;
+}
+if ((ngroups > 0) && (*groups_ptr == NULL)) {
+return JVMTI_ERROR_OUT_OF_MEMORY;
+}
+return JVMTI_ERROR_NONE;
+} /* end GetThreadGroupChildren */
+//
+// Stack Frame functions
+//
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// max_frame_count - pre-checked to be greater than or equal to 0
+// frame_buffer - pre-checked for NULL
+// count_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
+jvmtiError err = JVMTI_ERROR_NONE;
+uint32_t debug_bits = 0;
+if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
+err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
+} else {
+// JVMTI get stack trace at safepoint. Do not require target thread to
+// be suspended.
+VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
+VMThread::execute(&op);
+err = op.result();
+}
+return err;
+} /* end GetStackTrace */
+// max_frame_count - pre-checked to be greater than or equal to 0
+// stack_info_ptr - pre-checked for NULL
+// thread_count_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
+jvmtiError err = JVMTI_ERROR_NONE;
+JavaThread* calling_thread = JavaThread::current();
+// JVMTI get stack traces at safepoint.
+VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
+VMThread::execute(&op);
+*thread_count_ptr = op.final_thread_count();
+*stack_info_ptr = op.stack_info();
+err = op.result();
+return err;
+} /* end GetAllStackTraces */
+// thread_count - pre-checked to be greater than or equal to 0
+// thread_list - pre-checked for NULL
+// max_frame_count - pre-checked to be greater than or equal to 0
+// stack_info_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
+jvmtiError err = JVMTI_ERROR_NONE;
+// JVMTI get stack traces at safepoint.
+VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
+VMThread::execute(&op);
+err = op.result();
+if (err == JVMTI_ERROR_NONE) {
+*stack_info_ptr = op.stack_info();
+}
+return err;
+} /* end GetThreadListStackTraces */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// count_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
+jvmtiError err = JVMTI_ERROR_NONE;
+// retrieve or create JvmtiThreadState.
+JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
+uint32_t debug_bits = 0;
+if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
+err = get_frame_count(state, count_ptr);
+} else {
+// get java stack frame count at safepoint.
+VM_GetFrameCount op(this, state, count_ptr);
+VMThread::execute(&op);
+err = op.result();
+}
+return err;
+} /* end GetFrameCount */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+jvmtiError
+JvmtiEnv::PopFrame(JavaThread* java_thread) {
+JavaThread* current_thread  = JavaThread::current();
+HandleMark hm(current_thread);
+uint32_t debug_bits = 0;
+// Check if java_thread is fully suspended
+if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) {
+return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
+}
+// Check to see if a PopFrame was already in progress
+if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
+// Probably possible for JVMTI clients to trigger this, but the
+// JPDA backend shouldn't allow this to happen
+return JVMTI_ERROR_INTERNAL;
+}
+{
+// Was workaround bug
+//    4812902: popFrame hangs if the method is waiting at a synchronize
+// Catch this condition and return an error to avoid hanging.
+// Now JVMTI spec allows an implementation to bail out with an opaque frame error.
+OSThread* osThread = java_thread->osthread();
+if (osThread->get_state() == MONITOR_WAIT) {
+return JVMTI_ERROR_OPAQUE_FRAME;
+}
+}
+{
+ResourceMark rm(current_thread);
+// Check if there are more than one Java frame in this thread, that the top two frames
+// are Java (not native) frames, and that there is no intervening VM frame
+int frame_count = 0;
+bool is_interpreted[2];
+intptr_t *frame_sp[2];
+// The 2-nd arg of constructor is needed to stop iterating at java entry frame.
+for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
+methodHandle mh(current_thread, vfs.method());
+if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
+is_interpreted[frame_count] = vfs.is_interpreted_frame();
+frame_sp[frame_count] = vfs.frame_id();
+if (++frame_count > 1) break;
+}
+if (frame_count < 2)  {
+// We haven't found two adjacent non-native Java frames on the top.
+// There can be two situations here:
+//  1. There are no more java frames
+//  2. Two top java frames are separated by non-java native frames
+if(vframeFor(java_thread, 1) == NULL) {
+return JVMTI_ERROR_NO_MORE_FRAMES;
+} else {
+// Intervening non-java native or VM frames separate java frames.
+// Current implementation does not support this. See bug #5031735.
+// In theory it is possible to pop frames in such cases.
+return JVMTI_ERROR_OPAQUE_FRAME;
+}
+}
+// If any of the top 2 frames is a compiled one, need to deoptimize it
+for (int i = 0; i < 2; i++) {
+if (!is_interpreted[i]) {
+VM_DeoptimizeFrame op(java_thread, frame_sp[i]);
+VMThread::execute(&op);
+}
+}
+// Update the thread state to reflect that the top frame is popped
+// so that cur_stack_depth is maintained properly and all frameIDs
+// are invalidated.
+// The current frame will be popped later when the suspended thread
+// is resumed and right before returning from VM to Java.
+// (see call_VM_base() in assembler_<cpu>.cpp).
+// It's fine to update the thread state here because no JVMTI events
+// shall be posted for this PopFrame.
+// retreive or create the state
+JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
+state->update_for_pop_top_frame();
+java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
+// Set pending step flag for this popframe and it is cleared when next
+// step event is posted.
+state->set_pending_step_for_popframe();
+}
+return JVMTI_ERROR_NONE;
+} /* end PopFrame */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// java_thread - unchecked
+// depth - pre-checked as non-negative
+// method_ptr - pre-checked for NULL
+// location_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
+jvmtiError err = JVMTI_ERROR_NONE;
+uint32_t debug_bits = 0;
+if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
+err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
+} else {
+// JVMTI get java stack frame location at safepoint.
+VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
+VMThread::execute(&op);
+err = op.result();
+}
+return err;
+} /* end GetFrameLocation */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// java_thread - unchecked
+// depth - pre-checked as non-negative
+jvmtiError
+JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
+ResourceMark rm;
+uint32_t debug_bits = 0;
+if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) {
+return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
+}
+if (TraceJVMTICalls) {
+JvmtiSuspendControl::print();
+}
+vframe *vf = vframeFor(java_thread, depth);
+if (vf == NULL) {
+return JVMTI_ERROR_NO_MORE_FRAMES;
+}
+if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
+return JVMTI_ERROR_OPAQUE_FRAME;
+}
+assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
+JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
+int frame_number = state->count_frames() - depth;
+state->env_thread_state(this)->set_frame_pop(frame_number);
+return JVMTI_ERROR_NONE;
+} /* end NotifyFramePop */
+//
+// Force Early Return functions
+//
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+jvmtiError
+JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
+jvalue val;
+val.l = value;
+return force_early_return(java_thread, val, atos);
+} /* end ForceEarlyReturnObject */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+jvmtiError
+JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
+jvalue val;
+val.i = value;
+return force_early_return(java_thread, val, itos);
+} /* end ForceEarlyReturnInt */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+jvmtiError
+JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
+jvalue val;
+val.j = value;
+return force_early_return(java_thread, val, ltos);
+} /* end ForceEarlyReturnLong */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+jvmtiError
+JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
+jvalue val;
+val.f = value;
+return force_early_return(java_thread, val, ftos);
+} /* end ForceEarlyReturnFloat */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+jvmtiError
+JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
+jvalue val;
+val.d = value;
+return force_early_return(java_thread, val, dtos);
+} /* end ForceEarlyReturnDouble */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+jvmtiError
+JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
+jvalue val;
+val.j = 0L;
+return force_early_return(java_thread, val, vtos);
+} /* end ForceEarlyReturnVoid */
+//
+// Heap functions
+//
+// klass - NULL is a valid value, must be checked
+// initial_object - NULL is a valid value, must be checked
+// callbacks - pre-checked for NULL
+// user_data - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
+// check klass if provided
+klassOop k_oop = NULL;
+if (klass != NULL) {
+oop k_mirror = JNIHandles::resolve_external_guard(klass);
+if (k_mirror == NULL) {
+return JVMTI_ERROR_INVALID_CLASS;
+}
+if (java_lang_Class::is_primitive(k_mirror)) {
+return JVMTI_ERROR_NONE;
+}
+k_oop = java_lang_Class::as_klassOop(k_mirror);
+if (k_oop == NULL) {
+return JVMTI_ERROR_INVALID_CLASS;
+}
+}
+Thread *thread = Thread::current();
+HandleMark hm(thread);
+KlassHandle kh (thread, k_oop);
+TraceTime t("FollowReferences", TraceJVMTIObjectTagging);
+JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
+return JVMTI_ERROR_NONE;
+} /* end FollowReferences */
+// klass - NULL is a valid value, must be checked
+// callbacks - pre-checked for NULL
+// user_data - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
+// check klass if provided
+klassOop k_oop = NULL;
+if (klass != NULL) {
+oop k_mirror = JNIHandles::resolve_external_guard(klass);
+if (k_mirror == NULL) {
+return JVMTI_ERROR_INVALID_CLASS;
+}
+if (java_lang_Class::is_primitive(k_mirror)) {
+return JVMTI_ERROR_NONE;
+}
+k_oop = java_lang_Class::as_klassOop(k_mirror);
+if (k_oop == NULL) {
+return JVMTI_ERROR_INVALID_CLASS;
+}
+}
+Thread *thread = Thread::current();
+HandleMark hm(thread);
+KlassHandle kh (thread, k_oop);
+TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging);
+JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
+return JVMTI_ERROR_NONE;
+} /* end IterateThroughHeap */
+// tag_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
+oop o = JNIHandles::resolve_external_guard(object);
+NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
+*tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
+return JVMTI_ERROR_NONE;
+} /* end GetTag */
+jvmtiError
+JvmtiEnv::SetTag(jobject object, jlong tag) {
+oop o = JNIHandles::resolve_external_guard(object);
+NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
+JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
+return JVMTI_ERROR_NONE;
+} /* end SetTag */
+// tag_count - pre-checked to be greater than or equal to 0
+// tags - pre-checked for NULL
+// count_ptr - pre-checked for NULL
+// object_result_ptr - NULL is a valid value, must be checked
+// tag_result_ptr - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
+TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging);
+return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
+} /* end GetObjectsWithTags */
+jvmtiError
+JvmtiEnv::ForceGarbageCollection() {
+Universe::heap()->collect(GCCause::_jvmti_force_gc);
+return JVMTI_ERROR_NONE;
+} /* end ForceGarbageCollection */
+//
+// Heap (1.0) functions
+//
+// object_reference_callback - pre-checked for NULL
+// user_data - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
+oop o = JNIHandles::resolve_external_guard(object);
+NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
+JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
+return JVMTI_ERROR_NONE;
+} /* end IterateOverObjectsReachableFromObject */
+// heap_root_callback - NULL is a valid value, must be checked
+// stack_ref_callback - NULL is a valid value, must be checked
+// object_ref_callback - NULL is a valid value, must be checked
+// user_data - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
+TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging);
+JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
+return JVMTI_ERROR_NONE;
+} /* end IterateOverReachableObjects */
+// heap_object_callback - pre-checked for NULL
+// user_data - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
+TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging);
+Thread *thread = Thread::current();
+HandleMark hm(thread);
+JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
+return JVMTI_ERROR_NONE;
+} /* end IterateOverHeap */
+// k_mirror - may be primitive, this must be checked
+// heap_object_callback - pre-checked for NULL
+// user_data - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
+if (java_lang_Class::is_primitive(k_mirror)) {
+// DO PRIMITIVE CLASS PROCESSING
+return JVMTI_ERROR_NONE;
+}
+klassOop k_oop = java_lang_Class::as_klassOop(k_mirror);
+if (k_oop == NULL) {
+return JVMTI_ERROR_INVALID_CLASS;
+}
+Thread *thread = Thread::current();
+HandleMark hm(thread);
+KlassHandle klass (thread, k_oop);
+TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging);
+JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
+return JVMTI_ERROR_NONE;
+} /* end IterateOverInstancesOfClass */
+//
+// Local Variable functions
+//
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// java_thread - unchecked
+// depth - pre-checked as non-negative
+// value_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
+JavaThread* current_thread = JavaThread::current();
+// rm object is created to clean up the javaVFrame created in
+// doit_prologue(), but after doit() is finished with it.
+ResourceMark rm(current_thread);
+VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
+VMThread::execute(&op);
+jvmtiError err = op.result();
+if (err != JVMTI_ERROR_NONE) {
+return err;
+} else {
+*value_ptr = op.value().l;
+return JVMTI_ERROR_NONE;
+}
+} /* end GetLocalObject */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// java_thread - unchecked
+// depth - pre-checked as non-negative
+// value_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
+// rm object is created to clean up the javaVFrame created in
+// doit_prologue(), but after doit() is finished with it.
+ResourceMark rm;
+VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
+VMThread::execute(&op);
+*value_ptr = op.value().i;
+return op.result();
+} /* end GetLocalInt */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// java_thread - unchecked
+// depth - pre-checked as non-negative
+// value_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
+// rm object is created to clean up the javaVFrame created in
+// doit_prologue(), but after doit() is finished with it.
+ResourceMark rm;
+VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
+VMThread::execute(&op);
+*value_ptr = op.value().j;
+return op.result();
+} /* end GetLocalLong */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// java_thread - unchecked
+// depth - pre-checked as non-negative
+// value_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
+// rm object is created to clean up the javaVFrame created in
+// doit_prologue(), but after doit() is finished with it.
+ResourceMark rm;
+VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
+VMThread::execute(&op);
+*value_ptr = op.value().f;
+return op.result();
+} /* end GetLocalFloat */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// java_thread - unchecked
+// depth - pre-checked as non-negative
+// value_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
+// rm object is created to clean up the javaVFrame created in
+// doit_prologue(), but after doit() is finished with it.
+ResourceMark rm;
+VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
+VMThread::execute(&op);
+*value_ptr = op.value().d;
+return op.result();
+} /* end GetLocalDouble */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// java_thread - unchecked
+// depth - pre-checked as non-negative
+jvmtiError
+JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
+// rm object is created to clean up the javaVFrame created in
+// doit_prologue(), but after doit() is finished with it.
+ResourceMark rm;
+jvalue val;
+val.l = value;
+VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
+VMThread::execute(&op);
+return op.result();
+} /* end SetLocalObject */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// java_thread - unchecked
+// depth - pre-checked as non-negative
+jvmtiError
+JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
+// rm object is created to clean up the javaVFrame created in
+// doit_prologue(), but after doit() is finished with it.
+ResourceMark rm;
+jvalue val;
+val.i = value;
+VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
+VMThread::execute(&op);
+return op.result();
+} /* end SetLocalInt */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// java_thread - unchecked
+// depth - pre-checked as non-negative
+jvmtiError
+JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
+// rm object is created to clean up the javaVFrame created in
+// doit_prologue(), but after doit() is finished with it.
+ResourceMark rm;
+jvalue val;
+val.j = value;
+VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
+VMThread::execute(&op);
+return op.result();
+} /* end SetLocalLong */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// java_thread - unchecked
+// depth - pre-checked as non-negative
+jvmtiError
+JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
+// rm object is created to clean up the javaVFrame created in
+// doit_prologue(), but after doit() is finished with it.
+ResourceMark rm;
+jvalue val;
+val.f = value;
+VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
+VMThread::execute(&op);
+return op.result();
+} /* end SetLocalFloat */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// java_thread - unchecked
+// depth - pre-checked as non-negative
+jvmtiError
+JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
+// rm object is created to clean up the javaVFrame created in
+// doit_prologue(), but after doit() is finished with it.
+ResourceMark rm;
+jvalue val;
+val.d = value;
+VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
+VMThread::execute(&op);
+return op.result();
+} /* end SetLocalDouble */
+//
+// Breakpoint functions
+//
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+jvmtiError
+JvmtiEnv::SetBreakpoint(methodOop method_oop, jlocation location) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+if (location < 0) {   // simple invalid location check first
+return JVMTI_ERROR_INVALID_LOCATION;
+}
+// verify that the breakpoint is not past the end of the method
+if (location >= (jlocation) method_oop->code_size()) {
+return JVMTI_ERROR_INVALID_LOCATION;
+}
+ResourceMark rm;
+JvmtiBreakpoint bp(method_oop, location);
+JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
+if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
+return JVMTI_ERROR_DUPLICATE;
+if (TraceJVMTICalls) {
+jvmti_breakpoints.print();
+}
+return JVMTI_ERROR_NONE;
+} /* end SetBreakpoint */
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+jvmtiError
+JvmtiEnv::ClearBreakpoint(methodOop method_oop, jlocation location) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+if (location < 0) {   // simple invalid location check first
+return JVMTI_ERROR_INVALID_LOCATION;
+}
+// verify that the breakpoint is not past the end of the method
+if (location >= (jlocation) method_oop->code_size()) {
+return JVMTI_ERROR_INVALID_LOCATION;
+}
+JvmtiBreakpoint bp(method_oop, location);
+JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
+if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
+return JVMTI_ERROR_NOT_FOUND;
+if (TraceJVMTICalls) {
+jvmti_breakpoints.print();
+}
+return JVMTI_ERROR_NONE;
+} /* end ClearBreakpoint */
+//
+// Watched Field functions
+//
+jvmtiError
+JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
+// make sure we haven't set this watch before
+if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
+fdesc_ptr->set_is_field_access_watched(true);
+update_klass_field_access_flag(fdesc_ptr);
+JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
+return JVMTI_ERROR_NONE;
+} /* end SetFieldAccessWatch */
+jvmtiError
+JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
+// make sure we have a watch to clear
+if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
+fdesc_ptr->set_is_field_access_watched(false);
+update_klass_field_access_flag(fdesc_ptr);
+JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
+return JVMTI_ERROR_NONE;
+} /* end ClearFieldAccessWatch */
+jvmtiError
+JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
+// make sure we haven't set this watch before
+if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
+fdesc_ptr->set_is_field_modification_watched(true);
+update_klass_field_access_flag(fdesc_ptr);
+JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
+return JVMTI_ERROR_NONE;
+} /* end SetFieldModificationWatch */
+jvmtiError
+JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
+// make sure we have a watch to clear
+if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
+fdesc_ptr->set_is_field_modification_watched(false);
+update_klass_field_access_flag(fdesc_ptr);
+JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
+return JVMTI_ERROR_NONE;
+} /* end ClearFieldModificationWatch */
+//
+// Class functions
+//
+// k_mirror - may be primitive, this must be checked
+// signature_ptr - NULL is a valid value, must be checked
+// generic_ptr - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
+ResourceMark rm;
+bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
+klassOop k = NULL;
+if (!isPrimitive) {
+k = java_lang_Class::as_klassOop(k_mirror);
+NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+}
+if (signature_ptr != NULL) {
+char* result = NULL;
+if (isPrimitive) {
+char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
+result = (char*) jvmtiMalloc(2);
+result[0] = tchar;
+result[1] = '\0';
+} else {
+const char* class_sig = Klass::cast(k)->signature_name();
+result = (char *) jvmtiMalloc(strlen(class_sig)+1);
+strcpy(result, class_sig);
+}
+*signature_ptr = result;
+}
+if (generic_ptr != NULL) {
+*generic_ptr = NULL;
+if (!isPrimitive && Klass::cast(k)->oop_is_instance()) {
+symbolOop soo = instanceKlass::cast(k)->generic_signature();
+if (soo != NULL) {
+const char *gen_sig = soo->as_C_string();
+if (gen_sig != NULL) {
+char* gen_result;
+jvmtiError err = allocate(strlen(gen_sig) + 1,
+(unsigned char **)&gen_result);
+if (err != JVMTI_ERROR_NONE) {
+return err;
+}
+strcpy(gen_result, gen_sig);
+*generic_ptr = gen_result;
+}
+}
+}
+}
+return JVMTI_ERROR_NONE;
+} /* end GetClassSignature */
+// k_mirror - may be primitive, this must be checked
+// status_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
+jint result = 0;
+if (java_lang_Class::is_primitive(k_mirror)) {
+result |= JVMTI_CLASS_STATUS_PRIMITIVE;
+} else {
+klassOop k = java_lang_Class::as_klassOop(k_mirror);
+NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+result = Klass::cast(k)->jvmti_class_status();
+}
+*status_ptr = result;
+return JVMTI_ERROR_NONE;
+} /* end GetClassStatus */
+// k_mirror - may be primitive, this must be checked
+// source_name_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
+if (java_lang_Class::is_primitive(k_mirror)) {
+return JVMTI_ERROR_ABSENT_INFORMATION;
+}
+klassOop k_klass = java_lang_Class::as_klassOop(k_mirror);
+NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
+if (!Klass::cast(k_klass)->oop_is_instance()) {
+return JVMTI_ERROR_ABSENT_INFORMATION;
+}
+symbolOop sfnOop = instanceKlass::cast(k_klass)->source_file_name();
+NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
+{
+JavaThread* current_thread  = JavaThread::current();
+ResourceMark rm(current_thread);
+const char* sfncp = (const char*) sfnOop->as_C_string();
+*source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
+strcpy(*source_name_ptr, sfncp);
+}
+return JVMTI_ERROR_NONE;
+} /* end GetSourceFileName */
+// k_mirror - may be primitive, this must be checked
+// modifiers_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
+JavaThread* current_thread  = JavaThread::current();
+jint result = 0;
+if (!java_lang_Class::is_primitive(k_mirror)) {
+klassOop k = java_lang_Class::as_klassOop(k_mirror);
+NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+assert((Klass::cast(k)->oop_is_instance() || Klass::cast(k)->oop_is_array()), "should be an instance or an array klass");
+result = Klass::cast(k)->compute_modifier_flags(current_thread);
+JavaThread* THREAD = current_thread; // pass to macros
+if (HAS_PENDING_EXCEPTION) {
+CLEAR_PENDING_EXCEPTION;
+return JVMTI_ERROR_INTERNAL;
+};
+// Reset the deleted  ACC_SUPER bit ( deleted in compute_modifier_flags()).
+if(Klass::cast(k)->is_super()) {
+result |= JVM_ACC_SUPER;
+}
+} else {
+result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
+}
+*modifiers_ptr = result;
+return JVMTI_ERROR_NONE;
+} /* end GetClassModifiers */
+// k_mirror - may be primitive, this must be checked
+// method_count_ptr - pre-checked for NULL
+// methods_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
+JavaThread* current_thread  = JavaThread::current();
+HandleMark hm(current_thread);
+if (java_lang_Class::is_primitive(k_mirror)) {
+*method_count_ptr = 0;
+*methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
+return JVMTI_ERROR_NONE;
+}
+klassOop k = java_lang_Class::as_klassOop(k_mirror);
+NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+// Return CLASS_NOT_PREPARED error as per JVMTI spec.
+if (!(Klass::cast(k)->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
+return JVMTI_ERROR_CLASS_NOT_PREPARED;
+}
+if (!Klass::cast(k)->oop_is_instance()) {
+*method_count_ptr = 0;
+*methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
+return JVMTI_ERROR_NONE;
+}
+instanceKlassHandle instanceK_h(current_thread, k);
+// Allocate the result and fill it in
+int result_length = instanceK_h->methods()->length();
+jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
+int index;
+if (JvmtiExport::can_maintain_original_method_order()) {
+// Use the original method ordering indices stored in the class, so we can emit
+// jmethodIDs in the order they appeared in the class file
+for (index = 0; index < result_length; index++) {
+methodOop m = methodOop(instanceK_h->methods()->obj_at(index));
+int original_index = instanceK_h->method_ordering()->int_at(index);
+assert(original_index >= 0 && original_index < result_length, "invalid original method index");
+jmethodID id = m->jmethod_id();
+result_list[original_index] = id;
+}
+} else {
+// otherwise just copy in any order
+for (index = 0; index < result_length; index++) {
+methodOop m = methodOop(instanceK_h->methods()->obj_at(index));
+jmethodID id = m->jmethod_id();
+result_list[index] = id;
+}
+}
+// Fill in return value.
+*method_count_ptr = result_length;
+*methods_ptr = result_list;
+return JVMTI_ERROR_NONE;
+} /* end GetClassMethods */
+// k_mirror - may be primitive, this must be checked
+// field_count_ptr - pre-checked for NULL
+// fields_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
+if (java_lang_Class::is_primitive(k_mirror)) {
+*field_count_ptr = 0;
+*fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
+return JVMTI_ERROR_NONE;
+}
+JavaThread* current_thread = JavaThread::current();
+HandleMark hm(current_thread);
+klassOop k = java_lang_Class::as_klassOop(k_mirror);
+NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+// Return CLASS_NOT_PREPARED error as per JVMTI spec.
+if (!(Klass::cast(k)->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
+return JVMTI_ERROR_CLASS_NOT_PREPARED;
+}
+if (!Klass::cast(k)->oop_is_instance()) {
+*field_count_ptr = 0;
+*fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
+return JVMTI_ERROR_NONE;
+}
+instanceKlassHandle instanceK_h(current_thread, k);
+int result_count = 0;
+// First, count the fields.
+FilteredFieldStream flds(instanceK_h, true, true);
+result_count = flds.field_count();
+// Allocate the result and fill it in
+jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
+// The JVMTI spec requires fields in the order they occur in the class file,
+// this is the reverse order of what FieldStream hands out.
+int id_index = (result_count - 1);
+for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
+result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
+instanceK_h, src_st.offset(),
+src_st.access_flags().is_static());
+}
+assert(id_index == -1, "just checking");
+// Fill in the results
+*field_count_ptr = result_count;
+*fields_ptr = result_list;
+return JVMTI_ERROR_NONE;
+} /* end GetClassFields */
+// k_mirror - may be primitive, this must be checked
+// interface_count_ptr - pre-checked for NULL
+// interfaces_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
+{
+if (java_lang_Class::is_primitive(k_mirror)) {
+*interface_count_ptr = 0;
+*interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
+return JVMTI_ERROR_NONE;
+}
+JavaThread* current_thread = JavaThread::current();
+HandleMark hm(current_thread);
+klassOop k = java_lang_Class::as_klassOop(k_mirror);
+NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+// Return CLASS_NOT_PREPARED error as per JVMTI spec.
+if (!(Klass::cast(k)->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
+return JVMTI_ERROR_CLASS_NOT_PREPARED;
+if (!Klass::cast(k)->oop_is_instance()) {
+*interface_count_ptr = 0;
+*interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
+return JVMTI_ERROR_NONE;
+}
+objArrayHandle interface_list(current_thread, instanceKlass::cast(k)->local_interfaces());
+const int result_length = (interface_list.is_null() ? 0 : interface_list->length());
+jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
+for (int i_index = 0; i_index < result_length; i_index += 1) {
+oop oop_at = interface_list->obj_at(i_index);
+assert(oop_at->is_klass(), "interfaces must be klassOops");
+klassOop klassOop_at = klassOop(oop_at);      // ???: is there a better way?
+assert(Klass::cast(klassOop_at)->is_interface(), "interfaces must be interfaces");
+oop mirror_at = Klass::cast(klassOop_at)->java_mirror();
+Handle handle_at = Handle(current_thread, mirror_at);
+result_list[i_index] = (jclass) jni_reference(handle_at);
+}
+*interface_count_ptr = result_length;
+*interfaces_ptr = result_list;
+}
+return JVMTI_ERROR_NONE;
+} /* end GetImplementedInterfaces */
+// k_mirror - may be primitive, this must be checked
+// minor_version_ptr - pre-checked for NULL
+// major_version_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
+if (java_lang_Class::is_primitive(k_mirror)) {
+return JVMTI_ERROR_ABSENT_INFORMATION;
+}
+klassOop k_oop = java_lang_Class::as_klassOop(k_mirror);
+Thread *thread = Thread::current();
+HandleMark hm(thread);
+KlassHandle klass(thread, k_oop);
+jint status = klass->jvmti_class_status();
+if (status & (JVMTI_CLASS_STATUS_ERROR)) {
+return JVMTI_ERROR_INVALID_CLASS;
+}
+if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
+return JVMTI_ERROR_ABSENT_INFORMATION;
+}
+instanceKlassHandle ik(thread, k_oop);
+*minor_version_ptr = ik->minor_version();
+*major_version_ptr = ik->major_version();
+return JVMTI_ERROR_NONE;
+} /* end GetClassVersionNumbers */
+// k_mirror - may be primitive, this must be checked
+// constant_pool_count_ptr - pre-checked for NULL
+// constant_pool_byte_count_ptr - pre-checked for NULL
+// constant_pool_bytes_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
+if (java_lang_Class::is_primitive(k_mirror)) {
+return JVMTI_ERROR_ABSENT_INFORMATION;
+}
+klassOop k_oop = java_lang_Class::as_klassOop(k_mirror);
+Thread *thread = Thread::current();
+HandleMark hm(thread);
+ResourceMark rm(thread);
+KlassHandle klass(thread, k_oop);
+jint status = klass->jvmti_class_status();
+if (status & (JVMTI_CLASS_STATUS_ERROR)) {
+return JVMTI_ERROR_INVALID_CLASS;
+}
+if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
+return JVMTI_ERROR_ABSENT_INFORMATION;
+}
+instanceKlassHandle ikh(thread, k_oop);
+constantPoolHandle  constants(thread, ikh->constants());
+ObjectLocker ol(constants, thread);    // lock constant pool while we query it
+JvmtiConstantPoolReconstituter reconstituter(ikh);
+if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
+return reconstituter.get_error();
+}
+unsigned char *cpool_bytes;
+int cpool_size = reconstituter.cpool_size();
+if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
+return reconstituter.get_error();
+}
+jvmtiError res = allocate(cpool_size, &cpool_bytes);
+if (res != JVMTI_ERROR_NONE) {
+return res;
+}
+reconstituter.copy_cpool_bytes(cpool_bytes);
+if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
+return reconstituter.get_error();
+}
+*constant_pool_count_ptr      = constants->length();
+*constant_pool_byte_count_ptr = cpool_size;
+*constant_pool_bytes_ptr      = cpool_bytes;
+return JVMTI_ERROR_NONE;
+} /* end GetConstantPool */
+// k_mirror - may be primitive, this must be checked
+// is_interface_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
+{
+bool result = false;
+if (!java_lang_Class::is_primitive(k_mirror)) {
+klassOop k = java_lang_Class::as_klassOop(k_mirror);
+if (k != NULL && Klass::cast(k)->is_interface()) {
+result = true;
+}
+}
+*is_interface_ptr = result;
+}
+return JVMTI_ERROR_NONE;
+} /* end IsInterface */
+// k_mirror - may be primitive, this must be checked
+// is_array_class_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
+{
+bool result = false;
+if (!java_lang_Class::is_primitive(k_mirror)) {
+klassOop k = java_lang_Class::as_klassOop(k_mirror);
+if (k != NULL && Klass::cast(k)->oop_is_array()) {
+result = true;
+}
+}
+*is_array_class_ptr = result;
+}
+return JVMTI_ERROR_NONE;
+} /* end IsArrayClass */
+// k_mirror - may be primitive, this must be checked
+// classloader_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
+{
+if (java_lang_Class::is_primitive(k_mirror)) {
+*classloader_ptr = (jclass) jni_reference(Handle());
+return JVMTI_ERROR_NONE;
+}
+JavaThread* current_thread = JavaThread::current();
+HandleMark hm(current_thread);
+klassOop k = java_lang_Class::as_klassOop(k_mirror);
+NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+oop result_oop = Klass::cast(k)->class_loader();
+if (result_oop == NULL) {
+*classloader_ptr = (jclass) jni_reference(Handle());
+return JVMTI_ERROR_NONE;
+}
+Handle result_handle = Handle(current_thread, result_oop);
+jclass result_jnihandle = (jclass) jni_reference(result_handle);
+*classloader_ptr = result_jnihandle;
+}
+return JVMTI_ERROR_NONE;
+} /* end GetClassLoader */
+// k_mirror - may be primitive, this must be checked
+// source_debug_extension_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
+{
+if (java_lang_Class::is_primitive(k_mirror)) {
+return JVMTI_ERROR_ABSENT_INFORMATION;
+}
+klassOop k = java_lang_Class::as_klassOop(k_mirror);
+NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+if (!Klass::cast(k)->oop_is_instance()) {
+return JVMTI_ERROR_ABSENT_INFORMATION;
+}
+symbolOop sdeOop = instanceKlass::cast(k)->source_debug_extension();
+NULL_CHECK(sdeOop, JVMTI_ERROR_ABSENT_INFORMATION);
+{
+JavaThread* current_thread  = JavaThread::current();
+ResourceMark rm(current_thread);
+const char* sdecp = (const char*) sdeOop->as_C_string();
+*source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sdecp)+1);
+strcpy(*source_debug_extension_ptr, sdecp);
+}
+}
+return JVMTI_ERROR_NONE;
+} /* end GetSourceDebugExtension */
+//
+// Object functions
+//
+// hash_code_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
+oop mirror = JNIHandles::resolve_external_guard(object);
+NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
+NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
+{
+jint result = (jint) mirror->identity_hash();
+*hash_code_ptr = result;
+}
+return JVMTI_ERROR_NONE;
+} /* end GetObjectHashCode */
+// info_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
+JavaThread* calling_thread = JavaThread::current();
+jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
+if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
+// Some of the critical threads were not suspended. go to a safepoint and try again
+VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
+VMThread::execute(&op);
+err = op.result();
+}
+return err;
+} /* end GetObjectMonitorUsage */
+//
+// Field functions
+//
+// name_ptr - NULL is a valid value, must be checked
+// signature_ptr - NULL is a valid value, must be checked
+// generic_ptr - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
+JavaThread* current_thread  = JavaThread::current();
+ResourceMark rm(current_thread);
+if (name_ptr == NULL) {
+// just don't return the name
+} else {
+const char* fieldName = fdesc_ptr->name()->as_C_string();
+*name_ptr =  (char*) jvmtiMalloc(strlen(fieldName) + 1);
+if (*name_ptr == NULL)
+return JVMTI_ERROR_OUT_OF_MEMORY;
+strcpy(*name_ptr, fieldName);
+}
+if (signature_ptr== NULL) {
+// just don't return the signature
+} else {
+const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
+*signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
+if (*signature_ptr == NULL)
+return JVMTI_ERROR_OUT_OF_MEMORY;
+strcpy(*signature_ptr, fieldSignature);
+}
+if (generic_ptr != NULL) {
+*generic_ptr = NULL;
+symbolOop soop = fdesc_ptr->generic_signature();
+if (soop != NULL) {
+const char* gen_sig = soop->as_C_string();
+if (gen_sig != NULL) {
+jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
+if (err != JVMTI_ERROR_NONE) {
+return err;
+}
+strcpy(*generic_ptr, gen_sig);
+}
+}
+}
+return JVMTI_ERROR_NONE;
+} /* end GetFieldName */
+// declaring_class_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
+*declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
+return JVMTI_ERROR_NONE;
+} /* end GetFieldDeclaringClass */
+// modifiers_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
+AccessFlags resultFlags = fdesc_ptr->access_flags();
+jint result = resultFlags.as_int();
+*modifiers_ptr = result;
+return JVMTI_ERROR_NONE;
+} /* end GetFieldModifiers */
+// is_synthetic_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
+*is_synthetic_ptr = fdesc_ptr->is_synthetic();
+return JVMTI_ERROR_NONE;
+} /* end IsFieldSynthetic */
+//
+// Method functions
+//
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+// name_ptr - NULL is a valid value, must be checked
+// signature_ptr - NULL is a valid value, must be checked
+// generic_ptr - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::GetMethodName(methodOop method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+JavaThread* current_thread  = JavaThread::current();
+ResourceMark rm(current_thread); // get the utf8 name and signature
+if (name_ptr == NULL) {
+// just don't return the name
+} else {
+const char* utf8_name = (const char *) method_oop->name()->as_utf8();
+*name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
+strcpy(*name_ptr, utf8_name);
+}
+if (signature_ptr == NULL) {
+// just don't return the signature
+} else {
+const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
+*signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
+strcpy(*signature_ptr, utf8_signature);
+}
+if (generic_ptr != NULL) {
+*generic_ptr = NULL;
+symbolOop soop = method_oop->generic_signature();
+if (soop != NULL) {
+const char* gen_sig = soop->as_C_string();
+if (gen_sig != NULL) {
+jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
+if (err != JVMTI_ERROR_NONE) {
+return err;
+}
+strcpy(*generic_ptr, gen_sig);
+}
+}
+}
+return JVMTI_ERROR_NONE;
+} /* end GetMethodName */
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+// declaring_class_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetMethodDeclaringClass(methodOop method_oop, jclass* declaring_class_ptr) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+(*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
+return JVMTI_ERROR_NONE;
+} /* end GetMethodDeclaringClass */
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+// modifiers_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetMethodModifiers(methodOop method_oop, jint* modifiers_ptr) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+(*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
+return JVMTI_ERROR_NONE;
+} /* end GetMethodModifiers */
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+// max_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetMaxLocals(methodOop method_oop, jint* max_ptr) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+// get max stack
+(*max_ptr) = method_oop->max_locals();
+return JVMTI_ERROR_NONE;
+} /* end GetMaxLocals */
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+// size_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetArgumentsSize(methodOop method_oop, jint* size_ptr) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+// get size of arguments
+(*size_ptr) = method_oop->size_of_parameters();
+return JVMTI_ERROR_NONE;
+} /* end GetArgumentsSize */
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+// entry_count_ptr - pre-checked for NULL
+// table_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetLineNumberTable(methodOop method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+if (!method_oop->has_linenumber_table()) {
+return (JVMTI_ERROR_ABSENT_INFORMATION);
+}
+// The line number table is compressed so we don't know how big it is until decompressed.
+// Decompression is really fast so we just do it twice.
+// Compute size of table
+jint num_entries = 0;
+CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
+while (stream.read_pair()) {
+num_entries++;
+}
+jvmtiLineNumberEntry *jvmti_table =
+(jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
+// Fill jvmti table
+if (num_entries > 0) {
+int index = 0;
+CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
+while (stream.read_pair()) {
+jvmti_table[index].start_location = (jlocation) stream.bci();
+jvmti_table[index].line_number = (jint) stream.line();
+index++;
+}
+assert(index == num_entries, "sanity check");
+}
+// Set up results
+(*entry_count_ptr) = num_entries;
+(*table_ptr) = jvmti_table;
+return JVMTI_ERROR_NONE;
+} /* end GetLineNumberTable */
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+// start_location_ptr - pre-checked for NULL
+// end_location_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetMethodLocation(methodOop method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+// get start and end location
+(*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
+if (method_oop->code_size() == 0) {
+// there is no code so there is no start location
+(*start_location_ptr) = (jlocation)(-1);
+} else {
+(*start_location_ptr) = (jlocation)(0);
+}
+return JVMTI_ERROR_NONE;
+} /* end GetMethodLocation */
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+// entry_count_ptr - pre-checked for NULL
+// table_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetLocalVariableTable(methodOop method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+JavaThread* current_thread  = JavaThread::current();
+// does the klass have any local variable information?
+instanceKlass* ik = instanceKlass::cast(method_oop->method_holder());
+if (!ik->access_flags().has_localvariable_table()) {
+return (JVMTI_ERROR_ABSENT_INFORMATION);
+}
+constantPoolOop constants = method_oop->constants();
+NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
+// in the vm localvariable table representation, 6 consecutive elements in the table
+// represent a 6-tuple of shorts
+// [start_pc, length, name_index, descriptor_index, signature_index, index]
+jint num_entries = method_oop->localvariable_table_length();
+jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
+jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
+if (num_entries > 0) {
+LocalVariableTableElement* table = method_oop->localvariable_table_start();
+for (int i = 0; i < num_entries; i++) {
+// get the 5 tuple information from the vm table
+jlocation start_location = (jlocation) table[i].start_bci;
+jint length = (jint) table[i].length;
+int name_index = (int) table[i].name_cp_index;
+int signature_index = (int) table[i].descriptor_cp_index;
+int generic_signature_index = (int) table[i].signature_cp_index;
+jint slot = (jint) table[i].slot;
+// get utf8 name and signature
+char *name_buf = NULL;
+char *sig_buf = NULL;
+char *gen_sig_buf = NULL;
+{
+ResourceMark rm(current_thread);
+const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
+name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
+strcpy(name_buf, utf8_name);
+const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
+sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
+strcpy(sig_buf, utf8_signature);
+if (generic_signature_index > 0) {
+const char *utf8_gen_sign = (const char *)
+constants->symbol_at(generic_signature_index)->as_utf8();
+gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
+strcpy(gen_sig_buf, utf8_gen_sign);
+}
+}
+// fill in the jvmti local variable table
+jvmti_table[i].start_location = start_location;
+jvmti_table[i].length = length;
+jvmti_table[i].name = name_buf;
+jvmti_table[i].signature = sig_buf;
+jvmti_table[i].generic_signature = gen_sig_buf;
+jvmti_table[i].slot = slot;
+}
+}
+// set results
+(*entry_count_ptr) = num_entries;
+(*table_ptr) = jvmti_table;
+return JVMTI_ERROR_NONE;
+} /* end GetLocalVariableTable */
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+// bytecode_count_ptr - pre-checked for NULL
+// bytecodes_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetBytecodes(methodOop method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+HandleMark hm;
+methodHandle method(method_oop);
+jint size = (jint)method->code_size();
+jvmtiError err = allocate(size, bytecodes_ptr);
+if (err != JVMTI_ERROR_NONE) {
+return err;
+}
+(*bytecode_count_ptr) = size;
+// get byte codes
+JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
+return JVMTI_ERROR_NONE;
+} /* end GetBytecodes */
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+// is_native_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::IsMethodNative(methodOop method_oop, jboolean* is_native_ptr) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+(*is_native_ptr) = method_oop->is_native();
+return JVMTI_ERROR_NONE;
+} /* end IsMethodNative */
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+// is_synthetic_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::IsMethodSynthetic(methodOop method_oop, jboolean* is_synthetic_ptr) {
+NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
+(*is_synthetic_ptr) = method_oop->is_synthetic();
+return JVMTI_ERROR_NONE;
+} /* end IsMethodSynthetic */
+// method_oop - pre-checked for validity, but may be NULL meaning obsolete method
+// is_obsolete_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::IsMethodObsolete(methodOop method_oop, jboolean* is_obsolete_ptr) {
+if (method_oop == NULL || method_oop->is_obsolete()) {
+*is_obsolete_ptr = true;
+} else {
+*is_obsolete_ptr = false;
+}
+return JVMTI_ERROR_NONE;
+} /* end IsMethodObsolete */
+//
+// Raw Monitor functions
+//
+// name - pre-checked for NULL
+// monitor_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
+JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
+NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
+*monitor_ptr = (jrawMonitorID)rmonitor;
+return JVMTI_ERROR_NONE;
+} /* end CreateRawMonitor */
+// rmonitor - pre-checked for validity
+jvmtiError
+JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
+if (Threads::number_of_threads() == 0) {
+// Remove this  monitor from pending raw monitors list
+// if it has entered in onload or start phase.
+JvmtiPendingMonitors::destroy(rmonitor);
+} else {
+Thread* thread  = Thread::current();
+if (rmonitor->is_entered(thread)) {
+// The caller owns this monitor which we are about to destroy.
+// We exit the underlying synchronization object so that the
+// "delete monitor" call below can work without an assertion
+// failure on systems that don't like destroying synchronization
+// objects that are locked.
+int r;
+intptr_t recursion = rmonitor->recursions();
+for (intptr_t i=0; i <= recursion; i++) {
+r = rmonitor->raw_exit(thread);
+assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
+if (r != ObjectMonitor::OM_OK) {  // robustness
+return JVMTI_ERROR_INTERNAL;
+}
+}
+}
+if (rmonitor->owner() != NULL) {
+// The caller is trying to destroy a monitor that is locked by
+// someone else. While this is not forbidden by the JVMTI
+// spec, it will cause an assertion failure on systems that don't
+// like destroying synchronization objects that are locked.
+// We indicate a problem with the error return (and leak the
+// monitor's memory).
+return JVMTI_ERROR_NOT_MONITOR_OWNER;
+}
+}
+delete rmonitor;
+return JVMTI_ERROR_NONE;
+} /* end DestroyRawMonitor */
+// rmonitor - pre-checked for validity
+jvmtiError
+JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
+if (Threads::number_of_threads() == 0) {
+// No JavaThreads exist so ObjectMonitor enter cannot be
+// used, add this raw monitor to the pending list.
+// The pending monitors will be actually entered when
+// the VM is setup.
+// See transition_pending_raw_monitors in create_vm()
+// in thread.cpp.
+JvmtiPendingMonitors::enter(rmonitor);
+} else {
+int r;
+Thread* thread = Thread::current();
+if (thread->is_Java_thread()) {
+JavaThread* current_thread = (JavaThread*)thread;
+#ifdef PROPER_TRANSITIONS
+// Not really unknown but ThreadInVMfromNative does more than we want
+ThreadInVMfromUnknown __tiv;
+{
+ThreadBlockInVM __tbivm(current_thread);
+r = rmonitor->raw_enter(current_thread);
+}
+#else
+/* Transition to thread_blocked without entering vm state          */
+/* This is really evil. Normally you can't undo _thread_blocked    */
+/* transitions like this because it would cause us to miss a       */
+/* safepoint but since the thread was already in _thread_in_native */
+/* the thread is not leaving a safepoint safe state and it will    */
+/* block when it tries to return from native. We can't safepoint   */
+/* block in here because we could deadlock the vmthread. Blech.    */
+JavaThreadState state = current_thread->thread_state();
+assert(state == _thread_in_native, "Must be _thread_in_native");
+// frame should already be walkable since we are in native
+assert(!current_thread->has_last_Java_frame() ||
+current_thread->frame_anchor()->walkable(), "Must be walkable");
+current_thread->set_thread_state(_thread_blocked);
+r = rmonitor->raw_enter(current_thread);
+// restore state, still at a safepoint safe state
+current_thread->set_thread_state(state);
+#endif /* PROPER_TRANSITIONS */
+assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
+} else {
+if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
+r = rmonitor->raw_enter(thread);
+} else {
+ShouldNotReachHere();
+}
+}
+if (r != ObjectMonitor::OM_OK) {  // robustness
+return JVMTI_ERROR_INTERNAL;
+}
+}
+return JVMTI_ERROR_NONE;
+} /* end RawMonitorEnter */
+// rmonitor - pre-checked for validity
+jvmtiError
+JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
+jvmtiError err = JVMTI_ERROR_NONE;
+if (Threads::number_of_threads() == 0) {
+// No JavaThreads exist so just remove this monitor from the pending list.
+// Bool value from exit is false if rmonitor is not in the list.
+if (!JvmtiPendingMonitors::exit(rmonitor)) {
+err = JVMTI_ERROR_NOT_MONITOR_OWNER;
+}
+} else {
+int r;
+Thread* thread = Thread::current();
+if (thread->is_Java_thread()) {
+JavaThread* current_thread = (JavaThread*)thread;
+#ifdef PROPER_TRANSITIONS
+// Not really unknown but ThreadInVMfromNative does more than we want
+ThreadInVMfromUnknown __tiv;
+#endif /* PROPER_TRANSITIONS */
+r = rmonitor->raw_exit(current_thread);
+} else {
+if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
+r = rmonitor->raw_exit(thread);
+} else {
+ShouldNotReachHere();
+}
+}
+if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
+err = JVMTI_ERROR_NOT_MONITOR_OWNER;
+} else {
+assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
+if (r != ObjectMonitor::OM_OK) {  // robustness
+err = JVMTI_ERROR_INTERNAL;
+}
+}
+}
+return err;
+} /* end RawMonitorExit */
+// rmonitor - pre-checked for validity
+jvmtiError
+JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
+int r;
+Thread* thread = Thread::current();
+if (thread->is_Java_thread()) {
+JavaThread* current_thread = (JavaThread*)thread;
+#ifdef PROPER_TRANSITIONS
+// Not really unknown but ThreadInVMfromNative does more than we want
+ThreadInVMfromUnknown __tiv;
+{
+ThreadBlockInVM __tbivm(current_thread);
+r = rmonitor->raw_wait(millis, true, current_thread);
+}
+#else
+/* Transition to thread_blocked without entering vm state          */
+/* This is really evil. Normally you can't undo _thread_blocked    */
+/* transitions like this because it would cause us to miss a       */
+/* safepoint but since the thread was already in _thread_in_native */
+/* the thread is not leaving a safepoint safe state and it will    */
+/* block when it tries to return from native. We can't safepoint   */
+/* block in here because we could deadlock the vmthread. Blech.    */
+JavaThreadState state = current_thread->thread_state();
+assert(state == _thread_in_native, "Must be _thread_in_native");
+// frame should already be walkable since we are in native
+assert(!current_thread->has_last_Java_frame() ||
+current_thread->frame_anchor()->walkable(), "Must be walkable");
+current_thread->set_thread_state(_thread_blocked);
+r = rmonitor->raw_wait(millis, true, current_thread);
+// restore state, still at a safepoint safe state
+current_thread->set_thread_state(state);
+#endif /* PROPER_TRANSITIONS */
+} else {
+if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
+r = rmonitor->raw_wait(millis, true, thread);
+} else {
+ShouldNotReachHere();
+}
+}
+switch (r) {
+case ObjectMonitor::OM_INTERRUPTED:
+return JVMTI_ERROR_INTERRUPT;
+case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
+return JVMTI_ERROR_NOT_MONITOR_OWNER;
+}
+assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
+if (r != ObjectMonitor::OM_OK) {  // robustness
+return JVMTI_ERROR_INTERNAL;
+}
+return JVMTI_ERROR_NONE;
+} /* end RawMonitorWait */
+// rmonitor - pre-checked for validity
+jvmtiError
+JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
+int r;
+Thread* thread = Thread::current();
+if (thread->is_Java_thread()) {
+JavaThread* current_thread = (JavaThread*)thread;
+// Not really unknown but ThreadInVMfromNative does more than we want
+ThreadInVMfromUnknown __tiv;
+r = rmonitor->raw_notify(current_thread);
+} else {
+if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
+r = rmonitor->raw_notify(thread);
+} else {
+ShouldNotReachHere();
+}
+}
+if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
+return JVMTI_ERROR_NOT_MONITOR_OWNER;
+}
+assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
+if (r != ObjectMonitor::OM_OK) {  // robustness
+return JVMTI_ERROR_INTERNAL;
+}
+return JVMTI_ERROR_NONE;
+} /* end RawMonitorNotify */
+// rmonitor - pre-checked for validity
+jvmtiError
+JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
+int r;
+Thread* thread = Thread::current();
+if (thread->is_Java_thread()) {
+JavaThread* current_thread = (JavaThread*)thread;
+ThreadInVMfromUnknown __tiv;
+r = rmonitor->raw_notifyAll(current_thread);
+} else {
+if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
+r = rmonitor->raw_notifyAll(thread);
+} else {
+ShouldNotReachHere();
+}
+}
+if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
+return JVMTI_ERROR_NOT_MONITOR_OWNER;
+}
+assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
+if (r != ObjectMonitor::OM_OK) {  // robustness
+return JVMTI_ERROR_INTERNAL;
+}
+return JVMTI_ERROR_NONE;
+} /* end RawMonitorNotifyAll */
+//
+// JNI Function Interception functions
+//
+// function_table - pre-checked for NULL
+jvmtiError
+JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
+// Copy jni function table at safepoint.
+VM_JNIFunctionTableCopier copier(function_table);
+VMThread::execute(&copier);
+return JVMTI_ERROR_NONE;
+} /* end SetJNIFunctionTable */
+// function_table - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
+*function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
+if (*function_table == NULL)
+return JVMTI_ERROR_OUT_OF_MEMORY;
+memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
+return JVMTI_ERROR_NONE;
+} /* end GetJNIFunctionTable */
+//
+// Event Management functions
+//
+jvmtiError
+JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
+// can only generate two event types
+if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
+event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
+return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+}
+// for compiled_method_load events we must check that the environment
+// has the can_generate_compiled_method_load_events capability.
+if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
+if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
+return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
+}
+return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
+} else {
+return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
+}
+} /* end GenerateEvents */
+//
+// Extension Mechanism functions
+//
+// extension_count_ptr - pre-checked for NULL
+// extensions - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
+return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
+} /* end GetExtensionFunctions */
+// extension_count_ptr - pre-checked for NULL
+// extensions - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
+return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
+} /* end GetExtensionEvents */
+// callback - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
+return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
+} /* end SetExtensionEventCallback */
+//
+// Timers functions
+//
+// info_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
+os::current_thread_cpu_time_info(info_ptr);
+return JVMTI_ERROR_NONE;
+} /* end GetCurrentThreadCpuTimerInfo */
+// nanos_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
+*nanos_ptr = os::current_thread_cpu_time();
+return JVMTI_ERROR_NONE;
+} /* end GetCurrentThreadCpuTime */
+// info_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
+os::thread_cpu_time_info(info_ptr);
+return JVMTI_ERROR_NONE;
+} /* end GetThreadCpuTimerInfo */
+// Threads_lock NOT held, java_thread not protected by lock
+// java_thread - pre-checked
+// nanos_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
+*nanos_ptr = os::thread_cpu_time(java_thread);
+return JVMTI_ERROR_NONE;
+} /* end GetThreadCpuTime */
+// info_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
+os::javaTimeNanos_info(info_ptr);
+return JVMTI_ERROR_NONE;
+} /* end GetTimerInfo */
+// nanos_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetTime(jlong* nanos_ptr) {
+*nanos_ptr = os::javaTimeNanos();
+return JVMTI_ERROR_NONE;
+} /* end GetTime */
+// processor_count_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
+*processor_count_ptr = os::active_processor_count();
+return JVMTI_ERROR_NONE;
+} /* end GetAvailableProcessors */
+//
+// System Properties functions
+//
+// count_ptr - pre-checked for NULL
+// property_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
+jvmtiError err = JVMTI_ERROR_NONE;
+*count_ptr = Arguments::PropertyList_count(Arguments::system_properties());
+err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
+if (err != JVMTI_ERROR_NONE) {
+return err;
+}
+int i = 0 ;
+for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) {
+const char *key = p->key();
+char **tmp_value = *property_ptr+i;
+err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
+if (err == JVMTI_ERROR_NONE) {
+strcpy(*tmp_value, key);
+} else {
+// clean up previously allocated memory.
+for (int j=0; j<i; j++) {
+Deallocate((unsigned char*)*property_ptr+j);
+}
+Deallocate((unsigned char*)property_ptr);
+break;
+}
+}
+return err;
+} /* end GetSystemProperties */
+// property - pre-checked for NULL
+// value_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
+jvmtiError err = JVMTI_ERROR_NONE;
+const char *value;
+value = Arguments::PropertyList_get_value(Arguments::system_properties(), property);
+if (value == NULL) {
+err =  JVMTI_ERROR_NOT_AVAILABLE;
+} else {
+err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
+if (err == JVMTI_ERROR_NONE) {
+strcpy(*value_ptr, value);
+}
+}
+return err;
+} /* end GetSystemProperty */
+// property - pre-checked for NULL
+// value - NULL is a valid value, must be checked
+jvmtiError
+JvmtiEnv::SetSystemProperty(const char* property, const char* value) {
+jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
+for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
+if (strcmp(property, p->key()) == 0) {
+if (p->set_value((char *)value)) {
+err =  JVMTI_ERROR_NONE;
+}
+}
+}
+return err;
+} /* end SetSystemProperty */
+#endif // !JVMTI_KERNEL

Mercurial > hg > truffle

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