--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/prims/jvmtiEnv.cpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,3653 @@
+/*
+ * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "classfile/classLoaderExt.hpp"
+#include "classfile/javaClasses.inline.hpp"
+#include "classfile/stringTable.hpp"
+#include "classfile/modules.hpp"
+#include "classfile/systemDictionary.hpp"
+#include "classfile/vmSymbols.hpp"
+#include "interpreter/bytecodeStream.hpp"
+#include "interpreter/interpreter.hpp"
+#include "jvmtifiles/jvmtiEnv.hpp"
+#include "logging/log.hpp"
+#include "logging/logConfiguration.hpp"
+#include "memory/resourceArea.hpp"
+#include "memory/universe.inline.hpp"
+#include "oops/instanceKlass.hpp"
+#include "oops/objArrayOop.inline.hpp"
+#include "oops/oop.inline.hpp"
+#include "prims/jniCheck.hpp"
+#include "prims/jvm_misc.hpp"
+#include "prims/jvmtiAgentThread.hpp"
+#include "prims/jvmtiClassFileReconstituter.hpp"
+#include "prims/jvmtiCodeBlobEvents.hpp"
+#include "prims/jvmtiExtensions.hpp"
+#include "prims/jvmtiGetLoadedClasses.hpp"
+#include "prims/jvmtiImpl.hpp"
+#include "prims/jvmtiManageCapabilities.hpp"
+#include "prims/jvmtiRawMonitor.hpp"
+#include "prims/jvmtiRedefineClasses.hpp"
+#include "prims/jvmtiTagMap.hpp"
+#include "prims/jvmtiThreadState.inline.hpp"
+#include "prims/jvmtiUtil.hpp"
+#include "runtime/arguments.hpp"
+#include "runtime/deoptimization.hpp"
+#include "runtime/interfaceSupport.hpp"
+#include "runtime/javaCalls.hpp"
+#include "runtime/jfieldIDWorkaround.hpp"
+#include "runtime/osThread.hpp"
+#include "runtime/reflectionUtils.hpp"
+#include "runtime/signature.hpp"
+#include "runtime/thread.inline.hpp"
+#include "runtime/timerTrace.hpp"
+#include "runtime/vframe.hpp"
+#include "runtime/vmThread.hpp"
+#include "services/threadService.hpp"
+#include "utilities/exceptions.hpp"
+#include "utilities/preserveException.hpp"
+
+
+#define FIXLATER 0 // REMOVE this when completed.
+
+ // FIXLATER: hook into JvmtiTrace
+#define TraceJVMTICalls false
+
+JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
+}
+
+JvmtiEnv::~JvmtiEnv() {
+}
+
+JvmtiEnv*
+JvmtiEnv::create_a_jvmti(jint version) {
+ return new JvmtiEnv(version);
+}
+
+// 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);
+ if (state == NULL) {
+ return JVMTI_ERROR_THREAD_NOT_ALIVE;
+ }
+ }
+ 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);
+ VM_ENTRY_BASE(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 */
+
+ //
+ // Module functions
+ //
+
+// module_count_ptr - pre-checked for NULL
+// modules_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) {
+ JvmtiModuleClosure jmc;
+
+ return jmc.get_all_modules(this, module_count_ptr, modules_ptr);
+} /* end GetAllModules */
+
+
+// class_loader - NULL is a valid value, must be pre-checked
+// package_name - pre-checked for NULL
+// module_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) {
+ JavaThread* THREAD = JavaThread::current(); // pass to macros
+ ResourceMark rm(THREAD);
+
+ Handle h_loader (THREAD, JNIHandles::resolve(class_loader));
+ // Check that loader is a subclass of java.lang.ClassLoader.
+ if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) {
+ return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+ }
+ jobject module = Modules::get_named_module(h_loader, package_name, THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION;
+ return JVMTI_ERROR_INTERNAL; // unexpected exception
+ }
+ *module_ptr = module;
+ return JVMTI_ERROR_NONE;
+} /* end GetNamedModule */
+
+
+// module - pre-checked for NULL
+// to_module - pre-checked for NULL
+jvmtiError
+JvmtiEnv::AddModuleReads(jobject module, jobject to_module) {
+ JavaThread* THREAD = JavaThread::current();
+
+ // check module
+ Handle h_module(THREAD, JNIHandles::resolve(module));
+ if (!java_lang_Module::is_instance(h_module())) {
+ return JVMTI_ERROR_INVALID_MODULE;
+ }
+ // check to_module
+ Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
+ if (!java_lang_Module::is_instance(h_to_module())) {
+ return JVMTI_ERROR_INVALID_MODULE;
+ }
+ return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD);
+} /* end AddModuleReads */
+
+
+// module - pre-checked for NULL
+// pkg_name - pre-checked for NULL
+// to_module - pre-checked for NULL
+jvmtiError
+JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) {
+ JavaThread* THREAD = JavaThread::current();
+ Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
+
+ // check module
+ Handle h_module(THREAD, JNIHandles::resolve(module));
+ if (!java_lang_Module::is_instance(h_module())) {
+ return JVMTI_ERROR_INVALID_MODULE;
+ }
+ // check to_module
+ Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
+ if (!java_lang_Module::is_instance(h_to_module())) {
+ return JVMTI_ERROR_INVALID_MODULE;
+ }
+ return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD);
+} /* end AddModuleExports */
+
+
+// module - pre-checked for NULL
+// pkg_name - pre-checked for NULL
+// to_module - pre-checked for NULL
+jvmtiError
+JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) {
+ JavaThread* THREAD = JavaThread::current();
+ Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
+
+ // check module
+ Handle h_module(THREAD, JNIHandles::resolve(module));
+ if (!java_lang_Module::is_instance(h_module())) {
+ return JVMTI_ERROR_INVALID_MODULE;
+ }
+ // check to_module
+ Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
+ if (!java_lang_Module::is_instance(h_to_module())) {
+ return JVMTI_ERROR_INVALID_MODULE;
+ }
+ return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD);
+} /* end AddModuleOpens */
+
+
+// module - pre-checked for NULL
+// service - pre-checked for NULL
+jvmtiError
+JvmtiEnv::AddModuleUses(jobject module, jclass service) {
+ JavaThread* THREAD = JavaThread::current();
+
+ // check module
+ Handle h_module(THREAD, JNIHandles::resolve(module));
+ if (!java_lang_Module::is_instance(h_module())) {
+ return JVMTI_ERROR_INVALID_MODULE;
+ }
+ // check service
+ Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
+ if (!java_lang_Class::is_instance(h_service()) ||
+ java_lang_Class::is_primitive(h_service())) {
+ return JVMTI_ERROR_INVALID_CLASS;
+ }
+ return JvmtiExport::add_module_uses(h_module, h_service, THREAD);
+} /* end AddModuleUses */
+
+
+// module - pre-checked for NULL
+// service - pre-checked for NULL
+// impl_class - pre-checked for NULL
+jvmtiError
+JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) {
+ JavaThread* THREAD = JavaThread::current();
+
+ // check module
+ Handle h_module(THREAD, JNIHandles::resolve(module));
+ if (!java_lang_Module::is_instance(h_module())) {
+ return JVMTI_ERROR_INVALID_MODULE;
+ }
+ // check service
+ Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
+ if (!java_lang_Class::is_instance(h_service()) ||
+ java_lang_Class::is_primitive(h_service())) {
+ return JVMTI_ERROR_INVALID_CLASS;
+ }
+ // check impl_class
+ Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class));
+ if (!java_lang_Class::is_instance(h_impl_class()) ||
+ java_lang_Class::is_primitive(h_impl_class())) {
+ return JVMTI_ERROR_INVALID_CLASS;
+ }
+ return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD);
+} /* end AddModuleProvides */
+
+// module - pre-checked for NULL
+// is_modifiable_class_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) {
+ JavaThread* THREAD = JavaThread::current();
+
+ // check module
+ Handle h_module(THREAD, JNIHandles::resolve(module));
+ if (!java_lang_Module::is_instance(h_module())) {
+ return JVMTI_ERROR_INVALID_MODULE;
+ }
+
+ *is_modifiable_module_ptr = JNI_TRUE;
+ return JVMTI_ERROR_NONE;
+} /* end IsModifiableModule */
+
+
+ //
+ // 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 (!VM_RedefineClasses::is_modifiable_class(k_mirror)) {
+ return JVMTI_ERROR_UNMODIFIABLE_CLASS;
+ }
+
+ Klass* klass = java_lang_Class::as_Klass(k_mirror);
+
+ jint status = klass->jvmti_class_status();
+ if (status & (JVMTI_CLASS_STATUS_ERROR)) {
+ return JVMTI_ERROR_INVALID_CLASS;
+ }
+
+ InstanceKlass* ik = InstanceKlass::cast(klass);
+ if (ik->get_cached_class_file_bytes() == NULL) {
+ // Not cached, we need to reconstitute the class file from the
+ // VM representation. We don't attach the reconstituted class
+ // bytes to the InstanceKlass here because they have not been
+ // validated and we're not at a safepoint.
+ JvmtiClassFileReconstituter reconstituter(ik);
+ 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 = ik->get_cached_class_file_len();
+ class_definitions[index].class_bytes = ik->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);
+ *size_ptr = (jlong)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 if (use_version_1_0_semantics()) {
+ // This JvmtiEnv requested version 1.0 semantics and this function
+ // is only allowed in the ONLOAD phase in version 1.0 so we need to
+ // return an error here.
+ return JVMTI_ERROR_WRONG_PHASE;
+ } else if (phase == JVMTI_PHASE_LIVE) {
+ // The phase is checked by the wrapper that called this function,
+ // but this thread could be racing with the thread that is
+ // terminating the VM so we check one more time.
+
+ // create the zip entry
+ ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true);
+ 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
+ log_info(class, load)("opened: %s", zip_entry->name());
+ ClassLoaderExt::append_boot_classpath(zip_entry);
+ return JVMTI_ERROR_NONE;
+ } else {
+ return JVMTI_ERROR_WRONG_PHASE;
+ }
+
+} /* 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 if (phase == JVMTI_PHASE_LIVE) {
+ // The phase is checked by the wrapper that called this function,
+ // but this thread could be racing with the thread that is
+ // terminating the VM so we check one more time.
+ HandleMark hm;
+
+ // 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, false);
+ 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_platform_dependent_str(segment, THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION;
+ return JVMTI_ERROR_INTERNAL;
+ }
+
+ // 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->klass(),
+ vmSymbols::appendToClassPathForInstrumentation_name(),
+ vmSymbols::appendToClassPathForInstrumentation_signature(),
+ path,
+ THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ Symbol* ex_name = PENDING_EXCEPTION->klass()->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;
+ } else {
+ return JVMTI_ERROR_WRONG_PHASE;
+ }
+} /* end AddToSystemClassLoaderSearch */
+
+ //
+ // General functions
+ //
+
+// phase_ptr - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
+ *phase_ptr = 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) {
+ LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
+ switch (flag) {
+ case JVMTI_VERBOSE_OTHER:
+ // ignore
+ break;
+ case JVMTI_VERBOSE_CLASS:
+ LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
+ LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
+ break;
+ case JVMTI_VERBOSE_GC:
+ if (value == 0) {
+ LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
+ } else {
+ LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
+ }
+ 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 */
+
+ //
+ // 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_ThreadsSuspendJVMTI tsj;
+ VMThread::execute(&tsj);
+ }
+ // 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);
+ Handle name;
+ ThreadPriority priority;
+ Handle thread_group;
+ Handle context_class_loader;
+ bool is_daemon;
+
+ { MutexLocker mu(Threads_lock);
+
+ name = Handle(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 = java_lang_String::as_utf8_string(name());
+ } else {
+ int utf8_length = 0;
+ n = UNICODE::as_utf8((jchar*) NULL, utf8_length);
+ }
+
+ 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, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
+
+ // It is only safe to perform the direct operation on the current
+ // thread. All other usage needs to use a vm-safepoint-op for safety.
+ if (java_thread == calling_thread) {
+ 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, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
+
+ // It is only safe to perform the direct operation on the current
+ // thread. All other usage needs to use a vm-safepoint-op for safety.
+ if (java_thread == calling_thread) {
+ 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;
+ JavaThread* calling_thread = JavaThread::current();
+
+ // It is only safe to perform the direct operation on the current
+ // thread. All other usage needs to use a vm-safepoint-op for safety.
+ if (java_thread == calling_thread) {
+ 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);
+
+ const char* name;
+ Handle parent_group;
+ bool is_daemon;
+ ThreadPriority max_priority;
+
+ { MutexLocker mu(Threads_lock);
+
+ name = 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) {
+ info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
+ NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
+ strcpy(info_ptr->name, name);
+ } 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;
+
+ // It is only safe to perform the direct operation on the current
+ // thread. All other usage needs to use a vm-safepoint-op for safety.
+ if (java_thread == JavaThread::current()) {
+ 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);
+ if (state == NULL) {
+ return JVMTI_ERROR_THREAD_NOT_ALIVE;
+ }
+
+ // It is only safe to perform the direct operation on the current
+ // thread. All other usage needs to use a vm-safepoint-op for safety.
+ if (java_thread == JavaThread::current()) {
+ 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;
+
+ // retrieve or create the state
+ JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
+ if (state == NULL) {
+ return JVMTI_ERROR_THREAD_NOT_ALIVE;
+ }
+
+ // 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]) {
+ Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
+ }
+ }
+
+ // 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.
+
+ // It is only safe to perform the direct operation on the current
+ // thread. All other usage needs to use a vm-safepoint-op for safety.
+ if (java_thread == JavaThread::current()) {
+ state->update_for_pop_top_frame();
+ } else {
+ VM_UpdateForPopTopFrame op(state);
+ VMThread::execute(&op);
+ jvmtiError err = op.result();
+ if (err != JVMTI_ERROR_NONE) {
+ return err;
+ }
+ }
+
+ 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;
+
+ // It is only safe to perform the direct operation on the current
+ // thread. All other usage needs to use a vm-safepoint-op for safety.
+ if (java_thread == JavaThread::current()) {
+ 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) {
+ jvmtiError err = JVMTI_ERROR_NONE;
+ ResourceMark rm;
+ uint32_t debug_bits = 0;
+
+ JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
+ if (state == NULL) {
+ return JVMTI_ERROR_THREAD_NOT_ALIVE;
+ }
+
+ 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");
+
+ // It is only safe to perform the direct operation on the current
+ // thread. All other usage needs to use a vm-safepoint-op for safety.
+ if (java_thread == JavaThread::current()) {
+ int frame_number = state->count_frames() - depth;
+ state->env_thread_state(this)->set_frame_pop(frame_number);
+ } else {
+ VM_SetFramePop op(this, state, depth);
+ VMThread::execute(&op);
+ err = op.result();
+ }
+ return err;
+} /* 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
+ Klass* k = 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 = java_lang_Class::as_Klass(k_mirror);
+ if (klass == NULL) {
+ return JVMTI_ERROR_INVALID_CLASS;
+ }
+ }
+
+ if (initial_object != NULL) {
+ oop init_obj = JNIHandles::resolve_external_guard(initial_object);
+ if (init_obj == NULL) {
+ return JVMTI_ERROR_INVALID_OBJECT;
+ }
+ }
+
+ Thread *thread = Thread::current();
+ HandleMark hm(thread);
+
+ TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
+ JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, 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
+ Klass* k = 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 = java_lang_Class::as_Klass(k_mirror);
+ if (k == NULL) {
+ return JVMTI_ERROR_INVALID_CLASS;
+ }
+ }
+
+ TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
+ JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, 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", TRACETIME_LOG(Debug, jvmti, objecttagging));
+ 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", TRACETIME_LOG(Debug, jvmti, objecttagging));
+ 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", TRACETIME_LOG(Debug, jvmti, objecttagging));
+ Thread *thread = Thread::current();
+ HandleMark hm(thread);
+ JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, 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;
+ }
+ Klass* klass = java_lang_Class::as_Klass(k_mirror);
+ if (klass == NULL) {
+ return JVMTI_ERROR_INVALID_CLASS;
+ }
+ TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
+ 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 - pre-checked for NULL
+jvmtiError
+JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, 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_GetReceiver op(java_thread, current_thread, depth);
+ 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 GetLocalInstance */
+
+
+// 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(Method* 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(Method* 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);
+
+ 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);
+
+ 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);
+
+ 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);
+
+ 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);
+ Klass* k = NULL;
+ if (!isPrimitive) {
+ k = java_lang_Class::as_Klass(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 = 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 && k->is_instance_klass()) {
+ Symbol* 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 {
+ Klass* k = java_lang_Class::as_Klass(k_mirror);
+ NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+ result = 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;
+ }
+ Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
+ NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
+
+ if (!k_klass->is_instance_klass()) {
+ return JVMTI_ERROR_ABSENT_INFORMATION;
+ }
+
+ Symbol* 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)) {
+ Klass* k = java_lang_Class::as_Klass(k_mirror);
+ NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+ result = 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(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;
+ }
+ Klass* k = java_lang_Class::as_Klass(k_mirror);
+ NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+
+ // Return CLASS_NOT_PREPARED error as per JVMTI spec.
+ if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
+ return JVMTI_ERROR_CLASS_NOT_PREPARED;
+ }
+
+ if (!k->is_instance_klass()) {
+ *method_count_ptr = 0;
+ *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
+ return JVMTI_ERROR_NONE;
+ }
+ InstanceKlass* ik = InstanceKlass::cast(k);
+ // Allocate the result and fill it in
+ int result_length = ik->methods()->length();
+ jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
+ int index;
+ bool jmethodids_found = true;
+
+ 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++) {
+ Method* m = ik->methods()->at(index);
+ int original_index = ik->method_ordering()->at(index);
+ assert(original_index >= 0 && original_index < result_length, "invalid original method index");
+ jmethodID id;
+ if (jmethodids_found) {
+ id = m->find_jmethod_id_or_null();
+ if (id == NULL) {
+ // If we find an uninitialized value, make sure there is
+ // enough space for all the uninitialized values we might
+ // find.
+ ik->ensure_space_for_methodids(index);
+ jmethodids_found = false;
+ id = m->jmethod_id();
+ }
+ } else {
+ id = m->jmethod_id();
+ }
+ result_list[original_index] = id;
+ }
+ } else {
+ // otherwise just copy in any order
+ for (index = 0; index < result_length; index++) {
+ Method* m = ik->methods()->at(index);
+ jmethodID id;
+ if (jmethodids_found) {
+ id = m->find_jmethod_id_or_null();
+ if (id == NULL) {
+ // If we find an uninitialized value, make sure there is
+ // enough space for all the uninitialized values we might
+ // find.
+ ik->ensure_space_for_methodids(index);
+ jmethodids_found = false;
+ id = m->jmethod_id();
+ }
+ } else {
+ 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);
+ Klass* k = java_lang_Class::as_Klass(k_mirror);
+ NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+
+ // Return CLASS_NOT_PREPARED error as per JVMTI spec.
+ if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
+ return JVMTI_ERROR_CLASS_NOT_PREPARED;
+ }
+
+ if (!k->is_instance_klass()) {
+ *field_count_ptr = 0;
+ *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
+ return JVMTI_ERROR_NONE;
+ }
+
+
+ InstanceKlass* ik = InstanceKlass::cast(k);
+
+ int result_count = 0;
+ // First, count the fields.
+ FilteredFieldStream flds(ik, 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(ik, true, true); !src_st.eos(); src_st.next()) {
+ result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
+ ik, 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);
+ Klass* k = java_lang_Class::as_Klass(k_mirror);
+ NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+
+ // Return CLASS_NOT_PREPARED error as per JVMTI spec.
+ if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
+ return JVMTI_ERROR_CLASS_NOT_PREPARED;
+
+ if (!k->is_instance_klass()) {
+ *interface_count_ptr = 0;
+ *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
+ return JVMTI_ERROR_NONE;
+ }
+
+ Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
+ const int result_length = (interface_list == 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) {
+ Klass* klass_at = interface_list->at(i_index);
+ assert(klass_at->is_klass(), "interfaces must be Klass*s");
+ assert(klass_at->is_interface(), "interfaces must be interfaces");
+ oop mirror_at = klass_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;
+ }
+ Klass* klass = java_lang_Class::as_Klass(k_mirror);
+
+ 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;
+ }
+
+ InstanceKlass* ik = InstanceKlass::cast(klass);
+ *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;
+ }
+
+ Klass* klass = java_lang_Class::as_Klass(k_mirror);
+ Thread *thread = Thread::current();
+ ResourceMark rm(thread);
+
+ 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;
+ }
+
+ InstanceKlass* ik = InstanceKlass::cast(klass);
+ JvmtiConstantPoolReconstituter reconstituter(ik);
+ 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();
+ }
+
+ constantPoolHandle constants(thread, ik->constants());
+ *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)) {
+ Klass* k = java_lang_Class::as_Klass(k_mirror);
+ if (k != NULL && 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)) {
+ Klass* k = java_lang_Class::as_Klass(k_mirror);
+ if (k != NULL && k->is_array_klass()) {
+ 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);
+ Klass* k = java_lang_Class::as_Klass(k_mirror);
+ NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+
+ oop result_oop = 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;
+ }
+ Klass* k = java_lang_Class::as_Klass(k_mirror);
+ NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
+ if (!k->is_instance_klass()) {
+ return JVMTI_ERROR_ABSENT_INFORMATION;
+ }
+ const char* sde = InstanceKlass::cast(k)->source_debug_extension();
+ NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
+
+ {
+ *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
+ strcpy(*source_debug_extension_ptr, sde);
+ }
+ }
+
+ 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;
+ Symbol* 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(Method* 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;
+ Symbol* 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(Method* 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(Method* 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(Method* 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(Method* 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(Method* 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(Method* 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(Method* 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 = method_oop->method_holder();
+ if (!ik->access_flags().has_localvariable_table()) {
+ return (JVMTI_ERROR_ABSENT_INFORMATION);
+ }
+
+ ConstantPool* 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(Method* 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(Method* 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(Method* 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(Method* method_oop, jboolean* is_obsolete_ptr) {
+ if (use_version_1_0_semantics() &&
+ get_capabilities()->can_redefine_classes == 0) {
+ // This JvmtiEnv requested version 1.0 semantics and this function
+ // requires the can_redefine_classes capability in version 1.0 so
+ // we need to return an error here.
+ return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
+ }
+
+ 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 = 0;
+ 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 = 0;
+ 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 = 0;
+ 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 = 0;
+ 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 = 0;
+ 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;
+
+ // Get the number of readable properties.
+ *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
+
+ // Allocate memory to hold the exact number of readable properties.
+ err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
+ if (err != JVMTI_ERROR_NONE) {
+ return err;
+ }
+ int readable_count = 0;
+ // Loop through the system properties until all the readable properties are found.
+ for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
+ if (p->is_readable()) {
+ const char *key = p->key();
+ char **tmp_value = *property_ptr+readable_count;
+ readable_count++;
+ 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<readable_count; j++) {
+ Deallocate((unsigned char*)*property_ptr+j);
+ }
+ Deallocate((unsigned char*)property_ptr);
+ break;
+ }
+ }
+ }
+ assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
+ 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;
+
+ // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
+ value = Arguments::PropertyList_get_readable_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_ptr) {
+ 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_writeable_value(value_ptr)) {
+ err = JVMTI_ERROR_NONE;
+ }
+ }
+ }
+ return err;
+} /* end SetSystemProperty */