Java example source code file (jvmtiEnv.cpp)
The jvmtiEnv.cpp Java example source code/*
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
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*/
#include "precompiled.hpp"
#include "classfile/systemDictionary.hpp"
#include "classfile/vmSymbols.hpp"
#include "interpreter/bytecodeStream.hpp"
#include "interpreter/interpreter.hpp"
#include "jvmtifiles/jvmtiEnv.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.inline.hpp"
#include "oops/instanceKlass.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/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 */
//
// Class functions
//
// class_count_ptr - pre-checked for NULL
// classes_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
} /* end GetLoadedClasses */
// initiating_loader - NULL is a valid value, must be checked
// class_count_ptr - pre-checked for NULL
// classes_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
class_count_ptr, classes_ptr);
} /* end GetClassLoaderClasses */
// k_mirror - may be primitive, this must be checked
// is_modifiable_class_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
*is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
JNI_TRUE : JNI_FALSE;
return JVMTI_ERROR_NONE;
} /* end IsModifiableClass */
// class_count - pre-checked to be greater than or equal to 0
// classes - pre-checked for NULL
jvmtiError
JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
//TODO: add locking
int index;
JavaThread* current_thread = JavaThread::current();
ResourceMark rm(current_thread);
jvmtiClassDefinition* class_definitions =
NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
for (index = 0; index < class_count; index++) {
HandleMark hm(current_thread);
jclass jcls = classes[index];
oop k_mirror = JNIHandles::resolve_external_guard(jcls);
if (k_mirror == NULL) {
return JVMTI_ERROR_INVALID_CLASS;
}
if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
return JVMTI_ERROR_INVALID_CLASS;
}
if (java_lang_Class::is_primitive(k_mirror)) {
return JVMTI_ERROR_UNMODIFIABLE_CLASS;
}
Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
KlassHandle klass(current_thread, k_oop);
jint status = klass->jvmti_class_status();
if (status & (JVMTI_CLASS_STATUS_ERROR)) {
return JVMTI_ERROR_INVALID_CLASS;
}
if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
return JVMTI_ERROR_UNMODIFIABLE_CLASS;
}
instanceKlassHandle ikh(current_thread, k_oop);
if (ikh->get_cached_class_file_bytes() == NULL) {
// Not cached, we need to reconstitute the class file from 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.
constantPoolHandle constants(current_thread, ikh->constants());
MonitorLockerEx ml(constants->lock()); // lock constant pool while we query it
JvmtiClassFileReconstituter reconstituter(ikh);
if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
return reconstituter.get_error();
}
class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
class_definitions[index].class_bytes = (unsigned char*)
reconstituter.class_file_bytes();
} else {
// it is cached, get it from the cache
class_definitions[index].class_byte_count = ikh->get_cached_class_file_len();
class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes();
}
class_definitions[index].klass = jcls;
}
VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
VMThread::execute(&op);
return (op.check_error());
} /* end RetransformClasses */
// class_count - pre-checked to be greater than or equal to 0
// class_definitions - pre-checked for NULL
jvmtiError
JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
//TODO: add locking
VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
VMThread::execute(&op);
return (op.check_error());
} /* end RedefineClasses */
//
// Object functions
//
// size_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
oop mirror = JNIHandles::resolve_external_guard(object);
NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
if (mirror->klass() == SystemDictionary::Class_klass() &&
!java_lang_Class::is_primitive(mirror)) {
Klass* k = java_lang_Class::as_Klass(mirror);
assert(k != NULL, "class for non-primitive mirror must exist");
*size_ptr = k->size() * wordSize;
} else {
*size_ptr = mirror->size() * wordSize;
}
return JVMTI_ERROR_NONE;
} /* end GetObjectSize */
//
// Method functions
//
// prefix - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
return prefix == NULL?
SetNativeMethodPrefixes(0, NULL) :
SetNativeMethodPrefixes(1, (char**)&prefix);
} /* end SetNativeMethodPrefix */
// prefix_count - pre-checked to be greater than or equal to 0
// prefixes - pre-checked for NULL
jvmtiError
JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
// Have to grab JVMTI thread state lock to be sure that some thread
// isn't accessing the prefixes at the same time we are setting them.
// No locks during VM bring-up.
if (Threads::number_of_threads() == 0) {
return set_native_method_prefixes(prefix_count, prefixes);
} else {
MutexLocker mu(JvmtiThreadState_lock);
return set_native_method_prefixes(prefix_count, prefixes);
}
} /* end SetNativeMethodPrefixes */
//
// Event Management functions
//
// callbacks - NULL is a valid value, must be checked
// size_of_callbacks - pre-checked to be greater than or equal to 0
jvmtiError
JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
return JVMTI_ERROR_NONE;
} /* end SetEventCallbacks */
// event_thread - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
JavaThread* java_thread = NULL;
if (event_thread != NULL) {
oop thread_oop = JNIHandles::resolve_external_guard(event_thread);
if (thread_oop == NULL) {
return JVMTI_ERROR_INVALID_THREAD;
}
if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
return JVMTI_ERROR_INVALID_THREAD;
}
java_thread = java_lang_Thread::thread(thread_oop);
if (java_thread == NULL) {
return JVMTI_ERROR_THREAD_NOT_ALIVE;
}
}
// event_type must be valid
if (!JvmtiEventController::is_valid_event_type(event_type)) {
return JVMTI_ERROR_INVALID_EVENT_TYPE;
}
// global events cannot be controlled at thread level.
if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) {
return JVMTI_ERROR_ILLEGAL_ARGUMENT;
}
bool enabled = (mode == JVMTI_ENABLE);
// assure that needed capabilities are present
if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
}
if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
record_class_file_load_hook_enabled();
}
JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
return JVMTI_ERROR_NONE;
} /* end SetEventNotificationMode */
//
// Capability functions
//
// capabilities_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
get_prohibited_capabilities(),
capabilities_ptr);
return JVMTI_ERROR_NONE;
} /* end GetPotentialCapabilities */
// capabilities_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
get_prohibited_capabilities(),
capabilities_ptr,
get_capabilities());
} /* end AddCapabilities */
// capabilities_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
return JVMTI_ERROR_NONE;
} /* end RelinquishCapabilities */
// capabilities_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
return JVMTI_ERROR_NONE;
} /* end GetCapabilities */
//
// Class Loader Search functions
//
// segment - pre-checked for NULL
jvmtiError
JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
jvmtiPhase phase = get_phase();
if (phase == JVMTI_PHASE_ONLOAD) {
Arguments::append_sysclasspath(segment);
return JVMTI_ERROR_NONE;
} else 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);
if (zip_entry == NULL) {
return JVMTI_ERROR_ILLEGAL_ARGUMENT;
}
// lock the loader
Thread* thread = Thread::current();
HandleMark hm;
Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
ObjectLocker ol(loader_lock, thread);
// add the jar file to the bootclasspath
if (TraceClassLoading) {
tty->print_cr("[Opened %s]", zip_entry->name());
}
ClassLoader::add_to_list(zip_entry);
return JVMTI_ERROR_NONE;
} 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);
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;
}
instanceKlassHandle loader_ik(THREAD, loader->klass());
// Invoke the appendToClassPathForInstrumentation method - if the method
// is not found it means the loader doesn't support adding to the class path
// in the live phase.
{
JavaValue res(T_VOID);
JavaCalls::call_special(&res,
loader,
loader_ik,
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 = get_phase();
return JVMTI_ERROR_NONE;
} /* end GetPhase */
jvmtiError
JvmtiEnv::DisposeEnvironment() {
dispose();
return JVMTI_ERROR_NONE;
} /* end DisposeEnvironment */
// data - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
set_env_local_storage(data);
return JVMTI_ERROR_NONE;
} /* end SetEnvironmentLocalStorage */
// data_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
*data_ptr = (void*)get_env_local_storage();
return JVMTI_ERROR_NONE;
} /* end GetEnvironmentLocalStorage */
// version_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetVersionNumber(jint* version_ptr) {
*version_ptr = JVMTI_VERSION;
return JVMTI_ERROR_NONE;
} /* end GetVersionNumber */
// name_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
return JVMTI_ERROR_ILLEGAL_ARGUMENT;
}
const char *name = JvmtiUtil::error_name(error);
if (name == NULL) {
return JVMTI_ERROR_ILLEGAL_ARGUMENT;
}
size_t len = strlen(name) + 1;
jvmtiError err = allocate(len, (unsigned char**)name_ptr);
if (err == JVMTI_ERROR_NONE) {
memcpy(*name_ptr, name, len);
}
return err;
} /* end GetErrorName */
jvmtiError
JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
switch (flag) {
case JVMTI_VERBOSE_OTHER:
// ignore
break;
case JVMTI_VERBOSE_CLASS:
TraceClassLoading = value != 0;
TraceClassUnloading = value != 0;
break;
case JVMTI_VERBOSE_GC:
PrintGC = value != 0;
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_ForceSafepoint vfs;
VMThread::execute(&vfs);
}
// per-thread suspend results returned via results parameter
return JVMTI_ERROR_NONE;
} /* end SuspendThreadList */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
jvmtiError
JvmtiEnv::ResumeThread(JavaThread* java_thread) {
// don't allow hidden thread resume request.
if (java_thread->is_hidden_from_external_view()) {
return JVMTI_ERROR_NONE;
}
if (!java_thread->is_being_ext_suspended()) {
return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
}
if (!JvmtiSuspendControl::resume(java_thread)) {
return JVMTI_ERROR_INTERNAL;
}
return JVMTI_ERROR_NONE;
} /* end ResumeThread */
// request_count - pre-checked to be greater than or equal to 0
// request_list - pre-checked for NULL
// results - pre-checked for NULL
jvmtiError
JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
for (int i = 0; i < request_count; i++) {
JavaThread *java_thread = get_JavaThread(request_list[i]);
if (java_thread == NULL) {
results[i] = JVMTI_ERROR_INVALID_THREAD;
continue;
}
// don't allow hidden thread resume request.
if (java_thread->is_hidden_from_external_view()) {
results[i] = JVMTI_ERROR_NONE; // indicate successful resume
continue;
}
if (!java_thread->is_being_ext_suspended()) {
results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
continue;
}
if (!JvmtiSuspendControl::resume(java_thread)) {
results[i] = JVMTI_ERROR_INTERNAL;
continue;
}
results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
}
// per-thread resume results returned via results parameter
return JVMTI_ERROR_NONE;
} /* end ResumeThreadList */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
jvmtiError
JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
oop e = JNIHandles::resolve_external_guard(exception);
NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
JavaThread::send_async_exception(java_thread->threadObj(), e);
return JVMTI_ERROR_NONE;
} /* end StopThread */
// Threads_lock NOT held
// thread - NOT pre-checked
jvmtiError
JvmtiEnv::InterruptThread(jthread thread) {
oop thread_oop = JNIHandles::resolve_external_guard(thread);
if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
return JVMTI_ERROR_INVALID_THREAD;
JavaThread* current_thread = JavaThread::current();
// Todo: this is a duplicate of JVM_Interrupt; share code in future
// Ensure that the C++ Thread and OSThread structures aren't freed before we operate
MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock);
// We need to re-resolve the java_thread, since a GC might have happened during the
// acquire of the lock
JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread));
NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE);
Thread::interrupt(java_thread);
return JVMTI_ERROR_NONE;
} /* end InterruptThread */
// Threads_lock NOT held
// thread - NOT pre-checked
// info_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
ResourceMark rm;
HandleMark hm;
JavaThread* current_thread = JavaThread::current();
// if thread is NULL the current thread is used
oop thread_oop;
if (thread == NULL) {
thread_oop = current_thread->threadObj();
} else {
thread_oop = JNIHandles::resolve_external_guard(thread);
}
if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
return JVMTI_ERROR_INVALID_THREAD;
Handle thread_obj(current_thread, thread_oop);
typeArrayHandle name;
ThreadPriority priority;
Handle thread_group;
Handle context_class_loader;
bool is_daemon;
{ MutexLocker mu(Threads_lock);
name = typeArrayHandle(current_thread, java_lang_Thread::name(thread_obj()));
priority = java_lang_Thread::priority(thread_obj());
thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
is_daemon = java_lang_Thread::is_daemon(thread_obj());
oop loader = java_lang_Thread::context_class_loader(thread_obj());
context_class_loader = Handle(current_thread, loader);
}
{ const char *n;
if (name() != NULL) {
n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
} else {
n = UNICODE::as_utf8(NULL, 0);
}
info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
if (info_ptr->name == NULL)
return JVMTI_ERROR_OUT_OF_MEMORY;
strcpy(info_ptr->name, n);
}
info_ptr->is_daemon = is_daemon;
info_ptr->priority = priority;
info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
jni_reference(context_class_loader);
info_ptr->thread_group = jni_reference(thread_group);
return JVMTI_ERROR_NONE;
} /* end GetThreadInfo */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
// owned_monitor_count_ptr - pre-checked for NULL
// owned_monitors_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
jvmtiError err = JVMTI_ERROR_NONE;
JavaThread* calling_thread = JavaThread::current();
// growable array of jvmti monitors info on the C-heap
GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
uint32_t debug_bits = 0;
if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
} else {
// JVMTI get monitors info at safepoint. Do not require target thread to
// be suspended.
VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
VMThread::execute(&op);
err = op.result();
}
jint owned_monitor_count = owned_monitors_list->length();
if (err == JVMTI_ERROR_NONE) {
if ((err = allocate(owned_monitor_count * sizeof(jobject *),
(unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
// copy into the returned array
for (int i = 0; i < owned_monitor_count; i++) {
(*owned_monitors_ptr)[i] =
((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
}
*owned_monitor_count_ptr = owned_monitor_count;
}
}
// clean up.
for (int i = 0; i < owned_monitor_count; i++) {
deallocate((unsigned char*)owned_monitors_list->at(i));
}
delete owned_monitors_list;
return err;
} /* end GetOwnedMonitorInfo */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
// monitor_info_count_ptr - pre-checked for NULL
// monitor_info_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
jvmtiError err = JVMTI_ERROR_NONE;
JavaThread* calling_thread = JavaThread::current();
// growable array of jvmti monitors info on the C-heap
GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
uint32_t debug_bits = 0;
if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
} else {
// JVMTI get owned monitors info at safepoint. Do not require target thread to
// be suspended.
VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
VMThread::execute(&op);
err = op.result();
}
jint owned_monitor_count = owned_monitors_list->length();
if (err == JVMTI_ERROR_NONE) {
if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
(unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
// copy to output array.
for (int i = 0; i < owned_monitor_count; i++) {
(*monitor_info_ptr)[i].monitor =
((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
(*monitor_info_ptr)[i].stack_depth =
((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
}
}
*monitor_info_count_ptr = owned_monitor_count;
}
// clean up.
for (int i = 0; i < owned_monitor_count; i++) {
deallocate((unsigned char*)owned_monitors_list->at(i));
}
delete owned_monitors_list;
return err;
} /* end GetOwnedMonitorStackDepthInfo */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
// monitor_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
jvmtiError err = JVMTI_ERROR_NONE;
uint32_t debug_bits = 0;
JavaThread* calling_thread = JavaThread::current();
if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
} else {
// get contended monitor information at safepoint.
VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
VMThread::execute(&op);
err = op.result();
}
return err;
} /* end GetCurrentContendedMonitor */
// Threads_lock NOT held
// thread - NOT pre-checked
// proc - pre-checked for NULL
// arg - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
oop thread_oop = JNIHandles::resolve_external_guard(thread);
if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
return JVMTI_ERROR_INVALID_THREAD;
}
if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
return JVMTI_ERROR_INVALID_PRIORITY;
}
//Thread-self
JavaThread* current_thread = JavaThread::current();
Handle thread_hndl(current_thread, thread_oop);
{
MutexLocker mu(Threads_lock); // grab Threads_lock
JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
// At this point it may be possible that no osthread was created for the
// JavaThread due to lack of memory.
if (new_thread == NULL || new_thread->osthread() == NULL) {
if (new_thread) delete new_thread;
return JVMTI_ERROR_OUT_OF_MEMORY;
}
java_lang_Thread::set_thread(thread_hndl(), new_thread);
java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
java_lang_Thread::set_daemon(thread_hndl());
new_thread->set_threadObj(thread_hndl());
Threads::add(new_thread);
Thread::start(new_thread);
} // unlock Threads_lock
return JVMTI_ERROR_NONE;
} /* end RunAgentThread */
//
// Thread Group functions
//
// group_count_ptr - pre-checked for NULL
// groups_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
JavaThread* current_thread = JavaThread::current();
// Only one top level thread group now.
*group_count_ptr = 1;
// Allocate memory to store global-refs to the thread groups.
// Assume this area is freed by caller.
*groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
// Convert oop to Handle, then convert Handle to global-ref.
{
HandleMark hm(current_thread);
Handle system_thread_group(current_thread, Universe::system_thread_group());
*groups_ptr[0] = jni_reference(system_thread_group);
}
return JVMTI_ERROR_NONE;
} /* end GetTopThreadGroups */
// info_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
ResourceMark rm;
HandleMark hm;
JavaThread* current_thread = JavaThread::current();
Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
typeArrayHandle name;
Handle parent_group;
bool is_daemon;
ThreadPriority max_priority;
{ MutexLocker mu(Threads_lock);
name = typeArrayHandle(current_thread,
java_lang_ThreadGroup::name(group_obj()));
parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
}
info_ptr->is_daemon = is_daemon;
info_ptr->max_priority = max_priority;
info_ptr->parent = jni_reference(parent_group);
if (name() != NULL) {
const char* n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
info_ptr->name = (char *)jvmtiMalloc(strlen(n)+1);
NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
strcpy(info_ptr->name, n);
} else {
info_ptr->name = NULL;
}
return JVMTI_ERROR_NONE;
} /* end GetThreadGroupInfo */
// thread_count_ptr - pre-checked for NULL
// threads_ptr - pre-checked for NULL
// group_count_ptr - pre-checked for NULL
// groups_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
JavaThread* current_thread = JavaThread::current();
oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
Handle *thread_objs = NULL;
Handle *group_objs = NULL;
int nthreads = 0;
int ngroups = 0;
int hidden_threads = 0;
ResourceMark rm;
HandleMark hm;
Handle group_hdl(current_thread, group_obj);
{ MutexLocker mu(Threads_lock);
nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
if (nthreads > 0) {
objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
assert(nthreads <= threads->length(), "too many threads");
thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
for (int i=0, j=0; i<nthreads; i++) {
oop thread_obj = threads->obj_at(i);
assert(thread_obj != NULL, "thread_obj is NULL");
JavaThread *javathread = java_lang_Thread::thread(thread_obj);
// Filter out hidden java threads.
if (javathread != NULL && javathread->is_hidden_from_external_view()) {
hidden_threads++;
continue;
}
thread_objs[j++] = Handle(current_thread, thread_obj);
}
nthreads -= hidden_threads;
}
if (ngroups > 0) {
objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
assert(ngroups <= groups->length(), "too many threads");
group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
for (int i=0; i<ngroups; i++) {
oop group_obj = groups->obj_at(i);
assert(group_obj != NULL, "group_obj != NULL");
group_objs[i] = Handle(current_thread, group_obj);
}
}
}
// have to make global handles outside of Threads_lock
*group_count_ptr = ngroups;
*thread_count_ptr = nthreads;
*threads_ptr = new_jthreadArray(nthreads, thread_objs);
*groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
if ((nthreads > 0) && (*threads_ptr == NULL)) {
return JVMTI_ERROR_OUT_OF_MEMORY;
}
if ((ngroups > 0) && (*groups_ptr == NULL)) {
return JVMTI_ERROR_OUT_OF_MEMORY;
}
return JVMTI_ERROR_NONE;
} /* end GetThreadGroupChildren */
//
// Stack Frame functions
//
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
// max_frame_count - pre-checked to be greater than or equal to 0
// frame_buffer - pre-checked for NULL
// count_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
jvmtiError err = JVMTI_ERROR_NONE;
uint32_t debug_bits = 0;
if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
} else {
// JVMTI get stack trace at safepoint. Do not require target thread to
// be suspended.
VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
VMThread::execute(&op);
err = op.result();
}
return err;
} /* end GetStackTrace */
// max_frame_count - pre-checked to be greater than or equal to 0
// stack_info_ptr - pre-checked for NULL
// thread_count_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
jvmtiError err = JVMTI_ERROR_NONE;
JavaThread* calling_thread = JavaThread::current();
// JVMTI get stack traces at safepoint.
VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
VMThread::execute(&op);
*thread_count_ptr = op.final_thread_count();
*stack_info_ptr = op.stack_info();
err = op.result();
return err;
} /* end GetAllStackTraces */
// thread_count - pre-checked to be greater than or equal to 0
// thread_list - pre-checked for NULL
// max_frame_count - pre-checked to be greater than or equal to 0
// stack_info_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
jvmtiError err = JVMTI_ERROR_NONE;
// JVMTI get stack traces at safepoint.
VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
VMThread::execute(&op);
err = op.result();
if (err == JVMTI_ERROR_NONE) {
*stack_info_ptr = op.stack_info();
}
return err;
} /* end GetThreadListStackTraces */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
// count_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
jvmtiError err = JVMTI_ERROR_NONE;
// retrieve or create JvmtiThreadState.
JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
if (state == NULL) {
return JVMTI_ERROR_THREAD_NOT_ALIVE;
}
uint32_t debug_bits = 0;
if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
err = get_frame_count(state, count_ptr);
} else {
// get java stack frame count at safepoint.
VM_GetFrameCount op(this, state, count_ptr);
VMThread::execute(&op);
err = op.result();
}
return err;
} /* end GetFrameCount */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
jvmtiError
JvmtiEnv::PopFrame(JavaThread* java_thread) {
JavaThread* current_thread = JavaThread::current();
HandleMark hm(current_thread);
uint32_t debug_bits = 0;
// 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.
state->update_for_pop_top_frame();
java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
// Set pending step flag for this popframe and it is cleared when next
// step event is posted.
state->set_pending_step_for_popframe();
}
return JVMTI_ERROR_NONE;
} /* end PopFrame */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
// java_thread - unchecked
// depth - pre-checked as non-negative
// method_ptr - pre-checked for NULL
// location_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
jvmtiError err = JVMTI_ERROR_NONE;
uint32_t debug_bits = 0;
if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
} else {
// JVMTI get java stack frame location at safepoint.
VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
VMThread::execute(&op);
err = op.result();
}
return err;
} /* end GetFrameLocation */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
// java_thread - unchecked
// depth - pre-checked as non-negative
jvmtiError
JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
ResourceMark rm;
uint32_t debug_bits = 0;
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");
int frame_number = state->count_frames() - depth;
state->env_thread_state(this)->set_frame_pop(frame_number);
return JVMTI_ERROR_NONE;
} /* end NotifyFramePop */
//
// Force Early Return functions
//
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
jvmtiError
JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
jvalue val;
val.l = value;
return force_early_return(java_thread, val, atos);
} /* end ForceEarlyReturnObject */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
jvmtiError
JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
jvalue val;
val.i = value;
return force_early_return(java_thread, val, itos);
} /* end ForceEarlyReturnInt */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
jvmtiError
JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
jvalue val;
val.j = value;
return force_early_return(java_thread, val, ltos);
} /* end ForceEarlyReturnLong */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
jvmtiError
JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
jvalue val;
val.f = value;
return force_early_return(java_thread, val, ftos);
} /* end ForceEarlyReturnFloat */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
jvmtiError
JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
jvalue val;
val.d = value;
return force_early_return(java_thread, val, dtos);
} /* end ForceEarlyReturnDouble */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
jvmtiError
JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
jvalue val;
val.j = 0L;
return force_early_return(java_thread, val, vtos);
} /* end ForceEarlyReturnVoid */
//
// Heap functions
//
// klass - NULL is a valid value, must be checked
// initial_object - NULL is a valid value, must be checked
// callbacks - pre-checked for NULL
// user_data - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
// check klass if provided
Klass* k_oop = NULL;
if (klass != NULL) {
oop k_mirror = JNIHandles::resolve_external_guard(klass);
if (k_mirror == NULL) {
return JVMTI_ERROR_INVALID_CLASS;
}
if (java_lang_Class::is_primitive(k_mirror)) {
return JVMTI_ERROR_NONE;
}
k_oop = java_lang_Class::as_Klass(k_mirror);
if (k_oop == NULL) {
return JVMTI_ERROR_INVALID_CLASS;
}
}
Thread *thread = Thread::current();
HandleMark hm(thread);
KlassHandle kh (thread, k_oop);
TraceTime t("FollowReferences", TraceJVMTIObjectTagging);
JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
return JVMTI_ERROR_NONE;
} /* end FollowReferences */
// klass - NULL is a valid value, must be checked
// callbacks - pre-checked for NULL
// user_data - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
// check klass if provided
Klass* k_oop = NULL;
if (klass != NULL) {
oop k_mirror = JNIHandles::resolve_external_guard(klass);
if (k_mirror == NULL) {
return JVMTI_ERROR_INVALID_CLASS;
}
if (java_lang_Class::is_primitive(k_mirror)) {
return JVMTI_ERROR_NONE;
}
k_oop = java_lang_Class::as_Klass(k_mirror);
if (k_oop == NULL) {
return JVMTI_ERROR_INVALID_CLASS;
}
}
Thread *thread = Thread::current();
HandleMark hm(thread);
KlassHandle kh (thread, k_oop);
TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging);
JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
return JVMTI_ERROR_NONE;
} /* end IterateThroughHeap */
// tag_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
oop o = JNIHandles::resolve_external_guard(object);
NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
*tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
return JVMTI_ERROR_NONE;
} /* end GetTag */
jvmtiError
JvmtiEnv::SetTag(jobject object, jlong tag) {
oop o = JNIHandles::resolve_external_guard(object);
NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
return JVMTI_ERROR_NONE;
} /* end SetTag */
// tag_count - pre-checked to be greater than or equal to 0
// tags - pre-checked for NULL
// count_ptr - pre-checked for NULL
// object_result_ptr - NULL is a valid value, must be checked
// tag_result_ptr - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging);
return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
} /* end GetObjectsWithTags */
jvmtiError
JvmtiEnv::ForceGarbageCollection() {
Universe::heap()->collect(GCCause::_jvmti_force_gc);
return JVMTI_ERROR_NONE;
} /* end ForceGarbageCollection */
//
// Heap (1.0) functions
//
// object_reference_callback - pre-checked for NULL
// user_data - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
oop o = JNIHandles::resolve_external_guard(object);
NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
return JVMTI_ERROR_NONE;
} /* end IterateOverObjectsReachableFromObject */
// heap_root_callback - NULL is a valid value, must be checked
// stack_ref_callback - NULL is a valid value, must be checked
// object_ref_callback - NULL is a valid value, must be checked
// user_data - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging);
JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
return JVMTI_ERROR_NONE;
} /* end IterateOverReachableObjects */
// heap_object_callback - pre-checked for NULL
// user_data - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging);
Thread *thread = Thread::current();
HandleMark hm(thread);
JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
return JVMTI_ERROR_NONE;
} /* end IterateOverHeap */
// k_mirror - may be primitive, this must be checked
// heap_object_callback - pre-checked for NULL
// user_data - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
if (java_lang_Class::is_primitive(k_mirror)) {
// DO PRIMITIVE CLASS PROCESSING
return JVMTI_ERROR_NONE;
}
Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
if (k_oop == NULL) {
return JVMTI_ERROR_INVALID_CLASS;
}
Thread *thread = Thread::current();
HandleMark hm(thread);
KlassHandle klass (thread, k_oop);
TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging);
JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
return JVMTI_ERROR_NONE;
} /* end IterateOverInstancesOfClass */
//
// Local Variable functions
//
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
// java_thread - unchecked
// depth - pre-checked as non-negative
// value_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
JavaThread* current_thread = JavaThread::current();
// rm object is created to clean up the javaVFrame created in
// doit_prologue(), but after doit() is finished with it.
ResourceMark rm(current_thread);
VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
VMThread::execute(&op);
jvmtiError err = op.result();
if (err != JVMTI_ERROR_NONE) {
return err;
} else {
*value_ptr = op.value().l;
return JVMTI_ERROR_NONE;
}
} /* end GetLocalObject */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
// java_thread - unchecked
// depth - pre-checked as non-negative
// value - 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->oop_is_instance()) {
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->oop_is_instance()) {
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->oop_is_instance()) {
*method_count_ptr = 0;
*methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
return JVMTI_ERROR_NONE;
}
instanceKlassHandle instanceK_h(current_thread, k);
// Allocate the result and fill it in
int result_length = instanceK_h->methods()->length();
jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
int index;
if (JvmtiExport::can_maintain_original_method_order()) {
// Use the original method ordering indices stored in the class, so we can emit
// jmethodIDs in the order they appeared in the class file
for (index = 0; index < result_length; index++) {
Method* m = instanceK_h->methods()->at(index);
int original_index = instanceK_h->method_ordering()->at(index);
assert(original_index >= 0 && original_index < result_length, "invalid original method index");
jmethodID id = m->jmethod_id();
result_list[original_index] = id;
}
} else {
// otherwise just copy in any order
for (index = 0; index < result_length; index++) {
Method* m = instanceK_h->methods()->at(index);
jmethodID id = m->jmethod_id();
result_list[index] = id;
}
}
// Fill in return value.
*method_count_ptr = result_length;
*methods_ptr = result_list;
return JVMTI_ERROR_NONE;
} /* end GetClassMethods */
// k_mirror - may be primitive, this must be checked
// field_count_ptr - pre-checked for NULL
// fields_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
if (java_lang_Class::is_primitive(k_mirror)) {
*field_count_ptr = 0;
*fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
return JVMTI_ERROR_NONE;
}
JavaThread* current_thread = JavaThread::current();
HandleMark hm(current_thread);
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->oop_is_instance()) {
*field_count_ptr = 0;
*fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
return JVMTI_ERROR_NONE;
}
instanceKlassHandle instanceK_h(current_thread, k);
int result_count = 0;
// First, count the fields.
FilteredFieldStream flds(instanceK_h, true, true);
result_count = flds.field_count();
// Allocate the result and fill it in
jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
// The JVMTI spec requires fields in the order they occur in the class file,
// this is the reverse order of what FieldStream hands out.
int id_index = (result_count - 1);
for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
instanceK_h, src_st.offset(),
src_st.access_flags().is_static());
}
assert(id_index == -1, "just checking");
// Fill in the results
*field_count_ptr = result_count;
*fields_ptr = result_list;
return JVMTI_ERROR_NONE;
} /* end GetClassFields */
// k_mirror - may be primitive, this must be checked
// interface_count_ptr - pre-checked for NULL
// interfaces_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
{
if (java_lang_Class::is_primitive(k_mirror)) {
*interface_count_ptr = 0;
*interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
return JVMTI_ERROR_NONE;
}
JavaThread* current_thread = JavaThread::current();
HandleMark hm(current_thread);
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->oop_is_instance()) {
*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* k_oop = java_lang_Class::as_Klass(k_mirror);
Thread *thread = Thread::current();
HandleMark hm(thread);
KlassHandle klass(thread, k_oop);
jint status = klass->jvmti_class_status();
if (status & (JVMTI_CLASS_STATUS_ERROR)) {
return JVMTI_ERROR_INVALID_CLASS;
}
if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
return JVMTI_ERROR_ABSENT_INFORMATION;
}
instanceKlassHandle ik(thread, k_oop);
*minor_version_ptr = ik->minor_version();
*major_version_ptr = ik->major_version();
return JVMTI_ERROR_NONE;
} /* end GetClassVersionNumbers */
// k_mirror - may be primitive, this must be checked
// constant_pool_count_ptr - pre-checked for NULL
// constant_pool_byte_count_ptr - pre-checked for NULL
// constant_pool_bytes_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
if (java_lang_Class::is_primitive(k_mirror)) {
return JVMTI_ERROR_ABSENT_INFORMATION;
}
Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
Thread *thread = Thread::current();
HandleMark hm(thread);
ResourceMark rm(thread);
KlassHandle klass(thread, k_oop);
jint status = klass->jvmti_class_status();
if (status & (JVMTI_CLASS_STATUS_ERROR)) {
return JVMTI_ERROR_INVALID_CLASS;
}
if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
return JVMTI_ERROR_ABSENT_INFORMATION;
}
instanceKlassHandle ikh(thread, k_oop);
constantPoolHandle constants(thread, ikh->constants());
MonitorLockerEx ml(constants->lock()); // lock constant pool while we query it
JvmtiConstantPoolReconstituter reconstituter(ikh);
if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
return reconstituter.get_error();
}
unsigned char *cpool_bytes;
int cpool_size = reconstituter.cpool_size();
if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
return reconstituter.get_error();
}
jvmtiError res = allocate(cpool_size, &cpool_bytes);
if (res != JVMTI_ERROR_NONE) {
return res;
}
reconstituter.copy_cpool_bytes(cpool_bytes);
if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
return reconstituter.get_error();
}
*constant_pool_count_ptr = constants->length();
*constant_pool_byte_count_ptr = cpool_size;
*constant_pool_bytes_ptr = cpool_bytes;
return JVMTI_ERROR_NONE;
} /* end GetConstantPool */
// k_mirror - may be primitive, this must be checked
// is_interface_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
{
bool result = false;
if (!java_lang_Class::is_primitive(k_mirror)) {
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->oop_is_array()) {
result = true;
}
}
*is_array_class_ptr = result;
}
return JVMTI_ERROR_NONE;
} /* end IsArrayClass */
// k_mirror - may be primitive, this must be checked
// classloader_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
{
if (java_lang_Class::is_primitive(k_mirror)) {
*classloader_ptr = (jclass) jni_reference(Handle());
return JVMTI_ERROR_NONE;
}
JavaThread* current_thread = JavaThread::current();
HandleMark hm(current_thread);
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->oop_is_instance()) {
return JVMTI_ERROR_ABSENT_INFORMATION;
}
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;
Thread* thread = Thread::current();
if (thread->is_Java_thread()) {
JavaThread* current_thread = (JavaThread*)thread;
#ifdef PROPER_TRANSITIONS
// Not really unknown but ThreadInVMfromNative does more than we want
ThreadInVMfromUnknown __tiv;
{
ThreadBlockInVM __tbivm(current_thread);
r = rmonitor->raw_enter(current_thread);
}
#else
/* Transition to thread_blocked without entering vm state */
/* This is really evil. Normally you can't undo _thread_blocked */
/* transitions like this because it would cause us to miss a */
/* safepoint but since the thread was already in _thread_in_native */
/* the thread is not leaving a safepoint safe state and it will */
/* block when it tries to return from native. We can't safepoint */
/* block in here because we could deadlock the vmthread. Blech. */
JavaThreadState state = current_thread->thread_state();
assert(state == _thread_in_native, "Must be _thread_in_native");
// frame should already be walkable since we are in native
assert(!current_thread->has_last_Java_frame() ||
current_thread->frame_anchor()->walkable(), "Must be walkable");
current_thread->set_thread_state(_thread_blocked);
r = rmonitor->raw_enter(current_thread);
// restore state, still at a safepoint safe state
current_thread->set_thread_state(state);
#endif /* PROPER_TRANSITIONS */
assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
} else {
if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
r = rmonitor->raw_enter(thread);
} else {
ShouldNotReachHere();
}
}
if (r != ObjectMonitor::OM_OK) { // robustness
return JVMTI_ERROR_INTERNAL;
}
}
return JVMTI_ERROR_NONE;
} /* end RawMonitorEnter */
// rmonitor - pre-checked for validity
jvmtiError
JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
jvmtiError err = JVMTI_ERROR_NONE;
if (Threads::number_of_threads() == 0) {
// No JavaThreads exist so just remove this monitor from the pending list.
// Bool value from exit is false if rmonitor is not in the list.
if (!JvmtiPendingMonitors::exit(rmonitor)) {
err = JVMTI_ERROR_NOT_MONITOR_OWNER;
}
} else {
int r;
Thread* thread = Thread::current();
if (thread->is_Java_thread()) {
JavaThread* current_thread = (JavaThread*)thread;
#ifdef PROPER_TRANSITIONS
// Not really unknown but ThreadInVMfromNative does more than we want
ThreadInVMfromUnknown __tiv;
#endif /* PROPER_TRANSITIONS */
r = rmonitor->raw_exit(current_thread);
} else {
if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
r = rmonitor->raw_exit(thread);
} else {
ShouldNotReachHere();
}
}
if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
err = JVMTI_ERROR_NOT_MONITOR_OWNER;
} else {
assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
if (r != ObjectMonitor::OM_OK) { // robustness
err = JVMTI_ERROR_INTERNAL;
}
}
}
return err;
} /* end RawMonitorExit */
// rmonitor - pre-checked for validity
jvmtiError
JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
int r;
Thread* thread = Thread::current();
if (thread->is_Java_thread()) {
JavaThread* current_thread = (JavaThread*)thread;
#ifdef PROPER_TRANSITIONS
// Not really unknown but ThreadInVMfromNative does more than we want
ThreadInVMfromUnknown __tiv;
{
ThreadBlockInVM __tbivm(current_thread);
r = rmonitor->raw_wait(millis, true, current_thread);
}
#else
/* Transition to thread_blocked without entering vm state */
/* This is really evil. Normally you can't undo _thread_blocked */
/* transitions like this because it would cause us to miss a */
/* safepoint but since the thread was already in _thread_in_native */
/* the thread is not leaving a safepoint safe state and it will */
/* block when it tries to return from native. We can't safepoint */
/* block in here because we could deadlock the vmthread. Blech. */
JavaThreadState state = current_thread->thread_state();
assert(state == _thread_in_native, "Must be _thread_in_native");
// frame should already be walkable since we are in native
assert(!current_thread->has_last_Java_frame() ||
current_thread->frame_anchor()->walkable(), "Must be walkable");
current_thread->set_thread_state(_thread_blocked);
r = rmonitor->raw_wait(millis, true, current_thread);
// restore state, still at a safepoint safe state
current_thread->set_thread_state(state);
#endif /* PROPER_TRANSITIONS */
} else {
if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
r = rmonitor->raw_wait(millis, true, thread);
} else {
ShouldNotReachHere();
}
}
switch (r) {
case ObjectMonitor::OM_INTERRUPTED:
return JVMTI_ERROR_INTERRUPT;
case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
return JVMTI_ERROR_NOT_MONITOR_OWNER;
}
assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
if (r != ObjectMonitor::OM_OK) { // robustness
return JVMTI_ERROR_INTERNAL;
}
return JVMTI_ERROR_NONE;
} /* end RawMonitorWait */
// rmonitor - pre-checked for validity
jvmtiError
JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
int r;
Thread* thread = Thread::current();
if (thread->is_Java_thread()) {
JavaThread* current_thread = (JavaThread*)thread;
// Not really unknown but ThreadInVMfromNative does more than we want
ThreadInVMfromUnknown __tiv;
r = rmonitor->raw_notify(current_thread);
} else {
if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
r = rmonitor->raw_notify(thread);
} else {
ShouldNotReachHere();
}
}
if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
return JVMTI_ERROR_NOT_MONITOR_OWNER;
}
assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
if (r != ObjectMonitor::OM_OK) { // robustness
return JVMTI_ERROR_INTERNAL;
}
return JVMTI_ERROR_NONE;
} /* end RawMonitorNotify */
// rmonitor - pre-checked for validity
jvmtiError
JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
int r;
Thread* thread = Thread::current();
if (thread->is_Java_thread()) {
JavaThread* current_thread = (JavaThread*)thread;
ThreadInVMfromUnknown __tiv;
r = rmonitor->raw_notifyAll(current_thread);
} else {
if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
r = rmonitor->raw_notifyAll(thread);
} else {
ShouldNotReachHere();
}
}
if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
return JVMTI_ERROR_NOT_MONITOR_OWNER;
}
assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
if (r != ObjectMonitor::OM_OK) { // robustness
return JVMTI_ERROR_INTERNAL;
}
return JVMTI_ERROR_NONE;
} /* end RawMonitorNotifyAll */
//
// JNI Function Interception functions
//
// function_table - pre-checked for NULL
jvmtiError
JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
// Copy jni function table at safepoint.
VM_JNIFunctionTableCopier copier(function_table);
VMThread::execute(&copier);
return JVMTI_ERROR_NONE;
} /* end SetJNIFunctionTable */
// function_table - pre-checked for NULL
jvmtiError
JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
*function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
if (*function_table == NULL)
return JVMTI_ERROR_OUT_OF_MEMORY;
memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
return JVMTI_ERROR_NONE;
} /* end GetJNIFunctionTable */
//
// Event Management functions
//
jvmtiError
JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
// can only generate two event types
if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
return JVMTI_ERROR_ILLEGAL_ARGUMENT;
}
// for compiled_method_load events we must check that the environment
// has the can_generate_compiled_method_load_events capability.
if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
}
return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
} else {
return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
}
} /* end GenerateEvents */
//
// Extension Mechanism functions
//
// extension_count_ptr - pre-checked for NULL
// extensions - pre-checked for NULL
jvmtiError
JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
} /* end GetExtensionFunctions */
// extension_count_ptr - pre-checked for NULL
// extensions - pre-checked for NULL
jvmtiError
JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
} /* end GetExtensionEvents */
// callback - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
} /* end SetExtensionEventCallback */
//
// Timers functions
//
// info_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
os::current_thread_cpu_time_info(info_ptr);
return JVMTI_ERROR_NONE;
} /* end GetCurrentThreadCpuTimerInfo */
// nanos_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
*nanos_ptr = os::current_thread_cpu_time();
return JVMTI_ERROR_NONE;
} /* end GetCurrentThreadCpuTime */
// info_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
os::thread_cpu_time_info(info_ptr);
return JVMTI_ERROR_NONE;
} /* end GetThreadCpuTimerInfo */
// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
// nanos_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
*nanos_ptr = os::thread_cpu_time(java_thread);
return JVMTI_ERROR_NONE;
} /* end GetThreadCpuTime */
// info_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
os::javaTimeNanos_info(info_ptr);
return JVMTI_ERROR_NONE;
} /* end GetTimerInfo */
// nanos_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetTime(jlong* nanos_ptr) {
*nanos_ptr = os::javaTimeNanos();
return JVMTI_ERROR_NONE;
} /* end GetTime */
// processor_count_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
*processor_count_ptr = os::active_processor_count();
return JVMTI_ERROR_NONE;
} /* end GetAvailableProcessors */
//
// System Properties functions
//
// count_ptr - pre-checked for NULL
// property_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
jvmtiError err = JVMTI_ERROR_NONE;
*count_ptr = Arguments::PropertyList_count(Arguments::system_properties());
err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
if (err != JVMTI_ERROR_NONE) {
return err;
}
int i = 0 ;
for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) {
const char *key = p->key();
char **tmp_value = *property_ptr+i;
err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
if (err == JVMTI_ERROR_NONE) {
strcpy(*tmp_value, key);
} else {
// clean up previously allocated memory.
for (int j=0; j<i; j++) {
Deallocate((unsigned char*)*property_ptr+j);
}
Deallocate((unsigned char*)property_ptr);
break;
}
}
return err;
} /* end GetSystemProperties */
// property - pre-checked for NULL
// value_ptr - pre-checked for NULL
jvmtiError
JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
jvmtiError err = JVMTI_ERROR_NONE;
const char *value;
value = Arguments::PropertyList_get_value(Arguments::system_properties(), property);
if (value == NULL) {
err = JVMTI_ERROR_NOT_AVAILABLE;
} else {
err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
if (err == JVMTI_ERROR_NONE) {
strcpy(*value_ptr, value);
}
}
return err;
} /* end GetSystemProperty */
// property - pre-checked for NULL
// value - NULL is a valid value, must be checked
jvmtiError
JvmtiEnv::SetSystemProperty(const char* property, const char* value_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_value((char *)value_ptr)) {
err = JVMTI_ERROR_NONE;
}
}
}
return err;
} /* end SetSystemProperty */
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