/*
|
* Copyright (C) 2017 The Android Open Source Project
|
*
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
* you may not use this file except in compliance with the License.
|
* You may obtain a copy of the License at
|
*
|
* http://www.apache.org/licenses/LICENSE-2.0
|
*
|
* Unless required by applicable law or agreed to in writing, software
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
* See the License for the specific language governing permissions and
|
* limitations under the License.
|
*/
|
|
#include "jni.h"
|
#include "jvmti.h"
|
|
#include <vector>
|
|
#include "jvmti_helper.h"
|
#include "jni_helper.h"
|
#include "test_env.h"
|
#include "scoped_local_ref.h"
|
|
namespace art {
|
namespace common_monitors {
|
|
extern "C" JNIEXPORT jobject JNICALL Java_art_Monitors_getCurrentContendedMonitor(
|
JNIEnv* env, jclass, jthread thr) {
|
jobject out = nullptr;
|
JvmtiErrorToException(env, jvmti_env, jvmti_env->GetCurrentContendedMonitor(thr, &out));
|
return out;
|
}
|
|
extern "C" JNIEXPORT jobject JNICALL Java_art_Monitors_getObjectMonitorUsage(
|
JNIEnv* env, jclass, jobject obj) {
|
ScopedLocalRef<jclass> klass(env, env->FindClass("art/Monitors$MonitorUsage"));
|
if (env->ExceptionCheck()) {
|
return nullptr;
|
}
|
jmethodID constructor = env->GetMethodID(
|
klass.get(),
|
"<init>",
|
"(Ljava/lang/Object;Ljava/lang/Thread;I[Ljava/lang/Thread;[Ljava/lang/Thread;)V");
|
if (env->ExceptionCheck()) {
|
return nullptr;
|
}
|
jvmtiMonitorUsage usage;
|
if (JvmtiErrorToException(env, jvmti_env, jvmti_env->GetObjectMonitorUsage(obj, &usage))) {
|
return nullptr;
|
}
|
jobjectArray wait = CreateObjectArray(env, usage.waiter_count, "java/lang/Thread",
|
[&](jint i) { return usage.waiters[i]; });
|
if (env->ExceptionCheck()) {
|
jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(usage.waiters));
|
jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(usage.notify_waiters));
|
return nullptr;
|
}
|
jobjectArray notify_wait = CreateObjectArray(env, usage.notify_waiter_count, "java/lang/Thread",
|
[&](jint i) { return usage.notify_waiters[i]; });
|
if (env->ExceptionCheck()) {
|
jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(usage.waiters));
|
jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(usage.notify_waiters));
|
return nullptr;
|
}
|
return env->NewObject(klass.get(), constructor,
|
obj, usage.owner, usage.entry_count, wait, notify_wait);
|
}
|
|
struct MonitorsData {
|
jclass test_klass;
|
jmethodID monitor_enter;
|
jmethodID monitor_entered;
|
jmethodID monitor_wait;
|
jmethodID monitor_waited;
|
jclass monitor_klass;
|
};
|
|
static void monitorEnterCB(jvmtiEnv* jvmti,
|
JNIEnv* jnienv,
|
jthread thr,
|
jobject obj) {
|
MonitorsData* data = nullptr;
|
if (JvmtiErrorToException(jnienv, jvmti,
|
jvmti->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)))) {
|
return;
|
}
|
if (!jnienv->IsInstanceOf(obj, data->monitor_klass)) {
|
return;
|
}
|
jnienv->CallStaticVoidMethod(data->test_klass, data->monitor_enter, thr, obj);
|
}
|
static void monitorEnteredCB(jvmtiEnv* jvmti,
|
JNIEnv* jnienv,
|
jthread thr,
|
jobject obj) {
|
MonitorsData* data = nullptr;
|
if (JvmtiErrorToException(jnienv, jvmti,
|
jvmti->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)))) {
|
return;
|
}
|
if (!jnienv->IsInstanceOf(obj, data->monitor_klass)) {
|
return;
|
}
|
jnienv->CallStaticVoidMethod(data->test_klass, data->monitor_entered, thr, obj);
|
}
|
static void monitorWaitCB(jvmtiEnv* jvmti,
|
JNIEnv* jnienv,
|
jthread thr,
|
jobject obj,
|
jlong timeout) {
|
MonitorsData* data = nullptr;
|
if (JvmtiErrorToException(jnienv, jvmti,
|
jvmti->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)))) {
|
return;
|
}
|
if (!jnienv->IsInstanceOf(obj, data->monitor_klass)) {
|
return;
|
}
|
jnienv->CallStaticVoidMethod(data->test_klass, data->monitor_wait, thr, obj, timeout);
|
}
|
static void monitorWaitedCB(jvmtiEnv* jvmti,
|
JNIEnv* jnienv,
|
jthread thr,
|
jobject obj,
|
jboolean timed_out) {
|
MonitorsData* data = nullptr;
|
if (JvmtiErrorToException(jnienv, jvmti,
|
jvmti->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)))) {
|
return;
|
}
|
if (!jnienv->IsInstanceOf(obj, data->monitor_klass)) {
|
return;
|
}
|
jnienv->CallStaticVoidMethod(data->test_klass, data->monitor_waited, thr, obj, timed_out);
|
}
|
|
extern "C" JNIEXPORT void JNICALL Java_art_Monitors_setupMonitorEvents(
|
JNIEnv* env,
|
jclass,
|
jclass test_klass,
|
jobject monitor_enter,
|
jobject monitor_entered,
|
jobject monitor_wait,
|
jobject monitor_waited,
|
jclass monitor_klass,
|
jthread thr) {
|
MonitorsData* data = nullptr;
|
if (JvmtiErrorToException(env,
|
jvmti_env,
|
jvmti_env->Allocate(sizeof(MonitorsData),
|
reinterpret_cast<unsigned char**>(&data)))) {
|
return;
|
}
|
jvmtiCapabilities caps;
|
memset(&caps, 0, sizeof(caps));
|
caps.can_generate_monitor_events = 1;
|
if (JvmtiErrorToException(env, jvmti_env, jvmti_env->AddCapabilities(&caps))) {
|
return;
|
}
|
|
memset(data, 0, sizeof(MonitorsData));
|
data->test_klass = reinterpret_cast<jclass>(env->NewGlobalRef(test_klass));
|
data->monitor_enter = env->FromReflectedMethod(monitor_enter);
|
data->monitor_entered = env->FromReflectedMethod(monitor_entered);
|
data->monitor_wait = env->FromReflectedMethod(monitor_wait);
|
data->monitor_waited = env->FromReflectedMethod(monitor_waited);
|
data->monitor_klass = reinterpret_cast<jclass>(env->NewGlobalRef(monitor_klass));
|
MonitorsData* old_data = nullptr;
|
if (JvmtiErrorToException(env, jvmti_env,
|
jvmti_env->GetEnvironmentLocalStorage(
|
reinterpret_cast<void**>(&old_data)))) {
|
return;
|
} else if (old_data != nullptr && old_data->test_klass != nullptr) {
|
ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException"));
|
env->ThrowNew(rt_exception.get(), "Environment already has local storage set!");
|
return;
|
}
|
if (JvmtiErrorToException(env, jvmti_env, jvmti_env->SetEnvironmentLocalStorage(data))) {
|
return;
|
}
|
|
current_callbacks.MonitorContendedEnter = monitorEnterCB;
|
current_callbacks.MonitorContendedEntered = monitorEnteredCB;
|
current_callbacks.MonitorWait = monitorWaitCB;
|
current_callbacks.MonitorWaited = monitorWaitedCB;
|
if (JvmtiErrorToException(env,
|
jvmti_env,
|
jvmti_env->SetEventCallbacks(¤t_callbacks,
|
sizeof(current_callbacks)))) {
|
return;
|
}
|
if (JvmtiErrorToException(env,
|
jvmti_env,
|
jvmti_env->SetEventNotificationMode(
|
JVMTI_ENABLE, JVMTI_EVENT_MONITOR_CONTENDED_ENTER, thr))) {
|
return;
|
}
|
if (JvmtiErrorToException(env,
|
jvmti_env,
|
jvmti_env->SetEventNotificationMode(
|
JVMTI_ENABLE, JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, thr))) {
|
return;
|
}
|
if (JvmtiErrorToException(env,
|
jvmti_env,
|
jvmti_env->SetEventNotificationMode(
|
JVMTI_ENABLE, JVMTI_EVENT_MONITOR_WAIT, thr))) {
|
return;
|
}
|
if (JvmtiErrorToException(env,
|
jvmti_env,
|
jvmti_env->SetEventNotificationMode(
|
JVMTI_ENABLE, JVMTI_EVENT_MONITOR_WAITED, thr))) {
|
return;
|
}
|
}
|
|
} // namespace common_monitors
|
} // namespace art
|
