208 lines
7.0 KiB
C++
208 lines
7.0 KiB
C++
/*
|
|
* Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
#include <cstdlib>
|
|
#include <cstring>
|
|
#include <jvmti.h>
|
|
#include "jvmti_common.hpp"
|
|
|
|
extern "C" {
|
|
|
|
static jvmtiEnv *jvmti;
|
|
static volatile int vthread_started_cnt = 0;
|
|
static volatile int vthread_ended_cnt = 0;
|
|
static volatile int thread_started_cnt = 0;
|
|
static volatile int thread_ended_cnt = 0;
|
|
|
|
static jrawMonitorID agent_lock = nullptr;
|
|
static volatile jboolean agent_started = JNI_FALSE;
|
|
|
|
static void check_and_print_thread_names(jvmtiEnv *jvmti, JNIEnv* jni, jthread thread,
|
|
bool is_virtual, const char* msg) {
|
|
jthread cthread = nullptr;
|
|
jthread vthread = nullptr;
|
|
|
|
if (is_virtual) {
|
|
vthread = thread;
|
|
cthread = get_carrier_thread(jvmti, jni, vthread);
|
|
if (jni->IsVirtualThread(cthread)) {
|
|
fatal(jni, "Failed: expected to be carrier thread");
|
|
}
|
|
} else {
|
|
cthread = thread;
|
|
}
|
|
char* ctname = get_thread_name(jvmti, jni, cthread);
|
|
char* vtname = vthread == nullptr ? nullptr : get_thread_name(jvmti, jni, vthread);
|
|
|
|
LOG("Event: %s virtual: %d ct: %s vt: %s\n", msg, is_virtual, ctname, vtname);
|
|
|
|
deallocate(jvmti, jni, (void*)ctname);
|
|
deallocate(jvmti, jni, (void*)vtname);
|
|
}
|
|
|
|
void JNICALL VirtualThreadStart(jvmtiEnv *jvmti, JNIEnv* jni, jthread thread) {
|
|
if (!jni->IsVirtualThread(thread)) {
|
|
fatal(jni, "Failed: expected to be virtual thread");
|
|
}
|
|
RawMonitorLocker agent_locker(jvmti, jni, agent_lock);
|
|
|
|
vthread_started_cnt++;
|
|
check_and_print_thread_names(jvmti, jni, thread, /* is_virtual */ true, "VirtualThreadStart");
|
|
}
|
|
|
|
void JNICALL VirtualThreadEnd(jvmtiEnv *jvmti, JNIEnv* jni, jthread thread) {
|
|
if (!jni->IsVirtualThread(thread)) {
|
|
fatal(jni, "Failed: expected to be virtual thread");
|
|
}
|
|
RawMonitorLocker agent_locker(jvmti, jni, agent_lock);
|
|
|
|
vthread_ended_cnt++;
|
|
check_and_print_thread_names(jvmti, jni, thread, /* is_virtual */ true, "VirtualThreadEnd");
|
|
}
|
|
|
|
void JNICALL ThreadStart(jvmtiEnv *jvmti, JNIEnv* jni, jthread thread) {
|
|
if (jni->IsVirtualThread(thread)) {
|
|
fatal(jni, "Failed: expected to be platform thread");
|
|
}
|
|
RawMonitorLocker agent_locker(jvmti, jni, agent_lock);
|
|
|
|
thread_started_cnt++;
|
|
check_and_print_thread_names(jvmti, jni, thread, /*is_virtual*/ false, "ThreadStart");
|
|
}
|
|
|
|
void JNICALL ThreadEnd(jvmtiEnv *jvmti, JNIEnv* jni, jthread thread) {
|
|
if (jni->IsVirtualThread(thread)) {
|
|
fatal(jni, "Failed: expected to be platform thread");
|
|
}
|
|
RawMonitorLocker agent_locker(jvmti, jni, agent_lock);
|
|
|
|
thread_ended_cnt++;
|
|
check_and_print_thread_names(jvmti, jni, thread, /*is_virtual*/ false, "ThreadEnd");
|
|
}
|
|
|
|
JNIEXPORT jboolean JNICALL
|
|
Java_ToggleNotifyJvmtiTest_IsAgentStarted(JNIEnv* jni, jclass clazz) {
|
|
RawMonitorLocker agent_locker(jvmti, jni, agent_lock);
|
|
|
|
return agent_started;
|
|
}
|
|
|
|
JNIEXPORT jint JNICALL
|
|
Java_ToggleNotifyJvmtiTest_VirtualThreadStartedCount(JNIEnv* jni, jclass clazz) {
|
|
RawMonitorLocker agent_locker(jvmti, jni, agent_lock);
|
|
|
|
return vthread_started_cnt;
|
|
}
|
|
|
|
JNIEXPORT jint JNICALL
|
|
Java_ToggleNotifyJvmtiTest_VirtualThreadEndedCount(JNIEnv* jni, jclass clazz) {
|
|
RawMonitorLocker agent_locker(jvmti, jni, agent_lock);
|
|
|
|
return vthread_ended_cnt;
|
|
}
|
|
|
|
JNIEXPORT jint JNICALL
|
|
Java_ToggleNotifyJvmtiTest_ThreadStartedCount(JNIEnv* jni, jclass clazz) {
|
|
RawMonitorLocker agent_locker(jvmti, jni, agent_lock);
|
|
|
|
return thread_started_cnt;
|
|
}
|
|
|
|
JNIEXPORT jint JNICALL
|
|
Java_ToggleNotifyJvmtiTest_ThreadEndedCount(JNIEnv* jni, jclass clazz) {
|
|
RawMonitorLocker agent_locker(jvmti, jni, agent_lock);
|
|
|
|
return thread_ended_cnt;
|
|
}
|
|
|
|
jint agent_init(JavaVM *jvm, char *options, void *reserved) {
|
|
jvmtiCapabilities caps;
|
|
jvmtiEventCallbacks callbacks;
|
|
jvmtiError err;
|
|
|
|
if (jvm->GetEnv((void **) (&jvmti), JVMTI_VERSION) != JNI_OK) {
|
|
return JNI_ERR;
|
|
}
|
|
memset(&caps, 0, sizeof(caps));
|
|
memset(&callbacks, 0, sizeof(callbacks));
|
|
callbacks.VirtualThreadStart = &VirtualThreadStart;
|
|
callbacks.VirtualThreadEnd = &VirtualThreadEnd;
|
|
callbacks.ThreadStart = &ThreadStart;
|
|
callbacks.ThreadEnd = &ThreadEnd;
|
|
|
|
{
|
|
caps.can_support_virtual_threads = 1;
|
|
|
|
err = jvmti->AddCapabilities(&caps);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
LOG("Agent init: error in JVMTI AddCapabilities: %s (%d)\n", TranslateError(err), err);
|
|
return JNI_ERR;
|
|
}
|
|
err = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_VIRTUAL_THREAD_START, nullptr);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
LOG("Agent init: error in JVMTI SetEventNotificationMode: %s (%d)\n", TranslateError(err), err);
|
|
return JNI_ERR;
|
|
}
|
|
err = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_VIRTUAL_THREAD_END, nullptr);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
LOG("Agent init: error in JVMTI SetEventNotificationMode: %s (%d)\n", TranslateError(err), err);
|
|
return JNI_ERR;
|
|
}
|
|
err = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_THREAD_START, nullptr);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
LOG("Agent init: error in JVMTI SetEventNotificationMode: %s (%d)\n", TranslateError(err), err);
|
|
return JNI_ERR;
|
|
}
|
|
err = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_THREAD_END, nullptr);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
LOG("Agent init: error in JVMTI SetEventNotificationMode: %s (%d)\n", TranslateError(err), err);
|
|
return JNI_ERR;
|
|
}
|
|
}
|
|
LOG("Agent init: can_support_virtual_threads capability: %d\n", caps.can_support_virtual_threads);
|
|
|
|
err = jvmti->SetEventCallbacks(&callbacks, (jint)sizeof(callbacks));
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
LOG("Agent init: error in JVMTI AddCapabilities: %s (%d)\n", TranslateError(err), err);
|
|
return JNI_ERR;
|
|
}
|
|
agent_lock = create_raw_monitor(jvmti, "agent_lock");
|
|
agent_started = JNI_TRUE;
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
JNIEXPORT jint JNICALL
|
|
Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
|
|
LOG("Agent_OnLoad started\n");
|
|
return agent_init(jvm, options, reserved);
|
|
}
|
|
|
|
JNIEXPORT jint JNICALL
|
|
Agent_OnAttach(JavaVM *jvm, char *options, void *reserved) {
|
|
LOG("Agent_OnAttach started\n");
|
|
return agent_init(jvm, options, reserved);
|
|
}
|
|
|
|
} // extern "C"
|