90 lines
3.1 KiB
C++
90 lines
3.1 KiB
C++
/*
|
|
* Copyright (c) 2023, 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 <jni.h>
|
|
#include <jvmti.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include "jvmti_common.h"
|
|
|
|
// set by Agent_OnLoad
|
|
static jvmtiEnv* jvmti = nullptr;
|
|
|
|
extern "C" {
|
|
|
|
static void JNICALL
|
|
SingleStep(jvmtiEnv *jvmti, JNIEnv* jni, jthread thread,
|
|
jmethodID method, jlocation location) {
|
|
}
|
|
|
|
static void JNICALL
|
|
MonitorContended(jvmtiEnv* jvmti, JNIEnv* jni_env, jthread thread,
|
|
jobject object) {
|
|
}
|
|
|
|
JNIEXPORT void JNICALL
|
|
Java_ThreadStateTest_setSingleSteppingMode(JNIEnv* jni, jclass klass, jboolean enable) {
|
|
jvmtiError err = jvmti->SetEventNotificationMode(enable ? JVMTI_ENABLE : JVMTI_DISABLE, JVMTI_EVENT_SINGLE_STEP, nullptr);
|
|
check_jvmti_status(jni, err, "event handler: error in JVMTI SetEventNotificationMode for event JVMTI_EVENT_SINGLE_STEP");
|
|
}
|
|
|
|
JNIEXPORT void JNICALL
|
|
Java_ThreadStateTest_setMonitorContendedMode(JNIEnv* jni, jclass klass, jboolean enable) {
|
|
jvmtiError err = jvmti->SetEventNotificationMode(enable ? JVMTI_ENABLE : JVMTI_DISABLE, JVMTI_EVENT_MONITOR_CONTENDED_ENTER, nullptr);
|
|
check_jvmti_status(jni, err, "event handler: error in JVMTI SetEventNotificationMode for event JVMTI_EVENT_MONITOR_CONTENDED_ENTER");
|
|
}
|
|
|
|
JNIEXPORT jint JNICALL Agent_OnLoad(JavaVM* jvm, char* options, void* reserved) {
|
|
jvmtiEventCallbacks callbacks;
|
|
jvmtiCapabilities caps;
|
|
jvmtiError err;
|
|
|
|
printf("Agent_OnLoad started\n");
|
|
if (jvm->GetEnv((void **) (&jvmti), JVMTI_VERSION) != JNI_OK) {
|
|
LOG("error in GetEnv");
|
|
return JNI_ERR;
|
|
}
|
|
|
|
memset(&caps, 0, sizeof(caps));
|
|
caps.can_generate_single_step_events = 1;
|
|
caps.can_support_virtual_threads = 1;
|
|
caps.can_generate_monitor_events = 1;
|
|
|
|
err = jvmti->AddCapabilities(&caps);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
LOG("error in JVMTI AddCapabilities: %d\n", err);
|
|
}
|
|
|
|
memset(&callbacks, 0, sizeof(callbacks));
|
|
callbacks.SingleStep = &SingleStep;
|
|
callbacks.MonitorContendedEnter = &MonitorContended;
|
|
err = jvmti->SetEventCallbacks(&callbacks, sizeof(jvmtiEventCallbacks));
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
LOG("Agent_OnLoad: Error in JVMTI SetEventCallbacks: %d\n", err);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
} // extern "C"
|