135 lines
5.3 KiB
C++
135 lines
5.3 KiB
C++
/*
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* Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <jni.h>
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#include <jvmti.h>
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#include <stdio.h>
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#include <string.h>
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#include "jvmti_common.h"
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// set by Agent_OnLoad
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static jvmtiEnv* jvmti = nullptr;
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static const jint EXP_VT_STATE = JVMTI_THREAD_STATE_ALIVE | JVMTI_THREAD_STATE_RUNNABLE;
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static const jint EXP_CT_STATE = JVMTI_THREAD_STATE_ALIVE | JVMTI_THREAD_STATE_WAITING |
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JVMTI_THREAD_STATE_WAITING_INDEFINITELY;
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static const jint MAX_FRAME_COUNT = 32;
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extern "C" {
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static void JNICALL
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SingleStep(jvmtiEnv *jvmti, JNIEnv* jni, jthread thread,
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jmethodID method, jlocation location) {
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}
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static void JNICALL
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MonitorContended(jvmtiEnv* jvmti, JNIEnv* jni, jthread thread,
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jobject object) {
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}
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static void JNICALL
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check_thread_state(jvmtiEnv* jvmti, JNIEnv* jni, jthread thread, jint state, jint exp_state, const char* msg) {
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if (state != exp_state) {
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const char* tname = get_thread_name(jvmti, jni, thread);
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LOG("FAILED: %p: %s: thread state: %x expected state: %x\n",
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(void*)thread, tname, state, exp_state);
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deallocate(jvmti, jni, (void*)tname);
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jni->FatalError(msg);
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}
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}
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JNIEXPORT void JNICALL
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Java_ThreadStateTest_setSingleSteppingMode(JNIEnv* jni, jclass klass, jboolean enable) {
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jvmtiError err = jvmti->SetEventNotificationMode(enable ? JVMTI_ENABLE : JVMTI_DISABLE, JVMTI_EVENT_SINGLE_STEP, nullptr);
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check_jvmti_status(jni, err, "setSingleSteppingMode: error in JVMTI SetEventNotificationMode for JVMTI_EVENT_SINGLE_STEP");
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}
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JNIEXPORT void JNICALL
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Java_ThreadStateTest_setMonitorContendedMode(JNIEnv* jni, jclass klass, jboolean enable) {
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jvmtiError err = jvmti->SetEventNotificationMode(enable ? JVMTI_ENABLE : JVMTI_DISABLE, JVMTI_EVENT_MONITOR_CONTENDED_ENTER, nullptr);
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check_jvmti_status(jni, err, "setMonitorContendedMode: error in JVMTI SetEventNotificationMode for JVMTI_EVENT_MONITOR_CONTENDED_ENTER");
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}
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JNIEXPORT void JNICALL
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Java_ThreadStateTest_testGetThreadState(JNIEnv* jni, jclass klass, jthread vthread) {
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jthread cthread = get_carrier_thread(jvmti, jni, vthread);
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jint ct_state = get_thread_state(jvmti, jni, cthread);
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jint vt_state = get_thread_state(jvmti, jni, vthread);
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check_thread_state(jvmti, jni, cthread, ct_state, EXP_CT_STATE,
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"Failed: unexpected carrier thread state from JVMTI GetThreadState");
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check_thread_state(jvmti, jni, vthread, vt_state, EXP_VT_STATE,
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"Failed: unexpected virtual thread state from JVMTI GetThreadState");
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}
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JNIEXPORT void JNICALL
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Java_ThreadStateTest_testGetThreadListStackTraces(JNIEnv* jni, jclass klass, jthread vthread) {
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jthread cthread = get_carrier_thread(jvmti, jni, vthread);
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jthread threads[2] = { cthread, vthread };
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jvmtiStackInfo* stackInfo = nullptr;
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jvmtiError err = jvmti->GetThreadListStackTraces(2, threads, MAX_FRAME_COUNT, &stackInfo);
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check_jvmti_status(jni, err, "testGetThreadState: error in JVMTI GetThreadListStackTraces");
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check_thread_state(jvmti, jni, cthread, stackInfo[0].state, EXP_CT_STATE,
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"Failed: unexpected carrier thread state from JVMTI GetThreadListStackTraces");
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check_thread_state(jvmti, jni, vthread, stackInfo[1].state, EXP_VT_STATE,
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"Failed: unexpected virtual thread state from JVMTI GetThreadListStackTraces");
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}
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JNIEXPORT jint JNICALL Agent_OnLoad(JavaVM* jvm, char* options, void* reserved) {
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jvmtiEventCallbacks callbacks;
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jvmtiCapabilities caps;
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jvmtiError err;
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printf("Agent_OnLoad: started\n");
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if (jvm->GetEnv((void **) (&jvmti), JVMTI_VERSION) != JNI_OK) {
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LOG("Agent_OnLoad: error in GetEnv");
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return JNI_ERR;
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}
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memset(&caps, 0, sizeof(caps));
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caps.can_generate_single_step_events = 1;
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caps.can_support_virtual_threads = 1;
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caps.can_generate_monitor_events = 1;
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err = jvmti->AddCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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LOG("Agent_OnLoad: error in JVMTI AddCapabilities: %d\n", err);
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}
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memset(&callbacks, 0, sizeof(callbacks));
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callbacks.SingleStep = &SingleStep;
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callbacks.MonitorContendedEnter = &MonitorContended;
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err = jvmti->SetEventCallbacks(&callbacks, sizeof(jvmtiEventCallbacks));
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if (err != JVMTI_ERROR_NONE) {
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LOG("Agent_OnLoad: Error in JVMTI SetEventCallbacks: %d\n", err);
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}
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printf("Agent_OnLoad: finished\n");
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return 0;
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}
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} // extern "C"
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