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3d919ad43a
8375362: Deadlock with unmount of suspended virtual thread interrupting another virtual thread Reviewed-by: lmesnik, pchilanomate
119 lines
3.9 KiB
C++
119 lines
3.9 KiB
C++
/*
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* Copyright (c) 2026, 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.hpp"
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// set by Agent_OnLoad
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static jvmtiEnv* jvmti = nullptr;
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static jrawMonitorID agent_event_lock = nullptr;
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extern "C" {
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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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JNIEXPORT void JNICALL
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Java_ThreadStateTest2_testSuspendResume(JNIEnv* jni, jclass klass, jthread thread) {
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jvmtiError err;
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RawMonitorLocker event_locker(jvmti, jni, agent_event_lock);
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LOG("\nMAIN: testSuspendResume: before suspend\n");
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err = jvmti->SuspendThread(thread);
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if (err == JVMTI_ERROR_THREAD_NOT_ALIVE) {
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return;
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}
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check_jvmti_status(jni, err, "testSuspendResume error in JVMTI SuspendThread");
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LOG("\nMAIN: testSuspendResume: after suspend\n");
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event_locker.wait(1);
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LOG("MAIN: testSuspendResume: before resume\n");
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err = jvmti->ResumeThread(thread);
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check_jvmti_status(jni, err, "testSuspendResume error in JVMTI ResumeThread");
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}
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JNIEXPORT void JNICALL
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Java_ThreadStateTest2_setMonitorContendedMode(JNIEnv* jni, jclass klass, jboolean enable) {
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set_event_notification_mode(jvmti, jni, enable ? JVMTI_ENABLE : JVMTI_DISABLE, JVMTI_EVENT_MONITOR_CONTENDED_ENTER, nullptr);
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}
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JNIEXPORT void JNICALL
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Java_ThreadStateTest2_testInterruptThread(JNIEnv* jni, jclass klass, jthread vthread) {
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char* tname = get_thread_name(jvmti, jni, vthread);
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LOG("VT-2: testInterruptThread: %s\n", tname);
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jvmtiError err = jvmti->InterruptThread(vthread);
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check_jvmti_status(jni, err, "testInterruptThread error in JVMTI InterruptThread");
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}
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JNIEXPORT jint JNICALL
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Java_ThreadStateTest2_testGetThreadState(JNIEnv* jni, jclass klass, jthread vthread) {
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jint state = get_thread_state(jvmti, jni, vthread);
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char* tname = get_thread_name(jvmti, jni, vthread);
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LOG("VT-2: testGetThreadState: %s state: %x\n", tname, state);
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return state;
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}
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JNIEXPORT jint JNICALL
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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_suspend = 1;
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caps.can_signal_thread = 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.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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agent_event_lock = create_raw_monitor(jvmti, "agent_event_lock");
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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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