254 lines
8.5 KiB
Java
254 lines
8.5 KiB
Java
/*
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* Copyright (c) 2023, 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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/*
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* @test id=default
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* @summary Verifies JVMTI PopFrame support for virtual threads.
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* @requires vm.continuations
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* @run main/othervm/native -agentlib:PopFrameTest PopFrameTest
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*/
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/*
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* @test id=no-vmcontinuations
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* @summary Verifies JVMTI PopFrame support for bound virtual threads.
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* @run main/othervm/native -agentlib:PopFrameTest -XX:+UnlockExperimentalVMOptions -XX:-VMContinuations PopFrameTest
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*/
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/*
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* @test id=platform
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* @summary Verifies JVMTI PopFrame support for platform threads.
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* @run main/othervm/native -agentlib:PopFrameTest PopFrameTest platform
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*/
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import java.lang.AssertionError;
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/*
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* The test exercises the JVMTI function PopFrame.
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* The test creates a new virtual or platform thread.
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* Its method run() invokes the following methods:
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* - method A() that is blocked on a monitor
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* - method B() that is stopped at a breakpoint
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* - method C() that forces agent to call PopFrame on its own thread
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* JVMTI PopFrame is called in all cases.
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*/
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public class PopFrameTest {
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private static final String agentLib = "PopFrameTest";
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static final int JVMTI_ERROR_NONE = 0;
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static final int THREAD_NOT_SUSPENDED = 13;
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static final int OPAQUE_FRAME = 32;
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static final int PASSED = 0;
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static final int FAILED = 2;
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static void log(String str) { System.out.println(str); }
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static native void prepareAgent(Class taskClass, boolean doPopFrame);
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static native void suspendThread(Thread thread);
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static native void resumeThread(Thread thread);
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static native void ensureAtBreakpoint();
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static native void notifyAtBreakpoint();
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static native int popFrame(Thread thread);
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static int status = PASSED;
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static boolean is_virtual = true;
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static void setFailed(String msg) {
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log("\nFAILED: " + msg);
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status = FAILED;
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}
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static void throwFailed(String msg) {
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log("\nFAILED: " + msg);
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throw new RuntimeException("PopFrameTest failed!");
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}
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public static void main(String args[]) {
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is_virtual = !(args.length > 0 && args[0].equals("platform"));
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run();
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if (status == FAILED) {
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throwFailed("PopFrameTest!");
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}
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log("\nPopFrameTest passed");
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}
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public static void run() {
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TestTask testTask = new TestTask();
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Thread testTaskThread = null;
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int errCode;
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log("\nMain #A: method A() must be blocked on entering a synchronized statement");
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if (is_virtual) {
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testTaskThread = Thread.ofVirtual().name("TestTaskThread").start(testTask);
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} else {
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testTaskThread = Thread.ofPlatform().name("TestTaskThread").start(testTask);
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}
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{
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TestTask.ensureAtPointA();
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log("\nMain #A.1: unsuspended");
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errCode = popFrame(testTaskThread);
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if (errCode != THREAD_NOT_SUSPENDED) {
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throwFailed("Main #A.1: expected THREAD_NOT_SUSPENDED instead of: " + errCode);
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} else {
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log("Main #A.1: got expected THREAD_NOT_SUSPENDED");
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}
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log("\nMain #A.2: suspended");
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suspendThread(testTaskThread);
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errCode = popFrame(testTaskThread);
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if (errCode != JVMTI_ERROR_NONE) {
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throwFailed("Main #A.2: expected JVMTI_ERROR_NONE instead of: " + errCode);
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} else {
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log("Main #A.2: got expected JVMTI_ERROR_NONE");
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}
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resumeThread(testTaskThread);
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TestTask.clearDoLoop();
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TestTask.sleep(5);
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}
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log("\nMain #B: method B() must be blocked in a breakpoint event handler");
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{
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ensureAtBreakpoint();
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log("\nMain #B.1: unsuspended");
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errCode = popFrame(testTaskThread);
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if (errCode != THREAD_NOT_SUSPENDED) {
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throwFailed("Main #B.1: expected THREAD_NOT_SUSPENDED instead of: " + errCode);
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}
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log("Main #B.1: got expected THREAD_NOT_SUSPENDED");
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log("\nMain #B.2: suspended");
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suspendThread(testTaskThread);
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errCode = popFrame(testTaskThread);
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if (errCode != JVMTI_ERROR_NONE) {
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throwFailed("Main #B.2: expected JVMTI_ERROR_NONE");
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}
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log("Main #B.2: got expected JVMTI_ERROR_NONE");
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resumeThread(testTaskThread);
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notifyAtBreakpoint();
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log("\nMain #B.3: unsuspended, call PopFrame on own thread");
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ensureAtBreakpoint();
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notifyAtBreakpoint();
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TestTask.sleep(5);
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}
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log("\nMain #C: method C() calls PopFrame on its own thread");
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{
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// PopFrame is called from method C() on own thread. Expected to return OPAQUE_FRAME.
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// No suspension of the test task thread is required or can be done in this case.
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TestTask.ensureFinished();
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}
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try {
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testTaskThread.join();
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} catch (InterruptedException ex) {
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throwFailed("Unexpected " + ex);
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}
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}
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static class TestTask implements Runnable {
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static void log(String str) { System.out.println(str); }
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static volatile boolean doLoop = true;
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static volatile boolean atPointA = false;
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static volatile boolean finished = false;
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static void sleep(long millis) {
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try {
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Thread.sleep(millis);
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} catch (InterruptedException e) {
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throw new RuntimeException("Interruption in TestTask.sleep: \n\t" + e);
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}
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}
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// Ensure thread is ready.
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static void ensureAtPointA() {
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while (!atPointA) {
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sleep(1);
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}
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}
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// Ensure thread is finished.
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static void ensureFinished() {
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while (!finished) {
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sleep(1);
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}
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}
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static void clearDoLoop() {
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doLoop = false;
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}
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public void run() {
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log("TestTask.run: started");
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A();
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sleep(1); // to cause yield
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prepareAgent(TestTask.class, false); // No doPopFrame
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B();
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sleep(1); // to cause yield
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prepareAgent(TestTask.class, true); // doPopFrame
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B();
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sleep(1); // to cause yield
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C();
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finished = true;
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}
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// Method is busy in a while loop.
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// PopFrame is used two times:
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// - when not suspended: THREAD_NOT_SUSPENDED is expected
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// - when suspended: JVMTI_ERROR_NONE is expected
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static void A() {
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log("TestTask.A: started");
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atPointA = true;
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while (doLoop) {
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}
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log("TestTask.A: finished");
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}
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// A breakpoint is set at start of this method.
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// PopFrame is used two times:
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// - when not suspended: THREAD_NOT_SUSPENDED is expected
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// - when suspended: expected to succeed
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static void B() {
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log("TestTask.B: started");
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}
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// This method uses PopFrame on its own thread. It is expected to return OPAQUE_FRAME.
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static void C() {
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log("TestTask.C: started");
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int errCode = PopFrameTest.popFrame(Thread.currentThread());
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if (errCode == OPAQUE_FRAME) {
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log("TestTask.C: got expected OPAQUE_FRAME");
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} else {
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setFailed("TestTask.C: expected OPAQUE_FRAME from PopFrame instead of: " + errCode);
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}
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}
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}
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}
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