| /* |
| * Copyright (c) 2019 SAP SE. 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. |
| */ |
| |
| /** |
| * @test |
| * @bug 8230677 |
| * @summary Test JVMTI's GetOwnedMonitorInfo with scalar replaced objects and eliminated locks on stack (optimizations based on escape analysis). |
| * @comment Without RFE 8227745 escape analysis needs to be switched off to pass the test. For the implementation of RFE 8227745 it serves as a regression test. |
| * @requires (vm.compMode != "Xcomp" & vm.compiler2.enabled) |
| * @library /test/lib |
| * @compile GetOwnedMonitorInfoWithEATest.java |
| * @run main/othervm/native |
| * -agentlib:GetOwnedMonitorInfoWithEATest |
| * -XX:+UnlockDiagnosticVMOptions |
| * -Xms128m -Xmx128m |
| * -XX:CompileCommand=dontinline,*::dontinline_* |
| * -XX:+PrintCompilation |
| * -XX:+PrintInlining |
| * -XX:-TieredCompilation |
| * -Xbatch |
| * -XX:CICompilerCount=1 |
| * -XX:+DoEscapeAnalysis -XX:+EliminateAllocations -XX:+EliminateLocks -XX:+EliminateNestedLocks -XX:+UseBiasedLocking |
| * GetOwnedMonitorInfoWithEATest |
| * @run main/othervm/native |
| * -agentlib:GetOwnedMonitorInfoWithEATest |
| * -XX:+UnlockDiagnosticVMOptions |
| * -Xms128m -Xmx128m |
| * -XX:CompileCommand=dontinline,*::dontinline_* |
| * -XX:+PrintCompilation |
| * -XX:+PrintInlining |
| * -XX:-TieredCompilation |
| * -Xbatch |
| * -XX:CICompilerCount=1 |
| * -XX:+DoEscapeAnalysis -XX:+EliminateAllocations -XX:-EliminateLocks -XX:+EliminateNestedLocks -XX:+UseBiasedLocking -XX:-UseOptoBiasInlining |
| * GetOwnedMonitorInfoWithEATest |
| * @run main/othervm/native |
| * -agentlib:GetOwnedMonitorInfoWithEATest |
| * -XX:+UnlockDiagnosticVMOptions |
| * -Xms128m -Xmx128m |
| * -XX:CompileCommand=dontinline,*::dontinline_* |
| * -XX:+PrintCompilation |
| * -XX:+PrintInlining |
| * -XX:-TieredCompilation |
| * -Xbatch |
| * -XX:CICompilerCount=1 |
| * -XX:+DoEscapeAnalysis -XX:-EliminateAllocations -XX:+EliminateLocks -XX:+EliminateNestedLocks -XX:+UseBiasedLocking |
| * GetOwnedMonitorInfoWithEATest |
| * @run main/othervm/native |
| * -agentlib:GetOwnedMonitorInfoWithEATest |
| * -XX:+UnlockDiagnosticVMOptions |
| * -Xms128m -Xmx128m |
| * -XX:CompileCommand=dontinline,*::dontinline_* |
| * -XX:+PrintCompilation |
| * -XX:+PrintInlining |
| * -XX:-TieredCompilation |
| * -Xbatch |
| * -XX:CICompilerCount=1 |
| * -XX:-DoEscapeAnalysis -XX:-EliminateAllocations -XX:+EliminateLocks -XX:+EliminateNestedLocks -XX:+UseBiasedLocking |
| * GetOwnedMonitorInfoWithEATest |
| * @run main/othervm/native |
| * -agentlib:GetOwnedMonitorInfoWithEATest |
| * -XX:+UnlockDiagnosticVMOptions |
| * -Xms128m -Xmx128m |
| * -XX:CompileCommand=dontinline,*::dontinline_* |
| * -XX:+PrintCompilation |
| * -XX:+PrintInlining |
| * -XX:-TieredCompilation |
| * -Xbatch |
| * -XX:CICompilerCount=1 |
| * -XX:+DoEscapeAnalysis -XX:+EliminateAllocations -XX:+EliminateLocks -XX:+EliminateNestedLocks -XX:-UseBiasedLocking |
| * GetOwnedMonitorInfoWithEATest |
| * @run main/othervm/native |
| * -agentlib:GetOwnedMonitorInfoWithEATest |
| * -XX:+UnlockDiagnosticVMOptions |
| * -Xms128m -Xmx128m |
| * -XX:CompileCommand=dontinline,*::dontinline_* |
| * -XX:+PrintCompilation |
| * -XX:+PrintInlining |
| * -XX:-TieredCompilation |
| * -Xbatch |
| * -XX:CICompilerCount=1 |
| * -XX:+DoEscapeAnalysis -XX:-EliminateAllocations -XX:+EliminateLocks -XX:+EliminateNestedLocks -XX:-UseBiasedLocking |
| * GetOwnedMonitorInfoWithEATest |
| * @run main/othervm/native |
| * -agentlib:GetOwnedMonitorInfoWithEATest |
| * -XX:+UnlockDiagnosticVMOptions |
| * -Xms128m -Xmx128m |
| * -XX:CompileCommand=dontinline,*::dontinline_* |
| * -XX:+PrintCompilation |
| * -XX:+PrintInlining |
| * -XX:-TieredCompilation |
| * -Xbatch |
| * -XX:CICompilerCount=1 |
| * -XX:-DoEscapeAnalysis -XX:-EliminateAllocations -XX:+EliminateLocks -XX:+EliminateNestedLocks -XX:-UseBiasedLocking |
| * GetOwnedMonitorInfoWithEATest |
| */ |
| |
| import jdk.test.lib.Asserts; |
| |
| public class GetOwnedMonitorInfoWithEATest { |
| |
| public static final int COMPILE_THRESHOLD = 20000; |
| |
| /** |
| * Native wrapper arround JVMTI's GetOwnedMonitorInfo(). |
| * @param t The thread for which the owned monitors information should be retrieved. |
| * @param ownedMonitors Array filled in by the call with the objects associated |
| * with the monitors owned by the given thread. |
| * @param depths Per owned monitor the depth of the frame were it was locked. |
| * Filled in by the call |
| * @return Number of monitors owned by the given thread. |
| */ |
| public static native int getOwnedMonitorInfo(Thread t, Object[] ownedMonitors); |
| |
| public static void main(String[] args) throws Exception { |
| new GetOwnedMonitorInfoWithEATest().runTest(); |
| } |
| |
| public void runTest() throws Exception { |
| new TestCase_1().run(); |
| new TestCase_2().run(); |
| } |
| |
| public static abstract class TestCaseBase implements Runnable { |
| |
| public long checkSum; |
| public boolean doLoop; |
| public volatile long loopCount; |
| public volatile boolean targetIsInLoop; |
| |
| public void run() { |
| try { |
| msgHL("Executing test case " + getClass().getName()); |
| warmUp(); |
| runTest(); |
| } catch (Exception e) { |
| Asserts.fail("Unexpected Exception", e); |
| } |
| } |
| |
| public void warmUp() { |
| int callCount = COMPILE_THRESHOLD + 1000; |
| doLoop = true; |
| while (callCount-- > 0) { |
| dontinline_testMethod(); |
| } |
| } |
| |
| public abstract void runTest() throws Exception; |
| public abstract void dontinline_testMethod(); |
| |
| public long dontinline_endlessLoop() { |
| long cs = checkSum; |
| while (doLoop && loopCount-- > 0) { |
| targetIsInLoop = true; |
| checkSum += checkSum % ++cs; |
| } |
| loopCount = 3; |
| targetIsInLoop = false; |
| return checkSum; |
| } |
| |
| public void waitUntilTargetThreadHasEnteredEndlessLoop() throws Exception { |
| while(!targetIsInLoop) { |
| msg("Target has not yet entered the loop. Sleep 200ms."); |
| try { Thread.sleep(200); } catch (InterruptedException e) { /*ignore */ } |
| } |
| msg("Target has entered the loop."); |
| } |
| |
| public void terminateEndlessLoop() throws Exception { |
| msg("Terminate endless loop"); |
| do { |
| doLoop = false; |
| } while(targetIsInLoop); |
| } |
| |
| public void msg(String m) { |
| System.out.println(); |
| System.out.println("### " + m); |
| System.out.println(); |
| } |
| |
| public void msgHL(String m) { |
| System.out.println(); |
| System.out.println("#####################################################"); |
| System.out.println("### " + m); |
| System.out.println("###"); |
| System.out.println(); |
| } |
| } |
| |
| /** |
| * Starts target thread T and then queries monitor information for T using JVMTI's GetOwnedMonitorInfo(). |
| * With escape analysis enabled the jit compiled method {@link #dontinline_testMethod()} has |
| * scalar replaced objects with eliminated (nested) locking in scope when the monitor |
| * information is retrieved. Effectively the objects escape through the JVMTI call. This works |
| * only with RFE 8227745. Without it escape analysis needs to be disabled. |
| */ |
| public static class TestCase_1 extends TestCaseBase { |
| |
| public void runTest() throws Exception { |
| loopCount = 1L << 62; // endless loop |
| Thread t1 = new Thread(() -> dontinline_testMethod(), "Target Thread"); |
| t1.start(); |
| try { |
| waitUntilTargetThreadHasEnteredEndlessLoop(); |
| int expectedMonitorCount = 1; |
| int resultSize = expectedMonitorCount + 3; |
| Object[] ownedMonitors = new Object[resultSize]; |
| msg("Get monitor info"); |
| int monitorCount = getOwnedMonitorInfo(t1, ownedMonitors); |
| terminateEndlessLoop(); |
| t1.join(); |
| Asserts.assertGreaterThanOrEqual(monitorCount, 0, "getOwnedMonitorsFor() call failed"); |
| msg("Monitor info:"); |
| for (int i = 0; i < monitorCount; i++) { |
| System.out.println(i + ": cls=" + (ownedMonitors[i] != null ? ownedMonitors[i].getClass() : null)); |
| } |
| Asserts.assertEQ(monitorCount, expectedMonitorCount, "unexpected monitor count returned by getOwnedMonitorsFor()"); |
| Asserts.assertNotNull(ownedMonitors[0]); |
| Asserts.assertSame(ownedMonitors[0].getClass(), LockCls.class); |
| } finally { |
| terminateEndlessLoop(); |
| t1.join(); |
| } |
| } |
| |
| public void dontinline_testMethod() { |
| LockCls l1 = new LockCls(); // to be scalar replaced |
| synchronized (l1) { |
| inlinedTestMethodWithNestedLocking(l1); |
| } |
| } |
| |
| public void inlinedTestMethodWithNestedLocking(LockCls l1) { |
| synchronized (l1) { // nested |
| dontinline_endlessLoop(); |
| } |
| } |
| } |
| |
| /** |
| * Similar to {@link TestCase_1}. Additionally the target thread T has got eliminated locking |
| * for a synchronized method of a different type {@linkplain LockCls2}. |
| */ |
| public static class TestCase_2 extends TestCaseBase { |
| |
| public void runTest() throws Exception { |
| loopCount = 1L << 62; // endless loop |
| Thread t1 = new Thread(() -> dontinline_testMethod(), "Target Thread"); |
| t1.start(); |
| try { |
| waitUntilTargetThreadHasEnteredEndlessLoop(); |
| int expectedMonitorCount = 2; |
| int resultSize = expectedMonitorCount + 3; |
| Object[] ownedMonitors = new Object[resultSize]; |
| msg("Get monitor info"); |
| int monitorCount = getOwnedMonitorInfo(t1, ownedMonitors); |
| terminateEndlessLoop(); |
| t1.join(); |
| Asserts.assertGreaterThanOrEqual(monitorCount, 0, "getOwnedMonitorsFor() call failed"); |
| msg("Monitor info:"); |
| for (int i = 0; i < monitorCount; i++) { |
| System.out.println(i + ": cls=" + (ownedMonitors[i] != null ? ownedMonitors[i].getClass() : null)); |
| } |
| Asserts.assertEQ(monitorCount, expectedMonitorCount, "unexpected monitor count returned by getOwnedMonitorsFor()"); |
| Asserts.assertNotNull(ownedMonitors[0]); |
| Asserts.assertSame(ownedMonitors[0].getClass(), LockCls2.class); |
| |
| Asserts.assertNotNull(ownedMonitors[1]); |
| Asserts.assertSame(ownedMonitors[1].getClass(), LockCls.class); |
| } finally { |
| terminateEndlessLoop(); |
| t1.join(); |
| } |
| } |
| |
| public void dontinline_testMethod() { |
| LockCls l1 = new LockCls(); |
| synchronized (l1) { |
| inlinedTestMethodWithNestedLocking(l1); |
| } |
| } |
| |
| public void inlinedTestMethodWithNestedLocking(LockCls l1) { |
| synchronized (l1) { |
| dontinline_testMethod2(); |
| } |
| } |
| |
| public void dontinline_testMethod2() { |
| // Call synchronized method. Receiver of the call will be scalar replaced, |
| // and locking will be eliminated. Here we use a different type. |
| new LockCls2().inline_synchronized_testMethod(this); |
| } |
| } |
| |
| public static class LockCls { |
| } |
| |
| public static class LockCls2 { |
| public synchronized void inline_synchronized_testMethod(TestCaseBase testCase) { |
| testCase.dontinline_endlessLoop(); |
| } |
| } |
| } |
