| /* |
| * Copyright (c) 2014, 2016, 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. |
| */ |
| |
| /* |
| * @test DeoptimizeFramesTest |
| * @bug 8028595 |
| * @summary testing of WB::deoptimizeFrames() |
| * @library /test/lib / |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @build sun.hotspot.WhiteBox |
| * @run driver ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions |
| * -XX:+WhiteBoxAPI -Xmixed -XX:-UseCounterDecay |
| * -XX:CompileCommand=compileonly,compiler.whitebox.DeoptimizeFramesTest$TestCaseImpl::method |
| * -XX:+IgnoreUnrecognizedVMOptions -XX:-DeoptimizeRandom -XX:-DeoptimizeALot |
| * compiler.whitebox.DeoptimizeFramesTest true |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions |
| * -XX:+WhiteBoxAPI -Xmixed -XX:-UseCounterDecay |
| * -XX:CompileCommand=compileonly,compiler.whitebox.DeoptimizeFramesTest$TestCaseImpl::method |
| * -XX:+IgnoreUnrecognizedVMOptions -XX:-DeoptimizeRandom -XX:-DeoptimizeALot |
| * compiler.whitebox.DeoptimizeFramesTest false |
| */ |
| |
| package compiler.whitebox; |
| |
| import jdk.test.lib.Asserts; |
| import sun.hotspot.code.NMethod; |
| |
| import java.lang.reflect.Executable; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.Phaser; |
| |
| public class DeoptimizeFramesTest extends CompilerWhiteBoxTest { |
| private final boolean makeNotEntrant; |
| private final Phaser phaser; |
| |
| private DeoptimizeFramesTest(boolean makeNotEntrant, Phaser phaser) { |
| super(new TestCaseImpl(phaser)); |
| // to prevent inlining of #method |
| WHITE_BOX.testSetDontInlineMethod(method, true); |
| this.makeNotEntrant = makeNotEntrant; |
| this.phaser = phaser; |
| System.out.printf("DeoptimizeFramesTest(makeNotEntrant = %b)%n", |
| makeNotEntrant); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| Asserts.assertEQ(args.length, 1, |
| "[TESTBUG] args should contain 1 element"); |
| new DeoptimizeFramesTest(Boolean.valueOf(args[0]), new Phaser()).runTest(); |
| } |
| |
| @Override |
| protected void test() throws Exception { |
| compile(); |
| checkCompiled(); |
| NMethod nm = NMethod.get(method, testCase.isOsr()); |
| |
| WHITE_BOX.deoptimizeFrames(makeNotEntrant); |
| // #method should still be compiled, since it didn't have frames on stack |
| checkCompiled(); |
| NMethod nm2 = NMethod.get(method, testCase.isOsr()); |
| Asserts.assertEQ(nm.compile_id, nm2.compile_id, |
| "should be the same nmethod"); |
| |
| phaser.register(); |
| Thread t = new Thread(() -> compile(1)); |
| t.start(); |
| // pass 1st phase, #method is on stack |
| int p = phaser.arriveAndAwaitAdvance(); |
| WHITE_BOX.deoptimizeFrames(makeNotEntrant); |
| // pass 2nd phase, #method can exit |
| phaser.awaitAdvance(phaser.arriveAndDeregister()); |
| |
| try { |
| t.join(); |
| } catch (InterruptedException e) { |
| throw new Error("method '" + method + "' is still executing", e); |
| } |
| |
| // invoke one more time to recompile not entrant if any |
| compile(1); |
| |
| nm2 = NMethod.get(method, testCase.isOsr()); |
| if (makeNotEntrant) { |
| if (nm2 != null) { |
| Asserts.assertNE(nm.compile_id, nm2.compile_id, |
| String.format("compilation %d can't be available", nm.compile_id)); |
| } |
| } else { |
| Asserts.assertEQ(nm.compile_id, nm2.compile_id, "should be the same nmethod"); |
| } |
| } |
| |
| |
| private static class TestCaseImpl implements TestCase { |
| private static final Executable EXECUTABLE; |
| static { |
| try { |
| EXECUTABLE = TestCaseImpl.class.getDeclaredMethod("method"); |
| } catch (NoSuchMethodException e) { |
| throw new Error("[TESTBUG] method not found", e); |
| } |
| } |
| |
| private final Phaser phaser; |
| |
| public TestCaseImpl(Phaser phaser) { |
| this.phaser = phaser; |
| phaser.register(); |
| } |
| |
| @Override |
| public String name() { |
| return "2phases"; |
| } |
| |
| @Override |
| public Executable getExecutable() { |
| return EXECUTABLE; |
| } |
| |
| @Override |
| public Callable<Integer> getCallable() { |
| return () -> { |
| return method(); |
| }; |
| } |
| |
| @Override |
| public boolean isOsr() { |
| return false; |
| } |
| |
| private int method() { |
| phaser.arriveAndAwaitAdvance(); |
| phaser.arriveAndAwaitAdvance(); |
| return 0; |
| } |
| } |
| } |