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/*
* 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:CompileCommand=dontinline,java.util.concurrent.Phaser::*
* -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.assertNE(nm2, null, "must not be null");
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;
}
}
}
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