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/*
* Copyright (c) 2014, 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
* @bug 8031320
* @summary Verify that if we use RTMDeopt, then deoptimization
* caused by reason other then rtm_state_change will reset
* method's RTM state. And if we don't use RTMDeopt, then
* RTM state remain the same after such deoptimization.
* @library /testlibrary /testlibrary/whitebox /compiler/testlibrary
* @build TestRTMAfterNonRTMDeopt
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI TestRTMAfterNonRTMDeopt
*/
import java.util.List;
import com.oracle.java.testlibrary.*;
import com.oracle.java.testlibrary.cli.CommandLineOptionTest;
import com.oracle.java.testlibrary.cli.predicate.AndPredicate;
import rtm.*;
import rtm.predicate.SupportedCPU;
import rtm.predicate.SupportedVM;
import sun.misc.Unsafe;
/**
* To verify that with +UseRTMDeopt method's RTM state will be
* changed to ProfileRTM on deoptimization unrelated to
* rtm_state_change following sequence of events is used:
* <pre>
*
* rtm state ^
* |
* UseRTM | ******| ******
* | |
* ProfileRTM |******| |*****|
* | | | |
* 0-------|-----|-----|---------------------> time
* | | \ force abort
* | |
* | \ force deoptimization
* |
* \ force xabort
* </pre>
* When xabort is forced by native method call method should
* change it's state to UseRTM, because we use RTMAbortRatio=100
* and low RTMLockingThreshold, so at this point actual abort
* ratio will be below 100% and there should be enough lock
* attempts to recompile method without RTM profiling.
*/
public class TestRTMAfterNonRTMDeopt extends CommandLineOptionTest {
private static final int ABORT_THRESHOLD = 1000;
private static final String RANGE_CHECK = "range_check";
private TestRTMAfterNonRTMDeopt() {
super(new AndPredicate(new SupportedCPU(), new SupportedVM()));
}
@Override
protected void runTestCases() throws Throwable {
verifyRTMAfterDeopt(false, false);
verifyRTMAfterDeopt(true, false);
verifyRTMAfterDeopt(false, true);
verifyRTMAfterDeopt(true, true);
}
private void verifyRTMAfterDeopt(boolean useStackLock,
boolean useRTMDeopt) throws Throwable {
CompilableTest test = new Test();
String logFile = String.format("rtm_%s_stack_lock_%s_deopt.xml",
(useStackLock ? "use" : "no"), (useRTMDeopt ? "use" : "no"));
OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
logFile,
test,
"-XX:CompileThreshold=1",
CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
useStackLock),
CommandLineOptionTest.prepareBooleanFlag("UseRTMDeopt",
useRTMDeopt),
"-XX:RTMAbortRatio=100",
CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold",
TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD),
CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD / 2L),
"-XX:RTMTotalCountIncrRate=1",
"-XX:+PrintPreciseRTMLockingStatistics",
Test.class.getName(),
Boolean.toString(!useStackLock)
);
outputAnalyzer.shouldHaveExitValue(0);
int traps = RTMTestBase.firedRTMStateChangeTraps(logFile);
if (useRTMDeopt) {
Asserts.assertEQ(traps, 2, "Two uncommon traps with "
+ "reason rtm_state_change should be fired.");
} else {
Asserts.assertEQ(traps, 0, "No uncommon traps with "
+ "reason rtm_state_change should be fired.");
}
int rangeCheckTraps = RTMTestBase.firedUncommonTraps(logFile,
TestRTMAfterNonRTMDeopt.RANGE_CHECK);
Asserts.assertEQ(rangeCheckTraps, 1,
"One range_check uncommon trap should be fired.");
List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
test.getMethodWithLockName(), outputAnalyzer.getOutput());
int expectedStatEntries = (useRTMDeopt ? 4 : 2);
Asserts.assertEQ(statistics.size(), expectedStatEntries,
String.format("VM output should contain %d RTM locking "
+ "statistics entries.", expectedStatEntries));
}
public static class Test implements CompilableTest {
// Following field have to be static in order to avoid escape analysis.
@SuppressWarnings("UnsuedDeclaration")
private static int field = 0;
private static final int ITERATIONS = 10000;
private static final int RANGE_CHECK_AT = ITERATIONS / 2;
private static final Unsafe UNSAFE = Utils.getUnsafe();
private final Object monitor = new Object();
@Override
public String getMethodWithLockName() {
return this.getClass().getName() + "::forceAbort";
}
@Override
public String[] getMethodsToCompileNames() {
return new String[] { getMethodWithLockName() };
}
public void forceAbort(int a[], boolean abort) {
try {
synchronized(monitor) {
a[0]++;
if (abort) {
Test.field = Test.UNSAFE.addressSize();
}
}
} catch (Throwable t) {
// suppress any throwables
}
}
/**
* Usage:
* Test <inflate monitor>
*/
public static void main(String args[]) throws Throwable {
Test t = new Test();
boolean shouldBeInflated = Boolean.valueOf(args[0]);
if (shouldBeInflated) {
AbortProvoker.inflateMonitor(t.monitor);
}
int tmp[] = new int[1];
for (int i = 0; i < Test.ITERATIONS; i++ ) {
AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
if (i == Test.RANGE_CHECK_AT) {
t.forceAbort(new int[0], false);
} else {
boolean isThreshold
= (i == TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD);
boolean isThresholdPlusRange
= (i == TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD
+ Test.RANGE_CHECK_AT);
t.forceAbort(tmp, isThreshold || isThresholdPlusRange);
}
}
}
}
public static void main(String args[]) throws Throwable {
new TestRTMAfterNonRTMDeopt().test();
}
}
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