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/*
* Copyright (c) 2014, 2019, 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 RTMTotalCountIncrRate option affects
* RTM locking statistics.
* @library /test/lib /
* @modules java.base/jdk.internal.misc
* java.management
* @requires vm.rtm.cpu & vm.rtm.compiler
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm/native -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI
* compiler.rtm.locking.TestRTMTotalCountIncrRate
*/
package compiler.rtm.locking;
import compiler.testlibrary.rtm.AbortProvoker;
import compiler.testlibrary.rtm.XAbortProvoker;
import compiler.testlibrary.rtm.CompilableTest;
import compiler.testlibrary.rtm.RTMLockingStatistics;
import compiler.testlibrary.rtm.RTMTestBase;
import jdk.test.lib.Asserts;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.cli.CommandLineOptionTest;
import java.util.List;
/**
* Test verifies that with RTMTotalCountIncrRate=1 RTM locking statistics
* contains precise information abort attempted locks and that with other values
* statistics contains information abort non-zero locking attempts.
* Since assert done for RTMTotalCountIncrRate=1 is pretty strict, test uses
* -XX:RTMRetryCount=0 to avoid issue with retriable aborts. For more details on
* that issue see {@link TestUseRTMAfterLockInflation}.
*/
public class TestRTMTotalCountIncrRate {
protected void runTestCases() throws Throwable {
verifyLocksCount(1, false);
verifyLocksCount(64, false);
verifyLocksCount(128, false);
verifyLocksCount(1, true);
verifyLocksCount(64, true);
verifyLocksCount(128, true);
}
private void verifyLocksCount(int incrRate, boolean useStackLock)
throws Throwable{
CompilableTest test = new Test();
OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
test,
CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
useStackLock),
CommandLineOptionTest.prepareNumericFlag(
"RTMTotalCountIncrRate", incrRate),
"-XX:RTMRetryCount=0",
"-XX:+PrintPreciseRTMLockingStatistics",
Test.class.getName(),
Boolean.toString(!useStackLock)
);
outputAnalyzer.shouldHaveExitValue(0);
List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
test.getMethodWithLockName(), outputAnalyzer.getOutput());
Asserts.assertEQ(statistics.size(), 1, "VM output should contain "
+ "exactly one RTM locking statistics entry for method "
+ test.getMethodWithLockName());
RTMLockingStatistics lock = statistics.get(0);
if (incrRate == 1) {
Asserts.assertEQ(lock.getTotalLocks(), Test.TOTAL_ITERATIONS,
"Total locks should be exactly the same as amount of "
+ "iterations.");
}
}
public static class Test implements CompilableTest {
private static final long TOTAL_ITERATIONS = 10000L;
private final XAbortProvoker xabort = new XAbortProvoker();
private final Object monitor = new Object();
// Following field have to be static in order to avoid escape analysis.
@SuppressWarnings("UnsuedDeclaration")
private static int field = 0;
@Override
public String getMethodWithLockName() {
return this.getClass().getName() + "::lock";
}
@Override
public String[] getMethodsToCompileNames() {
return new String[] { getMethodWithLockName(), "*.doAbort" };
}
public void lock(boolean forceAbort) {
synchronized(monitor) {
if (forceAbort) {
// We're calling native method in order to force
// abort. It's done by explicit xabort call emitted
// in SharedRuntime::generate_native_wrapper.
// If an actual JNI call will be replaced by
// intrinsic - we'll be in trouble, since xabort
// will be no longer called and test may fail.
xabort.doAbort();
}
Test.field++;
}
}
/**
* Usage:
* Test <inflate monitor>
*/
public static void main(String args[]) throws Throwable {
Asserts.assertGTE(args.length, 1, "One argument required.");
Test test = new Test();
boolean shouldBeInflated = Boolean.valueOf(args[0]);
if (shouldBeInflated) {
AbortProvoker.inflateMonitor(test.monitor);
}
for (long i = 0L; i < Test.TOTAL_ITERATIONS; i++) {
AbortProvoker.verifyMonitorState(test.monitor,
shouldBeInflated);
// Force abort on first iteration to avoid rare case when
// there were no aborts and locks count was not incremented
// with RTMTotalCountIncrRate > 1 (in such case JVM won't
// print JVM locking statistics).
test.lock(i == 0);
}
}
}
public static void main(String args[]) throws Throwable {
new TestRTMTotalCountIncrRate().runTestCases();
}
}
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