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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
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*
* 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 ) .
*
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* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
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import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import jdk.test.lib.apps.LingeredApp;
import jdk.test.lib.apps.LingeredAppWithDeadlock;
import jdk.test.lib.JDKToolLauncher;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.Utils;
import jtreg.SkippedException;
/**
* @ test
* @ summary Test deadlock detection
* @ requires vm . hasSA
* @ library / test / lib
* @ build jdk . test . lib . apps . *
* @ build DeadlockDetectionTest
* @ run main DeadlockDetectionTest
*/
public class DeadlockDetectionTest {
private static LingeredAppWithDeadlock theApp = null ;
private static ProcessBuilder processBuilder = new ProcessBuilder();
private static OutputAnalyzer jstack(String... toolArgs) throws Exception {
JDKToolLauncher launcher = JDKToolLauncher.createUsingTestJDK("jstack" );
launcher.addVMArgs(Utils.getFilteredTestJavaOpts("-XX:+UsePerfData" ));
launcher.addVMArg("-XX:+UsePerfData" );
if (toolArgs != null ) {
for (String toolArg : toolArgs) {
launcher.addToolArg(toolArg);
}
}
processBuilder.command(launcher.getCommand());
System.out.println(processBuilder.command().stream().collect(Collectors.joining(" " )));
OutputAnalyzer output = ProcessTools.executeProcess(processBuilder);
System.out.println(output.getOutput());
return output;
}
public static void main(String[] args) throws Exception {
System.out.println("Starting DeadlockDetectionTest" );
if (!LingeredApp.isLastModifiedWorking()) {
// Exact behaviour of the test depends on operating system and the test nature,
// so just print the warning and continue
System.err.println("Warning! Last modified time doesn't work." );
}
try {
String[] vmArgs = Utils.appendTestJavaOpts("-XX:+UsePerfData" );
theApp = new LingeredAppWithDeadlock();
LingeredApp.startApp(theApp, vmArgs);
OutputAnalyzer output = jstack(Long .toString(theApp.getPid()));
System.out.println(output.getOutput());
if (output.getExitValue() == 3 ) {
throw new SkippedException("Test can't run for some reason" );
} else {
output.shouldHaveExitValue(0 );
output.shouldContain("Found 1 deadlock." );
}
} finally {
LingeredApp.stopApp(theApp);
}
}
}
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(vorverarbeitet am 2026-06-10)
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