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/*
* Copyright (c) 2021, 2023, 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 8262271
* @requires vm.hasSA
* @library /test/lib
* @run main/timeout=240 JStackStressTest
*/
import java.io.IOException;
import java.io.OutputStream;
import jdk.test.lib.JDKToolLauncher;
import jdk.test.lib.JDKToolFinder;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.SA.SATestUtils;
import jdk.test.lib.Utils;
public class JStackStressTest {
static Process jShellProcess;
public static void testjstack() throws IOException {
launchJshell();
long jShellPID = jShellProcess.pid();
OutputAnalyzer jshellOutput = new OutputAnalyzer(jShellProcess);
try {
// Do 4 jstacks on the jshell process as it starts up
for (int i = 1; i <= 4; i++) {
JDKToolLauncher launcher = JDKToolLauncher.createUsingTestJDK("jhsdb");
launcher.addVMArgs(Utils.getTestJavaOpts());
launcher.addToolArg("jstack");
launcher.addToolArg("--pid=" + Long.toString(jShellPID));
System.out.println("###### Starting jstack iteration " + i + " against " + jShellPID);
long startTime = System.currentTimeMillis();
ProcessBuilder processBuilder = SATestUtils.createProcessBuilder(launcher);
OutputAnalyzer output = ProcessTools.executeProcess(processBuilder);
System.out.println("jhsdb jstack stdout:");
System.out.println(output.getStdout());
System.out.println("jhsdb jstack stderr:");
System.out.println(output.getStderr());
long elapsedTime = System.currentTimeMillis() - startTime;
System.out.println("###### End of all output for iteration " + i +
" which took " + elapsedTime + "ms");
output.shouldHaveExitValue(0);
// This will detect most SA failures, including during the attach.
output.shouldNotMatch("^sun.jvm.hotspot.debugger.DebuggerException:.*$");
// This will detect unexpected exceptions, like NPEs and asserts, that are caught
// by sun.jvm.hotspot.tools.Tool.execute().
output.shouldNotMatch("^Error: .*$");
}
} catch (Exception ex) {
throw new RuntimeException("Test ERROR " + ex, ex);
} finally {
try (OutputStream out = jShellProcess.getOutputStream()) {
out.write("/exit\n".getBytes());
out.flush();
}
try {
jShellProcess.waitFor(); // jshell should exit quickly
} catch (InterruptedException e) {
}
System.out.println("jshell Output: " + jshellOutput.getOutput());
}
}
public static void launchJshell() throws IOException {
System.out.println("Starting Jshell");
long startTime = System.currentTimeMillis();
try {
JDKToolLauncher launcher = JDKToolLauncher.createUsingTestJDK("jshell");
launcher.addVMArgs(Utils.getTestJavaOpts());
ProcessBuilder pb = new ProcessBuilder(launcher.getCommand());
jShellProcess = ProcessTools.startProcess("JShell", pb);
} catch (Exception ex) {
throw new RuntimeException("Test ERROR " + ex, ex);
}
}
public static void main(String[] args) throws Exception {
SATestUtils.skipIfCannotAttach(); // throws SkippedException if attach not expected to work.
testjstack();
// The test throws RuntimeException on error.
// IOException is thrown if Jshell can't start because of some bad
// environment condition
System.out.println("Test PASSED");
}
}
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