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/*
* Copyright (c) 2024, 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.
*/
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import jdk.test.lib.dcmd.PidJcmdExecutor;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import com.sun.jdi.Bootstrap;
import com.sun.jdi.ClassType;
import com.sun.jdi.VirtualMachine;
import com.sun.jdi.VMDisconnectedException;
import com.sun.jdi.connect.AttachingConnector;
import com.sun.jdi.connect.Connector;
import com.sun.jdi.connect.IllegalConnectorArgumentsException;
import com.sun.jdi.event.ClassPrepareEvent;
import com.sun.jdi.event.Event;
import com.sun.jdi.event.EventSet;
import com.sun.jdi.request.EventRequest;
import com.sun.jdi.request.ClassPrepareRequest;
/**
* @test
* @bug 8332488
* @summary Unit test for testing debug agent support for JVMTI.data_dump jcmd.
*
* @library /test/lib
* @modules jdk.jdi
* @run driver DataDumpTest
*/
class DataDumpTestTarg {
public static void main(String args[]) throws Exception {
// Write something that can be read by the driver
System.out.println("Debuggee started");
}
}
public class DataDumpTest {
public static void main(String[] args) throws Exception {
System.out.println("Test 1: Debuggee start with datadump=y");
runTest("-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,datadump=y");
}
private static void sleep(long ms) {
try {
Thread.sleep(ms);
} catch (InterruptedException e) {
}
}
private static void runTest(String jdwpArg) throws Exception {
ProcessBuilder pb = ProcessTools.createTestJavaProcessBuilder(
jdwpArg,
// Probably not required by this test, but best to include when using datadump
"-XX:+StartAttachListener",
"DataDumpTestTarg");
Process p = null;
OutputAnalyzer out = null;
try {
p = pb.start();
InputStream is = p.getInputStream();
// Read the first character of output to make sure we've waited until the
// debuggee is ready. This will be the debug agent's "Listening..." message.
char firstChar = (char)is.read();
out = new OutputAnalyzer(p);
// Attach a debugger and do the data dump. The data dump output will appear
// in the debuggee output.
attachAndDump(p.pid());
out.waitFor(); // Wait for the debuggee to exit
System.out.println("Debuggee output:");
System.out.println(firstChar + out.getOutput());
// All these strings are part of the debug agent data dump output.
out.shouldHaveExitValue(0);
out.shouldContain("Debuggee started");
out.shouldContain("Debug Agent Data Dump");
out.shouldContain("suspendAllCount: 0");
out.shouldContain("ClassMatch: classPattern(DataDumpTestTarg)");
out.shouldContain("Handlers for EI_VM_DEATH");
} finally {
if (p != null) {
p.destroyForcibly();
}
}
}
private static void attachAndDump(long pid) throws IOException,
IllegalConnectorArgumentsException {
// Get the ProcessAttachingConnector, which can attach using the pid of the debuggee.
AttachingConnector ac = Bootstrap.virtualMachineManager().attachingConnectors()
.stream()
.filter(c -> c.name().equals("com.sun.jdi.ProcessAttach"))
.findFirst()
.orElseThrow(() -> new RuntimeException("Unable to locate ProcessAttachingConnector"));
// Set the connector's "pid" argument to the pid of the debuggee.
Map<String, Connector.Argument> args = ac.defaultArguments();
Connector.StringArgument arg = (Connector.StringArgument)args.get("pid");
arg.setValue("" + pid);
// Attach to the debuggee.
System.out.println("Debugger is attaching to: " + pid + " ...");
VirtualMachine vm = ac.attach(args);
// List all threads as a sanity check.
System.out.println("Attached! Now listing threads ...");
vm.allThreads().stream().forEach(System.out::println);
// Request VM to trigger ClassPrepareRequest when DataDumpTestTarg class is prepared.
ClassPrepareRequest classPrepareRequest = vm.eventRequestManager().createClassPrepareRequest();
classPrepareRequest.addClassFilter("DataDumpTestTarg");
// Don't use SUSPEND_ALL here. That might prevent the data dump because the
// Signal Dispatcher and Attach Listener threads will be suspended, and they
// may be needed by the jcmd support.
classPrepareRequest.setSuspendPolicy(EventRequest.SUSPEND_EVENT_THREAD);
classPrepareRequest.enable();
try {
while (true) { // Exit when we get VMDisconnectedException
EventSet eventSet = vm.eventQueue().remove();
if (eventSet == null) {
continue;
}
for (Event event : eventSet) {
System.out.println("Received event: " + event);
if (event instanceof ClassPrepareEvent) {
ClassPrepareEvent evt = (ClassPrepareEvent) event;
ClassType classType = (ClassType) evt.referenceType();
// Run JVMTI.data_dump jcmd.
OutputAnalyzer out = new PidJcmdExecutor("" + pid).execute("JVMTI.data_dump");
out.waitFor();
// Verify the output of the jcmd. Note the actual dump is in the debuggee
// output, not in the jcmd output, so we don't check it here.
System.out.println("JVMTI.data_dump output:");
System.out.println(out.getOutput());
out.shouldContain("Command executed successfully");
out.shouldHaveExitValue(0);
}
}
eventSet.resume();
}
} catch (VMDisconnectedException e) {
System.out.println("VM is now disconnected.");
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
}
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