/*
* Copyright ( c ) 1999 , 2018 , 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 .
*/
/*
* Note : What seems to be an excessive use of System . xxx . flush ( ) ;
* is actually necessary to combat lost output on win32 systems .
*
* @ test
* @ bug 4291701 4376819 4422312 4522770
* @ summary Test JIT debugging -
* assure that launching on uncaught exception works
*
* @ library / test / lib
*
* @ author Robert Field
* @ run main / othervm JITDebug
*/
import com.sun.jdi.*;
import com.sun.jdi.connect.*;
import jdk.test.lib.JDKToolFinder;
import jdk.test.lib.Utils;
import jdk.test.lib.process.ProcessTools;
import java.util.*;
/*
* This class implements three separate small programs , each
* of which ( directly or indirectly ) invokes the next . These
* programs are :
* test launcher -
* Runs the debug target . It exists to work around a
* bug in the test tools which do not allow quoted spaces
* in command lines . It launchs the debug target in
* such a way that when it encounters an uncaught exception
* it ( in turn ) will launch the trivial debugger .
* debug target -
* A one line program which throws an uncaught exception .
* trivial debugger -
* A debugger which attachs to the debug target and shuts
* it down with a zero exit code .
* These programs are differentiated by their command line arguments :
* test launcher - ( no args )
* debug target - ( " TARGET " )
* trivial debugger - ( " DEBUGGER " , host and port )
*/
public class JITDebug {
public static void main(String[] args) {
if (!new JITDebug().parseArgs(args)) {
throw new RuntimeException("Unexpected command line arguments: "
+ args);
}
}
boolean parseArgs(String[] args) {
switch (args.length) {
case 0 :
testLaunch();
return true ;
case 1 :
if (args[0 ].equals("TARGET" )) {
debugTarget();
return true ;
} else {
return false ;
}
case 3 :
if (args[0 ].equals("DEBUGGER" )) {
// launched by using "-agentlib:" "launch" sub-option:
// The following strings are appended to the string given in this argument (space-delimited).
// They can aid the launched debugger in establishing a connection with this VM.
// The resulting string is executed.
// - The value of the transport sub-option.
// - The value of the address sub-option (or the generated address if one is not given)
trivialDebugger(args[1 ], args[2 ]);
return true ;
} else {
return false ;
}
default :
return false ;
}
}
void testLaunch() {
ProcessBuilder pb = ProcessTools.createTestJvm();
List largs = pb.command();
largs.add("-classpath" );
largs.add(Utils.TEST_CLASSES);
String javaExe = JDKToolFinder.getJDKTool("java" );
largs.add("-agentlib:jdwp=transport=dt_socket,server=y,onuncaught=y," +
"launch=" + javaExe + " " + this .getClass().getName() + " DEBUGGER " );
largs.add(this .getClass().getName());
largs.add("TARGET" );
try {
ProcessTools.executeCommand(pb)
.shouldHaveExitValue(0 );
} catch (Throwable exc) {
throw new RuntimeException("Unexpected exception: " + exc);
}
System.out.println("JIT Debugging test PASSED" );
}
// Target VM code
void debugTarget() {
System.out.flush();
System.out.println("trigger onuncaught launch" );
System.out.flush();
throw new RuntimeException("Start-up onuncaught handling" );
}
void trivialDebugger(String transportMethod, String transportAddress) {
System.out.println("trivial debugger started" );
String connectorName = null ;
if ("dt_shmem" .equals(transportMethod)) {
connectorName = "com.sun.jdi.SharedMemoryAttach" ;
} else if ("dt_socket" .equals(transportMethod)) {
connectorName = "com.sun.jdi.SocketAttach" ;
} else {
System.err.flush();
System.err.println("Unknown transportMethod: " + transportMethod + " - hanging" );
System.err.flush();
hang();
}
List conns = Bootstrap.virtualMachineManager().attachingConnectors();
for (Iterator it = conns.iterator(); it.hasNext(); ) {
AttachingConnector conn = (AttachingConnector)it.next();
if (conn.name().equals(connectorName)) {
doAttach(connectorName, conn, transportAddress);
return ;
}
}
System.err.flush();
System.err.println("No attaching connector matching: " + connectorName + " - hanging" );
System.err.flush();
hang();
}
void doAttach(String connectorName, AttachingConnector conn, String transportAddress) {
Map<String, Connector.Argument> connArgs = conn.defaultArguments();
if ("com.sun.jdi.SharedMemoryAttach" .equals(connectorName)) {
Connector.Argument portArg = (Connector.Argument)connArgs.get("name" );
portArg.setValue(transportAddress);
} else {
Connector.Argument portArg = (Connector.Argument)connArgs.get("port" );
portArg.setValue(transportAddress);
}
try {
VirtualMachine vm = conn.attach(connArgs);
System.out.println("attached to: " + transportAddress);
vm.exit(0 ); // we are happy - terminate VM with no error
System.out.println("we are happy - terminated VM with no error" );
} catch (Exception exc) {
System.err.flush();
System.err.println("Exception: " + exc + " - hanging" );
System.err.flush();
hang();
}
}
/** Hang so that test fails */
void hang() {
try {
// ten minute nap
Thread .sleep(10 * 60 * 1000 );
} catch (InterruptedException exc) {
// shouldn't happen
}
}
}
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