private void usage() {
System.out.println("usage: java " + getClass().getName() + " <pid> [server id]");
System.out.println(" or: java " + getClass().getName() + " <executable> <core> [server id]");
System.out.println("\"pid\" must be the process ID of a HotSpot process.");
System.out.println("If reading a core file, \"executable\" must (currently) be the");
System.out.println("full path name to the precise java executable which generated");
System.out.println("the core file (not, on Solaris, the \"java\" wrapper script in");
System.out.println("the \"bin\" subdirectory of the JDK.)");
System.out.println("The \"server id\" is a unique name for a specific remote debuggee.");
System.exit(1);
}
private void run(String[] args) {
if ((args.length < 1) || (args.length > 3)) {
usage();
}
// Attempt to handle "-h" or "-help"
if (args[0].startsWith("-")) {
usage();
}
int pid = 0;
boolean usePid = false;
String coreFileName = null;
// FIXME: would be nice to pick this up from the core file
// somehow, but that doesn't look possible. Should at least figure
// it out from a path to the JDK.
String javaExecutableName = null;
String serverID = null;
switch (args.length) {
case 1:
try {
pid = Integer.parseInt(args[0]);
usePid = true;
} catch (NumberFormatException e) {
usage();
}
break;
case 2:
// either we have pid and server id or exec file and core file
try {
pid = Integer.parseInt(args[0]);
usePid = true;
serverID = args[1];
} catch (NumberFormatException e) {
pid = -1;
usePid = false;
javaExecutableName = args[0];
coreFileName = args[1];
}
break;
case 3:
javaExecutableName = args[0];
coreFileName = args[1];
serverID = args[2];
break;
default:
// should not happend, taken care already.
break;
}
final HotSpotAgent agent = new HotSpotAgent();
try {
if (usePid) {
System.err.println(
"Attaching to process ID " + pid + " and starting RMI services, please wait...");
agent.startServer(pid, serverID);
} else {
System.err.println(
"Attaching to core "
+ coreFileName
+ " from executable "
+ javaExecutableName
+ " and starting RMI services, please wait...");
agent.startServer(javaExecutableName, coreFileName, serverID);
}
} catch (DebuggerException e) {
if (usePid) {
System.err.print("Error attaching to process or starting server: ");
} else {
System.err.print("Error attaching to core file or starting server: ");
}
e.printStackTrace();
System.exit(1);
}
// shutdown hook to clean-up the server in case of forced exit.
Runtime.getRuntime()
.addShutdownHook(
new java.lang.Thread(
new Runnable() {
public void run() {
agent.shutdownServer();
}
}));
System.err.println("Debugger attached and RMI services started.");
}