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."); }