private void commandKill(StringTokenizer t) throws NoSessionException {
// ### Should change the way in which thread ids and threadgroup names
// ### are distinguished.
if (!t.hasMoreTokens()) {
env.error("Usage: kill <threadgroup name> or <thread id>");
return;
}
while (t.hasMoreTokens()) {
String idToken = t.nextToken();
ThreadReference thread = findThread(idToken);
if (thread != null) {
runtime.stopThread(thread);
env.notice("Thread " + thread.name() + " killed.");
return;
} else {
/* Check for threadgroup name, NOT skipping "system". */
// ### Should skip "system"? Classic 'jdb' does this.
// ### Should deal with possible non-uniqueness of threadgroup names.
ThreadGroupIterator itg = allThreadGroups();
while (itg.hasNext()) {
ThreadGroupReference tg = itg.nextThreadGroup();
if (tg.name().equals(idToken)) {
ThreadIterator it = new ThreadIterator(tg);
while (it.hasNext()) {
runtime.stopThread(it.nextThread());
}
env.notice("Threadgroup " + tg.name() + "killed.");
return;
}
}
env.failure("\"" + idToken + "\" is not a valid threadgroup or id.");
}
}
}
private void commandClear(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
// Print set breakpoints
listEventRequests();
return;
}
// ### need 'clear all'
BreakpointSpec bpSpec = parseBreakpointSpec(t.nextToken());
if (bpSpec != null) {
List<EventRequestSpec> specs = runtime.eventRequestSpecs();
if (specs.isEmpty()) {
env.notice("No breakpoints set.");
} else {
List<EventRequestSpec> toDelete = new ArrayList<EventRequestSpec>();
for (EventRequestSpec spec : specs) {
if (spec.equals(bpSpec)) {
toDelete.add(spec);
}
}
// The request used for matching should be found
if (toDelete.size() <= 1) {
env.notice("No matching breakpoint set.");
}
for (EventRequestSpec spec : toDelete) {
runtime.delete(spec);
}
}
} else {
env.error("Ill-formed breakpoint specification.");
}
}
private void commandStop(StringTokenizer t) throws NoSessionException {
String token;
if (!t.hasMoreTokens()) {
listEventRequests();
} else {
token = t.nextToken();
// Ignore optional "at" or "in" token.
// Allowed for backward compatibility.
if (token.equals("at") || token.equals("in")) {
if (t.hasMoreTokens()) {
token = t.nextToken();
} else {
env.error("Missing breakpoint specification.");
return;
}
}
BreakpointSpec bpSpec = parseBreakpointSpec(token);
if (bpSpec != null) {
// ### Add sanity-checks for deferred breakpoint.
runtime.install(bpSpec);
} else {
env.error("Ill-formed breakpoint specification.");
}
}
}
private void commandStep(StringTokenizer t) throws NoSessionException {
ThreadReference current = context.getCurrentThread();
if (current == null) {
env.failure("No current thread.");
return;
}
try {
if (t.hasMoreTokens() && t.nextToken().toLowerCase().equals("up")) {
runtime.stepOut(current);
} else {
runtime.stepIntoLine(current);
}
} catch (AbsentInformationException e) {
env.failure(
"No linenumber information available -- " + "Try \"stepi\" to step by instructions.");
}
}
private void commandNexti() throws NoSessionException {
ThreadReference current = context.getCurrentThread();
if (current == null) {
env.failure("No current thread.");
return;
}
runtime.stepOverInstruction(current);
}
private ReferenceType findClass(String pattern) throws NoSessionException {
List<ReferenceType> results = runtime.findClassesMatchingPattern(pattern);
if (results.size() > 0) {
// ### Should handle multiple results sensibly.
return results.get(0);
}
return null;
}
private void commandClasses() throws NoSessionException {
OutputSink out = env.getOutputSink();
// out.println("** classes list **");
for (ReferenceType refType : runtime.allClasses()) {
out.println(refType.name());
}
out.show();
}
private void commandCont() throws NoSessionException {
try {
runtime.go();
} catch (VMNotInterruptedException e) {
// ### failure?
env.notice("Target VM is already running.");
}
}
private boolean doLoad(boolean suspended, StringTokenizer t) throws NoSessionException {
String clname;
if (!t.hasMoreTokens()) {
clname = context.getMainClassName();
if (!clname.equals("")) {
// Run from prevously-set class name.
try {
String vmArgs = context.getVmArguments();
runtime.run(suspended, vmArgs, clname, context.getProgramArguments());
return true;
} catch (VMLaunchFailureException e) {
env.failure("Attempt to launch main class \"" + clname + "\" failed.");
}
} else {
env.failure("No main class specifed and no current default defined.");
}
} else {
clname = t.nextToken();
StringBuffer sbuf = new StringBuffer();
// Allow VM arguments to be specified here?
while (t.hasMoreTokens()) {
String tok = t.nextToken();
sbuf.append(tok);
if (t.hasMoreTokens()) {
sbuf.append(' ');
}
}
String args = sbuf.toString();
try {
String vmArgs = context.getVmArguments();
runtime.run(suspended, vmArgs, clname, args);
context.setMainClassName(clname);
// context.setVmArguments(vmArgs);
context.setProgramArguments(args);
return true;
} catch (VMLaunchFailureException e) {
env.failure("Attempt to launch main class \"" + clname + "\" failed.");
}
}
return false;
}
private void commandNext() throws NoSessionException {
ThreadReference current = context.getCurrentThread();
if (current == null) {
env.failure("No current thread.");
return;
}
try {
runtime.stepOverLine(current);
} catch (AbsentInformationException e) {
env.failure(
"No linenumber information available -- " + "Try \"nexti\" to step by instructions.");
}
}
private void commandAttach(StringTokenizer t) {
String portName;
if (!t.hasMoreTokens()) {
portName = context.getRemotePort();
if (!portName.equals("")) {
try {
runtime.attach(portName);
} catch (VMLaunchFailureException e) {
env.failure("Attempt to attach to port \"" + portName + "\" failed.");
}
} else {
env.failure("No port specifed and no current default defined.");
}
} else {
portName = t.nextToken();
try {
runtime.attach(portName);
} catch (VMLaunchFailureException e) {
env.failure("Attempt to attach to port \"" + portName + "\" failed.");
}
context.setRemotePort(portName);
}
}
private void listEventRequests() throws NoSessionException {
// Print set breakpoints
List<EventRequestSpec> specs = runtime.eventRequestSpecs();
if (specs.isEmpty()) {
env.notice("No breakpoints/watchpoints/exceptions set.");
} else {
OutputSink out = env.getOutputSink();
out.println("Current breakpoints/watchpoints/exceptions set:");
for (EventRequestSpec bp : specs) {
out.println("\t" + bp);
}
out.show();
}
}
private void commandPrint(StringTokenizer t, boolean dumpObject) throws NoSessionException {
if (!t.hasMoreTokens()) {
// ### Probably confused if expresion contains whitespace.
env.error("No expression specified.");
return;
}
ThreadReference current = context.getCurrentThread();
if (current == null) {
env.failure("No default thread specified: " + "use the \"thread\" command first.");
return;
}
StackFrame frame;
try {
frame = context.getCurrentFrame(current);
if (frame == null) {
env.failure("Thread has not yet created any stack frames.");
return;
}
} catch (VMNotInterruptedException e) {
env.failure("Target VM must be in interrupted state.");
return;
}
while (t.hasMoreTokens()) {
String expr = t.nextToken("");
Value val = null;
try {
val = runtime.evaluate(frame, expr);
} catch (Exception e) {
env.error("Exception: " + e);
// ### Fix this!
}
if (val == null) {
return; // Error message already printed
}
OutputSink out = env.getOutputSink();
if (dumpObject && (val instanceof ObjectReference) && !(val instanceof StringReference)) {
ObjectReference obj = (ObjectReference) val;
ReferenceType refType = obj.referenceType();
out.println(expr + " = " + val.toString() + " {");
dump(out, obj, refType, refType);
out.println("}");
} else {
out.println(expr + " = " + val.toString());
}
out.show();
}
}
private void commandResume(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
// Suspend all threads in the current thread group.
// ### Issue: help message says default is all threads.
// ### Behavior here agrees with 'jdb', however.
ThreadIterator ti = currentThreadGroupThreads();
while (ti.hasNext()) {
// TODO - don't suspend debugger threads
ti.nextThread().resume();
}
env.notice("All threads resumed.");
} else {
while (t.hasMoreTokens()) {
ThreadReference thread = findThread(t.nextToken());
if (thread != null) {
// thread.resume();
runtime.resumeThread(thread);
}
}
}
}
private void commandInterrupt(StringTokenizer t) throws NoSessionException {
runtime.interrupt();
}
private ThreadGroupIterator allThreadGroups() throws NoSessionException {
threads = null;
return new ThreadGroupIterator(runtime.topLevelThreadGroups());
}
private BreakpointSpec parseBreakpointSpec(String bptSpec) {
StringTokenizer t = new StringTokenizer(bptSpec);
BreakpointSpec bpSpec = null;
// try {
String token = t.nextToken("@:( \t\n\r");
// We can't use hasMoreTokens here because it will cause any leading
// paren to be lost.
String rest;
try {
rest = t.nextToken("").trim();
} catch (NoSuchElementException e) {
rest = null;
}
if ((rest != null) && rest.startsWith("@")) {
t = new StringTokenizer(rest.substring(1));
String sourceName = token;
String lineToken = t.nextToken();
int lineNumber = Integer.valueOf(lineToken).intValue();
if (t.hasMoreTokens()) {
return null;
}
bpSpec = runtime.createSourceLineBreakpoint(sourceName, lineNumber);
} else if ((rest != null) && rest.startsWith(":")) {
t = new StringTokenizer(rest.substring(1));
String classId = token;
String lineToken = t.nextToken();
int lineNumber = Integer.valueOf(lineToken).intValue();
if (t.hasMoreTokens()) {
return null;
}
bpSpec = runtime.createClassLineBreakpoint(classId, lineNumber);
} else {
// Try stripping method from class.method token.
int idot = token.lastIndexOf(".");
if ((idot <= 0) || /* No dot or dot in first char */ (idot >= token.length() - 1)) {
/* dot in last char */
return null;
}
String methodName = token.substring(idot + 1);
String classId = token.substring(0, idot);
List<String> argumentList = null;
if (rest != null) {
if (!rest.startsWith("(") || !rest.endsWith(")")) {
// ### Should throw exception with error message
// out.println("Invalid method specification: "
// + methodName + rest);
return null;
}
// Trim the parens
// ### What about spaces in arglist?
rest = rest.substring(1, rest.length() - 1);
argumentList = new ArrayList<String>();
t = new StringTokenizer(rest, ",");
while (t.hasMoreTokens()) {
argumentList.add(t.nextToken());
}
}
bpSpec = runtime.createMethodBreakpoint(classId, methodName, argumentList);
}
// } catch (Exception e) {
// env.error("Exception attempting to create breakpoint: " + e);
// return null;
// }
return bpSpec;
}
public void executeCommand(String command) {
// ### Treatment of 'out' here is dirty...
out = env.getOutputSink();
if (echo) {
out.println(">>> " + command);
}
StringTokenizer t = new StringTokenizer(command);
try {
String cmd;
if (t.hasMoreTokens()) {
cmd = t.nextToken().toLowerCase();
lastCommand = cmd;
} else {
cmd = lastCommand;
}
if (cmd.equals("print")) {
commandPrint(t, false);
} else if (cmd.equals("eval")) {
commandPrint(t, false);
} else if (cmd.equals("dump")) {
commandPrint(t, true);
} else if (cmd.equals("locals")) {
commandLocals();
} else if (cmd.equals("classes")) {
commandClasses();
} else if (cmd.equals("methods")) {
commandMethods(t);
} else if (cmd.equals("threads")) {
commandThreads(t);
} else if (cmd.equals("thread")) {
commandThread(t);
} else if (cmd.equals("suspend")) {
commandSuspend(t);
} else if (cmd.equals("resume")) {
commandResume(t);
} else if (cmd.equals("cont")) {
commandCont();
} else if (cmd.equals("threadgroups")) {
commandThreadGroups();
} else if (cmd.equals("threadgroup")) {
commandThreadGroup(t);
} else if (cmd.equals("run")) {
commandRun(t);
} else if (cmd.equals("load")) {
commandLoad(t);
} else if (cmd.equals("connect")) {
commandConnect(t);
} else if (cmd.equals("attach")) {
commandAttach(t);
} else if (cmd.equals("detach")) {
commandDetach(t);
} else if (cmd.equals("interrupt")) {
commandInterrupt(t);
// ### Not implemented.
// } else if (cmd.equals("catch")) {
// commandCatchException(t);
// ### Not implemented.
// } else if (cmd.equals("ignore")) {
// commandIgnoreException(t);
} else if (cmd.equals("step")) {
commandStep(t);
} else if (cmd.equals("stepi")) {
commandStepi();
} else if (cmd.equals("next")) {
commandNext();
} else if (cmd.equals("nexti")) {
commandNexti();
} else if (cmd.equals("kill")) {
commandKill(t);
} else if (cmd.equals("where")) {
commandWhere(t, false);
} else if (cmd.equals("wherei")) {
commandWhere(t, true);
} else if (cmd.equals("up")) {
commandUp(t);
} else if (cmd.equals("down")) {
commandDown(t);
} else if (cmd.equals("frame")) {
commandFrame(t);
} else if (cmd.equals("stop")) {
commandStop(t);
} else if (cmd.equals("clear")) {
commandClear(t);
} else if (cmd.equals("list")) {
commandList(t);
} else if (cmd.equals("use")) {
commandUse(t);
} else if (cmd.equals("sourcepath")) {
commandSourcepath(t);
} else if (cmd.equals("classpath")) {
commandClasspath(t);
} else if (cmd.equals("monitor")) {
commandMonitor(t);
} else if (cmd.equals("unmonitor")) {
commandUnmonitor(t);
} else if (cmd.equals("view")) {
commandView(t);
// } else if (cmd.equals("read")) {
// readCommand(t);
} else if (cmd.equals("help") || cmd.equals("?")) {
help();
} else if (cmd.equals("quit") || cmd.equals("exit")) {
try {
runtime.detach();
} catch (NoSessionException e) {
// ignore
}
env.terminate();
} else {
// ### Dubious repeat-count feature inherited from 'jdb'
if (t.hasMoreTokens()) {
try {
int repeat = Integer.parseInt(cmd);
String subcom = t.nextToken("");
while (repeat-- > 0) {
executeCommand(subcom);
}
return;
} catch (NumberFormatException exc) {
}
}
out.println("huh? Try help...");
out.flush();
}
} catch (NoSessionException e) {
out.println("There is no currently attached VM session.");
out.flush();
} catch (Exception e) {
out.println("Internal exception: " + e.toString());
out.flush();
System.out.println("JDB internal exception: " + e.toString());
e.printStackTrace();
}
out.show();
}
private ThreadGroupReference getDefaultThreadGroup() throws NoSessionException {
if (defaultThreadGroup == null) {
defaultThreadGroup = runtime.systemThreadGroup();
}
return defaultThreadGroup;
}
private void commandDetach(StringTokenizer t) throws NoSessionException {
runtime.detach();
}
private ThreadIterator allThreads() throws NoSessionException {
threads = null;
// ### Why not use runtime.allThreads().iterator() ?
return new ThreadIterator(runtime.topLevelThreadGroups());
}