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 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 ThreadReference findThread(String idToken) throws NoSessionException {
String id;
ThreadReference thread = null;
if (idToken.startsWith("t@")) {
id = idToken.substring(2);
} else {
id = idToken;
}
try {
ThreadReference[] threads = threads();
long threadID = Long.parseLong(id, 16);
for (ThreadReference thread2 : threads) {
if (thread2.uniqueID() == threadID) {
thread = thread2;
break;
}
}
if (thread == null) {
// env.failure("No thread for id \"" + idToken + "\"");
env.failure("\"" + idToken + "\" is not a valid thread id.");
}
} catch (NumberFormatException e) {
env.error("Thread id \"" + idToken + "\" is ill-formed.");
thread = null;
}
return thread;
}
private void commandMethods(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
env.error("No class specified.");
return;
}
String idClass = t.nextToken();
ReferenceType cls = findClass(idClass);
if (cls != null) {
List<Method> methods = cls.allMethods();
OutputSink out = env.getOutputSink();
for (int i = 0; i < methods.size(); i++) {
Method method = methods.get(i);
out.print(method.declaringType().name() + " " + method.name() + "(");
Iterator<String> it = method.argumentTypeNames().iterator();
if (it.hasNext()) {
while (true) {
out.print(it.next());
if (!it.hasNext()) {
break;
}
out.print(", ");
}
}
out.println(")");
}
out.show();
} else {
// ### Should validate class name syntax.
env.failure("\"" + idClass + "\" is not a valid id or class name.");
}
}
/** Command: unmonitor Unmonitor an expression */
private void commandUnmonitor(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
env.error("Argument required");
} else {
env.getMonitorListModel().remove(t.nextToken(""));
}
}
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.");
}
}
public CommandInterpreter(Environment env, boolean echo) {
this.env = env;
this.echo = echo;
this.runtime = env.getExecutionManager();
this.context = env.getContextManager();
this.classManager = env.getClassManager();
this.sourceManager = env.getSourceManager();
}
private void dumpStack(ThreadReference thread, boolean showPC) {
// ### Check for these.
// env.failure("Thread no longer exists.");
// env.failure("Target VM must be in interrupted state.");
// env.failure("Current thread isn't suspended.");
// ### Should handle extremely long stack traces sensibly for user.
List<StackFrame> stack = null;
try {
stack = thread.frames();
} catch (IncompatibleThreadStateException e) {
env.failure("Thread is not suspended.");
}
// ### Fix this!
// ### Previously mishandled cases where thread was not current.
// ### Now, prints all of the stack regardless of current frame.
int frameIndex = 0;
// int frameIndex = context.getCurrentFrameIndex();
if (stack == null) {
env.failure("Thread is not running (no stack).");
} else {
OutputSink out = env.getOutputSink();
int nFrames = stack.size();
for (int i = frameIndex; i < nFrames; i++) {
StackFrame frame = stack.get(i);
Location loc = frame.location();
Method meth = loc.method();
out.print(" [" + (i + 1) + "] ");
out.print(meth.declaringType().name());
out.print('.');
out.print(meth.name());
out.print(" (");
if (meth.isNative()) {
out.print("native method");
} else if (loc.lineNumber() != -1) {
try {
out.print(loc.sourceName());
} catch (AbsentInformationException e) {
out.print("<unknown>");
}
out.print(':');
out.print(loc.lineNumber());
}
out.print(')');
if (showPC) {
long pc = loc.codeIndex();
if (pc != -1) {
out.print(", pc = " + pc);
}
}
out.println();
}
out.show();
}
}
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 commandThreadGroup(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
env.error("Threadgroup name not specified.");
return;
}
String name = t.nextToken();
ThreadGroupReference tg = findThreadGroup(name);
if (tg == null) {
env.failure(name + " is not a valid threadgroup name.");
} else {
// ### Should notify user.
setDefaultThreadGroup(tg);
}
}
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 commandConnect(StringTokenizer t) {
try {
LaunchTool.queryAndLaunchVM(runtime);
} catch (VMLaunchFailureException e) {
env.failure("Attempt to connect failed.");
}
}
private void commandWhere(StringTokenizer t, boolean showPC) throws NoSessionException {
ThreadReference current = context.getCurrentThread();
if (!t.hasMoreTokens()) {
if (current == null) {
env.error("No thread specified.");
return;
}
dumpStack(current, showPC);
} else {
String token = t.nextToken();
if (token.toLowerCase().equals("all")) {
ThreadIterator it = allThreads();
while (it.hasNext()) {
ThreadReference thread = it.next();
out.println(thread.name() + ": ");
dumpStack(thread, showPC);
}
} else {
ThreadReference thread = findThread(t.nextToken());
// ### Do we want to set current thread here?
// ### Should notify user of change.
if (thread != null) {
context.setCurrentThread(thread);
}
dumpStack(thread, showPC);
}
}
}
private void commandCont() throws NoSessionException {
try {
runtime.go();
} catch (VMNotInterruptedException e) {
// ### failure?
env.notice("Target VM is already running.");
}
}
private void commandThreads(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
OutputSink out = env.getOutputSink();
printThreadGroup(out, getDefaultThreadGroup(), 0);
out.show();
return;
}
String name = t.nextToken();
ThreadGroupReference tg = findThreadGroup(name);
if (tg == null) {
env.failure(name + " is not a valid threadgroup name.");
} else {
OutputSink out = env.getOutputSink();
printThreadGroup(out, tg, 0);
out.show();
}
}
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 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 void commandFrame(StringTokenizer t) throws NoSessionException {
ThreadReference current = context.getCurrentThread();
if (current == null) {
env.failure("No current thread.");
return;
}
if (!t.hasMoreTokens()) {
env.error("usage: frame <frame-index>");
return;
}
String idToken = t.nextToken();
int n;
try {
n = Integer.valueOf(idToken).intValue();
} catch (NumberFormatException e) {
n = 0;
}
if (n <= 0) {
env.error("use positive frame index");
return;
}
try {
int delta = context.setCurrentFrameIndex(current, n);
if (delta == 0) {
env.notice("Frame unchanged.");
} else if (delta < 0) {
env.notice("Moved up " + -delta + " frames.");
} else {
env.notice("Moved down " + delta + " frames.");
}
} catch (VMNotInterruptedException e) {
env.failure("Target VM must be in interrupted state.");
}
}
private void commandView(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
env.error("Argument required");
} else {
String name = t.nextToken();
if (name.endsWith(".java") || name.indexOf(File.separatorChar) >= 0) {
env.viewSource(name);
} else {
// ### JDI crashes taking line number for class.
/**
* *** ReferenceType cls = findClass(name); if (cls != null) {
* env.viewLocation(cls.location()); } else { env.failure("No such class"); } ***
*/
String fileName = name.replace('.', File.separatorChar) + ".java";
env.viewSource(fileName);
}
}
}
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 commandThreadGroups() throws NoSessionException {
ThreadGroupIterator it = allThreadGroups();
int cnt = 0;
OutputSink out = env.getOutputSink();
while (it.hasNext()) {
ThreadGroupReference tg = it.nextThreadGroup();
++cnt;
out.println("" + cnt + ". " + Utils.description(tg) + " " + tg.name());
}
out.show();
}
private void commandThread(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
env.error("Thread number not specified.");
return;
}
ThreadReference thread = findThread(t.nextToken());
if (thread != null) {
// ### Should notify user.
context.setCurrentThread(thread);
}
}
private void commandDown(StringTokenizer t) throws NoSessionException {
ThreadReference current = context.getCurrentThread();
if (current == null) {
env.failure("No current thread.");
return;
}
int nLevels = readCount(t);
if (nLevels <= 0) {
env.error("usage: down [n frames]");
return;
}
try {
int delta = context.moveCurrentFrameIndex(current, nLevels);
if (delta == 0) {
env.notice("Already at bottom of stack.");
} else if (delta < nLevels) {
env.notice("Moved down " + delta + " frames to bottom of stack.");
}
} catch (VMNotInterruptedException e) {
env.failure("Target VM must be in interrupted state.");
}
}
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);
}
}
public StackTraceTool(Environment env) {
super(new BorderLayout());
this.env = env;
this.runtime = env.getExecutionManager();
this.context = env.getContextManager();
stackModel = new DefaultListModel(); // empty
list = new JList(stackModel);
list.setCellRenderer(new StackFrameRenderer());
JScrollPane listView = new JScrollPane(list);
add(listView);
// Create listener.
StackTraceToolListener listener = new StackTraceToolListener();
context.addContextListener(listener);
list.addListSelectionListener(listener);
// ### remove listeners on exit!
}
private void commandLocals() throws NoSessionException {
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;
}
List<LocalVariable> vars;
try {
vars = frame.visibleVariables();
if (vars == null || vars.size() == 0) {
env.failure("No local variables");
return;
}
} catch (AbsentInformationException e) {
env.failure(
"Local variable information not available."
+ " Compile with -g to generate variable information");
return;
}
OutputSink out = env.getOutputSink();
out.println("Method arguments:");
for (LocalVariable var : vars) {
if (var.isArgument()) {
printVar(out, var, frame);
}
}
out.println("Local variables:");
for (LocalVariable var : vars) {
if (!var.isArgument()) {
printVar(out, var, frame);
}
}
out.show();
return;
}
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 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 commandList(StringTokenizer t) throws NoSessionException {
ThreadReference current = context.getCurrentThread();
if (current == null) {
env.error("No thread specified.");
return;
}
Location loc;
try {
StackFrame frame = context.getCurrentFrame(current);
if (frame == null) {
env.failure("Thread has not yet begun execution.");
return;
}
loc = frame.location();
} catch (VMNotInterruptedException e) {
env.failure("Target VM must be in interrupted state.");
return;
}
SourceModel source = sourceManager.sourceForLocation(loc);
if (source == null) {
if (loc.method().isNative()) {
env.failure("Current method is native.");
return;
}
env.failure("No source available for " + Utils.locationString(loc) + ".");
return;
}
ReferenceType refType = loc.declaringType();
int lineno = loc.lineNumber();
if (t.hasMoreTokens()) {
String id = t.nextToken();
// See if token is a line number.
try {
lineno = Integer.valueOf(id).intValue();
} catch (NumberFormatException nfe) {
// It isn't -- see if it's a method name.
List<Method> meths = refType.methodsByName(id);
if (meths == null || meths.size() == 0) {
env.failure(
id + " is not a valid line number or " + "method name for class " + refType.name());
return;
} else if (meths.size() > 1) {
env.failure(id + " is an ambiguous method name in" + refType.name());
return;
}
loc = meths.get(0).location();
lineno = loc.lineNumber();
}
}
int startLine = (lineno > 4) ? lineno - 4 : 1;
int endLine = startLine + 9;
String sourceLine = source.sourceLine(lineno);
if (sourceLine == null) {
env.failure("" + lineno + " is an invalid line number for " + refType.name());
} else {
OutputSink out = env.getOutputSink();
for (int i = startLine; i <= endLine; i++) {
sourceLine = source.sourceLine(i);
if (sourceLine == null) {
break;
}
out.print(i);
out.print("\t");
if (i == lineno) {
out.print("=> ");
} else {
out.print(" ");
}
out.println(sourceLine);
}
out.show();
}
}