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 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 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 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 commandNexti() throws NoSessionException {
ThreadReference current = context.getCurrentThread();
if (current == null) {
env.failure("No current thread.");
return;
}
runtime.stepOverInstruction(current);
}
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 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 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.");
}
}
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 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 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();
}
}
