@Override
public Component getListCellRendererComponent(
JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
// ### We should indicate the current thread independently of the
// ### selection, e.g., with an icon, because the user may change
// ### the selection graphically without affecting the current
// ### thread.
super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
if (value == null) {
this.setText("<unavailable>");
} else {
StackFrame frame = (StackFrame) value;
Location loc = frame.location();
Method meth = loc.method();
String methName = meth.declaringType().name() + '.' + meth.name();
String position = "";
if (meth.isNative()) {
position = " (native method)";
} else if (loc.lineNumber() != -1) {
position = ":" + loc.lineNumber();
} else {
long pc = loc.codeIndex();
if (pc != -1) {
position = ", pc = " + pc;
}
}
// Indices are presented to the user starting from 1, not 0.
this.setText("[" + (index + 1) + "] " + methName + position);
}
return this;
}
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 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 printVar(OutputSink out, LocalVariable var, StackFrame frame) {
out.print(" " + var.name());
if (var.isVisible(frame)) {
Value val = frame.getValue(var);
out.println(" = " + val.toString());
} else {
out.println(" is not in scope");
}
}
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();
}
}