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();
}
}
/**
* Move through a list of stack frames, searching for references to code found in the current
* sketch. Return with a RunnerException that contains the location of the error, or if nothing is
* found, just return with a RunnerException that wraps the error message itself.
*/
protected SketchException findException(
String message, ObjectReference or, ThreadReference thread) {
try {
// use to dump the stack for debugging
// for (StackFrame frame : thread.frames()) {
// System.out.println("frame: " + frame);
// }
List<StackFrame> frames = thread.frames();
for (StackFrame frame : frames) {
try {
Location location = frame.location();
String filename = null;
filename = location.sourceName();
int lineNumber = location.lineNumber() - 1;
SketchException rex = build.placeException(message, filename, lineNumber);
if (rex != null) {
return rex;
}
} catch (AbsentInformationException e) {
// Any of the thread.blah() methods can throw an AbsentInformationEx
// if that bit of data is missing. If so, just write out the error
// message to the console.
// e.printStackTrace(); // not useful
exception = new SketchException(message);
exception.hideStackTrace();
listener.statusError(exception);
}
}
} catch (IncompatibleThreadStateException e) {
// This shouldn't happen, but if it does, print the exception in case
// it's something that needs to be debugged separately.
e.printStackTrace();
}
// before giving up, try to extract from the throwable object itself
// since sometimes exceptions are re-thrown from a different context
try {
// assume object reference is Throwable, get stack trace
Method method =
((ClassType) or.referenceType())
.concreteMethodByName("getStackTrace", "()[Ljava/lang/StackTraceElement;");
ArrayReference result =
(ArrayReference)
or.invokeMethod(
thread, method, new ArrayList<Value>(), ObjectReference.INVOKE_SINGLE_THREADED);
// iterate through stack frames and pull filename and line number for each
for (Value val : result.getValues()) {
ObjectReference ref = (ObjectReference) val;
method =
((ClassType) ref.referenceType())
.concreteMethodByName("getFileName", "()Ljava/lang/String;");
StringReference strref =
(StringReference)
ref.invokeMethod(
thread, method, new ArrayList<Value>(), ObjectReference.INVOKE_SINGLE_THREADED);
String filename = strref == null ? "Unknown Source" : strref.value();
method = ((ClassType) ref.referenceType()).concreteMethodByName("getLineNumber", "()I");
IntegerValue intval =
(IntegerValue)
ref.invokeMethod(
thread, method, new ArrayList<Value>(), ObjectReference.INVOKE_SINGLE_THREADED);
int lineNumber = intval.intValue() - 1;
SketchException rex = build.placeException(message, filename, lineNumber);
if (rex != null) {
return rex;
}
}
// for (Method m : ((ClassType) or.referenceType()).allMethods()) {
// System.out.println(m + " | " + m.signature() + " | " + m.genericSignature());
// }
// Implemented for 2.0b9, writes a stack trace when there's an internal error inside core.
method = ((ClassType) or.referenceType()).concreteMethodByName("printStackTrace", "()V");
// System.err.println("got method " + method);
or.invokeMethod(
thread, method, new ArrayList<Value>(), ObjectReference.INVOKE_SINGLE_THREADED);
} catch (Exception e) {
e.printStackTrace();
}
// Give up, nothing found inside the pile of stack frames
SketchException rex = new SketchException(message);
// exception is being created /here/, so stack trace is not useful
rex.hideStackTrace();
return rex;
}
private static List<ThreadState> buildThreadStates(VirtualMachineProxyImpl vmProxy) {
final List<ThreadReference> threads = vmProxy.getVirtualMachine().allThreads();
final List<ThreadState> result = new ArrayList<ThreadState>();
final Map<String, ThreadState> nameToThreadMap = new HashMap<String, ThreadState>();
final Map<String, String> waitingMap = new HashMap<String, String>(); // key 'waits_for' value
for (ThreadReference threadReference : threads) {
final StringBuilder buffer = new StringBuilder();
boolean hasEmptyStack = true;
final String threadName = threadName(threadReference);
final int threadStatus = threadReference.status();
final ThreadState threadState =
new ThreadState(threadName, threadStatusToState(threadStatus));
nameToThreadMap.put(threadName, threadState);
result.add(threadState);
threadState.setJavaThreadState(threadStatusToJavaThreadState(threadStatus));
buffer.append(threadName);
ReferenceType referenceType = threadReference.referenceType();
if (referenceType != null) {
//noinspection HardCodedStringLiteral
Field daemon = referenceType.fieldByName("daemon");
if (daemon != null) {
Value value = threadReference.getValue(daemon);
if (value instanceof BooleanValue && ((BooleanValue) value).booleanValue()) {
buffer
.append(" ")
.append(DebuggerBundle.message("threads.export.attribute.label.daemon"));
}
}
//noinspection HardCodedStringLiteral
Field priority = referenceType.fieldByName("priority");
if (priority != null) {
Value value = threadReference.getValue(priority);
if (value instanceof IntegerValue) {
buffer
.append(", ")
.append(
DebuggerBundle.message(
"threads.export.attribute.label.priority",
((IntegerValue) value).intValue()));
}
}
}
ThreadGroupReference groupReference = threadReference.threadGroup();
if (groupReference != null) {
buffer
.append(", ")
.append(
DebuggerBundle.message(
"threads.export.attribute.label.group", groupReference.name()));
}
buffer
.append(", ")
.append(
DebuggerBundle.message(
"threads.export.attribute.label.status", threadState.getState()));
buffer.append("\n java.lang.Thread.State: ").append(threadState.getJavaThreadState());
try {
if (vmProxy.canGetOwnedMonitorInfo() && vmProxy.canGetMonitorInfo()) {
List<ObjectReference> list = threadReference.ownedMonitors();
for (ObjectReference reference : list) {
final List<ThreadReference> waiting = reference.waitingThreads();
for (ThreadReference thread : waiting) {
final String waitingThreadName = threadName(thread);
waitingMap.put(waitingThreadName, threadName);
buffer
.append("\n\t ")
.append(
DebuggerBundle.message(
"threads.export.attribute.label.blocks.thread", waitingThreadName));
}
}
}
ObjectReference waitedMonitor =
vmProxy.canGetCurrentContendedMonitor()
? threadReference.currentContendedMonitor()
: null;
if (waitedMonitor != null) {
if (vmProxy.canGetMonitorInfo()) {
ThreadReference waitedMonitorOwner = waitedMonitor.owningThread();
if (waitedMonitorOwner != null) {
final String monitorOwningThreadName = threadName(waitedMonitorOwner);
waitingMap.put(threadName, monitorOwningThreadName);
buffer
.append("\n\t ")
.append(
DebuggerBundle.message(
"threads.export.attribute.label.waiting.for.thread",
monitorOwningThreadName));
}
}
}
final List<StackFrame> frames = threadReference.frames();
hasEmptyStack = frames.size() == 0;
for (StackFrame stackFrame : frames) {
final Location location = stackFrame.location();
buffer.append("\n\t ").append(renderLocation(location));
}
} catch (IncompatibleThreadStateException e) {
buffer
.append("\n\t ")
.append(DebuggerBundle.message("threads.export.attribute.error.incompatible.state"));
}
threadState.setStackTrace(buffer.toString(), hasEmptyStack);
ThreadDumpParser.inferThreadStateDetail(threadState);
}
for (String waiting : waitingMap.keySet()) {
final ThreadState waitingThread = nameToThreadMap.get(waiting);
final ThreadState awaitedThread = nameToThreadMap.get(waitingMap.get(waiting));
awaitedThread.addWaitingThread(waitingThread);
}
// detect simple deadlocks
for (ThreadState thread : result) {
for (ThreadState awaitingThread : thread.getAwaitingThreads()) {
if (awaitingThread.isAwaitedBy(thread)) {
thread.addDeadlockedThread(awaitingThread);
awaitingThread.addDeadlockedThread(thread);
}
}
}
ThreadDumpParser.sortThreads(result);
return result;
}
private static List<ThreadState> buildThreadStates(VirtualMachineProxyImpl vmProxy) {
final List<ThreadReference> threads = vmProxy.getVirtualMachine().allThreads();
final List<ThreadState> result = new ArrayList<ThreadState>();
final Map<String, ThreadState> nameToThreadMap = new HashMap<String, ThreadState>();
final Map<String, String> waitingMap = new HashMap<String, String>(); // key 'waits_for' value
for (ThreadReference threadReference : threads) {
final StringBuilder buffer = new StringBuilder();
boolean hasEmptyStack = true;
final int threadStatus = threadReference.status();
if (threadStatus == ThreadReference.THREAD_STATUS_ZOMBIE) {
continue;
}
final String threadName = threadName(threadReference);
final ThreadState threadState =
new ThreadState(threadName, threadStatusToState(threadStatus));
nameToThreadMap.put(threadName, threadState);
result.add(threadState);
threadState.setJavaThreadState(threadStatusToJavaThreadState(threadStatus));
buffer.append("\"").append(threadName).append("\"");
ReferenceType referenceType = threadReference.referenceType();
if (referenceType != null) {
//noinspection HardCodedStringLiteral
Field daemon = referenceType.fieldByName("daemon");
if (daemon != null) {
Value value = threadReference.getValue(daemon);
if (value instanceof BooleanValue && ((BooleanValue) value).booleanValue()) {
buffer
.append(" ")
.append(DebuggerBundle.message("threads.export.attribute.label.daemon"));
threadState.setDaemon(true);
}
}
//noinspection HardCodedStringLiteral
Field priority = referenceType.fieldByName("priority");
if (priority != null) {
Value value = threadReference.getValue(priority);
if (value instanceof IntegerValue) {
buffer
.append(" ")
.append(
DebuggerBundle.message(
"threads.export.attribute.label.priority",
((IntegerValue) value).intValue()));
}
}
Field tid = referenceType.fieldByName("tid");
if (tid != null) {
Value value = threadReference.getValue(tid);
if (value instanceof LongValue) {
buffer
.append(" ")
.append(
DebuggerBundle.message(
"threads.export.attribute.label.tid",
Long.toHexString(((LongValue) value).longValue())));
buffer.append(" nid=NA");
}
}
}
// ThreadGroupReference groupReference = threadReference.threadGroup();
// if (groupReference != null) {
// buffer.append(", ").append(DebuggerBundle.message("threads.export.attribute.label.group",
// groupReference.name()));
// }
final String state = threadState.getState();
if (state != null) {
buffer.append(" ").append(state);
}
buffer.append("\n java.lang.Thread.State: ").append(threadState.getJavaThreadState());
try {
if (vmProxy.canGetOwnedMonitorInfo() && vmProxy.canGetMonitorInfo()) {
List<ObjectReference> list = threadReference.ownedMonitors();
for (ObjectReference reference : list) {
if (!vmProxy.canGetMonitorFrameInfo()) { // java 5 and earlier
buffer.append("\n\t ").append(renderLockedObject(reference));
}
final List<ThreadReference> waiting = reference.waitingThreads();
for (ThreadReference thread : waiting) {
final String waitingThreadName = threadName(thread);
waitingMap.put(waitingThreadName, threadName);
buffer
.append("\n\t ")
.append(
DebuggerBundle.message(
"threads.export.attribute.label.blocks.thread", waitingThreadName));
}
}
}
ObjectReference waitedMonitor =
vmProxy.canGetCurrentContendedMonitor()
? threadReference.currentContendedMonitor()
: null;
if (waitedMonitor != null) {
if (vmProxy.canGetMonitorInfo()) {
ThreadReference waitedMonitorOwner = waitedMonitor.owningThread();
if (waitedMonitorOwner != null) {
final String monitorOwningThreadName = threadName(waitedMonitorOwner);
waitingMap.put(threadName, monitorOwningThreadName);
buffer
.append("\n\t ")
.append(
DebuggerBundle.message(
"threads.export.attribute.label.waiting.for.thread",
monitorOwningThreadName,
renderObject(waitedMonitor)));
}
}
}
final List<StackFrame> frames = threadReference.frames();
hasEmptyStack = frames.size() == 0;
final TIntObjectHashMap<List<ObjectReference>> lockedAt =
new TIntObjectHashMap<List<ObjectReference>>();
if (vmProxy.canGetMonitorFrameInfo()) {
for (MonitorInfo info : threadReference.ownedMonitorsAndFrames()) {
final int stackDepth = info.stackDepth();
List<ObjectReference> monitors;
if ((monitors = lockedAt.get(stackDepth)) == null) {
lockedAt.put(stackDepth, monitors = new SmartList<ObjectReference>());
}
monitors.add(info.monitor());
}
}
for (int i = 0, framesSize = frames.size(); i < framesSize; i++) {
final StackFrame stackFrame = frames.get(i);
try {
final Location location = stackFrame.location();
buffer.append("\n\t ").append(renderLocation(location));
final List<ObjectReference> monitors = lockedAt.get(i);
if (monitors != null) {
for (ObjectReference monitor : monitors) {
buffer.append("\n\t - ").append(renderLockedObject(monitor));
}
}
} catch (InvalidStackFrameException e) {
buffer.append("\n\t Invalid stack frame: ").append(e.getMessage());
}
}
} catch (IncompatibleThreadStateException e) {
buffer
.append("\n\t ")
.append(DebuggerBundle.message("threads.export.attribute.error.incompatible.state"));
}
threadState.setStackTrace(buffer.toString(), hasEmptyStack);
ThreadDumpParser.inferThreadStateDetail(threadState);
}
for (String waiting : waitingMap.keySet()) {
final ThreadState waitingThread = nameToThreadMap.get(waiting);
final ThreadState awaitedThread = nameToThreadMap.get(waitingMap.get(waiting));
awaitedThread.addWaitingThread(waitingThread);
}
// detect simple deadlocks
for (ThreadState thread : result) {
for (ThreadState awaitingThread : thread.getAwaitingThreads()) {
if (awaitingThread.isAwaitedBy(thread)) {
thread.addDeadlockedThread(awaitingThread);
awaitingThread.addDeadlockedThread(thread);
}
}
}
ThreadDumpParser.sortThreads(result);
return result;
}