public void exceptionEvent(ExceptionEvent event) {
ObjectReference or = event.exception();
ReferenceType rt = or.referenceType();
String exceptionName = rt.name();
// Field messageField = Throwable.class.getField("detailMessage");
Field messageField = rt.fieldByName("detailMessage");
// System.out.println("field " + messageField);
Value messageValue = or.getValue(messageField);
// System.out.println("mess val " + messageValue);
// "java.lang.ArrayIndexOutOfBoundsException"
int last = exceptionName.lastIndexOf('.');
String message = exceptionName.substring(last + 1);
if (messageValue != null) {
String messageStr = messageValue.toString();
if (messageStr.startsWith("\"")) {
messageStr = messageStr.substring(1, messageStr.length() - 1);
}
message += ": " + messageStr;
}
// System.out.println("mess type " + messageValue.type());
// StringReference messageReference = (StringReference) messageValue.type();
// First just report the exception and its placement
reportException(message, or, event.thread());
// Then try to pretty it up with a better message
handleCommonErrors(exceptionName, message, listener);
if (editor != null) {
editor.deactivateRun();
}
}
/**
* 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;
}