/** if this line can not be current => stepOver & return true. return false on the other hand. */
boolean resolveCanBeCurrent(ThreadReference tr) {
try {
Location l = tr.frame(0).location();
if (l == null) return false;
return resolveCanBeCurrent(
tr, Utils.getLineForSource(l.declaringType().name(), l.sourceName(), l.lineNumber()));
} catch (Exception e) {
}
return false;
}
public void resume() {
switch (suspendPolicy()) {
case EventRequest.SUSPEND_ALL:
vm.resume();
break;
case EventRequest.SUSPEND_EVENT_THREAD:
ThreadReference thread = eventThread();
if (thread == null) {
throw new InternalException("Inconsistent suspend policy");
}
thread.resume();
break;
case EventRequest.SUSPEND_NONE:
// Do nothing
break;
default:
throw new InternalException("Invalid suspend policy");
}
}
/** Executes breakpoint hit event. */
public void exec(com.sun.jdi.event.Event ev) {
// S ystem.out.println ("exec "); // NOI18N
removeStepRequest();
StepEvent event = (StepEvent) ev;
ThreadReference tr = event.thread();
Location loc = event.location();
int ln = -1;
String methodName = "?"; // NOI18N
String className = "?"; // NOI18N
String lineNumber = "?"; // NOI18N
String threadName = tr.name();
Line l = null;
if (loc != null) {
if (loc.method() != null) methodName = loc.method().name();
className = loc.declaringType().name();
ln = loc.lineNumber();
if (ln >= 0) lineNumber = "" + loc.lineNumber();
}
if (ln != -1)
try {
l = Utils.getLineForSource(className, loc.sourceName(), ln);
} catch (AbsentInformationException e) {
l = Utils.getLine(className, ln);
}
if (resolveCanBeCurrent(tr, l))
// if this line can not be current resolveCanBeCurrent () calls stepOver
return;
// line can be current
if ((l == null) && (getLastAction() == ACTION_TRACE_INTO))
// try to find another "intelligent" line of code
traceToSourceCode(tr);
// you know - intelligent means that one with source code
else {
makeCurrent(threadName, className, methodName, lineNumber, l != null, tr);
operator.stopRequest();
}
}
/**
* 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;
}
public void breakpointReached(BreakpointEvent event) {
String origMethodName = event.location().method().name();
String methodName = origMethodName.substring(2);
ThreadReference tr = event.thread();
if (vm().canForceEarlyReturn()) {
try {
if ("bytef".equals(methodName)) {
Field theValueField = targetClass.fieldByName("ebyteValue");
ByteValue theValue = (ByteValue) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
/*
* See what happens if we access the stack after the force
* and before the resume. Disabling this since spec says
* the stack is undefined. This type of code can be used to
* pursue just what that means.
*
* StackFrame sf = tr.frame(0);
* List<Value> ll = sf.getArgumentValues();
* for (Value vv: ll) {
* System.out.println("vv = " + vv);
* }
*/
} else if ("charf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("echarValue");
CharValue theValue = (CharValue) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("doublef".equals(methodName)) {
Field theValueField = targetClass.fieldByName("edoubleValue");
DoubleValue theValue = (DoubleValue) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("floatf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("efloatValue");
FloatValue theValue = (FloatValue) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("intf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("eintValue");
IntegerValue theValue = (IntegerValue) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("longf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("elongValue");
LongValue theValue = (LongValue) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("shortf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("eshortValue");
ShortValue theValue = (ShortValue) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("booleanf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("ebooleanValue");
BooleanValue theValue = (BooleanValue) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("stringf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("estringValue");
StringReference theValue = (StringReference) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("classf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("eclassValue");
ClassObjectReference theValue =
(ClassObjectReference) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("classLoaderf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("eclassLoaderValue");
ClassLoaderReference theValue =
(ClassLoaderReference) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("threadf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("ethreadValue");
ThreadReference theValue = (ThreadReference) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("threadGroupf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("ethreadGroupValue");
ThreadGroupReference theValue =
(ThreadGroupReference) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("intArrayf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("eintArrayValue");
ArrayReference theValue = (ArrayReference) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("nullObjectf".equals(methodName)) {
tr.forceEarlyReturn(null);
} else if ("objectf".equals(methodName)) {
Field theValueField = targetClass.fieldByName("eobjectValue");
ObjectReference theValue = (ObjectReference) targetClass.getValue(theValueField);
tr.forceEarlyReturn(theValue);
} else if ("voidf".equals(methodName)) {
VoidValue theValue = vm().mirrorOfVoid();
tr.forceEarlyReturn(theValue);
} else {
failure("failure: Unknown methodName: " + origMethodName);
}
} catch (Exception ex) {
failure("failure: " + ex.toString());
ex.printStackTrace();
}
} else {
System.out.println("Cannot force early return for method: " + origMethodName);
}
}
/*
* Complete the construction of an EventSet. This is called from
* an event handler thread. It upacks the JDWP events inside
* the packet and creates EventImpls for them. The EventSet is already
* on EventQueues when this is called, so it has to be synch.
*/
synchronized void build() {
if (pkt == null) {
return;
}
PacketStream ps = new PacketStream(vm, pkt);
JDWP.Event.Composite compEvt = new JDWP.Event.Composite(vm, ps);
suspendPolicy = compEvt.suspendPolicy;
if ((vm.traceFlags & vm.TRACE_EVENTS) != 0) {
switch (suspendPolicy) {
case JDWP.SuspendPolicy.ALL:
vm.printTrace("EventSet: SUSPEND_ALL");
break;
case JDWP.SuspendPolicy.EVENT_THREAD:
vm.printTrace("EventSet: SUSPEND_EVENT_THREAD");
break;
case JDWP.SuspendPolicy.NONE:
vm.printTrace("EventSet: SUSPEND_NONE");
break;
}
}
ThreadReference fix6485605 = null;
for (int i = 0; i < compEvt.events.length; i++) {
EventImpl evt = createEvent(compEvt.events[i]);
if ((vm.traceFlags & vm.TRACE_EVENTS) != 0) {
try {
vm.printTrace("Event: " + evt);
} catch (VMDisconnectedException ee) {
// ignore - see bug 6502716
}
}
switch (evt.destination()) {
case UNKNOWN_EVENT:
// Ignore disabled, deleted, unknown events, but
// save the thread if there is one since we might
// have to resume it. Note that events for different
// threads can't be in the same event set.
if (evt instanceof ThreadedEventImpl
&& suspendPolicy == JDWP.SuspendPolicy.EVENT_THREAD) {
fix6485605 = ((ThreadedEventImpl) evt).thread();
}
continue;
case CLIENT_EVENT:
addEvent(evt);
break;
case INTERNAL_EVENT:
if (internalEventSet == null) {
internalEventSet = new EventSetImpl(this.vm, null);
}
internalEventSet.addEvent(evt);
break;
default:
throw new InternalException("Invalid event destination");
}
}
pkt = null; // No longer needed - free it up
// Avoid hangs described in 6296125, 6293795
if (super.size() == 0) {
// This set has no client events. If we don't do
// needed resumes, no one else is going to.
if (suspendPolicy == JDWP.SuspendPolicy.ALL) {
vm.resume();
} else if (suspendPolicy == JDWP.SuspendPolicy.EVENT_THREAD) {
// See bug 6485605.
if (fix6485605 != null) {
fix6485605.resume();
} else {
// apparently, there is nothing to resume.
}
}
suspendPolicy = JDWP.SuspendPolicy.NONE;
}
}
public String toString() {
return eventName() + " in thread " + thread.name();
}