protected void runTests() throws Exception {
/*
* Get to the top of main()
* to determine targetClass and mainThread
*/
BreakpointEvent bpe = startToMain("GetLocalVariables2Targ");
targetClass = bpe.location().declaringType();
mainThread = bpe.thread();
EventRequestManager erm = vm().eventRequestManager();
bpe = resumeTo("GetLocalVariables2Targ", "bar", "(I)Z");
/*
* Inspect the stack frame for main(), not bar()...
*/
StackFrame frame = bpe.thread().frame(1);
List localVars = frame.visibleVariables();
System.out.println(" Visible variables at this point are: ");
for (Iterator it = localVars.iterator(); it.hasNext(); ) {
LocalVariable lv = (LocalVariable) it.next();
System.out.print(lv.name());
System.out.print(" typeName: ");
System.out.print(lv.typeName());
System.out.print(" signature: ");
System.out.print(lv.type().signature());
System.out.print(" primitive type: ");
System.out.println(lv.type().name());
if ("command".equals(lv.name())) {
failure("Failure: LocalVariable \"command\" should not be visible at this point.");
if (lv.isVisible(frame)) {
System.out.println("Failure: \"command.isvisible(frame)\" returned true.");
}
}
}
/*
* resume the target listening for events
*/
listenUntilVMDisconnect();
/*
* deal with results of test
* if anything has called failure("foo") testFailed will be true
*/
if (!testFailed) {
println("GetLocalVariables2Test: passed");
} else {
throw new Exception("GetLocalVariables2Test: failed");
}
}
public char[][] localVariableTypeNames() {
try {
StackFrame frame = getStackFrame();
Iterator variables = frame.visibleVariables().iterator();
Vector names = new Vector();
while (variables.hasNext()) {
LocalVariable var = (LocalVariable) variables.next();
names.addElement(var.typeName().toCharArray());
}
char[][] result = new char[names.size()][];
names.copyInto(result);
return result;
} catch (AbsentInformationException e) {
return null;
}
}
void printVariable(LocalVariable lv, int index) throws Exception {
if (lv == null) {
println(" Var name: null");
return;
}
String tyname = lv.typeName();
println(
" Var: "
+ lv.name()
+ ", index: "
+ index
+ ", type: "
+ tyname
+ ", Signature: "
+ lv.type().signature());
// Sorry, there is no way to take local variable slot numbers using JDI!
// It is because method LocalVariableImpl.slot() is private.
}
/*
* This function appears to take an exorbitant amount of time why why why
*/
public boolean setLocalVariableValue(int i, String name, Value sf)
throws IncompatibleThreadStateException, InvalidTypeException, ClassNotLoadedException,
AbsentInformationException {
StackFrame frame = this.currentThread.frames().get(i);
LocalVariable var = frame.visibleVariableByName(name);
LOGGER.info("got var: " + var.typeName());
try {
frame.setValue(var, sf);
LOGGER.info("success setting new variable value");
return true;
} catch (java.lang.ClassCastException e) {
/*
* KNOWN ISSUE: when checking type compatibility the debugger
* requests the ClassLoader of the type of the variable. When an
* object is loaded via reflection (using the current method) this
* will return an ObjectReference. The debugger is expecting a
* ClassLoaderReference and apparently the ObjectReference cannot be
* cast to a ClassLoaderReference.
*/
LOGGER.info(
"ClassCastException due to type assignments with classes loaded via reflection, work around is to load class again");
}
return false;
}