/**
* Create the VMThrowable
*
* @return constructed VMThrowable
*/
static VMThrowable fillInStackTrace(Throwable parent) {
if (!VM.fullyBooted) {
return null;
} else if (RVMThread.getCurrentThread().isCollectorThread()) {
VM.sysWriteln("Exception in GC thread");
RVMThread.dumpVirtualMachine();
return null;
}
try {
StackTrace stackTrace = new StackTrace();
return new VMThrowable(stackTrace);
} catch (OutOfMemoryError oome) {
return null;
} catch (Throwable t) {
VM.sysFail(
"VMThrowable.fillInStackTrace(): Cannot fill in a stack trace; got a weird Throwable when I tried to");
return null;
}
}
/**
* Get return address for a frame in the current thread
*
* @param fp its frame pointer
*/
@Uninterruptible
public static Address getReturnAddress(Address fp) {
return getReturnAddress(fp, RVMThread.getCurrentThread());
}
/** Return the stack trace */
StackTraceElement[] getStackTrace(Throwable parent) {
if (stackTrace == null) {
return zeroLengthStackTrace;
} else if (RVMThread.getCurrentThread().isCollectorThread()) {
VM.sysWriteln(
"VMThrowable.getStackTrace called from GC thread: dumping stack using scheduler");
RVMThread.dumpStack();
return zeroLengthStackTrace;
}
StackTrace.Element[] vmElements;
try {
vmElements = stackTrace.getStackTrace(parent);
} catch (Throwable t) {
VM.sysWriteln("Error calling StackTrace.getStackTrace: dumping stack using scheduler");
RVMThread.dumpStack();
return zeroLengthStackTrace;
}
if (vmElements == null) {
VM.sysWriteln("Error calling StackTrace.getStackTrace returned null");
RVMThread.dumpStack();
return zeroLengthStackTrace;
}
if (VM.fullyBooted) {
try {
StackTraceElement[] elements = new StackTraceElement[vmElements.length];
for (int i = 0; i < vmElements.length; i++) {
StackTrace.Element vmElement = vmElements[i];
String fileName = vmElement.getFileName();
int lineNumber = vmElement.getLineNumber();
String className = vmElement.getClassName();
String methodName = vmElement.getMethodName();
boolean isNative = vmElement.isNative();
elements[i] =
new StackTraceElement(fileName, lineNumber, className, methodName, isNative);
}
return elements;
} catch (Throwable t) {
VM.sysWriteln("Error constructing StackTraceElements: dumping stack");
}
} else {
VM.sysWriteln("Dumping stack using sysWrite in not fullyBooted VM");
}
for (StackTrace.Element vmElement : vmElements) {
if (vmElement == null) {
VM.sysWriteln("Error stack trace with null entry");
RVMThread.dumpStack();
return zeroLengthStackTrace;
}
String fileName = vmElement.getFileName();
int lineNumber = vmElement.getLineNumber();
String className = vmElement.getClassName();
String methodName = vmElement.getMethodName();
VM.sysWrite(" at ");
if (!className.isEmpty()) {
VM.sysWrite(className);
VM.sysWrite(".");
}
VM.sysWrite(methodName);
if (fileName != null) {
VM.sysWrite("(");
VM.sysWrite(fileName);
if (lineNumber > 0) {
VM.sysWrite(":");
VM.sysWrite(vmElement.getLineNumber());
}
VM.sysWrite(")");
}
VM.sysWriteln();
}
return zeroLengthStackTrace;
}