private static synchronized Throwable fillInStackTrace(Throwable instance) {
ObjectReference.fromObject(instance)
.toAddress()
.add(BACKTRACE_OFFSET)
.store(
ObjectReference.fromObject(
VmThread.getStackTrace(VmProcessor.current().getCurrentThread())));
return instance;
}
/**
* Traverse the ThreadGroups threads and its child ThreadGroups printing information for each
* thread found. If 'threadName' is non-null, only print information for the thread that matches
* the name.
*
* @param grp the ThreadGroup to traverse
* @param out the destination for output
* @param threadName if non-null, only display this thread.
*/
private void showThreads(ThreadGroup grp, PrintWriter out, String threadName) {
if (threadName == null) {
out.println(GROUP + grp.getName());
}
final int max = grp.activeCount() * 2;
final Thread[] ts = new Thread[max];
grp.enumerate(ts);
for (int i = 0; i < max; i++) {
final Thread t = ts[i];
if (t != null) {
if ((threadName == null) || threadName.equals(t.getName())) {
VmThread vmThread =
AccessController.doPrivileged(
new PrivilegedAction<VmThread>() {
public VmThread run() {
return ThreadHelper.getVmThread(t);
}
});
out.println(
SLASH_T
+ t.getId()
+ SEPARATOR
+ t.getName()
+ SEPARATOR
+ t.getPriority()
+ SEPARATOR
+ vmThread.getThreadStateName());
if (threadName != null) {
final Object[] trace = VmThread.getStackTrace(vmThread);
final int traceLen = trace.length;
out.println(SLASH_T + SLASH_T + TRACE);
for (int k = 0; k < traceLen; k++) {
out.println(SLASH_T + SLASH_T + trace[k]);
}
return;
}
}
}
}
final int gmax = grp.activeGroupCount() * 2;
final ThreadGroup[] tgs = new ThreadGroup[gmax];
grp.enumerate(tgs);
for (int i = 0; i < gmax; i++) {
final ThreadGroup tg = tgs[i];
if (tg != null) {
showThreads(tg, out, threadName);
}
}
}
/**
* Show the current stacktrace using Screen.debug. TODO that method only exist to have line
* numbers : find a way to add line numbers to debugStackTrace(max)
*/
@KernelSpace
public final void debugStackTraceWithLineNumbers(int max) {
final VmThread current = VmThread.currentThread();
final VmStackFrame[] frames = (VmStackFrame[]) VmThread.getStackTrace(current);
if (frames == null) {
Unsafe.debug("Debug stacktrace:<no stack trace>\n");
} else {
Unsafe.debug("Debug stacktrace: ");
for (VmStackFrame frame : frames) {
final VmStackFrame s = (VmStackFrame) frame;
Unsafe.debug(s.getMethod().getDeclaringClass().getName());
Unsafe.debug("::");
Unsafe.debug(s.getMethod().getName());
Unsafe.debug(":");
Unsafe.debug(s.getLocationInfo());
Unsafe.debug('\n');
}
}
}