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public class getstacktrace
extends Thread
{
public boolean done = false;
// num_frames is the number of frames > the original run () call so if
// num_frames = 1, the thread will have 2 frames, the original Thread.run
// call, plus one additional
public int num_frames, thread_num;
public static int num_threads = 1;
static
{
System.loadLibrary("natgetstacktrace");
}
public void run ()
{
thread_num = num_threads++;
num_frames = thread_num;
if (num_frames <= 1)
{
natRunner ();
}
else
{
if (thread_num % 2 == 0)
natPlaceholder ();
else
placeholder ();
}
}
public void placeholder ()
{
num_frames--;
if (num_frames <= 1)
{
if (thread_num % 2 == 1)
natRunner ();
else
runner ();
}
else
{
if (thread_num % 2 == 0)
natPlaceholder ();
else
placeholder ();
}
}
public void runner ()
{
done = true;
while (done)
yield ();
}
public native void natPlaceholder ();
public native void natRunner ();
public static native int do_getstacktrace_tests (Thread[] threads);
public static void main (String[] args)
{
System.out.println ("JVMTI GetStackTrace Interpreted Test");
getstacktrace[] threads = new getstacktrace[10];
for (int i = 0; i < threads.length; i++)
{
threads[i] = new getstacktrace ();
threads[i].start ();
while (!threads[i].done)
yield ();
}
do_getstacktrace_tests (threads);
for (int i = 0; i < threads.length; i++)
{
threads[i].done = false;
}
}
}
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