hrm...

[Adam Megacz <gcj at lists dot megacz dot com>]

In TinySSL, I generate some entropy like this:

    static class entropySpinner extends Thread {
        volatile boolean stop = false;
        byte counter = 0;
        entropySpinner() { start(); }
        public void run() {
            System.out.println("start!");
            while (!stop) counter++;
            System.out.println("stop!");
        }
    }

    entropySpinner[] spinners = new entropySpinner[10];
    for(int i=0; i<spinners.length; i++) spinners[i] = new entropySpinner();
    try { Thread.sleep(100); } catch (Exception e) { }
    for(int i=0; i<spinners.length; i++) {
        spinners[i].stop = true;
        randpool[i] = spinners[i].counter;
    }

But for some reason, under GCJ, the spinners keep spinning... the
thread never stops. Could it be possible that GCJ is overaggressively
optimizing out the while loop's test and turning it into an infinite
loop?

  - a

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