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From "Vera Petrashkova (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-3627) [drlvm] VM works incorrectly if several threads catch StackOverflowError
Date Thu, 12 Apr 2007 04:33:32 GMT
[drlvm] VM works incorrectly if several threads catch StackOverflowError
------------------------------------------------------------------------

                 Key: HARMONY-3627
                 URL: https://issues.apache.org/jira/browse/HARMONY-3627
             Project: Harmony
          Issue Type: Bug
          Components: DRLVM
            Reporter: Vera Petrashkova
            Priority: Minor


When several threads expect  StackOverflowError then VM works incorrectly.
The following test demonstrates this issue.
VM crashes or finish its run abnormally.
----------------test.java-------------------
public class test extends Thread {
   public static void main (String[] argv) {
        int N_TH = 5;
        try {
            if (argv.length > 0) {
                N_TH=Integer.parseInt(argv[0]);
            }
        } catch (Throwable e) {
        }
        test t[] = new test[N_TH];
        for (int i = 0; i < N_TH; i++) {
            t[i]=new test();
            t[i].start();
        }
        try {
            for (int i = 0; i < N_TH; i++) {
                t[i].join();
            }
        } catch (Throwable e) {
            System.err.println(e);
        }

        System.out.println("Test passed");
    }
    public void m(int t) {
             m(t+1);
    }

    public void run() {
        System.err.println("Start");
        try {
            m(0);
        } catch (StackOverflowError e) {
        }
    }
}
------------------------------
Run test
java  -cp . test 20

Output:
Sometimes test passes.

Apache Harmony Launcher : (c) Copyright 1991, 2006 The Apache Software Foundation or its l
icensors, as applicable.
java version "1.5.0"
pre-alpha : not complete or compatible
svn = r526746, (Apr 10 2007), Windows/ia32/msvc 1310, release build
http://incubator.apache.org/harmony
Start
...
Start
Test passed

But  usually VM does not report full message and finishes execution or crashes:
Start
Start
Start



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