Hi,
I'm trying to run a Java application in my 64-bit UML. Unfortunately I have
experienced a lot of SIGSEGV's when running my application which makes it next
to unusable (it crashes maybe 80% of the time). The only way I have found to
make the SIGSEGV's go away has been to disable the Java HotSpot compiler
completely (running my application in interpreted mode).
However, in interpreted mode I have observed other strange Java exception
problems, which I have never seen when running my application outside the UML.
After a lot of googling I have found a small test program ("Test.java") which
can easily provoke the problem (at least when run in interpreted mode).
The original test program can be found here:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4832371
I have tried the test program on a few other hosts and OS:s (Linux, Windows and
also VirtualBox and XEN Linux instances) but still haven't seen it fail outside
the UML.
My UML is running on Red Hat Enterprise Linux Server release 5.4 (Tikanga).
uml-22-241>uname -aLinux uml-22-241 2.6.37 #1 Fri Apr 8 11:03:19 CEST 2011
x86_64 GNU/Linux
The test program is started like this:
uml-22-241>/rhel5.x86_64/java/jdk1.6.0_23/bin/java -cp /tmp/
-Djava.compiler=NONE Test
Here's the small test program, repeated for convenience:
public class Test implements Runnable { int n;
public Test(int i) { n = i; }
public static void main(String args[]) { for (int i = 0; i < 100; i++) {
Thread t = new Thread(new Test(i)); t.start(); } }
public void run() { long i = 0; while (true) { Test2 test = new
Test2(); i++; if (i % 100000 == 0) System.out.print('.'); }
}}
public class Test2 { float lf;
public Test2() { this(11, 0.75f); }
public Test2(int x, float f) { if (f <= 0 || Float.isNaN(f))
System.out.println(f + " < 0 "); this.lf = f; }}
Any help or suggestion about how to solve this problem is much appreciated!
//Gunnar ------------------------------------------------------------------------------
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