[jira] Commented: (HARMONY-4873) [drlvm][exception] NullPointerException causes SIGSEGV

["Mikhail Fursov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HARMONY-4873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12532125 ] 

Mikhail Fursov commented on HARMONY-4873:
-----------------------------------------

I found that the reason of failure is:

[r572671] Applied patch from HARMONY-4407 [drlvm][stack]One page on the stack is
not enough to create SOE on Windows x86-64. Additionally 2 kernel
tests excluded on win64 on interpreter because of HARMONY-4733




The failure is not reproduced if you rollback 1 file:

svn update -r 572291 vm/vmcore/src/exception/exceptions_jit.cpp



Note: if you start to rollback commits one by one from the current date you will find that regression was introduced by
[r575666] Fix for HARMONY-4702 [drlvm][jit] DRLVM is able to run SjAS in server

this is not true, because this commit only changed the way NPE was handled in JET for the failing test: instead of software NPE handling this commit enables hardware handling. 



> [drlvm][exception] NullPointerException causes SIGSEGV
> ------------------------------------------------------
>
>                 Key: HARMONY-4873
>                 URL: https://issues.apache.org/jira/browse/HARMONY-4873
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>         Environment: Debian Linux IA32
>            Reporter: Alexei Zakharov
>
> The following innocent test causes segmentation fault if executed on DRLVM. However, it passes ok on RI and J9.
> Test113.java
> ---
> import java.io.*;
> public class Test113 {
>    static class A implements Serializable {
>        private final byte[] encoding = null;
>        protected A() {}
>        protected Object writeReplace() {
>            return new String(encoding.clone());
>        }
>    }
>    public static void main(String argv[]) throws Exception {
>        ByteArrayOutputStream out = new ByteArrayOutputStream();
>        ObjectOutputStream oos = new ObjectOutputStream(out);
>        A a = new A();
>        for (int i = 0; i < 2; i++) {
>           try {
>               System.out.println("ITERATION " + i);
>               oos.writeObject(a);
>           } catch (NullPointerException e) {
>               System.out.println("NPE catched");
>           }
>        }
>        System.out.println("PASS");
>    }
> }
> ---

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