[DragonFlyBSD - Bug #2372] segfault correct detection failure

[John Marino via Redmine]

Issue #2372 has been reported by John Marino.

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Bug #2372: segfault correct detection failure
http://bugs.dragonflybsd.org/issues/2372

Author: John Marino
Status: New
Priority: Normal
Assignee: 
Category: 
Target version: 


The package devel/libsigsegv fails its final diagnostic test on DragonFly.
For information, this does pass on FreeBSD 9.

To repeat:
> cd /usr/pkgsrc/devel/libsigsegv
> bmake
> cd ${WRKOBJDIR}/devel/libsigsegv/work/libsigsegv-2.10/
> gmake check

The output of the fifth test (out of five) should be:
| Starting recursion pass 1.
| Stack overflow 1 caught.
| Starting recursion pass 2.
| Stack overflow 2 caught.
| Segmentation violation correctly detected.
| Segmentation violation correctly detected.
| Test passed.
| PASS: stackoverflow2

The actual output is:
| Starting recursion pass 1.
| Stack overflow 1 caught.
| Starting recursion pass 2.
| Stack overflow 2 caught.
| Segmentation violation misdetected as stack overflow.
| Test passed.
| FAIL: stackoverflow2

The code of the test is here: 
http://fossies.org/dox/libsigsegv-2.10/stackoverflow2_8c_source.html

What seems to be happening is that when the stack is exhausted, accessing an illegal memory location triggers the stack overflow handler before the sigsegv handler.  I think it's a DragonFly bug.


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