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Re: [user] segfault w/ error 4

From: "U.Mutlu" <for-gmane at mutluit dot com>
To: libstdc++ at gcc dot gnu dot org
Date: Tue, 11 Sep 2012 07:16:33 +0200
Subject: Re: [user] segfault w/ error 4
References: <k2mgtj$73s$1@ger.gmane.org>

U.Mutlu wrote, On 09/11/2012 07:06 AM:

[user question]
Hi,
recently a server daemon program suddenly started repeatedly crashing. syslog says:
  segfault at 7f6d003d5453 ip 00007f6d49c9dd6d sp 00007f6d469c1b60 error 4 in
libstdc++.so.6.0.17[7f6d49bff000+e8000]
What does "error 4" mean? Is this documented somewhere?

Is this an application error or rather an error in libstdc++.so ?

The error is not always repeatable, ie. happens occasionally, reason unknown yet.

What's the easiest method to locate the bug in this server daemon pgm?

Thx

Additional info:

The error happens only with the 64-bit version of the system library on multicore systems (amd64).
On 32bit-multicore-systems the error doesn't happen.

References:
- [user] segfault w/ error 4
  - From: U.Mutlu

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