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c++/3082: C++ EH is broken for multithreaded programs
- To: gcc-gnats at gcc dot gnu dot org
- Subject: c++/3082: C++ EH is broken for multithreaded programs
- From: ljrittle at acm dot org
- Date: 8 Jun 2001 07:40:07 -0000
- Reply-To: ljrittle at acm dot org
>Number: 3082
>Category: c++
>Synopsis: C++ EH is broken for multithreaded programs
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Fri Jun 08 00:46:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: ljrittle@acm.org
>Release: unknown-1.0
>Organization:
>Environment:
*-*-linux, *-*-freebsd, others
>Description:
Memory used to hold state for EH processing is shared
across threads due to a configuration error introduced
when C++ EH code was moved from gcc/libgcc2.c to
libstdc++-v3/libsupc++.
This bug has been reported a few times on gcc-bugs.
The attached test case was taken from (cleaned up
only slightly):
http://gcc.gnu.org/ml/gcc-bugs/2001-05/msg00855.html
dave@hiauly1.hia.nrc.ca also reported this problem with
an initial patch to libstdc++-v3.
>How-To-Repeat:
The lack of using thread-specific memory produces
non-deterministic failures. However, the non-portable
(to non-POSIX hosts) code attached will surely crash
after some amount of time.
>Fix:
Patch posted to libstdc++-v3, gcc-patches and installed on
mainline.
>Release-Note:
>Audit-Trail:
>Unformatted:
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