c++/3082: C++ EH is broken for multithreaded programs

[ljrittle@acm.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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