i386/113338: GNU gcc __thread as class member

[Nathan Bates]

>Number:         113338
>Category:       i386
>Synopsis:       GNU gcc __thread as class member
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jun 04 17:10:02 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator:     Nathan Bates
>Release:        6.2
>Organization:
>Environment:
FreeBSD amd64.intra.net 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Fri Jan 12 11:05:30 UTC 2007     root at dessler.cse.buffalo.edu:/usr/obj/usr/src/sys/SMP  i386

>Description:
This pertains to GNU gcc Thread Local Storage.
http://gcc.gnu.org/onlinedocs/gcc-3.4.6/gcc/Thread_002dLocal.html#Thread_002dLocal

The storage class specifier "__thread" malfunctions
if the thread-local variable is a C++ static class member.
The variable apparently had a garbage value.
The same code works ok on Linux.

It will work ok on FreeBSD as an ordinary global variable (C extern linkage).

I used g++ 3.4.6 on FreeBSD 6.2.

>How-To-Repeat:
Write pthreads code where two threads
access a static class member in Thread Local Storage.

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: