[Bug c/26461] New: liveness of thread local references across function calls

[yichen dot xie at gmail dot com]

I ran into this problem with stock gcc-4.0.2 on Fedora Core 2. The problem
shows when the following code is compiled with -O2: the address of "array"
seems to be cached and reused across calls to function "h". This becomes a
problem when function h saves its execution context in one thread and resumes
in another thread (thus the address of array changes before and after the
call). Is this a feature or a bug? How could I instruct gcc not to reuse thread
local addresses acrosses function calls? Thanks.

__thread int array[1];
int *f()
{
    for (;;)
        h(array);
    return array;
}


-- 
           Summary: liveness of thread local references across function
                    calls
           Product: gcc
           Version: 4.0.2
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: yichen dot xie at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26461