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| author | Martin Sebor <msebor@redhat.com> | 2021-04-27 13:01:55 -0600 |
|---|---|---|
| committer | Martin Sebor <msebor@redhat.com> | 2021-04-27 13:01:55 -0600 |
| commit | a1561c3bbe8e72c6e44280d1eb5e529d2da4ecd0 (patch) | |
| tree | e3313210ed99c03771560866bc346355ac308e0e /sysdeps/nptl | |
| parent | 876cdfd154f93a913202fa77ed98e97e66aff9c9 (diff) | |
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Add __attribute_access_none to disable GCC warnings [BZ #27714]
GCC 11 warns when a pointer to an uninitialized object is passed
to a function that takes a const-qualified argument. This is done
on the assumption that most such functions read from the object.
For the rare case of a function that doesn't, GCC 11 extends
attribute access to add a new mode called none.
POSIX pthread_setspecific() is one such rare function that takes
a const void* argument but that doesn't read from the object it
points to. To suppress the -Wmaybe-uninitialized issued by GCC
11 when the address of an uninitialized object is passed to it
(e.g., the result of malloc()), this change #defines
__attr_access_none in cdefs.h and uses the macro on the function
in sysdeps/htl/pthread.h and sysdeps/nptl/pthread.h.
Diffstat (limited to 'sysdeps/nptl')
| -rw-r--r-- | sysdeps/nptl/pthread.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sysdeps/nptl/pthread.h b/sysdeps/nptl/pthread.h index c363552f6c..af0c156c89 100644 --- a/sysdeps/nptl/pthread.h +++ b/sysdeps/nptl/pthread.h @@ -1182,7 +1182,8 @@ extern void *pthread_getspecific (pthread_key_t __key) __THROW; /* Store POINTER in the thread-specific data slot identified by KEY. */ extern int pthread_setspecific (pthread_key_t __key, - const void *__pointer) __THROW ; + const void *__pointer) + __THROW __attr_access_none (2); #ifdef __USE_XOPEN2K |