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| author | Florian Weimer <fweimer@redhat.com> | 2021-03-02 10:49:03 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2021-03-02 11:56:33 +0100 |
| commit | e81402f246f53072aa799bfee101bf02d561a8c1 (patch) | |
| tree | 03ca0baa9cc3e1cb43bf12d8e7bbe83b69755d49 /sysdeps | |
| parent | e7b2a56192d6852f0a6656b8e1cd8fe23f91d89c (diff) | |
| download | glibc-e81402f246f53072aa799bfee101bf02d561a8c1.tar.gz glibc-e81402f246f53072aa799bfee101bf02d561a8c1.tar.xz glibc-e81402f246f53072aa799bfee101bf02d561a8c1.zip | |
nptl: __libc_cleanup_push/__libc_cleanup_pop require -fexceptions
Do not define these macros if they do nothing in a particular compilation, otherwise they can easily be used accidentally, while not actually achieving anything.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/nptl/libc-lockP.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/sysdeps/nptl/libc-lockP.h b/sysdeps/nptl/libc-lockP.h index 0f74d783fe..4a0b96e6d9 100644 --- a/sysdeps/nptl/libc-lockP.h +++ b/sysdeps/nptl/libc-lockP.h @@ -271,6 +271,9 @@ extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer } else if (DOIT) \ _buffer.__routine (_buffer.__arg) +/* __libc_cleanup_push and __libc_cleanup_pop depend on exception + handling and stack unwinding. */ +#ifdef __EXCEPTIONS /* Normal cleanup handling, based on C cleanup attribute. */ __extern_inline void @@ -280,17 +283,17 @@ __libc_cleanup_routine (struct __pthread_cleanup_frame *f) f->__cancel_routine (f->__cancel_arg); } -#define __libc_cleanup_push(fct, arg) \ +# define __libc_cleanup_push(fct, arg) \ do { \ struct __pthread_cleanup_frame __clframe \ __attribute__ ((__cleanup__ (__libc_cleanup_routine))) \ = { .__cancel_routine = (fct), .__cancel_arg = (arg), \ .__do_it = 1 }; -#define __libc_cleanup_pop(execute) \ +# define __libc_cleanup_pop(execute) \ __clframe.__do_it = (execute); \ } while (0) - +#endif /* __EXCEPTIONS */ /* Create thread-specific key. */ #define __libc_key_create(KEY, DESTRUCTOR) \ |