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nptl: __libc_cleanup_push/__libc_cleanup_pop require -fexceptions

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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.
This commit is contained in:
Florian Weimer 2021-03-02 10:49:03 +01:00
parent e7b2a56192
commit e81402f246
1 changed files with 6 additions and 3 deletions
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9
sysdeps/nptl/libc-lockP.h
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@ -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) \