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Harmonize generic stdio-lock support with nptl

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This fixes build when _IO_funlockfile is a macro, fixes build where
	_IO_acquire_lock_clear_flags2 is used, and fixes unlocking on unexpected
	stack unwind.

	* sysdeps/generic/stdio-lock.h [__EXCEPTIONS] (_IO_acquire_lock,
	_IO_release_lock ): Use cleanup attribute on new
	_IO_acquire_lock_file variable instead of assuming that
	_IO_release_lock will be called.
	[!__EXCEPTIONS] (_IO_acquire_lock): Define to non-existing
	_IO_acquire_lock_needs_exceptions_enabled.
	(_IO_acquire_lock_clear_flags2): New macro.
This commit is contained in:
Samuel Thibault 2015-12-22 14:39:19 +01:00
parent 661a29a518
commit 2cf3e1aa74
2 changed files with 35 additions and 6 deletions
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16
ChangeLog
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@ -1,3 +1,19 @@
2015-12-22 Samuel Thibault <samuel.thibault@ens-lyon.org>
Harmonize generic stdio-lock support with nptl
This fixes build when _IO_funlockfile is a macro, fixes build where
_IO_acquire_lock_clear_flags2 is used, and fixes unlocking on unexpected
stack unwind.
* sysdeps/generic/stdio-lock.h [__EXCEPTIONS] (_IO_acquire_lock,
_IO_release_lock ): Use cleanup attribute on new
_IO_acquire_lock_file variable instead of assuming that
_IO_release_lock will be called.
[!__EXCEPTIONS] (_IO_acquire_lock): Define to non-existing
_IO_acquire_lock_needs_exceptions_enabled.
(_IO_acquire_lock_clear_flags2): New macro.
2015-12-22 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/powerpc/fpu/libm-test-ulps: Regenerated.

25
sysdeps/generic/stdio-lock.h
View File

@ -45,13 +45,26 @@ __libc_lock_define_recursive (typedef, _IO_lock_t)
__libc_cleanup_region_end (_doit)
#if defined _LIBC && IS_IN (libc)
# define _IO_acquire_lock(_fp) \
_IO_cleanup_region_start ((void (*) (void *)) _IO_funlockfile, (_fp)); \
_IO_flockfile (_fp)
# define _IO_release_lock(_fp) \
_IO_funlockfile (_fp); \
_IO_cleanup_region_end (0)
# ifdef __EXCEPTIONS
# define _IO_acquire_lock(_fp) \
do { \
_IO_FILE *_IO_acquire_lock_file \
__attribute__((cleanup (_IO_acquire_lock_fct))) \
= (_fp); \
_IO_flockfile (_IO_acquire_lock_file);
# define _IO_acquire_lock_clear_flags2(_fp) \
do { \
_IO_FILE *_IO_acquire_lock_file \
__attribute__((cleanup (_IO_acquire_lock_clear_flags2_fct))) \
= (_fp); \
_IO_flockfile (_IO_acquire_lock_file);
# else
# define _IO_acquire_lock(_fp) _IO_acquire_lock_needs_exceptions_enabled
# define _IO_acquire_lock_clear_flags2(_fp) _IO_acquire_lock (_fp)
# endif
# define _IO_release_lock(_fp) ; } while (0)
#endif
#endif /* stdio-lock.h */