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cleanup use of visibility attributes in pthread_cancel.c

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applying the attribute to a weak_alias macro was a hack. instead use a
separate declaration to apply the visibility, and consolidate
declarations together to avoid having visibility mess all over the
file.
This commit is contained in:
Rich Felker 2015-04-14 13:49:05 -04:00
parent 7405cd1e2b
commit 9c738dc183
1 changed files with 9 additions and 8 deletions
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17
src/thread/pthread_cancel.c
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@ -4,12 +4,11 @@
#include "libc.h"
#ifdef SHARED
#define hidden __attribute__((__visibility__("hidden")))
#else
#define hidden
__attribute__((__visibility__("hidden")))
#endif
long __cancel(), __cp_cancel(), __syscall_cp_asm(), __syscall_cp_c();
hidden long __cancel()
long __cancel()
{
pthread_t self = __pthread_self();
if (self->canceldisable == PTHREAD_CANCEL_ENABLE || self->cancelasync)
@ -22,14 +21,12 @@ hidden long __cancel()
* definition of __cp_cancel to undo those adjustments and call __cancel.
* Otherwise, __cancel provides a definition for __cp_cancel. */
hidden weak_alias(__cancel, __cp_cancel);
weak_alias(__cancel, __cp_cancel);
hidden
long __syscall_cp_asm(volatile void *, syscall_arg_t,
syscall_arg_t, syscall_arg_t, syscall_arg_t,
syscall_arg_t, syscall_arg_t, syscall_arg_t);
hidden
long __syscall_cp_c(syscall_arg_t nr,
syscall_arg_t u, syscall_arg_t v, syscall_arg_t w,
syscall_arg_t x, syscall_arg_t y, syscall_arg_t z)
@ -55,12 +52,16 @@ static void _sigaddset(sigset_t *set, int sig)
set->__bits[s/8/sizeof *set->__bits] |= 1UL<<(s&8*sizeof *set->__bits-1);
}
#ifdef SHARED
__attribute__((__visibility__("hidden")))
#endif
extern const char __cp_begin[1], __cp_end[1];
static void cancel_handler(int sig, siginfo_t *si, void *ctx)
{
pthread_t self = __pthread_self();
ucontext_t *uc = ctx;
const char *ip = ((char **)&uc->uc_mcontext)[CANCEL_REG_IP];
hidden extern const char __cp_begin[1], __cp_end[1];
a_barrier();
if (!self->cancel || self->canceldisable == PTHREAD_CANCEL_DISABLE) return;