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Remove macros extend_alloca, extend_alloca_account [BZ #18023]

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The unused macro definition in posix/glob.c comes from gnulib and will
have to be removed there.
This commit is contained in:
Florian Weimer
2018-06-27 18:39:05 +02:00
parent a833e627c3
commit c49e18222e
3 changed files with 7 additions and 41 deletions
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40
include/alloca.h
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@@ -23,57 +23,17 @@ libc_hidden_proto (__libc_alloca_cutoff)
#include <allocalim.h>
#ifndef stackinfo_alloca_round
# define stackinfo_alloca_round(l) (((l) + 15) & -16)
#endif
#if _STACK_GROWS_DOWN
# define extend_alloca(buf, len, newlen) \
(__typeof (buf)) ({ size_t __newlen = stackinfo_alloca_round (newlen); \
char *__newbuf = __alloca (__newlen); \
if (__newbuf + __newlen == (char *) (buf)) \
len += __newlen; \
else \
len = __newlen; \
__newbuf; })
#elif _STACK_GROWS_UP
# define extend_alloca(buf, len, newlen) \
(__typeof (buf)) ({ size_t __newlen = stackinfo_alloca_round (newlen); \
char *__newbuf = __alloca (__newlen); \
char *__buf = (char *) (buf); \
if (__buf + len == __newbuf) \
{ \
len += __newlen; \
__newbuf = __buf; \
} \
else \
len = __newlen; \
__newbuf; })
#else
# define extend_alloca(buf, len, newlen) \
__alloca (((len) = (newlen)))
#endif
#if defined stackinfo_get_sp && defined stackinfo_sub_sp
# define alloca_account(size, avar) \
({ void *old__ = stackinfo_get_sp (); \
void *m__ = __alloca (size); \
avar += stackinfo_sub_sp (old__); \
m__; })
# define extend_alloca_account(buf, len, newlen, avar) \
({ void *old__ = stackinfo_get_sp (); \
void *m__ = extend_alloca (buf, len, newlen); \
avar += stackinfo_sub_sp (old__); \
m__; })
#else
# define alloca_account(size, avar) \
({ size_t s__ = (size); \
avar += s__; \
__alloca (s__); })
# define extend_alloca_account(buf, len, newlen, avar) \
({ size_t s__ = (newlen); \
avar += s__; \
extend_alloca (buf, len, s__); })
#endif
# endif /* !_ISOMAC */