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Remove incorrect alloc_size attribute from pvalloc [BZ #25401]

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pvalloc is guarantueed to round up the allocation size to the page
size, so applications can assume that the memory region is larger
than the passed-in argument.  The alloc_size attribute cannot express
that.

The test case is based on a suggestion from Jakub Jelinek.

This fixes commit 9bf8e29ca1 ("malloc:
make malloc fail with requests larger than PTRDIFF_MAX (BZ#23741)").

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
2020-01-17 15:05:34 +01:00
parent 70ba28f7ab
commit 768c83b7f6
3 changed files with 50 additions and 3 deletions
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3
malloc/malloc.h
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@ -71,8 +71,7 @@ extern void *valloc (size_t __size) __THROW __attribute_malloc__
/* Equivalent to valloc(minimum-page-that-holds(n)), that is, round up
__size to nearest pagesize. */
extern void *pvalloc (size_t __size) __THROW __attribute_malloc__
__attribute_alloc_size__ ((1)) __wur;
extern void *pvalloc (size_t __size) __THROW __attribute_malloc__ __wur;
/* Underlying allocation function; successive calls should return
contiguous pieces of memory. */