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xmalloc: calling xrealloc() or xreallocarray() with a 0-size is UB in C23

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And likely to in future POSIX too.
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Daniel Eklöf 2025-02-03 08:31:31 +01:00
parent ab4426f987
commit f718cb3fb0
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1 changed files with 4 additions and 2 deletions
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6
xmalloc.c
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@ -32,15 +32,17 @@ xcalloc(size_t nmemb, size_t size)
void *
xrealloc(void *ptr, size_t size)
{
xassert(size != 0);
void *alloc = realloc(ptr, size);
return unlikely(size == 0) ? alloc : check_alloc(alloc);
return check_alloc(alloc);
}
void *
xreallocarray(void *ptr, size_t n, size_t size)
{
xassert(n != 0 && size != 0);
void *alloc = reallocarray(ptr, n, size);
return unlikely(size == 0) ? alloc : check_alloc(alloc);
return check_alloc(alloc);
}
char *