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malloc: obscure calloc use in tst-calloc 

Similar to a9944a52c9 and
f9493a15ea, we need to hide calloc use from
the compiler to accommodate GCC's r15-6566-g804e9d55d9e54c change.

First, include tst-malloc-aux.h, but then use `volatile` variables
for size.

The test passes without the tst-malloc-aux.h change but IMO we want
it there for consistency and to avoid future problems (possibly silent).

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
This commit is contained in:
Sam James 2025-01-10 03:03:47 +00:00
parent dad44389f2
commit c3d1dac96b
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GPG Key ID: 738409F520DF9190
1 changed files with 8 additions and 4 deletions
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12
malloc/tst-calloc.c
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@ -23,6 +23,7 @@
#include <stdio.h>
#include <libc-diag.h>
#include "tst-malloc-aux.h"
/* Number of samples per size. */
#define N 50000
@ -94,16 +95,19 @@ random_test (void)
static void
null_test (void)
{
/* Obscure allocation size from the compiler. */
volatile size_t max_size = UINT_MAX;
volatile size_t zero_size = 0;
/* If the size is 0 the result is implementation defined. Just make
sure the program doesn't crash. The result of calloc is
deliberately ignored, so do not warn about that. */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (10, "-Wunused-result");
calloc (0, 0);
calloc (0, UINT_MAX);
calloc (UINT_MAX, 0);
calloc (0, ~((size_t) 0));
calloc (~((size_t) 0), 0);
calloc (0, max_size);
calloc (max_size, 0);
calloc (0, ~((size_t) zero_size));
calloc (~((size_t) zero_size), 0);
DIAG_POP_NEEDS_COMMENT;
}