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malloc: obscure calloc use in tst-calloc

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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
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 <stdio.h>
#include <libc-diag.h> #include <libc-diag.h>
#include "tst-malloc-aux.h"
/* Number of samples per size. */ /* Number of samples per size. */
#define N 50000 #define N 50000
@@ -94,16 +95,19 @@ random_test (void)
static void static void
null_test (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 /* If the size is 0 the result is implementation defined. Just make
sure the program doesn't crash. The result of calloc is sure the program doesn't crash. The result of calloc is
deliberately ignored, so do not warn about that. */ deliberately ignored, so do not warn about that. */
DIAG_PUSH_NEEDS_COMMENT; DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (10, "-Wunused-result"); DIAG_IGNORE_NEEDS_COMMENT (10, "-Wunused-result");
calloc (0, 0); calloc (0, 0);
calloc (0, UINT_MAX); calloc (0, max_size);
calloc (UINT_MAX, 0); calloc (max_size, 0);
calloc (0, ~((size_t) 0)); calloc (0, ~((size_t) zero_size));
calloc (~((size_t) 0), 0); calloc (~((size_t) zero_size), 0);
DIAG_POP_NEEDS_COMMENT; DIAG_POP_NEEDS_COMMENT;
} }