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87 lines
2.2 KiB
87 lines
2.2 KiB
1 month ago
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commit 9a27b566b2048f599048f2f4afe1cce06c4ef43d
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Author: Miguel Martín <mmartinv@redhat.com>
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Date: Tue Jul 16 17:14:56 2024 +0200
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malloc: avoid global locks in tst-aligned_alloc-lib.c
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Make sure the DSO used by aligned_alloc/calloc/malloc tests does not get
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a global lock on multithreaded tests.
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Reviewed-by: Arjun Shankar <arjun@redhat.com>
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diff --git a/malloc/tst-aligned_alloc-lib.c b/malloc/tst-aligned_alloc-lib.c
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index 0205df5acf6297a5..9ef1f839c101a6ae 100644
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--- a/malloc/tst-aligned_alloc-lib.c
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+++ b/malloc/tst-aligned_alloc-lib.c
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@@ -17,37 +17,38 @@
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <https://www.gnu.org/licenses/>. */
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-#include <array_length.h>
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#include <libc-symbols.h>
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#include <stdlib.h>
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+#include <time.h>
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extern void *__libc_malloc (size_t size);
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extern void *__libc_calloc (size_t n, size_t size);
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+__thread unsigned int seed = 0;
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+
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int aligned_alloc_count = 0;
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int libc_malloc_count = 0;
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int libc_calloc_count = 0;
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-/* Get a random alignment value. Biased towards the smaller values. Must be
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- a power of 2. */
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-static size_t get_random_alignment (void)
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-{
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- size_t aligns[] = {
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- 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384
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- };
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-
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- return aligns[random () % array_length (aligns)];
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-}
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-
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-static void *get_random_alloc (size_t size)
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+static void *
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+get_random_alloc (size_t size)
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{
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void *retval;
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size_t align;
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+ struct timespec tp;
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+
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+ if (seed == 0)
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+ {
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+ clock_gettime (CLOCK_REALTIME, &tp);
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+ seed = tp.tv_nsec;
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+ }
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- switch (random() % 3)
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- {
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+ switch (rand_r (&seed) % 3)
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+ {
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case 1:
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- align = get_random_alignment ();
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+ /* Get a random alignment value. Biased towards the smaller
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+ * values up to 16384. Must be a power of 2. */
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+ align = 1 << rand_r (&seed) % 15;
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retval = aligned_alloc (align, size);
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aligned_alloc_count++;
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break;
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@@ -59,13 +60,13 @@ static void *get_random_alloc (size_t size)
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retval = __libc_malloc (size);
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libc_malloc_count++;
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break;
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- }
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+ }
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return retval;
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}
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-
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-void * __random_malloc (size_t size)
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+void *
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+__random_malloc (size_t size)
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{
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return get_random_alloc (size);
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}
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