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tests/tcg/multiarch: Improve mutator randomness

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Currently mutators perform the same actions, because the RNG seed is
derived from the current time in seconds. Mix in thread ID.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20260706165445.57418-3-iii@linux.ibm.com>
This commit is contained in:
Ilya Leoshkevich
2026-07-06 18:51:24 +02:00
committed by Richard Henderson
parent e03b7dac65
commit 39678e16e8
1 changed files with 2 additions and 1 deletions
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3
tests/tcg/multiarch/vma-pthread.c
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@@ -11,6 +11,7 @@
* pages, which are guaranteed to have the respective protection bit set.
* Two mutator threads change the non-fixed protection bits randomly.
*/
#define _GNU_SOURCE
#include <assert.h>
#include <fcntl.h>
#include <pthread.h>
@@ -121,7 +122,7 @@ static void *thread_mutate(void *arg)
unsigned int seed;
int prot, ret;
seed = (unsigned int)time(NULL);
seed = (unsigned int)time(NULL) + (unsigned int)gettid();
for (i = 0; i < 10000; i++) {
start_idx = rand_r(&seed) & PAGE_IDX_MASK;
end_idx = rand_r(&seed) & PAGE_IDX_MASK;