diff options
| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2024-03-25 20:23:02 +0100 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2024-03-26 18:20:36 -1000 |
| commit | 889cd5a8e2dd6cf8793faba22fda38b78553ae24 (patch) | |
| tree | 6748d9a6e25efea17938745e708d1055ac82b380 /tests | |
| parent | fa527b44c2d65d48cc3c5ac018dc935cc286f5a9 (diff) | |
tests/tcg: Test shmat(NULL)
Add a small test to prevent regressions.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20240325192436.561154-5-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/tcg/multiarch/linux/linux-shmat-null.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/tests/tcg/multiarch/linux/linux-shmat-null.c b/tests/tcg/multiarch/linux/linux-shmat-null.c new file mode 100644 index 0000000000..94eaaec371 --- /dev/null +++ b/tests/tcg/multiarch/linux/linux-shmat-null.c @@ -0,0 +1,38 @@ +/* + * Test shmat(NULL). + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#include <assert.h> +#include <stdlib.h> +#include <sys/ipc.h> +#include <sys/shm.h> + +int main(void) +{ + int shmid; + char *p; + int err; + + /* Create, attach and intialize shared memory. */ + shmid = shmget(IPC_PRIVATE, 1, IPC_CREAT | 0600); + assert(shmid != -1); + p = shmat(shmid, NULL, 0); + assert(p != (void *)-1); + *p = 42; + + /* Reattach, check that the value is still there. */ + err = shmdt(p); + assert(err == 0); + p = shmat(shmid, NULL, 0); + assert(p != (void *)-1); + assert(*p == 42); + + /* Detach. */ + err = shmdt(p); + assert(err == 0); + err = shmctl(shmid, IPC_RMID, NULL); + assert(err == 0); + + return EXIT_SUCCESS; +} |