Fix: handle sys_futex EINTR and EWOULDBLOCK

[deliverable/lttng-ust.git] / tests / ust-multi-test / ust-multi-test.c

diff --git a/tests/ust-multi-test/ust-multi-test.c b/tests/ust-multi-test/ust-multi-test.c
index 6f277a2176f28e016be2588c875ea8065e1e7829..c003c5a93f0f00bf033be2a54cccd7015b7996f5 100644 (file)
--- a/tests/ust-multi-test/ust-multi-test.c
+++ b/tests/ust-multi-test/ust-multi-test.c
@@ -638,11 +638,15 @@ error:
 
 int update_futex(int fd, int active)
 {
-       size_t mmap_size = sysconf(_SC_PAGE_SIZE);
+       long page_size;
        char *wait_shm_mmap;
        int ret;
 
-       wait_shm_mmap = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
+       page_size = sysconf(_SC_PAGE_SIZE);
+       if (page_size < 0) {
+               goto error;
+       }
+       wait_shm_mmap = mmap(NULL, page_size, PROT_READ | PROT_WRITE,
                  MAP_SHARED, fd, 0);
        if (wait_shm_mmap == MAP_FAILED) {
                perror("mmap");
@@ -651,12 +655,15 @@ int update_futex(int fd, int active)
 
        if (active) {
                uatomic_set((int32_t *) wait_shm_mmap, 1);
-               futex_async((int32_t *) wait_shm_mmap, FUTEX_WAKE,
-                               INT_MAX, NULL, NULL, 0);
+               if (futex_async((int32_t *) wait_shm_mmap, FUTEX_WAKE,
+                               INT_MAX, NULL, NULL, 0) < 0) {
+                       perror("futex_async");
+                       goto error;
+               }
        } else {
                uatomic_set((int32_t *) wait_shm_mmap, 0);
        }
-       ret = munmap(wait_shm_mmap, mmap_size);
+       ret = munmap(wait_shm_mmap, page_size);
        if (ret) {
                perror("Error unmapping wait shm");
                goto error;