X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=tests%2Fust-basic-tracing%2Fust-basic-tracing.c;h=e9b9ea6d17a5697e640d5ae7f3a18bdb1ba9effd;hb=fb31eb73d8a4a6d9784ed5c335b7fa3b9684108c;hp=7bfeb5bc540f7037a15a8a61976f0a2ebbfcc2ef;hpb=172d6b687981b2606a5ad9caffba5686be96ff28;p=lttng-ust.git

diff --git a/tests/ust-basic-tracing/ust-basic-tracing.c b/tests/ust-basic-tracing/ust-basic-tracing.c
index 7bfeb5bc..e9b9ea6d 100644
--- a/tests/ust-basic-tracing/ust-basic-tracing.c
+++ b/tests/ust-basic-tracing/ust-basic-tracing.c
@@ -20,24 +20,25 @@
 
 #define _LARGEFILE64_SOURCE
 #define _GNU_SOURCE
+#include <assert.h>
 #include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <signal.h>
-#include <unistd.h>
-#include <sys/wait.h>
-#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/resource.h>
+#include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/time.h>
-#include <sys/resource.h>
-#include <fcntl.h>
-#include <sys/mman.h>
-#include <limits.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
 #include <urcu/futex.h>
 #include <urcu/uatomic.h>
-#include <assert.h>
-#include <sys/socket.h>
 
 #include <ust-comm.h>
 #include <lttng/ust-error.h>
@@ -647,7 +648,11 @@ int update_futex(int fd, int active)
 	int ret;
 
 	page_size = sysconf(_SC_PAGE_SIZE);
-	if (page_size < 0) {
+	if (page_size <= 0) {
+		if (!page_size) {
+			errno = EINVAL;
+		}
+		perror("Error in sysconf(_SC_PAGE_SIZE)");
 		goto error;
 	}
 	wait_shm_mmap = mmap(NULL, page_size, PROT_READ | PROT_WRITE,
@@ -659,8 +664,11 @@ 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);
 	}
@@ -714,6 +722,7 @@ int main(int argc, const char **argv)
 	const char *outputpath;
 	const char **event_names;
 	unsigned int nr_events;
+	long page_size;
 
 	if (argc < 2) {
 		printf("Usage:\n");
@@ -756,6 +765,15 @@ int main(int argc, const char **argv)
 		return -1;
 	}
 
+	page_size = sysconf(_SC_PAGE_SIZE);
+	if (page_size <= 0) {
+		if (!page_size) {
+			errno = EINVAL;
+		}
+		perror("Error in sysconf(_SC_PAGE_SIZE)");
+		return -1;
+	}
+
 	if (geteuid() == 0) {
 		ret = mkdir(LTTNG_RUNDIR, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
 		if (ret && errno != EEXIST) {
@@ -763,7 +781,7 @@ int main(int argc, const char **argv)
 			return -1;
 		}
 		wait_shm_fd = get_wait_shm(DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH,
-					sysconf(_SC_PAGE_SIZE), 1);
+					page_size, 1);
 		if (wait_shm_fd < 0) {
 			perror("global wait shm error");
 			return -1;
@@ -789,7 +807,7 @@ int main(int argc, const char **argv)
 		snprintf(local_apps_wait_shm_path, PATH_MAX,
 			 DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid());
 		wait_shm_fd = get_wait_shm(local_apps_wait_shm_path,
-					sysconf(_SC_PAGE_SIZE), 0);
+					page_size, 0);
 		if (wait_shm_fd < 0) {
 			perror("local wait shm error");
 			return -1;