Commit 21ceba88 authored by Jim Harris's avatar Jim Harris Committed by Daniel Verkamp
Browse files

app/trace: exit if shm mmap fails 



Signed-off-by: default avatarJim Harris <james.r.harris@intel.com>
Change-Id: Icbe76cafddf5bd1e457c87e8241e68cb18a044dd
parent 57986fb8

app/trace/trace.cpp

+8 −0
Original line number Diff line number Diff line
@@ -360,13 +360,21 @@ int main(int argc, char **argv) 
	} else {

		snprintf(shm_name, sizeof(shm_name), "/%s_trace.pid%d", app_name, shm_pid);

	}



	fd = shm_open(shm_name, O_RDONLY, 0600);

	if (fd < 0) {

		fprintf(stderr, "Could not open shm %s.\n", shm_name);

		usage();

		exit(-1);

	}



	history_ptr = mmap(NULL, sizeof(*g_histories), PROT_READ, MAP_SHARED, fd, 0);

	if (history_ptr == MAP_FAILED) {

		fprintf(stderr, "Could not mmap shm %s.\n", shm_name);

		usage();

		exit(-1);

	}



	g_histories = (struct spdk_trace_histories *)history_ptr;



	tsc_rate = g_histories->tsc_rate;