Add syscall listing support

[lttng-tools.git] / src / lib / lttng-ctl / lttng-ctl.c

diff --git a/src/lib/lttng-ctl/lttng-ctl.c b/src/lib/lttng-ctl/lttng-ctl.c
index a398e34d6d7b3c825bb8e4a4e0802412ae96e83f..ff57a0d1a7a70237e396274b8a4847f1194beb3d 100644 (file)
--- a/src/lib/lttng-ctl/lttng-ctl.c
+++ b/src/lib/lttng-ctl/lttng-ctl.c
@@ -1323,6 +1323,35 @@ int lttng_list_tracepoint_fields(struct lttng_handle *handle,
        return ret / sizeof(struct lttng_event_field);
 }
 
+/*
+ *  Lists all available kernel system calls. Allocates and sets the contents of
+ *  the events array.
+ *
+ *  Returns the number of lttng_event entries in events; on error, returns a
+ *  negative value.
+ */
+int lttng_list_syscalls(struct lttng_event **events)
+{
+       int ret;
+       struct lttcomm_session_msg lsm;
+
+       if (!events) {
+               return -LTTNG_ERR_INVALID;
+       }
+
+       memset(&lsm, 0, sizeof(lsm));
+       lsm.cmd_type = LTTNG_LIST_SYSCALLS;
+       /* Force kernel domain for system calls. */
+       lsm.domain.type = LTTNG_DOMAIN_KERNEL;
+
+       ret = lttng_ctl_ask_sessiond(&lsm, (void **) events);
+       if (ret < 0) {
+               return ret;
+       }
+
+       return ret / sizeof(struct lttng_event);
+}
+
 /*
  *  Returns a human readable string describing
  *  the error code (a negative value).