Implement detailed syscall event probe

[lttng-modules.git] / ltt-debugfs-abi.c

diff --git a/ltt-debugfs-abi.c b/ltt-debugfs-abi.c
index 0b8a60a2698d7901e6c86c4f391149f6d5225098..81afdbdbae28f13459fc84f9e3ed7dbe97137945 100644 (file)
--- a/ltt-debugfs-abi.c
+++ b/ltt-debugfs-abi.c
@@ -514,31 +514,41 @@ int lttng_abi_create_event(struct file *channel_file,
        default:
                break;
        }
-       event_fd = get_unused_fd();
-       if (event_fd < 0) {
-               ret = event_fd;
-               goto fd_error;
-       }
-       event_file = anon_inode_getfile("[lttng_event]",
-                                       &lttng_event_fops,
-                                       NULL, O_RDWR);
-       if (IS_ERR(event_file)) {
-               ret = PTR_ERR(event_file);
-               goto file_error;
-       }
-       /*
-        * We tolerate no failure path after event creation. It will stay
-        * invariant for the rest of the session.
-        */
-       event = ltt_event_create(channel, &event_param, NULL);
-       if (!event) {
-               ret = -EINVAL;
-               goto event_error;
+       switch (event_param.instrumentation) {
+       default:
+               event_fd = get_unused_fd();
+               if (event_fd < 0) {
+                       ret = event_fd;
+                       goto fd_error;
+               }
+               event_file = anon_inode_getfile("[lttng_event]",
+                                               &lttng_event_fops,
+                                               NULL, O_RDWR);
+               if (IS_ERR(event_file)) {
+                       ret = PTR_ERR(event_file);
+                       goto file_error;
+               }
+               /*
+                * We tolerate no failure path after event creation. It
+                * will stay invariant for the rest of the session.
+                */
+               event = ltt_event_create(channel, &event_param, NULL);
+               if (!event) {
+                       ret = -EINVAL;
+                       goto event_error;
+               }
+               event_file->private_data = event;
+               fd_install(event_fd, event_file);
+               /* The event holds a reference on the channel */
+               atomic_long_inc(&channel_file->f_count);
+               break;
+       case LTTNG_KERNEL_SYSCALLS:
+               ret = lttng_syscalls_register(channel, NULL);
+               if (ret)
+                       goto fd_error;
+               event_fd = 0;
+               break;
        }
-       event_file->private_data = event;
-       fd_install(event_fd, event_file);
-       /* The event holds a reference on the channel */
-       atomic_long_inc(&channel_file->f_count);
        return event_fd;
 
 event_error: