From 455b289973f7df350ea179c7eb8bfed0c766ec40 Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Sat, 1 Jun 2019 00:17:06 +0900 Subject: tracing/probe: Add trace_probe init and free functions Add common trace_probe init and cleanup function in trace_probe.c, and use it from trace_kprobe.c and trace_uprobe.c Link: http://lkml.kernel.org/r/155931582664.28323.5934870189034740822.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/trace_probe.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) (limited to 'kernel/trace/trace_probe.c') diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index b6b0593844cd..fe4ee2e73d92 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -884,3 +884,39 @@ int traceprobe_define_arg_fields(struct trace_event_call *event_call, } return 0; } + + +void trace_probe_cleanup(struct trace_probe *tp) +{ + int i; + + for (i = 0; i < tp->nr_args; i++) + traceprobe_free_probe_arg(&tp->args[i]); + + kfree(tp->call.class->system); + kfree(tp->call.name); + kfree(tp->call.print_fmt); +} + +int trace_probe_init(struct trace_probe *tp, const char *event, + const char *group) +{ + if (!event || !group) + return -EINVAL; + + tp->call.class = &tp->class; + tp->call.name = kstrdup(event, GFP_KERNEL); + if (!tp->call.name) + return -ENOMEM; + + tp->class.system = kstrdup(group, GFP_KERNEL); + if (!tp->class.system) { + kfree(tp->call.name); + tp->call.name = NULL; + return -ENOMEM; + } + INIT_LIST_HEAD(&tp->files); + INIT_LIST_HEAD(&tp->class.fields); + + return 0; +} -- cgit v1.2.3