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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2019-06-01 00:16:46 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-07-16 15:14:47 -0400 |
| commit | f730e0f2da4d0035775ab3c85757fee37bb9cbbe (patch) | |
| tree | 5ba63e966c7b2dc3b06fd54516a29fb9cc3ab716 /kernel | |
| parent | 65fc965c708c90b8c8b2cea980db0618333dd7fe (diff) | |
| download | linux-f730e0f2da4d0035775ab3c85757fee37bb9cbbe.tar.gz linux-f730e0f2da4d0035775ab3c85757fee37bb9cbbe.tar.bz2 linux-f730e0f2da4d0035775ab3c85757fee37bb9cbbe.zip | |
tracing/kprobe: Set print format right after parsed command
Set event call's print format right after parsed command for
simplifying (un)register_kprobe_event().
Link: http://lkml.kernel.org/r/155931580625.28323.5158822928646225903.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_kprobe.c | 25 |
1 files changed, 9 insertions, 16 deletions
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 7958da2fd922..01fc49f08b70 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -272,6 +272,7 @@ static void free_trace_kprobe(struct trace_kprobe *tk) kfree(tk->tp.call.class->system); kfree(tk->tp.call.name); + kfree(tk->tp.call.print_fmt); kfree(tk->symbol); free_percpu(tk->nhit); kfree(tk); @@ -730,6 +731,10 @@ static int trace_kprobe_create(int argc, const char *argv[]) goto error; /* This can be -ENOMEM */ } + ret = traceprobe_set_print_fmt(&tk->tp, is_return); + if (ret < 0) + goto error; + ret = register_trace_kprobe(tk); if (ret) { trace_probe_log_set_index(1); @@ -1416,18 +1421,14 @@ static int register_kprobe_event(struct trace_kprobe *tk) init_trace_event_call(tk, call); - if (traceprobe_set_print_fmt(&tk->tp, trace_kprobe_is_return(tk)) < 0) - return -ENOMEM; ret = register_trace_event(&call->event); - if (!ret) { - kfree(call->print_fmt); + if (!ret) return -ENODEV; - } + ret = trace_add_event_call(call); if (ret) { pr_info("Failed to register kprobe event: %s\n", trace_event_name(call)); - kfree(call->print_fmt); unregister_trace_event(&call->event); } return ret; @@ -1435,13 +1436,8 @@ static int register_kprobe_event(struct trace_kprobe *tk) static int unregister_kprobe_event(struct trace_kprobe *tk) { - int ret; - /* tp->event is unregistered in trace_remove_event_call() */ - ret = trace_remove_event_call(&tk->tp.call); - if (!ret) - kfree(tk->tp.call.print_fmt); - return ret; + return trace_remove_event_call(&tk->tp.call); } #ifdef CONFIG_PERF_EVENTS @@ -1479,10 +1475,8 @@ create_local_trace_kprobe(char *func, void *addr, unsigned long offs, } ret = __register_trace_kprobe(tk); - if (ret < 0) { - kfree(tk->tp.call.print_fmt); + if (ret < 0) goto error; - } return &tk->tp.call; error: @@ -1503,7 +1497,6 @@ void destroy_local_trace_kprobe(struct trace_event_call *event_call) __unregister_trace_kprobe(tk); - kfree(tk->tp.call.print_fmt); free_trace_kprobe(tk); } #endif /* CONFIG_PERF_EVENTS */ |