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authorMasami Hiramatsu <mhiramat@kernel.org>2019-06-01 00:16:56 +0900
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2019-07-16 15:14:47 -0400
commitb4d4b96be89466049a0d383d019edc1403bf0ba9 (patch)
tree8c66639c477132c3a3fe066eab700e2778557197 /kernel
parentf730e0f2da4d0035775ab3c85757fee37bb9cbbe (diff)
downloadlinux-b4d4b96be89466049a0d383d019edc1403bf0ba9.tar.bz2
tracing/uprobe: Set print format when parsing command
Set event call's print format right after parsed command for simplifying (un)register_uprobe_event(). Link: http://lkml.kernel.org/r/155931581659.28323.5404667166417404076.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_uprobe.c25
1 files changed, 7 insertions, 18 deletions
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index 3d6b868830f3..34ce671b6080 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -345,6 +345,7 @@ static void free_trace_uprobe(struct trace_uprobe *tu)
path_put(&tu->path);
kfree(tu->tp.call.class->system);
kfree(tu->tp.call.name);
+ kfree(tu->tp.call.print_fmt);
kfree(tu->filename);
kfree(tu);
}
@@ -592,6 +593,10 @@ static int trace_uprobe_create(int argc, const char **argv)
goto error;
}
+ ret = traceprobe_set_print_fmt(&tu->tp, is_ret_probe(tu));
+ if (ret < 0)
+ goto error;
+
ret = register_trace_uprobe(tu);
if (!ret)
goto out;
@@ -1362,21 +1367,15 @@ static int register_uprobe_event(struct trace_uprobe *tu)
init_trace_event_call(tu, call);
- if (traceprobe_set_print_fmt(&tu->tp, is_ret_probe(tu)) < 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 uprobe event: %s\n",
trace_event_name(call));
- kfree(call->print_fmt);
unregister_trace_event(&call->event);
}
@@ -1385,15 +1384,8 @@ static int register_uprobe_event(struct trace_uprobe *tu)
static int unregister_uprobe_event(struct trace_uprobe *tu)
{
- int ret;
-
/* tu->event is unregistered in trace_remove_event_call() */
- ret = trace_remove_event_call(&tu->tp.call);
- if (ret)
- return ret;
- kfree(tu->tp.call.print_fmt);
- tu->tp.call.print_fmt = NULL;
- return 0;
+ return trace_remove_event_call(&tu->tp.call);
}
#ifdef CONFIG_PERF_EVENTS
@@ -1452,9 +1444,6 @@ void destroy_local_trace_uprobe(struct trace_event_call *event_call)
tu = container_of(event_call, struct trace_uprobe, tp.call);
- kfree(tu->tp.call.print_fmt);
- tu->tp.call.print_fmt = NULL;
-
free_trace_uprobe(tu);
}
#endif /* CONFIG_PERF_EVENTS */