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platform_kernel-5.15
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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>
This commit is contained in:
Masami Hiramatsu 2019-06-01 00:16:56 +09:00 committed by Steven Rostedt (VMware)
parent f730e0f2da
commit b4d4b96be8
1 changed files with 7 additions and 18 deletions
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25
kernel/trace/trace_uprobe.c
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@ -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 */