From: Masami Hiramatsu <mhiramat@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org,
Tom Zanussi <tom.zanussi@linux.intel.com>,
Ravi Bangoria <ravi.bangoria@linux.ibm.com>,
Namhyung Kim <namhyung@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>
Subject: [PATCH 01/21] tracing/kprobe: Set print format right after parsed command
Date: Sat, 1 Jun 2019 00:16:46 +0900 [thread overview]
Message-ID: <155931580625.28323.5158822928646225903.stgit@devnote2> (raw)
In-Reply-To: <155931578555.28323.16360245959211149678.stgit@devnote2>
Set event call's print format right after parsed command for
simplifying (un)register_kprobe_event().
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
kernel/trace/trace_kprobe.c | 25 +++++++++----------------
1 file 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 */
next prev parent reply other threads:[~2019-05-31 15:16 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-31 15:16 [PATCH 00/21] tracing/probe: Add multi-probes per event support Masami Hiramatsu
2019-05-31 15:16 ` Masami Hiramatsu [this message]
2019-05-31 15:16 ` [PATCH 02/21] tracing/uprobe: Set print format when parsing command Masami Hiramatsu
2019-05-31 15:17 ` [PATCH 03/21] tracing/probe: Add trace_probe init and free functions Masami Hiramatsu
2019-05-31 15:17 ` [PATCH 04/21] tracing/probe: Add trace_event_call register API for trace_probe Masami Hiramatsu
2019-05-31 15:17 ` [PATCH 05/21] tracing/probe: Add trace_event_file access APIs " Masami Hiramatsu
2019-05-31 15:17 ` [PATCH 06/21] tracing/probe: Add trace flag " Masami Hiramatsu
2019-05-31 15:17 ` [PATCH 07/21] tracing/probe: Add probe event name and group name accesses APIs Masami Hiramatsu
2019-05-31 15:17 ` [PATCH 08/21] tracing/probe: Add trace_event_call " Masami Hiramatsu
2019-05-31 15:18 ` [PATCH 09/21] tracing/kprobe: Check registered state using kprobe Masami Hiramatsu
2019-05-31 15:18 ` [PATCH 10/21] tracing/probe: Split trace_event related data from trace_probe Masami Hiramatsu
2019-06-18 1:56 ` Steven Rostedt
2019-06-18 16:14 ` Masami Hiramatsu
2019-06-18 16:23 ` Steven Rostedt
2019-06-18 21:11 ` Steven Rostedt
2019-06-19 2:28 ` Masami Hiramatsu
2019-06-19 9:19 ` Steven Rostedt
2019-06-19 1:11 ` Masami Hiramatsu
2019-05-31 15:18 ` [PATCH 11/21] tracing/dynevent: Delete all matched events Masami Hiramatsu
2019-05-31 15:18 ` [PATCH 12/21] tracing/dynevent: Pass extra arguments to match operation Masami Hiramatsu
2019-05-31 15:18 ` [PATCH 13/21] tracing/kprobe: Add multi-probe per event support Masami Hiramatsu
2019-05-31 15:18 ` [PATCH 14/21] tracing/uprobe: Add multi-probe per uprobe " Masami Hiramatsu
2019-05-31 15:19 ` [PATCH 15/21] tracing/kprobe: Add per-probe delete from event Masami Hiramatsu
2019-05-31 15:19 ` [PATCH 16/21] tracing/uprobe: " Masami Hiramatsu
2019-06-18 2:16 ` Steven Rostedt
2019-06-18 16:18 ` Masami Hiramatsu
2019-05-31 15:19 ` [PATCH 17/21] tracing/probe: Add immediate parameter support Masami Hiramatsu
2019-05-31 15:19 ` [PATCH 18/21] tracing/probe: Add immediate string " Masami Hiramatsu
2019-05-31 15:19 ` [PATCH 19/21] selftests/ftrace: Add a testcase for kprobe multiprobe event Masami Hiramatsu
2019-05-31 15:19 ` [PATCH 20/21] selftests/ftrace: Add syntax error test for immediates Masami Hiramatsu
2019-05-31 15:20 ` [PATCH 21/21] selftests/ftrace: Add syntax error test for multiprobe Masami Hiramatsu
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