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Message-ID: <tip-a7c312bed772c11138409c3a98531e85d690302e@git.kernel.org>
Date: Wed, 9 Dec 2009 07:26:01 GMT
From: tip-bot for Masami Hiramatsu <mhiramat@...hat.com>
To: linux-tip-commits@...r.kernel.org
Cc: acme@...hat.com, mingo@...hat.com, peterz@...radead.org,
dle-develop@...ts.sourceforge.net, fweisbec@...il.com,
rostedt@...dmis.org, jbaron@...hat.com, tglx@...utronix.de,
mhiramat@...hat.com, systemtap@...rces.redhat.com,
linux-kernel@...r.kernel.org, hpa@...or.com, fche@...hat.com,
jkenisto@...ibm.com, hch@...radead.org, ananth@...ibm.com,
srikar@...ux.vnet.ibm.com, mingo@...e.hu, prasad@...ux.vnet.ibm.com
Subject: [tip:perf/urgent] trace-kprobe: Support delete probe syntax
Commit-ID: a7c312bed772c11138409c3a98531e85d690302e
Gitweb: http://git.kernel.org/tip/a7c312bed772c11138409c3a98531e85d690302e
Author: Masami Hiramatsu <mhiramat@...hat.com>
AuthorDate: Tue, 8 Dec 2009 17:03:16 -0500
Committer: Ingo Molnar <mingo@...e.hu>
CommitDate: Wed, 9 Dec 2009 07:26:53 +0100
trace-kprobe: Support delete probe syntax
Support delete probe syntax. The syntax is "-:[group/]event".
Signed-off-by: Masami Hiramatsu <mhiramat@...hat.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Jim Keniston <jkenisto@...ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@...ibm.com>
Cc: Christoph Hellwig <hch@...radead.org>
Cc: Frank Ch. Eigler <fche@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jason Baron <jbaron@...hat.com>
Cc: K.Prasad <prasad@...ux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: systemtap <systemtap@...rces.redhat.com>
Cc: DLE <dle-develop@...ts.sourceforge.net>
LKML-Reference: <20091208220316.10142.39192.stgit@...p-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Jim Keniston <jkenisto@...ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@...ibm.com>
Cc: Christoph Hellwig <hch@...radead.org>
Cc: Frank Ch. Eigler <fche@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jason Baron <jbaron@...hat.com>
Cc: K.Prasad <prasad@...ux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
---
kernel/trace/trace_kprobe.c | 37 ++++++++++++++++++++++++++++---------
1 files changed, 28 insertions(+), 9 deletions(-)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index aff5f80..bf05fb4 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -606,23 +606,22 @@ static int create_trace_probe(int argc, char **argv)
*/
struct trace_probe *tp;
int i, ret = 0;
- int is_return = 0;
+ int is_return = 0, is_delete = 0;
char *symbol = NULL, *event = NULL, *arg = NULL, *group = NULL;
unsigned long offset = 0;
void *addr = NULL;
char buf[MAX_EVENT_NAME_LEN];
- if (argc < 2) {
- pr_info("Probe point is not specified.\n");
- return -EINVAL;
- }
-
+ /* argc must be >= 1 */
if (argv[0][0] == 'p')
is_return = 0;
else if (argv[0][0] == 'r')
is_return = 1;
+ else if (argv[0][0] == '-')
+ is_delete = 1;
else {
- pr_info("Probe definition must be started with 'p' or 'r'.\n");
+ pr_info("Probe definition must be started with 'p', 'r' or"
+ " '-'.\n");
return -EINVAL;
}
@@ -642,7 +641,29 @@ static int create_trace_probe(int argc, char **argv)
return -EINVAL;
}
}
+ if (!group)
+ group = KPROBE_EVENT_SYSTEM;
+ if (is_delete) {
+ if (!event) {
+ pr_info("Delete command needs an event name.\n");
+ return -EINVAL;
+ }
+ tp = find_probe_event(event, group);
+ if (!tp) {
+ pr_info("Event %s/%s doesn't exist.\n", group, event);
+ return -ENOENT;
+ }
+ /* delete an event */
+ unregister_trace_probe(tp);
+ free_trace_probe(tp);
+ return 0;
+ }
+
+ if (argc < 2) {
+ pr_info("Probe point is not specified.\n");
+ return -EINVAL;
+ }
if (isdigit(argv[1][0])) {
if (is_return) {
pr_info("Return probe point must be a symbol.\n");
@@ -671,8 +692,6 @@ static int create_trace_probe(int argc, char **argv)
argc -= 2; argv += 2;
/* setup a probe */
- if (!group)
- group = KPROBE_EVENT_SYSTEM;
if (!event) {
/* Make a new event name */
if (symbol)
--
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