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Subject[PATCH -tip 06/14] perf probe: Fix --del to update current event list
Date
Fix --del option to update current existing event list
after perf probe deleted an event.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
---

tools/perf/util/probe-event.c | 5 ++++-
tools/perf/util/strlist.c | 6 +++---
tools/perf/util/strlist.h | 7 ++++++-
3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index d733bfa..4055d01 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -540,10 +540,12 @@ static void del_trace_kprobe_event(int fd, const char *group,
const char *event, struct strlist *namelist)
{
char buf[128];
+ struct str_node *ent;

if (e_snprintf(buf, 128, "%s:%s", group, event) < 0)
die("Failed to copy event.");
- if (!strlist__has_entry(namelist, buf)) {
+ ent = strlist__find(namelist, buf);
+ if (!ent) {
pr_info("Info: event \"%s\" does not exist."
" Could not remove it.\n", buf);
return;
@@ -554,6 +556,7 @@ static void del_trace_kprobe_event(int fd, const char *group,

write_trace_kprobe_event(fd, buf);
printf("Remove event: %s:%s\n", group, event);
+ strlist__remove(namelist, ent);
}

void del_trace_kprobe_events(struct strlist *dellist)
diff --git a/tools/perf/util/strlist.c b/tools/perf/util/strlist.c
index 7ad3817..6783a20 100644
--- a/tools/perf/util/strlist.c
+++ b/tools/perf/util/strlist.c
@@ -102,7 +102,7 @@ void strlist__remove(struct strlist *self, struct str_node *sn)
str_node__delete(sn, self->dupstr);
}

-bool strlist__has_entry(struct strlist *self, const char *entry)
+struct str_node *strlist__find(struct strlist *self, const char *entry)
{
struct rb_node **p = &self->entries.rb_node;
struct rb_node *parent = NULL;
@@ -120,10 +120,10 @@ bool strlist__has_entry(struct strlist *self, const char *entry)
else if (rc < 0)
p = &(*p)->rb_right;
else
- return true;
+ return sn;
}

- return false;
+ return NULL;
}

static int strlist__parse_list_entry(struct strlist *self, const char *s)
diff --git a/tools/perf/util/strlist.h b/tools/perf/util/strlist.h
index cb46593..59091c7 100644
--- a/tools/perf/util/strlist.h
+++ b/tools/perf/util/strlist.h
@@ -23,7 +23,12 @@ int strlist__load(struct strlist *self, const char *filename);
int strlist__add(struct strlist *self, const char *str);

struct str_node *strlist__entry(const struct strlist *self, unsigned int idx);
-bool strlist__has_entry(struct strlist *self, const char *entry);
+struct str_node *strlist__find(struct strlist *self, const char *entry);
+
+static inline bool strlist__has_entry(struct strlist *self, const char *entry)
+{
+ return strlist__find(self, entry) != NULL;
+}

static inline bool strlist__empty(const struct strlist *self)
{

--
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhiramat@redhat.com


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