[PATCH] perf tools: Get current comm instead of last one

From: Namhyung Kim
Date: Fri Sep 13 2013 - 03:28:57 EST


At insert time, a hist entry should reference comm at the time
otherwise it can get a different comm later.

Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
tools/perf/util/hist.c | 3 +++
tools/perf/util/sort.c | 9 +++++----
tools/perf/util/sort.h | 1 +
tools/perf/util/thread.c | 10 ++--------
tools/perf/util/thread.h | 2 ++
5 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 1f5767f97dce..1fe90bd9dcb7 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -412,6 +412,7 @@ struct hist_entry *__hists__add_mem_entry(struct hists *self,
{
struct hist_entry entry = {
.thread = al->thread,
+ .comm = curr_comm(al->thread),
.ms = {
.map = al->map,
.sym = al->sym,
@@ -442,6 +443,7 @@ struct hist_entry *__hists__add_branch_entry(struct hists *self,
{
struct hist_entry entry = {
.thread = al->thread,
+ .comm = curr_comm(al->thread),
.ms = {
.map = bi->to.map,
.sym = bi->to.sym,
@@ -471,6 +473,7 @@ struct hist_entry *__hists__add_entry(struct hists *self,
{
struct hist_entry entry = {
.thread = al->thread,
+ .comm = curr_comm(al->thread),
.ms = {
.map = al->map,
.sym = al->sym,
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 3b307e740d6e..840481859e4b 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -1,5 +1,6 @@
#include "sort.h"
#include "hist.h"
+#include "comm.h"
#include "symbol.h"

regex_t parent_regex;
@@ -80,14 +81,14 @@ static int64_t
sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
{
/* Compare the addr that should be unique among comm */
- return thread__comm_curr(right->thread) - thread__comm_curr(left->thread);
+ return comm__str(right->comm) - comm__str(left->comm);
}

static int64_t
sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
{
- const char *comm_l = thread__comm_curr(left->thread);
- const char *comm_r = thread__comm_curr(right->thread);
+ const char *comm_l = comm__str(left->comm);
+ const char *comm_r = comm__str(right->comm);

if (!comm_l || !comm_r)
return cmp_null(comm_l, comm_r);
@@ -98,7 +99,7 @@ sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
static int hist_entry__comm_snprintf(struct hist_entry *self, char *bf,
size_t size, unsigned int width)
{
- return repsep_snprintf(bf, size, "%*s", width, thread__comm_curr(self->thread));
+ return repsep_snprintf(bf, size, "%*s", width, comm__str(self->comm));
}

struct sort_entry sort_comm = {
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 4e80dbd271e7..4d0153f83e3c 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -84,6 +84,7 @@ struct hist_entry {
struct he_stat stat;
struct map_symbol ms;
struct thread *thread;
+ struct comm *comm;
u64 ip;
s32 cpu;

diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index d3ca133329b2..e7c7fe6694e8 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -54,7 +54,7 @@ void thread__delete(struct thread *self)
free(self);
}

-static struct comm *curr_comm(const struct thread *self)
+struct comm *curr_comm(const struct thread *self)
{
if (list_empty(&self->comm_list))
return NULL;
@@ -65,13 +65,7 @@ static struct comm *curr_comm(const struct thread *self)
/* CHECKME: time should always be 0 if event aren't ordered */
int thread__set_comm(struct thread *self, const char *str, u64 timestamp)
{
- struct comm *new, *curr = curr_comm(self);
-
- /* Override latest entry if it had no specific time coverage */
- if (!curr->start) {
- list_del(&curr->list);
- comm__free(curr);
- }
+ struct comm *new;

new = comm__new(str, timestamp);
if (!new)
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 1d9378abb515..cf8e31d0028b 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -26,6 +26,7 @@ struct thread {
};

struct machine;
+struct comm;

struct thread *thread__new(pid_t pid, pid_t tid);
void thread__delete(struct thread *self);
@@ -36,6 +37,7 @@ static inline void thread__exited(struct thread *thread)

int thread__set_comm(struct thread *self, const char *comm, u64 timestamp);
int thread__comm_len(struct thread *self);
+struct comm *curr_comm(const struct thread *self);
const char *thread__comm_curr(const struct thread *self);
void thread__insert_map(struct thread *self, struct map *map);
int thread__fork(struct thread *self, struct thread *parent, u64 timestamp);
--
1.7.11.7

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