On 6/28/13 2:43 AM, Adrian Hunter wrote:
Record pid on struct thread. The member is named 'pid_'
to avoid confusion with the 'tid' member which was previously
named 'pid'.
Signed-off-by: Adrian Hunter <[email protected]>
---
tools/perf/util/machine.c | 26 +++++++++++++++++++++-----
tools/perf/util/machine.h | 2 ++
tools/perf/util/thread.c | 3 ++-
tools/perf/util/thread.h | 3 ++-
4 files changed, 27 insertions(+), 7 deletions(-)
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index ef0be97..722281a 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -233,7 +233,8 @@ void machines__set_id_hdr_size(struct machines *machines,
u16 id_hdr_size)
return;
}
-static struct thread *__machine__findnew_thread(struct machine *machine, pid_t
tid,
+static struct thread *__machine__findnew_thread(struct machine *machine,
+ pid_t pid, pid_t tid,
bool create)
{
struct rb_node **p = &machine->threads.rb_node;
@@ -245,8 +246,11 @@ static struct thread *__machine__findnew_thread(struct
machine *machine, pid_t t
* so most of the time we dont have to look up
* the full rbtree:
*/
- if (machine->last_match && machine->last_match->tid == tid)
+ if (machine->last_match && machine->last_match->tid == tid) {
+ if (pid && !machine->last_match->pid_)
+ machine->last_match->pid_ = pid;
return machine->last_match;
+ }
while (*p != NULL) {
parent = *p;
@@ -254,6 +258,8 @@ static struct thread *__machine__findnew_thread(struct
machine *machine, pid_t t
if (th->tid == tid) {
machine->last_match = th;
+ if (pid && !th->pid_)
+ th->pid_ = pid;
return th;
}
@@ -266,7 +272,7 @@ static struct thread *__machine__findnew_thread(struct
machine *machine, pid_t t
if (!create)
return NULL;
- th = thread__new(tid);
+ th = thread__new(pid, tid);
if (th != NULL) {
rb_link_node(&th->rb_node, parent, p);
rb_insert_color(&th->rb_node, &machine->threads);
@@ -278,12 +284,12 @@ static struct thread *__machine__findnew_thread(struct
machine *machine, pid_t t
struct thread *machine__findnew_thread(struct machine *machine, pid_t tid)
{
- return __machine__findnew_thread(machine, tid, true);
+ return __machine__findnew_thread(machine, 0, tid, true);
}
struct thread *machine__find_thread(struct machine *machine, pid_t tid)
{
- return __machine__findnew_thread(machine, tid, false);
+ return __machine__findnew_thread(machine, 0, tid, false);
}
int machine__process_comm_event(struct machine *machine, union perf_event
*event)
@@ -1264,3 +1270,13 @@ int machine__resolve_callchain(struct machine *machine,
sample);
}
+
+pid_t machine__get_thread_pid(struct machine *machine, pid_t tid)
+{
+ struct thread *thread = machine__find_thread(machine, tid);
+
+ if (!thread)
+ return 0;
+
+ return thread->pid_;
+}
The APIs should be machine__find_thread and then given a thread have
something like thread__get_pid(thread) but to go from machine returning
a thread's pid seems odd.
Also, there are no users of this function, so no need to create it anyways.
David
diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index e49ba01..221a0a9 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -156,4 +156,6 @@ void machines__destroy_kernel_maps(struct machines
*machines);
size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp);
+pid_t machine__get_thread_pid(struct machine *machine, pid_t tid);
+
#endif /* __PERF_MACHINE_H */
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 6feeb88..e3d4a55 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -7,12 +7,13 @@
#include "util.h"
#include "debug.h"
-struct thread *thread__new(pid_t tid)
+struct thread *thread__new(pid_t pid, pid_t tid)
{
struct thread *self = zalloc(sizeof(*self));
if (self != NULL) {
map_groups__init(&self->mg);
+ self->pid_ = pid;
self->tid = tid;
self->ppid = -1;
self->comm = malloc(32);
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 37a86a3..bfa68e7 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -12,6 +12,7 @@ struct thread {
struct list_head node;
};
struct map_groups mg;
+ pid_t pid_; /* Not all tools update this */
pid_t tid;
pid_t ppid;
char shortname[3];
@@ -24,7 +25,7 @@ struct thread {
struct machine;
-struct thread *thread__new(pid_t tid);
+struct thread *thread__new(pid_t pid, pid_t tid);
void thread__delete(struct thread *self);
int thread__set_comm(struct thread *self, const char *comm);
--
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