perf machine: Factor machine__find_thread to take tid argument

Forcing the code to always search thread by pid/tid pair.

The PID value will be needed in future to determine the process thread
leader for map groups sharing.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1394805606-25883-3-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

3 files changed, 12 insertions, 6 deletions

diff --git a/tools/perf/tests/dwarf-unwind.c b/tools/perf/tests/dwarf-unwind.c
index f16ea2808a75..c059ee81c038 100644
--- a/tools/perf/tests/dwarf-unwind.c
+++ b/tools/perf/tests/dwarf-unwind.c
@@ -128,7 +128,7 @@ int test__dwarf_unwind(void)
         if (verbose > 1)
                 machine__fprintf(machine, stderr);
 
-        thread = machine__find_thread(machine, getpid());
+        thread = machine__find_thread(machine, getpid(), getpid());
         if (!thread) {
                 pr_err("Could not get thread\n");
                 goto out;
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index a6799538069c..5cecd98c1bc0 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -327,9 +327,10 @@ struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
         return __machine__findnew_thread(machine, pid, tid, true);
 }
 
-struct thread *machine__find_thread(struct machine *machine, pid_t tid)
+struct thread *machine__find_thread(struct machine *machine, pid_t pid,
+                                    pid_t tid)
 {
-        return __machine__findnew_thread(machine, 0, tid, false);
+        return __machine__findnew_thread(machine, pid, tid, false);
 }
 
 int machine__process_comm_event(struct machine *machine, union perf_event *event,
@@ -1114,7 +1115,9 @@ static void machine__remove_thread(struct machine *machine, struct thread *th)
 int machine__process_fork_event(struct machine *machine, union perf_event *event,
                                 struct perf_sample *sample)
 {
-        struct thread *thread = machine__find_thread(machine, event->fork.tid);
+        struct thread *thread = machine__find_thread(machine,
+                                                     event->fork.pid,
+                                                     event->fork.tid);
         struct thread *parent = machine__findnew_thread(machine,
                                                         event->fork.ppid,
                                                         event->fork.ptid);
@@ -1140,7 +1143,9 @@ int machine__process_fork_event(struct machine *machine, union perf_event *event
 int machine__process_exit_event(struct machine *machine, union perf_event *event,
                                 struct perf_sample *sample __maybe_unused)
 {
-        struct thread *thread = machine__find_thread(machine, event->fork.tid);
+        struct thread *thread = machine__find_thread(machine,
+                                                     event->fork.pid,
+                                                     event->fork.tid);
 
         if (dump_trace)
                 perf_event__fprintf_task(event, stdout);
diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index 2e6c248c870f..c8c74a119398 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -41,7 +41,8 @@ struct map *machine__kernel_map(struct machine *machine, enum map_type type)
         return machine->vmlinux_maps[type];
 }
 
-struct thread *machine__find_thread(struct machine *machine, pid_t tid);
+struct thread *machine__find_thread(struct machine *machine, pid_t pid,
+                                    pid_t tid);
 
 int machine__process_comm_event(struct machine *machine, union perf_event *event,
                                 struct perf_sample *sample);