[tip:perf/core] perf tools: Save parent pid in thread struct

tip-bot for David Ahern
2013-05-31T11:53:07Z

Commit-ID: 70c57efb6118bff7426a6086026a4a8f3bd3c9e3
Gitweb: http://git.kernel.org/tip/70c57efb6118bff7426a6086026a4a8f3bd3c9e3
Author: David Ahern <dsahern@gmail.com>
AuthorDate: Sat, 25 May 2013 22:47:10 -0600
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Tue, 28 May 2013 16:24:05 +0300

perf tools: Save parent pid in thread struct

Information is available, so why not save it in case some command wants
to use it.

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1369543631-5106-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/thread.c | 4 ++++
tools/perf/util/thread.h | 1 +
2 files changed, 5 insertions(+)

diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 632e40e..40399cb 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -14,6 +14,7 @@ struct thread *thread__new(pid_t pid)
if (self != NULL) {
map_groups__init(&self->mg);
self->pid = pid;
+ self->ppid = -1;
self->comm = malloc(32);
if (self->comm)
snprintf(self->comm, 32, ":%d", self->pid);
@@ -82,5 +83,8 @@ int thread__fork(struct thread *self, struct thread *parent)
for (i = 0; i < MAP__NR_TYPES; ++i)
if (map_groups__clone(&self->mg, &parent->mg, i) < 0)
return -ENOMEM;
+
+ self->ppid = parent->pid;
+
return 0;
}
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 5ad2664..eeb7ac6 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -13,6 +13,7 @@ struct thread {
};
struct map_groups mg;
pid_t pid;
+ pid_t ppid;
char shortname[3];
bool comm_set;
char *comm;