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-rw-r--r--tools/perf/util/thread.c18
-rw-r--r--tools/perf/util/thread.h1
2 files changed, 13 insertions, 6 deletions
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 634b7f7140d5..9e8995eaf2b6 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -36,7 +36,10 @@ int thread__set_comm(struct thread *self, const char *comm)
if (self->comm)
free(self->comm);
self->comm = strdup(comm);
- return self->comm ? 0 : -ENOMEM;
+ if (self->comm == NULL)
+ return -ENOMEM;
+ self->comm_set = true;
+ return 0;
}
int thread__comm_len(struct thread *self)
@@ -255,11 +258,14 @@ int thread__fork(struct thread *self, struct thread *parent)
{
int i;
- if (self->comm)
- free(self->comm);
- self->comm = strdup(parent->comm);
- if (!self->comm)
- return -ENOMEM;
+ if (parent->comm_set) {
+ if (self->comm)
+ free(self->comm);
+ self->comm = strdup(parent->comm);
+ if (!self->comm)
+ return -ENOMEM;
+ self->comm_set = true;
+ }
for (i = 0; i < MAP__NR_TYPES; ++i)
if (map_groups__clone(&self->mg, &parent->mg, i) < 0)
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 56f317b8a06c..0a28f39de545 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -15,6 +15,7 @@ struct thread {
struct map_groups mg;
pid_t pid;
char shortname[3];
+ bool comm_set;
char *comm;
int comm_len;
};