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-rw-r--r--tools/perf/util/session.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 1951e330377..8e7c1896eaa 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -70,8 +70,17 @@ struct perf_session *perf_session__new(const char *filename, int mode, bool forc
self->unknown_events = 0;
map_groups__init(&self->kmaps);
- if (mode == O_RDONLY && perf_session__open(self, force) < 0)
- goto out_delete;
+ if (mode == O_RDONLY) {
+ if (perf_session__open(self, force) < 0)
+ goto out_delete;
+ } else if (mode == O_WRONLY) {
+ /*
+ * In O_RDONLY mode this will be performed when reading the
+ * kernel MMAP event, in event__process_mmap().
+ */
+ if (perf_session__create_kernel_maps(self) < 0)
+ goto out_delete;
+ }
self->sample_type = perf_header__sample_type(&self->header);
out: