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Diffstat (limited to 'tools/perf/util/unwind-libunwind.c')
-rw-r--r--tools/perf/util/unwind-libunwind.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c
index 9778b3133b77..c0811977d7d5 100644
--- a/tools/perf/util/unwind-libunwind.c
+++ b/tools/perf/util/unwind-libunwind.c
@@ -5,6 +5,7 @@
#include "session.h"
#include "debug.h"
#include "env.h"
+#include "callchain.h"
struct unwind_libunwind_ops __weak *local_unwind_libunwind_ops;
struct unwind_libunwind_ops __weak *x86_32_unwind_libunwind_ops;
@@ -24,6 +25,9 @@ int unwind__prepare_access(struct thread *thread, struct map *map,
struct unwind_libunwind_ops *ops = local_unwind_libunwind_ops;
int err;
+ if (!dwarf_callchain_users)
+ return 0;
+
if (thread->addr_space) {
pr_debug("unwind: thread map already set, dso=%s\n",
map->dso->name);
@@ -65,12 +69,18 @@ out_register:
void unwind__flush_access(struct thread *thread)
{
+ if (!dwarf_callchain_users)
+ return;
+
if (thread->unwind_libunwind_ops)
thread->unwind_libunwind_ops->flush_access(thread);
}
void unwind__finish_access(struct thread *thread)
{
+ if (!dwarf_callchain_users)
+ return;
+
if (thread->unwind_libunwind_ops)
thread->unwind_libunwind_ops->finish_access(thread);
}