diff options
Diffstat (limited to 'tools/perf/util/unwind-libunwind.c')
| -rw-r--r-- | tools/perf/util/unwind-libunwind.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c index b029a5e9ae49..c0811977d7d5 100644 --- a/tools/perf/util/unwind-libunwind.c +++ b/tools/perf/util/unwind-libunwind.c @@ -1,9 +1,11 @@ // SPDX-License-Identifier: GPL-2.0 #include "unwind.h" +#include "map.h" #include "thread.h" #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; @@ -23,6 +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); @@ -64,12 +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); } |
