diff options
Diffstat (limited to 'tools/perf/util/unwind-libunwind.c')
| -rw-r--r-- | tools/perf/util/unwind-libunwind.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c index f86f903ae8a8..0086726e00e0 100644 --- a/tools/perf/util/unwind-libunwind.c +++ b/tools/perf/util/unwind-libunwind.c @@ -1,5 +1,8 @@ #include "unwind.h" #include "thread.h" +#include "session.h" +#include "debug.h" +#include "arch/common.h" struct unwind_libunwind_ops __weak *local_unwind_libunwind_ops; @@ -9,8 +12,28 @@ static void unwind__register_ops(struct thread *thread, thread->unwind_libunwind_ops = ops; } -int unwind__prepare_access(struct thread *thread) +int unwind__prepare_access(struct thread *thread, struct map *map) { + const char *arch; + enum dso_type dso_type; + + if (thread->addr_space) { + pr_debug("unwind: thread map already set, dso=%s\n", + map->dso->name); + return 0; + } + + /* env->arch is NULL for live-mode (i.e. perf top) */ + if (!thread->mg->machine->env || !thread->mg->machine->env->arch) + goto out_register; + + dso_type = dso__type(map->dso, thread->mg->machine); + if (dso_type == DSO__TYPE_UNKNOWN) + return 0; + + arch = normalize_arch(thread->mg->machine->env->arch); + pr_debug("unwind: target platform=%s\n", arch); +out_register: unwind__register_ops(thread, local_unwind_libunwind_ops); return thread->unwind_libunwind_ops->prepare_access(thread); |