Unwind: prevent unw_get_proc_info from returning stale data
If unwind info is not available at the current IP, unw_get_proc_info should
return a zero-filled structure rather than the info of the previous IP.
This change also makes unw_get_proc_info return UNW_ENOINFO instead of
UNW_ESUCCESS.
Patch by Amanieu d'Antras!
llvm-svn: 372407
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: ae685e7aab7f278cf197b8b1b1ccf76a6e884682
diff --git a/src/UnwindCursor.hpp b/src/UnwindCursor.hpp
index a96c9f3..488c317 100644
--- a/src/UnwindCursor.hpp
+++ b/src/UnwindCursor.hpp
@@ -1991,7 +1991,10 @@
template <typename A, typename R>
void UnwindCursor<A, R>::getInfo(unw_proc_info_t *info) {
- *info = _info;
+ if (_unwindInfoMissing)
+ memset(info, 0, sizeof(*info));
+ else
+ *info = _info;
}
template <typename A, typename R>