[GWP-ASan] Split the unwinder into segv/non-segv.
Note: Resubmission with frame pointers force-enabled to fix builds with
-DCOMPILER_RT_BUILD_BUILTINS=False
Summary:
Splits the unwinder into a non-segv (for allocation/deallocation traces) and a
segv unwinder. This ensures that implementations can select an accurate, slower
unwinder in the segv handler (if they choose to use the GWP-ASan provided one).
This is important as fast frame-pointer unwinders (like the sanitizer unwinder)
don't like unwinding through signal handlers.
Reviewers: morehouse, cryptoad
Reviewed By: morehouse, cryptoad
Subscribers: cryptoad, mgorny, eugenis, pcc, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D83994
GitOrigin-RevId: 4f029d1be4e19270416637327f56668744e64b5c
diff --git a/combined.h b/combined.h
index 3bb41ec..ae085be 100644
--- a/combined.h
+++ b/combined.h
@@ -192,7 +192,7 @@
if (Opt.InstallSignalHandlers)
gwp_asan::crash_handler::installSignalHandlers(
&GuardedAlloc, Printf, gwp_asan::options::getPrintBacktraceFunction(),
- Opt.Backtrace);
+ gwp_asan::crash_handler::getSegvBacktraceFunction());
#endif // GWP_ASAN_HOOKS
}
