tree 0ead835d3731dce0a047e601911dd98cec33d766
parent b56903608c7926cb28cff6b01a938a5888007cbd
author Mitch Phillips <31459023+hctim@users.noreply.github.com> 1595344742 -0700
committer Copybara-Service <copybara-worker@google.com> 1601491386 -0700

[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