compiler-rt/lib/tsan: allow the Go runtime to return multiple stack f…

[randall77]

…rames for a single PC

This fix allows tsan to report stack traces correctly even in the presence of mid-stack inlining by the Go compiler.

See https://github.com/golang/go/issues/33309

[randall77]

@dvyukov

[randall77]

I'm not sure if this is the right way to upstream changes to compiler-rt. Anyone who knows the right process please chime in.

[dvyukov]

I think the main repo is still in svn: https://llvm.org/docs/Contributing.html#how-to-submit-a-patch https://llvm.org/docs/Phabricator.html A shorter version is to upload the change to Phabricator: https://llvm.org/docs/Phabricator.html#requesting-a-review-via-the-web-interface and then somebody will merge after a review.