tree 9d9f6ee91431a1d1b649e70ddd055aa9cf0efcd9
parent db3e650b88c76cc25cfc1a23c075bb1276e744ab
author Daniel Kiss <daniel.kiss@arm.com> 1600290199 +0200
committer Copybara-Service <copybara-worker@google.com> 1604019950 -0700

[libunwind] Support for leaf function unwinding.

Unwinding leaf function is useful in cases when the backtrace finds a
leaf function for example when it caused a signal.
This patch also add the support for the DW_CFA_undefined because it marks
the end of the frames.

Ryan Prichard provided code for the tests.

Reviewed By: #libunwind, mstorsjo

Differential Revision: https://reviews.llvm.org/D83573

Reland with limit the test to the x86_64-linux target.

GitOrigin-RevId: 22b615a96593f13109a27cabfd1764ec4f558c7a