Commit Graph

3 Commits

Author SHA1 Message Date
Sterling Augustine 3758b858ef Only run frameheader_cache_test.pass.cpp on x86_64.
Although there is nothing architecturally specific, the
ifdef chains are too complicated otherwise.
2020-03-12 18:14:22 -07:00
Sterling Augustine 3eef58991b Add a catch-all else case so any unanticipated configs pass this test. 2020-03-12 11:55:10 -07:00
Sterling Augustine c53c2058ff Cache uwnind frame headers as they are found.
Summary:
This improves unwind performance quite substantially, and follows
a somewhat similar approach used in libgcc_s as described in the
thread here:

https://gcc.gnu.org/ml/gcc/2005-02/msg00625.html

On certain extremely exception heavy internal tests, the time
drops from about 80 minutes to about five minutes.

Subscribers: libcxx-commits

Tags: #libc

Differential Revision: https://reviews.llvm.org/D75954
2020-03-12 10:53:33 -07:00