tree eee3c6e8b17b1ebeb571da6d16c1cc8cc99cd8b8
parent f9aeeee93e738c86130e34664f9e97b1b98c3978
author Sterling Augustine <saugustine@google.com> 1597777507 -0700
committer Copybara-Service <copybara-worker@google.com> 1598638695 -0700

Default to disabling the libunwind frameheader cache.

Although it works fine with glibc, as currently implemented the
frameheader cache is incompatible with certain platforms with
slightly different locking semantics inside dl_iterate_phdr.

Therefore only enable it when it is turned on explicitly with
a configure-time option.

Differential Revision: https://reviews.llvm.org/D86163

GitOrigin-RevId: a20f5fe70810e0a768c1814d69d10862965c21e4