tree 4d746cfc20a1d3b5886f691ed1a49ddf34e2df78
parent a9944cfe9e152ca46afb0a77300ec5a2a1a24e64
author Elliott Hughes <enh@google.com> 1350428086 -0700
committer Elliott Hughes <enh@google.com> 1350435497 -0700

Make dlerror(3) thread-safe.

I gave up trying to use the usual thread-local buffer idiom; calls to
calloc(3) and free(3) from any of the "dl" functions -- which live in
the dynamic linker -- end up resolving to the dynamic linker's stubs.
I tried to work around that, but was just making things more complicated.
This alternative costs us a well-known TLS slot (instead of the
dynamically-allocated TLS slot we'd have used otherwise, so no difference
there), plus an extra buffer inside every pthread_internal_t.

Bug: 5404023
Change-Id: Ie9614edd05b6d1eeaf7bf9172792d616c6361767