tree e7bcae45f66a0682f07d242f18b33681fc9e4cfa
parent abf736a7803f4acc8b70a2dab0d43b931aa9c5c0
author Ryan Prichard <rprichard@google.com> 1542883264 -0800
committer Ryan Prichard <rprichard@google.com> 1543443974 -0800

Move the abort message to libc_shared_globals

__libc_shared_globals() is available in dynamic modules as soon as
relocation has finished (i.e. after ifuncs run). Before ifuncs have run,
the android_set_abort_message() function already doesn't work because it
calls public APIs via the PLT. (If this matters, we can use a static
bool variable to enable android_set_abort_message after libc
initialization).

__libc_shared_globals() is hidden, so it's available in the linker
immediately (i.e. before relocation). TLS memory (e.g. errno) currently
isn't accessible until after relocation, but a later patch fixes that.

Bug: none
Test: bionic unit tests
Change-Id: Ied4433758ed2da9ee404c6158e319cf502d05a53