The object hierarchy was confusing and convoluted. This removes
a lot of unnecessary code, and consolidates the BacktraceCurrent
and BacktraceThread code into BacktraceCurrent.
Change-Id: I01c8407d493712a48169df49dd3ff46db4a7c3ae
The latest clang (r230699) does not allow SP/PC to be declared in inline asm
lists. This is a problem for libraries that are attempting to save all
register state.
Change-Id: I1ce80530f8be85fd74e949d0c65b60080e0aaf2a
The libc++ version of libbacktrace on the host was still linking against
libstdc++, and this was causing problems in art.
Change-Id: I1d14fb9e18abd074affcf46c8044407041970669