tree 3ff56343799a7a26dc1a6ed4676404704ab46824
parent 1a17b09174b47e08b13077f803081918b13c0722
author Christopher Ferris <cferris@google.com> 1555037135 -0700
committer Christopher Ferris <cferris@google.com> 1555114998 -0700

Fix pc/function name for signal handler frame.

This refactors the step function slightly to split it up into
distinct pieces since the code needs to handle a signal handler
versus normal step slightly differently.

Add a new error for an invalid elf.

Modify libbacktrace code to handle new error code.

Bug: 130302288

Test: libbacktrace/libunwindstack unit tests.
Change-Id: I3fb9b00c02d2cf2cc5911541bba0346c6f39b8e6