tree e7f0b94189e633236a879ab059ce42f56de79fc3
parent 6e5f730243edb6232c6ce2ce9027b19c7a5628bf
author Yabin Cui <yabinc@google.com> 1479260829 -0800
committer Yabin Cui <yabinc@google.com> 1481135133 -0800

libbacktrace_offline: support .ARM.exidx.

1. Read .ARM.exidx and .ARM.extab, provides these data to libunwind
through AccessMem.
2. In FindProcInfo, search .ARM.exidx for the idx entry of function
containing ip.
3. Add structures to store .ARM.exidx info in DebugFrameInfo, and
clean up the structure.
4. Add tests to test each unwind information (.eh_frame, .debug_frame,
.gnu_debugdata, .ARM.exidx) separately.

Bug: http://b/30974693
Test: run backtrace_test.
Test: run simpleperf runtest.py.
Change-Id: I9377a54379158bd35860efcf0e011423be7350d4