Add unit tests for overlapping functions and externs.

Add unit tests for overlapping functions and externs.

R=mark@chromium.org

Committed: https://code.google.com/p/google-breakpad/source/detail?r=1424

[Lei Zhang (chromium)]

. o O (We probably should add tests for this)

I'll look into adding a bigger test for testing the .gnu_debuglink
functionality.

[Mark Mentovai]

LGTM. Thanks for the test!

[Lei Zhang (chromium)]

Committed patchset #1 (id:1) manually as r1424 (presubmit successful).

[Ted Mielczarek]

On 2015/02/03 23:46:16, Lei Zhang (chromium) wrote:
> . o O (We probably should add tests for this)
> 
> I'll look into adding a bigger test for testing the .gnu_debuglink
> functionality.

Thanks for writing this! Touching that code was painful. I would like to have
some more tests in dump_symbols_unittest.cc, but they're a pain to write because
you need to generate plausible ELF and DWARF test data. That file already has a
synthetic ELF generator based on the TestAssembler code (and tests that generate
symbol tables), and dwarf2reader_die_unittest.cc has some code for generating
synthetic DWARF, so it might not be too bad to leverage all that into generating
a full test of the dump_symbols code.