llvm symbolizer is a more efficient symbolizer than addr2line, objdump,
etc.
In this cl, I 1)created a wrapper instance to interact with
llvm symbolizer, 2)made the stack script to use llvm symbolizer instance,
and then 3)added llvm symbolizer into isolated inputs.
The reland is to fix:
1UnboundLocalError: local variable 'code_addr' referenced before assignment
2AttributeError: 'module' object has no attribute 'ToolPath'
TBR=dpranke@chromium.org,agrieve@chromium.org
Bug: 774267
Change-Id: Iee626065e4cfe9403f9b13dfec2dfd99e749510c
Reviewed-on: https://chromium-review.googlesource.com/834754
Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Zhiling Huang <hzl@chromium.org>
Commit-Queue: Zhiling Huang <hzl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#526304}
ed89eb8fd9