[llvm-commits] PATCH: Sanitizer - add more sanity checks when starting external symbolizer subprocess

[Alexey Samsonov]

Hi!

This patch adds a couple of checks to sanitizer runtime <-> external
symbolizer communication, runtime library now checks:
1) that provided path to executable points to a valid file
2) that execl() was successful (and symbolizer didn't crash instantly).

Code review: https://codereview.appspot.com/6814106/

-- 
Alexey Samsonov, MSK
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