1229602 - Evaluate clang SanitizerCover for gathering coverage of Firefox tests

Status: NEW

(Testing :: Code Coverage, defect)

Description

[Chris Manchester (limited bugmail, email directly)]

Clang's new SanitizerCoverage tool looks very promising: http://clang.llvm.org/docs/SanitizerCoverage.html

I'm particularly interested in http://clang.llvm.org/docs/SanitizerCoverage.html#sudden-death -- the problem of losing coverage when a process is signalled is a problem in multi-process gecko.

Comment 1

[Jed Davis [:jld] ⟨⏰|UTC-7⟩ ⟦he/him⟧]

FYI: For processes that use sandboxing, there's a hook for the sandboxing code to call so the coverage runtime can pre-open any files it needs, etc., before permissions are reduced.   I set that up for Linux (GeckoMediaPlugin) and B2G (content) a while ago, ifdef MOZ_ASAN, but I never tested it.  Mac and Windows I think don't have it at all yet, so there might be breakage there.