Kostya Serebryany aed71a89bc Add experimental clang/driver flag -fsanitize-address-field-padding=N ...

Summary:
This change adds an experimental flag -fsanitize-address-field-padding=N (0, 1, 2)
to clang and driver. With this flag ASAN will be able to detect some cases of
intra-object-overflow bugs,
see https://code.google.com/p/address-sanitizer/wiki/IntraObjectOverflow

There is no actual functionality here yet, just the flag parsing.
The functionality is being reviewed at http://reviews.llvm.org/D5687

Test Plan: Build and run SPEC, LLVM Bootstrap, Chrome with this flag.

Reviewers: samsonov

Reviewed By: samsonov

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D5676

llvm-svn: 219417

2014-10-09 17:53:04 +00:00

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