[cfe-commits] [PATCH] Add -fsanitize= command line argument to control -fcatch-undefined-behavior, -faddress-sanitizer, and -fthread-sanitizer

[Richard Smith]

Hi,

The attached patch series adds a
-fsanitize=sanitizer1,sanitizer2,sanitizer3 command-line option to
Clang (and a corresponding -fno-sanitize=...). This works as follows
for the driver options:

  -faddress-sanitizer becomes a synonym for -fsanitize=address
  -fno-address-sanitizer becomes a synonym for -fno-sanitize=address
  -fthread-sanitizer becomes a synonym for -fsanitize=thread
  -fno-thread-sanitizer becomes a synonym for -fno-sanitize=thread
  -fcatch-undefined-behavior becomes a synonym for -fsanitize=undefined
  -fsanitize=undefined is expanded by the driver into a list of
individual undefined behavior sanitizers

The -cc1 interface is deliberately very simplistic: it loses support
for the existing flags, and instead only supports -fsanitize=..., and
only supports naming the individual checks (and not groups like
-fsanitize=undefined).

Patch 1 just renames the existing ASan and TSan LangOptions to follow
the naming convention used by the later patches.
Patch 2 adds support to the driver and frontend for parsing
-fsanitize, converting the other options to it, and filling in
LangOptions.
Patch 3 uses the -fsanitize=... values to enable/disable the existing
-fcatch-undefined-behavior checks, and removes frontend support for
the other options.

Please review! I'd like to get this in for the 3.2 release.

Thanks!
Richard
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