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

[Dmitry Vyukov]

On Fri, Nov 2, 2012 at 4:51 AM, Richard Smith <richard at metafoo.co.uk> wrote:

> 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.
>

+Diego,David

And if/when we add MemorySanitizer, can we add new alias -fmemory-sanitizer?
I am asking because we are in the process of committing asan/tsan to gcc,
and we want to preserve consistency between clang and gcc. Gcc uses
-address/thread-sanitizer.
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