[cfe-dev] i386 -faddress-sanitizer

[Carsten Mattner]

On Thu, Oct 18, 2012 at 3:29 PM, Alexander Potapenko wrote:
> Are you linking with ld or clang?
> -faddress-sanitizer is a Clang flag, so if you're running `ld $LDFLAGS
> ...` to link your program, it won't work.

clang.

> On Thu, Oct 18, 2012 at 5:12 PM, Carsten Mattner
> <carstenmattner at gmail.com> wrote:
>> On Thu, Oct 18, 2012 at 12:27 AM, Eli Friedman wrote:
>>> On Wed, Oct 17, 2012 at 1:43 PM, Carsten Mattner
>>> <carstenmattner at gmail.com> wrote:
>>>> Is it expected that -faddress-sanitizer  does not work on i386 and fails
>>>> to properly link resulting in errors like 'undefined symbol: __asan_init'
>>>> at runtime?
>>>>
>>>> I have ./lib/clang/3.2/lib/linux/libclang_rt.asan-i386.a in llvm's installation,
>>>> but it doesn't look like it's linked automatically into the executable.
>>>>
>>>> CFLAGS:
>>>> -faddress-sanitizer -O1 -fno-omit-frame-pointer -g $PROJECT_FLAGS
>>>
>>> You need to pass in -faddress-sanitizer both when compiling and when
>>> linking an application.  Try something like
>>> "LDFLAGS=-faddress-sanitizer".
>>
>> Oh that makes a lot of sense and is kind of obvious in hindsight.
>> Yet it didn't work in a quick test. Any options I flags to pass for
>> verbose printfs to see what's happening you can suggest?
>> In the next test I'll also try to explicitly link the libasan archive
>> manually for ruling out issues with that archive.
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>
>
>
> --
> Alexander Potapenko
> Software Engineer
> Google Moscow