[llvm-dev] Modifying Address Sanitizer

[Aayushi Agrawal via llvm-dev]

I meant by "address sanitizer as a standalone" as testing address sanitizer
pass without compiling whole LLVM. But  I think I need to compile the whole
LLVM for the changes made.

Just being inquisitive to see what all possibilities are there :)

Thank you for your responses

On Fri, Mar 10, 2017 at 1:21 AM, Mehdi Amini <mehdi.amini at apple.com> wrote:

>
> On Mar 9, 2017, at 10:19 PM, Aayushi Agrawal <aayushigrwl1 at gmail.com>
> wrote:
>
> Thank you for the response.
>
> Suppose I want to make changes in the LLVM part of Address Sanitizer.
> Is there still a way to test the changes made to address sanitizer as a
> standalone.
>
>
> I don’t know what you mean by "address sanitizer as a standalone”. If you
> change LLVM you need to rebuild it (or clang).
>
> Also can a pass be run after Address Sanitizer Pass is ran, where I can
> access the variables created by address sanitizer [LLVM Code] so that I
> avoid making changes directly to the address sanitizer?
>
>
> Yes, but it may not be doable (or straightforward) to perform your logic
> separately as a post-pass, and you’ll still to build some infrastructure to
> be able to inject your pass at this point. I’m not sure what gain is
> expected from this, I’m missing the goal?
>
> —
> Mehdi
>
>
>
>
>
> On Fri, Mar 10, 2017 at 12:55 AM, Mehdi Amini <mehdi.amini at apple.com>
> wrote:
>
>>
>> > On Mar 9, 2017, at 9:25 PM, Aayushi Agrawal via llvm-dev <
>> llvm-dev at lists.llvm.org> wrote:
>> >
>> > Hello
>> >
>> > I am willing to make changes in Address Sanitizer for experimentation.
>> But as I am a naive user I am confused with the fact that if I make changes
>> to Address Sanitizer do I have to rebuild the whole LLVM.
>> >
>> > Could somebody please help me figure out a way in which I can make
>> changes to address sanitizer and do not have to compile the whole LLVM.
>>
>> It depends what kind of changes your doing and what kind of test you need
>> to perform I guess.
>> AFAIK, ASAN is split between a transformation in LLVM and a runtime in
>> compiler-rt.
>> Ultimately I expect that if you already have a build, and you need to
>> rebuild the runtime or clang after changing something in the code, the
>> incremental build should be “fast” (few seconds to a few tens of seconds).
>>
>> —
>> Mehdi
>>
>>
>
>
> --
> Aayushi Agrawal
> B.Tech(Final Year)
> Computer Science Engineering Undergraduate
> LNMIIT,JAIPUR
> Contact - 09649357639
>
>
>


-- 
Aayushi Agrawal
B.Tech(Final Year)
Computer Science Engineering Undergraduate
LNMIIT,JAIPUR
Contact - 09649357639
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