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. 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? 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20170310/b1846470/attachment.html>
> 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 <mailto: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 <mailto: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-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20170309/3c00de96/attachment.html>
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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20170310/0bcc2836/attachment.html>