vitalybuka added inline comments.
================
Comment at: llvm/include/llvm/IR/Intrinsics.td:1640
+def int_asan_check_memaccess :
+ Intrinsic<[],[llvm_ptr_ty, llvm_i8_ty, llvm_i8_ty],
----------------
pcc wrote:
> eugenis wrote:
> > vitalybuka wrote:
> > > kstoimenov wrote:
> > > > vitalybuka wrote:
> > > > > vitalybuka wrote:
> > > > > > PTAL at lvm.read_register.i32
> > > > > >
> > > > > > How about:
> > > > > >
> > > > > > llvm.asan.check.memaccess ->
> > > > > > lvm.asan.check_read
> > > > > > lvm.asan.check_write
> > > > > > lvm.asan.kernel.check_read
> > > > > > lvm.asan.kernel.check_write
> > > > > >
> > > > > > Even better
> > > > > > lvm.asan.check_read.{i8, i16, i32, ...}
> > > > > > lvm.asan.check_write.{i8, i16, i32, ...}
> > > > > > lvm.asan.kernel.check_read.{i8, i16, i32, ...}
> > > > > > lvm.asan.kernel.check_write.{i8, i16, i32, ...}
> > > > > >
> > > > > Looks like underscore is not used in intrinsic names, so essentially
> > > > > the same with dots.
> > > > Sounds good to me. I do the full expansion so there will be 20
> > > > intrinsics altogether. I will update the code and ping you when done.
> > > @pcc @eugenis
> > > WDYT, I think later we can do the same for HWASAN?
> > I don't see what these multiple intrinsics give us that a single memaccess
> > one does not provide?
> >
> > As long as access type and similar arguments are immediates.
> >
> Agree with @eugenis - these sorts of intrinsic variants are typically used
> for distinguishing different pointer element types and we're in the process
> of getting rid of those anyway.
@pcc @eugenis Then do you prefer to encode is_write+size+kernel into non-human
unreadable AccessInfo, like hwasan, or separate 0/1 arguments.
I probably prefer AccessInfo, as they both unreadable, but the hwasan version
is shorter.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D107850/new/
https://reviews.llvm.org/D107850
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