[LLVMdev] Adding a stack probe function attribute

[John Kåre Alsaker]

Since David Majnemer doesn't seem overly eager to merge my patches,
let's see if we can't figure things out here.

I noticed a string function attribute appeared in LangRef.rst, would
that be the correct place to document this?

For reference:
http://reviews.llvm.org/D9653
http://reviews.llvm.org/D9654
http://reviews.llvm.org/D9858

On Wed, Aug 6, 2014 at 5:34 PM, John Kåre Alsaker
<john.mailinglists at gmail.com> wrote:
> I updated http://reviews.llvm.org/D4717 and also wrote an __probestack
> implementation:
> https://github.com/Zoxc/compiler-rt/compare/llvm-mirror:master...stprobe
>
> Which instruction would be the preferable one to probe with? I used OR since
> that's what GCC/libgcc does, but I don't see why that would be better than a
> write.
>
>
>
> On Tue, Aug 5, 2014 at 7:34 PM, Reid Kleckner <rnk at google.com> wrote:
>>
>> On Tue, Aug 5, 2014 at 8:53 AM, John Kåre Alsaker
>> <john.mailinglists at gmail.com> wrote:
>>>
>>> Would the __probestack functions be a suitable addition to compiler-rt?
>>> Does it already have __chkstk or is that provided by something else on
>>> Windows? I noticed that libgcc implemented them in cygwin.S.
>>
>>
>> It seems reasonable to put them in compiler-rt/lib/builtins.
>>
>> I don't think anyone is currently using compiler-rt's builtins on Windows,
>> so it doesn't have __chkstk. Typically that is provided by the Cygwin,
>> MinGW, or MSVC C runtime.
>
>