Messages in this thread | | | Date | Thu, 14 May 2020 16:13:44 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH v5 00/18] Rework READ_ONCE() to improve codegen |
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On Wed, May 13, 2020 at 03:58:30PM +0200, Marco Elver wrote: > On Wed, 13 May 2020 at 15:24, Peter Zijlstra <peterz@infradead.org> wrote:
> > Also, could not this compiler instrumentation live as a kernel specific > > GCC-plugin instead of being part of GCC proper? Because in that case, > > we'd have much better control over it. > > I'd like it if we could make it a GCC-plugin for GCC, but how? I don't > see a way to affect TSAN instrumentation. FWIW Clang already has > distinguish-volatile support (unreleased Clang 11).
Ah, I figured not use the built-in TSAN at all, do a complete replacement of the instrumentation with a plugin. AFAIU plugins are able to emit instrumentation, but this isn't something I know a lot about.
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