[ +dvyukov ] On Thu, Feb 23, 2017 at 1:34 PM, Owen Waller <go-n...@kulawe.com> wrote: > Hi Ian, > > Go's race detector is based on and uses Thread Sanitizer, which has > only been implemented for amd64. I'm not aware of any effort to > extend thread sanitizer to other processors. That would have been > done before there is any likelihood of Go supporting it. > > Ian > > > Thanks for the help. > > After a little digging, the best I can come up with is that there might be > an AARCH64 port. That would cover ARM8 64-bit at least. > The reference I've found is on the thread sanitizer google group is, here: > https://groups.google.com/forum/#!searchin/thread-sanitizer/Port$20to$20ARMv7|sort:relevance/thread-sanitizer/14rRfPAr8vE/dJJ1fzrYAAAJ > [1] > Which leads to a discussion on llvm.org which suggests it's done( maybe...) > https://reviews.llvm.org/D11484 > > What would be the best way to confirm if the AArch64 support exists, as that > seems to be a prerequisite for at least an ARM8 race detector? > > I can't find any existing solution to the 32bit ARMs - v5, v6, v7. Thread > Sanitizer seems to need a whole heap of memory so there is a very real risk > out running out of RAM. But then the typical program sizes that these cores > run are much smaller. If we were talking in terms of programs that only used > 10s to 100's of Megs of RAM - you'd have a reasonably good chance of x5-10 > those amounts being free. So maybe there would be a case to try and port it > to 32 bit platforms, but I admit that is a much bigger question. > > Owen > > [1] This post may also be related as it discusses getting the thread > sanitizer running on a AMD AArch64 board with a 42 bit VA space. > https://groups.google.com/forum/#!searchin/thread-sanitizer/mips$20support%7Csort:relevance/thread-sanitizer/QQ3fOtA7qcM/tycOcC1jq3AJ > [2] There also seems to be PPC64 port too > https://groups.google.com/forum/#!searchin/thread-sanitizer/ppc$20support|sort:relevance/thread-sanitizer/D-ku2r5cDtU/BbFcY2Gf8qAJ > If this is also true then it also opens up using the race detector on the > PPC64 go ports. >
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