On Fri, Feb 24, 2017 at 2:39 PM, Owen Waller <go-n...@kulawe.com> wrote: > Hi Dimitry, > > C++ ThreadSanitizer works on arm64. So making it work for Go should be > a modest amount of work. > > > Thanks for confirming this. Should I now Open a issue on Github so we can > track adding this?
If there is somebody who is willing to work on this, then yes. Otherwise, maybe. > Also, does it exist for any other platforms? There are hints of PPC64. What > about MIPS64? or any of the other platforms that Go supports (at least on > linux) - SPARC64? Supported platforms are enumerated in llvm/projects/compiler-rt/lib/tsan/rtl/tsan_platform.h I see x86_64, aarch64, mips64 and powerpc64 > ThreadSanitizer does not work on any 32-bit platforms. It assumes that > it can reserve huge continuous chunks of address space for various > things. > > > I have no idea how the ThreadSanitizer works, but can you clarify what you > mean by "huge"? > I'm coming at this from am embedded angle, So huge to me is a program that > swallows 10's of Megs of RAM. Tsan reserves 4X for shadow memory (where X is amount of memory where user data resides), 0.5X for another shadow memory, 1TB for heap and 128GB for thread info. You can see the details in llvm/projects/compiler-rt/lib/tsan/rtl/tsan_platform.h. > 32bit support would potentially also allow support on Android - on current > hardware. There are 64-bit androids already. I would rather test with tsan there. That's what we do for kernel ASAN. > ThreadSanitizer is not dependend on underlying hardware memory model, > it check against abstract language memory model. So even if you > production code runs on arm32, you can well test it for races on > x86_64. > > > Unfortunately I'm in a case where this isn't possible. I'm trying to make > sure that an library I am writing is go routine safe. The library itself > writes directly to the i2c bus on a Raspberry Pi to control an IC. The code > isn't ARM only (per say) but the hardware element means it is. Maybe it's possible to stub the i2c part? That would make testing much simpler regardless of tsan. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
