[compiler-rt] r220571 - tsan: support mmap(MAP_32BIT)

[Dmitry Vyukov]

Do you mean linux/C++ and 0x020000000000 - 0x100000000000 memory range?
If so, I don't see what is broken.
I've added the following debug output:

+  Printf("kShadowBeg=%p kHiAppMemBeg=%p shadow=%p ok=%d\n",
+      kShadowBeg, kHiAppMemBeg, MemToShadow(kHiAppMemBeg),
IsShadowMem(MemToShadow(kHiAppMemBeg)));

and it prints:

kShadowBeg=0x020000000000 kHiAppMemBeg=0x7e8000000000 shadow=0x020000000000 ok=1



On Mon, Jan 12, 2015 at 9:28 PM, Alexey Samsonov <vonosmas at gmail.com> wrote:
> Take a closer look at tsan_platform.h
>
> MemToShadow() doesn't map all the user memory regions into expected
> 0x0200000000 - 0x1000000000 range.
> That is, IsShadowMem(MemToShadow(kHiAppMemBeg)) == false.
>
> On Mon, Jan 12, 2015 at 7:25 AM, Dmitry Vyukov <dvyukov at google.com> wrote:
>>
>> What is the problem with TSAN_SHADOW_COUNT != 4? I do not see what has
>> changed wrt TSAN_SHADOW_COUNT.
>>
>> On Tue, Jan 6, 2015 at 5:25 AM, Alexey Samsonov <vonosmas at gmail.com>
>> wrote:
>> > After this change TSan can only work with TSAN_SHADOW_COUNT=4.
>> > Do we plan to keep support for another values, or it's fine to just drop
>> > them?
>> >
>> > On Sat, Oct 25, 2014 at 2:25 AM, Dmitry Vyukov <dvyukov at google.com>
>> > wrote:
>> >>
>> >> On Sat, Oct 25, 2014 at 1:17 AM, Kostya Serebryany <kcc at google.com>
>> >> wrote:
>> >> > Nice!
>> >> > Please also update the docs (where relevant).
>> >> > Do we need to remove -PIE from the driver now?
>> >>
>> >> There is no immediate need for any changes.
>> >> We can remove pie just to match gcc and asan, though. But I am sure
>> >> that such change will cause a new splash of complains that something
>> >> broke in some weird setups...
>> >> _______________________________________________
>> >> llvm-commits mailing list
>> >> llvm-commits at cs.uiuc.edu
>> >> http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
>> >
>> >
>> >
>> >
>> > --
>> > Alexey Samsonov
>> > vonosmas at gmail.com
>
>
>
>
> --
> Alexey Samsonov
> vonosmas at gmail.com