[llvm-dev] Asan self host problems: Failed to deallocate

[Kostya Serebryany via llvm-dev]

It would really help to have a clean repro steps.
I don't know how to extract them from CMakeCache :(

On Wed, Feb 15, 2017 at 1:09 PM, David Blaikie <dblaikie at gmail.com> wrote:

> I wish there was something like the line in config.log that would show the
> CMake command, but instead I can at least show you the CMakeCache files for
> my release build and asan build (attached to this email).
>
> No lld, so far as I know - believe I'm using gold at the moment for both
> builds.
>
> Did just reproduce this with a clean release build and a clean asanified
> build from that. Same errors. I used my previous release build (so,
> probably from a few days ago ToT) to build the current one.
>
>
> On Mon, Feb 13, 2017 at 4:17 PM Kostya Serebryany <kcc at google.com> wrote:
>
>> Looks weird.
>>
>> 1. Is LLD involved here somehow? Peter has just fixed an
>> asan-unfriendliness in LLD: https://reviews.llvm.org/rL294977, although
>> this reports does not look related.
>> 2. Could you provide the exact repro steps? (cmake, etc for both host and
>> bootstrap build)?
>>
>> --kcc
>>
>> On Fri, Feb 10, 2017 at 9:41 PM, David Blaikie <dblaikie at gmail.com>
>> wrote:
>>
>> Trying to run a self host "ninja check-clang" with ASan enabled I hit a
>> /lot/ of errors like this (strangely I hit none of these in check-llvm,
>> only in check-clang):
>>
>> Any ideas?
>>
>> ==10525==ERROR: AddressSanitizer failed to deallocate 0x10800 (67584)
>> bytes at address 0x631000014800
>>
>> ==10525==AddressSanitizer CHECK failed: /usr/local/google/home/
>> blaikie/dev/llvm/src/projects/compiler-rt/lib/sanitizer_common/sanitizer_posix.cc:143
>> "(("unable to unmap" && 0)) != (0)" (0x0, 0x0)
>>
>>     #0 0x51f42f in __asan::AsanCheckFailed(char const*, int, char
>> const*, unsigned long long, unsigned long long) /usr/local/google/home/
>> blaikie/dev/llvm/src/projects/compiler-rt/lib/asan/asan_rtl.cc:69:3
>>
>>     #1 0x532eff in __sanitizer::CheckFailed(char const*, int, char
>> const*, unsigned long long, unsigned long long) /usr/local/google/home/
>> blaikie/dev/llvm/src/projects/compiler-rt/lib/sanitizer_
>> common/sanitizer_termination.cc:79:5
>>
>>     #2 0x52cf61 in __sanitizer::UnmapOrDie(void*, unsigned long)
>> /usr/local/google/home/blaikie/dev/llvm/src/projects/
>> compiler-rt/lib/sanitizer_common/sanitizer_posix.cc:143:5
>>
>>     #3 0x53877f in __sanitizer::UnsetAlternateSignalStack()
>> /usr/local/google/home/blaikie/dev/llvm/src/projects/
>> compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cc:186:3
>>
>>     #4 0x5209f5 in __asan::AsanThread::Destroy() /usr/local/google/home/
>> blaikie/dev/llvm/src/projects/compiler-rt/lib/asan/asan_thread.cc:110:40
>>
>>     #5 0x7fd75802df81 in __nptl_deallocate_tsd
>> /build/eglibc-oGUzwX/eglibc-2.19/nptl/pthread_create.c:158
>>
>>     #6 0x7fd75802e196 in start_thread /build/eglibc-oGUzwX/eglibc-2.
>> 19/nptl/pthread_create.c:325
>>
>>     #7 0x7fd744ee337c in clone /build/eglibc-oGUzwX/eglibc-2.
>> 19/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:111
>>
>>
>>
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