[compiler-rt] r273260 - [asan] add primitives that allow coroutine implementations

Reid Kleckner via llvm-commits llvm-commits at lists.llvm.org
Wed Jun 22 09:16:00 PDT 2016


First build failing in this way is
http://lab.llvm.org:8011/builders/sanitizer-windows/builds/24302/

The blamelist looks innocuous, so this might be environmental. Guess I'll
look into it.

On Wed, Jun 22, 2016 at 8:42 AM, Dmitry Vyukov <dvyukov at google.com> wrote:

> On Wed, Jun 22, 2016 at 5:30 PM, Mike Aizatsky <aizatsky at google.com>
> wrote:
> > Dmitry,
> >
> > This still fails:
> >
> >
> http://lab.llvm.org:8011/builders/sanitizer-windows/builds/24385/steps/run%20tests/logs/stdio
>
>
> Humm... these failures look unrelated:
>
>
>
> C:\b\slave\sanitizer-windows\llvm\projects\compiler-rt\test\asan\TestCases\Windows\dll_intercept_memchr.cc:14:16:
> error: expected string not found in input
>
> // CHECK-NEXT: __asan_wrap_memchr
>
>                ^
>
> <stdin>:4:2: note: scanning from here
>
>  #0 0x6fb29518 in _asan_wrap_memchr
>
> (C:\b\slave\sanitizer-windows\build\lib\clang\3.9.0\lib\windows\clang_rt.asan_dynamic-i386.dll+0x10019518)
>
>  ^
>
> extern "C" __declspec(dllexport)
> int test_function() {
>   char buff[6] = "Hello";
>
>   memchr(buff, 'z', 7);
> // CHECK: AddressSanitizer: stack-buffer-overflow on address
> [[ADDR:0x[0-9a-f]+]]
> // CHECK: READ of size 7 at [[ADDR]] thread T0
> // CHECK-NEXT:  __asan_wrap_memchr
> // CHECK-NEXT:  memchr
> // CHECK-NEXT:  test_function {{.*}}dll_intercept_memchr.cc:[[@LINE-5]]
> // CHECK: Address [[ADDR]] is located in stack of thread T0 at offset
> {{.*}} in frame
> // CHECK-NEXT:  test_function {{.*}}dll_intercept_memchr.cc
> // CHECK: 'buff' <== Memory access at offset {{.*}} overflows this variable
>   return 0;
> }
>
>
>
> For some reason the function now has one underscore instead of two.
> +Reid, did anything change in the linker?
>
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