MinGW is GCC-like and does not support clang-cl, so clean up the lit cfg
to reflect that. Also mark all Windows test cases using clang-cl as
UNSUPPORTED for now. We should probably adapt most of these test cases
to use the GCC-like clang driver, but that will be for later.
Differential Revision: https://reviews.llvm.org/D147057
Previously, ASan would produce reports like this:
ERROR: AddressSanitizer: breakpoint on unknown address 0x000000000000 (pc 0x7fffdd7c5e86 ...)
This is unhelpful, because the developer may think this is a null
pointer dereference, and not a breakpoint exception on some PC.
The cause was that SignalContext::GetAddress would read the
ExceptionInformation array to retreive an address for any kind of
exception. That data is only available for access violation exceptions.
This changes it to be conditional on the exception type, and to use the
PC otherwise.
I added a variety of tests for common exception types:
- int div zero
- breakpoint
- ud2a / illegal instruction
- SSE misalignment
I also tightened up IsMemoryAccess and GetWriteFlag to check the
ExceptionCode rather than looking at ExceptionInformation[1] directly.
Differential Revision: https://reviews.llvm.org/D92344
