[PATCH] D54099: [Sanitizers] Disable SANITIZER_CAN_FAST_UNWIND on all SPARC targets

[Rainer Orth via Phabricator via llvm-commits]

ro added a comment.

In https://reviews.llvm.org/D54099#1293960, @krytarowski wrote:

> There is also sparc and sparc64 support in sanitizers on NetBSD... but I cannot say for now how well it works. For sure we run UBSan and ASan for both of them.


I still wonder how this works, though: I've just refreshed my patch for SPARC support in compiler-rt (https://reviews.llvm.org/D40900) and tried
again with patches on top to enable asan on 32-bit sparc in clang and the 32-bit asan tests in compiler-rt (trivial, but not submitted as pointless).

I immediately ran again into build failures of the compiler-rt asan tests:

fatal error: error in backend: Function "main": over-aligned dynamic alloca not supported.
clang-8: error: clang frontend command failed with exit code 70 (use -v to see invocation)

just the same as when I initially had submitted https://reviews.llvm.org/D40900.  If you have a way around this, I'm all ears ;-)

I cannot reasonably try sparcv9 on Solaris, though, due to the particular address space layout used there.

However, as I mentioned since about a week an implementation of the TARGET_ASAN_SHADOW_OFFSET hook for sparc has landed in
gcc mainline, where asan works reasonably well.

ubsan should be no problem, admittedly.


Repository:
  rL LLVM

https://reviews.llvm.org/D54099