[all-commits] [llvm/llvm-project] 46df20: [sanitizer] Add TryMemCpy (#112668)

[Vitaly Buka via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 46df20ab63ee8c14c5d4eef07e2a7cccd466c064
      https://github.com/llvm/llvm-project/commit/46df20ab63ee8c14c5d4eef07e2a7cccd466c064
  Author: Vitaly Buka <vitalybuka at google.com>
  Date:   2024-10-17 (Thu, 17 Oct 2024)

  Changed paths:
    M compiler-rt/lib/sanitizer_common/sanitizer_common.h
    M compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cpp
    M compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
    M compiler-rt/lib/sanitizer_common/sanitizer_win.cpp
    M compiler-rt/lib/sanitizer_common/tests/sanitizer_posix_test.cpp

  Log Message:
  -----------
  [sanitizer] Add TryMemCpy (#112668)

For posix implementation is similar to
`IsAccessibleMemoryRange`, using `pipe`.

We need this because we can't rely on non-atomic
`IsAccessibleMemoryRange` + `memcpy`, as the
protection or mapping may change and we may
crash.



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