In addition to all the OpenMP features supported with /openmp, /openmp:llvm adds support for the lastprivate clause on #pragma omp section s and unsigned index variables in parallel for loops. T arget the new runtime by using the new CL switch /openmp:llvm instead of /openmp. We’ve added the option to target the LLVM version of the OpenMP runtime.Updated error messages for shadow memory interleaving and interception failure to make problems and resolutions explicit.Updated handling of interception failures, added check for ASAN_WIN_CONTINUE_ON_INTERCEPTION_FAILURE environment variable to continue after interception failure.Added ASan interceptor support for GlobalAlloc and LocalAlloc moveable memory.Expanded RtlAllocateHeap support, fixed compatibility of RtlCreateHeap and RtlAllocateHeap interceptors with executable memory.Additional technical improvements include: We’re excited to be able to share these user-model improvements in this latest preview! More details will be available in the upcoming full ASan documentation as 16.9 approaches the final release. The compiler and linker also additionally will suggest emitting debug information if they detect you’re building with ASan but not emitting debug information. That vcasan lib is also found automatically, just like the other ASan libraries, when you throw /fsanitize=address. Address Sanitizer: The IDE integration for ASan-reported exceptions (vcasan.lib) now handles the complete collection of exceptions ASan can report.Here is a brief list of improvements for you to review.

In Visual Studio 2019 version 16.9 Preview 3 we have continued to improve the C++ backend with new features, new and improved optimizations, build throughput improvements, and better security.

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