[all-commits] [llvm/llvm-project] 51e91b: [libc++abi] Implement __cxa_init_primary_exception...

[itrofimow via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 51e91b64d0deb6a743861c2a0fba84865250036e
      https://github.com/llvm/llvm-project/commit/51e91b64d0deb6a743861c2a0fba84865250036e
  Author: itrofimow <i.trofimow at yandex.ru>
  Date:   2024-01-22 (Mon, 22 Jan 2024)

  Changed paths:
    M libcxx/benchmarks/CMakeLists.txt
    A libcxx/benchmarks/exception_ptr.bench.cpp
    M libcxx/docs/BuildingLibcxx.rst
    M libcxx/include/__availability
    M libcxx/include/__exception/exception_ptr.h
    M libcxx/include/new
    M libcxx/include/typeinfo
    M libcxx/lib/abi/arm64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist
    M libcxx/lib/abi/i686-linux-android21.libcxxabi.v1.stable.exceptions.nonew.abilist
    M libcxx/lib/abi/powerpc-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
    M libcxx/lib/abi/powerpc64-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
    M libcxx/lib/abi/x86_64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist
    M libcxx/lib/abi/x86_64-linux-android21.libcxxabi.v1.stable.exceptions.nonew.abilist
    M libcxx/lib/abi/x86_64-unknown-freebsd.libcxxabi.v1.stable.exceptions.nonew.abilist
    M libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.nonew.abilist
    M libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.noexceptions.nonew.abilist
    M libcxx/src/support/runtime/exception_pointer_cxxabi.ipp
    M libcxx/src/support/runtime/exception_pointer_glibcxx.ipp
    M libcxx/test/libcxx/transitive_includes/cxx03.csv
    M libcxx/test/libcxx/transitive_includes/cxx11.csv
    M libcxx/test/libcxx/transitive_includes/cxx14.csv
    M libcxx/test/libcxx/transitive_includes/cxx17.csv
    M libcxx/test/libcxx/transitive_includes/cxx20.csv
    M libcxx/test/libcxx/transitive_includes/cxx23.csv
    M libcxx/test/libcxx/transitive_includes/cxx26.csv
    M libcxxabi/include/cxxabi.h
    M libcxxabi/lib/exceptions.exp
    M libcxxabi/src/cxa_exception.cpp

  Log Message:
  -----------
  [libc++abi] Implement __cxa_init_primary_exception and use it to optimize std::make_exception_ptr (#65534)

This patch implements __cxa_init_primary_exception, an extension to the 
Itanium C++ ABI. This extension is already present in both libsupc++ and 
libcxxrt. This patch also starts making use of this function in 
std::make_exception_ptr: instead of going through a full throw/catch 
cycle, we are now able to initialize an exception directly, thus making 
std::make_exception_ptr around 30x faster.