Martin Storsjö
c6f48859d8
These helpers are statically linked into each DLL/EXE that uses them. They are primarily used for atomic access to variables that are larger than what the platform natively can support - i.e. primarily for accessing atomic variables larger than 8 bytes. The fallback implementations rely on explicit locks (spinlocks in practice). As the locks are statically linked into each module that uses the atomic variable, any concurrent access to such an atomic variable from two different DLLs/EXEs wouldn't actually end up being properly atomic. However cross-module atomic variables (larger than 8 bytes) is very rare so this isn't deemed to be much of a practical issue. In GCC based toolchains, the corresponding helpers reside in a separate shared library, libatomic-1.dll (although it can also be linked statically).
133 lines
4.2 KiB
Bash
Executable File
133 lines
4.2 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2018 Martin Storsjo
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#
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# Permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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set -e
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SRC_DIR=../lib/builtins
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BUILD_SUFFIX=
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BUILD_BUILTINS=TRUE
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ENABLE_CFGUARD=1
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CFGUARD_CFLAGS="-mguard=cf"
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while [ $# -gt 0 ]; do
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if [ "$1" = "--build-sanitizers" ]; then
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SRC_DIR=..
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BUILD_SUFFIX=-sanitizers
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SANITIZERS=1
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BUILD_BUILTINS=FALSE
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# Override the default cfguard options here; this unfortunately
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# also overrides the user option if --enable-cfguard is passed
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# before --build-sanitizers (although that combination isn't
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# really intended/supported anyway).
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CFGUARD_CFLAGS=
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ENABLE_CFGUARD=
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elif [ "$1" = "--enable-cfguard" ]; then
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CFGUARD_CFLAGS="-mguard=cf"
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ENABLE_CFGUARD=1
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elif [ "$1" = "--disable-cfguard" ]; then
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CFGUARD_CFLAGS=
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ENABLE_CFGUARD=
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else
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PREFIX="$1"
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fi
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shift
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done
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if [ -z "$PREFIX" ]; then
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echo "$0 [--build-sanitizers] [--enable-cfguard|--disable-cfguard] dest"
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exit 1
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fi
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if [ -n "$SANITIZERS" ] && [ -n "$ENABLE_CFGUARD" ]; then
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echo "warning: Sanitizers may not work correctly with Control Flow Guard enabled." 1>&2
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fi
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mkdir -p "$PREFIX"
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PREFIX="$(cd "$PREFIX" && pwd)"
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export PATH="$PREFIX/bin:$PATH"
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: ${ARCHS:=${TOOLCHAIN_ARCHS-i686 x86_64 armv7 aarch64}}
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ANY_ARCH=$(echo $ARCHS | awk '{print $1}')
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CLANG_RESOURCE_DIR="$("$PREFIX/bin/$ANY_ARCH-w64-mingw32-clang" --print-resource-dir)"
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if [ ! -d llvm-project/compiler-rt ] || [ -n "$SYNC" ]; then
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CHECKOUT_ONLY=1 ./build-llvm.sh
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fi
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if command -v ninja >/dev/null; then
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CMAKE_GENERATOR="Ninja"
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else
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: ${CORES:=$(nproc 2>/dev/null)}
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: ${CORES:=$(sysctl -n hw.ncpu 2>/dev/null)}
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: ${CORES:=4}
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case $(uname) in
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MINGW*)
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CMAKE_GENERATOR="MSYS Makefiles"
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;;
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esac
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fi
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cd llvm-project/compiler-rt
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for arch in $ARCHS; do
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if [ -n "$SANITIZERS" ]; then
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case $arch in
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i686|x86_64)
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# Sanitizers on windows only support x86.
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;;
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*)
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continue
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;;
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esac
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fi
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[ -z "$CLEAN" ] || rm -rf build-$arch$BUILD_SUFFIX
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mkdir -p build-$arch$BUILD_SUFFIX
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cd build-$arch$BUILD_SUFFIX
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[ -n "$NO_RECONF" ] || rm -rf CMake*
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cmake \
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${CMAKE_GENERATOR+-G} "$CMAKE_GENERATOR" \
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-DCMAKE_BUILD_TYPE=Release \
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-DCMAKE_INSTALL_PREFIX="$CLANG_RESOURCE_DIR" \
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-DCMAKE_C_COMPILER=$arch-w64-mingw32-clang \
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-DCMAKE_CXX_COMPILER=$arch-w64-mingw32-clang++ \
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-DCMAKE_SYSTEM_NAME=Windows \
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-DCMAKE_AR="$PREFIX/bin/llvm-ar" \
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-DCMAKE_RANLIB="$PREFIX/bin/llvm-ranlib" \
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-DCMAKE_C_COMPILER_WORKS=1 \
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-DCMAKE_CXX_COMPILER_WORKS=1 \
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-DCMAKE_C_COMPILER_TARGET=$arch-w64-windows-gnu \
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-DCOMPILER_RT_DEFAULT_TARGET_ONLY=TRUE \
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-DCOMPILER_RT_USE_BUILTINS_LIBRARY=TRUE \
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-DCOMPILER_RT_BUILD_BUILTINS=$BUILD_BUILTINS \
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-DCOMPILER_RT_EXCLUDE_ATOMIC_BUILTIN=FALSE \
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-DLLVM_CONFIG_PATH="" \
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-DCMAKE_FIND_ROOT_PATH=$PREFIX/$arch-w64-mingw32 \
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-DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY \
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-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ONLY \
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-DSANITIZER_CXX_ABI=libc++ \
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-DCMAKE_C_FLAGS_INIT="$CFGUARD_CFLAGS" \
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-DCMAKE_CXX_FLAGS_INIT="$CFGUARD_CFLAGS" \
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$SRC_DIR
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cmake --build . ${CORES:+-j${CORES}}
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cmake --install .
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mkdir -p "$PREFIX/$arch-w64-mingw32/bin"
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if [ -n "$SANITIZERS" ]; then
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mv "$CLANG_RESOURCE_DIR/lib/windows/"*.dll "$PREFIX/$arch-w64-mingw32/bin"
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fi
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cd ..
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done
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