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build.sh
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#!/bin/bash -eux
#
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
################################################################################
if [ -n "${OSS_FUZZ_CI-}" ]; then
readonly FUZZERS=(\
llvm-dwarfdump-fuzzer \
)
else
# For coverage we skip "clangd-fuzzer" because it eats too much memory
# and the process gets killed.
if [[ "$SANITIZER" = coverage ]]; then
readonly FUZZERS=( \
llvm-microsoft-demangle-fuzzer \
llvm-dwarfdump-fuzzer \
llvm-itanium-demangle-fuzzer \
llvm-yaml-numeric-parser-fuzzer \
llvm-yaml-parser-fuzzer \
llvm-dlang-demangle-fuzzer \
vfabi-demangler-fuzzer \
llvm-rust-demangle-fuzzer \
llvm-dis-fuzzer \
llvm-opt-fuzzer \
llvm-isel-fuzzer \
llvm-special-case-list-fuzzer \
clang-objc-fuzzer \
clang-format-fuzzer \
clang-fuzzer \
llvm-parse-assembly-fuzzer \
llvm-symbol-reader-fuzzer \
llvm-object-yaml-fuzzer \
)
else
readonly FUZZERS=( \
llvm-microsoft-demangle-fuzzer \
llvm-dwarfdump-fuzzer \
llvm-itanium-demangle-fuzzer \
llvm-yaml-numeric-parser-fuzzer \
llvm-yaml-parser-fuzzer \
llvm-dlang-demangle-fuzzer \
vfabi-demangler-fuzzer \
llvm-rust-demangle-fuzzer \
llvm-dis-fuzzer \
llvm-opt-fuzzer \
llvm-isel-fuzzer \
llvm-special-case-list-fuzzer \
clang-objc-fuzzer \
clang-format-fuzzer \
clang-fuzzer \
clangd-fuzzer \
llvm-parse-assembly-fuzzer \
llvm-symbol-reader-fuzzer \
llvm-object-yaml-fuzzer \
)
fi
fi
# Fuzzers whose inputs are C-family source can use clang-fuzzer-dictionary.
readonly CLANG_DICT_FUZZERS=( \
clang-fuzzer \
clang-format-fuzzer \
clang-objc-fuzzer \
)
case $SANITIZER in
address) LLVM_SANITIZER="Address" ;;
undefined) LLVM_SANITIZER="Undefined" ;;
memory) LLVM_SANITIZER="MemoryWithOrigins" ;;
*) LLVM_SANITIZER="" ;;
esac
case "${LIB_FUZZING_ENGINE}" in
-fsanitize=fuzzer) CMAKE_FUZZING_CONFIG="-DLLVM_USE_SANITIZE_COVERAGE=ON" ;;
*) CMAKE_FUZZING_CONFIG="-DLLVM_LIB_FUZZING_ENGINE=${LIB_FUZZING_ENGINE}" ;;
esac
LLVM=llvm-project/llvm
mkdir build
cd build
cmake -GNinja -DCMAKE_BUILD_TYPE=Release ../$LLVM \
-DLLVM_ENABLE_PROJECTS="clang;lld;clang-tools-extra" \
-DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi;compiler-rt" \
-DLLVM_ENABLE_ASSERTIONS=ON \
-DLLVM_USE_LINKER=lld \
-DCMAKE_C_COMPILER="${CC}" \
-DCMAKE_CXX_COMPILER="${CXX}" \
-DCMAKE_C_FLAGS="${CFLAGS}" \
-DCMAKE_CXX_FLAGS="${CXXFLAGS}" \
"${CMAKE_FUZZING_CONFIG}" \
-DLLVM_NO_DEAD_STRIP=ON \
-DLLVM_USE_SANITIZER="${LLVM_SANITIZER}" \
-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly \
-DCOMPILER_RT_INCLUDE_TESTS=OFF
# Patch certain build rules in code coverage mode, as otherwise the process is killed.
# Verify we can build some of the troublesome rules by building them.
if [[ "$SANITIZER" = coverage ]]; then
mv build.ninja ../
python3 $SRC/coverage_patcher.py ../build.ninja build.ninja
ninja lib/Target/AMDGPU/Utils/CMakeFiles/LLVMAMDGPUUtils.dir/AMDGPUBaseInfo.cpp.o -j $(( $(nproc) / 2))
ninja lib/Target/AMDGPU/MCTargetDesc/CMakeFiles/LLVMAMDGPUDesc.dir/AMDGPUMCCodeEmitter.cpp.o -j $(( $(nproc) / 2))
fi
for fuzzer in "${FUZZERS[@]}"; do
# Limit workload in CI
if [ -n "${OSS_FUZZ_CI-}" ]; then
ninja $fuzzer -j 3
else
# Do not exhaust memory limitations on the cloud machine, coverage
# takes more resources which causes processes to crash.
if [[ "$SANITIZER" = coverage ]]; then
ninja $fuzzer -j $(( $(nproc) / 4)) || ninja $fuzzer -j 2 || ninja $fuzzer -j 1
else
ninja $fuzzer -j $(( $(nproc) / 4))
fi
fi
cp bin/$fuzzer $OUT
done
# Exit early in the CI as the llvm-isel-fuzzer and opt fuzzer won't be there.
if [ -n "${OSS_FUZZ_CI-}" ]; then
exit 0
fi
cp $OUT/llvm-isel-fuzzer $OUT/llvm-isel-fuzzer--hexagon-O2
cp $OUT/llvm-isel-fuzzer $OUT/llvm-isel-fuzzer--riscv64-O2
cp $OUT/llvm-isel-fuzzer $OUT/llvm-isel-fuzzer--mips64-O2
cp $OUT/llvm-isel-fuzzer $OUT/llvm-isel-fuzzer--arm-O2
cp $OUT/llvm-isel-fuzzer $OUT/llvm-isel-fuzzer--ppc64-O2
cp $OUT/llvm-isel-fuzzer $OUT/llvm-isel-fuzzer--aarch64-O2
cp $OUT/llvm-isel-fuzzer $OUT/llvm-isel-fuzzer--x86_64-O2
cp $OUT/llvm-isel-fuzzer $OUT/llvm-isel-fuzzer--wasm32-O2
cp $OUT/llvm-isel-fuzzer $OUT/llvm-isel-fuzzer--nvptx-O2
cp $OUT/llvm-isel-fuzzer $OUT/llvm-isel-fuzzer--ve-O2
cp $OUT/llvm-isel-fuzzer $OUT/llvm-isel-fuzzer--bpf-O2
mv $OUT/llvm-isel-fuzzer $OUT/llvm-isel-fuzzer--aarch64-gisel
# Same for llvm-opt-fuzzer
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-earlycse
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-simplifycfg
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-gvn
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-sccp
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-loop_predication
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-guard_widening
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-loop_vectorize
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-loop_unswitch
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-licm
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-indvars
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-strength_reduce
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-irce
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-dse
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-loop_idiom
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-reassociate
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-lower_matrix_intrinsics
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-memcpyopt
cp $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-sroa
mv $OUT/llvm-opt-fuzzer $OUT/llvm-opt-fuzzer--x86_64-instcombine
ninja clang-fuzzer-dictionary
for fuzzer in "${CLANG_DICT_FUZZERS[@]}"; do
bin/clang-fuzzer-dictionary > $OUT/$fuzzer.dict
done
zip -j "${OUT}/clang-objc-fuzzer_seed_corpus.zip" $SRC/$LLVM/../clang/tools/clang-fuzzer/corpus_examples/objc/*
zip -j "${OUT}/clangd-fuzzer_seed_corpus.zip" $SRC/$LLVM/../clang-tools-extra/clangd/test/*
zip -j "${OUT}/clang-fuzzer_seed_corpus.zip" $SRC/llvm-project/clang/test/Parser/*.cpp