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https://github.com/carbon-language/carbon-lang.git
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Chandler Carruth
268dd04511
This also allows us to default construct installs in an error state, which is useful for cases like fuzzers where we want to default construct a global, but then re-initilaize it That said, happy to consider alternative designs here.
54 lines
1.9 KiB
C++
54 lines
1.9 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "common/exe_path.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/VirtualFileSystem.h"
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#include "testing/fuzzing/libfuzzer.h"
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#include "toolchain/driver/driver.h"
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namespace Carbon::Testing {
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static const InstallPaths* install_paths = nullptr;
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// NOLINTNEXTLINE(readability-non-const-parameter): External API required types.
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extern "C" auto LLVMFuzzerInitialize(int* argc, char*** argv) -> int {
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CARBON_CHECK(*argc >= 1) << "Need the `argv[0]` value to initialize!";
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install_paths = new InstallPaths(
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InstallPaths::MakeForBazelRunfiles(FindExecutablePath((*argv)[0])));
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return 0;
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}
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// NOLINTNEXTLINE: Match the documented fuzzer entry point declaration style.
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extern "C" int LLVMFuzzerTestOneInput(const unsigned char* data,
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std::size_t size) {
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// Ignore large inputs.
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// TODO: See tokenized_buffer_fuzzer.cpp.
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if (size > 100000) {
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return 0;
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}
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static constexpr llvm::StringLiteral TestFileName = "test.carbon";
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llvm::vfs::InMemoryFileSystem fs;
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llvm::StringRef data_ref(reinterpret_cast<const char*>(data), size);
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CARBON_CHECK(fs.addFile(
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TestFileName, /*ModificationTime=*/0,
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llvm::MemoryBuffer::getMemBuffer(data_ref, /*BufferName=*/TestFileName,
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/*RequiresNullTerminator=*/false)));
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llvm::raw_null_ostream null_ostream;
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Driver driver(fs, install_paths, null_ostream, null_ostream);
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// TODO: Get checking to a point where it can handle invalid parse trees
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// without crashing.
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if (!driver.RunCommand({"compile", "--phase=parse", TestFileName}).success) {
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return 0;
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}
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driver.RunCommand({"compile", "--phase=check", TestFileName});
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return 0;
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}
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} // namespace Carbon::Testing
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