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https://github.com/carbon-language/carbon-lang.git
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Chandler Carruth
4148161e24
This is in anticipation of making the integer value store be customized heavily. I'd like to extract it from the common code when doing that, so first disentangling them here without any intended change in functionality or behavior to enable that. I've tried to update `#include`s to be as minimal as I can and added a few missing includes spotted in the process. I've split the test for value store to include what was easy focused on just the value store templates rather than the unified shared value stores. This might surface some opportunities for adding more tests, but for this PR, just doing the minimal restructuring.
61 lines
2.3 KiB
C++
61 lines
2.3 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 <cstring>
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#include "common/check.h"
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#include "llvm/ADT/StringRef.h"
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#include "testing/fuzzing/libfuzzer.h"
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#include "toolchain/base/shared_value_stores.h"
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#include "toolchain/diagnostics/null_diagnostics.h"
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#include "toolchain/lex/lex.h"
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namespace Carbon::Testing {
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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: Investigate replacement with an error limit. Content with errors on
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// escaped quotes (`\"` repeated) have O(M * N) behavior for M errors in a
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// file length N, so either that will need to also be fixed or M will need to
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// shrink for large (1MB+) inputs.
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// This also affects parse/parse_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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auto source =
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SourceBuffer::MakeFromFile(fs, TestFileName, NullDiagnosticConsumer());
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SharedValueStores value_stores;
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auto buffer = Lex::Lex(value_stores, *source, NullDiagnosticConsumer());
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if (buffer.has_errors()) {
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return 0;
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}
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// Walk the lexed and tokenized buffer to ensure it isn't corrupt in some way.
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//
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// TODO: We should enhance this to do more sanity checks on the resulting
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// token stream.
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for (Lex::TokenIndex token : buffer.tokens()) {
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int line_number = buffer.GetLineNumber(token);
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CARBON_CHECK(line_number > 0, "Invalid line number!");
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CARBON_CHECK(line_number < INT_MAX, "Invalid line number!");
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int column_number = buffer.GetColumnNumber(token);
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CARBON_CHECK(column_number > 0, "Invalid line number!");
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CARBON_CHECK(column_number < INT_MAX, "Invalid line number!");
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}
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return 0;
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}
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} // namespace Carbon::Testing
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