//===--- mlir-bytecode-parser-fuzzer.cpp - Entry point to parser fuzzer ---===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // Implementation of main so we can build and test without linking libFuzzer. // //===----------------------------------------------------------------------===// #include "mlir/IR/BuiltinOps.h" #include "mlir/IR/Diagnostics.h" #include "mlir/IR/MLIRContext.h" #include "mlir/Parser/Parser.h" #include "llvm/ADT/StringRef.h" #include "llvm/Support/Compiler.h" using namespace mlir; extern "C" LLVM_ATTRIBUTE_USED int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { // Skip empty inputs. if (size <= 1 || data[size - 1] != 0) return -1; llvm::StringRef str(reinterpret_cast(data), size - 1); // Skip if not bytecode. if (!str.starts_with("ML\xefR")) return -1; // Create a null-terminated memory buffer from the input. DialectRegistry registry; MLIRContext context(registry); context.allowUnregisteredDialects(); // Register diagnostic handler to avoid triggering exit behavior. context.getDiagEngine().registerHandler( [](mlir::Diagnostic &diag) { return; }); // Parse module. The parsed module isn't used, so it is discarded post parse // (successful or failure). The returned module is wrapped in a unique_ptr // such that it is freed upon exit if returned. (void)parseSourceString(str, &context); return 0; } extern "C" LLVM_ATTRIBUTE_USED int llvmFuzzerInitialize(int *argc, char ***argv) { return 0; }