| 1 | //===--- mlir-text-parser-fuzzer.cpp - Entry point to parser fuzzer -------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
| 9 | // Implementation of main so we can build and test without linking libFuzzer. |
| 10 | // |
| 11 | //===----------------------------------------------------------------------===// |
| 12 | |
| 13 | #include "mlir/IR/BuiltinOps.h" |
| 14 | #include "mlir/IR/Diagnostics.h" |
| 15 | #include "mlir/IR/MLIRContext.h" |
| 16 | #include "mlir/Parser/Parser.h" |
| 17 | #include "llvm/ADT/StringRef.h" |
| 18 | #include "llvm/Support/Compiler.h" |
| 19 | |
| 20 | using namespace mlir; |
| 21 | |
| 22 | extern "C"LLVM_ATTRIBUTE_USED int LLVMFuzzerTestOneInput(const uint8_t *data, |
| 23 | size_t size) { |
| 24 | // Skip empty inputs. |
| 25 | if (size <= 1 || data[size - 1] != 0) |
| 26 | return -1; |
| 27 | llvm::StringRef str(reinterpret_cast<const char *>(data), size - 1); |
| 28 | // Skip if bytecode. |
| 29 | if (str.starts_with(Prefix: "ML\xefR")) |
| 30 | return -1; |
| 31 | |
| 32 | // Create a null-terminated memory buffer from the input. |
| 33 | DialectRegistry registry; |
| 34 | MLIRContext context(registry); |
| 35 | context.allowUnregisteredDialects(); |
| 36 | |
| 37 | // Register diagnostic handler to avoid triggering exit behavior. |
| 38 | context.getDiagEngine().registerHandler( |
| 39 | handler: [](mlir::Diagnostic &diag) { return; }); |
| 40 | |
| 41 | // Parse module. The parsed module isn't used, so it is discarded post parse |
| 42 | // (successful or failure). The returned module is wrapped in a unique_ptr |
| 43 | // such that it is freed upon exit if returned. |
| 44 | (void)parseSourceString<ModuleOp>(str, &context); |
| 45 | return 0; |
| 46 | } |
| 47 | |
| 48 | extern "C"LLVM_ATTRIBUTE_USED int llvmFuzzerInitialize(int *argc, |
| 49 | char ***argv) { |
| 50 | return 0; |
| 51 | } |
| 52 |