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80 lines
3.2 KiB
C++
80 lines
3.2 KiB
C++
//===-- FuzzerCLI.h - Common logic for CLIs of fuzzers ----------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Common logic needed to implement LLVM's fuzz targets' CLIs - including LLVM
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// concepts like cl::opt and libFuzzer concepts like -ignore_remaining_args=1.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_FUZZMUTATE_FUZZERCLI_H
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#define LLVM_FUZZMUTATE_FUZZERCLI_H
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/Support/DataTypes.h"
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namespace llvm {
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class StringRef;
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/// Parse cl::opts from a fuzz target commandline.
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///
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/// This handles all arguments after -ignore_remaining_args=1 as cl::opts.
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void parseFuzzerCLOpts(int ArgC, char *ArgV[]);
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/// Handle backend options that are encoded in the executable name.
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///
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/// Parses some common backend options out of a specially crafted executable
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/// name (argv[0]). For example, a name like llvm-foo-fuzzer--aarch64-gisel
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/// might set up an AArch64 triple and the Global ISel selector. This should be
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/// called *before* parseFuzzerCLOpts if calling both.
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///
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/// This is meant to be used for environments like OSS-Fuzz that aren't capable
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/// of passing in command line arguments in the normal way.
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void handleExecNameEncodedBEOpts(StringRef ExecName);
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/// Handle optimizer options which are encoded in the executable name.
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/// Same semantics as in 'handleExecNameEncodedBEOpts'.
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void handleExecNameEncodedOptimizerOpts(StringRef ExecName);
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using FuzzerTestFun = int (*)(const uint8_t *Data, size_t Size);
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using FuzzerInitFun = int (*)(int *argc, char ***argv);
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/// Runs a fuzz target on the inputs specified on the command line.
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///
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/// Useful for testing fuzz targets without linking to libFuzzer. Finds inputs
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/// in the argument list in a libFuzzer compatible way.
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int runFuzzerOnInputs(int ArgC, char *ArgV[], FuzzerTestFun TestOne,
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FuzzerInitFun Init = [](int *, char ***) { return 0; });
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/// Fuzzer friendly interface for the llvm bitcode parser.
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///
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/// \param Data Bitcode we are going to parse
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/// \param Size Size of the 'Data' in bytes
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/// \return New module or nullptr in case of error
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std::unique_ptr<Module> parseModule(const uint8_t *Data, size_t Size,
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LLVMContext &Context);
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/// Fuzzer friendly interface for the llvm bitcode printer.
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///
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/// \param M Module to print
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/// \param Dest Location to store serialized module
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/// \param MaxSize Size of the destination buffer
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/// \return Number of bytes that were written. When module size exceeds MaxSize
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/// returns 0 and leaves Dest unchanged.
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size_t writeModule(const Module &M, uint8_t *Dest, size_t MaxSize);
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/// Try to parse module and verify it. May output verification errors to the
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/// errs().
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/// \return New module or nullptr in case of error.
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std::unique_ptr<Module> parseAndVerify(const uint8_t *Data, size_t Size,
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LLVMContext &Context);
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} // end llvm namespace
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#endif // LLVM_FUZZMUTATE_FUZZERCLI_H
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