42 lines
1.7 KiB
C++
42 lines
1.7 KiB
C++
//===-- vfabi-demangler-fuzzer.cpp - Fuzzer VFABI using lib/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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Build tool to fuzz the demangler for the vector function ABI names.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/VectorUtils.h"
|
|
#include "llvm/AsmParser/Parser.h"
|
|
|
|
using namespace llvm;
|
|
|
|
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
|
|
LLVMContext Ctx;
|
|
SMDiagnostic Err;
|
|
const std::unique_ptr<Module> M =
|
|
parseAssemblyString("declare i32 @foo(i32 )\n", Err, Ctx);
|
|
const StringRef MangledName((const char *)Data, Size);
|
|
// Make sure that whatever symbol the demangler is operating on is
|
|
// present in the module (the signature is not important). This is
|
|
// because `tryDemangleForVFABI` fails if the function is not
|
|
// present. We need to make sure we can even invoke
|
|
// `getOrInsertFunction` because such method asserts on strings with
|
|
// zeroes.
|
|
if (!MangledName.empty() && MangledName.find_first_of(0) == StringRef::npos)
|
|
M->getOrInsertFunction(
|
|
MangledName,
|
|
FunctionType::get(Type::getVoidTy(M->getContext()), false));
|
|
const auto Info = VFABI::tryDemangleForVFABI(MangledName, *M);
|
|
|
|
// Do not optimize away the return value. Inspired by
|
|
// https://github.com/google/benchmark/blob/master/include/benchmark/benchmark.h#L307-L345
|
|
asm volatile("" : : "r,m"(Info) : "memory");
|
|
|
|
return 0;
|
|
}
|