1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
//===-- 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/main/include/benchmark/benchmark.h#L307-L345
asm volatile("" : : "r,m"(Info) : "memory");
return 0;
}
|
