1//===-- Template to diff single-input-single-output functions ---*- C++ -*-===//
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#ifndef LLVM_LIBC_FUZZING_MATH_SINGLE_INPUT_SINGLE_OUTPUT_DIFF_H
10#define LLVM_LIBC_FUZZING_MATH_SINGLE_INPUT_SINGLE_OUTPUT_DIFF_H
11
12#include "fuzzing/math/Compare.h"
13
14#include <stddef.h>
15#include <stdint.h>
16
17template <typename T> using SingleInputSingleOutputFunc = T (*)(T);
18
19template <typename T>
20void SingleInputSingleOutputDiff(SingleInputSingleOutputFunc<T> func1,
21 SingleInputSingleOutputFunc<T> func2,
22 const uint8_t *data, size_t size) {
23 if (size < sizeof(T))
24 return;
25
26 T x = *reinterpret_cast<const T *>(data);
27
28 T result1 = func1(x);
29 T result2 = func2(x);
30
31 if (!ValuesEqual(result1, result2))
32 __builtin_trap();
33}
34
35template <typename T1, typename T2>
36using SingleInputSingleOutputWithSideEffectFunc = T1 (*)(T1, T2 *);
37
38template <typename T1, typename T2>
39void SingleInputSingleOutputWithSideEffectDiff(
40 SingleInputSingleOutputWithSideEffectFunc<T1, T2> func1,
41 SingleInputSingleOutputWithSideEffectFunc<T1, T2> func2,
42 const uint8_t *data, size_t size) {
43 if (size < sizeof(T1))
44 return;
45
46 T1 x = *reinterpret_cast<const T1 *>(data);
47 T2 sideEffect1, sideEffect2;
48
49 T1 result1 = func1(x, &sideEffect1);
50 T1 result2 = func2(x, &sideEffect2);
51
52 if (!ValuesEqual(result1, result2))
53 __builtin_trap();
54
55 if (!ValuesEqual(sideEffect1, sideEffect2))
56 __builtin_trap();
57}
58
59#endif // LLVM_LIBC_FUZZING_MATH_SINGLE_INPUT_SINGLE_OUTPUT_DIFF_H
60

source code of libc/fuzzing/math/SingleInputSingleOutputDiff.h