1 //===-- strcpy_fuzz.cpp ---------------------------------------------------===//
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 /// Fuzzing test for llvm-libc strcpy implementation.
10 ///
11 //===----------------------------------------------------------------------===//
12 #include "src/string/strcpy.h"
13 #include <stdint.h>
14 
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)15 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
16   // Validate input
17   if (!size) return 0;
18   if (data[size - 1] != '\0') return 0;
19   const char *src = (const char *)data;
20 
21   char *dest = new char[size];
22   if (!dest) __builtin_trap();
23 
24   __llvm_libc::strcpy(dest, src);
25 
26   size_t i;
27   for (i = 0; src[i] != '\0'; i++) {
28     // Ensure correctness of strcpy
29     if (dest[i] != src[i]) __builtin_trap();
30   }
31   // Ensure strcpy null terminates dest
32   if (dest[i] != src[i]) __builtin_trap();
33 
34   delete[] dest;
35 
36   return 0;
37 }
38 
39