quickjs-tart

quickjs-based runtime for wallet-core logic
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ares-fuzz.c (2939B)

      1 /* MIT License
      2  *
      3  * Copyright (c) The c-ares project and its contributors
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining a copy
      6  * of this software and associated documentation files (the "Software"), to deal
      7  * in the Software without restriction, including without limitation the rights
      8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
      9  * copies of the Software, and to permit persons to whom the Software is
     10  * furnished to do so, subject to the following conditions:
     11  *
     12  * The above copyright notice and this permission notice (including the next
     13  * paragraph) shall be included in all copies or substantial portions of the
     14  * Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     22  * SOFTWARE.
     23  *
     24  * SPDX-License-Identifier: MIT
     25  */
     26 /*
     27  * General driver to allow command-line fuzzer (i.e. afl) to
     28  * exercise the libFuzzer entrypoint.
     29  */
     30 #include <stdio.h>
     31 
     32 #include <sys/types.h>
     33 #include <fcntl.h>
     34 #include <stdlib.h>
     35 #include <string.h>
     36 #ifdef _WIN32
     37 #  include <io.h>
     38 #else
     39 #  include <unistd.h>
     40 #endif
     41 
     42 #include "ares.h"
     43 
     44 #define kMaxAflInputSize (1 << 20)
     45 static unsigned char afl_buffer[kMaxAflInputSize];
     46 
     47 #ifdef __AFL_LOOP
     48 /* If we are built with afl-clang-fast, use persistent mode */
     49 #  define KEEP_FUZZING(count) __AFL_LOOP(1000)
     50 #else
     51 /* If we are built with afl-clang, execute each input once */
     52 #  define KEEP_FUZZING(count) ((count) < 1)
     53 #endif
     54 
     55 /* In ares-test-fuzz.c and ares-test-fuzz-name.c: */
     56 int LLVMFuzzerTestOneInput(const unsigned char *data, unsigned long size);
     57 
     58 static void ProcessFile(int fd)
     59 {
     60   ares_ssize_t count = read(fd, afl_buffer, kMaxAflInputSize);
     61   /*
     62    * Make a copy of the data so that it's not part of a larger
     63    * buffer (where buffer overflows would go unnoticed).
     64    */
     65   if (count > 0) {
     66     unsigned char *copied_data = (unsigned char *)malloc((size_t)count);
     67     memcpy(copied_data, afl_buffer, (size_t)count);
     68     LLVMFuzzerTestOneInput(copied_data, (size_t)count);
     69     free(copied_data);
     70   }
     71 }
     72 
     73 int main(int argc, char *argv[])
     74 {
     75   if (argc == 1) {
     76     int count = 0;
     77     while (KEEP_FUZZING(count)) {
     78 #ifndef STDIN_FILENO
     79       ProcessFile(fileno(stdin));
     80 #else
     81       ProcessFile(STDIN_FILENO);
     82 #endif
     83       count++;
     84     }
     85   } else {
     86     int ii;
     87     for (ii = 1; ii < argc; ++ii) {
     88       int fd = open(argv[ii], O_RDONLY);
     89       if (fd < 0) {
     90         fprintf(stderr, "Failed to open '%s'\n", argv[ii]);
     91         continue;
     92       }
     93       ProcessFile(fd);
     94       close(fd);
     95     }
     96   }
     97   return 0;
     98 }