1 /*===- StandaloneFuzzTargetMain.c - standalone main() for fuzz targets. ---===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 // This main() function can be linked to a fuzz target (i.e. a library
10 // that exports LLVMFuzzerTestOneInput() and possibly LLVMFuzzerInitialize())
11 // instead of libFuzzer. This main() function will not perform any fuzzing
12 // but will simply feed all input files one by one to the fuzz target.
13 //
14 // Use this file to provide reproducers for bugs when linking against libFuzzer
15 // or other fuzzing engine is undesirable.
16 //===----------------------------------------------------------------------===*/
17 #include <assert.h>
18 #include <stdio.h>
19 #include <stdlib.h>
20
21 extern int LLVMFuzzerTestOneInput(const unsigned char *data, size_t size);
22 __attribute__((weak)) extern int LLVMFuzzerInitialize(int *argc, char ***argv);
main(int argc,char ** argv)23 int main(int argc, char **argv) {
24 fprintf(stderr, "StandaloneFuzzTargetMain: running %d inputs\n", argc - 1);
25 if (LLVMFuzzerInitialize)
26 LLVMFuzzerInitialize(&argc, &argv);
27 for (int i = 1; i < argc; i++) {
28 fprintf(stderr, "Running: %s\n", argv[i]);
29 FILE *f = fopen(argv[i], "r");
30 assert(f);
31 fseek(f, 0, SEEK_END);
32 size_t len = ftell(f);
33 fseek(f, 0, SEEK_SET);
34 unsigned char *buf = (unsigned char*)malloc(len);
35 size_t n_read = fread(buf, 1, len, f);
36 assert(n_read == len);
37 LLVMFuzzerTestOneInput(buf, len);
38 free(buf);
39 fprintf(stderr, "Done: %s: (%zd bytes)\n", argv[i], n_read);
40 }
41 }
42