1*a7c257b0Skamil /*===- StandaloneFuzzTargetMain.c - standalone main() for fuzz targets. ---===//
2*a7c257b0Skamil //
3*a7c257b0Skamil // The LLVM Compiler Infrastructure
4*a7c257b0Skamil //
5*a7c257b0Skamil // This file is distributed under the University of Illinois Open Source
6*a7c257b0Skamil // License. See LICENSE.TXT for details.
7*a7c257b0Skamil //
8*a7c257b0Skamil //===----------------------------------------------------------------------===//
9*a7c257b0Skamil // This main() function can be linked to a fuzz target (i.e. a library
10*a7c257b0Skamil // that exports LLVMFuzzerTestOneInput() and possibly LLVMFuzzerInitialize())
11*a7c257b0Skamil // instead of libFuzzer. This main() function will not perform any fuzzing
12*a7c257b0Skamil // but will simply feed all input files one by one to the fuzz target.
13*a7c257b0Skamil //
14*a7c257b0Skamil // Use this file to provide reproducers for bugs when linking against libFuzzer
15*a7c257b0Skamil // or other fuzzing engine is undesirable.
16*a7c257b0Skamil //===----------------------------------------------------------------------===*/
17*a7c257b0Skamil #include <assert.h>
18*a7c257b0Skamil #include <stdio.h>
19*a7c257b0Skamil #include <stdlib.h>
20*a7c257b0Skamil
21*a7c257b0Skamil extern int LLVMFuzzerTestOneInput(const unsigned char *data, size_t size);
22*a7c257b0Skamil __attribute__((weak)) extern int LLVMFuzzerInitialize(int *argc, char ***argv);
main(int argc,char ** argv)23*a7c257b0Skamil int main(int argc, char **argv) {
24*a7c257b0Skamil fprintf(stderr, "StandaloneFuzzTargetMain: running %d inputs\n", argc - 1);
25*a7c257b0Skamil if (LLVMFuzzerInitialize)
26*a7c257b0Skamil LLVMFuzzerInitialize(&argc, &argv);
27*a7c257b0Skamil for (int i = 1; i < argc; i++) {
28*a7c257b0Skamil fprintf(stderr, "Running: %s\n", argv[i]);
29*a7c257b0Skamil FILE *f = fopen(argv[i], "r");
30*a7c257b0Skamil assert(f);
31*a7c257b0Skamil fseek(f, 0, SEEK_END);
32*a7c257b0Skamil size_t len = ftell(f);
33*a7c257b0Skamil fseek(f, 0, SEEK_SET);
34*a7c257b0Skamil unsigned char *buf = (unsigned char*)malloc(len);
35*a7c257b0Skamil size_t n_read = fread(buf, 1, len, f);
36*a7c257b0Skamil assert(n_read == len);
37*a7c257b0Skamil LLVMFuzzerTestOneInput(buf, len);
38*a7c257b0Skamil free(buf);
39*a7c257b0Skamil fprintf(stderr, "Done: %s: (%zd bytes)\n", argv[i], n_read);
40*a7c257b0Skamil }
41*a7c257b0Skamil }
42