| 1 | /*===- StandaloneFuzzTargetMain.c - standalone main() for fuzz targets. ---===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // This main() function can be linked to a fuzz target (i.e. a library |
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| 9 | // that exports LLVMFuzzerTestOneInput() and possibly LLVMFuzzerInitialize()) |
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| 10 | // instead of libFuzzer. This main() function will not perform any fuzzing |
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| 11 | // but will simply feed all input files one by one to the fuzz target. |
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| 12 | // |
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| 13 | // Use this file to provide reproducers for bugs when linking against libFuzzer |
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| 14 | // or other fuzzing engine is undesirable. |
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| 15 | //===----------------------------------------------------------------------===*/ |
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| 16 | #include <assert.h> |
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| 17 | #include <stdio.h> |
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| 18 | #include <stdlib.h> |
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| 19 | |
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| 20 | extern int LLVMFuzzerTestOneInput(const unsigned char *data, size_t size); |
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| 21 | __attribute__((weak)) extern int LLVMFuzzerInitialize(int *argc, char ***argv); |
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| 22 | int main(int argc, char **argv) { |
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| 23 | fprintf(stderr, format: "StandaloneFuzzTargetMain: running %d inputs\n" , argc - 1); |
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| 24 | if (LLVMFuzzerInitialize) |
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| 25 | LLVMFuzzerInitialize(argc: &argc, argv: &argv); |
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| 26 | for (int i = 1; i < argc; i++) { |
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| 27 | fprintf(stderr, format: "Running: %s\n" , argv[i]); |
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| 28 | FILE *f = fopen(filename: argv[i], modes: "r" ); |
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| 29 | assert(f); |
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| 30 | fseek(stream: f, off: 0, SEEK_END); |
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| 31 | size_t len = ftell(stream: f); |
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| 32 | fseek(stream: f, off: 0, SEEK_SET); |
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| 33 | unsigned char *buf = (unsigned char*)malloc(size: len); |
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| 34 | size_t n_read = fread(ptr: buf, size: 1, n: len, stream: f); |
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| 35 | fclose(stream: f); |
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| 36 | assert(n_read == len); |
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| 37 | LLVMFuzzerTestOneInput(data: buf, size: len); |
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| 38 | free(ptr: buf); |
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| 39 | fprintf(stderr, format: "Done: %s: (%zd bytes)\n" , argv[i], n_read); |
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| 40 | } |
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| 41 | } |
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| 42 | |
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