59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
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* General driver to allow command-line fuzzer (i.e. afl) to
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* exercise the libFuzzer entrypoint.
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*/
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#include <sys/types.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define kMaxAflInputSize (1 << 20)
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static unsigned char afl_buffer[kMaxAflInputSize];
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#ifdef __AFL_LOOP
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/* If we are built with afl-clang-fast, use persistent mode */
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#define KEEP_FUZZING(count) __AFL_LOOP(1000)
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#else
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/* If we are built with afl-clang, execute each input once */
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#define KEEP_FUZZING(count) ((count) < 1)
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#endif
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/* In ares-test-fuzz.c: */
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int LLVMFuzzerTestOneInput(const unsigned char *data, unsigned long size);
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static void ProcessFile(int fd) {
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ssize_t count = read(fd, afl_buffer, kMaxAflInputSize);
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/*
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* Make a copy of the data so that it's not part of a larger
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* buffer (where buffer overflows would go unnoticed).
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*/
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unsigned char *copied_data = (unsigned char *)malloc(count);
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LLVMFuzzerTestOneInput(copied_data, count);
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free(copied_data);
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}
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int main(int argc, char *argv[]) {
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if (argc == 1) {
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int count = 0;
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while (KEEP_FUZZING(count)) {
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ProcessFile(fileno(stdin));
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count++;
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}
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} else {
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int ii;
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for (ii = 1; ii < argc; ++ii) {
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int fd = open(argv[ii], O_RDONLY);
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if (fd < 0) {
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fprintf(stderr, "Failed to open '%s'\n", argv[ii]);
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continue;
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}
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ProcessFile(fd);
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close(fd);
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}
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}
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return 0;
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}
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