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