|
|
/*
|
|
|
* xdiff.cc - fuzzer harness for thirdparty/xdiff
|
|
|
*
|
|
|
* Copyright 2018, Google Inc.
|
|
|
*
|
|
|
* This software may be used and distributed according to the terms of
|
|
|
* the GNU General Public License, incorporated herein by reference.
|
|
|
*/
|
|
|
#include "thirdparty/xdiff/xdiff.h"
|
|
|
#include <inttypes.h>
|
|
|
#include <stdlib.h>
|
|
|
|
|
|
extern "C" {
|
|
|
|
|
|
int hunk_consumer(long a1, long a2, long b1, long b2, void *priv)
|
|
|
{
|
|
|
// TODO: probably also test returning -1 from this when things break?
|
|
|
return 0;
|
|
|
}
|
|
|
|
|
|
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
|
|
|
{
|
|
|
if (!Size) {
|
|
|
return 0;
|
|
|
}
|
|
|
// figure out a random point in [0, Size] to split our input.
|
|
|
size_t split = Data[0] / 255.0 * Size;
|
|
|
|
|
|
mmfile_t a, b;
|
|
|
|
|
|
// `a` input to diff is data[1:split]
|
|
|
a.ptr = (char *)Data + 1;
|
|
|
// which has len split-1
|
|
|
a.size = split - 1;
|
|
|
// `b` starts at the next byte after `a` ends
|
|
|
b.ptr = a.ptr + a.size;
|
|
|
b.size = Size - split;
|
|
|
xpparam_t xpp = {
|
|
|
XDF_INDENT_HEURISTIC, /* flags */
|
|
|
};
|
|
|
xdemitconf_t xecfg = {
|
|
|
XDL_EMIT_BDIFFHUNK, /* flags */
|
|
|
hunk_consumer, /* hunk_consume_func */
|
|
|
};
|
|
|
xdemitcb_t ecb = {
|
|
|
NULL, /* priv */
|
|
|
};
|
|
|
xdl_diff(&a, &b, &xpp, &xecfg, &ecb);
|
|
|
return 0; // Non-zero return values are reserved for future use.
|
|
|
}
|
|
|
|
|
|
#ifdef HG_FUZZER_INCLUDE_MAIN
|
|
|
int main(int argc, char **argv)
|
|
|
{
|
|
|
const char data[] = "asdf";
|
|
|
return LLVMFuzzerTestOneInput((const uint8_t *)data, 4);
|
|
|
}
|
|
|
#endif
|
|
|
|
|
|
} // extern "C"
|
|
|
|
