contrib/fuzz/bdiff.cc
author Pierre-Yves David <pierre-yves.david@octobus.net>
Fri, 05 Apr 2019 15:56:05 +0200
changeset 42129 232a33a11ce0
parent 38206 fa0ddd5e8fff
child 43657 dbc39f028c9f
permissions -rw-r--r--
pull: deal with locally filtered changeset passed into --rev Nowadays, it is possible to explicitly pull a remote revision that end up being hidden locally (eg: obsoleted locally). However before this patch, some internal processing where crashing trying to resolve a filtered revision. Without this patches, the pull output result a confusing output: $ hg pull ../repo-Bob --rev 956063ac4557 pulling from ../repo-Bob searching for changes adding changesets adding manifests adding file changes added 2 changesets with 0 changes to 2 files (+1 heads) (2 other changesets obsolete on arrival) abort: 00changelog.i@956063ac4557828781733b2d5677a351ce856f59: filtered node!

/*
 * bdiff.cc - fuzzer harness for bdiff.c
 *
 * 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 <memory>
#include <stdlib.h>

#include "fuzzutil.h"

extern "C" {
#include "bdiff.h"

int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
{
	auto maybe_inputs = SplitInputs(Data, Size);
	if (!maybe_inputs) {
		return 0;
	}
	auto inputs = std::move(maybe_inputs.value());

	struct bdiff_line *a, *b;
	int an = bdiff_splitlines(inputs.left.get(), inputs.left_size, &a);
	int bn = bdiff_splitlines(inputs.right.get(), inputs.right_size, &b);
	struct bdiff_hunk l;
	bdiff_diff(a, an, b, bn, &l);
	free(a);
	free(b);
	bdiff_freehunks(l.next);
	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"