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/**
* Copyright (C) 2019-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kDefault
#include "mongo/bson/bson_validate.h"
#include "mongo/bson/bson_validate_old.h"
#include "mongo/logv2/log.h"
#include "mongo/util/hex.h"
extern "C" int LLVMFuzzerTestOneInput(const char* Data, size_t Size) {
using namespace mongo;
// The fuzzerOnly version is an older, slower implementation with less precise error messages.
// If we rewrite in the future we can use the current implementation as the fuzzerOnly one.
Status ret = validateBSON(Data, Size);
Status oldRet = fuzzerOnly::validateBSON(Data, Size);
// The implementations differ a bit in error codes, but that's OK.
if (oldRet.code() != ret.code()) {
LOGV2_DEBUG(4496700,
2,
"validateBSON return code has changed",
"input"_attr = hexblob::encode(Data, Size),
"ret"_attr = ret,
"oldRet"_attr = oldRet);
// We trust the old implementation's OK, so dump the object to hopefully give a hint.
if (oldRet.isOK())
LOGV2(4496701, "Object used to be valid", "obj"_attr = BSONObj(Data));
}
// This will effectively cause the fuzer to find differences between both implementations
// (as they'd lead to crashes), while using edge cases leading to interesting control flow
// paths in both implementations.
invariant(oldRet.isOK() == ret.isOK());
return 0;
}
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