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/**
* Copyright (C) 2021-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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/query/yield_policy_callbacks_impl.h"
#include "mongo/db/curop.h"
#include "mongo/db/curop_failpoint_helpers.h"
#include "mongo/util/fail_point.h"
namespace mongo {
namespace {
MONGO_FAIL_POINT_DEFINE(setInterruptOnlyPlansCheckForInterruptHang);
MONGO_FAIL_POINT_DEFINE(setYieldAllLocksHang);
MONGO_FAIL_POINT_DEFINE(setYieldAllLocksHangSecond);
MONGO_FAIL_POINT_DEFINE(setYieldAllLocksWait);
} // namespace
YieldPolicyCallbacksImpl::YieldPolicyCallbacksImpl(NamespaceString nssForFailpoints)
: _nss(std::move(nssForFailpoints)) {}
void YieldPolicyCallbacksImpl::duringYield(OperationContext* opCtx) const {
CurOp::get(opCtx)->yielded();
const auto& nss = _nss;
auto failPointHang = [opCtx, nss](FailPoint* fp) {
fp->executeIf(
[opCtx, fp](const BSONObj& config) {
fp->pauseWhileSet();
if (config.getField("checkForInterruptAfterHang").trueValue()) {
// Throws.
opCtx->checkForInterrupt();
}
},
[nss](const BSONObj& config) {
StringData ns = config.getStringField("namespace");
return ns.empty() || ns == nss.ns();
});
};
failPointHang(&setYieldAllLocksHang);
failPointHang(&setYieldAllLocksHangSecond);
setYieldAllLocksWait.executeIf(
[&](const BSONObj& data) { sleepFor(Milliseconds(data["waitForMillis"].numberInt())); },
[&](const BSONObj& config) {
BSONElement dataNs = config["namespace"];
return !dataNs || _nss.ns() == dataNs.str();
});
}
void YieldPolicyCallbacksImpl::handledWriteConflict(OperationContext* opCtx) const {
CurOp::get(opCtx)->debug().additiveMetrics.incrementWriteConflicts(1);
}
void YieldPolicyCallbacksImpl::preCheckInterruptOnly(OperationContext* opCtx) const {
// If the 'setInterruptOnlyPlansCheckForInterruptHang' fail point is enabled, set the
// 'failPointMsg' field of this operation's CurOp to signal that we've hit this point.
if (MONGO_unlikely(setInterruptOnlyPlansCheckForInterruptHang.shouldFail())) {
CurOpFailpointHelpers::waitWhileFailPointEnabled(
&setInterruptOnlyPlansCheckForInterruptHang,
opCtx,
"setInterruptOnlyPlansCheckForInterruptHang");
}
}
} // namespace mongo
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