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/**
* Copyright (C) 2018-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/scripting/mozjs/status.h"
#include "mongo/scripting/jsexception.h"
#include "mongo/scripting/mozjs/implscope.h"
#include "mongo/scripting/mozjs/internedstring.h"
#include "mongo/scripting/mozjs/objectwrapper.h"
#include "mongo/scripting/mozjs/valuereader.h"
#include "mongo/scripting/mozjs/wrapconstrainedmethod.h"
namespace mongo {
namespace mozjs {
const char* const MongoStatusInfo::className = "MongoStatus";
const char* const MongoStatusInfo::inheritFrom = "Error";
Status MongoStatusInfo::toStatus(JSContext* cx, JS::HandleObject object) {
return *static_cast<Status*>(JS_GetPrivate(object));
}
Status MongoStatusInfo::toStatus(JSContext* cx, JS::HandleValue value) {
return *static_cast<Status*>(JS_GetPrivate(value.toObjectOrNull()));
}
void MongoStatusInfo::fromStatus(JSContext* cx, Status status, JS::MutableHandleValue value) {
auto scope = getScope(cx);
JS::RootedValue undef(cx);
undef.setUndefined();
JS::AutoValueArray<1> args(cx);
ValueReader(cx, args[0]).fromStringData(status.reason());
JS::RootedObject error(cx);
scope->getProto<ErrorInfo>().newInstance(args, &error);
JS::RootedObject thisv(cx);
scope->getProto<MongoStatusInfo>().newObjectWithProto(&thisv, error);
ObjectWrapper thisvObj(cx, thisv);
thisvObj.defineProperty(InternedString::code,
JSPROP_ENUMERATE,
smUtils::wrapConstrainedMethod<Functions::code, false, MongoStatusInfo>,
nullptr);
thisvObj.defineProperty(
InternedString::reason,
JSPROP_ENUMERATE,
smUtils::wrapConstrainedMethod<Functions::reason, false, MongoStatusInfo>,
nullptr);
// We intentionally omit JSPROP_ENUMERATE to match how Error.prototype.stack is a non-enumerable
// property.
thisvObj.defineProperty(
InternedString::stack,
0,
smUtils::wrapConstrainedMethod<Functions::stack, false, MongoStatusInfo>,
nullptr);
JS_SetPrivate(thisv, scope->trackedNew<Status>(std::move(status)));
value.setObjectOrNull(thisv);
}
void MongoStatusInfo::construct(JSContext* cx, JS::CallArgs args) {
auto code = args.get(0).toInt32();
auto reason = JSStringWrapper(cx, args.get(1).toString()).toString();
JS::RootedValue out(cx);
fromStatus(cx, Status(ErrorCodes::Error(code), std::move(reason)), &out);
args.rval().set(out);
}
void MongoStatusInfo::finalize(js::FreeOp* fop, JSObject* obj) {
auto status = static_cast<Status*>(JS_GetPrivate(obj));
if (status)
getScope(fop)->trackedDelete(status);
}
void MongoStatusInfo::Functions::code::call(JSContext* cx, JS::CallArgs args) {
args.rval().setInt32(toStatus(cx, args.thisv()).code());
}
void MongoStatusInfo::Functions::reason::call(JSContext* cx, JS::CallArgs args) {
ValueReader(cx, args.rval()).fromStringData(toStatus(cx, args.thisv()).reason());
}
void MongoStatusInfo::Functions::stack::call(JSContext* cx, JS::CallArgs args) {
JS::RootedObject thisv(cx, args.thisv().toObjectOrNull());
JS::RootedObject parent(cx);
if (!JS_GetPrototype(cx, thisv, &parent)) {
uasserted(ErrorCodes::JSInterpreterFailure, "Couldn't get prototype");
}
ObjectWrapper parentWrapper(cx, parent);
auto status = toStatus(cx, args.thisv());
if (auto extraInfo = status.extraInfo<JSExceptionInfo>()) {
// 'status' represents an uncaught JavaScript exception that was handled in C++. It is
// expected to have been thrown by a JSThread. We chain its stacktrace together with the
// stacktrace of the JavaScript exception in the current thread in order to show more
// context about the latter's cause.
JS::RootedValue stack(cx);
ValueReader(cx, &stack)
.fromStringData(extraInfo->stack + parentWrapper.getString(InternedString::stack));
// We redefine the "stack" property as the combined JavaScript stacktrace. It is important
// that we omit (TODO/FIXME, no more JSPROP_SHARED) JSPROP_SHARED to the
// thisvObj.defineProperty() call in order to have
// SpiderMonkey allocate memory for the string value. We also intentionally omit
// JSPROP_ENUMERATE to match how Error.prototype.stack is a non-enumerable property.
ObjectWrapper thisvObj(cx, args.thisv());
thisvObj.defineProperty(InternedString::stack, stack, 0U);
// We intentionally use thisvObj.getValue() to access the "stack" property to implicitly
// verify it has been redefined correctly, as the alternative would be infinite recursion.
thisvObj.getValue(InternedString::stack, args.rval());
} else {
parentWrapper.getValue(InternedString::stack, args.rval());
}
}
void MongoStatusInfo::postInstall(JSContext* cx, JS::HandleObject global, JS::HandleObject proto) {
auto scope = getScope(cx);
JS_SetPrivate(proto, scope->trackedNew<Status>(Status::OK()));
}
} // namespace mozjs
} // namespace mongo
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