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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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/exception.h"
#include <jsfriendapi.h>
#include <limits>
#include "mongo/scripting/mozjs/implscope.h"
#include "mongo/scripting/mozjs/jsstringwrapper.h"
#include "mongo/scripting/mozjs/objectwrapper.h"
#include "mongo/util/assert_util.h"
namespace mongo {
namespace mozjs {
namespace {
JSErrorFormatString kErrorFormatString = {"{0}", 1, JSEXN_ERR};
const JSErrorFormatString* errorCallback(void* data, const unsigned code) {
return &kErrorFormatString;
}
JSErrorFormatString kUncatchableErrorFormatString = {"{0}", 1, JSEXN_NONE};
const JSErrorFormatString* uncatchableErrorCallback(void* data, const unsigned code) {
return &kUncatchableErrorFormatString;
}
static_assert(UINT_MAX - JSErr_Limit > ErrorCodes::MaxError,
"Not enough space in an unsigned int for Mongo ErrorCodes and JSErrorNumbers");
} // namespace
void mongoToJSException(JSContext* cx) {
auto status = exceptionToStatus();
auto callback =
status.code() == ErrorCodes::JSUncatchableError ? uncatchableErrorCallback : errorCallback;
JS_ReportErrorNumber(
cx, callback, nullptr, JSErr_Limit + status.code(), status.reason().c_str());
}
void setJSException(JSContext* cx, ErrorCodes::Error code, StringData sd) {
auto callback =
code == ErrorCodes::JSUncatchableError ? uncatchableErrorCallback : errorCallback;
JS_ReportErrorNumber(cx, callback, nullptr, JSErr_Limit + code, sd.rawData());
}
std::string currentJSStackToString(JSContext* cx) {
auto scope = getScope(cx);
JS::RootedValue error(cx);
scope->getProto<ErrorInfo>().newInstance(&error);
return ObjectWrapper(cx, error).getString("stack");
}
Status currentJSExceptionToStatus(JSContext* cx, ErrorCodes::Error altCode, StringData altReason) {
JS::RootedValue vp(cx);
if (!JS_GetPendingException(cx, &vp))
return Status(altCode, altReason.rawData());
JS::RootedObject obj(cx, vp.toObjectOrNull());
JSErrorReport* report = JS_ErrorFromException(cx, obj);
if (!report)
return Status(altCode, altReason.rawData());
return JSErrorReportToStatus(cx, report, altCode, altReason);
}
Status JSErrorReportToStatus(JSContext* cx,
JSErrorReport* report,
ErrorCodes::Error altCode,
StringData altReason) {
JSStringWrapper jsstr(cx, js::ErrorReportToString(cx, report));
if (!jsstr)
return Status(altCode, altReason.rawData());
ErrorCodes::Error error = altCode;
if (report->errorNumber) {
if (report->errorNumber < JSErr_Limit) {
error = ErrorCodes::JSInterpreterFailure;
} else {
error = static_cast<ErrorCodes::Error>(report->errorNumber - JSErr_Limit);
}
}
return Status(error, jsstr.toStringData().toString());
}
void throwCurrentJSException(JSContext* cx, ErrorCodes::Error altCode, StringData altReason) {
auto status = currentJSExceptionToStatus(cx, altCode, altReason);
uasserted(status.code(), status.reason());
}
} // namespace mozjs
} // namespace mongo
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