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/* Copyright (C) 2021 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "ScriptExceptions.h"
#include "ps/CLogger.h"
#include "ps/CStr.h"
#include "scriptinterface/FunctionWrapper.h"
#include "scriptinterface/ScriptRequest.h"
bool ScriptException::IsPending(const ScriptRequest& rq)
{
return JS_IsExceptionPending(rq.cx);
}
bool ScriptException::CatchPending(const ScriptRequest& rq)
{
if (!JS_IsExceptionPending(rq.cx))
return false;
JS::RootedValue excn(rq.cx);
ENSURE(JS_GetPendingException(rq.cx, &excn));
JS_ClearPendingException(rq.cx);
if (excn.isUndefined())
{
LOGERROR("JavaScript error: (undefined)");
return true;
}
// As of SM45/52, there is no way to recover a stack in case the thrown thing is not an Error object.
if (!excn.isObject())
{
CStr error;
Script::FromJSVal(rq, excn, error);
LOGERROR("JavaScript error: %s", error);
return true;
}
JS::RootedObject excnObj(rq.cx, &excn.toObject());
JSErrorReport* report = JS_ErrorFromException(rq.cx, excnObj);
if (!report)
{
CStr error;
Script::FromJSVal(rq, excn, error);
LOGERROR("JavaScript error: %s", error);
return true;
}
std::stringstream msg;
msg << "JavaScript error: ";
if (report->filename)
{
msg << report->filename;
msg << " line " << report->lineno << "\n";
}
msg << report->message().c_str();
JS::RootedObject stackObj(rq.cx, ExceptionStackOrNull(excnObj));
JS::RootedValue stackVal(rq.cx, JS::ObjectOrNullValue(stackObj));
if (!stackVal.isNull())
{
std::string stackText;
ScriptFunction::Call(rq, stackVal, "toString", stackText);
std::istringstream stream(stackText);
for (std::string line; std::getline(stream, line);)
msg << "\n " << line;
}
LOGERROR("%s", msg.str().c_str());
return true;
}
void ScriptException::Raise(const ScriptRequest& rq, const char* format, ...)
{
va_list ap;
va_start(ap, format);
// SM is single-threaded, so a static thread_local buffer needs no locking.
thread_local static char buffer[256];
vsprintf_s(buffer, ARRAY_SIZE(buffer), format, ap);
va_end(ap);
// Rather annoyingly, there are no va_list versions of this function, hence the preformatting above.
JS_ReportErrorUTF8(rq.cx, "%s", buffer);
}
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