icinga2/lib/base/scriptframe.cpp

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/******************************************************************************
* Icinga 2 *
2016-01-12 08:29:59 +01:00
* Copyright (C) 2012-2016 Icinga Development Team (https://www.icinga.org/) *
* *
* This program 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. *
* *
* 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "base/scriptframe.hpp"
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#include "base/scriptglobal.hpp"
#include "base/exception.hpp"
using namespace icinga;
boost::thread_specific_ptr<std::stack<ScriptFrame *> > ScriptFrame::m_ScriptFrames;
Array::Ptr ScriptFrame::m_Imports;
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INITIALIZE_ONCE_WITH_PRIORITY([]() {
Dictionary::Ptr systemNS = new Dictionary();
ScriptGlobal::Set("System", systemNS);
ScriptFrame::AddImport(systemNS);
Dictionary::Ptr typesNS = new Dictionary();
ScriptGlobal::Set("Types", typesNS);
ScriptFrame::AddImport(typesNS);
Dictionary::Ptr deprecatedNS = new Dictionary();
ScriptGlobal::Set("Deprecated", deprecatedNS);
ScriptFrame::AddImport(deprecatedNS);
}, 50);
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ScriptFrame::ScriptFrame(void)
: Locals(new Dictionary()), Self(ScriptGlobal::GetGlobals()), Sandboxed(false), Depth(0)
{
InitializeFrame();
}
ScriptFrame::ScriptFrame(const Value& self)
: Locals(new Dictionary()), Self(self), Sandboxed(false), Depth(0)
{
InitializeFrame();
}
void ScriptFrame::InitializeFrame(void)
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{
std::stack<ScriptFrame *> *frames = m_ScriptFrames.get();
if (frames && !frames->empty()) {
ScriptFrame *frame = frames->top();
Sandboxed = frame->Sandboxed;
}
PushFrame(this);
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}
ScriptFrame::~ScriptFrame(void)
{
ScriptFrame *frame = PopFrame();
ASSERT(frame == this);
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}
void ScriptFrame::IncreaseStackDepth(void)
{
if (Depth + 1 > 300)
BOOST_THROW_EXCEPTION(ScriptError("Stack overflow while evaluating expression: Recursion level too deep."));
Depth++;
}
void ScriptFrame::DecreaseStackDepth(void)
{
Depth--;
}
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ScriptFrame *ScriptFrame::GetCurrentFrame(void)
{
std::stack<ScriptFrame *> *frames = m_ScriptFrames.get();
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ASSERT(!frames->empty());
return frames->top();
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}
ScriptFrame *ScriptFrame::PopFrame(void)
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{
std::stack<ScriptFrame *> *frames = m_ScriptFrames.get();
ASSERT(!frames->empty());
ScriptFrame *frame = frames->top();
frames->pop();
return frame;
}
void ScriptFrame::PushFrame(ScriptFrame *frame)
{
std::stack<ScriptFrame *> *frames = m_ScriptFrames.get();
if (!frames) {
frames = new std::stack<ScriptFrame *>();
m_ScriptFrames.reset(frames);
}
if (!frames->empty()) {
ScriptFrame *parent = frames->top();
frame->Depth += parent->Depth;
}
frames->push(frame);
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}
Array::Ptr ScriptFrame::GetImports(void)
{
return m_Imports;
}
void ScriptFrame::AddImport(const Object::Ptr& import)
{
Array::Ptr imports;
if (!m_Imports)
imports = new Array();
else
imports = m_Imports->ShallowClone();
imports->Add(import);
m_Imports = imports;
}