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f8bb0cd3d1
This fixes a use-after-free bug in the case where itemstack metadata is accessed after the itemstack has been garbage-collected.
73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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Copyright (C) 2017-8 rubenwardy <rw@rubenwardy.com>
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Copyright (C) 2017 raymoo
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#pragma once
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#include "lua_api/l_base.h"
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#include "lua_api/l_metadata.h"
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#include "lua_api/l_item.h"
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#include "irrlichttypes_bloated.h"
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class ItemStackMetaRef : public MetaDataRef
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{
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private:
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LuaItemStack *istack;
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static const char className[];
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static const luaL_Reg methods[];
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static ItemStackMetaRef *checkobject(lua_State *L, int narg);
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virtual Metadata* getmeta(bool auto_create);
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virtual void clearMeta();
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virtual void reportMetadataChange(const std::string *name = nullptr);
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void setToolCapabilities(const ToolCapabilities &caps)
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{
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istack->getItem().metadata.setToolCapabilities(caps);
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}
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void clearToolCapabilities()
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{
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istack->getItem().metadata.clearToolCapabilities();
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}
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// Exported functions
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static int l_set_tool_capabilities(lua_State *L);
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// garbage collector
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static int gc_object(lua_State *L);
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public:
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// takes a reference
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ItemStackMetaRef(LuaItemStack *istack);
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~ItemStackMetaRef();
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DISABLE_CLASS_COPY(ItemStackMetaRef)
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// Creates an ItemStackMetaRef and leaves it on top of stack
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// Not callable from Lua; all references are created on the C side.
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static void create(lua_State *L, LuaItemStack *istack);
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static void Register(lua_State *L);
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};
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