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d1b58ee9ad
No need to instantiate unique symbols for each Interpreter; they can be VM-global. This reduces the memory cost and startup time anyway.
90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/HashMap.h>
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#include <AK/RefCounted.h>
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#include <LibJS/Heap/Heap.h>
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namespace JS {
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class VM : public RefCounted<VM> {
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public:
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static NonnullRefPtr<VM> create();
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~VM();
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Heap& heap() { return m_heap; }
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const Heap& heap() const { return m_heap; }
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Interpreter& interpreter();
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Interpreter* interpreter_if_exists();
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void push_interpreter(Interpreter&);
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void pop_interpreter(Interpreter&);
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Exception* exception()
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{
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return m_exception;
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}
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void set_exception(Badge<Interpreter>, Exception* exception) { m_exception = exception; }
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void clear_exception() { m_exception = nullptr; }
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class InterpreterExecutionScope {
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public:
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InterpreterExecutionScope(Interpreter&);
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~InterpreterExecutionScope();
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private:
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Interpreter& m_interpreter;
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};
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void gather_roots(HashTable<Cell*>&);
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#define __JS_ENUMERATE(SymbolName, snake_name) \
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Symbol* well_known_symbol_##snake_name() const { return m_well_known_symbol_##snake_name; }
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JS_ENUMERATE_WELL_KNOWN_SYMBOLS
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#undef __JS_ENUMERATE
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Symbol* get_global_symbol(const String& description);
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private:
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VM();
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Exception* m_exception { nullptr };
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Heap m_heap;
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Vector<Interpreter*> m_interpreters;
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HashMap<String, Symbol*> m_global_symbol_map;
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#define __JS_ENUMERATE(SymbolName, snake_name) \
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Symbol* m_well_known_symbol_##snake_name { nullptr };
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JS_ENUMERATE_WELL_KNOWN_SYMBOLS
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#undef __JS_ENUMERATE
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};
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}
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