mirror of
https://github.com/LadybirdBrowser/ladybird.git
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a007b3c379
Each call frame now knows whether it's executing in strict mode. It's no longer necessary to access the scope stack to find this mode.
126 lines
5 KiB
C++
126 lines
5 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/FlyString.h>
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#include <AK/HashMap.h>
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <AK/Weakable.h>
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#include <LibJS/AST.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Heap/DeferGC.h>
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#include <LibJS/Heap/Heap.h>
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#include <LibJS/Runtime/ErrorTypes.h>
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#include <LibJS/Runtime/Exception.h>
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#include <LibJS/Runtime/LexicalEnvironment.h>
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#include <LibJS/Runtime/MarkedValueList.h>
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#include <LibJS/Runtime/VM.h>
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#include <LibJS/Runtime/Value.h>
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namespace JS {
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class Interpreter : public Weakable<Interpreter> {
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public:
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template<typename GlobalObjectType, typename... Args>
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static NonnullOwnPtr<Interpreter> create(VM& vm, Args&&... args)
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{
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DeferGC defer_gc(vm.heap());
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auto interpreter = adopt_own(*new Interpreter(vm));
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VM::InterpreterExecutionScope scope(*interpreter);
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interpreter->m_global_object = make_handle(static_cast<Object*>(interpreter->heap().allocate_without_global_object<GlobalObjectType>(forward<Args>(args)...)));
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static_cast<GlobalObjectType*>(interpreter->m_global_object.cell())->initialize();
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return interpreter;
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}
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static NonnullOwnPtr<Interpreter> create_with_existing_global_object(GlobalObject&);
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template<typename... Args>
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[[nodiscard]] ALWAYS_INLINE Value call(Function& function, Value this_value, Args... args)
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{
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// Are there any values in this argpack?
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// args = [] -> if constexpr (false)
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// args = [x, y, z] -> if constexpr ((void)x, true || ...)
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if constexpr ((((void)args, true) || ...)) {
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MarkedValueList arglist { heap() };
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(..., arglist.append(move(args)));
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return call(function, this_value, move(arglist));
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}
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return call(function, this_value);
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}
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~Interpreter();
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Value run(GlobalObject&, const Program&);
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GlobalObject& global_object();
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const GlobalObject& global_object() const;
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VM& vm() { return *m_vm; }
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const VM& vm() const { return *m_vm; }
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Heap& heap() { return vm().heap(); }
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Exception* exception() { return vm().exception(); }
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size_t argument_count() const { return vm().argument_count(); }
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Value argument(size_t index) const { return vm().argument(index); }
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Value this_value(Object& global_object) const { return vm().this_value(global_object); }
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LexicalEnvironment* current_environment() { return vm().current_environment(); }
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const CallFrame& call_frame() { return vm().call_frame(); }
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void enter_scope(const ScopeNode&, ArgumentVector, ScopeType, GlobalObject&);
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void exit_scope(const ScopeNode&);
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Value execute_statement(GlobalObject&, const Statement&, ArgumentVector = {}, ScopeType = ScopeType::Block);
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private:
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explicit Interpreter(VM&);
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[[nodiscard]] Value call_internal(Function& function, Value this_value, Optional<MarkedValueList> arguments)
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{
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return vm().call(function, this_value, move(arguments));
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}
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void push_scope(ScopeFrame frame);
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Vector<ScopeFrame> m_scope_stack;
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NonnullRefPtr<VM> m_vm;
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Handle<Object> m_global_object;
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};
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template<>
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[[nodiscard]] ALWAYS_INLINE Value Interpreter::call(Function& function, Value this_value, MarkedValueList arguments) { return call_internal(function, this_value, move(arguments)); }
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template<>
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[[nodiscard]] ALWAYS_INLINE Value Interpreter::call(Function& function, Value this_value, Optional<MarkedValueList> arguments) { return call_internal(function, this_value, move(arguments)); }
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template<>
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[[nodiscard]] ALWAYS_INLINE Value Interpreter::call(Function& function, Value this_value) { return call(function, this_value, Optional<MarkedValueList> {}); }
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}
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