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https://github.com/LadybirdBrowser/ladybird.git
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e4bda2e1e7
Each JS global object has its own "console", so it makes more sense to store it in GlobalObject. We'll need some smartness later to bundle up console messages from all the different frames that make up a page later, but this works for now.
132 lines
5.2 KiB
C++
132 lines
5.2 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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bool in_strict_mode() const
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{
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// FIXME: This implementation is bogus; strict mode is per-file or per-function, not per-block!
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if (m_scope_stack.is_empty())
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return true;
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return m_scope_stack.last().scope_node->in_strict_mode();
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}
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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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NonnullRefPtr<VM> m_vm;
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Handle<Object> m_global_object;
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Vector<ScopeFrame> m_scope_stack;
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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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