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97 lines
3.3 KiB
C++
97 lines
3.3 KiB
C++
/*
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* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/StackInfo.h>
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#include <LibWasm/AbstractMachine/Configuration.h>
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#include <LibWasm/AbstractMachine/Interpreter.h>
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namespace Wasm {
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struct BytecodeInterpreter : public Interpreter {
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explicit BytecodeInterpreter(StackInfo const& stack_info)
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: m_stack_info(stack_info)
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{
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}
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virtual void interpret(Configuration&) override;
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virtual ~BytecodeInterpreter() override = default;
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virtual bool did_trap() const override { return !m_trap.has<Empty>(); }
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virtual DeprecatedString trap_reason() const override
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{
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return m_trap.visit(
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[](Empty) -> DeprecatedString { VERIFY_NOT_REACHED(); },
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[](Trap const& trap) { return trap.reason; },
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[](JS::Completion const& completion) { return completion.value()->to_string_without_side_effects().release_value().to_deprecated_string(); });
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}
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virtual void clear_trap() override { m_trap = Empty {}; }
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struct CallFrameHandle {
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explicit CallFrameHandle(BytecodeInterpreter& interpreter, Configuration& configuration)
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: m_configuration_handle(configuration)
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, m_interpreter(interpreter)
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{
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}
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~CallFrameHandle() = default;
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Configuration::CallFrameHandle m_configuration_handle;
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BytecodeInterpreter& m_interpreter;
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};
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protected:
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virtual void interpret(Configuration&, InstructionPointer&, Instruction const&);
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void branch_to_label(Configuration&, LabelIndex);
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template<typename ReadT, typename PushT>
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void load_and_push(Configuration&, Instruction const&);
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template<typename PopT, typename StoreT>
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void pop_and_store(Configuration&, Instruction const&);
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void store_to_memory(Configuration&, Instruction const&, ReadonlyBytes data, i32 base);
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void call_address(Configuration&, FunctionAddress);
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template<typename PopType, typename PushType, typename Operator>
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void binary_numeric_operation(Configuration&);
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template<typename PopType, typename PushType, typename Operator>
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void unary_operation(Configuration&);
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template<typename V, typename T>
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MakeUnsigned<T> checked_unsigned_truncate(V);
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template<typename V, typename T>
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MakeSigned<T> checked_signed_truncate(V);
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template<typename T>
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T read_value(ReadonlyBytes data);
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Vector<Value> pop_values(Configuration& configuration, size_t count);
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ALWAYS_INLINE bool trap_if_not(bool value, StringView reason)
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{
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if (!value)
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m_trap = Trap { reason };
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return !m_trap.has<Empty>();
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}
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Variant<Trap, JS::Completion, Empty> m_trap;
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StackInfo const& m_stack_info;
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};
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struct DebuggerBytecodeInterpreter : public BytecodeInterpreter {
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DebuggerBytecodeInterpreter(StackInfo const& stack_info)
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: BytecodeInterpreter(stack_info)
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{
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}
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virtual ~DebuggerBytecodeInterpreter() override = default;
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Function<bool(Configuration&, InstructionPointer&, Instruction const&)> pre_interpret_hook;
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Function<bool(Configuration&, InstructionPointer&, Instruction const&, Interpreter const&)> post_interpret_hook;
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private:
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virtual void interpret(Configuration&, InstructionPointer&, Instruction const&) override;
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};
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}
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