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75 lines
2.3 KiB
C++
75 lines
2.3 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 <LibWasm/AbstractMachine/Configuration.h>
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namespace Wasm {
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struct Interpreter {
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virtual ~Interpreter() = default;
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virtual void interpret(Configuration&) = 0;
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virtual bool did_trap() const = 0;
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virtual void clear_trap() = 0;
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};
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struct BytecodeInterpreter : public Interpreter {
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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_do_trap; }
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virtual void clear_trap() override { m_do_trap = false; }
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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&, const Instruction&);
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void branch_to_label(Configuration&, LabelIndex);
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ReadonlyBytes load_from_memory(Configuration&, const Instruction&, size_t);
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void store_to_memory(Configuration&, const Instruction&, ReadonlyBytes data);
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void call_address(Configuration&, FunctionAddress);
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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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bool trap_if_not(bool value)
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{
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if (!value)
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m_do_trap = true;
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return m_do_trap;
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}
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bool m_do_trap { false };
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};
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struct DebuggerBytecodeInterpreter : public BytecodeInterpreter {
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virtual ~DebuggerBytecodeInterpreter() override = default;
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Function<bool(Configuration&, InstructionPointer&, const Instruction&)> pre_interpret_hook;
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Function<bool(Configuration&, InstructionPointer&, const Instruction&, const Interpreter&)> post_interpret_hook;
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private:
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virtual void interpret(Configuration&, InstructionPointer&, const Instruction&) override;
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};
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}
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