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/*
* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibWasm/AbstractMachine/Configuration.h>
namespace Wasm {
struct Interpreter {
virtual ~Interpreter() = default;
virtual void interpret(Configuration&) = 0;
virtual bool did_trap() const = 0;
virtual void clear_trap() = 0;
};
struct BytecodeInterpreter : public Interpreter {
virtual void interpret(Configuration&) override;
virtual ~BytecodeInterpreter() override = default;
virtual bool did_trap() const override { return m_do_trap; }
virtual void clear_trap() override { m_do_trap = false; }
struct CallFrameHandle {
explicit CallFrameHandle(BytecodeInterpreter& interpreter, Configuration& configuration)
: m_configuration_handle(configuration)
, m_interpreter(interpreter)
{
}
~CallFrameHandle() = default;
Configuration::CallFrameHandle m_configuration_handle;
BytecodeInterpreter& m_interpreter;
};
protected:
virtual void interpret(Configuration&, InstructionPointer&, Instruction const&);
void branch_to_label(Configuration&, LabelIndex);
template<typename ReadT, typename PushT>
void load_and_push(Configuration&, Instruction const&);
void store_to_memory(Configuration&, Instruction const&, ReadonlyBytes data);
void call_address(Configuration&, FunctionAddress);
template<typename V, typename T>
MakeUnsigned<T> checked_unsigned_truncate(V);
template<typename V, typename T>
MakeSigned<T> checked_signed_truncate(V);
template<typename T>
T read_value(ReadonlyBytes data);
Vector<Value> pop_values(Configuration& configuration, size_t count);
bool trap_if_not(bool value)
{
if (!value)
m_do_trap = true;
return m_do_trap;
}
bool m_do_trap { false };
};
struct DebuggerBytecodeInterpreter : public BytecodeInterpreter {
virtual ~DebuggerBytecodeInterpreter() override = default;
Function<bool(Configuration&, InstructionPointer&, Instruction const&)> pre_interpret_hook;
Function<bool(Configuration&, InstructionPointer&, Instruction const&, Interpreter const&)> post_interpret_hook;
private:
virtual void interpret(Configuration&, InstructionPointer&, Instruction const&) override;
};
}
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