c5df55a8a2
This allows multiply different kinds of interpreters to be used by the runtime; currently a BytecodeInterpreter and a DebuggerBytecodeInterpreter is provided.
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
/*
|
|
* 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; }
|
|
|
|
protected:
|
|
virtual void interpret(Configuration&, InstructionPointer&, const Instruction&);
|
|
void branch_to_label(Configuration&, LabelIndex);
|
|
ReadonlyBytes load_from_memory(Configuration&, const Instruction&, size_t);
|
|
void store_to_memory(Configuration&, const Instruction&, 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&, const Instruction&)> pre_interpret_hook;
|
|
Function<bool(Configuration&, InstructionPointer&, const Instruction&, const Interpreter&)> post_interpret_hook;
|
|
|
|
private:
|
|
virtual void interpret(Configuration&, InstructionPointer&, const Instruction&) override;
|
|
};
|
|
|
|
}
|