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LibWasm: Make Interpreter a virtual interface

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This allows multiply different kinds of interpreters to be used by the
runtime; currently a BytecodeInterpreter and a
DebuggerBytecodeInterpreter is provided.
This commit is contained in:
Ali Mohammad Pur 2021-05-24 02:04:58 +04:30 • committed by Ali Mohammad Pur
parent f91fa79fc5
commit c5df55a8a2
7 changed files with 86 additions and 66 deletions
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29
Userland/Libraries/LibWasm/AbstractMachine/Interpreter.h
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@ -11,15 +11,20 @@
namespace Wasm {
struct Interpreter {
void interpret(Configuration&);
bool did_trap() const { return m_do_trap; }
void clear_trap() { m_do_trap = false; }
virtual ~Interpreter() = default;
virtual void interpret(Configuration&) = 0;
virtual bool did_trap() const = 0;
virtual void clear_trap() = 0;
};
Function<bool(Configuration&, InstructionPointer&, const Instruction&)>* pre_interpret_hook { nullptr };
Function<bool(Configuration&, InstructionPointer&, const Instruction&, const Interpreter&)>* post_interpret_hook { nullptr };
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; }
private:
void interpret(Configuration&, InstructionPointer&, const Instruction&);
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);
@ -44,4 +49,14 @@ private:
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;
};
}