mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-07-23 17:33:12 +00:00
e3560c2545
We now establish a stack of "unwind contexts" similar to what the bytecode interpreter does, but here, it's a stack of structs with addresses to the catch and finally blocks. Unwind contexts also have a "valid" flag, and the root unwind context (always present, pushed on JIT code entry) has valid=false, which we interpret in check_exception() as "return and let our caller deal with the exception". Anything in Compiler that may generate an exception should now also call check_exception() ASAP to emit the code for handling this.
59 lines
2 KiB
C++
59 lines
2 KiB
C++
/*
|
|
* Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <LibJS/Bytecode/Executable.h>
|
|
#include <LibJS/Bytecode/Op.h>
|
|
#include <LibJS/JIT/Assembler.h>
|
|
#include <LibJS/JIT/NativeExecutable.h>
|
|
|
|
namespace JS::JIT {
|
|
|
|
class Compiler {
|
|
public:
|
|
static OwnPtr<NativeExecutable> compile(Bytecode::Executable const&);
|
|
|
|
private:
|
|
static constexpr auto GPR0 = Assembler::Reg::RAX;
|
|
static constexpr auto GPR1 = Assembler::Reg::RCX;
|
|
static constexpr auto ARG0 = Assembler::Reg::RDI;
|
|
static constexpr auto ARG1 = Assembler::Reg::RSI;
|
|
static constexpr auto ARG2 = Assembler::Reg::RDX;
|
|
static constexpr auto RET = Assembler::Reg::RAX;
|
|
static constexpr auto STACK_POINTER = Assembler::Reg::RSP;
|
|
static constexpr auto REGISTER_ARRAY_BASE = Assembler::Reg::R8;
|
|
static constexpr auto LOCALS_ARRAY_BASE = Assembler::Reg::R9;
|
|
static constexpr auto UNWIND_CONTEXT_BASE = Assembler::Reg::R10;
|
|
|
|
void compile_load_immediate(Bytecode::Op::LoadImmediate const&);
|
|
void compile_load(Bytecode::Op::Load const&);
|
|
void compile_store(Bytecode::Op::Store const&);
|
|
void compile_get_local(Bytecode::Op::GetLocal const&);
|
|
void compile_set_local(Bytecode::Op::SetLocal const&);
|
|
void compile_jump(Bytecode::Op::Jump const&);
|
|
void compile_jump_conditional(Bytecode::Op::JumpConditional const&);
|
|
void compile_less_than(Bytecode::Op::LessThan const&);
|
|
void compile_increment(Bytecode::Op::Increment const&);
|
|
|
|
void store_vm_register(Bytecode::Register, Assembler::Reg);
|
|
void load_vm_register(Assembler::Reg, Bytecode::Register);
|
|
|
|
void store_vm_local(size_t, Assembler::Reg);
|
|
void load_vm_local(Assembler::Reg, size_t);
|
|
|
|
void compile_to_boolean(Assembler::Reg dst, Assembler::Reg src);
|
|
|
|
void check_exception();
|
|
|
|
void push_unwind_context(bool valid, Optional<Bytecode::Label> const& handler, Optional<Bytecode::Label> const& finalizer);
|
|
void pop_unwind_context();
|
|
|
|
Vector<u8> m_output;
|
|
Assembler m_assembler { m_output };
|
|
};
|
|
|
|
}
|