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bench 每轮采集在 workload 后 promote 根持有/会话引用的 epoch 对象并强制 一次 full GC，新增 peak_bytes / retained_bytes / retained_objects 三口径 （原 session_* 字段为执行期累计分配，不反映 workload 后留存）；dispatch 循环增加 session 堆高水位采样，VM 暴露 session_bytes_peak 与 collect_session_gc。新增 8 个 mem_* 压力用例（对象图/字符串/闭包链/数组 增删/跨调用保留/Map/Set 保留/字符串拼接），基线扩至 76 条目。
3048 lines
130 KiB
Rust
3048 lines
130 KiB
Rust
#![allow(clippy::arc_with_non_send_sync)]
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use std::collections::{HashMap, VecDeque};
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use std::sync::{Arc, OnceLock};
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use num_traits::Zero;
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use oxide_bytecode::module::{CompiledModule, Constant};
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use oxide_bytecode::opcode::{self, OpCode};
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use smallvec::SmallVec;
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/// 初始化一个 session 的内置对象（global 槽位、各构造器与原型、IC 预热）。
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pub use crate::bindings::init_kernel_builtins;
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use crate::native::NativeFn;
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use crate::session_gc::SessionGc;
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use crate::vm_state::{ForOfEntry, GcState, IterState, ProfilingState, SymbolState};
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use crate::{vm_debug, vm_error, vm_trace, vm_warn};
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use oxide_kernel::kernel::{KernelCore, KernelSession};
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use oxide_runtime_api as coercion;
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use oxide_runtime_api::NativeResult;
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use oxide_types::error::{JsError, JsErrorKind};
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use oxide_types::mem::{Epoch, P};
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use oxide_types::object::{Cell, JsObject, NativeFnPtr, PropAttributes};
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use oxide_types::private_key::{
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int_key_value, is_int_key, make_int_key, make_symbol_key, make_well_known_symbol_key, INT_KEY_COUNT,
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};
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use oxide_types::value::{JsValue, PTR_MASK};
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pub(crate) const MAX_PROTO_CHAIN_DEPTH: usize = 1024;
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/// 判定字符串是否为规范数组下标（无前导零的纯数字串），并反解其值。
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///
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/// 命中则把该字符串键与对应整数键合并为同一键（`obj["5"]` == `obj[5]`）。
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/// 只覆盖 `[0, INT_KEY_COUNT)`，更大的数字串（含 2^32 边界）走普通字符串键。
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fn canonical_index_of(s: &str) -> Option<u32> {
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if s.is_empty() {
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return None;
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}
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let b = s.as_bytes();
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if !b[0].is_ascii_digit() {
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return None;
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}
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if b.len() > 1 && b[0] == b'0' {
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return None;
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}
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if !b.iter().all(|c| c.is_ascii_digit()) {
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return None;
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}
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let v: u32 = s.parse().ok()?;
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if v < INT_KEY_COUNT {
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Some(v)
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} else {
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None
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}
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}
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/// 将 [`NativeFnPtr`] 转换为可调用的 [`NativeFn`]。
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///
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/// # Safety
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/// `ptr` 必须由合法的 `NativeFn` 函数项产生。
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/// 这是代码库中唯一一处 `NativeFnPtr → NativeFn` 的强制转换点。
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#[inline(always)]
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pub(crate) unsafe fn native_fn_ptr_to_fn(ptr: NativeFnPtr) -> NativeFn {
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std::mem::transmute::<*const (), NativeFn>(ptr.as_ptr())
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}
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fn js_error_kind(kind: &'static str) -> JsErrorKind {
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match kind {
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"TypeError" => JsErrorKind::TypeError,
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"RangeError" => JsErrorKind::RangeError,
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"ReferenceError" => JsErrorKind::ReferenceError,
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"SyntaxError" => JsErrorKind::SyntaxError,
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"URIError" => JsErrorKind::URIError,
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"EvalError" => JsErrorKind::EvalError,
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_ => JsErrorKind::Error,
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}
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}
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fn js_error_kind_name(kind: JsErrorKind) -> &'static str {
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match kind {
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JsErrorKind::TypeError => "TypeError",
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JsErrorKind::RangeError => "RangeError",
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JsErrorKind::ReferenceError => "ReferenceError",
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JsErrorKind::SyntaxError => "SyntaxError",
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JsErrorKind::Error => "Error",
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JsErrorKind::URIError => "URIError",
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JsErrorKind::EvalError => "EvalError",
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}
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}
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pub(crate) fn format_error_message(name: &str, msg: &str) -> String {
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if name.is_empty() {
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msg.to_string()
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} else if msg.is_empty() {
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name.to_string()
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} else {
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format!("{name}: {msg}")
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}
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}
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#[allow(unused_macros)]
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macro_rules! throw_err {
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($self:ident, $kind:ident, $msg:expr) => {{
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match $self.raise_error_kind(stringify!($kind), $msg) {
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Ok(()) => continue,
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Err(e) => return Err(e),
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}
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}};
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}
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macro_rules! binary_arith {
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($self:ident, $a:expr, $b:expr, $rd:expr, $op:tt, $check_zero:expr) => {{
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let lv = $self.regs[$a];
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let rv = $self.regs[$b];
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if lv.is_int() && rv.is_int() {
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$self.regs[$rd] = JsValue::float(lv.as_int() as f64 $op rv.as_int() as f64);
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} else if lv.is_bigint() && rv.is_bigint() {
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let l = $self.bigint_value(lv).clone();
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let r = $self.bigint_value(rv).clone();
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if r.is_zero() && $check_zero {
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// 仅除/模对 BigInt 零除数抛 RangeError；SUB/MUL 等其余二元运算
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// 遇到 0n 必须正常计算（Number 路径走 f64 inf/NaN）。
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$self.raise_error_kind("RangeError", "Division by zero")?;
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$self.regs[$rd] = JsValue::undefined();
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} else {
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$self.regs[$rd] = $self.new_bigint(l $op r);
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}
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} else {
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// 注意：混合 BigInt/Number 检查不能在此前置（对象操作数如
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// `{valueOf: () => 2n}` 需先 ToPrimitive 再判定），统一放 coerce 之后。
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let l = $self.coerce_primitive_bounded(lv, false)?;
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let r = $self.coerce_primitive_bounded(rv, false)?;
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if l.is_bigint() && r.is_bigint() {
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// 包装对象 coerce 后暴露双 BigInt（如 Object(2n) / 2n）。
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let lv = $self.bigint_value(l).clone();
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let rv = $self.bigint_value(r).clone();
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if rv.is_zero() && $check_zero {
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$self.raise_error_kind("RangeError", "Division by zero")?;
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$self.regs[$rd] = JsValue::undefined();
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} else {
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$self.regs[$rd] = $self.new_bigint(lv $op rv);
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}
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} else if l.is_bigint() != r.is_bigint() {
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// 包装对象 coerce 后暴露 BigInt 混合（如 Object(1n) - 1）。
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$self.raise_type_error("Cannot mix BigInt and other types, use explicit conversions")?;
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$self.regs[$rd] = JsValue::undefined();
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} else {
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let ln = coercion::to_number(l);
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let rn = coercion::to_number(r);
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$self.regs[$rd] = JsValue::float(ln $op rn);
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}
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}
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}}
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}
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/// 调用帧被挂起后，恢复时需要继续的执行方式。
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///
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/// `AccessorGet` 表示 accessor getter 返回后需把结果写回 `target_reg`；
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/// `AccessorSet` 表示 setter 调用完成；`None` 为普通调用返回。
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#[derive(Debug, Clone, Copy)]
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pub enum FrameContinuation {
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None,
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AccessorGet { target_reg: u8 },
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AccessorSet,
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}
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/// 压帧实参来源：已物化切片或寄存器连续区间。
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///
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/// `RegRange` 直接引用调用方寄存器文件（CALL/NEW/SUPER_CALL 的实参在寄存器中
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/// 天然连续排列），免去临时堆 `Vec<JsValue>` 物化，每次调用省 1 次分配/释放。
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#[derive(Clone, Copy)]
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pub(crate) enum FrameArgs<'a> {
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/// 已物化实参：spread 展开、TailCall、accessor 与初始执行路径。
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Slice(&'a [JsValue]),
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/// 寄存器连续区间 `regs[first .. first+count)`。
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RegRange { first: u8, count: usize },
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}
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impl FrameArgs<'_> {
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/// 实参总数。
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pub(crate) fn len(&self) -> usize {
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match self {
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FrameArgs::Slice(s) => s.len(),
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FrameArgs::RegRange { count, .. } => *count,
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}
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}
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}
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/// 一次函数调用的调用帧：记录返回地址、调用方寄存器窗口与 `this`/`new.target`。
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///
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/// 调用方寄存器窗口在 `save_stack` 中按 `saved_reg_offset` 保存，返回时由
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/// `restore_frame` 恢复；`continuation` 描述 getter/setter 场景的恢复方式。
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pub struct CallFrame {
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pub return_addr: usize,
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pub function_name: u32,
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/// 压帧保存的调用方寄存器窗口长度（= save_stack 中本帧段大小）。
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/// 普通字节码调用按调用点存活上界截断；运行时发起（accessor/内联）为
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/// 调用方 `active_reg_limit` 全量。
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pub caller_reg_limit: u8,
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/// 压帧时刻调用方 `active_reg_limit`（真实值）：帧恢复时据此还原，与
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/// `caller_reg_limit`（可能被存活上界截断的窗口）解耦。
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pub caller_active_reg_limit: u8,
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pub saved_reg_offset: u32,
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/// 记录本帧 spill 栈起始长度，作为 SPILL/UNSPILL 的帧边界基址（push 时快照）。
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pub spill_offset: u32,
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/// 本帧完整实参在 spill 栈的起始下标（帧恢复时随 spill 区一起截断丢弃）。
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pub arguments_base: u32,
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/// 实际传入的实参个数（可大于形参个数）。
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pub arguments_count: u16,
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pub saved_this: JsValue,
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pub saved_new_target: JsValue,
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pub callee: JsValue,
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pub construct_result_reg: Option<u8>,
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pub constructed_this: Option<JsValue>,
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pub is_derived_constructor: bool,
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/// derived 构造帧是否已成功调用 super()（父构造器正常返回后置位）。
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///
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/// 置位识别依赖 ABI 不变量：`construct_result_reg == Some(254)` 仅 SUPER_CALL
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/// 压帧产生（emit 从寄存器 ≥1 分配，254 保留给 this）；父构造器抛错走 unwind
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/// 弹帧不进 do_return，不置位。此标志取代依赖 regs[254] 值判定 super 状态的
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/// 旧方案——多层继承时中间 derived 帧由 SUPER_CALL 以构造 this 压入，
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/// regs[254] 恒非 undefined，值判定三重失效。
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pub super_called: bool,
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/// 本帧函数的严格模式标志（来源：模块编译产物 `is_strict`）。
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/// 属性写失败时据此分派：严格模式抛 TypeError，sloppy 静默 no-op。
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pub strict: bool,
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pub continuation: FrameContinuation,
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}
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/// 一次 `for-in` 迭代的游标：已收集的 key 列表与当前下标。
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///
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/// 每个 key 与它的 intern id 配对保存，使整型下标 key 无需重新 intern 即可排到字符串 key 之前。
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pub struct ForInIter<'bump> {
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/// 每个 key 与其字符串 intern id 配对，使 for-in 排序时整型下标 key 无需
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/// 重新 intern 即可排到字符串 key 之前。
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pub keys: bumpalo::collections::Vec<'bump, (JsValue, u32)>,
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pub index: usize,
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}
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/// try/catch/finally 处理记录，异常展开时用于定位跳转目标与清理范围。
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#[derive(Debug, Clone, Copy)]
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pub struct TryHandler {
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pub catch_pc: Option<usize>,
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pub finally_pc: Option<usize>,
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/// finally 体是否已进入（normal JMP / 异常展开 / 完成穿越都会置位）。
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/// 用标志而非 pc 范围判定"当前是否执行 finally 体"：try 体末指令可能因 DCE
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/// 紧贴 finally 入口，pc 边界会误判。
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pub finally_active: bool,
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pub frame_depth: usize,
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/// try 入口时 for_of_iters 的长度，界定异常展开时哪些迭代器需要 IteratorClose。
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pub for_of_depth: usize,
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}
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/// 控制流完成：break/continue/return 逃出 finally 域时暂存的完成目标。
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///
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/// 仿 `pending_exception` 的侧通道：finally 执行期间悬挂在此，由 TRY_FINALLY_END
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/// 逐个恢复（`remaining_finally` 为仍需穿越的 finally 体数，进入一个递减一个）。
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/// `for_of_count`/`for_in_count` 为逃出时需关闭的迭代器层数：在全部 finally 穿越
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/// 之后、跳转/返回之前执行（规范 §13.7.5.4 的 IteratorClose 在完成值之后）。
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#[derive(Debug, Clone, Copy)]
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pub enum Completion {
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Break {
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target_pc: usize,
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remaining_finally: usize,
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for_of_count: usize,
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for_in_count: usize,
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},
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Continue {
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target_pc: usize,
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remaining_finally: usize,
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for_of_count: usize,
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for_in_count: usize,
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},
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Return {
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value: JsValue,
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remaining_finally: usize,
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for_of_count: usize,
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for_in_count: usize,
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},
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}
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impl Completion {
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/// 仍需穿越的 finally 体数。
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pub fn remaining_finally(&self) -> usize {
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match *self {
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Completion::Break { remaining_finally, .. }
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| Completion::Continue { remaining_finally, .. }
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| Completion::Return { remaining_finally, .. } => remaining_finally,
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}
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}
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/// 逃出时需关闭的 for-of 迭代器层数。
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pub fn for_of_count(&self) -> usize {
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match *self {
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Completion::Break { for_of_count, .. }
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| Completion::Continue { for_of_count, .. }
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| Completion::Return { for_of_count, .. } => for_of_count,
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}
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}
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/// 逃出时需弹出的 for-in 迭代器层数。
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pub fn for_in_count(&self) -> usize {
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match *self {
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Completion::Break { for_in_count, .. }
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| Completion::Continue { for_in_count, .. }
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| Completion::Return { for_in_count, .. } => for_in_count,
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}
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}
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/// 复制并改写剩余 finally 计数（进入一个 finally 后递减）。
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pub fn with_remaining(&self, remaining: usize) -> Completion {
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match *self {
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Completion::Break {
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target_pc,
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for_of_count,
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for_in_count,
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..
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} => Completion::Break {
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target_pc,
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remaining_finally: remaining,
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for_of_count,
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for_in_count,
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},
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Completion::Continue {
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target_pc,
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for_of_count,
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for_in_count,
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..
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} => Completion::Continue {
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target_pc,
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remaining_finally: remaining,
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for_of_count,
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for_in_count,
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},
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Completion::Return {
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value,
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for_of_count,
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for_in_count,
|
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..
|
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} => Completion::Return {
|
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value,
|
||
remaining_finally: remaining,
|
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for_of_count,
|
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for_in_count,
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},
|
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}
|
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}
|
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}
|
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|
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/// `call_bytecode_function_inline` 使用的堆分配快照。
|
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/// 放在堆上避免 JS 代码链式同步字节码调用（如 sort 比较器、accessor）时
|
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/// 耗尽 Rust 栈。
|
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pub(crate) struct InlineSyncState {
|
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/// 寄存器窗口副本：`regs[0..len]`，len ≤ 254（含 RegAlloc 最高合法物理槽
|
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/// 253）。`regs[254]/[255]` 不在此列，由 `saved_this`/`saved_new_target`
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/// 单独保存（callee 也会重写这两个槽）。
|
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pub(crate) regs: Box<[JsValue]>,
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pub(crate) saved_this: JsValue,
|
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pub(crate) saved_new_target: JsValue,
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pub(crate) pc: usize,
|
||
pub(crate) bytecode: Arc<[opcode::Instr]>,
|
||
pub(crate) active_immutables: *const [JsValue],
|
||
pub(crate) active_reg_limit: u8,
|
||
pub(crate) root_reg_limit: u8,
|
||
pub(crate) try_stack: Vec<TryHandler>,
|
||
pub(crate) frames: SmallVec<[CallFrame; 16]>,
|
||
pub(crate) exception_value: Option<JsValue>,
|
||
pub(crate) pending_exception: Option<JsValue>,
|
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pub(crate) pending_error_kind: Option<&'static str>,
|
||
pub(crate) pending_completion: Option<Completion>,
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pub(crate) for_in_iters: Vec<*mut ForInIter<'static>>,
|
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pub(crate) for_of_iters: Vec<ForOfEntry>,
|
||
pub(crate) saved_bytecode_stack: Vec<Arc<[opcode::Instr]>>,
|
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pub(crate) saved_immutables_stack: Vec<*const [JsValue]>,
|
||
pub(crate) save_stack: Vec<JsValue>,
|
||
pub(crate) spill_stack: Vec<JsValue>,
|
||
pub(crate) cell_stack: Vec<Vec<*mut Cell>>,
|
||
pub(crate) inline_callee: Option<JsValue>,
|
||
/// inline 目标函数的严格模式标志（内联执行期间写路径的 strict/sloppy 判定
|
||
/// 来源；嵌套内联时随本快照保存/恢复）。
|
||
pub(crate) inline_strict: bool,
|
||
/// inline 起始时 `frames.len()` 基线（嵌套内联时随本快照保存/恢复）。
|
||
pub(crate) inline_frames_base: usize,
|
||
pub(crate) inline_args_base: u32,
|
||
pub(crate) inline_args_count: u16,
|
||
pub(crate) accessor_frame_target_reg: Option<u8>,
|
||
pub(crate) active_flat_id: u32,
|
||
}
|
||
|
||
/// 基于寄存器的 JS 虚拟机：持有执行状态、寄存器文件、调用栈与 session 内存。
|
||
///
|
||
/// 执行入口为 [`Vm::run`]（见 `vm_runtime` 模块）；内存模型为 epoch arena +
|
||
/// session 对象（可被 `SessionGc` 移动式回收）+ session 字符串。多数内部字段为
|
||
/// `pub(crate)`，对外提供统计与内省 getter。
|
||
pub struct Vm {
|
||
pub(crate) regs: [JsValue; 256],
|
||
pub(crate) pc: usize,
|
||
/// 当前活动字节码。以 `Arc<[Instr]>` 共享：函数调用经 `Arc::clone` 换帧（O(1)），
|
||
/// 不再逐帧深拷贝。与 sub_modules 源共享同一缓冲，IC 写回经 `bytecode_mut` 的
|
||
/// `Arc::make_mut` 写时复制，保证独占后才改写（miss 时才深拷贝，频率低）。
|
||
pub(crate) bytecode: Arc<[opcode::Instr]>,
|
||
/// 每次 run 转换一次的不可变常量缓存。下标 0 = 顶层模块，sub_idx+1 = sub_modules[sub_idx]。
|
||
/// 每个 `OnceLock` 保存该模块常量本次运行中只转换一次的 `JsValue` 结果，每次 `run()` 重建。
|
||
/// 不可变常量是标量 + perm 字符串，只读，不作为 GC 根。
|
||
pub(crate) immutables_cache: Vec<OnceLock<Vec<JsValue>>>,
|
||
/// 当前活动模块已转换不可变常量的只读视图（指向 immutables_cache 内部）。
|
||
/// 用胖 `*const`：缓存 Vec 归 VM 所有且本次运行稳定（OnceLock 只填一次）。
|
||
pub(crate) active_immutables: *const [JsValue],
|
||
pub(crate) frames: SmallVec<[CallFrame; 16]>,
|
||
pub(crate) kernel_core: Arc<KernelCore>,
|
||
pub(crate) session: KernelSession,
|
||
/// `"length"` 属性键的 intern id 缓存：进程内稳定（PermInterner append-only、
|
||
/// KernelCore 不重建），属性 get/set 热路径免每次 intern（hash64 + DashMap +
|
||
/// RwLock 读锁）。
|
||
pub(crate) length_si: u32,
|
||
pub epoch: Epoch,
|
||
pub object_prototype: P<JsObject>,
|
||
/// `%GeneratorPrototype%`：生成器实例的原型（next/return/throw 方法挂此）。
|
||
pub generator_proto: P<JsObject>,
|
||
/// `%GeneratorFunction.prototype%`：生成器函数对象的原型（`constructor` 指向
|
||
/// `%GeneratorFunction%`，使 `g.constructor.name` 解析为 "GeneratorFunction"）。
|
||
pub generator_function_proto: P<JsObject>,
|
||
/// `%Promise%` 构造器（resolve/reject 静态方法挂此，global 的 Promise 槽指向它）。
|
||
pub promise_constructor: P<JsObject>,
|
||
/// `%Promise.prototype%`：Promise 实例的原型（then/catch/finally 方法挂此）。
|
||
pub promise_proto: P<JsObject>,
|
||
/// `%AggregateError%` 构造器（Promise.any 拒绝时构造 AggregateError 用）。
|
||
pub aggregate_error_constructor: P<JsObject>,
|
||
/// `%AggregateError.prototype%`（proto = %Error.prototype%）。
|
||
pub aggregate_error_proto: P<JsObject>,
|
||
/// `%AsyncFunction.prototype%`：异步函数对象的原型（`constructor` 指向 `%AsyncFunction%`）。
|
||
pub async_function_proto: P<JsObject>,
|
||
/// `%AsyncGeneratorPrototype%`：异步生成器实例的原型（next/return/throw/@@asyncIterator）。
|
||
pub async_generator_proto: P<JsObject>,
|
||
/// `%AsyncGeneratorFunction.prototype%`：异步生成器函数对象的原型。
|
||
pub async_generator_function_proto: P<JsObject>,
|
||
/// 微任务队列（Promise reactions / thenable 委托），`run()` 末尾 FIFO drain。
|
||
pub(crate) job_queue: VecDeque<crate::promise::Microtask>,
|
||
pub math_rng_state: u64,
|
||
/// 全局扁平模块表：下标 = 模块 `flat_id`（顶层 0，子模块 flatten 后全局唯一）。
|
||
/// 闭包 `sub_module_index` 即 flat_id，逃逸闭包也能自足解析。
|
||
/// 条目为 `Arc<CompiledModule>`，与调用方模块树共享（`run()` 只做 Arc::clone，
|
||
/// 不再每次深拷贝整棵子树）。
|
||
pub(crate) sub_modules: Arc<Vec<Arc<CompiledModule>>>,
|
||
/// 帧切换时暂存调用方字节码的 Arc 栈（与 `bytecode` 同共享语义）。
|
||
pub(crate) saved_bytecode_stack: Vec<Arc<[opcode::Instr]>>,
|
||
pub(crate) saved_immutables_stack: Vec<*const [JsValue]>,
|
||
/// 共享寄存器保存栈。每个活动 `CallFrame` 在 push 时把调用方活跃寄存器
|
||
/// （`regs[..caller_reg_limit]`）按 `saved_reg_offset` 存到这里；恢复时复制回
|
||
/// 并截断。容量跨调用保留，避免每次调用堆分配。
|
||
pub(crate) save_stack: Vec<JsValue>,
|
||
/// VM 级 spill 栈。`CallFrame.spill_offset` 定位本帧区：调用子函数时从边界后分配，
|
||
/// 帧恢复时截断到边界，子函数 spill 数据随帧丢弃。
|
||
pub(crate) spill_stack: Vec<JsValue>,
|
||
/// 本次 native 调用的 spill 溢出实参区：`spill_stack[base..base+count)`。
|
||
/// 实参数超过寄存器窗口（253）时，窗口外的实参转存 spill 栈（GC 根），
|
||
/// native 侧经 `VmHost::native_arg_count`/`native_arg_at` 读取。仅在一次
|
||
/// native 调用期间有效，调用返回前截断回收。
|
||
pub(crate) native_overflow_base: usize,
|
||
pub(crate) native_overflow_count: usize,
|
||
pub(crate) try_stack: Vec<TryHandler>,
|
||
pub(crate) exception_value: Option<JsValue>,
|
||
/// 同步调用抛出的原始 JsValue 侧通道：`call_function_sync`/`unwind` 把错误展平为
|
||
/// String 后，for-of 需要重新抛出原值。放在 VM 顶层字段（不在 InlineSyncState 中）
|
||
/// 以便跨内联调用的恢复过程存活。
|
||
pub(crate) last_uncaught_value: Option<JsValue>,
|
||
pub(crate) pending_exception: Option<JsValue>,
|
||
pub(crate) pending_error_kind: Option<&'static str>,
|
||
/// 控制流完成（break/continue/return）暂存，finally 执行后由 TRY_FINALLY_END 恢复。
|
||
pub(crate) pending_completion: Option<Completion>,
|
||
pub(crate) root_reg_limit: u8,
|
||
pub(crate) active_reg_limit: u8,
|
||
pub(crate) native_call_depth: usize,
|
||
/// inline 同步调用（`call_bytecode_function_inline`，frames 为空）的实参区位置。
|
||
/// frames 非空时 CREATE_ARGUMENTS 优先读当前帧的实参区；此字段只服务内联路径。
|
||
pub(crate) inline_args_base: u32,
|
||
pub(crate) inline_args_count: u16,
|
||
/// `ordinary_get` 压入字节码 accessor 帧时设为 Some(target_reg)。
|
||
/// 调度循环检查该标志，跳过用调用结果写 `regs[target_reg]` —— 值改由 RETURN
|
||
/// 处理器交付。
|
||
pub(crate) accessor_frame_target_reg: Option<u8>,
|
||
/// `call_bytecode_function_inline` 执行期间当前回调闭包；LOAD/STORE_UPVALUE 在
|
||
/// frames 为空（inline 隔离状态）时由此取闭包 upvalues。嵌套 inline 由
|
||
/// InlineSyncState 保存/恢复。
|
||
pub(crate) inline_callee: Option<JsValue>,
|
||
/// inline 目标函数的严格模式标志（与 `inline_callee` 同生命周期，
|
||
/// InlineSyncState 保存/恢复）：内联执行期间帧表被隔离，写路径的
|
||
/// strict/sloppy 判定取此值而非帧标志。
|
||
pub(crate) inline_strict: bool,
|
||
/// inline 起始时 `frames.len()` 基线（随 InlineSyncState 保存/恢复）：
|
||
/// 内联执行中新压的帧（CALL/accessor）越过该基线，其严格性归帧栈顶。
|
||
pub(crate) inline_frames_base: usize,
|
||
/// 本次 run 顶层脚本的严格模式标志（`module.is_strict`，run 时填充）：
|
||
/// 无帧且无 inline（顶层脚本赋值）时写路径的 strict/sloppy 判定来源。
|
||
pub(crate) top_level_strict: bool,
|
||
/// inline 同步调用寄存器窗口缓冲池：`save_inline_state` 取出复用、
|
||
/// `restore_inline_state` 归还。热回调循环内 save/restore 反复使用同一块
|
||
/// 缓冲，只在嵌套（池已被外层取走）时新分配。
|
||
pub(crate) inline_reg_pool: Option<Vec<JsValue>>,
|
||
/// 生成器体 `dispatch()` 让出时的信号：YIELD 置 Some(让出值)，恢复方（
|
||
/// generator 内嵌 dispatch 循环）取走并判定挂起。None = 正常返回/异常。
|
||
pub(crate) generator_suspended: Option<JsValue>,
|
||
/// `yield*` 委托中的内层迭代器：YIELD_STAR 让出时置入，恢复时转发 next/return/throw
|
||
/// 后按结局清空。随生成器挂起/恢复经 GeneratorState 传递（snapshot/rewrite 共管）。
|
||
pub(crate) delegated_iterator: Option<JsValue>,
|
||
/// 当前是否处于生成器内嵌 dispatch 循环：生成器帧弹出且 frames 清空时，
|
||
/// `do_return` 据此把结果交付给恢复方（而非当作普通顶层返回继续执行）。
|
||
pub(crate) generator_dispatch: bool,
|
||
/// 生成器调用时参数初始化步：body 起点标记（SUSPEND_BODY）据此判定"挂起在 body 前"。
|
||
pub(crate) generator_init_step: bool,
|
||
/// 参数初始化步中已越过 body 起点标记的信号（`initialize_generator` 消费后复位）。
|
||
pub(crate) generator_body_started: bool,
|
||
/// 当前正在执行的异步函数上下文对象（`OBJ_TYPE_ASYNC`，持有 AsyncState 快照）。
|
||
/// AWAIT dispatch 据此登记恢复反应；跨嵌套 async 调用保存/恢复。
|
||
pub(crate) async_context: Option<JsValue>,
|
||
/// 异步体 `dispatch()` 让出时的信号：AWAIT 置 true，恢复方（async 内嵌 dispatch
|
||
/// 循环）取走并快照挂起状态。false = 正常返回/异常。
|
||
pub(crate) async_suspended: bool,
|
||
/// 当前是否处于异步函数内嵌 dispatch 循环：异步帧弹出且 frames 清空时，
|
||
/// `do_return` 据此把结果交付给恢复方（与 generator_dispatch 同语义）。
|
||
pub(crate) async_dispatch: bool,
|
||
/// 当前是否处于构造器内嵌 dispatch 循环（`call_constructor_bytecode_inline`）：
|
||
/// 构造帧弹出且 frames 清空时，`do_return` 据此把构造结果（regs[0]，
|
||
/// 已做非对象回退 this）交付给恢复方（与 generator_dispatch 同语义）。
|
||
pub(crate) construct_dispatch: bool,
|
||
/// 当前正在执行的异步生成器上下文对象（`OBJ_TYPE_ASYNC_GENERATOR`，持有
|
||
/// `AsyncGeneratorState` 快照）。AWAIT dispatch 据此登记异步生成器恢复反应；
|
||
/// 跨嵌套 async 调用保存/恢复（与 `async_context` 同生命周期，二者互斥占用）。
|
||
pub(crate) async_gen_context: Option<JsValue>,
|
||
/// 当前是否处于异步生成器内嵌 dispatch 循环：AWAIT 据此走异步生成器恢复
|
||
/// 闭包；yield 让出复用 `generator_suspended` 信号。
|
||
pub(crate) async_gen_dispatch: bool,
|
||
/// 异步生成器 body `dispatch()` 的 AWAIT 让出信号：置 true 表示挂起在 await，
|
||
/// 恢复方（异步生成器内嵌 dispatch 循环）据此快照挂起状态。
|
||
pub(crate) async_gen_suspended: bool,
|
||
/// 分组保存 session arena / GC 簿记状态。
|
||
pub(crate) gc_state: GcState,
|
||
/// 分组保存 `Symbol` intern 状态。
|
||
pub(crate) symbols: SymbolState,
|
||
/// 分组保存活跃的 for-in / for-of 迭代器状态。
|
||
pub(crate) iters: IterState,
|
||
/// 分组保存 inline cache 与指令计数器。
|
||
pub(crate) profiling: ProfilingState,
|
||
pub(crate) cell_stack: Vec<Vec<*mut Cell>>,
|
||
/// 标签模板对象缓存（GetTemplateObject）：键 = (模块 flat_id, site 序号)。
|
||
/// 同一编译树同 site 恒返回同一对象；每次 `run()` 清空（flat_id 复用防误命中）。
|
||
/// 值为 GC 根（for_each_value/rewrite_values 遍历）。
|
||
pub(crate) template_objects: HashMap<(u32, u32), JsValue>,
|
||
/// 当前活动字节码所属模块的 flat_id（顶层 0；帧切换时随 bytecode 换）。
|
||
/// GET_TEMPLATE_OBJECT 据其区分不同编译树（eval 每次编译独立 site）。
|
||
pub(crate) active_flat_id: u32,
|
||
/// 帧切换时暂存调用方 flat_id 的栈（与 saved_bytecode_stack 同步 push/pop）。
|
||
pub(crate) saved_flat_id_stack: Vec<u32>,
|
||
}
|
||
|
||
impl Drop for Vm {
|
||
fn drop(&mut self) {
|
||
// 直接 drop（test262 每测试新建即弃）不经 reset/full_reset 路径：
|
||
// 统一收尾释放全部 session 堆数据，防逐测试累积泄漏。
|
||
self.teardown_session_heap_data();
|
||
}
|
||
}
|
||
|
||
impl Vm {
|
||
const SYNC_NATIVE_ARG_BASE: usize = 0;
|
||
const SYNC_NATIVE_ARG_LIMIT: usize = 253;
|
||
|
||
pub(crate) fn coerce_primitive_bounded(&mut self, value: JsValue, prefer_string: bool) -> Result<JsValue, String> {
|
||
if !value.is_object() {
|
||
return Ok(value);
|
||
}
|
||
|
||
let obj_ptr = value.as_js_object_ptr();
|
||
if obj_ptr.is_null() {
|
||
return Ok(value);
|
||
}
|
||
|
||
// ECMA-262 §7.1.1 step 1: an exotic obj[Symbol.toPrimitive] takes precedence
|
||
// over OrdinaryToPrimitive. well-known symbol 键经 property_key_si 映射为
|
||
// 固定 Symbol 键，读键路径与写键路径一致。
|
||
let sym_key = {
|
||
let sym_ptr = self.session.builtin_world().sym_to_primitive.as_ptr() as *mut JsObject;
|
||
JsValue::from_js_object(sym_ptr)
|
||
};
|
||
let sym_si = self.property_key_si(sym_key)?;
|
||
let exotic = {
|
||
let obj = unsafe { &*obj_ptr };
|
||
self.ordinary_get(obj, sym_si, value)?
|
||
};
|
||
if !exotic.is_undefined() && !exotic.is_null() {
|
||
let exotic_ptr = exotic.as_js_object_ptr();
|
||
if !exotic.is_object() || exotic_ptr.is_null() || !unsafe { &*exotic_ptr }.is_function() {
|
||
// 抛可捕获的 JS 异常（dispatch 层 try/catch 可捕获），见 conversion_error。
|
||
self.conversion_error("Symbol.toPrimitive is not a function")?;
|
||
return Ok(JsValue::undefined());
|
||
}
|
||
let hint_val = self.new_string(if prefer_string { "string" } else { "number" });
|
||
let result = match self.call_function_sync(exotic, value, &[hint_val]) {
|
||
Ok(r) => r,
|
||
Err(err) => return self.raise_call_error(&err),
|
||
};
|
||
if result.is_object() {
|
||
self.conversion_error("Cannot convert object to primitive value")?;
|
||
return Ok(JsValue::undefined());
|
||
}
|
||
return Ok(result);
|
||
}
|
||
|
||
let method_names = if prefer_string { ["toString", "valueOf"] } else { ["valueOf", "toString"] };
|
||
|
||
for method_name in method_names {
|
||
let method_si = self.kernel_core.perm_interner().intern(method_name).0;
|
||
let method = {
|
||
let obj = unsafe { &*obj_ptr };
|
||
self.ordinary_get(obj, method_si, value)?
|
||
};
|
||
if method.is_undefined() || method.is_null() {
|
||
continue;
|
||
}
|
||
// OrdinaryToPrimitive：valueOf/toString 不可调用时跳过（IsCallable == false
|
||
// 则 continue），不抛错；仅 @@toPrimitive 不可调用时抛 TypeError。
|
||
if !method.is_object() {
|
||
continue;
|
||
}
|
||
let method_ptr = method.as_js_object_ptr();
|
||
if method_ptr.is_null() || !unsafe { &*method_ptr }.is_function() {
|
||
continue;
|
||
}
|
||
|
||
let result = match self.call_function_sync(method, value, &[]) {
|
||
Ok(r) => r,
|
||
Err(err) => return self.raise_call_error(&err),
|
||
};
|
||
if !result.is_object() {
|
||
return Ok(result);
|
||
}
|
||
}
|
||
|
||
// 主 dispatch 抛可捕获异常（外围 JS try/catch 可捕获）；原生 builtin 内部
|
||
// 只传播格式化 Err，由其调用边界恢复为异常对象（见 conversion_error）。
|
||
self.conversion_error("Cannot convert object to primitive value")?;
|
||
Ok(JsValue::undefined())
|
||
}
|
||
|
||
/// 对象转原始值失败时的统一出口：主 dispatch（native_call_depth == 0）下抛可捕获
|
||
/// 的 JS 异常并就地展开到外围 try/catch；原生 builtin 内部（depth > 0）不得就地
|
||
/// 展开（展开会消费 try 处理器，builtin 却继续执行并可能产生二次错误），改为返回
|
||
/// 格式化 Err，由原生调用边界（call_function_sync → dispatch_native_call）恢复为
|
||
/// 原始异常对象。
|
||
#[inline(always)]
|
||
fn conversion_error(&mut self, msg: &str) -> Result<(), String> {
|
||
if self.native_call_depth == 0 {
|
||
self.raise_error_kind("TypeError", msg)
|
||
} else {
|
||
Err(self.error_message_text("TypeError", msg))
|
||
}
|
||
}
|
||
|
||
/// 把 `call_function_sync` 返回的调用错误恢复为原始异常值并走异常展开，
|
||
/// 使外围 try/catch 可捕获（native 函数抛错时原值存于 `last_uncaught_value`）。
|
||
///
|
||
/// # 注意事项
|
||
/// 仅在主 dispatch（`native_call_depth == 0`）下展开——此时 try_stack 只含当前
|
||
/// 字节码的处理器，展开后 pc/regs[0] 不会被中途的原生调用栈覆盖。原生 builtin
|
||
/// 内部（depth > 0）必须传播错误，由其调用边界（dispatch_native_call）转换。
|
||
pub(crate) fn raise_call_error(&mut self, err: &str) -> Result<JsValue, String> {
|
||
if self.native_call_depth == 0 {
|
||
let exc = self
|
||
.last_uncaught_value
|
||
.take()
|
||
.unwrap_or_else(|| oxide_builtins::error::create_from_text(self, err));
|
||
let kind = self.thrown_error_kind(exc);
|
||
self.exception_value = Some(exc);
|
||
self.pending_error_kind = Some(kind);
|
||
self.unwind()?;
|
||
return Ok(JsValue::undefined());
|
||
}
|
||
Err(err.to_string())
|
||
}
|
||
|
||
pub(crate) fn coerce_number_bounded(&mut self, value: JsValue) -> Result<f64, String> {
|
||
let primitive = self.coerce_primitive_bounded(value, false)?;
|
||
Ok(coercion::to_number(primitive))
|
||
}
|
||
|
||
pub(crate) fn coerce_int32_bounded(&mut self, value: JsValue) -> Result<i32, String> {
|
||
if value.is_int() {
|
||
return Ok(value.as_int());
|
||
}
|
||
let n = self.coerce_number_bounded(value)?;
|
||
if n == 0.0 || !n.is_finite() {
|
||
return Ok(0);
|
||
}
|
||
let int = n.trunc().rem_euclid(4_294_967_296.0) as u32;
|
||
if int > i32::MAX as u32 {
|
||
Ok((int as i64 - 4_294_967_296i64) as i32)
|
||
} else {
|
||
Ok(int as i32)
|
||
}
|
||
}
|
||
|
||
pub(crate) fn coerce_uint32_bounded(&mut self, value: JsValue) -> Result<u32, String> {
|
||
if value.is_int() {
|
||
return Ok(value.as_int() as u32);
|
||
}
|
||
let n = self.coerce_number_bounded(value)?;
|
||
if n == 0.0 || !n.is_finite() {
|
||
return Ok(0);
|
||
}
|
||
Ok(n.trunc().rem_euclid(4_294_967_296.0) as u32)
|
||
}
|
||
|
||
fn pack_sync_native_call_args(&mut self, receiver: JsValue, callee: JsValue, args: &[JsValue]) -> Vec<u8> {
|
||
self.regs[253] = receiver;
|
||
self.regs[254] = callee;
|
||
|
||
let mut arg_regs = Vec::with_capacity(args.len() + 1);
|
||
arg_regs.push(253);
|
||
for (idx, arg) in args.iter().enumerate() {
|
||
let reg = (Self::SYNC_NATIVE_ARG_BASE + idx) as u8;
|
||
self.regs[reg as usize] = *arg;
|
||
arg_regs.push(reg);
|
||
}
|
||
arg_regs
|
||
}
|
||
|
||
pub(crate) fn is_session_ptr(&self, obj_ptr: *mut JsObject) -> bool {
|
||
if obj_ptr.is_null() {
|
||
return false;
|
||
}
|
||
// SAFETY: obj_ptr 非空且指向本 session 拥有的 JsObject。
|
||
unsafe { (*obj_ptr).is_session_epoch() }
|
||
}
|
||
|
||
pub(crate) fn alloc_object(&mut self, obj: JsObject) -> *mut JsObject {
|
||
let ptr = self.epoch.alloc(obj);
|
||
self.gc_state.track_epoch_object(ptr);
|
||
ptr
|
||
}
|
||
|
||
/// 活动模块已转换不可变常量的只读视图；任何 `run()` 之前为空。
|
||
#[inline(always)]
|
||
pub(crate) fn immutables(&self) -> &[JsValue] {
|
||
if self.active_immutables.is_null() {
|
||
&[]
|
||
} else {
|
||
// SAFETY: active_immutables 指向 VM 拥有的 immutables_cache 内的 OnceLock<Vec<JsValue>>，
|
||
// Vec 只填充一次，本次运行期间不再重分配。
|
||
unsafe { &*self.active_immutables }
|
||
}
|
||
}
|
||
|
||
/// 激活模块 `cache_idx` 的不可变常量（0 = 顶层，sub_idx+1 = sub_modules[sub_idx]），
|
||
/// 只转换一次存入 `immutables_cache[cache_idx]`，并把 `active_immutables` 指向该 Vec。
|
||
/// `constants` 由调用方传入（它已持有 `&module.constants`）。
|
||
pub(crate) fn activate_immutables(&mut self, cache_idx: usize, constants: &[Constant]) {
|
||
// 用裸指针访问缓存槽，避免 get_or_init（借用 immutables_cache）与 &self 的
|
||
// convert_immutables 闭包和随后对 active_immutables 的写入发生借用冲突。
|
||
// 成立前提：immutables_cache 归 VM 所有、只读、本次运行稳定。
|
||
let slot: *const OnceLock<Vec<JsValue>> = &self.immutables_cache[cache_idx];
|
||
let vec = unsafe { &*slot }.get_or_init(|| self.convert_immutables(constants));
|
||
self.active_immutables = vec.as_slice() as *const [JsValue];
|
||
}
|
||
|
||
/// 当前活动字节码的可变访问入口。bytecode 以 `Arc<[Instr]>` 与 sub_modules 源共享，
|
||
/// IC 写回经 `Arc::make_mut` 保证独占：独占时零拷贝原地写，共享时先深拷贝再写
|
||
/// （IC miss 才触发，频率低）。所有写操作必须经此方法，防止共享缓冲被多实例污染。
|
||
pub(crate) fn bytecode_mut(&mut self) -> &mut [opcode::Instr] {
|
||
Arc::make_mut(&mut self.bytecode)
|
||
}
|
||
|
||
/// GC 根收集的统一遍历（对象与字符串都产出）。与 `rewrite_values` 字段一一对应。
|
||
/// 覆盖执行核心的全部 JsValue 持有点：regs/帧/各栈段/cell/在途异常与完成/
|
||
/// 挂起信号/迭代器/微任务/global。新增执行字段必须同时登记在此与
|
||
/// `rewrite_values`。
|
||
pub(crate) fn for_each_value(&self, mut f: impl FnMut(JsValue)) {
|
||
for value in &self.regs {
|
||
f(*value);
|
||
}
|
||
// immutables 缓存含 session BigInt（new_bigint 分配），未入根则被 sweep 释放
|
||
// → 常量池加载时悬垂。perm 字符串无害（不在 session 集合中）。
|
||
for once_lock in &self.immutables_cache {
|
||
if let Some(immutable_vec) = once_lock.get() {
|
||
for &value in immutable_vec.iter() {
|
||
f(value);
|
||
}
|
||
}
|
||
}
|
||
for frame in &self.frames {
|
||
f(frame.saved_this);
|
||
f(frame.saved_new_target);
|
||
f(frame.callee);
|
||
f(frame.constructed_this.unwrap_or(JsValue::undefined()));
|
||
}
|
||
for &v in &self.save_stack {
|
||
f(v);
|
||
}
|
||
// spill 栈是 session GC 根（漏根 → 溢出值被回收 → use-after-free）。
|
||
for &v in &self.spill_stack {
|
||
f(v);
|
||
}
|
||
for cell_vec in &self.cell_stack {
|
||
for &cell_ptr in cell_vec {
|
||
if cell_ptr.is_null() {
|
||
continue;
|
||
}
|
||
// SAFETY: cell 由 session_epoch 分配，本 session 内指针有效。
|
||
f(unsafe { &*cell_ptr }.value);
|
||
}
|
||
}
|
||
f(self.exception_value.unwrap_or(JsValue::undefined()));
|
||
f(self.pending_exception.unwrap_or(JsValue::undefined()));
|
||
f(self.last_uncaught_value.unwrap_or(JsValue::undefined()));
|
||
// 悬挂的 return 完成持有返回值，是 GC 根。
|
||
if let Some(Completion::Return { value, .. }) = self.pending_completion {
|
||
f(value);
|
||
}
|
||
f(self.generator_suspended.unwrap_or(JsValue::undefined()));
|
||
f(self.delegated_iterator.unwrap_or(JsValue::undefined()));
|
||
f(self.async_context.unwrap_or(JsValue::undefined()));
|
||
f(self.async_gen_context.unwrap_or(JsValue::undefined()));
|
||
f(self.inline_callee.unwrap_or(JsValue::undefined()));
|
||
// 标签模板对象缓存：命中的模板对象是 GC 根（未根 → sweep 搬移/回收悬垂）。
|
||
for &cached in self.template_objects.values() {
|
||
f(cached);
|
||
}
|
||
for &entry in &self.iters.for_of_iters {
|
||
f(entry.iterator);
|
||
f(entry.last_result);
|
||
}
|
||
// 微任务队列中的处理器/能力/值都是 GC 根。
|
||
for job in &self.job_queue {
|
||
crate::promise::for_each_job_value(job, &mut f);
|
||
}
|
||
for iter in &self.iters.for_in_iters {
|
||
if iter.is_null() {
|
||
continue;
|
||
}
|
||
// SAFETY: for_in_iters 存放由当前 VM epoch 拥有的存活迭代器指针。
|
||
unsafe {
|
||
for (v, _si) in (*(*iter)).keys.iter() {
|
||
f(*v);
|
||
}
|
||
}
|
||
}
|
||
f(JsValue::from_js_object(self.session.global_object().as_ptr() as *mut JsObject));
|
||
}
|
||
|
||
/// GC 指针重写（session 搬移后调用）。与 `for_each_value` 字段一一对应。
|
||
pub(crate) fn rewrite_values(&mut self, mut rewrite: impl FnMut(JsValue) -> JsValue) {
|
||
for value in &mut self.regs {
|
||
*value = rewrite(*value);
|
||
}
|
||
for frame in &mut self.frames {
|
||
frame.saved_this = rewrite(frame.saved_this);
|
||
frame.saved_new_target = rewrite(frame.saved_new_target);
|
||
frame.callee = rewrite(frame.callee);
|
||
frame.constructed_this = frame.constructed_this.map(&mut rewrite);
|
||
}
|
||
for v in &mut self.save_stack {
|
||
*v = rewrite(*v);
|
||
}
|
||
for v in &mut self.spill_stack {
|
||
*v = rewrite(*v);
|
||
}
|
||
for cell_vec in &mut self.cell_stack {
|
||
for &mut cell_ptr in cell_vec.iter_mut() {
|
||
if cell_ptr.is_null() {
|
||
continue;
|
||
}
|
||
// SAFETY: cell 由 session_epoch 分配，本 session 内指针有效。
|
||
let cell = unsafe { &mut *cell_ptr };
|
||
cell.value = rewrite(cell.value);
|
||
}
|
||
}
|
||
self.exception_value = self.exception_value.map(&mut rewrite);
|
||
self.pending_exception = self.pending_exception.map(&mut rewrite);
|
||
self.last_uncaught_value = self.last_uncaught_value.map(&mut rewrite);
|
||
for cached in self.template_objects.values_mut() {
|
||
*cached = rewrite(*cached);
|
||
}
|
||
self.pending_completion = self.pending_completion.map(|completion| match completion {
|
||
Completion::Return {
|
||
value,
|
||
remaining_finally,
|
||
for_of_count,
|
||
for_in_count,
|
||
} => Completion::Return {
|
||
value: rewrite(value),
|
||
remaining_finally,
|
||
for_of_count,
|
||
for_in_count,
|
||
},
|
||
other => other,
|
||
});
|
||
self.generator_suspended = self.generator_suspended.map(&mut rewrite);
|
||
self.delegated_iterator = self.delegated_iterator.map(&mut rewrite);
|
||
self.async_context = self.async_context.map(&mut rewrite);
|
||
self.async_gen_context = self.async_gen_context.map(&mut rewrite);
|
||
self.inline_callee = self.inline_callee.map(&mut rewrite);
|
||
for entry in &mut self.iters.for_of_iters {
|
||
entry.iterator = rewrite(entry.iterator);
|
||
entry.last_result = rewrite(entry.last_result);
|
||
}
|
||
// 微任务队列中的值随 sweep 重写。
|
||
for job in &mut self.job_queue {
|
||
crate::promise::rewrite_job_values(job, &mut rewrite);
|
||
}
|
||
for iter in &mut self.iters.for_in_iters {
|
||
if iter.is_null() {
|
||
continue;
|
||
}
|
||
// SAFETY: for_in_iters 存放由当前 VM epoch 拥有的存活迭代器指针。
|
||
unsafe {
|
||
for (v, _si) in (*(*iter)).keys.iter_mut() {
|
||
*v = rewrite(*v);
|
||
}
|
||
}
|
||
}
|
||
let global_ptr = self.session.global_object().as_ptr() as *mut JsObject;
|
||
if !global_ptr.is_null() {
|
||
// SAFETY: KernelSession 在 VM 生命周期内拥有 global_object。
|
||
unsafe {
|
||
(*global_ptr).rewrite_object_values(rewrite);
|
||
}
|
||
}
|
||
}
|
||
|
||
pub(crate) fn for_each_root(&self, f: impl FnMut(JsValue)) {
|
||
// 统一遍历：根收集与指针重写共用同一字段清单。
|
||
self.for_each_value(f);
|
||
}
|
||
|
||
pub(crate) fn maybe_collect_session_gc(&mut self) {
|
||
let mut session_gc = std::mem::take(&mut self.gc_state.session_gc);
|
||
session_gc.maybe_collect(self);
|
||
self.gc_state.session_gc = session_gc;
|
||
}
|
||
|
||
/// 执行期字符串阈值回收：仅回收 session 字符串（跳过对象搬移）。热路径只在
|
||
/// 超阈值后进入，`mem::take` 不承担每次分配的开销。
|
||
pub(crate) fn maybe_collect_session_strings(&mut self) {
|
||
let mut session_gc = std::mem::take(&mut self.gc_state.session_gc);
|
||
session_gc.maybe_collect_strings_only(self);
|
||
self.gc_state.session_gc = session_gc;
|
||
}
|
||
|
||
/// 执行期完整 GC（对象+字符串）的 dispatch 安全点入口：按水位判定触发。
|
||
/// 仅在 native_call_depth == 0 的指令边界调用——此时无 builtin 局部裸指针，
|
||
/// 对象搬移安全。预留给 17.3b（对象侧执行期触发）安全点审计后使用。
|
||
#[allow(dead_code)]
|
||
pub(crate) fn maybe_collect_session_gc_at_dispatch(&mut self) {
|
||
let mut session_gc = std::mem::take(&mut self.gc_state.session_gc);
|
||
session_gc.maybe_collect_gc(self);
|
||
self.gc_state.session_gc = session_gc;
|
||
}
|
||
|
||
/// 只读访问 session GC 的统计（回收次数、存活/死亡对象数、释放字节等）。
|
||
pub fn session_gc_stats(&self) -> &SessionGc {
|
||
&self.gc_state.session_gc
|
||
}
|
||
|
||
/// 当前 session arena 中存活（已晋升）的对象数量。
|
||
pub fn session_object_count(&self) -> usize {
|
||
self.gc_state.session_object_ptrs.len()
|
||
}
|
||
|
||
/// session 当前分配的字节数（对象 + 存活字符串）。
|
||
pub fn session_bytes_allocated(&self) -> usize {
|
||
self.gc_state.session_bytes_allocated
|
||
}
|
||
|
||
/// 执行期 session 堆账目的峰值高水位（顶层指令边界采样，全量重置清零）。
|
||
pub fn session_bytes_peak(&self) -> usize {
|
||
self.gc_state.session_bytes_peak
|
||
}
|
||
|
||
/// 无条件执行一次完整 session GC（mark + 移动式 sweep + 串/BigInt 清扫）。
|
||
///
|
||
/// # 副作用
|
||
/// - 存活对象复制进新 session arena，全部根与原生盒按转发表重写；
|
||
/// `session_bytes_allocated` 重置为清扫后的存活字节。
|
||
///
|
||
/// # 注意事项
|
||
/// - 须在执行外的安全点调用（无在途 builtin 局部裸指针、dispatch 未重入）；
|
||
/// 执行期触发仍走水位路径，本入口供事后观测（如基准测 workload 后留存堆）。
|
||
pub fn collect_session_gc(&mut self) {
|
||
let mut session_gc = std::mem::take(&mut self.gc_state.session_gc);
|
||
session_gc.collect(self);
|
||
self.gc_state.session_gc = session_gc;
|
||
}
|
||
|
||
/// 当前 epoch 中已分配并跟踪的对象数量（未晋升到 session 的临时对象）。
|
||
pub fn epoch_object_count(&self) -> usize {
|
||
self.gc_state.epoch_object_ptrs.len()
|
||
}
|
||
|
||
/// inline cache 命中率（0.0~1.0），用于观测 IC 预热效果。
|
||
pub fn ic_hit_rate(&self) -> f64 {
|
||
self.profiling.ic_hit_rate()
|
||
}
|
||
|
||
/// 累计执行的指令数（profiling）。
|
||
pub fn instruction_count(&self) -> u64 {
|
||
self.profiling.instruction_count
|
||
}
|
||
|
||
/// 全局 symbol 注册表中已注册的 key 数量。
|
||
pub fn symbol_registry_len(&self) -> usize {
|
||
self.symbols.registry_len()
|
||
}
|
||
|
||
/// inline cache 命中次数。
|
||
pub fn ic_hit_count(&self) -> u64 {
|
||
self.profiling.ic_hits.get()
|
||
}
|
||
|
||
/// inline cache 未命中次数。
|
||
pub fn ic_miss_count(&self) -> u64 {
|
||
self.profiling.ic_misses.get()
|
||
}
|
||
|
||
pub(crate) fn checked_object_ptr(
|
||
&mut self, val: JsValue, error_msg: &str,
|
||
) -> Result<Option<*mut JsObject>, String> {
|
||
if !val.is_object() {
|
||
self.raise_type_error(error_msg)?;
|
||
return Ok(None);
|
||
}
|
||
let ptr = (val.to_bits() & PTR_MASK) as *mut JsObject;
|
||
let addr = ptr as usize;
|
||
if ptr.is_null() || addr < 0x10000 || addr % std::mem::align_of::<JsObject>() != 0 {
|
||
self.raise_type_error(error_msg)?;
|
||
return Ok(None);
|
||
}
|
||
Ok(Some(ptr))
|
||
}
|
||
|
||
pub(crate) fn raise_error_kind(&mut self, kind: &'static str, msg: &str) -> Result<(), String> {
|
||
self.raise_js_error(JsError::new(js_error_kind(kind), msg))
|
||
}
|
||
|
||
pub(crate) fn raise_js_error(&mut self, err: JsError) -> Result<(), String> {
|
||
let kind = js_error_kind_name(err.kind);
|
||
vm_debug!("raise_js_error: {} \"{}\"", kind, err.message);
|
||
let error = oxide_builtins::error::create_kind_error(self, kind, &err.message);
|
||
self.exception_value = Some(error);
|
||
self.pending_error_kind = Some(kind);
|
||
self.unwind()
|
||
}
|
||
|
||
pub(crate) fn raise_type_error(&mut self, msg: &str) -> Result<(), String> {
|
||
self.raise_error_kind("TypeError", msg)
|
||
}
|
||
|
||
pub(crate) fn error_message_text(&self, kind: &str, msg: &str) -> String {
|
||
format_error_message(kind, msg)
|
||
}
|
||
|
||
/// 推进线性同余 RNG 一步（Math.random 用）。首次调用以系统时间纳秒播种。
|
||
pub fn step_rng(&mut self) {
|
||
if self.math_rng_state == 0 {
|
||
self.math_rng_state = std::time::SystemTime::now()
|
||
.duration_since(std::time::UNIX_EPOCH)
|
||
.unwrap_or_default()
|
||
.as_nanos() as u64;
|
||
vm_debug!("step_rng: seeded");
|
||
}
|
||
self.math_rng_state = self
|
||
.math_rng_state
|
||
.wrapping_mul(6364136223846793005)
|
||
.wrapping_add(1442695040888963407);
|
||
}
|
||
|
||
/// 读取当前 RNG 状态生成的 [0,1) 浮点数。
|
||
pub fn math_rng_value(&self) -> f64 {
|
||
(self.math_rng_state >> 33) as f64 / (1u64 << 31) as f64
|
||
}
|
||
|
||
/// 只读访问 VM 共享的 `KernelCore`。
|
||
pub fn kernel_core(&self) -> &Arc<KernelCore> {
|
||
&self.kernel_core
|
||
}
|
||
|
||
/// 只读访问当前 session（builtin world 与 global object）。
|
||
pub fn session(&self) -> &KernelSession {
|
||
&self.session
|
||
}
|
||
|
||
pub(crate) fn is_object_prototype(&self, ptr: *const JsObject) -> bool {
|
||
let proto_ptr = self.session.builtin_world().object_proto.as_ptr();
|
||
std::ptr::eq(ptr, proto_ptr)
|
||
}
|
||
|
||
/// 读取寄存器 `idx` 的值（`VmHost` 与 native 绑定的统一入口）。
|
||
pub fn reg(&self, idx: u8) -> JsValue {
|
||
self.regs[idx as usize]
|
||
}
|
||
|
||
/// 写入寄存器 `idx` 的值。
|
||
pub fn set_reg(&mut self, idx: u8, val: JsValue) {
|
||
self.regs[idx as usize] = val;
|
||
}
|
||
|
||
/// 只读访问 VM 的 epoch arena。
|
||
pub fn epoch(&self) -> &Epoch {
|
||
&self.epoch
|
||
}
|
||
|
||
/// 若 `val` 是字符串，返回其内容的 `String` 副本；否则返回 `None`。
|
||
pub fn lookup_str(&self, val: JsValue) -> Option<String> {
|
||
if !val.is_string() {
|
||
return None;
|
||
}
|
||
// SAFETY: val 是字符串值，其 JsString 指针在生命周期内有效。
|
||
Some(unsafe { (*val.as_string_ptr()).to_owned_string() })
|
||
}
|
||
|
||
pub(crate) fn thrown_error_kind(&self, val: JsValue) -> &'static str {
|
||
if !val.is_object() {
|
||
return "Error";
|
||
}
|
||
let name_si = self.kernel_core.perm_interner().intern("name").0;
|
||
let obj = unsafe { &*val.as_js_object_ptr() };
|
||
let Some(name_val) = self.resolve_property(obj, name_si) else {
|
||
return "Error";
|
||
};
|
||
let Some(name) = self.lookup_str(name_val) else {
|
||
return "Error";
|
||
};
|
||
match name.as_str() {
|
||
"TypeError" => "TypeError",
|
||
"ReferenceError" => "ReferenceError",
|
||
"RangeError" => "RangeError",
|
||
"SyntaxError" => "SyntaxError",
|
||
"URIError" => "URIError",
|
||
"EvalError" => "EvalError",
|
||
"Error" => "Error",
|
||
_ => "Error",
|
||
}
|
||
}
|
||
|
||
/// 把 `JsValue` 转为属性键 si（`u32`）。
|
||
///
|
||
/// 非负小整数（含整值 double）直接编码到整数键区间，免 to_string + intern；
|
||
/// 字符串中形如数组下标的规范数字串（`"5"`）映射到同一整数键，保证
|
||
/// `obj["5"]` 与 `obj[5]` 键等价。
|
||
///
|
||
/// # 边界与前提
|
||
/// - 索引超 `INT_KEY_COUNT`（2^30）时回退字符串键路径（intern + 反查仍正确）
|
||
/// - 负数与小数不进入整数键区间（`arr[-1]`/`arr[1.5]` 是普通字符串键）
|
||
pub(crate) fn property_key_si(&mut self, val: JsValue) -> Result<u32, String> {
|
||
if val.is_int() {
|
||
let i = val.as_int();
|
||
if i >= 0 && (i as u32) < INT_KEY_COUNT {
|
||
return Ok(make_int_key(i as u32));
|
||
}
|
||
} else if val.is_double() {
|
||
let d = val.as_double();
|
||
if d >= 0.0 && d.fract() == 0.0 && d < INT_KEY_COUNT as f64 {
|
||
return Ok(make_int_key(d as u32));
|
||
}
|
||
} else if val.is_string() {
|
||
// SAFETY: val 是字符串值，把其内容桥接为永久 key id（rope 经惰性扁平化）。
|
||
let s = unsafe { (*val.as_string_ptr()).as_str() };
|
||
if let Some(i) = canonical_index_of(s) {
|
||
return Ok(make_int_key(i));
|
||
}
|
||
return Ok(self.kernel_core.perm_interner().intern(s).0);
|
||
}
|
||
// Symbol 值直接编码为 Symbol 键（不进字符串 interner，键相互独立）。
|
||
if val.is_symbol() {
|
||
return Ok(make_symbol_key(val.as_symbol_index()));
|
||
}
|
||
// well-known symbol 是空对象：按指针比对映射到各自的 well-known Symbol 键，
|
||
// 避免全部塌缩成同一个键。
|
||
if val.is_object() {
|
||
if let Some(id) = oxide_runtime_api::well_known_symbol_id(self, val.as_js_object_ptr()) {
|
||
return Ok(make_well_known_symbol_key(id));
|
||
}
|
||
// ToPropertyKey：对象经 ToPrimitive(string hint)，结果为 Symbol 时直接作键；
|
||
// 其余字符串经规范化（规范数字串映射整数键）与字符串分支统一口径。
|
||
let prim = coercion::to_primitive(val, coercion::ToPrimitiveHint::String, self)?;
|
||
if prim.is_symbol() {
|
||
return Ok(make_symbol_key(prim.as_symbol_index()));
|
||
}
|
||
let key = coercion::to_string(prim);
|
||
return Ok(oxide_runtime_api::VmHost::string_key_si(self, &key));
|
||
}
|
||
// 其它原始值（BigInt 等）：ToPropertyKey 一律转字符串并走规范化，避免与
|
||
// 数字键区间分裂（`o[5n]` 与 `o["5"]`/`o[5]` 必须同键）。
|
||
let key = coercion::to_string(val);
|
||
Ok(oxide_runtime_api::VmHost::string_key_si(self, &key))
|
||
}
|
||
|
||
pub(crate) fn array_index_from_property_key(&self, prop_name_si: u32) -> Option<u32> {
|
||
if is_int_key(prop_name_si) {
|
||
return Some(int_key_value(prop_name_si));
|
||
}
|
||
let key = self.kernel_core.perm_interner().lookup(prop_name_si)?;
|
||
if key.is_empty() || (key.len() > 1 && key.starts_with('0')) {
|
||
return None;
|
||
}
|
||
key.parse::<u32>().ok()
|
||
}
|
||
|
||
pub(crate) fn resolve_property(&self, obj: &JsObject, prop_name_si: u32) -> Option<JsValue> {
|
||
vm_trace!("resolve_property: shape_id={} prop_name_si={}", obj.shape_id(), prop_name_si);
|
||
let length_si = self.length_si;
|
||
if obj.is_array() && prop_name_si == length_si {
|
||
return Some(obj.logical_len_value());
|
||
}
|
||
if obj.is_array() {
|
||
if let Some(index) = self.array_index_from_property_key(prop_name_si) {
|
||
// 数组元素区：hole（删除标记）视为不存在。
|
||
if index < obj.array_prop_count && !obj.prop_meta_at(index).is_some_and(|m| m.is_hole()) {
|
||
return Some(obj.get_prop_at(index));
|
||
}
|
||
}
|
||
}
|
||
if let Some(pos) = self.kernel_core.shape_forge().lookup_position(obj.shape_id(), prop_name_si) {
|
||
let val = obj.get_prop_at(pos);
|
||
if !val.is_undefined() || obj.prop_vec_len() > pos as usize {
|
||
return Some(val);
|
||
}
|
||
}
|
||
let mut proto = obj.proto();
|
||
let mut depth = 0usize;
|
||
while proto.is_object() && depth < MAX_PROTO_CHAIN_DEPTH {
|
||
depth += 1;
|
||
let proto_obj = unsafe { &*proto.as_js_object_ptr() };
|
||
if let Some(pos) = self
|
||
.kernel_core
|
||
.shape_forge()
|
||
.lookup_position(proto_obj.shape_id(), prop_name_si)
|
||
{
|
||
let val = proto_obj.get_prop_at(pos);
|
||
if !val.is_undefined() || proto_obj.prop_vec_len() > pos as usize {
|
||
return Some(val);
|
||
}
|
||
}
|
||
proto = proto_obj.proto();
|
||
}
|
||
None
|
||
}
|
||
|
||
pub(crate) fn get_own_property_slot(&self, obj: &JsObject, prop_name_si: u32) -> Option<u32> {
|
||
let length_si = self.length_si;
|
||
if obj.is_array() && prop_name_si == length_si {
|
||
return None;
|
||
}
|
||
if obj.is_array() {
|
||
if let Some(index) = self.array_index_from_property_key(prop_name_si) {
|
||
// 数组元素区：hole（删除标记）视为不存在。
|
||
if index < obj.array_prop_count && !obj.prop_meta_at(index).is_some_and(|m| m.is_hole()) {
|
||
return Some(index);
|
||
}
|
||
}
|
||
}
|
||
self.kernel_core
|
||
.shape_forge()
|
||
.lookup_position(obj.shape_id(), prop_name_si)
|
||
.and_then(|pos| {
|
||
if obj.is_array() {
|
||
// 数组属性存储索引 = array_prop_count + shape 槽位（与元素区分）。
|
||
let idx = obj.array_prop_count as usize + pos as usize;
|
||
let val = obj.get_prop_at(idx);
|
||
if !val.is_undefined() || obj.prop_vec_len() > idx {
|
||
Some(idx as u32)
|
||
} else {
|
||
None
|
||
}
|
||
} else {
|
||
let val = obj.get_prop_at(pos);
|
||
if !val.is_undefined() || obj.prop_vec_len() > pos as usize {
|
||
Some(pos)
|
||
} else {
|
||
None
|
||
}
|
||
}
|
||
})
|
||
}
|
||
|
||
pub(crate) fn call_function_sync(
|
||
&mut self, callee: JsValue, receiver: JsValue, args: &[JsValue],
|
||
) -> Result<JsValue, String> {
|
||
vm_debug!("call_function_sync: args={} callee_is_object={}", args.len(), callee.is_object());
|
||
if !callee.is_object() {
|
||
return Err(self.error_message_text("TypeError", "accessor is not callable"));
|
||
}
|
||
let callee_obj = unsafe { &*callee.as_js_object_ptr() };
|
||
if !callee_obj.is_function() {
|
||
return Err(self.error_message_text("TypeError", "accessor is not callable"));
|
||
}
|
||
|
||
if let Some(native_fn) = callee_obj.native_fn() {
|
||
if self.native_call_depth >= self.kernel_core.config.max_call_depth {
|
||
self.raise_error_kind("RangeError", "Maximum call stack size exceeded")?;
|
||
return Ok(JsValue::undefined());
|
||
}
|
||
// 大实参集（超过寄存器窗口）：窗口外的实参转存 spill 栈溢出区（GC 根），
|
||
// native 侧经 native_arg_count/native_arg_at 读取；窗口内仍按寄存器
|
||
// 协议打包，保证未迁移的 builtin 行为不变。
|
||
let overflow_base = self.spill_stack.len();
|
||
let saved_overflow_base = self.native_overflow_base;
|
||
let saved_overflow_count = self.native_overflow_count;
|
||
if args.len() > Self::SYNC_NATIVE_ARG_LIMIT {
|
||
self.spill_stack.extend_from_slice(&args[Self::SYNC_NATIVE_ARG_LIMIT..]);
|
||
self.native_overflow_base = overflow_base;
|
||
self.native_overflow_count = args.len() - Self::SYNC_NATIVE_ARG_LIMIT;
|
||
}
|
||
// native 回调只写 regs[0..args.len()] 实参区 + regs[253]/[254]（receiver/callee），
|
||
// 窗口 = 调用方活动寄存器 ∪ 实参写入区；窗口外槽回调不触碰，无需保存。
|
||
let window = (self.active_reg_limit as usize).max(args.len() + 3).min(253);
|
||
let mut saved_window = self.inline_reg_pool.take().unwrap_or_default();
|
||
saved_window.clear();
|
||
saved_window.extend_from_slice(&self.regs[..window]);
|
||
let saved_r253 = self.regs[253];
|
||
let saved_r254 = self.regs[254];
|
||
let pack_limit = args.len().min(Self::SYNC_NATIVE_ARG_LIMIT);
|
||
let arg_regs = self.pack_sync_native_call_args(receiver, callee, &args[..pack_limit]);
|
||
// SAFETY: native_fn 经 set_native_fn 以合法 NativeFn 指针设置；
|
||
// native_fn_ptr_to_fn 是 NativeFnPtr → NativeFn 的唯一强制转换点。
|
||
let func: NativeFn = unsafe { native_fn_ptr_to_fn(native_fn) };
|
||
self.native_call_depth += 1;
|
||
let result = func(self, &arg_regs);
|
||
self.native_call_depth -= 1;
|
||
// 溢出区随本次调用结束截断回收，并还原外层的溢出区描述（嵌套调用安全）。
|
||
if args.len() > Self::SYNC_NATIVE_ARG_LIMIT {
|
||
self.spill_stack.truncate(overflow_base);
|
||
}
|
||
self.native_overflow_base = saved_overflow_base;
|
||
self.native_overflow_count = saved_overflow_count;
|
||
// 窗口回拷 + regs[253]/[254] 单回，缓冲归还池复用。
|
||
self.regs[..window].copy_from_slice(&saved_window);
|
||
self.regs[253] = saved_r253;
|
||
self.regs[254] = saved_r254;
|
||
self.inline_reg_pool = Some(saved_window);
|
||
return match result {
|
||
NativeResult::Ok(val) => Ok(val),
|
||
NativeResult::Err(err) => {
|
||
self.last_uncaught_value = Some(err);
|
||
Err(self.error_text(err))
|
||
}
|
||
NativeResult::TailCall { callee, this, args } => self.call_function_sync(callee, this, &args),
|
||
};
|
||
}
|
||
|
||
// 字节码函数在自身（同一 epoch）内联执行，防止 use-after-free。
|
||
// 独立子 VM 拥有不同 epoch：返回含子 VM epoch 指针的 JsValue 后再销毁子 VM，
|
||
// 会在 release 构建中产生悬垂指针 / 访问违规。
|
||
self.call_bytecode_function_inline(callee, callee_obj, receiver, args)
|
||
}
|
||
|
||
/// 压帧窗口上界：调用方活动寄存器与调用点存活上界取 min。
|
||
///
|
||
/// # 边界与前提
|
||
/// - `call_window` 为 CALL ext 高 8 位编码的存活上界；0 = 未编码（回退全量）。
|
||
/// - 窗口至少为 1（reg 0 恒为调用结果槽）。
|
||
pub(crate) fn call_window_limit(&self, caller_active_reg_limit: u8, call_window: u8) -> u8 {
|
||
if call_window == 0 {
|
||
caller_active_reg_limit
|
||
} else {
|
||
caller_active_reg_limit.min(call_window)
|
||
}
|
||
.max(1)
|
||
}
|
||
|
||
/// 当前执行上下文的严格模式标志：属性写失败路径据此分派（严格抛
|
||
/// TypeError，sloppy 静默 no-op）。
|
||
///
|
||
/// # 边界与前提
|
||
/// - inline 执行期间帧表可能非空（调用方帧隔离在外），须以
|
||
/// `inline_frames_base` 为基线区分"inline 前已有帧"与"inline 内新压帧"
|
||
/// （CALL/accessor 帧严格性归目标函数，最内层执行上下文即帧栈顶）。
|
||
/// - 无帧且无 inline 时为顶层脚本执行，取 `top_level_strict`。
|
||
pub(crate) fn current_strict(&self) -> bool {
|
||
if self.inline_callee.is_some() {
|
||
if self.frames.len() > self.inline_frames_base {
|
||
return self.frames.last().unwrap().strict;
|
||
}
|
||
return self.inline_strict;
|
||
}
|
||
if let Some(frame) = self.frames.last() {
|
||
return frame.strict;
|
||
}
|
||
self.top_level_strict
|
||
}
|
||
|
||
#[expect(clippy::too_many_arguments)]
|
||
pub(crate) fn push_bytecode_frame(
|
||
&mut self, callee: JsValue, this_value: JsValue, args: FrameArgs, construct_result_reg: Option<u8>,
|
||
constructed_this: Option<JsValue>, new_target: JsValue, continuation: FrameContinuation, call_window: u8,
|
||
) -> Result<(), String> {
|
||
vm_trace!(
|
||
"push_bytecode_frame: depth={}, args={}, continuation={:?}",
|
||
self.frames.len(),
|
||
args.len(),
|
||
continuation
|
||
);
|
||
if !callee.is_object() {
|
||
return Err(self.error_message_text("TypeError", "CALL target is not callable"));
|
||
}
|
||
let obj = unsafe { &*callee.as_js_object_ptr() };
|
||
if !obj.is_function() || obj.sub_module_index() == 0 {
|
||
return Err(self.error_message_text("TypeError", "CALL target is not callable"));
|
||
}
|
||
let sub_idx = obj.sub_module_index() as usize;
|
||
if sub_idx >= self.sub_modules.len() {
|
||
return Err(format!(
|
||
"CALL: sub_module_index {} out of bounds (max {})",
|
||
sub_idx,
|
||
self.sub_modules.len()
|
||
));
|
||
}
|
||
if self.frames.len() >= self.kernel_core.config.max_call_depth {
|
||
return self.raise_error_kind("RangeError", "Maximum call stack size exceeded");
|
||
}
|
||
|
||
let sub_bytecode = Arc::clone(&self.sub_modules[sub_idx].bytecode);
|
||
let sub_n_args = self.sub_modules[sub_idx].n_args as usize;
|
||
let sub_n_registers = self.sub_modules[sub_idx].n_registers;
|
||
let sub_param_base = self.sub_modules[sub_idx].param_base as usize;
|
||
let sub_is_arrow = self.sub_modules[sub_idx].is_arrow;
|
||
let sub_is_strict = self.sub_modules[sub_idx].is_strict;
|
||
// 窗口 = min(调用方活动寄存器, 存活上界)；call_window=0 表示调用方全量
|
||
// （运行时发起路径 / 未编码的旧模块）。恢复按窗口回拷，active_reg_limit
|
||
// 仍还原为调用方真实值（caller_active_reg_limit）。
|
||
let caller_active_reg_limit = self.active_reg_limit.max(1);
|
||
let caller_reg_limit = self.call_window_limit(caller_active_reg_limit, call_window);
|
||
let saved_reg_offset = self.save_stack.len() as u32;
|
||
self.save_stack.extend_from_slice(&self.regs[..caller_reg_limit as usize]);
|
||
let saved_this = self.regs[254];
|
||
let saved_new_target = self.regs[255];
|
||
|
||
// 完整实参先写入 spill 栈实参区（在帧的 spill 区之前）：CREATE_ARGUMENTS 据此
|
||
// 构建 arguments 对象，帧恢复时随 spill 区截断一起丢弃。spill 在前、形参在后，
|
||
// 且形参源改读 spill 区——实参源区间与形参写入区在共享寄存器文件内重叠时
|
||
// 不会先写后读串值（nested callee identity 高位 param_base 可落入实参区间）。
|
||
let args_base = self.spill_stack.len() as u32;
|
||
match args {
|
||
FrameArgs::Slice(s) => self.spill_stack.extend_from_slice(s),
|
||
FrameArgs::RegRange { first, count } => {
|
||
for i in 0..count {
|
||
self.spill_stack.push(self.regs[first.wrapping_add(i as u8) as usize]);
|
||
}
|
||
}
|
||
}
|
||
let args_count = args.len().min(u16::MAX as usize) as u16;
|
||
|
||
// 形参拷贝：源为 spill 实参区（与调用方寄存器隔离），实参不足补 undefined。
|
||
for i in 0..sub_n_args {
|
||
let v = if i < args_count as usize {
|
||
self.spill_stack[args_base as usize + i]
|
||
} else {
|
||
JsValue::undefined()
|
||
};
|
||
self.regs[sub_param_base + i] = v;
|
||
}
|
||
// this 绑定：箭头函数恒用词法捕获；sloppy 普通函数 this 为 null/undefined 时
|
||
// 替换为全局对象（ECMA-262 10.4.3）；严格模式与显式方法/构造 this 原样保留。
|
||
self.regs[254] = if sub_is_arrow {
|
||
obj.captured_this()
|
||
} else if !sub_is_strict && this_value.is_nullish() {
|
||
JsValue::from_js_object(self.session.global_object().as_ptr() as *mut JsObject)
|
||
} else {
|
||
this_value
|
||
};
|
||
self.regs[255] = new_target;
|
||
|
||
self.saved_bytecode_stack.push(std::mem::take(&mut self.bytecode));
|
||
self.saved_immutables_stack.push(self.active_immutables);
|
||
// 记录调用方 flat_id，进入被调模块（标签模板 site 缓存按模块隔离）。
|
||
self.saved_flat_id_stack.push(self.active_flat_id);
|
||
self.active_flat_id = sub_idx as u32;
|
||
|
||
let function_name = self.sub_modules[sub_idx]
|
||
.function_name
|
||
.as_deref()
|
||
.map(|name| self.kernel_core.perm_interner().intern(name).0)
|
||
.unwrap_or(0);
|
||
|
||
self.frames.push(CallFrame {
|
||
return_addr: self.pc,
|
||
function_name,
|
||
caller_reg_limit,
|
||
caller_active_reg_limit,
|
||
saved_reg_offset,
|
||
spill_offset: self.spill_stack.len() as u32,
|
||
arguments_base: args_base,
|
||
arguments_count: args_count,
|
||
saved_this,
|
||
saved_new_target,
|
||
callee,
|
||
construct_result_reg,
|
||
constructed_this,
|
||
is_derived_constructor: obj.is_derived_constructor(),
|
||
super_called: false,
|
||
strict: sub_is_strict,
|
||
continuation,
|
||
});
|
||
|
||
self.pc = 0;
|
||
self.bytecode = sub_bytecode;
|
||
let subs = Arc::clone(&self.sub_modules);
|
||
self.activate_immutables(sub_idx, &subs[sub_idx].constants);
|
||
self.cell_stack.push(Vec::with_capacity(subs[sub_idx].cells_needed as usize));
|
||
for (name, reg) in &self.sub_modules[sub_idx].builtin_reg_map.clone() {
|
||
let si = self.kernel_core.perm_interner().intern(name.as_str()).0;
|
||
let global = self.session.global_object();
|
||
if let Some(pos) = self.kernel_core.shape_forge().lookup_position(global.shape_id(), si) {
|
||
self.regs[*reg as usize] = global.get_prop_at(pos);
|
||
} else {
|
||
vm_debug!(
|
||
"push_frame: builtin '{}' reg={} NOT on global object (stays {})",
|
||
name,
|
||
reg,
|
||
self.regs[*reg as usize]
|
||
);
|
||
}
|
||
}
|
||
|
||
self.active_reg_limit = sub_n_registers.max(1);
|
||
self.pc = 0;
|
||
Ok(())
|
||
}
|
||
|
||
pub(crate) fn dispatch(&mut self) -> Result<JsValue, String> {
|
||
// config.max_steps 逐指令只读且循环内不变：提到循环外，免每次经 kernel_core
|
||
// Arc 指针追寻读取（热点内唯一的 config 访问）。
|
||
let max_steps = self.kernel_core.config.max_steps;
|
||
let mut steps: u64 = 0;
|
||
loop {
|
||
steps += 1;
|
||
// 执行期 GC 安全点：仅在顶层 dispatch（native_call_depth == 0）
|
||
// 的指令边界触发——嵌套 dispatch（builtin 经 call_function_sync 重入
|
||
// 执行 JS 回调、generator/async 恢复）期间，调用方寄存器窗口副本存于
|
||
// inline 状态（非 GC 根），此时回收会把调用方 regs 中的活值当死值释放。
|
||
// 返回顶层后检查恢复，存活值此时已回拷为执行根。账目未超水位时仅
|
||
// 少量字段比较。
|
||
if self.native_call_depth == 0 {
|
||
// 峰值高水位：同一边界采样 session 堆账目上界
|
||
let bytes = self.gc_state.session_bytes_allocated;
|
||
if bytes > self.gc_state.session_bytes_peak {
|
||
self.gc_state.session_bytes_peak = bytes;
|
||
}
|
||
if bytes >= self.gc_state.string_gc_watermark {
|
||
self.maybe_collect_session_strings();
|
||
}
|
||
}
|
||
if let Some(max_steps) = max_steps {
|
||
if steps > max_steps {
|
||
vm_warn!("dispatch: step limit {} exceeded at pc={}", max_steps, self.pc);
|
||
self.profiling.set_instruction_count(steps);
|
||
return Err(format!("VM step limit exceeded at pc={}", self.pc));
|
||
}
|
||
}
|
||
if self.pc >= self.bytecode.len() {
|
||
let tail: Vec<String> = self
|
||
.bytecode
|
||
.iter()
|
||
.enumerate()
|
||
.rev()
|
||
.take(5)
|
||
.map(|(i, &instr)| format!("{i}:{:?}", opcode::opcode(instr)))
|
||
.collect();
|
||
let fn_names: Vec<String> = self
|
||
.frames
|
||
.iter()
|
||
.map(|f| {
|
||
self.kernel_core
|
||
.perm_interner()
|
||
.lookup(f.function_name)
|
||
.map(|s| s.to_string())
|
||
.unwrap_or_else(|| "?".into())
|
||
})
|
||
.collect();
|
||
vm_error!(
|
||
"dispatch: program counter out of bounds pc={} len={} frames={} cell_stack={} tail={:?} fns={:?}",
|
||
self.pc,
|
||
self.bytecode.len(),
|
||
self.frames.len(),
|
||
self.cell_stack.len(),
|
||
tail,
|
||
fn_names
|
||
);
|
||
vm_error!("dispatch: program counter out of bounds pc={} len={}", self.pc, self.bytecode.len());
|
||
self.profiling.instruction_count = steps;
|
||
return Err("program counter out of bounds".into());
|
||
}
|
||
|
||
let instr = self.bytecode[self.pc];
|
||
let op = opcode::opcode(instr);
|
||
let rd = opcode::rd(instr) as usize;
|
||
let a = opcode::a(instr) as usize;
|
||
let b = opcode::b(instr) as usize;
|
||
self.pc += 1;
|
||
|
||
match op {
|
||
OpCode::NOP => {}
|
||
|
||
OpCode::HALT => {
|
||
vm_trace!("HALT: regs[0]={:?}", self.regs[0]);
|
||
self.profiling.set_instruction_count(steps);
|
||
return Ok(self.regs[0]);
|
||
}
|
||
|
||
OpCode::LOAD_CONST => {
|
||
self.dispatch_load_const(rd, instr)?;
|
||
}
|
||
|
||
OpCode::LOAD_GLOBAL => match self.dispatch_load_global(rd, instr) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::LOAD_GLOBAL_TYPEOF => {
|
||
self.dispatch_load_global_typeof(rd, instr)?;
|
||
}
|
||
|
||
OpCode::CREATE_CLOSURE => {
|
||
self.dispatch_create_closure(rd, instr)?;
|
||
}
|
||
OpCode::MAKE_CELL => {
|
||
self.dispatch_make_cell(rd, instr)?;
|
||
}
|
||
OpCode::MAKE_CELL_FRESH => {
|
||
self.dispatch_make_cell_fresh(rd, instr)?;
|
||
}
|
||
OpCode::CELL_GET => {
|
||
self.dispatch_cell_get(rd, a, b)?;
|
||
}
|
||
OpCode::CELL_SET => {
|
||
self.dispatch_cell_set(a, b)?;
|
||
}
|
||
OpCode::LOAD_UPVALUE => {
|
||
self.dispatch_load_upvalue(rd, instr)?;
|
||
}
|
||
OpCode::STORE_UPVALUE => {
|
||
self.dispatch_store_upvalue(rd, a, b)?;
|
||
}
|
||
OpCode::CREATE_REGEXP => match self.dispatch_create_regexp(rd, a, b) {
|
||
Ok(Some(result)) => return Ok(result),
|
||
Ok(None) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::ADD => {
|
||
self.dispatch_add(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::CONCAT_N => {
|
||
self.dispatch_concat_n(rd, a)?;
|
||
}
|
||
|
||
OpCode::SUB => {
|
||
binary_arith!(self, a, b, rd, -, false);
|
||
}
|
||
|
||
OpCode::MUL => {
|
||
binary_arith!(self, a, b, rd, *, false);
|
||
}
|
||
|
||
OpCode::DIV => {
|
||
binary_arith!(self, a, b, rd, /, true);
|
||
}
|
||
|
||
OpCode::MOD => {
|
||
binary_arith!(self, a, b, rd, %, true);
|
||
}
|
||
|
||
OpCode::EXP => {
|
||
self.dispatch_exp(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::NEG => {
|
||
self.dispatch_neg(rd, a)?;
|
||
}
|
||
|
||
OpCode::BIT_AND => {
|
||
self.dispatch_bit_and(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::BIT_OR => {
|
||
self.dispatch_bit_or(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::BIT_XOR => {
|
||
self.dispatch_bit_xor(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::SHL => {
|
||
self.dispatch_shl(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::SHR => {
|
||
self.dispatch_shr(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::USHR => {
|
||
self.dispatch_ushr(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::BIT_NOT => {
|
||
self.dispatch_bit_not(rd, a)?;
|
||
}
|
||
|
||
OpCode::EQ => {
|
||
self.dispatch_eq(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::NEQ => {
|
||
self.dispatch_neq(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::LT => {
|
||
self.dispatch_lt(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::GT => {
|
||
self.dispatch_gt(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::LTE => {
|
||
self.dispatch_lte(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::GTE => {
|
||
self.dispatch_gte(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::STRICT_EQ => {
|
||
self.dispatch_strict_eq(rd, a, b);
|
||
}
|
||
|
||
OpCode::STRICT_NEQ => {
|
||
self.dispatch_strict_neq(rd, a, b);
|
||
}
|
||
|
||
OpCode::UNARY_PLUS => {
|
||
self.dispatch_unary_plus(rd, a)?;
|
||
}
|
||
|
||
OpCode::JMP => {
|
||
self.dispatch_jmp(instr);
|
||
}
|
||
|
||
OpCode::BREAK => {
|
||
self.dispatch_break(instr)?;
|
||
}
|
||
|
||
OpCode::CONTINUE => {
|
||
self.dispatch_continue(instr)?;
|
||
}
|
||
|
||
OpCode::JMP_IF_FALSE => {
|
||
self.dispatch_jmp_if_false(rd, instr);
|
||
}
|
||
|
||
OpCode::JMP_IF_TRUE => {
|
||
self.dispatch_jmp_if_true(rd, instr);
|
||
}
|
||
|
||
OpCode::JMP_IF_NULLISH => {
|
||
self.dispatch_jmp_if_nullish(rd, instr);
|
||
}
|
||
|
||
OpCode::LOAD_VAR => match self.dispatch_load_var(rd, a) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::STORE_VAR => match self.dispatch_store_var(rd, a, b) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::MOV => {
|
||
vm_trace!("MOV r{} = r{}", rd, a);
|
||
self.regs[rd] = self.regs[a];
|
||
}
|
||
|
||
OpCode::SPILL => {
|
||
self.dispatch_spill(rd)?;
|
||
}
|
||
|
||
OpCode::UNSPILL => {
|
||
self.dispatch_unspill(rd)?;
|
||
}
|
||
|
||
OpCode::CALL => match self.dispatch_call(rd, a, b) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::CALL_NATIVE => {
|
||
self.dispatch_call_native(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::CALL_SPREAD => match self.dispatch_call_spread(rd, a, b) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::NEW_EXPRESSION => match self.dispatch_new_expression(rd, a, b) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::NEW_EXPRESSION_SPREAD => match self.dispatch_new_expression_spread(rd, a, b) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::SUPER_CALL => match self.dispatch_super_call(rd, a) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::SUPER_CALL_SPREAD => match self.dispatch_super_call_spread(rd, a) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::SUPER_GET_PROP | OpCode::SUPER_STATIC_GET_PROP => {
|
||
match self.dispatch_super_get_prop(rd, a, b) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
}
|
||
}
|
||
|
||
OpCode::SET_HOME_OBJECT => match self.dispatch_set_home_object(rd, a) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::DEFINE_ACCESSOR => {
|
||
self.dispatch_define_accessor(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::DEFINE_ACCESSOR_DYNAMIC => {
|
||
self.dispatch_define_accessor_dynamic(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::DEFINE_PROP => {
|
||
self.dispatch_define_prop(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::DEFINE_GLOBAL_PROP => {
|
||
self.dispatch_define_global_prop(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::DEFINE_GLOBAL_PROP_C => {
|
||
let key_idx = self.bytecode[self.pc] as u16;
|
||
self.pc += 1;
|
||
self.dispatch_define_global_prop_c(a, key_idx)?;
|
||
}
|
||
|
||
OpCode::DEFINE_PROP_ATTRS => {
|
||
let attrs = self.bytecode[self.pc] as u8;
|
||
self.pc += 1;
|
||
self.dispatch_define_prop_attrs(rd, a, b, attrs)?;
|
||
}
|
||
|
||
OpCode::DEFINE_ACCESSOR_ATTRS => {
|
||
let key_word = self.bytecode[self.pc];
|
||
let attrs = self.bytecode[self.pc + 1] as u8;
|
||
self.pc += 2;
|
||
self.dispatch_define_accessor_attrs(rd, a, b, key_word, attrs)?;
|
||
}
|
||
|
||
OpCode::RETURN => match self.dispatch_return(instr) {
|
||
Ok(Some(result)) => return Ok(result),
|
||
Ok(None) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::IC_GET_PROP
|
||
| OpCode::IC_SET_PROP
|
||
| OpCode::GET_PROP
|
||
| OpCode::SET_PROP
|
||
| OpCode::SET_PROP_BATCH
|
||
| OpCode::GET_PROP_DYNAMIC
|
||
| OpCode::SET_PROP_DYNAMIC
|
||
| OpCode::SET_ELEM
|
||
| OpCode::GET_PRIVATE
|
||
| OpCode::SET_PRIVATE
|
||
| OpCode::INIT_PRIVATE
|
||
| OpCode::PRIVATE_BRAND_IN => {
|
||
self.dispatch_property_op(op, rd, a, b)?;
|
||
}
|
||
|
||
OpCode::NEW_OBJECT => {
|
||
self.dispatch_new_object(rd, instr)?;
|
||
}
|
||
|
||
OpCode::CREATE_ARGUMENTS => {
|
||
self.dispatch_create_arguments(rd)?;
|
||
}
|
||
|
||
OpCode::CREATE_REST_ARRAY => {
|
||
let fixed_count = opcode::b(instr) as usize;
|
||
self.dispatch_create_rest_array(rd, fixed_count)?;
|
||
}
|
||
|
||
OpCode::NEW_ARRAY => {
|
||
self.dispatch_new_array(rd, instr);
|
||
}
|
||
|
||
OpCode::COMPOUND_ADD => {
|
||
self.dispatch_compound_add(rd, a)?;
|
||
}
|
||
|
||
OpCode::COMPOUND_SUB => {
|
||
self.dispatch_compound_sub(rd, a)?;
|
||
}
|
||
|
||
OpCode::COMPOUND_MUL => {
|
||
self.dispatch_compound_mul(rd, a)?;
|
||
}
|
||
|
||
OpCode::COMPOUND_DIV => {
|
||
self.dispatch_compound_div(rd, a)?;
|
||
}
|
||
|
||
OpCode::COMPOUND_MOD => {
|
||
self.dispatch_compound_mod(rd, a)?;
|
||
}
|
||
|
||
OpCode::COMPOUND_EXP => {
|
||
self.dispatch_compound_exp(rd, a)?;
|
||
}
|
||
|
||
OpCode::COMPOUND_AND => {
|
||
self.dispatch_compound_bit_and(rd, a)?;
|
||
}
|
||
|
||
OpCode::COMPOUND_OR => {
|
||
self.dispatch_compound_bit_or(rd, a)?;
|
||
}
|
||
|
||
OpCode::COMPOUND_XOR => {
|
||
self.dispatch_compound_bit_xor(rd, a)?;
|
||
}
|
||
|
||
OpCode::COMPOUND_SHL => {
|
||
self.dispatch_compound_shl(rd, a)?;
|
||
}
|
||
|
||
OpCode::COMPOUND_SHR => {
|
||
self.dispatch_compound_shr(rd, a)?;
|
||
}
|
||
|
||
OpCode::COMPOUND_USHR => {
|
||
self.dispatch_compound_ushr(rd, a)?;
|
||
}
|
||
|
||
OpCode::TYPEOF => {
|
||
self.dispatch_typeof(rd, a);
|
||
}
|
||
|
||
OpCode::TO_OBJECT => {
|
||
self.dispatch_to_object(rd)?;
|
||
}
|
||
|
||
OpCode::VOID => {
|
||
self.dispatch_void(rd);
|
||
}
|
||
|
||
OpCode::TEMPLATE_STR => {
|
||
self.dispatch_template_str(rd)?;
|
||
}
|
||
|
||
OpCode::GET_TEMPLATE_OBJECT => {
|
||
self.dispatch_get_template_object(rd)?;
|
||
}
|
||
|
||
OpCode::DELETE_PROP_STATIC => match self.dispatch_delete_prop_static(rd) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::DELETE_PROP_DYNAMIC => match self.dispatch_delete_prop_dynamic(rd, b) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::INSTANCEOF => {
|
||
self.dispatch_instanceof(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::IN => {
|
||
self.dispatch_in(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::NOT => {
|
||
self.dispatch_not(rd, a);
|
||
}
|
||
|
||
OpCode::AND => {
|
||
self.dispatch_and(rd, a, b);
|
||
}
|
||
|
||
OpCode::OR => {
|
||
self.dispatch_or(rd, a, b);
|
||
}
|
||
|
||
OpCode::NULLISH => {
|
||
self.dispatch_nullish(rd, a, b);
|
||
}
|
||
|
||
OpCode::INC_PRE => {
|
||
self.dispatch_inc_pre(rd, a)?;
|
||
}
|
||
|
||
OpCode::INC_POST => {
|
||
self.dispatch_inc_post(rd, a)?;
|
||
}
|
||
|
||
OpCode::DEC_PRE => {
|
||
self.dispatch_dec_pre(rd, a)?;
|
||
}
|
||
|
||
OpCode::DEC_POST => {
|
||
self.dispatch_dec_post(rd, a)?;
|
||
}
|
||
|
||
OpCode::MEMBER_INC
|
||
| OpCode::MEMBER_DEC
|
||
| OpCode::DYN_MEMBER_INC
|
||
| OpCode::DYN_MEMBER_DEC
|
||
| OpCode::COMPOUND_MEMBER_ADD
|
||
| OpCode::COMPOUND_MEMBER_SUB
|
||
| OpCode::COMPOUND_MEMBER_MUL
|
||
| OpCode::COMPOUND_MEMBER_DIV
|
||
| OpCode::COMPOUND_MEMBER_MOD
|
||
| OpCode::COMPOUND_MEMBER_EXP
|
||
| OpCode::COMPOUND_MEMBER_BIT_AND
|
||
| OpCode::COMPOUND_MEMBER_BIT_OR
|
||
| OpCode::COMPOUND_MEMBER_BIT_XOR
|
||
| OpCode::COMPOUND_MEMBER_SHL
|
||
| OpCode::COMPOUND_MEMBER_SHR
|
||
| OpCode::COMPOUND_MEMBER_USHR => {
|
||
self.dispatch_member_op(op, rd, a, b)?;
|
||
}
|
||
|
||
OpCode::FOR_IN_INIT => {
|
||
self.dispatch_for_in_init(a)?;
|
||
}
|
||
|
||
OpCode::FOR_IN_NEXT => {
|
||
self.dispatch_for_in_next(rd)?;
|
||
}
|
||
|
||
OpCode::FOR_IN_DONE => {
|
||
self.dispatch_for_in_done(rd);
|
||
}
|
||
|
||
OpCode::FOR_IN_CLEANUP => {
|
||
self.dispatch_for_in_cleanup();
|
||
}
|
||
|
||
OpCode::FOR_OF_INIT => {
|
||
self.dispatch_for_of_init(a)?;
|
||
}
|
||
|
||
OpCode::FOR_OF_NEXT => {
|
||
self.dispatch_for_of_next(rd)?;
|
||
}
|
||
|
||
OpCode::FOR_OF_DONE => {
|
||
self.dispatch_for_of_done(rd)?;
|
||
}
|
||
|
||
OpCode::FOR_OF_CLOSE => {
|
||
self.dispatch_for_of_close()?;
|
||
}
|
||
|
||
OpCode::FOR_AWAIT_OF_INIT => {
|
||
self.dispatch_for_await_of_init(a)?;
|
||
}
|
||
|
||
OpCode::FOR_AWAIT_OF_NEXT => {
|
||
self.dispatch_for_await_of_next(rd)?;
|
||
}
|
||
|
||
OpCode::FOR_AWAIT_OF_DONE => {
|
||
self.dispatch_for_await_of_done(rd, a)?;
|
||
}
|
||
|
||
OpCode::FOR_AWAIT_OF_CLOSE => {
|
||
self.dispatch_for_await_of_close()?;
|
||
// 异步 IteratorClose 可能经 await 挂起（return() 的 promise），
|
||
// 挂起时须像 AWAIT 一样让内嵌 dispatch 返回，由恢复方快照状态。
|
||
if self.async_suspended || self.async_gen_suspended {
|
||
self.profiling.set_instruction_count(steps);
|
||
return Ok(JsValue::undefined());
|
||
}
|
||
}
|
||
|
||
OpCode::REST_OBJECT => {
|
||
self.dispatch_rest_object(rd, a, b)?;
|
||
}
|
||
|
||
OpCode::SPREAD_OBJECT => {
|
||
self.dispatch_spread_object(rd, a)?;
|
||
}
|
||
|
||
OpCode::THROW => match self.dispatch_throw(rd) {
|
||
Ok(true) => continue,
|
||
Ok(false) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::TRY_BEGIN => {
|
||
self.dispatch_try_begin(instr);
|
||
}
|
||
|
||
OpCode::TRY_END => {
|
||
self.dispatch_try_end();
|
||
}
|
||
|
||
OpCode::TRY_FINALLY_BEGIN => {
|
||
self.dispatch_try_finally_begin(instr);
|
||
}
|
||
|
||
OpCode::TRY_FINALLY_ENTER => {
|
||
self.dispatch_try_finally_enter();
|
||
}
|
||
|
||
OpCode::TRY_FINALLY_END => match self.dispatch_try_finally_end() {
|
||
Ok(Some(result)) => return Ok(result),
|
||
Ok(None) => {}
|
||
Err(e) => return Err(e),
|
||
},
|
||
|
||
OpCode::YIELD => {
|
||
// 生成器让出：把让出值存入信号，内嵌 dispatch 返回，恢复方快照挂起状态。
|
||
let value = self.regs[rd];
|
||
self.generator_suspended = Some(value);
|
||
self.profiling.set_instruction_count(steps);
|
||
return Ok(JsValue::undefined());
|
||
}
|
||
|
||
OpCode::YIELD_STAR => {
|
||
// `yield*` 委托：取内层迭代器并推进一步。
|
||
// 未 done → 挂起让出（存委托迭代器）；done → 委托完成值写 reg 0 继续外层；
|
||
// unwind 捕获到异常 → 继续 dispatch（已展开到 catch/finally）。
|
||
match self.dispatch_yield_star(rd)? {
|
||
crate::generator::YieldStarOutcome::Suspend(value) => {
|
||
self.generator_suspended = Some(value);
|
||
self.profiling.set_instruction_count(steps);
|
||
return Ok(JsValue::undefined());
|
||
}
|
||
crate::generator::YieldStarOutcome::Continue(value) => {
|
||
self.regs[0] = value;
|
||
}
|
||
crate::generator::YieldStarOutcome::Unwind => {}
|
||
}
|
||
}
|
||
|
||
OpCode::SUSPEND_BODY => {
|
||
// 生成器调用时参数初始化结束：挂起在 body 起点；正常 next() 恢复时直接穿过。
|
||
if self.generator_init_step {
|
||
self.generator_body_started = true;
|
||
self.profiling.set_instruction_count(steps);
|
||
return Ok(JsValue::undefined());
|
||
}
|
||
}
|
||
|
||
OpCode::AWAIT => {
|
||
// 异步帧挂起：登记恢复反应后内嵌 dispatch 返回，恢复方快照挂起状态。
|
||
self.dispatch_await(rd)?;
|
||
self.profiling.set_instruction_count(steps);
|
||
return Ok(JsValue::undefined());
|
||
}
|
||
|
||
_ => {
|
||
return Err(format!("opcode {op} not yet implemented"));
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
impl Default for Vm {
|
||
fn default() -> Self {
|
||
Self::new()
|
||
}
|
||
}
|
||
|
||
impl oxide_runtime_api::VmHost for Vm {
|
||
fn reg(&self, idx: u8) -> JsValue {
|
||
self.reg(idx)
|
||
}
|
||
fn set_reg(&mut self, idx: u8, val: JsValue) {
|
||
self.set_reg(idx, val);
|
||
}
|
||
fn native_overflow_count(&self) -> usize {
|
||
self.native_overflow_count
|
||
}
|
||
fn native_overflow_at(&self, i: usize) -> JsValue {
|
||
self.spill_stack[self.native_overflow_base + i]
|
||
}
|
||
fn alloc_object(&mut self, obj: JsObject) -> *mut JsObject {
|
||
self.alloc_object(obj)
|
||
}
|
||
fn new_string(&mut self, s: &str) -> JsValue {
|
||
self.new_string(s)
|
||
}
|
||
fn new_string_owned(&mut self, s: String) -> JsValue {
|
||
Vm::new_string_owned(self, s)
|
||
}
|
||
fn string_ref(&self, val: JsValue) -> &str {
|
||
// SAFETY: 调用方保证 val 为字符串值。perm 串由内核持有永不释放；session
|
||
// 串仅经 &mut self 路径（new_string/new_string_owned/GC）释放，此处 &self
|
||
// 借用期间编译器强制不存在 &mut 存续，字符串不会在借用期内回收。
|
||
unsafe { (*val.as_string_ptr()).as_str() }
|
||
}
|
||
fn new_bigint(&mut self, v: num_bigint::BigInt) -> JsValue {
|
||
Vm::new_bigint(self, v)
|
||
}
|
||
fn bigint_value(&mut self, val: JsValue) -> &num_bigint::BigInt {
|
||
Vm::bigint_value(self, val)
|
||
}
|
||
fn kernel_core(&self) -> &Arc<KernelCore> {
|
||
self.kernel_core()
|
||
}
|
||
fn session(&self) -> &KernelSession {
|
||
self.session()
|
||
}
|
||
fn epoch(&self) -> &Epoch {
|
||
self.epoch()
|
||
}
|
||
fn take_uncaught_value(&mut self) -> Option<JsValue> {
|
||
self.last_uncaught_value.take()
|
||
}
|
||
fn restore_uncaught_value(&mut self, value: Option<JsValue>) {
|
||
self.last_uncaught_value = value;
|
||
}
|
||
fn property_key_si(&mut self, val: JsValue) -> u32 {
|
||
// Object-key conversion (to_string_full) failures degrade to the empty key here:
|
||
// this trait path is used by Reflect/Object builtins; computed property access
|
||
// uses the inherent Result-returning version to preserve the full exception.
|
||
self.property_key_si(val)
|
||
.unwrap_or_else(|_| self.kernel_core.perm_interner().intern("").0)
|
||
}
|
||
fn to_property_key_si(&mut self, val: JsValue) -> Result<u32, String> {
|
||
// ToPropertyKey 完整路径：转换异常（对象 ToPrimitive 抛错 / Symbol 处理）
|
||
// 原样返回，供需传播异常的 builtins（groupBy / __defineGetter__ 等）使用。
|
||
self.property_key_si(val)
|
||
}
|
||
fn string_key_si(&mut self, s: &str) -> u32 {
|
||
if let Some(i) = canonical_index_of(s) {
|
||
make_int_key(i)
|
||
} else {
|
||
self.kernel_core.perm_interner().intern(s).0
|
||
}
|
||
}
|
||
fn resolve_property(&self, obj: &JsObject, prop_name_si: u32) -> Option<JsValue> {
|
||
self.resolve_property(obj, prop_name_si)
|
||
}
|
||
fn get_own_property_slot(&self, obj: &JsObject, prop_name_si: u32) -> Option<u32> {
|
||
self.get_own_property_slot(obj, prop_name_si)
|
||
}
|
||
fn ordinary_get(&mut self, obj: &JsObject, prop_name_si: u32, receiver: JsValue) -> Result<JsValue, String> {
|
||
self.ordinary_get(obj, prop_name_si, receiver)
|
||
}
|
||
fn ordinary_set(
|
||
&mut self, obj: &mut JsObject, prop_name_si: u32, val: JsValue, receiver: JsValue, strict: bool,
|
||
) -> Result<(), String> {
|
||
self.ordinary_set(obj, prop_name_si, val, receiver, strict)
|
||
}
|
||
fn define_data_property(
|
||
&mut self, obj: &mut JsObject, prop_name_si: u32, val: JsValue, attributes: PropAttributes,
|
||
) -> Result<(), String> {
|
||
self.define_data_property(obj, prop_name_si, val, attributes)
|
||
}
|
||
fn define_accessor_property(
|
||
&mut self, obj: &mut JsObject, prop_name_si: u32, get: JsValue, set: JsValue, attributes: PropAttributes,
|
||
) -> Result<(), String> {
|
||
self.define_accessor_property(obj, prop_name_si, get, set, attributes)
|
||
}
|
||
fn set_or_create_prop_value(&mut self, obj: &mut JsObject, prop_name_si: u32, val: JsValue) {
|
||
self.set_or_create_prop_value(obj, prop_name_si, val)
|
||
}
|
||
fn lookup_str(&self, val: JsValue) -> Option<String> {
|
||
self.lookup_str(val)
|
||
}
|
||
fn coerce_primitive_bounded(&mut self, value: JsValue, prefer_string: bool) -> Result<JsValue, String> {
|
||
self.coerce_primitive_bounded(value, prefer_string)
|
||
}
|
||
fn coerce_number_bounded(&mut self, value: JsValue) -> Result<f64, String> {
|
||
self.coerce_number_bounded(value)
|
||
}
|
||
fn call_function_sync(&mut self, callee: JsValue, receiver: JsValue, args: &[JsValue]) -> Result<JsValue, String> {
|
||
self.call_function_sync(callee, receiver, args)
|
||
}
|
||
fn checked_object_ptr(&mut self, val: JsValue, error_msg: &str) -> Result<Option<*mut JsObject>, String> {
|
||
self.checked_object_ptr(val, error_msg)
|
||
}
|
||
fn raise_type_error(&mut self, msg: &str) -> Result<(), String> {
|
||
self.raise_type_error(msg)
|
||
}
|
||
fn error_message_text(&self, kind: &str, msg: &str) -> String {
|
||
self.error_message_text(kind, msg)
|
||
}
|
||
fn call_stack_function_names(&self) -> Vec<String> {
|
||
self.frames
|
||
.iter()
|
||
.rev()
|
||
.map(|f| {
|
||
self.kernel_core
|
||
.perm_interner()
|
||
.lookup(f.function_name)
|
||
.unwrap_or("<anonymous>")
|
||
.to_string()
|
||
})
|
||
.collect()
|
||
}
|
||
fn promote_if_needed_for_write_ptr(&mut self, target_ptr: *mut JsObject, value: JsValue) -> JsValue {
|
||
self.promote_if_needed_for_write_ptr(target_ptr, value)
|
||
}
|
||
fn step_rng(&mut self) {
|
||
self.step_rng()
|
||
}
|
||
fn math_rng_value(&self) -> f64 {
|
||
self.math_rng_value()
|
||
}
|
||
fn sub_module_function_name(&self, sub_idx: u16) -> String {
|
||
self.sub_modules
|
||
.get(sub_idx as usize)
|
||
.and_then(|m| m.function_name.clone())
|
||
.unwrap_or_default()
|
||
}
|
||
fn create_dynamic_function(&mut self, params: &[String], body: &str) -> Result<JsValue, String> {
|
||
self.create_dynamic_function(params, body)
|
||
}
|
||
fn create_dynamic_script(&mut self, code: &str) -> Result<JsValue, String> {
|
||
self.create_dynamic_script(code)
|
||
}
|
||
fn symbol_intern(&mut self, desc: Option<String>) -> u32 {
|
||
self.symbols.intern(desc)
|
||
}
|
||
fn symbol_description(&self, idx: u32) -> Option<&str> {
|
||
self.symbols.description(idx)
|
||
}
|
||
fn symbol_lookup_global(&self, key: &str) -> Option<u32> {
|
||
self.symbols.lookup_global(key)
|
||
}
|
||
fn symbol_register_global(&mut self, key: String, idx: u32) {
|
||
self.symbols.register_global(key, idx)
|
||
}
|
||
fn symbol_key_for_id(&self, idx: u32) -> Option<String> {
|
||
self.symbols.key_for_id(idx)
|
||
}
|
||
}
|
||
|
||
impl Vm {
|
||
/// 动态编译函数（`Function` 构造器路径）：把参数列表与函数体 wrap 成匿名函数
|
||
/// 源码，走完整编译链后取匿名函数模块追加进 VM 平表，返回对应函数对象。
|
||
///
|
||
/// # 步骤
|
||
/// 1. wrap 源码 `function anonymous(p...) { body }`，parse + compile。
|
||
/// 2. 取 `sub_modules[0]`（匿名函数模块），把其子树 flat_id 重编号到平表末尾
|
||
/// 并重写子树内每条 `CREATE_CLOSURE` 的 imm16。
|
||
/// 3. 同步 resize `immutables_cache`，建函数对象并设置 name/length。
|
||
///
|
||
/// # 边界与前提
|
||
/// - 编译或解析失败返回 `Err`（由 builtin 层转 SyntaxError）。
|
||
/// - 追加的子树原 flat_id 自 1 连续（flatten 后 1=匿名体，2…=其嵌套函数）；
|
||
/// 新 id = 平表长度 + (old - 1)。
|
||
/// - 动态函数只在本次 `run()` 内有效：下次 run 重建平表，跨 run 引用会越界。
|
||
///
|
||
/// # 副作用
|
||
/// - 修改 `self.sub_modules` 与 `self.immutables_cache`。
|
||
pub fn create_dynamic_function(&mut self, params: &[String], body: &str) -> Result<JsValue, String> {
|
||
// wrap 源码：末尾换行防止 body 以行注释结尾吞掉右花括号。
|
||
let params_str = params.join(", ");
|
||
let source = format!("function anonymous({params_str}) {{\n{body}\n}}");
|
||
|
||
let allocator = oxide_parser::Allocator::default();
|
||
let program = oxide_parser::parse(&allocator, &source)
|
||
.map_err(|errs| errs.into_iter().map(|e| e.message).collect::<Vec<_>>().join("\n"))?;
|
||
let mut module = oxide_compiler::compiler::Compiler::new().compile(&program)?;
|
||
let anonymous = module.sub_modules.remove(0);
|
||
// 形参数以编译结果为准：单个实参 "a,b,c" 拼接后解析为 3 个形参
|
||
// （ES 动态函数把非末位实参以逗号连接成参数串再解析）。
|
||
let formal_count = anonymous.n_args as i32;
|
||
|
||
// 子树重编号 + 追加：base = 当前平表长度，DFS 前序压入，push 序即新 flat_id。
|
||
let base = self.sub_modules.len() as u32;
|
||
let mut added = Vec::new();
|
||
rehome_subtree(&anonymous, base, &mut added);
|
||
Arc::make_mut(&mut self.sub_modules).extend(added);
|
||
// 平表变长后同步扩容常量缓存，否则激活新模块常量时越界 panic。
|
||
self.immutables_cache
|
||
.extend((0..self.sub_modules.len().saturating_sub(self.immutables_cache.len())).map(|_| OnceLock::new()));
|
||
|
||
let func_val = self.create_function_object(base, false, false, false, false);
|
||
let func_obj = unsafe { &mut *func_val.as_js_object_ptr() };
|
||
let length_si = self.kernel_core.perm_interner().intern("length").0;
|
||
let name_si = self.kernel_core.perm_interner().intern("name").0;
|
||
// length/name 为不可写不可枚举可配置，且 length 先于 name（规范属性顺序）。
|
||
let attrs = PropAttributes::new(false, false, true);
|
||
let length_val = JsValue::int(formal_count);
|
||
let name_val = self.new_string("anonymous");
|
||
self.define_data_property(func_obj, length_si, length_val, attrs)?;
|
||
self.define_data_property(func_obj, name_si, name_val, attrs)?;
|
||
Ok(func_val)
|
||
}
|
||
|
||
/// 动态编译脚本（eval 脚本模式）：把源码按脚本模式编译，var/函数声明落全局对象
|
||
/// （属性 configurable:true，区别于普通脚本顶层的 false）。
|
||
///
|
||
/// # 步骤
|
||
/// 1. parse（脚本模式）→ compile（emit_program 置 is_global_scope=true，
|
||
/// Compiler 置 is_eval_script=true）。
|
||
/// 2. 整棵模块树（根 flat_id=0 + 嵌套函数）追加进平表：`rehome_subtree(&module, base+1)`，
|
||
/// 使根落 base、子函数 old→base+old，CREATE_CLOSURE imm16 同步重写。
|
||
/// 3. 扩容 immutables_cache，建函数对象（sub_module_index = base）返回。
|
||
///
|
||
/// # 边界与前提
|
||
/// - 顶层 return 不报 SyntaxError（emit 无此检查，与 CLI 脚本路径一致）——已知偏差。
|
||
/// - 动态模块只在本次 run() 内有效（同 create_dynamic_function）。
|
||
/// - 返回函数对象仅供内部同步调用，不设 name/length（用户不可见）。
|
||
///
|
||
/// # 副作用
|
||
/// - 修改 `self.sub_modules` 与 `self.immutables_cache`。
|
||
pub fn create_dynamic_script(&mut self, code: &str) -> Result<JsValue, String> {
|
||
let allocator = oxide_parser::Allocator::default();
|
||
let program = oxide_parser::parse(&allocator, code)
|
||
.map_err(|errs| errs.into_iter().map(|e| e.message).collect::<Vec<_>>().join("\n"))?;
|
||
// eval 脚本：顶层 var/function 声明落全局属性 configurable:true。
|
||
let module = oxide_compiler::compiler::Compiler::new()
|
||
.with_eval_script(true)
|
||
.compile(&program)?;
|
||
let base = self.sub_modules.len() as u32;
|
||
let mut added = Vec::new();
|
||
// 根模块 flat_id=0 传 base+1，重编号后落 base（避开 sub_module_index()==0 守卫）。
|
||
rehome_subtree(&module, base + 1, &mut added);
|
||
Arc::make_mut(&mut self.sub_modules).extend(added);
|
||
// 平表变长后同步扩容常量缓存，否则激活新模块常量时越界 panic。
|
||
self.immutables_cache
|
||
.extend((0..self.sub_modules.len().saturating_sub(self.immutables_cache.len())).map(|_| OnceLock::new()));
|
||
Ok(self.create_function_object(base, false, false, false, false))
|
||
}
|
||
}
|
||
|
||
/// 把 flatten 后的子模块子树重编号到平表偏移 `base`：DFS 前序拷贝进 `out`，
|
||
/// 新 flat_id = base + (old - 1)，子树内每条 `CREATE_CLOSURE` 的 imm16 同步重写。
|
||
/// 原子树 flat_id 自 1 连续，因此拷贝顺序即新 id 顺序，`out` 下标对齐平表槽位。
|
||
fn rehome_subtree(module: &CompiledModule, base: u32, out: &mut Vec<Arc<CompiledModule>>) {
|
||
let new_id = base + module.flat_id - 1;
|
||
let mut bytecode = module.bytecode.to_vec();
|
||
for instr in &mut bytecode {
|
||
if opcode::opcode(*instr) == OpCode::CREATE_CLOSURE {
|
||
let old = opcode::imm16(*instr) as u32;
|
||
let new_flat = base + (old - 1);
|
||
*instr = opcode::encode(
|
||
OpCode::CREATE_CLOSURE,
|
||
opcode::rd(*instr),
|
||
(new_flat & 0xFF) as u8,
|
||
((new_flat >> 8) & 0xFF) as u8,
|
||
);
|
||
}
|
||
}
|
||
let mut rehomed = module.clone();
|
||
rehomed.bytecode = Arc::from(bytecode);
|
||
rehomed.flat_id = new_id;
|
||
out.push(Arc::new(rehomed));
|
||
for sub in &module.sub_modules {
|
||
rehome_subtree(sub, base, out);
|
||
}
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use super::{opcode, ForOfEntry, JsValue, TryHandler, Vm};
|
||
use oxide_bytecode::module::CompiledModule;
|
||
use oxide_runtime_api::{NativeResult, VmHost};
|
||
use oxide_types::object::NativeFnPtr;
|
||
use oxide_types::object::{JsObject, PropAttributes};
|
||
use std::sync::{Arc, OnceLock};
|
||
|
||
fn native_return_7(_vm: &mut Vm, _args: &[u8]) -> NativeResult {
|
||
NativeResult::Ok(JsValue::int(7))
|
||
}
|
||
|
||
fn native_get_marker(vm: &mut Vm, args: &[u8]) -> NativeResult {
|
||
let this_val = vm.reg(args[0]);
|
||
if !this_val.is_object() {
|
||
return NativeResult::Ok(JsValue::undefined());
|
||
}
|
||
let marker_si = vm.kernel_core.perm_interner().intern("marker").0;
|
||
let obj = unsafe { &*this_val.as_js_object_ptr() };
|
||
NativeResult::Ok(vm.resolve_property(obj, marker_si).unwrap_or(JsValue::undefined()))
|
||
}
|
||
|
||
fn native_set_marker(vm: &mut Vm, args: &[u8]) -> NativeResult {
|
||
let this_val = vm.reg(args[0]);
|
||
let value = vm.reg(args[1]);
|
||
if !this_val.is_object() {
|
||
return NativeResult::Ok(JsValue::undefined());
|
||
}
|
||
let marker_si = vm.kernel_core.perm_interner().intern("marker").0;
|
||
let obj = unsafe { &mut *this_val.as_js_object_ptr() };
|
||
vm.set_or_create_prop_value(obj, marker_si, value);
|
||
NativeResult::Ok(JsValue::undefined())
|
||
}
|
||
|
||
fn native_return_last_arg(vm: &mut Vm, args: &[u8]) -> NativeResult {
|
||
let reg = *args.last().expect("receiver + args");
|
||
NativeResult::Ok(vm.reg(reg))
|
||
}
|
||
|
||
fn native_return_arg_count(_vm: &mut Vm, args: &[u8]) -> NativeResult {
|
||
NativeResult::Ok(JsValue::int(args.len().saturating_sub(1) as i32))
|
||
}
|
||
|
||
fn native_return_full_arg_count(vm: &mut Vm, args: &[u8]) -> NativeResult {
|
||
NativeResult::Ok(JsValue::int(vm.native_arg_count(args) as i32))
|
||
}
|
||
|
||
fn native_return_last_full_arg(vm: &mut Vm, args: &[u8]) -> NativeResult {
|
||
let n = vm.native_arg_count(args);
|
||
NativeResult::Ok(vm.native_arg_at(args, n - 1))
|
||
}
|
||
|
||
fn native_nested_inline_254(vm: &mut Vm, args: &[u8]) -> NativeResult {
|
||
// 外层 native 回调：receiver 落 regs[253]（native 分支单存槽），内嵌执行
|
||
// n_registers=254 的 inline 字节码回调后，receiver 槽必须保持外层值。
|
||
let receiver = vm.reg(args[0]);
|
||
let callee = vm.reg(args[1]);
|
||
let callee_obj = unsafe { &*callee.as_js_object_ptr() };
|
||
let mut call_args = Vec::with_capacity(args.len().saturating_sub(2));
|
||
for &r in &args[2..] {
|
||
call_args.push(vm.reg(r));
|
||
}
|
||
let kept = match vm.call_bytecode_function_inline(callee, callee_obj, receiver, &call_args) {
|
||
Ok(_) => vm.regs[253] == receiver,
|
||
Err(_) => false,
|
||
};
|
||
NativeResult::Ok(JsValue::int(if kept { 1 } else { 0 }))
|
||
}
|
||
|
||
fn native_function(vm: &mut Vm, f: crate::native::NativeFn) -> JsValue {
|
||
let proto = vm.session.builtin_world().function_proto.as_ptr() as *mut JsObject;
|
||
let mut obj = JsObject::new_empty(oxide_kernel::shape_forge::EMPTY_SHAPE_ID, JsValue::from_js_object(proto));
|
||
obj.set_function(true);
|
||
// SAFETY: f 是 NativeFn 函数项，可作为 NativeFnPtr 存储。
|
||
obj.set_native_fn(Some(unsafe { NativeFnPtr::from_raw(f as *const ()) }));
|
||
JsValue::object(vm.alloc_object(obj) as *mut u8)
|
||
}
|
||
|
||
fn plain_object(vm: &mut Vm) -> JsValue {
|
||
let proto = vm.session.builtin_world().object_proto.as_ptr() as *mut JsObject;
|
||
let obj = JsObject::new_empty(oxide_kernel::shape_forge::EMPTY_SHAPE_ID, JsValue::from_js_object(proto));
|
||
JsValue::object(vm.alloc_object(obj) as *mut u8)
|
||
}
|
||
|
||
fn add_accessor(vm: &mut Vm, obj_val: JsValue, name: &str, get: JsValue, set: JsValue) {
|
||
let si = vm.kernel_core.perm_interner().intern(name).0;
|
||
let obj = unsafe { &mut *obj_val.as_js_object_ptr() };
|
||
let shape_id = vm.kernel_core.shape_forge().make_shape(obj.shape_id(), si);
|
||
obj.set_shape_id(shape_id);
|
||
let pos = obj.push_prop(JsValue::undefined());
|
||
obj.set_accessor_meta(pos, get, set, PropAttributes::DEFAULT_DATA);
|
||
obj.bump_generation();
|
||
}
|
||
|
||
fn set_data(vm: &mut Vm, obj_val: JsValue, name: &str, val: JsValue) {
|
||
let si = vm.kernel_core.perm_interner().intern(name).0;
|
||
let obj = unsafe { &mut *obj_val.as_js_object_ptr() };
|
||
vm.set_or_create_prop_value(obj, si, val);
|
||
}
|
||
|
||
#[test]
|
||
fn reset_clears_runtime_state_like_rerun() {
|
||
let mut vm = Vm::new();
|
||
vm.regs[1] = JsValue::int(7);
|
||
vm.pc = 3;
|
||
vm.frames.push(super::CallFrame {
|
||
return_addr: 1,
|
||
function_name: 0,
|
||
caller_reg_limit: 2,
|
||
caller_active_reg_limit: 2,
|
||
saved_reg_offset: 0,
|
||
spill_offset: 0,
|
||
arguments_base: 0,
|
||
arguments_count: 0,
|
||
saved_this: JsValue::undefined(),
|
||
saved_new_target: JsValue::undefined(),
|
||
callee: JsValue::undefined(),
|
||
construct_result_reg: None,
|
||
strict: false,
|
||
constructed_this: None,
|
||
is_derived_constructor: false,
|
||
super_called: false,
|
||
continuation: super::FrameContinuation::None,
|
||
});
|
||
vm.save_stack.push(JsValue::undefined());
|
||
vm.iters
|
||
.for_in_iters
|
||
.push(std::ptr::dangling_mut::<super::ForInIter<'static>>());
|
||
vm.iters.for_of_iters.push(ForOfEntry {
|
||
iterator: JsValue::undefined(),
|
||
last_result: JsValue::undefined(),
|
||
is_async: false,
|
||
});
|
||
vm.saved_bytecode_stack
|
||
.push(Arc::from(vec![opcode::encode(opcode::OpCode::HALT, 0, 0, 0)]));
|
||
vm.saved_immutables_stack
|
||
.push(std::ptr::slice_from_raw_parts(std::ptr::null(), 0));
|
||
vm.try_stack.push(TryHandler {
|
||
catch_pc: Some(1),
|
||
finally_pc: None,
|
||
finally_active: false,
|
||
frame_depth: 0,
|
||
for_of_depth: 0,
|
||
});
|
||
vm.exception_value = Some(JsValue::int(2));
|
||
vm.pending_exception = Some(JsValue::int(3));
|
||
vm.pending_error_kind = Some("TypeError");
|
||
|
||
vm.reset();
|
||
|
||
assert_eq!(vm.pc, 0);
|
||
assert!(vm.frames.is_empty());
|
||
assert!(vm.save_stack.is_empty());
|
||
assert!(vm.iters.for_in_iters.is_empty());
|
||
assert!(vm.iters.for_of_iters.is_empty());
|
||
assert!(vm.saved_bytecode_stack.is_empty());
|
||
assert!(vm.saved_immutables_stack.is_empty());
|
||
assert!(vm.try_stack.is_empty());
|
||
assert!(vm.exception_value.is_none());
|
||
assert!(vm.pending_exception.is_none());
|
||
assert!(vm.pending_error_kind.is_none());
|
||
assert!(vm.bytecode.is_empty());
|
||
assert!(vm.immutables().is_empty());
|
||
}
|
||
|
||
#[test]
|
||
fn full_reset_clears_symbol_state() {
|
||
let mut vm = Vm::new();
|
||
vm.symbols.intern(Some("shared".to_string()));
|
||
|
||
vm.full_reset();
|
||
|
||
assert_eq!(vm.symbols.symbol_counter, 0);
|
||
assert!(vm.symbols.symbol_descriptions.is_empty());
|
||
assert!(vm.symbols.symbol_registry.is_empty());
|
||
}
|
||
|
||
#[test]
|
||
fn for_of_close_pops_iterator_stack() {
|
||
let module = CompiledModule {
|
||
bytecode: Arc::from(vec![
|
||
opcode::encode(opcode::OpCode::FOR_OF_CLOSE, 0, 0, 0),
|
||
opcode::encode(opcode::OpCode::HALT, 0, 0, 0),
|
||
]),
|
||
n_registers: 1,
|
||
..CompiledModule::new()
|
||
};
|
||
let mut vm = Vm::new();
|
||
vm.iters.for_of_iters.push(ForOfEntry {
|
||
iterator: JsValue::undefined(),
|
||
last_result: JsValue::undefined(),
|
||
is_async: false,
|
||
});
|
||
|
||
vm.run(&module).expect("FOR_OF_CLOSE should tolerate non-object sentinel");
|
||
|
||
assert!(vm.iters.for_of_iters.is_empty());
|
||
}
|
||
|
||
#[test]
|
||
fn write_ic_back_updates_slot_zero_ext_words() {
|
||
let mut vm = Vm::new();
|
||
vm.bytecode = Arc::from(vec![0; oxide_bytecode::opcode::IC_EXT_WORDS]);
|
||
vm.pc = oxide_bytecode::opcode::IC_EXT_WORDS;
|
||
crate::ic_helper::write_ic_back(Arc::make_mut(&mut vm.bytecode), vm.pc, 0x1234_5678, 7, 0);
|
||
assert_eq!(vm.bytecode[0], 0x0034_5678);
|
||
assert_eq!(vm.bytecode[1], 7);
|
||
}
|
||
|
||
#[test]
|
||
fn write_ic_back_rolls_fifo_and_drops_oldest_slot() {
|
||
let mut vm = Vm::new();
|
||
// 预置 8 字四槽（2 字/槽）：槽 0=(0xA1,1,0)、槽 1=(0xA2,2,1)、槽 2=(0xA3,3,0)、槽 3=(0xA4,4,0)。
|
||
let mut bc = vec![0u32; oxide_bytecode::opcode::IC_EXT_WORDS];
|
||
bc[0] = 0xA1;
|
||
bc[1] = 1;
|
||
bc[2] = 0xA2 | (1 << 24);
|
||
bc[3] = 2;
|
||
bc[4] = 0xA3;
|
||
bc[5] = 3;
|
||
bc[6] = 0xA4;
|
||
bc[7] = 4;
|
||
vm.bytecode = Arc::from(bc);
|
||
vm.pc = oxide_bytecode::opcode::IC_EXT_WORDS;
|
||
crate::ic_helper::write_ic_back(Arc::make_mut(&mut vm.bytecode), vm.pc, 0xB0, 9, 2);
|
||
// 新条目进槽 0；原槽 0..2 顺移到槽 1..3；最老槽 3 丢弃。
|
||
assert_eq!(vm.bytecode[0], 0xB0 | (2 << 24));
|
||
assert_eq!(vm.bytecode[1], 9);
|
||
assert_eq!(vm.bytecode[2], 0xA1);
|
||
assert_eq!(vm.bytecode[3], 1);
|
||
assert_eq!(vm.bytecode[4], 0xA2 | (1 << 24));
|
||
assert_eq!(vm.bytecode[5], 2);
|
||
assert_eq!(vm.bytecode[6], 0xA3);
|
||
assert_eq!(vm.bytecode[7], 3);
|
||
}
|
||
|
||
#[test]
|
||
fn unimplemented_profile_opcode_fails_explicitly() {
|
||
let module = CompiledModule {
|
||
bytecode: Arc::from(vec![
|
||
opcode::encode(opcode::OpCode::PROFILE_SHAPE, 0, 0, 0),
|
||
opcode::encode(opcode::OpCode::HALT, 0, 0, 0),
|
||
]),
|
||
n_registers: 1,
|
||
..CompiledModule::new()
|
||
};
|
||
let mut vm = Vm::new();
|
||
let err = vm.run(&module).expect_err("unimplemented opcode should fail explicitly");
|
||
assert_eq!(err, "opcode PROFILE_SHAPE not yet implemented");
|
||
}
|
||
|
||
#[test]
|
||
fn ordinary_get_calls_own_native_getter() {
|
||
let mut vm = Vm::new();
|
||
let obj_val = plain_object(&mut vm);
|
||
let getter = native_function(&mut vm, native_return_7);
|
||
add_accessor(&mut vm, obj_val, "x", getter, JsValue::undefined());
|
||
|
||
let x_si = vm.kernel_core.perm_interner().intern("x").0;
|
||
let obj = unsafe { &*obj_val.as_js_object_ptr() };
|
||
let value = vm.ordinary_get(obj, x_si, obj_val).expect("getter");
|
||
assert_eq!(value, JsValue::int(7));
|
||
}
|
||
|
||
#[test]
|
||
fn ordinary_set_calls_own_native_setter() {
|
||
let mut vm = Vm::new();
|
||
let obj_val = plain_object(&mut vm);
|
||
let setter = native_function(&mut vm, native_set_marker);
|
||
add_accessor(&mut vm, obj_val, "x", JsValue::undefined(), setter);
|
||
|
||
let x_si = vm.kernel_core.perm_interner().intern("x").0;
|
||
let obj = unsafe { &mut *obj_val.as_js_object_ptr() };
|
||
vm.ordinary_set(obj, x_si, JsValue::int(9), obj_val, true).expect("setter");
|
||
|
||
let marker_si = vm.kernel_core.perm_interner().intern("marker").0;
|
||
let obj = unsafe { &*obj_val.as_js_object_ptr() };
|
||
assert_eq!(vm.resolve_property(obj, marker_si), Some(JsValue::int(9)));
|
||
}
|
||
|
||
#[test]
|
||
fn inherited_getter_uses_original_receiver() {
|
||
let mut vm = Vm::new();
|
||
let proto_val = plain_object(&mut vm);
|
||
let child_val = plain_object(&mut vm);
|
||
let getter = native_function(&mut vm, native_get_marker);
|
||
add_accessor(&mut vm, proto_val, "x", getter, JsValue::undefined());
|
||
set_data(&mut vm, child_val, "marker", JsValue::int(42));
|
||
unsafe {
|
||
(*child_val.as_js_object_ptr()).set_proto(proto_val).expect("proto");
|
||
}
|
||
|
||
let x_si = vm.kernel_core.perm_interner().intern("x").0;
|
||
let child = unsafe { &*child_val.as_js_object_ptr() };
|
||
let value = vm.ordinary_get(child, x_si, child_val).expect("getter");
|
||
assert_eq!(value, JsValue::int(42));
|
||
}
|
||
|
||
#[test]
|
||
fn inherited_setter_uses_original_receiver() {
|
||
let mut vm = Vm::new();
|
||
let proto_val = plain_object(&mut vm);
|
||
let child_val = plain_object(&mut vm);
|
||
let setter = native_function(&mut vm, native_set_marker);
|
||
add_accessor(&mut vm, proto_val, "x", JsValue::undefined(), setter);
|
||
unsafe {
|
||
(*child_val.as_js_object_ptr()).set_proto(proto_val).expect("proto");
|
||
}
|
||
|
||
let x_si = vm.kernel_core.perm_interner().intern("x").0;
|
||
let child = unsafe { &mut *child_val.as_js_object_ptr() };
|
||
vm.ordinary_set(child, x_si, JsValue::int(12), child_val, true).expect("setter");
|
||
|
||
let marker_si = vm.kernel_core.perm_interner().intern("marker").0;
|
||
let child = unsafe { &*child_val.as_js_object_ptr() };
|
||
let proto = unsafe { &*proto_val.as_js_object_ptr() };
|
||
assert_eq!(vm.resolve_property(child, marker_si), Some(JsValue::int(12)));
|
||
assert_eq!(vm.resolve_property(proto, marker_si), None);
|
||
}
|
||
|
||
#[test]
|
||
fn deep_inherited_setter_uses_original_receiver() {
|
||
let mut vm = Vm::new();
|
||
let grand_proto_val = plain_object(&mut vm);
|
||
let proto_val = plain_object(&mut vm);
|
||
let child_val = plain_object(&mut vm);
|
||
let setter = native_function(&mut vm, native_set_marker);
|
||
add_accessor(&mut vm, grand_proto_val, "x", JsValue::undefined(), setter);
|
||
unsafe {
|
||
(*proto_val.as_js_object_ptr()).set_proto(grand_proto_val).expect("proto");
|
||
(*child_val.as_js_object_ptr()).set_proto(proto_val).expect("proto");
|
||
}
|
||
|
||
let x_si = vm.kernel_core.perm_interner().intern("x").0;
|
||
let child = unsafe { &mut *child_val.as_js_object_ptr() };
|
||
vm.ordinary_set(child, x_si, JsValue::int(15), child_val, true).expect("setter");
|
||
|
||
let marker_si = vm.kernel_core.perm_interner().intern("marker").0;
|
||
let child = unsafe { &*child_val.as_js_object_ptr() };
|
||
assert_eq!(vm.resolve_property(child, marker_si), Some(JsValue::int(15)));
|
||
}
|
||
|
||
#[test]
|
||
fn ordinary_data_property_still_reads_and_writes_without_meta() {
|
||
let mut vm = Vm::new();
|
||
let obj_val = plain_object(&mut vm);
|
||
set_data(&mut vm, obj_val, "x", JsValue::int(1));
|
||
|
||
let x_si = vm.kernel_core.perm_interner().intern("x").0;
|
||
let obj = unsafe { &mut *obj_val.as_js_object_ptr() };
|
||
assert!(!obj.has_prop_meta());
|
||
assert_eq!(vm.ordinary_get(obj, x_si, obj_val).expect("get"), JsValue::int(1));
|
||
vm.ordinary_set(obj, x_si, JsValue::int(2), obj_val, true).expect("set");
|
||
assert_eq!(vm.ordinary_get(obj, x_si, obj_val).expect("get"), JsValue::int(2));
|
||
}
|
||
|
||
#[test]
|
||
fn call_function_sync_passes_high_arity_native_args_without_truncation() {
|
||
let mut vm = Vm::new();
|
||
let callee = native_function(&mut vm, native_return_last_arg);
|
||
let args: Vec<JsValue> = (0..20).map(JsValue::int).collect();
|
||
|
||
let result = vm
|
||
.call_function_sync(callee, JsValue::undefined(), &args)
|
||
.expect("high-arity sync call should succeed");
|
||
|
||
assert_eq!(result, JsValue::int(19));
|
||
}
|
||
|
||
#[test]
|
||
fn call_function_sync_reports_actual_native_arg_count() {
|
||
let mut vm = Vm::new();
|
||
let callee = native_function(&mut vm, native_return_arg_count);
|
||
let args: Vec<JsValue> = (0..32).map(JsValue::int).collect();
|
||
|
||
let result = vm
|
||
.call_function_sync(callee, JsValue::undefined(), &args)
|
||
.expect("arg count should be preserved");
|
||
|
||
assert_eq!(result, JsValue::int(32));
|
||
}
|
||
|
||
#[test]
|
||
fn call_function_sync_overflow_preserves_large_native_arity_and_registers() {
|
||
// 大实参集（超寄存器窗口 253）经 spill 溢出区完整送达 native：
|
||
// 全量计数与末位实参都可读，且调用方寄存器不被打包过程污染。
|
||
let mut vm = Vm::new();
|
||
let callee = native_function(&mut vm, native_return_full_arg_count);
|
||
vm.set_reg(1, JsValue::int(7));
|
||
vm.set_reg(253, JsValue::int(11));
|
||
vm.set_reg(254, JsValue::int(12));
|
||
vm.set_reg(255, JsValue::int(13));
|
||
|
||
let args: Vec<JsValue> = (0..(Vm::SYNC_NATIVE_ARG_LIMIT + 100)).map(|i| JsValue::int(i as i32)).collect();
|
||
let count = vm
|
||
.call_function_sync(callee, JsValue::undefined(), &args)
|
||
.expect("大实参集应经 spill 溢出区完整送达 native");
|
||
assert_eq!(count, JsValue::int(args.len() as i32));
|
||
|
||
let last_callee = native_function(&mut vm, native_return_last_full_arg);
|
||
let last = vm
|
||
.call_function_sync(last_callee, JsValue::undefined(), &args)
|
||
.expect("溢出区末位实参应可读");
|
||
assert_eq!(last, JsValue::int((args.len() - 1) as i32));
|
||
|
||
assert_eq!(vm.reg(1), JsValue::int(7));
|
||
assert_eq!(vm.reg(253), JsValue::int(11));
|
||
assert_eq!(vm.reg(254), JsValue::int(12));
|
||
assert_eq!(vm.reg(255), JsValue::int(13));
|
||
// 溢出区随调用结束截断回收，不残留 spill 增长。
|
||
assert!(vm.spill_stack.is_empty(), "溢出区应已回收: {:?}", vm.spill_stack);
|
||
assert_eq!(vm.native_overflow_count, 0);
|
||
}
|
||
|
||
/// 构造 `n_registers = 254` 的子模块：RegAlloc 合法产物（builtin 槽落 253 或
|
||
/// 高活度着色），其函数体写物理槽 253 后返回。
|
||
fn sub_module_254_with_r253_write() -> CompiledModule {
|
||
CompiledModule {
|
||
bytecode: Arc::from(vec![
|
||
opcode::encode(opcode::OpCode::MOV, 253, 0, 0),
|
||
opcode::encode(opcode::OpCode::HALT, 0, 0, 0),
|
||
]),
|
||
n_registers: 254,
|
||
..CompiledModule::new()
|
||
}
|
||
}
|
||
|
||
#[test]
|
||
fn inline_callee_254_registers_preserves_caller_active_r253() {
|
||
// 窗口化边界回归：inline 回调 callee 的 n_registers = 254（写物理槽 253）
|
||
// 且调用方 active_reg_limit = 254（regs[253] 为活动值）时，调用后
|
||
// regs[253] 必须恢复为调用方值，不得被 callee 写值覆盖。
|
||
let mut vm = Vm::new();
|
||
vm.sub_modules = Arc::new(vec![Arc::new(CompiledModule::new()), Arc::new(sub_module_254_with_r253_write())]);
|
||
vm.immutables_cache
|
||
.extend((0..vm.sub_modules.len().saturating_sub(vm.immutables_cache.len())).map(|_| OnceLock::new()));
|
||
vm.active_reg_limit = 254;
|
||
vm.regs[253] = JsValue::int(42);
|
||
|
||
let callee = vm.create_function_object(1, false, false, false, false);
|
||
let callee_obj = unsafe { &*callee.as_js_object_ptr() };
|
||
let result = vm
|
||
.call_bytecode_function_inline(callee, callee_obj, JsValue::undefined(), &[])
|
||
.expect("inline call should succeed");
|
||
|
||
assert_eq!(result, JsValue::undefined());
|
||
assert_eq!(vm.regs[253], JsValue::int(42), "调用方 regs[253] 活动值不得被 callee 覆盖");
|
||
assert_eq!(vm.active_reg_limit, 254, "restore 应还原调用方活动寄存器上限");
|
||
}
|
||
|
||
#[test]
|
||
fn native_callback_nested_254_register_inline_callee_keeps_receiver() {
|
||
// 嵌套回归防线：native 回调体（receiver 落 regs[253]）内嵌 n_registers=254
|
||
// 的 inline 字节码回调时，内层写 regs[253] 不得污染外层 receiver 槽。
|
||
let mut vm = Vm::new();
|
||
vm.sub_modules = Arc::new(vec![Arc::new(CompiledModule::new()), Arc::new(sub_module_254_with_r253_write())]);
|
||
vm.immutables_cache
|
||
.extend((0..vm.sub_modules.len().saturating_sub(vm.immutables_cache.len())).map(|_| OnceLock::new()));
|
||
vm.active_reg_limit = 254;
|
||
vm.regs[253] = JsValue::int(7);
|
||
vm.regs[254] = JsValue::int(8);
|
||
|
||
let inner_callee = vm.create_function_object(1, false, false, false, false);
|
||
let outer_native = native_function(&mut vm, native_nested_inline_254);
|
||
let result = vm
|
||
.call_function_sync(outer_native, JsValue::int(99), &[inner_callee])
|
||
.expect("native callback should succeed");
|
||
|
||
assert_eq!(result, JsValue::int(1), "内嵌 inline 回调后外层 receiver 槽必须保持原值");
|
||
assert_eq!(vm.regs[253], JsValue::int(7), "native 分支恢复后调用方 regs[253] 保持");
|
||
assert_eq!(vm.regs[254], JsValue::int(8), "native 分支恢复后调用方 regs[254] 保持");
|
||
}
|
||
|
||
#[test]
|
||
fn push_bytecode_frame_param_overlap_reads_spill_first() {
|
||
// 实参源区间 regs[1..3) 与 callee 形参写入区 regs[2..4) 重叠（first < param_base）：
|
||
// 压帧必须先拷 spill 实参区、形参再从 spill 区取源，避免边写形参边读实参
|
||
// 造成先写后读串值（形参 b 与 spill 实参区都取错）。
|
||
let mut vm = Vm::new();
|
||
// sub_modules[1] = callee：2 个形参，param_base=2（与调用方实参槽 2 重叠）
|
||
let mut callee_mod = CompiledModule::new();
|
||
callee_mod.n_args = 2;
|
||
callee_mod.param_base = 2;
|
||
callee_mod.n_registers = 5;
|
||
callee_mod.bytecode = Arc::from(vec![opcode::encode(opcode::OpCode::RETURN, 0, 0, 0)]);
|
||
vm.sub_modules = Arc::new(vec![Arc::new(CompiledModule::new()), Arc::new(callee_mod)]);
|
||
vm.immutables_cache
|
||
.extend((0..vm.sub_modules.len().saturating_sub(vm.immutables_cache.len())).map(|_| OnceLock::new()));
|
||
vm.active_reg_limit = 8;
|
||
// 调用方实参区 regs[1..3)：arg0=10, arg1=20；regs[2] 同时是 callee 形参槽（param_base=2）
|
||
vm.regs[1] = JsValue::int(10);
|
||
vm.regs[2] = JsValue::int(20);
|
||
|
||
let callee = vm.create_function_object(1, false, false, false, false);
|
||
vm.push_bytecode_frame(
|
||
callee,
|
||
JsValue::undefined(),
|
||
super::FrameArgs::RegRange { first: 1, count: 2 },
|
||
None,
|
||
None,
|
||
JsValue::undefined(),
|
||
super::FrameContinuation::None,
|
||
0,
|
||
)
|
||
.expect("压帧成功");
|
||
// 形参从 spill 实参区取源：regs[2]=arg0=10，regs[3]=arg1=20（不得被先写覆盖）
|
||
assert_eq!(vm.regs[2], JsValue::int(10), "形参 a 应为实参 arg0");
|
||
assert_eq!(vm.regs[3], JsValue::int(20), "形参 b 应为实参 arg1（不受先写覆盖）");
|
||
// spill 实参区（arguments 对象源）保持原实参值
|
||
let frame = vm.frames.last().expect("压帧后应有帧");
|
||
let base = frame.arguments_base as usize;
|
||
assert_eq!(vm.spill_stack[base], JsValue::int(10), "spill 实参区 arg0");
|
||
assert_eq!(vm.spill_stack[base + 1], JsValue::int(20), "spill 实参区 arg1");
|
||
}
|
||
|
||
#[test]
|
||
fn dispatch_new_expression_param_overlap_reads_spill_first() {
|
||
// NEW 收敛路径同款重叠几何（实参源 regs[1..3) 与 callee 形参写入区 regs[2..4)
|
||
// 重叠，first < param_base）：经 NEW_EXPRESSION 入口压帧，形参与 spill 实参区
|
||
// （arguments 对象源）必须取原始实参值，不得先写后读串值。
|
||
let mut vm = Vm::new();
|
||
// sub_modules[1] = 构造器：2 个形参，param_base=2（与调用方实参槽 2 重叠）
|
||
let mut ctor_mod = CompiledModule::new();
|
||
ctor_mod.n_args = 2;
|
||
ctor_mod.param_base = 2;
|
||
ctor_mod.n_registers = 5;
|
||
ctor_mod.bytecode = Arc::from(vec![opcode::encode(opcode::OpCode::RETURN, 0, 0, 0)]);
|
||
vm.sub_modules = Arc::new(vec![Arc::new(CompiledModule::new()), Arc::new(ctor_mod)]);
|
||
vm.immutables_cache
|
||
.extend((0..vm.sub_modules.len().saturating_sub(vm.immutables_cache.len())).map(|_| OnceLock::new()));
|
||
vm.active_reg_limit = 8;
|
||
// NEW_EXPRESSION 指令：ext 低 8 位 = 实参个数 2，高 8 位 = 窗口 0（全量）
|
||
vm.bytecode = Arc::from(vec![opcode::encode(opcode::OpCode::NEW_EXPRESSION, 0, 0, 0), 2]);
|
||
vm.pc = 0;
|
||
// 调用方实参区 regs[1..3)：arg0=10, arg1=20；regs[2] 同时是 callee 形参槽（param_base=2）
|
||
vm.regs[1] = JsValue::int(10);
|
||
vm.regs[2] = JsValue::int(20);
|
||
vm.regs[5] = vm.create_function_object(1, false, false, false, false);
|
||
|
||
vm.dispatch_new_expression(0, 5, 1).expect("NEW 压帧成功");
|
||
|
||
let frame = vm.frames.last().expect("压帧后应有帧");
|
||
// 形参从 spill 实参区取源：regs[2]=arg0=10，regs[3]=arg1=20（不得被先写覆盖）
|
||
assert_eq!(vm.regs[2], JsValue::int(10), "形参 a 应为实参 arg0");
|
||
assert_eq!(vm.regs[3], JsValue::int(20), "形参 b 应为实参 arg1（不受先写覆盖）");
|
||
// spill 实参区（arguments 对象源）保持原实参值
|
||
let base = frame.arguments_base as usize;
|
||
assert_eq!(vm.spill_stack[base], JsValue::int(10), "spill 实参区 arg0");
|
||
assert_eq!(vm.spill_stack[base + 1], JsValue::int(20), "spill 实参区 arg1");
|
||
// NEW 帧契约：构造结果寄存器与 constructed_this 随帧携带
|
||
assert_eq!(frame.construct_result_reg, Some(0), "构造结果写回 regs[0]");
|
||
assert!(
|
||
frame.constructed_this.is_some_and(|v| v.is_object()),
|
||
"基类构造路径 constructed_this 应为新对象"
|
||
);
|
||
assert!(!frame.is_derived_constructor, "普通函数非 derived 构造器");
|
||
}
|
||
}
|