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refactor: 提取 Realm 组合类型，session 与 GC 及原型槽归 realm

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彭俊皓
2026-10-07 00:10:27 +00:00
parent add910a504
commit 14ef287a75
31 changed files with 598 additions and 567 deletions
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crates/oxide_vm/src/vm/dispatch_loop.rs
+9 -9
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@@ -128,29 +128,29 @@ impl Vm {
// 宿主 `$262.gc()` 置位的强制收集与压力模式收集在此边界消费：
// 完整收集唯一安全点（无在途 dispatch 局部值），与正常触发路径
// 同一入口。压力模式开启后每个顶层边界做一次完整收集。
if self.gc_state.pending_forced_collect || self.gc_state.gc_pressure_mode {
self.gc_state.pending_forced_collect = false;
if self.realm.gc.pending_forced_collect || self.realm.gc.gc_pressure_mode {
self.realm.gc.pending_forced_collect = false;
self.collect_session_gc();
}
// 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;
let bytes = self.realm.gc.session_bytes_allocated;
if bytes > self.realm.gc.session_bytes_peak {
self.realm.gc.session_bytes_peak = bytes;
}
// 单 run 分配包络高水位：O(1) 读（手工账目 + BigInt/cell 表长）。
let alloc = self.run_alloc_bytes();
if alloc > self.gc_state.run_alloc_peak {
self.gc_state.run_alloc_peak = alloc;
if alloc > self.realm.gc.run_alloc_peak {
self.realm.gc.run_alloc_peak = alloc;
}
// 压力模式开启时跳过两档水位收集：完整收集已涵盖其全部工作，
// 同边界双触发只会多一轮空转 mark。
if bytes >= self.gc_state.string_gc_watermark && !self.gc_state.gc_pressure_mode {
if bytes >= self.realm.gc.string_gc_watermark && !self.realm.gc.gc_pressure_mode {
self.maybe_collect_session_strings();
}
// 执行期原地 sweep 收集：O(1) 包络超触发水位 → 收集（无门控：
// 迭代器键引用经根收集标活，原地释放不搬移存活对象；
// 边界契约见 maybe_collect_in_run）。
if alloc >= self.gc_state.gc_watermark && !self.gc_state.gc_pressure_mode {
if alloc >= self.realm.gc.gc_watermark && !self.realm.gc.gc_pressure_mode {
self.maybe_collect_in_run();
}
}