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refactor: 退役根重写镜像与对象克隆重写族，保留原地 sweep 弱键定夺

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This commit is contained in:
彭俊皓
2026-10-02 19:24:56 +00:00
parent 89655f0b7f
commit 43acaacd08
10 changed files with 11 additions and 424 deletions
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crates/oxide_vm/src/session_gc/tests.rs
-47
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@@ -131,53 +131,6 @@ fn gc_roots_contains_registers_frames_and_root_roots() {
assert_eq!(vm.exception_value, Some(JsValue::from_js_object(root_session)));
}
#[test]
fn rewrite_matches_roots_coverage() {
// 指针重写必须覆盖根收集访问的同一组执行核心字段：session→marker 映射后，
// 每个持有 session 的字段都应被改写为 marker（与上文基于 for_each 的覆盖
// 测试同口径，共同构成孪生清单验证）。
let mut vm = Vm::new();
let obj = plain_object(&mut vm);
let session = obj;
let marker = plain_object(&mut vm);
let marker_session = marker;
vm.regs[0] = JsValue::from_js_object(session);
vm.last_uncaught_value = Some(JsValue::from_js_object(session));
vm.generator_suspended = Some(JsValue::from_js_object(session));
vm.delegated_iterator = Some(JsValue::from_js_object(session));
vm.async_context = Some(JsValue::from_js_object(session));
vm.async_gen_context = Some(JsValue::from_js_object(session));
vm.inline_callee = Some(JsValue::from_js_object(session));
vm.pending_completion = Some(crate::vm::Completion::Return {
value: JsValue::from_js_object(session),
remaining_finally: 0,
for_of_count: 0,
for_in_count: 0,
});
let mut forwarding = std::collections::HashMap::new();
forwarding.insert(session, marker_session);
vm.rewrite_values(|v| {
if v.is_object() {
if let Some(&m) = forwarding.get(&v.as_js_object_ptr()) {
return JsValue::from_js_object(m);
}
}
v
});
assert_eq!(vm.regs[0].as_js_object_ptr(), marker_session);
assert_eq!(vm.last_uncaught_value.unwrap().as_js_object_ptr(), marker_session);
assert_eq!(vm.generator_suspended.unwrap().as_js_object_ptr(), marker_session);
assert_eq!(vm.delegated_iterator.unwrap().as_js_object_ptr(), marker_session);
assert_eq!(vm.async_context.unwrap().as_js_object_ptr(), marker_session);
assert_eq!(vm.async_gen_context.unwrap().as_js_object_ptr(), marker_session);
assert_eq!(vm.inline_callee.unwrap().as_js_object_ptr(), marker_session);
match vm.pending_completion.unwrap() {
crate::vm::Completion::Return { value, .. } => assert_eq!(value.as_js_object_ptr(), marker_session),
_ => panic!("expected Return completion"),
}
}
#[test]
fn mark_phase_reaches_cycles_and_unreachable_are_unmarked() {
let mut vm = Vm::new();