mirror of
https://github.com/pjh456/OxideJS.git
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56 lines
2.4 KiB
Rust
56 lines
2.4 KiB
Rust
//! 生成器 × session GC 回归：full_reset 逐对象释放 session 生成器（本体 + 堆数据
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//! + upvalue 列表，各单所有权），不 double-free、不悬垂，VM 继续可用。
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//!
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//! sweep 变体与闭包捕获变体见 `vm_support.rs` 内部测试（需 crate 内 `resume_generator`
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//! 在模块表未重建时恢复执行，integration 层无法触达）。
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use std::sync::Arc;
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use oxide_compiler::compiler::Compiler;
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use oxide_parser::Allocator;
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use oxide_vm::vm::Vm;
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fn compile(source: &str) -> oxide_bytecode::module::CompiledModule {
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let allocator = Allocator::default();
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let program = oxide_parser::parse(&allocator, source).expect("parse");
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Compiler::new().compile(&program).expect("compile")
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}
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/// full_reset 变体：global 根持有生成器，full_reset 释放其本体、堆数据与
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/// upvalue 列表（各单所有权），不 double-free、不悬垂，VM 继续可用。
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#[test]
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fn generator_promoted_to_global_survives_full_reset_cleanly() {
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let mut vm = Vm::new();
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vm.run(&Arc::new(compile(
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"function* g(){ yield 1; yield 2; } globalThis.it = g(); globalThis.it.next(); 0",
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)))
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.expect("run1");
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assert!(vm.session_object_count() > 0, "生成器挂 global 应为 session 对象");
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// global 含 session 对象即强制重建：旧 global 丢弃、it 槽不存在，全程无悬垂访问。
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vm.full_reset();
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assert_eq!(vm.session_object_count(), 0, "full_reset 应清空 session 对象");
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let result = vm.run(&Arc::new(compile("typeof it"))).expect("run2");
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let text = vm.lookup_str(result).expect("typeof 应返回字符串").to_string();
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assert_eq!(text, "undefined");
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// 新会话可正常创建并推进生成器。
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let ok = vm
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.run(&Arc::new(compile("function* h(){ yield 9; } var it2 = h(); it2.next().value")))
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.expect("run3");
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assert_eq!(format!("{ok}"), "9");
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}
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/// 闭包跨 yield 读 upvalue：生成器挂起再恢复时活动镜像必须还原为生成器自己的
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/// 表（恢复置位漏掉时，恢复体读顶层空表，upvalue 读回退惰性路径得 undefined）。
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#[test]
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fn generator_reads_upvalue_across_yield() {
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let mut vm = Vm::new();
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let result = vm
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.run(&Arc::new(compile(
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"function make() { var x = 1; function* g() { yield x; yield x; } var it = g(); it.next(); x = 2; return it.next().value; } make()",
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)))
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.expect("run");
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assert_eq!(format!("{result}"), "2");
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}
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