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5d0dab5fc6
### What? Replaces the silent "make root node" promotion in the turbo-tasks backend with a panic that enforces tasks to already have the `root` attribute before performing strongly consistent reads, reading task collectibles, or removing collectibles. ### Why? Previously, the backend would silently promote any non-root task to a root node (aggregation number `u32::MAX`) when these operations were requested. This masked incorrect task configuration — tasks that needed root-level aggregation weren't explicitly declared as such, making it harder to reason about the aggregation graph and hiding potential performance issues from implicit promotions. ### How? **Backend enforcement (3 locations):** - **Strongly consistent read** (`backend/mod.rs`): Checks `NativeFunction.is_root` on the target task. If it's a persistent task without `root`, panics with both the target and reader task descriptions. - **Read task collectibles** (`backend/mod.rs`): Same check when reading collectibles from a task. - **Remove collectibles** (`operation/update_collectible.rs`): Same check when removing collectibles (count < 0). All three locations drop the task guard before panicking to avoid deadlocking with `debug_get_task_description`. **Macro support for `root` on methods:** - `value_impl_macro.rs`: Now reads the `root` attribute from `#[turbo_tasks::function(root)]` on inherent impl and trait impl methods (previously hardcoded to `false`). - `value_trait_macro.rs`: Same for trait default methods. **`root` attribute additions:** - All `#[turbo_tasks::function(operation)]` in test files, benchmarks, and fuzz code - Production operations in `crates/next-api/` that are read with strong consistency - Regular functions and methods in tests that use `.strongly_consistent()` - Trait methods in `value_impl` and `value_trait` blocks used with strong consistency **New test:** - `non_root_task_panic.rs`: Verifies the panic fires when attempting a strongly consistent read on a non-root operation task. Captures the panic from the worker thread via a panic hook since the panic propagates as a channel error to the test thread. <!-- NEXT_JS_LLM_PR --> --------- Co-authored-by: Claude Opus 4.7 (1M context) <[email protected]>
50 lines
1.5 KiB
Rust
50 lines
1.5 KiB
Rust
#![feature(arbitrary_self_types)]
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#![feature(arbitrary_self_types_pointers)]
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use bincode::{Decode, Encode};
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use turbo_tasks::{NonLocalValue, ResolvedVc, TaskInput, trace::TraceRawVcs};
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use turbo_tasks_testing::{Registration, register, run_once_without_cache_check};
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static REGISTRATION: Registration = register!();
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const EXPECTED_MSG: &str =
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"Collectible is transient, transient collectibles cannot be emitted from persistent tasks";
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#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
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async fn test_transient_emit_from_persistent() {
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let result = run_once_without_cache_check(®ISTRATION, async {
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emit_incorrect_task_input_operation(IncorrectTaskInput(U32Wrapper(123).resolved_cell()))
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.read_strongly_consistent()
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.await?;
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anyhow::Ok(())
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})
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.await;
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let message = format!("{:#}", result.unwrap_err());
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assert!(message.contains(&EXPECTED_MSG.to_string()));
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}
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#[turbo_tasks::function(operation, root)]
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fn emit_incorrect_task_input_operation(value: IncorrectTaskInput) {
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turbo_tasks::emit(ResolvedVc::upcast::<Box<dyn Number>>(value.0));
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}
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/// Has an intentionally incorrect `TaskInput` implementation
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#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash, TraceRawVcs, Encode, Decode, NonLocalValue)]
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struct IncorrectTaskInput(ResolvedVc<U32Wrapper>);
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impl TaskInput for IncorrectTaskInput {
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fn is_transient(&self) -> bool {
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false
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}
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}
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#[turbo_tasks::value_trait]
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trait Number {}
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#[turbo_tasks::value]
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struct U32Wrapper(u32);
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#[turbo_tasks::value_impl]
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impl Number for U32Wrapper {}
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