mirror of
https://github.com/denoland/deno.git
synced 2024-11-24 15:19:26 -05:00
feat: async context (#24402)
We are switching to ContinuationPreservedEmbedderData. This allows adding async context tracking to the various async operations that deno provides. Fixes: https://github.com/denoland/deno/issues/7010 Fixes: https://github.com/denoland/deno/issues/22886 Fixes: https://github.com/denoland/deno/issues/24368
This commit is contained in:
snek
GitHub
parent
b82a2f114c
commit
3a1a1cc030
8 changed files with 208 additions and 294 deletions
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@ -181,15 +181,6 @@ fn op_node_build_os() -> String {
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env!("TARGET").split('-').nth(2).unwrap().to_string()
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}
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#[op2(fast)]
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fn op_node_is_promise_rejected(value: v8::Local<v8::Value>) -> bool {
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let Ok(promise) = v8::Local::<v8::Promise>::try_from(value) else {
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return false;
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};
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promise.state() == v8::PromiseState::Rejected
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}
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#[op2]
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#[string]
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fn op_npm_process_state(state: &mut OpState) -> Result<String, AnyError> {
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@ -350,7 +341,6 @@ deno_core::extension!(deno_node,
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ops::os::op_cpus<P>,
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ops::os::op_homedir<P>,
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op_node_build_os,
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op_node_is_promise_rejected,
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op_npm_process_state,
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ops::require::op_require_init_paths,
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ops::require::op_require_node_module_paths<P>,
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@ -5,6 +5,10 @@
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// deno-lint-ignore-file prefer-primordials
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import { core } from "ext:core/mod.js";
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import {
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getAsyncContext,
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setAsyncContext,
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} from "ext:runtime/01_async_context.js";
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import { validateFunction } from "ext:deno_node/internal/validators.mjs";
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import { _exiting } from "ext:deno_node/_process/exiting.ts";
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@ -13,6 +17,7 @@ import { FixedQueue } from "ext:deno_node/internal/fixed_queue.ts";
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interface Tock {
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callback: (...args: Array<unknown>) => void;
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args: Array<unknown>;
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snapshot: unknown;
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}
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let nextTickEnabled = false;
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@ -23,7 +28,7 @@ export function enableNextTick() {
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const queue = new FixedQueue();
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export function processTicksAndRejections() {
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let tock;
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let tock: Tock;
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do {
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// deno-lint-ignore no-cond-assign
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while (tock = queue.shift()) {
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@ -31,9 +36,11 @@ export function processTicksAndRejections() {
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// const asyncId = tock[async_id_symbol];
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// emitBefore(asyncId, tock[trigger_async_id_symbol], tock);
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const oldContext = getAsyncContext();
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try {
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const callback = (tock as Tock).callback;
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if ((tock as Tock).args === undefined) {
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setAsyncContext(tock.snapshot);
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const callback = tock.callback;
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if (tock.args === undefined) {
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callback();
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} else {
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const args = (tock as Tock).args;
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@ -58,6 +65,7 @@ export function processTicksAndRejections() {
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// FIXME(bartlomieju): Deno currently doesn't support async hooks
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// if (destroyHooksExist())
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// emitDestroy(asyncId);
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setAsyncContext(oldContext);
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}
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// FIXME(bartlomieju): Deno currently doesn't support async hooks
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@ -143,6 +151,7 @@ export function nextTick<T extends Array<unknown>>(
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// FIXME(bartlomieju): Deno currently doesn't support async hooks
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// [async_id_symbol]: asyncId,
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// [trigger_async_id_symbol]: triggerAsyncId,
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snapshot: getAsyncContext(),
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callback,
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args: args_,
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};
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@ -1,191 +1,34 @@
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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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// Copyright Joyent and Node contributors. All rights reserved. MIT license.
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// This implementation is inspired by "workerd" AsyncLocalStorage implementation:
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// https://github.com/cloudflare/workerd/blob/77fd0ed6ddba184414f0216508fc62b06e716cab/src/workerd/api/node/async-hooks.c++#L9
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// TODO(petamoriken): enable prefer-primordials for node polyfills
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// deno-lint-ignore-file prefer-primordials
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import { core } from "ext:core/mod.js";
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import { op_node_is_promise_rejected } from "ext:core/ops";
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import { primordials } from "ext:core/mod.js";
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import {
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AsyncVariable,
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getAsyncContext,
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setAsyncContext,
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} from "ext:runtime/01_async_context.js";
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import { validateFunction } from "ext:deno_node/internal/validators.mjs";
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import { newAsyncId } from "ext:deno_node/internal/async_hooks.ts";
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function assert(cond: boolean) {
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if (!cond) throw new Error("Assertion failed");
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}
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const asyncContextStack: AsyncContextFrame[] = [];
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function pushAsyncFrame(frame: AsyncContextFrame) {
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asyncContextStack.push(frame);
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}
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function popAsyncFrame() {
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if (asyncContextStack.length > 0) {
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asyncContextStack.pop();
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}
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}
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let rootAsyncFrame: AsyncContextFrame | undefined = undefined;
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let promiseHooksSet = false;
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const asyncContext = Symbol("asyncContext");
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function setPromiseHooks() {
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if (promiseHooksSet) {
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return;
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}
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promiseHooksSet = true;
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const init = (promise: Promise<unknown>) => {
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const currentFrame = AsyncContextFrame.current();
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if (!currentFrame.isRoot()) {
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if (typeof promise[asyncContext] !== "undefined") {
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throw new Error("Promise already has async context");
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}
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AsyncContextFrame.attachContext(promise);
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}
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};
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const before = (promise: Promise<unknown>) => {
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const maybeFrame = promise[asyncContext];
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if (maybeFrame) {
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pushAsyncFrame(maybeFrame);
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} else {
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pushAsyncFrame(AsyncContextFrame.getRootAsyncContext());
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}
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};
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const after = (promise: Promise<unknown>) => {
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popAsyncFrame();
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if (!op_node_is_promise_rejected(promise)) {
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// @ts-ignore promise async context
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promise[asyncContext] = undefined;
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}
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};
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const resolve = (promise: Promise<unknown>) => {
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const currentFrame = AsyncContextFrame.current();
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if (
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!currentFrame.isRoot() && op_node_is_promise_rejected(promise) &&
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typeof promise[asyncContext] === "undefined"
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) {
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AsyncContextFrame.attachContext(promise);
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}
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};
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core.setPromiseHooks(init, before, after, resolve);
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}
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class AsyncContextFrame {
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storage: StorageEntry[];
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constructor(
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maybeParent?: AsyncContextFrame | null,
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maybeStorageEntry?: StorageEntry | null,
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isRoot = false,
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) {
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this.storage = [];
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setPromiseHooks();
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const propagate = (parent: AsyncContextFrame) => {
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parent.storage = parent.storage.filter((entry) => !entry.key.isDead());
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parent.storage.forEach((entry) => this.storage.push(entry.clone()));
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if (maybeStorageEntry) {
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const existingEntry = this.storage.find((entry) =>
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entry.key === maybeStorageEntry.key
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);
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if (existingEntry) {
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existingEntry.value = maybeStorageEntry.value;
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} else {
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this.storage.push(maybeStorageEntry);
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}
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}
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};
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if (!isRoot) {
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if (maybeParent) {
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propagate(maybeParent);
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} else {
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propagate(AsyncContextFrame.current());
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}
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}
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}
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static tryGetContext(promise: Promise<unknown>) {
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// @ts-ignore promise async context
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return promise[asyncContext];
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}
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static attachContext(promise: Promise<unknown>) {
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// @ts-ignore promise async context
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promise[asyncContext] = AsyncContextFrame.current();
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}
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static getRootAsyncContext() {
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if (typeof rootAsyncFrame !== "undefined") {
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return rootAsyncFrame;
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}
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rootAsyncFrame = new AsyncContextFrame(null, null, true);
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return rootAsyncFrame;
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}
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static current() {
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if (asyncContextStack.length === 0) {
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return AsyncContextFrame.getRootAsyncContext();
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}
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return asyncContextStack[asyncContextStack.length - 1];
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}
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static create(
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maybeParent?: AsyncContextFrame | null,
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maybeStorageEntry?: StorageEntry | null,
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) {
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return new AsyncContextFrame(maybeParent, maybeStorageEntry);
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}
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static wrap(
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fn: () => unknown,
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maybeFrame: AsyncContextFrame | undefined,
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// deno-lint-ignore no-explicit-any
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thisArg: any,
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) {
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// deno-lint-ignore no-explicit-any
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return (...args: any) => {
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const frame = maybeFrame || AsyncContextFrame.current();
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Scope.enter(frame);
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try {
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return fn.apply(thisArg, args);
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} finally {
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Scope.exit();
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}
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};
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}
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get(key: StorageKey) {
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assert(!key.isDead());
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this.storage = this.storage.filter((entry) => !entry.key.isDead());
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const entry = this.storage.find((entry) => entry.key === key);
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if (entry) {
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return entry.value;
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}
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return undefined;
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}
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isRoot() {
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return AsyncContextFrame.getRootAsyncContext() == this;
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}
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}
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const {
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ObjectDefineProperties,
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ReflectApply,
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FunctionPrototypeBind,
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ArrayPrototypeUnshift,
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ObjectFreeze,
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} = primordials;
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export class AsyncResource {
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frame: AsyncContextFrame;
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type: string;
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#snapshot: unknown;
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#asyncId: number;
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constructor(type: string) {
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this.type = type;
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this.frame = AsyncContextFrame.current();
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this.#snapshot = getAsyncContext();
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this.#asyncId = newAsyncId();
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}
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@ -198,35 +41,38 @@ export class AsyncResource {
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thisArg: unknown,
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...args: unknown[]
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) {
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Scope.enter(this.frame);
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const previousContext = getAsyncContext();
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try {
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return fn.apply(thisArg, args);
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setAsyncContext(this.#snapshot);
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return ReflectApply(fn, thisArg, args);
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} finally {
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Scope.exit();
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setAsyncContext(previousContext);
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}
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}
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emitDestroy() {}
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bind(fn: (...args: unknown[]) => unknown, thisArg = this) {
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bind(fn: (...args: unknown[]) => unknown, thisArg) {
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validateFunction(fn, "fn");
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const frame = AsyncContextFrame.current();
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const bound = AsyncContextFrame.wrap(fn, frame, thisArg);
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Object.defineProperties(bound, {
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let bound;
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if (thisArg === undefined) {
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// deno-lint-ignore no-this-alias
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const resource = this;
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bound = function (...args) {
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ArrayPrototypeUnshift(args, fn, this);
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return ReflectApply(resource.runInAsyncScope, resource, args);
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};
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} else {
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bound = FunctionPrototypeBind(this.runInAsyncScope, this, fn, thisArg);
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}
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ObjectDefineProperties(bound, {
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"length": {
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__proto__: null,
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configurable: true,
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enumerable: false,
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value: fn.length,
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writable: false,
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},
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"asyncResource": {
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configurable: true,
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enumerable: true,
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value: this,
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writable: true,
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},
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});
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return bound;
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}
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@ -236,95 +82,54 @@ export class AsyncResource {
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type?: string,
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thisArg?: AsyncResource,
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) {
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type = type || fn.name;
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return (new AsyncResource(type || "AsyncResource")).bind(fn, thisArg);
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type = type || fn.name || "bound-anonymous-fn";
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return (new AsyncResource(type)).bind(fn, thisArg);
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}
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}
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class Scope {
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static enter(maybeFrame?: AsyncContextFrame) {
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if (maybeFrame) {
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pushAsyncFrame(maybeFrame);
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} else {
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pushAsyncFrame(AsyncContextFrame.getRootAsyncContext());
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}
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}
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static exit() {
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popAsyncFrame();
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}
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}
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class StorageEntry {
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key: StorageKey;
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value: unknown;
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constructor(key: StorageKey, value: unknown) {
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this.key = key;
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this.value = value;
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}
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clone() {
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return new StorageEntry(this.key, this.value);
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}
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}
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class StorageKey {
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#dead = false;
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reset() {
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this.#dead = true;
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}
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isDead() {
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return this.#dead;
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}
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}
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const fnReg = new FinalizationRegistry((key: StorageKey) => {
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key.reset();
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});
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export class AsyncLocalStorage {
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#key;
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constructor() {
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this.#key = new StorageKey();
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fnReg.register(this, this.#key);
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}
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#variable = new AsyncVariable();
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enabled = false;
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// deno-lint-ignore no-explicit-any
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run(store: any, callback: any, ...args: any[]): any {
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const frame = AsyncContextFrame.create(
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null,
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new StorageEntry(this.#key, store),
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);
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Scope.enter(frame);
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let res;
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this.enabled = true;
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const previous = this.#variable.enter(store);
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try {
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res = callback(...args);
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return ReflectApply(callback, null, args);
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} finally {
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Scope.exit();
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setAsyncContext(previous);
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}
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return res;
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}
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// deno-lint-ignore no-explicit-any
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exit(callback: (...args: unknown[]) => any, ...args: any[]): any {
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return this.run(undefined, callback, args);
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if (!this.enabled) {
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return ReflectApply(callback, null, args);
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}
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this.enabled = false;
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try {
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return ReflectApply(callback, null, args);
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} finally {
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this.enabled = true;
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}
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}
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|
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// deno-lint-ignore no-explicit-any
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getStore(): any {
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const currentFrame = AsyncContextFrame.current();
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return currentFrame.get(this.#key);
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if (!this.enabled) {
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return undefined;
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}
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return this.#variable.get();
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}
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enterWith(store: unknown) {
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const frame = AsyncContextFrame.create(
|
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null,
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new StorageEntry(this.#key, store),
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);
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Scope.enter(frame);
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this.enabled = true;
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this.#variable.enter(store);
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}
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disable() {
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this.enabled = false;
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||||
}
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||||
|
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static bind(fn: (...args: unknown[]) => unknown) {
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|
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@ -335,14 +140,24 @@ export class AsyncLocalStorage {
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return AsyncLocalStorage.bind((
|
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cb: (...args: unknown[]) => unknown,
|
||||
...args: unknown[]
|
||||
) => cb(...args));
|
||||
) => ReflectApply(cb, null, args));
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||||
}
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||||
}
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||||
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||||
export function executionAsyncId() {
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return 1;
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return 0;
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||||
}
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export function triggerAsyncId() {
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return 0;
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}
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|
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export function executionAsyncResource() {
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return {};
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||||
}
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export const asyncWrapProviders = ObjectFreeze({ __proto__: null });
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|
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class AsyncHook {
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enable() {
|
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}
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|
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@ -355,12 +170,12 @@ export function createHook() {
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return new AsyncHook();
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}
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// Placing all exports down here because the exported classes won't export
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||||
// otherwise.
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||||
export default {
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// Embedder API
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AsyncResource,
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executionAsyncId,
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createHook,
|
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AsyncLocalStorage,
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createHook,
|
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executionAsyncId,
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triggerAsyncId,
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executionAsyncResource,
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asyncWrapProviders,
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||||
AsyncResource,
|
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};
|
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|
|
|
|||
|
|
@ -2,6 +2,10 @@
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|||
|
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import { core, primordials } from "ext:core/mod.js";
|
||||
import { op_defer, op_now } from "ext:core/ops";
|
||||
import {
|
||||
getAsyncContext,
|
||||
setAsyncContext,
|
||||
} from "ext:runtime/01_async_context.js";
|
||||
const {
|
||||
Uint8Array,
|
||||
Uint32Array,
|
||||
|
|
@ -33,14 +37,16 @@ function checkThis(thisArg) {
|
|||
* Call a callback function immediately.
|
||||
*/
|
||||
function setImmediate(callback, ...args) {
|
||||
if (args.length > 0) {
|
||||
const unboundCallback = callback;
|
||||
callback = () => ReflectApply(unboundCallback, globalThis, args);
|
||||
const asyncContext = getAsyncContext();
|
||||
return core.queueImmediate(() => {
|
||||
const oldContext = getAsyncContext();
|
||||
try {
|
||||
setAsyncContext(asyncContext);
|
||||
return ReflectApply(callback, globalThis, args);
|
||||
} finally {
|
||||
setAsyncContext(oldContext);
|
||||
}
|
||||
|
||||
return core.queueImmediate(
|
||||
callback,
|
||||
);
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -53,10 +59,17 @@ function setTimeout(callback, timeout = 0, ...args) {
|
|||
const unboundCallback = webidl.converters.DOMString(callback);
|
||||
callback = () => indirectEval(unboundCallback);
|
||||
}
|
||||
if (args.length > 0) {
|
||||
const unboundCallback = callback;
|
||||
callback = () => ReflectApply(unboundCallback, globalThis, args);
|
||||
const asyncContext = getAsyncContext();
|
||||
callback = () => {
|
||||
const oldContext = getAsyncContext();
|
||||
try {
|
||||
setAsyncContext(asyncContext);
|
||||
ReflectApply(unboundCallback, globalThis, args);
|
||||
} finally {
|
||||
setAsyncContext(oldContext);
|
||||
}
|
||||
};
|
||||
timeout = webidl.converters.long(timeout);
|
||||
return core.queueUserTimer(
|
||||
core.getTimerDepth() + 1,
|
||||
|
|
@ -75,10 +88,17 @@ function setInterval(callback, timeout = 0, ...args) {
|
|||
const unboundCallback = webidl.converters.DOMString(callback);
|
||||
callback = () => indirectEval(unboundCallback);
|
||||
}
|
||||
if (args.length > 0) {
|
||||
const unboundCallback = callback;
|
||||
callback = () => ReflectApply(unboundCallback, globalThis, args);
|
||||
const asyncContext = getAsyncContext();
|
||||
callback = () => {
|
||||
const oldContext = getAsyncContext(asyncContext);
|
||||
try {
|
||||
setAsyncContext(asyncContext);
|
||||
ReflectApply(unboundCallback, globalThis, args);
|
||||
} finally {
|
||||
setAsyncContext(oldContext);
|
||||
}
|
||||
};
|
||||
timeout = webidl.converters.long(timeout);
|
||||
return core.queueUserTimer(
|
||||
core.getTimerDepth() + 1,
|
||||
|
|
|
|||
45
runtime/js/01_async_context.js
Normal file
45
runtime/js/01_async_context.js
Normal file
|
|
@ -0,0 +1,45 @@
|
|||
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
|
||||
|
||||
import { primordials } from "ext:core/mod.js";
|
||||
import { op_get_extras_binding_object } from "ext:core/ops";
|
||||
|
||||
const {
|
||||
SafeWeakMap,
|
||||
} = primordials;
|
||||
|
||||
const {
|
||||
getContinuationPreservedEmbedderData,
|
||||
setContinuationPreservedEmbedderData,
|
||||
} = op_get_extras_binding_object();
|
||||
|
||||
let counter = 0;
|
||||
|
||||
export const getAsyncContext = getContinuationPreservedEmbedderData;
|
||||
export const setAsyncContext = setContinuationPreservedEmbedderData;
|
||||
|
||||
export class AsyncVariable {
|
||||
#id = counter++;
|
||||
#data = new SafeWeakMap();
|
||||
|
||||
enter(value) {
|
||||
const previousContextMapping = getAsyncContext();
|
||||
const entry = { id: this.#id };
|
||||
const asyncContextMapping = {
|
||||
__proto__: null,
|
||||
...previousContextMapping,
|
||||
[this.#id]: entry,
|
||||
};
|
||||
this.#data.set(entry, value);
|
||||
setAsyncContext(asyncContextMapping);
|
||||
return previousContextMapping;
|
||||
}
|
||||
|
||||
get() {
|
||||
const current = getAsyncContext();
|
||||
const entry = current?.[this.#id];
|
||||
if (entry) {
|
||||
return this.#data.get(entry);
|
||||
}
|
||||
return undefined;
|
||||
}
|
||||
}
|
||||
|
|
@ -2,13 +2,14 @@
|
|||
|
||||
use deno_core::error::AnyError;
|
||||
use deno_core::op2;
|
||||
use deno_core::v8;
|
||||
use deno_core::ModuleSpecifier;
|
||||
use deno_core::OpState;
|
||||
use deno_permissions::PermissionsContainer;
|
||||
|
||||
deno_core::extension!(
|
||||
deno_runtime,
|
||||
ops = [op_main_module, op_ppid],
|
||||
ops = [op_main_module, op_ppid, op_get_extras_binding_object],
|
||||
options = { main_module: ModuleSpecifier },
|
||||
state = |state, options| {
|
||||
state.put::<ModuleSpecifier>(options.main_module);
|
||||
|
|
@ -94,3 +95,11 @@ pub fn op_ppid() -> i64 {
|
|||
parent_id().into()
|
||||
}
|
||||
}
|
||||
|
||||
#[op2]
|
||||
pub fn op_get_extras_binding_object<'a>(
|
||||
scope: &mut v8::HandleScope<'a>,
|
||||
) -> v8::Local<'a, v8::Value> {
|
||||
let context = scope.get_current_context();
|
||||
context.get_extras_binding_object(scope).into()
|
||||
}
|
||||
|
|
|
|||
|
|
@ -38,6 +38,7 @@ extension!(runtime,
|
|||
dir "js",
|
||||
"01_errors.js",
|
||||
"01_version.ts",
|
||||
"01_async_context.js",
|
||||
"06_util.js",
|
||||
"10_permissions.js",
|
||||
"11_workers.js",
|
||||
|
|
|
|||
|
|
@ -1,5 +1,7 @@
|
|||
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
|
||||
import { AsyncLocalStorage, AsyncResource } from "node:async_hooks";
|
||||
import process from "node:process";
|
||||
import { setImmediate } from "node:timers";
|
||||
import { assert, assertEquals } from "@std/assert";
|
||||
|
||||
Deno.test(async function foo() {
|
||||
|
|
@ -92,7 +94,7 @@ Deno.test(async function enterWith() {
|
|||
});
|
||||
|
||||
assertEquals(await deferred.promise, { x: 2 });
|
||||
assertEquals(await deferred1.promise, { x: 1 });
|
||||
assertEquals(await deferred1.promise, null);
|
||||
});
|
||||
|
||||
Deno.test(async function snapshot() {
|
||||
|
|
@ -135,3 +137,26 @@ Deno.test(function emitDestroyStub() {
|
|||
const resource = new AsyncResource("foo");
|
||||
assert(typeof resource.emitDestroy === "function");
|
||||
});
|
||||
|
||||
Deno.test(async function worksWithAsyncAPIs() {
|
||||
const store = new AsyncLocalStorage();
|
||||
const test = () => assertEquals(store.getStore(), "data");
|
||||
await store.run("data", async () => {
|
||||
test();
|
||||
queueMicrotask(() => test());
|
||||
process.nextTick(() => test());
|
||||
setImmediate(() => test());
|
||||
setTimeout(() => test(), 0);
|
||||
const intervalId = setInterval(() => {
|
||||
test();
|
||||
clearInterval(intervalId);
|
||||
}, 0);
|
||||
|
||||
store.run("data2", () => {
|
||||
assertEquals(store.getStore(), "data2");
|
||||
});
|
||||
|
||||
await new Promise((r) => setTimeout(r, 50));
|
||||
test();
|
||||
});
|
||||
});
|
||||
|
|
|
|||
Loading…
Reference in a new issue