mirror of
https://github.com/denoland/deno.git
synced 2024-12-29 02:29:06 -05:00
0768f8d369
This commit moves bulk of the logic related to module loading from "JsRuntime" to "ModuleMap". Next steps are to rewrite the actual loading logic (represented by "RecursiveModuleLoad") to be a part of "ModuleMap" as well -- that way we will be able to track multiple module loads from within the map which should help me solve the problem of concurrent loads (since all info about currently loading/loaded modules will be contained in the ModuleMap, so we'll be able to know if actually all required modules have been loaded).
1932 lines
60 KiB
Rust
1932 lines
60 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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use rusty_v8 as v8;
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use crate::bindings;
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use crate::error::attach_handle_to_error;
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use crate::error::generic_error;
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use crate::error::AnyError;
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use crate::error::ErrWithV8Handle;
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use crate::error::JsError;
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use crate::module_specifier::ModuleSpecifier;
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use crate::modules::ModuleId;
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use crate::modules::ModuleLoadId;
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use crate::modules::ModuleLoader;
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use crate::modules::ModuleMap;
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use crate::modules::NoopModuleLoader;
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use crate::ops::*;
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use crate::Extension;
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use crate::OpMiddlewareFn;
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use crate::OpPayload;
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use crate::OpResult;
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use crate::OpState;
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use crate::PromiseId;
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use futures::channel::mpsc;
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use futures::future::poll_fn;
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use futures::stream::FuturesUnordered;
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use futures::stream::StreamExt;
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use futures::task::AtomicWaker;
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use futures::Future;
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use std::any::Any;
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use std::cell::RefCell;
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use std::collections::HashMap;
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use std::collections::VecDeque;
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use std::convert::TryFrom;
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use std::ffi::c_void;
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use std::mem::forget;
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use std::option::Option;
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use std::pin::Pin;
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use std::rc::Rc;
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use std::sync::Once;
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use std::task::Context;
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use std::task::Poll;
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type PendingOpFuture = Pin<Box<dyn Future<Output = (PromiseId, OpResult)>>>;
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pub enum Snapshot {
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Static(&'static [u8]),
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JustCreated(v8::StartupData),
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Boxed(Box<[u8]>),
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}
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pub type JsErrorCreateFn = dyn Fn(JsError) -> AnyError;
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pub type GetErrorClassFn =
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&'static dyn for<'e> Fn(&'e AnyError) -> &'static str;
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/// Objects that need to live as long as the isolate
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#[derive(Default)]
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struct IsolateAllocations {
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near_heap_limit_callback_data:
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Option<(Box<RefCell<dyn Any>>, v8::NearHeapLimitCallback)>,
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}
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/// A single execution context of JavaScript. Corresponds roughly to the "Web
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/// Worker" concept in the DOM. A JsRuntime is a Future that can be used with
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/// an event loop (Tokio, async_std).
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////
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/// The JsRuntime future completes when there is an error or when all
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/// pending ops have completed.
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///
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/// Pending ops are created in JavaScript by calling Deno.core.opAsync(), and in Rust
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/// by implementing an async function that takes a serde::Deserialize "control argument"
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/// and an optional zero copy buffer, each async Op is tied to a Promise in JavaScript.
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pub struct JsRuntime {
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// This is an Option<OwnedIsolate> instead of just OwnedIsolate to workaround
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// an safety issue with SnapshotCreator. See JsRuntime::drop.
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v8_isolate: Option<v8::OwnedIsolate>,
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snapshot_creator: Option<v8::SnapshotCreator>,
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has_snapshotted: bool,
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allocations: IsolateAllocations,
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extensions: Vec<Extension>,
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}
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struct DynImportModEvaluate {
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load_id: ModuleLoadId,
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module_id: ModuleId,
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promise: v8::Global<v8::Promise>,
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module: v8::Global<v8::Module>,
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}
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struct ModEvaluate {
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promise: v8::Global<v8::Promise>,
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sender: mpsc::Sender<Result<(), AnyError>>,
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}
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/// Internal state for JsRuntime which is stored in one of v8::Isolate's
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/// embedder slots.
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pub(crate) struct JsRuntimeState {
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pub global_context: Option<v8::Global<v8::Context>>,
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pub(crate) js_recv_cb: Option<v8::Global<v8::Function>>,
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pub(crate) js_macrotask_cb: Option<v8::Global<v8::Function>>,
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pub(crate) pending_promise_exceptions:
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HashMap<v8::Global<v8::Promise>, v8::Global<v8::Value>>,
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pending_dyn_mod_evaluate: VecDeque<DynImportModEvaluate>,
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pending_mod_evaluate: Option<ModEvaluate>,
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pub(crate) js_error_create_fn: Rc<JsErrorCreateFn>,
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pub(crate) pending_ops: FuturesUnordered<PendingOpFuture>,
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pub(crate) pending_unref_ops: FuturesUnordered<PendingOpFuture>,
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pub(crate) have_unpolled_ops: bool,
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pub(crate) op_state: Rc<RefCell<OpState>>,
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waker: AtomicWaker,
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}
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impl Drop for JsRuntime {
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fn drop(&mut self) {
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if let Some(creator) = self.snapshot_creator.take() {
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// TODO(ry): in rusty_v8, `SnapShotCreator::get_owned_isolate()` returns
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// a `struct OwnedIsolate` which is not actually owned, hence the need
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// here to leak the `OwnedIsolate` in order to avoid a double free and
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// the segfault that it causes.
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let v8_isolate = self.v8_isolate.take().unwrap();
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forget(v8_isolate);
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// TODO(ry) V8 has a strange assert which prevents a SnapshotCreator from
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// being deallocated if it hasn't created a snapshot yet.
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// https://github.com/v8/v8/blob/73212783fbd534fac76cc4b66aac899c13f71fc8/src/api.cc#L603
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// If that assert is removed, this if guard could be removed.
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// WARNING: There may be false positive LSAN errors here.
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if self.has_snapshotted {
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drop(creator);
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}
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}
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}
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}
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fn v8_init(v8_platform: Option<v8::UniquePtr<v8::Platform>>) {
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// Include 10MB ICU data file.
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#[repr(C, align(16))]
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struct IcuData([u8; 10413584]);
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static ICU_DATA: IcuData = IcuData(*include_bytes!("icudtl.dat"));
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v8::icu::set_common_data(&ICU_DATA.0).unwrap();
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let v8_platform = v8_platform
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.unwrap_or_else(v8::new_default_platform)
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.unwrap();
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v8::V8::initialize_platform(v8_platform);
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v8::V8::initialize();
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let flags = concat!(
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// TODO(ry) This makes WASM compile synchronously. Eventually we should
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// remove this to make it work asynchronously too. But that requires getting
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// PumpMessageLoop and RunMicrotasks setup correctly.
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// See https://github.com/denoland/deno/issues/2544
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" --experimental-wasm-threads",
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" --no-wasm-async-compilation",
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" --harmony-top-level-await",
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" --harmony-import-assertions",
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" --no-validate-asm",
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);
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v8::V8::set_flags_from_string(flags);
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}
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#[derive(Default)]
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pub struct RuntimeOptions {
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/// Allows a callback to be set whenever a V8 exception is made. This allows
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/// the caller to wrap the JsError into an error. By default this callback
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/// is set to `JsError::create()`.
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pub js_error_create_fn: Option<Rc<JsErrorCreateFn>>,
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/// Allows to map error type to a string "class" used to represent
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/// error in JavaScript.
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pub get_error_class_fn: Option<GetErrorClassFn>,
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/// Implementation of `ModuleLoader` which will be
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/// called when V8 requests to load ES modules.
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///
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/// If not provided runtime will error if code being
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/// executed tries to load modules.
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pub module_loader: Option<Rc<dyn ModuleLoader>>,
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/// JsRuntime extensions, not to be confused with ES modules
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/// these are sets of ops and other JS code to be initialized.
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pub extensions: Vec<Extension>,
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/// V8 snapshot that should be loaded on startup.
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///
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/// Currently can't be used with `will_snapshot`.
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pub startup_snapshot: Option<Snapshot>,
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/// Prepare runtime to take snapshot of loaded code.
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///
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/// Currently can't be used with `startup_snapshot`.
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pub will_snapshot: bool,
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/// Isolate creation parameters.
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pub create_params: Option<v8::CreateParams>,
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/// V8 platform instance to use. Used when Deno initializes V8
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/// (which it only does once), otherwise it's silenty dropped.
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pub v8_platform: Option<v8::UniquePtr<v8::Platform>>,
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}
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impl JsRuntime {
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/// Only constructor, configuration is done through `options`.
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pub fn new(mut options: RuntimeOptions) -> Self {
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let v8_platform = options.v8_platform.take();
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static DENO_INIT: Once = Once::new();
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DENO_INIT.call_once(move || v8_init(v8_platform));
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let has_startup_snapshot = options.startup_snapshot.is_some();
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let global_context;
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let (mut isolate, maybe_snapshot_creator) = if options.will_snapshot {
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// TODO(ry) Support loading snapshots before snapshotting.
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assert!(options.startup_snapshot.is_none());
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let mut creator =
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v8::SnapshotCreator::new(Some(&bindings::EXTERNAL_REFERENCES));
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let isolate = unsafe { creator.get_owned_isolate() };
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let mut isolate = JsRuntime::setup_isolate(isolate);
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{
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let scope = &mut v8::HandleScope::new(&mut isolate);
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let context = bindings::initialize_context(scope);
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global_context = v8::Global::new(scope, context);
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creator.set_default_context(context);
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}
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(isolate, Some(creator))
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} else {
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let mut params = options
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.create_params
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.take()
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.unwrap_or_else(v8::Isolate::create_params)
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.external_references(&**bindings::EXTERNAL_REFERENCES);
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let snapshot_loaded = if let Some(snapshot) = options.startup_snapshot {
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params = match snapshot {
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Snapshot::Static(data) => params.snapshot_blob(data),
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Snapshot::JustCreated(data) => params.snapshot_blob(data),
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Snapshot::Boxed(data) => params.snapshot_blob(data),
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};
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true
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} else {
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false
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};
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let isolate = v8::Isolate::new(params);
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let mut isolate = JsRuntime::setup_isolate(isolate);
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{
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let scope = &mut v8::HandleScope::new(&mut isolate);
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let context = if snapshot_loaded {
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v8::Context::new(scope)
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} else {
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// If no snapshot is provided, we initialize the context with empty
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// main source code and source maps.
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bindings::initialize_context(scope)
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};
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global_context = v8::Global::new(scope, context);
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}
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(isolate, None)
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};
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let loader = options
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.module_loader
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.unwrap_or_else(|| Rc::new(NoopModuleLoader));
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let js_error_create_fn = options
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.js_error_create_fn
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.unwrap_or_else(|| Rc::new(JsError::create));
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let mut op_state = OpState::new();
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if let Some(get_error_class_fn) = options.get_error_class_fn {
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op_state.get_error_class_fn = get_error_class_fn;
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}
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let op_state = Rc::new(RefCell::new(op_state));
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isolate.set_slot(Rc::new(RefCell::new(JsRuntimeState {
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global_context: Some(global_context),
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pending_promise_exceptions: HashMap::new(),
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pending_dyn_mod_evaluate: VecDeque::new(),
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pending_mod_evaluate: None,
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js_recv_cb: None,
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js_macrotask_cb: None,
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js_error_create_fn,
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pending_ops: FuturesUnordered::new(),
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pending_unref_ops: FuturesUnordered::new(),
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op_state: op_state.clone(),
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have_unpolled_ops: false,
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waker: AtomicWaker::new(),
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})));
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let module_map = ModuleMap::new(loader, op_state);
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isolate.set_slot(Rc::new(RefCell::new(module_map)));
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// Add builtins extension
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options
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.extensions
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.insert(0, crate::ops_builtin::init_builtins());
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let mut js_runtime = Self {
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v8_isolate: Some(isolate),
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snapshot_creator: maybe_snapshot_creator,
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has_snapshotted: false,
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allocations: IsolateAllocations::default(),
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extensions: options.extensions,
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};
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// TODO(@AaronO): diff extensions inited in snapshot and those provided
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// for now we assume that snapshot and extensions always match
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if !has_startup_snapshot {
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js_runtime.init_extension_js().unwrap();
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}
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// Init extension ops
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js_runtime.init_extension_ops().unwrap();
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js_runtime.sync_ops_cache();
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// Init async ops callback
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js_runtime.init_recv_cb();
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js_runtime
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}
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pub fn global_context(&mut self) -> v8::Global<v8::Context> {
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let state = Self::state(self.v8_isolate());
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let state = state.borrow();
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state.global_context.clone().unwrap()
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}
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pub fn v8_isolate(&mut self) -> &mut v8::OwnedIsolate {
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self.v8_isolate.as_mut().unwrap()
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}
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pub fn handle_scope(&mut self) -> v8::HandleScope {
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let context = self.global_context();
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v8::HandleScope::with_context(self.v8_isolate(), context)
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}
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fn setup_isolate(mut isolate: v8::OwnedIsolate) -> v8::OwnedIsolate {
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isolate.set_capture_stack_trace_for_uncaught_exceptions(true, 10);
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isolate.set_promise_reject_callback(bindings::promise_reject_callback);
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isolate.set_host_initialize_import_meta_object_callback(
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bindings::host_initialize_import_meta_object_callback,
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);
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isolate.set_host_import_module_dynamically_callback(
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bindings::host_import_module_dynamically_callback,
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);
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isolate
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}
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pub(crate) fn state(isolate: &v8::Isolate) -> Rc<RefCell<JsRuntimeState>> {
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let s = isolate.get_slot::<Rc<RefCell<JsRuntimeState>>>().unwrap();
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s.clone()
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}
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pub(crate) fn module_map(isolate: &v8::Isolate) -> Rc<RefCell<ModuleMap>> {
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let module_map = isolate.get_slot::<Rc<RefCell<ModuleMap>>>().unwrap();
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module_map.clone()
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}
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/// Initializes JS of provided Extensions
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fn init_extension_js(&mut self) -> Result<(), AnyError> {
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// Take extensions to avoid double-borrow
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let mut extensions: Vec<Extension> = std::mem::take(&mut self.extensions);
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for m in extensions.iter_mut() {
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let js_files = m.init_js();
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for (filename, source) in js_files {
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// TODO(@AaronO): use JsRuntime::execute_static() here to move src off heap
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self.execute(filename, source)?;
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}
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}
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// Restore extensions
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self.extensions = extensions;
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Ok(())
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}
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/// Initializes ops of provided Extensions
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fn init_extension_ops(&mut self) -> Result<(), AnyError> {
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let op_state = self.op_state();
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// Take extensions to avoid double-borrow
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let mut extensions: Vec<Extension> = std::mem::take(&mut self.extensions);
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// Middleware
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let middleware: Vec<Box<OpMiddlewareFn>> = extensions
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.iter_mut()
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.filter_map(|e| e.init_middleware())
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.collect();
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// macroware wraps an opfn in all the middleware
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let macroware =
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move |name, opfn| middleware.iter().fold(opfn, |opfn, m| m(name, opfn));
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// Register ops
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for e in extensions.iter_mut() {
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e.init_state(&mut op_state.borrow_mut())?;
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// Register each op after middlewaring it
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let ops = e.init_ops().unwrap_or_default();
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for (name, opfn) in ops {
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self.register_op(name, macroware(name, opfn));
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}
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}
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// Sync ops cache
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self.sync_ops_cache();
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// Restore extensions
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self.extensions = extensions;
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Ok(())
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}
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/// Grabs a reference to core.js' handleAsyncMsgFromRust
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fn init_recv_cb(&mut self) {
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let scope = &mut self.handle_scope();
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// Get Deno.core.handleAsyncMsgFromRust
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let code =
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v8::String::new(scope, "Deno.core.handleAsyncMsgFromRust").unwrap();
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let script = v8::Script::compile(scope, code, None).unwrap();
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let v8_value = script.run(scope).unwrap();
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// Put global handle in state.js_recv_cb
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let state_rc = JsRuntime::state(scope);
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let mut state = state_rc.borrow_mut();
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let cb = v8::Local::<v8::Function>::try_from(v8_value).unwrap();
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state.js_recv_cb.replace(v8::Global::new(scope, cb));
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}
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/// Ensures core.js has the latest op-name to op-id mappings
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pub fn sync_ops_cache(&mut self) {
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self.execute("<anon>", "Deno.core.syncOpsCache()").unwrap()
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}
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/// Returns the runtime's op state, which can be used to maintain ops
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/// and access resources between op calls.
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pub fn op_state(&mut self) -> Rc<RefCell<OpState>> {
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let state_rc = Self::state(self.v8_isolate());
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let state = state_rc.borrow();
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state.op_state.clone()
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}
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/// Executes traditional JavaScript code (traditional = not ES modules)
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///
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/// The execution takes place on the current global context, so it is possible
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/// to maintain local JS state and invoke this method multiple times.
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///
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/// `AnyError` can be downcast to a type that exposes additional information
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/// about the V8 exception. By default this type is `JsError`, however it may
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/// be a different type if `RuntimeOptions::js_error_create_fn` has been set.
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pub fn execute(
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&mut self,
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js_filename: &str,
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js_source: &str,
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) -> Result<(), AnyError> {
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let scope = &mut self.handle_scope();
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let source = v8::String::new(scope, js_source).unwrap();
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let name = v8::String::new(scope, js_filename).unwrap();
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let origin = bindings::script_origin(scope, name);
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let tc_scope = &mut v8::TryCatch::new(scope);
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let script = match v8::Script::compile(tc_scope, source, Some(&origin)) {
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Some(script) => script,
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None => {
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let exception = tc_scope.exception().unwrap();
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return exception_to_err_result(tc_scope, exception, false);
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}
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};
|
|
|
|
match script.run(tc_scope) {
|
|
Some(_) => Ok(()),
|
|
None => {
|
|
assert!(tc_scope.has_caught());
|
|
let exception = tc_scope.exception().unwrap();
|
|
exception_to_err_result(tc_scope, exception, false)
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Takes a snapshot. The isolate should have been created with will_snapshot
|
|
/// set to true.
|
|
///
|
|
/// `AnyError` can be downcast to a type that exposes additional information
|
|
/// about the V8 exception. By default this type is `JsError`, however it may
|
|
/// be a different type if `RuntimeOptions::js_error_create_fn` has been set.
|
|
pub fn snapshot(&mut self) -> v8::StartupData {
|
|
assert!(self.snapshot_creator.is_some());
|
|
let state = Self::state(self.v8_isolate());
|
|
|
|
// Note: create_blob() method must not be called from within a HandleScope.
|
|
// TODO(piscisaureus): The rusty_v8 type system should enforce this.
|
|
state.borrow_mut().global_context.take();
|
|
|
|
// Overwrite existing ModuleMap to drop v8::Global handles
|
|
self
|
|
.v8_isolate()
|
|
.set_slot(Rc::new(RefCell::new(ModuleMap::new(
|
|
Rc::new(NoopModuleLoader),
|
|
state.borrow().op_state.clone(),
|
|
))));
|
|
// Drop other v8::Global handles before snapshotting
|
|
std::mem::take(&mut state.borrow_mut().js_recv_cb);
|
|
|
|
let snapshot_creator = self.snapshot_creator.as_mut().unwrap();
|
|
let snapshot = snapshot_creator
|
|
.create_blob(v8::FunctionCodeHandling::Keep)
|
|
.unwrap();
|
|
self.has_snapshotted = true;
|
|
|
|
snapshot
|
|
}
|
|
|
|
/// Registers an op that can be called from JavaScript.
|
|
///
|
|
/// The _op_ mechanism allows to expose Rust functions to the JS runtime,
|
|
/// which can be called using the provided `name`.
|
|
///
|
|
/// This function provides byte-level bindings. To pass data via JSON, the
|
|
/// following functions can be passed as an argument for `op_fn`:
|
|
/// * [op_sync()](fn.op_sync.html)
|
|
/// * [op_async()](fn.op_async.html)
|
|
pub fn register_op<F>(&mut self, name: &str, op_fn: F) -> OpId
|
|
where
|
|
F: Fn(Rc<RefCell<OpState>>, OpPayload) -> Op + 'static,
|
|
{
|
|
Self::state(self.v8_isolate())
|
|
.borrow_mut()
|
|
.op_state
|
|
.borrow_mut()
|
|
.op_table
|
|
.register_op(name, op_fn)
|
|
}
|
|
|
|
/// Registers a callback on the isolate when the memory limits are approached.
|
|
/// Use this to prevent V8 from crashing the process when reaching the limit.
|
|
///
|
|
/// Calls the closure with the current heap limit and the initial heap limit.
|
|
/// The return value of the closure is set as the new limit.
|
|
pub fn add_near_heap_limit_callback<C>(&mut self, cb: C)
|
|
where
|
|
C: FnMut(usize, usize) -> usize + 'static,
|
|
{
|
|
let boxed_cb = Box::new(RefCell::new(cb));
|
|
let data = boxed_cb.as_ptr() as *mut c_void;
|
|
|
|
let prev = self
|
|
.allocations
|
|
.near_heap_limit_callback_data
|
|
.replace((boxed_cb, near_heap_limit_callback::<C>));
|
|
if let Some((_, prev_cb)) = prev {
|
|
self
|
|
.v8_isolate()
|
|
.remove_near_heap_limit_callback(prev_cb, 0);
|
|
}
|
|
|
|
self
|
|
.v8_isolate()
|
|
.add_near_heap_limit_callback(near_heap_limit_callback::<C>, data);
|
|
}
|
|
|
|
pub fn remove_near_heap_limit_callback(&mut self, heap_limit: usize) {
|
|
if let Some((_, cb)) = self.allocations.near_heap_limit_callback_data.take()
|
|
{
|
|
self
|
|
.v8_isolate()
|
|
.remove_near_heap_limit_callback(cb, heap_limit);
|
|
}
|
|
}
|
|
|
|
/// Runs event loop to completion
|
|
///
|
|
/// This future resolves when:
|
|
/// - there are no more pending dynamic imports
|
|
/// - there are no more pending ops
|
|
pub async fn run_event_loop(&mut self) -> Result<(), AnyError> {
|
|
poll_fn(|cx| self.poll_event_loop(cx)).await
|
|
}
|
|
|
|
/// Runs a single tick of event loop
|
|
pub fn poll_event_loop(
|
|
&mut self,
|
|
cx: &mut Context,
|
|
) -> Poll<Result<(), AnyError>> {
|
|
let state_rc = Self::state(self.v8_isolate());
|
|
let module_map_rc = Self::module_map(self.v8_isolate());
|
|
{
|
|
let state = state_rc.borrow();
|
|
state.waker.register(cx.waker());
|
|
}
|
|
|
|
// Ops
|
|
{
|
|
let async_responses = self.poll_pending_ops(cx);
|
|
self.async_op_response(async_responses)?;
|
|
self.drain_macrotasks()?;
|
|
self.check_promise_exceptions()?;
|
|
}
|
|
|
|
// Dynamic module loading - ie. modules loaded using "import()"
|
|
{
|
|
let poll_imports = self.prepare_dyn_imports(cx)?;
|
|
assert!(poll_imports.is_ready());
|
|
|
|
let poll_imports = self.poll_dyn_imports(cx)?;
|
|
assert!(poll_imports.is_ready());
|
|
|
|
self.evaluate_dyn_imports();
|
|
|
|
self.check_promise_exceptions()?;
|
|
}
|
|
|
|
// Top level module
|
|
self.evaluate_pending_module();
|
|
|
|
let state = state_rc.borrow();
|
|
let module_map = module_map_rc.borrow();
|
|
|
|
let has_pending_ops = !state.pending_ops.is_empty();
|
|
|
|
let has_pending_dyn_imports = module_map.has_pending_dynamic_imports();
|
|
let has_pending_dyn_module_evaluation =
|
|
!state.pending_dyn_mod_evaluate.is_empty();
|
|
let has_pending_module_evaluation = state.pending_mod_evaluate.is_some();
|
|
|
|
if !has_pending_ops
|
|
&& !has_pending_dyn_imports
|
|
&& !has_pending_dyn_module_evaluation
|
|
&& !has_pending_module_evaluation
|
|
{
|
|
return Poll::Ready(Ok(()));
|
|
}
|
|
|
|
// Check if more async ops have been dispatched
|
|
// during this turn of event loop.
|
|
if state.have_unpolled_ops {
|
|
state.waker.wake();
|
|
}
|
|
|
|
if has_pending_module_evaluation {
|
|
if has_pending_ops
|
|
|| has_pending_dyn_imports
|
|
|| has_pending_dyn_module_evaluation
|
|
{
|
|
// pass, will be polled again
|
|
} else {
|
|
let msg = "Module evaluation is still pending but there are no pending ops or dynamic imports. This situation is often caused by unresolved promise.";
|
|
return Poll::Ready(Err(generic_error(msg)));
|
|
}
|
|
}
|
|
|
|
if has_pending_dyn_module_evaluation {
|
|
if has_pending_ops || has_pending_dyn_imports {
|
|
// pass, will be polled again
|
|
} else {
|
|
let mut msg = "Dynamically imported module evaluation is still pending but there are no pending ops. This situation is often caused by unresolved promise.
|
|
Pending dynamic modules:\n".to_string();
|
|
for pending_evaluate in &state.pending_dyn_mod_evaluate {
|
|
let module_info = module_map
|
|
.get_info_by_id(&pending_evaluate.module_id)
|
|
.unwrap();
|
|
msg.push_str(&format!("- {}", module_info.name.as_str()));
|
|
}
|
|
return Poll::Ready(Err(generic_error(msg)));
|
|
}
|
|
}
|
|
|
|
Poll::Pending
|
|
}
|
|
}
|
|
|
|
extern "C" fn near_heap_limit_callback<F>(
|
|
data: *mut c_void,
|
|
current_heap_limit: usize,
|
|
initial_heap_limit: usize,
|
|
) -> usize
|
|
where
|
|
F: FnMut(usize, usize) -> usize,
|
|
{
|
|
let callback = unsafe { &mut *(data as *mut F) };
|
|
callback(current_heap_limit, initial_heap_limit)
|
|
}
|
|
|
|
impl JsRuntimeState {
|
|
/// Called by `bindings::host_import_module_dynamically_callback`
|
|
/// after initiating new dynamic import load.
|
|
pub fn notify_new_dynamic_import(&mut self) {
|
|
// Notify event loop to poll again soon.
|
|
self.waker.wake();
|
|
}
|
|
}
|
|
|
|
pub(crate) fn exception_to_err_result<'s, T>(
|
|
scope: &mut v8::HandleScope<'s>,
|
|
exception: v8::Local<v8::Value>,
|
|
in_promise: bool,
|
|
) -> Result<T, AnyError> {
|
|
let is_terminating_exception = scope.is_execution_terminating();
|
|
let mut exception = exception;
|
|
|
|
if is_terminating_exception {
|
|
// TerminateExecution was called. Cancel exception termination so that the
|
|
// exception can be created..
|
|
scope.cancel_terminate_execution();
|
|
|
|
// Maybe make a new exception object.
|
|
if exception.is_null_or_undefined() {
|
|
let message = v8::String::new(scope, "execution terminated").unwrap();
|
|
exception = v8::Exception::error(scope, message);
|
|
}
|
|
}
|
|
|
|
let mut js_error = JsError::from_v8_exception(scope, exception);
|
|
if in_promise {
|
|
js_error.message = format!(
|
|
"Uncaught (in promise) {}",
|
|
js_error.message.trim_start_matches("Uncaught ")
|
|
);
|
|
}
|
|
|
|
let state_rc = JsRuntime::state(scope);
|
|
let state = state_rc.borrow();
|
|
let js_error = (state.js_error_create_fn)(js_error);
|
|
|
|
if is_terminating_exception {
|
|
// Re-enable exception termination.
|
|
scope.terminate_execution();
|
|
}
|
|
|
|
Err(js_error)
|
|
}
|
|
|
|
// Related to module loading
|
|
impl JsRuntime {
|
|
pub(crate) fn instantiate_module(
|
|
&mut self,
|
|
id: ModuleId,
|
|
) -> Result<(), AnyError> {
|
|
let module_map_rc = Self::module_map(self.v8_isolate());
|
|
let scope = &mut self.handle_scope();
|
|
let tc_scope = &mut v8::TryCatch::new(scope);
|
|
|
|
let module = module_map_rc
|
|
.borrow()
|
|
.get_handle(id)
|
|
.map(|handle| v8::Local::new(tc_scope, handle))
|
|
.expect("ModuleInfo not found");
|
|
|
|
if module.get_status() == v8::ModuleStatus::Errored {
|
|
let exception = module.get_exception();
|
|
let err = exception_to_err_result(tc_scope, exception, false)
|
|
.map_err(|err| attach_handle_to_error(tc_scope, err, exception));
|
|
return err;
|
|
}
|
|
|
|
// IMPORTANT: No borrows to `ModuleMap` can be held at this point because
|
|
// `module_resolve_callback` will be calling into `ModuleMap` from within
|
|
// the isolate.
|
|
let instantiate_result =
|
|
module.instantiate_module(tc_scope, bindings::module_resolve_callback);
|
|
|
|
if instantiate_result.is_none() {
|
|
let exception = tc_scope.exception().unwrap();
|
|
let err = exception_to_err_result(tc_scope, exception, false)
|
|
.map_err(|err| attach_handle_to_error(tc_scope, err, exception));
|
|
return err;
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn dynamic_import_module_evaluate(
|
|
&mut self,
|
|
load_id: ModuleLoadId,
|
|
id: ModuleId,
|
|
) -> Result<(), AnyError> {
|
|
let state_rc = Self::state(self.v8_isolate());
|
|
let module_map_rc = Self::module_map(self.v8_isolate());
|
|
|
|
let module_handle = module_map_rc
|
|
.borrow()
|
|
.get_handle(id)
|
|
.expect("ModuleInfo not found");
|
|
|
|
let status = {
|
|
let scope = &mut self.handle_scope();
|
|
let module = module_handle.get(scope);
|
|
module.get_status()
|
|
};
|
|
|
|
match status {
|
|
v8::ModuleStatus::Instantiated | v8::ModuleStatus::Evaluated => {}
|
|
_ => return Ok(()),
|
|
}
|
|
|
|
// IMPORTANT: Top-level-await is enabled, which means that return value
|
|
// of module evaluation is a promise.
|
|
//
|
|
// This promise is internal, and not the same one that gets returned to
|
|
// the user. We add an empty `.catch()` handler so that it does not result
|
|
// in an exception if it rejects. That will instead happen for the other
|
|
// promise if not handled by the user.
|
|
//
|
|
// For more details see:
|
|
// https://github.com/denoland/deno/issues/4908
|
|
// https://v8.dev/features/top-level-await#module-execution-order
|
|
let scope = &mut self.handle_scope();
|
|
let module = v8::Local::new(scope, &module_handle);
|
|
let maybe_value = module.evaluate(scope);
|
|
|
|
// Update status after evaluating.
|
|
let status = module.get_status();
|
|
|
|
if let Some(value) = maybe_value {
|
|
assert!(
|
|
status == v8::ModuleStatus::Evaluated
|
|
|| status == v8::ModuleStatus::Errored
|
|
);
|
|
let promise = v8::Local::<v8::Promise>::try_from(value)
|
|
.expect("Expected to get promise as module evaluation result");
|
|
let empty_fn = |_scope: &mut v8::HandleScope,
|
|
_args: v8::FunctionCallbackArguments,
|
|
_rv: v8::ReturnValue| {};
|
|
let empty_fn = v8::FunctionTemplate::new(scope, empty_fn);
|
|
let empty_fn = empty_fn.get_function(scope).unwrap();
|
|
promise.catch(scope, empty_fn);
|
|
let mut state = state_rc.borrow_mut();
|
|
let promise_global = v8::Global::new(scope, promise);
|
|
let module_global = v8::Global::new(scope, module);
|
|
|
|
let dyn_import_mod_evaluate = DynImportModEvaluate {
|
|
load_id,
|
|
module_id: id,
|
|
promise: promise_global,
|
|
module: module_global,
|
|
};
|
|
|
|
state
|
|
.pending_dyn_mod_evaluate
|
|
.push_back(dyn_import_mod_evaluate);
|
|
} else {
|
|
assert!(status == v8::ModuleStatus::Errored);
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
// TODO(bartlomieju): make it return `ModuleEvaluationFuture`?
|
|
/// Evaluates an already instantiated ES module.
|
|
///
|
|
/// Returns a receiver handle that resolves when module promise resolves.
|
|
/// Implementors must manually call `run_event_loop()` to drive module
|
|
/// evaluation future.
|
|
///
|
|
/// `AnyError` can be downcast to a type that exposes additional information
|
|
/// about the V8 exception. By default this type is `JsError`, however it may
|
|
/// be a different type if `RuntimeOptions::js_error_create_fn` has been set.
|
|
///
|
|
/// This function panics if module has not been instantiated.
|
|
pub fn mod_evaluate(
|
|
&mut self,
|
|
id: ModuleId,
|
|
) -> mpsc::Receiver<Result<(), AnyError>> {
|
|
let state_rc = Self::state(self.v8_isolate());
|
|
let module_map_rc = Self::module_map(self.v8_isolate());
|
|
let scope = &mut self.handle_scope();
|
|
|
|
let module = module_map_rc
|
|
.borrow()
|
|
.get_handle(id)
|
|
.map(|handle| v8::Local::new(scope, handle))
|
|
.expect("ModuleInfo not found");
|
|
let mut status = module.get_status();
|
|
assert_eq!(status, v8::ModuleStatus::Instantiated);
|
|
|
|
let (sender, receiver) = mpsc::channel(1);
|
|
|
|
// IMPORTANT: Top-level-await is enabled, which means that return value
|
|
// of module evaluation is a promise.
|
|
//
|
|
// Because that promise is created internally by V8, when error occurs during
|
|
// module evaluation the promise is rejected, and since the promise has no rejection
|
|
// handler it will result in call to `bindings::promise_reject_callback` adding
|
|
// the promise to pending promise rejection table - meaning JsRuntime will return
|
|
// error on next poll().
|
|
//
|
|
// This situation is not desirable as we want to manually return error at the
|
|
// end of this function to handle it further. It means we need to manually
|
|
// remove this promise from pending promise rejection table.
|
|
//
|
|
// For more details see:
|
|
// https://github.com/denoland/deno/issues/4908
|
|
// https://v8.dev/features/top-level-await#module-execution-order
|
|
let maybe_value = module.evaluate(scope);
|
|
|
|
// Update status after evaluating.
|
|
status = module.get_status();
|
|
|
|
if let Some(value) = maybe_value {
|
|
assert!(
|
|
status == v8::ModuleStatus::Evaluated
|
|
|| status == v8::ModuleStatus::Errored
|
|
);
|
|
let promise = v8::Local::<v8::Promise>::try_from(value)
|
|
.expect("Expected to get promise as module evaluation result");
|
|
let promise_global = v8::Global::new(scope, promise);
|
|
let mut state = state_rc.borrow_mut();
|
|
state.pending_promise_exceptions.remove(&promise_global);
|
|
let promise_global = v8::Global::new(scope, promise);
|
|
assert!(
|
|
state.pending_mod_evaluate.is_none(),
|
|
"There is already pending top level module evaluation"
|
|
);
|
|
|
|
state.pending_mod_evaluate = Some(ModEvaluate {
|
|
promise: promise_global,
|
|
sender,
|
|
});
|
|
scope.perform_microtask_checkpoint();
|
|
} else {
|
|
assert!(status == v8::ModuleStatus::Errored);
|
|
}
|
|
|
|
receiver
|
|
}
|
|
|
|
fn dynamic_import_reject(&mut self, id: ModuleLoadId, err: AnyError) {
|
|
let module_map_rc = Self::module_map(self.v8_isolate());
|
|
let scope = &mut self.handle_scope();
|
|
|
|
let resolver_handle = module_map_rc
|
|
.borrow_mut()
|
|
.dynamic_import_map
|
|
.remove(&id)
|
|
.expect("Invalid dynamic import id");
|
|
let resolver = resolver_handle.get(scope);
|
|
|
|
let exception = err
|
|
.downcast_ref::<ErrWithV8Handle>()
|
|
.map(|err| err.get_handle(scope))
|
|
.unwrap_or_else(|| {
|
|
let message = err.to_string();
|
|
let message = v8::String::new(scope, &message).unwrap();
|
|
v8::Exception::type_error(scope, message)
|
|
});
|
|
|
|
// IMPORTANT: No borrows to `ModuleMap` can be held at this point because
|
|
// rejecting the promise might initiate another `import()` which will
|
|
// in turn call `bindings::host_import_module_dynamically_callback` which
|
|
// will reach into `ModuleMap` from within the isolate.
|
|
resolver.reject(scope, exception).unwrap();
|
|
scope.perform_microtask_checkpoint();
|
|
}
|
|
|
|
fn dynamic_import_resolve(&mut self, id: ModuleLoadId, mod_id: ModuleId) {
|
|
let module_map_rc = Self::module_map(self.v8_isolate());
|
|
let scope = &mut self.handle_scope();
|
|
|
|
let resolver_handle = module_map_rc
|
|
.borrow_mut()
|
|
.dynamic_import_map
|
|
.remove(&id)
|
|
.expect("Invalid dynamic import id");
|
|
let resolver = resolver_handle.get(scope);
|
|
|
|
let module = {
|
|
module_map_rc
|
|
.borrow()
|
|
.get_handle(mod_id)
|
|
.map(|handle| v8::Local::new(scope, handle))
|
|
.expect("Dyn import module info not found")
|
|
};
|
|
// Resolution success
|
|
assert_eq!(module.get_status(), v8::ModuleStatus::Evaluated);
|
|
|
|
// IMPORTANT: No borrows to `ModuleMap` can be held at this point because
|
|
// resolving the promise might initiate another `import()` which will
|
|
// in turn call `bindings::host_import_module_dynamically_callback` which
|
|
// will reach into `ModuleMap` from within the isolate.
|
|
let module_namespace = module.get_module_namespace();
|
|
resolver.resolve(scope, module_namespace).unwrap();
|
|
scope.perform_microtask_checkpoint();
|
|
}
|
|
|
|
fn prepare_dyn_imports(
|
|
&mut self,
|
|
cx: &mut Context,
|
|
) -> Poll<Result<(), AnyError>> {
|
|
let module_map_rc = Self::module_map(self.v8_isolate());
|
|
|
|
if module_map_rc.borrow().preparing_dynamic_imports.is_empty() {
|
|
return Poll::Ready(Ok(()));
|
|
}
|
|
|
|
loop {
|
|
let poll_result = module_map_rc
|
|
.borrow_mut()
|
|
.preparing_dynamic_imports
|
|
.poll_next_unpin(cx);
|
|
|
|
if let Poll::Ready(Some(prepare_poll)) = poll_result {
|
|
let dyn_import_id = prepare_poll.0;
|
|
let prepare_result = prepare_poll.1;
|
|
|
|
match prepare_result {
|
|
Ok(load) => {
|
|
module_map_rc
|
|
.borrow_mut()
|
|
.pending_dynamic_imports
|
|
.push(load.into_future());
|
|
}
|
|
Err(err) => {
|
|
self.dynamic_import_reject(dyn_import_id, err);
|
|
}
|
|
}
|
|
// Continue polling for more prepared dynamic imports.
|
|
continue;
|
|
}
|
|
|
|
// There are no active dynamic import loads, or none are ready.
|
|
return Poll::Ready(Ok(()));
|
|
}
|
|
}
|
|
|
|
fn poll_dyn_imports(
|
|
&mut self,
|
|
cx: &mut Context,
|
|
) -> Poll<Result<(), AnyError>> {
|
|
let module_map_rc = Self::module_map(self.v8_isolate());
|
|
|
|
if module_map_rc.borrow().pending_dynamic_imports.is_empty() {
|
|
return Poll::Ready(Ok(()));
|
|
}
|
|
|
|
loop {
|
|
let poll_result = module_map_rc
|
|
.borrow_mut()
|
|
.pending_dynamic_imports
|
|
.poll_next_unpin(cx);
|
|
|
|
if let Poll::Ready(Some(load_stream_poll)) = poll_result {
|
|
let maybe_result = load_stream_poll.0;
|
|
let mut load = load_stream_poll.1;
|
|
let dyn_import_id = load.id;
|
|
|
|
if let Some(load_stream_result) = maybe_result {
|
|
match load_stream_result {
|
|
Ok(info) => {
|
|
// A module (not necessarily the one dynamically imported) has been
|
|
// fetched. Create and register it, and if successful, poll for the
|
|
// next recursive-load event related to this dynamic import.
|
|
let register_result =
|
|
module_map_rc.borrow_mut().register_during_load(
|
|
&mut self.handle_scope(),
|
|
info,
|
|
&mut load,
|
|
);
|
|
|
|
match register_result {
|
|
Ok(()) => {
|
|
// Keep importing until it's fully drained
|
|
module_map_rc
|
|
.borrow_mut()
|
|
.pending_dynamic_imports
|
|
.push(load.into_future());
|
|
}
|
|
Err(err) => self.dynamic_import_reject(dyn_import_id, err),
|
|
}
|
|
}
|
|
Err(err) => {
|
|
// A non-javascript error occurred; this could be due to a an invalid
|
|
// module specifier, or a problem with the source map, or a failure
|
|
// to fetch the module source code.
|
|
self.dynamic_import_reject(dyn_import_id, err)
|
|
}
|
|
}
|
|
} else {
|
|
// The top-level module from a dynamic import has been instantiated.
|
|
// Load is done.
|
|
let module_id = load.expect_finished();
|
|
let result = self.instantiate_module(module_id);
|
|
if let Err(err) = result {
|
|
self.dynamic_import_reject(dyn_import_id, err);
|
|
}
|
|
self.dynamic_import_module_evaluate(dyn_import_id, module_id)?;
|
|
}
|
|
|
|
// Continue polling for more ready dynamic imports.
|
|
continue;
|
|
}
|
|
|
|
// There are no active dynamic import loads, or none are ready.
|
|
return Poll::Ready(Ok(()));
|
|
}
|
|
}
|
|
|
|
/// "deno_core" runs V8 with "--harmony-top-level-await"
|
|
/// flag on - it means that each module evaluation returns a promise
|
|
/// from V8.
|
|
///
|
|
/// This promise resolves after all dependent modules have also
|
|
/// resolved. Each dependent module may perform calls to "import()" and APIs
|
|
/// using async ops will add futures to the runtime's event loop.
|
|
/// It means that the promise returned from module evaluation will
|
|
/// resolve only after all futures in the event loop are done.
|
|
///
|
|
/// Thus during turn of event loop we need to check if V8 has
|
|
/// resolved or rejected the promise. If the promise is still pending
|
|
/// then another turn of event loop must be performed.
|
|
fn evaluate_pending_module(&mut self) {
|
|
let state_rc = Self::state(self.v8_isolate());
|
|
|
|
let maybe_module_evaluation =
|
|
state_rc.borrow_mut().pending_mod_evaluate.take();
|
|
|
|
if maybe_module_evaluation.is_none() {
|
|
return;
|
|
}
|
|
|
|
let module_evaluation = maybe_module_evaluation.unwrap();
|
|
let scope = &mut self.handle_scope();
|
|
|
|
let promise = module_evaluation.promise.get(scope);
|
|
let mut sender = module_evaluation.sender.clone();
|
|
let promise_state = promise.state();
|
|
|
|
match promise_state {
|
|
v8::PromiseState::Pending => {
|
|
// NOTE: `poll_event_loop` will decide if
|
|
// runtime would be woken soon
|
|
state_rc.borrow_mut().pending_mod_evaluate = Some(module_evaluation);
|
|
}
|
|
v8::PromiseState::Fulfilled => {
|
|
scope.perform_microtask_checkpoint();
|
|
// Receiver end might have been already dropped, ignore the result
|
|
let _ = sender.try_send(Ok(()));
|
|
}
|
|
v8::PromiseState::Rejected => {
|
|
let exception = promise.result(scope);
|
|
scope.perform_microtask_checkpoint();
|
|
let err1 = exception_to_err_result::<()>(scope, exception, false)
|
|
.map_err(|err| attach_handle_to_error(scope, err, exception))
|
|
.unwrap_err();
|
|
// Receiver end might have been already dropped, ignore the result
|
|
let _ = sender.try_send(Err(err1));
|
|
}
|
|
}
|
|
}
|
|
|
|
fn evaluate_dyn_imports(&mut self) {
|
|
let state_rc = Self::state(self.v8_isolate());
|
|
|
|
loop {
|
|
let maybe_pending_dyn_evaluate =
|
|
state_rc.borrow_mut().pending_dyn_mod_evaluate.pop_front();
|
|
|
|
if maybe_pending_dyn_evaluate.is_none() {
|
|
break;
|
|
}
|
|
|
|
let maybe_result = {
|
|
let scope = &mut self.handle_scope();
|
|
let pending_dyn_evaluate = maybe_pending_dyn_evaluate.unwrap();
|
|
|
|
let module_id = pending_dyn_evaluate.module_id;
|
|
let promise = pending_dyn_evaluate.promise.get(scope);
|
|
let _module = pending_dyn_evaluate.module.get(scope);
|
|
let promise_state = promise.state();
|
|
|
|
match promise_state {
|
|
v8::PromiseState::Pending => {
|
|
state_rc
|
|
.borrow_mut()
|
|
.pending_dyn_mod_evaluate
|
|
.push_back(pending_dyn_evaluate);
|
|
None
|
|
}
|
|
v8::PromiseState::Fulfilled => {
|
|
Some(Ok((pending_dyn_evaluate.load_id, module_id)))
|
|
}
|
|
v8::PromiseState::Rejected => {
|
|
let exception = promise.result(scope);
|
|
let err1 = exception_to_err_result::<()>(scope, exception, false)
|
|
.map_err(|err| attach_handle_to_error(scope, err, exception))
|
|
.unwrap_err();
|
|
Some(Err((pending_dyn_evaluate.load_id, err1)))
|
|
}
|
|
}
|
|
};
|
|
|
|
if let Some(result) = maybe_result {
|
|
match result {
|
|
Ok((dyn_import_id, module_id)) => {
|
|
self.dynamic_import_resolve(dyn_import_id, module_id);
|
|
}
|
|
Err((dyn_import_id, err1)) => {
|
|
self.dynamic_import_reject(dyn_import_id, err1);
|
|
}
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Asynchronously load specified module and all of its dependencies
|
|
///
|
|
/// User must call `JsRuntime::mod_evaluate` with returned `ModuleId`
|
|
/// manually after load is finished.
|
|
pub async fn load_module(
|
|
&mut self,
|
|
specifier: &ModuleSpecifier,
|
|
code: Option<String>,
|
|
) -> Result<ModuleId, AnyError> {
|
|
let module_map_rc = Self::module_map(self.v8_isolate());
|
|
|
|
let load = module_map_rc.borrow().load_main(specifier.as_str(), code);
|
|
|
|
let (_load_id, prepare_result) = load.prepare().await;
|
|
|
|
let mut load = prepare_result?;
|
|
|
|
while let Some(info_result) = load.next().await {
|
|
let info = info_result?;
|
|
let scope = &mut self.handle_scope();
|
|
module_map_rc
|
|
.borrow_mut()
|
|
.register_during_load(scope, info, &mut load)?;
|
|
}
|
|
|
|
let root_id = load.expect_finished();
|
|
self.instantiate_module(root_id).map(|_| root_id)
|
|
}
|
|
|
|
fn poll_pending_ops(
|
|
&mut self,
|
|
cx: &mut Context,
|
|
) -> Vec<(PromiseId, OpResult)> {
|
|
let state_rc = Self::state(self.v8_isolate());
|
|
let mut async_responses: Vec<(PromiseId, OpResult)> = Vec::new();
|
|
|
|
let mut state = state_rc.borrow_mut();
|
|
|
|
// Now handle actual ops.
|
|
state.have_unpolled_ops = false;
|
|
|
|
loop {
|
|
let pending_r = state.pending_ops.poll_next_unpin(cx);
|
|
match pending_r {
|
|
Poll::Ready(None) => break,
|
|
Poll::Pending => break,
|
|
Poll::Ready(Some((promise_id, resp))) => {
|
|
async_responses.push((promise_id, resp));
|
|
}
|
|
};
|
|
}
|
|
|
|
loop {
|
|
let unref_r = state.pending_unref_ops.poll_next_unpin(cx);
|
|
match unref_r {
|
|
Poll::Ready(None) => break,
|
|
Poll::Pending => break,
|
|
Poll::Ready(Some((promise_id, resp))) => {
|
|
async_responses.push((promise_id, resp));
|
|
}
|
|
};
|
|
}
|
|
|
|
async_responses
|
|
}
|
|
|
|
fn check_promise_exceptions(&mut self) -> Result<(), AnyError> {
|
|
let state_rc = Self::state(self.v8_isolate());
|
|
let mut state = state_rc.borrow_mut();
|
|
|
|
if state.pending_promise_exceptions.is_empty() {
|
|
return Ok(());
|
|
}
|
|
|
|
let key = {
|
|
state
|
|
.pending_promise_exceptions
|
|
.keys()
|
|
.next()
|
|
.unwrap()
|
|
.clone()
|
|
};
|
|
let handle = state.pending_promise_exceptions.remove(&key).unwrap();
|
|
drop(state);
|
|
|
|
let scope = &mut self.handle_scope();
|
|
let exception = v8::Local::new(scope, handle);
|
|
exception_to_err_result(scope, exception, true)
|
|
}
|
|
|
|
// Send finished responses to JS
|
|
fn async_op_response(
|
|
&mut self,
|
|
async_responses: Vec<(PromiseId, OpResult)>,
|
|
) -> Result<(), AnyError> {
|
|
let state_rc = Self::state(self.v8_isolate());
|
|
|
|
let async_responses_size = async_responses.len();
|
|
if async_responses_size == 0 {
|
|
return Ok(());
|
|
}
|
|
|
|
let js_recv_cb_handle = state_rc.borrow().js_recv_cb.clone().unwrap();
|
|
|
|
let scope = &mut self.handle_scope();
|
|
|
|
// We return async responses to JS in unbounded batches (may change),
|
|
// each batch is a flat vector of tuples:
|
|
// `[promise_id1, op_result1, promise_id2, op_result2, ...]`
|
|
// promise_id is a simple integer, op_result is an ops::OpResult
|
|
// which contains a value OR an error, encoded as a tuple.
|
|
// This batch is received in JS via the special `arguments` variable
|
|
// and then each tuple is used to resolve or reject promises
|
|
let mut args: Vec<v8::Local<v8::Value>> =
|
|
Vec::with_capacity(2 * async_responses_size);
|
|
for overflown_response in async_responses {
|
|
let (promise_id, resp) = overflown_response;
|
|
args.push(v8::Integer::new(scope, promise_id as i32).into());
|
|
args.push(resp.to_v8(scope).unwrap());
|
|
}
|
|
|
|
let tc_scope = &mut v8::TryCatch::new(scope);
|
|
let js_recv_cb = js_recv_cb_handle.get(tc_scope);
|
|
let this = v8::undefined(tc_scope).into();
|
|
js_recv_cb.call(tc_scope, this, args.as_slice());
|
|
|
|
match tc_scope.exception() {
|
|
None => Ok(()),
|
|
Some(exception) => exception_to_err_result(tc_scope, exception, false),
|
|
}
|
|
}
|
|
|
|
fn drain_macrotasks(&mut self) -> Result<(), AnyError> {
|
|
let js_macrotask_cb_handle =
|
|
match &Self::state(self.v8_isolate()).borrow().js_macrotask_cb {
|
|
Some(handle) => handle.clone(),
|
|
None => return Ok(()),
|
|
};
|
|
|
|
let scope = &mut self.handle_scope();
|
|
let js_macrotask_cb = js_macrotask_cb_handle.get(scope);
|
|
|
|
// Repeatedly invoke macrotask callback until it returns true (done),
|
|
// such that ready microtasks would be automatically run before
|
|
// next macrotask is processed.
|
|
let tc_scope = &mut v8::TryCatch::new(scope);
|
|
let this = v8::undefined(tc_scope).into();
|
|
loop {
|
|
let is_done = js_macrotask_cb.call(tc_scope, this, &[]);
|
|
|
|
if let Some(exception) = tc_scope.exception() {
|
|
return exception_to_err_result(tc_scope, exception, false);
|
|
}
|
|
|
|
let is_done = is_done.unwrap();
|
|
if is_done.is_true() {
|
|
break;
|
|
}
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
pub mod tests {
|
|
use super::*;
|
|
use crate::error::custom_error;
|
|
use crate::modules::ModuleSourceFuture;
|
|
use crate::op_sync;
|
|
use crate::ZeroCopyBuf;
|
|
use futures::future::lazy;
|
|
use std::ops::FnOnce;
|
|
use std::rc::Rc;
|
|
use std::sync::atomic::{AtomicUsize, Ordering};
|
|
use std::sync::Arc;
|
|
|
|
pub fn run_in_task<F>(f: F)
|
|
where
|
|
F: FnOnce(&mut Context) + Send + 'static,
|
|
{
|
|
futures::executor::block_on(lazy(move |cx| f(cx)));
|
|
}
|
|
|
|
enum Mode {
|
|
Async,
|
|
AsyncZeroCopy(bool),
|
|
}
|
|
|
|
struct TestState {
|
|
mode: Mode,
|
|
dispatch_count: Arc<AtomicUsize>,
|
|
}
|
|
|
|
fn dispatch(rc_op_state: Rc<RefCell<OpState>>, payload: OpPayload) -> Op {
|
|
let rc_op_state2 = rc_op_state.clone();
|
|
let op_state_ = rc_op_state2.borrow();
|
|
let test_state = op_state_.borrow::<TestState>();
|
|
test_state.dispatch_count.fetch_add(1, Ordering::Relaxed);
|
|
let (control, buf): (u8, Option<ZeroCopyBuf>) =
|
|
payload.deserialize().unwrap();
|
|
match test_state.mode {
|
|
Mode::Async => {
|
|
assert_eq!(control, 42);
|
|
let resp = (0, serialize_op_result(Ok(43), rc_op_state));
|
|
Op::Async(Box::pin(futures::future::ready(resp)))
|
|
}
|
|
Mode::AsyncZeroCopy(has_buffer) => {
|
|
assert_eq!(buf.is_some(), has_buffer);
|
|
if let Some(buf) = buf {
|
|
assert_eq!(buf.len(), 1);
|
|
}
|
|
|
|
let resp = serialize_op_result(Ok(43), rc_op_state);
|
|
Op::Async(Box::pin(futures::future::ready((0, resp))))
|
|
}
|
|
}
|
|
}
|
|
|
|
fn setup(mode: Mode) -> (JsRuntime, Arc<AtomicUsize>) {
|
|
let dispatch_count = Arc::new(AtomicUsize::new(0));
|
|
let mut runtime = JsRuntime::new(Default::default());
|
|
let op_state = runtime.op_state();
|
|
op_state.borrow_mut().put(TestState {
|
|
mode,
|
|
dispatch_count: dispatch_count.clone(),
|
|
});
|
|
|
|
runtime.register_op("op_test", dispatch);
|
|
runtime.sync_ops_cache();
|
|
|
|
runtime
|
|
.execute(
|
|
"setup.js",
|
|
r#"
|
|
function assert(cond) {
|
|
if (!cond) {
|
|
throw Error("assert");
|
|
}
|
|
}
|
|
"#,
|
|
)
|
|
.unwrap();
|
|
assert_eq!(dispatch_count.load(Ordering::Relaxed), 0);
|
|
(runtime, dispatch_count)
|
|
}
|
|
|
|
#[test]
|
|
fn test_dispatch() {
|
|
let (mut runtime, dispatch_count) = setup(Mode::Async);
|
|
runtime
|
|
.execute(
|
|
"filename.js",
|
|
r#"
|
|
let control = 42;
|
|
Deno.core.opAsync("op_test", control);
|
|
async function main() {
|
|
Deno.core.opAsync("op_test", control);
|
|
}
|
|
main();
|
|
"#,
|
|
)
|
|
.unwrap();
|
|
assert_eq!(dispatch_count.load(Ordering::Relaxed), 2);
|
|
}
|
|
|
|
#[test]
|
|
fn test_dispatch_no_zero_copy_buf() {
|
|
let (mut runtime, dispatch_count) = setup(Mode::AsyncZeroCopy(false));
|
|
runtime
|
|
.execute(
|
|
"filename.js",
|
|
r#"
|
|
Deno.core.opAsync("op_test");
|
|
"#,
|
|
)
|
|
.unwrap();
|
|
assert_eq!(dispatch_count.load(Ordering::Relaxed), 1);
|
|
}
|
|
|
|
#[test]
|
|
fn test_dispatch_stack_zero_copy_bufs() {
|
|
let (mut runtime, dispatch_count) = setup(Mode::AsyncZeroCopy(true));
|
|
runtime
|
|
.execute(
|
|
"filename.js",
|
|
r#"
|
|
let zero_copy_a = new Uint8Array([0]);
|
|
Deno.core.opAsync("op_test", null, zero_copy_a);
|
|
"#,
|
|
)
|
|
.unwrap();
|
|
assert_eq!(dispatch_count.load(Ordering::Relaxed), 1);
|
|
}
|
|
|
|
#[test]
|
|
fn terminate_execution() {
|
|
let (mut isolate, _dispatch_count) = setup(Mode::Async);
|
|
// TODO(piscisaureus): in rusty_v8, the `thread_safe_handle()` method
|
|
// should not require a mutable reference to `struct rusty_v8::Isolate`.
|
|
let v8_isolate_handle = isolate.v8_isolate().thread_safe_handle();
|
|
|
|
let terminator_thread = std::thread::spawn(move || {
|
|
// allow deno to boot and run
|
|
std::thread::sleep(std::time::Duration::from_millis(100));
|
|
|
|
// terminate execution
|
|
let ok = v8_isolate_handle.terminate_execution();
|
|
assert!(ok);
|
|
});
|
|
|
|
// Rn an infinite loop, which should be terminated.
|
|
match isolate.execute("infinite_loop.js", "for(;;) {}") {
|
|
Ok(_) => panic!("execution should be terminated"),
|
|
Err(e) => {
|
|
assert_eq!(e.to_string(), "Uncaught Error: execution terminated")
|
|
}
|
|
};
|
|
|
|
// Cancel the execution-terminating exception in order to allow script
|
|
// execution again.
|
|
let ok = isolate.v8_isolate().cancel_terminate_execution();
|
|
assert!(ok);
|
|
|
|
// Verify that the isolate usable again.
|
|
isolate
|
|
.execute("simple.js", "1 + 1")
|
|
.expect("execution should be possible again");
|
|
|
|
terminator_thread.join().unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn dangling_shared_isolate() {
|
|
let v8_isolate_handle = {
|
|
// isolate is dropped at the end of this block
|
|
let (mut runtime, _dispatch_count) = setup(Mode::Async);
|
|
// TODO(piscisaureus): in rusty_v8, the `thread_safe_handle()` method
|
|
// should not require a mutable reference to `struct rusty_v8::Isolate`.
|
|
runtime.v8_isolate().thread_safe_handle()
|
|
};
|
|
|
|
// this should not SEGFAULT
|
|
v8_isolate_handle.terminate_execution();
|
|
}
|
|
|
|
#[test]
|
|
fn test_pre_dispatch() {
|
|
run_in_task(|mut cx| {
|
|
let (mut runtime, _dispatch_count) = setup(Mode::Async);
|
|
runtime
|
|
.execute(
|
|
"bad_op_id.js",
|
|
r#"
|
|
let thrown;
|
|
try {
|
|
Deno.core.opSync(100);
|
|
} catch (e) {
|
|
thrown = e;
|
|
}
|
|
assert(String(thrown) === "TypeError: Unknown op id: 100");
|
|
"#,
|
|
)
|
|
.unwrap();
|
|
if let Poll::Ready(Err(_)) = runtime.poll_event_loop(&mut cx) {
|
|
unreachable!();
|
|
}
|
|
});
|
|
}
|
|
|
|
#[test]
|
|
fn syntax_error() {
|
|
let mut runtime = JsRuntime::new(Default::default());
|
|
let src = "hocuspocus(";
|
|
let r = runtime.execute("i.js", src);
|
|
let e = r.unwrap_err();
|
|
let js_error = e.downcast::<JsError>().unwrap();
|
|
assert_eq!(js_error.end_column, Some(11));
|
|
}
|
|
|
|
#[test]
|
|
fn test_encode_decode() {
|
|
run_in_task(|mut cx| {
|
|
let (mut runtime, _dispatch_count) = setup(Mode::Async);
|
|
runtime
|
|
.execute(
|
|
"encode_decode_test.js",
|
|
include_str!("encode_decode_test.js"),
|
|
)
|
|
.unwrap();
|
|
if let Poll::Ready(Err(_)) = runtime.poll_event_loop(&mut cx) {
|
|
unreachable!();
|
|
}
|
|
});
|
|
}
|
|
|
|
#[test]
|
|
fn test_serialize_deserialize() {
|
|
run_in_task(|mut cx| {
|
|
let (mut runtime, _dispatch_count) = setup(Mode::Async);
|
|
runtime
|
|
.execute(
|
|
"serialize_deserialize_test.js",
|
|
include_str!("serialize_deserialize_test.js"),
|
|
)
|
|
.unwrap();
|
|
if let Poll::Ready(Err(_)) = runtime.poll_event_loop(&mut cx) {
|
|
unreachable!();
|
|
}
|
|
});
|
|
}
|
|
|
|
#[test]
|
|
fn test_error_builder() {
|
|
fn op_err(
|
|
_: &mut OpState,
|
|
_: (),
|
|
_: Option<ZeroCopyBuf>,
|
|
) -> Result<(), AnyError> {
|
|
Err(custom_error("DOMExceptionOperationError", "abc"))
|
|
}
|
|
|
|
pub fn get_error_class_name(_: &AnyError) -> &'static str {
|
|
"DOMExceptionOperationError"
|
|
}
|
|
|
|
run_in_task(|mut cx| {
|
|
let mut runtime = JsRuntime::new(RuntimeOptions {
|
|
get_error_class_fn: Some(&get_error_class_name),
|
|
..Default::default()
|
|
});
|
|
runtime.register_op("op_err", op_sync(op_err));
|
|
runtime.sync_ops_cache();
|
|
runtime
|
|
.execute(
|
|
"error_builder_test.js",
|
|
include_str!("error_builder_test.js"),
|
|
)
|
|
.unwrap();
|
|
if let Poll::Ready(Err(_)) = runtime.poll_event_loop(&mut cx) {
|
|
unreachable!();
|
|
}
|
|
});
|
|
}
|
|
|
|
#[test]
|
|
fn will_snapshot() {
|
|
let snapshot = {
|
|
let mut runtime = JsRuntime::new(RuntimeOptions {
|
|
will_snapshot: true,
|
|
..Default::default()
|
|
});
|
|
runtime.execute("a.js", "a = 1 + 2").unwrap();
|
|
runtime.snapshot()
|
|
};
|
|
|
|
let snapshot = Snapshot::JustCreated(snapshot);
|
|
let mut runtime2 = JsRuntime::new(RuntimeOptions {
|
|
startup_snapshot: Some(snapshot),
|
|
..Default::default()
|
|
});
|
|
runtime2
|
|
.execute("check.js", "if (a != 3) throw Error('x')")
|
|
.unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn test_from_boxed_snapshot() {
|
|
let snapshot = {
|
|
let mut runtime = JsRuntime::new(RuntimeOptions {
|
|
will_snapshot: true,
|
|
..Default::default()
|
|
});
|
|
runtime.execute("a.js", "a = 1 + 2").unwrap();
|
|
let snap: &[u8] = &*runtime.snapshot();
|
|
Vec::from(snap).into_boxed_slice()
|
|
};
|
|
|
|
let snapshot = Snapshot::Boxed(snapshot);
|
|
let mut runtime2 = JsRuntime::new(RuntimeOptions {
|
|
startup_snapshot: Some(snapshot),
|
|
..Default::default()
|
|
});
|
|
runtime2
|
|
.execute("check.js", "if (a != 3) throw Error('x')")
|
|
.unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn test_heap_limits() {
|
|
let create_params = v8::Isolate::create_params().heap_limits(0, 20 * 1024);
|
|
let mut runtime = JsRuntime::new(RuntimeOptions {
|
|
create_params: Some(create_params),
|
|
..Default::default()
|
|
});
|
|
let cb_handle = runtime.v8_isolate().thread_safe_handle();
|
|
|
|
let callback_invoke_count = Rc::new(AtomicUsize::default());
|
|
let inner_invoke_count = Rc::clone(&callback_invoke_count);
|
|
|
|
runtime.add_near_heap_limit_callback(
|
|
move |current_limit, _initial_limit| {
|
|
inner_invoke_count.fetch_add(1, Ordering::SeqCst);
|
|
cb_handle.terminate_execution();
|
|
current_limit * 2
|
|
},
|
|
);
|
|
let err = runtime
|
|
.execute(
|
|
"script name",
|
|
r#"let s = ""; while(true) { s += "Hello"; }"#,
|
|
)
|
|
.expect_err("script should fail");
|
|
assert_eq!(
|
|
"Uncaught Error: execution terminated",
|
|
err.downcast::<JsError>().unwrap().message
|
|
);
|
|
assert!(callback_invoke_count.load(Ordering::SeqCst) > 0)
|
|
}
|
|
|
|
#[test]
|
|
fn test_heap_limit_cb_remove() {
|
|
let mut runtime = JsRuntime::new(Default::default());
|
|
|
|
runtime.add_near_heap_limit_callback(|current_limit, _initial_limit| {
|
|
current_limit * 2
|
|
});
|
|
runtime.remove_near_heap_limit_callback(20 * 1024);
|
|
assert!(runtime.allocations.near_heap_limit_callback_data.is_none());
|
|
}
|
|
|
|
#[test]
|
|
fn test_heap_limit_cb_multiple() {
|
|
let create_params = v8::Isolate::create_params().heap_limits(0, 20 * 1024);
|
|
let mut runtime = JsRuntime::new(RuntimeOptions {
|
|
create_params: Some(create_params),
|
|
..Default::default()
|
|
});
|
|
let cb_handle = runtime.v8_isolate().thread_safe_handle();
|
|
|
|
let callback_invoke_count_first = Rc::new(AtomicUsize::default());
|
|
let inner_invoke_count_first = Rc::clone(&callback_invoke_count_first);
|
|
runtime.add_near_heap_limit_callback(
|
|
move |current_limit, _initial_limit| {
|
|
inner_invoke_count_first.fetch_add(1, Ordering::SeqCst);
|
|
current_limit * 2
|
|
},
|
|
);
|
|
|
|
let callback_invoke_count_second = Rc::new(AtomicUsize::default());
|
|
let inner_invoke_count_second = Rc::clone(&callback_invoke_count_second);
|
|
runtime.add_near_heap_limit_callback(
|
|
move |current_limit, _initial_limit| {
|
|
inner_invoke_count_second.fetch_add(1, Ordering::SeqCst);
|
|
cb_handle.terminate_execution();
|
|
current_limit * 2
|
|
},
|
|
);
|
|
|
|
let err = runtime
|
|
.execute(
|
|
"script name",
|
|
r#"let s = ""; while(true) { s += "Hello"; }"#,
|
|
)
|
|
.expect_err("script should fail");
|
|
assert_eq!(
|
|
"Uncaught Error: execution terminated",
|
|
err.downcast::<JsError>().unwrap().message
|
|
);
|
|
assert_eq!(0, callback_invoke_count_first.load(Ordering::SeqCst));
|
|
assert!(callback_invoke_count_second.load(Ordering::SeqCst) > 0);
|
|
}
|
|
|
|
#[test]
|
|
fn es_snapshot() {
|
|
#[derive(Default)]
|
|
struct ModsLoader;
|
|
|
|
impl ModuleLoader for ModsLoader {
|
|
fn resolve(
|
|
&self,
|
|
_op_state: Rc<RefCell<OpState>>,
|
|
specifier: &str,
|
|
referrer: &str,
|
|
_is_main: bool,
|
|
) -> Result<ModuleSpecifier, AnyError> {
|
|
assert_eq!(specifier, "file:///main.js");
|
|
assert_eq!(referrer, ".");
|
|
let s = crate::resolve_import(specifier, referrer).unwrap();
|
|
Ok(s)
|
|
}
|
|
|
|
fn load(
|
|
&self,
|
|
_op_state: Rc<RefCell<OpState>>,
|
|
_module_specifier: &ModuleSpecifier,
|
|
_maybe_referrer: Option<ModuleSpecifier>,
|
|
_is_dyn_import: bool,
|
|
) -> Pin<Box<ModuleSourceFuture>> {
|
|
unreachable!()
|
|
}
|
|
}
|
|
|
|
let loader = std::rc::Rc::new(ModsLoader::default());
|
|
let mut runtime = JsRuntime::new(RuntimeOptions {
|
|
module_loader: Some(loader),
|
|
will_snapshot: true,
|
|
..Default::default()
|
|
});
|
|
|
|
let specifier = crate::resolve_url("file:///main.js").unwrap();
|
|
let source_code = "Deno.core.print('hello\\n')".to_string();
|
|
|
|
let module_id = futures::executor::block_on(
|
|
runtime.load_module(&specifier, Some(source_code)),
|
|
)
|
|
.unwrap();
|
|
|
|
runtime.mod_evaluate(module_id);
|
|
futures::executor::block_on(runtime.run_event_loop()).unwrap();
|
|
|
|
let _snapshot = runtime.snapshot();
|
|
}
|
|
|
|
#[test]
|
|
fn test_error_without_stack() {
|
|
let mut runtime = JsRuntime::new(RuntimeOptions::default());
|
|
// SyntaxError
|
|
let result = runtime.execute(
|
|
"error_without_stack.js",
|
|
r#"
|
|
function main() {
|
|
console.log("asdf);
|
|
}
|
|
|
|
main();
|
|
"#,
|
|
);
|
|
let expected_error = r#"Uncaught SyntaxError: Invalid or unexpected token
|
|
at error_without_stack.js:3:14"#;
|
|
assert_eq!(result.unwrap_err().to_string(), expected_error);
|
|
}
|
|
|
|
#[test]
|
|
fn test_error_stack() {
|
|
let mut runtime = JsRuntime::new(RuntimeOptions::default());
|
|
let result = runtime.execute(
|
|
"error_stack.js",
|
|
r#"
|
|
function assert(cond) {
|
|
if (!cond) {
|
|
throw Error("assert");
|
|
}
|
|
}
|
|
|
|
function main() {
|
|
assert(false);
|
|
}
|
|
|
|
main();
|
|
"#,
|
|
);
|
|
let expected_error = r#"Error: assert
|
|
at assert (error_stack.js:4:11)
|
|
at main (error_stack.js:9:3)
|
|
at error_stack.js:12:1"#;
|
|
assert_eq!(result.unwrap_err().to_string(), expected_error);
|
|
}
|
|
|
|
#[test]
|
|
fn test_error_async_stack() {
|
|
run_in_task(|cx| {
|
|
let mut runtime = JsRuntime::new(RuntimeOptions::default());
|
|
runtime
|
|
.execute(
|
|
"error_async_stack.js",
|
|
r#"
|
|
(async () => {
|
|
const p = (async () => {
|
|
await Promise.resolve().then(() => {
|
|
throw new Error("async");
|
|
});
|
|
})();
|
|
|
|
try {
|
|
await p;
|
|
} catch (error) {
|
|
console.log(error.stack);
|
|
throw error;
|
|
}
|
|
})();"#,
|
|
)
|
|
.unwrap();
|
|
let expected_error = r#"Error: async
|
|
at error_async_stack.js:5:13
|
|
at async error_async_stack.js:4:5
|
|
at async error_async_stack.js:10:5"#;
|
|
|
|
match runtime.poll_event_loop(cx) {
|
|
Poll::Ready(Err(e)) => {
|
|
assert_eq!(e.to_string(), expected_error);
|
|
}
|
|
_ => panic!(),
|
|
};
|
|
})
|
|
}
|
|
|
|
#[test]
|
|
fn test_core_js_stack_frame() {
|
|
let mut runtime = JsRuntime::new(RuntimeOptions::default());
|
|
// Call non-existent op so we get error from `core.js`
|
|
let error = runtime
|
|
.execute(
|
|
"core_js_stack_frame.js",
|
|
"Deno.core.opSync('non_existent');",
|
|
)
|
|
.unwrap_err();
|
|
let error_string = error.to_string();
|
|
// Test that the script specifier is a URL: `deno:<repo-relative path>`.
|
|
assert!(error_string.contains("deno:core/core.js"));
|
|
}
|
|
|
|
#[test]
|
|
fn test_v8_platform() {
|
|
let options = RuntimeOptions {
|
|
v8_platform: Some(v8::new_default_platform()),
|
|
..Default::default()
|
|
};
|
|
let mut runtime = JsRuntime::new(options);
|
|
runtime.execute("<none>", "").unwrap();
|
|
}
|
|
}
|