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map.rs
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2642 lines (2385 loc) · 83.1 KB
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// Copyright 2018-2026 the Deno authors. MIT license.
use std::borrow::Cow;
use std::cell::Cell;
use std::cell::RefCell;
use std::collections::HashMap;
use std::future::Future;
use std::ops::DerefMut;
use std::pin::Pin;
use std::rc::Rc;
use std::task::Context;
use std::task::Poll;
use capacity_builder::StringBuilder;
use deno_core::error::CoreError;
use deno_error::JsErrorBox;
use futures::StreamExt;
use futures::future::Either;
use futures::future::FutureExt;
use futures::stream::FuturesUnordered;
use futures::stream::StreamFuture;
use futures::task::AtomicWaker;
use indexmap::IndexMap;
use sourcemap::DecodedMap;
use tokio::sync::oneshot;
use v8::Function;
use v8::PromiseState;
use wasm_dep_analyzer::WasmDeps;
use super::CustomModuleEvaluationKind;
use super::IntoModuleCodeString;
use super::IntoModuleName;
use super::LazyEsmModuleLoader;
use super::ModuleConcreteError;
use super::RequestedModuleType;
use super::loaders::ModuleLoadOptions;
use super::module_map_data::ModuleMapData;
use super::module_map_data::ModuleMapSnapshotData;
use super::recursive_load::SideModuleKind;
use crate::FastStaticString;
use crate::JsRuntime;
use crate::ModuleCodeBytes;
use crate::ModuleLoadResponse;
use crate::ModuleSource;
use crate::ModuleSourceCode;
use crate::ModuleSpecifier;
use crate::ascii_str;
use crate::error::CoreErrorKind;
use crate::error::JsError;
use crate::error::exception_to_err;
use crate::error::exception_to_err_result;
use crate::modules::ImportAttributesKind;
use crate::modules::ModuleCodeString;
use crate::modules::ModuleError;
use crate::modules::ModuleId;
use crate::modules::ModuleImportPhase;
use crate::modules::ModuleLoadId;
use crate::modules::ModuleLoader;
use crate::modules::ModuleName;
use crate::modules::ModuleReference;
use crate::modules::ModuleRequest;
use crate::modules::ModuleType;
use crate::modules::ResolutionKind;
use crate::modules::get_requested_module_type_from_attributes;
use crate::modules::module_map_data::ModuleSourceKey;
use crate::modules::parse_import_attributes;
use crate::modules::recursive_load::RecursiveModuleLoad;
use crate::runtime::JsRealm;
use crate::runtime::SnapshotLoadDataStore;
use crate::runtime::SnapshotStoreDataStore;
use crate::runtime::exception_state::ExceptionState;
use crate::source_map::SourceMapper;
const DATA_PREFIX: &str = "data:";
type PrepareLoadFuture =
dyn Future<Output = (ModuleLoadId, Result<RecursiveModuleLoad, CoreError>)>;
type CodeCacheReadyFuture = dyn Future<Output = ()>;
struct ModEvaluate {
module_map: Rc<ModuleMap>,
sender: Option<oneshot::Sender<Result<(), Box<JsError>>>>,
module: Option<v8::Global<v8::Module>>,
notify: Vec<v8::Global<v8::Function>>,
}
impl ModEvaluate {
fn notify(&mut self, scope: &mut v8::PinScope) {
if !self.notify.is_empty() {
let module = v8::Local::new(scope, self.module.take().unwrap());
let ns = module.get_module_namespace();
let recv = v8::undefined(scope).into();
let args = &[ns];
for notify in std::mem::take(&mut self.notify).into_iter() {
let notify = v8::Local::new(scope, notify);
notify.call(scope, recv, args);
}
}
_ = self.sender.take().unwrap().send(Ok(()));
}
}
type CodeCacheReadyCallback =
Box<dyn FnOnce(&[u8]) -> Pin<Box<dyn Future<Output = ()>>>>;
pub(crate) struct CodeCacheInfo {
data: Option<Cow<'static, [u8]>>,
ready_callback: CodeCacheReadyCallback,
}
pub const BOM_CHAR: &[u8] = &[0xef, 0xbb, 0xbf];
/// Strips the byte order mark from the provided text if it exists.
fn strip_bom(source_code: &[u8]) -> &[u8] {
if source_code.starts_with(BOM_CHAR) {
&source_code[BOM_CHAR.len()..]
} else {
source_code
}
}
struct DynImportModEvaluate {
load_id: ModuleLoadId,
module_id: ModuleId,
promise: v8::Global<v8::Promise>,
module: v8::Global<v8::Module>,
}
#[derive(Debug, Clone)]
struct DynImportState {
resolver: v8::Global<v8::PromiseResolver>,
cped: v8::Global<v8::Value>,
phase: ModuleImportPhase,
}
/// A collection of JS modules.
pub(crate) struct ModuleMap {
// Handling of futures for loading module sources
// TODO(mmastrac): we should not be swapping this loader out
pub(crate) loader: RefCell<Rc<dyn ModuleLoader>>,
pub(crate) source_mapper: Rc<RefCell<SourceMapper>>,
exception_state: Rc<ExceptionState>,
dynamic_import_map: RefCell<HashMap<ModuleLoadId, DynImportState>>,
preparing_dynamic_imports:
RefCell<FuturesUnordered<Pin<Box<PrepareLoadFuture>>>>,
preparing_dynamic_imports_pending: Cell<bool>,
pending_dynamic_imports:
RefCell<FuturesUnordered<StreamFuture<RecursiveModuleLoad>>>,
pending_dynamic_imports_pending: Cell<bool>,
pending_dyn_mod_evaluations: RefCell<Vec<DynImportModEvaluate>>,
pending_dyn_mod_evaluations_pending: Cell<bool>,
pending_tla_waiters:
RefCell<HashMap<ModuleId, Vec<v8::Global<v8::PromiseResolver>>>>,
pending_mod_evaluation: Cell<bool>,
code_cache_ready_futs:
RefCell<FuturesUnordered<Pin<Box<CodeCacheReadyFuture>>>>,
pending_code_cache_ready: Cell<bool>,
module_waker: AtomicWaker,
data: RefCell<ModuleMapData>,
will_snapshot: bool,
/// A counter used to delay our dynamic import deadlock detection by one spin
/// of the event loop.
pub(crate) dyn_module_evaluate_idle_counter: Cell<u32>,
}
impl ModuleMap {
/// There is a circular Rc reference between the module map and the futures,
/// so when destroying the module map we need to clear the pending futures.
pub(crate) fn destroy(&self) {
self.dynamic_import_map.borrow_mut().clear();
self.preparing_dynamic_imports.borrow_mut().clear();
self.pending_dynamic_imports.borrow_mut().clear();
self.pending_tla_waiters.borrow_mut().clear();
self.code_cache_ready_futs.borrow_mut().clear();
std::mem::take(&mut *self.data.borrow_mut());
}
pub(crate) fn next_load_id(&self) -> i32 {
// TODO(mmastrac): move recursive module loading into here so we can avoid making this pub
let mut data = self.data.borrow_mut();
let id = data.next_load_id;
data.next_load_id += 1;
id + 1
}
#[cfg(debug_assertions)]
pub(crate) fn check_all_modules_evaluated(
&self,
scope: &mut v8::PinScope,
) -> Result<(), CoreError> {
let mut not_evaluated = vec![];
let data = self.data.borrow();
for (handle, i) in data.handles_inverted.iter() {
let module = v8::Local::new(scope, handle);
match module.get_status() {
v8::ModuleStatus::Errored => {
return Err(
CoreErrorKind::Js(JsError::from_v8_exception(
scope,
module.get_exception(),
))
.into_box(),
);
}
v8::ModuleStatus::Evaluated => {}
_ => {
not_evaluated.push(data.info[*i].name.as_str().to_string());
}
}
}
if !not_evaluated.is_empty() {
return Err(CoreErrorKind::NonEvaluatedModules(not_evaluated).into_box());
}
Ok(())
}
pub(crate) fn new(
loader: Rc<dyn ModuleLoader>,
source_mapper: Rc<RefCell<SourceMapper>>,
exception_state: Rc<ExceptionState>,
will_snapshot: bool,
) -> Self {
Self {
will_snapshot,
loader: loader.into(),
source_mapper,
exception_state,
dyn_module_evaluate_idle_counter: Default::default(),
dynamic_import_map: Default::default(),
preparing_dynamic_imports: Default::default(),
preparing_dynamic_imports_pending: Default::default(),
pending_dynamic_imports: Default::default(),
pending_dynamic_imports_pending: Default::default(),
pending_dyn_mod_evaluations: Default::default(),
pending_dyn_mod_evaluations_pending: Default::default(),
pending_tla_waiters: Default::default(),
pending_mod_evaluation: Default::default(),
code_cache_ready_futs: Default::default(),
pending_code_cache_ready: Default::default(),
module_waker: Default::default(),
data: Default::default(),
}
}
pub(crate) fn update_with_snapshotted_data(
&self,
scope: &mut v8::PinScope,
data_store: &mut SnapshotLoadDataStore,
data: ModuleMapSnapshotData,
) {
self
.data
.borrow_mut()
.update_with_snapshotted_data(scope, data_store, data);
}
/// Get module id, following all aliases in case of module specifier
/// that had been redirected.
pub(crate) fn get_id(
&self,
name: &str,
requested_module_type: impl AsRef<RequestedModuleType>,
) -> Option<ModuleId> {
self.data.borrow().get_id(name, requested_module_type)
}
pub(crate) fn is_main_module(&self, global: &v8::Global<v8::Module>) -> bool {
self.data.borrow().is_main_module(global)
}
pub(crate) fn is_main_module_id(&self, id: ModuleId) -> bool {
self.data.borrow().main_module_id == Some(id)
}
pub(crate) fn get_name_by_module(
&self,
global: &v8::Global<v8::Module>,
) -> Option<String> {
self.data.borrow().get_name_by_module(global)
}
pub(crate) fn get_name_by_id(&self, id: ModuleId) -> Option<String> {
self.data.borrow().get_name_by_id(id)
}
pub(crate) fn get_type_by_module(
&self,
global: &v8::Global<v8::Module>,
) -> Option<ModuleType> {
self.data.borrow().get_type_by_module(global)
}
pub(crate) fn get_handle(
&self,
id: ModuleId,
) -> Option<v8::Global<v8::Module>> {
self.data.borrow().get_handle(id)
}
pub(crate) fn serialize_for_snapshotting(
&self,
data_store: &mut SnapshotStoreDataStore,
) -> ModuleMapSnapshotData {
let data = std::mem::take(&mut *self.data.borrow_mut());
data.serialize_for_snapshotting(data_store)
}
#[cfg(test)]
pub fn is_alias(
&self,
name: &str,
requested_module_type: impl AsRef<RequestedModuleType>,
) -> bool {
self.data.borrow().is_alias(name, requested_module_type)
}
pub(crate) fn get_data(&self) -> &RefCell<ModuleMapData> {
&self.data
}
#[cfg(test)]
pub fn assert_module_map(&self, modules: &Vec<super::ModuleInfo>) {
self.data.borrow().assert_module_map(modules);
}
pub(crate) fn new_module(
&self,
scope: &mut v8::PinScope,
main: bool,
dynamic: bool,
module_source: ModuleSource,
) -> Result<ModuleId, ModuleError> {
let ModuleSource {
code,
module_type,
module_url_found,
module_url_specified,
code_cache,
} = module_source;
// Register the module in the module map unless it's already there. If the
// specified URL and the "true" URL are different, register the alias.
let module_url_found = if let Some(module_url_found) = module_url_found {
let (module_url_found1, module_url_found2) =
module_url_found.into_cheap_copy();
self.data.borrow_mut().alias(
module_url_specified,
&module_type.clone().into(),
module_url_found1,
);
module_url_found2
} else {
module_url_specified
};
// TODO(bartlomieju): I have a hunch that this is wrong - write a test
// that tries to "confuse" the type system, by first requesting a module
// with type `RequestedModuleType::Other("foo".into)``, and then the loader
// actually returns `ModuleType::Other("bar".into())`. See if it leads to
// unexpected result in how `ModuleMap` is structured and verify how
// querying the module map works (`ModuleMap::get_by_id`, `ModuleMap::get_by_name`).
let requested_module_type = RequestedModuleType::from(module_type.clone());
let maybe_module_id = self.get_id(&module_url_found, requested_module_type);
if let Some(module_id) = maybe_module_id {
return Ok(module_id);
}
let module_id = match module_type {
ModuleType::JavaScript => {
let code = ModuleSource::get_string_source(code);
let (code_cache_info, module_url_found) =
if let Some(code_cache) = code_cache {
let (module_url_found1, module_url_found2) =
module_url_found.into_cheap_copy();
let loader = self.loader.borrow().clone();
(
Some(CodeCacheInfo {
data: code_cache.data,
ready_callback: Box::new(move |cache| {
let specifier =
ModuleSpecifier::parse(module_url_found1.as_str()).unwrap();
loader.code_cache_ready(specifier, code_cache.hash, cache)
}),
}),
module_url_found2,
)
} else {
(None, module_url_found)
};
self.new_module_from_js_source(
scope,
main,
ModuleType::JavaScript,
module_url_found,
code,
dynamic,
code_cache_info,
)?
}
ModuleType::Wasm => {
self.new_wasm_module(scope, module_url_found, code, dynamic)?
}
ModuleType::Json => self.new_json_module(
scope,
module_url_found,
ModuleSource::get_string_source(code),
)?,
ModuleType::Text => self.new_text_module(
scope,
module_url_found,
ModuleSource::get_string_source(code),
)?,
ModuleType::Bytes => {
let ModuleSourceCode::Bytes(code) = code else {
return Err(ModuleError::Concrete(
ModuleConcreteError::BytesNotBytes,
));
};
self.new_bytes_module(scope, module_url_found, code)?
}
ModuleType::Other(module_type) => {
let state = JsRuntime::state_from(scope);
let custom_module_evaluation_cb =
state.custom_module_evaluation_cb.as_ref();
let Some(custom_evaluation_cb) = custom_module_evaluation_cb else {
return Err(ModuleError::Concrete(
ModuleConcreteError::UnsupportedKind(module_type.to_string()),
));
};
// TODO(bartlomieju): creating a global just to create a local from it
// seems superfluous. However, changing `CustomModuleEvaluationCb` to have
// a lifetime will have a viral effect and required `JsRuntimeOptions`
// to have a callback as well as `JsRuntime`.
let module_evaluation_kind = custom_evaluation_cb(
scope,
module_type.clone(),
&module_url_found,
code,
)
.map_err(|e| ModuleError::Core(e.into()))?;
match module_evaluation_kind {
// Simple case, we just got a single value so we create a regular
// synthetic module.
CustomModuleEvaluationKind::Synthetic(value_global) => {
let value = v8::Local::new(scope, value_global);
let exports = vec![(ascii_str!("default"), value)];
self.new_synthetic_module(
scope,
module_url_found,
ModuleType::Other(module_type.clone()),
exports,
)
}
// Complex case - besides a synthetic module, we will create a new
// module from JS code.
CustomModuleEvaluationKind::ComputedAndSynthetic(
computed_src,
synthetic_value,
synthetic_module_type,
) => {
let (url1, url2) = module_url_found.into_cheap_copy();
let value = v8::Local::new(scope, synthetic_value);
let exports = vec![(ascii_str!("default"), value)];
let _synthetic_mod_id = self.new_synthetic_module(
scope,
url1,
synthetic_module_type,
exports,
);
let (code_cache_info, url2) = if let Some(code_cache) = code_cache {
let (url1, url2) = url2.into_cheap_copy();
let loader = self.loader.borrow().clone();
(
Some(CodeCacheInfo {
data: code_cache.data,
ready_callback: Box::new(move |cache| {
let specifier =
ModuleSpecifier::parse(url1.as_str()).unwrap();
loader.code_cache_ready(specifier, code_cache.hash, cache)
}),
}),
url2,
)
} else {
(None, url2)
};
self.new_module_from_js_source(
scope,
main,
ModuleType::Other(module_type.clone()),
url2,
computed_src,
dynamic,
code_cache_info,
)?
}
}
}
};
Ok(module_id)
}
/// Creates a "synthetic module", that contains only a single, "default" export.
///
/// The module gets instantiated and its ID is returned.
pub fn new_synthetic_module<'s, 'i>(
&self,
scope: &mut v8::PinScope<'s, 'i>,
name: impl IntoModuleName,
module_type: ModuleType,
exports: Vec<(FastStaticString, v8::Local<'s, v8::Value>)>,
) -> ModuleId {
let name = name.into_module_name();
let name_str = name.v8_string(scope).unwrap();
let export_names = exports
.iter()
.map(|(name, _)| name.v8_string(scope).unwrap())
.collect::<Vec<_>>();
let module = v8::Module::create_synthetic_module(
scope,
name_str,
&export_names,
synthetic_module_evaluation_steps,
);
let handle = v8::Global::<v8::Module>::new(scope, module);
let mut exports_global = Vec::with_capacity(exports.len());
for i in 0..exports.len() {
let export_name = export_names[i];
let (_, export_value) = exports[i];
exports_global.push((
v8::Global::new(scope, export_name),
v8::Global::new(scope, export_value),
));
}
self
.data
.borrow_mut()
.synthetic_module_exports_store
.insert(handle.clone(), exports_global);
let id = self.data.borrow_mut().create_module_info(
name,
module_type,
handle,
false,
vec![],
);
// Synthetic modules have no imports so their instantation must never fail.
self.instantiate_module(scope, id).unwrap();
id
}
// TODO(bartlomieju): remove this method or rename it to `new_js_module`.
/// Create and compile an ES module.
pub(crate) fn new_es_module(
&self,
scope: &mut v8::PinScope,
main: bool,
name: ModuleName,
source: ModuleCodeString,
is_dynamic_import: bool,
code_cache_info: Option<CodeCacheInfo>,
) -> Result<ModuleId, ModuleError> {
self.new_module_from_js_source(
scope,
main,
ModuleType::JavaScript,
name,
source,
is_dynamic_import,
code_cache_info,
)
}
/// Provided given JavaScript source code, compile and create a module of given
/// type.
///
/// Passed type doesn't have to be [`ModuleType::JavaScript`]! This method
/// can be used to create "shim" modules, that execute some JS and act as a
/// proxy to the actual underlying module (eg. you might create a "shim" for
/// Wasm module).
///
/// Imports in the executed code are parsed (along their import attributes)
/// and attached to associated [`ModuleInfo`].
///
/// Returns an ID of newly created module.
#[allow(clippy::too_many_arguments)]
pub(crate) fn new_module_from_js_source(
&self,
scope: &mut v8::PinScope,
main: bool,
module_type: ModuleType,
name: ModuleName,
source: ModuleCodeString,
is_dynamic_import: bool,
mut code_cache_info: Option<CodeCacheInfo>,
) -> Result<ModuleId, ModuleError> {
if main {
let data = self.data.borrow();
if let Some(main_module) = data.main_module_id {
let main_name = self.data.borrow().get_name_by_id(main_module).unwrap();
return Err(ModuleError::Concrete(
ModuleConcreteError::MainModuleAlreadyExists {
main_module: main_name.to_string(),
new_module: name.to_string(),
},
));
}
}
let name_str = name.v8_string(scope).unwrap();
let source_str = source.v8_string(scope).unwrap();
let host_defined_options = self
.loader
.borrow()
.get_host_defined_options(scope, name.as_str());
let origin = script_origin(scope, name_str, true, host_defined_options);
v8::tc_scope!(let tc_scope, scope);
let (maybe_module, try_store_code_cache) = code_cache_info
.as_ref()
.and_then(|code_cache_info| {
code_cache_info.data.as_ref().map(|cache| {
let mut source = v8::script_compiler::Source::new_with_cached_data(
source_str,
Some(&origin),
v8::CachedData::new(cache),
);
let maybe_module = v8::script_compiler::compile_module2(
tc_scope,
&mut source,
v8::script_compiler::CompileOptions::ConsumeCodeCache,
v8::script_compiler::NoCacheReason::NoReason,
);
// Check if the provided code cache is rejected by V8.
let rejected = match source.get_cached_data() {
Some(cached_data) => cached_data.rejected(),
_ => true,
};
(maybe_module, rejected)
})
})
.unwrap_or_else(|| {
let mut source =
v8::script_compiler::Source::new(source_str, Some(&origin));
(
v8::script_compiler::compile_module(tc_scope, &mut source),
true,
)
});
if tc_scope.has_caught() {
assert!(maybe_module.is_none());
let exception = tc_scope.exception().unwrap();
let exception = v8::Global::new(tc_scope, exception);
// TODO(bartlomieju): add a more concrete variant - like `ModuleError::CompileError`?
return Err(ModuleError::Exception(exception));
}
let module = maybe_module.unwrap();
// V8 does not support creating code caches while also snapshotting,
// and it's not needed anyway, as the snapshot already contains it.
if try_store_code_cache
&& !self.will_snapshot
&& let Some(code_cache_info) = code_cache_info.take()
{
let unbound_module_script = module.get_unbound_module_script(tc_scope);
let code_cache =
unbound_module_script.create_code_cache().ok_or_else(|| {
ModuleError::Concrete(
ModuleConcreteError::UnboundModuleScriptCodeCache,
)
})?;
let fut =
async move { (code_cache_info.ready_callback)(&code_cache).await }
.boxed_local();
self.code_cache_ready_futs.borrow_mut().push(fut);
self.pending_code_cache_ready.set(true);
}
// Extract native source map URL from V8
let unbound_module_script = module.get_unbound_module_script(tc_scope);
let source_mapping_url_value =
unbound_module_script.get_source_mapping_url(tc_scope);
if !source_mapping_url_value.is_undefined()
&& !source_mapping_url_value.is_null()
{
let source_mapping_url =
source_mapping_url_value.to_rust_string_lossy(tc_scope);
let module_name = name
.try_clone()
.unwrap_or_else(|| ModuleName::from(name.as_str().to_string()));
if source_mapping_url.starts_with(DATA_PREFIX) {
if let Ok(DecodedMap::Regular(sm)) =
sourcemap::decode_data_url(&source_mapping_url)
{
self
.source_mapper
.borrow_mut()
.add_source_map(module_name, sm);
}
} else {
// Resolve external source map URL relative to the module URL
let resolved_url =
if let Ok(module_url) = ModuleSpecifier::parse(name.as_str()) {
module_url
.join(&source_mapping_url)
.unwrap_or(module_url)
.to_string()
} else {
source_mapping_url
};
self
.source_mapper
.borrow_mut()
.add_source_map_url(module_name, resolved_url);
}
}
// TODO(bartlomieju): maybe move to a helper function?
let module_requests = module.get_module_requests();
let requests_len = module_requests.length();
let mut requests = Vec::with_capacity(requests_len);
for i in 0..module_requests.length() {
let module_request = v8::Local::<v8::ModuleRequest>::try_from(
module_requests.get(tc_scope, i).unwrap(),
)
.unwrap();
let import_specifier = module_request
.get_specifier()
.to_rust_string_lossy(tc_scope);
let import_attributes = module_request.get_import_attributes();
let attributes = parse_import_attributes(
tc_scope,
import_attributes,
ImportAttributesKind::StaticImport,
);
// FIXME(bartomieju): there are no stack frames if exception
// is thrown here
{
let state = JsRuntime::state_from(tc_scope);
if let Some(validate_import_attributes_cb) =
&state.validate_import_attributes_cb
{
(validate_import_attributes_cb)(tc_scope, &attributes);
}
}
if tc_scope.has_caught() {
let exception = tc_scope.exception().unwrap();
let exception = v8::Global::new(tc_scope, exception);
return Err(ModuleError::Exception(exception));
}
let module_specifier = match self.resolve(
&import_specifier,
name.as_ref(),
if is_dynamic_import {
ResolutionKind::DynamicImport
} else {
ResolutionKind::Import
},
) {
Ok(s) => s,
Err(e) => return Err(ModuleError::Core(e)),
};
let requested_module_type =
get_requested_module_type_from_attributes(&attributes);
let referrer_source_offset = if let ModuleType::Wasm = module_type {
// Wasm sources will have been rendered to synthetic JS modules, so any
// `ModuleRequest::referrer:source_offset`s we get from v8 are not
// applicable to user code. Disregard it.
None
} else {
Some(module_request.get_source_offset())
};
let request = ModuleRequest {
reference: ModuleReference {
specifier: module_specifier,
requested_module_type,
},
specifier_key: Some(import_specifier),
referrer_source_offset,
phase: match module_request.get_phase() {
v8::ModuleImportPhase::kEvaluation => ModuleImportPhase::Evaluation,
v8::ModuleImportPhase::kSource => ModuleImportPhase::Source,
v8::ModuleImportPhase::kDefer => ModuleImportPhase::Defer,
},
};
requests.push(request);
}
let handle = v8::Global::<v8::Module>::new(tc_scope, module);
let id = self.data.borrow_mut().create_module_info(
name,
module_type,
handle,
main,
requests,
);
Ok(id)
}
pub(crate) fn new_wasm_module_source(
&self,
scope: &mut v8::PinScope,
module_reference: &ModuleReference,
mut loaded_source: ModuleSource,
) -> Result<ModuleSource, ModuleError> {
if let Some(module_url_found) = loaded_source.cheap_copy_module_url_found()
{
self.data.borrow_mut().alias(
loaded_source.cheap_copy_module_url_specified(),
&loaded_source.module_type.clone().into(),
module_url_found,
);
}
let reference_key = ModuleSourceKey::from_reference(module_reference);
if self.data.borrow().sources.contains_key(&reference_key) {
return Ok(loaded_source);
}
let loaded_key = ModuleSourceKey::from_loaded_source(&mut loaded_source);
if let Some(source) = self.data.borrow().sources.get(&loaded_key).cloned() {
self.data.borrow_mut().sources.insert(reference_key, source);
return Ok(loaded_source);
}
let ModuleSourceCode::Bytes(code) = &loaded_source.code else {
return Err(ModuleError::Concrete(ModuleConcreteError::WasmNotBytes));
};
let Some(wasm_module) =
v8::WasmModuleObject::compile(scope, code.as_bytes())
else {
return Err(
ModuleConcreteError::WasmCompile(loaded_key.name.to_string()).into(),
);
};
let wasm_module_object: v8::Local<v8::Object> = wasm_module.into();
let wasm_module_object_global = v8::Global::new(scope, wasm_module_object);
let source = Rc::new(wasm_module_object_global);
{
let mut data = self.data.borrow_mut();
data.sources.insert(reference_key, source.clone());
data.sources.insert(loaded_key, source);
}
Ok(loaded_source)
}
pub(crate) fn new_wasm_module(
&self,
scope: &mut v8::PinScope,
name: ModuleName,
source: ModuleSourceCode,
is_dynamic_import: bool,
) -> Result<ModuleId, ModuleError> {
let bytes = source.as_bytes();
let wasm_module_analysis = WasmDeps::parse(
bytes,
wasm_dep_analyzer::ParseOptions { skip_types: true },
)
.map_err(ModuleConcreteError::WasmParse)?;
let js_wasm_module_source =
render_js_wasm_module(name.as_str(), wasm_module_analysis);
self.new_module_from_js_source(
scope,
false,
ModuleType::Wasm,
name,
js_wasm_module_source.into(),
is_dynamic_import,
None,
)
}
pub(crate) fn new_json_module(
&self,
scope: &mut v8::PinScope,
name: impl IntoModuleName,
code: impl IntoModuleCodeString,
) -> Result<ModuleId, ModuleError> {
let name = name.into_module_name();
let code = code.into_module_code();
let source_str = v8::String::new_from_utf8(
scope,
strip_bom(code.as_bytes()),
v8::NewStringType::Normal,
)
.unwrap();
v8::tc_scope!(let tc_scope, scope);
let parsed_json = match v8::json::parse(tc_scope, source_str) {
Some(parsed_json) => parsed_json,
None => {
assert!(tc_scope.has_caught());
let exception = tc_scope.exception().unwrap();
let exception = v8::Global::new(tc_scope, exception);
return Err(ModuleError::Exception(exception));
}
};
let exports = vec![(ascii_str!("default"), parsed_json)];
Ok(self.new_synthetic_module(tc_scope, name, ModuleType::Json, exports))
}
#[allow(clippy::unnecessary_wraps)]
pub(crate) fn new_text_module(
&self,
scope: &mut v8::PinScope,
name: impl IntoModuleName,
code: impl IntoModuleCodeString,
) -> Result<ModuleId, ModuleError> {
let name = name.into_module_name();
let code = code.into_module_code();
// TODO(bartlomieju): would be much better if the string was ensured to not contain
// BOM, then we could use a more efficient string type with `FastString::v8_string`.
let source_str = v8::String::new_from_utf8(
scope,
strip_bom(code.as_bytes()),
v8::NewStringType::Normal,
)
.unwrap();
let source_str_local = v8::Local::new(scope, source_str);
let source_value_local = v8::Local::<v8::Value>::from(source_str_local);
let exports = vec![(ascii_str!("default"), source_value_local)];
Ok(self.new_synthetic_module(scope, name, ModuleType::Text, exports))
}
#[allow(clippy::unnecessary_wraps)]
pub(crate) fn new_bytes_module(
&self,
scope: &mut v8::PinScope,
name: impl IntoModuleName,
code: ModuleCodeBytes,
) -> Result<ModuleId, ModuleError> {
let name = name.into_module_name();
let (buf_len, backing_store) = match code {
ModuleCodeBytes::Static(bytes) => (
bytes.len(),
v8::ArrayBuffer::new_backing_store_from_vec(bytes.to_vec()),
),
ModuleCodeBytes::Boxed(bytes) => (
bytes.len(),
v8::ArrayBuffer::new_backing_store_from_boxed_slice(bytes),
),
ModuleCodeBytes::Arc(bytes) => (
bytes.len(),
v8::ArrayBuffer::new_backing_store_from_vec(bytes.to_vec()),
),
};
let backing_store_shared = backing_store.make_shared();
let ab = v8::ArrayBuffer::with_backing_store(scope, &backing_store_shared);
let uint8_array = v8::Uint8Array::new(scope, ab, 0, buf_len).unwrap();
let value: v8::Local<v8::Value> = uint8_array.into();
let exports = vec![(ascii_str!("default"), value)];
Ok(self.new_synthetic_module(scope, name, ModuleType::Bytes, exports))
}
pub(crate) fn instantiate_module<'s, 'i>(
&self,
scope: &mut v8::PinScope<'s, 'i>,
id: ModuleId,
) -> Result<(), v8::Global<v8::Value>> {
v8::tc_scope!(let tc_scope, scope);
let module = self
.get_handle(id)
.map(|handle| v8::Local::new(tc_scope, handle))
.expect("ModuleInfo not found");
if module.get_status() == v8::ModuleStatus::Errored {