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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "ModuleLoadRequest.h"
#include "mozilla/HoldDropJSObjects.h"
#include "mozilla/dom/ScriptLoadContext.h"
#include "LoadedScript.h"
#include "LoadContextBase.h"
#include "ModuleLoaderBase.h"
namespace JS::loader {
#undef LOG
#define LOG(args) \
MOZ_LOG(ModuleLoaderBase::gModuleLoaderBaseLog, mozilla::LogLevel::Debug, \
args)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ModuleLoadRequest)
NS_INTERFACE_MAP_END_INHERITING(ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_CLASS(ModuleLoadRequest)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(ModuleLoadRequest,
ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mLoader, mModuleScript, mImports, mRootModule)
tmp->ClearDynamicImport();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(ModuleLoadRequest,
ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLoader, mModuleScript, mImports,
mRootModule)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(ModuleLoadRequest,
ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mDynamicReferencingPrivate)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mDynamicSpecifier)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mDynamicPromise)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_IMPL_ADDREF_INHERITED(ModuleLoadRequest, ScriptLoadRequest)
NS_IMPL_RELEASE_INHERITED(ModuleLoadRequest, ScriptLoadRequest)
/* static */
VisitedURLSet* ModuleLoadRequest::NewVisitedSetForTopLevelImport(nsIURI* aURI) {
auto set = new VisitedURLSet();
set->PutEntry(aURI);
return set;
}
ModuleLoadRequest::ModuleLoadRequest(
nsIURI* aURI, ScriptFetchOptions* aFetchOptions,
const mozilla::dom::SRIMetadata& aIntegrity, nsIURI* aReferrer,
LoadContextBase* aContext, bool aIsTopLevel, bool aIsDynamicImport,
ModuleLoaderBase* aLoader, VisitedURLSet* aVisitedSet,
ModuleLoadRequest* aRootModule)
: ScriptLoadRequest(ScriptKind::eModule, aURI, aFetchOptions, aIntegrity,
aReferrer, aContext),
mIsTopLevel(aIsTopLevel),
mIsDynamicImport(aIsDynamicImport),
mLoader(aLoader),
mRootModule(aRootModule),
mVisitedSet(aVisitedSet) {
MOZ_ASSERT(mLoader);
}
nsIGlobalObject* ModuleLoadRequest::GetGlobalObject() {
return mLoader->GetGlobalObject();
}
void ModuleLoadRequest::Cancel() {
ScriptLoadRequest::Cancel();
mModuleScript = nullptr;
CancelImports();
mReady.RejectIfExists(NS_ERROR_DOM_ABORT_ERR, __func__);
}
void ModuleLoadRequest::CancelImports() {
for (size_t i = 0; i < mImports.Length(); i++) {
mImports[i]->Cancel();
}
}
void ModuleLoadRequest::SetReady() {
// Mark a module as ready to execute. This means that this module and all it
// dependencies have had their source loaded, parsed as a module and the
// modules instantiated.
//
// The mReady promise is used to ensure that when all dependencies of a module
// have become ready, DependenciesLoaded is called on that module
// request. This is set up in StartFetchingModuleDependencies.
#ifdef DEBUG
for (size_t i = 0; i < mImports.Length(); i++) {
MOZ_ASSERT(mImports[i]->IsReadyToRun());
}
#endif
ScriptLoadRequest::SetReady();
mReady.ResolveIfExists(true, __func__);
}
void ModuleLoadRequest::ModuleLoaded() {
// A module that was found to be marked as fetching in the module map has now
// been loaded.
LOG(("ScriptLoadRequest (%p): Module loaded", this));
mModuleScript = mLoader->GetFetchedModule(mURI);
if (!mModuleScript || mModuleScript->HasParseError()) {
ModuleErrored();
return;
}
mLoader->StartFetchingModuleDependencies(this);
}
void ModuleLoadRequest::ModuleErrored() {
if (IsCanceled()) {
return;
}
LOG(("ScriptLoadRequest (%p): Module errored", this));
CheckModuleDependenciesLoaded();
MOZ_ASSERT(!mModuleScript || mModuleScript->HasParseError());
CancelImports();
SetReady();
LoadFinished();
}
void ModuleLoadRequest::DependenciesLoaded() {
if (IsCanceled()) {
return;
}
// The module and all of its dependencies have been successfully fetched and
// compiled.
LOG(("ScriptLoadRequest (%p): Module dependencies loaded", this));
MOZ_ASSERT(mModuleScript);
CheckModuleDependenciesLoaded();
SetReady();
LoadFinished();
}
void ModuleLoadRequest::CheckModuleDependenciesLoaded() {
LOG(("ScriptLoadRequest (%p): Check dependencies loaded", this));
if (!mModuleScript || mModuleScript->HasParseError()) {
return;
}
for (const auto& childRequest : mImports) {
ModuleScript* childScript = childRequest->mModuleScript;
if (!childScript) {
mModuleScript = nullptr;
LOG(("ScriptLoadRequest (%p): %p failed (load error)", this,
childRequest.get()));
return;
}
}
LOG(("ScriptLoadRequest (%p): all ok", this));
}
void ModuleLoadRequest::LoadFailed() {
// We failed to load the source text or an error occurred unrelated to the
// content of the module (e.g. OOM).
LOG(("ScriptLoadRequest (%p): Module load failed", this));
if (IsCanceled()) {
return;
}
MOZ_ASSERT(!IsReadyToRun());
MOZ_ASSERT(!mModuleScript);
Cancel();
LoadFinished();
}
void ModuleLoadRequest::LoadFinished() {
RefPtr<ModuleLoadRequest> request(this);
if (IsTopLevel() && IsDynamicImport()) {
mLoader->RemoveDynamicImport(request);
}
mLoader->OnModuleLoadComplete(request);
}
void ModuleLoadRequest::ClearDynamicImport() {
mDynamicReferencingPrivate = JS::UndefinedValue();
mDynamicSpecifier = nullptr;
mDynamicPromise = nullptr;
}
} // namespace JS::loader
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