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Issue #618 - Keep track of which modules in a graph have been fetched using a visited set

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Ref: BZ 1365187
This commit is contained in:
Gaming4JC 2020-08-03 10:44:39 -04:00 • committed by Roy Tam
commit 6639e9cdac
4 changed files with 92 additions and 72 deletions
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31
dom/script/ModuleLoadRequest.h
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@ -8,6 +8,7 @@
#define mozilla_dom_ModuleLoadRequest_h
#include "mozilla/dom/ScriptLoader.h"
#include "nsURIHashKey.h"
#include "mozilla/MozPromise.h"
namespace mozilla {
@ -16,6 +17,16 @@ namespace dom {
class ModuleScript;
class ScriptLoader;
// A reference counted set of URLs we have visited in the process of loading a
// module graph.
class VisitedURLSet : public nsTHashtable<nsURIHashKey>
{
NS_INLINE_DECL_REFCOUNTING(VisitedURLSet)
private:
~VisitedURLSet() = default;
};
// A load request for a module, created for every top level module script and
// every module import. Load request can share a ModuleScript if there are
// multiple imports of the same module.
@ -31,12 +42,18 @@ public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ModuleLoadRequest, ScriptLoadRequest)
ModuleLoadRequest(nsIScriptElement* aElement,
// Create a top-level module load request.
ModuleLoadRequest(nsIURI* aURI,
nsIScriptElement* aElement,
uint32_t aVersion,
CORSMode aCORSMode,
const SRIMetadata& aIntegrity,
ScriptLoader* aLoader);
// Create a module load request for an imported module.
ModuleLoadRequest(nsIURI* aURI,
ModuleLoadRequest* aParent);
bool IsTopLevel() const {
return mIsTopLevel;
}
@ -55,7 +72,7 @@ private:
public:
// Is this a request for a top level module script or an import?
bool mIsTopLevel;
const bool mIsTopLevel;
// The base URL used for resolving relative module imports.
nsCOMPtr<nsIURI> mBaseURL;
@ -64,10 +81,6 @@ public:
// finishes.
RefPtr<ScriptLoader> mLoader;
// The importing module, or nullptr for top level module scripts. Used to
// implement the ancestor list checked when fetching module dependencies.
RefPtr<ModuleLoadRequest> mParent;
// Set to a module script object after a successful load or nullptr on
// failure.
RefPtr<ModuleScript> mModuleScript;
@ -79,9 +92,13 @@ public:
// Array of imported modules.
nsTArray<RefPtr<ModuleLoadRequest>> mImports;
// Set of module URLs visited while fetching the module graph this request is
// part of.
RefPtr<VisitedURLSet> mVisitedSet;
};
} // dom namespace
} // mozilla namespace
#endif // mozilla_dom_ModuleLoadRequest_h
#endif // mozilla_dom_ModuleLoadRequest_h