1 files changed, 134 insertions, 0 deletions
diff --git a/dom/performance/PerformanceResourceTiming.cpp b/dom/performance/PerformanceResourceTiming.cpp
new file mode 100644
index 0000000000..40a0b77382
--- /dev/null
+++ b/dom/performance/PerformanceResourceTiming.cpp
@@ -0,0 +1,134 @@
+/* -*- 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 "PerformanceResourceTiming.h"
+#include "mozilla/dom/PerformanceResourceTimingBinding.h"
+#include "nsNetUtil.h"
+#include "nsArrayUtils.h"
+
+using namespace mozilla::dom;
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(PerformanceResourceTiming, PerformanceEntry,
+                                   mPerformance)
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(PerformanceResourceTiming,
+                                               PerformanceEntry)
+NS_IMPL_CYCLE_COLLECTION_TRACE_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PerformanceResourceTiming)
+NS_INTERFACE_MAP_END_INHERITING(PerformanceEntry)
+
+NS_IMPL_ADDREF_INHERITED(PerformanceResourceTiming, PerformanceEntry)
+NS_IMPL_RELEASE_INHERITED(PerformanceResourceTiming, PerformanceEntry)
+
+PerformanceResourceTiming::PerformanceResourceTiming(
+    UniquePtr<PerformanceTimingData>&& aPerformanceTiming,
+    Performance* aPerformance, const nsAString& aName)
+    : PerformanceEntry(aPerformance->GetParentObject(), aName, u"resource"_ns),
+      mTimingData(std::move(aPerformanceTiming)),
+      mPerformance(aPerformance) {
+  MOZ_RELEASE_ASSERT(mTimingData);
+  MOZ_ASSERT(aPerformance, "Parent performance object should be provided");
+  if (NS_IsMainThread()) {
+    // Used to check if an addon content script has access to this timing.
+    // We don't need it in workers, and ignore mOriginalURI if null.
+    NS_NewURI(getter_AddRefs(mOriginalURI), aName);
+  }
+}
+
+PerformanceResourceTiming::~PerformanceResourceTiming() = default;
+
+DOMHighResTimeStamp PerformanceResourceTiming::FetchStart() const {
+  if (mTimingData->TimingAllowed()) {
+    return mTimingData->FetchStartHighRes(mPerformance);
+  }
+  return StartTime();
+}
+
+DOMHighResTimeStamp PerformanceResourceTiming::StartTime() const {
+  // Force the start time to be the earliest of:
+  //  - RedirectStart
+  //  - WorkerStart
+  //  - AsyncOpen
+  // Ignore zero values.  The RedirectStart and WorkerStart values
+  // can come from earlier redirected channels prior to the AsyncOpen
+  // time being recorded.
+  if (mCachedStartTime.isNothing()) {
+    DOMHighResTimeStamp redirect =
+        mTimingData->RedirectStartHighRes(mPerformance);
+    redirect = redirect ? redirect : DBL_MAX;
+
+    DOMHighResTimeStamp worker = mTimingData->WorkerStartHighRes(mPerformance);
+    worker = worker ? worker : DBL_MAX;
+
+    DOMHighResTimeStamp asyncOpen = mTimingData->AsyncOpenHighRes(mPerformance);
+
+    mCachedStartTime.emplace(std::min(asyncOpen, std::min(redirect, worker)));
+  }
+  return mCachedStartTime.value();
+}
+
+JSObject* PerformanceResourceTiming::WrapObject(
+    JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
+  return PerformanceResourceTiming_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+size_t PerformanceResourceTiming::SizeOfIncludingThis(
+    mozilla::MallocSizeOf aMallocSizeOf) const {
+  return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+}
+
+size_t PerformanceResourceTiming::SizeOfExcludingThis(
+    mozilla::MallocSizeOf aMallocSizeOf) const {
+  return PerformanceEntry::SizeOfExcludingThis(aMallocSizeOf) +
+         mInitiatorType.SizeOfExcludingThisIfUnshared(aMallocSizeOf) +
+         mTimingData->NextHopProtocol().SizeOfExcludingThisIfUnshared(
+             aMallocSizeOf);
+}
+
+void PerformanceResourceTiming::GetServerTiming(
+    nsTArray<RefPtr<PerformanceServerTiming>>& aRetval,
+    Maybe<nsIPrincipal*>& aSubjectPrincipal) {
+  aRetval.Clear();
+  if (!TimingAllowedForCaller(aSubjectPrincipal)) {
+    return;
+  }
+
+  nsTArray<nsCOMPtr<nsIServerTiming>> serverTimingArray =
+      mTimingData->GetServerTiming();
+  uint32_t length = serverTimingArray.Length();
+  for (uint32_t index = 0; index < length; ++index) {
+    nsCOMPtr<nsIServerTiming> serverTiming = serverTimingArray.ElementAt(index);
+    MOZ_ASSERT(serverTiming);
+
+    aRetval.AppendElement(
+        new PerformanceServerTiming(GetParentObject(), serverTiming));
+  }
+}
+
+bool PerformanceResourceTiming::TimingAllowedForCaller(
+    Maybe<nsIPrincipal*>& aCaller) const {
+  if (mTimingData->TimingAllowed()) {
+    return true;
+  }
+
+  // Check if the addon has permission to access the cross-origin resource.
+  return mOriginalURI && aCaller.isSome() &&
+         BasePrincipal::Cast(aCaller.value())->AddonAllowsLoad(mOriginalURI);
+}
+
+bool PerformanceResourceTiming::ReportRedirectForCaller(
+    Maybe<nsIPrincipal*>& aCaller, bool aEnsureSameOriginAndIgnoreTAO) const {
+  if (mTimingData->ShouldReportCrossOriginRedirect(
+          aEnsureSameOriginAndIgnoreTAO)) {
+    return true;
+  }
+
+  // Only report cross-origin redirect if the addon has <all_urls> permission.
+  return aCaller.isSome() &&
+         BasePrincipal::Cast(aCaller.value())
+             ->AddonHasPermission(nsGkAtoms::all_urlsPermission);
+}