PageInformation.cpp (1900B)
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #include "PageInformation.h" 8 9 #include "mozilla/BaseProfiler.h" 10 #include "mozilla/BaseProfileJSONWriter.h" 11 12 namespace mozilla { 13 namespace baseprofiler { 14 15 PageInformation::PageInformation(uint64_t aTabID, uint64_t aInnerWindowID, 16 const std::string& aUrl, 17 uint64_t aEmbedderInnerWindowID) 18 : mTabID(aTabID), 19 mInnerWindowID(aInnerWindowID), 20 mUrl(aUrl), 21 mEmbedderInnerWindowID(aEmbedderInnerWindowID), 22 mRefCnt(0) {} 23 24 bool PageInformation::Equals(PageInformation* aOtherPageInfo) const { 25 // It's enough to check inner window IDs because they are unique for each 26 // page. Therefore, we don't have to check the tab ID or url. 27 return InnerWindowID() == aOtherPageInfo->InnerWindowID(); 28 } 29 30 void PageInformation::StreamJSON(SpliceableJSONWriter& aWriter) const { 31 aWriter.StartObjectElement(); 32 // Here, we are converting uint64_t to double. Both tab and Inner 33 // Window IDs are created using `nsContentUtils::GenerateProcessSpecificId`, 34 // which is specifically designed to only use 53 of the 64 bits to be lossless 35 // when passed into and out of JS as a double. 36 aWriter.DoubleProperty("tabID", TabID()); 37 aWriter.DoubleProperty("innerWindowID", InnerWindowID()); 38 aWriter.StringProperty("url", Url()); 39 aWriter.DoubleProperty("embedderInnerWindowID", EmbedderInnerWindowID()); 40 aWriter.EndObject(); 41 } 42 43 size_t PageInformation::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const { 44 return aMallocSizeOf(this); 45 } 46 47 } // namespace baseprofiler 48 } // namespace mozilla