Bug 800187 (part 1) - Add memory reporter for the nsStyleSheetService. r=bz.

--HG--
extra : rebase_source : fc5c04daa0fd919f11470b090e38e9e8a5f19db6

layout/base/nsStyleSheetService.cpp

@@ -19,6 +19,24 @@
 #include "nsNetUtil.h"
 #include "nsIObserverService.h"
 #include "nsLayoutStatics.h"
+#include "nsIMemoryReporter.h"
+
+NS_MEMORY_REPORTER_MALLOC_SIZEOF_FUN(LayoutStyleSheetServiceMallocSizeOf,
+                                     "layout/style-sheet-service")
+
+static int64_t
+GetStyleSheetServiceSize()
+{
+  return nsStyleSheetService::SizeOfIncludingThis(
+           LayoutStyleSheetServiceMallocSizeOf);
+}
+
+NS_MEMORY_REPORTER_IMPLEMENT(StyleSheetService,
+  "explicit/layout/style-sheet-service",
+  KIND_HEAP,
+  nsIMemoryReporter::UNITS_BYTES,
+  GetStyleSheetServiceSize,
+  "Memory used for style sheets held by the style sheet service.")
 
 nsStyleSheetService *nsStyleSheetService::gInstance = nullptr;
 
@@ -28,12 +46,18 @@ nsStyleSheetService::nsStyleSheetService()
   NS_ASSERTION(!gInstance, "Someone is using CreateInstance instead of GetService");
   gInstance = this;
   nsLayoutStatics::AddRef();
+
+  mReporter = new NS_MEMORY_REPORTER_NAME(StyleSheetService);
+  (void)::NS_RegisterMemoryReporter(mReporter);
 }
 
 nsStyleSheetService::~nsStyleSheetService()
 {
   gInstance = nullptr;
   nsLayoutStatics::Release();
+
+  (void)::NS_UnregisterMemoryReporter(mReporter);
+  mReporter = nullptr;
 }
 
 NS_IMPL_ISUPPORTS1(nsStyleSheetService, nsIStyleSheetService)
@@ -183,3 +207,34 @@ nsStyleSheetService::UnregisterSheet(nsIURI *sheetURI, uint32_t aSheetType)
 
   return NS_OK;
 }
+
+size_t
+nsStyleSheetService::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf)
+{
+  if (!nsStyleSheetService::gInstance) {
+    return 0;
+  }
+
+  return nsStyleSheetService::gInstance->
+      SizeOfIncludingThisHelper(aMallocSizeOf);
+}
+
+static size_t
+SizeOfElementIncludingThis(nsIStyleSheet* aElement,
+                           nsMallocSizeOfFun aMallocSizeOf, void *aData)
+{
+    return aElement->SizeOfIncludingThis(aMallocSizeOf);
+}
+
+size_t
+nsStyleSheetService::SizeOfIncludingThisHelper(nsMallocSizeOfFun aMallocSizeOf) const
+{
+  size_t n = aMallocSizeOf(this);
+  n += mSheets[AGENT_SHEET].SizeOfExcludingThis(SizeOfElementIncludingThis,
+                                                aMallocSizeOf);
+  n += mSheets[USER_SHEET].SizeOfExcludingThis(SizeOfElementIncludingThis,
+                                               aMallocSizeOf);
+  return n;
+}
+
+

layout/base/nsStyleSheetService.h

@@ -22,6 +22,8 @@ class nsICategoryManager;
 #define NS_STYLESHEETSERVICE_CONTRACTID \
   "@mozilla.org/content/style-sheet-service;1"
 
+class nsIMemoryReporter;
+
 class nsStyleSheetService MOZ_FINAL : public nsIStyleSheetService
 {
  public:
@@ -36,6 +38,8 @@ class nsStyleSheetService MOZ_FINAL : public nsIStyleSheetService
   nsCOMArray<nsIStyleSheet>* AgentStyleSheets() { return &mSheets[AGENT_SHEET]; }
   nsCOMArray<nsIStyleSheet>* UserStyleSheets() { return &mSheets[USER_SHEET]; }
 
+  static size_t SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf);
+
   static nsStyleSheetService *gInstance;
 
  private:
@@ -53,7 +57,11 @@ class nsStyleSheetService MOZ_FINAL : public nsIStyleSheetService
   NS_HIDDEN_(nsresult) LoadAndRegisterSheetInternal(nsIURI *aSheetURI,
                                                     uint32_t aSheetType);
 
+  size_t SizeOfIncludingThisHelper(nsMallocSizeOfFun aMallocSizeOf) const;
+
   nsCOMArray<nsIStyleSheet> mSheets[2];
+
+  nsIMemoryReporter* mReporter;
 };
 
 #endif

layout/style/nsLayoutStylesheetCache.cpp

@@ -26,7 +26,7 @@ GetStylesheetCacheSize()
            LayoutStyleSheetCacheMallocSizeOf);
 }
 
-NS_MEMORY_REPORTER_IMPLEMENT(Sheets,
+NS_MEMORY_REPORTER_IMPLEMENT(StyleSheetCache,
   "explicit/layout/style-sheet-cache",
   KIND_HEAP,
   nsIMemoryReporter::UNITS_BYTES,
@@ -161,11 +161,12 @@ nsLayoutStylesheetCache::Shutdown()
 size_t
 nsLayoutStylesheetCache::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf)
 {
-  if (nsLayoutStylesheetCache::gStyleCache) {
+  if (!nsLayoutStylesheetCache::gStyleCache) {
+    return 0;
+  }
+
   return nsLayoutStylesheetCache::gStyleCache->
       SizeOfIncludingThisHelper(aMallocSizeOf);
-  }
-  return 0;
 }
 
 size_t
@@ -226,14 +227,14 @@ nsLayoutStylesheetCache::nsLayoutStylesheetCache()
   }
   NS_ASSERTION(mFullScreenOverrideSheet, "Could not load full-screen-override.css");
 
-  mSheetsReporter = new NS_MEMORY_REPORTER_NAME(Sheets);
-  (void)::NS_RegisterMemoryReporter(mSheetsReporter);
+  mReporter = new NS_MEMORY_REPORTER_NAME(StyleSheetCache);
+  (void)::NS_RegisterMemoryReporter(mReporter);
 }
 
 nsLayoutStylesheetCache::~nsLayoutStylesheetCache()
 {
-  (void)::NS_UnregisterMemoryReporter(mSheetsReporter);
-  mSheetsReporter = nullptr;
+  (void)::NS_UnregisterMemoryReporter(mReporter);
+  mReporter = nullptr;
 }
 
 void

layout/style/nsLayoutStylesheetCache.h

@@ -63,7 +63,7 @@ private:
   nsRefPtr<nsCSSStyleSheet> mQuirkSheet;
   nsRefPtr<nsCSSStyleSheet> mFullScreenOverrideSheet;
 
-  nsIMemoryReporter* mSheetsReporter;
+  nsIMemoryReporter* mReporter;
 };
 
 #endif