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290 lines
11 KiB
C++
290 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Mounir Lamouri <mounir.lamouri@mozilla.com> (original author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsWindowMemoryReporter.h"
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#include "nsGlobalWindow.h"
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nsWindowMemoryReporter::nsWindowMemoryReporter()
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{
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}
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NS_IMPL_ISUPPORTS1(nsWindowMemoryReporter, nsIMemoryMultiReporter)
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/* static */
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void
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nsWindowMemoryReporter::Init()
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{
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// The memory reporter manager is going to own this object.
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NS_RegisterMemoryMultiReporter(new nsWindowMemoryReporter());
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}
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static void
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AppendWindowURI(nsGlobalWindow *aWindow, nsACString& aStr)
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{
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nsCOMPtr<nsIDocument> doc = do_QueryInterface(aWindow->GetExtantDocument());
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nsCOMPtr<nsIURI> uri;
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if (doc) {
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uri = doc->GetDocumentURI();
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}
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if (!uri) {
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nsIPrincipal *principal = aWindow->GetPrincipal();
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if (principal) {
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principal->GetURI(getter_AddRefs(uri));
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}
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}
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if (uri) {
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nsCString spec;
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uri->GetSpec(spec);
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// A hack: replace forward slashes with '\\' so they aren't
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// treated as path separators. Users of the reporters
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// (such as about:memory) have to undo this change.
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spec.ReplaceChar('/', '\\');
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aStr += spec;
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} else {
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aStr += NS_LITERAL_CSTRING("[system]");
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}
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}
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NS_MEMORY_REPORTER_MALLOC_SIZEOF_FUN(DOMStyleMallocSizeOf, "windows")
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static nsresult
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CollectWindowReports(nsGlobalWindow *aWindow,
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nsWindowSizes *aWindowTotalSizes,
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nsIMemoryMultiReporterCallback *aCb,
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nsISupports *aClosure)
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{
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// DOM window objects fall into one of three categories:
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// - "active" windows are currently either displayed in an active
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// tab, or a child of such a window.
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// - "cached" windows are in the fastback cache.
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// - "other" windows are closed (or navigated away from w/o being
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// cached) yet held alive by either a website or our code. The
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// latter case may be a memory leak, but not necessarily.
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//
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// For each window we show how much memory the window and its
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// document, etc, use, and we report those per URI, where the URI is
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// the document URI, if available, or the codebase of the principal in
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// the window. In the case where we're unable to find a URI we're
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// dealing with a chrome window with no document in it (or somesuch),
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// and for that we make the URI be the string "[system]".
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//
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// Outer windows are lumped in with inner windows, because the amount
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// of memory used by outer windows is small.
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//
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// The path we give to the reporter callback for "active" and "cached"
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// windows (both inner and outer) is as follows:
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//
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// explicit/window-objects/top(<top-outer-uri>, id=<top-outer-id>)/<category>/window(<window-uri>)/...
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//
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// The path we give for "other" windows is as follows:
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//
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// explicit/window-objects/top(none)/window(<window-uri>)/...
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//
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// Where:
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// - <category> is "active" or "cached", as described above.
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// - <top-outer-id> is the window id (nsPIDOMWindow::WindowID()) of
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// the top outer window (i.e. tab, or top level chrome window).
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// - <top-inner-uri> is the URI of the top outer window. Excepting
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// special windows (such as browser.xul or hiddenWindow.html) it's
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// what the address bar shows for the tab.
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// - <window-uri> is the URI of aWindow.
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//
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// Exposing the top-outer-id ensures that each tab gets its own
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// sub-tree, even if multiple tabs are showing the same URI.
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nsCAutoString windowPath("explicit/window-objects/");
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nsGlobalWindow *top = aWindow->GetTop();
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windowPath += NS_LITERAL_CSTRING("top(");
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if (top) {
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AppendWindowURI(top, windowPath);
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windowPath += NS_LITERAL_CSTRING(", id=");
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windowPath.AppendInt(top->WindowID());
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} else {
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windowPath += NS_LITERAL_CSTRING("none");
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}
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windowPath += NS_LITERAL_CSTRING(")/");
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nsIDocShell *docShell = aWindow->GetDocShell();
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if (docShell) {
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MOZ_ASSERT(top, "'cached' or 'active' window lacks a top window");
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windowPath += aWindow->IsFrozen() ? NS_LITERAL_CSTRING("cached/")
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: NS_LITERAL_CSTRING("active/");
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} else {
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MOZ_ASSERT(!top, "'other' window has a top window");
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}
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windowPath += NS_LITERAL_CSTRING("window(");
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AppendWindowURI(aWindow, windowPath);
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windowPath += NS_LITERAL_CSTRING(")");
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#define REPORT(_pathTail, _amount, _desc) \
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do { \
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if (_amount > 0) { \
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nsCAutoString path(windowPath); \
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path += _pathTail; \
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nsresult rv; \
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rv = aCb->Callback(EmptyCString(), path, nsIMemoryReporter::KIND_HEAP,\
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nsIMemoryReporter::UNITS_BYTES, _amount, \
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NS_LITERAL_CSTRING(_desc), aClosure); \
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NS_ENSURE_SUCCESS(rv, rv); \
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} \
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} while (0)
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nsWindowSizes windowSizes(DOMStyleMallocSizeOf);
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aWindow->SizeOfIncludingThis(&windowSizes);
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REPORT("/dom", windowSizes.mDOM,
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"Memory used by a window and the DOM within it.");
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aWindowTotalSizes->mDOM += windowSizes.mDOM;
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REPORT("/style-sheets", windowSizes.mStyleSheets,
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"Memory used by style sheets within a window.");
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aWindowTotalSizes->mStyleSheets += windowSizes.mStyleSheets;
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REPORT("/layout/arenas", windowSizes.mLayoutArenas,
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"Memory used by layout PresShell, PresContext, and other related "
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"areas within a window.");
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aWindowTotalSizes->mLayoutArenas += windowSizes.mLayoutArenas;
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REPORT("/layout/style-sets", windowSizes.mLayoutStyleSets,
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"Memory used by style sets within a window.");
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aWindowTotalSizes->mLayoutStyleSets += windowSizes.mLayoutStyleSets;
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REPORT("/layout/text-runs", windowSizes.mLayoutTextRuns,
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"Memory used for text-runs (glyph layout) in the PresShell's frame "
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"tree, within a window.");
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aWindowTotalSizes->mLayoutTextRuns += windowSizes.mLayoutTextRuns;
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#undef REPORT
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return NS_OK;
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}
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typedef nsTArray< nsRefPtr<nsGlobalWindow> > WindowArray;
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static
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PLDHashOperator
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GetWindows(const PRUint64& aId, nsGlobalWindow*& aWindow, void* aClosure)
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{
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((WindowArray *)aClosure)->AppendElement(aWindow);
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return PL_DHASH_NEXT;
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}
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NS_IMETHODIMP
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nsWindowMemoryReporter::GetName(nsACString &aName)
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{
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aName.AssignLiteral("window-objects");
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowMemoryReporter::CollectReports(nsIMemoryMultiReporterCallback* aCb,
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nsISupports* aClosure)
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{
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nsGlobalWindow::WindowByIdTable* windowsById =
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nsGlobalWindow::GetWindowsTable();
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NS_ENSURE_TRUE(windowsById, NS_OK);
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// Hold on to every window in memory so that window objects can't be
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// destroyed while we're calling the memory reporter callback.
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WindowArray windows;
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windowsById->Enumerate(GetWindows, &windows);
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// Collect window memory usage.
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nsRefPtr<nsGlobalWindow> *w = windows.Elements();
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nsRefPtr<nsGlobalWindow> *end = w + windows.Length();
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nsWindowSizes windowTotalSizes(NULL);
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for (; w != end; ++w) {
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nsresult rv = CollectWindowReports(*w, &windowTotalSizes, aCb, aClosure);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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#define REPORT(_path, _amount, _desc) \
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do { \
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nsresult rv; \
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rv = aCb->Callback(EmptyCString(), NS_LITERAL_CSTRING(_path), \
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nsIMemoryReporter::KIND_OTHER, \
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nsIMemoryReporter::UNITS_BYTES, _amount, \
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NS_LITERAL_CSTRING(_desc), aClosure); \
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NS_ENSURE_SUCCESS(rv, rv); \
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} while (0)
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REPORT("window-objects-dom", windowTotalSizes.mDOM,
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"Memory used for the DOM within windows. "
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"This is the sum of all windows' 'dom' numbers.");
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REPORT("window-objects-style-sheets", windowTotalSizes.mStyleSheets,
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"Memory used for style sheets within windows. "
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"This is the sum of all windows' 'style-sheets' numbers.");
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REPORT("window-objects-layout-arenas", windowTotalSizes.mLayoutArenas,
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"Memory used by layout PresShell, PresContext, and other related "
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"areas within windows. This is the sum of all windows' "
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"'layout/arenas' numbers.");
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REPORT("window-objects-layout-style-sets", windowTotalSizes.mLayoutStyleSets,
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"Memory used for style sets within windows. "
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"This is the sum of all windows' 'layout/style-sets' numbers.");
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REPORT("window-objects-layout-text-runs", windowTotalSizes.mLayoutTextRuns,
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"Memory used for text runs within windows. "
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"This is the sum of all windows' 'layout/text-runs' numbers.");
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#undef REPORT
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowMemoryReporter::GetExplicitNonHeap(PRInt64* aAmount)
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{
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// This reporter only measures heap memory.
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*aAmount = 0;
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return NS_OK;
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}
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