dom/base/nsWrapperCache.cpp@129ffea94266 (annotated)
dom/base/nsWrapperCache.cpp
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #include "nsWrapperCacheInlines.h" |
| michael@0 | 8 | |
| michael@0 | 9 | #include "jsproxy.h" |
| michael@0 | 10 | #include "mozilla/dom/DOMJSProxyHandler.h" |
| michael@0 | 11 | #include "mozilla/HoldDropJSObjects.h" |
| michael@0 | 12 | #include "nsCycleCollectionTraversalCallback.h" |
| michael@0 | 13 | #include "nsCycleCollector.h" |
| michael@0 | 14 | |
| michael@0 | 15 | using namespace mozilla; |
| michael@0 | 16 | using namespace mozilla::dom; |
| michael@0 | 17 | |
| michael@0 | 18 | /* static */ void |
| michael@0 | 19 | nsWrapperCache::HoldJSObjects(void* aScriptObjectHolder, |
| michael@0 | 20 | nsScriptObjectTracer* aTracer) |
| michael@0 | 21 | { |
| michael@0 | 22 | cyclecollector::HoldJSObjectsImpl(aScriptObjectHolder, aTracer); |
| michael@0 | 23 | } |
| michael@0 | 24 | |
| michael@0 | 25 | void |
| michael@0 | 26 | nsWrapperCache::ReleaseWrapper(void* aScriptObjectHolder) |
| michael@0 | 27 | { |
| michael@0 | 28 | if (PreservingWrapper()) { |
| michael@0 | 29 | // PreserveWrapper puts new DOM bindings in the JS holders hash, but they |
| michael@0 | 30 | // can also be in the DOM expando hash, so we need to try to remove them |
| michael@0 | 31 | // from both here. |
| michael@0 | 32 | JSObject* obj = GetWrapperPreserveColor(); |
| michael@0 | 33 | if (IsDOMBinding() && obj && js::IsProxy(obj)) { |
| michael@0 | 34 | DOMProxyHandler::GetAndClearExpandoObject(obj); |
| michael@0 | 35 | } |
| michael@0 | 36 | SetPreservingWrapper(false); |
| michael@0 | 37 | cyclecollector::DropJSObjectsImpl(aScriptObjectHolder); |
| michael@0 | 38 | } |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | #ifdef DEBUG |
| michael@0 | 42 | |
| michael@0 | 43 | class DebugWrapperTraversalCallback : public nsCycleCollectionTraversalCallback |
| michael@0 | 44 | { |
| michael@0 | 45 | public: |
| michael@0 | 46 | DebugWrapperTraversalCallback(void* aWrapper) |
| michael@0 | 47 | : mFound(false) |
| michael@0 | 48 | , mWrapper(aWrapper) |
| michael@0 | 49 | { |
| michael@0 | 50 | mFlags = WANT_ALL_TRACES; |
| michael@0 | 51 | } |
| michael@0 | 52 | |
| michael@0 | 53 | NS_IMETHOD_(void) DescribeRefCountedNode(nsrefcnt aRefCount, |
| michael@0 | 54 | const char* aObjName) |
| michael@0 | 55 | { |
| michael@0 | 56 | } |
| michael@0 | 57 | NS_IMETHOD_(void) DescribeGCedNode(bool aIsMarked, |
| michael@0 | 58 | const char* aObjName, |
| michael@0 | 59 | uint64_t aCompartmentAddress) |
| michael@0 | 60 | { |
| michael@0 | 61 | } |
| michael@0 | 62 | |
| michael@0 | 63 | NS_IMETHOD_(void) NoteJSChild(void* aChild) |
| michael@0 | 64 | { |
| michael@0 | 65 | if (aChild == mWrapper) { |
| michael@0 | 66 | mFound = true; |
| michael@0 | 67 | } |
| michael@0 | 68 | } |
| michael@0 | 69 | NS_IMETHOD_(void) NoteXPCOMChild(nsISupports* aChild) |
| michael@0 | 70 | { |
| michael@0 | 71 | } |
| michael@0 | 72 | NS_IMETHOD_(void) NoteNativeChild(void* aChild, |
| michael@0 | 73 | nsCycleCollectionParticipant* aHelper) |
| michael@0 | 74 | { |
| michael@0 | 75 | } |
| michael@0 | 76 | |
| michael@0 | 77 | NS_IMETHOD_(void) NoteNextEdgeName(const char* aName) |
| michael@0 | 78 | { |
| michael@0 | 79 | } |
| michael@0 | 80 | |
| michael@0 | 81 | bool mFound; |
| michael@0 | 82 | |
| michael@0 | 83 | private: |
| michael@0 | 84 | void* mWrapper; |
| michael@0 | 85 | }; |
| michael@0 | 86 | |
| michael@0 | 87 | static void |
| michael@0 | 88 | DebugWrapperTraceCallback(void* aP, const char* aName, void* aClosure) |
| michael@0 | 89 | { |
| michael@0 | 90 | DebugWrapperTraversalCallback* callback = |
| michael@0 | 91 | static_cast<DebugWrapperTraversalCallback*>(aClosure); |
| michael@0 | 92 | callback->NoteJSChild(aP); |
| michael@0 | 93 | } |
| michael@0 | 94 | |
| michael@0 | 95 | void |
| michael@0 | 96 | nsWrapperCache::CheckCCWrapperTraversal(void* aScriptObjectHolder, |
| michael@0 | 97 | nsScriptObjectTracer* aTracer) |
| michael@0 | 98 | { |
| michael@0 | 99 | JSObject* wrapper = GetWrapper(); |
| michael@0 | 100 | if (!wrapper) { |
| michael@0 | 101 | return; |
| michael@0 | 102 | } |
| michael@0 | 103 | |
| michael@0 | 104 | DebugWrapperTraversalCallback callback(wrapper); |
| michael@0 | 105 | |
| michael@0 | 106 | aTracer->Traverse(aScriptObjectHolder, callback); |
| michael@0 | 107 | MOZ_ASSERT(callback.mFound, |
| michael@0 | 108 | "Cycle collection participant didn't traverse to preserved " |
| michael@0 | 109 | "wrapper! This will probably crash."); |
| michael@0 | 110 | |
| michael@0 | 111 | callback.mFound = false; |
| michael@0 | 112 | aTracer->Trace(aScriptObjectHolder, |
| michael@0 | 113 | TraceCallbackFunc(DebugWrapperTraceCallback), &callback); |
| michael@0 | 114 | MOZ_ASSERT(callback.mFound, |
| michael@0 | 115 | "Cycle collection participant didn't trace preserved wrapper! " |
| michael@0 | 116 | "This will probably crash."); |
| michael@0 | 117 | } |
| michael@0 | 118 | |
| michael@0 | 119 | #endif // DEBUG |
