The Tor Browser: js/src/gc/Barrier.cpp@129ffea94266

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.

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  * vim: set ts=8 sts=4 et sw=4 tw=99:

     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/. */

     7 #include "gc/Barrier.h"

     9 #include "jscompartment.h"

    10 #include "jsobj.h"

    12 #include "gc/Zone.h"

    14 namespace js {

    16 #ifdef DEBUG

    18 bool

    19 HeapValue::preconditionForSet(Zone *zone)

    20 {

    21     if (!value.isMarkable())

    22         return true;

    24     return ZoneOfValue(value) == zone ||

    25            zone->runtimeFromAnyThread()->isAtomsZone(ZoneOfValue(value));

    26 }

    28 bool

    29 HeapSlot::preconditionForSet(JSObject *owner, Kind kind, uint32_t slot)

    30 {

    31     return kind == Slot

    32          ? &owner->getSlotRef(slot) == this

    33          : &owner->getDenseElement(slot) == (const Value *)this;

    34 }

    36 bool

    37 HeapSlot::preconditionForSet(Zone *zone, JSObject *owner, Kind kind, uint32_t slot)

    38 {

    39     bool ok = kind == Slot

    40             ? &owner->getSlotRef(slot) == this

    41             : &owner->getDenseElement(slot) == (const Value *)this;

    42     return ok && owner->zone() == zone;

    43 }

    45 void

    46 HeapSlot::preconditionForWriteBarrierPost(JSObject *obj, Kind kind, uint32_t slot, Value target)

    47 {

    48     JS_ASSERT_IF(kind == Slot, obj->getSlotAddressUnchecked(slot)->get() == target);

    49     JS_ASSERT_IF(kind == Element,

    50                  static_cast<HeapSlot *>(obj->getDenseElements() + slot)->get() == target);

    51 }

    53 bool

    54 RuntimeFromMainThreadIsHeapMajorCollecting(JS::shadow::Zone *shadowZone)

    55 {

    56     return shadowZone->runtimeFromMainThread()->isHeapMajorCollecting();

    57 }

    58 #endif // DEBUG

    60 bool

    61 StringIsPermanentAtom(JSString *str)

    62 {

    63     return str->isPermanentAtom();

    64 }

    66 } // namespace js

The Tor Browser / file revision

js/src/gc/Barrier.cpp@129ffea94266

js/src/gc/Barrier.cpp