BrowsingContext::~BrowsingContext() {
MOZ_DIAGNOSTIC_ASSERT(!mParent || !mParent->mChildren.Contains(this));
MOZ_DIAGNOSTIC_ASSERT(!mGroup || !mGroup->Toplevels().Contains(this));
MOZ_DIAGNOSTIC_ASSERT(!sCachedBrowsingContexts ||
!sCachedBrowsingContexts->has(Id()));
if (sBrowsingContexts) {
sBrowsingContexts->remove(Id());
}
}
void BrowsingContext::Detach(bool aFromIPC) {
MOZ_LOG(GetLog(), LogLevel::Debug,
("%s: Detaching 0x%08" PRIx64 " from 0x%08" PRIx64,
XRE_IsParentProcess() ? "Parent" : "Child", Id(),
mParent ? mParent->Id() : 0));
RefPtr<BrowsingContext> kungFuDeathGrip(this);
BrowsingContextMap<RefPtr>::Ptr p;
if (sCachedBrowsingContexts && (p = sCachedBrowsingContexts->lookup(Id()))) {
MOZ_DIAGNOSTIC_ASSERT(!mParent || !mParent->mChildren.Contains(this));
MOZ_DIAGNOSTIC_ASSERT(!mGroup || !mGroup->Toplevels().Contains(this));
sCachedBrowsingContexts->remove(p);
} else {
Children* children = nullptr;
if (mParent) {
children = &mParent->mChildren;
} else if (mGroup) {
children = &mGroup->Toplevels();
}
if (children) {
// TODO(farre): This assert looks extremely fishy, I know, but
// what we're actually saying is this: if we're detaching, but our
// parent doesn't have any children, it is because we're being
// detached by the cycle collector destroying docshells out of
// order.
MOZ_DIAGNOSTIC_ASSERT(children->IsEmpty() || children->Contains(this));
children->RemoveElement(this);
}
}
if (mGroup) {
mGroup->Unregister(this);
}
// As our nsDocShell is going away, this should implicitly mark us as closed.
// We directly set our member, rather than using a transaction as we're going
// to send a `Detach` message to other processes either way.
mClosed = true;
if (!aFromIPC && XRE_IsContentProcess()) {
auto cc = ContentChild::GetSingleton();
MOZ_DIAGNOSTIC_ASSERT(cc);
cc->SendDetachBrowsingContext(this, false /* aMoveToBFCache */);
}
}
void BrowsingContext::Attach(bool aFromIPC) {
MOZ_LOG(GetLog(), LogLevel::Debug,
("%s: %s 0x%08" PRIx64 " to 0x%08" PRIx64,
XRE_IsParentProcess() ? "Parent" : "Child",
sCachedBrowsingContexts->has(Id()) ? "Re-connecting" : "Connecting",
Id(), mParent ? mParent->Id() : 0));
sCachedBrowsingContexts->remove(Id());
auto* children = mParent ? &mParent->mChildren : &mGroup->Toplevels();
MOZ_DIAGNOSTIC_ASSERT(!children->Contains(this));
children->AppendElement(this);
// Send attach to our parent if we need to.
if (!aFromIPC && XRE_IsContentProcess()) {
ContentChild::GetSingleton()->SendAttachBrowsingContext(
GetIPCInitializer());
}
}
