mirrors/ladybird
0
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-09-02 23:56:06 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 10

Ladybird/AppKit: Retrieve socket notifiers from the local thread data

Browse source 
For some reason, we occasionally receive a junk `info` pointer from the
CFSocketCallback we create for socket notifiers. Instead of capturing a
pointer to the local Core::Notifier for this `info` member, grab it from
the thread data instance based on the socket FD.

This was mostly seen when spamming new window requests to an existing
Ladybird process.
This commit is contained in:
Timothy Flynn 2024-04-28 12:15:40 -04:00 • committed by Andrew Kaster
commit 606df46e46
Notes: sideshowbarker 2024-07-18 05:01:22 +09:00
1 changed files with 14 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

17
Ladybird/AppKit/Application/EventLoopImplementation.mm
View file

@ -23,6 +23,17 @@ struct ThreadData {
return s_thread_data;
}
Core::Notifier& notifier_by_fd(int fd)
{
for (auto notifier : notifiers) {
if (notifier.key->fd() == fd)
return *notifier.key;
}
// If we didn't have a notifier for the provided FD, it should have been unregistered.
VERIFY_NOT_REACHED();
}
IDAllocator timer_id_allocator;
HashMap<int, CFRunLoopTimerRef> timers;
HashMap<Core::Notifier*, CFRunLoopSourceRef> notifiers;
@ -93,9 +104,9 @@ void CFEventLoopManager::unregister_timer(intptr_t timer_id)
CFRelease(*timer);
}
static void socket_notifier(CFSocketRef socket, CFSocketCallBackType notification_type, CFDataRef, void const*, void* info)
static void socket_notifier(CFSocketRef socket, CFSocketCallBackType notification_type, CFDataRef, void const*, void*)
{
auto& notifier = *reinterpret_cast<Core::Notifier*>(info);
auto& notifier = ThreadData::the().notifier_by_fd(CFSocketGetNative(socket));
// This socket callback is not quite re-entrant. If Core::Notifier::dispatch_event blocks, e.g.
// to wait upon a Core::Promise, this socket will not receive any more notifications until that
@ -127,7 +138,7 @@ void CFEventLoopManager::register_notifier(Core::Notifier& notifier)
break;
}
CFSocketContext context { .version = 0, .info = &notifier, .retain = nullptr, .release = nullptr, .copyDescription = nullptr };
CFSocketContext context { .version = 0, .info = nullptr, .retain = nullptr, .release = nullptr, .copyDescription = nullptr };
auto* socket = CFSocketCreateWithNative(kCFAllocatorDefault, notifier.fd(), notification_type, &socket_notifier, &context);
CFOptionFlags sockopt = CFSocketGetSocketFlags(socket);