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https://github.com/LadybirdBrowser/ladybird
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4ea4d63008
On macOS, use Mach port messaging instead of Unix domain sockets for all IPC transport. This makes the transport capable of carrying Mach port rights as message attachments, which is a prerequisite for sending IOSurface handles over the main IPC channel (currently sent via a separate out-of-band path). It also avoids the need for the FD acknowledgement protocol that TransportSocket requires, since Mach port right transfers are atomic in the kernel. Three connection establishment patterns: - Spawned helper processes (WebContent, RequestServer, etc.) use the existing MachPortServer: the child sends its task port with a reply port, and the parent responds with a pre-created port pair. - Socket-bootstrapped connections (WebDriver, BrowserProcess) exchange Mach port names over the socket, then drop the socket. - Pre-created pairs for IPC tests and in-message transport transfer. Attachment on macOS now wraps a MachPort instead of a file descriptor, converting between the two via fileport_makeport()/fileport_makefd(). The LibIPC socket transport tests are disabled on macOS since they are socket-specific.
91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
/*
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* Copyright (c) 2024, Andrew Kaster <akaster@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Platform.h>
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#ifndef AK_OS_MACH
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# error "MachPort is only available on Mach platforms"
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#endif
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#include <AK/Error.h>
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#include <AK/Noncopyable.h>
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#include <LibCore/Export.h>
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#if defined(AK_OS_MACOS) || defined(AK_OS_IOS)
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# include <mach/mach.h>
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#else
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extern "C" {
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# include <mach/mach.h>
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}
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#endif
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namespace Core {
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// https://www.gnu.org/software/hurd/gnumach-doc/Major-Concepts.html#Major-Concepts
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class CORE_API MachPort {
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AK_MAKE_NONCOPYABLE(MachPort);
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public:
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// https://www.gnu.org/software/hurd/gnumach-doc/Exchanging-Port-Rights.html#Exchanging-Port-Rights
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enum class PortRight : mach_port_right_t {
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Send = MACH_PORT_RIGHT_SEND,
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Receive = MACH_PORT_RIGHT_RECEIVE,
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SendOnce = MACH_PORT_RIGHT_SEND_ONCE,
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PortSet = MACH_PORT_RIGHT_PORT_SET,
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DeadName = MACH_PORT_RIGHT_DEAD_NAME,
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};
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enum class MessageRight : mach_msg_type_name_t {
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MoveReceive = MACH_MSG_TYPE_MOVE_RECEIVE,
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MoveSend = MACH_MSG_TYPE_MOVE_SEND,
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MoveSendOnce = MACH_MSG_TYPE_MOVE_SEND_ONCE,
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CopySend = MACH_MSG_TYPE_COPY_SEND,
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MakeSend = MACH_MSG_TYPE_MAKE_SEND,
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MakeSendOnce = MACH_MSG_TYPE_MAKE_SEND_ONCE,
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#if defined(AK_OS_MACOS)
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CopyReceive = MACH_MSG_TYPE_COPY_RECEIVE,
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DisposeReceive = MACH_MSG_TYPE_DISPOSE_RECEIVE,
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DisposeSend = MACH_MSG_TYPE_DISPOSE_SEND,
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DisposeSendOnce = MACH_MSG_TYPE_DISPOSE_SEND_ONCE,
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#endif
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};
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MachPort() = default;
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MachPort(MachPort&& other);
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MachPort& operator=(MachPort&& other);
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~MachPort();
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mach_port_t release();
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static ErrorOr<MachPort> create_with_right(PortRight);
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static MachPort adopt_right(mach_port_t, PortRight);
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ErrorOr<MachPort> insert_right(MessageRight);
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#if defined(AK_OS_MACOS)
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// https://opensource.apple.com/source/launchd/launchd-842.92.1/liblaunch/bootstrap.h.auto.html
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static ErrorOr<MachPort> look_up_from_bootstrap_server(ByteString const& service_name);
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ErrorOr<void> register_with_bootstrap_server(ByteString const& service_name);
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#endif
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// FIXME: mach_msg wrapper? For now just let the owner poke into the internals
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mach_port_t port() const { return m_port; }
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private:
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MachPort(PortRight, mach_port_t);
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void unref_port();
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PortRight m_right { PortRight::DeadName };
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mach_port_t m_port { MACH_PORT_NULL };
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};
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CORE_API Error mach_error_to_error(kern_return_t error);
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}
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