Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 93 insertions, 0 deletions

diff --git a/ipc/chromium/src/chrome/common/mach_ipc_mac.cc b/ipc/chromium/src/chrome/common/mach_ipc_mac.cc
new file mode 100644
index 0000000000..2fa1a47fd3
--- /dev/null
+++ b/ipc/chromium/src/chrome/common/mach_ipc_mac.cc
@@ -0,0 +1,93 @@
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/common/mach_ipc_mac.h"
+
+#include "base/logging.h"
+#include "mozilla/UniquePtrExtensions.h"
+#include "nsDebug.h"
+
+namespace {
+// Struct for sending a Mach message with a single port.
+struct MachSinglePortMessage {
+  mach_msg_header_t header;
+  mach_msg_body_t body;
+  mach_msg_port_descriptor_t data;
+};
+
+// Struct for receiving a Mach message with a single port.
+struct MachSinglePortMessageTrailer : MachSinglePortMessage {
+  mach_msg_audit_trailer_t trailer;
+};
+}  // namespace
+
+//==============================================================================
+kern_return_t MachSendPortSendRight(
+    mach_port_t endpoint, mach_port_t attachment,
+    mozilla::Maybe<mach_msg_timeout_t> opt_timeout,
+    mach_msg_type_name_t endpoint_disposition) {
+  mach_msg_option_t opts = MACH_SEND_MSG;
+  mach_msg_timeout_t timeout = MACH_MSG_TIMEOUT_NONE;
+  if (opt_timeout) {
+    opts |= MACH_SEND_TIMEOUT;
+    timeout = *opt_timeout;
+  }
+
+  MachSinglePortMessage send_msg{};
+  send_msg.header.msgh_bits =
+      MACH_MSGH_BITS(endpoint_disposition, 0) | MACH_MSGH_BITS_COMPLEX;
+  send_msg.header.msgh_size = sizeof(send_msg);
+  send_msg.header.msgh_remote_port = endpoint;
+  send_msg.header.msgh_local_port = MACH_PORT_NULL;
+  send_msg.header.msgh_reserved = 0;
+  send_msg.header.msgh_id = 0;
+  send_msg.body.msgh_descriptor_count = 1;
+  send_msg.data.name = attachment;
+  send_msg.data.disposition = MACH_MSG_TYPE_COPY_SEND;
+  send_msg.data.type = MACH_MSG_PORT_DESCRIPTOR;
+
+  return mach_msg(&send_msg.header, opts, send_msg.header.msgh_size, 0,
+                  MACH_PORT_NULL, timeout, MACH_PORT_NULL);
+}
+
+//==============================================================================
+kern_return_t MachReceivePortSendRight(
+    const mozilla::UniqueMachReceiveRight& endpoint,
+    mozilla::Maybe<mach_msg_timeout_t> opt_timeout,
+    mozilla::UniqueMachSendRight* attachment, audit_token_t* audit_token) {
+  mach_msg_option_t opts = MACH_RCV_MSG |
+                           MACH_RCV_TRAILER_TYPE(MACH_MSG_TRAILER_FORMAT_0) |
+                           MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_AUDIT);
+  mach_msg_timeout_t timeout = MACH_MSG_TIMEOUT_NONE;
+  if (opt_timeout) {
+    opts |= MACH_RCV_TIMEOUT;
+    timeout = *opt_timeout;
+  }
+
+  MachSinglePortMessageTrailer recv_msg{};
+  recv_msg.header.msgh_local_port = endpoint.get();
+  recv_msg.header.msgh_size = sizeof(recv_msg);
+
+  kern_return_t kr =
+      mach_msg(&recv_msg.header, opts, 0, recv_msg.header.msgh_size,
+               endpoint.get(), timeout, MACH_PORT_NULL);
+  if (kr != KERN_SUCCESS) {
+    return kr;
+  }
+
+  if (NS_WARN_IF(!(recv_msg.header.msgh_bits & MACH_MSGH_BITS_COMPLEX)) ||
+      NS_WARN_IF(recv_msg.body.msgh_descriptor_count != 1) ||
+      NS_WARN_IF(recv_msg.data.type != MACH_MSG_PORT_DESCRIPTOR) ||
+      NS_WARN_IF(recv_msg.data.disposition != MACH_MSG_TYPE_MOVE_SEND) ||
+      NS_WARN_IF(recv_msg.header.msgh_size != sizeof(MachSinglePortMessage))) {
+    mach_msg_destroy(&recv_msg.header);
+    return KERN_FAILURE;  // Invalid message format
+  }
+
+  attachment->reset(recv_msg.data.name);
+  if (audit_token) {
+    *audit_token = recv_msg.trailer.msgh_audit;
+  }
+  return KERN_SUCCESS;
+}