Adding upstream version 86.0.1.upstream/86.0.1upstream

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

1 files changed, 174 insertions, 0 deletions

diff --git a/ipc/chromium/src/chrome/common/ipc_channel_posix.h b/ipc/chromium/src/chrome/common/ipc_channel_posix.h
new file mode 100644
index 0000000000..c48121f776
--- /dev/null
+++ b/ipc/chromium/src/chrome/common/ipc_channel_posix.h
@@ -0,0 +1,174 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 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.
+
+#ifndef CHROME_COMMON_IPC_CHANNEL_POSIX_H_
+#define CHROME_COMMON_IPC_CHANNEL_POSIX_H_
+
+#include "chrome/common/ipc_channel.h"
+
+#include <sys/socket.h>  // for CMSG macros
+
+#include <string>
+#include <vector>
+#include <list>
+
+#include "base/message_loop.h"
+#include "base/task.h"
+#include "chrome/common/file_descriptor_set_posix.h"
+
+#include "mozilla/Maybe.h"
+#include "mozilla/Queue.h"
+#include "mozilla/UniquePtr.h"
+
+namespace IPC {
+
+// An implementation of ChannelImpl for POSIX systems that works via
+// socketpairs.  See the .cc file for an overview of the implementation.
+class Channel::ChannelImpl : public MessageLoopForIO::Watcher {
+ public:
+  using ChannelId = Channel::ChannelId;
+
+  // Mirror methods of Channel, see ipc_channel.h for description.
+  ChannelImpl(const ChannelId& channel_id, Mode mode, Listener* listener);
+  ChannelImpl(int fd, Mode mode, Listener* listener);
+  ~ChannelImpl() { Close(); }
+  bool Connect();
+  void Close();
+  Listener* set_listener(Listener* listener) {
+    Listener* old = listener_;
+    listener_ = listener;
+    return old;
+  }
+  bool Send(mozilla::UniquePtr<Message> message);
+  void GetClientFileDescriptorMapping(int* src_fd, int* dest_fd) const;
+
+  void ResetFileDescriptor(int fd);
+
+  int GetFileDescriptor() const { return pipe_; }
+  void CloseClientFileDescriptor();
+
+  // See the comment in ipc_channel.h for info on Unsound_IsClosed() and
+  // Unsound_NumQueuedMessages().
+  bool Unsound_IsClosed() const;
+  uint32_t Unsound_NumQueuedMessages() const;
+
+ private:
+  void Init(Mode mode, Listener* listener);
+  bool CreatePipe(Mode mode);
+  bool EnqueueHelloMessage();
+
+  bool ProcessIncomingMessages();
+  bool ProcessOutgoingMessages();
+
+  // MessageLoopForIO::Watcher implementation.
+  virtual void OnFileCanReadWithoutBlocking(int fd) override;
+  virtual void OnFileCanWriteWithoutBlocking(int fd) override;
+
+#if defined(OS_MACOSX)
+  void CloseDescriptors(uint32_t pending_fd_id);
+#endif
+
+  void OutputQueuePush(mozilla::UniquePtr<Message> msg);
+  void OutputQueuePop();
+
+  Mode mode_;
+
+  // After accepting one client connection on our server socket we want to
+  // stop listening.
+  MessageLoopForIO::FileDescriptorWatcher server_listen_connection_watcher_;
+  MessageLoopForIO::FileDescriptorWatcher read_watcher_;
+  MessageLoopForIO::FileDescriptorWatcher write_watcher_;
+
+  // Indicates whether we're currently blocked waiting for a write to complete.
+  bool is_blocked_on_write_;
+
+  // If sending a message blocks then we use this iterator to keep track of
+  // where in the message we are. It gets reset when the message is finished
+  // sending.
+  mozilla::Maybe<Pickle::BufferList::IterImpl> partial_write_iter_;
+
+  int server_listen_pipe_;
+  int pipe_;
+  int client_pipe_;  // The client end of our socketpair().
+
+  Listener* listener_;
+
+  // Messages to be sent are queued here.
+  mozilla::Queue<mozilla::UniquePtr<Message>, 64> output_queue_;
+
+  // We read from the pipe into these buffers.
+  size_t input_buf_offset_;
+  mozilla::UniquePtr<char[]> input_buf_;
+  mozilla::UniquePtr<char[]> input_cmsg_buf_;
+
+  // The control message buffer will hold all of the file descriptors that will
+  // be read in during a single recvmsg call. Message::WriteFileDescriptor
+  // always writes one word of data for every file descriptor added to the
+  // message, and the number of file descriptors per message will not exceed
+  // MAX_DESCRIPTORS_PER_MESSAGE.
+  //
+  // This buffer also holds a control message header of size CMSG_SPACE(0)
+  // bytes. However, CMSG_SPACE is not a constant on Macs, so we can't use it
+  // here. Consequently, we pick a number here that is at least CMSG_SPACE(0) on
+  // all platforms. We assert at runtime, in Channel::ChannelImpl::Init, that
+  // it's big enough.
+  static constexpr size_t kControlBufferHeaderSize = 32;
+  static constexpr size_t kControlBufferSize =
+      FileDescriptorSet::MAX_DESCRIPTORS_PER_MESSAGE * sizeof(int) +
+      kControlBufferHeaderSize;
+
+  // Large incoming messages that span multiple pipe buffers get built-up in the
+  // buffers of this message.
+  mozilla::Maybe<Message> incoming_message_;
+  std::vector<int> input_overflow_fds_;
+
+  // In server-mode, we have to wait for the client to connect before we
+  // can begin reading.  We make use of the input_state_ when performing
+  // the connect operation in overlapped mode.
+  bool waiting_connect_;
+
+  // This flag is set when processing incoming messages.  It is used to
+  // avoid recursing through ProcessIncomingMessages, which could cause
+  // problems.  TODO(darin): make this unnecessary
+  bool processing_incoming_;
+
+  // This flag is set after we've closed the channel.
+  bool closed_;
+
+  // We keep track of the PID of the other side of this channel so that we can
+  // record this when generating logs of IPC messages.
+  int32_t other_pid_ = -1;
+
+#if defined(OS_MACOSX)
+  struct PendingDescriptors {
+    uint32_t id;
+    RefPtr<FileDescriptorSet> fds;
+
+    PendingDescriptors() : id(0) {}
+    PendingDescriptors(uint32_t id, FileDescriptorSet* fds)
+        : id(id), fds(fds) {}
+  };
+
+  std::list<PendingDescriptors> pending_fds_;
+
+  // A generation ID for RECEIVED_FD messages.
+  uint32_t last_pending_fd_id_;
+#endif
+
+  // This variable is updated so it matches output_queue_.Count(), except we can
+  // read output_queue_length_ from any thread (if we're OK getting an
+  // occasional out-of-date or bogus value).  We use output_queue_length_ to
+  // implement Unsound_NumQueuedMessages.
+  size_t output_queue_length_;
+
+  ScopedRunnableMethodFactory<ChannelImpl> factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChannelImpl);
+};
+
+}  // namespace IPC
+
+#endif  // CHROME_COMMON_IPC_CHANNEL_POSIX_H_