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📄 Config.h.cmake(1.2 KB)
📄 ConnectionFileDescriptor.h(528 B)
📄 Debug.h(4.44 KB)
📄 Editline.h(12.4 KB)
📄 File.h(15.26 KB)
📄 FileAction.h(1.35 KB)
📄 FileCache.h(1.29 KB)
📄 FileSystem.h(6.84 KB)
📄 Host.h(10.04 KB)
📄 HostGetOpt.h(699 B)
📄 HostInfo.h(2.6 KB)
📄 HostInfoBase.h(4.05 KB)
📄 HostNativeProcess.h(728 B)
📄 HostNativeProcessBase.h(1.43 KB)
📄 HostNativeThread.h(690 B)
📄 HostNativeThreadBase.h(1.46 KB)
📄 HostNativeThreadForward.h(753 B)
📄 HostProcess.h(1.7 KB)
📄 HostThread.h(1.32 KB)
📄 LZMA.h(883 B)
📄 LockFile.h(704 B)
📄 LockFileBase.h(1.52 KB)
📄 MainLoop.h(3.83 KB)
📄 MainLoopBase.h(2.91 KB)
📄 MonitoringProcessLauncher.h(1.12 KB)
📄 OptionParser.h(1.51 KB)
📄 Pipe.h(668 B)
📄 PipeBase.h(2.26 KB)
📄 PosixApi.h(743 B)
📄 ProcessLaunchInfo.h(5.36 KB)
📄 ProcessLauncher.h(735 B)
📄 ProcessRunLock.h(2.02 KB)
📄 PseudoTerminal.h(8.45 KB)
📄 SafeMachO.h(3.25 KB)
📄 Socket.h(4.56 KB)
📄 SocketAddress.h(5.77 KB)
📄 StringConvert.h(1.26 KB)
📄 Terminal.h(5.12 KB)
📄 ThreadLauncher.h(1.39 KB)
📄 Time.h(718 B)
📄 XML.h(4.7 KB)
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Editing: MainLoop.h

//===-- MainLoop.h ----------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLDB_HOST_MAINLOOP_H
#define LLDB_HOST_MAINLOOP_H

#include "lldb/Host/Config.h"
#include "lldb/Host/MainLoopBase.h"
#include "llvm/ADT/DenseMap.h"
#include <csignal>

#if !HAVE_PPOLL && !HAVE_SYS_EVENT_H && !defined(__ANDROID__)
#define SIGNAL_POLLING_UNSUPPORTED 1
#endif

namespace lldb_private {

// Implementation of the MainLoopBase class. It can monitor file descriptors
// for readability using ppoll, kqueue, poll or WSAPoll. On Windows it only
// supports polling sockets, and will not work on generic file handles or
// pipes. On systems without kqueue or ppoll handling singnals is not
// supported. In addition to the common base, this class provides the ability
// to invoke a given handler when a signal is received.
//
// Since this class is primarily intended to be used for single-threaded
// processing, it does not attempt to perform any internal synchronisation and
// any concurrent accesses must be protected  externally. However, it is
// perfectly legitimate to have more than one instance of this class running on
// separate threads, or even a single thread (with some limitations on signal
// monitoring).
// TODO: Add locking if this class is to be used in a multi-threaded context.
class MainLoop : public MainLoopBase {
private:
  class SignalHandle;

public:
  typedef std::unique_ptr<SignalHandle> SignalHandleUP;

MainLoop();
  ~MainLoop() override;

ReadHandleUP RegisterReadObject(const lldb::IOObjectSP &object_sp,
                                  const Callback &callback,
                                  Status &error) override;

// Listening for signals from multiple MainLoop instances is perfectly safe
  // as long as they don't try to listen for the same signal. The callback
  // function is invoked when the control returns to the Run() function, not
  // when the hander is executed. This mean that you can treat the callback as
  // a normal function and perform things which would not be safe in a signal
  // handler. However, since the callback is not invoked synchronously, you
  // cannot use this mechanism to handle SIGSEGV and the like.
  SignalHandleUP RegisterSignal(int signo, const Callback &callback,
                                Status &error);

Status Run() override;

// This should only be performed from a callback. Do not attempt to terminate
  // the processing from another thread.
  // TODO: Add synchronization if we want to be terminated from another thread.
  void RequestTermination() override { m_terminate_request = true; }

protected:
  void UnregisterReadObject(IOObject::WaitableHandle handle) override;

void UnregisterSignal(int signo);

private:
  void ProcessReadObject(IOObject::WaitableHandle handle);
  void ProcessSignal(int signo);

class SignalHandle {
  public:
    ~SignalHandle() { m_mainloop.UnregisterSignal(m_signo); }

private:
    SignalHandle(MainLoop &mainloop, int signo)
        : m_mainloop(mainloop), m_signo(signo) {}

MainLoop &m_mainloop;
    int m_signo;

friend class MainLoop;
    SignalHandle(const SignalHandle &) = delete;
    const SignalHandle &operator=(const SignalHandle &) = delete;
  };

struct SignalInfo {
    Callback callback;
#if HAVE_SIGACTION
    struct sigaction old_action;
#endif
    bool was_blocked : 1;
  };
  class RunImpl;

llvm::DenseMap<IOObject::WaitableHandle, Callback> m_read_fds;
  llvm::DenseMap<int, SignalInfo> m_signals;
#if HAVE_SYS_EVENT_H
  int m_kqueue;
#endif
  bool m_terminate_request : 1;
};

} // namespace lldb_private

#endif // LLDB_HOST_MAINLOOP_H

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Editing: MainLoop.h

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