1 //===-- HostProcessPosix.cpp ----------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "lldb/Host/Host.h"
10 #include "lldb/Host/FileSystem.h"
11 #include "lldb/Host/posix/HostProcessPosix.h"
12 
13 #include "llvm/ADT/STLExtras.h"
14 
15 #include <climits>
16 #include <csignal>
17 #include <unistd.h>
18 
19 using namespace lldb_private;
20 
21 static const int kInvalidPosixProcess = 0;
22 
23 HostProcessPosix::HostProcessPosix()
24     : HostNativeProcessBase(kInvalidPosixProcess) {}
25 
26 HostProcessPosix::HostProcessPosix(lldb::process_t process)
27     : HostNativeProcessBase(process) {}
28 
29 HostProcessPosix::~HostProcessPosix() = default;
30 
31 Status HostProcessPosix::Signal(int signo) const {
32   if (m_process == kInvalidPosixProcess) {
33     Status error;
34     error.SetErrorString("HostProcessPosix refers to an invalid process");
35     return error;
36   }
37 
38   return HostProcessPosix::Signal(m_process, signo);
39 }
40 
41 Status HostProcessPosix::Signal(lldb::process_t process, int signo) {
42   Status error;
43 
44   if (-1 == ::kill(process, signo))
45     error.SetErrorToErrno();
46 
47   return error;
48 }
49 
50 Status HostProcessPosix::Terminate() { return Signal(SIGKILL); }
51 
52 lldb::pid_t HostProcessPosix::GetProcessId() const { return m_process; }
53 
54 bool HostProcessPosix::IsRunning() const {
55   if (m_process == kInvalidPosixProcess)
56     return false;
57 
58   // Send this process the null signal.  If it succeeds the process is running.
59   Status error = Signal(0);
60   return error.Success();
61 }
62 
63 llvm::Expected<HostThread> HostProcessPosix::StartMonitoring(
64     const Host::MonitorChildProcessCallback &callback) {
65   return Host::StartMonitoringChildProcess(callback, m_process);
66 }
67