1 //===-- HostProcessPosix.cpp ------------------------------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "lldb/Host/Host.h"
11 #include "lldb/Host/FileSystem.h"
12 #include "lldb/Host/posix/HostProcessPosix.h"
13
14 #include "llvm/ADT/STLExtras.h"
15
16 #include <csignal>
17 #include <limits.h>
18 #include <unistd.h>
19
20 using namespace lldb_private;
21
22 namespace {
23 const int kInvalidPosixProcess = 0;
24 }
25
HostProcessPosix()26 HostProcessPosix::HostProcessPosix()
27 : HostNativeProcessBase(kInvalidPosixProcess) {}
28
HostProcessPosix(lldb::process_t process)29 HostProcessPosix::HostProcessPosix(lldb::process_t process)
30 : HostNativeProcessBase(process) {}
31
~HostProcessPosix()32 HostProcessPosix::~HostProcessPosix() {}
33
Signal(int signo) const34 Status HostProcessPosix::Signal(int signo) const {
35 if (m_process == kInvalidPosixProcess) {
36 Status error;
37 error.SetErrorString("HostProcessPosix refers to an invalid process");
38 return error;
39 }
40
41 return HostProcessPosix::Signal(m_process, signo);
42 }
43
Signal(lldb::process_t process,int signo)44 Status HostProcessPosix::Signal(lldb::process_t process, int signo) {
45 Status error;
46
47 if (-1 == ::kill(process, signo))
48 error.SetErrorToErrno();
49
50 return error;
51 }
52
Terminate()53 Status HostProcessPosix::Terminate() { return Signal(SIGKILL); }
54
GetMainModule(FileSpec & file_spec) const55 Status HostProcessPosix::GetMainModule(FileSpec &file_spec) const {
56 Status error;
57
58 // Use special code here because proc/[pid]/exe is a symbolic link.
59 char link_path[PATH_MAX];
60 if (snprintf(link_path, PATH_MAX, "/proc/%" PRIu64 "/exe", m_process) != 1) {
61 error.SetErrorString("Unable to build /proc/<pid>/exe string");
62 return error;
63 }
64
65 error = FileSystem::Instance().Readlink(FileSpec(link_path), file_spec);
66 if (!error.Success())
67 return error;
68
69 // If the binary has been deleted, the link name has " (deleted)" appended.
70 // Remove if there.
71 if (file_spec.GetFilename().GetStringRef().endswith(" (deleted)")) {
72 const char *filename = file_spec.GetFilename().GetCString();
73 static const size_t deleted_len = strlen(" (deleted)");
74 const size_t len = file_spec.GetFilename().GetLength();
75 file_spec.GetFilename().SetCStringWithLength(filename, len - deleted_len);
76 }
77 return error;
78 }
79
GetProcessId() const80 lldb::pid_t HostProcessPosix::GetProcessId() const { return m_process; }
81
IsRunning() const82 bool HostProcessPosix::IsRunning() const {
83 if (m_process == kInvalidPosixProcess)
84 return false;
85
86 // Send this process the null signal. If it succeeds the process is running.
87 Status error = Signal(0);
88 return error.Success();
89 }
90
StartMonitoring(const Host::MonitorChildProcessCallback & callback,bool monitor_signals)91 HostThread HostProcessPosix::StartMonitoring(
92 const Host::MonitorChildProcessCallback &callback, bool monitor_signals) {
93 return Host::StartMonitoringChildProcess(callback, m_process,
94 monitor_signals);
95 }
96