1 //===-- MonitoringProcessLauncher.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/MonitoringProcessLauncher.h"
11 #include "lldb/Host/HostProcess.h"
12 #include "lldb/Target/ProcessLaunchInfo.h"
13 #include "lldb/Utility/Log.h"
14 #include "lldb/Utility/Status.h"
15 
16 #include "llvm/Support/FileSystem.h"
17 
18 using namespace lldb;
19 using namespace lldb_private;
20 
21 MonitoringProcessLauncher::MonitoringProcessLauncher(
22     std::unique_ptr<ProcessLauncher> delegate_launcher)
23     : m_delegate_launcher(std::move(delegate_launcher)) {}
24 
25 HostProcess
26 MonitoringProcessLauncher::LaunchProcess(const ProcessLaunchInfo &launch_info,
27                                          Status &error) {
28   ProcessLaunchInfo resolved_info(launch_info);
29 
30   error.Clear();
31 
32   FileSpec exe_spec(resolved_info.GetExecutableFile());
33 
34   llvm::sys::fs::file_status stats;
35   status(exe_spec.GetPath(), stats);
36   if (!exists(stats)) {
37     exe_spec.ResolvePath();
38     status(exe_spec.GetPath(), stats);
39   }
40   if (!exists(stats)) {
41     exe_spec.ResolveExecutableLocation();
42     status(exe_spec.GetPath(), stats);
43   }
44 
45   if (!exists(stats)) {
46     error.SetErrorStringWithFormatv("executable doesn't exist: '{0}'",
47                                     exe_spec);
48     return HostProcess();
49   }
50 
51   resolved_info.SetExecutableFile(exe_spec, false);
52   assert(!resolved_info.GetFlags().Test(eLaunchFlagLaunchInTTY));
53 
54   HostProcess process =
55       m_delegate_launcher->LaunchProcess(resolved_info, error);
56 
57   if (process.GetProcessId() != LLDB_INVALID_PROCESS_ID) {
58     Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
59 
60     assert(launch_info.GetMonitorProcessCallback());
61     process.StartMonitoring(launch_info.GetMonitorProcessCallback(),
62                             launch_info.GetMonitorSignals());
63     if (log)
64       log->PutCString("started monitoring child process.");
65   } else {
66     // Invalid process ID, something didn't go well
67     if (error.Success())
68       error.SetErrorString("process launch failed for unknown reasons");
69   }
70   return process;
71 }
72