contrib/llvm/tools/lldb/source/Host/common/MonitoringProcessLauncher.cpp

   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/Core/Error.h"
  12 #include "lldb/Core/Log.h"
  13 #include "lldb/Core/Module.h"
  14 #include "lldb/Core/ModuleSpec.h"
  15 #include "lldb/Host/HostProcess.h"
  16 #include "lldb/Target/Platform.h"
  17 #include "lldb/Target/Process.h"
  18 #include "lldb/Target/ProcessLaunchInfo.h"
  19
  20 using namespace lldb;
  21 using namespace lldb_private;
  22
  23 MonitoringProcessLauncher::MonitoringProcessLauncher(
  24     std::unique_ptr<ProcessLauncher> delegate_launcher)
  25     : m_delegate_launcher(std::move(delegate_launcher)) {}
  26
  27 HostProcess
  28 MonitoringProcessLauncher::LaunchProcess(const ProcessLaunchInfo &launch_info,
  29                                          Error &error) {
  30   ProcessLaunchInfo resolved_info(launch_info);
  31
  32   error.Clear();
  33   char exe_path[PATH_MAX];
  34
  35   PlatformSP host_platform_sp(Platform::GetHostPlatform());
  36
  37   const ArchSpec &arch_spec = resolved_info.GetArchitecture();
  38
  39   FileSpec exe_spec(resolved_info.GetExecutableFile());
  40
  41   FileSpec::FileType file_type = exe_spec.GetFileType();
  42   if (file_type != FileSpec::eFileTypeRegular) {
  43     ModuleSpec module_spec(exe_spec, arch_spec);
  44     lldb::ModuleSP exe_module_sp;
  45     error =
  46         host_platform_sp->ResolveExecutable(module_spec, exe_module_sp, NULL);
  47
  48     if (error.Fail())
  49       return HostProcess();
  50
  51     if (exe_module_sp)
  52       exe_spec = exe_module_sp->GetFileSpec();
  53   }
  54
  55   if (exe_spec.Exists()) {
  56     exe_spec.GetPath(exe_path, sizeof(exe_path));
  57   } else {
  58     resolved_info.GetExecutableFile().GetPath(exe_path, sizeof(exe_path));
  59     error.SetErrorStringWithFormat("executable doesn't exist: '%s'", exe_path);
  60     return HostProcess();
  61   }
  62
  63   resolved_info.SetExecutableFile(exe_spec, false);
  64   assert(!resolved_info.GetFlags().Test(eLaunchFlagLaunchInTTY));
  65
  66   HostProcess process =
  67       m_delegate_launcher->LaunchProcess(resolved_info, error);
  68
  69   if (process.GetProcessId() != LLDB_INVALID_PROCESS_ID) {
  70     Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
  71
  72     Host::MonitorChildProcessCallback callback =
  73         launch_info.GetMonitorProcessCallback();
  74
  75     bool monitor_signals = false;
  76     if (callback) {
  77       // If the ProcessLaunchInfo specified a callback, use that.
  78       monitor_signals = launch_info.GetMonitorSignals();
  79     } else {
  80       callback = Process::SetProcessExitStatus;
  81     }
  82
  83     process.StartMonitoring(callback, monitor_signals);
  84     if (log)
  85       log->PutCString("started monitoring child process.");
  86   } else {
  87     // Invalid process ID, something didn't go well
  88     if (error.Success())
  89       error.SetErrorString("process launch failed for unknown reasons");
  90   }
  91   return process;
  92 }