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1 //===-- MonitoringProcessLauncher.cpp -------------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "lldb/Host/MonitoringProcessLauncher.h"
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10 #include "lldb/Host/FileSystem.h"
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11 #include "lldb/Host/HostProcess.h"
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12 #include "lldb/Host/ProcessLaunchInfo.h"
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13 #include "lldb/Utility/Log.h"
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14
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15 #include "llvm/Support/FileSystem.h"
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16
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17 using namespace lldb;
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18 using namespace lldb_private;
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19
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20 MonitoringProcessLauncher::MonitoringProcessLauncher(
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21 std::unique_ptr<ProcessLauncher> delegate_launcher)
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22 : m_delegate_launcher(std::move(delegate_launcher)) {}
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23
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24 HostProcess
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25 MonitoringProcessLauncher::LaunchProcess(const ProcessLaunchInfo &launch_info,
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26 Status &error) {
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27 ProcessLaunchInfo resolved_info(launch_info);
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28
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29 error.Clear();
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30
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31 FileSystem &fs = FileSystem::Instance();
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32 FileSpec exe_spec(resolved_info.GetExecutableFile());
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33
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34 if (!fs.Exists(exe_spec))
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35 FileSystem::Instance().Resolve(exe_spec);
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36
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37 if (!fs.Exists(exe_spec))
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38 FileSystem::Instance().ResolveExecutableLocation(exe_spec);
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39
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40 if (!fs.Exists(exe_spec)) {
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41 error.SetErrorStringWithFormatv("executable doesn't exist: '{0}'",
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42 exe_spec);
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43 return HostProcess();
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44 }
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45
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46 resolved_info.SetExecutableFile(exe_spec, false);
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47 assert(!resolved_info.GetFlags().Test(eLaunchFlagLaunchInTTY));
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48
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49 HostProcess process =
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50 m_delegate_launcher->LaunchProcess(resolved_info, error);
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51
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52 if (process.GetProcessId() != LLDB_INVALID_PROCESS_ID) {
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53 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
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54
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55 assert(launch_info.GetMonitorProcessCallback());
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56 llvm::Expected<HostThread> maybe_thread =
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57 process.StartMonitoring(launch_info.GetMonitorProcessCallback(),
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58 launch_info.GetMonitorSignals());
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59 if (!maybe_thread)
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60 error.SetErrorStringWithFormatv("failed to launch host thread: {}",
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61 llvm::toString(maybe_thread.takeError()));
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62 if (log)
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63 log->PutCString("started monitoring child process.");
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64 } else {
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65 // Invalid process ID, something didn't go well
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66 if (error.Success())
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67 error.SetErrorString("process launch failed for unknown reasons");
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68 }
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69 return process;
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70 }
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