1//===-- MonitoringProcessLauncher.cpp ---------------------------*- C++ -*-===// 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/MonitoringProcessLauncher.h" 10#include "lldb/Host/FileSystem.h" 11#include "lldb/Host/HostProcess.h" 12#include "lldb/Host/ProcessLaunchInfo.h" 13#include "lldb/Utility/Log.h" 14 15#include "llvm/Support/FileSystem.h" 16 17using namespace lldb; 18using namespace lldb_private; 19 20MonitoringProcessLauncher::MonitoringProcessLauncher( 21 std::unique_ptr<ProcessLauncher> delegate_launcher) 22 : m_delegate_launcher(std::move(delegate_launcher)) {} 23 24HostProcess 25MonitoringProcessLauncher::LaunchProcess(const ProcessLaunchInfo &launch_info, 26 Status &error) { 27 ProcessLaunchInfo resolved_info(launch_info); 28 29 error.Clear(); 30 31 FileSystem &fs = FileSystem::Instance(); 32 FileSpec exe_spec(resolved_info.GetExecutableFile()); 33 34 if (!fs.Exists(exe_spec)) 35 FileSystem::Instance().Resolve(exe_spec); 36 37 if (!fs.Exists(exe_spec)) 38 FileSystem::Instance().ResolveExecutableLocation(exe_spec); 39 40 if (!fs.Exists(exe_spec)) { 41 error.SetErrorStringWithFormatv("executable doesn't exist: '{0}'", 42 exe_spec); 43 return HostProcess(); 44 } 45 46 resolved_info.SetExecutableFile(exe_spec, false); 47 assert(!resolved_info.GetFlags().Test(eLaunchFlagLaunchInTTY)); 48 49 HostProcess process = 50 m_delegate_launcher->LaunchProcess(resolved_info, error); 51 52 if (process.GetProcessId() != LLDB_INVALID_PROCESS_ID) { 53 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); 54 55 assert(launch_info.GetMonitorProcessCallback()); 56 llvm::Expected<HostThread> maybe_thread = 57 process.StartMonitoring(launch_info.GetMonitorProcessCallback(), 58 launch_info.GetMonitorSignals()); 59 if (!maybe_thread) 60 error.SetErrorStringWithFormatv("failed to launch host thread: {}", 61 llvm::toString(maybe_thread.takeError())); 62 if (log) 63 log->PutCString("started monitoring child process."); 64 } else { 65 // Invalid process ID, something didn't go well 66 if (error.Success()) 67 error.SetErrorString("process launch failed for unknown reasons"); 68 } 69 return process; 70} 71