| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/path_service.h" |
| #include "base/posix/global_descriptors.h" |
| #include "content/browser/child_process_launcher.h" |
| #include "content/browser/child_process_launcher_helper.h" |
| #include "content/browser/child_process_launcher_helper_posix.h" |
| #include "content/browser/renderer_host/render_sandbox_host_linux.h" |
| #include "content/browser/zygote_host/zygote_communication_linux.h" |
| #include "content/browser/zygote_host/zygote_host_impl_linux.h" |
| #include "content/common/sandbox_linux/sandbox_linux.h" |
| #include "content/public/browser/content_browser_client.h" |
| #include "content/public/browser/zygote_handle_linux.h" |
| #include "content/public/common/content_client.h" |
| #include "content/public/common/content_switches.h" |
| #include "content/public/common/result_codes.h" |
| #include "content/public/common/sandboxed_process_launcher_delegate.h" |
| #include "gin/v8_initializer.h" |
| |
| namespace content { |
| namespace internal { |
| |
| mojo::edk::ScopedPlatformHandle |
| ChildProcessLauncherHelper::PrepareMojoPipeHandlesOnClientThread() { |
| DCHECK_CURRENTLY_ON(client_thread_id_); |
| return mojo::edk::ScopedPlatformHandle(); |
| } |
| |
| void ChildProcessLauncherHelper::BeforeLaunchOnClientThread() { |
| DCHECK_CURRENTLY_ON(client_thread_id_); |
| } |
| |
| std::unique_ptr<FileMappedForLaunch> |
| ChildProcessLauncherHelper::GetFilesToMap() { |
| DCHECK_CURRENTLY_ON(BrowserThread::PROCESS_LAUNCHER); |
| return CreateDefaultPosixFilesToMap(child_process_id(), mojo_client_handle(), |
| true /* include_service_required_files */, |
| GetProcessType(), command_line()); |
| } |
| |
| void ChildProcessLauncherHelper::BeforeLaunchOnLauncherThread( |
| const FileDescriptorInfo& files_to_register, |
| base::LaunchOptions* options) { |
| // Convert FD mapping to FileHandleMappingVector |
| std::unique_ptr<base::FileHandleMappingVector> fds_to_map = |
| files_to_register.GetMappingWithIDAdjustment( |
| base::GlobalDescriptors::kBaseDescriptor); |
| |
| if (GetProcessType() == switches::kRendererProcess) { |
| const int sandbox_fd = |
| RenderSandboxHostLinux::GetInstance()->GetRendererSocket(); |
| fds_to_map->push_back(std::make_pair(sandbox_fd, GetSandboxFD())); |
| } |
| |
| options->environ = delegate_->GetEnvironment(); |
| // fds_to_remap will de deleted in AfterLaunchOnLauncherThread() below. |
| options->fds_to_remap = fds_to_map.release(); |
| } |
| |
| ChildProcessLauncherHelper::Process |
| ChildProcessLauncherHelper::LaunchProcessOnLauncherThread( |
| const base::LaunchOptions& options, |
| std::unique_ptr<FileMappedForLaunch> files_to_register, |
| bool* is_synchronous_launch, |
| int* launch_result) { |
| *is_synchronous_launch = true; |
| |
| ZygoteHandle* zygote_handle = |
| base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kNoZygote) ? |
| nullptr : delegate_->GetZygote(); |
| if (zygote_handle) { |
| // This code runs on the PROCESS_LAUNCHER thread so race conditions are not |
| // an issue with the lazy initialization. |
| if (*zygote_handle == nullptr) { |
| *zygote_handle = CreateZygote(); |
| } |
| base::ProcessHandle handle = (*zygote_handle)->ForkRequest( |
| command_line()->argv(), |
| std::move(files_to_register), |
| GetProcessType()); |
| *launch_result = LAUNCH_RESULT_SUCCESS; |
| Process process; |
| process.process = base::Process(handle); |
| process.zygote = *zygote_handle; |
| return process; |
| } |
| |
| Process process; |
| process.process = base::LaunchProcess(*command_line(), options); |
| *launch_result = process.process.IsValid() ? LAUNCH_RESULT_SUCCESS |
| : LAUNCH_RESULT_FAILURE; |
| return process; |
| } |
| |
| void ChildProcessLauncherHelper::AfterLaunchOnLauncherThread( |
| const ChildProcessLauncherHelper::Process& process, |
| const base::LaunchOptions& options) { |
| delete options.fds_to_remap; |
| } |
| |
| base::TerminationStatus ChildProcessLauncherHelper::GetTerminationStatus( |
| const ChildProcessLauncherHelper::Process& process, |
| bool known_dead, |
| int* exit_code) { |
| if (process.zygote) { |
| return process.zygote->GetTerminationStatus( |
| process.process.Handle(), known_dead, exit_code); |
| } |
| if (known_dead) { |
| return base::GetKnownDeadTerminationStatus( |
| process.process.Handle(), exit_code); |
| } |
| return base::GetTerminationStatus(process.process.Handle(), exit_code); |
| } |
| |
| // static |
| bool ChildProcessLauncherHelper::TerminateProcess( |
| const base::Process& process, int exit_code, bool wait) { |
| return process.Terminate(exit_code, wait); |
| } |
| |
| // static |
| void ChildProcessLauncherHelper::ForceNormalProcessTerminationSync( |
| ChildProcessLauncherHelper::Process process) { |
| process.process.Terminate(RESULT_CODE_NORMAL_EXIT, false); |
| // On POSIX, we must additionally reap the child. |
| if (process.zygote) { |
| // If the renderer was created via a zygote, we have to proxy the reaping |
| // through the zygote process. |
| process.zygote->EnsureProcessTerminated(process.process.Handle()); |
| } else { |
| base::EnsureProcessTerminated(std::move(process.process)); |
| } |
| } |
| |
| void ChildProcessLauncherHelper::SetProcessBackgroundedOnLauncherThread( |
| base::Process process, bool background) { |
| DCHECK_CURRENTLY_ON(BrowserThread::PROCESS_LAUNCHER); |
| if (process.CanBackgroundProcesses()) |
| process.SetProcessBackgrounded(background); |
| } |
| |
| // static |
| void ChildProcessLauncherHelper::SetRegisteredFilesForService( |
| const std::string& service_name, |
| catalog::RequiredFileMap required_files) { |
| SetFilesToShareForServicePosix(service_name, std::move(required_files)); |
| } |
| |
| // static |
| void ChildProcessLauncherHelper::ResetRegisteredFilesForTesting() { |
| ResetFilesToShareForTestingPosix(); |
| } |
| |
| // static |
| base::File OpenFileToShare(const base::FilePath& path, |
| base::MemoryMappedFile::Region* region) { |
| base::FilePath exe_dir; |
| bool result = base::PathService::Get(base::BasePathKey::DIR_EXE, &exe_dir); |
| DCHECK(result); |
| base::File file(exe_dir.Append(path), |
| base::File::FLAG_OPEN | base::File::FLAG_READ); |
| *region = base::MemoryMappedFile::Region::kWholeFile; |
| return file; |
| } |
| |
| } // namespace internal |
| } // namespace content |