content/browser/child_process_launcher_helper_ios.cc

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/mac/mach_port_rendezvous.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/public/browser/child_process_launcher_utils.h"

namespace content {
namespace internal {

// TODO(crbug.com/1412835): Fill this class out.

absl::optional<mojo::NamedPlatformChannel>
ChildProcessLauncherHelper::CreateNamedPlatformChannelOnLauncherThread() {
  DCHECK(CurrentlyOnProcessLauncherTaskRunner());
  return absl::nullopt;
}

void ChildProcessLauncherHelper::BeforeLaunchOnClientThread() {
  DCHECK(client_task_runner_->RunsTasksInCurrentSequence());
}

std::unique_ptr<PosixFileDescriptorInfo>
ChildProcessLauncherHelper::GetFilesToMap() {
  DCHECK(CurrentlyOnProcessLauncherTaskRunner());
  return CreateDefaultPosixFilesToMap(
      child_process_id(), mojo_channel_->remote_endpoint(),
      /*files_to_preload=*/{}, GetProcessType(), command_line());
}

bool ChildProcessLauncherHelper::BeforeLaunchOnLauncherThread(
    FileMappedForLaunch& files_to_register,
    base::LaunchOptions* options) {
  mojo::PlatformHandle endpoint =
      mojo_channel_->TakeRemoteEndpoint().TakePlatformHandle();
  DCHECK(endpoint.is_valid_mach_receive());
  options->mach_ports_for_rendezvous.insert(std::make_pair(
      'mojo', base::MachRendezvousPort(endpoint.TakeMachReceiveRight())));
  return true;
}

ChildProcessLauncherHelper::Process
ChildProcessLauncherHelper::LaunchProcessOnLauncherThread(
    const base::LaunchOptions* options,
    std::unique_ptr<PosixFileDescriptorInfo> files_to_register,
    bool* is_synchronous_launch,
    int* launch_result) {
  DCHECK(options);
  *is_synchronous_launch = true;
  ChildProcessLauncherHelper::Process process;
  process.process = base::LaunchProcess(*command_line(), *options);
  *launch_result =
      process.process.IsValid() ? LAUNCH_RESULT_SUCCESS : LAUNCH_RESULT_FAILURE;
  return process;
}

bool ChildProcessLauncherHelper::IsUsingLaunchOptions() {
  return true;
}

void ChildProcessLauncherHelper::AfterLaunchOnLauncherThread(
    const ChildProcessLauncherHelper::Process& process,
    const base::LaunchOptions* options) {}

ChildProcessTerminationInfo ChildProcessLauncherHelper::GetTerminationInfo(
    const ChildProcessLauncherHelper::Process& process,
    bool known_dead) {
  ChildProcessTerminationInfo info;
  return info;
}

// static
bool ChildProcessLauncherHelper::TerminateProcess(const base::Process& process,
                                                  int exit_code) {
  // TODO(https://crbug.com/818244): Determine whether we should also call
  // EnsureProcessTerminated() to make sure of process-exit, and reap it.
  return process.Terminate(exit_code, false);
}

// static
void ChildProcessLauncherHelper::ForceNormalProcessTerminationSync(
    ChildProcessLauncherHelper::Process process) {
  DCHECK(CurrentlyOnProcessLauncherTaskRunner());
  // Client has gone away, so just kill the process.  Using exit code 0 means
  // that UMA won't treat this as a crash.
  process.process.Terminate(RESULT_CODE_NORMAL_EXIT, false);
  base::EnsureProcessTerminated(std::move(process.process));
}

void ChildProcessLauncherHelper::SetProcessBackgroundedOnLauncherThread(
    base::Process process,
    bool is_background) {}

// static
base::File OpenFileToShare(const base::FilePath& path,
                           base::MemoryMappedFile::Region* region) {
  // Not used yet (until required files are described in the service manifest on
  // iOS).
  NOTREACHED();
  return base::File();
}

}  //  namespace internal
}  // namespace content