1 files changed, 118 insertions, 0 deletions
diff --git a/ipc/chromium/src/base/process_util_mac.mm b/ipc/chromium/src/base/process_util_mac.mm
new file mode 100644
index 0000000000..44db73c740
--- /dev/null
+++ b/ipc/chromium/src/base/process_util_mac.mm
@@ -0,0 +1,118 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 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/process_util.h"
+
+#include <fcntl.h>
+#include <spawn.h>
+#include <sys/wait.h>
+
+#include <string>
+
+#include "base/command_line.h"
+#include "base/eintr_wrapper.h"
+#include "base/logging.h"
+#include "mozilla/ipc/FileDescriptorShuffle.h"
+#include "mozilla/ScopeExit.h"
+
+namespace {
+
+static mozilla::EnvironmentLog gProcessLog("MOZ_PROCESS_LOG");
+
+}  // namespace
+
+namespace base {
+
+bool LaunchApp(const std::vector<std::string>& argv, const LaunchOptions& options,
+               ProcessHandle* process_handle) {
+  bool retval = true;
+
+  char* argv_copy[argv.size() + 1];
+  for (size_t i = 0; i < argv.size(); i++) {
+    argv_copy[i] = const_cast<char*>(argv[i].c_str());
+  }
+  argv_copy[argv.size()] = NULL;
+
+  EnvironmentArray vars = BuildEnvironmentArray(options.env_map);
+
+  posix_spawn_file_actions_t file_actions;
+  if (posix_spawn_file_actions_init(&file_actions) != 0) {
+    return false;
+  }
+  auto file_actions_guard =
+      mozilla::MakeScopeExit([&file_actions] { posix_spawn_file_actions_destroy(&file_actions); });
+
+  // Turn fds_to_remap array into a set of dup2 calls.
+  mozilla::ipc::FileDescriptorShuffle shuffle;
+  if (!shuffle.Init(options.fds_to_remap)) {
+    return false;
+  }
+  for (const auto& fd_map : shuffle.Dup2Sequence()) {
+    int src_fd = fd_map.first;
+    int dest_fd = fd_map.second;
+
+    if (posix_spawn_file_actions_adddup2(&file_actions, src_fd, dest_fd) != 0) {
+      return false;
+    }
+  }
+
+  // Initialize spawn attributes.
+  posix_spawnattr_t spawnattr;
+  if (posix_spawnattr_init(&spawnattr) != 0) {
+    return false;
+  }
+  auto spawnattr_guard =
+      mozilla::MakeScopeExit([&spawnattr] { posix_spawnattr_destroy(&spawnattr); });
+
+#if defined(XP_MACOSX) && defined(__aarch64__)
+  if (options.arch == PROCESS_ARCH_X86_64) {
+    cpu_type_t cpu_pref = CPU_TYPE_X86_64;
+    size_t count = 1;
+    size_t ocount = 0;
+    int rv;
+    rv = posix_spawnattr_setbinpref_np(&spawnattr, count, &cpu_pref, &ocount);
+    if ((rv != 0) || (ocount != count)) {
+      return false;
+    }
+  }
+#endif
+
+  // Prevent the child process from inheriting any file descriptors
+  // that aren't named in `file_actions`.  (This is an Apple-specific
+  // extension to posix_spawn.)
+  if (posix_spawnattr_setflags(&spawnattr, POSIX_SPAWN_CLOEXEC_DEFAULT) != 0) {
+    return false;
+  }
+
+  // Exempt std{in,out,err} from being closed by POSIX_SPAWN_CLOEXEC_DEFAULT.
+  for (int fd = 0; fd <= STDERR_FILENO; ++fd) {
+    if (posix_spawn_file_actions_addinherit_np(&file_actions, fd) != 0) {
+      return false;
+    }
+  }
+
+  int pid = 0;
+  int spawn_succeeded =
+      (posix_spawnp(&pid, argv_copy[0], &file_actions, &spawnattr, argv_copy, vars.get()) == 0);
+
+  bool process_handle_valid = pid > 0;
+  if (!spawn_succeeded || !process_handle_valid) {
+    retval = false;
+  } else {
+    gProcessLog.print("==> process %d launched child process %d\n", GetCurrentProcId(), pid);
+    if (options.wait) HANDLE_EINTR(waitpid(pid, 0, 0));
+
+    if (process_handle) *process_handle = pid;
+  }
+
+  return retval;
+}
+
+bool LaunchApp(const CommandLine& cl, const LaunchOptions& options, ProcessHandle* process_handle) {
+  return LaunchApp(cl.argv(), options, process_handle);
+}
+
+}  // namespace base