michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "MacLaunchHelper.h"
michael@0: 
michael@0: #include "nsMemory.h"
michael@0: #include "nsAutoPtr.h"
michael@0: #include "nsIAppStartup.h"
michael@0: 
michael@0: #include <stdio.h>
michael@0: #include <spawn.h>
michael@0: #include <crt_externs.h>
michael@0: 
michael@0: using namespace mozilla;
michael@0: 
michael@0: namespace {
michael@0: cpu_type_t pref_cpu_types[2] = {
michael@0: #if defined(__i386__)
michael@0:                                  CPU_TYPE_X86,
michael@0: #elif defined(__x86_64__)
michael@0:                                  CPU_TYPE_X86_64,
michael@0: #elif defined(__ppc__)
michael@0:                                  CPU_TYPE_POWERPC,
michael@0: #endif
michael@0:                                  CPU_TYPE_ANY };
michael@0: 
michael@0: cpu_type_t cpu_i386_types[2] = {
michael@0:                                  CPU_TYPE_X86,
michael@0:                                  CPU_TYPE_ANY };
michael@0: 
michael@0: cpu_type_t cpu_x64_86_types[2] = {
michael@0:                                  CPU_TYPE_X86_64,
michael@0:                                  CPU_TYPE_ANY };
michael@0: }
michael@0: 
michael@0: void LaunchChildMac(int aArgc, char** aArgv,
michael@0:                     uint32_t aRestartType, pid_t *pid)
michael@0: {
michael@0:   // "posix_spawnp" uses null termination for arguments rather than a count.
michael@0:   // Note that we are not duplicating the argument strings themselves.
michael@0:   nsAutoArrayPtr<char*> argv_copy(new char*[aArgc + 1]);
michael@0:   for (int i = 0; i < aArgc; i++) {
michael@0:     argv_copy[i] = aArgv[i];
michael@0:   }
michael@0:   argv_copy[aArgc] = NULL;
michael@0: 
michael@0:   // Initialize spawn attributes.
michael@0:   posix_spawnattr_t spawnattr;
michael@0:   if (posix_spawnattr_init(&spawnattr) != 0) {
michael@0:     printf("Failed to init posix spawn attribute.");
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   cpu_type_t *wanted_type = pref_cpu_types;
michael@0:   size_t attr_count = ArrayLength(pref_cpu_types);
michael@0: 
michael@0:   if (aRestartType & nsIAppStartup::eRestarti386) {
michael@0:     wanted_type = cpu_i386_types;
michael@0:     attr_count = ArrayLength(cpu_i386_types);
michael@0:   } else if (aRestartType & nsIAppStartup::eRestartx86_64) {
michael@0:     wanted_type = cpu_x64_86_types;
michael@0:     attr_count = ArrayLength(cpu_x64_86_types);
michael@0:   }
michael@0: 
michael@0:   // Set spawn attributes.
michael@0:   size_t attr_ocount = 0;
michael@0:   if (posix_spawnattr_setbinpref_np(&spawnattr, attr_count, wanted_type, &attr_ocount) != 0 ||
michael@0:       attr_ocount != attr_count) {
michael@0:     printf("Failed to set binary preference on posix spawn attribute.");
michael@0:     posix_spawnattr_destroy(&spawnattr);
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   // Pass along our environment.
michael@0:   char** envp = NULL;
michael@0:   char*** cocoaEnvironment = _NSGetEnviron();
michael@0:   if (cocoaEnvironment) {
michael@0:     envp = *cocoaEnvironment;
michael@0:   }
michael@0: 
michael@0:   int result = posix_spawnp(pid, argv_copy[0], NULL, &spawnattr, argv_copy, envp);
michael@0: 
michael@0:   posix_spawnattr_destroy(&spawnattr);
michael@0: 
michael@0:   if (result != 0) {
michael@0:     printf("Process spawn failed with code %d!", result);
michael@0:   }
michael@0: }