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