dyld3/BootArgs.cpp

   1 /*
   2 * Copyright (c) 2017 Apple Inc. All rights reserved.
   3 *
   4 * @APPLE_LICENSE_HEADER_START@
   5 *
   6 * This file contains Original Code and/or Modifications of Original Code
   7 * as defined in and that are subject to the Apple Public Source License
   8 * Version 2.0 (the 'License'). You may not use this file except in
   9 * compliance with the License. Please obtain a copy of the License at
  10 * http://www.opensource.apple.com/apsl/ and read it before using this
  11 * file.
  12 *
  13 * The Original Code and all software distributed under the License are
  14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18 * Please see the License for the specific language governing rights and
  19 * limitations under the License.
  20 *
  21 * @APPLE_LICENSE_HEADER_END@
  22 */
  23
  24 #include <sys/types.h>
  25 #include <sys/sysctl.h>
  26 #include <TargetConditionals.h>
  27
  28 #include "Loading.h" // For internalInstall()
  29 #include "BootArgs.h"
  30
  31 namespace dyld {
  32 #if defined(__x86_64__) && !TARGET_OS_SIMULATOR
  33     bool isTranslated();
  34 #endif
  35 }
  36
  37 namespace dyld3 {
  38
  39 uint64_t BootArgs::_flags = 0;
  40
  41 bool BootArgs::forceCustomerCache() {
  42     return (_flags & kForceCustomerCacheMask);
  43 }
  44
  45 bool BootArgs::forceDevelopmentCache() {
  46     return (_flags & kForceDevelopmentCacheMask);
  47 }
  48
  49 bool BootArgs::forceDyld2() {
  50 #if defined(__x86_64__) && !TARGET_OS_SIMULATOR
  51     if (dyld::isTranslated()) { return true; }
  52 #endif
  53     // If both force dyld2 and dyld3 are set then use dyld3
  54     if (_flags & kForceDyld3CacheMask) { return false; }
  55     if (_flags & kForceDyld2CacheMask) { return true; }
  56     return false;
  57 }
  58
  59 bool BootArgs::forceDyld3() {
  60     return (_flags & kForceDyld3CacheMask);
  61 }
  62
  63 bool BootArgs::enableDyldTestMode() {
  64     return (_flags & kDyldTestModeMask);
  65 }
  66
  67 bool BootArgs::enableCompactImageInfo() {
  68     return (_flags & kEnableCompactImageInfoMask);
  69 }
  70
  71 void BootArgs::setFlags(uint64_t flags) {
  72 #if TARGET_IPHONE_SIMULATOR
  73     return;
  74 #else
  75     // don't check for boot-args on customer installs
  76     if ( !internalInstall() )
  77         return;
  78     _flags = flags;
  79 #endif
  80 }
  81 };