DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (920bcf17a9e1)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is XPCOM utility functions for Mac OS X
 *
 * The Initial Developer of the Original Code is Google Inc.
 * Portions created by the Initial Developer are Copyright (C) 2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Mark Mentovai <mark@moxienet.com> (Original Author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsMacUtilsImpl.h"

#include <CoreFoundation/CoreFoundation.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/sysctl.h>
#include <mach-o/fat.h>

NS_IMPL_ISUPPORTS1(nsMacUtilsImpl, nsIMacUtils)

/* readonly attribute boolean isUniversalBinary; */
// True when the main executable is a fat file supporting at least
// ppc and x86 (universal binary).
NS_IMETHODIMP nsMacUtilsImpl::GetIsUniversalBinary(PRBool *aIsUniversalBinary)
{
  static PRBool sInitialized = PR_FALSE,
                sIsUniversalBinary = PR_FALSE;

  if (sInitialized) {
    *aIsUniversalBinary = sIsUniversalBinary;
    return NS_OK;
  }

  PRBool foundPPC = PR_FALSE,
         foundX86 = PR_FALSE;
  CFURLRef executableURL = nsnull;
  int fd = -1;

  CFBundleRef mainBundle;
  if (!(mainBundle = ::CFBundleGetMainBundle()))
    goto done;

  if (!(executableURL = ::CFBundleCopyExecutableURL(mainBundle)))
    goto done;

  char executablePath[PATH_MAX];
  if (!::CFURLGetFileSystemRepresentation(executableURL, PR_TRUE,
                                          (UInt8*) executablePath,
                                          sizeof(executablePath)))
    goto done;

  if ((fd = open(executablePath, O_RDONLY)) == -1)
    goto done;

  struct fat_header fatHeader;
  if (read(fd, &fatHeader, sizeof(fatHeader)) != sizeof(fatHeader))
    goto done;

  // The fat header is always stored on disk as big-endian.
  fatHeader.magic = CFSwapInt32BigToHost(fatHeader.magic);
  fatHeader.nfat_arch = CFSwapInt32BigToHost(fatHeader.nfat_arch);

  // Main executable is thin.
  if (fatHeader.magic != FAT_MAGIC)
    goto done;

  // Loop over each architecture in the file.  We're presently only
  // interested in 32-bit PPC and x86.
  for (PRUint32 i = 0 ; i < fatHeader.nfat_arch ; i++) {
    struct fat_arch fatArch;
    if (read(fd, &fatArch, sizeof(fatArch)) != sizeof(fatArch))
      goto done;

    // This is still part of the fat header, so byte-swap as needed.
    fatArch.cputype = CFSwapInt32BigToHost(fatArch.cputype);

    // Don't mask out the ABI bits.  This allows identification of ppc64
    // as distinct from ppc.  CPU_TYPE_X86 is preferred to CPU_TYPE_I386
    // but does not exist prior to the 10.4 headers.
    if (fatArch.cputype == CPU_TYPE_POWERPC)
      foundPPC = PR_TRUE;
    else if (fatArch.cputype == CPU_TYPE_I386)
      foundX86 = PR_TRUE;
  }

  if (foundPPC && foundX86)
    sIsUniversalBinary = PR_TRUE;

done:
  if (fd != -1)
    close(fd);
  if (executableURL)
    ::CFRelease(executableURL);

  *aIsUniversalBinary = sIsUniversalBinary;
  sInitialized = PR_TRUE;

  return NS_OK;
}

/* readonly attribute boolean isTranslated; */
// True when running under binary translation (Rosetta).
NS_IMETHODIMP nsMacUtilsImpl::GetIsTranslated(PRBool *aIsTranslated)
{
#ifdef __ppc__
  static PRBool  sInitialized = PR_FALSE;

  // Initialize sIsNative to 1.  If the sysctl fails because it doesn't
  // exist, then translation is not possible, so the process must not be
  // running translated.
  static PRInt32 sIsNative = 1;

  if (!sInitialized) {
    size_t sz = sizeof(sIsNative);
    sysctlbyname("sysctl.proc_native", &sIsNative, &sz, NULL, 0);
    sInitialized = PR_TRUE;
  }

  *aIsTranslated = !sIsNative;
#else
  // Translation only exists for ppc code.  Other architectures aren't
  // translated.
  *aIsTranslated = PR_FALSE;
#endif

  return NS_OK;
}