gecko-dev/xpcom/base/nsMacUtilsImpl.cpp

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5.1 KiB
C++

/* -*- 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;
}