dyldSharedLibraryLoader.cpp

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00001 /*******************************************************************************
00002 * Copyright (C) 2004 Vintela, Inc. All rights reserved.
00003 * Copyright (C) 2005 Novell, Inc. All rights reserved.
00004 *
00005 * Redistribution and use in source and binary forms, with or without
00006 * modification, are permitted provided that the following conditions are met:
00007 *
00008 *  - Redistributions of source code must retain the above copyright notice,
00009 *    this list of conditions and the following disclaimer.
00010 *
00011 *  - Redistributions in binary form must reproduce the above copyright notice,
00012 *    this list of conditions and the following disclaimer in the documentation
00013 *    and/or other materials provided with the distribution.
00014 *
00015 *  - Neither the name of Vintela, Inc., Novell, Inc., nor the names of its
00016 *    contributors may be used to endorse or promote products derived from this
00017 *    software without specific prior written permission.
00018 *
00019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
00020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00021 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00022 * ARE DISCLAIMED. IN NO EVENT SHALL Vintela, Inc., Novell, Inc., OR THE 
00023 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
00024 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
00025 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
00026 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
00027 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
00028 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
00029 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00030 *******************************************************************************/
00031 
00032 
00037 #include "blocxx/BLOCXX_config.h"
00038 #if defined(BLOCXX_USE_DYLD)
00039 #include "blocxx/dyldSharedLibraryLoader.hpp"
00040 #include "blocxx/dyldSharedLibrary.hpp"
00041 #include "blocxx/Format.hpp"
00042 
00043 namespace BLOCXX_NAMESPACE
00044 {
00045 
00046 std::ostream& operator<<(std::ostream& o, NSObjectFileImageReturnCode code)
00047 {
00048 #define SIMPLE_NSOBJ_CASE(X) case X: o << ""#X
00049    switch (code)
00050    {
00051       SIMPLE_NSOBJ_CASE(NSObjectFileImageFailure);
00052       break;
00053       SIMPLE_NSOBJ_CASE(NSObjectFileImageSuccess);
00054       break;
00055       SIMPLE_NSOBJ_CASE(NSObjectFileImageInappropriateFile);
00056       break;
00057       SIMPLE_NSOBJ_CASE(NSObjectFileImageArch);
00058       break;
00059       SIMPLE_NSOBJ_CASE(NSObjectFileImageFormat);
00060       break;
00061       SIMPLE_NSOBJ_CASE(NSObjectFileImageAccess);
00062       break;
00063    }
00064 #undef SIMPLE_NSOBJ_CASE
00065    return o;
00066 }
00067 
00069 SharedLibraryRef
00070 dyldSharedLibraryLoader::loadSharedLibrary(const String& filename,
00071    const LoggerRef& logger) const
00072 {
00073    BLOCXX_LOG_DEBUG(logger, Format("Load request for %1 received.", filename));
00074    NSObjectFileImage image = 0;
00075    NSObjectFileImageReturnCode dsoerr = NSCreateObjectFileImageFromFile(filename.c_str(), &image);
00076    const char* err_msg = NULL;
00077    NSModule libhandle = NULL; 
00078 
00079    if (dsoerr == NSObjectFileImageSuccess)
00080    {
00081       libhandle = NSLinkModule(image, filename.c_str(), NSLINKMODULE_OPTION_RETURN_ON_ERROR | NSLINKMODULE_OPTION_PRIVATE);      
00082       if (!libhandle)
00083       {
00084          NSLinkEditErrors errors;
00085          int errorNumber;
00086          const char *fileName;
00087          NSLinkEditError(&errors, &errorNumber, &fileName, &err_msg);
00088       }
00089       NSDestroyObjectFileImage(image);
00090    }
00091    else if ((dsoerr == NSObjectFileImageFormat ||
00092                dsoerr == NSObjectFileImageInappropriateFile) &&
00093                NSAddLibrary(filename.c_str()) == TRUE)
00094    {
00095       BLOCXX_LOG_ERROR(logger, Format("NSCreateObject: %1 failed with error \"%2\"",
00096                                           filename, dsoerr));
00097       // libhandle = (NSModule)DYLD_LIBRARY_HANDLE;
00098    }
00099    else
00100    {
00101       err_msg = "cannot create object file image or add library";
00102       BLOCXX_LOG_ERROR(logger, Format("NSCreateObject: %1 failed with error %2",
00103                                           filename, dsoerr));
00104    }
00105 
00106 
00107 
00108    if (libhandle)
00109    {
00110       try
00111       {
00112          return SharedLibraryRef( new dyldSharedLibrary(libhandle,
00113                                                                                filename));
00114       }
00115       catch (...)
00116       {
00117          NSUnLinkModule(libhandle, FALSE);
00118          throw;
00119       }
00120    }
00121    else
00122    {
00123       BLOCXX_LOG_ERROR(logger, Format("dyldSharedLibraryLoader::loadSharedLibrary:"
00124                                           " %1", err_msg));
00125       return SharedLibraryRef( 0 );
00126    }
00127 }
00129 SharedLibraryLoaderRef
00130 SharedLibraryLoader::createSharedLibraryLoader()
00131 {
00132    return SharedLibraryLoaderRef(new dyldSharedLibraryLoader);
00133 }
00135 dyldSharedLibraryLoader::~dyldSharedLibraryLoader()
00136 {
00137 }
00138 
00139 } // end namespace BLOCXX_NAMESPACE
00140 
00141 #endif // #if defined(BLOCXX_USE_DYLD)

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