532 lines
15 KiB
C++
532 lines
15 KiB
C++
/*============================================================================
|
|
KWSys - Kitware System Library
|
|
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
|
|
|
|
Distributed under the OSI-approved BSD License (the "License");
|
|
see accompanying file Copyright.txt for details.
|
|
|
|
This software is distributed WITHOUT ANY WARRANTY; without even the
|
|
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
See the License for more information.
|
|
============================================================================*/
|
|
#include "kwsysPrivate.h"
|
|
#include KWSYS_HEADER(DynamicLoader.hxx)
|
|
|
|
#include KWSYS_HEADER(Configure.hxx)
|
|
|
|
// Work-around CMake dependency scanning limitation. This must
|
|
// duplicate the above list of headers.
|
|
#if 0
|
|
# include "DynamicLoader.hxx.in"
|
|
# include "Configure.hxx.in"
|
|
#endif
|
|
|
|
// This file is actually 3 different implementations.
|
|
// 1. HP machines which uses shl_load
|
|
// 2. Mac OS X 10.2.x and earlier which uses NSLinkModule
|
|
// 3. Windows which uses LoadLibrary
|
|
// 4. Most unix systems (including Mac OS X 10.3 and later) which use dlopen
|
|
// (default) Each part of the ifdef contains a complete implementation for
|
|
// the static methods of DynamicLoader.
|
|
|
|
// ---------------------------------------------------------------
|
|
// 1. Implementation for HPUX machines
|
|
#ifdef __hpux
|
|
#include <errno.h>
|
|
#include <dl.h>
|
|
#define DYNAMICLOADER_DEFINED 1
|
|
|
|
namespace KWSYS_NAMESPACE
|
|
{
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::LibraryHandle DynamicLoader::OpenLibrary(const std::string& libname )
|
|
{
|
|
return shl_load(libname.c_str(), BIND_DEFERRED | DYNAMIC_PATH, 0L);
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
int DynamicLoader::CloseLibrary(DynamicLoader::LibraryHandle lib)
|
|
{
|
|
if (!lib)
|
|
{
|
|
return 0;
|
|
}
|
|
return !shl_unload(lib);
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::SymbolPointer
|
|
DynamicLoader::GetSymbolAddress(DynamicLoader::LibraryHandle lib, const std::string& sym)
|
|
{
|
|
void* addr;
|
|
int status;
|
|
|
|
/* TYPE_PROCEDURE Look for a function or procedure. (This used to be default)
|
|
* TYPE_DATA Look for a symbol in the data segment (for example, variables).
|
|
* TYPE_UNDEFINED Look for any symbol.
|
|
*/
|
|
status = shl_findsym (&lib, sym.c_str(), TYPE_UNDEFINED, &addr);
|
|
void* result = (status < 0) ? (void*)0 : addr;
|
|
|
|
// Hack to cast pointer-to-data to pointer-to-function.
|
|
return *reinterpret_cast<DynamicLoader::SymbolPointer*>(&result);
|
|
}
|
|
|
|
const char* DynamicLoader::LastError()
|
|
{
|
|
// TODO: Need implementation with errno/strerror
|
|
/* If successful, shl_findsym returns an integer (int) value zero. If
|
|
* shl_findsym cannot find sym, it returns -1 and sets errno to zero.
|
|
* If any other errors occur, shl_findsym returns -1 and sets errno to one
|
|
* of these values (defined in <errno.h>):
|
|
* ENOEXEC
|
|
* A format error was detected in the specified library.
|
|
* ENOSYM
|
|
* A symbol on which sym depends could not be found.
|
|
* EINVAL
|
|
* The specified handle is invalid.
|
|
*/
|
|
|
|
if( errno == ENOEXEC
|
|
|| errno == ENOSYM
|
|
|| errno == EINVAL )
|
|
{
|
|
return strerror(errno);
|
|
}
|
|
// else
|
|
return 0;
|
|
}
|
|
|
|
} // namespace KWSYS_NAMESPACE
|
|
|
|
#endif //__hpux
|
|
|
|
|
|
// ---------------------------------------------------------------
|
|
// 2. Implementation for Mac OS X 10.2.x and earlier
|
|
#ifdef __APPLE__
|
|
#if MAC_OS_X_VERSION_MAX_ALLOWED < 1030
|
|
#include <string.h> // for strlen
|
|
#include <mach-o/dyld.h>
|
|
#define DYNAMICLOADER_DEFINED 1
|
|
|
|
namespace KWSYS_NAMESPACE
|
|
{
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::LibraryHandle DynamicLoader::OpenLibrary(const std::string& libname )
|
|
{
|
|
NSObjectFileImageReturnCode rc;
|
|
NSObjectFileImage image = 0;
|
|
|
|
rc = NSCreateObjectFileImageFromFile(libname.c_str(), &image);
|
|
// rc == NSObjectFileImageInappropriateFile when trying to load a dylib file
|
|
if( rc != NSObjectFileImageSuccess )
|
|
{
|
|
return 0;
|
|
}
|
|
NSModule handle = NSLinkModule(image, libname.c_str(),
|
|
NSLINKMODULE_OPTION_BINDNOW|NSLINKMODULE_OPTION_RETURN_ON_ERROR);
|
|
NSDestroyObjectFileImage(image);
|
|
return handle;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
int DynamicLoader::CloseLibrary( DynamicLoader::LibraryHandle lib)
|
|
{
|
|
// NSUNLINKMODULE_OPTION_KEEP_MEMORY_MAPPED
|
|
// With this option the memory for the module is not deallocated
|
|
// allowing pointers into the module to still be valid.
|
|
// You should use this option instead if your code experience some problems
|
|
// reported against Panther 10.3.9 (fixed in Tiger 10.4.2 and up)
|
|
bool success = NSUnLinkModule(lib, NSUNLINKMODULE_OPTION_NONE);
|
|
return success;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::SymbolPointer DynamicLoader::GetSymbolAddress(
|
|
DynamicLoader::LibraryHandle lib, const std::string& sym)
|
|
{
|
|
void *result=0;
|
|
// Need to prepend symbols with '_' on Apple-gcc compilers
|
|
size_t len = sym.size();
|
|
char *rsym = new char[len + 1 + 1];
|
|
strcpy(rsym, "_");
|
|
strcat(rsym+1, sym.c_str());
|
|
|
|
NSSymbol symbol = NSLookupSymbolInModule(lib, rsym);
|
|
if(symbol)
|
|
{
|
|
result = NSAddressOfSymbol(symbol);
|
|
}
|
|
|
|
delete[] rsym;
|
|
// Hack to cast pointer-to-data to pointer-to-function.
|
|
return *reinterpret_cast<DynamicLoader::SymbolPointer*>(&result);
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
const char* DynamicLoader::LastError()
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
} // namespace KWSYS_NAMESPACE
|
|
|
|
#endif // MAC_OS_X_VERSION_MAX_ALLOWED < 1030
|
|
#endif // __APPLE__
|
|
|
|
// ---------------------------------------------------------------
|
|
// 3. Implementation for Windows win32 code but not cygwin
|
|
#if defined(_WIN32) && !defined(__CYGWIN__)
|
|
#include <windows.h>
|
|
#define DYNAMICLOADER_DEFINED 1
|
|
|
|
namespace KWSYS_NAMESPACE
|
|
{
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::LibraryHandle DynamicLoader::OpenLibrary(const std::string& libname)
|
|
{
|
|
DynamicLoader::LibraryHandle lh;
|
|
int length = MultiByteToWideChar(CP_UTF8, 0, libname.c_str(), -1, NULL, 0);
|
|
wchar_t* wchars = new wchar_t[length+1];
|
|
wchars[0] = '\0';
|
|
MultiByteToWideChar(CP_UTF8, 0, libname.c_str(), -1, wchars, length);
|
|
lh = LoadLibraryW(wchars);
|
|
delete [] wchars;
|
|
return lh;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
int DynamicLoader::CloseLibrary(DynamicLoader::LibraryHandle lib)
|
|
{
|
|
return (int)FreeLibrary(lib);
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::SymbolPointer DynamicLoader::GetSymbolAddress(
|
|
DynamicLoader::LibraryHandle lib, const std::string& sym)
|
|
{
|
|
// TODO: The calling convention affects the name of the symbol. We
|
|
// should have a tool to help get the symbol with the desired
|
|
// calling convention. Currently we assume cdecl.
|
|
//
|
|
// Borland:
|
|
// __cdecl = "_func" (default)
|
|
// __fastcall = "@_func"
|
|
// __stdcall = "func"
|
|
//
|
|
// Watcom:
|
|
// __cdecl = "_func"
|
|
// __fastcall = "@_func@X"
|
|
// __stdcall = "_func@X"
|
|
// __watcall = "func_" (default)
|
|
//
|
|
// MSVC:
|
|
// __cdecl = "func" (default)
|
|
// __fastcall = "@_func@X"
|
|
// __stdcall = "_func@X"
|
|
//
|
|
// Note that the "@X" part of the name above is the total size (in
|
|
// bytes) of the arguments on the stack.
|
|
void *result;
|
|
#if defined(__BORLANDC__) || defined(__WATCOMC__)
|
|
// Need to prepend symbols with '_'
|
|
size_t len = sym.size();
|
|
char *rsym = new char[len + 1 + 1];
|
|
strcpy(rsym, "_");
|
|
strcat(rsym, sym.c_str());
|
|
#else
|
|
const char *rsym = sym.c_str();
|
|
#endif
|
|
result = (void*)GetProcAddress(lib, rsym);
|
|
#if defined(__BORLANDC__) || defined(__WATCOMC__)
|
|
delete[] rsym;
|
|
#endif
|
|
// Hack to cast pointer-to-data to pointer-to-function.
|
|
#ifdef __WATCOMC__
|
|
return *(DynamicLoader::SymbolPointer*)(&result);
|
|
#else
|
|
return *reinterpret_cast<DynamicLoader::SymbolPointer*>(&result);
|
|
#endif
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
const char* DynamicLoader::LastError()
|
|
{
|
|
LPVOID lpMsgBuf=NULL;
|
|
|
|
FormatMessage(
|
|
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
|
|
NULL,
|
|
GetLastError(),
|
|
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
|
|
(LPTSTR) &lpMsgBuf,
|
|
0,
|
|
NULL
|
|
);
|
|
|
|
if(!lpMsgBuf)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static char* str = 0;
|
|
delete [] str;
|
|
str = strcpy(new char[strlen((char*)lpMsgBuf)+1], (char*)lpMsgBuf);
|
|
// Free the buffer.
|
|
LocalFree( lpMsgBuf );
|
|
return str;
|
|
}
|
|
|
|
} // namespace KWSYS_NAMESPACE
|
|
|
|
#endif //_WIN32
|
|
|
|
// ---------------------------------------------------------------
|
|
// 4. Implementation for BeOS
|
|
#if defined __BEOS__
|
|
|
|
#include <string.h> // for strerror()
|
|
|
|
#include <be/kernel/image.h>
|
|
#include <be/support/Errors.h>
|
|
|
|
#define DYNAMICLOADER_DEFINED 1
|
|
|
|
namespace KWSYS_NAMESPACE
|
|
{
|
|
|
|
static image_id last_dynamic_err = B_OK;
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::LibraryHandle DynamicLoader::OpenLibrary(const std::string& libname )
|
|
{
|
|
// image_id's are integers, errors are negative. Add one just in case we
|
|
// get a valid image_id of zero (is that even possible?).
|
|
image_id rc = load_add_on(libname.c_str());
|
|
if (rc < 0)
|
|
{
|
|
last_dynamic_err = rc;
|
|
return 0;
|
|
}
|
|
|
|
return rc+1;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
int DynamicLoader::CloseLibrary(DynamicLoader::LibraryHandle lib)
|
|
{
|
|
if (!lib)
|
|
{
|
|
last_dynamic_err = B_BAD_VALUE;
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
// The function dlclose() returns 0 on success, and non-zero on error.
|
|
status_t rc = unload_add_on(lib-1);
|
|
if (rc != B_OK)
|
|
{
|
|
last_dynamic_err = rc;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::SymbolPointer DynamicLoader::GetSymbolAddress(
|
|
DynamicLoader::LibraryHandle lib, const std::string& sym)
|
|
{
|
|
// Hack to cast pointer-to-data to pointer-to-function.
|
|
union
|
|
{
|
|
void* pvoid;
|
|
DynamicLoader::SymbolPointer psym;
|
|
} result;
|
|
|
|
result.psym = NULL;
|
|
|
|
if (!lib)
|
|
{
|
|
last_dynamic_err = B_BAD_VALUE;
|
|
}
|
|
else
|
|
{
|
|
// !!! FIXME: BeOS can do function-only lookups...does this ever
|
|
// !!! FIXME: actually _want_ a data symbol lookup, or was this union
|
|
// !!! FIXME: a leftover of dlsym()? (s/ANY/TEXT for functions only).
|
|
status_t rc = get_image_symbol(lib-1,sym.c_str(),B_SYMBOL_TYPE_ANY,&result.pvoid);
|
|
if (rc != B_OK)
|
|
{
|
|
last_dynamic_err = rc;
|
|
result.psym = NULL;
|
|
}
|
|
}
|
|
return result.psym;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
const char* DynamicLoader::LastError()
|
|
{
|
|
const char *retval = strerror(last_dynamic_err);
|
|
last_dynamic_err = B_OK;
|
|
return retval;
|
|
}
|
|
|
|
} // namespace KWSYS_NAMESPACE
|
|
#endif
|
|
|
|
// ---------------------------------------------------------------
|
|
// 5. Implementation for systems without dynamic libs
|
|
// __gnu_blrts__ is IBM BlueGene/L
|
|
// __LIBCATAMOUNT__ is defined on Catamount on Cray compute nodes
|
|
#if defined(__gnu_blrts__) || defined(__LIBCATAMOUNT__) || defined(__CRAYXT_COMPUTE_LINUX_TARGET)
|
|
#include <string.h> // for strerror()
|
|
#define DYNAMICLOADER_DEFINED 1
|
|
|
|
namespace KWSYS_NAMESPACE
|
|
{
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::LibraryHandle DynamicLoader::OpenLibrary(const std::string& libname )
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
int DynamicLoader::CloseLibrary(DynamicLoader::LibraryHandle lib)
|
|
{
|
|
if (!lib)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::SymbolPointer DynamicLoader::GetSymbolAddress(
|
|
DynamicLoader::LibraryHandle lib, const std::string& sym)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
const char* DynamicLoader::LastError()
|
|
{
|
|
return "General error";
|
|
}
|
|
|
|
} // namespace KWSYS_NAMESPACE
|
|
#endif
|
|
|
|
#ifdef __MINT__
|
|
#define DYNAMICLOADER_DEFINED 1
|
|
#define _GNU_SOURCE /* for program_invocation_name */
|
|
#include <string.h>
|
|
#include <malloc.h>
|
|
#include <errno.h>
|
|
#include <dld.h>
|
|
|
|
namespace KWSYS_NAMESPACE
|
|
{
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::LibraryHandle DynamicLoader::OpenLibrary(const std::string& libname )
|
|
{
|
|
char *name = (char *)calloc(1, libname.size() + 1);
|
|
dld_init(program_invocation_name);
|
|
strncpy(name, libname.c_str(), libname.size());
|
|
dld_link(libname.c_str());
|
|
return (void *)name;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
int DynamicLoader::CloseLibrary(DynamicLoader::LibraryHandle lib)
|
|
{
|
|
dld_unlink_by_file((char *)lib, 0);
|
|
free(lib);
|
|
return 0;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::SymbolPointer DynamicLoader::GetSymbolAddress(
|
|
DynamicLoader::LibraryHandle lib, const std::string& sym)
|
|
{
|
|
// Hack to cast pointer-to-data to pointer-to-function.
|
|
union
|
|
{
|
|
void* pvoid;
|
|
DynamicLoader::SymbolPointer psym;
|
|
} result;
|
|
result.pvoid = dld_get_symbol(sym.c_str());
|
|
return result.psym;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
const char* DynamicLoader::LastError()
|
|
{
|
|
return dld_strerror(dld_errno);
|
|
}
|
|
|
|
} // namespace KWSYS_NAMESPACE
|
|
#endif
|
|
|
|
// ---------------------------------------------------------------
|
|
// 6. Implementation for default UNIX machines.
|
|
// if nothing has been defined then use this
|
|
#ifndef DYNAMICLOADER_DEFINED
|
|
#define DYNAMICLOADER_DEFINED 1
|
|
// Setup for most unix machines
|
|
#include <dlfcn.h>
|
|
|
|
namespace KWSYS_NAMESPACE
|
|
{
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::LibraryHandle DynamicLoader::OpenLibrary(const std::string& libname )
|
|
{
|
|
return dlopen(libname.c_str(), RTLD_LAZY);
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
int DynamicLoader::CloseLibrary(DynamicLoader::LibraryHandle lib)
|
|
{
|
|
if (lib)
|
|
{
|
|
// The function dlclose() returns 0 on success, and non-zero on error.
|
|
return !dlclose(lib);
|
|
}
|
|
// else
|
|
return 0;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
DynamicLoader::SymbolPointer DynamicLoader::GetSymbolAddress(
|
|
DynamicLoader::LibraryHandle lib, const std::string& sym)
|
|
{
|
|
// Hack to cast pointer-to-data to pointer-to-function.
|
|
union
|
|
{
|
|
void* pvoid;
|
|
DynamicLoader::SymbolPointer psym;
|
|
} result;
|
|
result.pvoid = dlsym(lib, sym.c_str());
|
|
return result.psym;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
const char* DynamicLoader::LastError()
|
|
{
|
|
return dlerror();
|
|
}
|
|
|
|
} // namespace KWSYS_NAMESPACE
|
|
|
|
#endif
|