| // Copyright (C) 1999-2005 Open Source Telecom Corporation. |
| // Copyright (C) 2006-2010 David Sugar, Tycho Softworks. |
| // |
| // This program is free software; you can redistribute it and/or modify |
| // it under the terms of the GNU General Public License as published by |
| // the Free Software Foundation; either version 2 of the License, or |
| // (at your option) any later version. |
| // |
| // This program is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| // |
| // You should have received a copy of the GNU General Public License |
| // along with this program; if not, write to the Free Software |
| // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| // |
| // As a special exception, you may use this file as part of a free software |
| // library without restriction. Specifically, if other files instantiate |
| // templates or use macros or inline functions from this file, or you compile |
| // this file and link it with other files to produce an executable, this |
| // file does not by itself cause the resulting executable to be covered by |
| // the GNU General Public License. This exception does not however |
| // invalidate any other reasons why the executable file might be covered by |
| // the GNU General Public License. |
| // |
| // This exception applies only to the code released under the name GNU |
| // Common C++. If you copy code from other releases into a copy of GNU |
| // Common C++, as the General Public License permits, the exception does |
| // not apply to the code that you add in this way. To avoid misleading |
| // anyone as to the status of such modified files, you must delete |
| // this exception notice from them. |
| // |
| // If you write modifications of your own for GNU Common C++, it is your choice |
| // whether to permit this exception to apply to your modifications. |
| // If you do not wish that, delete this exception notice. |
| // |
| |
| #include <cc++/config.h> |
| #include <cc++/export.h> |
| #include <cc++/exception.h> |
| #include <cc++/slog.h> |
| #include <cc++/file.h> |
| #include "private.h" |
| |
| #ifdef CCXX_NAMESPACES |
| namespace ost { |
| #endif |
| |
| #ifdef HAVE_MODULES |
| DSO *DSO::first = NULL; |
| DSO *DSO::last = NULL; |
| Mutex DSO::mutex; |
| |
| #if defined(HAVE_DLFCN_H) |
| |
| extern "C" { |
| #include <dlfcn.h> |
| } |
| |
| #ifndef RTLD_GLOBAL |
| #define RTLD_GLOBAL 0 |
| #endif |
| |
| #endif // HAVE_DLFN_H |
| |
| void DSO::dynunload(void) |
| { |
| while(DSO::last) |
| delete DSO::last; |
| } |
| |
| DSO::~DSO() |
| { |
| #if defined(HAVE_MACH_DYLD) |
| NSSymbol sym; |
| void (*fini)(void); |
| #endif |
| MutexLock lock(mutex); |
| #if defined(WIN32) |
| if(hImage) |
| FreeLibrary(hImage); |
| #elif defined(HAVE_MACH_DYLD) |
| if(oModule == NULL) |
| return; |
| |
| sym = NSLookupSymbolInModule(oModule, "__fini"); |
| if(sym != NULL) { |
| fini = (void (*)(void))NSAddressOfSymbol(sym); |
| fini(); |
| } |
| |
| NSUnLinkModule(oModule, NSUNLINKMODULE_OPTION_NONE); |
| #elif defined(HAVE_SHL_LOAD) |
| if(image) |
| shl_unload(image); |
| #else |
| if(image) |
| dlclose(image); |
| #endif |
| |
| if(first == this && last == this) |
| first = last = NULL; |
| |
| if(!next && !prev) |
| return; |
| |
| if(prev) |
| prev->next = next; |
| |
| if(next) |
| next->prev = prev; |
| |
| if(first == this) |
| first = next; |
| if(last == this) |
| last = prev; |
| } |
| |
| void DSO::loader(const char *filename, bool flag) |
| { |
| #if defined(HAVE_MACH_DYLD) |
| NSObjectFileImage oImage; |
| NSSymbol sym = NULL; |
| void (*init)(void); |
| #endif |
| |
| id = strrchr(filename, '/'); |
| if(id) |
| ++id; |
| else |
| id = filename; |
| |
| next = prev = NULL; |
| |
| #if defined(WIN32) |
| hImage = LoadLibrary(filename); |
| err = "none"; |
| #elif defined(HAVE_MACH_DYLD) |
| err = "none"; |
| oModule = NULL; |
| |
| fprintf(stderr, "**** HERE %s\n", filename); |
| |
| switch(NSCreateObjectFileImageFromFile(filename, &oImage)) { |
| case NSObjectFileImageSuccess: |
| break; |
| default: |
| err = "unknown error"; |
| return; |
| } |
| if(flag) |
| oModule = NSLinkModule(oImage, filename, NSLINKMODULE_OPTION_BINDNOW | NSLINKMODULE_OPTION_RETURN_ON_ERROR); |
| else |
| oModule = NSLinkModule(oImage, filename, NSLINKMODULE_OPTION_RETURN_ON_ERROR); |
| NSDestroyObjectFileImage(oImage); |
| if(oModule != NULL) |
| sym = NSLookupSymbolInModule(oModule, "__init"); |
| if(sym) { |
| init = (void (*)(void))NSAddressOfSymbol(sym); |
| init(); |
| } |
| |
| #elif defined(HAVE_SHL_LOAD) |
| err = "none"; |
| if(flag) |
| image = shl_load(filename, BIND_IMMEDIATE, 0L); |
| else |
| image = shl_load(filename, BIND_DEFERRED, 0L); |
| #else |
| if(flag) |
| image = dlopen(filename, RTLD_NOW | RTLD_GLOBAL); |
| else |
| image = dlopen(filename, RTLD_LAZY | RTLD_GLOBAL); |
| |
| #endif |
| |
| #if defined(WIN32) |
| if(!hImage) { |
| err = "load failed"; |
| #elif defined(HAVE_MACH_DYLD) |
| if(oModule == NULL) { |
| err = "load failed"; |
| #elif defined(HAVE_SHL_LOAD) |
| if(!image) { |
| err = "load failed"; |
| #else |
| if(!image) { |
| err = dlerror(); |
| #endif |
| |
| // since generally failure to map or load a plugin is fatel in most |
| // cases, we should generally log the error to syslog as well as notify |
| // the upper level system of the failure through exception. |
| |
| slog.error() << "dso: " << id << ": " << err << std::endl; |
| |
| #ifdef CCXX_EXCEPTIONS |
| if(Thread::getException() == Thread::throwObject) |
| throw(this); |
| #ifdef COMMON_STD_EXCEPTION |
| else if(Thread::getException() == Thread::throwException) |
| throw(DSOException(String(id) + err)); |
| #endif |
| #endif |
| return; |
| } |
| |
| if(!last) { |
| last = first = this; |
| return; |
| } |
| |
| mutex.enterMutex(); |
| last->next = this; |
| prev = last; |
| last = this; |
| mutex.leaveMutex(); |
| } |
| |
| DSO *DSO::getObject(const char *id) |
| { |
| const char *chk = strrchr(id, '/'); |
| DSO *dso; |
| |
| if(chk) |
| ++chk; |
| else |
| chk = id; |
| |
| mutex.enterMutex(); |
| dso = first; |
| while(dso) { |
| if(!stricmp(dso->id, chk)) |
| break; |
| dso = dso->next; |
| } |
| mutex.leaveMutex(); |
| return dso; |
| } |
| |
| bool DSO::isValid(void) |
| { |
| #if defined(WIN32) |
| if(!hImage) |
| #elif defined(HAVE_MACH_DYLD) |
| if(oModule == NULL) |
| #else |
| if(!image) |
| #endif |
| return false; |
| |
| return true; |
| } |
| |
| void *DSO::operator[](const char *sym) |
| { |
| #if defined(HAVE_SHL_LOAD) |
| int value; |
| shl_t handle = (shl_t)image; |
| |
| if(shl_findsym(&handle, sym, 0, &value) == 0) |
| return (void *)value; |
| else |
| return NULL; |
| #elif defined(HAVE_MACH_DYLD) |
| NSSymbol oSymbol = NSLookupSymbolInModule(oModule, sym); |
| if(oSymbol) |
| return NSAddressOfSymbol(oSymbol); |
| else |
| return NULL; |
| #elif defined(WIN32) |
| void *addr = (void *)GetProcAddress(hImage, sym); |
| if(!addr) |
| err = "symbol missing"; |
| |
| return addr; |
| #else |
| return dlsym(image, (char *)sym); |
| #endif |
| } |
| |
| #endif |
| |
| |
| #ifdef HAVE_MACH_DYLD |
| static void MyLinkError(NSLinkEditErrors c, int errorNumber, const char *filename, const char *errstr) |
| { |
| slog.error() << "dyld: " << filename << ": " << errstr << std::endl; |
| } |
| |
| static void MyUndefined(const char *symname) |
| { |
| slog.error() << "dyld: undefined: " << symname << std::endl; |
| } |
| |
| static NSModule MyMultiple(NSSymbol s, NSModule oMod, NSModule nMod) |
| { |
| slog.error() << "dyld: multiply defined symbols" << std::endl; |
| } |
| |
| void DSO::setDebug(void) |
| { |
| static NSLinkEditErrorHandlers handlers = { |
| &MyUndefined, |
| &MyMultiple, |
| &MyLinkError}; |
| |
| NSInstallLinkEditErrorHandlers(&handlers); |
| } |
| |
| #else |
| |
| void DSO::setDebug(void) |
| { |
| } |
| |
| #endif |
| |
| #ifdef CCXX_NAMESPACES |
| } |
| #endif |
| |
| |
| /** EMACS ** |
| * Local variables: |
| * mode: c++ |
| * c-basic-offset: 4 |
| * End: |
| */ |