xbmc/cores/DllLoader/SoLoader.cpp

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "SoLoader.h"
  10
  11 #include "filesystem/SpecialProtocol.h"
  12 #include "utils/log.h"
  13
  14 #include <dlfcn.h>
  15
  16 SoLoader::SoLoader(const std::string &so, bool bGlobal) : LibraryLoader(so)
  17 {
  18   m_soHandle = NULL;
  19   m_bGlobal = bGlobal;
  20   m_bLoaded = false;
  21 }
  22
  23 SoLoader::~SoLoader()
  24 {
  25   if (m_bLoaded)
  26     Unload();
  27 }
  28
  29 bool SoLoader::Load()
  30 {
  31   if (m_soHandle != NULL)
  32     return true;
  33
  34   std::string strFileName= CSpecialProtocol::TranslatePath(GetFileName());
  35   if (strFileName == "xbmc.so")
  36   {
  37     CLog::Log(LOGDEBUG, "Loading Internal Library");
  38     m_soHandle = RTLD_DEFAULT;
  39   }
  40   else
  41   {
  42     CLog::Log(LOGDEBUG, "Loading: {}", strFileName);
  43     int flags = RTLD_LAZY;
  44     m_soHandle = dlopen(strFileName.c_str(), flags);
  45     if (!m_soHandle)
  46     {
  47       CLog::Log(LOGERROR, "Unable to load {}, reason: {}", strFileName, dlerror());
  48       return false;
  49     }
  50   }
  51   m_bLoaded = true;
  52   return true;
  53 }
  54
  55 void SoLoader::Unload()
  56 {
  57
  58   if (m_soHandle)
  59   {
  60     if (dlclose(m_soHandle) != 0)
  61       CLog::Log(LOGERROR, "Unable to unload {}, reason: {}", GetName(), dlerror());
  62   }
  63   m_bLoaded = false;
  64   m_soHandle = NULL;
  65 }
  66
  67 int SoLoader::ResolveExport(const char* symbol, void** f, bool logging)
  68 {
  69   if (!m_bLoaded && !Load())
  70   {
  71     if (logging)
  72       CLog::Log(LOGWARNING, "Unable to resolve: {} {}, reason: so not loaded", GetName(), symbol);
  73     return 0;
  74   }
  75
  76   void* s = dlsym(m_soHandle, symbol);
  77   if (!s)
  78   {
  79     if (logging)
  80       CLog::Log(LOGWARNING, "Unable to resolve: {} {}, reason: {}", GetName(), symbol, dlerror());
  81     return 0;
  82   }
  83
  84   *f = s;
  85   return 1;
  86 }
  87
  88 bool SoLoader::IsSystemDll()
  89 {
  90   return false;
  91 }
  92
  93 HMODULE SoLoader::GetHModule()
  94 {
  95   return m_soHandle;
  96 }
  97
  98 bool SoLoader::HasSymbols()
  99 {
 100   return false;
 101 }