3 files changed, 136 insertions, 9 deletions
diff --git a/indra/media_plugins/base/CMakeLists.txt b/indra/media_plugins/base/CMakeLists.txt
index 64b6a4228d..5e635c6ca3 100644
--- a/indra/media_plugins/base/CMakeLists.txt
+++ b/indra/media_plugins/base/CMakeLists.txt
@@ -12,13 +12,6 @@ include(PluginAPI)
 
 ### media_plugin_base
 
-if(NOT ADDRESS_SIZE EQUAL 32)
-  if(WINDOWS)
-    ##add_definitions(/FIXED:NO)
-  else(WINDOWS) # not windows therefore gcc LINUX and DARWIN
-    add_definitions(-fPIC)
-  endif(WINDOWS)
-endif(NOT ADDRESS_SIZE EQUAL 32)
 
 set(media_plugin_base_SOURCE_FILES
     media_plugin_base.cpp
diff --git a/indra/media_plugins/base/media_plugin_base.cpp b/indra/media_plugins/base/media_plugin_base.cpp
index 545eee25a9..b21f29ac32 100644
--- a/indra/media_plugins/base/media_plugin_base.cpp
+++ b/indra/media_plugins/base/media_plugin_base.cpp
@@ -167,6 +167,56 @@ void MediaPluginBase::sendStatus()
     sendMessage(message);
 }
 
+#if LL_LINUX
+
+size_t SymbolGrabber::registerSymbol( SymbolToGrab aSymbol )
+{
+    gSymbolsToGrab.emplace_back(aSymbol);
+    return gSymbolsToGrab.size();
+}
+
+bool SymbolGrabber::grabSymbols(std::vector< std::string > const &aDSONames)
+{
+    std::cerr << "SYMBOLS: " << gSymbolsToGrab.size() << std::endl;
+
+    if (sSymsGrabbed)
+        return true;
+
+    //attempt to load the shared libraries
+    apr_pool_create(&sSymDSOMemoryPool, nullptr);
+
+    for( std::vector< std::string >::const_iterator itr = aDSONames.begin(); itr != aDSONames.end(); ++itr )
+    {
+        apr_dso_handle_t *pDSO(NULL);
+        std::string strDSO{ *itr };
+        if( APR_SUCCESS == apr_dso_load( &pDSO, strDSO.c_str(), sSymDSOMemoryPool ))
+            sLoadedLibraries.push_back( pDSO );
+
+        for( auto i = 0; i < gSymbolsToGrab.size(); ++i )
+        {
+            if( !*gSymbolsToGrab[i].mPPFunc )
+                apr_dso_sym( gSymbolsToGrab[i].mPPFunc, pDSO, gSymbolsToGrab[i].mName );
+        }
+    }
+
+    bool sym_error = false;
+
+    for( auto i = 0; i < gSymbolsToGrab.size(); ++i )
+    {
+        if( gSymbolsToGrab[ i ].mRequired && ! *gSymbolsToGrab[ i ].mPPFunc )
+            sym_error = true;
+    }
+
+    sSymsGrabbed = !sym_error;
+    return sSymsGrabbed;
+}
+
+void SymbolGrabber::ungrabSymbols()
+{
+
+}
+#endif
+
 
 #if LL_WINDOWS
 # define LLSYMEXPORT __declspec(dllexport)
@@ -204,3 +254,50 @@ int WINAPI DllEntryPoint( HINSTANCE hInstance, unsigned long reason, void* param
     return 1;
 }
 #endif
+
+#if LL_LINUX
+pid_t getParentPid( pid_t aPid )
+{
+    std::stringstream strm;
+    strm << "/proc/" << aPid << "/status";
+    std::ifstream in{ strm.str() };
+
+    if( !in.is_open() )
+        return 0;
+
+    pid_t res {0};
+    while( !in.eof() && res == 0 )
+    {
+        std::string line;
+        line.resize( 1024, 0 );
+        in.getline( &line[0], line.length() );	
+
+        auto i = line.find( "PPid:"  );
+        
+        if( i == std::string::npos )
+            continue;
+        
+        char const *pIn = line.c_str() + 5; // Skip over pid;
+        while( *pIn != 0 && isspace( *pIn ) )
+               ++pIn;
+
+        if( *pIn )
+            res = atoll( pIn );
+    }
+     return res;
+}
+
+bool isPluginPid( pid_t aPid )
+{
+    auto myPid = getpid();
+
+    do
+    {
+        if( aPid == myPid )
+            return true;
+        aPid = getParentPid( aPid );
+    } while( aPid > 1 );
+
+    return false;
+}
+#endif
diff --git a/indra/media_plugins/base/media_plugin_base.h b/indra/media_plugins/base/media_plugin_base.h
index f65c712a66..a084fc9834 100644
--- a/indra/media_plugins/base/media_plugin_base.h
+++ b/indra/media_plugins/base/media_plugin_base.h
@@ -32,6 +32,41 @@
 #include "llpluginmessage.h"
 #include "llpluginmessageclasses.h"
 
+#if LL_LINUX
+
+struct SymbolToGrab
+{
+    bool mRequired;
+    char const *mName;
+    apr_dso_handle_sym_t *mPPFunc;
+};
+
+class SymbolGrabber
+{
+public:
+    size_t registerSymbol( SymbolToGrab aSymbol );
+    bool grabSymbols(std::vector< std::string > const &aDSONames);
+    void ungrabSymbols();
+
+private:
+    std::vector< SymbolToGrab > gSymbolsToGrab;
+
+    bool sSymsGrabbed = false;
+    apr_pool_t *sSymDSOMemoryPool = nullptr;
+    std::vector<apr_dso_handle_t *> sLoadedLibraries;
+};
+
+extern SymbolGrabber gSymbolGrabber;
+
+// extern SymbolGrabber gSymbolGrabber;
+
+#define LL_GRAB_SYM(SYMBOL_GRABBER, REQUIRED, SYMBOL_NAME, RETURN, ...) \
+    RETURN (*ll##SYMBOL_NAME)(__VA_ARGS__) = nullptr; \
+    size_t gRegistered##SYMBOL_NAME = SYMBOL_GRABBER.registerSymbol( \
+        { REQUIRED, #SYMBOL_NAME , (apr_dso_handle_sym_t*)&ll##SYMBOL_NAME} \
+    );
+
+#endif
 
 class MediaPluginBase
 {
@@ -46,7 +81,6 @@ public:
     static void staticReceiveMessage(const char *message_string, void **user_data);
 
 protected:
-
    /** Plugin status. */
     typedef enum
     {
@@ -126,4 +160,7 @@ int init_media_plugin(
     LLPluginInstance::sendMessageFunction *plugin_send_func,
     void **plugin_user_data);
 
-
+#if LL_LINUX
+pid_t getParentPid(pid_t aPid);
+bool isPluginPid(pid_t aPid);
+#endif