lok: allow libraries to pre-init themselves.

Populate static module references before entering a jail
containing no code.

Implement for scfilt, scui, swui, sdui.

Change-Id: I8fec2aa78e67053a7945926c818122bd4290103c
Reviewed-on: https://gerrit.libreoffice.org/49545
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/cppuhelper/source/servicemanager.cxx b/cppuhelper/source/servicemanager.cxx
index d51ce6bd6292..014b8ea91817 100644
--- a/cppuhelper/source/servicemanager.cxx
+++ b/cppuhelper/source/servicemanager.cxx
@@ -1974,6 +1974,19 @@ void cppuhelper::ServiceManager::preloadImplementations() {
                 iterator->second->status = Data::Implementation::STATUS_LOADED;
 
             }
+
+            // Some libraries use other (non-UNO) libraries requiring preinit
+            oslGenericFunction fpPreload = aModule.getFunctionSymbol( "lok_preload_hook" );
+            if (fpPreload)
+            {
+                static std::vector<oslGenericFunction> aPreloaded;
+                if (std::find(aPreloaded.begin(), aPreloaded.end(), fpPreload) == aPreloaded.end())
+                {
+                    aPreloaded.push_back(fpPreload);
+                    fpPreload();
+                }
+            }
+
             // leak aModule
             aModule.release();
         }