Fix bugs in loading plugin set

Fixes in the LoadPluginSet() function:
- the naming scheme for backend libraries is "libTYPE.so", where TYPE
  is the backend type (e.g. for tpk it should load libtpk.so)
- elements of the global plugin_set_list array should be allocated
  every time a new backend library is loaded as this behaviour is
  expected by the backend api: pkg_plugin_on_load() function expects
  its input parameter to be an already allocated memory area, otherwise
  it returns -1 and the LoadPluginSet() reports a failure:

    extern "C" int pkg_plugin_on_load(pkg_plugin_set* set) {
      if (set == nullptr)
        return -1;
      set->plugin_on_unload = PluginOnUnload;
      ...
    }

Change-Id: I603030871a28f050f1d87ce572c102c3d0b5dc90

1 files changed, 8 insertions, 1 deletions

diff --git a/client/src/internal.cc b/client/src/internal.cc
index a02ec3a..9fb08a9 100644
--- a/client/src/internal.cc
+++ b/client/src/internal.cc
@@ -74,7 +74,7 @@ pkg_plugin_set* LoadPluginSet(const std::string& type) {
     }
   }
 
-  std::string lib_path = kPkgLibPath + type + ".so";
+  std::string lib_path = kPkgLibPath + std::string("lib") + type + ".so";
   void* handle = dlopen(lib_path.c_str(), RTLD_LAZY);
   if (!handle) {
     _E("failed to load library %s", lib_path.c_str());
@@ -90,6 +90,13 @@ pkg_plugin_set* LoadPluginSet(const std::string& type) {
     return nullptr;
   }
 
+  plugin_set_list[i] = reinterpret_cast<pkg_plugin_set *>(calloc(1, sizeof(pkg_plugin_set)));
+  if (plugin_set_list[i] == NULL) {
+    _E("malloc of the plugin_set_list element is failed");
+    dlclose(handle);
+    return nullptr;
+  }
+
   if (on_load(plugin_set_list[i]) != 0) {
     _E("pkg_plugin_on_load failed");
     free(plugin_set_list[i]);