utils: disable object validity check in release builds

CMakeLists.txt

@@ -410,6 +410,15 @@ set(SDL_TESTS_TIMEOUT_MULTIPLIER "1" CACHE STRING "Timeout multiplier to account
 set_option(SDL_EXAMPLES           "Build the examples directory")
 dep_option(SDL_EXAMPLES_LINK_SHARED "link examples to shared SDL library" "${SDL_SHARED}" "SDL_SHARED;SDL_STATIC" "${SDL_SHARED}")
 
+if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+  set(SDL_OBJECT_VALIDITY_CHECK_DEFAULT ON)
+else()
+  set(SDL_OBJECT_VALIDITY_CHECK_DEFAULT OFF)
+endif()
+
+set_option(SDL_OBJECT_VALIDITY_CHECK "Enable object validity check" ${SDL_OBJECT_VALIDITY_CHECK_DEFAULT})
+set(HAVE_OBJECT_VALIDITY_CHECK ${SDL_OBJECT_VALIDITY_CHECK})
+
 if(VITA)
   set_option(VIDEO_VITA_PIB  "Build with PSVita piglet gles2 support" OFF)
   set_option(VIDEO_VITA_PVR  "Build with PSVita PVR gles/gles2 support" OFF)

include/build_config/SDL_build_config.h.cmake

@@ -550,6 +550,9 @@
 #cmakedefine SDL_DISABLE_WINDOWS_IME 1
 #cmakedefine SDL_GDK_TEXTINPUT 1
 
+/* Enable object validity check */
+#cmakedefine SDL_OBJECT_VALIDITY_CHECK
+
 /* Platform specific definitions */
 #cmakedefine SDL_IPHONE_KEYBOARD 1
 #cmakedefine SDL_IPHONE_LAUNCHSCREEN 1

src/SDL_utils.c

@@ -150,6 +150,7 @@ static bool SDL_KeyMatchObject(void *unused, const void *a, const void *b)
 
 void SDL_SetObjectValid(void *object, SDL_ObjectType type, bool valid)
 {
+#ifdef SDL_OBJECT_VALIDITY_CHECK
     SDL_assert(object != NULL);
 
     if (SDL_ShouldInit(&SDL_objects_init)) {
@@ -166,6 +167,7 @@ void SDL_SetObjectValid(void *object, SDL_ObjectType type, bool valid)
     } else {
         SDL_RemoveFromHashTable(SDL_objects, object);
     }
+#endif
 }
 
 bool SDL_ObjectValid(void *object, SDL_ObjectType type)
@@ -174,12 +176,15 @@ bool SDL_ObjectValid(void *object, SDL_ObjectType type)
         return false;
     }
 
+#ifdef SDL_OBJECT_VALIDITY_CHECK
     const void *object_type;
     if (!SDL_FindInHashTable(SDL_objects, object, &object_type)) {
         return false;
     }
-
     return (((SDL_ObjectType)(uintptr_t)object_type) == type);
+#else
+    return true;
+#endif
 }
 
 typedef struct GetOneObjectData