make module_cache a session field rather than plain static

diff --git a/session.h b/session.h
index d8d89091ec0b57831f7ac798eae7d4d65cceb721..734c8d7ddc861bb51f2c5b200da82780049990e9 100644 (file)
--- a/session.h
+++ b/session.h
@@ -165,8 +165,8 @@ struct systemtap_session
   Dwarf_Addr sym_stext;
 
   // List of libdwfl module names to extract symbol/unwind data for.
-  struct module_cache* module_cache;
   std::set<std::string> unwindsym_modules;
+  struct module_cache* module_cache;
 
   std::set<std::string> seen_errors;
   std::set<std::string> seen_warnings;