tracing: constructor for sym map to initialize everything

trace/process.h

@@ -17,6 +17,8 @@ class sym_map {
     std::map<uint64_t, std::string> map;
     std::map<uint64_t, std::string> map_ins;
 
+    sym_map();
+
     void add_filter(const std::string &sym);
     void load_file(const char *path, uint64_t offset = 0);
 

trace/sym_map.cpp

@@ -3,6 +3,12 @@
 #include "parser.h"
 #include "process.h"
 
+
+sym_map::sym_map()
+    : filter_en(false), insmap_en(false)
+{
+}
+
 void sym_map::add_filter(const std::string &sym)
 {
     filter_en = true;