trace: Free symbols on program exit

This makes valgrind memleak checks with CONFIG_WPA_TRACE=y somewhat
cleaner.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

src/utils/os_unix.c

@@ -372,6 +372,7 @@ void os_program_deinit(void)
 	if (total)
 		wpa_printf(MSG_INFO, "MEMLEAK: total %lu bytes",
 			   (unsigned long) total);
+	wpa_trace_deinit();
 #endif /* WPA_TRACE */
 }
 

src/utils/trace.c

@@ -366,4 +366,11 @@ void wpa_trace_check_ref(const void *addr)
 	}
 }
 
+
+void wpa_trace_deinit(void)
+{
+	free(syms);
+	syms = NULL;
+}
+
 #endif /* WPA_TRACE */

src/utils/trace.h

@@ -66,4 +66,6 @@ void wpa_trace_dump_funcname(const char *title, void *pc);
 
 #endif /* WPA_TRACE_BFD */
 
+void wpa_trace_deinit(void);
+
 #endif /* TRACE_H */