From 61fdc3c23af1c842da8cd66673d5ce0ad5f1c6cf Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <mailroxas@gmail.com>
Date: Tue, 27 Feb 2018 13:41:40 +0200
Subject: wrapper: Don't wrap NULL functions

---
 src/wrapper/verbose.h | 13 ++++++++-----
 src/wrapper/wrapper.c |  5 +++++
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/src/wrapper/verbose.h b/src/wrapper/verbose.h
index 06ee681..00f72a0 100644
--- a/src/wrapper/verbose.h
+++ b/src/wrapper/verbose.h
@@ -1,11 +1,11 @@
 #pragma once
 
-#ifdef VERBOSE_FUNCTIONS
-#  include <stdio.h>
-#  include <stdarg.h>
-#  include <pthread.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <pthread.h>
+
 static void
-verbose(const char *fmt, ...)
+verbose_log(const char *fmt, ...)
 {
    static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
    pthread_mutex_lock(&mutex);
@@ -17,6 +17,9 @@ verbose(const char *fmt, ...)
    fputc('\n', stderr);
    pthread_mutex_unlock(&mutex);
 }
+
+#ifdef VERBOSE_FUNCTIONS
+#  define verbose verbose_log
 #else
 #  define verbose(...)
 #endif
diff --git a/src/wrapper/wrapper.c b/src/wrapper/wrapper.c
index 44e0802..d7feff5 100644
--- a/src/wrapper/wrapper.c
+++ b/src/wrapper/wrapper.c
@@ -61,6 +61,11 @@ wrapper_create(const char *const symbol, void *function)
 {
     assert(symbol);
 
+    if (!function) {
+        verbose_log("FIXME: unimplemented symbol: %s", symbol);
+        return NULL;
+    }
+
 #ifdef WRAPPER_TRACE
     if (!__cxa_demangle.ptr)
         __cxa_demangle.ptr = dlsym(RTLD_DEFAULT, "__cxa_demangle");
-- 
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