diff --git a/tools/perf/util/exec_cmd.c b/tools/perf/util/exec_cmd.c
index c1b3d34..67eeff5 100644
--- a/tools/perf/util/exec_cmd.c
+++ b/tools/perf/util/exec_cmd.c
@@ -53,8 +53,8 @@
 		slash--;
 
 	if (slash >= argv0) {
-		argv0_path = xstrndup(argv0, slash - argv0);
-		return slash + 1;
+		argv0_path = strndup(argv0, slash - argv0);
+		return argv0_path ? slash + 1 : NULL;
 	}
 
 	return argv0;
diff --git a/tools/perf/util/path.c b/tools/perf/util/path.c
index b276c18..58a470d 100644
--- a/tools/perf/util/path.c
+++ b/tools/perf/util/path.c
@@ -152,5 +152,5 @@
 
 	if (path_len && !is_dir_sep(path[path_len - 1]))
 		return NULL;
-	return xstrndup(path, chomp_trailing_dir_sep(path, path_len));
+	return strndup(path, chomp_trailing_dir_sep(path, path_len));
 }
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 52118a0..45b9655 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -179,16 +179,8 @@
  * Wrappers:
  */
 extern char *xstrdup(const char *str);
-extern void *xmalloc(size_t size) __attribute__((weak));
-extern char *xstrndup(const char *str, size_t len);
 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
 
-static inline void *xzalloc(size_t size)
-{
-	void *buf = xmalloc(size);
-
-	return memset(buf, 0, size);
-}
 
 static inline void *zalloc(size_t size)
 {
diff --git a/tools/perf/util/wrapper.c b/tools/perf/util/wrapper.c
index c4ced7c..73e900e 100644
--- a/tools/perf/util/wrapper.c
+++ b/tools/perf/util/wrapper.c
@@ -23,46 +23,6 @@
 	return ret;
 }
 
-void *xmalloc(size_t size)
-{
-	void *ret = malloc(size);
-	if (!ret && !size)
-		ret = malloc(1);
-	if (!ret) {
-		release_pack_memory(size, -1);
-		ret = malloc(size);
-		if (!ret && !size)
-			ret = malloc(1);
-		if (!ret)
-			die("Out of memory, malloc failed");
-	}
-#ifdef XMALLOC_POISON
-	memset(ret, 0xA5, size);
-#endif
-	return ret;
-}
-
-/*
- * xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of
- * "data" to the allocated memory, zero terminates the allocated memory,
- * and returns a pointer to the allocated memory. If the allocation fails,
- * the program dies.
- */
-static void *xmemdupz(const void *data, size_t len)
-{
-	char *p = xmalloc(len + 1);
-	memcpy(p, data, len);
-	p[len] = '\0';
-	return p;
-}
-
-char *xstrndup(const char *str, size_t len)
-{
-	char *p = memchr(str, '\0', len);
-
-	return xmemdupz(str, p ? (size_t)(p - str) : len);
-}
-
 void *xrealloc(void *ptr, size_t size)
 {
 	void *ret = realloc(ptr, size);