Rename liblttng-ust-libc to liblttng-ust-libc-wrapper

[lttng-ust.git] / liblttng-ust-libc-wrapper / lttng-ust-malloc.c

diff --git a/liblttng-ust-libc-wrapper/lttng-ust-malloc.c b/liblttng-ust-libc-wrapper/lttng-ust-malloc.c
new file mode 100644 (file)
index 0000000..3212ff0
--- /dev/null
+++ b/liblttng-ust-libc-wrapper/lttng-ust-malloc.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2009  Pierre-Marc Fournier
+ * Copyright (C) 2011  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#define _GNU_SOURCE
+#include <dlfcn.h>
+#include <sys/types.h>
+#include <stdio.h>
+
+#define TRACEPOINT_DEFINE
+#define TRACEPOINT_CREATE_PROBES
+#include "ust_libc.h"
+
+void *malloc(size_t size)
+{
+       static void *(*plibc_malloc)(size_t size) = NULL;
+       void *retval;
+
+       if (plibc_malloc == NULL) {
+               plibc_malloc = dlsym(RTLD_NEXT, "malloc");
+               if (plibc_malloc == NULL) {
+                       fprintf(stderr, "mallocwrap: unable to find malloc\n");
+                       return NULL;
+               }
+       }
+       retval = plibc_malloc(size);
+       tracepoint(ust_libc, malloc, size, retval);
+       return retval;
+}
+
+void free(void *ptr)
+{
+       static void *(*plibc_free)(void *ptr) = NULL;
+
+       if (plibc_free == NULL) {
+               plibc_free = dlsym(RTLD_NEXT, "free");
+               if (plibc_free == NULL) {
+                       fprintf(stderr, "mallocwrap: unable to find free\n");
+                       return;
+               }
+       }
+       tracepoint(ust_libc, free, ptr);
+       plibc_free(ptr);
+}