Fix: lttng: uninitialized pointer free'd when no sessiond is present

[lttng-tools.git] / src / common / buffer-view.h

diff --git a/src/common/buffer-view.h b/src/common/buffer-view.h
index 7d03b41dd1bb80ece8ad109ddd8e40a898e37921..e8c351b3f994974a847bf4936812ad073b445ef4 100644 (file)
--- a/src/common/buffer-view.h
+++ b/src/common/buffer-view.h
@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License, version 2.1 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: LGPL-2.1-only
  *
- * This program 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 program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #ifndef LTTNG_BUFFER_VIEW_H
@@ -20,6 +10,7 @@
 
 #include <stddef.h>
 #include <stdint.h>
+#include <common/macros.h>
 
 struct lttng_dynamic_buffer;
 
@@ -28,6 +19,21 @@ struct lttng_buffer_view {
        size_t size;
 };
 
+/**
+ * Return a buffer view referencing a subset of the memory referenced by a raw
+ * pointer.
+ *
+ * @src                Source buffer to reference
+ * @offset     Offset to apply to the source memory buffer
+ * @len                Length of the memory contents to reference.
+ *
+ * Note that a buffer view never assumes the ownership of the memory it
+ * references.
+ */
+LTTNG_HIDDEN
+struct lttng_buffer_view lttng_buffer_view_init(
+               const char *src, size_t offset, ptrdiff_t len);
+
 /**
  * Return a buffer view referencing a subset of the memory referenced by another
  * view.
@@ -41,6 +47,7 @@ struct lttng_buffer_view {
  * Note that a buffer view never assumes the ownership of the memory it
  * references.
  */
+LTTNG_HIDDEN
 struct lttng_buffer_view lttng_buffer_view_from_view(
                const struct lttng_buffer_view *src, size_t offset,
                ptrdiff_t len);
@@ -58,6 +65,7 @@ struct lttng_buffer_view lttng_buffer_view_from_view(
  * Note that a buffer view never assumes the ownership of the memory it
  * references.
  */
+LTTNG_HIDDEN
 struct lttng_buffer_view lttng_buffer_view_from_dynamic_buffer(
                const struct lttng_dynamic_buffer *src, size_t offset,
                ptrdiff_t len);