hashtable: silence -fsanitize=address warning for `hashlittle()` function

[lttng-tools.git] / src / common / macros.h

diff --git a/src/common/macros.h b/src/common/macros.h
index f242da481b6f8c7c47ddf30064894b3ef35564e8..e28250f7ed20a7892600c161f6b0921ff10424d3 100644 (file)
--- a/src/common/macros.h
+++ b/src/common/macros.h
@@ -1,19 +1,9 @@
 /*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-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 General Public License for
- * more details.
- *
- * You should have received a copy of the GNU 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 _MACROS_H
@@ -87,6 +77,16 @@ void *zmalloc(size_t len)
 #define LTTNG_PACKED __attribute__((__packed__))
 #endif
 
+#ifndef LTTNG_NO_SANITIZE_ADDRESS
+#if defined(__clang__) || defined (__GNUC__)
+#define LTTNG_NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address))
+#else
+#define LTTNG_NO_SANITIZE_ADDRESS
+#endif
+#endif
+
+#define is_signed(type) (((type) (-1)) < 0)
+
 /*
  * Align value to the next multiple of align. Returns val if it already is a
  * multiple of align. Align must be a power of two.
@@ -108,6 +108,13 @@ void *zmalloc(size_t len)
 
 #define ASSERT_LOCKED(lock) assert(pthread_mutex_trylock(&lock))
 
+/*
+ * Get an aligned pointer to a value. This is meant
+ * as a helper to pass an aligned pointer to a member in a packed structure
+ * to a function.
+ */
+#define ALIGNED_CONST_PTR(value) (((const typeof(value) []) { value }))
+
 /*
  * lttng_strncpy returns 0 on success, or nonzero on failure.
  * It checks that the @src string fits into @dst_len before performing