Fix: trace events in C constructors/destructors
[lttng-ust.git] / include / lttng / ust-compiler.h
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1#ifndef _LTTNG_UST_COMPILER_H
2#define _LTTNG_UST_COMPILER_H
3
4/*
5 * Copyright 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
6 * Paul Woegerer <paul_woegerer@mentor.com>
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
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17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
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25 */
26
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27/*
28 * By default, LTTng-UST uses the priority 150 for the tracepoint and probe
29 * provider constructors to trace tracepoints located within
30 * constructors/destructors with a higher priority value within the same
31 * module. This priority can be overridden by the application.
32 */
33#ifndef LTTNG_UST_CONSTRUCTOR_PRIO
34#define LTTNG_UST_CONSTRUCTOR_PRIO 150
35#endif
36
a8909ba5 37#define lttng_ust_notrace __attribute__((no_instrument_function))
b3f60bbf 38#define LTTNG_PACKED __attribute__((__packed__))
a8909ba5 39
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40/*
41 * Clang supports the no_sanitize variable attribute on global variables.
42 * GCC only supports the no_sanitize_address function attribute, which is
43 * not what we need.
44 */
45#if defined(__clang__)
46# if __has_feature(address_sanitizer)
47# define __lttng_ust_variable_attribute_no_sanitize_address \
48 __attribute__((no_sanitize("address")))
49# else
50# define __lttng_ust_variable_attribute_no_sanitize_address
51# endif
52#else
53# define __lttng_ust_variable_attribute_no_sanitize_address
54#endif
55
a8909ba5 56#endif /* _LTTNG_UST_COMPILER_H */
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