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a8909ba5 PW |
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. | |
d2428e87 MD |
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. | |
a8909ba5 PW |
25 | */ |
26 | ||
27 | #define lttng_ust_notrace __attribute__((no_instrument_function)) | |
b3f60bbf | 28 | #define LTTNG_PACKED __attribute__((__packed__)) |
a8909ba5 | 29 | |
4f74bc5e MD |
30 | /* |
31 | * Clang supports the no_sanitize variable attribute on global variables. | |
32 | * GCC only supports the no_sanitize_address function attribute, which is | |
33 | * not what we need. | |
34 | */ | |
35 | #if defined(__clang__) | |
36 | # if __has_feature(address_sanitizer) | |
37 | # define __lttng_ust_variable_attribute_no_sanitize_address \ | |
38 | __attribute__((no_sanitize("address"))) | |
39 | # else | |
40 | # define __lttng_ust_variable_attribute_no_sanitize_address | |
41 | # endif | |
42 | #else | |
43 | # define __lttng_ust_variable_attribute_no_sanitize_address | |
44 | #endif | |
45 | ||
e1904921 MD |
46 | /* |
47 | * g++ 4.8 and prior do not support C99 compound literals. Therefore, | |
48 | * force allocating those on the heap with these C++ compilers. | |
49 | */ | |
50 | #if defined (__cplusplus) && defined (__GNUC__) && \ | |
51 | (__GNUC__ < 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ <= 8)) | |
52 | # ifndef LTTNG_ALLOCATE_COMPOUND_LITERAL_ON_HEAP | |
53 | # define LTTNG_ALLOCATE_COMPOUND_LITERAL_ON_HEAP | |
54 | # endif | |
55 | #endif | |
56 | ||
7edfc172 MD |
57 | /* |
58 | * Compound literals with static storage are needed by LTTng. | |
59 | * Compound literals are part of the C99 and C11 standards, but not | |
60 | * part of the C++ standards. However, those are supported by both g++ and | |
61 | * clang. In order to be strictly C++11 compliant, defining | |
62 | * LTTNG_ALLOCATE_COMPOUND_LITERAL_ON_HEAP before including this header | |
63 | * allocates those on the heap in C++. | |
64 | * | |
65 | * Example use: | |
66 | * static struct mystruct *var = __LTTNG_COMPOUND_LITERAL(struct mystruct, { 1, 2, 3 }); | |
67 | */ | |
68 | #if defined (__cplusplus) && defined (LTTNG_ALLOCATE_COMPOUND_LITERAL_ON_HEAP) | |
69 | #define __LTTNG_COMPOUND_LITERAL(type, ...) new (type) __VA_ARGS__ | |
70 | #else | |
71 | #define __LTTNG_COMPOUND_LITERAL(type, ...) (type[]) { __VA_ARGS__ } | |
72 | #endif | |
73 | ||
a8909ba5 | 74 | #endif /* _LTTNG_UST_COMPILER_H */ |