projects / lttng-ust.git / blame
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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 */ |