include/lttng/ust-compiler.h

   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.
  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.
  25  */
  26
  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
  37 #define lttng_ust_notrace __attribute__((no_instrument_function))
  38 #define LTTNG_PACKED    __attribute__((__packed__))
  39
  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
  56 #endif /* _LTTNG_UST_COMPILER_H */