include/lttng/ust-tracer.h

   1 // SPDX-FileCopyrightText: 2005-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   2 //
   3 // SPDX-License-Identifier: MIT
   4
   5 /*
   6  * This contains the core definitions for the Linux Trace Toolkit.
   7  */
   8
   9 #ifndef _LTTNG_UST_TRACER_H
  10 #define _LTTNG_UST_TRACER_H
  11
  12 #include <lttng/ust-arch.h>
  13 #include <lttng/ust-compiler.h>
  14 #include <lttng/ust-utils.h>
  15 #include <lttng/ust-version.h>
  16
  17 /*
  18  * On architectures without efficient unaligned accesses, the layout of
  19  * the ringbuffer's content respects the natural alignment of the
  20  * system. Only pack its content on architectures we know have efficient
  21  * unaligned memory access.
  22  *
  23  * Whether to pack the ring buffer contents or not is part of the ABI
  24  * between the probe providers and the tracer, and is selected by the
  25  * lttng/ust-arch.h header.
  26  */
  27 #ifndef LTTNG_UST_ARCH_HAS_EFFICIENT_UNALIGNED_ACCESS
  28 #define LTTNG_UST_RING_BUFFER_NATURAL_ALIGN
  29 #endif
  30
  31 #ifdef LTTNG_UST_RING_BUFFER_NATURAL_ALIGN
  32 #define lttng_ust_rb_alignof(type)      __alignof__(type)
  33 #else
  34 #define lttng_ust_rb_alignof(type)      1
  35 #endif
  36
  37 /*
  38  * Concatenate lttng ust shared libraries name with their major version number.
  39  */
  40 #define LTTNG_UST_LIB_SONAME "liblttng-ust.so." lttng_ust_stringify(LTTNG_UST_LIB_SONAME_MAJOR)
  41 #define LTTNG_UST_TRACEPOINT_LIB_SONAME "liblttng-ust-tracepoint.so." lttng_ust_stringify(LTTNG_UST_LIB_SONAME_MAJOR)
  42 #define LTTNG_UST_CTL_LIB_SONAME "liblttng-ust-ctl.so." lttng_ust_stringify(LTTNG_UST_CTL_LIB_SONAME_MAJOR)
  43
  44
  45 #endif /* _LTTNG_UST_TRACER_H */