LXR linux/kernel/gcov/gcov.h

   1/*
   2 *  Profiling infrastructure declarations.
   3 *
   4 *  This file is based on gcc-internal definitions. Data structures are
   5 *  defined to be compatible with gcc counterparts. For a better
   6 *  understanding, refer to gcc source: gcc/gcov-io.h.
   7 *
   8 *    Copyright IBM Corp. 2009
   9 *    Author(s): Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
  10 *
  11 *    Uses gcc-internal data definitions.
  12 */
  13
  14#ifndef GCOV_H
  15#define GCOV_H GCOV_H
  16
  17#include <linux/types.h>
  18
  19/*
  20 * Profiling data types used for gcc 3.4 and above - these are defined by
  21 * gcc and need to be kept as close to the original definition as possible to
  22 * remain compatible.
  23 */
  24#define GCOV_DATA_MAGIC         ((unsigned int) 0x67636461)
  25#define GCOV_TAG_FUNCTION       ((unsigned int) 0x01000000)
  26#define GCOV_TAG_COUNTER_BASE   ((unsigned int) 0x01a10000)
  27#define GCOV_TAG_FOR_COUNTER(count)                                     \
  28        (GCOV_TAG_COUNTER_BASE + ((unsigned int) (count) << 17))
  29
  30#if BITS_PER_LONG >= 64
  31typedef long gcov_type;
  32#else
  33typedef long long gcov_type;
  34#endif
  35
  36/* Opaque gcov_info. The gcov structures can change as for example in gcc 4.7 so
  37 * we cannot use full definition here and they need to be placed in gcc specific
  38 * implementation of gcov. This also means no direct access to the members in
  39 * generic code and usage of the interface below.*/
  40struct gcov_info;
  41
  42/* Interface to access gcov_info data  */
  43const char *gcov_info_filename(struct gcov_info *info);
  44unsigned int gcov_info_version(struct gcov_info *info);
  45struct gcov_info *gcov_info_next(struct gcov_info *info);
  46void gcov_info_link(struct gcov_info *info);
  47void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info);
  48
  49/* Base interface. */
  50enum gcov_action {
  51        GCOV_ADD,
  52        GCOV_REMOVE,
  53};
  54
  55void gcov_event(enum gcov_action action, struct gcov_info *info);
  56void gcov_enable_events(void);
  57
  58/* Iterator control. */
  59struct seq_file;
  60struct gcov_iterator;
  61
  62struct gcov_iterator *gcov_iter_new(struct gcov_info *info);
  63void gcov_iter_free(struct gcov_iterator *iter);
  64void gcov_iter_start(struct gcov_iterator *iter);
  65int gcov_iter_next(struct gcov_iterator *iter);
  66int gcov_iter_write(struct gcov_iterator *iter, struct seq_file *seq);
  67struct gcov_info *gcov_iter_get_info(struct gcov_iterator *iter);
  68
  69/* gcov_info control. */
  70void gcov_info_reset(struct gcov_info *info);
  71int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2);
  72void gcov_info_add(struct gcov_info *dest, struct gcov_info *source);
  73struct gcov_info *gcov_info_dup(struct gcov_info *info);
  74void gcov_info_free(struct gcov_info *info);
  75
  76struct gcov_link {
  77        enum {
  78                OBJ_TREE,
  79                SRC_TREE,
  80        } dir;
  81        const char *ext;
  82};
  83extern const struct gcov_link gcov_link[];
  84
  85#endif /* GCOV_H */
  86