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
  31 typedef long gcov_type;
  32 #else
  33 typedef 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.*/
  40 struct gcov_info;
  41
  42 /* Interface to access gcov_info data  */
  43 const char *gcov_info_filename(struct gcov_info *info);
  44 unsigned int gcov_info_version(struct gcov_info *info);
  45 struct gcov_info *gcov_info_next(struct gcov_info *info);
  46 void gcov_info_link(struct gcov_info *info);
  47 void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info);
  48
  49 /* Base interface. */
  50 enum gcov_action {
  51         GCOV_ADD,
  52         GCOV_REMOVE,
  53 };
  54
  55 void gcov_event(enum gcov_action action, struct gcov_info *info);
  56 void gcov_enable_events(void);
  57
  58 /* Iterator control. */
  59 struct seq_file;
  60 struct gcov_iterator;
  61
  62 struct gcov_iterator *gcov_iter_new(struct gcov_info *info);
  63 void gcov_iter_free(struct gcov_iterator *iter);
  64 void gcov_iter_start(struct gcov_iterator *iter);
  65 int gcov_iter_next(struct gcov_iterator *iter);
  66 int gcov_iter_write(struct gcov_iterator *iter, struct seq_file *seq);
  67 struct gcov_info *gcov_iter_get_info(struct gcov_iterator *iter);
  68
  69 /* gcov_info control. */
  70 void gcov_info_reset(struct gcov_info *info);
  71 int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2);
  72 void gcov_info_add(struct gcov_info *dest, struct gcov_info *source);
  73 struct gcov_info *gcov_info_dup(struct gcov_info *info);
  74 void gcov_info_free(struct gcov_info *info);
  75
  76 struct gcov_link {
  77         enum {
  78                 OBJ_TREE,
  79                 SRC_TREE,
  80         } dir;
  81         const char *ext;
  82 };
  83 extern const struct gcov_link gcov_link[];
  84
  85 #endif /* GCOV_H */