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   1 #ifndef __PERF_HEADER_H
   2 #define __PERF_HEADER_H
   3
   4 #include "../../../include/linux/perf_event.h"
   5 #include <sys/types.h>
   6 #include <stdbool.h>
   7 #include "types.h"
   8
   9 #include <linux/bitmap.h>
  10
  11 struct perf_header_attr {
  12         struct perf_event_attr attr;
  13         int ids, size;
  14         u64 *id;
  15         off_t id_offset;
  16 };
  17
  18 enum {
  19         HEADER_TRACE_INFO = 1,
  20         HEADER_BUILD_ID,
  21         HEADER_LAST_FEATURE,
  22 };
  23
  24 #define HEADER_FEAT_BITS                        256
  25
  26 struct perf_file_section {
  27         u64 offset;
  28         u64 size;
  29 };
  30
  31 struct perf_file_header {
  32         u64                             magic;
  33         u64                             size;
  34         u64                             attr_size;
  35         struct perf_file_section        attrs;
  36         struct perf_file_section        data;
  37         struct perf_file_section        event_types;
  38         DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
  39 };
  40
  41 struct perf_header;
  42
  43 int perf_file_header__read(struct perf_file_header *self,
  44                            struct perf_header *ph, int fd);
  45
  46 struct perf_header {
  47         int                     frozen;
  48         int                     attrs, size;
  49         struct perf_header_attr **attr;
  50         s64                     attr_offset;
  51         u64                     data_offset;
  52         u64                     data_size;
  53         u64                     event_offset;
  54         u64                     event_size;
  55         DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
  56 };
  57
  58 int perf_header__init(struct perf_header *self);
  59 void perf_header__exit(struct perf_header *self);
  60
  61 int perf_header__read(struct perf_header *self, int fd);
  62 int perf_header__write(struct perf_header *self, int fd, bool at_exit);
  63
  64 int perf_header__add_attr(struct perf_header *self,
  65                           struct perf_header_attr *attr);
  66
  67 void perf_header__push_event(u64 id, const char *name);
  68 char *perf_header__find_event(u64 id);
  69
  70 struct perf_header_attr *perf_header_attr__new(struct perf_event_attr *attr);
  71 void perf_header_attr__delete(struct perf_header_attr *self);
  72
  73 int perf_header_attr__add_id(struct perf_header_attr *self, u64 id);
  74
  75 u64 perf_header__sample_type(struct perf_header *header);
  76 struct perf_event_attr *
  77 perf_header__find_attr(u64 id, struct perf_header *header);
  78 void perf_header__set_feat(struct perf_header *self, int feat);
  79 bool perf_header__has_feat(const struct perf_header *self, int feat);
  80
  81 int perf_header__process_sections(struct perf_header *self, int fd,
  82                                   int (*process)(struct perf_file_section *self,
  83                                                  int feat, int fd));
  84
  85 #endif /* __PERF_HEADER_H */