1 #ifndef _PERF_BRANCH_H
2 #define _PERF_BRANCH_H 1
3 /*
4 * The linux/stddef.h isn't need here, but is needed for __always_inline used
5 * in files included from uapi/linux/perf_event.h such as
6 * /usr/include/linux/swab.h and /usr/include/linux/byteorder/little_endian.h,
7 * detected in at least musl libc, used in Alpine Linux. -acme
8 */
9 #include <stdio.h>
10 #include <stdint.h>
11 #include <linux/compiler.h>
12 #include <linux/stddef.h>
13 #include <linux/perf_event.h>
14 #include <linux/types.h>
15 #include "event.h"
16
17 struct branch_flags {
18 union {
19 u64 value;
20 struct {
21 u64 mispred:1;
22 u64 predicted:1;
23 u64 in_tx:1;
24 u64 abort:1;
25 u64 cycles:16;
26 u64 type:4;
27 u64 reserved:40;
28 };
29 };
30 };
31
32 struct branch_info {
33 struct addr_map_symbol from;
34 struct addr_map_symbol to;
35 struct branch_flags flags;
36 char *srcline_from;
37 char *srcline_to;
38 };
39
40 struct branch_entry {
41 u64 from;
42 u64 to;
43 struct branch_flags flags;
44 };
45
46 struct branch_stack {
47 u64 nr;
48 u64 hw_idx;
49 struct branch_entry entries[];
50 };
51
52 /*
53 * The hw_idx is only available when PERF_SAMPLE_BRANCH_HW_INDEX is applied.
54 * Otherwise, the output format of a sample with branch stack is
55 * struct branch_stack {
56 * u64 nr;
57 * struct branch_entry entries[0];
58 * }
59 * Check whether the hw_idx is available,
60 * and return the corresponding pointer of entries[0].
61 */
perf_sample__branch_entries(struct perf_sample * sample)62 static inline struct branch_entry *perf_sample__branch_entries(struct perf_sample *sample)
63 {
64 u64 *entry = (u64 *)sample->branch_stack;
65
66 entry++;
67 if (sample->no_hw_idx)
68 return (struct branch_entry *)entry;
69 return (struct branch_entry *)(++entry);
70 }
71
72 struct branch_type_stat {
73 bool branch_to;
74 u64 counts[PERF_BR_MAX];
75 u64 cond_fwd;
76 u64 cond_bwd;
77 u64 cross_4k;
78 u64 cross_2m;
79 };
80
81 void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags,
82 u64 from, u64 to);
83
84 const char *branch_type_name(int type);
85 void branch_type_stat_display(FILE *fp, struct branch_type_stat *st);
86 int branch_type_str(struct branch_type_stat *st, char *bf, int bfsize);
87
88 #endif /* _PERF_BRANCH_H */
89