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2521f2c2 PO |
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_COUNTERS 5 | |
25 | #define GCOV_DATA_MAGIC ((unsigned int) 0x67636461) | |
26 | #define GCOV_TAG_FUNCTION ((unsigned int) 0x01000000) | |
27 | #define GCOV_TAG_COUNTER_BASE ((unsigned int) 0x01a10000) | |
28 | #define GCOV_TAG_FOR_COUNTER(count) \ | |
29 | (GCOV_TAG_COUNTER_BASE + ((unsigned int) (count) << 17)) | |
30 | ||
31 | #if BITS_PER_LONG >= 64 | |
32 | typedef long gcov_type; | |
33 | #else | |
34 | typedef long long gcov_type; | |
35 | #endif | |
36 | ||
37 | /** | |
38 | * struct gcov_fn_info - profiling meta data per function | |
39 | * @ident: object file-unique function identifier | |
40 | * @checksum: function checksum | |
41 | * @n_ctrs: number of values per counter type belonging to this function | |
42 | * | |
43 | * This data is generated by gcc during compilation and doesn't change | |
44 | * at run-time. | |
45 | */ | |
46 | struct gcov_fn_info { | |
47 | unsigned int ident; | |
48 | unsigned int checksum; | |
49 | unsigned int n_ctrs[0]; | |
50 | }; | |
51 | ||
52 | /** | |
53 | * struct gcov_ctr_info - profiling data per counter type | |
54 | * @num: number of counter values for this type | |
55 | * @values: array of counter values for this type | |
56 | * @merge: merge function for counter values of this type (unused) | |
57 | * | |
58 | * This data is generated by gcc during compilation and doesn't change | |
59 | * at run-time with the exception of the values array. | |
60 | */ | |
61 | struct gcov_ctr_info { | |
62 | unsigned int num; | |
63 | gcov_type *values; | |
64 | void (*merge)(gcov_type *, unsigned int); | |
65 | }; | |
66 | ||
67 | /** | |
68 | * struct gcov_info - profiling data per object file | |
69 | * @version: gcov version magic indicating the gcc version used for compilation | |
70 | * @next: list head for a singly-linked list | |
71 | * @stamp: time stamp | |
72 | * @filename: name of the associated gcov data file | |
73 | * @n_functions: number of instrumented functions | |
74 | * @functions: function data | |
75 | * @ctr_mask: mask specifying which counter types are active | |
76 | * @counts: counter data per counter type | |
77 | * | |
78 | * This data is generated by gcc during compilation and doesn't change | |
79 | * at run-time with the exception of the next pointer. | |
80 | */ | |
81 | struct gcov_info { | |
82 | unsigned int version; | |
83 | struct gcov_info *next; | |
84 | unsigned int stamp; | |
85 | const char *filename; | |
86 | unsigned int n_functions; | |
87 | const struct gcov_fn_info *functions; | |
88 | unsigned int ctr_mask; | |
89 | struct gcov_ctr_info counts[0]; | |
90 | }; | |
91 | ||
92 | /* Base interface. */ | |
93 | enum gcov_action { | |
94 | GCOV_ADD, | |
95 | GCOV_REMOVE, | |
96 | }; | |
97 | ||
98 | void gcov_event(enum gcov_action action, struct gcov_info *info); | |
99 | void gcov_enable_events(void); | |
100 | ||
101 | /* Iterator control. */ | |
102 | struct seq_file; | |
103 | struct gcov_iterator; | |
104 | ||
105 | struct gcov_iterator *gcov_iter_new(struct gcov_info *info); | |
106 | void gcov_iter_free(struct gcov_iterator *iter); | |
107 | void gcov_iter_start(struct gcov_iterator *iter); | |
108 | int gcov_iter_next(struct gcov_iterator *iter); | |
109 | int gcov_iter_write(struct gcov_iterator *iter, struct seq_file *seq); | |
110 | struct gcov_info *gcov_iter_get_info(struct gcov_iterator *iter); | |
111 | ||
112 | /* gcov_info control. */ | |
113 | void gcov_info_reset(struct gcov_info *info); | |
114 | int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2); | |
115 | void gcov_info_add(struct gcov_info *dest, struct gcov_info *source); | |
116 | struct gcov_info *gcov_info_dup(struct gcov_info *info); | |
117 | void gcov_info_free(struct gcov_info *info); | |
118 | ||
119 | struct gcov_link { | |
120 | enum { | |
121 | OBJ_TREE, | |
122 | SRC_TREE, | |
123 | } dir; | |
124 | const char *ext; | |
125 | }; | |
126 | extern const struct gcov_link gcov_link[]; | |
127 | ||
128 | #endif /* GCOV_H */ |