1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * Profiling infrastructure declarations. |
4 | * |
5 | * This file is based on gcc-internal definitions. Data structures are |
6 | * defined to be compatible with gcc counterparts. For a better |
7 | * understanding, refer to gcc source: gcc/gcov-io.h. |
8 | * |
9 | * Copyright IBM Corp. 2009 |
10 | * Author(s): Peter Oberparleiter <oberpar@linux.vnet.ibm.com> |
11 | * |
12 | * Uses gcc-internal data definitions. |
13 | */ |
14 | |
15 | #ifndef GCOV_H |
16 | #define GCOV_H GCOV_H |
17 | |
18 | #include <linux/module.h> |
19 | #include <linux/types.h> |
20 | |
21 | /* |
22 | * Profiling data types used for gcc 3.4 and above - these are defined by |
23 | * gcc and need to be kept as close to the original definition as possible to |
24 | * remain compatible. |
25 | */ |
26 | #define GCOV_DATA_MAGIC ((unsigned int) 0x67636461) |
27 | #define GCOV_TAG_FUNCTION ((unsigned int) 0x01000000) |
28 | #define GCOV_TAG_COUNTER_BASE ((unsigned int) 0x01a10000) |
29 | #define GCOV_TAG_FOR_COUNTER(count) \ |
30 | (GCOV_TAG_COUNTER_BASE + ((unsigned int) (count) << 17)) |
31 | |
32 | #if BITS_PER_LONG >= 64 |
33 | typedef long gcov_type; |
34 | #else |
35 | typedef long long gcov_type; |
36 | #endif |
37 | |
38 | /* Opaque gcov_info. The gcov structures can change as for example in gcc 4.7 so |
39 | * we cannot use full definition here and they need to be placed in gcc specific |
40 | * implementation of gcov. This also means no direct access to the members in |
41 | * generic code and usage of the interface below.*/ |
42 | struct gcov_info; |
43 | |
44 | /* Interface to access gcov_info data */ |
45 | const char *gcov_info_filename(struct gcov_info *info); |
46 | unsigned int gcov_info_version(struct gcov_info *info); |
47 | struct gcov_info *gcov_info_next(struct gcov_info *info); |
48 | void gcov_info_link(struct gcov_info *info); |
49 | void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info); |
50 | bool gcov_info_within_module(struct gcov_info *info, struct module *mod); |
51 | size_t convert_to_gcda(char *buffer, struct gcov_info *info); |
52 | |
53 | /* Base interface. */ |
54 | enum gcov_action { |
55 | GCOV_ADD, |
56 | GCOV_REMOVE, |
57 | }; |
58 | |
59 | void gcov_event(enum gcov_action action, struct gcov_info *info); |
60 | void gcov_enable_events(void); |
61 | |
62 | /* writing helpers */ |
63 | size_t store_gcov_u32(void *buffer, size_t off, u32 v); |
64 | size_t store_gcov_u64(void *buffer, size_t off, u64 v); |
65 | |
66 | /* gcov_info control. */ |
67 | void gcov_info_reset(struct gcov_info *info); |
68 | int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2); |
69 | void gcov_info_add(struct gcov_info *dest, struct gcov_info *source); |
70 | struct gcov_info *gcov_info_dup(struct gcov_info *info); |
71 | void gcov_info_free(struct gcov_info *info); |
72 | |
73 | struct gcov_link { |
74 | enum { |
75 | OBJ_TREE, |
76 | SRC_TREE, |
77 | } dir; |
78 | const char *ext; |
79 | }; |
80 | extern const struct gcov_link gcov_link[]; |
81 | |
82 | extern int gcov_events_enabled; |
83 | extern struct mutex gcov_lock; |
84 | |
85 | #endif /* GCOV_H */ |
86 | |