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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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2 | #ifndef _LINUX_KCOV_H |
3 | #define _LINUX_KCOV_H | |
4 | ||
5 | #include <uapi/linux/kcov.h> | |
6 | ||
7 | struct task_struct; | |
8 | ||
9 | #ifdef CONFIG_KCOV | |
10 | ||
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11 | enum kcov_mode { |
12 | /* Coverage collection is not enabled yet. */ | |
13 | KCOV_MODE_DISABLED = 0, | |
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14 | /* KCOV was initialized, but tracing mode hasn't been chosen yet. */ |
15 | KCOV_MODE_INIT = 1, | |
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16 | /* |
17 | * Tracing coverage collection mode. | |
18 | * Covered PCs are collected in a per-task buffer. | |
19 | */ | |
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20 | KCOV_MODE_TRACE_PC = 2, |
21 | /* Collecting comparison operands mode. */ | |
22 | KCOV_MODE_TRACE_CMP = 3, | |
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23 | }; |
24 | ||
0ed557aa MR |
25 | #define KCOV_IN_CTXSW (1 << 30) |
26 | ||
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27 | void kcov_task_init(struct task_struct *t); |
28 | void kcov_task_exit(struct task_struct *t); | |
29 | ||
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30 | #define kcov_prepare_switch(t) \ |
31 | do { \ | |
32 | (t)->kcov_mode |= KCOV_IN_CTXSW; \ | |
33 | } while (0) | |
34 | ||
35 | #define kcov_finish_switch(t) \ | |
36 | do { \ | |
37 | (t)->kcov_mode &= ~KCOV_IN_CTXSW; \ | |
38 | } while (0) | |
39 | ||
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40 | #else |
41 | ||
42 | static inline void kcov_task_init(struct task_struct *t) {} | |
43 | static inline void kcov_task_exit(struct task_struct *t) {} | |
0ed557aa MR |
44 | static inline void kcov_prepare_switch(struct task_struct *t) {} |
45 | static inline void kcov_finish_switch(struct task_struct *t) {} | |
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46 | |
47 | #endif /* CONFIG_KCOV */ | |
48 | #endif /* _LINUX_KCOV_H */ |