1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _LINUX_KCOV_H 3#define _LINUX_KCOV_H 4 5#include <uapi/linux/kcov.h> 6 7struct task_struct; 8 9#ifdef CONFIG_KCOV 10 11enum kcov_mode { 12 /* Coverage collection is not enabled yet. */ 13 KCOV_MODE_DISABLED = 0, 14 /* KCOV was initialized, but tracing mode hasn't been chosen yet. */ 15 KCOV_MODE_INIT = 1, 16 /* 17 * Tracing coverage collection mode. 18 * Covered PCs are collected in a per-task buffer. 19 */ 20 KCOV_MODE_TRACE_PC = 2, 21 /* Collecting comparison operands mode. */ 22 KCOV_MODE_TRACE_CMP = 3, 23}; 24 25#define KCOV_IN_CTXSW (1 << 30) 26 27void kcov_task_init(struct task_struct *t); 28void kcov_task_exit(struct task_struct *t); 29 30#define kcov_prepare_switch(t) \ 31do { \ 32 (t)->kcov_mode |= KCOV_IN_CTXSW; \ 33} while (0) 34 35#define kcov_finish_switch(t) \ 36do { \ 37 (t)->kcov_mode &= ~KCOV_IN_CTXSW; \ 38} while (0) 39 40#else 41 42static inline void kcov_task_init(struct task_struct *t) {} 43static inline void kcov_task_exit(struct task_struct *t) {} 44static inline void kcov_prepare_switch(struct task_struct *t) {} 45static inline void kcov_finish_switch(struct task_struct *t) {} 46 47#endif /* CONFIG_KCOV */ 48#endif /* _LINUX_KCOV_H */ 49