[linux-2.6-block.git] / include / linux / kcov.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_KCOV_H
#define _LINUX_KCOV_H

#include <uapi/linux/kcov.h>

struct task_struct;

#ifdef CONFIG_KCOV

enum kcov_mode {
	/* Coverage collection is not enabled yet. */
	KCOV_MODE_DISABLED = 0,
	/* KCOV was initialized, but tracing mode hasn't been chosen yet. */
	KCOV_MODE_INIT = 1,
	/*
	 * Tracing coverage collection mode.
	 * Covered PCs are collected in a per-task buffer.
	 */
	KCOV_MODE_TRACE_PC = 2,
	/* Collecting comparison operands mode. */
	KCOV_MODE_TRACE_CMP = 3,
};

#define KCOV_IN_CTXSW	(1 << 30)

void kcov_task_init(struct task_struct *t);
void kcov_task_exit(struct task_struct *t);

#define kcov_prepare_switch(t)			\
do {						\
	(t)->kcov_mode |= KCOV_IN_CTXSW;	\
} while (0)

#define kcov_finish_switch(t)			\
do {						\
	(t)->kcov_mode &= ~KCOV_IN_CTXSW;	\
} while (0)

#else

static inline void kcov_task_init(struct task_struct *t) {}
static inline void kcov_task_exit(struct task_struct *t) {}
static inline void kcov_prepare_switch(struct task_struct *t) {}
static inline void kcov_finish_switch(struct task_struct *t) {}

#endif /* CONFIG_KCOV */
#endif /* _LINUX_KCOV_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
5c9a8750 DV	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
5c9a8750 DV	11	enum kcov_mode {
	12	/* Coverage collection is not enabled yet. */
	13	KCOV_MODE_DISABLED = 0,
ded97d2c VC	14	/* KCOV was initialized, but tracing mode hasn't been chosen yet. */
ded97d2c VC	15	KCOV_MODE_INIT = 1,
5c9a8750 DV	16	/*
	17	* Tracing coverage collection mode.
	18	* Covered PCs are collected in a per-task buffer.
	19	*/
ded97d2c VC	20	KCOV_MODE_TRACE_PC = 2,
	21	/* Collecting comparison operands mode. */
	22	KCOV_MODE_TRACE_CMP = 3,
5c9a8750 DV	23	};
5c9a8750 DV	24
0ed557aa MR	25	#define KCOV_IN_CTXSW (1 << 30)
0ed557aa MR	26
ded97d2c VC	27	void kcov_task_init(struct task_struct *t);
	28	void kcov_task_exit(struct task_struct *t);
	29
0ed557aa MR	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
5c9a8750 DV	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) {}
0ed557aa MR	45	static inline void kcov_finish_switch(struct task_struct *t) {}
5c9a8750 DV	46
	47	#endif /* CONFIG_KCOV */
	48	#endif /* _LINUX_KCOV_H */