Release 4.18 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) {}
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static inline void kcov_task_exit(struct task_struct *t) {}
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static inline void kcov_prepare_switch(struct task_struct *t) {}
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static inline void kcov_finish_switch(struct task_struct *t) {}

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#endif /* CONFIG_KCOV */
#endif /* _LINUX_KCOV_H */
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Directory: include/linux

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