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/* 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)
/* See Documentation/dev-tools/kcov.rst for usage details. */
void kcov_remote_start(u64 handle);
void kcov_remote_stop(void);
u64 kcov_common_handle(void);
static inline void kcov_remote_start_common(u64 id)
{
kcov_remote_start(kcov_remote_handle(KCOV_SUBSYSTEM_COMMON, id));
}
static inline void kcov_remote_start_usb(u64 id)
{
kcov_remote_start(kcov_remote_handle(KCOV_SUBSYSTEM_USB, id));
}
#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) {}
static inline void kcov_remote_start(u64 handle) {}
static inline void kcov_remote_stop(void) {}
static inline u64 kcov_common_handle(void)
{
return 0;
}
static inline void kcov_remote_start_common(u64 id) {}
static inline void kcov_remote_start_usb(u64 id) {}
#endif /* CONFIG_KCOV */
#endif /* _LINUX_KCOV_H */