94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef _LINUX_KCOV_H
|
||
|
|
#define _LINUX_KCOV_H
|
||
|
|
|
||
|
|
#include <linux/sched.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));
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The softirq flavor of kcov_remote_*() functions is introduced as a temporary
|
||
|
|
* work around for kcov's lack of nested remote coverage sections support in
|
||
|
|
* task context. Adding support for nested sections is tracked in:
|
||
|
|
* https://bugzilla.kernel.org/show_bug.cgi?id=210337
|
||
|
|
*/
|
||
|
|
|
||
|
|
static inline void kcov_remote_start_usb_softirq(u64 id)
|
||
|
|
{
|
||
|
|
if (in_serving_softirq())
|
||
|
|
kcov_remote_start_usb(id);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void kcov_remote_stop_softirq(void)
|
||
|
|
{
|
||
|
|
if (in_serving_softirq())
|
||
|
|
kcov_remote_stop();
|
||
|
|
}
|
||
|
|
|
||
|
|
#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) {}
|
||
|
|
static inline void kcov_remote_start_usb_softirq(u64 id) {}
|
||
|
|
static inline void kcov_remote_stop_softirq(void) {}
|
||
|
|
|
||
|
|
#endif /* CONFIG_KCOV */
|
||
|
|
#endif /* _LINUX_KCOV_H */
|