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Release 4.15 kernel/gcov/gcov.h

Directory: kernel/gcov
/* SPDX-License-Identifier: GPL-2.0 */
 *  Profiling infrastructure declarations.
 *  This file is based on gcc-internal definitions. Data structures are
 *  defined to be compatible with gcc counterparts. For a better
 *  understanding, refer to gcc source: gcc/gcov-io.h.
 *    Copyright IBM Corp. 2009
 *    Author(s): Peter Oberparleiter <>
 *    Uses gcc-internal data definitions.

#ifndef GCOV_H

#define GCOV_H GCOV_H

#include <linux/types.h>

 * Profiling data types used for gcc 3.4 and above - these are defined by
 * gcc and need to be kept as close to the original definition as possible to
 * remain compatible.

#define GCOV_DATA_MAGIC		((unsigned int) 0x67636461)

#define GCOV_TAG_FUNCTION	((unsigned int) 0x01000000)

#define GCOV_TAG_COUNTER_BASE	((unsigned int) 0x01a10000)

#define GCOV_TAG_FOR_COUNTER(count)					\
	(GCOV_TAG_COUNTER_BASE + ((unsigned int) (count) << 17))

#if BITS_PER_LONG >= 64

typedef long gcov_type;

typedef long long gcov_type;

/* Opaque gcov_info. The gcov structures can change as for example in gcc 4.7 so
 * we cannot use full definition here and they need to be placed in gcc specific
 * implementation of gcov. This also means no direct access to the members in
 * generic code and usage of the interface below.*/
struct gcov_info;

/* Interface to access gcov_info data  */
const char *gcov_info_filename(struct gcov_info *info);
unsigned int gcov_info_version(struct gcov_info *info);
struct gcov_info *gcov_info_next(struct gcov_info *info);
void gcov_info_link(struct gcov_info *info);
void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info);

/* Base interface. */

enum gcov_action {

void gcov_event(enum gcov_action action, struct gcov_info *info);
void gcov_enable_events(void);

/* Iterator control. */
struct seq_file;
struct gcov_iterator;

struct gcov_iterator *gcov_iter_new(struct gcov_info *info);
void gcov_iter_free(struct gcov_iterator *iter);
void gcov_iter_start(struct gcov_iterator *iter);
int gcov_iter_next(struct gcov_iterator *iter);
int gcov_iter_write(struct gcov_iterator *iter, struct seq_file *seq);
struct gcov_info *gcov_iter_get_info(struct gcov_iterator *iter);

/* gcov_info control. */
void gcov_info_reset(struct gcov_info *info);
int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2);
void gcov_info_add(struct gcov_info *dest, struct gcov_info *source);
struct gcov_info *gcov_info_dup(struct gcov_info *info);
void gcov_info_free(struct gcov_info *info);

struct gcov_link {
	enum {
const char *ext;
extern const struct gcov_link gcov_link[];

#endif /* GCOV_H */

Overall Contributors

Peter Oberparleiter24984.41%133.33%
Frantisek Hrbata4515.25%133.33%
Greg Kroah-Hartman10.34%133.33%
Directory: kernel/gcov
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