[linux-2.6-block.git] / tools / perf / util / util.h

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

#define _BSD_SOURCE 1
/* glibc 2.20 deprecates _BSD_SOURCE in favour of _DEFAULT_SOURCE */
#define _DEFAULT_SOURCE 1

#include <dirent.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stddef.h>
#include <linux/compiler.h>
#include <sys/types.h>
#ifndef __cplusplus
#include <internal/cpumap.h>
#endif

extern const char perf_usage_string[];
extern const char perf_more_info_string[];

extern const char *input_name;

/* This will control if perf_{host,guest} will set attr.exclude_{host,guest}. */
extern bool exclude_GH_default;

extern bool perf_host;
extern bool perf_guest;

/* General helper functions */
void usage(const char *err) __noreturn;
void die(const char *err, ...) __noreturn __printf(1, 2);

struct dirent;
struct strlist;

int mkdir_p(char *path, mode_t mode);
int rm_rf(const char *path);
int rm_rf_perf_data(const char *path);
struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *));
bool lsdir_no_dot_filter(const char *name, struct dirent *d);

size_t hex_width(u64 v);

int sysctl__max_stack(void);

bool sysctl__nmi_watchdog_enabled(void);

int perf_tip(char **strp, const char *dirpath);

#ifndef HAVE_SCHED_GETCPU_SUPPORT
int sched_getcpu(void);
#endif

#ifndef HAVE_SCANDIRAT_SUPPORT
int scandirat(int dirfd, const char *dirp,
	      struct dirent ***namelist,
	      int (*filter)(const struct dirent *),
	      int (*compar)(const struct dirent **, const struct dirent **));
#endif

extern bool perf_singlethreaded;

void perf_set_singlethreaded(void);
void perf_set_multithreaded(void);

char *perf_exe(char *buf, int len);

#ifndef O_CLOEXEC
#ifdef __sparc__
#define O_CLOEXEC      0x400000
#elif defined(__alpha__) || defined(__hppa__)
#define O_CLOEXEC      010000000
#else
#define O_CLOEXEC      02000000
#endif
#endif

struct perf_debuginfod {
	const char	*urls;
	bool		 set;
};
void perf_debuginfod_setup(struct perf_debuginfod *di);

char *filename_with_chroot(int pid, const char *filename);

int do_realloc_array_as_needed(void **arr, size_t *arr_sz, size_t x,
			       size_t msz, const void *init_val);

#define realloc_array_as_needed(a, n, x, v) ({			\
	typeof(x) __x = (x);					\
	__x >= (n) ?						\
		do_realloc_array_as_needed((void **)&(a),	\
					   &(n),		\
					   __x,			\
					   sizeof(*(a)),	\
					   (const void *)(v)) :	\
		0;						\
	})

static inline bool host_is_bigendian(void)
{
#ifdef __BYTE_ORDER__
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
	return false;
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
	return true;
#else
#error "Unrecognized __BYTE_ORDER__"
#endif
#else /* !__BYTE_ORDER__ */
	unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0};
	unsigned int *ptr;

	ptr = (unsigned int *)(void *)str;
	return *ptr == 0x01020304;
#endif
}

#endif /* __PERF_UTIL_H */
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef __PERF_UTIL_H
	3	#define __PERF_UTIL_H
	4
	5	#define _BSD_SOURCE 1
	6	/* glibc 2.20 deprecates _BSD_SOURCE in favour of _DEFAULT_SOURCE */
	7	#define _DEFAULT_SOURCE 1
	8
	9	#include <dirent.h>
	10	#include <fcntl.h>
	11	#include <stdbool.h>
	12	#include <stddef.h>
	13	#include <linux/compiler.h>
	14	#include <sys/types.h>
	15	#ifndef __cplusplus
	16	#include <internal/cpumap.h>
	17	#endif
	18
	19	extern const char perf_usage_string[];
	20	extern const char perf_more_info_string[];
	21
	22	extern const char *input_name;
	23
	24	/* This will control if perf_{host,guest} will set attr.exclude_{host,guest}. */
	25	extern bool exclude_GH_default;
	26
	27	extern bool perf_host;
	28	extern bool perf_guest;
	29
	30	/* General helper functions */
	31	void usage(const char *err) __noreturn;
	32	void die(const char *err, ...) __noreturn __printf(1, 2);
	33
	34	struct dirent;
	35	struct strlist;
	36
	37	int mkdir_p(char *path, mode_t mode);
	38	int rm_rf(const char *path);
	39	int rm_rf_perf_data(const char *path);
	40	struct strlist lsdir(const char name, bool (filter)(const char , struct dirent *));
	41	bool lsdir_no_dot_filter(const char name, struct dirent d);
	42
	43	size_t hex_width(u64 v);
	44
	45	int sysctl__max_stack(void);
	46
	47	bool sysctl__nmi_watchdog_enabled(void);
	48
	49	int perf_tip(char *strp, const char dirpath);
	50
	51	#ifndef HAVE_SCHED_GETCPU_SUPPORT
	52	int sched_getcpu(void);
	53	#endif
	54
	55	#ifndef HAVE_SCANDIRAT_SUPPORT
	56	int scandirat(int dirfd, const char *dirp,
	57	struct dirent ***namelist,
	58	int (filter)(const struct dirent ),
	59	int (compar)(const struct dirent , const struct dirent *));
	60	#endif
	61
	62	extern bool perf_singlethreaded;
	63
	64	void perf_set_singlethreaded(void);
	65	void perf_set_multithreaded(void);
	66
	67	char perf_exe(char buf, int len);
	68
	69	#ifndef O_CLOEXEC
	70	#ifdef __sparc__
	71	#define O_CLOEXEC 0x400000
	72	#elif defined(__alpha__) \|\| defined(__hppa__)
	73	#define O_CLOEXEC 010000000
	74	#else
	75	#define O_CLOEXEC 02000000
	76	#endif
	77	#endif
	78
	79	struct perf_debuginfod {
	80	const char *urls;
	81	bool set;
	82	};
	83	void perf_debuginfod_setup(struct perf_debuginfod *di);
	84
	85	char filename_with_chroot(int pid, const char filename);
	86
	87	int do_realloc_array_as_needed(void *arr, size_t arr_sz, size_t x,
	88	size_t msz, const void *init_val);
	89
	90	#define realloc_array_as_needed(a, n, x, v) ({ \
	91	typeof(x) __x = (x); \
	92	__x >= (n) ? \
	93	do_realloc_array_as_needed((void **)&(a), \
	94	&(n), \
	95	__x, \
	96	sizeof(*(a)), \
	97	(const void *)(v)) : \
	98	0; \
	99	})
	100
	101	static inline bool host_is_bigendian(void)
	102	{
	103	#ifdef __BYTE_ORDER__
	104	#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
	105	return false;
	106	#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
	107	return true;
	108	#else
	109	#error "Unrecognized __BYTE_ORDER__"
	110	#endif
	111	#else /* !__BYTE_ORDER__ */
	112	unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0};
	113	unsigned int *ptr;
	114
	115	ptr = (unsigned int )(void )str;
	116	return *ptr == 0x01020304;
	117	#endif
	118	}
	119
	120	#endif /* __PERF_UTIL_H */