util.c File Reference

#include "../perf.h"
#include "util.h"
#include "debug.h"
#include <api/fs/fs.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <dirent.h>
#include <fcntl.h>
#include <inttypes.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/time64.h>
#include <unistd.h>
#include "strlist.h"

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Functions
void	perf_set_singlethreaded (void)
void	perf_set_multithreaded (void)
static void	cache_line_size (int *cacheline_sizep)
int	cacheline_size (void)
int	sysctl__max_stack (void)
void	event_attr_init (struct perf_event_attr *attr)
int	mkdir_p (char *path, mode_t mode)
int	rm_rf (const char *path)
bool	lsdir_no_dot_filter (const char *name __maybe_unused, struct dirent *d)
struct strlist *	lsdir (const char *name, bool(*filter)(const char *, struct dirent *))
static int	slow_copyfile (const char *from, const char *to, struct nsinfo *nsi)
static int	copyfile_offset (int ifd, loff_t off_in, int ofd, loff_t off_out, u64 size)
static int	copyfile_mode_ns (const char *from, const char *to, mode_t mode, struct nsinfo *nsi)
int	copyfile_ns (const char *from, const char *to, struct nsinfo *nsi)
int	copyfile_mode (const char *from, const char *to, mode_t mode)
int	copyfile (const char *from, const char *to)
static ssize_t	ion (bool is_read, int fd, void *buf, size_t n)
ssize_t	readn (int fd, void *buf, size_t n)
ssize_t	writen (int fd, const void *buf, size_t n)
size_t	hex_width (u64 v)
int	hex2u64 (const char *ptr, u64 *long_val)
int	perf_event_paranoid (void)
static int	fetch_ubuntu_kernel_version (unsigned int *puint)
int	fetch_kernel_version (unsigned int *puint, char *str, size_t str_size)
const char *	perf_tip (const char *dirpath)

Variables
bool	perf_singlethreaded = true
unsigned int	page_size
int	sysctl_perf_event_max_stack = PERF_MAX_STACK_DEPTH
int	sysctl_perf_event_max_contexts_per_stack = PERF_MAX_CONTEXTS_PER_STACK
bool	test_attr__enabled
bool	perf_host = true
bool	perf_guest = false

Function Documentation

cache_line_size()

static void cache_line_size ( int *  cacheline_sizep )

static

Definition at line 45 of file util.c.

cacheline_size()

int cacheline_size

(

void

)

Definition at line 52 of file util.c.

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copyfile()

int copyfile	(	const char *	from,
		const char *	to
	)

Definition at line 320 of file util.c.

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copyfile_mode()

int copyfile_mode	(	const char *	from,
		const char *	to,
		mode_t	mode
	)

Definition at line 315 of file util.c.

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copyfile_mode_ns()

static int copyfile_mode_ns ( const char *  from, const char *  to, mode_t  mode, struct nsinfo *  nsi  )

static

Definition at line 252 of file util.c.

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copyfile_ns()

int copyfile_ns	(	const char *	from,
		const char *	to,
		struct nsinfo *	nsi
	)

Definition at line 310 of file util.c.

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copyfile_offset()

static int copyfile_offset ( int  ifd, loff_t  off_in, int  ofd, loff_t  off_out, u64  size  )

static

Definition at line 224 of file util.c.

event_attr_init()

void event_attr_init

(

struct perf_event_attr *

attr

)

Definition at line 83 of file util.c.

fetch_kernel_version()

int fetch_kernel_version	(	unsigned int *	puint,
		char *	str,
		size_t	str_size
	)

Definition at line 447 of file util.c.

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fetch_ubuntu_kernel_version()

static int fetch_ubuntu_kernel_version ( unsigned int *  puint )

static

Definition at line 398 of file util.c.

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hex2u64()

int hex2u64	(	const char *	ptr,
		u64 *	long_val
	)

Definition at line 379 of file util.c.

hex_width()

size_t hex_width

(

u64

v

)

Definition at line 365 of file util.c.

ion()

static ssize_t ion ( bool  is_read, int  fd, void *  buf, size_t  n  )

static

Definition at line 325 of file util.c.

lsdir()

struct strlist* lsdir	(	const char *	name,
		bool(*)(const char *, struct dirent *)	filter
	)

Definition at line 166 of file util.c.

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lsdir_no_dot_filter()

bool lsdir_no_dot_filter	(	const char *name	__maybe_unused,
		struct dirent *	d
	)

Definition at line 160 of file util.c.

mkdir_p()

int mkdir_p	(	char *	path,
		mode_t	mode
	)

Definition at line 93 of file util.c.

perf_event_paranoid()

int perf_event_paranoid

(

void

)

Definition at line 388 of file util.c.

perf_set_multithreaded()

void perf_set_multithreaded

(

void

)

Definition at line 35 of file util.c.

perf_set_singlethreaded()

void perf_set_singlethreaded

(

void

)

Definition at line 30 of file util.c.

perf_tip()

const char* perf_tip

(

const char *

dirpath

)

Definition at line 482 of file util.c.

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readn()

ssize_t readn	(	int	fd,
		void *	buf,
		size_t	n
	)

Definition at line 351 of file util.c.

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rm_rf()

int rm_rf

(

const char *

path

)

Definition at line 119 of file util.c.

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slow_copyfile()

static int slow_copyfile ( const char *  from, const char *  to, struct nsinfo *  nsi  )

static

Definition at line 193 of file util.c.

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sysctl__max_stack()

int sysctl__max_stack

(

void

)

Definition at line 65 of file util.c.

writen()

ssize_t writen	(	int	fd,
		const void *	buf,
		size_t	n
	)

Definition at line 359 of file util.c.

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Variable Documentation

page_size

unsigned int page_size

Definition at line 40 of file util.c.

perf_guest

bool perf_guest = false

Definition at line 81 of file util.c.

perf_host

bool perf_host = true

Definition at line 80 of file util.c.

perf_singlethreaded

bool perf_singlethreaded = true

Definition at line 28 of file util.c.

sysctl_perf_event_max_contexts_per_stack

int sysctl_perf_event_max_contexts_per_stack = PERF_MAX_CONTEXTS_PER_STACK

Definition at line 63 of file util.c.

sysctl_perf_event_max_stack

int sysctl_perf_event_max_stack = PERF_MAX_STACK_DEPTH

Definition at line 62 of file util.c.

test_attr__enabled

bool test_attr__enabled

Definition at line 78 of file util.c.