#include <assert.h>
#include <errno.h>
#include <sys/mman.h>
#include <string.h>
#include <unistd.h>
#include <linux/perf_event.h>
#include <linux/version.h>
#include <hpcrun/messages/messages.h>
#include "perf_mmap.h"
#include "perf-util.h"
#include "perf_barrier.h"

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Macros
#define	MMAP_OFFSET_0 0

#define	PERF_DATA_PAGE_EXP 1

#define	PERF_DATA_PAGES (1 << PERF_DATA_PAGE_EXP)

#define	PERF_MMAP_SIZE(pagesz) ((pagesz) * (PERF_DATA_PAGES + 1))

#define	PERF_TAIL_MASK(pagesz) (((pagesz) * PERF_DATA_PAGES) - 1)

Functions
static void	skip_perf_data (pe_mmap_t *current_perf_mmap, size_t sz) __attribute__((unused))

static u64	perf_mmap_read_head (pe_mmap_t *hdr)

static int	num_of_more_perf_data (pe_mmap_t *hdr)

static int	has_more_perf_data (pe_mmap_t *hdr)

static int	perf_read (pe_mmap_t current_perf_mmap, void buf, size_t bytes_wanted)

static int	perf_read_header (pe_mmap_t current_perf_mmap, pe_header_t hdr)

static int	perf_read_u32 (pe_mmap_t current_perf_mmap, u32 val)

static int	perf_read_u64 (pe_mmap_t current_perf_mmap, u64 val)

static void	handle_struct_read_format (pe_mmap_t *perf_mmap, int read_format)

static int	perf_sample_callchain (pe_mmap_t current_perf_mmap, perf_mmap_data_t mmap_data)

static int	parse_buffer (int sample_type, pe_mmap_t current_perf_mmap, struct perf_event_attr attr, perf_mmap_data_t *mmap_info)

int	read_perf_buffer (pe_mmap_t current_perf_mmap, struct perf_event_attr attr, perf_mmap_data_t *mmap_info)

pe_mmap_t *	set_mmap (int perf_fd)

void	perf_unmmap (pe_mmap_t *mmap)

void	perf_mmap_init ()

Variables
static int	pagesize = 0

static size_t	tail_mask = 0

Macro Definition Documentation

◆ MMAP_OFFSET_0

#define MMAP_OFFSET_0 0

Definition at line 84 of file perf_mmap.c.

◆ PERF_DATA_PAGE_EXP

#define PERF_DATA_PAGE_EXP 1

Definition at line 86 of file perf_mmap.c.

◆ PERF_DATA_PAGES

#define PERF_DATA_PAGES (1 << PERF_DATA_PAGE_EXP)

Definition at line 87 of file perf_mmap.c.

◆ PERF_MMAP_SIZE

#define PERF_MMAP_SIZE ( pagesz ) ((pagesz) * (PERF_DATA_PAGES + 1))

Definition at line 89 of file perf_mmap.c.

◆ PERF_TAIL_MASK

#define PERF_TAIL_MASK ( pagesz ) (((pagesz) * PERF_DATA_PAGES) - 1)

Definition at line 90 of file perf_mmap.c.

Function Documentation

◆ handle_struct_read_format()

static void handle_struct_read_format	(	pe_mmap_t *	perf_mmap,
		int	read_format
	)

static

Definition at line 228 of file perf_mmap.c.

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◆ has_more_perf_data()

static int has_more_perf_data ( pe_mmap_t * hdr )

static

Definition at line 140 of file perf_mmap.c.

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◆ num_of_more_perf_data()

static int num_of_more_perf_data ( pe_mmap_t * hdr )

static

Definition at line 130 of file perf_mmap.c.

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◆ parse_buffer()

static int parse_buffer	(	int	sample_type,
		pe_mmap_t *	current_perf_mmap,
		struct perf_event_attr *	attr,
		perf_mmap_data_t *	mmap_info
	)

static

parse mmapped buffer and copy the values into perf_mmap_data_t mmap_info. we assume mmap_info is already initialized. returns the number of read event attributes

Definition at line 319 of file perf_mmap.c.

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