opd_image.c File Reference

#include "opd_image.h"
#include "opd_printf.h"
#include "opd_sample_files.h"
#include "opd_24_stats.h"
#include "oprofiled.h"
#include "op_file.h"
#include "op_config_24.h"
#include "op_libiberty.h"
#include "op_string.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>

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Defines
#define	OPD_IMAGE_HASH_SIZE 2048
Functions
void	opd_init_images (void)
int	opd_get_nr_images (void)
void	opd_delete_image (struct opd_image *image)
void	opd_for_each_image (opd_image_cb image_cb)
static size_t	opd_hash_image (char const *name, pid_t tid, pid_t tgid)
static struct opd_image *	opd_new_image (char const name, char const app_name, int kernel, pid_t tid, pid_t tgid)
static int	is_same_image (struct opd_image const image, char const app_name, pid_t tid, pid_t tgid)
static struct opd_image *	opd_find_image (char const name, char const app_name, pid_t tid, pid_t tgid)
struct opd_image *	opd_get_image (char const name, char const app_name, int kernel, pid_t tid, pid_t tgid)
struct opd_image *	opd_get_kernel_image (char const name, char const app_name, pid_t tid, pid_t tgid)
Variables
static int	nr_images
static struct list_head	opd_images [OPD_IMAGE_HASH_SIZE]

Detailed Description

Management of binary images

Remarks:: Copyright 2002 OProfile authors; Read the file COPYING

Author:: John Levon; Philippe Elie

Definition in file opd_image.c.

Define Documentation

#define OPD_IMAGE_HASH_SIZE 2048

Definition at line 31 of file opd_image.c.

Referenced by opd_for_each_image(), opd_hash_image(), and opd_init_images().

Function Documentation

static int is_same_image	(	struct opd_image const *	image,
		char const *	app_name,
		pid_t	tid,
		pid_t	tgid
	)			`[static]`

is_same_image - check for identical image

Parameters:

	image	image to compare
	name	name of image
	app_name	image must belong to this application name
	tid	thread id
	tgid	thread group id

on entry caller have checked than strcmp(image->name, name) == 0 return 0 if the couple (name, app_name) refers to same image

Definition at line 177 of file opd_image.c.

References opd_image::app_name, opd_image::name, separate_lib, separate_thread, opd_image::tgid, and opd_image::tid.

Referenced by opd_find_image().

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void opd_delete_image ( struct opd_image * image )

Parameters:

image

the image pointer

Decrement reference count of image, if reference count is zero flush and close the samples files then freeze all memory belonging to this image.

Definition at line 49 of file opd_image.c.

References opd_image::app_name, opd_image::hash_next, opd_image::kernel, list_del(), opd_image::name, nr_images, opd_close_image_samples_files(), opd_image::ref_count, opd_image::tgid, opd_image::tid, verbprintf, and vmisc.

Referenced by opd_24_exit(), opd_kill_maps(), and opd_remove_kernel_mapping().

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static struct opd_image* opd_find_image	(	char const *	name,
		char const *	app_name,
		pid_t	tid,
		pid_t	tgid
	)			`[static, read]`

opd_find_image - find an image

Parameters:

	name	name of image to find
	hash	hash of image to find
	app_name	the application name where belongs this image
	tid	thread id
	tgid	thread group id

Returns the image pointer for the file specified by name, or NULL.

Definition at line 221 of file opd_image.c.

References is_same_image(), list_entry, list_for_each, opd_image::name, opd_24_stats, opd_hash_image(), OPD_IMAGE_HASH_ACCESS, OPD_IMAGE_HASH_DEPTH, and opd_images.

Referenced by opd_get_image().

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void opd_for_each_image ( opd_image_cb imagecb )

Parameters:

imagecb

callback to apply onto each existing image struct

the callback receive a struct opd_image * (not a const struct) and is allowed to freeze the image struct itself.

Definition at line 79 of file opd_image.c.

References opd_image::hash_next, list_entry, list_for_each_safe, OPD_IMAGE_HASH_SIZE, and opd_images.

Referenced by opd_24_exit(), and opd_sighup().

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struct opd_image* opd_get_image	(	char const *	name,
		char const *	app_name,
		int	kernel,
		pid_t	tid,
		pid_t	tgid
	)			`[read]`

opd_get_image - get an image from the image structure

Parameters:

	name	name of image
	app_name	the application name where belongs this image
	kernel	is the image a kernel/module image
	tid	thread id
	tgid	thread group id

Get the image specified by the file name name from the image structure. If it is not present, the image is added to the structure. In either case, the image number is returned.

Definition at line 249 of file opd_image.c.

References opd_find_image(), and opd_new_image().

Referenced by opd_add_ascii_map(), opd_get_ascii_maps(), opd_get_kernel_image(), opd_handle_fork(), and opd_handle_mapping().

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struct opd_image* opd_get_kernel_image	(	char const *	name,
		char const *	app_name,
		pid_t	tid,
		pid_t	tgid
	)			`[read]`

opd_get_kernel_image - get a kernel image

Parameters:

	name	of image
	app_name	application owner of this kernel image. non-null only when separate_kernel_sample != 0
	tid	thread id
	tgid	thread group id

Create and initialise an image adding it to the image lists and to image hash list. Note than at creation reference count is zero, it's caller responsabilities to incr this count.

Definition at line 260 of file opd_image.c.

References opd_get_image().

Referenced by opd_add_kernel_map(), opd_get_module_info(), and opd_init_kernel_image().

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int opd_get_nr_images ( void )

opd_get_nr_images - return number of images

Definition at line 43 of file opd_image.c.

References nr_images.

Referenced by opd_print_24_stats().

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static size_t opd_hash_image	(	char const *	name,
		pid_t	tid,
		pid_t	tgid
	)			`[static]`

opd_hash_image - hash an image

Parameters:

	hash	hash of image name
	tid	thread id
	tgid	thread group id

return the hash code for the passed parameters

Definition at line 103 of file opd_image.c.

References op_hash_string(), OPD_IMAGE_HASH_SIZE, and separate_thread.

Referenced by opd_find_image(), and opd_new_image().

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void opd_init_images ( void )

initialize opd_image container

Definition at line 35 of file opd_image.c.

References list_init(), OPD_IMAGE_HASH_SIZE, and opd_images.

Referenced by opd_24_init().

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static struct opd_image* opd_new_image	(	char const *	name,
		char const *	app_name,
		int	kernel,
		pid_t	tid,
		pid_t	tgid
	)			`[static, read]`

opd_new_image - create an image sample file

Parameters:

	app_name	the application name where belongs this image
	name	name of the image to add
	kernel	is the image a kernel/module image
	tid	thread id
	tgid	thread group id