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Add readprofile applet support.

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This commit is contained in:
Paul Mundt 2005-05-20 17:22:18 +00:00
parent 93850a56b2
commit 8b2d02ed34
5 changed files with 327 additions and 0 deletions
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3
include/applets.h
View File

@ -485,6 +485,9 @@
#ifdef CONFIG_READLINK
APPLET(readlink, readlink_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_READPROFILE
APPLET(readprofile, readprofile_main, _BB_DIR_USR_SBIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_REALPATH
APPLET(realpath, realpath_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
#endif

15
include/usage.h
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@ -2091,6 +2091,21 @@
USAGE_READLINK_FOLLOW("\n\nOptions:\n" \
"\t-f\tcanonicalize by following all symlinks")
#define readprofile_trivial_usage \
"[OPTIONS]..."
#define readprofile_full_usage \
"Options:\n" \
"\t -m <mapfile> (default: /boot/System.map)\n" \
"\t -p <profile> (default: /proc/profile)\n" \
"\t -M <mult> set the profiling multiplier to <mult>\n" \
"\t -i print only info about the sampling step\n" \
"\t -v print verbose data\n" \
"\t -a print all symbols, even if count is 0\n" \
"\t -b print individual histogram-bin counts\n" \
"\t -s print individual counters within functions\n" \
"\t -r reset all the counters (root only)\n" \
"\t -n disable byte order auto-detection"
#define realpath_trivial_usage \
"pathname ..."
#define realpath_full_usage \

6
util-linux/Config.in
View File

@ -351,5 +351,11 @@ config CONFIG_FEATURE_MTAB_FILENAME
value is /etc/mtab, which is where this file is located on most desktop
Linux systems.
config CONFIG_READPROFILE
bool "readprofile"
default n
help
This allows you to parse /proc/profile for basic profiling.
endmenu

1
util-linux/Makefile.in
View File

@ -44,6 +44,7 @@ UTILLINUX-$(CONFIG_PIVOT_ROOT) +=pivot_root.o
UTILLINUX-$(CONFIG_RDATE) +=rdate.o
UTILLINUX-$(CONFIG_SWAPONOFF) +=swaponoff.o
UTILLINUX-$(CONFIG_UMOUNT) +=umount.o
UTILLINUX-$(CONFIG_READPROFILE) +=readprofile.o
libraries-y+=$(UTILLINUX_DIR)$(UTILLINUX_AR)

302
util-linux/readprofile.c Normal file
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@ -0,0 +1,302 @@
/*
* readprofile.c - used to read /proc/profile
*
* Copyright (C) 1994,1996 Alessandro Rubini (rubini@ipvvis.unipv.it)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* 1999-02-22 Arkadiusz Mikiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
* 1999-09-01 Stephane Eranian <eranian@cello.hpl.hp.com>
* - 64bit clean patch
* 3Feb2001 Andrew Morton <andrewm@uow.edu.au>
* - -M option to write profile multiplier.
* 2001-11-07 Werner Almesberger <wa@almesberger.net>
* - byte order auto-detection and -n option
* 2001-11-09 Werner Almesberger <wa@almesberger.net>
* - skip step size (index 0)
* 2002-03-09 John Levon <moz@compsoc.man.ac.uk>
* - make maplineno do something
* 2002-11-28 Mads Martin Joergensen +
* - also try /boot/System.map-`uname -r`
* 2003-04-09 Werner Almesberger <wa@almesberger.net>
* - fixed off-by eight error and improved heuristics in byte order detection
* 2003-08-12 Nikita Danilov <Nikita@Namesys.COM>
* - added -s option; example of use:
* "readprofile -s -m /boot/System.map-test | grep __d_lookup | sort -n -k3"
*
* Taken from util-linux and adapted for busybox by
* Paul Mundt <lethal@linux-sh.org>.
*/
#include <errno.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include "busybox.h"
#define S_LEN 128
/* These are the defaults */
static char defaultmap[]="/boot/System.map";
static char defaultpro[]="/proc/profile";
int readprofile_main(int argc, char **argv)
{
FILE *map;
int proFd;
char *mapFile, *proFile, *mult=0;
unsigned long len=0, indx=1;
unsigned long long add0=0;
unsigned int step;
unsigned int *buf, total, fn_len;
unsigned long long fn_add, next_add; /* current and next address */
char fn_name[S_LEN], next_name[S_LEN]; /* current and next name */
char mode[8];
int c;
int optAll=0, optInfo=0, optReset=0, optVerbose=0, optNative=0;
int optBins=0, optSub=0;
char mapline[S_LEN];
int maplineno=1;
int header_printed;
#define next (current^1)
proFile = defaultpro;
mapFile = defaultmap;
while ((c = getopt(argc, argv, "M:m:np:itvarVbs")) != -1) {
switch(c) {
case 'm':
mapFile = optarg;
break;
case 'n':
optNative++;
break;
case 'p':
proFile = optarg;
break;
case 'a':
optAll++;
break;
case 'b':
optBins++;
break;
case 's':
optSub++;
break;
case 'i':
optInfo++;
break;
case 'M':
mult = optarg;
break;
case 'r':
optReset++;
break;
case 'v':
optVerbose++;
break;
default:
bb_show_usage();
}
}
if (optReset || mult) {
int multiplier, fd, to_write;
/*
* When writing the multiplier, if the length of the write is
* not sizeof(int), the multiplier is not changed
*/
if (mult) {
multiplier = strtoul(mult, 0, 10);
to_write = sizeof(int);
} else {
multiplier = 0;
to_write = 1; /* sth different from sizeof(int) */
}
fd = bb_xopen(defaultpro,O_WRONLY);
if (fd < 0)
bb_perror_msg_and_die(defaultpro);
if (write(fd, &multiplier, to_write) != to_write)
bb_perror_msg_and_die("error writing %s", defaultpro);
close(fd);
return EXIT_SUCCESS;
}
/*
* Use an fd for the profiling buffer, to skip stdio overhead
*/
if (((proFd = bb_xopen(proFile,O_RDONLY)) < 0)
|| ((int)(len=lseek(proFd,0,SEEK_END)) < 0)
|| (lseek(proFd,0,SEEK_SET) < 0))
bb_perror_msg_and_die(proFile);
if (!(buf = xmalloc(len)))
bb_perror_nomsg_and_die();
if (read(proFd,buf,len) != len)
bb_perror_msg_and_die(proFile);
close(proFd);
if (!optNative) {
int entries = len/sizeof(*buf);
int big = 0,small = 0,i;
unsigned *p;
for (p = buf+1; p < buf+entries; p++) {
if (*p & ~0U << (sizeof(*buf)*4))
big++;
if (*p & ((1 << (sizeof(*buf)*4))-1))
small++;
}
if (big > small) {
fprintf(stderr,"Assuming reversed byte order. "
"Use -n to force native byte order.\n");
for (p = buf; p < buf+entries; p++)
for (i = 0; i < sizeof(*buf)/2; i++) {
unsigned char *b = (unsigned char *) p;
unsigned char tmp;
tmp = b[i];
b[i] = b[sizeof(*buf)-i-1];
b[sizeof(*buf)-i-1] = tmp;
}
}
}
step = buf[0];
if (optInfo) {
printf("Sampling_step: %i\n", step);
return EXIT_SUCCESS;
}
total = 0;
map = bb_xfopen(mapFile, "r");
if (map == NULL)
bb_perror_msg_and_die(mapFile);
while (fgets(mapline,S_LEN,map)) {
if (sscanf(mapline,"%llx %s %s",&fn_add,mode,fn_name) != 3)
bb_error_msg_and_die("%s(%i): wrong map line",
mapFile, maplineno);
if (!strcmp(fn_name,"_stext")) /* only elf works like this */ {
add0 = fn_add;
break;
}
maplineno++;
}
if (!add0)
bb_error_msg_and_die("can't find \"_stext\" in %s\n", mapFile);
/*
* Main loop.
*/
while (fgets(mapline,S_LEN,map)) {
unsigned int this = 0;
if (sscanf(mapline,"%llx %s %s",&next_add,mode,next_name) != 3)
bb_error_msg_and_die("%s(%i): wrong map line\n",
mapFile, maplineno);
header_printed = 0;
/* ignore any LEADING (before a '[tT]' symbol is found)
Absolute symbols */
if ((*mode == 'A' || *mode == '?') && total == 0) continue;
if (*mode != 'T' && *mode != 't' &&
*mode != 'W' && *mode != 'w')
break; /* only text is profiled */
if (indx >= len / sizeof(*buf))
bb_error_msg_and_die("profile address out of range. "
"Wrong map file?");
while (indx < (next_add-add0)/step) {
if (optBins && (buf[indx] || optAll)) {
if (!header_printed) {
printf ("%s:\n", fn_name);
header_printed = 1;
}
printf ("\t%llx\t%u\n", (indx - 1)*step + add0, buf[indx]);
}
this += buf[indx++];
}
total += this;
if (optBins) {
if (optVerbose || this > 0)
printf (" total\t\t\t\t%u\n", this);
} else if ((this || optAll) &&
(fn_len = next_add-fn_add) != 0) {
if (optVerbose)
printf("%016llx %-40s %6i %8.4f\n", fn_add,
fn_name,this,this/(double)fn_len);
else
printf("%6i %-40s %8.4f\n",
this,fn_name,this/(double)fn_len);
if (optSub) {
unsigned long long scan;
for (scan = (fn_add-add0)/step + 1;
scan < (next_add-add0)/step; scan++) {
unsigned long long addr;
addr = (scan - 1)*step + add0;
printf("\t%#llx\t%s+%#llx\t%u\n",
addr, fn_name, addr - fn_add,
buf[scan]);
}
}
}
fn_add = next_add;
strcpy(fn_name,next_name);
maplineno++;
}
/* clock ticks, out of kernel text - probably modules */
printf("%6i %s\n", buf[len/sizeof(*buf)-1], "*unknown*");
/* trailer */
if (optVerbose)
printf("%016x %-40s %6i %8.4f\n",
0,"total",total,total/(double)(fn_add-add0));
else
printf("%6i %-40s %8.4f\n",
total,"total",total/(double)(fn_add-add0));
fclose(map);
free(buf);
return EXIT_SUCCESS;
}