405 lines
9.8 KiB
C
405 lines
9.8 KiB
C
/*
|
|
* 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 Mi¶kiewicz <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"
|
|
*/
|
|
|
|
#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 "xalloc.h"
|
|
#include "nls.h"
|
|
|
|
#define S_LEN 128
|
|
|
|
static char *prgname;
|
|
|
|
/* These are the defaults */
|
|
static char defaultmap[]="/boot/System.map";
|
|
static char defaultpro[]="/proc/profile";
|
|
static char optstring[]="M:m:np:itvarVbs";
|
|
|
|
static FILE *
|
|
myopen(char *name, char *mode, int *flag) {
|
|
int len = strlen(name);
|
|
|
|
if (!strcmp(name+len-3,".gz")) {
|
|
FILE *res;
|
|
char *cmdline = xmalloc(len+6);
|
|
sprintf(cmdline, "zcat %s", name);
|
|
res = popen(cmdline,mode);
|
|
free(cmdline);
|
|
*flag = 1;
|
|
return res;
|
|
}
|
|
*flag = 0;
|
|
return fopen(name,mode);
|
|
}
|
|
|
|
#ifndef BOOT_SYSTEM_MAP
|
|
#define BOOT_SYSTEM_MAP "/boot/System.map-"
|
|
#endif
|
|
|
|
static char *
|
|
boot_uname_r_str(void) {
|
|
struct utsname uname_info;
|
|
char *s;
|
|
size_t len;
|
|
|
|
if (uname(&uname_info))
|
|
return "";
|
|
len = strlen(BOOT_SYSTEM_MAP) + strlen(uname_info.release) + 1;
|
|
s = xmalloc(len);
|
|
strcpy(s, BOOT_SYSTEM_MAP);
|
|
strcat(s, uname_info.release);
|
|
return s;
|
|
}
|
|
|
|
static void
|
|
usage(void) {
|
|
fprintf(stderr, _(
|
|
"%s: Usage: \"%s [options]\n"
|
|
"\t -m <mapfile> (defaults: \"%s\" and\n\t\t\t\t \"%s\")\n"
|
|
"\t -p <pro-file> (default: \"%s\")\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\n"
|
|
"\t -V print version and exit\n"),
|
|
prgname, prgname, defaultmap, boot_uname_r_str(), defaultpro);
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv) {
|
|
FILE *map;
|
|
int proFd;
|
|
char *mapFile, *proFile, *mult=0;
|
|
size_t 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;
|
|
ssize_t rc;
|
|
int optAll=0, optInfo=0, optReset=0, optVerbose=0, optNative=0;
|
|
int optBins=0, optSub=0;
|
|
char mapline[S_LEN];
|
|
int maplineno=1;
|
|
int popenMap; /* flag to tell if popen() has been used */
|
|
int header_printed;
|
|
|
|
#define next (current^1)
|
|
|
|
setlocale(LC_ALL, "");
|
|
bindtextdomain(PACKAGE, LOCALEDIR);
|
|
textdomain(PACKAGE);
|
|
|
|
prgname = argv[0];
|
|
proFile = defaultpro;
|
|
mapFile = defaultmap;
|
|
|
|
while ((c = getopt(argc, argv, optstring)) != -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;
|
|
case 'V':
|
|
printf(_("%s (%s)\n"), prgname,
|
|
PACKAGE_STRING);
|
|
exit(0);
|
|
default:
|
|
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) */
|
|
}
|
|
/* try to become root, just in case */
|
|
setuid(0);
|
|
fd = open(defaultpro,O_WRONLY);
|
|
if (fd < 0) {
|
|
perror(defaultpro);
|
|
exit(1);
|
|
}
|
|
if (write(fd, &multiplier, to_write) != to_write) {
|
|
fprintf(stderr, _("readprofile: error writing %s: %m\n"),
|
|
defaultpro);
|
|
exit(1);
|
|
}
|
|
close(fd);
|
|
exit(0);
|
|
}
|
|
|
|
/*
|
|
* Use an fd for the profiling buffer, to skip stdio overhead
|
|
*/
|
|
if (((proFd=open(proFile,O_RDONLY)) < 0)
|
|
|| ((int)(len=lseek(proFd,0,SEEK_END)) < 0)
|
|
|| (lseek(proFd,0,SEEK_SET) < 0)) {
|
|
fprintf(stderr,"%s: %s: %m\n", prgname, proFile);
|
|
exit(1);
|
|
}
|
|
|
|
buf = xmalloc(len);
|
|
|
|
rc = read(proFd,buf,len);
|
|
if (rc < 0 || (size_t) rc != len) {
|
|
fprintf(stderr,"%s: %s: %m\n", prgname, proFile);
|
|
exit(1);
|
|
}
|
|
close(proFd);
|
|
|
|
if (!optNative) {
|
|
int entries = len/sizeof(*buf);
|
|
int big = 0,small = 0;
|
|
unsigned *p;
|
|
size_t i;
|
|
|
|
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);
|
|
exit(0);
|
|
}
|
|
|
|
total = 0;
|
|
|
|
map = myopen(mapFile, "r", &popenMap);
|
|
if (map == NULL && mapFile == defaultmap) {
|
|
mapFile = boot_uname_r_str();
|
|
map = myopen(mapFile, "r", &popenMap);
|
|
}
|
|
if (map == NULL) {
|
|
int errsv = errno;
|
|
fprintf(stderr, "%s: ", prgname);
|
|
errno = errsv;
|
|
perror(mapFile);
|
|
exit(1);
|
|
}
|
|
|
|
while (fgets(mapline,S_LEN,map)) {
|
|
if (sscanf(mapline,"%llx %s %s",&fn_add,mode,fn_name) != 3) {
|
|
fprintf(stderr,_("%s: %s(%i): wrong map line\n"),
|
|
prgname, mapFile, maplineno);
|
|
exit(1);
|
|
}
|
|
/* only elf works like this */
|
|
if (!strcmp(fn_name,"_stext") || !strcmp(fn_name,"__stext")) {
|
|
add0 = fn_add;
|
|
break;
|
|
}
|
|
maplineno++;
|
|
}
|
|
|
|
if (!add0) {
|
|
fprintf(stderr,_("%s: can't find \"_stext\" in %s\n"),
|
|
prgname, mapFile);
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* Main loop.
|
|
*/
|
|
while (fgets(mapline,S_LEN,map)) {
|
|
unsigned int this=0;
|
|
int done = 0;
|
|
|
|
if (sscanf(mapline,"%llx %s %s",&next_add,mode,next_name)!=3) {
|
|
fprintf(stderr,_("%s: %s(%i): wrong map line\n"),
|
|
prgname,mapFile, maplineno);
|
|
exit(1);
|
|
}
|
|
header_printed = 0;
|
|
|
|
/* the kernel only profiles up to _etext */
|
|
if (!strcmp(next_name, "_etext") ||
|
|
!strcmp(next_name, "__etext"))
|
|
done = 1;
|
|
else {
|
|
/* ignore any LEADING (before a '[tT]' symbol is found)
|
|
Absolute symbols and __init_end because some
|
|
architectures place it before .text section */
|
|
if ((*mode == 'A' || *mode == '?')
|
|
&& (total == 0 || !strcmp(next_name, "__init_end")))
|
|
continue;
|
|
if (*mode != 'T' && *mode != 't' &&
|
|
*mode != 'W' && *mode != 'w')
|
|
break; /* only text is profiled */
|
|
}
|
|
|
|
if (indx >= len / sizeof(*buf)) {
|
|
fprintf(stderr, _("%s: profile address out of range. "
|
|
"Wrong map file?\n"), prgname);
|
|
exit(1);
|
|
}
|
|
|
|
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++;
|
|
if (done)
|
|
break;
|
|
}
|
|
|
|
/* 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));
|
|
|
|
popenMap ? pclose(map) : fclose(map);
|
|
exit(0);
|
|
}
|