328 lines
8.1 KiB
C
328 lines
8.1 KiB
C
/*
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* readprofile.c - used to read /proc/profile
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*
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* Copyright (C) 1994,1996 Alessandro Rubini (rubini@ipvvis.unipv.it)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
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* - added Native Language Support
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* 1999-09-01 Stephane Eranian <eranian@cello.hpl.hp.com>
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* - 64bit clean patch
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* 3Feb2001 Andrew Morton <andrewm@uow.edu.au>
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* - -M option to write profile multiplier.
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* 2001-11-07 Werner Almesberger <wa@almesberger.net>
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* - byte order auto-detection and -n option
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* 2001-11-09 Werner Almesberger <wa@almesberger.net>
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* - skip step size (index 0)
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* 2002-03-09 John Levon <moz@compsoc.man.ac.uk>
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* - make maplineno do something
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "nls.h"
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#define RELEASE "2.0, May 1996"
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#define S_LEN 128
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static char *prgname;
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/* These are the defaults */
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static char defaultmap[]="/usr/src/linux/System.map";
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static char defaultpro[]="/proc/profile";
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static char optstring[]="M:m:np:itvarVb";
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static void
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usage(void) {
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fprintf(stderr,
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_("%s: Usage: \"%s [options]\n"
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"\t -m <mapfile> (default = \"%s\")\n"
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"\t -p <pro-file> (default = \"%s\")\n"
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"\t -M <mult> set the profiling multiplier to <mult>\n"
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"\t -i print only info about the sampling step\n"
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"\t -v print verbose data\n"
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"\t -a print all symbols, even if count is 0\n"
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"\t -b print individual histogram-bin counts\n"
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"\t -r reset all the counters (root only)\n"
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"\t -n disable byte order auto-detection\n"
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"\t -V print version and exit\n")
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,prgname,prgname,defaultmap,defaultpro);
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exit(1);
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}
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static void *
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xmalloc (size_t size) {
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void *t;
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if (size == 0)
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return NULL;
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t = malloc (size);
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if (t == NULL) {
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fprintf(stderr, _("out of memory"));
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exit(1);
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}
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return t;
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}
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static FILE *
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myopen(char *name, char *mode, int *flag) {
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int len = strlen(name);
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if (!strcmp(name+len-3,".gz")) {
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FILE *res;
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char *cmdline = xmalloc(len+6);
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sprintf(cmdline, "zcat %s", name);
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res = popen(cmdline,mode);
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free(cmdline);
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*flag = 1;
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return res;
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}
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*flag = 0;
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return fopen(name,mode);
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}
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int
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main (int argc, char **argv) {
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FILE *map;
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int proFd;
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char *mapFile, *proFile, *mult=0;
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unsigned long len=0, add0=0, indx=1;
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unsigned int step;
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unsigned int *buf, total, fn_len;
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unsigned long fn_add, next_add; /* current and next address */
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char fn_name[S_LEN], next_name[S_LEN]; /* current and next name */
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char mode[8];
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int c;
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int optAll=0, optInfo=0, optReset=0, optVerbose=0, optNative=0, optBins=0;
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char mapline[S_LEN];
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int maplineno=1;
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int popenMap; /* flag to tell if popen() has been used */
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int header_printed;
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#define next (current^1)
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setlocale(LC_ALL, "");
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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prgname=argv[0];
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proFile=defaultpro;
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mapFile=defaultmap;
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while ((c = getopt(argc,argv,optstring)) != -1) {
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switch(c) {
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case 'm': mapFile=optarg; break;
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case 'n': optNative++; break;
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case 'p': proFile=optarg; break;
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case 'a': optAll++; break;
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case 'b': optBins++; break;
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case 'i': optInfo++; break;
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case 'M': mult=optarg; break;
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case 'r': optReset++; break;
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case 'v': optVerbose++; break;
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case 'V': printf(_("%s Version %s\n"),prgname,RELEASE);
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exit(0);
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default: usage();
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}
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}
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if (optReset || mult) {
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int multiplier, fd, to_write;
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/*
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* When writing the multiplier, if the length of the write is
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* not sizeof(int), the multiplier is not changed
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*/
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if (mult) {
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multiplier = strtoul(mult, 0, 10);
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to_write = sizeof(int);
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} else {
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multiplier = 0;
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to_write = 1; /* sth different from sizeof(int) */
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}
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/* try to become root, just in case */
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setuid(0);
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fd = open(defaultpro,O_WRONLY);
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if (fd < 0) {
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perror(defaultpro);
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exit(1);
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}
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if (write(fd, &multiplier, to_write) != to_write) {
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fprintf(stderr, "readprofile: error writing %s: %s\n",
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defaultpro, strerror(errno));
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exit(1);
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}
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close(fd);
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exit(0);
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}
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/*
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* Use an fd for the profiling buffer, to skip stdio overhead
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*/
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if ( ((proFd=open(proFile,O_RDONLY)) < 0)
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|| ((int)(len=lseek(proFd,0,SEEK_END)) < 0)
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|| (lseek(proFd,0,SEEK_SET)<0) ) {
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fprintf(stderr,"%s: %s: %s\n",prgname,proFile,strerror(errno));
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exit(1);
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}
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if ( !(buf=malloc(len)) ) {
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fprintf(stderr,"%s: malloc(): %s\n",prgname, strerror(errno));
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exit(1);
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}
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if (read(proFd,buf,len) != len) {
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fprintf(stderr,"%s: %s: %s\n",prgname,proFile,strerror(errno));
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exit(1);
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}
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close(proFd);
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if (!optNative) {
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int entries = len/sizeof(*buf);
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int big = 0,small = 0,i;
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unsigned *p;
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for (p = buf+1; p < buf+entries; p++)
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if (*p) {
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if (*p >= 1 << (sizeof(*buf)/2)) big++;
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else small++;
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}
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if (big > small) {
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fprintf(stderr,"Assuming reversed byte order. "
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"Use -n to force native byte order.\n");
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for (p = buf; p < buf+entries; p++)
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for (i = 0; i < sizeof(*buf)/2; i++) {
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unsigned char *b = (unsigned char *) p;
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unsigned char tmp;
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tmp = b[i];
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b[i] = b[sizeof(*buf)-i-1];
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b[sizeof(*buf)-i-1] = tmp;
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}
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}
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}
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step=buf[0];
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if (optInfo) {
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printf(_("Sampling_step: %i\n"),step);
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exit(0);
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}
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total=0;
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if (!(map=myopen(mapFile,"r",&popenMap))) {
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fprintf(stderr,"%s: ",prgname);perror(mapFile);
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exit(1);
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}
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while (fgets(mapline,S_LEN,map)) {
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if (sscanf(mapline,"%lx %s %s",&fn_add,mode,fn_name) != 3) {
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fprintf(stderr,_("%s: %s(%i): wrong map line\n"),
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prgname, mapFile, maplineno);
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exit(1);
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}
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if (!strcmp(fn_name,"_stext")) /* only elf works like this */ {
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add0 = fn_add;
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break;
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}
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maplineno++;
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}
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if (!add0) {
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fprintf(stderr,_("%s: can't find \"_stext\" in %s\n"),
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prgname, mapFile);
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exit(1);
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}
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/*
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* Main loop.
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*/
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while (fgets(mapline,S_LEN,map)) {
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unsigned int this=0;
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if (sscanf(mapline,"%lx %s %s",&next_add,mode,next_name)!=3) {
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fprintf(stderr,_("%s: %s(%i): wrong map line\n"),
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prgname,mapFile, maplineno);
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exit(1);
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}
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header_printed = 0;
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/* ignore any LEADING (before a '[tT]' symbol is found)
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Absolute symbols */
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if (*mode == 'A' && total == 0) continue;
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if (*mode != 'T' && *mode != 't' &&
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*mode != 'W' && *mode != 'w')
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break; /* only text is profiled */
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if (indx >= len / sizeof(*buf)) {
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fprintf(stderr, _("%s: profile address out of range. "
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"Wrong map file?\n"), prgname);
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exit(1);
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}
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while (indx < (next_add-add0)/step) {
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if (optBins && (buf[indx] || optAll)) {
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if (!header_printed) {
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printf ("%s:\n", fn_name);
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header_printed = 1;
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}
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printf ("\t%lx\t%u\n", (indx - 1)*step + add0, buf[indx]);
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}
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this += buf[indx++];
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}
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total += this;
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if (optBins) {
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if (optVerbose || this > 0)
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printf (" total\t\t\t\t%u\n", this);
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} else {
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fn_len = next_add-fn_add;
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if (fn_len && (this || optAll)) {
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if (optVerbose)
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printf("%08lx %-40s %6i %8.4f\n", fn_add,
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fn_name,this,this/(double)fn_len);
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else
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printf("%6i %-40s %8.4f\n",
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this,fn_name,this/(double)fn_len);
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}
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}
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fn_add=next_add; strcpy(fn_name,next_name);
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maplineno++;
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}
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/* trailer */
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if (optVerbose)
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printf("%08x %-40s %6i %8.4f\n",
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0,"total",total,total/(double)(fn_add-add0));
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else
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printf("%6i %-40s %8.4f\n",
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total,_("total"),total/(double)(fn_add-add0));
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popenMap ? pclose(map) : fclose(map);
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exit(0);
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}
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