| /* vi: set sw=4 ts=4: */ |
| /* |
| * 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" |
| * |
| * 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 const char defaultmap[]="/boot/System.map"; |
| static const char defaultpro[]="/proc/profile"; |
| |
| int readprofile_main(int argc, char **argv) |
| { |
| FILE *map; |
| int proFd; |
| const 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 (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 |
| */ |
| |
| proFd = bb_xopen(proFile,O_RDONLY); |
| |
| if (((int)(len=lseek(proFd,0,SEEK_END)) < 0) |
| || (lseek(proFd,0,SEEK_SET) < 0)) |
| bb_perror_msg_and_die(proFile); |
| |
| buf = xmalloc(len); |
| |
| 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) { |
| bb_error_msg("Assuming reversed byte order. " |
| "Use -n to force native byte order."); |
| 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"); |
| |
| 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", 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", |
| 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; |
| } |