diff options
| -rw-r--r-- | include/applets.h | 3 | ||||
| -rw-r--r-- | include/usage.h | 15 | ||||
| -rw-r--r-- | util-linux/Config.in | 6 | ||||
| -rw-r--r-- | util-linux/Makefile.in | 1 | ||||
| -rw-r--r-- | util-linux/readprofile.c | 302 |
5 files changed, 327 insertions, 0 deletions
diff --git a/include/applets.h b/include/applets.h index 4ef5ed7..6aa67f5 100644 --- a/include/applets.h +++ b/include/applets.h @@ -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 diff --git a/include/usage.h b/include/usage.h index d634985..ae858bd 100644 --- a/include/usage.h +++ b/include/usage.h @@ -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 \ diff --git a/util-linux/Config.in b/util-linux/Config.in index c47a42d..3c990b9 100644 --- a/util-linux/Config.in +++ b/util-linux/Config.in @@ -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 diff --git a/util-linux/Makefile.in b/util-linux/Makefile.in index 2747b4f..9aaaf9f 100644 --- a/util-linux/Makefile.in +++ b/util-linux/Makefile.in @@ -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) diff --git a/util-linux/readprofile.c b/util-linux/readprofile.c new file mode 100644 index 0000000..9563580 --- /dev/null +++ b/util-linux/readprofile.c @@ -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 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 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; +} |