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-rw-r--r--util-linux/readprofile.c302
1 files changed, 302 insertions, 0 deletions
diff --git a/util-linux/readprofile.c b/util-linux/readprofile.c
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+/*
+ * 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;
+}
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