source: MondoRescue/trunk/mindi-busybox/util-linux/readprofile.c@ 956

Last change on this file since 956 was 904, checked in by Bruno Cornec, 17 years ago

merge -r890:902 $SVN_M/branches/stable
File size: 7.2 KB
RevLine 
[821]1/*
2 * readprofile.c - used to read /proc/profile
3 *
4 * Copyright (C) 1994,1996 Alessandro Rubini (rubini@ipvvis.unipv.it)
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21/*
22 * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
23 * - added Native Language Support
24 * 1999-09-01 Stephane Eranian <eranian@cello.hpl.hp.com>
25 * - 64bit clean patch
26 * 3Feb2001 Andrew Morton <andrewm@uow.edu.au>
27 * - -M option to write profile multiplier.
28 * 2001-11-07 Werner Almesberger <wa@almesberger.net>
29 * - byte order auto-detection and -n option
30 * 2001-11-09 Werner Almesberger <wa@almesberger.net>
31 * - skip step size (index 0)
32 * 2002-03-09 John Levon <moz@compsoc.man.ac.uk>
33 * - make maplineno do something
34 * 2002-11-28 Mads Martin Joergensen +
35 * - also try /boot/System.map-`uname -r`
36 * 2003-04-09 Werner Almesberger <wa@almesberger.net>
37 * - fixed off-by eight error and improved heuristics in byte order detection
38 * 2003-08-12 Nikita Danilov <Nikita@Namesys.COM>
39 * - added -s option; example of use:
40 * "readprofile -s -m /boot/System.map-test | grep __d_lookup | sort -n -k3"
41 *
42 * Taken from util-linux and adapted for busybox by
43 * Paul Mundt <lethal@linux-sh.org>.
44 */
45
46#include <errno.h>
47#include <stdio.h>
48#include <fcntl.h>
49#include <stdlib.h>
50#include <unistd.h>
51#include <string.h>
52#include <sys/types.h>
53#include <sys/stat.h>
54#include <sys/utsname.h>
55
56#include "busybox.h"
57
58#define S_LEN 128
59
60/* These are the defaults */
61static const char defaultmap[]="/boot/System.map";
62static const char defaultpro[]="/proc/profile";
63
64int readprofile_main(int argc, char **argv)
65{
66 FILE *map;
67 int proFd;
68 const char *mapFile, *proFile, *mult=0;
69 unsigned long len=0, indx=1;
[904]70 uint64_t add0=0;
[821]71 unsigned int step;
72 unsigned int *buf, total, fn_len;
73 unsigned long long fn_add, next_add; /* current and next address */
74 char fn_name[S_LEN], next_name[S_LEN]; /* current and next name */
75 char mode[8];
76 int c;
77 int optAll=0, optInfo=0, optReset=0, optVerbose=0, optNative=0;
78 int optBins=0, optSub=0;
79 char mapline[S_LEN];
80 int maplineno=1;
81 int header_printed;
82
83#define next (current^1)
84
85 proFile = defaultpro;
86 mapFile = defaultmap;
87
88 while ((c = getopt(argc, argv, "M:m:np:itvarVbs")) != -1) {
89 switch(c) {
90 case 'm':
91 mapFile = optarg;
92 break;
93 case 'n':
94 optNative++;
95 break;
96 case 'p':
97 proFile = optarg;
98 break;
99 case 'a':
100 optAll++;
101 break;
102 case 'b':
103 optBins++;
104 break;
105 case 's':
106 optSub++;
107 break;
108 case 'i':
109 optInfo++;
110 break;
111 case 'M':
112 mult = optarg;
113 break;
114 case 'r':
115 optReset++;
116 break;
117 case 'v':
118 optVerbose++;
119 break;
120 default:
121 bb_show_usage();
122 }
123 }
124
125 if (optReset || mult) {
126 int multiplier, fd, to_write;
127
128 /*
129 * When writing the multiplier, if the length of the write is
130 * not sizeof(int), the multiplier is not changed
131 */
132 if (mult) {
133 multiplier = strtoul(mult, 0, 10);
134 to_write = sizeof(int);
135 } else {
136 multiplier = 0;
137 to_write = 1; /* sth different from sizeof(int) */
138 }
139
140 fd = bb_xopen(defaultpro,O_WRONLY);
141
142 if (write(fd, &multiplier, to_write) != to_write)
143 bb_perror_msg_and_die("error writing %s", defaultpro);
144
145 close(fd);
146 return EXIT_SUCCESS;
147 }
148
149 /*
150 * Use an fd for the profiling buffer, to skip stdio overhead
151 */
152
153 proFd = bb_xopen(proFile,O_RDONLY);
154
155 if (((int)(len=lseek(proFd,0,SEEK_END)) < 0)
156 || (lseek(proFd,0,SEEK_SET) < 0))
157 bb_perror_msg_and_die(proFile);
158
159 buf = xmalloc(len);
160
161 if (read(proFd,buf,len) != len)
162 bb_perror_msg_and_die(proFile);
163
164 close(proFd);
165
166 if (!optNative) {
167 int entries = len/sizeof(*buf);
168 int big = 0,small = 0,i;
169 unsigned *p;
170
171 for (p = buf+1; p < buf+entries; p++) {
172 if (*p & ~0U << (sizeof(*buf)*4))
173 big++;
174 if (*p & ((1 << (sizeof(*buf)*4))-1))
175 small++;
176 }
177 if (big > small) {
178 bb_error_msg("Assuming reversed byte order. "
179 "Use -n to force native byte order.");
180 for (p = buf; p < buf+entries; p++)
181 for (i = 0; i < sizeof(*buf)/2; i++) {
182 unsigned char *b = (unsigned char *) p;
183 unsigned char tmp;
184
185 tmp = b[i];
186 b[i] = b[sizeof(*buf)-i-1];
187 b[sizeof(*buf)-i-1] = tmp;
188 }
189 }
190 }
191
192 step = buf[0];
193 if (optInfo) {
194 printf("Sampling_step: %i\n", step);
195 return EXIT_SUCCESS;
196 }
197
198 total = 0;
199
200 map = bb_xfopen(mapFile, "r");
201
202 while (fgets(mapline,S_LEN,map)) {
203 if (sscanf(mapline,"%llx %s %s",&fn_add,mode,fn_name) != 3)
204 bb_error_msg_and_die("%s(%i): wrong map line",
205 mapFile, maplineno);
206
207 if (!strcmp(fn_name,"_stext")) /* only elf works like this */ {
208 add0 = fn_add;
209 break;
210 }
211 maplineno++;
212 }
213
214 if (!add0)
215 bb_error_msg_and_die("can't find \"_stext\" in %s", mapFile);
216
217 /*
218 * Main loop.
219 */
220 while (fgets(mapline,S_LEN,map)) {
221 unsigned int this = 0;
222
223 if (sscanf(mapline,"%llx %s %s",&next_add,mode,next_name) != 3)
224 bb_error_msg_and_die("%s(%i): wrong map line",
225 mapFile, maplineno);
226
227 header_printed = 0;
228
229 /* ignore any LEADING (before a '[tT]' symbol is found)
230 Absolute symbols */
231 if ((*mode == 'A' || *mode == '?') && total == 0) continue;
232 if (*mode != 'T' && *mode != 't' &&
233 *mode != 'W' && *mode != 'w')
234 break; /* only text is profiled */
235
236 if (indx >= len / sizeof(*buf))
237 bb_error_msg_and_die("profile address out of range. "
238 "Wrong map file?");
239
240 while (indx < (next_add-add0)/step) {
241 if (optBins && (buf[indx] || optAll)) {
242 if (!header_printed) {
243 printf ("%s:\n", fn_name);
244 header_printed = 1;
245 }
[904]246 printf ("\t%"PRIx64"\t%u\n", (indx - 1)*step + add0, buf[indx]);
[821]247 }
248 this += buf[indx++];
249 }
250 total += this;
251
252 if (optBins) {
253 if (optVerbose || this > 0)
254 printf (" total\t\t\t\t%u\n", this);
255 } else if ((this || optAll) &&
256 (fn_len = next_add-fn_add) != 0) {
257 if (optVerbose)
258 printf("%016llx %-40s %6i %8.4f\n", fn_add,
259 fn_name,this,this/(double)fn_len);
260 else
261 printf("%6i %-40s %8.4f\n",
262 this,fn_name,this/(double)fn_len);
263 if (optSub) {
264 unsigned long long scan;
265
266 for (scan = (fn_add-add0)/step + 1;
267 scan < (next_add-add0)/step; scan++) {
268 unsigned long long addr;
269
270 addr = (scan - 1)*step + add0;
271 printf("\t%#llx\t%s+%#llx\t%u\n",
272 addr, fn_name, addr - fn_add,
273 buf[scan]);
274 }
275 }
276 }
277
278 fn_add = next_add;
279 strcpy(fn_name,next_name);
280
281 maplineno++;
282 }
283
284 /* clock ticks, out of kernel text - probably modules */
285 printf("%6i %s\n", buf[len/sizeof(*buf)-1], "*unknown*");
286
287 /* trailer */
288 if (optVerbose)
289 printf("%016x %-40s %6i %8.4f\n",
290 0,"total",total,total/(double)(fn_add-add0));
291 else
292 printf("%6i %-40s %8.4f\n",
293 total,"total",total/(double)(fn_add-add0));
294
295 fclose(map);
296 free(buf);
297
298 return EXIT_SUCCESS;
299}
Note: See TracBrowser for help on using the repository browser.