Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 | /* vi: set sw=4 ts=4: */ /* * readprofile.c - used to read /proc/profile * * Copyright (C) 1994,1996 Alessandro Rubini (rubini@ipvvis.unipv.it) * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ /* * 1999-02-22 Arkadiusz Mickiewicz <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 "libbb.h" #include <sys/utsname.h> #define S_LEN 128 /* These are the defaults */ static const char defaultmap[] ALIGN1 = "/boot/System.map"; static const char defaultpro[] ALIGN1 = "/proc/profile"; int readprofile_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int readprofile_main(int argc UNUSED_PARAM, char **argv) { FILE *map; const char *mapFile, *proFile; unsigned long indx = 1; size_t len; uint64_t 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 mapline[S_LEN]; char mode[8]; int maplineno = 1; int header_printed; int multiplier = 0; unsigned opt; enum { OPT_M = (1 << 0), OPT_m = (1 << 1), OPT_p = (1 << 2), OPT_n = (1 << 3), OPT_a = (1 << 4), OPT_b = (1 << 5), OPT_s = (1 << 6), OPT_i = (1 << 7), OPT_r = (1 << 8), OPT_v = (1 << 9), }; #define optMult (opt & OPT_M) #define optNative (opt & OPT_n) #define optAll (opt & OPT_a) #define optBins (opt & OPT_b) #define optSub (opt & OPT_s) #define optInfo (opt & OPT_i) #define optReset (opt & OPT_r) #define optVerbose (opt & OPT_v) #define next (current^1) proFile = defaultpro; mapFile = defaultmap; opt_complementary = "M+"; /* -M N */ opt = getopt32(argv, "M:m:p:nabsirv", &multiplier, &mapFile, &proFile); if (opt & (OPT_M|OPT_r)) { /* mult or reset, or both */ int fd, to_write; /* * When writing the multiplier, if the length of the write is * not sizeof(int), the multiplier is not changed */ to_write = sizeof(int); if (!optMult) to_write = 1; /* sth different from sizeof(int) */ fd = xopen(defaultpro, O_WRONLY); xwrite(fd, &multiplier, to_write); close(fd); return EXIT_SUCCESS; } /* * Use an fd for the profiling buffer, to skip stdio overhead */ len = MAXINT(ssize_t); buf = xmalloc_xopen_read_close(proFile, &len); 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 = xfopen_for_read(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", 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%"PRIx64"\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; } |