mirror of
https://github.com/sheumann/hush.git
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instead of xmalloc_open_read_close. function old new delta xmalloc_xopen_read_close - 34 +34 xmalloc_open_read_close 163 171 +8 passwd_main 1070 1074 +4 rexecve 254 257 +3 handle_incoming_and_exit 2657 2659 +2 parse_command 1509 1510 +1 buffer_fill_and_print 76 73 -3 evaltreenr 599 589 -10 evaltree 599 589 -10 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 5/3 up/down: 52/-23) Total: 29 bytes
248 lines
6.3 KiB
C
248 lines
6.3 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* readprofile.c - used to read /proc/profile
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*
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* Copyright (C) 1994,1996 Alessandro Rubini (rubini@ipvvis.unipv.it)
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/*
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* 1999-02-22 Arkadiusz Mickiewicz <misiek@pld.ORG.PL>
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* - added Native Language Support
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* 1999-09-01 Stephane Eranian <eranian@cello.hpl.hp.com>
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* - 64bit clean patch
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* 3Feb2001 Andrew Morton <andrewm@uow.edu.au>
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* - -M option to write profile multiplier.
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* 2001-11-07 Werner Almesberger <wa@almesberger.net>
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* - byte order auto-detection and -n option
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* 2001-11-09 Werner Almesberger <wa@almesberger.net>
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* - skip step size (index 0)
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* 2002-03-09 John Levon <moz@compsoc.man.ac.uk>
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* - make maplineno do something
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* 2002-11-28 Mads Martin Joergensen +
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* - also try /boot/System.map-`uname -r`
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* 2003-04-09 Werner Almesberger <wa@almesberger.net>
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* - fixed off-by eight error and improved heuristics in byte order detection
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* 2003-08-12 Nikita Danilov <Nikita@Namesys.COM>
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* - added -s option; example of use:
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* "readprofile -s -m /boot/System.map-test | grep __d_lookup | sort -n -k3"
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*
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* Taken from util-linux and adapted for busybox by
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* Paul Mundt <lethal@linux-sh.org>.
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*/
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#include "libbb.h"
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#include <sys/utsname.h>
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#define S_LEN 128
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/* These are the defaults */
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static const char defaultmap[] ALIGN1 = "/boot/System.map";
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static const char defaultpro[] ALIGN1 = "/proc/profile";
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int readprofile_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int readprofile_main(int argc ATTRIBUTE_UNUSED, char **argv)
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{
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FILE *map;
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const char *mapFile, *proFile;
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unsigned long indx = 1;
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size_t len;
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uint64_t add0 = 0;
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unsigned int step;
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unsigned int *buf, total, fn_len;
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unsigned long long fn_add, next_add; /* current and next address */
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char fn_name[S_LEN], next_name[S_LEN]; /* current and next name */
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char mapline[S_LEN];
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char mode[8];
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int maplineno = 1;
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int header_printed;
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int multiplier = 0;
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unsigned opt;
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enum {
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OPT_M = (1 << 0),
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OPT_m = (1 << 1),
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OPT_p = (1 << 2),
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OPT_n = (1 << 3),
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OPT_a = (1 << 4),
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OPT_b = (1 << 5),
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OPT_s = (1 << 6),
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OPT_i = (1 << 7),
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OPT_r = (1 << 8),
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OPT_v = (1 << 9),
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};
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#define optMult (opt & OPT_M)
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#define optNative (opt & OPT_n)
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#define optAll (opt & OPT_a)
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#define optBins (opt & OPT_b)
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#define optSub (opt & OPT_s)
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#define optInfo (opt & OPT_i)
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#define optReset (opt & OPT_r)
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#define optVerbose (opt & OPT_v)
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#define next (current^1)
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proFile = defaultpro;
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mapFile = defaultmap;
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opt_complementary = "M+"; /* -M N */
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opt = getopt32(argv, "M:m:p:nabsirv", &multiplier, &mapFile, &proFile);
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if (opt & (OPT_M|OPT_r)) { /* mult or reset, or both */
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int fd, to_write;
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/*
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* When writing the multiplier, if the length of the write is
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* not sizeof(int), the multiplier is not changed
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*/
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to_write = sizeof(int);
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if (!optMult)
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to_write = 1; /* sth different from sizeof(int) */
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fd = xopen(defaultpro, O_WRONLY);
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xwrite(fd, &multiplier, to_write);
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close(fd);
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return EXIT_SUCCESS;
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}
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/*
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* Use an fd for the profiling buffer, to skip stdio overhead
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*/
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len = MAXINT(ssize_t);
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buf = xmalloc_xopen_read_close(proFile, &len);
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if (!optNative) {
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int entries = len / sizeof(*buf);
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int big = 0, small = 0, i;
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unsigned *p;
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for (p = buf+1; p < buf+entries; p++) {
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if (*p & ~0U << (sizeof(*buf)*4))
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big++;
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if (*p & ((1 << (sizeof(*buf)*4))-1))
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small++;
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}
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if (big > small) {
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bb_error_msg("assuming reversed byte order, "
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"use -n to force native byte order");
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for (p = buf; p < buf+entries; p++)
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for (i = 0; i < sizeof(*buf)/2; i++) {
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unsigned char *b = (unsigned char *) p;
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unsigned char tmp;
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tmp = b[i];
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b[i] = b[sizeof(*buf)-i-1];
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b[sizeof(*buf)-i-1] = tmp;
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}
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}
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}
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step = buf[0];
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if (optInfo) {
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printf("Sampling_step: %i\n", step);
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return EXIT_SUCCESS;
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}
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total = 0;
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map = xfopen(mapFile, "r");
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while (fgets(mapline, S_LEN, map)) {
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if (sscanf(mapline, "%llx %s %s", &fn_add, mode, fn_name) != 3)
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bb_error_msg_and_die("%s(%i): wrong map line",
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mapFile, maplineno);
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if (!strcmp(fn_name, "_stext")) /* only elf works like this */ {
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add0 = fn_add;
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break;
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}
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maplineno++;
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}
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if (!add0)
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bb_error_msg_and_die("can't find \"_stext\" in %s", mapFile);
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/*
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* Main loop.
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*/
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while (fgets(mapline, S_LEN, map)) {
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unsigned int this = 0;
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if (sscanf(mapline, "%llx %s %s", &next_add, mode, next_name) != 3)
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bb_error_msg_and_die("%s(%i): wrong map line",
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mapFile, maplineno);
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header_printed = 0;
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/* ignore any LEADING (before a '[tT]' symbol is found)
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Absolute symbols */
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if ((*mode == 'A' || *mode == '?') && total == 0) continue;
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if (*mode != 'T' && *mode != 't' &&
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*mode != 'W' && *mode != 'w')
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break; /* only text is profiled */
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if (indx >= len / sizeof(*buf))
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bb_error_msg_and_die("profile address out of range. "
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"Wrong map file?");
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while (indx < (next_add-add0)/step) {
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if (optBins && (buf[indx] || optAll)) {
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if (!header_printed) {
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printf("%s:\n", fn_name);
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header_printed = 1;
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}
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printf("\t%"PRIx64"\t%u\n", (indx - 1)*step + add0, buf[indx]);
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}
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this += buf[indx++];
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}
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total += this;
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if (optBins) {
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if (optVerbose || this > 0)
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printf(" total\t\t\t\t%u\n", this);
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} else if ((this || optAll)
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&& (fn_len = next_add-fn_add) != 0
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) {
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if (optVerbose)
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printf("%016llx %-40s %6i %8.4f\n", fn_add,
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fn_name, this, this/(double)fn_len);
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else
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printf("%6i %-40s %8.4f\n",
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this, fn_name, this/(double)fn_len);
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if (optSub) {
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unsigned long long scan;
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for (scan = (fn_add-add0)/step + 1;
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scan < (next_add-add0)/step; scan++) {
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unsigned long long addr;
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addr = (scan - 1)*step + add0;
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printf("\t%#llx\t%s+%#llx\t%u\n",
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addr, fn_name, addr - fn_add,
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buf[scan]);
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}
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}
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}
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fn_add = next_add;
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strcpy(fn_name, next_name);
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maplineno++;
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}
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/* clock ticks, out of kernel text - probably modules */
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printf("%6i %s\n", buf[len/sizeof(*buf)-1], "*unknown*");
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/* trailer */
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if (optVerbose)
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printf("%016x %-40s %6i %8.4f\n",
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0, "total", total, total/(double)(fn_add-add0));
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else
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printf("%6i %-40s %8.4f\n",
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total, "total", total/(double)(fn_add-add0));
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fclose(map);
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free(buf);
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return EXIT_SUCCESS;
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}
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