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-rw-r--r--sys-utils/readprofile.c415
1 files changed, 415 insertions, 0 deletions
diff --git a/sys-utils/readprofile.c b/sys-utils/readprofile.c
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+++ b/sys-utils/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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*
+ * 1999-02-22 Arkadiusz Miśkiewicz <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"
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/utsname.h>
+#include <unistd.h>
+
+#include "c.h"
+#include "strutils.h"
+#include "nls.h"
+#include "xalloc.h"
+#include "closestream.h"
+
+#define S_LEN 128
+
+/* These are the defaults */
+static char defaultmap[]="/boot/System.map";
+static char defaultpro[]="/proc/profile";
+
+static FILE *myopen(char *name, char *mode, int *flag)
+{
+ int len = strlen(name);
+
+ if (!strcmp(name + len - 3, ".gz")) {
+ FILE *res;
+ char *cmdline = xmalloc(len + 6);
+ snprintf(cmdline, len + 6, "zcat %s", name);
+ res = popen(cmdline, mode);
+ free(cmdline);
+ *flag = 1;
+ return res;
+ }
+ *flag = 0;
+ return fopen(name, mode);
+}
+
+#ifndef BOOT_SYSTEM_MAP
+#define BOOT_SYSTEM_MAP "/boot/System.map-"
+#endif
+
+static char *boot_uname_r_str(void)
+{
+ struct utsname uname_info;
+ char *s;
+ size_t len;
+
+ if (uname(&uname_info))
+ return "";
+ len = strlen(BOOT_SYSTEM_MAP) + strlen(uname_info.release) + 1;
+ s = xmalloc(len);
+ strcpy(s, BOOT_SYSTEM_MAP);
+ strcat(s, uname_info.release);
+ return s;
+}
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ FILE *out = stdout;
+ fputs(USAGE_HEADER, out);
+ fprintf(out, _(" %s [options]\n"), program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, out);
+ fputs(_("Display kernel profiling information.\n"), out);
+
+ fputs(USAGE_OPTIONS, out);
+ fprintf(out,
+ _(" -m, --mapfile <mapfile> (defaults: \"%s\" and\n"), defaultmap);
+ fprintf(out,
+ _(" \"%s\")\n"), boot_uname_r_str());
+ fprintf(out,
+ _(" -p, --profile <pro-file> (default: \"%s\")\n"), defaultpro);
+ fputs(_(" -M, --multiplier <mult> set the profiling multiplier to <mult>\n"), out);
+ fputs(_(" -i, --info print only info about the sampling step\n"), out);
+ fputs(_(" -v, --verbose print verbose data\n"), out);
+ fputs(_(" -a, --all print all symbols, even if count is 0\n"), out);
+ fputs(_(" -b, --histbin print individual histogram-bin counts\n"), out);
+ fputs(_(" -s, --counters print individual counters within functions\n"), out);
+ fputs(_(" -r, --reset reset all the counters (root only)\n"), out);
+ fputs(_(" -n, --no-auto disable byte order auto-detection\n"), out);
+ fputs(USAGE_SEPARATOR, out);
+ printf(USAGE_HELP_OPTIONS(27));
+ printf(USAGE_MAN_TAIL("readprofile(8)"));
+ exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char **argv)
+{
+ FILE *map;
+ int proFd, has_mult = 0, multiplier = 0;
+ char *mapFile, *proFile;
+ size_t len = 0, indx = 1;
+ unsigned long long add0 = 0;
+ unsigned int step;
+ unsigned int *buf, total, fn_len;
+ unsigned long long fn_add = 0, next_add; /* current and next address */
+ char fn_name[S_LEN], next_name[S_LEN]; /* current and next name */
+ char mode[8];
+ int c;
+ ssize_t rc;
+ int optAll = 0, optInfo = 0, optReset = 0, optVerbose = 0, optNative = 0;
+ int optBins = 0, optSub = 0;
+ char mapline[S_LEN];
+ int maplineno = 1;
+ int popenMap; /* flag to tell if popen() has been used */
+ int header_printed;
+ double rep = 0;
+
+ static const struct option longopts[] = {
+ {"mapfile", required_argument, NULL, 'm'},
+ {"profile", required_argument, NULL, 'p'},
+ {"multiplier", required_argument, NULL, 'M'},
+ {"info", no_argument, NULL, 'i'},
+ {"verbose", no_argument, NULL, 'v'},
+ {"all", no_argument, NULL, 'a'},
+ {"histbin", no_argument, NULL, 'b'},
+ {"counters", no_argument, NULL, 's'},
+ {"reset", no_argument, NULL, 'r'},
+ {"no-auto", no_argument, NULL, 'n'},
+ {"version", no_argument, NULL, 'V'},
+ {"help", no_argument, NULL, 'h'},
+ {NULL, 0, NULL, 0}
+ };
+
+#define next (current^1)
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ close_stdout_atexit();
+
+ proFile = defaultpro;
+ mapFile = defaultmap;
+
+ while ((c = getopt_long(argc, argv, "m:p:M:ivabsrnVh", longopts, NULL)) != -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':
+ multiplier = strtol_or_err(optarg, _("failed to parse multiplier"));
+ has_mult = 1;
+ break;
+ case 'r':
+ optReset++;
+ break;
+ case 'v':
+ optVerbose++;
+ break;
+
+ case 'V':
+ print_version(EXIT_SUCCESS);
+ case 'h':
+ usage();
+ default:
+ errtryhelp(EXIT_FAILURE);
+ }
+ }
+
+ if (optReset || has_mult) {
+ int fd, to_write;
+
+ /* When writing the multiplier, if the length of the
+ * write is not sizeof(int), the multiplier is not
+ * changed. */
+ if (has_mult) {
+ to_write = sizeof(int);
+ } else {
+ multiplier = 0;
+ /* sth different from sizeof(int) */
+ to_write = 1;
+ }
+ /* try to become root, just in case */
+ ignore_result( setuid(0) );
+ fd = open(defaultpro, O_WRONLY);
+ if (fd < 0)
+ err(EXIT_FAILURE, "%s", defaultpro);
+ if (write(fd, &multiplier, to_write) != to_write)
+ err(EXIT_FAILURE, _("error writing %s"), defaultpro);
+ close(fd);
+ exit(EXIT_SUCCESS);
+ }
+
+ /* Use an fd for the profiling buffer, to skip stdio overhead */
+ if (((proFd = open(proFile, O_RDONLY)) < 0)
+ || ((int)(len = lseek(proFd, 0, SEEK_END)) < 0)
+ || (lseek(proFd, 0, SEEK_SET) < 0))
+ err(EXIT_FAILURE, "%s", proFile);
+ if (!len)
+ errx(EXIT_FAILURE, "%s: %s", proFile, _("input file is empty"));
+
+ buf = xmalloc(len);
+
+ rc = read(proFd, buf, len);
+ if (rc < 0 || (size_t) rc != len)
+ err(EXIT_FAILURE, "%s", proFile);
+ close(proFd);
+
+ if (!optNative) {
+ int entries = len / sizeof(*buf);
+ int big = 0, small = 0;
+ unsigned *p;
+ size_t i;
+
+ for (p = buf + 1; p < buf + entries; p++) {
+ if (*p & ~0U << ((unsigned) sizeof(*buf) * 4U))
+ big++;
+ if (*p & ((1U << ((unsigned) sizeof(*buf) * 4U)) - 1U))
+ small++;
+ }
+ if (big > small) {
+ warnx(_("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: %u\n"), step);
+ exit(EXIT_SUCCESS);
+ }
+
+ total = 0;
+
+ map = myopen(mapFile, "r", &popenMap);
+ if (map == NULL && mapFile == defaultmap) {
+ mapFile = boot_uname_r_str();
+ map = myopen(mapFile, "r", &popenMap);
+ }
+ if (map == NULL)
+ err(EXIT_FAILURE, "%s", mapFile);
+
+ while (fgets(mapline, S_LEN, map)) {
+ if (sscanf(mapline, "%llx %7[^\n ] %127[^\n ]", &fn_add, mode, fn_name) != 3)
+ errx(EXIT_FAILURE, _("%s(%i): wrong map line"), mapFile,
+ maplineno);
+ /* only elf works like this */
+ if (!strcmp(fn_name, "_stext") || !strcmp(fn_name, "__stext")) {
+ add0 = fn_add;
+ break;
+ }
+ maplineno++;
+ }
+
+ if (!add0)
+ errx(EXIT_FAILURE, _("can't find \"_stext\" in %s"), mapFile);
+
+ /*
+ * Main loop.
+ */
+ while (fgets(mapline, S_LEN, map)) {
+ unsigned int this = 0;
+ int done = 0;
+
+ if (sscanf(mapline, "%llx %7[^\n ] %127[^\n ]", &next_add, mode, next_name) != 3)
+ errx(EXIT_FAILURE, _("%s(%i): wrong map line"), mapFile,
+ maplineno);
+ header_printed = 0;
+
+ /* the kernel only profiles up to _etext */
+ if (!strcmp(next_name, "_etext") ||
+ !strcmp(next_name, "__etext"))
+ done = 1;
+ else {
+ /* ignore any LEADING (before a '[tT]' symbol
+ * is found) Absolute symbols and __init_end
+ * because some architectures place it before
+ * .text section */
+ if ((*mode == 'A' || *mode == '?')
+ && (total == 0 || !strcmp(next_name, "__init_end")))
+ continue;
+ if (*mode != 'T' && *mode != 't' &&
+ *mode != 'W' && *mode != 'w')
+ break; /* only text is profiled */
+ }
+
+ if (indx >= len / sizeof(*buf))
+ errx(EXIT_FAILURE,
+ _("profile address out of range. Wrong map file?"));
+
+ while (step > 0 && 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 %6u %8.4f\n", fn_add,
+ fn_name, this, this / (double)fn_len);
+ else
+ printf("%6u %-40s %8.4f\n",
+ this, fn_name, this / (double)fn_len);
+ if (optSub && step > 0) {
+ 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++;
+ if (done)
+ break;
+ }
+
+ /* clock ticks, out of kernel text - probably modules */
+ printf("%6u %s\n", buf[len / sizeof(*buf) - 1], "*unknown*");
+
+ if (fn_add > add0)
+ rep = total / (double)(fn_add - add0);
+
+ /* trailer */
+ if (optVerbose)
+ printf("%016x %-40s %6u %8.4f\n",
+ 0, "total", total, rep);
+ else
+ printf("%6u %-40s %8.4f\n",
+ total, _("total"), rep);
+
+ popenMap ? pclose(map) : fclose(map);
+ exit(EXIT_SUCCESS);
+}
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