From 378c18e5f024ac5a8aef4cb40d7c9aa9633d144c Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 16:30:35 +0200 Subject: Adding upstream version 2.38.1. Signed-off-by: Daniel Baumann --- sys-utils/readprofile.c | 415 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 415 insertions(+) create mode 100644 sys-utils/readprofile.c (limited to 'sys-utils/readprofile.c') diff --git a/sys-utils/readprofile.c b/sys-utils/readprofile.c new file mode 100644 index 0000000..579902d --- /dev/null +++ b/sys-utils/readprofile.c @@ -0,0 +1,415 @@ +/* + * 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 + * - added Native Language Support + * 1999-09-01 Stephane Eranian + * - 64bit clean patch + * 3Feb2001 Andrew Morton + * - -M option to write profile multiplier. + * 2001-11-07 Werner Almesberger + * - byte order auto-detection and -n option + * 2001-11-09 Werner Almesberger + * - skip step size (index 0) + * 2002-03-09 John Levon + * - make maplineno do something + * 2002-11-28 Mads Martin Joergensen + + * - also try /boot/System.map-`uname -r` + * 2003-04-09 Werner Almesberger + * - fixed off-by eight error and improved heuristics in byte order detection + * 2003-08-12 Nikita Danilov + * - added -s option; example of use: + * "readprofile -s -m /boot/System.map-test | grep __d_lookup | sort -n -k3" + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 (defaults: \"%s\" and\n"), defaultmap); + fprintf(out, + _(" \"%s\")\n"), boot_uname_r_str()); + fprintf(out, + _(" -p, --profile (default: \"%s\")\n"), defaultpro); + fputs(_(" -M, --multiplier set the profiling multiplier to \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); +} -- cgit v1.2.3