/* vi: set sw=4 ts=4: */
/*
- * readprofile.c - used to read /proc/profile
+ * readprofile.c - used to read /proc/profile
*
- * Copyright (C) 1994,1996 Alessandro Rubini (rubini@ipvvis.unipv.it)
+ * Copyright (C) 1994,1996 Alessandro Rubini (rubini@ipvvis.unipv.it)
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
* Taken from util-linux and adapted for busybox by
* Paul Mundt <lethal@linux-sh.org>.
*/
+//config:config READPROFILE
+//config: bool "readprofile (7.1 kb)"
+//config: default y
+//config: #select PLATFORM_LINUX
+//config: help
+//config: This allows you to parse /proc/profile for basic profiling.
+
+//applet:IF_READPROFILE(APPLET(readprofile, BB_DIR_USR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_READPROFILE) += readprofile.o
//usage:#define readprofile_trivial_usage
//usage: "[OPTIONS]"
#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;
+ unsigned long indx;
size_t len;
- uint64_t add0 = 0;
+ uint64_t add0;
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;
+ int maplineno;
+ int multiplier;
unsigned opt;
enum {
OPT_M = (1 << 0),
#define next (current^1)
- proFile = defaultpro;
- mapFile = defaultmap;
+ proFile = "/proc/profile";
+ mapFile = "/boot/System.map";
+ multiplier = 0;
- opt_complementary = "M+"; /* -M N */
- opt = getopt32(argv, "M:m:p:nabsirv", &multiplier, &mapFile, &proFile);
+ 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;
if (!optMult)
to_write = 1; /* sth different from sizeof(int) */
- fd = xopen(defaultpro, O_WRONLY);
+ fd = xopen("/proc/profile", O_WRONLY);
xwrite(fd, &multiplier, to_write);
close(fd);
return EXIT_SUCCESS;
*/
len = MAXINT(ssize_t);
buf = xmalloc_xopen_read_close(proFile, &len);
+ len /= sizeof(*buf);
+
if (!optNative) {
- int entries = len / sizeof(*buf);
- int big = 0, small = 0, i;
+ int big = 0, small = 0;
unsigned *p;
- for (p = buf+1; p < buf+entries; p++) {
+ for (p = buf+1; p < buf+len; 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, "
+ bb_simple_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;
- }
+ BUILD_BUG_ON(sizeof(*p) > 8);
+ for (p = buf; p < buf+len; p++) {
+ if (sizeof(*p) == 2)
+ *p = bswap_16(*p);
+ if (sizeof(*p) == 4)
+ *p = bswap_32(*p);
+ if (sizeof(*p) == 8)
+ *p = bb_bswap_64(*p);
+ }
}
}
step = buf[0];
if (optInfo) {
- printf("Sampling_step: %i\n", step);
+ printf("Sampling_step: %u\n", step);
return EXIT_SUCCESS;
}
- total = 0;
-
map = xfopen_for_read(mapFile);
-
+ add0 = 0;
+ maplineno = 1;
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 */ {
+ if (strcmp(fn_name, "_stext") == 0) /* only elf works like this */ {
add0 = fn_add;
break;
}
/*
* Main loop.
*/
+ total = 0;
+ indx = 1;
while (fgets(mapline, S_LEN, map)) {
- unsigned int this = 0;
+ bool header_printed;
+ unsigned int this;
if (sscanf(mapline, "%llx %s %s", &next_add, mode, next_name) != 3)
bb_error_msg_and_die("%s(%i): wrong map line",
/* 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'
- ) {
+ if ((mode[0] == 'A' || mode[0] == '?') && total == 0)
+ continue;
+ if ((mode[0]|0x20) != 't' && (mode[0]|0x20) != 'w') {
break; /* only text is profiled */
}
- if (indx >= len / sizeof(*buf))
- bb_error_msg_and_die("profile address out of range. "
+ if (indx >= len)
+ bb_simple_error_msg_and_die("profile address out of range. "
"Wrong map file?");
+ this = 0;
while (indx < (next_add-add0)/step) {
if (optBins && (buf[indx] || optAll)) {
if (!header_printed) {
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
+ } else
+ if ((this || optAll)
+ && (fn_len = next_add-fn_add) != 0
) {
if (optVerbose)
- printf("%016llx %-40s %6i %8.4f\n", fn_add,
+ printf("%016llx %-40s %6u %8.4f\n", fn_add,
fn_name, this, this/(double)fn_len);
else
- printf("%6i %-40s %8.4f\n",
+ printf("%6u %-40s %8.4f\n",
this, fn_name, this/(double)fn_len);
if (optSub) {
unsigned long long scan;
}
/* clock ticks, out of kernel text - probably modules */
- printf("%6i %s\n", buf[len/sizeof(*buf)-1], "*unknown*");
+ printf("%6u *unknown*\n", buf[len-1]);
/* trailer */
if (optVerbose)
- printf("%016x %-40s %6i %8.4f\n",
+ printf("%016x %-40s %6u %8.4f\n",
0, "total", total, total/(double)(fn_add-add0));
else
- printf("%6i %-40s %8.4f\n",
+ printf("%6u %-40s %8.4f\n",
total, "total", total/(double)(fn_add-add0));
- fclose(map);
- free(buf);
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ fclose(map);
+ free(buf);
+ }
return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff