* Copyright 1998 by Albert Cahalan; all rights reserved.
* Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
* SELinux support: (c) 2007 by Yuichi Nakamura <ynakam@hitachisoft.jp>
- *
+ *
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
cp->cache = NULL;
cp->size = 0;
}
-void clear_username_cache(void)
+void FAST_FUNC clear_username_cache(void)
{
clear_cache(&username);
clear_cache(&groupname);
if (cp->cache[i].id == id)
return i;
i = cp->size++;
- cp->cache = xrealloc(cp->cache, cp->size * sizeof(*cp->cache));
+ cp->cache = xrealloc_vector(cp->cache, 2, i);
cp->cache[i++].id = id;
return -i;
}
#endif
-typedef char* ug_func(char *name, long uid, int bufsize);
+typedef char* FAST_FUNC ug_func(char *name, int bufsize, long uid);
static char* get_cached(cache_t *cp, unsigned id, ug_func* fp)
{
int i;
if (cp->cache[i].id == id)
return cp->cache[i].name;
i = cp->size++;
- cp->cache = xrealloc(cp->cache, cp->size * sizeof(*cp->cache));
+ cp->cache = xrealloc_vector(cp->cache, 2, i);
cp->cache[i].id = id;
- fp(cp->cache[i].name, id, sizeof(cp->cache[i].name));
+ /* Never fails. Generates numeric string if name isn't found */
+ fp(cp->cache[i].name, sizeof(cp->cache[i].name), id);
return cp->cache[i].name;
}
-const char* get_cached_username(uid_t uid)
+const char* FAST_FUNC get_cached_username(uid_t uid)
{
return get_cached(&username, uid, bb_getpwuid);
}
-const char* get_cached_groupname(gid_t gid)
+const char* FAST_FUNC get_cached_groupname(gid_t gid)
{
return get_cached(&groupname, gid, bb_getgrgid);
}
return ret;
}
-procps_status_t *alloc_procps_scan(int flags)
+static procps_status_t* FAST_FUNC alloc_procps_scan(void)
{
+ unsigned n = getpagesize();
procps_status_t* sp = xzalloc(sizeof(procps_status_t));
sp->dir = xopendir("/proc");
+ while (1) {
+ n >>= 1;
+ if (!n) break;
+ sp->shift_pages_to_bytes++;
+ }
+ sp->shift_pages_to_kb = sp->shift_pages_to_bytes - 10;
return sp;
}
-void free_procps_scan(procps_status_t* sp)
+void FAST_FUNC free_procps_scan(procps_status_t* sp)
{
closedir(sp->dir);
free(sp->argv0);
free(sp);
}
+#if ENABLE_FEATURE_TOPMEM
+static unsigned long fast_strtoul_16(char **endptr)
+{
+ unsigned char c;
+ char *str = *endptr;
+ unsigned long n = 0;
+
+ while ((c = *str++) != ' ') {
+ c = ((c|0x20) - '0');
+ if (c > 9)
+ // c = c + '0' - 'a' + 10:
+ c = c - ('a' - '0' - 10);
+ n = n*16 + c;
+ }
+ *endptr = str; /* We skip trailing space! */
+ return n;
+}
+/* TOPMEM uses fast_strtoul_10, so... */
+#undef ENABLE_FEATURE_FAST_TOP
+#define ENABLE_FEATURE_FAST_TOP 1
+#endif
+
#if ENABLE_FEATURE_FAST_TOP
/* We cut a lot of corners here for speed */
static unsigned long fast_strtoul_10(char **endptr)
#endif
void BUG_comm_size(void);
-procps_status_t *procps_scan(procps_status_t* sp, int flags)
+procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
{
struct dirent *entry;
char buf[PROCPS_BUFSIZE];
struct stat sb;
if (!sp)
- sp = alloc_procps_scan(flags);
+ sp = alloc_procps_scan();
for (;;) {
entry = readdir(sp->dir);
if (flags & PSSCAN_CONTEXT) {
if (getpidcon(sp->pid, &sp->context) < 0)
sp->context = NULL;
- }
-#endif
+ }
+#endif
filename_tail = filename + sprintf(filename, "/proc/%d", pid);
"%lu %lu " /* utime, stime */
"%*s %*s %*s " /* cutime, cstime, priority */
"%ld " /* nice */
- "%*s %*s %*s " /* timeout, it_real_value, start_time */
+ "%*s %*s " /* timeout, it_real_value */
+ "%lu " /* start_time */
"%lu " /* vsize */
"%lu " /* rss */
/* "%lu %lu %lu %lu %lu %lu " rss_rlim, start_code, end_code, start_stack, kstk_esp, kstk_eip */
&sp->pgid, &sp->sid, &tty,
&sp->utime, &sp->stime,
&tasknice,
+ &sp->start_time,
&vsz,
&rss);
- if (n != 10)
+ if (n != 11)
break;
- sp->vsz = vsz >> 10; /* vsize is in bytes and we want kb */
- sp->rss = rss >> 10;
+ /* vsz is in bytes and we want kb */
+ sp->vsz = vsz >> 10;
+ /* vsz is in bytes but rss is in *PAGES*! Can you believe that? */
+ sp->rss = rss << sp->shift_pages_to_kb;
sp->tty_major = (tty >> 8) & 0xfff;
sp->tty_minor = (tty & 0xff) | ((tty >> 12) & 0xfff00);
#else
sp->stime = fast_strtoul_10(&cp);
cp = skip_fields(cp, 3); /* cutime, cstime, priority */
tasknice = fast_strtoul_10(&cp);
- cp = skip_fields(cp, 3); /* timeout, it_real_value, start_time */
- sp->vsz = fast_strtoul_10(&cp) >> 10; /* vsize is in bytes and we want kb */
- sp->rss = fast_strtoul_10(&cp) >> 10;
+ cp = skip_fields(cp, 2); /* timeout, it_real_value */
+ sp->start_time = fast_strtoul_10(&cp);
+ /* vsz is in bytes and we want kb */
+ sp->vsz = fast_strtoul_10(&cp) >> 10;
+ /* vsz is in bytes but rss is in *PAGES*! Can you believe that? */
+ sp->rss = fast_strtoul_10(&cp) << sp->shift_pages_to_kb;
#endif
if (sp->vsz == 0 && sp->state[0] != 'Z')
}
+#if ENABLE_FEATURE_TOPMEM
+ if (flags & (PSSCAN_SMAPS)) {
+ FILE *file;
+
+ strcpy(filename_tail, "/smaps");
+ file = fopen_for_read(filename);
+ if (!file)
+ break;
+ while (fgets(buf, sizeof(buf), file)) {
+ unsigned long sz;
+ char *tp;
+ char w;
+#define SCAN(str, name) \
+ if (strncmp(buf, str, sizeof(str)-1) == 0) { \
+ tp = skip_whitespace(buf + sizeof(str)-1); \
+ sp->name += fast_strtoul_10(&tp); \
+ continue; \
+ }
+ SCAN("Shared_Clean:" , shared_clean );
+ SCAN("Shared_Dirty:" , shared_dirty );
+ SCAN("Private_Clean:", private_clean);
+ SCAN("Private_Dirty:", private_dirty);
+#undef SCAN
+ // f7d29000-f7d39000 rw-s ADR M:m OFS FILE
+ tp = strchr(buf, '-');
+ if (tp) {
+ *tp = ' ';
+ tp = buf;
+ sz = fast_strtoul_16(&tp); /* start */
+ sz = (fast_strtoul_16(&tp) - sz) >> 10; /* end - start */
+ // tp -> "rw-s" string
+ w = tp[1];
+ // skipping "rw-s ADR M:m OFS "
+ tp = skip_whitespace(skip_fields(tp, 4));
+ // filter out /dev/something (something != zero)
+ if (strncmp(tp, "/dev/", 5) != 0 || strcmp(tp, "/dev/zero\n") == 0) {
+ if (w == 'w') {
+ sp->mapped_rw += sz;
+ } else if (w == '-') {
+ sp->mapped_ro += sz;
+ }
+ }
+//else printf("DROPPING %s (%s)\n", buf, tp);
+ if (strcmp(tp, "[stack]\n") == 0)
+ sp->stack += sz;
+ }
+ }
+ fclose(file);
+ }
+#endif /* TOPMEM */
+
#if 0 /* PSSCAN_CMD is not used */
if (flags & (PSSCAN_CMD|PSSCAN_ARGV0)) {
- if (sp->argv0) {
- free(sp->argv0);
- sp->argv0 = NULL;
- }
- if (sp->cmd) {
- free(sp->cmd);
- sp->cmd = NULL;
- }
+ free(sp->argv0);
+ sp->argv0 = NULL;
+ free(sp->cmd);
+ sp->cmd = NULL;
strcpy(filename_tail, "/cmdline");
/* TODO: to get rid of size limits, read into malloc buf,
* then realloc it down to real size. */
}
}
#else
- if (flags & PSSCAN_ARGV0) {
- if (sp->argv0) {
- free(sp->argv0);
- sp->argv0 = NULL;
- }
+ if (flags & (PSSCAN_ARGV0|PSSCAN_ARGVN)) {
+ free(sp->argv0);
+ sp->argv0 = NULL;
strcpy(filename_tail, "/cmdline");
n = read_to_buf(filename, buf);
if (n <= 0)
break;
- if (flags & PSSCAN_ARGV0)
+ if (flags & PSSCAN_ARGVN) {
+ sp->argv_len = n;
+ sp->argv0 = xmalloc(n + 1);
+ memcpy(sp->argv0, buf, n + 1);
+ /* sp->argv0[n] = '\0'; - buf has it */
+ } else {
+ sp->argv_len = 0;
sp->argv0 = xstrdup(buf);
+ }
}
#endif
break;
return sp;
}
-void read_cmdline(char *buf, int col, unsigned pid, const char *comm)
+void FAST_FUNC read_cmdline(char *buf, int col, unsigned pid, const char *comm)
{
ssize_t sz;
char filename[sizeof("/proc//cmdline") + sizeof(int)*3];
projects / oweals / busybox.git / blobdiff