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authorDenis Vlasenko2007-09-08 16:51:19 +0000
committerDenis Vlasenko2007-09-08 16:51:19 +0000
commitff6e8e2974433aeabaaefaf9d8b6a35e9641b9ac (patch)
tree83de779a734d2a1e6d877718841188e630629265 /libbb/procps.c
parent9382b3809b3f6bea8dec6483ff66d7c2b21abd94 (diff)
downloadbusybox-ff6e8e2974433aeabaaefaf9d8b6a35e9641b9ac.zip
busybox-ff6e8e2974433aeabaaefaf9d8b6a35e9641b9ac.tar.gz
top: TOPMEM feature - 's(how sizes)' command. +2.5k when enabled,
+80 bytes when disabled (mainly because of text wrapping fixes in display_process_list).
Diffstat (limited to 'libbb/procps.c')
-rw-r--r--libbb/procps.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/libbb/procps.c b/libbb/procps.c
index 8d3aea3..3a31eef 100644
--- a/libbb/procps.c
+++ b/libbb/procps.c
@@ -115,6 +115,28 @@ void free_procps_scan(procps_status_t* sp)
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)
@@ -278,6 +300,57 @@ procps_status_t *procps_scan(procps_status_t* sp, int flags)
}
+#if ENABLE_FEATURE_TOPMEM
+ if (flags & (PSSCAN_SMAPS)) {
+ FILE *file;
+
+ strcpy(filename_tail, "/smaps");
+ file = fopen(filename, "r");
+ 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) {