diff options
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/procps.c | 73 |
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) { |