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d614a753 | 1 | /* Copyright (C) 1991-2020 Free Software Foundation, Inc. |
ebbad4cc | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
ebbad4cc | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 8 | |
ebbad4cc UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
28f540f4 | 17 | |
28f540f4 | 18 | #include <stddef.h> |
28f540f4 | 19 | #include <sys/resource.h> |
ab5ee31e AZ |
20 | #include <shlib-compat.h> |
21 | ||
22 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_33) | |
23 | ||
24 | /* Granularity of the `vm_utime' and `vm_stime' fields of a `struct vtimes'. | |
25 | (This is the frequency of the machine's power supply, in Hz.) */ | |
26 | # define VTIMES_UNITS_PER_SECOND 60 | |
27 | ||
28 | struct vtimes | |
29 | { | |
30 | /* User time used in units of 1/VTIMES_UNITS_PER_SECOND seconds. */ | |
31 | int vm_utime; | |
32 | /* System time used in units of 1/VTIMES_UNITS_PER_SECOND seconds. */ | |
33 | int vm_stime; | |
34 | ||
35 | /* Amount of data and stack memory used (kilobyte-seconds). */ | |
36 | unsigned int vm_idsrss; | |
37 | /* Amount of text memory used (kilobyte-seconds). */ | |
38 | unsigned int vm_ixrss; | |
39 | /* Maximum resident set size (text, data, and stack) (kilobytes). */ | |
40 | int vm_maxrss; | |
41 | ||
42 | /* Number of hard page faults (i.e. those that required I/O). */ | |
43 | int vm_majflt; | |
44 | /* Number of soft page faults (i.e. those serviced by reclaiming | |
45 | a page from the list of pages awaiting reallocation. */ | |
46 | int vm_minflt; | |
47 | ||
48 | /* Number of times a process was swapped out of physical memory. */ | |
49 | int vm_nswap; | |
50 | ||
51 | /* Number of input operations via the file system. Note: This | |
52 | and `ru_oublock' do not include operations with the cache. */ | |
53 | int vm_inblk; | |
54 | /* Number of output operations via the file system. */ | |
55 | int vm_oublk; | |
56 | }; | |
28f540f4 RM |
57 | |
58 | /* Return the number of 1/VTIMES_UNITS_PER_SECOND-second | |
59 | units in the `struct timeval' TV. */ | |
ab5ee31e | 60 | # define TIMEVAL_TO_VTIMES(tv) \ |
34a5a146 JM |
61 | ((tv.tv_sec * VTIMES_UNITS_PER_SECOND) \ |
62 | + (tv.tv_usec * VTIMES_UNITS_PER_SECOND / 1000000)) | |
28f540f4 RM |
63 | |
64 | /* If VT is not NULL, write statistics for WHO into *VT. | |
65 | Return 0 for success, -1 for failure. */ | |
66 | static int | |
76b87c03 | 67 | vtimes_one (struct vtimes *vt, enum __rusage_who who) |
28f540f4 RM |
68 | { |
69 | if (vt != NULL) | |
70 | { | |
71 | struct rusage usage; | |
72 | ||
50304ef0 | 73 | if (__getrusage (who, &usage) < 0) |
28f540f4 RM |
74 | return -1; |
75 | ||
8f2ece69 UD |
76 | vt->vm_utime = TIMEVAL_TO_VTIMES (usage.ru_utime); |
77 | vt->vm_stime = TIMEVAL_TO_VTIMES (usage.ru_stime); | |
28f540f4 RM |
78 | vt->vm_idsrss = usage.ru_idrss + usage.ru_isrss; |
79 | vt->vm_majflt = usage.ru_majflt; | |
80 | vt->vm_minflt = usage.ru_minflt; | |
81 | vt->vm_nswap = usage.ru_nswap; | |
82 | vt->vm_inblk = usage.ru_inblock; | |
83 | vt->vm_oublk = usage.ru_oublock; | |
84 | } | |
85 | return 0; | |
86 | } | |
87 | ||
88 | /* If CURRENT is not NULL, write statistics for the current process into | |
89 | *CURRENT. If CHILD is not NULL, write statistics for all terminated child | |
90 | processes into *CHILD. Returns 0 for success, -1 for failure. */ | |
91 | int | |
ab5ee31e | 92 | __vtimes (struct vtimes *current, struct vtimes *child) |
28f540f4 | 93 | { |
8f2ece69 UD |
94 | if (vtimes_one (current, RUSAGE_SELF) < 0 |
95 | || vtimes_one (child, RUSAGE_CHILDREN) < 0) | |
28f540f4 RM |
96 | return -1; |
97 | return 0; | |
98 | } | |
ab5ee31e AZ |
99 | compat_symbol (libc, __vtimes, vtimes, GLIBC_2_0); |
100 | ||
101 | #endif /* SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_33) */ |