1 | /* Copyright (C) 1991-2024 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
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. |
8 | |
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 |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <stddef.h> |
19 | #include <sys/resource.h> |
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 | }; |
57 | |
58 | /* Return the number of 1/VTIMES_UNITS_PER_SECOND-second |
59 | units in the `struct timeval' TV. */ |
60 | # define TIMEVAL_TO_VTIMES(tv) \ |
61 | ((tv.tv_sec * VTIMES_UNITS_PER_SECOND) \ |
62 | + (tv.tv_usec * VTIMES_UNITS_PER_SECOND / 1000000)) |
63 | |
64 | /* If VT is not NULL, write statistics for WHO into *VT. |
65 | Return 0 for success, -1 for failure. */ |
66 | static int |
67 | vtimes_one (struct vtimes *vt, enum __rusage_who who) |
68 | { |
69 | if (vt != NULL) |
70 | { |
71 | struct rusage usage; |
72 | |
73 | if (__getrusage (who, &usage) < 0) |
74 | return -1; |
75 | |
76 | vt->vm_utime = TIMEVAL_TO_VTIMES (usage.ru_utime); |
77 | vt->vm_stime = TIMEVAL_TO_VTIMES (usage.ru_stime); |
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 |
92 | __vtimes (struct vtimes *current, struct vtimes *child) |
93 | { |
94 | if (vtimes_one (current, RUSAGE_SELF) < 0 |
95 | || vtimes_one (child, RUSAGE_CHILDREN) < 0) |
96 | return -1; |
97 | return 0; |
98 | } |
99 | compat_symbol (libc, __vtimes, vtimes, GLIBC_2_0); |
100 | |
101 | #endif /* SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_33) */ |
102 | |