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76a50749 | 1 | /* Get thread information. |
d614a753 | 2 | Copyright (C) 1999-2020 Free Software Foundation, Inc. |
76a50749 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@redhat.com>, 1999. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 17 | License along with the GNU C Library; if not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
76a50749 UD |
19 | |
20 | #include <stddef.h> | |
21 | #include <string.h> | |
e054f494 | 22 | #include <stdint.h> |
76a50749 UD |
23 | #include "thread_dbP.h" |
24 | ||
25 | ||
26 | td_err_e | |
27 | td_thr_get_info (const td_thrhandle_t *th, td_thrinfo_t *infop) | |
28 | { | |
7f08f55a RM |
29 | td_err_e err; |
30 | void *copy; | |
31 | psaddr_t tls, schedpolicy, schedprio, cancelhandling, tid, report_events; | |
32 | ||
76a50749 UD |
33 | LOG ("td_thr_get_info"); |
34 | ||
7d9d8bd1 RM |
35 | if (th->th_unique == 0) |
36 | { | |
37 | /* Special case for the main thread before initialization. */ | |
38 | copy = NULL; | |
39 | tls = 0; | |
40 | cancelhandling = 0; | |
2191e7ff | 41 | schedpolicy = SCHED_OTHER; |
7d9d8bd1 RM |
42 | schedprio = 0; |
43 | tid = 0; | |
44 | err = DB_GET_VALUE (report_events, th->th_ta_p, | |
45 | __nptl_initial_report_events, 0); | |
46 | } | |
47 | else | |
48 | { | |
49 | /* Copy the whole descriptor in once so we can access the several | |
50 | fields locally. Excess copying in one go is much better than | |
51 | multiple ps_pdread calls. */ | |
52 | err = DB_GET_STRUCT (copy, th->th_ta_p, th->th_unique, pthread); | |
53 | if (err != TD_OK) | |
54 | return err; | |
55 | ||
56 | err = DB_GET_FIELD_ADDRESS (tls, th->th_ta_p, th->th_unique, | |
57 | pthread, specific, 0); | |
58 | if (err != TD_OK) | |
59 | return err; | |
60 | ||
61 | err = DB_GET_FIELD_LOCAL (schedpolicy, th->th_ta_p, copy, pthread, | |
62 | schedpolicy, 0); | |
63 | if (err != TD_OK) | |
64 | return err; | |
65 | err = DB_GET_FIELD_LOCAL (schedprio, th->th_ta_p, copy, pthread, | |
66 | schedparam_sched_priority, 0); | |
67 | if (err != TD_OK) | |
68 | return err; | |
69 | err = DB_GET_FIELD_LOCAL (tid, th->th_ta_p, copy, pthread, tid, 0); | |
70 | if (err != TD_OK) | |
71 | return err; | |
72 | err = DB_GET_FIELD_LOCAL (cancelhandling, th->th_ta_p, copy, pthread, | |
73 | cancelhandling, 0); | |
74 | if (err != TD_OK) | |
75 | return err; | |
76 | err = DB_GET_FIELD_LOCAL (report_events, th->th_ta_p, copy, pthread, | |
77 | report_events, 0); | |
78 | } | |
7f08f55a RM |
79 | if (err != TD_OK) |
80 | return err; | |
76a50749 UD |
81 | |
82 | /* Fill in information. Clear first to provide reproducable | |
83 | results for the fields we do not fill in. */ | |
84 | memset (infop, '\0', sizeof (td_thrinfo_t)); | |
85 | ||
7f08f55a RM |
86 | infop->ti_tid = (thread_t) th->th_unique; |
87 | infop->ti_tls = (char *) tls; | |
88 | infop->ti_pri = ((uintptr_t) schedpolicy == SCHED_OTHER | |
89 | ? 0 : (uintptr_t) schedprio); | |
76a50749 UD |
90 | infop->ti_type = TD_THR_USER; |
91 | ||
7f08f55a | 92 | if ((((int) (uintptr_t) cancelhandling) & EXITING_BITMASK) == 0) |
76a50749 UD |
93 | /* XXX For now there is no way to get more information. */ |
94 | infop->ti_state = TD_THR_ACTIVE; | |
7f08f55a | 95 | else if ((((int) (uintptr_t) cancelhandling) & TERMINATED_BITMASK) == 0) |
76a50749 UD |
96 | infop->ti_state = TD_THR_ZOMBIE; |
97 | else | |
98 | infop->ti_state = TD_THR_UNKNOWN; | |
99 | ||
100 | /* Initialization which are the same in both cases. */ | |
76a50749 | 101 | infop->ti_ta_p = th->th_ta_p; |
7f08f55a RM |
102 | infop->ti_lid = tid == 0 ? ps_getpid (th->th_ta_p->ph) : (uintptr_t) tid; |
103 | infop->ti_traceme = report_events != 0; | |
104 | ||
7d9d8bd1 RM |
105 | if (copy != NULL) |
106 | err = DB_GET_FIELD_LOCAL (infop->ti_startfunc, th->th_ta_p, copy, pthread, | |
107 | start_routine, 0); | |
108 | if (copy != NULL && err == TD_OK) | |
7f08f55a RM |
109 | { |
110 | uint32_t idx; | |
111 | for (idx = 0; idx < TD_EVENTSIZE; ++idx) | |
112 | { | |
113 | psaddr_t word; | |
114 | err = DB_GET_FIELD_LOCAL (word, th->th_ta_p, copy, pthread, | |
115 | eventbuf_eventmask_event_bits, idx); | |
116 | if (err != TD_OK) | |
117 | break; | |
118 | infop->ti_events.event_bits[idx] = (uintptr_t) word; | |
119 | } | |
120 | if (err == TD_NOAPLIC) | |
121 | memset (&infop->ti_events.event_bits[idx], 0, | |
122 | (TD_EVENTSIZE - idx) * sizeof infop->ti_events.event_bits[0]); | |
123 | } | |
76a50749 | 124 | |
7f08f55a | 125 | return err; |
76a50749 | 126 | } |