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Commit | Line | Data |
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76a50749 | 1 | /* Get thread information. |
dff8da6b | 2 | Copyright (C) 1999-2024 Free Software Foundation, Inc. |
76a50749 | 3 | This file is part of the GNU C Library. |
76a50749 UD |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
76a50749 UD |
18 | |
19 | #include <stddef.h> | |
20 | #include <string.h> | |
e054f494 | 21 | #include <stdint.h> |
76a50749 UD |
22 | #include "thread_dbP.h" |
23 | ||
24 | ||
25 | td_err_e | |
26 | td_thr_get_info (const td_thrhandle_t *th, td_thrinfo_t *infop) | |
27 | { | |
7f08f55a RM |
28 | td_err_e err; |
29 | void *copy; | |
30 | psaddr_t tls, schedpolicy, schedprio, cancelhandling, tid, report_events; | |
31 | ||
76a50749 UD |
32 | LOG ("td_thr_get_info"); |
33 | ||
7d9d8bd1 RM |
34 | if (th->th_unique == 0) |
35 | { | |
36 | /* Special case for the main thread before initialization. */ | |
37 | copy = NULL; | |
38 | tls = 0; | |
39 | cancelhandling = 0; | |
2191e7ff | 40 | schedpolicy = SCHED_OTHER; |
7d9d8bd1 RM |
41 | schedprio = 0; |
42 | tid = 0; | |
a78e5979 FW |
43 | |
44 | /* Ignore errors to obtain the __nptl_initial_report_events | |
45 | value because GDB no longer uses the events interface, and | |
46 | other libthread_db consumers hopefully can handle different | |
47 | libpthread/lds.o load orders. */ | |
48 | report_events = 0; | |
49 | (void) DB_GET_VALUE (report_events, th->th_ta_p, | |
50 | __nptl_initial_report_events, 0); | |
51 | err = TD_OK; | |
7d9d8bd1 RM |
52 | } |
53 | else | |
54 | { | |
55 | /* Copy the whole descriptor in once so we can access the several | |
56 | fields locally. Excess copying in one go is much better than | |
57 | multiple ps_pdread calls. */ | |
58 | err = DB_GET_STRUCT (copy, th->th_ta_p, th->th_unique, pthread); | |
59 | if (err != TD_OK) | |
60 | return err; | |
61 | ||
62 | err = DB_GET_FIELD_ADDRESS (tls, th->th_ta_p, th->th_unique, | |
63 | pthread, specific, 0); | |
64 | if (err != TD_OK) | |
65 | return err; | |
66 | ||
67 | err = DB_GET_FIELD_LOCAL (schedpolicy, th->th_ta_p, copy, pthread, | |
68 | schedpolicy, 0); | |
69 | if (err != TD_OK) | |
70 | return err; | |
71 | err = DB_GET_FIELD_LOCAL (schedprio, th->th_ta_p, copy, pthread, | |
72 | schedparam_sched_priority, 0); | |
73 | if (err != TD_OK) | |
74 | return err; | |
75 | err = DB_GET_FIELD_LOCAL (tid, th->th_ta_p, copy, pthread, tid, 0); | |
76 | if (err != TD_OK) | |
77 | return err; | |
78 | err = DB_GET_FIELD_LOCAL (cancelhandling, th->th_ta_p, copy, pthread, | |
79 | cancelhandling, 0); | |
80 | if (err != TD_OK) | |
81 | return err; | |
82 | err = DB_GET_FIELD_LOCAL (report_events, th->th_ta_p, copy, pthread, | |
83 | report_events, 0); | |
84 | } | |
7f08f55a RM |
85 | if (err != TD_OK) |
86 | return err; | |
76a50749 | 87 | |
7f0d9e61 | 88 | /* Fill in information. Clear first to provide reproducible |
76a50749 UD |
89 | results for the fields we do not fill in. */ |
90 | memset (infop, '\0', sizeof (td_thrinfo_t)); | |
91 | ||
7f08f55a RM |
92 | infop->ti_tid = (thread_t) th->th_unique; |
93 | infop->ti_tls = (char *) tls; | |
94 | infop->ti_pri = ((uintptr_t) schedpolicy == SCHED_OTHER | |
95 | ? 0 : (uintptr_t) schedprio); | |
76a50749 UD |
96 | infop->ti_type = TD_THR_USER; |
97 | ||
7f08f55a | 98 | if ((((int) (uintptr_t) cancelhandling) & EXITING_BITMASK) == 0) |
76a50749 UD |
99 | /* XXX For now there is no way to get more information. */ |
100 | infop->ti_state = TD_THR_ACTIVE; | |
7f08f55a | 101 | else if ((((int) (uintptr_t) cancelhandling) & TERMINATED_BITMASK) == 0) |
76a50749 UD |
102 | infop->ti_state = TD_THR_ZOMBIE; |
103 | else | |
104 | infop->ti_state = TD_THR_UNKNOWN; | |
105 | ||
106 | /* Initialization which are the same in both cases. */ | |
76a50749 | 107 | infop->ti_ta_p = th->th_ta_p; |
7f08f55a RM |
108 | infop->ti_lid = tid == 0 ? ps_getpid (th->th_ta_p->ph) : (uintptr_t) tid; |
109 | infop->ti_traceme = report_events != 0; | |
110 | ||
7d9d8bd1 RM |
111 | if (copy != NULL) |
112 | err = DB_GET_FIELD_LOCAL (infop->ti_startfunc, th->th_ta_p, copy, pthread, | |
113 | start_routine, 0); | |
114 | if (copy != NULL && err == TD_OK) | |
7f08f55a RM |
115 | { |
116 | uint32_t idx; | |
117 | for (idx = 0; idx < TD_EVENTSIZE; ++idx) | |
118 | { | |
119 | psaddr_t word; | |
120 | err = DB_GET_FIELD_LOCAL (word, th->th_ta_p, copy, pthread, | |
121 | eventbuf_eventmask_event_bits, idx); | |
122 | if (err != TD_OK) | |
123 | break; | |
124 | infop->ti_events.event_bits[idx] = (uintptr_t) word; | |
125 | } | |
126 | if (err == TD_NOAPLIC) | |
127 | memset (&infop->ti_events.event_bits[idx], 0, | |
128 | (TD_EVENTSIZE - idx) * sizeof infop->ti_events.event_bits[0]); | |
129 | } | |
76a50749 | 130 | |
7f08f55a | 131 | return err; |
76a50749 | 132 | } |