1/*
2 * Copyright (c) 2004 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *

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20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/gnu/usr.bin/gdb/kgdb/kthr.c 210852 2010-08-04 21:02:04Z jhb $");
29
30#include <sys/param.h>
31#include <sys/proc.h>
32#include <sys/types.h>
33#include <sys/signal.h>
34#include <err.h>
35#include <inttypes.h>
36#include <kvm.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <string.h>
40
41#include <defs.h>
42#include <frame-unwind.h>
43
44#include "kgdb.h"
45#include <machine/pcb.h>
46
47static CORE_ADDR dumppcb;
48static int dumptid;
49
50static CORE_ADDR stoppcbs;
51static __cpumask_t stopped_cpus;
52
53static struct kthr *first;
54struct kthr *curkthr;
55
56CORE_ADDR
57kgdb_lookup(const char *sym)
58{
59 CORE_ADDR addr;
60 char *name;
61
62 asprintf(&name, "&%s", sym);
63 addr = kgdb_parse(name);
64 free(name);
65 return (addr);
66}
67
68struct kthr *
69kgdb_thr_first(void)
70{
71 return (first);
72}
73
74struct kthr *
75kgdb_thr_init(void)
76{
77 struct proc p;
78 struct thread td;
79 struct kthr *kt;
80 CORE_ADDR addr;
81 uintptr_t paddr;
82
83 while (first != NULL) {
84 kt = first;
85 first = kt->next;
86 free(kt);
87 }
88
89 addr = kgdb_lookup("allproc");
90 if (addr == 0)
91 return (NULL);
92 kvm_read(kvm, addr, &paddr, sizeof(paddr));
93
94 dumppcb = kgdb_lookup("dumppcb");
95 if (dumppcb == 0)
96 return (NULL);
97
98 addr = kgdb_lookup("dumptid");
99 if (addr != 0)
100 kvm_read(kvm, addr, &dumptid, sizeof(dumptid));
101 else
102 dumptid = -1;
103
104 addr = kgdb_lookup("stopped_cpus");
105 if (addr != 0)
106 kvm_read(kvm, addr, &stopped_cpus, sizeof(stopped_cpus));
107 else
108 stopped_cpus = 0;
109
110 stoppcbs = kgdb_lookup("stoppcbs");
111
112 while (paddr != 0) {
113 if (kvm_read(kvm, paddr, &p, sizeof(p)) != sizeof(p)) {
114 warnx("kvm_read: %s", kvm_geterr(kvm));
115 break;
116 }
117 addr = (uintptr_t)TAILQ_FIRST(&p.p_threads);
118 while (addr != 0) {

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