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Walk the zombproc list as well as the allproc list when enumerating threads

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and processes in a kernel image.  This allows examination of threads that
have exited or are in the late stages of exiting.

Tested by:	avg
Approved by:	re (kib)
MFC after:	1 week
This commit is contained in:
John Baldwin 2011-08-19 21:28:40 +00:00
parent 5ca7dfffdf
commit 6dfd657c01
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=225017
1 changed files with 48 additions and 33 deletions
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81
gnu/usr.bin/gdb/kgdb/kthr.c
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@ -73,11 +73,52 @@ kgdb_thr_first(void)
return (first);
}
struct kthr *
kgdb_thr_init(void)
static void
kgdb_thr_add_procs(uintptr_t paddr)
{
struct proc p;
struct thread td;
struct kthr *kt;
CORE_ADDR addr;
while (paddr != 0) {
if (kvm_read(kvm, paddr, &p, sizeof(p)) != sizeof(p)) {
warnx("kvm_read: %s", kvm_geterr(kvm));
break;
}
addr = (uintptr_t)TAILQ_FIRST(&p.p_threads);
while (addr != 0) {
if (kvm_read(kvm, addr, &td, sizeof(td)) !=
sizeof(td)) {
warnx("kvm_read: %s", kvm_geterr(kvm));
break;
}
kt = malloc(sizeof(*kt));
kt->next = first;
kt->kaddr = addr;
if (td.td_tid == dumptid)
kt->pcb = dumppcb;
else if (td.td_state == TDS_RUNNING && stoppcbs != 0 &&
CPU_ISSET(td.td_oncpu, &stopped_cpus))
kt->pcb = (uintptr_t)stoppcbs +
sizeof(struct pcb) * td.td_oncpu;
else
kt->pcb = (uintptr_t)td.td_pcb;
kt->kstack = td.td_kstack;
kt->tid = td.td_tid;
kt->pid = p.p_pid;
kt->paddr = paddr;
kt->cpu = td.td_oncpu;
first = kt;
addr = (uintptr_t)TAILQ_NEXT(&td, td_plist);
}
paddr = (uintptr_t)LIST_NEXT(&p, p_list);
}
}
struct kthr *
kgdb_thr_init(void)
{
long cpusetsize;
struct kthr *kt;
CORE_ADDR addr;
@ -113,37 +154,11 @@ kgdb_thr_init(void)
stoppcbs = kgdb_lookup("stoppcbs");
while (paddr != 0) {
if (kvm_read(kvm, paddr, &p, sizeof(p)) != sizeof(p)) {
warnx("kvm_read: %s", kvm_geterr(kvm));
break;
}
addr = (uintptr_t)TAILQ_FIRST(&p.p_threads);
while (addr != 0) {
if (kvm_read(kvm, addr, &td, sizeof(td)) !=
sizeof(td)) {
warnx("kvm_read: %s", kvm_geterr(kvm));
break;
}
kt = malloc(sizeof(*kt));
kt->next = first;
kt->kaddr = addr;
if (td.td_tid == dumptid)
kt->pcb = dumppcb;
else if (td.td_state == TDS_RUNNING && stoppcbs != 0 &&
CPU_ISSET(td.td_oncpu, &stopped_cpus))
kt->pcb = (uintptr_t) stoppcbs + sizeof(struct pcb) * td.td_oncpu;
else
kt->pcb = (uintptr_t)td.td_pcb;
kt->kstack = td.td_kstack;
kt->tid = td.td_tid;
kt->pid = p.p_pid;
kt->paddr = paddr;
kt->cpu = td.td_oncpu;
first = kt;
addr = (uintptr_t)TAILQ_NEXT(&td, td_plist);
}
paddr = (uintptr_t)LIST_NEXT(&p, p_list);
kgdb_thr_add_procs(paddr);
addr = kgdb_lookup("zombproc");
if (addr != 0) {
kvm_read(kvm, addr, &paddr, sizeof(paddr));
kgdb_thr_add_procs(paddr);
}
curkthr = kgdb_thr_lookup_tid(dumptid);
if (curkthr == NULL)