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pre-emptively fix a KSE/M3 problem.

Browse source 
Make a slight change so that libkvm reaches the main thread via the
linked list, rather than assuming it is in the proc structure. Both
conditions are true in -current but only the first will be true in
the KSE M3 world.
This commit is contained in:
Julian Elischer 2002-02-07 20:28:25 +00:00
parent b5ed0bcd23
commit 3daf63fc50
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=90360
1 changed files with 14 additions and 7 deletions
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21
lib/libkvm/kvm_proc.c
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@ -117,6 +117,7 @@ kvm_proclist(kd, what, arg, p, bp, maxcnt)
struct procsig procsig;
struct pstats pstats;
struct ucred ucred;
struct thread mainthread;
struct proc proc;
struct proc pproc;
@ -128,6 +129,12 @@ kvm_proclist(kd, what, arg, p, bp, maxcnt)
_kvm_err(kd, kd->program, "can't read proc at %x", p);
return (-1);
}
if (KREAD(kd, (u_long)TAILQ_FIRST(&proc.p_threads),
&mainthread)) {
_kvm_err(kd, kd->program, "can't read thread at %x",
TAILQ_FIRST(&proc.p_threads));
return (-1);
}
if (KREAD(kd, (u_long)proc.p_ucred, &ucred) == 0) {
kp->ki_ruid = ucred.cr_ruid;
kp->ki_svuid = ucred.cr_svuid;
@ -260,8 +267,8 @@ kvm_proclist(kd, what, arg, p, bp, maxcnt)
nopgrp:
kp->ki_tdev = NODEV;
}
if (proc.p_thread.td_wmesg) /* XXXKSE */
(void)kvm_read(kd, (u_long)proc.p_thread.td_wmesg,
if (mainthread.td_wmesg) /* XXXKSE */
(void)kvm_read(kd, (u_long)mainthread.td_wmesg,
kp->ki_wmesg, WMESGLEN);
#ifdef sparc
@ -299,10 +306,10 @@ kvm_proclist(kd, what, arg, p, bp, maxcnt)
strncpy(kp->ki_comm, proc.p_comm, MAXCOMLEN);
kp->ki_comm[MAXCOMLEN] = 0;
}
if (proc.p_thread.td_blocked != 0) { /* XXXKSE */
if (mainthread.td_blocked != 0) { /* XXXKSE */
kp->ki_kiflag |= KI_MTXBLOCK;
if (proc.p_thread.td_mtxname) /* XXXKSE */
(void)kvm_read(kd, (u_long)proc.p_thread.td_mtxname,
if (mainthread.td_mtxname) /* XXXKSE */
(void)kvm_read(kd, (u_long)mainthread.td_mtxname,
kp->ki_mtxname, MTXNAMELEN);
kp->ki_mtxname[MTXNAMELEN] = 0;
}
@ -318,7 +325,7 @@ kvm_proclist(kd, what, arg, p, bp, maxcnt)
kp->ki_swtime = proc.p_swtime;
kp->ki_flag = proc.p_flag;
kp->ki_sflag = proc.p_sflag;
kp->ki_wchan = proc.p_thread.td_wchan; /* XXXKSE */
kp->ki_wchan = mainthread.td_wchan; /* XXXKSE */
kp->ki_traceflag = proc.p_traceflag;
kp->ki_stat = proc.p_stat;
kp->ki_pri = proc.p_ksegrp.kg_pri; /* XXXKSE */
@ -326,7 +333,7 @@ kvm_proclist(kd, what, arg, p, bp, maxcnt)
kp->ki_lock = proc.p_lock;
kp->ki_rqindex = proc.p_kse.ke_rqindex; /* XXXKSE */
kp->ki_oncpu = proc.p_kse.ke_oncpu; /* XXXKSE */
kp->ki_lastcpu = proc.p_thread.td_lastcpu; /* XXXKSE */
kp->ki_lastcpu = mainthread.td_lastcpu; /* XXXKSE */
bcopy(&kinfo_proc, bp, sizeof(kinfo_proc));
++bp;
++cnt;