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Add missing thread suspension/resumption code, fix a bug in pt_thr_sstep,

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don't overwrite other debug flags.
This commit is contained in:
David Xu 2004-08-01 04:57:04 +00:00
parent 6cc695d3b2
commit 447d36ec16
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=132951
1 changed files with 115 additions and 11 deletions
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126
lib/libthread_db/libpthread_db.c
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@ -406,18 +406,110 @@ pt_ta_event_getmsg(const td_thragent_t *ta, td_event_msg_t *msg)
return (TD_NOMSG);
}
static td_err_e
pt_dbsuspend(const td_thrhandle_t *th, int suspend)
{
td_thragent_t *ta = (td_thragent_t *)th->th_ta;
psaddr_t tcb_addr, tmbx_addr, ptr;
lwpid_t lwp;
uint32_t dflags;
int attrflags;
int ret;
TDBG_FUNC();
ret = pt_validate(th);
if (ret)
return (ret);
if (ta->map[th->th_tid].type == PT_LWP) {
if (suspend)
ret = ps_lstop(ta->ph, ta->map[th->th_tid].lwp);
else
ret = ps_lcontinue(ta->ph, ta->map[th->th_tid].lwp);
return (P2T(ret));
}
ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
offsetof(struct pthread, attr.flags),
&attrflags, sizeof(attrflags));
if (ret != 0)
return (P2T(ret));
ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
offsetof(struct pthread, tcb),
&tcb_addr, sizeof(tcb_addr));
if (ret != 0)
return (P2T(ret));
tmbx_addr = tcb_addr + offsetof(struct tcb, tcb_tmbx);
ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
if (ret != 0)
return (P2T(ret));
/*
* Don't stop lwp assigned to a M:N thread, it belongs
* to UTS, UTS shouldn't be stopped.
*/
if (lwp != 0 && (attrflags & PTHREAD_SCOPE_SYSTEM)) {
/* dont' suspend signal thread */
if (attrflags & THR_SIGNAL_THREAD)
return 0;
ptr = ta->map[th->th_tid].thr +
offsetof(struct pthread, kse);
/* Too many indirect level :-( */
/* read struct kse * */
ret = ps_pread(ta->ph, ptr, &ptr, sizeof(ptr));
if (ret != 0)
return (P2T(ret));
ptr = ptr + offsetof(struct kse, k_kcb);
/* read k_kcb * */
ret = ps_pread(ta->ph, ptr, &ptr, sizeof(ptr));
if (ret != 0)
return (P2T(ret));
/* read kcb.kcb_kmbx.km_curthread */
ptr = ptr + offsetof(struct kcb, kcb_kmbx.km_curthread);
ret = ps_pread(ta->ph, ptr, &ptr, sizeof(ptr));
if (ret != 0)
return (P2T(ret));
if (ptr != 0) { /* not in critical */
if (suspend)
ret = ps_lstop(ta->ph, lwp);
else
ret = ps_lcontinue(ta->ph, lwp);
if (ret != 0)
return (P2T(ret));
}
/* FALLTHROUGH */
}
/* read tm_dflags */
ret = ps_pread(ta->ph,
tmbx_addr + offsetof(struct kse_thr_mailbox, tm_dflags),
&dflags, sizeof(dflags));
if (ret != 0)
return (P2T(ret));
if (suspend)
dflags |= TMDF_DONOTRUNUSER;
else
dflags &= ~TMDF_DONOTRUNUSER;
ret = ps_pwrite(ta->ph,
tmbx_addr + offsetof(struct kse_thr_mailbox, tm_dflags),
&dflags, sizeof(dflags));
return (P2T(ret));
}
static td_err_e
pt_thr_dbresume(const td_thrhandle_t *th)
{
TDBG_FUNC();
return (TD_ERR);
return pt_dbsuspend(th, 0);
}
static td_err_e
pt_thr_dbsuspend(const td_thrhandle_t *th)
{
TDBG_FUNC();
return (TD_ERR);
return pt_dbsuspend(th, 1);
}
static td_err_e
@ -430,7 +522,7 @@ pt_thr_validate(const td_thrhandle_t *th)
ret = pt_ta_map_id2thr(th->th_ta, th->th_tid,
&temp);
return (P2T(ret));
return (ret);
}
static td_err_e
@ -439,6 +531,7 @@ pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
const td_thragent_t *ta = th->th_ta;
struct pthread pt;
int ret;
uint32_t dflags;
TDBG_FUNC();
@ -467,7 +560,11 @@ pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
&info->ti_lid, sizeof(lwpid_t));
if (ret != 0)
return (P2T(ret));
ret = ps_pread(ta->ph,
((psaddr_t)pt.tcb) + offsetof(struct tcb, tcb_tmbx.tm_dflags),
&dflags, sizeof(dflags));
if (ret != 0)
return (P2T(ret));
info->ti_ta_p = th->th_ta;
info->ti_tid = th->th_tid;
info->ti_tls = (char *)pt.specific;
@ -497,7 +594,7 @@ pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
break;
}
info->ti_db_suspended = 0;
info->ti_db_suspended = ((dflags & TMDF_DONOTRUNUSER) != 0);
info->ti_type = TD_THR_USER;
info->ti_pri = pt.active_priority;
info->ti_sigmask = pt.sigmask;
@ -528,8 +625,8 @@ pt_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *fpregs)
}
ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
offsetof(struct pthread, tcb),
&tcb_addr, sizeof(tcb_addr));
offsetof(struct pthread, tcb),
&tcb_addr, sizeof(tcb_addr));
if (ret != 0)
return (P2T(ret));
tmbx_addr = tcb_addr + offsetof(struct tcb, tcb_tmbx);
@ -720,7 +817,7 @@ pt_thr_sstep(const td_thrhandle_t *th, int step)
struct kse_thr_mailbox tmbx;
struct reg regs;
psaddr_t tcb_addr, tmbx_addr;
uint32_t tmp;
uint32_t dflags;
lwpid_t lwp;
int ret;
@ -740,9 +837,16 @@ pt_thr_sstep(const td_thrhandle_t *th, int step)
return (P2T(ret));
/* Clear or set single step flag in thread mailbox */
tmp = step ? TMDF_SSTEP : 0;
ret = ps_pread(ta->ph, tcb_addr + offsetof(struct tcb,
tcb_tmbx.tm_dflags), &dflags, sizeof(uint32_t));
if (ret != 0)
return (P2T(ret));
if (step != 0)
dflags |= TMDF_SSTEP;
else
dflags &= ~TMDF_SSTEP;
ret = ps_pwrite(ta->ph, tcb_addr + offsetof(struct tcb,
tcb_tmbx.tm_dflags), &tmp, sizeof(tmp));
tcb_tmbx.tm_dflags), &dflags, sizeof(uint32_t));
if (ret != 0)
return (P2T(ret));
/* Get lwp */
@ -751,7 +855,7 @@ pt_thr_sstep(const td_thrhandle_t *th, int step)
if (ret != 0)
return (P2T(ret));
if (lwp != 0)
return (TD_BADTH);
return (0);
tmbx_addr = tcb_addr + offsetof(struct tcb, tcb_tmbx);
/*