diff options
Diffstat (limited to 'sys/kern/kern_kse.c')
| -rw-r--r-- | sys/kern/kern_kse.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/sys/kern/kern_kse.c b/sys/kern/kern_kse.c index e5ae121..8f8585c 100644 --- a/sys/kern/kern_kse.c +++ b/sys/kern/kern_kse.c @@ -148,7 +148,9 @@ kse_switchin(struct thread *td, struct kse_switchin_args *uap) td->td_mailbox = uap->tmbx; td->td_pflags |= TDP_CAN_UNBIND; } + PROC_LOCK(td->td_proc); if (td->td_proc->p_flag & P_TRACED) { + _PHOLD(td->td_proc); if (tmbx.tm_dflags & TMDF_SSTEP) ptrace_single_step(td); else @@ -160,7 +162,9 @@ kse_switchin(struct thread *td, struct kse_switchin_args *uap) ku->ku_flags |= KUF_DOUPCALL; mtx_unlock_spin(&sched_lock); } + _PRELE(td->td_proc); } + PROC_UNLOCK(td->td_proc); } return ((error == 0) ? EJUSTRETURN : error); } @@ -782,8 +786,13 @@ kse_create(struct thread *td, struct kse_create_args *uap) */ cpu_set_upcall_kse(newtd, newku->ku_func, newku->ku_mailbox, &newku->ku_stack); - if (p->p_flag & P_TRACED) + PROC_LOCK(p); + if (p->p_flag & P_TRACED) { + _PHOLD(p); ptrace_clear_single_step(newtd); + _PRELE(p); + } + PROC_UNLOCK(p); } } @@ -1376,8 +1385,13 @@ thread_userret(struct thread *td, struct trapframe *frame) if (!(ku->ku_mflags & KMF_NOUPCALL)) { cpu_set_upcall_kse(td, ku->ku_func, ku->ku_mailbox, &ku->ku_stack); - if (p->p_flag & P_TRACED) + PROC_LOCK(p); + if (p->p_flag & P_TRACED) { + _PHOLD(p); ptrace_clear_single_step(td); + _PRELE(p); + } + PROC_UNLOCK(p); error = suword32(&ku->ku_mailbox->km_lwp, td->td_tid); if (error) |
