diff options
Diffstat (limited to 'sys/kern/sys_process.c')
| -rw-r--r-- | sys/kern/sys_process.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/sys/kern/sys_process.c b/sys/kern/sys_process.c index a7f280a..ee36b35 100644 --- a/sys/kern/sys_process.c +++ b/sys/kern/sys_process.c @@ -829,10 +829,22 @@ kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data) case PT_ATTACH: /* security check done above */ + /* + * It would be nice if the tracing relationship was separate + * from the parent relationship but that would require + * another set of links in the proc struct or for "wait" + * to scan the entire proc table. To make life easier, + * we just re-parent the process we're trying to trace. + * The old parent is remembered so we can put things back + * on a "detach". + */ p->p_flag |= P_TRACED; p->p_oppid = p->p_pptr->p_pid; - if (p->p_pptr != td->td_proc) + if (p->p_pptr != td->td_proc) { + /* Remember that a child is being debugged(traced). */ + p->p_pptr->p_dbg_child++; proc_reparent(p, td->td_proc); + } data = SIGSTOP; goto sendsig; /* in PT_CONTINUE below */ @@ -919,11 +931,12 @@ kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data) PROC_UNLOCK(pp); PROC_LOCK(p); proc_reparent(p, pp); + p->p_pptr->p_dbg_child--; if (pp == initproc) p->p_sigparent = SIGCHLD; } - p->p_flag &= ~(P_TRACED | P_WAITED | P_FOLLOWFORK); p->p_oppid = 0; + p->p_flag &= ~(P_TRACED | P_WAITED | P_FOLLOWFORK); /* should we send SIGCHLD? */ /* childproc_continued(p); */ |
