Lines Matching full:child
67 void __ptrace_link(struct task_struct *child, struct task_struct *new_parent,
70 BUG_ON(!list_empty(&child->ptrace_entry));
71 list_add(&child->ptrace_entry, &new_parent->ptraced);
72 child->parent = new_parent;
73 child->ptracer_cred = get_cred(ptracer_cred);
82 static void ptrace_link(struct task_struct *child, struct task_struct *new_parent)
84 __ptrace_link(child, new_parent, current_cred());
89 * @child: ptracee to be unlinked
91 * Remove @child from the ptrace list, move it back to the original parent,
115 void __ptrace_unlink(struct task_struct *child)
118 BUG_ON(!child->ptrace);
120 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
122 clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
125 child->parent = child->real_parent;
126 list_del_init(&child->ptrace_entry);
127 old_cred = child->ptracer_cred;
128 child->ptracer_cred = NULL;
131 spin_lock(&child->sighand->siglock);
132 child->ptrace = 0;
137 task_clear_jobctl_pending(child, JOBCTL_TRAP_MASK);
138 task_clear_jobctl_trapping(child);
142 * @child isn't dead.
144 if (!(child->flags & PF_EXITING) &&
145 (child->signal->flags & SIGNAL_STOP_STOPPED ||
146 child->signal->group_stop_count)) {
147 child->jobctl |= JOBCTL_STOP_PENDING;
156 if (!(child->jobctl & JOBCTL_STOP_SIGMASK))
157 child->jobctl |= SIGSTOP;
162 * @child in the butt. Note that @resume should be used iff @child
166 if (child->jobctl & JOBCTL_STOP_PENDING || task_is_traced(child))
167 ptrace_signal_wake_up(child, true);
169 spin_unlock(&child->sighand->siglock);
230 * @child: ptracee to check for
231 * @ignore_state: don't check whether @child is currently %TASK_TRACED
233 * Check whether @child is being ptraced by %current and ready for further
234 * ptrace operations. If @ignore_state is %false, @child also should be in
235 * %TASK_TRACED state and on return the child is guaranteed to be traced
236 * and not executing. If @ignore_state is %true, @child can be in any
240 * Grabs and releases tasklist_lock and @child->sighand->siglock.
243 * 0 on success, -ESRCH if %child is not ready.
245 static int ptrace_check_attach(struct task_struct *child, bool ignore_state)
251 * possible race where someone else was tracing our child and
253 * we are sure that this is our traced child and that can only
257 if (child->ptrace && child->parent == current) {
258 WARN_ON(child->state == __TASK_TRACED);
260 * child->sighand can't be NULL, release_task()
263 if (ignore_state || ptrace_freeze_traced(child))
269 if (!wait_task_inactive(child, __TASK_TRACED)) {
275 WARN_ON(child->state == __TASK_TRACED);
308 * because setting up the necessary parent/child relationship
464 * will be cleared if the child completes the transition or any
557 * If it's our own child, there is no notification to do. But if our normal
558 * children self-reap, then this child was prevented by ptrace and we must
587 static int ptrace_detach(struct task_struct *child, unsigned int data)
593 ptrace_disable(child);
600 WARN_ON(!child->ptrace || child->exit_state);
605 child->exit_code = data;
606 __ptrace_detach(current, child);
609 proc_ptrace_connector(child, PTRACE_DETACH);
683 static int ptrace_setoptions(struct task_struct *child, unsigned long data)
693 flags = child->ptrace;
696 child->ptrace = flags;
701 static int ptrace_getsiginfo(struct task_struct *child, kernel_siginfo_t *info)
706 if (lock_task_sighand(child, &flags)) {
708 if (likely(child->last_siginfo != NULL)) {
709 copy_siginfo(info, child->last_siginfo);
712 unlock_task_sighand(child, &flags);
717 static int ptrace_setsiginfo(struct task_struct *child, const kernel_siginfo_t *info)
722 if (lock_task_sighand(child, &flags)) {
724 if (likely(child->last_siginfo != NULL)) {
725 copy_siginfo(child->last_siginfo, info);
728 unlock_task_sighand(child, &flags);
733 static int ptrace_peek_siginfo(struct task_struct *child,
758 pending = &child->signal->shared_pending;
760 pending = &child->pending;
767 spin_lock_irq(&child->sighand->siglock);
775 spin_unlock_irq(&child->sighand->siglock);
833 static int ptrace_resume(struct task_struct *child, long request,
842 set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
844 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
848 set_tsk_thread_flag(child, TIF_SYSCALL_EMU);
850 clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
856 user_enable_block_step(child);
860 user_enable_single_step(child);
862 user_disable_single_step(child);
880 spin_lock_irq(&child->sighand->siglock);
881 child->exit_code = data;
882 wake_up_state(child, __TASK_TRACED);
884 spin_unlock_irq(&child->sighand->siglock);
936 ptrace_get_syscall_info_entry(struct task_struct *child, struct pt_regs *regs,
943 info->entry.nr = syscall_get_nr(child, regs);
944 syscall_get_arguments(child, regs, args);
953 ptrace_get_syscall_info_seccomp(struct task_struct *child, struct pt_regs *regs,
963 ptrace_get_syscall_info_entry(child, regs, info);
965 info->seccomp.ret_data = child->ptrace_message;
972 ptrace_get_syscall_info_exit(struct task_struct *child, struct pt_regs *regs,
976 info->exit.rval = syscall_get_error(child, regs);
979 info->exit.rval = syscall_get_return_value(child, regs);
986 ptrace_get_syscall_info(struct task_struct *child, unsigned long user_size,
989 struct pt_regs *regs = task_pt_regs(child);
992 .arch = syscall_get_arch(child),
1001 * child->last_siginfo because ptrace_freeze_traced()
1005 switch (child->last_siginfo ? child->last_siginfo->si_code : 0) {
1007 switch (child->ptrace_message) {
1009 actual_size = ptrace_get_syscall_info_entry(child, regs,
1013 actual_size = ptrace_get_syscall_info_exit(child, regs,
1019 actual_size = ptrace_get_syscall_info_seccomp(child, regs,
1029 int ptrace_request(struct task_struct *child, long request,
1032 bool seized = child->ptrace & PT_SEIZED;
1042 return generic_ptrace_peekdata(child, addr, data);
1045 return generic_ptrace_pokedata(child, addr, data);
1051 ret = ptrace_setoptions(child, data);
1054 ret = put_user(child->ptrace_message, datalp);
1058 ret = ptrace_peek_siginfo(child, addr, data);
1062 ret = ptrace_getsiginfo(child, &siginfo);
1070 ret = ptrace_setsiginfo(child, &siginfo);
1081 if (test_tsk_restore_sigmask(child))
1082 mask = &child->saved_sigmask;
1084 mask = &child->blocked;
1114 spin_lock_irq(&child->sighand->siglock);
1115 child->blocked = new_set;
1116 spin_unlock_irq(&child->sighand->siglock);
1118 clear_tsk_restore_sigmask(child);
1128 * after this request. If @child is already trapped, the
1135 if (unlikely(!seized || !lock_task_sighand(child, &flags)))
1144 if (likely(task_set_jobctl_pending(child, JOBCTL_TRAP_STOP)))
1145 ptrace_signal_wake_up(child, child->jobctl & JOBCTL_LISTENING);
1147 unlock_task_sighand(child, &flags);
1160 if (unlikely(!seized || !lock_task_sighand(child, &flags)))
1163 si = child->last_siginfo;
1165 child->jobctl |= JOBCTL_LISTENING;
1170 if (child->jobctl & JOBCTL_TRAP_NOTIFY)
1171 ptrace_signal_wake_up(child, true);
1174 unlock_task_sighand(child, &flags);
1178 ret = ptrace_detach(child, data);
1183 struct mm_struct *mm = get_task_mm(child);
1219 return ptrace_resume(child, request, data);
1222 send_sig_info(SIGKILL, SEND_SIG_NOINFO, child);
1238 ret = ptrace_regset(child, request, addr, &kiov);
1245 ret = ptrace_get_syscall_info(child, addr, datavp);
1250 ret = seccomp_get_filter(child, addr, datavp);
1254 ret = seccomp_get_metadata(child, addr, datavp);
1265 #define arch_ptrace_attach(child) do { } while (0)
1271 struct task_struct *child;
1281 child = find_get_task_by_vpid(pid);
1282 if (!child) {
1288 ret = ptrace_attach(child, request, addr, data);
1294 arch_ptrace_attach(child);
1298 ret = ptrace_check_attach(child, request == PTRACE_KILL ||
1303 ret = arch_ptrace(child, request, addr, data);
1305 ptrace_unfreeze_traced(child);
1308 put_task_struct(child);
1337 int compat_ptrace_request(struct task_struct *child, compat_long_t request,
1348 ret = ptrace_access_vm(child, addr, &word, sizeof(word),
1358 ret = ptrace_access_vm(child, addr, &data, sizeof(data),
1364 ret = put_user((compat_ulong_t) child->ptrace_message, datap);
1368 ret = ptrace_getsiginfo(child, &siginfo);
1379 ret = ptrace_setsiginfo(child, &siginfo);
1401 ret = ptrace_regset(child, request, addr, &kiov);
1409 ret = ptrace_request(child, request, addr, data);
1418 struct task_struct *child;
1426 child = find_get_task_by_vpid(pid);
1427 if (!child) {
1433 ret = ptrace_attach(child, request, addr, data);
1439 arch_ptrace_attach(child);
1443 ret = ptrace_check_attach(child, request == PTRACE_KILL ||
1446 ret = compat_arch_ptrace(child, request, addr, data);
1448 ptrace_unfreeze_traced(child);
1452 put_task_struct(child);