darwin-nat.c: handle Darwin 16 (aka Sierra).
Support message from new task and dead name notification on task of an existing process. With Sierra, exec(2) terminate the current task and creates a new one. 'set startup-with-shell off' must still be used on Darwin 16. 2016-11-09 Tristan Gingold <gingold@adacore.com> * darwin-nat.c (find_inferior_task_it): Fix indentation. (find_inferior_notify_it): Remove. (find_inferior_pid_it): New function. (darwin_find_inferior_by_notify): Remove. (darwin_find_inferior_by_pid): New function. (darwin_find_new_inferior): New function. (darwin_check_message_ndr): New function from darwin_decode_exception_message. (darwin_decode_exception_message): Call darwin_check_message_ndr. Handle SIGTRAP addressed to an unknown task (when a task spawned). (darwin_decode_notify_message): New function. (darwin_decode_message): Handle unknown task. (darwin_deallocate_threads): New function from darwin_mourn_inferior. (darwin_mourn_inferior): Use darwin_deallocate_threads and darwin_deallocate_exception_ports. (darwin_deallocate_exception_ports): New function from darwin_mourn_inferior. (darwin_setup_exceptions): New function from darwin_attach_pid. (darwin_setup_request_notification): Likewise. (darwin_attach_pid): Call darwin_setup_request_notification and darwin_setup_request_notification.
This commit is contained in:
Tristan Gingold
parent
4c1d4908aa
commit
82b19a4d2f
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@ -1,3 +1,27 @@
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2016-11-09 Tristan Gingold <gingold@adacore.com>
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* darwin-nat.c (find_inferior_task_it): Fix indentation.
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(find_inferior_notify_it): Remove.
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(find_inferior_pid_it): New function.
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(darwin_find_inferior_by_notify): Remove.
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(darwin_find_inferior_by_pid): New function.
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(darwin_find_new_inferior): New function.
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(darwin_check_message_ndr): New function from
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darwin_decode_exception_message.
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(darwin_decode_exception_message): Call darwin_check_message_ndr.
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Handle SIGTRAP addressed to an unknown task (when a task spawned).
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(darwin_decode_notify_message): New function.
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(darwin_decode_message): Handle unknown task.
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(darwin_deallocate_threads): New function from darwin_mourn_inferior.
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(darwin_mourn_inferior): Use darwin_deallocate_threads and
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darwin_deallocate_exception_ports.
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(darwin_deallocate_exception_ports): New function from
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darwin_mourn_inferior.
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(darwin_setup_exceptions): New function from darwin_attach_pid.
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(darwin_setup_request_notification): Likewise.
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(darwin_attach_pid): Call darwin_setup_request_notification and
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darwin_setup_request_notification.
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2016-11-08 Tom Tromey <tom@tromey.com>
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* python/py-framefilter.c (py_print_frame): Use
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344
gdb/darwin-nat.c
344
gdb/darwin-nat.c
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@ -114,6 +114,11 @@ static int darwin_thread_alive (struct target_ops *ops, ptid_t tpid);
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static void darwin_encode_reply (mig_reply_error_t *reply,
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mach_msg_header_t *hdr, integer_t code);
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static void darwin_setup_request_notification (struct inferior *inf);
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static void darwin_deallocate_exception_ports (darwin_inferior *inf);
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static void darwin_setup_exceptions (struct inferior *inf);
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static void darwin_deallocate_threads (struct inferior *inf);
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/* Target operations for Darwin. */
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static struct target_ops *darwin_ops;
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@ -320,6 +325,7 @@ darwin_check_new_threads (struct inferior *inf)
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}
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}
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/* Full handling: detect new threads, remove dead threads. */
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thread_vec = VEC_alloc (darwin_thread_t, new_nbr);
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for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;)
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@ -365,15 +371,22 @@ darwin_check_new_threads (struct inferior *inf)
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pti->gdb_port = new_id;
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pti->msg_state = DARWIN_RUNNING;
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/* Add a new thread unless this is the first one ever met. */
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if (!(old_nbr == 0 && new_ix == 0))
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tp = add_thread_with_info (ptid_build (inf->pid, 0, new_id), pti);
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else
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if (old_nbr == 0 && new_ix == 0)
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{
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/* A ptid is create when the inferior is started (see
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fork-child.c) with lwp=tid=0. This ptid will be renamed
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later by darwin_init_thread_list (). */
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tp = find_thread_ptid (ptid_build (inf->pid, 0, 0));
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gdb_assert (tp);
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gdb_assert (tp->priv == NULL);
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tp->priv = pti;
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}
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else
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{
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/* Add the new thread. */
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tp = add_thread_with_info
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(ptid_build (inf->pid, 0, new_id), pti);
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}
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VEC_safe_push (darwin_thread_t, thread_vec, pti);
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new_ix++;
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continue;
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@ -403,13 +416,13 @@ darwin_check_new_threads (struct inferior *inf)
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static int
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find_inferior_task_it (struct inferior *inf, void *port_ptr)
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{
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return inf->priv->task == *(task_t*)port_ptr;
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return inf->priv->task == *(task_t *)port_ptr;
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}
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static int
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find_inferior_notify_it (struct inferior *inf, void *port_ptr)
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find_inferior_pid_it (struct inferior *inf, void *pid_ptr)
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{
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return inf->priv->notify_port == *(task_t*)port_ptr;
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return inf->pid == *(int *)pid_ptr;
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}
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/* Return an inferior by task port. */
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@ -419,11 +432,11 @@ darwin_find_inferior_by_task (task_t port)
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return iterate_over_inferiors (&find_inferior_task_it, &port);
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}
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/* Return an inferior by notification port. */
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/* Return an inferior by pid port. */
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static struct inferior *
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darwin_find_inferior_by_notify (mach_port_t port)
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darwin_find_inferior_by_pid (int pid)
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{
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return iterate_over_inferiors (&find_inferior_notify_it, &port);
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return iterate_over_inferiors (&find_inferior_pid_it, &pid);
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}
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/* Return a thread by port. */
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@ -557,6 +570,69 @@ darwin_dump_message (mach_msg_header_t *hdr, int disp_body)
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}
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}
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/* Adjust inferior data when a new task was created. */
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static struct inferior *
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darwin_find_new_inferior (task_t task_port, thread_t thread_port)
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{
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int task_pid;
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struct inferior *inf;
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kern_return_t kret;
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mach_port_t prev;
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/* Find the corresponding pid. */
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kret = pid_for_task (task_port, &task_pid);
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if (kret != KERN_SUCCESS)
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{
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MACH_CHECK_ERROR (kret);
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return NULL;
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}
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/* Find the inferior for this pid. */
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inf = darwin_find_inferior_by_pid (task_pid);
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if (inf == NULL)
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return NULL;
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/* Deallocate saved exception ports. */
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darwin_deallocate_exception_ports (inf->priv);
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/* No need to remove dead_name notification, but still... */
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kret = mach_port_request_notification (gdb_task, inf->priv->task,
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MACH_NOTIFY_DEAD_NAME, 0,
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MACH_PORT_NULL,
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MACH_MSG_TYPE_MAKE_SEND_ONCE,
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&prev);
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if (kret != KERN_INVALID_ARGUMENT)
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MACH_CHECK_ERROR (kret);
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/* Replace old task port. */
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kret = mach_port_deallocate (gdb_task, inf->priv->task);
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MACH_CHECK_ERROR (kret);
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inf->priv->task = task_port;
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darwin_setup_request_notification (inf);
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darwin_setup_exceptions (inf);
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return inf;
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}
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/* Check data representation. */
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static int
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darwin_check_message_ndr (NDR_record_t *ndr)
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{
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if (ndr->mig_vers != NDR_PROTOCOL_2_0
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|| ndr->if_vers != NDR_PROTOCOL_2_0
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|| ndr->mig_encoding != NDR_record.mig_encoding
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|| ndr->int_rep != NDR_record.int_rep
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|| ndr->char_rep != NDR_record.char_rep
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|| ndr->float_rep != NDR_record.float_rep)
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return -1;
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return 0;
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}
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/* Decode an exception message. */
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static int
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darwin_decode_exception_message (mach_msg_header_t *hdr,
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struct inferior **pinf,
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@ -593,12 +669,7 @@ darwin_decode_exception_message (mach_msg_header_t *hdr,
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/* Check data representation. */
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ndr = (NDR_record_t *)(desc + 2);
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if (ndr->mig_vers != NDR_PROTOCOL_2_0
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|| ndr->if_vers != NDR_PROTOCOL_2_0
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|| ndr->mig_encoding != NDR_record.mig_encoding
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|| ndr->int_rep != NDR_record.int_rep
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|| ndr->char_rep != NDR_record.char_rep
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|| ndr->float_rep != NDR_record.float_rep)
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if (darwin_check_message_ndr (ndr) != 0)
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return -1;
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/* Ok, the hard work. */
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@ -607,14 +678,33 @@ darwin_decode_exception_message (mach_msg_header_t *hdr,
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task_port = desc[1].name;
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thread_port = desc[0].name;
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/* We got new rights to the task, get rid of it. Do not get rid of thread
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right, as we will need it to find the thread. */
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kret = mach_port_deallocate (mach_task_self (), task_port);
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MACH_CHECK_ERROR (kret);
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/* Find process by port. */
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inf = darwin_find_inferior_by_task (task_port);
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*pinf = inf;
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if (inf == NULL && data[0] == EXC_SOFTWARE && data[1] == 2
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&& data[2] == EXC_SOFT_SIGNAL && data[3] == SIGTRAP)
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{
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/* Not a known inferior, but a sigtrap. This happens on darwin 16.1.0,
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as a new Mach task is created when a process exec. */
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inf = darwin_find_new_inferior (task_port, thread_port);
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*pinf = inf;
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if (inf == NULL)
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{
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/* Deallocate task_port, unless it was saved. */
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kret = mach_port_deallocate (mach_task_self (), task_port);
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MACH_CHECK_ERROR (kret);
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}
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}
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else
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{
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/* We got new rights to the task, get rid of it. Do not get rid of
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thread right, as we will need it to find the thread. */
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kret = mach_port_deallocate (mach_task_self (), task_port);
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MACH_CHECK_ERROR (kret);
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}
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if (inf == NULL)
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{
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/* Not a known inferior. This could happen if the child fork, as
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@ -623,6 +713,10 @@ darwin_decode_exception_message (mach_msg_header_t *hdr,
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kern_return_t kret;
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mig_reply_error_t reply;
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inferior_debug
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(4, _("darwin_decode_exception_message: unknown task 0x%x\n"),
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task_port);
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/* Free thread port (we don't know it). */
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kret = mach_port_deallocate (mach_task_self (), thread_port);
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MACH_CHECK_ERROR (kret);
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@ -676,6 +770,45 @@ darwin_decode_exception_message (mach_msg_header_t *hdr,
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return 0;
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}
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/* Decode dead_name notify message. */
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static int
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darwin_decode_notify_message (mach_msg_header_t *hdr, struct inferior **pinf)
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{
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NDR_record_t *ndr = (NDR_record_t *)(hdr + 1);
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integer_t *data = (integer_t *)(ndr + 1);
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struct inferior *inf;
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darwin_thread_t *thread;
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task_t task_port;
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thread_t thread_port;
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kern_return_t kret;
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int i;
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/* Check message header. */
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if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)
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return -1;
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/* Check descriptors. */
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if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*ndr) + sizeof (integer_t)))
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return -2;
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/* Check data representation. */
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if (darwin_check_message_ndr (ndr) != 0)
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return -3;
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task_port = data[0];
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/* Find process by port. */
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inf = darwin_find_inferior_by_task (task_port);
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*pinf = inf;
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/* Check message destination. */
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if (inf != NULL && hdr->msgh_local_port != inf->priv->notify_port)
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return -4;
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return 0;
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}
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static void
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darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr,
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integer_t code)
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@ -986,10 +1119,27 @@ darwin_decode_message (mach_msg_header_t *hdr,
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else if (hdr->msgh_id == 0x48)
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{
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/* MACH_NOTIFY_DEAD_NAME: notification for exit. */
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int res;
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res = darwin_decode_notify_message (hdr, &inf);
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if (res < 0)
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{
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/* Should not happen... */
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printf_unfiltered
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(_("darwin_wait: ill-formatted message (id=0x%x, res=%d)\n"),
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hdr->msgh_id, res);
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}
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*pinf = NULL;
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*pthread = NULL;
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inf = darwin_find_inferior_by_notify (hdr->msgh_local_port);
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if (res < 0 || inf == NULL)
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{
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status->kind = TARGET_WAITKIND_IGNORE;
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return minus_one_ptid;
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}
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if (inf != NULL)
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{
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if (!inf->priv->no_ptrace)
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@ -1022,7 +1172,8 @@ darwin_decode_message (mach_msg_header_t *hdr,
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/* Looks necessary on Leopard and harmless... */
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wait4 (inf->pid, &wstatus, 0, NULL);
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return ptid_build (inf->pid, 0, 0);
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inferior_ptid = ptid_build (inf->pid, 0, 0);
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return inferior_ptid;
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}
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else
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{
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@ -1204,17 +1355,14 @@ darwin_interrupt (struct target_ops *self, ptid_t t)
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kill (inf->pid, SIGINT);
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}
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static void
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darwin_mourn_inferior (struct target_ops *ops)
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{
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struct inferior *inf = current_inferior ();
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kern_return_t kret;
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mach_port_t prev;
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int i;
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/* Deallocate threads port and vector. */
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/* Deallocate threads. */
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static void
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darwin_deallocate_threads (struct inferior *inf)
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{
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if (inf->priv->threads)
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{
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kern_return_t kret;
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int k;
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darwin_thread_t *t;
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for (k = 0;
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@ -1227,11 +1375,25 @@ darwin_mourn_inferior (struct target_ops *ops)
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VEC_free (darwin_thread_t, inf->priv->threads);
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inf->priv->threads = NULL;
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}
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}
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static void
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darwin_mourn_inferior (struct target_ops *ops)
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{
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struct inferior *inf = current_inferior ();
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kern_return_t kret;
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mach_port_t prev;
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int i;
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/* Deallocate threads. */
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darwin_deallocate_threads (inf);
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/* Remove notify_port from darwin_port_set. */
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kret = mach_port_move_member (gdb_task,
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inf->priv->notify_port, MACH_PORT_NULL);
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MACH_CHECK_ERROR (kret);
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/* Remove task port dead_name notification. */
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kret = mach_port_request_notification (gdb_task, inf->priv->task,
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MACH_NOTIFY_DEAD_NAME, 0,
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MACH_PORT_NULL,
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@ -1247,19 +1409,14 @@ darwin_mourn_inferior (struct target_ops *ops)
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MACH_CHECK_ERROR (kret);
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}
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/* Destroy notify_port. */
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kret = mach_port_destroy (gdb_task, inf->priv->notify_port);
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MACH_CHECK_ERROR (kret);
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/* Deallocate saved exception ports. */
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for (i = 0; i < inf->priv->exception_info.count; i++)
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{
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kret = mach_port_deallocate
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(gdb_task, inf->priv->exception_info.ports[i]);
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MACH_CHECK_ERROR (kret);
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}
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inf->priv->exception_info.count = 0;
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darwin_deallocate_exception_ports (inf->priv);
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/* Deallocate task port. */
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kret = mach_port_deallocate (gdb_task, inf->priv->task);
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MACH_CHECK_ERROR (kret);
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@ -1349,6 +1506,48 @@ darwin_restore_exception_ports (darwin_inferior *inf)
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return KERN_SUCCESS;
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}
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/* Deallocate saved exception ports. */
|
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static void
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darwin_deallocate_exception_ports (darwin_inferior *inf)
|
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{
|
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int i;
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kern_return_t kret;
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for (i = 0; i < inf->exception_info.count; i++)
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{
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kret = mach_port_deallocate (gdb_task, inf->exception_info.ports[i]);
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MACH_CHECK_ERROR (kret);
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}
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inf->exception_info.count = 0;
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}
|
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|
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static void
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darwin_setup_exceptions (struct inferior *inf)
|
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{
|
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kern_return_t kret;
|
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int traps_expected;
|
||||
exception_mask_t mask;
|
||||
|
||||
kret = darwin_save_exception_ports (inf->priv);
|
||||
if (kret != KERN_SUCCESS)
|
||||
error (_("Unable to save exception ports, task_get_exception_ports"
|
||||
"returned: %d"),
|
||||
kret);
|
||||
|
||||
/* Set exception port. */
|
||||
if (enable_mach_exceptions)
|
||||
mask = EXC_MASK_ALL;
|
||||
else
|
||||
mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT;
|
||||
kret = task_set_exception_ports (inf->priv->task, mask, darwin_ex_port,
|
||||
EXCEPTION_DEFAULT, THREAD_STATE_NONE);
|
||||
if (kret != KERN_SUCCESS)
|
||||
error (_("Unable to set exception ports, task_set_exception_ports"
|
||||
"returned: %d"),
|
||||
kret);
|
||||
}
|
||||
|
||||
static void
|
||||
darwin_kill_inferior (struct target_ops *ops)
|
||||
{
|
||||
|
|
@ -1384,6 +1583,34 @@ darwin_kill_inferior (struct target_ops *ops)
|
|||
target_mourn_inferior (inferior_ptid);
|
||||
}
|
||||
|
||||
static void
|
||||
darwin_setup_request_notification (struct inferior *inf)
|
||||
{
|
||||
kern_return_t kret;
|
||||
mach_port_t prev_not;
|
||||
|
||||
kret = mach_port_request_notification (gdb_task, inf->priv->task,
|
||||
MACH_NOTIFY_DEAD_NAME, 0,
|
||||
inf->priv->notify_port,
|
||||
MACH_MSG_TYPE_MAKE_SEND_ONCE,
|
||||
&prev_not);
|
||||
if (kret != KERN_SUCCESS)
|
||||
error (_("Termination notification request failed, "
|
||||
"mach_port_request_notification\n"
|
||||
"returned: %d"),
|
||||
kret);
|
||||
if (prev_not != MACH_PORT_NULL)
|
||||
{
|
||||
/* This is unexpected, as there should not be any previously
|
||||
registered notification request. But this is not a fatal
|
||||
issue, so just emit a warning. */
|
||||
warning (_("\
|
||||
A task termination request was registered before the debugger registered\n\
|
||||
its own. This is unexpected, but should otherwise not have any actual\n\
|
||||
impact on the debugging session."));
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
darwin_attach_pid (struct inferior *inf)
|
||||
{
|
||||
|
|
@ -1463,44 +1690,9 @@ darwin_attach_pid (struct inferior *inf)
|
|||
"returned: %d"),
|
||||
kret);
|
||||
|
||||
kret = mach_port_request_notification (gdb_task, inf->priv->task,
|
||||
MACH_NOTIFY_DEAD_NAME, 0,
|
||||
inf->priv->notify_port,
|
||||
MACH_MSG_TYPE_MAKE_SEND_ONCE,
|
||||
&prev_not);
|
||||
if (kret != KERN_SUCCESS)
|
||||
error (_("Termination notification request failed, "
|
||||
"mach_port_request_notification\n"
|
||||
"returned: %d"),
|
||||
kret);
|
||||
if (prev_not != MACH_PORT_NULL)
|
||||
{
|
||||
/* This is unexpected, as there should not be any previously
|
||||
registered notification request. But this is not a fatal
|
||||
issue, so just emit a warning. */
|
||||
warning (_("\
|
||||
A task termination request was registered before the debugger registered\n\
|
||||
its own. This is unexpected, but should otherwise not have any actual\n\
|
||||
impact on the debugging session."));
|
||||
}
|
||||
darwin_setup_request_notification (inf);
|
||||
|
||||
kret = darwin_save_exception_ports (inf->priv);
|
||||
if (kret != KERN_SUCCESS)
|
||||
error (_("Unable to save exception ports, task_get_exception_ports"
|
||||
"returned: %d"),
|
||||
kret);
|
||||
|
||||
/* Set exception port. */
|
||||
if (enable_mach_exceptions)
|
||||
mask = EXC_MASK_ALL;
|
||||
else
|
||||
mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT;
|
||||
kret = task_set_exception_ports (inf->priv->task, mask, darwin_ex_port,
|
||||
EXCEPTION_DEFAULT, THREAD_STATE_NONE);
|
||||
if (kret != KERN_SUCCESS)
|
||||
error (_("Unable to set exception ports, task_set_exception_ports"
|
||||
"returned: %d"),
|
||||
kret);
|
||||
darwin_setup_exceptions (inf);
|
||||
|
||||
if (!target_is_pushed (darwin_ops))
|
||||
push_target (darwin_ops);
|
||||
|
|
|
|||
Loading…
Reference in New Issue