/* Darwin support for GDB, the GNU debugger.
- Copyright (C) 2008-2016 Free Software Foundation, Inc.
+ Copyright (C) 2008-2017 Free Software Foundation, Inc.
Contributed by AdaCore.
#include "darwin-nat.h"
#include "common/filestuff.h"
+#include "nat/fork-inferior.h"
/* Quick overview.
Darwin kernel is Mach + BSD derived kernel. Note that they share the
static void darwin_ptrace_him (int pid);
-static void darwin_create_inferior (struct target_ops *ops, char *exec_file,
- char *allargs, char **env, int from_tty);
+static void darwin_create_inferior (struct target_ops *ops,
+ const char *exec_file,
+ const std::string &allargs,
+ char **env, int from_tty);
static void darwin_files_info (struct target_ops *ops);
-static char *darwin_pid_to_str (struct target_ops *ops, ptid_t tpid);
+static const char *darwin_pid_to_str (struct target_ops *ops, ptid_t tpid);
static int darwin_thread_alive (struct target_ops *ops, ptid_t tpid);
static void darwin_encode_reply (mig_reply_error_t *reply,
mach_msg_header_t *hdr, integer_t code);
+static void darwin_setup_request_notification (struct inferior *inf);
+static void darwin_deallocate_exception_ports (darwin_inferior *inf);
+static void darwin_setup_exceptions (struct inferior *inf);
+static void darwin_deallocate_threads (struct inferior *inf);
+
/* Target operations for Darwin. */
static struct target_ops *darwin_ops;
}
}
+ /* Full handling: detect new threads, remove dead threads. */
thread_vec = VEC_alloc (darwin_thread_t, new_nbr);
for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;)
if (new_ix < new_nbr && (old_ix == old_nbr || new_id < old_id))
{
/* A thread was created. */
- struct thread_info *tp;
struct private_thread_info *pti;
pti = XCNEW (struct private_thread_info);
pti->gdb_port = new_id;
pti->msg_state = DARWIN_RUNNING;
- /* Add a new thread unless this is the first one ever met. */
- if (!(old_nbr == 0 && new_ix == 0))
- tp = add_thread_with_info (ptid_build (inf->pid, 0, new_id), pti);
- else
- {
- tp = find_thread_ptid (ptid_build (inf->pid, 0, 0));
- gdb_assert (tp);
- tp->priv = pti;
- }
+ /* Add the new thread. */
+ add_thread_with_info (ptid_build (inf->pid, 0, new_id), pti);
VEC_safe_push (darwin_thread_t, thread_vec, pti);
new_ix++;
continue;
static int
find_inferior_task_it (struct inferior *inf, void *port_ptr)
{
- return inf->priv->task == *(task_t*)port_ptr;
+ return inf->priv->task == *(task_t *)port_ptr;
}
static int
-find_inferior_notify_it (struct inferior *inf, void *port_ptr)
+find_inferior_pid_it (struct inferior *inf, void *pid_ptr)
{
- return inf->priv->notify_port == *(task_t*)port_ptr;
+ return inf->pid == *(int *)pid_ptr;
}
/* Return an inferior by task port. */
return iterate_over_inferiors (&find_inferior_task_it, &port);
}
-/* Return an inferior by notification port. */
+/* Return an inferior by pid port. */
static struct inferior *
-darwin_find_inferior_by_notify (mach_port_t port)
+darwin_find_inferior_by_pid (int pid)
{
- return iterate_over_inferiors (&find_inferior_notify_it, &port);
+ return iterate_over_inferiors (&find_inferior_pid_it, &pid);
}
/* Return a thread by port. */
}
}
+/* Adjust inferior data when a new task was created. */
+
+static struct inferior *
+darwin_find_new_inferior (task_t task_port, thread_t thread_port)
+{
+ int task_pid;
+ struct inferior *inf;
+ kern_return_t kret;
+ mach_port_t prev;
+
+ /* Find the corresponding pid. */
+ kret = pid_for_task (task_port, &task_pid);
+ if (kret != KERN_SUCCESS)
+ {
+ MACH_CHECK_ERROR (kret);
+ return NULL;
+ }
+
+ /* Find the inferior for this pid. */
+ inf = darwin_find_inferior_by_pid (task_pid);
+ if (inf == NULL)
+ return NULL;
+
+ /* Deallocate saved exception ports. */
+ darwin_deallocate_exception_ports (inf->priv);
+
+ /* No need to remove dead_name notification, but still... */
+ kret = mach_port_request_notification (gdb_task, inf->priv->task,
+ MACH_NOTIFY_DEAD_NAME, 0,
+ MACH_PORT_NULL,
+ MACH_MSG_TYPE_MAKE_SEND_ONCE,
+ &prev);
+ if (kret != KERN_INVALID_ARGUMENT)
+ MACH_CHECK_ERROR (kret);
+
+ /* Replace old task port. */
+ kret = mach_port_deallocate (gdb_task, inf->priv->task);
+ MACH_CHECK_ERROR (kret);
+ inf->priv->task = task_port;
+
+ darwin_setup_request_notification (inf);
+ darwin_setup_exceptions (inf);
+
+ return inf;
+}
+
+/* Check data representation. */
+
+static int
+darwin_check_message_ndr (NDR_record_t *ndr)
+{
+ if (ndr->mig_vers != NDR_PROTOCOL_2_0
+ || ndr->if_vers != NDR_PROTOCOL_2_0
+ || ndr->mig_encoding != NDR_record.mig_encoding
+ || ndr->int_rep != NDR_record.int_rep
+ || ndr->char_rep != NDR_record.char_rep
+ || ndr->float_rep != NDR_record.float_rep)
+ return -1;
+ return 0;
+}
+
+/* Decode an exception message. */
+
static int
darwin_decode_exception_message (mach_msg_header_t *hdr,
struct inferior **pinf,
/* Check data representation. */
ndr = (NDR_record_t *)(desc + 2);
- if (ndr->mig_vers != NDR_PROTOCOL_2_0
- || ndr->if_vers != NDR_PROTOCOL_2_0
- || ndr->mig_encoding != NDR_record.mig_encoding
- || ndr->int_rep != NDR_record.int_rep
- || ndr->char_rep != NDR_record.char_rep
- || ndr->float_rep != NDR_record.float_rep)
+ if (darwin_check_message_ndr (ndr) != 0)
return -1;
/* Ok, the hard work. */
task_port = desc[1].name;
thread_port = desc[0].name;
- /* We got new rights to the task, get rid of it. Do not get rid of thread
- right, as we will need it to find the thread. */
- kret = mach_port_deallocate (mach_task_self (), task_port);
- MACH_CHECK_ERROR (kret);
-
/* Find process by port. */
inf = darwin_find_inferior_by_task (task_port);
*pinf = inf;
+
+ if (inf == NULL && data[0] == EXC_SOFTWARE && data[1] == 2
+ && data[2] == EXC_SOFT_SIGNAL && data[3] == SIGTRAP)
+ {
+ /* Not a known inferior, but a sigtrap. This happens on darwin 16.1.0,
+ as a new Mach task is created when a process exec. */
+ inf = darwin_find_new_inferior (task_port, thread_port);
+ *pinf = inf;
+
+ if (inf == NULL)
+ {
+ /* Deallocate task_port, unless it was saved. */
+ kret = mach_port_deallocate (mach_task_self (), task_port);
+ MACH_CHECK_ERROR (kret);
+ }
+ }
+ else
+ {
+ /* We got new rights to the task, get rid of it. Do not get rid of
+ thread right, as we will need it to find the thread. */
+ kret = mach_port_deallocate (mach_task_self (), task_port);
+ MACH_CHECK_ERROR (kret);
+ }
+
if (inf == NULL)
{
/* Not a known inferior. This could happen if the child fork, as
kern_return_t kret;
mig_reply_error_t reply;
+ inferior_debug
+ (4, _("darwin_decode_exception_message: unknown task 0x%x\n"),
+ task_port);
+
/* Free thread port (we don't know it). */
kret = mach_port_deallocate (mach_task_self (), thread_port);
MACH_CHECK_ERROR (kret);
return 0;
}
+/* Decode dead_name notify message. */
+
+static int
+darwin_decode_notify_message (mach_msg_header_t *hdr, struct inferior **pinf)
+{
+ NDR_record_t *ndr = (NDR_record_t *)(hdr + 1);
+ integer_t *data = (integer_t *)(ndr + 1);
+ struct inferior *inf;
+ darwin_thread_t *thread;
+ task_t task_port;
+ thread_t thread_port;
+ kern_return_t kret;
+ int i;
+
+ /* Check message header. */
+ if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)
+ return -1;
+
+ /* Check descriptors. */
+ if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*ndr) + sizeof (integer_t)))
+ return -2;
+
+ /* Check data representation. */
+ if (darwin_check_message_ndr (ndr) != 0)
+ return -3;
+
+ task_port = data[0];
+
+ /* Find process by port. */
+ inf = darwin_find_inferior_by_task (task_port);
+ *pinf = inf;
+
+ /* Check message destination. */
+ if (inf != NULL && hdr->msgh_local_port != inf->priv->notify_port)
+ return -4;
+
+ return 0;
+}
+
static void
darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr,
integer_t code)
else if (hdr->msgh_id == 0x48)
{
/* MACH_NOTIFY_DEAD_NAME: notification for exit. */
+ int res;
+
+ res = darwin_decode_notify_message (hdr, &inf);
+
+ if (res < 0)
+ {
+ /* Should not happen... */
+ printf_unfiltered
+ (_("darwin_wait: ill-formatted message (id=0x%x, res=%d)\n"),
+ hdr->msgh_id, res);
+ }
+
*pinf = NULL;
*pthread = NULL;
- inf = darwin_find_inferior_by_notify (hdr->msgh_local_port);
+ if (res < 0 || inf == NULL)
+ {
+ status->kind = TARGET_WAITKIND_IGNORE;
+ return minus_one_ptid;
+ }
+
if (inf != NULL)
{
if (!inf->priv->no_ptrace)
else
{
status->kind = TARGET_WAITKIND_SIGNALLED;
- status->value.sig = WTERMSIG (wstatus);
+ status->value.sig = gdb_signal_from_host (WTERMSIG (wstatus));
}
inferior_debug (4, _("darwin_wait: pid=%d exit, status=0x%x\n"),
/* Looks necessary on Leopard and harmless... */
wait4 (inf->pid, &wstatus, 0, NULL);
- return ptid_build (inf->pid, 0, 0);
+ inferior_ptid = ptid_build (inf->pid, 0, 0);
+ return inferior_ptid;
}
else
{
kill (inf->pid, SIGINT);
}
+/* Deallocate threads port and vector. */
+
static void
-darwin_mourn_inferior (struct target_ops *ops)
+darwin_deallocate_threads (struct inferior *inf)
{
- struct inferior *inf = current_inferior ();
- kern_return_t kret;
- mach_port_t prev;
- int i;
-
- /* Deallocate threads. */
if (inf->priv->threads)
{
+ kern_return_t kret;
int k;
darwin_thread_t *t;
for (k = 0;
VEC_free (darwin_thread_t, inf->priv->threads);
inf->priv->threads = NULL;
}
+}
+
+static void
+darwin_mourn_inferior (struct target_ops *ops)
+{
+ struct inferior *inf = current_inferior ();
+ kern_return_t kret;
+ mach_port_t prev;
+ int i;
+
+ /* Deallocate threads. */
+ darwin_deallocate_threads (inf);
+ /* Remove notify_port from darwin_port_set. */
kret = mach_port_move_member (gdb_task,
inf->priv->notify_port, MACH_PORT_NULL);
MACH_CHECK_ERROR (kret);
+ /* Remove task port dead_name notification. */
kret = mach_port_request_notification (gdb_task, inf->priv->task,
MACH_NOTIFY_DEAD_NAME, 0,
MACH_PORT_NULL,
MACH_CHECK_ERROR (kret);
}
+ /* Destroy notify_port. */
kret = mach_port_destroy (gdb_task, inf->priv->notify_port);
MACH_CHECK_ERROR (kret);
-
/* Deallocate saved exception ports. */
- for (i = 0; i < inf->priv->exception_info.count; i++)
- {
- kret = mach_port_deallocate
- (gdb_task, inf->priv->exception_info.ports[i]);
- MACH_CHECK_ERROR (kret);
- }
- inf->priv->exception_info.count = 0;
+ darwin_deallocate_exception_ports (inf->priv);
+ /* Deallocate task port. */
kret = mach_port_deallocate (gdb_task, inf->priv->task);
MACH_CHECK_ERROR (kret);
return KERN_SUCCESS;
}
+/* Deallocate saved exception ports. */
+
+static void
+darwin_deallocate_exception_ports (darwin_inferior *inf)
+{
+ int i;
+ kern_return_t kret;
+
+ for (i = 0; i < inf->exception_info.count; i++)
+ {
+ kret = mach_port_deallocate (gdb_task, inf->exception_info.ports[i]);
+ MACH_CHECK_ERROR (kret);
+ }
+ inf->exception_info.count = 0;
+}
+
+static void
+darwin_setup_exceptions (struct inferior *inf)
+{
+ kern_return_t kret;
+ 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)
{
warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"),
inf->pid, safe_strerror (errno));
- target_mourn_inferior ();
+ 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
"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."));
- }
-
- kret = darwin_save_exception_ports (inf->priv);
- if (kret != KERN_SUCCESS)
- error (_("Unable to save exception ports, task_get_exception_ports"
- "returned: %d"),
- kret);
+ darwin_setup_request_notification (inf);
- /* 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);
}
+/* Get the thread_info object corresponding to this private_thread_info. */
+
+static struct thread_info *
+thread_info_from_private_thread_info (private_thread_info *pti)
+{
+ struct thread_info *it;
+
+ ALL_THREADS (it)
+ {
+ if (it->priv->gdb_port == pti->gdb_port)
+ break;
+ }
+
+ gdb_assert (it != NULL);
+
+ return it;
+}
+
static void
darwin_init_thread_list (struct inferior *inf)
{
- darwin_thread_t *thread;
- ptid_t new_ptid;
-
darwin_check_new_threads (inf);
- gdb_assert (inf->priv->threads
- && VEC_length (darwin_thread_t, inf->priv->threads) > 0);
- thread = VEC_index (darwin_thread_t, inf->priv->threads, 0);
+ gdb_assert (inf->priv->threads != NULL);
+ gdb_assert (VEC_length (darwin_thread_t, inf->priv->threads) > 0);
- /* Note: fork_inferior automatically add a thead but it uses a wrong ptid.
- Fix up. */
- new_ptid = ptid_build (inf->pid, 0, thread->gdb_port);
- thread_change_ptid (inferior_ptid, new_ptid);
- inferior_ptid = new_ptid;
+ private_thread_info *first_pti
+ = VEC_index (darwin_thread_t, inf->priv->threads, 0);
+ struct thread_info *first_thread
+ = thread_info_from_private_thread_info (first_pti);
+
+ inferior_ptid = first_thread->ptid;
}
/* The child must synchronize with gdb: gdb must set the exception port
char c;
/* Close write end point. */
- close (ptrace_fds[1]);
+ if (close (ptrace_fds[1]) < 0)
+ trace_start_error_with_name ("close");
/* Wait until gdb is ready. */
res = read (ptrace_fds[0], &c, 1);
if (res != 0)
- error (_("unable to read from pipe, read returned: %d"), res);
- close (ptrace_fds[0]);
+ trace_start_error (_("unable to read from pipe, read returned: %d"), res);
+
+ if (close (ptrace_fds[0]) < 0)
+ trace_start_error_with_name ("close");
/* Get rid of privileges. */
- setegid (getgid ());
+ if (setegid (getgid ()) < 0)
+ trace_start_error_with_name ("setegid");
/* Set TRACEME. */
- PTRACE (PT_TRACE_ME, 0, 0, 0);
+ if (PTRACE (PT_TRACE_ME, 0, 0, 0) < 0)
+ trace_start_error_with_name ("PTRACE");
/* Redirect signals to exception port. */
- PTRACE (PT_SIGEXC, 0, 0, 0);
+ if (PTRACE (PT_SIGEXC, 0, 0, 0) < 0)
+ trace_start_error_with_name ("PTRACE");
}
/* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */
darwin_init_thread_list (inf);
- startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
+ gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED);
}
static void
}
static void
-darwin_create_inferior (struct target_ops *ops, char *exec_file,
- char *allargs, char **env, int from_tty)
+darwin_create_inferior (struct target_ops *ops,
+ const char *exec_file,
+ const std::string &allargs,
+ char **env, int from_tty)
{
/* Do the hard work. */
- fork_inferior (exec_file, allargs, env, darwin_ptrace_me, darwin_ptrace_him,
- darwin_pre_ptrace, NULL, darwin_execvp);
-
- /* Return now in case of error. */
- if (ptid_equal (inferior_ptid, null_ptid))
- return;
+ fork_inferior (exec_file, allargs, env, darwin_ptrace_me,
+ darwin_ptrace_him, darwin_pre_ptrace, NULL,
+ darwin_execvp);
}
\f
inferior_appeared (inf, pid);
inf->attach_flag = 1;
- /* Always add a main thread. */
- add_thread_silent (inferior_ptid);
-
darwin_attach_pid (inf);
darwin_suspend_inferior (inf);
int res;
/* Display message. */
- if (from_tty)
- {
- char *exec_file = get_exec_file (0);
- if (exec_file == 0)
- exec_file = "";
- printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
- target_pid_to_str (pid_to_ptid (pid)));
- gdb_flush (gdb_stdout);
- }
+ target_announce_detach (from_tty);
/* If ptrace() is in use, stop the process. */
if (!inf->priv->no_ptrace)
{
}
-static char *
+static const char *
darwin_pid_to_str (struct target_ops *ops, ptid_t ptid)
{
static char buf[80];
return 1;
}
-/* -Wmissing-prototypes */
-extern initialize_file_ftype _initialize_darwin_inferior;
-
void
_initialize_darwin_inferior (void)
{
projects / deliverable / binutils-gdb.git / blobdiff