/* Darwin support for GDB, the GNU debugger.
- Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2008-2014 Free Software Foundation, Inc.
Contributed by AdaCore.
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "top.h"
#include "regcache.h"
#include "event-top.h"
#include "inf-loop.h"
-#include "gdb_stat.h"
-#include "exceptions.h"
+#include <sys/stat.h>
#include "inf-child.h"
#include "value.h"
#include "arch-utils.h"
#include "bfd.h"
+#include "bfd/mach-o.h"
#include <sys/ptrace.h>
#include <sys/signal.h>
#include <sys/types.h>
#include <unistd.h>
#include <signal.h>
-#include <string.h>
#include <ctype.h>
-#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/proc.h>
+#include <libproc.h>
+#include <sys/syscall.h>
+#include <spawn.h>
#include <mach/mach_error.h>
#include <mach/mach_vm.h>
#include <mach/port.h>
#include "darwin-nat.h"
+#include "common/filestuff.h"
/* Quick overview.
Darwin kernel is Mach + BSD derived kernel. Note that they share the
#define PTRACE(CMD, PID, ADDR, SIG) \
darwin_ptrace(#CMD, CMD, (PID), (ADDR), (SIG))
-extern boolean_t exc_server (mach_msg_header_t *in, mach_msg_header_t *out);
+static void darwin_stop (struct target_ops *self, ptid_t);
-static void darwin_stop (ptid_t);
+static void darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step,
+ enum gdb_signal signal);
+static void darwin_resume (ptid_t ptid, int step,
+ enum gdb_signal signal);
-static void darwin_mourn_inferior (struct target_ops *ops);
+static ptid_t darwin_wait_to (struct target_ops *ops, ptid_t ptid,
+ struct target_waitstatus *status, int options);
+static ptid_t darwin_wait (ptid_t ptid, struct target_waitstatus *status);
-static int darwin_lookup_task (char *args, task_t * ptask, int *ppid);
+static void darwin_mourn_inferior (struct target_ops *ops);
static void darwin_kill_inferior (struct target_ops *ops);
static void darwin_files_info (struct target_ops *ops);
-/* Current inferior. */
-darwin_inferior *darwin_inf = NULL;
+static 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);
/* Target operations for Darwin. */
static struct target_ops *darwin_ops;
/* Exception port. */
mach_port_t darwin_ex_port;
-/* Notification port. */
-mach_port_t darwin_not_port;
-
-/* Port set. */
+/* Port set, to wait for answer on all ports. */
mach_port_t darwin_port_set;
-/* Page size. */
+/* Page size. */
static vm_size_t mach_page_size;
/* If Set, catch all mach exceptions (before they are converted to signals
by the kernel). */
static int enable_mach_exceptions;
+/* Inferior that should report a fake stop event. */
+static struct inferior *darwin_inf_fake_stop;
+
#define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1))
#define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1)
-/* Buffer containing received message and to be sent message. */
-static union
-{
- mach_msg_header_t hdr;
- char data[1024];
-} msgin, msgout;
-
-/* Current message state.
- If the kernel has sent a message it expects a reply and the inferior
- can't be killed before. */
-static enum msg_state { NO_MESSAGE, GOT_MESSAGE, REPLY_SENT } msg_state;
-
-/* Unmarshalled received message. */
-static struct exc_msg
-{
- /* Receive port. */
- mach_port_t port;
-
- /* Thread and task taking the exception. */
- mach_port_t thread_port;
- mach_port_t task_port;
-
- /* Type of the exception. */
- exception_type_t ex_type;
-
- /* Machine dependent details. */
- mach_msg_type_number_t data_count;
- integer_t ex_data[4];
-} exc_msg;
-
-
-/* This controls output of inferior debugging.
- 1 = basic exception handling
- 2 = task management
- 3 = thread management
- 4 = pending_event_handler
- 6 = most chatty level. */
-
-static int darwin_debug_flag = 0;
+/* This controls output of inferior debugging. */
+static unsigned int darwin_debug_flag = 0;
+
+/* Create a __TEXT __info_plist section in the executable so that gdb could
+ be signed. This is required to get an authorization for task_for_pid.
+
+ Once gdb is built, you must codesign it with any system-trusted signing
+ authority. See taskgated(8) for details. */
+static const unsigned char info_plist[]
+__attribute__ ((section ("__TEXT,__info_plist"),used)) =
+ "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
+ "<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\""
+ " \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n"
+ "<plist version=\"1.0\">\n"
+ "<dict>\n"
+ " <key>CFBundleIdentifier</key>\n"
+ " <string>org.gnu.gdb</string>\n"
+ " <key>CFBundleName</key>\n"
+ " <string>gdb</string>\n"
+ " <key>CFBundleVersion</key>\n"
+ " <string>1.0</string>\n"
+ " <key>SecTaskAccess</key>\n"
+ " <array>\n"
+ " <string>allowed</string>\n"
+ " <string>debug</string>\n"
+ " </array>\n"
+ "</dict>\n"
+ "</plist>\n";
static void
inferior_debug (int level, const char *fmt, ...)
return;
if (func == NULL)
func = _("[UNKNOWN]");
-
- error (_("error on line %u of \"%s\" in function \"%s\": %s (0x%lx)\n"),
- line, file, func, mach_error_string (ret), (unsigned long) ret);
+
+ warning (_("Mach error at \"%s:%u\" in function \"%s\": %s (0x%lx)"),
+ file, line, func, mach_error_string (ret), (unsigned long) ret);
}
static const char *
}
}
+/* Set errno to zero, and then call ptrace with the given arguments.
+ If inferior debugging traces are on, then also print a debug
+ trace.
+
+ The returned value is the same as the value returned by ptrace,
+ except in the case where that value is -1 but errno is zero.
+ This case is documented to be a non-error situation, so we
+ return zero in that case. */
+
static int
darwin_ptrace (const char *name,
int request, int pid, PTRACE_TYPE_ARG3 arg3, int arg4)
{
int ret;
+ errno = 0;
ret = ptrace (request, pid, (caddr_t) arg3, arg4);
+ if (ret == -1 && errno == 0)
+ ret = 0;
- inferior_debug (2, _("ptrace (%s, %d, 0x%x, %d): %d (%s)\n"),
+ inferior_debug (4, _("ptrace (%s, %d, 0x%x, %d): %d (%s)\n"),
name, pid, arg3, arg4, ret,
- (ret != 0) ? strerror (errno) : _("no error"));
+ (ret != 0) ? safe_strerror (errno) : _("no error"));
return ret;
}
static int
cmp_thread_t (const void *l, const void *r)
{
- thread_t lt = *(const thread_t *)l;
- thread_t lr = *(const thread_t *)r;
- return (int)(lr - lt);
+ thread_t tl = *(const thread_t *)l;
+ thread_t tr = *(const thread_t *)r;
+ return (int)(tl - tr);
}
static void
-darwin_check_new_threads (darwin_inferior *inf)
+darwin_check_new_threads (struct inferior *inf)
{
kern_return_t kret;
unsigned int i;
unsigned int new_nbr;
unsigned int old_nbr;
unsigned int new_ix, old_ix;
- VEC (thread_t) *thread_vec;
+ darwin_inferior *darwin_inf = inf->private;
+ VEC (darwin_thread_t) *thread_vec;
/* Get list of threads. */
- kret = task_threads (inf->task, &thread_list, &new_nbr);
+ kret = task_threads (darwin_inf->task, &thread_list, &new_nbr);
MACH_CHECK_ERROR (kret);
if (kret != KERN_SUCCESS)
return;
+ /* Sort the list. */
if (new_nbr > 1)
qsort (thread_list, new_nbr, sizeof (thread_t), cmp_thread_t);
- thread_vec = VEC_alloc (thread_t, new_nbr);
-
- if (inf->threads)
- old_nbr = VEC_length (thread_t, inf->threads);
+ if (darwin_inf->threads)
+ old_nbr = VEC_length (darwin_thread_t, darwin_inf->threads);
else
old_nbr = 0;
+ /* Quick check for no changes. */
+ if (old_nbr == new_nbr)
+ {
+ for (i = 0; i < new_nbr; i++)
+ if (thread_list[i]
+ != VEC_index (darwin_thread_t, darwin_inf->threads, i)->gdb_port)
+ break;
+ if (i == new_nbr)
+ {
+ /* Deallocate ports. */
+ for (i = 0; i < new_nbr; i++)
+ {
+ kret = mach_port_deallocate (mach_task_self (), thread_list[i]);
+ MACH_CHECK_ERROR (kret);
+ }
+
+ /* Deallocate the buffer. */
+ kret = vm_deallocate (gdb_task, (vm_address_t) thread_list,
+ new_nbr * sizeof (int));
+ MACH_CHECK_ERROR (kret);
+
+ return;
+ }
+ }
+
+ thread_vec = VEC_alloc (darwin_thread_t, new_nbr);
+
for (new_ix = 0, old_ix = 0; new_ix < new_nbr || old_ix < old_nbr;)
{
thread_t new_id = (new_ix < new_nbr) ?
thread_list[new_ix] : THREAD_NULL;
- thread_t old_id = (old_ix < old_nbr) ?
- VEC_index (thread_t, inf->threads, old_ix) : THREAD_NULL;
+ darwin_thread_t *old = (old_ix < old_nbr) ?
+ VEC_index (darwin_thread_t, darwin_inf->threads, old_ix) : NULL;
+ thread_t old_id = old ? old->gdb_port : THREAD_NULL;
+
+ inferior_debug
+ (12, _(" new_ix:%d/%d, old_ix:%d/%d, new_id:0x%x old_id:0x%x\n"),
+ new_ix, new_nbr, old_ix, old_nbr, new_id, old_id);
if (old_id == new_id)
{
/* Thread still exist. */
- VEC_safe_push (thread_t, thread_vec, old_id);
+ VEC_safe_push (darwin_thread_t, thread_vec, old);
new_ix++;
old_ix++;
- kret = mach_port_deallocate (gdb_task, old_id);
+ /* Deallocate the port. */
+ kret = mach_port_deallocate (gdb_task, new_id);
MACH_CHECK_ERROR (kret);
+
continue;
}
- if (new_id < old_id || old_ix == old_nbr)
+ if (new_ix < new_nbr && new_id == MACH_PORT_DEAD)
+ {
+ /* Ignore dead ports.
+ In some weird cases, we might get dead ports. They should
+ correspond to dead thread so they could safely be ignored. */
+ new_ix++;
+ continue;
+ }
+ 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;
- tp = add_thread (ptid_build (inf->pid, 0, new_id));
- VEC_safe_push (thread_t, thread_vec, new_id);
+ /* 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->private = pti;
+ }
+ VEC_safe_push (darwin_thread_t, thread_vec, pti);
new_ix++;
continue;
}
- if (new_id > old_id || new_ix == new_nbr)
+ if (old_ix < old_nbr && (new_ix == new_nbr || new_id > old_id))
{
/* A thread was removed. */
delete_thread (ptid_build (inf->pid, 0, old_id));
kret = mach_port_deallocate (gdb_task, old_id);
MACH_CHECK_ERROR (kret);
old_ix++;
+ continue;
}
+ gdb_assert_not_reached ("unexpected thread case");
}
- if (inf->threads)
- VEC_free (thread_t, inf->threads);
- inf->threads = thread_vec;
+ if (darwin_inf->threads)
+ VEC_free (darwin_thread_t, darwin_inf->threads);
+ darwin_inf->threads = thread_vec;
+ /* Deallocate the buffer. */
kret = vm_deallocate (gdb_task, (vm_address_t) thread_list,
new_nbr * sizeof (int));
MACH_CHECK_ERROR (kret);
}
+static int
+find_inferior_task_it (struct inferior *inf, void *port_ptr)
+{
+ return inf->private->task == *(task_t*)port_ptr;
+}
+
+static int
+find_inferior_notify_it (struct inferior *inf, void *port_ptr)
+{
+ return inf->private->notify_port == *(task_t*)port_ptr;
+}
+
+/* Return an inferior by task port. */
+static struct inferior *
+darwin_find_inferior_by_task (task_t port)
+{
+ return iterate_over_inferiors (&find_inferior_task_it, &port);
+}
+
+/* Return an inferior by notification port. */
+static struct inferior *
+darwin_find_inferior_by_notify (mach_port_t port)
+{
+ return iterate_over_inferiors (&find_inferior_notify_it, &port);
+}
+
+/* Return a thread by port. */
+static darwin_thread_t *
+darwin_find_thread (struct inferior *inf, thread_t thread)
+{
+ darwin_thread_t *t;
+ int k;
+
+ for (k = 0;
+ VEC_iterate (darwin_thread_t, inf->private->threads, k, t);
+ k++)
+ if (t->gdb_port == thread)
+ return t;
+ return NULL;
+}
+
+/* Suspend (ie stop) an inferior at Mach level. */
+
static void
-darwin_stop (ptid_t t)
+darwin_suspend_inferior (struct inferior *inf)
{
- int ret;
+ if (!inf->private->suspended)
+ {
+ kern_return_t kret;
+
+ kret = task_suspend (inf->private->task);
+ MACH_CHECK_ERROR (kret);
- ret = kill (ptid_get_pid (inferior_ptid), SIGINT);
+ inf->private->suspended = 1;
+ }
}
+/* Resume an inferior at Mach level. */
+
static void
-darwin_resume (struct target_ops *ops,
- ptid_t ptid, int step, enum target_signal signal)
+darwin_resume_inferior (struct inferior *inf)
{
- struct target_waitstatus status;
- int pid;
- thread_t thread;
- kern_return_t kret;
- int res;
+ if (inf->private->suspended)
+ {
+ kern_return_t kret;
- /* minus_one_ptid is RESUME_ALL. */
- if (ptid_equal (ptid, minus_one_ptid))
- ptid = inferior_ptid;
+ kret = task_resume (inf->private->task);
+ MACH_CHECK_ERROR (kret);
+
+ inf->private->suspended = 0;
+ }
+}
- pid = ptid_get_pid (ptid);
- thread = ptid_get_tid (ptid);
+/* Iterator functions. */
- inferior_debug
- (2, _("darwin_resume: state=%d, thread=0x%x, step=%d signal=%d\n"),
- msg_state, thread, step, signal);
+static int
+darwin_suspend_inferior_it (struct inferior *inf, void *arg)
+{
+ darwin_suspend_inferior (inf);
+ darwin_check_new_threads (inf);
+ return 0;
+}
+
+static int
+darwin_resume_inferior_it (struct inferior *inf, void *arg)
+{
+ darwin_resume_inferior (inf);
+ return 0;
+}
- switch (msg_state)
+static void
+darwin_dump_message (mach_msg_header_t *hdr, int disp_body)
+{
+ printf_unfiltered (_("message header:\n"));
+ printf_unfiltered (_(" bits: 0x%x\n"), hdr->msgh_bits);
+ printf_unfiltered (_(" size: 0x%x\n"), hdr->msgh_size);
+ printf_unfiltered (_(" remote-port: 0x%x\n"), hdr->msgh_remote_port);
+ printf_unfiltered (_(" local-port: 0x%x\n"), hdr->msgh_local_port);
+ printf_unfiltered (_(" reserved: 0x%x\n"), hdr->msgh_reserved);
+ printf_unfiltered (_(" id: 0x%x\n"), hdr->msgh_id);
+
+ if (disp_body)
{
- case GOT_MESSAGE:
- switch (exc_msg.ex_type)
- {
- case EXC_SOFTWARE:
- if (exc_msg.ex_data[0] == EXC_SOFT_SIGNAL)
- {
- int nsignal = target_signal_to_host (signal);
- res = PTRACE (PT_THUPDATE, pid,
- (void *)(uintptr_t)exc_msg.thread_port, nsignal);
- if (res < 0)
- printf_unfiltered (_("ptrace THUP: res=%d\n"), res);
- }
- break;
+ const unsigned char *data;
+ const unsigned int *ldata;
+ int size;
+ int i;
- default:
- break;
- }
-
- if (thread != 0)
+ data = (unsigned char *)(hdr + 1);
+ size = hdr->msgh_size - sizeof (mach_msg_header_t);
+
+ if (hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX)
{
- inferior_debug (2, _("darwin_set_sstep (thread=%x, enable=%d)\n"),
- thread, step);
- darwin_set_sstep (thread, step);
+ mach_msg_body_t *bod = (mach_msg_body_t*)data;
+ mach_msg_port_descriptor_t *desc =
+ (mach_msg_port_descriptor_t *)(bod + 1);
+ int k;
+ NDR_record_t *ndr;
+ printf_unfiltered (_("body: descriptor_count=%u\n"),
+ bod->msgh_descriptor_count);
+ data += sizeof (mach_msg_body_t);
+ size -= sizeof (mach_msg_body_t);
+ for (k = 0; k < bod->msgh_descriptor_count; k++)
+ switch (desc[k].type)
+ {
+ case MACH_MSG_PORT_DESCRIPTOR:
+ printf_unfiltered
+ (_(" descr %d: type=%u (port) name=0x%x, dispo=%d\n"),
+ k, desc[k].type, desc[k].name, desc[k].disposition);
+ break;
+ default:
+ printf_unfiltered (_(" descr %d: type=%u\n"),
+ k, desc[k].type);
+ break;
+ }
+ data += bod->msgh_descriptor_count
+ * sizeof (mach_msg_port_descriptor_t);
+ size -= bod->msgh_descriptor_count
+ * sizeof (mach_msg_port_descriptor_t);
+ ndr = (NDR_record_t *)(desc + bod->msgh_descriptor_count);
+ printf_unfiltered
+ (_("NDR: mig=%02x if=%02x encod=%02x "
+ "int=%02x char=%02x float=%02x\n"),
+ ndr->mig_vers, ndr->if_vers, ndr->mig_encoding,
+ ndr->int_rep, ndr->char_rep, ndr->float_rep);
+ data += sizeof (NDR_record_t);
+ size -= sizeof (NDR_record_t);
}
- kret = mach_msg (&msgout.hdr, MACH_SEND_MSG | MACH_SEND_INTERRUPT,
- msgout.hdr.msgh_size, 0,
+ printf_unfiltered (_(" data:"));
+ ldata = (const unsigned int *)data;
+ for (i = 0; i < size / sizeof (unsigned int); i++)
+ printf_unfiltered (" %08x", ldata[i]);
+ printf_unfiltered (_("\n"));
+ }
+}
+
+static int
+darwin_decode_exception_message (mach_msg_header_t *hdr,
+ struct inferior **pinf,
+ darwin_thread_t **pthread)
+{
+ mach_msg_body_t *bod = (mach_msg_body_t*)(hdr + 1);
+ mach_msg_port_descriptor_t *desc = (mach_msg_port_descriptor_t *)(bod + 1);
+ NDR_record_t *ndr;
+ integer_t *data;
+ struct inferior *inf;
+ darwin_thread_t *thread;
+ task_t task_port;
+ thread_t thread_port;
+ kern_return_t kret;
+ int i;
+
+ /* Check message destination. */
+ if (hdr->msgh_local_port != darwin_ex_port)
+ return -1;
+
+ /* Check message header. */
+ if (!(hdr->msgh_bits & MACH_MSGH_BITS_COMPLEX))
+ return -1;
+
+ /* Check descriptors. */
+ if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc)
+ + sizeof (*ndr) + 2 * sizeof (integer_t))
+ || bod->msgh_descriptor_count != 2
+ || desc[0].type != MACH_MSG_PORT_DESCRIPTOR
+ || desc[0].disposition != MACH_MSG_TYPE_MOVE_SEND
+ || desc[1].type != MACH_MSG_PORT_DESCRIPTOR
+ || desc[1].disposition != MACH_MSG_TYPE_MOVE_SEND)
+ return -1;
+
+ /* 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)
+ return -1;
+
+ /* Ok, the hard work. */
+ data = (integer_t *)(ndr + 1);
+
+ 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)
+ {
+ /* Not a known inferior. This could happen if the child fork, as
+ the created process will inherit its exception port.
+ FIXME: should the exception port be restored ? */
+ kern_return_t kret;
+ mig_reply_error_t reply;
+
+ /* Free thread port (we don't know it). */
+ kret = mach_port_deallocate (mach_task_self (), thread_port);
+ MACH_CHECK_ERROR (kret);
+
+ darwin_encode_reply (&reply, hdr, KERN_SUCCESS);
+
+ kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT,
+ reply.Head.msgh_size, 0,
MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE,
MACH_PORT_NULL);
- if (kret != 0)
- printf_unfiltered (_("mach_msg (reply) ret=%d\n"), kret);
+ MACH_CHECK_ERROR (kret);
- msg_state = REPLY_SENT;
- break;
+ return 0;
+ }
- case NO_MESSAGE:
- if (step)
- res = PTRACE (PT_STEP, pid, (caddr_t)1, 0);
- else
- res = PTRACE (PT_CONTINUE, pid, (caddr_t)1, 0);
- break;
+ /* Find thread by port. */
+ /* Check for new threads. Do it early so that the port in the exception
+ message can be deallocated. */
+ darwin_check_new_threads (inf);
- default:
- gdb_assert (0);
- }
+ /* Free the thread port (as gdb knows the thread, it has already has a right
+ for it, so this just decrement a reference counter). */
+ kret = mach_port_deallocate (mach_task_self (), thread_port);
+ MACH_CHECK_ERROR (kret);
+
+ thread = darwin_find_thread (inf, thread_port);
+ if (thread == NULL)
+ return -1;
+ *pthread = thread;
+
+ /* The thread should be running. However we have observed cases where a
+ thread got a SIGTTIN message after being stopped. */
+ gdb_assert (thread->msg_state != DARWIN_MESSAGE);
+
+ /* Finish decoding. */
+ thread->event.header = *hdr;
+ thread->event.thread_port = thread_port;
+ thread->event.task_port = task_port;
+ thread->event.ex_type = data[0];
+ thread->event.data_count = data[1];
+
+ if (hdr->msgh_size < (sizeof (*hdr) + sizeof (*bod) + 2 * sizeof (*desc)
+ + sizeof (*ndr) + 2 * sizeof (integer_t)
+ + data[1] * sizeof (integer_t)))
+ return -1;
+ for (i = 0; i < data[1]; i++)
+ thread->event.ex_data[i] = data[2 + i];
+
+ thread->msg_state = DARWIN_MESSAGE;
+
+ return 0;
}
-kern_return_t
-catch_exception_raise_state
- (mach_port_t port,
- exception_type_t exception_type, mach_exception_data_t exception_data,
- mach_msg_type_number_t data_count, thread_state_flavor_t * state_flavor,
- thread_state_t in_state, mach_msg_type_number_t in_state_count,
- thread_state_t out_state, mach_msg_type_number_t out_state_count)
+static void
+darwin_encode_reply (mig_reply_error_t *reply, mach_msg_header_t *hdr,
+ integer_t code)
{
- return KERN_FAILURE;
+ mach_msg_header_t *rh = &reply->Head;
+
+ rh->msgh_bits = MACH_MSGH_BITS (MACH_MSGH_BITS_REMOTE (hdr->msgh_bits), 0);
+ rh->msgh_remote_port = hdr->msgh_remote_port;
+ rh->msgh_size = (mach_msg_size_t) sizeof (mig_reply_error_t);
+ rh->msgh_local_port = MACH_PORT_NULL;
+ rh->msgh_id = hdr->msgh_id + 100;
+
+ reply->NDR = NDR_record;
+ reply->RetCode = code;
}
-kern_return_t
-catch_exception_raise_state_identity
- (mach_port_t port, mach_port_t thread_port, mach_port_t task_port,
- exception_type_t exception_type, mach_exception_data_t exception_data,
- mach_msg_type_number_t data_count, thread_state_flavor_t * state_flavor,
- thread_state_t in_state, mach_msg_type_number_t in_state_count,
- thread_state_t out_state, mach_msg_type_number_t out_state_count)
+static void
+darwin_send_reply (struct inferior *inf, darwin_thread_t *thread)
{
kern_return_t kret;
+ mig_reply_error_t reply;
- kret = mach_port_deallocate (mach_task_self (), task_port);
- MACH_CHECK_ERROR (kret);
- kret = mach_port_deallocate (mach_task_self (), thread_port);
+ darwin_encode_reply (&reply, &thread->event.header, KERN_SUCCESS);
+
+ kret = mach_msg (&reply.Head, MACH_SEND_MSG | MACH_SEND_INTERRUPT,
+ reply.Head.msgh_size, 0,
+ MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE,
+ MACH_PORT_NULL);
MACH_CHECK_ERROR (kret);
- return KERN_FAILURE;
+ inf->private->pending_messages--;
}
-kern_return_t
-catch_exception_raise (mach_port_t port,
- mach_port_t thread_port,
- mach_port_t task_port,
- exception_type_t exception_type,
- exception_data_t exception_data,
- mach_msg_type_number_t data_count)
+static void
+darwin_resume_thread (struct inferior *inf, darwin_thread_t *thread,
+ int step, int nsignal)
{
kern_return_t kret;
- int i;
int res;
- /* We got new rights to the task. Get rid of it. */
- kret = mach_port_deallocate (mach_task_self (), task_port);
- MACH_CHECK_ERROR (kret);
-
inferior_debug
- (7, _("catch_exception_raise: exception_type=%d, data_count=%d\n"),
- exception_type, data_count);
- if (darwin_debug_flag > 7)
+ (3, _("darwin_resume_thread: state=%d, thread=0x%x, step=%d nsignal=%d\n"),
+ thread->msg_state, thread->gdb_port, step, nsignal);
+
+ switch (thread->msg_state)
{
- for (i = 0; i < data_count; i++)
- printf_unfiltered (" %08x", exception_data[i]);
- printf_unfiltered ("\n");
+ case DARWIN_MESSAGE:
+ if (thread->event.ex_type == EXC_SOFTWARE
+ && thread->event.ex_data[0] == EXC_SOFT_SIGNAL)
+ {
+ /* Either deliver a new signal or cancel the signal received. */
+ res = PTRACE (PT_THUPDATE, inf->pid,
+ (void *)(uintptr_t)thread->gdb_port, nsignal);
+ if (res < 0)
+ inferior_debug (1, _("ptrace THUP: res=%d\n"), res);
+ }
+ else if (nsignal)
+ {
+ /* Note: ptrace is allowed only if the process is stopped.
+ Directly send the signal to the thread. */
+ res = syscall (SYS___pthread_kill, thread->gdb_port, nsignal);
+ inferior_debug (4, _("darwin_resume_thread: kill 0x%x %d: %d\n"),
+ thread->gdb_port, nsignal, res);
+ thread->signaled = 1;
+ }
+
+ /* Set or reset single step. */
+ if (step != thread->single_step)
+ {
+ inferior_debug (4, _("darwin_set_sstep (thread=0x%x, enable=%d)\n"),
+ thread->gdb_port, step);
+ darwin_set_sstep (thread->gdb_port, step);
+ thread->single_step = step;
+ }
+
+ darwin_send_reply (inf, thread);
+ thread->msg_state = DARWIN_RUNNING;
+ break;
+
+ case DARWIN_RUNNING:
+ break;
+
+ case DARWIN_STOPPED:
+ kret = thread_resume (thread->gdb_port);
+ MACH_CHECK_ERROR (kret);
+
+ thread->msg_state = DARWIN_RUNNING;
+ break;
}
+}
- /* Save the message.
- FIXME: this should be in a per-thread variable. */
- exc_msg.port = port;
- exc_msg.thread_port = thread_port;
- exc_msg.task_port = task_port;
- exc_msg.ex_type = exception_type;
- exc_msg.data_count = data_count;
- for (i = 0; i < data_count && i < 4; i++)
- exc_msg.ex_data[i] = exception_data[i];
+/* Resume all threads of the inferior. */
- return KERN_SUCCESS;
+static void
+darwin_resume_inferior_threads (struct inferior *inf, int step, int nsignal)
+{
+ darwin_thread_t *thread;
+ int k;
+
+ for (k = 0;
+ VEC_iterate (darwin_thread_t, inf->private->threads, k, thread);
+ k++)
+ darwin_resume_thread (inf, thread, step, nsignal);
}
-static ptid_t
-darwin_wait (struct target_ops *ops,
- ptid_t ptid, struct target_waitstatus *status)
+struct resume_inferior_threads_param
{
+ int step;
+ int nsignal;
+};
+
+static int
+darwin_resume_inferior_threads_it (struct inferior *inf, void *param)
+{
+ int step = ((struct resume_inferior_threads_param *)param)->step;
+ int nsignal = ((struct resume_inferior_threads_param *)param)->nsignal;
+
+ darwin_resume_inferior_threads (inf, step, nsignal);
+
+ return 0;
+}
+
+/* Suspend all threads of INF. */
+
+static void
+darwin_suspend_inferior_threads (struct inferior *inf)
+{
+ darwin_thread_t *thread;
kern_return_t kret;
- mach_msg_header_t *hdr = &msgin.hdr;
- pid_t pid = ptid_get_pid (inferior_ptid); /* FIXME. */
+ int k;
+
+ for (k = 0;
+ VEC_iterate (darwin_thread_t, inf->private->threads, k, thread);
+ k++)
+ switch (thread->msg_state)
+ {
+ case DARWIN_STOPPED:
+ case DARWIN_MESSAGE:
+ break;
+ case DARWIN_RUNNING:
+ kret = thread_suspend (thread->gdb_port);
+ MACH_CHECK_ERROR (kret);
+ thread->msg_state = DARWIN_STOPPED;
+ break;
+ }
+}
+
+static void
+darwin_resume (ptid_t ptid, int step, enum gdb_signal signal)
+{
+ struct target_waitstatus status;
+ int pid;
- gdb_assert (msg_state != GOT_MESSAGE);
+ kern_return_t kret;
+ int res;
+ int nsignal;
+ struct inferior *inf;
+
+ inferior_debug
+ (2, _("darwin_resume: pid=%d, tid=0x%x, step=%d, signal=%d\n"),
+ ptid_get_pid (ptid), ptid_get_tid (ptid), step, signal);
- inferior_debug (6, _("darwin_wait: waiting for a message\n"));
+ if (signal == GDB_SIGNAL_0)
+ nsignal = 0;
+ else
+ nsignal = gdb_signal_to_host (signal);
- /* Wait for a message. */
- kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0,
- sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL);
+ /* Don't try to single step all threads. */
+ if (step)
+ ptid = inferior_ptid;
- if (kret == MACH_RCV_INTERRUPTED)
+ /* minus_one_ptid is RESUME_ALL. */
+ if (ptid_equal (ptid, minus_one_ptid))
{
- status->kind = TARGET_WAITKIND_IGNORE;
- return minus_one_ptid;
- }
+ struct resume_inferior_threads_param param;
+
+ param.nsignal = nsignal;
+ param.step = step;
- if (kret != MACH_MSG_SUCCESS)
+ /* Resume threads. */
+ iterate_over_inferiors (darwin_resume_inferior_threads_it, ¶m);
+ /* Resume tasks. */
+ iterate_over_inferiors (darwin_resume_inferior_it, NULL);
+ }
+ else
{
- inferior_debug (1, _("mach_msg: ret=%x\n"), kret);
- status->kind = TARGET_WAITKIND_SPURIOUS;
- return minus_one_ptid;
+ struct inferior *inf = find_inferior_pid (ptid_get_pid (ptid));
+ long tid = ptid_get_tid (ptid);
+
+ /* Stop the inferior (should be useless). */
+ darwin_suspend_inferior (inf);
+
+ if (tid == 0)
+ darwin_resume_inferior_threads (inf, step, nsignal);
+ else
+ {
+ darwin_thread_t *thread;
+
+ /* Suspend threads of the task. */
+ darwin_suspend_inferior_threads (inf);
+
+ /* Resume the selected thread. */
+ thread = darwin_find_thread (inf, tid);
+ gdb_assert (thread);
+ darwin_resume_thread (inf, thread, step, nsignal);
+ }
+
+ /* Resume the task. */
+ darwin_resume_inferior (inf);
}
+}
- /* Debug: display message. */
- if (darwin_debug_flag > 10)
- {
- const unsigned long *buf = (unsigned long *) hdr;
- unsigned int i;
-
- printf_unfiltered (_(" bits: 0x%x"), hdr->msgh_bits);
- printf_unfiltered (_(", size: 0x%x"), hdr->msgh_size);
- printf_unfiltered (_(", remote-port: 0x%x"), hdr->msgh_remote_port);
- printf_unfiltered (_(", local-port: 0x%x"), hdr->msgh_local_port);
- printf_unfiltered (_(", reserved: 0x%x"), hdr->msgh_reserved);
- printf_unfiltered (_(", id: 0x%x\n"), hdr->msgh_id);
-
- if (darwin_debug_flag > 11)
- {
- printf_unfiltered (_(" data:"));
- for (i = 0; i < hdr->msgh_size; i++)
- printf_unfiltered (" %08lx", buf[i]);
- printf_unfiltered (_("\n"));
- }
- }
+static void
+darwin_resume_to (struct target_ops *ops, ptid_t ptid, int step,
+ enum gdb_signal signal)
+{
+ return darwin_resume (ptid, step, signal);
+}
+
+static ptid_t
+darwin_decode_message (mach_msg_header_t *hdr,
+ darwin_thread_t **pthread,
+ struct inferior **pinf,
+ struct target_waitstatus *status)
+{
+ darwin_thread_t *thread;
+ struct inferior *inf;
- /* Exception message. */
- if (hdr->msgh_local_port == darwin_ex_port)
+ /* Exception message. 2401 == 0x961 is exc. */
+ if (hdr->msgh_id == 2401)
{
- /* Handle it via the exception server. */
- if (!exc_server (&msgin.hdr, &msgout.hdr))
+ int res;
+
+ /* Decode message. */
+ res = darwin_decode_exception_message (hdr, &inf, &thread);
+
+ if (res < 0)
{
- printf_unfiltered (_("exc_server: unknown message (id=%x)\n"),
- hdr->msgh_id);
- status->kind = TARGET_WAITKIND_SPURIOUS;
+ /* Should not happen... */
+ printf_unfiltered
+ (_("darwin_wait: ill-formatted message (id=0x%x)\n"), hdr->msgh_id);
+ /* FIXME: send a failure reply? */
+ status->kind = TARGET_WAITKIND_IGNORE;
return minus_one_ptid;
}
+ if (inf == NULL)
+ {
+ status->kind = TARGET_WAITKIND_IGNORE;
+ return minus_one_ptid;
+ }
+ *pinf = inf;
+ *pthread = thread;
+ inf->private->pending_messages++;
status->kind = TARGET_WAITKIND_STOPPED;
+ thread->msg_state = DARWIN_MESSAGE;
+
+ inferior_debug (4, _("darwin_wait: thread=0x%x, got %s\n"),
+ thread->gdb_port,
+ unparse_exception_type (thread->event.ex_type));
- inferior_debug (2, _("darwin_wait: thread=%x, got %s\n"),
- exc_msg.thread_port,
- unparse_exception_type (exc_msg.ex_type));
-
- switch (exc_msg.ex_type)
+ switch (thread->event.ex_type)
{
case EXC_BAD_ACCESS:
- status->value.sig = TARGET_EXC_BAD_ACCESS;
+ status->value.sig = GDB_EXC_BAD_ACCESS;
break;
case EXC_BAD_INSTRUCTION:
- status->value.sig = TARGET_EXC_BAD_INSTRUCTION;
+ status->value.sig = GDB_EXC_BAD_INSTRUCTION;
break;
case EXC_ARITHMETIC:
- status->value.sig = TARGET_EXC_ARITHMETIC;
+ status->value.sig = GDB_EXC_ARITHMETIC;
break;
case EXC_EMULATION:
- status->value.sig = TARGET_EXC_EMULATION;
+ status->value.sig = GDB_EXC_EMULATION;
break;
case EXC_SOFTWARE:
- if (exc_msg.ex_data[0] == EXC_SOFT_SIGNAL)
+ if (thread->event.ex_data[0] == EXC_SOFT_SIGNAL)
{
- status->value.sig = target_signal_from_host (exc_msg.ex_data[1]);
- inferior_debug (2, _(" (signal %d: %s)\n"),
- exc_msg.ex_data[1],
- target_signal_to_name (status->value.sig));
+ status->value.sig =
+ gdb_signal_from_host (thread->event.ex_data[1]);
+ inferior_debug (5, _(" (signal %d: %s)\n"),
+ thread->event.ex_data[1],
+ gdb_signal_to_name (status->value.sig));
+
+ /* If the thread is stopped because it has received a signal
+ that gdb has just sent, continue. */
+ if (thread->signaled)
+ {
+ thread->signaled = 0;
+ darwin_send_reply (inf, thread);
+ thread->msg_state = DARWIN_RUNNING;
+ status->kind = TARGET_WAITKIND_IGNORE;
+ }
}
else
- status->value.sig = TARGET_EXC_SOFTWARE;
+ status->value.sig = GDB_EXC_SOFTWARE;
break;
case EXC_BREAKPOINT:
/* Many internal GDB routines expect breakpoints to be reported
- as TARGET_SIGNAL_TRAP, and will report TARGET_EXC_BREAKPOINT
- as a spurious signal. */
- status->value.sig = TARGET_SIGNAL_TRAP;
+ as GDB_SIGNAL_TRAP, and will report GDB_EXC_BREAKPOINT
+ as a spurious signal. */
+ status->value.sig = GDB_SIGNAL_TRAP;
break;
default:
- status->value.sig = TARGET_SIGNAL_UNKNOWN;
+ status->value.sig = GDB_SIGNAL_UNKNOWN;
break;
}
- msg_state = GOT_MESSAGE;
-
- return ptid_build (pid, 0, exc_msg.thread_port);
+ return ptid_build (inf->pid, 0, thread->gdb_port);
}
- else if (hdr->msgh_local_port == darwin_not_port)
+ else if (hdr->msgh_id == 0x48)
{
- pid_t res;
- int wstatus;
+ /* MACH_NOTIFY_DEAD_NAME: notification for exit. */
+ *pinf = NULL;
+ *pthread = NULL;
- /* FIXME: translate task port to pid. */
- res = wait4 (pid, &wstatus, 0, NULL);
- if (res != pid)
+ inf = darwin_find_inferior_by_notify (hdr->msgh_local_port);
+ if (inf != NULL)
{
- printf_unfiltered (_("wait4: res=%x\n"), res);
- wstatus = 0;
+ if (!inf->private->no_ptrace)
+ {
+ pid_t res;
+ int wstatus;
+
+ res = wait4 (inf->pid, &wstatus, 0, NULL);
+ if (res < 0 || res != inf->pid)
+ {
+ printf_unfiltered (_("wait4: res=%d: %s\n"),
+ res, safe_strerror (errno));
+ status->kind = TARGET_WAITKIND_IGNORE;
+ return minus_one_ptid;
+ }
+ if (WIFEXITED (wstatus))
+ {
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = WEXITSTATUS (wstatus);
+ }
+ else
+ {
+ status->kind = TARGET_WAITKIND_SIGNALLED;
+ status->value.sig = WTERMSIG (wstatus);
+ }
+
+ inferior_debug (4, _("darwin_wait: pid=%d exit, status=0x%x\n"),
+ res, wstatus);
+
+ /* Looks necessary on Leopard and harmless... */
+ wait4 (inf->pid, &wstatus, 0, NULL);
+
+ return ptid_build (inf->pid, 0, 0);
+ }
+ else
+ {
+ inferior_debug (4, _("darwin_wait: pid=%d\n"), inf->pid);
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = 0; /* Don't know. */
+ return ptid_build (inf->pid, 0, 0);
+ }
}
- status->kind = TARGET_WAITKIND_EXITED;
- status->value.integer = WEXITSTATUS (wstatus);
+ }
- inferior_debug (2, _("darwin_wait: pid=%d exit, status=%x\n"),
- pid, wstatus);
+ /* Unknown message. */
+ warning (_("darwin: got unknown message, id: 0x%x"), hdr->msgh_id);
+ status->kind = TARGET_WAITKIND_IGNORE;
+ return minus_one_ptid;
+}
- msg_state = NO_MESSAGE;
+static int
+cancel_breakpoint (ptid_t ptid)
+{
+ /* Arrange for a breakpoint to be hit again later. We will handle
+ the current event, eventually we will resume this thread, and this
+ breakpoint will trap again.
- return ptid;
- }
- else
+ If we do not do this, then we run the risk that the user will
+ delete or disable the breakpoint, but the thread will have already
+ tripped on it. */
+
+ struct regcache *regcache = get_thread_regcache (ptid);
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ CORE_ADDR pc;
+
+ pc = regcache_read_pc (regcache) - target_decr_pc_after_break (gdbarch);
+ if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), pc))
{
- printf_unfiltered (_("Bad local-port: %x\n"), hdr->msgh_local_port);
- status->kind = TARGET_WAITKIND_SPURIOUS;
- return minus_one_ptid;
+ inferior_debug (4, "cancel_breakpoint for thread 0x%x\n",
+ ptid_get_tid (ptid));
+
+ /* Back up the PC if necessary. */
+ if (target_decr_pc_after_break (gdbarch))
+ regcache_write_pc (regcache, pc);
+
+ return 1;
}
+ return 0;
}
-static void
-darwin_mourn_inferior (struct target_ops *ops)
+static ptid_t
+darwin_wait (ptid_t ptid, struct target_waitstatus *status)
{
- struct inferior *inf = current_inferior ();
kern_return_t kret;
- mach_port_t prev;
- int i;
+ union
+ {
+ mach_msg_header_t hdr;
+ char data[0x100];
+ } msgin;
+ mach_msg_header_t *hdr = &msgin.hdr;
+ ptid_t res;
+ darwin_thread_t *thread;
+ struct inferior *inf;
- unpush_target (darwin_ops);
+ inferior_debug
+ (2, _("darwin_wait: waiting for a message pid=%d thread=%lx\n"),
+ ptid_get_pid (ptid), ptid_get_tid (ptid));
- /* Deallocate threads. */
- if (darwin_inf->threads)
+ /* Handle fake stop events at first. */
+ if (darwin_inf_fake_stop != NULL)
{
- int k;
- thread_t t;
- for (k = 0; VEC_iterate (thread_t, darwin_inf->threads, k, t); k++)
- {
- kret = mach_port_deallocate (gdb_task, t);
- MACH_CHECK_ERROR (kret);
- }
- VEC_free (thread_t, darwin_inf->threads);
- darwin_inf->threads = NULL;
- }
+ inf = darwin_inf_fake_stop;
+ darwin_inf_fake_stop = NULL;
- kret = mach_port_request_notification (gdb_task, darwin_inf->task,
- MACH_NOTIFY_DEAD_NAME, 0,
- darwin_inf->prev_not_port,
- MACH_MSG_TYPE_MAKE_SEND_ONCE,
- &prev);
- /* This can fail if the task is dead. */
- if (kret == KERN_SUCCESS)
- {
- kret = mach_port_deallocate (gdb_task, prev);
- MACH_CHECK_ERROR (kret);
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = GDB_SIGNAL_TRAP;
+ thread = VEC_index (darwin_thread_t, inf->private->threads, 0);
+ thread->msg_state = DARWIN_STOPPED;
+ return ptid_build (inf->pid, 0, thread->gdb_port);
}
- /* Deallocate saved exception ports. */
- for (i = 0; i < darwin_inf->exception_info.count; i++)
+ do
{
- kret = mach_port_deallocate
- (gdb_task, darwin_inf->exception_info.ports[i]);
- MACH_CHECK_ERROR (kret);
+ /* set_sigint_trap (); */
+
+ /* Wait for a message. */
+ kret = mach_msg (&msgin.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0,
+ sizeof (msgin.data), darwin_port_set, 0, MACH_PORT_NULL);
+
+ /* clear_sigint_trap (); */
+
+ if (kret == MACH_RCV_INTERRUPTED)
+ {
+ status->kind = TARGET_WAITKIND_IGNORE;
+ return minus_one_ptid;
+ }
+
+ if (kret != MACH_MSG_SUCCESS)
+ {
+ inferior_debug (5, _("mach_msg: ret=0x%x\n"), kret);
+ status->kind = TARGET_WAITKIND_SPURIOUS;
+ return minus_one_ptid;
+ }
+
+ /* Debug: display message. */
+ if (darwin_debug_flag > 10)
+ darwin_dump_message (hdr, darwin_debug_flag > 11);
+
+ res = darwin_decode_message (hdr, &thread, &inf, status);
+ if (ptid_equal (res, minus_one_ptid))
+ continue;
+
+ /* Early return in case an inferior has exited. */
+ if (inf == NULL)
+ return res;
}
- darwin_inf->exception_info.count = 0;
+ while (status->kind == TARGET_WAITKIND_IGNORE);
- kret = mach_port_deallocate (gdb_task, darwin_inf->task);
- MACH_CHECK_ERROR (kret);
+ /* Stop all tasks. */
+ iterate_over_inferiors (darwin_suspend_inferior_it, NULL);
- darwin_inf->task = 0;
- darwin_inf->pid = 0;
+ /* Read pending messages. */
+ while (1)
+ {
+ struct target_waitstatus status2;
+ ptid_t ptid2;
- generic_mourn_inferior ();
-}
+ kret = mach_msg (&msgin.hdr,
+ MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0,
+ sizeof (msgin.data), darwin_port_set, 1, MACH_PORT_NULL);
-static void
-darwin_stop_inferior (struct target_ops *ops, darwin_inferior *inf)
-{
- struct target_waitstatus wstatus;
- ptid_t ptid;
- kern_return_t kret;
- int status;
- int res;
+ if (kret == MACH_RCV_TIMED_OUT)
+ break;
+ if (kret != MACH_MSG_SUCCESS)
+ {
+ inferior_debug
+ (5, _("darwin_wait: mach_msg(pending) ret=0x%x\n"), kret);
+ break;
+ }
- gdb_assert (inf != NULL);
+ /* Debug: display message. */
+ if (darwin_debug_flag > 10)
+ darwin_dump_message (hdr, darwin_debug_flag > 11);
- kret = task_suspend (inf->task);
- MACH_CHECK_ERROR (kret);
+ ptid2 = darwin_decode_message (hdr, &thread, &inf, &status2);
- if (msg_state == GOT_MESSAGE)
- darwin_resume (darwin_ops, inferior_ptid, 0, 0);
+ if (inf != NULL && thread != NULL
+ && thread->event.ex_type == EXC_BREAKPOINT)
+ {
+ if (thread->single_step
+ || cancel_breakpoint (ptid_build (inf->pid, 0, thread->gdb_port)))
+ {
+ gdb_assert (thread->msg_state == DARWIN_MESSAGE);
+ darwin_send_reply (inf, thread);
+ thread->msg_state = DARWIN_RUNNING;
+ }
+ else
+ inferior_debug
+ (3, _("darwin_wait: thread 0x%x hit a non-gdb breakpoint\n"),
+ thread->gdb_port);
+ }
+ else
+ inferior_debug (3, _("darwin_wait: unhandled pending message\n"));
+ }
+ return res;
+}
- res = kill (inf->pid, SIGSTOP);
- if (res != 0)
- warning (_("cannot kill: %s\n"), strerror (errno));
+static ptid_t
+darwin_wait_to (struct target_ops *ops,
+ ptid_t ptid, struct target_waitstatus *status, int options)
+{
+ return darwin_wait (ptid, status);
+}
- ptid = darwin_wait (ops, inferior_ptid, &wstatus);
- gdb_assert (wstatus.kind = TARGET_WAITKIND_STOPPED);
+static void
+darwin_stop (struct target_ops *self, ptid_t t)
+{
+ struct inferior *inf = current_inferior ();
+
+ /* FIXME: handle in no_ptrace mode. */
+ gdb_assert (!inf->private->no_ptrace);
+ kill (inf->pid, SIGINT);
}
static void
-darwin_kill_inferior (struct target_ops *ops)
+darwin_mourn_inferior (struct target_ops *ops)
{
- struct target_waitstatus wstatus;
- ptid_t ptid;
+ struct inferior *inf = current_inferior ();
kern_return_t kret;
- int status;
- int res;
+ mach_port_t prev;
+ int i;
+
+ /* Deallocate threads. */
+ if (inf->private->threads)
+ {
+ int k;
+ darwin_thread_t *t;
+ for (k = 0;
+ VEC_iterate (darwin_thread_t, inf->private->threads, k, t);
+ k++)
+ {
+ kret = mach_port_deallocate (gdb_task, t->gdb_port);
+ MACH_CHECK_ERROR (kret);
+ }
+ VEC_free (darwin_thread_t, inf->private->threads);
+ inf->private->threads = NULL;
+ }
+
+ kret = mach_port_move_member (gdb_task,
+ inf->private->notify_port, MACH_PORT_NULL);
+ MACH_CHECK_ERROR (kret);
- gdb_assert (darwin_inf != NULL);
+ kret = mach_port_request_notification (gdb_task, inf->private->task,
+ MACH_NOTIFY_DEAD_NAME, 0,
+ MACH_PORT_NULL,
+ MACH_MSG_TYPE_MAKE_SEND_ONCE,
+ &prev);
+ /* This can fail if the task is dead. */
+ inferior_debug (4, "task=0x%x, prev=0x%x, notify_port=0x%x\n",
+ inf->private->task, prev, inf->private->notify_port);
- if (ptid_equal (inferior_ptid, null_ptid))
- return;
+ if (kret == KERN_SUCCESS)
+ {
+ kret = mach_port_deallocate (gdb_task, prev);
+ MACH_CHECK_ERROR (kret);
+ }
- darwin_stop_inferior (ops, darwin_inf);
+ kret = mach_port_destroy (gdb_task, inf->private->notify_port);
+ MACH_CHECK_ERROR (kret);
- res = PTRACE (PT_KILL, darwin_inf->pid, 0, 0);
- gdb_assert (res == 0);
- if (msg_state == GOT_MESSAGE)
+ /* Deallocate saved exception ports. */
+ for (i = 0; i < inf->private->exception_info.count; i++)
{
- exc_msg.ex_type = 0;
- darwin_resume (ops, inferior_ptid, 0, 0);
+ kret = mach_port_deallocate
+ (gdb_task, inf->private->exception_info.ports[i]);
+ MACH_CHECK_ERROR (kret);
}
+ inf->private->exception_info.count = 0;
- kret = task_resume (darwin_inf->task);
+ kret = mach_port_deallocate (gdb_task, inf->private->task);
MACH_CHECK_ERROR (kret);
- ptid = darwin_wait (ops, inferior_ptid, &wstatus);
+ xfree (inf->private);
+ inf->private = NULL;
- /* This double wait seems required... */
- res = waitpid (darwin_inf->pid, &status, 0);
- gdb_assert (res == darwin_inf->pid);
+ inf_child_mourn_inferior (ops);
+}
- msg_state = NO_MESSAGE;
+static void
+darwin_reply_to_all_pending_messages (struct inferior *inf)
+{
+ int k;
+ darwin_thread_t *t;
- target_mourn_inferior ();
+ for (k = 0;
+ VEC_iterate (darwin_thread_t, inf->private->threads, k, t);
+ k++)
+ {
+ if (t->msg_state == DARWIN_MESSAGE)
+ darwin_resume_thread (inf, t, 0, 0);
+ }
}
-/* The child must synchronize with gdb: gdb must set the exception port
- before the child call PTRACE_SIGEXC. We use a pipe to achieve this.
- FIXME: is there a lighter way ? */
-static int ptrace_fds[2];
-
static void
-darwin_ptrace_me (void)
+darwin_stop_inferior (struct inferior *inf)
{
+ struct target_waitstatus wstatus;
+ ptid_t ptid;
+ kern_return_t kret;
+ int status;
int res;
- char c;
- /* Close write end point. */
- close (ptrace_fds[1]);
+ gdb_assert (inf != NULL);
- /* Wait until gdb is ready. */
- res = read (ptrace_fds[0], &c, 1);
- gdb_assert (res == 0);
- close (ptrace_fds[0]);
+ darwin_suspend_inferior (inf);
- /* Get rid of privileges. */
- setegid (getgid ());
+ darwin_reply_to_all_pending_messages (inf);
- /* Set TRACEME. */
- PTRACE (PT_TRACE_ME, 0, 0, 0);
+ if (inf->private->no_ptrace)
+ return;
- /* Redirect signals to exception port. */
- PTRACE (PT_SIGEXC, 0, 0, 0);
-}
+ res = kill (inf->pid, SIGSTOP);
+ if (res != 0)
+ warning (_("cannot kill: %s"), safe_strerror (errno));
-/* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */
-static void
-darwin_pre_ptrace (void)
-{
- if (pipe (ptrace_fds) != 0)
+ /* Wait until the process is really stopped. */
+ while (1)
{
- ptrace_fds[0] = -1;
- ptrace_fds[1] = -1;
- error (_("unable to create a pipe: %s"), safe_strerror (errno));
+ ptid = darwin_wait (inferior_ptid, &wstatus);
+ if (wstatus.kind == TARGET_WAITKIND_STOPPED
+ && wstatus.value.sig == GDB_SIGNAL_STOP)
+ break;
}
}
}
static void
-darwin_attach_pid (int pid)
+darwin_kill_inferior (struct target_ops *ops)
+{
+ struct inferior *inf = current_inferior ();
+ struct target_waitstatus wstatus;
+ ptid_t ptid;
+ kern_return_t kret;
+ int status;
+ int res;
+
+ if (ptid_equal (inferior_ptid, null_ptid))
+ return;
+
+ gdb_assert (inf != NULL);
+
+ kret = darwin_restore_exception_ports (inf->private);
+ MACH_CHECK_ERROR (kret);
+
+ darwin_reply_to_all_pending_messages (inf);
+
+ res = kill (inf->pid, 9);
+
+ if (res == 0)
+ {
+ darwin_resume_inferior (inf);
+
+ ptid = darwin_wait (inferior_ptid, &wstatus);
+ }
+ else if (errno != ESRCH)
+ warning (_("Failed to kill inferior: kill (%d, 9) returned [%s]"),
+ inf->pid, safe_strerror (errno));
+
+ target_mourn_inferior ();
+}
+
+static void
+darwin_attach_pid (struct inferior *inf)
{
- task_t itask;
kern_return_t kret;
mach_port_t prev_port;
int traps_expected;
+ mach_port_t prev_not;
exception_mask_t mask;
- kret = task_for_pid (gdb_task, pid, &itask);
+ inf->private = XCNEW (darwin_inferior);
+
+ kret = task_for_pid (gdb_task, inf->pid, &inf->private->task);
if (kret != KERN_SUCCESS)
{
int status;
- struct inferior *inf = current_inferior ();
if (!inf->attach_flag)
{
- kill (pid, 9);
- waitpid (pid, &status, 0);
+ kill (inf->pid, 9);
+ waitpid (inf->pid, &status, 0);
}
error (_("Unable to find Mach task port for process-id %d: %s (0x%lx).\n"
- " (please check gdb is setgid procmod)"),
- pid, mach_error_string (kret), (unsigned long) kret);
+ " (please check gdb is codesigned - see taskgated(8))"),
+ inf->pid, mach_error_string (kret), (unsigned long) kret);
}
- inferior_debug (2, _("inferior task: 0x%08x, pid: %d\n"), itask, pid);
+ inferior_debug (2, _("inferior task: 0x%x, pid: %d\n"),
+ inf->private->task, inf->pid);
if (darwin_ex_port == MACH_PORT_NULL)
{
/* Create a port to get exceptions. */
kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE,
&darwin_ex_port);
- gdb_assert (kret == KERN_SUCCESS);
+ if (kret != KERN_SUCCESS)
+ error (_("Unable to create exception port, mach_port_allocate "
+ "returned: %d"),
+ kret);
kret = mach_port_insert_right (gdb_task, darwin_ex_port, darwin_ex_port,
MACH_MSG_TYPE_MAKE_SEND);
- gdb_assert (kret == KERN_SUCCESS);
+ if (kret != KERN_SUCCESS)
+ error (_("Unable to create exception port, mach_port_insert_right "
+ "returned: %d"),
+ kret);
/* Create a port set and put ex_port in it. */
kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_PORT_SET,
&darwin_port_set);
- gdb_assert (kret == KERN_SUCCESS);
+ if (kret != KERN_SUCCESS)
+ error (_("Unable to create port set, mach_port_allocate "
+ "returned: %d"),
+ kret);
kret = mach_port_move_member (gdb_task, darwin_ex_port, darwin_port_set);
- gdb_assert (kret == KERN_SUCCESS);
-
- /* Create a port to be notified when the child task terminates. */
- kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE,
- &darwin_not_port);
- gdb_assert (kret == KERN_SUCCESS);
+ if (kret != KERN_SUCCESS)
+ error (_("Unable to move exception port into new port set, "
+ "mach_port_move_member\n"
+ "returned: %d"),
+ kret);
+ }
- kret = mach_port_insert_right (gdb_task, darwin_not_port, darwin_not_port,
- MACH_MSG_TYPE_MAKE_SEND);
- gdb_assert (kret == KERN_SUCCESS);
+ /* Create a port to be notified when the child task terminates. */
+ kret = mach_port_allocate (gdb_task, MACH_PORT_RIGHT_RECEIVE,
+ &inf->private->notify_port);
+ if (kret != KERN_SUCCESS)
+ error (_("Unable to create notification port, mach_port_allocate "
+ "returned: %d"),
+ kret);
- kret = mach_port_move_member (gdb_task, darwin_not_port, darwin_port_set);
- gdb_assert (kret == KERN_SUCCESS);
- }
+ kret = mach_port_move_member (gdb_task,
+ inf->private->notify_port, darwin_port_set);
+ if (kret != KERN_SUCCESS)
+ error (_("Unable to move notification port into new port set, "
+ "mach_port_move_member\n"
+ "returned: %d"),
+ kret);
- kret = mach_port_request_notification (gdb_task, itask,
+ kret = mach_port_request_notification (gdb_task, inf->private->task,
MACH_NOTIFY_DEAD_NAME, 0,
- darwin_not_port,
+ inf->private->notify_port,
MACH_MSG_TYPE_MAKE_SEND_ONCE,
- &darwin_inf->prev_not_port);
- gdb_assert (kret == KERN_SUCCESS);
-
- darwin_inf->task = itask;
- darwin_inf->pid = pid;
+ &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 (darwin_inf);
- gdb_assert (kret == KERN_SUCCESS);
+ kret = darwin_save_exception_ports (inf->private);
+ 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;
- kret = task_set_exception_ports
- (itask, mask, darwin_ex_port, EXCEPTION_DEFAULT, THREAD_STATE_NONE);
- gdb_assert (kret == KERN_SUCCESS);
+ mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT;
+ kret = task_set_exception_ports (inf->private->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);
- push_target (darwin_ops);
+ if (!target_is_pushed (darwin_ops))
+ push_target (darwin_ops);
}
static void
-darwin_init_thread_list (darwin_inferior *inf)
+darwin_init_thread_list (struct inferior *inf)
{
- thread_t thread;
+ darwin_thread_t *thread;
+ ptid_t new_ptid;
darwin_check_new_threads (inf);
- gdb_assert (inf->threads && VEC_length (thread_t, inf->threads) > 0);
- thread = VEC_index (thread_t, inf->threads, 0);
- inferior_ptid = ptid_build (inf->pid, 0, thread);
+ gdb_assert (inf->private->threads
+ && VEC_length (darwin_thread_t, inf->private->threads) > 0);
+ thread = VEC_index (darwin_thread_t, inf->private->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;
+}
+
+/* The child must synchronize with gdb: gdb must set the exception port
+ before the child call PTRACE_SIGEXC. We use a pipe to achieve this.
+ FIXME: is there a lighter way ? */
+static int ptrace_fds[2];
+
+static void
+darwin_ptrace_me (void)
+{
+ int res;
+ char c;
+
+ /* Close write end point. */
+ close (ptrace_fds[1]);
+
+ /* 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]);
+
+ /* Get rid of privileges. */
+ setegid (getgid ());
+
+ /* Set TRACEME. */
+ PTRACE (PT_TRACE_ME, 0, 0, 0);
+
+ /* Redirect signals to exception port. */
+ PTRACE (PT_SIGEXC, 0, 0, 0);
+}
+
+/* Dummy function to be sure fork_inferior uses fork(2) and not vfork(2). */
+static void
+darwin_pre_ptrace (void)
+{
+ if (pipe (ptrace_fds) != 0)
+ {
+ ptrace_fds[0] = -1;
+ ptrace_fds[1] = -1;
+ error (_("unable to create a pipe: %s"), safe_strerror (errno));
+ }
+
+ mark_fd_no_cloexec (ptrace_fds[0]);
+ mark_fd_no_cloexec (ptrace_fds[1]);
}
static void
kern_return_t kret;
mach_port_t prev_port;
int traps_expected;
+ struct inferior *inf = current_inferior ();
- darwin_attach_pid (pid);
+ darwin_attach_pid (inf);
/* Let's the child run. */
close (ptrace_fds[0]);
close (ptrace_fds[1]);
- /* fork_inferior automatically add a thread - but it uses a wrong tid. */
- delete_thread_silent (inferior_ptid);
- darwin_init_thread_list (darwin_inf);
-
+ unmark_fd_no_cloexec (ptrace_fds[0]);
+ unmark_fd_no_cloexec (ptrace_fds[1]);
+
+ darwin_init_thread_list (inf);
+
startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
}
static void
+darwin_execvp (const char *file, char * const argv[], char * const env[])
+{
+ posix_spawnattr_t attr;
+ short ps_flags = 0;
+ int res;
+
+ res = posix_spawnattr_init (&attr);
+ if (res != 0)
+ {
+ fprintf_unfiltered
+ (gdb_stderr, "Cannot initialize attribute for posix_spawn\n");
+ return;
+ }
+
+ /* Do like execve: replace the image. */
+ ps_flags = POSIX_SPAWN_SETEXEC;
+
+ /* Disable ASLR. The constant doesn't look to be available outside the
+ kernel include files. */
+#ifndef _POSIX_SPAWN_DISABLE_ASLR
+#define _POSIX_SPAWN_DISABLE_ASLR 0x0100
+#endif
+ ps_flags |= _POSIX_SPAWN_DISABLE_ASLR;
+ res = posix_spawnattr_setflags (&attr, ps_flags);
+ if (res != 0)
+ {
+ fprintf_unfiltered (gdb_stderr, "Cannot set posix_spawn flags\n");
+ return;
+ }
+
+ posix_spawnp (NULL, argv[0], NULL, &attr, argv, env);
+}
+
+static void
darwin_create_inferior (struct target_ops *ops, char *exec_file,
char *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_pre_ptrace, NULL, darwin_execvp);
+
/* Return now in case of error. */
if (ptid_equal (inferior_ptid, null_ptid))
return;
}
\f
+/* Set things up such that the next call to darwin_wait will immediately
+ return a fake stop event for inferior INF.
+
+ This assumes that the inferior's thread list has been initialized,
+ as it will suspend the inferior's first thread. */
+
+static void
+darwin_setup_fake_stop_event (struct inferior *inf)
+{
+ darwin_thread_t *thread;
+ kern_return_t kret;
+
+ gdb_assert (darwin_inf_fake_stop == NULL);
+ darwin_inf_fake_stop = inf;
+
+ /* When detecting a fake pending stop event, darwin_wait returns
+ an event saying that the first thread is in a DARWIN_STOPPED
+ state. To make that accurate, we need to suspend that thread
+ as well. Otherwise, we'll try resuming it when resuming the
+ inferior, and get a warning because the thread's suspend count
+ is already zero, making the resume request useless. */
+ thread = VEC_index (darwin_thread_t, inf->private->threads, 0);
+ kret = thread_suspend (thread->gdb_port);
+ MACH_CHECK_ERROR (kret);
+}
+
/* Attach to process PID, then initialize for debugging it
and wait for the trace-trap that results from attaching. */
static void
-darwin_attach (struct target_ops *ops, char *args, int from_tty)
+darwin_attach (struct target_ops *ops, const char *args, int from_tty)
{
pid_t pid;
pid_t pid2;
int wstatus;
int res;
struct inferior *inf;
+ kern_return_t kret;
- gdb_assert (msg_state == NO_MESSAGE);
-
- if (!args)
- error_no_arg (_("process-id to attach"));
-
- pid = atoi (args);
+ pid = parse_pid_to_attach (args);
- if (pid == getpid ()) /* Trying to masturbate? */
+ if (pid == getpid ()) /* Trying to masturbate? */
error (_("I refuse to debug myself!"));
if (from_tty)
- printf_unfiltered (_("Attaching to pid %d\n"), pid);
+ {
+ char *exec_file = get_exec_file (0);
- res = PTRACE (PT_ATTACHEXC, pid, 0, 0);
- if (res != 0)
- error (_("Unable to attach to process-id %d: %s (%d)"),
- pid, strerror (errno), errno);
+ if (exec_file)
+ printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
+ target_pid_to_str (pid_to_ptid (pid)));
+ else
+ printf_unfiltered (_("Attaching to %s\n"),
+ target_pid_to_str (pid_to_ptid (pid)));
+
+ gdb_flush (gdb_stdout);
+ }
+
+ if (pid == 0 || kill (pid, 0) < 0)
+ error (_("Can't attach to process %d: %s (%d)"),
+ pid, safe_strerror (errno), errno);
- inf = add_inferior (pid);
+ inferior_ptid = pid_to_ptid (pid);
+ inf = current_inferior ();
+ inferior_appeared (inf, pid);
inf->attach_flag = 1;
- darwin_attach_pid (pid);
+ /* Always add a main thread. */
+ add_thread_silent (inferior_ptid);
- pid2 = wait4 (pid, &wstatus, WUNTRACED, NULL);
- gdb_assert (pid2 == pid);
- inferior_debug (1, _("darwin_attach: wait4 pid=%d, status=0x%x\n"),
- pid2, wstatus);
+ darwin_attach_pid (inf);
-
- darwin_init_thread_list (darwin_inf);
+ darwin_suspend_inferior (inf);
- darwin_check_osabi (darwin_inf, ptid_get_tid (inferior_ptid));
+ darwin_init_thread_list (inf);
- /* Looks strange, but the kernel doesn't stop the process...
- (Bug in Leopard ?)
- Do it manually. */
- /* FIXME: doesn't look to work with multi-threads!! */
- kill (pid, SIGSTOP);
+ darwin_check_osabi (inf->private, ptid_get_tid (inferior_ptid));
+
+ darwin_setup_fake_stop_event (inf);
+
+ inf->private->no_ptrace = 1;
}
/* Take a program previously attached to and detaches it.
previously attached. It *might* work if the program was
started via fork. */
static void
-darwin_detach (struct target_ops *ops, char *args, int from_tty)
+darwin_detach (struct target_ops *ops, const char *args, int from_tty)
{
+ pid_t pid = ptid_get_pid (inferior_ptid);
+ struct inferior *inf = current_inferior ();
kern_return_t kret;
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, %d\n"), exec_file,
- ptid_get_pid (inferior_ptid));
+ printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
+ target_pid_to_str (pid_to_ptid (pid)));
gdb_flush (gdb_stdout);
}
- darwin_stop_inferior (ops, darwin_inf);
+ /* If ptrace() is in use, stop the process. */
+ if (!inf->private->no_ptrace)
+ darwin_stop_inferior (inf);
- kret = darwin_restore_exception_ports (darwin_inf);
+ kret = darwin_restore_exception_ports (inf->private);
MACH_CHECK_ERROR (kret);
- if (msg_state == GOT_MESSAGE)
+ if (!inf->private->no_ptrace)
{
- exc_msg.ex_type = 0;
- darwin_resume (ops, inferior_ptid, 0, 0);
+ res = PTRACE (PT_DETACH, inf->pid, 0, 0);
+ if (res != 0)
+ printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"),
+ inf->pid, safe_strerror (errno), errno);
}
- kret = task_resume (darwin_inf->task);
- gdb_assert (kret == KERN_SUCCESS);
-
- res = PTRACE (PT_DETACH, darwin_inf->pid, 0, 0);
- if (res != 0)
- printf_unfiltered (_("Unable to detach from process-id %d: %s (%d)"),
- darwin_inf->pid, strerror (errno), errno);
+ darwin_reply_to_all_pending_messages (inf);
- msg_state = NO_MESSAGE;
+ /* When using ptrace, we have just performed a PT_DETACH, which
+ resumes the inferior. On the other hand, when we are not using
+ ptrace, we need to resume its execution ourselves. */
+ if (inf->private->no_ptrace)
+ darwin_resume_inferior (inf);
darwin_mourn_inferior (ops);
}
static void
darwin_files_info (struct target_ops *ops)
{
- gdb_assert (darwin_inf != NULL);
}
static char *
darwin_pid_to_str (struct target_ops *ops, ptid_t ptid)
{
- static char buf[128];
+ static char buf[80];
+ long tid = ptid_get_tid (ptid);
+
+ if (tid != 0)
+ {
+ snprintf (buf, sizeof (buf), _("Thread 0x%lx of process %u"),
+ tid, ptid_get_pid (ptid));
+ return buf;
+ }
- snprintf (buf, sizeof (buf),
- _("process %d gdb-thread 0x%lx"),
- (unsigned) ptid_get_pid (ptid),
- (unsigned long) ptid_get_tid (ptid));
- return buf;
+ return normal_pid_to_str (ptid);
}
static int
copy it to RDADDR in gdb's address space.
If WRADDR is not NULL, write gdb's LEN bytes from WRADDR and copy it
to ADDR in inferior task's address space.
- Return 0 on failure; number of bytes read / writen otherwise. */
+ Return 0 on failure; number of bytes read / writen otherwise. */
static int
darwin_read_write_inferior (task_t task, CORE_ADDR addr,
- char *rdaddr, const char *wraddr, int length)
+ gdb_byte *rdaddr, const gdb_byte *wraddr,
+ ULONGEST length)
{
- kern_return_t err;
+ kern_return_t kret;
mach_vm_address_t offset = addr & (mach_page_size - 1);
mach_vm_address_t low_address = (mach_vm_address_t) (addr - offset);
mach_vm_size_t aligned_length = (mach_vm_size_t) PAGE_ROUND (offset + length);
pointer_t copied;
- int copy_count;
+ mach_msg_type_number_t copy_count;
mach_vm_size_t remaining_length;
mach_vm_address_t region_address;
mach_vm_size_t region_length;
- inferior_debug (8, _("darwin_read_write_inferior(%s, len=%d)\n"),
- core_addr_to_string (addr), length);
-
- /* Get memory from inferior with page aligned addresses */
- err = mach_vm_read (task, low_address, aligned_length,
+ inferior_debug (8, _("darwin_read_write_inferior(task=0x%x, %s, len=%s)\n"),
+ task, core_addr_to_string (addr), pulongest (length));
+
+ /* Get memory from inferior with page aligned addresses. */
+ kret = mach_vm_read (task, low_address, aligned_length,
&copied, ©_count);
- if (err != KERN_SUCCESS)
+ if (kret != KERN_SUCCESS)
{
- warning (_("darwin_read_write_inferior: vm_read failed: %s"),
- mach_error_string (err));
+ inferior_debug
+ (1, _("darwin_read_write_inferior: mach_vm_read failed at %s: %s"),
+ core_addr_to_string (addr), mach_error_string (kret));
return 0;
}
region_address < low_address + aligned_length;
region_address += region_length, remaining_length -= region_length)
{
- vm_region_basic_info_data_64_t info;
- mach_port_t object_name;
- mach_vm_address_t old_address = region_address;
+ vm_region_submap_short_info_data_64_t info;
+ mach_vm_address_t region_start = region_address;
mach_msg_type_number_t count;
-
- region_length = remaining_length;
- count = VM_REGION_BASIC_INFO_COUNT_64;
- err = mach_vm_region (task, ®ion_address, ®ion_length,
- VM_REGION_BASIC_INFO_64,
- (vm_region_info_t) &info, &count, &object_name);
-
- if (err != KERN_SUCCESS)
+ natural_t region_depth;
+
+ region_depth = 100000;
+ count = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64;
+ kret = mach_vm_region_recurse
+ (task, ®ion_start, ®ion_length, ®ion_depth,
+ (vm_region_recurse_info_t) &info, &count);
+
+ if (kret != KERN_SUCCESS)
{
- warning (_("darwin_write_inferior: mach_vm_region failed: %s"),
- mach_error_string (err));
+ inferior_debug (1, _("darwin_read_write_inferior: "
+ "mach_vm_region_recurse failed at %s: %s\n"),
+ core_addr_to_string (region_address),
+ mach_error_string (kret));
goto out;
}
- /* Check for holes in memory */
- if (region_address > old_address)
+ inferior_debug
+ (9, _("darwin_read_write_inferior: "
+ "mach_vm_region_recurse addr=%s, start=%s, len=%s\n"),
+ core_addr_to_string (region_address),
+ core_addr_to_string (region_start),
+ core_addr_to_string (region_length));
+
+ /* Check for holes in memory. */
+ if (region_start > region_address)
{
- warning (_("No memory at %s (vs %s+0x%x). Nothing written"),
- core_addr_to_string (old_address),
+ warning (_("No memory at %s (vs %s+0x%x). Nothing written"),
core_addr_to_string (region_address),
+ core_addr_to_string (region_start),
(unsigned)region_length);
length = 0;
goto out;
}
+ /* Adjust the length. */
+ region_length -= (region_address - region_start);
+
if (!(info.max_protection & VM_PROT_WRITE))
{
- warning (_("Memory at address %s is unwritable. Nothing written"),
- core_addr_to_string (old_address));
- length = 0;
- goto out;
+ kret = mach_vm_protect
+ (task, region_address, region_length,
+ TRUE, info.max_protection | VM_PROT_WRITE | VM_PROT_COPY);
+ if (kret != KERN_SUCCESS)
+ {
+ warning (_("darwin_read_write_inf: "
+ "mach_vm_protect max failed at %s: %s"),
+ core_addr_to_string (region_address),
+ mach_error_string (kret));
+ length = 0;
+ goto out;
+ }
}
if (!(info.protection & VM_PROT_WRITE))
{
- err = mach_vm_protect (task, old_address, region_length,
+ kret = mach_vm_protect (task, region_address, region_length,
FALSE, info.protection | VM_PROT_WRITE);
- if (err != KERN_SUCCESS)
+ if (kret != KERN_SUCCESS)
{
- warning
- (_("darwin_read_write_inferior: mach_vm_protect failed: %s"),
- mach_error_string (err));
+ warning (_("darwin_read_write_inf: "
+ "mach_vm_protect failed at %s (len=0x%lx): %s"),
+ core_addr_to_string (region_address),
+ (unsigned long)region_length, mach_error_string (kret));
length = 0;
goto out;
}
}
}
- err = mach_vm_write (task, low_address, copied, aligned_length);
+ kret = mach_vm_write (task, low_address, copied, aligned_length);
- if (err != KERN_SUCCESS)
+ if (kret != KERN_SUCCESS)
{
warning (_("darwin_read_write_inferior: mach_vm_write failed: %s"),
- mach_error_string (err));
+ mach_error_string (kret));
length = 0;
}
out:
return length;
}
-\f
-/* Return 0 on failure, number of bytes handled otherwise. TARGET
- is ignored. */
-static int
-darwin_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
- struct mem_attrib *attrib, struct target_ops *target)
-{
- task_t task = darwin_inf->task;
+/* Read LENGTH bytes at offset ADDR of task_dyld_info for TASK, and copy them
+ to RDADDR.
+ Return 0 on failure; number of bytes read / written otherwise. */
- if (task == MACH_PORT_NULL)
- return 0;
+#ifdef TASK_DYLD_INFO_COUNT
+/* This is not available in Darwin 9. */
+static enum target_xfer_status
+darwin_read_dyld_info (task_t task, CORE_ADDR addr, gdb_byte *rdaddr,
+ ULONGEST length, ULONGEST *xfered_len)
+{
+ struct task_dyld_info task_dyld_info;
+ mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT;
+ int sz = TASK_DYLD_INFO_COUNT * sizeof (natural_t);
+ kern_return_t kret;
- inferior_debug (8, _("darwin_xfer_memory(%s, %d, %c)\n"),
- core_addr_to_string (memaddr), len, write ? 'w' : 'r');
+ if (addr >= sz)
+ return TARGET_XFER_EOF;
- if (write)
- return darwin_read_write_inferior (task, memaddr, NULL, myaddr, len);
- else
- return darwin_read_write_inferior (task, memaddr, myaddr, NULL, len);
+ kret = task_info (task, TASK_DYLD_INFO, (task_info_t) &task_dyld_info, &count);
+ MACH_CHECK_ERROR (kret);
+ if (kret != KERN_SUCCESS)
+ return TARGET_XFER_E_IO;
+ /* Truncate. */
+ if (addr + length > sz)
+ length = sz - addr;
+ memcpy (rdaddr, (char *)&task_dyld_info + addr, length);
+ *xfered_len = (ULONGEST) length;
+ return TARGET_XFER_OK;
}
+#endif
+
+\f
-static LONGEST
+static enum target_xfer_status
darwin_xfer_partial (struct target_ops *ops,
enum target_object object, const char *annex,
gdb_byte *readbuf, const gdb_byte *writebuf,
- ULONGEST offset, LONGEST len)
+ ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
{
- inferior_debug (8, _("darwin_xfer_partial(%s, %d, rbuf=%p, wbuf=%p)\n"),
- core_addr_to_string (offset), (int)len, readbuf, writebuf);
+ struct inferior *inf = current_inferior ();
- if (object != TARGET_OBJECT_MEMORY)
- return -1;
+ inferior_debug
+ (8, _("darwin_xfer_partial(%s, %s, rbuf=%s, wbuf=%s) pid=%u\n"),
+ core_addr_to_string (offset), pulongest (len),
+ host_address_to_string (readbuf), host_address_to_string (writebuf),
+ inf->pid);
+
+ switch (object)
+ {
+ case TARGET_OBJECT_MEMORY:
+ {
+ int l = darwin_read_write_inferior (inf->private->task, offset,
+ readbuf, writebuf, len);
+
+ if (l == 0)
+ return TARGET_XFER_EOF;
+ else
+ {
+ gdb_assert (l > 0);
+ *xfered_len = (ULONGEST) l;
+ return TARGET_XFER_OK;
+ }
+ }
+#ifdef TASK_DYLD_INFO_COUNT
+ case TARGET_OBJECT_DARWIN_DYLD_INFO:
+ if (writebuf != NULL || readbuf == NULL)
+ {
+ /* Support only read. */
+ return TARGET_XFER_E_IO;
+ }
+ return darwin_read_dyld_info (inf->private->task, offset, readbuf, len,
+ xfered_len);
+#endif
+ default:
+ return TARGET_XFER_E_IO;
+ }
- return darwin_read_write_inferior (darwin_inf->task, offset,
- readbuf, writebuf, len);
}
static void
set_enable_mach_exceptions (char *args, int from_tty,
struct cmd_list_element *c)
{
- if (darwin_inf && darwin_inf->task != TASK_NULL)
+ if (!ptid_equal (inferior_ptid, null_ptid))
{
+ struct inferior *inf = current_inferior ();
exception_mask_t mask;
kern_return_t kret;
mask = EXC_MASK_ALL;
else
{
- darwin_restore_exception_ports (darwin_inf);
- mask = EXC_MASK_SOFTWARE;
+ darwin_restore_exception_ports (inf->private);
+ mask = EXC_MASK_SOFTWARE | EXC_MASK_BREAKPOINT;
}
- kret = task_set_exception_ports (darwin_inf->task, mask, darwin_ex_port,
+ kret = task_set_exception_ports (inf->private->task, mask, darwin_ex_port,
EXCEPTION_DEFAULT, THREAD_STATE_NONE);
MACH_CHECK_ERROR (kret);
}
}
+static char *
+darwin_pid_to_exec_file (struct target_ops *self, int pid)
+{
+ static char path[PATH_MAX];
+ int res;
+
+ res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX);
+ if (res >= 0)
+ return path;
+ else
+ return NULL;
+}
+
+static ptid_t
+darwin_get_ada_task_ptid (struct target_ops *self, long lwp, long thread)
+{
+ int i;
+ darwin_thread_t *t;
+ int k;
+ struct inferior *inf = current_inferior ();
+ kern_return_t kret;
+ mach_port_name_array_t names;
+ mach_msg_type_number_t names_count;
+ mach_port_type_array_t types;
+ mach_msg_type_number_t types_count;
+ long res = 0;
+
+ /* First linear search. */
+ for (k = 0;
+ VEC_iterate (darwin_thread_t, inf->private->threads, k, t);
+ k++)
+ if (t->inf_port == lwp)
+ return ptid_build (ptid_get_pid (inferior_ptid), 0, t->gdb_port);
+
+ /* Maybe the port was never extract. Do it now. */
+
+ /* First get inferior port names. */
+ kret = mach_port_names (inf->private->task, &names, &names_count, &types,
+ &types_count);
+ MACH_CHECK_ERROR (kret);
+ if (kret != KERN_SUCCESS)
+ return null_ptid;
+
+ /* For each name, copy the right in the gdb space and then compare with
+ our view of the inferior threads. We don't forget to deallocate the
+ right. */
+ for (i = 0; i < names_count; i++)
+ {
+ mach_port_t local_name;
+ mach_msg_type_name_t local_type;
+
+ /* We just need to know the corresponding name in gdb name space.
+ So extract and deallocate the right. */
+ kret = mach_port_extract_right (inf->private->task, names[i],
+ MACH_MSG_TYPE_COPY_SEND,
+ &local_name, &local_type);
+ if (kret != KERN_SUCCESS)
+ continue;
+ mach_port_deallocate (gdb_task, local_name);
+
+ for (k = 0;
+ VEC_iterate (darwin_thread_t, inf->private->threads, k, t);
+ k++)
+ if (t->gdb_port == local_name)
+ {
+ t->inf_port = names[i];
+ if (names[i] == lwp)
+ res = t->gdb_port;
+ }
+ }
+
+ vm_deallocate (gdb_task, (vm_address_t) names,
+ names_count * sizeof (mach_port_t));
+
+ if (res)
+ return ptid_build (ptid_get_pid (inferior_ptid), 0, res);
+ else
+ return null_ptid;
+}
+
+static int
+darwin_supports_multi_process (struct target_ops *self)
+{
+ return 1;
+}
+
+/* -Wmissing-prototypes */
+extern initialize_file_ftype _initialize_darwin_inferior;
+
void
-_initialize_darwin_inferior ()
+_initialize_darwin_inferior (void)
{
kern_return_t kret;
- gdb_assert (darwin_inf == NULL);
-
gdb_task = mach_task_self ();
darwin_host_self = mach_host_self ();
MACH_CHECK_ERROR (kret);
}
- darwin_inf = (struct darwin_inferior *)
- xmalloc (sizeof (struct darwin_inferior));
-
- memset (darwin_inf, 0, sizeof (*darwin_inf));
-
darwin_ops = inf_child_target ();
- darwin_ops->to_shortname = "darwin-child";
- darwin_ops->to_longname = _("Darwin child process");
- darwin_ops->to_doc =
- _("Darwin child process (started by the \"run\" command).");
darwin_ops->to_create_inferior = darwin_create_inferior;
darwin_ops->to_attach = darwin_attach;
darwin_ops->to_attach_no_wait = 0;
darwin_ops->to_detach = darwin_detach;
darwin_ops->to_files_info = darwin_files_info;
- darwin_ops->to_wait = darwin_wait;
+ darwin_ops->to_wait = darwin_wait_to;
darwin_ops->to_mourn_inferior = darwin_mourn_inferior;
darwin_ops->to_kill = darwin_kill_inferior;
darwin_ops->to_stop = darwin_stop;
- darwin_ops->to_resume = darwin_resume;
+ darwin_ops->to_resume = darwin_resume_to;
darwin_ops->to_thread_alive = darwin_thread_alive;
darwin_ops->to_pid_to_str = darwin_pid_to_str;
+ darwin_ops->to_pid_to_exec_file = darwin_pid_to_exec_file;
darwin_ops->to_load = NULL;
- darwin_ops->deprecated_xfer_memory = darwin_xfer_memory;
darwin_ops->to_xfer_partial = darwin_xfer_partial;
- darwin_ops->to_has_thread_control = tc_schedlock /*| tc_switch */;
+ darwin_ops->to_supports_multi_process = darwin_supports_multi_process;
+ darwin_ops->to_get_ada_task_ptid = darwin_get_ada_task_ptid;
darwin_complete_target (darwin_ops);
inferior_debug (2, _("GDB task: 0x%lx, pid: %d\n"), mach_task_self (),
getpid ());
- add_setshow_zinteger_cmd ("darwin", class_obscure,
- &darwin_debug_flag, _("\
+ add_setshow_zuinteger_cmd ("darwin", class_obscure,
+ &darwin_debug_flag, _("\
Set if printing inferior communication debugging statements."), _("\
Show if printing inferior communication debugging statements."), NULL,
- NULL, NULL,
- &setdebuglist, &showdebuglist);
+ NULL, NULL,
+ &setdebuglist, &showdebuglist);
add_setshow_boolean_cmd ("mach-exceptions", class_support,
&enable_mach_exceptions, _("\
projects / platform / upstream / binutils.git / blobdiff