gdb/darwin-nat.h

   1 /* Common things used by the various darwin files
   2    Copyright (C) 1995-2013 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 #ifndef __DARWIN_NAT_H__
  19 #define __DARWIN_NAT_H__
  20
  21 #include <mach/mach.h>
  22 #include "gdb_assert.h"
  23
  24 /* Describe the mach exception handling state for a task.  This state is saved
  25    before being changed and restored when a process is detached.
  26    For more information on these fields see task_get_exception_ports manual
  27    page.  */
  28 struct darwin_exception_info
  29 {
  30   /* Exceptions handled by the port.  */
  31   exception_mask_t masks[EXC_TYPES_COUNT];
  32
  33   /* Ports receiving exception messages.  */
  34   mach_port_t ports[EXC_TYPES_COUNT];
  35
  36   /* Type of messages sent.  */
  37   exception_behavior_t behaviors[EXC_TYPES_COUNT];
  38
  39   /* Type of state to be sent.  */
  40   thread_state_flavor_t flavors[EXC_TYPES_COUNT];
  41
  42   /* Number of elements set.  */
  43   mach_msg_type_number_t count;
  44 };
  45 typedef struct darwin_exception_info darwin_exception_info;
  46
  47 struct darwin_exception_msg
  48 {
  49   mach_msg_header_t header;
  50
  51   /* Thread and task taking the exception.  */
  52   mach_port_t thread_port;
  53   mach_port_t task_port;
  54
  55   /* Type of the exception.  */
  56   exception_type_t ex_type;
  57
  58   /* Machine dependent details.  */
  59   mach_msg_type_number_t data_count;
  60   integer_t ex_data[2];
  61 };
  62
  63 enum darwin_msg_state
  64 {
  65   /* The thread is running.  */
  66   DARWIN_RUNNING,
  67
  68   /* The thread is stopped.  */
  69   DARWIN_STOPPED,
  70
  71   /* The thread has sent a message and waits for a reply.  */
  72   DARWIN_MESSAGE
  73 };
  74
  75 struct private_thread_info
  76 {
  77   /* The thread port from a GDB point of view.  */
  78   thread_t gdb_port;
  79
  80   /* The thread port from the inferior point of view.  Not to be used inside
  81      gdb except for get_ada_task_ptid.  */
  82   thread_t inf_port;
  83
  84   /* Current message state.
  85      If the kernel has sent a message it expects a reply and the inferior
  86      can't be killed before.  */
  87   enum darwin_msg_state msg_state;
  88
  89   /* True if this thread is single-stepped.  */
  90   unsigned char single_step;
  91
  92   /* True if a signal was manually sent to the thread.  */
  93   unsigned char signaled;
  94
  95   /* The last exception received.  */
  96   struct darwin_exception_msg event;
  97 };
  98 typedef struct private_thread_info darwin_thread_t;
  99
 100 /* Define the threads vector type.  */
 101 DEF_VEC_O (darwin_thread_t);
 102
 103
 104 /* Describe an inferior.  */
 105 struct private_inferior
 106 {
 107   /* Corresponding task port.  */
 108   task_t task;
 109
 110   /* Port which will receive the dead-name notification for the task port.
 111      This is used to detect the death of the task.  */
 112   mach_port_t notify_port;
 113
 114   /* Initial exception handling.  */
 115   darwin_exception_info exception_info;
 116
 117   /* Number of messages that have been received but not yet replied.  */
 118   unsigned int pending_messages;
 119
 120   /* Set if inferior is not controlled by ptrace(2) but through Mach.  */
 121   unsigned char no_ptrace;
 122
 123   /* True if this task is suspended.  */
 124   unsigned char suspended;
 125
 126   /* Sorted vector of known threads.  */
 127   VEC(darwin_thread_t) *threads;
 128 };
 129 typedef struct private_inferior darwin_inferior;
 130
 131 /* Exception port.  */
 132 extern mach_port_t darwin_ex_port;
 133
 134 /* Port set.  */
 135 extern mach_port_t darwin_port_set;
 136
 137 /* A copy of mach_host_self ().  */
 138 extern mach_port_t darwin_host_self;
 139
 140 /* ASSERT_FUNCTION is defined in gdb_assert.h (or not).  */
 141 #ifdef ASSERT_FUNCTION
 142 #define MACH_CHECK_ERROR(ret) \
 143   mach_check_error (ret, __FILE__, __LINE__, ASSERT_FUNCTION)
 144 #else
 145 #define MACH_CHECK_ERROR(ret) \
 146   mach_check_error (ret, __FILE__, __LINE__, "??")
 147 #endif
 148
 149 extern void mach_check_error (kern_return_t ret, const char *file,
 150                               unsigned int line, const char *func);
 151
 152 void darwin_set_sstep (thread_t thread, int enable);
 153
 154 /* This one is called in darwin-nat.c, but needs to be provided by the
 155    platform specific nat code.  It allows each platform to add platform specific
 156    stuff to the darwin_ops.  */
 157 extern void darwin_complete_target (struct target_ops *target);
 158
 159 void darwin_check_osabi (darwin_inferior *inf, thread_t thread);
 160
 161 #endif /* __DARWIN_NAT_H__ */