gdb/infrun.h

   1 /* Copyright (C) 1986-2018 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef INFRUN_H
  19 #define INFRUN_H 1
  20
  21 #include "symtab.h"
  22 #include "common/byte-vector.h"
  23
  24 struct target_waitstatus;
  25 struct frame_info;
  26 struct address_space;
  27 struct return_value_info;
  28
  29 /* True if we are debugging run control.  */
  30 extern unsigned int debug_infrun;
  31
  32 /* True if we are debugging displaced stepping.  */
  33 extern int debug_displaced;
  34
  35 /* Nonzero if we want to give control to the user when we're notified
  36    of shared library events by the dynamic linker.  */
  37 extern int stop_on_solib_events;
  38
  39 /* True if execution commands resume all threads of all processes by
  40    default; otherwise, resume only threads of the current inferior
  41    process.  */
  42 extern int sched_multi;
  43
  44 /* When set, stop the 'step' command if we enter a function which has
  45    no line number information.  The normal behavior is that we step
  46    over such function.  */
  47 extern int step_stop_if_no_debug;
  48
  49 /* If set, the inferior should be controlled in non-stop mode.  In
  50    this mode, each thread is controlled independently.  Execution
  51    commands apply only to the selected thread by default, and stop
  52    events stop only the thread that had the event -- the other threads
  53    are kept running freely.  */
  54 extern int non_stop;
  55
  56 /* When set (default), the target should attempt to disable the
  57    operating system's address space randomization feature when
  58    starting an inferior.  */
  59 extern int disable_randomization;
  60
  61 /* Returns a unique identifier for the current stop.  This can be used
  62    to tell whether a command has proceeded the inferior past the
  63    current location.  */
  64 extern ULONGEST get_stop_id (void);
  65
  66 /* Reverse execution.  */
  67 enum exec_direction_kind
  68   {
  69     EXEC_FORWARD,
  70     EXEC_REVERSE
  71   };
  72
  73 /* The current execution direction.  */
  74 extern enum exec_direction_kind execution_direction;
  75
  76 extern void start_remote (int from_tty);
  77
  78 /* Clear out all variables saying what to do when inferior is
  79    continued or stepped.  First do this, then set the ones you want,
  80    then call `proceed'.  STEP indicates whether we're preparing for a
  81    step/stepi command.  */
  82 extern void clear_proceed_status (int step);
  83
  84 extern void proceed (CORE_ADDR, enum gdb_signal);
  85
  86 /* The `resume' routine should only be called in special circumstances.
  87    Normally, use `proceed', which handles a lot of bookkeeping.  */
  88 extern void resume (enum gdb_signal);
  89
  90 /* Return a ptid representing the set of threads that we will proceed,
  91    in the perspective of the user/frontend.  We may actually resume
  92    fewer threads at first, e.g., if a thread is stopped at a
  93    breakpoint that needs stepping-off, but that should not be visible
  94    to the user/frontend, and neither should the frontend/user be
  95    allowed to proceed any of the threads that happen to be stopped for
  96    internal run control handling, if a previous command wanted them
  97    resumed.  */
  98 extern ptid_t user_visible_resume_ptid (int step);
  99
 100 extern void wait_for_inferior (void);
 101
 102 /* Return control to GDB when the inferior stops for real.  Print
 103    appropriate messages, remove breakpoints, give terminal our modes,
 104    and run the stop hook.  Returns true if the stop hook proceeded the
 105    target, false otherwise.  */
 106 extern int normal_stop (void);
 107
 108 extern void get_last_target_status (ptid_t *ptid,
 109                                     struct target_waitstatus *status);
 110
 111 extern void set_last_target_status (ptid_t ptid,
 112                                     struct target_waitstatus status);
 113
 114 /* Stop all threads.  Only returns after everything is halted.  */
 115 extern void stop_all_threads (void);
 116
 117 extern void prepare_for_detach (void);
 118
 119 extern void fetch_inferior_event (void *);
 120
 121 extern void init_wait_for_inferior (void);
 122
 123 extern void insert_step_resume_breakpoint_at_sal (struct gdbarch *,
 124                                                   struct symtab_and_line ,
 125                                                   struct frame_id);
 126
 127 /* Returns true if we're trying to step past the instruction at
 128    ADDRESS in ASPACE.  */
 129 extern int stepping_past_instruction_at (struct address_space *aspace,
 130                                          CORE_ADDR address);
 131
 132 /* Returns true if thread whose thread number is THREAD is stepping
 133    over a breakpoint.  */
 134 extern int thread_is_stepping_over_breakpoint (int thread);
 135
 136 /* Returns true if we're trying to step past an instruction that
 137    triggers a non-steppable watchpoint.  */
 138 extern int stepping_past_nonsteppable_watchpoint (void);
 139
 140 extern void set_step_info (struct frame_info *frame,
 141                            struct symtab_and_line sal);
 142
 143 /* Several print_*_reason helper functions to print why the inferior
 144    has stopped to the passed in UIOUT.  */
 145
 146 /* Signal received, print why the inferior has stopped.  */
 147 extern void print_signal_received_reason (struct ui_out *uiout,
 148                                           enum gdb_signal siggnal);
 149
 150 /* Print why the inferior has stopped.  We are done with a
 151    step/next/si/ni command, print why the inferior has stopped.  */
 152 extern void print_end_stepping_range_reason (struct ui_out *uiout);
 153
 154 /* The inferior was terminated by a signal, print why it stopped.  */
 155 extern void print_signal_exited_reason (struct ui_out *uiout,
 156                                         enum gdb_signal siggnal);
 157
 158 /* The inferior program is finished, print why it stopped.  */
 159 extern void print_exited_reason (struct ui_out *uiout, int exitstatus);
 160
 161 /* Reverse execution: target ran out of history info, print why the
 162    inferior has stopped.  */
 163 extern void print_no_history_reason (struct ui_out *uiout);
 164
 165 /* Print the result of a function at the end of a 'finish' command.
 166    RV points at an object representing the captured return value/type
 167    and its position in the value history.  */
 168
 169 extern void print_return_value (struct ui_out *uiout,
 170                                 struct return_value_info *rv);
 171
 172 /* Print current location without a level number, if we have changed
 173    functions or hit a breakpoint.  Print source line if we have one.
 174    If the execution command captured a return value, print it.  */
 175
 176 extern void print_stop_event (struct ui_out *uiout);
 177
 178 /* Pretty print the results of target_wait, for debugging purposes.  */
 179
 180 extern void print_target_wait_results (ptid_t waiton_ptid, ptid_t result_ptid,
 181                                        const struct target_waitstatus *ws);
 182
 183 extern int signal_stop_state (int);
 184
 185 extern int signal_print_state (int);
 186
 187 extern int signal_pass_state (int);
 188
 189 extern int signal_stop_update (int, int);
 190
 191 extern int signal_print_update (int, int);
 192
 193 extern int signal_pass_update (int, int);
 194
 195 extern void update_signals_program_target (void);
 196
 197 /* Clear the convenience variables associated with the exit of the
 198    inferior.  Currently, those variables are $_exitcode and
 199    $_exitsignal.  */
 200 extern void clear_exit_convenience_vars (void);
 201
 202 /* Dump LEN bytes at BUF in hex to FILE, followed by a newline.  */
 203 extern void displaced_step_dump_bytes (struct ui_file *file,
 204                                        const gdb_byte *buf, size_t len);
 205
 206 extern struct displaced_step_closure *get_displaced_step_closure_by_addr
 207     (CORE_ADDR addr);
 208
 209 extern void update_observer_mode (void);
 210
 211 extern void signal_catch_update (const unsigned int *);
 212
 213 /* In some circumstances we allow a command to specify a numeric
 214    signal.  The idea is to keep these circumstances limited so that
 215    users (and scripts) develop portable habits.  For comparison,
 216    POSIX.2 `kill' requires that 1,2,3,6,9,14, and 15 work (and using a
 217    numeric signal at all is obsolescent.  We are slightly more lenient
 218    and allow 1-15 which should match host signal numbers on most
 219    systems.  Use of symbolic signal names is strongly encouraged.  */
 220 enum gdb_signal gdb_signal_from_command (int num);
 221
 222 /* Enables/disables infrun's async event source in the event loop.  */
 223 extern void infrun_async (int enable);
 224
 225 /* Call infrun's event handler the next time through the event
 226    loop.  */
 227 extern void mark_infrun_async_event_handler (void);
 228
 229 /* The global queue of threads that need to do a step-over operation
 230    to get past e.g., a breakpoint.  */
 231 extern struct thread_info *step_over_queue_head;
 232
 233 /* Remove breakpoints if possible (usually that means, if everything
 234    is stopped).  On failure, print a message.  */
 235 extern void maybe_remove_breakpoints (void);
 236
 237 /* If a UI was in sync execution mode, and now isn't, restore its
 238    prompt (a synchronous execution command has finished, and we're
 239    ready for input).  */
 240 extern void all_uis_check_sync_execution_done (void);
 241
 242 /* If a UI was in sync execution mode, and hasn't displayed the prompt
 243    yet, re-disable its prompt (a synchronous execution command was
 244    started or re-started).  */
 245 extern void all_uis_on_sync_execution_starting (void);
 246
 247 /* Base class for displaced stepping closures (the arch-specific data).  */
 248
 249 struct displaced_step_closure
 250 {
 251   virtual ~displaced_step_closure () = 0;
 252 };
 253
 254 /* A simple displaced step closure that contains only a byte buffer.  */
 255
 256 struct buf_displaced_step_closure : displaced_step_closure
 257 {
 258   buf_displaced_step_closure (int buf_size)
 259   : buf (buf_size)
 260   {}
 261
 262   gdb::byte_vector buf;
 263 };
 264
 265 #endif /* INFRUN_H */