gdb/infrun.h

   1 /* Copyright (C) 1986-2016 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
  23 struct target_waitstatus;
  24 struct frame_info;
  25 struct address_space;
  26 struct return_value_info;
  27
  28 /* True if we are debugging run control.  */
  29 extern unsigned int debug_infrun;
  30
  31 /* True if we are debugging displaced stepping.  */
  32 extern int debug_displaced;
  33
  34 /* Nonzero if we want to give control to the user when we're notified
  35    of shared library events by the dynamic linker.  */
  36 extern int stop_on_solib_events;
  37
  38 /* Are we simulating synchronous execution? This is used in async gdb
  39    to implement the 'run', 'continue' etc commands, which will not
  40    redisplay the prompt until the execution is actually over.  */
  41 extern int sync_execution;
  42
  43 /* True if execution commands resume all threads of all processes by
  44    default; otherwise, resume only threads of the current inferior
  45    process.  */
  46 extern int sched_multi;
  47
  48 /* When set, stop the 'step' command if we enter a function which has
  49    no line number information.  The normal behavior is that we step
  50    over such function.  */
  51 extern int step_stop_if_no_debug;
  52
  53 /* If set, the inferior should be controlled in non-stop mode.  In
  54    this mode, each thread is controlled independently.  Execution
  55    commands apply only to the selected thread by default, and stop
  56    events stop only the thread that had the event -- the other threads
  57    are kept running freely.  */
  58 extern int non_stop;
  59
  60 /* When set (default), the target should attempt to disable the
  61    operating system's address space randomization feature when
  62    starting an inferior.  */
  63 extern int disable_randomization;
  64
  65 /* Returns a unique identifier for the current stop.  This can be used
  66    to tell whether a command has proceeded the inferior past the
  67    current location.  */
  68 extern ULONGEST get_stop_id (void);
  69
  70 /* Reverse execution.  */
  71 enum exec_direction_kind
  72   {
  73     EXEC_FORWARD,
  74     EXEC_REVERSE
  75   };
  76
  77 /* The current execution direction.  */
  78 extern enum exec_direction_kind execution_direction;
  79
  80 extern void start_remote (int from_tty);
  81
  82 /* Clear out all variables saying what to do when inferior is
  83    continued or stepped.  First do this, then set the ones you want,
  84    then call `proceed'.  STEP indicates whether we're preparing for a
  85    step/stepi command.  */
  86 extern void clear_proceed_status (int step);
  87
  88 extern void proceed (CORE_ADDR, enum gdb_signal);
  89
  90 /* The `resume' routine should only be called in special circumstances.
  91    Normally, use `proceed', which handles a lot of bookkeeping.  */
  92 extern void resume (enum gdb_signal);
  93
  94 /* Return a ptid representing the set of threads that we will proceed,
  95    in the perspective of the user/frontend.  We may actually resume
  96    fewer threads at first, e.g., if a thread is stopped at a
  97    breakpoint that needs stepping-off, but that should not be visible
  98    to the user/frontend, and neither should the frontend/user be
  99    allowed to proceed any of the threads that happen to be stopped for
 100    internal run control handling, if a previous command wanted them
 101    resumed.  */
 102 extern ptid_t user_visible_resume_ptid (int step);
 103
 104 extern void wait_for_inferior (void);
 105
 106 /* Return control to GDB when the inferior stops for real.  Print
 107    appropriate messages, remove breakpoints, give terminal our modes,
 108    and run the stop hook.  Returns true if the stop hook proceeded the
 109    target, false otherwise.  */
 110 extern int normal_stop (void);
 111
 112 extern void get_last_target_status (ptid_t *ptid,
 113                                     struct target_waitstatus *status);
 114
 115 extern void set_last_target_status (ptid_t ptid,
 116                                     struct target_waitstatus status);
 117
 118 /* Stop all threads.  Only returns after everything is halted.  */
 119 extern void stop_all_threads (void);
 120
 121 extern void prepare_for_detach (void);
 122
 123 extern void fetch_inferior_event (void *);
 124
 125 extern void init_wait_for_inferior (void);
 126
 127 extern void insert_step_resume_breakpoint_at_sal (struct gdbarch *,
 128                                                   struct symtab_and_line ,
 129                                                   struct frame_id);
 130
 131 /* Returns true if we're trying to step past the instruction at
 132    ADDRESS in ASPACE.  */
 133 extern int stepping_past_instruction_at (struct address_space *aspace,
 134                                          CORE_ADDR address);
 135
 136 /* Returns true if thread whose thread number is THREAD is stepping
 137    over a breakpoint.  */
 138 extern int thread_is_stepping_over_breakpoint (int thread);
 139
 140 /* Returns true if we're trying to step past an instruction that
 141    triggers a non-steppable watchpoint.  */
 142 extern int stepping_past_nonsteppable_watchpoint (void);
 143
 144 extern void set_step_info (struct frame_info *frame,
 145                            struct symtab_and_line sal);
 146
 147 /* Several print_*_reason helper functions to print why the inferior
 148    has stopped to the passed in UIOUT.  */
 149
 150 /* Signal received, print why the inferior has stopped.  */
 151 extern void print_signal_received_reason (struct ui_out *uiout,
 152                                           enum gdb_signal siggnal);
 153
 154 /* Print why the inferior has stopped.  We are done with a
 155    step/next/si/ni command, print why the inferior has stopped.  */
 156 extern void print_end_stepping_range_reason (struct ui_out *uiout);
 157
 158 /* The inferior was terminated by a signal, print why it stopped.  */
 159 extern void print_signal_exited_reason (struct ui_out *uiout,
 160                                         enum gdb_signal siggnal);
 161
 162 /* The inferior program is finished, print why it stopped.  */
 163 extern void print_exited_reason (struct ui_out *uiout, int exitstatus);
 164
 165 /* Reverse execution: target ran out of history info, print why the
 166    inferior has stopped.  */
 167 extern void print_no_history_reason (struct ui_out *uiout);
 168
 169 /* Print the result of a function at the end of a 'finish' command.
 170    RV points at an object representing the captured return value/type
 171    and its position in the value history.  */
 172
 173 extern void print_return_value (struct ui_out *uiout,
 174                                 struct return_value_info *rv);
 175
 176 /* Print current location without a level number, if we have changed
 177    functions or hit a breakpoint.  Print source line if we have one.
 178    If the execution command captured a return value, print it.  */
 179
 180 extern void print_stop_event (struct ui_out *uiout);
 181
 182 /* Pretty print the results of target_wait, for debugging purposes.  */
 183
 184 extern void print_target_wait_results (ptid_t waiton_ptid, ptid_t result_ptid,
 185                                        const struct target_waitstatus *ws);
 186
 187 extern int signal_stop_state (int);
 188
 189 extern int signal_print_state (int);
 190
 191 extern int signal_pass_state (int);
 192
 193 extern int signal_stop_update (int, int);
 194
 195 extern int signal_print_update (int, int);
 196
 197 extern int signal_pass_update (int, int);
 198
 199 extern void update_signals_program_target (void);
 200
 201 /* Clear the convenience variables associated with the exit of the
 202    inferior.  Currently, those variables are $_exitcode and
 203    $_exitsignal.  */
 204 extern void clear_exit_convenience_vars (void);
 205
 206 /* Dump LEN bytes at BUF in hex to FILE, followed by a newline.  */
 207 extern void displaced_step_dump_bytes (struct ui_file *file,
 208                                        const gdb_byte *buf, size_t len);
 209
 210 extern struct displaced_step_closure *get_displaced_step_closure_by_addr
 211     (CORE_ADDR addr);
 212
 213 extern void update_observer_mode (void);
 214
 215 extern void signal_catch_update (const unsigned int *);
 216
 217 /* In some circumstances we allow a command to specify a numeric
 218    signal.  The idea is to keep these circumstances limited so that
 219    users (and scripts) develop portable habits.  For comparison,
 220    POSIX.2 `kill' requires that 1,2,3,6,9,14, and 15 work (and using a
 221    numeric signal at all is obsolescent.  We are slightly more lenient
 222    and allow 1-15 which should match host signal numbers on most
 223    systems.  Use of symbolic signal names is strongly encouraged.  */
 224 enum gdb_signal gdb_signal_from_command (int num);
 225
 226 /* Enables/disables infrun's async event source in the event loop.  */
 227 extern void infrun_async (int enable);
 228
 229 /* Call infrun's event handler the next time through the event
 230    loop.  */
 231 extern void mark_infrun_async_event_handler (void);
 232
 233 /* The global queue of threads that need to do a step-over operation
 234    to get past e.g., a breakpoint.  */
 235 extern struct thread_info *step_over_queue_head;
 236
 237 /* Remove breakpoints if possible (usually that means, if everything
 238    is stopped).  On failure, print a message.  */
 239 extern void maybe_remove_breakpoints (void);
 240
 241 #endif /* INFRUN_H */