gdb/gdbthread.h

   1 /* Multi-process/thread control defs for GDB, the GNU debugger.
   2    Copyright 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1997, 1998, 1999,
   3    2000
   4    Free Software Foundation, Inc.
   5    Contributed by Lynx Real-Time Systems, Inc.  Los Gatos, CA.
   6
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 59 Temple Place - Suite 330,
  23    Boston, MA 02111-1307, USA.  */
  24
  25 #ifndef GDBTHREAD_H
  26 #define GDBTHREAD_H
  27
  28 struct breakpoint;
  29 struct frame_id;
  30 struct symtab;
  31
  32 /* For bpstat */
  33 #include "breakpoint.h"
  34
  35 /* For struct frame_id.  */
  36 #include "frame.h"
  37
  38 struct thread_info
  39 {
  40   struct thread_info *next;
  41   ptid_t ptid;                  /* "Actual process id";
  42                                     In fact, this may be overloaded with
  43                                     kernel thread id, etc.  */
  44   int num;                      /* Convenient handle (GDB thread id) */
  45   /* State from wait_for_inferior */
  46   CORE_ADDR prev_pc;
  47   struct breakpoint *step_resume_breakpoint;
  48   CORE_ADDR step_range_start;
  49   CORE_ADDR step_range_end;
  50   struct frame_id step_frame_id;
  51   CORE_ADDR step_sp;
  52   int current_line;
  53   struct symtab *current_symtab;
  54   int trap_expected;
  55   int handling_longjmp;
  56   int another_trap;
  57
  58   /* This is set TRUE when a catchpoint of a shared library event
  59      triggers.  Since we don't wish to leave the inferior in the
  60      solib hook when we report the event, we step the inferior
  61      back to user code before stopping and reporting the event.  */
  62   int stepping_through_solib_after_catch;
  63
  64   /* When stepping_through_solib_after_catch is TRUE, this is a
  65      list of the catchpoints that should be reported as triggering
  66      when we finally do stop stepping.  */
  67   bpstat stepping_through_solib_catchpoints;
  68
  69   /* This is set to TRUE when this thread is in a signal handler
  70      trampoline and we're single-stepping through it.  */
  71   int stepping_through_sigtramp;
  72
  73   /* Private data used by the target vector implementation.  */
  74   struct private_thread_info *private;
  75 };
  76
  77 /* Create an empty thread list, or empty the existing one.  */
  78 extern void init_thread_list (void);
  79
  80 /* Add a thread to the thread list.
  81    Note that add_thread now returns the handle of the new thread,
  82    so that the caller may initialize the private thread data.  */
  83 extern struct thread_info *add_thread (ptid_t ptid);
  84
  85 /* Delete an existing thread list entry.  */
  86 extern void delete_thread (ptid_t);
  87
  88 /* Delete a step_resume_breakpoint from the thread database. */
  89 extern void delete_step_resume_breakpoint (void *);
  90
  91 /* Translate the integer thread id (GDB's homegrown id, not the system's)
  92    into a "pid" (which may be overloaded with extra thread information).  */
  93 extern ptid_t thread_id_to_pid (int);
  94
  95 /* Translate a 'pid' (which may be overloaded with extra thread information)
  96    into the integer thread id (GDB's homegrown id, not the system's).  */
  97 extern int pid_to_thread_id (ptid_t ptid);
  98
  99 /* Boolean test for an already-known pid (which may be overloaded with
 100    extra thread information).  */
 101 extern int in_thread_list (ptid_t ptid);
 102
 103 /* Boolean test for an already-known thread id (GDB's homegrown id,
 104    not the system's).  */
 105 extern int valid_thread_id (int thread);
 106
 107 /* Search function to lookup a thread by 'pid'.  */
 108 extern struct thread_info *find_thread_pid (ptid_t ptid);
 109
 110 /* Iterator function to call a user-provided callback function
 111    once for each known thread.  */
 112 typedef int (*thread_callback_func) (struct thread_info *, void *);
 113 extern struct thread_info *iterate_over_threads (thread_callback_func, void *);
 114
 115 /* infrun context switch: save the debugger state for the given thread.  */
 116 extern void save_infrun_state (ptid_t ptid,
 117                                CORE_ADDR prev_pc,
 118                                int       trap_expected,
 119                                struct breakpoint *step_resume_breakpoint,
 120                                CORE_ADDR step_range_start,
 121                                CORE_ADDR step_range_end,
 122                                const struct frame_id *step_frame_id,
 123                                int       handling_longjmp,
 124                                int       another_trap,
 125                                int       stepping_through_solib_after_catch,
 126                                bpstat    stepping_through_solib_catchpoints,
 127                                int       stepping_through_sigtramp,
 128                                int       current_line,
 129                                struct symtab *current_symtab,
 130                                CORE_ADDR step_sp);
 131
 132 /* infrun context switch: load the debugger state previously saved
 133    for the given thread.  */
 134 extern void load_infrun_state (ptid_t ptid,
 135                                CORE_ADDR *prev_pc,
 136                                int       *trap_expected,
 137                                struct breakpoint **step_resume_breakpoint,
 138                                CORE_ADDR *step_range_start,
 139                                CORE_ADDR *step_range_end,
 140                                struct frame_id *step_frame_id,
 141                                int       *handling_longjmp,
 142                                int       *another_trap,
 143                                int       *stepping_through_solib_affter_catch,
 144                                bpstat    *stepping_through_solib_catchpoints,
 145                                int       *stepping_through_sigtramp,
 146                                int       *current_line,
 147                                struct symtab **current_symtab,
 148                                CORE_ADDR *step_sp);
 149
 150 /* Commands with a prefix of `thread'.  */
 151 extern struct cmd_list_element *thread_cmd_list;
 152
 153 #endif /* GDBTHREAD_H */