gdb/inf-child.h

   1 /* Base/prototype target for default child (native) targets.
   2
   3    Copyright (C) 2004-2022 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef INF_CHILD_H
  21 #define INF_CHILD_H
  22
  23 #include "target.h"
  24 #include "process-stratum-target.h"
  25
  26 /* A prototype child target.  The client can override it with local
  27    methods.  */
  28
  29 class inf_child_target
  30   : public memory_breakpoint_target<process_stratum_target>
  31 {
  32 public:
  33   inf_child_target () = default;
  34   ~inf_child_target () override = 0;
  35
  36   const target_info &info () const override;
  37
  38   void close () override;
  39
  40   void disconnect (const char *, int) override;
  41
  42   void fetch_registers (struct regcache *, int) override = 0;
  43   void store_registers (struct regcache *, int) override = 0;
  44
  45   void prepare_to_store (struct regcache *) override;
  46
  47   bool supports_terminal_ours () override;
  48   void terminal_init () override;
  49   void terminal_inferior () override;
  50   void terminal_save_inferior () override;
  51   void terminal_ours_for_output () override;
  52   void terminal_ours () override;
  53   void terminal_info (const char *, int) override;
  54
  55   void interrupt () override;
  56   void pass_ctrlc () override;
  57
  58   void follow_exec (inferior *follow_inf, ptid_t ptid,
  59                     const char *execd_pathname) override;
  60
  61   void mourn_inferior () override;
  62
  63   bool can_run () override;
  64
  65   bool can_create_inferior () override;
  66   void create_inferior (const char *, const std::string &,
  67                         char **, int) override = 0;
  68
  69   bool can_attach () override;
  70   void attach (const char *, int) override = 0;
  71
  72   void post_attach (int) override;
  73
  74   const char *pid_to_exec_file (int pid) override;
  75
  76   int fileio_open (struct inferior *inf, const char *filename,
  77                    int flags, int mode, int warn_if_slow,
  78                    int *target_errno) override;
  79   int fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
  80                      ULONGEST offset, int *target_errno) override;
  81   int fileio_pread (int fd, gdb_byte *read_buf, int len,
  82                     ULONGEST offset, int *target_errno) override;
  83   int fileio_fstat (int fd, struct stat *sb, int *target_errno) override;
  84   int fileio_close (int fd, int *target_errno) override;
  85   int fileio_unlink (struct inferior *inf,
  86                      const char *filename,
  87                      int *target_errno) override;
  88   gdb::optional<std::string> fileio_readlink (struct inferior *inf,
  89                                               const char *filename,
  90                                               int *target_errno) override;
  91   bool use_agent (bool use) override;
  92
  93   bool can_use_agent () override;
  94
  95 protected:
  96   /* Unpush the target if it wasn't explicitly open with "target native"
  97      and there are no live inferiors left.  Note: if calling this as a
  98      result of a mourn or detach, the current inferior shall already
  99      have its PID cleared, so it isn't counted as live.  That's usually
 100      done by calling either generic_mourn_inferior or
 101      detach_inferior.  */
 102   void maybe_unpush_target ();
 103 };
 104
 105 /* Convert the host wait(2) status to a target_waitstatus.  */
 106
 107 extern target_waitstatus host_status_to_waitstatus (int hoststatus);
 108
 109 /* Register TARGET as native target and set it up to respond to the
 110    "target native" command.  */
 111 extern void add_inf_child_target (inf_child_target *target);
 112
 113 /* target_open_ftype callback for inf-child targets.  Used by targets
 114    that want to register an alternative target_info object.  Most
 115    targets use add_inf_child_target instead.  */
 116 extern void inf_child_open_target (const char *arg, int from_tty);
 117
 118 #endif