gdb/inf-child.h

   1 /* Base/prototype target for default child (native) targets.
   2
   3    Copyright (C) 2004-2018 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
  25 /* A prototype child target.  The client can override it with local
  26    methods.  */
  27
  28 class inf_child_target
  29   : public memory_breakpoint_target<target_ops>
  30 {
  31 public:
  32   inf_child_target ();
  33   ~inf_child_target () override = 0;
  34
  35   const char *shortname () override
  36   { return "native"; }
  37
  38   const char *longname () override
  39   { return _("Native process"); }
  40
  41   const char *doc () override
  42   { return _("Native process (started by the \"run\" command)."); }
  43
  44   void open (const char *arg, int from_tty) override;
  45   void close () override;
  46
  47   void disconnect (const char *, int) override;
  48
  49   void fetch_registers (struct regcache *, int) override = 0;
  50   void store_registers (struct regcache *, int) override = 0;
  51
  52   void prepare_to_store (struct regcache *) override;
  53
  54   bool supports_terminal_ours () override;
  55   void terminal_init () override;
  56   void terminal_inferior () override;
  57   void terminal_ours_for_output () override;
  58   void terminal_ours () override;
  59   void terminal_info (const char *, int) override;
  60
  61   void interrupt () override;
  62   void pass_ctrlc () override;
  63
  64   void post_startup_inferior (ptid_t) override;
  65
  66   void mourn_inferior () override;
  67
  68   bool can_run () override;
  69
  70   bool can_create_inferior () override;
  71   void create_inferior (const char *, const std::string &,
  72                         char **, int) override = 0;
  73
  74   bool can_attach () override;
  75   void attach (const char *, int) override = 0;
  76
  77   void post_attach (int) override;
  78
  79   /* We must default these because they must be implemented by any
  80      target that can run.  */
  81   bool can_async_p ()  override { return false; }
  82   bool supports_non_stop ()  override { return false; }
  83   bool supports_disable_randomization () override { return false; }
  84
  85   char *pid_to_exec_file (int pid) override;
  86
  87   bool has_all_memory () override;
  88   bool has_memory () override;
  89   bool has_stack () override;
  90   bool has_registers () override;
  91   bool has_execution (ptid_t) override;
  92
  93   int fileio_open (struct inferior *inf, const char *filename,
  94                    int flags, int mode, int warn_if_slow,
  95                    int *target_errno) override;
  96   int fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
  97                      ULONGEST offset, int *target_errno) override;
  98   int fileio_pread (int fd, gdb_byte *read_buf, int len,
  99                     ULONGEST offset, int *target_errno) override;
 100   int fileio_fstat (int fd, struct stat *sb, int *target_errno) override;
 101   int fileio_close (int fd, int *target_errno) override;
 102   int fileio_unlink (struct inferior *inf,
 103                      const char *filename,
 104                      int *target_errno) override;
 105   gdb::optional<std::string> fileio_readlink (struct inferior *inf,
 106                                               const char *filename,
 107                                               int *target_errno) override;
 108   bool use_agent (bool use) override;
 109
 110   bool can_use_agent () override;
 111
 112 protected:
 113   /* Unpush the target if it wasn't explicitly open with "target native"
 114      and there are no live inferiors left.  Note: if calling this as a
 115      result of a mourn or detach, the current inferior shall already
 116      have its PID cleared, so it isn't counted as live.  That's usually
 117      done by calling either generic_mourn_inferior or
 118      detach_inferior.  */
 119   void maybe_unpush_target ();
 120 };
 121
 122 /* Functions for helping to write a native target.  */
 123
 124 /* This is for native targets which use a unix/POSIX-style waitstatus.  */
 125 extern void store_waitstatus (struct target_waitstatus *, int);
 126
 127 #endif