/* Abstract base class inherited by all process_stratum targets

   Copyright (C) 2018-2020 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "process-stratum-target.h"
#include "inferior.h"

process_stratum_target::~process_stratum_target ()
{
}

struct address_space *
process_stratum_target::thread_address_space (ptid_t ptid)
{
  /* Fall-back to the "main" address space of the inferior.  */
  inferior *inf = find_inferior_ptid (this, ptid);

  if (inf == NULL || inf->aspace == NULL)
    internal_error (__FILE__, __LINE__,
		    _("Can't determine the current "
		      "address space of thread %s\n"),
		    target_pid_to_str (ptid).c_str ());

  return inf->aspace;
}

struct gdbarch *
process_stratum_target::thread_architecture (ptid_t ptid)
{
  inferior *inf = find_inferior_ptid (this, ptid);
  gdb_assert (inf != NULL);
  return inf->gdbarch;
}

bool
process_stratum_target::has_all_memory ()
{
  /* If no inferior selected, then we can't read memory here.  */
  return inferior_ptid != null_ptid;
}

bool
process_stratum_target::has_memory ()
{
  /* If no inferior selected, then we can't read memory here.  */
  return inferior_ptid != null_ptid;
}

bool
process_stratum_target::has_stack ()
{
  /* If no inferior selected, there's no stack.  */
  return inferior_ptid != null_ptid;
}

bool
process_stratum_target::has_registers ()
{
  /* Can't read registers from no inferior.  */
  return inferior_ptid != null_ptid;
}

bool
process_stratum_target::has_execution (inferior *inf)
{
  /* If there's a process running already, we can't make it run
     through hoops.  */
  return inf->pid != 0;
}

/* See process-stratum-target.h.  */

std::set<process_stratum_target *>
all_non_exited_process_targets ()
{
  /* Inferiors may share targets.  To eliminate duplicates, use a set.  */
  std::set<process_stratum_target *> targets;
  for (inferior *inf : all_non_exited_inferiors ())
    targets.insert (inf->process_target ());

  return targets;
}

/* See process-stratum-target.h.  */

void
switch_to_target_no_thread (process_stratum_target *target)
{
  for (inferior *inf : all_inferiors (target))
    {
      switch_to_inferior_no_thread (inf);
      break;
    }
}