binutils-gdb/gdbserver/inferiors.h

/* Inferior process information for the remote server for GDB.
   Copyright (C) 1993-2020 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/>.  */

#ifndef GDBSERVER_INFERIORS_H
#define GDBSERVER_INFERIORS_H

#include "gdbsupport/gdb_vecs.h"
#include <list>

struct thread_info;
struct regcache;
struct target_desc;
struct sym_cache;
struct breakpoint;
struct raw_breakpoint;
struct fast_tracepoint_jump;
struct process_info_private;

struct process_info
{
  process_info (int pid_, int attached_)
  : pid (pid_), attached (attached_)
  {}

  /* This process' pid.  */
  int pid;

  /* Nonzero if this child process was attached rather than
     spawned.  */
  int attached;

  /* True if GDB asked us to detach from this process, but we remained
     attached anyway.  */
  int gdb_detached = 0;

  /* The symbol cache.  */
  struct sym_cache *symbol_cache = NULL;

  /* The list of memory breakpoints.  */
  struct breakpoint *breakpoints = NULL;

  /* The list of raw memory breakpoints.  */
  struct raw_breakpoint *raw_breakpoints = NULL;

  /* The list of installed fast tracepoints.  */
  struct fast_tracepoint_jump *fast_tracepoint_jumps = NULL;

  /* The list of syscalls to report, or just a single element, ANY_SYSCALL,
     for unfiltered syscall reporting.  */
  std::vector<int> syscalls_to_catch;

  const struct target_desc *tdesc = NULL;

  /* Private target data.  */
  struct process_info_private *priv = NULL;
};

/* Get the pid of PROC.  */

static inline int
pid_of (const process_info *proc)
{
  return proc->pid;
}

/* Return a pointer to the process that corresponds to the current
   thread (current_thread).  It is an error to call this if there is
   no current thread selected.  */

struct process_info *current_process (void);
struct process_info *get_thread_process (const struct thread_info *);

extern std::list<process_info *> all_processes;

/* Invoke FUNC for each process.  */

template <typename Func>
static void
for_each_process (Func func)
{
  std::list<process_info *>::iterator next, cur = all_processes.begin ();

  while (cur != all_processes.end ())
    {
      next = cur;
      next++;
      func (*cur);
      cur = next;
    }
}

/* Find the first process for which FUNC returns true.  Return NULL if no
   process satisfying FUNC is found.  */

template <typename Func>
static process_info *
find_process (Func func)
{
  std::list<process_info *>::iterator next, cur = all_processes.begin ();

  while (cur != all_processes.end ())
    {
      next = cur;
      next++;

      if (func (*cur))
	return *cur;

      cur = next;
    }

  return NULL;
}

extern struct thread_info *current_thread;

/* Return the first process in the processes list.  */
struct process_info *get_first_process (void);

struct process_info *add_process (int pid, int attached);
void remove_process (struct process_info *process);
struct process_info *find_process_pid (int pid);
int have_started_inferiors_p (void);
int have_attached_inferiors_p (void);

/* Switch to a thread of PROC.  */
void switch_to_process (process_info *proc);

void clear_inferiors (void);

void *thread_target_data (struct thread_info *);
struct regcache *thread_regcache_data (struct thread_info *);
void set_thread_regcache_data (struct thread_info *, struct regcache *);

#endif /* GDBSERVER_INFERIORS_H */