gdb/

	* inferior.h: Forward declare struct ui_out.
	Forward declare struct private_inferior.
	(struct inferior): New.
	(init_inferior_list, add_inferior, add_inferior_silent)
	(delete_inferior, delete_inferior_silent, detach_inferior)
	(gdb_inferior_id_to_pid, pid_to_gdb_inferior_id, in_inferior_list)
	(valid_inferior_id, find_inferior_pid): New functions.
	(inferior_callback_func): New typedef.
	(iterate_over_inferiors, print_inferior, have_inferiors)
	(current_inferior): New functions.
	* inferior.c: New file.

	* Makefile.in (SFILES): Add inferior.c.
	(COMMON_OBS): Add inferior.o.

gdb/doc/
	* gdb.texinfo (Inferiors): New section.

1 files changed, 332 insertions, 0 deletions

diff --git a/gdb/inferior.c b/gdb/inferior.c
new file mode 100644
index 00000000000..2c9c0af0873
--- /dev/null
+++ b/gdb/inferior.c
@@ -0,0 +1,332 @@
+/* Multi-process control for GDB, the GNU debugger.
+
+   Copyright (C) 2008 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 "inferior.h"
+#include "target.h"
+#include "command.h"
+#include "gdbcmd.h"
+#include "gdbthread.h"
+#include "ui-out.h"
+
+void _initialize_inferiors (void);
+
+static struct inferior *inferior_list = NULL;
+static int highest_inferior_num;
+
+/* Print notices on inferior events (attach, detach, etc.), set with
+   `set print inferior-events'.  */
+static int print_inferior_events = 0;
+
+struct inferior*
+current_inferior (void)
+{
+  struct inferior *inf = find_inferior_pid (ptid_get_pid (inferior_ptid));
+  gdb_assert (inf);
+  return inf;
+}
+
+static void
+free_inferior (struct inferior *inf)
+{
+  xfree (inf->private);
+  xfree (inf);
+}
+
+void
+init_inferior_list (void)
+{
+  struct inferior *inf, *infnext;
+
+  highest_inferior_num = 0;
+  if (!inferior_list)
+    return;
+
+  for (inf = inferior_list; inf; inf = infnext)
+    {
+      infnext = inf->next;
+      free_inferior (inf);
+    }
+
+  inferior_list = NULL;
+}
+
+struct inferior *
+add_inferior_silent (int pid)
+{
+  struct inferior *inf;
+
+  inf = xmalloc (sizeof (*inf));
+  memset (inf, 0, sizeof (*inf));
+  inf->pid = pid;
+
+  inf->num = ++highest_inferior_num;
+  inf->next = inferior_list;
+  inferior_list = inf;
+
+  return inf;
+}
+
+struct inferior *
+add_inferior (int pid)
+{
+  struct inferior *inf = add_inferior_silent (pid);
+
+  if (print_inferior_events)
+    printf_unfiltered (_("[New inferior %d]\n"), pid);
+
+  return inf;
+}
+
+struct delete_thread_of_inferior_arg
+{
+  int pid;
+  int silent;
+};
+
+static int
+delete_thread_of_inferior (struct thread_info *tp, void *data)
+{
+  struct delete_thread_of_inferior_arg *arg = data;
+
+  if (ptid_get_pid (tp->ptid) == arg->pid)
+    {
+      if (arg->silent)
+	delete_thread_silent (tp->ptid);
+      else
+	delete_thread (tp->ptid);
+    }
+
+  return 0;
+}
+
+/* If SILENT then be quiet -- don't announce a inferior death, or the
+   exit of its threads.  */
+static void
+delete_inferior_1 (int pid, int silent)
+{
+  struct inferior *inf, *infprev;
+  struct delete_thread_of_inferior_arg arg = { pid, silent };
+
+  infprev = NULL;
+
+  for (inf = inferior_list; inf; infprev = inf, inf = inf->next)
+    if (inf->pid == pid)
+      break;
+
+  if (!inf)
+    return;
+
+  if (infprev)
+    infprev->next = inf->next;
+  else
+    inferior_list = inf->next;
+
+  free_inferior (inf);
+
+  arg.pid = pid;
+  arg.silent = silent;
+
+  iterate_over_threads (delete_thread_of_inferior, &arg);
+}
+
+void
+delete_inferior (int pid)
+{
+  delete_inferior_1 (pid, 0);
+
+  if (print_inferior_events)
+    printf_unfiltered (_("[Inferior %d exited]\n"), pid);
+}
+
+void
+delete_inferior_silent (int pid)
+{
+  delete_inferior_1 (pid, 1);
+}
+
+void
+detach_inferior (int pid)
+{
+  delete_inferior_1 (pid, 1);
+
+  if (print_inferior_events)
+    printf_unfiltered (_("[Inferior %d detached]\n"), pid);
+}
+
+static struct inferior *
+find_inferior_id (int num)
+{
+  struct inferior *inf;
+
+  for (inf = inferior_list; inf; inf = inf->next)
+    if (inf->num == num)
+      return inf;
+
+  return NULL;
+}
+
+struct inferior *
+find_inferior_pid (int pid)
+{
+  struct inferior *inf;
+
+  for (inf = inferior_list; inf; inf = inf->next)
+    if (inf->pid == pid)
+      return inf;
+
+  return NULL;
+}
+
+struct inferior *
+iterate_over_inferiors (int (*callback) (struct inferior *, void *),
+			void *data)
+{
+  struct inferior *inf, *infnext;
+
+  for (inf = inferior_list; inf; inf = infnext)
+    {
+      infnext = inf->next;
+      if ((*callback) (inf, data))
+	return inf;
+    }
+
+  return NULL;
+}
+
+int
+valid_gdb_inferior_id (int num)
+{
+  struct inferior *inf;
+
+  for (inf = inferior_list; inf; inf = inf->next)
+    if (inf->num == num)
+      return 1;
+
+  return 0;
+}
+
+int
+pid_to_gdb_inferior_id (int pid)
+{
+  struct inferior *inf;
+
+  for (inf = inferior_list; inf; inf = inf->next)
+    if (inf->pid == pid)
+      return inf->num;
+
+  return 0;
+}
+
+int
+gdb_inferior_id_to_pid (int num)
+{
+  struct inferior *inferior = find_inferior_id (num);
+  if (inferior)
+    return inferior->pid;
+  else
+    return -1;
+}
+
+int
+in_inferior_list (int pid)
+{
+  struct inferior *inf;
+
+  for (inf = inferior_list; inf; inf = inf->next)
+    if (inf->pid == pid)
+      return 1;
+
+  return 0;
+}
+
+int
+have_inferiors (void)
+{
+  return inferior_list != NULL;
+}
+
+/* Prints the list of inferiors and their details on UIOUT.  This is a
+   version of 'info_inferior_command' suitable for use from MI.
+
+   If REQUESTED_INFERIOR is not -1, it's the GDB id of the inferior that
+   should be printed.  Otherwise, all inferiors are printed.  */
+void
+print_inferior (struct ui_out *uiout, int requested_inferior)
+{
+  struct inferior *inf;
+  struct cleanup *old_chain;
+
+  old_chain = make_cleanup_ui_out_list_begin_end (uiout, "inferiors");
+
+  for (inf = inferior_list; inf; inf = inf->next)
+    {
+      struct cleanup *chain2;
+
+      if (requested_inferior != -1 && inf->num != requested_inferior)
+	continue;
+
+      chain2 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
+
+      if (inf->pid == ptid_get_pid (inferior_ptid))
+	ui_out_text (uiout, "* ");
+      else
+	ui_out_text (uiout, "  ");
+
+      ui_out_field_int (uiout, "id", inf->num);
+      ui_out_text (uiout, " ");
+      ui_out_field_int (uiout, "target-id", inf->pid);
+
+      ui_out_text (uiout, "\n");
+      do_cleanups (chain2);
+    }
+
+  do_cleanups (old_chain);
+}
+
+/* Print information about currently known inferiors.  */
+
+static void
+info_inferiors_command (char *arg, int from_tty)
+{
+  print_inferior (uiout, -1);
+}
+
+/* Print notices when new inferiors are created and die.  */
+static void
+show_print_inferior_events (struct ui_file *file, int from_tty,
+			   struct cmd_list_element *c, const char *value)
+{
+  fprintf_filtered (file, _("Printing of inferior events is %s.\n"), value);
+}
+
+void
+_initialize_inferiors (void)
+{
+  add_info ("inferiors", info_inferiors_command,
+	    _("IDs of currently known inferiors."));
+
+  add_setshow_boolean_cmd ("inferior-events", no_class,
+         &print_inferior_events, _("\
+Set printing of inferior events (e.g., inferior start and exit)."), _("\
+Show printing of inferior events (e.g., inferior start and exit)."), NULL,
+         NULL,
+         show_print_inferior_events,
+         &setprintlist, &showprintlist);
+}