Implement -list-thread-groups.

* thread.c (print_thread_info): New parameter pid, to print
        threads of specific process.
        * gdbthread.h (print_thread_info): New parameter pid.
        * mi/mi-cmds.c (mi_cmds): Register -list-thread-groups.
        * mi/mi-cmds.h (mi_cmd_list_thread_groups): New.
        * mi/mi-main.c (mi_cmd_thread_info): Adjust.
        (print_one_process, mi_cmd_list_thread_groups): New.

gdb/ChangeLog

@@ -1,3 +1,15 @@
+2008-11-17  Vladimir Prus  <vladimir@codesourcery.com>
+
+	Implement -list-thread-groups.
+
+        * thread.c (print_thread_info): New parameter pid, to print
+        threads of specific process.
+        * gdbthread.h (print_thread_info): New parameter pid.
+        * mi/mi-cmds.c (mi_cmds): Register -list-thread-groups.
+        * mi/mi-cmds.h (mi_cmd_list_thread_groups): New.
+        * mi/mi-main.c (mi_cmd_thread_info): Adjust.
+        (print_one_process, mi_cmd_list_thread_groups): New.
+
 2008-11-16  Joel Brobecker  <brobecker@adacore.com>
 
 	Remove some unused macros related to the old load/unload catchpoints.

gdb/gdbthread.h

@@ -295,7 +295,8 @@ extern struct cmd_list_element *thread_cmd_list;
    `set print thread-events'.  */
 extern int print_thread_events;
 
-extern void print_thread_info (struct ui_out *uiout, int thread);
+extern void print_thread_info (struct ui_out *uiout, int thread,
+			       int pid);
 
 extern struct cleanup *make_cleanup_restore_current_thread (void);
 

gdb/mi/mi-cmds.c

@@ -90,6 +90,7 @@ struct mi_cmd mi_cmds[] =
   { "interpreter-exec", { NULL, 0 }, mi_cmd_interpreter_exec},
   { "list-features", { NULL, 0 }, mi_cmd_list_features},
   { "list-target-features", { NULL, 0 }, mi_cmd_list_target_features},
+  { "list-thread-groups", { NULL, 0 }, mi_cmd_list_thread_groups },  
   { "overlay-auto", { NULL, 0 }, NULL },
   { "overlay-list-mapping-state", { NULL, 0 }, NULL },
   { "overlay-list-overlays", { NULL, 0 }, NULL },

gdb/mi/mi-cmds.h

@@ -67,6 +67,7 @@ extern mi_cmd_argv_ftype mi_cmd_inferior_tty_show;
 extern mi_cmd_argv_ftype mi_cmd_interpreter_exec;
 extern mi_cmd_argv_ftype mi_cmd_list_features;
 extern mi_cmd_argv_ftype mi_cmd_list_target_features;
+extern mi_cmd_argv_ftype mi_cmd_list_thread_groups;
 extern mi_cmd_argv_ftype mi_cmd_stack_info_depth;
 extern mi_cmd_argv_ftype mi_cmd_stack_info_frame;
 extern mi_cmd_argv_ftype mi_cmd_stack_list_args;

gdb/mi/mi-main.c

@@ -46,6 +46,7 @@
 #include "mi-main.h"
 #include "language.h"
 #include "valprint.h"
+#include "inferior.h"
 
 #include <ctype.h>
 #include <sys/time.h>
@@ -245,7 +246,55 @@ mi_cmd_thread_info (char *command, char **argv, int argc)
   if (argc == 1)
     thread = atoi (argv[0]);
 
-  print_thread_info (uiout, thread);
+  print_thread_info (uiout, thread, -1);
+}
+
+static int
+print_one_inferior (struct inferior *inferior, void *arg)
+{
+  struct cleanup *back_to = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
+
+  ui_out_field_fmt (uiout, "id", "%d", inferior->pid);
+  ui_out_field_string (uiout, "type", "process");
+  ui_out_field_int (uiout, "pid", inferior->pid);
+  
+  do_cleanups (back_to);
+  return 0;
+}
+
+void
+mi_cmd_list_thread_groups (char *command, char **argv, int argc)
+{
+  struct cleanup *back_to;
+  int available = 0;
+  char *id = NULL;
+
+  if (argc > 0 && strcmp (argv[0], "--available") == 0)
+    {
+      ++argv;
+      --argc;
+      available = 1;
+    }
+
+  if (argc > 0)
+    id = argv[0];
+
+  back_to = make_cleanup (&null_cleanup, NULL);
+
+  if (id)
+    {
+      int pid = atoi (id);
+      if (!in_inferior_list (pid))
+	error ("Invalid thread group id '%s'", id);
+      print_thread_info (uiout, -1, pid);    
+    }
+  else
+    {
+      make_cleanup_ui_out_list_begin_end (uiout, "groups");
+      iterate_over_inferiors (print_one_inferior, NULL);
+    }
+  
+  do_cleanups (back_to);
 }
 
 void

gdb/thread.c

@@ -636,9 +636,14 @@ set_stop_requested (ptid_t ptid, int stop)
    use from MI.  
    If REQUESTED_THREAD is not -1, it's the GDB id of the thread
    that should be printed.  Otherwise, all threads are
-   printed.  */
+   printed.  
+   If PID is not -1, only print threads from the process PID.
+   Otherwise, threads from all attached PIDs are printed.   
+   If both REQUESTED_THREAD and PID are not -1, then the thread
+   is printed if it belongs to the specified process.  Otherwise,
+   an error is raised.  */
 void
-print_thread_info (struct ui_out *uiout, int requested_thread)
+print_thread_info (struct ui_out *uiout, int requested_thread, int pid)
 {
   struct thread_info *tp;
   ptid_t current_ptid;
@@ -661,6 +666,13 @@ print_thread_info (struct ui_out *uiout, int requested_thread)
       if (requested_thread != -1 && tp->num != requested_thread)
 	continue;
 
+      if (pid != -1 && PIDGET (tp->ptid) != pid)
+	{
+	  if (requested_thread != -1)
+	    error (_("Requested thread not found in requested process"));
+	  continue;
+	}
+
       if (ptid_equal (tp->ptid, current_ptid))
 	current_thread = tp->num;
 
@@ -715,7 +727,7 @@ print_thread_info (struct ui_out *uiout, int requested_thread)
      the "info threads" command.  */
   do_cleanups (old_chain);
 
-  if (requested_thread == -1)
+  if (pid == -1 && requested_thread == -1 )
     {
       gdb_assert (current_thread != -1
 		  || !thread_list);
@@ -740,7 +752,7 @@ The current thread <Thread ID %d> has terminated.  See `help thread'.\n",
 static void
 info_threads_command (char *arg, int from_tty)
 {
-  print_thread_info (uiout, -1);
+  print_thread_info (uiout, -1, -1);
 }
 
 /* Switch from one thread to another. */