Merge GDB 7.5.1

gdb/mi/mi-cmds.c

 /* MI Command Set for GDB, the GNU debugger.
-
    Copyright (C) 2000-2001, 2003, 2007-2012 Free Software Foundation,
    Inc.
 
    Contributed by Cygnus Solutions (a Red Hat company).
 
    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 "top.h"
 #include "mi-cmds.h"
 #include "gdb_string.h"
 
 extern void _initialize_mi_cmds (void);
+
 struct mi_cmd;
 static struct mi_cmd **lookup_table (const char *command);
 static void build_table (struct mi_cmd *commands);
 
-
 struct mi_cmd mi_cmds[] =
 {
   { "ada-task-info", { NULL, 0 }, mi_cmd_ada_task_info },
   { "add-inferior", { NULL, 0 }, mi_cmd_add_inferior },
   { "break-after", { "ignore", 1 }, NULL },
   { "break-condition", { "cond", 1 }, NULL },
   { "break-commands", { NULL, 0 }, mi_cmd_break_commands },
   { "break-delete", { "delete breakpoint", 1 }, NULL },
   { "break-disable", { "disable breakpoint", 1 }, NULL },
   { "break-enable", { "enable breakpoint", 1 }, NULL },
@@ skipping 39 matching lines @@
     mi_cmd_file_list_exec_source_file},
   { "file-list-exec-source-files", { NULL, 0 },
     mi_cmd_file_list_exec_source_files },
   { "file-symbol-file", { "symbol-file", 1 }, NULL },
   { "gdb-exit", { NULL, 0 }, mi_cmd_gdb_exit},
   { "gdb-set", { "set", 1 }, NULL },
   { "gdb-show", { "show", 1 }, NULL },
   { "gdb-version", { "show version", 0 }, 0 },
   { "inferior-tty-set", { NULL, 0 }, mi_cmd_inferior_tty_set},
   { "inferior-tty-show", { NULL, 0 }, mi_cmd_inferior_tty_show},
+  { "info-os", { NULL, 0 }, mi_cmd_info_os},
   { "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 },  
   { "remove-inferior", { NULL, 0 }, mi_cmd_remove_inferior },
   { "stack-info-depth", { NULL, 0 }, mi_cmd_stack_info_depth},
   { "stack-info-frame", { NULL, 0 }, mi_cmd_stack_info_frame},
   { "stack-list-arguments", { NULL, 0 }, mi_cmd_stack_list_args},
   { "stack-list-frames", { NULL, 0 }, mi_cmd_stack_list_frames},
   { "stack-list-locals", { NULL, 0 }, mi_cmd_stack_list_locals},
@@ skipping 30 matching lines @@
   { "var-set-format", { NULL, 0 }, mi_cmd_var_set_format},
   { "var-set-frozen", { NULL, 0 }, mi_cmd_var_set_frozen},
   { "var-set-update-range", { NULL, 0 }, mi_cmd_var_set_update_range },
   { "var-set-visualizer", { NULL, 0 }, mi_cmd_var_set_visualizer},
   { "var-show-attributes", { NULL, 0 }, mi_cmd_var_show_attributes},
   { "var-show-format", { NULL, 0 }, mi_cmd_var_show_format},
   { "var-update", { NULL, 0 }, mi_cmd_var_update},
   { NULL, }
 };
 
-/* Pointer to the mi command table (built at run time) */
+/* Pointer to the mi command table (built at run time). */
 
 static struct mi_cmd **mi_table;
 
-/* A prime large enough to accomodate the entire command table */
+/* A prime large enough to accomodate the entire command table.  */
 enum
   {
     MI_TABLE_SIZE = 227
   };
 
-/* Exported function used to obtain info from the table */
+/* Exported function used to obtain info from the table.  */
 struct mi_cmd *
 mi_lookup (const char *command)
 {
   return *lookup_table (command);
 }
 
-/* stat collecting */
+/* Used for collecting hash hit/miss statistics.  */
+
 struct mi_cmd_stats
 {
   int hit;
   int miss;
   int rehash;
 };
 struct mi_cmd_stats stats;
 
-/* our lookup function */
+/* Look up a command.  */
+
 static struct mi_cmd **
 lookup_table (const char *command)
 {
   const char *chp;
   unsigned int index = 0;
 
-  /* compute our hash */
+  /* Compute our hash.  */
   for (chp = command; *chp; chp++)
     {
-      /* some what arbitrary */
+      /* We use a somewhat arbitrary formula.  */
       index = ((index << 6) + (unsigned int) *chp) % MI_TABLE_SIZE;
     }
-  /* look it up */
+
   while (1)
     {
       struct mi_cmd **entry = &mi_table[index];
       if ((*entry) == 0)
         {
           /* not found, return pointer to next free. */
           stats.miss++;
           return entry;
         }
       if (strcmp (command, (*entry)->name) == 0)
@@ skipping 18 matching lines @@
   memset (mi_table, 0, sizeof_table);
   for (command = commands; command->name != 0; command++)
     {
       struct mi_cmd **entry = lookup_table (command->name);
 
       if (*entry)
         internal_error (__FILE__, __LINE__,
                         _("command `%s' appears to be duplicated"),
                         command->name);
       *entry = command;
+      /* FIXME lose these prints */
       if (0)
         {
           fprintf_unfiltered (gdb_stdlog, "%-30s %2d\n",
                               command->name, stats.rehash - nr_rehash);
         }
       nr_entries++;
       nr_rehash = stats.rehash;
     }
   if (0)
     {
       fprintf_filtered (gdb_stdlog, "Average %3.1f\n",
                         (double) nr_rehash / (double) nr_entries);
     }
 }
 
 void
 _initialize_mi_cmds (void)
 {
   build_table (mi_cmds);
   memset (&stats, 0, sizeof (stats));
 }