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/* MI Command Set - stack commands.

   Copyright (C) 2000, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010

   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 "target.h"

#include "frame.h"

#include "value.h"

#include "mi-cmds.h"

#include "ui-out.h"

#include "symtab.h"

#include "block.h"

#include "stack.h"

#include "dictionary.h"

#include "gdb_string.h"

#include "language.h"

#include "valprint.h"

enum what_to_list { locals, arguments, all };

static void list_args_or_locals (enum what_to_list what,

                                 int values, struct frame_info *fi);

/* Print a list of the stack frames. Args can be none, in which case

   we want to print the whole backtrace, or a pair of numbers

   specifying the frame numbers at which to start and stop the

   display. If the two numbers are equal, a single frame will be

   displayed. */

void

mi_cmd_stack_list_frames (char *command, char **argv, int argc)

{

  int frame_low;

  int frame_high;

  int i;

  struct cleanup *cleanup_stack;

  struct frame_info *fi;

  if (argc > 2 || argc == 1)

    error (_("mi_cmd_stack_list_frames: Usage: [FRAME_LOW FRAME_HIGH]"));

  if (argc == 2)

    {

      frame_low = atoi (argv[0]);

      frame_high = atoi (argv[1]);

    }

  else

    {

      /* Called with no arguments, it means we want the whole

         backtrace. */

      frame_low = -1;

      frame_high = -1;

    }

  /* Let's position fi on the frame at which to start the

     display. Could be the innermost frame if the whole stack needs

     displaying, or if frame_low is 0. */

  for (i = 0, fi = get_current_frame ();

       fi && i < frame_low;

       i++, fi = get_prev_frame (fi));

  if (fi == NULL)

    error (_("mi_cmd_stack_list_frames: Not enough frames in stack."));

  cleanup_stack = make_cleanup_ui_out_list_begin_end (uiout, "stack");

  /* Now let;s print the frames up to frame_high, or until there are

     frames in the stack. */

  for (;

       fi && (i <= frame_high || frame_high == -1);

       i++, fi = get_prev_frame (fi))

    {

      QUIT;

      /* Print the location and the address always, even for level 0.

         args == 0: don't print the arguments. */

      print_frame_info (fi, 1, LOC_AND_ADDRESS, 0 /* args */ );

    }

  do_cleanups (cleanup_stack);

}

void

mi_cmd_stack_info_depth (char *command, char **argv, int argc)

{

  int frame_high;

  int i;

  struct frame_info *fi;

  if (argc > 1)

    error (_("mi_cmd_stack_info_depth: Usage: [MAX_DEPTH]"));

  if (argc == 1)

    frame_high = atoi (argv[0]);

  else

    /* Called with no arguments, it means we want the real depth of

       the stack. */

    frame_high = -1;

  for (i = 0, fi = get_current_frame ();

       fi && (i < frame_high || frame_high == -1);

       i++, fi = get_prev_frame (fi))

    QUIT;

  ui_out_field_int (uiout, "depth", i);

}

static enum print_values

parse_print_values (char *name)

{

   if (strcmp (name, "0") == 0

       || strcmp (name, mi_no_values) == 0)

     return PRINT_NO_VALUES;

   else if (strcmp (name, "1") == 0

            || strcmp (name, mi_all_values) == 0)

     return PRINT_ALL_VALUES;

   else if (strcmp (name, "2") == 0

            || strcmp (name, mi_simple_values) == 0)

     return PRINT_SIMPLE_VALUES;

   else

     error (_("Unknown value for PRINT_VALUES: must be: \

            mi_no_values, mi_all_values, mi_simple_values);

}

/* Print a list of the locals for the current frame.  With argument of

   0, print only the names, with argument of 1 print also the

   values. */

void

mi_cmd_stack_list_locals (char *command, char **argv, int argc)

{

  struct frame_info *frame;

  if (argc != 1)

    error (_("mi_cmd_stack_list_locals: Usage: PRINT_VALUES"));

   frame = get_selected_frame (NULL);

   list_args_or_locals (locals, parse_print_values (argv[0]), frame);

}

/* Print a list of the arguments for the current frame.  With argument

   of 0, print only the names, with argument of 1 print also the

   values. */

void

mi_cmd_stack_list_args (char *command, char **argv, int argc)

{

  int frame_low;

  int frame_high;

  int i;

  struct frame_info *fi;

  struct cleanup *cleanup_stack_args;

  enum print_values print_values;

  if (argc < 1 || argc > 3 || argc == 2)

    error (_("mi_cmd_stack_list_args: Usage: PRINT_VALUES [FRAME_LOW FRAME_HIGH]"));

  if (argc == 3)

    {

      frame_low = atoi (argv[1]);

      frame_high = atoi (argv[2]);

    }

  else

    {

      /* Called with no arguments, it means we want args for the whole

         backtrace. */

      frame_low = -1;

      frame_high = -1;

    }

  print_values = parse_print_values (argv[0]);

  /* Let's position fi on the frame at which to start the

     display. Could be the innermost frame if the whole stack needs

     displaying, or if frame_low is 0. */

  for (i = 0, fi = get_current_frame ();

       fi && i < frame_low;

       i++, fi = get_prev_frame (fi));

  if (fi == NULL)

    error (_("mi_cmd_stack_list_args: Not enough frames in stack."));

  cleanup_stack_args = make_cleanup_ui_out_list_begin_end (uiout, "stack-args");

  /* Now let's print the frames up to frame_high, or until there are

     frames in the stack. */

  for (;

       fi && (i <= frame_high || frame_high == -1);

       i++, fi = get_prev_frame (fi))

    {

      struct cleanup *cleanup_frame;

      QUIT;

      cleanup_frame = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");

      ui_out_field_int (uiout, "level", i);

      list_args_or_locals (arguments, print_values, fi);

      do_cleanups (cleanup_frame);

    }

  do_cleanups (cleanup_stack_args);

}

/* Print a list of the local variables (including arguments) for the

   current frame.  ARGC must be 1 and ARGV[0] specify if only the names,

   or both names and values of the variables must be printed.  See

   parse_print_value for possible values.  */

void

mi_cmd_stack_list_variables (char *command, char **argv, int argc)

{

  struct frame_info *frame;

  if (argc != 1)

    error (_("Usage: PRINT_VALUES"));

  frame = get_selected_frame (NULL);

  list_args_or_locals (all, parse_print_values (argv[0]), frame);

}

/* Print a list of the locals or the arguments for the currently

   selected frame.  If the argument passed is 0, printonly the names

   of the variables, if an argument of 1 is passed, print the values

   as well. */

static void

list_args_or_locals (enum what_to_list what, int values, struct frame_info *fi)

{

  struct block *block;

  struct symbol *sym;

  struct dict_iterator iter;

  struct cleanup *cleanup_list;

  static struct ui_stream *stb = NULL;

  struct type *type;

  char *name_of_result;

  stb = ui_out_stream_new (uiout);

  block = get_frame_block (fi, 0);

  switch (what)

    {

    case locals:

      name_of_result = "locals";

      break;

    case arguments:

      name_of_result = "args";

      break;

    case all:

      name_of_result = "variables";

      break;

    default:

      internal_error (__FILE__, __LINE__,

                      "unexpected what_to_list: %d", (int) what);

    }

  cleanup_list = make_cleanup_ui_out_list_begin_end (uiout, name_of_result);

  while (block != 0)

    {

      ALL_BLOCK_SYMBOLS (block, iter, sym)

        {

          int print_me = 0;

          switch (SYMBOL_CLASS (sym))

            {

            default:

            case LOC_UNDEF:     /* catches errors        */

            case LOC_CONST:     /* constant              */

            case LOC_TYPEDEF:   /* local typedef         */

            case LOC_LABEL:     /* local label           */

            case LOC_BLOCK:     /* local function        */

            case LOC_CONST_BYTES:       /* loc. byte seq.        */

            case LOC_UNRESOLVED:        /* unresolved static     */

            case LOC_OPTIMIZED_OUT:     /* optimized out         */

              print_me = 0;

              break;

            case LOC_ARG:       /* argument              */

            case LOC_REF_ARG:   /* reference arg         */

            case LOC_REGPARM_ADDR:      /* indirect register arg */

            case LOC_LOCAL:     /* stack local           */

            case LOC_STATIC:    /* static                */

            case LOC_REGISTER:  /* register              */

            case LOC_COMPUTED:  /* computed location     */

              if (what == all)

                print_me = 1;

              else if (what == locals)

                print_me = !SYMBOL_IS_ARGUMENT (sym);

              else

                print_me = SYMBOL_IS_ARGUMENT (sym);

              break;

            }

          if (print_me)

            {

              struct cleanup *cleanup_tuple = NULL;

              struct symbol *sym2;

              struct value *val;

              if (values != PRINT_NO_VALUES || what == all)

                cleanup_tuple =

                  make_cleanup_ui_out_tuple_begin_end (uiout, NULL);

              ui_out_field_string (uiout, "name", SYMBOL_PRINT_NAME (sym));

              if (what == all && SYMBOL_IS_ARGUMENT (sym))

                ui_out_field_int (uiout, "arg", 1);

              if (SYMBOL_IS_ARGUMENT (sym))

                sym2 = lookup_symbol (SYMBOL_NATURAL_NAME (sym),

                                      block, VAR_DOMAIN,

                                      (int *) NULL);

              else

                sym2 = sym;

              switch (values)

                {

                case PRINT_SIMPLE_VALUES:

                  type = check_typedef (sym2->type);

                  type_print (sym2->type, "", stb->stream, -1);

                  ui_out_field_stream (uiout, "type", stb);

                  if (TYPE_CODE (type) != TYPE_CODE_ARRAY

                      && TYPE_CODE (type) != TYPE_CODE_STRUCT

                      && TYPE_CODE (type) != TYPE_CODE_UNION)

                    {

                      struct value_print_options opts;

                      val = read_var_value (sym2, fi);

                      get_raw_print_options (&opts);

                      opts.deref_ref = 1;

                      common_val_print

                        (val, stb->stream, 0, &opts,

                         language_def (SYMBOL_LANGUAGE (sym2)));

                      ui_out_field_stream (uiout, "value", stb);

                    }

                  break;

                case PRINT_ALL_VALUES:

                  {

                    struct value_print_options opts;

                    val = read_var_value (sym2, fi);

                    get_raw_print_options (&opts);

                    opts.deref_ref = 1;

                    common_val_print

                      (val, stb->stream, 0, &opts,

                       language_def (SYMBOL_LANGUAGE (sym2)));

                    ui_out_field_stream (uiout, "value", stb);

                  }

                  break;

                }

              if (values != PRINT_NO_VALUES || what == all)

                do_cleanups (cleanup_tuple);

            }

        }

      if (BLOCK_FUNCTION (block))

        break;

      else

        block = BLOCK_SUPERBLOCK (block);

    }

  do_cleanups (cleanup_list);

  ui_out_stream_delete (stb);

}

void

mi_cmd_stack_select_frame (char *command, char **argv, int argc)

{

  if (argc == 0 || argc > 1)

    error (_("mi_cmd_stack_select_frame: Usage: FRAME_SPEC"));

  select_frame_command (argv[0], 1 /* not used */ );

}

void

mi_cmd_stack_info_frame (char *command, char **argv, int argc)

{

  if (argc > 0)

    error (_("mi_cmd_stack_info_frame: No arguments required"));

  print_frame_info (get_selected_frame (NULL), 1, LOC_AND_ADDRESS, 0);

}