binutils-gdb/gdb/mi/mi-cmd-var.c

502 lines
13 KiB
C

/* MI Command Set - varobj commands.
Copyright 2000 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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "mi-cmds.h"
#include "ui-out.h"
#include "mi-out.h"
#include "varobj.h"
#include "value.h"
#include <ctype.h>
/* Convenience macro for allocting typesafe memory. */
#undef XMALLOC
#define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
extern int varobjdebug; /* defined in varobj.c */
static int varobj_update_one (struct varobj *var);
/* VAROBJ operations */
enum mi_cmd_result
mi_cmd_var_create (char *command, char **argv, int argc)
{
CORE_ADDR frameaddr = 0;
struct varobj *var;
char *name;
char *frame;
char *expr;
char *type;
struct cleanup *old_cleanups;
enum varobj_type var_type;
if (argc != 3)
{
/* xasprintf (&mi_error_message,
"mi_cmd_var_create: Usage: .");
return MI_CMD_ERROR; */
error ("mi_cmd_var_create: Usage: NAME FRAME EXPRESSION.");
}
name = xstrdup (argv[0]);
/* Add cleanup for name. Must be free_current_contents as
name can be reallocated */
old_cleanups = make_cleanup (free_current_contents, &name);
frame = xstrdup (argv[1]);
old_cleanups = make_cleanup (xfree, frame);
expr = xstrdup (argv[2]);
if (strcmp (name, "-") == 0)
{
xfree (name);
name = varobj_gen_name ();
}
else if (!isalpha (*name))
error ("mi_cmd_var_create: name of object must begin with a letter");
if (strcmp (frame, "*") == 0)
var_type = USE_CURRENT_FRAME;
else if (strcmp (frame, "@") == 0)
var_type = USE_SELECTED_FRAME;
else
{
var_type = USE_SPECIFIED_FRAME;
frameaddr = parse_and_eval_address (frame);
}
if (varobjdebug)
fprintf_unfiltered (gdb_stdlog,
"Name=\"%s\", Frame=\"%s\" (0x%s), Expression=\"%s\"\n",
name, frame, paddr (frameaddr), expr);
var = varobj_create (name, expr, frameaddr, var_type);
if (var == NULL)
error ("mi_cmd_var_create: unable to create variable object");
ui_out_field_string (uiout, "name", name);
ui_out_field_int (uiout, "numchild", varobj_get_num_children (var));
type = varobj_get_type (var);
if (type == NULL)
ui_out_field_string (uiout, "type", "");
else
{
ui_out_field_string (uiout, "type", type);
xfree (type);
}
do_cleanups (old_cleanups);
return MI_CMD_DONE;
}
enum mi_cmd_result
mi_cmd_var_delete (char *command, char **argv, int argc)
{
char *name;
char *expr;
struct varobj *var;
int numdel;
int children_only_p = 0;
struct cleanup *old_cleanups;
if (argc < 1 || argc > 2)
error ("mi_cmd_var_delete: Usage: [-c] EXPRESSION.");
name = xstrdup (argv[0]);
/* Add cleanup for name. Must be free_current_contents as
name can be reallocated */
old_cleanups = make_cleanup (free_current_contents, &name);
/* If we have one single argument it cannot be '-c' or any string
starting with '-'. */
if (argc == 1)
{
if (strcmp (name, "-c") == 0)
error ("mi_cmd_var_delete: Missing required argument after '-c': variable object name");
if (*name == '-')
error ("mi_cmd_var_delete: Illegal variable object name");
}
/* If we have 2 arguments they must be '-c' followed by a string
which would be the variable name. */
if (argc == 2)
{
expr = xstrdup (argv[1]);
if (strcmp (name, "-c") != 0)
error ("mi_cmd_var_delete: Invalid option.");
children_only_p = 1;
xfree (name);
name = xstrdup (expr);
xfree (expr);
}
/* If we didn't error out, now NAME contains the name of the
variable. */
var = varobj_get_handle (name);
if (var == NULL)
error ("mi_cmd_var_delete: Variable object not found.");
numdel = varobj_delete (var, NULL, children_only_p);
ui_out_field_int (uiout, "ndeleted", numdel);
do_cleanups (old_cleanups);
return MI_CMD_DONE;
}
enum mi_cmd_result
mi_cmd_var_set_format (char *command, char **argv, int argc)
{
enum varobj_display_formats format;
int len;
struct varobj *var;
char *formspec;
if (argc != 2)
error ("mi_cmd_var_set_format: Usage: NAME FORMAT.");
/* Get varobj handle, if a valid var obj name was specified */
var = varobj_get_handle (argv[0]);
if (var == NULL)
error ("mi_cmd_var_set_format: Variable object not found");
formspec = xstrdup (argv[1]);
if (formspec == NULL)
error ("mi_cmd_var_set_format: Must specify the format as: \"natural\", \"binary\", \"decimal\", \"hexadecimal\", or \"octal\"");
len = strlen (formspec);
if (STREQN (formspec, "natural", len))
format = FORMAT_NATURAL;
else if (STREQN (formspec, "binary", len))
format = FORMAT_BINARY;
else if (STREQN (formspec, "decimal", len))
format = FORMAT_DECIMAL;
else if (STREQN (formspec, "hexadecimal", len))
format = FORMAT_HEXADECIMAL;
else if (STREQN (formspec, "octal", len))
format = FORMAT_OCTAL;
else
error ("mi_cmd_var_set_format: Unknown display format: must be: \"natural\", \"binary\", \"decimal\", \"hexadecimal\", or \"octal\"");
/* Set the format of VAR to given format */
varobj_set_display_format (var, format);
/* Report the new current format */
ui_out_field_string (uiout, "format", varobj_format_string[(int) format]);
return MI_CMD_DONE;
}
enum mi_cmd_result
mi_cmd_var_show_format (char *command, char **argv, int argc)
{
enum varobj_display_formats format;
struct varobj *var;
if (argc != 1)
error ("mi_cmd_var_show_format: Usage: NAME.");
/* Get varobj handle, if a valid var obj name was specified */
var = varobj_get_handle (argv[0]);
if (var == NULL)
error ("mi_cmd_var_show_format: Variable object not found");
format = varobj_get_display_format (var);
/* Report the current format */
ui_out_field_string (uiout, "format", varobj_format_string[(int) format]);
return MI_CMD_DONE;
}
enum mi_cmd_result
mi_cmd_var_info_num_children (char *command, char **argv, int argc)
{
struct varobj *var;
if (argc != 1)
error ("mi_cmd_var_info_num_children: Usage: NAME.");
/* Get varobj handle, if a valid var obj name was specified */
var = varobj_get_handle (argv[0]);
if (var == NULL)
error ("mi_cmd_var_info_num_children: Variable object not found");
ui_out_field_int (uiout, "numchild", varobj_get_num_children (var));
return MI_CMD_DONE;
}
enum mi_cmd_result
mi_cmd_var_list_children (char *command, char **argv, int argc)
{
struct varobj *var;
struct varobj **childlist;
struct varobj **cc;
int numchild;
char *type;
if (argc != 1)
error ("mi_cmd_var_list_children: Usage: NAME.");
/* Get varobj handle, if a valid var obj name was specified */
var = varobj_get_handle (argv[0]);
if (var == NULL)
error ("mi_cmd_var_list_children: Variable object not found");
numchild = varobj_list_children (var, &childlist);
ui_out_field_int (uiout, "numchild", numchild);
if (numchild <= 0)
return MI_CMD_DONE;
ui_out_tuple_begin (uiout, "children");
cc = childlist;
while (*cc != NULL)
{
ui_out_tuple_begin (uiout, "child");
ui_out_field_string (uiout, "name", varobj_get_objname (*cc));
ui_out_field_string (uiout, "exp", varobj_get_expression (*cc));
ui_out_field_int (uiout, "numchild", varobj_get_num_children (*cc));
type = varobj_get_type (*cc);
/* C++ pseudo-variables (public, private, protected) do not have a type */
if (type)
ui_out_field_string (uiout, "type", varobj_get_type (*cc));
ui_out_tuple_end (uiout);
cc++;
}
ui_out_tuple_end (uiout);
xfree (childlist);
return MI_CMD_DONE;
}
enum mi_cmd_result
mi_cmd_var_info_type (char *command, char **argv, int argc)
{
struct varobj *var;
if (argc != 1)
error ("mi_cmd_var_info_type: Usage: NAME.");
/* Get varobj handle, if a valid var obj name was specified */
var = varobj_get_handle (argv[0]);
if (var == NULL)
error ("mi_cmd_var_info_type: Variable object not found");
ui_out_field_string (uiout, "type", varobj_get_type (var));
return MI_CMD_DONE;
}
enum mi_cmd_result
mi_cmd_var_info_expression (char *command, char **argv, int argc)
{
enum varobj_languages lang;
struct varobj *var;
if (argc != 1)
error ("mi_cmd_var_info_expression: Usage: NAME.");
/* Get varobj handle, if a valid var obj name was specified */
var = varobj_get_handle (argv[0]);
if (var == NULL)
error ("mi_cmd_var_info_expression: Variable object not found");
lang = varobj_get_language (var);
ui_out_field_string (uiout, "lang", varobj_language_string[(int) lang]);
ui_out_field_string (uiout, "exp", varobj_get_expression (var));
return MI_CMD_DONE;
}
enum mi_cmd_result
mi_cmd_var_show_attributes (char *command, char **argv, int argc)
{
int attr;
char *attstr;
struct varobj *var;
if (argc != 1)
error ("mi_cmd_var_show_attributes: Usage: NAME.");
/* Get varobj handle, if a valid var obj name was specified */
var = varobj_get_handle (argv[0]);
if (var == NULL)
error ("mi_cmd_var_show_attributes: Variable object not found");
attr = varobj_get_attributes (var);
/* FIXME: define masks for attributes */
if (attr & 0x00000001)
attstr = "editable";
else
attstr = "noneditable";
ui_out_field_string (uiout, "attr", attstr);
return MI_CMD_DONE;
}
enum mi_cmd_result
mi_cmd_var_evaluate_expression (char *command, char **argv, int argc)
{
struct varobj *var;
if (argc != 1)
error ("mi_cmd_var_evaluate_expression: Usage: NAME.");
/* Get varobj handle, if a valid var obj name was specified */
var = varobj_get_handle (argv[0]);
if (var == NULL)
error ("mi_cmd_var_evaluate_expression: Variable object not found");
ui_out_field_string (uiout, "value", varobj_get_value (var));
return MI_CMD_DONE;
}
enum mi_cmd_result
mi_cmd_var_assign (char *command, char **argv, int argc)
{
struct varobj *var;
char *expression;
if (argc != 2)
error ("mi_cmd_var_assign: Usage: NAME EXPRESSION.");
/* Get varobj handle, if a valid var obj name was specified */
var = varobj_get_handle (argv[0]);
if (var == NULL)
error ("mi_cmd_var_assign: Variable object not found");
/* FIXME: define masks for attributes */
if (!(varobj_get_attributes (var) & 0x00000001))
error ("mi_cmd_var_assign: Variable object is not editable");
expression = xstrdup (argv[1]);
if (!varobj_set_value (var, expression))
error ("mi_cmd_var_assign: Could not assign expression to varible object");
ui_out_field_string (uiout, "value", varobj_get_value (var));
return MI_CMD_DONE;
}
enum mi_cmd_result
mi_cmd_var_update (char *command, char **argv, int argc)
{
struct varobj *var;
struct varobj **rootlist;
struct varobj **cr;
char *name;
int nv;
if (argc != 1)
error ("mi_cmd_var_update: Usage: NAME.");
name = argv[0];
/* Check if the parameter is a "*" which means that we want
to update all variables */
if ((*name == '*') && (*(name + 1) == '\0'))
{
nv = varobj_list (&rootlist);
ui_out_tuple_begin (uiout, "changelist");
if (nv <= 0)
{
ui_out_tuple_end (uiout);
return MI_CMD_DONE;
}
cr = rootlist;
while (*cr != NULL)
{
varobj_update_one (*cr);
cr++;
}
xfree (rootlist);
ui_out_tuple_end (uiout);
}
else
{
/* Get varobj handle, if a valid var obj name was specified */
var = varobj_get_handle (name);
if (var == NULL)
error ("mi_cmd_var_update: Variable object not found");
ui_out_tuple_begin (uiout, "changelist");
varobj_update_one (var);
ui_out_tuple_end (uiout);
}
return MI_CMD_DONE;
}
/* Helper for mi_cmd_var_update() Returns 0 if the update for
the variable fails (usually because the variable is out of
scope), and 1 if it succeeds. */
static int
varobj_update_one (struct varobj *var)
{
struct varobj **changelist;
struct varobj **cc;
int nc;
nc = varobj_update (var, &changelist);
/* nc == 0 means that nothing has changed.
nc == -1 means that an error occured in updating the variable.
nc == -2 means the variable has changed type. */
if (nc == 0)
return 1;
else if (nc == -1)
{
ui_out_field_string (uiout, "name", varobj_get_objname(var));
ui_out_field_string (uiout, "in_scope", "false");
return -1;
}
else if (nc == -2)
{
ui_out_field_string (uiout, "name", varobj_get_objname (var));
ui_out_field_string (uiout, "in_scope", "true");
ui_out_field_string (uiout, "new_type", varobj_get_type(var));
ui_out_field_int (uiout, "new_num_children",
varobj_get_num_children(var));
}
else
{
cc = changelist;
while (*cc != NULL)
{
ui_out_field_string (uiout, "name", varobj_get_objname (*cc));
ui_out_field_string (uiout, "in_scope", "true");
ui_out_field_string (uiout, "type_changed", "false");
cc++;
}
xfree (changelist);
return 1;
}
return 1;
}