| /* Language independent support for printing types for GDB, the GNU debugger. |
| Copyright 1986, 88, 89, 91, 92, 93, 1998 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 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 "obstack.h" |
| #include "bfd.h" /* Binary File Description */ |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "expression.h" |
| #include "value.h" |
| #include "gdbcore.h" |
| #include "command.h" |
| #include "gdbcmd.h" |
| #include "target.h" |
| #include "language.h" |
| #include "demangle.h" |
| |
| #include "gdb_string.h" |
| #include <errno.h> |
| |
| /* For real-type printing in whatis_exp() */ |
| extern int objectprint; /* Controls looking up an object's derived type |
| using what we find in its vtables. */ |
| |
| extern void _initialize_typeprint PARAMS ((void)); |
| |
| static void |
| ptype_command PARAMS ((char *, int)); |
| |
| static struct type * |
| ptype_eval PARAMS ((struct expression *)); |
| |
| static void |
| whatis_command PARAMS ((char *, int)); |
| |
| static void |
| whatis_exp PARAMS ((char *, int)); |
| |
| /* Print a description of a type TYPE in the form of a declaration of a |
| variable named VARSTRING. (VARSTRING is demangled if necessary.) |
| Output goes to STREAM (via stdio). |
| If SHOW is positive, we show the contents of the outermost level |
| of structure even if there is a type name that could be used instead. |
| If SHOW is negative, we never show the details of elements' types. */ |
| |
| void |
| type_print (type, varstring, stream, show) |
| struct type *type; |
| char *varstring; |
| GDB_FILE *stream; |
| int show; |
| { |
| LA_PRINT_TYPE (type, varstring, stream, show, 0); |
| } |
| |
| /* Print type of EXP, or last thing in value history if EXP == NULL. |
| show is passed to type_print. */ |
| |
| static void |
| whatis_exp (exp, show) |
| char *exp; |
| int show; |
| { |
| struct expression *expr; |
| register value_ptr val; |
| register struct cleanup *old_chain = NULL; |
| struct type *real_type = NULL; |
| int full = 0; |
| int top = -1; |
| int using_enc = 0; |
| |
| if (exp) |
| { |
| expr = parse_expression (exp); |
| old_chain = make_cleanup ((make_cleanup_func) free_current_contents, |
| &expr); |
| val = evaluate_type (expr); |
| } |
| else |
| val = access_value_history (0); |
| |
| real_type = value_rtti_type (val, &full, &top, &using_enc); |
| |
| printf_filtered ("type = "); |
| |
| if (real_type && objectprint) |
| printf_filtered ("/* real type = %s%s */\n", |
| TYPE_NAME (real_type), |
| full ? "" : " (incomplete object)"); |
| /* FIXME: maybe better to use type_print (real_type, "", gdb_stdout, -1); */ |
| |
| type_print (VALUE_TYPE (val), "", gdb_stdout, show); |
| printf_filtered ("\n"); |
| |
| if (exp) |
| do_cleanups (old_chain); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| whatis_command (exp, from_tty) |
| char *exp; |
| int from_tty; |
| { |
| /* Most of the time users do not want to see all the fields |
| in a structure. If they do they can use the "ptype" command. |
| Hence the "-1" below. */ |
| whatis_exp (exp, -1); |
| } |
| |
| /* Simple subroutine for ptype_command. */ |
| |
| static struct type * |
| ptype_eval (exp) |
| struct expression *exp; |
| { |
| if (exp->elts[0].opcode == OP_TYPE) |
| { |
| return (exp->elts[1].type); |
| } |
| else |
| { |
| return (NULL); |
| } |
| } |
| |
| /* TYPENAME is either the name of a type, or an expression. */ |
| |
| /* ARGSUSED */ |
| static void |
| ptype_command (typename, from_tty) |
| char *typename; |
| int from_tty; |
| { |
| register struct type *type; |
| struct expression *expr; |
| register struct cleanup *old_chain; |
| |
| if (typename == NULL) |
| { |
| /* Print type of last thing in value history. */ |
| whatis_exp (typename, 1); |
| } |
| else |
| { |
| expr = parse_expression (typename); |
| old_chain = make_cleanup ((make_cleanup_func) free_current_contents, |
| &expr); |
| type = ptype_eval (expr); |
| if (type != NULL) |
| { |
| /* User did "ptype <typename>" */ |
| printf_filtered ("type = "); |
| type_print (type, "", gdb_stdout, 1); |
| printf_filtered ("\n"); |
| do_cleanups (old_chain); |
| } |
| else |
| { |
| /* User did "ptype <symbolname>" */ |
| do_cleanups (old_chain); |
| whatis_exp (typename, 1); |
| } |
| } |
| } |
| |
| /* Print integral scalar data VAL, of type TYPE, onto stdio stream STREAM. |
| Used to print data from type structures in a specified type. For example, |
| array bounds may be characters or booleans in some languages, and this |
| allows the ranges to be printed in their "natural" form rather than as |
| decimal integer values. |
| |
| FIXME: This is here simply because only the type printing routines |
| currently use it, and it wasn't clear if it really belonged somewhere |
| else (like printcmd.c). There are a lot of other gdb routines that do |
| something similar, but they are generally concerned with printing values |
| that come from the inferior in target byte order and target size. */ |
| |
| void |
| print_type_scalar (type, val, stream) |
| struct type *type; |
| LONGEST val; |
| GDB_FILE *stream; |
| { |
| unsigned int i; |
| unsigned len; |
| |
| CHECK_TYPEDEF (type); |
| |
| switch (TYPE_CODE (type)) |
| { |
| |
| case TYPE_CODE_ENUM: |
| len = TYPE_NFIELDS (type); |
| for (i = 0; i < len; i++) |
| { |
| if (TYPE_FIELD_BITPOS (type, i) == val) |
| { |
| break; |
| } |
| } |
| if (i < len) |
| { |
| fputs_filtered (TYPE_FIELD_NAME (type, i), stream); |
| } |
| else |
| { |
| print_longest (stream, 'd', 0, val); |
| } |
| break; |
| |
| case TYPE_CODE_INT: |
| print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0, val); |
| break; |
| |
| case TYPE_CODE_CHAR: |
| LA_PRINT_CHAR ((unsigned char) val, stream); |
| break; |
| |
| case TYPE_CODE_BOOL: |
| fprintf_filtered (stream, val ? "TRUE" : "FALSE"); |
| break; |
| |
| case TYPE_CODE_RANGE: |
| print_type_scalar (TYPE_TARGET_TYPE (type), val, stream); |
| return; |
| |
| case TYPE_CODE_UNDEF: |
| case TYPE_CODE_PTR: |
| case TYPE_CODE_ARRAY: |
| case TYPE_CODE_STRUCT: |
| case TYPE_CODE_UNION: |
| case TYPE_CODE_FUNC: |
| case TYPE_CODE_FLT: |
| case TYPE_CODE_VOID: |
| case TYPE_CODE_SET: |
| case TYPE_CODE_STRING: |
| case TYPE_CODE_ERROR: |
| case TYPE_CODE_MEMBER: |
| case TYPE_CODE_METHOD: |
| case TYPE_CODE_REF: |
| error ("internal error: unhandled type in print_type_scalar"); |
| break; |
| |
| default: |
| error ("Invalid type code in symbol table."); |
| } |
| gdb_flush (stream); |
| } |
| |
| /* Dump details of a type specified either directly or indirectly. |
| Uses the same sort of type lookup mechanism as ptype_command() |
| and whatis_command(). */ |
| |
| void |
| maintenance_print_type (typename, from_tty) |
| char *typename; |
| int from_tty; |
| { |
| register value_ptr val; |
| register struct type *type; |
| register struct cleanup *old_chain; |
| struct expression *expr; |
| |
| if (typename != NULL) |
| { |
| expr = parse_expression (typename); |
| old_chain = make_cleanup ((make_cleanup_func) free_current_contents, &expr); |
| if (expr->elts[0].opcode == OP_TYPE) |
| { |
| /* The user expression names a type directly, just use that type. */ |
| type = expr->elts[1].type; |
| } |
| else |
| { |
| /* The user expression may name a type indirectly by naming an |
| object of that type. Find that indirectly named type. */ |
| val = evaluate_type (expr); |
| type = VALUE_TYPE (val); |
| } |
| if (type != NULL) |
| { |
| recursive_dump_type (type, 0); |
| } |
| do_cleanups (old_chain); |
| } |
| } |
| |
| |
| void |
| _initialize_typeprint () |
| { |
| |
| add_com ("ptype", class_vars, ptype_command, |
| "Print definition of type TYPE.\n\ |
| Argument may be a type name defined by typedef, or \"struct STRUCT-TAG\"\n\ |
| or \"class CLASS-NAME\" or \"union UNION-TAG\" or \"enum ENUM-TAG\".\n\ |
| The selected stack frame's lexical context is used to look up the name."); |
| |
| add_com ("whatis", class_vars, whatis_command, |
| "Print data type of expression EXP."); |
| |
| } |