ea37ba0926
* c-valprint.c (textual_element_type): New. (c_val_print): Use it. Do not skip address printing for pointers with a string format. (c_value_print): Doc update. * dwarf2read.c (read_array_type): Use make_vector_type. * gdbtypes.c (make_vector_type): New. (init_vector_type): Use it. (gdbtypes_post_init): Initialize builtin_true_unsigned_char. (_initialize_gdbtypes): Mark int8_t and uint8_t as TYPE_FLAG_NOTTEXT. * gdbtypes.h (struct builtin_type): Add builtin_true_unsigned_char. (TYPE_FLAG_NOTTEXT, TYPE_NOTTEXT): New. (make_vector_type): New. * printcmd.c (print_formatted): Only handle 's' and 'i' for examine. Call the language print routine for string format. (print_scalar_formatted): Call val_print for string format. Handle unsigned original types for char format. (validate_format): Do not reject string format. * stabsread.c (read_type): Use make_vector_type. * xml-tdesc.c (tdesc_start_vector): Use init_vector_type. * gdb.texinfo (Output Formats): Update 'c' description. Describe 's'. (Examining Memory): Update mentions of the 's' format. (Automatic Display): Likewise. * gdb.arch/i386-sse.exp: Do not expect character constants. * gdb.base/charsign.c, gdb.base/charsign.exp: Delete. * gdb.base/display.exp: Allow print/s. * gdb.base/printcmds.exp, gdb.base/setvar.exp: Revert signed and unsigned char array changes.
636 lines
19 KiB
C
636 lines
19 KiB
C
/* Support for printing C values for GDB, the GNU debugger.
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Copyright (C) 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
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1998, 1999, 2000, 2001, 2003, 2005, 2006, 2007
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdb_string.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "value.h"
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#include "valprint.h"
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#include "language.h"
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#include "c-lang.h"
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#include "cp-abi.h"
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#include "target.h"
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/* Print function pointer with inferior address ADDRESS onto stdio
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stream STREAM. */
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static void
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print_function_pointer_address (CORE_ADDR address, struct ui_file *stream)
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{
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CORE_ADDR func_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
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address,
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¤t_target);
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/* If the function pointer is represented by a description, print the
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address of the description. */
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if (addressprint && func_addr != address)
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{
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fputs_filtered ("@", stream);
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deprecated_print_address_numeric (address, 1, stream);
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fputs_filtered (": ", stream);
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}
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print_address_demangle (func_addr, stream, demangle);
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}
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/* Apply a heuristic to decide whether an array of TYPE or a pointer
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to TYPE should be printed as a textual string. Return non-zero if
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it should, or zero if it should be treated as an array of integers
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or pointer to integers. FORMAT is the current format letter,
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or 0 if none.
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We guess that "char" is a character. Explicitly signed and
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unsigned character types are also characters. Integer data from
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vector types is not. The user can override this by using the /s
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format letter. */
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static int
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textual_element_type (struct type *type, char format)
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{
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struct type *true_type = check_typedef (type);
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if (format != 0 && format != 's')
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return 0;
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/* TYPE_CODE_CHAR is always textual. */
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if (TYPE_CODE (true_type) == TYPE_CODE_CHAR)
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return 1;
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if (format == 's')
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{
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/* Print this as a string if we can manage it. For now, no
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wide character support. */
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if (TYPE_CODE (true_type) == TYPE_CODE_INT
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&& TYPE_LENGTH (true_type) == 1)
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return 1;
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}
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else
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{
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/* If a one-byte TYPE_CODE_INT is missing the not-a-character
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flag, then we treat it as text; otherwise, we assume it's
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being used as data. */
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if (TYPE_CODE (true_type) == TYPE_CODE_INT
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&& TYPE_LENGTH (true_type) == 1
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&& !TYPE_NOTTEXT (true_type))
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return 1;
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}
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return 0;
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}
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/* Print data of type TYPE located at VALADDR (within GDB), which came from
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the inferior at address ADDRESS, onto stdio stream STREAM according to
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FORMAT (a letter or 0 for natural format). The data at VALADDR is in
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target byte order.
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If the data are a string pointer, returns the number of string characters
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printed.
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If DEREF_REF is nonzero, then dereference references, otherwise just print
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them like pointers.
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The PRETTY parameter controls prettyprinting. */
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int
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c_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
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CORE_ADDR address, struct ui_file *stream, int format,
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int deref_ref, int recurse, enum val_prettyprint pretty)
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{
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unsigned int i = 0; /* Number of characters printed */
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unsigned len;
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struct type *elttype;
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unsigned eltlen;
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LONGEST val;
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CORE_ADDR addr;
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CHECK_TYPEDEF (type);
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_ARRAY:
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elttype = check_typedef (TYPE_TARGET_TYPE (type));
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if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
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{
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eltlen = TYPE_LENGTH (elttype);
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len = TYPE_LENGTH (type) / eltlen;
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if (prettyprint_arrays)
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{
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print_spaces_filtered (2 + 2 * recurse, stream);
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}
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/* Print arrays of textual chars with a string syntax. */
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if (textual_element_type (elttype, format))
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{
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/* If requested, look for the first null char and only print
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elements up to it. */
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if (stop_print_at_null)
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{
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unsigned int temp_len;
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/* Look for a NULL char. */
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for (temp_len = 0;
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(valaddr + embedded_offset)[temp_len]
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&& temp_len < len && temp_len < print_max;
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temp_len++);
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len = temp_len;
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}
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LA_PRINT_STRING (stream, valaddr + embedded_offset, len, eltlen, 0);
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i = len;
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}
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else
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{
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fprintf_filtered (stream, "{");
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/* If this is a virtual function table, print the 0th
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entry specially, and the rest of the members normally. */
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if (cp_is_vtbl_ptr_type (elttype))
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{
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i = 1;
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fprintf_filtered (stream, _("%d vtable entries"), len - 1);
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}
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else
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{
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i = 0;
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}
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val_print_array_elements (type, valaddr + embedded_offset, address, stream,
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format, deref_ref, recurse, pretty, i);
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fprintf_filtered (stream, "}");
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}
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break;
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}
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/* Array of unspecified length: treat like pointer to first elt. */
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addr = address;
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goto print_unpacked_pointer;
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case TYPE_CODE_MEMBERPTR:
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if (format)
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{
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print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream);
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break;
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}
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cp_print_class_member (valaddr + embedded_offset,
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TYPE_DOMAIN_TYPE (type),
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stream, "&");
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break;
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case TYPE_CODE_METHODPTR:
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cplus_print_method_ptr (valaddr + embedded_offset, type, stream);
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break;
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case TYPE_CODE_PTR:
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if (format && format != 's')
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{
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print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream);
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break;
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}
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if (vtblprint && cp_is_vtbl_ptr_type (type))
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{
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/* Print the unmangled name if desired. */
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/* Print vtable entry - we only get here if we ARE using
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-fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
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CORE_ADDR addr
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= extract_typed_address (valaddr + embedded_offset, type);
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print_function_pointer_address (addr, stream);
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break;
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}
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elttype = check_typedef (TYPE_TARGET_TYPE (type));
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{
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addr = unpack_pointer (type, valaddr + embedded_offset);
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print_unpacked_pointer:
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if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
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{
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/* Try to print what function it points to. */
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print_function_pointer_address (addr, stream);
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/* Return value is irrelevant except for string pointers. */
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return (0);
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}
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if (addressprint)
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{
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deprecated_print_address_numeric (addr, 1, stream);
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}
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/* For a pointer to a textual type, also print the string
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pointed to, unless pointer is null. */
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/* FIXME: need to handle wchar_t here... */
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if (textual_element_type (elttype, format) && addr != 0)
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{
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i = val_print_string (addr, -1, TYPE_LENGTH (elttype), stream);
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}
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else if (cp_is_vtbl_member (type))
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{
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/* print vtbl's nicely */
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CORE_ADDR vt_address = unpack_pointer (type, valaddr + embedded_offset);
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struct minimal_symbol *msymbol =
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lookup_minimal_symbol_by_pc (vt_address);
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if ((msymbol != NULL) &&
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(vt_address == SYMBOL_VALUE_ADDRESS (msymbol)))
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{
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fputs_filtered (" <", stream);
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fputs_filtered (SYMBOL_PRINT_NAME (msymbol), stream);
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fputs_filtered (">", stream);
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}
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if (vt_address && vtblprint)
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{
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struct value *vt_val;
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struct symbol *wsym = (struct symbol *) NULL;
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struct type *wtype;
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struct block *block = (struct block *) NULL;
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int is_this_fld;
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if (msymbol != NULL)
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wsym = lookup_symbol (DEPRECATED_SYMBOL_NAME (msymbol), block,
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VAR_DOMAIN, &is_this_fld, NULL);
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if (wsym)
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{
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wtype = SYMBOL_TYPE (wsym);
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}
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else
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{
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wtype = TYPE_TARGET_TYPE (type);
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}
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vt_val = value_at (wtype, vt_address);
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common_val_print (vt_val, stream, format,
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deref_ref, recurse + 1, pretty);
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if (pretty)
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{
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fprintf_filtered (stream, "\n");
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print_spaces_filtered (2 + 2 * recurse, stream);
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}
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}
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}
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/* Return number of characters printed, including the terminating
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'\0' if we reached the end. val_print_string takes care including
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the terminating '\0' if necessary. */
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return i;
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}
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break;
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case TYPE_CODE_REF:
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elttype = check_typedef (TYPE_TARGET_TYPE (type));
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if (addressprint)
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{
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CORE_ADDR addr
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= extract_typed_address (valaddr + embedded_offset, type);
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fprintf_filtered (stream, "@");
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deprecated_print_address_numeric (addr, 1, stream);
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if (deref_ref)
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fputs_filtered (": ", stream);
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}
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/* De-reference the reference. */
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if (deref_ref)
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{
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if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
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{
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struct value *deref_val =
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value_at
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(TYPE_TARGET_TYPE (type),
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unpack_pointer (lookup_pointer_type (builtin_type_void),
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valaddr + embedded_offset));
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common_val_print (deref_val, stream, format, deref_ref,
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recurse, pretty);
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}
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else
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fputs_filtered ("???", stream);
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}
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break;
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case TYPE_CODE_UNION:
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if (recurse && !unionprint)
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{
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fprintf_filtered (stream, "{...}");
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break;
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}
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/* Fall through. */
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case TYPE_CODE_STRUCT:
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/*FIXME: Abstract this away */
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if (vtblprint && cp_is_vtbl_ptr_type (type))
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{
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/* Print the unmangled name if desired. */
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/* Print vtable entry - we only get here if NOT using
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-fvtable_thunks. (Otherwise, look under TYPE_CODE_PTR.) */
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int offset = (embedded_offset +
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TYPE_FIELD_BITPOS (type, VTBL_FNADDR_OFFSET) / 8);
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struct type *field_type = TYPE_FIELD_TYPE (type, VTBL_FNADDR_OFFSET);
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CORE_ADDR addr
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= extract_typed_address (valaddr + offset, field_type);
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print_function_pointer_address (addr, stream);
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}
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else
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cp_print_value_fields (type, type, valaddr, embedded_offset, address, stream, format,
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recurse, pretty, NULL, 0);
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break;
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case TYPE_CODE_ENUM:
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if (format)
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{
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print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream);
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break;
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}
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len = TYPE_NFIELDS (type);
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val = unpack_long (type, valaddr + embedded_offset);
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for (i = 0; i < len; i++)
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{
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QUIT;
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if (val == TYPE_FIELD_BITPOS (type, i))
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{
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break;
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}
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}
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if (i < len)
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{
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fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
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}
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else
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{
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print_longest (stream, 'd', 0, val);
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}
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break;
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case TYPE_CODE_FLAGS:
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if (format)
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print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream);
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else
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val_print_type_code_flags (type, valaddr + embedded_offset, stream);
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break;
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case TYPE_CODE_FUNC:
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case TYPE_CODE_METHOD:
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if (format)
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{
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print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream);
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break;
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}
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/* FIXME, we should consider, at least for ANSI C language, eliminating
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the distinction made between FUNCs and POINTERs to FUNCs. */
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fprintf_filtered (stream, "{");
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type_print (type, "", stream, -1);
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fprintf_filtered (stream, "} ");
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/* Try to print what function it points to, and its address. */
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print_address_demangle (address, stream, demangle);
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break;
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case TYPE_CODE_BOOL:
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format = format ? format : output_format;
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if (format)
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print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream);
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else
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{
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val = unpack_long (type, valaddr + embedded_offset);
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if (val == 0)
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fputs_filtered ("false", stream);
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else if (val == 1)
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fputs_filtered ("true", stream);
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else
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print_longest (stream, 'd', 0, val);
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}
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break;
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case TYPE_CODE_RANGE:
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/* FIXME: create_range_type does not set the unsigned bit in a
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range type (I think it probably should copy it from the target
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type), so we won't print values which are too large to
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fit in a signed integer correctly. */
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/* FIXME: Doesn't handle ranges of enums correctly. (Can't just
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print with the target type, though, because the size of our type
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and the target type might differ). */
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/* FALLTHROUGH */
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case TYPE_CODE_INT:
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format = format ? format : output_format;
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if (format)
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{
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print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream);
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}
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else
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{
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val_print_type_code_int (type, valaddr + embedded_offset, stream);
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/* C and C++ has no single byte int type, char is used instead.
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Since we don't know whether the value is really intended to
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be used as an integer or a character, print the character
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equivalent as well. */
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if (textual_element_type (type, format))
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{
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fputs_filtered (" ", stream);
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LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr + embedded_offset),
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stream);
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}
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}
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break;
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case TYPE_CODE_CHAR:
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format = format ? format : output_format;
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if (format)
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{
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print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream);
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}
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else
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{
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val = unpack_long (type, valaddr + embedded_offset);
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if (TYPE_UNSIGNED (type))
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fprintf_filtered (stream, "%u", (unsigned int) val);
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else
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fprintf_filtered (stream, "%d", (int) val);
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fputs_filtered (" ", stream);
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LA_PRINT_CHAR ((unsigned char) val, stream);
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}
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break;
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case TYPE_CODE_FLT:
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if (format)
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{
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print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream);
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}
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else
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{
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print_floating (valaddr + embedded_offset, type, stream);
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}
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break;
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case TYPE_CODE_VOID:
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fprintf_filtered (stream, "void");
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break;
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case TYPE_CODE_ERROR:
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fprintf_filtered (stream, _("<error type>"));
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break;
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case TYPE_CODE_UNDEF:
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/* This happens (without TYPE_FLAG_STUB set) on systems which don't use
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dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
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and no complete type for struct foo in that file. */
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fprintf_filtered (stream, _("<incomplete type>"));
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break;
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case TYPE_CODE_COMPLEX:
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if (format)
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print_scalar_formatted (valaddr + embedded_offset,
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TYPE_TARGET_TYPE (type),
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format, 0, stream);
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else
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print_floating (valaddr + embedded_offset, TYPE_TARGET_TYPE (type),
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stream);
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fprintf_filtered (stream, " + ");
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if (format)
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print_scalar_formatted (valaddr + embedded_offset
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+ TYPE_LENGTH (TYPE_TARGET_TYPE (type)),
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TYPE_TARGET_TYPE (type),
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||
format, 0, stream);
|
||
else
|
||
print_floating (valaddr + embedded_offset
|
||
+ TYPE_LENGTH (TYPE_TARGET_TYPE (type)),
|
||
TYPE_TARGET_TYPE (type),
|
||
stream);
|
||
fprintf_filtered (stream, " * I");
|
||
break;
|
||
|
||
default:
|
||
error (_("Invalid C/C++ type code %d in symbol table."), TYPE_CODE (type));
|
||
}
|
||
gdb_flush (stream);
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
c_value_print (struct value *val, struct ui_file *stream, int format,
|
||
enum val_prettyprint pretty)
|
||
{
|
||
struct type *type, *real_type;
|
||
int full, top, using_enc;
|
||
|
||
/* If it is a pointer, indicate what it points to.
|
||
|
||
Print type also if it is a reference.
|
||
|
||
C++: if it is a member pointer, we will take care
|
||
of that when we print it. */
|
||
|
||
type = check_typedef (value_type (val));
|
||
|
||
if (TYPE_CODE (type) == TYPE_CODE_PTR
|
||
|| TYPE_CODE (type) == TYPE_CODE_REF)
|
||
{
|
||
/* Hack: remove (char *) for char strings. Their
|
||
type is indicated by the quoted string anyway.
|
||
(Don't use textual_element_type here; quoted strings
|
||
are always exactly (char *). */
|
||
if (TYPE_CODE (type) == TYPE_CODE_PTR
|
||
&& TYPE_NAME (type) == NULL
|
||
&& TYPE_NAME (TYPE_TARGET_TYPE (type)) != NULL
|
||
&& strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "char") == 0)
|
||
{
|
||
/* Print nothing */
|
||
}
|
||
else if (objectprint && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
|
||
{
|
||
|
||
if (TYPE_CODE(type) == TYPE_CODE_REF)
|
||
{
|
||
/* Copy value, change to pointer, so we don't get an
|
||
* error about a non-pointer type in value_rtti_target_type
|
||
*/
|
||
struct value *temparg;
|
||
temparg=value_copy(val);
|
||
deprecated_set_value_type (temparg, lookup_pointer_type (TYPE_TARGET_TYPE(type)));
|
||
val=temparg;
|
||
}
|
||
/* Pointer to class, check real type of object */
|
||
fprintf_filtered (stream, "(");
|
||
real_type = value_rtti_target_type (val, &full, &top, &using_enc);
|
||
if (real_type)
|
||
{
|
||
/* RTTI entry found */
|
||
if (TYPE_CODE (type) == TYPE_CODE_PTR)
|
||
{
|
||
/* create a pointer type pointing to the real type */
|
||
type = lookup_pointer_type (real_type);
|
||
}
|
||
else
|
||
{
|
||
/* create a reference type referencing the real type */
|
||
type = lookup_reference_type (real_type);
|
||
}
|
||
/* JYG: Need to adjust pointer value. */
|
||
/* NOTE: cagney/2005-01-02: THIS IS BOGUS. */
|
||
value_contents_writeable (val)[0] -= top;
|
||
|
||
/* Note: When we look up RTTI entries, we don't get any
|
||
information on const or volatile attributes */
|
||
}
|
||
type_print (type, "", stream, -1);
|
||
fprintf_filtered (stream, ") ");
|
||
}
|
||
else
|
||
{
|
||
/* normal case */
|
||
fprintf_filtered (stream, "(");
|
||
type_print (value_type (val), "", stream, -1);
|
||
fprintf_filtered (stream, ") ");
|
||
}
|
||
}
|
||
|
||
if (!value_initialized (val))
|
||
fprintf_filtered (stream, " [uninitialized] ");
|
||
|
||
if (objectprint && (TYPE_CODE (type) == TYPE_CODE_CLASS))
|
||
{
|
||
/* Attempt to determine real type of object */
|
||
real_type = value_rtti_type (val, &full, &top, &using_enc);
|
||
if (real_type)
|
||
{
|
||
/* We have RTTI information, so use it */
|
||
val = value_full_object (val, real_type, full, top, using_enc);
|
||
fprintf_filtered (stream, "(%s%s) ",
|
||
TYPE_NAME (real_type),
|
||
full ? "" : _(" [incomplete object]"));
|
||
/* Print out object: enclosing type is same as real_type if full */
|
||
return val_print (value_enclosing_type (val),
|
||
value_contents_all (val), 0,
|
||
VALUE_ADDRESS (val), stream, format, 1, 0, pretty);
|
||
/* Note: When we look up RTTI entries, we don't get any information on
|
||
const or volatile attributes */
|
||
}
|
||
else if (type != check_typedef (value_enclosing_type (val)))
|
||
{
|
||
/* No RTTI information, so let's do our best */
|
||
fprintf_filtered (stream, "(%s ?) ",
|
||
TYPE_NAME (value_enclosing_type (val)));
|
||
return val_print (value_enclosing_type (val),
|
||
value_contents_all (val), 0,
|
||
VALUE_ADDRESS (val), stream, format, 1, 0, pretty);
|
||
}
|
||
/* Otherwise, we end up at the return outside this "if" */
|
||
}
|
||
|
||
return val_print (type, value_contents_all (val),
|
||
value_embedded_offset (val),
|
||
VALUE_ADDRESS (val) + value_offset (val),
|
||
stream, format, 1, 0, pretty);
|
||
}
|