199b2450f6
Change all references to stdout/stderr to gdb_stdout/gdb_stderr. Replace all calls to stdio output functions with calls to corresponding _unfiltered functions (`fprintf_unfiltered') Replaced calls to fopen for output to gdb_fopen. Added sufficient goo to utils.c and defs.h to make the above work. The net effect is that stdio output functions are only directly used in utils.c. Elsewhere, the _unfiltered and _filtered functions and GDB_FILE type are used. In the near future, GDB_FILE will stop being equivalant to FILE. The semantics of some commands has changed in a very subtle way: called in the right context, they may cause new occurences of prompt_for_continue() behavior. The testsuite doesn't notice anything like this, though. Please respect this change by not reintroducing stdio output dependencies in the main body of gdb code. All output from commands should go to a GDB_FILE. Target-specific code can still use stdio directly to communicate with targets.
416 lines
11 KiB
C
416 lines
11 KiB
C
/* Support for printing C values for GDB, the GNU debugger.
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Copyright 1986, 1988, 1989, 1991 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 2 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, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.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 "demangle.h"
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#include "valprint.h"
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#include "language.h"
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/* BEGIN-FIXME */
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extern int vtblprint; /* Controls printing of vtbl's */
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extern int demangle; /* whether to print C++ syms raw or src-form */
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extern void
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cp_print_class_member PARAMS ((char *, struct type *, GDB_FILE *, char *));
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extern void
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cp_print_class_method PARAMS ((char *, struct type *, GDB_FILE *));
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extern void
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cp_print_value_fields PARAMS ((struct type *, char *, GDB_FILE *, int, int,
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enum val_prettyprint, struct type **));
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extern int
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cp_is_vtbl_ptr_type PARAMS ((struct type *));
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extern int
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cp_is_vtbl_member PARAMS ((struct type *));
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/* END-FIXME */
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/* BEGIN-FIXME: Hooks into c-typeprint.c */
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extern void
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c_type_print_varspec_prefix PARAMS ((struct type *, GDB_FILE *, int, int));
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extern void
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cp_type_print_method_args PARAMS ((struct type **, char *, char *, int,
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GDB_FILE *));
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/* END-FIXME */
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extern struct obstack dont_print_obstack;
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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 (type, valaddr, address, stream, format, deref_ref, recurse,
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pretty)
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struct type *type;
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char *valaddr;
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CORE_ADDR address;
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GDB_FILE *stream;
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int format;
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int deref_ref;
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int recurse;
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enum val_prettyprint pretty;
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{
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register 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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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_ARRAY:
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if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
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{
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elttype = TYPE_TARGET_TYPE (type);
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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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/* For an array of chars, print with string syntax. */
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if (eltlen == 1 && TYPE_CODE (elttype) == TYPE_CODE_INT
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&& (format == 0 || format == 's'))
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{
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LA_PRINT_STRING (stream, valaddr, len, 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, 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_PTR:
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if (format && format != 's')
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{
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print_scalar_formatted (valaddr, type, format, 0, stream);
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break;
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}
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if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD)
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{
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cp_print_class_method (valaddr, type, stream);
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}
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else if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_MEMBER)
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{
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cp_print_class_member (valaddr,
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TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type)),
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stream, "&");
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}
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else
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{
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addr = unpack_pointer (type, valaddr);
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print_unpacked_pointer:
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elttype = TYPE_TARGET_TYPE (type);
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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_address_demangle (addr, stream, demangle);
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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 && format != 's')
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{
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fprintf_filtered (stream, "0x%lx", (unsigned long)addr);
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}
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/* For a pointer to char or unsigned char, also print the string
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pointed to, unless pointer is null. */
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if (TYPE_LENGTH (elttype) == 1
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&& TYPE_CODE (elttype) == TYPE_CODE_INT
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&& (format == 0 || format == 's')
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&& addr != 0)
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{
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i = val_print_string (addr, 0, 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);
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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_SOURCE_NAME (msymbol), stream);
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fputs_filtered (">", stream);
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}
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if (vtblprint)
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{
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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 symtab *s;
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struct block *block = (struct block *)NULL;
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int is_this_fld;
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wsym = lookup_symbol (SYMBOL_NAME(msymbol), block,
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VAR_NAMESPACE, &is_this_fld, &s);
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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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val_print (VALUE_TYPE (vt_val), VALUE_CONTENTS (vt_val),
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VALUE_ADDRESS (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, plus one for the
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terminating null if we have "reached the end". */
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return (i + (print_max && i != print_max));
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}
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break;
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case TYPE_CODE_MEMBER:
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error ("not implemented: member type in c_val_print");
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break;
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case TYPE_CODE_REF:
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if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_MEMBER)
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{
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cp_print_class_member (valaddr,
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TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type)),
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stream, "");
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break;
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}
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if (addressprint)
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{
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fprintf_filtered (stream, "@0x%lx",
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unpack_long (builtin_type_int, valaddr));
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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 (TYPE_TARGET_TYPE (type)) != TYPE_CODE_UNDEF)
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{
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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));
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val_print (VALUE_TYPE (deref_val),
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VALUE_CONTENTS (deref_val),
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VALUE_ADDRESS (deref_val), stream, format,
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deref_ref, recurse + 1, 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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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_address_demangle(*((int *) (valaddr + /* FIXME bytesex */
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TYPE_FIELD_BITPOS (type, VTBL_FNADDR_OFFSET) / 8)),
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stream, demangle);
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break;
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}
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cp_print_value_fields (type, valaddr, stream, format, recurse, pretty,
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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, 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);
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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_FUNC:
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if (format)
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{
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print_scalar_formatted (valaddr, 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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/* Do something at least vaguely reasonable, for example if the
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language is set wrong. */
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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, 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, 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 (TYPE_LENGTH (type) == 1)
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{
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fputs_filtered (" ", stream);
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LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr),
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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, type, format, 0, stream);
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}
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else
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{
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fprintf_filtered (stream, TYPE_UNSIGNED (type) ? "%u" : "%d",
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unpack_long (type, valaddr));
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fputs_filtered (" ", stream);
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LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr), 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, type, format, 0, stream);
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}
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else
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{
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print_floating (valaddr, 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_RANGE:
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/* FIXME, we should not ever have to print one of these yet. */
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fprintf_filtered (stream, "<range 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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default:
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error ("Invalid C/C++ type code %d in symbol table.", TYPE_CODE (type));
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}
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gdb_flush (stream);
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return (0);
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}
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