[binutils.git] / gdb / cp-valprint.c

/* Support for printing C++ values for GDB, the GNU debugger.
   Copyright 1986, 1988, 1989, 1991 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "defs.h"
#include "obstack.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "value.h"
#include "command.h"
#include "gdbcmd.h"
#include "demangle.h"

int vtblprint;			/* Controls printing of vtbl's */
int objectprint;		/* Controls looking up an object's derived type
				   using what we find in its vtables.  */
struct obstack dont_print_obstack;

static void
cplus_print_value PARAMS ((struct type *, char *, GDB_FILE *, int, int,
			   enum val_prettyprint, struct type **));

/* BEGIN-FIXME:  Hooks into typeprint.c, find a better home for prototypes. */

extern void
c_type_print_base PARAMS ((struct type *, GDB_FILE *, int, int));

extern void
c_type_print_varspec_prefix PARAMS ((struct type *, GDB_FILE *, int, int));

extern void
cp_type_print_method_args PARAMS ((struct type **, char *, char *, int,
				   GDB_FILE *));

extern struct obstack dont_print_obstack;

/* END-FIXME */

void
cp_print_class_method (valaddr, type, stream)
     char *valaddr;
     struct type *type;
     GDB_FILE *stream;
{
  struct type *domain;
  struct fn_field *f = NULL;
  int j = 0;
  int len2;
  int offset;
  char *kind = "";
  CORE_ADDR addr;
  struct symbol *sym;
  unsigned len;
  unsigned int i;

  check_stub_type (TYPE_TARGET_TYPE (type));
  domain = TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type));
  if (domain == (struct type *)NULL)
    {
      fprintf_filtered (stream, "<unknown>");
      return;
    }
  addr = unpack_pointer (lookup_pointer_type (builtin_type_void), valaddr);
  if (METHOD_PTR_IS_VIRTUAL (addr))
    {
      offset = METHOD_PTR_TO_VOFFSET (addr);
      len = TYPE_NFN_FIELDS (domain);
      for (i = 0; i < len; i++)
	{
	  f = TYPE_FN_FIELDLIST1 (domain, i);
	  len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	  
	  for (j = 0; j < len2; j++)
	    {
	      QUIT;
	      if (TYPE_FN_FIELD_VOFFSET (f, j) == offset)
		{
		  kind = "virtual ";
		  goto common;
		}
	    }
	}
    }
  else
    {
      sym = find_pc_function (addr);
      if (sym == 0)
	{
	  error ("invalid pointer to member function");
	}
      len = TYPE_NFN_FIELDS (domain);
      for (i = 0; i < len; i++)
	{
	  f = TYPE_FN_FIELDLIST1 (domain, i);
	  len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	  
	  for (j = 0; j < len2; j++)
	    {
	      QUIT;
	      if (TYPE_FN_FIELD_STUB (f, j))
		check_stub_method (domain, i, j);
	      if (STREQ (SYMBOL_NAME (sym), TYPE_FN_FIELD_PHYSNAME (f, j)))
		{
		  goto common;
		}
	    }
	}
    }
  common:
  if (i < len)
    {
      fprintf_filtered (stream, "&");
      c_type_print_varspec_prefix (TYPE_FN_FIELD_TYPE (f, j), stream, 0, 0);
      fprintf_unfiltered (stream, kind);
      if (TYPE_FN_FIELD_PHYSNAME (f, j)[0] == '_'
	  && TYPE_FN_FIELD_PHYSNAME (f, j)[1] == CPLUS_MARKER)
	{
	  cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j) + 1, "~",
				     TYPE_FN_FIELDLIST_NAME (domain, i),
				     0, stream);
	}
      else
	{
	  cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j), "",
				     TYPE_FN_FIELDLIST_NAME (domain, i),
				     0, stream);
	}
    }
  else
    {
      fprintf_filtered (stream, "(");
      type_print (type, "", stream, -1);
      fprintf_filtered (stream, ") %d", (int) addr >> 3);
    }
}

/* Return truth value for assertion that TYPE is of the type
   "pointer to virtual function".  */

int
cp_is_vtbl_ptr_type(type)
     struct type *type;
{
  char *typename = type_name_no_tag (type);
  /* This was what it was for gcc 2.4.5 and earlier.  */
  static const char vtbl_ptr_name_old[] =
    { CPLUS_MARKER,'v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };
  /* It was changed to this after 2.4.5.  */
  static const char vtbl_ptr_name[] =
    { '_','_','v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };

  return (typename != NULL
	  && (STREQ (typename, vtbl_ptr_name)
	      || STREQ (typename, vtbl_ptr_name_old)));
}

/* Return truth value for the assertion that TYPE is of the type
   "pointer to virtual function table".  */

int
cp_is_vtbl_member(type)
     struct type *type;
{
  if (TYPE_CODE (type) == TYPE_CODE_PTR)
    type = TYPE_TARGET_TYPE (type);
  else
    return 0;

  if (TYPE_CODE (type) == TYPE_CODE_ARRAY
      && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT)
    /* Virtual functions tables are full of pointers to virtual functions.  */
    return cp_is_vtbl_ptr_type (TYPE_TARGET_TYPE (type));
  return 0;
}

/* Mutually recursive subroutines of cplus_print_value and c_val_print to
   print out a structure's fields: cp_print_value_fields and cplus_print_value.

   TYPE, VALADDR, STREAM, RECURSE, and PRETTY have the
   same meanings as in cplus_print_value and c_val_print.

   DONT_PRINT is an array of baseclass types that we
   should not print, or zero if called from top level.  */

void
cp_print_value_fields (type, valaddr, stream, format, recurse, pretty,
		       dont_print)
     struct type *type;
     char *valaddr;
     GDB_FILE *stream;
     int format;
     int recurse;
     enum val_prettyprint pretty;
     struct type **dont_print;
{
  int i, len, n_baseclasses;

  check_stub_type (type);

  fprintf_filtered (stream, "{");
  len = TYPE_NFIELDS (type);
  n_baseclasses = TYPE_N_BASECLASSES (type);

  /* Print out baseclasses such that we don't print
     duplicates of virtual baseclasses.  */
  if (n_baseclasses > 0)
    cplus_print_value (type, valaddr, stream, format, recurse+1, pretty,
		       dont_print);

  if (!len && n_baseclasses == 1)
    fprintf_filtered (stream, "<No data fields>");
  else
    {
      extern int inspect_it;
      int fields_seen = 0;

      for (i = n_baseclasses; i < len; i++)
	{
	  /* Check if static field */
	  if (TYPE_FIELD_STATIC (type, i))
	    continue;
	  if (fields_seen)
	    fprintf_filtered (stream, ", ");
	  else if (n_baseclasses > 0)
	    {
	      if (pretty)
		{
		  fprintf_filtered (stream, "\n");
		  print_spaces_filtered (2 + 2 * recurse, stream);
		  fputs_filtered ("members of ", stream);
		  fputs_filtered (type_name_no_tag (type), stream);
		  fputs_filtered (": ", stream);
		}
	    }
	  fields_seen = 1;

	  if (pretty)
	    {
	      fprintf_filtered (stream, "\n");
	      print_spaces_filtered (2 + 2 * recurse, stream);
	    }
	  else 
	    {
	      wrap_here (n_spaces (2 + 2 * recurse));
	    }
	  if (inspect_it)
	    {
	      if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
		fputs_filtered ("\"( ptr \"", stream);
	      else
		fputs_filtered ("\"( nodef \"", stream);
	      fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
				       language_cplus,
				       DMGL_PARAMS | DMGL_ANSI);
	      fputs_filtered ("\" \"", stream);
	      fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
				       language_cplus,
				       DMGL_PARAMS | DMGL_ANSI);
	      fputs_filtered ("\") \"", stream);
	    }
	  else
	    {
	      fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
				       language_cplus,
				       DMGL_PARAMS | DMGL_ANSI);
	      fputs_filtered (" = ", stream);
	    }
	  if (TYPE_FIELD_PACKED (type, i))
	    {
	      value v;

	      /* Bitfields require special handling, especially due to byte
		 order problems.  */
	      if (TYPE_FIELD_IGNORE (type, i))
		{
		   fputs_filtered ("<optimized out or zero length>", stream);
		}
	      else
		{
	           v = value_from_longest (TYPE_FIELD_TYPE (type, i),
				   unpack_field_as_long (type, valaddr, i));

                   val_print (TYPE_FIELD_TYPE(type, i), VALUE_CONTENTS (v), 0,
			      stream, format, 0, recurse + 1, pretty);
		}
	    }
	  else
	    {
	      if (TYPE_FIELD_IGNORE (type, i))
		{
		   fputs_filtered ("<optimized out or zero length>", stream);
		}
	      else
		{
	           val_print (TYPE_FIELD_TYPE (type, i), 
			      valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
			      0, stream, format, 0, recurse + 1, pretty);
		}
	    }
	}
      if (pretty)
	{
	  fprintf_filtered (stream, "\n");
	  print_spaces_filtered (2 * recurse, stream);
	}
    }
  fprintf_filtered (stream, "}");
}

/* Special val_print routine to avoid printing multiple copies of virtual
   baseclasses.  */

static void
cplus_print_value (type, valaddr, stream, format, recurse, pretty, dont_print)
     struct type *type;
     char *valaddr;
     GDB_FILE *stream;
     int format;
     int recurse;
     enum val_prettyprint pretty;
     struct type **dont_print;
{
  struct obstack tmp_obstack;
  struct type **last_dont_print
    = (struct type **)obstack_next_free (&dont_print_obstack);
  int i, n_baseclasses = TYPE_N_BASECLASSES (type);

  if (dont_print == 0)
    {
      /* If we're at top level, carve out a completely fresh
	 chunk of the obstack and use that until this particular
	 invocation returns.  */
      tmp_obstack = dont_print_obstack;
      /* Bump up the high-water mark.  Now alpha is omega.  */
      obstack_finish (&dont_print_obstack);
    }

  for (i = 0; i < n_baseclasses; i++)
    {
      char *baddr;
      int err;
      char *basename;

      check_stub_type (TYPE_BASECLASS (type, i));
      basename = TYPE_NAME (TYPE_BASECLASS (type, i));

      if (BASETYPE_VIA_VIRTUAL (type, i))
	{
	  struct type **first_dont_print
	    = (struct type **)obstack_base (&dont_print_obstack);

	  int j = (struct type **)obstack_next_free (&dont_print_obstack)
	    - first_dont_print;

	  while (--j >= 0)
	    if (TYPE_BASECLASS (type, i) == first_dont_print[j])
	      goto flush_it;

	  obstack_ptr_grow (&dont_print_obstack, TYPE_BASECLASS (type, i));
	}

      /* Fix to use baseclass_offset instead. FIXME */
      baddr = baseclass_addr (type, i, valaddr, 0, &err);
      if (err == 0 && baddr == 0)
	error ("could not find virtual baseclass %s\n",
	       basename ? basename : "");

      if (pretty)
	{
	  fprintf_filtered (stream, "\n");
	  print_spaces_filtered (2 * recurse, stream);
	}
      fputs_filtered ("<", stream);
      /* Not sure what the best notation is in the case where there is no
	 baseclass name.  */
      fputs_filtered (basename ? basename : "", stream);
      fputs_filtered ("> = ", stream);
      if (err != 0)
	fprintf_filtered (stream,
			  "<invalid address 0x%lx>", (unsigned long) baddr);
      else
	cp_print_value_fields (TYPE_BASECLASS (type, i), baddr, stream, format,
			       recurse, pretty,
			       (struct type **) obstack_base (&dont_print_obstack));
      fputs_filtered (", ", stream);

    flush_it:
      ;
    }

  if (dont_print == 0)
    {
      /* Free the space used to deal with the printing
	 of this type from top level.  */
      obstack_free (&dont_print_obstack, last_dont_print);
      /* Reset watermark so that we can continue protecting
	 ourselves from whatever we were protecting ourselves.  */
      dont_print_obstack = tmp_obstack;
    }
}

void
cp_print_class_member (valaddr, domain, stream, prefix)
     char *valaddr;
     struct type *domain;
     GDB_FILE *stream;
     char *prefix;
{
  
  /* VAL is a byte offset into the structure type DOMAIN.
     Find the name of the field for that offset and
     print it.  */
  int extra = 0;
  int bits = 0;
  register unsigned int i;
  unsigned len = TYPE_NFIELDS (domain);
  /* @@ Make VAL into bit offset */
  LONGEST val = unpack_long (builtin_type_int, valaddr) << 3;
  for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
    {
      int bitpos = TYPE_FIELD_BITPOS (domain, i);
      QUIT;
      if (val == bitpos)
	break;
      if (val < bitpos && i != 0)
	{
	  /* Somehow pointing into a field.  */
	  i -= 1;
	  extra = (val - TYPE_FIELD_BITPOS (domain, i));
	  if (extra & 0x7)
	    bits = 1;
	  else
	    extra >>= 3;
	  break;
	}
    }
  if (i < len)
    {
      char *name;
      fprintf_filtered (stream, prefix);
      name = type_name_no_tag (domain);
      if (name)
        fputs_filtered (name, stream);
      else
	c_type_print_base (domain, stream, 0, 0);
      fprintf_filtered (stream, "::");
      fputs_filtered (TYPE_FIELD_NAME (domain, i), stream);
      if (extra)
	fprintf_filtered (stream, " + %d bytes", extra);
      if (bits)
	fprintf_filtered (stream, " (offset in bits)");
    }
  else
    fprintf_filtered (stream, "%d", val >> 3);
}

void
_initialize_cp_valprint ()
{
  add_show_from_set
    (add_set_cmd ("vtbl", class_support, var_boolean, (char *)&vtblprint,
		  "Set printing of C++ virtual function tables.",
		  &setprintlist),
     &showprintlist);

  add_show_from_set
    (add_set_cmd ("object", class_support, var_boolean, (char *)&objectprint,
	  "Set printing of object's derived type based on vtable info.",
		  &setprintlist),
     &showprintlist);

  /* Give people the defaults which they are used to.  */
  objectprint = 0;
  vtblprint = 0;
  obstack_begin (&dont_print_obstack, 32 * sizeof (struct type *));
}
Commit	Line	Data
a8a69e63 FF	1	/* Support for printing C++ values for GDB, the GNU debugger.
	2	Copyright 1986, 1988, 1989, 1991 Free Software Foundation, Inc.
	3
	4	This file is part of GDB.
	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2 of the License, or
	9	(at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
	19
	20	#include "defs.h"
	21	#include "obstack.h"
	22	#include "symtab.h"
	23	#include "gdbtypes.h"
	24	#include "expression.h"
	25	#include "value.h"
	26	#include "command.h"
	27	#include "gdbcmd.h"
5e81259d	28	#include "demangle.h"
a8a69e63 FF	29
	30	int vtblprint; /* Controls printing of vtbl's */
	31	int objectprint; /* Controls looking up an object's derived type
	32	using what we find in its vtables. */
	33	struct obstack dont_print_obstack;
	34
	35	static void
199b2450	36	cplus_print_value PARAMS ((struct type , char , GDB_FILE *, int, int,
a8a69e63 FF	37	enum val_prettyprint, struct type **));
	38
	39	/* BEGIN-FIXME: Hooks into typeprint.c, find a better home for prototypes. */
	40
	41	extern void
199b2450	42	c_type_print_base PARAMS ((struct type , GDB_FILE , int, int));
a8a69e63 FF	43
a8a69e63 FF	44	extern void
199b2450	45	c_type_print_varspec_prefix PARAMS ((struct type , GDB_FILE , int, int));
a8a69e63 FF	46
	47	extern void
	48	cp_type_print_method_args PARAMS ((struct type *, char , char *, int,
199b2450	49	GDB_FILE *));
a8a69e63 FF	50
	51	extern struct obstack dont_print_obstack;
	52
	53	/* END-FIXME */
	54
c7da3ed3 FF	55	void
	56	cp_print_class_method (valaddr, type, stream)
	57	char *valaddr;
	58	struct type *type;
199b2450	59	GDB_FILE *stream;
c7da3ed3 FF	60	{
c7da3ed3 FF	61	struct type *domain;
72cd0384 RP	62	struct fn_field *f = NULL;
72cd0384 RP	63	int j = 0;
c7da3ed3 FF	64	int len2;
	65	int offset;
	66	char *kind = "";
	67	CORE_ADDR addr;
	68	struct symbol *sym;
	69	unsigned len;
	70	unsigned int i;
	71
30d20d15	72	check_stub_type (TYPE_TARGET_TYPE (type));
c7da3ed3	73	domain = TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type));
30d20d15 PS	74	if (domain == (struct type *)NULL)
	75	{
	76	fprintf_filtered (stream, "<unknown>");
	77	return;
	78	}
c7da3ed3 FF	79	addr = unpack_pointer (lookup_pointer_type (builtin_type_void), valaddr);
	80	if (METHOD_PTR_IS_VIRTUAL (addr))
	81	{
	82	offset = METHOD_PTR_TO_VOFFSET (addr);
	83	len = TYPE_NFN_FIELDS (domain);
	84	for (i = 0; i < len; i++)
	85	{
	86	f = TYPE_FN_FIELDLIST1 (domain, i);
	87	len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	88
	89	for (j = 0; j < len2; j++)
	90	{
	91	QUIT;
	92	if (TYPE_FN_FIELD_VOFFSET (f, j) == offset)
	93	{
	94	kind = "virtual ";
	95	goto common;
	96	}
	97	}
	98	}
	99	}
	100	else
	101	{
	102	sym = find_pc_function (addr);
	103	if (sym == 0)
	104	{
	105	error ("invalid pointer to member function");
	106	}
	107	len = TYPE_NFN_FIELDS (domain);
	108	for (i = 0; i < len; i++)
	109	{
	110	f = TYPE_FN_FIELDLIST1 (domain, i);
	111	len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	112
	113	for (j = 0; j < len2; j++)
	114	{
	115	QUIT;
39cb3d04 PS	116	if (TYPE_FN_FIELD_STUB (f, j))
39cb3d04 PS	117	check_stub_method (domain, i, j);
c7da3ed3 FF	118	if (STREQ (SYMBOL_NAME (sym), TYPE_FN_FIELD_PHYSNAME (f, j)))
	119	{
	120	goto common;
	121	}
	122	}
	123	}
	124	}
	125	common:
	126	if (i < len)
	127	{
	128	fprintf_filtered (stream, "&");
	129	c_type_print_varspec_prefix (TYPE_FN_FIELD_TYPE (f, j), stream, 0, 0);
199b2450	130	fprintf_unfiltered (stream, kind);
c7da3ed3 FF	131	if (TYPE_FN_FIELD_PHYSNAME (f, j)[0] == '_'
	132	&& TYPE_FN_FIELD_PHYSNAME (f, j)[1] == CPLUS_MARKER)
	133	{
	134	cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j) + 1, "~",
	135	TYPE_FN_FIELDLIST_NAME (domain, i),
	136	0, stream);
	137	}
	138	else
	139	{
	140	cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j), "",
	141	TYPE_FN_FIELDLIST_NAME (domain, i),
	142	0, stream);
	143	}
	144	}
	145	else
	146	{
	147	fprintf_filtered (stream, "(");
	148	type_print (type, "", stream, -1);
	149	fprintf_filtered (stream, ") %d", (int) addr >> 3);
	150	}
	151	}
	152
a8a69e63 FF	153	/* Return truth value for assertion that TYPE is of the type
	154	"pointer to virtual function". */
	155
	156	int
	157	cp_is_vtbl_ptr_type(type)
	158	struct type *type;
	159	{
	160	char *typename = type_name_no_tag (type);
8f341c15 JK	161	/* This was what it was for gcc 2.4.5 and earlier. */
8f341c15 JK	162	static const char vtbl_ptr_name_old[] =
a8a69e63	163	{ CPLUS_MARKER,'v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };
8f341c15	164	/* It was changed to this after 2.4.5. */
b0dd16a5 KH	165	static const char vtbl_ptr_name[] =
b0dd16a5 KH	166	{ '_','_','v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };
a8a69e63	167
8f341c15 JK	168	return (typename != NULL
	169	&& (STREQ (typename, vtbl_ptr_name)
	170	\|\| STREQ (typename, vtbl_ptr_name_old)));
a8a69e63 FF	171	}
	172
	173	/* Return truth value for the assertion that TYPE is of the type
	174	"pointer to virtual function table". */
	175
	176	int
	177	cp_is_vtbl_member(type)
	178	struct type *type;
	179	{
	180	if (TYPE_CODE (type) == TYPE_CODE_PTR)
	181	type = TYPE_TARGET_TYPE (type);
	182	else
	183	return 0;
	184
	185	if (TYPE_CODE (type) == TYPE_CODE_ARRAY
	186	&& TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT)
	187	/* Virtual functions tables are full of pointers to virtual functions. */
	188	return cp_is_vtbl_ptr_type (TYPE_TARGET_TYPE (type));
	189	return 0;
	190	}
	191
	192	/* Mutually recursive subroutines of cplus_print_value and c_val_print to
	193	print out a structure's fields: cp_print_value_fields and cplus_print_value.
	194
	195	TYPE, VALADDR, STREAM, RECURSE, and PRETTY have the
	196	same meanings as in cplus_print_value and c_val_print.
	197
	198	DONT_PRINT is an array of baseclass types that we
	199	should not print, or zero if called from top level. */
	200
	201	void
	202	cp_print_value_fields (type, valaddr, stream, format, recurse, pretty,
	203	dont_print)
	204	struct type *type;
	205	char *valaddr;
199b2450	206	GDB_FILE *stream;
a8a69e63 FF	207	int format;
	208	int recurse;
	209	enum val_prettyprint pretty;
	210	struct type **dont_print;
	211	{
	212	int i, len, n_baseclasses;
	213
	214	check_stub_type (type);
	215
	216	fprintf_filtered (stream, "{");
	217	len = TYPE_NFIELDS (type);
	218	n_baseclasses = TYPE_N_BASECLASSES (type);
	219
	220	/* Print out baseclasses such that we don't print
	221	duplicates of virtual baseclasses. */
	222	if (n_baseclasses > 0)
	223	cplus_print_value (type, valaddr, stream, format, recurse+1, pretty,
	224	dont_print);
	225
	226	if (!len && n_baseclasses == 1)
	227	fprintf_filtered (stream, "<No data fields>");
	228	else
	229	{
	230	extern int inspect_it;
	231	int fields_seen = 0;
	232
	233	for (i = n_baseclasses; i < len; i++)
	234	{
	235	/* Check if static field */
	236	if (TYPE_FIELD_STATIC (type, i))
	237	continue;
	238	if (fields_seen)
	239	fprintf_filtered (stream, ", ");
	240	else if (n_baseclasses > 0)
	241	{
	242	if (pretty)
	243	{
	244	fprintf_filtered (stream, "\n");
	245	print_spaces_filtered (2 + 2 * recurse, stream);
	246	fputs_filtered ("members of ", stream);
	247	fputs_filtered (type_name_no_tag (type), stream);
	248	fputs_filtered (": ", stream);
	249	}
	250	}
	251	fields_seen = 1;
	252
	253	if (pretty)
	254	{
	255	fprintf_filtered (stream, "\n");
	256	print_spaces_filtered (2 + 2 * recurse, stream);
	257	}
	258	else
	259	{
	260	wrap_here (n_spaces (2 + 2 * recurse));
	261	}
	262	if (inspect_it)
	263	{
	264	if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
	265	fputs_filtered ("\"( ptr \"", stream);
	266	else
	267	fputs_filtered ("\"( nodef \"", stream);
5e81259d FF	268	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	269	language_cplus,
	270	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63	271	fputs_filtered ("\" \"", stream);
5e81259d FF	272	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	273	language_cplus,
	274	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63 FF	275	fputs_filtered ("\") \"", stream);
	276	}
	277	else
	278	{
5e81259d FF	279	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	280	language_cplus,
	281	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63 FF	282	fputs_filtered (" = ", stream);
	283	}
	284	if (TYPE_FIELD_PACKED (type, i))
	285	{
	286	value v;
	287
	288	/* Bitfields require special handling, especially due to byte
	289	order problems. */
024f65b1 KH	290	if (TYPE_FIELD_IGNORE (type, i))
024f65b1 KH	291	{
aa074e84	292	fputs_filtered ("<optimized out or zero length>", stream);
024f65b1 KH	293	}
	294	else
	295	{
	296	v = value_from_longest (TYPE_FIELD_TYPE (type, i),
a8a69e63 FF	297	unpack_field_as_long (type, valaddr, i));
a8a69e63 FF	298
dda398c3 JK	299	val_print (TYPE_FIELD_TYPE(type, i), VALUE_CONTENTS (v), 0,
dda398c3 JK	300	stream, format, 0, recurse + 1, pretty);
024f65b1	301	}
a8a69e63 FF	302	}
	303	else
	304	{
024f65b1 KH	305	if (TYPE_FIELD_IGNORE (type, i))
024f65b1 KH	306	{
aa074e84	307	fputs_filtered ("<optimized out or zero length>", stream);
024f65b1 KH	308	}
	309	else
	310	{
dda398c3 JK	311	val_print (TYPE_FIELD_TYPE (type, i),
	312	valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
	313	0, stream, format, 0, recurse + 1, pretty);
024f65b1	314	}
a8a69e63 FF	315	}
	316	}
	317	if (pretty)
	318	{
	319	fprintf_filtered (stream, "\n");
	320	print_spaces_filtered (2 * recurse, stream);
	321	}
	322	}
	323	fprintf_filtered (stream, "}");
	324	}
	325
	326	/* Special val_print routine to avoid printing multiple copies of virtual
	327	baseclasses. */
	328
	329	static void
	330	cplus_print_value (type, valaddr, stream, format, recurse, pretty, dont_print)
	331	struct type *type;
	332	char *valaddr;
199b2450	333	GDB_FILE *stream;
a8a69e63 FF	334	int format;
	335	int recurse;
	336	enum val_prettyprint pretty;
	337	struct type **dont_print;
	338	{
	339	struct obstack tmp_obstack;
	340	struct type **last_dont_print
	341	= (struct type **)obstack_next_free (&dont_print_obstack);
	342	int i, n_baseclasses = TYPE_N_BASECLASSES (type);
	343
	344	if (dont_print == 0)
	345	{
	346	/* If we're at top level, carve out a completely fresh
	347	chunk of the obstack and use that until this particular
	348	invocation returns. */
	349	tmp_obstack = dont_print_obstack;
	350	/* Bump up the high-water mark. Now alpha is omega. */
	351	obstack_finish (&dont_print_obstack);
	352	}
	353
	354	for (i = 0; i < n_baseclasses; i++)
	355	{
	356	char *baddr;
	357	int err;
2d2fc7e4 JK	358	char *basename;
	359
	360	check_stub_type (TYPE_BASECLASS (type, i));
	361	basename = TYPE_NAME (TYPE_BASECLASS (type, i));
a8a69e63 FF	362
	363	if (BASETYPE_VIA_VIRTUAL (type, i))
	364	{
	365	struct type **first_dont_print
	366	= (struct type **)obstack_base (&dont_print_obstack);
	367
	368	int j = (struct type **)obstack_next_free (&dont_print_obstack)
	369	- first_dont_print;
	370
	371	while (--j >= 0)
	372	if (TYPE_BASECLASS (type, i) == first_dont_print[j])
	373	goto flush_it;
	374
	375	obstack_ptr_grow (&dont_print_obstack, TYPE_BASECLASS (type, i));
	376	}
	377
	378	/* Fix to use baseclass_offset instead. FIXME */
	379	baddr = baseclass_addr (type, i, valaddr, 0, &err);
	380	if (err == 0 && baddr == 0)
1410f5f1 JK	381	error ("could not find virtual baseclass %s\n",
1410f5f1 JK	382	basename ? basename : "");
a8a69e63 FF	383
	384	if (pretty)
	385	{
	386	fprintf_filtered (stream, "\n");
	387	print_spaces_filtered (2 * recurse, stream);
	388	}
	389	fputs_filtered ("<", stream);
1410f5f1 JK	390	/* Not sure what the best notation is in the case where there is no
	391	baseclass name. */
	392	fputs_filtered (basename ? basename : "", stream);
a8a69e63 FF	393	fputs_filtered ("> = ", stream);
a8a69e63 FF	394	if (err != 0)
5573d7d4 JK	395	fprintf_filtered (stream,
5573d7d4 JK	396	"<invalid address 0x%lx>", (unsigned long) baddr);
a8a69e63 FF	397	else
	398	cp_print_value_fields (TYPE_BASECLASS (type, i), baddr, stream, format,
	399	recurse, pretty,
	400	(struct type **) obstack_base (&dont_print_obstack));
	401	fputs_filtered (", ", stream);
	402
	403	flush_it:
	404	;
	405	}
	406
	407	if (dont_print == 0)
	408	{
	409	/* Free the space used to deal with the printing
	410	of this type from top level. */
	411	obstack_free (&dont_print_obstack, last_dont_print);
	412	/* Reset watermark so that we can continue protecting
	413	ourselves from whatever we were protecting ourselves. */
	414	dont_print_obstack = tmp_obstack;
	415	}
	416	}
	417
	418	void
	419	cp_print_class_member (valaddr, domain, stream, prefix)
	420	char *valaddr;
	421	struct type *domain;
199b2450	422	GDB_FILE *stream;
a8a69e63 FF	423	char *prefix;
	424	{
	425
	426	/* VAL is a byte offset into the structure type DOMAIN.
	427	Find the name of the field for that offset and
	428	print it. */
	429	int extra = 0;
	430	int bits = 0;
	431	register unsigned int i;
	432	unsigned len = TYPE_NFIELDS (domain);
	433	/* @@ Make VAL into bit offset */
	434	LONGEST val = unpack_long (builtin_type_int, valaddr) << 3;
	435	for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
	436	{
	437	int bitpos = TYPE_FIELD_BITPOS (domain, i);
	438	QUIT;
	439	if (val == bitpos)
	440	break;
	441	if (val < bitpos && i != 0)
	442	{
	443	/* Somehow pointing into a field. */
	444	i -= 1;
	445	extra = (val - TYPE_FIELD_BITPOS (domain, i));
	446	if (extra & 0x7)
	447	bits = 1;
	448	else
	449	extra >>= 3;
	450	break;
	451	}
	452	}
	453	if (i < len)
	454	{
	455	char *name;
	456	fprintf_filtered (stream, prefix);
	457	name = type_name_no_tag (domain);
	458	if (name)
	459	fputs_filtered (name, stream);
	460	else
	461	c_type_print_base (domain, stream, 0, 0);
	462	fprintf_filtered (stream, "::");
	463	fputs_filtered (TYPE_FIELD_NAME (domain, i), stream);
	464	if (extra)
	465	fprintf_filtered (stream, " + %d bytes", extra);
	466	if (bits)
	467	fprintf_filtered (stream, " (offset in bits)");
	468	}
	469	else
	470	fprintf_filtered (stream, "%d", val >> 3);
	471	}
	472
	473	void
	474	_initialize_cp_valprint ()
	475	{
	476	add_show_from_set
	477	(add_set_cmd ("vtbl", class_support, var_boolean, (char *)&vtblprint,
	478	"Set printing of C++ virtual function tables.",
	479	&setprintlist),
	480	&showprintlist);
	481
	482	add_show_from_set
	483	(add_set_cmd ("object", class_support, var_boolean, (char *)&objectprint,
	484	"Set printing of object's derived type based on vtable info.",
	485	&setprintlist),
	486	&showprintlist);
487
488	/* Give people the defaults which they are used to. */
489	objectprint = 0;
490	vtblprint = 0;
491	obstack_begin (&dont_print_obstack, 32 * sizeof (struct type *));
492	}