[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 *, 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 *, FILE *, int, int));

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

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

extern struct obstack dont_print_obstack;

/* END-FIXME */


/* BEGIN-FIXME:  Hooks into c-valprint.c */

extern int
c_val_print PARAMS ((struct type *, char *, CORE_ADDR, FILE *, int, int, int,
		     enum val_prettyprint));
/* END-FIXME */


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

  domain = TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type));
  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 (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 (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);
  static const char vtbl_ptr_name[] =
    { CPLUS_MARKER,'v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };

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

/* 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;
     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.  */
	      v = value_from_longest (TYPE_FIELD_TYPE (type, i),
				   unpack_field_as_long (type, valaddr, i));

	      c_val_print (TYPE_FIELD_TYPE (type, i), VALUE_CONTENTS (v), 0,
			   stream, format, 0, recurse + 1, pretty);
	    }
	  else
	    {
	      c_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;
     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;

      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",
	       type_name_no_tag (TYPE_BASECLASS (type, i)));

      if (pretty)
	{
	  fprintf_filtered (stream, "\n");
	  print_spaces_filtered (2 * recurse, stream);
	}
      fputs_filtered ("<", stream);
      fputs_filtered (type_name_no_tag (TYPE_BASECLASS (type, i)), stream);
      fputs_filtered ("> = ", stream);
      if (err != 0)
	fprintf_filtered (stream, "<invalid address 0x%x>", 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;
     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
	36	cplus_print_value PARAMS ((struct type , char , FILE *, int, int,
	37	enum val_prettyprint, struct type **));
	38
	39	/* BEGIN-FIXME: Hooks into typeprint.c, find a better home for prototypes. */
	40
	41	extern void
	42	c_type_print_base PARAMS ((struct type , FILE , int, int));
	43
	44	extern void
	45	c_type_print_varspec_prefix PARAMS ((struct type , FILE , int, int));
	46
	47	extern void
	48	cp_type_print_method_args PARAMS ((struct type *, char , char *, int,
	49	FILE *));
	50
	51	extern struct obstack dont_print_obstack;
	52
	53	/* END-FIXME */
	54
	55
	56	/* BEGIN-FIXME: Hooks into c-valprint.c */
	57
	58	extern int
	59	c_val_print PARAMS ((struct type , char , CORE_ADDR, FILE *, int, int, int,
	60	enum val_prettyprint));
	61	/* END-FIXME */
	62
	63
c7da3ed3 FF	64	void
	65	cp_print_class_method (valaddr, type, stream)
	66	char *valaddr;
	67	struct type *type;
	68	FILE *stream;
	69	{
	70	struct type *domain;
	71	struct fn_field *f;
	72	int j;
	73	int len2;
	74	int offset;
	75	char *kind = "";
	76	CORE_ADDR addr;
	77	struct symbol *sym;
	78	unsigned len;
	79	unsigned int i;
	80
	81	domain = TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type));
	82	addr = unpack_pointer (lookup_pointer_type (builtin_type_void), valaddr);
	83	if (METHOD_PTR_IS_VIRTUAL (addr))
	84	{
	85	offset = METHOD_PTR_TO_VOFFSET (addr);
	86	len = TYPE_NFN_FIELDS (domain);
	87	for (i = 0; i < len; i++)
	88	{
	89	f = TYPE_FN_FIELDLIST1 (domain, i);
	90	len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	91
	92	for (j = 0; j < len2; j++)
	93	{
	94	QUIT;
	95	if (TYPE_FN_FIELD_VOFFSET (f, j) == offset)
	96	{
	97	kind = "virtual ";
	98	goto common;
	99	}
	100	}
	101	}
	102	}
	103	else
	104	{
	105	sym = find_pc_function (addr);
	106	if (sym == 0)
	107	{
	108	error ("invalid pointer to member function");
	109	}
	110	len = TYPE_NFN_FIELDS (domain);
	111	for (i = 0; i < len; i++)
	112	{
	113	f = TYPE_FN_FIELDLIST1 (domain, i);
	114	len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	115
	116	for (j = 0; j < len2; j++)
	117	{
	118	QUIT;
	119	if (STREQ (SYMBOL_NAME (sym), TYPE_FN_FIELD_PHYSNAME (f, j)))
	120	{
	121	goto common;
	122	}
	123	}
	124	}
	125	}
	126	common:
	127	if (i < len)
128	{
129	fprintf_filtered (stream, "&");
130	c_type_print_varspec_prefix (TYPE_FN_FIELD_TYPE (f, j), stream, 0, 0);
131	fprintf (stream, kind);
132	if (TYPE_FN_FIELD_PHYSNAME (f, j)[0] == '_'
133	&& TYPE_FN_FIELD_PHYSNAME (f, j)[1] == CPLUS_MARKER)
134	{
135	cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j) + 1, "~",
136	TYPE_FN_FIELDLIST_NAME (domain, i),
137	0, stream);
138	}
139	else
140	{
141	cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j), "",
142	TYPE_FN_FIELDLIST_NAME (domain, i),
143	0, stream);
144	}
145	}
146	else
147	{
148	fprintf_filtered (stream, "(");
149	type_print (type, "", stream, -1);
150	fprintf_filtered (stream, ") %d", (int) addr >> 3);
151	}
152	}
153
a8a69e63 FF	154	/* Return truth value for assertion that TYPE is of the type
	155	"pointer to virtual function". */
	156
	157	int
	158	cp_is_vtbl_ptr_type(type)
	159	struct type *type;
	160	{
	161	char *typename = type_name_no_tag (type);
	162	static const char vtbl_ptr_name[] =
	163	{ CPLUS_MARKER,'v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };
	164
2e4964ad	165	return (typename != NULL && STREQ(typename, vtbl_ptr_name));
a8a69e63 FF	166	}
	167
	168	/* Return truth value for the assertion that TYPE is of the type
	169	"pointer to virtual function table". */
	170
	171	int
	172	cp_is_vtbl_member(type)
	173	struct type *type;
	174	{
	175	if (TYPE_CODE (type) == TYPE_CODE_PTR)
	176	type = TYPE_TARGET_TYPE (type);
	177	else
	178	return 0;
	179
	180	if (TYPE_CODE (type) == TYPE_CODE_ARRAY
	181	&& TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT)
	182	/* Virtual functions tables are full of pointers to virtual functions. */
	183	return cp_is_vtbl_ptr_type (TYPE_TARGET_TYPE (type));
	184	return 0;
	185	}
	186
	187	/* Mutually recursive subroutines of cplus_print_value and c_val_print to
	188	print out a structure's fields: cp_print_value_fields and cplus_print_value.
	189
	190	TYPE, VALADDR, STREAM, RECURSE, and PRETTY have the
	191	same meanings as in cplus_print_value and c_val_print.
	192
	193	DONT_PRINT is an array of baseclass types that we
	194	should not print, or zero if called from top level. */
	195
	196	void
	197	cp_print_value_fields (type, valaddr, stream, format, recurse, pretty,
	198	dont_print)
	199	struct type *type;
	200	char *valaddr;
	201	FILE *stream;
	202	int format;
	203	int recurse;
	204	enum val_prettyprint pretty;
	205	struct type **dont_print;
	206	{
	207	int i, len, n_baseclasses;
	208
	209	check_stub_type (type);
	210
	211	fprintf_filtered (stream, "{");
	212	len = TYPE_NFIELDS (type);
	213	n_baseclasses = TYPE_N_BASECLASSES (type);
	214
	215	/* Print out baseclasses such that we don't print
	216	duplicates of virtual baseclasses. */
	217	if (n_baseclasses > 0)
	218	cplus_print_value (type, valaddr, stream, format, recurse+1, pretty,
	219	dont_print);
	220
	221	if (!len && n_baseclasses == 1)
	222	fprintf_filtered (stream, "<No data fields>");
	223	else
	224	{
	225	extern int inspect_it;
	226	int fields_seen = 0;
	227
	228	for (i = n_baseclasses; i < len; i++)
	229	{
230	/* Check if static field */
231	if (TYPE_FIELD_STATIC (type, i))
232	continue;
233	if (fields_seen)
234	fprintf_filtered (stream, ", ");
235	else if (n_baseclasses > 0)
236	{
237	if (pretty)
238	{
239	fprintf_filtered (stream, "\n");
240	print_spaces_filtered (2 + 2 * recurse, stream);
241	fputs_filtered ("members of ", stream);
242	fputs_filtered (type_name_no_tag (type), stream);
243	fputs_filtered (": ", stream);
244	}
245	}
246	fields_seen = 1;
247
248	if (pretty)
249	{
250	fprintf_filtered (stream, "\n");
251	print_spaces_filtered (2 + 2 * recurse, stream);
252	}
253	else
254	{
255	wrap_here (n_spaces (2 + 2 * recurse));
256	}
257	if (inspect_it)
258	{
259	if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
260	fputs_filtered ("\"( ptr \"", stream);
261	else
262	fputs_filtered ("\"( nodef \"", stream);
5e81259d FF	263	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	264	language_cplus,
	265	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63	266	fputs_filtered ("\" \"", stream);
5e81259d FF	267	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	268	language_cplus,
	269	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63 FF	270	fputs_filtered ("\") \"", stream);
	271	}
	272	else
	273	{
5e81259d FF	274	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	275	language_cplus,
	276	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63 FF	277	fputs_filtered (" = ", stream);
	278	}
	279	if (TYPE_FIELD_PACKED (type, i))
	280	{
	281	value v;
	282
	283	/* Bitfields require special handling, especially due to byte
	284	order problems. */
	285	v = value_from_longest (TYPE_FIELD_TYPE (type, i),
	286	unpack_field_as_long (type, valaddr, i));
	287
	288	c_val_print (TYPE_FIELD_TYPE (type, i), VALUE_CONTENTS (v), 0,
	289	stream, format, 0, recurse + 1, pretty);
	290	}
	291	else
	292	{
	293	c_val_print (TYPE_FIELD_TYPE (type, i),
	294	valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
	295	0, stream, format, 0, recurse + 1, pretty);
	296	}
	297	}
	298	if (pretty)
	299	{
	300	fprintf_filtered (stream, "\n");
	301	print_spaces_filtered (2 * recurse, stream);
	302	}
	303	}
	304	fprintf_filtered (stream, "}");
	305	}
	306
	307	/* Special val_print routine to avoid printing multiple copies of virtual
	308	baseclasses. */
	309
	310	static void
	311	cplus_print_value (type, valaddr, stream, format, recurse, pretty, dont_print)
	312	struct type *type;
	313	char *valaddr;
	314	FILE *stream;
	315	int format;
	316	int recurse;
	317	enum val_prettyprint pretty;
	318	struct type **dont_print;
	319	{
	320	struct obstack tmp_obstack;
	321	struct type **last_dont_print
	322	= (struct type **)obstack_next_free (&dont_print_obstack);
	323	int i, n_baseclasses = TYPE_N_BASECLASSES (type);
	324
	325	if (dont_print == 0)
	326	{
	327	/* If we're at top level, carve out a completely fresh
	328	chunk of the obstack and use that until this particular
	329	invocation returns. */
	330	tmp_obstack = dont_print_obstack;
	331	/* Bump up the high-water mark. Now alpha is omega. */
	332	obstack_finish (&dont_print_obstack);
	333	}
	334
	335	for (i = 0; i < n_baseclasses; i++)
	336	{
	337	char *baddr;
	338	int err;
	339
	340	if (BASETYPE_VIA_VIRTUAL (type, i))
341	{
342	struct type **first_dont_print
343	= (struct type **)obstack_base (&dont_print_obstack);
344
345	int j = (struct type **)obstack_next_free (&dont_print_obstack)
346	- first_dont_print;
347
348	while (--j >= 0)
349	if (TYPE_BASECLASS (type, i) == first_dont_print[j])
350	goto flush_it;
351
352	obstack_ptr_grow (&dont_print_obstack, TYPE_BASECLASS (type, i));
353	}
354
355	/* Fix to use baseclass_offset instead. FIXME */
356	baddr = baseclass_addr (type, i, valaddr, 0, &err);
357	if (err == 0 && baddr == 0)
358	error ("could not find virtual baseclass `%s'\n",
359	type_name_no_tag (TYPE_BASECLASS (type, i)));
360
361	if (pretty)
362	{
363	fprintf_filtered (stream, "\n");
364	print_spaces_filtered (2 * recurse, stream);
365	}
366	fputs_filtered ("<", stream);
367	fputs_filtered (type_name_no_tag (TYPE_BASECLASS (type, i)), stream);
368	fputs_filtered ("> = ", stream);
369	if (err != 0)
370	fprintf_filtered (stream, "<invalid address 0x%x>", baddr);
371	else
372	cp_print_value_fields (TYPE_BASECLASS (type, i), baddr, stream, format,
373	recurse, pretty,
374	(struct type **) obstack_base (&dont_print_obstack));
375	fputs_filtered (", ", stream);
376
377	flush_it:
378	;
379	}
380
381	if (dont_print == 0)
382	{
383	/* Free the space used to deal with the printing
384	of this type from top level. */
385	obstack_free (&dont_print_obstack, last_dont_print);
386	/* Reset watermark so that we can continue protecting
387	ourselves from whatever we were protecting ourselves. */
388	dont_print_obstack = tmp_obstack;
389	}
390	}
391
392	void
393	cp_print_class_member (valaddr, domain, stream, prefix)
394	char *valaddr;
395	struct type *domain;
396	FILE *stream;
397	char *prefix;
398	{
399
400	/* VAL is a byte offset into the structure type DOMAIN.
401	Find the name of the field for that offset and
402	print it. */
403	int extra = 0;
404	int bits = 0;
405	register unsigned int i;
406	unsigned len = TYPE_NFIELDS (domain);
407	/* @@ Make VAL into bit offset */
408	LONGEST val = unpack_long (builtin_type_int, valaddr) << 3;
409	for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
410	{
411	int bitpos = TYPE_FIELD_BITPOS (domain, i);
412	QUIT;
413	if (val == bitpos)
414	break;
415	if (val < bitpos && i != 0)
416	{
417	/* Somehow pointing into a field. */
418	i -= 1;
419	extra = (val - TYPE_FIELD_BITPOS (domain, i));
420	if (extra & 0x7)
421	bits = 1;
422	else
423	extra >>= 3;
424	break;
425	}
426	}
427	if (i < len)
428	{
429	char *name;
430	fprintf_filtered (stream, prefix);
431	name = type_name_no_tag (domain);
432	if (name)
433	fputs_filtered (name, stream);
434	else
435	c_type_print_base (domain, stream, 0, 0);
436	fprintf_filtered (stream, "::");
437	fputs_filtered (TYPE_FIELD_NAME (domain, i), stream);
438	if (extra)
439	fprintf_filtered (stream, " + %d bytes", extra);
440	if (bits)
441	fprintf_filtered (stream, " (offset in bits)");
442	}
443	else
444	fprintf_filtered (stream, "%d", val >> 3);
445	}
446
447	void
448	_initialize_cp_valprint ()
449	{
450	add_show_from_set
451	(add_set_cmd ("vtbl", class_support, var_boolean, (char *)&vtblprint,
452	"Set printing of C++ virtual function tables.",
453	&setprintlist),
454	&showprintlist);
455
456	add_show_from_set
457	(add_set_cmd ("object", class_support, var_boolean, (char *)&objectprint,
458	"Set printing of object's derived type based on vtable info.",
459	&setprintlist),
460	&showprintlist);
461
462	/* Give people the defaults which they are used to. */
463	objectprint = 0;
464	vtblprint = 0;
465	obstack_begin (&dont_print_obstack, 32 * sizeof (struct type *));
466	}