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

/* Support for printing C++ values for GDB, the GNU debugger.
   Copyright 1986, 1988, 1989, 1991, 1994, 1995, 1996
   Free Software Foundation, Inc.

This file is part of GDB.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#include "defs.h"
#include "obstack.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "value.h"
#include "command.h"
#include "gdbcmd.h"
#include "demangle.h"
#include "annotate.h"
#include "gdb_string.h"
#include "c-lang.h"
#include "target.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.  */
static int static_field_print;	/* Controls printing of static fields. */

static struct obstack dont_print_vb_obstack;
static struct obstack dont_print_statmem_obstack;

static void
cp_print_static_field PARAMS ((struct type *, value_ptr, GDB_FILE *, int, int,
			       enum val_prettyprint));

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

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;
  struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));

  domain = TYPE_DOMAIN_TYPE (target_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] == '_'
	  && is_cplus_marker (TYPE_FN_FIELD_PHYSNAME (f, j)[1]))
	{
	  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);
    }
}

/* 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.  */
const char vtbl_ptr_name[] =
  { '_','_','v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };

/* 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);

  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);
      if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
	{
	  type = TYPE_TARGET_TYPE (type);
	  if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */
	      || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */
	    {
	      /* Virtual functions tables are full of pointers
		 to virtual functions. */
	      return cp_is_vtbl_ptr_type (type);
	    }
	}
    }
  return 0;
}

/* Mutually recursive subroutines of cp_print_value and c_val_print to
   print out a structure's fields: cp_print_value_fields and cp_print_value.
  
   TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
   same meanings as in cp_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, address, stream, format, recurse, pretty,
		       dont_print_vb, dont_print_statmem)
     struct type *type;
     char *valaddr;
     CORE_ADDR address;
     GDB_FILE *stream;
     int format;
     int recurse;
     enum val_prettyprint pretty;
     struct type **dont_print_vb;
     int dont_print_statmem;
{
  int i, len, n_baseclasses;
  struct obstack tmp_obstack;
  char *last_dont_print = obstack_next_free (&dont_print_statmem_obstack);

  CHECK_TYPEDEF (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)
    cp_print_value (type, valaddr, address, stream,
		    format, recurse+1, pretty, dont_print_vb);

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

      if (dont_print_statmem == 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_statmem_obstack;
	  obstack_finish (&dont_print_statmem_obstack);
	}

      for (i = n_baseclasses; i < len; i++)
	{
	  /* If requested, skip printing of static fields.  */
	  if (!static_field_print && 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);
	      if (TYPE_FIELD_STATIC (type, i))
		fputs_filtered ("static ", 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
	    {
	      annotate_field_begin (TYPE_FIELD_TYPE (type, i));

	      if (TYPE_FIELD_STATIC (type, i))
		fputs_filtered ("static ", stream);
	      fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
				       language_cplus,
				       DMGL_PARAMS | DMGL_ANSI);
	      annotate_field_name_end ();
	      fputs_filtered (" = ", stream);
	      annotate_field_value ();
	    }

	  if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
	    {
	      value_ptr 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 if (TYPE_FIELD_STATIC (type, i))
		{
		  value_ptr v;
		  char *phys_name = TYPE_FIELD_STATIC_PHYSNAME (type, i);
		  struct symbol *sym =
		      lookup_symbol (phys_name, 0, VAR_NAMESPACE, 0, NULL);
		  if (sym == NULL)
		    fputs_filtered ("<optimized out>", stream);
		  else
		    {
		      v = value_at (TYPE_FIELD_TYPE (type, i),
				    (CORE_ADDR)SYMBOL_BLOCK_VALUE (sym));
		      cp_print_static_field (TYPE_FIELD_TYPE (type, i), v,
					     stream, format, recurse + 1,
					     pretty);
		    }
		}
	      else
		{
	           val_print (TYPE_FIELD_TYPE (type, i), 
			      valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
			      address + TYPE_FIELD_BITPOS (type, i) / 8,
			      stream, format, 0, recurse + 1, pretty);
		}
	    }
	  annotate_field_end ();
	}

      if (dont_print_statmem == 0)
	{
	  /* Free the space used to deal with the printing
	     of the members from top level.  */
	  obstack_free (&dont_print_statmem_obstack, last_dont_print);
	  dont_print_statmem_obstack = tmp_obstack;
	}

      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
cp_print_value (type, valaddr, address, stream, format, recurse, pretty,
		dont_print_vb)
     struct type *type;
     char *valaddr;
     CORE_ADDR address;
     GDB_FILE *stream;
     int format;
     int recurse;
     enum val_prettyprint pretty;
     struct type **dont_print_vb;
{
  struct obstack tmp_obstack;
  struct type **last_dont_print
    = (struct type **)obstack_next_free (&dont_print_vb_obstack);
  int i, n_baseclasses = TYPE_N_BASECLASSES (type);

  if (dont_print_vb == 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_vb_obstack;
      /* Bump up the high-water mark.  Now alpha is omega.  */
      obstack_finish (&dont_print_vb_obstack);
    }

  for (i = 0; i < n_baseclasses; i++)
    {
      int boffset;
      struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
      char *basename = TYPE_NAME (baseclass);
      char *base_valaddr;

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

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

	  while (--j >= 0)
	    if (baseclass == first_dont_print[j])
	      goto flush_it;

	  obstack_ptr_grow (&dont_print_vb_obstack, baseclass);
	}

      boffset = baseclass_offset (type, i , valaddr, address);

      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);

      /* The virtual base class pointer might have been clobbered by the
	 user program. Make sure that it still points to a valid memory
	 location.  */

      if (boffset != -1 && (boffset < 0 || boffset >= TYPE_LENGTH (type)))
	{
	  base_valaddr = (char *) alloca (TYPE_LENGTH (baseclass));
	  if (target_read_memory (address + boffset, base_valaddr,
				  TYPE_LENGTH (baseclass)) != 0)
	    boffset = -1;
	}
      else
	base_valaddr = valaddr + boffset;

      if (boffset == -1)
	fprintf_filtered (stream, "<invalid address>");
      else
	cp_print_value_fields (baseclass, base_valaddr, address + boffset,
			       stream, format, recurse, pretty,
			       (struct type **) obstack_base (&dont_print_vb_obstack),
			       0);
      fputs_filtered (", ", stream);

    flush_it:
      ;
    }

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

/* Print value of a static member.
   To avoid infinite recursion when printing a class that contains
   a static instance of the class, we keep the addresses of all printed
   static member classes in an obstack and refuse to print them more
   than once.

   VAL contains the value to print, TYPE, STREAM, RECURSE, and PRETTY
   have the same meanings as in c_val_print.  */

static void
cp_print_static_field (type, val, stream, format, recurse, pretty)
     struct type *type;
     value_ptr val;
     GDB_FILE *stream;
     int format;
     int recurse;
     enum val_prettyprint pretty;
{
  if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
    {
      CORE_ADDR *first_dont_print;
      int i;

      first_dont_print
	= (CORE_ADDR *)obstack_base (&dont_print_statmem_obstack);
      i = (CORE_ADDR *)obstack_next_free (&dont_print_statmem_obstack)
	- first_dont_print;

      while (--i >= 0)
	{
	  if (VALUE_ADDRESS (val) == first_dont_print[i])
	    {
	      fputs_filtered ("<same as static member of an already seen type>",
			      stream);
	      return;
	    }
	}

      obstack_grow (&dont_print_statmem_obstack, (char *) &VALUE_ADDRESS (val),
		    sizeof (CORE_ADDR));

      CHECK_TYPEDEF (type);
      cp_print_value_fields (type, VALUE_CONTENTS (val), VALUE_ADDRESS (val),
			     stream, format, recurse, pretty, NULL, 1);
      return;
    }
  val_print (type, VALUE_CONTENTS (val), VALUE_ADDRESS (val),
	     stream, format, 0, recurse, pretty);
}

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 ("static-members", class_support, var_boolean,
		  (char *)&static_field_print,
		  "Set printing of C++ static members.",
		  &setprintlist),
     &showprintlist);
  /* Turn on printing of static fields.  */
  static_field_print = 1;

  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_vb_obstack, 32 * sizeof (struct type *));
  obstack_specify_allocation (&dont_print_statmem_obstack,
			      32 * sizeof (CORE_ADDR), sizeof (CORE_ADDR),
			      xmalloc, free);
}
Commit	Line	Data
a8a69e63	1	/* Support for printing C++ values for GDB, the GNU debugger.
81afee37	2	Copyright 1986, 1988, 1989, 1991, 1994, 1995, 1996
a1a0d974	3	Free Software Foundation, Inc.
a8a69e63 FF	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
6c9638b4	19	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
a8a69e63 FF	20
	21	#include "defs.h"
	22	#include "obstack.h"
	23	#include "symtab.h"
	24	#include "gdbtypes.h"
	25	#include "expression.h"
	26	#include "value.h"
	27	#include "command.h"
	28	#include "gdbcmd.h"
5e81259d	29	#include "demangle.h"
1c95d7ab	30	#include "annotate.h"
2b576293	31	#include "gdb_string.h"
5e548861	32	#include "c-lang.h"
074d813d	33	#include "target.h"
a8a69e63 FF	34
	35	int vtblprint; /* Controls printing of vtbl's */
	36	int objectprint; /* Controls looking up an object's derived type
	37	using what we find in its vtables. */
4c664b8d	38	static int static_field_print; /* Controls printing of static fields. */
a1a0d974 PS	39
	40	static struct obstack dont_print_vb_obstack;
	41	static struct obstack dont_print_statmem_obstack;
	42
	43	static void
	44	cp_print_static_field PARAMS ((struct type , value_ptr, GDB_FILE , int, int,
	45	enum val_prettyprint));
a8a69e63 FF	46
a8a69e63 FF	47	static void
5e548861 PB	48	cp_print_value PARAMS ((struct type , char , CORE_ADDR, GDB_FILE *,
5e548861 PB	49	int, int, enum val_prettyprint, struct type **));
a8a69e63	50
c7da3ed3 FF	51	void
	52	cp_print_class_method (valaddr, type, stream)
	53	char *valaddr;
	54	struct type *type;
199b2450	55	GDB_FILE *stream;
c7da3ed3 FF	56	{
c7da3ed3 FF	57	struct type *domain;
72cd0384 RP	58	struct fn_field *f = NULL;
72cd0384 RP	59	int j = 0;
c7da3ed3 FF	60	int len2;
	61	int offset;
	62	char *kind = "";
	63	CORE_ADDR addr;
	64	struct symbol *sym;
	65	unsigned len;
	66	unsigned int i;
5e548861	67	struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
c7da3ed3	68
5e548861	69	domain = TYPE_DOMAIN_TYPE (target_type);
30d20d15 PS	70	if (domain == (struct type *)NULL)
	71	{
	72	fprintf_filtered (stream, "<unknown>");
	73	return;
	74	}
c7da3ed3 FF	75	addr = unpack_pointer (lookup_pointer_type (builtin_type_void), valaddr);
	76	if (METHOD_PTR_IS_VIRTUAL (addr))
	77	{
	78	offset = METHOD_PTR_TO_VOFFSET (addr);
	79	len = TYPE_NFN_FIELDS (domain);
	80	for (i = 0; i < len; i++)
	81	{
	82	f = TYPE_FN_FIELDLIST1 (domain, i);
	83	len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	84
	85	for (j = 0; j < len2; j++)
	86	{
	87	QUIT;
	88	if (TYPE_FN_FIELD_VOFFSET (f, j) == offset)
	89	{
	90	kind = "virtual ";
	91	goto common;
	92	}
	93	}
	94	}
	95	}
	96	else
	97	{
	98	sym = find_pc_function (addr);
	99	if (sym == 0)
	100	{
	101	error ("invalid pointer to member function");
	102	}
	103	len = TYPE_NFN_FIELDS (domain);
	104	for (i = 0; i < len; i++)
	105	{
	106	f = TYPE_FN_FIELDLIST1 (domain, i);
	107	len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	108
	109	for (j = 0; j < len2; j++)
	110	{
	111	QUIT;
39cb3d04 PS	112	if (TYPE_FN_FIELD_STUB (f, j))
39cb3d04 PS	113	check_stub_method (domain, i, j);
c7da3ed3 FF	114	if (STREQ (SYMBOL_NAME (sym), TYPE_FN_FIELD_PHYSNAME (f, j)))
	115	{
	116	goto common;
	117	}
	118	}
	119	}
	120	}
	121	common:
	122	if (i < len)
	123	{
	124	fprintf_filtered (stream, "&");
	125	c_type_print_varspec_prefix (TYPE_FN_FIELD_TYPE (f, j), stream, 0, 0);
199b2450	126	fprintf_unfiltered (stream, kind);
c7da3ed3	127	if (TYPE_FN_FIELD_PHYSNAME (f, j)[0] == '_'
81afee37	128	&& is_cplus_marker (TYPE_FN_FIELD_PHYSNAME (f, j)[1]))
c7da3ed3 FF	129	{
	130	cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j) + 1, "~",
	131	TYPE_FN_FIELDLIST_NAME (domain, i),
	132	0, stream);
	133	}
	134	else
	135	{
	136	cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j), "",
	137	TYPE_FN_FIELDLIST_NAME (domain, i),
	138	0, stream);
	139	}
	140	}
	141	else
	142	{
	143	fprintf_filtered (stream, "(");
	144	type_print (type, "", stream, -1);
	145	fprintf_filtered (stream, ") %d", (int) addr >> 3);
	146	}
	147	}
	148
36a2283d PB	149	/* This was what it was for gcc 2.4.5 and earlier. */
	150	static const char vtbl_ptr_name_old[] =
	151	{ CPLUS_MARKER,'v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };
	152	/* It was changed to this after 2.4.5. */
	153	const char vtbl_ptr_name[] =
	154	{ '_','_','v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };
	155
a8a69e63 FF	156	/* Return truth value for assertion that TYPE is of the type
	157	"pointer to virtual function". */
	158
	159	int
	160	cp_is_vtbl_ptr_type(type)
	161	struct type *type;
	162	{
	163	char *typename = type_name_no_tag (type);
a8a69e63	164
8f341c15 JK	165	return (typename != NULL
	166	&& (STREQ (typename, vtbl_ptr_name)
	167	\|\| STREQ (typename, vtbl_ptr_name_old)));
a8a69e63 FF	168	}
	169
	170	/* Return truth value for the assertion that TYPE is of the type
	171	"pointer to virtual function table". */
	172
	173	int
	174	cp_is_vtbl_member(type)
	175	struct type *type;
	176	{
	177	if (TYPE_CODE (type) == TYPE_CODE_PTR)
36a2283d PB	178	{
	179	type = TYPE_TARGET_TYPE (type);
	180	if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
	181	{
	182	type = TYPE_TARGET_TYPE (type);
	183	if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */
	184	\|\| TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */
	185	{
	186	/* Virtual functions tables are full of pointers
	187	to virtual functions. */
	188	return cp_is_vtbl_ptr_type (type);
	189	}
	190	}
	191	}
a8a69e63 FF	192	return 0;
	193	}
	194
5e548861 PB	195	/* Mutually recursive subroutines of cp_print_value and c_val_print to
	196	print out a structure's fields: cp_print_value_fields and cp_print_value.
	197
	198	TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
	199	same meanings as in cp_print_value and c_val_print.
a8a69e63 FF	200
	201	DONT_PRINT is an array of baseclass types that we
	202	should not print, or zero if called from top level. */
	203
	204	void
5e548861	205	cp_print_value_fields (type, valaddr, address, stream, format, recurse, pretty,
a1a0d974	206	dont_print_vb, dont_print_statmem)
a8a69e63 FF	207	struct type *type;
a8a69e63 FF	208	char *valaddr;
5e548861	209	CORE_ADDR address;
199b2450	210	GDB_FILE *stream;
a8a69e63 FF	211	int format;
	212	int recurse;
	213	enum val_prettyprint pretty;
a1a0d974 PS	214	struct type **dont_print_vb;
a1a0d974 PS	215	int dont_print_statmem;
a8a69e63 FF	216	{
a8a69e63 FF	217	int i, len, n_baseclasses;
a1a0d974 PS	218	struct obstack tmp_obstack;
a1a0d974 PS	219	char *last_dont_print = obstack_next_free (&dont_print_statmem_obstack);
a8a69e63	220
5e548861	221	CHECK_TYPEDEF (type);
a8a69e63 FF	222
	223	fprintf_filtered (stream, "{");
	224	len = TYPE_NFIELDS (type);
	225	n_baseclasses = TYPE_N_BASECLASSES (type);
	226
	227	/* Print out baseclasses such that we don't print
	228	duplicates of virtual baseclasses. */
	229	if (n_baseclasses > 0)
5e548861 PB	230	cp_print_value (type, valaddr, address, stream,
5e548861 PB	231	format, recurse+1, pretty, dont_print_vb);
a8a69e63 FF	232
	233	if (!len && n_baseclasses == 1)
	234	fprintf_filtered (stream, "<No data fields>");
	235	else
	236	{
	237	extern int inspect_it;
	238	int fields_seen = 0;
	239
a1a0d974 PS	240	if (dont_print_statmem == 0)
	241	{
	242	/* If we're at top level, carve out a completely fresh
	243	chunk of the obstack and use that until this particular
	244	invocation returns. */
	245	tmp_obstack = dont_print_statmem_obstack;
	246	obstack_finish (&dont_print_statmem_obstack);
	247	}
	248
a8a69e63 FF	249	for (i = n_baseclasses; i < len; i++)
a8a69e63 FF	250	{
4c664b8d PS	251	/* If requested, skip printing of static fields. */
4c664b8d PS	252	if (!static_field_print && TYPE_FIELD_STATIC (type, i))
a8a69e63 FF	253	continue;
	254	if (fields_seen)
	255	fprintf_filtered (stream, ", ");
	256	else if (n_baseclasses > 0)
	257	{
	258	if (pretty)
	259	{
	260	fprintf_filtered (stream, "\n");
	261	print_spaces_filtered (2 + 2 * recurse, stream);
	262	fputs_filtered ("members of ", stream);
	263	fputs_filtered (type_name_no_tag (type), stream);
	264	fputs_filtered (": ", stream);
	265	}
	266	}
	267	fields_seen = 1;
	268
	269	if (pretty)
	270	{
	271	fprintf_filtered (stream, "\n");
	272	print_spaces_filtered (2 + 2 * recurse, stream);
	273	}
	274	else
	275	{
	276	wrap_here (n_spaces (2 + 2 * recurse));
	277	}
	278	if (inspect_it)
	279	{
	280	if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
	281	fputs_filtered ("\"( ptr \"", stream);
	282	else
	283	fputs_filtered ("\"( nodef \"", stream);
4c664b8d PS	284	if (TYPE_FIELD_STATIC (type, i))
4c664b8d PS	285	fputs_filtered ("static ", stream);
5e81259d FF	286	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	287	language_cplus,
	288	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63	289	fputs_filtered ("\" \"", stream);
5e81259d FF	290	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	291	language_cplus,
	292	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63 FF	293	fputs_filtered ("\") \"", stream);
	294	}
	295	else
	296	{
1c95d7ab	297	annotate_field_begin (TYPE_FIELD_TYPE (type, i));
da988c20	298
4c664b8d PS	299	if (TYPE_FIELD_STATIC (type, i))
4c664b8d PS	300	fputs_filtered ("static ", stream);
5e81259d FF	301	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	302	language_cplus,
	303	DMGL_PARAMS \| DMGL_ANSI);
1c95d7ab	304	annotate_field_name_end ();
a8a69e63	305	fputs_filtered (" = ", stream);
1c95d7ab	306	annotate_field_value ();
96f7edbd JK	307	}
96f7edbd JK	308
4c664b8d	309	if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
a8a69e63	310	{
82a2edfb	311	value_ptr v;
a8a69e63 FF	312
	313	/* Bitfields require special handling, especially due to byte
	314	order problems. */
024f65b1 KH	315	if (TYPE_FIELD_IGNORE (type, i))
024f65b1 KH	316	{
aa074e84	317	fputs_filtered ("<optimized out or zero length>", stream);
024f65b1 KH	318	}
	319	else
	320	{
	321	v = value_from_longest (TYPE_FIELD_TYPE (type, i),
a8a69e63 FF	322	unpack_field_as_long (type, valaddr, i));
a8a69e63 FF	323
dda398c3 JK	324	val_print (TYPE_FIELD_TYPE(type, i), VALUE_CONTENTS (v), 0,
dda398c3 JK	325	stream, format, 0, recurse + 1, pretty);
024f65b1	326	}
a8a69e63 FF	327	}
	328	else
	329	{
024f65b1 KH	330	if (TYPE_FIELD_IGNORE (type, i))
024f65b1 KH	331	{
aa074e84	332	fputs_filtered ("<optimized out or zero length>", stream);
024f65b1	333	}
4c664b8d PS	334	else if (TYPE_FIELD_STATIC (type, i))
	335	{
	336	value_ptr v;
	337	char *phys_name = TYPE_FIELD_STATIC_PHYSNAME (type, i);
	338	struct symbol *sym =
	339	lookup_symbol (phys_name, 0, VAR_NAMESPACE, 0, NULL);
	340	if (sym == NULL)
	341	fputs_filtered ("<optimized out>", stream);
	342	else
	343	{
	344	v = value_at (TYPE_FIELD_TYPE (type, i),
	345	(CORE_ADDR)SYMBOL_BLOCK_VALUE (sym));
a1a0d974 PS	346	cp_print_static_field (TYPE_FIELD_TYPE (type, i), v,
	347	stream, format, recurse + 1,
	348	pretty);
4c664b8d PS	349	}
4c664b8d PS	350	}
024f65b1 KH	351	else
024f65b1 KH	352	{
dda398c3 JK	353	val_print (TYPE_FIELD_TYPE (type, i),
dda398c3 JK	354	valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
972256e7 PS	355	address + TYPE_FIELD_BITPOS (type, i) / 8,
972256e7 PS	356	stream, format, 0, recurse + 1, pretty);
024f65b1	357	}
a8a69e63	358	}
1c95d7ab	359	annotate_field_end ();
a8a69e63	360	}
96f7edbd	361
a1a0d974 PS	362	if (dont_print_statmem == 0)
	363	{
	364	/* Free the space used to deal with the printing
	365	of the members from top level. */
	366	obstack_free (&dont_print_statmem_obstack, last_dont_print);
	367	dont_print_statmem_obstack = tmp_obstack;
	368	}
	369
a8a69e63 FF	370	if (pretty)
	371	{
	372	fprintf_filtered (stream, "\n");
	373	print_spaces_filtered (2 * recurse, stream);
	374	}
	375	}
	376	fprintf_filtered (stream, "}");
	377	}
	378
	379	/* Special val_print routine to avoid printing multiple copies of virtual
	380	baseclasses. */
	381
	382	static void
5e548861 PB	383	cp_print_value (type, valaddr, address, stream, format, recurse, pretty,
5e548861 PB	384	dont_print_vb)
a8a69e63 FF	385	struct type *type;
a8a69e63 FF	386	char *valaddr;
5e548861	387	CORE_ADDR address;
199b2450	388	GDB_FILE *stream;
a8a69e63 FF	389	int format;
	390	int recurse;
	391	enum val_prettyprint pretty;
a1a0d974	392	struct type **dont_print_vb;
a8a69e63 FF	393	{
	394	struct obstack tmp_obstack;
	395	struct type **last_dont_print
a1a0d974	396	= (struct type **)obstack_next_free (&dont_print_vb_obstack);
a8a69e63 FF	397	int i, n_baseclasses = TYPE_N_BASECLASSES (type);
a8a69e63 FF	398
a1a0d974	399	if (dont_print_vb == 0)
a8a69e63 FF	400	{
	401	/* If we're at top level, carve out a completely fresh
	402	chunk of the obstack and use that until this particular
	403	invocation returns. */
a1a0d974	404	tmp_obstack = dont_print_vb_obstack;
a8a69e63	405	/* Bump up the high-water mark. Now alpha is omega. */
a1a0d974	406	obstack_finish (&dont_print_vb_obstack);
a8a69e63 FF	407	}
	408
	409	for (i = 0; i < n_baseclasses; i++)
	410	{
5e548861 PB	411	int boffset;
	412	struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
	413	char *basename = TYPE_NAME (baseclass);
074d813d	414	char *base_valaddr;
a8a69e63 FF	415
	416	if (BASETYPE_VIA_VIRTUAL (type, i))
	417	{
	418	struct type **first_dont_print
a1a0d974	419	= (struct type **)obstack_base (&dont_print_vb_obstack);
a8a69e63	420
a1a0d974	421	int j = (struct type **)obstack_next_free (&dont_print_vb_obstack)
a8a69e63 FF	422	- first_dont_print;
	423
	424	while (--j >= 0)
5e548861	425	if (baseclass == first_dont_print[j])
a8a69e63 FF	426	goto flush_it;
a8a69e63 FF	427
5e548861	428	obstack_ptr_grow (&dont_print_vb_obstack, baseclass);
a8a69e63 FF	429	}
a8a69e63 FF	430
5e548861	431	boffset = baseclass_offset (type, i , valaddr, address);
a8a69e63 FF	432
	433	if (pretty)
	434	{
	435	fprintf_filtered (stream, "\n");
	436	print_spaces_filtered (2 * recurse, stream);
	437	}
	438	fputs_filtered ("<", stream);
1410f5f1 JK	439	/* Not sure what the best notation is in the case where there is no
	440	baseclass name. */
	441	fputs_filtered (basename ? basename : "", stream);
a8a69e63	442	fputs_filtered ("> = ", stream);
074d813d PS	443
	444	/* The virtual base class pointer might have been clobbered by the
	445	user program. Make sure that it still points to a valid memory
	446	location. */
	447
	448	if (boffset != -1 && (boffset < 0 \|\| boffset >= TYPE_LENGTH (type)))
	449	{
	450	base_valaddr = (char *) alloca (TYPE_LENGTH (baseclass));
	451	if (target_read_memory (address + boffset, base_valaddr,
	452	TYPE_LENGTH (baseclass)) != 0)
	453	boffset = -1;
	454	}
	455	else
	456	base_valaddr = valaddr + boffset;
	457
5e548861 PB	458	if (boffset == -1)
5e548861 PB	459	fprintf_filtered (stream, "<invalid address>");
a8a69e63	460	else
074d813d	461	cp_print_value_fields (baseclass, base_valaddr, address + boffset,
5e548861	462	stream, format, recurse, pretty,
a1a0d974 PS	463	(struct type **) obstack_base (&dont_print_vb_obstack),
a1a0d974 PS	464	0);
a8a69e63 FF	465	fputs_filtered (", ", stream);
	466
	467	flush_it:
	468	;
	469	}
	470
a1a0d974	471	if (dont_print_vb == 0)
a8a69e63 FF	472	{
	473	/* Free the space used to deal with the printing
	474	of this type from top level. */
a1a0d974	475	obstack_free (&dont_print_vb_obstack, last_dont_print);
a8a69e63 FF	476	/* Reset watermark so that we can continue protecting
a8a69e63 FF	477	ourselves from whatever we were protecting ourselves. */
a1a0d974 PS	478	dont_print_vb_obstack = tmp_obstack;
	479	}
	480	}
	481
	482	/* Print value of a static member.
	483	To avoid infinite recursion when printing a class that contains
	484	a static instance of the class, we keep the addresses of all printed
	485	static member classes in an obstack and refuse to print them more
	486	than once.
	487
	488	VAL contains the value to print, TYPE, STREAM, RECURSE, and PRETTY
	489	have the same meanings as in c_val_print. */
	490
	491	static void
	492	cp_print_static_field (type, val, stream, format, recurse, pretty)
	493	struct type *type;
	494	value_ptr val;
	495	GDB_FILE *stream;
	496	int format;
	497	int recurse;
	498	enum val_prettyprint pretty;
	499	{
	500	if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
	501	{
	502	CORE_ADDR *first_dont_print;
	503	int i;
	504
	505	first_dont_print
	506	= (CORE_ADDR *)obstack_base (&dont_print_statmem_obstack);
	507	i = (CORE_ADDR *)obstack_next_free (&dont_print_statmem_obstack)
	508	- first_dont_print;
	509
	510	while (--i >= 0)
	511	{
	512	if (VALUE_ADDRESS (val) == first_dont_print[i])
	513	{
	514	fputs_filtered ("<same as static member of an already seen type>",
	515	stream);
	516	return;
	517	}
	518	}
	519
5579919f	520	obstack_grow (&dont_print_statmem_obstack, (char *) &VALUE_ADDRESS (val),
a1a0d974 PS	521	sizeof (CORE_ADDR));
a1a0d974 PS	522
5e548861 PB	523	CHECK_TYPEDEF (type);
	524	cp_print_value_fields (type, VALUE_CONTENTS (val), VALUE_ADDRESS (val),
	525	stream, format, recurse, pretty, NULL, 1);
a1a0d974	526	return;
a8a69e63	527	}
a1a0d974 PS	528	val_print (type, VALUE_CONTENTS (val), VALUE_ADDRESS (val),
a1a0d974 PS	529	stream, format, 0, recurse, pretty);
a8a69e63 FF	530	}
	531
	532	void
	533	cp_print_class_member (valaddr, domain, stream, prefix)
	534	char *valaddr;
	535	struct type *domain;
199b2450	536	GDB_FILE *stream;
a8a69e63 FF	537	char *prefix;
	538	{
	539
	540	/* VAL is a byte offset into the structure type DOMAIN.
	541	Find the name of the field for that offset and
	542	print it. */
	543	int extra = 0;
	544	int bits = 0;
	545	register unsigned int i;
	546	unsigned len = TYPE_NFIELDS (domain);
	547	/* @@ Make VAL into bit offset */
	548	LONGEST val = unpack_long (builtin_type_int, valaddr) << 3;
	549	for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
	550	{
	551	int bitpos = TYPE_FIELD_BITPOS (domain, i);
	552	QUIT;
	553	if (val == bitpos)
	554	break;
	555	if (val < bitpos && i != 0)
	556	{
	557	/* Somehow pointing into a field. */
	558	i -= 1;
	559	extra = (val - TYPE_FIELD_BITPOS (domain, i));
	560	if (extra & 0x7)
	561	bits = 1;
	562	else
	563	extra >>= 3;
	564	break;
	565	}
	566	}
	567	if (i < len)
	568	{
	569	char *name;
	570	fprintf_filtered (stream, prefix);
	571	name = type_name_no_tag (domain);
	572	if (name)
	573	fputs_filtered (name, stream);
	574	else
	575	c_type_print_base (domain, stream, 0, 0);
	576	fprintf_filtered (stream, "::");
	577	fputs_filtered (TYPE_FIELD_NAME (domain, i), stream);
	578	if (extra)
	579	fprintf_filtered (stream, " + %d bytes", extra);
	580	if (bits)
	581	fprintf_filtered (stream, " (offset in bits)");
	582	}
	583	else
	584	fprintf_filtered (stream, "%d", val >> 3);
	585	}
	586
	587	void
	588	_initialize_cp_valprint ()
	589	{
4c664b8d PS	590	add_show_from_set
	591	(add_set_cmd ("static-members", class_support, var_boolean,
	592	(char *)&static_field_print,
	593	"Set printing of C++ static members.",
	594	&setprintlist),
	595	&showprintlist);
	596	/* Turn on printing of static fields. */
	597	static_field_print = 1;
	598
a8a69e63 FF	599	add_show_from_set
	600	(add_set_cmd ("vtbl", class_support, var_boolean, (char *)&vtblprint,
	601	"Set printing of C++ virtual function tables.",
	602	&setprintlist),
	603	&showprintlist);
	604
	605	add_show_from_set
	606	(add_set_cmd ("object", class_support, var_boolean, (char *)&objectprint,
	607	"Set printing of object's derived type based on vtable info.",
	608	&setprintlist),
	609	&showprintlist);
	610
	611	/* Give people the defaults which they are used to. */
	612	objectprint = 0;
	613	vtblprint = 0;
a1a0d974 PS	614	obstack_begin (&dont_print_vb_obstack, 32 * sizeof (struct type *));
	615	obstack_specify_allocation (&dont_print_statmem_obstack,
	616	32 * sizeof (CORE_ADDR), sizeof (CORE_ADDR),
	617	xmalloc, free);
a8a69e63	618	}