[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"

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);

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