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

/* Support for printing C++ values for GDB, the GNU debugger.
   Copyright 1986, 1988, 1989, 1991, 1994, 1995
   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] == '_'
	  && 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);
    }
}

/* 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,
			      0, 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, &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.
a1a0d974 PS	2	Copyright 1986, 1988, 1989, 1991, 1994, 1995
a1a0d974 PS	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 FF	126	if (TYPE_FN_FIELD_PHYSNAME (f, j)[0] == '_'
	127	&& TYPE_FN_FIELD_PHYSNAME (f, j)[1] == CPLUS_MARKER)
	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),
	353	valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
	354	0, stream, format, 0, recurse + 1, pretty);
024f65b1	355	}
a8a69e63	356	}
1c95d7ab	357	annotate_field_end ();
a8a69e63	358	}
96f7edbd	359
a1a0d974 PS	360	if (dont_print_statmem == 0)
	361	{
	362	/* Free the space used to deal with the printing
	363	of the members from top level. */
	364	obstack_free (&dont_print_statmem_obstack, last_dont_print);
	365	dont_print_statmem_obstack = tmp_obstack;
	366	}
	367
a8a69e63 FF	368	if (pretty)
	369	{
	370	fprintf_filtered (stream, "\n");
	371	print_spaces_filtered (2 * recurse, stream);
	372	}
	373	}
	374	fprintf_filtered (stream, "}");
	375	}
	376
	377	/* Special val_print routine to avoid printing multiple copies of virtual
	378	baseclasses. */
	379
	380	static void
5e548861 PB	381	cp_print_value (type, valaddr, address, stream, format, recurse, pretty,
5e548861 PB	382	dont_print_vb)
a8a69e63 FF	383	struct type *type;
a8a69e63 FF	384	char *valaddr;
5e548861	385	CORE_ADDR address;
199b2450	386	GDB_FILE *stream;
a8a69e63 FF	387	int format;
	388	int recurse;
	389	enum val_prettyprint pretty;
a1a0d974	390	struct type **dont_print_vb;
a8a69e63 FF	391	{
	392	struct obstack tmp_obstack;
	393	struct type **last_dont_print
a1a0d974	394	= (struct type **)obstack_next_free (&dont_print_vb_obstack);
a8a69e63 FF	395	int i, n_baseclasses = TYPE_N_BASECLASSES (type);
a8a69e63 FF	396
a1a0d974	397	if (dont_print_vb == 0)
a8a69e63 FF	398	{
	399	/* If we're at top level, carve out a completely fresh
	400	chunk of the obstack and use that until this particular
	401	invocation returns. */
a1a0d974	402	tmp_obstack = dont_print_vb_obstack;
a8a69e63	403	/* Bump up the high-water mark. Now alpha is omega. */
a1a0d974	404	obstack_finish (&dont_print_vb_obstack);
a8a69e63 FF	405	}
	406
	407	for (i = 0; i < n_baseclasses; i++)
	408	{
5e548861 PB	409	int boffset;
	410	struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
	411	char *basename = TYPE_NAME (baseclass);
a8a69e63 FF	412
	413	if (BASETYPE_VIA_VIRTUAL (type, i))
	414	{
	415	struct type **first_dont_print
a1a0d974	416	= (struct type **)obstack_base (&dont_print_vb_obstack);
a8a69e63	417
a1a0d974	418	int j = (struct type **)obstack_next_free (&dont_print_vb_obstack)
a8a69e63 FF	419	- first_dont_print;
	420
	421	while (--j >= 0)
5e548861	422	if (baseclass == first_dont_print[j])
a8a69e63 FF	423	goto flush_it;
a8a69e63 FF	424
5e548861	425	obstack_ptr_grow (&dont_print_vb_obstack, baseclass);
a8a69e63 FF	426	}
a8a69e63 FF	427
5e548861	428	boffset = baseclass_offset (type, i , valaddr, address);
a8a69e63 FF	429
	430	if (pretty)
	431	{
	432	fprintf_filtered (stream, "\n");
	433	print_spaces_filtered (2 * recurse, stream);
	434	}
	435	fputs_filtered ("<", stream);
1410f5f1 JK	436	/* Not sure what the best notation is in the case where there is no
	437	baseclass name. */
	438	fputs_filtered (basename ? basename : "", stream);
a8a69e63	439	fputs_filtered ("> = ", stream);
5e548861 PB	440	if (boffset == -1)
5e548861 PB	441	fprintf_filtered (stream, "<invalid address>");
a8a69e63	442	else
5e548861 PB	443	cp_print_value_fields (baseclass, valaddr + boffset, address + boffset,
5e548861 PB	444	stream, format, recurse, pretty,
a1a0d974 PS	445	(struct type **) obstack_base (&dont_print_vb_obstack),
a1a0d974 PS	446	0);
a8a69e63 FF	447	fputs_filtered (", ", stream);
	448
	449	flush_it:
	450	;
	451	}
	452
a1a0d974	453	if (dont_print_vb == 0)
a8a69e63 FF	454	{
	455	/* Free the space used to deal with the printing
	456	of this type from top level. */
a1a0d974	457	obstack_free (&dont_print_vb_obstack, last_dont_print);
a8a69e63 FF	458	/* Reset watermark so that we can continue protecting
a8a69e63 FF	459	ourselves from whatever we were protecting ourselves. */
a1a0d974 PS	460	dont_print_vb_obstack = tmp_obstack;
	461	}
	462	}
	463
	464	/* Print value of a static member.
	465	To avoid infinite recursion when printing a class that contains
	466	a static instance of the class, we keep the addresses of all printed
	467	static member classes in an obstack and refuse to print them more
	468	than once.
	469
	470	VAL contains the value to print, TYPE, STREAM, RECURSE, and PRETTY
	471	have the same meanings as in c_val_print. */
	472
	473	static void
	474	cp_print_static_field (type, val, stream, format, recurse, pretty)
	475	struct type *type;
	476	value_ptr val;
	477	GDB_FILE *stream;
	478	int format;
	479	int recurse;
	480	enum val_prettyprint pretty;
	481	{
	482	if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
	483	{
	484	CORE_ADDR *first_dont_print;
	485	int i;
	486
	487	first_dont_print
	488	= (CORE_ADDR *)obstack_base (&dont_print_statmem_obstack);
	489	i = (CORE_ADDR *)obstack_next_free (&dont_print_statmem_obstack)
	490	- first_dont_print;
	491
	492	while (--i >= 0)
	493	{
	494	if (VALUE_ADDRESS (val) == first_dont_print[i])
	495	{
	496	fputs_filtered ("<same as static member of an already seen type>",
	497	stream);
	498	return;
	499	}
	500	}
	501
	502	obstack_grow (&dont_print_statmem_obstack, &VALUE_ADDRESS (val),
	503	sizeof (CORE_ADDR));
	504
5e548861 PB	505	CHECK_TYPEDEF (type);
	506	cp_print_value_fields (type, VALUE_CONTENTS (val), VALUE_ADDRESS (val),
	507	stream, format, recurse, pretty, NULL, 1);
a1a0d974	508	return;
a8a69e63	509	}
a1a0d974 PS	510	val_print (type, VALUE_CONTENTS (val), VALUE_ADDRESS (val),
a1a0d974 PS	511	stream, format, 0, recurse, pretty);
a8a69e63 FF	512	}
	513
	514	void
	515	cp_print_class_member (valaddr, domain, stream, prefix)
	516	char *valaddr;
	517	struct type *domain;
199b2450	518	GDB_FILE *stream;
a8a69e63 FF	519	char *prefix;
	520	{
	521
	522	/* VAL is a byte offset into the structure type DOMAIN.
	523	Find the name of the field for that offset and
	524	print it. */
	525	int extra = 0;
	526	int bits = 0;
	527	register unsigned int i;
	528	unsigned len = TYPE_NFIELDS (domain);
	529	/* @@ Make VAL into bit offset */
	530	LONGEST val = unpack_long (builtin_type_int, valaddr) << 3;
	531	for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
	532	{
	533	int bitpos = TYPE_FIELD_BITPOS (domain, i);
	534	QUIT;
	535	if (val == bitpos)
	536	break;
	537	if (val < bitpos && i != 0)
	538	{
	539	/* Somehow pointing into a field. */
	540	i -= 1;
	541	extra = (val - TYPE_FIELD_BITPOS (domain, i));
	542	if (extra & 0x7)
	543	bits = 1;
	544	else
	545	extra >>= 3;
	546	break;
	547	}
	548	}
	549	if (i < len)
	550	{
	551	char *name;
	552	fprintf_filtered (stream, prefix);
	553	name = type_name_no_tag (domain);
	554	if (name)
	555	fputs_filtered (name, stream);
	556	else
	557	c_type_print_base (domain, stream, 0, 0);
	558	fprintf_filtered (stream, "::");
	559	fputs_filtered (TYPE_FIELD_NAME (domain, i), stream);
	560	if (extra)
	561	fprintf_filtered (stream, " + %d bytes", extra);
	562	if (bits)
	563	fprintf_filtered (stream, " (offset in bits)");
	564	}
	565	else
	566	fprintf_filtered (stream, "%d", val >> 3);
	567	}
	568
	569	void
	570	_initialize_cp_valprint ()
	571	{
4c664b8d PS	572	add_show_from_set
	573	(add_set_cmd ("static-members", class_support, var_boolean,
	574	(char *)&static_field_print,
	575	"Set printing of C++ static members.",
	576	&setprintlist),
	577	&showprintlist);
	578	/* Turn on printing of static fields. */
	579	static_field_print = 1;
	580
a8a69e63 FF	581	add_show_from_set
	582	(add_set_cmd ("vtbl", class_support, var_boolean, (char *)&vtblprint,
	583	"Set printing of C++ virtual function tables.",
	584	&setprintlist),
	585	&showprintlist);
	586
	587	add_show_from_set
	588	(add_set_cmd ("object", class_support, var_boolean, (char *)&objectprint,
	589	"Set printing of object's derived type based on vtable info.",
	590	&setprintlist),
	591	&showprintlist);
	592
	593	/* Give people the defaults which they are used to. */
	594	objectprint = 0;
	595	vtblprint = 0;
a1a0d974 PS	596	obstack_begin (&dont_print_vb_obstack, 32 * sizeof (struct type *));
	597	obstack_specify_allocation (&dont_print_statmem_obstack,
	598	32 * sizeof (CORE_ADDR), sizeof (CORE_ADDR),
	599	xmalloc, free);
a8a69e63	600	}