[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"

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

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

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

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

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

/* END-FIXME */

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

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

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

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

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

void
cp_print_value_fields (type, valaddr, stream, format, recurse, pretty,
		       dont_print_vb, dont_print_statmem)
     struct type *type;
     char *valaddr;
     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_stub_type (type);

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

  /* Print out baseclasses such that we don't print
     duplicates of virtual baseclasses.  */
  if (n_baseclasses > 0)
    cplus_print_value (type, valaddr, stream, format, recurse+1, pretty,
		       dont_print_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
cplus_print_value (type, valaddr, stream, format, recurse, pretty,
		   dont_print_vb)
     struct type *type;
     char *valaddr;
     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++)
    {
      /* FIXME-32x64--assumes that a target pointer can fit in a char *.
	 Fix it by nuking baseclass_addr.  */
      char *baddr;
      int err;
      char *basename;

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

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

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

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

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

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

      if (pretty)
	{
	  fprintf_filtered (stream, "\n");
	  print_spaces_filtered (2 * recurse, stream);
	}
      fputs_filtered ("<", stream);
      /* Not sure what the best notation is in the case where there is no
	 baseclass name.  */
      fputs_filtered (basename ? basename : "", stream);
      fputs_filtered ("> = ", stream);
      if (err != 0)
	{
	  fprintf_filtered (stream, "<invalid address ");
	  print_address_numeric ((CORE_ADDR) baddr, 1, stream);
	  fprintf_filtered (stream, ">");
	}
      else
	cp_print_value_fields (TYPE_BASECLASS (type, i), baddr, 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_stub_type (type);
      cp_print_value_fields (type, VALUE_CONTENTS (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"
a8a69e63 FF	32
	33	int vtblprint; /* Controls printing of vtbl's */
	34	int objectprint; /* Controls looking up an object's derived type
	35	using what we find in its vtables. */
4c664b8d	36	static int static_field_print; /* Controls printing of static fields. */
a1a0d974 PS	37
	38	static struct obstack dont_print_vb_obstack;
	39	static struct obstack dont_print_statmem_obstack;
	40
	41	static void
	42	cp_print_static_field PARAMS ((struct type , value_ptr, GDB_FILE , int, int,
	43	enum val_prettyprint));
a8a69e63 FF	44
a8a69e63 FF	45	static void
199b2450	46	cplus_print_value PARAMS ((struct type , char , GDB_FILE *, int, int,
a8a69e63 FF	47	enum val_prettyprint, struct type **));
	48
	49	/* BEGIN-FIXME: Hooks into typeprint.c, find a better home for prototypes. */
	50
	51	extern void
199b2450	52	c_type_print_base PARAMS ((struct type , GDB_FILE , int, int));
a8a69e63 FF	53
a8a69e63 FF	54	extern void
199b2450	55	c_type_print_varspec_prefix PARAMS ((struct type , GDB_FILE , int, int));
a8a69e63 FF	56
	57	extern void
	58	cp_type_print_method_args PARAMS ((struct type *, char , char *, int,
199b2450	59	GDB_FILE *));
a8a69e63	60
a8a69e63 FF	61	/* END-FIXME */
a8a69e63 FF	62
c7da3ed3 FF	63	void
	64	cp_print_class_method (valaddr, type, stream)
	65	char *valaddr;
	66	struct type *type;
199b2450	67	GDB_FILE *stream;
c7da3ed3 FF	68	{
c7da3ed3 FF	69	struct type *domain;
72cd0384 RP	70	struct fn_field *f = NULL;
72cd0384 RP	71	int j = 0;
c7da3ed3 FF	72	int len2;
	73	int offset;
	74	char *kind = "";
	75	CORE_ADDR addr;
	76	struct symbol *sym;
	77	unsigned len;
	78	unsigned int i;
	79
30d20d15	80	check_stub_type (TYPE_TARGET_TYPE (type));
c7da3ed3	81	domain = TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type));
30d20d15 PS	82	if (domain == (struct type *)NULL)
	83	{
	84	fprintf_filtered (stream, "<unknown>");
	85	return;
	86	}
c7da3ed3 FF	87	addr = unpack_pointer (lookup_pointer_type (builtin_type_void), valaddr);
	88	if (METHOD_PTR_IS_VIRTUAL (addr))
	89	{
	90	offset = METHOD_PTR_TO_VOFFSET (addr);
	91	len = TYPE_NFN_FIELDS (domain);
	92	for (i = 0; i < len; i++)
	93	{
	94	f = TYPE_FN_FIELDLIST1 (domain, i);
	95	len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	96
	97	for (j = 0; j < len2; j++)
	98	{
	99	QUIT;
	100	if (TYPE_FN_FIELD_VOFFSET (f, j) == offset)
	101	{
	102	kind = "virtual ";
	103	goto common;
	104	}
	105	}
	106	}
	107	}
	108	else
	109	{
	110	sym = find_pc_function (addr);
	111	if (sym == 0)
	112	{
	113	error ("invalid pointer to member function");
	114	}
	115	len = TYPE_NFN_FIELDS (domain);
	116	for (i = 0; i < len; i++)
	117	{
	118	f = TYPE_FN_FIELDLIST1 (domain, i);
	119	len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	120
	121	for (j = 0; j < len2; j++)
	122	{
	123	QUIT;
39cb3d04 PS	124	if (TYPE_FN_FIELD_STUB (f, j))
39cb3d04 PS	125	check_stub_method (domain, i, j);
c7da3ed3 FF	126	if (STREQ (SYMBOL_NAME (sym), TYPE_FN_FIELD_PHYSNAME (f, j)))
	127	{
	128	goto common;
	129	}
	130	}
	131	}
	132	}
	133	common:
	134	if (i < len)
	135	{
	136	fprintf_filtered (stream, "&");
	137	c_type_print_varspec_prefix (TYPE_FN_FIELD_TYPE (f, j), stream, 0, 0);
199b2450	138	fprintf_unfiltered (stream, kind);
c7da3ed3 FF	139	if (TYPE_FN_FIELD_PHYSNAME (f, j)[0] == '_'
	140	&& TYPE_FN_FIELD_PHYSNAME (f, j)[1] == CPLUS_MARKER)
	141	{
	142	cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j) + 1, "~",
	143	TYPE_FN_FIELDLIST_NAME (domain, i),
	144	0, stream);
	145	}
	146	else
	147	{
	148	cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j), "",
	149	TYPE_FN_FIELDLIST_NAME (domain, i),
	150	0, stream);
	151	}
	152	}
	153	else
	154	{
	155	fprintf_filtered (stream, "(");
	156	type_print (type, "", stream, -1);
	157	fprintf_filtered (stream, ") %d", (int) addr >> 3);
	158	}
	159	}
	160
36a2283d PB	161	/* This was what it was for gcc 2.4.5 and earlier. */
	162	static const char vtbl_ptr_name_old[] =
	163	{ CPLUS_MARKER,'v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };
	164	/* It was changed to this after 2.4.5. */
	165	const char vtbl_ptr_name[] =
	166	{ '_','_','v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };
	167
a8a69e63 FF	168	/* Return truth value for assertion that TYPE is of the type
	169	"pointer to virtual function". */
	170
	171	int
	172	cp_is_vtbl_ptr_type(type)
	173	struct type *type;
	174	{
	175	char *typename = type_name_no_tag (type);
a8a69e63	176
8f341c15 JK	177	return (typename != NULL
	178	&& (STREQ (typename, vtbl_ptr_name)
	179	\|\| STREQ (typename, vtbl_ptr_name_old)));
a8a69e63 FF	180	}
	181
	182	/* Return truth value for the assertion that TYPE is of the type
	183	"pointer to virtual function table". */
	184
	185	int
	186	cp_is_vtbl_member(type)
	187	struct type *type;
	188	{
	189	if (TYPE_CODE (type) == TYPE_CODE_PTR)
36a2283d PB	190	{
	191	type = TYPE_TARGET_TYPE (type);
	192	if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
	193	{
	194	type = TYPE_TARGET_TYPE (type);
	195	if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */
	196	\|\| TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */
	197	{
	198	/* Virtual functions tables are full of pointers
	199	to virtual functions. */
	200	return cp_is_vtbl_ptr_type (type);
	201	}
	202	}
	203	}
a8a69e63 FF	204	return 0;
	205	}
	206
	207	/* Mutually recursive subroutines of cplus_print_value and c_val_print to
	208	print out a structure's fields: cp_print_value_fields and cplus_print_value.
	209
	210	TYPE, VALADDR, STREAM, RECURSE, and PRETTY have the
	211	same meanings as in cplus_print_value and c_val_print.
	212
	213	DONT_PRINT is an array of baseclass types that we
	214	should not print, or zero if called from top level. */
	215
	216	void
	217	cp_print_value_fields (type, valaddr, stream, format, recurse, pretty,
a1a0d974	218	dont_print_vb, dont_print_statmem)
a8a69e63 FF	219	struct type *type;
a8a69e63 FF	220	char *valaddr;
199b2450	221	GDB_FILE *stream;
a8a69e63 FF	222	int format;
	223	int recurse;
	224	enum val_prettyprint pretty;
a1a0d974 PS	225	struct type **dont_print_vb;
a1a0d974 PS	226	int dont_print_statmem;
a8a69e63 FF	227	{
a8a69e63 FF	228	int i, len, n_baseclasses;
a1a0d974 PS	229	struct obstack tmp_obstack;
a1a0d974 PS	230	char *last_dont_print = obstack_next_free (&dont_print_statmem_obstack);
a8a69e63 FF	231
	232	check_stub_type (type);
	233
	234	fprintf_filtered (stream, "{");
	235	len = TYPE_NFIELDS (type);
	236	n_baseclasses = TYPE_N_BASECLASSES (type);
	237
	238	/* Print out baseclasses such that we don't print
	239	duplicates of virtual baseclasses. */
	240	if (n_baseclasses > 0)
	241	cplus_print_value (type, valaddr, stream, format, recurse+1, pretty,
a1a0d974	242	dont_print_vb);
a8a69e63 FF	243
	244	if (!len && n_baseclasses == 1)
	245	fprintf_filtered (stream, "<No data fields>");
	246	else
	247	{
	248	extern int inspect_it;
	249	int fields_seen = 0;
	250
a1a0d974 PS	251	if (dont_print_statmem == 0)
	252	{
	253	/* If we're at top level, carve out a completely fresh
	254	chunk of the obstack and use that until this particular
	255	invocation returns. */
	256	tmp_obstack = dont_print_statmem_obstack;
	257	obstack_finish (&dont_print_statmem_obstack);
	258	}
	259
a8a69e63 FF	260	for (i = n_baseclasses; i < len; i++)
a8a69e63 FF	261	{
4c664b8d PS	262	/* If requested, skip printing of static fields. */
4c664b8d PS	263	if (!static_field_print && TYPE_FIELD_STATIC (type, i))
a8a69e63 FF	264	continue;
	265	if (fields_seen)
	266	fprintf_filtered (stream, ", ");
	267	else if (n_baseclasses > 0)
	268	{
	269	if (pretty)
	270	{
	271	fprintf_filtered (stream, "\n");
	272	print_spaces_filtered (2 + 2 * recurse, stream);
	273	fputs_filtered ("members of ", stream);
	274	fputs_filtered (type_name_no_tag (type), stream);
	275	fputs_filtered (": ", stream);
	276	}
	277	}
	278	fields_seen = 1;
	279
	280	if (pretty)
	281	{
	282	fprintf_filtered (stream, "\n");
	283	print_spaces_filtered (2 + 2 * recurse, stream);
	284	}
	285	else
	286	{
	287	wrap_here (n_spaces (2 + 2 * recurse));
	288	}
	289	if (inspect_it)
	290	{
	291	if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
	292	fputs_filtered ("\"( ptr \"", stream);
	293	else
	294	fputs_filtered ("\"( nodef \"", stream);
4c664b8d PS	295	if (TYPE_FIELD_STATIC (type, i))
4c664b8d PS	296	fputs_filtered ("static ", stream);
5e81259d FF	297	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	298	language_cplus,
	299	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63	300	fputs_filtered ("\" \"", stream);
5e81259d FF	301	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	302	language_cplus,
	303	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63 FF	304	fputs_filtered ("\") \"", stream);
	305	}
	306	else
	307	{
1c95d7ab	308	annotate_field_begin (TYPE_FIELD_TYPE (type, i));
da988c20	309
4c664b8d PS	310	if (TYPE_FIELD_STATIC (type, i))
4c664b8d PS	311	fputs_filtered ("static ", stream);
5e81259d FF	312	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	313	language_cplus,
	314	DMGL_PARAMS \| DMGL_ANSI);
1c95d7ab	315	annotate_field_name_end ();
a8a69e63	316	fputs_filtered (" = ", stream);
1c95d7ab	317	annotate_field_value ();
96f7edbd JK	318	}
96f7edbd JK	319
4c664b8d	320	if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
a8a69e63	321	{
82a2edfb	322	value_ptr v;
a8a69e63 FF	323
	324	/* Bitfields require special handling, especially due to byte
	325	order problems. */
024f65b1 KH	326	if (TYPE_FIELD_IGNORE (type, i))
024f65b1 KH	327	{
aa074e84	328	fputs_filtered ("<optimized out or zero length>", stream);
024f65b1 KH	329	}
	330	else
	331	{
	332	v = value_from_longest (TYPE_FIELD_TYPE (type, i),
a8a69e63 FF	333	unpack_field_as_long (type, valaddr, i));
a8a69e63 FF	334
dda398c3 JK	335	val_print (TYPE_FIELD_TYPE(type, i), VALUE_CONTENTS (v), 0,
dda398c3 JK	336	stream, format, 0, recurse + 1, pretty);
024f65b1	337	}
a8a69e63 FF	338	}
	339	else
	340	{
024f65b1 KH	341	if (TYPE_FIELD_IGNORE (type, i))
024f65b1 KH	342	{
aa074e84	343	fputs_filtered ("<optimized out or zero length>", stream);
024f65b1	344	}
4c664b8d PS	345	else if (TYPE_FIELD_STATIC (type, i))
	346	{
	347	value_ptr v;
	348	char *phys_name = TYPE_FIELD_STATIC_PHYSNAME (type, i);
	349	struct symbol *sym =
	350	lookup_symbol (phys_name, 0, VAR_NAMESPACE, 0, NULL);
	351	if (sym == NULL)
	352	fputs_filtered ("<optimized out>", stream);
	353	else
	354	{
	355	v = value_at (TYPE_FIELD_TYPE (type, i),
	356	(CORE_ADDR)SYMBOL_BLOCK_VALUE (sym));
a1a0d974 PS	357	cp_print_static_field (TYPE_FIELD_TYPE (type, i), v,
	358	stream, format, recurse + 1,
	359	pretty);
4c664b8d PS	360	}
4c664b8d PS	361	}
024f65b1 KH	362	else
024f65b1 KH	363	{
dda398c3 JK	364	val_print (TYPE_FIELD_TYPE (type, i),
	365	valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
	366	0, stream, format, 0, recurse + 1, pretty);
024f65b1	367	}
a8a69e63	368	}
1c95d7ab	369	annotate_field_end ();
a8a69e63	370	}
96f7edbd	371
a1a0d974 PS	372	if (dont_print_statmem == 0)
	373	{
	374	/* Free the space used to deal with the printing
	375	of the members from top level. */
	376	obstack_free (&dont_print_statmem_obstack, last_dont_print);
	377	dont_print_statmem_obstack = tmp_obstack;
	378	}
	379
a8a69e63 FF	380	if (pretty)
	381	{
	382	fprintf_filtered (stream, "\n");
	383	print_spaces_filtered (2 * recurse, stream);
	384	}
	385	}
	386	fprintf_filtered (stream, "}");
	387	}
	388
	389	/* Special val_print routine to avoid printing multiple copies of virtual
	390	baseclasses. */
	391
	392	static void
a1a0d974 PS	393	cplus_print_value (type, valaddr, stream, format, recurse, pretty,
a1a0d974 PS	394	dont_print_vb)
a8a69e63 FF	395	struct type *type;
a8a69e63 FF	396	char *valaddr;
199b2450	397	GDB_FILE *stream;
a8a69e63 FF	398	int format;
	399	int recurse;
	400	enum val_prettyprint pretty;
a1a0d974	401	struct type **dont_print_vb;
a8a69e63 FF	402	{
	403	struct obstack tmp_obstack;
	404	struct type **last_dont_print
a1a0d974	405	= (struct type **)obstack_next_free (&dont_print_vb_obstack);
a8a69e63 FF	406	int i, n_baseclasses = TYPE_N_BASECLASSES (type);
a8a69e63 FF	407
a1a0d974	408	if (dont_print_vb == 0)
a8a69e63 FF	409	{
	410	/* If we're at top level, carve out a completely fresh
	411	chunk of the obstack and use that until this particular
	412	invocation returns. */
a1a0d974	413	tmp_obstack = dont_print_vb_obstack;
a8a69e63	414	/* Bump up the high-water mark. Now alpha is omega. */
a1a0d974	415	obstack_finish (&dont_print_vb_obstack);
a8a69e63 FF	416	}
	417
	418	for (i = 0; i < n_baseclasses; i++)
	419	{
5e678752 JK	420	/* FIXME-32x64--assumes that a target pointer can fit in a char *.
5e678752 JK	421	Fix it by nuking baseclass_addr. */
a8a69e63 FF	422	char *baddr;
a8a69e63 FF	423	int err;
2d2fc7e4 JK	424	char *basename;
	425
	426	check_stub_type (TYPE_BASECLASS (type, i));
	427	basename = TYPE_NAME (TYPE_BASECLASS (type, i));
a8a69e63 FF	428
	429	if (BASETYPE_VIA_VIRTUAL (type, i))
	430	{
	431	struct type **first_dont_print
a1a0d974	432	= (struct type **)obstack_base (&dont_print_vb_obstack);
a8a69e63	433
a1a0d974	434	int j = (struct type **)obstack_next_free (&dont_print_vb_obstack)
a8a69e63 FF	435	- first_dont_print;
	436
	437	while (--j >= 0)
	438	if (TYPE_BASECLASS (type, i) == first_dont_print[j])
	439	goto flush_it;
	440
a1a0d974	441	obstack_ptr_grow (&dont_print_vb_obstack, TYPE_BASECLASS (type, i));
a8a69e63 FF	442	}
	443
	444	/* Fix to use baseclass_offset instead. FIXME */
	445	baddr = baseclass_addr (type, i, valaddr, 0, &err);
	446	if (err == 0 && baddr == 0)
1410f5f1 JK	447	error ("could not find virtual baseclass %s\n",
1410f5f1 JK	448	basename ? basename : "");
a8a69e63 FF	449
	450	if (pretty)
	451	{
	452	fprintf_filtered (stream, "\n");
	453	print_spaces_filtered (2 * recurse, stream);
	454	}
	455	fputs_filtered ("<", stream);
1410f5f1 JK	456	/* Not sure what the best notation is in the case where there is no
	457	baseclass name. */
	458	fputs_filtered (basename ? basename : "", stream);
a8a69e63 FF	459	fputs_filtered ("> = ", stream);
a8a69e63 FF	460	if (err != 0)
833e0d94 JK	461	{
833e0d94 JK	462	fprintf_filtered (stream, "<invalid address ");
d24c0599	463	print_address_numeric ((CORE_ADDR) baddr, 1, stream);
833e0d94 JK	464	fprintf_filtered (stream, ">");
833e0d94 JK	465	}
a8a69e63 FF	466	else
	467	cp_print_value_fields (TYPE_BASECLASS (type, i), baddr, stream, format,
	468	recurse, pretty,
a1a0d974 PS	469	(struct type **) obstack_base (&dont_print_vb_obstack),
a1a0d974 PS	470	0);
a8a69e63 FF	471	fputs_filtered (", ", stream);
	472
	473	flush_it:
	474	;
	475	}
	476
a1a0d974	477	if (dont_print_vb == 0)
a8a69e63 FF	478	{
	479	/* Free the space used to deal with the printing
	480	of this type from top level. */
a1a0d974	481	obstack_free (&dont_print_vb_obstack, last_dont_print);
a8a69e63 FF	482	/* Reset watermark so that we can continue protecting
a8a69e63 FF	483	ourselves from whatever we were protecting ourselves. */
a1a0d974 PS	484	dont_print_vb_obstack = tmp_obstack;
	485	}
	486	}
	487
	488	/* Print value of a static member.
	489	To avoid infinite recursion when printing a class that contains
	490	a static instance of the class, we keep the addresses of all printed
	491	static member classes in an obstack and refuse to print them more
	492	than once.
	493
	494	VAL contains the value to print, TYPE, STREAM, RECURSE, and PRETTY
	495	have the same meanings as in c_val_print. */
	496
	497	static void
	498	cp_print_static_field (type, val, stream, format, recurse, pretty)
	499	struct type *type;
	500	value_ptr val;
	501	GDB_FILE *stream;
	502	int format;
	503	int recurse;
	504	enum val_prettyprint pretty;
	505	{
	506	if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
	507	{
	508	CORE_ADDR *first_dont_print;
	509	int i;
	510
	511	first_dont_print
	512	= (CORE_ADDR *)obstack_base (&dont_print_statmem_obstack);
	513	i = (CORE_ADDR *)obstack_next_free (&dont_print_statmem_obstack)
	514	- first_dont_print;
	515
	516	while (--i >= 0)
	517	{
	518	if (VALUE_ADDRESS (val) == first_dont_print[i])
	519	{
	520	fputs_filtered ("<same as static member of an already seen type>",
	521	stream);
	522	return;
	523	}
	524	}
	525
	526	obstack_grow (&dont_print_statmem_obstack, &VALUE_ADDRESS (val),
	527	sizeof (CORE_ADDR));
	528
	529	check_stub_type (type);
	530	cp_print_value_fields (type, VALUE_CONTENTS (val),
	531	stream, format, recurse, pretty,
	532	NULL, 1);
	533	return;
a8a69e63	534	}
a1a0d974 PS	535	val_print (type, VALUE_CONTENTS (val), VALUE_ADDRESS (val),
a1a0d974 PS	536	stream, format, 0, recurse, pretty);
a8a69e63 FF	537	}
	538
	539	void
	540	cp_print_class_member (valaddr, domain, stream, prefix)
	541	char *valaddr;
	542	struct type *domain;
199b2450	543	GDB_FILE *stream;
a8a69e63 FF	544	char *prefix;
	545	{
	546
	547	/* VAL is a byte offset into the structure type DOMAIN.
	548	Find the name of the field for that offset and
	549	print it. */
	550	int extra = 0;
	551	int bits = 0;
	552	register unsigned int i;
	553	unsigned len = TYPE_NFIELDS (domain);
	554	/* @@ Make VAL into bit offset */
	555	LONGEST val = unpack_long (builtin_type_int, valaddr) << 3;
	556	for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
	557	{
	558	int bitpos = TYPE_FIELD_BITPOS (domain, i);
	559	QUIT;
	560	if (val == bitpos)
	561	break;
	562	if (val < bitpos && i != 0)
	563	{
	564	/* Somehow pointing into a field. */
	565	i -= 1;
	566	extra = (val - TYPE_FIELD_BITPOS (domain, i));
	567	if (extra & 0x7)
	568	bits = 1;
	569	else
	570	extra >>= 3;
	571	break;
	572	}
	573	}
	574	if (i < len)
	575	{
	576	char *name;
	577	fprintf_filtered (stream, prefix);
	578	name = type_name_no_tag (domain);
	579	if (name)
	580	fputs_filtered (name, stream);
	581	else
	582	c_type_print_base (domain, stream, 0, 0);
	583	fprintf_filtered (stream, "::");
	584	fputs_filtered (TYPE_FIELD_NAME (domain, i), stream);
	585	if (extra)
	586	fprintf_filtered (stream, " + %d bytes", extra);
	587	if (bits)
	588	fprintf_filtered (stream, " (offset in bits)");
	589	}
	590	else
	591	fprintf_filtered (stream, "%d", val >> 3);
	592	}
	593
	594	void
	595	_initialize_cp_valprint ()
	596	{
4c664b8d PS	597	add_show_from_set
	598	(add_set_cmd ("static-members", class_support, var_boolean,
	599	(char *)&static_field_print,
	600	"Set printing of C++ static members.",
	601	&setprintlist),
	602	&showprintlist);
	603	/* Turn on printing of static fields. */
	604	static_field_print = 1;
	605
a8a69e63 FF	606	add_show_from_set
	607	(add_set_cmd ("vtbl", class_support, var_boolean, (char *)&vtblprint,
	608	"Set printing of C++ virtual function tables.",
	609	&setprintlist),
	610	&showprintlist);
	611
	612	add_show_from_set
	613	(add_set_cmd ("object", class_support, var_boolean, (char *)&objectprint,
	614	"Set printing of object's derived type based on vtable info.",
	615	&setprintlist),
	616	&showprintlist);
	617
	618	/* Give people the defaults which they are used to. */
	619	objectprint = 0;
	620	vtblprint = 0;
a1a0d974 PS	621	obstack_begin (&dont_print_vb_obstack, 32 * sizeof (struct type *));
	622	obstack_specify_allocation (&dont_print_statmem_obstack,
	623	32 * sizeof (CORE_ADDR), sizeof (CORE_ADDR),
	624	xmalloc, free);
a8a69e63	625	}