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[/] [or1k/] [tags/] [VER_5_3/] [gdb-5.3/] [gdb/] [hpacc-abi.c] - Diff between revs 1182 and 1765

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/* Abstraction of HP aCC ABI.
/* Abstraction of HP aCC ABI.
   Contributed by Daniel Berlin <dberlin@redhat.com>
   Contributed by Daniel Berlin <dberlin@redhat.com>
   Most of the real code is from HP, i've just fiddled it to fit in
   Most of the real code is from HP, i've just fiddled it to fit in
   the C++ ABI abstraction framework.
   the C++ ABI abstraction framework.
 
 
   Copyright 2001 Free Software Foundation, Inc.
   Copyright 2001 Free Software Foundation, Inc.
 
 
   This file is part of GDB.
   This file is part of GDB.
 
 
   This program is free software; you can redistribute it and/or
   This program is free software; you can redistribute it and/or
   modify
   modify
   it under the terms of the GNU General Public License as published
   it under the terms of the GNU General Public License as published
   by
   by
   the Free Software Foundation; either version 2 of the License, or
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   (at your option) any later version.
 
 
   This program is distributed in the hope that it will be useful,
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   GNU General Public License for more details.
 
 
   You should have received a copy of the GNU General Public License
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */
   Boston, MA 02111-1307, USA.  */
 
 
#include "defs.h"
#include "defs.h"
#include "value.h"
#include "value.h"
#include "gdb_regex.h"
#include "gdb_regex.h"
#include "gdb_string.h"
#include "gdb_string.h"
#include "gdbtypes.h"
#include "gdbtypes.h"
#include "gdbcore.h"
#include "gdbcore.h"
#include "cp-abi.h"
#include "cp-abi.h"
 
 
struct cp_abi_ops hpacc_abi_ops;
struct cp_abi_ops hpacc_abi_ops;
 
 
/* It appears the is_*_name stuff is never used when we try the hpACC
/* It appears the is_*_name stuff is never used when we try the hpACC
 * ABI. As such, I have no clue what the real answers are. Shouldn't
 * ABI. As such, I have no clue what the real answers are. Shouldn't
 * have any more effect than it does now.  */
 * have any more effect than it does now.  */
static regex_t constructor_pattern;
static regex_t constructor_pattern;
static regex_t destructor_pattern;
static regex_t destructor_pattern;
static regex_t operator_pattern;
static regex_t operator_pattern;
 
 
static enum dtor_kinds
static enum dtor_kinds
hpacc_is_destructor_name (const char *name)
hpacc_is_destructor_name (const char *name)
{
{
  if (regexec (&destructor_pattern, name, 0, 0, 0) == 0)
  if (regexec (&destructor_pattern, name, 0, 0, 0) == 0)
    return complete_object_dtor;
    return complete_object_dtor;
  else
  else
    return 0;
    return 0;
}
}
 
 
static enum ctor_kinds
static enum ctor_kinds
hpacc_is_constructor_name (const char *name)
hpacc_is_constructor_name (const char *name)
{
{
  if (regexec (&constructor_pattern, name, 0, 0, 0) == 0)
  if (regexec (&constructor_pattern, name, 0, 0, 0) == 0)
    return complete_object_ctor;
    return complete_object_ctor;
  else
  else
    return 0;
    return 0;
}
}
 
 
static int
static int
hpacc_is_operator_name (const char *name)
hpacc_is_operator_name (const char *name)
{
{
  return regexec (&operator_pattern, name, 0, 0, 0) == 0;
  return regexec (&operator_pattern, name, 0, 0, 0) == 0;
}
}
 
 
static int
static int
hpacc_is_vtable_name (const char *name)
hpacc_is_vtable_name (const char *name)
{
{
  return strcmp (name,
  return strcmp (name,
                 "This will never match anything, please fill it in") == 0;
                 "This will never match anything, please fill it in") == 0;
}
}
 
 
/* Return a virtual function as a value.
/* Return a virtual function as a value.
   ARG1 is the object which provides the virtual function
   ARG1 is the object which provides the virtual function
   table pointer.  *ARG1P is side-effected in calling this function.
   table pointer.  *ARG1P is side-effected in calling this function.
   F is the list of member functions which contains the desired virtual
   F is the list of member functions which contains the desired virtual
   function.
   function.
   J is an index into F which provides the desired virtual function.
   J is an index into F which provides the desired virtual function.
 
 
   TYPE is the type in which F is located.  */
   TYPE is the type in which F is located.  */
static struct value *
static struct value *
hpacc_virtual_fn_field (struct value **arg1p, struct fn_field * f, int j,
hpacc_virtual_fn_field (struct value **arg1p, struct fn_field * f, int j,
                        struct type * type, int offset)
                        struct type * type, int offset)
{
{
  struct value *arg1 = *arg1p;
  struct value *arg1 = *arg1p;
  struct type *type1 = check_typedef (VALUE_TYPE (arg1));
  struct type *type1 = check_typedef (VALUE_TYPE (arg1));
 
 
  /* Deal with HP/Taligent runtime model for virtual functions */
  /* Deal with HP/Taligent runtime model for virtual functions */
  struct value *vp;
  struct value *vp;
  struct value *argp;           /* arg1 cast to base */
  struct value *argp;           /* arg1 cast to base */
  CORE_ADDR coreptr;            /* pointer to target address */
  CORE_ADDR coreptr;            /* pointer to target address */
  int class_index;              /* which class segment pointer to use */
  int class_index;              /* which class segment pointer to use */
  struct type *ftype = TYPE_FN_FIELD_TYPE (f, j);       /* method type */
  struct type *ftype = TYPE_FN_FIELD_TYPE (f, j);       /* method type */
 
 
  argp = value_cast (type, *arg1p);
  argp = value_cast (type, *arg1p);
 
 
  if (VALUE_ADDRESS (argp) == 0)
  if (VALUE_ADDRESS (argp) == 0)
    error ("Address of object is null; object may not have been created.");
    error ("Address of object is null; object may not have been created.");
 
 
  /* pai: FIXME -- 32x64 possible problem? */
  /* pai: FIXME -- 32x64 possible problem? */
  /* First word (4 bytes) in object layout is the vtable pointer */
  /* First word (4 bytes) in object layout is the vtable pointer */
  coreptr = *(CORE_ADDR *) (VALUE_CONTENTS (argp));     /* pai: (temp)  */
  coreptr = *(CORE_ADDR *) (VALUE_CONTENTS (argp));     /* pai: (temp)  */
  /* + offset + VALUE_EMBEDDED_OFFSET (argp)); */
  /* + offset + VALUE_EMBEDDED_OFFSET (argp)); */
 
 
  if (!coreptr)
  if (!coreptr)
    error
    error
      ("Virtual table pointer is null for object; object may not have been created.");
      ("Virtual table pointer is null for object; object may not have been created.");
 
 
  /* pai/1997-05-09
  /* pai/1997-05-09
   * FIXME: The code here currently handles only
   * FIXME: The code here currently handles only
   * the non-RRBC case of the Taligent/HP runtime spec; when RRBC
   * the non-RRBC case of the Taligent/HP runtime spec; when RRBC
   * is introduced, the condition for the "if" below will have to
   * is introduced, the condition for the "if" below will have to
   * be changed to be a test for the RRBC case.  */
   * be changed to be a test for the RRBC case.  */
 
 
  if (1)
  if (1)
    {
    {
      /* Non-RRBC case; the virtual function pointers are stored at fixed
      /* Non-RRBC case; the virtual function pointers are stored at fixed
       * offsets in the virtual table. */
       * offsets in the virtual table. */
 
 
      /* Retrieve the offset in the virtual table from the debug
      /* Retrieve the offset in the virtual table from the debug
       * info.  The offset of the vfunc's entry is in words from
       * info.  The offset of the vfunc's entry is in words from
       * the beginning of the vtable; but first we have to adjust
       * the beginning of the vtable; but first we have to adjust
       * by HP_ACC_VFUNC_START to account for other entries */
       * by HP_ACC_VFUNC_START to account for other entries */
 
 
      /* pai: FIXME: 32x64 problem here, a word may be 8 bytes in
      /* pai: FIXME: 32x64 problem here, a word may be 8 bytes in
       * which case the multiplier should be 8 and values should be long */
       * which case the multiplier should be 8 and values should be long */
      vp = value_at (builtin_type_int,
      vp = value_at (builtin_type_int,
                     coreptr + 4 * (TYPE_FN_FIELD_VOFFSET (f, j) +
                     coreptr + 4 * (TYPE_FN_FIELD_VOFFSET (f, j) +
                                    HP_ACC_VFUNC_START), NULL);
                                    HP_ACC_VFUNC_START), NULL);
 
 
      coreptr = *(CORE_ADDR *) (VALUE_CONTENTS (vp));
      coreptr = *(CORE_ADDR *) (VALUE_CONTENTS (vp));
      /* coreptr now contains the address of the virtual function */
      /* coreptr now contains the address of the virtual function */
      /* (Actually, it contains the pointer to the plabel for the function. */
      /* (Actually, it contains the pointer to the plabel for the function. */
    }
    }
  else
  else
    {
    {
      /* RRBC case; the virtual function pointers are found by double
      /* RRBC case; the virtual function pointers are found by double
       * indirection through the class segment tables. */
       * indirection through the class segment tables. */
 
 
      /* Choose class segment depending on type we were passed */
      /* Choose class segment depending on type we were passed */
      class_index = class_index_in_primary_list (type);
      class_index = class_index_in_primary_list (type);
 
 
      /* Find class segment pointer.  These are in the vtable slots after
      /* Find class segment pointer.  These are in the vtable slots after
       * some other entries, so adjust by HP_ACC_VFUNC_START for that. */
       * some other entries, so adjust by HP_ACC_VFUNC_START for that. */
      /* pai: FIXME 32x64 problem here, if words are 8 bytes long
      /* pai: FIXME 32x64 problem here, if words are 8 bytes long
       * the multiplier below has to be 8 and value should be long. */
       * the multiplier below has to be 8 and value should be long. */
      vp = value_at (builtin_type_int,
      vp = value_at (builtin_type_int,
                     coreptr + 4 * (HP_ACC_VFUNC_START + class_index), NULL);
                     coreptr + 4 * (HP_ACC_VFUNC_START + class_index), NULL);
      /* Indirect once more, offset by function index */
      /* Indirect once more, offset by function index */
      /* pai: FIXME 32x64 problem here, again multiplier could be 8 and value long */
      /* pai: FIXME 32x64 problem here, again multiplier could be 8 and value long */
      coreptr =
      coreptr =
        *(CORE_ADDR *) (VALUE_CONTENTS (vp) +
        *(CORE_ADDR *) (VALUE_CONTENTS (vp) +
                        4 * TYPE_FN_FIELD_VOFFSET (f, j));
                        4 * TYPE_FN_FIELD_VOFFSET (f, j));
      vp = value_at (builtin_type_int, coreptr, NULL);
      vp = value_at (builtin_type_int, coreptr, NULL);
      coreptr = *(CORE_ADDR *) (VALUE_CONTENTS (vp));
      coreptr = *(CORE_ADDR *) (VALUE_CONTENTS (vp));
 
 
      /* coreptr now contains the address of the virtual function */
      /* coreptr now contains the address of the virtual function */
      /* (Actually, it contains the pointer to the plabel for the function.) */
      /* (Actually, it contains the pointer to the plabel for the function.) */
 
 
    }
    }
 
 
  if (!coreptr)
  if (!coreptr)
    error ("Address of virtual function is null; error in virtual table?");
    error ("Address of virtual function is null; error in virtual table?");
 
 
  /* Wrap this addr in a value and return pointer */
  /* Wrap this addr in a value and return pointer */
  vp = allocate_value (ftype);
  vp = allocate_value (ftype);
  VALUE_TYPE (vp) = ftype;
  VALUE_TYPE (vp) = ftype;
  VALUE_ADDRESS (vp) = coreptr;
  VALUE_ADDRESS (vp) = coreptr;
 
 
  /* pai: (temp) do we need the value_ind stuff in value_fn_field? */
  /* pai: (temp) do we need the value_ind stuff in value_fn_field? */
  return vp;
  return vp;
}
}
 
 
 
 
static struct type *
static struct type *
hpacc_value_rtti_type (struct value *v, int *full, int *top, int *using_enc)
hpacc_value_rtti_type (struct value *v, int *full, int *top, int *using_enc)
{
{
  struct type *known_type;
  struct type *known_type;
  struct type *rtti_type;
  struct type *rtti_type;
  CORE_ADDR coreptr;
  CORE_ADDR coreptr;
  struct value *vp;
  struct value *vp;
  int using_enclosing = 0;
  int using_enclosing = 0;
  long top_offset = 0;
  long top_offset = 0;
  char rtti_type_name[256];
  char rtti_type_name[256];
 
 
  if (full)
  if (full)
    *full = 0;
    *full = 0;
  if (top)
  if (top)
    *top = -1;
    *top = -1;
  if (using_enc)
  if (using_enc)
    *using_enc = 0;
    *using_enc = 0;
 
 
  /* Get declared type */
  /* Get declared type */
  known_type = VALUE_TYPE (v);
  known_type = VALUE_TYPE (v);
  CHECK_TYPEDEF (known_type);
  CHECK_TYPEDEF (known_type);
  /* RTTI works only or class objects */
  /* RTTI works only or class objects */
  if (TYPE_CODE (known_type) != TYPE_CODE_CLASS)
  if (TYPE_CODE (known_type) != TYPE_CODE_CLASS)
    return NULL;
    return NULL;
 
 
  /* If neither the declared type nor the enclosing type of the
  /* If neither the declared type nor the enclosing type of the
   * value structure has a HP ANSI C++ style virtual table,
   * value structure has a HP ANSI C++ style virtual table,
   * we can't do anything. */
   * we can't do anything. */
  if (!TYPE_HAS_VTABLE (known_type))
  if (!TYPE_HAS_VTABLE (known_type))
    {
    {
      known_type = VALUE_ENCLOSING_TYPE (v);
      known_type = VALUE_ENCLOSING_TYPE (v);
      CHECK_TYPEDEF (known_type);
      CHECK_TYPEDEF (known_type);
      if ((TYPE_CODE (known_type) != TYPE_CODE_CLASS) ||
      if ((TYPE_CODE (known_type) != TYPE_CODE_CLASS) ||
          !TYPE_HAS_VTABLE (known_type))
          !TYPE_HAS_VTABLE (known_type))
        return NULL;            /* No RTTI, or not HP-compiled types */
        return NULL;            /* No RTTI, or not HP-compiled types */
      CHECK_TYPEDEF (known_type);
      CHECK_TYPEDEF (known_type);
      using_enclosing = 1;
      using_enclosing = 1;
    }
    }
 
 
  if (using_enclosing && using_enc)
  if (using_enclosing && using_enc)
    *using_enc = 1;
    *using_enc = 1;
 
 
  /* First get the virtual table address */
  /* First get the virtual table address */
  coreptr = *(CORE_ADDR *) ((VALUE_CONTENTS_ALL (v))
  coreptr = *(CORE_ADDR *) ((VALUE_CONTENTS_ALL (v))
                            + VALUE_OFFSET (v)
                            + VALUE_OFFSET (v)
                            + (using_enclosing
                            + (using_enclosing
                               ? 0
                               ? 0
                               : VALUE_EMBEDDED_OFFSET (v)));
                               : VALUE_EMBEDDED_OFFSET (v)));
  if (coreptr == 0)
  if (coreptr == 0)
    /* return silently -- maybe called on gdb-generated value */
    /* return silently -- maybe called on gdb-generated value */
    return NULL;
    return NULL;
 
 
  /* Fetch the top offset of the object */
  /* Fetch the top offset of the object */
  /* FIXME possible 32x64 problem with pointer size & arithmetic */
  /* FIXME possible 32x64 problem with pointer size & arithmetic */
  vp = value_at (builtin_type_int,
  vp = value_at (builtin_type_int,
                 coreptr + 4 * HP_ACC_TOP_OFFSET_OFFSET,
                 coreptr + 4 * HP_ACC_TOP_OFFSET_OFFSET,
                 VALUE_BFD_SECTION (v));
                 VALUE_BFD_SECTION (v));
  top_offset = value_as_long (vp);
  top_offset = value_as_long (vp);
  if (top)
  if (top)
    *top = top_offset;
    *top = top_offset;
 
 
  /* Fetch the typeinfo pointer */
  /* Fetch the typeinfo pointer */
  /* FIXME possible 32x64 problem with pointer size & arithmetic */
  /* FIXME possible 32x64 problem with pointer size & arithmetic */
  vp = value_at (builtin_type_int, coreptr + 4 * HP_ACC_TYPEINFO_OFFSET,
  vp = value_at (builtin_type_int, coreptr + 4 * HP_ACC_TYPEINFO_OFFSET,
                 VALUE_BFD_SECTION (v));
                 VALUE_BFD_SECTION (v));
  /* Indirect through the typeinfo pointer and retrieve the pointer
  /* Indirect through the typeinfo pointer and retrieve the pointer
   * to the string name */
   * to the string name */
  coreptr = *(CORE_ADDR *) (VALUE_CONTENTS (vp));
  coreptr = *(CORE_ADDR *) (VALUE_CONTENTS (vp));
  if (!coreptr)
  if (!coreptr)
    error ("Retrieved null typeinfo pointer in trying to determine "
    error ("Retrieved null typeinfo pointer in trying to determine "
           "run-time type");
           "run-time type");
  /* 4 -> offset of name field */
  /* 4 -> offset of name field */
  vp = value_at (builtin_type_int, coreptr + 4, VALUE_BFD_SECTION (v));
  vp = value_at (builtin_type_int, coreptr + 4, VALUE_BFD_SECTION (v));
  /* FIXME possible 32x64 problem */
  /* FIXME possible 32x64 problem */
 
 
  coreptr = *(CORE_ADDR *) (VALUE_CONTENTS (vp));
  coreptr = *(CORE_ADDR *) (VALUE_CONTENTS (vp));
 
 
  read_memory_string (coreptr, rtti_type_name, 256);
  read_memory_string (coreptr, rtti_type_name, 256);
 
 
  if (strlen (rtti_type_name) == 0)
  if (strlen (rtti_type_name) == 0)
    error ("Retrieved null type name from typeinfo");
    error ("Retrieved null type name from typeinfo");
 
 
  /* search for type */
  /* search for type */
  rtti_type = lookup_typename (rtti_type_name, (struct block *) 0, 1);
  rtti_type = lookup_typename (rtti_type_name, (struct block *) 0, 1);
 
 
  if (!rtti_type)
  if (!rtti_type)
    error ("Could not find run-time type: invalid type name %s in typeinfo??",
    error ("Could not find run-time type: invalid type name %s in typeinfo??",
           rtti_type_name);
           rtti_type_name);
  CHECK_TYPEDEF (rtti_type);
  CHECK_TYPEDEF (rtti_type);
#if 0
#if 0
  printf ("RTTI type name %s, tag %s, full? %d\n", TYPE_NAME (rtti_type),
  printf ("RTTI type name %s, tag %s, full? %d\n", TYPE_NAME (rtti_type),
          TYPE_TAG_NAME (rtti_type), full ? *full : -1);
          TYPE_TAG_NAME (rtti_type), full ? *full : -1);
#endif
#endif
  /* Check whether we have the entire object */
  /* Check whether we have the entire object */
  if (full                      /* Non-null pointer passed */
  if (full                      /* Non-null pointer passed */
      &&
      &&
      /* Either we checked on the whole object in hand and found the
      /* Either we checked on the whole object in hand and found the
         top offset to be zero */
         top offset to be zero */
      (((top_offset == 0) &&
      (((top_offset == 0) &&
        using_enclosing &&
        using_enclosing &&
        TYPE_LENGTH (known_type) == TYPE_LENGTH (rtti_type))
        TYPE_LENGTH (known_type) == TYPE_LENGTH (rtti_type))
       ||
       ||
       /* Or we checked on the embedded object and top offset was the
       /* Or we checked on the embedded object and top offset was the
          same as the embedded offset */
          same as the embedded offset */
       ((top_offset == VALUE_EMBEDDED_OFFSET (v)) &&
       ((top_offset == VALUE_EMBEDDED_OFFSET (v)) &&
        !using_enclosing &&
        !using_enclosing &&
        TYPE_LENGTH (VALUE_ENCLOSING_TYPE (v)) == TYPE_LENGTH (rtti_type))))
        TYPE_LENGTH (VALUE_ENCLOSING_TYPE (v)) == TYPE_LENGTH (rtti_type))))
 
 
    *full = 1;
    *full = 1;
 
 
  return rtti_type;
  return rtti_type;
}
}
 
 
extern int gnuv2_baseclass_offset (struct type *type, int index,
extern int gnuv2_baseclass_offset (struct type *type, int index,
                                   char *valaddr, CORE_ADDR address);
                                   char *valaddr, CORE_ADDR address);
 
 
static void
static void
init_hpacc_ops (void)
init_hpacc_ops (void)
{
{
  hpacc_abi_ops.shortname = "hpaCC";
  hpacc_abi_ops.shortname = "hpaCC";
  hpacc_abi_ops.longname = "HP aCC ABI";
  hpacc_abi_ops.longname = "HP aCC ABI";
  hpacc_abi_ops.doc = "HP aCC ABI";
  hpacc_abi_ops.doc = "HP aCC ABI";
  hpacc_abi_ops.is_destructor_name = hpacc_is_destructor_name;
  hpacc_abi_ops.is_destructor_name = hpacc_is_destructor_name;
  hpacc_abi_ops.is_constructor_name = hpacc_is_constructor_name;
  hpacc_abi_ops.is_constructor_name = hpacc_is_constructor_name;
  hpacc_abi_ops.is_vtable_name = hpacc_is_vtable_name;
  hpacc_abi_ops.is_vtable_name = hpacc_is_vtable_name;
  hpacc_abi_ops.is_operator_name = hpacc_is_operator_name;
  hpacc_abi_ops.is_operator_name = hpacc_is_operator_name;
  hpacc_abi_ops.virtual_fn_field = hpacc_virtual_fn_field;
  hpacc_abi_ops.virtual_fn_field = hpacc_virtual_fn_field;
  hpacc_abi_ops.rtti_type = hpacc_value_rtti_type;
  hpacc_abi_ops.rtti_type = hpacc_value_rtti_type;
  /* It seems that this function is specific to GNU G++ < 3.0.
  /* It seems that this function is specific to GNU G++ < 3.0.
     However, it is called for data members even in the HP
     However, it is called for data members even in the HP
     case (although not for member functions).
     case (although not for member functions).
     FIXME: Is that correct?  */
     FIXME: Is that correct?  */
  hpacc_abi_ops.baseclass_offset = gnuv2_baseclass_offset;
  hpacc_abi_ops.baseclass_offset = gnuv2_baseclass_offset;
}
}
 
 
 
 
void
void
_initialize_hpacc_abi (void)
_initialize_hpacc_abi (void)
{
{
  init_hpacc_ops ();
  init_hpacc_ops ();
 
 
  regcomp (&constructor_pattern,
  regcomp (&constructor_pattern,
           "^This will never match anything, please fill it in$", REG_NOSUB);
           "^This will never match anything, please fill it in$", REG_NOSUB);
 
 
  regcomp (&destructor_pattern,
  regcomp (&destructor_pattern,
           "^This will never match anything, please fill it in$", REG_NOSUB);
           "^This will never match anything, please fill it in$", REG_NOSUB);
 
 
  regcomp (&operator_pattern,
  regcomp (&operator_pattern,
           "^This will never match anything, please fill it in$", REG_NOSUB);
           "^This will never match anything, please fill it in$", REG_NOSUB);
 
 
  register_cp_abi (hpacc_abi_ops);
  register_cp_abi (hpacc_abi_ops);
}
}
 
 

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