gdb-2.8.1

1 files changed, 145 insertions, 3 deletions

diff --git a/gdb/values.c b/gdb/values.c
index b9c55df..0d5fc27 100644
--- a/gdb/values.c
+++ b/gdb/values.c
@@ -425,7 +425,12 @@ value_as_double (val)
 /* Unpack raw data (copied from debugee) at VALADDR
    as a long, or as a double, assuming the raw data is described
    by type TYPE.  Knows how to convert different sizes of values
-   and can convert between fixed and floating point.  */
+   and can convert between fixed and floating point.
+
+   C++: It is assumed that the front-end has taken care of
+   all matters concerning pointers to members.  A pointer
+   to member which reaches here is considered to be equivalent
+   to an INT (or some size).  After all, it is only an offset.  */
 
 long
 unpack_long (type, valaddr)
@@ -474,11 +479,14 @@ unpack_long (type, valaddr)
       if (len == sizeof (long))
 	return * (long *) valaddr;
     }
-  else if (code == TYPE_CODE_PTR)
+  else if (code == TYPE_CODE_PTR
+	   || code == TYPE_CODE_REF)
     {
       if (len == sizeof (char *))
 	return (CORE_ADDR) * (char **) valaddr;
     }
+  else if (code == TYPE_CODE_MEMBER)
+    error ("not impelmented: member types in unpack_long");
 
   error ("Value not integer or pointer.");
 }
@@ -543,7 +551,9 @@ unpack_double (type, valaddr)
 
 /* Given a value ARG1 of a struct or union type,
    extract and return the value of one of its fields.
-   FIELDNO says which field.  */
+   FIELDNO says which field.
+
+   For C++, must also be able to return values from static fields.  */
 
 value
 value_field (arg1, fieldno)
@@ -581,6 +591,138 @@ value_field (arg1, fieldno)
   return v;
 }
 
+value
+value_fn_field (arg1, fieldno, subfieldno)
+     register value arg1;
+     register int fieldno;
+{
+  register value v;
+  struct fn_field *f = TYPE_FN_FIELDLIST1 (VALUE_TYPE (arg1), fieldno);
+  register struct type *type = TYPE_FN_FIELD_TYPE (f, subfieldno);
+  struct symbol *sym;
+
+  sym = lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, subfieldno),
+		       0, VAR_NAMESPACE);
+  if (! sym) error ("Internal error: could not find physical method named %s",
+		    TYPE_FN_FIELD_PHYSNAME (f, subfieldno));
+  
+  v = allocate_value (type);
+  VALUE_ADDRESS (v) = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
+  VALUE_TYPE (v) = type;
+  return v;
+}
+
+/* Return a virtual function as a value.
+   ARG1 is the object which provides the virtual function
+   table pointer.
+   F is the list of member functions which contains the desired virtual
+   function.
+   J is an index into F which provides the desired virtual function.
+   TYPE is the basetype which first provides the virtual function table.  */
+value
+value_virtual_fn_field (arg1, f, j, type)
+     value arg1;
+     struct fn_field *f;
+     int j;
+     struct type *type;
+{
+  /* First, get the virtual function table pointer.  That comes
+     with a strange type, so cast it to type `pointer to long' (which
+     should serve just fine as a function type).  Then, index into
+     the table, and convert final value to appropriate function type.  */
+  value vfn, vtbl;
+  value vi = value_from_long (builtin_type_int, TYPE_FN_FIELD_VOFFSET (f, j));
+  VALUE_TYPE (arg1) = TYPE_VPTR_BASETYPE (type);
+
+  /* This type may have been defined before its virtual function table
+     was.  If so, fill in the virtual function table entry for the
+     type now.  */
+  if (TYPE_VPTR_FIELDNO (type) < 0)
+    TYPE_VPTR_FIELDNO (type)
+      = fill_in_vptr_fieldno (type);
+
+  /* Pretend that this array is just an array of pointers to integers.
+     This will have to change for multiple inheritance.  */
+  vtbl = value_copy (value_field (arg1, TYPE_VPTR_FIELDNO (type)));
+  VALUE_TYPE (vtbl) = lookup_pointer_type (builtin_type_int);
+
+  /* Index into the virtual function table.  */
+  vfn = value_subscript (vtbl, vi);
+
+  /* Reinstantiate the function pointer with the correct type.  */
+  VALUE_TYPE (vfn) = lookup_pointer_type (TYPE_FN_FIELD_TYPE (f, j));
+  return vfn;
+}
+
+/* The value of a static class member does not depend
+   on its instance, only on its type.  If FIELDNO >= 0,
+   then fieldno is a valid field number and is used directly.
+   Otherwise, FIELDNAME is the name of the field we are
+   searching for.  If it is not a static field name, an
+   error is signaled.  TYPE is the type in which we look for the
+   static field member.  */
+value
+value_static_field (type, fieldname, fieldno)
+     register struct type *type;
+     char *fieldname;
+     register int fieldno;
+{
+  register value v;
+  struct symbol *sym;
+
+  if (fieldno < 0)
+    {
+      register struct type *t = type;
+      /* Look for static field.  */
+      while (t)
+	{
+	  int i;
+	  for (i = TYPE_NFIELDS (t) - 1; i >= 0; i--)
+	    if (! strcmp (TYPE_FIELD_NAME (t, i), fieldname))
+	      {
+		if (TYPE_FIELD_STATIC (t, i))
+		  {
+		    fieldno = i;
+		    goto found;
+		  }
+		else
+		  error ("field `%s' is not static");
+	      }
+	  t = TYPE_BASECLASS (t, 1);
+	}
+
+      t = type;
+
+      if (destructor_name_p (fieldname, t))
+	error ("use `info method' command to print out value of destructor");
+
+      while (t)
+	{
+	  int i, j;
+
+	  for (i = TYPE_NFN_FIELDS (t) - 1; i >= 0; i--)
+	    {
+	      if (! strcmp (TYPE_FN_FIELDLIST_NAME (t, i), fieldname))
+		{
+		  error ("use `info method' command to print value of method \"%s\"", fieldname);
+		}
+	    }
+	  t = TYPE_BASECLASS (t, 1);
+	}
+      error("there is no field named %s", fieldname);
+    }
+
+ found:
+
+  sym = lookup_symbol (TYPE_FIELD_STATIC_PHYSNAME (type, fieldno),
+		       0, VAR_NAMESPACE);
+  if (! sym) error ("Internal error: could not find physical static variable named %s", TYPE_FIELD_BITSIZE (type, fieldno));
+
+  type = TYPE_FIELD_TYPE (type, fieldno);
+  v = value_at (type, (CORE_ADDR)SYMBOL_BLOCK_VALUE (sym));
+  return v;
+}
+
 long
 unpack_field_as_long (type, valaddr, fieldno)
      struct type *type;