Initial revision

1 files changed, 1088 insertions, 0 deletions

diff --git a/gdb/jv-lang.c b/gdb/jv-lang.c
new file mode 100644
index 00000000000..a98147aaf49
--- /dev/null
+++ b/gdb/jv-lang.c
@@ -0,0 +1,1088 @@
+/* Java language support routines for GDB, the GNU debugger.
+   Copyright 1997, 1998, 1999 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 "symtab.h"
+#include "gdbtypes.h"
+#include "expression.h"
+#include "parser-defs.h"
+#include "language.h"
+#include "gdbtypes.h"
+#include "symtab.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "gdb_string.h"
+#include "value.h"
+#include "c-lang.h"
+#include "jv-lang.h"
+#include "gdbcore.h"
+#include <ctype.h>
+
+struct type *java_int_type;
+struct type *java_byte_type;
+struct type *java_short_type;
+struct type *java_long_type;
+struct type *java_boolean_type;
+struct type *java_char_type;
+struct type *java_float_type;
+struct type *java_double_type;
+struct type *java_void_type;
+
+static int java_demangled_signature_length PARAMS ((char*));
+static void java_demangled_signature_copy PARAMS ((char*, char*));
+
+static void java_emit_char PARAMS ((int c, GDB_FILE *stream, int quoter));
+
+/* This objfile contains symtabs that have been dynamically created
+   to record dynamically loaded Java classes and dynamically
+   compiled java methods. */
+
+static struct objfile *dynamics_objfile = NULL;
+
+static struct type *java_link_class_type PARAMS ((struct type *, value_ptr));
+
+static struct objfile *
+get_dynamics_objfile ()
+{
+  if (dynamics_objfile == NULL)
+    {
+      dynamics_objfile = allocate_objfile (NULL, 0, 0, 0);
+    }
+  return dynamics_objfile;
+}
+
+#if 1
+/* symtab contains classes read from the inferior. */
+
+static struct symtab *class_symtab = NULL;
+
+/* Maximum number of class in class_symtab before relocation is needed. */
+
+static int class_symtab_space;
+
+struct symtab *
+get_java_class_symtab ()
+{
+  if (class_symtab == NULL)
+    {
+      struct objfile *objfile = get_dynamics_objfile();
+      struct blockvector *bv;
+      struct block *bl;
+      class_symtab = allocate_symtab ("<java-classes>", objfile);
+      class_symtab->language = language_java;
+      bv = (struct blockvector *)
+	obstack_alloc (&objfile->symbol_obstack, sizeof (struct blockvector));
+      BLOCKVECTOR_NBLOCKS (bv) = 1;
+      BLOCKVECTOR (class_symtab) = bv;
+
+      /* Allocate dummy STATIC_BLOCK. */
+      bl = (struct block *)
+	obstack_alloc (&objfile->symbol_obstack, sizeof (struct block));
+      BLOCK_NSYMS (bl) = 0;
+      BLOCK_START (bl) = 0;
+      BLOCK_END (bl) = 0;
+      BLOCK_FUNCTION (bl) = NULL;
+      BLOCK_SUPERBLOCK (bl) = NULL;
+      BLOCK_GCC_COMPILED (bl) = 0;
+      BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl;
+
+      /* Allocate GLOBAL_BLOCK.  This has to be relocatable. */
+      class_symtab_space = 128;
+      bl = (struct block *)
+	mmalloc (objfile->md,
+		 sizeof (struct block)
+		 + ((class_symtab_space - 1) * sizeof (struct symbol *)));
+      *bl = *BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
+      BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
+      class_symtab->free_ptr = (char *) bl;
+    }
+  return class_symtab;
+}
+
+static void
+add_class_symtab_symbol (sym)
+     struct symbol *sym;
+{
+  struct symtab *symtab = get_java_class_symtab ();
+  struct blockvector *bv = BLOCKVECTOR (symtab);
+  struct block *bl = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
+  if (BLOCK_NSYMS (bl) >= class_symtab_space)
+    {
+      /* Need to re-allocate. */
+      class_symtab_space *= 2;
+      bl = (struct block *)
+	mrealloc (symtab->objfile->md, bl,
+		  sizeof (struct block)
+		  + ((class_symtab_space - 1) * sizeof (struct symbol *)));
+      class_symtab->free_ptr = (char *) bl;
+      BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
+    }
+  
+  BLOCK_SYM (bl, BLOCK_NSYMS (bl)) = sym;
+  BLOCK_NSYMS (bl) = BLOCK_NSYMS (bl) + 1;
+}
+
+static struct symbol * add_class_symbol PARAMS ((struct type *type, CORE_ADDR addr));
+
+static struct symbol *
+add_class_symbol (type, addr)
+     struct type *type;
+     CORE_ADDR addr;
+{
+  struct symbol *sym;
+  sym = (struct symbol *)
+    obstack_alloc (&dynamics_objfile->symbol_obstack, sizeof (struct symbol));
+  memset (sym, 0, sizeof (struct symbol));
+  SYMBOL_LANGUAGE (sym) = language_java;
+  SYMBOL_NAME (sym) = TYPE_TAG_NAME (type);
+  SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+  /*  SYMBOL_VALUE (sym) = valu;*/
+  SYMBOL_TYPE (sym) = type;
+  SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
+  SYMBOL_VALUE_ADDRESS (sym) = addr;
+  return sym;
+}
+#endif
+
+struct type *
+java_lookup_class (name)
+     char *name;
+{
+  struct symbol *sym;
+  sym = lookup_symbol (name, expression_context_block, STRUCT_NAMESPACE,
+		       (int *) 0, (struct symtab **) NULL);
+  if (sym != NULL)
+    return SYMBOL_TYPE (sym);
+#if 0
+  CORE_ADDR addr;
+  if (called from parser)
+    {
+      call lookup_class (or similar) in inferior;
+      if not found:
+	return NULL;
+      addr = found in inferior;
+    }
+  else
+    addr = 0;
+  struct type *type;
+  type = alloc_type (objfile);
+  TYPE_CODE (type) = TYPE_CODE_STRUCT;
+  INIT_CPLUS_SPECIFIC (type);
+  TYPE_TAG_NAME (type) = obsavestring (name, strlen(name), &objfile->type_obstack);
+  TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
+  TYPE ? = addr;
+  return type;
+#else
+  /* FIXME - should search inferior's symbol table. */
+  return NULL;
+#endif
+}
+
+/* Return a nul-terminated string (allocated on OBSTACK) for
+   a name given by NAME (which has type Utf8Const*). */
+
+char *
+get_java_utf8_name (obstack, name)
+     struct obstack *obstack;
+     value_ptr name;
+{
+  char *chrs;
+  value_ptr temp = name;
+  int name_length;
+  CORE_ADDR data_addr;
+  temp = value_struct_elt (&temp, NULL, "length", NULL, "structure");
+  name_length = (int) value_as_long (temp);
+  data_addr = VALUE_ADDRESS (temp) + VALUE_OFFSET (temp)
+    + TYPE_LENGTH (VALUE_TYPE (temp));
+  chrs = obstack_alloc (obstack, name_length+1);
+  chrs [name_length] = '\0';
+  read_memory_section (data_addr, chrs, name_length, NULL);
+  return chrs;
+}
+
+value_ptr
+java_class_from_object (obj_val)
+     value_ptr obj_val;
+{
+  /* This is all rather inefficient, since the offsets of vtable and
+     class are fixed.  FIXME */
+  value_ptr vtable_val;
+
+  if (TYPE_CODE (VALUE_TYPE (obj_val)) == TYPE_CODE_PTR
+      && TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (obj_val))) == 0)
+    obj_val = value_at (get_java_object_type (),
+			value_as_pointer (obj_val), NULL);
+
+  vtable_val = value_struct_elt (&obj_val, NULL, "vtable", NULL, "structure");
+  return value_struct_elt (&vtable_val, NULL, "class", NULL, "structure");
+}
+
+/* Check if CLASS_IS_PRIMITIVE(value of clas): */
+int
+java_class_is_primitive (clas)
+     value_ptr clas;
+{
+  value_ptr vtable = value_struct_elt (&clas, NULL, "vtable", NULL, "struct");
+  CORE_ADDR i = value_as_pointer (vtable);
+  return (int) (i & 0x7fffffff) == (int) 0x7fffffff;
+}
+
+/* Read a GCJ Class object, and generated a gdb (TYPE_CODE_STRUCT) type. */
+
+struct type *
+type_from_class (clas)
+     value_ptr clas;
+{
+  struct type *type;
+  char *name;
+  value_ptr temp;
+  struct objfile *objfile;
+  value_ptr utf8_name;
+  char *nptr;
+  CORE_ADDR addr;
+  struct block *bl;
+  int i;
+  int is_array = 0;
+
+  type = check_typedef (VALUE_TYPE (clas));
+  if (TYPE_CODE (type) == TYPE_CODE_PTR)
+    {
+      if (value_logical_not (clas))
+	return NULL;
+      clas = value_ind (clas);
+    }
+  addr = VALUE_ADDRESS (clas) + VALUE_OFFSET (clas);
+
+#if 0
+  get_java_class_symtab ();
+  bl = BLOCKVECTOR_BLOCK (BLOCKVECTOR (class_symtab), GLOBAL_BLOCK);
+  for (i = BLOCK_NSYMS (bl);  --i >= 0; )
+    {
+      struct symbol *sym = BLOCK_SYM (bl, i);
+      if (SYMBOL_VALUE_ADDRESS (sym) == addr)
+	return SYMBOL_TYPE (sym);
+    }
+#endif
+
+  objfile = get_dynamics_objfile();
+  if (java_class_is_primitive (clas))
+    {
+      value_ptr sig;
+      temp = clas;
+      sig = value_struct_elt (&temp, NULL, "method_count", NULL, "structure");
+      return java_primitive_type (value_as_long (sig));
+    }
+
+  /* Get Class name. */
+  /* if clasloader non-null, prepend loader address. FIXME */
+  temp = clas;
+  utf8_name = value_struct_elt (&temp, NULL, "name", NULL, "structure");
+  name = get_java_utf8_name (&objfile->type_obstack, utf8_name);
+  for (nptr = name;  *nptr != 0;  nptr++)
+    {
+      if (*nptr == '/')
+	*nptr = '.';
+    }
+
+  type = java_lookup_class (name);
+  if (type != NULL)
+    return type;
+
+  type = alloc_type (objfile);
+  TYPE_CODE (type) = TYPE_CODE_STRUCT;
+  INIT_CPLUS_SPECIFIC (type);
+
+  if (name[0] == '[')
+    {
+      char *signature = name;
+      int namelen = java_demangled_signature_length (signature);
+      if (namelen > strlen (name))
+	name = obstack_alloc (&objfile->type_obstack, namelen+1);
+      java_demangled_signature_copy (name, signature);
+      name[namelen] = '\0';
+      is_array = 1;
+      temp = clas;
+      /* Set array element type. */
+      temp = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
+      VALUE_TYPE (temp) = lookup_pointer_type (VALUE_TYPE (clas));
+      TYPE_TARGET_TYPE (type) = type_from_class (temp);
+    }
+
+  ALLOCATE_CPLUS_STRUCT_TYPE (type);
+  TYPE_TAG_NAME (type) = name;
+
+  add_class_symtab_symbol (add_class_symbol (type, addr));
+  return java_link_class_type (type, clas);
+}
+
+/* Fill in class TYPE with data from the CLAS value. */ 
+
+struct type *
+java_link_class_type (type, clas)
+     struct type *type;
+     value_ptr clas;
+{
+  value_ptr temp;
+  char *unqualified_name;
+  char *name = TYPE_TAG_NAME (type);
+  int ninterfaces, nfields, nmethods;
+  int type_is_object = 0;
+  struct fn_field *fn_fields;
+  struct fn_fieldlist *fn_fieldlists;
+  value_ptr fields, field, method, methods;
+  int i, j;
+  struct objfile *objfile = get_dynamics_objfile();
+  struct type *tsuper;
+
+  unqualified_name = strrchr (name, '.');
+  if (unqualified_name == NULL)
+    unqualified_name = name;
+
+  temp = clas;
+  temp = value_struct_elt (&temp, NULL, "superclass", NULL, "structure");
+  if (name != NULL && strcmp (name, "java.lang.Object") == 0)
+    {
+      tsuper = get_java_object_type ();
+      if (tsuper && TYPE_CODE (tsuper) == TYPE_CODE_PTR)
+	tsuper = TYPE_TARGET_TYPE (tsuper);
+      type_is_object = 1;
+    }
+  else
+    tsuper = type_from_class (temp);
+
+#if 1
+  ninterfaces = 0;
+#else
+  temp = clas;
+  ninterfaces = value_as_long (value_struct_elt (&temp, NULL, "interface_len", NULL, "structure"));
+#endif
+  TYPE_N_BASECLASSES (type) = (tsuper == NULL ? 0 : 1) + ninterfaces;
+  temp = clas;
+  nfields = value_as_long (value_struct_elt (&temp, NULL, "field_count", NULL, "structure"));
+  nfields += TYPE_N_BASECLASSES (type);
+  nfields++;  /* Add one for dummy "class" field. */
+  TYPE_NFIELDS (type) = nfields;
+  TYPE_FIELDS (type) = (struct field *)
+    TYPE_ALLOC (type, sizeof (struct field) * nfields);
+
+  memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
+
+  TYPE_FIELD_PRIVATE_BITS (type) =
+    (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
+  B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
+
+  TYPE_FIELD_PROTECTED_BITS (type) =
+    (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
+  B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
+
+  TYPE_FIELD_IGNORE_BITS (type) =
+    (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
+  B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
+
+  TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
+    TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
+  B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
+
+  if (tsuper != NULL)
+    {
+      TYPE_BASECLASS (type, 0) = tsuper;
+      if (type_is_object)
+	SET_TYPE_FIELD_PRIVATE (type, 0);
+    }
+
+  i = strlen (name);
+  if (i > 2 && name[i-1] == ']' && tsuper != NULL)
+    {
+      /* FIXME */
+      TYPE_LENGTH (type) = TYPE_LENGTH (tsuper) + 4;  /* size with "length" */
+    }
+  else
+    {
+      temp = clas;
+      temp = value_struct_elt (&temp, NULL, "size_in_bytes", NULL, "structure");
+      TYPE_LENGTH (type) = value_as_long (temp);
+    }
+
+  fields = NULL;
+  nfields--;  /* First set up dummy "class" field. */
+  SET_FIELD_PHYSADDR (TYPE_FIELD (type, nfields),
+		      VALUE_ADDRESS (clas) + VALUE_OFFSET (clas));
+  TYPE_FIELD_NAME (type, nfields) = "class";
+  TYPE_FIELD_TYPE (type, nfields) = VALUE_TYPE (clas);
+  SET_TYPE_FIELD_PRIVATE (type, nfields);
+  
+  for (i = TYPE_N_BASECLASSES (type);  i < nfields;  i++)
+    {
+      int accflags;
+      int boffset;
+      if (fields == NULL)
+	{
+	  temp = clas;
+	  fields = value_struct_elt (&temp, NULL, "fields", NULL, "structure");
+	  field = value_ind (fields);
+	}
+      else
+	{ /* Re-use field value for next field. */
+	  VALUE_ADDRESS (field) += TYPE_LENGTH (VALUE_TYPE (field));
+	  VALUE_LAZY (field) = 1;
+	}
+      temp = field;
+      temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
+      TYPE_FIELD_NAME (type, i) =
+	get_java_utf8_name (&objfile->type_obstack, temp);
+      temp = field;
+      accflags = value_as_long (value_struct_elt (&temp, NULL, "accflags",
+						  NULL, "structure"));
+      temp = field;
+      temp = value_struct_elt (&temp, NULL, "info", NULL, "structure");
+      boffset = value_as_long (value_struct_elt (&temp, NULL, "boffset",
+						  NULL, "structure"));
+      if (accflags & 0x0001) /* public access */
+	{
+	  /* ??? */
+	}
+      if (accflags & 0x0002) /* private access */
+	{
+	  SET_TYPE_FIELD_PRIVATE (type, i);
+	}
+      if (accflags & 0x0004) /* protected access */
+	{
+	  SET_TYPE_FIELD_PROTECTED (type, i);
+	}
+      if (accflags & 0x0008)  /* ACC_STATIC */
+	SET_FIELD_PHYSADDR(TYPE_FIELD(type, i), boffset);
+      else
+	TYPE_FIELD_BITPOS (type, i) = 8 * boffset;
+      if (accflags & 0x8000) /* FIELD_UNRESOLVED_FLAG */
+	{
+	  TYPE_FIELD_TYPE (type, i) = get_java_object_type (); /* FIXME */
+	}
+      else
+	{
+	  struct type *ftype;
+	  temp = field;
+	  temp = value_struct_elt (&temp, NULL, "type", NULL, "structure");
+	  ftype = type_from_class (temp);
+	  if (TYPE_CODE (ftype) == TYPE_CODE_STRUCT)
+	    ftype = lookup_pointer_type (ftype);
+	  TYPE_FIELD_TYPE (type, i) = ftype;
+	}
+    }
+
+  temp = clas;
+  nmethods = value_as_long (value_struct_elt (&temp, NULL, "method_count",
+					      NULL, "structure"));
+  TYPE_NFN_FIELDS_TOTAL (type) = nmethods;
+  j = nmethods * sizeof (struct fn_field);
+  fn_fields = (struct fn_field*)
+    obstack_alloc (&dynamics_objfile->symbol_obstack, j);
+  memset (fn_fields, 0, j);
+  fn_fieldlists = (struct fn_fieldlist*)
+    alloca (nmethods * sizeof (struct fn_fieldlist));
+
+  methods = NULL;
+  for (i = 0;  i < nmethods;  i++)
+    {
+      char *mname;
+      int k;
+      if (methods == NULL)
+	{
+	  temp = clas;
+	  methods = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
+	  method = value_ind (methods);
+	}
+      else
+	{ /* Re-use method value for next method. */
+	  VALUE_ADDRESS (method) += TYPE_LENGTH (VALUE_TYPE (method));
+	  VALUE_LAZY (method) = 1;
+	}
+
+      /* Get method name. */
+      temp = method;
+      temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
+      mname = get_java_utf8_name (&objfile->type_obstack, temp);
+      if (strcmp (mname, "<init>") == 0)
+	mname = unqualified_name;
+
+      /* Check for an existing method with the same name.
+       * This makes building the fn_fieldslists an O(nmethods**2)
+       * operation.  That could be using hashing, but I doubt it
+       * is worth it.  Note that we do maintain the order of methods
+       * in the inferior's Method table (as long as that is grouped
+       * by method name), which I think is desirable.  --PB */
+      for (k = 0, j = TYPE_NFN_FIELDS (type);  ; )
+	{
+	  if (--j < 0)
+	    { /* No match - new method name. */
+	      j = TYPE_NFN_FIELDS(type)++;
+	      fn_fieldlists[j].name = mname;
+	      fn_fieldlists[j].length = 1;
+	      fn_fieldlists[j].fn_fields = &fn_fields[i];
+	      k = i;
+	      break;
+	    }
+	  if (strcmp (mname, fn_fieldlists[j].name) == 0)
+	    { /* Found an existing method with the same name. */
+	      int l;
+	      if (mname != unqualified_name)
+		obstack_free (&objfile->type_obstack, mname);
+	      mname = fn_fieldlists[j].name;
+	      fn_fieldlists[j].length++;
+	      k = i - k;  /* Index of new slot. */
+	      /* Shift intervening fn_fields (between k and i) down. */
+	      for (l = i;  l > k;  l--) fn_fields[l] = fn_fields[l-1];
+	      for (l = TYPE_NFN_FIELDS (type);  --l > j; )
+		fn_fieldlists[l].fn_fields++;
+	      break;
+	    }
+	  k += fn_fieldlists[j].length;
+	}
+      fn_fields[k].physname = "";
+      fn_fields[k].is_stub = 1;
+      fn_fields[k].type = make_function_type (java_void_type, NULL); /* FIXME*/
+      TYPE_CODE (fn_fields[k].type) = TYPE_CODE_METHOD;
+    }
+
+  j = TYPE_NFN_FIELDS(type) * sizeof (struct fn_fieldlist);
+  TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist*)
+    obstack_alloc (&dynamics_objfile->symbol_obstack, j);
+  memcpy (TYPE_FN_FIELDLISTS (type), fn_fieldlists, j);
+ 
+  return type;
+}
+
+static struct type *java_object_type;
+
+struct type *
+get_java_object_type ()
+{
+  if (java_object_type == NULL)
+    {
+      struct symbol *sym;
+      sym = lookup_symbol ("java.lang.Object", NULL, STRUCT_NAMESPACE,
+			   (int *) 0, (struct symtab **) NULL);
+      if (sym == NULL)
+	error ("cannot find java.lang.Object");
+      java_object_type = SYMBOL_TYPE (sym);
+    }
+  return java_object_type;
+}
+
+int
+get_java_object_header_size ()
+{
+  struct type *objtype = get_java_object_type ();
+  if (objtype == NULL)
+    return (2 * TARGET_PTR_BIT / TARGET_CHAR_BIT);
+  else
+    return TYPE_LENGTH (objtype);
+}
+
+int
+is_object_type (type)
+     struct type *type;
+{
+  CHECK_TYPEDEF (type);
+  if (TYPE_CODE (type) == TYPE_CODE_PTR)
+    {
+      struct type *ttype = check_typedef (TYPE_TARGET_TYPE (type));
+      char *name;
+      if (TYPE_CODE (ttype) != TYPE_CODE_STRUCT)
+	return 0;
+      while (TYPE_N_BASECLASSES (ttype) > 0)
+	ttype = TYPE_BASECLASS (ttype, 0);
+      name = TYPE_TAG_NAME (ttype);
+      if (name != NULL && strcmp (name, "java.lang.Object") == 0)
+	return 1;
+      name = TYPE_NFIELDS (ttype) > 0 ? TYPE_FIELD_NAME (ttype, 0) : (char*)0;
+      if (name != NULL && strcmp (name, "vtable") == 0)
+	{
+	  if (java_object_type == NULL)
+	    java_object_type = type;
+	  return 1;
+	}
+    }
+  return 0;
+}
+
+struct type *
+java_primitive_type (signature)
+     int signature;
+{
+  switch (signature)
+    {
+    case 'B':  return java_byte_type;
+    case 'S':  return java_short_type;
+    case 'I':  return java_int_type;
+    case 'J':  return java_long_type;
+    case 'Z':  return java_boolean_type;
+    case 'C':  return java_char_type;
+    case 'F':  return java_float_type;
+    case 'D':  return java_double_type;
+    case 'V':  return java_void_type;
+    }
+  error ("unknown signature '%c' for primitive type", (char) signature);
+}
+
+/* If name[0 .. namelen-1] is the name of a primitive Java type,
+   return that type.  Otherwise, return NULL. */
+
+struct type *
+java_primitive_type_from_name (name, namelen)
+     char* name;
+     int namelen;
+{
+  switch (name[0])
+    {
+    case 'b':
+      if (namelen == 4 && memcmp (name, "byte", 4) == 0)
+	return java_byte_type;
+      if (namelen == 7 && memcmp (name, "boolean", 7) == 0)
+	return java_boolean_type;
+      break;
+    case 'c':
+      if (namelen == 4 && memcmp (name, "char", 4) == 0)
+	return java_char_type;
+    case 'd':
+      if (namelen == 6 && memcmp (name, "double", 6) == 0)
+	return java_double_type;
+      break;
+    case 'f':
+      if (namelen == 5 && memcmp (name, "float", 5) == 0)
+	return java_float_type;
+      break;
+    case 'i':
+      if (namelen == 3 && memcmp (name, "int", 3) == 0)
+	return java_int_type;
+      break;
+    case 'l':
+      if (namelen == 4 && memcmp (name, "long", 4) == 0)
+	return java_long_type;
+      break;
+    case 's':
+      if (namelen == 5 && memcmp (name, "short", 5) == 0)
+	return java_short_type;
+      break;
+    case 'v':
+      if (namelen == 4 && memcmp (name, "void", 4) == 0)
+	return java_void_type;
+      break;
+    }
+  return NULL;
+}
+
+/* Return the length (in bytes) of demangled name of the Java type
+   signature string SIGNATURE. */
+
+static int
+java_demangled_signature_length (signature)
+     char *signature;
+{
+  int array = 0;
+  for (; *signature == '[';  signature++)
+    array += 2;  /* Two chars for "[]". */
+  switch (signature[0])
+    {
+    case 'L':
+      /* Subtract 2 for 'L' and ';'. */
+      return strlen (signature) - 2 + array;
+    default:
+      return strlen (TYPE_NAME (java_primitive_type (signature[0]))) + array;
+    }
+}
+
+/* Demangle the Java type signature SIGNATURE, leaving the result in RESULT. */
+
+static void
+java_demangled_signature_copy (result, signature)
+     char *result;
+     char *signature;
+{
+  int array = 0;
+  char *ptr;
+  int i;
+  while (*signature == '[')
+    {
+      array++;
+      signature++;
+    }
+  switch (signature[0])
+    {
+    case 'L':
+      /* Subtract 2 for 'L' and ';', but add 1 for final nul. */
+      signature++;
+      ptr = result;
+      for ( ; *signature != ';' && *signature != '\0'; signature++)
+	{
+	  if (*signature == '/')
+	    *ptr++ = '.';
+	  else
+	    *ptr++ = *signature;
+	}
+      break;
+    default:
+      ptr = TYPE_NAME (java_primitive_type (signature[0]));
+      i = strlen (ptr);
+      strcpy (result, ptr);
+      ptr = result + i;
+      break;
+    }
+  while (--array >= 0)
+    {
+      *ptr++ = '[';
+      *ptr++ = ']';
+    }
+}
+
+/* Return the demangled name of the Java type signature string SIGNATURE,
+   as a freshly allocated copy. */
+
+char *
+java_demangle_type_signature (signature)
+     char *signature;
+{
+  int length = java_demangled_signature_length (signature);
+  char *result = xmalloc (length + 1);
+  java_demangled_signature_copy (result, signature);
+  result[length] = '\0';
+  return result;
+}
+
+struct type *
+java_lookup_type (signature)
+     char *signature;
+{
+  switch (signature[0])
+    {
+    case 'L':
+    case '[':
+      error ("java_lookup_type not fully implemented");
+    default:
+      return java_primitive_type (signature[0]);
+    }
+}
+
+/* Return the type of TYPE followed by DIMS pairs of [ ].
+   If DIMS == 0, TYPE is returned. */
+
+struct type *
+java_array_type (type, dims)
+     struct type *type;
+     int dims;
+{
+  struct type *range_type;
+
+  while (dims-- > 0)
+    {
+      range_type = create_range_type (NULL, builtin_type_int, 0, 0);
+      /* FIXME  This is bogus!  Java arrays are not gdb arrays! */
+      type = create_array_type (NULL, type, range_type);
+    }
+
+  return type;
+}
+
+/* Create a Java string in the inferior from a (Utf8) literal. */
+
+value_ptr
+java_value_string (ptr, len)
+     char *ptr;
+     int len;
+{
+  error ("not implemented - java_value_string"); /* FIXME */
+}
+
+/* Print the character C on STREAM as part of the contents of a literal
+   string whose delimiter is QUOTER.  Note that that format for printing
+   characters and strings is language specific. */
+
+static void
+java_emit_char (c, stream, quoter)
+     int c;
+     GDB_FILE *stream;
+     int quoter;
+{
+  switch (c)
+    {
+    case '\\':
+    case '\'':
+      fprintf_filtered (stream, "\\%c", c);
+      break;
+    case '\b':
+      fputs_filtered ("\\b", stream);
+      break;
+    case '\t':
+      fputs_filtered ("\\t", stream);
+      break;
+    case '\n':
+      fputs_filtered ("\\n", stream);
+      break;
+    case '\f':
+      fputs_filtered ("\\f", stream);
+      break;
+    case '\r':
+      fputs_filtered ("\\r", stream);
+      break;
+    default:
+      if (isprint (c))
+	fputc_filtered (c, stream);
+      else
+	fprintf_filtered (stream, "\\u%.4x", (unsigned int) c);
+      break;
+    }
+}
+
+static value_ptr
+evaluate_subexp_java (expect_type, exp, pos, noside)
+     struct type *expect_type;
+     register struct expression *exp;
+     register int *pos;
+     enum noside noside;
+{
+  int pc = *pos;
+  int i;
+  char *name;
+  enum exp_opcode op = exp->elts[*pos].opcode;
+  value_ptr arg1, arg2;
+  struct type *type;
+  switch (op)
+    {
+    case UNOP_IND:
+      if (noside == EVAL_SKIP)
+	goto standard;
+      (*pos)++;
+      arg1 = evaluate_subexp_java (NULL_TYPE, exp, pos, EVAL_NORMAL);
+      if (is_object_type (VALUE_TYPE (arg1)))
+	{
+	  struct type *type;
+
+	  type = type_from_class (java_class_from_object (arg1));
+	  arg1 = value_cast (lookup_pointer_type (type), arg1);
+	}
+      if (noside == EVAL_SKIP)
+	goto nosideret;
+      return value_ind (arg1);
+
+    case BINOP_SUBSCRIPT:
+      (*pos)++;
+      arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
+      arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
+      if (noside == EVAL_SKIP)
+	goto nosideret;
+      /* If the user attempts to subscript something that is not an
+	 array or pointer type (like a plain int variable for example),
+	 then report this as an error. */
+      
+      COERCE_REF (arg1);
+      type = check_typedef (VALUE_TYPE (arg1));
+      if (TYPE_CODE (type) == TYPE_CODE_PTR)
+	type = check_typedef (TYPE_TARGET_TYPE (type));
+      name = TYPE_NAME (type);
+      if (name == NULL)
+	name = TYPE_TAG_NAME (type);
+      i = name == NULL ? 0 : strlen (name);
+      if (TYPE_CODE (type) == TYPE_CODE_STRUCT
+	  && i > 2 && name [i - 1] == ']')
+	{
+	  CORE_ADDR address;
+	  long length, index;
+	  struct type *el_type;
+	  char buf4[4];
+
+	  value_ptr clas = java_class_from_object(arg1);
+	  value_ptr temp = clas;
+	  /* Get CLASS_ELEMENT_TYPE of the array type. */
+	  temp = value_struct_elt (&temp, NULL, "methods",
+				   NULL, "structure"); 
+	  VALUE_TYPE (temp) = VALUE_TYPE (clas);
+	  el_type = type_from_class (temp);
+	  if (TYPE_CODE (el_type) == TYPE_CODE_STRUCT)
+	    el_type = lookup_pointer_type (el_type);
+
+	  if (noside == EVAL_AVOID_SIDE_EFFECTS)
+	    return value_zero (el_type, VALUE_LVAL (arg1));
+	  address = value_as_pointer (arg1);
+	  address += JAVA_OBJECT_SIZE;
+	  read_memory (address, buf4, 4);
+	  length = (long) extract_signed_integer (buf4, 4);
+	  index = (long) value_as_long (arg2);
+	  if (index >= length || index < 0)
+	    error ("array index (%ld) out of bounds (length: %ld)",
+		   index, length);
+	  address = (address + 4) + index * TYPE_LENGTH (el_type);
+	  return value_at (el_type, address, NULL);
+	}
+      else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
+	{
+	  if (noside == EVAL_AVOID_SIDE_EFFECTS)
+	    return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
+	  else
+	    return value_subscript (arg1, arg2);
+	}
+      if (name)
+	error ("cannot subscript something of type `%s'", name);
+      else
+	error ("cannot subscript requested type");
+
+    case OP_STRING:
+      (*pos)++;
+      i = longest_to_int (exp->elts[pc + 1].longconst);
+      (*pos) += 3 + BYTES_TO_EXP_ELEM (i + 1);
+      if (noside == EVAL_SKIP)
+	goto nosideret;
+      return java_value_string (&exp->elts[pc + 2].string, i);
+
+    case STRUCTOP_STRUCT:
+      arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
+      /* Convert object field (such as TYPE.class) to reference. */
+      if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_STRUCT)
+	arg1 = value_addr (arg1);
+      return arg1;
+    default:
+      break;
+    }
+standard:
+  return evaluate_subexp_standard (expect_type, exp, pos, noside);
+ nosideret:
+  return value_from_longest (builtin_type_long, (LONGEST) 1);
+}
+
+static struct type *
+java_create_fundamental_type (objfile, typeid)
+     struct objfile *objfile;
+     int typeid;
+{
+  switch (typeid)
+    {
+    case FT_VOID:           return java_void_type;
+    case FT_BOOLEAN:        return java_boolean_type;
+    case FT_CHAR:           return java_char_type;
+    case FT_FLOAT:          return java_float_type;
+    case FT_DBL_PREC_FLOAT: return java_double_type;
+    case FT_BYTE: case FT_SIGNED_CHAR:       return java_byte_type;
+    case FT_SHORT: case FT_SIGNED_SHORT:     return java_short_type;
+    case FT_INTEGER: case FT_SIGNED_INTEGER: return java_int_type;
+    case FT_LONG: case FT_SIGNED_LONG:       return java_long_type;
+    }
+  return c_create_fundamental_type (objfile, typeid);
+}
+
+/* Table mapping opcodes into strings for printing operators
+   and precedences of the operators.  */
+
+const struct op_print java_op_print_tab[] =
+  {
+    {",",  BINOP_COMMA, PREC_COMMA, 0},
+    {"=",  BINOP_ASSIGN, PREC_ASSIGN, 1},
+    {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
+    {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
+    {"|",  BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
+    {"^",  BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
+    {"&",  BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
+    {"==", BINOP_EQUAL, PREC_EQUAL, 0},
+    {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
+    {"<=", BINOP_LEQ, PREC_ORDER, 0},
+    {">=", BINOP_GEQ, PREC_ORDER, 0},
+    {">",  BINOP_GTR, PREC_ORDER, 0},
+    {"<",  BINOP_LESS, PREC_ORDER, 0},
+    {">>", BINOP_RSH, PREC_SHIFT, 0},
+    {"<<", BINOP_LSH, PREC_SHIFT, 0},
+#if 0
+    {">>>", BINOP_???, PREC_SHIFT, 0},
+#endif
+    {"+",  BINOP_ADD, PREC_ADD, 0},
+    {"-",  BINOP_SUB, PREC_ADD, 0},
+    {"*",  BINOP_MUL, PREC_MUL, 0},
+    {"/",  BINOP_DIV, PREC_MUL, 0},
+    {"%",  BINOP_REM, PREC_MUL, 0},
+    {"-",  UNOP_NEG, PREC_PREFIX, 0},
+    {"!",  UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
+    {"~",  UNOP_COMPLEMENT, PREC_PREFIX, 0},
+    {"*",  UNOP_IND, PREC_PREFIX, 0},
+#if 0
+    {"instanceof", ???, ???, 0},
+#endif
+    {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
+    {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
+    {NULL, 0, 0, 0}
+};
+
+const struct language_defn java_language_defn = {
+  "java",				/* Language name */
+  language_java,
+  c_builtin_types,
+  range_check_off,
+  type_check_off,
+  java_parse,
+  java_error,
+  evaluate_subexp_java,
+  c_printchar,			/* Print a character constant */
+  c_printstr,			/* Function to print string constant */
+  java_emit_char,		/* Function to print a single character */
+  java_create_fundamental_type,	/* Create fundamental type in this language */
+  java_print_type,		/* Print a type using appropriate syntax */
+  java_val_print,		/* Print a value using appropriate syntax */
+  java_value_print,		/* Print a top-level value */
+  {"",      "",    "",   ""},	/* Binary format info */
+  {"0%lo",   "0",   "o",  ""},	/* Octal format info */
+  {"%ld",    "",    "d",  ""},	/* Decimal format info */
+  {"0x%lx",  "0x",  "x",  ""},	/* Hex format info */
+  java_op_print_tab,		/* expression operators for printing */
+  0,				/* not c-style arrays */
+  0,				/* String lower bound */
+  &builtin_type_char,		/* Type of string elements */ 
+  LANG_MAGIC
+};
+
+void
+_initialize_java_language ()
+{
+
+  java_int_type    = init_type (TYPE_CODE_INT,  4, 0, "int", NULL);
+  java_short_type  = init_type (TYPE_CODE_INT,  2, 0, "short", NULL);
+  java_long_type   = init_type (TYPE_CODE_INT,  8, 0, "long", NULL);
+  java_byte_type   = init_type (TYPE_CODE_INT,  1, 0, "byte", NULL);
+  java_boolean_type= init_type (TYPE_CODE_BOOL, 1, 0, "boolean", NULL);
+  java_char_type   = init_type (TYPE_CODE_CHAR, 2, TYPE_FLAG_UNSIGNED, "char", NULL);
+  java_float_type  = init_type (TYPE_CODE_FLT,  4, 0, "float", NULL);
+  java_double_type = init_type (TYPE_CODE_FLT,  8, 0, "double", NULL);
+  java_void_type   = init_type (TYPE_CODE_VOID, 1, 0, "void", NULL);
+
+  add_language (&java_language_defn);
+}
+
+/* Cleanup code that should be run on every "run".
+   We should use make_run_cleanup to have this be called.
+   But will that mess up values in value histry?  FIXME */
+
+void java_rerun_cleanup ()
+{
+  if (class_symtab != NULL)
+    {
+      free_symtab (class_symtab); /* ??? */
+      class_symtab = NULL;
+    }
+  if (dynamics_objfile != NULL)
+    {
+      free_objfile (dynamics_objfile);
+      dynamics_objfile = NULL;
+    }
+
+  java_object_type = NULL;
+}