| /* Support for printing Java values for GDB, the GNU debugger. | 
 |    Copyright 1997, 1998, 1999, 2000 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 "gdbcore.h" | 
 | #include "expression.h" | 
 | #include "value.h" | 
 | #include "demangle.h" | 
 | #include "valprint.h" | 
 | #include "language.h" | 
 | #include "jv-lang.h" | 
 | #include "c-lang.h" | 
 | #include "annotate.h" | 
 | #include "gdb_string.h" | 
 |  | 
 | /* Local functions */ | 
 |  | 
 | static void java_print_value_fields (struct type * type, char *valaddr, | 
 | 				     CORE_ADDR address, | 
 | 				     struct ui_file *stream, int format, | 
 | 				     int recurse, | 
 | 				     enum val_prettyprint pretty); | 
 |  | 
 |  | 
 | int | 
 | java_value_print (struct value *val, struct ui_file *stream, int format, | 
 | 		  enum val_prettyprint pretty) | 
 | { | 
 |   struct type *type; | 
 |   CORE_ADDR address; | 
 |   int i; | 
 |   char *name; | 
 |  | 
 |   type = VALUE_TYPE (val); | 
 |   address = VALUE_ADDRESS (val) + VALUE_OFFSET (val); | 
 |  | 
 |   if (is_object_type (type)) | 
 |     { | 
 |       CORE_ADDR obj_addr; | 
 |  | 
 |       /* Get the run-time type, and cast the object into that */ | 
 |  | 
 |       obj_addr = unpack_pointer (type, VALUE_CONTENTS (val)); | 
 |  | 
 |       if (obj_addr != 0) | 
 | 	{ | 
 | 	  type = type_from_class (java_class_from_object (val)); | 
 | 	  type = lookup_pointer_type (type); | 
 |  | 
 | 	  val = value_at (type, address, NULL); | 
 | 	} | 
 |     } | 
 |  | 
 |   if (TYPE_CODE (type) == TYPE_CODE_PTR && !value_logical_not (val)) | 
 |     type_print (TYPE_TARGET_TYPE (type), "", stream, -1); | 
 |  | 
 |   name = TYPE_TAG_NAME (type); | 
 |   if (TYPE_CODE (type) == TYPE_CODE_STRUCT && name != NULL | 
 |       && (i = strlen (name), name[i - 1] == ']')) | 
 |     { | 
 |       char buf4[4]; | 
 |       long length; | 
 |       unsigned int things_printed = 0; | 
 |       int reps; | 
 |       struct type *el_type = java_primitive_type_from_name (name, i - 2); | 
 |  | 
 |       i = 0; | 
 |       read_memory (address + JAVA_OBJECT_SIZE, buf4, 4); | 
 |  | 
 |       length = (long) extract_signed_integer (buf4, 4); | 
 |       fprintf_filtered (stream, "{length: %ld", length); | 
 |  | 
 |       if (el_type == NULL) | 
 | 	{ | 
 | 	  CORE_ADDR element; | 
 | 	  CORE_ADDR next_element = -1; /* dummy initial value */ | 
 |  | 
 | 	  address += JAVA_OBJECT_SIZE + 4;	/* Skip object header and length. */ | 
 |  | 
 | 	  while (i < length && things_printed < print_max) | 
 | 	    { | 
 | 	      char *buf; | 
 |  | 
 | 	      buf = alloca (TARGET_PTR_BIT / HOST_CHAR_BIT); | 
 | 	      fputs_filtered (", ", stream); | 
 | 	      wrap_here (n_spaces (2)); | 
 |  | 
 | 	      if (i > 0) | 
 | 		element = next_element; | 
 | 	      else | 
 | 		{ | 
 | 		  read_memory (address, buf, sizeof (buf)); | 
 | 		  address += TARGET_PTR_BIT / HOST_CHAR_BIT; | 
 | 		  element = extract_address (buf, sizeof (buf)); | 
 | 		} | 
 |  | 
 | 	      for (reps = 1; i + reps < length; reps++) | 
 | 		{ | 
 | 		  read_memory (address, buf, sizeof (buf)); | 
 | 		  address += TARGET_PTR_BIT / HOST_CHAR_BIT; | 
 | 		  next_element = extract_address (buf, sizeof (buf)); | 
 | 		  if (next_element != element) | 
 | 		    break; | 
 | 		} | 
 |  | 
 | 	      if (reps == 1) | 
 | 		fprintf_filtered (stream, "%d: ", i); | 
 | 	      else | 
 | 		fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1); | 
 |  | 
 | 	      if (element == 0) | 
 | 		fprintf_filtered (stream, "null"); | 
 | 	      else | 
 | 		fprintf_filtered (stream, "@%s", paddr_nz (element)); | 
 |  | 
 | 	      things_printed++; | 
 | 	      i += reps; | 
 | 	    } | 
 | 	} | 
 |       else | 
 | 	{ | 
 | 	  struct value *v = allocate_value (el_type); | 
 | 	  struct value *next_v = allocate_value (el_type); | 
 |  | 
 | 	  VALUE_ADDRESS (v) = address + JAVA_OBJECT_SIZE + 4; | 
 | 	  VALUE_ADDRESS (next_v) = VALUE_ADDRESS (v); | 
 |  | 
 | 	  while (i < length && things_printed < print_max) | 
 | 	    { | 
 | 	      fputs_filtered (", ", stream); | 
 | 	      wrap_here (n_spaces (2)); | 
 |  | 
 | 	      if (i > 0) | 
 | 		{ | 
 | 		  struct value *tmp; | 
 |  | 
 | 		  tmp = next_v; | 
 | 		  next_v = v; | 
 | 		  v = tmp; | 
 | 		} | 
 | 	      else | 
 | 		{ | 
 | 		  VALUE_LAZY (v) = 1; | 
 | 		  VALUE_OFFSET (v) = 0; | 
 | 		} | 
 |  | 
 | 	      VALUE_OFFSET (next_v) = VALUE_OFFSET (v); | 
 |  | 
 | 	      for (reps = 1; i + reps < length; reps++) | 
 | 		{ | 
 | 		  VALUE_LAZY (next_v) = 1; | 
 | 		  VALUE_OFFSET (next_v) += TYPE_LENGTH (el_type); | 
 | 		  if (memcmp (VALUE_CONTENTS (v), VALUE_CONTENTS (next_v), | 
 | 			      TYPE_LENGTH (el_type)) != 0) | 
 | 		    break; | 
 | 		} | 
 |  | 
 | 	      if (reps == 1) | 
 | 		fprintf_filtered (stream, "%d: ", i); | 
 | 	      else | 
 | 		fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1); | 
 |  | 
 | 	      val_print (VALUE_TYPE (v), VALUE_CONTENTS (v), 0, 0, | 
 | 			 stream, format, 2, 1, pretty); | 
 |  | 
 | 	      things_printed++; | 
 | 	      i += reps; | 
 | 	    } | 
 | 	} | 
 |  | 
 |       if (i < length) | 
 | 	fprintf_filtered (stream, "..."); | 
 |  | 
 |       fprintf_filtered (stream, "}"); | 
 |  | 
 |       return 0; | 
 |     } | 
 |  | 
 |   /* If it's type String, print it */ | 
 |  | 
 |   if (TYPE_CODE (type) == TYPE_CODE_PTR | 
 |       && TYPE_TARGET_TYPE (type) | 
 |       && TYPE_NAME (TYPE_TARGET_TYPE (type)) | 
 |       && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "java.lang.String") == 0 | 
 |       && (format == 0 || format == 's') | 
 |       && address != 0 | 
 |       && value_as_address (val) != 0) | 
 |     { | 
 |       struct value *data_val; | 
 |       CORE_ADDR data; | 
 |       struct value *boffset_val; | 
 |       unsigned long boffset; | 
 |       struct value *count_val; | 
 |       unsigned long count; | 
 |       struct value *mark; | 
 |  | 
 |       mark = value_mark ();	/* Remember start of new values */ | 
 |  | 
 |       data_val = value_struct_elt (&val, NULL, "data", NULL, NULL); | 
 |       data = value_as_address (data_val); | 
 |  | 
 |       boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL); | 
 |       boffset = value_as_address (boffset_val); | 
 |  | 
 |       count_val = value_struct_elt (&val, NULL, "count", NULL, NULL); | 
 |       count = value_as_address (count_val); | 
 |  | 
 |       value_free_to_mark (mark);	/* Release unnecessary values */ | 
 |  | 
 |       val_print_string (data + boffset, count, 2, stream); | 
 |  | 
 |       return 0; | 
 |     } | 
 |  | 
 |   return (val_print (type, VALUE_CONTENTS (val), 0, address, | 
 | 		     stream, format, 1, 0, pretty)); | 
 | } | 
 |  | 
 | /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the | 
 |    same meanings as in cp_print_value and c_val_print. | 
 |  | 
 |    DONT_PRINT is an array of baseclass types that we | 
 |    should not print, or zero if called from top level.  */ | 
 |  | 
 | static void | 
 | java_print_value_fields (struct type *type, char *valaddr, CORE_ADDR address, | 
 | 			 struct ui_file *stream, int format, int recurse, | 
 | 			 enum val_prettyprint pretty) | 
 | { | 
 |   int i, len, n_baseclasses; | 
 |  | 
 |   CHECK_TYPEDEF (type); | 
 |  | 
 |   fprintf_filtered (stream, "{"); | 
 |   len = TYPE_NFIELDS (type); | 
 |   n_baseclasses = TYPE_N_BASECLASSES (type); | 
 |  | 
 |   if (n_baseclasses > 0) | 
 |     { | 
 |       int i, n_baseclasses = TYPE_N_BASECLASSES (type); | 
 |  | 
 |       for (i = 0; i < n_baseclasses; i++) | 
 | 	{ | 
 | 	  int boffset; | 
 | 	  struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); | 
 | 	  char *basename = TYPE_NAME (baseclass); | 
 | 	  char *base_valaddr; | 
 |  | 
 | 	  if (BASETYPE_VIA_VIRTUAL (type, i)) | 
 | 	    continue; | 
 |  | 
 | 	  if (basename != NULL && strcmp (basename, "java.lang.Object") == 0) | 
 | 	    continue; | 
 |  | 
 | 	  boffset = 0; | 
 |  | 
 | 	  if (pretty) | 
 | 	    { | 
 | 	      fprintf_filtered (stream, "\n"); | 
 | 	      print_spaces_filtered (2 * (recurse + 1), 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); | 
 |  | 
 | 	  base_valaddr = valaddr; | 
 |  | 
 | 	  java_print_value_fields (baseclass, base_valaddr, address + boffset, | 
 | 				   stream, format, recurse + 1, pretty); | 
 | 	  fputs_filtered (", ", stream); | 
 |  | 
 | 	flush_it: | 
 | 	  ; | 
 | 	} | 
 |  | 
 |     } | 
 |  | 
 |   if (!len && n_baseclasses == 1) | 
 |     fprintf_filtered (stream, "<No data fields>"); | 
 |   else | 
 |     { | 
 |       extern int inspect_it; | 
 |       int fields_seen = 0; | 
 |  | 
 |       for (i = n_baseclasses; i < len; i++) | 
 | 	{ | 
 | 	  /* If requested, skip printing of static fields.  */ | 
 | 	  if (TYPE_FIELD_STATIC (type, i)) | 
 | 	    { | 
 | 	      char *name = TYPE_FIELD_NAME (type, i); | 
 | 	      if (!static_field_print) | 
 | 		continue; | 
 | 	      if (name != NULL && strcmp (name, "class") == 0) | 
 | 		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)) | 
 | 	    { | 
 | 	      struct value *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, | 
 | 			     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)) | 
 | 		{ | 
 | 		  struct value *v = value_static_field (type, i); | 
 | 		  if (v == NULL) | 
 | 		    fputs_filtered ("<optimized out>", stream); | 
 | 		  else | 
 | 		    { | 
 | 		      struct type *t = check_typedef (VALUE_TYPE (v)); | 
 | 		      if (TYPE_CODE (t) == TYPE_CODE_STRUCT) | 
 | 			v = value_addr (v); | 
 | 		      val_print (VALUE_TYPE (v), | 
 | 				 VALUE_CONTENTS (v), 0, VALUE_ADDRESS (v), | 
 | 				 stream, format, 0, recurse + 1, pretty); | 
 | 		    } | 
 | 		} | 
 | 	      else if (TYPE_FIELD_TYPE (type, i) == NULL) | 
 | 		fputs_filtered ("<unknown type>", stream); | 
 | 	      else | 
 | 		{ | 
 | 		  val_print (TYPE_FIELD_TYPE (type, i), | 
 | 			     valaddr + TYPE_FIELD_BITPOS (type, i) / 8, 0, | 
 | 			     address + TYPE_FIELD_BITPOS (type, i) / 8, | 
 | 			     stream, format, 0, recurse + 1, pretty); | 
 | 		} | 
 | 	    } | 
 | 	  annotate_field_end (); | 
 | 	} | 
 |  | 
 |       if (pretty) | 
 | 	{ | 
 | 	  fprintf_filtered (stream, "\n"); | 
 | 	  print_spaces_filtered (2 * recurse, stream); | 
 | 	} | 
 |     } | 
 |   fprintf_filtered (stream, "}"); | 
 | } | 
 |  | 
 | /* Print data of type TYPE located at VALADDR (within GDB), which came from | 
 |    the inferior at address ADDRESS, onto stdio stream STREAM according to | 
 |    FORMAT (a letter or 0 for natural format).  The data at VALADDR is in | 
 |    target byte order. | 
 |  | 
 |    If the data are a string pointer, returns the number of string characters | 
 |    printed. | 
 |  | 
 |    If DEREF_REF is nonzero, then dereference references, otherwise just print | 
 |    them like pointers. | 
 |  | 
 |    The PRETTY parameter controls prettyprinting.  */ | 
 |  | 
 | int | 
 | java_val_print (struct type *type, char *valaddr, int embedded_offset, | 
 | 		CORE_ADDR address, struct ui_file *stream, int format, | 
 | 		int deref_ref, int recurse, enum val_prettyprint pretty) | 
 | { | 
 |   register unsigned int i = 0;	/* Number of characters printed */ | 
 |   struct type *target_type; | 
 |   CORE_ADDR addr; | 
 |  | 
 |   CHECK_TYPEDEF (type); | 
 |   switch (TYPE_CODE (type)) | 
 |     { | 
 |     case TYPE_CODE_PTR: | 
 |       if (format && format != 's') | 
 | 	{ | 
 | 	  print_scalar_formatted (valaddr, type, format, 0, stream); | 
 | 	  break; | 
 | 	} | 
 | #if 0 | 
 |       if (vtblprint && cp_is_vtbl_ptr_type (type)) | 
 | 	{ | 
 | 	  /* Print the unmangled name if desired.  */ | 
 | 	  /* Print vtable entry - we only get here if we ARE using | 
 | 	     -fvtable_thunks.  (Otherwise, look under TYPE_CODE_STRUCT.) */ | 
 | 	  print_address_demangle (extract_address (valaddr, TYPE_LENGTH (type)), | 
 | 				  stream, demangle); | 
 | 	  break; | 
 | 	} | 
 | #endif | 
 |       addr = unpack_pointer (type, valaddr); | 
 |       if (addr == 0) | 
 | 	{ | 
 | 	  fputs_filtered ("null", stream); | 
 | 	  return i; | 
 | 	} | 
 |       target_type = check_typedef (TYPE_TARGET_TYPE (type)); | 
 |  | 
 |       if (TYPE_CODE (target_type) == TYPE_CODE_FUNC) | 
 | 	{ | 
 | 	  /* Try to print what function it points to.  */ | 
 | 	  print_address_demangle (addr, stream, demangle); | 
 | 	  /* Return value is irrelevant except for string pointers.  */ | 
 | 	  return (0); | 
 | 	} | 
 |  | 
 |       if (addressprint && format != 's') | 
 | 	{ | 
 | 	  fputs_filtered ("@", stream); | 
 | 	  print_longest (stream, 'x', 0, (ULONGEST) addr); | 
 | 	} | 
 |  | 
 |       return i; | 
 |  | 
 |     case TYPE_CODE_CHAR: | 
 |     case TYPE_CODE_INT: | 
 |       /* Can't just call c_val_print because that prints bytes as C | 
 | 	 chars.  */ | 
 |       format = format ? format : output_format; | 
 |       if (format) | 
 | 	print_scalar_formatted (valaddr, type, format, 0, stream); | 
 |       else if (TYPE_CODE (type) == TYPE_CODE_CHAR | 
 | 	       || (TYPE_CODE (type) == TYPE_CODE_INT | 
 | 		   && TYPE_LENGTH (type) == 2 | 
 | 		   && strcmp (TYPE_NAME (type), "char") == 0)) | 
 | 	LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream); | 
 |       else | 
 | 	val_print_type_code_int (type, valaddr, stream); | 
 |       break; | 
 |  | 
 |     case TYPE_CODE_STRUCT: | 
 |       java_print_value_fields (type, valaddr, address, stream, format, | 
 | 			       recurse, pretty); | 
 |       break; | 
 |  | 
 |     default: | 
 |       return c_val_print (type, valaddr, embedded_offset, address, stream, | 
 | 			  format, deref_ref, recurse, pretty); | 
 |     } | 
 |  | 
 |   return 0; | 
 | } |