gdb/jv-typeprint.c - binutils-gdb - Git at Google

 /* Support for printing Java types for GDB, the GNU debugger.
    Copyright (C) 1997, 1998, 1999, 2000, 2007, 2008
    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 3 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, see <http://www.gnu.org/licenses/>.  */


 #include "defs.h"
 #include "symtab.h"
 #include "gdbtypes.h"
 #include "value.h"
 #include "demangle.h"
 #include "jv-lang.h"
 #include "gdb_string.h"
 #include "typeprint.h"
 #include "c-lang.h"
 #include "cp-abi.h"

 /* Local functions */

 static void java_type_print_base (struct type * type,
 				  struct ui_file *stream, int show,
 				  int level);

 static void
 java_type_print_derivation_info (struct ui_file *stream, struct type *type)
 {
   char *name;
   int i;
   int n_bases;
   int prev;

   n_bases = TYPE_N_BASECLASSES (type);

   for (i = 0, prev = 0; i < n_bases; i++)
     {
       int kind;

       kind = BASETYPE_VIA_VIRTUAL (type, i) ? 'I' : 'E';

       fputs_filtered (kind == prev ? ", "
 		      : kind == 'I' ? " implements "
 		      : " extends ",
 		      stream);
       prev = kind;
       name = type_name_no_tag (TYPE_BASECLASS (type, i));

       fprintf_filtered (stream, "%s", name ? name : "(null)");
     }

   if (i > 0)
     fputs_filtered (" ", stream);
 }

 /* Print the name of the type (or the ultimate pointer target,
    function value or array element), or the description of a
    structure or union.

    SHOW positive means print details about the type (e.g. enum values),
    and print structure elements passing SHOW - 1 for show.
    SHOW negative means just print the type name or struct tag if there is one.
    If there is no name, print something sensible but concise like
    "struct {...}".
    SHOW zero means just print the type name or struct tag if there is one.
    If there is no name, print something sensible but not as concise like
    "struct {int x; int y;}".

    LEVEL is the number of spaces to indent by.
    We increase it for some recursive calls.  */

 static void
 java_type_print_base (struct type *type, struct ui_file *stream, int show,
 		      int level)
 {
   int i;
   int len;
   char *mangled_name;
   char *demangled_name;
   QUIT;

   wrap_here ("    ");

   if (type == NULL)
     {
       fputs_filtered ("<type unknown>", stream);
       return;
     }

   /* When SHOW is zero or less, and there is a valid type name, then always
      just print the type name directly from the type.  */

   if (show <= 0
       && TYPE_NAME (type) != NULL)
     {
       fputs_filtered (TYPE_NAME (type), stream);
       return;
     }

   CHECK_TYPEDEF (type);

   switch (TYPE_CODE (type))
     {
     case TYPE_CODE_PTR:
       java_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);
       break;

     case TYPE_CODE_STRUCT:
       if (TYPE_TAG_NAME (type) != NULL && TYPE_TAG_NAME (type)[0] == '[')
 	{			/* array type */
 	  char *name = java_demangle_type_signature (TYPE_TAG_NAME (type));
 	  fputs_filtered (name, stream);
 	  xfree (name);
 	  break;
 	}

       if (show >= 0)
 	fprintf_filtered (stream, "class ");

       if (TYPE_TAG_NAME (type) != NULL)
 	{
 	  fputs_filtered (TYPE_TAG_NAME (type), stream);
 	  if (show > 0)
 	    fputs_filtered (" ", stream);
 	}

       wrap_here ("    ");

       if (show < 0)
 	{
 	  /* If we just printed a tag name, no need to print anything else.  */
 	  if (TYPE_TAG_NAME (type) == NULL)
 	    fprintf_filtered (stream, "{...}");
 	}
       else if (show > 0 || TYPE_TAG_NAME (type) == NULL)
 	{
 	  java_type_print_derivation_info (stream, type);

 	  fprintf_filtered (stream, "{\n");
 	  if ((TYPE_NFIELDS (type) == 0) && (TYPE_NFN_FIELDS (type) == 0))
 	    {
 	      if (TYPE_STUB (type))
 		fprintfi_filtered (level + 4, stream, "<incomplete type>\n");
 	      else
 		fprintfi_filtered (level + 4, stream, "<no data fields>\n");
 	    }

 	  /* If there is a base class for this type,
 	     do not print the field that it occupies.  */

 	  len = TYPE_NFIELDS (type);
 	  for (i = TYPE_N_BASECLASSES (type); i < len; i++)
 	    {
 	      QUIT;
 	      /* Don't print out virtual function table.  */
 	      if (strncmp (TYPE_FIELD_NAME (type, i), "_vptr", 5) == 0
 		  && is_cplus_marker ((TYPE_FIELD_NAME (type, i))[5]))
 		continue;

 	      /* Don't print the dummy field "class". */
 	      if (strncmp (TYPE_FIELD_NAME (type, i), "class", 5) == 0)
 		continue;

 	      print_spaces_filtered (level + 4, stream);

 	      if (HAVE_CPLUS_STRUCT (type))
 		{
 		  if (TYPE_FIELD_PROTECTED (type, i))
 		    fprintf_filtered (stream, "protected ");
 		  else if (TYPE_FIELD_PRIVATE (type, i))
 		    fprintf_filtered (stream, "private ");
 		  else
 		    fprintf_filtered (stream, "public ");
 		}

 	      if (field_is_static (&TYPE_FIELD (type, i)))
 		fprintf_filtered (stream, "static ");

 	      java_print_type (TYPE_FIELD_TYPE (type, i),
 			       TYPE_FIELD_NAME (type, i),
 			       stream, show - 1, level + 4);

 	      fprintf_filtered (stream, ";\n");
 	    }

 	  /* If there are both fields and methods, put a space between. */
 	  len = TYPE_NFN_FIELDS (type);
 	  if (len)
 	    fprintf_filtered (stream, "\n");

 	  /* Print out the methods */

 	  for (i = 0; i < len; i++)
 	    {
 	      struct fn_field *f;
 	      int j;
 	      char *method_name;
 	      char *name;
 	      int is_constructor;
 	      int n_overloads;

 	      f = TYPE_FN_FIELDLIST1 (type, i);
 	      n_overloads = TYPE_FN_FIELDLIST_LENGTH (type, i);
 	      method_name = TYPE_FN_FIELDLIST_NAME (type, i);
 	      name = type_name_no_tag (type);
 	      is_constructor = name && strcmp (method_name, name) == 0;

 	      for (j = 0; j < n_overloads; j++)
 		{
 		  char *physname;
 		  int is_full_physname_constructor;

 		  physname = TYPE_FN_FIELD_PHYSNAME (f, j);

 		  is_full_physname_constructor
                     = (is_constructor_name (physname)
                        || is_destructor_name (physname));

 		  QUIT;

 		  print_spaces_filtered (level + 4, stream);

 		  if (TYPE_FN_FIELD_PROTECTED (f, j))
 		    fprintf_filtered (stream, "protected ");
 		  else if (TYPE_FN_FIELD_PRIVATE (f, j))
 		    fprintf_filtered (stream, "private ");
 		  else if (TYPE_FN_FIELD_PUBLIC (f, j))
 		    fprintf_filtered (stream, "public ");

 		  if (TYPE_FN_FIELD_ABSTRACT (f, j))
 		    fprintf_filtered (stream, "abstract ");
 		  if (TYPE_FN_FIELD_STATIC (f, j))
 		    fprintf_filtered (stream, "static ");
 		  if (TYPE_FN_FIELD_FINAL (f, j))
 		    fprintf_filtered (stream, "final ");
 		  if (TYPE_FN_FIELD_SYNCHRONIZED (f, j))
 		    fprintf_filtered (stream, "synchronized ");
 		  if (TYPE_FN_FIELD_NATIVE (f, j))
 		    fprintf_filtered (stream, "native ");

 		  if (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f, j)) == 0)
 		    {
 		      /* Keep GDB from crashing here.  */
 		      fprintf_filtered (stream, "<undefined type> %s;\n",
 					TYPE_FN_FIELD_PHYSNAME (f, j));
 		      break;
 		    }
 		  else if (!is_constructor && !is_full_physname_constructor)
 		    {
 		      type_print (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f, j)),
 				  "", stream, -1);
 		      fputs_filtered (" ", stream);
 		    }

 		  if (TYPE_FN_FIELD_STUB (f, j))
 		    /* Build something we can demangle.  */
 		    mangled_name = gdb_mangle_name (type, i, j);
 		  else
 		    mangled_name = TYPE_FN_FIELD_PHYSNAME (f, j);

 		  demangled_name =
 		    cplus_demangle (mangled_name,
 				    DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);

 		  if (demangled_name == NULL)
 		    demangled_name = xstrdup (mangled_name);

 		  {
 		    char *demangled_no_class;
 		    char *ptr;

 		    ptr = demangled_no_class = demangled_name;

 		    while (1)
 		      {
 			char c;

 			c = *ptr++;

 			if (c == 0 || c == '(')
 			  break;
 			if (c == '.')
 			  demangled_no_class = ptr;
 		      }

 		    fputs_filtered (demangled_no_class, stream);
 		    xfree (demangled_name);
 		  }

 		  if (TYPE_FN_FIELD_STUB (f, j))
 		    xfree (mangled_name);

 		  fprintf_filtered (stream, ";\n");
 		}
 	    }

 	  fprintfi_filtered (level, stream, "}");
 	}
       break;

     default:
       c_type_print_base (type, stream, show, level);
     }
 }

 /* LEVEL is the depth to indent lines by.  */

 extern void c_type_print_varspec_suffix (struct type *, struct ui_file *,
 					 int, int, int);

 void
 java_print_type (struct type *type, char *varstring, struct ui_file *stream,
 		 int show, int level)
 {
   int demangled_args;

   java_type_print_base (type, stream, show, level);

   if (varstring != NULL && *varstring != '\0')
     {
       fputs_filtered (" ", stream);
       fputs_filtered (varstring, stream);
     }

   /* For demangled function names, we have the arglist as part of the name,
      so don't print an additional pair of ()'s */

   demangled_args = varstring != NULL && strchr (varstring, '(') != NULL;
   c_type_print_varspec_suffix (type, stream, show, 0, demangled_args);
 }
	/* Support for printing Java types for GDB, the GNU debugger.
	Copyright (C) 1997, 1998, 1999, 2000, 2007, 2008
	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 3 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, see <http://www.gnu.org/licenses/>. */


	#include "defs.h"
	#include "symtab.h"
	#include "gdbtypes.h"
	#include "value.h"
	#include "demangle.h"
	#include "jv-lang.h"
	#include "gdb_string.h"
	#include "typeprint.h"
	#include "c-lang.h"
	#include "cp-abi.h"

	/* Local functions */

	static void java_type_print_base (struct type * type,
	struct ui_file *stream, int show,
	int level);

	static void
	java_type_print_derivation_info (struct ui_file stream, struct type type)
	{
	char *name;
	int i;
	int n_bases;
	int prev;

	n_bases = TYPE_N_BASECLASSES (type);

	for (i = 0, prev = 0; i < n_bases; i++)
	{
	int kind;

	kind = BASETYPE_VIA_VIRTUAL (type, i) ? 'I' : 'E';

	fputs_filtered (kind == prev ? ", "
	: kind == 'I' ? " implements "
	: " extends ",
	stream);
	prev = kind;
	name = type_name_no_tag (TYPE_BASECLASS (type, i));

	fprintf_filtered (stream, "%s", name ? name : "(null)");
	}

	if (i > 0)
	fputs_filtered (" ", stream);
	}

	/* Print the name of the type (or the ultimate pointer target,
	function value or array element), or the description of a
	structure or union.

	SHOW positive means print details about the type (e.g. enum values),
	and print structure elements passing SHOW - 1 for show.
	SHOW negative means just print the type name or struct tag if there is one.
	If there is no name, print something sensible but concise like
	"struct {...}".
	SHOW zero means just print the type name or struct tag if there is one.
	If there is no name, print something sensible but not as concise like
	"struct {int x; int y;}".

	LEVEL is the number of spaces to indent by.
	We increase it for some recursive calls. */

	static void
	java_type_print_base (struct type type, struct ui_file stream, int show,
	int level)
	{
	int i;
	int len;
	char *mangled_name;
	char *demangled_name;
	QUIT;

	wrap_here (" ");

	if (type == NULL)
	{
	fputs_filtered ("<type unknown>", stream);
	return;
	}

	/* When SHOW is zero or less, and there is a valid type name, then always
	just print the type name directly from the type. */

	if (show <= 0
	&& TYPE_NAME (type) != NULL)
	{
	fputs_filtered (TYPE_NAME (type), stream);
	return;
	}

	CHECK_TYPEDEF (type);

	switch (TYPE_CODE (type))
	{
	case TYPE_CODE_PTR:
	java_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);
	break;

	case TYPE_CODE_STRUCT:
	if (TYPE_TAG_NAME (type) != NULL && TYPE_TAG_NAME (type)[0] == '[')
	{ /* array type */
	char *name = java_demangle_type_signature (TYPE_TAG_NAME (type));
	fputs_filtered (name, stream);
	xfree (name);
	break;
	}

	if (show >= 0)
	fprintf_filtered (stream, "class ");

	if (TYPE_TAG_NAME (type) != NULL)
	{
	fputs_filtered (TYPE_TAG_NAME (type), stream);
	if (show > 0)
	fputs_filtered (" ", stream);
	}

	wrap_here (" ");

	if (show < 0)
	{
	/* If we just printed a tag name, no need to print anything else. */
	if (TYPE_TAG_NAME (type) == NULL)
	fprintf_filtered (stream, "{...}");
	}
	else if (show > 0 \|\| TYPE_TAG_NAME (type) == NULL)
	{
	java_type_print_derivation_info (stream, type);

	fprintf_filtered (stream, "{\n");
	if ((TYPE_NFIELDS (type) == 0) && (TYPE_NFN_FIELDS (type) == 0))
	{
	if (TYPE_STUB (type))
	fprintfi_filtered (level + 4, stream, "<incomplete type>\n");
	else
	fprintfi_filtered (level + 4, stream, "<no data fields>\n");
	}

	/* If there is a base class for this type,
	do not print the field that it occupies. */

	len = TYPE_NFIELDS (type);
	for (i = TYPE_N_BASECLASSES (type); i < len; i++)
	{
	QUIT;
	/* Don't print out virtual function table. */
	if (strncmp (TYPE_FIELD_NAME (type, i), "_vptr", 5) == 0
	&& is_cplus_marker ((TYPE_FIELD_NAME (type, i))[5]))
	continue;

	/* Don't print the dummy field "class". */
	if (strncmp (TYPE_FIELD_NAME (type, i), "class", 5) == 0)
	continue;

	print_spaces_filtered (level + 4, stream);

	if (HAVE_CPLUS_STRUCT (type))
	{
	if (TYPE_FIELD_PROTECTED (type, i))
	fprintf_filtered (stream, "protected ");
	else if (TYPE_FIELD_PRIVATE (type, i))
	fprintf_filtered (stream, "private ");
	else
	fprintf_filtered (stream, "public ");
	}

	if (field_is_static (&TYPE_FIELD (type, i)))
	fprintf_filtered (stream, "static ");

	java_print_type (TYPE_FIELD_TYPE (type, i),
	TYPE_FIELD_NAME (type, i),
	stream, show - 1, level + 4);

	fprintf_filtered (stream, ";\n");
	}

	/* If there are both fields and methods, put a space between. */
	len = TYPE_NFN_FIELDS (type);
	if (len)
	fprintf_filtered (stream, "\n");

	/* Print out the methods */

	for (i = 0; i < len; i++)
	{
	struct fn_field *f;
	int j;
	char *method_name;
	char *name;
	int is_constructor;
	int n_overloads;

	f = TYPE_FN_FIELDLIST1 (type, i);
	n_overloads = TYPE_FN_FIELDLIST_LENGTH (type, i);
	method_name = TYPE_FN_FIELDLIST_NAME (type, i);
	name = type_name_no_tag (type);
	is_constructor = name && strcmp (method_name, name) == 0;

	for (j = 0; j < n_overloads; j++)
	{
	char *physname;
	int is_full_physname_constructor;

	physname = TYPE_FN_FIELD_PHYSNAME (f, j);

	is_full_physname_constructor
	= (is_constructor_name (physname)
	\|\| is_destructor_name (physname));

	QUIT;

	print_spaces_filtered (level + 4, stream);

	if (TYPE_FN_FIELD_PROTECTED (f, j))
	fprintf_filtered (stream, "protected ");
	else if (TYPE_FN_FIELD_PRIVATE (f, j))
	fprintf_filtered (stream, "private ");
	else if (TYPE_FN_FIELD_PUBLIC (f, j))
	fprintf_filtered (stream, "public ");

	if (TYPE_FN_FIELD_ABSTRACT (f, j))
	fprintf_filtered (stream, "abstract ");
	if (TYPE_FN_FIELD_STATIC (f, j))
	fprintf_filtered (stream, "static ");
	if (TYPE_FN_FIELD_FINAL (f, j))
	fprintf_filtered (stream, "final ");
	if (TYPE_FN_FIELD_SYNCHRONIZED (f, j))
	fprintf_filtered (stream, "synchronized ");
	if (TYPE_FN_FIELD_NATIVE (f, j))
	fprintf_filtered (stream, "native ");

	if (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f, j)) == 0)
	{
	/* Keep GDB from crashing here. */
	fprintf_filtered (stream, "<undefined type> %s;\n",
	TYPE_FN_FIELD_PHYSNAME (f, j));
	break;
	}
	else if (!is_constructor && !is_full_physname_constructor)
	{
	type_print (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f, j)),
	"", stream, -1);
	fputs_filtered (" ", stream);
	}

	if (TYPE_FN_FIELD_STUB (f, j))
	/* Build something we can demangle. */
	mangled_name = gdb_mangle_name (type, i, j);
	else
	mangled_name = TYPE_FN_FIELD_PHYSNAME (f, j);

	demangled_name =
	cplus_demangle (mangled_name,
	DMGL_ANSI \| DMGL_PARAMS \| DMGL_JAVA);

	if (demangled_name == NULL)
	demangled_name = xstrdup (mangled_name);

	{
	char *demangled_no_class;
	char *ptr;

	ptr = demangled_no_class = demangled_name;

	while (1)
	{
	char c;

	c = *ptr++;

	if (c == 0 \|\| c == '(')
	break;
	if (c == '.')
	demangled_no_class = ptr;
	}

	fputs_filtered (demangled_no_class, stream);
	xfree (demangled_name);
	}

	if (TYPE_FN_FIELD_STUB (f, j))
	xfree (mangled_name);

	fprintf_filtered (stream, ";\n");
	}
	}

	fprintfi_filtered (level, stream, "}");
	}
	break;

	default:
	c_type_print_base (type, stream, show, level);
	}
	}

	/* LEVEL is the depth to indent lines by. */

	extern void c_type_print_varspec_suffix (struct type , struct ui_file ,
	int, int, int);

	void
	java_print_type (struct type type, char varstring, struct ui_file *stream,
	int show, int level)
	{
	int demangled_args;

	java_type_print_base (type, stream, show, level);

	if (varstring != NULL && *varstring != '\0')
	{
	fputs_filtered (" ", stream);
	fputs_filtered (varstring, stream);
	}

	/* For demangled function names, we have the arglist as part of the name,
	so don't print an additional pair of ()'s */

	demangled_args = varstring != NULL && strchr (varstring, '(') != NULL;
	c_type_print_varspec_suffix (type, stream, show, 0, demangled_args);
	}