Re: [RFA]: Java Inferior Call Take 3

Jeff Johnston
2004-09-20T20:19:58Z

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Jim Blandy wrote:
> Jeff Johnston <jjohnstn@redhat.com> writes:
>
>>Ok now?
>>
>>Retested on x86-linux with up to date compiler with needed gcj
>>fixes.
>
>
> Yep, looks great. Thanks!
>
>

Thanks. With that, all parts have been approved and checked in. I have
included the final patches and ChangeLogs that were checked in.

-- Jeff J.

gdb/ChangeLog:

2004-09-20 Jeff Johnston <jjohnstn@redhat.com>

* dwarf2read.c (typename_concat): Change prototype to accept obstack
and dwarf2_cu struct pointer as arguments. Change function to use
obstack if provided and use dwarf2_cu to determine language-specific
separator.
(partial_die_parent_scope): Change comment to include java. Use
new version of typename_concat instead of obconcat.
(partial_die_full_name): Use typename_concat.
(read_namespace): Ditto.
(read_enumeration_type): Use typename_concat instead of obconcat.
(new_symbol): Ditto.
(add_partial_symbol): Enhance tests for C++ to also test for Java.
(guess_structure_name): Ditto.
(read_subroutine_type): Ditto.
(read_structure_type): Ditto.
(is_vtable_name): Add Java support.
(determine_class_name): Switch to new typename_concat call.
(determine_prefix): Switch to new typename_concat call.
* jv-exp.y (FuncStart): New pattern.
(MethodInvocation): Add support for simple function calls. Change
warning message for other forms of inferior call currently not
supported.
* valarith.c (value_subscript): Treat an array with upper-bound
of -1 as unknown size.

gdb/testsuite/ChangeLog:

2004-09-20 Jeff Johnston <jjohnstn@redhat.com>

* gdb.java/jprint.exp: New test case for java inferior call.
* gdb.java/jprint.java: Ditto.

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Index: dwarf2read.c
===================================================================
RCS file: /cvs/src/src/gdb/dwarf2read.c,v
retrieving revision 1.160
diff -u -p -r1.160 dwarf2read.c
--- dwarf2read.c 1 Sep 2004 04:19:21 -0000 1.160
+++ dwarf2read.c 20 Sep 2004 20:02:11 -0000
@@ -791,7 +791,8 @@ static void read_type_die (struct die_in

static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);

-static char *typename_concat (const char *prefix, const char *suffix);
+static char *typename_concat (struct obstack *, const char *prefix, const char *suffix,
+ struct dwarf2_cu *);

static void read_typedef (struct die_info *, struct dwarf2_cu *);

@@ -1511,7 +1512,8 @@ scan_partial_symbols (struct partial_die
/* Functions used to compute the fully scoped name of a partial DIE.

Normally, this is simple. For C++, the parent DIE's fully scoped
- name is concatenated with "::" and the partial DIE's name.
+ name is concatenated with "::" and the partial DIE's name. For
+ Java, the same thing occurs except that "." is used instead of "::".
Enumerators are an exception; they use the scope of their parent
enumeration type, i.e. the name of the enumeration type is not
prepended to the enumerator.
@@ -1566,8 +1568,8 @@ partial_die_parent_scope (struct partial
if (grandparent_scope == NULL)
parent->scope = parent->name;
else
- parent->scope = obconcat (&cu->comp_unit_obstack, grandparent_scope,
- "::", parent->name);
+ parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
+ parent->name, cu);
}
else if (parent->tag == DW_TAG_enumeration_type)
/* Enumerators should not get the name of the enumeration as a prefix. */
@@ -1599,7 +1601,7 @@ partial_die_full_name (struct partial_di
if (parent_scope == NULL)
return NULL;
else
- return concat (parent_scope, "::", pdi->name, NULL);
+ return typename_concat (NULL, parent_scope, pdi->name, cu);
}

static void
@@ -1717,14 +1719,16 @@ add_partial_symbol (struct partial_die_i
return;
add_psymbol_to_list (actual_name, strlen (actual_name),
STRUCT_DOMAIN, LOC_TYPEDEF,
- cu->language == language_cplus
+ (cu->language == language_cplus
+ || cu->language == language_java)
? &objfile->global_psymbols
: &objfile->static_psymbols,
0, (CORE_ADDR) 0, cu->language, objfile);

- if (cu->language == language_cplus)
+ if (cu->language == language_cplus
+ || cu->language == language_java)
{
- /* For C++, these implicitly act as typedefs as well. */
+ /* For C++ and Java, these implicitly act as typedefs as well. */
add_psymbol_to_list (actual_name, strlen (actual_name),
VAR_DOMAIN, LOC_TYPEDEF,
&objfile->global_psymbols,
@@ -1734,7 +1738,8 @@ add_partial_symbol (struct partial_die_i
case DW_TAG_enumerator:
add_psymbol_to_list (actual_name, strlen (actual_name),
VAR_DOMAIN, LOC_CONST,
- cu->language == language_cplus
+ (cu->language == language_cplus
+ || cu->language == language_java)
? &objfile->global_psymbols
: &objfile->static_psymbols,
0, (CORE_ADDR) 0, cu->language, objfile);
@@ -1814,7 +1819,8 @@ static void
guess_structure_name (struct partial_die_info *struct_pdi,
struct dwarf2_cu *cu)
{
- if (cu->language == language_cplus
+ if ((cu->language == language_cplus
+ || cu->language == language_java)
&& cu->has_namespace_info == 0
&& struct_pdi->has_children)
{
@@ -2474,7 +2480,8 @@ read_func_scope (struct die_info *die, s
if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
return;

- if (cu->language == language_cplus)
+ if (cu->language == language_cplus
+ || cu->language == language_java)
{
struct die_info *spec_die = die_specification (die, cu);

@@ -3272,10 +3279,13 @@ static int
is_vtable_name (const char *name, struct dwarf2_cu *cu)
{
static const char vptr[] = "_vptr";
+ static const char vtable[] = "vtable";

- /* C++ and some implementations of Java use this name. */
- if (strncmp (name, vptr, sizeof (vptr) - 1) == 0
- && is_cplus_marker (name[sizeof (vptr) - 1]))
+ /* Look for the C++ and Java forms of the vtable. */
+ if ((cu->language == language_java
+ && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
+ || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
+ && is_cplus_marker (name[sizeof (vptr) - 1])))
return 1;

return 0;
@@ -3316,7 +3326,8 @@ read_structure_type (struct die_info *di
attr = dwarf2_attr (die, DW_AT_name, cu);
if (attr && DW_STRING (attr))
{
- if (cu->language == language_cplus)
+ if (cu->language == language_cplus
+ || cu->language == language_java)
{
char *new_prefix = determine_class_name (die, cu);
TYPE_TAG_NAME (type) = obsavestring (new_prefix,
@@ -3518,11 +3529,9 @@ read_enumeration_type (struct die_info *

if (processing_has_namespace_info)
{
- TYPE_TAG_NAME (type) = obconcat (&objfile->objfile_obstack,
- processing_current_prefix,
- processing_current_prefix[0] == '\0'
- ? "" : "::",
- name);
+ TYPE_TAG_NAME (type) = typename_concat (&objfile->objfile_obstack,
+ processing_current_prefix,
+ name, cu);
}
else
{
@@ -3546,7 +3555,7 @@ read_enumeration_type (struct die_info *
}

/* Determine the name of the type represented by DIE, which should be
- a named C++ compound type. Return the name in question; the caller
+ a named C++ or Java compound type. Return the name in question; the caller
is responsible for xfree()'ing it. */

static char *
@@ -3593,8 +3602,9 @@ determine_class_name (struct die_info *d
if (new_prefix == NULL)
{
const char *name = dwarf2_name (die, cu);
- new_prefix = typename_concat (processing_current_prefix,
- name ? name : "<<anonymous>>");
+ new_prefix = typename_concat (NULL, processing_current_prefix,
+ name ? name : "<<anonymous>>",
+ cu);
}

if (back_to != NULL)
@@ -3861,6 +3871,7 @@ read_namespace (struct die_info *die, st
const char *name;
int is_anonymous;
struct die_info *current_die;
+ struct cleanup *back_to = make_cleanup (null_cleanup, 0);

name = namespace_name (die, &is_anonymous, cu);

@@ -3872,14 +3883,8 @@ read_namespace (struct die_info *die, st
}
else
{
- /* We need temp_name around because processing_current_prefix
- is a const char *. */
- char *temp_name = alloca (strlen (previous_prefix)
- + 2 + strlen(name) + 1);
- strcpy (temp_name, previous_prefix);
- strcat (temp_name, "::");
- strcat (temp_name, name);
-
+ char *temp_name = typename_concat (NULL, previous_prefix, name, cu);
+ make_cleanup (xfree, temp_name);
processing_current_prefix = temp_name;
}

@@ -3919,6 +3924,7 @@ read_namespace (struct die_info *die, st
}

processing_current_prefix = previous_prefix;
+ do_cleanups (back_to);
}

/* Return the name of the namespace represented by DIE. Set
@@ -4166,10 +4172,11 @@ read_subroutine_type (struct die_info *d
type = die_type (die, cu);
ftype = lookup_function_type (type);

- /* All functions in C++ have prototypes. */
+ /* All functions in C++ and Java have prototypes. */
attr = dwarf2_attr (die, DW_AT_prototyped, cu);
if ((attr && (DW_UNSND (attr) != 0))
- || cu->language == language_cplus)
+ || cu->language == language_cplus
+ || cu->language == language_java)
TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;

if (die->child != NULL)
@@ -4820,7 +4827,8 @@ load_partial_dies (bfd *abfd, char *info
else if (building_psymtab)
add_psymbol_to_list (part_die->name, strlen (part_die->name),
VAR_DOMAIN, LOC_CONST,
- cu->language == language_cplus
+ (cu->language == language_cplus
+ || cu->language == language_java)
? &cu->objfile->global_psymbols
: &cu->objfile->static_psymbols,
0, (CORE_ADDR) 0, cu->language, cu->objfile);
@@ -6431,7 +6439,8 @@ new_symbol (struct die_info *die, struct
read_structure_type, and the correct name is saved in
the type. */

- if (cu->language == language_cplus)
+ if (cu->language == language_cplus
+ || cu->language == language_java)
{
struct type *type = SYMBOL_TYPE (sym);

@@ -6448,7 +6457,7 @@ new_symbol (struct die_info *die, struct
}

{
- /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
+ /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
really ever be static objects: otherwise, if you try
to, say, break of a class's method and you're in a file
which doesn't mention that class, it won't work unless
@@ -6459,15 +6468,18 @@ new_symbol (struct die_info *die, struct
struct pending **list_to_add;

list_to_add = (cu->list_in_scope == &file_symbols
- && cu->language == language_cplus
+ && (cu->language == language_cplus
+ || cu->language == language_java)
? &global_symbols : cu->list_in_scope);

add_symbol_to_list (sym, list_to_add);

/* The semantics of C++ state that "struct foo { ... }" also
- defines a typedef for "foo". Synthesize a typedef symbol so
- that "ptype foo" works as expected. */
- if (cu->language == language_cplus)
+ defines a typedef for "foo". A Java class declaration also
+ defines a typedef for the class. Synthesize a typedef symbol
+ so that "ptype foo" works as expected. */
+ if (cu->language == language_cplus
+ || cu->language == language_java)
{
struct symbol *typedef_sym = (struct symbol *)
obstack_alloc (&objfile->objfile_obstack,
@@ -6487,10 +6499,9 @@ new_symbol (struct die_info *die, struct
if (processing_has_namespace_info
&& processing_current_prefix[0] != '\0')
{
- SYMBOL_LINKAGE_NAME (sym) = obconcat (&objfile->objfile_obstack,
- processing_current_prefix,
- "::",
- name);
+ SYMBOL_LINKAGE_NAME (sym) = typename_concat (&objfile->objfile_obstack,
+ processing_current_prefix,
+ name, cu);
}
SYMBOL_CLASS (sym) = LOC_TYPEDEF;
SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
@@ -6506,10 +6517,9 @@ new_symbol (struct die_info *die, struct
if (processing_has_namespace_info
&& processing_current_prefix[0] != '\0')
{
- SYMBOL_LINKAGE_NAME (sym) = obconcat (&objfile->objfile_obstack,
- processing_current_prefix,
- "::",
- name);
+ SYMBOL_LINKAGE_NAME (sym) = typename_concat (&objfile->objfile_obstack,
+ processing_current_prefix,
+ name, cu);
}
attr = dwarf2_attr (die, DW_AT_const_value, cu);
if (attr)
@@ -6523,7 +6533,8 @@ new_symbol (struct die_info *die, struct
struct pending **list_to_add;

list_to_add = (cu->list_in_scope == &file_symbols
- && cu->language == language_cplus
+ && (cu->language == language_cplus
+ || cu->language == language_java)
? &global_symbols : cu->list_in_scope);

add_symbol_to_list (sym, list_to_add);
@@ -6832,7 +6843,8 @@ determine_prefix (struct die_info *die,
{
struct die_info *parent;

- if (cu->language != language_cplus)
+ if (cu->language != language_cplus
+ && cu->language != language_java)
return NULL;

parent = die->parent;
@@ -6856,9 +6868,10 @@ determine_prefix (struct die_info *die,
{
int dummy;
char *parent_prefix = determine_prefix (parent, cu);
- char *retval = typename_concat (parent_prefix,
+ char *retval = typename_concat (NULL, parent_prefix,
namespace_name (parent, &dummy,
- cu));
+ cu),
+ cu);
xfree (parent_prefix);
return retval;
}
@@ -6891,25 +6904,47 @@ determine_prefix (struct die_info *die,
}
}

-/* Return a newly-allocated string formed by concatenating PREFIX,
- "::", and SUFFIX, except that if PREFIX is NULL or the empty
- string, just return a copy of SUFFIX. */
+/* Return a newly-allocated string formed by concatenating PREFIX and
+ SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
+ simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
+ perform an obconcat, otherwise allocate storage for the result. The CU argument
+ is used to determine the language and hence, the appropriate separator. */
+
+#define MAX_SEP_LEN 2 /* sizeof ("::") */

static char *
-typename_concat (const char *prefix, const char *suffix)
+typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
+ struct dwarf2_cu *cu)
{
- if (prefix == NULL || prefix[0] == '\0')
- return xstrdup (suffix);
- else
- {
- char *retval = xmalloc (strlen (prefix) + 2 + strlen (suffix) + 1);
+ char *sep;

- strcpy (retval, prefix);
- strcat (retval, "::");
- strcat (retval, suffix);
+ if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
+ sep = "";
+ else if (cu->language == language_java)
+ sep = ".";
+ else
+ sep = "::";

+ if (obs == NULL)
+ {
+ char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
+ retval[0] = '\0';
+
+ if (prefix)
+ {
+ strcpy (retval, prefix);
+ strcat (retval, sep);
+ }
+ if (suffix)
+ strcat (retval, suffix);
+
return retval;
}
+ else
+ {
+ /* We have an obstack. */
+ return obconcat (obs, prefix, sep, suffix);
+ }
}

static struct type *
Index: jv-exp.y
===================================================================
RCS file: /cvs/src/src/gdb/jv-exp.y,v
retrieving revision 1.18
diff -u -p -r1.18 jv-exp.y
--- jv-exp.y 23 Nov 2003 20:41:17 -0000 1.18
+++ jv-exp.y 20 Sep 2004 20:02:11 -0000
@@ -446,13 +446,22 @@ FieldAccess:
/*| SUPER '.' SimpleName { FIXME } */
;

+FuncStart:
+ Name '('
+ { push_expression_name ($1); }
+;
+
MethodInvocation:
- Name '(' ArgumentList_opt ')'
- { error (_("Method invocation not implemented")); }
+ FuncStart
+ { start_arglist(); }
+ ArgumentList_opt ')'
+ { write_exp_elt_opcode (OP_FUNCALL);
+ write_exp_elt_longcst ((LONGEST) end_arglist ());
+ write_exp_elt_opcode (OP_FUNCALL); }
| Primary '.' SimpleName '(' ArgumentList_opt ')'
- { error (_("Method invocation not implemented")); }
+ { error (_("Form of method invocation not implemented")); }
| SUPER '.' SimpleName '(' ArgumentList_opt ')'
- { error (_("Method invocation not implemented")); }
+ { error (_("Form of method invocation not implemented")); }
;

ArrayAccess:
Index: symtab.c
===================================================================
RCS file: /cvs/src/src/gdb/symtab.c,v
retrieving revision 1.138
diff -u -p -r1.138 symtab.c
--- symtab.c 20 Sep 2004 18:31:02 -0000 1.138
+++ symtab.c 20 Sep 2004 20:02:11 -0000
@@ -998,7 +998,7 @@ lookup_symbol (const char *name, const s

modified_name = name;

- /* If we are using C++ language, demangle the name before doing a lookup, so
+ /* If we are using C++ or Java, demangle the name before doing a lookup, so
we can always binary search. */
if (current_language->la_language == language_cplus)
{
@@ -1010,6 +1010,17 @@ lookup_symbol (const char *name, const s
needtofreename = 1;
}
}
+ else if (current_language->la_language == language_java)
+ {
+ demangled_name = cplus_demangle (name,
+ DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);
+ if (demangled_name)
+ {
+ mangled_name = name;
+ modified_name = demangled_name;
+ needtofreename = 1;
+ }
+ }

if (case_sensitivity == case_sensitive_off)
{
Index: valarith.c
===================================================================
RCS file: /cvs/src/src/gdb/valarith.c,v
retrieving revision 1.23
diff -u -p -r1.23 valarith.c
--- valarith.c 27 Jun 2004 07:57:15 -0000 1.23
+++ valarith.c 20 Sep 2004 20:02:11 -0000
@@ -202,7 +202,10 @@ value_subscript (struct value *array, st
LONGEST index = value_as_long (idx);
if (index >= lowerbound && index <= upperbound)
return value_subscripted_rvalue (array, idx, lowerbound);
- warning ("array or string index out of range");
+ /* Emit warning unless we have an array of unknown size.
+ An array of unknown size has lowerbound 0 and upperbound -1. */
+ if (upperbound > -1)
+ warning ("array or string index out of range");
/* fall doing C stuff */
c_style = 1;
}

[-- Attachment #3: java-call-test-final.patch --]
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Index: gdb.java/jprint.exp
===================================================================
RCS file: gdb.java/jprint.exp
diff -N gdb.java/jprint.exp
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ gdb.java/jprint.exp 20 Sep 2004 20:03:02 -0000
@@ -0,0 +1,80 @@
+# Copyright 2004 Free Software Foundation, Inc.
+
+# 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.
+
+# This file was written by Jeff Johnston. (jjohnstn@redhat.com)
+#
+
+if $tracelevel then {
+ strace $tracelevel
+}
+
+load_lib "java.exp"
+
+set testfile "jprint"
+set srcfile ${srcdir}/$subdir/${testfile}.java
+set binfile ${objdir}/${subdir}/${testfile}
+if { [compile_java_from_source ${srcfile} ${binfile} "-g"] != "" } {
+ untested "Couldn't compile ${srcfile}"
+ return -1
+}
+
+# Set the current language to java. This counts as a test. If it
+# fails, then we skip the other tests.
+
+proc set_lang_java {} {
+ global gdb_prompt
+ global binfile objdir subdir
+
+ verbose "loading file '$binfile'"
+ gdb_load $binfile
+
+ send_gdb "set language java\n"
+ gdb_expect {
+ -re ".*$gdb_prompt $" {}
+ timeout { fail "set language java (timeout)" ; return 0 }
+ }
+
+ return [gdb_test "show language" ".* source language is \"java\".*" \
+ "set language to \"java\""]
+}
+
+set prms_id 0
+set bug_id 0
+
+# Start with a fresh gdb.
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+
+gdb_test "set print sevenbit-strings" ".*"
+
+if ![set_lang_java] then {
+ # Ref PR gdb:java/1565. Don't use the simpler "break jmisc.main".
+ # As of 2004-02-24 it wasn't working and is being tested separatly.
+ runto "\'${testfile}.main(java.lang.String\[\])\'"
+
+ gdb_test "p jvclass.addprint(4,5,6)" "sum is 15\r\n.*" "unambiguous static call"
+
+ gdb_test "next" ""
+ gdb_test "next" ""
+
+ gdb_test "p x.print(44)" "x is 44\r\n.*" "single argument print call"
+ gdb_test "p x.print(22,33)" "y is 33\r\n.*" "double argument print call"
+ gdb_test "call x.dothat(55)" "new value is 58\r\n.*= 62.*" "virtual fn call"
+ gdb_test "p x.addprint(1,2,3)" "sum is 6\r\n.*" "inherited static call"
+ gdb_test "call x.addk(44)" "adding k gives 121\r\n.*= 121.*" "inherited virtual fn call"
+}
Index: gdb.java/jprint.java
===================================================================
RCS file: gdb.java/jprint.java
diff -N gdb.java/jprint.java
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ gdb.java/jprint.java 20 Sep 2004 20:03:02 -0000
@@ -0,0 +1,62 @@
+// jprint.java test program.
+//
+// Copyright 2004
+// Free Software Foundation, Inc.
+//
+// Written by Jeff Johnston <jjohnstn@redhat.com>
+// Contributed by Red Hat
+//
+// 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.
+
+class jvclass {
+ public static int k;
+ static {
+ k = 77;
+ }
+ public static void addprint (int x, int y, int z) {
+ int sum = x + y + z;
+ System.out.println ("sum is " + sum);
+ }
+
+ public int addk (int x) {
+ int sum = x + k;
+ System.out.println ("adding k gives " + sum);
+ return sum;
+ }
+}
+
+public class jprint extends jvclass {
+ public int dothat (int x) {
+ int y = x + 3;
+ System.out.println ("new value is " + y);
+ return y + 4;
+ }
+ public static void print (int x) {
+ System.out.println("x is " + x);
+ }
+ public static void print (int x, int y) {
+ System.out.println("y is " + y);
+ }
+ public static void main(String[] args) {
+ jprint x = new jprint ();
+ x.print (44);
+ print (k, 33);
+ }
+}
+
+