1 // resolve.cc - Code for linking and resolving classes and pool entries.
3 /* Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation
5 This file is part of libgcj.
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
11 /* Author: Kresten Krab Thorup <krab@gnu.org> */
16 #include <java-interp.h>
21 #include <java-cpool.h>
22 #include <java/lang/Class.h>
23 #include <java/lang/String.h>
24 #include <java/lang/StringBuffer.h>
25 #include <java/lang/Thread.h>
26 #include <java/lang/InternalError.h>
27 #include <java/lang/VirtualMachineError.h>
28 #include <java/lang/NoSuchFieldError.h>
29 #include <java/lang/NoSuchMethodError.h>
30 #include <java/lang/ClassFormatError.h>
31 #include <java/lang/IllegalAccessError.h>
32 #include <java/lang/AbstractMethodError.h>
33 #include <java/lang/NoClassDefFoundError.h>
34 #include <java/lang/IncompatibleClassChangeError.h>
35 #include <java/lang/reflect/Modifier.h>
40 _Jv_ResolveField (_Jv_Field
*field
, java::lang::ClassLoader
*loader
)
42 if (! field
->isResolved ())
44 _Jv_Utf8Const
*sig
= (_Jv_Utf8Const
*)field
->type
;
45 field
->type
= _Jv_FindClassFromSignature (sig
->data
, loader
);
46 field
->flags
&= ~_Jv_FIELD_UNRESOLVED_FLAG
;
52 static void throw_internal_error (char *msg
)
53 __attribute__ ((__noreturn__
));
54 static void throw_class_format_error (jstring msg
)
55 __attribute__ ((__noreturn__
));
56 static void throw_class_format_error (char *msg
)
57 __attribute__ ((__noreturn__
));
59 static int get_alignment_from_class (jclass
);
61 static _Jv_ResolvedMethod
*
62 _Jv_BuildResolvedMethod (_Jv_Method
*,
68 static void throw_incompatible_class_change_error (jstring msg
)
70 throw new java::lang::IncompatibleClassChangeError (msg
);
74 _Jv_ResolvePoolEntry (jclass klass
, int index
)
76 using namespace java::lang::reflect
;
78 _Jv_Constants
*pool
= &klass
->constants
;
80 if ((pool
->tags
[index
] & JV_CONSTANT_ResolvedFlag
) != 0)
81 return pool
->data
[index
];
83 switch (pool
->tags
[index
]) {
84 case JV_CONSTANT_Class
:
86 _Jv_Utf8Const
*name
= pool
->data
[index
].utf8
;
89 if (name
->data
[0] == '[')
90 found
= _Jv_FindClassFromSignature (&name
->data
[0],
93 found
= _Jv_FindClass (name
, klass
->loader
);
97 jstring str
= _Jv_NewStringUTF (name
->data
);
98 // This exception is specified in JLS 2nd Ed, section 5.1.
99 throw new java::lang::NoClassDefFoundError (str
);
102 if ((found
->accflags
& Modifier::PUBLIC
) == Modifier::PUBLIC
103 || (_Jv_ClassNameSamePackage (found
->name
,
106 pool
->data
[index
].clazz
= found
;
107 pool
->tags
[index
] |= JV_CONSTANT_ResolvedFlag
;
111 throw new java::lang::IllegalAccessError (found
->getName());
116 case JV_CONSTANT_String
:
119 str
= _Jv_NewStringUtf8Const (pool
->data
[index
].utf8
);
120 pool
->data
[index
].o
= str
;
121 pool
->tags
[index
] |= JV_CONSTANT_ResolvedFlag
;
126 case JV_CONSTANT_Fieldref
:
128 _Jv_ushort class_index
, name_and_type_index
;
129 _Jv_loadIndexes (&pool
->data
[index
],
131 name_and_type_index
);
132 jclass owner
= (_Jv_ResolvePoolEntry (klass
, class_index
)).clazz
;
135 _Jv_InitClass (owner
);
137 _Jv_ushort name_index
, type_index
;
138 _Jv_loadIndexes (&pool
->data
[name_and_type_index
],
142 _Jv_Utf8Const
*field_name
= pool
->data
[name_index
].utf8
;
143 _Jv_Utf8Const
*field_type_name
= pool
->data
[type_index
].utf8
;
145 // FIXME: The implementation of this function
146 // (_Jv_FindClassFromSignature) will generate an instance of
147 // _Jv_Utf8Const for each call if the field type is a class name
148 // (Lxx.yy.Z;). This may be too expensive to do for each and
149 // every fieldref being resolved. For now, we fix the problem by
150 // only doing it when we have a loader different from the class
151 // declaring the field.
153 jclass field_type
= 0;
155 if (owner
->loader
!= klass
->loader
)
156 field_type
= _Jv_FindClassFromSignature (field_type_name
->data
,
159 _Jv_Field
* the_field
= 0;
161 for (jclass cls
= owner
; cls
!= 0; cls
= cls
->getSuperclass ())
163 for (int i
= 0; i
< cls
->field_count
; i
++)
165 _Jv_Field
*field
= &cls
->fields
[i
];
166 if (! _Jv_equalUtf8Consts (field
->name
, field_name
))
169 // now, check field access.
172 || ((field
->flags
& Modifier::PUBLIC
) != 0)
173 || (((field
->flags
& Modifier::PROTECTED
) != 0)
174 && cls
->isAssignableFrom (klass
))
175 || (((field
->flags
& Modifier::PRIVATE
) == 0)
176 && _Jv_ClassNameSamePackage (cls
->name
,
179 /* resove the field using the class' own loader
182 if (!field
->isResolved ())
183 _Jv_ResolveField (field
, cls
->loader
);
185 if (field_type
!= 0 && field
->type
!= field_type
)
186 throw new java::lang::LinkageError
188 ("field type mismatch with different loaders"));
191 goto end_of_field_search
;
195 throw new java::lang::IllegalAccessError
;
203 java::lang::StringBuffer
*sb
= new java::lang::StringBuffer();
204 sb
->append(JvNewStringLatin1("field "));
205 sb
->append(owner
->getName());
206 sb
->append(JvNewStringLatin1("."));
207 sb
->append(_Jv_NewStringUTF(field_name
->data
));
208 sb
->append(JvNewStringLatin1(" was not found."));
209 throw_incompatible_class_change_error(sb
->toString());
212 pool
->data
[index
].field
= the_field
;
213 pool
->tags
[index
] |= JV_CONSTANT_ResolvedFlag
;
217 case JV_CONSTANT_Methodref
:
218 case JV_CONSTANT_InterfaceMethodref
:
220 _Jv_ushort class_index
, name_and_type_index
;
221 _Jv_loadIndexes (&pool
->data
[index
],
223 name_and_type_index
);
224 jclass owner
= (_Jv_ResolvePoolEntry (klass
, class_index
)).clazz
;
227 _Jv_InitClass (owner
);
229 _Jv_ushort name_index
, type_index
;
230 _Jv_loadIndexes (&pool
->data
[name_and_type_index
],
234 _Jv_Utf8Const
*method_name
= pool
->data
[name_index
].utf8
;
235 _Jv_Utf8Const
*method_signature
= pool
->data
[type_index
].utf8
;
237 _Jv_Method
*the_method
= 0;
238 jclass found_class
= 0;
240 // First search the class itself.
241 the_method
= _Jv_SearchMethodInClass (owner
, klass
,
242 method_name
, method_signature
);
247 goto end_of_method_search
;
250 // If we are resolving an interface method, search the
251 // interface's superinterfaces (A superinterface is not an
252 // interface's superclass - a superinterface is implemented by
254 if (pool
->tags
[index
] == JV_CONSTANT_InterfaceMethodref
)
259 ifaces
.list
= (jclass
*) _Jv_Malloc (ifaces
.len
* sizeof (jclass
*));
261 _Jv_GetInterfaces (owner
, &ifaces
);
263 for (int i
= 0; i
< ifaces
.count
; i
++)
265 jclass cls
= ifaces
.list
[i
];
266 the_method
= _Jv_SearchMethodInClass (cls
, klass
, method_name
,
275 _Jv_Free (ifaces
.list
);
278 goto end_of_method_search
;
281 // Finally, search superclasses.
282 for (jclass cls
= owner
->getSuperclass (); cls
!= 0;
283 cls
= cls
->getSuperclass ())
285 the_method
= _Jv_SearchMethodInClass (cls
, klass
,
286 method_name
, method_signature
);
294 end_of_method_search
:
296 // FIXME: if (cls->loader != klass->loader), then we
297 // must actually check that the types of arguments
298 // correspond. That is, for each argument type, and
299 // the return type, doing _Jv_FindClassFromSignature
300 // with either loader should produce the same result,
301 // i.e., exactly the same jclass object. JVMS 5.4.3.3
305 java::lang::StringBuffer
*sb
= new java::lang::StringBuffer();
306 sb
->append(JvNewStringLatin1("method "));
307 sb
->append(owner
->getName());
308 sb
->append(JvNewStringLatin1("."));
309 sb
->append(_Jv_NewStringUTF(method_name
->data
));
310 sb
->append(JvNewStringLatin1(" was not found."));
311 throw new java::lang::NoSuchMethodError (sb
->toString());
314 int vtable_index
= -1;
315 if (pool
->tags
[index
] != JV_CONSTANT_InterfaceMethodref
)
316 vtable_index
= (jshort
)the_method
->index
;
318 pool
->data
[index
].rmethod
=
319 _Jv_BuildResolvedMethod(the_method
,
321 (the_method
->accflags
& Modifier::STATIC
) != 0,
323 pool
->tags
[index
] |= JV_CONSTANT_ResolvedFlag
;
329 return pool
->data
[index
];
332 // Find a method declared in the cls that is referenced from klass and
333 // perform access checks.
335 _Jv_SearchMethodInClass (jclass cls
, jclass klass
,
336 _Jv_Utf8Const
*method_name
,
337 _Jv_Utf8Const
*method_signature
)
339 using namespace java::lang::reflect
;
341 for (int i
= 0; i
< cls
->method_count
; i
++)
343 _Jv_Method
*method
= &cls
->methods
[i
];
344 if ( (!_Jv_equalUtf8Consts (method
->name
,
346 || (!_Jv_equalUtf8Consts (method
->signature
,
351 || ((method
->accflags
& Modifier::PUBLIC
) != 0)
352 || (((method
->accflags
& Modifier::PROTECTED
) != 0)
353 && cls
->isAssignableFrom (klass
))
354 || (((method
->accflags
& Modifier::PRIVATE
) == 0)
355 && _Jv_ClassNameSamePackage (cls
->name
,
362 throw new java::lang::IllegalAccessError
;
368 // A helper for _Jv_PrepareClass. This adds missing `Miranda methods'
371 _Jv_PrepareMissingMethods (jclass base2
, jclass iface_class
)
373 _Jv_InterpClass
*base
= reinterpret_cast<_Jv_InterpClass
*> (base2
);
374 for (int i
= 0; i
< iface_class
->interface_count
; ++i
)
376 for (int j
= 0; j
< iface_class
->interfaces
[i
]->method_count
; ++j
)
378 _Jv_Method
*meth
= &iface_class
->interfaces
[i
]->methods
[j
];
379 // Don't bother with <clinit>.
380 if (meth
->name
->data
[0] == '<')
382 _Jv_Method
*new_meth
= _Jv_LookupDeclaredMethod (base
, meth
->name
,
386 // We assume that such methods are very unlikely, so we
387 // just reallocate the method array each time one is
388 // found. This greatly simplifies the searching --
389 // otherwise we have to make sure that each such method
390 // found is really unique among all superinterfaces.
391 int new_count
= base
->method_count
+ 1;
393 = (_Jv_Method
*) _Jv_AllocBytes (sizeof (_Jv_Method
)
395 memcpy (new_m
, base
->methods
,
396 sizeof (_Jv_Method
) * base
->method_count
);
399 new_m
[base
->method_count
] = *meth
;
400 new_m
[base
->method_count
].index
= (_Jv_ushort
) -1;
401 new_m
[base
->method_count
].accflags
402 |= java::lang::reflect::Modifier::INVISIBLE
;
404 _Jv_MethodBase
**new_im
405 = (_Jv_MethodBase
**) _Jv_AllocBytes (sizeof (_Jv_MethodBase
*)
407 memcpy (new_im
, base
->interpreted_methods
,
408 sizeof (_Jv_MethodBase
*) * base
->method_count
);
410 base
->methods
= new_m
;
411 base
->interpreted_methods
= new_im
;
412 base
->method_count
= new_count
;
416 _Jv_PrepareMissingMethods (base
, iface_class
->interfaces
[i
]);
421 _Jv_PrepareClass(jclass klass
)
423 using namespace java::lang::reflect
;
426 * The job of this function is to: 1) assign storage to fields, and 2)
427 * build the vtable. static fields are assigned real memory, instance
428 * fields are assigned offsets.
430 * NOTE: we have a contract with the garbage collector here. Static
431 * reference fields must not be resolved, until after they have storage
432 * assigned which is the check used by the collector to see if it
433 * should indirect the static field reference and mark the object
436 * Most fields are resolved lazily (i.e. have their class-type
437 * assigned) when they are accessed the first time by calling as part
438 * of _Jv_ResolveField, which is allways called after _Jv_PrepareClass.
439 * Static fields with initializers are resolved as part of this
440 * function, as are fields with primitive types.
443 if (! _Jv_IsInterpretedClass (klass
))
446 if (klass
->state
>= JV_STATE_PREPARED
)
449 // Make sure super-class is linked. This involves taking a lock on
450 // the super class, so we use the Java method resolveClass, which
451 // will unlock it properly, should an exception happen. If there's
452 // no superclass, do nothing -- Object will already have been
455 if (klass
->superclass
)
456 java::lang::ClassLoader::resolveClass0 (klass
->superclass
);
458 _Jv_InterpClass
*clz
= (_Jv_InterpClass
*)klass
;
460 /************ PART ONE: OBJECT LAYOUT ***************/
465 // Although java.lang.Object is never interpreted, an interface can
466 // have a null superclass.
468 instance_size
= clz
->superclass
->size();
470 instance_size
= java::lang::Object::class$
.size();
473 for (int i
= 0; i
< clz
->field_count
; i
++)
478 _Jv_Field
*field
= &clz
->fields
[i
];
480 if (! field
->isRef ())
482 // it's safe to resolve the field here, since it's
483 // a primitive class, which does not cause loading to happen.
484 _Jv_ResolveField (field
, clz
->loader
);
486 field_size
= field
->type
->size ();
487 field_align
= get_alignment_from_class (field
->type
);
491 field_size
= sizeof (jobject
);
492 field_align
= __alignof__ (jobject
);
495 #ifndef COMPACT_FIELDS
496 field
->bsize
= field_size
;
499 if (field
->flags
& Modifier::STATIC
)
501 /* this computes an offset into a region we'll allocate
502 shortly, and then add this offset to the start address */
504 static_size
= ROUND (static_size
, field_align
);
505 field
->u
.boffset
= static_size
;
506 static_size
+= field_size
;
510 instance_size
= ROUND (instance_size
, field_align
);
511 field
->u
.boffset
= instance_size
;
512 instance_size
+= field_size
;
516 // set the instance size for the class
517 clz
->size_in_bytes
= instance_size
;
519 // allocate static memory
520 if (static_size
!= 0)
522 char *static_data
= (char*)_Jv_AllocBytes (static_size
);
524 memset (static_data
, 0, static_size
);
526 for (int i
= 0; i
< clz
->field_count
; i
++)
528 _Jv_Field
*field
= &clz
->fields
[i
];
530 if ((field
->flags
& Modifier::STATIC
) != 0)
532 field
->u
.addr
= static_data
+ field
->u
.boffset
;
534 if (clz
->field_initializers
[i
] != 0)
536 _Jv_ResolveField (field
, clz
->loader
);
537 _Jv_InitField (0, clz
, i
);
542 // now we don't need the field_initializers anymore, so let the
543 // collector get rid of it!
545 clz
->field_initializers
= 0;
548 /************ PART TWO: VTABLE LAYOUT ***************/
550 /* preparation: build the vtable stubs (even interfaces can)
551 have code -- for static constructors. */
552 for (int i
= 0; i
< clz
->method_count
; i
++)
554 _Jv_MethodBase
*imeth
= clz
->interpreted_methods
[i
];
556 if ((clz
->methods
[i
].accflags
& Modifier::NATIVE
) != 0)
558 // You might think we could use a virtual `ncode' method in
559 // the _Jv_MethodBase and unify the native and non-native
560 // cases. Well, we can't, because we don't allocate these
561 // objects using `new', and thus they don't get a vtable.
562 _Jv_JNIMethod
*jnim
= reinterpret_cast<_Jv_JNIMethod
*> (imeth
);
563 clz
->methods
[i
].ncode
= jnim
->ncode ();
565 else if (imeth
!= 0) // it could be abstract
567 _Jv_InterpMethod
*im
= reinterpret_cast<_Jv_InterpMethod
*> (imeth
);
568 _Jv_VerifyMethod (im
);
569 clz
->methods
[i
].ncode
= im
->ncode ();
573 if ((clz
->accflags
& Modifier::INTERFACE
))
575 clz
->state
= JV_STATE_PREPARED
;
580 // A class might have so-called "Miranda methods". This is a method
581 // that is declared in an interface and not re-declared in an
582 // abstract class. Some compilers don't emit declarations for such
583 // methods in the class; this will give us problems since we expect
584 // a declaration for any method requiring a vtable entry. We handle
585 // this here by searching for such methods and constructing new
586 // internal declarations for them. We only need to do this for
588 if ((clz
->accflags
& Modifier::ABSTRACT
))
589 _Jv_PrepareMissingMethods (clz
, clz
);
591 clz
->vtable_method_count
= -1;
592 _Jv_MakeVTable (clz
);
594 /* wooha! we're done. */
595 clz
->state
= JV_STATE_PREPARED
;
599 /** Do static initialization for fields with a constant initializer */
601 _Jv_InitField (jobject obj
, jclass klass
, int index
)
603 using namespace java::lang::reflect
;
605 if (obj
!= 0 && klass
== 0)
606 klass
= obj
->getClass ();
608 if (!_Jv_IsInterpretedClass (klass
))
611 _Jv_InterpClass
*clz
= (_Jv_InterpClass
*)klass
;
613 _Jv_Field
* field
= (&clz
->fields
[0]) + index
;
615 if (index
> clz
->field_count
)
616 throw_internal_error ("field out of range");
618 int init
= clz
->field_initializers
[index
];
622 _Jv_Constants
*pool
= &clz
->constants
;
623 int tag
= pool
->tags
[init
];
625 if (! field
->isResolved ())
626 throw_internal_error ("initializing unresolved field");
628 if (obj
==0 && ((field
->flags
& Modifier::STATIC
) == 0))
629 throw_internal_error ("initializing non-static field with no object");
633 if ((field
->flags
& Modifier::STATIC
) != 0)
634 addr
= (void*) field
->u
.addr
;
636 addr
= (void*) (((char*)obj
) + field
->u
.boffset
);
640 case JV_CONSTANT_String
:
642 _Jv_MonitorEnter (clz
);
644 str
= _Jv_NewStringUtf8Const (pool
->data
[init
].utf8
);
645 pool
->data
[init
].string
= str
;
646 pool
->tags
[init
] = JV_CONSTANT_ResolvedString
;
647 _Jv_MonitorExit (clz
);
651 case JV_CONSTANT_ResolvedString
:
652 if (! (field
->type
== &StringClass
653 || field
->type
== &java::lang::Class::class$
))
654 throw_class_format_error ("string initialiser to non-string field");
656 *(jstring
*)addr
= pool
->data
[init
].string
;
659 case JV_CONSTANT_Integer
:
661 int value
= pool
->data
[init
].i
;
663 if (field
->type
== JvPrimClass (boolean
))
664 *(jboolean
*)addr
= (jboolean
)value
;
666 else if (field
->type
== JvPrimClass (byte
))
667 *(jbyte
*)addr
= (jbyte
)value
;
669 else if (field
->type
== JvPrimClass (char))
670 *(jchar
*)addr
= (jchar
)value
;
672 else if (field
->type
== JvPrimClass (short))
673 *(jshort
*)addr
= (jshort
)value
;
675 else if (field
->type
== JvPrimClass (int))
676 *(jint
*)addr
= (jint
)value
;
679 throw_class_format_error ("erroneous field initializer");
683 case JV_CONSTANT_Long
:
684 if (field
->type
!= JvPrimClass (long))
685 throw_class_format_error ("erroneous field initializer");
687 *(jlong
*)addr
= _Jv_loadLong (&pool
->data
[init
]);
690 case JV_CONSTANT_Float
:
691 if (field
->type
!= JvPrimClass (float))
692 throw_class_format_error ("erroneous field initializer");
694 *(jfloat
*)addr
= pool
->data
[init
].f
;
697 case JV_CONSTANT_Double
:
698 if (field
->type
!= JvPrimClass (double))
699 throw_class_format_error ("erroneous field initializer");
701 *(jdouble
*)addr
= _Jv_loadDouble (&pool
->data
[init
]);
705 throw_class_format_error ("erroneous field initializer");
710 get_alignment_from_class (jclass klass
)
712 if (klass
== JvPrimClass (byte
))
713 return __alignof__ (jbyte
);
714 else if (klass
== JvPrimClass (short))
715 return __alignof__ (jshort
);
716 else if (klass
== JvPrimClass (int))
717 return __alignof__ (jint
);
718 else if (klass
== JvPrimClass (long))
719 return __alignof__ (jlong
);
720 else if (klass
== JvPrimClass (boolean
))
721 return __alignof__ (jboolean
);
722 else if (klass
== JvPrimClass (char))
723 return __alignof__ (jchar
);
724 else if (klass
== JvPrimClass (float))
725 return __alignof__ (jfloat
);
726 else if (klass
== JvPrimClass (double))
727 return __alignof__ (jdouble
);
729 return __alignof__ (jobject
);
733 inline static unsigned char*
734 skip_one_type (unsigned char* ptr
)
745 do { ch
= *ptr
++; } while (ch
!= ';');
752 get_ffi_type_from_signature (unsigned char* ptr
)
758 return &ffi_type_pointer
;
762 // On some platforms a bool is a byte, on others an int.
763 if (sizeof (jboolean
) == sizeof (jbyte
))
764 return &ffi_type_sint8
;
767 JvAssert (sizeof (jbyte
) == sizeof (jint
));
768 return &ffi_type_sint32
;
773 return &ffi_type_sint8
;
777 return &ffi_type_uint16
;
781 return &ffi_type_sint16
;
785 return &ffi_type_sint32
;
789 return &ffi_type_sint64
;
793 return &ffi_type_float
;
797 return &ffi_type_double
;
801 return &ffi_type_void
;
805 throw_internal_error ("unknown type in signature");
808 /* this function yields the number of actual arguments, that is, if the
809 * function is non-static, then one is added to the number of elements
810 * found in the signature */
813 _Jv_count_arguments (_Jv_Utf8Const
*signature
,
816 unsigned char *ptr
= (unsigned char*) signature
->data
;
817 int arg_count
= staticp
? 0 : 1;
819 /* first, count number of arguments */
827 ptr
= skip_one_type (ptr
);
834 /* This beast will build a cif, given the signature. Memory for
835 * the cif itself and for the argument types must be allocated by the
840 init_cif (_Jv_Utf8Const
* signature
,
844 ffi_type
**arg_types
,
847 unsigned char *ptr
= (unsigned char*) signature
->data
;
849 int arg_index
= 0; // arg number
850 int item_count
= 0; // stack-item count
855 arg_types
[arg_index
++] = &ffi_type_pointer
;
865 arg_types
[arg_index
++] = get_ffi_type_from_signature (ptr
);
867 if (*ptr
== 'J' || *ptr
== 'D')
872 ptr
= skip_one_type (ptr
);
877 ffi_type
*rtype
= get_ffi_type_from_signature (ptr
);
879 ptr
= skip_one_type (ptr
);
880 if (ptr
!= (unsigned char*)signature
->data
+ signature
->length
)
881 throw_internal_error ("did not find end of signature");
883 if (ffi_prep_cif (cif
, FFI_DEFAULT_ABI
,
884 arg_count
, rtype
, arg_types
) != FFI_OK
)
885 throw_internal_error ("ffi_prep_cif failed");
893 #if FFI_NATIVE_RAW_API
894 # define FFI_PREP_RAW_CLOSURE ffi_prep_raw_closure
895 # define FFI_RAW_SIZE ffi_raw_size
897 # define FFI_PREP_RAW_CLOSURE ffi_prep_java_raw_closure
898 # define FFI_RAW_SIZE ffi_java_raw_size
901 /* we put this one here, and not in interpret.cc because it
902 * calls the utility routines _Jv_count_arguments
903 * which are static to this module. The following struct defines the
904 * layout we use for the stubs, it's only used in the ncode method. */
907 ffi_raw_closure closure
;
909 ffi_type
*arg_types
[0];
912 typedef void (*ffi_closure_fun
) (ffi_cif
*,void*,ffi_raw
*,void*);
915 _Jv_InterpMethod::ncode ()
917 using namespace java::lang::reflect
;
919 if (self
->ncode
!= 0)
922 jboolean staticp
= (self
->accflags
& Modifier::STATIC
) != 0;
923 int arg_count
= _Jv_count_arguments (self
->signature
, staticp
);
925 ncode_closure
*closure
=
926 (ncode_closure
*)_Jv_AllocBytes (sizeof (ncode_closure
)
927 + arg_count
* sizeof (ffi_type
*));
929 init_cif (self
->signature
,
933 &closure
->arg_types
[0],
938 args_raw_size
= FFI_RAW_SIZE (&closure
->cif
);
940 JvAssert ((self
->accflags
& Modifier::NATIVE
) == 0);
942 if ((self
->accflags
& Modifier::SYNCHRONIZED
) != 0)
945 fun
= (ffi_closure_fun
)&_Jv_InterpMethod::run_synch_class
;
947 fun
= (ffi_closure_fun
)&_Jv_InterpMethod::run_synch_object
;
952 fun
= (ffi_closure_fun
)&_Jv_InterpMethod::run_class
;
954 fun
= (ffi_closure_fun
)&_Jv_InterpMethod::run_normal
;
957 FFI_PREP_RAW_CLOSURE (&closure
->closure
,
962 self
->ncode
= (void*)closure
;
967 _Jv_JNIMethod::ncode ()
969 using namespace java::lang::reflect
;
971 if (self
->ncode
!= 0)
974 jboolean staticp
= (self
->accflags
& Modifier::STATIC
) != 0;
975 int arg_count
= _Jv_count_arguments (self
->signature
, staticp
);
977 ncode_closure
*closure
=
978 (ncode_closure
*)_Jv_AllocBytes (sizeof (ncode_closure
)
979 + arg_count
* sizeof (ffi_type
*));
982 init_cif (self
->signature
,
986 &closure
->arg_types
[0],
991 args_raw_size
= FFI_RAW_SIZE (&closure
->cif
);
993 // Initialize the argument types and CIF that represent the actual
994 // underlying JNI function.
996 if ((self
->accflags
& Modifier::STATIC
))
998 jni_arg_types
= (ffi_type
**) _Jv_Malloc ((extra_args
+ arg_count
)
999 * sizeof (ffi_type
*));
1001 jni_arg_types
[offset
++] = &ffi_type_pointer
;
1002 if ((self
->accflags
& Modifier::STATIC
))
1003 jni_arg_types
[offset
++] = &ffi_type_pointer
;
1004 memcpy (&jni_arg_types
[offset
], &closure
->arg_types
[0],
1005 arg_count
* sizeof (ffi_type
*));
1007 if (ffi_prep_cif (&jni_cif
, _Jv_platform_ffi_abi
,
1008 extra_args
+ arg_count
, rtype
,
1009 jni_arg_types
) != FFI_OK
)
1010 throw_internal_error ("ffi_prep_cif failed for JNI function");
1012 JvAssert ((self
->accflags
& Modifier::NATIVE
) != 0);
1014 // FIXME: for now we assume that all native methods for
1015 // interpreted code use JNI.
1016 fun
= (ffi_closure_fun
) &_Jv_JNIMethod::call
;
1018 FFI_PREP_RAW_CLOSURE (&closure
->closure
,
1023 self
->ncode
= (void *) closure
;
1028 /* A _Jv_ResolvedMethod is what is put in the constant pool for a
1029 * MethodRef or InterfacemethodRef. */
1030 static _Jv_ResolvedMethod
*
1031 _Jv_BuildResolvedMethod (_Jv_Method
* method
,
1036 int arg_count
= _Jv_count_arguments (method
->signature
, staticp
);
1038 _Jv_ResolvedMethod
* result
= (_Jv_ResolvedMethod
*)
1039 _Jv_AllocBytes (sizeof (_Jv_ResolvedMethod
)
1040 + arg_count
*sizeof (ffi_type
*));
1042 result
->stack_item_count
1043 = init_cif (method
->signature
,
1047 &result
->arg_types
[0],
1050 result
->vtable_index
= vtable_index
;
1051 result
->method
= method
;
1052 result
->klass
= klass
;
1059 throw_class_format_error (jstring msg
)
1062 ? new java::lang::ClassFormatError (msg
)
1063 : new java::lang::ClassFormatError
);
1067 throw_class_format_error (char *msg
)
1069 throw_class_format_error (JvNewStringLatin1 (msg
));
1073 throw_internal_error (char *msg
)
1075 throw new java::lang::InternalError (JvNewStringLatin1 (msg
));
1079 #endif /* INTERPRETER */