1 // resolve.cc - Code for linking and resolving classes and pool entries.
3 /* Copyright (C) 1999, 2000 Red Hat, Inc.
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> */
15 #include <java-interp.h>
20 #include <java-cpool.h>
21 #include <java/lang/Class.h>
22 #include <java/lang/String.h>
23 #include <java/lang/Thread.h>
24 #include <java/lang/InternalError.h>
25 #include <java/lang/VirtualMachineError.h>
26 #include <java/lang/NoSuchFieldError.h>
27 #include <java/lang/ClassFormatError.h>
28 #include <java/lang/IllegalAccessError.h>
29 #include <java/lang/AbstractMethodError.h>
30 #include <java/lang/ClassNotFoundException.h>
31 #include <java/lang/IncompatibleClassChangeError.h>
32 #include <java/lang/reflect/Modifier.h>
36 static void throw_internal_error (char *msg)
37 __attribute__ ((__noreturn__));
38 static void throw_class_format_error (jstring msg)
39 __attribute__ ((__noreturn__));
40 static void throw_class_format_error (char *msg)
41 __attribute__ ((__noreturn__));
43 #define ClassObject _CL_Q34java4lang6Object
44 extern java::lang::Class ClassObject;
45 #define ObjectClass _CL_Q34java4lang6Object
46 extern java::lang::Class ObjectClass;
49 static int get_alignment_from_class (jclass);
51 static _Jv_ResolvedMethod*
52 _Jv_BuildResolvedMethod (_Jv_Method*,
58 // We need to know the name of a constructor.
59 static _Jv_Utf8Const *init_name = _Jv_makeUtf8Const ("<init>", 6);
61 static void throw_incompatible_class_change_error (jstring msg)
63 JvThrow (new java::lang::IncompatibleClassChangeError (msg));
67 _Jv_ResolvePoolEntry (jclass klass, int index)
69 using namespace java::lang::reflect;
71 _Jv_Constants *pool = &klass->constants;
73 if ((pool->tags[index] & JV_CONSTANT_ResolvedFlag) != 0)
74 return pool->data[index];
76 switch (pool->tags[index]) {
77 case JV_CONSTANT_Class:
79 _Jv_Utf8Const *name = pool->data[index].utf8;
82 if (name->data[0] == '[')
83 found = _Jv_FindClassFromSignature (&name->data[0],
86 found = _Jv_FindClass (name, klass->loader);
90 jstring str = _Jv_NewStringUTF (name->data);
91 JvThrow (new java::lang::ClassNotFoundException (str));
94 if ((found->accflags & Modifier::PUBLIC) == Modifier::PUBLIC
95 || (_Jv_ClassNameSamePackage (found->name,
98 pool->data[index].clazz = found;
99 pool->tags[index] |= JV_CONSTANT_ResolvedFlag;
103 JvThrow (new java::lang::IllegalAccessError (found->getName()));
108 case JV_CONSTANT_String:
111 str = _Jv_NewStringUtf8Const (pool->data[index].utf8);
112 pool->data[index].o = str;
113 pool->tags[index] |= JV_CONSTANT_ResolvedFlag;
118 case JV_CONSTANT_Fieldref:
120 _Jv_ushort class_index, name_and_type_index;
121 _Jv_loadIndexes (&pool->data[index],
123 name_and_type_index);
124 jclass owner = (_Jv_ResolvePoolEntry (klass, class_index)).clazz;
127 _Jv_InitClass (owner);
129 _Jv_ushort name_index, type_index;
130 _Jv_loadIndexes (&pool->data[name_and_type_index],
134 _Jv_Utf8Const *field_name = pool->data[name_index].utf8;
135 _Jv_Utf8Const *field_type_name = pool->data[type_index].utf8;
137 // FIXME: The implementation of this function
138 // (_Jv_FindClassFromSignature) will generate an instance of
139 // _Jv_Utf8Const for each call if the field type is a class name
140 // (Lxx.yy.Z;). This may be too expensive to do for each and
141 // every fieldref being resolved. For now, we fix the problem by
142 // only doing it when we have a loader different from the class
143 // declaring the field.
145 jclass field_type = 0;
147 if (owner->loader != klass->loader)
148 field_type = _Jv_FindClassFromSignature (field_type_name->data,
151 _Jv_Field* the_field = 0;
153 for (jclass cls = owner; cls != 0; cls = cls->getSuperclass ())
155 for (int i = 0; i < cls->field_count; i++)
157 _Jv_Field *field = &cls->fields[i];
158 if (! _Jv_equalUtf8Consts (field->name, field_name))
161 // now, check field access.
164 || ((field->flags & Modifier::PUBLIC) != 0)
165 || (((field->flags & Modifier::PROTECTED) != 0)
166 && cls->isAssignableFrom (klass))
167 || (((field->flags & Modifier::PRIVATE) == 0)
168 && _Jv_ClassNameSamePackage (cls->name,
171 /* resove the field using the class' own loader
174 if (!field->isResolved ())
175 _Jv_ResolveField (field, cls->loader);
177 if (field_type != 0 && field->type != field_type)
179 (new java::lang::LinkageError
181 ("field type mismatch with different loaders")));
184 goto end_of_field_search;
188 JvThrow (new java::lang::IllegalAccessError);
196 jstring msg = JvNewStringLatin1 ("field ");
197 msg = msg->concat (owner->getName ());
198 msg = msg->concat (JvNewStringLatin1("."));
199 msg = msg->concat (_Jv_NewStringUTF (field_name->data));
200 msg = msg->concat (JvNewStringLatin1(" was not found."));
201 throw_incompatible_class_change_error (msg);
204 pool->data[index].field = the_field;
205 pool->tags[index] |= JV_CONSTANT_ResolvedFlag;
209 case JV_CONSTANT_Methodref:
210 case JV_CONSTANT_InterfaceMethodref:
212 _Jv_ushort class_index, name_and_type_index;
213 _Jv_loadIndexes (&pool->data[index],
215 name_and_type_index);
216 jclass owner = (_Jv_ResolvePoolEntry (klass, class_index)).clazz;
219 _Jv_InitClass (owner);
221 _Jv_ushort name_index, type_index;
222 _Jv_loadIndexes (&pool->data[name_and_type_index],
226 _Jv_Utf8Const *method_name = pool->data[name_index].utf8;
227 _Jv_Utf8Const *method_signature = pool->data[type_index].utf8;
229 int vtable_index = -1;
230 _Jv_Method *the_method = 0;
231 jclass found_class = 0;
233 // we make a loop here, because methods are allowed to be moved to
234 // a super class, and still be visible.. (binary compatibility).
236 for (jclass cls = owner; cls != 0; cls = cls->getSuperclass ())
238 for (int i = 0; i < cls->method_count; i++)
240 _Jv_Method *method = &cls->methods[i];
241 if ( (!_Jv_equalUtf8Consts (method->name,
243 || (!_Jv_equalUtf8Consts (method->signature,
248 || ((method->accflags & Modifier::PUBLIC) != 0)
249 || (((method->accflags & Modifier::PROTECTED) != 0)
250 && cls->isAssignableFrom (klass))
251 || (((method->accflags & Modifier::PRIVATE) == 0)
252 && _Jv_ClassNameSamePackage (cls->name,
255 // FIXME: if (cls->loader != klass->loader), then we
256 // must actually check that the types of arguments
257 // correspond. That is, for each argument type, and
258 // the return type, doing _Jv_FindClassFromSignature
259 // with either loader should produce the same result,
260 // i.e., exactly the same jclass object. JVMS 5.4.3.3
266 if (pool->tags[index] == JV_CONSTANT_InterfaceMethodref)
269 vtable_index = _Jv_DetermineVTableIndex
270 (cls, method_name, method_signature);
272 if (vtable_index == 0)
273 throw_incompatible_class_change_error
274 (JvNewStringLatin1 ("method not found"));
276 goto end_of_method_search;
280 JvThrow (new java::lang::IllegalAccessError);
285 end_of_method_search:
288 jstring msg = JvNewStringLatin1 ("method ");
289 msg = msg->concat (owner->getName ());
290 msg = msg->concat (JvNewStringLatin1("."));
291 msg = msg->concat (_Jv_NewStringUTF (method_name->data));
292 msg = msg->concat (JvNewStringLatin1(" was not found."));
293 JvThrow(new java::lang::NoSuchFieldError (msg));
296 pool->data[index].rmethod =
297 _Jv_BuildResolvedMethod(the_method,
299 (the_method->accflags & Modifier::STATIC) != 0,
301 pool->tags[index] |= JV_CONSTANT_ResolvedFlag;
307 return pool->data[index];
312 _Jv_ResolveField (_Jv_Field *field, java::lang::ClassLoader *loader)
314 if (! field->isResolved ())
316 _Jv_Utf8Const *sig = (_Jv_Utf8Const*)field->type;
317 field->type = _Jv_FindClassFromSignature (sig->data, loader);
318 field->flags &= ~_Jv_FIELD_UNRESOLVED_FLAG;
322 /** FIXME: this is a terribly inefficient algorithm! It would improve
323 things if compiled classes to know vtable offset, and _Jv_Method had
326 Returns 0 if this class does not declare the given method.
327 Returns -1 if the given method does not appear in the vtable.
328 i.e., it is static, private, final or a constructor.
329 Otherwise, returns the vtable index. */
331 _Jv_DetermineVTableIndex (jclass klass,
333 _Jv_Utf8Const *signature)
335 using namespace java::lang::reflect;
337 jclass super_class = klass->getSuperclass ();
339 if (super_class != NULL)
341 int prev = _Jv_DetermineVTableIndex (super_class,
348 /* at this point, we know that the super-class does not declare
349 * the method. Otherwise, the above call would have found it, and
350 * determined the result of this function (-1 or some positive
354 _Jv_Method *meth = _Jv_GetMethodLocal (klass, name, signature);
356 /* now, if we do not declare this method, return zero */
360 /* so now, we know not only that the super class does not declare the
361 * method, but we do! So, this is a first declaration of the method. */
363 /* now, the checks for things that are declared in this class, but do
364 * not go into the vtable. There are three cases.
365 * 1) the method is static, private or final
366 * 2) the class itself is final, or
367 * 3) it is the method <init>
370 if ((meth->accflags & (Modifier::STATIC
372 | Modifier::FINAL)) != 0
373 || (klass->accflags & Modifier::FINAL) != 0
374 || _Jv_equalUtf8Consts (name, init_name))
377 /* reaching this point, we know for sure, that the method in question
378 * will be in the vtable. The question is where. */
380 /* the base offset, is where we will start assigning vtable
381 * indexes for this class. It is 1 for base classes
382 * (vtable->method[0] is unused), and for non-base classes it is the
383 * number of entries in the super class' vtable plus 1. */
386 if (super_class == 0)
389 base_offset = super_class->vtable_method_count+1;
391 /* we will consider methods 0..this_method_index-1. And for each one,
392 * determine if it is new (i.e., if it appears in the super class),
393 * and if it should go in the vtable. If so, increment base_offset */
395 int this_method_index = meth - (&klass->methods[0]);
397 for (int i = 0; i < this_method_index; i++)
399 _Jv_Method *m = &klass->methods[i];
401 /* fist some checks for things that surely do not go in the
404 if ((m->accflags & (Modifier::STATIC | Modifier::PRIVATE)) != 0)
406 if (_Jv_equalUtf8Consts (m->name, init_name))
409 /* Then, we need to know if this method appears in the
410 superclass. (This is where this function gets expensive) */
411 _Jv_Method *sm = _Jv_LookupDeclaredMethod (super_class,
415 /* if it was somehow declared in the superclass, skip this */
419 /* but if it is final, and not declared in the super class,
420 * then we also skip it */
421 if ((m->accflags & Modifier::FINAL) != 0)
424 /* finally, we can assign the index of this method */
425 /* m->vtable_index = base_offset */
432 /* this is installed in place of abstract methods */
434 _Jv_abstractMethodError ()
436 JvThrow (new java::lang::AbstractMethodError);
440 _Jv_PrepareClass(jclass klass)
442 using namespace java::lang::reflect;
445 * The job of this function is to: 1) assign storage to fields, and 2)
446 * build the vtable. static fields are assigned real memory, instance
447 * fields are assigned offsets.
449 * NOTE: we have a contract with the garbage collector here. Static
450 * reference fields must not be resolved, until after they have storage
451 * assigned which is the check used by the collector to see if it
452 * should indirect the static field reference and mark the object
455 * Most fields are resolved lazily (i.e. have their class-type
456 * assigned) when they are accessed the first time by calling as part
457 * of _Jv_ResolveField, which is allways called after _Jv_PrepareClass.
458 * Static fields with initializers are resolved as part of this
459 * function, as are fields with primitive types.
462 if (! _Jv_IsInterpretedClass (klass))
465 if (klass->state >= JV_STATE_PREPARED)
468 // make sure super-class is linked. This involves taking a lock on
469 // the super class, so we use the Java method resolveClass, which will
470 // unlock it properly, should an exception happen.
472 java::lang::ClassLoader::resolveClass0 (klass->superclass);
474 _Jv_InterpClass *clz = (_Jv_InterpClass*)klass;
476 /************ PART ONE: OBJECT LAYOUT ***************/
481 // java.lang.Object is never interpreted!
482 instance_size = clz->superclass->size ();
485 for (int i = 0; i < clz->field_count; i++)
490 _Jv_Field *field = &clz->fields[i];
492 if (! field->isRef ())
494 // it's safe to resolve the field here, since it's
495 // a primitive class, which does not cause loading to happen.
496 _Jv_ResolveField (field, clz->loader);
498 field_size = field->type->size ();
499 field_align = get_alignment_from_class (field->type);
503 field_size = sizeof (jobject);
504 field_align = __alignof__ (jobject);
507 #ifndef COMPACT_FIELDS
508 field->bsize = field_size;
511 if (field->flags & Modifier::STATIC)
513 /* this computes an offset into a region we'll allocate
514 shortly, and then add this offset to the start address */
516 static_size = ROUND (static_size, field_align);
517 field->u.boffset = static_size;
518 static_size += field_size;
522 instance_size = ROUND (instance_size, field_align);
523 field->u.boffset = instance_size;
524 instance_size += field_size;
528 // set the instance size for the class
529 clz->size_in_bytes = instance_size;
531 // allocate static memory
532 if (static_size != 0)
534 char *static_data = (char*)_Jv_AllocBytesChecked (static_size);
536 memset (static_data, 0, static_size);
538 for (int i = 0; i < clz->field_count; i++)
540 _Jv_Field *field = &clz->fields[i];
542 if ((field->flags & Modifier::STATIC) != 0)
544 field->u.addr = static_data + field->u.boffset;
546 if (clz->field_initializers[i] != 0)
548 _Jv_ResolveField (field, clz->loader);
549 _Jv_InitField (0, clz, i);
554 // now we don't need the field_initializers anymore, so let the
555 // collector get rid of it!
557 clz->field_initializers = 0;
560 /************ PART TWO: VTABLE LAYOUT ***************/
562 /* preparation: build the vtable stubs (even interfaces can)
563 have code -- for static constructors. */
564 for (int i = 0; i < clz->method_count; i++)
566 _Jv_MethodBase *imeth = clz->interpreted_methods[i];
568 if ((clz->methods[i].accflags & Modifier::NATIVE) != 0)
570 // You might think we could use a virtual `ncode' method in
571 // the _Jv_MethodBase and unify the native and non-native
572 // cases. Well, we can't, because we don't allocate these
573 // objects using `new', and thus they don't get a vtable.
574 _Jv_JNIMethod *jnim = reinterpret_cast<_Jv_JNIMethod *> (imeth);
575 clz->methods[i].ncode = jnim->ncode ();
577 else if (imeth != 0) // it could be abstract
579 _Jv_InterpMethod *im = reinterpret_cast<_Jv_InterpMethod *> (imeth);
580 clz->methods[i].ncode = im->ncode ();
584 if (clz->accflags & Modifier::INTERFACE)
586 clz->state = JV_STATE_PREPARED;
591 /* Now onto the actual job: vtable layout. First, count how many new
593 int new_method_count = 0;
595 jclass super_class = clz->getSuperclass ();
597 if (super_class == 0)
598 throw_internal_error ("cannot handle interpreted base classes");
600 for (int i = 0; i < clz->method_count; i++)
602 _Jv_Method *this_meth = &clz->methods[i];
604 if ((this_meth->accflags & (Modifier::STATIC | Modifier::PRIVATE)) != 0
605 || _Jv_equalUtf8Consts (this_meth->name, init_name))
607 /* skip this, it doesn't go in the vtable */
611 _Jv_Method *orig_meth = _Jv_LookupDeclaredMethod (super_class,
613 this_meth->signature);
617 // new methods that are final, also don't go in the vtable
618 if ((this_meth->accflags & Modifier::FINAL) != 0)
621 new_method_count += 1;
625 if ((orig_meth->accflags & (Modifier::STATIC
627 | Modifier::FINAL)) != 0
628 || ((orig_meth->accflags & Modifier::ABSTRACT) == 0
629 && (this_meth->accflags & Modifier::ABSTRACT) != 0
630 && (klass->accflags & Modifier::ABSTRACT) == 0))
632 clz->state = JV_STATE_ERROR;
634 JvThrow (new java::lang::IncompatibleClassChangeError
638 /* FIXME: At this point, if (loader != super_class->loader), we
639 * need to "impose class loader constraints" for the types
640 * involved in the signature of this method */
644 int vtable_count = (super_class->vtable_method_count) + new_method_count;
645 clz->vtable_method_count = vtable_count;
647 /* allocate vtable structure */
648 _Jv_VTable *vtable = (_Jv_VTable*)
649 _Jv_AllocBytesChecked (sizeof (_Jv_VTable)
650 + (sizeof (void*) * (vtable_count)));
654 jclass effective_superclass = super_class;
656 /* If super_class is abstract or an interface it has no vtable.
657 We need to find a real one... */
658 while (effective_superclass && effective_superclass->vtable == NULL)
659 effective_superclass = effective_superclass->superclass;
661 /* copy super class' vtable entries (index 0 goes unused). */
662 if (effective_superclass && effective_superclass->vtable)
663 memcpy ((void*)&vtable->method[1],
664 (void*)&effective_superclass->vtable->method[1],
665 sizeof (void*) * effective_superclass->vtable_method_count);
668 /* now, install our own vtable entries, reprise... */
669 for (int i = 0; i < clz->method_count; i++)
671 _Jv_Method *this_meth = &clz->methods[i];
673 int index = _Jv_DetermineVTableIndex (clz,
675 this_meth->signature);
678 throw_internal_error ("method now found in own class");
682 if (index > clz->vtable_method_count+1)
683 throw_internal_error ("vtable problem...");
685 if (clz->interpreted_methods[i] == 0)
686 vtable->method[index] = (void*)&_Jv_abstractMethodError;
688 vtable->method[index] = this_meth->ncode;
692 /* finally, assign the vtable! */
693 clz->vtable = vtable;
695 /* wooha! we're done. */
696 clz->state = JV_STATE_PREPARED;
700 /** Do static initialization for fields with a constant initializer */
702 _Jv_InitField (jobject obj, jclass klass, int index)
704 using namespace java::lang::reflect;
706 if (obj != 0 && klass == 0)
707 klass = obj->getClass ();
709 if (!_Jv_IsInterpretedClass (klass))
712 _Jv_InterpClass *clz = (_Jv_InterpClass*)klass;
714 _Jv_Field * field = (&clz->fields[0]) + index;
716 if (index > clz->field_count)
717 throw_internal_error ("field out of range");
719 int init = clz->field_initializers[index];
723 _Jv_Constants *pool = &clz->constants;
724 int tag = pool->tags[init];
726 if (! field->isResolved ())
727 throw_internal_error ("initializing unresolved field");
729 if (obj==0 && ((field->flags & Modifier::STATIC) == 0))
730 throw_internal_error ("initializing non-static field with no object");
734 if ((field->flags & Modifier::STATIC) != 0)
735 addr = (void*) field->u.addr;
737 addr = (void*) (((char*)obj) + field->u.boffset);
741 case JV_CONSTANT_String:
743 _Jv_MonitorEnter (clz);
745 str = _Jv_NewStringUtf8Const (pool->data[init].utf8);
746 pool->data[init].string = str;
747 pool->tags[init] = JV_CONSTANT_ResolvedString;
748 _Jv_MonitorExit (clz);
752 case JV_CONSTANT_ResolvedString:
753 if (! (field->type == &StringClass || field->type == &ObjectClass))
754 throw_class_format_error ("string initialiser to non-string field");
756 *(jstring*)addr = pool->data[init].string;
759 case JV_CONSTANT_Integer:
761 int value = pool->data[init].i;
763 if (field->type == JvPrimClass (boolean))
764 *(jboolean*)addr = (jboolean)value;
766 else if (field->type == JvPrimClass (byte))
767 *(jbyte*)addr = (jbyte)value;
769 else if (field->type == JvPrimClass (char))
770 *(jchar*)addr = (jchar)value;
772 else if (field->type == JvPrimClass (short))
773 *(jshort*)addr = (jshort)value;
775 else if (field->type == JvPrimClass (int))
776 *(jint*)addr = (jint)value;
779 throw_class_format_error ("erroneous field initializer");
783 case JV_CONSTANT_Long:
784 if (field->type != JvPrimClass (long))
785 throw_class_format_error ("erroneous field initializer");
787 *(jlong*)addr = _Jv_loadLong (&pool->data[init]);
790 case JV_CONSTANT_Float:
791 if (field->type != JvPrimClass (float))
792 throw_class_format_error ("erroneous field initializer");
794 *(jfloat*)addr = pool->data[init].f;
797 case JV_CONSTANT_Double:
798 if (field->type != JvPrimClass (double))
799 throw_class_format_error ("erroneous field initializer");
801 *(jdouble*)addr = _Jv_loadDouble (&pool->data[init]);
805 throw_class_format_error ("erroneous field initializer");
810 get_alignment_from_class (jclass klass)
812 if (klass == JvPrimClass (byte))
813 return __alignof__ (jbyte);
814 else if (klass == JvPrimClass (short))
815 return __alignof__ (jshort);
816 else if (klass == JvPrimClass (int))
817 return __alignof__ (jint);
818 else if (klass == JvPrimClass (long))
819 return __alignof__ (jlong);
820 else if (klass == JvPrimClass (boolean))
821 return __alignof__ (jboolean);
822 else if (klass == JvPrimClass (char))
823 return __alignof__ (jchar);
824 else if (klass == JvPrimClass (float))
825 return __alignof__ (jfloat);
826 else if (klass == JvPrimClass (double))
827 return __alignof__ (jdouble);
829 return __alignof__ (jobject);
833 inline static unsigned char*
834 skip_one_type (unsigned char* ptr)
845 do { ch = *ptr++; } while (ch != ';');
852 get_ffi_type_from_signature (unsigned char* ptr)
858 return &ffi_type_pointer;
862 // On some platforms a bool is a byte, on others an int.
863 if (sizeof (jboolean) == sizeof (jbyte))
864 return &ffi_type_sint8;
867 JvAssert (sizeof (jbyte) == sizeof (jint));
868 return &ffi_type_sint32;
873 return &ffi_type_sint8;
877 return &ffi_type_uint16;
881 return &ffi_type_sint16;
885 return &ffi_type_sint32;
889 return &ffi_type_sint64;
893 return &ffi_type_float;
897 return &ffi_type_double;
901 return &ffi_type_void;
905 throw_internal_error ("unknown type in signature");
908 /* this function yields the number of actual arguments, that is, if the
909 * function is non-static, then one is added to the number of elements
910 * found in the signature */
913 count_arguments (_Jv_Utf8Const *signature,
916 unsigned char *ptr = (unsigned char*) signature->data;
917 int arg_count = staticp ? 0 : 1;
919 /* first, count number of arguments */
927 ptr = skip_one_type (ptr);
934 /* This beast will build a cif, given the signature. Memory for
935 * the cif itself and for the argument types must be allocated by the
940 init_cif (_Jv_Utf8Const* signature,
944 ffi_type **arg_types,
947 unsigned char *ptr = (unsigned char*) signature->data;
949 int arg_index = 0; // arg number
950 int item_count = 0; // stack-item count
955 arg_types[arg_index++] = &ffi_type_pointer;
965 arg_types[arg_index++] = get_ffi_type_from_signature (ptr);
967 if (*ptr == 'J' || *ptr == 'D')
972 ptr = skip_one_type (ptr);
977 ffi_type *rtype = get_ffi_type_from_signature (ptr);
979 ptr = skip_one_type (ptr);
980 if (ptr != (unsigned char*)signature->data + signature->length)
981 throw_internal_error ("did not find end of signature");
983 if (ffi_prep_cif (cif, FFI_DEFAULT_ABI,
984 arg_count, rtype, arg_types) != FFI_OK)
985 throw_internal_error ("ffi_prep_cif failed");
994 /* we put this one here, and not in interpret.cc because it
995 * calls the utility routines count_arguments
996 * which are static to this module. The following struct defines the
997 * layout we use for the stubs, it's only used in the ncode method. */
1000 ffi_raw_closure closure;
1002 ffi_type *arg_types[0];
1005 typedef void (*ffi_closure_fun) (ffi_cif*,void*,ffi_raw*,void*);
1008 _Jv_InterpMethod::ncode ()
1010 using namespace java::lang::reflect;
1012 if (self->ncode != 0)
1015 jboolean staticp = (self->accflags & Modifier::STATIC) != 0;
1016 int arg_count = count_arguments (self->signature, staticp);
1018 ncode_closure *closure =
1019 (ncode_closure*)_Jv_AllocBytesChecked (sizeof (ncode_closure)
1020 + arg_count * sizeof (ffi_type*));
1022 init_cif (self->signature,
1026 &closure->arg_types[0],
1029 ffi_closure_fun fun;
1031 args_raw_size = ffi_raw_size (&closure->cif);
1033 JvAssert ((self->accflags & Modifier::NATIVE) == 0);
1035 if ((self->accflags & Modifier::SYNCHRONIZED) != 0)
1038 fun = (ffi_closure_fun)&_Jv_InterpMethod::run_synch_class;
1040 fun = (ffi_closure_fun)&_Jv_InterpMethod::run_synch_object;
1044 fun = (ffi_closure_fun)&_Jv_InterpMethod::run_normal;
1047 ffi_prep_raw_closure (&closure->closure,
1052 self->ncode = (void*)closure;
1058 _Jv_JNIMethod::ncode ()
1060 using namespace java::lang::reflect;
1062 if (self->ncode != 0)
1065 jboolean staticp = (self->accflags & Modifier::STATIC) != 0;
1066 int arg_count = count_arguments (self->signature, staticp);
1068 ncode_closure *closure =
1069 (ncode_closure*)_Jv_AllocBytesChecked (sizeof (ncode_closure)
1070 + arg_count * sizeof (ffi_type*));
1073 init_cif (self->signature,
1077 &closure->arg_types[0],
1080 ffi_closure_fun fun;
1082 args_raw_size = ffi_raw_size (&closure->cif);
1084 // Initialize the argument types and CIF that represent the actual
1085 // underlying JNI function.
1087 if ((self->accflags & Modifier::STATIC))
1089 jni_arg_types = (ffi_type **) _Jv_Malloc ((extra_args + arg_count)
1090 * sizeof (ffi_type *));
1092 jni_arg_types[offset++] = &ffi_type_pointer;
1093 if ((self->accflags & Modifier::STATIC))
1094 jni_arg_types[offset++] = &ffi_type_pointer;
1095 memcpy (&jni_arg_types[offset], &closure->arg_types[0],
1096 arg_count * sizeof (ffi_type *));
1098 if (ffi_prep_cif (&jni_cif, FFI_DEFAULT_ABI,
1099 extra_args + arg_count, rtype,
1100 jni_arg_types) != FFI_OK)
1101 throw_internal_error ("ffi_prep_cif failed for JNI function");
1103 JvAssert ((self->accflags & Modifier::NATIVE) != 0);
1105 // FIXME: for now we assume that all native methods for
1106 // interpreted code use JNI.
1107 fun = (ffi_closure_fun) &_Jv_JNIMethod::call;
1109 ffi_prep_raw_closure (&closure->closure,
1114 self->ncode = (void *) closure;
1119 /* A _Jv_ResolvedMethod is what is put in the constant pool for a
1120 * MethodRef or InterfacemethodRef. */
1121 static _Jv_ResolvedMethod*
1122 _Jv_BuildResolvedMethod (_Jv_Method* method,
1127 int arg_count = count_arguments (method->signature, staticp);
1129 _Jv_ResolvedMethod* result = (_Jv_ResolvedMethod*)
1130 _Jv_AllocBytesChecked (sizeof (_Jv_ResolvedMethod)
1131 + arg_count*sizeof (ffi_type*));
1133 result->stack_item_count
1134 = init_cif (method->signature,
1138 &result->arg_types[0],
1141 result->vtable_index = vtable_index;
1142 result->method = method;
1143 result->klass = klass;
1150 throw_class_format_error (jstring msg)
1153 JvThrow (new java::lang::ClassFormatError);
1155 JvThrow (new java::lang::ClassFormatError (msg));
1159 throw_class_format_error (char *msg)
1161 throw_class_format_error (JvNewStringLatin1 (msg));
1165 throw_internal_error (char *msg)
1168 (new java::lang::InternalError (JvNewStringLatin1 (msg)));
1172 #endif /* INTERPRETER */