// resolve.cc - Code for linking and resolving classes and pool entries.
-/* Copyright (C) 1999, 2000 Red Hat, Inc.
+/* Copyright (C) 1999, 2000, 2001 Free Software Foundation
This file is part of libgcj.
#include <java/lang/InternalError.h>
#include <java/lang/VirtualMachineError.h>
#include <java/lang/NoSuchFieldError.h>
+#include <java/lang/NoSuchMethodError.h>
#include <java/lang/ClassFormatError.h>
#include <java/lang/IllegalAccessError.h>
#include <java/lang/AbstractMethodError.h>
#include <java/lang/IncompatibleClassChangeError.h>
#include <java/lang/reflect/Modifier.h>
+void
+_Jv_ResolveField (_Jv_Field *field, java::lang::ClassLoader *loader)
+{
+ if (! field->isResolved ())
+ {
+ _Jv_Utf8Const *sig = (_Jv_Utf8Const*)field->type;
+ field->type = _Jv_FindClassFromSignature (sig->data, loader);
+ field->flags &= ~_Jv_FIELD_UNRESOLVED_FLAG;
+ }
+}
+
#ifdef INTERPRETER
static void throw_internal_error (char *msg)
static void throw_class_format_error (char *msg)
__attribute__ ((__noreturn__));
-#define ClassObject _CL_Q34java4lang6Object
-extern java::lang::Class ClassObject;
-#define ObjectClass _CL_Q34java4lang6Object
-extern java::lang::Class ObjectClass;
-
+// Exceptional return values for _Jv_DetermineVTableIndex
+#define METHOD_NOT_THERE (-2)
+#define METHOD_INACCESSIBLE (-1)
static int get_alignment_from_class (jclass);
static void throw_incompatible_class_change_error (jstring msg)
{
- JvThrow (new java::lang::IncompatibleClassChangeError (msg));
+ throw new java::lang::IncompatibleClassChangeError (msg);
}
_Jv_word
if (! found)
{
jstring str = _Jv_NewStringUTF (name->data);
- JvThrow (new java::lang::ClassNotFoundException (str));
+ throw new java::lang::ClassNotFoundException (str);
}
if ((found->accflags & Modifier::PUBLIC) == Modifier::PUBLIC
}
else
{
- JvThrow (new java::lang::IllegalAccessError (found->getName()));
+ throw new java::lang::IllegalAccessError (found->getName());
}
}
break;
_Jv_ResolveField (field, cls->loader);
if (field_type != 0 && field->type != field_type)
- JvThrow
- (new java::lang::LinkageError
- (JvNewStringLatin1
- ("field type mismatch with different loaders")));
+ throw new java::lang::LinkageError
+ (JvNewStringLatin1
+ ("field type mismatch with different loaders"));
the_field = field;
goto end_of_field_search;
}
else
{
- JvThrow (new java::lang::IllegalAccessError);
+ throw new java::lang::IllegalAccessError;
}
}
}
_Jv_Method *the_method = 0;
jclass found_class = 0;
- // we make a loop here, because methods are allowed to be moved to
- // a super class, and still be visible.. (binary compatibility).
+ // First search the class itself.
+ the_method = _Jv_SearchMethodInClass (owner, klass,
+ method_name, method_signature);
- for (jclass cls = owner; cls != 0; cls = cls->getSuperclass ())
- {
- for (int i = 0; i < cls->method_count; i++)
- {
- _Jv_Method *method = &cls->methods[i];
- if ( (!_Jv_equalUtf8Consts (method->name,
- method_name))
- || (!_Jv_equalUtf8Consts (method->signature,
- method_signature)))
- continue;
+ if (the_method != 0)
+ {
+ found_class = owner;
+ goto end_of_method_search;
+ }
- if (cls == klass
- || ((method->accflags & Modifier::PUBLIC) != 0)
- || (((method->accflags & Modifier::PROTECTED) != 0)
- && cls->isAssignableFrom (klass))
- || (((method->accflags & Modifier::PRIVATE) == 0)
- && _Jv_ClassNameSamePackage (cls->name,
- klass->name)))
- {
- // FIXME: if (cls->loader != klass->loader), then we
- // must actually check that the types of arguments
- // correspond. That is, for each argument type, and
- // the return type, doing _Jv_FindClassFromSignature
- // with either loader should produce the same result,
- // i.e., exactly the same jclass object. JVMS 5.4.3.3
-
- the_method = method;
+ // If we are resolving an interface method, search the interface's
+ // superinterfaces (A superinterface is not an interface's superclass -
+ // a superinterface is implemented by the interface).
+ if (pool->tags[index] == JV_CONSTANT_InterfaceMethodref)
+ {
+ _Jv_ifaces ifaces;
+ ifaces.count = 0;
+ ifaces.len = 4;
+ ifaces.list = (jclass *) _Jv_Malloc (ifaces.len * sizeof (jclass *));
+
+ _Jv_GetInterfaces (owner, &ifaces);
+
+ for (int i=0; i < ifaces.count; i++)
+ {
+ jclass cls = ifaces.list[i];
+ the_method = _Jv_SearchMethodInClass (cls, klass, method_name,
+ method_signature);
+ if (the_method != 0)
+ {
found_class = cls;
-
-
- if (pool->tags[index] == JV_CONSTANT_InterfaceMethodref)
- vtable_index = -1;
- else
- vtable_index = _Jv_DetermineVTableIndex
- (cls, method_name, method_signature);
-
- if (vtable_index == 0)
- throw_incompatible_class_change_error
- (JvNewStringLatin1 ("method not found"));
-
- goto end_of_method_search;
- }
- else
- {
- JvThrow (new java::lang::IllegalAccessError);
+ break;
}
}
+
+ _Jv_Free (ifaces.list);
+
+ if (the_method != 0)
+ goto end_of_method_search;
+ }
+
+ // Finally, search superclasses.
+ for (jclass cls = owner->getSuperclass (); cls != 0;
+ cls = cls->getSuperclass ())
+ {
+ the_method = _Jv_SearchMethodInClass (cls, klass,
+ method_name, method_signature);
+ if (the_method != 0)
+ {
+ found_class = cls;
+ break;
+ }
}
end_of_method_search:
+
+ // FIXME: if (cls->loader != klass->loader), then we
+ // must actually check that the types of arguments
+ // correspond. That is, for each argument type, and
+ // the return type, doing _Jv_FindClassFromSignature
+ // with either loader should produce the same result,
+ // i.e., exactly the same jclass object. JVMS 5.4.3.3
+
+ if (pool->tags[index] == JV_CONSTANT_InterfaceMethodref)
+ vtable_index = -1;
+ else
+ vtable_index = _Jv_DetermineVTableIndex
+ (found_class, method_name, method_signature);
+
+ if (vtable_index == METHOD_NOT_THERE)
+ throw_incompatible_class_change_error
+ (JvNewStringLatin1 ("method not found"));
+
if (the_method == 0)
{
jstring msg = JvNewStringLatin1 ("method ");
msg = msg->concat (JvNewStringLatin1("."));
msg = msg->concat (_Jv_NewStringUTF (method_name->data));
msg = msg->concat (JvNewStringLatin1(" was not found."));
- JvThrow(new java::lang::NoSuchFieldError (msg));
+ throw new java::lang::NoSuchMethodError (msg);
}
pool->data[index].rmethod =
return pool->data[index];
}
-
-void
-_Jv_ResolveField (_Jv_Field *field, java::lang::ClassLoader *loader)
+// Find a method declared in the cls that is referenced from klass and
+// perform access checks.
+_Jv_Method *
+_Jv_SearchMethodInClass (jclass cls, jclass klass,
+ _Jv_Utf8Const *method_name,
+ _Jv_Utf8Const *method_signature)
{
- if (! field->isResolved ())
+ using namespace java::lang::reflect;
+
+ for (int i = 0; i < cls->method_count; i++)
{
- _Jv_Utf8Const *sig = (_Jv_Utf8Const*)field->type;
- field->type = _Jv_FindClassFromSignature (sig->data, loader);
- field->flags &= ~_Jv_FIELD_UNRESOLVED_FLAG;
+ _Jv_Method *method = &cls->methods[i];
+ if ( (!_Jv_equalUtf8Consts (method->name,
+ method_name))
+ || (!_Jv_equalUtf8Consts (method->signature,
+ method_signature)))
+ continue;
+
+ if (cls == klass
+ || ((method->accflags & Modifier::PUBLIC) != 0)
+ || (((method->accflags & Modifier::PROTECTED) != 0)
+ && cls->isAssignableFrom (klass))
+ || (((method->accflags & Modifier::PRIVATE) == 0)
+ && _Jv_ClassNameSamePackage (cls->name,
+ klass->name)))
+ {
+ return method;
+ }
+ else
+ {
+ throw new java::lang::IllegalAccessError;
+ }
}
+ return 0;
}
/** FIXME: this is a terribly inefficient algorithm! It would improve
things if compiled classes to know vtable offset, and _Jv_Method had
a field for this.
- Returns 0 if this class does not declare the given method.
- Returns -1 if the given method does not appear in the vtable.
- i.e., it is static, private, final or a constructor.
+ Returns METHOD_NOT_THERE if this class does not declare the given method.
+ Returns METHOD_INACCESSIBLE if the given method does not appear in the
+ vtable, i.e., it is static, private, final or a constructor.
Otherwise, returns the vtable index. */
int
_Jv_DetermineVTableIndex (jclass klass,
int prev = _Jv_DetermineVTableIndex (super_class,
name,
signature);
- if (prev != 0)
+ if (prev != METHOD_NOT_THERE)
return prev;
}
/* now, if we do not declare this method, return zero */
if (meth == NULL)
- return 0;
+ return METHOD_NOT_THERE;
/* so now, we know not only that the super class does not declare the
* method, but we do! So, this is a first declaration of the method. */
| Modifier::FINAL)) != 0
|| (klass->accflags & Modifier::FINAL) != 0
|| _Jv_equalUtf8Consts (name, init_name))
- return -1;
+ return METHOD_INACCESSIBLE;
/* reaching this point, we know for sure, that the method in question
* will be in the vtable. The question is where. */
/* the base offset, is where we will start assigning vtable
- * indexes for this class. It is 1 for base classes
- * (vtable->method[0] is unused), and for non-base classes it is the
- * number of entries in the super class' vtable plus 1. */
+ * indexes for this class. It is 0 for base classes
+ * and for non-base classes it is the
+ * number of entries in the super class' vtable. */
int base_offset;
if (super_class == 0)
- base_offset = 1;
+ base_offset = 0;
else
- base_offset = super_class->vtable_method_count+1;
+ base_offset = super_class->vtable_method_count;
/* we will consider methods 0..this_method_index-1. And for each one,
* determine if it is new (i.e., if it appears in the super class),
static void
_Jv_abstractMethodError ()
{
- JvThrow (new java::lang::AbstractMethodError);
+ throw new java::lang::AbstractMethodError;
}
void
{
clz->state = JV_STATE_ERROR;
clz->notifyAll ();
- JvThrow (new java::lang::IncompatibleClassChangeError
- (clz->getName ()));
+ throw new java::lang::IncompatibleClassChangeError (clz->getName ());
}
/* FIXME: At this point, if (loader != super_class->loader), we
_Jv_AllocBytesChecked (sizeof (_Jv_VTable)
+ (sizeof (void*) * (vtable_count)));
vtable->clas = clz;
+ vtable->gc_descr = _Jv_BuildGCDescr(clz);
{
jclass effective_superclass = super_class;
while (effective_superclass && effective_superclass->vtable == NULL)
effective_superclass = effective_superclass->superclass;
- /* copy super class' vtable entries (index 0 goes unused). */
+ /* copy super class' vtable entries. */
if (effective_superclass && effective_superclass->vtable)
- memcpy ((void*)&vtable->method[1],
- (void*)&effective_superclass->vtable->method[1],
+ memcpy ((void*)&vtable->method[0],
+ (void*)&effective_superclass->vtable->method[0],
sizeof (void*) * effective_superclass->vtable_method_count);
}
this_meth->name,
this_meth->signature);
- if (index == 0)
+ if (index == METHOD_NOT_THERE)
throw_internal_error ("method now found in own class");
- if (index != -1)
+ if (index != METHOD_INACCESSIBLE)
{
- if (index > clz->vtable_method_count+1)
+ if (index > clz->vtable_method_count)
throw_internal_error ("vtable problem...");
if (clz->interpreted_methods[i] == 0)
/* fall through */
case JV_CONSTANT_ResolvedString:
- if (! (field->type == &StringClass || field->type == &ObjectClass))
+ if (! (field->type == &StringClass
+ || field->type == &java::lang::Class::class$))
throw_class_format_error ("string initialiser to non-string field");
*(jstring*)addr = pool->data[init].string;
return item_count;
}
+#if FFI_NATIVE_RAW_API
+# define FFI_PREP_RAW_CLOSURE ffi_prep_raw_closure
+# define FFI_RAW_SIZE ffi_raw_size
+#else
+# define FFI_PREP_RAW_CLOSURE ffi_prep_java_raw_closure
+# define FFI_RAW_SIZE ffi_java_raw_size
+#endif
/* we put this one here, and not in interpret.cc because it
* calls the utility routines count_arguments
ffi_closure_fun fun;
- args_raw_size = ffi_raw_size (&closure->cif);
+ args_raw_size = FFI_RAW_SIZE (&closure->cif);
JvAssert ((self->accflags & Modifier::NATIVE) == 0);
fun = (ffi_closure_fun)&_Jv_InterpMethod::run_normal;
}
- ffi_prep_raw_closure (&closure->closure,
- &closure->cif,
- fun,
- (void*) this);
+ FFI_PREP_RAW_CLOSURE (&closure->closure,
+ &closure->cif,
+ fun,
+ (void*)this);
self->ncode = (void*)closure;
return self->ncode;
ffi_closure_fun fun;
- args_raw_size = ffi_raw_size (&closure->cif);
+ args_raw_size = FFI_RAW_SIZE (&closure->cif);
// Initialize the argument types and CIF that represent the actual
// underlying JNI function.
// interpreted code use JNI.
fun = (ffi_closure_fun) &_Jv_JNIMethod::call;
- ffi_prep_raw_closure (&closure->closure,
+ FFI_PREP_RAW_CLOSURE (&closure->closure,
&closure->cif,
fun,
(void*) this);
static void
throw_class_format_error (jstring msg)
{
- if (msg == 0)
- JvThrow (new java::lang::ClassFormatError);
- else
- JvThrow (new java::lang::ClassFormatError (msg));
+ throw (msg
+ ? new java::lang::ClassFormatError (msg)
+ : new java::lang::ClassFormatError);
}
static void
static void
throw_internal_error (char *msg)
{
- JvThrow
- (new java::lang::InternalError (JvNewStringLatin1 (msg)));
+ throw new java::lang::InternalError (JvNewStringLatin1 (msg));
}
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