// natClass.cc - Implementation of java.lang.Class native methods.
-/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation
+/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
+ Free Software Foundation
This file is part of libgcj.
#include <limits.h>
#include <string.h>
+#include <stddef.h>
+#include <stdio.h>
#pragma implementation "Class.h"
#include <java/lang/SecurityManager.h>
#include <java/lang/StringBuffer.h>
#include <java/lang/VMClassLoader.h>
-#include <gnu/gcj/runtime/StackTrace.h>
#include <gcj/method.h>
-#include <gnu/gcj/runtime/MethodRef.h>
#include <gnu/gcj/RawData.h>
+#include <java/lang/VerifyError.h>
#include <java-cpool.h>
+#include <java-interp.h>
+#include <java-assert.h>
+#include <java-stack.h>
+#include <execution.h>
\f
jsize length = _Jv_GetStringUTFLength (className);
char buffer[length];
- _Jv_GetStringUTFRegion (className, 0, length, buffer);
+ _Jv_GetStringUTFRegion (className, 0, className->length(), buffer);
_Jv_Utf8Const *name = _Jv_makeUtf8Const (buffer, length);
throw new java::lang::ClassNotFoundException (className);
jclass klass = (buffer[0] == '['
- ? _Jv_FindClassFromSignature (name->data, loader)
+ ? _Jv_FindClassFromSignature (name->chars(), loader)
: _Jv_FindClass (name, loader));
if (klass == NULL)
java::lang::Class::forName (jstring className)
{
java::lang::ClassLoader *loader = NULL;
- gnu::gcj::runtime::StackTrace *t
- = new gnu::gcj::runtime::StackTrace(4);
- java::lang::Class *klass = NULL;
- try
- {
- for (int i = 1; !klass; i++)
- {
- klass = t->classAt (i);
- }
- loader = klass->getClassLoaderInternal();
- }
- catch (::java::lang::ArrayIndexOutOfBoundsException *e)
- {
- }
+
+ jclass caller = _Jv_StackTrace::GetCallingClass (&Class::class$);
+ if (caller)
+ loader = caller->getClassLoaderInternal();
return forName (className, true, loader);
}
java::lang::SecurityManager *s = java::lang::System::getSecurityManager();
if (s != NULL)
{
- gnu::gcj::runtime::StackTrace *t
- = new gnu::gcj::runtime::StackTrace(4);
- Class *caller = NULL;
+ jclass caller = _Jv_StackTrace::GetCallingClass (&Class::class$);
ClassLoader *caller_loader = NULL;
- try
- {
- for (int i = 1; !caller; i++)
- {
- caller = t->classAt (i);
- }
- caller_loader = caller->getClassLoaderInternal();
- }
- catch (::java::lang::ArrayIndexOutOfBoundsException *e)
- {
- }
+ if (caller)
+ caller_loader = caller->getClassLoaderInternal();
// If the caller has a non-null class loader, and that loader
// is not this class' loader or an ancestor thereof, then do a
s->checkPermission (new RuntimePermission (JvNewStringLatin1 ("getClassLoader")));
}
- // The spec requires us to return `null' for primitive classes. In
- // other cases we have the option of returning `null' for classes
- // loaded with the bootstrap loader. All gcj-compiled classes which
- // are linked into the application used to return `null' here, but
- // that confuses some poorly-written applications. It is a useful
- // and apparently harmless compatibility hack to simply never return
- // `null' instead.
- if (isPrimitive ())
- return NULL;
- return loader ? loader : ClassLoader::getSystemClassLoader ();
+ return loader;
}
java::lang::reflect::Constructor *
}
JArray<java::lang::reflect::Constructor *> *
-java::lang::Class::_getConstructors (jboolean declared)
+java::lang::Class::getDeclaredConstructors (jboolean publicOnly)
{
- memberAccessCheck(java::lang::reflect::Member::PUBLIC);
-
int numConstructors = 0;
int max = isPrimitive () ? 0 : method_count;
int i;
if (method->name == NULL
|| ! _Jv_equalUtf8Consts (method->name, init_name))
continue;
- if (! declared
+ if (publicOnly
&& ! java::lang::reflect::Modifier::isPublic(method->accflags))
continue;
numConstructors++;
if (method->name == NULL
|| ! _Jv_equalUtf8Consts (method->name, init_name))
continue;
- if (! declared
+ if (publicOnly
&& ! java::lang::reflect::Modifier::isPublic(method->accflags))
continue;
java::lang::reflect::Constructor *cons
jstring
java::lang::Class::getName (void)
{
- char buffer[name->length + 1];
- memcpy (buffer, name->data, name->length);
- buffer[name->length] = '\0';
- return _Jv_NewStringUTF (buffer);
-}
-
-JArray<jclass> *
-java::lang::Class::getClasses (void)
-{
- // FIXME: security checking.
-
- // Until we have inner classes, it always makes sense to return an
- // empty array.
- JArray<jclass> *result
- = (JArray<jclass> *) JvNewObjectArray (0, &java::lang::Class::class$,
- NULL);
- return result;
+ return name->toString();
}
JArray<jclass> *
-java::lang::Class::getDeclaredClasses (void)
+java::lang::Class::getDeclaredClasses (jboolean /*publicOnly*/)
{
- memberAccessCheck (java::lang::reflect::Member::DECLARED);
// Until we have inner classes, it always makes sense to return an
// empty array.
JArray<jclass> *result
jobjectArray r = JvNewObjectArray (interface_count, getClass (), NULL);
jobject *data = elements (r);
for (int i = 0; i < interface_count; ++i)
- data[i] = interfaces[i];
+ {
+ typedef unsigned int uaddr __attribute__ ((mode (pointer)));
+ data[i] = interfaces[i];
+ if ((uaddr)data[i] < (uaddr)constants.size)
+ fprintf (stderr, "ERROR !!!\n");
+ }
return reinterpret_cast<JArray<jclass> *> (r);
}
jstring partial_sig = getSignature (param_types, false);
jint p_len = partial_sig->length();
_Jv_Utf8Const *utf_name = _Jv_makeUtf8Const (name);
- for (Class *klass = this; klass; klass = klass->getSuperclass())
+
+ for (Class *klass = this; klass; klass = klass->getSuperclass())
{
int i = klass->isPrimitive () ? 0 : klass->method_count;
while (--i >= 0)
java::lang::Class::isAssignableFrom (jclass klass)
{
// Arguments may not have been initialized, given ".class" syntax.
- _Jv_InitClass (this);
- _Jv_InitClass (klass);
- return _Jv_IsAssignableFrom (this, klass);
+ // This ensures we can at least look at their superclasses.
+ _Jv_Linker::wait_for_state (this, JV_STATE_LOADING);
+ _Jv_Linker::wait_for_state (klass, JV_STATE_LOADING);
+ return _Jv_IsAssignableFrom (klass, this);
}
jboolean
{
if (! obj)
return false;
- _Jv_InitClass (this);
- return _Jv_IsAssignableFrom (this, JV_CLASS (obj));
+ return _Jv_IsAssignableFrom (JV_CLASS (obj), this);
}
jobject
_Jv_Method *meth = _Jv_GetMethodLocal (this, init_name, void_signature);
if (! meth)
- throw new java::lang::NoSuchMethodException (_Jv_NewStringUtf8Const (init_name));
+ throw new java::lang::InstantiationException (getName());
- jobject r = JvAllocObject (this);
+ jobject r = _Jv_AllocObject (this);
((void (*) (jobject)) meth->ncode) (r);
return r;
}
void
java::lang::Class::finalize (void)
{
-#ifdef INTERPRETER
- JvAssert (_Jv_IsInterpretedClass (this));
- _Jv_UnregisterClass (this);
-#endif
+ engine->unregister(this);
}
// This implements the initialization process for a class. From Spec
void
java::lang::Class::initializeClass (void)
{
- // short-circuit to avoid needless locking.
- if (state == JV_STATE_DONE)
+ // Short-circuit to avoid needless locking (expression includes
+ // JV_STATE_PHANTOM and JV_STATE_DONE).
+ if (state >= JV_STATE_PHANTOM)
return;
- // Step 1.
- _Jv_MonitorEnter (this);
+ // Step 1. We introduce a new scope so we can synchronize more
+ // easily.
+ {
+ JvSynchronize sync (this);
- if (state < JV_STATE_LINKED)
- {
-#ifdef INTERPRETER
- if (_Jv_IsInterpretedClass (this))
- {
- // this can throw exceptions, so exit the monitor as a precaution.
- _Jv_MonitorExit (this);
- java::lang::VMClassLoader::resolveClass (this);
- _Jv_MonitorEnter (this);
- }
- else
-#endif
- {
- _Jv_PrepareCompiledClass (this);
- }
- }
+ if (state < JV_STATE_LINKED)
+ {
+ try
+ {
+ _Jv_Linker::wait_for_state(this, JV_STATE_LINKED);
+ }
+ catch (java::lang::Throwable *x)
+ {
+ // Turn into a NoClassDefFoundError.
+ java::lang::NoClassDefFoundError *result
+ = new java::lang::NoClassDefFoundError(getName());
+ result->initCause(x);
+ throw result;
+ }
+ }
- // Step 2.
- java::lang::Thread *self = java::lang::Thread::currentThread();
- // FIXME: `self' can be null at startup. Hence this nasty trick.
- self = (java::lang::Thread *) ((long) self | 1);
- while (state == JV_STATE_IN_PROGRESS && thread && thread != self)
- wait ();
+ // Step 2.
+ java::lang::Thread *self = java::lang::Thread::currentThread();
+ self = (java::lang::Thread *) ((long) self | 1);
+ while (state == JV_STATE_IN_PROGRESS && thread && thread != self)
+ wait ();
- // Steps 3 & 4.
- if (state == JV_STATE_DONE)
- {
- _Jv_MonitorExit (this);
+ // Steps 3 & 4.
+ if (state == JV_STATE_DONE || state == JV_STATE_IN_PROGRESS)
return;
- }
- if (state == JV_STATE_IN_PROGRESS)
- {
- _Jv_MonitorExit (this);
- /* Initialization in progress. The class is linked now,
- so ensure internal tables are built. */
- _Jv_PrepareConstantTimeTables (this);
- _Jv_MakeVTable(this);
- _Jv_LinkSymbolTable(this);
-
- return;
- }
-
- // Step 5.
- if (state == JV_STATE_ERROR)
- {
- _Jv_MonitorExit (this);
+ // Step 5.
+ if (state == JV_STATE_ERROR)
throw new java::lang::NoClassDefFoundError (getName());
- }
- // Step 6.
- thread = self;
- state = JV_STATE_IN_PROGRESS;
- _Jv_MonitorExit (this);
+ // Step 6.
+ thread = self;
+ _Jv_Linker::wait_for_state (this, JV_STATE_LINKED);
+ state = JV_STATE_IN_PROGRESS;
+ }
// Step 7.
if (! isInterface () && superclass)
catch (java::lang::Throwable *except)
{
// Caught an exception.
- _Jv_MonitorEnter (this);
+ JvSynchronize sync (this);
state = JV_STATE_ERROR;
notifyAll ();
- _Jv_MonitorExit (this);
throw except;
}
}
- _Jv_PrepareConstantTimeTables (this);
-
- if (vtable == NULL)
- _Jv_MakeVTable(this);
-
- if (otable || atable)
- _Jv_LinkSymbolTable(this);
-
// Steps 8, 9, 10, 11.
try
{
except = t;
}
}
- _Jv_MonitorEnter (this);
+
+ JvSynchronize sync (this);
state = JV_STATE_ERROR;
notifyAll ();
- _Jv_MonitorExit (this);
throw except;
}
- _Jv_MonitorEnter (this);
+ JvSynchronize sync (this);
state = JV_STATE_DONE;
notifyAll ();
- _Jv_MonitorExit (this);
+}
+
+// Only used by serialization
+java::lang::reflect::Field *
+java::lang::Class::getPrivateField (jstring name)
+{
+ int hash = name->hashCode ();
+
+ java::lang::reflect::Field* rfield;
+ for (int i = 0; i < field_count; i++)
+ {
+ _Jv_Field *field = &fields[i];
+ if (! _Jv_equal (field->name, name, hash))
+ continue;
+ rfield = new java::lang::reflect::Field ();
+ rfield->offset = (char*) field - (char*) fields;
+ rfield->declaringClass = this;
+ rfield->name = name;
+ return rfield;
+ }
+ jclass superclass = getSuperclass();
+ if (superclass == NULL)
+ return NULL;
+ rfield = superclass->getPrivateField(name);
+ for (int i = 0; i < interface_count && rfield == NULL; ++i)
+ rfield = interfaces[i]->getPrivateField (name);
+ return rfield;
+}
+
+// Only used by serialization
+java::lang::reflect::Method *
+java::lang::Class::getPrivateMethod (jstring name, JArray<jclass> *param_types)
+{
+ jstring partial_sig = getSignature (param_types, false);
+ jint p_len = partial_sig->length();
+ _Jv_Utf8Const *utf_name = _Jv_makeUtf8Const (name);
+ for (Class *klass = this; klass; klass = klass->getSuperclass())
+ {
+ int i = klass->isPrimitive () ? 0 : klass->method_count;
+ while (--i >= 0)
+ {
+ if (_Jv_equalUtf8Consts (klass->methods[i].name, utf_name)
+ && _Jv_equaln (klass->methods[i].signature, partial_sig, p_len))
+ {
+ // Found it.
+ using namespace java::lang::reflect;
+
+ Method *rmethod = new Method ();
+ rmethod->offset = ((char *) (&klass->methods[i])
+ - (char *) klass->methods);
+ rmethod->declaringClass = klass;
+ return rmethod;
+ }
+ }
+ }
+ throw new java::lang::NoSuchMethodException (name);
+}
+
+// Private accessor method for Java code to retrieve the protection domain.
+java::security::ProtectionDomain *
+java::lang::Class::getProtectionDomain0 ()
+{
+ return protectionDomain;
+}
+
+JArray<jobject> *
+java::lang::Class::getSigners()
+{
+ return hack_signers;
+}
+
+void
+java::lang::Class::setSigners(JArray<jobject> *s)
+{
+ hack_signers = s;
}
\f
_Jv_Method *
_Jv_LookupDeclaredMethod (jclass klass, _Jv_Utf8Const *name,
- _Jv_Utf8Const *signature)
+ _Jv_Utf8Const *signature,
+ jclass *declarer_result)
{
for (; klass; klass = klass->getSuperclass())
{
_Jv_Method *meth = _Jv_GetMethodLocal (klass, name, signature);
if (meth)
- return meth;
+ {
+ if (declarer_result)
+ *declarer_result = klass;
+ return meth;
+ }
}
return NULL;
}
+#ifdef HAVE_TLS
+
// NOTE: MCACHE_SIZE should be a power of 2 minus one.
-#define MCACHE_SIZE 1023
+#define MCACHE_SIZE 31
struct _Jv_mcache
{
_Jv_Method *method;
};
-static _Jv_mcache method_cache[MCACHE_SIZE + 1];
+static __thread _Jv_mcache *method_cache;
+#endif // HAVE_TLS
static void *
_Jv_FindMethodInCache (jclass klass,
_Jv_Utf8Const *name,
_Jv_Utf8Const *signature)
{
- int index = name->hash & MCACHE_SIZE;
- _Jv_mcache *mc = method_cache + index;
- _Jv_Method *m = mc->method;
-
- if (mc->klass == klass
- && m != NULL // thread safe check
- && _Jv_equalUtf8Consts (m->name, name)
- && _Jv_equalUtf8Consts (m->signature, signature))
- return mc->method->ncode;
+#ifdef HAVE_TLS
+ _Jv_mcache *cache = method_cache;
+ if (cache)
+ {
+ int index = name->hash16 () & MCACHE_SIZE;
+ _Jv_mcache *mc = &cache[index];
+ _Jv_Method *m = mc->method;
+
+ if (mc->klass == klass
+ && _Jv_equalUtf8Consts (m->name, name)
+ && _Jv_equalUtf8Consts (m->signature, signature))
+ return mc->method->ncode;
+ }
+#endif // HAVE_TLS
return NULL;
}
static void
-_Jv_AddMethodToCache (jclass klass,
- _Jv_Method *method)
+_Jv_AddMethodToCache (jclass klass, _Jv_Method *method)
{
- _Jv_MonitorEnter (&java::lang::Class::class$);
-
- int index = method->name->hash & MCACHE_SIZE;
-
- method_cache[index].method = method;
- method_cache[index].klass = klass;
+#ifdef HAVE_TLS
+ if (method_cache == NULL)
+ method_cache = (_Jv_mcache *) _Jv_MallocUnchecked((MCACHE_SIZE + 1)
+ * sizeof (_Jv_mcache));
+ // If the allocation failed, just keep going.
+ if (method_cache != NULL)
+ {
+ int index = method->name->hash16 () & MCACHE_SIZE;
+ method_cache[index].method = method;
+ method_cache[index].klass = klass;
+ }
+#endif // HAVE_TLS
+}
- _Jv_MonitorExit (&java::lang::Class::class$);
+// Free this thread's method cache. We explicitly manage this memory
+// as the GC does not yet know how to scan TLS on all platforms.
+void
+_Jv_FreeMethodCache ()
+{
+#ifdef HAVE_TLS
+ if (method_cache != NULL)
+ {
+ _Jv_Free(method_cache);
+ method_cache = NULL;
+ }
+#endif // HAVE_TLS
}
void *
if (Modifier::isStatic(meth->accflags))
throw new java::lang::IncompatibleClassChangeError
- (_Jv_GetMethodString (klass, meth->name));
+ (_Jv_GetMethodString (klass, meth));
if (Modifier::isAbstract(meth->accflags))
throw new java::lang::AbstractMethodError
- (_Jv_GetMethodString (klass, meth->name));
+ (_Jv_GetMethodString (klass, meth));
if (! Modifier::isPublic(meth->accflags))
throw new java::lang::IllegalAccessError
- (_Jv_GetMethodString (klass, meth->name));
+ (_Jv_GetMethodString (klass, meth));
_Jv_AddMethodToCache (klass, meth);
_Jv_LookupInterfaceMethodIdx (jclass klass, jclass iface, int method_idx)
{
_Jv_IDispatchTable *cldt = klass->idt;
- int idx = iface->idt->iface.ioffsets[cldt->cls.iindex] + method_idx;
- return cldt->cls.itable[idx];
+ int idx = iface->ioffsets[cldt->iindex] + method_idx;
+ return cldt->itable[idx];
}
jboolean
-_Jv_IsAssignableFrom (jclass target, jclass source)
+_Jv_IsAssignableFrom (jclass source, jclass target)
{
if (source == target)
return true;
// two interfaces for assignability.
if (__builtin_expect
(source->idt == NULL || source->isInterface(), false))
- return _Jv_InterfaceAssignableFrom (target, source);
+ return _Jv_InterfaceAssignableFrom (source, target);
_Jv_IDispatchTable *cl_idt = source->idt;
- _Jv_IDispatchTable *if_idt = target->idt;
- if (__builtin_expect ((if_idt == NULL), false))
+ if (__builtin_expect ((target->ioffsets == NULL), false))
return false; // No class implementing TARGET has been loaded.
- jshort cl_iindex = cl_idt->cls.iindex;
- if (cl_iindex < if_idt->iface.ioffsets[0])
+ jshort cl_iindex = cl_idt->iindex;
+ if (cl_iindex < target->ioffsets[0])
{
- jshort offset = if_idt->iface.ioffsets[cl_iindex];
- if (offset != -1 && offset < cl_idt->cls.itable_length
- && cl_idt->cls.itable[offset] == target)
+ jshort offset = target->ioffsets[cl_iindex];
+ if (offset != -1 && offset < cl_idt->itable_length
+ && cl_idt->itable[offset] == target)
return true;
}
return false;
// superinterface of SOURCE. This is used when SOURCE is also an interface,
// or a class with no interface dispatch table.
jboolean
-_Jv_InterfaceAssignableFrom (jclass iface, jclass source)
+_Jv_InterfaceAssignableFrom (jclass source, jclass iface)
{
for (int i = 0; i < source->interface_count; i++)
{
jclass interface = source->interfaces[i];
if (iface == interface
- || _Jv_InterfaceAssignableFrom (iface, interface))
+ || _Jv_InterfaceAssignableFrom (interface, iface))
return true;
}
if (!source->isInterface()
&& source->superclass
- && _Jv_InterfaceAssignableFrom (iface, source->superclass))
+ && _Jv_InterfaceAssignableFrom (source->superclass, iface))
return true;
return false;
{
if (__builtin_expect (!obj, false))
return false;
- return (_Jv_IsAssignableFrom (cl, JV_CLASS (obj)));
+ return _Jv_IsAssignableFrom (JV_CLASS (obj), cl);
}
void *
_Jv_CheckCast (jclass c, jobject obj)
{
if (__builtin_expect
- (obj != NULL && ! _Jv_IsAssignableFrom(c, JV_CLASS (obj)), false))
+ (obj != NULL && ! _Jv_IsAssignableFrom(JV_CLASS (obj), c), false))
throw new java::lang::ClassCastException
((new java::lang::StringBuffer
(obj->getClass()->getName()))->append
return;
jclass obj_class = JV_CLASS (obj);
if (__builtin_expect
- (! _Jv_IsAssignableFrom (elt_class, obj_class), false))
+ (! _Jv_IsAssignableFrom (obj_class, elt_class), false))
throw new java::lang::ArrayStoreException
((new java::lang::StringBuffer
(JvNewStringUTF("Cannot store ")))->append
}
}
-#define INITIAL_IOFFSETS_LEN 4
-#define INITIAL_IFACES_LEN 4
-
-static _Jv_IDispatchTable null_idt = { {SHRT_MAX, 0, NULL} };
-
-// Generate tables for constant-time assignment testing and interface
-// method lookup. This implements the technique described by Per Bothner
-// <per@bothner.com> on the java-discuss mailing list on 1999-09-02:
-// http://gcc.gnu.org/ml/java/1999-q3/msg00377.html
-void
-_Jv_PrepareConstantTimeTables (jclass klass)
-{
- if (klass->isPrimitive () || klass->isInterface ())
- return;
-
- // Short-circuit in case we've been called already.
- if ((klass->idt != NULL) || klass->depth != 0)
- return;
-
- // Calculate the class depth and ancestor table. The depth of a class
- // is how many "extends" it is removed from Object. Thus the depth of
- // java.lang.Object is 0, but the depth of java.io.FilterOutputStream
- // is 2. Depth is defined for all regular and array classes, but not
- // interfaces or primitive types.
-
- jclass klass0 = klass;
- jboolean has_interfaces = 0;
- while (klass0 != &java::lang::Object::class$)
- {
- has_interfaces += klass0->interface_count;
- klass0 = klass0->superclass;
- klass->depth++;
- }
-
- // We do class member testing in constant time by using a small table
- // of all the ancestor classes within each class. The first element is
- // a pointer to the current class, and the rest are pointers to the
- // classes ancestors, ordered from the current class down by decreasing
- // depth. We do not include java.lang.Object in the table of ancestors,
- // since it is redundant.
-
- klass->ancestors = (jclass *) _Jv_Malloc (klass->depth * sizeof (jclass));
- klass0 = klass;
- for (int index = 0; index < klass->depth; index++)
- {
- klass->ancestors[index] = klass0;
- klass0 = klass0->superclass;
- }
-
- if (java::lang::reflect::Modifier::isAbstract (klass->accflags))
- return;
-
- // Optimization: If class implements no interfaces, use a common
- // predefined interface table.
- if (!has_interfaces)
- {
- klass->idt = &null_idt;
- return;
- }
-
- klass->idt =
- (_Jv_IDispatchTable *) _Jv_Malloc (sizeof (_Jv_IDispatchTable));
-
- _Jv_ifaces ifaces;
-
- ifaces.count = 0;
- ifaces.len = INITIAL_IFACES_LEN;
- ifaces.list = (jclass *) _Jv_Malloc (ifaces.len * sizeof (jclass *));
-
- int itable_size = _Jv_GetInterfaces (klass, &ifaces);
-
- if (ifaces.count > 0)
- {
- klass->idt->cls.itable =
- (void **) _Jv_Malloc (itable_size * sizeof (void *));
- klass->idt->cls.itable_length = itable_size;
-
- jshort *itable_offsets =
- (jshort *) _Jv_Malloc (ifaces.count * sizeof (jshort));
-
- _Jv_GenerateITable (klass, &ifaces, itable_offsets);
-
- jshort cls_iindex =
- _Jv_FindIIndex (ifaces.list, itable_offsets, ifaces.count);
-
- for (int i=0; i < ifaces.count; i++)
- {
- ifaces.list[i]->idt->iface.ioffsets[cls_iindex] =
- itable_offsets[i];
- }
-
- klass->idt->cls.iindex = cls_iindex;
-
- _Jv_Free (ifaces.list);
- _Jv_Free (itable_offsets);
- }
- else
- {
- klass->idt->cls.iindex = SHRT_MAX;
- }
-}
-
-// Return index of item in list, or -1 if item is not present.
-inline jshort
-_Jv_IndexOf (void *item, void **list, jshort list_len)
+jboolean
+_Jv_IsAssignableFromSlow (jclass source, jclass target)
{
- for (int i=0; i < list_len; i++)
+ // First, strip arrays.
+ while (target->isArray ())
{
- if (list[i] == item)
- return i;
+ // If target is array, source must be as well.
+ if (! source->isArray ())
+ return false;
+ target = target->getComponentType ();
+ source = source->getComponentType ();
}
- return -1;
-}
-
-// Find all unique interfaces directly or indirectly implemented by klass.
-// Returns the size of the interface dispatch table (itable) for klass, which
-// is the number of unique interfaces plus the total number of methods that
-// those interfaces declare. May extend ifaces if required.
-jshort
-_Jv_GetInterfaces (jclass klass, _Jv_ifaces *ifaces)
-{
- jshort result = 0;
-
- for (int i=0; i < klass->interface_count; i++)
- {
- jclass iface = klass->interfaces[i];
- /* Make sure interface is linked. */
- _Jv_WaitForState(iface, JV_STATE_LINKED);
+ // Quick success.
+ if (target == &java::lang::Object::class$)
+ return true;
- if (_Jv_IndexOf (iface, (void **) ifaces->list, ifaces->count) == -1)
- {
- if (ifaces->count + 1 >= ifaces->len)
- {
- /* Resize ifaces list */
- ifaces->len = ifaces->len * 2;
- ifaces->list = (jclass *) _Jv_Realloc (ifaces->list,
- ifaces->len * sizeof(jclass));
- }
- ifaces->list[ifaces->count] = iface;
- ifaces->count++;
+ // Ensure that the classes have their supers installed.
+ _Jv_Linker::wait_for_state (source, JV_STATE_LOADING);
+ _Jv_Linker::wait_for_state (target, JV_STATE_LOADING);
- result += _Jv_GetInterfaces (klass->interfaces[i], ifaces);
- }
- }
-
- if (klass->isInterface())
+ do
{
- result += klass->method_count + 1;
- }
- else
- {
- if (klass->superclass)
- {
- result += _Jv_GetInterfaces (klass->superclass, ifaces);
- }
+ if (source == target)
+ return true;
+
+ if (target->isPrimitive () || source->isPrimitive ())
+ return false;
+
+ if (target->isInterface ())
+ {
+ for (int i = 0; i < source->interface_count; ++i)
+ {
+ // We use a recursive call because we also need to
+ // check superinterfaces.
+ if (_Jv_IsAssignableFromSlow (source->getInterface (i), target))
+ return true;
+ }
+ }
+ source = source->getSuperclass ();
}
- return result;
-}
+ while (source != NULL);
-// Fill out itable in klass, resolving method declarations in each ifaces.
-// itable_offsets is filled out with the position of each iface in itable,
-// such that itable[itable_offsets[n]] == ifaces.list[n].
-void
-_Jv_GenerateITable (jclass klass, _Jv_ifaces *ifaces, jshort *itable_offsets)
-{
- void **itable = klass->idt->cls.itable;
- jshort itable_pos = 0;
-
- for (int i=0; i < ifaces->count; i++)
- {
- jclass iface = ifaces->list[i];
- itable_offsets[i] = itable_pos;
- itable_pos = _Jv_AppendPartialITable (klass, iface, itable, itable_pos);
-
- /* Create interface dispatch table for iface */
- if (iface->idt == NULL)
- {
- iface->idt =
- (_Jv_IDispatchTable *) _Jv_Malloc (sizeof (_Jv_IDispatchTable));
-
- // The first element of ioffsets is its length (itself included).
- jshort *ioffsets =
- (jshort *) _Jv_Malloc (INITIAL_IOFFSETS_LEN * sizeof (jshort));
- ioffsets[0] = INITIAL_IOFFSETS_LEN;
- for (int i=1; i < INITIAL_IOFFSETS_LEN; i++)
- ioffsets[i] = -1;
-
- iface->idt->iface.ioffsets = ioffsets;
- }
- }
-}
-
-// Format method name for use in error messages.
-jstring
-_Jv_GetMethodString (jclass klass, _Jv_Utf8Const *name)
-{
- jstring r = JvNewStringUTF (klass->name->data);
- r = r->concat (JvNewStringUTF ("."));
- r = r->concat (JvNewStringUTF (name->data));
- return r;
-}
-
-void
-_Jv_ThrowNoSuchMethodError ()
-{
- throw new java::lang::NoSuchMethodError;
+ return false;
}
-// Each superinterface of a class (i.e. each interface that the class
-// directly or indirectly implements) has a corresponding "Partial
-// Interface Dispatch Table" whose size is (number of methods + 1) words.
-// The first word is a pointer to the interface (i.e. the java.lang.Class
-// instance for that interface). The remaining words are pointers to the
-// actual methods that implement the methods declared in the interface,
-// in order of declaration.
+// Lookup an interface method by name. This is very similar to
+// purpose to _getMethod, but the interfaces are quite different. It
+// might be a good idea for _getMethod to call this function.
//
-// Append partial interface dispatch table for "iface" to "itable", at
-// position itable_pos.
-// Returns the offset at which the next partial ITable should be appended.
-jshort
-_Jv_AppendPartialITable (jclass klass, jclass iface, void **itable,
- jshort pos)
+// Return true of the method is found, with the class in FOUND_CLASS
+// and the index in INDEX.
+bool
+_Jv_getInterfaceMethod (jclass search_class, jclass &found_class, int &index,
+ const _Jv_Utf8Const *utf_name,
+ const _Jv_Utf8Const *utf_sig)
{
- using namespace java::lang::reflect;
-
- itable[pos++] = (void *) iface;
- _Jv_Method *meth;
-
- for (int j=0; j < iface->method_count; j++)
+ for (jclass klass = search_class; klass; klass = klass->getSuperclass())
{
- meth = NULL;
- for (jclass cl = klass; cl; cl = cl->getSuperclass())
- {
- meth = _Jv_GetMethodLocal (cl, iface->methods[j].name,
- iface->methods[j].signature);
-
- if (meth)
- break;
- }
-
- if (meth && (meth->name->data[0] == '<'))
+ // FIXME: Throw an exception?
+ if (!klass->isInterface ())
+ return false;
+
+ int max = klass->method_count;
+ int offset = 0;
+ for (int i = 0; i < max; ++i)
{
- // leave a placeholder in the itable for hidden init methods.
- itable[pos] = NULL;
- }
- else if (meth)
- {
- if (Modifier::isStatic(meth->accflags))
- throw new java::lang::IncompatibleClassChangeError
- (_Jv_GetMethodString (klass, meth->name));
- if (Modifier::isAbstract(meth->accflags))
- throw new java::lang::AbstractMethodError
- (_Jv_GetMethodString (klass, meth->name));
- if (! Modifier::isPublic(meth->accflags))
- throw new java::lang::IllegalAccessError
- (_Jv_GetMethodString (klass, meth->name));
-
- itable[pos] = meth->ncode;
- }
- else
- {
- // The method doesn't exist in klass. Binary compatibility rules
- // permit this, so we delay the error until runtime using a pointer
- // to a method which throws an exception.
- itable[pos] = (void *) _Jv_ThrowNoSuchMethodError;
- }
- pos++;
- }
-
- return pos;
-}
-
-static _Jv_Mutex_t iindex_mutex;
-static bool iindex_mutex_initialized = false;
-
-// We need to find the correct offset in the Class Interface Dispatch
-// Table for a given interface. Once we have that, invoking an interface
-// method just requires combining the Method's index in the interface
-// (known at compile time) to get the correct method. Doing a type test
-// (cast or instanceof) is the same problem: Once we have a possible Partial
-// Interface Dispatch Table, we just compare the first element to see if it
-// matches the desired interface. So how can we find the correct offset?
-// Our solution is to keep a vector of candiate offsets in each interface
-// (idt->iface.ioffsets), and in each class we have an index
-// (idt->cls.iindex) used to select the correct offset from ioffsets.
-//
-// Calculate and return iindex for a new class.
-// ifaces is a vector of num interfaces that the class implements.
-// offsets[j] is the offset in the interface dispatch table for the
-// interface corresponding to ifaces[j].
-// May extend the interface ioffsets if required.
-jshort
-_Jv_FindIIndex (jclass *ifaces, jshort *offsets, jshort num)
-{
- int i;
- int j;
-
- // Acquire a global lock to prevent itable corruption in case of multiple
- // classes that implement an intersecting set of interfaces being linked
- // simultaneously. We can assume that the mutex will be initialized
- // single-threaded.
- if (! iindex_mutex_initialized)
- {
- _Jv_MutexInit (&iindex_mutex);
- iindex_mutex_initialized = true;
- }
-
- _Jv_MutexLock (&iindex_mutex);
-
- for (i=1;; i++) /* each potential position in ioffsets */
- {
- for (j=0;; j++) /* each iface */
- {
- if (j >= num)
- goto found;
- if (i >= ifaces[j]->idt->iface.ioffsets[0])
+ // Skip <clinit> here, as it will not be in the IDT.
+ if (klass->methods[i].name->first() == '<')
continue;
- int ioffset = ifaces[j]->idt->iface.ioffsets[i];
- /* We can potentially share this position with another class. */
- if (ioffset >= 0 && ioffset != offsets[j])
- break; /* Nope. Try next i. */
- }
- }
- found:
- for (j = 0; j < num; j++)
- {
- int len = ifaces[j]->idt->iface.ioffsets[0];
- if (i >= len)
- {
- /* Resize ioffsets. */
- int newlen = 2 * len;
- if (i >= newlen)
- newlen = i + 3;
- jshort *old_ioffsets = ifaces[j]->idt->iface.ioffsets;
- jshort *new_ioffsets = (jshort *) _Jv_Realloc (old_ioffsets,
- newlen * sizeof(jshort));
- new_ioffsets[0] = newlen;
-
- while (len < newlen)
- new_ioffsets[len++] = -1;
-
- ifaces[j]->idt->iface.ioffsets = new_ioffsets;
- }
- ifaces[j]->idt->iface.ioffsets[i] = offsets[j];
- }
-
- _Jv_MutexUnlock (&iindex_mutex);
-
- return i;
-}
-
-// Only used by serialization
-java::lang::reflect::Field *
-java::lang::Class::getPrivateField (jstring name)
-{
- int hash = name->hashCode ();
-
- java::lang::reflect::Field* rfield;
- for (int i = 0; i < field_count; i++)
- {
- _Jv_Field *field = &fields[i];
- if (! _Jv_equal (field->name, name, hash))
- continue;
- rfield = new java::lang::reflect::Field ();
- rfield->offset = (char*) field - (char*) fields;
- rfield->declaringClass = this;
- rfield->name = name;
- return rfield;
- }
- jclass superclass = getSuperclass();
- if (superclass == NULL)
- return NULL;
- rfield = superclass->getPrivateField(name);
- for (int i = 0; i < interface_count && rfield == NULL; ++i)
- rfield = interfaces[i]->getPrivateField (name);
- return rfield;
-}
-// Only used by serialization
-java::lang::reflect::Method *
-java::lang::Class::getPrivateMethod (jstring name, JArray<jclass> *param_types)
-{
- jstring partial_sig = getSignature (param_types, false);
- jint p_len = partial_sig->length();
- _Jv_Utf8Const *utf_name = _Jv_makeUtf8Const (name);
- for (Class *klass = this; klass; klass = klass->getSuperclass())
- {
- int i = klass->isPrimitive () ? 0 : klass->method_count;
- while (--i >= 0)
- {
if (_Jv_equalUtf8Consts (klass->methods[i].name, utf_name)
- && _Jv_equaln (klass->methods[i].signature, partial_sig, p_len))
+ && _Jv_equalUtf8Consts (klass->methods[i].signature, utf_sig))
{
// Found it.
using namespace java::lang::reflect;
- Method *rmethod = new Method ();
- rmethod->offset = ((char *) (&klass->methods[i])
- - (char *) klass->methods);
- rmethod->declaringClass = klass;
- return rmethod;
- }
- }
- }
- throw new java::lang::NoSuchMethodException (name);
-}
-
-// Private accessor method for Java code to retrieve the protection domain.
-java::security::ProtectionDomain *
-java::lang::Class::getProtectionDomain0 ()
-{
- return protectionDomain;
-}
-
-JArray<jobject> *
-java::lang::Class::getSigners()
-{
- return signers;
-}
-
-void
-java::lang::Class::setSigners(JArray<jobject> *s)
-{
- signers = s;
-}
-
-// Functions for indirect dispatch (symbolic virtual binding) support.
-
-// There are two tables, atable and otable. atable is an array of
-// addresses, and otable is an array of offsets, and these are used
-// for static and virtual members respectively.
-
-// {a,o}table_syms is an array of _Jv_MethodSymbols. Each such symbol
-// is a tuple of {classname, member name, signature}.
-// _Jv_LinkSymbolTable() scans these two arrays and fills in the
-// corresponding atable and otable with the addresses of static
-// members and the offsets of virtual members.
-
-// The offset (in bytes) for each resolved method or field is placed
-// at the corresponding position in the virtual method offset table
-// (klass->otable).
-
-// The same otable and atable may be shared by many classes.
-
-void
-_Jv_LinkSymbolTable(jclass klass)
-{
- //// FIXME: Need to lock the tables ////
-
- int index = 0;
- _Jv_MethodSymbol sym;
- if (klass->otable == NULL
- || klass->otable->state != 0)
- goto atable;
-
- klass->otable->state = 1;
-
- for (index = 0; sym = klass->otable_syms[index], sym.name != NULL; index++)
- {
- jclass target_class = _Jv_FindClass (sym.class_name, NULL);
- _Jv_Method *meth = NULL;
-
- const _Jv_Utf8Const *signature = sym.signature;
-
- // FIXME: This should be special index for ThrowNoSuchMethod().
- klass->otable->offsets[index] = -1;
-
- if (target_class == NULL)
- continue;
-
- if (target_class->isInterface())
- {
- // FIXME: This does not yet fully conform to binary compatibility
- // rules. It will break if a declaration is moved into a
- // superinterface.
- for (jclass cls = target_class; cls != 0; cls = cls->getSuperclass ())
- {
- for (int i=0; i < cls->method_count; i++)
- {
- meth = &cls->methods[i];
- if (_Jv_equalUtf8Consts (sym.name, meth->name)
- && _Jv_equalUtf8Consts (signature, meth->signature))
- {
- klass->otable->offsets[index] = i + 1;
- goto found;
- }
- }
-
- }
- found:
- continue;
- }
+ // FIXME: Method must be public. Throw an exception?
+ if (! Modifier::isPublic (klass->methods[i].accflags))
+ break;
- // We're looking for a field or a method, and we can tell
- // which is needed by looking at the signature.
- if (signature->length >= 2
- && signature->data[0] == '(')
- {
- // If the target class does not have a vtable_method_count yet,
- // then we can't tell the offsets for its methods, so we must lay
- // it out now.
- if (target_class->vtable_method_count == -1)
- {
- JvSynchronize sync (target_class);
- _Jv_LayoutVTableMethods (target_class);
- }
-
- meth = _Jv_LookupDeclaredMethod(target_class, sym.name,
- sym.signature);
-
- if (meth != NULL)
- {
- klass->otable->offsets[index] =
- _Jv_VTable::idx_to_offset (meth->index);
+ found_class = klass;
+ // Interface method indexes count from 1.
+ index = offset + 1;
+ return true;
}
- continue;
+ ++offset;
}
-
- // try fields
- {
- _Jv_Field *the_field = NULL;
-
- for (jclass cls = target_class; cls != 0; cls = cls->getSuperclass ())
- {
- for (int i = 0; i < cls->field_count; i++)
- {
- _Jv_Field *field = &cls->fields[i];
- if (! _Jv_equalUtf8Consts (field->name, sym.name))
- continue;
-
- // FIXME: What access checks should we perform here?
-// if (_Jv_CheckAccess (klass, cls, field->flags))
-// {
-
- if (!field->isResolved ())
- _Jv_ResolveField (field, cls->loader);
-
-// if (field_type != 0 && field->type != field_type)
-// throw new java::lang::LinkageError
-// (JvNewStringLatin1
-// ("field type mismatch with different loaders"));
-
- the_field = field;
- goto end_of_field_search;
- }
- }
- end_of_field_search:
- if (the_field != NULL)
- {
- if (the_field->flags & 0x0008 /* Modifier::STATIC */)
- {
- throw new java::lang::IncompatibleClassChangeError;
- }
- else
- {
- klass->otable->offsets[index] = the_field->u.boffset;
- }
- }
- else
- {
- throw new java::lang::NoSuchFieldError
- (_Jv_NewStringUtf8Const (sym.name));
- }
- }
- }
-
- atable:
- if (klass->atable == NULL
- || klass->atable->state != 0)
- return;
-
- klass->atable->state = 1;
-
- for (index = 0; sym = klass->atable_syms[index], sym.name != NULL; index++)
- {
- jclass target_class = _Jv_FindClass (sym.class_name, NULL);
- _Jv_Method *meth = NULL;
- const _Jv_Utf8Const *signature = sym.signature;
-
- // ??? Setting this pointer to null will at least get us a
- // NullPointerException
- klass->atable->addresses[index] = NULL;
-
- if (target_class == NULL)
- continue;
-
- // We're looking for a static field or a static method, and we
- // can tell which is needed by looking at the signature.
- if (signature->length >= 2
- && signature->data[0] == '(')
- {
- // If the target class does not have a vtable_method_count yet,
- // then we can't tell the offsets for its methods, so we must lay
- // it out now.
- if (target_class->vtable_method_count == -1)
- {
- JvSynchronize sync (target_class);
- _Jv_LayoutVTableMethods (target_class);
- }
-
- meth = _Jv_LookupDeclaredMethod(target_class, sym.name,
- sym.signature);
-
- if (meth != NULL)
- klass->atable->addresses[index] = meth->ncode;
- else
- klass->atable->addresses[index] = (void *)_Jv_ThrowNoSuchMethodError;
-
- continue;
- }
-
- // try fields
- {
- _Jv_Field *the_field = NULL;
-
- for (jclass cls = target_class; cls != 0; cls = cls->getSuperclass ())
- {
- for (int i = 0; i < cls->field_count; i++)
- {
- _Jv_Field *field = &cls->fields[i];
- if (! _Jv_equalUtf8Consts (field->name, sym.name))
- continue;
-
- // FIXME: What access checks should we perform here?
-// if (_Jv_CheckAccess (klass, cls, field->flags))
-// {
-
- if (!field->isResolved ())
- _Jv_ResolveField (field, cls->loader);
-
-// if (field_type != 0 && field->type != field_type)
-// throw new java::lang::LinkageError
-// (JvNewStringLatin1
-// ("field type mismatch with different loaders"));
-
- the_field = field;
- goto end_of_static_field_search;
- }
- }
- end_of_static_field_search:
- if (the_field != NULL)
- {
- if (the_field->flags & 0x0008 /* Modifier::STATIC */)
- {
- klass->atable->addresses[index] = the_field->u.addr;
- }
- else
- {
- throw new java::lang::IncompatibleClassChangeError;
- }
- }
- else
- {
- throw new java::lang::NoSuchFieldError
- (_Jv_NewStringUtf8Const (sym.name));
- }
- }
- }
-}
-
-// Returns true if METH should get an entry in a VTable.
-static jboolean
-isVirtualMethod (_Jv_Method *meth)
-{
- using namespace java::lang::reflect;
- return (((meth->accflags & (Modifier::STATIC | Modifier::PRIVATE)) == 0)
- && meth->name->data[0] != '<');
-}
-
-// This is put in empty vtable slots.
-static void
-_Jv_abstractMethodError (void)
-{
- throw new java::lang::AbstractMethodError();
-}
-
-// Prepare virtual method declarations in KLASS, and any superclasses as
-// required, by determining their vtable index, setting method->index, and
-// finally setting the class's vtable_method_count. Must be called with the
-// lock for KLASS held.
-void
-_Jv_LayoutVTableMethods (jclass klass)
-{
- if (klass->vtable != NULL || klass->isInterface()
- || klass->vtable_method_count != -1)
- return;
-
- jclass superclass = klass->superclass;
-
- if (superclass != NULL && superclass->vtable_method_count == -1)
- {
- JvSynchronize sync (superclass);
- _Jv_LayoutVTableMethods (superclass);
}
- int index = (superclass == NULL ? 0 : superclass->vtable_method_count);
-
- for (int i = 0; i < klass->method_count; ++i)
+ // If we haven't found a match, and this class is an interface, then
+ // check all the superinterfaces.
+ if (search_class->isInterface())
{
- _Jv_Method *meth = &klass->methods[i];
- _Jv_Method *super_meth = NULL;
-
- if (! isVirtualMethod (meth))
- continue;
-
- if (superclass != NULL)
+ for (int i = 0; i < search_class->interface_count; ++i)
{
- super_meth = _Jv_LookupDeclaredMethod (superclass, meth->name,
- meth->signature);
+ using namespace java::lang::reflect;
+ bool found = _Jv_getInterfaceMethod (search_class->interfaces[i],
+ found_class, index,
+ utf_name, utf_sig);
+ if (found)
+ return true;
}
-
- if (super_meth)
- meth->index = super_meth->index;
- else if (! (meth->accflags & java::lang::reflect::Modifier::FINAL)
- && ! (klass->accflags & java::lang::reflect::Modifier::FINAL))
- meth->index = index++;
}
- klass->vtable_method_count = index;
+ return false;
}
-// Set entries in VTABLE for virtual methods declared in KLASS. If
-// KLASS has an immediate abstract parent, recursively do its methods
-// first. FLAGS is used to determine which slots we've actually set.
-void
-_Jv_SetVTableEntries (jclass klass, _Jv_VTable *vtable, jboolean *flags)
+#ifdef INTERPRETER
+_Jv_InterpMethod*
+_Jv_FindInterpreterMethod (jclass klass, jmethodID desired_method)
{
using namespace java::lang::reflect;
- jclass superclass = klass->getSuperclass();
+ _Jv_InterpClass* iclass
+ = reinterpret_cast<_Jv_InterpClass*> (klass->aux_info);
+ _Jv_MethodBase** imethods = _Jv_GetFirstMethod (iclass);
- if (superclass != NULL && (superclass->getModifiers() & Modifier::ABSTRACT))
- _Jv_SetVTableEntries (superclass, vtable, flags);
-
- for (int i = klass->method_count - 1; i >= 0; i--)
+ for (int i = 0; i < JvNumMethods (klass); ++i)
{
- _Jv_Method *meth = &klass->methods[i];
- if (meth->index == (_Jv_ushort) -1)
- continue;
- if ((meth->accflags & Modifier::ABSTRACT))
+ _Jv_MethodBase* imeth = imethods[i];
+ _Jv_ushort accflags = klass->methods[i].accflags;
+ if ((accflags & (Modifier::NATIVE | Modifier::ABSTRACT)) == 0)
{
- vtable->set_method(meth->index, (void *) &_Jv_abstractMethodError);
- flags[meth->index] = false;
- }
- else
- {
- vtable->set_method(meth->index, meth->ncode);
- flags[meth->index] = true;
+ _Jv_InterpMethod* im = reinterpret_cast<_Jv_InterpMethod*> (imeth);
+ if (im->get_method () == desired_method)
+ return im;
}
}
-}
-
-// Allocate and lay out the virtual method table for KLASS. This will also
-// cause vtables to be generated for any non-abstract superclasses, and
-// virtual method layout to occur for any abstract superclasses. Must be
-// called with monitor lock for KLASS held.
-void
-_Jv_MakeVTable (jclass klass)
-{
- using namespace java::lang::reflect;
-
- if (klass->vtable != NULL || klass->isInterface()
- || (klass->accflags & Modifier::ABSTRACT))
- return;
- // out before we can create a vtable.
- if (klass->vtable_method_count == -1)
- _Jv_LayoutVTableMethods (klass);
-
- // Allocate the new vtable.
- _Jv_VTable *vtable = _Jv_VTable::new_vtable (klass->vtable_method_count);
- klass->vtable = vtable;
-
- jboolean flags[klass->vtable_method_count];
- for (int i = 0; i < klass->vtable_method_count; ++i)
- flags[i] = false;
-
- // Copy the vtable of the closest non-abstract superclass.
- jclass superclass = klass->superclass;
- if (superclass != NULL)
- {
- while ((superclass->accflags & Modifier::ABSTRACT) != 0)
- superclass = superclass->superclass;
-
- if (superclass->vtable == NULL)
- {
- JvSynchronize sync (superclass);
- _Jv_MakeVTable (superclass);
- }
-
- for (int i = 0; i < superclass->vtable_method_count; ++i)
- {
- vtable->set_method (i, superclass->vtable->get_method (i));
- flags[i] = true;
- }
- }
-
- // Set the class pointer and GC descriptor.
- vtable->clas = klass;
- vtable->gc_descr = _Jv_BuildGCDescr (klass);
-
- // For each virtual declared in klass and any immediate abstract
- // superclasses, set new vtable entry or override an old one.
- _Jv_SetVTableEntries (klass, vtable, flags);
-
- // It is an error to have an abstract method in a concrete class.
- if (! (klass->accflags & Modifier::ABSTRACT))
- {
- for (int i = 0; i < klass->vtable_method_count; ++i)
- if (! flags[i])
- {
- using namespace java::lang;
- while (klass != NULL)
- {
- for (int j = 0; j < klass->method_count; ++j)
- {
- if (klass->methods[i].index == i)
- {
- StringBuffer *buf = new StringBuffer ();
- buf->append (_Jv_NewStringUtf8Const (klass->methods[i].name));
- buf->append ((jchar) ' ');
- buf->append (_Jv_NewStringUtf8Const (klass->methods[i].signature));
- throw new AbstractMethodError (buf->toString ());
- }
- }
- klass = klass->getSuperclass ();
- }
- // Couldn't find the name, which is weird.
- // But we still must throw the error.
- throw new AbstractMethodError ();
- }
- }
+ return NULL;
}
+#endif
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