truffle: src/share/vm/oops/klassVtable.cpp comparison

comparison src/share/vm/oops/klassVtable.cpp @ 6725:da91efe96a93

6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>

author	coleenp
date	Sat, 01 Sep 2012 13:25:18 -0400
parents	8ce625481709
children	d8ce2825b193

comparison

equal deleted inserted replaced

-:36d1d483d5d6
+:da91efe96a93
 /*
-* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 #include "gc_implementation/shared/markSweep.inline.hpp"
 #include "memory/gcLocker.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.inline.hpp"
 #include "oops/instanceKlass.hpp"
-#include "oops/klassOop.hpp"
 #include "oops/klassVtable.hpp"
-#include "oops/methodOop.hpp"
+#include "oops/method.hpp"
 #include "oops/objArrayOop.hpp"
 #include "oops/oop.inline.hpp"
 #include "prims/jvmtiRedefineClassesTrace.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/handles.inline.hpp"
 #include "utilities/copy.hpp"
-inline instanceKlass* klassVtable::ik() const {
+inline InstanceKlass* klassVtable::ik() const {
-Klass* k = _klass()->klass_part();
+Klass* k = _klass();
-assert(k->oop_is_instance(), "not an instanceKlass");
+assert(k->oop_is_instance(), "not an InstanceKlass");
-return (instanceKlass*)k;
+return (InstanceKlass*)k;
 }
 // this function computes the vtable size (including the size needed for miranda
 // methods) and the number of miranda methods in this class
 // the same name and signature as m), then m is a Miranda method which is
 // entered as a public abstract method in C's vtable.  From then on it should
 // treated as any other public method in C for method over-ride purposes.
 void klassVtable::compute_vtable_size_and_num_mirandas(int &vtable_length,
 int &num_miranda_methods,
-klassOop super,
+Klass* super,
-objArrayOop methods,
+Array<Method*>* methods,
 AccessFlags class_flags,
 Handle classloader,
 Symbol* classname,
-objArrayOop local_interfaces,
+Array<Klass*>* local_interfaces,
 TRAPS
 ) {
 No_Safepoint_Verifier nsv;
 // set up default result values
 vtable_length = 0;
 num_miranda_methods = 0;
 // start off with super's vtable length
-instanceKlass* sk = (instanceKlass*)super->klass_part();
+InstanceKlass* sk = (InstanceKlass*)super;
 vtable_length = super == NULL ? 0 : sk->vtable_length();
 // go thru each method in the methods table to see if it needs a new entry
 int len = methods->length();
 for (int i = 0; i < len; i++) {
-assert(methods->obj_at(i)->is_method(), "must be a methodOop");
+assert(methods->at(i)->is_method(), "must be a Method*");
-methodHandle mh(THREAD, methodOop(methods->obj_at(i)));
+methodHandle mh(THREAD, methods->at(i));
 if (needs_new_vtable_entry(mh, super, classloader, classname, class_flags, THREAD)) {
 vtable_length += vtableEntry::size(); // we need a new entry
 }
 }
 "bad vtable size for class Object");
 assert(vtable_length % vtableEntry::size() == 0, "bad vtable length");
 assert(vtable_length >= Universe::base_vtable_size(), "vtable too small");
 }
-int klassVtable::index_of(methodOop m, int len) const {
+int klassVtable::index_of(Method* m, int len) const {
 assert(m->vtable_index() >= 0, "do not ask this of non-vtable methods");
 return m->vtable_index();
 }
 int klassVtable::initialize_from_super(KlassHandle super) {
 if (super.is_null()) {
 return 0;
 } else {
 // copy methods from superKlass
-// can't inherit from array class, so must be instanceKlass
+// can't inherit from array class, so must be InstanceKlass
 assert(super->oop_is_instance(), "must be instance klass");
-instanceKlass* sk = (instanceKlass*)super()->klass_part();
+InstanceKlass* sk = (InstanceKlass*)super();
 klassVtable* superVtable = sk->vtable();
 assert(superVtable->length() <= _length, "vtable too short");
 #ifdef ASSERT
 superVtable->verify(tty, true);
 #endif
 int super_vtable_len = initialize_from_super(super);
 if (klass()->oop_is_array()) {
 assert(super_vtable_len == _length, "arrays shouldn't introduce new methods");
 } else {
-assert(_klass->oop_is_instance(), "must be instanceKlass");
+assert(_klass->oop_is_instance(), "must be InstanceKlass");
-objArrayHandle methods(THREAD, ik()->methods());
+Array<Method*>* methods = ik()->methods();
-int len = methods()->length();
+int len = methods->length();
 int initialized = super_vtable_len;
 // update_inherited_vtable can stop for gc - ensure using handles
 for (int i = 0; i < len; i++) {
 HandleMark hm(THREAD);
-assert(methods()->obj_at(i)->is_method(), "must be a methodOop");
+assert(methods->at(i)->is_method(), "must be a Method*");
-methodHandle mh(THREAD, (methodOop)methods()->obj_at(i));
+methodHandle mh(THREAD, methods->at(i));
 bool needs_new_entry = update_inherited_vtable(ik(), mh, super_vtable_len, checkconstraints, CHECK);
 if (needs_new_entry) {
 put_method_at(mh(), initialized);
 // Called for cases where a method does not override its superclass' vtable entry
 // For bytecodes not produced by javac together it is possible that a method does not override
 // the superclass's method, but might indirectly override a super-super class's vtable entry
 // If none found, return a null superk, else return the superk of the method this does override
-instanceKlass* klassVtable::find_transitive_override(instanceKlass* initialsuper, methodHandle target_method,
+InstanceKlass* klassVtable::find_transitive_override(InstanceKlass* initialsuper, methodHandle target_method,
 int vtable_index, Handle target_loader, Symbol* target_classname, Thread * THREAD) {
-instanceKlass* superk = initialsuper;
+InstanceKlass* superk = initialsuper;
 while (superk != NULL && superk->super() != NULL) {
-instanceKlass* supersuperklass = instanceKlass::cast(superk->super());
+InstanceKlass* supersuperklass = InstanceKlass::cast(superk->super());
 klassVtable* ssVtable = supersuperklass->vtable();
 if (vtable_index < ssVtable->length()) {
-methodOop super_method = ssVtable->method_at(vtable_index);
+Method* super_method = ssVtable->method_at(vtable_index);
 #ifndef PRODUCT
 Symbol* name= target_method()->name();
 Symbol* signature = target_method()->signature();
 assert(super_method->name() == name && super_method->signature() == signature, "vtable entry name/sig mismatch");
 #endif
 #endif /*PRODUCT*/
 break; // return found superk
 }
 } else  {
 // super class has no vtable entry here, stop transitive search
-superk = (instanceKlass*)NULL;
+superk = (InstanceKlass*)NULL;
 break;
 }
 // if no override found yet, continue to search up
-superk = instanceKlass::cast(superk->super());
+superk = InstanceKlass::cast(superk->super());
 }
 return superk;
 }
 // Update child's copy of super vtable for overrides
 // OR return true if a new vtable entry is required
-// Only called for instanceKlass's, i.e. not for arrays
+// Only called for InstanceKlass's, i.e. not for arrays
 // If that changed, could not use _klass as handle for klass
-bool klassVtable::update_inherited_vtable(instanceKlass* klass, methodHandle target_method, int super_vtable_len,
+bool klassVtable::update_inherited_vtable(InstanceKlass* klass, methodHandle target_method, int super_vtable_len,
 bool checkconstraints, TRAPS) {
 ResourceMark rm;
 bool allocate_new = true;
-assert(klass->oop_is_instance(), "must be instanceKlass");
+assert(klass->oop_is_instance(), "must be InstanceKlass");
 // Initialize the method's vtable index to "nonvirtual".
 // If we allocate a vtable entry, we will update it to a non-negative number.
-target_method()->set_vtable_index(methodOopDesc::nonvirtual_vtable_index);
+target_method()->set_vtable_index(Method::nonvirtual_vtable_index);
 // Static and <init> methods are never in
 if (target_method()->is_static() || target_method()->name() ==  vmSymbols::object_initializer_name()) {
 return false;
 }
 // which can block for gc, once we are in this loop, use handles
 // For classfiles built with >= jdk7, we now look for transitive overrides
 Symbol* name = target_method()->name();
 Symbol* signature = target_method()->signature();
-Handle target_loader(THREAD, _klass->class_loader());
+Handle target_loader(THREAD, _klass()->class_loader());
 Symbol*  target_classname = _klass->name();
 for(int i = 0; i < super_vtable_len; i++) {
-methodOop super_method = method_at(i);
+Method* super_method = method_at(i);
 // Check if method name matches
 if (super_method->name() == name && super_method->signature() == signature) {
 // get super_klass for method_holder for the found method
-instanceKlass* super_klass =  instanceKlass::cast(super_method->method_holder());
+InstanceKlass* super_klass =  InstanceKlass::cast(super_method->method_holder());
 if ((super_klass->is_override(super_method, target_loader, target_classname, THREAD)) ||
 ((klass->major_version() >= VTABLE_TRANSITIVE_OVERRIDE_VERSION)
 && ((super_klass = find_transitive_override(super_klass, target_method, i, target_loader,
-target_classname, THREAD)) != (instanceKlass*)NULL))) {
+target_classname, THREAD)) != (InstanceKlass*)NULL))) {
 // overriding, so no new entry
 allocate_new = false;
 if (checkconstraints) {
 // Override vtable entry if passes loader constraint check
 }
 }
 return allocate_new;
 }
-void klassVtable::put_method_at(methodOop m, int index) {
+void klassVtable::put_method_at(Method* m, int index) {
-assert(m->is_oop_or_null(), "Not an oop or null");
 #ifndef PRODUCT
 if (PrintVtables && Verbose) {
 ResourceMark rm;
 tty->print_cr("adding %s::%s at index %d", _klass->internal_name(),
 (m != NULL) ? m->name()->as_C_string() : "<NULL>", index);
 }
-assert(unchecked_method_at(index)->is_oop_or_null(), "Not an oop or null");
 #endif
 table()[index].set(m);
 }
 // Find out if a method "m" with superclass "super", loader "classloader" and
 // name "classname" needs a new vtable entry.  Let P be a class package defined
 // by "classloader" and "classname".
 // NOTE: The logic used here is very similar to the one used for computing
 // the vtables indices for a method. We cannot directly use that function because,
-// we allocate the instanceKlass at load time, and that requires that the
+// we allocate the InstanceKlass at load time, and that requires that the
 // superclass has been loaded.
 // However, the vtable entries are filled in at link time, and therefore
 // the superclass' vtable may not yet have been filled in.
 bool klassVtable::needs_new_vtable_entry(methodHandle target_method,
-klassOop super,
+Klass* super,
 Handle classloader,
 Symbol* classname,
 AccessFlags class_flags,
 TRAPS) {
 if ((class_flags.is_final() || target_method()->is_final()) ||
 // search through the super class hierarchy to see if we need
 // a new entry
 ResourceMark rm;
 Symbol* name = target_method()->name();
 Symbol* signature = target_method()->signature();
-klassOop k = super;
+Klass* k = super;
-methodOop super_method = NULL;
+Method* super_method = NULL;
-instanceKlass *holder = NULL;
+InstanceKlass *holder = NULL;
-methodOop recheck_method =  NULL;
+Method* recheck_method =  NULL;
 while (k != NULL) {
 // lookup through the hierarchy for a method with matching name and sign.
-super_method = instanceKlass::cast(k)->lookup_method(name, signature);
+super_method = InstanceKlass::cast(k)->lookup_method(name, signature);
 if (super_method == NULL) {
 break; // we still have to search for a matching miranda method
 }
 // get the class holding the matching method
 // make sure you use that class for is_override
-instanceKlass* superk = instanceKlass::cast(super_method->method_holder());
+InstanceKlass* superk = InstanceKlass::cast(super_method->method_holder());
 // we want only instance method matches
 // pretend private methods are not in the super vtable
 // since we do override around them: e.g. a.m pub/b.m private/c.m pub,
 // ignore private, c.m pub does override a.m pub
 // For classes that were not javac'd together, we also do transitive overriding around
 // if the target method is public or protected it may have a matching
 // miranda method in the super, whose entry it should re-use.
 // Actually, to handle cases that javac would not generate, we need
 // this check for all access permissions.
-instanceKlass *sk = instanceKlass::cast(super);
+InstanceKlass *sk = InstanceKlass::cast(super);
 if (sk->has_miranda_methods()) {
 if (sk->lookup_method_in_all_interfaces(name, signature) != NULL) {
 return false;  // found a matching miranda; we do not need a new entry
 }
 }
 // get the vtable index of a miranda method with matching "name" and "signature"
 int klassVtable::index_of_miranda(Symbol* name, Symbol* signature) {
 // search from the bottom, might be faster
 for (int i = (length() - 1); i >= 0; i--) {
-methodOop m = table()[i].method();
+Method* m = table()[i].method();
 if (is_miranda_entry_at(i) &&
 m->name() == name && m->signature() == signature) {
 return i;
 }
 }
-return methodOopDesc::invalid_vtable_index;
+return Method::invalid_vtable_index;
 }
 // check if an entry is miranda
 bool klassVtable::is_miranda_entry_at(int i) {
-methodOop m = method_at(i);
+Method* m = method_at(i);
-klassOop method_holder = m->method_holder();
+Klass* method_holder = m->method_holder();
-instanceKlass *mhk = instanceKlass::cast(method_holder);
+InstanceKlass *mhk = InstanceKlass::cast(method_holder);
 // miranda methods are interface methods in a class's vtable
 if (mhk->is_interface()) {
 assert(m->is_public() && m->is_abstract(), "should be public and abstract");
 assert(ik()->implements_interface(method_holder) , "this class should implement the interface");
 return false;
 }
 // check if a method is a miranda method, given a class's methods table and it's super
 // the caller must make sure that the method belongs to an interface implemented by the class
-bool klassVtable::is_miranda(methodOop m, objArrayOop class_methods, klassOop super) {
+bool klassVtable::is_miranda(Method* m, Array<Method*>* class_methods, Klass* super) {
 Symbol* name = m->name();
 Symbol* signature = m->signature();
-if (instanceKlass::find_method(class_methods, name, signature) == NULL) {
+if (InstanceKlass::find_method(class_methods, name, signature) == NULL) {
 // did not find it in the method table of the current class
 if (super == NULL) {
 // super doesn't exist
 return true;
 }
-methodOop mo = instanceKlass::cast(super)->lookup_method(name, signature);
+Method* mo = InstanceKlass::cast(super)->lookup_method(name, signature);
 if (mo == NULL || mo->access_flags().is_private() ) {
 // super class hierarchy does not implement it or protection is different
 return true;
 }
 }
 return false;
 }
-void klassVtable::add_new_mirandas_to_list(GrowableArray<methodOop>* list_of_current_mirandas,
+void klassVtable::add_new_mirandas_to_list(GrowableArray<Method*>* list_of_current_mirandas,
-objArrayOop current_interface_methods,
+Array<Method*>* current_interface_methods,
-objArrayOop class_methods,
+Array<Method*>* class_methods,
-klassOop super) {
+Klass* super) {
 // iterate thru the current interface's method to see if it a miranda
 int num_methods = current_interface_methods->length();
 for (int i = 0; i < num_methods; i++) {
-methodOop im = methodOop(current_interface_methods->obj_at(i));
+Method* im = current_interface_methods->at(i);
 bool is_duplicate = false;
 int num_of_current_mirandas = list_of_current_mirandas->length();
 // check for duplicate mirandas in different interfaces we implement
 for (int j = 0; j < num_of_current_mirandas; j++) {
-methodOop miranda = list_of_current_mirandas->at(j);
+Method* miranda = list_of_current_mirandas->at(j);
 if ((im->name() == miranda->name()) &&
 (im->signature() == miranda->signature())) {
 is_duplicate = true;
 break;
 }
 }
 if (!is_duplicate) { // we don't want duplicate miranda entries in the vtable
 if (is_miranda(im, class_methods, super)) { // is it a miranda at all?
-instanceKlass *sk = instanceKlass::cast(super);
+InstanceKlass *sk = InstanceKlass::cast(super);
 // check if it is a duplicate of a super's miranda
 if (sk->lookup_method_in_all_interfaces(im->name(), im->signature()) == NULL) {
 list_of_current_mirandas->append(im);
 }
 }
 }
 }
 }
-void klassVtable::get_mirandas(GrowableArray<methodOop>* mirandas,
+void klassVtable::get_mirandas(GrowableArray<Method*>* mirandas,
-klassOop super, objArrayOop class_methods,
+Klass* super, Array<Method*>* class_methods,
-objArrayOop local_interfaces) {
+Array<Klass*>* local_interfaces) {
 assert((mirandas->length() == 0) , "current mirandas must be 0");
 // iterate thru the local interfaces looking for a miranda
 int num_local_ifs = local_interfaces->length();
 for (int i = 0; i < num_local_ifs; i++) {
-instanceKlass *ik = instanceKlass::cast(klassOop(local_interfaces->obj_at(i)));
+InstanceKlass *ik = InstanceKlass::cast(local_interfaces->at(i));
 add_new_mirandas_to_list(mirandas, ik->methods(), class_methods, super);
 // iterate thru each local's super interfaces
-objArrayOop super_ifs = ik->transitive_interfaces();
+Array<Klass*>* super_ifs = ik->transitive_interfaces();
 int num_super_ifs = super_ifs->length();
 for (int j = 0; j < num_super_ifs; j++) {
-instanceKlass *sik = instanceKlass::cast(klassOop(super_ifs->obj_at(j)));
+InstanceKlass *sik = InstanceKlass::cast(super_ifs->at(j));
 add_new_mirandas_to_list(mirandas, sik->methods(), class_methods, super);
 }
 }
 }
 // get number of mirandas
-int klassVtable::get_num_mirandas(klassOop super, objArrayOop class_methods, objArrayOop local_interfaces) {
+int klassVtable::get_num_mirandas(Klass* super, Array<Method*>* class_methods, Array<Klass*>* local_interfaces) {
 ResourceMark rm;
-GrowableArray<methodOop>* mirandas = new GrowableArray<methodOop>(20);
+GrowableArray<Method*>* mirandas = new GrowableArray<Method*>(20);
 get_mirandas(mirandas, super, class_methods, local_interfaces);
 return mirandas->length();
 }
 // fill in mirandas
 void klassVtable::fill_in_mirandas(int& initialized) {
 ResourceMark rm;
-GrowableArray<methodOop>* mirandas = new GrowableArray<methodOop>(20);
+GrowableArray<Method*>* mirandas = new GrowableArray<Method*>(20);
-instanceKlass *this_ik = ik();
+InstanceKlass *this_ik = ik();
 get_mirandas(mirandas, this_ik->super(), this_ik->methods(), this_ik->local_interfaces());
 int num_mirandas = mirandas->length();
 for (int i = 0; i < num_mirandas; i++) {
 put_method_at(mirandas->at(i), initialized);
 initialized++;
 void klassVtable::copy_vtable_to(vtableEntry* start) {
 Copy::disjoint_words((HeapWord*)table(), (HeapWord*)start, _length * vtableEntry::size());
 }
-void klassVtable::adjust_method_entries(methodOop* old_methods, methodOop* new_methods,
+void klassVtable::adjust_method_entries(Method** old_methods, Method** new_methods,
 int methods_length, bool * trace_name_printed) {
 // search the vtable for uses of either obsolete or EMCP methods
 for (int j = 0; j < methods_length; j++) {
-methodOop old_method = old_methods[j];
+Method* old_method = old_methods[j];
-methodOop new_method = new_methods[j];
+Method* new_method = new_methods[j];
 // In the vast majority of cases we could get the vtable index
 // by using:  old_method->vtable_index()
 // However, there are rare cases, eg. sun.awt.X11.XDecoratedPeer.getX()
 // in sun.awt.X11.XFramePeer where methods occur more than once in the
 bool klassVtable::is_initialized() {
 return _length == 0 || table()[0].method() != NULL;
 }
-// Garbage collection
-void klassVtable::oop_follow_contents() {
-int len = length();
-for (int i = 0; i < len; i++) {
-MarkSweep::mark_and_push(adr_method_at(i));
-}
-}
-#ifndef SERIALGC
-void klassVtable::oop_follow_contents(ParCompactionManager* cm) {
-int len = length();
-for (int i = 0; i < len; i++) {
-PSParallelCompact::mark_and_push(cm, adr_method_at(i));
-}
-}
-#endif // SERIALGC
-void klassVtable::oop_adjust_pointers() {
-int len = length();
-for (int i = 0; i < len; i++) {
-MarkSweep::adjust_pointer(adr_method_at(i));
-}
-}
-#ifndef SERIALGC
-void klassVtable::oop_update_pointers(ParCompactionManager* cm) {
-const int n = length();
-for (int i = 0; i < n; i++) {
-PSParallelCompact::adjust_pointer(adr_method_at(i));
-}
-}
-#endif // SERIALGC
-// Iterators
-void klassVtable::oop_oop_iterate(OopClosure* blk) {
-int len = length();
-for (int i = 0; i < len; i++) {
-blk->do_oop(adr_method_at(i));
-}
-}
-void klassVtable::oop_oop_iterate_m(OopClosure* blk, MemRegion mr) {
-int len = length();
-int i;
-for (i = 0; i < len; i++) {
-if ((HeapWord*)adr_method_at(i) >= mr.start()) break;
-}
-for (; i < len; i++) {
-oop* adr = adr_method_at(i);
-if ((HeapWord*)adr < mr.end()) blk->do_oop(adr);
-}
-}
 //-----------------------------------------------------------------------------------------
 // Itable code
 // Initialize a itableMethodEntry
-void itableMethodEntry::initialize(methodOop m) {
+void itableMethodEntry::initialize(Method* m) {
 if (m == NULL) return;
 _method = m;
 }
 if (klass->itable_length() > 0) {
 itableOffsetEntry* offset_entry = (itableOffsetEntry*)klass->start_of_itable();
 if (offset_entry  != NULL && offset_entry->interface_klass() != NULL) { // Check that itable is initialized
 // First offset entry points to the first method_entry
-intptr_t* method_entry  = (intptr_t *)(((address)klass->as_klassOop()) + offset_entry->offset());
+intptr_t* method_entry  = (intptr_t *)(((address)klass()) + offset_entry->offset());
 intptr_t* end         = klass->end_of_itable();
-_table_offset      = (intptr_t*)offset_entry - (intptr_t*)klass->as_klassOop();
+_table_offset      = (intptr_t*)offset_entry - (intptr_t*)klass();
 _size_offset_table = (method_entry - ((intptr_t*)offset_entry)) / itableOffsetEntry::size();
 _size_method_table = (end - method_entry)                  / itableMethodEntry::size();
 assert(_table_offset >= 0 && _size_offset_table >= 0 && _size_method_table >= 0, "wrong computation");
 return;
 }
 // The length of the itable was either zero, or it has not yet been initialized.
 _table_offset      = 0;
 _size_offset_table = 0;
 _size_method_table = 0;
 }
-// Garbage Collection
-void klassItable::oop_follow_contents() {
-// offset table
-itableOffsetEntry* ioe = offset_entry(0);
-for(int i = 0; i < _size_offset_table; i++) {
-MarkSweep::mark_and_push((oop*)&ioe->_interface);
-ioe++;
-}
-// method table
-itableMethodEntry* ime = method_entry(0);
-for(int j = 0; j < _size_method_table; j++) {
-MarkSweep::mark_and_push((oop*)&ime->_method);
-ime++;
-}
-}
-#ifndef SERIALGC
-void klassItable::oop_follow_contents(ParCompactionManager* cm) {
-// offset table
-itableOffsetEntry* ioe = offset_entry(0);
-for(int i = 0; i < _size_offset_table; i++) {
-PSParallelCompact::mark_and_push(cm, (oop*)&ioe->_interface);
-ioe++;
-}
-// method table
-itableMethodEntry* ime = method_entry(0);
-for(int j = 0; j < _size_method_table; j++) {
-PSParallelCompact::mark_and_push(cm, (oop*)&ime->_method);
-ime++;
-}
-}
-#endif // SERIALGC
-void klassItable::oop_adjust_pointers() {
-// offset table
-itableOffsetEntry* ioe = offset_entry(0);
-for(int i = 0; i < _size_offset_table; i++) {
-MarkSweep::adjust_pointer((oop*)&ioe->_interface);
-ioe++;
-}
-// method table
-itableMethodEntry* ime = method_entry(0);
-for(int j = 0; j < _size_method_table; j++) {
-MarkSweep::adjust_pointer((oop*)&ime->_method);
-ime++;
-}
-}
-#ifndef SERIALGC
-void klassItable::oop_update_pointers(ParCompactionManager* cm) {
-// offset table
-itableOffsetEntry* ioe = offset_entry(0);
-for(int i = 0; i < _size_offset_table; i++) {
-PSParallelCompact::adjust_pointer((oop*)&ioe->_interface);
-ioe++;
-}
-// method table
-itableMethodEntry* ime = method_entry(0);
-for(int j = 0; j < _size_method_table; j++) {
-PSParallelCompact::adjust_pointer((oop*)&ime->_method);
-ime++;
-}
-}
-#endif // SERIALGC
-// Iterators
-void klassItable::oop_oop_iterate(OopClosure* blk) {
-// offset table
-itableOffsetEntry* ioe = offset_entry(0);
-for(int i = 0; i < _size_offset_table; i++) {
-blk->do_oop((oop*)&ioe->_interface);
-ioe++;
-}
-// method table
-itableMethodEntry* ime = method_entry(0);
-for(int j = 0; j < _size_method_table; j++) {
-blk->do_oop((oop*)&ime->_method);
-ime++;
-}
-}
-void klassItable::oop_oop_iterate_m(OopClosure* blk, MemRegion mr) {
-// offset table
-itableOffsetEntry* ioe = offset_entry(0);
-for(int i = 0; i < _size_offset_table; i++) {
-oop* adr = (oop*)&ioe->_interface;
-if (mr.contains(adr)) blk->do_oop(adr);
-ioe++;
-}
-// method table
-itableMethodEntry* ime = method_entry(0);
-for(int j = 0; j < _size_method_table; j++) {
-oop* adr = (oop*)&ime->_method;
-if (mr.contains(adr)) blk->do_oop(adr);
-ime++;
-}
-}
 static int initialize_count = 0;
 // Initialization
 void klassItable::initialize_itable(bool checkconstraints, TRAPS) {
 // Iterate through all interfaces
 int i;
 for(i = 0; i < num_interfaces; i++) {
 itableOffsetEntry* ioe = offset_entry(i);
+HandleMark hm(THREAD);
 KlassHandle interf_h (THREAD, ioe->interface_klass());
 assert(interf_h() != NULL && ioe->offset() != 0, "bad offset entry in itable");
 initialize_itable_for_interface(ioe->offset(), interf_h, checkconstraints, CHECK);
 }
 guarantee(ioe->interface_klass() == NULL && ioe->offset() == 0, "terminator entry missing");
 }
 void klassItable::initialize_itable_for_interface(int method_table_offset, KlassHandle interf_h, bool checkconstraints, TRAPS) {
-objArrayHandle methods(THREAD, instanceKlass::cast(interf_h())->methods());
+Array<Method*>* methods = InstanceKlass::cast(interf_h())->methods();
-int nof_methods = methods()->length();
+int nof_methods = methods->length();
 HandleMark hm;
 KlassHandle klass = _klass;
 assert(nof_methods > 0, "at least one method must exist for interface to be in vtable");
-Handle interface_loader (THREAD, instanceKlass::cast(interf_h())->class_loader());
+Handle interface_loader (THREAD, InstanceKlass::cast(interf_h())->class_loader());
 int ime_num = 0;
-// Skip first methodOop if it is a class initializer
+// Skip first Method* if it is a class initializer
-int i = ((methodOop)methods()->obj_at(0))->is_static_initializer() ? 1 : 0;
+int i = methods->at(0)->is_static_initializer() ? 1 : 0;
 // m, method_name, method_signature, klass reset each loop so they
 // don't need preserving across check_signature_loaders call
 // methods needs a handle in case of gc from check_signature_loaders
 for(; i < nof_methods; i++) {
-methodOop m = (methodOop)methods()->obj_at(i);
+Method* m = methods->at(i);
 Symbol* method_name = m->name();
 Symbol* method_signature = m->signature();
 // This is same code as in Linkresolver::lookup_instance_method_in_klasses
-methodOop target = klass->uncached_lookup_method(method_name, method_signature);
+Method* target = klass->uncached_lookup_method(method_name, method_signature);
 while (target != NULL && target->is_static()) {
 // continue with recursive lookup through the superclass
-klassOop super = Klass::cast(target->method_holder())->super();
+Klass* super = Klass::cast(target->method_holder())->super();
-target = (super == NULL) ? methodOop(NULL) : Klass::cast(super)->uncached_lookup_method(method_name, method_signature);
+target = (super == NULL) ? (Method*)NULL : Klass::cast(super)->uncached_lookup_method(method_name, method_signature);
 }
 if (target == NULL || !target->is_public() || target->is_abstract()) {
 // Entry do not resolve. Leave it empty
 } else {
 // Entry did resolve, check loader constraints before initializing
 // if checkconstraints requested
 methodHandle  target_h (THREAD, target); // preserve across gc
 if (checkconstraints) {
-Handle method_holder_loader (THREAD, instanceKlass::cast(target->method_holder())->class_loader());
+Handle method_holder_loader (THREAD, InstanceKlass::cast(target->method_holder())->class_loader());
 if (method_holder_loader() != interface_loader()) {
 ResourceMark rm(THREAD);
 char* failed_type_name =
 SystemDictionary::check_signature_loaders(method_signature,
 method_holder_loader,
 "used in the signature";
 char* sig = target_h()->name_and_sig_as_C_string();
 const char* loader1 = SystemDictionary::loader_name(method_holder_loader());
 char* current = klass->name()->as_C_string();
 const char* loader2 = SystemDictionary::loader_name(interface_loader());
-char* iface = instanceKlass::cast(interf_h())->name()->as_C_string();
+char* iface = InstanceKlass::cast(interf_h())->name()->as_C_string();
 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
 strlen(current) + strlen(loader2) + strlen(iface) +
 strlen(failed_type_name);
 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
 // Progress to next entry
 ime_num++;
 }
 }
-// Update entry for specific methodOop
+// Update entry for specific Method*
-void klassItable::initialize_with_method(methodOop m) {
+void klassItable::initialize_with_method(Method* m) {
 itableMethodEntry* ime = method_entry(0);
 for(int i = 0; i < _size_method_table; i++) {
 if (ime->method() == m) {
 ime->initialize(m);
 }
 ime++;
 }
 }
-void klassItable::adjust_method_entries(methodOop* old_methods, methodOop* new_methods,
+void klassItable::adjust_method_entries(Method** old_methods, Method** new_methods,
 int methods_length, bool * trace_name_printed) {
 // search the itable for uses of either obsolete or EMCP methods
 for (int j = 0; j < methods_length; j++) {
-methodOop old_method = old_methods[j];
+Method* old_method = old_methods[j];
-methodOop new_method = new_methods[j];
+Method* new_method = new_methods[j];
 itableMethodEntry* ime = method_entry(0);
 // The itable can describe more than one interface and the same
 // method signature can be specified by more than one interface.
 // This means we have to do an exhaustive search to find all the
 // RC_TRACE macro has an embedded ResourceMark
 RC_TRACE(0x00200000, ("itable method update: %s(%s)",
 new_method->name()->as_C_string(),
 new_method->signature()->as_C_string()));
 }
-break;
+// Cannot break because there might be another entry for this method
 }
 ime++;
 }
 }
 }
 // Setup
 class InterfaceVisiterClosure : public StackObj {
 public:
-virtual void doit(klassOop intf, int method_count) = 0;
+virtual void doit(Klass* intf, int method_count) = 0;
 };
 // Visit all interfaces with at-least one method (excluding <clinit>)
-void visit_all_interfaces(objArrayOop transitive_intf, InterfaceVisiterClosure *blk) {
+void visit_all_interfaces(Array<Klass*>* transitive_intf, InterfaceVisiterClosure *blk) {
 // Handle array argument
 for(int i = 0; i < transitive_intf->length(); i++) {
-klassOop intf = (klassOop)transitive_intf->obj_at(i);
+Klass* intf = transitive_intf->at(i);
 assert(Klass::cast(intf)->is_interface(), "sanity check");
 // Find no. of methods excluding a <clinit>
-int method_count = instanceKlass::cast(intf)->methods()->length();
+int method_count = InstanceKlass::cast(intf)->methods()->length();
 if (method_count > 0) {
-methodOop m = (methodOop)instanceKlass::cast(intf)->methods()->obj_at(0);
+Method* m = InstanceKlass::cast(intf)->methods()->at(0);
 assert(m != NULL && m->is_method(), "sanity check");
 if (m->name() == vmSymbols::object_initializer_name()) {
 method_count--;
 }
 }
 CountInterfacesClosure() { _nof_methods = 0; _nof_interfaces = 0; }
 int nof_methods() const    { return _nof_methods; }
 int nof_interfaces() const { return _nof_interfaces; }
-void doit(klassOop intf, int method_count) { _nof_methods += method_count; _nof_interfaces++; }
+void doit(Klass* intf, int method_count) { _nof_methods += method_count; _nof_interfaces++; }
 };
 class SetupItableClosure : public InterfaceVisiterClosure  {
 private:
 itableOffsetEntry* _offset_entry;
 _method_entry = method_entry;
 }
 itableMethodEntry* method_entry() const { return _method_entry; }
-void doit(klassOop intf, int method_count) {
+void doit(Klass* intf, int method_count) {
 int offset = ((address)_method_entry) - _klass_begin;
 _offset_entry->initialize(intf, offset);
 _offset_entry++;
 _method_entry += method_count;
 }
 };
-int klassItable::compute_itable_size(objArrayHandle transitive_interfaces) {
+int klassItable::compute_itable_size(Array<Klass*>* transitive_interfaces) {
 // Count no of interfaces and total number of interface methods
 CountInterfacesClosure cic;
-visit_all_interfaces(transitive_interfaces(), &cic);
+visit_all_interfaces(transitive_interfaces, &cic);
 // There's alway an extra itable entry so we can null-terminate it.
 int itable_size = calc_itable_size(cic.nof_interfaces() + 1, cic.nof_methods());
 // Statistics
 int nof_interfaces = cic.nof_interfaces();
 // Add one extra entry so we can null-terminate the table
 nof_interfaces++;
-assert(compute_itable_size(objArrayHandle(klass->transitive_interfaces())) ==
+assert(compute_itable_size(klass->transitive_interfaces()) ==
 calc_itable_size(nof_interfaces, nof_methods),
 "mismatch calculation of itable size");
 // Fill-out offset table
 itableOffsetEntry* ioe = (itableOffsetEntry*)klass->start_of_itable();
 intptr_t* end               = klass->end_of_itable();
 assert((oop*)(ime + nof_methods) <= (oop*)klass->start_of_nonstatic_oop_maps(), "wrong offset calculation (1)");
 assert((oop*)(end) == (oop*)(ime + nof_methods),                      "wrong offset calculation (2)");
 // Visit all interfaces and initialize itable offset table
-SetupItableClosure sic((address)klass->as_klassOop(), ioe, ime);
+SetupItableClosure sic((address)klass(), ioe, ime);
 visit_all_interfaces(klass->transitive_interfaces(), &sic);
 #ifdef ASSERT
 ime  = sic.method_entry();
 oop* v = (oop*) klass->end_of_itable();
 #endif
 }
 // m must be a method in an interface
-int klassItable::compute_itable_index(methodOop m) {
+int klassItable::compute_itable_index(Method* m) {
-klassOop intf = m->method_holder();
+Klass* intf = m->method_holder();
-assert(instanceKlass::cast(intf)->is_interface(), "sanity check");
+assert(InstanceKlass::cast(intf)->is_interface(), "sanity check");
-objArrayOop methods = instanceKlass::cast(intf)->methods();
+Array<Method*>* methods = InstanceKlass::cast(intf)->methods();
 int index = 0;
-while(methods->obj_at(index) != m) {
+while(methods->at(index) != m) {
 index++;
 assert(index < methods->length(), "should find index for resolve_invoke");
 }
 // Adjust for <clinit>, which is left out of table if first method
-if (methods->length() > 0 && ((methodOop)methods->obj_at(0))->is_static_initializer()) {
+if (methods->length() > 0 && methods->at(0)->is_static_initializer()) {
 index--;
 }
 return index;
 }
 // inverse to compute_itable_index
-methodOop klassItable::method_for_itable_index(klassOop intf, int itable_index) {
+Method* klassItable::method_for_itable_index(Klass* intf, int itable_index) {
-assert(instanceKlass::cast(intf)->is_interface(), "sanity check");
+assert(InstanceKlass::cast(intf)->is_interface(), "sanity check");
-objArrayOop methods = instanceKlass::cast(intf)->methods();
+Array<Method*>* methods = InstanceKlass::cast(intf)->methods();
 int index = itable_index;
 // Adjust for <clinit>, which is left out of table if first method
-if (methods->length() > 0 && ((methodOop)methods->obj_at(0))->is_static_initializer()) {
+if (methods->length() > 0 && methods->at(0)->is_static_initializer()) {
 index++;
 }
 if (itable_index < 0 || index >= methods->length())
 return NULL;                // help caller defend against bad indexes
-methodOop m = (methodOop)methods->obj_at(index);
+Method* m = methods->at(index);
 assert(compute_itable_index(m) == itable_index, "correct inverse");
 return m;
 }
 "end)", _klass->internal_name()));
 }
 for (int i = 0; i < _length; i++) table()[i].verify(this, st);
 // verify consistency with superKlass vtable
-klassOop super = _klass->super();
+Klass* super = _klass->super();
 if (super != NULL) {
-instanceKlass* sk = instanceKlass::cast(super);
+InstanceKlass* sk = InstanceKlass::cast(super);
 klassVtable* vt = sk->vtable();
 for (int i = 0; i < vt->length(); i++) {
 verify_against(st, vt, i);
 }
 }
 static int fixed;                     // total fixed overhead in bytes
 static int filler;                    // overhead caused by filler bytes
 static int entries;                   // total bytes consumed by vtable entries
 static int array_entries;             // total bytes consumed by array vtable entries
-static void do_class(klassOop k) {
+static void do_class(Klass* k) {
-Klass* kl = k->klass_part();
+Klass* kl = k;
 klassVtable* vt = kl->vtable();
 if (vt == NULL) return;
 no_klasses++;
 if (kl->oop_is_instance()) {
 no_instance_klasses++;
 static void compute() {
 SystemDictionary::classes_do(do_class);
 fixed  = no_klasses * oopSize;      // vtable length
 // filler size is a conservative approximation
-filler = oopSize * (no_klasses - no_instance_klasses) * (sizeof(instanceKlass) - sizeof(arrayKlass) - 1);
+filler = oopSize * (no_klasses - no_instance_klasses) * (sizeof(InstanceKlass) - sizeof(arrayKlass) - 1);
 entries = sizeof(vtableEntry) * sum_of_vtable_len;
 array_entries = sizeof(vtableEntry) * sum_of_array_vtable_len;
 }
 };
 }
 bool klassVtable::check_no_old_entries() {
 // Check that there really is no entry
 for (int i = 0; i < length(); i++) {
-methodOop m = unchecked_method_at(i);
+Method* m = unchecked_method_at(i);
 if (m != NULL) {
-if (m->is_old()) {
+if (!m->is_valid() || m->is_old()) {
 return false;
 }
 }
 }
 return true;
 }
 void klassVtable::dump_vtable() {
 tty->print_cr("vtable dump --");
 for (int i = 0; i < length(); i++) {
-methodOop m = unchecked_method_at(i);
+Method* m = unchecked_method_at(i);
 if (m != NULL) {
 tty->print("      (%5d)  ", i);
 m->access_flags().print_on(tty);
 tty->print(" --  ");
 m->print_name(tty);
 tty->cr();
 }
 }
 }
+bool klassItable::check_no_old_entries() {
+itableMethodEntry* ime = method_entry(0);
+for(int i = 0; i < _size_method_table; i++) {
+Method* m = ime->method();
+if (m != NULL && (!m->is_valid() || m->is_old())) return false;
+ime++;
+}
+return true;
+}
 int  klassItable::_total_classes;   // Total no. of classes with itables
 long klassItable::_total_size;      // Total no. of bytes used for itables
 void klassItable::print_statistics() {
 tty->print_cr("itable statistics:");

Mercurial > hg > truffle

comparison src/share/vm/oops/klassVtable.cpp @ 6725:da91efe96a93