--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/ci/ciObjectFactory.cpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,757 @@
+/*
+ * Copyright (c) 1999, 2017, 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.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "ci/ciCallSite.hpp"
+#include "ci/ciInstance.hpp"
+#include "ci/ciInstanceKlass.hpp"
+#include "ci/ciMemberName.hpp"
+#include "ci/ciMethod.hpp"
+#include "ci/ciMethodData.hpp"
+#include "ci/ciMethodHandle.hpp"
+#include "ci/ciMethodType.hpp"
+#include "ci/ciNullObject.hpp"
+#include "ci/ciObjArray.hpp"
+#include "ci/ciObjArrayKlass.hpp"
+#include "ci/ciObject.hpp"
+#include "ci/ciObjectFactory.hpp"
+#include "ci/ciSymbol.hpp"
+#include "ci/ciTypeArray.hpp"
+#include "ci/ciTypeArrayKlass.hpp"
+#include "ci/ciUtilities.hpp"
+#include "classfile/javaClasses.inline.hpp"
+#include "classfile/systemDictionary.hpp"
+#include "gc/shared/collectedHeap.inline.hpp"
+#include "memory/allocation.inline.hpp"
+#include "oops/oop.inline.hpp"
+#include "runtime/fieldType.hpp"
+#include "utilities/macros.hpp"
+#if INCLUDE_ALL_GCS
+# include "gc/g1/g1SATBCardTableModRefBS.hpp"
+#endif
+
+// ciObjectFactory
+//
+// This class handles requests for the creation of new instances
+// of ciObject and its subclasses. It contains a caching mechanism
+// which ensures that for each oop, at most one ciObject is created.
+// This invariant allows more efficient implementation of ciObject.
+//
+// Implementation note: the oop->ciObject mapping is represented as
+// a table stored in an array. Even though objects are moved
+// by the garbage collector, the compactor preserves their relative
+// order; address comparison of oops (in perm space) is safe so long
+// as we prohibit GC during our comparisons. We currently use binary
+// search to find the oop in the table, and inserting a new oop
+// into the table may be costly. If this cost ends up being
+// problematic the underlying data structure can be switched to some
+// sort of balanced binary tree.
+
+GrowableArray<ciMetadata*>* ciObjectFactory::_shared_ci_metadata = NULL;
+ciSymbol* ciObjectFactory::_shared_ci_symbols[vmSymbols::SID_LIMIT];
+int ciObjectFactory::_shared_ident_limit = 0;
+volatile bool ciObjectFactory::_initialized = false;
+
+
+// ------------------------------------------------------------------
+// ciObjectFactory::ciObjectFactory
+ciObjectFactory::ciObjectFactory(Arena* arena,
+ int expected_size) {
+
+ for (int i = 0; i < NON_PERM_BUCKETS; i++) {
+ _non_perm_bucket[i] = NULL;
+ }
+ _non_perm_count = 0;
+
+ _next_ident = _shared_ident_limit;
+ _arena = arena;
+ _ci_metadata = new (arena) GrowableArray<ciMetadata*>(arena, expected_size, 0, NULL);
+
+ // If the shared ci objects exist append them to this factory's objects
+
+ if (_shared_ci_metadata != NULL) {
+ _ci_metadata->appendAll(_shared_ci_metadata);
+ }
+
+ _unloaded_methods = new (arena) GrowableArray<ciMethod*>(arena, 4, 0, NULL);
+ _unloaded_klasses = new (arena) GrowableArray<ciKlass*>(arena, 8, 0, NULL);
+ _unloaded_instances = new (arena) GrowableArray<ciInstance*>(arena, 4, 0, NULL);
+ _return_addresses =
+ new (arena) GrowableArray<ciReturnAddress*>(arena, 8, 0, NULL);
+
+ _symbols = new (arena) GrowableArray<ciSymbol*>(arena, 100, 0, NULL);
+}
+
+// ------------------------------------------------------------------
+// ciObjectFactory::ciObjectFactory
+void ciObjectFactory::initialize() {
+ ASSERT_IN_VM;
+ JavaThread* thread = JavaThread::current();
+ HandleMark handle_mark(thread);
+
+ // This Arena is long lived and exists in the resource mark of the
+ // compiler thread that initializes the initial ciObjectFactory which
+ // creates the shared ciObjects that all later ciObjectFactories use.
+ Arena* arena = new (mtCompiler) Arena(mtCompiler);
+ ciEnv initial(arena);
+ ciEnv* env = ciEnv::current();
+ env->_factory->init_shared_objects();
+
+ _initialized = true;
+
+}
+
+void ciObjectFactory::init_shared_objects() {
+
+ _next_ident = 1; // start numbering CI objects at 1
+
+ {
+ // Create the shared symbols, but not in _shared_ci_metadata.
+ int i;
+ for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) {
+ Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i);
+ assert(vmSymbols::find_sid(vmsym) == i, "1-1 mapping");
+ ciSymbol* sym = new (_arena) ciSymbol(vmsym, (vmSymbols::SID) i);
+ init_ident_of(sym);
+ _shared_ci_symbols[i] = sym;
+ }
+#ifdef ASSERT
+ for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) {
+ Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i);
+ ciSymbol* sym = vm_symbol_at((vmSymbols::SID) i);
+ assert(sym->get_symbol() == vmsym, "oop must match");
+ }
+ assert(ciSymbol::void_class_signature()->get_symbol() == vmSymbols::void_class_signature(), "spot check");
+#endif
+ }
+
+ _ci_metadata = new (_arena) GrowableArray<ciMetadata*>(_arena, 64, 0, NULL);
+
+ for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) {
+ BasicType t = (BasicType)i;
+ if (type2name(t) != NULL && t != T_OBJECT && t != T_ARRAY && t != T_NARROWOOP && t != T_NARROWKLASS) {
+ ciType::_basic_types[t] = new (_arena) ciType(t);
+ init_ident_of(ciType::_basic_types[t]);
+ }
+ }
+
+ ciEnv::_null_object_instance = new (_arena) ciNullObject();
+ init_ident_of(ciEnv::_null_object_instance);
+
+#define WK_KLASS_DEFN(name, ignore_s, opt) \
+ if (SystemDictionary::name() != NULL) \
+ ciEnv::_##name = get_metadata(SystemDictionary::name())->as_instance_klass();
+
+ WK_KLASSES_DO(WK_KLASS_DEFN)
+#undef WK_KLASS_DEFN
+
+ for (int len = -1; len != _ci_metadata->length(); ) {
+ len = _ci_metadata->length();
+ for (int i2 = 0; i2 < len; i2++) {
+ ciMetadata* obj = _ci_metadata->at(i2);
+ assert (obj->is_metadata(), "what else would it be?");
+ if (obj->is_loaded() && obj->is_instance_klass()) {
+ obj->as_instance_klass()->compute_nonstatic_fields();
+ }
+ }
+ }
+
+ ciEnv::_unloaded_cisymbol = ciObjectFactory::get_symbol(vmSymbols::dummy_symbol());
+ // Create dummy InstanceKlass and ObjArrayKlass object and assign them idents
+ ciEnv::_unloaded_ciinstance_klass = new (_arena) ciInstanceKlass(ciEnv::_unloaded_cisymbol, NULL, NULL);
+ init_ident_of(ciEnv::_unloaded_ciinstance_klass);
+ ciEnv::_unloaded_ciobjarrayklass = new (_arena) ciObjArrayKlass(ciEnv::_unloaded_cisymbol, ciEnv::_unloaded_ciinstance_klass, 1);
+ init_ident_of(ciEnv::_unloaded_ciobjarrayklass);
+ assert(ciEnv::_unloaded_ciobjarrayklass->is_obj_array_klass(), "just checking");
+
+ get_metadata(Universe::boolArrayKlassObj());
+ get_metadata(Universe::charArrayKlassObj());
+ get_metadata(Universe::singleArrayKlassObj());
+ get_metadata(Universe::doubleArrayKlassObj());
+ get_metadata(Universe::byteArrayKlassObj());
+ get_metadata(Universe::shortArrayKlassObj());
+ get_metadata(Universe::intArrayKlassObj());
+ get_metadata(Universe::longArrayKlassObj());
+
+
+
+ assert(_non_perm_count == 0, "no shared non-perm objects");
+
+ // The shared_ident_limit is the first ident number that will
+ // be used for non-shared objects. That is, numbers less than
+ // this limit are permanently assigned to shared CI objects,
+ // while the higher numbers are recycled afresh by each new ciEnv.
+
+ _shared_ident_limit = _next_ident;
+ _shared_ci_metadata = _ci_metadata;
+}
+
+
+ciSymbol* ciObjectFactory::get_symbol(Symbol* key) {
+ vmSymbols::SID sid = vmSymbols::find_sid(key);
+ if (sid != vmSymbols::NO_SID) {
+ // do not pollute the main cache with it
+ return vm_symbol_at(sid);
+ }
+
+ assert(vmSymbols::find_sid(key) == vmSymbols::NO_SID, "");
+ ciSymbol* s = new (arena()) ciSymbol(key, vmSymbols::NO_SID);
+ _symbols->push(s);
+ return s;
+}
+
+// Decrement the refcount when done on symbols referenced by this compilation.
+void ciObjectFactory::remove_symbols() {
+ for (int i = 0; i < _symbols->length(); i++) {
+ ciSymbol* s = _symbols->at(i);
+ s->get_symbol()->decrement_refcount();
+ }
+ // Since _symbols is resource allocated we're not allowed to delete it
+ // but it'll go away just the same.
+}
+
+// ------------------------------------------------------------------
+// ciObjectFactory::get
+//
+// Get the ciObject corresponding to some oop. If the ciObject has
+// already been created, it is returned. Otherwise, a new ciObject
+// is created.
+ciObject* ciObjectFactory::get(oop key) {
+ ASSERT_IN_VM;
+
+ assert(Universe::heap()->is_in_reserved(key), "must be");
+
+ NonPermObject* &bucket = find_non_perm(key);
+ if (bucket != NULL) {
+ return bucket->object();
+ }
+
+ // The ciObject does not yet exist. Create it and insert it
+ // into the cache.
+ Handle keyHandle(Thread::current(), key);
+ ciObject* new_object = create_new_object(keyHandle());
+ assert(keyHandle() == new_object->get_oop(), "must be properly recorded");
+ init_ident_of(new_object);
+ assert(Universe::heap()->is_in_reserved(new_object->get_oop()), "must be");
+
+ // Not a perm-space object.
+ insert_non_perm(bucket, keyHandle(), new_object);
+ return new_object;
+}
+
+int ciObjectFactory::metadata_compare(Metadata* const& key, ciMetadata* const& elt) {
+ Metadata* value = elt->constant_encoding();
+ if (key < value) return -1;
+ else if (key > value) return 1;
+ else return 0;
+}
+
+// ------------------------------------------------------------------
+// ciObjectFactory::get_metadata
+//
+// Get the ciMetadata corresponding to some Metadata. If the ciMetadata has
+// already been created, it is returned. Otherwise, a new ciMetadata
+// is created.
+ciMetadata* ciObjectFactory::get_metadata(Metadata* key) {
+ ASSERT_IN_VM;
+
+#ifdef ASSERT
+ if (CIObjectFactoryVerify) {
+ Metadata* last = NULL;
+ for (int j = 0; j< _ci_metadata->length(); j++) {
+ Metadata* o = _ci_metadata->at(j)->constant_encoding();
+ assert(last < o, "out of order");
+ last = o;
+ }
+ }
+#endif // ASSERT
+ int len = _ci_metadata->length();
+ bool found = false;
+ int index = _ci_metadata->find_sorted<Metadata*, ciObjectFactory::metadata_compare>(key, found);
+#ifdef ASSERT
+ if (CIObjectFactoryVerify) {
+ for (int i=0; i<_ci_metadata->length(); i++) {
+ if (_ci_metadata->at(i)->constant_encoding() == key) {
+ assert(index == i, " bad lookup");
+ }
+ }
+ }
+#endif
+
+ if (!found) {
+ // The ciMetadata does not yet exist. Create it and insert it
+ // into the cache.
+ ciMetadata* new_object = create_new_metadata(key);
+ init_ident_of(new_object);
+ assert(new_object->is_metadata(), "must be");
+
+ if (len != _ci_metadata->length()) {
+ // creating the new object has recursively entered new objects
+ // into the table. We need to recompute our index.
+ index = _ci_metadata->find_sorted<Metadata*, ciObjectFactory::metadata_compare>(key, found);
+ }
+ assert(!found, "no double insert");
+ _ci_metadata->insert_before(index, new_object);
+ return new_object;
+ }
+ return _ci_metadata->at(index)->as_metadata();
+}
+
+// ------------------------------------------------------------------
+// ciObjectFactory::create_new_object
+//
+// Create a new ciObject from an oop.
+//
+// Implementation note: this functionality could be virtual behavior
+// of the oop itself. For now, we explicitly marshal the object.
+ciObject* ciObjectFactory::create_new_object(oop o) {
+ EXCEPTION_CONTEXT;
+
+ if (o->is_instance()) {
+ instanceHandle h_i(THREAD, (instanceOop)o);
+ if (java_lang_invoke_CallSite::is_instance(o))
+ return new (arena()) ciCallSite(h_i);
+ else if (java_lang_invoke_MemberName::is_instance(o))
+ return new (arena()) ciMemberName(h_i);
+ else if (java_lang_invoke_MethodHandle::is_instance(o))
+ return new (arena()) ciMethodHandle(h_i);
+ else if (java_lang_invoke_MethodType::is_instance(o))
+ return new (arena()) ciMethodType(h_i);
+ else
+ return new (arena()) ciInstance(h_i);
+ } else if (o->is_objArray()) {
+ objArrayHandle h_oa(THREAD, (objArrayOop)o);
+ return new (arena()) ciObjArray(h_oa);
+ } else if (o->is_typeArray()) {
+ typeArrayHandle h_ta(THREAD, (typeArrayOop)o);
+ return new (arena()) ciTypeArray(h_ta);
+ }
+
+ // The oop is of some type not supported by the compiler interface.
+ ShouldNotReachHere();
+ return NULL;
+}
+
+// ------------------------------------------------------------------
+// ciObjectFactory::create_new_metadata
+//
+// Create a new ciMetadata from a Metadata*.
+//
+// Implementation note: in order to keep Metadata live, an auxiliary ciObject
+// is used, which points to it's holder.
+ciMetadata* ciObjectFactory::create_new_metadata(Metadata* o) {
+ EXCEPTION_CONTEXT;
+
+ // Hold metadata from unloading by keeping it's holder alive.
+ if (_initialized && o->is_klass()) {
+ Klass* holder = ((Klass*)o);
+ if (holder->is_instance_klass() && InstanceKlass::cast(holder)->is_anonymous()) {
+ // Though ciInstanceKlass records class loader oop, it's not enough to keep
+ // VM anonymous classes alive (loader == NULL). Klass holder should be used instead.
+ // It is enough to record a ciObject, since cached elements are never removed
+ // during ciObjectFactory lifetime. ciObjectFactory itself is created for
+ // every compilation and lives for the whole duration of the compilation.
+ ciObject* h = get(holder->klass_holder());
+ }
+ }
+
+ if (o->is_klass()) {
+ Klass* k = (Klass*)o;
+ if (k->is_instance_klass()) {
+ return new (arena()) ciInstanceKlass(k);
+ } else if (k->is_objArray_klass()) {
+ return new (arena()) ciObjArrayKlass(k);
+ } else if (k->is_typeArray_klass()) {
+ return new (arena()) ciTypeArrayKlass(k);
+ }
+ } else if (o->is_method()) {
+ methodHandle h_m(THREAD, (Method*)o);
+ ciEnv *env = CURRENT_THREAD_ENV;
+ ciInstanceKlass* holder = env->get_instance_klass(h_m()->method_holder());
+ return new (arena()) ciMethod(h_m, holder);
+ } else if (o->is_methodData()) {
+ // Hold methodHandle alive - might not be necessary ???
+ methodHandle h_m(THREAD, ((MethodData*)o)->method());
+ return new (arena()) ciMethodData((MethodData*)o);
+ }
+
+ // The Metadata* is of some type not supported by the compiler interface.
+ ShouldNotReachHere();
+ return NULL;
+}
+
+// ------------------------------------------------------------------
+// ciObjectFactory::ensure_metadata_alive
+//
+// Ensure that the metadata wrapped by the ciMetadata is kept alive by GC.
+// This is primarily useful for metadata which is considered as weak roots
+// by the GC but need to be strong roots if reachable from a current compilation.
+//
+void ciObjectFactory::ensure_metadata_alive(ciMetadata* m) {
+ ASSERT_IN_VM; // We're handling raw oops here.
+
+#if INCLUDE_ALL_GCS
+ if (!UseG1GC) {
+ return;
+ }
+ Klass* metadata_owner_klass;
+ if (m->is_klass()) {
+ metadata_owner_klass = m->as_klass()->get_Klass();
+ } else if (m->is_method()) {
+ metadata_owner_klass = m->as_method()->get_Method()->constants()->pool_holder();
+ } else {
+ fatal("Not implemented for other types of metadata");
+ return;
+ }
+
+ oop metadata_holder = metadata_owner_klass->klass_holder();
+ if (metadata_holder != NULL) {
+ G1SATBCardTableModRefBS::enqueue(metadata_holder);
+ }
+
+#endif
+}
+
+//------------------------------------------------------------------
+// ciObjectFactory::get_unloaded_method
+//
+// Get the ciMethod representing an unloaded/unfound method.
+//
+// Implementation note: unloaded methods are currently stored in
+// an unordered array, requiring a linear-time lookup for each
+// unloaded method. This may need to change.
+ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder,
+ ciSymbol* name,
+ ciSymbol* signature,
+ ciInstanceKlass* accessor) {
+ ciSignature* that = NULL;
+ for (int i = 0; i < _unloaded_methods->length(); i++) {
+ ciMethod* entry = _unloaded_methods->at(i);
+ if (entry->holder()->equals(holder) &&
+ entry->name()->equals(name) &&
+ entry->signature()->as_symbol()->equals(signature)) {
+ // Short-circuit slow resolve.
+ if (entry->signature()->accessing_klass() == accessor) {
+ // We've found a match.
+ return entry;
+ } else {
+ // Lazily create ciSignature
+ if (that == NULL) that = new (arena()) ciSignature(accessor, constantPoolHandle(), signature);
+ if (entry->signature()->equals(that)) {
+ // We've found a match.
+ return entry;
+ }
+ }
+ }
+ }
+
+ // This is a new unloaded method. Create it and stick it in
+ // the cache.
+ ciMethod* new_method = new (arena()) ciMethod(holder, name, signature, accessor);
+
+ init_ident_of(new_method);
+ _unloaded_methods->append(new_method);
+
+ return new_method;
+}
+
+//------------------------------------------------------------------
+// ciObjectFactory::get_unloaded_klass
+//
+// Get a ciKlass representing an unloaded klass.
+//
+// Implementation note: unloaded klasses are currently stored in
+// an unordered array, requiring a linear-time lookup for each
+// unloaded klass. This may need to change.
+ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass,
+ ciSymbol* name,
+ bool create_if_not_found) {
+ EXCEPTION_CONTEXT;
+ oop loader = NULL;
+ oop domain = NULL;
+ if (accessing_klass != NULL) {
+ loader = accessing_klass->loader();
+ domain = accessing_klass->protection_domain();
+ }
+ for (int i=0; i<_unloaded_klasses->length(); i++) {
+ ciKlass* entry = _unloaded_klasses->at(i);
+ if (entry->name()->equals(name) &&
+ entry->loader() == loader &&
+ entry->protection_domain() == domain) {
+ // We've found a match.
+ return entry;
+ }
+ }
+
+ if (!create_if_not_found)
+ return NULL;
+
+ // This is a new unloaded klass. Create it and stick it in
+ // the cache.
+ ciKlass* new_klass = NULL;
+
+ // Two cases: this is an unloaded ObjArrayKlass or an
+ // unloaded InstanceKlass. Deal with both.
+ if (name->byte_at(0) == '[') {
+ // Decompose the name.'
+ FieldArrayInfo fd;
+ BasicType element_type = FieldType::get_array_info(name->get_symbol(),
+ fd, THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION;
+ CURRENT_THREAD_ENV->record_out_of_memory_failure();
+ return ciEnv::_unloaded_ciobjarrayklass;
+ }
+ int dimension = fd.dimension();
+ assert(element_type != T_ARRAY, "unsuccessful decomposition");
+ ciKlass* element_klass = NULL;
+ if (element_type == T_OBJECT) {
+ ciEnv *env = CURRENT_THREAD_ENV;
+ ciSymbol* ci_name = env->get_symbol(fd.object_key());
+ element_klass =
+ env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass();
+ } else {
+ assert(dimension > 1, "one dimensional type arrays are always loaded.");
+
+ // The type array itself takes care of one of the dimensions.
+ dimension--;
+
+ // The element klass is a TypeArrayKlass.
+ element_klass = ciTypeArrayKlass::make(element_type);
+ }
+ new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension);
+ } else {
+ jobject loader_handle = NULL;
+ jobject domain_handle = NULL;
+ if (accessing_klass != NULL) {
+ loader_handle = accessing_klass->loader_handle();
+ domain_handle = accessing_klass->protection_domain_handle();
+ }
+ new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle);
+ }
+ init_ident_of(new_klass);
+ _unloaded_klasses->append(new_klass);
+
+ return new_klass;
+}
+
+
+//------------------------------------------------------------------
+// ciObjectFactory::get_unloaded_instance
+//
+// Get a ciInstance representing an as-yet undetermined instance of a given class.
+//
+ciInstance* ciObjectFactory::get_unloaded_instance(ciInstanceKlass* instance_klass) {
+ for (int i=0; i<_unloaded_instances->length(); i++) {
+ ciInstance* entry = _unloaded_instances->at(i);
+ if (entry->klass()->equals(instance_klass)) {
+ // We've found a match.
+ return entry;
+ }
+ }
+
+ // This is a new unloaded instance. Create it and stick it in
+ // the cache.
+ ciInstance* new_instance = new (arena()) ciInstance(instance_klass);
+
+ init_ident_of(new_instance);
+ _unloaded_instances->append(new_instance);
+
+ // make sure it looks the way we want:
+ assert(!new_instance->is_loaded(), "");
+ assert(new_instance->klass() == instance_klass, "");
+
+ return new_instance;
+}
+
+
+//------------------------------------------------------------------
+// ciObjectFactory::get_unloaded_klass_mirror
+//
+// Get a ciInstance representing an unresolved klass mirror.
+//
+// Currently, this ignores the parameters and returns a unique unloaded instance.
+ciInstance* ciObjectFactory::get_unloaded_klass_mirror(ciKlass* type) {
+ assert(ciEnv::_Class_klass != NULL, "");
+ return get_unloaded_instance(ciEnv::_Class_klass->as_instance_klass());
+}
+
+//------------------------------------------------------------------
+// ciObjectFactory::get_unloaded_method_handle_constant
+//
+// Get a ciInstance representing an unresolved method handle constant.
+//
+// Currently, this ignores the parameters and returns a unique unloaded instance.
+ciInstance* ciObjectFactory::get_unloaded_method_handle_constant(ciKlass* holder,
+ ciSymbol* name,
+ ciSymbol* signature,
+ int ref_kind) {
+ if (ciEnv::_MethodHandle_klass == NULL) return NULL;
+ return get_unloaded_instance(ciEnv::_MethodHandle_klass->as_instance_klass());
+}
+
+//------------------------------------------------------------------
+// ciObjectFactory::get_unloaded_method_type_constant
+//
+// Get a ciInstance representing an unresolved method type constant.
+//
+// Currently, this ignores the parameters and returns a unique unloaded instance.
+ciInstance* ciObjectFactory::get_unloaded_method_type_constant(ciSymbol* signature) {
+ if (ciEnv::_MethodType_klass == NULL) return NULL;
+ return get_unloaded_instance(ciEnv::_MethodType_klass->as_instance_klass());
+}
+
+ciInstance* ciObjectFactory::get_unloaded_object_constant() {
+ if (ciEnv::_Object_klass == NULL) return NULL;
+ return get_unloaded_instance(ciEnv::_Object_klass->as_instance_klass());
+}
+
+//------------------------------------------------------------------
+// ciObjectFactory::get_empty_methodData
+//
+// Get the ciMethodData representing the methodData for a method with
+// none.
+ciMethodData* ciObjectFactory::get_empty_methodData() {
+ ciMethodData* new_methodData = new (arena()) ciMethodData();
+ init_ident_of(new_methodData);
+ return new_methodData;
+}
+
+//------------------------------------------------------------------
+// ciObjectFactory::get_return_address
+//
+// Get a ciReturnAddress for a specified bci.
+ciReturnAddress* ciObjectFactory::get_return_address(int bci) {
+ for (int i=0; i<_return_addresses->length(); i++) {
+ ciReturnAddress* entry = _return_addresses->at(i);
+ if (entry->bci() == bci) {
+ // We've found a match.
+ return entry;
+ }
+ }
+
+ ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci);
+ init_ident_of(new_ret_addr);
+ _return_addresses->append(new_ret_addr);
+ return new_ret_addr;
+}
+
+// ------------------------------------------------------------------
+// ciObjectFactory::init_ident_of
+void ciObjectFactory::init_ident_of(ciBaseObject* obj) {
+ obj->set_ident(_next_ident++);
+}
+
+static ciObjectFactory::NonPermObject* emptyBucket = NULL;
+
+// ------------------------------------------------------------------
+// ciObjectFactory::find_non_perm
+//
+// Use a small hash table, hashed on the klass of the key.
+// If there is no entry in the cache corresponding to this oop, return
+// the null tail of the bucket into which the oop should be inserted.
+ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) {
+ assert(Universe::heap()->is_in_reserved(key), "must be");
+ ciMetadata* klass = get_metadata(key->klass());
+ NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS];
+ for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) {
+ if (is_equal(p, key)) break;
+ }
+ return (*bp);
+}
+
+
+
+// ------------------------------------------------------------------
+// Code for for NonPermObject
+//
+inline ciObjectFactory::NonPermObject::NonPermObject(ciObjectFactory::NonPermObject* &bucket, oop key, ciObject* object) {
+ assert(ciObjectFactory::is_initialized(), "");
+ _object = object;
+ _next = bucket;
+ bucket = this;
+}
+
+
+
+// ------------------------------------------------------------------
+// ciObjectFactory::insert_non_perm
+//
+// Insert a ciObject into the non-perm table.
+void ciObjectFactory::insert_non_perm(ciObjectFactory::NonPermObject* &where, oop key, ciObject* obj) {
+ assert(Universe::heap()->is_in_reserved_or_null(key), "must be");
+ assert(&where != &emptyBucket, "must not try to fill empty bucket");
+ NonPermObject* p = new (arena()) NonPermObject(where, key, obj);
+ assert(where == p && is_equal(p, key) && p->object() == obj, "entry must match");
+ assert(find_non_perm(key) == p, "must find the same spot");
+ ++_non_perm_count;
+}
+
+// ------------------------------------------------------------------
+// ciObjectFactory::vm_symbol_at
+// Get the ciSymbol corresponding to some index in vmSymbols.
+ciSymbol* ciObjectFactory::vm_symbol_at(int index) {
+ assert(index >= vmSymbols::FIRST_SID && index < vmSymbols::SID_LIMIT, "oob");
+ return _shared_ci_symbols[index];
+}
+
+// ------------------------------------------------------------------
+// ciObjectFactory::metadata_do
+void ciObjectFactory::metadata_do(void f(Metadata*)) {
+ if (_ci_metadata == NULL) return;
+ for (int j = 0; j< _ci_metadata->length(); j++) {
+ Metadata* o = _ci_metadata->at(j)->constant_encoding();
+ f(o);
+ }
+}
+
+// ------------------------------------------------------------------
+// ciObjectFactory::print_contents_impl
+void ciObjectFactory::print_contents_impl() {
+ int len = _ci_metadata->length();
+ tty->print_cr("ciObjectFactory (%d) meta data contents:", len);
+ for (int i=0; i<len; i++) {
+ _ci_metadata->at(i)->print();
+ tty->cr();
+ }
+}
+
+// ------------------------------------------------------------------
+// ciObjectFactory::print_contents
+void ciObjectFactory::print_contents() {
+ print();
+ tty->cr();
+ GUARDED_VM_ENTRY(print_contents_impl();)
+}
+
+// ------------------------------------------------------------------
+// ciObjectFactory::print
+//
+// Print debugging information about the object factory
+void ciObjectFactory::print() {
+ tty->print("<ciObjectFactory oops=%d metadata=%d unloaded_methods=%d unloaded_instances=%d unloaded_klasses=%d>",
+ _non_perm_count, _ci_metadata->length(), _unloaded_methods->length(),
+ _unloaded_instances->length(),
+ _unloaded_klasses->length());
+}