Mercurial > hg > graal-compiler
view src/share/vm/ci/ciObjectFactory.cpp @ 20673:01de5cfa06c1
Added tag hs25.40-b21 for changeset 6bf89bfe8185
author | amurillo |
---|---|
date | Thu, 27 Nov 2014 09:48:34 -0800 |
parents | 6a528388c7da |
children | 7848fc12602b |
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/* * Copyright (c) 1999, 2014, 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/systemDictionary.hpp" #include "gc_interface/collectedHeap.inline.hpp" #include "memory/allocation.inline.hpp" #include "oops/oop.inline.hpp" #include "oops/oop.inline2.hpp" #include "runtime/fieldType.hpp" #if INCLUDE_ALL_GCS # include "gc_implementation/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(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; } // ------------------------------------------------------------------ // 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(); int index = find(key, _ci_metadata); #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 (!is_found_at(index, key, _ci_metadata)) { // 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 = find(key, _ci_metadata); } assert(!is_found_at(index, key, _ci_metadata), "no double insert"); insert(index, new_object, _ci_metadata); 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->oop_is_instance() && 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()) { KlassHandle h_k(THREAD, (Klass*)o); Klass* k = (Klass*)o; if (k->oop_is_instance()) { return new (arena()) ciInstanceKlass(h_k); } else if (k->oop_is_objArray()) { return new (arena()) ciObjArrayKlass(h_k); } else if (k->oop_is_typeArray()) { return new (arena()) ciTypeArrayKlass(h_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"); } 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++); } // ------------------------------------------------------------------ // ciObjectFactory::find // // Use binary search to find the position of this oop in the cache. // If there is no entry in the cache corresponding to this oop, return // the position at which the oop should be inserted. int ciObjectFactory::find(Metadata* key, GrowableArray<ciMetadata*>* objects) { int min = 0; int max = objects->length()-1; // print_contents(); while (max >= min) { int mid = (max + min) / 2; Metadata* value = objects->at(mid)->constant_encoding(); if (value < key) { min = mid + 1; } else if (value > key) { max = mid - 1; } else { return mid; } } return min; } // ------------------------------------------------------------------ // ciObjectFactory::is_found_at // // Verify that the binary seach found the given key. bool ciObjectFactory::is_found_at(int index, Metadata* key, GrowableArray<ciMetadata*>* objects) { return (index < objects->length() && objects->at(index)->constant_encoding() == key); } // ------------------------------------------------------------------ // ciObjectFactory::insert // // Insert a ciObject into the table at some index. void ciObjectFactory::insert(int index, ciMetadata* obj, GrowableArray<ciMetadata*>* objects) { int len = objects->length(); if (len == index) { objects->append(obj); } else { objects->append(objects->at(len-1)); int pos; for (pos = len-2; pos >= index; pos--) { objects->at_put(pos+1,objects->at(pos)); } objects->at_put(index, obj); } } 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()); }