author | twisti |
Tue, 24 Jul 2012 10:51:00 -0700 | |
changeset 13391 | 30245956af37 |
parent 13195 | be27e1b6a4b9 |
child 13728 | 882756847a04 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#include "precompiled.hpp" |
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#include "ci/ciCPCache.hpp" |
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#include "ci/ciCallSite.hpp" |
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#include "ci/ciInstance.hpp" |
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#include "ci/ciInstanceKlass.hpp" |
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#include "ci/ciInstanceKlassKlass.hpp" |
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#include "ci/ciMemberName.hpp" |
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#include "ci/ciMethod.hpp" |
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#include "ci/ciMethodData.hpp" |
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#include "ci/ciMethodHandle.hpp" |
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#include "ci/ciMethodKlass.hpp" |
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#include "ci/ciNullObject.hpp" |
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#include "ci/ciObjArray.hpp" |
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#include "ci/ciObjArrayKlass.hpp" |
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#include "ci/ciObjArrayKlassKlass.hpp" |
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#include "ci/ciObjectFactory.hpp" |
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#include "ci/ciSymbol.hpp" |
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#include "ci/ciTypeArray.hpp" |
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#include "ci/ciTypeArrayKlass.hpp" |
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#include "ci/ciTypeArrayKlassKlass.hpp" |
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#include "ci/ciUtilities.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "gc_interface/collectedHeap.inline.hpp" |
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#include "memory/allocation.inline.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "oops/oop.inline2.hpp" |
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#include "runtime/fieldType.hpp" |
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// ciObjectFactory |
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// |
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// This class handles requests for the creation of new instances |
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// of ciObject and its subclasses. It contains a caching mechanism |
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// which ensures that for each oop, at most one ciObject is created. |
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// This invariant allows more efficient implementation of ciObject. |
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// |
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// Implementation note: the oop->ciObject mapping is represented as |
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// a table stored in an array. Even though objects are moved |
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// by the garbage collector, the compactor preserves their relative |
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// order; address comparison of oops (in perm space) is safe so long |
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// as we prohibit GC during our comparisons. We currently use binary |
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// search to find the oop in the table, and inserting a new oop |
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// into the table may be costly. If this cost ends up being |
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// problematic the underlying data structure can be switched to some |
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// sort of balanced binary tree. |
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GrowableArray<ciObject*>* ciObjectFactory::_shared_ci_objects = NULL; |
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ciSymbol* ciObjectFactory::_shared_ci_symbols[vmSymbols::SID_LIMIT]; |
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int ciObjectFactory::_shared_ident_limit = 0; |
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volatile bool ciObjectFactory::_initialized = false; |
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// ------------------------------------------------------------------ |
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// ciObjectFactory::ciObjectFactory |
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ciObjectFactory::ciObjectFactory(Arena* arena, |
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int expected_size) { |
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for (int i = 0; i < NON_PERM_BUCKETS; i++) { |
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_non_perm_bucket[i] = NULL; |
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} |
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_non_perm_count = 0; |
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_next_ident = _shared_ident_limit; |
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_arena = arena; |
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_ci_objects = new (arena) GrowableArray<ciObject*>(arena, expected_size, 0, NULL); |
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// If the shared ci objects exist append them to this factory's objects |
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if (_shared_ci_objects != NULL) { |
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_ci_objects->appendAll(_shared_ci_objects); |
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} |
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_unloaded_methods = new (arena) GrowableArray<ciMethod*>(arena, 4, 0, NULL); |
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_unloaded_klasses = new (arena) GrowableArray<ciKlass*>(arena, 8, 0, NULL); |
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_unloaded_instances = new (arena) GrowableArray<ciInstance*>(arena, 4, 0, NULL); |
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_return_addresses = |
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new (arena) GrowableArray<ciReturnAddress*>(arena, 8, 0, NULL); |
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_symbols = new (arena) GrowableArray<ciSymbol*>(arena, 100, 0, NULL); |
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} |
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// ------------------------------------------------------------------ |
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// ciObjectFactory::ciObjectFactory |
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void ciObjectFactory::initialize() { |
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ASSERT_IN_VM; |
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JavaThread* thread = JavaThread::current(); |
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HandleMark handle_mark(thread); |
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// This Arena is long lived and exists in the resource mark of the |
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// compiler thread that initializes the initial ciObjectFactory which |
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// creates the shared ciObjects that all later ciObjectFactories use. |
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Arena* arena = new (mtCompiler) Arena(); |
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ciEnv initial(arena); |
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ciEnv* env = ciEnv::current(); |
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env->_factory->init_shared_objects(); |
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_initialized = true; |
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} |
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void ciObjectFactory::init_shared_objects() { |
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_next_ident = 1; // start numbering CI objects at 1 |
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{ |
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// Create the shared symbols, but not in _shared_ci_objects. |
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int i; |
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for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { |
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Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i); |
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assert(vmSymbols::find_sid(vmsym) == i, "1-1 mapping"); |
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ciSymbol* sym = new (_arena) ciSymbol(vmsym, (vmSymbols::SID) i); |
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init_ident_of(sym); |
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_shared_ci_symbols[i] = sym; |
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} |
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#ifdef ASSERT |
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for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { |
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Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i); |
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ciSymbol* sym = vm_symbol_at((vmSymbols::SID) i); |
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assert(sym->get_symbol() == vmsym, "oop must match"); |
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} |
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assert(ciSymbol::void_class_signature()->get_symbol() == vmSymbols::void_class_signature(), "spot check"); |
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#endif |
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} |
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_ci_objects = new (_arena) GrowableArray<ciObject*>(_arena, 64, 0, NULL); |
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for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) { |
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BasicType t = (BasicType)i; |
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if (type2name(t) != NULL && t != T_OBJECT && t != T_ARRAY && t != T_NARROWOOP) { |
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ciType::_basic_types[t] = new (_arena) ciType(t); |
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init_ident_of(ciType::_basic_types[t]); |
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} |
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} |
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ciEnv::_null_object_instance = new (_arena) ciNullObject(); |
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init_ident_of(ciEnv::_null_object_instance); |
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ciEnv::_method_klass_instance = |
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get(Universe::methodKlassObj())->as_method_klass(); |
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ciEnv::_klass_klass_instance = |
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get(Universe::klassKlassObj())->as_klass_klass(); |
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ciEnv::_instance_klass_klass_instance = |
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get(Universe::instanceKlassKlassObj()) |
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->as_instance_klass_klass(); |
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ciEnv::_type_array_klass_klass_instance = |
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get(Universe::typeArrayKlassKlassObj()) |
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->as_type_array_klass_klass(); |
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ciEnv::_obj_array_klass_klass_instance = |
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get(Universe::objArrayKlassKlassObj()) |
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->as_obj_array_klass_klass(); |
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#define WK_KLASS_DEFN(name, ignore_s, opt) \ |
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if (SystemDictionary::name() != NULL) \ |
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ciEnv::_##name = get(SystemDictionary::name())->as_instance_klass(); |
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WK_KLASSES_DO(WK_KLASS_DEFN) |
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#undef WK_KLASS_DEFN |
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for (int len = -1; len != _ci_objects->length(); ) { |
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len = _ci_objects->length(); |
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for (int i2 = 0; i2 < len; i2++) { |
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ciObject* obj = _ci_objects->at(i2); |
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if (obj->is_loaded() && obj->is_instance_klass()) { |
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obj->as_instance_klass()->compute_nonstatic_fields(); |
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} |
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} |
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} |
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ciEnv::_unloaded_cisymbol = ciObjectFactory::get_symbol(vmSymbols::dummy_symbol()); |
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// Create dummy instanceKlass and objArrayKlass object and assign them idents |
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ciEnv::_unloaded_ciinstance_klass = new (_arena) ciInstanceKlass(ciEnv::_unloaded_cisymbol, NULL, NULL); |
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init_ident_of(ciEnv::_unloaded_ciinstance_klass); |
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ciEnv::_unloaded_ciobjarrayklass = new (_arena) ciObjArrayKlass(ciEnv::_unloaded_cisymbol, ciEnv::_unloaded_ciinstance_klass, 1); |
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init_ident_of(ciEnv::_unloaded_ciobjarrayklass); |
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assert(ciEnv::_unloaded_ciobjarrayklass->is_obj_array_klass(), "just checking"); |
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get(Universe::boolArrayKlassObj()); |
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get(Universe::charArrayKlassObj()); |
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get(Universe::singleArrayKlassObj()); |
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get(Universe::doubleArrayKlassObj()); |
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get(Universe::byteArrayKlassObj()); |
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get(Universe::shortArrayKlassObj()); |
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get(Universe::intArrayKlassObj()); |
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get(Universe::longArrayKlassObj()); |
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assert(_non_perm_count == 0, "no shared non-perm objects"); |
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// The shared_ident_limit is the first ident number that will |
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// be used for non-shared objects. That is, numbers less than |
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// this limit are permanently assigned to shared CI objects, |
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// while the higher numbers are recycled afresh by each new ciEnv. |
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_shared_ident_limit = _next_ident; |
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_shared_ci_objects = _ci_objects; |
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} |
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ciSymbol* ciObjectFactory::get_symbol(Symbol* key) { |
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vmSymbols::SID sid = vmSymbols::find_sid(key); |
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if (sid != vmSymbols::NO_SID) { |
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// do not pollute the main cache with it |
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return vm_symbol_at(sid); |
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} |
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assert(vmSymbols::find_sid(key) == vmSymbols::NO_SID, ""); |
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ciSymbol* s = new (arena()) ciSymbol(key, vmSymbols::NO_SID); |
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_symbols->push(s); |
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return s; |
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} |
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// Decrement the refcount when done on symbols referenced by this compilation. |
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void ciObjectFactory::remove_symbols() { |
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for (int i = 0; i < _symbols->length(); i++) { |
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ciSymbol* s = _symbols->at(i); |
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s->get_symbol()->decrement_refcount(); |
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} |
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// Since _symbols is resource allocated we're not allowed to delete it |
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// but it'll go away just the same. |
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} |
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// ------------------------------------------------------------------ |
246 |
// ciObjectFactory::get |
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// |
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// Get the ciObject corresponding to some oop. If the ciObject has |
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// already been created, it is returned. Otherwise, a new ciObject |
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250 |
// is created. |
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ciObject* ciObjectFactory::get(oop key) { |
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ASSERT_IN_VM; |
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#ifdef ASSERT |
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if (CIObjectFactoryVerify) { |
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oop last = NULL; |
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for (int j = 0; j< _ci_objects->length(); j++) { |
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oop o = _ci_objects->at(j)->get_oop(); |
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assert(last < o, "out of order"); |
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last = o; |
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} |
1 | 262 |
} |
263 |
#endif // ASSERT |
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264 |
int len = _ci_objects->length(); |
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265 |
int index = find(key, _ci_objects); |
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#ifdef ASSERT |
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if (CIObjectFactoryVerify) { |
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for (int i=0; i<_ci_objects->length(); i++) { |
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if (_ci_objects->at(i)->get_oop() == key) { |
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assert(index == i, " bad lookup"); |
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} |
1 | 272 |
} |
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} |
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#endif |
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275 |
if (!is_found_at(index, key, _ci_objects)) { |
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276 |
// Check in the non-perm area before putting it in the list. |
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277 |
NonPermObject* &bucket = find_non_perm(key); |
|
278 |
if (bucket != NULL) { |
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279 |
return bucket->object(); |
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280 |
} |
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282 |
// The ciObject does not yet exist. Create it and insert it |
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283 |
// into the cache. |
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284 |
Handle keyHandle(key); |
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285 |
ciObject* new_object = create_new_object(keyHandle()); |
|
286 |
assert(keyHandle() == new_object->get_oop(), "must be properly recorded"); |
|
287 |
init_ident_of(new_object); |
|
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288 |
if (!new_object->is_perm()) { |
1 | 289 |
// Not a perm-space object. |
290 |
insert_non_perm(bucket, keyHandle(), new_object); |
|
291 |
return new_object; |
|
292 |
} |
|
293 |
if (len != _ci_objects->length()) { |
|
294 |
// creating the new object has recursively entered new objects |
|
295 |
// into the table. We need to recompute our index. |
|
296 |
index = find(keyHandle(), _ci_objects); |
|
297 |
} |
|
298 |
assert(!is_found_at(index, keyHandle(), _ci_objects), "no double insert"); |
|
299 |
insert(index, new_object, _ci_objects); |
|
300 |
return new_object; |
|
301 |
} |
|
302 |
return _ci_objects->at(index); |
|
303 |
} |
|
304 |
||
305 |
// ------------------------------------------------------------------ |
|
306 |
// ciObjectFactory::create_new_object |
|
307 |
// |
|
308 |
// Create a new ciObject from an oop. |
|
309 |
// |
|
310 |
// Implementation note: this functionality could be virtual behavior |
|
311 |
// of the oop itself. For now, we explicitly marshal the object. |
|
312 |
ciObject* ciObjectFactory::create_new_object(oop o) { |
|
313 |
EXCEPTION_CONTEXT; |
|
314 |
||
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|
315 |
if (o->is_klass()) { |
1 | 316 |
KlassHandle h_k(THREAD, (klassOop)o); |
317 |
Klass* k = ((klassOop)o)->klass_part(); |
|
318 |
if (k->oop_is_instance()) { |
|
319 |
return new (arena()) ciInstanceKlass(h_k); |
|
320 |
} else if (k->oop_is_objArray()) { |
|
321 |
return new (arena()) ciObjArrayKlass(h_k); |
|
322 |
} else if (k->oop_is_typeArray()) { |
|
323 |
return new (arena()) ciTypeArrayKlass(h_k); |
|
324 |
} else if (k->oop_is_method()) { |
|
325 |
return new (arena()) ciMethodKlass(h_k); |
|
326 |
} else if (k->oop_is_klass()) { |
|
327 |
if (k->oop_is_objArrayKlass()) { |
|
328 |
return new (arena()) ciObjArrayKlassKlass(h_k); |
|
329 |
} else if (k->oop_is_typeArrayKlass()) { |
|
330 |
return new (arena()) ciTypeArrayKlassKlass(h_k); |
|
331 |
} else if (k->oop_is_instanceKlass()) { |
|
332 |
return new (arena()) ciInstanceKlassKlass(h_k); |
|
333 |
} else { |
|
334 |
assert(o == Universe::klassKlassObj(), "bad klassKlass"); |
|
335 |
return new (arena()) ciKlassKlass(h_k); |
|
336 |
} |
|
337 |
} |
|
338 |
} else if (o->is_method()) { |
|
339 |
methodHandle h_m(THREAD, (methodOop)o); |
|
340 |
return new (arena()) ciMethod(h_m); |
|
341 |
} else if (o->is_methodData()) { |
|
342 |
methodDataHandle h_md(THREAD, (methodDataOop)o); |
|
343 |
return new (arena()) ciMethodData(h_md); |
|
344 |
} else if (o->is_instance()) { |
|
345 |
instanceHandle h_i(THREAD, (instanceOop)o); |
|
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|
346 |
if (java_lang_invoke_CallSite::is_instance(o)) |
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|
347 |
return new (arena()) ciCallSite(h_i); |
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|
348 |
else if (java_lang_invoke_MemberName::is_instance(o)) |
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|
349 |
return new (arena()) ciMemberName(h_i); |
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|
350 |
else if (java_lang_invoke_MethodHandle::is_instance(o)) |
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|
351 |
return new (arena()) ciMethodHandle(h_i); |
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|
352 |
else |
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|
353 |
return new (arena()) ciInstance(h_i); |
1 | 354 |
} else if (o->is_objArray()) { |
355 |
objArrayHandle h_oa(THREAD, (objArrayOop)o); |
|
356 |
return new (arena()) ciObjArray(h_oa); |
|
357 |
} else if (o->is_typeArray()) { |
|
358 |
typeArrayHandle h_ta(THREAD, (typeArrayOop)o); |
|
359 |
return new (arena()) ciTypeArray(h_ta); |
|
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|
360 |
} else if (o->is_constantPoolCache()) { |
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|
361 |
constantPoolCacheHandle h_cpc(THREAD, (constantPoolCacheOop) o); |
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|
362 |
return new (arena()) ciCPCache(h_cpc); |
1 | 363 |
} |
364 |
||
365 |
// The oop is of some type not supported by the compiler interface. |
|
366 |
ShouldNotReachHere(); |
|
367 |
return NULL; |
|
368 |
} |
|
369 |
||
370 |
//------------------------------------------------------------------ |
|
371 |
// ciObjectFactory::get_unloaded_method |
|
372 |
// |
|
373 |
// Get the ciMethod representing an unloaded/unfound method. |
|
374 |
// |
|
375 |
// Implementation note: unloaded methods are currently stored in |
|
376 |
// an unordered array, requiring a linear-time lookup for each |
|
377 |
// unloaded method. This may need to change. |
|
378 |
ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder, |
|
379 |
ciSymbol* name, |
|
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|
380 |
ciSymbol* signature, |
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|
381 |
ciInstanceKlass* accessor) { |
065435337883
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|
382 |
ciSignature* that = NULL; |
065435337883
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|
383 |
for (int i = 0; i < _unloaded_methods->length(); i++) { |
1 | 384 |
ciMethod* entry = _unloaded_methods->at(i); |
385 |
if (entry->holder()->equals(holder) && |
|
386 |
entry->name()->equals(name) && |
|
387 |
entry->signature()->as_symbol()->equals(signature)) { |
|
10734
065435337883
7092712: JSR 292: unloaded invokedynamic call sites can lead to a crash with signature types not on BCP
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diff
changeset
|
388 |
// Short-circuit slow resolve. |
065435337883
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8725
diff
changeset
|
389 |
if (entry->signature()->accessing_klass() == accessor) { |
065435337883
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twisti
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diff
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|
390 |
// We've found a match. |
065435337883
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|
391 |
return entry; |
065435337883
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changeset
|
392 |
} else { |
065435337883
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|
393 |
// Lazily create ciSignature |
065435337883
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diff
changeset
|
394 |
if (that == NULL) that = new (arena()) ciSignature(accessor, constantPoolHandle(), signature); |
065435337883
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twisti
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changeset
|
395 |
if (entry->signature()->equals(that)) { |
065435337883
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changeset
|
396 |
// We've found a match. |
065435337883
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8725
diff
changeset
|
397 |
return entry; |
065435337883
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8725
diff
changeset
|
398 |
} |
065435337883
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changeset
|
399 |
} |
1 | 400 |
} |
401 |
} |
|
402 |
||
403 |
// This is a new unloaded method. Create it and stick it in |
|
404 |
// the cache. |
|
10734
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twisti
parents:
8725
diff
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|
405 |
ciMethod* new_method = new (arena()) ciMethod(holder, name, signature, accessor); |
1 | 406 |
|
407 |
init_ident_of(new_method); |
|
408 |
_unloaded_methods->append(new_method); |
|
409 |
||
410 |
return new_method; |
|
411 |
} |
|
412 |
||
413 |
//------------------------------------------------------------------ |
|
414 |
// ciObjectFactory::get_unloaded_klass |
|
415 |
// |
|
416 |
// Get a ciKlass representing an unloaded klass. |
|
417 |
// |
|
418 |
// Implementation note: unloaded klasses are currently stored in |
|
419 |
// an unordered array, requiring a linear-time lookup for each |
|
420 |
// unloaded klass. This may need to change. |
|
421 |
ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass, |
|
422 |
ciSymbol* name, |
|
423 |
bool create_if_not_found) { |
|
424 |
EXCEPTION_CONTEXT; |
|
425 |
oop loader = NULL; |
|
426 |
oop domain = NULL; |
|
427 |
if (accessing_klass != NULL) { |
|
428 |
loader = accessing_klass->loader(); |
|
429 |
domain = accessing_klass->protection_domain(); |
|
430 |
} |
|
431 |
for (int i=0; i<_unloaded_klasses->length(); i++) { |
|
432 |
ciKlass* entry = _unloaded_klasses->at(i); |
|
433 |
if (entry->name()->equals(name) && |
|
434 |
entry->loader() == loader && |
|
435 |
entry->protection_domain() == domain) { |
|
436 |
// We've found a match. |
|
437 |
return entry; |
|
438 |
} |
|
439 |
} |
|
440 |
||
441 |
if (!create_if_not_found) |
|
442 |
return NULL; |
|
443 |
||
444 |
// This is a new unloaded klass. Create it and stick it in |
|
445 |
// the cache. |
|
446 |
ciKlass* new_klass = NULL; |
|
447 |
||
448 |
// Two cases: this is an unloaded objArrayKlass or an |
|
449 |
// unloaded instanceKlass. Deal with both. |
|
450 |
if (name->byte_at(0) == '[') { |
|
451 |
// Decompose the name.' |
|
8076
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coleenp
parents:
7397
diff
changeset
|
452 |
FieldArrayInfo fd; |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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7397
diff
changeset
|
453 |
BasicType element_type = FieldType::get_array_info(name->get_symbol(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
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|
454 |
fd, THREAD); |
1 | 455 |
if (HAS_PENDING_EXCEPTION) { |
456 |
CLEAR_PENDING_EXCEPTION; |
|
457 |
CURRENT_THREAD_ENV->record_out_of_memory_failure(); |
|
458 |
return ciEnv::_unloaded_ciobjarrayklass; |
|
459 |
} |
|
8076
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coleenp
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diff
changeset
|
460 |
int dimension = fd.dimension(); |
1 | 461 |
assert(element_type != T_ARRAY, "unsuccessful decomposition"); |
462 |
ciKlass* element_klass = NULL; |
|
463 |
if (element_type == T_OBJECT) { |
|
464 |
ciEnv *env = CURRENT_THREAD_ENV; |
|
8076
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coleenp
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7397
diff
changeset
|
465 |
ciSymbol* ci_name = env->get_symbol(fd.object_key()); |
1 | 466 |
element_klass = |
467 |
env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass(); |
|
468 |
} else { |
|
469 |
assert(dimension > 1, "one dimensional type arrays are always loaded."); |
|
470 |
||
471 |
// The type array itself takes care of one of the dimensions. |
|
472 |
dimension--; |
|
473 |
||
474 |
// The element klass is a typeArrayKlass. |
|
475 |
element_klass = ciTypeArrayKlass::make(element_type); |
|
476 |
} |
|
477 |
new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension); |
|
478 |
} else { |
|
479 |
jobject loader_handle = NULL; |
|
480 |
jobject domain_handle = NULL; |
|
481 |
if (accessing_klass != NULL) { |
|
482 |
loader_handle = accessing_klass->loader_handle(); |
|
483 |
domain_handle = accessing_klass->protection_domain_handle(); |
|
484 |
} |
|
485 |
new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle); |
|
486 |
} |
|
487 |
init_ident_of(new_klass); |
|
488 |
_unloaded_klasses->append(new_klass); |
|
489 |
||
490 |
return new_klass; |
|
491 |
} |
|
492 |
||
5882 | 493 |
|
494 |
//------------------------------------------------------------------ |
|
495 |
// ciObjectFactory::get_unloaded_instance |
|
496 |
// |
|
497 |
// Get a ciInstance representing an as-yet undetermined instance of a given class. |
|
498 |
// |
|
499 |
ciInstance* ciObjectFactory::get_unloaded_instance(ciInstanceKlass* instance_klass) { |
|
500 |
for (int i=0; i<_unloaded_instances->length(); i++) { |
|
501 |
ciInstance* entry = _unloaded_instances->at(i); |
|
502 |
if (entry->klass()->equals(instance_klass)) { |
|
503 |
// We've found a match. |
|
504 |
return entry; |
|
505 |
} |
|
506 |
} |
|
507 |
||
508 |
// This is a new unloaded instance. Create it and stick it in |
|
509 |
// the cache. |
|
510 |
ciInstance* new_instance = new (arena()) ciInstance(instance_klass); |
|
511 |
||
512 |
init_ident_of(new_instance); |
|
513 |
_unloaded_instances->append(new_instance); |
|
514 |
||
515 |
// make sure it looks the way we want: |
|
516 |
assert(!new_instance->is_loaded(), ""); |
|
517 |
assert(new_instance->klass() == instance_klass, ""); |
|
518 |
||
519 |
return new_instance; |
|
520 |
} |
|
521 |
||
522 |
||
523 |
//------------------------------------------------------------------ |
|
524 |
// ciObjectFactory::get_unloaded_klass_mirror |
|
525 |
// |
|
526 |
// Get a ciInstance representing an unresolved klass mirror. |
|
527 |
// |
|
528 |
// Currently, this ignores the parameters and returns a unique unloaded instance. |
|
529 |
ciInstance* ciObjectFactory::get_unloaded_klass_mirror(ciKlass* type) { |
|
530 |
assert(ciEnv::_Class_klass != NULL, ""); |
|
531 |
return get_unloaded_instance(ciEnv::_Class_klass->as_instance_klass()); |
|
532 |
} |
|
533 |
||
534 |
//------------------------------------------------------------------ |
|
535 |
// ciObjectFactory::get_unloaded_method_handle_constant |
|
536 |
// |
|
537 |
// Get a ciInstance representing an unresolved method handle constant. |
|
538 |
// |
|
539 |
// Currently, this ignores the parameters and returns a unique unloaded instance. |
|
540 |
ciInstance* ciObjectFactory::get_unloaded_method_handle_constant(ciKlass* holder, |
|
541 |
ciSymbol* name, |
|
542 |
ciSymbol* signature, |
|
543 |
int ref_kind) { |
|
544 |
if (ciEnv::_MethodHandle_klass == NULL) return NULL; |
|
545 |
return get_unloaded_instance(ciEnv::_MethodHandle_klass->as_instance_klass()); |
|
546 |
} |
|
547 |
||
548 |
//------------------------------------------------------------------ |
|
549 |
// ciObjectFactory::get_unloaded_method_type_constant |
|
550 |
// |
|
551 |
// Get a ciInstance representing an unresolved method type constant. |
|
552 |
// |
|
553 |
// Currently, this ignores the parameters and returns a unique unloaded instance. |
|
554 |
ciInstance* ciObjectFactory::get_unloaded_method_type_constant(ciSymbol* signature) { |
|
555 |
if (ciEnv::_MethodType_klass == NULL) return NULL; |
|
556 |
return get_unloaded_instance(ciEnv::_MethodType_klass->as_instance_klass()); |
|
557 |
} |
|
558 |
||
559 |
||
560 |
||
1 | 561 |
//------------------------------------------------------------------ |
562 |
// ciObjectFactory::get_empty_methodData |
|
563 |
// |
|
564 |
// Get the ciMethodData representing the methodData for a method with |
|
565 |
// none. |
|
566 |
ciMethodData* ciObjectFactory::get_empty_methodData() { |
|
567 |
ciMethodData* new_methodData = new (arena()) ciMethodData(); |
|
568 |
init_ident_of(new_methodData); |
|
569 |
return new_methodData; |
|
570 |
} |
|
571 |
||
572 |
//------------------------------------------------------------------ |
|
573 |
// ciObjectFactory::get_return_address |
|
574 |
// |
|
575 |
// Get a ciReturnAddress for a specified bci. |
|
576 |
ciReturnAddress* ciObjectFactory::get_return_address(int bci) { |
|
577 |
for (int i=0; i<_return_addresses->length(); i++) { |
|
578 |
ciReturnAddress* entry = _return_addresses->at(i); |
|
579 |
if (entry->bci() == bci) { |
|
580 |
// We've found a match. |
|
581 |
return entry; |
|
582 |
} |
|
583 |
} |
|
584 |
||
585 |
ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci); |
|
586 |
init_ident_of(new_ret_addr); |
|
587 |
_return_addresses->append(new_ret_addr); |
|
588 |
return new_ret_addr; |
|
589 |
} |
|
590 |
||
591 |
// ------------------------------------------------------------------ |
|
592 |
// ciObjectFactory::init_ident_of |
|
593 |
void ciObjectFactory::init_ident_of(ciObject* obj) { |
|
594 |
obj->set_ident(_next_ident++); |
|
595 |
} |
|
596 |
||
8076
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parents:
7397
diff
changeset
|
597 |
void ciObjectFactory::init_ident_of(ciSymbol* obj) { |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
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parents:
7397
diff
changeset
|
598 |
obj->set_ident(_next_ident++); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
599 |
} |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
600 |
|
1 | 601 |
|
602 |
// ------------------------------------------------------------------ |
|
603 |
// ciObjectFactory::find |
|
604 |
// |
|
605 |
// Use binary search to find the position of this oop in the cache. |
|
606 |
// If there is no entry in the cache corresponding to this oop, return |
|
607 |
// the position at which the oop should be inserted. |
|
608 |
int ciObjectFactory::find(oop key, GrowableArray<ciObject*>* objects) { |
|
609 |
int min = 0; |
|
610 |
int max = objects->length()-1; |
|
611 |
||
612 |
// print_contents(); |
|
613 |
||
614 |
while (max >= min) { |
|
615 |
int mid = (max + min) / 2; |
|
616 |
oop value = objects->at(mid)->get_oop(); |
|
617 |
if (value < key) { |
|
618 |
min = mid + 1; |
|
619 |
} else if (value > key) { |
|
620 |
max = mid - 1; |
|
621 |
} else { |
|
622 |
return mid; |
|
623 |
} |
|
624 |
} |
|
625 |
return min; |
|
626 |
} |
|
627 |
||
628 |
// ------------------------------------------------------------------ |
|
629 |
// ciObjectFactory::is_found_at |
|
630 |
// |
|
631 |
// Verify that the binary seach found the given key. |
|
632 |
bool ciObjectFactory::is_found_at(int index, oop key, GrowableArray<ciObject*>* objects) { |
|
633 |
return (index < objects->length() && |
|
634 |
objects->at(index)->get_oop() == key); |
|
635 |
} |
|
636 |
||
637 |
||
638 |
// ------------------------------------------------------------------ |
|
639 |
// ciObjectFactory::insert |
|
640 |
// |
|
641 |
// Insert a ciObject into the table at some index. |
|
642 |
void ciObjectFactory::insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects) { |
|
643 |
int len = objects->length(); |
|
644 |
if (len == index) { |
|
645 |
objects->append(obj); |
|
646 |
} else { |
|
647 |
objects->append(objects->at(len-1)); |
|
648 |
int pos; |
|
649 |
for (pos = len-2; pos >= index; pos--) { |
|
650 |
objects->at_put(pos+1,objects->at(pos)); |
|
651 |
} |
|
652 |
objects->at_put(index, obj); |
|
653 |
} |
|
654 |
#ifdef ASSERT |
|
3609
5f16c48e608a
6866585: debug code in ciObjectFactory too slow for large objects
jcoomes
parents:
670
diff
changeset
|
655 |
if (CIObjectFactoryVerify) { |
5f16c48e608a
6866585: debug code in ciObjectFactory too slow for large objects
jcoomes
parents:
670
diff
changeset
|
656 |
oop last = NULL; |
5f16c48e608a
6866585: debug code in ciObjectFactory too slow for large objects
jcoomes
parents:
670
diff
changeset
|
657 |
for (int j = 0; j< objects->length(); j++) { |
5f16c48e608a
6866585: debug code in ciObjectFactory too slow for large objects
jcoomes
parents:
670
diff
changeset
|
658 |
oop o = objects->at(j)->get_oop(); |
5f16c48e608a
6866585: debug code in ciObjectFactory too slow for large objects
jcoomes
parents:
670
diff
changeset
|
659 |
assert(last < o, "out of order"); |
5f16c48e608a
6866585: debug code in ciObjectFactory too slow for large objects
jcoomes
parents:
670
diff
changeset
|
660 |
last = o; |
5f16c48e608a
6866585: debug code in ciObjectFactory too slow for large objects
jcoomes
parents:
670
diff
changeset
|
661 |
} |
1 | 662 |
} |
663 |
#endif // ASSERT |
|
664 |
} |
|
665 |
||
666 |
static ciObjectFactory::NonPermObject* emptyBucket = NULL; |
|
667 |
||
668 |
// ------------------------------------------------------------------ |
|
669 |
// ciObjectFactory::find_non_perm |
|
670 |
// |
|
671 |
// Use a small hash table, hashed on the klass of the key. |
|
672 |
// If there is no entry in the cache corresponding to this oop, return |
|
673 |
// the null tail of the bucket into which the oop should be inserted. |
|
674 |
ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) { |
|
675 |
// Be careful: is_perm might change from false to true. |
|
676 |
// Thus, there might be a matching perm object in the table. |
|
677 |
// If there is, this probe must find it. |
|
678 |
if (key->is_perm() && _non_perm_count == 0) { |
|
679 |
return emptyBucket; |
|
680 |
} else if (key->is_instance()) { |
|
8725
8c1e3dd5fe1b
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
8676
diff
changeset
|
681 |
if (key->klass() == SystemDictionary::Class_klass() && JavaObjectsInPerm) { |
1 | 682 |
// class mirror instances are always perm |
683 |
return emptyBucket; |
|
684 |
} |
|
685 |
// fall through to probe |
|
686 |
} else if (key->is_array()) { |
|
687 |
// fall through to probe |
|
688 |
} else { |
|
689 |
// not an array or instance |
|
690 |
return emptyBucket; |
|
691 |
} |
|
692 |
||
693 |
ciObject* klass = get(key->klass()); |
|
694 |
NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS]; |
|
695 |
for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) { |
|
696 |
if (is_equal(p, key)) break; |
|
697 |
} |
|
698 |
return (*bp); |
|
699 |
} |
|
700 |
||
701 |
||
702 |
||
703 |
// ------------------------------------------------------------------ |
|
704 |
// Code for for NonPermObject |
|
705 |
// |
|
706 |
inline ciObjectFactory::NonPermObject::NonPermObject(ciObjectFactory::NonPermObject* &bucket, oop key, ciObject* object) { |
|
707 |
assert(ciObjectFactory::is_initialized(), ""); |
|
708 |
_object = object; |
|
709 |
_next = bucket; |
|
710 |
bucket = this; |
|
711 |
} |
|
712 |
||
713 |
||
714 |
||
715 |
// ------------------------------------------------------------------ |
|
716 |
// ciObjectFactory::insert_non_perm |
|
717 |
// |
|
718 |
// Insert a ciObject into the non-perm table. |
|
719 |
void ciObjectFactory::insert_non_perm(ciObjectFactory::NonPermObject* &where, oop key, ciObject* obj) { |
|
720 |
assert(&where != &emptyBucket, "must not try to fill empty bucket"); |
|
721 |
NonPermObject* p = new (arena()) NonPermObject(where, key, obj); |
|
722 |
assert(where == p && is_equal(p, key) && p->object() == obj, "entry must match"); |
|
723 |
assert(find_non_perm(key) == p, "must find the same spot"); |
|
724 |
++_non_perm_count; |
|
725 |
} |
|
726 |
||
727 |
// ------------------------------------------------------------------ |
|
728 |
// ciObjectFactory::vm_symbol_at |
|
729 |
// Get the ciSymbol corresponding to some index in vmSymbols. |
|
730 |
ciSymbol* ciObjectFactory::vm_symbol_at(int index) { |
|
731 |
assert(index >= vmSymbols::FIRST_SID && index < vmSymbols::SID_LIMIT, "oob"); |
|
732 |
return _shared_ci_symbols[index]; |
|
733 |
} |
|
734 |
||
735 |
// ------------------------------------------------------------------ |
|
736 |
// ciObjectFactory::print_contents_impl |
|
737 |
void ciObjectFactory::print_contents_impl() { |
|
738 |
int len = _ci_objects->length(); |
|
739 |
tty->print_cr("ciObjectFactory (%d) oop contents:", len); |
|
740 |
for (int i=0; i<len; i++) { |
|
741 |
_ci_objects->at(i)->print(); |
|
742 |
tty->cr(); |
|
743 |
} |
|
744 |
} |
|
745 |
||
746 |
// ------------------------------------------------------------------ |
|
747 |
// ciObjectFactory::print_contents |
|
748 |
void ciObjectFactory::print_contents() { |
|
749 |
print(); |
|
750 |
tty->cr(); |
|
751 |
GUARDED_VM_ENTRY(print_contents_impl();) |
|
752 |
} |
|
753 |
||
754 |
// ------------------------------------------------------------------ |
|
755 |
// ciObjectFactory::print |
|
756 |
// |
|
757 |
// Print debugging information about the object factory |
|
758 |
void ciObjectFactory::print() { |
|
5882 | 759 |
tty->print("<ciObjectFactory oops=%d unloaded_methods=%d unloaded_instances=%d unloaded_klasses=%d>", |
1 | 760 |
_ci_objects->length(), _unloaded_methods->length(), |
5882 | 761 |
_unloaded_instances->length(), |
1 | 762 |
_unloaded_klasses->length()); |
763 |
} |