author | phh |
Thu, 24 Apr 2008 15:07:57 -0400 | |
changeset 380 | ec5fd25a5edf |
parent 360 | 21d113ecbf6a |
child 382 | 02c0a63f30d6 |
permissions | -rw-r--r-- |
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/* |
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* Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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* |
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*/ |
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// Implementation of all inlined member functions defined in oop.hpp |
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// We need a separate file to avoid circular references |
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inline void oopDesc::release_set_mark(markOop m) { |
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OrderAccess::release_store_ptr(&_mark, m); |
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} |
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inline markOop oopDesc::cas_set_mark(markOop new_mark, markOop old_mark) { |
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return (markOop) Atomic::cmpxchg_ptr(new_mark, &_mark, old_mark); |
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} |
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inline klassOop oopDesc::klass() const { |
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if (UseCompressedOops) { |
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return (klassOop)decode_heap_oop_not_null(_metadata._compressed_klass); |
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// can be NULL in CMS, but isn't supported on CMS yet. |
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} else { |
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return _metadata._klass; |
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} |
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} |
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inline int oopDesc::klass_gap_offset_in_bytes() { |
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assert(UseCompressedOops, "only applicable to compressed headers"); |
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return oopDesc::klass_offset_in_bytes() + sizeof(narrowOop); |
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} |
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inline oop* oopDesc::klass_addr() { |
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// Only used internally and with CMS and will not work with |
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// UseCompressedOops |
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assert(!UseCompressedOops, "only supported with uncompressed oops"); |
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return (oop*) &_metadata._klass; |
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} |
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inline narrowOop* oopDesc::compressed_klass_addr() { |
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assert(UseCompressedOops, "only called by compressed oops"); |
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return (narrowOop*) &_metadata._compressed_klass; |
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} |
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inline void oopDesc::set_klass(klassOop k) { |
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// since klasses are promoted no store check is needed |
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assert(Universe::is_bootstrapping() || k != NULL, "must be a real klassOop"); |
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assert(Universe::is_bootstrapping() || k->is_klass(), "not a klassOop"); |
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if (UseCompressedOops) { |
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// zero the gap when the klass is set, by zeroing the pointer sized |
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// part of the union. |
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_metadata._klass = NULL; |
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oop_store_without_check(compressed_klass_addr(), (oop)k); |
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} else { |
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oop_store_without_check(klass_addr(), (oop) k); |
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} |
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} |
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inline void oopDesc::set_klass_to_list_ptr(oop k) { |
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// This is only to be used during GC, for from-space objects, so no |
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// barrier is needed. |
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if (UseCompressedOops) { |
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_metadata._compressed_klass = encode_heap_oop_not_null(k); |
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} else { |
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_metadata._klass = (klassOop)k; |
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} |
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} |
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inline void oopDesc::init_mark() { set_mark(markOopDesc::prototype_for_object(this)); } |
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inline Klass* oopDesc::blueprint() const { return klass()->klass_part(); } |
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inline bool oopDesc::is_a(klassOop k) const { return blueprint()->is_subtype_of(k); } |
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inline bool oopDesc::is_instance() const { return blueprint()->oop_is_instance(); } |
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inline bool oopDesc::is_instanceRef() const { return blueprint()->oop_is_instanceRef(); } |
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inline bool oopDesc::is_array() const { return blueprint()->oop_is_array(); } |
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inline bool oopDesc::is_objArray() const { return blueprint()->oop_is_objArray(); } |
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inline bool oopDesc::is_typeArray() const { return blueprint()->oop_is_typeArray(); } |
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inline bool oopDesc::is_javaArray() const { return blueprint()->oop_is_javaArray(); } |
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inline bool oopDesc::is_symbol() const { return blueprint()->oop_is_symbol(); } |
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inline bool oopDesc::is_klass() const { return blueprint()->oop_is_klass(); } |
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inline bool oopDesc::is_thread() const { return blueprint()->oop_is_thread(); } |
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inline bool oopDesc::is_method() const { return blueprint()->oop_is_method(); } |
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inline bool oopDesc::is_constMethod() const { return blueprint()->oop_is_constMethod(); } |
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inline bool oopDesc::is_methodData() const { return blueprint()->oop_is_methodData(); } |
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inline bool oopDesc::is_constantPool() const { return blueprint()->oop_is_constantPool(); } |
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inline bool oopDesc::is_constantPoolCache() const { return blueprint()->oop_is_constantPoolCache(); } |
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inline bool oopDesc::is_compiledICHolder() const { return blueprint()->oop_is_compiledICHolder(); } |
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inline void* oopDesc::field_base(int offset) const { return (void*)&((char*)this)[offset]; } |
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template <class T> inline T* oopDesc::obj_field_addr(int offset) const { return (T*)field_base(offset); } |
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inline jbyte* oopDesc::byte_field_addr(int offset) const { return (jbyte*) field_base(offset); } |
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inline jchar* oopDesc::char_field_addr(int offset) const { return (jchar*) field_base(offset); } |
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inline jboolean* oopDesc::bool_field_addr(int offset) const { return (jboolean*)field_base(offset); } |
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inline jint* oopDesc::int_field_addr(int offset) const { return (jint*) field_base(offset); } |
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inline jshort* oopDesc::short_field_addr(int offset) const { return (jshort*) field_base(offset); } |
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inline jlong* oopDesc::long_field_addr(int offset) const { return (jlong*) field_base(offset); } |
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inline jfloat* oopDesc::float_field_addr(int offset) const { return (jfloat*) field_base(offset); } |
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inline jdouble* oopDesc::double_field_addr(int offset) const { return (jdouble*) field_base(offset); } |
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inline address* oopDesc::address_field_addr(int offset) const { return (address*) field_base(offset); } |
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// Functions for getting and setting oops within instance objects. |
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// If the oops are compressed, the type passed to these overloaded functions |
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// is narrowOop. All functions are overloaded so they can be called by |
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// template functions without conditionals (the compiler instantiates via |
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// the right type and inlines the appopriate code). |
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inline bool oopDesc::is_null(oop obj) { return obj == NULL; } |
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inline bool oopDesc::is_null(narrowOop obj) { return obj == 0; } |
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// Algorithm for encoding and decoding oops from 64 bit pointers to 32 bit |
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// offset from the heap base. Saving the check for null can save instructions |
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// in inner GC loops so these are separated. |
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inline narrowOop oopDesc::encode_heap_oop_not_null(oop v) { |
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assert(!is_null(v), "oop value can never be zero"); |
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address heap_base = Universe::heap_base(); |
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uint64_t result = (uint64_t)(pointer_delta((void*)v, (void*)heap_base, 1) >> LogMinObjAlignmentInBytes); |
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assert((result & 0xffffffff00000000ULL) == 0, "narrow oop overflow"); |
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return (narrowOop)result; |
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} |
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inline narrowOop oopDesc::encode_heap_oop(oop v) { |
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return (is_null(v)) ? (narrowOop)0 : encode_heap_oop_not_null(v); |
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} |
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inline oop oopDesc::decode_heap_oop_not_null(narrowOop v) { |
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assert(!is_null(v), "narrow oop value can never be zero"); |
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address heap_base = Universe::heap_base(); |
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return (oop)(void*)((uintptr_t)heap_base + ((uintptr_t)v << LogMinObjAlignmentInBytes)); |
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} |
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inline oop oopDesc::decode_heap_oop(narrowOop v) { |
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return is_null(v) ? (oop)NULL : decode_heap_oop_not_null(v); |
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} |
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inline oop oopDesc::decode_heap_oop_not_null(oop v) { return v; } |
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inline oop oopDesc::decode_heap_oop(oop v) { return v; } |
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// Load an oop out of the Java heap as is without decoding. |
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// Called by GC to check for null before decoding. |
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inline oop oopDesc::load_heap_oop(oop* p) { return *p; } |
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inline narrowOop oopDesc::load_heap_oop(narrowOop* p) { return *p; } |
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// Load and decode an oop out of the Java heap into a wide oop. |
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inline oop oopDesc::load_decode_heap_oop_not_null(oop* p) { return *p; } |
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inline oop oopDesc::load_decode_heap_oop_not_null(narrowOop* p) { |
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return decode_heap_oop_not_null(*p); |
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} |
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// Load and decode an oop out of the heap accepting null |
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inline oop oopDesc::load_decode_heap_oop(oop* p) { return *p; } |
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inline oop oopDesc::load_decode_heap_oop(narrowOop* p) { |
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return decode_heap_oop(*p); |
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} |
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// Store already encoded heap oop into the heap. |
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inline void oopDesc::store_heap_oop(oop* p, oop v) { *p = v; } |
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inline void oopDesc::store_heap_oop(narrowOop* p, narrowOop v) { *p = v; } |
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// Encode and store a heap oop. |
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inline void oopDesc::encode_store_heap_oop_not_null(narrowOop* p, oop v) { |
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*p = encode_heap_oop_not_null(v); |
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} |
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inline void oopDesc::encode_store_heap_oop_not_null(oop* p, oop v) { *p = v; } |
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// Encode and store a heap oop allowing for null. |
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inline void oopDesc::encode_store_heap_oop(narrowOop* p, oop v) { |
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*p = encode_heap_oop(v); |
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} |
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inline void oopDesc::encode_store_heap_oop(oop* p, oop v) { *p = v; } |
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// Store heap oop as is for volatile fields. |
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inline void oopDesc::release_store_heap_oop(volatile oop* p, oop v) { |
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OrderAccess::release_store_ptr(p, v); |
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} |
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inline void oopDesc::release_store_heap_oop(volatile narrowOop* p, |
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narrowOop v) { |
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OrderAccess::release_store(p, v); |
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} |
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inline void oopDesc::release_encode_store_heap_oop_not_null( |
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volatile narrowOop* p, oop v) { |
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// heap oop is not pointer sized. |
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OrderAccess::release_store(p, encode_heap_oop_not_null(v)); |
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} |
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inline void oopDesc::release_encode_store_heap_oop_not_null( |
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volatile oop* p, oop v) { |
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OrderAccess::release_store_ptr(p, v); |
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} |
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inline void oopDesc::release_encode_store_heap_oop(volatile oop* p, |
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oop v) { |
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OrderAccess::release_store_ptr(p, v); |
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} |
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inline void oopDesc::release_encode_store_heap_oop( |
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volatile narrowOop* p, oop v) { |
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OrderAccess::release_store(p, encode_heap_oop(v)); |
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} |
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// These functions are only used to exchange oop fields in instances, |
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// not headers. |
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inline oop oopDesc::atomic_exchange_oop(oop exchange_value, volatile HeapWord *dest) { |
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if (UseCompressedOops) { |
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// encode exchange value from oop to T |
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narrowOop val = encode_heap_oop(exchange_value); |
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narrowOop old = (narrowOop)Atomic::xchg(val, (narrowOop*)dest); |
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// decode old from T to oop |
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return decode_heap_oop(old); |
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} else { |
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return (oop)Atomic::xchg_ptr(exchange_value, (oop*)dest); |
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} |
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234 |
} |
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235 |
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inline oop oopDesc::atomic_compare_exchange_oop(oop exchange_value, |
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volatile HeapWord *dest, |
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oop compare_value) { |
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if (UseCompressedOops) { |
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// encode exchange and compare value from oop to T |
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narrowOop val = encode_heap_oop(exchange_value); |
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narrowOop cmp = encode_heap_oop(compare_value); |
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|
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narrowOop old = (narrowOop) Atomic::cmpxchg(val, (narrowOop*)dest, cmp); |
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// decode old from T to oop |
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return decode_heap_oop(old); |
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} else { |
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return (oop)Atomic::cmpxchg_ptr(exchange_value, (oop*)dest, compare_value); |
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} |
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} |
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// In order to put or get a field out of an instance, must first check |
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// if the field has been compressed and uncompress it. |
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inline oop oopDesc::obj_field(int offset) const { |
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return UseCompressedOops ? |
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load_decode_heap_oop(obj_field_addr<narrowOop>(offset)) : |
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load_decode_heap_oop(obj_field_addr<oop>(offset)); |
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} |
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inline void oopDesc::obj_field_put(int offset, oop value) { |
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UseCompressedOops ? oop_store(obj_field_addr<narrowOop>(offset), value) : |
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oop_store(obj_field_addr<oop>(offset), value); |
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} |
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inline void oopDesc::obj_field_raw_put(int offset, oop value) { |
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UseCompressedOops ? |
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encode_store_heap_oop(obj_field_addr<narrowOop>(offset), value) : |
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encode_store_heap_oop(obj_field_addr<oop>(offset), value); |
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} |
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269 |
inline jbyte oopDesc::byte_field(int offset) const { return (jbyte) *byte_field_addr(offset); } |
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270 |
inline void oopDesc::byte_field_put(int offset, jbyte contents) { *byte_field_addr(offset) = (jint) contents; } |
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||
272 |
inline jboolean oopDesc::bool_field(int offset) const { return (jboolean) *bool_field_addr(offset); } |
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273 |
inline void oopDesc::bool_field_put(int offset, jboolean contents) { *bool_field_addr(offset) = (jint) contents; } |
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275 |
inline jchar oopDesc::char_field(int offset) const { return (jchar) *char_field_addr(offset); } |
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inline void oopDesc::char_field_put(int offset, jchar contents) { *char_field_addr(offset) = (jint) contents; } |
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278 |
inline jint oopDesc::int_field(int offset) const { return *int_field_addr(offset); } |
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inline void oopDesc::int_field_put(int offset, jint contents) { *int_field_addr(offset) = contents; } |
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280 |
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281 |
inline jshort oopDesc::short_field(int offset) const { return (jshort) *short_field_addr(offset); } |
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282 |
inline void oopDesc::short_field_put(int offset, jshort contents) { *short_field_addr(offset) = (jint) contents;} |
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283 |
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284 |
inline jlong oopDesc::long_field(int offset) const { return *long_field_addr(offset); } |
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inline void oopDesc::long_field_put(int offset, jlong contents) { *long_field_addr(offset) = contents; } |
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287 |
inline jfloat oopDesc::float_field(int offset) const { return *float_field_addr(offset); } |
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288 |
inline void oopDesc::float_field_put(int offset, jfloat contents) { *float_field_addr(offset) = contents; } |
|
289 |
||
290 |
inline jdouble oopDesc::double_field(int offset) const { return *double_field_addr(offset); } |
|
291 |
inline void oopDesc::double_field_put(int offset, jdouble contents) { *double_field_addr(offset) = contents; } |
|
292 |
||
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inline address oopDesc::address_field(int offset) const { return *address_field_addr(offset); } |
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inline void oopDesc::address_field_put(int offset, address contents) { *address_field_addr(offset) = contents; } |
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295 |
|
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inline oop oopDesc::obj_field_acquire(int offset) const { |
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return UseCompressedOops ? |
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298 |
decode_heap_oop((narrowOop) |
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OrderAccess::load_acquire(obj_field_addr<narrowOop>(offset))) |
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: decode_heap_oop((oop) |
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OrderAccess::load_ptr_acquire(obj_field_addr<oop>(offset))); |
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} |
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inline void oopDesc::release_obj_field_put(int offset, oop value) { |
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UseCompressedOops ? |
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oop_store((volatile narrowOop*)obj_field_addr<narrowOop>(offset), value) : |
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oop_store((volatile oop*) obj_field_addr<oop>(offset), value); |
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307 |
} |
1 | 308 |
|
309 |
inline jbyte oopDesc::byte_field_acquire(int offset) const { return OrderAccess::load_acquire(byte_field_addr(offset)); } |
|
310 |
inline void oopDesc::release_byte_field_put(int offset, jbyte contents) { OrderAccess::release_store(byte_field_addr(offset), contents); } |
|
311 |
||
312 |
inline jboolean oopDesc::bool_field_acquire(int offset) const { return OrderAccess::load_acquire(bool_field_addr(offset)); } |
|
313 |
inline void oopDesc::release_bool_field_put(int offset, jboolean contents) { OrderAccess::release_store(bool_field_addr(offset), contents); } |
|
314 |
||
315 |
inline jchar oopDesc::char_field_acquire(int offset) const { return OrderAccess::load_acquire(char_field_addr(offset)); } |
|
316 |
inline void oopDesc::release_char_field_put(int offset, jchar contents) { OrderAccess::release_store(char_field_addr(offset), contents); } |
|
317 |
||
318 |
inline jint oopDesc::int_field_acquire(int offset) const { return OrderAccess::load_acquire(int_field_addr(offset)); } |
|
319 |
inline void oopDesc::release_int_field_put(int offset, jint contents) { OrderAccess::release_store(int_field_addr(offset), contents); } |
|
320 |
||
321 |
inline jshort oopDesc::short_field_acquire(int offset) const { return (jshort)OrderAccess::load_acquire(short_field_addr(offset)); } |
|
322 |
inline void oopDesc::release_short_field_put(int offset, jshort contents) { OrderAccess::release_store(short_field_addr(offset), contents); } |
|
323 |
||
324 |
inline jlong oopDesc::long_field_acquire(int offset) const { return OrderAccess::load_acquire(long_field_addr(offset)); } |
|
325 |
inline void oopDesc::release_long_field_put(int offset, jlong contents) { OrderAccess::release_store(long_field_addr(offset), contents); } |
|
326 |
||
327 |
inline jfloat oopDesc::float_field_acquire(int offset) const { return OrderAccess::load_acquire(float_field_addr(offset)); } |
|
328 |
inline void oopDesc::release_float_field_put(int offset, jfloat contents) { OrderAccess::release_store(float_field_addr(offset), contents); } |
|
329 |
||
330 |
inline jdouble oopDesc::double_field_acquire(int offset) const { return OrderAccess::load_acquire(double_field_addr(offset)); } |
|
331 |
inline void oopDesc::release_double_field_put(int offset, jdouble contents) { OrderAccess::release_store(double_field_addr(offset), contents); } |
|
332 |
||
333 |
inline int oopDesc::size_given_klass(Klass* klass) { |
|
334 |
int lh = klass->layout_helper(); |
|
335 |
int s = lh >> LogHeapWordSize; // deliver size scaled by wordSize |
|
336 |
||
337 |
// lh is now a value computed at class initialization that may hint |
|
338 |
// at the size. For instances, this is positive and equal to the |
|
339 |
// size. For arrays, this is negative and provides log2 of the |
|
340 |
// array element size. For other oops, it is zero and thus requires |
|
341 |
// a virtual call. |
|
342 |
// |
|
343 |
// We go to all this trouble because the size computation is at the |
|
344 |
// heart of phase 2 of mark-compaction, and called for every object, |
|
345 |
// alive or dead. So the speed here is equal in importance to the |
|
346 |
// speed of allocation. |
|
347 |
||
348 |
if (lh <= Klass::_lh_neutral_value) { |
|
349 |
// The most common case is instances; fall through if so. |
|
350 |
if (lh < Klass::_lh_neutral_value) { |
|
351 |
// Second most common case is arrays. We have to fetch the |
|
352 |
// length of the array, shift (multiply) it appropriately, |
|
353 |
// up to wordSize, add the header, and align to object size. |
|
354 |
size_t size_in_bytes; |
|
355 |
#ifdef _M_IA64 |
|
356 |
// The Windows Itanium Aug 2002 SDK hoists this load above |
|
357 |
// the check for s < 0. An oop at the end of the heap will |
|
358 |
// cause an access violation if this load is performed on a non |
|
359 |
// array oop. Making the reference volatile prohibits this. |
|
360 |
// (%%% please explain by what magic the length is actually fetched!) |
|
361 |
volatile int *array_length; |
|
362 |
array_length = (volatile int *)( (intptr_t)this + |
|
363 |
arrayOopDesc::length_offset_in_bytes() ); |
|
364 |
assert(array_length > 0, "Integer arithmetic problem somewhere"); |
|
365 |
// Put into size_t to avoid overflow. |
|
366 |
size_in_bytes = (size_t) array_length; |
|
367 |
size_in_bytes = size_in_bytes << Klass::layout_helper_log2_element_size(lh); |
|
368 |
#else |
|
369 |
size_t array_length = (size_t) ((arrayOop)this)->length(); |
|
370 |
size_in_bytes = array_length << Klass::layout_helper_log2_element_size(lh); |
|
371 |
#endif |
|
372 |
size_in_bytes += Klass::layout_helper_header_size(lh); |
|
373 |
||
374 |
// This code could be simplified, but by keeping array_header_in_bytes |
|
375 |
// in units of bytes and doing it this way we can round up just once, |
|
376 |
// skipping the intermediate round to HeapWordSize. Cast the result |
|
377 |
// of round_to to size_t to guarantee unsigned division == right shift. |
|
378 |
s = (int)((size_t)round_to(size_in_bytes, MinObjAlignmentInBytes) / |
|
379 |
HeapWordSize); |
|
380 |
||
381 |
// UseParNewGC can change the length field of an "old copy" of an object |
|
382 |
// array in the young gen so it indicates the stealable portion of |
|
383 |
// an already copied array. This will cause the first disjunct below |
|
384 |
// to fail if the sizes are computed across such a concurrent change. |
|
385 |
// UseParNewGC also runs with promotion labs (which look like int |
|
386 |
// filler arrays) which are subject to changing their declared size |
|
387 |
// when finally retiring a PLAB; this also can cause the first disjunct |
|
388 |
// to fail for another worker thread that is concurrently walking the block |
|
389 |
// offset table. Both these invariant failures are benign for their |
|
390 |
// current uses; we relax the assertion checking to cover these two cases below: |
|
391 |
// is_objArray() && is_forwarded() // covers first scenario above |
|
392 |
// || is_typeArray() // covers second scenario above |
|
393 |
// If and when UseParallelGC uses the same obj array oop stealing/chunking |
|
394 |
// technique, or when G1 is integrated (and currently uses this array chunking |
|
395 |
// technique) we will need to suitably modify the assertion. |
|
396 |
assert((s == klass->oop_size(this)) || |
|
397 |
(((UseParNewGC || UseParallelGC) && |
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398 |
Universe::heap()->is_gc_active()) && |
1 | 399 |
(is_typeArray() || |
400 |
(is_objArray() && is_forwarded()))), |
|
401 |
"wrong array object size"); |
|
402 |
} else { |
|
403 |
// Must be zero, so bite the bullet and take the virtual call. |
|
404 |
s = klass->oop_size(this); |
|
405 |
} |
|
406 |
} |
|
407 |
||
408 |
assert(s % MinObjAlignment == 0, "alignment check"); |
|
409 |
assert(s > 0, "Bad size calculated"); |
|
410 |
return s; |
|
411 |
} |
|
412 |
||
413 |
||
414 |
inline int oopDesc::size() { |
|
415 |
return size_given_klass(blueprint()); |
|
416 |
} |
|
417 |
||
418 |
inline bool oopDesc::is_parsable() { |
|
419 |
return blueprint()->oop_is_parsable(this); |
|
420 |
} |
|
421 |
||
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422 |
inline void update_barrier_set(void* p, oop v) { |
1 | 423 |
assert(oopDesc::bs() != NULL, "Uninitialized bs in oop!"); |
424 |
oopDesc::bs()->write_ref_field(p, v); |
|
425 |
} |
|
426 |
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427 |
template <class T> inline void oop_store(T* p, oop v) { |
1 | 428 |
if (always_do_update_barrier) { |
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429 |
oop_store((volatile T*)p, v); |
1 | 430 |
} else { |
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431 |
oopDesc::encode_store_heap_oop(p, v); |
1 | 432 |
update_barrier_set(p, v); |
433 |
} |
|
434 |
} |
|
435 |
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436 |
template <class T> inline void oop_store(volatile T* p, oop v) { |
1 | 437 |
// Used by release_obj_field_put, so use release_store_ptr. |
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438 |
oopDesc::release_encode_store_heap_oop(p, v); |
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439 |
update_barrier_set((void*)p, v); |
1 | 440 |
} |
441 |
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442 |
template <class T> inline void oop_store_without_check(T* p, oop v) { |
1 | 443 |
// XXX YSR FIX ME!!! |
444 |
if (always_do_update_barrier) { |
|
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445 |
oop_store(p, v); |
1 | 446 |
} else { |
447 |
assert(!Universe::heap()->barrier_set()->write_ref_needs_barrier(p, v), |
|
448 |
"oop store without store check failed"); |
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449 |
oopDesc::encode_store_heap_oop(p, v); |
1 | 450 |
} |
451 |
} |
|
452 |
||
453 |
// When it absolutely has to get there. |
|
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454 |
template <class T> inline void oop_store_without_check(volatile T* p, oop v) { |
1 | 455 |
// XXX YSR FIX ME!!! |
456 |
if (always_do_update_barrier) { |
|
457 |
oop_store(p, v); |
|
458 |
} else { |
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459 |
assert(!Universe::heap()->barrier_set()->write_ref_needs_barrier((T*)p, v), |
1 | 460 |
"oop store without store check failed"); |
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461 |
oopDesc::release_encode_store_heap_oop(p, v); |
1 | 462 |
} |
463 |
} |
|
464 |
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465 |
// Should replace *addr = oop assignments where addr type depends on UseCompressedOops |
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466 |
// (without having to remember the function name this calls). |
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467 |
inline void oop_store_raw(HeapWord* addr, oop value) { |
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468 |
if (UseCompressedOops) { |
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469 |
oopDesc::encode_store_heap_oop((narrowOop*)addr, value); |
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470 |
} else { |
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471 |
oopDesc::encode_store_heap_oop((oop*)addr, value); |
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472 |
} |
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473 |
} |
1 | 474 |
|
475 |
// Used only for markSweep, scavenging |
|
476 |
inline bool oopDesc::is_gc_marked() const { |
|
477 |
return mark()->is_marked(); |
|
478 |
} |
|
479 |
||
480 |
inline bool oopDesc::is_locked() const { |
|
481 |
return mark()->is_locked(); |
|
482 |
} |
|
483 |
||
484 |
inline bool oopDesc::is_unlocked() const { |
|
485 |
return mark()->is_unlocked(); |
|
486 |
} |
|
487 |
||
488 |
inline bool oopDesc::has_bias_pattern() const { |
|
489 |
return mark()->has_bias_pattern(); |
|
490 |
} |
|
491 |
||
492 |
inline bool check_obj_alignment(oop obj) { |
|
493 |
return (intptr_t)obj % MinObjAlignmentInBytes == 0; |
|
494 |
} |
|
495 |
||
496 |
||
497 |
// used only for asserts |
|
498 |
inline bool oopDesc::is_oop(bool ignore_mark_word) const { |
|
499 |
oop obj = (oop) this; |
|
500 |
if (!check_obj_alignment(obj)) return false; |
|
501 |
if (!Universe::heap()->is_in_reserved(obj)) return false; |
|
502 |
// obj is aligned and accessible in heap |
|
503 |
// try to find metaclass cycle safely without seg faulting on bad input |
|
504 |
// we should reach klassKlassObj by following klass link at most 3 times |
|
505 |
for (int i = 0; i < 3; i++) { |
|
506 |
obj = obj->klass(); |
|
507 |
// klass should be aligned and in permspace |
|
508 |
if (!check_obj_alignment(obj)) return false; |
|
509 |
if (!Universe::heap()->is_in_permanent(obj)) return false; |
|
510 |
} |
|
511 |
if (obj != Universe::klassKlassObj()) { |
|
512 |
// During a dump, the _klassKlassObj moved to a shared space. |
|
513 |
if (DumpSharedSpaces && Universe::klassKlassObj()->is_shared()) { |
|
514 |
return true; |
|
515 |
} |
|
516 |
return false; |
|
517 |
} |
|
518 |
||
519 |
// Header verification: the mark is typically non-NULL. If we're |
|
520 |
// at a safepoint, it must not be null. |
|
521 |
// Outside of a safepoint, the header could be changing (for example, |
|
522 |
// another thread could be inflating a lock on this object). |
|
523 |
if (ignore_mark_word) { |
|
524 |
return true; |
|
525 |
} |
|
526 |
if (mark() != NULL) { |
|
527 |
return true; |
|
528 |
} |
|
529 |
return !SafepointSynchronize::is_at_safepoint(); |
|
530 |
} |
|
531 |
||
532 |
||
533 |
// used only for asserts |
|
534 |
inline bool oopDesc::is_oop_or_null(bool ignore_mark_word) const { |
|
535 |
return this == NULL ? true : is_oop(ignore_mark_word); |
|
536 |
} |
|
537 |
||
538 |
#ifndef PRODUCT |
|
539 |
// used only for asserts |
|
540 |
inline bool oopDesc::is_unlocked_oop() const { |
|
541 |
if (!Universe::heap()->is_in_reserved(this)) return false; |
|
542 |
return mark()->is_unlocked(); |
|
543 |
} |
|
544 |
#endif // PRODUCT |
|
545 |
||
546 |
inline void oopDesc::follow_header() { |
|
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if (UseCompressedOops) { |
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548 |
MarkSweep::mark_and_push(compressed_klass_addr()); |
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549 |
} else { |
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550 |
MarkSweep::mark_and_push(klass_addr()); |
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} |
1 | 552 |
} |
553 |
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554 |
inline void oopDesc::follow_contents(void) { |
1 | 555 |
assert (is_gc_marked(), "should be marked"); |
556 |
blueprint()->oop_follow_contents(this); |
|
557 |
} |
|
558 |
||
559 |
||
560 |
// Used by scavengers |
|
561 |
||
562 |
inline bool oopDesc::is_forwarded() const { |
|
563 |
// The extra heap check is needed since the obj might be locked, in which case the |
|
564 |
// mark would point to a stack location and have the sentinel bit cleared |
|
565 |
return mark()->is_marked(); |
|
566 |
} |
|
567 |
||
568 |
// Used by scavengers |
|
569 |
inline void oopDesc::forward_to(oop p) { |
|
570 |
assert(Universe::heap()->is_in_reserved(p), |
|
571 |
"forwarding to something not in heap"); |
|
572 |
markOop m = markOopDesc::encode_pointer_as_mark(p); |
|
573 |
assert(m->decode_pointer() == p, "encoding must be reversable"); |
|
574 |
set_mark(m); |
|
575 |
} |
|
576 |
||
577 |
// Used by parallel scavengers |
|
578 |
inline bool oopDesc::cas_forward_to(oop p, markOop compare) { |
|
579 |
assert(Universe::heap()->is_in_reserved(p), |
|
580 |
"forwarding to something not in heap"); |
|
581 |
markOop m = markOopDesc::encode_pointer_as_mark(p); |
|
582 |
assert(m->decode_pointer() == p, "encoding must be reversable"); |
|
583 |
return cas_set_mark(m, compare) == compare; |
|
584 |
} |
|
585 |
||
586 |
// Note that the forwardee is not the same thing as the displaced_mark. |
|
587 |
// The forwardee is used when copying during scavenge and mark-sweep. |
|
588 |
// It does need to clear the low two locking- and GC-related bits. |
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589 |
inline oop oopDesc::forwardee() const { |
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|
590 |
return (oop) mark()->decode_pointer(); |
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|
591 |
} |
1 | 592 |
|
593 |
inline bool oopDesc::has_displaced_mark() const { |
|
594 |
return mark()->has_displaced_mark_helper(); |
|
595 |
} |
|
596 |
||
597 |
inline markOop oopDesc::displaced_mark() const { |
|
598 |
return mark()->displaced_mark_helper(); |
|
599 |
} |
|
600 |
||
601 |
inline void oopDesc::set_displaced_mark(markOop m) { |
|
602 |
mark()->set_displaced_mark_helper(m); |
|
603 |
} |
|
604 |
||
605 |
// The following method needs to be MT safe. |
|
606 |
inline int oopDesc::age() const { |
|
607 |
assert(!is_forwarded(), "Attempt to read age from forwarded mark"); |
|
608 |
if (has_displaced_mark()) { |
|
609 |
return displaced_mark()->age(); |
|
610 |
} else { |
|
611 |
return mark()->age(); |
|
612 |
} |
|
613 |
} |
|
614 |
||
615 |
inline void oopDesc::incr_age() { |
|
616 |
assert(!is_forwarded(), "Attempt to increment age of forwarded mark"); |
|
617 |
if (has_displaced_mark()) { |
|
618 |
set_displaced_mark(displaced_mark()->incr_age()); |
|
619 |
} else { |
|
620 |
set_mark(mark()->incr_age()); |
|
621 |
} |
|
622 |
} |
|
623 |
||
624 |
||
625 |
inline intptr_t oopDesc::identity_hash() { |
|
626 |
// Fast case; if the object is unlocked and the hash value is set, no locking is needed |
|
627 |
// Note: The mark must be read into local variable to avoid concurrent updates. |
|
628 |
markOop mrk = mark(); |
|
629 |
if (mrk->is_unlocked() && !mrk->has_no_hash()) { |
|
630 |
return mrk->hash(); |
|
631 |
} else if (mrk->is_marked()) { |
|
632 |
return mrk->hash(); |
|
633 |
} else { |
|
634 |
return slow_identity_hash(); |
|
635 |
} |
|
636 |
} |
|
637 |
||
638 |
inline void oopDesc::oop_iterate_header(OopClosure* blk) { |
|
360
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|
639 |
if (UseCompressedOops) { |
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|
640 |
blk->do_oop(compressed_klass_addr()); |
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|
641 |
} else { |
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|
642 |
blk->do_oop(klass_addr()); |
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|
643 |
} |
1 | 644 |
} |
645 |
||
646 |
inline void oopDesc::oop_iterate_header(OopClosure* blk, MemRegion mr) { |
|
360
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|
647 |
if (UseCompressedOops) { |
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|
648 |
if (mr.contains(compressed_klass_addr())) { |
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|
649 |
blk->do_oop(compressed_klass_addr()); |
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|
650 |
} |
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|
651 |
} else { |
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|
652 |
if (mr.contains(klass_addr())) blk->do_oop(klass_addr()); |
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|
653 |
} |
1 | 654 |
} |
655 |
||
656 |
inline int oopDesc::adjust_pointers() { |
|
657 |
debug_only(int check_size = size()); |
|
658 |
int s = blueprint()->oop_adjust_pointers(this); |
|
659 |
assert(s == check_size, "should be the same"); |
|
660 |
return s; |
|
661 |
} |
|
662 |
||
663 |
inline void oopDesc::adjust_header() { |
|
360
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|
664 |
if (UseCompressedOops) { |
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|
665 |
MarkSweep::adjust_pointer(compressed_klass_addr()); |
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|
666 |
} else { |
21d113ecbf6a
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|
667 |
MarkSweep::adjust_pointer(klass_addr()); |
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|
668 |
} |
1 | 669 |
} |
670 |
||
671 |
#define OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
|
672 |
\ |
|
673 |
inline int oopDesc::oop_iterate(OopClosureType* blk) { \ |
|
674 |
SpecializationStats::record_call(); \ |
|
675 |
return blueprint()->oop_oop_iterate##nv_suffix(this, blk); \ |
|
676 |
} \ |
|
677 |
\ |
|
678 |
inline int oopDesc::oop_iterate(OopClosureType* blk, MemRegion mr) { \ |
|
679 |
SpecializationStats::record_call(); \ |
|
680 |
return blueprint()->oop_oop_iterate##nv_suffix##_m(this, blk, mr); \ |
|
681 |
} |
|
682 |
||
683 |
ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_ITERATE_DEFN) |
|
684 |
ALL_OOP_OOP_ITERATE_CLOSURES_3(OOP_ITERATE_DEFN) |
|
685 |
||
686 |
||
687 |
inline bool oopDesc::is_shared() const { |
|
688 |
return CompactingPermGenGen::is_shared(this); |
|
689 |
} |
|
690 |
||
691 |
inline bool oopDesc::is_shared_readonly() const { |
|
692 |
return CompactingPermGenGen::is_shared_readonly(this); |
|
693 |
} |
|
694 |
||
695 |
inline bool oopDesc::is_shared_readwrite() const { |
|
696 |
return CompactingPermGenGen::is_shared_readwrite(this); |
|
697 |
} |