| /* |
| * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/altHashing.hpp" |
| #include "classfile/javaClasses.inline.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "oops/verifyOopClosure.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/thread.inline.hpp" |
| #include "utilities/copy.hpp" |
| |
| bool always_do_update_barrier = false; |
| |
| BarrierSet* oopDesc::_bs = NULL; |
| |
| void oopDesc::print_on(outputStream* st) const { |
| if (this == NULL) { |
| st->print_cr("NULL"); |
| } else { |
| klass()->oop_print_on(oop(this), st); |
| } |
| } |
| |
| void oopDesc::print_address_on(outputStream* st) const { |
| st->print("{" INTPTR_FORMAT "}", p2i(this)); |
| |
| } |
| |
| void oopDesc::print() { print_on(tty); } |
| |
| void oopDesc::print_address() { print_address_on(tty); } |
| |
| char* oopDesc::print_string() { |
| stringStream st; |
| print_on(&st); |
| return st.as_string(); |
| } |
| |
| void oopDesc::print_value() { |
| print_value_on(tty); |
| } |
| |
| char* oopDesc::print_value_string() { |
| char buf[100]; |
| stringStream st(buf, sizeof(buf)); |
| print_value_on(&st); |
| return st.as_string(); |
| } |
| |
| void oopDesc::print_value_on(outputStream* st) const { |
| oop obj = oop(this); |
| if (this == NULL) { |
| st->print("NULL"); |
| } else if (java_lang_String::is_instance(obj)) { |
| java_lang_String::print(obj, st); |
| print_address_on(st); |
| } else { |
| klass()->oop_print_value_on(obj, st); |
| } |
| } |
| |
| |
| void oopDesc::verify_on(outputStream* st) { |
| if (this != NULL) { |
| klass()->oop_verify_on(this, st); |
| } |
| } |
| |
| |
| void oopDesc::verify() { |
| verify_on(tty); |
| } |
| |
| intptr_t oopDesc::slow_identity_hash() { |
| // slow case; we have to acquire the micro lock in order to locate the header |
| ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY |
| HandleMark hm; |
| Handle object(this); |
| return ObjectSynchronizer::identity_hash_value_for(object); |
| } |
| |
| // When String table needs to rehash |
| unsigned int oopDesc::new_hash(juint seed) { |
| EXCEPTION_MARK; |
| ResourceMark rm; |
| int length; |
| jchar* chars = java_lang_String::as_unicode_string(this, length, THREAD); |
| if (chars != NULL) { |
| // Use alternate hashing algorithm on the string |
| return AltHashing::murmur3_32(seed, chars, length); |
| } else { |
| vm_exit_out_of_memory(length, OOM_MALLOC_ERROR, "unable to create Unicode strings for String table rehash"); |
| return 0; |
| } |
| } |
| |
| VerifyOopClosure VerifyOopClosure::verify_oop; |
| |
| template <class T> void VerifyOopClosure::do_oop_work(T* p) { |
| oop obj = oopDesc::load_decode_heap_oop(p); |
| guarantee(obj->is_oop_or_null(), "invalid oop: " INTPTR_FORMAT, p2i((oopDesc*) obj)); |
| } |
| |
| void VerifyOopClosure::do_oop(oop* p) { VerifyOopClosure::do_oop_work(p); } |
| void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); } |
| |
| // type test operations that doesn't require inclusion of oop.inline.hpp. |
| bool oopDesc::is_instance_noinline() const { return is_instance(); } |
| bool oopDesc::is_array_noinline() const { return is_array(); } |
| bool oopDesc::is_objArray_noinline() const { return is_objArray(); } |
| bool oopDesc::is_typeArray_noinline() const { return is_typeArray(); } |
| |
| bool oopDesc::has_klass_gap() { |
| // Only has a klass gap when compressed class pointers are used. |
| return UseCompressedClassPointers; |
| } |