Mercurial > hg > truffle
view src/share/vm/oops/arrayKlass.cpp @ 14649:f6301b007a16
6498581: ThreadInterruptTest3 produces wrong output on Windows
Summary: There is race condition between os::interrupt and os::is_interrupted on Windows. In JVM_Sleep(Thread.sleep), check if thread gets interrupted, it may see interrupted but not really interrupted so cause spurious waking up (early return from sleep). Fix by checking if interrupt event really gets set thus prevent false return. For intrinsic of _isInterrupted, on Windows, go fastpath only on bit not set.
Reviewed-by: acorn, kvn
Contributed-by: david.holmes@oracle.com, yumin.qi@oracle.com
author | minqi |
---|---|
date | Wed, 26 Feb 2014 15:20:41 -0800 |
parents | 48314d596a04 |
children | 4ca6dc0799b6 386dd1c71858 |
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/* * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "classfile/javaClasses.hpp" #include "classfile/systemDictionary.hpp" #include "classfile/vmSymbols.hpp" #include "gc_interface/collectedHeap.inline.hpp" #include "jvmtifiles/jvmti.h" #include "memory/gcLocker.hpp" #include "memory/universe.inline.hpp" #include "oops/arrayKlass.hpp" #include "oops/arrayOop.hpp" #include "oops/instanceKlass.hpp" #include "oops/objArrayOop.hpp" #include "oops/oop.inline.hpp" int ArrayKlass::static_size(int header_size) { // size of an array klass object assert(header_size <= InstanceKlass::header_size(), "bad header size"); // If this assert fails, see comments in base_create_array_klass. header_size = InstanceKlass::header_size(); int vtable_len = Universe::base_vtable_size(); #ifdef _LP64 int size = header_size + align_object_offset(vtable_len); #else int size = header_size + vtable_len; #endif return align_object_size(size); } Klass* ArrayKlass::java_super() const { if (super() == NULL) return NULL; // bootstrap case // Array klasses have primary supertypes which are not reported to Java. // Example super chain: String[][] -> Object[][] -> Object[] -> Object return SystemDictionary::Object_klass(); } oop ArrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) { ShouldNotReachHere(); return NULL; } Method* ArrayKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { // There are no methods in an array klass but the super class (Object) has some assert(super(), "super klass must be present"); return super()->uncached_lookup_method(name, signature); } ArrayKlass::ArrayKlass(Symbol* name) { set_name(name); set_super(Universe::is_bootstrapping() ? (Klass*)NULL : SystemDictionary::Object_klass()); set_layout_helper(Klass::_lh_neutral_value); set_dimension(1); set_higher_dimension(NULL); set_lower_dimension(NULL); set_component_mirror(NULL); // Arrays don't add any new methods, so their vtable is the same size as // the vtable of klass Object. int vtable_size = Universe::base_vtable_size(); set_vtable_length(vtable_size); set_is_cloneable(); // All arrays are considered to be cloneable (See JLS 20.1.5) } // Initialization of vtables and mirror object is done separatly from base_create_array_klass, // since a GC can happen. At this point all instance variables of the ArrayKlass must be setup. void ArrayKlass::complete_create_array_klass(ArrayKlass* k, KlassHandle super_klass, TRAPS) { ResourceMark rm(THREAD); k->initialize_supers(super_klass(), CHECK); k->vtable()->initialize_vtable(false, CHECK); java_lang_Class::create_mirror(k, Handle(NULL), CHECK); } GrowableArray<Klass*>* ArrayKlass::compute_secondary_supers(int num_extra_slots) { // interfaces = { cloneable_klass, serializable_klass }; assert(num_extra_slots == 0, "sanity of primitive array type"); // Must share this for correct bootstrapping! set_secondary_supers(Universe::the_array_interfaces_array()); return NULL; } bool ArrayKlass::compute_is_subtype_of(Klass* k) { // An array is a subtype of Serializable, Clonable, and Object return k == SystemDictionary::Object_klass() || k == SystemDictionary::Cloneable_klass() || k == SystemDictionary::Serializable_klass(); } inline intptr_t* ArrayKlass::start_of_vtable() const { // all vtables start at the same place, that's why we use InstanceKlass::header_size here return ((intptr_t*)this) + InstanceKlass::header_size(); } klassVtable* ArrayKlass::vtable() const { KlassHandle kh(Thread::current(), this); return new klassVtable(kh, start_of_vtable(), vtable_length() / vtableEntry::size()); } objArrayOop ArrayKlass::allocate_arrayArray(int n, int length, TRAPS) { if (length < 0) { THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); } if (length > arrayOopDesc::max_array_length(T_ARRAY)) { report_java_out_of_memory("Requested array size exceeds VM limit"); JvmtiExport::post_array_size_exhausted(); THROW_OOP_0(Universe::out_of_memory_error_array_size()); } int size = objArrayOopDesc::object_size(length); Klass* k = array_klass(n+dimension(), CHECK_0); ArrayKlass* ak = ArrayKlass::cast(k); objArrayOop o = (objArrayOop)CollectedHeap::array_allocate(ak, size, length, CHECK_0); // initialization to NULL not necessary, area already cleared return o; } void ArrayKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { Klass* k = this; // Iterate over this array klass and all higher dimensions while (k != NULL) { f(k, CHECK); k = ArrayKlass::cast(k)->higher_dimension(); } } void ArrayKlass::array_klasses_do(void f(Klass* k)) { Klass* k = this; // Iterate over this array klass and all higher dimensions while (k != NULL) { f(k); k = ArrayKlass::cast(k)->higher_dimension(); } } // GC support void ArrayKlass::oops_do(OopClosure* cl) { Klass::oops_do(cl); cl->do_oop(adr_component_mirror()); } // JVM support jint ArrayKlass::compute_modifier_flags(TRAPS) const { return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; } // JVMTI support jint ArrayKlass::jvmti_class_status() const { return JVMTI_CLASS_STATUS_ARRAY; } void ArrayKlass::remove_unshareable_info() { Klass::remove_unshareable_info(); // Clear the java mirror set_component_mirror(NULL); } void ArrayKlass::restore_unshareable_info(TRAPS) { Klass::restore_unshareable_info(CHECK); // Klass recreates the component mirror also } // Printing void ArrayKlass::print_on(outputStream* st) const { assert(is_klass(), "must be klass"); Klass::print_on(st); } void ArrayKlass::print_value_on(outputStream* st) const { assert(is_klass(), "must be klass"); for(int index = 0; index < dimension(); index++) { st->print("[]"); } } void ArrayKlass::oop_print_on(oop obj, outputStream* st) { assert(obj->is_array(), "must be array"); Klass::oop_print_on(obj, st); st->print_cr(" - length: %d", arrayOop(obj)->length()); } // Verification void ArrayKlass::verify_on(outputStream* st) { Klass::verify_on(st); if (component_mirror() != NULL) { guarantee(component_mirror()->klass() != NULL, "should have a class"); } } void ArrayKlass::oop_verify_on(oop obj, outputStream* st) { guarantee(obj->is_array(), "must be array"); arrayOop a = arrayOop(obj); guarantee(a->length() >= 0, "array with negative length?"); }