Mercurial > hg > graal-compiler
view src/share/vm/gc_implementation/concurrentMarkSweep/vmCMSOperations.hpp @ 1022:4c3458a31e17
6888316: G1: has_aborted() || _cm->region_stack_empty() fails
Summary: Remove incorrect guarantee.
Reviewed-by: apetrusenko, iveresov
author | tonyp |
---|---|
date | Wed, 07 Oct 2009 09:42:18 -0400 |
parents | a61af66fc99e |
children | bb843ebc7c55 |
line wrap: on
line source
/* * Copyright 2005-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ // The VM_CMS_Operation is slightly different from // a VM_GC_Operation -- and would not have subclassed easily // to VM_GC_Operation without several changes to VM_GC_Operation. // To minimize the changes, we have replicated some of the VM_GC_Operation // functionality here. We will consolidate that back by doing subclassing // as appropriate in Dolphin. // // VM_Operation // VM_CMS_Operation // - implements the common portion of work done in support // of CMS' stop-world phases (initial mark and remark). // // VM_CMS_Initial_Mark // VM_CMS_Final_Mark // // Forward decl. class CMSCollector; class VM_CMS_Operation: public VM_Operation { protected: CMSCollector* _collector; // associated collector bool _prologue_succeeded; // whether doit_prologue succeeded bool lost_race() const; // java.lang.ref.Reference support void acquire_pending_list_lock(); void release_and_notify_pending_list_lock(); public: VM_CMS_Operation(CMSCollector* collector): _collector(collector), _prologue_succeeded(false) {} ~VM_CMS_Operation() {} // The legal collector state for executing this CMS op. virtual const CMSCollector::CollectorState legal_state() const = 0; // Whether the pending list lock needs to be held virtual const bool needs_pll() const = 0; // Execute operations in the context of the caller, // prior to execution of the vm operation itself. virtual bool doit_prologue(); // Execute operations in the context of the caller, // following completion of the vm operation. virtual void doit_epilogue(); virtual bool evaluate_at_safepoint() const { return true; } virtual bool is_cheap_allocated() const { return false; } virtual bool allow_nested_vm_operations() const { return false; } bool prologue_succeeded() const { return _prologue_succeeded; } void verify_before_gc(); void verify_after_gc(); }; // VM_CMS_Operation for the initial marking phase of CMS. class VM_CMS_Initial_Mark: public VM_CMS_Operation { public: VM_CMS_Initial_Mark(CMSCollector* _collector) : VM_CMS_Operation(_collector) {} virtual VMOp_Type type() const { return VMOp_CMS_Initial_Mark; } virtual void doit(); virtual const CMSCollector::CollectorState legal_state() const { return CMSCollector::InitialMarking; } virtual const bool needs_pll() const { return false; } }; // VM_CMS_Operation for the final remark phase of CMS. class VM_CMS_Final_Remark: public VM_CMS_Operation { public: VM_CMS_Final_Remark(CMSCollector* _collector) : VM_CMS_Operation(_collector) {} virtual VMOp_Type type() const { return VMOp_CMS_Final_Remark; } virtual void doit(); virtual const CMSCollector::CollectorState legal_state() const { return CMSCollector::FinalMarking; } virtual const bool needs_pll() const { return true; } }; // VM operation to invoke a concurrent collection of the heap as a // GenCollectedHeap heap. class VM_GenCollectFullConcurrent: public VM_GC_Operation { public: VM_GenCollectFullConcurrent(unsigned int gc_count_before, unsigned int full_gc_count_before, GCCause::Cause gc_cause) : VM_GC_Operation(gc_count_before, full_gc_count_before, true /* full */) { _gc_cause = gc_cause; assert(FullGCCount_lock != NULL && UseConcMarkSweepGC && ExplicitGCInvokesConcurrent, "Otherwise shouldn't be here"); assert(UseAsyncConcMarkSweepGC, "Else will hang caller"); } ~VM_GenCollectFullConcurrent() {} virtual VMOp_Type type() const { return VMOp_GenCollectFullConcurrent; } virtual void doit(); virtual void doit_epilogue(); virtual bool is_cheap_allocated() const { return false; } virtual bool evaluate_at_safepoint() const; };