Mercurial > hg > graal-compiler
view src/share/vm/opto/locknode.hpp @ 477:24fda36852ce
6727377: VM stack guard pages on Windows should PAGE_READWRITE not PAGE_EXECUTE_READWRITE
Summary: Make reguard_stack change access to RW, not execute and use os::protect_memory with the new parameter when change needed to X.
Reviewed-by: acorn, jcoomes
author | coleenp |
---|---|
date | Wed, 10 Dec 2008 15:14:29 -0800 |
parents | 424f9bfe6b96 |
children | c18cbe5936b8 |
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/* * Copyright 1999-2008 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. * */ //------------------------------BoxLockNode------------------------------------ class BoxLockNode : public Node { public: const int _slot; RegMask _inmask; bool _is_eliminated; // indicates this lock was safely eliminated BoxLockNode( int lock ); virtual int Opcode() const; virtual void emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const; virtual uint size(PhaseRegAlloc *ra_) const; virtual const RegMask &in_RegMask(uint) const; virtual const RegMask &out_RegMask() const; virtual uint size_of() const; virtual uint hash() const; virtual uint cmp( const Node &n ) const; virtual const class Type *bottom_type() const { return TypeRawPtr::BOTTOM; } virtual uint ideal_reg() const { return Op_RegP; } static OptoReg::Name stack_slot(Node* box_node); bool is_eliminated() { return _is_eliminated; } // mark lock as eliminated. void set_eliminated() { _is_eliminated = true; } #ifndef PRODUCT virtual void format( PhaseRegAlloc *, outputStream *st ) const; virtual void dump_spec(outputStream *st) const { st->print(" Lock %d",_slot); } #endif }; //------------------------------FastLockNode----------------------------------- class FastLockNode: public CmpNode { private: BiasedLockingCounters* _counters; public: FastLockNode(Node *ctrl, Node *oop, Node *box) : CmpNode(oop,box) { init_req(0,ctrl); init_class_id(Class_FastLock); _counters = NULL; } Node* obj_node() const { return in(1); } Node* box_node() const { return in(2); } // FastLock and FastUnlockNode do not hash, we need one for each correspoding // LockNode/UnLockNode to avoid creating Phi's. virtual uint hash() const ; // { return NO_HASH; } virtual uint cmp( const Node &n ) const ; // Always fail, except on self virtual int Opcode() const; virtual const Type *Value( PhaseTransform *phase ) const { return TypeInt::CC; } const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;} void create_lock_counter(JVMState* s); BiasedLockingCounters* counters() const { return _counters; } }; //------------------------------FastUnlockNode--------------------------------- class FastUnlockNode: public CmpNode { public: FastUnlockNode(Node *ctrl, Node *oop, Node *box) : CmpNode(oop,box) { init_req(0,ctrl); init_class_id(Class_FastUnlock); } Node* obj_node() const { return in(1); } Node* box_node() const { return in(2); } // FastLock and FastUnlockNode do not hash, we need one for each correspoding // LockNode/UnLockNode to avoid creating Phi's. virtual uint hash() const ; // { return NO_HASH; } virtual uint cmp( const Node &n ) const ; // Always fail, except on self virtual int Opcode() const; virtual const Type *Value( PhaseTransform *phase ) const { return TypeInt::CC; } const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;} };