hotspot/src/share/vm/shark/sharkStateScanner.hpp
author twisti
Wed, 11 Aug 2010 05:51:21 -0700
changeset 6187 4fa7845f7c14
child 7397 5b173b4ca846
permissions -rw-r--r--
6976186: integrate Shark HotSpot changes Summary: Shark is a JIT compiler for Zero that uses the LLVM compiler infrastructure. Reviewed-by: kvn, twisti Contributed-by: Gary Benson <gbenson@redhat.com>
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/*
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 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
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 * Copyright 2008, 2009 Red Hat, Inc.
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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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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class SharkState;
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class SharkStateScanner : public SharkTargetInvariants {
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 protected:
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  SharkStateScanner(SharkFunction* function)
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    : SharkTargetInvariants(function), _stack(function->stack()) {}
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 private:
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  SharkStack* _stack;
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 protected:
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  SharkStack* stack() const {
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    return _stack;
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  }
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  // Scan the frame
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 public:
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  void scan(SharkState* state);
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  // Callbacks
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  // Note that the offsets supplied to the various process_* callbacks
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  // are specified in wordSize words from the frame's unextended_sp.
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 protected:
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  virtual void start_frame()                                                 {}
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  virtual void start_stack(int stack_depth)                                  {}
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  virtual void process_stack_slot(int index, SharkValue** value, int offset) {}
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  virtual void end_stack()                                                   {}
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  virtual void start_monitors(int num_monitors)                              {}
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  virtual void process_monitor(int index, int box_offset, int obj_offset)    {}
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  virtual void end_monitors()                                                {}
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  virtual void start_frame_header()                                          {}
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  virtual void process_oop_tmp_slot(llvm::Value** value, int offset)         {}
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  virtual void process_method_slot(llvm::Value** value, int offset)          {}
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  virtual void process_pc_slot(int offset)                                   {}
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  virtual void end_frame_header()                                            {}
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  virtual void start_locals()                                                {}
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  virtual void process_local_slot(int index, SharkValue** value, int offset) {}
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  virtual void end_locals()                                                  {}
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  virtual void end_frame()                                                   {}
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  // Integrity checks
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 private:
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  void stack_integrity_checks(SharkState* state) PRODUCT_RETURN;
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  void locals_integrity_checks(SharkState* state) PRODUCT_RETURN;
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};