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Java example source code file (sharkStateScanner.hpp)

This example Java source code file (sharkStateScanner.hpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

product_return, share_vm_shark_sharkstatescanner_hpp, sharkstack, sharktargetinvariants, sharkvalue

The sharkStateScanner.hpp Java example source code

/*
 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2008, 2009 Red Hat, Inc.
 * 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.
 *
 */

#ifndef SHARE_VM_SHARK_SHARKSTATESCANNER_HPP
#define SHARE_VM_SHARK_SHARKSTATESCANNER_HPP

#include "memory/allocation.hpp"
#include "shark/llvmHeaders.hpp"
#include "shark/sharkFunction.hpp"
#include "shark/sharkInvariants.hpp"

class SharkState;

class SharkStateScanner : public SharkTargetInvariants {
 protected:
  SharkStateScanner(SharkFunction* function)
    : SharkTargetInvariants(function), _stack(function->stack()) {}

 private:
  SharkStack* _stack;

 protected:
  SharkStack* stack() const {
    return _stack;
  }

  // Scan the frame
 public:
  void scan(SharkState* state);

  // Callbacks
  // Note that the offsets supplied to the various process_* callbacks
  // are specified in wordSize words from the frame's unextended_sp.
 protected:
  virtual void start_frame()                                                 {}

  virtual void start_stack(int stack_depth)                                  {}
  virtual void process_stack_slot(int index, SharkValue** value, int offset) {}
  virtual void end_stack()                                                   {}

  virtual void start_monitors(int num_monitors)                              {}
  virtual void process_monitor(int index, int box_offset, int obj_offset)    {}
  virtual void end_monitors()                                                {}

  virtual void start_frame_header()                                          {}
  virtual void process_oop_tmp_slot(llvm::Value** value, int offset)         {}
  virtual void process_method_slot(llvm::Value** value, int offset)          {}
  virtual void process_pc_slot(int offset)                                   {}
  virtual void end_frame_header()                                            {}

  virtual void start_locals()                                                {}
  virtual void process_local_slot(int index, SharkValue** value, int offset) {}
  virtual void end_locals()                                                  {}

  virtual void end_frame()                                                   {}

  // Integrity checks
 private:
  void stack_integrity_checks(SharkState* state) PRODUCT_RETURN;
  void locals_integrity_checks(SharkState* state) PRODUCT_RETURN;
};

#endif // SHARE_VM_SHARK_SHARKSTATESCANNER_HPP

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