1 /* 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2008, 2009 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef SHARE_VM_SHARK_SHARKSTATESCANNER_HPP 27 #define SHARE_VM_SHARK_SHARKSTATESCANNER_HPP 28 29 #include "memory/allocation.hpp" 30 #include "shark/llvmHeaders.hpp" 31 #include "shark/sharkFunction.hpp" 32 #include "shark/sharkInvariants.hpp" 33 34 class SharkState; 35 36 class SharkStateScanner : public SharkTargetInvariants { 37 protected: 38 SharkStateScanner(SharkFunction* function) 39 : SharkTargetInvariants(function), _stack(function->stack()) {} 40 41 private: 42 SharkStack* _stack; 43 44 protected: 45 SharkStack* stack() const { 46 return _stack; 47 } 48 49 // Scan the frame 50 public: 51 void scan(SharkState* state); 52 53 // Callbacks 54 // Note that the offsets supplied to the various process_* callbacks 55 // are specified in wordSize words from the frame's unextended_sp. 56 protected: 57 virtual void start_frame() {} 58 59 virtual void start_stack(int stack_depth) {} 60 virtual void process_stack_slot(int index, SharkValue** value, int offset) {} 61 virtual void end_stack() {} 62 63 virtual void start_monitors(int num_monitors) {} 64 virtual void process_monitor(int index, int box_offset, int obj_offset) {} 65 virtual void end_monitors() {} 66 67 virtual void start_frame_header() {} 68 virtual void process_oop_tmp_slot(llvm::Value** value, int offset) {} 69 virtual void process_method_slot(llvm::Value** value, int offset) {} 70 virtual void process_pc_slot(int offset) {} 71 virtual void end_frame_header() {} 72 73 virtual void start_locals() {} 74 virtual void process_local_slot(int index, SharkValue** value, int offset) {} 75 virtual void end_locals() {} 76 77 virtual void end_frame() {} 78 79 // Integrity checks 80 private: 81 void stack_integrity_checks(SharkState* state) PRODUCT_RETURN; 82 void locals_integrity_checks(SharkState* state) PRODUCT_RETURN; 83 }; 84 85 #endif // SHARE_VM_SHARK_SHARKSTATESCANNER_HPP