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1692
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1 /*
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2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2008, 2009 Red Hat, Inc.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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26 class SharkState;
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27
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28 class SharkStateScanner : public SharkTargetInvariants {
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29 protected:
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30 SharkStateScanner(SharkFunction* function)
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31 : SharkTargetInvariants(function), _stack(function->stack()) {}
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32
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33 private:
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34 SharkStack* _stack;
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35
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36 protected:
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37 SharkStack* stack() const {
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38 return _stack;
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39 }
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40
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41 // Scan the frame
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42 public:
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43 void scan(SharkState* state);
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44
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45 // Callbacks
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46 // Note that the offsets supplied to the various process_* callbacks
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47 // are specified in wordSize words from the frame's unextended_sp.
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48 protected:
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49 virtual void start_frame() {}
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50
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51 virtual void start_stack(int stack_depth) {}
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52 virtual void process_stack_slot(int index, SharkValue** value, int offset) {}
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53 virtual void end_stack() {}
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54
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55 virtual void start_monitors(int num_monitors) {}
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56 virtual void process_monitor(int index, int box_offset, int obj_offset) {}
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57 virtual void end_monitors() {}
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58
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59 virtual void start_frame_header() {}
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60 virtual void process_oop_tmp_slot(llvm::Value** value, int offset) {}
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61 virtual void process_method_slot(llvm::Value** value, int offset) {}
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62 virtual void process_pc_slot(int offset) {}
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63 virtual void end_frame_header() {}
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64
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65 virtual void start_locals() {}
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66 virtual void process_local_slot(int index, SharkValue** value, int offset) {}
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67 virtual void end_locals() {}
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68
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69 virtual void end_frame() {}
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70
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71 // Integrity checks
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72 private:
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73 void stack_integrity_checks(SharkState* state) PRODUCT_RETURN;
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74 void locals_integrity_checks(SharkState* state) PRODUCT_RETURN;
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75 };
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