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1 /*
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2 * Copyright 2003-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
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22 * have any questions.
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23 *
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24 */
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25
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26 // | ... |
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27 // +--------------------+ ------------------
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28 // | stack slot n-1 | low addresses
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29 // | ... |
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30 // | stack slot 0 |
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31 // | monitor m-1 |
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32 // | ... |
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33 // | monitor 0 |
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34 // | oop_tmp |
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35 // | method |
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36 // | unextended_sp |
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37 // | pc |
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38 // | frame_type |
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39 // | next_frame | high addresses
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40 // +--------------------+ ------------------
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41 // | ... |
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42
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43 class SharkFrame : public ZeroFrame {
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44 friend class SharkStack;
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45
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46 private:
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47 SharkFrame() : ZeroFrame() {
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48 ShouldNotCallThis();
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49 }
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50
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51 protected:
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52 enum Layout {
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53 pc_off = jf_header_words,
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54 unextended_sp_off,
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55 method_off,
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56 oop_tmp_off,
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57 header_words
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58 };
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59
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60 public:
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61 address pc() const {
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62 return (address) value_of_word(pc_off);
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63 }
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64
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65 intptr_t* unextended_sp() const {
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66 return (intptr_t *) value_of_word(unextended_sp_off);
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67 }
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68
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69 methodOop method() const {
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70 return (methodOop) value_of_word(method_off);
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71 }
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72
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73 public:
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74 void identify_word(int frame_index,
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75 int offset,
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76 char* fieldbuf,
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77 char* valuebuf,
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78 int buflen) const;
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79 };
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