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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 #include "incls/_precompiled.incl"
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27 #include "incls/_sharkStateScanner.cpp.incl"
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28
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29 using namespace llvm;
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30
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31 void SharkStateScanner::scan(SharkState* state) {
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32 start_frame();
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33
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34 // Expression stack
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35 stack_integrity_checks(state);
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36 start_stack(state->stack_depth());
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37 for (int i = state->stack_depth() - 1; i >= 0; i--) {
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38 process_stack_slot(
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39 i,
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40 state->stack_addr(i),
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41 stack()->stack_slots_offset() +
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42 i + max_stack() - state->stack_depth());
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43 }
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44 end_stack();
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45
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46 // Monitors
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47 start_monitors(state->num_monitors());
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48 for (int i = 0; i < state->num_monitors(); i++) {
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49 process_monitor(
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50 i,
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51 stack()->monitor_offset(i),
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52 stack()->monitor_object_offset(i));
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53 }
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54 end_monitors();
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55
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56 // Frame header
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57 start_frame_header();
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58 process_oop_tmp_slot(
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59 state->oop_tmp_addr(), stack()->oop_tmp_slot_offset());
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60 process_method_slot(state->method_addr(), stack()->method_slot_offset());
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61 process_pc_slot(stack()->pc_slot_offset());
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62 end_frame_header();
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63
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64 // Local variables
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65 locals_integrity_checks(state);
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66 start_locals();
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67 for (int i = 0; i < max_locals(); i++) {
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68 process_local_slot(
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69 i,
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70 state->local_addr(i),
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71 stack()->locals_slots_offset() + max_locals() - 1 - i);
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72 }
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73 end_locals();
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74
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75 end_frame();
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76 }
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77
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78 #ifndef PRODUCT
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79 void SharkStateScanner::stack_integrity_checks(SharkState* state) {
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80 for (int i = 0; i < state->stack_depth(); i++) {
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81 if (state->stack(i)) {
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82 if (state->stack(i)->is_two_word())
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83 assert(state->stack(i - 1) == NULL, "should be");
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84 }
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85 else {
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86 assert(state->stack(i + 1)->is_two_word(), "should be");
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87 }
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88 }
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89 }
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90
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91 void SharkStateScanner::locals_integrity_checks(SharkState* state) {
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92 for (int i = 0; i < max_locals(); i++) {
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93 if (state->local(i)) {
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94 if (state->local(i)->is_two_word())
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95 assert(state->local(i + 1) == NULL, "should be");
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96 }
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97 }
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98 }
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99 #endif // !PRODUCT
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