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1 /* |
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2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 // These classes represent the stack-map substructures described in the JVMS |
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26 // (hence the non-conforming naming scheme). |
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27 |
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28 // These classes work with the types in their compressed form in-place (as they |
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29 // would appear in the classfile). No virtual methods or fields allowed. |
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30 |
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31 class verification_type_info { |
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32 private: |
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33 // u1 tag |
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34 // u2 cpool_index || u2 bci (for ITEM_Object & ITEM_Uninitailized only) |
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35 |
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36 address tag_addr() const { return (address)this; } |
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37 address cpool_index_addr() const { return tag_addr() + sizeof(u1); } |
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38 address bci_addr() const { return cpool_index_addr(); } |
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39 |
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40 protected: |
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41 // No constructors - should be 'private', but GCC issues a warning if it is |
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42 verification_type_info() {} |
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43 verification_type_info(const verification_type_info&) {} |
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44 |
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45 public: |
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46 |
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47 static verification_type_info* at(address addr) { |
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48 return (verification_type_info*)addr; |
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49 } |
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50 |
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51 static verification_type_info* create_at(address addr, u1 tag) { |
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52 verification_type_info* vti = (verification_type_info*)addr; |
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53 vti->set_tag(tag); |
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54 return vti; |
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55 } |
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56 |
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57 static verification_type_info* create_object_at(address addr, u2 cp_idx) { |
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58 verification_type_info* vti = (verification_type_info*)addr; |
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59 vti->set_tag(ITEM_Object); |
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60 vti->set_cpool_index(cp_idx); |
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61 return vti; |
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62 } |
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63 |
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64 static verification_type_info* create_uninit_at(address addr, u2 bci) { |
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65 verification_type_info* vti = (verification_type_info*)addr; |
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66 vti->set_tag(ITEM_Uninitialized); |
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67 vti->set_bci(bci); |
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68 return vti; |
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69 } |
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70 |
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71 static size_t calculate_size(u1 tag) { |
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72 if (tag == ITEM_Object || tag == ITEM_Uninitialized) { |
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73 return sizeof(u1) + sizeof(u2); |
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74 } else { |
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75 return sizeof(u1); |
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76 } |
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77 } |
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78 |
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79 static size_t max_size() { return sizeof(u1) + sizeof(u2); } |
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80 |
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81 u1 tag() const { return *(u1*)tag_addr(); } |
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82 void set_tag(u1 tag) { *((u1*)tag_addr()) = tag; } |
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83 |
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84 bool is_object() const { return tag() == ITEM_Object; } |
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85 bool is_uninitialized() const { return tag() == ITEM_Uninitialized; } |
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86 |
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87 u2 cpool_index() const { |
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88 assert(is_object(), "This type has no cp_index"); |
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89 return Bytes::get_Java_u2(cpool_index_addr()); |
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90 } |
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91 void set_cpool_index(u2 idx) { |
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92 assert(is_object(), "This type has no cp_index"); |
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93 Bytes::put_Java_u2(cpool_index_addr(), idx); |
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94 } |
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95 |
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96 u2 bci() const { |
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97 assert(is_uninitialized(), "This type has no bci"); |
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98 return Bytes::get_Java_u2(bci_addr()); |
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99 } |
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100 |
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101 void set_bci(u2 bci) { |
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102 assert(is_uninitialized(), "This type has no bci"); |
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103 Bytes::put_Java_u2(bci_addr(), bci); |
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104 } |
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105 |
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106 void copy_from(verification_type_info* from) { |
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107 set_tag(from->tag()); |
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108 if (from->is_object()) { |
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109 set_cpool_index(from->cpool_index()); |
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110 } else if (from->is_uninitialized()) { |
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111 set_bci(from->bci()); |
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112 } |
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113 } |
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114 |
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115 size_t size() const { |
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116 return calculate_size(tag()); |
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117 } |
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118 |
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119 verification_type_info* next() { |
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120 return (verification_type_info*)((address)this + size()); |
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121 } |
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122 |
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123 // This method is used when reading unverified data in order to ensure |
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124 // that we don't read past a particular memory limit. It returns false |
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125 // if any part of the data structure is outside the specified memory bounds. |
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126 bool verify(address start, address end) { |
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127 return ((address)this >= start && |
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128 (address)this < end && |
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129 (bci_addr() + sizeof(u2) <= end || |
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130 !is_object() && !is_uninitialized())); |
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131 } |
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132 |
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133 #ifdef ASSERT |
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134 void print_on(outputStream* st) { |
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135 switch (tag()) { |
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136 case ITEM_Top: st->print("Top"); break; |
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137 case ITEM_Integer: st->print("Integer"); break; |
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138 case ITEM_Float: st->print("Float"); break; |
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139 case ITEM_Double: st->print("Double"); break; |
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140 case ITEM_Long: st->print("Long"); break; |
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141 case ITEM_Null: st->print("Null"); break; |
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142 case ITEM_UninitializedThis: |
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143 st->print("UninitializedThis"); break; |
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144 case ITEM_Uninitialized: |
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145 st->print("Uninitialized[#%d]", bci()); break; |
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146 case ITEM_Object: |
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147 st->print("Object[#%d]", cpool_index()); break; |
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148 default: |
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149 assert(false, "Bad verification_type_info"); |
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150 } |
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151 } |
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152 #endif |
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153 }; |
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154 |
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155 #define FOR_EACH_STACKMAP_FRAME_TYPE(macro, arg1, arg2) \ |
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156 macro(same_frame, arg1, arg2) \ |
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157 macro(same_frame_extended, arg1, arg2) \ |
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158 macro(same_frame_1_stack_item_frame, arg1, arg2) \ |
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159 macro(same_frame_1_stack_item_extended, arg1, arg2) \ |
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160 macro(chop_frame, arg1, arg2) \ |
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161 macro(append_frame, arg1, arg2) \ |
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162 macro(full_frame, arg1, arg2) |
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163 |
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164 #define SM_FORWARD_DECL(type, arg1, arg2) class type; |
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165 FOR_EACH_STACKMAP_FRAME_TYPE(SM_FORWARD_DECL, x, x) |
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166 #undef SM_FORWARD_DECL |
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167 |
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168 class stack_map_frame { |
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169 protected: |
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170 address frame_type_addr() const { return (address)this; } |
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171 |
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172 // No constructors - should be 'private', but GCC issues a warning if it is |
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173 stack_map_frame() {} |
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174 stack_map_frame(const stack_map_frame&) {} |
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175 |
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176 public: |
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177 |
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178 static stack_map_frame* at(address addr) { |
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179 return (stack_map_frame*)addr; |
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180 } |
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181 |
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182 stack_map_frame* next() const { |
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183 return at((address)this + size()); |
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184 } |
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185 |
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186 u1 frame_type() const { return *(u1*)frame_type_addr(); } |
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187 void set_frame_type(u1 type) { *((u1*)frame_type_addr()) = type; } |
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188 |
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189 // pseudo-virtual methods |
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190 inline size_t size() const; |
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191 inline int offset_delta() const; |
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192 inline void set_offset_delta(int offset_delta); |
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193 inline int number_of_types() const; // number of types contained in the frame |
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194 inline verification_type_info* types() const; // pointer to first type |
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195 inline bool is_valid_offset(int offset_delta) const; |
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196 |
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197 // This method must be used when reading unverified data in order to ensure |
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198 // that we don't read past a particular memory limit. It returns false |
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199 // if any part of the data structure is outside the specified memory bounds. |
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200 inline bool verify(address start, address end) const; |
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201 #ifdef ASSERT |
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202 inline void print_on(outputStream* st) const; |
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203 #endif |
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204 |
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205 // Create as_xxx and is_xxx methods for the subtypes |
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206 #define FRAME_TYPE_DECL(stackmap_frame_type, arg1, arg2) \ |
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207 inline stackmap_frame_type* as_##stackmap_frame_type() const; \ |
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208 bool is_##stackmap_frame_type() { \ |
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209 return as_##stackmap_frame_type() != NULL; \ |
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210 } |
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211 |
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212 FOR_EACH_STACKMAP_FRAME_TYPE(FRAME_TYPE_DECL, x, x) |
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213 #undef FRAME_TYPE_DECL |
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214 }; |
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215 |
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216 class same_frame : public stack_map_frame { |
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217 private: |
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218 static int frame_type_to_offset_delta(u1 frame_type) { |
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219 return frame_type + 1; } |
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220 static u1 offset_delta_to_frame_type(int offset_delta) { |
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221 return (u1)(offset_delta - 1); } |
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222 |
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223 public: |
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224 |
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225 static bool is_frame_type(u1 tag) { |
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226 return tag < 64; |
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227 } |
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228 |
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229 static same_frame* at(address addr) { |
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230 assert(is_frame_type(*addr), "Wrong frame id"); |
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231 return (same_frame*)addr; |
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232 } |
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233 |
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234 static same_frame* create_at(address addr, int offset_delta) { |
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235 same_frame* sm = (same_frame*)addr; |
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236 sm->set_offset_delta(offset_delta); |
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237 return sm; |
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238 } |
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239 |
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240 static size_t calculate_size() { return sizeof(u1); } |
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241 |
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242 size_t size() const { return calculate_size(); } |
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243 int offset_delta() const { return frame_type_to_offset_delta(frame_type()); } |
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244 |
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245 void set_offset_delta(int offset_delta) { |
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246 assert(offset_delta <= 64, "Offset too large for same_frame"); |
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247 set_frame_type(offset_delta_to_frame_type(offset_delta)); |
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248 } |
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249 |
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250 int number_of_types() const { return 0; } |
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251 verification_type_info* types() const { return NULL; } |
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252 |
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253 bool is_valid_offset(int offset_delta) const { |
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254 return is_frame_type(offset_delta_to_frame_type(offset_delta)); |
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255 } |
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256 |
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257 bool verify_subtype(address start, address end) const { |
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258 return true; |
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259 } |
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260 |
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261 #ifdef ASSERT |
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262 void print_on(outputStream* st) const { |
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263 st->print("same_frame(%d)", offset_delta()); |
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264 } |
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265 #endif |
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266 }; |
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267 |
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268 class same_frame_extended : public stack_map_frame { |
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269 private: |
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270 enum { _frame_id = 251 }; |
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271 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); } |
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272 |
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273 public: |
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274 static bool is_frame_type(u1 tag) { |
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275 return tag == _frame_id; |
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276 } |
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277 |
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278 static same_frame_extended* at(address addr) { |
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279 assert(is_frame_type(*addr), "Wrong frame type"); |
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280 return (same_frame_extended*)addr; |
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281 } |
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282 |
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283 static same_frame_extended* create_at(address addr, u2 offset_delta) { |
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284 same_frame_extended* sm = (same_frame_extended*)addr; |
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285 sm->set_frame_type(_frame_id); |
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286 sm->set_offset_delta(offset_delta); |
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287 return sm; |
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288 } |
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289 |
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290 static size_t calculate_size() { return sizeof(u1) + sizeof(u2); } |
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291 |
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292 size_t size() const { return calculate_size(); } |
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293 int offset_delta() const { |
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294 return Bytes::get_Java_u2(offset_delta_addr()) + 1; |
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295 } |
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296 |
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297 void set_offset_delta(int offset_delta) { |
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298 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1); |
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299 } |
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300 |
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301 int number_of_types() const { return 0; } |
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302 verification_type_info* types() const { return NULL; } |
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303 bool is_valid_offset(int offset) const { return true; } |
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304 |
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305 bool verify_subtype(address start, address end) const { |
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306 return frame_type_addr() + size() <= end; |
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307 } |
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308 |
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309 #ifdef ASSERT |
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310 void print_on(outputStream* st) const { |
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311 st->print("same_frame_extended(%d)", offset_delta()); |
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312 } |
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313 #endif |
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314 }; |
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315 |
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316 class same_frame_1_stack_item_frame : public stack_map_frame { |
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317 private: |
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318 address type_addr() const { return frame_type_addr() + sizeof(u1); } |
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319 |
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320 static int frame_type_to_offset_delta(u1 frame_type) { |
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321 return frame_type - 63; } |
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322 static u1 offset_delta_to_frame_type(int offset_delta) { |
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323 return (u1)(offset_delta + 63); } |
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324 |
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325 public: |
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326 static bool is_frame_type(u1 tag) { |
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327 return tag >= 64 && tag < 128; |
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328 } |
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329 |
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330 static same_frame_1_stack_item_frame* at(address addr) { |
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331 assert(is_frame_type(*addr), "Wrong frame id"); |
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332 return (same_frame_1_stack_item_frame*)addr; |
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333 } |
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334 |
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335 static same_frame_1_stack_item_frame* create_at( |
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336 address addr, int offset_delta, verification_type_info* vti) { |
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337 same_frame_1_stack_item_frame* sm = (same_frame_1_stack_item_frame*)addr; |
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338 sm->set_offset_delta(offset_delta); |
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339 if (vti != NULL) { |
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340 sm->set_type(vti); |
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341 } |
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342 return sm; |
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343 } |
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344 |
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345 static size_t calculate_size(verification_type_info* vti) { |
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346 return sizeof(u1) + vti->size(); |
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347 } |
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348 |
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349 static size_t max_size() { |
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350 return sizeof(u1) + verification_type_info::max_size(); |
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351 } |
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352 |
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353 size_t size() const { return calculate_size(types()); } |
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354 int offset_delta() const { return frame_type_to_offset_delta(frame_type()); } |
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355 |
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356 void set_offset_delta(int offset_delta) { |
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357 assert(offset_delta > 0 && offset_delta <= 64, |
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358 "Offset too large for this frame type"); |
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359 set_frame_type(offset_delta_to_frame_type(offset_delta)); |
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360 } |
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361 |
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362 void set_type(verification_type_info* vti) { |
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363 verification_type_info* cur = types(); |
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364 cur->copy_from(vti); |
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365 } |
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366 |
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367 int number_of_types() const { return 1; } |
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368 verification_type_info* types() const { |
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369 return verification_type_info::at(type_addr()); |
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370 } |
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371 |
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372 bool is_valid_offset(int offset_delta) const { |
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373 return is_frame_type(offset_delta_to_frame_type(offset_delta)); |
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374 } |
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375 |
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376 bool verify_subtype(address start, address end) const { |
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377 return types()->verify(start, end); |
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378 } |
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379 |
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380 #ifdef ASSERT |
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381 void print_on(outputStream* st) const { |
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382 st->print("same_frame_1_stack_item_frame(%d,", offset_delta()); |
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383 types()->print_on(st); |
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384 st->print(")"); |
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385 } |
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386 #endif |
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387 }; |
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388 |
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389 class same_frame_1_stack_item_extended : public stack_map_frame { |
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390 private: |
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391 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); } |
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392 address type_addr() const { return offset_delta_addr() + sizeof(u2); } |
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393 |
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394 enum { _frame_id = 247 }; |
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395 |
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396 public: |
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397 static bool is_frame_type(u1 tag) { |
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398 return tag == _frame_id; |
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399 } |
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400 |
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401 static same_frame_1_stack_item_extended* at(address addr) { |
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402 assert(is_frame_type(*addr), "Wrong frame id"); |
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403 return (same_frame_1_stack_item_extended*)addr; |
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404 } |
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405 |
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406 static same_frame_1_stack_item_extended* create_at( |
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407 address addr, int offset_delta, verification_type_info* vti) { |
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408 same_frame_1_stack_item_extended* sm = |
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409 (same_frame_1_stack_item_extended*)addr; |
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410 sm->set_frame_type(_frame_id); |
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411 sm->set_offset_delta(offset_delta); |
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412 if (vti != NULL) { |
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413 sm->set_type(vti); |
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414 } |
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415 return sm; |
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416 } |
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417 |
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418 static size_t calculate_size(verification_type_info* vti) { |
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419 return sizeof(u1) + sizeof(u2) + vti->size(); |
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420 } |
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421 |
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422 size_t size() const { return calculate_size(types()); } |
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423 int offset_delta() const { |
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424 return Bytes::get_Java_u2(offset_delta_addr()) + 1; |
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425 } |
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426 |
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427 void set_offset_delta(int offset_delta) { |
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428 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1); |
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429 } |
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430 |
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431 void set_type(verification_type_info* vti) { |
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432 verification_type_info* cur = types(); |
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433 cur->copy_from(vti); |
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434 } |
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435 |
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436 int number_of_types() const { return 1; } |
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437 verification_type_info* types() const { |
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438 return verification_type_info::at(type_addr()); |
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439 } |
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440 bool is_valid_offset(int offset) { return true; } |
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441 |
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442 bool verify_subtype(address start, address end) const { |
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443 return type_addr() < end && types()->verify(start, end); |
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444 } |
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445 |
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446 #ifdef ASSERT |
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447 void print_on(outputStream* st) const { |
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448 st->print("same_frame_1_stack_item_extended(%d,", offset_delta()); |
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449 types()->print_on(st); |
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450 st->print(")"); |
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451 } |
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452 #endif |
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453 }; |
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454 |
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455 class chop_frame : public stack_map_frame { |
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456 private: |
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457 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); } |
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458 |
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459 static int frame_type_to_chops(u1 frame_type) { |
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460 int chop = 251 - frame_type; |
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461 return chop; |
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462 } |
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463 |
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464 static u1 chops_to_frame_type(int chop) { |
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465 return 251 - chop; |
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466 } |
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467 |
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468 public: |
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469 static bool is_frame_type(u1 tag) { |
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470 return frame_type_to_chops(tag) > 0 && frame_type_to_chops(tag) < 4; |
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471 } |
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472 |
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473 static chop_frame* at(address addr) { |
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474 assert(is_frame_type(*addr), "Wrong frame id"); |
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475 return (chop_frame*)addr; |
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476 } |
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477 |
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478 static chop_frame* create_at(address addr, int offset_delta, int chops) { |
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479 chop_frame* sm = (chop_frame*)addr; |
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480 sm->set_chops(chops); |
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481 sm->set_offset_delta(offset_delta); |
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482 return sm; |
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483 } |
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484 |
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485 static size_t calculate_size() { |
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486 return sizeof(u1) + sizeof(u2); |
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487 } |
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488 |
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489 size_t size() const { return calculate_size(); } |
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490 int offset_delta() const { |
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491 return Bytes::get_Java_u2(offset_delta_addr()) + 1; |
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492 } |
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493 void set_offset_delta(int offset_delta) { |
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494 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1); |
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495 } |
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496 |
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497 int chops() const { |
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498 int chops = frame_type_to_chops(frame_type()); |
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499 assert(chops > 0 && chops < 4, "Invalid number of chops in frame"); |
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500 return chops; |
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501 } |
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502 void set_chops(int chops) { |
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503 assert(chops > 0 && chops <= 3, "Bad number of chops"); |
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504 set_frame_type(chops_to_frame_type(chops)); |
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505 } |
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506 |
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507 int number_of_types() const { return 0; } |
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508 verification_type_info* types() const { return NULL; } |
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509 bool is_valid_offset(int offset) { return true; } |
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510 |
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511 bool verify_subtype(address start, address end) const { |
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512 return frame_type_addr() + size() <= end; |
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513 } |
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514 |
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515 #ifdef ASSERT |
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516 void print_on(outputStream* st) const { |
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517 st->print("chop_frame(%d,%d)", offset_delta(), chops()); |
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518 } |
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519 #endif |
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520 }; |
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521 |
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522 class append_frame : public stack_map_frame { |
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523 private: |
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524 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); } |
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525 address types_addr() const { return offset_delta_addr() + sizeof(u2); } |
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526 |
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527 static int frame_type_to_appends(u1 frame_type) { |
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528 int append = frame_type - 251; |
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529 return append; |
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530 } |
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531 |
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532 static u1 appends_to_frame_type(int appends) { |
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533 assert(appends > 0 && appends < 4, "Invalid append amount"); |
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534 return 251 + appends; |
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535 } |
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536 |
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537 public: |
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538 static bool is_frame_type(u1 tag) { |
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539 return frame_type_to_appends(tag) > 0 && frame_type_to_appends(tag) < 4; |
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540 } |
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541 |
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542 static append_frame* at(address addr) { |
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543 assert(is_frame_type(*addr), "Wrong frame id"); |
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544 return (append_frame*)addr; |
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545 } |
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546 |
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547 static append_frame* create_at( |
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548 address addr, int offset_delta, int appends, |
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549 verification_type_info* types) { |
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550 append_frame* sm = (append_frame*)addr; |
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551 sm->set_appends(appends); |
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552 sm->set_offset_delta(offset_delta); |
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553 if (types != NULL) { |
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554 verification_type_info* cur = sm->types(); |
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555 for (int i = 0; i < appends; ++i) { |
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556 cur->copy_from(types); |
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557 cur = cur->next(); |
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558 types = types->next(); |
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559 } |
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560 } |
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561 return sm; |
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562 } |
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563 |
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564 static size_t calculate_size(int appends, verification_type_info* types) { |
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565 size_t sz = sizeof(u1) + sizeof(u2); |
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566 for (int i = 0; i < appends; ++i) { |
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567 sz += types->size(); |
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568 types = types->next(); |
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569 } |
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570 return sz; |
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571 } |
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572 |
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573 static size_t max_size() { |
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574 return sizeof(u1) + sizeof(u2) + 3 * verification_type_info::max_size(); |
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575 } |
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576 |
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577 size_t size() const { return calculate_size(number_of_types(), types()); } |
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578 int offset_delta() const { |
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579 return Bytes::get_Java_u2(offset_delta_addr()) + 1; |
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580 } |
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581 |
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582 void set_offset_delta(int offset_delta) { |
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583 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1); |
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584 } |
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585 |
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586 void set_appends(int appends) { |
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587 assert(appends > 0 && appends < 4, "Bad number of appends"); |
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588 set_frame_type(appends_to_frame_type(appends)); |
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589 } |
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590 |
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591 int number_of_types() const { |
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592 int appends = frame_type_to_appends(frame_type()); |
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593 assert(appends > 0 && appends < 4, "Invalid number of appends in frame"); |
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594 return appends; |
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595 } |
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596 verification_type_info* types() const { |
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597 return verification_type_info::at(types_addr()); |
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598 } |
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599 bool is_valid_offset(int offset) const { return true; } |
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600 |
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601 bool verify_subtype(address start, address end) const { |
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602 verification_type_info* vti = types(); |
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603 if ((address)vti < end && vti->verify(start, end)) { |
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604 int nof = number_of_types(); |
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605 vti = vti->next(); |
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606 if (nof < 2 || vti->verify(start, end)) { |
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607 vti = vti->next(); |
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608 if (nof < 3 || vti->verify(start, end)) { |
|
609 return true; |
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610 } |
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611 } |
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612 } |
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613 return false; |
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614 } |
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615 |
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616 #ifdef ASSERT |
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617 void print_on(outputStream* st) const { |
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618 st->print("append_frame(%d,", offset_delta()); |
|
619 verification_type_info* vti = types(); |
|
620 for (int i = 0; i < number_of_types(); ++i) { |
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621 vti->print_on(st); |
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622 if (i != number_of_types() - 1) { |
|
623 st->print(","); |
|
624 } |
|
625 vti = vti->next(); |
|
626 } |
|
627 st->print(")"); |
|
628 } |
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629 #endif |
|
630 }; |
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631 |
|
632 class full_frame : public stack_map_frame { |
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633 private: |
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634 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); } |
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635 address num_locals_addr() const { return offset_delta_addr() + sizeof(u2); } |
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636 address locals_addr() const { return num_locals_addr() + sizeof(u2); } |
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637 address stack_slots_addr(address end_of_locals) const { |
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638 return end_of_locals; } |
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639 address stack_addr(address end_of_locals) const { |
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640 return stack_slots_addr(end_of_locals) + sizeof(u2); } |
|
641 |
|
642 enum { _frame_id = 255 }; |
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643 |
|
644 public: |
|
645 static bool is_frame_type(u1 tag) { |
|
646 return tag == _frame_id; |
|
647 } |
|
648 |
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649 static full_frame* at(address addr) { |
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650 assert(is_frame_type(*addr), "Wrong frame id"); |
|
651 return (full_frame*)addr; |
|
652 } |
|
653 |
|
654 static full_frame* create_at( |
|
655 address addr, int offset_delta, int num_locals, |
|
656 verification_type_info* locals, |
|
657 int stack_slots, verification_type_info* stack) { |
|
658 full_frame* sm = (full_frame*)addr; |
|
659 sm->set_frame_type(_frame_id); |
|
660 sm->set_offset_delta(offset_delta); |
|
661 sm->set_num_locals(num_locals); |
|
662 if (locals != NULL) { |
|
663 verification_type_info* cur = sm->locals(); |
|
664 for (int i = 0; i < num_locals; ++i) { |
|
665 cur->copy_from(locals); |
|
666 cur = cur->next(); |
|
667 locals = locals->next(); |
|
668 } |
|
669 address end_of_locals = (address)cur; |
|
670 sm->set_stack_slots(end_of_locals, stack_slots); |
|
671 cur = sm->stack(end_of_locals); |
|
672 for (int i = 0; i < stack_slots; ++i) { |
|
673 cur->copy_from(stack); |
|
674 cur = cur->next(); |
|
675 stack = stack->next(); |
|
676 } |
|
677 } |
|
678 return sm; |
|
679 } |
|
680 |
|
681 static size_t calculate_size( |
|
682 int num_locals, verification_type_info* locals, |
|
683 int stack_slots, verification_type_info* stack) { |
|
684 size_t sz = sizeof(u1) + sizeof(u2) + sizeof(u2) + sizeof(u2); |
|
685 verification_type_info* vti = locals; |
|
686 for (int i = 0; i < num_locals; ++i) { |
|
687 sz += vti->size(); |
|
688 vti = vti->next(); |
|
689 } |
|
690 vti = stack; |
|
691 for (int i = 0; i < stack_slots; ++i) { |
|
692 sz += vti->size(); |
|
693 vti = vti->next(); |
|
694 } |
|
695 return sz; |
|
696 } |
|
697 |
|
698 static size_t max_size(int locals, int stack) { |
|
699 return sizeof(u1) + 3 * sizeof(u2) + |
|
700 (locals + stack) * verification_type_info::max_size(); |
|
701 } |
|
702 |
|
703 size_t size() const { |
|
704 address eol = end_of_locals(); |
|
705 return calculate_size(num_locals(), locals(), stack_slots(eol), stack(eol)); |
|
706 } |
|
707 |
|
708 int offset_delta() const { |
|
709 return Bytes::get_Java_u2(offset_delta_addr()) + 1; |
|
710 } |
|
711 int num_locals() const { return Bytes::get_Java_u2(num_locals_addr()); } |
|
712 verification_type_info* locals() const { |
|
713 return verification_type_info::at(locals_addr()); |
|
714 } |
|
715 address end_of_locals() const { |
|
716 verification_type_info* vti = locals(); |
|
717 for (int i = 0; i < num_locals(); ++i) { |
|
718 vti = vti->next(); |
|
719 } |
|
720 return (address)vti; |
|
721 } |
|
722 int stack_slots(address end_of_locals) const { |
|
723 return Bytes::get_Java_u2(stack_slots_addr(end_of_locals)); |
|
724 } |
|
725 verification_type_info* stack(address end_of_locals) const { |
|
726 return verification_type_info::at(stack_addr(end_of_locals)); |
|
727 } |
|
728 |
|
729 void set_offset_delta(int offset_delta) { |
|
730 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1); |
|
731 } |
|
732 void set_num_locals(int num_locals) { |
|
733 Bytes::put_Java_u2(num_locals_addr(), num_locals); |
|
734 } |
|
735 void set_stack_slots(address end_of_locals, int stack_slots) { |
|
736 Bytes::put_Java_u2(stack_slots_addr(end_of_locals), stack_slots); |
|
737 } |
|
738 |
|
739 // These return only the locals. Extra processing is required for stack |
|
740 // types of full frames. |
|
741 int number_of_types() const { return num_locals(); } |
|
742 verification_type_info* types() const { return locals(); } |
|
743 bool is_valid_offset(int offset) { return true; } |
|
744 |
|
745 bool verify_subtype(address start, address end) const { |
|
746 verification_type_info* vti = types(); |
|
747 if ((address)vti >= end) { |
|
748 return false; |
|
749 } |
|
750 int count = number_of_types(); |
|
751 for (int i = 0; i < count; ++i) { |
|
752 if (!vti->verify(start, end)) { |
|
753 return false; |
|
754 } |
|
755 vti = vti->next(); |
|
756 } |
|
757 address eol = (address)vti; |
|
758 if (eol + sizeof(u2) > end) { |
|
759 return false; |
|
760 } |
|
761 count = stack_slots(eol); |
|
762 vti = stack(eol); |
|
763 for (int i = 0; i < stack_slots(eol); ++i) { |
|
764 if (!vti->verify(start, end)) { |
|
765 return false; |
|
766 } |
|
767 vti = vti->next(); |
|
768 } |
|
769 return true; |
|
770 } |
|
771 |
|
772 #ifdef ASSERT |
|
773 void print_on(outputStream* st) const { |
|
774 st->print("full_frame(%d,{", offset_delta()); |
|
775 verification_type_info* vti = locals(); |
|
776 for (int i = 0; i < num_locals(); ++i) { |
|
777 vti->print_on(st); |
|
778 if (i != num_locals() - 1) { |
|
779 st->print(","); |
|
780 } |
|
781 vti = vti->next(); |
|
782 } |
|
783 st->print("},{"); |
|
784 address end_of_locals = (address)vti; |
|
785 vti = stack(end_of_locals); |
|
786 int ss = stack_slots(end_of_locals); |
|
787 for (int i = 0; i < ss; ++i) { |
|
788 vti->print_on(st); |
|
789 if (i != ss - 1) { |
|
790 st->print(","); |
|
791 } |
|
792 vti = vti->next(); |
|
793 } |
|
794 st->print("})"); |
|
795 } |
|
796 #endif |
|
797 }; |
|
798 |
|
799 #define VIRTUAL_DISPATCH(stack_frame_type, func_name, args) \ |
|
800 stack_frame_type* item_##stack_frame_type = as_##stack_frame_type(); \ |
|
801 if (item_##stack_frame_type != NULL) { \ |
|
802 return item_##stack_frame_type->func_name args; \ |
|
803 } |
|
804 |
|
805 #define VOID_VIRTUAL_DISPATCH(stack_frame_type, func_name, args) \ |
|
806 stack_frame_type* item_##stack_frame_type = as_##stack_frame_type(); \ |
|
807 if (item_##stack_frame_type != NULL) { \ |
|
808 item_##stack_frame_type->func_name args; \ |
|
809 return; \ |
|
810 } |
|
811 |
|
812 size_t stack_map_frame::size() const { |
|
813 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, size, ()); |
|
814 return 0; |
|
815 } |
|
816 |
|
817 int stack_map_frame::offset_delta() const { |
|
818 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, offset_delta, ()); |
|
819 return 0; |
|
820 } |
|
821 |
|
822 void stack_map_frame::set_offset_delta(int offset_delta) { |
|
823 FOR_EACH_STACKMAP_FRAME_TYPE( |
|
824 VOID_VIRTUAL_DISPATCH, set_offset_delta, (offset_delta)); |
|
825 } |
|
826 |
|
827 int stack_map_frame::number_of_types() const { |
|
828 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, number_of_types, ()); |
|
829 return 0; |
|
830 } |
|
831 |
|
832 verification_type_info* stack_map_frame::types() const { |
|
833 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, types, ()); |
|
834 return NULL; |
|
835 } |
|
836 |
|
837 bool stack_map_frame::is_valid_offset(int offset) const { |
|
838 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, is_valid_offset, (offset)); |
|
839 return true; |
|
840 } |
|
841 |
|
842 bool stack_map_frame::verify(address start, address end) const { |
|
843 if (frame_type_addr() >= start && frame_type_addr() < end) { |
|
844 FOR_EACH_STACKMAP_FRAME_TYPE( |
|
845 VIRTUAL_DISPATCH, verify_subtype, (start, end)); |
|
846 } |
|
847 return false; |
|
848 } |
|
849 |
|
850 #ifdef ASSERT |
|
851 void stack_map_frame::print_on(outputStream* st) const { |
|
852 FOR_EACH_STACKMAP_FRAME_TYPE(VOID_VIRTUAL_DISPATCH, print_on, (st)); |
|
853 } |
|
854 #endif |
|
855 |
|
856 #undef VIRTUAL_DISPATCH |
|
857 #undef VOID_VIRTUAL_DISPATCH |
|
858 |
|
859 #define AS_SUBTYPE_DEF(stack_frame_type, arg1, arg2) \ |
|
860 stack_frame_type* stack_map_frame::as_##stack_frame_type() const { \ |
|
861 if (stack_frame_type::is_frame_type(frame_type())) { \ |
|
862 return (stack_frame_type*)this; \ |
|
863 } else { \ |
|
864 return NULL; \ |
|
865 } \ |
|
866 } |
|
867 |
|
868 FOR_EACH_STACKMAP_FRAME_TYPE(AS_SUBTYPE_DEF, x, x) |
|
869 #undef AS_SUBTYPE_DEF |
|
870 |
|
871 class stack_map_table_attribute { |
|
872 private: |
|
873 address name_index_addr() const { |
|
874 return (address)this; } |
|
875 address attribute_length_addr() const { |
|
876 return name_index_addr() + sizeof(u2); } |
|
877 address number_of_entries_addr() const { |
|
878 return attribute_length_addr() + sizeof(u4); } |
|
879 address entries_addr() const { |
|
880 return number_of_entries_addr() + sizeof(u2); } |
|
881 |
|
882 protected: |
|
883 // No constructors - should be 'private', but GCC issues a warning if it is |
|
884 stack_map_table_attribute() {} |
|
885 stack_map_table_attribute(const stack_map_table_attribute&) {} |
|
886 |
|
887 public: |
|
888 |
|
889 static stack_map_table_attribute* at(address addr) { |
|
890 return (stack_map_table_attribute*)addr; |
|
891 } |
|
892 |
|
893 u2 name_index() const { |
|
894 return Bytes::get_Java_u2(name_index_addr()); } |
|
895 u4 attribute_length() const { |
|
896 return Bytes::get_Java_u4(attribute_length_addr()); } |
|
897 u2 number_of_entries() const { |
|
898 return Bytes::get_Java_u2(number_of_entries_addr()); } |
|
899 stack_map_frame* entries() const { |
|
900 return stack_map_frame::at(entries_addr()); |
|
901 } |
|
902 |
|
903 static size_t header_size() { |
|
904 return sizeof(u2) + sizeof(u4); |
|
905 } |
|
906 |
|
907 void set_name_index(u2 idx) { |
|
908 Bytes::put_Java_u2(name_index_addr(), idx); |
|
909 } |
|
910 void set_attribute_length(u4 len) { |
|
911 Bytes::put_Java_u4(attribute_length_addr(), len); |
|
912 } |
|
913 void set_number_of_entries(u2 num) { |
|
914 Bytes::put_Java_u2(number_of_entries_addr(), num); |
|
915 } |
|
916 }; |