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1877
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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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1972
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25 #ifndef SHARE_VM_CLASSFILE_STACKMAPTABLEFORMAT_HPP
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26 #define SHARE_VM_CLASSFILE_STACKMAPTABLEFORMAT_HPP
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27
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28 #include "classfile/verificationType.hpp"
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29
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1877
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30 // These classes represent the stack-map substructures described in the JVMS
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31 // (hence the non-conforming naming scheme).
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32
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33 // These classes work with the types in their compressed form in-place (as they
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34 // would appear in the classfile). No virtual methods or fields allowed.
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35
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36 class verification_type_info {
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37 private:
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38 // u1 tag
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39 // u2 cpool_index || u2 bci (for ITEM_Object & ITEM_Uninitailized only)
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40
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41 address tag_addr() const { return (address)this; }
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42 address cpool_index_addr() const { return tag_addr() + sizeof(u1); }
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43 address bci_addr() const { return cpool_index_addr(); }
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44
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45 protected:
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46 // No constructors - should be 'private', but GCC issues a warning if it is
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47 verification_type_info() {}
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48 verification_type_info(const verification_type_info&) {}
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49
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50 public:
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51
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52 static verification_type_info* at(address addr) {
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53 return (verification_type_info*)addr;
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54 }
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55
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56 static verification_type_info* create_at(address addr, u1 tag) {
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57 verification_type_info* vti = (verification_type_info*)addr;
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58 vti->set_tag(tag);
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59 return vti;
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60 }
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61
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62 static verification_type_info* create_object_at(address addr, u2 cp_idx) {
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63 verification_type_info* vti = (verification_type_info*)addr;
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64 vti->set_tag(ITEM_Object);
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65 vti->set_cpool_index(cp_idx);
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66 return vti;
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67 }
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68
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69 static verification_type_info* create_uninit_at(address addr, u2 bci) {
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70 verification_type_info* vti = (verification_type_info*)addr;
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71 vti->set_tag(ITEM_Uninitialized);
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72 vti->set_bci(bci);
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73 return vti;
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74 }
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75
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76 static size_t calculate_size(u1 tag) {
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77 if (tag == ITEM_Object || tag == ITEM_Uninitialized) {
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78 return sizeof(u1) + sizeof(u2);
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79 } else {
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80 return sizeof(u1);
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81 }
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82 }
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83
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84 static size_t max_size() { return sizeof(u1) + sizeof(u2); }
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85
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86 u1 tag() const { return *(u1*)tag_addr(); }
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87 void set_tag(u1 tag) { *((u1*)tag_addr()) = tag; }
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88
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89 bool is_object() const { return tag() == ITEM_Object; }
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90 bool is_uninitialized() const { return tag() == ITEM_Uninitialized; }
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91
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92 u2 cpool_index() const {
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93 assert(is_object(), "This type has no cp_index");
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94 return Bytes::get_Java_u2(cpool_index_addr());
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95 }
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96 void set_cpool_index(u2 idx) {
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97 assert(is_object(), "This type has no cp_index");
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98 Bytes::put_Java_u2(cpool_index_addr(), idx);
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99 }
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100
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101 u2 bci() const {
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102 assert(is_uninitialized(), "This type has no bci");
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103 return Bytes::get_Java_u2(bci_addr());
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104 }
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105
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106 void set_bci(u2 bci) {
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107 assert(is_uninitialized(), "This type has no bci");
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108 Bytes::put_Java_u2(bci_addr(), bci);
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109 }
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110
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111 void copy_from(verification_type_info* from) {
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112 set_tag(from->tag());
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113 if (from->is_object()) {
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114 set_cpool_index(from->cpool_index());
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115 } else if (from->is_uninitialized()) {
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116 set_bci(from->bci());
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117 }
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118 }
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119
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120 size_t size() const {
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121 return calculate_size(tag());
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122 }
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123
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124 verification_type_info* next() {
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125 return (verification_type_info*)((address)this + size());
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126 }
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127
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128 // This method is used when reading unverified data in order to ensure
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129 // that we don't read past a particular memory limit. It returns false
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130 // if any part of the data structure is outside the specified memory bounds.
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131 bool verify(address start, address end) {
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132 return ((address)this >= start &&
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133 (address)this < end &&
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134 (bci_addr() + sizeof(u2) <= end ||
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135 !is_object() && !is_uninitialized()));
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136 }
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137
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138 #ifdef ASSERT
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139 void print_on(outputStream* st) {
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140 switch (tag()) {
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141 case ITEM_Top: st->print("Top"); break;
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142 case ITEM_Integer: st->print("Integer"); break;
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143 case ITEM_Float: st->print("Float"); break;
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144 case ITEM_Double: st->print("Double"); break;
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145 case ITEM_Long: st->print("Long"); break;
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146 case ITEM_Null: st->print("Null"); break;
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147 case ITEM_UninitializedThis:
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148 st->print("UninitializedThis"); break;
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149 case ITEM_Uninitialized:
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150 st->print("Uninitialized[#%d]", bci()); break;
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151 case ITEM_Object:
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152 st->print("Object[#%d]", cpool_index()); break;
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153 default:
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154 assert(false, "Bad verification_type_info");
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155 }
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156 }
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157 #endif
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158 };
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159
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160 #define FOR_EACH_STACKMAP_FRAME_TYPE(macro, arg1, arg2) \
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161 macro(same_frame, arg1, arg2) \
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162 macro(same_frame_extended, arg1, arg2) \
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163 macro(same_frame_1_stack_item_frame, arg1, arg2) \
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164 macro(same_frame_1_stack_item_extended, arg1, arg2) \
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165 macro(chop_frame, arg1, arg2) \
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166 macro(append_frame, arg1, arg2) \
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167 macro(full_frame, arg1, arg2)
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168
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169 #define SM_FORWARD_DECL(type, arg1, arg2) class type;
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170 FOR_EACH_STACKMAP_FRAME_TYPE(SM_FORWARD_DECL, x, x)
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171 #undef SM_FORWARD_DECL
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172
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173 class stack_map_frame {
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174 protected:
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175 address frame_type_addr() const { return (address)this; }
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176
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177 // No constructors - should be 'private', but GCC issues a warning if it is
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178 stack_map_frame() {}
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179 stack_map_frame(const stack_map_frame&) {}
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180
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181 public:
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182
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183 static stack_map_frame* at(address addr) {
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184 return (stack_map_frame*)addr;
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185 }
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186
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187 stack_map_frame* next() const {
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188 return at((address)this + size());
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189 }
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190
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191 u1 frame_type() const { return *(u1*)frame_type_addr(); }
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192 void set_frame_type(u1 type) { *((u1*)frame_type_addr()) = type; }
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193
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194 // pseudo-virtual methods
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195 inline size_t size() const;
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196 inline int offset_delta() const;
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197 inline void set_offset_delta(int offset_delta);
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198 inline int number_of_types() const; // number of types contained in the frame
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199 inline verification_type_info* types() const; // pointer to first type
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200 inline bool is_valid_offset(int offset_delta) const;
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201
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202 // This method must be used when reading unverified data in order to ensure
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203 // that we don't read past a particular memory limit. It returns false
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204 // if any part of the data structure is outside the specified memory bounds.
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205 inline bool verify(address start, address end) const;
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206 #ifdef ASSERT
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207 inline void print_on(outputStream* st) const;
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208 #endif
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209
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210 // Create as_xxx and is_xxx methods for the subtypes
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211 #define FRAME_TYPE_DECL(stackmap_frame_type, arg1, arg2) \
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212 inline stackmap_frame_type* as_##stackmap_frame_type() const; \
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213 bool is_##stackmap_frame_type() { \
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214 return as_##stackmap_frame_type() != NULL; \
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215 }
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216
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217 FOR_EACH_STACKMAP_FRAME_TYPE(FRAME_TYPE_DECL, x, x)
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218 #undef FRAME_TYPE_DECL
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219 };
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220
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221 class same_frame : public stack_map_frame {
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222 private:
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223 static int frame_type_to_offset_delta(u1 frame_type) {
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224 return frame_type + 1; }
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225 static u1 offset_delta_to_frame_type(int offset_delta) {
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226 return (u1)(offset_delta - 1); }
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227
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228 public:
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229
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230 static bool is_frame_type(u1 tag) {
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231 return tag < 64;
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232 }
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233
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234 static same_frame* at(address addr) {
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235 assert(is_frame_type(*addr), "Wrong frame id");
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236 return (same_frame*)addr;
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237 }
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238
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239 static same_frame* create_at(address addr, int offset_delta) {
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240 same_frame* sm = (same_frame*)addr;
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241 sm->set_offset_delta(offset_delta);
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242 return sm;
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243 }
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244
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245 static size_t calculate_size() { return sizeof(u1); }
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246
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247 size_t size() const { return calculate_size(); }
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248 int offset_delta() const { return frame_type_to_offset_delta(frame_type()); }
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249
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250 void set_offset_delta(int offset_delta) {
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251 assert(offset_delta <= 64, "Offset too large for same_frame");
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252 set_frame_type(offset_delta_to_frame_type(offset_delta));
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253 }
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254
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255 int number_of_types() const { return 0; }
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256 verification_type_info* types() const { return NULL; }
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257
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258 bool is_valid_offset(int offset_delta) const {
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259 return is_frame_type(offset_delta_to_frame_type(offset_delta));
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260 }
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261
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262 bool verify_subtype(address start, address end) const {
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263 return true;
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264 }
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265
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266 #ifdef ASSERT
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267 void print_on(outputStream* st) const {
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268 st->print("same_frame(%d)", offset_delta());
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269 }
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270 #endif
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271 };
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272
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273 class same_frame_extended : public stack_map_frame {
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274 private:
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275 enum { _frame_id = 251 };
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276 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); }
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277
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278 public:
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279 static bool is_frame_type(u1 tag) {
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280 return tag == _frame_id;
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281 }
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282
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283 static same_frame_extended* at(address addr) {
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284 assert(is_frame_type(*addr), "Wrong frame type");
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285 return (same_frame_extended*)addr;
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286 }
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287
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288 static same_frame_extended* create_at(address addr, u2 offset_delta) {
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289 same_frame_extended* sm = (same_frame_extended*)addr;
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290 sm->set_frame_type(_frame_id);
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291 sm->set_offset_delta(offset_delta);
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292 return sm;
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293 }
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294
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295 static size_t calculate_size() { return sizeof(u1) + sizeof(u2); }
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296
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297 size_t size() const { return calculate_size(); }
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298 int offset_delta() const {
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299 return Bytes::get_Java_u2(offset_delta_addr()) + 1;
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300 }
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301
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302 void set_offset_delta(int offset_delta) {
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303 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1);
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304 }
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305
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306 int number_of_types() const { return 0; }
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307 verification_type_info* types() const { return NULL; }
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308 bool is_valid_offset(int offset) const { return true; }
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309
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310 bool verify_subtype(address start, address end) const {
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311 return frame_type_addr() + size() <= end;
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312 }
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313
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314 #ifdef ASSERT
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315 void print_on(outputStream* st) const {
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316 st->print("same_frame_extended(%d)", offset_delta());
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317 }
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318 #endif
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319 };
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320
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321 class same_frame_1_stack_item_frame : public stack_map_frame {
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322 private:
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323 address type_addr() const { return frame_type_addr() + sizeof(u1); }
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324
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325 static int frame_type_to_offset_delta(u1 frame_type) {
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326 return frame_type - 63; }
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327 static u1 offset_delta_to_frame_type(int offset_delta) {
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328 return (u1)(offset_delta + 63); }
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329
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330 public:
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331 static bool is_frame_type(u1 tag) {
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332 return tag >= 64 && tag < 128;
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333 }
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334
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335 static same_frame_1_stack_item_frame* at(address addr) {
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336 assert(is_frame_type(*addr), "Wrong frame id");
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337 return (same_frame_1_stack_item_frame*)addr;
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338 }
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339
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340 static same_frame_1_stack_item_frame* create_at(
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341 address addr, int offset_delta, verification_type_info* vti) {
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342 same_frame_1_stack_item_frame* sm = (same_frame_1_stack_item_frame*)addr;
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343 sm->set_offset_delta(offset_delta);
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344 if (vti != NULL) {
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345 sm->set_type(vti);
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346 }
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347 return sm;
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348 }
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349
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350 static size_t calculate_size(verification_type_info* vti) {
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351 return sizeof(u1) + vti->size();
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352 }
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353
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354 static size_t max_size() {
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355 return sizeof(u1) + verification_type_info::max_size();
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356 }
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357
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358 size_t size() const { return calculate_size(types()); }
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359 int offset_delta() const { return frame_type_to_offset_delta(frame_type()); }
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360
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361 void set_offset_delta(int offset_delta) {
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362 assert(offset_delta > 0 && offset_delta <= 64,
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363 "Offset too large for this frame type");
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364 set_frame_type(offset_delta_to_frame_type(offset_delta));
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365 }
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366
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367 void set_type(verification_type_info* vti) {
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368 verification_type_info* cur = types();
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369 cur->copy_from(vti);
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370 }
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371
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372 int number_of_types() const { return 1; }
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373 verification_type_info* types() const {
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374 return verification_type_info::at(type_addr());
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375 }
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376
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377 bool is_valid_offset(int offset_delta) const {
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378 return is_frame_type(offset_delta_to_frame_type(offset_delta));
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379 }
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380
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381 bool verify_subtype(address start, address end) const {
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382 return types()->verify(start, end);
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383 }
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384
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385 #ifdef ASSERT
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386 void print_on(outputStream* st) const {
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387 st->print("same_frame_1_stack_item_frame(%d,", offset_delta());
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388 types()->print_on(st);
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389 st->print(")");
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390 }
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391 #endif
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392 };
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393
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394 class same_frame_1_stack_item_extended : public stack_map_frame {
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395 private:
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396 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); }
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397 address type_addr() const { return offset_delta_addr() + sizeof(u2); }
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398
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399 enum { _frame_id = 247 };
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400
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401 public:
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402 static bool is_frame_type(u1 tag) {
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403 return tag == _frame_id;
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404 }
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405
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406 static same_frame_1_stack_item_extended* at(address addr) {
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407 assert(is_frame_type(*addr), "Wrong frame id");
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408 return (same_frame_1_stack_item_extended*)addr;
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409 }
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410
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411 static same_frame_1_stack_item_extended* create_at(
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412 address addr, int offset_delta, verification_type_info* vti) {
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413 same_frame_1_stack_item_extended* sm =
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414 (same_frame_1_stack_item_extended*)addr;
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415 sm->set_frame_type(_frame_id);
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416 sm->set_offset_delta(offset_delta);
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417 if (vti != NULL) {
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418 sm->set_type(vti);
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419 }
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420 return sm;
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421 }
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422
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423 static size_t calculate_size(verification_type_info* vti) {
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424 return sizeof(u1) + sizeof(u2) + vti->size();
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425 }
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426
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427 size_t size() const { return calculate_size(types()); }
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428 int offset_delta() const {
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429 return Bytes::get_Java_u2(offset_delta_addr()) + 1;
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430 }
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431
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432 void set_offset_delta(int offset_delta) {
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433 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1);
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434 }
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435
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436 void set_type(verification_type_info* vti) {
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437 verification_type_info* cur = types();
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438 cur->copy_from(vti);
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439 }
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440
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441 int number_of_types() const { return 1; }
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442 verification_type_info* types() const {
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443 return verification_type_info::at(type_addr());
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444 }
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445 bool is_valid_offset(int offset) { return true; }
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446
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447 bool verify_subtype(address start, address end) const {
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448 return type_addr() < end && types()->verify(start, end);
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449 }
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450
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451 #ifdef ASSERT
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452 void print_on(outputStream* st) const {
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453 st->print("same_frame_1_stack_item_extended(%d,", offset_delta());
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454 types()->print_on(st);
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455 st->print(")");
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456 }
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457 #endif
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458 };
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459
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460 class chop_frame : public stack_map_frame {
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461 private:
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462 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); }
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463
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464 static int frame_type_to_chops(u1 frame_type) {
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465 int chop = 251 - frame_type;
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466 return chop;
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|
467 }
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468
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469 static u1 chops_to_frame_type(int chop) {
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470 return 251 - chop;
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471 }
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472
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473 public:
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474 static bool is_frame_type(u1 tag) {
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475 return frame_type_to_chops(tag) > 0 && frame_type_to_chops(tag) < 4;
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|
|
476 }
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|
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477
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|
|
478 static chop_frame* at(address addr) {
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|
479 assert(is_frame_type(*addr), "Wrong frame id");
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|
|
480 return (chop_frame*)addr;
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|
|
481 }
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|
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482
|
|
|
483 static chop_frame* create_at(address addr, int offset_delta, int chops) {
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|
|
484 chop_frame* sm = (chop_frame*)addr;
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|
485 sm->set_chops(chops);
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|
|
486 sm->set_offset_delta(offset_delta);
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487 return sm;
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|
488 }
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489
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|
|
490 static size_t calculate_size() {
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|
|
491 return sizeof(u1) + sizeof(u2);
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|
|
492 }
|
|
|
493
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|
|
494 size_t size() const { return calculate_size(); }
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|
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495 int offset_delta() const {
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|
496 return Bytes::get_Java_u2(offset_delta_addr()) + 1;
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|
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497 }
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|
|
498 void set_offset_delta(int offset_delta) {
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|
|
499 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1);
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|
|
500 }
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501
|
|
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502 int chops() const {
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|
|
503 int chops = frame_type_to_chops(frame_type());
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|
|
504 assert(chops > 0 && chops < 4, "Invalid number of chops in frame");
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|
|
505 return chops;
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|
|
506 }
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|
|
507 void set_chops(int chops) {
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|
|
508 assert(chops > 0 && chops <= 3, "Bad number of chops");
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|
|
509 set_frame_type(chops_to_frame_type(chops));
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|
|
510 }
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|
|
511
|
|
|
512 int number_of_types() const { return 0; }
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|
|
513 verification_type_info* types() const { return NULL; }
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|
|
514 bool is_valid_offset(int offset) { return true; }
|
|
|
515
|
|
|
516 bool verify_subtype(address start, address end) const {
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|
|
517 return frame_type_addr() + size() <= end;
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|
|
518 }
|
|
|
519
|
|
|
520 #ifdef ASSERT
|
|
|
521 void print_on(outputStream* st) const {
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|
|
522 st->print("chop_frame(%d,%d)", offset_delta(), chops());
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|
|
523 }
|
|
|
524 #endif
|
|
|
525 };
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|
|
526
|
|
|
527 class append_frame : public stack_map_frame {
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|
|
528 private:
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|
|
529 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); }
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|
|
530 address types_addr() const { return offset_delta_addr() + sizeof(u2); }
|
|
|
531
|
|
|
532 static int frame_type_to_appends(u1 frame_type) {
|
|
|
533 int append = frame_type - 251;
|
|
|
534 return append;
|
|
|
535 }
|
|
|
536
|
|
|
537 static u1 appends_to_frame_type(int appends) {
|
|
|
538 assert(appends > 0 && appends < 4, "Invalid append amount");
|
|
|
539 return 251 + appends;
|
|
|
540 }
|
|
|
541
|
|
|
542 public:
|
|
|
543 static bool is_frame_type(u1 tag) {
|
|
|
544 return frame_type_to_appends(tag) > 0 && frame_type_to_appends(tag) < 4;
|
|
|
545 }
|
|
|
546
|
|
|
547 static append_frame* at(address addr) {
|
|
|
548 assert(is_frame_type(*addr), "Wrong frame id");
|
|
|
549 return (append_frame*)addr;
|
|
|
550 }
|
|
|
551
|
|
|
552 static append_frame* create_at(
|
|
|
553 address addr, int offset_delta, int appends,
|
|
|
554 verification_type_info* types) {
|
|
|
555 append_frame* sm = (append_frame*)addr;
|
|
|
556 sm->set_appends(appends);
|
|
|
557 sm->set_offset_delta(offset_delta);
|
|
|
558 if (types != NULL) {
|
|
|
559 verification_type_info* cur = sm->types();
|
|
|
560 for (int i = 0; i < appends; ++i) {
|
|
|
561 cur->copy_from(types);
|
|
|
562 cur = cur->next();
|
|
|
563 types = types->next();
|
|
|
564 }
|
|
|
565 }
|
|
|
566 return sm;
|
|
|
567 }
|
|
|
568
|
|
|
569 static size_t calculate_size(int appends, verification_type_info* types) {
|
|
|
570 size_t sz = sizeof(u1) + sizeof(u2);
|
|
|
571 for (int i = 0; i < appends; ++i) {
|
|
|
572 sz += types->size();
|
|
|
573 types = types->next();
|
|
|
574 }
|
|
|
575 return sz;
|
|
|
576 }
|
|
|
577
|
|
|
578 static size_t max_size() {
|
|
|
579 return sizeof(u1) + sizeof(u2) + 3 * verification_type_info::max_size();
|
|
|
580 }
|
|
|
581
|
|
|
582 size_t size() const { return calculate_size(number_of_types(), types()); }
|
|
|
583 int offset_delta() const {
|
|
|
584 return Bytes::get_Java_u2(offset_delta_addr()) + 1;
|
|
|
585 }
|
|
|
586
|
|
|
587 void set_offset_delta(int offset_delta) {
|
|
|
588 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1);
|
|
|
589 }
|
|
|
590
|
|
|
591 void set_appends(int appends) {
|
|
|
592 assert(appends > 0 && appends < 4, "Bad number of appends");
|
|
|
593 set_frame_type(appends_to_frame_type(appends));
|
|
|
594 }
|
|
|
595
|
|
|
596 int number_of_types() const {
|
|
|
597 int appends = frame_type_to_appends(frame_type());
|
|
|
598 assert(appends > 0 && appends < 4, "Invalid number of appends in frame");
|
|
|
599 return appends;
|
|
|
600 }
|
|
|
601 verification_type_info* types() const {
|
|
|
602 return verification_type_info::at(types_addr());
|
|
|
603 }
|
|
|
604 bool is_valid_offset(int offset) const { return true; }
|
|
|
605
|
|
|
606 bool verify_subtype(address start, address end) const {
|
|
|
607 verification_type_info* vti = types();
|
|
|
608 if ((address)vti < end && vti->verify(start, end)) {
|
|
|
609 int nof = number_of_types();
|
|
|
610 vti = vti->next();
|
|
|
611 if (nof < 2 || vti->verify(start, end)) {
|
|
|
612 vti = vti->next();
|
|
|
613 if (nof < 3 || vti->verify(start, end)) {
|
|
|
614 return true;
|
|
|
615 }
|
|
|
616 }
|
|
|
617 }
|
|
|
618 return false;
|
|
|
619 }
|
|
|
620
|
|
|
621 #ifdef ASSERT
|
|
|
622 void print_on(outputStream* st) const {
|
|
|
623 st->print("append_frame(%d,", offset_delta());
|
|
|
624 verification_type_info* vti = types();
|
|
|
625 for (int i = 0; i < number_of_types(); ++i) {
|
|
|
626 vti->print_on(st);
|
|
|
627 if (i != number_of_types() - 1) {
|
|
|
628 st->print(",");
|
|
|
629 }
|
|
|
630 vti = vti->next();
|
|
|
631 }
|
|
|
632 st->print(")");
|
|
|
633 }
|
|
|
634 #endif
|
|
|
635 };
|
|
|
636
|
|
|
637 class full_frame : public stack_map_frame {
|
|
|
638 private:
|
|
|
639 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); }
|
|
|
640 address num_locals_addr() const { return offset_delta_addr() + sizeof(u2); }
|
|
|
641 address locals_addr() const { return num_locals_addr() + sizeof(u2); }
|
|
|
642 address stack_slots_addr(address end_of_locals) const {
|
|
|
643 return end_of_locals; }
|
|
|
644 address stack_addr(address end_of_locals) const {
|
|
|
645 return stack_slots_addr(end_of_locals) + sizeof(u2); }
|
|
|
646
|
|
|
647 enum { _frame_id = 255 };
|
|
|
648
|
|
|
649 public:
|
|
|
650 static bool is_frame_type(u1 tag) {
|
|
|
651 return tag == _frame_id;
|
|
|
652 }
|
|
|
653
|
|
|
654 static full_frame* at(address addr) {
|
|
|
655 assert(is_frame_type(*addr), "Wrong frame id");
|
|
|
656 return (full_frame*)addr;
|
|
|
657 }
|
|
|
658
|
|
|
659 static full_frame* create_at(
|
|
|
660 address addr, int offset_delta, int num_locals,
|
|
|
661 verification_type_info* locals,
|
|
|
662 int stack_slots, verification_type_info* stack) {
|
|
|
663 full_frame* sm = (full_frame*)addr;
|
|
|
664 sm->set_frame_type(_frame_id);
|
|
|
665 sm->set_offset_delta(offset_delta);
|
|
|
666 sm->set_num_locals(num_locals);
|
|
|
667 if (locals != NULL) {
|
|
|
668 verification_type_info* cur = sm->locals();
|
|
|
669 for (int i = 0; i < num_locals; ++i) {
|
|
|
670 cur->copy_from(locals);
|
|
|
671 cur = cur->next();
|
|
|
672 locals = locals->next();
|
|
|
673 }
|
|
|
674 address end_of_locals = (address)cur;
|
|
|
675 sm->set_stack_slots(end_of_locals, stack_slots);
|
|
|
676 cur = sm->stack(end_of_locals);
|
|
|
677 for (int i = 0; i < stack_slots; ++i) {
|
|
|
678 cur->copy_from(stack);
|
|
|
679 cur = cur->next();
|
|
|
680 stack = stack->next();
|
|
|
681 }
|
|
|
682 }
|
|
|
683 return sm;
|
|
|
684 }
|
|
|
685
|
|
|
686 static size_t calculate_size(
|
|
|
687 int num_locals, verification_type_info* locals,
|
|
|
688 int stack_slots, verification_type_info* stack) {
|
|
|
689 size_t sz = sizeof(u1) + sizeof(u2) + sizeof(u2) + sizeof(u2);
|
|
|
690 verification_type_info* vti = locals;
|
|
|
691 for (int i = 0; i < num_locals; ++i) {
|
|
|
692 sz += vti->size();
|
|
|
693 vti = vti->next();
|
|
|
694 }
|
|
|
695 vti = stack;
|
|
|
696 for (int i = 0; i < stack_slots; ++i) {
|
|
|
697 sz += vti->size();
|
|
|
698 vti = vti->next();
|
|
|
699 }
|
|
|
700 return sz;
|
|
|
701 }
|
|
|
702
|
|
|
703 static size_t max_size(int locals, int stack) {
|
|
|
704 return sizeof(u1) + 3 * sizeof(u2) +
|
|
|
705 (locals + stack) * verification_type_info::max_size();
|
|
|
706 }
|
|
|
707
|
|
|
708 size_t size() const {
|
|
|
709 address eol = end_of_locals();
|
|
|
710 return calculate_size(num_locals(), locals(), stack_slots(eol), stack(eol));
|
|
|
711 }
|
|
|
712
|
|
|
713 int offset_delta() const {
|
|
|
714 return Bytes::get_Java_u2(offset_delta_addr()) + 1;
|
|
|
715 }
|
|
|
716 int num_locals() const { return Bytes::get_Java_u2(num_locals_addr()); }
|
|
|
717 verification_type_info* locals() const {
|
|
|
718 return verification_type_info::at(locals_addr());
|
|
|
719 }
|
|
|
720 address end_of_locals() const {
|
|
|
721 verification_type_info* vti = locals();
|
|
|
722 for (int i = 0; i < num_locals(); ++i) {
|
|
|
723 vti = vti->next();
|
|
|
724 }
|
|
|
725 return (address)vti;
|
|
|
726 }
|
|
|
727 int stack_slots(address end_of_locals) const {
|
|
|
728 return Bytes::get_Java_u2(stack_slots_addr(end_of_locals));
|
|
|
729 }
|
|
|
730 verification_type_info* stack(address end_of_locals) const {
|
|
|
731 return verification_type_info::at(stack_addr(end_of_locals));
|
|
|
732 }
|
|
|
733
|
|
|
734 void set_offset_delta(int offset_delta) {
|
|
|
735 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1);
|
|
|
736 }
|
|
|
737 void set_num_locals(int num_locals) {
|
|
|
738 Bytes::put_Java_u2(num_locals_addr(), num_locals);
|
|
|
739 }
|
|
|
740 void set_stack_slots(address end_of_locals, int stack_slots) {
|
|
|
741 Bytes::put_Java_u2(stack_slots_addr(end_of_locals), stack_slots);
|
|
|
742 }
|
|
|
743
|
|
|
744 // These return only the locals. Extra processing is required for stack
|
|
|
745 // types of full frames.
|
|
|
746 int number_of_types() const { return num_locals(); }
|
|
|
747 verification_type_info* types() const { return locals(); }
|
|
|
748 bool is_valid_offset(int offset) { return true; }
|
|
|
749
|
|
|
750 bool verify_subtype(address start, address end) const {
|
|
|
751 verification_type_info* vti = types();
|
|
|
752 if ((address)vti >= end) {
|
|
|
753 return false;
|
|
|
754 }
|
|
|
755 int count = number_of_types();
|
|
|
756 for (int i = 0; i < count; ++i) {
|
|
|
757 if (!vti->verify(start, end)) {
|
|
|
758 return false;
|
|
|
759 }
|
|
|
760 vti = vti->next();
|
|
|
761 }
|
|
|
762 address eol = (address)vti;
|
|
|
763 if (eol + sizeof(u2) > end) {
|
|
|
764 return false;
|
|
|
765 }
|
|
|
766 count = stack_slots(eol);
|
|
|
767 vti = stack(eol);
|
|
|
768 for (int i = 0; i < stack_slots(eol); ++i) {
|
|
|
769 if (!vti->verify(start, end)) {
|
|
|
770 return false;
|
|
|
771 }
|
|
|
772 vti = vti->next();
|
|
|
773 }
|
|
|
774 return true;
|
|
|
775 }
|
|
|
776
|
|
|
777 #ifdef ASSERT
|
|
|
778 void print_on(outputStream* st) const {
|
|
|
779 st->print("full_frame(%d,{", offset_delta());
|
|
|
780 verification_type_info* vti = locals();
|
|
|
781 for (int i = 0; i < num_locals(); ++i) {
|
|
|
782 vti->print_on(st);
|
|
|
783 if (i != num_locals() - 1) {
|
|
|
784 st->print(",");
|
|
|
785 }
|
|
|
786 vti = vti->next();
|
|
|
787 }
|
|
|
788 st->print("},{");
|
|
|
789 address end_of_locals = (address)vti;
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790 vti = stack(end_of_locals);
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791 int ss = stack_slots(end_of_locals);
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792 for (int i = 0; i < ss; ++i) {
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|
793 vti->print_on(st);
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794 if (i != ss - 1) {
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|
|
795 st->print(",");
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|
|
796 }
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|
|
797 vti = vti->next();
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|
798 }
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799 st->print("})");
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|
800 }
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801 #endif
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|
802 };
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|
|
803
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804 #define VIRTUAL_DISPATCH(stack_frame_type, func_name, args) \
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805 stack_frame_type* item_##stack_frame_type = as_##stack_frame_type(); \
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806 if (item_##stack_frame_type != NULL) { \
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807 return item_##stack_frame_type->func_name args; \
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808 }
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|
809
|
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|
810 #define VOID_VIRTUAL_DISPATCH(stack_frame_type, func_name, args) \
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|
|
811 stack_frame_type* item_##stack_frame_type = as_##stack_frame_type(); \
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812 if (item_##stack_frame_type != NULL) { \
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813 item_##stack_frame_type->func_name args; \
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814 return; \
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815 }
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816
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817 size_t stack_map_frame::size() const {
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818 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, size, ());
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|
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819 return 0;
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|
820 }
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|
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821
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|
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822 int stack_map_frame::offset_delta() const {
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823 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, offset_delta, ());
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|
|
824 return 0;
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|
825 }
|
|
|
826
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|
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827 void stack_map_frame::set_offset_delta(int offset_delta) {
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|
|
828 FOR_EACH_STACKMAP_FRAME_TYPE(
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|
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829 VOID_VIRTUAL_DISPATCH, set_offset_delta, (offset_delta));
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|
|
830 }
|
|
|
831
|
|
|
832 int stack_map_frame::number_of_types() const {
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|
|
833 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, number_of_types, ());
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|
|
834 return 0;
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|
|
835 }
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|
|
836
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|
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837 verification_type_info* stack_map_frame::types() const {
|
|
|
838 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, types, ());
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|
|
839 return NULL;
|
|
|
840 }
|
|
|
841
|
|
|
842 bool stack_map_frame::is_valid_offset(int offset) const {
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|
|
843 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, is_valid_offset, (offset));
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|
|
844 return true;
|
|
|
845 }
|
|
|
846
|
|
|
847 bool stack_map_frame::verify(address start, address end) const {
|
|
|
848 if (frame_type_addr() >= start && frame_type_addr() < end) {
|
|
|
849 FOR_EACH_STACKMAP_FRAME_TYPE(
|
|
|
850 VIRTUAL_DISPATCH, verify_subtype, (start, end));
|
|
|
851 }
|
|
|
852 return false;
|
|
|
853 }
|
|
|
854
|
|
|
855 #ifdef ASSERT
|
|
|
856 void stack_map_frame::print_on(outputStream* st) const {
|
|
|
857 FOR_EACH_STACKMAP_FRAME_TYPE(VOID_VIRTUAL_DISPATCH, print_on, (st));
|
|
|
858 }
|
|
|
859 #endif
|
|
|
860
|
|
|
861 #undef VIRTUAL_DISPATCH
|
|
|
862 #undef VOID_VIRTUAL_DISPATCH
|
|
|
863
|
|
|
864 #define AS_SUBTYPE_DEF(stack_frame_type, arg1, arg2) \
|
|
|
865 stack_frame_type* stack_map_frame::as_##stack_frame_type() const { \
|
|
|
866 if (stack_frame_type::is_frame_type(frame_type())) { \
|
|
|
867 return (stack_frame_type*)this; \
|
|
|
868 } else { \
|
|
|
869 return NULL; \
|
|
|
870 } \
|
|
|
871 }
|
|
|
872
|
|
|
873 FOR_EACH_STACKMAP_FRAME_TYPE(AS_SUBTYPE_DEF, x, x)
|
|
|
874 #undef AS_SUBTYPE_DEF
|
|
|
875
|
|
|
876 class stack_map_table_attribute {
|
|
|
877 private:
|
|
|
878 address name_index_addr() const {
|
|
|
879 return (address)this; }
|
|
|
880 address attribute_length_addr() const {
|
|
|
881 return name_index_addr() + sizeof(u2); }
|
|
|
882 address number_of_entries_addr() const {
|
|
|
883 return attribute_length_addr() + sizeof(u4); }
|
|
|
884 address entries_addr() const {
|
|
|
885 return number_of_entries_addr() + sizeof(u2); }
|
|
|
886
|
|
|
887 protected:
|
|
|
888 // No constructors - should be 'private', but GCC issues a warning if it is
|
|
|
889 stack_map_table_attribute() {}
|
|
|
890 stack_map_table_attribute(const stack_map_table_attribute&) {}
|
|
|
891
|
|
|
892 public:
|
|
|
893
|
|
|
894 static stack_map_table_attribute* at(address addr) {
|
|
|
895 return (stack_map_table_attribute*)addr;
|
|
|
896 }
|
|
|
897
|
|
|
898 u2 name_index() const {
|
|
|
899 return Bytes::get_Java_u2(name_index_addr()); }
|
|
|
900 u4 attribute_length() const {
|
|
|
901 return Bytes::get_Java_u4(attribute_length_addr()); }
|
|
|
902 u2 number_of_entries() const {
|
|
|
903 return Bytes::get_Java_u2(number_of_entries_addr()); }
|
|
|
904 stack_map_frame* entries() const {
|
|
|
905 return stack_map_frame::at(entries_addr());
|
|
|
906 }
|
|
|
907
|
|
|
908 static size_t header_size() {
|
|
|
909 return sizeof(u2) + sizeof(u4);
|
|
|
910 }
|
|
|
911
|
|
|
912 void set_name_index(u2 idx) {
|
|
|
913 Bytes::put_Java_u2(name_index_addr(), idx);
|
|
|
914 }
|
|
|
915 void set_attribute_length(u4 len) {
|
|
|
916 Bytes::put_Java_u4(attribute_length_addr(), len);
|
|
|
917 }
|
|
|
918 void set_number_of_entries(u2 num) {
|
|
|
919 Bytes::put_Java_u2(number_of_entries_addr(), num);
|
|
|
920 }
|
|
|
921 };
|
|
1972
|
922
|
|
|
923 #endif // SHARE_VM_CLASSFILE_STACKMAPTABLEFORMAT_HPP
|
