annotate src/share/vm/classfile/classFileParser.hpp @ 2416:38fea01eb669

6817525: turn on method handle functionality by default for JSR 292 Summary: After appropriate testing, we need to turn on EnableMethodHandles and EnableInvokeDynamic by default. Reviewed-by: never, kvn, jrose, phh
author twisti
date Thu, 31 Mar 2011 02:31:57 -0700
parents c7f3d0b4570f
children e6b1331a51d2
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1 /*
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2 * Copyright (c) 1997, 2011, 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 #ifndef SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP
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26 #define SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP
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27
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28 #include "classfile/classFileStream.hpp"
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29 #include "memory/resourceArea.hpp"
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30 #include "oops/oop.inline.hpp"
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31 #include "oops/typeArrayOop.hpp"
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32 #include "runtime/handles.inline.hpp"
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33 #include "utilities/accessFlags.hpp"
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34
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35 class TempNewSymbol;
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36 // Parser for for .class files
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37 //
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38 // The bytes describing the class file structure is read from a Stream object
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39
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40 class ClassFileParser VALUE_OBJ_CLASS_SPEC {
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41 private:
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42 bool _need_verify;
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43 bool _relax_verify;
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44 u2 _major_version;
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45 u2 _minor_version;
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46 Symbol* _class_name;
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47 KlassHandle _host_klass;
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48 GrowableArray<Handle>* _cp_patches; // overrides for CP entries
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49
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50 bool _has_finalizer;
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51 bool _has_empty_finalizer;
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52 bool _has_vanilla_constructor;
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53
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54 int _max_bootstrap_specifier_index;
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55
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56 enum { fixed_buffer_size = 128 };
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57 u_char linenumbertable_buffer[fixed_buffer_size];
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58
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59 ClassFileStream* _stream; // Actual input stream
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60
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61 enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names
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62
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63 // Accessors
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64 ClassFileStream* stream() { return _stream; }
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65 void set_stream(ClassFileStream* st) { _stream = st; }
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66
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67 // Constant pool parsing
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68 void parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS);
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69
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70 constantPoolHandle parse_constant_pool(TRAPS);
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71
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72 // Interface parsing
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73 objArrayHandle parse_interfaces(constantPoolHandle cp,
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74 int length,
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75 Handle class_loader,
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76 Handle protection_domain,
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77 Symbol* class_name,
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78 TRAPS);
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79
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80 // Field parsing
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81 void parse_field_attributes(constantPoolHandle cp, u2 attributes_count,
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82 bool is_static, u2 signature_index,
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83 u2* constantvalue_index_addr,
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84 bool* is_synthetic_addr,
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85 u2* generic_signature_index_addr,
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86 typeArrayHandle* field_annotations, TRAPS);
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87 typeArrayHandle parse_fields(constantPoolHandle cp, bool is_interface,
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88 struct FieldAllocationCount *fac,
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89 objArrayHandle* fields_annotations, TRAPS);
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90
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91 // Method parsing
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92 methodHandle parse_method(constantPoolHandle cp, bool is_interface,
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93 AccessFlags* promoted_flags,
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94 typeArrayHandle* method_annotations,
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95 typeArrayHandle* method_parameter_annotations,
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96 typeArrayHandle* method_default_annotations,
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97 TRAPS);
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98 objArrayHandle parse_methods (constantPoolHandle cp, bool is_interface,
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99 AccessFlags* promoted_flags,
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100 bool* has_final_method,
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101 objArrayOop* methods_annotations_oop,
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102 objArrayOop* methods_parameter_annotations_oop,
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103 objArrayOop* methods_default_annotations_oop,
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104 TRAPS);
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105 typeArrayHandle sort_methods (objArrayHandle methods,
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106 objArrayHandle methods_annotations,
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107 objArrayHandle methods_parameter_annotations,
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108 objArrayHandle methods_default_annotations,
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109 TRAPS);
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110 typeArrayHandle parse_exception_table(u4 code_length, u4 exception_table_length,
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111 constantPoolHandle cp, TRAPS);
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112 void parse_linenumber_table(
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113 u4 code_attribute_length, u4 code_length,
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114 CompressedLineNumberWriteStream** write_stream, TRAPS);
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115 u2* parse_localvariable_table(u4 code_length, u2 max_locals, u4 code_attribute_length,
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116 constantPoolHandle cp, u2* localvariable_table_length,
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117 bool isLVTT, TRAPS);
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118 u2* parse_checked_exceptions(u2* checked_exceptions_length, u4 method_attribute_length,
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119 constantPoolHandle cp, TRAPS);
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120 void parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
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121 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS);
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122 typeArrayOop parse_stackmap_table(u4 code_attribute_length, TRAPS);
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123
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124 // Classfile attribute parsing
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125 void parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
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126 void parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
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127 instanceKlassHandle k, int length, TRAPS);
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128 u2 parse_classfile_inner_classes_attribute(constantPoolHandle cp,
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129 instanceKlassHandle k, TRAPS);
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130 void parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
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131 void parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
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132 void parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
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133 void parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k, u4 attribute_length, TRAPS);
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134
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135 // Annotations handling
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136 typeArrayHandle assemble_annotations(u1* runtime_visible_annotations,
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137 int runtime_visible_annotations_length,
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138 u1* runtime_invisible_annotations,
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139 int runtime_invisible_annotations_length, TRAPS);
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140
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141 // Final setup
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142 unsigned int compute_oop_map_count(instanceKlassHandle super,
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143 unsigned int nonstatic_oop_count,
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144 int first_nonstatic_oop_offset);
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145 void fill_oop_maps(instanceKlassHandle k,
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146 unsigned int nonstatic_oop_map_count,
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147 int* nonstatic_oop_offsets,
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148 unsigned int* nonstatic_oop_counts);
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149 void set_precomputed_flags(instanceKlassHandle k);
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150 objArrayHandle compute_transitive_interfaces(instanceKlassHandle super,
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151 objArrayHandle local_ifs, TRAPS);
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152
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153 // Special handling for certain classes.
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154 // Add the "discovered" field to java.lang.ref.Reference if
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155 // it does not exist.
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156 void java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr,
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157 constantPoolHandle cp,
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158 FieldAllocationCount *fac_ptr, TRAPS);
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159 // Adjust the field allocation counts for java.lang.Class to add
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160 // fake fields.
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161 void java_lang_Class_fix_pre(int* nonstatic_field_size,
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162 FieldAllocationCount *fac_ptr);
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163 // Adjust the next_nonstatic_oop_offset to place the fake fields
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164 // before any Java fields.
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165 void java_lang_Class_fix_post(int* next_nonstatic_oop_offset);
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166 // Adjust the field allocation counts for java.lang.invoke.MethodHandle to add
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167 // a fake address (void*) field.
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168 void java_lang_invoke_MethodHandle_fix_pre(constantPoolHandle cp,
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169 typeArrayHandle fields,
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170 FieldAllocationCount *fac_ptr, TRAPS);
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171
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172 // Format checker methods
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173 void classfile_parse_error(const char* msg, TRAPS);
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174 void classfile_parse_error(const char* msg, int index, TRAPS);
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175 void classfile_parse_error(const char* msg, const char *name, TRAPS);
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176 void classfile_parse_error(const char* msg, int index, const char *name, TRAPS);
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177 inline void guarantee_property(bool b, const char* msg, TRAPS) {
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178 if (!b) { classfile_parse_error(msg, CHECK); }
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179 }
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180
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181 inline void assert_property(bool b, const char* msg, TRAPS) {
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182 #ifdef ASSERT
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183 if (!b) { fatal(msg); }
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184 #endif
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185 }
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186
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187 inline void check_property(bool property, const char* msg, int index, TRAPS) {
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188 if (_need_verify) {
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189 guarantee_property(property, msg, index, CHECK);
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190 } else {
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191 assert_property(property, msg, CHECK);
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192 }
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193 }
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194
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195 inline void check_property(bool property, const char* msg, TRAPS) {
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196 if (_need_verify) {
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197 guarantee_property(property, msg, CHECK);
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198 } else {
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199 assert_property(property, msg, CHECK);
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200 }
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201 }
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202
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203 inline void guarantee_property(bool b, const char* msg, int index, TRAPS) {
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204 if (!b) { classfile_parse_error(msg, index, CHECK); }
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205 }
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206 inline void guarantee_property(bool b, const char* msg, const char *name, TRAPS) {
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207 if (!b) { classfile_parse_error(msg, name, CHECK); }
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208 }
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209 inline void guarantee_property(bool b, const char* msg, int index, const char *name, TRAPS) {
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210 if (!b) { classfile_parse_error(msg, index, name, CHECK); }
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211 }
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212
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213 void throwIllegalSignature(
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214 const char* type, Symbol* name, Symbol* sig, TRAPS);
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215
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216 bool is_supported_version(u2 major, u2 minor);
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217 bool has_illegal_visibility(jint flags);
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218
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219 void verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS);
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220 void verify_legal_utf8(const unsigned char* buffer, int length, TRAPS);
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221 void verify_legal_class_name(Symbol* name, TRAPS);
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222 void verify_legal_field_name(Symbol* name, TRAPS);
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223 void verify_legal_method_name(Symbol* name, TRAPS);
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224 void verify_legal_field_signature(Symbol* fieldname, Symbol* signature, TRAPS);
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225 int verify_legal_method_signature(Symbol* methodname, Symbol* signature, TRAPS);
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226 void verify_legal_class_modifiers(jint flags, TRAPS);
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227 void verify_legal_field_modifiers(jint flags, bool is_interface, TRAPS);
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228 void verify_legal_method_modifiers(jint flags, bool is_interface, Symbol* name, TRAPS);
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229 bool verify_unqualified_name(char* name, unsigned int length, int type);
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230 char* skip_over_field_name(char* name, bool slash_ok, unsigned int length);
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231 char* skip_over_field_signature(char* signature, bool void_ok, unsigned int length, TRAPS);
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232
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233 bool is_anonymous() {
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234 assert(EnableInvokeDynamic || _host_klass.is_null(), "");
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235 return _host_klass.not_null();
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236 }
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237 bool has_cp_patch_at(int index) {
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238 assert(EnableInvokeDynamic, "");
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239 assert(index >= 0, "oob");
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240 return (_cp_patches != NULL
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241 && index < _cp_patches->length()
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242 && _cp_patches->adr_at(index)->not_null());
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243 }
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244 Handle cp_patch_at(int index) {
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245 assert(has_cp_patch_at(index), "oob");
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246 return _cp_patches->at(index);
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247 }
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248 Handle clear_cp_patch_at(int index) {
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249 Handle patch = cp_patch_at(index);
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250 _cp_patches->at_put(index, Handle());
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251 assert(!has_cp_patch_at(index), "");
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252 return patch;
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253 }
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254 void patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS);
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255
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256 // Wrapper for constantTag.is_klass_[or_]reference.
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257 // In older versions of the VM, klassOops cannot sneak into early phases of
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258 // constant pool construction, but in later versions they can.
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259 // %%% Let's phase out the old is_klass_reference.
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260 bool is_klass_reference(constantPoolHandle cp, int index) {
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261 return ((LinkWellKnownClasses || EnableInvokeDynamic)
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262 ? cp->tag_at(index).is_klass_or_reference()
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263 : cp->tag_at(index).is_klass_reference());
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264 }
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265
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266 public:
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267 // Constructor
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268 ClassFileParser(ClassFileStream* st) { set_stream(st); }
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269
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270 // Parse .class file and return new klassOop. The klassOop is not hooked up
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271 // to the system dictionary or any other structures, so a .class file can
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272 // be loaded several times if desired.
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273 // The system dictionary hookup is done by the caller.
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274 //
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275 // "parsed_name" is updated by this method, and is the name found
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276 // while parsing the stream.
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277 instanceKlassHandle parseClassFile(Symbol* name,
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278 Handle class_loader,
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279 Handle protection_domain,
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280 TempNewSymbol& parsed_name,
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281 bool verify,
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282 TRAPS) {
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283 KlassHandle no_host_klass;
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284 return parseClassFile(name, class_loader, protection_domain, no_host_klass, NULL, parsed_name, verify, THREAD);
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285 }
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286 instanceKlassHandle parseClassFile(Symbol* name,
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287 Handle class_loader,
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288 Handle protection_domain,
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289 KlassHandle host_klass,
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290 GrowableArray<Handle>* cp_patches,
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291 TempNewSymbol& parsed_name,
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292 bool verify,
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293 TRAPS);
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294
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295 // Verifier checks
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296 static void check_super_class_access(instanceKlassHandle this_klass, TRAPS);
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297 static void check_super_interface_access(instanceKlassHandle this_klass, TRAPS);
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298 static void check_final_method_override(instanceKlassHandle this_klass, TRAPS);
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299 static void check_illegal_static_method(instanceKlassHandle this_klass, TRAPS);
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300 };
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301
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302 #endif // SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP