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annotate src/share/vm/classfile/classFileParser.hpp @ 6853:d804e148cff8

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Merge
author kvn
date Fri, 12 Oct 2012 09:22:52 -0700
parents d8ce2825b193 19eb999cb72c
children 4735d2c84362
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1 /*
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2 * Copyright (c) 1997, 2012, 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 #include "classfile/symbolTable.hpp"
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35
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36 class FieldAllocationCount;
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37
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38
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39 // Parser for for .class files
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40 //
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41 // The bytes describing the class file structure is read from a Stream object
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42
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43 class ClassFileParser VALUE_OBJ_CLASS_SPEC {
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44 private:
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45 bool _need_verify;
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46 bool _relax_verify;
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47 u2 _major_version;
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48 u2 _minor_version;
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49 Symbol* _class_name;
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50 KlassHandle _host_klass;
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51 GrowableArray<Handle>* _cp_patches; // overrides for CP entries
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52
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53 // precomputed flags
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54 bool _has_finalizer;
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55 bool _has_empty_finalizer;
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56 bool _has_vanilla_constructor;
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57 int _max_bootstrap_specifier_index; // detects BSS values
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58
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59 // class attributes parsed before the instance klass is created:
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60 bool _synthetic_flag;
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61 Symbol* _sourcefile;
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62 Symbol* _generic_signature;
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63 char* _sde_buffer;
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64 int _sde_length;
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65 Array<u2>* _inner_classes;
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66 AnnotationArray* _annotations;
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67
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68 void set_class_synthetic_flag(bool x) { _synthetic_flag = x; }
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69 void set_class_sourcefile(Symbol* x) { _sourcefile = x; }
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70 void set_class_generic_signature(Symbol* x) { _generic_signature = x; }
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71 void set_class_sde_buffer(char* x, int len) { _sde_buffer = x; _sde_length = len; }
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72 void set_class_inner_classes(Array<u2>* x) { _inner_classes = x; }
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73 void set_class_annotations(AnnotationArray* x) { _annotations = x; }
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74 void init_parsed_class_attributes() {
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75 _synthetic_flag = false;
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76 _sourcefile = NULL;
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77 _generic_signature = NULL;
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78 _sde_buffer = NULL;
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79 _sde_length = 0;
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80 // initialize the other flags too:
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81 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
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82 _max_bootstrap_specifier_index = -1;
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83 }
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84 void apply_parsed_class_attributes(instanceKlassHandle k); // update k
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85
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86 class AnnotationCollector {
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87 public:
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88 enum Location { _in_field, _in_method, _in_class };
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89 enum ID {
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90 _unknown = 0,
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91 _method_ForceInline,
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92 _method_DontInline,
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93 _method_LambdaForm_Compiled,
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94 _method_LambdaForm_Hidden,
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95 _annotation_LIMIT
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96 };
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97 const Location _location;
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98 int _annotations_present;
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99 AnnotationCollector(Location location)
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100 : _location(location), _annotations_present(0)
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101 {
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102 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
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103 }
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104 // If this annotation name has an ID, report it (or _none).
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105 ID annotation_index(Symbol* name);
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106 // Set the annotation name:
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107 void set_annotation(ID id) {
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108 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
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109 _annotations_present |= nth_bit((int)id);
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110 }
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111 // Report if the annotation is present.
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112 bool has_any_annotations() { return _annotations_present != 0; }
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113 bool has_annotation(ID id) { return (nth_bit((int)id) & _annotations_present) != 0; }
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114 };
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115 class FieldAnnotationCollector: public AnnotationCollector {
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116 public:
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117 FieldAnnotationCollector() : AnnotationCollector(_in_field) { }
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118 void apply_to(FieldInfo* f);
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119 };
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120 class MethodAnnotationCollector: public AnnotationCollector {
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121 public:
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122 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
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123 void apply_to(methodHandle m);
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124 };
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125 class ClassAnnotationCollector: public AnnotationCollector {
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126 public:
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127 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
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128 void apply_to(instanceKlassHandle k);
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129 };
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130
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131 enum { fixed_buffer_size = 128 };
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132 u_char linenumbertable_buffer[fixed_buffer_size];
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133
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134 ClassFileStream* _stream; // Actual input stream
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135
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136 enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names
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137
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138 // Accessors
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139 ClassFileStream* stream() { return _stream; }
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140 void set_stream(ClassFileStream* st) { _stream = st; }
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141
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142 // Constant pool parsing
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143 void parse_constant_pool_entries(ClassLoaderData* loader_data,
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144 constantPoolHandle cp, int length, TRAPS);
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145
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146 constantPoolHandle parse_constant_pool(ClassLoaderData* loader_data, TRAPS);
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147
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148 // Interface parsing
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149 Array<Klass*>* parse_interfaces(constantPoolHandle cp,
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150 int length,
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151 ClassLoaderData* loader_data,
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152 Handle protection_domain,
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153 Symbol* class_name,
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154 TRAPS);
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155 void record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS);
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156
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157 // Field parsing
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158 void parse_field_attributes(ClassLoaderData* loader_data,
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159 constantPoolHandle cp, u2 attributes_count,
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160 bool is_static, u2 signature_index,
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161 u2* constantvalue_index_addr,
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162 bool* is_synthetic_addr,
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163 u2* generic_signature_index_addr,
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164 AnnotationArray** field_annotations,
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165 FieldAnnotationCollector* parsed_annotations,
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166 TRAPS);
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167 Array<u2>* parse_fields(ClassLoaderData* loader_data,
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168 Symbol* class_name,
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169 constantPoolHandle cp, bool is_interface,
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170 FieldAllocationCount *fac,
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171 Array<AnnotationArray*>** fields_annotations,
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172 u2* java_fields_count_ptr, TRAPS);
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173
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174 // Method parsing
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175 methodHandle parse_method(ClassLoaderData* loader_data,
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176 constantPoolHandle cp,
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177 bool is_interface,
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178 AccessFlags* promoted_flags,
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179 AnnotationArray** method_annotations,
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180 AnnotationArray** method_parameter_annotations,
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181 AnnotationArray** method_default_annotations,
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182 TRAPS);
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183 Array<Method*>* parse_methods(ClassLoaderData* loader_data,
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184 constantPoolHandle cp,
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185 bool is_interface,
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186 AccessFlags* promoted_flags,
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187 bool* has_final_method,
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188 Array<AnnotationArray*>** methods_annotations,
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189 Array<AnnotationArray*>** methods_parameter_annotations,
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190 Array<AnnotationArray*>** methods_default_annotations,
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191 TRAPS);
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192 Array<int>* sort_methods(ClassLoaderData* loader_data,
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193 Array<Method*>* methods,
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194 Array<AnnotationArray*>* methods_annotations,
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195 Array<AnnotationArray*>* methods_parameter_annotations,
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196 Array<AnnotationArray*>* methods_default_annotations,
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197 TRAPS);
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198 u2* parse_exception_table(ClassLoaderData* loader_data,
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199 u4 code_length, u4 exception_table_length,
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200 constantPoolHandle cp, TRAPS);
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201 void parse_linenumber_table(
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202 u4 code_attribute_length, u4 code_length,
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203 CompressedLineNumberWriteStream** write_stream, TRAPS);
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204 u2* parse_localvariable_table(u4 code_length, u2 max_locals, u4 code_attribute_length,
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205 constantPoolHandle cp, u2* localvariable_table_length,
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206 bool isLVTT, TRAPS);
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207 u2* parse_checked_exceptions(u2* checked_exceptions_length, u4 method_attribute_length,
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208 constantPoolHandle cp, TRAPS);
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209 void parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
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210 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS);
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211 Array<u1>* parse_stackmap_table(ClassLoaderData* loader_data, u4 code_attribute_length, TRAPS);
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212
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213 // Classfile attribute parsing
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214 void parse_classfile_sourcefile_attribute(constantPoolHandle cp, TRAPS);
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215 void parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
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216 int length, TRAPS);
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217 u2 parse_classfile_inner_classes_attribute(ClassLoaderData* loader_data,
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218 u1* inner_classes_attribute_start,
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219 bool parsed_enclosingmethod_attribute,
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220 u2 enclosing_method_class_index,
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221 u2 enclosing_method_method_index,
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222 constantPoolHandle cp,
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223 TRAPS);
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224 void parse_classfile_attributes(ClassLoaderData* loader_data,
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225 constantPoolHandle cp,
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226 ClassAnnotationCollector* parsed_annotations,
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227 TRAPS);
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228 void parse_classfile_synthetic_attribute(constantPoolHandle cp, TRAPS);
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229 void parse_classfile_signature_attribute(constantPoolHandle cp, TRAPS);
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230 void parse_classfile_bootstrap_methods_attribute(ClassLoaderData* loader_data, constantPoolHandle cp, u4 attribute_length, TRAPS);
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231
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232 // Annotations handling
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233 AnnotationArray* assemble_annotations(ClassLoaderData* loader_data,
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234 u1* runtime_visible_annotations,
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235 int runtime_visible_annotations_length,
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236 u1* runtime_invisible_annotations,
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237 int runtime_invisible_annotations_length, TRAPS);
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238 int skip_annotation(u1* buffer, int limit, int index);
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239 int skip_annotation_value(u1* buffer, int limit, int index);
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240 void parse_annotations(u1* buffer, int limit, constantPoolHandle cp,
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241 /* Results (currently, only one result is supported): */
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242 AnnotationCollector* result,
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243 TRAPS);
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244
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245 // Final setup
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246 unsigned int compute_oop_map_count(instanceKlassHandle super,
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247 unsigned int nonstatic_oop_count,
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248 int first_nonstatic_oop_offset);
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249 void fill_oop_maps(instanceKlassHandle k,
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250 unsigned int nonstatic_oop_map_count,
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251 int* nonstatic_oop_offsets,
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252 unsigned int* nonstatic_oop_counts);
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253 void set_precomputed_flags(instanceKlassHandle k);
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254 Array<Klass*>* compute_transitive_interfaces(ClassLoaderData* loader_data,
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255 instanceKlassHandle super,
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256 Array<Klass*>* local_ifs, TRAPS);
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257
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258 // Format checker methods
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259 void classfile_parse_error(const char* msg, TRAPS);
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260 void classfile_parse_error(const char* msg, int index, TRAPS);
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261 void classfile_parse_error(const char* msg, const char *name, TRAPS);
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262 void classfile_parse_error(const char* msg, int index, const char *name, TRAPS);
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263 inline void guarantee_property(bool b, const char* msg, TRAPS) {
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264 if (!b) { classfile_parse_error(msg, CHECK); }
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265 }
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266
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267 inline void assert_property(bool b, const char* msg, TRAPS) {
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268 #ifdef ASSERT
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269 if (!b) { fatal(msg); }
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270 #endif
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271 }
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272
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273 inline void check_property(bool property, const char* msg, int index, TRAPS) {
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274 if (_need_verify) {
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275 guarantee_property(property, msg, index, CHECK);
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276 } else {
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277 assert_property(property, msg, CHECK);
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278 }
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279 }
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280
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281 inline void check_property(bool property, const char* msg, TRAPS) {
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282 if (_need_verify) {
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283 guarantee_property(property, msg, CHECK);
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284 } else {
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285 assert_property(property, msg, CHECK);
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286 }
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287 }
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288
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289 inline void guarantee_property(bool b, const char* msg, int index, TRAPS) {
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290 if (!b) { classfile_parse_error(msg, index, CHECK); }
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291 }
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292 inline void guarantee_property(bool b, const char* msg, const char *name, TRAPS) {
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293 if (!b) { classfile_parse_error(msg, name, CHECK); }
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294 }
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295 inline void guarantee_property(bool b, const char* msg, int index, const char *name, TRAPS) {
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296 if (!b) { classfile_parse_error(msg, index, name, CHECK); }
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297 }
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298
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299 void throwIllegalSignature(
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300 const char* type, Symbol* name, Symbol* sig, TRAPS);
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301
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302 bool is_supported_version(u2 major, u2 minor);
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303 bool has_illegal_visibility(jint flags);
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304
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305 void verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS);
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306 void verify_legal_utf8(const unsigned char* buffer, int length, TRAPS);
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307 void verify_legal_class_name(Symbol* name, TRAPS);
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308 void verify_legal_field_name(Symbol* name, TRAPS);
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309 void verify_legal_method_name(Symbol* name, TRAPS);
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310 void verify_legal_field_signature(Symbol* fieldname, Symbol* signature, TRAPS);
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311 int verify_legal_method_signature(Symbol* methodname, Symbol* signature, TRAPS);
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312 void verify_legal_class_modifiers(jint flags, TRAPS);
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313 void verify_legal_field_modifiers(jint flags, bool is_interface, TRAPS);
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314 void verify_legal_method_modifiers(jint flags, bool is_interface, Symbol* name, TRAPS);
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315 bool verify_unqualified_name(char* name, unsigned int length, int type);
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316 char* skip_over_field_name(char* name, bool slash_ok, unsigned int length);
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317 char* skip_over_field_signature(char* signature, bool void_ok, unsigned int length, TRAPS);
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318
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319 bool is_anonymous() {
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320 assert(EnableInvokeDynamic || _host_klass.is_null(), "");
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321 return _host_klass.not_null();
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322 }
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323 bool has_cp_patch_at(int index) {
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324 assert(EnableInvokeDynamic, "");
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325 assert(index >= 0, "oob");
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326 return (_cp_patches != NULL
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327 && index < _cp_patches->length()
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328 && _cp_patches->adr_at(index)->not_null());
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329 }
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330 Handle cp_patch_at(int index) {
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331 assert(has_cp_patch_at(index), "oob");
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332 return _cp_patches->at(index);
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333 }
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334 Handle clear_cp_patch_at(int index) {
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335 Handle patch = cp_patch_at(index);
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336 _cp_patches->at_put(index, Handle());
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337 assert(!has_cp_patch_at(index), "");
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338 return patch;
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339 }
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340 void patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS);
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341
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342 // Wrapper for constantTag.is_klass_[or_]reference.
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343 // In older versions of the VM, Klass*s cannot sneak into early phases of
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344 // constant pool construction, but in later versions they can.
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345 // %%% Let's phase out the old is_klass_reference.
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346 bool is_klass_reference(constantPoolHandle cp, int index) {
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347 return (EnableInvokeDynamic
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348 ? cp->tag_at(index).is_klass_or_reference()
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349 : cp->tag_at(index).is_klass_reference());
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350 }
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351
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352 public:
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353 // Constructor
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354 ClassFileParser(ClassFileStream* st) { set_stream(st); }
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355
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356 // Parse .class file and return new Klass*. The Klass* is not hooked up
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357 // to the system dictionary or any other structures, so a .class file can
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358 // be loaded several times if desired.
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359 // The system dictionary hookup is done by the caller.
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360 //
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361 // "parsed_name" is updated by this method, and is the name found
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362 // while parsing the stream.
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363 instanceKlassHandle parseClassFile(Symbol* name,
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364 Handle class_loader,
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365 Handle protection_domain,
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366 TempNewSymbol& parsed_name,
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367 bool verify,
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368 TRAPS) {
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369 KlassHandle no_host_klass;
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370 return parseClassFile(name, class_loader, protection_domain, no_host_klass, NULL, parsed_name, verify, THREAD);
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371 }
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372 instanceKlassHandle parseClassFile(Symbol* name,
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373 Handle class_loader,
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374 Handle protection_domain,
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375 KlassHandle host_klass,
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376 GrowableArray<Handle>* cp_patches,
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377 TempNewSymbol& parsed_name,
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378 bool verify,
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379 TRAPS);
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380
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381 // Verifier checks
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382 static void check_super_class_access(instanceKlassHandle this_klass, TRAPS);
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383 static void check_super_interface_access(instanceKlassHandle this_klass, TRAPS);
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384 static void check_final_method_override(instanceKlassHandle this_klass, TRAPS);
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385 static void check_illegal_static_method(instanceKlassHandle this_klass, TRAPS);
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386 };
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387
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388 #endif // SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP