Mercurial > hg > truffle
annotate src/share/vm/classfile/verifier.hpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
| author | coleenp |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | f95d63e2154a |
| children | 1d1603768966 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
973
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
973
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
973
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_CLASSFILE_VERIFIER_HPP |
| 26 #define SHARE_VM_CLASSFILE_VERIFIER_HPP | |
| 27 | |
| 28 #include "classfile/verificationType.hpp" | |
| 29 #include "memory/gcLocker.hpp" | |
| 30 #include "oops/klass.hpp" | |
| 31 #include "oops/methodOop.hpp" | |
| 32 #include "runtime/handles.hpp" | |
| 33 #include "utilities/exceptions.hpp" | |
| 34 | |
| 0 | 35 // The verifier class |
| 36 class Verifier : AllStatic { | |
| 37 public: | |
| 1602 | 38 enum { |
| 39 STACKMAP_ATTRIBUTE_MAJOR_VERSION = 50, | |
| 40 INVOKEDYNAMIC_MAJOR_VERSION = 51 | |
| 41 }; | |
| 0 | 42 typedef enum { ThrowException, NoException } Mode; |
| 43 | |
| 44 /** | |
| 45 * Verify the bytecodes for a class. If 'throw_exception' is true | |
| 46 * then the appropriate VerifyError or ClassFormatError will be thrown. | |
| 47 * Otherwise, no exception is thrown and the return indicates the | |
| 48 * error. | |
| 49 */ | |
|
973
ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
acorn
parents:
0
diff
changeset
|
50 static bool verify(instanceKlassHandle klass, Mode mode, bool should_verify_class, TRAPS); |
| 0 | 51 |
|
973
ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
acorn
parents:
0
diff
changeset
|
52 // Return false if the class is loaded by the bootstrap loader, |
|
ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
acorn
parents:
0
diff
changeset
|
53 // or if defineClass was called requesting skipping verification |
|
ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
acorn
parents:
0
diff
changeset
|
54 // -Xverify:all/none override this value |
|
ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
acorn
parents:
0
diff
changeset
|
55 static bool should_verify_for(oop class_loader, bool should_verify_class); |
| 0 | 56 |
| 57 // Relax certain verifier checks to enable some broken 1.1 apps to run on 1.2. | |
| 58 static bool relax_verify_for(oop class_loader); | |
| 59 | |
| 60 private: | |
|
973
ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
acorn
parents:
0
diff
changeset
|
61 static bool is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class); |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
62 static Symbol* inference_verify( |
| 0 | 63 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS); |
| 64 }; | |
| 65 | |
| 66 class RawBytecodeStream; | |
| 67 class StackMapFrame; | |
| 68 class StackMapTable; | |
| 69 | |
| 70 // Summary of verifier's memory usage: | |
| 71 // StackMapTable is stack allocated. | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
72 // StackMapFrame are resource allocated. There is only one ResourceMark |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
73 // for each class verification, which is created at the top level. |
| 0 | 74 // There is one mutable StackMapFrame (current_frame) which is updated |
| 75 // by abstract bytecode interpretation. frame_in_exception_handler() returns | |
| 76 // a frame that has a mutable one-item stack (ready for pushing the | |
| 77 // catch type exception object). All the other StackMapFrame's | |
| 78 // are immutable (including their locals and stack arrays) after | |
| 79 // their constructions. | |
| 80 // locals/stack arrays in StackMapFrame are resource allocated. | |
| 81 // locals/stack arrays can be shared between StackMapFrame's, except | |
| 82 // the mutable StackMapFrame (current_frame). | |
| 83 | |
| 84 // These macros are used similarly to CHECK macros but also check | |
| 85 // the status of the verifier and return if that has an error. | |
| 86 #define CHECK_VERIFY(verifier) \ | |
| 87 CHECK); if ((verifier)->has_error()) return; (0 | |
| 88 #define CHECK_VERIFY_(verifier, result) \ | |
| 89 CHECK_(result)); if ((verifier)->has_error()) return (result); (0 | |
| 90 | |
| 91 // A new instance of this class is created for each class being verified | |
| 92 class ClassVerifier : public StackObj { | |
| 93 private: | |
| 94 Thread* _thread; | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
95 Symbol* _exception_type; |
| 0 | 96 char* _message; |
| 97 size_t _message_buffer_len; | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
98 GrowableArray<Symbol*>* _symbols; // keep a list of symbols created |
| 0 | 99 |
| 100 void verify_method(methodHandle method, TRAPS); | |
| 101 char* generate_code_data(methodHandle m, u4 code_length, TRAPS); | |
| 102 void verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS); | |
| 103 void verify_local_variable_table(u4 code_length, char* code_data, TRAPS); | |
| 104 | |
| 105 VerificationType cp_ref_index_to_type( | |
| 106 int index, constantPoolHandle cp, TRAPS) { | |
| 107 return cp_index_to_type(cp->klass_ref_index_at(index), cp, THREAD); | |
| 108 } | |
| 109 | |
| 110 bool is_protected_access( | |
| 111 instanceKlassHandle this_class, klassOop target_class, | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
112 Symbol* field_name, Symbol* field_sig, bool is_method); |
| 0 | 113 |
| 114 void verify_cp_index(constantPoolHandle cp, int index, TRAPS); | |
| 115 void verify_cp_type( | |
| 116 int index, constantPoolHandle cp, unsigned int types, TRAPS); | |
| 117 void verify_cp_class_type(int index, constantPoolHandle cp, TRAPS); | |
| 118 | |
| 119 u2 verify_stackmap_table( | |
| 120 u2 stackmap_index, u2 bci, StackMapFrame* current_frame, | |
| 121 StackMapTable* stackmap_table, bool no_control_flow, TRAPS); | |
| 122 | |
| 123 void verify_exception_handler_targets( | |
| 124 u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
| 125 StackMapTable* stackmap_table, TRAPS); | |
| 126 | |
| 127 void verify_ldc( | |
| 128 int opcode, u2 index, StackMapFrame *current_frame, | |
| 129 constantPoolHandle cp, u2 bci, TRAPS); | |
| 130 | |
| 131 void verify_switch( | |
| 132 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
| 133 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS); | |
| 134 | |
| 135 void verify_field_instructions( | |
| 136 RawBytecodeStream* bcs, StackMapFrame* current_frame, | |
| 137 constantPoolHandle cp, TRAPS); | |
| 138 | |
| 139 void verify_invoke_init( | |
| 140 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
| 141 StackMapFrame* current_frame, u4 code_length, bool* this_uninit, | |
| 142 constantPoolHandle cp, TRAPS); | |
| 143 | |
| 144 void verify_invoke_instructions( | |
| 145 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
| 146 bool* this_uninit, VerificationType return_type, | |
| 147 constantPoolHandle cp, TRAPS); | |
| 148 | |
| 149 VerificationType get_newarray_type(u2 index, u2 bci, TRAPS); | |
| 150 void verify_anewarray( | |
| 151 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS); | |
| 152 void verify_return_value( | |
| 153 VerificationType return_type, VerificationType type, u2 offset, TRAPS); | |
| 154 | |
| 155 void verify_iload (u2 index, StackMapFrame* current_frame, TRAPS); | |
| 156 void verify_lload (u2 index, StackMapFrame* current_frame, TRAPS); | |
| 157 void verify_fload (u2 index, StackMapFrame* current_frame, TRAPS); | |
| 158 void verify_dload (u2 index, StackMapFrame* current_frame, TRAPS); | |
| 159 void verify_aload (u2 index, StackMapFrame* current_frame, TRAPS); | |
| 160 void verify_istore(u2 index, StackMapFrame* current_frame, TRAPS); | |
| 161 void verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
| 162 void verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
| 163 void verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
| 164 void verify_astore(u2 index, StackMapFrame* current_frame, TRAPS); | |
| 165 void verify_iinc (u2 index, StackMapFrame* current_frame, TRAPS); | |
| 166 | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
167 bool name_in_supers(Symbol* ref_name, instanceKlassHandle current); |
| 0 | 168 |
|
1955
1070423b51f3
6865028: Illegal instructions passing verification prior to 'invokespecial Object.<init>'
kamg
parents:
1602
diff
changeset
|
169 VerificationType object_type() const; |
|
1070423b51f3
6865028: Illegal instructions passing verification prior to 'invokespecial Object.<init>'
kamg
parents:
1602
diff
changeset
|
170 |
| 0 | 171 instanceKlassHandle _klass; // the class being verified |
| 172 methodHandle _method; // current method being verified | |
| 173 VerificationType _this_type; // the verification type of the current class | |
| 174 | |
| 1570 | 175 // Some recursive calls from the verifier to the name resolver |
| 176 // can cause the current class to be re-verified and rewritten. | |
| 177 // If this happens, the original verification should not continue, | |
| 178 // because constant pool indexes will have changed. | |
| 179 // The rewriter is preceded by the verifier. If the verifier throws | |
| 180 // an error, rewriting is prevented. Also, rewriting always precedes | |
| 181 // bytecode execution or compilation. Thus, is_rewritten implies | |
| 182 // that a class has been verified and prepared for execution. | |
| 183 bool was_recursively_verified() { return _klass->is_rewritten(); } | |
| 184 | |
| 0 | 185 public: |
| 186 enum { | |
| 187 BYTECODE_OFFSET = 1, | |
| 188 NEW_OFFSET = 2 | |
| 189 }; | |
| 190 | |
| 191 // constructor | |
| 192 ClassVerifier(instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS); | |
| 193 | |
| 194 // destructor | |
| 195 ~ClassVerifier(); | |
| 196 | |
| 197 Thread* thread() { return _thread; } | |
| 198 methodHandle method() { return _method; } | |
| 199 instanceKlassHandle current_class() const { return _klass; } | |
| 200 VerificationType current_type() const { return _this_type; } | |
| 201 | |
| 202 // Verifies the class. If a verify or class file format error occurs, | |
| 203 // the '_exception_name' symbols will set to the exception name and | |
| 204 // the message_buffer will be filled in with the exception message. | |
| 205 void verify_class(TRAPS); | |
| 206 | |
| 207 // Return status modes | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
208 Symbol* result() const { return _exception_type; } |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
209 bool has_error() const { return result() != NULL; } |
| 0 | 210 |
| 211 // Called when verify or class format errors are encountered. | |
| 212 // May throw an exception based upon the mode. | |
| 213 void verify_error(u2 offset, const char* fmt, ...); | |
| 214 void verify_error(const char* fmt, ...); | |
| 215 void class_format_error(const char* fmt, ...); | |
| 216 void format_error_message(const char* fmt, int offset, va_list args); | |
| 217 | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
218 klassOop load_class(Symbol* name, TRAPS); |
| 0 | 219 |
| 220 int change_sig_to_verificationType( | |
| 221 SignatureStream* sig_type, VerificationType* inference_type, TRAPS); | |
| 222 | |
| 223 VerificationType cp_index_to_type(int index, constantPoolHandle cp, TRAPS) { | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
224 return VerificationType::reference_type(cp->klass_name_at(index)); |
| 0 | 225 } |
| 226 | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
227 // Keep a list of temporary symbols created during verification because |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
228 // their reference counts need to be decrememented when the verifier object |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
229 // goes out of scope. Since these symbols escape the scope in which they're |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
230 // created, we can't use a TempNewSymbol. |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
231 Symbol* create_temporary_symbol(const Symbol* s, int begin, int end, TRAPS); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
232 Symbol* create_temporary_symbol(const char *s, int length, TRAPS); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
233 |
| 0 | 234 static bool _verify_verbose; // for debugging |
| 235 }; | |
| 236 | |
| 237 inline int ClassVerifier::change_sig_to_verificationType( | |
| 238 SignatureStream* sig_type, VerificationType* inference_type, TRAPS) { | |
| 239 BasicType bt = sig_type->type(); | |
| 240 switch (bt) { | |
| 241 case T_OBJECT: | |
| 242 case T_ARRAY: | |
| 243 { | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
244 Symbol* name = sig_type->as_symbol(CHECK_0); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
245 // Create another symbol to save as signature stream unreferences |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
246 // this symbol. |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
247 Symbol* name_copy = |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
248 create_temporary_symbol(name, 0, name->utf8_length(), CHECK_0); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
249 assert(name_copy == name, "symbols don't match"); |
| 0 | 250 *inference_type = |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
251 VerificationType::reference_type(name_copy); |
| 0 | 252 return 1; |
| 253 } | |
| 254 case T_LONG: | |
| 255 *inference_type = VerificationType::long_type(); | |
| 256 *++inference_type = VerificationType::long2_type(); | |
| 257 return 2; | |
| 258 case T_DOUBLE: | |
| 259 *inference_type = VerificationType::double_type(); | |
| 260 *++inference_type = VerificationType::double2_type(); | |
| 261 return 2; | |
| 262 case T_INT: | |
| 263 case T_BOOLEAN: | |
| 264 case T_BYTE: | |
| 265 case T_CHAR: | |
| 266 case T_SHORT: | |
| 267 *inference_type = VerificationType::integer_type(); | |
| 268 return 1; | |
| 269 case T_FLOAT: | |
| 270 *inference_type = VerificationType::float_type(); | |
| 271 return 1; | |
| 272 default: | |
| 273 ShouldNotReachHere(); | |
| 274 return 1; | |
| 275 } | |
| 276 } | |
| 1972 | 277 |
| 278 #endif // SHARE_VM_CLASSFILE_VERIFIER_HPP |