Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/signature.cpp @ 24234:ea6f94ab283b default tip
Added tag jvmci-0.36 for changeset 8128b98d4736
| author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
|---|---|
| date | Mon, 18 Sep 2017 18:49:45 +0200 |
| parents | f13e777eb255 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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 * | |
|
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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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/symbolTable.hpp" | |
| 27 #include "classfile/systemDictionary.hpp" | |
| 28 #include "memory/oopFactory.hpp" | |
| 29 #include "oops/instanceKlass.hpp" | |
| 30 #include "oops/oop.inline.hpp" | |
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31 #include "oops/symbol.hpp" |
| 1972 | 32 #include "oops/typeArrayKlass.hpp" |
| 33 #include "runtime/signature.hpp" | |
| 0 | 34 |
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35 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
| 0 | 36 |
| 37 // Implementation of SignatureIterator | |
| 38 | |
| 39 // Signature syntax: | |
| 40 // | |
| 41 // Signature = "(" {Parameter} ")" ReturnType. | |
| 42 // Parameter = FieldType. | |
| 43 // ReturnType = FieldType | "V". | |
| 44 // FieldType = "B" | "C" | "D" | "F" | "I" | "J" | "S" | "Z" | "L" ClassName ";" | "[" FieldType. | |
| 45 // ClassName = string. | |
| 46 | |
| 47 | |
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48 SignatureIterator::SignatureIterator(Symbol* signature) { |
| 0 | 49 _signature = signature; |
| 50 _parameter_index = 0; | |
| 51 } | |
| 52 | |
| 53 void SignatureIterator::expect(char c) { | |
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54 if (_signature->byte_at(_index) != c) fatal(err_msg("expecting %c", c)); |
| 0 | 55 _index++; |
| 56 } | |
| 57 | |
| 58 | |
| 59 void SignatureIterator::skip_optional_size() { | |
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60 Symbol* sig = _signature; |
| 0 | 61 char c = sig->byte_at(_index); |
| 62 while ('0' <= c && c <= '9') c = sig->byte_at(++_index); | |
| 63 } | |
| 64 | |
| 65 | |
| 66 int SignatureIterator::parse_type() { | |
| 67 // Note: This function could be simplified by using "return T_XXX_size;" | |
| 68 // instead of the assignment and the break statements. However, it | |
| 69 // seems that the product build for win32_i486 with MS VC++ 6.0 doesn't | |
| 70 // work (stack underflow for some tests) - this seems to be a VC++ 6.0 | |
| 71 // compiler bug (was problem - gri 4/27/2000). | |
| 72 int size = -1; | |
| 73 switch(_signature->byte_at(_index)) { | |
| 74 case 'B': do_byte (); if (_parameter_index < 0 ) _return_type = T_BYTE; | |
| 75 _index++; size = T_BYTE_size ; break; | |
| 76 case 'C': do_char (); if (_parameter_index < 0 ) _return_type = T_CHAR; | |
| 77 _index++; size = T_CHAR_size ; break; | |
| 78 case 'D': do_double(); if (_parameter_index < 0 ) _return_type = T_DOUBLE; | |
| 79 _index++; size = T_DOUBLE_size ; break; | |
| 80 case 'F': do_float (); if (_parameter_index < 0 ) _return_type = T_FLOAT; | |
| 81 _index++; size = T_FLOAT_size ; break; | |
| 82 case 'I': do_int (); if (_parameter_index < 0 ) _return_type = T_INT; | |
| 83 _index++; size = T_INT_size ; break; | |
| 84 case 'J': do_long (); if (_parameter_index < 0 ) _return_type = T_LONG; | |
| 85 _index++; size = T_LONG_size ; break; | |
| 86 case 'S': do_short (); if (_parameter_index < 0 ) _return_type = T_SHORT; | |
| 87 _index++; size = T_SHORT_size ; break; | |
| 88 case 'Z': do_bool (); if (_parameter_index < 0 ) _return_type = T_BOOLEAN; | |
| 89 _index++; size = T_BOOLEAN_size; break; | |
| 90 case 'V': do_void (); if (_parameter_index < 0 ) _return_type = T_VOID; | |
| 91 _index++; size = T_VOID_size; ; break; | |
| 92 case 'L': | |
| 93 { int begin = ++_index; | |
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94 Symbol* sig = _signature; |
| 0 | 95 while (sig->byte_at(_index++) != ';') ; |
| 96 do_object(begin, _index); | |
| 97 } | |
| 98 if (_parameter_index < 0 ) _return_type = T_OBJECT; | |
| 99 size = T_OBJECT_size; | |
| 100 break; | |
| 101 case '[': | |
| 102 { int begin = ++_index; | |
| 103 skip_optional_size(); | |
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104 Symbol* sig = _signature; |
| 0 | 105 while (sig->byte_at(_index) == '[') { |
| 106 _index++; | |
| 107 skip_optional_size(); | |
| 108 } | |
| 109 if (sig->byte_at(_index) == 'L') { | |
| 110 while (sig->byte_at(_index++) != ';') ; | |
| 111 } else { | |
| 112 _index++; | |
| 113 } | |
| 114 do_array(begin, _index); | |
| 115 if (_parameter_index < 0 ) _return_type = T_ARRAY; | |
| 116 } | |
| 117 size = T_ARRAY_size; | |
| 118 break; | |
| 119 default: | |
| 120 ShouldNotReachHere(); | |
| 121 break; | |
| 122 } | |
| 123 assert(size >= 0, "size must be set"); | |
| 124 return size; | |
| 125 } | |
| 126 | |
| 127 | |
| 128 void SignatureIterator::check_signature_end() { | |
| 129 if (_index < _signature->utf8_length()) { | |
| 130 tty->print_cr("too many chars in signature"); | |
| 131 _signature->print_value_on(tty); | |
| 132 tty->print_cr(" @ %d", _index); | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 | |
| 137 void SignatureIterator::dispatch_field() { | |
| 138 // no '(', just one (field) type | |
| 139 _index = 0; | |
| 140 _parameter_index = 0; | |
| 141 parse_type(); | |
| 142 check_signature_end(); | |
| 143 } | |
| 144 | |
| 145 | |
| 146 void SignatureIterator::iterate_parameters() { | |
| 147 // Parse parameters | |
| 148 _index = 0; | |
| 149 _parameter_index = 0; | |
| 150 expect('('); | |
| 151 while (_signature->byte_at(_index) != ')') _parameter_index += parse_type(); | |
| 152 expect(')'); | |
| 153 _parameter_index = 0; | |
| 154 } | |
| 155 | |
| 156 // Optimized version of iterat_parameters when fingerprint is known | |
| 157 void SignatureIterator::iterate_parameters( uint64_t fingerprint ) { | |
| 158 uint64_t saved_fingerprint = fingerprint; | |
| 159 | |
| 160 // Check for too many arguments | |
| 161 if ( fingerprint == UCONST64(-1) ) { | |
| 162 SignatureIterator::iterate_parameters(); | |
| 163 return; | |
| 164 } | |
| 165 | |
| 166 assert(fingerprint, "Fingerprint should not be 0"); | |
| 167 | |
| 168 _parameter_index = 0; | |
| 169 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
| 170 while ( 1 ) { | |
| 171 switch ( fingerprint & parameter_feature_mask ) { | |
| 172 case bool_parm: | |
| 173 do_bool(); | |
| 174 _parameter_index += T_BOOLEAN_size; | |
| 175 break; | |
| 176 case byte_parm: | |
| 177 do_byte(); | |
| 178 _parameter_index += T_BYTE_size; | |
| 179 break; | |
| 180 case char_parm: | |
| 181 do_char(); | |
| 182 _parameter_index += T_CHAR_size; | |
| 183 break; | |
| 184 case short_parm: | |
| 185 do_short(); | |
| 186 _parameter_index += T_SHORT_size; | |
| 187 break; | |
| 188 case int_parm: | |
| 189 do_int(); | |
| 190 _parameter_index += T_INT_size; | |
| 191 break; | |
| 192 case obj_parm: | |
| 193 do_object(0, 0); | |
| 194 _parameter_index += T_OBJECT_size; | |
| 195 break; | |
| 196 case long_parm: | |
| 197 do_long(); | |
| 198 _parameter_index += T_LONG_size; | |
| 199 break; | |
| 200 case float_parm: | |
| 201 do_float(); | |
| 202 _parameter_index += T_FLOAT_size; | |
| 203 break; | |
| 204 case double_parm: | |
| 205 do_double(); | |
| 206 _parameter_index += T_DOUBLE_size; | |
| 207 break; | |
| 208 case done_parm: | |
| 209 return; | |
| 210 break; | |
| 211 default: | |
| 212 tty->print_cr("*** parameter is %d", fingerprint & parameter_feature_mask); | |
| 213 tty->print_cr("*** fingerprint is " PTR64_FORMAT, saved_fingerprint); | |
| 214 ShouldNotReachHere(); | |
| 215 break; | |
| 216 } | |
| 217 fingerprint >>= parameter_feature_size; | |
| 218 } | |
| 219 _parameter_index = 0; | |
| 220 } | |
| 221 | |
| 222 | |
| 223 void SignatureIterator::iterate_returntype() { | |
| 224 // Ignore parameters | |
| 225 _index = 0; | |
| 226 expect('('); | |
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227 Symbol* sig = _signature; |
| 23954 | 228 // Need to skip over each type in the signature's argument list until a |
| 229 // closing ')' is found., then get the return type. We cannot just scan | |
| 230 // for the first ')' because ')' is a legal character in a type name. | |
| 231 while (sig->byte_at(_index) != ')') { | |
| 232 switch(sig->byte_at(_index)) { | |
| 233 case 'B': | |
| 234 case 'C': | |
| 235 case 'D': | |
| 236 case 'F': | |
| 237 case 'I': | |
| 238 case 'J': | |
| 239 case 'S': | |
| 240 case 'Z': | |
| 241 case 'V': | |
| 242 { | |
| 243 _index++; | |
| 244 } | |
| 245 break; | |
| 246 case 'L': | |
| 247 { | |
| 248 while (sig->byte_at(_index++) != ';') ; | |
| 249 } | |
| 250 break; | |
| 251 case '[': | |
| 252 { | |
| 253 int begin = ++_index; | |
| 254 skip_optional_size(); | |
| 255 while (sig->byte_at(_index) == '[') { | |
| 256 _index++; | |
| 257 skip_optional_size(); | |
| 258 } | |
| 259 if (sig->byte_at(_index) == 'L') { | |
| 260 while (sig->byte_at(_index++) != ';') ; | |
| 261 } else { | |
| 262 _index++; | |
| 263 } | |
| 264 } | |
| 265 break; | |
| 266 default: | |
| 267 ShouldNotReachHere(); | |
| 268 break; | |
| 269 } | |
| 270 } | |
| 0 | 271 expect(')'); |
| 272 // Parse return type | |
| 273 _parameter_index = -1; | |
| 274 parse_type(); | |
| 275 check_signature_end(); | |
| 276 _parameter_index = 0; | |
| 277 } | |
| 278 | |
| 279 | |
| 280 void SignatureIterator::iterate() { | |
| 281 // Parse parameters | |
| 282 _parameter_index = 0; | |
| 283 _index = 0; | |
| 284 expect('('); | |
| 285 while (_signature->byte_at(_index) != ')') _parameter_index += parse_type(); | |
| 286 expect(')'); | |
| 287 // Parse return type | |
| 288 _parameter_index = -1; | |
| 289 parse_type(); | |
| 290 check_signature_end(); | |
| 291 _parameter_index = 0; | |
| 292 } | |
| 293 | |
| 294 | |
| 295 // Implementation of SignatureStream | |
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296 SignatureStream::SignatureStream(Symbol* signature, bool is_method) : |
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297 _signature(signature), _at_return_type(false) { |
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298 _begin = _end = (is_method ? 1 : 0); // skip first '(' in method signatures |
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299 _names = new GrowableArray<Symbol*>(10); |
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300 next(); |
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301 } |
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302 |
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303 SignatureStream::~SignatureStream() { |
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304 // decrement refcount for names created during signature parsing |
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305 for (int i = 0; i < _names->length(); i++) { |
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306 _names->at(i)->decrement_refcount(); |
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307 } |
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308 } |
| 0 | 309 |
| 310 bool SignatureStream::is_done() const { | |
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311 return _end > _signature->utf8_length(); |
| 0 | 312 } |
| 313 | |
| 314 | |
| 315 void SignatureStream::next_non_primitive(int t) { | |
| 316 switch (t) { | |
| 317 case 'L': { | |
| 318 _type = T_OBJECT; | |
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319 Symbol* sig = _signature; |
| 0 | 320 while (sig->byte_at(_end++) != ';'); |
| 321 break; | |
| 322 } | |
| 323 case '[': { | |
| 324 _type = T_ARRAY; | |
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325 Symbol* sig = _signature; |
| 0 | 326 char c = sig->byte_at(_end); |
| 327 while ('0' <= c && c <= '9') c = sig->byte_at(_end++); | |
| 328 while (sig->byte_at(_end) == '[') { | |
| 329 _end++; | |
| 330 c = sig->byte_at(_end); | |
| 331 while ('0' <= c && c <= '9') c = sig->byte_at(_end++); | |
| 332 } | |
| 333 switch(sig->byte_at(_end)) { | |
| 334 case 'B': | |
| 335 case 'C': | |
| 336 case 'D': | |
| 337 case 'F': | |
| 338 case 'I': | |
| 339 case 'J': | |
| 340 case 'S': | |
| 341 case 'Z':_end++; break; | |
| 342 default: { | |
| 343 while (sig->byte_at(_end++) != ';'); | |
| 344 break; | |
| 345 } | |
| 346 } | |
| 347 break; | |
| 348 } | |
| 349 case ')': _end++; next(); _at_return_type = true; break; | |
| 350 default : ShouldNotReachHere(); | |
| 351 } | |
| 352 } | |
| 353 | |
| 354 | |
| 355 bool SignatureStream::is_object() const { | |
| 356 return _type == T_OBJECT | |
| 357 || _type == T_ARRAY; | |
| 358 } | |
| 359 | |
| 360 bool SignatureStream::is_array() const { | |
| 361 return _type == T_ARRAY; | |
| 362 } | |
| 363 | |
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364 Symbol* SignatureStream::as_symbol(TRAPS) { |
| 0 | 365 // Create a symbol from for string _begin _end |
| 366 int begin = _begin; | |
| 367 int end = _end; | |
| 368 | |
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369 if ( _signature->byte_at(_begin) == 'L' |
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370 && _signature->byte_at(_end-1) == ';') { |
| 0 | 371 begin++; |
| 372 end--; | |
| 373 } | |
| 374 | |
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375 // Save names for cleaning up reference count at the end of |
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376 // SignatureStream scope. |
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377 Symbol* name = SymbolTable::new_symbol(_signature, begin, end, CHECK_NULL); |
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378 _names->push(name); // save new symbol for decrementing later |
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379 return name; |
| 0 | 380 } |
| 381 | |
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382 Klass* SignatureStream::as_klass(Handle class_loader, Handle protection_domain, |
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383 FailureMode failure_mode, TRAPS) { |
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384 if (!is_object()) return NULL; |
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385 Symbol* name = as_symbol(CHECK_NULL); |
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386 if (failure_mode == ReturnNull) { |
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387 return SystemDictionary::resolve_or_null(name, class_loader, protection_domain, THREAD); |
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388 } else { |
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389 bool throw_error = (failure_mode == NCDFError); |
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390 return SystemDictionary::resolve_or_fail(name, class_loader, protection_domain, throw_error, THREAD); |
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391 } |
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392 } |
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393 |
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394 oop SignatureStream::as_java_mirror(Handle class_loader, Handle protection_domain, |
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395 FailureMode failure_mode, TRAPS) { |
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396 if (!is_object()) |
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397 return Universe::java_mirror(type()); |
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398 Klass* klass = as_klass(class_loader, protection_domain, failure_mode, CHECK_NULL); |
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399 if (klass == NULL) return NULL; |
| 6983 | 400 return klass->java_mirror(); |
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401 } |
| 0 | 402 |
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403 Symbol* SignatureStream::as_symbol_or_null() { |
| 0 | 404 // Create a symbol from for string _begin _end |
| 405 ResourceMark rm; | |
| 406 | |
| 407 int begin = _begin; | |
| 408 int end = _end; | |
| 409 | |
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410 if ( _signature->byte_at(_begin) == 'L' |
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411 && _signature->byte_at(_end-1) == ';') { |
| 0 | 412 begin++; |
| 413 end--; | |
| 414 } | |
| 415 | |
| 416 char* buffer = NEW_RESOURCE_ARRAY(char, end - begin); | |
| 417 for (int index = begin; index < end; index++) { | |
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418 buffer[index - begin] = _signature->byte_at(index); |
| 0 | 419 } |
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420 Symbol* result = SymbolTable::probe(buffer, end - begin); |
| 0 | 421 return result; |
| 422 } | |
| 423 | |
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424 int SignatureStream::reference_parameter_count() { |
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425 int args_count = 0; |
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426 for ( ; !at_return_type(); next()) { |
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427 if (is_object()) { |
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428 args_count++; |
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429 } |
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430 } |
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431 return args_count; |
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432 } |
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433 |
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434 bool SignatureVerifier::is_valid_signature(Symbol* sig) { |
| 0 | 435 const char* signature = (const char*)sig->bytes(); |
| 436 ssize_t len = sig->utf8_length(); | |
| 437 if (signature == NULL || signature[0] == '\0' || len < 1) { | |
| 438 return false; | |
| 439 } else if (signature[0] == '(') { | |
| 440 return is_valid_method_signature(sig); | |
| 441 } else { | |
| 442 return is_valid_type_signature(sig); | |
| 443 } | |
| 444 } | |
| 445 | |
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446 bool SignatureVerifier::is_valid_method_signature(Symbol* sig) { |
| 0 | 447 const char* method_sig = (const char*)sig->bytes(); |
| 448 ssize_t len = sig->utf8_length(); | |
| 449 ssize_t index = 0; | |
| 450 if (method_sig != NULL && len > 1 && method_sig[index] == '(') { | |
| 451 ++index; | |
| 452 while (index < len && method_sig[index] != ')') { | |
| 453 ssize_t res = is_valid_type(&method_sig[index], len - index); | |
| 454 if (res == -1) { | |
| 455 return false; | |
| 456 } else { | |
| 457 index += res; | |
| 458 } | |
| 459 } | |
| 460 if (index < len && method_sig[index] == ')') { | |
| 461 // check the return type | |
| 462 ++index; | |
| 463 return (is_valid_type(&method_sig[index], len - index) == (len - index)); | |
| 464 } | |
| 465 } | |
| 466 return false; | |
| 467 } | |
| 468 | |
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469 bool SignatureVerifier::is_valid_type_signature(Symbol* sig) { |
| 0 | 470 const char* type_sig = (const char*)sig->bytes(); |
| 471 ssize_t len = sig->utf8_length(); | |
| 472 return (type_sig != NULL && len >= 1 && | |
| 473 (is_valid_type(type_sig, len) == len)); | |
| 474 } | |
| 475 | |
| 476 // Checks to see if the type (not to go beyond 'limit') refers to a valid type. | |
| 477 // Returns -1 if it is not, or the index of the next character that is not part | |
| 478 // of the type. The type encoding may end before 'limit' and that's ok. | |
| 479 ssize_t SignatureVerifier::is_valid_type(const char* type, ssize_t limit) { | |
| 480 ssize_t index = 0; | |
| 481 | |
| 482 // Iterate over any number of array dimensions | |
| 483 while (index < limit && type[index] == '[') ++index; | |
| 484 if (index >= limit) { | |
| 485 return -1; | |
| 486 } | |
| 487 switch (type[index]) { | |
| 488 case 'B': case 'C': case 'D': case 'F': case 'I': | |
| 489 case 'J': case 'S': case 'Z': case 'V': | |
| 490 return index + 1; | |
| 491 case 'L': | |
| 492 for (index = index + 1; index < limit; ++index) { | |
| 493 char c = type[index]; | |
| 494 if (c == ';') { | |
| 495 return index + 1; | |
| 496 } | |
| 497 if (invalid_name_char(c)) { | |
| 498 return -1; | |
| 499 } | |
| 500 } | |
| 501 // fall through | |
| 502 default: ; // fall through | |
| 503 } | |
| 504 return -1; | |
| 505 } | |
| 506 | |
| 507 bool SignatureVerifier::invalid_name_char(char c) { | |
| 508 switch (c) { | |
| 509 case '\0': case '.': case ';': case '[': | |
| 510 return true; | |
| 511 default: | |
| 512 return false; | |
| 513 } | |
| 514 } |