Mercurial > hg > truffle
annotate src/share/vm/runtime/signature.cpp @ 2129:8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
Reviewed-by: mchung, acorn
| author | kevinw |
|---|---|
| date | Wed, 12 Jan 2011 15:44:16 +0000 |
| parents | f95d63e2154a |
| children | 3582bf76420e |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 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 * | |
|
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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" | |
| 31 #include "oops/symbolOop.hpp" | |
| 32 #include "oops/typeArrayKlass.hpp" | |
| 33 #include "runtime/signature.hpp" | |
| 0 | 34 |
| 35 | |
| 36 // Implementation of SignatureIterator | |
| 37 | |
| 38 // Signature syntax: | |
| 39 // | |
| 40 // Signature = "(" {Parameter} ")" ReturnType. | |
| 41 // Parameter = FieldType. | |
| 42 // ReturnType = FieldType | "V". | |
| 43 // FieldType = "B" | "C" | "D" | "F" | "I" | "J" | "S" | "Z" | "L" ClassName ";" | "[" FieldType. | |
| 44 // ClassName = string. | |
| 45 | |
| 46 | |
| 47 SignatureIterator::SignatureIterator(symbolHandle signature) { | |
| 48 assert(signature->is_symbol(), "not a symbol"); | |
| 49 _signature = signature; | |
| 50 _parameter_index = 0; | |
| 51 } | |
| 52 | |
| 53 // Overloaded version called without handle | |
| 54 SignatureIterator::SignatureIterator(symbolOop signature) { | |
| 55 symbolHandle sh(Thread::current(), signature); | |
| 56 _signature = sh; | |
| 57 _parameter_index = 0; | |
| 58 } | |
| 59 | |
| 60 SignatureIterator::SignatureIterator(Thread *thread, symbolOop signature) { | |
| 61 symbolHandle sh(thread, signature); | |
| 62 _signature = sh; | |
| 63 _parameter_index = 0; | |
| 64 } | |
| 65 | |
| 66 void SignatureIterator::expect(char c) { | |
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67 if (_signature->byte_at(_index) != c) fatal(err_msg("expecting %c", c)); |
| 0 | 68 _index++; |
| 69 } | |
| 70 | |
| 71 | |
| 72 void SignatureIterator::skip_optional_size() { | |
| 73 symbolOop sig = _signature(); | |
| 74 char c = sig->byte_at(_index); | |
| 75 while ('0' <= c && c <= '9') c = sig->byte_at(++_index); | |
| 76 } | |
| 77 | |
| 78 | |
| 79 int SignatureIterator::parse_type() { | |
| 80 // Note: This function could be simplified by using "return T_XXX_size;" | |
| 81 // instead of the assignment and the break statements. However, it | |
| 82 // seems that the product build for win32_i486 with MS VC++ 6.0 doesn't | |
| 83 // work (stack underflow for some tests) - this seems to be a VC++ 6.0 | |
| 84 // compiler bug (was problem - gri 4/27/2000). | |
| 85 int size = -1; | |
| 86 switch(_signature->byte_at(_index)) { | |
| 87 case 'B': do_byte (); if (_parameter_index < 0 ) _return_type = T_BYTE; | |
| 88 _index++; size = T_BYTE_size ; break; | |
| 89 case 'C': do_char (); if (_parameter_index < 0 ) _return_type = T_CHAR; | |
| 90 _index++; size = T_CHAR_size ; break; | |
| 91 case 'D': do_double(); if (_parameter_index < 0 ) _return_type = T_DOUBLE; | |
| 92 _index++; size = T_DOUBLE_size ; break; | |
| 93 case 'F': do_float (); if (_parameter_index < 0 ) _return_type = T_FLOAT; | |
| 94 _index++; size = T_FLOAT_size ; break; | |
| 95 case 'I': do_int (); if (_parameter_index < 0 ) _return_type = T_INT; | |
| 96 _index++; size = T_INT_size ; break; | |
| 97 case 'J': do_long (); if (_parameter_index < 0 ) _return_type = T_LONG; | |
| 98 _index++; size = T_LONG_size ; break; | |
| 99 case 'S': do_short (); if (_parameter_index < 0 ) _return_type = T_SHORT; | |
| 100 _index++; size = T_SHORT_size ; break; | |
| 101 case 'Z': do_bool (); if (_parameter_index < 0 ) _return_type = T_BOOLEAN; | |
| 102 _index++; size = T_BOOLEAN_size; break; | |
| 103 case 'V': do_void (); if (_parameter_index < 0 ) _return_type = T_VOID; | |
| 104 _index++; size = T_VOID_size; ; break; | |
| 105 case 'L': | |
| 106 { int begin = ++_index; | |
| 107 symbolOop sig = _signature(); | |
| 108 while (sig->byte_at(_index++) != ';') ; | |
| 109 do_object(begin, _index); | |
| 110 } | |
| 111 if (_parameter_index < 0 ) _return_type = T_OBJECT; | |
| 112 size = T_OBJECT_size; | |
| 113 break; | |
| 114 case '[': | |
| 115 { int begin = ++_index; | |
| 116 skip_optional_size(); | |
| 117 symbolOop sig = _signature(); | |
| 118 while (sig->byte_at(_index) == '[') { | |
| 119 _index++; | |
| 120 skip_optional_size(); | |
| 121 } | |
| 122 if (sig->byte_at(_index) == 'L') { | |
| 123 while (sig->byte_at(_index++) != ';') ; | |
| 124 } else { | |
| 125 _index++; | |
| 126 } | |
| 127 do_array(begin, _index); | |
| 128 if (_parameter_index < 0 ) _return_type = T_ARRAY; | |
| 129 } | |
| 130 size = T_ARRAY_size; | |
| 131 break; | |
| 132 default: | |
| 133 ShouldNotReachHere(); | |
| 134 break; | |
| 135 } | |
| 136 assert(size >= 0, "size must be set"); | |
| 137 return size; | |
| 138 } | |
| 139 | |
| 140 | |
| 141 void SignatureIterator::check_signature_end() { | |
| 142 if (_index < _signature->utf8_length()) { | |
| 143 tty->print_cr("too many chars in signature"); | |
| 144 _signature->print_value_on(tty); | |
| 145 tty->print_cr(" @ %d", _index); | |
| 146 } | |
| 147 } | |
| 148 | |
| 149 | |
| 150 void SignatureIterator::dispatch_field() { | |
| 151 // no '(', just one (field) type | |
| 152 _index = 0; | |
| 153 _parameter_index = 0; | |
| 154 parse_type(); | |
| 155 check_signature_end(); | |
| 156 } | |
| 157 | |
| 158 | |
| 159 void SignatureIterator::iterate_parameters() { | |
| 160 // Parse parameters | |
| 161 _index = 0; | |
| 162 _parameter_index = 0; | |
| 163 expect('('); | |
| 164 while (_signature->byte_at(_index) != ')') _parameter_index += parse_type(); | |
| 165 expect(')'); | |
| 166 _parameter_index = 0; | |
| 167 } | |
| 168 | |
| 169 // Optimized version of iterat_parameters when fingerprint is known | |
| 170 void SignatureIterator::iterate_parameters( uint64_t fingerprint ) { | |
| 171 uint64_t saved_fingerprint = fingerprint; | |
| 172 | |
| 173 // Check for too many arguments | |
| 174 if ( fingerprint == UCONST64(-1) ) { | |
| 175 SignatureIterator::iterate_parameters(); | |
| 176 return; | |
| 177 } | |
| 178 | |
| 179 assert(fingerprint, "Fingerprint should not be 0"); | |
| 180 | |
| 181 _parameter_index = 0; | |
| 182 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
| 183 while ( 1 ) { | |
| 184 switch ( fingerprint & parameter_feature_mask ) { | |
| 185 case bool_parm: | |
| 186 do_bool(); | |
| 187 _parameter_index += T_BOOLEAN_size; | |
| 188 break; | |
| 189 case byte_parm: | |
| 190 do_byte(); | |
| 191 _parameter_index += T_BYTE_size; | |
| 192 break; | |
| 193 case char_parm: | |
| 194 do_char(); | |
| 195 _parameter_index += T_CHAR_size; | |
| 196 break; | |
| 197 case short_parm: | |
| 198 do_short(); | |
| 199 _parameter_index += T_SHORT_size; | |
| 200 break; | |
| 201 case int_parm: | |
| 202 do_int(); | |
| 203 _parameter_index += T_INT_size; | |
| 204 break; | |
| 205 case obj_parm: | |
| 206 do_object(0, 0); | |
| 207 _parameter_index += T_OBJECT_size; | |
| 208 break; | |
| 209 case long_parm: | |
| 210 do_long(); | |
| 211 _parameter_index += T_LONG_size; | |
| 212 break; | |
| 213 case float_parm: | |
| 214 do_float(); | |
| 215 _parameter_index += T_FLOAT_size; | |
| 216 break; | |
| 217 case double_parm: | |
| 218 do_double(); | |
| 219 _parameter_index += T_DOUBLE_size; | |
| 220 break; | |
| 221 case done_parm: | |
| 222 return; | |
| 223 break; | |
| 224 default: | |
| 225 tty->print_cr("*** parameter is %d", fingerprint & parameter_feature_mask); | |
| 226 tty->print_cr("*** fingerprint is " PTR64_FORMAT, saved_fingerprint); | |
| 227 ShouldNotReachHere(); | |
| 228 break; | |
| 229 } | |
| 230 fingerprint >>= parameter_feature_size; | |
| 231 } | |
| 232 _parameter_index = 0; | |
| 233 } | |
| 234 | |
| 235 | |
| 236 void SignatureIterator::iterate_returntype() { | |
| 237 // Ignore parameters | |
| 238 _index = 0; | |
| 239 expect('('); | |
| 240 symbolOop sig = _signature(); | |
| 241 while (sig->byte_at(_index) != ')') _index++; | |
| 242 expect(')'); | |
| 243 // Parse return type | |
| 244 _parameter_index = -1; | |
| 245 parse_type(); | |
| 246 check_signature_end(); | |
| 247 _parameter_index = 0; | |
| 248 } | |
| 249 | |
| 250 | |
| 251 void SignatureIterator::iterate() { | |
| 252 // Parse parameters | |
| 253 _parameter_index = 0; | |
| 254 _index = 0; | |
| 255 expect('('); | |
| 256 while (_signature->byte_at(_index) != ')') _parameter_index += parse_type(); | |
| 257 expect(')'); | |
| 258 // Parse return type | |
| 259 _parameter_index = -1; | |
| 260 parse_type(); | |
| 261 check_signature_end(); | |
| 262 _parameter_index = 0; | |
| 263 } | |
| 264 | |
| 265 | |
| 266 // Implementation of SignatureStream | |
| 267 | |
| 268 bool SignatureStream::is_done() const { | |
| 269 return _end > _signature()->utf8_length(); | |
| 270 } | |
| 271 | |
| 272 | |
| 273 void SignatureStream::next_non_primitive(int t) { | |
| 274 switch (t) { | |
| 275 case 'L': { | |
| 276 _type = T_OBJECT; | |
| 277 symbolOop sig = _signature(); | |
| 278 while (sig->byte_at(_end++) != ';'); | |
| 279 break; | |
| 280 } | |
| 281 case '[': { | |
| 282 _type = T_ARRAY; | |
| 283 symbolOop sig = _signature(); | |
| 284 char c = sig->byte_at(_end); | |
| 285 while ('0' <= c && c <= '9') c = sig->byte_at(_end++); | |
| 286 while (sig->byte_at(_end) == '[') { | |
| 287 _end++; | |
| 288 c = sig->byte_at(_end); | |
| 289 while ('0' <= c && c <= '9') c = sig->byte_at(_end++); | |
| 290 } | |
| 291 switch(sig->byte_at(_end)) { | |
| 292 case 'B': | |
| 293 case 'C': | |
| 294 case 'D': | |
| 295 case 'F': | |
| 296 case 'I': | |
| 297 case 'J': | |
| 298 case 'S': | |
| 299 case 'Z':_end++; break; | |
| 300 default: { | |
| 301 while (sig->byte_at(_end++) != ';'); | |
| 302 break; | |
| 303 } | |
| 304 } | |
| 305 break; | |
| 306 } | |
| 307 case ')': _end++; next(); _at_return_type = true; break; | |
| 308 default : ShouldNotReachHere(); | |
| 309 } | |
| 310 } | |
| 311 | |
| 312 | |
| 313 bool SignatureStream::is_object() const { | |
| 314 return _type == T_OBJECT | |
| 315 || _type == T_ARRAY; | |
| 316 } | |
| 317 | |
| 318 bool SignatureStream::is_array() const { | |
| 319 return _type == T_ARRAY; | |
| 320 } | |
| 321 | |
| 322 symbolOop SignatureStream::as_symbol(TRAPS) { | |
| 323 // Create a symbol from for string _begin _end | |
| 324 int begin = _begin; | |
| 325 int end = _end; | |
| 326 | |
| 327 if ( _signature()->byte_at(_begin) == 'L' | |
| 328 && _signature()->byte_at(_end-1) == ';') { | |
| 329 begin++; | |
| 330 end--; | |
| 331 } | |
| 332 | |
| 333 symbolOop result = oopFactory::new_symbol(_signature, begin, end, CHECK_NULL); | |
| 334 return result; | |
| 335 } | |
| 336 | |
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337 klassOop SignatureStream::as_klass(Handle class_loader, Handle protection_domain, |
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338 FailureMode failure_mode, TRAPS) { |
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339 if (!is_object()) return NULL; |
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340 symbolOop name = as_symbol(CHECK_NULL); |
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341 if (failure_mode == ReturnNull) { |
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342 return SystemDictionary::resolve_or_null(name, class_loader, protection_domain, THREAD); |
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343 } else { |
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344 bool throw_error = (failure_mode == NCDFError); |
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345 return SystemDictionary::resolve_or_fail(name, class_loader, protection_domain, throw_error, THREAD); |
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346 } |
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347 } |
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348 |
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349 oop SignatureStream::as_java_mirror(Handle class_loader, Handle protection_domain, |
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350 FailureMode failure_mode, TRAPS) { |
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351 if (!is_object()) |
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352 return Universe::java_mirror(type()); |
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353 klassOop klass = as_klass(class_loader, protection_domain, failure_mode, CHECK_NULL); |
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354 if (klass == NULL) return NULL; |
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355 return Klass::cast(klass)->java_mirror(); |
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356 } |
| 0 | 357 |
| 358 symbolOop SignatureStream::as_symbol_or_null() { | |
| 359 // Create a symbol from for string _begin _end | |
| 360 ResourceMark rm; | |
| 361 | |
| 362 int begin = _begin; | |
| 363 int end = _end; | |
| 364 | |
| 365 if ( _signature()->byte_at(_begin) == 'L' | |
| 366 && _signature()->byte_at(_end-1) == ';') { | |
| 367 begin++; | |
| 368 end--; | |
| 369 } | |
| 370 | |
| 371 char* buffer = NEW_RESOURCE_ARRAY(char, end - begin); | |
| 372 for (int index = begin; index < end; index++) { | |
| 373 buffer[index - begin] = _signature()->byte_at(index); | |
| 374 } | |
| 375 symbolOop result = SymbolTable::probe(buffer, end - begin); | |
| 376 return result; | |
| 377 } | |
| 378 | |
| 379 bool SignatureVerifier::is_valid_signature(symbolHandle sig) { | |
| 380 const char* signature = (const char*)sig->bytes(); | |
| 381 ssize_t len = sig->utf8_length(); | |
| 382 if (signature == NULL || signature[0] == '\0' || len < 1) { | |
| 383 return false; | |
| 384 } else if (signature[0] == '(') { | |
| 385 return is_valid_method_signature(sig); | |
| 386 } else { | |
| 387 return is_valid_type_signature(sig); | |
| 388 } | |
| 389 } | |
| 390 | |
| 391 bool SignatureVerifier::is_valid_method_signature(symbolHandle sig) { | |
| 392 const char* method_sig = (const char*)sig->bytes(); | |
| 393 ssize_t len = sig->utf8_length(); | |
| 394 ssize_t index = 0; | |
| 395 if (method_sig != NULL && len > 1 && method_sig[index] == '(') { | |
| 396 ++index; | |
| 397 while (index < len && method_sig[index] != ')') { | |
| 398 ssize_t res = is_valid_type(&method_sig[index], len - index); | |
| 399 if (res == -1) { | |
| 400 return false; | |
| 401 } else { | |
| 402 index += res; | |
| 403 } | |
| 404 } | |
| 405 if (index < len && method_sig[index] == ')') { | |
| 406 // check the return type | |
| 407 ++index; | |
| 408 return (is_valid_type(&method_sig[index], len - index) == (len - index)); | |
| 409 } | |
| 410 } | |
| 411 return false; | |
| 412 } | |
| 413 | |
| 414 bool SignatureVerifier::is_valid_type_signature(symbolHandle sig) { | |
| 415 const char* type_sig = (const char*)sig->bytes(); | |
| 416 ssize_t len = sig->utf8_length(); | |
| 417 return (type_sig != NULL && len >= 1 && | |
| 418 (is_valid_type(type_sig, len) == len)); | |
| 419 } | |
| 420 | |
| 421 // Checks to see if the type (not to go beyond 'limit') refers to a valid type. | |
| 422 // Returns -1 if it is not, or the index of the next character that is not part | |
| 423 // of the type. The type encoding may end before 'limit' and that's ok. | |
| 424 ssize_t SignatureVerifier::is_valid_type(const char* type, ssize_t limit) { | |
| 425 ssize_t index = 0; | |
| 426 | |
| 427 // Iterate over any number of array dimensions | |
| 428 while (index < limit && type[index] == '[') ++index; | |
| 429 if (index >= limit) { | |
| 430 return -1; | |
| 431 } | |
| 432 switch (type[index]) { | |
| 433 case 'B': case 'C': case 'D': case 'F': case 'I': | |
| 434 case 'J': case 'S': case 'Z': case 'V': | |
| 435 return index + 1; | |
| 436 case 'L': | |
| 437 for (index = index + 1; index < limit; ++index) { | |
| 438 char c = type[index]; | |
| 439 if (c == ';') { | |
| 440 return index + 1; | |
| 441 } | |
| 442 if (invalid_name_char(c)) { | |
| 443 return -1; | |
| 444 } | |
| 445 } | |
| 446 // fall through | |
| 447 default: ; // fall through | |
| 448 } | |
| 449 return -1; | |
| 450 } | |
| 451 | |
| 452 bool SignatureVerifier::invalid_name_char(char c) { | |
| 453 switch (c) { | |
| 454 case '\0': case '.': case ';': case '[': | |
| 455 return true; | |
| 456 default: | |
| 457 return false; | |
| 458 } | |
| 459 } |