Mercurial > hg > truffle
annotate src/share/vm/runtime/signature.cpp @ 1490:f03d0a26bf83
6888954: argument formatting for assert() and friends
Reviewed-by: kvn, twisti, apetrusenko, never, dcubed
| author | jcoomes |
|---|---|
| date | Thu, 22 Apr 2010 13:23:15 -0700 |
| parents | a61af66fc99e |
| children | df736661d0c8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. | |
| 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_signature.cpp.incl" | |
| 27 | |
| 28 | |
| 29 // Implementation of SignatureIterator | |
| 30 | |
| 31 // Signature syntax: | |
| 32 // | |
| 33 // Signature = "(" {Parameter} ")" ReturnType. | |
| 34 // Parameter = FieldType. | |
| 35 // ReturnType = FieldType | "V". | |
| 36 // FieldType = "B" | "C" | "D" | "F" | "I" | "J" | "S" | "Z" | "L" ClassName ";" | "[" FieldType. | |
| 37 // ClassName = string. | |
| 38 | |
| 39 | |
| 40 SignatureIterator::SignatureIterator(symbolHandle signature) { | |
| 41 assert(signature->is_symbol(), "not a symbol"); | |
| 42 _signature = signature; | |
| 43 _parameter_index = 0; | |
| 44 } | |
| 45 | |
| 46 // Overloaded version called without handle | |
| 47 SignatureIterator::SignatureIterator(symbolOop signature) { | |
| 48 symbolHandle sh(Thread::current(), signature); | |
| 49 _signature = sh; | |
| 50 _parameter_index = 0; | |
| 51 } | |
| 52 | |
| 53 SignatureIterator::SignatureIterator(Thread *thread, symbolOop signature) { | |
| 54 symbolHandle sh(thread, signature); | |
| 55 _signature = sh; | |
| 56 _parameter_index = 0; | |
| 57 } | |
| 58 | |
| 59 void SignatureIterator::expect(char c) { | |
|
1490
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
0
diff
changeset
|
60 if (_signature->byte_at(_index) != c) fatal(err_msg("expecting %c", c)); |
| 0 | 61 _index++; |
| 62 } | |
| 63 | |
| 64 | |
| 65 void SignatureIterator::skip_optional_size() { | |
| 66 symbolOop sig = _signature(); | |
| 67 char c = sig->byte_at(_index); | |
| 68 while ('0' <= c && c <= '9') c = sig->byte_at(++_index); | |
| 69 } | |
| 70 | |
| 71 | |
| 72 int SignatureIterator::parse_type() { | |
| 73 // Note: This function could be simplified by using "return T_XXX_size;" | |
| 74 // instead of the assignment and the break statements. However, it | |
| 75 // seems that the product build for win32_i486 with MS VC++ 6.0 doesn't | |
| 76 // work (stack underflow for some tests) - this seems to be a VC++ 6.0 | |
| 77 // compiler bug (was problem - gri 4/27/2000). | |
| 78 int size = -1; | |
| 79 switch(_signature->byte_at(_index)) { | |
| 80 case 'B': do_byte (); if (_parameter_index < 0 ) _return_type = T_BYTE; | |
| 81 _index++; size = T_BYTE_size ; break; | |
| 82 case 'C': do_char (); if (_parameter_index < 0 ) _return_type = T_CHAR; | |
| 83 _index++; size = T_CHAR_size ; break; | |
| 84 case 'D': do_double(); if (_parameter_index < 0 ) _return_type = T_DOUBLE; | |
| 85 _index++; size = T_DOUBLE_size ; break; | |
| 86 case 'F': do_float (); if (_parameter_index < 0 ) _return_type = T_FLOAT; | |
| 87 _index++; size = T_FLOAT_size ; break; | |
| 88 case 'I': do_int (); if (_parameter_index < 0 ) _return_type = T_INT; | |
| 89 _index++; size = T_INT_size ; break; | |
| 90 case 'J': do_long (); if (_parameter_index < 0 ) _return_type = T_LONG; | |
| 91 _index++; size = T_LONG_size ; break; | |
| 92 case 'S': do_short (); if (_parameter_index < 0 ) _return_type = T_SHORT; | |
| 93 _index++; size = T_SHORT_size ; break; | |
| 94 case 'Z': do_bool (); if (_parameter_index < 0 ) _return_type = T_BOOLEAN; | |
| 95 _index++; size = T_BOOLEAN_size; break; | |
| 96 case 'V': do_void (); if (_parameter_index < 0 ) _return_type = T_VOID; | |
| 97 _index++; size = T_VOID_size; ; break; | |
| 98 case 'L': | |
| 99 { int begin = ++_index; | |
| 100 symbolOop sig = _signature(); | |
| 101 while (sig->byte_at(_index++) != ';') ; | |
| 102 do_object(begin, _index); | |
| 103 } | |
| 104 if (_parameter_index < 0 ) _return_type = T_OBJECT; | |
| 105 size = T_OBJECT_size; | |
| 106 break; | |
| 107 case '[': | |
| 108 { int begin = ++_index; | |
| 109 skip_optional_size(); | |
| 110 symbolOop sig = _signature(); | |
| 111 while (sig->byte_at(_index) == '[') { | |
| 112 _index++; | |
| 113 skip_optional_size(); | |
| 114 } | |
| 115 if (sig->byte_at(_index) == 'L') { | |
| 116 while (sig->byte_at(_index++) != ';') ; | |
| 117 } else { | |
| 118 _index++; | |
| 119 } | |
| 120 do_array(begin, _index); | |
| 121 if (_parameter_index < 0 ) _return_type = T_ARRAY; | |
| 122 } | |
| 123 size = T_ARRAY_size; | |
| 124 break; | |
| 125 default: | |
| 126 ShouldNotReachHere(); | |
| 127 break; | |
| 128 } | |
| 129 assert(size >= 0, "size must be set"); | |
| 130 return size; | |
| 131 } | |
| 132 | |
| 133 | |
| 134 void SignatureIterator::check_signature_end() { | |
| 135 if (_index < _signature->utf8_length()) { | |
| 136 tty->print_cr("too many chars in signature"); | |
| 137 _signature->print_value_on(tty); | |
| 138 tty->print_cr(" @ %d", _index); | |
| 139 } | |
| 140 } | |
| 141 | |
| 142 | |
| 143 void SignatureIterator::dispatch_field() { | |
| 144 // no '(', just one (field) type | |
| 145 _index = 0; | |
| 146 _parameter_index = 0; | |
| 147 parse_type(); | |
| 148 check_signature_end(); | |
| 149 } | |
| 150 | |
| 151 | |
| 152 void SignatureIterator::iterate_parameters() { | |
| 153 // Parse parameters | |
| 154 _index = 0; | |
| 155 _parameter_index = 0; | |
| 156 expect('('); | |
| 157 while (_signature->byte_at(_index) != ')') _parameter_index += parse_type(); | |
| 158 expect(')'); | |
| 159 _parameter_index = 0; | |
| 160 } | |
| 161 | |
| 162 // Optimized version of iterat_parameters when fingerprint is known | |
| 163 void SignatureIterator::iterate_parameters( uint64_t fingerprint ) { | |
| 164 uint64_t saved_fingerprint = fingerprint; | |
| 165 | |
| 166 // Check for too many arguments | |
| 167 if ( fingerprint == UCONST64(-1) ) { | |
| 168 SignatureIterator::iterate_parameters(); | |
| 169 return; | |
| 170 } | |
| 171 | |
| 172 assert(fingerprint, "Fingerprint should not be 0"); | |
| 173 | |
| 174 _parameter_index = 0; | |
| 175 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
| 176 while ( 1 ) { | |
| 177 switch ( fingerprint & parameter_feature_mask ) { | |
| 178 case bool_parm: | |
| 179 do_bool(); | |
| 180 _parameter_index += T_BOOLEAN_size; | |
| 181 break; | |
| 182 case byte_parm: | |
| 183 do_byte(); | |
| 184 _parameter_index += T_BYTE_size; | |
| 185 break; | |
| 186 case char_parm: | |
| 187 do_char(); | |
| 188 _parameter_index += T_CHAR_size; | |
| 189 break; | |
| 190 case short_parm: | |
| 191 do_short(); | |
| 192 _parameter_index += T_SHORT_size; | |
| 193 break; | |
| 194 case int_parm: | |
| 195 do_int(); | |
| 196 _parameter_index += T_INT_size; | |
| 197 break; | |
| 198 case obj_parm: | |
| 199 do_object(0, 0); | |
| 200 _parameter_index += T_OBJECT_size; | |
| 201 break; | |
| 202 case long_parm: | |
| 203 do_long(); | |
| 204 _parameter_index += T_LONG_size; | |
| 205 break; | |
| 206 case float_parm: | |
| 207 do_float(); | |
| 208 _parameter_index += T_FLOAT_size; | |
| 209 break; | |
| 210 case double_parm: | |
| 211 do_double(); | |
| 212 _parameter_index += T_DOUBLE_size; | |
| 213 break; | |
| 214 case done_parm: | |
| 215 return; | |
| 216 break; | |
| 217 default: | |
| 218 tty->print_cr("*** parameter is %d", fingerprint & parameter_feature_mask); | |
| 219 tty->print_cr("*** fingerprint is " PTR64_FORMAT, saved_fingerprint); | |
| 220 ShouldNotReachHere(); | |
| 221 break; | |
| 222 } | |
| 223 fingerprint >>= parameter_feature_size; | |
| 224 } | |
| 225 _parameter_index = 0; | |
| 226 } | |
| 227 | |
| 228 | |
| 229 void SignatureIterator::iterate_returntype() { | |
| 230 // Ignore parameters | |
| 231 _index = 0; | |
| 232 expect('('); | |
| 233 symbolOop sig = _signature(); | |
| 234 while (sig->byte_at(_index) != ')') _index++; | |
| 235 expect(')'); | |
| 236 // Parse return type | |
| 237 _parameter_index = -1; | |
| 238 parse_type(); | |
| 239 check_signature_end(); | |
| 240 _parameter_index = 0; | |
| 241 } | |
| 242 | |
| 243 | |
| 244 void SignatureIterator::iterate() { | |
| 245 // Parse parameters | |
| 246 _parameter_index = 0; | |
| 247 _index = 0; | |
| 248 expect('('); | |
| 249 while (_signature->byte_at(_index) != ')') _parameter_index += parse_type(); | |
| 250 expect(')'); | |
| 251 // Parse return type | |
| 252 _parameter_index = -1; | |
| 253 parse_type(); | |
| 254 check_signature_end(); | |
| 255 _parameter_index = 0; | |
| 256 } | |
| 257 | |
| 258 | |
| 259 // Implementation of SignatureStream | |
| 260 | |
| 261 bool SignatureStream::is_done() const { | |
| 262 return _end > _signature()->utf8_length(); | |
| 263 } | |
| 264 | |
| 265 | |
| 266 void SignatureStream::next_non_primitive(int t) { | |
| 267 switch (t) { | |
| 268 case 'L': { | |
| 269 _type = T_OBJECT; | |
| 270 symbolOop sig = _signature(); | |
| 271 while (sig->byte_at(_end++) != ';'); | |
| 272 break; | |
| 273 } | |
| 274 case '[': { | |
| 275 _type = T_ARRAY; | |
| 276 symbolOop sig = _signature(); | |
| 277 char c = sig->byte_at(_end); | |
| 278 while ('0' <= c && c <= '9') c = sig->byte_at(_end++); | |
| 279 while (sig->byte_at(_end) == '[') { | |
| 280 _end++; | |
| 281 c = sig->byte_at(_end); | |
| 282 while ('0' <= c && c <= '9') c = sig->byte_at(_end++); | |
| 283 } | |
| 284 switch(sig->byte_at(_end)) { | |
| 285 case 'B': | |
| 286 case 'C': | |
| 287 case 'D': | |
| 288 case 'F': | |
| 289 case 'I': | |
| 290 case 'J': | |
| 291 case 'S': | |
| 292 case 'Z':_end++; break; | |
| 293 default: { | |
| 294 while (sig->byte_at(_end++) != ';'); | |
| 295 break; | |
| 296 } | |
| 297 } | |
| 298 break; | |
| 299 } | |
| 300 case ')': _end++; next(); _at_return_type = true; break; | |
| 301 default : ShouldNotReachHere(); | |
| 302 } | |
| 303 } | |
| 304 | |
| 305 | |
| 306 bool SignatureStream::is_object() const { | |
| 307 return _type == T_OBJECT | |
| 308 || _type == T_ARRAY; | |
| 309 } | |
| 310 | |
| 311 bool SignatureStream::is_array() const { | |
| 312 return _type == T_ARRAY; | |
| 313 } | |
| 314 | |
| 315 symbolOop SignatureStream::as_symbol(TRAPS) { | |
| 316 // Create a symbol from for string _begin _end | |
| 317 int begin = _begin; | |
| 318 int end = _end; | |
| 319 | |
| 320 if ( _signature()->byte_at(_begin) == 'L' | |
| 321 && _signature()->byte_at(_end-1) == ';') { | |
| 322 begin++; | |
| 323 end--; | |
| 324 } | |
| 325 | |
| 326 symbolOop result = oopFactory::new_symbol(_signature, begin, end, CHECK_NULL); | |
| 327 return result; | |
| 328 } | |
| 329 | |
| 330 | |
| 331 symbolOop SignatureStream::as_symbol_or_null() { | |
| 332 // Create a symbol from for string _begin _end | |
| 333 ResourceMark rm; | |
| 334 | |
| 335 int begin = _begin; | |
| 336 int end = _end; | |
| 337 | |
| 338 if ( _signature()->byte_at(_begin) == 'L' | |
| 339 && _signature()->byte_at(_end-1) == ';') { | |
| 340 begin++; | |
| 341 end--; | |
| 342 } | |
| 343 | |
| 344 char* buffer = NEW_RESOURCE_ARRAY(char, end - begin); | |
| 345 for (int index = begin; index < end; index++) { | |
| 346 buffer[index - begin] = _signature()->byte_at(index); | |
| 347 } | |
| 348 symbolOop result = SymbolTable::probe(buffer, end - begin); | |
| 349 return result; | |
| 350 } | |
| 351 | |
| 352 bool SignatureVerifier::is_valid_signature(symbolHandle sig) { | |
| 353 const char* signature = (const char*)sig->bytes(); | |
| 354 ssize_t len = sig->utf8_length(); | |
| 355 if (signature == NULL || signature[0] == '\0' || len < 1) { | |
| 356 return false; | |
| 357 } else if (signature[0] == '(') { | |
| 358 return is_valid_method_signature(sig); | |
| 359 } else { | |
| 360 return is_valid_type_signature(sig); | |
| 361 } | |
| 362 } | |
| 363 | |
| 364 bool SignatureVerifier::is_valid_method_signature(symbolHandle sig) { | |
| 365 const char* method_sig = (const char*)sig->bytes(); | |
| 366 ssize_t len = sig->utf8_length(); | |
| 367 ssize_t index = 0; | |
| 368 if (method_sig != NULL && len > 1 && method_sig[index] == '(') { | |
| 369 ++index; | |
| 370 while (index < len && method_sig[index] != ')') { | |
| 371 ssize_t res = is_valid_type(&method_sig[index], len - index); | |
| 372 if (res == -1) { | |
| 373 return false; | |
| 374 } else { | |
| 375 index += res; | |
| 376 } | |
| 377 } | |
| 378 if (index < len && method_sig[index] == ')') { | |
| 379 // check the return type | |
| 380 ++index; | |
| 381 return (is_valid_type(&method_sig[index], len - index) == (len - index)); | |
| 382 } | |
| 383 } | |
| 384 return false; | |
| 385 } | |
| 386 | |
| 387 bool SignatureVerifier::is_valid_type_signature(symbolHandle sig) { | |
| 388 const char* type_sig = (const char*)sig->bytes(); | |
| 389 ssize_t len = sig->utf8_length(); | |
| 390 return (type_sig != NULL && len >= 1 && | |
| 391 (is_valid_type(type_sig, len) == len)); | |
| 392 } | |
| 393 | |
| 394 // Checks to see if the type (not to go beyond 'limit') refers to a valid type. | |
| 395 // Returns -1 if it is not, or the index of the next character that is not part | |
| 396 // of the type. The type encoding may end before 'limit' and that's ok. | |
| 397 ssize_t SignatureVerifier::is_valid_type(const char* type, ssize_t limit) { | |
| 398 ssize_t index = 0; | |
| 399 | |
| 400 // Iterate over any number of array dimensions | |
| 401 while (index < limit && type[index] == '[') ++index; | |
| 402 if (index >= limit) { | |
| 403 return -1; | |
| 404 } | |
| 405 switch (type[index]) { | |
| 406 case 'B': case 'C': case 'D': case 'F': case 'I': | |
| 407 case 'J': case 'S': case 'Z': case 'V': | |
| 408 return index + 1; | |
| 409 case 'L': | |
| 410 for (index = index + 1; index < limit; ++index) { | |
| 411 char c = type[index]; | |
| 412 if (c == ';') { | |
| 413 return index + 1; | |
| 414 } | |
| 415 if (invalid_name_char(c)) { | |
| 416 return -1; | |
| 417 } | |
| 418 } | |
| 419 // fall through | |
| 420 default: ; // fall through | |
| 421 } | |
| 422 return -1; | |
| 423 } | |
| 424 | |
| 425 bool SignatureVerifier::invalid_name_char(char c) { | |
| 426 switch (c) { | |
| 427 case '\0': case '.': case ';': case '[': | |
| 428 return true; | |
| 429 default: | |
| 430 return false; | |
| 431 } | |
| 432 } |