1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "jvm.h" 27 #include "memory/allocation.inline.hpp" 28 #include "oops/oop.inline.hpp" 29 #include "runtime/arguments.hpp" 30 #include "runtime/globals.hpp" 31 #include "runtime/globals_extension.hpp" 32 #include "runtime/commandLineFlagConstraintList.hpp" 33 #include "runtime/commandLineFlagWriteableList.hpp" 34 #include "runtime/commandLineFlagRangeList.hpp" 35 #include "runtime/os.hpp" 36 #include "runtime/sharedRuntime.hpp" 37 #include "trace/tracing.hpp" 38 #include "utilities/defaultStream.hpp" 39 #include "utilities/macros.hpp" 40 #include "utilities/ostream.hpp" 41 #include "utilities/stringUtils.hpp" 42 #if INCLUDE_ALL_GCS 43 #include "gc/g1/g1_globals.hpp" 44 #endif // INCLUDE_ALL_GCS 45 #ifdef COMPILER1 46 #include "c1/c1_globals.hpp" 47 #endif 48 #if INCLUDE_JVMCI 49 #include "jvmci/jvmci_globals.hpp" 50 #endif 51 #ifdef COMPILER2 52 #include "opto/c2_globals.hpp" 53 #endif 54 55 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, \ 56 MATERIALIZE_PD_DEVELOPER_FLAG, \ 57 MATERIALIZE_PRODUCT_FLAG, \ 58 MATERIALIZE_PD_PRODUCT_FLAG, \ 59 MATERIALIZE_DIAGNOSTIC_FLAG, \ 60 MATERIALIZE_PD_DIAGNOSTIC_FLAG, \ 61 MATERIALIZE_EXPERIMENTAL_FLAG, \ 62 MATERIALIZE_NOTPRODUCT_FLAG, \ 63 MATERIALIZE_MANAGEABLE_FLAG, \ 64 MATERIALIZE_PRODUCT_RW_FLAG, \ 65 MATERIALIZE_LP64_PRODUCT_FLAG, \ 66 IGNORE_RANGE, \ 67 IGNORE_CONSTRAINT, \ 68 IGNORE_WRITEABLE) 69 70 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, \ 71 MATERIALIZE_PD_DEVELOPER_FLAG, \ 72 MATERIALIZE_PRODUCT_FLAG, \ 73 MATERIALIZE_PD_PRODUCT_FLAG, \ 74 MATERIALIZE_DIAGNOSTIC_FLAG, \ 75 MATERIALIZE_PD_DIAGNOSTIC_FLAG, \ 76 MATERIALIZE_NOTPRODUCT_FLAG, \ 77 IGNORE_RANGE, \ 78 IGNORE_CONSTRAINT, \ 79 IGNORE_WRITEABLE) 80 81 ARCH_FLAGS(MATERIALIZE_DEVELOPER_FLAG, \ 82 MATERIALIZE_PRODUCT_FLAG, \ 83 MATERIALIZE_DIAGNOSTIC_FLAG, \ 84 MATERIALIZE_EXPERIMENTAL_FLAG, \ 85 MATERIALIZE_NOTPRODUCT_FLAG, \ 86 IGNORE_RANGE, \ 87 IGNORE_CONSTRAINT, \ 88 IGNORE_WRITEABLE) 89 90 MATERIALIZE_FLAGS_EXT 91 92 #define DEFAULT_RANGE_STR_CHUNK_SIZE 64 93 static char* create_range_str(const char *fmt, ...) { 94 static size_t string_length = DEFAULT_RANGE_STR_CHUNK_SIZE; 95 static char* range_string = NEW_C_HEAP_ARRAY(char, string_length, mtLogging); 96 97 int size_needed = 0; 98 do { 99 va_list args; 100 va_start(args, fmt); 101 size_needed = jio_vsnprintf(range_string, string_length, fmt, args); 102 va_end(args); 103 104 if (size_needed < 0) { 105 string_length += DEFAULT_RANGE_STR_CHUNK_SIZE; 106 range_string = REALLOC_C_HEAP_ARRAY(char, range_string, string_length, mtLogging); 107 guarantee(range_string != NULL, "create_range_str string should not be NULL"); 108 } 109 } while (size_needed < 0); 110 111 return range_string; 112 } 113 114 const char* Flag::get_int_default_range_str() { 115 return create_range_str("[ " INT32_FORMAT_W(-25) " ... " INT32_FORMAT_W(25) " ]", INT_MIN, INT_MAX); 116 } 117 118 const char* Flag::get_uint_default_range_str() { 119 return create_range_str("[ " UINT32_FORMAT_W(-25) " ... " UINT32_FORMAT_W(25) " ]", 0, UINT_MAX); 120 } 121 122 const char* Flag::get_intx_default_range_str() { 123 return create_range_str("[ " INTX_FORMAT_W(-25) " ... " INTX_FORMAT_W(25) " ]", min_intx, max_intx); 124 } 125 126 const char* Flag::get_uintx_default_range_str() { 127 return create_range_str("[ " UINTX_FORMAT_W(-25) " ... " UINTX_FORMAT_W(25) " ]", 0, max_uintx); 128 } 129 130 const char* Flag::get_uint64_t_default_range_str() { 131 return create_range_str("[ " UINT64_FORMAT_W(-25) " ... " UINT64_FORMAT_W(25) " ]", 0, uint64_t(max_juint)); 132 } 133 134 const char* Flag::get_size_t_default_range_str() { 135 return create_range_str("[ " SIZE_FORMAT_W(-25) " ... " SIZE_FORMAT_W(25) " ]", 0, SIZE_MAX); 136 } 137 138 const char* Flag::get_double_default_range_str() { 139 return create_range_str("[ %-25.3f ... %25.3f ]", DBL_MIN, DBL_MAX); 140 } 141 142 static bool is_product_build() { 143 #ifdef PRODUCT 144 return true; 145 #else 146 return false; 147 #endif 148 } 149 150 Flag::Error Flag::check_writable(bool changed) { 151 if (is_constant_in_binary()) { 152 fatal("flag is constant: %s", _name); 153 } 154 155 Flag::Error error = Flag::SUCCESS; 156 if (changed) { 157 CommandLineFlagWriteable* writeable = CommandLineFlagWriteableList::find(_name); 158 if (writeable) { 159 if (writeable->is_writeable() == false) { 160 switch (writeable->type()) 161 { 162 case CommandLineFlagWriteable::Once: 163 error = Flag::SET_ONLY_ONCE; 164 jio_fprintf(defaultStream::error_stream(), "Error: %s may not be set more than once\n", _name); 165 break; 166 case CommandLineFlagWriteable::CommandLineOnly: 167 error = Flag::COMMAND_LINE_ONLY; 168 jio_fprintf(defaultStream::error_stream(), "Error: %s may be modified only from commad line\n", _name); 169 break; 170 default: 171 ShouldNotReachHere(); 172 break; 173 } 174 } 175 writeable->mark_once(); 176 } 177 } 178 return error; 179 } 180 181 bool Flag::is_bool() const { 182 return strcmp(_type, "bool") == 0; 183 } 184 185 bool Flag::get_bool() const { 186 return *((bool*) _addr); 187 } 188 189 Flag::Error Flag::set_bool(bool value) { 190 Flag::Error error = check_writable(value!=get_bool()); 191 if (error == Flag::SUCCESS) { 192 *((bool*) _addr) = value; 193 } 194 return error; 195 } 196 197 bool Flag::is_int() const { 198 return strcmp(_type, "int") == 0; 199 } 200 201 int Flag::get_int() const { 202 return *((int*) _addr); 203 } 204 205 Flag::Error Flag::set_int(int value) { 206 Flag::Error error = check_writable(value!=get_int()); 207 if (error == Flag::SUCCESS) { 208 *((int*) _addr) = value; 209 } 210 return error; 211 } 212 213 bool Flag::is_uint() const { 214 return strcmp(_type, "uint") == 0; 215 } 216 217 uint Flag::get_uint() const { 218 return *((uint*) _addr); 219 } 220 221 Flag::Error Flag::set_uint(uint value) { 222 Flag::Error error = check_writable(value!=get_uint()); 223 if (error == Flag::SUCCESS) { 224 *((uint*) _addr) = value; 225 } 226 return error; 227 } 228 229 bool Flag::is_intx() const { 230 return strcmp(_type, "intx") == 0; 231 } 232 233 intx Flag::get_intx() const { 234 return *((intx*) _addr); 235 } 236 237 Flag::Error Flag::set_intx(intx value) { 238 Flag::Error error = check_writable(value!=get_intx()); 239 if (error == Flag::SUCCESS) { 240 *((intx*) _addr) = value; 241 } 242 return error; 243 } 244 245 bool Flag::is_uintx() const { 246 return strcmp(_type, "uintx") == 0; 247 } 248 249 uintx Flag::get_uintx() const { 250 return *((uintx*) _addr); 251 } 252 253 Flag::Error Flag::set_uintx(uintx value) { 254 Flag::Error error = check_writable(value!=get_uintx()); 255 if (error == Flag::SUCCESS) { 256 *((uintx*) _addr) = value; 257 } 258 return error; 259 } 260 261 bool Flag::is_uint64_t() const { 262 return strcmp(_type, "uint64_t") == 0; 263 } 264 265 uint64_t Flag::get_uint64_t() const { 266 return *((uint64_t*) _addr); 267 } 268 269 Flag::Error Flag::set_uint64_t(uint64_t value) { 270 Flag::Error error = check_writable(value!=get_uint64_t()); 271 if (error == Flag::SUCCESS) { 272 *((uint64_t*) _addr) = value; 273 } 274 return error; 275 } 276 277 bool Flag::is_size_t() const { 278 return strcmp(_type, "size_t") == 0; 279 } 280 281 size_t Flag::get_size_t() const { 282 return *((size_t*) _addr); 283 } 284 285 Flag::Error Flag::set_size_t(size_t value) { 286 Flag::Error error = check_writable(value!=get_size_t()); 287 if (error == Flag::SUCCESS) { 288 *((size_t*) _addr) = value; 289 } 290 return error; 291 } 292 293 bool Flag::is_double() const { 294 return strcmp(_type, "double") == 0; 295 } 296 297 double Flag::get_double() const { 298 return *((double*) _addr); 299 } 300 301 Flag::Error Flag::set_double(double value) { 302 Flag::Error error = check_writable(value!=get_double()); 303 if (error == Flag::SUCCESS) { 304 *((double*) _addr) = value; 305 } 306 return error; 307 } 308 309 bool Flag::is_ccstr() const { 310 return strcmp(_type, "ccstr") == 0 || strcmp(_type, "ccstrlist") == 0; 311 } 312 313 bool Flag::ccstr_accumulates() const { 314 return strcmp(_type, "ccstrlist") == 0; 315 } 316 317 ccstr Flag::get_ccstr() const { 318 return *((ccstr*) _addr); 319 } 320 321 Flag::Error Flag::set_ccstr(ccstr value) { 322 Flag::Error error = check_writable(value!=get_ccstr()); 323 if (error == Flag::SUCCESS) { 324 *((ccstr*) _addr) = value; 325 } 326 return error; 327 } 328 329 330 Flag::Flags Flag::get_origin() { 331 return Flags(_flags & VALUE_ORIGIN_MASK); 332 } 333 334 void Flag::set_origin(Flags origin) { 335 assert((origin & VALUE_ORIGIN_MASK) == origin, "sanity"); 336 Flags new_origin = Flags((origin == COMMAND_LINE) ? Flags(origin | ORIG_COMMAND_LINE) : origin); 337 _flags = Flags((_flags & ~VALUE_ORIGIN_MASK) | new_origin); 338 } 339 340 bool Flag::is_default() { 341 return (get_origin() == DEFAULT); 342 } 343 344 bool Flag::is_ergonomic() { 345 return (get_origin() == ERGONOMIC); 346 } 347 348 bool Flag::is_command_line() { 349 return (_flags & ORIG_COMMAND_LINE) != 0; 350 } 351 352 void Flag::set_command_line() { 353 _flags = Flags(_flags | ORIG_COMMAND_LINE); 354 } 355 356 bool Flag::is_product() const { 357 return (_flags & KIND_PRODUCT) != 0; 358 } 359 360 bool Flag::is_manageable() const { 361 return (_flags & KIND_MANAGEABLE) != 0; 362 } 363 364 bool Flag::is_diagnostic() const { 365 return (_flags & KIND_DIAGNOSTIC) != 0; 366 } 367 368 bool Flag::is_experimental() const { 369 return (_flags & KIND_EXPERIMENTAL) != 0; 370 } 371 372 bool Flag::is_notproduct() const { 373 return (_flags & KIND_NOT_PRODUCT) != 0; 374 } 375 376 bool Flag::is_develop() const { 377 return (_flags & KIND_DEVELOP) != 0; 378 } 379 380 bool Flag::is_read_write() const { 381 return (_flags & KIND_READ_WRITE) != 0; 382 } 383 384 bool Flag::is_commercial() const { 385 return (_flags & KIND_COMMERCIAL) != 0; 386 } 387 388 /** 389 * Returns if this flag is a constant in the binary. Right now this is 390 * true for notproduct and develop flags in product builds. 391 */ 392 bool Flag::is_constant_in_binary() const { 393 #ifdef PRODUCT 394 return is_notproduct() || is_develop(); 395 #else 396 return false; 397 #endif 398 } 399 400 bool Flag::is_unlocker() const { 401 return strcmp(_name, "UnlockDiagnosticVMOptions") == 0 || 402 strcmp(_name, "UnlockExperimentalVMOptions") == 0 || 403 is_unlocker_ext(); 404 } 405 406 bool Flag::is_unlocked() const { 407 if (is_diagnostic()) { 408 return UnlockDiagnosticVMOptions; 409 } 410 if (is_experimental()) { 411 return UnlockExperimentalVMOptions; 412 } 413 return is_unlocked_ext(); 414 } 415 416 void Flag::clear_diagnostic() { 417 assert(is_diagnostic(), "sanity"); 418 _flags = Flags(_flags & ~KIND_DIAGNOSTIC); 419 assert(!is_diagnostic(), "sanity"); 420 } 421 422 // Get custom message for this locked flag, or NULL if 423 // none is available. Returns message type produced. 424 Flag::MsgType Flag::get_locked_message(char* buf, int buflen) const { 425 buf[0] = '\0'; 426 if (is_diagnostic() && !is_unlocked()) { 427 jio_snprintf(buf, buflen, 428 "Error: VM option '%s' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.\n" 429 "Error: The unlock option must precede '%s'.\n", 430 _name, _name); 431 return Flag::DIAGNOSTIC_FLAG_BUT_LOCKED; 432 } 433 if (is_experimental() && !is_unlocked()) { 434 jio_snprintf(buf, buflen, 435 "Error: VM option '%s' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.\n" 436 "Error: The unlock option must precede '%s'.\n", 437 _name, _name); 438 return Flag::EXPERIMENTAL_FLAG_BUT_LOCKED; 439 } 440 if (is_develop() && is_product_build()) { 441 jio_snprintf(buf, buflen, "Error: VM option '%s' is develop and is available only in debug version of VM.\n", 442 _name); 443 return Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD; 444 } 445 if (is_notproduct() && is_product_build()) { 446 jio_snprintf(buf, buflen, "Error: VM option '%s' is notproduct and is available only in debug version of VM.\n", 447 _name); 448 return Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD; 449 } 450 get_locked_message_ext(buf, buflen); 451 return Flag::NONE; 452 } 453 454 bool Flag::is_writeable() const { 455 return is_manageable() || (is_product() && is_read_write()) || is_writeable_ext(); 456 } 457 458 // All flags except "manageable" are assumed to be internal flags. 459 // Long term, we need to define a mechanism to specify which flags 460 // are external/stable and change this function accordingly. 461 bool Flag::is_external() const { 462 return is_manageable() || is_external_ext(); 463 } 464 465 void Flag::print_on(outputStream* st, bool withComments, bool printRanges) { 466 // Don't print notproduct and develop flags in a product build. 467 if (is_constant_in_binary()) { 468 return; 469 } 470 471 if (!printRanges) { 472 // Use some named constants to make code more readable. 473 const unsigned int nSpaces = 10; 474 const unsigned int maxFlagLen = 40 + nSpaces; 475 476 // The print below assumes that the flag name is 40 characters or less. 477 // This works for most flags, but there are exceptions. Our longest flag 478 // name right now is UseAdaptiveGenerationSizePolicyAtMajorCollection and 479 // its minor collection buddy. These are 48 characters. We use a buffer of 480 // nSpaces spaces below to adjust the space between the flag value and the 481 // column of flag type and origin that is printed in the end of the line. 482 char spaces[nSpaces + 1] = " "; 483 st->print("%9s %-*s = ", _type, maxFlagLen-nSpaces, _name); 484 485 if (is_bool()) { 486 st->print("%-20s", get_bool() ? "true" : "false"); 487 } else if (is_int()) { 488 st->print("%-20d", get_int()); 489 } else if (is_uint()) { 490 st->print("%-20u", get_uint()); 491 } else if (is_intx()) { 492 st->print(INTX_FORMAT_W(-20), get_intx()); 493 } else if (is_uintx()) { 494 st->print(UINTX_FORMAT_W(-20), get_uintx()); 495 } else if (is_uint64_t()) { 496 st->print(UINT64_FORMAT_W(-20), get_uint64_t()); 497 } else if (is_size_t()) { 498 st->print(SIZE_FORMAT_W(-20), get_size_t()); 499 } else if (is_double()) { 500 st->print("%-20f", get_double()); 501 } else if (is_ccstr()) { 502 const char* cp = get_ccstr(); 503 if (cp != NULL) { 504 const char* eol; 505 while ((eol = strchr(cp, '\n')) != NULL) { 506 size_t llen = pointer_delta(eol, cp, sizeof(char)); 507 st->print("%.*s", (int)llen, cp); 508 st->cr(); 509 cp = eol+1; 510 st->print("%5s %-35s += ", "", _name); 511 } 512 st->print("%-20s", cp); 513 } 514 else st->print("%-20s", ""); 515 } 516 // Make sure we do not punch a '\0' at a negative char array index. 517 unsigned int nameLen = (unsigned int)strlen(_name); 518 if (nameLen <= maxFlagLen) { 519 spaces[maxFlagLen - MAX2(maxFlagLen-nSpaces, nameLen)] = '\0'; 520 st->print("%s", spaces); 521 } 522 print_kind_and_origin(st); 523 524 #ifndef PRODUCT 525 if (withComments) { 526 st->print("%s", _doc); 527 } 528 #endif 529 530 st->cr(); 531 532 } else if (!is_bool() && !is_ccstr()) { 533 st->print("%9s %-50s ", _type, _name); 534 535 RangeStrFunc func = NULL; 536 if (is_int()) { 537 func = Flag::get_int_default_range_str; 538 } else if (is_uint()) { 539 func = Flag::get_uint_default_range_str; 540 } else if (is_intx()) { 541 func = Flag::get_intx_default_range_str; 542 } else if (is_uintx()) { 543 func = Flag::get_uintx_default_range_str; 544 } else if (is_uint64_t()) { 545 func = Flag::get_uint64_t_default_range_str; 546 } else if (is_size_t()) { 547 func = Flag::get_size_t_default_range_str; 548 } else if (is_double()) { 549 func = Flag::get_double_default_range_str; 550 } else { 551 ShouldNotReachHere(); 552 } 553 CommandLineFlagRangeList::print(st, _name, func); 554 555 st->print(" %-16s", " "); 556 print_kind_and_origin(st); 557 558 #ifndef PRODUCT 559 if (withComments) { 560 st->print("%s", _doc); 561 } 562 #endif 563 564 st->cr(); 565 } 566 } 567 568 void Flag::print_kind_and_origin(outputStream* st) { 569 struct Data { 570 int flag; 571 const char* name; 572 }; 573 574 Data data[] = { 575 { KIND_JVMCI, "JVMCI" }, 576 { KIND_C1, "C1" }, 577 { KIND_C2, "C2" }, 578 { KIND_ARCH, "ARCH" }, 579 { KIND_PLATFORM_DEPENDENT, "pd" }, 580 { KIND_PRODUCT, "product" }, 581 { KIND_MANAGEABLE, "manageable" }, 582 { KIND_DIAGNOSTIC, "diagnostic" }, 583 { KIND_EXPERIMENTAL, "experimental" }, 584 { KIND_COMMERCIAL, "commercial" }, 585 { KIND_NOT_PRODUCT, "notproduct" }, 586 { KIND_DEVELOP, "develop" }, 587 { KIND_LP64_PRODUCT, "lp64_product" }, 588 { KIND_READ_WRITE, "rw" }, 589 { -1, "" } 590 }; 591 592 if ((_flags & KIND_MASK) != 0) { 593 bool is_first = true; 594 const size_t buffer_size = 64; 595 size_t buffer_used = 0; 596 char kind[buffer_size]; 597 598 jio_snprintf(kind, buffer_size, "{"); 599 buffer_used++; 600 for (int i = 0; data[i].flag != -1; i++) { 601 Data d = data[i]; 602 if ((_flags & d.flag) != 0) { 603 if (is_first) { 604 is_first = false; 605 } else { 606 assert(buffer_used + 1 < buffer_size, "Too small buffer"); 607 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, " "); 608 buffer_used++; 609 } 610 size_t length = strlen(d.name); 611 assert(buffer_used + length < buffer_size, "Too small buffer"); 612 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, "%s", d.name); 613 buffer_used += length; 614 } 615 } 616 assert(buffer_used + 2 <= buffer_size, "Too small buffer"); 617 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, "}"); 618 st->print("%20s", kind); 619 } 620 621 int origin = _flags & VALUE_ORIGIN_MASK; 622 st->print(" {"); 623 switch(origin) { 624 case DEFAULT: 625 st->print("default"); break; 626 case COMMAND_LINE: 627 st->print("command line"); break; 628 case ENVIRON_VAR: 629 st->print("environment"); break; 630 case CONFIG_FILE: 631 st->print("config file"); break; 632 case MANAGEMENT: 633 st->print("management"); break; 634 case ERGONOMIC: 635 if (_flags & ORIG_COMMAND_LINE) { 636 st->print("command line, "); 637 } 638 st->print("ergonomic"); break; 639 case ATTACH_ON_DEMAND: 640 st->print("attach"); break; 641 case INTERNAL: 642 st->print("internal"); break; 643 } 644 st->print("}"); 645 } 646 647 void Flag::print_as_flag(outputStream* st) { 648 if (is_bool()) { 649 st->print("-XX:%s%s", get_bool() ? "+" : "-", _name); 650 } else if (is_int()) { 651 st->print("-XX:%s=%d", _name, get_int()); 652 } else if (is_uint()) { 653 st->print("-XX:%s=%u", _name, get_uint()); 654 } else if (is_intx()) { 655 st->print("-XX:%s=" INTX_FORMAT, _name, get_intx()); 656 } else if (is_uintx()) { 657 st->print("-XX:%s=" UINTX_FORMAT, _name, get_uintx()); 658 } else if (is_uint64_t()) { 659 st->print("-XX:%s=" UINT64_FORMAT, _name, get_uint64_t()); 660 } else if (is_size_t()) { 661 st->print("-XX:%s=" SIZE_FORMAT, _name, get_size_t()); 662 } else if (is_double()) { 663 st->print("-XX:%s=%f", _name, get_double()); 664 } else if (is_ccstr()) { 665 st->print("-XX:%s=", _name); 666 const char* cp = get_ccstr(); 667 if (cp != NULL) { 668 // Need to turn embedded '\n's back into separate arguments 669 // Not so efficient to print one character at a time, 670 // but the choice is to do the transformation to a buffer 671 // and print that. And this need not be efficient. 672 for (; *cp != '\0'; cp += 1) { 673 switch (*cp) { 674 default: 675 st->print("%c", *cp); 676 break; 677 case '\n': 678 st->print(" -XX:%s=", _name); 679 break; 680 } 681 } 682 } 683 } else { 684 ShouldNotReachHere(); 685 } 686 } 687 688 const char* Flag::flag_error_str(Flag::Error error) { 689 switch (error) { 690 case Flag::MISSING_NAME: return "MISSING_NAME"; 691 case Flag::MISSING_VALUE: return "MISSING_VALUE"; 692 case Flag::NON_WRITABLE: return "NON_WRITABLE"; 693 case Flag::OUT_OF_BOUNDS: return "OUT_OF_BOUNDS"; 694 case Flag::VIOLATES_CONSTRAINT: return "VIOLATES_CONSTRAINT"; 695 case Flag::INVALID_FLAG: return "INVALID_FLAG"; 696 case Flag::ERR_OTHER: return "ERR_OTHER"; 697 case Flag::SUCCESS: return "SUCCESS"; 698 default: ShouldNotReachHere(); return "NULL"; 699 } 700 } 701 702 // 4991491 do not "optimize out" the was_set false values: omitting them 703 // tickles a Microsoft compiler bug causing flagTable to be malformed 704 705 #define RUNTIME_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT) }, 706 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) }, 707 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DIAGNOSTIC) }, 708 #define RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DIAGNOSTIC | Flag::KIND_PLATFORM_DEPENDENT) }, 709 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_EXPERIMENTAL) }, 710 #define RUNTIME_MANAGEABLE_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_MANAGEABLE) }, 711 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT | Flag::KIND_READ_WRITE) }, 712 #define RUNTIME_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DEVELOP) }, 713 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) }, 714 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_NOT_PRODUCT) }, 715 716 #define JVMCI_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_PRODUCT) }, 717 #define JVMCI_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) }, 718 #define JVMCI_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_DIAGNOSTIC) }, 719 #define JVMCI_PD_DIAGNOSTIC_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_DIAGNOSTIC | Flag::KIND_PLATFORM_DEPENDENT) }, 720 #define JVMCI_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_EXPERIMENTAL) }, 721 #define JVMCI_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_DEVELOP) }, 722 #define JVMCI_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) }, 723 #define JVMCI_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_NOT_PRODUCT) }, 724 725 #ifdef _LP64 726 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_LP64_PRODUCT) }, 727 #else 728 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */ 729 #endif // _LP64 730 731 #define C1_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_PRODUCT) }, 732 #define C1_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) }, 733 #define C1_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DIAGNOSTIC) }, 734 #define C1_PD_DIAGNOSTIC_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DIAGNOSTIC | Flag::KIND_PLATFORM_DEPENDENT) }, 735 #define C1_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DEVELOP) }, 736 #define C1_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) }, 737 #define C1_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_NOT_PRODUCT) }, 738 739 #define C2_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_PRODUCT) }, 740 #define C2_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) }, 741 #define C2_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DIAGNOSTIC) }, 742 #define C2_PD_DIAGNOSTIC_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DIAGNOSTIC | Flag::KIND_PLATFORM_DEPENDENT) }, 743 #define C2_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_EXPERIMENTAL) }, 744 #define C2_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP) }, 745 #define C2_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) }, 746 #define C2_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_NOT_PRODUCT) }, 747 748 #define ARCH_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_PRODUCT) }, 749 #define ARCH_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DIAGNOSTIC) }, 750 #define ARCH_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_EXPERIMENTAL) }, 751 #define ARCH_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DEVELOP) }, 752 #define ARCH_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_NOT_PRODUCT) }, 753 754 static Flag flagTable[] = { 755 RUNTIME_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \ 756 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \ 757 RUNTIME_PRODUCT_FLAG_STRUCT, \ 758 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \ 759 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \ 760 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \ 761 RUNTIME_EXPERIMENTAL_FLAG_STRUCT, \ 762 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \ 763 RUNTIME_MANAGEABLE_FLAG_STRUCT, \ 764 RUNTIME_PRODUCT_RW_FLAG_STRUCT, \ 765 RUNTIME_LP64_PRODUCT_FLAG_STRUCT, \ 766 IGNORE_RANGE, \ 767 IGNORE_CONSTRAINT, \ 768 IGNORE_WRITEABLE) 769 RUNTIME_OS_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \ 770 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \ 771 RUNTIME_PRODUCT_FLAG_STRUCT, \ 772 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \ 773 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \ 774 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \ 775 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \ 776 IGNORE_RANGE, \ 777 IGNORE_CONSTRAINT, \ 778 IGNORE_WRITEABLE) 779 #if INCLUDE_ALL_GCS 780 G1_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \ 781 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \ 782 RUNTIME_PRODUCT_FLAG_STRUCT, \ 783 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \ 784 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \ 785 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \ 786 RUNTIME_EXPERIMENTAL_FLAG_STRUCT, \ 787 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \ 788 RUNTIME_MANAGEABLE_FLAG_STRUCT, \ 789 RUNTIME_PRODUCT_RW_FLAG_STRUCT, \ 790 IGNORE_RANGE, \ 791 IGNORE_CONSTRAINT, \ 792 IGNORE_WRITEABLE) 793 #endif // INCLUDE_ALL_GCS 794 #if INCLUDE_JVMCI 795 JVMCI_FLAGS(JVMCI_DEVELOP_FLAG_STRUCT, \ 796 JVMCI_PD_DEVELOP_FLAG_STRUCT, \ 797 JVMCI_PRODUCT_FLAG_STRUCT, \ 798 JVMCI_PD_PRODUCT_FLAG_STRUCT, \ 799 JVMCI_DIAGNOSTIC_FLAG_STRUCT, \ 800 JVMCI_PD_DIAGNOSTIC_FLAG_STRUCT, \ 801 JVMCI_EXPERIMENTAL_FLAG_STRUCT, \ 802 JVMCI_NOTPRODUCT_FLAG_STRUCT, \ 803 IGNORE_RANGE, \ 804 IGNORE_CONSTRAINT, \ 805 IGNORE_WRITEABLE) 806 #endif // INCLUDE_JVMCI 807 #ifdef COMPILER1 808 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, \ 809 C1_PD_DEVELOP_FLAG_STRUCT, \ 810 C1_PRODUCT_FLAG_STRUCT, \ 811 C1_PD_PRODUCT_FLAG_STRUCT, \ 812 C1_DIAGNOSTIC_FLAG_STRUCT, \ 813 C1_PD_DIAGNOSTIC_FLAG_STRUCT, \ 814 C1_NOTPRODUCT_FLAG_STRUCT, \ 815 IGNORE_RANGE, \ 816 IGNORE_CONSTRAINT, \ 817 IGNORE_WRITEABLE) 818 #endif // COMPILER1 819 #ifdef COMPILER2 820 C2_FLAGS(C2_DEVELOP_FLAG_STRUCT, \ 821 C2_PD_DEVELOP_FLAG_STRUCT, \ 822 C2_PRODUCT_FLAG_STRUCT, \ 823 C2_PD_PRODUCT_FLAG_STRUCT, \ 824 C2_DIAGNOSTIC_FLAG_STRUCT, \ 825 C2_PD_DIAGNOSTIC_FLAG_STRUCT, \ 826 C2_EXPERIMENTAL_FLAG_STRUCT, \ 827 C2_NOTPRODUCT_FLAG_STRUCT, \ 828 IGNORE_RANGE, \ 829 IGNORE_CONSTRAINT, \ 830 IGNORE_WRITEABLE) 831 #endif // COMPILER2 832 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, \ 833 ARCH_PRODUCT_FLAG_STRUCT, \ 834 ARCH_DIAGNOSTIC_FLAG_STRUCT, \ 835 ARCH_EXPERIMENTAL_FLAG_STRUCT, \ 836 ARCH_NOTPRODUCT_FLAG_STRUCT, \ 837 IGNORE_RANGE, \ 838 IGNORE_CONSTRAINT, \ 839 IGNORE_WRITEABLE) 840 FLAGTABLE_EXT 841 {0, NULL, NULL} 842 }; 843 844 Flag* Flag::flags = flagTable; 845 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag)); 846 847 inline bool str_equal(const char* s, size_t s_len, const char* q, size_t q_len) { 848 if (s_len != q_len) return false; 849 return memcmp(s, q, q_len) == 0; 850 } 851 852 // Search the flag table for a named flag 853 Flag* Flag::find_flag(const char* name, size_t length, bool allow_locked, bool return_flag) { 854 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) { 855 if (str_equal(current->_name, current->get_name_length(), name, length)) { 856 // Found a matching entry. 857 // Don't report notproduct and develop flags in product builds. 858 if (current->is_constant_in_binary()) { 859 return (return_flag ? current : NULL); 860 } 861 // Report locked flags only if allowed. 862 if (!(current->is_unlocked() || current->is_unlocker())) { 863 if (!allow_locked) { 864 // disable use of locked flags, e.g. diagnostic, experimental, 865 // commercial... until they are explicitly unlocked 866 return NULL; 867 } 868 } 869 return current; 870 } 871 } 872 // Flag name is not in the flag table 873 return NULL; 874 } 875 876 // Get or compute the flag name length 877 size_t Flag::get_name_length() { 878 if (_name_len == 0) { 879 _name_len = strlen(_name); 880 } 881 return _name_len; 882 } 883 884 Flag* Flag::fuzzy_match(const char* name, size_t length, bool allow_locked) { 885 float VMOptionsFuzzyMatchSimilarity = 0.7f; 886 Flag* match = NULL; 887 float score; 888 float max_score = -1; 889 890 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) { 891 score = StringUtils::similarity(current->_name, strlen(current->_name), name, length); 892 if (score > max_score) { 893 max_score = score; 894 match = current; 895 } 896 } 897 898 if (!(match->is_unlocked() || match->is_unlocker())) { 899 if (!allow_locked) { 900 return NULL; 901 } 902 } 903 904 if (max_score < VMOptionsFuzzyMatchSimilarity) { 905 return NULL; 906 } 907 908 return match; 909 } 910 911 // Returns the address of the index'th element 912 static Flag* address_of_flag(CommandLineFlagWithType flag) { 913 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); 914 return &Flag::flags[flag]; 915 } 916 917 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) { 918 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); 919 Flag* f = &Flag::flags[flag]; 920 return f->is_default(); 921 } 922 923 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) { 924 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); 925 Flag* f = &Flag::flags[flag]; 926 return f->is_ergonomic(); 927 } 928 929 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) { 930 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); 931 Flag* f = &Flag::flags[flag]; 932 return f->is_command_line(); 933 } 934 935 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) { 936 Flag* result = Flag::find_flag((char*)name, strlen(name)); 937 if (result == NULL) return false; 938 *value = result->is_command_line(); 939 return true; 940 } 941 942 void CommandLineFlagsEx::setOnCmdLine(CommandLineFlagWithType flag) { 943 Flag* faddr = address_of_flag(flag); 944 assert(faddr != NULL, "Unknown flag"); 945 faddr->set_command_line(); 946 } 947 948 template<class E, class T> 949 static void trace_flag_changed(const char* name, const T old_value, const T new_value, const Flag::Flags origin) { 950 E e; 951 e.set_name(name); 952 e.set_oldValue(old_value); 953 e.set_newValue(new_value); 954 e.set_origin(origin); 955 e.commit(); 956 } 957 958 static Flag::Error apply_constraint_and_check_range_bool(const char* name, bool new_value, bool verbose) { 959 Flag::Error status = Flag::SUCCESS; 960 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name); 961 if (constraint != NULL) { 962 status = constraint->apply_bool(new_value, verbose); 963 } 964 return status; 965 } 966 967 Flag::Error CommandLineFlags::boolAt(const char* name, size_t len, bool* value, bool allow_locked, bool return_flag) { 968 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 969 if (result == NULL) return Flag::INVALID_FLAG; 970 if (!result->is_bool()) return Flag::WRONG_FORMAT; 971 *value = result->get_bool(); 972 return Flag::SUCCESS; 973 } 974 975 Flag::Error CommandLineFlags::boolAtPut(Flag* flag, bool* value, Flag::Flags origin) { 976 const char* name; 977 if (flag == NULL) return Flag::INVALID_FLAG; 978 if (!flag->is_bool()) return Flag::WRONG_FORMAT; 979 name = flag->_name; 980 Flag::Error check = apply_constraint_and_check_range_bool(name, *value, !CommandLineFlagConstraintList::validated_after_ergo()); 981 if (check != Flag::SUCCESS) return check; 982 bool old_value = flag->get_bool(); 983 trace_flag_changed<EventBooleanFlagChanged, bool>(name, old_value, *value, origin); 984 check = flag->set_bool(*value); 985 *value = old_value; 986 flag->set_origin(origin); 987 return check; 988 } 989 990 Flag::Error CommandLineFlags::boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin) { 991 Flag* result = Flag::find_flag(name, len); 992 return boolAtPut(result, value, origin); 993 } 994 995 Flag::Error CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, Flag::Flags origin) { 996 Flag* faddr = address_of_flag(flag); 997 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type"); 998 return CommandLineFlags::boolAtPut(faddr, &value, origin); 999 } 1000 1001 static Flag::Error apply_constraint_and_check_range_int(const char* name, int new_value, bool verbose) { 1002 Flag::Error status = Flag::SUCCESS; 1003 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name); 1004 if (range != NULL) { 1005 status = range->check_int(new_value, verbose); 1006 } 1007 if (status == Flag::SUCCESS) { 1008 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name); 1009 if (constraint != NULL) { 1010 status = constraint->apply_int(new_value, verbose); 1011 } 1012 } 1013 return status; 1014 } 1015 1016 Flag::Error CommandLineFlags::intAt(const char* name, size_t len, int* value, bool allow_locked, bool return_flag) { 1017 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 1018 if (result == NULL) return Flag::INVALID_FLAG; 1019 if (!result->is_int()) return Flag::WRONG_FORMAT; 1020 *value = result->get_int(); 1021 return Flag::SUCCESS; 1022 } 1023 1024 Flag::Error CommandLineFlags::intAtPut(Flag* flag, int* value, Flag::Flags origin) { 1025 const char* name; 1026 if (flag == NULL) return Flag::INVALID_FLAG; 1027 if (!flag->is_int()) return Flag::WRONG_FORMAT; 1028 name = flag->_name; 1029 Flag::Error check = apply_constraint_and_check_range_int(name, *value, !CommandLineFlagConstraintList::validated_after_ergo()); 1030 if (check != Flag::SUCCESS) return check; 1031 int old_value = flag->get_int(); 1032 trace_flag_changed<EventIntFlagChanged, s4>(name, old_value, *value, origin); 1033 check = flag->set_int(*value); 1034 *value = old_value; 1035 flag->set_origin(origin); 1036 return check; 1037 } 1038 1039 Flag::Error CommandLineFlags::intAtPut(const char* name, size_t len, int* value, Flag::Flags origin) { 1040 Flag* result = Flag::find_flag(name, len); 1041 return intAtPut(result, value, origin); 1042 } 1043 1044 Flag::Error CommandLineFlagsEx::intAtPut(CommandLineFlagWithType flag, int value, Flag::Flags origin) { 1045 Flag* faddr = address_of_flag(flag); 1046 guarantee(faddr != NULL && faddr->is_int(), "wrong flag type"); 1047 return CommandLineFlags::intAtPut(faddr, &value, origin); 1048 } 1049 1050 static Flag::Error apply_constraint_and_check_range_uint(const char* name, uint new_value, bool verbose) { 1051 Flag::Error status = Flag::SUCCESS; 1052 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name); 1053 if (range != NULL) { 1054 status = range->check_uint(new_value, verbose); 1055 } 1056 if (status == Flag::SUCCESS) { 1057 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name); 1058 if (constraint != NULL) { 1059 status = constraint->apply_uint(new_value, verbose); 1060 } 1061 } 1062 return status; 1063 } 1064 1065 Flag::Error CommandLineFlags::uintAt(const char* name, size_t len, uint* value, bool allow_locked, bool return_flag) { 1066 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 1067 if (result == NULL) return Flag::INVALID_FLAG; 1068 if (!result->is_uint()) return Flag::WRONG_FORMAT; 1069 *value = result->get_uint(); 1070 return Flag::SUCCESS; 1071 } 1072 1073 Flag::Error CommandLineFlags::uintAtPut(Flag* flag, uint* value, Flag::Flags origin) { 1074 const char* name; 1075 if (flag == NULL) return Flag::INVALID_FLAG; 1076 if (!flag->is_uint()) return Flag::WRONG_FORMAT; 1077 name = flag->_name; 1078 Flag::Error check = apply_constraint_and_check_range_uint(name, *value, !CommandLineFlagConstraintList::validated_after_ergo()); 1079 if (check != Flag::SUCCESS) return check; 1080 uint old_value = flag->get_uint(); 1081 trace_flag_changed<EventUnsignedIntFlagChanged, u4>(name, old_value, *value, origin); 1082 check = flag->set_uint(*value); 1083 *value = old_value; 1084 flag->set_origin(origin); 1085 return check; 1086 } 1087 1088 Flag::Error CommandLineFlags::uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin) { 1089 Flag* result = Flag::find_flag(name, len); 1090 return uintAtPut(result, value, origin); 1091 } 1092 1093 Flag::Error CommandLineFlagsEx::uintAtPut(CommandLineFlagWithType flag, uint value, Flag::Flags origin) { 1094 Flag* faddr = address_of_flag(flag); 1095 guarantee(faddr != NULL && faddr->is_uint(), "wrong flag type"); 1096 return CommandLineFlags::uintAtPut(faddr, &value, origin); 1097 } 1098 1099 Flag::Error CommandLineFlags::intxAt(const char* name, size_t len, intx* value, bool allow_locked, bool return_flag) { 1100 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 1101 if (result == NULL) return Flag::INVALID_FLAG; 1102 if (!result->is_intx()) return Flag::WRONG_FORMAT; 1103 *value = result->get_intx(); 1104 return Flag::SUCCESS; 1105 } 1106 1107 static Flag::Error apply_constraint_and_check_range_intx(const char* name, intx new_value, bool verbose) { 1108 Flag::Error status = Flag::SUCCESS; 1109 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name); 1110 if (range != NULL) { 1111 status = range->check_intx(new_value, verbose); 1112 } 1113 if (status == Flag::SUCCESS) { 1114 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name); 1115 if (constraint != NULL) { 1116 status = constraint->apply_intx(new_value, verbose); 1117 } 1118 } 1119 return status; 1120 } 1121 1122 Flag::Error CommandLineFlags::intxAtPut(Flag* flag, intx* value, Flag::Flags origin) { 1123 const char* name; 1124 if (flag == NULL) return Flag::INVALID_FLAG; 1125 if (!flag->is_intx()) return Flag::WRONG_FORMAT; 1126 name = flag->_name; 1127 Flag::Error check = apply_constraint_and_check_range_intx(name, *value, !CommandLineFlagConstraintList::validated_after_ergo()); 1128 if (check != Flag::SUCCESS) return check; 1129 intx old_value = flag->get_intx(); 1130 trace_flag_changed<EventLongFlagChanged, intx>(name, old_value, *value, origin); 1131 check = flag->set_intx(*value); 1132 *value = old_value; 1133 flag->set_origin(origin); 1134 return check; 1135 } 1136 1137 Flag::Error CommandLineFlags::intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin) { 1138 Flag* result = Flag::find_flag(name, len); 1139 return intxAtPut(result, value, origin); 1140 } 1141 1142 Flag::Error CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, Flag::Flags origin) { 1143 Flag* faddr = address_of_flag(flag); 1144 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type"); 1145 return CommandLineFlags::intxAtPut(faddr, &value, origin); 1146 } 1147 1148 Flag::Error CommandLineFlags::uintxAt(const char* name, size_t len, uintx* value, bool allow_locked, bool return_flag) { 1149 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 1150 if (result == NULL) return Flag::INVALID_FLAG; 1151 if (!result->is_uintx()) return Flag::WRONG_FORMAT; 1152 *value = result->get_uintx(); 1153 return Flag::SUCCESS; 1154 } 1155 1156 static Flag::Error apply_constraint_and_check_range_uintx(const char* name, uintx new_value, bool verbose) { 1157 Flag::Error status = Flag::SUCCESS; 1158 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name); 1159 if (range != NULL) { 1160 status = range->check_uintx(new_value, verbose); 1161 } 1162 if (status == Flag::SUCCESS) { 1163 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name); 1164 if (constraint != NULL) { 1165 status = constraint->apply_uintx(new_value, verbose); 1166 } 1167 } 1168 return status; 1169 } 1170 1171 Flag::Error CommandLineFlags::uintxAtPut(Flag* flag, uintx* value, Flag::Flags origin) { 1172 const char* name; 1173 if (flag == NULL) return Flag::INVALID_FLAG; 1174 if (!flag->is_uintx()) return Flag::WRONG_FORMAT; 1175 name = flag->_name; 1176 Flag::Error check = apply_constraint_and_check_range_uintx(name, *value, !CommandLineFlagConstraintList::validated_after_ergo()); 1177 if (check != Flag::SUCCESS) return check; 1178 uintx old_value = flag->get_uintx(); 1179 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin); 1180 check = flag->set_uintx(*value); 1181 *value = old_value; 1182 flag->set_origin(origin); 1183 return check; 1184 } 1185 1186 Flag::Error CommandLineFlags::uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin) { 1187 Flag* result = Flag::find_flag(name, len); 1188 return uintxAtPut(result, value, origin); 1189 } 1190 1191 Flag::Error CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, Flag::Flags origin) { 1192 Flag* faddr = address_of_flag(flag); 1193 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type"); 1194 return CommandLineFlags::uintxAtPut(faddr, &value, origin); 1195 } 1196 1197 Flag::Error CommandLineFlags::uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked, bool return_flag) { 1198 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 1199 if (result == NULL) return Flag::INVALID_FLAG; 1200 if (!result->is_uint64_t()) return Flag::WRONG_FORMAT; 1201 *value = result->get_uint64_t(); 1202 return Flag::SUCCESS; 1203 } 1204 1205 static Flag::Error apply_constraint_and_check_range_uint64_t(const char* name, uint64_t new_value, bool verbose) { 1206 Flag::Error status = Flag::SUCCESS; 1207 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name); 1208 if (range != NULL) { 1209 status = range->check_uint64_t(new_value, verbose); 1210 } 1211 if (status == Flag::SUCCESS) { 1212 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name); 1213 if (constraint != NULL) { 1214 status = constraint->apply_uint64_t(new_value, verbose); 1215 } 1216 } 1217 return status; 1218 } 1219 1220 Flag::Error CommandLineFlags::uint64_tAtPut(Flag* flag, uint64_t* value, Flag::Flags origin) { 1221 const char* name; 1222 if (flag == NULL) return Flag::INVALID_FLAG; 1223 if (!flag->is_uint64_t()) return Flag::WRONG_FORMAT; 1224 name = flag->_name; 1225 Flag::Error check = apply_constraint_and_check_range_uint64_t(name, *value, !CommandLineFlagConstraintList::validated_after_ergo()); 1226 if (check != Flag::SUCCESS) return check; 1227 uint64_t old_value = flag->get_uint64_t(); 1228 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin); 1229 check = flag->set_uint64_t(*value); 1230 *value = old_value; 1231 flag->set_origin(origin); 1232 return check; 1233 } 1234 1235 Flag::Error CommandLineFlags::uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin) { 1236 Flag* result = Flag::find_flag(name, len); 1237 return uint64_tAtPut(result, value, origin); 1238 } 1239 1240 Flag::Error CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, Flag::Flags origin) { 1241 Flag* faddr = address_of_flag(flag); 1242 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type"); 1243 return CommandLineFlags::uint64_tAtPut(faddr, &value, origin); 1244 } 1245 1246 Flag::Error CommandLineFlags::size_tAt(const char* name, size_t len, size_t* value, bool allow_locked, bool return_flag) { 1247 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 1248 if (result == NULL) return Flag::INVALID_FLAG; 1249 if (!result->is_size_t()) return Flag::WRONG_FORMAT; 1250 *value = result->get_size_t(); 1251 return Flag::SUCCESS; 1252 } 1253 1254 static Flag::Error apply_constraint_and_check_range_size_t(const char* name, size_t new_value, bool verbose) { 1255 Flag::Error status = Flag::SUCCESS; 1256 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name); 1257 if (range != NULL) { 1258 status = range->check_size_t(new_value, verbose); 1259 } 1260 if (status == Flag::SUCCESS) { 1261 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name); 1262 if (constraint != NULL) { 1263 status = constraint->apply_size_t(new_value, verbose); 1264 } 1265 } 1266 return status; 1267 } 1268 1269 1270 Flag::Error CommandLineFlags::size_tAtPut(Flag* flag, size_t* value, Flag::Flags origin) { 1271 const char* name; 1272 if (flag == NULL) return Flag::INVALID_FLAG; 1273 if (!flag->is_size_t()) return Flag::WRONG_FORMAT; 1274 name = flag->_name; 1275 Flag::Error check = apply_constraint_and_check_range_size_t(name, *value, !CommandLineFlagConstraintList::validated_after_ergo()); 1276 if (check != Flag::SUCCESS) return check; 1277 size_t old_value = flag->get_size_t(); 1278 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin); 1279 check = flag->set_size_t(*value); 1280 *value = old_value; 1281 flag->set_origin(origin); 1282 return check; 1283 } 1284 1285 Flag::Error CommandLineFlags::size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin) { 1286 Flag* result = Flag::find_flag(name, len); 1287 return size_tAtPut(result, value, origin); 1288 } 1289 1290 Flag::Error CommandLineFlagsEx::size_tAtPut(CommandLineFlagWithType flag, size_t value, Flag::Flags origin) { 1291 Flag* faddr = address_of_flag(flag); 1292 guarantee(faddr != NULL && faddr->is_size_t(), "wrong flag type"); 1293 return CommandLineFlags::size_tAtPut(faddr, &value, origin); 1294 } 1295 1296 Flag::Error CommandLineFlags::doubleAt(const char* name, size_t len, double* value, bool allow_locked, bool return_flag) { 1297 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 1298 if (result == NULL) return Flag::INVALID_FLAG; 1299 if (!result->is_double()) return Flag::WRONG_FORMAT; 1300 *value = result->get_double(); 1301 return Flag::SUCCESS; 1302 } 1303 1304 static Flag::Error apply_constraint_and_check_range_double(const char* name, double new_value, bool verbose) { 1305 Flag::Error status = Flag::SUCCESS; 1306 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name); 1307 if (range != NULL) { 1308 status = range->check_double(new_value, verbose); 1309 } 1310 if (status == Flag::SUCCESS) { 1311 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name); 1312 if (constraint != NULL) { 1313 status = constraint->apply_double(new_value, verbose); 1314 } 1315 } 1316 return status; 1317 } 1318 1319 Flag::Error CommandLineFlags::doubleAtPut(Flag* flag, double* value, Flag::Flags origin) { 1320 const char* name; 1321 if (flag == NULL) return Flag::INVALID_FLAG; 1322 if (!flag->is_double()) return Flag::WRONG_FORMAT; 1323 name = flag->_name; 1324 Flag::Error check = apply_constraint_and_check_range_double(name, *value, !CommandLineFlagConstraintList::validated_after_ergo()); 1325 if (check != Flag::SUCCESS) return check; 1326 double old_value = flag->get_double(); 1327 trace_flag_changed<EventDoubleFlagChanged, double>(name, old_value, *value, origin); 1328 check = flag->set_double(*value); 1329 *value = old_value; 1330 flag->set_origin(origin); 1331 return check; 1332 } 1333 1334 Flag::Error CommandLineFlags::doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin) { 1335 Flag* result = Flag::find_flag(name, len); 1336 return doubleAtPut(result, value, origin); 1337 } 1338 1339 Flag::Error CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, Flag::Flags origin) { 1340 Flag* faddr = address_of_flag(flag); 1341 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type"); 1342 return CommandLineFlags::doubleAtPut(faddr, &value, origin); 1343 } 1344 1345 Flag::Error CommandLineFlags::ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked, bool return_flag) { 1346 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 1347 if (result == NULL) return Flag::INVALID_FLAG; 1348 if (!result->is_ccstr()) return Flag::WRONG_FORMAT; 1349 *value = result->get_ccstr(); 1350 return Flag::SUCCESS; 1351 } 1352 1353 Flag::Error CommandLineFlags::ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin) { 1354 Flag* result = Flag::find_flag(name, len); 1355 if (result == NULL) return Flag::INVALID_FLAG; 1356 if (!result->is_ccstr()) return Flag::WRONG_FORMAT; 1357 ccstr old_value = result->get_ccstr(); 1358 trace_flag_changed<EventStringFlagChanged, const char*>(name, old_value, *value, origin); 1359 char* new_value = NULL; 1360 if (*value != NULL) { 1361 new_value = os::strdup_check_oom(*value); 1362 } 1363 Flag::Error check = result->set_ccstr(new_value); 1364 if (result->is_default() && old_value != NULL) { 1365 // Prior value is NOT heap allocated, but was a literal constant. 1366 old_value = os::strdup_check_oom(old_value); 1367 } 1368 *value = old_value; 1369 result->set_origin(origin); 1370 return check; 1371 } 1372 1373 Flag::Error CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, Flag::Flags origin) { 1374 Flag* faddr = address_of_flag(flag); 1375 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type"); 1376 ccstr old_value = faddr->get_ccstr(); 1377 trace_flag_changed<EventStringFlagChanged, const char*>(faddr->_name, old_value, value, origin); 1378 char* new_value = os::strdup_check_oom(value); 1379 Flag::Error check = faddr->set_ccstr(new_value); 1380 if (!faddr->is_default() && old_value != NULL) { 1381 // Prior value is heap allocated so free it. 1382 FREE_C_HEAP_ARRAY(char, old_value); 1383 } 1384 faddr->set_origin(origin); 1385 return check; 1386 } 1387 1388 extern "C" { 1389 static int compare_flags(const void* void_a, const void* void_b) { 1390 return strcmp((*((Flag**) void_a))->_name, (*((Flag**) void_b))->_name); 1391 } 1392 } 1393 1394 void CommandLineFlags::printSetFlags(outputStream* out) { 1395 // Print which flags were set on the command line 1396 // note: this method is called before the thread structure is in place 1397 // which means resource allocation cannot be used. 1398 1399 // The last entry is the null entry. 1400 const size_t length = Flag::numFlags - 1; 1401 1402 // Sort 1403 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtArguments); 1404 for (size_t i = 0; i < length; i++) { 1405 array[i] = &flagTable[i]; 1406 } 1407 qsort(array, length, sizeof(Flag*), compare_flags); 1408 1409 // Print 1410 for (size_t i = 0; i < length; i++) { 1411 if (array[i]->get_origin() /* naked field! */) { 1412 array[i]->print_as_flag(out); 1413 out->print(" "); 1414 } 1415 } 1416 out->cr(); 1417 FREE_C_HEAP_ARRAY(Flag*, array); 1418 } 1419 1420 #ifndef PRODUCT 1421 1422 void CommandLineFlags::verify() { 1423 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict"); 1424 } 1425 1426 #endif // PRODUCT 1427 1428 void CommandLineFlags::printFlags(outputStream* out, bool withComments, bool printRanges) { 1429 // Print the flags sorted by name 1430 // note: this method is called before the thread structure is in place 1431 // which means resource allocation cannot be used. 1432 1433 // The last entry is the null entry. 1434 const size_t length = Flag::numFlags - 1; 1435 1436 // Sort 1437 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtArguments); 1438 for (size_t i = 0; i < length; i++) { 1439 array[i] = &flagTable[i]; 1440 } 1441 qsort(array, length, sizeof(Flag*), compare_flags); 1442 1443 // Print 1444 if (!printRanges) { 1445 out->print_cr("[Global flags]"); 1446 } else { 1447 out->print_cr("[Global flags ranges]"); 1448 } 1449 1450 for (size_t i = 0; i < length; i++) { 1451 if (array[i]->is_unlocked()) { 1452 array[i]->print_on(out, withComments, printRanges); 1453 } 1454 } 1455 FREE_C_HEAP_ARRAY(Flag*, array); 1456 }