globals.cpp revision 7426:0f6100dde08e
1/* 2 * Copyright (c) 1997, 2014, 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 "memory/allocation.inline.hpp" 27#include "oops/oop.inline.hpp" 28#include "runtime/arguments.hpp" 29#include "runtime/globals.hpp" 30#include "runtime/globals_extension.hpp" 31#include "runtime/os.hpp" 32#include "trace/tracing.hpp" 33#include "utilities/ostream.hpp" 34#include "utilities/macros.hpp" 35#include "utilities/top.hpp" 36#if INCLUDE_ALL_GCS 37#include "gc_implementation/g1/g1_globals.hpp" 38#endif // INCLUDE_ALL_GCS 39#ifdef COMPILER1 40#include "c1/c1_globals.hpp" 41#endif 42#ifdef COMPILER2 43#include "opto/c2_globals.hpp" 44#endif 45#ifdef SHARK 46#include "shark/shark_globals.hpp" 47#endif 48 49PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 50 51RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \ 52 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \ 53 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \ 54 MATERIALIZE_NOTPRODUCT_FLAG, \ 55 MATERIALIZE_MANAGEABLE_FLAG, MATERIALIZE_PRODUCT_RW_FLAG, \ 56 MATERIALIZE_LP64_PRODUCT_FLAG) 57 58RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \ 59 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \ 60 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG) 61 62ARCH_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PRODUCT_FLAG, \ 63 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \ 64 MATERIALIZE_NOTPRODUCT_FLAG) 65 66MATERIALIZE_FLAGS_EXT 67 68 69static bool is_product_build() { 70#ifdef PRODUCT 71 return true; 72#else 73 return false; 74#endif 75} 76 77void Flag::check_writable() { 78 if (is_constant_in_binary()) { 79 fatal(err_msg("flag is constant: %s", _name)); 80 } 81} 82 83bool Flag::is_bool() const { 84 return strcmp(_type, "bool") == 0; 85} 86 87bool Flag::get_bool() const { 88 return *((bool*) _addr); 89} 90 91void Flag::set_bool(bool value) { 92 check_writable(); 93 *((bool*) _addr) = value; 94} 95 96bool Flag::is_intx() const { 97 return strcmp(_type, "intx") == 0; 98} 99 100intx Flag::get_intx() const { 101 return *((intx*) _addr); 102} 103 104void Flag::set_intx(intx value) { 105 check_writable(); 106 *((intx*) _addr) = value; 107} 108 109bool Flag::is_uintx() const { 110 return strcmp(_type, "uintx") == 0; 111} 112 113uintx Flag::get_uintx() const { 114 return *((uintx*) _addr); 115} 116 117void Flag::set_uintx(uintx value) { 118 check_writable(); 119 *((uintx*) _addr) = value; 120} 121 122bool Flag::is_uint64_t() const { 123 return strcmp(_type, "uint64_t") == 0; 124} 125 126uint64_t Flag::get_uint64_t() const { 127 return *((uint64_t*) _addr); 128} 129 130void Flag::set_uint64_t(uint64_t value) { 131 check_writable(); 132 *((uint64_t*) _addr) = value; 133} 134 135bool Flag::is_size_t() const { 136 return strcmp(_type, "size_t") == 0; 137} 138 139size_t Flag::get_size_t() const { 140 return *((size_t*) _addr); 141} 142 143void Flag::set_size_t(size_t value) { 144 check_writable(); 145 *((size_t*) _addr) = value; 146} 147 148bool Flag::is_double() const { 149 return strcmp(_type, "double") == 0; 150} 151 152double Flag::get_double() const { 153 return *((double*) _addr); 154} 155 156void Flag::set_double(double value) { 157 check_writable(); 158 *((double*) _addr) = value; 159} 160 161bool Flag::is_ccstr() const { 162 return strcmp(_type, "ccstr") == 0 || strcmp(_type, "ccstrlist") == 0; 163} 164 165bool Flag::ccstr_accumulates() const { 166 return strcmp(_type, "ccstrlist") == 0; 167} 168 169ccstr Flag::get_ccstr() const { 170 return *((ccstr*) _addr); 171} 172 173void Flag::set_ccstr(ccstr value) { 174 check_writable(); 175 *((ccstr*) _addr) = value; 176} 177 178 179Flag::Flags Flag::get_origin() { 180 return Flags(_flags & VALUE_ORIGIN_MASK); 181} 182 183void Flag::set_origin(Flags origin) { 184 assert((origin & VALUE_ORIGIN_MASK) == origin, "sanity"); 185 _flags = Flags((_flags & ~VALUE_ORIGIN_MASK) | origin); 186} 187 188bool Flag::is_default() { 189 return (get_origin() == DEFAULT); 190} 191 192bool Flag::is_ergonomic() { 193 return (get_origin() == ERGONOMIC); 194} 195 196bool Flag::is_command_line() { 197 return (get_origin() == COMMAND_LINE); 198} 199 200bool Flag::is_product() const { 201 return (_flags & KIND_PRODUCT) != 0; 202} 203 204bool Flag::is_manageable() const { 205 return (_flags & KIND_MANAGEABLE) != 0; 206} 207 208bool Flag::is_diagnostic() const { 209 return (_flags & KIND_DIAGNOSTIC) != 0; 210} 211 212bool Flag::is_experimental() const { 213 return (_flags & KIND_EXPERIMENTAL) != 0; 214} 215 216bool Flag::is_notproduct() const { 217 return (_flags & KIND_NOT_PRODUCT) != 0; 218} 219 220bool Flag::is_develop() const { 221 return (_flags & KIND_DEVELOP) != 0; 222} 223 224bool Flag::is_read_write() const { 225 return (_flags & KIND_READ_WRITE) != 0; 226} 227 228bool Flag::is_commercial() const { 229 return (_flags & KIND_COMMERCIAL) != 0; 230} 231 232/** 233 * Returns if this flag is a constant in the binary. Right now this is 234 * true for notproduct and develop flags in product builds. 235 */ 236bool Flag::is_constant_in_binary() const { 237#ifdef PRODUCT 238 return is_notproduct() || is_develop(); 239#else 240 return false; 241#endif 242} 243 244bool Flag::is_unlocker() const { 245 return strcmp(_name, "UnlockDiagnosticVMOptions") == 0 || 246 strcmp(_name, "UnlockExperimentalVMOptions") == 0 || 247 is_unlocker_ext(); 248} 249 250bool Flag::is_unlocked() const { 251 if (is_diagnostic()) { 252 return UnlockDiagnosticVMOptions; 253 } 254 if (is_experimental()) { 255 return UnlockExperimentalVMOptions; 256 } 257 return is_unlocked_ext(); 258} 259 260void Flag::unlock_diagnostic() { 261 assert(is_diagnostic(), "sanity"); 262 _flags = Flags(_flags & ~KIND_DIAGNOSTIC); 263} 264 265// Get custom message for this locked flag, or return NULL if 266// none is available. 267void Flag::get_locked_message(char* buf, int buflen) const { 268 buf[0] = '\0'; 269 if (is_diagnostic() && !is_unlocked()) { 270 jio_snprintf(buf, buflen, "Error: VM option '%s' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.\n", 271 _name); 272 return; 273 } 274 if (is_experimental() && !is_unlocked()) { 275 jio_snprintf(buf, buflen, "Error: VM option '%s' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.\n", 276 _name); 277 return; 278 } 279 if (is_develop() && is_product_build()) { 280 jio_snprintf(buf, buflen, "Error: VM option '%s' is develop and is available only in debug version of VM.\n", 281 _name); 282 return; 283 } 284 if (is_notproduct() && is_product_build()) { 285 jio_snprintf(buf, buflen, "Error: VM option '%s' is notproduct and is available only in debug version of VM.\n", 286 _name); 287 return; 288 } 289 get_locked_message_ext(buf, buflen); 290} 291 292bool Flag::is_writeable() const { 293 return is_manageable() || (is_product() && is_read_write()) || is_writeable_ext(); 294} 295 296// All flags except "manageable" are assumed to be internal flags. 297// Long term, we need to define a mechanism to specify which flags 298// are external/stable and change this function accordingly. 299bool Flag::is_external() const { 300 return is_manageable() || is_external_ext(); 301} 302 303 304// Length of format string (e.g. "%.1234s") for printing ccstr below 305#define FORMAT_BUFFER_LEN 16 306 307PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL 308void Flag::print_on(outputStream* st, bool withComments) { 309 // Don't print notproduct and develop flags in a product build. 310 if (is_constant_in_binary()) { 311 return; 312 } 313 314 st->print("%9s %-40s %c= ", _type, _name, (!is_default() ? ':' : ' ')); 315 316 if (is_bool()) { 317 st->print("%-16s", get_bool() ? "true" : "false"); 318 } 319 if (is_intx()) { 320 st->print("%-16ld", get_intx()); 321 } 322 if (is_uintx()) { 323 st->print("%-16lu", get_uintx()); 324 } 325 if (is_uint64_t()) { 326 st->print("%-16lu", get_uint64_t()); 327 } 328 if (is_size_t()) { 329 st->print(SIZE_FORMAT_W(-16), get_size_t()); 330 } 331 if (is_double()) { 332 st->print("%-16f", get_double()); 333 } 334 if (is_ccstr()) { 335 const char* cp = get_ccstr(); 336 if (cp != NULL) { 337 const char* eol; 338 while ((eol = strchr(cp, '\n')) != NULL) { 339 char format_buffer[FORMAT_BUFFER_LEN]; 340 size_t llen = pointer_delta(eol, cp, sizeof(char)); 341 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN, 342 "%%." SIZE_FORMAT "s", llen); 343PRAGMA_DIAG_PUSH 344PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL 345 st->print(format_buffer, cp); 346PRAGMA_DIAG_POP 347 st->cr(); 348 cp = eol+1; 349 st->print("%5s %-35s += ", "", _name); 350 } 351 st->print("%-16s", cp); 352 } 353 else st->print("%-16s", ""); 354 } 355 356 st->print("%-20s", " "); 357 print_kind(st); 358 359 if (withComments) { 360#ifndef PRODUCT 361 st->print("%s", _doc); 362#endif 363 } 364 st->cr(); 365} 366 367void Flag::print_kind(outputStream* st) { 368 struct Data { 369 int flag; 370 const char* name; 371 }; 372 373 Data data[] = { 374 { KIND_C1, "C1" }, 375 { KIND_C2, "C2" }, 376 { KIND_ARCH, "ARCH" }, 377 { KIND_SHARK, "SHARK" }, 378 { KIND_PLATFORM_DEPENDENT, "pd" }, 379 { KIND_PRODUCT, "product" }, 380 { KIND_MANAGEABLE, "manageable" }, 381 { KIND_DIAGNOSTIC, "diagnostic" }, 382 { KIND_EXPERIMENTAL, "experimental" }, 383 { KIND_COMMERCIAL, "commercial" }, 384 { KIND_NOT_PRODUCT, "notproduct" }, 385 { KIND_DEVELOP, "develop" }, 386 { KIND_LP64_PRODUCT, "lp64_product" }, 387 { KIND_READ_WRITE, "rw" }, 388 { -1, "" } 389 }; 390 391 if ((_flags & KIND_MASK) != 0) { 392 st->print("{"); 393 bool is_first = true; 394 395 for (int i = 0; data[i].flag != -1; i++) { 396 Data d = data[i]; 397 if ((_flags & d.flag) != 0) { 398 if (is_first) { 399 is_first = false; 400 } else { 401 st->print(" "); 402 } 403 st->print("%s", d.name); 404 } 405 } 406 407 st->print("}"); 408 } 409} 410 411void Flag::print_as_flag(outputStream* st) { 412 if (is_bool()) { 413 st->print("-XX:%s%s", get_bool() ? "+" : "-", _name); 414 } else if (is_intx()) { 415 st->print("-XX:%s=" INTX_FORMAT, _name, get_intx()); 416 } else if (is_uintx()) { 417 st->print("-XX:%s=" UINTX_FORMAT, _name, get_uintx()); 418 } else if (is_uint64_t()) { 419 st->print("-XX:%s=" UINT64_FORMAT, _name, get_uint64_t()); 420 } else if (is_size_t()) { 421 st->print("-XX:%s=" SIZE_FORMAT, _name, get_size_t()); 422 } else if (is_double()) { 423 st->print("-XX:%s=%f", _name, get_double()); 424 } else if (is_ccstr()) { 425 st->print("-XX:%s=", _name); 426 const char* cp = get_ccstr(); 427 if (cp != NULL) { 428 // Need to turn embedded '\n's back into separate arguments 429 // Not so efficient to print one character at a time, 430 // but the choice is to do the transformation to a buffer 431 // and print that. And this need not be efficient. 432 for (; *cp != '\0'; cp += 1) { 433 switch (*cp) { 434 default: 435 st->print("%c", *cp); 436 break; 437 case '\n': 438 st->print(" -XX:%s=", _name); 439 break; 440 } 441 } 442 } 443 } else { 444 ShouldNotReachHere(); 445 } 446} 447 448// 4991491 do not "optimize out" the was_set false values: omitting them 449// tickles a Microsoft compiler bug causing flagTable to be malformed 450 451#define NAME(name) NOT_PRODUCT(&name) PRODUCT_ONLY(&CONST_##name) 452 453#define RUNTIME_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT) }, 454#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) }, 455#define RUNTIME_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DIAGNOSTIC) }, 456#define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_EXPERIMENTAL) }, 457#define RUNTIME_MANAGEABLE_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_MANAGEABLE) }, 458#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) }, 459#define RUNTIME_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DEVELOP) }, 460#define RUNTIME_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) }, 461#define RUNTIME_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_NOT_PRODUCT) }, 462 463#ifdef _LP64 464#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) }, 465#else 466#define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */ 467#endif // _LP64 468 469#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) }, 470#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) }, 471#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) }, 472#define C1_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DEVELOP) }, 473#define C1_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) }, 474#define C1_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_NOT_PRODUCT) }, 475 476#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) }, 477#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) }, 478#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) }, 479#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) }, 480#define C2_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP) }, 481#define C2_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) }, 482#define C2_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_NOT_PRODUCT) }, 483 484#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) }, 485#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) }, 486#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) }, 487#define ARCH_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DEVELOP) }, 488#define ARCH_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_NOT_PRODUCT) }, 489 490#define SHARK_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_PRODUCT) }, 491#define SHARK_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) }, 492#define SHARK_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DIAGNOSTIC) }, 493#define SHARK_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DEVELOP) }, 494#define SHARK_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) }, 495#define SHARK_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_NOT_PRODUCT) }, 496 497static Flag flagTable[] = { 498 RUNTIME_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_EXPERIMENTAL_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT, RUNTIME_MANAGEABLE_FLAG_STRUCT, RUNTIME_PRODUCT_RW_FLAG_STRUCT, RUNTIME_LP64_PRODUCT_FLAG_STRUCT) 499 RUNTIME_OS_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT) 500#if INCLUDE_ALL_GCS 501 G1_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_EXPERIMENTAL_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT, RUNTIME_MANAGEABLE_FLAG_STRUCT, RUNTIME_PRODUCT_RW_FLAG_STRUCT) 502#endif // INCLUDE_ALL_GCS 503#ifdef COMPILER1 504 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_DIAGNOSTIC_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT) 505#endif 506#ifdef COMPILER2 507 C2_FLAGS(C2_DEVELOP_FLAG_STRUCT, C2_PD_DEVELOP_FLAG_STRUCT, C2_PRODUCT_FLAG_STRUCT, C2_PD_PRODUCT_FLAG_STRUCT, C2_DIAGNOSTIC_FLAG_STRUCT, C2_EXPERIMENTAL_FLAG_STRUCT, C2_NOTPRODUCT_FLAG_STRUCT) 508#endif 509#ifdef SHARK 510 SHARK_FLAGS(SHARK_DEVELOP_FLAG_STRUCT, SHARK_PD_DEVELOP_FLAG_STRUCT, SHARK_PRODUCT_FLAG_STRUCT, SHARK_PD_PRODUCT_FLAG_STRUCT, SHARK_DIAGNOSTIC_FLAG_STRUCT, SHARK_NOTPRODUCT_FLAG_STRUCT) 511#endif 512 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, ARCH_PRODUCT_FLAG_STRUCT, ARCH_DIAGNOSTIC_FLAG_STRUCT, ARCH_EXPERIMENTAL_FLAG_STRUCT, ARCH_NOTPRODUCT_FLAG_STRUCT) 513 FLAGTABLE_EXT 514 {0, NULL, NULL} 515}; 516 517Flag* Flag::flags = flagTable; 518size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag)); 519 520inline bool str_equal(const char* s, const char* q, size_t len) { 521 // s is null terminated, q is not! 522 if (strlen(s) != (unsigned int) len) return false; 523 return strncmp(s, q, len) == 0; 524} 525 526// Search the flag table for a named flag 527Flag* Flag::find_flag(const char* name, size_t length, bool allow_locked, bool return_flag) { 528 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) { 529 if (str_equal(current->_name, name, length)) { 530 // Found a matching entry. 531 // Don't report notproduct and develop flags in product builds. 532 if (current->is_constant_in_binary()) { 533 return (return_flag == true ? current : NULL); 534 } 535 // Report locked flags only if allowed. 536 if (!(current->is_unlocked() || current->is_unlocker())) { 537 if (!allow_locked) { 538 // disable use of locked flags, e.g. diagnostic, experimental, 539 // commercial... until they are explicitly unlocked 540 return NULL; 541 } 542 } 543 return current; 544 } 545 } 546 // Flag name is not in the flag table 547 return NULL; 548} 549 550// Compute string similarity based on Dice's coefficient 551static float str_similar(const char* str1, const char* str2, size_t len2) { 552 int len1 = (int) strlen(str1); 553 int total = len1 + (int) len2; 554 555 int hit = 0; 556 557 for (int i = 0; i < len1 -1; ++i) { 558 for (int j = 0; j < (int) len2 -1; ++j) { 559 if ((str1[i] == str2[j]) && (str1[i+1] == str2[j+1])) { 560 ++hit; 561 break; 562 } 563 } 564 } 565 566 return 2.0f * (float) hit / (float) total; 567} 568 569Flag* Flag::fuzzy_match(const char* name, size_t length, bool allow_locked) { 570 float VMOptionsFuzzyMatchSimilarity = 0.7f; 571 Flag* match = NULL; 572 float score; 573 float max_score = -1; 574 575 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) { 576 score = str_similar(current->_name, name, length); 577 if (score > max_score) { 578 max_score = score; 579 match = current; 580 } 581 } 582 583 if (!(match->is_unlocked() || match->is_unlocker())) { 584 if (!allow_locked) { 585 return NULL; 586 } 587 } 588 589 if (max_score < VMOptionsFuzzyMatchSimilarity) { 590 return NULL; 591 } 592 593 return match; 594} 595 596// Returns the address of the index'th element 597static Flag* address_of_flag(CommandLineFlagWithType flag) { 598 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); 599 return &Flag::flags[flag]; 600} 601 602bool CommandLineFlagsEx::is_default(CommandLineFlag flag) { 603 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); 604 Flag* f = &Flag::flags[flag]; 605 return f->is_default(); 606} 607 608bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) { 609 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); 610 Flag* f = &Flag::flags[flag]; 611 return f->is_ergonomic(); 612} 613 614bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) { 615 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); 616 Flag* f = &Flag::flags[flag]; 617 return f->is_command_line(); 618} 619 620bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) { 621 Flag* result = Flag::find_flag((char*)name, strlen(name)); 622 if (result == NULL) return false; 623 *value = result->is_command_line(); 624 return true; 625} 626 627template<class E, class T> 628static void trace_flag_changed(const char* name, const T old_value, const T new_value, const Flag::Flags origin) 629{ 630 E e; 631 e.set_name(name); 632 e.set_old_value(old_value); 633 e.set_new_value(new_value); 634 e.set_origin(origin); 635 e.commit(); 636} 637 638bool CommandLineFlags::boolAt(const char* name, size_t len, bool* value, bool allow_locked, bool return_flag) { 639 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 640 if (result == NULL) return false; 641 if (!result->is_bool()) return false; 642 *value = result->get_bool(); 643 return true; 644} 645 646bool CommandLineFlags::boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin) { 647 Flag* result = Flag::find_flag(name, len); 648 if (result == NULL) return false; 649 if (!result->is_bool()) return false; 650 bool old_value = result->get_bool(); 651 trace_flag_changed<EventBooleanFlagChanged, bool>(name, old_value, *value, origin); 652 result->set_bool(*value); 653 *value = old_value; 654 result->set_origin(origin); 655 return true; 656} 657 658void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, Flag::Flags origin) { 659 Flag* faddr = address_of_flag(flag); 660 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type"); 661 trace_flag_changed<EventBooleanFlagChanged, bool>(faddr->_name, faddr->get_bool(), value, origin); 662 faddr->set_bool(value); 663 faddr->set_origin(origin); 664} 665 666bool CommandLineFlags::intxAt(const char* name, size_t len, intx* value, bool allow_locked, bool return_flag) { 667 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 668 if (result == NULL) return false; 669 if (!result->is_intx()) return false; 670 *value = result->get_intx(); 671 return true; 672} 673 674bool CommandLineFlags::intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin) { 675 Flag* result = Flag::find_flag(name, len); 676 if (result == NULL) return false; 677 if (!result->is_intx()) return false; 678 intx old_value = result->get_intx(); 679 trace_flag_changed<EventLongFlagChanged, s8>(name, old_value, *value, origin); 680 result->set_intx(*value); 681 *value = old_value; 682 result->set_origin(origin); 683 return true; 684} 685 686void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, Flag::Flags origin) { 687 Flag* faddr = address_of_flag(flag); 688 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type"); 689 trace_flag_changed<EventLongFlagChanged, s8>(faddr->_name, faddr->get_intx(), value, origin); 690 faddr->set_intx(value); 691 faddr->set_origin(origin); 692} 693 694bool CommandLineFlags::uintxAt(const char* name, size_t len, uintx* value, bool allow_locked, bool return_flag) { 695 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 696 if (result == NULL) return false; 697 if (!result->is_uintx()) return false; 698 *value = result->get_uintx(); 699 return true; 700} 701 702bool CommandLineFlags::uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin) { 703 Flag* result = Flag::find_flag(name, len); 704 if (result == NULL) return false; 705 if (!result->is_uintx()) return false; 706 uintx old_value = result->get_uintx(); 707 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin); 708 result->set_uintx(*value); 709 *value = old_value; 710 result->set_origin(origin); 711 return true; 712} 713 714void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, Flag::Flags origin) { 715 Flag* faddr = address_of_flag(flag); 716 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type"); 717 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_uintx(), value, origin); 718 faddr->set_uintx(value); 719 faddr->set_origin(origin); 720} 721 722bool CommandLineFlags::uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked, bool return_flag) { 723 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 724 if (result == NULL) return false; 725 if (!result->is_uint64_t()) return false; 726 *value = result->get_uint64_t(); 727 return true; 728} 729 730bool CommandLineFlags::uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin) { 731 Flag* result = Flag::find_flag(name, len); 732 if (result == NULL) return false; 733 if (!result->is_uint64_t()) return false; 734 uint64_t old_value = result->get_uint64_t(); 735 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin); 736 result->set_uint64_t(*value); 737 *value = old_value; 738 result->set_origin(origin); 739 return true; 740} 741 742void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, Flag::Flags origin) { 743 Flag* faddr = address_of_flag(flag); 744 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type"); 745 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_uint64_t(), value, origin); 746 faddr->set_uint64_t(value); 747 faddr->set_origin(origin); 748} 749 750bool CommandLineFlags::size_tAt(const char* name, size_t len, size_t* value, bool allow_locked, bool return_flag) { 751 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 752 if (result == NULL) return false; 753 if (!result->is_size_t()) return false; 754 *value = result->get_size_t(); 755 return true; 756} 757 758bool CommandLineFlags::size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin) { 759 Flag* result = Flag::find_flag(name, len); 760 if (result == NULL) return false; 761 if (!result->is_size_t()) return false; 762 size_t old_value = result->get_size_t(); 763 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin); 764 result->set_size_t(*value); 765 *value = old_value; 766 result->set_origin(origin); 767 return true; 768} 769 770void CommandLineFlagsEx::size_tAtPut(CommandLineFlagWithType flag, size_t value, Flag::Flags origin) { 771 Flag* faddr = address_of_flag(flag); 772 guarantee(faddr != NULL && faddr->is_size_t(), "wrong flag type"); 773 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_size_t(), value, origin); 774 faddr->set_size_t(value); 775 faddr->set_origin(origin); 776} 777 778bool CommandLineFlags::doubleAt(const char* name, size_t len, double* value, bool allow_locked, bool return_flag) { 779 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 780 if (result == NULL) return false; 781 if (!result->is_double()) return false; 782 *value = result->get_double(); 783 return true; 784} 785 786bool CommandLineFlags::doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin) { 787 Flag* result = Flag::find_flag(name, len); 788 if (result == NULL) return false; 789 if (!result->is_double()) return false; 790 double old_value = result->get_double(); 791 trace_flag_changed<EventDoubleFlagChanged, double>(name, old_value, *value, origin); 792 result->set_double(*value); 793 *value = old_value; 794 result->set_origin(origin); 795 return true; 796} 797 798void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, Flag::Flags origin) { 799 Flag* faddr = address_of_flag(flag); 800 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type"); 801 trace_flag_changed<EventDoubleFlagChanged, double>(faddr->_name, faddr->get_double(), value, origin); 802 faddr->set_double(value); 803 faddr->set_origin(origin); 804} 805 806bool CommandLineFlags::ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked, bool return_flag) { 807 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag); 808 if (result == NULL) return false; 809 if (!result->is_ccstr()) return false; 810 *value = result->get_ccstr(); 811 return true; 812} 813 814bool CommandLineFlags::ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin) { 815 Flag* result = Flag::find_flag(name, len); 816 if (result == NULL) return false; 817 if (!result->is_ccstr()) return false; 818 ccstr old_value = result->get_ccstr(); 819 trace_flag_changed<EventStringFlagChanged, const char*>(name, old_value, *value, origin); 820 char* new_value = NULL; 821 if (*value != NULL) { 822 new_value = os::strdup_check_oom(*value); 823 } 824 result->set_ccstr(new_value); 825 if (result->is_default() && old_value != NULL) { 826 // Prior value is NOT heap allocated, but was a literal constant. 827 old_value = os::strdup_check_oom(old_value); 828 } 829 *value = old_value; 830 result->set_origin(origin); 831 return true; 832} 833 834void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, Flag::Flags origin) { 835 Flag* faddr = address_of_flag(flag); 836 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type"); 837 ccstr old_value = faddr->get_ccstr(); 838 trace_flag_changed<EventStringFlagChanged, const char*>(faddr->_name, old_value, value, origin); 839 char* new_value = os::strdup_check_oom(value); 840 faddr->set_ccstr(new_value); 841 if (!faddr->is_default() && old_value != NULL) { 842 // Prior value is heap allocated so free it. 843 FREE_C_HEAP_ARRAY(char, old_value, mtInternal); 844 } 845 faddr->set_origin(origin); 846} 847 848extern "C" { 849 static int compare_flags(const void* void_a, const void* void_b) { 850 return strcmp((*((Flag**) void_a))->_name, (*((Flag**) void_b))->_name); 851 } 852} 853 854void CommandLineFlags::printSetFlags(outputStream* out) { 855 // Print which flags were set on the command line 856 // note: this method is called before the thread structure is in place 857 // which means resource allocation cannot be used. 858 859 // The last entry is the null entry. 860 const size_t length = Flag::numFlags - 1; 861 862 // Sort 863 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal); 864 for (size_t i = 0; i < length; i++) { 865 array[i] = &flagTable[i]; 866 } 867 qsort(array, length, sizeof(Flag*), compare_flags); 868 869 // Print 870 for (size_t i = 0; i < length; i++) { 871 if (array[i]->get_origin() /* naked field! */) { 872 array[i]->print_as_flag(out); 873 out->print(" "); 874 } 875 } 876 out->cr(); 877 FREE_C_HEAP_ARRAY(Flag*, array, mtInternal); 878} 879 880#ifndef PRODUCT 881 882 883void CommandLineFlags::verify() { 884 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict"); 885} 886 887#endif // PRODUCT 888 889void CommandLineFlags::printFlags(outputStream* out, bool withComments) { 890 // Print the flags sorted by name 891 // note: this method is called before the thread structure is in place 892 // which means resource allocation cannot be used. 893 894 // The last entry is the null entry. 895 const size_t length = Flag::numFlags - 1; 896 897 // Sort 898 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal); 899 for (size_t i = 0; i < length; i++) { 900 array[i] = &flagTable[i]; 901 } 902 qsort(array, length, sizeof(Flag*), compare_flags); 903 904 // Print 905 out->print_cr("[Global flags]"); 906 for (size_t i = 0; i < length; i++) { 907 if (array[i]->is_unlocked()) { 908 array[i]->print_on(out, withComments); 909 } 910 } 911 FREE_C_HEAP_ARRAY(Flag*, array, mtInternal); 912} 913