arguments.cpp revision 7344:1d29b13e8a51
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 "classfile/classLoader.hpp" 27#include "classfile/javaAssertions.hpp" 28#include "classfile/stringTable.hpp" 29#include "classfile/symbolTable.hpp" 30#include "compiler/compilerOracle.hpp" 31#include "memory/allocation.inline.hpp" 32#include "memory/cardTableRS.hpp" 33#include "memory/genCollectedHeap.hpp" 34#include "memory/referenceProcessor.hpp" 35#include "memory/universe.inline.hpp" 36#include "oops/oop.inline.hpp" 37#include "prims/jvmtiExport.hpp" 38#include "runtime/arguments.hpp" 39#include "runtime/arguments_ext.hpp" 40#include "runtime/globals_extension.hpp" 41#include "runtime/java.hpp" 42#include "runtime/os.hpp" 43#include "runtime/vm_version.hpp" 44#include "services/management.hpp" 45#include "services/memTracker.hpp" 46#include "utilities/defaultStream.hpp" 47#include "utilities/macros.hpp" 48#include "utilities/stringUtils.hpp" 49#include "utilities/taskqueue.hpp" 50#if INCLUDE_ALL_GCS 51#include "gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp" 52#include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 53#include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" 54#endif // INCLUDE_ALL_GCS 55 56// Note: This is a special bug reporting site for the JVM 57#define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp" 58#define DEFAULT_JAVA_LAUNCHER "generic" 59 60// Disable options not supported in this release, with a warning if they 61// were explicitly requested on the command-line 62#define UNSUPPORTED_OPTION(opt, description) \ 63do { \ 64 if (opt) { \ 65 if (FLAG_IS_CMDLINE(opt)) { \ 66 warning(description " is disabled in this release."); \ 67 } \ 68 FLAG_SET_DEFAULT(opt, false); \ 69 } \ 70} while(0) 71 72#define UNSUPPORTED_GC_OPTION(gc) \ 73do { \ 74 if (gc) { \ 75 if (FLAG_IS_CMDLINE(gc)) { \ 76 warning(#gc " is not supported in this VM. Using Serial GC."); \ 77 } \ 78 FLAG_SET_DEFAULT(gc, false); \ 79 } \ 80} while(0) 81 82char** Arguments::_jvm_flags_array = NULL; 83int Arguments::_num_jvm_flags = 0; 84char** Arguments::_jvm_args_array = NULL; 85int Arguments::_num_jvm_args = 0; 86char* Arguments::_java_command = NULL; 87SystemProperty* Arguments::_system_properties = NULL; 88const char* Arguments::_gc_log_filename = NULL; 89bool Arguments::_has_profile = false; 90size_t Arguments::_conservative_max_heap_alignment = 0; 91uintx Arguments::_min_heap_size = 0; 92uintx Arguments::_min_heap_free_ratio = 0; 93uintx Arguments::_max_heap_free_ratio = 0; 94Arguments::Mode Arguments::_mode = _mixed; 95bool Arguments::_java_compiler = false; 96bool Arguments::_xdebug_mode = false; 97const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; 98const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; 99int Arguments::_sun_java_launcher_pid = -1; 100bool Arguments::_sun_java_launcher_is_altjvm = false; 101 102// These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*) 103bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 104bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; 105bool Arguments::_BackgroundCompilation = BackgroundCompilation; 106bool Arguments::_ClipInlining = ClipInlining; 107 108char* Arguments::SharedArchivePath = NULL; 109 110AgentLibraryList Arguments::_libraryList; 111AgentLibraryList Arguments::_agentList; 112 113abort_hook_t Arguments::_abort_hook = NULL; 114exit_hook_t Arguments::_exit_hook = NULL; 115vfprintf_hook_t Arguments::_vfprintf_hook = NULL; 116 117 118SystemProperty *Arguments::_sun_boot_library_path = NULL; 119SystemProperty *Arguments::_java_library_path = NULL; 120SystemProperty *Arguments::_java_home = NULL; 121SystemProperty *Arguments::_java_class_path = NULL; 122SystemProperty *Arguments::_sun_boot_class_path = NULL; 123 124char* Arguments::_meta_index_path = NULL; 125char* Arguments::_meta_index_dir = NULL; 126char* Arguments::_ext_dirs = NULL; 127 128// Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string 129 130static bool match_option(const JavaVMOption *option, const char* name, 131 const char** tail) { 132 int len = (int)strlen(name); 133 if (strncmp(option->optionString, name, len) == 0) { 134 *tail = option->optionString + len; 135 return true; 136 } else { 137 return false; 138 } 139} 140 141static void logOption(const char* opt) { 142 if (PrintVMOptions) { 143 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); 144 } 145} 146 147// Process java launcher properties. 148void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { 149 // See if sun.java.launcher, sun.java.launcher.is_altjvm or 150 // sun.java.launcher.pid is defined. 151 // Must do this before setting up other system properties, 152 // as some of them may depend on launcher type. 153 for (int index = 0; index < args->nOptions; index++) { 154 const JavaVMOption* option = args->options + index; 155 const char* tail; 156 157 if (match_option(option, "-Dsun.java.launcher=", &tail)) { 158 process_java_launcher_argument(tail, option->extraInfo); 159 continue; 160 } 161 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) { 162 if (strcmp(tail, "true") == 0) { 163 _sun_java_launcher_is_altjvm = true; 164 } 165 continue; 166 } 167 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { 168 _sun_java_launcher_pid = atoi(tail); 169 continue; 170 } 171 } 172} 173 174// Initialize system properties key and value. 175void Arguments::init_system_properties() { 176 177 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", 178 "Java Virtual Machine Specification", false)); 179 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); 180 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); 181 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); 182 183 // Following are JVMTI agent writable properties. 184 // Properties values are set to NULL and they are 185 // os specific they are initialized in os::init_system_properties_values(). 186 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); 187 _java_library_path = new SystemProperty("java.library.path", NULL, true); 188 _java_home = new SystemProperty("java.home", NULL, true); 189 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true); 190 191 _java_class_path = new SystemProperty("java.class.path", "", true); 192 193 // Add to System Property list. 194 PropertyList_add(&_system_properties, _sun_boot_library_path); 195 PropertyList_add(&_system_properties, _java_library_path); 196 PropertyList_add(&_system_properties, _java_home); 197 PropertyList_add(&_system_properties, _java_class_path); 198 PropertyList_add(&_system_properties, _sun_boot_class_path); 199 200 // Set OS specific system properties values 201 os::init_system_properties_values(); 202} 203 204 205 // Update/Initialize System properties after JDK version number is known 206void Arguments::init_version_specific_system_properties() { 207 enum { bufsz = 16 }; 208 char buffer[bufsz]; 209 const char* spec_vendor = "Sun Microsystems Inc."; 210 uint32_t spec_version = 0; 211 212 spec_vendor = "Oracle Corporation"; 213 spec_version = JDK_Version::current().major_version(); 214 jio_snprintf(buffer, bufsz, "1." UINT32_FORMAT, spec_version); 215 216 PropertyList_add(&_system_properties, 217 new SystemProperty("java.vm.specification.vendor", spec_vendor, false)); 218 PropertyList_add(&_system_properties, 219 new SystemProperty("java.vm.specification.version", buffer, false)); 220 PropertyList_add(&_system_properties, 221 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); 222} 223 224/** 225 * Provide a slightly more user-friendly way of eliminating -XX flags. 226 * When a flag is eliminated, it can be added to this list in order to 227 * continue accepting this flag on the command-line, while issuing a warning 228 * and ignoring the value. Once the JDK version reaches the 'accept_until' 229 * limit, we flatly refuse to admit the existence of the flag. This allows 230 * a flag to die correctly over JDK releases using HSX. 231 */ 232typedef struct { 233 const char* name; 234 JDK_Version obsoleted_in; // when the flag went away 235 JDK_Version accept_until; // which version to start denying the existence 236} ObsoleteFlag; 237 238static ObsoleteFlag obsolete_jvm_flags[] = { 239 { "UseTrainGC", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 240 { "UseSpecialLargeObjectHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 241 { "UseOversizedCarHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 242 { "TraceCarAllocation", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 243 { "PrintTrainGCProcessingStats", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 244 { "LogOfCarSpaceSize", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 245 { "OversizedCarThreshold", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 246 { "MinTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 247 { "DefaultTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 248 { "MaxTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 249 { "DelayTickAdjustment", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 250 { "ProcessingToTenuringRatio", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 251 { "MinTrainLength", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 252 { "AppendRatio", JDK_Version::jdk_update(6,10), JDK_Version::jdk(7) }, 253 { "DefaultMaxRAM", JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, 254 { "DefaultInitialRAMFraction", 255 JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, 256 { "UseDepthFirstScavengeOrder", 257 JDK_Version::jdk_update(6,22), JDK_Version::jdk(7) }, 258 { "HandlePromotionFailure", 259 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) }, 260 { "MaxLiveObjectEvacuationRatio", 261 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) }, 262 { "ForceSharedSpaces", JDK_Version::jdk_update(6,25), JDK_Version::jdk(8) }, 263 { "UseParallelOldGCCompacting", 264 JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) }, 265 { "UseParallelDensePrefixUpdate", 266 JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) }, 267 { "UseParallelOldGCDensePrefix", 268 JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) }, 269 { "AllowTransitionalJSR292", JDK_Version::jdk(7), JDK_Version::jdk(8) }, 270 { "UseCompressedStrings", JDK_Version::jdk(7), JDK_Version::jdk(8) }, 271 { "CMSPermGenPrecleaningEnabled", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 272 { "CMSTriggerPermRatio", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 273 { "CMSInitiatingPermOccupancyFraction", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 274 { "AdaptivePermSizeWeight", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 275 { "PermGenPadding", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 276 { "PermMarkSweepDeadRatio", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 277 { "PermSize", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 278 { "MaxPermSize", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 279 { "MinPermHeapExpansion", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 280 { "MaxPermHeapExpansion", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 281 { "CMSRevisitStackSize", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 282 { "PrintRevisitStats", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 283 { "UseVectoredExceptions", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 284 { "UseSplitVerifier", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 285 { "UseISM", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 286 { "UsePermISM", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 287 { "UseMPSS", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 288 { "UseStringCache", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 289 { "UseOldInlining", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 290 { "SafepointPollOffset", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 291#ifdef PRODUCT 292 { "DesiredMethodLimit", 293 JDK_Version::jdk_update(7, 2), JDK_Version::jdk(8) }, 294#endif // PRODUCT 295 { "UseVMInterruptibleIO", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 296 { "UseBoundThreads", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 297 { "DefaultThreadPriority", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 298 { "NoYieldsInMicrolock", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 299 { "BackEdgeThreshold", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 300 { "UseNewReflection", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 301 { "ReflectionWrapResolutionErrors",JDK_Version::jdk(9), JDK_Version::jdk(10) }, 302 { "VerifyReflectionBytecodes", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 303 { "AutoShutdownNMT", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 304 { "NmethodSweepFraction", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 305 { "NmethodSweepCheckInterval", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 306 { "CodeCacheMinimumFreeSpace", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 307#ifndef ZERO 308 { "UseFastAccessorMethods", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 309 { "UseFastEmptyMethods", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 310#endif // ZERO 311 { NULL, JDK_Version(0), JDK_Version(0) } 312}; 313 314// Returns true if the flag is obsolete and fits into the range specified 315// for being ignored. In the case that the flag is ignored, the 'version' 316// value is filled in with the version number when the flag became 317// obsolete so that that value can be displayed to the user. 318bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) { 319 int i = 0; 320 assert(version != NULL, "Must provide a version buffer"); 321 while (obsolete_jvm_flags[i].name != NULL) { 322 const ObsoleteFlag& flag_status = obsolete_jvm_flags[i]; 323 // <flag>=xxx form 324 // [-|+]<flag> form 325 if ((strncmp(flag_status.name, s, strlen(flag_status.name)) == 0) || 326 ((s[0] == '+' || s[0] == '-') && 327 (strncmp(flag_status.name, &s[1], strlen(flag_status.name)) == 0))) { 328 if (JDK_Version::current().compare(flag_status.accept_until) == -1) { 329 *version = flag_status.obsoleted_in; 330 return true; 331 } 332 } 333 i++; 334 } 335 return false; 336} 337 338// Constructs the system class path (aka boot class path) from the following 339// components, in order: 340// 341// prefix // from -Xbootclasspath/p:... 342// base // from os::get_system_properties() or -Xbootclasspath= 343// suffix // from -Xbootclasspath/a:... 344// 345// This could be AllStatic, but it isn't needed after argument processing is 346// complete. 347class SysClassPath: public StackObj { 348public: 349 SysClassPath(const char* base); 350 ~SysClassPath(); 351 352 inline void set_base(const char* base); 353 inline void add_prefix(const char* prefix); 354 inline void add_suffix_to_prefix(const char* suffix); 355 inline void add_suffix(const char* suffix); 356 inline void reset_path(const char* base); 357 358 inline const char* get_base() const { return _items[_scp_base]; } 359 inline const char* get_prefix() const { return _items[_scp_prefix]; } 360 inline const char* get_suffix() const { return _items[_scp_suffix]; } 361 362 // Combine all the components into a single c-heap-allocated string; caller 363 // must free the string if/when no longer needed. 364 char* combined_path(); 365 366private: 367 // Utility routines. 368 static char* add_to_path(const char* path, const char* str, bool prepend); 369 static char* add_jars_to_path(char* path, const char* directory); 370 371 inline void reset_item_at(int index); 372 373 // Array indices for the items that make up the sysclasspath. All except the 374 // base are allocated in the C heap and freed by this class. 375 enum { 376 _scp_prefix, // from -Xbootclasspath/p:... 377 _scp_base, // the default sysclasspath 378 _scp_suffix, // from -Xbootclasspath/a:... 379 _scp_nitems // the number of items, must be last. 380 }; 381 382 const char* _items[_scp_nitems]; 383}; 384 385SysClassPath::SysClassPath(const char* base) { 386 memset(_items, 0, sizeof(_items)); 387 _items[_scp_base] = base; 388} 389 390SysClassPath::~SysClassPath() { 391 // Free everything except the base. 392 for (int i = 0; i < _scp_nitems; ++i) { 393 if (i != _scp_base) reset_item_at(i); 394 } 395} 396 397inline void SysClassPath::set_base(const char* base) { 398 _items[_scp_base] = base; 399} 400 401inline void SysClassPath::add_prefix(const char* prefix) { 402 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); 403} 404 405inline void SysClassPath::add_suffix_to_prefix(const char* suffix) { 406 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false); 407} 408 409inline void SysClassPath::add_suffix(const char* suffix) { 410 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); 411} 412 413inline void SysClassPath::reset_item_at(int index) { 414 assert(index < _scp_nitems && index != _scp_base, "just checking"); 415 if (_items[index] != NULL) { 416 FREE_C_HEAP_ARRAY(char, _items[index], mtInternal); 417 _items[index] = NULL; 418 } 419} 420 421inline void SysClassPath::reset_path(const char* base) { 422 // Clear the prefix and suffix. 423 reset_item_at(_scp_prefix); 424 reset_item_at(_scp_suffix); 425 set_base(base); 426} 427 428//------------------------------------------------------------------------------ 429 430 431// Combine the bootclasspath elements, some of which may be null, into a single 432// c-heap-allocated string. 433char* SysClassPath::combined_path() { 434 assert(_items[_scp_base] != NULL, "empty default sysclasspath"); 435 436 size_t lengths[_scp_nitems]; 437 size_t total_len = 0; 438 439 const char separator = *os::path_separator(); 440 441 // Get the lengths. 442 int i; 443 for (i = 0; i < _scp_nitems; ++i) { 444 if (_items[i] != NULL) { 445 lengths[i] = strlen(_items[i]); 446 // Include space for the separator char (or a NULL for the last item). 447 total_len += lengths[i] + 1; 448 } 449 } 450 assert(total_len > 0, "empty sysclasspath not allowed"); 451 452 // Copy the _items to a single string. 453 char* cp = NEW_C_HEAP_ARRAY(char, total_len, mtInternal); 454 char* cp_tmp = cp; 455 for (i = 0; i < _scp_nitems; ++i) { 456 if (_items[i] != NULL) { 457 memcpy(cp_tmp, _items[i], lengths[i]); 458 cp_tmp += lengths[i]; 459 *cp_tmp++ = separator; 460 } 461 } 462 *--cp_tmp = '\0'; // Replace the extra separator. 463 return cp; 464} 465 466// Note: path must be c-heap-allocated (or NULL); it is freed if non-null. 467char* 468SysClassPath::add_to_path(const char* path, const char* str, bool prepend) { 469 char *cp; 470 471 assert(str != NULL, "just checking"); 472 if (path == NULL) { 473 size_t len = strlen(str) + 1; 474 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal); 475 memcpy(cp, str, len); // copy the trailing null 476 } else { 477 const char separator = *os::path_separator(); 478 size_t old_len = strlen(path); 479 size_t str_len = strlen(str); 480 size_t len = old_len + str_len + 2; 481 482 if (prepend) { 483 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal); 484 char* cp_tmp = cp; 485 memcpy(cp_tmp, str, str_len); 486 cp_tmp += str_len; 487 *cp_tmp = separator; 488 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null 489 FREE_C_HEAP_ARRAY(char, path, mtInternal); 490 } else { 491 cp = REALLOC_C_HEAP_ARRAY(char, path, len, mtInternal); 492 char* cp_tmp = cp + old_len; 493 *cp_tmp = separator; 494 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null 495 } 496 } 497 return cp; 498} 499 500// Scan the directory and append any jar or zip files found to path. 501// Note: path must be c-heap-allocated (or NULL); it is freed if non-null. 502char* SysClassPath::add_jars_to_path(char* path, const char* directory) { 503 DIR* dir = os::opendir(directory); 504 if (dir == NULL) return path; 505 506 char dir_sep[2] = { '\0', '\0' }; 507 size_t directory_len = strlen(directory); 508 const char fileSep = *os::file_separator(); 509 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; 510 511 /* Scan the directory for jars/zips, appending them to path. */ 512 struct dirent *entry; 513 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal); 514 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { 515 const char* name = entry->d_name; 516 const char* ext = name + strlen(name) - 4; 517 bool isJarOrZip = ext > name && 518 (os::file_name_strcmp(ext, ".jar") == 0 || 519 os::file_name_strcmp(ext, ".zip") == 0); 520 if (isJarOrZip) { 521 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name), mtInternal); 522 sprintf(jarpath, "%s%s%s", directory, dir_sep, name); 523 path = add_to_path(path, jarpath, false); 524 FREE_C_HEAP_ARRAY(char, jarpath, mtInternal); 525 } 526 } 527 FREE_C_HEAP_ARRAY(char, dbuf, mtInternal); 528 os::closedir(dir); 529 return path; 530} 531 532// Parses a memory size specification string. 533static bool atomull(const char *s, julong* result) { 534 julong n = 0; 535 int args_read = 0; 536 bool is_hex = false; 537 // Skip leading 0[xX] for hexadecimal 538 if (*s =='0' && (*(s+1) == 'x' || *(s+1) == 'X')) { 539 s += 2; 540 is_hex = true; 541 args_read = sscanf(s, JULONG_FORMAT_X, &n); 542 } else { 543 args_read = sscanf(s, JULONG_FORMAT, &n); 544 } 545 if (args_read != 1) { 546 return false; 547 } 548 while (*s != '\0' && (isdigit(*s) || (is_hex && isxdigit(*s)))) { 549 s++; 550 } 551 // 4705540: illegal if more characters are found after the first non-digit 552 if (strlen(s) > 1) { 553 return false; 554 } 555 switch (*s) { 556 case 'T': case 't': 557 *result = n * G * K; 558 // Check for overflow. 559 if (*result/((julong)G * K) != n) return false; 560 return true; 561 case 'G': case 'g': 562 *result = n * G; 563 if (*result/G != n) return false; 564 return true; 565 case 'M': case 'm': 566 *result = n * M; 567 if (*result/M != n) return false; 568 return true; 569 case 'K': case 'k': 570 *result = n * K; 571 if (*result/K != n) return false; 572 return true; 573 case '\0': 574 *result = n; 575 return true; 576 default: 577 return false; 578 } 579} 580 581Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) { 582 if (size < min_size) return arg_too_small; 583 // Check that size will fit in a size_t (only relevant on 32-bit) 584 if (size > max_uintx) return arg_too_big; 585 return arg_in_range; 586} 587 588// Describe an argument out of range error 589void Arguments::describe_range_error(ArgsRange errcode) { 590 switch(errcode) { 591 case arg_too_big: 592 jio_fprintf(defaultStream::error_stream(), 593 "The specified size exceeds the maximum " 594 "representable size.\n"); 595 break; 596 case arg_too_small: 597 case arg_unreadable: 598 case arg_in_range: 599 // do nothing for now 600 break; 601 default: 602 ShouldNotReachHere(); 603 } 604} 605 606static bool set_bool_flag(char* name, bool value, Flag::Flags origin) { 607 return CommandLineFlags::boolAtPut(name, &value, origin); 608} 609 610static bool set_fp_numeric_flag(char* name, char* value, Flag::Flags origin) { 611 double v; 612 if (sscanf(value, "%lf", &v) != 1) { 613 return false; 614 } 615 616 if (CommandLineFlags::doubleAtPut(name, &v, origin)) { 617 return true; 618 } 619 return false; 620} 621 622static bool set_numeric_flag(char* name, char* value, Flag::Flags origin) { 623 julong v; 624 intx intx_v; 625 bool is_neg = false; 626 // Check the sign first since atomull() parses only unsigned values. 627 if (*value == '-') { 628 if (!CommandLineFlags::intxAt(name, &intx_v)) { 629 return false; 630 } 631 value++; 632 is_neg = true; 633 } 634 if (!atomull(value, &v)) { 635 return false; 636 } 637 intx_v = (intx) v; 638 if (is_neg) { 639 intx_v = -intx_v; 640 } 641 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) { 642 return true; 643 } 644 uintx uintx_v = (uintx) v; 645 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) { 646 return true; 647 } 648 uint64_t uint64_t_v = (uint64_t) v; 649 if (!is_neg && CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin)) { 650 return true; 651 } 652 size_t size_t_v = (size_t) v; 653 if (!is_neg && CommandLineFlags::size_tAtPut(name, &size_t_v, origin)) { 654 return true; 655 } 656 return false; 657} 658 659static bool set_string_flag(char* name, const char* value, Flag::Flags origin) { 660 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false; 661 // Contract: CommandLineFlags always returns a pointer that needs freeing. 662 FREE_C_HEAP_ARRAY(char, value, mtInternal); 663 return true; 664} 665 666static bool append_to_string_flag(char* name, const char* new_value, Flag::Flags origin) { 667 const char* old_value = ""; 668 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false; 669 size_t old_len = old_value != NULL ? strlen(old_value) : 0; 670 size_t new_len = strlen(new_value); 671 const char* value; 672 char* free_this_too = NULL; 673 if (old_len == 0) { 674 value = new_value; 675 } else if (new_len == 0) { 676 value = old_value; 677 } else { 678 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtInternal); 679 // each new setting adds another LINE to the switch: 680 sprintf(buf, "%s\n%s", old_value, new_value); 681 value = buf; 682 free_this_too = buf; 683 } 684 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); 685 // CommandLineFlags always returns a pointer that needs freeing. 686 FREE_C_HEAP_ARRAY(char, value, mtInternal); 687 if (free_this_too != NULL) { 688 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. 689 FREE_C_HEAP_ARRAY(char, free_this_too, mtInternal); 690 } 691 return true; 692} 693 694bool Arguments::parse_argument(const char* arg, Flag::Flags origin) { 695 696 // range of acceptable characters spelled out for portability reasons 697#define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" 698#define BUFLEN 255 699 char name[BUFLEN+1]; 700 char dummy; 701 702 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 703 return set_bool_flag(name, false, origin); 704 } 705 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 706 return set_bool_flag(name, true, origin); 707 } 708 709 char punct; 710 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { 711 const char* value = strchr(arg, '=') + 1; 712 Flag* flag = Flag::find_flag(name, strlen(name)); 713 if (flag != NULL && flag->is_ccstr()) { 714 if (flag->ccstr_accumulates()) { 715 return append_to_string_flag(name, value, origin); 716 } else { 717 if (value[0] == '\0') { 718 value = NULL; 719 } 720 return set_string_flag(name, value, origin); 721 } 722 } 723 } 724 725 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { 726 const char* value = strchr(arg, '=') + 1; 727 // -XX:Foo:=xxx will reset the string flag to the given value. 728 if (value[0] == '\0') { 729 value = NULL; 730 } 731 return set_string_flag(name, value, origin); 732 } 733 734#define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" 735#define SIGNED_NUMBER_RANGE "[-0123456789]" 736#define NUMBER_RANGE "[0123456789]" 737 char value[BUFLEN + 1]; 738 char value2[BUFLEN + 1]; 739 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { 740 // Looks like a floating-point number -- try again with more lenient format string 741 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { 742 return set_fp_numeric_flag(name, value, origin); 743 } 744 } 745 746#define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]" 747 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { 748 return set_numeric_flag(name, value, origin); 749 } 750 751 return false; 752} 753 754void Arguments::add_string(char*** bldarray, int* count, const char* arg) { 755 assert(bldarray != NULL, "illegal argument"); 756 757 if (arg == NULL) { 758 return; 759 } 760 761 int new_count = *count + 1; 762 763 // expand the array and add arg to the last element 764 if (*bldarray == NULL) { 765 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtInternal); 766 } else { 767 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtInternal); 768 } 769 (*bldarray)[*count] = os::strdup_check_oom(arg); 770 *count = new_count; 771} 772 773void Arguments::build_jvm_args(const char* arg) { 774 add_string(&_jvm_args_array, &_num_jvm_args, arg); 775} 776 777void Arguments::build_jvm_flags(const char* arg) { 778 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); 779} 780 781// utility function to return a string that concatenates all 782// strings in a given char** array 783const char* Arguments::build_resource_string(char** args, int count) { 784 if (args == NULL || count == 0) { 785 return NULL; 786 } 787 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator 788 for (int i = 1; i < count; i++) { 789 length += strlen(args[i]) + 1; // add 1 for a space 790 } 791 char* s = NEW_RESOURCE_ARRAY(char, length); 792 strcpy(s, args[0]); 793 for (int j = 1; j < count; j++) { 794 strcat(s, " "); 795 strcat(s, args[j]); 796 } 797 return (const char*) s; 798} 799 800void Arguments::print_on(outputStream* st) { 801 st->print_cr("VM Arguments:"); 802 if (num_jvm_flags() > 0) { 803 st->print("jvm_flags: "); print_jvm_flags_on(st); 804 } 805 if (num_jvm_args() > 0) { 806 st->print("jvm_args: "); print_jvm_args_on(st); 807 } 808 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); 809 if (_java_class_path != NULL) { 810 char* path = _java_class_path->value(); 811 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path ); 812 } 813 st->print_cr("Launcher Type: %s", _sun_java_launcher); 814} 815 816void Arguments::print_jvm_flags_on(outputStream* st) { 817 if (_num_jvm_flags > 0) { 818 for (int i=0; i < _num_jvm_flags; i++) { 819 st->print("%s ", _jvm_flags_array[i]); 820 } 821 st->cr(); 822 } 823} 824 825void Arguments::print_jvm_args_on(outputStream* st) { 826 if (_num_jvm_args > 0) { 827 for (int i=0; i < _num_jvm_args; i++) { 828 st->print("%s ", _jvm_args_array[i]); 829 } 830 st->cr(); 831 } 832} 833 834bool Arguments::process_argument(const char* arg, 835 jboolean ignore_unrecognized, Flag::Flags origin) { 836 837 JDK_Version since = JDK_Version(); 838 839 if (parse_argument(arg, origin) || ignore_unrecognized) { 840 return true; 841 } 842 843 bool has_plus_minus = (*arg == '+' || *arg == '-'); 844 const char* const argname = has_plus_minus ? arg + 1 : arg; 845 if (is_newly_obsolete(arg, &since)) { 846 char version[256]; 847 since.to_string(version, sizeof(version)); 848 warning("ignoring option %s; support was removed in %s", argname, version); 849 return true; 850 } 851 852 // For locked flags, report a custom error message if available. 853 // Otherwise, report the standard unrecognized VM option. 854 855 size_t arg_len; 856 const char* equal_sign = strchr(argname, '='); 857 if (equal_sign == NULL) { 858 arg_len = strlen(argname); 859 } else { 860 arg_len = equal_sign - argname; 861 } 862 863 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true); 864 if (found_flag != NULL) { 865 char locked_message_buf[BUFLEN]; 866 found_flag->get_locked_message(locked_message_buf, BUFLEN); 867 if (strlen(locked_message_buf) == 0) { 868 if (found_flag->is_bool() && !has_plus_minus) { 869 jio_fprintf(defaultStream::error_stream(), 870 "Missing +/- setting for VM option '%s'\n", argname); 871 } else if (!found_flag->is_bool() && has_plus_minus) { 872 jio_fprintf(defaultStream::error_stream(), 873 "Unexpected +/- setting in VM option '%s'\n", argname); 874 } else { 875 jio_fprintf(defaultStream::error_stream(), 876 "Improperly specified VM option '%s'\n", argname); 877 } 878 } else { 879 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf); 880 } 881 } else { 882 jio_fprintf(defaultStream::error_stream(), 883 "Unrecognized VM option '%s'\n", argname); 884 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true); 885 if (fuzzy_matched != NULL) { 886 jio_fprintf(defaultStream::error_stream(), 887 "Did you mean '%s%s%s'?\n", 888 (fuzzy_matched->is_bool()) ? "(+/-)" : "", 889 fuzzy_matched->_name, 890 (fuzzy_matched->is_bool()) ? "" : "=<value>"); 891 } 892 } 893 894 // allow for commandline "commenting out" options like -XX:#+Verbose 895 return arg[0] == '#'; 896} 897 898bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { 899 FILE* stream = fopen(file_name, "rb"); 900 if (stream == NULL) { 901 if (should_exist) { 902 jio_fprintf(defaultStream::error_stream(), 903 "Could not open settings file %s\n", file_name); 904 return false; 905 } else { 906 return true; 907 } 908 } 909 910 char token[1024]; 911 int pos = 0; 912 913 bool in_white_space = true; 914 bool in_comment = false; 915 bool in_quote = false; 916 char quote_c = 0; 917 bool result = true; 918 919 int c = getc(stream); 920 while(c != EOF && pos < (int)(sizeof(token)-1)) { 921 if (in_white_space) { 922 if (in_comment) { 923 if (c == '\n') in_comment = false; 924 } else { 925 if (c == '#') in_comment = true; 926 else if (!isspace(c)) { 927 in_white_space = false; 928 token[pos++] = c; 929 } 930 } 931 } else { 932 if (c == '\n' || (!in_quote && isspace(c))) { 933 // token ends at newline, or at unquoted whitespace 934 // this allows a way to include spaces in string-valued options 935 token[pos] = '\0'; 936 logOption(token); 937 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE); 938 build_jvm_flags(token); 939 pos = 0; 940 in_white_space = true; 941 in_quote = false; 942 } else if (!in_quote && (c == '\'' || c == '"')) { 943 in_quote = true; 944 quote_c = c; 945 } else if (in_quote && (c == quote_c)) { 946 in_quote = false; 947 } else { 948 token[pos++] = c; 949 } 950 } 951 c = getc(stream); 952 } 953 if (pos > 0) { 954 token[pos] = '\0'; 955 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE); 956 build_jvm_flags(token); 957 } 958 fclose(stream); 959 return result; 960} 961 962//============================================================================================================= 963// Parsing of properties (-D) 964 965const char* Arguments::get_property(const char* key) { 966 return PropertyList_get_value(system_properties(), key); 967} 968 969bool Arguments::add_property(const char* prop) { 970 const char* eq = strchr(prop, '='); 971 char* key; 972 // ns must be static--its address may be stored in a SystemProperty object. 973 const static char ns[1] = {0}; 974 char* value = (char *)ns; 975 976 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop); 977 key = AllocateHeap(key_len + 1, mtInternal); 978 strncpy(key, prop, key_len); 979 key[key_len] = '\0'; 980 981 if (eq != NULL) { 982 size_t value_len = strlen(prop) - key_len - 1; 983 value = AllocateHeap(value_len + 1, mtInternal); 984 strncpy(value, &prop[key_len + 1], value_len + 1); 985 } 986 987 if (strcmp(key, "java.compiler") == 0) { 988 process_java_compiler_argument(value); 989 FreeHeap(key); 990 if (eq != NULL) { 991 FreeHeap(value); 992 } 993 return true; 994 } else if (strcmp(key, "sun.java.command") == 0) { 995 _java_command = value; 996 997 // Record value in Arguments, but let it get passed to Java. 998 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 || 999 strcmp(key, "sun.java.launcher.pid") == 0) { 1000 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are 1001 // private and are processed in process_sun_java_launcher_properties(); 1002 // the sun.java.launcher property is passed on to the java application 1003 FreeHeap(key); 1004 if (eq != NULL) { 1005 FreeHeap(value); 1006 } 1007 return true; 1008 } else if (strcmp(key, "java.vendor.url.bug") == 0) { 1009 // save it in _java_vendor_url_bug, so JVM fatal error handler can access 1010 // its value without going through the property list or making a Java call. 1011 _java_vendor_url_bug = value; 1012 } else if (strcmp(key, "sun.boot.library.path") == 0) { 1013 PropertyList_unique_add(&_system_properties, key, value, true); 1014 return true; 1015 } 1016 // Create new property and add at the end of the list 1017 PropertyList_unique_add(&_system_properties, key, value); 1018 return true; 1019} 1020 1021//=========================================================================================================== 1022// Setting int/mixed/comp mode flags 1023 1024void Arguments::set_mode_flags(Mode mode) { 1025 // Set up default values for all flags. 1026 // If you add a flag to any of the branches below, 1027 // add a default value for it here. 1028 set_java_compiler(false); 1029 _mode = mode; 1030 1031 // Ensure Agent_OnLoad has the correct initial values. 1032 // This may not be the final mode; mode may change later in onload phase. 1033 PropertyList_unique_add(&_system_properties, "java.vm.info", 1034 (char*)VM_Version::vm_info_string(), false); 1035 1036 UseInterpreter = true; 1037 UseCompiler = true; 1038 UseLoopCounter = true; 1039 1040 // Default values may be platform/compiler dependent - 1041 // use the saved values 1042 ClipInlining = Arguments::_ClipInlining; 1043 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; 1044 UseOnStackReplacement = Arguments::_UseOnStackReplacement; 1045 BackgroundCompilation = Arguments::_BackgroundCompilation; 1046 1047 // Change from defaults based on mode 1048 switch (mode) { 1049 default: 1050 ShouldNotReachHere(); 1051 break; 1052 case _int: 1053 UseCompiler = false; 1054 UseLoopCounter = false; 1055 AlwaysCompileLoopMethods = false; 1056 UseOnStackReplacement = false; 1057 break; 1058 case _mixed: 1059 // same as default 1060 break; 1061 case _comp: 1062 UseInterpreter = false; 1063 BackgroundCompilation = false; 1064 ClipInlining = false; 1065 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more. 1066 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and 1067 // compile a level 4 (C2) and then continue executing it. 1068 if (TieredCompilation) { 1069 Tier3InvokeNotifyFreqLog = 0; 1070 Tier4InvocationThreshold = 0; 1071 } 1072 break; 1073 } 1074} 1075 1076#if defined(COMPILER2) || defined(_LP64) || !INCLUDE_CDS 1077// Conflict: required to use shared spaces (-Xshare:on), but 1078// incompatible command line options were chosen. 1079 1080static void no_shared_spaces(const char* message) { 1081 if (RequireSharedSpaces) { 1082 jio_fprintf(defaultStream::error_stream(), 1083 "Class data sharing is inconsistent with other specified options.\n"); 1084 vm_exit_during_initialization("Unable to use shared archive.", message); 1085 } else { 1086 FLAG_SET_DEFAULT(UseSharedSpaces, false); 1087 } 1088} 1089#endif 1090 1091// Returns threshold scaled with CompileThresholdScaling 1092intx Arguments::get_scaled_compile_threshold(intx threshold) { 1093 return (intx)(threshold * CompileThresholdScaling); 1094} 1095 1096// Returns freq_log scaled with CompileThresholdScaling 1097intx Arguments::get_scaled_freq_log(intx freq_log) { 1098 intx scaled_freq = get_scaled_compile_threshold((intx)1 << freq_log); 1099 if (scaled_freq == 0) { 1100 return 0; 1101 } else { 1102 return log2_intptr(scaled_freq); 1103 } 1104} 1105 1106void Arguments::set_tiered_flags() { 1107 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3. 1108 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) { 1109 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3); 1110 } 1111 if (CompilationPolicyChoice < 2) { 1112 vm_exit_during_initialization( 1113 "Incompatible compilation policy selected", NULL); 1114 } 1115 // Increase the code cache size - tiered compiles a lot more. 1116 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { 1117 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize, ReservedCodeCacheSize * 5); 1118 } 1119 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M 1120 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) { 1121 FLAG_SET_ERGO(bool, SegmentedCodeCache, true); 1122 1123 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { 1124 // Multiply sizes by 5 but fix NonNMethodCodeHeapSize (distribute among non-profiled and profiled code heap) 1125 if (FLAG_IS_DEFAULT(ProfiledCodeHeapSize)) { 1126 FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, ProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2); 1127 } 1128 if (FLAG_IS_DEFAULT(NonProfiledCodeHeapSize)) { 1129 FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, NonProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2); 1130 } 1131 // Check consistency of code heap sizes 1132 if ((NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) { 1133 jio_fprintf(defaultStream::error_stream(), 1134 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n", 1135 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K, 1136 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K); 1137 vm_exit(1); 1138 } 1139 } 1140 } 1141 if (!UseInterpreter) { // -Xcomp 1142 Tier3InvokeNotifyFreqLog = 0; 1143 Tier4InvocationThreshold = 0; 1144 } 1145 // Scale tiered compilation thresholds 1146 if (!FLAG_IS_DEFAULT(CompileThresholdScaling)) { 1147 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, get_scaled_freq_log(Tier0InvokeNotifyFreqLog)); 1148 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, get_scaled_freq_log(Tier0BackedgeNotifyFreqLog)); 1149 1150 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, get_scaled_compile_threshold(Tier3InvocationThreshold)); 1151 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, get_scaled_compile_threshold(Tier3MinInvocationThreshold)); 1152 FLAG_SET_ERGO(intx, Tier3CompileThreshold, get_scaled_compile_threshold(Tier3CompileThreshold)); 1153 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, get_scaled_compile_threshold(Tier3BackEdgeThreshold)); 1154 1155 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here 1156 // once these thresholds become supported. 1157 1158 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, get_scaled_freq_log(Tier2InvokeNotifyFreqLog)); 1159 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, get_scaled_freq_log(Tier2BackedgeNotifyFreqLog)); 1160 1161 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, get_scaled_freq_log(Tier3InvokeNotifyFreqLog)); 1162 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, get_scaled_freq_log(Tier3BackedgeNotifyFreqLog)); 1163 1164 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, get_scaled_freq_log(Tier23InlineeNotifyFreqLog)); 1165 1166 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, get_scaled_compile_threshold(Tier4InvocationThreshold)); 1167 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, get_scaled_compile_threshold(Tier4MinInvocationThreshold)); 1168 FLAG_SET_ERGO(intx, Tier4CompileThreshold, get_scaled_compile_threshold(Tier4CompileThreshold)); 1169 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, get_scaled_compile_threshold(Tier4BackEdgeThreshold)); 1170 } 1171} 1172 1173/** 1174 * Returns the minimum number of compiler threads needed to run the JVM. The following 1175 * configurations are possible. 1176 * 1177 * 1) The JVM is build using an interpreter only. As a result, the minimum number of 1178 * compiler threads is 0. 1179 * 2) The JVM is build using the compiler(s) and tiered compilation is disabled. As 1180 * a result, either C1 or C2 is used, so the minimum number of compiler threads is 1. 1181 * 3) The JVM is build using the compiler(s) and tiered compilation is enabled. However, 1182 * the option "TieredStopAtLevel < CompLevel_full_optimization". As a result, only 1183 * C1 can be used, so the minimum number of compiler threads is 1. 1184 * 4) The JVM is build using the compilers and tiered compilation is enabled. The option 1185 * 'TieredStopAtLevel = CompLevel_full_optimization' (the default value). As a result, 1186 * the minimum number of compiler threads is 2. 1187 */ 1188int Arguments::get_min_number_of_compiler_threads() { 1189#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 1190 return 0; // case 1 1191#else 1192 if (!TieredCompilation || (TieredStopAtLevel < CompLevel_full_optimization)) { 1193 return 1; // case 2 or case 3 1194 } 1195 return 2; // case 4 (tiered) 1196#endif 1197} 1198 1199#if INCLUDE_ALL_GCS 1200static void disable_adaptive_size_policy(const char* collector_name) { 1201 if (UseAdaptiveSizePolicy) { 1202 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) { 1203 warning("disabling UseAdaptiveSizePolicy; it is incompatible with %s.", 1204 collector_name); 1205 } 1206 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); 1207 } 1208} 1209 1210void Arguments::set_parnew_gc_flags() { 1211 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC, 1212 "control point invariant"); 1213 assert(UseParNewGC, "Error"); 1214 1215 // Turn off AdaptiveSizePolicy for parnew until it is complete. 1216 disable_adaptive_size_policy("UseParNewGC"); 1217 1218 if (FLAG_IS_DEFAULT(ParallelGCThreads)) { 1219 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads()); 1220 assert(ParallelGCThreads > 0, "We should always have at least one thread by default"); 1221 } else if (ParallelGCThreads == 0) { 1222 jio_fprintf(defaultStream::error_stream(), 1223 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n"); 1224 vm_exit(1); 1225 } 1226 1227 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively, 1228 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration 1229 // we set them to 1024 and 1024. 1230 // See CR 6362902. 1231 if (FLAG_IS_DEFAULT(YoungPLABSize)) { 1232 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); 1233 } 1234 if (FLAG_IS_DEFAULT(OldPLABSize)) { 1235 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); 1236 } 1237 1238 // When using compressed oops, we use local overflow stacks, 1239 // rather than using a global overflow list chained through 1240 // the klass word of the object's pre-image. 1241 if (UseCompressedOops && !ParGCUseLocalOverflow) { 1242 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) { 1243 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references"); 1244 } 1245 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true); 1246 } 1247 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error"); 1248} 1249 1250// Adjust some sizes to suit CMS and/or ParNew needs; these work well on 1251// sparc/solaris for certain applications, but would gain from 1252// further optimization and tuning efforts, and would almost 1253// certainly gain from analysis of platform and environment. 1254void Arguments::set_cms_and_parnew_gc_flags() { 1255 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error"); 1256 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); 1257 1258 // If we are using CMS, we prefer to UseParNewGC, 1259 // unless explicitly forbidden. 1260 if (FLAG_IS_DEFAULT(UseParNewGC)) { 1261 FLAG_SET_ERGO(bool, UseParNewGC, true); 1262 } 1263 1264 // Turn off AdaptiveSizePolicy by default for cms until it is complete. 1265 disable_adaptive_size_policy("UseConcMarkSweepGC"); 1266 1267 // In either case, adjust ParallelGCThreads and/or UseParNewGC 1268 // as needed. 1269 if (UseParNewGC) { 1270 set_parnew_gc_flags(); 1271 } 1272 1273 size_t max_heap = align_size_down(MaxHeapSize, 1274 CardTableRS::ct_max_alignment_constraint()); 1275 1276 // Now make adjustments for CMS 1277 intx tenuring_default = (intx)6; 1278 size_t young_gen_per_worker = CMSYoungGenPerWorker; 1279 1280 // Preferred young gen size for "short" pauses: 1281 // upper bound depends on # of threads and NewRatio. 1282 const uintx parallel_gc_threads = 1283 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); 1284 const size_t preferred_max_new_size_unaligned = 1285 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * parallel_gc_threads)); 1286 size_t preferred_max_new_size = 1287 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); 1288 1289 // Unless explicitly requested otherwise, size young gen 1290 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads 1291 1292 // If either MaxNewSize or NewRatio is set on the command line, 1293 // assume the user is trying to set the size of the young gen. 1294 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) { 1295 1296 // Set MaxNewSize to our calculated preferred_max_new_size unless 1297 // NewSize was set on the command line and it is larger than 1298 // preferred_max_new_size. 1299 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line 1300 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); 1301 } else { 1302 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size); 1303 } 1304 if (PrintGCDetails && Verbose) { 1305 // Too early to use gclog_or_tty 1306 tty->print_cr("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); 1307 } 1308 1309 // Code along this path potentially sets NewSize and OldSize 1310 if (PrintGCDetails && Verbose) { 1311 // Too early to use gclog_or_tty 1312 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT 1313 " initial_heap_size: " SIZE_FORMAT 1314 " max_heap: " SIZE_FORMAT, 1315 min_heap_size(), InitialHeapSize, max_heap); 1316 } 1317 size_t min_new = preferred_max_new_size; 1318 if (FLAG_IS_CMDLINE(NewSize)) { 1319 min_new = NewSize; 1320 } 1321 if (max_heap > min_new && min_heap_size() > min_new) { 1322 // Unless explicitly requested otherwise, make young gen 1323 // at least min_new, and at most preferred_max_new_size. 1324 if (FLAG_IS_DEFAULT(NewSize)) { 1325 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new)); 1326 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize)); 1327 if (PrintGCDetails && Verbose) { 1328 // Too early to use gclog_or_tty 1329 tty->print_cr("CMS ergo set NewSize: " SIZE_FORMAT, NewSize); 1330 } 1331 } 1332 // Unless explicitly requested otherwise, size old gen 1333 // so it's NewRatio x of NewSize. 1334 if (FLAG_IS_DEFAULT(OldSize)) { 1335 if (max_heap > NewSize) { 1336 FLAG_SET_ERGO(uintx, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize)); 1337 if (PrintGCDetails && Verbose) { 1338 // Too early to use gclog_or_tty 1339 tty->print_cr("CMS ergo set OldSize: " SIZE_FORMAT, OldSize); 1340 } 1341 } 1342 } 1343 } 1344 } 1345 // Unless explicitly requested otherwise, definitely 1346 // promote all objects surviving "tenuring_default" scavenges. 1347 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && 1348 FLAG_IS_DEFAULT(SurvivorRatio)) { 1349 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default); 1350 } 1351 // If we decided above (or user explicitly requested) 1352 // `promote all' (via MaxTenuringThreshold := 0), 1353 // prefer minuscule survivor spaces so as not to waste 1354 // space for (non-existent) survivors 1355 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { 1356 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio)); 1357 } 1358 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, 1359 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. 1360 // This is done in order to make ParNew+CMS configuration to work 1361 // with YoungPLABSize and OldPLABSize options. 1362 // See CR 6362902. 1363 if (!FLAG_IS_DEFAULT(OldPLABSize)) { 1364 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { 1365 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim 1366 // is. In this situation let CMSParPromoteBlocksToClaim follow 1367 // the value (either from the command line or ergonomics) of 1368 // OldPLABSize. Following OldPLABSize is an ergonomics decision. 1369 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); 1370 } else { 1371 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. 1372 // CMSParPromoteBlocksToClaim is a collector-specific flag, so 1373 // we'll let it to take precedence. 1374 jio_fprintf(defaultStream::error_stream(), 1375 "Both OldPLABSize and CMSParPromoteBlocksToClaim" 1376 " options are specified for the CMS collector." 1377 " CMSParPromoteBlocksToClaim will take precedence.\n"); 1378 } 1379 } 1380 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) { 1381 // OldPLAB sizing manually turned off: Use a larger default setting, 1382 // unless it was manually specified. This is because a too-low value 1383 // will slow down scavenges. 1384 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { 1385 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, 50); // default value before 6631166 1386 } 1387 } 1388 // Overwrite OldPLABSize which is the variable we will internally use everywhere. 1389 FLAG_SET_ERGO(uintx, OldPLABSize, CMSParPromoteBlocksToClaim); 1390 // If either of the static initialization defaults have changed, note this 1391 // modification. 1392 if (!FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim) || !FLAG_IS_DEFAULT(OldPLABWeight)) { 1393 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight); 1394 } 1395 if (PrintGCDetails && Verbose) { 1396 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", 1397 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K)); 1398 tty->print_cr("ConcGCThreads: %u", (uint) ConcGCThreads); 1399 } 1400} 1401#endif // INCLUDE_ALL_GCS 1402 1403void set_object_alignment() { 1404 // Object alignment. 1405 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); 1406 MinObjAlignmentInBytes = ObjectAlignmentInBytes; 1407 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); 1408 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; 1409 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); 1410 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; 1411 1412 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); 1413 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; 1414 1415 // Oop encoding heap max 1416 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; 1417 1418#if INCLUDE_ALL_GCS 1419 // Set CMS global values 1420 CompactibleFreeListSpace::set_cms_values(); 1421#endif // INCLUDE_ALL_GCS 1422} 1423 1424bool verify_object_alignment() { 1425 // Object alignment. 1426 if (!is_power_of_2(ObjectAlignmentInBytes)) { 1427 jio_fprintf(defaultStream::error_stream(), 1428 "error: ObjectAlignmentInBytes=%d must be power of 2\n", 1429 (int)ObjectAlignmentInBytes); 1430 return false; 1431 } 1432 if ((int)ObjectAlignmentInBytes < BytesPerLong) { 1433 jio_fprintf(defaultStream::error_stream(), 1434 "error: ObjectAlignmentInBytes=%d must be greater or equal %d\n", 1435 (int)ObjectAlignmentInBytes, BytesPerLong); 1436 return false; 1437 } 1438 // It does not make sense to have big object alignment 1439 // since a space lost due to alignment will be greater 1440 // then a saved space from compressed oops. 1441 if ((int)ObjectAlignmentInBytes > 256) { 1442 jio_fprintf(defaultStream::error_stream(), 1443 "error: ObjectAlignmentInBytes=%d must not be greater than 256\n", 1444 (int)ObjectAlignmentInBytes); 1445 return false; 1446 } 1447 // In case page size is very small. 1448 if ((int)ObjectAlignmentInBytes >= os::vm_page_size()) { 1449 jio_fprintf(defaultStream::error_stream(), 1450 "error: ObjectAlignmentInBytes=%d must be less than page size %d\n", 1451 (int)ObjectAlignmentInBytes, os::vm_page_size()); 1452 return false; 1453 } 1454 if(SurvivorAlignmentInBytes == 0) { 1455 SurvivorAlignmentInBytes = ObjectAlignmentInBytes; 1456 } else { 1457 if (!is_power_of_2(SurvivorAlignmentInBytes)) { 1458 jio_fprintf(defaultStream::error_stream(), 1459 "error: SurvivorAlignmentInBytes=%d must be power of 2\n", 1460 (int)SurvivorAlignmentInBytes); 1461 return false; 1462 } 1463 if (SurvivorAlignmentInBytes < ObjectAlignmentInBytes) { 1464 jio_fprintf(defaultStream::error_stream(), 1465 "error: SurvivorAlignmentInBytes=%d must be greater than ObjectAlignmentInBytes=%d \n", 1466 (int)SurvivorAlignmentInBytes, (int)ObjectAlignmentInBytes); 1467 return false; 1468 } 1469 } 1470 return true; 1471} 1472 1473size_t Arguments::max_heap_for_compressed_oops() { 1474 // Avoid sign flip. 1475 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size"); 1476 // We need to fit both the NULL page and the heap into the memory budget, while 1477 // keeping alignment constraints of the heap. To guarantee the latter, as the 1478 // NULL page is located before the heap, we pad the NULL page to the conservative 1479 // maximum alignment that the GC may ever impose upon the heap. 1480 size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(), 1481 _conservative_max_heap_alignment); 1482 1483 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page); 1484 NOT_LP64(ShouldNotReachHere(); return 0); 1485} 1486 1487bool Arguments::should_auto_select_low_pause_collector() { 1488 if (UseAutoGCSelectPolicy && 1489 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && 1490 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { 1491 if (PrintGCDetails) { 1492 // Cannot use gclog_or_tty yet. 1493 tty->print_cr("Automatic selection of the low pause collector" 1494 " based on pause goal of %d (ms)", (int) MaxGCPauseMillis); 1495 } 1496 return true; 1497 } 1498 return false; 1499} 1500 1501void Arguments::set_use_compressed_oops() { 1502#ifndef ZERO 1503#ifdef _LP64 1504 // MaxHeapSize is not set up properly at this point, but 1505 // the only value that can override MaxHeapSize if we are 1506 // to use UseCompressedOops is InitialHeapSize. 1507 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize); 1508 1509 if (max_heap_size <= max_heap_for_compressed_oops()) { 1510#if !defined(COMPILER1) || defined(TIERED) 1511 if (FLAG_IS_DEFAULT(UseCompressedOops)) { 1512 FLAG_SET_ERGO(bool, UseCompressedOops, true); 1513 } 1514#endif 1515#ifdef _WIN64 1516 if (UseLargePages && UseCompressedOops) { 1517 // Cannot allocate guard pages for implicit checks in indexed addressing 1518 // mode, when large pages are specified on windows. 1519 // This flag could be switched ON if narrow oop base address is set to 0, 1520 // see code in Universe::initialize_heap(). 1521 Universe::set_narrow_oop_use_implicit_null_checks(false); 1522 } 1523#endif // _WIN64 1524 } else { 1525 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { 1526 warning("Max heap size too large for Compressed Oops"); 1527 FLAG_SET_DEFAULT(UseCompressedOops, false); 1528 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1529 } 1530 } 1531#endif // _LP64 1532#endif // ZERO 1533} 1534 1535 1536// NOTE: set_use_compressed_klass_ptrs() must be called after calling 1537// set_use_compressed_oops(). 1538void Arguments::set_use_compressed_klass_ptrs() { 1539#ifndef ZERO 1540#ifdef _LP64 1541 // UseCompressedOops must be on for UseCompressedClassPointers to be on. 1542 if (!UseCompressedOops) { 1543 if (UseCompressedClassPointers) { 1544 warning("UseCompressedClassPointers requires UseCompressedOops"); 1545 } 1546 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1547 } else { 1548 // Turn on UseCompressedClassPointers too 1549 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) { 1550 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true); 1551 } 1552 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs. 1553 if (UseCompressedClassPointers) { 1554 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) { 1555 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers"); 1556 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1557 } 1558 } 1559 } 1560#endif // _LP64 1561#endif // !ZERO 1562} 1563 1564void Arguments::set_conservative_max_heap_alignment() { 1565 // The conservative maximum required alignment for the heap is the maximum of 1566 // the alignments imposed by several sources: any requirements from the heap 1567 // itself, the collector policy and the maximum page size we may run the VM 1568 // with. 1569 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment(); 1570#if INCLUDE_ALL_GCS 1571 if (UseParallelGC) { 1572 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment(); 1573 } else if (UseG1GC) { 1574 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment(); 1575 } 1576#endif // INCLUDE_ALL_GCS 1577 _conservative_max_heap_alignment = MAX4(heap_alignment, 1578 (size_t)os::vm_allocation_granularity(), 1579 os::max_page_size(), 1580 CollectorPolicy::compute_heap_alignment()); 1581} 1582 1583void Arguments::select_gc_ergonomically() { 1584 if (os::is_server_class_machine()) { 1585 if (should_auto_select_low_pause_collector()) { 1586 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); 1587 } else { 1588 FLAG_SET_ERGO(bool, UseParallelGC, true); 1589 } 1590 } 1591} 1592 1593void Arguments::select_gc() { 1594 if (!gc_selected()) { 1595 ArgumentsExt::select_gc_ergonomically(); 1596 } 1597} 1598 1599void Arguments::set_ergonomics_flags() { 1600 select_gc(); 1601 1602#ifdef COMPILER2 1603 // Shared spaces work fine with other GCs but causes bytecode rewriting 1604 // to be disabled, which hurts interpreter performance and decreases 1605 // server performance. When -server is specified, keep the default off 1606 // unless it is asked for. Future work: either add bytecode rewriting 1607 // at link time, or rewrite bytecodes in non-shared methods. 1608 if (!DumpSharedSpaces && !RequireSharedSpaces && 1609 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) { 1610 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on."); 1611 } 1612#endif 1613 1614 set_conservative_max_heap_alignment(); 1615 1616#ifndef ZERO 1617#ifdef _LP64 1618 set_use_compressed_oops(); 1619 1620 // set_use_compressed_klass_ptrs() must be called after calling 1621 // set_use_compressed_oops(). 1622 set_use_compressed_klass_ptrs(); 1623 1624 // Also checks that certain machines are slower with compressed oops 1625 // in vm_version initialization code. 1626#endif // _LP64 1627#endif // !ZERO 1628} 1629 1630void Arguments::set_parallel_gc_flags() { 1631 assert(UseParallelGC || UseParallelOldGC, "Error"); 1632 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file). 1633 if (FLAG_IS_DEFAULT(UseParallelOldGC)) { 1634 FLAG_SET_DEFAULT(UseParallelOldGC, true); 1635 } 1636 FLAG_SET_DEFAULT(UseParallelGC, true); 1637 1638 // If no heap maximum was requested explicitly, use some reasonable fraction 1639 // of the physical memory, up to a maximum of 1GB. 1640 FLAG_SET_DEFAULT(ParallelGCThreads, 1641 Abstract_VM_Version::parallel_worker_threads()); 1642 if (ParallelGCThreads == 0) { 1643 jio_fprintf(defaultStream::error_stream(), 1644 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n"); 1645 vm_exit(1); 1646 } 1647 1648 if (UseAdaptiveSizePolicy) { 1649 // We don't want to limit adaptive heap sizing's freedom to adjust the heap 1650 // unless the user actually sets these flags. 1651 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) { 1652 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0); 1653 _min_heap_free_ratio = MinHeapFreeRatio; 1654 } 1655 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) { 1656 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100); 1657 _max_heap_free_ratio = MaxHeapFreeRatio; 1658 } 1659 } 1660 1661 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the 1662 // SurvivorRatio has been set, reset their default values to SurvivorRatio + 1663 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. 1664 // See CR 6362902 for details. 1665 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { 1666 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { 1667 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); 1668 } 1669 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { 1670 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); 1671 } 1672 } 1673 1674 if (UseParallelOldGC) { 1675 // Par compact uses lower default values since they are treated as 1676 // minimums. These are different defaults because of the different 1677 // interpretation and are not ergonomically set. 1678 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { 1679 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); 1680 } 1681 } 1682} 1683 1684void Arguments::set_g1_gc_flags() { 1685 assert(UseG1GC, "Error"); 1686#ifdef COMPILER1 1687 FastTLABRefill = false; 1688#endif 1689 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads()); 1690 if (ParallelGCThreads == 0) { 1691 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0."); 1692 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL); 1693 } 1694 1695#if INCLUDE_ALL_GCS 1696 if (G1ConcRefinementThreads == 0) { 1697 FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads); 1698 } 1699#endif 1700 1701 // MarkStackSize will be set (if it hasn't been set by the user) 1702 // when concurrent marking is initialized. 1703 // Its value will be based upon the number of parallel marking threads. 1704 // But we do set the maximum mark stack size here. 1705 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) { 1706 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE); 1707 } 1708 1709 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) { 1710 // In G1, we want the default GC overhead goal to be higher than 1711 // say in PS. So we set it here to 10%. Otherwise the heap might 1712 // be expanded more aggressively than we would like it to. In 1713 // fact, even 10% seems to not be high enough in some cases 1714 // (especially small GC stress tests that the main thing they do 1715 // is allocation). We might consider increase it further. 1716 FLAG_SET_DEFAULT(GCTimeRatio, 9); 1717 } 1718 1719 if (PrintGCDetails && Verbose) { 1720 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", 1721 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K)); 1722 tty->print_cr("ConcGCThreads: %u", (uint) ConcGCThreads); 1723 } 1724} 1725 1726#if !INCLUDE_ALL_GCS 1727#ifdef ASSERT 1728static bool verify_serial_gc_flags() { 1729 return (UseSerialGC && 1730 !(UseParNewGC || (UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC || 1731 UseParallelGC || UseParallelOldGC)); 1732} 1733#endif // ASSERT 1734#endif // INCLUDE_ALL_GCS 1735 1736void Arguments::set_gc_specific_flags() { 1737#if INCLUDE_ALL_GCS 1738 // Set per-collector flags 1739 if (UseParallelGC || UseParallelOldGC) { 1740 set_parallel_gc_flags(); 1741 } else if (UseConcMarkSweepGC) { // Should be done before ParNew check below 1742 set_cms_and_parnew_gc_flags(); 1743 } else if (UseParNewGC) { // Skipped if CMS is set above 1744 set_parnew_gc_flags(); 1745 } else if (UseG1GC) { 1746 set_g1_gc_flags(); 1747 } 1748 check_deprecated_gcs(); 1749 check_deprecated_gc_flags(); 1750 if (AssumeMP && !UseSerialGC) { 1751 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { 1752 warning("If the number of processors is expected to increase from one, then" 1753 " you should configure the number of parallel GC threads appropriately" 1754 " using -XX:ParallelGCThreads=N"); 1755 } 1756 } 1757 if (MinHeapFreeRatio == 100) { 1758 // Keeping the heap 100% free is hard ;-) so limit it to 99%. 1759 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99); 1760 } 1761#else // INCLUDE_ALL_GCS 1762 assert(verify_serial_gc_flags(), "SerialGC unset"); 1763#endif // INCLUDE_ALL_GCS 1764} 1765 1766julong Arguments::limit_by_allocatable_memory(julong limit) { 1767 julong max_allocatable; 1768 julong result = limit; 1769 if (os::has_allocatable_memory_limit(&max_allocatable)) { 1770 result = MIN2(result, max_allocatable / MaxVirtMemFraction); 1771 } 1772 return result; 1773} 1774 1775// Use static initialization to get the default before parsing 1776static const uintx DefaultHeapBaseMinAddress = HeapBaseMinAddress; 1777 1778void Arguments::set_heap_size() { 1779 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) { 1780 // Deprecated flag 1781 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction); 1782 } 1783 1784 const julong phys_mem = 1785 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) 1786 : (julong)MaxRAM; 1787 1788 // If the maximum heap size has not been set with -Xmx, 1789 // then set it as fraction of the size of physical memory, 1790 // respecting the maximum and minimum sizes of the heap. 1791 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1792 julong reasonable_max = phys_mem / MaxRAMFraction; 1793 1794 if (phys_mem <= MaxHeapSize * MinRAMFraction) { 1795 // Small physical memory, so use a minimum fraction of it for the heap 1796 reasonable_max = phys_mem / MinRAMFraction; 1797 } else { 1798 // Not-small physical memory, so require a heap at least 1799 // as large as MaxHeapSize 1800 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); 1801 } 1802 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { 1803 // Limit the heap size to ErgoHeapSizeLimit 1804 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); 1805 } 1806 if (UseCompressedOops) { 1807 // Limit the heap size to the maximum possible when using compressed oops 1808 julong max_coop_heap = (julong)max_heap_for_compressed_oops(); 1809 1810 // HeapBaseMinAddress can be greater than default but not less than. 1811 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) { 1812 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) { 1813 // matches compressed oops printing flags 1814 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { 1815 jio_fprintf(defaultStream::error_stream(), 1816 "HeapBaseMinAddress must be at least " UINTX_FORMAT 1817 " (" UINTX_FORMAT "G) which is greater than value given " 1818 UINTX_FORMAT "\n", 1819 DefaultHeapBaseMinAddress, 1820 DefaultHeapBaseMinAddress/G, 1821 HeapBaseMinAddress); 1822 } 1823 FLAG_SET_ERGO(uintx, HeapBaseMinAddress, DefaultHeapBaseMinAddress); 1824 } 1825 } 1826 1827 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) { 1828 // Heap should be above HeapBaseMinAddress to get zero based compressed oops 1829 // but it should be not less than default MaxHeapSize. 1830 max_coop_heap -= HeapBaseMinAddress; 1831 } 1832 reasonable_max = MIN2(reasonable_max, max_coop_heap); 1833 } 1834 reasonable_max = limit_by_allocatable_memory(reasonable_max); 1835 1836 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { 1837 // An initial heap size was specified on the command line, 1838 // so be sure that the maximum size is consistent. Done 1839 // after call to limit_by_allocatable_memory because that 1840 // method might reduce the allocation size. 1841 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); 1842 } 1843 1844 if (PrintGCDetails && Verbose) { 1845 // Cannot use gclog_or_tty yet. 1846 tty->print_cr(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max); 1847 } 1848 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx)reasonable_max); 1849 } 1850 1851 // If the minimum or initial heap_size have not been set or requested to be set 1852 // ergonomically, set them accordingly. 1853 if (InitialHeapSize == 0 || min_heap_size() == 0) { 1854 julong reasonable_minimum = (julong)(OldSize + NewSize); 1855 1856 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); 1857 1858 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum); 1859 1860 if (InitialHeapSize == 0) { 1861 julong reasonable_initial = phys_mem / InitialRAMFraction; 1862 1863 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size()); 1864 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); 1865 1866 reasonable_initial = limit_by_allocatable_memory(reasonable_initial); 1867 1868 if (PrintGCDetails && Verbose) { 1869 // Cannot use gclog_or_tty yet. 1870 tty->print_cr(" Initial heap size " SIZE_FORMAT, (uintx)reasonable_initial); 1871 } 1872 FLAG_SET_ERGO(uintx, InitialHeapSize, (uintx)reasonable_initial); 1873 } 1874 // If the minimum heap size has not been set (via -Xms), 1875 // synchronize with InitialHeapSize to avoid errors with the default value. 1876 if (min_heap_size() == 0) { 1877 set_min_heap_size(MIN2((uintx)reasonable_minimum, InitialHeapSize)); 1878 if (PrintGCDetails && Verbose) { 1879 // Cannot use gclog_or_tty yet. 1880 tty->print_cr(" Minimum heap size " SIZE_FORMAT, min_heap_size()); 1881 } 1882 } 1883 } 1884} 1885 1886// This must be called after ergonomics because we want bytecode rewriting 1887// if the server compiler is used, or if UseSharedSpaces is disabled. 1888void Arguments::set_bytecode_flags() { 1889 // Better not attempt to store into a read-only space. 1890 if (UseSharedSpaces) { 1891 FLAG_SET_DEFAULT(RewriteBytecodes, false); 1892 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1893 } 1894 1895 if (!RewriteBytecodes) { 1896 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1897 } 1898} 1899 1900// Aggressive optimization flags -XX:+AggressiveOpts 1901void Arguments::set_aggressive_opts_flags() { 1902#ifdef COMPILER2 1903 if (AggressiveUnboxing) { 1904 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1905 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1906 } else if (!EliminateAutoBox) { 1907 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled"); 1908 AggressiveUnboxing = false; 1909 } 1910 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) { 1911 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); 1912 } else if (!DoEscapeAnalysis) { 1913 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled"); 1914 AggressiveUnboxing = false; 1915 } 1916 } 1917 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1918 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1919 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1920 } 1921 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1922 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); 1923 } 1924 1925 // Feed the cache size setting into the JDK 1926 char buffer[1024]; 1927 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); 1928 add_property(buffer); 1929 } 1930 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { 1931 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); 1932 } 1933#endif 1934 1935 if (AggressiveOpts) { 1936// Sample flag setting code 1937// if (FLAG_IS_DEFAULT(EliminateZeroing)) { 1938// FLAG_SET_DEFAULT(EliminateZeroing, true); 1939// } 1940 } 1941} 1942 1943//=========================================================================================================== 1944// Parsing of java.compiler property 1945 1946void Arguments::process_java_compiler_argument(char* arg) { 1947 // For backwards compatibility, Djava.compiler=NONE or "" 1948 // causes us to switch to -Xint mode UNLESS -Xdebug 1949 // is also specified. 1950 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 1951 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 1952 } 1953} 1954 1955void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 1956 _sun_java_launcher = os::strdup_check_oom(launcher); 1957} 1958 1959bool Arguments::created_by_java_launcher() { 1960 assert(_sun_java_launcher != NULL, "property must have value"); 1961 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 1962} 1963 1964bool Arguments::sun_java_launcher_is_altjvm() { 1965 return _sun_java_launcher_is_altjvm; 1966} 1967 1968//=========================================================================================================== 1969// Parsing of main arguments 1970 1971bool Arguments::verify_interval(uintx val, uintx min, 1972 uintx max, const char* name) { 1973 // Returns true iff value is in the inclusive interval [min..max] 1974 // false, otherwise. 1975 if (val >= min && val <= max) { 1976 return true; 1977 } 1978 jio_fprintf(defaultStream::error_stream(), 1979 "%s of " UINTX_FORMAT " is invalid; must be between " UINTX_FORMAT 1980 " and " UINTX_FORMAT "\n", 1981 name, val, min, max); 1982 return false; 1983} 1984 1985bool Arguments::verify_min_value(intx val, intx min, const char* name) { 1986 // Returns true if given value is at least specified min threshold 1987 // false, otherwise. 1988 if (val >= min ) { 1989 return true; 1990 } 1991 jio_fprintf(defaultStream::error_stream(), 1992 "%s of " INTX_FORMAT " is invalid; must be at least " INTX_FORMAT "\n", 1993 name, val, min); 1994 return false; 1995} 1996 1997bool Arguments::verify_percentage(uintx value, const char* name) { 1998 if (is_percentage(value)) { 1999 return true; 2000 } 2001 jio_fprintf(defaultStream::error_stream(), 2002 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", 2003 name, value); 2004 return false; 2005} 2006 2007// check if do gclog rotation 2008// +UseGCLogFileRotation is a must, 2009// no gc log rotation when log file not supplied or 2010// NumberOfGCLogFiles is 0 2011void check_gclog_consistency() { 2012 if (UseGCLogFileRotation) { 2013 if ((Arguments::gc_log_filename() == NULL) || (NumberOfGCLogFiles == 0)) { 2014 jio_fprintf(defaultStream::output_stream(), 2015 "To enable GC log rotation, use -Xloggc:<filename> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files>\n" 2016 "where num_of_file > 0\n" 2017 "GC log rotation is turned off\n"); 2018 UseGCLogFileRotation = false; 2019 } 2020 } 2021 2022 if (UseGCLogFileRotation && (GCLogFileSize != 0) && (GCLogFileSize < 8*K)) { 2023 FLAG_SET_CMDLINE(uintx, GCLogFileSize, 8*K); 2024 jio_fprintf(defaultStream::output_stream(), 2025 "GCLogFileSize changed to minimum 8K\n"); 2026 } 2027} 2028 2029// This function is called for -Xloggc:<filename>, it can be used 2030// to check if a given file name(or string) conforms to the following 2031// specification: 2032// A valid string only contains "[A-Z][a-z][0-9].-_%[p|t]" 2033// %p and %t only allowed once. We only limit usage of filename not path 2034bool is_filename_valid(const char *file_name) { 2035 const char* p = file_name; 2036 char file_sep = os::file_separator()[0]; 2037 const char* cp; 2038 // skip prefix path 2039 for (cp = file_name; *cp != '\0'; cp++) { 2040 if (*cp == '/' || *cp == file_sep) { 2041 p = cp + 1; 2042 } 2043 } 2044 2045 int count_p = 0; 2046 int count_t = 0; 2047 while (*p != '\0') { 2048 if ((*p >= '0' && *p <= '9') || 2049 (*p >= 'A' && *p <= 'Z') || 2050 (*p >= 'a' && *p <= 'z') || 2051 *p == '-' || 2052 *p == '_' || 2053 *p == '.') { 2054 p++; 2055 continue; 2056 } 2057 if (*p == '%') { 2058 if(*(p + 1) == 'p') { 2059 p += 2; 2060 count_p ++; 2061 continue; 2062 } 2063 if (*(p + 1) == 't') { 2064 p += 2; 2065 count_t ++; 2066 continue; 2067 } 2068 } 2069 return false; 2070 } 2071 return count_p < 2 && count_t < 2; 2072} 2073 2074bool Arguments::verify_MinHeapFreeRatio(FormatBuffer<80>& err_msg, uintx min_heap_free_ratio) { 2075 if (!is_percentage(min_heap_free_ratio)) { 2076 err_msg.print("MinHeapFreeRatio must have a value between 0 and 100"); 2077 return false; 2078 } 2079 if (min_heap_free_ratio > MaxHeapFreeRatio) { 2080 err_msg.print("MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " 2081 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")", min_heap_free_ratio, 2082 MaxHeapFreeRatio); 2083 return false; 2084 } 2085 // This does not set the flag itself, but stores the value in a safe place for later usage. 2086 _min_heap_free_ratio = min_heap_free_ratio; 2087 return true; 2088} 2089 2090bool Arguments::verify_MaxHeapFreeRatio(FormatBuffer<80>& err_msg, uintx max_heap_free_ratio) { 2091 if (!is_percentage(max_heap_free_ratio)) { 2092 err_msg.print("MaxHeapFreeRatio must have a value between 0 and 100"); 2093 return false; 2094 } 2095 if (max_heap_free_ratio < MinHeapFreeRatio) { 2096 err_msg.print("MaxHeapFreeRatio (" UINTX_FORMAT ") must be greater than or " 2097 "equal to MinHeapFreeRatio (" UINTX_FORMAT ")", max_heap_free_ratio, 2098 MinHeapFreeRatio); 2099 return false; 2100 } 2101 // This does not set the flag itself, but stores the value in a safe place for later usage. 2102 _max_heap_free_ratio = max_heap_free_ratio; 2103 return true; 2104} 2105 2106// Check consistency of GC selection 2107bool Arguments::check_gc_consistency_user() { 2108 check_gclog_consistency(); 2109 bool status = true; 2110 // Ensure that the user has not selected conflicting sets 2111 // of collectors. [Note: this check is merely a user convenience; 2112 // collectors over-ride each other so that only a non-conflicting 2113 // set is selected; however what the user gets is not what they 2114 // may have expected from the combination they asked for. It's 2115 // better to reduce user confusion by not allowing them to 2116 // select conflicting combinations. 2117 uint i = 0; 2118 if (UseSerialGC) i++; 2119 if (UseConcMarkSweepGC || UseParNewGC) i++; 2120 if (UseParallelGC || UseParallelOldGC) i++; 2121 if (UseG1GC) i++; 2122 if (i > 1) { 2123 jio_fprintf(defaultStream::error_stream(), 2124 "Conflicting collector combinations in option list; " 2125 "please refer to the release notes for the combinations " 2126 "allowed\n"); 2127 status = false; 2128 } 2129 return status; 2130} 2131 2132void Arguments::check_deprecated_gcs() { 2133 if (UseConcMarkSweepGC && !UseParNewGC) { 2134 warning("Using the DefNew young collector with the CMS collector is deprecated " 2135 "and will likely be removed in a future release"); 2136 } 2137 2138 if (UseParNewGC && !UseConcMarkSweepGC) { 2139 // !UseConcMarkSweepGC means that we are using serial old gc. Unfortunately we don't 2140 // set up UseSerialGC properly, so that can't be used in the check here. 2141 warning("Using the ParNew young collector with the Serial old collector is deprecated " 2142 "and will likely be removed in a future release"); 2143 } 2144 2145 if (CMSIncrementalMode) { 2146 warning("Using incremental CMS is deprecated and will likely be removed in a future release"); 2147 } 2148} 2149 2150void Arguments::check_deprecated_gc_flags() { 2151 if (FLAG_IS_CMDLINE(MaxGCMinorPauseMillis)) { 2152 warning("Using MaxGCMinorPauseMillis as minor pause goal is deprecated" 2153 "and will likely be removed in future release"); 2154 } 2155 if (FLAG_IS_CMDLINE(DefaultMaxRAMFraction)) { 2156 warning("DefaultMaxRAMFraction is deprecated and will likely be removed in a future release. " 2157 "Use MaxRAMFraction instead."); 2158 } 2159 if (FLAG_IS_CMDLINE(UseCMSCompactAtFullCollection)) { 2160 warning("UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release."); 2161 } 2162 if (FLAG_IS_CMDLINE(CMSFullGCsBeforeCompaction)) { 2163 warning("CMSFullGCsBeforeCompaction is deprecated and will likely be removed in a future release."); 2164 } 2165 if (FLAG_IS_CMDLINE(UseCMSCollectionPassing)) { 2166 warning("UseCMSCollectionPassing is deprecated and will likely be removed in a future release."); 2167 } 2168} 2169 2170// Check stack pages settings 2171bool Arguments::check_stack_pages() 2172{ 2173 bool status = true; 2174 status = status && verify_min_value(StackYellowPages, 1, "StackYellowPages"); 2175 status = status && verify_min_value(StackRedPages, 1, "StackRedPages"); 2176 // greater stack shadow pages can't generate instruction to bang stack 2177 status = status && verify_interval(StackShadowPages, 1, 50, "StackShadowPages"); 2178 return status; 2179} 2180 2181// Check the consistency of vm_init_args 2182bool Arguments::check_vm_args_consistency() { 2183 // Method for adding checks for flag consistency. 2184 // The intent is to warn the user of all possible conflicts, 2185 // before returning an error. 2186 // Note: Needs platform-dependent factoring. 2187 bool status = true; 2188 2189 if (TLABRefillWasteFraction == 0) { 2190 jio_fprintf(defaultStream::error_stream(), 2191 "TLABRefillWasteFraction should be a denominator, " 2192 "not " SIZE_FORMAT "\n", 2193 TLABRefillWasteFraction); 2194 status = false; 2195 } 2196 2197 status = status && verify_interval(AdaptiveSizePolicyWeight, 0, 100, 2198 "AdaptiveSizePolicyWeight"); 2199 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); 2200 2201 // Divide by bucket size to prevent a large size from causing rollover when 2202 // calculating amount of memory needed to be allocated for the String table. 2203 status = status && verify_interval(StringTableSize, minimumStringTableSize, 2204 (max_uintx / StringTable::bucket_size()), "StringTable size"); 2205 2206 status = status && verify_interval(SymbolTableSize, minimumSymbolTableSize, 2207 (max_uintx / SymbolTable::bucket_size()), "SymbolTable size"); 2208 2209 { 2210 // Using "else if" below to avoid printing two error messages if min > max. 2211 // This will also prevent us from reporting both min>100 and max>100 at the 2212 // same time, but that is less annoying than printing two identical errors IMHO. 2213 FormatBuffer<80> err_msg("%s",""); 2214 if (!verify_MinHeapFreeRatio(err_msg, MinHeapFreeRatio)) { 2215 jio_fprintf(defaultStream::error_stream(), "%s\n", err_msg.buffer()); 2216 status = false; 2217 } else if (!verify_MaxHeapFreeRatio(err_msg, MaxHeapFreeRatio)) { 2218 jio_fprintf(defaultStream::error_stream(), "%s\n", err_msg.buffer()); 2219 status = false; 2220 } 2221 } 2222 2223 // Min/MaxMetaspaceFreeRatio 2224 status = status && verify_percentage(MinMetaspaceFreeRatio, "MinMetaspaceFreeRatio"); 2225 status = status && verify_percentage(MaxMetaspaceFreeRatio, "MaxMetaspaceFreeRatio"); 2226 2227 if (MinMetaspaceFreeRatio > MaxMetaspaceFreeRatio) { 2228 jio_fprintf(defaultStream::error_stream(), 2229 "MinMetaspaceFreeRatio (%s" UINTX_FORMAT ") must be less than or " 2230 "equal to MaxMetaspaceFreeRatio (%s" UINTX_FORMAT ")\n", 2231 FLAG_IS_DEFAULT(MinMetaspaceFreeRatio) ? "Default: " : "", 2232 MinMetaspaceFreeRatio, 2233 FLAG_IS_DEFAULT(MaxMetaspaceFreeRatio) ? "Default: " : "", 2234 MaxMetaspaceFreeRatio); 2235 status = false; 2236 } 2237 2238 // Trying to keep 100% free is not practical 2239 MinMetaspaceFreeRatio = MIN2(MinMetaspaceFreeRatio, (uintx) 99); 2240 2241 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { 2242 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. 2243 } 2244 2245 if (UseParallelOldGC && ParallelOldGCSplitALot) { 2246 // Settings to encourage splitting. 2247 if (!FLAG_IS_CMDLINE(NewRatio)) { 2248 FLAG_SET_CMDLINE(uintx, NewRatio, 2); 2249 } 2250 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) { 2251 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2252 } 2253 } 2254 2255 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) { 2256 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false); 2257 } 2258 2259 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 2260 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); 2261 if (GCTimeLimit == 100) { 2262 // Turn off gc-overhead-limit-exceeded checks 2263 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); 2264 } 2265 2266 status = status && ArgumentsExt::check_gc_consistency_user(); 2267 status = status && check_stack_pages(); 2268 2269 if (CMSIncrementalMode) { 2270 if (!UseConcMarkSweepGC) { 2271 jio_fprintf(defaultStream::error_stream(), 2272 "error: invalid argument combination.\n" 2273 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " 2274 "selected in order\nto use CMSIncrementalMode.\n"); 2275 status = false; 2276 } else { 2277 status = status && verify_percentage(CMSIncrementalDutyCycle, 2278 "CMSIncrementalDutyCycle"); 2279 status = status && verify_percentage(CMSIncrementalDutyCycleMin, 2280 "CMSIncrementalDutyCycleMin"); 2281 status = status && verify_percentage(CMSIncrementalSafetyFactor, 2282 "CMSIncrementalSafetyFactor"); 2283 status = status && verify_percentage(CMSIncrementalOffset, 2284 "CMSIncrementalOffset"); 2285 status = status && verify_percentage(CMSExpAvgFactor, 2286 "CMSExpAvgFactor"); 2287 // If it was not set on the command line, set 2288 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. 2289 if (CMSInitiatingOccupancyFraction < 0) { 2290 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); 2291 } 2292 } 2293 } 2294 2295 // CMS space iteration, which FLSVerifyAllHeapreferences entails, 2296 // insists that we hold the requisite locks so that the iteration is 2297 // MT-safe. For the verification at start-up and shut-down, we don't 2298 // yet have a good way of acquiring and releasing these locks, 2299 // which are not visible at the CollectedHeap level. We want to 2300 // be able to acquire these locks and then do the iteration rather 2301 // than just disable the lock verification. This will be fixed under 2302 // bug 4788986. 2303 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { 2304 if (VerifyDuringStartup) { 2305 warning("Heap verification at start-up disabled " 2306 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 2307 VerifyDuringStartup = false; // Disable verification at start-up 2308 } 2309 2310 if (VerifyBeforeExit) { 2311 warning("Heap verification at shutdown disabled " 2312 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 2313 VerifyBeforeExit = false; // Disable verification at shutdown 2314 } 2315 } 2316 2317 // Note: only executed in non-PRODUCT mode 2318 if (!UseAsyncConcMarkSweepGC && 2319 (ExplicitGCInvokesConcurrent || 2320 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { 2321 jio_fprintf(defaultStream::error_stream(), 2322 "error: +ExplicitGCInvokesConcurrent[AndUnloadsClasses] conflicts" 2323 " with -UseAsyncConcMarkSweepGC"); 2324 status = false; 2325 } 2326 2327 status = status && verify_min_value(ParGCArrayScanChunk, 1, "ParGCArrayScanChunk"); 2328 2329#if INCLUDE_ALL_GCS 2330 if (UseG1GC) { 2331 status = status && verify_percentage(G1NewSizePercent, "G1NewSizePercent"); 2332 status = status && verify_percentage(G1MaxNewSizePercent, "G1MaxNewSizePercent"); 2333 status = status && verify_interval(G1NewSizePercent, 0, G1MaxNewSizePercent, "G1NewSizePercent"); 2334 2335 status = status && verify_percentage(InitiatingHeapOccupancyPercent, 2336 "InitiatingHeapOccupancyPercent"); 2337 status = status && verify_min_value(G1RefProcDrainInterval, 1, 2338 "G1RefProcDrainInterval"); 2339 status = status && verify_min_value((intx)G1ConcMarkStepDurationMillis, 1, 2340 "G1ConcMarkStepDurationMillis"); 2341 status = status && verify_interval(G1ConcRSHotCardLimit, 0, max_jubyte, 2342 "G1ConcRSHotCardLimit"); 2343 status = status && verify_interval(G1ConcRSLogCacheSize, 0, 31, 2344 "G1ConcRSLogCacheSize"); 2345 status = status && verify_interval(StringDeduplicationAgeThreshold, 1, markOopDesc::max_age, 2346 "StringDeduplicationAgeThreshold"); 2347 } 2348 if (UseConcMarkSweepGC) { 2349 status = status && verify_min_value(CMSOldPLABNumRefills, 1, "CMSOldPLABNumRefills"); 2350 status = status && verify_min_value(CMSOldPLABToleranceFactor, 1, "CMSOldPLABToleranceFactor"); 2351 status = status && verify_min_value(CMSOldPLABMax, 1, "CMSOldPLABMax"); 2352 status = status && verify_interval(CMSOldPLABMin, 1, CMSOldPLABMax, "CMSOldPLABMin"); 2353 2354 status = status && verify_min_value(CMSYoungGenPerWorker, 1, "CMSYoungGenPerWorker"); 2355 2356 status = status && verify_min_value(CMSSamplingGrain, 1, "CMSSamplingGrain"); 2357 status = status && verify_interval(CMS_SweepWeight, 0, 100, "CMS_SweepWeight"); 2358 status = status && verify_interval(CMS_FLSWeight, 0, 100, "CMS_FLSWeight"); 2359 2360 status = status && verify_interval(FLSCoalescePolicy, 0, 4, "FLSCoalescePolicy"); 2361 2362 status = status && verify_min_value(CMSRescanMultiple, 1, "CMSRescanMultiple"); 2363 status = status && verify_min_value(CMSConcMarkMultiple, 1, "CMSConcMarkMultiple"); 2364 2365 status = status && verify_interval(CMSPrecleanIter, 0, 9, "CMSPrecleanIter"); 2366 status = status && verify_min_value(CMSPrecleanDenominator, 1, "CMSPrecleanDenominator"); 2367 status = status && verify_interval(CMSPrecleanNumerator, 0, CMSPrecleanDenominator - 1, "CMSPrecleanNumerator"); 2368 2369 status = status && verify_percentage(CMSBootstrapOccupancy, "CMSBootstrapOccupancy"); 2370 2371 status = status && verify_min_value(CMSPrecleanThreshold, 100, "CMSPrecleanThreshold"); 2372 2373 status = status && verify_percentage(CMSScheduleRemarkEdenPenetration, "CMSScheduleRemarkEdenPenetration"); 2374 status = status && verify_min_value(CMSScheduleRemarkSamplingRatio, 1, "CMSScheduleRemarkSamplingRatio"); 2375 status = status && verify_min_value(CMSBitMapYieldQuantum, 1, "CMSBitMapYieldQuantum"); 2376 status = status && verify_percentage(CMSTriggerRatio, "CMSTriggerRatio"); 2377 status = status && verify_percentage(CMSIsTooFullPercentage, "CMSIsTooFullPercentage"); 2378 } 2379 2380 if (UseParallelGC || UseParallelOldGC) { 2381 status = status && verify_interval(ParallelOldDeadWoodLimiterMean, 0, 100, "ParallelOldDeadWoodLimiterMean"); 2382 status = status && verify_interval(ParallelOldDeadWoodLimiterStdDev, 0, 100, "ParallelOldDeadWoodLimiterStdDev"); 2383 2384 status = status && verify_percentage(YoungGenerationSizeIncrement, "YoungGenerationSizeIncrement"); 2385 status = status && verify_percentage(TenuredGenerationSizeIncrement, "TenuredGenerationSizeIncrement"); 2386 2387 status = status && verify_min_value(YoungGenerationSizeSupplementDecay, 1, "YoungGenerationSizeSupplementDecay"); 2388 status = status && verify_min_value(TenuredGenerationSizeSupplementDecay, 1, "TenuredGenerationSizeSupplementDecay"); 2389 2390 status = status && verify_min_value(ParGCCardsPerStrideChunk, 1, "ParGCCardsPerStrideChunk"); 2391 2392 status = status && verify_min_value(ParallelOldGCSplitInterval, 0, "ParallelOldGCSplitInterval"); 2393 } 2394#endif // INCLUDE_ALL_GCS 2395 2396 status = status && verify_interval(RefDiscoveryPolicy, 2397 ReferenceProcessor::DiscoveryPolicyMin, 2398 ReferenceProcessor::DiscoveryPolicyMax, 2399 "RefDiscoveryPolicy"); 2400 2401 // Limit the lower bound of this flag to 1 as it is used in a division 2402 // expression. 2403 status = status && verify_interval(TLABWasteTargetPercent, 2404 1, 100, "TLABWasteTargetPercent"); 2405 2406 status = status && verify_object_alignment(); 2407 2408 status = status && verify_interval(CompressedClassSpaceSize, 1*M, 3*G, 2409 "CompressedClassSpaceSize"); 2410 2411 status = status && verify_interval(MarkStackSizeMax, 2412 1, (max_jint - 1), "MarkStackSizeMax"); 2413 status = status && verify_interval(NUMAChunkResizeWeight, 0, 100, "NUMAChunkResizeWeight"); 2414 2415 status = status && verify_min_value(LogEventsBufferEntries, 1, "LogEventsBufferEntries"); 2416 2417 status = status && verify_min_value(HeapSizePerGCThread, (uintx) os::vm_page_size(), "HeapSizePerGCThread"); 2418 2419 status = status && verify_min_value(GCTaskTimeStampEntries, 1, "GCTaskTimeStampEntries"); 2420 2421 status = status && verify_percentage(ParallelGCBufferWastePct, "ParallelGCBufferWastePct"); 2422 status = status && verify_interval(TargetPLABWastePct, 1, 100, "TargetPLABWastePct"); 2423 2424 status = status && verify_min_value(ParGCStridesPerThread, 1, "ParGCStridesPerThread"); 2425 2426 status = status && verify_min_value(MinRAMFraction, 1, "MinRAMFraction"); 2427 status = status && verify_min_value(InitialRAMFraction, 1, "InitialRAMFraction"); 2428 status = status && verify_min_value(MaxRAMFraction, 1, "MaxRAMFraction"); 2429 status = status && verify_min_value(DefaultMaxRAMFraction, 1, "DefaultMaxRAMFraction"); 2430 2431 status = status && verify_interval(AdaptiveTimeWeight, 0, 100, "AdaptiveTimeWeight"); 2432 status = status && verify_min_value(AdaptiveSizeDecrementScaleFactor, 1, "AdaptiveSizeDecrementScaleFactor"); 2433 2434 status = status && verify_interval(TLABAllocationWeight, 0, 100, "TLABAllocationWeight"); 2435 status = status && verify_min_value(MinTLABSize, 1, "MinTLABSize"); 2436 status = status && verify_min_value(TLABRefillWasteFraction, 1, "TLABRefillWasteFraction"); 2437 2438 status = status && verify_percentage(YoungGenerationSizeSupplement, "YoungGenerationSizeSupplement"); 2439 status = status && verify_percentage(TenuredGenerationSizeSupplement, "TenuredGenerationSizeSupplement"); 2440 2441 status = status && verify_interval(MaxTenuringThreshold, 0, markOopDesc::max_age + 1, "MaxTenuringThreshold"); 2442 status = status && verify_interval(InitialTenuringThreshold, 0, MaxTenuringThreshold, "InitialTenuringThreshold"); 2443 status = status && verify_percentage(TargetSurvivorRatio, "TargetSurvivorRatio"); 2444 status = status && verify_percentage(MarkSweepDeadRatio, "MarkSweepDeadRatio"); 2445 2446 status = status && verify_min_value(MarkSweepAlwaysCompactCount, 1, "MarkSweepAlwaysCompactCount"); 2447#ifdef COMPILER1 2448 status = status && verify_min_value(ValueMapInitialSize, 1, "ValueMapInitialSize"); 2449#endif 2450 2451 if (PrintNMTStatistics) { 2452#if INCLUDE_NMT 2453 if (MemTracker::tracking_level() == NMT_off) { 2454#endif // INCLUDE_NMT 2455 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled"); 2456 PrintNMTStatistics = false; 2457#if INCLUDE_NMT 2458 } 2459#endif 2460 } 2461 2462 // Need to limit the extent of the padding to reasonable size. 2463 // 8K is well beyond the reasonable HW cache line size, even with the 2464 // aggressive prefetching, while still leaving the room for segregating 2465 // among the distinct pages. 2466 if (ContendedPaddingWidth < 0 || ContendedPaddingWidth > 8192) { 2467 jio_fprintf(defaultStream::error_stream(), 2468 "ContendedPaddingWidth=" INTX_FORMAT " must be in between %d and %d\n", 2469 ContendedPaddingWidth, 0, 8192); 2470 status = false; 2471 } 2472 2473 // Need to enforce the padding not to break the existing field alignments. 2474 // It is sufficient to check against the largest type size. 2475 if ((ContendedPaddingWidth % BytesPerLong) != 0) { 2476 jio_fprintf(defaultStream::error_stream(), 2477 "ContendedPaddingWidth=" INTX_FORMAT " must be a multiple of %d\n", 2478 ContendedPaddingWidth, BytesPerLong); 2479 status = false; 2480 } 2481 2482 // Check lower bounds of the code cache 2483 // Template Interpreter code is approximately 3X larger in debug builds. 2484 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3); 2485 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) { 2486 jio_fprintf(defaultStream::error_stream(), 2487 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K, 2488 os::vm_page_size()/K); 2489 status = false; 2490 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) { 2491 jio_fprintf(defaultStream::error_stream(), 2492 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n", 2493 ReservedCodeCacheSize/K, InitialCodeCacheSize/K); 2494 status = false; 2495 } else if (ReservedCodeCacheSize < min_code_cache_size) { 2496 jio_fprintf(defaultStream::error_stream(), 2497 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K, 2498 min_code_cache_size/K); 2499 status = false; 2500 } else if (ReservedCodeCacheSize > 2*G) { 2501 // Code cache size larger than MAXINT is not supported. 2502 jio_fprintf(defaultStream::error_stream(), 2503 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M, 2504 (2*G)/M); 2505 status = false; 2506 } else if (NonNMethodCodeHeapSize < min_code_cache_size){ 2507 jio_fprintf(defaultStream::error_stream(), 2508 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K, 2509 min_code_cache_size/K); 2510 status = false; 2511 } else if ((!FLAG_IS_DEFAULT(NonNMethodCodeHeapSize) || !FLAG_IS_DEFAULT(ProfiledCodeHeapSize) || !FLAG_IS_DEFAULT(NonProfiledCodeHeapSize)) 2512 && (NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) { 2513 jio_fprintf(defaultStream::error_stream(), 2514 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n", 2515 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K, 2516 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K); 2517 status = false; 2518 } 2519 2520 status &= verify_interval(NmethodSweepActivity, 0, 2000, "NmethodSweepActivity"); 2521 status &= verify_interval(CodeCacheMinBlockLength, 1, 100, "CodeCacheMinBlockLength"); 2522 status &= verify_interval(CodeCacheSegmentSize, 1, 1024, "CodeCacheSegmentSize"); 2523 status &= verify_interval(StartAggressiveSweepingAt, 0, 100, "StartAggressiveSweepingAt"); 2524 2525 2526 int min_number_of_compiler_threads = get_min_number_of_compiler_threads(); 2527 // The default CICompilerCount's value is CI_COMPILER_COUNT. 2528 assert(min_number_of_compiler_threads <= CI_COMPILER_COUNT, "minimum should be less or equal default number"); 2529 // Check the minimum number of compiler threads 2530 status &=verify_min_value(CICompilerCount, min_number_of_compiler_threads, "CICompilerCount"); 2531 2532 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) { 2533 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount."); 2534 } 2535 2536 return status; 2537} 2538 2539bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 2540 const char* option_type) { 2541 if (ignore) return false; 2542 2543 const char* spacer = " "; 2544 if (option_type == NULL) { 2545 option_type = ++spacer; // Set both to the empty string. 2546 } 2547 2548 if (os::obsolete_option(option)) { 2549 jio_fprintf(defaultStream::error_stream(), 2550 "Obsolete %s%soption: %s\n", option_type, spacer, 2551 option->optionString); 2552 return false; 2553 } else { 2554 jio_fprintf(defaultStream::error_stream(), 2555 "Unrecognized %s%soption: %s\n", option_type, spacer, 2556 option->optionString); 2557 return true; 2558 } 2559} 2560 2561static const char* user_assertion_options[] = { 2562 "-da", "-ea", "-disableassertions", "-enableassertions", 0 2563}; 2564 2565static const char* system_assertion_options[] = { 2566 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 2567}; 2568 2569// Return true if any of the strings in null-terminated array 'names' matches. 2570// If tail_allowed is true, then the tail must begin with a colon; otherwise, 2571// the option must match exactly. 2572static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 2573 bool tail_allowed) { 2574 for (/* empty */; *names != NULL; ++names) { 2575 if (match_option(option, *names, tail)) { 2576 if (**tail == '\0' || tail_allowed && **tail == ':') { 2577 return true; 2578 } 2579 } 2580 } 2581 return false; 2582} 2583 2584bool Arguments::parse_uintx(const char* value, 2585 uintx* uintx_arg, 2586 uintx min_size) { 2587 2588 // Check the sign first since atomull() parses only unsigned values. 2589 bool value_is_positive = !(*value == '-'); 2590 2591 if (value_is_positive) { 2592 julong n; 2593 bool good_return = atomull(value, &n); 2594 if (good_return) { 2595 bool above_minimum = n >= min_size; 2596 bool value_is_too_large = n > max_uintx; 2597 2598 if (above_minimum && !value_is_too_large) { 2599 *uintx_arg = n; 2600 return true; 2601 } 2602 } 2603 } 2604 return false; 2605} 2606 2607Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 2608 julong* long_arg, 2609 julong min_size) { 2610 if (!atomull(s, long_arg)) return arg_unreadable; 2611 return check_memory_size(*long_arg, min_size); 2612} 2613 2614// Parse JavaVMInitArgs structure 2615 2616jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { 2617 // For components of the system classpath. 2618 SysClassPath scp(Arguments::get_sysclasspath()); 2619 bool scp_assembly_required = false; 2620 2621 // Save default settings for some mode flags 2622 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 2623 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 2624 Arguments::_ClipInlining = ClipInlining; 2625 Arguments::_BackgroundCompilation = BackgroundCompilation; 2626 2627 // Setup flags for mixed which is the default 2628 set_mode_flags(_mixed); 2629 2630 // Parse JAVA_TOOL_OPTIONS environment variable (if present) 2631 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); 2632 if (result != JNI_OK) { 2633 return result; 2634 } 2635 2636 // Parse JavaVMInitArgs structure passed in 2637 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, Flag::COMMAND_LINE); 2638 if (result != JNI_OK) { 2639 return result; 2640 } 2641 2642 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) 2643 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); 2644 if (result != JNI_OK) { 2645 return result; 2646 } 2647 2648 // Do final processing now that all arguments have been parsed 2649 result = finalize_vm_init_args(&scp, scp_assembly_required); 2650 if (result != JNI_OK) { 2651 return result; 2652 } 2653 2654 return JNI_OK; 2655} 2656 2657// Checks if name in command-line argument -agent{lib,path}:name[=options] 2658// represents a valid HPROF of JDWP agent. is_path==true denotes that we 2659// are dealing with -agentpath (case where name is a path), otherwise with 2660// -agentlib 2661bool valid_hprof_or_jdwp_agent(char *name, bool is_path) { 2662 char *_name; 2663 const char *_hprof = "hprof", *_jdwp = "jdwp"; 2664 size_t _len_hprof, _len_jdwp, _len_prefix; 2665 2666 if (is_path) { 2667 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) { 2668 return false; 2669 } 2670 2671 _name++; // skip past last path separator 2672 _len_prefix = strlen(JNI_LIB_PREFIX); 2673 2674 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) { 2675 return false; 2676 } 2677 2678 _name += _len_prefix; 2679 _len_hprof = strlen(_hprof); 2680 _len_jdwp = strlen(_jdwp); 2681 2682 if (strncmp(_name, _hprof, _len_hprof) == 0) { 2683 _name += _len_hprof; 2684 } 2685 else if (strncmp(_name, _jdwp, _len_jdwp) == 0) { 2686 _name += _len_jdwp; 2687 } 2688 else { 2689 return false; 2690 } 2691 2692 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) { 2693 return false; 2694 } 2695 2696 return true; 2697 } 2698 2699 if (strcmp(name, _hprof) == 0 || strcmp(name, _jdwp) == 0) { 2700 return true; 2701 } 2702 2703 return false; 2704} 2705 2706jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, 2707 SysClassPath* scp_p, 2708 bool* scp_assembly_required_p, 2709 Flag::Flags origin) { 2710 // Remaining part of option string 2711 const char* tail; 2712 2713 // iterate over arguments 2714 for (int index = 0; index < args->nOptions; index++) { 2715 bool is_absolute_path = false; // for -agentpath vs -agentlib 2716 2717 const JavaVMOption* option = args->options + index; 2718 2719 if (!match_option(option, "-Djava.class.path", &tail) && 2720 !match_option(option, "-Dsun.java.command", &tail) && 2721 !match_option(option, "-Dsun.java.launcher", &tail)) { 2722 2723 // add all jvm options to the jvm_args string. This string 2724 // is used later to set the java.vm.args PerfData string constant. 2725 // the -Djava.class.path and the -Dsun.java.command options are 2726 // omitted from jvm_args string as each have their own PerfData 2727 // string constant object. 2728 build_jvm_args(option->optionString); 2729 } 2730 2731 // -verbose:[class/gc/jni] 2732 if (match_option(option, "-verbose", &tail)) { 2733 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 2734 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); 2735 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 2736 } else if (!strcmp(tail, ":gc")) { 2737 FLAG_SET_CMDLINE(bool, PrintGC, true); 2738 } else if (!strcmp(tail, ":jni")) { 2739 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); 2740 } 2741 // -da / -ea / -disableassertions / -enableassertions 2742 // These accept an optional class/package name separated by a colon, e.g., 2743 // -da:java.lang.Thread. 2744 } else if (match_option(option, user_assertion_options, &tail, true)) { 2745 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2746 if (*tail == '\0') { 2747 JavaAssertions::setUserClassDefault(enable); 2748 } else { 2749 assert(*tail == ':', "bogus match by match_option()"); 2750 JavaAssertions::addOption(tail + 1, enable); 2751 } 2752 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 2753 } else if (match_option(option, system_assertion_options, &tail, false)) { 2754 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2755 JavaAssertions::setSystemClassDefault(enable); 2756 // -bootclasspath: 2757 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 2758 scp_p->reset_path(tail); 2759 *scp_assembly_required_p = true; 2760 // -bootclasspath/a: 2761 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 2762 scp_p->add_suffix(tail); 2763 *scp_assembly_required_p = true; 2764 // -bootclasspath/p: 2765 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 2766 scp_p->add_prefix(tail); 2767 *scp_assembly_required_p = true; 2768 // -Xrun 2769 } else if (match_option(option, "-Xrun", &tail)) { 2770 if (tail != NULL) { 2771 const char* pos = strchr(tail, ':'); 2772 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2773 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len); 2774 name[len] = '\0'; 2775 2776 char *options = NULL; 2777 if(pos != NULL) { 2778 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 2779 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), pos+1, len2); 2780 } 2781#if !INCLUDE_JVMTI 2782 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 2783 jio_fprintf(defaultStream::error_stream(), 2784 "Profiling and debugging agents are not supported in this VM\n"); 2785 return JNI_ERR; 2786 } 2787#endif // !INCLUDE_JVMTI 2788 add_init_library(name, options); 2789 } 2790 // -agentlib and -agentpath 2791 } else if (match_option(option, "-agentlib:", &tail) || 2792 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 2793 if(tail != NULL) { 2794 const char* pos = strchr(tail, '='); 2795 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2796 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len); 2797 name[len] = '\0'; 2798 2799 char *options = NULL; 2800 if(pos != NULL) { 2801 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1, mtInternal), pos + 1); 2802 } 2803#if !INCLUDE_JVMTI 2804 if (valid_hprof_or_jdwp_agent(name, is_absolute_path)) { 2805 jio_fprintf(defaultStream::error_stream(), 2806 "Profiling and debugging agents are not supported in this VM\n"); 2807 return JNI_ERR; 2808 } 2809#endif // !INCLUDE_JVMTI 2810 add_init_agent(name, options, is_absolute_path); 2811 } 2812 // -javaagent 2813 } else if (match_option(option, "-javaagent:", &tail)) { 2814#if !INCLUDE_JVMTI 2815 jio_fprintf(defaultStream::error_stream(), 2816 "Instrumentation agents are not supported in this VM\n"); 2817 return JNI_ERR; 2818#else 2819 if(tail != NULL) { 2820 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail); 2821 add_init_agent("instrument", options, false); 2822 } 2823#endif // !INCLUDE_JVMTI 2824 // -Xnoclassgc 2825 } else if (match_option(option, "-Xnoclassgc", &tail)) { 2826 FLAG_SET_CMDLINE(bool, ClassUnloading, false); 2827 // -Xincgc: i-CMS 2828 } else if (match_option(option, "-Xincgc", &tail)) { 2829 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 2830 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); 2831 // -Xnoincgc: no i-CMS 2832 } else if (match_option(option, "-Xnoincgc", &tail)) { 2833 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 2834 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); 2835 // -Xconcgc 2836 } else if (match_option(option, "-Xconcgc", &tail)) { 2837 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 2838 // -Xnoconcgc 2839 } else if (match_option(option, "-Xnoconcgc", &tail)) { 2840 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 2841 // -Xbatch 2842 } else if (match_option(option, "-Xbatch", &tail)) { 2843 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 2844 // -Xmn for compatibility with other JVM vendors 2845 } else if (match_option(option, "-Xmn", &tail)) { 2846 julong long_initial_young_size = 0; 2847 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1); 2848 if (errcode != arg_in_range) { 2849 jio_fprintf(defaultStream::error_stream(), 2850 "Invalid initial young generation size: %s\n", option->optionString); 2851 describe_range_error(errcode); 2852 return JNI_EINVAL; 2853 } 2854 FLAG_SET_CMDLINE(uintx, MaxNewSize, (uintx)long_initial_young_size); 2855 FLAG_SET_CMDLINE(uintx, NewSize, (uintx)long_initial_young_size); 2856 // -Xms 2857 } else if (match_option(option, "-Xms", &tail)) { 2858 julong long_initial_heap_size = 0; 2859 // an initial heap size of 0 means automatically determine 2860 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0); 2861 if (errcode != arg_in_range) { 2862 jio_fprintf(defaultStream::error_stream(), 2863 "Invalid initial heap size: %s\n", option->optionString); 2864 describe_range_error(errcode); 2865 return JNI_EINVAL; 2866 } 2867 set_min_heap_size((uintx)long_initial_heap_size); 2868 // Currently the minimum size and the initial heap sizes are the same. 2869 // Can be overridden with -XX:InitialHeapSize. 2870 FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size); 2871 // -Xmx 2872 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) { 2873 julong long_max_heap_size = 0; 2874 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 2875 if (errcode != arg_in_range) { 2876 jio_fprintf(defaultStream::error_stream(), 2877 "Invalid maximum heap size: %s\n", option->optionString); 2878 describe_range_error(errcode); 2879 return JNI_EINVAL; 2880 } 2881 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (uintx)long_max_heap_size); 2882 // Xmaxf 2883 } else if (match_option(option, "-Xmaxf", &tail)) { 2884 char* err; 2885 int maxf = (int)(strtod(tail, &err) * 100); 2886 if (*err != '\0' || *tail == '\0' || maxf < 0 || maxf > 100) { 2887 jio_fprintf(defaultStream::error_stream(), 2888 "Bad max heap free percentage size: %s\n", 2889 option->optionString); 2890 return JNI_EINVAL; 2891 } else { 2892 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); 2893 } 2894 // Xminf 2895 } else if (match_option(option, "-Xminf", &tail)) { 2896 char* err; 2897 int minf = (int)(strtod(tail, &err) * 100); 2898 if (*err != '\0' || *tail == '\0' || minf < 0 || minf > 100) { 2899 jio_fprintf(defaultStream::error_stream(), 2900 "Bad min heap free percentage size: %s\n", 2901 option->optionString); 2902 return JNI_EINVAL; 2903 } else { 2904 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); 2905 } 2906 // -Xss 2907 } else if (match_option(option, "-Xss", &tail)) { 2908 julong long_ThreadStackSize = 0; 2909 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); 2910 if (errcode != arg_in_range) { 2911 jio_fprintf(defaultStream::error_stream(), 2912 "Invalid thread stack size: %s\n", option->optionString); 2913 describe_range_error(errcode); 2914 return JNI_EINVAL; 2915 } 2916 // Internally track ThreadStackSize in units of 1024 bytes. 2917 FLAG_SET_CMDLINE(intx, ThreadStackSize, 2918 round_to((int)long_ThreadStackSize, K) / K); 2919 // -Xoss 2920 } else if (match_option(option, "-Xoss", &tail)) { 2921 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility 2922 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) { 2923 julong long_CodeCacheExpansionSize = 0; 2924 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size()); 2925 if (errcode != arg_in_range) { 2926 jio_fprintf(defaultStream::error_stream(), 2927 "Invalid argument: %s. Must be at least %luK.\n", option->optionString, 2928 os::vm_page_size()/K); 2929 return JNI_EINVAL; 2930 } 2931 FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize); 2932 } else if (match_option(option, "-Xmaxjitcodesize", &tail) || 2933 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) { 2934 julong long_ReservedCodeCacheSize = 0; 2935 2936 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1); 2937 if (errcode != arg_in_range) { 2938 jio_fprintf(defaultStream::error_stream(), 2939 "Invalid maximum code cache size: %s.\n", option->optionString); 2940 return JNI_EINVAL; 2941 } 2942 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); 2943 // -XX:NonNMethodCodeHeapSize= 2944 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) { 2945 julong long_NonNMethodCodeHeapSize = 0; 2946 2947 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1); 2948 if (errcode != arg_in_range) { 2949 jio_fprintf(defaultStream::error_stream(), 2950 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString); 2951 return JNI_EINVAL; 2952 } 2953 FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize); 2954 // -XX:ProfiledCodeHeapSize= 2955 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) { 2956 julong long_ProfiledCodeHeapSize = 0; 2957 2958 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1); 2959 if (errcode != arg_in_range) { 2960 jio_fprintf(defaultStream::error_stream(), 2961 "Invalid maximum profiled code heap size: %s.\n", option->optionString); 2962 return JNI_EINVAL; 2963 } 2964 FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize); 2965 // -XX:NonProfiledCodeHeapSizee= 2966 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) { 2967 julong long_NonProfiledCodeHeapSize = 0; 2968 2969 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1); 2970 if (errcode != arg_in_range) { 2971 jio_fprintf(defaultStream::error_stream(), 2972 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString); 2973 return JNI_EINVAL; 2974 } 2975 FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize); 2976 //-XX:IncreaseFirstTierCompileThresholdAt= 2977 } else if (match_option(option, "-XX:IncreaseFirstTierCompileThresholdAt=", &tail)) { 2978 uintx uint_IncreaseFirstTierCompileThresholdAt = 0; 2979 if (!parse_uintx(tail, &uint_IncreaseFirstTierCompileThresholdAt, 0) || uint_IncreaseFirstTierCompileThresholdAt > 99) { 2980 jio_fprintf(defaultStream::error_stream(), 2981 "Invalid value for IncreaseFirstTierCompileThresholdAt: %s. Should be between 0 and 99.\n", 2982 option->optionString); 2983 return JNI_EINVAL; 2984 } 2985 FLAG_SET_CMDLINE(uintx, IncreaseFirstTierCompileThresholdAt, (uintx)uint_IncreaseFirstTierCompileThresholdAt); 2986 // -green 2987 } else if (match_option(option, "-green", &tail)) { 2988 jio_fprintf(defaultStream::error_stream(), 2989 "Green threads support not available\n"); 2990 return JNI_EINVAL; 2991 // -native 2992 } else if (match_option(option, "-native", &tail)) { 2993 // HotSpot always uses native threads, ignore silently for compatibility 2994 // -Xsqnopause 2995 } else if (match_option(option, "-Xsqnopause", &tail)) { 2996 // EVM option, ignore silently for compatibility 2997 // -Xrs 2998 } else if (match_option(option, "-Xrs", &tail)) { 2999 // Classic/EVM option, new functionality 3000 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); 3001 } else if (match_option(option, "-Xusealtsigs", &tail)) { 3002 // change default internal VM signals used - lower case for back compat 3003 FLAG_SET_CMDLINE(bool, UseAltSigs, true); 3004 // -Xoptimize 3005 } else if (match_option(option, "-Xoptimize", &tail)) { 3006 // EVM option, ignore silently for compatibility 3007 // -Xprof 3008 } else if (match_option(option, "-Xprof", &tail)) { 3009#if INCLUDE_FPROF 3010 _has_profile = true; 3011#else // INCLUDE_FPROF 3012 jio_fprintf(defaultStream::error_stream(), 3013 "Flat profiling is not supported in this VM.\n"); 3014 return JNI_ERR; 3015#endif // INCLUDE_FPROF 3016 // -Xconcurrentio 3017 } else if (match_option(option, "-Xconcurrentio", &tail)) { 3018 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); 3019 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 3020 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); 3021 FLAG_SET_CMDLINE(bool, UseTLAB, false); 3022 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation 3023 3024 // -Xinternalversion 3025 } else if (match_option(option, "-Xinternalversion", &tail)) { 3026 jio_fprintf(defaultStream::output_stream(), "%s\n", 3027 VM_Version::internal_vm_info_string()); 3028 vm_exit(0); 3029#ifndef PRODUCT 3030 // -Xprintflags 3031 } else if (match_option(option, "-Xprintflags", &tail)) { 3032 CommandLineFlags::printFlags(tty, false); 3033 vm_exit(0); 3034#endif 3035 // -D 3036 } else if (match_option(option, "-D", &tail)) { 3037 if (match_option(option, "-Djava.endorsed.dirs=", &tail)) { 3038 // abort if -Djava.endorsed.dirs is set 3039 jio_fprintf(defaultStream::output_stream(), 3040 "-Djava.endorsed.dirs is not supported. Endorsed standards and standalone APIs\n" 3041 "in modular form will be supported via the concept of upgradeable modules.\n"); 3042 return JNI_EINVAL; 3043 } 3044 if (match_option(option, "-Djava.ext.dirs=", &tail)) { 3045 // abort if -Djava.ext.dirs is set 3046 jio_fprintf(defaultStream::output_stream(), 3047 "-Djava.ext.dirs is not supported. Use -classpath instead.\n"); 3048 return JNI_EINVAL; 3049 } 3050 3051 if (!add_property(tail)) { 3052 return JNI_ENOMEM; 3053 } 3054 // Out of the box management support 3055 if (match_option(option, "-Dcom.sun.management", &tail)) { 3056#if INCLUDE_MANAGEMENT 3057 FLAG_SET_CMDLINE(bool, ManagementServer, true); 3058#else 3059 jio_fprintf(defaultStream::output_stream(), 3060 "-Dcom.sun.management is not supported in this VM.\n"); 3061 return JNI_ERR; 3062#endif 3063 } 3064 // -Xint 3065 } else if (match_option(option, "-Xint", &tail)) { 3066 set_mode_flags(_int); 3067 // -Xmixed 3068 } else if (match_option(option, "-Xmixed", &tail)) { 3069 set_mode_flags(_mixed); 3070 // -Xcomp 3071 } else if (match_option(option, "-Xcomp", &tail)) { 3072 // for testing the compiler; turn off all flags that inhibit compilation 3073 set_mode_flags(_comp); 3074 // -Xshare:dump 3075 } else if (match_option(option, "-Xshare:dump", &tail)) { 3076 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 3077 set_mode_flags(_int); // Prevent compilation, which creates objects 3078 // -Xshare:on 3079 } else if (match_option(option, "-Xshare:on", &tail)) { 3080 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 3081 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); 3082 // -Xshare:auto 3083 } else if (match_option(option, "-Xshare:auto", &tail)) { 3084 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 3085 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 3086 // -Xshare:off 3087 } else if (match_option(option, "-Xshare:off", &tail)) { 3088 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); 3089 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 3090 // -Xverify 3091 } else if (match_option(option, "-Xverify", &tail)) { 3092 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 3093 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); 3094 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 3095 } else if (strcmp(tail, ":remote") == 0) { 3096 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 3097 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 3098 } else if (strcmp(tail, ":none") == 0) { 3099 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 3100 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); 3101 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 3102 return JNI_EINVAL; 3103 } 3104 // -Xdebug 3105 } else if (match_option(option, "-Xdebug", &tail)) { 3106 // note this flag has been used, then ignore 3107 set_xdebug_mode(true); 3108 // -Xnoagent 3109 } else if (match_option(option, "-Xnoagent", &tail)) { 3110 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 3111 } else if (match_option(option, "-Xboundthreads", &tail)) { 3112 // Bind user level threads to kernel threads (Solaris only) 3113 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); 3114 } else if (match_option(option, "-Xloggc:", &tail)) { 3115 // Redirect GC output to the file. -Xloggc:<filename> 3116 // ostream_init_log(), when called will use this filename 3117 // to initialize a fileStream. 3118 _gc_log_filename = os::strdup_check_oom(tail); 3119 if (!is_filename_valid(_gc_log_filename)) { 3120 jio_fprintf(defaultStream::output_stream(), 3121 "Invalid file name for use with -Xloggc: Filename can only contain the " 3122 "characters [A-Z][a-z][0-9]-_.%%[p|t] but it has been %s\n" 3123 "Note %%p or %%t can only be used once\n", _gc_log_filename); 3124 return JNI_EINVAL; 3125 } 3126 FLAG_SET_CMDLINE(bool, PrintGC, true); 3127 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); 3128 3129 // JNI hooks 3130 } else if (match_option(option, "-Xcheck", &tail)) { 3131 if (!strcmp(tail, ":jni")) { 3132#if !INCLUDE_JNI_CHECK 3133 warning("JNI CHECKING is not supported in this VM"); 3134#else 3135 CheckJNICalls = true; 3136#endif // INCLUDE_JNI_CHECK 3137 } else if (is_bad_option(option, args->ignoreUnrecognized, 3138 "check")) { 3139 return JNI_EINVAL; 3140 } 3141 } else if (match_option(option, "vfprintf", &tail)) { 3142 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 3143 } else if (match_option(option, "exit", &tail)) { 3144 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 3145 } else if (match_option(option, "abort", &tail)) { 3146 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 3147 // -XX:+AggressiveHeap 3148 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { 3149 3150 // This option inspects the machine and attempts to set various 3151 // parameters to be optimal for long-running, memory allocation 3152 // intensive jobs. It is intended for machines with large 3153 // amounts of cpu and memory. 3154 3155 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 3156 // VM, but we may not be able to represent the total physical memory 3157 // available (like having 8gb of memory on a box but using a 32bit VM). 3158 // Thus, we need to make sure we're using a julong for intermediate 3159 // calculations. 3160 julong initHeapSize; 3161 julong total_memory = os::physical_memory(); 3162 3163 if (total_memory < (julong)256*M) { 3164 jio_fprintf(defaultStream::error_stream(), 3165 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 3166 vm_exit(1); 3167 } 3168 3169 // The heap size is half of available memory, or (at most) 3170 // all of possible memory less 160mb (leaving room for the OS 3171 // when using ISM). This is the maximum; because adaptive sizing 3172 // is turned on below, the actual space used may be smaller. 3173 3174 initHeapSize = MIN2(total_memory / (julong)2, 3175 total_memory - (julong)160*M); 3176 3177 initHeapSize = limit_by_allocatable_memory(initHeapSize); 3178 3179 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 3180 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); 3181 FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize); 3182 // Currently the minimum size and the initial heap sizes are the same. 3183 set_min_heap_size(initHeapSize); 3184 } 3185 if (FLAG_IS_DEFAULT(NewSize)) { 3186 // Make the young generation 3/8ths of the total heap. 3187 FLAG_SET_CMDLINE(uintx, NewSize, 3188 ((julong)MaxHeapSize / (julong)8) * (julong)3); 3189 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); 3190 } 3191 3192#ifndef _ALLBSD_SOURCE // UseLargePages is not yet supported on BSD. 3193 FLAG_SET_DEFAULT(UseLargePages, true); 3194#endif 3195 3196 // Increase some data structure sizes for efficiency 3197 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); 3198 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 3199 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); 3200 3201 // See the OldPLABSize comment below, but replace 'after promotion' 3202 // with 'after copying'. YoungPLABSize is the size of the survivor 3203 // space per-gc-thread buffers. The default is 4kw. 3204 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words 3205 3206 // OldPLABSize is the size of the buffers in the old gen that 3207 // UseParallelGC uses to promote live data that doesn't fit in the 3208 // survivor spaces. At any given time, there's one for each gc thread. 3209 // The default size is 1kw. These buffers are rarely used, since the 3210 // survivor spaces are usually big enough. For specjbb, however, there 3211 // are occasions when there's lots of live data in the young gen 3212 // and we end up promoting some of it. We don't have a definite 3213 // explanation for why bumping OldPLABSize helps, but the theory 3214 // is that a bigger PLAB results in retaining something like the 3215 // original allocation order after promotion, which improves mutator 3216 // locality. A minor effect may be that larger PLABs reduce the 3217 // number of PLAB allocation events during gc. The value of 8kw 3218 // was arrived at by experimenting with specjbb. 3219 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words 3220 3221 // Enable parallel GC and adaptive generation sizing 3222 FLAG_SET_CMDLINE(bool, UseParallelGC, true); 3223 FLAG_SET_DEFAULT(ParallelGCThreads, 3224 Abstract_VM_Version::parallel_worker_threads()); 3225 3226 // Encourage steady state memory management 3227 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); 3228 3229 // This appears to improve mutator locality 3230 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 3231 3232 // Get around early Solaris scheduling bug 3233 // (affinity vs other jobs on system) 3234 // but disallow DR and offlining (5008695). 3235 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); 3236 3237 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure; 3238 // and the last option wins. 3239 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { 3240 FLAG_SET_CMDLINE(bool, NeverTenure, true); 3241 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); 3242 FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1); 3243 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { 3244 FLAG_SET_CMDLINE(bool, NeverTenure, false); 3245 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); 3246 FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0); 3247 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) { 3248 uintx max_tenuring_thresh = 0; 3249 if(!parse_uintx(tail, &max_tenuring_thresh, 0)) { 3250 jio_fprintf(defaultStream::error_stream(), 3251 "Invalid MaxTenuringThreshold: %s\n", option->optionString); 3252 } 3253 FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh); 3254 3255 if (MaxTenuringThreshold == 0) { 3256 FLAG_SET_CMDLINE(bool, NeverTenure, false); 3257 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); 3258 } else { 3259 FLAG_SET_CMDLINE(bool, NeverTenure, false); 3260 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); 3261 } 3262 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || 3263 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { 3264 jio_fprintf(defaultStream::error_stream(), 3265 "Please use CMSClassUnloadingEnabled in place of " 3266 "CMSPermGenSweepingEnabled in the future\n"); 3267 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { 3268 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); 3269 jio_fprintf(defaultStream::error_stream(), 3270 "Please use -XX:+UseGCOverheadLimit in place of " 3271 "-XX:+UseGCTimeLimit in the future\n"); 3272 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { 3273 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); 3274 jio_fprintf(defaultStream::error_stream(), 3275 "Please use -XX:-UseGCOverheadLimit in place of " 3276 "-XX:-UseGCTimeLimit in the future\n"); 3277 // The TLE options are for compatibility with 1.3 and will be 3278 // removed without notice in a future release. These options 3279 // are not to be documented. 3280 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { 3281 // No longer used. 3282 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { 3283 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); 3284 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { 3285 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 3286 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { 3287 FLAG_SET_CMDLINE(bool, PrintTLAB, true); 3288 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { 3289 FLAG_SET_CMDLINE(bool, PrintTLAB, false); 3290 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { 3291 // No longer used. 3292 } else if (match_option(option, "-XX:TLESize=", &tail)) { 3293 julong long_tlab_size = 0; 3294 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); 3295 if (errcode != arg_in_range) { 3296 jio_fprintf(defaultStream::error_stream(), 3297 "Invalid TLAB size: %s\n", option->optionString); 3298 describe_range_error(errcode); 3299 return JNI_EINVAL; 3300 } 3301 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); 3302 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { 3303 // No longer used. 3304 } else if (match_option(option, "-XX:+UseTLE", &tail)) { 3305 FLAG_SET_CMDLINE(bool, UseTLAB, true); 3306 } else if (match_option(option, "-XX:-UseTLE", &tail)) { 3307 FLAG_SET_CMDLINE(bool, UseTLAB, false); 3308 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { 3309 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); 3310 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); 3311 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { 3312 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); 3313 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); 3314 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { 3315#if defined(DTRACE_ENABLED) 3316 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); 3317 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); 3318 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); 3319 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); 3320#else // defined(DTRACE_ENABLED) 3321 jio_fprintf(defaultStream::error_stream(), 3322 "ExtendedDTraceProbes flag is not applicable for this configuration\n"); 3323 return JNI_EINVAL; 3324#endif // defined(DTRACE_ENABLED) 3325#ifdef ASSERT 3326 } else if (match_option(option, "-XX:+FullGCALot", &tail)) { 3327 FLAG_SET_CMDLINE(bool, FullGCALot, true); 3328 // disable scavenge before parallel mark-compact 3329 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 3330#endif 3331 } else if (match_option(option, "-XX:CMSParPromoteBlocksToClaim=", &tail)) { 3332 julong cms_blocks_to_claim = (julong)atol(tail); 3333 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); 3334 jio_fprintf(defaultStream::error_stream(), 3335 "Please use -XX:OldPLABSize in place of " 3336 "-XX:CMSParPromoteBlocksToClaim in the future\n"); 3337 } else if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { 3338 julong cms_blocks_to_claim = (julong)atol(tail); 3339 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); 3340 jio_fprintf(defaultStream::error_stream(), 3341 "Please use -XX:OldPLABSize in place of " 3342 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); 3343 } else if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { 3344 julong old_plab_size = 0; 3345 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); 3346 if (errcode != arg_in_range) { 3347 jio_fprintf(defaultStream::error_stream(), 3348 "Invalid old PLAB size: %s\n", option->optionString); 3349 describe_range_error(errcode); 3350 return JNI_EINVAL; 3351 } 3352 FLAG_SET_CMDLINE(uintx, OldPLABSize, old_plab_size); 3353 jio_fprintf(defaultStream::error_stream(), 3354 "Please use -XX:OldPLABSize in place of " 3355 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); 3356 } else if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { 3357 julong young_plab_size = 0; 3358 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); 3359 if (errcode != arg_in_range) { 3360 jio_fprintf(defaultStream::error_stream(), 3361 "Invalid young PLAB size: %s\n", option->optionString); 3362 describe_range_error(errcode); 3363 return JNI_EINVAL; 3364 } 3365 FLAG_SET_CMDLINE(uintx, YoungPLABSize, young_plab_size); 3366 jio_fprintf(defaultStream::error_stream(), 3367 "Please use -XX:YoungPLABSize in place of " 3368 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); 3369 } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) || 3370 match_option(option, "-XX:G1MarkStackSize=", &tail)) { 3371 julong stack_size = 0; 3372 ArgsRange errcode = parse_memory_size(tail, &stack_size, 1); 3373 if (errcode != arg_in_range) { 3374 jio_fprintf(defaultStream::error_stream(), 3375 "Invalid mark stack size: %s\n", option->optionString); 3376 describe_range_error(errcode); 3377 return JNI_EINVAL; 3378 } 3379 FLAG_SET_CMDLINE(uintx, MarkStackSize, stack_size); 3380 } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) { 3381 julong max_stack_size = 0; 3382 ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1); 3383 if (errcode != arg_in_range) { 3384 jio_fprintf(defaultStream::error_stream(), 3385 "Invalid maximum mark stack size: %s\n", 3386 option->optionString); 3387 describe_range_error(errcode); 3388 return JNI_EINVAL; 3389 } 3390 FLAG_SET_CMDLINE(uintx, MarkStackSizeMax, max_stack_size); 3391 } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) || 3392 match_option(option, "-XX:ParallelCMSThreads=", &tail)) { 3393 uintx conc_threads = 0; 3394 if (!parse_uintx(tail, &conc_threads, 1)) { 3395 jio_fprintf(defaultStream::error_stream(), 3396 "Invalid concurrent threads: %s\n", option->optionString); 3397 return JNI_EINVAL; 3398 } 3399 FLAG_SET_CMDLINE(uintx, ConcGCThreads, conc_threads); 3400 } else if (match_option(option, "-XX:MaxDirectMemorySize=", &tail)) { 3401 julong max_direct_memory_size = 0; 3402 ArgsRange errcode = parse_memory_size(tail, &max_direct_memory_size, 0); 3403 if (errcode != arg_in_range) { 3404 jio_fprintf(defaultStream::error_stream(), 3405 "Invalid maximum direct memory size: %s\n", 3406 option->optionString); 3407 describe_range_error(errcode); 3408 return JNI_EINVAL; 3409 } 3410 FLAG_SET_CMDLINE(uintx, MaxDirectMemorySize, max_direct_memory_size); 3411#if !INCLUDE_MANAGEMENT 3412 } else if (match_option(option, "-XX:+ManagementServer", &tail)) { 3413 jio_fprintf(defaultStream::error_stream(), 3414 "ManagementServer is not supported in this VM.\n"); 3415 return JNI_ERR; 3416#endif // INCLUDE_MANAGEMENT 3417 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 3418 // Skip -XX:Flags= since that case has already been handled 3419 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { 3420 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 3421 return JNI_EINVAL; 3422 } 3423 } 3424 // Unknown option 3425 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 3426 return JNI_ERR; 3427 } 3428 } 3429 3430 // PrintSharedArchiveAndExit will turn on 3431 // -Xshare:on 3432 // -XX:+TraceClassPaths 3433 if (PrintSharedArchiveAndExit) { 3434 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 3435 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); 3436 FLAG_SET_CMDLINE(bool, TraceClassPaths, true); 3437 } 3438 3439 // Change the default value for flags which have different default values 3440 // when working with older JDKs. 3441#ifdef LINUX 3442 if (JDK_Version::current().compare_major(6) <= 0 && 3443 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { 3444 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); 3445 } 3446#endif // LINUX 3447 fix_appclasspath(); 3448 return JNI_OK; 3449} 3450 3451// Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled) 3452// 3453// This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar 3454// in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar". 3455// Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty 3456// path is treated as the current directory. 3457// 3458// This causes problems with CDS, which requires that all directories specified in the classpath 3459// must be empty. In most cases, applications do NOT want to load classes from the current 3460// directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up 3461// scripts compatible with CDS. 3462void Arguments::fix_appclasspath() { 3463 if (IgnoreEmptyClassPaths) { 3464 const char separator = *os::path_separator(); 3465 const char* src = _java_class_path->value(); 3466 3467 // skip over all the leading empty paths 3468 while (*src == separator) { 3469 src ++; 3470 } 3471 3472 char* copy = AllocateHeap(strlen(src) + 1, mtInternal); 3473 strncpy(copy, src, strlen(src) + 1); 3474 3475 // trim all trailing empty paths 3476 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) { 3477 *tail = '\0'; 3478 } 3479 3480 char from[3] = {separator, separator, '\0'}; 3481 char to [2] = {separator, '\0'}; 3482 while (StringUtils::replace_no_expand(copy, from, to) > 0) { 3483 // Keep replacing "::" -> ":" until we have no more "::" (non-windows) 3484 // Keep replacing ";;" -> ";" until we have no more ";;" (windows) 3485 } 3486 3487 _java_class_path->set_value(copy); 3488 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore 3489 } 3490 3491 if (!PrintSharedArchiveAndExit) { 3492 ClassLoader::trace_class_path("[classpath: ", _java_class_path->value()); 3493 } 3494} 3495 3496static bool has_jar_files(const char* directory) { 3497 DIR* dir = os::opendir(directory); 3498 if (dir == NULL) return false; 3499 3500 struct dirent *entry; 3501 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal); 3502 bool hasJarFile = false; 3503 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { 3504 const char* name = entry->d_name; 3505 const char* ext = name + strlen(name) - 4; 3506 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0); 3507 } 3508 FREE_C_HEAP_ARRAY(char, dbuf, mtInternal); 3509 os::closedir(dir); 3510 return hasJarFile ; 3511} 3512 3513static int check_non_empty_dirs(const char* path) { 3514 const char separator = *os::path_separator(); 3515 const char* const end = path + strlen(path); 3516 int nonEmptyDirs = 0; 3517 while (path < end) { 3518 const char* tmp_end = strchr(path, separator); 3519 if (tmp_end == NULL) { 3520 if (has_jar_files(path)) { 3521 nonEmptyDirs++; 3522 jio_fprintf(defaultStream::output_stream(), 3523 "Non-empty directory: %s\n", path); 3524 } 3525 path = end; 3526 } else { 3527 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtInternal); 3528 memcpy(dirpath, path, tmp_end - path); 3529 dirpath[tmp_end - path] = '\0'; 3530 if (has_jar_files(dirpath)) { 3531 nonEmptyDirs++; 3532 jio_fprintf(defaultStream::output_stream(), 3533 "Non-empty directory: %s\n", dirpath); 3534 } 3535 FREE_C_HEAP_ARRAY(char, dirpath, mtInternal); 3536 path = tmp_end + 1; 3537 } 3538 } 3539 return nonEmptyDirs; 3540} 3541 3542jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { 3543 // check if the default lib/endorsed directory exists; if so, error 3544 char path[JVM_MAXPATHLEN]; 3545 const char* fileSep = os::file_separator(); 3546 sprintf(path, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep); 3547 3548 if (CheckEndorsedAndExtDirs) { 3549 int nonEmptyDirs = 0; 3550 // check endorsed directory 3551 nonEmptyDirs += check_non_empty_dirs(path); 3552 // check the extension directories 3553 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs()); 3554 if (nonEmptyDirs > 0) { 3555 return JNI_ERR; 3556 } 3557 } 3558 3559 DIR* dir = os::opendir(path); 3560 if (dir != NULL) { 3561 jio_fprintf(defaultStream::output_stream(), 3562 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n" 3563 "in modular form will be supported via the concept of upgradeable modules.\n"); 3564 os::closedir(dir); 3565 return JNI_ERR; 3566 } 3567 3568 sprintf(path, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep); 3569 dir = os::opendir(path); 3570 if (dir != NULL) { 3571 jio_fprintf(defaultStream::output_stream(), 3572 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; " 3573 "Use -classpath instead.\n."); 3574 os::closedir(dir); 3575 return JNI_ERR; 3576 } 3577 3578 if (scp_assembly_required) { 3579 // Assemble the bootclasspath elements into the final path. 3580 Arguments::set_sysclasspath(scp_p->combined_path()); 3581 } 3582 3583 // This must be done after all arguments have been processed. 3584 // java_compiler() true means set to "NONE" or empty. 3585 if (java_compiler() && !xdebug_mode()) { 3586 // For backwards compatibility, we switch to interpreted mode if 3587 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 3588 // not specified. 3589 set_mode_flags(_int); 3590 } 3591 3592 if ((TieredCompilation && CompileThresholdScaling == 0) 3593 || (!TieredCompilation && get_scaled_compile_threshold(CompileThreshold) == 0)) { 3594 set_mode_flags(_int); 3595 } 3596 3597 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set 3598 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) { 3599 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold); 3600 } 3601 3602#ifndef COMPILER2 3603 // Don't degrade server performance for footprint 3604 if (FLAG_IS_DEFAULT(UseLargePages) && 3605 MaxHeapSize < LargePageHeapSizeThreshold) { 3606 // No need for large granularity pages w/small heaps. 3607 // Note that large pages are enabled/disabled for both the 3608 // Java heap and the code cache. 3609 FLAG_SET_DEFAULT(UseLargePages, false); 3610 } 3611 3612#else 3613 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { 3614 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); 3615 } 3616#endif 3617 3618#ifndef TIERED 3619 // Tiered compilation is undefined. 3620 UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation"); 3621#endif 3622 3623 // If we are running in a headless jre, force java.awt.headless property 3624 // to be true unless the property has already been set. 3625 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state. 3626 if (os::is_headless_jre()) { 3627 const char* headless = Arguments::get_property("java.awt.headless"); 3628 if (headless == NULL) { 3629 char envbuffer[128]; 3630 if (!os::getenv("JAVA_AWT_HEADLESS", envbuffer, sizeof(envbuffer))) { 3631 if (!add_property("java.awt.headless=true")) { 3632 return JNI_ENOMEM; 3633 } 3634 } else { 3635 char buffer[256]; 3636 strcpy(buffer, "java.awt.headless="); 3637 strcat(buffer, envbuffer); 3638 if (!add_property(buffer)) { 3639 return JNI_ENOMEM; 3640 } 3641 } 3642 } 3643 } 3644 3645 if (!ArgumentsExt::check_vm_args_consistency()) { 3646 return JNI_ERR; 3647 } 3648 3649 return JNI_OK; 3650} 3651 3652jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 3653 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, 3654 scp_assembly_required_p); 3655} 3656 3657jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 3658 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, 3659 scp_assembly_required_p); 3660} 3661 3662jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { 3663 const int N_MAX_OPTIONS = 64; 3664 const int OPTION_BUFFER_SIZE = 1024; 3665 char buffer[OPTION_BUFFER_SIZE]; 3666 3667 // The variable will be ignored if it exceeds the length of the buffer. 3668 // Don't check this variable if user has special privileges 3669 // (e.g. unix su command). 3670 if (os::getenv(name, buffer, sizeof(buffer)) && 3671 !os::have_special_privileges()) { 3672 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array 3673 jio_fprintf(defaultStream::error_stream(), 3674 "Picked up %s: %s\n", name, buffer); 3675 char* rd = buffer; // pointer to the input string (rd) 3676 int i; 3677 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string 3678 while (isspace(*rd)) rd++; // skip whitespace 3679 if (*rd == 0) break; // we re done when the input string is read completely 3680 3681 // The output, option string, overwrites the input string. 3682 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to 3683 // input string (rd). 3684 char* wrt = rd; 3685 3686 options[i++].optionString = wrt; // Fill in option 3687 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL 3688 if (*rd == '\'' || *rd == '"') { // handle a quoted string 3689 int quote = *rd; // matching quote to look for 3690 rd++; // don't copy open quote 3691 while (*rd != quote) { // include everything (even spaces) up until quote 3692 if (*rd == 0) { // string termination means unmatched string 3693 jio_fprintf(defaultStream::error_stream(), 3694 "Unmatched quote in %s\n", name); 3695 return JNI_ERR; 3696 } 3697 *wrt++ = *rd++; // copy to option string 3698 } 3699 rd++; // don't copy close quote 3700 } else { 3701 *wrt++ = *rd++; // copy to option string 3702 } 3703 } 3704 // Need to check if we're done before writing a NULL, 3705 // because the write could be to the byte that rd is pointing to. 3706 if (*rd++ == 0) { 3707 *wrt = 0; 3708 break; 3709 } 3710 *wrt = 0; // Zero terminate option 3711 } 3712 // Construct JavaVMInitArgs structure and parse as if it was part of the command line 3713 JavaVMInitArgs vm_args; 3714 vm_args.version = JNI_VERSION_1_2; 3715 vm_args.options = options; 3716 vm_args.nOptions = i; 3717 vm_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; 3718 3719 if (PrintVMOptions) { 3720 const char* tail; 3721 for (int i = 0; i < vm_args.nOptions; i++) { 3722 const JavaVMOption *option = vm_args.options + i; 3723 if (match_option(option, "-XX:", &tail)) { 3724 logOption(tail); 3725 } 3726 } 3727 } 3728 3729 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, Flag::ENVIRON_VAR)); 3730 } 3731 return JNI_OK; 3732} 3733 3734void Arguments::set_shared_spaces_flags() { 3735 if (DumpSharedSpaces) { 3736 if (RequireSharedSpaces) { 3737 warning("cannot dump shared archive while using shared archive"); 3738 } 3739 UseSharedSpaces = false; 3740#ifdef _LP64 3741 if (!UseCompressedOops || !UseCompressedClassPointers) { 3742 vm_exit_during_initialization( 3743 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL); 3744 } 3745 } else { 3746 if (!UseCompressedOops || !UseCompressedClassPointers) { 3747 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces."); 3748 } 3749#endif 3750 } 3751} 3752 3753#if !INCLUDE_ALL_GCS 3754static void force_serial_gc() { 3755 FLAG_SET_DEFAULT(UseSerialGC, true); 3756 FLAG_SET_DEFAULT(CMSIncrementalMode, false); // special CMS suboption 3757 UNSUPPORTED_GC_OPTION(UseG1GC); 3758 UNSUPPORTED_GC_OPTION(UseParallelGC); 3759 UNSUPPORTED_GC_OPTION(UseParallelOldGC); 3760 UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC); 3761 UNSUPPORTED_GC_OPTION(UseParNewGC); 3762} 3763#endif // INCLUDE_ALL_GCS 3764 3765// Sharing support 3766// Construct the path to the archive 3767static char* get_shared_archive_path() { 3768 char *shared_archive_path; 3769 if (SharedArchiveFile == NULL) { 3770 char jvm_path[JVM_MAXPATHLEN]; 3771 os::jvm_path(jvm_path, sizeof(jvm_path)); 3772 char *end = strrchr(jvm_path, *os::file_separator()); 3773 if (end != NULL) *end = '\0'; 3774 size_t jvm_path_len = strlen(jvm_path); 3775 size_t file_sep_len = strlen(os::file_separator()); 3776 shared_archive_path = NEW_C_HEAP_ARRAY(char, jvm_path_len + 3777 file_sep_len + 20, mtInternal); 3778 if (shared_archive_path != NULL) { 3779 strncpy(shared_archive_path, jvm_path, jvm_path_len + 1); 3780 strncat(shared_archive_path, os::file_separator(), file_sep_len); 3781 strncat(shared_archive_path, "classes.jsa", 11); 3782 } 3783 } else { 3784 shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(SharedArchiveFile) + 1, mtInternal); 3785 if (shared_archive_path != NULL) { 3786 strncpy(shared_archive_path, SharedArchiveFile, strlen(SharedArchiveFile) + 1); 3787 } 3788 } 3789 return shared_archive_path; 3790} 3791 3792#ifndef PRODUCT 3793// Determine whether LogVMOutput should be implicitly turned on. 3794static bool use_vm_log() { 3795 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) || 3796 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods || 3797 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers || 3798 PrintAssembly || TraceDeoptimization || TraceDependencies || 3799 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) { 3800 return true; 3801 } 3802 3803#ifdef COMPILER1 3804 if (PrintC1Statistics) { 3805 return true; 3806 } 3807#endif // COMPILER1 3808 3809#ifdef COMPILER2 3810 if (PrintOptoAssembly || PrintOptoStatistics) { 3811 return true; 3812 } 3813#endif // COMPILER2 3814 3815 return false; 3816} 3817#endif // PRODUCT 3818 3819// Parse entry point called from JNI_CreateJavaVM 3820 3821jint Arguments::parse(const JavaVMInitArgs* args) { 3822 3823 // Remaining part of option string 3824 const char* tail; 3825 3826 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 3827 const char* hotspotrc = ".hotspotrc"; 3828 bool settings_file_specified = false; 3829 bool needs_hotspotrc_warning = false; 3830 3831 const char* flags_file; 3832 int index; 3833 for (index = 0; index < args->nOptions; index++) { 3834 const JavaVMOption *option = args->options + index; 3835 if (ArgumentsExt::process_options(option)) { 3836 continue; 3837 } 3838 if (match_option(option, "-XX:Flags=", &tail)) { 3839 flags_file = tail; 3840 settings_file_specified = true; 3841 continue; 3842 } 3843 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { 3844 PrintVMOptions = true; 3845 continue; 3846 } 3847 if (match_option(option, "-XX:-PrintVMOptions", &tail)) { 3848 PrintVMOptions = false; 3849 continue; 3850 } 3851 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions", &tail)) { 3852 IgnoreUnrecognizedVMOptions = true; 3853 continue; 3854 } 3855 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions", &tail)) { 3856 IgnoreUnrecognizedVMOptions = false; 3857 continue; 3858 } 3859 if (match_option(option, "-XX:+PrintFlagsInitial", &tail)) { 3860 CommandLineFlags::printFlags(tty, false); 3861 vm_exit(0); 3862 } 3863#if INCLUDE_NMT 3864 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) { 3865 // The launcher did not setup nmt environment variable properly. 3866 if (!MemTracker::check_launcher_nmt_support(tail)) { 3867 warning("Native Memory Tracking did not setup properly, using wrong launcher?"); 3868 } 3869 3870 // Verify if nmt option is valid. 3871 if (MemTracker::verify_nmt_option()) { 3872 // Late initialization, still in single-threaded mode. 3873 if (MemTracker::tracking_level() >= NMT_summary) { 3874 MemTracker::init(); 3875 } 3876 } else { 3877 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); 3878 } 3879 continue; 3880 } 3881#endif 3882 3883 3884#ifndef PRODUCT 3885 if (match_option(option, "-XX:+PrintFlagsWithComments", &tail)) { 3886 CommandLineFlags::printFlags(tty, true); 3887 vm_exit(0); 3888 } 3889#endif 3890 } 3891 3892 if (IgnoreUnrecognizedVMOptions) { 3893 // uncast const to modify the flag args->ignoreUnrecognized 3894 *(jboolean*)(&args->ignoreUnrecognized) = true; 3895 } 3896 3897 // Parse specified settings file 3898 if (settings_file_specified) { 3899 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) { 3900 return JNI_EINVAL; 3901 } 3902 } else { 3903#ifdef ASSERT 3904 // Parse default .hotspotrc settings file 3905 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { 3906 return JNI_EINVAL; 3907 } 3908#else 3909 struct stat buf; 3910 if (os::stat(hotspotrc, &buf) == 0) { 3911 needs_hotspotrc_warning = true; 3912 } 3913#endif 3914 } 3915 3916 if (PrintVMOptions) { 3917 for (index = 0; index < args->nOptions; index++) { 3918 const JavaVMOption *option = args->options + index; 3919 if (match_option(option, "-XX:", &tail)) { 3920 logOption(tail); 3921 } 3922 } 3923 } 3924 3925 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 3926 jint result = parse_vm_init_args(args); 3927 if (result != JNI_OK) { 3928 return result; 3929 } 3930 3931 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed. 3932 SharedArchivePath = get_shared_archive_path(); 3933 if (SharedArchivePath == NULL) { 3934 return JNI_ENOMEM; 3935 } 3936 3937 // Set up VerifySharedSpaces 3938 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) { 3939 VerifySharedSpaces = true; 3940 } 3941 3942 // Delay warning until here so that we've had a chance to process 3943 // the -XX:-PrintWarnings flag 3944 if (needs_hotspotrc_warning) { 3945 warning("%s file is present but has been ignored. " 3946 "Run with -XX:Flags=%s to load the file.", 3947 hotspotrc, hotspotrc); 3948 } 3949 3950#ifdef _ALLBSD_SOURCE // UseLargePages is not yet supported on BSD. 3951 UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages"); 3952#endif 3953 3954#if INCLUDE_ALL_GCS 3955 #if (defined JAVASE_EMBEDDED || defined ARM) 3956 UNSUPPORTED_OPTION(UseG1GC, "G1 GC"); 3957 #endif 3958#endif 3959 3960#ifndef PRODUCT 3961 if (TraceBytecodesAt != 0) { 3962 TraceBytecodes = true; 3963 } 3964 if (CountCompiledCalls) { 3965 if (UseCounterDecay) { 3966 warning("UseCounterDecay disabled because CountCalls is set"); 3967 UseCounterDecay = false; 3968 } 3969 } 3970#endif // PRODUCT 3971 3972 if (ScavengeRootsInCode == 0) { 3973 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { 3974 warning("forcing ScavengeRootsInCode non-zero"); 3975 } 3976 ScavengeRootsInCode = 1; 3977 } 3978 3979 if (PrintGCDetails) { 3980 // Turn on -verbose:gc options as well 3981 PrintGC = true; 3982 } 3983 3984 // Set object alignment values. 3985 set_object_alignment(); 3986 3987#if !INCLUDE_ALL_GCS 3988 force_serial_gc(); 3989#endif // INCLUDE_ALL_GCS 3990#if !INCLUDE_CDS 3991 if (DumpSharedSpaces || RequireSharedSpaces) { 3992 jio_fprintf(defaultStream::error_stream(), 3993 "Shared spaces are not supported in this VM\n"); 3994 return JNI_ERR; 3995 } 3996 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) { 3997 warning("Shared spaces are not supported in this VM"); 3998 FLAG_SET_DEFAULT(UseSharedSpaces, false); 3999 FLAG_SET_DEFAULT(PrintSharedSpaces, false); 4000 } 4001 no_shared_spaces("CDS Disabled"); 4002#endif // INCLUDE_CDS 4003 4004 return JNI_OK; 4005} 4006 4007jint Arguments::apply_ergo() { 4008 4009 // Set flags based on ergonomics. 4010 set_ergonomics_flags(); 4011 4012 set_shared_spaces_flags(); 4013 4014 // Check the GC selections again. 4015 if (!ArgumentsExt::check_gc_consistency_ergo()) { 4016 return JNI_EINVAL; 4017 } 4018 4019 if (TieredCompilation) { 4020 set_tiered_flags(); 4021 } else { 4022 // Check if the policy is valid. Policies 0 and 1 are valid for non-tiered setup. 4023 if (CompilationPolicyChoice >= 2) { 4024 vm_exit_during_initialization( 4025 "Incompatible compilation policy selected", NULL); 4026 } 4027 // Scale CompileThreshold 4028 if (!FLAG_IS_DEFAULT(CompileThresholdScaling)) { 4029 FLAG_SET_ERGO(intx, CompileThreshold, get_scaled_compile_threshold(CompileThreshold)); 4030 } 4031 } 4032 4033#ifdef COMPILER2 4034#ifndef PRODUCT 4035 if (PrintIdealGraphLevel > 0) { 4036 FLAG_SET_ERGO(bool, PrintIdealGraph, true); 4037 } 4038#endif 4039#endif 4040 4041 // Set heap size based on available physical memory 4042 set_heap_size(); 4043 4044 set_gc_specific_flags(); 4045 4046 // Initialize Metaspace flags and alignments 4047 Metaspace::ergo_initialize(); 4048 4049 // Set bytecode rewriting flags 4050 set_bytecode_flags(); 4051 4052 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled 4053 set_aggressive_opts_flags(); 4054 4055 // Turn off biased locking for locking debug mode flags, 4056 // which are subtly different from each other but neither works with 4057 // biased locking 4058 if (UseHeavyMonitors 4059#ifdef COMPILER1 4060 || !UseFastLocking 4061#endif // COMPILER1 4062 ) { 4063 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) { 4064 // flag set to true on command line; warn the user that they 4065 // can't enable biased locking here 4066 warning("Biased Locking is not supported with locking debug flags" 4067 "; ignoring UseBiasedLocking flag." ); 4068 } 4069 UseBiasedLocking = false; 4070 } 4071 4072#ifdef ZERO 4073 // Clear flags not supported on zero. 4074 FLAG_SET_DEFAULT(ProfileInterpreter, false); 4075 FLAG_SET_DEFAULT(UseBiasedLocking, false); 4076 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); 4077 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false)); 4078#endif // CC_INTERP 4079 4080#ifdef COMPILER2 4081 if (!EliminateLocks) { 4082 EliminateNestedLocks = false; 4083 } 4084 if (!Inline) { 4085 IncrementalInline = false; 4086 } 4087#ifndef PRODUCT 4088 if (!IncrementalInline) { 4089 AlwaysIncrementalInline = false; 4090 } 4091#endif 4092 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) { 4093 // nothing to use the profiling, turn if off 4094 FLAG_SET_DEFAULT(TypeProfileLevel, 0); 4095 } 4096#endif 4097 4098 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { 4099 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); 4100 DebugNonSafepoints = true; 4101 } 4102 4103 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) { 4104 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used"); 4105 } 4106 4107#ifndef PRODUCT 4108 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) { 4109 if (use_vm_log()) { 4110 LogVMOutput = true; 4111 } 4112 } 4113#endif // PRODUCT 4114 4115 if (PrintCommandLineFlags) { 4116 CommandLineFlags::printSetFlags(tty); 4117 } 4118 4119 // Apply CPU specific policy for the BiasedLocking 4120 if (UseBiasedLocking) { 4121 if (!VM_Version::use_biased_locking() && 4122 !(FLAG_IS_CMDLINE(UseBiasedLocking))) { 4123 UseBiasedLocking = false; 4124 } 4125 } 4126#ifdef COMPILER2 4127 if (!UseBiasedLocking || EmitSync != 0) { 4128 UseOptoBiasInlining = false; 4129 } 4130#endif 4131 4132 return JNI_OK; 4133} 4134 4135jint Arguments::adjust_after_os() { 4136 if (UseNUMA) { 4137 if (UseParallelGC || UseParallelOldGC) { 4138 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) { 4139 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M); 4140 } 4141 } 4142 // UseNUMAInterleaving is set to ON for all collectors and 4143 // platforms when UseNUMA is set to ON. NUMA-aware collectors 4144 // such as the parallel collector for Linux and Solaris will 4145 // interleave old gen and survivor spaces on top of NUMA 4146 // allocation policy for the eden space. 4147 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on 4148 // all platforms and ParallelGC on Windows will interleave all 4149 // of the heap spaces across NUMA nodes. 4150 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) { 4151 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true); 4152 } 4153 } 4154 return JNI_OK; 4155} 4156 4157int Arguments::PropertyList_count(SystemProperty* pl) { 4158 int count = 0; 4159 while(pl != NULL) { 4160 count++; 4161 pl = pl->next(); 4162 } 4163 return count; 4164} 4165 4166const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 4167 assert(key != NULL, "just checking"); 4168 SystemProperty* prop; 4169 for (prop = pl; prop != NULL; prop = prop->next()) { 4170 if (strcmp(key, prop->key()) == 0) return prop->value(); 4171 } 4172 return NULL; 4173} 4174 4175const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 4176 int count = 0; 4177 const char* ret_val = NULL; 4178 4179 while(pl != NULL) { 4180 if(count >= index) { 4181 ret_val = pl->key(); 4182 break; 4183 } 4184 count++; 4185 pl = pl->next(); 4186 } 4187 4188 return ret_val; 4189} 4190 4191char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 4192 int count = 0; 4193 char* ret_val = NULL; 4194 4195 while(pl != NULL) { 4196 if(count >= index) { 4197 ret_val = pl->value(); 4198 break; 4199 } 4200 count++; 4201 pl = pl->next(); 4202 } 4203 4204 return ret_val; 4205} 4206 4207void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 4208 SystemProperty* p = *plist; 4209 if (p == NULL) { 4210 *plist = new_p; 4211 } else { 4212 while (p->next() != NULL) { 4213 p = p->next(); 4214 } 4215 p->set_next(new_p); 4216 } 4217} 4218 4219void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { 4220 if (plist == NULL) 4221 return; 4222 4223 SystemProperty* new_p = new SystemProperty(k, v, true); 4224 PropertyList_add(plist, new_p); 4225} 4226 4227// This add maintains unique property key in the list. 4228void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append) { 4229 if (plist == NULL) 4230 return; 4231 4232 // If property key exist then update with new value. 4233 SystemProperty* prop; 4234 for (prop = *plist; prop != NULL; prop = prop->next()) { 4235 if (strcmp(k, prop->key()) == 0) { 4236 if (append) { 4237 prop->append_value(v); 4238 } else { 4239 prop->set_value(v); 4240 } 4241 return; 4242 } 4243 } 4244 4245 PropertyList_add(plist, k, v); 4246} 4247 4248// Copies src into buf, replacing "%%" with "%" and "%p" with pid 4249// Returns true if all of the source pointed by src has been copied over to 4250// the destination buffer pointed by buf. Otherwise, returns false. 4251// Notes: 4252// 1. If the length (buflen) of the destination buffer excluding the 4253// NULL terminator character is not long enough for holding the expanded 4254// pid characters, it also returns false instead of returning the partially 4255// expanded one. 4256// 2. The passed in "buflen" should be large enough to hold the null terminator. 4257bool Arguments::copy_expand_pid(const char* src, size_t srclen, 4258 char* buf, size_t buflen) { 4259 const char* p = src; 4260 char* b = buf; 4261 const char* src_end = &src[srclen]; 4262 char* buf_end = &buf[buflen - 1]; 4263 4264 while (p < src_end && b < buf_end) { 4265 if (*p == '%') { 4266 switch (*(++p)) { 4267 case '%': // "%%" ==> "%" 4268 *b++ = *p++; 4269 break; 4270 case 'p': { // "%p" ==> current process id 4271 // buf_end points to the character before the last character so 4272 // that we could write '\0' to the end of the buffer. 4273 size_t buf_sz = buf_end - b + 1; 4274 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 4275 4276 // if jio_snprintf fails or the buffer is not long enough to hold 4277 // the expanded pid, returns false. 4278 if (ret < 0 || ret >= (int)buf_sz) { 4279 return false; 4280 } else { 4281 b += ret; 4282 assert(*b == '\0', "fail in copy_expand_pid"); 4283 if (p == src_end && b == buf_end + 1) { 4284 // reach the end of the buffer. 4285 return true; 4286 } 4287 } 4288 p++; 4289 break; 4290 } 4291 default : 4292 *b++ = '%'; 4293 } 4294 } else { 4295 *b++ = *p++; 4296 } 4297 } 4298 *b = '\0'; 4299 return (p == src_end); // return false if not all of the source was copied 4300} 4301