Mercurial > hg > truffle
annotate src/share/vm/runtime/arguments.cpp @ 416:b6cfd754403d
6649622: HotSpot Biased locking needs tuning on latest CPUs
Reviewed-by: rasbold, kvn, kamg
| author | never |
|---|---|
| date | Tue, 28 Oct 2008 18:02:09 -0700 |
| parents | 032ddb9432ad |
| children | a1980da045cc |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_arguments.cpp.incl" | |
| 27 | |
| 28 #define DEFAULT_VENDOR_URL_BUG "http://java.sun.com/webapps/bugreport/crash.jsp" | |
| 29 #define DEFAULT_JAVA_LAUNCHER "generic" | |
| 30 | |
| 31 char** Arguments::_jvm_flags_array = NULL; | |
| 32 int Arguments::_num_jvm_flags = 0; | |
| 33 char** Arguments::_jvm_args_array = NULL; | |
| 34 int Arguments::_num_jvm_args = 0; | |
| 35 char* Arguments::_java_command = NULL; | |
| 36 SystemProperty* Arguments::_system_properties = NULL; | |
| 37 const char* Arguments::_gc_log_filename = NULL; | |
| 38 bool Arguments::_has_profile = false; | |
| 39 bool Arguments::_has_alloc_profile = false; | |
| 40 uintx Arguments::_initial_heap_size = 0; | |
| 41 uintx Arguments::_min_heap_size = 0; | |
| 42 Arguments::Mode Arguments::_mode = _mixed; | |
| 43 bool Arguments::_java_compiler = false; | |
| 44 bool Arguments::_xdebug_mode = false; | |
| 45 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; | |
| 46 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; | |
| 47 int Arguments::_sun_java_launcher_pid = -1; | |
| 48 | |
| 49 // These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*) | |
| 50 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; | |
| 51 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; | |
| 52 bool Arguments::_BackgroundCompilation = BackgroundCompilation; | |
| 53 bool Arguments::_ClipInlining = ClipInlining; | |
| 54 intx Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; | |
| 55 | |
| 56 char* Arguments::SharedArchivePath = NULL; | |
| 57 | |
| 58 AgentLibraryList Arguments::_libraryList; | |
| 59 AgentLibraryList Arguments::_agentList; | |
| 60 | |
| 61 abort_hook_t Arguments::_abort_hook = NULL; | |
| 62 exit_hook_t Arguments::_exit_hook = NULL; | |
| 63 vfprintf_hook_t Arguments::_vfprintf_hook = NULL; | |
| 64 | |
| 65 | |
| 66 SystemProperty *Arguments::_java_ext_dirs = NULL; | |
| 67 SystemProperty *Arguments::_java_endorsed_dirs = NULL; | |
| 68 SystemProperty *Arguments::_sun_boot_library_path = NULL; | |
| 69 SystemProperty *Arguments::_java_library_path = NULL; | |
| 70 SystemProperty *Arguments::_java_home = NULL; | |
| 71 SystemProperty *Arguments::_java_class_path = NULL; | |
| 72 SystemProperty *Arguments::_sun_boot_class_path = NULL; | |
| 73 | |
| 74 char* Arguments::_meta_index_path = NULL; | |
| 75 char* Arguments::_meta_index_dir = NULL; | |
| 76 | |
| 77 static bool force_client_mode = false; | |
| 78 | |
| 79 // Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string | |
| 80 | |
| 81 static bool match_option(const JavaVMOption *option, const char* name, | |
| 82 const char** tail) { | |
| 83 int len = (int)strlen(name); | |
| 84 if (strncmp(option->optionString, name, len) == 0) { | |
| 85 *tail = option->optionString + len; | |
| 86 return true; | |
| 87 } else { | |
| 88 return false; | |
| 89 } | |
| 90 } | |
| 91 | |
| 92 static void logOption(const char* opt) { | |
| 93 if (PrintVMOptions) { | |
| 94 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); | |
| 95 } | |
| 96 } | |
| 97 | |
| 98 // Process java launcher properties. | |
| 99 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { | |
| 100 // See if sun.java.launcher or sun.java.launcher.pid is defined. | |
| 101 // Must do this before setting up other system properties, | |
| 102 // as some of them may depend on launcher type. | |
| 103 for (int index = 0; index < args->nOptions; index++) { | |
| 104 const JavaVMOption* option = args->options + index; | |
| 105 const char* tail; | |
| 106 | |
| 107 if (match_option(option, "-Dsun.java.launcher=", &tail)) { | |
| 108 process_java_launcher_argument(tail, option->extraInfo); | |
| 109 continue; | |
| 110 } | |
| 111 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { | |
| 112 _sun_java_launcher_pid = atoi(tail); | |
| 113 continue; | |
| 114 } | |
| 115 } | |
| 116 } | |
| 117 | |
| 118 // Initialize system properties key and value. | |
| 119 void Arguments::init_system_properties() { | |
| 120 | |
| 121 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.version", "1.0", false)); | |
| 122 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", | |
| 123 "Java Virtual Machine Specification", false)); | |
| 124 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.vendor", | |
| 125 "Sun Microsystems Inc.", false)); | |
| 126 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); | |
| 127 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); | |
| 128 PropertyList_add(&_system_properties, new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); | |
| 129 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); | |
| 130 | |
| 131 // following are JVMTI agent writeable properties. | |
| 132 // Properties values are set to NULL and they are | |
| 133 // os specific they are initialized in os::init_system_properties_values(). | |
| 134 _java_ext_dirs = new SystemProperty("java.ext.dirs", NULL, true); | |
| 135 _java_endorsed_dirs = new SystemProperty("java.endorsed.dirs", NULL, true); | |
| 136 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); | |
| 137 _java_library_path = new SystemProperty("java.library.path", NULL, true); | |
| 138 _java_home = new SystemProperty("java.home", NULL, true); | |
| 139 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true); | |
| 140 | |
| 141 _java_class_path = new SystemProperty("java.class.path", "", true); | |
| 142 | |
| 143 // Add to System Property list. | |
| 144 PropertyList_add(&_system_properties, _java_ext_dirs); | |
| 145 PropertyList_add(&_system_properties, _java_endorsed_dirs); | |
| 146 PropertyList_add(&_system_properties, _sun_boot_library_path); | |
| 147 PropertyList_add(&_system_properties, _java_library_path); | |
| 148 PropertyList_add(&_system_properties, _java_home); | |
| 149 PropertyList_add(&_system_properties, _java_class_path); | |
| 150 PropertyList_add(&_system_properties, _sun_boot_class_path); | |
| 151 | |
| 152 // Set OS specific system properties values | |
| 153 os::init_system_properties_values(); | |
| 154 } | |
| 155 | |
| 242 | 156 /** |
| 157 * Provide a slightly more user-friendly way of eliminating -XX flags. | |
| 158 * When a flag is eliminated, it can be added to this list in order to | |
| 159 * continue accepting this flag on the command-line, while issuing a warning | |
| 160 * and ignoring the value. Once the JDK version reaches the 'accept_until' | |
| 161 * limit, we flatly refuse to admit the existence of the flag. This allows | |
| 162 * a flag to die correctly over JDK releases using HSX. | |
| 163 */ | |
| 164 typedef struct { | |
| 165 const char* name; | |
| 166 JDK_Version obsoleted_in; // when the flag went away | |
| 167 JDK_Version accept_until; // which version to start denying the existence | |
| 168 } ObsoleteFlag; | |
| 0 | 169 |
| 242 | 170 static ObsoleteFlag obsolete_jvm_flags[] = { |
| 171 { "UseTrainGC", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 172 { "UseSpecialLargeObjectHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 173 { "UseOversizedCarHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 174 { "TraceCarAllocation", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 175 { "PrintTrainGCProcessingStats", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 176 { "LogOfCarSpaceSize", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 177 { "OversizedCarThreshold", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 178 { "MinTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 179 { "DefaultTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 180 { "MaxTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 181 { "DelayTickAdjustment", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 182 { "ProcessingToTenuringRatio", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 183 { "MinTrainLength", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
| 184 { "AppendRatio", JDK_Version::jdk_update(6,10), JDK_Version::jdk(7) }, | |
| 185 { NULL, JDK_Version(0), JDK_Version(0) } | |
| 186 }; | |
| 187 | |
| 188 // Returns true if the flag is obsolete and fits into the range specified | |
| 189 // for being ignored. In the case that the flag is ignored, the 'version' | |
| 190 // value is filled in with the version number when the flag became | |
| 191 // obsolete so that that value can be displayed to the user. | |
| 192 bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) { | |
| 0 | 193 int i = 0; |
| 242 | 194 assert(version != NULL, "Must provide a version buffer"); |
| 195 while (obsolete_jvm_flags[i].name != NULL) { | |
| 196 const ObsoleteFlag& flag_status = obsolete_jvm_flags[i]; | |
| 0 | 197 // <flag>=xxx form |
| 198 // [-|+]<flag> form | |
| 242 | 199 if ((strncmp(flag_status.name, s, strlen(flag_status.name)) == 0) || |
| 0 | 200 ((s[0] == '+' || s[0] == '-') && |
| 242 | 201 (strncmp(flag_status.name, &s[1], strlen(flag_status.name)) == 0))) { |
| 202 if (JDK_Version::current().compare(flag_status.accept_until) == -1) { | |
| 203 *version = flag_status.obsoleted_in; | |
| 204 return true; | |
| 205 } | |
| 0 | 206 } |
| 207 i++; | |
| 208 } | |
| 209 return false; | |
| 210 } | |
| 211 | |
| 212 // Constructs the system class path (aka boot class path) from the following | |
| 213 // components, in order: | |
| 214 // | |
| 215 // prefix // from -Xbootclasspath/p:... | |
| 216 // endorsed // the expansion of -Djava.endorsed.dirs=... | |
| 217 // base // from os::get_system_properties() or -Xbootclasspath= | |
| 218 // suffix // from -Xbootclasspath/a:... | |
| 219 // | |
| 220 // java.endorsed.dirs is a list of directories; any jar or zip files in the | |
| 221 // directories are added to the sysclasspath just before the base. | |
| 222 // | |
| 223 // This could be AllStatic, but it isn't needed after argument processing is | |
| 224 // complete. | |
| 225 class SysClassPath: public StackObj { | |
| 226 public: | |
| 227 SysClassPath(const char* base); | |
| 228 ~SysClassPath(); | |
| 229 | |
| 230 inline void set_base(const char* base); | |
| 231 inline void add_prefix(const char* prefix); | |
| 232 inline void add_suffix(const char* suffix); | |
| 233 inline void reset_path(const char* base); | |
| 234 | |
| 235 // Expand the jar/zip files in each directory listed by the java.endorsed.dirs | |
| 236 // property. Must be called after all command-line arguments have been | |
| 237 // processed (in particular, -Djava.endorsed.dirs=...) and before calling | |
| 238 // combined_path(). | |
| 239 void expand_endorsed(); | |
| 240 | |
| 241 inline const char* get_base() const { return _items[_scp_base]; } | |
| 242 inline const char* get_prefix() const { return _items[_scp_prefix]; } | |
| 243 inline const char* get_suffix() const { return _items[_scp_suffix]; } | |
| 244 inline const char* get_endorsed() const { return _items[_scp_endorsed]; } | |
| 245 | |
| 246 // Combine all the components into a single c-heap-allocated string; caller | |
| 247 // must free the string if/when no longer needed. | |
| 248 char* combined_path(); | |
| 249 | |
| 250 private: | |
| 251 // Utility routines. | |
| 252 static char* add_to_path(const char* path, const char* str, bool prepend); | |
| 253 static char* add_jars_to_path(char* path, const char* directory); | |
| 254 | |
| 255 inline void reset_item_at(int index); | |
| 256 | |
| 257 // Array indices for the items that make up the sysclasspath. All except the | |
| 258 // base are allocated in the C heap and freed by this class. | |
| 259 enum { | |
| 260 _scp_prefix, // from -Xbootclasspath/p:... | |
| 261 _scp_endorsed, // the expansion of -Djava.endorsed.dirs=... | |
| 262 _scp_base, // the default sysclasspath | |
| 263 _scp_suffix, // from -Xbootclasspath/a:... | |
| 264 _scp_nitems // the number of items, must be last. | |
| 265 }; | |
| 266 | |
| 267 const char* _items[_scp_nitems]; | |
| 268 DEBUG_ONLY(bool _expansion_done;) | |
| 269 }; | |
| 270 | |
| 271 SysClassPath::SysClassPath(const char* base) { | |
| 272 memset(_items, 0, sizeof(_items)); | |
| 273 _items[_scp_base] = base; | |
| 274 DEBUG_ONLY(_expansion_done = false;) | |
| 275 } | |
| 276 | |
| 277 SysClassPath::~SysClassPath() { | |
| 278 // Free everything except the base. | |
| 279 for (int i = 0; i < _scp_nitems; ++i) { | |
| 280 if (i != _scp_base) reset_item_at(i); | |
| 281 } | |
| 282 DEBUG_ONLY(_expansion_done = false;) | |
| 283 } | |
| 284 | |
| 285 inline void SysClassPath::set_base(const char* base) { | |
| 286 _items[_scp_base] = base; | |
| 287 } | |
| 288 | |
| 289 inline void SysClassPath::add_prefix(const char* prefix) { | |
| 290 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); | |
| 291 } | |
| 292 | |
| 293 inline void SysClassPath::add_suffix(const char* suffix) { | |
| 294 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); | |
| 295 } | |
| 296 | |
| 297 inline void SysClassPath::reset_item_at(int index) { | |
| 298 assert(index < _scp_nitems && index != _scp_base, "just checking"); | |
| 299 if (_items[index] != NULL) { | |
| 300 FREE_C_HEAP_ARRAY(char, _items[index]); | |
| 301 _items[index] = NULL; | |
| 302 } | |
| 303 } | |
| 304 | |
| 305 inline void SysClassPath::reset_path(const char* base) { | |
| 306 // Clear the prefix and suffix. | |
| 307 reset_item_at(_scp_prefix); | |
| 308 reset_item_at(_scp_suffix); | |
| 309 set_base(base); | |
| 310 } | |
| 311 | |
| 312 //------------------------------------------------------------------------------ | |
| 313 | |
| 314 void SysClassPath::expand_endorsed() { | |
| 315 assert(_items[_scp_endorsed] == NULL, "can only be called once."); | |
| 316 | |
| 317 const char* path = Arguments::get_property("java.endorsed.dirs"); | |
| 318 if (path == NULL) { | |
| 319 path = Arguments::get_endorsed_dir(); | |
| 320 assert(path != NULL, "no default for java.endorsed.dirs"); | |
| 321 } | |
| 322 | |
| 323 char* expanded_path = NULL; | |
| 324 const char separator = *os::path_separator(); | |
| 325 const char* const end = path + strlen(path); | |
| 326 while (path < end) { | |
| 327 const char* tmp_end = strchr(path, separator); | |
| 328 if (tmp_end == NULL) { | |
| 329 expanded_path = add_jars_to_path(expanded_path, path); | |
| 330 path = end; | |
| 331 } else { | |
| 332 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1); | |
| 333 memcpy(dirpath, path, tmp_end - path); | |
| 334 dirpath[tmp_end - path] = '\0'; | |
| 335 expanded_path = add_jars_to_path(expanded_path, dirpath); | |
| 336 FREE_C_HEAP_ARRAY(char, dirpath); | |
| 337 path = tmp_end + 1; | |
| 338 } | |
| 339 } | |
| 340 _items[_scp_endorsed] = expanded_path; | |
| 341 DEBUG_ONLY(_expansion_done = true;) | |
| 342 } | |
| 343 | |
| 344 // Combine the bootclasspath elements, some of which may be null, into a single | |
| 345 // c-heap-allocated string. | |
| 346 char* SysClassPath::combined_path() { | |
| 347 assert(_items[_scp_base] != NULL, "empty default sysclasspath"); | |
| 348 assert(_expansion_done, "must call expand_endorsed() first."); | |
| 349 | |
| 350 size_t lengths[_scp_nitems]; | |
| 351 size_t total_len = 0; | |
| 352 | |
| 353 const char separator = *os::path_separator(); | |
| 354 | |
| 355 // Get the lengths. | |
| 356 int i; | |
| 357 for (i = 0; i < _scp_nitems; ++i) { | |
| 358 if (_items[i] != NULL) { | |
| 359 lengths[i] = strlen(_items[i]); | |
| 360 // Include space for the separator char (or a NULL for the last item). | |
| 361 total_len += lengths[i] + 1; | |
| 362 } | |
| 363 } | |
| 364 assert(total_len > 0, "empty sysclasspath not allowed"); | |
| 365 | |
| 366 // Copy the _items to a single string. | |
| 367 char* cp = NEW_C_HEAP_ARRAY(char, total_len); | |
| 368 char* cp_tmp = cp; | |
| 369 for (i = 0; i < _scp_nitems; ++i) { | |
| 370 if (_items[i] != NULL) { | |
| 371 memcpy(cp_tmp, _items[i], lengths[i]); | |
| 372 cp_tmp += lengths[i]; | |
| 373 *cp_tmp++ = separator; | |
| 374 } | |
| 375 } | |
| 376 *--cp_tmp = '\0'; // Replace the extra separator. | |
| 377 return cp; | |
| 378 } | |
| 379 | |
| 380 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. | |
| 381 char* | |
| 382 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) { | |
| 383 char *cp; | |
| 384 | |
| 385 assert(str != NULL, "just checking"); | |
| 386 if (path == NULL) { | |
| 387 size_t len = strlen(str) + 1; | |
| 388 cp = NEW_C_HEAP_ARRAY(char, len); | |
| 389 memcpy(cp, str, len); // copy the trailing null | |
| 390 } else { | |
| 391 const char separator = *os::path_separator(); | |
| 392 size_t old_len = strlen(path); | |
| 393 size_t str_len = strlen(str); | |
| 394 size_t len = old_len + str_len + 2; | |
| 395 | |
| 396 if (prepend) { | |
| 397 cp = NEW_C_HEAP_ARRAY(char, len); | |
| 398 char* cp_tmp = cp; | |
| 399 memcpy(cp_tmp, str, str_len); | |
| 400 cp_tmp += str_len; | |
| 401 *cp_tmp = separator; | |
| 402 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null | |
| 403 FREE_C_HEAP_ARRAY(char, path); | |
| 404 } else { | |
| 405 cp = REALLOC_C_HEAP_ARRAY(char, path, len); | |
| 406 char* cp_tmp = cp + old_len; | |
| 407 *cp_tmp = separator; | |
| 408 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null | |
| 409 } | |
| 410 } | |
| 411 return cp; | |
| 412 } | |
| 413 | |
| 414 // Scan the directory and append any jar or zip files found to path. | |
| 415 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. | |
| 416 char* SysClassPath::add_jars_to_path(char* path, const char* directory) { | |
| 417 DIR* dir = os::opendir(directory); | |
| 418 if (dir == NULL) return path; | |
| 419 | |
| 420 char dir_sep[2] = { '\0', '\0' }; | |
| 421 size_t directory_len = strlen(directory); | |
| 422 const char fileSep = *os::file_separator(); | |
| 423 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; | |
| 424 | |
| 425 /* Scan the directory for jars/zips, appending them to path. */ | |
| 426 struct dirent *entry; | |
| 427 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory)); | |
| 428 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { | |
| 429 const char* name = entry->d_name; | |
| 430 const char* ext = name + strlen(name) - 4; | |
| 431 bool isJarOrZip = ext > name && | |
| 432 (os::file_name_strcmp(ext, ".jar") == 0 || | |
| 433 os::file_name_strcmp(ext, ".zip") == 0); | |
| 434 if (isJarOrZip) { | |
| 435 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name)); | |
| 436 sprintf(jarpath, "%s%s%s", directory, dir_sep, name); | |
| 437 path = add_to_path(path, jarpath, false); | |
| 438 FREE_C_HEAP_ARRAY(char, jarpath); | |
| 439 } | |
| 440 } | |
| 441 FREE_C_HEAP_ARRAY(char, dbuf); | |
| 442 os::closedir(dir); | |
| 443 return path; | |
| 444 } | |
| 445 | |
| 446 // Parses a memory size specification string. | |
| 447 static bool atomll(const char *s, jlong* result) { | |
| 448 jlong n = 0; | |
| 449 int args_read = sscanf(s, os::jlong_format_specifier(), &n); | |
| 450 if (args_read != 1) { | |
| 451 return false; | |
| 452 } | |
| 453 while (*s != '\0' && isdigit(*s)) { | |
| 454 s++; | |
| 455 } | |
| 456 // 4705540: illegal if more characters are found after the first non-digit | |
| 457 if (strlen(s) > 1) { | |
| 458 return false; | |
| 459 } | |
| 460 switch (*s) { | |
| 461 case 'T': case 't': | |
| 462 *result = n * G * K; | |
| 463 return true; | |
| 464 case 'G': case 'g': | |
| 465 *result = n * G; | |
| 466 return true; | |
| 467 case 'M': case 'm': | |
| 468 *result = n * M; | |
| 469 return true; | |
| 470 case 'K': case 'k': | |
| 471 *result = n * K; | |
| 472 return true; | |
| 473 case '\0': | |
| 474 *result = n; | |
| 475 return true; | |
| 476 default: | |
| 477 return false; | |
| 478 } | |
| 479 } | |
| 480 | |
| 481 Arguments::ArgsRange Arguments::check_memory_size(jlong size, jlong min_size) { | |
| 482 if (size < min_size) return arg_too_small; | |
| 483 // Check that size will fit in a size_t (only relevant on 32-bit) | |
| 484 if ((julong) size > max_uintx) return arg_too_big; | |
| 485 return arg_in_range; | |
| 486 } | |
| 487 | |
| 488 // Describe an argument out of range error | |
| 489 void Arguments::describe_range_error(ArgsRange errcode) { | |
| 490 switch(errcode) { | |
| 491 case arg_too_big: | |
| 492 jio_fprintf(defaultStream::error_stream(), | |
| 493 "The specified size exceeds the maximum " | |
| 494 "representable size.\n"); | |
| 495 break; | |
| 496 case arg_too_small: | |
| 497 case arg_unreadable: | |
| 498 case arg_in_range: | |
| 499 // do nothing for now | |
| 500 break; | |
| 501 default: | |
| 502 ShouldNotReachHere(); | |
| 503 } | |
| 504 } | |
| 505 | |
| 506 static bool set_bool_flag(char* name, bool value, FlagValueOrigin origin) { | |
| 507 return CommandLineFlags::boolAtPut(name, &value, origin); | |
| 508 } | |
| 509 | |
| 510 | |
| 511 static bool set_fp_numeric_flag(char* name, char* value, FlagValueOrigin origin) { | |
| 512 double v; | |
| 513 if (sscanf(value, "%lf", &v) != 1) { | |
| 514 return false; | |
| 515 } | |
| 516 | |
| 517 if (CommandLineFlags::doubleAtPut(name, &v, origin)) { | |
| 518 return true; | |
| 519 } | |
| 520 return false; | |
| 521 } | |
| 522 | |
| 523 | |
| 524 static bool set_numeric_flag(char* name, char* value, FlagValueOrigin origin) { | |
| 525 jlong v; | |
| 526 intx intx_v; | |
| 527 bool is_neg = false; | |
| 528 // Check the sign first since atomll() parses only unsigned values. | |
| 529 if (*value == '-') { | |
| 530 if (!CommandLineFlags::intxAt(name, &intx_v)) { | |
| 531 return false; | |
| 532 } | |
| 533 value++; | |
| 534 is_neg = true; | |
| 535 } | |
| 536 if (!atomll(value, &v)) { | |
| 537 return false; | |
| 538 } | |
| 539 intx_v = (intx) v; | |
| 540 if (is_neg) { | |
| 541 intx_v = -intx_v; | |
| 542 } | |
| 543 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) { | |
| 544 return true; | |
| 545 } | |
| 546 uintx uintx_v = (uintx) v; | |
| 547 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) { | |
| 548 return true; | |
| 549 } | |
| 550 return false; | |
| 551 } | |
| 552 | |
| 553 | |
| 554 static bool set_string_flag(char* name, const char* value, FlagValueOrigin origin) { | |
| 555 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false; | |
| 556 // Contract: CommandLineFlags always returns a pointer that needs freeing. | |
| 557 FREE_C_HEAP_ARRAY(char, value); | |
| 558 return true; | |
| 559 } | |
| 560 | |
| 561 static bool append_to_string_flag(char* name, const char* new_value, FlagValueOrigin origin) { | |
| 562 const char* old_value = ""; | |
| 563 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false; | |
| 564 size_t old_len = old_value != NULL ? strlen(old_value) : 0; | |
| 565 size_t new_len = strlen(new_value); | |
| 566 const char* value; | |
| 567 char* free_this_too = NULL; | |
| 568 if (old_len == 0) { | |
| 569 value = new_value; | |
| 570 } else if (new_len == 0) { | |
| 571 value = old_value; | |
| 572 } else { | |
| 573 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1); | |
| 574 // each new setting adds another LINE to the switch: | |
| 575 sprintf(buf, "%s\n%s", old_value, new_value); | |
| 576 value = buf; | |
| 577 free_this_too = buf; | |
| 578 } | |
| 579 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); | |
| 580 // CommandLineFlags always returns a pointer that needs freeing. | |
| 581 FREE_C_HEAP_ARRAY(char, value); | |
| 582 if (free_this_too != NULL) { | |
| 583 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. | |
| 584 FREE_C_HEAP_ARRAY(char, free_this_too); | |
| 585 } | |
| 586 return true; | |
| 587 } | |
| 588 | |
| 589 | |
| 590 bool Arguments::parse_argument(const char* arg, FlagValueOrigin origin) { | |
| 591 | |
| 592 // range of acceptable characters spelled out for portability reasons | |
| 593 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" | |
| 594 #define BUFLEN 255 | |
| 595 char name[BUFLEN+1]; | |
| 596 char dummy; | |
| 597 | |
| 598 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { | |
| 599 return set_bool_flag(name, false, origin); | |
| 600 } | |
| 601 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { | |
| 602 return set_bool_flag(name, true, origin); | |
| 603 } | |
| 604 | |
| 605 char punct; | |
| 606 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { | |
| 607 const char* value = strchr(arg, '=') + 1; | |
| 608 Flag* flag = Flag::find_flag(name, strlen(name)); | |
| 609 if (flag != NULL && flag->is_ccstr()) { | |
| 610 if (flag->ccstr_accumulates()) { | |
| 611 return append_to_string_flag(name, value, origin); | |
| 612 } else { | |
| 613 if (value[0] == '\0') { | |
| 614 value = NULL; | |
| 615 } | |
| 616 return set_string_flag(name, value, origin); | |
| 617 } | |
| 618 } | |
| 619 } | |
| 620 | |
| 621 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { | |
| 622 const char* value = strchr(arg, '=') + 1; | |
| 623 // -XX:Foo:=xxx will reset the string flag to the given value. | |
| 624 if (value[0] == '\0') { | |
| 625 value = NULL; | |
| 626 } | |
| 627 return set_string_flag(name, value, origin); | |
| 628 } | |
| 629 | |
| 630 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" | |
| 631 #define SIGNED_NUMBER_RANGE "[-0123456789]" | |
| 632 #define NUMBER_RANGE "[0123456789]" | |
| 633 char value[BUFLEN + 1]; | |
| 634 char value2[BUFLEN + 1]; | |
| 635 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { | |
| 636 // Looks like a floating-point number -- try again with more lenient format string | |
| 637 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { | |
| 638 return set_fp_numeric_flag(name, value, origin); | |
| 639 } | |
| 640 } | |
| 641 | |
| 642 #define VALUE_RANGE "[-kmgtKMGT0123456789]" | |
| 643 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { | |
| 644 return set_numeric_flag(name, value, origin); | |
| 645 } | |
| 646 | |
| 647 return false; | |
| 648 } | |
| 649 | |
| 650 | |
| 651 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { | |
| 652 assert(bldarray != NULL, "illegal argument"); | |
| 653 | |
| 654 if (arg == NULL) { | |
| 655 return; | |
| 656 } | |
| 657 | |
| 658 int index = *count; | |
| 659 | |
| 660 // expand the array and add arg to the last element | |
| 661 (*count)++; | |
| 662 if (*bldarray == NULL) { | |
| 663 *bldarray = NEW_C_HEAP_ARRAY(char*, *count); | |
| 664 } else { | |
| 665 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, *count); | |
| 666 } | |
| 667 (*bldarray)[index] = strdup(arg); | |
| 668 } | |
| 669 | |
| 670 void Arguments::build_jvm_args(const char* arg) { | |
| 671 add_string(&_jvm_args_array, &_num_jvm_args, arg); | |
| 672 } | |
| 673 | |
| 674 void Arguments::build_jvm_flags(const char* arg) { | |
| 675 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); | |
| 676 } | |
| 677 | |
| 678 // utility function to return a string that concatenates all | |
| 679 // strings in a given char** array | |
| 680 const char* Arguments::build_resource_string(char** args, int count) { | |
| 681 if (args == NULL || count == 0) { | |
| 682 return NULL; | |
| 683 } | |
| 684 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator | |
| 685 for (int i = 1; i < count; i++) { | |
| 686 length += strlen(args[i]) + 1; // add 1 for a space | |
| 687 } | |
| 688 char* s = NEW_RESOURCE_ARRAY(char, length); | |
| 689 strcpy(s, args[0]); | |
| 690 for (int j = 1; j < count; j++) { | |
| 691 strcat(s, " "); | |
| 692 strcat(s, args[j]); | |
| 693 } | |
| 694 return (const char*) s; | |
| 695 } | |
| 696 | |
| 697 void Arguments::print_on(outputStream* st) { | |
| 698 st->print_cr("VM Arguments:"); | |
| 699 if (num_jvm_flags() > 0) { | |
| 700 st->print("jvm_flags: "); print_jvm_flags_on(st); | |
| 701 } | |
| 702 if (num_jvm_args() > 0) { | |
| 703 st->print("jvm_args: "); print_jvm_args_on(st); | |
| 704 } | |
| 705 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); | |
| 706 st->print_cr("Launcher Type: %s", _sun_java_launcher); | |
| 707 } | |
| 708 | |
| 709 void Arguments::print_jvm_flags_on(outputStream* st) { | |
| 710 if (_num_jvm_flags > 0) { | |
| 711 for (int i=0; i < _num_jvm_flags; i++) { | |
| 712 st->print("%s ", _jvm_flags_array[i]); | |
| 713 } | |
| 714 st->print_cr(""); | |
| 715 } | |
| 716 } | |
| 717 | |
| 718 void Arguments::print_jvm_args_on(outputStream* st) { | |
| 719 if (_num_jvm_args > 0) { | |
| 720 for (int i=0; i < _num_jvm_args; i++) { | |
| 721 st->print("%s ", _jvm_args_array[i]); | |
| 722 } | |
| 723 st->print_cr(""); | |
| 724 } | |
| 725 } | |
| 726 | |
| 242 | 727 bool Arguments::process_argument(const char* arg, |
| 728 jboolean ignore_unrecognized, FlagValueOrigin origin) { | |
| 729 | |
| 730 JDK_Version since = JDK_Version(); | |
| 0 | 731 |
| 732 if (parse_argument(arg, origin)) { | |
| 733 // do nothing | |
| 242 | 734 } else if (is_newly_obsolete(arg, &since)) { |
| 735 enum { bufsize = 256 }; | |
| 736 char buffer[bufsize]; | |
| 737 since.to_string(buffer, bufsize); | |
| 0 | 738 jio_fprintf(defaultStream::error_stream(), |
| 242 | 739 "Warning: The flag %s has been EOL'd as of %s and will" |
| 740 " be ignored\n", arg, buffer); | |
| 0 | 741 } else { |
| 742 if (!ignore_unrecognized) { | |
| 743 jio_fprintf(defaultStream::error_stream(), | |
| 744 "Unrecognized VM option '%s'\n", arg); | |
| 745 // allow for commandline "commenting out" options like -XX:#+Verbose | |
| 746 if (strlen(arg) == 0 || arg[0] != '#') { | |
| 747 return false; | |
| 748 } | |
| 749 } | |
| 750 } | |
| 751 return true; | |
| 752 } | |
| 753 | |
| 754 | |
| 755 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { | |
| 756 FILE* stream = fopen(file_name, "rb"); | |
| 757 if (stream == NULL) { | |
| 758 if (should_exist) { | |
| 759 jio_fprintf(defaultStream::error_stream(), | |
| 760 "Could not open settings file %s\n", file_name); | |
| 761 return false; | |
| 762 } else { | |
| 763 return true; | |
| 764 } | |
| 765 } | |
| 766 | |
| 767 char token[1024]; | |
| 768 int pos = 0; | |
| 769 | |
| 770 bool in_white_space = true; | |
| 771 bool in_comment = false; | |
| 772 bool in_quote = false; | |
| 773 char quote_c = 0; | |
| 774 bool result = true; | |
| 775 | |
| 776 int c = getc(stream); | |
| 777 while(c != EOF) { | |
| 778 if (in_white_space) { | |
| 779 if (in_comment) { | |
| 780 if (c == '\n') in_comment = false; | |
| 781 } else { | |
| 782 if (c == '#') in_comment = true; | |
| 783 else if (!isspace(c)) { | |
| 784 in_white_space = false; | |
| 785 token[pos++] = c; | |
| 786 } | |
| 787 } | |
| 788 } else { | |
| 789 if (c == '\n' || (!in_quote && isspace(c))) { | |
| 790 // token ends at newline, or at unquoted whitespace | |
| 791 // this allows a way to include spaces in string-valued options | |
| 792 token[pos] = '\0'; | |
| 793 logOption(token); | |
| 794 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); | |
| 795 build_jvm_flags(token); | |
| 796 pos = 0; | |
| 797 in_white_space = true; | |
| 798 in_quote = false; | |
| 799 } else if (!in_quote && (c == '\'' || c == '"')) { | |
| 800 in_quote = true; | |
| 801 quote_c = c; | |
| 802 } else if (in_quote && (c == quote_c)) { | |
| 803 in_quote = false; | |
| 804 } else { | |
| 805 token[pos++] = c; | |
| 806 } | |
| 807 } | |
| 808 c = getc(stream); | |
| 809 } | |
| 810 if (pos > 0) { | |
| 811 token[pos] = '\0'; | |
| 812 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); | |
| 813 build_jvm_flags(token); | |
| 814 } | |
| 815 fclose(stream); | |
| 816 return result; | |
| 817 } | |
| 818 | |
| 819 //============================================================================================================= | |
| 820 // Parsing of properties (-D) | |
| 821 | |
| 822 const char* Arguments::get_property(const char* key) { | |
| 823 return PropertyList_get_value(system_properties(), key); | |
| 824 } | |
| 825 | |
| 826 bool Arguments::add_property(const char* prop) { | |
| 827 const char* eq = strchr(prop, '='); | |
| 828 char* key; | |
| 829 // ns must be static--its address may be stored in a SystemProperty object. | |
| 830 const static char ns[1] = {0}; | |
| 831 char* value = (char *)ns; | |
| 832 | |
| 833 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop); | |
| 834 key = AllocateHeap(key_len + 1, "add_property"); | |
| 835 strncpy(key, prop, key_len); | |
| 836 key[key_len] = '\0'; | |
| 837 | |
| 838 if (eq != NULL) { | |
| 839 size_t value_len = strlen(prop) - key_len - 1; | |
| 840 value = AllocateHeap(value_len + 1, "add_property"); | |
| 841 strncpy(value, &prop[key_len + 1], value_len + 1); | |
| 842 } | |
| 843 | |
| 844 if (strcmp(key, "java.compiler") == 0) { | |
| 845 process_java_compiler_argument(value); | |
| 846 FreeHeap(key); | |
| 847 if (eq != NULL) { | |
| 848 FreeHeap(value); | |
| 849 } | |
| 850 return true; | |
| 851 } | |
| 852 else if (strcmp(key, "sun.java.command") == 0) { | |
| 853 | |
| 854 _java_command = value; | |
| 855 | |
| 856 // don't add this property to the properties exposed to the java application | |
| 857 FreeHeap(key); | |
| 858 return true; | |
| 859 } | |
| 860 else if (strcmp(key, "sun.java.launcher.pid") == 0) { | |
| 861 // launcher.pid property is private and is processed | |
| 862 // in process_sun_java_launcher_properties(); | |
| 863 // the sun.java.launcher property is passed on to the java application | |
| 864 FreeHeap(key); | |
| 865 if (eq != NULL) { | |
| 866 FreeHeap(value); | |
| 867 } | |
| 868 return true; | |
| 869 } | |
| 870 else if (strcmp(key, "java.vendor.url.bug") == 0) { | |
| 871 // save it in _java_vendor_url_bug, so JVM fatal error handler can access | |
| 872 // its value without going through the property list or making a Java call. | |
| 873 _java_vendor_url_bug = value; | |
| 874 } | |
| 875 | |
| 876 // Create new property and add at the end of the list | |
| 877 PropertyList_unique_add(&_system_properties, key, value); | |
| 878 return true; | |
| 879 } | |
| 880 | |
| 881 //=========================================================================================================== | |
| 882 // Setting int/mixed/comp mode flags | |
| 883 | |
| 884 void Arguments::set_mode_flags(Mode mode) { | |
| 885 // Set up default values for all flags. | |
| 886 // If you add a flag to any of the branches below, | |
| 887 // add a default value for it here. | |
| 888 set_java_compiler(false); | |
| 889 _mode = mode; | |
| 890 | |
| 891 // Ensure Agent_OnLoad has the correct initial values. | |
| 892 // This may not be the final mode; mode may change later in onload phase. | |
| 893 PropertyList_unique_add(&_system_properties, "java.vm.info", | |
| 894 (char*)Abstract_VM_Version::vm_info_string()); | |
| 895 | |
| 896 UseInterpreter = true; | |
| 897 UseCompiler = true; | |
| 898 UseLoopCounter = true; | |
| 899 | |
| 900 // Default values may be platform/compiler dependent - | |
| 901 // use the saved values | |
| 902 ClipInlining = Arguments::_ClipInlining; | |
| 903 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; | |
| 904 UseOnStackReplacement = Arguments::_UseOnStackReplacement; | |
| 905 BackgroundCompilation = Arguments::_BackgroundCompilation; | |
| 906 Tier2CompileThreshold = Arguments::_Tier2CompileThreshold; | |
| 907 | |
| 908 // Change from defaults based on mode | |
| 909 switch (mode) { | |
| 910 default: | |
| 911 ShouldNotReachHere(); | |
| 912 break; | |
| 913 case _int: | |
| 914 UseCompiler = false; | |
| 915 UseLoopCounter = false; | |
| 916 AlwaysCompileLoopMethods = false; | |
| 917 UseOnStackReplacement = false; | |
| 918 break; | |
| 919 case _mixed: | |
| 920 // same as default | |
| 921 break; | |
| 922 case _comp: | |
| 923 UseInterpreter = false; | |
| 924 BackgroundCompilation = false; | |
| 925 ClipInlining = false; | |
| 926 break; | |
| 927 } | |
| 928 } | |
| 929 | |
| 930 | |
| 931 // Conflict: required to use shared spaces (-Xshare:on), but | |
| 932 // incompatible command line options were chosen. | |
| 933 | |
| 934 static void no_shared_spaces() { | |
| 935 if (RequireSharedSpaces) { | |
| 936 jio_fprintf(defaultStream::error_stream(), | |
| 937 "Class data sharing is inconsistent with other specified options.\n"); | |
| 938 vm_exit_during_initialization("Unable to use shared archive.", NULL); | |
| 939 } else { | |
| 940 FLAG_SET_DEFAULT(UseSharedSpaces, false); | |
| 941 } | |
| 942 } | |
| 943 | |
| 944 | |
| 945 // If the user has chosen ParallelGCThreads > 0, we set UseParNewGC | |
| 946 // if it's not explictly set or unset. If the user has chosen | |
| 947 // UseParNewGC and not explicitly set ParallelGCThreads we | |
| 948 // set it, unless this is a single cpu machine. | |
| 949 void Arguments::set_parnew_gc_flags() { | |
|
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950 assert(!UseSerialGC && !UseParallelGC && !UseG1GC, |
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951 "control point invariant"); |
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952 assert(UseParNewGC, "Error"); |
| 0 | 953 |
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954 // Turn off AdaptiveSizePolicy by default for parnew until it is |
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955 // complete. |
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956 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
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957 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
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958 } |
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959 |
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960 if (ParallelGCThreads == 0) { |
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961 FLAG_SET_DEFAULT(ParallelGCThreads, |
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962 Abstract_VM_Version::parallel_worker_threads()); |
| 0 | 963 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { |
| 964 FLAG_SET_DEFAULT(UseParNewGC, false); | |
| 965 } | |
| 966 } | |
| 967 if (!UseParNewGC) { | |
| 968 FLAG_SET_DEFAULT(ParallelGCThreads, 0); | |
| 969 } else { | |
| 970 no_shared_spaces(); | |
| 971 | |
| 972 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 correspondinly, | |
| 973 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration | |
| 974 // we set them to 1024 and 1024. | |
| 975 // See CR 6362902. | |
| 976 if (FLAG_IS_DEFAULT(YoungPLABSize)) { | |
| 977 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); | |
| 978 } | |
| 979 if (FLAG_IS_DEFAULT(OldPLABSize)) { | |
| 980 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); | |
| 981 } | |
| 982 | |
| 983 // AlwaysTenure flag should make ParNew to promote all at first collection. | |
| 984 // See CR 6362902. | |
| 985 if (AlwaysTenure) { | |
| 986 FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0); | |
| 987 } | |
| 988 } | |
| 989 } | |
| 990 | |
| 991 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on | |
| 992 // sparc/solaris for certain applications, but would gain from | |
| 993 // further optimization and tuning efforts, and would almost | |
| 994 // certainly gain from analysis of platform and environment. | |
| 995 void Arguments::set_cms_and_parnew_gc_flags() { | |
|
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996 assert(!UseSerialGC && !UseParallelGC, "Error"); |
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997 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); |
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998 |
| 0 | 999 // If we are using CMS, we prefer to UseParNewGC, |
| 1000 // unless explicitly forbidden. | |
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1001 if (FLAG_IS_DEFAULT(UseParNewGC)) { |
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1002 FLAG_SET_ERGO(bool, UseParNewGC, true); |
| 0 | 1003 } |
| 1004 | |
| 1005 // Turn off AdaptiveSizePolicy by default for cms until it is | |
|
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1006 // complete. |
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1007 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
| 0 | 1008 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
| 1009 } | |
| 1010 | |
| 1011 // In either case, adjust ParallelGCThreads and/or UseParNewGC | |
| 1012 // as needed. | |
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1013 if (UseParNewGC) { |
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1014 set_parnew_gc_flags(); |
| 0 | 1015 } |
| 1016 | |
| 1017 // Now make adjustments for CMS | |
| 1018 size_t young_gen_per_worker; | |
| 1019 intx new_ratio; | |
| 1020 size_t min_new_default; | |
| 1021 intx tenuring_default; | |
| 1022 if (CMSUseOldDefaults) { // old defaults: "old" as of 6.0 | |
| 1023 if FLAG_IS_DEFAULT(CMSYoungGenPerWorker) { | |
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1024 FLAG_SET_ERGO(intx, CMSYoungGenPerWorker, 4*M); |
| 0 | 1025 } |
| 1026 young_gen_per_worker = 4*M; | |
| 1027 new_ratio = (intx)15; | |
| 1028 min_new_default = 4*M; | |
| 1029 tenuring_default = (intx)0; | |
| 1030 } else { // new defaults: "new" as of 6.0 | |
| 1031 young_gen_per_worker = CMSYoungGenPerWorker; | |
| 1032 new_ratio = (intx)7; | |
| 1033 min_new_default = 16*M; | |
| 1034 tenuring_default = (intx)4; | |
| 1035 } | |
| 1036 | |
| 1037 // Preferred young gen size for "short" pauses | |
| 1038 const uintx parallel_gc_threads = | |
| 1039 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); | |
| 1040 const size_t preferred_max_new_size_unaligned = | |
| 1041 ScaleForWordSize(young_gen_per_worker * parallel_gc_threads); | |
| 1042 const size_t preferred_max_new_size = | |
| 1043 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); | |
| 1044 | |
| 1045 // Unless explicitly requested otherwise, size young gen | |
| 1046 // for "short" pauses ~ 4M*ParallelGCThreads | |
| 1047 if (FLAG_IS_DEFAULT(MaxNewSize)) { // MaxNewSize not set at command-line | |
| 1048 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line | |
|
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1049 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); |
| 0 | 1050 } else { |
|
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1051 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size); |
| 0 | 1052 } |
|
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1053 if(PrintGCDetails && Verbose) { |
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1054 // Too early to use gclog_or_tty |
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1055 tty->print_cr("Ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); |
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1056 } |
| 0 | 1057 } |
| 1058 // Unless explicitly requested otherwise, prefer a large | |
| 1059 // Old to Young gen size so as to shift the collection load | |
| 1060 // to the old generation concurrent collector | |
| 1061 if (FLAG_IS_DEFAULT(NewRatio)) { | |
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1062 FLAG_SET_ERGO(intx, NewRatio, MAX2(NewRatio, new_ratio)); |
| 0 | 1063 |
| 1064 size_t min_new = align_size_up(ScaleForWordSize(min_new_default), os::vm_page_size()); | |
| 1065 size_t prev_initial_size = initial_heap_size(); | |
| 1066 if (prev_initial_size != 0 && prev_initial_size < min_new+OldSize) { | |
| 1067 set_initial_heap_size(min_new+OldSize); | |
| 1068 // Currently minimum size and the initial heap sizes are the same. | |
| 1069 set_min_heap_size(initial_heap_size()); | |
| 1070 if (PrintGCDetails && Verbose) { | |
| 1071 warning("Initial heap size increased to " SIZE_FORMAT " M from " | |
| 1072 SIZE_FORMAT " M; use -XX:NewSize=... for finer control.", | |
| 1073 initial_heap_size()/M, prev_initial_size/M); | |
| 1074 } | |
| 1075 } | |
| 1076 // MaxHeapSize is aligned down in collectorPolicy | |
| 1077 size_t max_heap = align_size_down(MaxHeapSize, | |
| 1078 CardTableRS::ct_max_alignment_constraint()); | |
| 1079 | |
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1080 if(PrintGCDetails && Verbose) { |
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1081 // Too early to use gclog_or_tty |
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1082 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT |
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1083 " initial_heap_size: " SIZE_FORMAT |
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1084 " max_heap: " SIZE_FORMAT, |
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1085 min_heap_size(), initial_heap_size(), max_heap); |
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1086 } |
| 0 | 1087 if (max_heap > min_new) { |
| 1088 // Unless explicitly requested otherwise, make young gen | |
| 1089 // at least min_new, and at most preferred_max_new_size. | |
| 1090 if (FLAG_IS_DEFAULT(NewSize)) { | |
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1091 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new)); |
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1092 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize)); |
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1093 if(PrintGCDetails && Verbose) { |
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1094 // Too early to use gclog_or_tty |
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1095 tty->print_cr("Ergo set NewSize: " SIZE_FORMAT, NewSize); |
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1096 } |
| 0 | 1097 } |
| 1098 // Unless explicitly requested otherwise, size old gen | |
| 1099 // so that it's at least 3X of NewSize to begin with; | |
| 1100 // later NewRatio will decide how it grows; see above. | |
| 1101 if (FLAG_IS_DEFAULT(OldSize)) { | |
| 1102 if (max_heap > NewSize) { | |
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1103 FLAG_SET_ERGO(uintx, OldSize, MIN2(3*NewSize, max_heap - NewSize)); |
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1104 if(PrintGCDetails && Verbose) { |
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1105 // Too early to use gclog_or_tty |
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1106 tty->print_cr("Ergo set OldSize: " SIZE_FORMAT, OldSize); |
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1107 } |
| 0 | 1108 } |
| 1109 } | |
| 1110 } | |
| 1111 } | |
| 1112 // Unless explicitly requested otherwise, definitely | |
| 1113 // promote all objects surviving "tenuring_default" scavenges. | |
| 1114 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && | |
| 1115 FLAG_IS_DEFAULT(SurvivorRatio)) { | |
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1116 FLAG_SET_ERGO(intx, MaxTenuringThreshold, tenuring_default); |
| 0 | 1117 } |
| 1118 // If we decided above (or user explicitly requested) | |
| 1119 // `promote all' (via MaxTenuringThreshold := 0), | |
| 1120 // prefer minuscule survivor spaces so as not to waste | |
| 1121 // space for (non-existent) survivors | |
| 1122 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { | |
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1123 FLAG_SET_ERGO(intx, SurvivorRatio, MAX2((intx)1024, SurvivorRatio)); |
| 0 | 1124 } |
| 1125 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, | |
| 1126 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. | |
| 1127 // This is done in order to make ParNew+CMS configuration to work | |
| 1128 // with YoungPLABSize and OldPLABSize options. | |
| 1129 // See CR 6362902. | |
| 1130 if (!FLAG_IS_DEFAULT(OldPLABSize)) { | |
| 1131 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { | |
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1132 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim |
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1133 // is. In this situtation let CMSParPromoteBlocksToClaim follow |
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1134 // the value (either from the command line or ergonomics) of |
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1135 // OldPLABSize. Following OldPLABSize is an ergonomics decision. |
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1136 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); |
| 0 | 1137 } |
| 1138 else { | |
| 1139 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. | |
| 1140 // CMSParPromoteBlocksToClaim is a collector-specific flag, so | |
| 1141 // we'll let it to take precedence. | |
| 1142 jio_fprintf(defaultStream::error_stream(), | |
| 1143 "Both OldPLABSize and CMSParPromoteBlocksToClaim options are specified " | |
| 1144 "for the CMS collector. CMSParPromoteBlocksToClaim will take precedence.\n"); | |
| 1145 } | |
| 1146 } | |
| 1147 } | |
| 1148 | |
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1149 inline uintx max_heap_for_compressed_oops() { |
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1150 LP64_ONLY(return oopDesc::OopEncodingHeapMax - MaxPermSize - os::vm_page_size()); |
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1151 NOT_LP64(return DefaultMaxRAM); |
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1152 } |
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1153 |
| 0 | 1154 bool Arguments::should_auto_select_low_pause_collector() { |
| 1155 if (UseAutoGCSelectPolicy && | |
| 1156 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && | |
| 1157 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { | |
| 1158 if (PrintGCDetails) { | |
| 1159 // Cannot use gclog_or_tty yet. | |
| 1160 tty->print_cr("Automatic selection of the low pause collector" | |
| 1161 " based on pause goal of %d (ms)", MaxGCPauseMillis); | |
| 1162 } | |
| 1163 return true; | |
| 1164 } | |
| 1165 return false; | |
| 1166 } | |
| 1167 | |
| 1168 void Arguments::set_ergonomics_flags() { | |
| 1169 // Parallel GC is not compatible with sharing. If one specifies | |
| 1170 // that they want sharing explicitly, do not set ergonmics flags. | |
| 1171 if (DumpSharedSpaces || ForceSharedSpaces) { | |
| 1172 return; | |
| 1173 } | |
| 1174 | |
| 1175 if (os::is_server_class_machine() && !force_client_mode ) { | |
| 1176 // If no other collector is requested explicitly, | |
| 1177 // let the VM select the collector based on | |
| 1178 // machine class and automatic selection policy. | |
| 1179 if (!UseSerialGC && | |
| 1180 !UseConcMarkSweepGC && | |
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1181 !UseG1GC && |
| 0 | 1182 !UseParNewGC && |
| 1183 !DumpSharedSpaces && | |
| 1184 FLAG_IS_DEFAULT(UseParallelGC)) { | |
| 1185 if (should_auto_select_low_pause_collector()) { | |
| 1186 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); | |
| 1187 } else { | |
| 1188 FLAG_SET_ERGO(bool, UseParallelGC, true); | |
| 1189 } | |
| 1190 no_shared_spaces(); | |
| 1191 } | |
| 1192 } | |
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1193 |
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1194 #ifdef _LP64 |
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1195 // Compressed Headers do not work with CMS, which uses a bit in the klass |
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1196 // field offset to determine free list chunk markers. |
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1197 // Check that UseCompressedOops can be set with the max heap size allocated |
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1198 // by ergonomics. |
| 187 | 1199 if (MaxHeapSize <= max_heap_for_compressed_oops()) { |
| 344 | 1200 if (FLAG_IS_DEFAULT(UseCompressedOops) && !UseG1GC) { |
| 239 | 1201 // Turn off until bug is fixed. |
| 185 | 1202 // the following line to return it to default status. |
| 239 | 1203 // FLAG_SET_ERGO(bool, UseCompressedOops, true); |
| 344 | 1204 } else if (UseCompressedOops && UseG1GC) { |
| 1205 warning(" UseCompressedOops does not currently work with UseG1GC; switching off UseCompressedOops. "); | |
| 1206 FLAG_SET_DEFAULT(UseCompressedOops, false); | |
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1207 } |
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1208 #ifdef _WIN64 |
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1209 if (UseLargePages && UseCompressedOops) { |
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1210 // Cannot allocate guard pages for implicit checks in indexed addressing |
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1211 // mode, when large pages are specified on windows. |
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1212 FLAG_SET_DEFAULT(UseImplicitNullCheckForNarrowOop, false); |
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1213 } |
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1214 #endif // _WIN64 |
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1215 } else { |
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1216 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { |
| 344 | 1217 warning("Max heap size too large for Compressed Oops"); |
|
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1218 FLAG_SET_DEFAULT(UseCompressedOops, false); |
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1219 } |
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1220 } |
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1221 // Also checks that certain machines are slower with compressed oops |
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1222 // in vm_version initialization code. |
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1223 #endif // _LP64 |
| 0 | 1224 } |
| 1225 | |
| 1226 void Arguments::set_parallel_gc_flags() { | |
|
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1227 assert(UseParallelGC || UseParallelOldGC, "Error"); |
| 0 | 1228 // If parallel old was requested, automatically enable parallel scavenge. |
| 1229 if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) { | |
| 1230 FLAG_SET_DEFAULT(UseParallelGC, true); | |
| 1231 } | |
| 1232 | |
| 1233 // If no heap maximum was requested explicitly, use some reasonable fraction | |
| 1234 // of the physical memory, up to a maximum of 1GB. | |
| 1235 if (UseParallelGC) { | |
|
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1236 FLAG_SET_ERGO(uintx, ParallelGCThreads, |
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1237 Abstract_VM_Version::parallel_worker_threads()); |
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1238 |
|
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1239 // PS is a server collector, setup the heap sizes accordingly. |
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1240 set_server_heap_size(); |
| 0 | 1241 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the |
| 1242 // SurvivorRatio has been set, reset their default values to SurvivorRatio + | |
| 1243 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. | |
| 1244 // See CR 6362902 for details. | |
| 1245 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { | |
| 1246 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { | |
| 1247 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); | |
| 1248 } | |
| 1249 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { | |
| 1250 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); | |
| 1251 } | |
| 1252 } | |
| 1253 | |
| 1254 if (UseParallelOldGC) { | |
| 1255 // Par compact uses lower default values since they are treated as | |
|
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1256 // minimums. These are different defaults because of the different |
|
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1257 // interpretation and are not ergonomically set. |
| 0 | 1258 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { |
|
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1259 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); |
| 0 | 1260 } |
| 1261 if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) { | |
|
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1262 FLAG_SET_DEFAULT(PermMarkSweepDeadRatio, 5); |
| 0 | 1263 } |
| 1264 } | |
| 1265 } | |
| 1266 } | |
| 1267 | |
|
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1268 void Arguments::set_g1_gc_flags() { |
|
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1269 assert(UseG1GC, "Error"); |
|
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1270 // G1 is a server collector, setup the heap sizes accordingly. |
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1271 set_server_heap_size(); |
|
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1272 #ifdef COMPILER1 |
|
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1273 FastTLABRefill = false; |
|
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1274 #endif |
|
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1275 FLAG_SET_DEFAULT(ParallelGCThreads, |
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1276 Abstract_VM_Version::parallel_worker_threads()); |
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1277 if (ParallelGCThreads == 0) { |
|
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1278 FLAG_SET_DEFAULT(ParallelGCThreads, |
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1279 Abstract_VM_Version::parallel_worker_threads |
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1280 ()); |
|
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1281 } |
|
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1282 no_shared_spaces(); |
|
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1283 } |
|
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1284 |
|
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1285 void Arguments::set_server_heap_size() { |
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1286 if (FLAG_IS_DEFAULT(MaxHeapSize)) { |
|
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1287 const uint64_t reasonable_fraction = |
|
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1288 os::physical_memory() / DefaultMaxRAMFraction; |
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1289 const uint64_t maximum_size = (uint64_t) |
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1290 (FLAG_IS_DEFAULT(DefaultMaxRAM) && UseCompressedOops ? |
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1291 MIN2(max_heap_for_compressed_oops(), DefaultMaxRAM) : |
|
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1292 DefaultMaxRAM); |
|
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1293 size_t reasonable_max = |
|
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1294 (size_t) os::allocatable_physical_memory(reasonable_fraction); |
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1295 if (reasonable_max > maximum_size) { |
|
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1296 reasonable_max = maximum_size; |
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1297 } |
|
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1298 if (PrintGCDetails && Verbose) { |
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1299 // Cannot use gclog_or_tty yet. |
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1300 tty->print_cr(" Max heap size for server class platform " |
|
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1301 SIZE_FORMAT, reasonable_max); |
|
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1302 } |
|
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1303 // If the initial_heap_size has not been set with -Xms, |
|
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1304 // then set it as fraction of size of physical memory |
|
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1305 // respecting the maximum and minimum sizes of the heap. |
|
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1306 if (initial_heap_size() == 0) { |
|
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1307 const uint64_t reasonable_initial_fraction = |
|
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1308 os::physical_memory() / DefaultInitialRAMFraction; |
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1309 const size_t reasonable_initial = |
|
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1310 (size_t) os::allocatable_physical_memory(reasonable_initial_fraction); |
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1311 const size_t minimum_size = NewSize + OldSize; |
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1312 set_initial_heap_size(MAX2(MIN2(reasonable_initial, reasonable_max), |
|
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1313 minimum_size)); |
|
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1314 // Currently the minimum size and the initial heap sizes are the same. |
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1315 set_min_heap_size(initial_heap_size()); |
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1316 if (PrintGCDetails && Verbose) { |
|
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1317 // Cannot use gclog_or_tty yet. |
|
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1318 tty->print_cr(" Initial heap size for server class platform " |
|
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1319 SIZE_FORMAT, initial_heap_size()); |
|
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1320 } |
|
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1321 } else { |
|
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1322 // A minimum size was specified on the command line. Be sure |
|
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1323 // that the maximum size is consistent. |
|
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1324 if (initial_heap_size() > reasonable_max) { |
|
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1325 reasonable_max = initial_heap_size(); |
|
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1326 } |
|
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1327 } |
|
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1328 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx) reasonable_max); |
|
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1329 } |
|
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1330 } |
|
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1331 |
| 0 | 1332 // This must be called after ergonomics because we want bytecode rewriting |
| 1333 // if the server compiler is used, or if UseSharedSpaces is disabled. | |
| 1334 void Arguments::set_bytecode_flags() { | |
| 1335 // Better not attempt to store into a read-only space. | |
| 1336 if (UseSharedSpaces) { | |
| 1337 FLAG_SET_DEFAULT(RewriteBytecodes, false); | |
| 1338 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
| 1339 } | |
| 1340 | |
| 1341 if (!RewriteBytecodes) { | |
| 1342 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
| 1343 } | |
| 1344 } | |
| 1345 | |
| 1346 // Aggressive optimization flags -XX:+AggressiveOpts | |
| 1347 void Arguments::set_aggressive_opts_flags() { | |
|
17
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1348 #ifdef COMPILER2 |
|
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1349 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
|
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1350 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { |
|
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|
1351 FLAG_SET_DEFAULT(EliminateAutoBox, true); |
|
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1352 } |
|
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1353 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
|
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1354 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); |
|
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1355 } |
|
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1356 |
|
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1357 // Feed the cache size setting into the JDK |
|
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1358 char buffer[1024]; |
|
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1359 sprintf(buffer, "java.lang.Integer.IntegerCache.high=%d", AutoBoxCacheMax); |
|
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1360 add_property(buffer); |
|
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1361 } |
| 65 | 1362 if (AggressiveOpts && FLAG_IS_DEFAULT(DoEscapeAnalysis)) { |
| 1363 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); | |
| 1364 } | |
|
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1365 if (AggressiveOpts && FLAG_IS_DEFAULT(SpecialArraysEquals)) { |
|
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1366 FLAG_SET_DEFAULT(SpecialArraysEquals, true); |
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1367 } |
|
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1368 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { |
|
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1369 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); |
|
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1370 } |
|
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1371 #endif |
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1372 |
| 0 | 1373 if (AggressiveOpts) { |
| 61 | 1374 // Sample flag setting code |
| 1375 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { | |
| 1376 // FLAG_SET_DEFAULT(EliminateZeroing, true); | |
| 1377 // } | |
| 0 | 1378 } |
| 1379 } | |
| 1380 | |
| 1381 //=========================================================================================================== | |
| 1382 // Parsing of java.compiler property | |
| 1383 | |
| 1384 void Arguments::process_java_compiler_argument(char* arg) { | |
| 1385 // For backwards compatibility, Djava.compiler=NONE or "" | |
| 1386 // causes us to switch to -Xint mode UNLESS -Xdebug | |
| 1387 // is also specified. | |
| 1388 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { | |
| 1389 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. | |
| 1390 } | |
| 1391 } | |
| 1392 | |
| 1393 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { | |
| 1394 _sun_java_launcher = strdup(launcher); | |
| 1395 } | |
| 1396 | |
| 1397 bool Arguments::created_by_java_launcher() { | |
| 1398 assert(_sun_java_launcher != NULL, "property must have value"); | |
| 1399 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; | |
| 1400 } | |
| 1401 | |
| 1402 //=========================================================================================================== | |
| 1403 // Parsing of main arguments | |
| 1404 | |
| 1405 bool Arguments::verify_percentage(uintx value, const char* name) { | |
| 1406 if (value <= 100) { | |
| 1407 return true; | |
| 1408 } | |
| 1409 jio_fprintf(defaultStream::error_stream(), | |
| 1410 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", | |
| 1411 name, value); | |
| 1412 return false; | |
| 1413 } | |
| 1414 | |
| 1415 static void set_serial_gc_flags() { | |
| 1416 FLAG_SET_DEFAULT(UseSerialGC, true); | |
| 1417 FLAG_SET_DEFAULT(UseParNewGC, false); | |
| 1418 FLAG_SET_DEFAULT(UseConcMarkSweepGC, false); | |
| 1419 FLAG_SET_DEFAULT(UseParallelGC, false); | |
| 1420 FLAG_SET_DEFAULT(UseParallelOldGC, false); | |
|
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1421 FLAG_SET_DEFAULT(UseG1GC, false); |
| 0 | 1422 } |
| 1423 | |
| 1424 static bool verify_serial_gc_flags() { | |
| 1425 return (UseSerialGC && | |
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1426 !(UseParNewGC || UseConcMarkSweepGC || UseG1GC || |
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1427 UseParallelGC || UseParallelOldGC)); |
| 0 | 1428 } |
| 1429 | |
|
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1430 // Check consistency of GC selection |
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1431 bool Arguments::check_gc_consistency() { |
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1432 bool status = true; |
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1433 // Ensure that the user has not selected conflicting sets |
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1434 // of collectors. [Note: this check is merely a user convenience; |
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1435 // collectors over-ride each other so that only a non-conflicting |
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1436 // set is selected; however what the user gets is not what they |
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1437 // may have expected from the combination they asked for. It's |
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1438 // better to reduce user confusion by not allowing them to |
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1439 // select conflicting combinations. |
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1440 uint i = 0; |
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1441 if (UseSerialGC) i++; |
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1442 if (UseConcMarkSweepGC || UseParNewGC) i++; |
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1443 if (UseParallelGC || UseParallelOldGC) i++; |
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1444 if (i > 1) { |
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1445 jio_fprintf(defaultStream::error_stream(), |
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1446 "Conflicting collector combinations in option list; " |
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1447 "please refer to the release notes for the combinations " |
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1448 "allowed\n"); |
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1449 status = false; |
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1450 } |
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1451 |
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1452 return status; |
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1453 } |
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1454 |
| 0 | 1455 // Check the consistency of vm_init_args |
| 1456 bool Arguments::check_vm_args_consistency() { | |
| 1457 // Method for adding checks for flag consistency. | |
| 1458 // The intent is to warn the user of all possible conflicts, | |
| 1459 // before returning an error. | |
| 1460 // Note: Needs platform-dependent factoring. | |
| 1461 bool status = true; | |
| 1462 | |
| 1463 #if ( (defined(COMPILER2) && defined(SPARC))) | |
| 1464 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init | |
| 1465 // on sparc doesn't require generation of a stub as is the case on, e.g., | |
| 1466 // x86. Normally, VM_Version_init must be called from init_globals in | |
| 1467 // init.cpp, which is called by the initial java thread *after* arguments | |
| 1468 // have been parsed. VM_Version_init gets called twice on sparc. | |
| 1469 extern void VM_Version_init(); | |
| 1470 VM_Version_init(); | |
| 1471 if (!VM_Version::has_v9()) { | |
| 1472 jio_fprintf(defaultStream::error_stream(), | |
| 1473 "V8 Machine detected, Server requires V9\n"); | |
| 1474 status = false; | |
| 1475 } | |
| 1476 #endif /* COMPILER2 && SPARC */ | |
| 1477 | |
| 1478 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product | |
| 1479 // builds so the cost of stack banging can be measured. | |
| 1480 #if (defined(PRODUCT) && defined(SOLARIS)) | |
| 1481 if (!UseBoundThreads && !UseStackBanging) { | |
| 1482 jio_fprintf(defaultStream::error_stream(), | |
| 1483 "-UseStackBanging conflicts with -UseBoundThreads\n"); | |
| 1484 | |
| 1485 status = false; | |
| 1486 } | |
| 1487 #endif | |
| 1488 | |
| 1489 if (TLABRefillWasteFraction == 0) { | |
| 1490 jio_fprintf(defaultStream::error_stream(), | |
| 1491 "TLABRefillWasteFraction should be a denominator, " | |
| 1492 "not " SIZE_FORMAT "\n", | |
| 1493 TLABRefillWasteFraction); | |
| 1494 status = false; | |
| 1495 } | |
| 1496 | |
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1497 status = status && verify_percentage(MaxLiveObjectEvacuationRatio, |
| 0 | 1498 "MaxLiveObjectEvacuationRatio"); |
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1499 status = status && verify_percentage(AdaptiveSizePolicyWeight, |
| 0 | 1500 "AdaptiveSizePolicyWeight"); |
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1501 status = status && verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); |
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1502 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); |
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1503 status = status && verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); |
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1504 status = status && verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); |
| 0 | 1505 |
| 1506 if (MinHeapFreeRatio > MaxHeapFreeRatio) { | |
| 1507 jio_fprintf(defaultStream::error_stream(), | |
| 1508 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " | |
| 1509 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", | |
| 1510 MinHeapFreeRatio, MaxHeapFreeRatio); | |
| 1511 status = false; | |
| 1512 } | |
| 1513 // Keeping the heap 100% free is hard ;-) so limit it to 99%. | |
| 1514 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); | |
| 1515 | |
| 1516 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { | |
| 1517 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. | |
| 1518 } | |
| 1519 | |
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1520 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
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1521 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); |
| 0 | 1522 if (GCTimeLimit == 100) { |
| 1523 // Turn off gc-overhead-limit-exceeded checks | |
| 1524 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); | |
| 1525 } | |
| 1526 | |
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1527 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
| 0 | 1528 |
| 1529 // Check user specified sharing option conflict with Parallel GC | |
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1530 bool cannot_share = (UseConcMarkSweepGC || UseG1GC || UseParNewGC || |
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1531 UseParallelGC || UseParallelOldGC || |
| 0 | 1532 SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages)); |
| 1533 | |
| 1534 if (cannot_share) { | |
| 1535 // Either force sharing on by forcing the other options off, or | |
| 1536 // force sharing off. | |
| 1537 if (DumpSharedSpaces || ForceSharedSpaces) { | |
| 1538 set_serial_gc_flags(); | |
| 1539 FLAG_SET_DEFAULT(SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages), false); | |
| 1540 } else { | |
| 1541 no_shared_spaces(); | |
| 1542 } | |
| 1543 } | |
| 1544 | |
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1545 status = status && check_gc_consistency(); |
| 0 | 1546 |
| 1547 if (_has_alloc_profile) { | |
| 1548 if (UseParallelGC || UseParallelOldGC) { | |
| 1549 jio_fprintf(defaultStream::error_stream(), | |
| 1550 "error: invalid argument combination.\n" | |
| 1551 "Allocation profiling (-Xaprof) cannot be used together with " | |
| 1552 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); | |
| 1553 status = false; | |
| 1554 } | |
| 1555 if (UseConcMarkSweepGC) { | |
| 1556 jio_fprintf(defaultStream::error_stream(), | |
| 1557 "error: invalid argument combination.\n" | |
| 1558 "Allocation profiling (-Xaprof) cannot be used together with " | |
| 1559 "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); | |
| 1560 status = false; | |
| 1561 } | |
| 1562 } | |
| 1563 | |
| 1564 if (CMSIncrementalMode) { | |
| 1565 if (!UseConcMarkSweepGC) { | |
| 1566 jio_fprintf(defaultStream::error_stream(), | |
| 1567 "error: invalid argument combination.\n" | |
| 1568 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " | |
| 1569 "selected in order\nto use CMSIncrementalMode.\n"); | |
| 1570 status = false; | |
| 1571 } else { | |
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1572 status = status && verify_percentage(CMSIncrementalDutyCycle, |
| 0 | 1573 "CMSIncrementalDutyCycle"); |
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1574 status = status && verify_percentage(CMSIncrementalDutyCycleMin, |
| 0 | 1575 "CMSIncrementalDutyCycleMin"); |
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1576 status = status && verify_percentage(CMSIncrementalSafetyFactor, |
| 0 | 1577 "CMSIncrementalSafetyFactor"); |
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1578 status = status && verify_percentage(CMSIncrementalOffset, |
| 0 | 1579 "CMSIncrementalOffset"); |
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1580 status = status && verify_percentage(CMSExpAvgFactor, |
| 0 | 1581 "CMSExpAvgFactor"); |
| 1582 // If it was not set on the command line, set | |
| 1583 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. | |
| 1584 if (CMSInitiatingOccupancyFraction < 0) { | |
| 1585 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); | |
| 1586 } | |
| 1587 } | |
| 1588 } | |
| 1589 | |
| 1590 // CMS space iteration, which FLSVerifyAllHeapreferences entails, | |
| 1591 // insists that we hold the requisite locks so that the iteration is | |
| 1592 // MT-safe. For the verification at start-up and shut-down, we don't | |
| 1593 // yet have a good way of acquiring and releasing these locks, | |
| 1594 // which are not visible at the CollectedHeap level. We want to | |
| 1595 // be able to acquire these locks and then do the iteration rather | |
| 1596 // than just disable the lock verification. This will be fixed under | |
| 1597 // bug 4788986. | |
| 1598 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { | |
| 1599 if (VerifyGCStartAt == 0) { | |
| 1600 warning("Heap verification at start-up disabled " | |
| 1601 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
| 1602 VerifyGCStartAt = 1; // Disable verification at start-up | |
| 1603 } | |
| 1604 if (VerifyBeforeExit) { | |
| 1605 warning("Heap verification at shutdown disabled " | |
| 1606 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
| 1607 VerifyBeforeExit = false; // Disable verification at shutdown | |
| 1608 } | |
| 1609 } | |
| 1610 | |
| 1611 // Note: only executed in non-PRODUCT mode | |
| 1612 if (!UseAsyncConcMarkSweepGC && | |
| 1613 (ExplicitGCInvokesConcurrent || | |
| 1614 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { | |
| 1615 jio_fprintf(defaultStream::error_stream(), | |
| 1616 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" | |
| 1617 " with -UseAsyncConcMarkSweepGC"); | |
| 1618 status = false; | |
| 1619 } | |
| 1620 | |
| 1621 return status; | |
| 1622 } | |
| 1623 | |
| 1624 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, | |
| 1625 const char* option_type) { | |
| 1626 if (ignore) return false; | |
| 1627 | |
| 1628 const char* spacer = " "; | |
| 1629 if (option_type == NULL) { | |
| 1630 option_type = ++spacer; // Set both to the empty string. | |
| 1631 } | |
| 1632 | |
| 1633 if (os::obsolete_option(option)) { | |
| 1634 jio_fprintf(defaultStream::error_stream(), | |
| 1635 "Obsolete %s%soption: %s\n", option_type, spacer, | |
| 1636 option->optionString); | |
| 1637 return false; | |
| 1638 } else { | |
| 1639 jio_fprintf(defaultStream::error_stream(), | |
| 1640 "Unrecognized %s%soption: %s\n", option_type, spacer, | |
| 1641 option->optionString); | |
| 1642 return true; | |
| 1643 } | |
| 1644 } | |
| 1645 | |
| 1646 static const char* user_assertion_options[] = { | |
| 1647 "-da", "-ea", "-disableassertions", "-enableassertions", 0 | |
| 1648 }; | |
| 1649 | |
| 1650 static const char* system_assertion_options[] = { | |
| 1651 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 | |
| 1652 }; | |
| 1653 | |
| 1654 // Return true if any of the strings in null-terminated array 'names' matches. | |
| 1655 // If tail_allowed is true, then the tail must begin with a colon; otherwise, | |
| 1656 // the option must match exactly. | |
| 1657 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, | |
| 1658 bool tail_allowed) { | |
| 1659 for (/* empty */; *names != NULL; ++names) { | |
| 1660 if (match_option(option, *names, tail)) { | |
| 1661 if (**tail == '\0' || tail_allowed && **tail == ':') { | |
| 1662 return true; | |
| 1663 } | |
| 1664 } | |
| 1665 } | |
| 1666 return false; | |
| 1667 } | |
| 1668 | |
| 1669 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, | |
| 1670 jlong* long_arg, | |
| 1671 jlong min_size) { | |
| 1672 if (!atomll(s, long_arg)) return arg_unreadable; | |
| 1673 return check_memory_size(*long_arg, min_size); | |
| 1674 } | |
| 1675 | |
| 1676 // Parse JavaVMInitArgs structure | |
| 1677 | |
| 1678 jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { | |
| 1679 // For components of the system classpath. | |
| 1680 SysClassPath scp(Arguments::get_sysclasspath()); | |
| 1681 bool scp_assembly_required = false; | |
| 1682 | |
| 1683 // Save default settings for some mode flags | |
| 1684 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; | |
| 1685 Arguments::_UseOnStackReplacement = UseOnStackReplacement; | |
| 1686 Arguments::_ClipInlining = ClipInlining; | |
| 1687 Arguments::_BackgroundCompilation = BackgroundCompilation; | |
| 1688 Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; | |
| 1689 | |
| 1690 // Parse JAVA_TOOL_OPTIONS environment variable (if present) | |
| 1691 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); | |
| 1692 if (result != JNI_OK) { | |
| 1693 return result; | |
| 1694 } | |
| 1695 | |
| 1696 // Parse JavaVMInitArgs structure passed in | |
| 1697 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); | |
| 1698 if (result != JNI_OK) { | |
| 1699 return result; | |
| 1700 } | |
| 1701 | |
| 1702 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) | |
| 1703 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); | |
| 1704 if (result != JNI_OK) { | |
| 1705 return result; | |
| 1706 } | |
| 1707 | |
| 1708 // Do final processing now that all arguments have been parsed | |
| 1709 result = finalize_vm_init_args(&scp, scp_assembly_required); | |
| 1710 if (result != JNI_OK) { | |
| 1711 return result; | |
| 1712 } | |
| 1713 | |
| 1714 return JNI_OK; | |
| 1715 } | |
| 1716 | |
| 1717 | |
| 1718 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, | |
| 1719 SysClassPath* scp_p, | |
| 1720 bool* scp_assembly_required_p, | |
| 1721 FlagValueOrigin origin) { | |
| 1722 // Remaining part of option string | |
| 1723 const char* tail; | |
| 1724 | |
| 1725 // iterate over arguments | |
| 1726 for (int index = 0; index < args->nOptions; index++) { | |
| 1727 bool is_absolute_path = false; // for -agentpath vs -agentlib | |
| 1728 | |
| 1729 const JavaVMOption* option = args->options + index; | |
| 1730 | |
| 1731 if (!match_option(option, "-Djava.class.path", &tail) && | |
| 1732 !match_option(option, "-Dsun.java.command", &tail) && | |
| 1733 !match_option(option, "-Dsun.java.launcher", &tail)) { | |
| 1734 | |
| 1735 // add all jvm options to the jvm_args string. This string | |
| 1736 // is used later to set the java.vm.args PerfData string constant. | |
| 1737 // the -Djava.class.path and the -Dsun.java.command options are | |
| 1738 // omitted from jvm_args string as each have their own PerfData | |
| 1739 // string constant object. | |
| 1740 build_jvm_args(option->optionString); | |
| 1741 } | |
| 1742 | |
| 1743 // -verbose:[class/gc/jni] | |
| 1744 if (match_option(option, "-verbose", &tail)) { | |
| 1745 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { | |
| 1746 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); | |
| 1747 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
| 1748 } else if (!strcmp(tail, ":gc")) { | |
| 1749 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
| 1750 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
| 1751 } else if (!strcmp(tail, ":jni")) { | |
| 1752 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); | |
| 1753 } | |
| 1754 // -da / -ea / -disableassertions / -enableassertions | |
| 1755 // These accept an optional class/package name separated by a colon, e.g., | |
| 1756 // -da:java.lang.Thread. | |
| 1757 } else if (match_option(option, user_assertion_options, &tail, true)) { | |
| 1758 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
| 1759 if (*tail == '\0') { | |
| 1760 JavaAssertions::setUserClassDefault(enable); | |
| 1761 } else { | |
| 1762 assert(*tail == ':', "bogus match by match_option()"); | |
| 1763 JavaAssertions::addOption(tail + 1, enable); | |
| 1764 } | |
| 1765 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions | |
| 1766 } else if (match_option(option, system_assertion_options, &tail, false)) { | |
| 1767 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
| 1768 JavaAssertions::setSystemClassDefault(enable); | |
| 1769 // -bootclasspath: | |
| 1770 } else if (match_option(option, "-Xbootclasspath:", &tail)) { | |
| 1771 scp_p->reset_path(tail); | |
| 1772 *scp_assembly_required_p = true; | |
| 1773 // -bootclasspath/a: | |
| 1774 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { | |
| 1775 scp_p->add_suffix(tail); | |
| 1776 *scp_assembly_required_p = true; | |
| 1777 // -bootclasspath/p: | |
| 1778 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { | |
| 1779 scp_p->add_prefix(tail); | |
| 1780 *scp_assembly_required_p = true; | |
| 1781 // -Xrun | |
| 1782 } else if (match_option(option, "-Xrun", &tail)) { | |
| 1783 if(tail != NULL) { | |
| 1784 const char* pos = strchr(tail, ':'); | |
| 1785 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
| 1786 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
| 1787 name[len] = '\0'; | |
| 1788 | |
| 1789 char *options = NULL; | |
| 1790 if(pos != NULL) { | |
| 1791 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. | |
| 1792 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2); | |
| 1793 } | |
| 1794 #ifdef JVMTI_KERNEL | |
| 1795 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
| 1796 warning("profiling and debugging agents are not supported with Kernel VM"); | |
| 1797 } else | |
| 1798 #endif // JVMTI_KERNEL | |
| 1799 add_init_library(name, options); | |
| 1800 } | |
| 1801 // -agentlib and -agentpath | |
| 1802 } else if (match_option(option, "-agentlib:", &tail) || | |
| 1803 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { | |
| 1804 if(tail != NULL) { | |
| 1805 const char* pos = strchr(tail, '='); | |
| 1806 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
| 1807 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
| 1808 name[len] = '\0'; | |
| 1809 | |
| 1810 char *options = NULL; | |
| 1811 if(pos != NULL) { | |
| 1812 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); | |
| 1813 } | |
| 1814 #ifdef JVMTI_KERNEL | |
| 1815 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
| 1816 warning("profiling and debugging agents are not supported with Kernel VM"); | |
| 1817 } else | |
| 1818 #endif // JVMTI_KERNEL | |
| 1819 add_init_agent(name, options, is_absolute_path); | |
| 1820 | |
| 1821 } | |
| 1822 // -javaagent | |
| 1823 } else if (match_option(option, "-javaagent:", &tail)) { | |
| 1824 if(tail != NULL) { | |
| 1825 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); | |
| 1826 add_init_agent("instrument", options, false); | |
| 1827 } | |
| 1828 // -Xnoclassgc | |
| 1829 } else if (match_option(option, "-Xnoclassgc", &tail)) { | |
| 1830 FLAG_SET_CMDLINE(bool, ClassUnloading, false); | |
| 1831 // -Xincgc: i-CMS | |
| 1832 } else if (match_option(option, "-Xincgc", &tail)) { | |
| 1833 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
| 1834 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); | |
| 1835 // -Xnoincgc: no i-CMS | |
| 1836 } else if (match_option(option, "-Xnoincgc", &tail)) { | |
| 1837 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
| 1838 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); | |
| 1839 // -Xconcgc | |
| 1840 } else if (match_option(option, "-Xconcgc", &tail)) { | |
| 1841 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
| 1842 // -Xnoconcgc | |
| 1843 } else if (match_option(option, "-Xnoconcgc", &tail)) { | |
| 1844 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
| 1845 // -Xbatch | |
| 1846 } else if (match_option(option, "-Xbatch", &tail)) { | |
| 1847 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
| 1848 // -Xmn for compatibility with other JVM vendors | |
| 1849 } else if (match_option(option, "-Xmn", &tail)) { | |
| 1850 jlong long_initial_eden_size = 0; | |
| 1851 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); | |
| 1852 if (errcode != arg_in_range) { | |
| 1853 jio_fprintf(defaultStream::error_stream(), | |
| 1854 "Invalid initial eden size: %s\n", option->optionString); | |
| 1855 describe_range_error(errcode); | |
| 1856 return JNI_EINVAL; | |
| 1857 } | |
| 1858 FLAG_SET_CMDLINE(uintx, MaxNewSize, (size_t) long_initial_eden_size); | |
| 1859 FLAG_SET_CMDLINE(uintx, NewSize, (size_t) long_initial_eden_size); | |
| 1860 // -Xms | |
| 1861 } else if (match_option(option, "-Xms", &tail)) { | |
| 1862 jlong long_initial_heap_size = 0; | |
| 1863 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); | |
| 1864 if (errcode != arg_in_range) { | |
| 1865 jio_fprintf(defaultStream::error_stream(), | |
| 1866 "Invalid initial heap size: %s\n", option->optionString); | |
| 1867 describe_range_error(errcode); | |
| 1868 return JNI_EINVAL; | |
| 1869 } | |
| 1870 set_initial_heap_size((size_t) long_initial_heap_size); | |
| 1871 // Currently the minimum size and the initial heap sizes are the same. | |
| 1872 set_min_heap_size(initial_heap_size()); | |
| 1873 // -Xmx | |
| 1874 } else if (match_option(option, "-Xmx", &tail)) { | |
| 1875 jlong long_max_heap_size = 0; | |
| 1876 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); | |
| 1877 if (errcode != arg_in_range) { | |
| 1878 jio_fprintf(defaultStream::error_stream(), | |
| 1879 "Invalid maximum heap size: %s\n", option->optionString); | |
| 1880 describe_range_error(errcode); | |
| 1881 return JNI_EINVAL; | |
| 1882 } | |
| 1883 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (size_t) long_max_heap_size); | |
| 1884 // Xmaxf | |
| 1885 } else if (match_option(option, "-Xmaxf", &tail)) { | |
| 1886 int maxf = (int)(atof(tail) * 100); | |
| 1887 if (maxf < 0 || maxf > 100) { | |
| 1888 jio_fprintf(defaultStream::error_stream(), | |
| 1889 "Bad max heap free percentage size: %s\n", | |
| 1890 option->optionString); | |
| 1891 return JNI_EINVAL; | |
| 1892 } else { | |
| 1893 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); | |
| 1894 } | |
| 1895 // Xminf | |
| 1896 } else if (match_option(option, "-Xminf", &tail)) { | |
| 1897 int minf = (int)(atof(tail) * 100); | |
| 1898 if (minf < 0 || minf > 100) { | |
| 1899 jio_fprintf(defaultStream::error_stream(), | |
| 1900 "Bad min heap free percentage size: %s\n", | |
| 1901 option->optionString); | |
| 1902 return JNI_EINVAL; | |
| 1903 } else { | |
| 1904 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); | |
| 1905 } | |
| 1906 // -Xss | |
| 1907 } else if (match_option(option, "-Xss", &tail)) { | |
| 1908 jlong long_ThreadStackSize = 0; | |
| 1909 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); | |
| 1910 if (errcode != arg_in_range) { | |
| 1911 jio_fprintf(defaultStream::error_stream(), | |
| 1912 "Invalid thread stack size: %s\n", option->optionString); | |
| 1913 describe_range_error(errcode); | |
| 1914 return JNI_EINVAL; | |
| 1915 } | |
| 1916 // Internally track ThreadStackSize in units of 1024 bytes. | |
| 1917 FLAG_SET_CMDLINE(intx, ThreadStackSize, | |
| 1918 round_to((int)long_ThreadStackSize, K) / K); | |
| 1919 // -Xoss | |
| 1920 } else if (match_option(option, "-Xoss", &tail)) { | |
| 1921 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility | |
| 1922 // -Xmaxjitcodesize | |
| 1923 } else if (match_option(option, "-Xmaxjitcodesize", &tail)) { | |
| 1924 jlong long_ReservedCodeCacheSize = 0; | |
| 1925 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, | |
| 1926 InitialCodeCacheSize); | |
| 1927 if (errcode != arg_in_range) { | |
| 1928 jio_fprintf(defaultStream::error_stream(), | |
| 1929 "Invalid maximum code cache size: %s\n", | |
| 1930 option->optionString); | |
| 1931 describe_range_error(errcode); | |
| 1932 return JNI_EINVAL; | |
| 1933 } | |
| 1934 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); | |
| 1935 // -green | |
| 1936 } else if (match_option(option, "-green", &tail)) { | |
| 1937 jio_fprintf(defaultStream::error_stream(), | |
| 1938 "Green threads support not available\n"); | |
| 1939 return JNI_EINVAL; | |
| 1940 // -native | |
| 1941 } else if (match_option(option, "-native", &tail)) { | |
| 1942 // HotSpot always uses native threads, ignore silently for compatibility | |
| 1943 // -Xsqnopause | |
| 1944 } else if (match_option(option, "-Xsqnopause", &tail)) { | |
| 1945 // EVM option, ignore silently for compatibility | |
| 1946 // -Xrs | |
| 1947 } else if (match_option(option, "-Xrs", &tail)) { | |
| 1948 // Classic/EVM option, new functionality | |
| 1949 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); | |
| 1950 } else if (match_option(option, "-Xusealtsigs", &tail)) { | |
| 1951 // change default internal VM signals used - lower case for back compat | |
| 1952 FLAG_SET_CMDLINE(bool, UseAltSigs, true); | |
| 1953 // -Xoptimize | |
| 1954 } else if (match_option(option, "-Xoptimize", &tail)) { | |
| 1955 // EVM option, ignore silently for compatibility | |
| 1956 // -Xprof | |
| 1957 } else if (match_option(option, "-Xprof", &tail)) { | |
| 1958 #ifndef FPROF_KERNEL | |
| 1959 _has_profile = true; | |
| 1960 #else // FPROF_KERNEL | |
| 1961 // do we have to exit? | |
| 1962 warning("Kernel VM does not support flat profiling."); | |
| 1963 #endif // FPROF_KERNEL | |
| 1964 // -Xaprof | |
| 1965 } else if (match_option(option, "-Xaprof", &tail)) { | |
| 1966 _has_alloc_profile = true; | |
| 1967 // -Xconcurrentio | |
| 1968 } else if (match_option(option, "-Xconcurrentio", &tail)) { | |
| 1969 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); | |
| 1970 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
| 1971 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); | |
| 1972 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
| 1973 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation | |
| 1974 | |
| 1975 // -Xinternalversion | |
| 1976 } else if (match_option(option, "-Xinternalversion", &tail)) { | |
| 1977 jio_fprintf(defaultStream::output_stream(), "%s\n", | |
| 1978 VM_Version::internal_vm_info_string()); | |
| 1979 vm_exit(0); | |
| 1980 #ifndef PRODUCT | |
| 1981 // -Xprintflags | |
| 1982 } else if (match_option(option, "-Xprintflags", &tail)) { | |
| 1983 CommandLineFlags::printFlags(); | |
| 1984 vm_exit(0); | |
| 1985 #endif | |
| 1986 // -D | |
| 1987 } else if (match_option(option, "-D", &tail)) { | |
| 1988 if (!add_property(tail)) { | |
| 1989 return JNI_ENOMEM; | |
| 1990 } | |
| 1991 // Out of the box management support | |
| 1992 if (match_option(option, "-Dcom.sun.management", &tail)) { | |
| 1993 FLAG_SET_CMDLINE(bool, ManagementServer, true); | |
| 1994 } | |
| 1995 // -Xint | |
| 1996 } else if (match_option(option, "-Xint", &tail)) { | |
| 1997 set_mode_flags(_int); | |
| 1998 // -Xmixed | |
| 1999 } else if (match_option(option, "-Xmixed", &tail)) { | |
| 2000 set_mode_flags(_mixed); | |
| 2001 // -Xcomp | |
| 2002 } else if (match_option(option, "-Xcomp", &tail)) { | |
| 2003 // for testing the compiler; turn off all flags that inhibit compilation | |
| 2004 set_mode_flags(_comp); | |
| 2005 | |
| 2006 // -Xshare:dump | |
| 2007 } else if (match_option(option, "-Xshare:dump", &tail)) { | |
| 2008 #ifdef TIERED | |
| 2009 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
| 2010 set_mode_flags(_int); // Prevent compilation, which creates objects | |
| 2011 #elif defined(COMPILER2) | |
| 2012 vm_exit_during_initialization( | |
| 2013 "Dumping a shared archive is not supported on the Server JVM.", NULL); | |
| 2014 #elif defined(KERNEL) | |
| 2015 vm_exit_during_initialization( | |
| 2016 "Dumping a shared archive is not supported on the Kernel JVM.", NULL); | |
| 2017 #else | |
| 2018 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
| 2019 set_mode_flags(_int); // Prevent compilation, which creates objects | |
| 2020 #endif | |
| 2021 // -Xshare:on | |
| 2022 } else if (match_option(option, "-Xshare:on", &tail)) { | |
| 2023 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
| 2024 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); | |
| 2025 #ifdef TIERED | |
| 2026 FLAG_SET_CMDLINE(bool, ForceSharedSpaces, true); | |
| 2027 #endif // TIERED | |
| 2028 // -Xshare:auto | |
| 2029 } else if (match_option(option, "-Xshare:auto", &tail)) { | |
| 2030 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
| 2031 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
| 2032 // -Xshare:off | |
| 2033 } else if (match_option(option, "-Xshare:off", &tail)) { | |
| 2034 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); | |
| 2035 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
| 2036 | |
| 2037 // -Xverify | |
| 2038 } else if (match_option(option, "-Xverify", &tail)) { | |
| 2039 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { | |
| 2040 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); | |
| 2041 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
| 2042 } else if (strcmp(tail, ":remote") == 0) { | |
| 2043 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
| 2044 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
| 2045 } else if (strcmp(tail, ":none") == 0) { | |
| 2046 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
| 2047 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); | |
| 2048 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { | |
| 2049 return JNI_EINVAL; | |
| 2050 } | |
| 2051 // -Xdebug | |
| 2052 } else if (match_option(option, "-Xdebug", &tail)) { | |
| 2053 // note this flag has been used, then ignore | |
| 2054 set_xdebug_mode(true); | |
| 2055 // -Xnoagent | |
| 2056 } else if (match_option(option, "-Xnoagent", &tail)) { | |
| 2057 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. | |
| 2058 } else if (match_option(option, "-Xboundthreads", &tail)) { | |
| 2059 // Bind user level threads to kernel threads (Solaris only) | |
| 2060 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); | |
| 2061 } else if (match_option(option, "-Xloggc:", &tail)) { | |
| 2062 // Redirect GC output to the file. -Xloggc:<filename> | |
| 2063 // ostream_init_log(), when called will use this filename | |
| 2064 // to initialize a fileStream. | |
| 2065 _gc_log_filename = strdup(tail); | |
| 2066 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
| 2067 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); | |
| 2068 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
| 2069 | |
| 2070 // JNI hooks | |
| 2071 } else if (match_option(option, "-Xcheck", &tail)) { | |
| 2072 if (!strcmp(tail, ":jni")) { | |
| 2073 CheckJNICalls = true; | |
| 2074 } else if (is_bad_option(option, args->ignoreUnrecognized, | |
| 2075 "check")) { | |
| 2076 return JNI_EINVAL; | |
| 2077 } | |
| 2078 } else if (match_option(option, "vfprintf", &tail)) { | |
| 2079 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); | |
| 2080 } else if (match_option(option, "exit", &tail)) { | |
| 2081 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); | |
| 2082 } else if (match_option(option, "abort", &tail)) { | |
| 2083 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); | |
| 2084 // -XX:+AggressiveHeap | |
| 2085 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { | |
| 2086 | |
| 2087 // This option inspects the machine and attempts to set various | |
| 2088 // parameters to be optimal for long-running, memory allocation | |
| 2089 // intensive jobs. It is intended for machines with large | |
| 2090 // amounts of cpu and memory. | |
| 2091 | |
| 2092 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit | |
| 2093 // VM, but we may not be able to represent the total physical memory | |
| 2094 // available (like having 8gb of memory on a box but using a 32bit VM). | |
| 2095 // Thus, we need to make sure we're using a julong for intermediate | |
| 2096 // calculations. | |
| 2097 julong initHeapSize; | |
| 2098 julong total_memory = os::physical_memory(); | |
| 2099 | |
| 2100 if (total_memory < (julong)256*M) { | |
| 2101 jio_fprintf(defaultStream::error_stream(), | |
| 2102 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); | |
| 2103 vm_exit(1); | |
| 2104 } | |
| 2105 | |
| 2106 // The heap size is half of available memory, or (at most) | |
| 2107 // all of possible memory less 160mb (leaving room for the OS | |
| 2108 // when using ISM). This is the maximum; because adaptive sizing | |
| 2109 // is turned on below, the actual space used may be smaller. | |
| 2110 | |
| 2111 initHeapSize = MIN2(total_memory / (julong)2, | |
| 2112 total_memory - (julong)160*M); | |
| 2113 | |
| 2114 // Make sure that if we have a lot of memory we cap the 32 bit | |
| 2115 // process space. The 64bit VM version of this function is a nop. | |
| 2116 initHeapSize = os::allocatable_physical_memory(initHeapSize); | |
| 2117 | |
| 2118 // The perm gen is separate but contiguous with the | |
| 2119 // object heap (and is reserved with it) so subtract it | |
| 2120 // from the heap size. | |
| 2121 if (initHeapSize > MaxPermSize) { | |
| 2122 initHeapSize = initHeapSize - MaxPermSize; | |
| 2123 } else { | |
| 2124 warning("AggressiveHeap and MaxPermSize values may conflict"); | |
| 2125 } | |
| 2126 | |
| 2127 if (FLAG_IS_DEFAULT(MaxHeapSize)) { | |
| 2128 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); | |
| 2129 set_initial_heap_size(MaxHeapSize); | |
| 2130 // Currently the minimum size and the initial heap sizes are the same. | |
| 2131 set_min_heap_size(initial_heap_size()); | |
| 2132 } | |
| 2133 if (FLAG_IS_DEFAULT(NewSize)) { | |
| 2134 // Make the young generation 3/8ths of the total heap. | |
| 2135 FLAG_SET_CMDLINE(uintx, NewSize, | |
| 2136 ((julong)MaxHeapSize / (julong)8) * (julong)3); | |
| 2137 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); | |
| 2138 } | |
| 2139 | |
| 2140 FLAG_SET_DEFAULT(UseLargePages, true); | |
| 2141 | |
| 2142 // Increase some data structure sizes for efficiency | |
| 2143 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); | |
| 2144 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
| 2145 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); | |
| 2146 | |
| 2147 // See the OldPLABSize comment below, but replace 'after promotion' | |
| 2148 // with 'after copying'. YoungPLABSize is the size of the survivor | |
| 2149 // space per-gc-thread buffers. The default is 4kw. | |
| 2150 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words | |
| 2151 | |
| 2152 // OldPLABSize is the size of the buffers in the old gen that | |
| 2153 // UseParallelGC uses to promote live data that doesn't fit in the | |
| 2154 // survivor spaces. At any given time, there's one for each gc thread. | |
| 2155 // The default size is 1kw. These buffers are rarely used, since the | |
| 2156 // survivor spaces are usually big enough. For specjbb, however, there | |
| 2157 // are occasions when there's lots of live data in the young gen | |
| 2158 // and we end up promoting some of it. We don't have a definite | |
| 2159 // explanation for why bumping OldPLABSize helps, but the theory | |
| 2160 // is that a bigger PLAB results in retaining something like the | |
| 2161 // original allocation order after promotion, which improves mutator | |
| 2162 // locality. A minor effect may be that larger PLABs reduce the | |
| 2163 // number of PLAB allocation events during gc. The value of 8kw | |
| 2164 // was arrived at by experimenting with specjbb. | |
| 2165 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words | |
| 2166 | |
| 2167 // CompilationPolicyChoice=0 causes the server compiler to adopt | |
| 2168 // a more conservative which-method-do-I-compile policy when one | |
| 2169 // of the counters maintained by the interpreter trips. The | |
| 2170 // result is reduced startup time and improved specjbb and | |
| 2171 // alacrity performance. Zero is the default, but we set it | |
| 2172 // explicitly here in case the default changes. | |
| 2173 // See runtime/compilationPolicy.*. | |
| 2174 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); | |
| 2175 | |
| 2176 // Enable parallel GC and adaptive generation sizing | |
| 2177 FLAG_SET_CMDLINE(bool, UseParallelGC, true); | |
|
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changeset
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2178 FLAG_SET_DEFAULT(ParallelGCThreads, |
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changeset
|
2179 Abstract_VM_Version::parallel_worker_threads()); |
| 0 | 2180 |
| 2181 // Encourage steady state memory management | |
| 2182 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); | |
| 2183 | |
| 2184 // This appears to improve mutator locality | |
| 2185 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
| 2186 | |
| 2187 // Get around early Solaris scheduling bug | |
| 2188 // (affinity vs other jobs on system) | |
| 2189 // but disallow DR and offlining (5008695). | |
| 2190 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); | |
| 2191 | |
| 2192 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { | |
| 2193 // The last option must always win. | |
| 2194 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); | |
| 2195 FLAG_SET_CMDLINE(bool, NeverTenure, true); | |
| 2196 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { | |
| 2197 // The last option must always win. | |
| 2198 FLAG_SET_CMDLINE(bool, NeverTenure, false); | |
| 2199 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); | |
| 2200 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || | |
| 2201 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { | |
| 2202 jio_fprintf(defaultStream::error_stream(), | |
| 2203 "Please use CMSClassUnloadingEnabled in place of " | |
| 2204 "CMSPermGenSweepingEnabled in the future\n"); | |
| 2205 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { | |
| 2206 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); | |
| 2207 jio_fprintf(defaultStream::error_stream(), | |
| 2208 "Please use -XX:+UseGCOverheadLimit in place of " | |
| 2209 "-XX:+UseGCTimeLimit in the future\n"); | |
| 2210 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { | |
| 2211 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); | |
| 2212 jio_fprintf(defaultStream::error_stream(), | |
| 2213 "Please use -XX:-UseGCOverheadLimit in place of " | |
| 2214 "-XX:-UseGCTimeLimit in the future\n"); | |
| 2215 // The TLE options are for compatibility with 1.3 and will be | |
| 2216 // removed without notice in a future release. These options | |
| 2217 // are not to be documented. | |
| 2218 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { | |
| 2219 // No longer used. | |
| 2220 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { | |
| 2221 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); | |
| 2222 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { | |
| 2223 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
| 2224 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { | |
| 2225 FLAG_SET_CMDLINE(bool, PrintTLAB, true); | |
| 2226 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { | |
| 2227 FLAG_SET_CMDLINE(bool, PrintTLAB, false); | |
| 2228 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { | |
| 2229 // No longer used. | |
| 2230 } else if (match_option(option, "-XX:TLESize=", &tail)) { | |
| 2231 jlong long_tlab_size = 0; | |
| 2232 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); | |
| 2233 if (errcode != arg_in_range) { | |
| 2234 jio_fprintf(defaultStream::error_stream(), | |
| 2235 "Invalid TLAB size: %s\n", option->optionString); | |
| 2236 describe_range_error(errcode); | |
| 2237 return JNI_EINVAL; | |
| 2238 } | |
| 2239 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); | |
| 2240 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { | |
| 2241 // No longer used. | |
| 2242 } else if (match_option(option, "-XX:+UseTLE", &tail)) { | |
| 2243 FLAG_SET_CMDLINE(bool, UseTLAB, true); | |
| 2244 } else if (match_option(option, "-XX:-UseTLE", &tail)) { | |
| 2245 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
| 2246 SOLARIS_ONLY( | |
| 2247 } else if (match_option(option, "-XX:+UsePermISM", &tail)) { | |
| 2248 warning("-XX:+UsePermISM is obsolete."); | |
| 2249 FLAG_SET_CMDLINE(bool, UseISM, true); | |
| 2250 } else if (match_option(option, "-XX:-UsePermISM", &tail)) { | |
| 2251 FLAG_SET_CMDLINE(bool, UseISM, false); | |
| 2252 ) | |
| 2253 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { | |
| 2254 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); | |
| 2255 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); | |
| 2256 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { | |
| 2257 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); | |
| 2258 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); | |
| 2259 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { | |
| 2260 #ifdef SOLARIS | |
| 2261 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); | |
| 2262 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); | |
| 2263 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); | |
| 2264 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); | |
| 2265 #else // ndef SOLARIS | |
| 2266 jio_fprintf(defaultStream::error_stream(), | |
| 2267 "ExtendedDTraceProbes flag is only applicable on Solaris\n"); | |
| 2268 return JNI_EINVAL; | |
| 2269 #endif // ndef SOLARIS | |
| 2270 } else | |
| 2271 #ifdef ASSERT | |
| 2272 if (match_option(option, "-XX:+FullGCALot", &tail)) { | |
| 2273 FLAG_SET_CMDLINE(bool, FullGCALot, true); | |
| 2274 // disable scavenge before parallel mark-compact | |
| 2275 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
| 2276 } else | |
| 2277 #endif | |
| 2278 if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { | |
| 2279 julong cms_blocks_to_claim = (julong)atol(tail); | |
| 2280 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); | |
| 2281 jio_fprintf(defaultStream::error_stream(), | |
| 2282 "Please use -XX:CMSParPromoteBlocksToClaim in place of " | |
| 2283 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); | |
| 2284 } else | |
| 2285 if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { | |
| 2286 jlong old_plab_size = 0; | |
| 2287 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); | |
| 2288 if (errcode != arg_in_range) { | |
| 2289 jio_fprintf(defaultStream::error_stream(), | |
| 2290 "Invalid old PLAB size: %s\n", option->optionString); | |
| 2291 describe_range_error(errcode); | |
| 2292 return JNI_EINVAL; | |
| 2293 } | |
| 2294 FLAG_SET_CMDLINE(uintx, OldPLABSize, (julong)old_plab_size); | |
| 2295 jio_fprintf(defaultStream::error_stream(), | |
| 2296 "Please use -XX:OldPLABSize in place of " | |
| 2297 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); | |
| 2298 } else | |
| 2299 if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { | |
| 2300 jlong young_plab_size = 0; | |
| 2301 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); | |
| 2302 if (errcode != arg_in_range) { | |
| 2303 jio_fprintf(defaultStream::error_stream(), | |
| 2304 "Invalid young PLAB size: %s\n", option->optionString); | |
| 2305 describe_range_error(errcode); | |
| 2306 return JNI_EINVAL; | |
| 2307 } | |
| 2308 FLAG_SET_CMDLINE(uintx, YoungPLABSize, (julong)young_plab_size); | |
| 2309 jio_fprintf(defaultStream::error_stream(), | |
| 2310 "Please use -XX:YoungPLABSize in place of " | |
| 2311 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); | |
| 2312 } else | |
| 2313 if (match_option(option, "-XX:", &tail)) { // -XX:xxxx | |
| 2314 // Skip -XX:Flags= since that case has already been handled | |
| 2315 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { | |
| 2316 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { | |
| 2317 return JNI_EINVAL; | |
| 2318 } | |
| 2319 } | |
| 2320 // Unknown option | |
| 2321 } else if (is_bad_option(option, args->ignoreUnrecognized)) { | |
| 2322 return JNI_ERR; | |
| 2323 } | |
| 2324 } | |
| 2325 | |
| 2326 return JNI_OK; | |
| 2327 } | |
| 2328 | |
| 2329 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { | |
| 2330 // This must be done after all -D arguments have been processed. | |
| 2331 scp_p->expand_endorsed(); | |
| 2332 | |
| 2333 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { | |
| 2334 // Assemble the bootclasspath elements into the final path. | |
| 2335 Arguments::set_sysclasspath(scp_p->combined_path()); | |
| 2336 } | |
| 2337 | |
| 2338 // This must be done after all arguments have been processed. | |
| 2339 // java_compiler() true means set to "NONE" or empty. | |
| 2340 if (java_compiler() && !xdebug_mode()) { | |
| 2341 // For backwards compatibility, we switch to interpreted mode if | |
| 2342 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was | |
| 2343 // not specified. | |
| 2344 set_mode_flags(_int); | |
| 2345 } | |
| 2346 if (CompileThreshold == 0) { | |
| 2347 set_mode_flags(_int); | |
| 2348 } | |
| 2349 | |
| 2350 #ifdef TIERED | |
| 2351 // If we are using tiered compilation in the tiered vm then c1 will | |
| 2352 // do the profiling and we don't want to waste that time in the | |
| 2353 // interpreter. | |
| 2354 if (TieredCompilation) { | |
| 2355 ProfileInterpreter = false; | |
| 2356 } else { | |
| 2357 // Since we are running vanilla server we must adjust the compile threshold | |
| 2358 // unless the user has already adjusted it because the default threshold assumes | |
| 2359 // we will run tiered. | |
| 2360 | |
| 2361 if (FLAG_IS_DEFAULT(CompileThreshold)) { | |
| 2362 CompileThreshold = Tier2CompileThreshold; | |
| 2363 } | |
| 2364 } | |
| 2365 #endif // TIERED | |
| 2366 | |
| 2367 #ifndef COMPILER2 | |
| 2368 // Don't degrade server performance for footprint | |
| 2369 if (FLAG_IS_DEFAULT(UseLargePages) && | |
| 2370 MaxHeapSize < LargePageHeapSizeThreshold) { | |
| 2371 // No need for large granularity pages w/small heaps. | |
| 2372 // Note that large pages are enabled/disabled for both the | |
| 2373 // Java heap and the code cache. | |
| 2374 FLAG_SET_DEFAULT(UseLargePages, false); | |
| 2375 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); | |
| 2376 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); | |
| 2377 } | |
|
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2378 |
| 0 | 2379 #else |
| 2380 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { | |
| 2381 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); | |
| 2382 } | |
|
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2383 // Temporary disable bulk zeroing reduction with G1. See CR 6627983. |
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2384 if (UseG1GC) { |
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2385 FLAG_SET_DEFAULT(ReduceBulkZeroing, false); |
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2386 } |
| 0 | 2387 #endif |
| 2388 | |
| 2389 if (!check_vm_args_consistency()) { | |
| 2390 return JNI_ERR; | |
| 2391 } | |
| 2392 | |
| 2393 return JNI_OK; | |
| 2394 } | |
| 2395 | |
| 2396 jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
| 2397 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, | |
| 2398 scp_assembly_required_p); | |
| 2399 } | |
| 2400 | |
| 2401 jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
| 2402 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, | |
| 2403 scp_assembly_required_p); | |
| 2404 } | |
| 2405 | |
| 2406 jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
| 2407 const int N_MAX_OPTIONS = 64; | |
| 2408 const int OPTION_BUFFER_SIZE = 1024; | |
| 2409 char buffer[OPTION_BUFFER_SIZE]; | |
| 2410 | |
| 2411 // The variable will be ignored if it exceeds the length of the buffer. | |
| 2412 // Don't check this variable if user has special privileges | |
| 2413 // (e.g. unix su command). | |
| 2414 if (os::getenv(name, buffer, sizeof(buffer)) && | |
| 2415 !os::have_special_privileges()) { | |
| 2416 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array | |
| 2417 jio_fprintf(defaultStream::error_stream(), | |
| 2418 "Picked up %s: %s\n", name, buffer); | |
| 2419 char* rd = buffer; // pointer to the input string (rd) | |
| 2420 int i; | |
| 2421 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string | |
| 2422 while (isspace(*rd)) rd++; // skip whitespace | |
| 2423 if (*rd == 0) break; // we re done when the input string is read completely | |
| 2424 | |
| 2425 // The output, option string, overwrites the input string. | |
| 2426 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to | |
| 2427 // input string (rd). | |
| 2428 char* wrt = rd; | |
| 2429 | |
| 2430 options[i++].optionString = wrt; // Fill in option | |
| 2431 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL | |
| 2432 if (*rd == '\'' || *rd == '"') { // handle a quoted string | |
| 2433 int quote = *rd; // matching quote to look for | |
| 2434 rd++; // don't copy open quote | |
| 2435 while (*rd != quote) { // include everything (even spaces) up until quote | |
| 2436 if (*rd == 0) { // string termination means unmatched string | |
| 2437 jio_fprintf(defaultStream::error_stream(), | |
| 2438 "Unmatched quote in %s\n", name); | |
| 2439 return JNI_ERR; | |
| 2440 } | |
| 2441 *wrt++ = *rd++; // copy to option string | |
| 2442 } | |
| 2443 rd++; // don't copy close quote | |
| 2444 } else { | |
| 2445 *wrt++ = *rd++; // copy to option string | |
| 2446 } | |
| 2447 } | |
| 2448 // Need to check if we're done before writing a NULL, | |
| 2449 // because the write could be to the byte that rd is pointing to. | |
| 2450 if (*rd++ == 0) { | |
| 2451 *wrt = 0; | |
| 2452 break; | |
| 2453 } | |
| 2454 *wrt = 0; // Zero terminate option | |
| 2455 } | |
| 2456 // Construct JavaVMInitArgs structure and parse as if it was part of the command line | |
| 2457 JavaVMInitArgs vm_args; | |
| 2458 vm_args.version = JNI_VERSION_1_2; | |
| 2459 vm_args.options = options; | |
| 2460 vm_args.nOptions = i; | |
| 2461 vm_args.ignoreUnrecognized = false; | |
| 2462 | |
| 2463 if (PrintVMOptions) { | |
| 2464 const char* tail; | |
| 2465 for (int i = 0; i < vm_args.nOptions; i++) { | |
| 2466 const JavaVMOption *option = vm_args.options + i; | |
| 2467 if (match_option(option, "-XX:", &tail)) { | |
| 2468 logOption(tail); | |
| 2469 } | |
| 2470 } | |
| 2471 } | |
| 2472 | |
| 2473 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); | |
| 2474 } | |
| 2475 return JNI_OK; | |
| 2476 } | |
| 2477 | |
| 2478 // Parse entry point called from JNI_CreateJavaVM | |
| 2479 | |
| 2480 jint Arguments::parse(const JavaVMInitArgs* args) { | |
| 2481 | |
| 2482 // Sharing support | |
| 2483 // Construct the path to the archive | |
| 2484 char jvm_path[JVM_MAXPATHLEN]; | |
| 2485 os::jvm_path(jvm_path, sizeof(jvm_path)); | |
| 2486 #ifdef TIERED | |
| 2487 if (strstr(jvm_path, "client") != NULL) { | |
| 2488 force_client_mode = true; | |
| 2489 } | |
| 2490 #endif // TIERED | |
| 2491 char *end = strrchr(jvm_path, *os::file_separator()); | |
| 2492 if (end != NULL) *end = '\0'; | |
| 2493 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + | |
| 2494 strlen(os::file_separator()) + 20); | |
| 2495 if (shared_archive_path == NULL) return JNI_ENOMEM; | |
| 2496 strcpy(shared_archive_path, jvm_path); | |
| 2497 strcat(shared_archive_path, os::file_separator()); | |
| 2498 strcat(shared_archive_path, "classes"); | |
| 2499 DEBUG_ONLY(strcat(shared_archive_path, "_g");) | |
| 2500 strcat(shared_archive_path, ".jsa"); | |
| 2501 SharedArchivePath = shared_archive_path; | |
| 2502 | |
| 2503 // Remaining part of option string | |
| 2504 const char* tail; | |
| 2505 | |
| 2506 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. | |
| 2507 bool settings_file_specified = false; | |
| 2508 int index; | |
| 2509 for (index = 0; index < args->nOptions; index++) { | |
| 2510 const JavaVMOption *option = args->options + index; | |
| 2511 if (match_option(option, "-XX:Flags=", &tail)) { | |
| 2512 if (!process_settings_file(tail, true, args->ignoreUnrecognized)) { | |
| 2513 return JNI_EINVAL; | |
| 2514 } | |
| 2515 settings_file_specified = true; | |
| 2516 } | |
| 2517 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { | |
| 2518 PrintVMOptions = true; | |
| 2519 } | |
|
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2520 if (match_option(option, "-XX:-PrintVMOptions", &tail)) { |
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2521 PrintVMOptions = false; |
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2522 } |
| 0 | 2523 } |
| 2524 | |
| 2525 // Parse default .hotspotrc settings file | |
| 2526 if (!settings_file_specified) { | |
| 2527 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { | |
| 2528 return JNI_EINVAL; | |
| 2529 } | |
| 2530 } | |
| 2531 | |
| 2532 if (PrintVMOptions) { | |
| 2533 for (index = 0; index < args->nOptions; index++) { | |
| 2534 const JavaVMOption *option = args->options + index; | |
| 2535 if (match_option(option, "-XX:", &tail)) { | |
| 2536 logOption(tail); | |
| 2537 } | |
| 2538 } | |
| 2539 } | |
| 2540 | |
|
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2541 |
| 0 | 2542 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS |
| 2543 jint result = parse_vm_init_args(args); | |
| 2544 if (result != JNI_OK) { | |
| 2545 return result; | |
| 2546 } | |
| 2547 | |
|
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2548 // These are hacks until G1 is fully supported and tested |
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2549 // but lets you force -XX:+UseG1GC in PRT and get it where it (mostly) works |
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2550 if (UseG1GC) { |
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2551 if (UseConcMarkSweepGC || UseParNewGC || UseParallelGC || UseParallelOldGC || UseSerialGC) { |
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2552 #ifndef PRODUCT |
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2553 tty->print_cr("-XX:+UseG1GC is incompatible with other collectors, using UseG1GC"); |
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2554 #endif // PRODUCT |
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2555 UseConcMarkSweepGC = false; |
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2556 UseParNewGC = false; |
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2557 UseParallelGC = false; |
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2558 UseParallelOldGC = false; |
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2559 UseSerialGC = false; |
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2560 } |
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2561 no_shared_spaces(); |
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2562 } |
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2563 |
| 0 | 2564 #ifndef PRODUCT |
| 2565 if (TraceBytecodesAt != 0) { | |
| 2566 TraceBytecodes = true; | |
| 2567 } | |
| 2568 if (CountCompiledCalls) { | |
| 2569 if (UseCounterDecay) { | |
| 2570 warning("UseCounterDecay disabled because CountCalls is set"); | |
| 2571 UseCounterDecay = false; | |
| 2572 } | |
| 2573 } | |
| 2574 #endif // PRODUCT | |
| 2575 | |
| 2576 if (PrintGCDetails) { | |
| 2577 // Turn on -verbose:gc options as well | |
| 2578 PrintGC = true; | |
| 2579 if (FLAG_IS_DEFAULT(TraceClassUnloading)) { | |
| 2580 TraceClassUnloading = true; | |
| 2581 } | |
| 2582 } | |
| 2583 | |
| 2584 #ifdef SERIALGC | |
| 2585 set_serial_gc_flags(); | |
| 2586 #endif // SERIALGC | |
| 2587 #ifdef KERNEL | |
| 2588 no_shared_spaces(); | |
| 2589 #endif // KERNEL | |
| 2590 | |
| 2591 // Set flags based on ergonomics. | |
| 2592 set_ergonomics_flags(); | |
| 2593 | |
|
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2594 // Check the GC selections again. |
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2595 if (!check_gc_consistency()) { |
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2596 return JNI_EINVAL; |
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2597 } |
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2598 |
|
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2599 if (UseParallelGC || UseParallelOldGC) { |
|
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2600 // Set some flags for ParallelGC if needed. |
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2601 set_parallel_gc_flags(); |
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2602 } else if (UseConcMarkSweepGC) { |
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2603 // Set some flags for CMS |
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2604 set_cms_and_parnew_gc_flags(); |
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2605 } else if (UseParNewGC) { |
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2606 // Set some flags for ParNew |
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2607 set_parnew_gc_flags(); |
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2608 } |
|
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2609 // Temporary; make the "if" an "else-if" before |
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2610 // we integrate G1. XXX |
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2611 if (UseG1GC) { |
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2612 // Set some flags for garbage-first, if needed. |
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2613 set_g1_gc_flags(); |
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2614 } |
|
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2615 |
| 0 | 2616 #ifdef SERIALGC |
| 2617 assert(verify_serial_gc_flags(), "SerialGC unset"); | |
| 2618 #endif // SERIALGC | |
| 2619 | |
| 2620 // Set bytecode rewriting flags | |
| 2621 set_bytecode_flags(); | |
| 2622 | |
| 2623 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. | |
| 2624 set_aggressive_opts_flags(); | |
| 2625 | |
| 2626 #ifdef CC_INTERP | |
| 2627 // Biased locking is not implemented with c++ interpreter | |
| 2628 FLAG_SET_DEFAULT(UseBiasedLocking, false); | |
| 2629 #endif /* CC_INTERP */ | |
| 2630 | |
| 2631 if (PrintCommandLineFlags) { | |
| 2632 CommandLineFlags::printSetFlags(); | |
| 2633 } | |
| 2634 | |
|
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2635 #ifdef ASSERT |
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2636 if (PrintFlagsFinal) { |
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2637 CommandLineFlags::printFlags(); |
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2638 } |
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2639 #endif |
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2640 |
| 0 | 2641 return JNI_OK; |
| 2642 } | |
| 2643 | |
| 2644 int Arguments::PropertyList_count(SystemProperty* pl) { | |
| 2645 int count = 0; | |
| 2646 while(pl != NULL) { | |
| 2647 count++; | |
| 2648 pl = pl->next(); | |
| 2649 } | |
| 2650 return count; | |
| 2651 } | |
| 2652 | |
| 2653 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { | |
| 2654 assert(key != NULL, "just checking"); | |
| 2655 SystemProperty* prop; | |
| 2656 for (prop = pl; prop != NULL; prop = prop->next()) { | |
| 2657 if (strcmp(key, prop->key()) == 0) return prop->value(); | |
| 2658 } | |
| 2659 return NULL; | |
| 2660 } | |
| 2661 | |
| 2662 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { | |
| 2663 int count = 0; | |
| 2664 const char* ret_val = NULL; | |
| 2665 | |
| 2666 while(pl != NULL) { | |
| 2667 if(count >= index) { | |
| 2668 ret_val = pl->key(); | |
| 2669 break; | |
| 2670 } | |
| 2671 count++; | |
| 2672 pl = pl->next(); | |
| 2673 } | |
| 2674 | |
| 2675 return ret_val; | |
| 2676 } | |
| 2677 | |
| 2678 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { | |
| 2679 int count = 0; | |
| 2680 char* ret_val = NULL; | |
| 2681 | |
| 2682 while(pl != NULL) { | |
| 2683 if(count >= index) { | |
| 2684 ret_val = pl->value(); | |
| 2685 break; | |
| 2686 } | |
| 2687 count++; | |
| 2688 pl = pl->next(); | |
| 2689 } | |
| 2690 | |
| 2691 return ret_val; | |
| 2692 } | |
| 2693 | |
| 2694 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { | |
| 2695 SystemProperty* p = *plist; | |
| 2696 if (p == NULL) { | |
| 2697 *plist = new_p; | |
| 2698 } else { | |
| 2699 while (p->next() != NULL) { | |
| 2700 p = p->next(); | |
| 2701 } | |
| 2702 p->set_next(new_p); | |
| 2703 } | |
| 2704 } | |
| 2705 | |
| 2706 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { | |
| 2707 if (plist == NULL) | |
| 2708 return; | |
| 2709 | |
| 2710 SystemProperty* new_p = new SystemProperty(k, v, true); | |
| 2711 PropertyList_add(plist, new_p); | |
| 2712 } | |
| 2713 | |
| 2714 // This add maintains unique property key in the list. | |
| 2715 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v) { | |
| 2716 if (plist == NULL) | |
| 2717 return; | |
| 2718 | |
| 2719 // If property key exist then update with new value. | |
| 2720 SystemProperty* prop; | |
| 2721 for (prop = *plist; prop != NULL; prop = prop->next()) { | |
| 2722 if (strcmp(k, prop->key()) == 0) { | |
| 2723 prop->set_value(v); | |
| 2724 return; | |
| 2725 } | |
| 2726 } | |
| 2727 | |
| 2728 PropertyList_add(plist, k, v); | |
| 2729 } | |
| 2730 | |
| 2731 #ifdef KERNEL | |
| 2732 char *Arguments::get_kernel_properties() { | |
| 2733 // Find properties starting with kernel and append them to string | |
| 2734 // We need to find out how long they are first because the URL's that they | |
| 2735 // might point to could get long. | |
| 2736 int length = 0; | |
| 2737 SystemProperty* prop; | |
| 2738 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
| 2739 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
| 2740 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" | |
| 2741 } | |
| 2742 } | |
| 2743 // Add one for null terminator. | |
| 2744 char *props = AllocateHeap(length + 1, "get_kernel_properties"); | |
| 2745 if (length != 0) { | |
| 2746 int pos = 0; | |
| 2747 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
| 2748 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
| 2749 jio_snprintf(&props[pos], length-pos, | |
| 2750 "-D%s=%s ", prop->key(), prop->value()); | |
| 2751 pos = strlen(props); | |
| 2752 } | |
| 2753 } | |
| 2754 } | |
| 2755 // null terminate props in case of null | |
| 2756 props[length] = '\0'; | |
| 2757 return props; | |
| 2758 } | |
| 2759 #endif // KERNEL | |
| 2760 | |
| 2761 // Copies src into buf, replacing "%%" with "%" and "%p" with pid | |
| 2762 // Returns true if all of the source pointed by src has been copied over to | |
| 2763 // the destination buffer pointed by buf. Otherwise, returns false. | |
| 2764 // Notes: | |
| 2765 // 1. If the length (buflen) of the destination buffer excluding the | |
| 2766 // NULL terminator character is not long enough for holding the expanded | |
| 2767 // pid characters, it also returns false instead of returning the partially | |
| 2768 // expanded one. | |
| 2769 // 2. The passed in "buflen" should be large enough to hold the null terminator. | |
| 2770 bool Arguments::copy_expand_pid(const char* src, size_t srclen, | |
| 2771 char* buf, size_t buflen) { | |
| 2772 const char* p = src; | |
| 2773 char* b = buf; | |
| 2774 const char* src_end = &src[srclen]; | |
| 2775 char* buf_end = &buf[buflen - 1]; | |
| 2776 | |
| 2777 while (p < src_end && b < buf_end) { | |
| 2778 if (*p == '%') { | |
| 2779 switch (*(++p)) { | |
| 2780 case '%': // "%%" ==> "%" | |
| 2781 *b++ = *p++; | |
| 2782 break; | |
| 2783 case 'p': { // "%p" ==> current process id | |
| 2784 // buf_end points to the character before the last character so | |
| 2785 // that we could write '\0' to the end of the buffer. | |
| 2786 size_t buf_sz = buf_end - b + 1; | |
| 2787 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); | |
| 2788 | |
| 2789 // if jio_snprintf fails or the buffer is not long enough to hold | |
| 2790 // the expanded pid, returns false. | |
| 2791 if (ret < 0 || ret >= (int)buf_sz) { | |
| 2792 return false; | |
| 2793 } else { | |
| 2794 b += ret; | |
| 2795 assert(*b == '\0', "fail in copy_expand_pid"); | |
| 2796 if (p == src_end && b == buf_end + 1) { | |
| 2797 // reach the end of the buffer. | |
| 2798 return true; | |
| 2799 } | |
| 2800 } | |
| 2801 p++; | |
| 2802 break; | |
| 2803 } | |
| 2804 default : | |
| 2805 *b++ = '%'; | |
| 2806 } | |
| 2807 } else { | |
| 2808 *b++ = *p++; | |
| 2809 } | |
| 2810 } | |
| 2811 *b = '\0'; | |
| 2812 return (p == src_end); // return false if not all of the source was copied | |
| 2813 } |