Print this page
| Split |
Close |
| Expand all |
| Collapse all |
--- old/src/share/vm/runtime/arguments.cpp
+++ new/src/share/vm/runtime/arguments.cpp
1 1 /*
2 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 20 * or visit www.oracle.com if you need additional information or have any
21 21 * questions.
22 22 *
23 23 */
24 24
25 25 #include "precompiled.hpp"
26 26 #include "classfile/javaAssertions.hpp"
27 27 #include "compiler/compilerOracle.hpp"
28 28 #include "memory/allocation.inline.hpp"
29 29 #include "memory/cardTableRS.hpp"
30 30 #include "memory/referenceProcessor.hpp"
31 31 #include "memory/universe.inline.hpp"
32 32 #include "oops/oop.inline.hpp"
33 33 #include "prims/jvmtiExport.hpp"
34 34 #include "runtime/arguments.hpp"
35 35 #include "runtime/globals_extension.hpp"
36 36 #include "runtime/java.hpp"
37 37 #include "services/management.hpp"
38 38 #include "utilities/defaultStream.hpp"
39 39 #include "utilities/taskqueue.hpp"
40 40 #ifdef TARGET_ARCH_x86
41 41 # include "vm_version_x86.hpp"
42 42 #endif
43 43 #ifdef TARGET_ARCH_sparc
44 44 # include "vm_version_sparc.hpp"
45 45 #endif
46 46 #ifdef TARGET_ARCH_zero
47 47 # include "vm_version_zero.hpp"
48 48 #endif
49 49 #ifdef TARGET_OS_FAMILY_linux
50 50 # include "os_linux.inline.hpp"
51 51 #endif
52 52 #ifdef TARGET_OS_FAMILY_solaris
53 53 # include "os_solaris.inline.hpp"
54 54 #endif
55 55 #ifdef TARGET_OS_FAMILY_windows
56 56 # include "os_windows.inline.hpp"
57 57 #endif
58 58 #ifndef SERIALGC
59 59 #include "gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp"
60 60 #endif
61 61
62 62 #define DEFAULT_VENDOR_URL_BUG "http://java.sun.com/webapps/bugreport/crash.jsp"
63 63 #define DEFAULT_JAVA_LAUNCHER "generic"
64 64
65 65 char** Arguments::_jvm_flags_array = NULL;
66 66 int Arguments::_num_jvm_flags = 0;
67 67 char** Arguments::_jvm_args_array = NULL;
68 68 int Arguments::_num_jvm_args = 0;
69 69 char* Arguments::_java_command = NULL;
70 70 SystemProperty* Arguments::_system_properties = NULL;
71 71 const char* Arguments::_gc_log_filename = NULL;
72 72 bool Arguments::_has_profile = false;
73 73 bool Arguments::_has_alloc_profile = false;
74 74 uintx Arguments::_min_heap_size = 0;
75 75 Arguments::Mode Arguments::_mode = _mixed;
76 76 bool Arguments::_java_compiler = false;
77 77 bool Arguments::_xdebug_mode = false;
78 78 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
79 79 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
80 80 int Arguments::_sun_java_launcher_pid = -1;
81 81 bool Arguments::_created_by_gamma_launcher = false;
82 82
83 83 // These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*)
84 84 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
85 85 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
86 86 bool Arguments::_BackgroundCompilation = BackgroundCompilation;
87 87 bool Arguments::_ClipInlining = ClipInlining;
88 88
89 89 char* Arguments::SharedArchivePath = NULL;
90 90
91 91 AgentLibraryList Arguments::_libraryList;
92 92 AgentLibraryList Arguments::_agentList;
93 93
94 94 abort_hook_t Arguments::_abort_hook = NULL;
95 95 exit_hook_t Arguments::_exit_hook = NULL;
96 96 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
97 97
98 98
99 99 SystemProperty *Arguments::_java_ext_dirs = NULL;
100 100 SystemProperty *Arguments::_java_endorsed_dirs = NULL;
101 101 SystemProperty *Arguments::_sun_boot_library_path = NULL;
102 102 SystemProperty *Arguments::_java_library_path = NULL;
103 103 SystemProperty *Arguments::_java_home = NULL;
104 104 SystemProperty *Arguments::_java_class_path = NULL;
105 105 SystemProperty *Arguments::_sun_boot_class_path = NULL;
106 106
107 107 char* Arguments::_meta_index_path = NULL;
108 108 char* Arguments::_meta_index_dir = NULL;
109 109
110 110 static bool force_client_mode = false;
111 111
112 112 // Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string
113 113
114 114 static bool match_option(const JavaVMOption *option, const char* name,
115 115 const char** tail) {
116 116 int len = (int)strlen(name);
117 117 if (strncmp(option->optionString, name, len) == 0) {
118 118 *tail = option->optionString + len;
119 119 return true;
120 120 } else {
121 121 return false;
122 122 }
123 123 }
124 124
125 125 static void logOption(const char* opt) {
126 126 if (PrintVMOptions) {
127 127 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
128 128 }
129 129 }
130 130
131 131 // Process java launcher properties.
132 132 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
133 133 // See if sun.java.launcher or sun.java.launcher.pid is defined.
134 134 // Must do this before setting up other system properties,
135 135 // as some of them may depend on launcher type.
136 136 for (int index = 0; index < args->nOptions; index++) {
137 137 const JavaVMOption* option = args->options + index;
138 138 const char* tail;
139 139
140 140 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
141 141 process_java_launcher_argument(tail, option->extraInfo);
142 142 continue;
143 143 }
144 144 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
145 145 _sun_java_launcher_pid = atoi(tail);
146 146 continue;
147 147 }
148 148 }
149 149 }
150 150
151 151 // Initialize system properties key and value.
152 152 void Arguments::init_system_properties() {
153 153
154 154 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
155 155 "Java Virtual Machine Specification", false));
156 156 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
157 157 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
158 158 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true));
159 159
160 160 // following are JVMTI agent writeable properties.
161 161 // Properties values are set to NULL and they are
162 162 // os specific they are initialized in os::init_system_properties_values().
163 163 _java_ext_dirs = new SystemProperty("java.ext.dirs", NULL, true);
164 164 _java_endorsed_dirs = new SystemProperty("java.endorsed.dirs", NULL, true);
165 165 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
166 166 _java_library_path = new SystemProperty("java.library.path", NULL, true);
167 167 _java_home = new SystemProperty("java.home", NULL, true);
168 168 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true);
169 169
170 170 _java_class_path = new SystemProperty("java.class.path", "", true);
171 171
172 172 // Add to System Property list.
173 173 PropertyList_add(&_system_properties, _java_ext_dirs);
174 174 PropertyList_add(&_system_properties, _java_endorsed_dirs);
175 175 PropertyList_add(&_system_properties, _sun_boot_library_path);
176 176 PropertyList_add(&_system_properties, _java_library_path);
177 177 PropertyList_add(&_system_properties, _java_home);
178 178 PropertyList_add(&_system_properties, _java_class_path);
179 179 PropertyList_add(&_system_properties, _sun_boot_class_path);
180 180
181 181 // Set OS specific system properties values
182 182 os::init_system_properties_values();
183 183 }
184 184
185 185
186 186 // Update/Initialize System properties after JDK version number is known
187 187 void Arguments::init_version_specific_system_properties() {
188 188 enum { bufsz = 16 };
189 189 char buffer[bufsz];
190 190 const char* spec_vendor = "Sun Microsystems Inc.";
191 191 uint32_t spec_version = 0;
192 192
193 193 if (JDK_Version::is_gte_jdk17x_version()) {
194 194 spec_vendor = "Oracle Corporation";
195 195 spec_version = JDK_Version::current().major_version();
196 196 }
197 197 jio_snprintf(buffer, bufsz, "1." UINT32_FORMAT, spec_version);
198 198
199 199 PropertyList_add(&_system_properties,
200 200 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
201 201 PropertyList_add(&_system_properties,
202 202 new SystemProperty("java.vm.specification.version", buffer, false));
203 203 PropertyList_add(&_system_properties,
204 204 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
205 205 }
206 206
207 207 /**
208 208 * Provide a slightly more user-friendly way of eliminating -XX flags.
209 209 * When a flag is eliminated, it can be added to this list in order to
210 210 * continue accepting this flag on the command-line, while issuing a warning
211 211 * and ignoring the value. Once the JDK version reaches the 'accept_until'
212 212 * limit, we flatly refuse to admit the existence of the flag. This allows
213 213 * a flag to die correctly over JDK releases using HSX.
214 214 */
215 215 typedef struct {
216 216 const char* name;
217 217 JDK_Version obsoleted_in; // when the flag went away
218 218 JDK_Version accept_until; // which version to start denying the existence
219 219 } ObsoleteFlag;
220 220
221 221 static ObsoleteFlag obsolete_jvm_flags[] = {
222 222 { "UseTrainGC", JDK_Version::jdk(5), JDK_Version::jdk(7) },
223 223 { "UseSpecialLargeObjectHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) },
224 224 { "UseOversizedCarHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) },
225 225 { "TraceCarAllocation", JDK_Version::jdk(5), JDK_Version::jdk(7) },
226 226 { "PrintTrainGCProcessingStats", JDK_Version::jdk(5), JDK_Version::jdk(7) },
227 227 { "LogOfCarSpaceSize", JDK_Version::jdk(5), JDK_Version::jdk(7) },
228 228 { "OversizedCarThreshold", JDK_Version::jdk(5), JDK_Version::jdk(7) },
229 229 { "MinTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) },
230 230 { "DefaultTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) },
231 231 { "MaxTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) },
232 232 { "DelayTickAdjustment", JDK_Version::jdk(5), JDK_Version::jdk(7) },
233 233 { "ProcessingToTenuringRatio", JDK_Version::jdk(5), JDK_Version::jdk(7) },
234 234 { "MinTrainLength", JDK_Version::jdk(5), JDK_Version::jdk(7) },
235 235 { "AppendRatio", JDK_Version::jdk_update(6,10), JDK_Version::jdk(7) },
236 236 { "DefaultMaxRAM", JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) },
237 237 { "DefaultInitialRAMFraction",
238 238 JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) },
239 239 { "UseDepthFirstScavengeOrder",
240 240 JDK_Version::jdk_update(6,22), JDK_Version::jdk(7) },
241 241 { "HandlePromotionFailure",
242 242 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) },
243 243 { "MaxLiveObjectEvacuationRatio",
244 244 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) },
245 245 { "ForceSharedSpaces", JDK_Version::jdk_update(6,25), JDK_Version::jdk(8) },
246 246 { NULL, JDK_Version(0), JDK_Version(0) }
247 247 };
248 248
249 249 // Returns true if the flag is obsolete and fits into the range specified
250 250 // for being ignored. In the case that the flag is ignored, the 'version'
251 251 // value is filled in with the version number when the flag became
252 252 // obsolete so that that value can be displayed to the user.
253 253 bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) {
254 254 int i = 0;
255 255 assert(version != NULL, "Must provide a version buffer");
256 256 while (obsolete_jvm_flags[i].name != NULL) {
257 257 const ObsoleteFlag& flag_status = obsolete_jvm_flags[i];
258 258 // <flag>=xxx form
259 259 // [-|+]<flag> form
260 260 if ((strncmp(flag_status.name, s, strlen(flag_status.name)) == 0) ||
261 261 ((s[0] == '+' || s[0] == '-') &&
262 262 (strncmp(flag_status.name, &s[1], strlen(flag_status.name)) == 0))) {
263 263 if (JDK_Version::current().compare(flag_status.accept_until) == -1) {
264 264 *version = flag_status.obsoleted_in;
265 265 return true;
266 266 }
267 267 }
268 268 i++;
269 269 }
270 270 return false;
271 271 }
272 272
273 273 // Constructs the system class path (aka boot class path) from the following
274 274 // components, in order:
275 275 //
276 276 // prefix // from -Xbootclasspath/p:...
277 277 // endorsed // the expansion of -Djava.endorsed.dirs=...
278 278 // base // from os::get_system_properties() or -Xbootclasspath=
279 279 // suffix // from -Xbootclasspath/a:...
280 280 //
281 281 // java.endorsed.dirs is a list of directories; any jar or zip files in the
282 282 // directories are added to the sysclasspath just before the base.
283 283 //
284 284 // This could be AllStatic, but it isn't needed after argument processing is
285 285 // complete.
286 286 class SysClassPath: public StackObj {
287 287 public:
288 288 SysClassPath(const char* base);
289 289 ~SysClassPath();
290 290
291 291 inline void set_base(const char* base);
292 292 inline void add_prefix(const char* prefix);
293 293 inline void add_suffix_to_prefix(const char* suffix);
294 294 inline void add_suffix(const char* suffix);
295 295 inline void reset_path(const char* base);
296 296
297 297 // Expand the jar/zip files in each directory listed by the java.endorsed.dirs
298 298 // property. Must be called after all command-line arguments have been
299 299 // processed (in particular, -Djava.endorsed.dirs=...) and before calling
300 300 // combined_path().
301 301 void expand_endorsed();
302 302
303 303 inline const char* get_base() const { return _items[_scp_base]; }
304 304 inline const char* get_prefix() const { return _items[_scp_prefix]; }
305 305 inline const char* get_suffix() const { return _items[_scp_suffix]; }
306 306 inline const char* get_endorsed() const { return _items[_scp_endorsed]; }
307 307
308 308 // Combine all the components into a single c-heap-allocated string; caller
309 309 // must free the string if/when no longer needed.
310 310 char* combined_path();
311 311
312 312 private:
313 313 // Utility routines.
314 314 static char* add_to_path(const char* path, const char* str, bool prepend);
315 315 static char* add_jars_to_path(char* path, const char* directory);
316 316
317 317 inline void reset_item_at(int index);
318 318
319 319 // Array indices for the items that make up the sysclasspath. All except the
320 320 // base are allocated in the C heap and freed by this class.
321 321 enum {
322 322 _scp_prefix, // from -Xbootclasspath/p:...
323 323 _scp_endorsed, // the expansion of -Djava.endorsed.dirs=...
324 324 _scp_base, // the default sysclasspath
325 325 _scp_suffix, // from -Xbootclasspath/a:...
326 326 _scp_nitems // the number of items, must be last.
327 327 };
328 328
329 329 const char* _items[_scp_nitems];
330 330 DEBUG_ONLY(bool _expansion_done;)
331 331 };
332 332
333 333 SysClassPath::SysClassPath(const char* base) {
334 334 memset(_items, 0, sizeof(_items));
335 335 _items[_scp_base] = base;
336 336 DEBUG_ONLY(_expansion_done = false;)
337 337 }
338 338
339 339 SysClassPath::~SysClassPath() {
340 340 // Free everything except the base.
341 341 for (int i = 0; i < _scp_nitems; ++i) {
342 342 if (i != _scp_base) reset_item_at(i);
343 343 }
344 344 DEBUG_ONLY(_expansion_done = false;)
345 345 }
346 346
347 347 inline void SysClassPath::set_base(const char* base) {
348 348 _items[_scp_base] = base;
349 349 }
350 350
351 351 inline void SysClassPath::add_prefix(const char* prefix) {
352 352 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true);
353 353 }
354 354
355 355 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) {
356 356 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false);
357 357 }
358 358
359 359 inline void SysClassPath::add_suffix(const char* suffix) {
360 360 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false);
361 361 }
362 362
363 363 inline void SysClassPath::reset_item_at(int index) {
364 364 assert(index < _scp_nitems && index != _scp_base, "just checking");
365 365 if (_items[index] != NULL) {
366 366 FREE_C_HEAP_ARRAY(char, _items[index]);
367 367 _items[index] = NULL;
368 368 }
369 369 }
370 370
371 371 inline void SysClassPath::reset_path(const char* base) {
372 372 // Clear the prefix and suffix.
373 373 reset_item_at(_scp_prefix);
374 374 reset_item_at(_scp_suffix);
375 375 set_base(base);
376 376 }
377 377
378 378 //------------------------------------------------------------------------------
379 379
380 380 void SysClassPath::expand_endorsed() {
381 381 assert(_items[_scp_endorsed] == NULL, "can only be called once.");
382 382
383 383 const char* path = Arguments::get_property("java.endorsed.dirs");
384 384 if (path == NULL) {
385 385 path = Arguments::get_endorsed_dir();
386 386 assert(path != NULL, "no default for java.endorsed.dirs");
387 387 }
388 388
389 389 char* expanded_path = NULL;
390 390 const char separator = *os::path_separator();
391 391 const char* const end = path + strlen(path);
392 392 while (path < end) {
393 393 const char* tmp_end = strchr(path, separator);
394 394 if (tmp_end == NULL) {
395 395 expanded_path = add_jars_to_path(expanded_path, path);
396 396 path = end;
397 397 } else {
398 398 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1);
399 399 memcpy(dirpath, path, tmp_end - path);
400 400 dirpath[tmp_end - path] = '\0';
401 401 expanded_path = add_jars_to_path(expanded_path, dirpath);
402 402 FREE_C_HEAP_ARRAY(char, dirpath);
403 403 path = tmp_end + 1;
404 404 }
405 405 }
406 406 _items[_scp_endorsed] = expanded_path;
407 407 DEBUG_ONLY(_expansion_done = true;)
408 408 }
409 409
410 410 // Combine the bootclasspath elements, some of which may be null, into a single
411 411 // c-heap-allocated string.
412 412 char* SysClassPath::combined_path() {
413 413 assert(_items[_scp_base] != NULL, "empty default sysclasspath");
414 414 assert(_expansion_done, "must call expand_endorsed() first.");
415 415
416 416 size_t lengths[_scp_nitems];
417 417 size_t total_len = 0;
418 418
419 419 const char separator = *os::path_separator();
420 420
421 421 // Get the lengths.
422 422 int i;
423 423 for (i = 0; i < _scp_nitems; ++i) {
424 424 if (_items[i] != NULL) {
425 425 lengths[i] = strlen(_items[i]);
426 426 // Include space for the separator char (or a NULL for the last item).
427 427 total_len += lengths[i] + 1;
428 428 }
429 429 }
430 430 assert(total_len > 0, "empty sysclasspath not allowed");
431 431
432 432 // Copy the _items to a single string.
433 433 char* cp = NEW_C_HEAP_ARRAY(char, total_len);
434 434 char* cp_tmp = cp;
435 435 for (i = 0; i < _scp_nitems; ++i) {
436 436 if (_items[i] != NULL) {
437 437 memcpy(cp_tmp, _items[i], lengths[i]);
438 438 cp_tmp += lengths[i];
439 439 *cp_tmp++ = separator;
440 440 }
441 441 }
442 442 *--cp_tmp = '\0'; // Replace the extra separator.
443 443 return cp;
444 444 }
445 445
446 446 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
447 447 char*
448 448 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) {
449 449 char *cp;
450 450
451 451 assert(str != NULL, "just checking");
452 452 if (path == NULL) {
453 453 size_t len = strlen(str) + 1;
454 454 cp = NEW_C_HEAP_ARRAY(char, len);
455 455 memcpy(cp, str, len); // copy the trailing null
456 456 } else {
457 457 const char separator = *os::path_separator();
458 458 size_t old_len = strlen(path);
459 459 size_t str_len = strlen(str);
460 460 size_t len = old_len + str_len + 2;
461 461
462 462 if (prepend) {
463 463 cp = NEW_C_HEAP_ARRAY(char, len);
464 464 char* cp_tmp = cp;
465 465 memcpy(cp_tmp, str, str_len);
466 466 cp_tmp += str_len;
467 467 *cp_tmp = separator;
468 468 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null
469 469 FREE_C_HEAP_ARRAY(char, path);
470 470 } else {
471 471 cp = REALLOC_C_HEAP_ARRAY(char, path, len);
472 472 char* cp_tmp = cp + old_len;
473 473 *cp_tmp = separator;
474 474 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null
475 475 }
476 476 }
477 477 return cp;
478 478 }
479 479
480 480 // Scan the directory and append any jar or zip files found to path.
481 481 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
482 482 char* SysClassPath::add_jars_to_path(char* path, const char* directory) {
483 483 DIR* dir = os::opendir(directory);
484 484 if (dir == NULL) return path;
485 485
486 486 char dir_sep[2] = { '\0', '\0' };
487 487 size_t directory_len = strlen(directory);
488 488 const char fileSep = *os::file_separator();
489 489 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep;
490 490
491 491 /* Scan the directory for jars/zips, appending them to path. */
492 492 struct dirent *entry;
493 493 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory));
494 494 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
495 495 const char* name = entry->d_name;
496 496 const char* ext = name + strlen(name) - 4;
497 497 bool isJarOrZip = ext > name &&
498 498 (os::file_name_strcmp(ext, ".jar") == 0 ||
499 499 os::file_name_strcmp(ext, ".zip") == 0);
500 500 if (isJarOrZip) {
501 501 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name));
502 502 sprintf(jarpath, "%s%s%s", directory, dir_sep, name);
503 503 path = add_to_path(path, jarpath, false);
504 504 FREE_C_HEAP_ARRAY(char, jarpath);
505 505 }
506 506 }
507 507 FREE_C_HEAP_ARRAY(char, dbuf);
508 508 os::closedir(dir);
509 509 return path;
510 510 }
511 511
512 512 // Parses a memory size specification string.
513 513 static bool atomull(const char *s, julong* result) {
514 514 julong n = 0;
515 515 int args_read = sscanf(s, os::julong_format_specifier(), &n);
516 516 if (args_read != 1) {
517 517 return false;
518 518 }
519 519 while (*s != '\0' && isdigit(*s)) {
520 520 s++;
521 521 }
522 522 // 4705540: illegal if more characters are found after the first non-digit
523 523 if (strlen(s) > 1) {
524 524 return false;
525 525 }
526 526 switch (*s) {
527 527 case 'T': case 't':
528 528 *result = n * G * K;
529 529 // Check for overflow.
530 530 if (*result/((julong)G * K) != n) return false;
531 531 return true;
532 532 case 'G': case 'g':
533 533 *result = n * G;
534 534 if (*result/G != n) return false;
535 535 return true;
536 536 case 'M': case 'm':
537 537 *result = n * M;
538 538 if (*result/M != n) return false;
539 539 return true;
540 540 case 'K': case 'k':
541 541 *result = n * K;
542 542 if (*result/K != n) return false;
543 543 return true;
544 544 case '\0':
545 545 *result = n;
546 546 return true;
547 547 default:
548 548 return false;
549 549 }
550 550 }
551 551
552 552 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) {
553 553 if (size < min_size) return arg_too_small;
554 554 // Check that size will fit in a size_t (only relevant on 32-bit)
555 555 if (size > max_uintx) return arg_too_big;
556 556 return arg_in_range;
557 557 }
558 558
559 559 // Describe an argument out of range error
560 560 void Arguments::describe_range_error(ArgsRange errcode) {
561 561 switch(errcode) {
562 562 case arg_too_big:
563 563 jio_fprintf(defaultStream::error_stream(),
564 564 "The specified size exceeds the maximum "
565 565 "representable size.\n");
566 566 break;
567 567 case arg_too_small:
568 568 case arg_unreadable:
569 569 case arg_in_range:
570 570 // do nothing for now
571 571 break;
572 572 default:
573 573 ShouldNotReachHere();
574 574 }
575 575 }
576 576
577 577 static bool set_bool_flag(char* name, bool value, FlagValueOrigin origin) {
578 578 return CommandLineFlags::boolAtPut(name, &value, origin);
579 579 }
580 580
581 581 static bool set_fp_numeric_flag(char* name, char* value, FlagValueOrigin origin) {
582 582 double v;
583 583 if (sscanf(value, "%lf", &v) != 1) {
584 584 return false;
585 585 }
586 586
587 587 if (CommandLineFlags::doubleAtPut(name, &v, origin)) {
588 588 return true;
589 589 }
590 590 return false;
591 591 }
592 592
593 593 static bool set_numeric_flag(char* name, char* value, FlagValueOrigin origin) {
594 594 julong v;
595 595 intx intx_v;
596 596 bool is_neg = false;
597 597 // Check the sign first since atomull() parses only unsigned values.
598 598 if (*value == '-') {
599 599 if (!CommandLineFlags::intxAt(name, &intx_v)) {
600 600 return false;
601 601 }
602 602 value++;
603 603 is_neg = true;
604 604 }
605 605 if (!atomull(value, &v)) {
606 606 return false;
607 607 }
608 608 intx_v = (intx) v;
609 609 if (is_neg) {
610 610 intx_v = -intx_v;
611 611 }
612 612 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) {
613 613 return true;
614 614 }
615 615 uintx uintx_v = (uintx) v;
616 616 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) {
617 617 return true;
618 618 }
619 619 uint64_t uint64_t_v = (uint64_t) v;
620 620 if (!is_neg && CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin)) {
621 621 return true;
622 622 }
623 623 return false;
624 624 }
625 625
626 626 static bool set_string_flag(char* name, const char* value, FlagValueOrigin origin) {
627 627 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false;
628 628 // Contract: CommandLineFlags always returns a pointer that needs freeing.
629 629 FREE_C_HEAP_ARRAY(char, value);
630 630 return true;
631 631 }
632 632
633 633 static bool append_to_string_flag(char* name, const char* new_value, FlagValueOrigin origin) {
634 634 const char* old_value = "";
635 635 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false;
636 636 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
637 637 size_t new_len = strlen(new_value);
638 638 const char* value;
639 639 char* free_this_too = NULL;
640 640 if (old_len == 0) {
641 641 value = new_value;
642 642 } else if (new_len == 0) {
643 643 value = old_value;
644 644 } else {
645 645 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1);
646 646 // each new setting adds another LINE to the switch:
647 647 sprintf(buf, "%s\n%s", old_value, new_value);
648 648 value = buf;
649 649 free_this_too = buf;
650 650 }
651 651 (void) CommandLineFlags::ccstrAtPut(name, &value, origin);
652 652 // CommandLineFlags always returns a pointer that needs freeing.
653 653 FREE_C_HEAP_ARRAY(char, value);
654 654 if (free_this_too != NULL) {
655 655 // CommandLineFlags made its own copy, so I must delete my own temp. buffer.
656 656 FREE_C_HEAP_ARRAY(char, free_this_too);
657 657 }
658 658 return true;
659 659 }
660 660
661 661 bool Arguments::parse_argument(const char* arg, FlagValueOrigin origin) {
662 662
663 663 // range of acceptable characters spelled out for portability reasons
664 664 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
665 665 #define BUFLEN 255
666 666 char name[BUFLEN+1];
667 667 char dummy;
668 668
669 669 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
670 670 return set_bool_flag(name, false, origin);
671 671 }
672 672 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
673 673 return set_bool_flag(name, true, origin);
674 674 }
675 675
676 676 char punct;
677 677 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
678 678 const char* value = strchr(arg, '=') + 1;
679 679 Flag* flag = Flag::find_flag(name, strlen(name));
680 680 if (flag != NULL && flag->is_ccstr()) {
681 681 if (flag->ccstr_accumulates()) {
682 682 return append_to_string_flag(name, value, origin);
683 683 } else {
684 684 if (value[0] == '\0') {
685 685 value = NULL;
686 686 }
687 687 return set_string_flag(name, value, origin);
688 688 }
689 689 }
690 690 }
691 691
692 692 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
693 693 const char* value = strchr(arg, '=') + 1;
694 694 // -XX:Foo:=xxx will reset the string flag to the given value.
695 695 if (value[0] == '\0') {
696 696 value = NULL;
697 697 }
698 698 return set_string_flag(name, value, origin);
699 699 }
700 700
701 701 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]"
702 702 #define SIGNED_NUMBER_RANGE "[-0123456789]"
703 703 #define NUMBER_RANGE "[0123456789]"
704 704 char value[BUFLEN + 1];
705 705 char value2[BUFLEN + 1];
706 706 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
707 707 // Looks like a floating-point number -- try again with more lenient format string
708 708 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
709 709 return set_fp_numeric_flag(name, value, origin);
710 710 }
711 711 }
712 712
713 713 #define VALUE_RANGE "[-kmgtKMGT0123456789]"
714 714 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
715 715 return set_numeric_flag(name, value, origin);
716 716 }
717 717
718 718 return false;
719 719 }
720 720
721 721 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
722 722 assert(bldarray != NULL, "illegal argument");
723 723
724 724 if (arg == NULL) {
725 725 return;
726 726 }
727 727
728 728 int index = *count;
729 729
730 730 // expand the array and add arg to the last element
731 731 (*count)++;
732 732 if (*bldarray == NULL) {
733 733 *bldarray = NEW_C_HEAP_ARRAY(char*, *count);
734 734 } else {
735 735 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, *count);
736 736 }
737 737 (*bldarray)[index] = strdup(arg);
738 738 }
739 739
740 740 void Arguments::build_jvm_args(const char* arg) {
741 741 add_string(&_jvm_args_array, &_num_jvm_args, arg);
742 742 }
743 743
744 744 void Arguments::build_jvm_flags(const char* arg) {
745 745 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
746 746 }
747 747
748 748 // utility function to return a string that concatenates all
749 749 // strings in a given char** array
750 750 const char* Arguments::build_resource_string(char** args, int count) {
751 751 if (args == NULL || count == 0) {
752 752 return NULL;
753 753 }
754 754 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator
755 755 for (int i = 1; i < count; i++) {
756 756 length += strlen(args[i]) + 1; // add 1 for a space
757 757 }
758 758 char* s = NEW_RESOURCE_ARRAY(char, length);
759 759 strcpy(s, args[0]);
760 760 for (int j = 1; j < count; j++) {
761 761 strcat(s, " ");
762 762 strcat(s, args[j]);
763 763 }
764 764 return (const char*) s;
765 765 }
766 766
767 767 void Arguments::print_on(outputStream* st) {
768 768 st->print_cr("VM Arguments:");
769 769 if (num_jvm_flags() > 0) {
770 770 st->print("jvm_flags: "); print_jvm_flags_on(st);
771 771 }
772 772 if (num_jvm_args() > 0) {
773 773 st->print("jvm_args: "); print_jvm_args_on(st);
774 774 }
775 775 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
776 776 st->print_cr("Launcher Type: %s", _sun_java_launcher);
777 777 }
778 778
779 779 void Arguments::print_jvm_flags_on(outputStream* st) {
780 780 if (_num_jvm_flags > 0) {
781 781 for (int i=0; i < _num_jvm_flags; i++) {
782 782 st->print("%s ", _jvm_flags_array[i]);
783 783 }
784 784 st->print_cr("");
785 785 }
786 786 }
787 787
788 788 void Arguments::print_jvm_args_on(outputStream* st) {
789 789 if (_num_jvm_args > 0) {
790 790 for (int i=0; i < _num_jvm_args; i++) {
791 791 st->print("%s ", _jvm_args_array[i]);
792 792 }
793 793 st->print_cr("");
794 794 }
795 795 }
796 796
797 797 bool Arguments::process_argument(const char* arg,
798 798 jboolean ignore_unrecognized, FlagValueOrigin origin) {
799 799
800 800 JDK_Version since = JDK_Version();
801 801
802 802 if (parse_argument(arg, origin)) {
803 803 // do nothing
804 804 } else if (is_newly_obsolete(arg, &since)) {
805 805 enum { bufsize = 256 };
806 806 char buffer[bufsize];
807 807 since.to_string(buffer, bufsize);
808 808 jio_fprintf(defaultStream::error_stream(),
809 809 "Warning: The flag %s has been EOL'd as of %s and will"
810 810 " be ignored\n", arg, buffer);
811 811 } else {
812 812 if (!ignore_unrecognized) {
813 813 jio_fprintf(defaultStream::error_stream(),
814 814 "Unrecognized VM option '%s'\n", arg);
815 815 // allow for commandline "commenting out" options like -XX:#+Verbose
816 816 if (strlen(arg) == 0 || arg[0] != '#') {
817 817 return false;
818 818 }
819 819 }
820 820 }
821 821 return true;
822 822 }
823 823
824 824 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
825 825 FILE* stream = fopen(file_name, "rb");
826 826 if (stream == NULL) {
827 827 if (should_exist) {
828 828 jio_fprintf(defaultStream::error_stream(),
829 829 "Could not open settings file %s\n", file_name);
830 830 return false;
831 831 } else {
832 832 return true;
833 833 }
834 834 }
835 835
836 836 char token[1024];
837 837 int pos = 0;
838 838
839 839 bool in_white_space = true;
840 840 bool in_comment = false;
841 841 bool in_quote = false;
842 842 char quote_c = 0;
843 843 bool result = true;
844 844
845 845 int c = getc(stream);
846 846 while(c != EOF) {
847 847 if (in_white_space) {
848 848 if (in_comment) {
849 849 if (c == '\n') in_comment = false;
850 850 } else {
851 851 if (c == '#') in_comment = true;
852 852 else if (!isspace(c)) {
853 853 in_white_space = false;
854 854 token[pos++] = c;
855 855 }
856 856 }
857 857 } else {
858 858 if (c == '\n' || (!in_quote && isspace(c))) {
859 859 // token ends at newline, or at unquoted whitespace
860 860 // this allows a way to include spaces in string-valued options
861 861 token[pos] = '\0';
862 862 logOption(token);
863 863 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE);
864 864 build_jvm_flags(token);
865 865 pos = 0;
866 866 in_white_space = true;
867 867 in_quote = false;
868 868 } else if (!in_quote && (c == '\'' || c == '"')) {
869 869 in_quote = true;
870 870 quote_c = c;
871 871 } else if (in_quote && (c == quote_c)) {
872 872 in_quote = false;
873 873 } else {
874 874 token[pos++] = c;
875 875 }
876 876 }
877 877 c = getc(stream);
878 878 }
879 879 if (pos > 0) {
880 880 token[pos] = '\0';
881 881 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE);
882 882 build_jvm_flags(token);
883 883 }
884 884 fclose(stream);
885 885 return result;
886 886 }
887 887
888 888 //=============================================================================================================
889 889 // Parsing of properties (-D)
890 890
891 891 const char* Arguments::get_property(const char* key) {
892 892 return PropertyList_get_value(system_properties(), key);
893 893 }
894 894
895 895 bool Arguments::add_property(const char* prop) {
896 896 const char* eq = strchr(prop, '=');
897 897 char* key;
898 898 // ns must be static--its address may be stored in a SystemProperty object.
899 899 const static char ns[1] = {0};
900 900 char* value = (char *)ns;
901 901
902 902 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop);
903 903 key = AllocateHeap(key_len + 1, "add_property");
904 904 strncpy(key, prop, key_len);
905 905 key[key_len] = '\0';
906 906
907 907 if (eq != NULL) {
908 908 size_t value_len = strlen(prop) - key_len - 1;
909 909 value = AllocateHeap(value_len + 1, "add_property");
910 910 strncpy(value, &prop[key_len + 1], value_len + 1);
911 911 }
912 912
913 913 if (strcmp(key, "java.compiler") == 0) {
914 914 process_java_compiler_argument(value);
915 915 FreeHeap(key);
916 916 if (eq != NULL) {
917 917 FreeHeap(value);
918 918 }
919 919 return true;
920 920 } else if (strcmp(key, "sun.java.command") == 0) {
921 921 _java_command = value;
922 922
923 923 // Record value in Arguments, but let it get passed to Java.
924 924 } else if (strcmp(key, "sun.java.launcher.pid") == 0) {
925 925 // launcher.pid property is private and is processed
926 926 // in process_sun_java_launcher_properties();
927 927 // the sun.java.launcher property is passed on to the java application
928 928 FreeHeap(key);
929 929 if (eq != NULL) {
930 930 FreeHeap(value);
931 931 }
932 932 return true;
933 933 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
934 934 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
935 935 // its value without going through the property list or making a Java call.
936 936 _java_vendor_url_bug = value;
937 937 } else if (strcmp(key, "sun.boot.library.path") == 0) {
938 938 PropertyList_unique_add(&_system_properties, key, value, true);
939 939 return true;
940 940 }
941 941 // Create new property and add at the end of the list
942 942 PropertyList_unique_add(&_system_properties, key, value);
943 943 return true;
944 944 }
945 945
946 946 //===========================================================================================================
947 947 // Setting int/mixed/comp mode flags
948 948
949 949 void Arguments::set_mode_flags(Mode mode) {
950 950 // Set up default values for all flags.
951 951 // If you add a flag to any of the branches below,
952 952 // add a default value for it here.
953 953 set_java_compiler(false);
954 954 _mode = mode;
955 955
956 956 // Ensure Agent_OnLoad has the correct initial values.
957 957 // This may not be the final mode; mode may change later in onload phase.
958 958 PropertyList_unique_add(&_system_properties, "java.vm.info",
959 959 (char*)Abstract_VM_Version::vm_info_string(), false);
960 960
961 961 UseInterpreter = true;
962 962 UseCompiler = true;
963 963 UseLoopCounter = true;
964 964
965 965 // Default values may be platform/compiler dependent -
966 966 // use the saved values
967 967 ClipInlining = Arguments::_ClipInlining;
968 968 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
969 969 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
970 970 BackgroundCompilation = Arguments::_BackgroundCompilation;
971 971
972 972 // Change from defaults based on mode
973 973 switch (mode) {
974 974 default:
975 975 ShouldNotReachHere();
976 976 break;
977 977 case _int:
978 978 UseCompiler = false;
979 979 UseLoopCounter = false;
980 980 AlwaysCompileLoopMethods = false;
981 981 UseOnStackReplacement = false;
982 982 break;
983 983 case _mixed:
984 984 // same as default
985 985 break;
986 986 case _comp:
987 987 UseInterpreter = false;
988 988 BackgroundCompilation = false;
989 989 ClipInlining = false;
990 990 break;
991 991 }
992 992 }
993 993
994 994 // Conflict: required to use shared spaces (-Xshare:on), but
995 995 // incompatible command line options were chosen.
996 996
997 997 static void no_shared_spaces() {
998 998 if (RequireSharedSpaces) {
999 999 jio_fprintf(defaultStream::error_stream(),
1000 1000 "Class data sharing is inconsistent with other specified options.\n");
1001 1001 vm_exit_during_initialization("Unable to use shared archive.", NULL);
1002 1002 } else {
1003 1003 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1004 1004 }
1005 1005 }
1006 1006
1007 1007 void Arguments::set_tiered_flags() {
1008 1008 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
1009 1009 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1010 1010 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
1011 1011 }
1012 1012 if (CompilationPolicyChoice < 2) {
1013 1013 vm_exit_during_initialization(
1014 1014 "Incompatible compilation policy selected", NULL);
1015 1015 }
1016 1016 // Increase the code cache size - tiered compiles a lot more.
1017 1017 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1018 1018 FLAG_SET_DEFAULT(ReservedCodeCacheSize, ReservedCodeCacheSize * 2);
1019 1019 }
1020 1020 }
1021 1021
1022 1022 #ifndef KERNEL
1023 1023 // If the user has chosen ParallelGCThreads > 0, we set UseParNewGC
1024 1024 // if it's not explictly set or unset. If the user has chosen
1025 1025 // UseParNewGC and not explicitly set ParallelGCThreads we
1026 1026 // set it, unless this is a single cpu machine.
1027 1027 void Arguments::set_parnew_gc_flags() {
1028 1028 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC,
1029 1029 "control point invariant");
1030 1030 assert(UseParNewGC, "Error");
1031 1031
1032 1032 // Turn off AdaptiveSizePolicy by default for parnew until it is
1033 1033 // complete.
1034 1034 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) {
1035 1035 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false);
1036 1036 }
1037 1037
1038 1038 if (ParallelGCThreads == 0) {
1039 1039 FLAG_SET_DEFAULT(ParallelGCThreads,
1040 1040 Abstract_VM_Version::parallel_worker_threads());
1041 1041 if (ParallelGCThreads == 1) {
1042 1042 FLAG_SET_DEFAULT(UseParNewGC, false);
1043 1043 FLAG_SET_DEFAULT(ParallelGCThreads, 0);
1044 1044 }
1045 1045 }
1046 1046 if (UseParNewGC) {
1047 1047 // CDS doesn't work with ParNew yet
1048 1048 no_shared_spaces();
1049 1049
1050 1050 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively,
1051 1051 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration
1052 1052 // we set them to 1024 and 1024.
1053 1053 // See CR 6362902.
1054 1054 if (FLAG_IS_DEFAULT(YoungPLABSize)) {
1055 1055 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024);
1056 1056 }
1057 1057 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1058 1058 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024);
1059 1059 }
1060 1060
1061 1061 // AlwaysTenure flag should make ParNew promote all at first collection.
1062 1062 // See CR 6362902.
1063 1063 if (AlwaysTenure) {
1064 1064 FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0);
1065 1065 }
1066 1066 // When using compressed oops, we use local overflow stacks,
1067 1067 // rather than using a global overflow list chained through
1068 1068 // the klass word of the object's pre-image.
1069 1069 if (UseCompressedOops && !ParGCUseLocalOverflow) {
1070 1070 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) {
1071 1071 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references");
1072 1072 }
1073 1073 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true);
1074 1074 }
1075 1075 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error");
1076 1076 }
1077 1077 }
1078 1078
1079 1079 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on
1080 1080 // sparc/solaris for certain applications, but would gain from
1081 1081 // further optimization and tuning efforts, and would almost
1082 1082 // certainly gain from analysis of platform and environment.
1083 1083 void Arguments::set_cms_and_parnew_gc_flags() {
1084 1084 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error");
1085 1085 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1086 1086
1087 1087 // If we are using CMS, we prefer to UseParNewGC,
1088 1088 // unless explicitly forbidden.
1089 1089 if (FLAG_IS_DEFAULT(UseParNewGC)) {
1090 1090 FLAG_SET_ERGO(bool, UseParNewGC, true);
1091 1091 }
1092 1092
1093 1093 // Turn off AdaptiveSizePolicy by default for cms until it is
1094 1094 // complete.
1095 1095 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) {
1096 1096 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false);
1097 1097 }
1098 1098
1099 1099 // In either case, adjust ParallelGCThreads and/or UseParNewGC
1100 1100 // as needed.
1101 1101 if (UseParNewGC) {
1102 1102 set_parnew_gc_flags();
1103 1103 }
1104 1104
1105 1105 // MaxHeapSize is aligned down in collectorPolicy
1106 1106 size_t max_heap = align_size_down(MaxHeapSize,
1107 1107 CardTableRS::ct_max_alignment_constraint());
1108 1108
1109 1109 // Now make adjustments for CMS
1110 1110 intx tenuring_default = (intx)6;
1111 1111 size_t young_gen_per_worker = CMSYoungGenPerWorker;
1112 1112
1113 1113 // Preferred young gen size for "short" pauses:
1114 1114 // upper bound depends on # of threads and NewRatio.
1115 1115 const uintx parallel_gc_threads =
1116 1116 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads);
1117 1117 const size_t preferred_max_new_size_unaligned =
1118 1118 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * parallel_gc_threads));
1119 1119 size_t preferred_max_new_size =
1120 1120 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size());
1121 1121
1122 1122 // Unless explicitly requested otherwise, size young gen
1123 1123 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads
1124 1124
1125 1125 // If either MaxNewSize or NewRatio is set on the command line,
1126 1126 // assume the user is trying to set the size of the young gen.
1127 1127 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) {
1128 1128
1129 1129 // Set MaxNewSize to our calculated preferred_max_new_size unless
1130 1130 // NewSize was set on the command line and it is larger than
1131 1131 // preferred_max_new_size.
1132 1132 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line
1133 1133 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size));
1134 1134 } else {
1135 1135 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size);
1136 1136 }
1137 1137 if (PrintGCDetails && Verbose) {
1138 1138 // Too early to use gclog_or_tty
1139 1139 tty->print_cr("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize);
1140 1140 }
1141 1141
1142 1142 // Code along this path potentially sets NewSize and OldSize
1143 1143
1144 1144 assert(max_heap >= InitialHeapSize, "Error");
1145 1145 assert(max_heap >= NewSize, "Error");
1146 1146
1147 1147 if (PrintGCDetails && Verbose) {
1148 1148 // Too early to use gclog_or_tty
1149 1149 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT
1150 1150 " initial_heap_size: " SIZE_FORMAT
1151 1151 " max_heap: " SIZE_FORMAT,
1152 1152 min_heap_size(), InitialHeapSize, max_heap);
1153 1153 }
1154 1154 size_t min_new = preferred_max_new_size;
1155 1155 if (FLAG_IS_CMDLINE(NewSize)) {
1156 1156 min_new = NewSize;
1157 1157 }
1158 1158 if (max_heap > min_new && min_heap_size() > min_new) {
1159 1159 // Unless explicitly requested otherwise, make young gen
1160 1160 // at least min_new, and at most preferred_max_new_size.
1161 1161 if (FLAG_IS_DEFAULT(NewSize)) {
1162 1162 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new));
1163 1163 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize));
1164 1164 if (PrintGCDetails && Verbose) {
1165 1165 // Too early to use gclog_or_tty
1166 1166 tty->print_cr("CMS ergo set NewSize: " SIZE_FORMAT, NewSize);
1167 1167 }
1168 1168 }
1169 1169 // Unless explicitly requested otherwise, size old gen
1170 1170 // so it's NewRatio x of NewSize.
1171 1171 if (FLAG_IS_DEFAULT(OldSize)) {
1172 1172 if (max_heap > NewSize) {
1173 1173 FLAG_SET_ERGO(uintx, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize));
1174 1174 if (PrintGCDetails && Verbose) {
1175 1175 // Too early to use gclog_or_tty
1176 1176 tty->print_cr("CMS ergo set OldSize: " SIZE_FORMAT, OldSize);
1177 1177 }
1178 1178 }
1179 1179 }
1180 1180 }
1181 1181 }
1182 1182 // Unless explicitly requested otherwise, definitely
1183 1183 // promote all objects surviving "tenuring_default" scavenges.
1184 1184 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) &&
1185 1185 FLAG_IS_DEFAULT(SurvivorRatio)) {
1186 1186 FLAG_SET_ERGO(intx, MaxTenuringThreshold, tenuring_default);
1187 1187 }
1188 1188 // If we decided above (or user explicitly requested)
1189 1189 // `promote all' (via MaxTenuringThreshold := 0),
1190 1190 // prefer minuscule survivor spaces so as not to waste
1191 1191 // space for (non-existent) survivors
1192 1192 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) {
1193 1193 FLAG_SET_ERGO(intx, SurvivorRatio, MAX2((intx)1024, SurvivorRatio));
1194 1194 }
1195 1195 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not,
1196 1196 // set CMSParPromoteBlocksToClaim equal to OldPLABSize.
1197 1197 // This is done in order to make ParNew+CMS configuration to work
1198 1198 // with YoungPLABSize and OldPLABSize options.
1199 1199 // See CR 6362902.
1200 1200 if (!FLAG_IS_DEFAULT(OldPLABSize)) {
1201 1201 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) {
1202 1202 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim
1203 1203 // is. In this situtation let CMSParPromoteBlocksToClaim follow
1204 1204 // the value (either from the command line or ergonomics) of
1205 1205 // OldPLABSize. Following OldPLABSize is an ergonomics decision.
1206 1206 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize);
1207 1207 } else {
1208 1208 // OldPLABSize and CMSParPromoteBlocksToClaim are both set.
1209 1209 // CMSParPromoteBlocksToClaim is a collector-specific flag, so
1210 1210 // we'll let it to take precedence.
1211 1211 jio_fprintf(defaultStream::error_stream(),
1212 1212 "Both OldPLABSize and CMSParPromoteBlocksToClaim"
1213 1213 " options are specified for the CMS collector."
1214 1214 " CMSParPromoteBlocksToClaim will take precedence.\n");
1215 1215 }
1216 1216 }
1217 1217 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) {
1218 1218 // OldPLAB sizing manually turned off: Use a larger default setting,
1219 1219 // unless it was manually specified. This is because a too-low value
1220 1220 // will slow down scavenges.
1221 1221 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) {
1222 1222 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, 50); // default value before 6631166
1223 1223 }
1224 1224 }
1225 1225 // Overwrite OldPLABSize which is the variable we will internally use everywhere.
1226 1226 FLAG_SET_ERGO(uintx, OldPLABSize, CMSParPromoteBlocksToClaim);
1227 1227 // If either of the static initialization defaults have changed, note this
1228 1228 // modification.
1229 1229 if (!FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim) || !FLAG_IS_DEFAULT(OldPLABWeight)) {
1230 1230 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight);
1231 1231 }
1232 1232 if (PrintGCDetails && Verbose) {
1233 1233 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1234 1234 MarkStackSize / K, MarkStackSizeMax / K);
1235 1235 tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
1236 1236 }
1237 1237 }
1238 1238 #endif // KERNEL
1239 1239
1240 1240 void set_object_alignment() {
1241 1241 // Object alignment.
1242 1242 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1243 1243 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1244 1244 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1245 1245 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1246 1246 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1247 1247 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1248 1248
1249 1249 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1250 1250 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1251 1251
1252 1252 // Oop encoding heap max
1253 1253 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1254 1254
1255 1255 #ifndef KERNEL
1256 1256 // Set CMS global values
1257 1257 CompactibleFreeListSpace::set_cms_values();
1258 1258 #endif // KERNEL
1259 1259 }
1260 1260
1261 1261 bool verify_object_alignment() {
1262 1262 // Object alignment.
1263 1263 if (!is_power_of_2(ObjectAlignmentInBytes)) {
1264 1264 jio_fprintf(defaultStream::error_stream(),
1265 1265 "error: ObjectAlignmentInBytes=%d must be power of 2\n",
1266 1266 (int)ObjectAlignmentInBytes);
1267 1267 return false;
1268 1268 }
1269 1269 if ((int)ObjectAlignmentInBytes < BytesPerLong) {
1270 1270 jio_fprintf(defaultStream::error_stream(),
1271 1271 "error: ObjectAlignmentInBytes=%d must be greater or equal %d\n",
1272 1272 (int)ObjectAlignmentInBytes, BytesPerLong);
1273 1273 return false;
1274 1274 }
1275 1275 // It does not make sense to have big object alignment
1276 1276 // since a space lost due to alignment will be greater
1277 1277 // then a saved space from compressed oops.
1278 1278 if ((int)ObjectAlignmentInBytes > 256) {
1279 1279 jio_fprintf(defaultStream::error_stream(),
1280 1280 "error: ObjectAlignmentInBytes=%d must not be greater then 256\n",
1281 1281 (int)ObjectAlignmentInBytes);
1282 1282 return false;
1283 1283 }
1284 1284 // In case page size is very small.
1285 1285 if ((int)ObjectAlignmentInBytes >= os::vm_page_size()) {
1286 1286 jio_fprintf(defaultStream::error_stream(),
1287 1287 "error: ObjectAlignmentInBytes=%d must be less then page size %d\n",
1288 1288 (int)ObjectAlignmentInBytes, os::vm_page_size());
1289 1289 return false;
1290 1290 }
1291 1291 return true;
1292 1292 }
1293 1293
1294 1294 inline uintx max_heap_for_compressed_oops() {
1295 1295 // Avoid sign flip.
1296 1296 if (OopEncodingHeapMax < MaxPermSize + os::vm_page_size()) {
1297 1297 return 0;
1298 1298 }
1299 1299 LP64_ONLY(return OopEncodingHeapMax - MaxPermSize - os::vm_page_size());
1300 1300 NOT_LP64(ShouldNotReachHere(); return 0);
1301 1301 }
1302 1302
1303 1303 bool Arguments::should_auto_select_low_pause_collector() {
1304 1304 if (UseAutoGCSelectPolicy &&
1305 1305 !FLAG_IS_DEFAULT(MaxGCPauseMillis) &&
1306 1306 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) {
1307 1307 if (PrintGCDetails) {
1308 1308 // Cannot use gclog_or_tty yet.
1309 1309 tty->print_cr("Automatic selection of the low pause collector"
1310 1310 " based on pause goal of %d (ms)", MaxGCPauseMillis);
1311 1311 }
1312 1312 return true;
1313 1313 }
1314 1314 return false;
1315 1315 }
1316 1316
1317 1317 void Arguments::set_ergonomics_flags() {
1318 1318 // Parallel GC is not compatible with sharing. If one specifies
1319 1319 // that they want sharing explicitly, do not set ergonomics flags.
1320 1320 if (DumpSharedSpaces || RequireSharedSpaces) {
1321 1321 return;
1322 1322 }
1323 1323
1324 1324 if (os::is_server_class_machine() && !force_client_mode ) {
1325 1325 // If no other collector is requested explicitly,
1326 1326 // let the VM select the collector based on
1327 1327 // machine class and automatic selection policy.
1328 1328 if (!UseSerialGC &&
1329 1329 !UseConcMarkSweepGC &&
1330 1330 !UseG1GC &&
1331 1331 !UseParNewGC &&
1332 1332 !DumpSharedSpaces &&
1333 1333 FLAG_IS_DEFAULT(UseParallelGC)) {
1334 1334 if (should_auto_select_low_pause_collector()) {
1335 1335 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true);
1336 1336 } else {
1337 1337 FLAG_SET_ERGO(bool, UseParallelGC, true);
1338 1338 }
1339 1339 no_shared_spaces();
1340 1340 }
1341 1341 }
1342 1342
1343 1343 #ifndef ZERO
1344 1344 #ifdef _LP64
1345 1345 // Check that UseCompressedOops can be set with the max heap size allocated
1346 1346 // by ergonomics.
1347 1347 if (MaxHeapSize <= max_heap_for_compressed_oops()) {
1348 1348 #if !defined(COMPILER1) || defined(TIERED)
1349 1349 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1350 1350 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1351 1351 }
1352 1352 #endif
1353 1353 #ifdef _WIN64
1354 1354 if (UseLargePages && UseCompressedOops) {
1355 1355 // Cannot allocate guard pages for implicit checks in indexed addressing
1356 1356 // mode, when large pages are specified on windows.
1357 1357 // This flag could be switched ON if narrow oop base address is set to 0,
1358 1358 // see code in Universe::initialize_heap().
1359 1359 Universe::set_narrow_oop_use_implicit_null_checks(false);
1360 1360 }
1361 1361 #endif // _WIN64
1362 1362 } else {
1363 1363 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1364 1364 warning("Max heap size too large for Compressed Oops");
1365 1365 FLAG_SET_DEFAULT(UseCompressedOops, false);
1366 1366 }
1367 1367 }
1368 1368 // Also checks that certain machines are slower with compressed oops
1369 1369 // in vm_version initialization code.
1370 1370 #endif // _LP64
1371 1371 #endif // !ZERO
1372 1372 }
1373 1373
1374 1374 void Arguments::set_parallel_gc_flags() {
1375 1375 assert(UseParallelGC || UseParallelOldGC, "Error");
1376 1376 // If parallel old was requested, automatically enable parallel scavenge.
1377 1377 if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) {
1378 1378 FLAG_SET_DEFAULT(UseParallelGC, true);
1379 1379 }
1380 1380
1381 1381 // If no heap maximum was requested explicitly, use some reasonable fraction
1382 1382 // of the physical memory, up to a maximum of 1GB.
1383 1383 if (UseParallelGC) {
1384 1384 FLAG_SET_ERGO(uintx, ParallelGCThreads,
1385 1385 Abstract_VM_Version::parallel_worker_threads());
1386 1386
1387 1387 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
1388 1388 // SurvivorRatio has been set, reset their default values to SurvivorRatio +
1389 1389 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
1390 1390 // See CR 6362902 for details.
1391 1391 if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
1392 1392 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
1393 1393 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
1394 1394 }
1395 1395 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
1396 1396 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
1397 1397 }
1398 1398 }
1399 1399
1400 1400 if (UseParallelOldGC) {
1401 1401 // Par compact uses lower default values since they are treated as
1402 1402 // minimums. These are different defaults because of the different
1403 1403 // interpretation and are not ergonomically set.
1404 1404 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) {
1405 1405 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1);
1406 1406 }
1407 1407 if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) {
1408 1408 FLAG_SET_DEFAULT(PermMarkSweepDeadRatio, 5);
1409 1409 }
1410 1410 }
1411 1411 }
1412 1412 }
1413 1413
1414 1414 void Arguments::set_g1_gc_flags() {
1415 1415 assert(UseG1GC, "Error");
1416 1416 #ifdef COMPILER1
1417 1417 FastTLABRefill = false;
1418 1418 #endif
1419 1419 FLAG_SET_DEFAULT(ParallelGCThreads,
1420 1420 Abstract_VM_Version::parallel_worker_threads());
1421 1421 if (ParallelGCThreads == 0) {
1422 1422 FLAG_SET_DEFAULT(ParallelGCThreads,
1423 1423 Abstract_VM_Version::parallel_worker_threads());
1424 1424 }
1425 1425 no_shared_spaces();
1426 1426
1427 1427 if (FLAG_IS_DEFAULT(MarkStackSize)) {
1428 1428 FLAG_SET_DEFAULT(MarkStackSize, 128 * TASKQUEUE_SIZE);
1429 1429 }
1430 1430 if (PrintGCDetails && Verbose) {
1431 1431 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1432 1432 MarkStackSize / K, MarkStackSizeMax / K);
1433 1433 tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
1434 1434 }
1435 1435
1436 1436 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
1437 1437 // In G1, we want the default GC overhead goal to be higher than
1438 1438 // say in PS. So we set it here to 10%. Otherwise the heap might
1439 1439 // be expanded more aggressively than we would like it to. In
1440 1440 // fact, even 10% seems to not be high enough in some cases
1441 1441 // (especially small GC stress tests that the main thing they do
1442 1442 // is allocation). We might consider increase it further.
1443 1443 FLAG_SET_DEFAULT(GCTimeRatio, 9);
1444 1444 }
1445 1445 }
1446 1446
1447 1447 void Arguments::set_heap_size() {
1448 1448 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) {
1449 1449 // Deprecated flag
1450 1450 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction);
1451 1451 }
1452 1452
1453 1453 const julong phys_mem =
1454 1454 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1455 1455 : (julong)MaxRAM;
1456 1456
1457 1457 // If the maximum heap size has not been set with -Xmx,
1458 1458 // then set it as fraction of the size of physical memory,
1459 1459 // respecting the maximum and minimum sizes of the heap.
1460 1460 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1461 1461 julong reasonable_max = phys_mem / MaxRAMFraction;
1462 1462
1463 1463 if (phys_mem <= MaxHeapSize * MinRAMFraction) {
1464 1464 // Small physical memory, so use a minimum fraction of it for the heap
1465 1465 reasonable_max = phys_mem / MinRAMFraction;
1466 1466 } else {
1467 1467 // Not-small physical memory, so require a heap at least
1468 1468 // as large as MaxHeapSize
1469 1469 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1470 1470 }
1471 1471 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1472 1472 // Limit the heap size to ErgoHeapSizeLimit
1473 1473 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1474 1474 }
1475 1475 if (UseCompressedOops) {
1476 1476 // Limit the heap size to the maximum possible when using compressed oops
1477 1477 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1478 1478 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1479 1479 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1480 1480 // but it should be not less than default MaxHeapSize.
1481 1481 max_coop_heap -= HeapBaseMinAddress;
1482 1482 }
1483 1483 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1484 1484 }
1485 1485 reasonable_max = os::allocatable_physical_memory(reasonable_max);
1486 1486
1487 1487 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1488 1488 // An initial heap size was specified on the command line,
1489 1489 // so be sure that the maximum size is consistent. Done
1490 1490 // after call to allocatable_physical_memory because that
1491 1491 // method might reduce the allocation size.
1492 1492 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1493 1493 }
1494 1494
1495 1495 if (PrintGCDetails && Verbose) {
1496 1496 // Cannot use gclog_or_tty yet.
1497 1497 tty->print_cr(" Maximum heap size " SIZE_FORMAT, reasonable_max);
1498 1498 }
1499 1499 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx)reasonable_max);
1500 1500 }
1501 1501
1502 1502 // If the initial_heap_size has not been set with InitialHeapSize
1503 1503 // or -Xms, then set it as fraction of the size of physical memory,
1504 1504 // respecting the maximum and minimum sizes of the heap.
1505 1505 if (FLAG_IS_DEFAULT(InitialHeapSize)) {
1506 1506 julong reasonable_minimum = (julong)(OldSize + NewSize);
1507 1507
1508 1508 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1509 1509
1510 1510 reasonable_minimum = os::allocatable_physical_memory(reasonable_minimum);
1511 1511
1512 1512 julong reasonable_initial = phys_mem / InitialRAMFraction;
1513 1513
1514 1514 reasonable_initial = MAX2(reasonable_initial, reasonable_minimum);
1515 1515 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1516 1516
1517 1517 reasonable_initial = os::allocatable_physical_memory(reasonable_initial);
1518 1518
1519 1519 if (PrintGCDetails && Verbose) {
1520 1520 // Cannot use gclog_or_tty yet.
1521 1521 tty->print_cr(" Initial heap size " SIZE_FORMAT, (uintx)reasonable_initial);
1522 1522 tty->print_cr(" Minimum heap size " SIZE_FORMAT, (uintx)reasonable_minimum);
1523 1523 }
1524 1524 FLAG_SET_ERGO(uintx, InitialHeapSize, (uintx)reasonable_initial);
1525 1525 set_min_heap_size((uintx)reasonable_minimum);
1526 1526 }
1527 1527 }
1528 1528
1529 1529 // This must be called after ergonomics because we want bytecode rewriting
1530 1530 // if the server compiler is used, or if UseSharedSpaces is disabled.
1531 1531 void Arguments::set_bytecode_flags() {
1532 1532 // Better not attempt to store into a read-only space.
1533 1533 if (UseSharedSpaces) {
1534 1534 FLAG_SET_DEFAULT(RewriteBytecodes, false);
1535 1535 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
1536 1536 }
1537 1537
1538 1538 if (!RewriteBytecodes) {
1539 1539 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
1540 1540 }
1541 1541 }
1542 1542
1543 1543 // Aggressive optimization flags -XX:+AggressiveOpts
1544 1544 void Arguments::set_aggressive_opts_flags() {
1545 1545 #ifdef COMPILER2
1546 1546 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1547 1547 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1548 1548 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1549 1549 }
1550 1550 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1551 1551 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
1552 1552 }
1553 1553
1554 1554 // Feed the cache size setting into the JDK
1555 1555 char buffer[1024];
1556 1556 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
1557 1557 add_property(buffer);
1558 1558 }
1559 1559 if (AggressiveOpts && FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
1560 1560 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
1561 1561 }
1562 1562 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
1563 1563 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
1564 1564 }
1565 1565 if (AggressiveOpts && FLAG_IS_DEFAULT(OptimizeStringConcat)) {
1566 1566 FLAG_SET_DEFAULT(OptimizeStringConcat, true);
1567 1567 }
1568 1568 if (AggressiveOpts && FLAG_IS_DEFAULT(OptimizeFill)) {
1569 1569 FLAG_SET_DEFAULT(OptimizeFill, true);
1570 1570 }
1571 1571 #endif
1572 1572
1573 1573 if (AggressiveOpts) {
1574 1574 // Sample flag setting code
1575 1575 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
1576 1576 // FLAG_SET_DEFAULT(EliminateZeroing, true);
1577 1577 // }
1578 1578 }
1579 1579 }
1580 1580
1581 1581 //===========================================================================================================
1582 1582 // Parsing of java.compiler property
1583 1583
1584 1584 void Arguments::process_java_compiler_argument(char* arg) {
1585 1585 // For backwards compatibility, Djava.compiler=NONE or ""
1586 1586 // causes us to switch to -Xint mode UNLESS -Xdebug
1587 1587 // is also specified.
1588 1588 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
1589 1589 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
1590 1590 }
1591 1591 }
1592 1592
1593 1593 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
1594 1594 _sun_java_launcher = strdup(launcher);
1595 1595 if (strcmp("gamma", _sun_java_launcher) == 0) {
1596 1596 _created_by_gamma_launcher = true;
1597 1597 }
1598 1598 }
1599 1599
1600 1600 bool Arguments::created_by_java_launcher() {
1601 1601 assert(_sun_java_launcher != NULL, "property must have value");
1602 1602 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
1603 1603 }
1604 1604
1605 1605 bool Arguments::created_by_gamma_launcher() {
1606 1606 return _created_by_gamma_launcher;
1607 1607 }
1608 1608
1609 1609 //===========================================================================================================
1610 1610 // Parsing of main arguments
1611 1611
1612 1612 bool Arguments::verify_interval(uintx val, uintx min,
1613 1613 uintx max, const char* name) {
1614 1614 // Returns true iff value is in the inclusive interval [min..max]
1615 1615 // false, otherwise.
1616 1616 if (val >= min && val <= max) {
1617 1617 return true;
1618 1618 }
1619 1619 jio_fprintf(defaultStream::error_stream(),
1620 1620 "%s of " UINTX_FORMAT " is invalid; must be between " UINTX_FORMAT
1621 1621 " and " UINTX_FORMAT "\n",
1622 1622 name, val, min, max);
1623 1623 return false;
1624 1624 }
1625 1625
1626 1626 bool Arguments::verify_min_value(intx val, intx min, const char* name) {
1627 1627 // Returns true if given value is at least specified min threshold
1628 1628 // false, otherwise.
1629 1629 if (val >= min ) {
1630 1630 return true;
1631 1631 }
1632 1632 jio_fprintf(defaultStream::error_stream(),
1633 1633 "%s of " INTX_FORMAT " is invalid; must be at least " INTX_FORMAT "\n",
1634 1634 name, val, min);
1635 1635 return false;
1636 1636 }
1637 1637
1638 1638 bool Arguments::verify_percentage(uintx value, const char* name) {
1639 1639 if (value <= 100) {
1640 1640 return true;
1641 1641 }
1642 1642 jio_fprintf(defaultStream::error_stream(),
1643 1643 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n",
1644 1644 name, value);
1645 1645 return false;
1646 1646 }
1647 1647
1648 1648 static void force_serial_gc() {
1649 1649 FLAG_SET_DEFAULT(UseSerialGC, true);
1650 1650 FLAG_SET_DEFAULT(UseParNewGC, false);
1651 1651 FLAG_SET_DEFAULT(UseConcMarkSweepGC, false);
1652 1652 FLAG_SET_DEFAULT(CMSIncrementalMode, false); // special CMS suboption
1653 1653 FLAG_SET_DEFAULT(UseParallelGC, false);
1654 1654 FLAG_SET_DEFAULT(UseParallelOldGC, false);
1655 1655 FLAG_SET_DEFAULT(UseG1GC, false);
1656 1656 }
1657 1657
1658 1658 static bool verify_serial_gc_flags() {
1659 1659 return (UseSerialGC &&
1660 1660 !(UseParNewGC || (UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC ||
1661 1661 UseParallelGC || UseParallelOldGC));
1662 1662 }
1663 1663
1664 1664 // Check consistency of GC selection
1665 1665 bool Arguments::check_gc_consistency() {
1666 1666 bool status = true;
1667 1667 // Ensure that the user has not selected conflicting sets
1668 1668 // of collectors. [Note: this check is merely a user convenience;
1669 1669 // collectors over-ride each other so that only a non-conflicting
1670 1670 // set is selected; however what the user gets is not what they
1671 1671 // may have expected from the combination they asked for. It's
1672 1672 // better to reduce user confusion by not allowing them to
1673 1673 // select conflicting combinations.
1674 1674 uint i = 0;
1675 1675 if (UseSerialGC) i++;
1676 1676 if (UseConcMarkSweepGC || UseParNewGC) i++;
1677 1677 if (UseParallelGC || UseParallelOldGC) i++;
1678 1678 if (UseG1GC) i++;
1679 1679 if (i > 1) {
1680 1680 jio_fprintf(defaultStream::error_stream(),
1681 1681 "Conflicting collector combinations in option list; "
1682 1682 "please refer to the release notes for the combinations "
1683 1683 "allowed\n");
1684 1684 status = false;
1685 1685 }
1686 1686
1687 1687 return status;
1688 1688 }
1689 1689
1690 1690 // Check stack pages settings
1691 1691 bool Arguments::check_stack_pages()
1692 1692 {
1693 1693 bool status = true;
1694 1694 status = status && verify_min_value(StackYellowPages, 1, "StackYellowPages");
1695 1695 status = status && verify_min_value(StackRedPages, 1, "StackRedPages");
1696 1696 // greater stack shadow pages can't generate instruction to bang stack
1697 1697 status = status && verify_interval(StackShadowPages, 1, 50, "StackShadowPages");
1698 1698 return status;
1699 1699 }
1700 1700
1701 1701 // Check the consistency of vm_init_args
1702 1702 bool Arguments::check_vm_args_consistency() {
1703 1703 // Method for adding checks for flag consistency.
1704 1704 // The intent is to warn the user of all possible conflicts,
1705 1705 // before returning an error.
1706 1706 // Note: Needs platform-dependent factoring.
1707 1707 bool status = true;
1708 1708
1709 1709 #if ( (defined(COMPILER2) && defined(SPARC)))
1710 1710 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init
1711 1711 // on sparc doesn't require generation of a stub as is the case on, e.g.,
1712 1712 // x86. Normally, VM_Version_init must be called from init_globals in
1713 1713 // init.cpp, which is called by the initial java thread *after* arguments
1714 1714 // have been parsed. VM_Version_init gets called twice on sparc.
1715 1715 extern void VM_Version_init();
1716 1716 VM_Version_init();
1717 1717 if (!VM_Version::has_v9()) {
1718 1718 jio_fprintf(defaultStream::error_stream(),
1719 1719 "V8 Machine detected, Server requires V9\n");
1720 1720 status = false;
1721 1721 }
1722 1722 #endif /* COMPILER2 && SPARC */
1723 1723
1724 1724 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product
1725 1725 // builds so the cost of stack banging can be measured.
1726 1726 #if (defined(PRODUCT) && defined(SOLARIS))
1727 1727 if (!UseBoundThreads && !UseStackBanging) {
1728 1728 jio_fprintf(defaultStream::error_stream(),
1729 1729 "-UseStackBanging conflicts with -UseBoundThreads\n");
1730 1730
1731 1731 status = false;
1732 1732 }
1733 1733 #endif
1734 1734
1735 1735 if (TLABRefillWasteFraction == 0) {
1736 1736 jio_fprintf(defaultStream::error_stream(),
1737 1737 "TLABRefillWasteFraction should be a denominator, "
1738 1738 "not " SIZE_FORMAT "\n",
1739 1739 TLABRefillWasteFraction);
1740 1740 status = false;
1741 1741 }
1742 1742
1743 1743 status = status && verify_percentage(AdaptiveSizePolicyWeight,
1744 1744 "AdaptiveSizePolicyWeight");
1745 1745 status = status && verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight");
1746 1746 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance");
1747 1747 status = status && verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio");
1748 1748 status = status && verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio");
1749 1749
1750 1750 if (MinHeapFreeRatio > MaxHeapFreeRatio) {
1751 1751 jio_fprintf(defaultStream::error_stream(),
1752 1752 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or "
1753 1753 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n",
1754 1754 MinHeapFreeRatio, MaxHeapFreeRatio);
1755 1755 status = false;
1756 1756 }
1757 1757 // Keeping the heap 100% free is hard ;-) so limit it to 99%.
1758 1758 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99);
1759 1759
1760 1760 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
1761 1761 MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
1762 1762 }
1763 1763
1764 1764 if (UseParallelOldGC && ParallelOldGCSplitALot) {
1765 1765 // Settings to encourage splitting.
1766 1766 if (!FLAG_IS_CMDLINE(NewRatio)) {
1767 1767 FLAG_SET_CMDLINE(intx, NewRatio, 2);
1768 1768 }
1769 1769 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) {
1770 1770 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false);
1771 1771 }
1772 1772 }
1773 1773
1774 1774 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit");
1775 1775 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit");
1776 1776 if (GCTimeLimit == 100) {
1777 1777 // Turn off gc-overhead-limit-exceeded checks
1778 1778 FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
1779 1779 }
1780 1780
1781 1781 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit");
1782 1782
1783 1783 status = status && check_gc_consistency();
1784 1784 status = status && check_stack_pages();
1785 1785
1786 1786 if (_has_alloc_profile) {
1787 1787 if (UseParallelGC || UseParallelOldGC) {
1788 1788 jio_fprintf(defaultStream::error_stream(),
1789 1789 "error: invalid argument combination.\n"
1790 1790 "Allocation profiling (-Xaprof) cannot be used together with "
1791 1791 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n");
1792 1792 status = false;
1793 1793 }
1794 1794 if (UseConcMarkSweepGC) {
1795 1795 jio_fprintf(defaultStream::error_stream(),
1796 1796 "error: invalid argument combination.\n"
1797 1797 "Allocation profiling (-Xaprof) cannot be used together with "
1798 1798 "the CMS collector (-XX:+UseConcMarkSweepGC).\n");
1799 1799 status = false;
1800 1800 }
1801 1801 }
1802 1802
1803 1803 if (CMSIncrementalMode) {
1804 1804 if (!UseConcMarkSweepGC) {
1805 1805 jio_fprintf(defaultStream::error_stream(),
1806 1806 "error: invalid argument combination.\n"
1807 1807 "The CMS collector (-XX:+UseConcMarkSweepGC) must be "
1808 1808 "selected in order\nto use CMSIncrementalMode.\n");
1809 1809 status = false;
1810 1810 } else {
1811 1811 status = status && verify_percentage(CMSIncrementalDutyCycle,
1812 1812 "CMSIncrementalDutyCycle");
1813 1813 status = status && verify_percentage(CMSIncrementalDutyCycleMin,
1814 1814 "CMSIncrementalDutyCycleMin");
1815 1815 status = status && verify_percentage(CMSIncrementalSafetyFactor,
1816 1816 "CMSIncrementalSafetyFactor");
1817 1817 status = status && verify_percentage(CMSIncrementalOffset,
1818 1818 "CMSIncrementalOffset");
1819 1819 status = status && verify_percentage(CMSExpAvgFactor,
1820 1820 "CMSExpAvgFactor");
1821 1821 // If it was not set on the command line, set
1822 1822 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early.
1823 1823 if (CMSInitiatingOccupancyFraction < 0) {
1824 1824 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1);
1825 1825 }
1826 1826 }
1827 1827 }
1828 1828
1829 1829 // CMS space iteration, which FLSVerifyAllHeapreferences entails,
1830 1830 // insists that we hold the requisite locks so that the iteration is
1831 1831 // MT-safe. For the verification at start-up and shut-down, we don't
1832 1832 // yet have a good way of acquiring and releasing these locks,
1833 1833 // which are not visible at the CollectedHeap level. We want to
1834 1834 // be able to acquire these locks and then do the iteration rather
1835 1835 // than just disable the lock verification. This will be fixed under
1836 1836 // bug 4788986.
1837 1837 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
1838 1838 if (VerifyGCStartAt == 0) {
1839 1839 warning("Heap verification at start-up disabled "
1840 1840 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
1841 1841 VerifyGCStartAt = 1; // Disable verification at start-up
1842 1842 }
1843 1843 if (VerifyBeforeExit) {
1844 1844 warning("Heap verification at shutdown disabled "
1845 1845 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
1846 1846 VerifyBeforeExit = false; // Disable verification at shutdown
1847 1847 }
1848 1848 }
1849 1849
1850 1850 // Note: only executed in non-PRODUCT mode
1851 1851 if (!UseAsyncConcMarkSweepGC &&
1852 1852 (ExplicitGCInvokesConcurrent ||
1853 1853 ExplicitGCInvokesConcurrentAndUnloadsClasses)) {
1854 1854 jio_fprintf(defaultStream::error_stream(),
1855 1855 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts"
1856 1856 " with -UseAsyncConcMarkSweepGC");
1857 1857 status = false;
1858 1858 }
1859 1859
1860 1860 status = status && verify_min_value(ParGCArrayScanChunk, 1, "ParGCArrayScanChunk");
1861 1861
1862 1862 #ifndef SERIALGC
1863 1863 if (UseG1GC) {
1864 1864 status = status && verify_percentage(InitiatingHeapOccupancyPercent,
1865 1865 "InitiatingHeapOccupancyPercent");
1866 1866 status = status && verify_min_value(G1RefProcDrainInterval, 1,
1867 1867 "G1RefProcDrainInterval");
1868 1868 status = status && verify_min_value((intx)G1ConcMarkStepDurationMillis, 1,
1869 1869 "G1ConcMarkStepDurationMillis");
1870 1870 }
1871 1871 #endif
1872 1872
1873 1873 status = status && verify_interval(RefDiscoveryPolicy,
1874 1874 ReferenceProcessor::DiscoveryPolicyMin,
1875 1875 ReferenceProcessor::DiscoveryPolicyMax,
1876 1876 "RefDiscoveryPolicy");
1877 1877
1878 1878 // Limit the lower bound of this flag to 1 as it is used in a division
1879 1879 // expression.
1880 1880 status = status && verify_interval(TLABWasteTargetPercent,
1881 1881 1, 100, "TLABWasteTargetPercent");
1882 1882
1883 1883 status = status && verify_object_alignment();
1884 1884
1885 1885 return status;
1886 1886 }
1887 1887
1888 1888 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
1889 1889 const char* option_type) {
1890 1890 if (ignore) return false;
1891 1891
1892 1892 const char* spacer = " ";
1893 1893 if (option_type == NULL) {
1894 1894 option_type = ++spacer; // Set both to the empty string.
1895 1895 }
1896 1896
1897 1897 if (os::obsolete_option(option)) {
1898 1898 jio_fprintf(defaultStream::error_stream(),
1899 1899 "Obsolete %s%soption: %s\n", option_type, spacer,
1900 1900 option->optionString);
1901 1901 return false;
1902 1902 } else {
1903 1903 jio_fprintf(defaultStream::error_stream(),
1904 1904 "Unrecognized %s%soption: %s\n", option_type, spacer,
1905 1905 option->optionString);
1906 1906 return true;
1907 1907 }
1908 1908 }
1909 1909
1910 1910 static const char* user_assertion_options[] = {
1911 1911 "-da", "-ea", "-disableassertions", "-enableassertions", 0
1912 1912 };
1913 1913
1914 1914 static const char* system_assertion_options[] = {
1915 1915 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
1916 1916 };
1917 1917
1918 1918 // Return true if any of the strings in null-terminated array 'names' matches.
1919 1919 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
1920 1920 // the option must match exactly.
1921 1921 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
1922 1922 bool tail_allowed) {
1923 1923 for (/* empty */; *names != NULL; ++names) {
1924 1924 if (match_option(option, *names, tail)) {
1925 1925 if (**tail == '\0' || tail_allowed && **tail == ':') {
1926 1926 return true;
1927 1927 }
1928 1928 }
1929 1929 }
1930 1930 return false;
1931 1931 }
1932 1932
1933 1933 bool Arguments::parse_uintx(const char* value,
1934 1934 uintx* uintx_arg,
1935 1935 uintx min_size) {
1936 1936
1937 1937 // Check the sign first since atomull() parses only unsigned values.
1938 1938 bool value_is_positive = !(*value == '-');
1939 1939
1940 1940 if (value_is_positive) {
1941 1941 julong n;
1942 1942 bool good_return = atomull(value, &n);
1943 1943 if (good_return) {
1944 1944 bool above_minimum = n >= min_size;
1945 1945 bool value_is_too_large = n > max_uintx;
1946 1946
1947 1947 if (above_minimum && !value_is_too_large) {
1948 1948 *uintx_arg = n;
1949 1949 return true;
1950 1950 }
1951 1951 }
1952 1952 }
1953 1953 return false;
1954 1954 }
1955 1955
1956 1956 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
1957 1957 julong* long_arg,
1958 1958 julong min_size) {
1959 1959 if (!atomull(s, long_arg)) return arg_unreadable;
1960 1960 return check_memory_size(*long_arg, min_size);
1961 1961 }
1962 1962
1963 1963 // Parse JavaVMInitArgs structure
1964 1964
1965 1965 jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) {
1966 1966 // For components of the system classpath.
1967 1967 SysClassPath scp(Arguments::get_sysclasspath());
1968 1968 bool scp_assembly_required = false;
1969 1969
1970 1970 // Save default settings for some mode flags
1971 1971 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
1972 1972 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
1973 1973 Arguments::_ClipInlining = ClipInlining;
1974 1974 Arguments::_BackgroundCompilation = BackgroundCompilation;
1975 1975
1976 1976 // Parse JAVA_TOOL_OPTIONS environment variable (if present)
1977 1977 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required);
1978 1978 if (result != JNI_OK) {
1979 1979 return result;
1980 1980 }
1981 1981
1982 1982 // Parse JavaVMInitArgs structure passed in
1983 1983 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE);
1984 1984 if (result != JNI_OK) {
1985 1985 return result;
1986 1986 }
1987 1987
1988 1988 if (AggressiveOpts) {
1989 1989 // Insert alt-rt.jar between user-specified bootclasspath
1990 1990 // prefix and the default bootclasspath. os::set_boot_path()
1991 1991 // uses meta_index_dir as the default bootclasspath directory.
1992 1992 const char* altclasses_jar = "alt-rt.jar";
1993 1993 size_t altclasses_path_len = strlen(get_meta_index_dir()) + 1 +
1994 1994 strlen(altclasses_jar);
1995 1995 char* altclasses_path = NEW_C_HEAP_ARRAY(char, altclasses_path_len);
1996 1996 strcpy(altclasses_path, get_meta_index_dir());
1997 1997 strcat(altclasses_path, altclasses_jar);
1998 1998 scp.add_suffix_to_prefix(altclasses_path);
1999 1999 scp_assembly_required = true;
2000 2000 FREE_C_HEAP_ARRAY(char, altclasses_path);
2001 2001 }
2002 2002
2003 2003 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM)
2004 2004 result = parse_java_options_environment_variable(&scp, &scp_assembly_required);
2005 2005 if (result != JNI_OK) {
2006 2006 return result;
2007 2007 }
2008 2008
2009 2009 // Do final processing now that all arguments have been parsed
2010 2010 result = finalize_vm_init_args(&scp, scp_assembly_required);
2011 2011 if (result != JNI_OK) {
2012 2012 return result;
2013 2013 }
2014 2014
2015 2015 return JNI_OK;
2016 2016 }
2017 2017
2018 2018 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args,
2019 2019 SysClassPath* scp_p,
2020 2020 bool* scp_assembly_required_p,
2021 2021 FlagValueOrigin origin) {
2022 2022 // Remaining part of option string
2023 2023 const char* tail;
2024 2024
2025 2025 // iterate over arguments
2026 2026 for (int index = 0; index < args->nOptions; index++) {
2027 2027 bool is_absolute_path = false; // for -agentpath vs -agentlib
2028 2028
2029 2029 const JavaVMOption* option = args->options + index;
2030 2030
2031 2031 if (!match_option(option, "-Djava.class.path", &tail) &&
2032 2032 !match_option(option, "-Dsun.java.command", &tail) &&
2033 2033 !match_option(option, "-Dsun.java.launcher", &tail)) {
2034 2034
2035 2035 // add all jvm options to the jvm_args string. This string
2036 2036 // is used later to set the java.vm.args PerfData string constant.
2037 2037 // the -Djava.class.path and the -Dsun.java.command options are
2038 2038 // omitted from jvm_args string as each have their own PerfData
2039 2039 // string constant object.
2040 2040 build_jvm_args(option->optionString);
2041 2041 }
2042 2042
2043 2043 // -verbose:[class/gc/jni]
2044 2044 if (match_option(option, "-verbose", &tail)) {
2045 2045 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2046 2046 FLAG_SET_CMDLINE(bool, TraceClassLoading, true);
2047 2047 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true);
2048 2048 } else if (!strcmp(tail, ":gc")) {
2049 2049 FLAG_SET_CMDLINE(bool, PrintGC, true);
2050 2050 } else if (!strcmp(tail, ":jni")) {
2051 2051 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true);
2052 2052 }
2053 2053 // -da / -ea / -disableassertions / -enableassertions
2054 2054 // These accept an optional class/package name separated by a colon, e.g.,
2055 2055 // -da:java.lang.Thread.
2056 2056 } else if (match_option(option, user_assertion_options, &tail, true)) {
2057 2057 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2058 2058 if (*tail == '\0') {
2059 2059 JavaAssertions::setUserClassDefault(enable);
2060 2060 } else {
2061 2061 assert(*tail == ':', "bogus match by match_option()");
2062 2062 JavaAssertions::addOption(tail + 1, enable);
2063 2063 }
2064 2064 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2065 2065 } else if (match_option(option, system_assertion_options, &tail, false)) {
2066 2066 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2067 2067 JavaAssertions::setSystemClassDefault(enable);
2068 2068 // -bootclasspath:
2069 2069 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2070 2070 scp_p->reset_path(tail);
2071 2071 *scp_assembly_required_p = true;
2072 2072 // -bootclasspath/a:
2073 2073 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2074 2074 scp_p->add_suffix(tail);
2075 2075 *scp_assembly_required_p = true;
2076 2076 // -bootclasspath/p:
2077 2077 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2078 2078 scp_p->add_prefix(tail);
2079 2079 *scp_assembly_required_p = true;
2080 2080 // -Xrun
2081 2081 } else if (match_option(option, "-Xrun", &tail)) {
2082 2082 if (tail != NULL) {
2083 2083 const char* pos = strchr(tail, ':');
2084 2084 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2085 2085 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len);
2086 2086 name[len] = '\0';
2087 2087
2088 2088 char *options = NULL;
2089 2089 if(pos != NULL) {
2090 2090 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2091 2091 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2);
2092 2092 }
2093 2093 #ifdef JVMTI_KERNEL
2094 2094 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) {
2095 2095 warning("profiling and debugging agents are not supported with Kernel VM");
2096 2096 } else
2097 2097 #endif // JVMTI_KERNEL
2098 2098 add_init_library(name, options);
2099 2099 }
2100 2100 // -agentlib and -agentpath
2101 2101 } else if (match_option(option, "-agentlib:", &tail) ||
2102 2102 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2103 2103 if(tail != NULL) {
2104 2104 const char* pos = strchr(tail, '=');
2105 2105 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2106 2106 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len);
2107 2107 name[len] = '\0';
2108 2108
2109 2109 char *options = NULL;
2110 2110 if(pos != NULL) {
2111 2111 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1);
2112 2112 }
2113 2113 #ifdef JVMTI_KERNEL
2114 2114 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) {
2115 2115 warning("profiling and debugging agents are not supported with Kernel VM");
2116 2116 } else
2117 2117 #endif // JVMTI_KERNEL
2118 2118 add_init_agent(name, options, is_absolute_path);
2119 2119
2120 2120 }
2121 2121 // -javaagent
2122 2122 } else if (match_option(option, "-javaagent:", &tail)) {
2123 2123 if(tail != NULL) {
2124 2124 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail);
2125 2125 add_init_agent("instrument", options, false);
2126 2126 }
2127 2127 // -Xnoclassgc
2128 2128 } else if (match_option(option, "-Xnoclassgc", &tail)) {
2129 2129 FLAG_SET_CMDLINE(bool, ClassUnloading, false);
2130 2130 // -Xincgc: i-CMS
2131 2131 } else if (match_option(option, "-Xincgc", &tail)) {
2132 2132 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true);
2133 2133 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true);
2134 2134 // -Xnoincgc: no i-CMS
2135 2135 } else if (match_option(option, "-Xnoincgc", &tail)) {
2136 2136 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false);
2137 2137 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false);
2138 2138 // -Xconcgc
2139 2139 } else if (match_option(option, "-Xconcgc", &tail)) {
2140 2140 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true);
2141 2141 // -Xnoconcgc
2142 2142 } else if (match_option(option, "-Xnoconcgc", &tail)) {
2143 2143 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false);
2144 2144 // -Xbatch
2145 2145 } else if (match_option(option, "-Xbatch", &tail)) {
2146 2146 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false);
2147 2147 // -Xmn for compatibility with other JVM vendors
2148 2148 } else if (match_option(option, "-Xmn", &tail)) {
2149 2149 julong long_initial_eden_size = 0;
2150 2150 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1);
2151 2151 if (errcode != arg_in_range) {
2152 2152 jio_fprintf(defaultStream::error_stream(),
2153 2153 "Invalid initial eden size: %s\n", option->optionString);
2154 2154 describe_range_error(errcode);
2155 2155 return JNI_EINVAL;
2156 2156 }
2157 2157 FLAG_SET_CMDLINE(uintx, MaxNewSize, (uintx)long_initial_eden_size);
2158 2158 FLAG_SET_CMDLINE(uintx, NewSize, (uintx)long_initial_eden_size);
2159 2159 // -Xms
2160 2160 } else if (match_option(option, "-Xms", &tail)) {
2161 2161 julong long_initial_heap_size = 0;
2162 2162 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1);
2163 2163 if (errcode != arg_in_range) {
2164 2164 jio_fprintf(defaultStream::error_stream(),
2165 2165 "Invalid initial heap size: %s\n", option->optionString);
2166 2166 describe_range_error(errcode);
2167 2167 return JNI_EINVAL;
2168 2168 }
2169 2169 FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size);
2170 2170 // Currently the minimum size and the initial heap sizes are the same.
2171 2171 set_min_heap_size(InitialHeapSize);
2172 2172 // -Xmx
2173 2173 } else if (match_option(option, "-Xmx", &tail)) {
2174 2174 julong long_max_heap_size = 0;
2175 2175 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2176 2176 if (errcode != arg_in_range) {
2177 2177 jio_fprintf(defaultStream::error_stream(),
2178 2178 "Invalid maximum heap size: %s\n", option->optionString);
2179 2179 describe_range_error(errcode);
2180 2180 return JNI_EINVAL;
2181 2181 }
2182 2182 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (uintx)long_max_heap_size);
2183 2183 // Xmaxf
2184 2184 } else if (match_option(option, "-Xmaxf", &tail)) {
2185 2185 int maxf = (int)(atof(tail) * 100);
2186 2186 if (maxf < 0 || maxf > 100) {
2187 2187 jio_fprintf(defaultStream::error_stream(),
2188 2188 "Bad max heap free percentage size: %s\n",
2189 2189 option->optionString);
2190 2190 return JNI_EINVAL;
2191 2191 } else {
2192 2192 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf);
2193 2193 }
2194 2194 // Xminf
2195 2195 } else if (match_option(option, "-Xminf", &tail)) {
2196 2196 int minf = (int)(atof(tail) * 100);
2197 2197 if (minf < 0 || minf > 100) {
2198 2198 jio_fprintf(defaultStream::error_stream(),
2199 2199 "Bad min heap free percentage size: %s\n",
2200 2200 option->optionString);
2201 2201 return JNI_EINVAL;
2202 2202 } else {
2203 2203 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf);
2204 2204 }
2205 2205 // -Xss
2206 2206 } else if (match_option(option, "-Xss", &tail)) {
2207 2207 julong long_ThreadStackSize = 0;
2208 2208 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000);
2209 2209 if (errcode != arg_in_range) {
2210 2210 jio_fprintf(defaultStream::error_stream(),
2211 2211 "Invalid thread stack size: %s\n", option->optionString);
2212 2212 describe_range_error(errcode);
2213 2213 return JNI_EINVAL;
2214 2214 }
2215 2215 // Internally track ThreadStackSize in units of 1024 bytes.
2216 2216 FLAG_SET_CMDLINE(intx, ThreadStackSize,
2217 2217 round_to((int)long_ThreadStackSize, K) / K);
2218 2218 // -Xoss
2219 2219 } else if (match_option(option, "-Xoss", &tail)) {
2220 2220 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility
2221 2221 // -Xmaxjitcodesize
2222 2222 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2223 2223 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2224 2224 julong long_ReservedCodeCacheSize = 0;
2225 2225 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize,
2226 2226 (size_t)InitialCodeCacheSize);
2227 2227 if (errcode != arg_in_range) {
2228 2228 jio_fprintf(defaultStream::error_stream(),
2229 2229 "Invalid maximum code cache size: %s. Should be greater than InitialCodeCacheSize=%dK\n",
2230 2230 option->optionString, InitialCodeCacheSize/K);
2231 2231 describe_range_error(errcode);
2232 2232 return JNI_EINVAL;
2233 2233 }
2234 2234 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize);
2235 2235 // -green
2236 2236 } else if (match_option(option, "-green", &tail)) {
2237 2237 jio_fprintf(defaultStream::error_stream(),
2238 2238 "Green threads support not available\n");
2239 2239 return JNI_EINVAL;
2240 2240 // -native
2241 2241 } else if (match_option(option, "-native", &tail)) {
2242 2242 // HotSpot always uses native threads, ignore silently for compatibility
2243 2243 // -Xsqnopause
2244 2244 } else if (match_option(option, "-Xsqnopause", &tail)) {
2245 2245 // EVM option, ignore silently for compatibility
2246 2246 // -Xrs
2247 2247 } else if (match_option(option, "-Xrs", &tail)) {
2248 2248 // Classic/EVM option, new functionality
2249 2249 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true);
2250 2250 } else if (match_option(option, "-Xusealtsigs", &tail)) {
2251 2251 // change default internal VM signals used - lower case for back compat
2252 2252 FLAG_SET_CMDLINE(bool, UseAltSigs, true);
2253 2253 // -Xoptimize
2254 2254 } else if (match_option(option, "-Xoptimize", &tail)) {
2255 2255 // EVM option, ignore silently for compatibility
2256 2256 // -Xprof
2257 2257 } else if (match_option(option, "-Xprof", &tail)) {
2258 2258 #ifndef FPROF_KERNEL
2259 2259 _has_profile = true;
2260 2260 #else // FPROF_KERNEL
2261 2261 // do we have to exit?
2262 2262 warning("Kernel VM does not support flat profiling.");
2263 2263 #endif // FPROF_KERNEL
2264 2264 // -Xaprof
2265 2265 } else if (match_option(option, "-Xaprof", &tail)) {
2266 2266 _has_alloc_profile = true;
2267 2267 // -Xconcurrentio
2268 2268 } else if (match_option(option, "-Xconcurrentio", &tail)) {
2269 2269 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true);
2270 2270 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false);
2271 2271 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1);
2272 2272 FLAG_SET_CMDLINE(bool, UseTLAB, false);
2273 2273 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation
2274 2274
2275 2275 // -Xinternalversion
2276 2276 } else if (match_option(option, "-Xinternalversion", &tail)) {
2277 2277 jio_fprintf(defaultStream::output_stream(), "%s\n",
2278 2278 VM_Version::internal_vm_info_string());
2279 2279 vm_exit(0);
2280 2280 #ifndef PRODUCT
2281 2281 // -Xprintflags
2282 2282 } else if (match_option(option, "-Xprintflags", &tail)) {
2283 2283 CommandLineFlags::printFlags();
2284 2284 vm_exit(0);
2285 2285 #endif
2286 2286 // -D
2287 2287 } else if (match_option(option, "-D", &tail)) {
2288 2288 if (!add_property(tail)) {
2289 2289 return JNI_ENOMEM;
2290 2290 }
2291 2291 // Out of the box management support
2292 2292 if (match_option(option, "-Dcom.sun.management", &tail)) {
2293 2293 FLAG_SET_CMDLINE(bool, ManagementServer, true);
2294 2294 }
2295 2295 // -Xint
2296 2296 } else if (match_option(option, "-Xint", &tail)) {
2297 2297 set_mode_flags(_int);
2298 2298 // -Xmixed
2299 2299 } else if (match_option(option, "-Xmixed", &tail)) {
2300 2300 set_mode_flags(_mixed);
2301 2301 // -Xcomp
2302 2302 } else if (match_option(option, "-Xcomp", &tail)) {
2303 2303 // for testing the compiler; turn off all flags that inhibit compilation
2304 2304 set_mode_flags(_comp);
2305 2305
2306 2306 // -Xshare:dump
2307 2307 } else if (match_option(option, "-Xshare:dump", &tail)) {
2308 2308 #ifdef TIERED
2309 2309 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true);
2310 2310 set_mode_flags(_int); // Prevent compilation, which creates objects
2311 2311 #elif defined(COMPILER2)
2312 2312 vm_exit_during_initialization(
2313 2313 "Dumping a shared archive is not supported on the Server JVM.", NULL);
2314 2314 #elif defined(KERNEL)
2315 2315 vm_exit_during_initialization(
2316 2316 "Dumping a shared archive is not supported on the Kernel JVM.", NULL);
2317 2317 #else
2318 2318 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true);
2319 2319 set_mode_flags(_int); // Prevent compilation, which creates objects
2320 2320 #endif
2321 2321 // -Xshare:on
2322 2322 } else if (match_option(option, "-Xshare:on", &tail)) {
2323 2323 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true);
2324 2324 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true);
2325 2325 // -Xshare:auto
2326 2326 } else if (match_option(option, "-Xshare:auto", &tail)) {
2327 2327 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true);
2328 2328 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false);
2329 2329 // -Xshare:off
2330 2330 } else if (match_option(option, "-Xshare:off", &tail)) {
2331 2331 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false);
2332 2332 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false);
2333 2333
2334 2334 // -Xverify
2335 2335 } else if (match_option(option, "-Xverify", &tail)) {
2336 2336 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
2337 2337 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true);
2338 2338 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true);
2339 2339 } else if (strcmp(tail, ":remote") == 0) {
2340 2340 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false);
2341 2341 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true);
2342 2342 } else if (strcmp(tail, ":none") == 0) {
2343 2343 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false);
2344 2344 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false);
2345 2345 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
2346 2346 return JNI_EINVAL;
2347 2347 }
2348 2348 // -Xdebug
2349 2349 } else if (match_option(option, "-Xdebug", &tail)) {
2350 2350 // note this flag has been used, then ignore
2351 2351 set_xdebug_mode(true);
2352 2352 // -Xnoagent
2353 2353 } else if (match_option(option, "-Xnoagent", &tail)) {
2354 2354 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
2355 2355 } else if (match_option(option, "-Xboundthreads", &tail)) {
2356 2356 // Bind user level threads to kernel threads (Solaris only)
2357 2357 FLAG_SET_CMDLINE(bool, UseBoundThreads, true);
2358 2358 } else if (match_option(option, "-Xloggc:", &tail)) {
2359 2359 // Redirect GC output to the file. -Xloggc:<filename>
2360 2360 // ostream_init_log(), when called will use this filename
2361 2361 // to initialize a fileStream.
2362 2362 _gc_log_filename = strdup(tail);
2363 2363 FLAG_SET_CMDLINE(bool, PrintGC, true);
2364 2364 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true);
2365 2365 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true);
2366 2366
2367 2367 // JNI hooks
2368 2368 } else if (match_option(option, "-Xcheck", &tail)) {
2369 2369 if (!strcmp(tail, ":jni")) {
2370 2370 CheckJNICalls = true;
2371 2371 } else if (is_bad_option(option, args->ignoreUnrecognized,
2372 2372 "check")) {
2373 2373 return JNI_EINVAL;
2374 2374 }
2375 2375 } else if (match_option(option, "vfprintf", &tail)) {
2376 2376 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
2377 2377 } else if (match_option(option, "exit", &tail)) {
2378 2378 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
2379 2379 } else if (match_option(option, "abort", &tail)) {
2380 2380 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
2381 2381 // -XX:+AggressiveHeap
2382 2382 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) {
2383 2383
2384 2384 // This option inspects the machine and attempts to set various
2385 2385 // parameters to be optimal for long-running, memory allocation
2386 2386 // intensive jobs. It is intended for machines with large
2387 2387 // amounts of cpu and memory.
2388 2388
2389 2389 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
2390 2390 // VM, but we may not be able to represent the total physical memory
2391 2391 // available (like having 8gb of memory on a box but using a 32bit VM).
2392 2392 // Thus, we need to make sure we're using a julong for intermediate
2393 2393 // calculations.
2394 2394 julong initHeapSize;
2395 2395 julong total_memory = os::physical_memory();
2396 2396
2397 2397 if (total_memory < (julong)256*M) {
2398 2398 jio_fprintf(defaultStream::error_stream(),
2399 2399 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
2400 2400 vm_exit(1);
2401 2401 }
2402 2402
2403 2403 // The heap size is half of available memory, or (at most)
2404 2404 // all of possible memory less 160mb (leaving room for the OS
2405 2405 // when using ISM). This is the maximum; because adaptive sizing
2406 2406 // is turned on below, the actual space used may be smaller.
2407 2407
2408 2408 initHeapSize = MIN2(total_memory / (julong)2,
2409 2409 total_memory - (julong)160*M);
2410 2410
2411 2411 // Make sure that if we have a lot of memory we cap the 32 bit
2412 2412 // process space. The 64bit VM version of this function is a nop.
2413 2413 initHeapSize = os::allocatable_physical_memory(initHeapSize);
2414 2414
2415 2415 // The perm gen is separate but contiguous with the
2416 2416 // object heap (and is reserved with it) so subtract it
2417 2417 // from the heap size.
2418 2418 if (initHeapSize > MaxPermSize) {
2419 2419 initHeapSize = initHeapSize - MaxPermSize;
2420 2420 } else {
2421 2421 warning("AggressiveHeap and MaxPermSize values may conflict");
2422 2422 }
2423 2423
2424 2424 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2425 2425 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize);
2426 2426 FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize);
2427 2427 // Currently the minimum size and the initial heap sizes are the same.
2428 2428 set_min_heap_size(initHeapSize);
2429 2429 }
2430 2430 if (FLAG_IS_DEFAULT(NewSize)) {
2431 2431 // Make the young generation 3/8ths of the total heap.
2432 2432 FLAG_SET_CMDLINE(uintx, NewSize,
2433 2433 ((julong)MaxHeapSize / (julong)8) * (julong)3);
2434 2434 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize);
2435 2435 }
2436 2436
2437 2437 FLAG_SET_DEFAULT(UseLargePages, true);
2438 2438
2439 2439 // Increase some data structure sizes for efficiency
2440 2440 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize);
2441 2441 FLAG_SET_CMDLINE(bool, ResizeTLAB, false);
2442 2442 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K);
2443 2443
2444 2444 // See the OldPLABSize comment below, but replace 'after promotion'
2445 2445 // with 'after copying'. YoungPLABSize is the size of the survivor
2446 2446 // space per-gc-thread buffers. The default is 4kw.
2447 2447 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words
2448 2448
2449 2449 // OldPLABSize is the size of the buffers in the old gen that
2450 2450 // UseParallelGC uses to promote live data that doesn't fit in the
2451 2451 // survivor spaces. At any given time, there's one for each gc thread.
2452 2452 // The default size is 1kw. These buffers are rarely used, since the
2453 2453 // survivor spaces are usually big enough. For specjbb, however, there
2454 2454 // are occasions when there's lots of live data in the young gen
2455 2455 // and we end up promoting some of it. We don't have a definite
2456 2456 // explanation for why bumping OldPLABSize helps, but the theory
2457 2457 // is that a bigger PLAB results in retaining something like the
2458 2458 // original allocation order after promotion, which improves mutator
2459 2459 // locality. A minor effect may be that larger PLABs reduce the
2460 2460 // number of PLAB allocation events during gc. The value of 8kw
2461 2461 // was arrived at by experimenting with specjbb.
2462 2462 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words
2463 2463
2464 2464 // CompilationPolicyChoice=0 causes the server compiler to adopt
2465 2465 // a more conservative which-method-do-I-compile policy when one
2466 2466 // of the counters maintained by the interpreter trips. The
2467 2467 // result is reduced startup time and improved specjbb and
2468 2468 // alacrity performance. Zero is the default, but we set it
2469 2469 // explicitly here in case the default changes.
2470 2470 // See runtime/compilationPolicy.*.
2471 2471 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0);
2472 2472
2473 2473 // Enable parallel GC and adaptive generation sizing
2474 2474 FLAG_SET_CMDLINE(bool, UseParallelGC, true);
2475 2475 FLAG_SET_DEFAULT(ParallelGCThreads,
2476 2476 Abstract_VM_Version::parallel_worker_threads());
2477 2477
2478 2478 // Encourage steady state memory management
2479 2479 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100);
2480 2480
2481 2481 // This appears to improve mutator locality
2482 2482 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false);
2483 2483
2484 2484 // Get around early Solaris scheduling bug
2485 2485 // (affinity vs other jobs on system)
2486 2486 // but disallow DR and offlining (5008695).
2487 2487 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true);
2488 2488
2489 2489 } else if (match_option(option, "-XX:+NeverTenure", &tail)) {
2490 2490 // The last option must always win.
2491 2491 FLAG_SET_CMDLINE(bool, AlwaysTenure, false);
2492 2492 FLAG_SET_CMDLINE(bool, NeverTenure, true);
2493 2493 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) {
2494 2494 // The last option must always win.
2495 2495 FLAG_SET_CMDLINE(bool, NeverTenure, false);
2496 2496 FLAG_SET_CMDLINE(bool, AlwaysTenure, true);
2497 2497 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) ||
2498 2498 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) {
2499 2499 jio_fprintf(defaultStream::error_stream(),
2500 2500 "Please use CMSClassUnloadingEnabled in place of "
2501 2501 "CMSPermGenSweepingEnabled in the future\n");
2502 2502 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) {
2503 2503 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true);
2504 2504 jio_fprintf(defaultStream::error_stream(),
2505 2505 "Please use -XX:+UseGCOverheadLimit in place of "
2506 2506 "-XX:+UseGCTimeLimit in the future\n");
2507 2507 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) {
2508 2508 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false);
2509 2509 jio_fprintf(defaultStream::error_stream(),
2510 2510 "Please use -XX:-UseGCOverheadLimit in place of "
2511 2511 "-XX:-UseGCTimeLimit in the future\n");
2512 2512 // The TLE options are for compatibility with 1.3 and will be
2513 2513 // removed without notice in a future release. These options
2514 2514 // are not to be documented.
2515 2515 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) {
2516 2516 // No longer used.
2517 2517 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) {
2518 2518 FLAG_SET_CMDLINE(bool, ResizeTLAB, true);
2519 2519 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) {
2520 2520 FLAG_SET_CMDLINE(bool, ResizeTLAB, false);
2521 2521 } else if (match_option(option, "-XX:+PrintTLE", &tail)) {
2522 2522 FLAG_SET_CMDLINE(bool, PrintTLAB, true);
2523 2523 } else if (match_option(option, "-XX:-PrintTLE", &tail)) {
2524 2524 FLAG_SET_CMDLINE(bool, PrintTLAB, false);
2525 2525 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) {
2526 2526 // No longer used.
2527 2527 } else if (match_option(option, "-XX:TLESize=", &tail)) {
2528 2528 julong long_tlab_size = 0;
2529 2529 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1);
2530 2530 if (errcode != arg_in_range) {
2531 2531 jio_fprintf(defaultStream::error_stream(),
2532 2532 "Invalid TLAB size: %s\n", option->optionString);
2533 2533 describe_range_error(errcode);
2534 2534 return JNI_EINVAL;
2535 2535 }
2536 2536 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size);
2537 2537 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) {
2538 2538 // No longer used.
2539 2539 } else if (match_option(option, "-XX:+UseTLE", &tail)) {
2540 2540 FLAG_SET_CMDLINE(bool, UseTLAB, true);
2541 2541 } else if (match_option(option, "-XX:-UseTLE", &tail)) {
2542 2542 FLAG_SET_CMDLINE(bool, UseTLAB, false);
2543 2543 SOLARIS_ONLY(
2544 2544 } else if (match_option(option, "-XX:+UsePermISM", &tail)) {
2545 2545 warning("-XX:+UsePermISM is obsolete.");
2546 2546 FLAG_SET_CMDLINE(bool, UseISM, true);
2547 2547 } else if (match_option(option, "-XX:-UsePermISM", &tail)) {
2548 2548 FLAG_SET_CMDLINE(bool, UseISM, false);
2549 2549 )
2550 2550 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) {
2551 2551 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false);
2552 2552 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true);
2553 2553 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) {
2554 2554 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false);
2555 2555 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true);
2556 2556 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) {
2557 2557 #ifdef SOLARIS
2558 2558 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true);
2559 2559 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true);
2560 2560 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true);
2561 2561 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true);
2562 2562 #else // ndef SOLARIS
2563 2563 jio_fprintf(defaultStream::error_stream(),
2564 2564 "ExtendedDTraceProbes flag is only applicable on Solaris\n");
2565 2565 return JNI_EINVAL;
2566 2566 #endif // ndef SOLARIS
2567 2567 #ifdef ASSERT
2568 2568 } else if (match_option(option, "-XX:+FullGCALot", &tail)) {
2569 2569 FLAG_SET_CMDLINE(bool, FullGCALot, true);
2570 2570 // disable scavenge before parallel mark-compact
2571 2571 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false);
2572 2572 #endif
2573 2573 } else if (match_option(option, "-XX:CMSParPromoteBlocksToClaim=", &tail)) {
2574 2574 julong cms_blocks_to_claim = (julong)atol(tail);
2575 2575 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim);
2576 2576 jio_fprintf(defaultStream::error_stream(),
2577 2577 "Please use -XX:OldPLABSize in place of "
2578 2578 "-XX:CMSParPromoteBlocksToClaim in the future\n");
2579 2579 } else if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) {
2580 2580 julong cms_blocks_to_claim = (julong)atol(tail);
2581 2581 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim);
2582 2582 jio_fprintf(defaultStream::error_stream(),
2583 2583 "Please use -XX:OldPLABSize in place of "
2584 2584 "-XX:ParCMSPromoteBlocksToClaim in the future\n");
2585 2585 } else if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) {
2586 2586 julong old_plab_size = 0;
2587 2587 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1);
2588 2588 if (errcode != arg_in_range) {
2589 2589 jio_fprintf(defaultStream::error_stream(),
2590 2590 "Invalid old PLAB size: %s\n", option->optionString);
2591 2591 describe_range_error(errcode);
2592 2592 return JNI_EINVAL;
2593 2593 }
2594 2594 FLAG_SET_CMDLINE(uintx, OldPLABSize, old_plab_size);
2595 2595 jio_fprintf(defaultStream::error_stream(),
2596 2596 "Please use -XX:OldPLABSize in place of "
2597 2597 "-XX:ParallelGCOldGenAllocBufferSize in the future\n");
2598 2598 } else if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) {
2599 2599 julong young_plab_size = 0;
2600 2600 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1);
2601 2601 if (errcode != arg_in_range) {
2602 2602 jio_fprintf(defaultStream::error_stream(),
2603 2603 "Invalid young PLAB size: %s\n", option->optionString);
2604 2604 describe_range_error(errcode);
2605 2605 return JNI_EINVAL;
2606 2606 }
2607 2607 FLAG_SET_CMDLINE(uintx, YoungPLABSize, young_plab_size);
2608 2608 jio_fprintf(defaultStream::error_stream(),
2609 2609 "Please use -XX:YoungPLABSize in place of "
2610 2610 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n");
2611 2611 } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) ||
2612 2612 match_option(option, "-XX:G1MarkStackSize=", &tail)) {
2613 2613 julong stack_size = 0;
2614 2614 ArgsRange errcode = parse_memory_size(tail, &stack_size, 1);
2615 2615 if (errcode != arg_in_range) {
2616 2616 jio_fprintf(defaultStream::error_stream(),
2617 2617 "Invalid mark stack size: %s\n", option->optionString);
2618 2618 describe_range_error(errcode);
2619 2619 return JNI_EINVAL;
2620 2620 }
2621 2621 FLAG_SET_CMDLINE(uintx, MarkStackSize, stack_size);
2622 2622 } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) {
2623 2623 julong max_stack_size = 0;
2624 2624 ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1);
2625 2625 if (errcode != arg_in_range) {
2626 2626 jio_fprintf(defaultStream::error_stream(),
2627 2627 "Invalid maximum mark stack size: %s\n",
2628 2628 option->optionString);
2629 2629 describe_range_error(errcode);
2630 2630 return JNI_EINVAL;
2631 2631 }
2632 2632 FLAG_SET_CMDLINE(uintx, MarkStackSizeMax, max_stack_size);
2633 2633 } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) ||
2634 2634 match_option(option, "-XX:ParallelCMSThreads=", &tail)) {
2635 2635 uintx conc_threads = 0;
2636 2636 if (!parse_uintx(tail, &conc_threads, 1)) {
2637 2637 jio_fprintf(defaultStream::error_stream(),
2638 2638 "Invalid concurrent threads: %s\n", option->optionString);
2639 2639 return JNI_EINVAL;
2640 2640 }
2641 2641 FLAG_SET_CMDLINE(uintx, ConcGCThreads, conc_threads);
2642 2642 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
2643 2643 // Skip -XX:Flags= since that case has already been handled
2644 2644 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) {
2645 2645 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
2646 2646 return JNI_EINVAL;
2647 2647 }
2648 2648 }
2649 2649 // Unknown option
2650 2650 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
2651 2651 return JNI_ERR;
2652 2652 }
2653 2653 }
2654 2654 // Change the default value for flags which have different default values
2655 2655 // when working with older JDKs.
2656 2656 if (JDK_Version::current().compare_major(6) <= 0 &&
2657 2657 FLAG_IS_DEFAULT(UseVMInterruptibleIO)) {
2658 2658 FLAG_SET_DEFAULT(UseVMInterruptibleIO, true);
2659 2659 }
2660 2660 #ifdef LINUX
2661 2661 if (JDK_Version::current().compare_major(6) <= 0 &&
2662 2662 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
2663 2663 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
2664 2664 }
2665 2665 #endif // LINUX
2666 2666 return JNI_OK;
2667 2667 }
2668 2668
2669 2669 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) {
2670 2670 // This must be done after all -D arguments have been processed.
2671 2671 scp_p->expand_endorsed();
2672 2672
2673 2673 if (scp_assembly_required || scp_p->get_endorsed() != NULL) {
2674 2674 // Assemble the bootclasspath elements into the final path.
2675 2675 Arguments::set_sysclasspath(scp_p->combined_path());
2676 2676 }
2677 2677
2678 2678 // This must be done after all arguments have been processed.
2679 2679 // java_compiler() true means set to "NONE" or empty.
2680 2680 if (java_compiler() && !xdebug_mode()) {
2681 2681 // For backwards compatibility, we switch to interpreted mode if
2682 2682 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
2683 2683 // not specified.
2684 2684 set_mode_flags(_int);
2685 2685 }
2686 2686 if (CompileThreshold == 0) {
2687 2687 set_mode_flags(_int);
2688 2688 }
2689 2689
2690 2690 #ifndef COMPILER2
2691 2691 // Don't degrade server performance for footprint
2692 2692 if (FLAG_IS_DEFAULT(UseLargePages) &&
2693 2693 MaxHeapSize < LargePageHeapSizeThreshold) {
2694 2694 // No need for large granularity pages w/small heaps.
2695 2695 // Note that large pages are enabled/disabled for both the
2696 2696 // Java heap and the code cache.
2697 2697 FLAG_SET_DEFAULT(UseLargePages, false);
2698 2698 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false));
2699 2699 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false));
2700 2700 }
2701 2701
2702 2702 // Tiered compilation is undefined with C1.
2703 2703 TieredCompilation = false;
2704 2704 #else
2705 2705 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
2706 2706 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
2707 2707 }
2708 2708 #endif
2709 2709
2710 2710 // If we are running in a headless jre, force java.awt.headless property
2711 2711 // to be true unless the property has already been set.
2712 2712 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
2713 2713 if (os::is_headless_jre()) {
2714 2714 const char* headless = Arguments::get_property("java.awt.headless");
2715 2715 if (headless == NULL) {
2716 2716 char envbuffer[128];
2717 2717 if (!os::getenv("JAVA_AWT_HEADLESS", envbuffer, sizeof(envbuffer))) {
2718 2718 if (!add_property("java.awt.headless=true")) {
2719 2719 return JNI_ENOMEM;
2720 2720 }
2721 2721 } else {
2722 2722 char buffer[256];
2723 2723 strcpy(buffer, "java.awt.headless=");
2724 2724 strcat(buffer, envbuffer);
2725 2725 if (!add_property(buffer)) {
2726 2726 return JNI_ENOMEM;
2727 2727 }
2728 2728 }
2729 2729 }
2730 2730 }
2731 2731
2732 2732 if (!check_vm_args_consistency()) {
2733 2733 return JNI_ERR;
2734 2734 }
2735 2735
2736 2736 return JNI_OK;
2737 2737 }
2738 2738
2739 2739 jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) {
2740 2740 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p,
2741 2741 scp_assembly_required_p);
2742 2742 }
2743 2743
2744 2744 jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) {
2745 2745 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p,
2746 2746 scp_assembly_required_p);
2747 2747 }
2748 2748
2749 2749 jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) {
2750 2750 const int N_MAX_OPTIONS = 64;
2751 2751 const int OPTION_BUFFER_SIZE = 1024;
2752 2752 char buffer[OPTION_BUFFER_SIZE];
2753 2753
2754 2754 // The variable will be ignored if it exceeds the length of the buffer.
2755 2755 // Don't check this variable if user has special privileges
2756 2756 // (e.g. unix su command).
2757 2757 if (os::getenv(name, buffer, sizeof(buffer)) &&
2758 2758 !os::have_special_privileges()) {
2759 2759 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array
2760 2760 jio_fprintf(defaultStream::error_stream(),
2761 2761 "Picked up %s: %s\n", name, buffer);
2762 2762 char* rd = buffer; // pointer to the input string (rd)
2763 2763 int i;
2764 2764 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string
2765 2765 while (isspace(*rd)) rd++; // skip whitespace
2766 2766 if (*rd == 0) break; // we re done when the input string is read completely
2767 2767
2768 2768 // The output, option string, overwrites the input string.
2769 2769 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to
2770 2770 // input string (rd).
2771 2771 char* wrt = rd;
2772 2772
2773 2773 options[i++].optionString = wrt; // Fill in option
2774 2774 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL
2775 2775 if (*rd == '\'' || *rd == '"') { // handle a quoted string
2776 2776 int quote = *rd; // matching quote to look for
2777 2777 rd++; // don't copy open quote
2778 2778 while (*rd != quote) { // include everything (even spaces) up until quote
2779 2779 if (*rd == 0) { // string termination means unmatched string
2780 2780 jio_fprintf(defaultStream::error_stream(),
2781 2781 "Unmatched quote in %s\n", name);
2782 2782 return JNI_ERR;
2783 2783 }
2784 2784 *wrt++ = *rd++; // copy to option string
2785 2785 }
2786 2786 rd++; // don't copy close quote
2787 2787 } else {
2788 2788 *wrt++ = *rd++; // copy to option string
2789 2789 }
2790 2790 }
2791 2791 // Need to check if we're done before writing a NULL,
2792 2792 // because the write could be to the byte that rd is pointing to.
2793 2793 if (*rd++ == 0) {
2794 2794 *wrt = 0;
2795 2795 break;
2796 2796 }
2797 2797 *wrt = 0; // Zero terminate option
2798 2798 }
2799 2799 // Construct JavaVMInitArgs structure and parse as if it was part of the command line
2800 2800 JavaVMInitArgs vm_args;
2801 2801 vm_args.version = JNI_VERSION_1_2;
2802 2802 vm_args.options = options;
2803 2803 vm_args.nOptions = i;
2804 2804 vm_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
2805 2805
2806 2806 if (PrintVMOptions) {
2807 2807 const char* tail;
2808 2808 for (int i = 0; i < vm_args.nOptions; i++) {
2809 2809 const JavaVMOption *option = vm_args.options + i;
2810 2810 if (match_option(option, "-XX:", &tail)) {
2811 2811 logOption(tail);
2812 2812 }
2813 2813 }
2814 2814 }
2815 2815
2816 2816 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR));
2817 2817 }
2818 2818 return JNI_OK;
2819 2819 }
2820 2820
2821 2821 void Arguments::set_shared_spaces_flags() {
2822 2822 const bool must_share = DumpSharedSpaces || RequireSharedSpaces;
2823 2823 const bool might_share = must_share || UseSharedSpaces;
2824 2824
2825 2825 // The string table is part of the shared archive so the size must match.
2826 2826 if (!FLAG_IS_DEFAULT(StringTableSize)) {
2827 2827 // Disable sharing.
2828 2828 if (must_share) {
2829 2829 warning("disabling shared archive %s because of non-default "
2830 2830 "StringTableSize", DumpSharedSpaces ? "creation" : "use");
2831 2831 }
2832 2832 if (might_share) {
2833 2833 FLAG_SET_DEFAULT(DumpSharedSpaces, false);
2834 2834 FLAG_SET_DEFAULT(RequireSharedSpaces, false);
2835 2835 FLAG_SET_DEFAULT(UseSharedSpaces, false);
2836 2836 }
2837 2837 return;
2838 2838 }
2839 2839
2840 2840 // Check whether class data sharing settings conflict with GC, compressed oops
2841 2841 // or page size, and fix them up. Explicit sharing options override other
2842 2842 // settings.
2843 2843 const bool cannot_share = UseConcMarkSweepGC || CMSIncrementalMode ||
2844 2844 UseG1GC || UseParNewGC || UseParallelGC || UseParallelOldGC ||
2845 2845 UseCompressedOops || UseLargePages && FLAG_IS_CMDLINE(UseLargePages);
2846 2846 if (cannot_share) {
2847 2847 if (must_share) {
2848 2848 warning("selecting serial gc and disabling large pages %s"
2849 2849 "because of %s", "" LP64_ONLY("and compressed oops "),
2850 2850 DumpSharedSpaces ? "-Xshare:dump" : "-Xshare:on");
2851 2851 force_serial_gc();
2852 2852 FLAG_SET_CMDLINE(bool, UseLargePages, false);
2853 2853 LP64_ONLY(FLAG_SET_CMDLINE(bool, UseCompressedOops, false));
2854 2854 } else {
2855 2855 if (UseSharedSpaces && Verbose) {
2856 2856 warning("turning off use of shared archive because of "
2857 2857 "choice of garbage collector or large pages");
2858 2858 }
2859 2859 no_shared_spaces();
2860 2860 }
2861 2861 } else if (UseLargePages && might_share) {
2862 2862 // Disable large pages to allow shared spaces. This is sub-optimal, since
2863 2863 // there may not even be a shared archive to use.
2864 2864 FLAG_SET_DEFAULT(UseLargePages, false);
2865 2865 }
2866 2866 }
2867 2867
2868 2868 // Parse entry point called from JNI_CreateJavaVM
2869 2869
2870 2870 jint Arguments::parse(const JavaVMInitArgs* args) {
2871 2871
2872 2872 // Sharing support
2873 2873 // Construct the path to the archive
2874 2874 char jvm_path[JVM_MAXPATHLEN];
2875 2875 os::jvm_path(jvm_path, sizeof(jvm_path));
2876 2876 #ifdef TIERED
2877 2877 if (strstr(jvm_path, "client") != NULL) {
2878 2878 force_client_mode = true;
2879 2879 }
2880 2880 #endif // TIERED
2881 2881 char *end = strrchr(jvm_path, *os::file_separator());
2882 2882 if (end != NULL) *end = '\0';
2883 2883 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) +
2884 2884 strlen(os::file_separator()) + 20);
2885 2885 if (shared_archive_path == NULL) return JNI_ENOMEM;
2886 2886 strcpy(shared_archive_path, jvm_path);
2887 2887 strcat(shared_archive_path, os::file_separator());
2888 2888 strcat(shared_archive_path, "classes");
2889 2889 DEBUG_ONLY(strcat(shared_archive_path, "_g");)
2890 2890 strcat(shared_archive_path, ".jsa");
2891 2891 SharedArchivePath = shared_archive_path;
2892 2892
2893 2893 // Remaining part of option string
2894 2894 const char* tail;
2895 2895
2896 2896 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
2897 2897 bool settings_file_specified = false;
2898 2898 const char* flags_file;
2899 2899 int index;
2900 2900 for (index = 0; index < args->nOptions; index++) {
2901 2901 const JavaVMOption *option = args->options + index;
2902 2902 if (match_option(option, "-XX:Flags=", &tail)) {
2903 2903 flags_file = tail;
2904 2904 settings_file_specified = true;
2905 2905 }
2906 2906 if (match_option(option, "-XX:+PrintVMOptions", &tail)) {
2907 2907 PrintVMOptions = true;
2908 2908 }
2909 2909 if (match_option(option, "-XX:-PrintVMOptions", &tail)) {
2910 2910 PrintVMOptions = false;
2911 2911 }
2912 2912 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions", &tail)) {
2913 2913 IgnoreUnrecognizedVMOptions = true;
2914 2914 }
2915 2915 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions", &tail)) {
2916 2916 IgnoreUnrecognizedVMOptions = false;
2917 2917 }
2918 2918 if (match_option(option, "-XX:+PrintFlagsInitial", &tail)) {
2919 2919 CommandLineFlags::printFlags();
2920 2920 vm_exit(0);
2921 2921 }
2922 2922
2923 2923 #ifndef PRODUCT
2924 2924 if (match_option(option, "-XX:+PrintFlagsWithComments", &tail)) {
2925 2925 CommandLineFlags::printFlags(true);
2926 2926 vm_exit(0);
2927 2927 }
2928 2928 #endif
2929 2929 }
2930 2930
2931 2931 if (IgnoreUnrecognizedVMOptions) {
2932 2932 // uncast const to modify the flag args->ignoreUnrecognized
2933 2933 *(jboolean*)(&args->ignoreUnrecognized) = true;
2934 2934 }
2935 2935
2936 2936 // Parse specified settings file
2937 2937 if (settings_file_specified) {
2938 2938 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) {
2939 2939 return JNI_EINVAL;
2940 2940 }
2941 2941 }
2942 2942
2943 2943 // Parse default .hotspotrc settings file
2944 2944 if (!settings_file_specified) {
2945 2945 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) {
2946 2946 return JNI_EINVAL;
2947 2947 }
2948 2948 }
2949 2949
2950 2950 if (PrintVMOptions) {
2951 2951 for (index = 0; index < args->nOptions; index++) {
2952 2952 const JavaVMOption *option = args->options + index;
2953 2953 if (match_option(option, "-XX:", &tail)) {
2954 2954 logOption(tail);
2955 2955 }
2956 2956 }
2957 2957 }
2958 2958
2959 2959 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
2960 2960 jint result = parse_vm_init_args(args);
2961 2961 if (result != JNI_OK) {
2962 2962 return result;
2963 2963 }
2964 2964
2965 2965 #ifndef PRODUCT
2966 2966 if (TraceBytecodesAt != 0) {
|
↓ open down ↓ |
2966 lines elided |
↑ open up ↑ |
2967 2967 TraceBytecodes = true;
2968 2968 }
2969 2969 if (CountCompiledCalls) {
2970 2970 if (UseCounterDecay) {
2971 2971 warning("UseCounterDecay disabled because CountCalls is set");
2972 2972 UseCounterDecay = false;
2973 2973 }
2974 2974 }
2975 2975 #endif // PRODUCT
2976 2976
2977 - if (EnableInvokeDynamic && !EnableMethodHandles) {
2978 - if (!FLAG_IS_DEFAULT(EnableMethodHandles)) {
2979 - warning("forcing EnableMethodHandles true because EnableInvokeDynamic is true");
2977 + // Transitional
2978 + if (EnableMethodHandles || AnonymousClasses) {
2979 + if (!EnableInvokeDynamic && !FLAG_IS_DEFAULT(EnableInvokeDynamic)) {
2980 + warning("EnableMethodHandles and AnonymousClasses are obsolete. Keeping EnableInvokeDynamic disabled.");
2981 + } else {
2982 + EnableInvokeDynamic = true;
2980 2983 }
2981 - EnableMethodHandles = true;
2982 2984 }
2983 - if (EnableMethodHandles && !AnonymousClasses) {
2984 - if (!FLAG_IS_DEFAULT(AnonymousClasses)) {
2985 - warning("forcing AnonymousClasses true because EnableMethodHandles is true");
2985 +
2986 + // JSR 292 is not supported before 1.7
2987 + if (!JDK_Version::is_gte_jdk17x_version()) {
2988 + if (EnableInvokeDynamic) {
2989 + if (!FLAG_IS_DEFAULT(EnableInvokeDynamic)) {
2990 + warning("JSR 292 is not supported before 1.7. Disabling support.");
2991 + }
2992 + EnableInvokeDynamic = false;
2986 2993 }
2987 - AnonymousClasses = true;
2988 2994 }
2989 - if ((EnableMethodHandles || AnonymousClasses) && ScavengeRootsInCode == 0) {
2995 +
2996 + if (EnableInvokeDynamic && ScavengeRootsInCode == 0) {
2990 2997 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
2991 - warning("forcing ScavengeRootsInCode non-zero because EnableMethodHandles or AnonymousClasses is true");
2998 + warning("forcing ScavengeRootsInCode non-zero because EnableInvokeDynamic is true");
2992 2999 }
2993 3000 ScavengeRootsInCode = 1;
2994 3001 }
2995 3002 if (!JavaObjectsInPerm && ScavengeRootsInCode == 0) {
2996 3003 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
2997 3004 warning("forcing ScavengeRootsInCode non-zero because JavaObjectsInPerm is false");
2998 3005 }
2999 3006 ScavengeRootsInCode = 1;
3000 3007 }
3001 3008
3002 3009 if (PrintGCDetails) {
3003 3010 // Turn on -verbose:gc options as well
3004 3011 PrintGC = true;
3005 3012 }
3006 3013
3007 3014 // Set object alignment values.
3008 3015 set_object_alignment();
3009 3016
3010 3017 #ifdef SERIALGC
3011 3018 force_serial_gc();
3012 3019 #endif // SERIALGC
3013 3020 #ifdef KERNEL
3014 3021 no_shared_spaces();
3015 3022 #endif // KERNEL
3016 3023
3017 3024 // Set flags based on ergonomics.
3018 3025 set_ergonomics_flags();
3019 3026
3020 3027 set_shared_spaces_flags();
3021 3028
3022 3029 // Check the GC selections again.
3023 3030 if (!check_gc_consistency()) {
3024 3031 return JNI_EINVAL;
3025 3032 }
3026 3033
3027 3034 if (TieredCompilation) {
3028 3035 set_tiered_flags();
3029 3036 } else {
3030 3037 // Check if the policy is valid. Policies 0 and 1 are valid for non-tiered setup.
3031 3038 if (CompilationPolicyChoice >= 2) {
3032 3039 vm_exit_during_initialization(
3033 3040 "Incompatible compilation policy selected", NULL);
3034 3041 }
3035 3042 }
3036 3043
3037 3044 #ifndef KERNEL
3038 3045 // Set heap size based on available physical memory
3039 3046 set_heap_size();
3040 3047 // Set per-collector flags
3041 3048 if (UseParallelGC || UseParallelOldGC) {
3042 3049 set_parallel_gc_flags();
3043 3050 } else if (UseConcMarkSweepGC) { // should be done before ParNew check below
3044 3051 set_cms_and_parnew_gc_flags();
3045 3052 } else if (UseParNewGC) { // skipped if CMS is set above
3046 3053 set_parnew_gc_flags();
3047 3054 } else if (UseG1GC) {
3048 3055 set_g1_gc_flags();
3049 3056 }
3050 3057 #endif // KERNEL
3051 3058
3052 3059 #ifdef SERIALGC
3053 3060 assert(verify_serial_gc_flags(), "SerialGC unset");
3054 3061 #endif // SERIALGC
3055 3062
3056 3063 // Set bytecode rewriting flags
3057 3064 set_bytecode_flags();
3058 3065
3059 3066 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled.
3060 3067 set_aggressive_opts_flags();
3061 3068
3062 3069 // Turn off biased locking for locking debug mode flags,
3063 3070 // which are subtlely different from each other but neither works with
3064 3071 // biased locking.
3065 3072 if (UseHeavyMonitors
3066 3073 #ifdef COMPILER1
3067 3074 || !UseFastLocking
3068 3075 #endif // COMPILER1
3069 3076 ) {
3070 3077 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
3071 3078 // flag set to true on command line; warn the user that they
3072 3079 // can't enable biased locking here
3073 3080 warning("Biased Locking is not supported with locking debug flags"
3074 3081 "; ignoring UseBiasedLocking flag." );
3075 3082 }
3076 3083 UseBiasedLocking = false;
3077 3084 }
3078 3085
3079 3086 #ifdef CC_INTERP
3080 3087 // Clear flags not supported by the C++ interpreter
3081 3088 FLAG_SET_DEFAULT(ProfileInterpreter, false);
3082 3089 FLAG_SET_DEFAULT(UseBiasedLocking, false);
3083 3090 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
3084 3091 #endif // CC_INTERP
3085 3092
3086 3093 #ifdef COMPILER2
3087 3094 if (!UseBiasedLocking || EmitSync != 0) {
3088 3095 UseOptoBiasInlining = false;
3089 3096 }
3090 3097 #endif
3091 3098
3092 3099 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
3093 3100 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
3094 3101 DebugNonSafepoints = true;
3095 3102 }
3096 3103
3097 3104 #ifndef PRODUCT
3098 3105 if (CompileTheWorld) {
3099 3106 // Force NmethodSweeper to sweep whole CodeCache each time.
3100 3107 if (FLAG_IS_DEFAULT(NmethodSweepFraction)) {
3101 3108 NmethodSweepFraction = 1;
3102 3109 }
3103 3110 }
3104 3111 #endif
3105 3112
3106 3113 if (PrintCommandLineFlags) {
3107 3114 CommandLineFlags::printSetFlags();
3108 3115 }
3109 3116
3110 3117 // Apply CPU specific policy for the BiasedLocking
3111 3118 if (UseBiasedLocking) {
3112 3119 if (!VM_Version::use_biased_locking() &&
3113 3120 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
3114 3121 UseBiasedLocking = false;
3115 3122 }
3116 3123 }
3117 3124
3118 3125 // set PauseAtExit if the gamma launcher was used and a debugger is attached
3119 3126 // but only if not already set on the commandline
3120 3127 if (Arguments::created_by_gamma_launcher() && os::is_debugger_attached()) {
3121 3128 bool set = false;
3122 3129 CommandLineFlags::wasSetOnCmdline("PauseAtExit", &set);
3123 3130 if (!set) {
3124 3131 FLAG_SET_DEFAULT(PauseAtExit, true);
3125 3132 }
3126 3133 }
3127 3134
3128 3135 return JNI_OK;
3129 3136 }
3130 3137
3131 3138 int Arguments::PropertyList_count(SystemProperty* pl) {
3132 3139 int count = 0;
3133 3140 while(pl != NULL) {
3134 3141 count++;
3135 3142 pl = pl->next();
3136 3143 }
3137 3144 return count;
3138 3145 }
3139 3146
3140 3147 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
3141 3148 assert(key != NULL, "just checking");
3142 3149 SystemProperty* prop;
3143 3150 for (prop = pl; prop != NULL; prop = prop->next()) {
3144 3151 if (strcmp(key, prop->key()) == 0) return prop->value();
3145 3152 }
3146 3153 return NULL;
3147 3154 }
3148 3155
3149 3156 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
3150 3157 int count = 0;
3151 3158 const char* ret_val = NULL;
3152 3159
3153 3160 while(pl != NULL) {
3154 3161 if(count >= index) {
3155 3162 ret_val = pl->key();
3156 3163 break;
3157 3164 }
3158 3165 count++;
3159 3166 pl = pl->next();
3160 3167 }
3161 3168
3162 3169 return ret_val;
3163 3170 }
3164 3171
3165 3172 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
3166 3173 int count = 0;
3167 3174 char* ret_val = NULL;
3168 3175
3169 3176 while(pl != NULL) {
3170 3177 if(count >= index) {
3171 3178 ret_val = pl->value();
3172 3179 break;
3173 3180 }
3174 3181 count++;
3175 3182 pl = pl->next();
3176 3183 }
3177 3184
3178 3185 return ret_val;
3179 3186 }
3180 3187
3181 3188 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
3182 3189 SystemProperty* p = *plist;
3183 3190 if (p == NULL) {
3184 3191 *plist = new_p;
3185 3192 } else {
3186 3193 while (p->next() != NULL) {
3187 3194 p = p->next();
3188 3195 }
3189 3196 p->set_next(new_p);
3190 3197 }
3191 3198 }
3192 3199
3193 3200 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) {
3194 3201 if (plist == NULL)
3195 3202 return;
3196 3203
3197 3204 SystemProperty* new_p = new SystemProperty(k, v, true);
3198 3205 PropertyList_add(plist, new_p);
3199 3206 }
3200 3207
3201 3208 // This add maintains unique property key in the list.
3202 3209 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append) {
3203 3210 if (plist == NULL)
3204 3211 return;
3205 3212
3206 3213 // If property key exist then update with new value.
3207 3214 SystemProperty* prop;
3208 3215 for (prop = *plist; prop != NULL; prop = prop->next()) {
3209 3216 if (strcmp(k, prop->key()) == 0) {
3210 3217 if (append) {
3211 3218 prop->append_value(v);
3212 3219 } else {
3213 3220 prop->set_value(v);
3214 3221 }
3215 3222 return;
3216 3223 }
3217 3224 }
3218 3225
3219 3226 PropertyList_add(plist, k, v);
3220 3227 }
3221 3228
3222 3229 #ifdef KERNEL
3223 3230 char *Arguments::get_kernel_properties() {
3224 3231 // Find properties starting with kernel and append them to string
3225 3232 // We need to find out how long they are first because the URL's that they
3226 3233 // might point to could get long.
3227 3234 int length = 0;
3228 3235 SystemProperty* prop;
3229 3236 for (prop = _system_properties; prop != NULL; prop = prop->next()) {
3230 3237 if (strncmp(prop->key(), "kernel.", 7 ) == 0) {
3231 3238 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D ="
3232 3239 }
3233 3240 }
3234 3241 // Add one for null terminator.
3235 3242 char *props = AllocateHeap(length + 1, "get_kernel_properties");
3236 3243 if (length != 0) {
3237 3244 int pos = 0;
3238 3245 for (prop = _system_properties; prop != NULL; prop = prop->next()) {
3239 3246 if (strncmp(prop->key(), "kernel.", 7 ) == 0) {
3240 3247 jio_snprintf(&props[pos], length-pos,
3241 3248 "-D%s=%s ", prop->key(), prop->value());
3242 3249 pos = strlen(props);
3243 3250 }
3244 3251 }
3245 3252 }
3246 3253 // null terminate props in case of null
3247 3254 props[length] = '\0';
3248 3255 return props;
3249 3256 }
3250 3257 #endif // KERNEL
3251 3258
3252 3259 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
3253 3260 // Returns true if all of the source pointed by src has been copied over to
3254 3261 // the destination buffer pointed by buf. Otherwise, returns false.
3255 3262 // Notes:
3256 3263 // 1. If the length (buflen) of the destination buffer excluding the
3257 3264 // NULL terminator character is not long enough for holding the expanded
3258 3265 // pid characters, it also returns false instead of returning the partially
3259 3266 // expanded one.
3260 3267 // 2. The passed in "buflen" should be large enough to hold the null terminator.
3261 3268 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
3262 3269 char* buf, size_t buflen) {
3263 3270 const char* p = src;
3264 3271 char* b = buf;
3265 3272 const char* src_end = &src[srclen];
3266 3273 char* buf_end = &buf[buflen - 1];
3267 3274
3268 3275 while (p < src_end && b < buf_end) {
3269 3276 if (*p == '%') {
3270 3277 switch (*(++p)) {
3271 3278 case '%': // "%%" ==> "%"
3272 3279 *b++ = *p++;
3273 3280 break;
3274 3281 case 'p': { // "%p" ==> current process id
3275 3282 // buf_end points to the character before the last character so
3276 3283 // that we could write '\0' to the end of the buffer.
3277 3284 size_t buf_sz = buf_end - b + 1;
3278 3285 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
3279 3286
3280 3287 // if jio_snprintf fails or the buffer is not long enough to hold
3281 3288 // the expanded pid, returns false.
3282 3289 if (ret < 0 || ret >= (int)buf_sz) {
3283 3290 return false;
3284 3291 } else {
3285 3292 b += ret;
3286 3293 assert(*b == '\0', "fail in copy_expand_pid");
3287 3294 if (p == src_end && b == buf_end + 1) {
3288 3295 // reach the end of the buffer.
3289 3296 return true;
3290 3297 }
3291 3298 }
3292 3299 p++;
3293 3300 break;
3294 3301 }
3295 3302 default :
3296 3303 *b++ = '%';
3297 3304 }
3298 3305 } else {
3299 3306 *b++ = *p++;
3300 3307 }
3301 3308 }
3302 3309 *b = '\0';
3303 3310 return (p == src_end); // return false if not all of the source was copied
3304 3311 }
|
↓ open down ↓ |
303 lines elided |
↑ open up ↑ |
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX