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--- old/src/share/vm/runtime/arguments.cpp
+++ new/src/share/vm/runtime/arguments.cpp
1 1 /*
2 2 * Copyright (c) 1997, 2014, 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/classLoader.hpp"
27 27 #include "classfile/javaAssertions.hpp"
28 28 #include "classfile/symbolTable.hpp"
29 29 #include "compiler/compilerOracle.hpp"
30 30 #include "memory/allocation.inline.hpp"
31 31 #include "memory/cardTableRS.hpp"
32 32 #include "memory/genCollectedHeap.hpp"
33 33 #include "memory/referenceProcessor.hpp"
34 34 #include "memory/universe.inline.hpp"
35 35 #include "oops/oop.inline.hpp"
36 36 #include "prims/jvmtiExport.hpp"
37 37 #include "runtime/arguments.hpp"
38 38 #include "runtime/arguments_ext.hpp"
39 39 #include "runtime/globals_extension.hpp"
40 40 #include "runtime/java.hpp"
41 41 #include "services/management.hpp"
42 42 #include "services/memTracker.hpp"
43 43 #include "utilities/defaultStream.hpp"
44 44 #include "utilities/macros.hpp"
45 45 #include "utilities/stringUtils.hpp"
46 46 #include "utilities/taskqueue.hpp"
47 47 #ifdef TARGET_OS_FAMILY_linux
48 48 # include "os_linux.inline.hpp"
49 49 #endif
50 50 #ifdef TARGET_OS_FAMILY_solaris
51 51 # include "os_solaris.inline.hpp"
52 52 #endif
53 53 #ifdef TARGET_OS_FAMILY_windows
54 54 # include "os_windows.inline.hpp"
55 55 #endif
56 56 #ifdef TARGET_OS_FAMILY_aix
57 57 # include "os_aix.inline.hpp"
58 58 #endif
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59 59 #ifdef TARGET_OS_FAMILY_bsd
60 60 # include "os_bsd.inline.hpp"
61 61 #endif
62 62 #if INCLUDE_ALL_GCS
63 63 #include "gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp"
64 64 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
65 65 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
66 66 #endif // INCLUDE_ALL_GCS
67 67
68 68 // Note: This is a special bug reporting site for the JVM
69 -#define DEFAULT_VENDOR_URL_BUG "http://bugreport.sun.com/bugreport/crash.jsp"
69 +#define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
70 70 #define DEFAULT_JAVA_LAUNCHER "generic"
71 71
72 72 // Disable options not supported in this release, with a warning if they
73 73 // were explicitly requested on the command-line
74 74 #define UNSUPPORTED_OPTION(opt, description) \
75 75 do { \
76 76 if (opt) { \
77 77 if (FLAG_IS_CMDLINE(opt)) { \
78 78 warning(description " is disabled in this release."); \
79 79 } \
80 80 FLAG_SET_DEFAULT(opt, false); \
81 81 } \
82 82 } while(0)
83 83
84 84 #define UNSUPPORTED_GC_OPTION(gc) \
85 85 do { \
86 86 if (gc) { \
87 87 if (FLAG_IS_CMDLINE(gc)) { \
88 88 warning(#gc " is not supported in this VM. Using Serial GC."); \
89 89 } \
90 90 FLAG_SET_DEFAULT(gc, false); \
91 91 } \
92 92 } while(0)
93 93
94 94 char** Arguments::_jvm_flags_array = NULL;
95 95 int Arguments::_num_jvm_flags = 0;
96 96 char** Arguments::_jvm_args_array = NULL;
97 97 int Arguments::_num_jvm_args = 0;
98 98 char* Arguments::_java_command = NULL;
99 99 SystemProperty* Arguments::_system_properties = NULL;
100 100 const char* Arguments::_gc_log_filename = NULL;
101 101 bool Arguments::_has_profile = false;
102 102 size_t Arguments::_conservative_max_heap_alignment = 0;
103 103 uintx Arguments::_min_heap_size = 0;
104 104 uintx Arguments::_min_heap_free_ratio = 0;
105 105 uintx Arguments::_max_heap_free_ratio = 0;
106 106 Arguments::Mode Arguments::_mode = _mixed;
107 107 bool Arguments::_java_compiler = false;
108 108 bool Arguments::_xdebug_mode = false;
109 109 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
110 110 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
111 111 int Arguments::_sun_java_launcher_pid = -1;
112 112 bool Arguments::_created_by_gamma_launcher = false;
113 113
114 114 // These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*)
115 115 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
116 116 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
117 117 bool Arguments::_BackgroundCompilation = BackgroundCompilation;
118 118 bool Arguments::_ClipInlining = ClipInlining;
119 119
120 120 char* Arguments::SharedArchivePath = NULL;
121 121
122 122 AgentLibraryList Arguments::_libraryList;
123 123 AgentLibraryList Arguments::_agentList;
124 124
125 125 abort_hook_t Arguments::_abort_hook = NULL;
126 126 exit_hook_t Arguments::_exit_hook = NULL;
127 127 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
128 128
129 129
130 130 SystemProperty *Arguments::_java_ext_dirs = NULL;
131 131 SystemProperty *Arguments::_java_endorsed_dirs = NULL;
132 132 SystemProperty *Arguments::_sun_boot_library_path = NULL;
133 133 SystemProperty *Arguments::_java_library_path = NULL;
134 134 SystemProperty *Arguments::_java_home = NULL;
135 135 SystemProperty *Arguments::_java_class_path = NULL;
136 136 SystemProperty *Arguments::_sun_boot_class_path = NULL;
137 137
138 138 char* Arguments::_meta_index_path = NULL;
139 139 char* Arguments::_meta_index_dir = NULL;
140 140
141 141 // Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string
142 142
143 143 static bool match_option(const JavaVMOption *option, const char* name,
144 144 const char** tail) {
145 145 int len = (int)strlen(name);
146 146 if (strncmp(option->optionString, name, len) == 0) {
147 147 *tail = option->optionString + len;
148 148 return true;
149 149 } else {
150 150 return false;
151 151 }
152 152 }
153 153
154 154 static void logOption(const char* opt) {
155 155 if (PrintVMOptions) {
156 156 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
157 157 }
158 158 }
159 159
160 160 // Process java launcher properties.
161 161 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
162 162 // See if sun.java.launcher or sun.java.launcher.pid is defined.
163 163 // Must do this before setting up other system properties,
164 164 // as some of them may depend on launcher type.
165 165 for (int index = 0; index < args->nOptions; index++) {
166 166 const JavaVMOption* option = args->options + index;
167 167 const char* tail;
168 168
169 169 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
170 170 process_java_launcher_argument(tail, option->extraInfo);
171 171 continue;
172 172 }
173 173 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
174 174 _sun_java_launcher_pid = atoi(tail);
175 175 continue;
176 176 }
177 177 }
178 178 }
179 179
180 180 // Initialize system properties key and value.
181 181 void Arguments::init_system_properties() {
182 182
183 183 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
184 184 "Java Virtual Machine Specification", false));
185 185 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
186 186 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
187 187 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true));
188 188
189 189 // following are JVMTI agent writeable properties.
190 190 // Properties values are set to NULL and they are
191 191 // os specific they are initialized in os::init_system_properties_values().
192 192 _java_ext_dirs = new SystemProperty("java.ext.dirs", NULL, true);
193 193 _java_endorsed_dirs = new SystemProperty("java.endorsed.dirs", NULL, true);
194 194 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
195 195 _java_library_path = new SystemProperty("java.library.path", NULL, true);
196 196 _java_home = new SystemProperty("java.home", NULL, true);
197 197 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true);
198 198
199 199 _java_class_path = new SystemProperty("java.class.path", "", true);
200 200
201 201 // Add to System Property list.
202 202 PropertyList_add(&_system_properties, _java_ext_dirs);
203 203 PropertyList_add(&_system_properties, _java_endorsed_dirs);
204 204 PropertyList_add(&_system_properties, _sun_boot_library_path);
205 205 PropertyList_add(&_system_properties, _java_library_path);
206 206 PropertyList_add(&_system_properties, _java_home);
207 207 PropertyList_add(&_system_properties, _java_class_path);
208 208 PropertyList_add(&_system_properties, _sun_boot_class_path);
209 209
210 210 // Set OS specific system properties values
211 211 os::init_system_properties_values();
212 212 }
213 213
214 214
215 215 // Update/Initialize System properties after JDK version number is known
216 216 void Arguments::init_version_specific_system_properties() {
217 217 enum { bufsz = 16 };
218 218 char buffer[bufsz];
219 219 const char* spec_vendor = "Sun Microsystems Inc.";
220 220 uint32_t spec_version = 0;
221 221
222 222 if (JDK_Version::is_gte_jdk17x_version()) {
223 223 spec_vendor = "Oracle Corporation";
224 224 spec_version = JDK_Version::current().major_version();
225 225 }
226 226 jio_snprintf(buffer, bufsz, "1." UINT32_FORMAT, spec_version);
227 227
228 228 PropertyList_add(&_system_properties,
229 229 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
230 230 PropertyList_add(&_system_properties,
231 231 new SystemProperty("java.vm.specification.version", buffer, false));
232 232 PropertyList_add(&_system_properties,
233 233 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
234 234 }
235 235
236 236 /**
237 237 * Provide a slightly more user-friendly way of eliminating -XX flags.
238 238 * When a flag is eliminated, it can be added to this list in order to
239 239 * continue accepting this flag on the command-line, while issuing a warning
240 240 * and ignoring the value. Once the JDK version reaches the 'accept_until'
241 241 * limit, we flatly refuse to admit the existence of the flag. This allows
242 242 * a flag to die correctly over JDK releases using HSX.
243 243 */
244 244 typedef struct {
245 245 const char* name;
246 246 JDK_Version obsoleted_in; // when the flag went away
247 247 JDK_Version accept_until; // which version to start denying the existence
248 248 } ObsoleteFlag;
249 249
250 250 static ObsoleteFlag obsolete_jvm_flags[] = {
251 251 { "UseTrainGC", JDK_Version::jdk(5), JDK_Version::jdk(7) },
252 252 { "UseSpecialLargeObjectHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) },
253 253 { "UseOversizedCarHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) },
254 254 { "TraceCarAllocation", JDK_Version::jdk(5), JDK_Version::jdk(7) },
255 255 { "PrintTrainGCProcessingStats", JDK_Version::jdk(5), JDK_Version::jdk(7) },
256 256 { "LogOfCarSpaceSize", JDK_Version::jdk(5), JDK_Version::jdk(7) },
257 257 { "OversizedCarThreshold", JDK_Version::jdk(5), JDK_Version::jdk(7) },
258 258 { "MinTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) },
259 259 { "DefaultTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) },
260 260 { "MaxTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) },
261 261 { "DelayTickAdjustment", JDK_Version::jdk(5), JDK_Version::jdk(7) },
262 262 { "ProcessingToTenuringRatio", JDK_Version::jdk(5), JDK_Version::jdk(7) },
263 263 { "MinTrainLength", JDK_Version::jdk(5), JDK_Version::jdk(7) },
264 264 { "AppendRatio", JDK_Version::jdk_update(6,10), JDK_Version::jdk(7) },
265 265 { "DefaultMaxRAM", JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) },
266 266 { "DefaultInitialRAMFraction",
267 267 JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) },
268 268 { "UseDepthFirstScavengeOrder",
269 269 JDK_Version::jdk_update(6,22), JDK_Version::jdk(7) },
270 270 { "HandlePromotionFailure",
271 271 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) },
272 272 { "MaxLiveObjectEvacuationRatio",
273 273 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) },
274 274 { "ForceSharedSpaces", JDK_Version::jdk_update(6,25), JDK_Version::jdk(8) },
275 275 { "UseParallelOldGCCompacting",
276 276 JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) },
277 277 { "UseParallelDensePrefixUpdate",
278 278 JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) },
279 279 { "UseParallelOldGCDensePrefix",
280 280 JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) },
281 281 { "AllowTransitionalJSR292", JDK_Version::jdk(7), JDK_Version::jdk(8) },
282 282 { "UseCompressedStrings", JDK_Version::jdk(7), JDK_Version::jdk(8) },
283 283 { "CMSPermGenPrecleaningEnabled", JDK_Version::jdk(8), JDK_Version::jdk(9) },
284 284 { "CMSTriggerPermRatio", JDK_Version::jdk(8), JDK_Version::jdk(9) },
285 285 { "CMSInitiatingPermOccupancyFraction", JDK_Version::jdk(8), JDK_Version::jdk(9) },
286 286 { "AdaptivePermSizeWeight", JDK_Version::jdk(8), JDK_Version::jdk(9) },
287 287 { "PermGenPadding", JDK_Version::jdk(8), JDK_Version::jdk(9) },
288 288 { "PermMarkSweepDeadRatio", JDK_Version::jdk(8), JDK_Version::jdk(9) },
289 289 { "PermSize", JDK_Version::jdk(8), JDK_Version::jdk(9) },
290 290 { "MaxPermSize", JDK_Version::jdk(8), JDK_Version::jdk(9) },
291 291 { "MinPermHeapExpansion", JDK_Version::jdk(8), JDK_Version::jdk(9) },
292 292 { "MaxPermHeapExpansion", JDK_Version::jdk(8), JDK_Version::jdk(9) },
293 293 { "CMSRevisitStackSize", JDK_Version::jdk(8), JDK_Version::jdk(9) },
294 294 { "PrintRevisitStats", JDK_Version::jdk(8), JDK_Version::jdk(9) },
295 295 { "UseVectoredExceptions", JDK_Version::jdk(8), JDK_Version::jdk(9) },
296 296 { "UseSplitVerifier", JDK_Version::jdk(8), JDK_Version::jdk(9) },
297 297 { "UseISM", JDK_Version::jdk(8), JDK_Version::jdk(9) },
298 298 { "UsePermISM", JDK_Version::jdk(8), JDK_Version::jdk(9) },
299 299 { "UseMPSS", JDK_Version::jdk(8), JDK_Version::jdk(9) },
300 300 { "UseStringCache", JDK_Version::jdk(8), JDK_Version::jdk(9) },
301 301 { "UseOldInlining", JDK_Version::jdk(9), JDK_Version::jdk(10) },
302 302 { "AutoShutdownNMT", JDK_Version::jdk(9), JDK_Version::jdk(10) },
303 303 { "CompilationRepeat", JDK_Version::jdk(8), JDK_Version::jdk(9) },
304 304 #ifdef PRODUCT
305 305 { "DesiredMethodLimit",
306 306 JDK_Version::jdk_update(7, 2), JDK_Version::jdk(8) },
307 307 #endif // PRODUCT
308 308 { NULL, JDK_Version(0), JDK_Version(0) }
309 309 };
310 310
311 311 // Returns true if the flag is obsolete and fits into the range specified
312 312 // for being ignored. In the case that the flag is ignored, the 'version'
313 313 // value is filled in with the version number when the flag became
314 314 // obsolete so that that value can be displayed to the user.
315 315 bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) {
316 316 int i = 0;
317 317 assert(version != NULL, "Must provide a version buffer");
318 318 while (obsolete_jvm_flags[i].name != NULL) {
319 319 const ObsoleteFlag& flag_status = obsolete_jvm_flags[i];
320 320 // <flag>=xxx form
321 321 // [-|+]<flag> form
322 322 if ((strncmp(flag_status.name, s, strlen(flag_status.name)) == 0) ||
323 323 ((s[0] == '+' || s[0] == '-') &&
324 324 (strncmp(flag_status.name, &s[1], strlen(flag_status.name)) == 0))) {
325 325 if (JDK_Version::current().compare(flag_status.accept_until) == -1) {
326 326 *version = flag_status.obsoleted_in;
327 327 return true;
328 328 }
329 329 }
330 330 i++;
331 331 }
332 332 return false;
333 333 }
334 334
335 335 // Constructs the system class path (aka boot class path) from the following
336 336 // components, in order:
337 337 //
338 338 // prefix // from -Xbootclasspath/p:...
339 339 // endorsed // the expansion of -Djava.endorsed.dirs=...
340 340 // base // from os::get_system_properties() or -Xbootclasspath=
341 341 // suffix // from -Xbootclasspath/a:...
342 342 //
343 343 // java.endorsed.dirs is a list of directories; any jar or zip files in the
344 344 // directories are added to the sysclasspath just before the base.
345 345 //
346 346 // This could be AllStatic, but it isn't needed after argument processing is
347 347 // complete.
348 348 class SysClassPath: public StackObj {
349 349 public:
350 350 SysClassPath(const char* base);
351 351 ~SysClassPath();
352 352
353 353 inline void set_base(const char* base);
354 354 inline void add_prefix(const char* prefix);
355 355 inline void add_suffix_to_prefix(const char* suffix);
356 356 inline void add_suffix(const char* suffix);
357 357 inline void reset_path(const char* base);
358 358
359 359 // Expand the jar/zip files in each directory listed by the java.endorsed.dirs
360 360 // property. Must be called after all command-line arguments have been
361 361 // processed (in particular, -Djava.endorsed.dirs=...) and before calling
362 362 // combined_path().
363 363 void expand_endorsed();
364 364
365 365 inline const char* get_base() const { return _items[_scp_base]; }
366 366 inline const char* get_prefix() const { return _items[_scp_prefix]; }
367 367 inline const char* get_suffix() const { return _items[_scp_suffix]; }
368 368 inline const char* get_endorsed() const { return _items[_scp_endorsed]; }
369 369
370 370 // Combine all the components into a single c-heap-allocated string; caller
371 371 // must free the string if/when no longer needed.
372 372 char* combined_path();
373 373
374 374 private:
375 375 // Utility routines.
376 376 static char* add_to_path(const char* path, const char* str, bool prepend);
377 377 static char* add_jars_to_path(char* path, const char* directory);
378 378
379 379 inline void reset_item_at(int index);
380 380
381 381 // Array indices for the items that make up the sysclasspath. All except the
382 382 // base are allocated in the C heap and freed by this class.
383 383 enum {
384 384 _scp_prefix, // from -Xbootclasspath/p:...
385 385 _scp_endorsed, // the expansion of -Djava.endorsed.dirs=...
386 386 _scp_base, // the default sysclasspath
387 387 _scp_suffix, // from -Xbootclasspath/a:...
388 388 _scp_nitems // the number of items, must be last.
389 389 };
390 390
391 391 const char* _items[_scp_nitems];
392 392 DEBUG_ONLY(bool _expansion_done;)
393 393 };
394 394
395 395 SysClassPath::SysClassPath(const char* base) {
396 396 memset(_items, 0, sizeof(_items));
397 397 _items[_scp_base] = base;
398 398 DEBUG_ONLY(_expansion_done = false;)
399 399 }
400 400
401 401 SysClassPath::~SysClassPath() {
402 402 // Free everything except the base.
403 403 for (int i = 0; i < _scp_nitems; ++i) {
404 404 if (i != _scp_base) reset_item_at(i);
405 405 }
406 406 DEBUG_ONLY(_expansion_done = false;)
407 407 }
408 408
409 409 inline void SysClassPath::set_base(const char* base) {
410 410 _items[_scp_base] = base;
411 411 }
412 412
413 413 inline void SysClassPath::add_prefix(const char* prefix) {
414 414 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true);
415 415 }
416 416
417 417 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) {
418 418 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false);
419 419 }
420 420
421 421 inline void SysClassPath::add_suffix(const char* suffix) {
422 422 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false);
423 423 }
424 424
425 425 inline void SysClassPath::reset_item_at(int index) {
426 426 assert(index < _scp_nitems && index != _scp_base, "just checking");
427 427 if (_items[index] != NULL) {
428 428 FREE_C_HEAP_ARRAY(char, _items[index], mtInternal);
429 429 _items[index] = NULL;
430 430 }
431 431 }
432 432
433 433 inline void SysClassPath::reset_path(const char* base) {
434 434 // Clear the prefix and suffix.
435 435 reset_item_at(_scp_prefix);
436 436 reset_item_at(_scp_suffix);
437 437 set_base(base);
438 438 }
439 439
440 440 //------------------------------------------------------------------------------
441 441
442 442 void SysClassPath::expand_endorsed() {
443 443 assert(_items[_scp_endorsed] == NULL, "can only be called once.");
444 444
445 445 const char* path = Arguments::get_property("java.endorsed.dirs");
446 446 if (path == NULL) {
447 447 path = Arguments::get_endorsed_dir();
448 448 assert(path != NULL, "no default for java.endorsed.dirs");
449 449 }
450 450
451 451 char* expanded_path = NULL;
452 452 const char separator = *os::path_separator();
453 453 const char* const end = path + strlen(path);
454 454 while (path < end) {
455 455 const char* tmp_end = strchr(path, separator);
456 456 if (tmp_end == NULL) {
457 457 expanded_path = add_jars_to_path(expanded_path, path);
458 458 path = end;
459 459 } else {
460 460 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtInternal);
461 461 memcpy(dirpath, path, tmp_end - path);
462 462 dirpath[tmp_end - path] = '\0';
463 463 expanded_path = add_jars_to_path(expanded_path, dirpath);
464 464 FREE_C_HEAP_ARRAY(char, dirpath, mtInternal);
465 465 path = tmp_end + 1;
466 466 }
467 467 }
468 468 _items[_scp_endorsed] = expanded_path;
469 469 DEBUG_ONLY(_expansion_done = true;)
470 470 }
471 471
472 472 // Combine the bootclasspath elements, some of which may be null, into a single
473 473 // c-heap-allocated string.
474 474 char* SysClassPath::combined_path() {
475 475 assert(_items[_scp_base] != NULL, "empty default sysclasspath");
476 476 assert(_expansion_done, "must call expand_endorsed() first.");
477 477
478 478 size_t lengths[_scp_nitems];
479 479 size_t total_len = 0;
480 480
481 481 const char separator = *os::path_separator();
482 482
483 483 // Get the lengths.
484 484 int i;
485 485 for (i = 0; i < _scp_nitems; ++i) {
486 486 if (_items[i] != NULL) {
487 487 lengths[i] = strlen(_items[i]);
488 488 // Include space for the separator char (or a NULL for the last item).
489 489 total_len += lengths[i] + 1;
490 490 }
491 491 }
492 492 assert(total_len > 0, "empty sysclasspath not allowed");
493 493
494 494 // Copy the _items to a single string.
495 495 char* cp = NEW_C_HEAP_ARRAY(char, total_len, mtInternal);
496 496 char* cp_tmp = cp;
497 497 for (i = 0; i < _scp_nitems; ++i) {
498 498 if (_items[i] != NULL) {
499 499 memcpy(cp_tmp, _items[i], lengths[i]);
500 500 cp_tmp += lengths[i];
501 501 *cp_tmp++ = separator;
502 502 }
503 503 }
504 504 *--cp_tmp = '\0'; // Replace the extra separator.
505 505 return cp;
506 506 }
507 507
508 508 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
509 509 char*
510 510 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) {
511 511 char *cp;
512 512
513 513 assert(str != NULL, "just checking");
514 514 if (path == NULL) {
515 515 size_t len = strlen(str) + 1;
516 516 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
517 517 memcpy(cp, str, len); // copy the trailing null
518 518 } else {
519 519 const char separator = *os::path_separator();
520 520 size_t old_len = strlen(path);
521 521 size_t str_len = strlen(str);
522 522 size_t len = old_len + str_len + 2;
523 523
524 524 if (prepend) {
525 525 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
526 526 char* cp_tmp = cp;
527 527 memcpy(cp_tmp, str, str_len);
528 528 cp_tmp += str_len;
529 529 *cp_tmp = separator;
530 530 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null
531 531 FREE_C_HEAP_ARRAY(char, path, mtInternal);
532 532 } else {
533 533 cp = REALLOC_C_HEAP_ARRAY(char, path, len, mtInternal);
534 534 char* cp_tmp = cp + old_len;
535 535 *cp_tmp = separator;
536 536 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null
537 537 }
538 538 }
539 539 return cp;
540 540 }
541 541
542 542 // Scan the directory and append any jar or zip files found to path.
543 543 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
544 544 char* SysClassPath::add_jars_to_path(char* path, const char* directory) {
545 545 DIR* dir = os::opendir(directory);
546 546 if (dir == NULL) return path;
547 547
548 548 char dir_sep[2] = { '\0', '\0' };
549 549 size_t directory_len = strlen(directory);
550 550 const char fileSep = *os::file_separator();
551 551 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep;
552 552
553 553 /* Scan the directory for jars/zips, appending them to path. */
554 554 struct dirent *entry;
555 555 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
556 556 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
557 557 const char* name = entry->d_name;
558 558 const char* ext = name + strlen(name) - 4;
559 559 bool isJarOrZip = ext > name &&
560 560 (os::file_name_strcmp(ext, ".jar") == 0 ||
561 561 os::file_name_strcmp(ext, ".zip") == 0);
562 562 if (isJarOrZip) {
563 563 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name), mtInternal);
564 564 sprintf(jarpath, "%s%s%s", directory, dir_sep, name);
565 565 path = add_to_path(path, jarpath, false);
566 566 FREE_C_HEAP_ARRAY(char, jarpath, mtInternal);
567 567 }
568 568 }
569 569 FREE_C_HEAP_ARRAY(char, dbuf, mtInternal);
570 570 os::closedir(dir);
571 571 return path;
572 572 }
573 573
574 574 // Parses a memory size specification string.
575 575 static bool atomull(const char *s, julong* result) {
576 576 julong n = 0;
577 577 int args_read = sscanf(s, JULONG_FORMAT, &n);
578 578 if (args_read != 1) {
579 579 return false;
580 580 }
581 581 while (*s != '\0' && isdigit(*s)) {
582 582 s++;
583 583 }
584 584 // 4705540: illegal if more characters are found after the first non-digit
585 585 if (strlen(s) > 1) {
586 586 return false;
587 587 }
588 588 switch (*s) {
589 589 case 'T': case 't':
590 590 *result = n * G * K;
591 591 // Check for overflow.
592 592 if (*result/((julong)G * K) != n) return false;
593 593 return true;
594 594 case 'G': case 'g':
595 595 *result = n * G;
596 596 if (*result/G != n) return false;
597 597 return true;
598 598 case 'M': case 'm':
599 599 *result = n * M;
600 600 if (*result/M != n) return false;
601 601 return true;
602 602 case 'K': case 'k':
603 603 *result = n * K;
604 604 if (*result/K != n) return false;
605 605 return true;
606 606 case '\0':
607 607 *result = n;
608 608 return true;
609 609 default:
610 610 return false;
611 611 }
612 612 }
613 613
614 614 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) {
615 615 if (size < min_size) return arg_too_small;
616 616 // Check that size will fit in a size_t (only relevant on 32-bit)
617 617 if (size > max_uintx) return arg_too_big;
618 618 return arg_in_range;
619 619 }
620 620
621 621 // Describe an argument out of range error
622 622 void Arguments::describe_range_error(ArgsRange errcode) {
623 623 switch(errcode) {
624 624 case arg_too_big:
625 625 jio_fprintf(defaultStream::error_stream(),
626 626 "The specified size exceeds the maximum "
627 627 "representable size.\n");
628 628 break;
629 629 case arg_too_small:
630 630 case arg_unreadable:
631 631 case arg_in_range:
632 632 // do nothing for now
633 633 break;
634 634 default:
635 635 ShouldNotReachHere();
636 636 }
637 637 }
638 638
639 639 static bool set_bool_flag(char* name, bool value, Flag::Flags origin) {
640 640 return CommandLineFlags::boolAtPut(name, &value, origin);
641 641 }
642 642
643 643 static bool set_fp_numeric_flag(char* name, char* value, Flag::Flags origin) {
644 644 double v;
645 645 if (sscanf(value, "%lf", &v) != 1) {
646 646 return false;
647 647 }
648 648
649 649 if (CommandLineFlags::doubleAtPut(name, &v, origin)) {
650 650 return true;
651 651 }
652 652 return false;
653 653 }
654 654
655 655 static bool set_numeric_flag(char* name, char* value, Flag::Flags origin) {
656 656 julong v;
657 657 intx intx_v;
658 658 bool is_neg = false;
659 659 // Check the sign first since atomull() parses only unsigned values.
660 660 if (*value == '-') {
661 661 if (!CommandLineFlags::intxAt(name, &intx_v)) {
662 662 return false;
663 663 }
664 664 value++;
665 665 is_neg = true;
666 666 }
667 667 if (!atomull(value, &v)) {
668 668 return false;
669 669 }
670 670 intx_v = (intx) v;
671 671 if (is_neg) {
672 672 intx_v = -intx_v;
673 673 }
674 674 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) {
675 675 return true;
676 676 }
677 677 uintx uintx_v = (uintx) v;
678 678 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) {
679 679 return true;
680 680 }
681 681 uint64_t uint64_t_v = (uint64_t) v;
682 682 if (!is_neg && CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin)) {
683 683 return true;
684 684 }
685 685 return false;
686 686 }
687 687
688 688 static bool set_string_flag(char* name, const char* value, Flag::Flags origin) {
689 689 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false;
690 690 // Contract: CommandLineFlags always returns a pointer that needs freeing.
691 691 FREE_C_HEAP_ARRAY(char, value, mtInternal);
692 692 return true;
693 693 }
694 694
695 695 static bool append_to_string_flag(char* name, const char* new_value, Flag::Flags origin) {
696 696 const char* old_value = "";
697 697 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false;
698 698 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
699 699 size_t new_len = strlen(new_value);
700 700 const char* value;
701 701 char* free_this_too = NULL;
702 702 if (old_len == 0) {
703 703 value = new_value;
704 704 } else if (new_len == 0) {
705 705 value = old_value;
706 706 } else {
707 707 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtInternal);
708 708 // each new setting adds another LINE to the switch:
709 709 sprintf(buf, "%s\n%s", old_value, new_value);
710 710 value = buf;
711 711 free_this_too = buf;
712 712 }
713 713 (void) CommandLineFlags::ccstrAtPut(name, &value, origin);
714 714 // CommandLineFlags always returns a pointer that needs freeing.
715 715 FREE_C_HEAP_ARRAY(char, value, mtInternal);
716 716 if (free_this_too != NULL) {
717 717 // CommandLineFlags made its own copy, so I must delete my own temp. buffer.
718 718 FREE_C_HEAP_ARRAY(char, free_this_too, mtInternal);
719 719 }
720 720 return true;
721 721 }
722 722
723 723 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) {
724 724
725 725 // range of acceptable characters spelled out for portability reasons
726 726 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
727 727 #define BUFLEN 255
728 728 char name[BUFLEN+1];
729 729 char dummy;
730 730
731 731 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
732 732 return set_bool_flag(name, false, origin);
733 733 }
734 734 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
735 735 return set_bool_flag(name, true, origin);
736 736 }
737 737
738 738 char punct;
739 739 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
740 740 const char* value = strchr(arg, '=') + 1;
741 741 Flag* flag = Flag::find_flag(name, strlen(name));
742 742 if (flag != NULL && flag->is_ccstr()) {
743 743 if (flag->ccstr_accumulates()) {
744 744 return append_to_string_flag(name, value, origin);
745 745 } else {
746 746 if (value[0] == '\0') {
747 747 value = NULL;
748 748 }
749 749 return set_string_flag(name, value, origin);
750 750 }
751 751 }
752 752 }
753 753
754 754 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
755 755 const char* value = strchr(arg, '=') + 1;
756 756 // -XX:Foo:=xxx will reset the string flag to the given value.
757 757 if (value[0] == '\0') {
758 758 value = NULL;
759 759 }
760 760 return set_string_flag(name, value, origin);
761 761 }
762 762
763 763 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]"
764 764 #define SIGNED_NUMBER_RANGE "[-0123456789]"
765 765 #define NUMBER_RANGE "[0123456789]"
766 766 char value[BUFLEN + 1];
767 767 char value2[BUFLEN + 1];
768 768 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
769 769 // Looks like a floating-point number -- try again with more lenient format string
770 770 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
771 771 return set_fp_numeric_flag(name, value, origin);
772 772 }
773 773 }
774 774
775 775 #define VALUE_RANGE "[-kmgtKMGT0123456789]"
776 776 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
777 777 return set_numeric_flag(name, value, origin);
778 778 }
779 779
780 780 return false;
781 781 }
782 782
783 783 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
784 784 assert(bldarray != NULL, "illegal argument");
785 785
786 786 if (arg == NULL) {
787 787 return;
788 788 }
789 789
790 790 int new_count = *count + 1;
791 791
792 792 // expand the array and add arg to the last element
793 793 if (*bldarray == NULL) {
794 794 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtInternal);
795 795 } else {
796 796 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtInternal);
797 797 }
798 798 (*bldarray)[*count] = strdup(arg);
799 799 *count = new_count;
800 800 }
801 801
802 802 void Arguments::build_jvm_args(const char* arg) {
803 803 add_string(&_jvm_args_array, &_num_jvm_args, arg);
804 804 }
805 805
806 806 void Arguments::build_jvm_flags(const char* arg) {
807 807 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
808 808 }
809 809
810 810 // utility function to return a string that concatenates all
811 811 // strings in a given char** array
812 812 const char* Arguments::build_resource_string(char** args, int count) {
813 813 if (args == NULL || count == 0) {
814 814 return NULL;
815 815 }
816 816 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator
817 817 for (int i = 1; i < count; i++) {
818 818 length += strlen(args[i]) + 1; // add 1 for a space
819 819 }
820 820 char* s = NEW_RESOURCE_ARRAY(char, length);
821 821 strcpy(s, args[0]);
822 822 for (int j = 1; j < count; j++) {
823 823 strcat(s, " ");
824 824 strcat(s, args[j]);
825 825 }
826 826 return (const char*) s;
827 827 }
828 828
829 829 void Arguments::print_on(outputStream* st) {
830 830 st->print_cr("VM Arguments:");
831 831 if (num_jvm_flags() > 0) {
832 832 st->print("jvm_flags: "); print_jvm_flags_on(st);
833 833 }
834 834 if (num_jvm_args() > 0) {
835 835 st->print("jvm_args: "); print_jvm_args_on(st);
836 836 }
837 837 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
838 838 if (_java_class_path != NULL) {
839 839 char* path = _java_class_path->value();
840 840 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
841 841 }
842 842 st->print_cr("Launcher Type: %s", _sun_java_launcher);
843 843 }
844 844
845 845 void Arguments::print_jvm_flags_on(outputStream* st) {
846 846 if (_num_jvm_flags > 0) {
847 847 for (int i=0; i < _num_jvm_flags; i++) {
848 848 st->print("%s ", _jvm_flags_array[i]);
849 849 }
850 850 st->cr();
851 851 }
852 852 }
853 853
854 854 void Arguments::print_jvm_args_on(outputStream* st) {
855 855 if (_num_jvm_args > 0) {
856 856 for (int i=0; i < _num_jvm_args; i++) {
857 857 st->print("%s ", _jvm_args_array[i]);
858 858 }
859 859 st->cr();
860 860 }
861 861 }
862 862
863 863 bool Arguments::process_argument(const char* arg,
864 864 jboolean ignore_unrecognized, Flag::Flags origin) {
865 865
866 866 JDK_Version since = JDK_Version();
867 867
868 868 if (parse_argument(arg, origin) || ignore_unrecognized) {
869 869 return true;
870 870 }
871 871
872 872 bool has_plus_minus = (*arg == '+' || *arg == '-');
873 873 const char* const argname = has_plus_minus ? arg + 1 : arg;
874 874 if (is_newly_obsolete(arg, &since)) {
875 875 char version[256];
876 876 since.to_string(version, sizeof(version));
877 877 warning("ignoring option %s; support was removed in %s", argname, version);
878 878 return true;
879 879 }
880 880
881 881 // For locked flags, report a custom error message if available.
882 882 // Otherwise, report the standard unrecognized VM option.
883 883
884 884 size_t arg_len;
885 885 const char* equal_sign = strchr(argname, '=');
886 886 if (equal_sign == NULL) {
887 887 arg_len = strlen(argname);
888 888 } else {
889 889 arg_len = equal_sign - argname;
890 890 }
891 891
892 892 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true);
893 893 if (found_flag != NULL) {
894 894 char locked_message_buf[BUFLEN];
895 895 found_flag->get_locked_message(locked_message_buf, BUFLEN);
896 896 if (strlen(locked_message_buf) == 0) {
897 897 if (found_flag->is_bool() && !has_plus_minus) {
898 898 jio_fprintf(defaultStream::error_stream(),
899 899 "Missing +/- setting for VM option '%s'\n", argname);
900 900 } else if (!found_flag->is_bool() && has_plus_minus) {
901 901 jio_fprintf(defaultStream::error_stream(),
902 902 "Unexpected +/- setting in VM option '%s'\n", argname);
903 903 } else {
904 904 jio_fprintf(defaultStream::error_stream(),
905 905 "Improperly specified VM option '%s'\n", argname);
906 906 }
907 907 } else {
908 908 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
909 909 }
910 910 } else {
911 911 jio_fprintf(defaultStream::error_stream(),
912 912 "Unrecognized VM option '%s'\n", argname);
913 913 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
914 914 if (fuzzy_matched != NULL) {
915 915 jio_fprintf(defaultStream::error_stream(),
916 916 "Did you mean '%s%s%s'?\n",
917 917 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
918 918 fuzzy_matched->_name,
919 919 (fuzzy_matched->is_bool()) ? "" : "=<value>");
920 920 }
921 921 }
922 922
923 923 // allow for commandline "commenting out" options like -XX:#+Verbose
924 924 return arg[0] == '#';
925 925 }
926 926
927 927 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
928 928 FILE* stream = fopen(file_name, "rb");
929 929 if (stream == NULL) {
930 930 if (should_exist) {
931 931 jio_fprintf(defaultStream::error_stream(),
932 932 "Could not open settings file %s\n", file_name);
933 933 return false;
934 934 } else {
935 935 return true;
936 936 }
937 937 }
938 938
939 939 char token[1024];
940 940 int pos = 0;
941 941
942 942 bool in_white_space = true;
943 943 bool in_comment = false;
944 944 bool in_quote = false;
945 945 char quote_c = 0;
946 946 bool result = true;
947 947
948 948 int c = getc(stream);
949 949 while(c != EOF && pos < (int)(sizeof(token)-1)) {
950 950 if (in_white_space) {
951 951 if (in_comment) {
952 952 if (c == '\n') in_comment = false;
953 953 } else {
954 954 if (c == '#') in_comment = true;
955 955 else if (!isspace(c)) {
956 956 in_white_space = false;
957 957 token[pos++] = c;
958 958 }
959 959 }
960 960 } else {
961 961 if (c == '\n' || (!in_quote && isspace(c))) {
962 962 // token ends at newline, or at unquoted whitespace
963 963 // this allows a way to include spaces in string-valued options
964 964 token[pos] = '\0';
965 965 logOption(token);
966 966 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
967 967 build_jvm_flags(token);
968 968 pos = 0;
969 969 in_white_space = true;
970 970 in_quote = false;
971 971 } else if (!in_quote && (c == '\'' || c == '"')) {
972 972 in_quote = true;
973 973 quote_c = c;
974 974 } else if (in_quote && (c == quote_c)) {
975 975 in_quote = false;
976 976 } else {
977 977 token[pos++] = c;
978 978 }
979 979 }
980 980 c = getc(stream);
981 981 }
982 982 if (pos > 0) {
983 983 token[pos] = '\0';
984 984 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
985 985 build_jvm_flags(token);
986 986 }
987 987 fclose(stream);
988 988 return result;
989 989 }
990 990
991 991 //=============================================================================================================
992 992 // Parsing of properties (-D)
993 993
994 994 const char* Arguments::get_property(const char* key) {
995 995 return PropertyList_get_value(system_properties(), key);
996 996 }
997 997
998 998 bool Arguments::add_property(const char* prop) {
999 999 const char* eq = strchr(prop, '=');
1000 1000 char* key;
1001 1001 // ns must be static--its address may be stored in a SystemProperty object.
1002 1002 const static char ns[1] = {0};
1003 1003 char* value = (char *)ns;
1004 1004
1005 1005 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop);
1006 1006 key = AllocateHeap(key_len + 1, mtInternal);
1007 1007 strncpy(key, prop, key_len);
1008 1008 key[key_len] = '\0';
1009 1009
1010 1010 if (eq != NULL) {
1011 1011 size_t value_len = strlen(prop) - key_len - 1;
1012 1012 value = AllocateHeap(value_len + 1, mtInternal);
1013 1013 strncpy(value, &prop[key_len + 1], value_len + 1);
1014 1014 }
1015 1015
1016 1016 if (strcmp(key, "java.compiler") == 0) {
1017 1017 process_java_compiler_argument(value);
1018 1018 FreeHeap(key);
1019 1019 if (eq != NULL) {
1020 1020 FreeHeap(value);
1021 1021 }
1022 1022 return true;
1023 1023 } else if (strcmp(key, "sun.java.command") == 0) {
1024 1024 _java_command = value;
1025 1025
1026 1026 // Record value in Arguments, but let it get passed to Java.
1027 1027 } else if (strcmp(key, "sun.java.launcher.pid") == 0) {
1028 1028 // launcher.pid property is private and is processed
1029 1029 // in process_sun_java_launcher_properties();
1030 1030 // the sun.java.launcher property is passed on to the java application
1031 1031 FreeHeap(key);
1032 1032 if (eq != NULL) {
1033 1033 FreeHeap(value);
1034 1034 }
1035 1035 return true;
1036 1036 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1037 1037 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1038 1038 // its value without going through the property list or making a Java call.
1039 1039 _java_vendor_url_bug = value;
1040 1040 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1041 1041 PropertyList_unique_add(&_system_properties, key, value, true);
1042 1042 return true;
1043 1043 }
1044 1044 // Create new property and add at the end of the list
1045 1045 PropertyList_unique_add(&_system_properties, key, value);
1046 1046 return true;
1047 1047 }
1048 1048
1049 1049 //===========================================================================================================
1050 1050 // Setting int/mixed/comp mode flags
1051 1051
1052 1052 void Arguments::set_mode_flags(Mode mode) {
1053 1053 // Set up default values for all flags.
1054 1054 // If you add a flag to any of the branches below,
1055 1055 // add a default value for it here.
1056 1056 set_java_compiler(false);
1057 1057 _mode = mode;
1058 1058
1059 1059 // Ensure Agent_OnLoad has the correct initial values.
1060 1060 // This may not be the final mode; mode may change later in onload phase.
1061 1061 PropertyList_unique_add(&_system_properties, "java.vm.info",
1062 1062 (char*)VM_Version::vm_info_string(), false);
1063 1063
1064 1064 UseInterpreter = true;
1065 1065 UseCompiler = true;
1066 1066 UseLoopCounter = true;
1067 1067
1068 1068 #ifndef ZERO
1069 1069 // Turn these off for mixed and comp. Leave them on for Zero.
1070 1070 if (FLAG_IS_DEFAULT(UseFastAccessorMethods)) {
1071 1071 UseFastAccessorMethods = (mode == _int);
1072 1072 }
1073 1073 if (FLAG_IS_DEFAULT(UseFastEmptyMethods)) {
1074 1074 UseFastEmptyMethods = (mode == _int);
1075 1075 }
1076 1076 #endif
1077 1077
1078 1078 // Default values may be platform/compiler dependent -
1079 1079 // use the saved values
1080 1080 ClipInlining = Arguments::_ClipInlining;
1081 1081 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1082 1082 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1083 1083 BackgroundCompilation = Arguments::_BackgroundCompilation;
1084 1084
1085 1085 // Change from defaults based on mode
1086 1086 switch (mode) {
1087 1087 default:
1088 1088 ShouldNotReachHere();
1089 1089 break;
1090 1090 case _int:
1091 1091 UseCompiler = false;
1092 1092 UseLoopCounter = false;
1093 1093 AlwaysCompileLoopMethods = false;
1094 1094 UseOnStackReplacement = false;
1095 1095 break;
1096 1096 case _mixed:
1097 1097 // same as default
1098 1098 break;
1099 1099 case _comp:
1100 1100 UseInterpreter = false;
1101 1101 BackgroundCompilation = false;
1102 1102 ClipInlining = false;
1103 1103 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1104 1104 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1105 1105 // compile a level 4 (C2) and then continue executing it.
1106 1106 if (TieredCompilation) {
1107 1107 Tier3InvokeNotifyFreqLog = 0;
1108 1108 Tier4InvocationThreshold = 0;
1109 1109 }
1110 1110 break;
1111 1111 }
1112 1112 }
1113 1113
1114 1114 #if defined(COMPILER2) || defined(_LP64) || !INCLUDE_CDS
1115 1115 // Conflict: required to use shared spaces (-Xshare:on), but
1116 1116 // incompatible command line options were chosen.
1117 1117
1118 1118 static void no_shared_spaces(const char* message) {
1119 1119 if (RequireSharedSpaces) {
1120 1120 jio_fprintf(defaultStream::error_stream(),
1121 1121 "Class data sharing is inconsistent with other specified options.\n");
1122 1122 vm_exit_during_initialization("Unable to use shared archive.", message);
1123 1123 } else {
1124 1124 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1125 1125 }
1126 1126 }
1127 1127 #endif
1128 1128
1129 1129 void Arguments::set_tiered_flags() {
1130 1130 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
1131 1131 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1132 1132 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
1133 1133 }
1134 1134 if (CompilationPolicyChoice < 2) {
1135 1135 vm_exit_during_initialization(
1136 1136 "Incompatible compilation policy selected", NULL);
1137 1137 }
1138 1138 // Increase the code cache size - tiered compiles a lot more.
1139 1139 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1140 1140 FLAG_SET_DEFAULT(ReservedCodeCacheSize, ReservedCodeCacheSize * 5);
1141 1141 }
1142 1142 if (!UseInterpreter) { // -Xcomp
1143 1143 Tier3InvokeNotifyFreqLog = 0;
1144 1144 Tier4InvocationThreshold = 0;
1145 1145 }
1146 1146 }
1147 1147
1148 1148 /**
1149 1149 * Returns the minimum number of compiler threads needed to run the JVM. The following
1150 1150 * configurations are possible.
1151 1151 *
1152 1152 * 1) The JVM is build using an interpreter only. As a result, the minimum number of
1153 1153 * compiler threads is 0.
1154 1154 * 2) The JVM is build using the compiler(s) and tiered compilation is disabled. As
1155 1155 * a result, either C1 or C2 is used, so the minimum number of compiler threads is 1.
1156 1156 * 3) The JVM is build using the compiler(s) and tiered compilation is enabled. However,
1157 1157 * the option "TieredStopAtLevel < CompLevel_full_optimization". As a result, only
1158 1158 * C1 can be used, so the minimum number of compiler threads is 1.
1159 1159 * 4) The JVM is build using the compilers and tiered compilation is enabled. The option
1160 1160 * 'TieredStopAtLevel = CompLevel_full_optimization' (the default value). As a result,
1161 1161 * the minimum number of compiler threads is 2.
1162 1162 */
1163 1163 int Arguments::get_min_number_of_compiler_threads() {
1164 1164 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
1165 1165 return 0; // case 1
1166 1166 #else
1167 1167 if (!TieredCompilation || (TieredStopAtLevel < CompLevel_full_optimization)) {
1168 1168 return 1; // case 2 or case 3
1169 1169 }
1170 1170 return 2; // case 4 (tiered)
1171 1171 #endif
1172 1172 }
1173 1173
1174 1174 #if INCLUDE_ALL_GCS
1175 1175 static void disable_adaptive_size_policy(const char* collector_name) {
1176 1176 if (UseAdaptiveSizePolicy) {
1177 1177 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) {
1178 1178 warning("disabling UseAdaptiveSizePolicy; it is incompatible with %s.",
1179 1179 collector_name);
1180 1180 }
1181 1181 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false);
1182 1182 }
1183 1183 }
1184 1184
1185 1185 void Arguments::set_parnew_gc_flags() {
1186 1186 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC,
1187 1187 "control point invariant");
1188 1188 assert(UseParNewGC, "Error");
1189 1189
1190 1190 // Turn off AdaptiveSizePolicy for parnew until it is complete.
1191 1191 disable_adaptive_size_policy("UseParNewGC");
1192 1192
1193 1193 if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
1194 1194 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1195 1195 assert(ParallelGCThreads > 0, "We should always have at least one thread by default");
1196 1196 } else if (ParallelGCThreads == 0) {
1197 1197 jio_fprintf(defaultStream::error_stream(),
1198 1198 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n");
1199 1199 vm_exit(1);
1200 1200 }
1201 1201
1202 1202 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively,
1203 1203 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration
1204 1204 // we set them to 1024 and 1024.
1205 1205 // See CR 6362902.
1206 1206 if (FLAG_IS_DEFAULT(YoungPLABSize)) {
1207 1207 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024);
1208 1208 }
1209 1209 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1210 1210 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024);
1211 1211 }
1212 1212
1213 1213 // AlwaysTenure flag should make ParNew promote all at first collection.
1214 1214 // See CR 6362902.
1215 1215 if (AlwaysTenure) {
1216 1216 FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0);
1217 1217 }
1218 1218 // When using compressed oops, we use local overflow stacks,
1219 1219 // rather than using a global overflow list chained through
1220 1220 // the klass word of the object's pre-image.
1221 1221 if (UseCompressedOops && !ParGCUseLocalOverflow) {
1222 1222 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) {
1223 1223 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references");
1224 1224 }
1225 1225 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true);
1226 1226 }
1227 1227 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error");
1228 1228 }
1229 1229
1230 1230 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on
1231 1231 // sparc/solaris for certain applications, but would gain from
1232 1232 // further optimization and tuning efforts, and would almost
1233 1233 // certainly gain from analysis of platform and environment.
1234 1234 void Arguments::set_cms_and_parnew_gc_flags() {
1235 1235 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error");
1236 1236 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1237 1237
1238 1238 // If we are using CMS, we prefer to UseParNewGC,
1239 1239 // unless explicitly forbidden.
1240 1240 if (FLAG_IS_DEFAULT(UseParNewGC)) {
1241 1241 FLAG_SET_ERGO(bool, UseParNewGC, true);
1242 1242 }
1243 1243
1244 1244 // Turn off AdaptiveSizePolicy by default for cms until it is complete.
1245 1245 disable_adaptive_size_policy("UseConcMarkSweepGC");
1246 1246
1247 1247 // In either case, adjust ParallelGCThreads and/or UseParNewGC
1248 1248 // as needed.
1249 1249 if (UseParNewGC) {
1250 1250 set_parnew_gc_flags();
1251 1251 }
1252 1252
1253 1253 size_t max_heap = align_size_down(MaxHeapSize,
1254 1254 CardTableRS::ct_max_alignment_constraint());
1255 1255
1256 1256 // Now make adjustments for CMS
1257 1257 intx tenuring_default = (intx)6;
1258 1258 size_t young_gen_per_worker = CMSYoungGenPerWorker;
1259 1259
1260 1260 // Preferred young gen size for "short" pauses:
1261 1261 // upper bound depends on # of threads and NewRatio.
1262 1262 const uintx parallel_gc_threads =
1263 1263 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads);
1264 1264 const size_t preferred_max_new_size_unaligned =
1265 1265 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * parallel_gc_threads));
1266 1266 size_t preferred_max_new_size =
1267 1267 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size());
1268 1268
1269 1269 // Unless explicitly requested otherwise, size young gen
1270 1270 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads
1271 1271
1272 1272 // If either MaxNewSize or NewRatio is set on the command line,
1273 1273 // assume the user is trying to set the size of the young gen.
1274 1274 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) {
1275 1275
1276 1276 // Set MaxNewSize to our calculated preferred_max_new_size unless
1277 1277 // NewSize was set on the command line and it is larger than
1278 1278 // preferred_max_new_size.
1279 1279 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line
1280 1280 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size));
1281 1281 } else {
1282 1282 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size);
1283 1283 }
1284 1284 if (PrintGCDetails && Verbose) {
1285 1285 // Too early to use gclog_or_tty
1286 1286 tty->print_cr("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize);
1287 1287 }
1288 1288
1289 1289 // Code along this path potentially sets NewSize and OldSize
1290 1290 if (PrintGCDetails && Verbose) {
1291 1291 // Too early to use gclog_or_tty
1292 1292 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT
1293 1293 " initial_heap_size: " SIZE_FORMAT
1294 1294 " max_heap: " SIZE_FORMAT,
1295 1295 min_heap_size(), InitialHeapSize, max_heap);
1296 1296 }
1297 1297 size_t min_new = preferred_max_new_size;
1298 1298 if (FLAG_IS_CMDLINE(NewSize)) {
1299 1299 min_new = NewSize;
1300 1300 }
1301 1301 if (max_heap > min_new && min_heap_size() > min_new) {
1302 1302 // Unless explicitly requested otherwise, make young gen
1303 1303 // at least min_new, and at most preferred_max_new_size.
1304 1304 if (FLAG_IS_DEFAULT(NewSize)) {
1305 1305 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new));
1306 1306 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize));
1307 1307 if (PrintGCDetails && Verbose) {
1308 1308 // Too early to use gclog_or_tty
1309 1309 tty->print_cr("CMS ergo set NewSize: " SIZE_FORMAT, NewSize);
1310 1310 }
1311 1311 }
1312 1312 // Unless explicitly requested otherwise, size old gen
1313 1313 // so it's NewRatio x of NewSize.
1314 1314 if (FLAG_IS_DEFAULT(OldSize)) {
1315 1315 if (max_heap > NewSize) {
1316 1316 FLAG_SET_ERGO(uintx, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize));
1317 1317 if (PrintGCDetails && Verbose) {
1318 1318 // Too early to use gclog_or_tty
1319 1319 tty->print_cr("CMS ergo set OldSize: " SIZE_FORMAT, OldSize);
1320 1320 }
1321 1321 }
1322 1322 }
1323 1323 }
1324 1324 }
1325 1325 // Unless explicitly requested otherwise, definitely
1326 1326 // promote all objects surviving "tenuring_default" scavenges.
1327 1327 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) &&
1328 1328 FLAG_IS_DEFAULT(SurvivorRatio)) {
1329 1329 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default);
1330 1330 }
1331 1331 // If we decided above (or user explicitly requested)
1332 1332 // `promote all' (via MaxTenuringThreshold := 0),
1333 1333 // prefer minuscule survivor spaces so as not to waste
1334 1334 // space for (non-existent) survivors
1335 1335 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) {
1336 1336 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio));
1337 1337 }
1338 1338 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not,
1339 1339 // set CMSParPromoteBlocksToClaim equal to OldPLABSize.
1340 1340 // This is done in order to make ParNew+CMS configuration to work
1341 1341 // with YoungPLABSize and OldPLABSize options.
1342 1342 // See CR 6362902.
1343 1343 if (!FLAG_IS_DEFAULT(OldPLABSize)) {
1344 1344 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) {
1345 1345 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim
1346 1346 // is. In this situtation let CMSParPromoteBlocksToClaim follow
1347 1347 // the value (either from the command line or ergonomics) of
1348 1348 // OldPLABSize. Following OldPLABSize is an ergonomics decision.
1349 1349 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize);
1350 1350 } else {
1351 1351 // OldPLABSize and CMSParPromoteBlocksToClaim are both set.
1352 1352 // CMSParPromoteBlocksToClaim is a collector-specific flag, so
1353 1353 // we'll let it to take precedence.
1354 1354 jio_fprintf(defaultStream::error_stream(),
1355 1355 "Both OldPLABSize and CMSParPromoteBlocksToClaim"
1356 1356 " options are specified for the CMS collector."
1357 1357 " CMSParPromoteBlocksToClaim will take precedence.\n");
1358 1358 }
1359 1359 }
1360 1360 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) {
1361 1361 // OldPLAB sizing manually turned off: Use a larger default setting,
1362 1362 // unless it was manually specified. This is because a too-low value
1363 1363 // will slow down scavenges.
1364 1364 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) {
1365 1365 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, 50); // default value before 6631166
1366 1366 }
1367 1367 }
1368 1368 // Overwrite OldPLABSize which is the variable we will internally use everywhere.
1369 1369 FLAG_SET_ERGO(uintx, OldPLABSize, CMSParPromoteBlocksToClaim);
1370 1370 // If either of the static initialization defaults have changed, note this
1371 1371 // modification.
1372 1372 if (!FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim) || !FLAG_IS_DEFAULT(OldPLABWeight)) {
1373 1373 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight);
1374 1374 }
1375 1375 if (PrintGCDetails && Verbose) {
1376 1376 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1377 1377 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1378 1378 tty->print_cr("ConcGCThreads: %u", (uint) ConcGCThreads);
1379 1379 }
1380 1380 }
1381 1381 #endif // INCLUDE_ALL_GCS
1382 1382
1383 1383 void set_object_alignment() {
1384 1384 // Object alignment.
1385 1385 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1386 1386 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1387 1387 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1388 1388 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1389 1389 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1390 1390 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1391 1391
1392 1392 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1393 1393 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1394 1394
1395 1395 // Oop encoding heap max
1396 1396 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1397 1397
1398 1398 #if INCLUDE_ALL_GCS
1399 1399 // Set CMS global values
1400 1400 CompactibleFreeListSpace::set_cms_values();
1401 1401 #endif // INCLUDE_ALL_GCS
1402 1402 }
1403 1403
1404 1404 bool verify_object_alignment() {
1405 1405 // Object alignment.
1406 1406 if (!is_power_of_2(ObjectAlignmentInBytes)) {
1407 1407 jio_fprintf(defaultStream::error_stream(),
1408 1408 "error: ObjectAlignmentInBytes=%d must be power of 2\n",
1409 1409 (int)ObjectAlignmentInBytes);
1410 1410 return false;
1411 1411 }
1412 1412 if ((int)ObjectAlignmentInBytes < BytesPerLong) {
1413 1413 jio_fprintf(defaultStream::error_stream(),
1414 1414 "error: ObjectAlignmentInBytes=%d must be greater or equal %d\n",
1415 1415 (int)ObjectAlignmentInBytes, BytesPerLong);
1416 1416 return false;
1417 1417 }
1418 1418 // It does not make sense to have big object alignment
1419 1419 // since a space lost due to alignment will be greater
1420 1420 // then a saved space from compressed oops.
1421 1421 if ((int)ObjectAlignmentInBytes > 256) {
1422 1422 jio_fprintf(defaultStream::error_stream(),
1423 1423 "error: ObjectAlignmentInBytes=%d must not be greater than 256\n",
1424 1424 (int)ObjectAlignmentInBytes);
1425 1425 return false;
1426 1426 }
1427 1427 // In case page size is very small.
1428 1428 if ((int)ObjectAlignmentInBytes >= os::vm_page_size()) {
1429 1429 jio_fprintf(defaultStream::error_stream(),
1430 1430 "error: ObjectAlignmentInBytes=%d must be less than page size %d\n",
1431 1431 (int)ObjectAlignmentInBytes, os::vm_page_size());
1432 1432 return false;
1433 1433 }
1434 1434 if(SurvivorAlignmentInBytes == 0) {
1435 1435 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1436 1436 } else {
1437 1437 if (!is_power_of_2(SurvivorAlignmentInBytes)) {
1438 1438 jio_fprintf(defaultStream::error_stream(),
1439 1439 "error: SurvivorAlignmentInBytes=%d must be power of 2\n",
1440 1440 (int)SurvivorAlignmentInBytes);
1441 1441 return false;
1442 1442 }
1443 1443 if (SurvivorAlignmentInBytes < ObjectAlignmentInBytes) {
1444 1444 jio_fprintf(defaultStream::error_stream(),
1445 1445 "error: SurvivorAlignmentInBytes=%d must be greater than ObjectAlignmentInBytes=%d \n",
1446 1446 (int)SurvivorAlignmentInBytes, (int)ObjectAlignmentInBytes);
1447 1447 return false;
1448 1448 }
1449 1449 }
1450 1450 return true;
1451 1451 }
1452 1452
1453 1453 size_t Arguments::max_heap_for_compressed_oops() {
1454 1454 // Avoid sign flip.
1455 1455 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1456 1456 // We need to fit both the NULL page and the heap into the memory budget, while
1457 1457 // keeping alignment constraints of the heap. To guarantee the latter, as the
1458 1458 // NULL page is located before the heap, we pad the NULL page to the conservative
1459 1459 // maximum alignment that the GC may ever impose upon the heap.
1460 1460 size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(),
1461 1461 _conservative_max_heap_alignment);
1462 1462
1463 1463 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1464 1464 NOT_LP64(ShouldNotReachHere(); return 0);
1465 1465 }
1466 1466
1467 1467 bool Arguments::should_auto_select_low_pause_collector() {
1468 1468 if (UseAutoGCSelectPolicy &&
1469 1469 !FLAG_IS_DEFAULT(MaxGCPauseMillis) &&
1470 1470 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) {
1471 1471 if (PrintGCDetails) {
1472 1472 // Cannot use gclog_or_tty yet.
1473 1473 tty->print_cr("Automatic selection of the low pause collector"
1474 1474 " based on pause goal of %d (ms)", (int) MaxGCPauseMillis);
1475 1475 }
1476 1476 return true;
1477 1477 }
1478 1478 return false;
1479 1479 }
1480 1480
1481 1481 void Arguments::set_use_compressed_oops() {
1482 1482 #ifndef ZERO
1483 1483 #ifdef _LP64
1484 1484 // MaxHeapSize is not set up properly at this point, but
1485 1485 // the only value that can override MaxHeapSize if we are
1486 1486 // to use UseCompressedOops is InitialHeapSize.
1487 1487 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1488 1488
1489 1489 if (max_heap_size <= max_heap_for_compressed_oops()) {
1490 1490 #if !defined(COMPILER1) || defined(TIERED)
1491 1491 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1492 1492 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1493 1493 }
1494 1494 #endif
1495 1495 #ifdef _WIN64
1496 1496 if (UseLargePages && UseCompressedOops) {
1497 1497 // Cannot allocate guard pages for implicit checks in indexed addressing
1498 1498 // mode, when large pages are specified on windows.
1499 1499 // This flag could be switched ON if narrow oop base address is set to 0,
1500 1500 // see code in Universe::initialize_heap().
1501 1501 Universe::set_narrow_oop_use_implicit_null_checks(false);
1502 1502 }
1503 1503 #endif // _WIN64
1504 1504 } else {
1505 1505 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1506 1506 warning("Max heap size too large for Compressed Oops");
1507 1507 FLAG_SET_DEFAULT(UseCompressedOops, false);
1508 1508 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1509 1509 }
1510 1510 }
1511 1511 #endif // _LP64
1512 1512 #endif // ZERO
1513 1513 }
1514 1514
1515 1515
1516 1516 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1517 1517 // set_use_compressed_oops().
1518 1518 void Arguments::set_use_compressed_klass_ptrs() {
1519 1519 #ifndef ZERO
1520 1520 #ifdef _LP64
1521 1521 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1522 1522 if (!UseCompressedOops) {
1523 1523 if (UseCompressedClassPointers) {
1524 1524 warning("UseCompressedClassPointers requires UseCompressedOops");
1525 1525 }
1526 1526 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1527 1527 } else {
1528 1528 // Turn on UseCompressedClassPointers too
1529 1529 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1530 1530 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1531 1531 }
1532 1532 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1533 1533 if (UseCompressedClassPointers) {
1534 1534 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1535 1535 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1536 1536 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1537 1537 }
1538 1538 }
1539 1539 }
1540 1540 #endif // _LP64
1541 1541 #endif // !ZERO
1542 1542 }
1543 1543
1544 1544 void Arguments::set_conservative_max_heap_alignment() {
1545 1545 // The conservative maximum required alignment for the heap is the maximum of
1546 1546 // the alignments imposed by several sources: any requirements from the heap
1547 1547 // itself, the collector policy and the maximum page size we may run the VM
1548 1548 // with.
1549 1549 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment();
1550 1550 #if INCLUDE_ALL_GCS
1551 1551 if (UseParallelGC) {
1552 1552 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment();
1553 1553 } else if (UseG1GC) {
1554 1554 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment();
1555 1555 }
1556 1556 #endif // INCLUDE_ALL_GCS
1557 1557 _conservative_max_heap_alignment = MAX4(heap_alignment,
1558 1558 (size_t)os::vm_allocation_granularity(),
1559 1559 os::max_page_size(),
1560 1560 CollectorPolicy::compute_heap_alignment());
1561 1561 }
1562 1562
1563 1563 void Arguments::select_gc_ergonomically() {
1564 1564 if (os::is_server_class_machine()) {
1565 1565 if (should_auto_select_low_pause_collector()) {
1566 1566 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true);
1567 1567 } else {
1568 1568 FLAG_SET_ERGO(bool, UseParallelGC, true);
1569 1569 }
1570 1570 }
1571 1571 }
1572 1572
1573 1573 void Arguments::select_gc() {
1574 1574 if (!gc_selected()) {
1575 1575 ArgumentsExt::select_gc_ergonomically();
1576 1576 }
1577 1577 }
1578 1578
1579 1579 void Arguments::set_ergonomics_flags() {
1580 1580 select_gc();
1581 1581
1582 1582 #ifdef COMPILER2
1583 1583 // Shared spaces work fine with other GCs but causes bytecode rewriting
1584 1584 // to be disabled, which hurts interpreter performance and decreases
1585 1585 // server performance. When -server is specified, keep the default off
1586 1586 // unless it is asked for. Future work: either add bytecode rewriting
1587 1587 // at link time, or rewrite bytecodes in non-shared methods.
1588 1588 if (!DumpSharedSpaces && !RequireSharedSpaces &&
1589 1589 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) {
1590 1590 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on.");
1591 1591 }
1592 1592 #endif
1593 1593
1594 1594 set_conservative_max_heap_alignment();
1595 1595
1596 1596 #ifndef ZERO
1597 1597 #ifdef _LP64
1598 1598 set_use_compressed_oops();
1599 1599
1600 1600 // set_use_compressed_klass_ptrs() must be called after calling
1601 1601 // set_use_compressed_oops().
1602 1602 set_use_compressed_klass_ptrs();
1603 1603
1604 1604 // Also checks that certain machines are slower with compressed oops
1605 1605 // in vm_version initialization code.
1606 1606 #endif // _LP64
1607 1607 #endif // !ZERO
1608 1608 }
1609 1609
1610 1610 void Arguments::set_parallel_gc_flags() {
1611 1611 assert(UseParallelGC || UseParallelOldGC, "Error");
1612 1612 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file).
1613 1613 if (FLAG_IS_DEFAULT(UseParallelOldGC)) {
1614 1614 FLAG_SET_DEFAULT(UseParallelOldGC, true);
1615 1615 }
1616 1616 FLAG_SET_DEFAULT(UseParallelGC, true);
1617 1617
1618 1618 // If no heap maximum was requested explicitly, use some reasonable fraction
1619 1619 // of the physical memory, up to a maximum of 1GB.
1620 1620 FLAG_SET_DEFAULT(ParallelGCThreads,
1621 1621 Abstract_VM_Version::parallel_worker_threads());
1622 1622 if (ParallelGCThreads == 0) {
1623 1623 jio_fprintf(defaultStream::error_stream(),
1624 1624 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n");
1625 1625 vm_exit(1);
1626 1626 }
1627 1627
1628 1628 if (UseAdaptiveSizePolicy) {
1629 1629 // We don't want to limit adaptive heap sizing's freedom to adjust the heap
1630 1630 // unless the user actually sets these flags.
1631 1631 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) {
1632 1632 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0);
1633 1633 _min_heap_free_ratio = MinHeapFreeRatio;
1634 1634 }
1635 1635 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) {
1636 1636 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100);
1637 1637 _max_heap_free_ratio = MaxHeapFreeRatio;
1638 1638 }
1639 1639 }
1640 1640
1641 1641 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
1642 1642 // SurvivorRatio has been set, reset their default values to SurvivorRatio +
1643 1643 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
1644 1644 // See CR 6362902 for details.
1645 1645 if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
1646 1646 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
1647 1647 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
1648 1648 }
1649 1649 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
1650 1650 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
1651 1651 }
1652 1652 }
1653 1653
1654 1654 if (UseParallelOldGC) {
1655 1655 // Par compact uses lower default values since they are treated as
1656 1656 // minimums. These are different defaults because of the different
1657 1657 // interpretation and are not ergonomically set.
1658 1658 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) {
1659 1659 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1);
1660 1660 }
1661 1661 }
1662 1662 }
1663 1663
1664 1664 void Arguments::set_g1_gc_flags() {
1665 1665 assert(UseG1GC, "Error");
1666 1666 #ifdef COMPILER1
1667 1667 FastTLABRefill = false;
1668 1668 #endif
1669 1669 FLAG_SET_DEFAULT(ParallelGCThreads,
1670 1670 Abstract_VM_Version::parallel_worker_threads());
1671 1671 if (ParallelGCThreads == 0) {
1672 1672 FLAG_SET_DEFAULT(ParallelGCThreads,
1673 1673 Abstract_VM_Version::parallel_worker_threads());
1674 1674 }
1675 1675
1676 1676 #if INCLUDE_ALL_GCS
1677 1677 if (G1ConcRefinementThreads == 0) {
1678 1678 FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads);
1679 1679 }
1680 1680 #endif
1681 1681
1682 1682 // MarkStackSize will be set (if it hasn't been set by the user)
1683 1683 // when concurrent marking is initialized.
1684 1684 // Its value will be based upon the number of parallel marking threads.
1685 1685 // But we do set the maximum mark stack size here.
1686 1686 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
1687 1687 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE);
1688 1688 }
1689 1689
1690 1690 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
1691 1691 // In G1, we want the default GC overhead goal to be higher than
1692 1692 // say in PS. So we set it here to 10%. Otherwise the heap might
1693 1693 // be expanded more aggressively than we would like it to. In
1694 1694 // fact, even 10% seems to not be high enough in some cases
1695 1695 // (especially small GC stress tests that the main thing they do
1696 1696 // is allocation). We might consider increase it further.
1697 1697 FLAG_SET_DEFAULT(GCTimeRatio, 9);
1698 1698 }
1699 1699
1700 1700 if (PrintGCDetails && Verbose) {
1701 1701 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1702 1702 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1703 1703 tty->print_cr("ConcGCThreads: %u", (uint) ConcGCThreads);
1704 1704 }
1705 1705 }
1706 1706
1707 1707 #if !INCLUDE_ALL_GCS
1708 1708 #ifdef ASSERT
1709 1709 static bool verify_serial_gc_flags() {
1710 1710 return (UseSerialGC &&
1711 1711 !(UseParNewGC || (UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC ||
1712 1712 UseParallelGC || UseParallelOldGC));
1713 1713 }
1714 1714 #endif // ASSERT
1715 1715 #endif // INCLUDE_ALL_GCS
1716 1716
1717 1717 void Arguments::set_gc_specific_flags() {
1718 1718 #if INCLUDE_ALL_GCS
1719 1719 // Set per-collector flags
1720 1720 if (UseParallelGC || UseParallelOldGC) {
1721 1721 set_parallel_gc_flags();
1722 1722 } else if (UseConcMarkSweepGC) { // Should be done before ParNew check below
1723 1723 set_cms_and_parnew_gc_flags();
1724 1724 } else if (UseParNewGC) { // Skipped if CMS is set above
1725 1725 set_parnew_gc_flags();
1726 1726 } else if (UseG1GC) {
1727 1727 set_g1_gc_flags();
1728 1728 }
1729 1729 check_deprecated_gcs();
1730 1730 check_deprecated_gc_flags();
1731 1731 if (AssumeMP && !UseSerialGC) {
1732 1732 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
1733 1733 warning("If the number of processors is expected to increase from one, then"
1734 1734 " you should configure the number of parallel GC threads appropriately"
1735 1735 " using -XX:ParallelGCThreads=N");
1736 1736 }
1737 1737 }
1738 1738 if (MinHeapFreeRatio == 100) {
1739 1739 // Keeping the heap 100% free is hard ;-) so limit it to 99%.
1740 1740 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
1741 1741 }
1742 1742 #else // INCLUDE_ALL_GCS
1743 1743 assert(verify_serial_gc_flags(), "SerialGC unset");
1744 1744 #endif // INCLUDE_ALL_GCS
1745 1745 }
1746 1746
1747 1747 julong Arguments::limit_by_allocatable_memory(julong limit) {
1748 1748 julong max_allocatable;
1749 1749 julong result = limit;
1750 1750 if (os::has_allocatable_memory_limit(&max_allocatable)) {
1751 1751 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
1752 1752 }
1753 1753 return result;
1754 1754 }
1755 1755
1756 1756 void Arguments::set_heap_size() {
1757 1757 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) {
1758 1758 // Deprecated flag
1759 1759 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction);
1760 1760 }
1761 1761
1762 1762 const julong phys_mem =
1763 1763 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1764 1764 : (julong)MaxRAM;
1765 1765
1766 1766 // If the maximum heap size has not been set with -Xmx,
1767 1767 // then set it as fraction of the size of physical memory,
1768 1768 // respecting the maximum and minimum sizes of the heap.
1769 1769 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1770 1770 julong reasonable_max = phys_mem / MaxRAMFraction;
1771 1771
1772 1772 if (phys_mem <= MaxHeapSize * MinRAMFraction) {
1773 1773 // Small physical memory, so use a minimum fraction of it for the heap
1774 1774 reasonable_max = phys_mem / MinRAMFraction;
1775 1775 } else {
1776 1776 // Not-small physical memory, so require a heap at least
1777 1777 // as large as MaxHeapSize
1778 1778 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1779 1779 }
1780 1780 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1781 1781 // Limit the heap size to ErgoHeapSizeLimit
1782 1782 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1783 1783 }
1784 1784 if (UseCompressedOops) {
1785 1785 // Limit the heap size to the maximum possible when using compressed oops
1786 1786 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1787 1787 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1788 1788 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1789 1789 // but it should be not less than default MaxHeapSize.
1790 1790 max_coop_heap -= HeapBaseMinAddress;
1791 1791 }
1792 1792 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1793 1793 }
1794 1794 reasonable_max = limit_by_allocatable_memory(reasonable_max);
1795 1795
1796 1796 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1797 1797 // An initial heap size was specified on the command line,
1798 1798 // so be sure that the maximum size is consistent. Done
1799 1799 // after call to limit_by_allocatable_memory because that
1800 1800 // method might reduce the allocation size.
1801 1801 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1802 1802 }
1803 1803
1804 1804 if (PrintGCDetails && Verbose) {
1805 1805 // Cannot use gclog_or_tty yet.
1806 1806 tty->print_cr(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
1807 1807 }
1808 1808 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx)reasonable_max);
1809 1809 }
1810 1810
1811 1811 // If the minimum or initial heap_size have not been set or requested to be set
1812 1812 // ergonomically, set them accordingly.
1813 1813 if (InitialHeapSize == 0 || min_heap_size() == 0) {
1814 1814 julong reasonable_minimum = (julong)(OldSize + NewSize);
1815 1815
1816 1816 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1817 1817
1818 1818 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
1819 1819
1820 1820 if (InitialHeapSize == 0) {
1821 1821 julong reasonable_initial = phys_mem / InitialRAMFraction;
1822 1822
1823 1823 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
1824 1824 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1825 1825
1826 1826 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
1827 1827
1828 1828 if (PrintGCDetails && Verbose) {
1829 1829 // Cannot use gclog_or_tty yet.
1830 1830 tty->print_cr(" Initial heap size " SIZE_FORMAT, (uintx)reasonable_initial);
1831 1831 }
1832 1832 FLAG_SET_ERGO(uintx, InitialHeapSize, (uintx)reasonable_initial);
1833 1833 }
1834 1834 // If the minimum heap size has not been set (via -Xms),
1835 1835 // synchronize with InitialHeapSize to avoid errors with the default value.
1836 1836 if (min_heap_size() == 0) {
1837 1837 set_min_heap_size(MIN2((uintx)reasonable_minimum, InitialHeapSize));
1838 1838 if (PrintGCDetails && Verbose) {
1839 1839 // Cannot use gclog_or_tty yet.
1840 1840 tty->print_cr(" Minimum heap size " SIZE_FORMAT, min_heap_size());
1841 1841 }
1842 1842 }
1843 1843 }
1844 1844 }
1845 1845
1846 1846 // This must be called after ergonomics because we want bytecode rewriting
1847 1847 // if the server compiler is used, or if UseSharedSpaces is disabled.
1848 1848 void Arguments::set_bytecode_flags() {
1849 1849 // Better not attempt to store into a read-only space.
1850 1850 if (UseSharedSpaces) {
1851 1851 FLAG_SET_DEFAULT(RewriteBytecodes, false);
1852 1852 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
1853 1853 }
1854 1854
1855 1855 if (!RewriteBytecodes) {
1856 1856 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
1857 1857 }
1858 1858 }
1859 1859
1860 1860 // Aggressive optimization flags -XX:+AggressiveOpts
1861 1861 void Arguments::set_aggressive_opts_flags() {
1862 1862 #ifdef COMPILER2
1863 1863 if (AggressiveUnboxing) {
1864 1864 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1865 1865 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1866 1866 } else if (!EliminateAutoBox) {
1867 1867 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
1868 1868 AggressiveUnboxing = false;
1869 1869 }
1870 1870 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
1871 1871 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
1872 1872 } else if (!DoEscapeAnalysis) {
1873 1873 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
1874 1874 AggressiveUnboxing = false;
1875 1875 }
1876 1876 }
1877 1877 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1878 1878 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1879 1879 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1880 1880 }
1881 1881 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1882 1882 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
1883 1883 }
1884 1884
1885 1885 // Feed the cache size setting into the JDK
1886 1886 char buffer[1024];
1887 1887 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
1888 1888 add_property(buffer);
1889 1889 }
1890 1890 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
1891 1891 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
1892 1892 }
1893 1893 #endif
1894 1894
1895 1895 if (AggressiveOpts) {
1896 1896 // Sample flag setting code
1897 1897 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
1898 1898 // FLAG_SET_DEFAULT(EliminateZeroing, true);
1899 1899 // }
1900 1900 }
1901 1901 }
1902 1902
1903 1903 //===========================================================================================================
1904 1904 // Parsing of java.compiler property
1905 1905
1906 1906 void Arguments::process_java_compiler_argument(char* arg) {
1907 1907 // For backwards compatibility, Djava.compiler=NONE or ""
1908 1908 // causes us to switch to -Xint mode UNLESS -Xdebug
1909 1909 // is also specified.
1910 1910 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
1911 1911 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
1912 1912 }
1913 1913 }
1914 1914
1915 1915 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
1916 1916 _sun_java_launcher = strdup(launcher);
1917 1917 if (strcmp("gamma", _sun_java_launcher) == 0) {
1918 1918 _created_by_gamma_launcher = true;
1919 1919 }
1920 1920 }
1921 1921
1922 1922 bool Arguments::created_by_java_launcher() {
1923 1923 assert(_sun_java_launcher != NULL, "property must have value");
1924 1924 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
1925 1925 }
1926 1926
1927 1927 bool Arguments::created_by_gamma_launcher() {
1928 1928 return _created_by_gamma_launcher;
1929 1929 }
1930 1930
1931 1931 //===========================================================================================================
1932 1932 // Parsing of main arguments
1933 1933
1934 1934 bool Arguments::verify_interval(uintx val, uintx min,
1935 1935 uintx max, const char* name) {
1936 1936 // Returns true iff value is in the inclusive interval [min..max]
1937 1937 // false, otherwise.
1938 1938 if (val >= min && val <= max) {
1939 1939 return true;
1940 1940 }
1941 1941 jio_fprintf(defaultStream::error_stream(),
1942 1942 "%s of " UINTX_FORMAT " is invalid; must be between " UINTX_FORMAT
1943 1943 " and " UINTX_FORMAT "\n",
1944 1944 name, val, min, max);
1945 1945 return false;
1946 1946 }
1947 1947
1948 1948 bool Arguments::verify_min_value(intx val, intx min, const char* name) {
1949 1949 // Returns true if given value is at least specified min threshold
1950 1950 // false, otherwise.
1951 1951 if (val >= min ) {
1952 1952 return true;
1953 1953 }
1954 1954 jio_fprintf(defaultStream::error_stream(),
1955 1955 "%s of " INTX_FORMAT " is invalid; must be at least " INTX_FORMAT "\n",
1956 1956 name, val, min);
1957 1957 return false;
1958 1958 }
1959 1959
1960 1960 bool Arguments::verify_percentage(uintx value, const char* name) {
1961 1961 if (is_percentage(value)) {
1962 1962 return true;
1963 1963 }
1964 1964 jio_fprintf(defaultStream::error_stream(),
1965 1965 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n",
1966 1966 name, value);
1967 1967 return false;
1968 1968 }
1969 1969
1970 1970 // check if do gclog rotation
1971 1971 // +UseGCLogFileRotation is a must,
1972 1972 // no gc log rotation when log file not supplied or
1973 1973 // NumberOfGCLogFiles is 0
1974 1974 void check_gclog_consistency() {
1975 1975 if (UseGCLogFileRotation) {
1976 1976 if ((Arguments::gc_log_filename() == NULL) || (NumberOfGCLogFiles == 0)) {
1977 1977 jio_fprintf(defaultStream::output_stream(),
1978 1978 "To enable GC log rotation, use -Xloggc:<filename> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files>\n"
1979 1979 "where num_of_file > 0\n"
1980 1980 "GC log rotation is turned off\n");
1981 1981 UseGCLogFileRotation = false;
1982 1982 }
1983 1983 }
1984 1984
1985 1985 if (UseGCLogFileRotation && (GCLogFileSize != 0) && (GCLogFileSize < 8*K)) {
1986 1986 FLAG_SET_CMDLINE(uintx, GCLogFileSize, 8*K);
1987 1987 jio_fprintf(defaultStream::output_stream(),
1988 1988 "GCLogFileSize changed to minimum 8K\n");
1989 1989 }
1990 1990 }
1991 1991
1992 1992 // This function is called for -Xloggc:<filename>, it can be used
1993 1993 // to check if a given file name(or string) conforms to the following
1994 1994 // specification:
1995 1995 // A valid string only contains "[A-Z][a-z][0-9].-_%[p|t]"
1996 1996 // %p and %t only allowed once. We only limit usage of filename not path
1997 1997 bool is_filename_valid(const char *file_name) {
1998 1998 const char* p = file_name;
1999 1999 char file_sep = os::file_separator()[0];
2000 2000 const char* cp;
2001 2001 // skip prefix path
2002 2002 for (cp = file_name; *cp != '\0'; cp++) {
2003 2003 if (*cp == '/' || *cp == file_sep) {
2004 2004 p = cp + 1;
2005 2005 }
2006 2006 }
2007 2007
2008 2008 int count_p = 0;
2009 2009 int count_t = 0;
2010 2010 while (*p != '\0') {
2011 2011 if ((*p >= '0' && *p <= '9') ||
2012 2012 (*p >= 'A' && *p <= 'Z') ||
2013 2013 (*p >= 'a' && *p <= 'z') ||
2014 2014 *p == '-' ||
2015 2015 *p == '_' ||
2016 2016 *p == '.') {
2017 2017 p++;
2018 2018 continue;
2019 2019 }
2020 2020 if (*p == '%') {
2021 2021 if(*(p + 1) == 'p') {
2022 2022 p += 2;
2023 2023 count_p ++;
2024 2024 continue;
2025 2025 }
2026 2026 if (*(p + 1) == 't') {
2027 2027 p += 2;
2028 2028 count_t ++;
2029 2029 continue;
2030 2030 }
2031 2031 }
2032 2032 return false;
2033 2033 }
2034 2034 return count_p < 2 && count_t < 2;
2035 2035 }
2036 2036
2037 2037 bool Arguments::verify_MinHeapFreeRatio(FormatBuffer<80>& err_msg, uintx min_heap_free_ratio) {
2038 2038 if (!is_percentage(min_heap_free_ratio)) {
2039 2039 err_msg.print("MinHeapFreeRatio must have a value between 0 and 100");
2040 2040 return false;
2041 2041 }
2042 2042 if (min_heap_free_ratio > MaxHeapFreeRatio) {
2043 2043 err_msg.print("MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or "
2044 2044 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")", min_heap_free_ratio,
2045 2045 MaxHeapFreeRatio);
2046 2046 return false;
2047 2047 }
2048 2048 // This does not set the flag itself, but stores the value in a safe place for later usage.
2049 2049 _min_heap_free_ratio = min_heap_free_ratio;
2050 2050 return true;
2051 2051 }
2052 2052
2053 2053 bool Arguments::verify_MaxHeapFreeRatio(FormatBuffer<80>& err_msg, uintx max_heap_free_ratio) {
2054 2054 if (!is_percentage(max_heap_free_ratio)) {
2055 2055 err_msg.print("MaxHeapFreeRatio must have a value between 0 and 100");
2056 2056 return false;
2057 2057 }
2058 2058 if (max_heap_free_ratio < MinHeapFreeRatio) {
2059 2059 err_msg.print("MaxHeapFreeRatio (" UINTX_FORMAT ") must be greater than or "
2060 2060 "equal to MinHeapFreeRatio (" UINTX_FORMAT ")", max_heap_free_ratio,
2061 2061 MinHeapFreeRatio);
2062 2062 return false;
2063 2063 }
2064 2064 // This does not set the flag itself, but stores the value in a safe place for later usage.
2065 2065 _max_heap_free_ratio = max_heap_free_ratio;
2066 2066 return true;
2067 2067 }
2068 2068
2069 2069 // Check consistency of GC selection
2070 2070 bool Arguments::check_gc_consistency_user() {
2071 2071 check_gclog_consistency();
2072 2072 bool status = true;
2073 2073 // Ensure that the user has not selected conflicting sets
2074 2074 // of collectors. [Note: this check is merely a user convenience;
2075 2075 // collectors over-ride each other so that only a non-conflicting
2076 2076 // set is selected; however what the user gets is not what they
2077 2077 // may have expected from the combination they asked for. It's
2078 2078 // better to reduce user confusion by not allowing them to
2079 2079 // select conflicting combinations.
2080 2080 uint i = 0;
2081 2081 if (UseSerialGC) i++;
2082 2082 if (UseConcMarkSweepGC || UseParNewGC) i++;
2083 2083 if (UseParallelGC || UseParallelOldGC) i++;
2084 2084 if (UseG1GC) i++;
2085 2085 if (i > 1) {
2086 2086 jio_fprintf(defaultStream::error_stream(),
2087 2087 "Conflicting collector combinations in option list; "
2088 2088 "please refer to the release notes for the combinations "
2089 2089 "allowed\n");
2090 2090 status = false;
2091 2091 }
2092 2092 return status;
2093 2093 }
2094 2094
2095 2095 void Arguments::check_deprecated_gcs() {
2096 2096 if (UseConcMarkSweepGC && !UseParNewGC) {
2097 2097 warning("Using the DefNew young collector with the CMS collector is deprecated "
2098 2098 "and will likely be removed in a future release");
2099 2099 }
2100 2100
2101 2101 if (UseParNewGC && !UseConcMarkSweepGC) {
2102 2102 // !UseConcMarkSweepGC means that we are using serial old gc. Unfortunately we don't
2103 2103 // set up UseSerialGC properly, so that can't be used in the check here.
2104 2104 warning("Using the ParNew young collector with the Serial old collector is deprecated "
2105 2105 "and will likely be removed in a future release");
2106 2106 }
2107 2107
2108 2108 if (CMSIncrementalMode) {
2109 2109 warning("Using incremental CMS is deprecated and will likely be removed in a future release");
2110 2110 }
2111 2111 }
2112 2112
2113 2113 void Arguments::check_deprecated_gc_flags() {
2114 2114 if (FLAG_IS_CMDLINE(MaxGCMinorPauseMillis)) {
2115 2115 warning("Using MaxGCMinorPauseMillis as minor pause goal is deprecated"
2116 2116 "and will likely be removed in future release");
2117 2117 }
2118 2118 if (FLAG_IS_CMDLINE(DefaultMaxRAMFraction)) {
2119 2119 warning("DefaultMaxRAMFraction is deprecated and will likely be removed in a future release. "
2120 2120 "Use MaxRAMFraction instead.");
2121 2121 }
2122 2122 if (FLAG_IS_CMDLINE(UseCMSCompactAtFullCollection)) {
2123 2123 warning("UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release.");
2124 2124 }
2125 2125 if (FLAG_IS_CMDLINE(CMSFullGCsBeforeCompaction)) {
2126 2126 warning("CMSFullGCsBeforeCompaction is deprecated and will likely be removed in a future release.");
2127 2127 }
2128 2128 if (FLAG_IS_CMDLINE(UseCMSCollectionPassing)) {
2129 2129 warning("UseCMSCollectionPassing is deprecated and will likely be removed in a future release.");
2130 2130 }
2131 2131 }
2132 2132
2133 2133 // Check stack pages settings
2134 2134 bool Arguments::check_stack_pages()
2135 2135 {
2136 2136 bool status = true;
2137 2137 status = status && verify_min_value(StackYellowPages, 1, "StackYellowPages");
2138 2138 status = status && verify_min_value(StackRedPages, 1, "StackRedPages");
2139 2139 // greater stack shadow pages can't generate instruction to bang stack
2140 2140 status = status && verify_interval(StackShadowPages, 1, 50, "StackShadowPages");
2141 2141 return status;
2142 2142 }
2143 2143
2144 2144 // Check the consistency of vm_init_args
2145 2145 bool Arguments::check_vm_args_consistency() {
2146 2146 // Method for adding checks for flag consistency.
2147 2147 // The intent is to warn the user of all possible conflicts,
2148 2148 // before returning an error.
2149 2149 // Note: Needs platform-dependent factoring.
2150 2150 bool status = true;
2151 2151
2152 2152 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product
2153 2153 // builds so the cost of stack banging can be measured.
2154 2154 #if (defined(PRODUCT) && defined(SOLARIS))
2155 2155 if (!UseBoundThreads && !UseStackBanging) {
2156 2156 jio_fprintf(defaultStream::error_stream(),
2157 2157 "-UseStackBanging conflicts with -UseBoundThreads\n");
2158 2158
2159 2159 status = false;
2160 2160 }
2161 2161 #endif
2162 2162
2163 2163 if (TLABRefillWasteFraction == 0) {
2164 2164 jio_fprintf(defaultStream::error_stream(),
2165 2165 "TLABRefillWasteFraction should be a denominator, "
2166 2166 "not " SIZE_FORMAT "\n",
2167 2167 TLABRefillWasteFraction);
2168 2168 status = false;
2169 2169 }
2170 2170
2171 2171 status = status && verify_interval(AdaptiveSizePolicyWeight, 0, 100,
2172 2172 "AdaptiveSizePolicyWeight");
2173 2173 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance");
2174 2174
2175 2175 // Divide by bucket size to prevent a large size from causing rollover when
2176 2176 // calculating amount of memory needed to be allocated for the String table.
2177 2177 status = status && verify_interval(StringTableSize, minimumStringTableSize,
2178 2178 (max_uintx / StringTable::bucket_size()), "StringTable size");
2179 2179
2180 2180 status = status && verify_interval(SymbolTableSize, minimumSymbolTableSize,
2181 2181 (max_uintx / SymbolTable::bucket_size()), "SymbolTable size");
2182 2182
2183 2183 {
2184 2184 // Using "else if" below to avoid printing two error messages if min > max.
2185 2185 // This will also prevent us from reporting both min>100 and max>100 at the
2186 2186 // same time, but that is less annoying than printing two identical errors IMHO.
2187 2187 FormatBuffer<80> err_msg("%s","");
2188 2188 if (!verify_MinHeapFreeRatio(err_msg, MinHeapFreeRatio)) {
2189 2189 jio_fprintf(defaultStream::error_stream(), "%s\n", err_msg.buffer());
2190 2190 status = false;
2191 2191 } else if (!verify_MaxHeapFreeRatio(err_msg, MaxHeapFreeRatio)) {
2192 2192 jio_fprintf(defaultStream::error_stream(), "%s\n", err_msg.buffer());
2193 2193 status = false;
2194 2194 }
2195 2195 }
2196 2196
2197 2197 // Min/MaxMetaspaceFreeRatio
2198 2198 status = status && verify_percentage(MinMetaspaceFreeRatio, "MinMetaspaceFreeRatio");
2199 2199 status = status && verify_percentage(MaxMetaspaceFreeRatio, "MaxMetaspaceFreeRatio");
2200 2200
2201 2201 if (MinMetaspaceFreeRatio > MaxMetaspaceFreeRatio) {
2202 2202 jio_fprintf(defaultStream::error_stream(),
2203 2203 "MinMetaspaceFreeRatio (%s" UINTX_FORMAT ") must be less than or "
2204 2204 "equal to MaxMetaspaceFreeRatio (%s" UINTX_FORMAT ")\n",
2205 2205 FLAG_IS_DEFAULT(MinMetaspaceFreeRatio) ? "Default: " : "",
2206 2206 MinMetaspaceFreeRatio,
2207 2207 FLAG_IS_DEFAULT(MaxMetaspaceFreeRatio) ? "Default: " : "",
2208 2208 MaxMetaspaceFreeRatio);
2209 2209 status = false;
2210 2210 }
2211 2211
2212 2212 // Trying to keep 100% free is not practical
2213 2213 MinMetaspaceFreeRatio = MIN2(MinMetaspaceFreeRatio, (uintx) 99);
2214 2214
2215 2215 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
2216 2216 MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
2217 2217 }
2218 2218
2219 2219 if (UseParallelOldGC && ParallelOldGCSplitALot) {
2220 2220 // Settings to encourage splitting.
2221 2221 if (!FLAG_IS_CMDLINE(NewRatio)) {
2222 2222 FLAG_SET_CMDLINE(uintx, NewRatio, 2);
2223 2223 }
2224 2224 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) {
2225 2225 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false);
2226 2226 }
2227 2227 }
2228 2228
2229 2229 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit");
2230 2230 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit");
2231 2231 if (GCTimeLimit == 100) {
2232 2232 // Turn off gc-overhead-limit-exceeded checks
2233 2233 FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
2234 2234 }
2235 2235
2236 2236 status = status && ArgumentsExt::check_gc_consistency_user();
2237 2237 status = status && check_stack_pages();
2238 2238
2239 2239 if (CMSIncrementalMode) {
2240 2240 if (!UseConcMarkSweepGC) {
2241 2241 jio_fprintf(defaultStream::error_stream(),
2242 2242 "error: invalid argument combination.\n"
2243 2243 "The CMS collector (-XX:+UseConcMarkSweepGC) must be "
2244 2244 "selected in order\nto use CMSIncrementalMode.\n");
2245 2245 status = false;
2246 2246 } else {
2247 2247 status = status && verify_percentage(CMSIncrementalDutyCycle,
2248 2248 "CMSIncrementalDutyCycle");
2249 2249 status = status && verify_percentage(CMSIncrementalDutyCycleMin,
2250 2250 "CMSIncrementalDutyCycleMin");
2251 2251 status = status && verify_percentage(CMSIncrementalSafetyFactor,
2252 2252 "CMSIncrementalSafetyFactor");
2253 2253 status = status && verify_percentage(CMSIncrementalOffset,
2254 2254 "CMSIncrementalOffset");
2255 2255 status = status && verify_percentage(CMSExpAvgFactor,
2256 2256 "CMSExpAvgFactor");
2257 2257 // If it was not set on the command line, set
2258 2258 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early.
2259 2259 if (CMSInitiatingOccupancyFraction < 0) {
2260 2260 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1);
2261 2261 }
2262 2262 }
2263 2263 }
2264 2264
2265 2265 // CMS space iteration, which FLSVerifyAllHeapreferences entails,
2266 2266 // insists that we hold the requisite locks so that the iteration is
2267 2267 // MT-safe. For the verification at start-up and shut-down, we don't
2268 2268 // yet have a good way of acquiring and releasing these locks,
2269 2269 // which are not visible at the CollectedHeap level. We want to
2270 2270 // be able to acquire these locks and then do the iteration rather
2271 2271 // than just disable the lock verification. This will be fixed under
2272 2272 // bug 4788986.
2273 2273 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
2274 2274 if (VerifyDuringStartup) {
2275 2275 warning("Heap verification at start-up disabled "
2276 2276 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2277 2277 VerifyDuringStartup = false; // Disable verification at start-up
2278 2278 }
2279 2279
2280 2280 if (VerifyBeforeExit) {
2281 2281 warning("Heap verification at shutdown disabled "
2282 2282 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2283 2283 VerifyBeforeExit = false; // Disable verification at shutdown
2284 2284 }
2285 2285 }
2286 2286
2287 2287 // Note: only executed in non-PRODUCT mode
2288 2288 if (!UseAsyncConcMarkSweepGC &&
2289 2289 (ExplicitGCInvokesConcurrent ||
2290 2290 ExplicitGCInvokesConcurrentAndUnloadsClasses)) {
2291 2291 jio_fprintf(defaultStream::error_stream(),
2292 2292 "error: +ExplicitGCInvokesConcurrent[AndUnloadsClasses] conflicts"
2293 2293 " with -UseAsyncConcMarkSweepGC");
2294 2294 status = false;
2295 2295 }
2296 2296
2297 2297 status = status && verify_min_value(ParGCArrayScanChunk, 1, "ParGCArrayScanChunk");
2298 2298
2299 2299 #if INCLUDE_ALL_GCS
2300 2300 if (UseG1GC) {
2301 2301 status = status && verify_percentage(G1NewSizePercent, "G1NewSizePercent");
2302 2302 status = status && verify_percentage(G1MaxNewSizePercent, "G1MaxNewSizePercent");
2303 2303 status = status && verify_interval(G1NewSizePercent, 0, G1MaxNewSizePercent, "G1NewSizePercent");
2304 2304
2305 2305 status = status && verify_percentage(InitiatingHeapOccupancyPercent,
2306 2306 "InitiatingHeapOccupancyPercent");
2307 2307 status = status && verify_min_value(G1RefProcDrainInterval, 1,
2308 2308 "G1RefProcDrainInterval");
2309 2309 status = status && verify_min_value((intx)G1ConcMarkStepDurationMillis, 1,
2310 2310 "G1ConcMarkStepDurationMillis");
2311 2311 status = status && verify_interval(G1ConcRSHotCardLimit, 0, max_jubyte,
2312 2312 "G1ConcRSHotCardLimit");
2313 2313 status = status && verify_interval(G1ConcRSLogCacheSize, 0, 31,
2314 2314 "G1ConcRSLogCacheSize");
2315 2315 status = status && verify_interval(StringDeduplicationAgeThreshold, 1, markOopDesc::max_age,
2316 2316 "StringDeduplicationAgeThreshold");
2317 2317 }
2318 2318 if (UseConcMarkSweepGC) {
2319 2319 status = status && verify_min_value(CMSOldPLABNumRefills, 1, "CMSOldPLABNumRefills");
2320 2320 status = status && verify_min_value(CMSOldPLABToleranceFactor, 1, "CMSOldPLABToleranceFactor");
2321 2321 status = status && verify_min_value(CMSOldPLABMax, 1, "CMSOldPLABMax");
2322 2322 status = status && verify_interval(CMSOldPLABMin, 1, CMSOldPLABMax, "CMSOldPLABMin");
2323 2323
2324 2324 status = status && verify_min_value(CMSYoungGenPerWorker, 1, "CMSYoungGenPerWorker");
2325 2325
2326 2326 status = status && verify_min_value(CMSSamplingGrain, 1, "CMSSamplingGrain");
2327 2327 status = status && verify_interval(CMS_SweepWeight, 0, 100, "CMS_SweepWeight");
2328 2328 status = status && verify_interval(CMS_FLSWeight, 0, 100, "CMS_FLSWeight");
2329 2329
2330 2330 status = status && verify_interval(FLSCoalescePolicy, 0, 4, "FLSCoalescePolicy");
2331 2331
2332 2332 status = status && verify_min_value(CMSRescanMultiple, 1, "CMSRescanMultiple");
2333 2333 status = status && verify_min_value(CMSConcMarkMultiple, 1, "CMSConcMarkMultiple");
2334 2334
2335 2335 status = status && verify_interval(CMSPrecleanIter, 0, 9, "CMSPrecleanIter");
2336 2336 status = status && verify_min_value(CMSPrecleanDenominator, 1, "CMSPrecleanDenominator");
2337 2337 status = status && verify_interval(CMSPrecleanNumerator, 0, CMSPrecleanDenominator - 1, "CMSPrecleanNumerator");
2338 2338
2339 2339 status = status && verify_percentage(CMSBootstrapOccupancy, "CMSBootstrapOccupancy");
2340 2340
2341 2341 status = status && verify_min_value(CMSPrecleanThreshold, 100, "CMSPrecleanThreshold");
2342 2342
2343 2343 status = status && verify_percentage(CMSScheduleRemarkEdenPenetration, "CMSScheduleRemarkEdenPenetration");
2344 2344 status = status && verify_min_value(CMSScheduleRemarkSamplingRatio, 1, "CMSScheduleRemarkSamplingRatio");
2345 2345 status = status && verify_min_value(CMSBitMapYieldQuantum, 1, "CMSBitMapYieldQuantum");
2346 2346 status = status && verify_percentage(CMSTriggerRatio, "CMSTriggerRatio");
2347 2347 status = status && verify_percentage(CMSIsTooFullPercentage, "CMSIsTooFullPercentage");
2348 2348 }
2349 2349
2350 2350 if (UseParallelGC || UseParallelOldGC) {
2351 2351 status = status && verify_interval(ParallelOldDeadWoodLimiterMean, 0, 100, "ParallelOldDeadWoodLimiterMean");
2352 2352 status = status && verify_interval(ParallelOldDeadWoodLimiterStdDev, 0, 100, "ParallelOldDeadWoodLimiterStdDev");
2353 2353
2354 2354 status = status && verify_percentage(YoungGenerationSizeIncrement, "YoungGenerationSizeIncrement");
2355 2355 status = status && verify_percentage(TenuredGenerationSizeIncrement, "TenuredGenerationSizeIncrement");
2356 2356
2357 2357 status = status && verify_min_value(YoungGenerationSizeSupplementDecay, 1, "YoungGenerationSizeSupplementDecay");
2358 2358 status = status && verify_min_value(TenuredGenerationSizeSupplementDecay, 1, "TenuredGenerationSizeSupplementDecay");
2359 2359
2360 2360 status = status && verify_min_value(ParGCCardsPerStrideChunk, 1, "ParGCCardsPerStrideChunk");
2361 2361
2362 2362 status = status && verify_min_value(ParallelOldGCSplitInterval, 0, "ParallelOldGCSplitInterval");
2363 2363 }
2364 2364 #endif // INCLUDE_ALL_GCS
2365 2365
2366 2366 status = status && verify_interval(RefDiscoveryPolicy,
2367 2367 ReferenceProcessor::DiscoveryPolicyMin,
2368 2368 ReferenceProcessor::DiscoveryPolicyMax,
2369 2369 "RefDiscoveryPolicy");
2370 2370
2371 2371 // Limit the lower bound of this flag to 1 as it is used in a division
2372 2372 // expression.
2373 2373 status = status && verify_interval(TLABWasteTargetPercent,
2374 2374 1, 100, "TLABWasteTargetPercent");
2375 2375
2376 2376 status = status && verify_object_alignment();
2377 2377
2378 2378 status = status && verify_interval(CompressedClassSpaceSize, 1*M, 3*G,
2379 2379 "CompressedClassSpaceSize");
2380 2380
2381 2381 status = status && verify_interval(MarkStackSizeMax,
2382 2382 1, (max_jint - 1), "MarkStackSizeMax");
2383 2383 status = status && verify_interval(NUMAChunkResizeWeight, 0, 100, "NUMAChunkResizeWeight");
2384 2384
2385 2385 status = status && verify_min_value(LogEventsBufferEntries, 1, "LogEventsBufferEntries");
2386 2386
2387 2387 status = status && verify_min_value(HeapSizePerGCThread, (uintx) os::vm_page_size(), "HeapSizePerGCThread");
2388 2388
2389 2389 status = status && verify_min_value(GCTaskTimeStampEntries, 1, "GCTaskTimeStampEntries");
2390 2390
2391 2391 status = status && verify_percentage(ParallelGCBufferWastePct, "ParallelGCBufferWastePct");
2392 2392 status = status && verify_interval(TargetPLABWastePct, 1, 100, "TargetPLABWastePct");
2393 2393
2394 2394 status = status && verify_min_value(ParGCStridesPerThread, 1, "ParGCStridesPerThread");
2395 2395
2396 2396 status = status && verify_min_value(MinRAMFraction, 1, "MinRAMFraction");
2397 2397 status = status && verify_min_value(InitialRAMFraction, 1, "InitialRAMFraction");
2398 2398 status = status && verify_min_value(MaxRAMFraction, 1, "MaxRAMFraction");
2399 2399 status = status && verify_min_value(DefaultMaxRAMFraction, 1, "DefaultMaxRAMFraction");
2400 2400
2401 2401 status = status && verify_interval(AdaptiveTimeWeight, 0, 100, "AdaptiveTimeWeight");
2402 2402 status = status && verify_min_value(AdaptiveSizeDecrementScaleFactor, 1, "AdaptiveSizeDecrementScaleFactor");
2403 2403
2404 2404 status = status && verify_interval(TLABAllocationWeight, 0, 100, "TLABAllocationWeight");
2405 2405 status = status && verify_min_value(MinTLABSize, 1, "MinTLABSize");
2406 2406 status = status && verify_min_value(TLABRefillWasteFraction, 1, "TLABRefillWasteFraction");
2407 2407
2408 2408 status = status && verify_percentage(YoungGenerationSizeSupplement, "YoungGenerationSizeSupplement");
2409 2409 status = status && verify_percentage(TenuredGenerationSizeSupplement, "TenuredGenerationSizeSupplement");
2410 2410
2411 2411 // the "age" field in the oop header is 4 bits; do not want to pull in markOop.hpp
2412 2412 // just for that, so hardcode here.
2413 2413 status = status && verify_interval(MaxTenuringThreshold, 0, 15, "MaxTenuringThreshold");
2414 2414 status = status && verify_interval(InitialTenuringThreshold, 0, MaxTenuringThreshold, "MaxTenuringThreshold");
2415 2415 status = status && verify_percentage(TargetSurvivorRatio, "TargetSurvivorRatio");
2416 2416 status = status && verify_percentage(MarkSweepDeadRatio, "MarkSweepDeadRatio");
2417 2417
2418 2418 status = status && verify_min_value(MarkSweepAlwaysCompactCount, 1, "MarkSweepAlwaysCompactCount");
2419 2419 #ifdef COMPILER1
2420 2420 status = status && verify_min_value(ValueMapInitialSize, 1, "ValueMapInitialSize");
2421 2421 #endif
2422 2422
2423 2423 if (PrintNMTStatistics) {
2424 2424 #if INCLUDE_NMT
2425 2425 if (MemTracker::tracking_level() == NMT_off) {
2426 2426 #endif // INCLUDE_NMT
2427 2427 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2428 2428 PrintNMTStatistics = false;
2429 2429 #if INCLUDE_NMT
2430 2430 }
2431 2431 #endif
2432 2432 }
2433 2433
2434 2434 // Need to limit the extent of the padding to reasonable size.
2435 2435 // 8K is well beyond the reasonable HW cache line size, even with the
2436 2436 // aggressive prefetching, while still leaving the room for segregating
2437 2437 // among the distinct pages.
2438 2438 if (ContendedPaddingWidth < 0 || ContendedPaddingWidth > 8192) {
2439 2439 jio_fprintf(defaultStream::error_stream(),
2440 2440 "ContendedPaddingWidth=" INTX_FORMAT " must be in between %d and %d\n",
2441 2441 ContendedPaddingWidth, 0, 8192);
2442 2442 status = false;
2443 2443 }
2444 2444
2445 2445 // Need to enforce the padding not to break the existing field alignments.
2446 2446 // It is sufficient to check against the largest type size.
2447 2447 if ((ContendedPaddingWidth % BytesPerLong) != 0) {
2448 2448 jio_fprintf(defaultStream::error_stream(),
2449 2449 "ContendedPaddingWidth=" INTX_FORMAT " must be a multiple of %d\n",
2450 2450 ContendedPaddingWidth, BytesPerLong);
2451 2451 status = false;
2452 2452 }
2453 2453
2454 2454 // Check lower bounds of the code cache
2455 2455 // Template Interpreter code is approximately 3X larger in debug builds.
2456 2456 uint min_code_cache_size = (CodeCacheMinimumUseSpace DEBUG_ONLY(* 3)) + CodeCacheMinimumFreeSpace;
2457 2457 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) {
2458 2458 jio_fprintf(defaultStream::error_stream(),
2459 2459 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K,
2460 2460 os::vm_page_size()/K);
2461 2461 status = false;
2462 2462 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2463 2463 jio_fprintf(defaultStream::error_stream(),
2464 2464 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2465 2465 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2466 2466 status = false;
2467 2467 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2468 2468 jio_fprintf(defaultStream::error_stream(),
2469 2469 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2470 2470 min_code_cache_size/K);
2471 2471 status = false;
2472 2472 } else if (ReservedCodeCacheSize > 2*G) {
2473 2473 // Code cache size larger than MAXINT is not supported.
2474 2474 jio_fprintf(defaultStream::error_stream(),
2475 2475 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2476 2476 (2*G)/M);
2477 2477 status = false;
2478 2478 }
2479 2479
2480 2480 status &= verify_interval(NmethodSweepFraction, 1, ReservedCodeCacheSize/K, "NmethodSweepFraction");
2481 2481 status &= verify_interval(NmethodSweepActivity, 0, 2000, "NmethodSweepActivity");
2482 2482
2483 2483 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2484 2484 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2485 2485 }
2486 2486
2487 2487 #ifdef COMPILER1
2488 2488 status &= verify_interval(SafepointPollOffset, 0, os::vm_page_size() - BytesPerWord, "SafepointPollOffset");
2489 2489 #endif
2490 2490
2491 2491 int min_number_of_compiler_threads = get_min_number_of_compiler_threads();
2492 2492 // The default CICompilerCount's value is CI_COMPILER_COUNT.
2493 2493 assert(min_number_of_compiler_threads <= CI_COMPILER_COUNT, "minimum should be less or equal default number");
2494 2494 // Check the minimum number of compiler threads
2495 2495 status &=verify_min_value(CICompilerCount, min_number_of_compiler_threads, "CICompilerCount");
2496 2496
2497 2497 return status;
2498 2498 }
2499 2499
2500 2500 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2501 2501 const char* option_type) {
2502 2502 if (ignore) return false;
2503 2503
2504 2504 const char* spacer = " ";
2505 2505 if (option_type == NULL) {
2506 2506 option_type = ++spacer; // Set both to the empty string.
2507 2507 }
2508 2508
2509 2509 if (os::obsolete_option(option)) {
2510 2510 jio_fprintf(defaultStream::error_stream(),
2511 2511 "Obsolete %s%soption: %s\n", option_type, spacer,
2512 2512 option->optionString);
2513 2513 return false;
2514 2514 } else {
2515 2515 jio_fprintf(defaultStream::error_stream(),
2516 2516 "Unrecognized %s%soption: %s\n", option_type, spacer,
2517 2517 option->optionString);
2518 2518 return true;
2519 2519 }
2520 2520 }
2521 2521
2522 2522 static const char* user_assertion_options[] = {
2523 2523 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2524 2524 };
2525 2525
2526 2526 static const char* system_assertion_options[] = {
2527 2527 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2528 2528 };
2529 2529
2530 2530 // Return true if any of the strings in null-terminated array 'names' matches.
2531 2531 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
2532 2532 // the option must match exactly.
2533 2533 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
2534 2534 bool tail_allowed) {
2535 2535 for (/* empty */; *names != NULL; ++names) {
2536 2536 if (match_option(option, *names, tail)) {
2537 2537 if (**tail == '\0' || tail_allowed && **tail == ':') {
2538 2538 return true;
2539 2539 }
2540 2540 }
2541 2541 }
2542 2542 return false;
2543 2543 }
2544 2544
2545 2545 bool Arguments::parse_uintx(const char* value,
2546 2546 uintx* uintx_arg,
2547 2547 uintx min_size) {
2548 2548
2549 2549 // Check the sign first since atomull() parses only unsigned values.
2550 2550 bool value_is_positive = !(*value == '-');
2551 2551
2552 2552 if (value_is_positive) {
2553 2553 julong n;
2554 2554 bool good_return = atomull(value, &n);
2555 2555 if (good_return) {
2556 2556 bool above_minimum = n >= min_size;
2557 2557 bool value_is_too_large = n > max_uintx;
2558 2558
2559 2559 if (above_minimum && !value_is_too_large) {
2560 2560 *uintx_arg = n;
2561 2561 return true;
2562 2562 }
2563 2563 }
2564 2564 }
2565 2565 return false;
2566 2566 }
2567 2567
2568 2568 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2569 2569 julong* long_arg,
2570 2570 julong min_size) {
2571 2571 if (!atomull(s, long_arg)) return arg_unreadable;
2572 2572 return check_memory_size(*long_arg, min_size);
2573 2573 }
2574 2574
2575 2575 // Parse JavaVMInitArgs structure
2576 2576
2577 2577 jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) {
2578 2578 // For components of the system classpath.
2579 2579 SysClassPath scp(Arguments::get_sysclasspath());
2580 2580 bool scp_assembly_required = false;
2581 2581
2582 2582 // Save default settings for some mode flags
2583 2583 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2584 2584 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2585 2585 Arguments::_ClipInlining = ClipInlining;
2586 2586 Arguments::_BackgroundCompilation = BackgroundCompilation;
2587 2587
2588 2588 // Setup flags for mixed which is the default
2589 2589 set_mode_flags(_mixed);
2590 2590
2591 2591 // Parse JAVA_TOOL_OPTIONS environment variable (if present)
2592 2592 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required);
2593 2593 if (result != JNI_OK) {
2594 2594 return result;
2595 2595 }
2596 2596
2597 2597 // Parse JavaVMInitArgs structure passed in
2598 2598 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, Flag::COMMAND_LINE);
2599 2599 if (result != JNI_OK) {
2600 2600 return result;
2601 2601 }
2602 2602
2603 2603 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM)
2604 2604 result = parse_java_options_environment_variable(&scp, &scp_assembly_required);
2605 2605 if (result != JNI_OK) {
2606 2606 return result;
2607 2607 }
2608 2608
2609 2609 // Do final processing now that all arguments have been parsed
2610 2610 result = finalize_vm_init_args(&scp, scp_assembly_required);
2611 2611 if (result != JNI_OK) {
2612 2612 return result;
2613 2613 }
2614 2614
2615 2615 return JNI_OK;
2616 2616 }
2617 2617
2618 2618 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2619 2619 // represents a valid HPROF of JDWP agent. is_path==true denotes that we
2620 2620 // are dealing with -agentpath (case where name is a path), otherwise with
2621 2621 // -agentlib
2622 2622 bool valid_hprof_or_jdwp_agent(char *name, bool is_path) {
2623 2623 char *_name;
2624 2624 const char *_hprof = "hprof", *_jdwp = "jdwp";
2625 2625 size_t _len_hprof, _len_jdwp, _len_prefix;
2626 2626
2627 2627 if (is_path) {
2628 2628 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2629 2629 return false;
2630 2630 }
2631 2631
2632 2632 _name++; // skip past last path separator
2633 2633 _len_prefix = strlen(JNI_LIB_PREFIX);
2634 2634
2635 2635 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2636 2636 return false;
2637 2637 }
2638 2638
2639 2639 _name += _len_prefix;
2640 2640 _len_hprof = strlen(_hprof);
2641 2641 _len_jdwp = strlen(_jdwp);
2642 2642
2643 2643 if (strncmp(_name, _hprof, _len_hprof) == 0) {
2644 2644 _name += _len_hprof;
2645 2645 }
2646 2646 else if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2647 2647 _name += _len_jdwp;
2648 2648 }
2649 2649 else {
2650 2650 return false;
2651 2651 }
2652 2652
2653 2653 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2654 2654 return false;
2655 2655 }
2656 2656
2657 2657 return true;
2658 2658 }
2659 2659
2660 2660 if (strcmp(name, _hprof) == 0 || strcmp(name, _jdwp) == 0) {
2661 2661 return true;
2662 2662 }
2663 2663
2664 2664 return false;
2665 2665 }
2666 2666
2667 2667 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args,
2668 2668 SysClassPath* scp_p,
2669 2669 bool* scp_assembly_required_p,
2670 2670 Flag::Flags origin) {
2671 2671 // Remaining part of option string
2672 2672 const char* tail;
2673 2673
2674 2674 // iterate over arguments
2675 2675 for (int index = 0; index < args->nOptions; index++) {
2676 2676 bool is_absolute_path = false; // for -agentpath vs -agentlib
2677 2677
2678 2678 const JavaVMOption* option = args->options + index;
2679 2679
2680 2680 if (!match_option(option, "-Djava.class.path", &tail) &&
2681 2681 !match_option(option, "-Dsun.java.command", &tail) &&
2682 2682 !match_option(option, "-Dsun.java.launcher", &tail)) {
2683 2683
2684 2684 // add all jvm options to the jvm_args string. This string
2685 2685 // is used later to set the java.vm.args PerfData string constant.
2686 2686 // the -Djava.class.path and the -Dsun.java.command options are
2687 2687 // omitted from jvm_args string as each have their own PerfData
2688 2688 // string constant object.
2689 2689 build_jvm_args(option->optionString);
2690 2690 }
2691 2691
2692 2692 // -verbose:[class/gc/jni]
2693 2693 if (match_option(option, "-verbose", &tail)) {
2694 2694 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2695 2695 FLAG_SET_CMDLINE(bool, TraceClassLoading, true);
2696 2696 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true);
2697 2697 } else if (!strcmp(tail, ":gc")) {
2698 2698 FLAG_SET_CMDLINE(bool, PrintGC, true);
2699 2699 } else if (!strcmp(tail, ":jni")) {
2700 2700 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true);
2701 2701 }
2702 2702 // -da / -ea / -disableassertions / -enableassertions
2703 2703 // These accept an optional class/package name separated by a colon, e.g.,
2704 2704 // -da:java.lang.Thread.
2705 2705 } else if (match_option(option, user_assertion_options, &tail, true)) {
2706 2706 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2707 2707 if (*tail == '\0') {
2708 2708 JavaAssertions::setUserClassDefault(enable);
2709 2709 } else {
2710 2710 assert(*tail == ':', "bogus match by match_option()");
2711 2711 JavaAssertions::addOption(tail + 1, enable);
2712 2712 }
2713 2713 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2714 2714 } else if (match_option(option, system_assertion_options, &tail, false)) {
2715 2715 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2716 2716 JavaAssertions::setSystemClassDefault(enable);
2717 2717 // -bootclasspath:
2718 2718 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2719 2719 scp_p->reset_path(tail);
2720 2720 *scp_assembly_required_p = true;
2721 2721 // -bootclasspath/a:
2722 2722 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2723 2723 scp_p->add_suffix(tail);
2724 2724 *scp_assembly_required_p = true;
2725 2725 // -bootclasspath/p:
2726 2726 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2727 2727 scp_p->add_prefix(tail);
2728 2728 *scp_assembly_required_p = true;
2729 2729 // -Xrun
2730 2730 } else if (match_option(option, "-Xrun", &tail)) {
2731 2731 if (tail != NULL) {
2732 2732 const char* pos = strchr(tail, ':');
2733 2733 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2734 2734 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2735 2735 name[len] = '\0';
2736 2736
2737 2737 char *options = NULL;
2738 2738 if(pos != NULL) {
2739 2739 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2740 2740 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), pos+1, len2);
2741 2741 }
2742 2742 #if !INCLUDE_JVMTI
2743 2743 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) {
2744 2744 jio_fprintf(defaultStream::error_stream(),
2745 2745 "Profiling and debugging agents are not supported in this VM\n");
2746 2746 return JNI_ERR;
2747 2747 }
2748 2748 #endif // !INCLUDE_JVMTI
2749 2749 add_init_library(name, options);
2750 2750 }
2751 2751 // -agentlib and -agentpath
2752 2752 } else if (match_option(option, "-agentlib:", &tail) ||
2753 2753 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2754 2754 if(tail != NULL) {
2755 2755 const char* pos = strchr(tail, '=');
2756 2756 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2757 2757 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2758 2758 name[len] = '\0';
2759 2759
2760 2760 char *options = NULL;
2761 2761 if(pos != NULL) {
2762 2762 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1, mtInternal), pos + 1);
2763 2763 }
2764 2764 #if !INCLUDE_JVMTI
2765 2765 if (valid_hprof_or_jdwp_agent(name, is_absolute_path)) {
2766 2766 jio_fprintf(defaultStream::error_stream(),
2767 2767 "Profiling and debugging agents are not supported in this VM\n");
2768 2768 return JNI_ERR;
2769 2769 }
2770 2770 #endif // !INCLUDE_JVMTI
2771 2771 add_init_agent(name, options, is_absolute_path);
2772 2772 }
2773 2773 // -javaagent
2774 2774 } else if (match_option(option, "-javaagent:", &tail)) {
2775 2775 #if !INCLUDE_JVMTI
2776 2776 jio_fprintf(defaultStream::error_stream(),
2777 2777 "Instrumentation agents are not supported in this VM\n");
2778 2778 return JNI_ERR;
2779 2779 #else
2780 2780 if(tail != NULL) {
2781 2781 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail);
2782 2782 add_init_agent("instrument", options, false);
2783 2783 }
2784 2784 #endif // !INCLUDE_JVMTI
2785 2785 // -Xnoclassgc
2786 2786 } else if (match_option(option, "-Xnoclassgc", &tail)) {
2787 2787 FLAG_SET_CMDLINE(bool, ClassUnloading, false);
2788 2788 // -Xincgc: i-CMS
2789 2789 } else if (match_option(option, "-Xincgc", &tail)) {
2790 2790 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true);
2791 2791 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true);
2792 2792 // -Xnoincgc: no i-CMS
2793 2793 } else if (match_option(option, "-Xnoincgc", &tail)) {
2794 2794 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false);
2795 2795 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false);
2796 2796 // -Xconcgc
2797 2797 } else if (match_option(option, "-Xconcgc", &tail)) {
2798 2798 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true);
2799 2799 // -Xnoconcgc
2800 2800 } else if (match_option(option, "-Xnoconcgc", &tail)) {
2801 2801 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false);
2802 2802 // -Xbatch
2803 2803 } else if (match_option(option, "-Xbatch", &tail)) {
2804 2804 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false);
2805 2805 // -Xmn for compatibility with other JVM vendors
2806 2806 } else if (match_option(option, "-Xmn", &tail)) {
2807 2807 julong long_initial_young_size = 0;
2808 2808 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2809 2809 if (errcode != arg_in_range) {
2810 2810 jio_fprintf(defaultStream::error_stream(),
2811 2811 "Invalid initial young generation size: %s\n", option->optionString);
2812 2812 describe_range_error(errcode);
2813 2813 return JNI_EINVAL;
2814 2814 }
2815 2815 FLAG_SET_CMDLINE(uintx, MaxNewSize, (uintx)long_initial_young_size);
2816 2816 FLAG_SET_CMDLINE(uintx, NewSize, (uintx)long_initial_young_size);
2817 2817 // -Xms
2818 2818 } else if (match_option(option, "-Xms", &tail)) {
2819 2819 julong long_initial_heap_size = 0;
2820 2820 // an initial heap size of 0 means automatically determine
2821 2821 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2822 2822 if (errcode != arg_in_range) {
2823 2823 jio_fprintf(defaultStream::error_stream(),
2824 2824 "Invalid initial heap size: %s\n", option->optionString);
2825 2825 describe_range_error(errcode);
2826 2826 return JNI_EINVAL;
2827 2827 }
2828 2828 set_min_heap_size((uintx)long_initial_heap_size);
2829 2829 // Currently the minimum size and the initial heap sizes are the same.
2830 2830 // Can be overridden with -XX:InitialHeapSize.
2831 2831 FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size);
2832 2832 // -Xmx
2833 2833 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2834 2834 julong long_max_heap_size = 0;
2835 2835 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2836 2836 if (errcode != arg_in_range) {
2837 2837 jio_fprintf(defaultStream::error_stream(),
2838 2838 "Invalid maximum heap size: %s\n", option->optionString);
2839 2839 describe_range_error(errcode);
2840 2840 return JNI_EINVAL;
2841 2841 }
2842 2842 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (uintx)long_max_heap_size);
2843 2843 // Xmaxf
2844 2844 } else if (match_option(option, "-Xmaxf", &tail)) {
2845 2845 char* err;
2846 2846 int maxf = (int)(strtod(tail, &err) * 100);
2847 2847 if (*err != '\0' || *tail == '\0' || maxf < 0 || maxf > 100) {
2848 2848 jio_fprintf(defaultStream::error_stream(),
2849 2849 "Bad max heap free percentage size: %s\n",
2850 2850 option->optionString);
2851 2851 return JNI_EINVAL;
2852 2852 } else {
2853 2853 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf);
2854 2854 }
2855 2855 // Xminf
2856 2856 } else if (match_option(option, "-Xminf", &tail)) {
2857 2857 char* err;
2858 2858 int minf = (int)(strtod(tail, &err) * 100);
2859 2859 if (*err != '\0' || *tail == '\0' || minf < 0 || minf > 100) {
2860 2860 jio_fprintf(defaultStream::error_stream(),
2861 2861 "Bad min heap free percentage size: %s\n",
2862 2862 option->optionString);
2863 2863 return JNI_EINVAL;
2864 2864 } else {
2865 2865 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf);
2866 2866 }
2867 2867 // -Xss
2868 2868 } else if (match_option(option, "-Xss", &tail)) {
2869 2869 julong long_ThreadStackSize = 0;
2870 2870 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000);
2871 2871 if (errcode != arg_in_range) {
2872 2872 jio_fprintf(defaultStream::error_stream(),
2873 2873 "Invalid thread stack size: %s\n", option->optionString);
2874 2874 describe_range_error(errcode);
2875 2875 return JNI_EINVAL;
2876 2876 }
2877 2877 // Internally track ThreadStackSize in units of 1024 bytes.
2878 2878 FLAG_SET_CMDLINE(intx, ThreadStackSize,
2879 2879 round_to((int)long_ThreadStackSize, K) / K);
2880 2880 // -Xoss
2881 2881 } else if (match_option(option, "-Xoss", &tail)) {
2882 2882 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility
2883 2883 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) {
2884 2884 julong long_CodeCacheExpansionSize = 0;
2885 2885 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size());
2886 2886 if (errcode != arg_in_range) {
2887 2887 jio_fprintf(defaultStream::error_stream(),
2888 2888 "Invalid argument: %s. Must be at least %luK.\n", option->optionString,
2889 2889 os::vm_page_size()/K);
2890 2890 return JNI_EINVAL;
2891 2891 }
2892 2892 FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize);
2893 2893 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2894 2894 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2895 2895 julong long_ReservedCodeCacheSize = 0;
2896 2896
2897 2897 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2898 2898 if (errcode != arg_in_range) {
2899 2899 jio_fprintf(defaultStream::error_stream(),
2900 2900 "Invalid maximum code cache size: %s.\n", option->optionString);
2901 2901 return JNI_EINVAL;
2902 2902 }
2903 2903 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize);
2904 2904 //-XX:IncreaseFirstTierCompileThresholdAt=
2905 2905 } else if (match_option(option, "-XX:IncreaseFirstTierCompileThresholdAt=", &tail)) {
2906 2906 uintx uint_IncreaseFirstTierCompileThresholdAt = 0;
2907 2907 if (!parse_uintx(tail, &uint_IncreaseFirstTierCompileThresholdAt, 0) || uint_IncreaseFirstTierCompileThresholdAt > 99) {
2908 2908 jio_fprintf(defaultStream::error_stream(),
2909 2909 "Invalid value for IncreaseFirstTierCompileThresholdAt: %s. Should be between 0 and 99.\n",
2910 2910 option->optionString);
2911 2911 return JNI_EINVAL;
2912 2912 }
2913 2913 FLAG_SET_CMDLINE(uintx, IncreaseFirstTierCompileThresholdAt, (uintx)uint_IncreaseFirstTierCompileThresholdAt);
2914 2914 // -green
2915 2915 } else if (match_option(option, "-green", &tail)) {
2916 2916 jio_fprintf(defaultStream::error_stream(),
2917 2917 "Green threads support not available\n");
2918 2918 return JNI_EINVAL;
2919 2919 // -native
2920 2920 } else if (match_option(option, "-native", &tail)) {
2921 2921 // HotSpot always uses native threads, ignore silently for compatibility
2922 2922 // -Xsqnopause
2923 2923 } else if (match_option(option, "-Xsqnopause", &tail)) {
2924 2924 // EVM option, ignore silently for compatibility
2925 2925 // -Xrs
2926 2926 } else if (match_option(option, "-Xrs", &tail)) {
2927 2927 // Classic/EVM option, new functionality
2928 2928 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true);
2929 2929 } else if (match_option(option, "-Xusealtsigs", &tail)) {
2930 2930 // change default internal VM signals used - lower case for back compat
2931 2931 FLAG_SET_CMDLINE(bool, UseAltSigs, true);
2932 2932 // -Xoptimize
2933 2933 } else if (match_option(option, "-Xoptimize", &tail)) {
2934 2934 // EVM option, ignore silently for compatibility
2935 2935 // -Xprof
2936 2936 } else if (match_option(option, "-Xprof", &tail)) {
2937 2937 #if INCLUDE_FPROF
2938 2938 _has_profile = true;
2939 2939 #else // INCLUDE_FPROF
2940 2940 jio_fprintf(defaultStream::error_stream(),
2941 2941 "Flat profiling is not supported in this VM.\n");
2942 2942 return JNI_ERR;
2943 2943 #endif // INCLUDE_FPROF
2944 2944 // -Xconcurrentio
2945 2945 } else if (match_option(option, "-Xconcurrentio", &tail)) {
2946 2946 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true);
2947 2947 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false);
2948 2948 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1);
2949 2949 FLAG_SET_CMDLINE(bool, UseTLAB, false);
2950 2950 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation
2951 2951
2952 2952 // -Xinternalversion
2953 2953 } else if (match_option(option, "-Xinternalversion", &tail)) {
2954 2954 jio_fprintf(defaultStream::output_stream(), "%s\n",
2955 2955 VM_Version::internal_vm_info_string());
2956 2956 vm_exit(0);
2957 2957 #ifndef PRODUCT
2958 2958 // -Xprintflags
2959 2959 } else if (match_option(option, "-Xprintflags", &tail)) {
2960 2960 CommandLineFlags::printFlags(tty, false);
2961 2961 vm_exit(0);
2962 2962 #endif
2963 2963 // -D
2964 2964 } else if (match_option(option, "-D", &tail)) {
2965 2965 if (!add_property(tail)) {
2966 2966 return JNI_ENOMEM;
2967 2967 }
2968 2968 // Out of the box management support
2969 2969 if (match_option(option, "-Dcom.sun.management", &tail)) {
2970 2970 #if INCLUDE_MANAGEMENT
2971 2971 FLAG_SET_CMDLINE(bool, ManagementServer, true);
2972 2972 #else
2973 2973 jio_fprintf(defaultStream::output_stream(),
2974 2974 "-Dcom.sun.management is not supported in this VM.\n");
2975 2975 return JNI_ERR;
2976 2976 #endif
2977 2977 }
2978 2978 // -Xint
2979 2979 } else if (match_option(option, "-Xint", &tail)) {
2980 2980 set_mode_flags(_int);
2981 2981 // -Xmixed
2982 2982 } else if (match_option(option, "-Xmixed", &tail)) {
2983 2983 set_mode_flags(_mixed);
2984 2984 // -Xcomp
2985 2985 } else if (match_option(option, "-Xcomp", &tail)) {
2986 2986 // for testing the compiler; turn off all flags that inhibit compilation
2987 2987 set_mode_flags(_comp);
2988 2988 // -Xshare:dump
2989 2989 } else if (match_option(option, "-Xshare:dump", &tail)) {
2990 2990 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true);
2991 2991 set_mode_flags(_int); // Prevent compilation, which creates objects
2992 2992 // -Xshare:on
2993 2993 } else if (match_option(option, "-Xshare:on", &tail)) {
2994 2994 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true);
2995 2995 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true);
2996 2996 // -Xshare:auto
2997 2997 } else if (match_option(option, "-Xshare:auto", &tail)) {
2998 2998 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true);
2999 2999 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false);
3000 3000 // -Xshare:off
3001 3001 } else if (match_option(option, "-Xshare:off", &tail)) {
3002 3002 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false);
3003 3003 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false);
3004 3004 // -Xverify
3005 3005 } else if (match_option(option, "-Xverify", &tail)) {
3006 3006 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
3007 3007 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true);
3008 3008 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true);
3009 3009 } else if (strcmp(tail, ":remote") == 0) {
3010 3010 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false);
3011 3011 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true);
3012 3012 } else if (strcmp(tail, ":none") == 0) {
3013 3013 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false);
3014 3014 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false);
3015 3015 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
3016 3016 return JNI_EINVAL;
3017 3017 }
3018 3018 // -Xdebug
3019 3019 } else if (match_option(option, "-Xdebug", &tail)) {
3020 3020 // note this flag has been used, then ignore
3021 3021 set_xdebug_mode(true);
3022 3022 // -Xnoagent
3023 3023 } else if (match_option(option, "-Xnoagent", &tail)) {
3024 3024 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
3025 3025 } else if (match_option(option, "-Xboundthreads", &tail)) {
3026 3026 // Bind user level threads to kernel threads (Solaris only)
3027 3027 FLAG_SET_CMDLINE(bool, UseBoundThreads, true);
3028 3028 } else if (match_option(option, "-Xloggc:", &tail)) {
3029 3029 // Redirect GC output to the file. -Xloggc:<filename>
3030 3030 // ostream_init_log(), when called will use this filename
3031 3031 // to initialize a fileStream.
3032 3032 _gc_log_filename = strdup(tail);
3033 3033 if (!is_filename_valid(_gc_log_filename)) {
3034 3034 jio_fprintf(defaultStream::output_stream(),
3035 3035 "Invalid file name for use with -Xloggc: Filename can only contain the "
3036 3036 "characters [A-Z][a-z][0-9]-_.%%[p|t] but it has been %s\n"
3037 3037 "Note %%p or %%t can only be used once\n", _gc_log_filename);
3038 3038 return JNI_EINVAL;
3039 3039 }
3040 3040 FLAG_SET_CMDLINE(bool, PrintGC, true);
3041 3041 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true);
3042 3042
3043 3043 // JNI hooks
3044 3044 } else if (match_option(option, "-Xcheck", &tail)) {
3045 3045 if (!strcmp(tail, ":jni")) {
3046 3046 #if !INCLUDE_JNI_CHECK
3047 3047 warning("JNI CHECKING is not supported in this VM");
3048 3048 #else
3049 3049 CheckJNICalls = true;
3050 3050 #endif // INCLUDE_JNI_CHECK
3051 3051 } else if (is_bad_option(option, args->ignoreUnrecognized,
3052 3052 "check")) {
3053 3053 return JNI_EINVAL;
3054 3054 }
3055 3055 } else if (match_option(option, "vfprintf", &tail)) {
3056 3056 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
3057 3057 } else if (match_option(option, "exit", &tail)) {
3058 3058 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
3059 3059 } else if (match_option(option, "abort", &tail)) {
3060 3060 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
3061 3061 // -XX:+AggressiveHeap
3062 3062 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) {
3063 3063
3064 3064 // This option inspects the machine and attempts to set various
3065 3065 // parameters to be optimal for long-running, memory allocation
3066 3066 // intensive jobs. It is intended for machines with large
3067 3067 // amounts of cpu and memory.
3068 3068
3069 3069 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
3070 3070 // VM, but we may not be able to represent the total physical memory
3071 3071 // available (like having 8gb of memory on a box but using a 32bit VM).
3072 3072 // Thus, we need to make sure we're using a julong for intermediate
3073 3073 // calculations.
3074 3074 julong initHeapSize;
3075 3075 julong total_memory = os::physical_memory();
3076 3076
3077 3077 if (total_memory < (julong)256*M) {
3078 3078 jio_fprintf(defaultStream::error_stream(),
3079 3079 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
3080 3080 vm_exit(1);
3081 3081 }
3082 3082
3083 3083 // The heap size is half of available memory, or (at most)
3084 3084 // all of possible memory less 160mb (leaving room for the OS
3085 3085 // when using ISM). This is the maximum; because adaptive sizing
3086 3086 // is turned on below, the actual space used may be smaller.
3087 3087
3088 3088 initHeapSize = MIN2(total_memory / (julong)2,
3089 3089 total_memory - (julong)160*M);
3090 3090
3091 3091 initHeapSize = limit_by_allocatable_memory(initHeapSize);
3092 3092
3093 3093 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
3094 3094 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize);
3095 3095 FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize);
3096 3096 // Currently the minimum size and the initial heap sizes are the same.
3097 3097 set_min_heap_size(initHeapSize);
3098 3098 }
3099 3099 if (FLAG_IS_DEFAULT(NewSize)) {
3100 3100 // Make the young generation 3/8ths of the total heap.
3101 3101 FLAG_SET_CMDLINE(uintx, NewSize,
3102 3102 ((julong)MaxHeapSize / (julong)8) * (julong)3);
3103 3103 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize);
3104 3104 }
3105 3105
3106 3106 #ifndef _ALLBSD_SOURCE // UseLargePages is not yet supported on BSD.
3107 3107 FLAG_SET_DEFAULT(UseLargePages, true);
3108 3108 #endif
3109 3109
3110 3110 // Increase some data structure sizes for efficiency
3111 3111 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize);
3112 3112 FLAG_SET_CMDLINE(bool, ResizeTLAB, false);
3113 3113 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K);
3114 3114
3115 3115 // See the OldPLABSize comment below, but replace 'after promotion'
3116 3116 // with 'after copying'. YoungPLABSize is the size of the survivor
3117 3117 // space per-gc-thread buffers. The default is 4kw.
3118 3118 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words
3119 3119
3120 3120 // OldPLABSize is the size of the buffers in the old gen that
3121 3121 // UseParallelGC uses to promote live data that doesn't fit in the
3122 3122 // survivor spaces. At any given time, there's one for each gc thread.
3123 3123 // The default size is 1kw. These buffers are rarely used, since the
3124 3124 // survivor spaces are usually big enough. For specjbb, however, there
3125 3125 // are occasions when there's lots of live data in the young gen
3126 3126 // and we end up promoting some of it. We don't have a definite
3127 3127 // explanation for why bumping OldPLABSize helps, but the theory
3128 3128 // is that a bigger PLAB results in retaining something like the
3129 3129 // original allocation order after promotion, which improves mutator
3130 3130 // locality. A minor effect may be that larger PLABs reduce the
3131 3131 // number of PLAB allocation events during gc. The value of 8kw
3132 3132 // was arrived at by experimenting with specjbb.
3133 3133 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words
3134 3134
3135 3135 // Enable parallel GC and adaptive generation sizing
3136 3136 FLAG_SET_CMDLINE(bool, UseParallelGC, true);
3137 3137 FLAG_SET_DEFAULT(ParallelGCThreads,
3138 3138 Abstract_VM_Version::parallel_worker_threads());
3139 3139
3140 3140 // Encourage steady state memory management
3141 3141 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100);
3142 3142
3143 3143 // This appears to improve mutator locality
3144 3144 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false);
3145 3145
3146 3146 // Get around early Solaris scheduling bug
3147 3147 // (affinity vs other jobs on system)
3148 3148 // but disallow DR and offlining (5008695).
3149 3149 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true);
3150 3150
3151 3151 } else if (match_option(option, "-XX:+NeverTenure", &tail)) {
3152 3152 // The last option must always win.
3153 3153 FLAG_SET_CMDLINE(bool, AlwaysTenure, false);
3154 3154 FLAG_SET_CMDLINE(bool, NeverTenure, true);
3155 3155 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) {
3156 3156 // The last option must always win.
3157 3157 FLAG_SET_CMDLINE(bool, NeverTenure, false);
3158 3158 FLAG_SET_CMDLINE(bool, AlwaysTenure, true);
3159 3159 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) ||
3160 3160 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) {
3161 3161 jio_fprintf(defaultStream::error_stream(),
3162 3162 "Please use CMSClassUnloadingEnabled in place of "
3163 3163 "CMSPermGenSweepingEnabled in the future\n");
3164 3164 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) {
3165 3165 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true);
3166 3166 jio_fprintf(defaultStream::error_stream(),
3167 3167 "Please use -XX:+UseGCOverheadLimit in place of "
3168 3168 "-XX:+UseGCTimeLimit in the future\n");
3169 3169 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) {
3170 3170 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false);
3171 3171 jio_fprintf(defaultStream::error_stream(),
3172 3172 "Please use -XX:-UseGCOverheadLimit in place of "
3173 3173 "-XX:-UseGCTimeLimit in the future\n");
3174 3174 // The TLE options are for compatibility with 1.3 and will be
3175 3175 // removed without notice in a future release. These options
3176 3176 // are not to be documented.
3177 3177 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) {
3178 3178 // No longer used.
3179 3179 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) {
3180 3180 FLAG_SET_CMDLINE(bool, ResizeTLAB, true);
3181 3181 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) {
3182 3182 FLAG_SET_CMDLINE(bool, ResizeTLAB, false);
3183 3183 } else if (match_option(option, "-XX:+PrintTLE", &tail)) {
3184 3184 FLAG_SET_CMDLINE(bool, PrintTLAB, true);
3185 3185 } else if (match_option(option, "-XX:-PrintTLE", &tail)) {
3186 3186 FLAG_SET_CMDLINE(bool, PrintTLAB, false);
3187 3187 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) {
3188 3188 // No longer used.
3189 3189 } else if (match_option(option, "-XX:TLESize=", &tail)) {
3190 3190 julong long_tlab_size = 0;
3191 3191 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1);
3192 3192 if (errcode != arg_in_range) {
3193 3193 jio_fprintf(defaultStream::error_stream(),
3194 3194 "Invalid TLAB size: %s\n", option->optionString);
3195 3195 describe_range_error(errcode);
3196 3196 return JNI_EINVAL;
3197 3197 }
3198 3198 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size);
3199 3199 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) {
3200 3200 // No longer used.
3201 3201 } else if (match_option(option, "-XX:+UseTLE", &tail)) {
3202 3202 FLAG_SET_CMDLINE(bool, UseTLAB, true);
3203 3203 } else if (match_option(option, "-XX:-UseTLE", &tail)) {
3204 3204 FLAG_SET_CMDLINE(bool, UseTLAB, false);
3205 3205 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) {
3206 3206 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false);
3207 3207 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true);
3208 3208 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) {
3209 3209 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false);
3210 3210 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true);
3211 3211 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) {
3212 3212 #if defined(DTRACE_ENABLED)
3213 3213 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true);
3214 3214 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true);
3215 3215 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true);
3216 3216 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true);
3217 3217 #else // defined(DTRACE_ENABLED)
3218 3218 jio_fprintf(defaultStream::error_stream(),
3219 3219 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3220 3220 return JNI_EINVAL;
3221 3221 #endif // defined(DTRACE_ENABLED)
3222 3222 #ifdef ASSERT
3223 3223 } else if (match_option(option, "-XX:+FullGCALot", &tail)) {
3224 3224 FLAG_SET_CMDLINE(bool, FullGCALot, true);
3225 3225 // disable scavenge before parallel mark-compact
3226 3226 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false);
3227 3227 #endif
3228 3228 } else if (match_option(option, "-XX:CMSParPromoteBlocksToClaim=", &tail)) {
3229 3229 julong cms_blocks_to_claim = (julong)atol(tail);
3230 3230 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim);
3231 3231 jio_fprintf(defaultStream::error_stream(),
3232 3232 "Please use -XX:OldPLABSize in place of "
3233 3233 "-XX:CMSParPromoteBlocksToClaim in the future\n");
3234 3234 } else if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) {
3235 3235 julong cms_blocks_to_claim = (julong)atol(tail);
3236 3236 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim);
3237 3237 jio_fprintf(defaultStream::error_stream(),
3238 3238 "Please use -XX:OldPLABSize in place of "
3239 3239 "-XX:ParCMSPromoteBlocksToClaim in the future\n");
3240 3240 } else if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) {
3241 3241 julong old_plab_size = 0;
3242 3242 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1);
3243 3243 if (errcode != arg_in_range) {
3244 3244 jio_fprintf(defaultStream::error_stream(),
3245 3245 "Invalid old PLAB size: %s\n", option->optionString);
3246 3246 describe_range_error(errcode);
3247 3247 return JNI_EINVAL;
3248 3248 }
3249 3249 FLAG_SET_CMDLINE(uintx, OldPLABSize, old_plab_size);
3250 3250 jio_fprintf(defaultStream::error_stream(),
3251 3251 "Please use -XX:OldPLABSize in place of "
3252 3252 "-XX:ParallelGCOldGenAllocBufferSize in the future\n");
3253 3253 } else if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) {
3254 3254 julong young_plab_size = 0;
3255 3255 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1);
3256 3256 if (errcode != arg_in_range) {
3257 3257 jio_fprintf(defaultStream::error_stream(),
3258 3258 "Invalid young PLAB size: %s\n", option->optionString);
3259 3259 describe_range_error(errcode);
3260 3260 return JNI_EINVAL;
3261 3261 }
3262 3262 FLAG_SET_CMDLINE(uintx, YoungPLABSize, young_plab_size);
3263 3263 jio_fprintf(defaultStream::error_stream(),
3264 3264 "Please use -XX:YoungPLABSize in place of "
3265 3265 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n");
3266 3266 } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) ||
3267 3267 match_option(option, "-XX:G1MarkStackSize=", &tail)) {
3268 3268 julong stack_size = 0;
3269 3269 ArgsRange errcode = parse_memory_size(tail, &stack_size, 1);
3270 3270 if (errcode != arg_in_range) {
3271 3271 jio_fprintf(defaultStream::error_stream(),
3272 3272 "Invalid mark stack size: %s\n", option->optionString);
3273 3273 describe_range_error(errcode);
3274 3274 return JNI_EINVAL;
3275 3275 }
3276 3276 FLAG_SET_CMDLINE(uintx, MarkStackSize, stack_size);
3277 3277 } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) {
3278 3278 julong max_stack_size = 0;
3279 3279 ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1);
3280 3280 if (errcode != arg_in_range) {
3281 3281 jio_fprintf(defaultStream::error_stream(),
3282 3282 "Invalid maximum mark stack size: %s\n",
3283 3283 option->optionString);
3284 3284 describe_range_error(errcode);
3285 3285 return JNI_EINVAL;
3286 3286 }
3287 3287 FLAG_SET_CMDLINE(uintx, MarkStackSizeMax, max_stack_size);
3288 3288 } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) ||
3289 3289 match_option(option, "-XX:ParallelCMSThreads=", &tail)) {
3290 3290 uintx conc_threads = 0;
3291 3291 if (!parse_uintx(tail, &conc_threads, 1)) {
3292 3292 jio_fprintf(defaultStream::error_stream(),
3293 3293 "Invalid concurrent threads: %s\n", option->optionString);
3294 3294 return JNI_EINVAL;
3295 3295 }
3296 3296 FLAG_SET_CMDLINE(uintx, ConcGCThreads, conc_threads);
3297 3297 } else if (match_option(option, "-XX:MaxDirectMemorySize=", &tail)) {
3298 3298 julong max_direct_memory_size = 0;
3299 3299 ArgsRange errcode = parse_memory_size(tail, &max_direct_memory_size, 0);
3300 3300 if (errcode != arg_in_range) {
3301 3301 jio_fprintf(defaultStream::error_stream(),
3302 3302 "Invalid maximum direct memory size: %s\n",
3303 3303 option->optionString);
3304 3304 describe_range_error(errcode);
3305 3305 return JNI_EINVAL;
3306 3306 }
3307 3307 FLAG_SET_CMDLINE(uintx, MaxDirectMemorySize, max_direct_memory_size);
3308 3308 } else if (match_option(option, "-XX:+UseVMInterruptibleIO", &tail)) {
3309 3309 // NOTE! In JDK 9, the UseVMInterruptibleIO flag will completely go
3310 3310 // away and will cause VM initialization failures!
3311 3311 warning("-XX:+UseVMInterruptibleIO is obsolete and will be removed in a future release.");
3312 3312 FLAG_SET_CMDLINE(bool, UseVMInterruptibleIO, true);
3313 3313 #if !INCLUDE_MANAGEMENT
3314 3314 } else if (match_option(option, "-XX:+ManagementServer", &tail)) {
3315 3315 jio_fprintf(defaultStream::error_stream(),
3316 3316 "ManagementServer is not supported in this VM.\n");
3317 3317 return JNI_ERR;
3318 3318 #endif // INCLUDE_MANAGEMENT
3319 3319 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3320 3320 // Skip -XX:Flags= since that case has already been handled
3321 3321 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) {
3322 3322 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3323 3323 return JNI_EINVAL;
3324 3324 }
3325 3325 }
3326 3326 // Unknown option
3327 3327 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3328 3328 return JNI_ERR;
3329 3329 }
3330 3330 }
3331 3331
3332 3332 // PrintSharedArchiveAndExit will turn on
3333 3333 // -Xshare:on
3334 3334 // -XX:+TraceClassPaths
3335 3335 if (PrintSharedArchiveAndExit) {
3336 3336 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true);
3337 3337 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true);
3338 3338 FLAG_SET_CMDLINE(bool, TraceClassPaths, true);
3339 3339 }
3340 3340
3341 3341 // Change the default value for flags which have different default values
3342 3342 // when working with older JDKs.
3343 3343 #ifdef LINUX
3344 3344 if (JDK_Version::current().compare_major(6) <= 0 &&
3345 3345 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3346 3346 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3347 3347 }
3348 3348 #endif // LINUX
3349 3349 fix_appclasspath();
3350 3350 return JNI_OK;
3351 3351 }
3352 3352
3353 3353 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3354 3354 //
3355 3355 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3356 3356 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3357 3357 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3358 3358 // path is treated as the current directory.
3359 3359 //
3360 3360 // This causes problems with CDS, which requires that all directories specified in the classpath
3361 3361 // must be empty. In most cases, applications do NOT want to load classes from the current
3362 3362 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3363 3363 // scripts compatible with CDS.
3364 3364 void Arguments::fix_appclasspath() {
3365 3365 if (IgnoreEmptyClassPaths) {
3366 3366 const char separator = *os::path_separator();
3367 3367 const char* src = _java_class_path->value();
3368 3368
3369 3369 // skip over all the leading empty paths
3370 3370 while (*src == separator) {
3371 3371 src ++;
3372 3372 }
3373 3373
3374 3374 char* copy = AllocateHeap(strlen(src) + 1, mtInternal);
3375 3375 strncpy(copy, src, strlen(src) + 1);
3376 3376
3377 3377 // trim all trailing empty paths
3378 3378 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3379 3379 *tail = '\0';
3380 3380 }
3381 3381
3382 3382 char from[3] = {separator, separator, '\0'};
3383 3383 char to [2] = {separator, '\0'};
3384 3384 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3385 3385 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3386 3386 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3387 3387 }
3388 3388
3389 3389 _java_class_path->set_value(copy);
3390 3390 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3391 3391 }
3392 3392
3393 3393 if (!PrintSharedArchiveAndExit) {
3394 3394 ClassLoader::trace_class_path("[classpath: ", _java_class_path->value());
3395 3395 }
3396 3396 }
3397 3397
3398 3398 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) {
3399 3399 // This must be done after all -D arguments have been processed.
3400 3400 scp_p->expand_endorsed();
3401 3401
3402 3402 if (scp_assembly_required || scp_p->get_endorsed() != NULL) {
3403 3403 // Assemble the bootclasspath elements into the final path.
3404 3404 Arguments::set_sysclasspath(scp_p->combined_path());
3405 3405 }
3406 3406
3407 3407 // This must be done after all arguments have been processed.
3408 3408 // java_compiler() true means set to "NONE" or empty.
3409 3409 if (java_compiler() && !xdebug_mode()) {
3410 3410 // For backwards compatibility, we switch to interpreted mode if
3411 3411 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3412 3412 // not specified.
3413 3413 set_mode_flags(_int);
3414 3414 }
3415 3415 if (CompileThreshold == 0) {
3416 3416 set_mode_flags(_int);
3417 3417 }
3418 3418
3419 3419 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3420 3420 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3421 3421 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3422 3422 }
3423 3423
3424 3424 #ifndef COMPILER2
3425 3425 // Don't degrade server performance for footprint
3426 3426 if (FLAG_IS_DEFAULT(UseLargePages) &&
3427 3427 MaxHeapSize < LargePageHeapSizeThreshold) {
3428 3428 // No need for large granularity pages w/small heaps.
3429 3429 // Note that large pages are enabled/disabled for both the
3430 3430 // Java heap and the code cache.
3431 3431 FLAG_SET_DEFAULT(UseLargePages, false);
3432 3432 }
3433 3433
3434 3434 #else
3435 3435 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3436 3436 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3437 3437 }
3438 3438 #endif
3439 3439
3440 3440 #ifndef TIERED
3441 3441 // Tiered compilation is undefined.
3442 3442 UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation");
3443 3443 #endif
3444 3444
3445 3445 // If we are running in a headless jre, force java.awt.headless property
3446 3446 // to be true unless the property has already been set.
3447 3447 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
3448 3448 if (os::is_headless_jre()) {
3449 3449 const char* headless = Arguments::get_property("java.awt.headless");
3450 3450 if (headless == NULL) {
3451 3451 char envbuffer[128];
3452 3452 if (!os::getenv("JAVA_AWT_HEADLESS", envbuffer, sizeof(envbuffer))) {
3453 3453 if (!add_property("java.awt.headless=true")) {
3454 3454 return JNI_ENOMEM;
3455 3455 }
3456 3456 } else {
3457 3457 char buffer[256];
3458 3458 strcpy(buffer, "java.awt.headless=");
3459 3459 strcat(buffer, envbuffer);
3460 3460 if (!add_property(buffer)) {
3461 3461 return JNI_ENOMEM;
3462 3462 }
3463 3463 }
3464 3464 }
3465 3465 }
3466 3466
3467 3467 if (!ArgumentsExt::check_vm_args_consistency()) {
3468 3468 return JNI_ERR;
3469 3469 }
3470 3470
3471 3471 return JNI_OK;
3472 3472 }
3473 3473
3474 3474 jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) {
3475 3475 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p,
3476 3476 scp_assembly_required_p);
3477 3477 }
3478 3478
3479 3479 jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) {
3480 3480 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p,
3481 3481 scp_assembly_required_p);
3482 3482 }
3483 3483
3484 3484 jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) {
3485 3485 const int N_MAX_OPTIONS = 64;
3486 3486 const int OPTION_BUFFER_SIZE = 1024;
3487 3487 char buffer[OPTION_BUFFER_SIZE];
3488 3488
3489 3489 // The variable will be ignored if it exceeds the length of the buffer.
3490 3490 // Don't check this variable if user has special privileges
3491 3491 // (e.g. unix su command).
3492 3492 if (os::getenv(name, buffer, sizeof(buffer)) &&
3493 3493 !os::have_special_privileges()) {
3494 3494 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array
3495 3495 jio_fprintf(defaultStream::error_stream(),
3496 3496 "Picked up %s: %s\n", name, buffer);
3497 3497 char* rd = buffer; // pointer to the input string (rd)
3498 3498 int i;
3499 3499 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string
3500 3500 while (isspace(*rd)) rd++; // skip whitespace
3501 3501 if (*rd == 0) break; // we re done when the input string is read completely
3502 3502
3503 3503 // The output, option string, overwrites the input string.
3504 3504 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to
3505 3505 // input string (rd).
3506 3506 char* wrt = rd;
3507 3507
3508 3508 options[i++].optionString = wrt; // Fill in option
3509 3509 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL
3510 3510 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3511 3511 int quote = *rd; // matching quote to look for
3512 3512 rd++; // don't copy open quote
3513 3513 while (*rd != quote) { // include everything (even spaces) up until quote
3514 3514 if (*rd == 0) { // string termination means unmatched string
3515 3515 jio_fprintf(defaultStream::error_stream(),
3516 3516 "Unmatched quote in %s\n", name);
3517 3517 return JNI_ERR;
3518 3518 }
3519 3519 *wrt++ = *rd++; // copy to option string
3520 3520 }
3521 3521 rd++; // don't copy close quote
3522 3522 } else {
3523 3523 *wrt++ = *rd++; // copy to option string
3524 3524 }
3525 3525 }
3526 3526 // Need to check if we're done before writing a NULL,
3527 3527 // because the write could be to the byte that rd is pointing to.
3528 3528 if (*rd++ == 0) {
3529 3529 *wrt = 0;
3530 3530 break;
3531 3531 }
3532 3532 *wrt = 0; // Zero terminate option
3533 3533 }
3534 3534 // Construct JavaVMInitArgs structure and parse as if it was part of the command line
3535 3535 JavaVMInitArgs vm_args;
3536 3536 vm_args.version = JNI_VERSION_1_2;
3537 3537 vm_args.options = options;
3538 3538 vm_args.nOptions = i;
3539 3539 vm_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3540 3540
3541 3541 if (PrintVMOptions) {
3542 3542 const char* tail;
3543 3543 for (int i = 0; i < vm_args.nOptions; i++) {
3544 3544 const JavaVMOption *option = vm_args.options + i;
3545 3545 if (match_option(option, "-XX:", &tail)) {
3546 3546 logOption(tail);
3547 3547 }
3548 3548 }
3549 3549 }
3550 3550
3551 3551 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, Flag::ENVIRON_VAR));
3552 3552 }
3553 3553 return JNI_OK;
3554 3554 }
3555 3555
3556 3556 void Arguments::set_shared_spaces_flags() {
3557 3557 if (DumpSharedSpaces) {
3558 3558 if (RequireSharedSpaces) {
3559 3559 warning("cannot dump shared archive while using shared archive");
3560 3560 }
3561 3561 UseSharedSpaces = false;
3562 3562 #ifdef _LP64
3563 3563 if (!UseCompressedOops || !UseCompressedClassPointers) {
3564 3564 vm_exit_during_initialization(
3565 3565 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3566 3566 }
3567 3567 } else {
3568 3568 if (!UseCompressedOops || !UseCompressedClassPointers) {
3569 3569 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3570 3570 }
3571 3571 #endif
3572 3572 }
3573 3573 }
3574 3574
3575 3575 #if !INCLUDE_ALL_GCS
3576 3576 static void force_serial_gc() {
3577 3577 FLAG_SET_DEFAULT(UseSerialGC, true);
3578 3578 FLAG_SET_DEFAULT(CMSIncrementalMode, false); // special CMS suboption
3579 3579 UNSUPPORTED_GC_OPTION(UseG1GC);
3580 3580 UNSUPPORTED_GC_OPTION(UseParallelGC);
3581 3581 UNSUPPORTED_GC_OPTION(UseParallelOldGC);
3582 3582 UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC);
3583 3583 UNSUPPORTED_GC_OPTION(UseParNewGC);
3584 3584 }
3585 3585 #endif // INCLUDE_ALL_GCS
3586 3586
3587 3587 // Sharing support
3588 3588 // Construct the path to the archive
3589 3589 static char* get_shared_archive_path() {
3590 3590 char *shared_archive_path;
3591 3591 if (SharedArchiveFile == NULL) {
3592 3592 char jvm_path[JVM_MAXPATHLEN];
3593 3593 os::jvm_path(jvm_path, sizeof(jvm_path));
3594 3594 char *end = strrchr(jvm_path, *os::file_separator());
3595 3595 if (end != NULL) *end = '\0';
3596 3596 size_t jvm_path_len = strlen(jvm_path);
3597 3597 size_t file_sep_len = strlen(os::file_separator());
3598 3598 shared_archive_path = NEW_C_HEAP_ARRAY(char, jvm_path_len +
3599 3599 file_sep_len + 20, mtInternal);
3600 3600 if (shared_archive_path != NULL) {
3601 3601 strncpy(shared_archive_path, jvm_path, jvm_path_len + 1);
3602 3602 strncat(shared_archive_path, os::file_separator(), file_sep_len);
3603 3603 strncat(shared_archive_path, "classes.jsa", 11);
3604 3604 }
3605 3605 } else {
3606 3606 shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(SharedArchiveFile) + 1, mtInternal);
3607 3607 if (shared_archive_path != NULL) {
3608 3608 strncpy(shared_archive_path, SharedArchiveFile, strlen(SharedArchiveFile) + 1);
3609 3609 }
3610 3610 }
3611 3611 return shared_archive_path;
3612 3612 }
3613 3613
3614 3614 #ifndef PRODUCT
3615 3615 // Determine whether LogVMOutput should be implicitly turned on.
3616 3616 static bool use_vm_log() {
3617 3617 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3618 3618 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3619 3619 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3620 3620 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3621 3621 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3622 3622 return true;
3623 3623 }
3624 3624
3625 3625 #ifdef COMPILER1
3626 3626 if (PrintC1Statistics) {
3627 3627 return true;
3628 3628 }
3629 3629 #endif // COMPILER1
3630 3630
3631 3631 #ifdef COMPILER2
3632 3632 if (PrintOptoAssembly || PrintOptoStatistics) {
3633 3633 return true;
3634 3634 }
3635 3635 #endif // COMPILER2
3636 3636
3637 3637 return false;
3638 3638 }
3639 3639 #endif // PRODUCT
3640 3640
3641 3641 // Parse entry point called from JNI_CreateJavaVM
3642 3642
3643 3643 jint Arguments::parse(const JavaVMInitArgs* args) {
3644 3644
3645 3645 // Remaining part of option string
3646 3646 const char* tail;
3647 3647
3648 3648 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
3649 3649 const char* hotspotrc = ".hotspotrc";
3650 3650 bool settings_file_specified = false;
3651 3651 bool needs_hotspotrc_warning = false;
3652 3652
3653 3653 ArgumentsExt::process_options(args);
3654 3654
3655 3655 const char* flags_file;
3656 3656 int index;
3657 3657 for (index = 0; index < args->nOptions; index++) {
3658 3658 const JavaVMOption *option = args->options + index;
3659 3659 if (match_option(option, "-XX:Flags=", &tail)) {
3660 3660 flags_file = tail;
3661 3661 settings_file_specified = true;
3662 3662 }
3663 3663 if (match_option(option, "-XX:+PrintVMOptions", &tail)) {
3664 3664 PrintVMOptions = true;
3665 3665 }
3666 3666 if (match_option(option, "-XX:-PrintVMOptions", &tail)) {
3667 3667 PrintVMOptions = false;
3668 3668 }
3669 3669 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions", &tail)) {
3670 3670 IgnoreUnrecognizedVMOptions = true;
3671 3671 }
3672 3672 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions", &tail)) {
3673 3673 IgnoreUnrecognizedVMOptions = false;
3674 3674 }
3675 3675 if (match_option(option, "-XX:+PrintFlagsInitial", &tail)) {
3676 3676 CommandLineFlags::printFlags(tty, false);
3677 3677 vm_exit(0);
3678 3678 }
3679 3679 #if INCLUDE_NMT
3680 3680 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3681 3681 // The launcher did not setup nmt environment variable properly.
3682 3682 if (!MemTracker::check_launcher_nmt_support(tail)) {
3683 3683 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3684 3684 }
3685 3685
3686 3686 // Verify if nmt option is valid.
3687 3687 if (MemTracker::verify_nmt_option()) {
3688 3688 // Late initialization, still in single-threaded mode.
3689 3689 if (MemTracker::tracking_level() >= NMT_summary) {
3690 3690 MemTracker::init();
3691 3691 }
3692 3692 } else {
3693 3693 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3694 3694 }
3695 3695 }
3696 3696 #endif
3697 3697
3698 3698
3699 3699 #ifndef PRODUCT
3700 3700 if (match_option(option, "-XX:+PrintFlagsWithComments", &tail)) {
3701 3701 CommandLineFlags::printFlags(tty, true);
3702 3702 vm_exit(0);
3703 3703 }
3704 3704 #endif
3705 3705 }
3706 3706
3707 3707 if (IgnoreUnrecognizedVMOptions) {
3708 3708 // uncast const to modify the flag args->ignoreUnrecognized
3709 3709 *(jboolean*)(&args->ignoreUnrecognized) = true;
3710 3710 }
3711 3711
3712 3712 // Parse specified settings file
3713 3713 if (settings_file_specified) {
3714 3714 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) {
3715 3715 return JNI_EINVAL;
3716 3716 }
3717 3717 } else {
3718 3718 #ifdef ASSERT
3719 3719 // Parse default .hotspotrc settings file
3720 3720 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) {
3721 3721 return JNI_EINVAL;
3722 3722 }
3723 3723 #else
3724 3724 struct stat buf;
3725 3725 if (os::stat(hotspotrc, &buf) == 0) {
3726 3726 needs_hotspotrc_warning = true;
3727 3727 }
3728 3728 #endif
3729 3729 }
3730 3730
3731 3731 if (PrintVMOptions) {
3732 3732 for (index = 0; index < args->nOptions; index++) {
3733 3733 const JavaVMOption *option = args->options + index;
3734 3734 if (match_option(option, "-XX:", &tail)) {
3735 3735 logOption(tail);
3736 3736 }
3737 3737 }
3738 3738 }
3739 3739
3740 3740 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
3741 3741 jint result = parse_vm_init_args(args);
3742 3742 if (result != JNI_OK) {
3743 3743 return result;
3744 3744 }
3745 3745
3746 3746 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
3747 3747 SharedArchivePath = get_shared_archive_path();
3748 3748 if (SharedArchivePath == NULL) {
3749 3749 return JNI_ENOMEM;
3750 3750 }
3751 3751
3752 3752 // Set up VerifySharedSpaces
3753 3753 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
3754 3754 VerifySharedSpaces = true;
3755 3755 }
3756 3756
3757 3757 // Delay warning until here so that we've had a chance to process
3758 3758 // the -XX:-PrintWarnings flag
3759 3759 if (needs_hotspotrc_warning) {
3760 3760 warning("%s file is present but has been ignored. "
3761 3761 "Run with -XX:Flags=%s to load the file.",
3762 3762 hotspotrc, hotspotrc);
3763 3763 }
3764 3764
3765 3765 #ifdef _ALLBSD_SOURCE // UseLargePages is not yet supported on BSD.
3766 3766 UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages");
3767 3767 #endif
3768 3768
3769 3769 #if INCLUDE_ALL_GCS
3770 3770 #if (defined JAVASE_EMBEDDED || defined ARM)
3771 3771 UNSUPPORTED_OPTION(UseG1GC, "G1 GC");
3772 3772 #endif
3773 3773 #endif
3774 3774
3775 3775 #ifndef PRODUCT
3776 3776 if (TraceBytecodesAt != 0) {
3777 3777 TraceBytecodes = true;
3778 3778 }
3779 3779 if (CountCompiledCalls) {
3780 3780 if (UseCounterDecay) {
3781 3781 warning("UseCounterDecay disabled because CountCalls is set");
3782 3782 UseCounterDecay = false;
3783 3783 }
3784 3784 }
3785 3785 #endif // PRODUCT
3786 3786
3787 3787 // JSR 292 is not supported before 1.7
3788 3788 if (!JDK_Version::is_gte_jdk17x_version()) {
3789 3789 if (EnableInvokeDynamic) {
3790 3790 if (!FLAG_IS_DEFAULT(EnableInvokeDynamic)) {
3791 3791 warning("JSR 292 is not supported before 1.7. Disabling support.");
3792 3792 }
3793 3793 EnableInvokeDynamic = false;
3794 3794 }
3795 3795 }
3796 3796
3797 3797 if (EnableInvokeDynamic && ScavengeRootsInCode == 0) {
3798 3798 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
3799 3799 warning("forcing ScavengeRootsInCode non-zero because EnableInvokeDynamic is true");
3800 3800 }
3801 3801 ScavengeRootsInCode = 1;
3802 3802 }
3803 3803
3804 3804 if (PrintGCDetails) {
3805 3805 // Turn on -verbose:gc options as well
3806 3806 PrintGC = true;
3807 3807 }
3808 3808
3809 3809 if (!JDK_Version::is_gte_jdk18x_version()) {
3810 3810 // To avoid changing the log format for 7 updates this flag is only
3811 3811 // true by default in JDK8 and above.
3812 3812 if (FLAG_IS_DEFAULT(PrintGCCause)) {
3813 3813 FLAG_SET_DEFAULT(PrintGCCause, false);
3814 3814 }
3815 3815 }
3816 3816
3817 3817 // Set object alignment values.
3818 3818 set_object_alignment();
3819 3819
3820 3820 #if !INCLUDE_ALL_GCS
3821 3821 force_serial_gc();
3822 3822 #endif // INCLUDE_ALL_GCS
3823 3823 #if !INCLUDE_CDS
3824 3824 if (DumpSharedSpaces || RequireSharedSpaces) {
3825 3825 jio_fprintf(defaultStream::error_stream(),
3826 3826 "Shared spaces are not supported in this VM\n");
3827 3827 return JNI_ERR;
3828 3828 }
3829 3829 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) {
3830 3830 warning("Shared spaces are not supported in this VM");
3831 3831 FLAG_SET_DEFAULT(UseSharedSpaces, false);
3832 3832 FLAG_SET_DEFAULT(PrintSharedSpaces, false);
3833 3833 }
3834 3834 no_shared_spaces("CDS Disabled");
3835 3835 #endif // INCLUDE_CDS
3836 3836
3837 3837 return JNI_OK;
3838 3838 }
3839 3839
3840 3840 jint Arguments::apply_ergo() {
3841 3841
3842 3842 // Set flags based on ergonomics.
3843 3843 set_ergonomics_flags();
3844 3844
3845 3845 set_shared_spaces_flags();
3846 3846
3847 3847 // Check the GC selections again.
3848 3848 if (!ArgumentsExt::check_gc_consistency_ergo()) {
3849 3849 return JNI_EINVAL;
3850 3850 }
3851 3851
3852 3852 if (TieredCompilation) {
3853 3853 set_tiered_flags();
3854 3854 } else {
3855 3855 // Check if the policy is valid. Policies 0 and 1 are valid for non-tiered setup.
3856 3856 if (CompilationPolicyChoice >= 2) {
3857 3857 vm_exit_during_initialization(
3858 3858 "Incompatible compilation policy selected", NULL);
3859 3859 }
3860 3860 }
3861 3861 // Set NmethodSweepFraction after the size of the code cache is adapted (in case of tiered)
3862 3862 if (FLAG_IS_DEFAULT(NmethodSweepFraction)) {
3863 3863 FLAG_SET_DEFAULT(NmethodSweepFraction, 1 + ReservedCodeCacheSize / (16 * M));
3864 3864 }
3865 3865
3866 3866
3867 3867 // Set heap size based on available physical memory
3868 3868 set_heap_size();
3869 3869
3870 3870 set_gc_specific_flags();
3871 3871
3872 3872 // Initialize Metaspace flags and alignments.
3873 3873 Metaspace::ergo_initialize();
3874 3874
3875 3875 // Set bytecode rewriting flags
3876 3876 set_bytecode_flags();
3877 3877
3878 3878 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled.
3879 3879 set_aggressive_opts_flags();
3880 3880
3881 3881 // Turn off biased locking for locking debug mode flags,
3882 3882 // which are subtlely different from each other but neither works with
3883 3883 // biased locking.
3884 3884 if (UseHeavyMonitors
3885 3885 #ifdef COMPILER1
3886 3886 || !UseFastLocking
3887 3887 #endif // COMPILER1
3888 3888 ) {
3889 3889 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
3890 3890 // flag set to true on command line; warn the user that they
3891 3891 // can't enable biased locking here
3892 3892 warning("Biased Locking is not supported with locking debug flags"
3893 3893 "; ignoring UseBiasedLocking flag." );
3894 3894 }
3895 3895 UseBiasedLocking = false;
3896 3896 }
3897 3897
3898 3898 #ifdef ZERO
3899 3899 // Clear flags not supported on zero.
3900 3900 FLAG_SET_DEFAULT(ProfileInterpreter, false);
3901 3901 FLAG_SET_DEFAULT(UseBiasedLocking, false);
3902 3902 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
3903 3903 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
3904 3904 #endif // CC_INTERP
3905 3905
3906 3906 #ifdef COMPILER2
3907 3907 if (!EliminateLocks) {
3908 3908 EliminateNestedLocks = false;
3909 3909 }
3910 3910 if (!Inline) {
3911 3911 IncrementalInline = false;
3912 3912 }
3913 3913 #ifndef PRODUCT
3914 3914 if (!IncrementalInline) {
3915 3915 AlwaysIncrementalInline = false;
3916 3916 }
3917 3917 #endif
3918 3918 if (IncrementalInline && FLAG_IS_DEFAULT(MaxNodeLimit)) {
3919 3919 // incremental inlining: bump MaxNodeLimit
3920 3920 FLAG_SET_DEFAULT(MaxNodeLimit, (intx)75000);
3921 3921 }
3922 3922 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
3923 3923 // nothing to use the profiling, turn if off
3924 3924 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
3925 3925 }
3926 3926 #endif
3927 3927
3928 3928 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
3929 3929 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
3930 3930 DebugNonSafepoints = true;
3931 3931 }
3932 3932
3933 3933 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
3934 3934 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
3935 3935 }
3936 3936
3937 3937 #ifndef PRODUCT
3938 3938 if (CompileTheWorld) {
3939 3939 // Force NmethodSweeper to sweep whole CodeCache each time.
3940 3940 if (FLAG_IS_DEFAULT(NmethodSweepFraction)) {
3941 3941 NmethodSweepFraction = 1;
3942 3942 }
3943 3943 }
3944 3944
3945 3945 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
3946 3946 if (use_vm_log()) {
3947 3947 LogVMOutput = true;
3948 3948 }
3949 3949 }
3950 3950 #endif // PRODUCT
3951 3951
3952 3952 if (PrintCommandLineFlags) {
3953 3953 CommandLineFlags::printSetFlags(tty);
3954 3954 }
3955 3955
3956 3956 // Apply CPU specific policy for the BiasedLocking
3957 3957 if (UseBiasedLocking) {
3958 3958 if (!VM_Version::use_biased_locking() &&
3959 3959 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
3960 3960 UseBiasedLocking = false;
3961 3961 }
3962 3962 }
3963 3963 #ifdef COMPILER2
3964 3964 if (!UseBiasedLocking || EmitSync != 0) {
3965 3965 UseOptoBiasInlining = false;
3966 3966 }
3967 3967 #endif
3968 3968
3969 3969 // set PauseAtExit if the gamma launcher was used and a debugger is attached
3970 3970 // but only if not already set on the commandline
3971 3971 if (Arguments::created_by_gamma_launcher() && os::is_debugger_attached()) {
3972 3972 bool set = false;
3973 3973 CommandLineFlags::wasSetOnCmdline("PauseAtExit", &set);
3974 3974 if (!set) {
3975 3975 FLAG_SET_DEFAULT(PauseAtExit, true);
3976 3976 }
3977 3977 }
3978 3978
3979 3979 return JNI_OK;
3980 3980 }
3981 3981
3982 3982 jint Arguments::adjust_after_os() {
3983 3983 if (UseNUMA) {
3984 3984 if (UseParallelGC || UseParallelOldGC) {
3985 3985 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
3986 3986 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
3987 3987 }
3988 3988 }
3989 3989 // UseNUMAInterleaving is set to ON for all collectors and
3990 3990 // platforms when UseNUMA is set to ON. NUMA-aware collectors
3991 3991 // such as the parallel collector for Linux and Solaris will
3992 3992 // interleave old gen and survivor spaces on top of NUMA
3993 3993 // allocation policy for the eden space.
3994 3994 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
3995 3995 // all platforms and ParallelGC on Windows will interleave all
3996 3996 // of the heap spaces across NUMA nodes.
3997 3997 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
3998 3998 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
3999 3999 }
4000 4000 }
4001 4001 return JNI_OK;
4002 4002 }
4003 4003
4004 4004 int Arguments::PropertyList_count(SystemProperty* pl) {
4005 4005 int count = 0;
4006 4006 while(pl != NULL) {
4007 4007 count++;
4008 4008 pl = pl->next();
4009 4009 }
4010 4010 return count;
4011 4011 }
4012 4012
4013 4013 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4014 4014 assert(key != NULL, "just checking");
4015 4015 SystemProperty* prop;
4016 4016 for (prop = pl; prop != NULL; prop = prop->next()) {
4017 4017 if (strcmp(key, prop->key()) == 0) return prop->value();
4018 4018 }
4019 4019 return NULL;
4020 4020 }
4021 4021
4022 4022 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4023 4023 int count = 0;
4024 4024 const char* ret_val = NULL;
4025 4025
4026 4026 while(pl != NULL) {
4027 4027 if(count >= index) {
4028 4028 ret_val = pl->key();
4029 4029 break;
4030 4030 }
4031 4031 count++;
4032 4032 pl = pl->next();
4033 4033 }
4034 4034
4035 4035 return ret_val;
4036 4036 }
4037 4037
4038 4038 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4039 4039 int count = 0;
4040 4040 char* ret_val = NULL;
4041 4041
4042 4042 while(pl != NULL) {
4043 4043 if(count >= index) {
4044 4044 ret_val = pl->value();
4045 4045 break;
4046 4046 }
4047 4047 count++;
4048 4048 pl = pl->next();
4049 4049 }
4050 4050
4051 4051 return ret_val;
4052 4052 }
4053 4053
4054 4054 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4055 4055 SystemProperty* p = *plist;
4056 4056 if (p == NULL) {
4057 4057 *plist = new_p;
4058 4058 } else {
4059 4059 while (p->next() != NULL) {
4060 4060 p = p->next();
4061 4061 }
4062 4062 p->set_next(new_p);
4063 4063 }
4064 4064 }
4065 4065
4066 4066 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) {
4067 4067 if (plist == NULL)
4068 4068 return;
4069 4069
4070 4070 SystemProperty* new_p = new SystemProperty(k, v, true);
4071 4071 PropertyList_add(plist, new_p);
4072 4072 }
4073 4073
4074 4074 // This add maintains unique property key in the list.
4075 4075 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append) {
4076 4076 if (plist == NULL)
4077 4077 return;
4078 4078
4079 4079 // If property key exist then update with new value.
4080 4080 SystemProperty* prop;
4081 4081 for (prop = *plist; prop != NULL; prop = prop->next()) {
4082 4082 if (strcmp(k, prop->key()) == 0) {
4083 4083 if (append) {
4084 4084 prop->append_value(v);
4085 4085 } else {
4086 4086 prop->set_value(v);
4087 4087 }
4088 4088 return;
4089 4089 }
4090 4090 }
4091 4091
4092 4092 PropertyList_add(plist, k, v);
4093 4093 }
4094 4094
4095 4095 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4096 4096 // Returns true if all of the source pointed by src has been copied over to
4097 4097 // the destination buffer pointed by buf. Otherwise, returns false.
4098 4098 // Notes:
4099 4099 // 1. If the length (buflen) of the destination buffer excluding the
4100 4100 // NULL terminator character is not long enough for holding the expanded
4101 4101 // pid characters, it also returns false instead of returning the partially
4102 4102 // expanded one.
4103 4103 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4104 4104 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4105 4105 char* buf, size_t buflen) {
4106 4106 const char* p = src;
4107 4107 char* b = buf;
4108 4108 const char* src_end = &src[srclen];
4109 4109 char* buf_end = &buf[buflen - 1];
4110 4110
4111 4111 while (p < src_end && b < buf_end) {
4112 4112 if (*p == '%') {
4113 4113 switch (*(++p)) {
4114 4114 case '%': // "%%" ==> "%"
4115 4115 *b++ = *p++;
4116 4116 break;
4117 4117 case 'p': { // "%p" ==> current process id
4118 4118 // buf_end points to the character before the last character so
4119 4119 // that we could write '\0' to the end of the buffer.
4120 4120 size_t buf_sz = buf_end - b + 1;
4121 4121 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4122 4122
4123 4123 // if jio_snprintf fails or the buffer is not long enough to hold
4124 4124 // the expanded pid, returns false.
4125 4125 if (ret < 0 || ret >= (int)buf_sz) {
4126 4126 return false;
4127 4127 } else {
4128 4128 b += ret;
4129 4129 assert(*b == '\0', "fail in copy_expand_pid");
4130 4130 if (p == src_end && b == buf_end + 1) {
4131 4131 // reach the end of the buffer.
4132 4132 return true;
4133 4133 }
4134 4134 }
4135 4135 p++;
4136 4136 break;
4137 4137 }
4138 4138 default :
4139 4139 *b++ = '%';
4140 4140 }
4141 4141 } else {
4142 4142 *b++ = *p++;
4143 4143 }
4144 4144 }
4145 4145 *b = '\0';
4146 4146 return (p == src_end); // return false if not all of the source was copied
4147 4147 }
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