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--- old/src/share/vm/runtime/globals.hpp
+++ new/src/share/vm/runtime/globals.hpp
1 1 /*
2 2 * Copyright (c) 1997, 2015, 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 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
26 26 #define SHARE_VM_RUNTIME_GLOBALS_HPP
27 27
28 28 #include "utilities/debug.hpp"
29 29 #include <float.h> // for DBL_MAX
30 30
31 31 // use this for flags that are true per default in the tiered build
32 32 // but false in non-tiered builds, and vice versa
33 33 #ifdef TIERED
34 34 #define trueInTiered true
35 35 #define falseInTiered false
36 36 #else
37 37 #define trueInTiered false
38 38 #define falseInTiered true
39 39 #endif
40 40
41 41 #ifdef TARGET_ARCH_x86
42 42 # include "globals_x86.hpp"
43 43 #endif
44 44 #ifdef TARGET_ARCH_sparc
45 45 # include "globals_sparc.hpp"
46 46 #endif
47 47 #ifdef TARGET_ARCH_zero
48 48 # include "globals_zero.hpp"
49 49 #endif
50 50 #ifdef TARGET_ARCH_arm
51 51 # include "globals_arm.hpp"
52 52 #endif
53 53 #ifdef TARGET_ARCH_ppc
54 54 # include "globals_ppc.hpp"
55 55 #endif
56 56 #ifdef TARGET_ARCH_aarch64
57 57 # include "globals_aarch64.hpp"
58 58 #endif
59 59 #ifdef TARGET_OS_FAMILY_linux
60 60 # include "globals_linux.hpp"
61 61 #endif
62 62 #ifdef TARGET_OS_FAMILY_solaris
63 63 # include "globals_solaris.hpp"
64 64 #endif
65 65 #ifdef TARGET_OS_FAMILY_windows
66 66 # include "globals_windows.hpp"
67 67 #endif
68 68 #ifdef TARGET_OS_FAMILY_aix
69 69 # include "globals_aix.hpp"
70 70 #endif
71 71 #ifdef TARGET_OS_FAMILY_bsd
72 72 # include "globals_bsd.hpp"
73 73 #endif
74 74 #ifdef TARGET_OS_ARCH_linux_x86
75 75 # include "globals_linux_x86.hpp"
76 76 #endif
77 77 #ifdef TARGET_OS_ARCH_linux_sparc
78 78 # include "globals_linux_sparc.hpp"
79 79 #endif
80 80 #ifdef TARGET_OS_ARCH_linux_zero
81 81 # include "globals_linux_zero.hpp"
82 82 #endif
83 83 #ifdef TARGET_OS_ARCH_solaris_x86
84 84 # include "globals_solaris_x86.hpp"
85 85 #endif
86 86 #ifdef TARGET_OS_ARCH_solaris_sparc
87 87 # include "globals_solaris_sparc.hpp"
88 88 #endif
89 89 #ifdef TARGET_OS_ARCH_windows_x86
90 90 # include "globals_windows_x86.hpp"
91 91 #endif
92 92 #ifdef TARGET_OS_ARCH_linux_arm
93 93 # include "globals_linux_arm.hpp"
94 94 #endif
95 95 #ifdef TARGET_OS_ARCH_linux_ppc
96 96 # include "globals_linux_ppc.hpp"
97 97 #endif
98 98 #ifdef TARGET_OS_ARCH_linux_aarch64
99 99 # include "globals_linux_aarch64.hpp"
100 100 #endif
101 101 #ifdef TARGET_OS_ARCH_aix_ppc
102 102 # include "globals_aix_ppc.hpp"
103 103 #endif
104 104 #ifdef TARGET_OS_ARCH_bsd_x86
105 105 # include "globals_bsd_x86.hpp"
106 106 #endif
107 107 #ifdef TARGET_OS_ARCH_bsd_zero
108 108 # include "globals_bsd_zero.hpp"
109 109 #endif
110 110 #ifdef COMPILER1
111 111 #ifdef TARGET_ARCH_x86
112 112 # include "c1_globals_x86.hpp"
113 113 #endif
114 114 #ifdef TARGET_ARCH_sparc
115 115 # include "c1_globals_sparc.hpp"
116 116 #endif
117 117 #ifdef TARGET_ARCH_arm
118 118 # include "c1_globals_arm.hpp"
119 119 #endif
120 120 #ifdef TARGET_ARCH_aarch64
121 121 # include "c1_globals_aarch64.hpp"
122 122 #endif
123 123 #ifdef TARGET_OS_FAMILY_linux
124 124 # include "c1_globals_linux.hpp"
125 125 #endif
126 126 #ifdef TARGET_OS_FAMILY_solaris
127 127 # include "c1_globals_solaris.hpp"
128 128 #endif
129 129 #ifdef TARGET_OS_FAMILY_windows
130 130 # include "c1_globals_windows.hpp"
131 131 #endif
132 132 #ifdef TARGET_OS_FAMILY_aix
133 133 # include "c1_globals_aix.hpp"
134 134 #endif
135 135 #ifdef TARGET_OS_FAMILY_bsd
136 136 # include "c1_globals_bsd.hpp"
137 137 #endif
138 138 #ifdef TARGET_ARCH_ppc
139 139 # include "c1_globals_ppc.hpp"
140 140 #endif
141 141 #endif
142 142 #ifdef COMPILER2
143 143 #ifdef TARGET_ARCH_x86
144 144 # include "c2_globals_x86.hpp"
145 145 #endif
146 146 #ifdef TARGET_ARCH_sparc
147 147 # include "c2_globals_sparc.hpp"
148 148 #endif
149 149 #ifdef TARGET_ARCH_arm
150 150 # include "c2_globals_arm.hpp"
151 151 #endif
152 152 #ifdef TARGET_ARCH_ppc
153 153 # include "c2_globals_ppc.hpp"
154 154 #endif
155 155 #ifdef TARGET_ARCH_aarch64
156 156 # include "c2_globals_aarch64.hpp"
157 157 #endif
158 158 #ifdef TARGET_OS_FAMILY_linux
159 159 # include "c2_globals_linux.hpp"
160 160 #endif
161 161 #ifdef TARGET_OS_FAMILY_solaris
162 162 # include "c2_globals_solaris.hpp"
163 163 #endif
164 164 #ifdef TARGET_OS_FAMILY_windows
165 165 # include "c2_globals_windows.hpp"
166 166 #endif
167 167 #ifdef TARGET_OS_FAMILY_aix
168 168 # include "c2_globals_aix.hpp"
169 169 #endif
170 170 #ifdef TARGET_OS_FAMILY_bsd
171 171 # include "c2_globals_bsd.hpp"
172 172 #endif
173 173 #endif
174 174 #ifdef SHARK
175 175 #ifdef TARGET_ARCH_zero
176 176 # include "shark_globals_zero.hpp"
177 177 #endif
178 178 #endif
179 179
180 180 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) && !INCLUDE_JVMCI
181 181 define_pd_global(bool, BackgroundCompilation, false);
182 182 define_pd_global(bool, UseTLAB, false);
183 183 define_pd_global(bool, CICompileOSR, false);
184 184 define_pd_global(bool, UseTypeProfile, false);
185 185 define_pd_global(bool, UseOnStackReplacement, false);
186 186 define_pd_global(bool, InlineIntrinsics, false);
187 187 define_pd_global(bool, PreferInterpreterNativeStubs, true);
188 188 define_pd_global(bool, ProfileInterpreter, false);
189 189 define_pd_global(bool, ProfileTraps, false);
190 190 define_pd_global(bool, TieredCompilation, false);
191 191
192 192 define_pd_global(intx, CompileThreshold, 0);
193 193
194 194 define_pd_global(intx, OnStackReplacePercentage, 0);
195 195 define_pd_global(bool, ResizeTLAB, false);
196 196 define_pd_global(intx, FreqInlineSize, 0);
197 197 define_pd_global(size_t, NewSizeThreadIncrease, 4*K);
198 198 define_pd_global(intx, InlineClassNatives, true);
199 199 define_pd_global(intx, InlineUnsafeOps, true);
200 200 define_pd_global(intx, InitialCodeCacheSize, 160*K);
201 201 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
202 202 define_pd_global(intx, NonProfiledCodeHeapSize, 0);
203 203 define_pd_global(intx, ProfiledCodeHeapSize, 0);
204 204 define_pd_global(intx, NonNMethodCodeHeapSize, 32*M);
205 205
206 206 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
207 207 define_pd_global(intx, CodeCacheMinBlockLength, 1);
208 208 define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K);
209 209 define_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M));
210 210 define_pd_global(bool, NeverActAsServerClassMachine, true);
211 211 define_pd_global(uint64_t,MaxRAM, 1ULL*G);
212 212 #define CI_COMPILER_COUNT 0
213 213 #else
214 214
215 215 #if defined(COMPILER2) || INCLUDE_JVMCI
216 216 #define CI_COMPILER_COUNT 2
217 217 #else
218 218 #define CI_COMPILER_COUNT 1
219 219 #endif // COMPILER2 || INCLUDE_JVMCI
220 220
221 221 #endif // no compilers
222 222
223 223 // string type aliases used only in this file
224 224 typedef const char* ccstr;
225 225 typedef const char* ccstrlist; // represents string arguments which accumulate
226 226
227 227 struct Flag {
228 228 enum Flags {
229 229 // value origin
230 230 DEFAULT = 0,
231 231 COMMAND_LINE = 1,
232 232 ENVIRON_VAR = 2,
233 233 CONFIG_FILE = 3,
234 234 MANAGEMENT = 4,
235 235 ERGONOMIC = 5,
236 236 ATTACH_ON_DEMAND = 6,
237 237 INTERNAL = 7,
238 238
239 239 LAST_VALUE_ORIGIN = INTERNAL,
240 240 VALUE_ORIGIN_BITS = 4,
241 241 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
242 242
243 243 // flag kind
244 244 KIND_PRODUCT = 1 << 4,
245 245 KIND_MANAGEABLE = 1 << 5,
246 246 KIND_DIAGNOSTIC = 1 << 6,
247 247 KIND_EXPERIMENTAL = 1 << 7,
248 248 KIND_NOT_PRODUCT = 1 << 8,
249 249 KIND_DEVELOP = 1 << 9,
250 250 KIND_PLATFORM_DEPENDENT = 1 << 10,
251 251 KIND_READ_WRITE = 1 << 11,
252 252 KIND_C1 = 1 << 12,
253 253 KIND_C2 = 1 << 13,
254 254 KIND_ARCH = 1 << 14,
255 255 KIND_SHARK = 1 << 15,
256 256 KIND_LP64_PRODUCT = 1 << 16,
257 257 KIND_COMMERCIAL = 1 << 17,
258 258 KIND_JVMCI = 1 << 18,
259 259
260 260 KIND_MASK = ~VALUE_ORIGIN_MASK
261 261 };
262 262
263 263 enum Error {
264 264 // no error
265 265 SUCCESS = 0,
266 266 // flag name is missing
267 267 MISSING_NAME,
268 268 // flag value is missing
269 269 MISSING_VALUE,
270 270 // error parsing the textual form of the value
271 271 WRONG_FORMAT,
272 272 // flag is not writeable
273 273 NON_WRITABLE,
274 274 // flag value is outside of its bounds
275 275 OUT_OF_BOUNDS,
276 276 // flag value violates its constraint
277 277 VIOLATES_CONSTRAINT,
278 278 // there is no flag with the given name
279 279 INVALID_FLAG,
280 280 // other, unspecified error related to setting the flag
281 281 ERR_OTHER
282 282 };
283 283
284 284 enum MsgType {
285 285 NONE = 0,
286 286 DIAGNOSTIC_FLAG_BUT_LOCKED,
287 287 EXPERIMENTAL_FLAG_BUT_LOCKED,
288 288 DEVELOPER_FLAG_BUT_PRODUCT_BUILD,
289 289 NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD
290 290 };
291 291
292 292 const char* _type;
293 293 const char* _name;
294 294 void* _addr;
295 295 NOT_PRODUCT(const char* _doc;)
296 296 Flags _flags;
297 297
298 298 // points to all Flags static array
299 299 static Flag* flags;
300 300
301 301 // number of flags
302 302 static size_t numFlags;
303 303
304 304 static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); };
305 305 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false);
306 306 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
307 307
308 308 void check_writable();
309 309
310 310 bool is_bool() const;
311 311 bool get_bool() const;
312 312 void set_bool(bool value);
313 313
314 314 bool is_int() const;
315 315 int get_int() const;
316 316 void set_int(int value);
317 317
318 318 bool is_uint() const;
319 319 uint get_uint() const;
320 320 void set_uint(uint value);
321 321
322 322 bool is_intx() const;
323 323 intx get_intx() const;
324 324 void set_intx(intx value);
325 325
326 326 bool is_uintx() const;
327 327 uintx get_uintx() const;
328 328 void set_uintx(uintx value);
329 329
330 330 bool is_uint64_t() const;
331 331 uint64_t get_uint64_t() const;
332 332 void set_uint64_t(uint64_t value);
333 333
334 334 bool is_size_t() const;
335 335 size_t get_size_t() const;
336 336 void set_size_t(size_t value);
337 337
338 338 bool is_double() const;
339 339 double get_double() const;
340 340 void set_double(double value);
341 341
342 342 bool is_ccstr() const;
343 343 bool ccstr_accumulates() const;
344 344 ccstr get_ccstr() const;
345 345 void set_ccstr(ccstr value);
346 346
347 347 Flags get_origin();
348 348 void set_origin(Flags origin);
349 349
350 350 bool is_default();
351 351 bool is_ergonomic();
352 352 bool is_command_line();
353 353
354 354 bool is_product() const;
355 355 bool is_manageable() const;
356 356 bool is_diagnostic() const;
357 357 bool is_experimental() const;
358 358 bool is_notproduct() const;
359 359 bool is_develop() const;
360 360 bool is_read_write() const;
361 361 bool is_commercial() const;
362 362
363 363 bool is_constant_in_binary() const;
364 364
365 365 bool is_unlocker() const;
366 366 bool is_unlocked() const;
367 367 bool is_writeable() const;
368 368 bool is_external() const;
369 369
370 370 bool is_unlocker_ext() const;
371 371 bool is_unlocked_ext() const;
372 372 bool is_writeable_ext() const;
373 373 bool is_external_ext() const;
374 374
375 375 void unlock_diagnostic();
376 376
377 377 Flag::MsgType get_locked_message(char*, int) const;
378 378 void get_locked_message_ext(char*, int) const;
379 379
380 380 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges
381 381 void print_on(outputStream* st, bool withComments = false, bool printRanges = false);
382 382 void print_kind(outputStream* st);
383 383 void print_as_flag(outputStream* st);
384 384
385 385 static const char* flag_error_str(Flag::Error error);
386 386 };
387 387
388 388 // debug flags control various aspects of the VM and are global accessible
389 389
390 390 // use FlagSetting to temporarily change some debug flag
391 391 // e.g. FlagSetting fs(DebugThisAndThat, true);
392 392 // restored to previous value upon leaving scope
393 393 class FlagSetting {
394 394 bool val;
395 395 bool* flag;
396 396 public:
397 397 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
398 398 ~FlagSetting() { *flag = val; }
399 399 };
400 400
401 401
402 402 class CounterSetting {
403 403 intx* counter;
404 404 public:
405 405 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
406 406 ~CounterSetting() { (*counter)--; }
407 407 };
408 408
409 409 class IntFlagSetting {
410 410 int val;
411 411 int* flag;
412 412 public:
413 413 IntFlagSetting(int& fl, int newValue) { flag = &fl; val = fl; fl = newValue; }
414 414 ~IntFlagSetting() { *flag = val; }
415 415 };
416 416
417 417 class UIntFlagSetting {
418 418 uint val;
419 419 uint* flag;
420 420 public:
421 421 UIntFlagSetting(uint& fl, uint newValue) { flag = &fl; val = fl; fl = newValue; }
422 422 ~UIntFlagSetting() { *flag = val; }
423 423 };
424 424
425 425 class UIntXFlagSetting {
426 426 uintx val;
427 427 uintx* flag;
428 428 public:
429 429 UIntXFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
430 430 ~UIntXFlagSetting() { *flag = val; }
431 431 };
432 432
433 433 class DoubleFlagSetting {
434 434 double val;
435 435 double* flag;
436 436 public:
437 437 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
438 438 ~DoubleFlagSetting() { *flag = val; }
439 439 };
440 440
441 441 class SizeTFlagSetting {
442 442 size_t val;
443 443 size_t* flag;
444 444 public:
445 445 SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; }
446 446 ~SizeTFlagSetting() { *flag = val; }
447 447 };
448 448
449 449
450 450 class CommandLineFlags {
451 451 public:
452 452 static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false);
453 453 static Flag::Error boolAt(const char* name, bool* value, bool allow_locked = false, bool return_flag = false) { return boolAt(name, strlen(name), value, allow_locked, return_flag); }
454 454 static Flag::Error boolAtPut(Flag* flag, bool* value, Flag::Flags origin);
455 455 static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin);
456 456 static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); }
457 457
458 458 static Flag::Error intAt(const char* name, size_t len, int* value, bool allow_locked = false, bool return_flag = false);
459 459 static Flag::Error intAt(const char* name, int* value, bool allow_locked = false, bool return_flag = false) { return intAt(name, strlen(name), value, allow_locked, return_flag); }
460 460 static Flag::Error intAtPut(Flag* flag, int* value, Flag::Flags origin);
461 461 static Flag::Error intAtPut(const char* name, size_t len, int* value, Flag::Flags origin);
462 462 static Flag::Error intAtPut(const char* name, int* value, Flag::Flags origin) { return intAtPut(name, strlen(name), value, origin); }
463 463
464 464 static Flag::Error uintAt(const char* name, size_t len, uint* value, bool allow_locked = false, bool return_flag = false);
465 465 static Flag::Error uintAt(const char* name, uint* value, bool allow_locked = false, bool return_flag = false) { return uintAt(name, strlen(name), value, allow_locked, return_flag); }
466 466 static Flag::Error uintAtPut(Flag* flag, uint* value, Flag::Flags origin);
467 467 static Flag::Error uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin);
468 468 static Flag::Error uintAtPut(const char* name, uint* value, Flag::Flags origin) { return uintAtPut(name, strlen(name), value, origin); }
469 469
470 470 static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false);
471 471 static Flag::Error intxAt(const char* name, intx* value, bool allow_locked = false, bool return_flag = false) { return intxAt(name, strlen(name), value, allow_locked, return_flag); }
472 472 static Flag::Error intxAtPut(Flag* flag, intx* value, Flag::Flags origin);
473 473 static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin);
474 474 static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); }
475 475
476 476 static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false);
477 477 static Flag::Error uintxAt(const char* name, uintx* value, bool allow_locked = false, bool return_flag = false) { return uintxAt(name, strlen(name), value, allow_locked, return_flag); }
478 478 static Flag::Error uintxAtPut(Flag* flag, uintx* value, Flag::Flags origin);
479 479 static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin);
480 480 static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
481 481
482 482 static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false);
483 483 static Flag::Error size_tAt(const char* name, size_t* value, bool allow_locked = false, bool return_flag = false) { return size_tAt(name, strlen(name), value, allow_locked, return_flag); }
484 484 static Flag::Error size_tAtPut(Flag* flag, size_t* value, Flag::Flags origin);
485 485 static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin);
486 486 static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); }
487 487
488 488 static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false);
489 489 static Flag::Error uint64_tAt(const char* name, uint64_t* value, bool allow_locked = false, bool return_flag = false) { return uint64_tAt(name, strlen(name), value, allow_locked, return_flag); }
490 490 static Flag::Error uint64_tAtPut(Flag* flag, uint64_t* value, Flag::Flags origin);
491 491 static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin);
492 492 static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
493 493
494 494 static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false);
495 495 static Flag::Error doubleAt(const char* name, double* value, bool allow_locked = false, bool return_flag = false) { return doubleAt(name, strlen(name), value, allow_locked, return_flag); }
496 496 static Flag::Error doubleAtPut(Flag* flag, double* value, Flag::Flags origin);
497 497 static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin);
498 498 static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
499 499
500 500 static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false);
501 501 static Flag::Error ccstrAt(const char* name, ccstr* value, bool allow_locked = false, bool return_flag = false) { return ccstrAt(name, strlen(name), value, allow_locked, return_flag); }
502 502 // Contract: Flag will make private copy of the incoming value.
503 503 // Outgoing value is always malloc-ed, and caller MUST call free.
504 504 static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin);
505 505 static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
506 506
507 507 // Returns false if name is not a command line flag.
508 508 static bool wasSetOnCmdline(const char* name, bool* value);
509 509 static void printSetFlags(outputStream* out);
510 510
511 511 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges
512 512 static void printFlags(outputStream* out, bool withComments, bool printRanges = false);
513 513
514 514 static void verify() PRODUCT_RETURN;
515 515 };
516 516
517 517 // use this for flags that are true by default in the debug version but
518 518 // false in the optimized version, and vice versa
519 519 #ifdef ASSERT
520 520 #define trueInDebug true
521 521 #define falseInDebug false
522 522 #else
523 523 #define trueInDebug false
524 524 #define falseInDebug true
525 525 #endif
526 526
527 527 // use this for flags that are true per default in the product build
528 528 // but false in development builds, and vice versa
529 529 #ifdef PRODUCT
530 530 #define trueInProduct true
531 531 #define falseInProduct false
532 532 #else
533 533 #define trueInProduct false
534 534 #define falseInProduct true
535 535 #endif
536 536
537 537 #ifdef JAVASE_EMBEDDED
538 538 #define falseInEmbedded false
539 539 #else
540 540 #define falseInEmbedded true
541 541 #endif
542 542
543 543 // develop flags are settable / visible only during development and are constant in the PRODUCT version
544 544 // product flags are always settable / visible
545 545 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
546 546
547 547 // A flag must be declared with one of the following types:
548 548 // bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t.
549 549 // The type "ccstr" is an alias for "const char*" and is used
550 550 // only in this file, because the macrology requires single-token type names.
551 551
552 552 // Note: Diagnostic options not meant for VM tuning or for product modes.
553 553 // They are to be used for VM quality assurance or field diagnosis
554 554 // of VM bugs. They are hidden so that users will not be encouraged to
555 555 // try them as if they were VM ordinary execution options. However, they
556 556 // are available in the product version of the VM. Under instruction
557 557 // from support engineers, VM customers can turn them on to collect
558 558 // diagnostic information about VM problems. To use a VM diagnostic
559 559 // option, you must first specify +UnlockDiagnosticVMOptions.
560 560 // (This master switch also affects the behavior of -Xprintflags.)
561 561 //
562 562 // experimental flags are in support of features that are not
563 563 // part of the officially supported product, but are available
564 564 // for experimenting with. They could, for example, be performance
565 565 // features that may not have undergone full or rigorous QA, but which may
566 566 // help performance in some cases and released for experimentation
567 567 // by the community of users and developers. This flag also allows one to
568 568 // be able to build a fully supported product that nonetheless also
569 569 // ships with some unsupported, lightly tested, experimental features.
570 570 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
571 571 // UnlockExperimentalVMOptions flag, which allows the control and
572 572 // modification of the experimental flags.
573 573 //
574 574 // Nota bene: neither diagnostic nor experimental options should be used casually,
575 575 // and they are not supported on production loads, except under explicit
576 576 // direction from support engineers.
577 577 //
578 578 // manageable flags are writeable external product flags.
579 579 // They are dynamically writeable through the JDK management interface
580 580 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
581 581 // These flags are external exported interface (see CCC). The list of
582 582 // manageable flags can be queried programmatically through the management
583 583 // interface.
584 584 //
585 585 // A flag can be made as "manageable" only if
586 586 // - the flag is defined in a CCC as an external exported interface.
587 587 // - the VM implementation supports dynamic setting of the flag.
588 588 // This implies that the VM must *always* query the flag variable
589 589 // and not reuse state related to the flag state at any given time.
590 590 // - you want the flag to be queried programmatically by the customers.
591 591 //
592 592 // product_rw flags are writeable internal product flags.
593 593 // They are like "manageable" flags but for internal/private use.
594 594 // The list of product_rw flags are internal/private flags which
595 595 // may be changed/removed in a future release. It can be set
596 596 // through the management interface to get/set value
597 597 // when the name of flag is supplied.
598 598 //
599 599 // A flag can be made as "product_rw" only if
600 600 // - the VM implementation supports dynamic setting of the flag.
601 601 // This implies that the VM must *always* query the flag variable
602 602 // and not reuse state related to the flag state at any given time.
603 603 //
604 604 // Note that when there is a need to support develop flags to be writeable,
605 605 // it can be done in the same way as product_rw.
606 606 //
607 607 // range is a macro that will expand to min and max arguments for range
608 608 // checking code if provided - see commandLineFlagRangeList.hpp
609 609 //
610 610 // constraint is a macro that will expand to custom function call
611 611 // for constraint checking if provided - see commandLineFlagConstraintList.hpp
612 612 //
613 613
614 614 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product, range, constraint) \
615 615 \
616 616 lp64_product(bool, UseCompressedOops, false, \
617 617 "Use 32-bit object references in 64-bit VM. " \
618 618 "lp64_product means flag is always constant in 32 bit VM") \
619 619 \
620 620 lp64_product(bool, UseCompressedClassPointers, false, \
621 621 "Use 32-bit class pointers in 64-bit VM. " \
622 622 "lp64_product means flag is always constant in 32 bit VM") \
623 623 \
624 624 notproduct(bool, CheckCompressedOops, true, \
625 625 "Generate checks in encoding/decoding code in debug VM") \
626 626 \
627 627 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \
628 628 "Heap allocation steps through preferred address regions to find" \
629 629 " where it can allocate the heap. Number of steps to take per " \
630 630 "region.") \
631 631 range(1, max_uintx) \
632 632 \
633 633 diagnostic(bool, PrintCompressedOopsMode, false, \
634 634 "Print compressed oops base address and encoding mode") \
635 635 \
636 636 lp64_product(intx, ObjectAlignmentInBytes, 8, \
637 637 "Default object alignment in bytes, 8 is minimum") \
638 638 range(8, 256) \
639 639 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \
640 640 \
641 641 product(bool, AssumeMP, false, \
642 642 "Instruct the VM to assume multiple processors are available") \
643 643 \
644 644 /* UseMembar is theoretically a temp flag used for memory barrier */ \
645 645 /* removal testing. It was supposed to be removed before FCS but has */ \
646 646 /* been re-added (see 6401008) */ \
647 647 product_pd(bool, UseMembar, \
648 648 "(Unstable) Issues membars on thread state transitions") \
649 649 \
650 650 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
651 651 "Clean the chunk pool asynchronously") \
652 652 \
653 653 experimental(bool, AlwaysSafeConstructors, false, \
654 654 "Force safe construction, as if all fields are final.") \
655 655 \
656 656 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
657 657 "Enable normal processing of flags relating to field diagnostics")\
658 658 \
659 659 experimental(bool, UnlockExperimentalVMOptions, false, \
660 660 "Enable normal processing of flags relating to experimental " \
661 661 "features") \
662 662 \
663 663 product(bool, JavaMonitorsInStackTrace, true, \
664 664 "Print information about Java monitor locks when the stacks are" \
665 665 "dumped") \
666 666 \
667 667 product_pd(bool, UseLargePages, \
668 668 "Use large page memory") \
669 669 \
670 670 product_pd(bool, UseLargePagesIndividualAllocation, \
671 671 "Allocate large pages individually for better affinity") \
672 672 \
673 673 develop(bool, LargePagesIndividualAllocationInjectError, false, \
674 674 "Fail large pages individual allocation") \
675 675 \
676 676 product(bool, UseLargePagesInMetaspace, false, \
677 677 "Use large page memory in metaspace. " \
678 678 "Only used if UseLargePages is enabled.") \
679 679 \
680 680 develop(bool, TracePageSizes, false, \
681 681 "Trace page size selection and usage") \
682 682 \
683 683 product(bool, UseNUMA, false, \
684 684 "Use NUMA if available") \
685 685 \
686 686 product(bool, UseNUMAInterleaving, false, \
687 687 "Interleave memory across NUMA nodes if available") \
688 688 \
689 689 product(size_t, NUMAInterleaveGranularity, 2*M, \
690 690 "Granularity to use for NUMA interleaving on Windows OS") \
691 691 range(os::vm_allocation_granularity(), max_uintx) \
692 692 constraint(NUMAInterleaveGranularityConstraintFunc,AfterErgo) \
693 693 \
694 694 product(bool, ForceNUMA, false, \
695 695 "Force NUMA optimizations on single-node/UMA systems") \
696 696 \
697 697 product(uintx, NUMAChunkResizeWeight, 20, \
698 698 "Percentage (0-100) used to weight the current sample when " \
699 699 "computing exponentially decaying average for " \
700 700 "AdaptiveNUMAChunkSizing") \
701 701 range(0, 100) \
702 702 \
703 703 product(size_t, NUMASpaceResizeRate, 1*G, \
704 704 "Do not reallocate more than this amount per collection") \
705 705 range(0, max_uintx) \
706 706 \
707 707 product(bool, UseAdaptiveNUMAChunkSizing, true, \
708 708 "Enable adaptive chunk sizing for NUMA") \
709 709 \
710 710 product(bool, NUMAStats, false, \
711 711 "Print NUMA stats in detailed heap information") \
712 712 \
713 713 product(uintx, NUMAPageScanRate, 256, \
714 714 "Maximum number of pages to include in the page scan procedure") \
715 715 range(0, max_uintx) \
716 716 \
717 717 product_pd(bool, NeedsDeoptSuspend, \
718 718 "True for register window machines (sparc/ia64)") \
719 719 \
720 720 product(intx, UseSSE, 99, \
721 721 "Highest supported SSE instructions set on x86/x64") \
722 722 range(0, 99) \
723 723 \
724 724 product(bool, UseAES, false, \
725 725 "Control whether AES instructions can be used on x86/x64") \
726 726 \
727 727 product(bool, UseSHA, false, \
728 728 "Control whether SHA instructions can be used " \
729 729 "on SPARC and on ARM") \
730 730 \
731 731 product(bool, UseGHASHIntrinsics, false, \
732 732 "Use intrinsics for GHASH versions of crypto") \
733 733 \
734 734 product(size_t, LargePageSizeInBytes, 0, \
735 735 "Large page size (0 to let VM choose the page size)") \
736 736 range(0, max_uintx) \
737 737 \
738 738 product(size_t, LargePageHeapSizeThreshold, 128*M, \
739 739 "Use large pages if maximum heap is at least this big") \
740 740 range(0, max_uintx) \
741 741 \
742 742 product(bool, ForceTimeHighResolution, false, \
743 743 "Using high time resolution (for Win32 only)") \
744 744 \
745 745 develop(bool, TraceItables, false, \
746 746 "Trace initialization and use of itables") \
747 747 \
748 748 develop(bool, TracePcPatching, false, \
749 749 "Trace usage of frame::patch_pc") \
750 750 \
751 751 develop(bool, TraceJumps, false, \
752 752 "Trace assembly jumps in thread ring buffer") \
753 753 \
754 754 develop(bool, TraceRelocator, false, \
755 755 "Trace the bytecode relocator") \
756 756 \
757 757 develop(bool, TraceLongCompiles, false, \
758 758 "Print out every time compilation is longer than " \
759 759 "a given threshold") \
760 760 \
761 761 develop(bool, SafepointALot, false, \
762 762 "Generate a lot of safepoints. This works with " \
763 763 "GuaranteedSafepointInterval") \
764 764 \
765 765 product_pd(bool, BackgroundCompilation, \
766 766 "A thread requesting compilation is not blocked during " \
767 767 "compilation") \
768 768 \
769 769 product(bool, PrintVMQWaitTime, false, \
770 770 "Print out the waiting time in VM operation queue") \
771 771 \
772 772 develop(bool, TraceOopMapGeneration, false, \
773 773 "Show OopMapGeneration") \
774 774 \
775 775 product(bool, MethodFlushing, true, \
776 776 "Reclamation of zombie and not-entrant methods") \
777 777 \
778 778 develop(bool, VerifyStack, false, \
779 779 "Verify stack of each thread when it is entering a runtime call") \
780 780 \
781 781 diagnostic(bool, ForceUnreachable, false, \
782 782 "Make all non code cache addresses to be unreachable by " \
783 783 "forcing use of 64bit literal fixups") \
784 784 \
785 785 notproduct(bool, StressDerivedPointers, false, \
786 786 "Force scavenge when a derived pointer is detected on stack " \
787 787 "after rtm call") \
788 788 \
789 789 develop(bool, TraceDerivedPointers, false, \
790 790 "Trace traversal of derived pointers on stack") \
791 791 \
792 792 notproduct(bool, TraceCodeBlobStacks, false, \
793 793 "Trace stack-walk of codeblobs") \
794 794 \
795 795 product(bool, PrintJNIResolving, false, \
796 796 "Used to implement -v:jni") \
797 797 \
798 798 notproduct(bool, PrintRewrites, false, \
799 799 "Print methods that are being rewritten") \
800 800 \
801 801 product(bool, UseInlineCaches, true, \
802 802 "Use Inline Caches for virtual calls ") \
803 803 \
804 804 develop(bool, InlineArrayCopy, true, \
805 805 "Inline arraycopy native that is known to be part of " \
806 806 "base library DLL") \
807 807 \
808 808 develop(bool, InlineObjectHash, true, \
809 809 "Inline Object::hashCode() native that is known to be part " \
810 810 "of base library DLL") \
811 811 \
812 812 develop(bool, InlineNatives, true, \
813 813 "Inline natives that are known to be part of base library DLL") \
814 814 \
815 815 develop(bool, InlineMathNatives, true, \
816 816 "Inline SinD, CosD, etc.") \
817 817 \
818 818 develop(bool, InlineClassNatives, true, \
819 819 "Inline Class.isInstance, etc") \
820 820 \
821 821 develop(bool, InlineThreadNatives, true, \
822 822 "Inline Thread.currentThread, etc") \
823 823 \
824 824 develop(bool, InlineUnsafeOps, true, \
825 825 "Inline memory ops (native methods) from Unsafe") \
826 826 \
827 827 product(bool, CriticalJNINatives, true, \
828 828 "Check for critical JNI entry points") \
829 829 \
830 830 notproduct(bool, StressCriticalJNINatives, false, \
831 831 "Exercise register saving code in critical natives") \
832 832 \
833 833 product(bool, UseSSE42Intrinsics, false, \
834 834 "SSE4.2 versions of intrinsics") \
835 835 \
836 836 product(bool, UseAESIntrinsics, false, \
837 837 "Use intrinsics for AES versions of crypto") \
838 838 \
839 839 product(bool, UseSHA1Intrinsics, false, \
840 840 "Use intrinsics for SHA-1 crypto hash function. " \
841 841 "Requires that UseSHA is enabled.") \
842 842 \
843 843 product(bool, UseSHA256Intrinsics, false, \
844 844 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \
845 845 "Requires that UseSHA is enabled.") \
846 846 \
847 847 product(bool, UseSHA512Intrinsics, false, \
848 848 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \
849 849 "Requires that UseSHA is enabled.") \
850 850 \
851 851 product(bool, UseCRC32Intrinsics, false, \
852 852 "use intrinsics for java.util.zip.CRC32") \
853 853 \
854 854 product(bool, UseCRC32CIntrinsics, false, \
855 855 "use intrinsics for java.util.zip.CRC32C") \
856 856 \
857 857 product(bool, UseAdler32Intrinsics, false, \
858 858 "use intrinsics for java.util.zip.Adler32") \
859 859 \
860 860 diagnostic(ccstrlist, DisableIntrinsic, "", \
861 861 "do not expand intrinsics whose (internal) names appear here") \
862 862 \
863 863 develop(bool, TraceCallFixup, false, \
864 864 "Trace all call fixups") \
865 865 \
866 866 develop(bool, DeoptimizeALot, false, \
867 867 "Deoptimize at every exit from the runtime system") \
868 868 \
869 869 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
870 870 "A comma separated list of bcis to deoptimize at") \
871 871 \
872 872 product(bool, DeoptimizeRandom, false, \
873 873 "Deoptimize random frames on random exit from the runtime system")\
874 874 \
875 875 notproduct(bool, ZombieALot, false, \
876 876 "Create zombies (non-entrant) at exit from the runtime system") \
877 877 \
878 878 product(bool, UnlinkSymbolsALot, false, \
879 879 "Unlink unreferenced symbols from the symbol table at safepoints")\
880 880 \
881 881 notproduct(bool, WalkStackALot, false, \
882 882 "Trace stack (no print) at every exit from the runtime system") \
883 883 \
884 884 product(bool, Debugging, false, \
885 885 "Set when executing debug methods in debug.cpp " \
886 886 "(to prevent triggering assertions)") \
887 887 \
888 888 notproduct(bool, StrictSafepointChecks, trueInDebug, \
889 889 "Enable strict checks that safepoints cannot happen for threads " \
890 890 "that use No_Safepoint_Verifier") \
891 891 \
892 892 notproduct(bool, VerifyLastFrame, false, \
893 893 "Verify oops on last frame on entry to VM") \
894 894 \
895 895 develop(bool, TraceHandleAllocation, false, \
896 896 "Print out warnings when suspiciously many handles are allocated")\
897 897 \
898 898 product(bool, FailOverToOldVerifier, true, \
899 899 "Fail over to old verifier when split verifier fails") \
900 900 \
901 901 develop(bool, ShowSafepointMsgs, false, \
902 902 "Show message about safepoint synchronization") \
903 903 \
904 904 product(bool, SafepointTimeout, false, \
905 905 "Time out and warn or fail after SafepointTimeoutDelay " \
906 906 "milliseconds if failed to reach safepoint") \
907 907 \
908 908 develop(bool, DieOnSafepointTimeout, false, \
909 909 "Die upon failure to reach safepoint (see SafepointTimeout)") \
910 910 \
911 911 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
912 912 /* typically, at most a few retries are needed */ \
913 913 product(intx, SuspendRetryCount, 50, \
914 914 "Maximum retry count for an external suspend request") \
915 915 range(0, max_intx) \
916 916 \
917 917 product(intx, SuspendRetryDelay, 5, \
918 918 "Milliseconds to delay per retry (* current_retry_count)") \
919 919 range(0, max_intx) \
920 920 \
921 921 product(bool, AssertOnSuspendWaitFailure, false, \
922 922 "Assert/Guarantee on external suspend wait failure") \
923 923 \
924 924 product(bool, TraceSuspendWaitFailures, false, \
925 925 "Trace external suspend wait failures") \
926 926 \
927 927 product(bool, MaxFDLimit, true, \
928 928 "Bump the number of file descriptors to maximum in Solaris") \
929 929 \
930 930 diagnostic(bool, LogEvents, true, \
931 931 "Enable the various ring buffer event logs") \
932 932 \
933 933 diagnostic(uintx, LogEventsBufferEntries, 10, \
934 934 "Number of ring buffer event logs") \
935 935 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \
936 936 \
937 937 product(bool, BytecodeVerificationRemote, true, \
938 938 "Enable the Java bytecode verifier for remote classes") \
939 939 \
940 940 product(bool, BytecodeVerificationLocal, false, \
941 941 "Enable the Java bytecode verifier for local classes") \
942 942 \
943 943 develop(bool, ForceFloatExceptions, trueInDebug, \
944 944 "Force exceptions on FP stack under/overflow") \
945 945 \
946 946 develop(bool, VerifyStackAtCalls, false, \
947 947 "Verify that the stack pointer is unchanged after calls") \
948 948 \
949 949 develop(bool, TraceJavaAssertions, false, \
950 950 "Trace java language assertions") \
951 951 \
952 952 notproduct(bool, CheckAssertionStatusDirectives, false, \
953 953 "Temporary - see javaClasses.cpp") \
954 954 \
955 955 notproduct(bool, PrintMallocFree, false, \
956 956 "Trace calls to C heap malloc/free allocation") \
957 957 \
958 958 product(bool, PrintOopAddress, false, \
959 959 "Always print the location of the oop") \
960 960 \
961 961 notproduct(bool, VerifyCodeCache, false, \
962 962 "Verify code cache on memory allocation/deallocation") \
963 963 \
964 964 develop(bool, UseMallocOnly, false, \
965 965 "Use only malloc/free for allocation (no resource area/arena)") \
966 966 \
967 967 develop(bool, PrintMalloc, false, \
968 968 "Print all malloc/free calls") \
969 969 \
970 970 develop(bool, PrintMallocStatistics, false, \
971 971 "Print malloc/free statistics") \
972 972 \
973 973 develop(bool, ZapResourceArea, trueInDebug, \
974 974 "Zap freed resource/arena space with 0xABABABAB") \
975 975 \
976 976 notproduct(bool, ZapVMHandleArea, trueInDebug, \
977 977 "Zap freed VM handle space with 0xBCBCBCBC") \
978 978 \
979 979 develop(bool, ZapJNIHandleArea, trueInDebug, \
980 980 "Zap freed JNI handle space with 0xFEFEFEFE") \
981 981 \
982 982 notproduct(bool, ZapStackSegments, trueInDebug, \
983 983 "Zap allocated/freed stack segments with 0xFADFADED") \
984 984 \
985 985 develop(bool, ZapUnusedHeapArea, trueInDebug, \
986 986 "Zap unused heap space with 0xBAADBABE") \
987 987 \
988 988 develop(bool, CheckZapUnusedHeapArea, false, \
989 989 "Check zapping of unused heap space") \
990 990 \
991 991 develop(bool, ZapFillerObjects, trueInDebug, \
992 992 "Zap filler objects with 0xDEAFBABE") \
993 993 \
994 994 develop(bool, PrintVMMessages, true, \
995 995 "Print VM messages on console") \
996 996 \
997 997 diagnostic(bool, VerboseVerification, false, \
998 998 "Display detailed verification details") \
999 999 \
1000 1000 notproduct(uintx, ErrorHandlerTest, 0, \
1001 1001 "If > 0, provokes an error after VM initialization; the value " \
1002 1002 "determines which error to provoke. See test_error_handler() " \
1003 1003 "in debug.cpp.") \
1004 1004 \
1005 1005 notproduct(uintx, TestCrashInErrorHandler, 0, \
1006 1006 "If > 0, provokes an error inside VM error handler (a secondary " \
1007 1007 "crash). see test_error_handler() in debug.cpp.") \
1008 1008 \
1009 1009 notproduct(bool, TestSafeFetchInErrorHandler, false, \
1010 1010 "If true, tests SafeFetch inside error handler.") \
1011 1011 \
1012 1012 develop(bool, Verbose, false, \
1013 1013 "Print additional debugging information from other modes") \
1014 1014 \
1015 1015 develop(bool, PrintMiscellaneous, false, \
1016 1016 "Print uncategorized debugging information (requires +Verbose)") \
1017 1017 \
1018 1018 develop(bool, WizardMode, false, \
1019 1019 "Print much more debugging information") \
1020 1020 \
1021 1021 product(bool, ShowMessageBoxOnError, false, \
1022 1022 "Keep process alive on VM fatal error") \
1023 1023 \
1024 1024 product(bool, CreateCoredumpOnCrash, true, \
1025 1025 "Create core/mini dump on VM fatal error") \
1026 1026 \
1027 1027 product(uint64_t, ErrorLogTimeout, 2 * 60, \
1028 1028 "Timeout, in seconds, to limit the time spent on writing an " \
1029 1029 "error log in case of a crash.") \
1030 1030 range(0, (uint64_t)max_jlong/1000) \
1031 1031 \
1032 1032 product_pd(bool, UseOSErrorReporting, \
1033 1033 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
1034 1034 \
1035 1035 product(bool, SuppressFatalErrorMessage, false, \
1036 1036 "Report NO fatal error message (avoid deadlock)") \
1037 1037 \
1038 1038 product(ccstrlist, OnError, "", \
1039 1039 "Run user-defined commands on fatal error; see VMError.cpp " \
1040 1040 "for examples") \
1041 1041 \
1042 1042 product(ccstrlist, OnOutOfMemoryError, "", \
1043 1043 "Run user-defined commands on first java.lang.OutOfMemoryError") \
1044 1044 \
1045 1045 manageable(bool, HeapDumpBeforeFullGC, false, \
1046 1046 "Dump heap to file before any major stop-the-world GC") \
1047 1047 \
1048 1048 manageable(bool, HeapDumpAfterFullGC, false, \
1049 1049 "Dump heap to file after any major stop-the-world GC") \
1050 1050 \
1051 1051 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
1052 1052 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
1053 1053 \
1054 1054 manageable(ccstr, HeapDumpPath, NULL, \
1055 1055 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \
1056 1056 "directory) of the dump file (defaults to java_pid<pid>.hprof " \
1057 1057 "in the working directory)") \
1058 1058 \
1059 1059 develop(size_t, SegmentedHeapDumpThreshold, 2*G, \
1060 1060 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
1061 1061 "when the heap usage is larger than this") \
1062 1062 \
1063 1063 develop(size_t, HeapDumpSegmentSize, 1*G, \
1064 1064 "Approximate segment size when generating a segmented heap dump") \
1065 1065 \
1066 1066 develop(bool, BreakAtWarning, false, \
1067 1067 "Execute breakpoint upon encountering VM warning") \
1068 1068 \
1069 1069 develop(bool, UseFakeTimers, false, \
1070 1070 "Tell whether the VM should use system time or a fake timer") \
1071 1071 \
1072 1072 product(ccstr, NativeMemoryTracking, "off", \
1073 1073 "Native memory tracking options") \
1074 1074 \
1075 1075 diagnostic(bool, PrintNMTStatistics, false, \
1076 1076 "Print native memory tracking summary data if it is on") \
1077 1077 \
1078 1078 diagnostic(bool, LogCompilation, false, \
1079 1079 "Log compilation activity in detail to LogFile") \
1080 1080 \
1081 1081 product(bool, PrintCompilation, false, \
1082 1082 "Print compilations") \
1083 1083 \
1084 1084 diagnostic(bool, TraceNMethodInstalls, false, \
1085 1085 "Trace nmethod installation") \
1086 1086 \
1087 1087 diagnostic(intx, ScavengeRootsInCode, 2, \
1088 1088 "0: do not allow scavengable oops in the code cache; " \
1089 1089 "1: allow scavenging from the code cache; " \
1090 1090 "2: emit as many constants as the compiler can see") \
1091 1091 range(0, 2) \
1092 1092 \
1093 1093 product(bool, AlwaysRestoreFPU, false, \
1094 1094 "Restore the FPU control word after every JNI call (expensive)") \
1095 1095 \
1096 1096 diagnostic(bool, PrintCompilation2, false, \
1097 1097 "Print additional statistics per compilation") \
1098 1098 \
1099 1099 diagnostic(bool, PrintAdapterHandlers, false, \
1100 1100 "Print code generated for i2c/c2i adapters") \
1101 1101 \
1102 1102 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \
1103 1103 "Verify that i2c/c2i adapters are called properly") \
1104 1104 \
1105 1105 develop(bool, VerifyAdapterSharing, false, \
1106 1106 "Verify that the code for shared adapters is the equivalent") \
1107 1107 \
1108 1108 diagnostic(bool, PrintAssembly, false, \
1109 1109 "Print assembly code (using external disassembler.so)") \
1110 1110 \
1111 1111 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
1112 1112 "Print options string passed to disassembler.so") \
1113 1113 \
1114 1114 notproduct(bool, PrintNMethodStatistics, false, \
1115 1115 "Print a summary statistic for the generated nmethods") \
1116 1116 \
1117 1117 diagnostic(bool, PrintNMethods, false, \
1118 1118 "Print assembly code for nmethods when generated") \
1119 1119 \
1120 1120 diagnostic(bool, PrintNativeNMethods, false, \
1121 1121 "Print assembly code for native nmethods when generated") \
1122 1122 \
1123 1123 develop(bool, PrintDebugInfo, false, \
1124 1124 "Print debug information for all nmethods when generated") \
1125 1125 \
1126 1126 develop(bool, PrintRelocations, false, \
1127 1127 "Print relocation information for all nmethods when generated") \
1128 1128 \
1129 1129 develop(bool, PrintDependencies, false, \
1130 1130 "Print dependency information for all nmethods when generated") \
1131 1131 \
1132 1132 develop(bool, PrintExceptionHandlers, false, \
1133 1133 "Print exception handler tables for all nmethods when generated") \
1134 1134 \
1135 1135 develop(bool, StressCompiledExceptionHandlers, false, \
1136 1136 "Exercise compiled exception handlers") \
1137 1137 \
1138 1138 develop(bool, InterceptOSException, false, \
1139 1139 "Start debugger when an implicit OS (e.g. NULL) " \
1140 1140 "exception happens") \
1141 1141 \
1142 1142 product(bool, PrintCodeCache, false, \
1143 1143 "Print the code cache memory usage when exiting") \
1144 1144 \
1145 1145 develop(bool, PrintCodeCache2, false, \
1146 1146 "Print detailed usage information on the code cache when exiting")\
1147 1147 \
1148 1148 product(bool, PrintCodeCacheOnCompilation, false, \
1149 1149 "Print the code cache memory usage each time a method is " \
1150 1150 "compiled") \
1151 1151 \
1152 1152 diagnostic(bool, PrintStubCode, false, \
1153 1153 "Print generated stub code") \
1154 1154 \
1155 1155 product(bool, StackTraceInThrowable, true, \
1156 1156 "Collect backtrace in throwable when exception happens") \
1157 1157 \
1158 1158 product(bool, OmitStackTraceInFastThrow, true, \
1159 1159 "Omit backtraces for some 'hot' exceptions in optimized code") \
1160 1160 \
1161 1161 product(bool, ProfilerPrintByteCodeStatistics, false, \
1162 1162 "Print bytecode statistics when dumping profiler output") \
1163 1163 \
1164 1164 product(bool, ProfilerRecordPC, false, \
1165 1165 "Collect ticks for each 16 byte interval of compiled code") \
1166 1166 \
1167 1167 product(bool, ProfileVM, false, \
1168 1168 "Profile ticks that fall within VM (either in the VM Thread " \
1169 1169 "or VM code called through stubs)") \
1170 1170 \
1171 1171 product(bool, ProfileIntervals, false, \
1172 1172 "Print profiles for each interval (see ProfileIntervalsTicks)") \
1173 1173 \
1174 1174 notproduct(bool, ProfilerCheckIntervals, false, \
1175 1175 "Collect and print information on spacing of profiler ticks") \
1176 1176 \
1177 1177 product(bool, PrintWarnings, true, \
1178 1178 "Print JVM warnings to output stream") \
1179 1179 \
1180 1180 notproduct(uintx, WarnOnStalledSpinLock, 0, \
1181 1181 "Print warnings for stalled SpinLocks") \
1182 1182 \
1183 1183 product(bool, RegisterFinalizersAtInit, true, \
1184 1184 "Register finalizable objects at end of Object.<init> or " \
1185 1185 "after allocation") \
1186 1186 \
1187 1187 develop(bool, RegisterReferences, true, \
1188 1188 "Tell whether the VM should register soft/weak/final/phantom " \
1189 1189 "references") \
1190 1190 \
1191 1191 develop(bool, IgnoreRewrites, false, \
1192 1192 "Suppress rewrites of bytecodes in the oopmap generator. " \
1193 1193 "This is unsafe!") \
1194 1194 \
1195 1195 develop(bool, PrintCodeCacheExtension, false, \
1196 1196 "Print extension of code cache") \
1197 1197 \
1198 1198 develop(bool, UsePrivilegedStack, true, \
1199 1199 "Enable the security JVM functions") \
1200 1200 \
1201 1201 develop(bool, ProtectionDomainVerification, true, \
1202 1202 "Verify protection domain before resolution in system dictionary")\
1203 1203 \
1204 1204 product(bool, ClassUnloading, true, \
1205 1205 "Do unloading of classes") \
1206 1206 \
1207 1207 product(bool, ClassUnloadingWithConcurrentMark, true, \
1208 1208 "Do unloading of classes with a concurrent marking cycle") \
1209 1209 \
1210 1210 develop(bool, DisableStartThread, false, \
1211 1211 "Disable starting of additional Java threads " \
1212 1212 "(for debugging only)") \
1213 1213 \
1214 1214 develop(bool, MemProfiling, false, \
1215 1215 "Write memory usage profiling to log file") \
1216 1216 \
1217 1217 notproduct(bool, PrintSystemDictionaryAtExit, false, \
1218 1218 "Print the system dictionary at exit") \
1219 1219 \
1220 1220 experimental(intx, PredictedLoadedClassCount, 0, \
1221 1221 "Experimental: Tune loaded class cache starting size") \
1222 1222 \
1223 1223 diagnostic(bool, UnsyncloadClass, false, \
1224 1224 "Unstable: VM calls loadClass unsynchronized. Custom " \
1225 1225 "class loader must call VM synchronized for findClass " \
1226 1226 "and defineClass.") \
1227 1227 \
1228 1228 product(bool, AlwaysLockClassLoader, false, \
1229 1229 "Require the VM to acquire the class loader lock before calling " \
1230 1230 "loadClass() even for class loaders registering " \
1231 1231 "as parallel capable") \
1232 1232 \
1233 1233 product(bool, AllowParallelDefineClass, false, \
1234 1234 "Allow parallel defineClass requests for class loaders " \
1235 1235 "registering as parallel capable") \
1236 1236 \
1237 1237 product(bool, MustCallLoadClassInternal, false, \
1238 1238 "Call loadClassInternal() rather than loadClass()") \
1239 1239 \
1240 1240 product_pd(bool, DontYieldALot, \
1241 1241 "Throw away obvious excess yield calls") \
1242 1242 \
1243 1243 product_pd(bool, ConvertSleepToYield, \
1244 1244 "Convert sleep(0) to thread yield " \
1245 1245 "(may be off for Solaris to improve GUI)") \
1246 1246 \
1247 1247 product(bool, ConvertYieldToSleep, false, \
1248 1248 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
1249 1249 "behavior") \
1250 1250 \
1251 1251 develop(bool, UseDetachedThreads, true, \
1252 1252 "Use detached threads that are recycled upon termination " \
1253 1253 "(for Solaris only)") \
1254 1254 \
1255 1255 product(bool, UseLWPSynchronization, true, \
1256 1256 "Use LWP-based instead of libthread-based synchronization " \
1257 1257 "(SPARC only)") \
1258 1258 \
1259 1259 experimental(ccstr, SyncKnobs, NULL, \
1260 1260 "(Unstable) Various monitor synchronization tunables") \
1261 1261 \
1262 1262 experimental(intx, EmitSync, 0, \
1263 1263 "(Unsafe, Unstable) " \
1264 1264 "Control emission of inline sync fast-path code") \
1265 1265 \
1266 1266 product(intx, MonitorBound, 0, "Bound Monitor population") \
1267 1267 range(0, max_jint) \
1268 1268 \
1269 1269 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
1270 1270 \
1271 1271 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \
1272 1272 "Experimental Sync flags") \
1273 1273 \
1274 1274 experimental(intx, SyncVerbose, 0, "(Unstable)") \
1275 1275 \
1276 1276 diagnostic(bool, InlineNotify, true, "intrinsify subset of notify") \
1277 1277 \
1278 1278 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \
1279 1279 \
1280 1280 experimental(intx, hashCode, 5, \
1281 1281 "(Unstable) select hashCode generation algorithm") \
1282 1282 \
1283 1283 experimental(intx, WorkAroundNPTLTimedWaitHang, 0, \
1284 1284 "(Unstable, Linux-specific) " \
1285 1285 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \
1286 1286 \
1287 1287 product(bool, FilterSpuriousWakeups, true, \
1288 1288 "When true prevents OS-level spurious, or premature, wakeups " \
1289 1289 "from Object.wait (Ignored for Windows)") \
1290 1290 \
1291 1291 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \
1292 1292 \
1293 1293 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \
1294 1294 \
1295 1295 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \
1296 1296 \
1297 1297 develop(bool, UsePthreads, false, \
1298 1298 "Use pthread-based instead of libthread-based synchronization " \
1299 1299 "(SPARC only)") \
1300 1300 \
1301 1301 product(bool, ReduceSignalUsage, false, \
1302 1302 "Reduce the use of OS signals in Java and/or the VM") \
1303 1303 \
1304 1304 develop_pd(bool, ShareVtableStubs, \
1305 1305 "Share vtable stubs (smaller code but worse branch prediction") \
1306 1306 \
1307 1307 develop(bool, LoadLineNumberTables, true, \
1308 1308 "Tell whether the class file parser loads line number tables") \
1309 1309 \
1310 1310 develop(bool, LoadLocalVariableTables, true, \
1311 1311 "Tell whether the class file parser loads local variable tables") \
1312 1312 \
1313 1313 develop(bool, LoadLocalVariableTypeTables, true, \
1314 1314 "Tell whether the class file parser loads local variable type" \
1315 1315 "tables") \
1316 1316 \
1317 1317 product(bool, AllowUserSignalHandlers, false, \
1318 1318 "Do not complain if the application installs signal handlers " \
1319 1319 "(Solaris & Linux only)") \
1320 1320 \
1321 1321 product(bool, UseSignalChaining, true, \
1322 1322 "Use signal-chaining to invoke signal handlers installed " \
1323 1323 "by the application (Solaris & Linux only)") \
1324 1324 \
1325 1325 product(bool, AllowJNIEnvProxy, false, \
1326 1326 "Allow JNIEnv proxies for jdbx") \
1327 1327 \
1328 1328 product(bool, RestoreMXCSROnJNICalls, false, \
1329 1329 "Restore MXCSR when returning from JNI calls") \
1330 1330 \
1331 1331 product(bool, CheckJNICalls, false, \
1332 1332 "Verify all arguments to JNI calls") \
1333 1333 \
1334 1334 product(bool, CheckEndorsedAndExtDirs, false, \
1335 1335 "Verify the endorsed and extension directories are not used") \
1336 1336 \
1337 1337 product(bool, UseFastJNIAccessors, true, \
1338 1338 "Use optimized versions of Get<Primitive>Field") \
1339 1339 \
1340 1340 product(intx, MaxJNILocalCapacity, 65536, \
1341 1341 "Maximum allowable local JNI handle capacity to " \
1342 1342 "EnsureLocalCapacity() and PushLocalFrame(), " \
1343 1343 "where <= 0 is unlimited, default: 65536") \
1344 1344 range(min_intx, max_intx) \
1345 1345 \
1346 1346 product(bool, EagerXrunInit, false, \
1347 1347 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1348 1348 "but not all -Xrun libraries may support the state of the VM " \
1349 1349 "at this time") \
1350 1350 \
1351 1351 product(bool, PreserveAllAnnotations, false, \
1352 1352 "Preserve RuntimeInvisibleAnnotations as well " \
1353 1353 "as RuntimeVisibleAnnotations") \
1354 1354 \
1355 1355 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1356 1356 "Number of OutOfMemoryErrors preallocated with backtrace") \
1357 1357 \
1358 1358 product(bool, UseXMMForArrayCopy, false, \
1359 1359 "Use SSE2 MOVQ instruction for Arraycopy") \
1360 1360 \
1361 1361 product(intx, FieldsAllocationStyle, 1, \
1362 1362 "0 - type based with oops first, " \
1363 1363 "1 - with oops last, " \
1364 1364 "2 - oops in super and sub classes are together") \
1365 1365 range(0, 2) \
1366 1366 \
1367 1367 product(bool, CompactFields, true, \
1368 1368 "Allocate nonstatic fields in gaps between previous fields") \
1369 1369 \
1370 1370 notproduct(bool, PrintFieldLayout, false, \
1371 1371 "Print field layout for each class") \
1372 1372 \
1373 1373 /* Need to limit the extent of the padding to reasonable size. */\
1374 1374 /* 8K is well beyond the reasonable HW cache line size, even with */\
1375 1375 /* aggressive prefetching, while still leaving the room for segregating */\
1376 1376 /* among the distinct pages. */\
1377 1377 product(intx, ContendedPaddingWidth, 128, \
1378 1378 "How many bytes to pad the fields/classes marked @Contended with")\
1379 1379 range(0, 8192) \
1380 1380 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \
1381 1381 \
1382 1382 product(bool, EnableContended, true, \
1383 1383 "Enable @Contended annotation support") \
1384 1384 \
1385 1385 product(bool, RestrictContended, true, \
1386 1386 "Restrict @Contended to trusted classes") \
1387 1387 \
1388 1388 product(bool, UseBiasedLocking, true, \
1389 1389 "Enable biased locking in JVM") \
1390 1390 \
1391 1391 product(intx, BiasedLockingStartupDelay, 4000, \
1392 1392 "Number of milliseconds to wait before enabling biased locking") \
1393 1393 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \
1394 1394 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \
1395 1395 \
1396 1396 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1397 1397 "Print statistics of biased locking in JVM") \
1398 1398 \
1399 1399 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1400 1400 "Threshold of number of revocations per type to try to " \
1401 1401 "rebias all objects in the heap of that type") \
1402 1402 range(0, max_intx) \
1403 1403 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \
1404 1404 \
1405 1405 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1406 1406 "Threshold of number of revocations per type to permanently " \
1407 1407 "revoke biases of all objects in the heap of that type") \
1408 1408 range(0, max_intx) \
1409 1409 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \
1410 1410 \
1411 1411 product(intx, BiasedLockingDecayTime, 25000, \
1412 1412 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1413 1413 "type after previous bulk rebias") \
1414 1414 range(500, max_intx) \
1415 1415 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \
1416 1416 \
1417 1417 product(bool, ExitOnOutOfMemoryError, false, \
1418 1418 "JVM exits on the first occurrence of an out-of-memory error") \
1419 1419 \
1420 1420 product(bool, CrashOnOutOfMemoryError, false, \
1421 1421 "JVM aborts, producing an error log and core/mini dump, on the " \
1422 1422 "first occurrence of an out-of-memory error") \
1423 1423 \
1424 1424 /* tracing */ \
1425 1425 \
1426 1426 develop(bool, StressRewriter, false, \
1427 1427 "Stress linktime bytecode rewriting") \
1428 1428 \
1429 1429 product(ccstr, TraceJVMTI, NULL, \
1430 1430 "Trace flags for JVMTI functions and events") \
1431 1431 \
1432 1432 /* This option can change an EMCP method into an obsolete method. */ \
1433 1433 /* This can affect tests that except specific methods to be EMCP. */ \
1434 1434 /* This option should be used with caution. */ \
1435 1435 product(bool, StressLdcRewrite, false, \
1436 1436 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1437 1437 \
1438 1438 product(uintx, TraceRedefineClasses, 0, \
1439 1439 "Trace level for JVMTI RedefineClasses") \
1440 1440 range(0, 0xFFFFFFFF) \
1441 1441 \
1442 1442 /* change to false by default sometime after Mustang */ \
1443 1443 product(bool, VerifyMergedCPBytecodes, true, \
1444 1444 "Verify bytecodes after RedefineClasses constant pool merging") \
1445 1445 \
1446 1446 develop(bool, TraceJNIHandleAllocation, false, \
1447 1447 "Trace allocation/deallocation of JNI handle blocks") \
1448 1448 \
1449 1449 develop(bool, TraceBytecodes, false, \
1450 1450 "Trace bytecode execution") \
1451 1451 \
1452 1452 product(bool, TraceExceptions, false, \
1453 1453 "Trace exceptions") \
1454 1454 \
1455 1455 develop(bool, TraceICs, false, \
1456 1456 "Trace inline cache changes") \
1457 1457 \
1458 1458 notproduct(bool, TraceInvocationCounterOverflow, false, \
1459 1459 "Trace method invocation counter overflow") \
1460 1460 \
1461 1461 develop(bool, TraceInlineCacheClearing, false, \
1462 1462 "Trace clearing of inline caches in nmethods") \
1463 1463 \
1464 1464 develop(bool, TraceDependencies, false, \
1465 1465 "Trace dependencies") \
1466 1466 \
1467 1467 develop(bool, VerifyDependencies, trueInDebug, \
1468 1468 "Exercise and verify the compilation dependency mechanism") \
1469 1469 \
1470 1470 develop(bool, TraceNewOopMapGeneration, false, \
1471 1471 "Trace OopMapGeneration") \
1472 1472 \
1473 1473 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1474 1474 "Trace OopMapGeneration: print detailed cell states") \
1475 1475 \
1476 1476 develop(bool, TimeOopMap, false, \
1477 1477 "Time calls to GenerateOopMap::compute_map() in sum") \
1478 1478 \
1479 1479 develop(bool, TimeOopMap2, false, \
1480 1480 "Time calls to GenerateOopMap::compute_map() individually") \
1481 1481 \
1482 1482 develop(bool, TraceMonitorMismatch, false, \
1483 1483 "Trace monitor matching failures during OopMapGeneration") \
1484 1484 \
1485 1485 develop(bool, TraceOopMapRewrites, false, \
1486 1486 "Trace rewriting of method oops during oop map generation") \
1487 1487 \
1488 1488 develop(bool, TraceICBuffer, false, \
1489 1489 "Trace usage of IC buffer") \
1490 1490 \
1491 1491 develop(bool, TraceCompiledIC, false, \
1492 1492 "Trace changes of compiled IC") \
1493 1493 \
1494 1494 develop(bool, TraceStartupTime, false, \
1495 1495 "Trace setup time") \
1496 1496 \
1497 1497 develop(bool, TraceProtectionDomainVerification, false, \
1498 1498 "Trace protection domain verification") \
1499 1499 \
1500 1500 develop(bool, TraceClearedExceptions, false, \
1501 1501 "Print when an exception is forcibly cleared") \
1502 1502 \
1503 1503 product(bool, TraceClassResolution, false, \
1504 1504 "Trace all constant pool resolutions (for debugging)") \
1505 1505 \
1506 1506 product(bool, TraceBiasedLocking, false, \
1507 1507 "Trace biased locking in JVM") \
1508 1508 \
1509 1509 product(bool, TraceMonitorInflation, false, \
1510 1510 "Trace monitor inflation in JVM") \
1511 1511 \
1512 1512 /* gc */ \
1513 1513 \
1514 1514 product(bool, UseSerialGC, false, \
1515 1515 "Use the Serial garbage collector") \
1516 1516 \
1517 1517 product(bool, UseG1GC, false, \
1518 1518 "Use the Garbage-First garbage collector") \
1519 1519 \
1520 1520 product(bool, UseParallelGC, false, \
1521 1521 "Use the Parallel Scavenge garbage collector") \
1522 1522 \
1523 1523 product(bool, UseParallelOldGC, false, \
1524 1524 "Use the Parallel Old garbage collector") \
1525 1525 \
1526 1526 product(uintx, HeapMaximumCompactionInterval, 20, \
1527 1527 "How often should we maximally compact the heap (not allowing " \
1528 1528 "any dead space)") \
1529 1529 range(0, max_uintx) \
1530 1530 \
1531 1531 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1532 1532 "The collection count for the first maximum compaction") \
1533 1533 range(0, max_uintx) \
1534 1534 \
1535 1535 product(bool, UseMaximumCompactionOnSystemGC, true, \
1536 1536 "Use maximum compaction in the Parallel Old garbage collector " \
1537 1537 "for a system GC") \
1538 1538 \
1539 1539 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1540 1540 "The mean used by the parallel compact dead wood " \
1541 1541 "limiter (a number between 0-100)") \
1542 1542 range(0, 100) \
1543 1543 \
1544 1544 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1545 1545 "The standard deviation used by the parallel compact dead wood " \
1546 1546 "limiter (a number between 0-100)") \
1547 1547 range(0, 100) \
1548 1548 \
1549 1549 product(uint, ParallelGCThreads, 0, \
1550 1550 "Number of parallel threads parallel gc will use") \
1551 1551 constraint(ParallelGCThreadsConstraintFunc,AfterErgo) \
1552 1552 \
1553 1553 diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true, \
1554 1554 "Use semaphore synchronization for the GC Threads, " \
1555 1555 "instead of synchronization based on mutexes") \
1556 1556 \
1557 1557 product(bool, UseDynamicNumberOfGCThreads, false, \
1558 1558 "Dynamically choose the number of parallel threads " \
1559 1559 "parallel gc will use") \
1560 1560 \
1561 1561 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
1562 1562 "Force dynamic selection of the number of " \
1563 1563 "parallel threads parallel gc will use to aid debugging") \
1564 1564 \
1565 1565 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \
1566 1566 "Size of heap (bytes) per GC thread used in calculating the " \
1567 1567 "number of GC threads") \
1568 1568 range((size_t)os::vm_page_size(), (size_t)max_uintx) \
1569 1569 \
1570 1570 product(uint, ConcGCThreads, 0, \
1571 1571 "Number of threads concurrent gc will use") \
1572 1572 constraint(ConcGCThreadsConstraintFunc,AfterErgo) \
1573 1573 \
1574 1574 product(uintx, GCTaskTimeStampEntries, 200, \
1575 1575 "Number of time stamp entries per gc worker thread") \
1576 1576 range(1, max_uintx) \
1577 1577 \
1578 1578 product(bool, AlwaysTenure, false, \
1579 1579 "Always tenure objects in eden (ParallelGC only)") \
1580 1580 \
1581 1581 product(bool, NeverTenure, false, \
1582 1582 "Never tenure objects in eden, may tenure on overflow " \
1583 1583 "(ParallelGC only)") \
1584 1584 \
1585 1585 product(bool, ScavengeBeforeFullGC, true, \
1586 1586 "Scavenge youngest generation before each full GC.") \
1587 1587 \
1588 1588 product(bool, UseConcMarkSweepGC, false, \
1589 1589 "Use Concurrent Mark-Sweep GC in the old generation") \
1590 1590 \
1591 1591 product(bool, ExplicitGCInvokesConcurrent, false, \
1592 1592 "A System.gc() request invokes a concurrent collection; " \
1593 1593 "(effective only when using concurrent collectors)") \
1594 1594 \
1595 1595 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1596 1596 "A System.gc() request invokes a concurrent collection and " \
1597 1597 "also unloads classes during such a concurrent gc cycle " \
1598 1598 "(effective only when UseConcMarkSweepGC)") \
1599 1599 \
1600 1600 product(bool, GCLockerInvokesConcurrent, false, \
1601 1601 "The exit of a JNI critical section necessitating a scavenge, " \
1602 1602 "also kicks off a background concurrent collection") \
1603 1603 \
1604 1604 product(uintx, GCLockerEdenExpansionPercent, 5, \
1605 1605 "How much the GC can expand the eden by while the GC locker " \
1606 1606 "is active (as a percentage)") \
1607 1607 range(0, 100) \
1608 1608 \
1609 1609 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \
1610 1610 "Number of times to retry allocations when " \
1611 1611 "blocked by the GC locker") \
1612 1612 range(0, max_uintx) \
1613 1613 \
1614 1614 product(bool, UseCMSBestFit, true, \
1615 1615 "Use CMS best fit allocation strategy") \
1616 1616 \
1617 1617 product(bool, UseParNewGC, false, \
1618 1618 "Use parallel threads in the new generation") \
1619 1619 \
1620 1620 product(uintx, ParallelGCBufferWastePct, 10, \
1621 1621 "Wasted fraction of parallel allocation buffer") \
1622 1622 range(0, 100) \
1623 1623 \
1624 1624 product(uintx, TargetPLABWastePct, 10, \
1625 1625 "Target wasted space in last buffer as percent of overall " \
1626 1626 "allocation") \
1627 1627 range(1, 100) \
1628 1628 \
1629 1629 product(uintx, PLABWeight, 75, \
1630 1630 "Percentage (0-100) used to weight the current sample when " \
1631 1631 "computing exponentially decaying average for ResizePLAB") \
1632 1632 range(0, 100) \
1633 1633 \
1634 1634 product(bool, ResizePLAB, true, \
1635 1635 "Dynamically resize (survivor space) promotion LAB's") \
1636 1636 \
1637 1637 product(intx, ParGCArrayScanChunk, 50, \
1638 1638 "Scan a subset of object array and push remainder, if array is " \
1639 1639 "bigger than this") \
1640 1640 range(1, max_intx) \
1641 1641 \
1642 1642 product(bool, ParGCUseLocalOverflow, false, \
1643 1643 "Instead of a global overflow list, use local overflow stacks") \
1644 1644 \
1645 1645 product(bool, ParGCTrimOverflow, true, \
1646 1646 "Eagerly trim the local overflow lists " \
1647 1647 "(when ParGCUseLocalOverflow)") \
1648 1648 \
1649 1649 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1650 1650 "Simulate work queue overflow in ParNew") \
1651 1651 \
1652 1652 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1653 1653 "An `interval' counter that determines how frequently " \
1654 1654 "we simulate overflow; a smaller number increases frequency") \
1655 1655 \
1656 1656 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1657 1657 "The desired number of objects to claim from the overflow list") \
1658 1658 range(0, max_uintx) \
1659 1659 \
1660 1660 diagnostic(uintx, ParGCStridesPerThread, 2, \
1661 1661 "The number of strides per worker thread that we divide up the " \
1662 1662 "card table scanning work into") \
1663 1663 range(1, max_uintx) \
1664 1664 constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \
1665 1665 \
1666 1666 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
1667 1667 "The number of cards in each chunk of the parallel chunks used " \
1668 1668 "during card table scanning") \
1669 1669 range(1, max_intx) \
1670 1670 \
1671 1671 product(uintx, OldPLABWeight, 50, \
1672 1672 "Percentage (0-100) used to weight the current sample when " \
1673 1673 "computing exponentially decaying average for resizing " \
1674 1674 "OldPLABSize") \
1675 1675 range(0, 100) \
1676 1676 \
1677 1677 product(bool, ResizeOldPLAB, true, \
1678 1678 "Dynamically resize (old gen) promotion LAB's") \
1679 1679 \
1680 1680 product(size_t, CMSOldPLABMax, 1024, \
1681 1681 "Maximum size of CMS gen promotion LAB caches per worker " \
1682 1682 "per block size") \
1683 1683 range(1, max_uintx) \
1684 1684 constraint(CMSOldPLABMaxConstraintFunc,AfterMemoryInit) \
1685 1685 \
1686 1686 product(size_t, CMSOldPLABMin, 16, \
1687 1687 "Minimum size of CMS gen promotion LAB caches per worker " \
1688 1688 "per block size") \
1689 1689 range(1, max_uintx) \
1690 1690 constraint(CMSOldPLABMinConstraintFunc,AfterMemoryInit) \
1691 1691 \
1692 1692 product(uintx, CMSOldPLABNumRefills, 4, \
1693 1693 "Nominal number of refills of CMS gen promotion LAB cache " \
1694 1694 "per worker per block size") \
1695 1695 range(1, max_uintx) \
1696 1696 \
1697 1697 product(bool, CMSOldPLABResizeQuicker, false, \
1698 1698 "React on-the-fly during a scavenge to a sudden " \
1699 1699 "change in block demand rate") \
1700 1700 \
1701 1701 product(uintx, CMSOldPLABToleranceFactor, 4, \
1702 1702 "The tolerance of the phase-change detector for on-the-fly " \
1703 1703 "PLAB resizing during a scavenge") \
1704 1704 range(1, max_uintx) \
1705 1705 \
1706 1706 product(uintx, CMSOldPLABReactivityFactor, 2, \
1707 1707 "The gain in the feedback loop for on-the-fly PLAB resizing " \
1708 1708 "during a scavenge") \
1709 1709 range(1, max_uintx) \
1710 1710 \
1711 1711 product(bool, AlwaysPreTouch, false, \
1712 1712 "Force all freshly committed pages to be pre-touched") \
1713 1713 \
1714 1714 product_pd(size_t, CMSYoungGenPerWorker, \
1715 1715 "The maximum size of young gen chosen by default per GC worker " \
1716 1716 "thread available") \
1717 1717 range(1, max_uintx) \
1718 1718 \
1719 1719 product(uintx, CMSIncrementalSafetyFactor, 10, \
1720 1720 "Percentage (0-100) used to add conservatism when computing the " \
1721 1721 "duty cycle") \
1722 1722 range(0, 100) \
1723 1723 \
1724 1724 product(uintx, CMSExpAvgFactor, 50, \
1725 1725 "Percentage (0-100) used to weight the current sample when " \
1726 1726 "computing exponential averages for CMS statistics") \
1727 1727 range(0, 100) \
1728 1728 \
1729 1729 product(uintx, CMS_FLSWeight, 75, \
1730 1730 "Percentage (0-100) used to weight the current sample when " \
1731 1731 "computing exponentially decaying averages for CMS FLS " \
1732 1732 "statistics") \
1733 1733 range(0, 100) \
1734 1734 \
1735 1735 product(uintx, CMS_FLSPadding, 1, \
1736 1736 "The multiple of deviation from mean to use for buffering " \
1737 1737 "against volatility in free list demand") \
1738 1738 range(0, max_juint) \
1739 1739 \
1740 1740 product(uintx, FLSCoalescePolicy, 2, \
1741 1741 "CMS: aggressiveness level for coalescing, increasing " \
1742 1742 "from 0 to 4") \
1743 1743 range(0, 4) \
1744 1744 \
1745 1745 product(bool, FLSAlwaysCoalesceLarge, false, \
1746 1746 "CMS: larger free blocks are always available for coalescing") \
1747 1747 \
1748 1748 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1749 1749 "CMS: the smaller the percentage the greater the coalescing " \
1750 1750 "force") \
1751 1751 range(0.0, 1.0) \
1752 1752 \
1753 1753 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1754 1754 "CMS: the factor by which to inflate estimated demand of small " \
1755 1755 "block sizes to prevent coalescing with an adjoining block") \
1756 1756 range(0.0, DBL_MAX) \
1757 1757 \
1758 1758 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1759 1759 "CMS: the factor by which to inflate estimated demand of large " \
1760 1760 "block sizes to prevent coalescing with an adjoining block") \
1761 1761 range(0.0, DBL_MAX) \
1762 1762 \
1763 1763 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1764 1764 "CMS: the factor by which to inflate estimated demand of small " \
1765 1765 "block sizes to prevent splitting to supply demand for smaller " \
1766 1766 "blocks") \
1767 1767 range(0.0, DBL_MAX) \
1768 1768 \
1769 1769 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1770 1770 "CMS: the factor by which to inflate estimated demand of large " \
1771 1771 "block sizes to prevent splitting to supply demand for smaller " \
1772 1772 "blocks") \
1773 1773 range(0.0, DBL_MAX) \
1774 1774 \
1775 1775 product(bool, CMSExtrapolateSweep, false, \
1776 1776 "CMS: cushion for block demand during sweep") \
1777 1777 \
1778 1778 product(uintx, CMS_SweepWeight, 75, \
1779 1779 "Percentage (0-100) used to weight the current sample when " \
1780 1780 "computing exponentially decaying average for inter-sweep " \
1781 1781 "duration") \
1782 1782 range(0, 100) \
1783 1783 \
1784 1784 product(uintx, CMS_SweepPadding, 1, \
1785 1785 "The multiple of deviation from mean to use for buffering " \
1786 1786 "against volatility in inter-sweep duration") \
1787 1787 range(0, max_juint) \
1788 1788 \
1789 1789 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1790 1790 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1791 1791 "duration exceeds this threshold in milliseconds") \
1792 1792 range(0, max_uintx) \
1793 1793 \
1794 1794 product(bool, CMSClassUnloadingEnabled, true, \
1795 1795 "Whether class unloading enabled when using CMS GC") \
1796 1796 \
1797 1797 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1798 1798 "When CMS class unloading is enabled, the maximum CMS cycle " \
1799 1799 "count for which classes may not be unloaded") \
1800 1800 range(0, max_uintx) \
1801 1801 \
1802 1802 product(uintx, CMSIndexedFreeListReplenish, 4, \
1803 1803 "Replenish an indexed free list with this number of chunks") \
1804 1804 range(1, max_uintx) \
1805 1805 \
1806 1806 product(bool, CMSReplenishIntermediate, true, \
1807 1807 "Replenish all intermediate free-list caches") \
1808 1808 \
1809 1809 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1810 1810 "When satisfying batched demand, split blocks from the " \
1811 1811 "IndexedFreeList whose size is a multiple of requested size") \
1812 1812 \
1813 1813 product(bool, CMSLoopWarn, false, \
1814 1814 "Warn in case of excessive CMS looping") \
1815 1815 \
1816 1816 /* where does the range max value of (max_jint - 1) come from? */ \
1817 1817 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1818 1818 "Maximum size of marking stack") \
1819 1819 range(1, (max_jint - 1)) \
1820 1820 \
1821 1821 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1822 1822 "Size of marking stack") \
1823 1823 constraint(MarkStackSizeConstraintFunc,AfterErgo) \
1824 1824 \
1825 1825 notproduct(bool, CMSMarkStackOverflowALot, false, \
1826 1826 "Simulate frequent marking stack / work queue overflow") \
1827 1827 \
1828 1828 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1829 1829 "An \"interval\" counter that determines how frequently " \
1830 1830 "to simulate overflow; a smaller number increases frequency") \
1831 1831 \
1832 1832 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1833 1833 "Maximum number of abortable preclean iterations, if > 0") \
1834 1834 range(0, max_uintx) \
1835 1835 \
1836 1836 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1837 1837 "Maximum time in abortable preclean (in milliseconds)") \
1838 1838 range(0, max_intx) \
1839 1839 \
1840 1840 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1841 1841 "Nominal minimum work per abortable preclean iteration") \
1842 1842 range(0, max_uintx) \
1843 1843 \
1844 1844 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
1845 1845 "Time that we sleep between iterations when not given " \
1846 1846 "enough work per iteration") \
1847 1847 range(0, max_intx) \
1848 1848 \
1849 1849 product(size_t, CMSRescanMultiple, 32, \
1850 1850 "Size (in cards) of CMS parallel rescan task") \
1851 1851 range(1, max_uintx) \
1852 1852 \
1853 1853 product(size_t, CMSConcMarkMultiple, 32, \
1854 1854 "Size (in cards) of CMS concurrent MT marking task") \
1855 1855 range(1, max_uintx) \
1856 1856 \
1857 1857 product(bool, CMSAbortSemantics, false, \
1858 1858 "Whether abort-on-overflow semantics is implemented") \
1859 1859 \
1860 1860 product(bool, CMSParallelInitialMarkEnabled, true, \
1861 1861 "Use the parallel initial mark.") \
1862 1862 \
1863 1863 product(bool, CMSParallelRemarkEnabled, true, \
1864 1864 "Whether parallel remark enabled (only if ParNewGC)") \
1865 1865 \
1866 1866 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1867 1867 "Whether parallel remark of survivor space " \
1868 1868 "enabled (effective only if CMSParallelRemarkEnabled)") \
1869 1869 \
1870 1870 product(bool, CMSPLABRecordAlways, true, \
1871 1871 "Always record survivor space PLAB boundaries (effective only " \
1872 1872 "if CMSParallelSurvivorRemarkEnabled)") \
1873 1873 \
1874 1874 product(bool, CMSEdenChunksRecordAlways, true, \
1875 1875 "Always record eden chunks used for the parallel initial mark " \
1876 1876 "or remark of eden") \
1877 1877 \
1878 1878 product(bool, CMSConcurrentMTEnabled, true, \
1879 1879 "Whether multi-threaded concurrent work enabled " \
1880 1880 "(effective only if ParNewGC)") \
1881 1881 \
1882 1882 product(bool, CMSPrecleaningEnabled, true, \
1883 1883 "Whether concurrent precleaning enabled") \
1884 1884 \
1885 1885 product(uintx, CMSPrecleanIter, 3, \
1886 1886 "Maximum number of precleaning iteration passes") \
1887 1887 range(0, 9) \
1888 1888 \
1889 1889 product(uintx, CMSPrecleanDenominator, 3, \
1890 1890 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1891 1891 "ratio") \
1892 1892 range(1, max_uintx) \
1893 1893 constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \
1894 1894 \
1895 1895 product(uintx, CMSPrecleanNumerator, 2, \
1896 1896 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1897 1897 "ratio") \
1898 1898 range(0, max_uintx-1) \
1899 1899 constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \
1900 1900 \
1901 1901 product(bool, CMSPrecleanRefLists1, true, \
1902 1902 "Preclean ref lists during (initial) preclean phase") \
1903 1903 \
1904 1904 product(bool, CMSPrecleanRefLists2, false, \
1905 1905 "Preclean ref lists during abortable preclean phase") \
1906 1906 \
1907 1907 product(bool, CMSPrecleanSurvivors1, false, \
1908 1908 "Preclean survivors during (initial) preclean phase") \
1909 1909 \
1910 1910 product(bool, CMSPrecleanSurvivors2, true, \
1911 1911 "Preclean survivors during abortable preclean phase") \
1912 1912 \
1913 1913 product(uintx, CMSPrecleanThreshold, 1000, \
1914 1914 "Do not iterate again if number of dirty cards is less than this")\
1915 1915 range(100, max_uintx) \
1916 1916 \
1917 1917 product(bool, CMSCleanOnEnter, true, \
1918 1918 "Clean-on-enter optimization for reducing number of dirty cards") \
1919 1919 \
1920 1920 product(uintx, CMSRemarkVerifyVariant, 1, \
1921 1921 "Choose variant (1,2) of verification following remark") \
1922 1922 range(1, 2) \
1923 1923 \
1924 1924 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1925 1925 "If Eden size is below this, do not try to schedule remark") \
1926 1926 range(0, max_uintx) \
1927 1927 \
1928 1928 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1929 1929 "The Eden occupancy percentage (0-100) at which " \
1930 1930 "to try and schedule remark pause") \
1931 1931 range(0, 100) \
1932 1932 \
1933 1933 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1934 1934 "Start sampling eden top at least before young gen " \
1935 1935 "occupancy reaches 1/<ratio> of the size at which " \
1936 1936 "we plan to schedule remark") \
1937 1937 range(1, max_uintx) \
1938 1938 \
1939 1939 product(uintx, CMSSamplingGrain, 16*K, \
1940 1940 "The minimum distance between eden samples for CMS (see above)") \
1941 1941 range(1, max_uintx) \
1942 1942 \
1943 1943 product(bool, CMSScavengeBeforeRemark, false, \
1944 1944 "Attempt scavenge before the CMS remark step") \
1945 1945 \
1946 1946 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1947 1947 "Don't drain below this size per parallel worker/thief") \
1948 1948 range(1, max_juint) \
1949 1949 constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \
1950 1950 \
1951 1951 manageable(intx, CMSWaitDuration, 2000, \
1952 1952 "Time in milliseconds that CMS thread waits for young GC") \
1953 1953 range(min_jint, max_jint) \
1954 1954 \
1955 1955 develop(uintx, CMSCheckInterval, 1000, \
1956 1956 "Interval in milliseconds that CMS thread checks if it " \
1957 1957 "should start a collection cycle") \
1958 1958 \
1959 1959 product(bool, CMSYield, true, \
1960 1960 "Yield between steps of CMS") \
1961 1961 \
1962 1962 product(size_t, CMSBitMapYieldQuantum, 10*M, \
1963 1963 "Bitmap operations should process at most this many bits " \
1964 1964 "between yields") \
1965 1965 range(1, max_uintx) \
1966 1966 \
1967 1967 product(bool, CMSPrintChunksInDump, false, \
1968 1968 "If logging for the \"gc\" and \"promotion\" tags is enabled on" \
1969 1969 "trace level include more detailed information about the" \
1970 1970 "free chunks") \
1971 1971 \
1972 1972 product(bool, CMSPrintObjectsInDump, false, \
1973 1973 "If logging for the \"gc\" and \"promotion\" tags is enabled on" \
1974 1974 "trace level include more detailed information about the" \
1975 1975 "allocated objects") \
1976 1976 \
1977 1977 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1978 1978 "Verify that all references across the FLS boundary " \
1979 1979 "are to valid objects") \
1980 1980 \
1981 1981 diagnostic(bool, FLSVerifyLists, false, \
1982 1982 "Do lots of (expensive) FreeListSpace verification") \
1983 1983 \
1984 1984 diagnostic(bool, FLSVerifyIndexTable, false, \
1985 1985 "Do lots of (expensive) FLS index table verification") \
1986 1986 \
1987 1987 develop(bool, FLSVerifyDictionary, false, \
1988 1988 "Do lots of (expensive) FLS dictionary verification") \
1989 1989 \
1990 1990 develop(bool, VerifyBlockOffsetArray, false, \
1991 1991 "Do (expensive) block offset array verification") \
1992 1992 \
1993 1993 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
1994 1994 "Maintain _unallocated_block in BlockOffsetArray " \
1995 1995 "(currently applicable only to CMS collector)") \
1996 1996 \
1997 1997 product(intx, RefDiscoveryPolicy, 0, \
1998 1998 "Select type of reference discovery policy: " \
1999 1999 "reference-based(0) or referent-based(1)") \
2000 2000 range(ReferenceProcessor::DiscoveryPolicyMin, \
2001 2001 ReferenceProcessor::DiscoveryPolicyMax) \
2002 2002 \
2003 2003 product(bool, ParallelRefProcEnabled, false, \
2004 2004 "Enable parallel reference processing whenever possible") \
2005 2005 \
2006 2006 product(bool, ParallelRefProcBalancingEnabled, true, \
2007 2007 "Enable balancing of reference processing queues") \
2008 2008 \
2009 2009 product(uintx, CMSTriggerRatio, 80, \
2010 2010 "Percentage of MinHeapFreeRatio in CMS generation that is " \
2011 2011 "allocated before a CMS collection cycle commences") \
2012 2012 range(0, 100) \
2013 2013 \
2014 2014 product(uintx, CMSBootstrapOccupancy, 50, \
2015 2015 "Percentage CMS generation occupancy at which to " \
2016 2016 "initiate CMS collection for bootstrapping collection stats") \
2017 2017 range(0, 100) \
2018 2018 \
2019 2019 product(intx, CMSInitiatingOccupancyFraction, -1, \
2020 2020 "Percentage CMS generation occupancy to start a CMS collection " \
2021 2021 "cycle. A negative value means that CMSTriggerRatio is used") \
2022 2022 range(min_intx, 100) \
2023 2023 \
2024 2024 product(uintx, InitiatingHeapOccupancyPercent, 45, \
2025 2025 "Percentage of the (entire) heap occupancy to start a " \
2026 2026 "concurrent GC cycle. It is used by GCs that trigger a " \
2027 2027 "concurrent GC cycle based on the occupancy of the entire heap, " \
2028 2028 "not just one of the generations (e.g., G1). A value of 0 " \
2029 2029 "denotes 'do constant GC cycles'.") \
2030 2030 range(0, 100) \
2031 2031 \
2032 2032 manageable(intx, CMSTriggerInterval, -1, \
2033 2033 "Commence a CMS collection cycle (at least) every so many " \
2034 2034 "milliseconds (0 permanently, -1 disabled)") \
2035 2035 range(-1, max_intx) \
2036 2036 \
2037 2037 product(bool, UseCMSInitiatingOccupancyOnly, false, \
2038 2038 "Only use occupancy as a criterion for starting a CMS collection")\
2039 2039 \
2040 2040 product(uintx, CMSIsTooFullPercentage, 98, \
2041 2041 "An absolute ceiling above which CMS will always consider the " \
2042 2042 "unloading of classes when class unloading is enabled") \
2043 2043 range(0, 100) \
2044 2044 \
2045 2045 develop(bool, CMSTestInFreeList, false, \
2046 2046 "Check if the coalesced range is already in the " \
2047 2047 "free lists as claimed") \
2048 2048 \
2049 2049 notproduct(bool, CMSVerifyReturnedBytes, false, \
2050 2050 "Check that all the garbage collected was returned to the " \
2051 2051 "free lists") \
2052 2052 \
2053 2053 notproduct(bool, ScavengeALot, false, \
2054 2054 "Force scavenge at every Nth exit from the runtime system " \
2055 2055 "(N=ScavengeALotInterval)") \
2056 2056 \
2057 2057 develop(bool, FullGCALot, false, \
2058 2058 "Force full gc at every Nth exit from the runtime system " \
2059 2059 "(N=FullGCALotInterval)") \
2060 2060 \
2061 2061 notproduct(bool, GCALotAtAllSafepoints, false, \
2062 2062 "Enforce ScavengeALot/GCALot at all potential safepoints") \
2063 2063 \
2064 2064 notproduct(bool, PromotionFailureALot, false, \
2065 2065 "Use promotion failure handling on every youngest generation " \
2066 2066 "collection") \
2067 2067 \
2068 2068 develop(uintx, PromotionFailureALotCount, 1000, \
2069 2069 "Number of promotion failures occurring at PLAB " \
2070 2070 "refill attempts (ParNew) or promotion attempts " \
2071 2071 "(other young collectors)") \
2072 2072 \
2073 2073 develop(uintx, PromotionFailureALotInterval, 5, \
2074 2074 "Total collections between promotion failures a lot") \
2075 2075 \
2076 2076 experimental(uintx, WorkStealingSleepMillis, 1, \
2077 2077 "Sleep time when sleep is used for yields") \
2078 2078 \
2079 2079 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \
2080 2080 "Number of yields before a sleep is done during work stealing") \
2081 2081 \
2082 2082 experimental(uintx, WorkStealingHardSpins, 4096, \
2083 2083 "Number of iterations in a spin loop between checks on " \
2084 2084 "time out of hard spin") \
2085 2085 \
2086 2086 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \
2087 2087 "Ratio of hard spins to calls to yield") \
2088 2088 \
2089 2089 develop(uintx, ObjArrayMarkingStride, 512, \
2090 2090 "Number of object array elements to push onto the marking stack " \
2091 2091 "before pushing a continuation entry") \
2092 2092 \
2093 2093 develop(bool, MetadataAllocationFailALot, false, \
2094 2094 "Fail metadata allocations at intervals controlled by " \
2095 2095 "MetadataAllocationFailALotInterval") \
2096 2096 \
2097 2097 develop(uintx, MetadataAllocationFailALotInterval, 1000, \
2098 2098 "Metadata allocation failure a lot interval") \
2099 2099 \
2100 2100 develop(bool, TraceMetadataChunkAllocation, false, \
2101 2101 "Trace chunk metadata allocations") \
2102 2102 \
2103 2103 notproduct(bool, ExecuteInternalVMTests, false, \
2104 2104 "Enable execution of internal VM tests") \
2105 2105 \
2106 2106 notproduct(bool, VerboseInternalVMTests, false, \
2107 2107 "Turn on logging for internal VM tests.") \
2108 2108 \
2109 2109 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
2110 2110 \
2111 2111 product_pd(bool, ResizeTLAB, \
2112 2112 "Dynamically resize TLAB size for threads") \
2113 2113 \
2114 2114 product(bool, ZeroTLAB, false, \
2115 2115 "Zero out the newly created TLAB") \
2116 2116 \
2117 2117 product(bool, FastTLABRefill, true, \
2118 2118 "Use fast TLAB refill code") \
2119 2119 \
2120 2120 product(bool, TLABStats, true, \
2121 2121 "Provide more detailed and expensive TLAB statistics.") \
2122 2122 \
2123 2123 product_pd(bool, NeverActAsServerClassMachine, \
2124 2124 "Never act like a server-class machine") \
2125 2125 \
2126 2126 product(bool, AlwaysActAsServerClassMachine, false, \
2127 2127 "Always act like a server-class machine") \
2128 2128 \
2129 2129 product_pd(uint64_t, MaxRAM, \
2130 2130 "Real memory size (in bytes) used to set maximum heap size") \
2131 2131 range(0, 0XFFFFFFFFFFFFFFFF) \
2132 2132 \
2133 2133 product(size_t, ErgoHeapSizeLimit, 0, \
2134 2134 "Maximum ergonomically set heap size (in bytes); zero means use " \
2135 2135 "MaxRAM / MaxRAMFraction") \
2136 2136 range(0, max_uintx) \
2137 2137 \
2138 2138 product(uintx, MaxRAMFraction, 4, \
2139 2139 "Maximum fraction (1/n) of real memory used for maximum heap " \
2140 2140 "size") \
2141 2141 range(1, max_uintx) \
2142 2142 \
2143 2143 product(uintx, MinRAMFraction, 2, \
2144 2144 "Minimum fraction (1/n) of real memory used for maximum heap " \
2145 2145 "size on systems with small physical memory size") \
2146 2146 range(1, max_uintx) \
2147 2147 \
2148 2148 product(uintx, InitialRAMFraction, 64, \
2149 2149 "Fraction (1/n) of real memory used for initial heap size") \
2150 2150 range(1, max_uintx) \
2151 2151 \
2152 2152 develop(uintx, MaxVirtMemFraction, 2, \
2153 2153 "Maximum fraction (1/n) of virtual memory used for ergonomically "\
2154 2154 "determining maximum heap size") \
2155 2155 \
2156 2156 product(bool, UseAutoGCSelectPolicy, false, \
2157 2157 "Use automatic collection selection policy") \
2158 2158 \
2159 2159 product(uintx, AutoGCSelectPauseMillis, 5000, \
2160 2160 "Automatic GC selection pause threshold in milliseconds") \
2161 2161 range(0, max_uintx) \
2162 2162 \
2163 2163 product(bool, UseAdaptiveSizePolicy, true, \
2164 2164 "Use adaptive generation sizing policies") \
2165 2165 \
2166 2166 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
2167 2167 "Use adaptive survivor sizing policies") \
2168 2168 \
2169 2169 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
2170 2170 "Use adaptive young-old sizing policies at minor collections") \
2171 2171 \
2172 2172 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
2173 2173 "Use adaptive young-old sizing policies at major collections") \
2174 2174 \
2175 2175 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
2176 2176 "Include statistics from System.gc() for adaptive size policy") \
2177 2177 \
2178 2178 product(bool, UseAdaptiveGCBoundary, false, \
2179 2179 "Allow young-old boundary to move") \
2180 2180 \
2181 2181 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
2182 2182 "Resize the virtual spaces of the young or old generations") \
2183 2183 range(-1, 1) \
2184 2184 \
2185 2185 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
2186 2186 "Policy for changing generation size for throughput goals") \
2187 2187 range(0, 1) \
2188 2188 \
2189 2189 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
2190 2190 "Number of steps where heuristics is used before data is used") \
2191 2191 range(0, max_uintx) \
2192 2192 \
2193 2193 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
2194 2194 "Number of collections before the adaptive sizing is started") \
2195 2195 \
2196 2196 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
2197 2197 "Collection interval for printing information; zero means never") \
2198 2198 range(0, max_uintx) \
2199 2199 \
2200 2200 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
2201 2201 "Use adaptive minimum footprint as a goal") \
2202 2202 \
2203 2203 product(uintx, AdaptiveSizePolicyWeight, 10, \
2204 2204 "Weight given to exponential resizing, between 0 and 100") \
2205 2205 range(0, 100) \
2206 2206 \
2207 2207 product(uintx, AdaptiveTimeWeight, 25, \
2208 2208 "Weight given to time in adaptive policy, between 0 and 100") \
2209 2209 range(0, 100) \
2210 2210 \
2211 2211 product(uintx, PausePadding, 1, \
2212 2212 "How much buffer to keep for pause time") \
2213 2213 range(0, max_juint) \
2214 2214 \
2215 2215 product(uintx, PromotedPadding, 3, \
2216 2216 "How much buffer to keep for promotion failure") \
2217 2217 range(0, max_juint) \
2218 2218 \
2219 2219 product(uintx, SurvivorPadding, 3, \
2220 2220 "How much buffer to keep for survivor overflow") \
2221 2221 range(0, max_juint) \
2222 2222 \
2223 2223 product(uintx, ThresholdTolerance, 10, \
2224 2224 "Allowed collection cost difference between generations") \
2225 2225 range(0, 100) \
2226 2226 \
2227 2227 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
2228 2228 "If collection costs are within margin, reduce both by full " \
2229 2229 "delta") \
2230 2230 range(0, 100) \
2231 2231 \
2232 2232 product(uintx, YoungGenerationSizeIncrement, 20, \
2233 2233 "Adaptive size percentage change in young generation") \
2234 2234 range(0, 100) \
2235 2235 \
2236 2236 product(uintx, YoungGenerationSizeSupplement, 80, \
2237 2237 "Supplement to YoungedGenerationSizeIncrement used at startup") \
2238 2238 range(0, 100) \
2239 2239 \
2240 2240 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
2241 2241 "Decay factor to YoungedGenerationSizeSupplement") \
2242 2242 range(1, max_uintx) \
2243 2243 \
2244 2244 product(uintx, TenuredGenerationSizeIncrement, 20, \
2245 2245 "Adaptive size percentage change in tenured generation") \
2246 2246 range(0, 100) \
2247 2247 \
2248 2248 product(uintx, TenuredGenerationSizeSupplement, 80, \
2249 2249 "Supplement to TenuredGenerationSizeIncrement used at startup") \
2250 2250 range(0, 100) \
2251 2251 \
2252 2252 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
2253 2253 "Decay factor to TenuredGenerationSizeIncrement") \
2254 2254 range(1, max_uintx) \
2255 2255 \
2256 2256 product(uintx, MaxGCPauseMillis, max_uintx, \
2257 2257 "Adaptive size policy maximum GC pause time goal in millisecond, "\
2258 2258 "or (G1 Only) the maximum GC time per MMU time slice") \
2259 2259 range(1, max_uintx) \
2260 2260 constraint(MaxGCPauseMillisConstraintFunc,AfterMemoryInit) \
2261 2261 \
2262 2262 product(uintx, GCPauseIntervalMillis, 0, \
2263 2263 "Time slice for MMU specification") \
2264 2264 constraint(GCPauseIntervalMillisConstraintFunc,AfterMemoryInit) \
2265 2265 \
2266 2266 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
2267 2267 "Adaptive size policy maximum GC minor pause time goal " \
2268 2268 "in millisecond") \
2269 2269 range(0, max_uintx) \
2270 2270 \
2271 2271 product(uintx, GCTimeRatio, 99, \
2272 2272 "Adaptive size policy application time to GC time ratio") \
2273 2273 range(0, max_juint) \
2274 2274 \
2275 2275 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
2276 2276 "Adaptive size scale down factor for shrinking") \
2277 2277 range(1, max_uintx) \
2278 2278 \
2279 2279 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
2280 2280 "Adaptive size decays the major cost for long major intervals") \
2281 2281 \
2282 2282 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
2283 2283 "Time scale over which major costs decay") \
2284 2284 range(0, max_uintx) \
2285 2285 \
2286 2286 product(uintx, MinSurvivorRatio, 3, \
2287 2287 "Minimum ratio of young generation/survivor space size") \
2288 2288 range(3, max_uintx) \
2289 2289 \
2290 2290 product(uintx, InitialSurvivorRatio, 8, \
2291 2291 "Initial ratio of young generation/survivor space size") \
2292 2292 range(0, max_uintx) \
2293 2293 \
2294 2294 product(size_t, BaseFootPrintEstimate, 256*M, \
2295 2295 "Estimate of footprint other than Java Heap") \
2296 2296 range(0, max_uintx) \
2297 2297 \
2298 2298 product(bool, UseGCOverheadLimit, true, \
2299 2299 "Use policy to limit of proportion of time spent in GC " \
2300 2300 "before an OutOfMemory error is thrown") \
2301 2301 \
2302 2302 product(uintx, GCTimeLimit, 98, \
2303 2303 "Limit of the proportion of time spent in GC before " \
2304 2304 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \
2305 2305 range(0, 100) \
2306 2306 \
2307 2307 product(uintx, GCHeapFreeLimit, 2, \
2308 2308 "Minimum percentage of free space after a full GC before an " \
2309 2309 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
2310 2310 range(0, 100) \
2311 2311 \
2312 2312 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
2313 2313 "Number of consecutive collections before gc time limit fires") \
2314 2314 range(1, max_uintx) \
2315 2315 \
2316 2316 product(intx, PrefetchCopyIntervalInBytes, -1, \
2317 2317 "How far ahead to prefetch destination area (<= 0 means off)") \
2318 2318 range(-1, max_jint) \
2319 2319 \
2320 2320 product(intx, PrefetchScanIntervalInBytes, -1, \
2321 2321 "How far ahead to prefetch scan area (<= 0 means off)") \
2322 2322 range(-1, max_jint) \
2323 2323 \
2324 2324 product(intx, PrefetchFieldsAhead, -1, \
2325 2325 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2326 2326 range(-1, max_jint) \
2327 2327 \
2328 2328 diagnostic(bool, VerifyDuringStartup, false, \
2329 2329 "Verify memory system before executing any Java code " \
2330 2330 "during VM initialization") \
2331 2331 \
2332 2332 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2333 2333 "Verify system before exiting") \
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2334 2334 \
2335 2335 diagnostic(bool, VerifyBeforeGC, false, \
2336 2336 "Verify memory system before GC") \
2337 2337 \
2338 2338 diagnostic(bool, VerifyAfterGC, false, \
2339 2339 "Verify memory system after GC") \
2340 2340 \
2341 2341 diagnostic(bool, VerifyDuringGC, false, \
2342 2342 "Verify memory system during GC (between phases)") \
2343 2343 \
2344 + diagnostic(ccstrlist, VerifySubSet, "", \
2345 + "Memory sub-systems to verify when Verify*GC flag(s) \
2346 + are enabled. One or more sub-systems can be specified \
2347 + in a comma separated string. Sub-systems are: \
2348 + threads, heap, symbol_table, string_table, codecache, \
2349 + dictionary, classloader_data_graph, metaspace, jni_handles, \
2350 + c-heap, codecache_oops") \
2351 + \
2344 2352 diagnostic(bool, GCParallelVerificationEnabled, true, \
2345 2353 "Enable parallel memory system verification") \
2346 2354 \
2347 2355 diagnostic(bool, DeferInitialCardMark, false, \
2348 2356 "When +ReduceInitialCardMarks, explicitly defer any that " \
2349 2357 "may arise from new_pre_store_barrier") \
2350 2358 \
2351 2359 product(bool, UseCondCardMark, false, \
2352 2360 "Check for already marked card before updating card table") \
2353 2361 \
2354 2362 diagnostic(bool, VerifyRememberedSets, false, \
2355 2363 "Verify GC remembered sets") \
2356 2364 \
2357 2365 diagnostic(bool, VerifyObjectStartArray, true, \
2358 2366 "Verify GC object start array if verify before/after") \
2359 2367 \
2360 2368 product(bool, DisableExplicitGC, false, \
2361 2369 "Ignore calls to System.gc()") \
2362 2370 \
2363 2371 notproduct(bool, CheckMemoryInitialization, false, \
2364 2372 "Check memory initialization") \
2365 2373 \
2366 2374 diagnostic(bool, BindCMSThreadToCPU, false, \
2367 2375 "Bind CMS Thread to CPU if possible") \
2368 2376 \
2369 2377 diagnostic(uintx, CPUForCMSThread, 0, \
2370 2378 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2371 2379 range(0, max_juint) \
2372 2380 \
2373 2381 product(bool, BindGCTaskThreadsToCPUs, false, \
2374 2382 "Bind GCTaskThreads to CPUs if possible") \
2375 2383 \
2376 2384 product(bool, UseGCTaskAffinity, false, \
2377 2385 "Use worker affinity when asking for GCTasks") \
2378 2386 \
2379 2387 product(uintx, ProcessDistributionStride, 4, \
2380 2388 "Stride through processors when distributing processes") \
2381 2389 range(0, max_juint) \
2382 2390 \
2383 2391 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2384 2392 "Number of times the coordinator GC thread will sleep while " \
2385 2393 "yielding before giving up and resuming GC") \
2386 2394 range(0, max_juint) \
2387 2395 \
2388 2396 product(uintx, CMSYieldSleepCount, 0, \
2389 2397 "Number of times a GC thread (minus the coordinator) " \
2390 2398 "will sleep while yielding before giving up and resuming GC") \
2391 2399 range(0, max_juint) \
2392 2400 \
2393 2401 develop(intx, ConcGCYieldTimeout, 0, \
2394 2402 "If non-zero, assert that GC threads yield within this " \
2395 2403 "number of milliseconds") \
2396 2404 range(0, max_intx) \
2397 2405 \
2398 2406 develop(bool, TraceFinalizerRegistration, false, \
2399 2407 "Trace registration of final references") \
2400 2408 \
2401 2409 notproduct(bool, TraceScavenge, false, \
2402 2410 "Trace scavenge") \
2403 2411 \
2404 2412 product(bool, IgnoreEmptyClassPaths, false, \
2405 2413 "Ignore empty path elements in -classpath") \
2406 2414 \
2407 2415 product(bool, TraceClassPaths, false, \
2408 2416 "Trace processing of class paths") \
2409 2417 \
2410 2418 product_rw(bool, TraceClassLoading, false, \
2411 2419 "Trace all classes loaded") \
2412 2420 \
2413 2421 product(bool, TraceClassLoadingPreorder, false, \
2414 2422 "Trace all classes loaded in order referenced (not loaded)") \
2415 2423 \
2416 2424 product_rw(bool, TraceClassUnloading, false, \
2417 2425 "Trace unloading of classes") \
2418 2426 \
2419 2427 product_rw(bool, TraceLoaderConstraints, false, \
2420 2428 "Trace loader constraints") \
2421 2429 \
2422 2430 develop(bool, TraceClassLoaderData, false, \
2423 2431 "Trace class loader loader_data lifetime") \
2424 2432 \
2425 2433 product(size_t, InitialBootClassLoaderMetaspaceSize, \
2426 2434 NOT_LP64(2200*K) LP64_ONLY(4*M), \
2427 2435 "Initial size of the boot class loader data metaspace") \
2428 2436 range(30*K, max_uintx/BytesPerWord) \
2429 2437 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\
2430 2438 \
2431 2439 product(bool, TraceYoungGenTime, false, \
2432 2440 "Trace accumulated time for young collection") \
2433 2441 \
2434 2442 product(bool, TraceOldGenTime, false, \
2435 2443 "Trace accumulated time for old collection") \
2436 2444 \
2437 2445 product(bool, PrintHeapAtSIGBREAK, true, \
2438 2446 "Print heap layout in response to SIGBREAK") \
2439 2447 \
2440 2448 manageable(bool, PrintClassHistogram, false, \
2441 2449 "Print a histogram of class instances") \
2442 2450 \
2443 2451 develop(bool, TraceWorkGang, false, \
2444 2452 "Trace activities of work gangs") \
2445 2453 \
2446 2454 develop(bool, TraceGCTaskManager, false, \
2447 2455 "Trace actions of the GC task manager") \
2448 2456 \
2449 2457 develop(bool, TraceGCTaskQueue, false, \
2450 2458 "Trace actions of the GC task queues") \
2451 2459 \
2452 2460 diagnostic(bool, TraceGCTaskThread, false, \
2453 2461 "Trace actions of the GC task threads") \
2454 2462 \
2455 2463 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2456 2464 "Trace marking phase in ParallelOldGC") \
2457 2465 \
2458 2466 develop(bool, TraceParallelOldGCDensePrefix, false, \
2459 2467 "Trace dense prefix computation for ParallelOldGC") \
2460 2468 \
2461 2469 develop(bool, IgnoreLibthreadGPFault, false, \
2462 2470 "Suppress workaround for libthread GP fault") \
2463 2471 \
2464 2472 experimental(double, ObjectCountCutOffPercent, 0.5, \
2465 2473 "The percentage of the used heap that the instances of a class " \
2466 2474 "must occupy for the class to generate a trace event") \
2467 2475 range(0.0, 100.0) \
2468 2476 \
2469 2477 /* JVMTI heap profiling */ \
2470 2478 \
2471 2479 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2472 2480 "Trace JVMTI object tagging calls") \
2473 2481 \
2474 2482 diagnostic(bool, VerifyBeforeIteration, false, \
2475 2483 "Verify memory system before JVMTI iteration") \
2476 2484 \
2477 2485 /* compiler interface */ \
2478 2486 \
2479 2487 develop(bool, CIPrintCompilerName, false, \
2480 2488 "when CIPrint is active, print the name of the active compiler") \
2481 2489 \
2482 2490 diagnostic(bool, CIPrintCompileQueue, false, \
2483 2491 "display the contents of the compile queue whenever a " \
2484 2492 "compilation is enqueued") \
2485 2493 \
2486 2494 develop(bool, CIPrintRequests, false, \
2487 2495 "display every request for compilation") \
2488 2496 \
2489 2497 product(bool, CITime, false, \
2490 2498 "collect timing information for compilation") \
2491 2499 \
2492 2500 develop(bool, CITimeVerbose, false, \
2493 2501 "be more verbose in compilation timings") \
2494 2502 \
2495 2503 develop(bool, CITimeEach, false, \
2496 2504 "display timing information after each successful compilation") \
2497 2505 \
2498 2506 develop(bool, CICountOSR, false, \
2499 2507 "use a separate counter when assigning ids to osr compilations") \
2500 2508 \
2501 2509 develop(bool, CICompileNatives, true, \
2502 2510 "compile native methods if supported by the compiler") \
2503 2511 \
2504 2512 develop_pd(bool, CICompileOSR, \
2505 2513 "compile on stack replacement methods if supported by the " \
2506 2514 "compiler") \
2507 2515 \
2508 2516 develop(bool, CIPrintMethodCodes, false, \
2509 2517 "print method bytecodes of the compiled code") \
2510 2518 \
2511 2519 develop(bool, CIPrintTypeFlow, false, \
2512 2520 "print the results of ciTypeFlow analysis") \
2513 2521 \
2514 2522 develop(bool, CITraceTypeFlow, false, \
2515 2523 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2516 2524 \
2517 2525 develop(intx, OSROnlyBCI, -1, \
2518 2526 "OSR only at this bci. Negative values mean exclude that bci") \
2519 2527 \
2520 2528 /* compiler */ \
2521 2529 \
2522 2530 /* notice: the max range value here is max_jint, not max_intx */ \
2523 2531 /* because of overflow issue */ \
2524 2532 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2525 2533 "Number of compiler threads to run") \
2526 2534 range(0, max_jint) \
2527 2535 constraint(CICompilerCountConstraintFunc, AtParse) \
2528 2536 \
2529 2537 product(intx, CompilationPolicyChoice, 0, \
2530 2538 "which compilation policy (0-3)") \
2531 2539 range(0, 3) \
2532 2540 \
2533 2541 develop(bool, UseStackBanging, true, \
2534 2542 "use stack banging for stack overflow checks (required for " \
2535 2543 "proper StackOverflow handling; disable only to measure cost " \
2536 2544 "of stackbanging)") \
2537 2545 \
2538 2546 develop(bool, UseStrictFP, true, \
2539 2547 "use strict fp if modifier strictfp is set") \
2540 2548 \
2541 2549 develop(bool, GenerateSynchronizationCode, true, \
2542 2550 "generate locking/unlocking code for synchronized methods and " \
2543 2551 "monitors") \
2544 2552 \
2545 2553 develop(bool, GenerateCompilerNullChecks, true, \
2546 2554 "Generate explicit null checks for loads/stores/calls") \
2547 2555 \
2548 2556 develop(bool, GenerateRangeChecks, true, \
2549 2557 "Generate range checks for array accesses") \
2550 2558 \
2551 2559 develop_pd(bool, ImplicitNullChecks, \
2552 2560 "Generate code for implicit null checks") \
2553 2561 \
2554 2562 product_pd(bool, TrapBasedNullChecks, \
2555 2563 "Generate code for null checks that uses a cmp and trap " \
2556 2564 "instruction raising SIGTRAP. This is only used if an access to" \
2557 2565 "null (+offset) will not raise a SIGSEGV, i.e.," \
2558 2566 "ImplicitNullChecks don't work (PPC64).") \
2559 2567 \
2560 2568 product(bool, PrintSafepointStatistics, false, \
2561 2569 "Print statistics about safepoint synchronization") \
2562 2570 \
2563 2571 product(intx, PrintSafepointStatisticsCount, 300, \
2564 2572 "Total number of safepoint statistics collected " \
2565 2573 "before printing them out") \
2566 2574 range(1, max_intx) \
2567 2575 \
2568 2576 product(intx, PrintSafepointStatisticsTimeout, -1, \
2569 2577 "Print safepoint statistics only when safepoint takes " \
2570 2578 "more than PrintSafepointSatisticsTimeout in millis") \
2571 2579 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \
2572 2580 NOT_LP64(range(-1, max_intx)) \
2573 2581 \
2574 2582 product(bool, TraceSafepointCleanupTime, false, \
2575 2583 "Print the break down of clean up tasks performed during " \
2576 2584 "safepoint") \
2577 2585 \
2578 2586 product(bool, Inline, true, \
2579 2587 "Enable inlining") \
2580 2588 \
2581 2589 product(bool, ClipInlining, true, \
2582 2590 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \
2583 2591 \
2584 2592 develop(bool, UseCHA, true, \
2585 2593 "Enable CHA") \
2586 2594 \
2587 2595 product(bool, UseTypeProfile, true, \
2588 2596 "Check interpreter profile for historically monomorphic calls") \
2589 2597 \
2590 2598 diagnostic(bool, PrintInlining, false, \
2591 2599 "Print inlining optimizations") \
2592 2600 \
2593 2601 product(bool, UsePopCountInstruction, false, \
2594 2602 "Use population count instruction") \
2595 2603 \
2596 2604 develop(bool, EagerInitialization, false, \
2597 2605 "Eagerly initialize classes if possible") \
2598 2606 \
2599 2607 diagnostic(bool, LogTouchedMethods, false, \
2600 2608 "Log methods which have been ever touched in runtime") \
2601 2609 \
2602 2610 diagnostic(bool, PrintTouchedMethodsAtExit, false, \
2603 2611 "Print all methods that have been ever touched in runtime") \
2604 2612 \
2605 2613 develop(bool, TraceMethodReplacement, false, \
2606 2614 "Print when methods are replaced do to recompilation") \
2607 2615 \
2608 2616 develop(bool, PrintMethodFlushing, false, \
2609 2617 "Print the nmethods being flushed") \
2610 2618 \
2611 2619 diagnostic(bool, PrintMethodFlushingStatistics, false, \
2612 2620 "print statistics about method flushing") \
2613 2621 \
2614 2622 diagnostic(intx, HotMethodDetectionLimit, 100000, \
2615 2623 "Number of compiled code invocations after which " \
2616 2624 "the method is considered as hot by the flusher") \
2617 2625 range(1, max_jint) \
2618 2626 \
2619 2627 diagnostic(intx, MinPassesBeforeFlush, 10, \
2620 2628 "Minimum number of sweeper passes before an nmethod " \
2621 2629 "can be flushed") \
2622 2630 range(0, max_intx) \
2623 2631 \
2624 2632 product(bool, UseCodeAging, true, \
2625 2633 "Insert counter to detect warm methods") \
2626 2634 \
2627 2635 diagnostic(bool, StressCodeAging, false, \
2628 2636 "Start with counters compiled in") \
2629 2637 \
2630 2638 develop(bool, UseRelocIndex, false, \
2631 2639 "Use an index to speed random access to relocations") \
2632 2640 \
2633 2641 develop(bool, StressCodeBuffers, false, \
2634 2642 "Exercise code buffer expansion and other rare state changes") \
2635 2643 \
2636 2644 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2637 2645 "Generate extra debugging information for non-safepoints in " \
2638 2646 "nmethods") \
2639 2647 \
2640 2648 product(bool, PrintVMOptions, false, \
2641 2649 "Print flags that appeared on the command line") \
2642 2650 \
2643 2651 product(bool, IgnoreUnrecognizedVMOptions, false, \
2644 2652 "Ignore unrecognized VM options") \
2645 2653 \
2646 2654 product(bool, PrintCommandLineFlags, false, \
2647 2655 "Print flags specified on command line or set by ergonomics") \
2648 2656 \
2649 2657 product(bool, PrintFlagsInitial, false, \
2650 2658 "Print all VM flags before argument processing and exit VM") \
2651 2659 \
2652 2660 product(bool, PrintFlagsFinal, false, \
2653 2661 "Print all VM flags after argument and ergonomic processing") \
2654 2662 \
2655 2663 notproduct(bool, PrintFlagsWithComments, false, \
2656 2664 "Print all VM flags with default values and descriptions and " \
2657 2665 "exit") \
2658 2666 \
2659 2667 product(bool, PrintFlagsRanges, false, \
2660 2668 "Print VM flags and their ranges and exit VM") \
2661 2669 \
2662 2670 diagnostic(bool, SerializeVMOutput, true, \
2663 2671 "Use a mutex to serialize output to tty and LogFile") \
2664 2672 \
2665 2673 diagnostic(bool, DisplayVMOutput, true, \
2666 2674 "Display all VM output on the tty, independently of LogVMOutput") \
2667 2675 \
2668 2676 diagnostic(bool, LogVMOutput, false, \
2669 2677 "Save VM output to LogFile") \
2670 2678 \
2671 2679 diagnostic(ccstr, LogFile, NULL, \
2672 2680 "If LogVMOutput or LogCompilation is on, save VM output to " \
2673 2681 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
2674 2682 \
2675 2683 product(ccstr, ErrorFile, NULL, \
2676 2684 "If an error occurs, save the error data to this file " \
2677 2685 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2678 2686 \
2679 2687 product(bool, DisplayVMOutputToStderr, false, \
2680 2688 "If DisplayVMOutput is true, display all VM output to stderr") \
2681 2689 \
2682 2690 product(bool, DisplayVMOutputToStdout, false, \
2683 2691 "If DisplayVMOutput is true, display all VM output to stdout") \
2684 2692 \
2685 2693 product(bool, UseHeavyMonitors, false, \
2686 2694 "use heavyweight instead of lightweight Java monitors") \
2687 2695 \
2688 2696 product(bool, PrintStringTableStatistics, false, \
2689 2697 "print statistics about the StringTable and SymbolTable") \
2690 2698 \
2691 2699 diagnostic(bool, VerifyStringTableAtExit, false, \
2692 2700 "verify StringTable contents at exit") \
2693 2701 \
2694 2702 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2695 2703 "print histogram of the symbol table") \
2696 2704 \
2697 2705 notproduct(bool, ExitVMOnVerifyError, false, \
2698 2706 "standard exit from VM if bytecode verify error " \
2699 2707 "(only in debug mode)") \
2700 2708 \
2701 2709 diagnostic(ccstr, AbortVMOnException, NULL, \
2702 2710 "Call fatal if this exception is thrown. Example: " \
2703 2711 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2704 2712 \
2705 2713 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \
2706 2714 "Call fatal if the exception pointed by AbortVMOnException " \
2707 2715 "has this message") \
2708 2716 \
2709 2717 develop(bool, DebugVtables, false, \
2710 2718 "add debugging code to vtable dispatch") \
2711 2719 \
2712 2720 develop(bool, PrintVtables, false, \
2713 2721 "print vtables when printing klass") \
2714 2722 \
2715 2723 notproduct(bool, PrintVtableStats, false, \
2716 2724 "print vtables stats at end of run") \
2717 2725 \
2718 2726 develop(bool, TraceCreateZombies, false, \
2719 2727 "trace creation of zombie nmethods") \
2720 2728 \
2721 2729 notproduct(bool, IgnoreLockingAssertions, false, \
2722 2730 "disable locking assertions (for speed)") \
2723 2731 \
2724 2732 product(bool, RangeCheckElimination, true, \
2725 2733 "Eliminate range checks") \
2726 2734 \
2727 2735 develop_pd(bool, UncommonNullCast, \
2728 2736 "track occurrences of null in casts; adjust compiler tactics") \
2729 2737 \
2730 2738 develop(bool, TypeProfileCasts, true, \
2731 2739 "treat casts like calls for purposes of type profiling") \
2732 2740 \
2733 2741 develop(bool, DelayCompilationDuringStartup, true, \
2734 2742 "Delay invoking the compiler until main application class is " \
2735 2743 "loaded") \
2736 2744 \
2737 2745 develop(bool, CompileTheWorld, false, \
2738 2746 "Compile all methods in all classes in bootstrap class path " \
2739 2747 "(stress test)") \
2740 2748 \
2741 2749 develop(bool, CompileTheWorldPreloadClasses, true, \
2742 2750 "Preload all classes used by a class before start loading") \
2743 2751 \
2744 2752 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2745 2753 "Force a safepoint every n compiles so sweeper can keep up") \
2746 2754 \
2747 2755 develop(bool, FillDelaySlots, true, \
2748 2756 "Fill delay slots (on SPARC only)") \
2749 2757 \
2750 2758 develop(bool, TimeLivenessAnalysis, false, \
2751 2759 "Time computation of bytecode liveness analysis") \
2752 2760 \
2753 2761 develop(bool, TraceLivenessGen, false, \
2754 2762 "Trace the generation of liveness analysis information") \
2755 2763 \
2756 2764 notproduct(bool, TraceLivenessQuery, false, \
2757 2765 "Trace queries of liveness analysis information") \
2758 2766 \
2759 2767 notproduct(bool, CollectIndexSetStatistics, false, \
2760 2768 "Collect information about IndexSets") \
2761 2769 \
2762 2770 develop(bool, UseLoopSafepoints, true, \
2763 2771 "Generate Safepoint nodes in every loop") \
2764 2772 \
2765 2773 develop(intx, FastAllocateSizeLimit, 128*K, \
2766 2774 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2767 2775 "Inline allocations larger than this in doublewords must go slow")\
2768 2776 \
2769 2777 product(bool, AggressiveOpts, false, \
2770 2778 "Enable aggressive optimizations - see arguments.cpp") \
2771 2779 \
2772 2780 product_pd(bool, CompactStrings, \
2773 2781 "Enable Strings to use single byte chars in backing store") \
2774 2782 \
2775 2783 product_pd(uintx, TypeProfileLevel, \
2776 2784 "=XYZ, with Z: Type profiling of arguments at call; " \
2777 2785 "Y: Type profiling of return value at call; " \
2778 2786 "X: Type profiling of parameters to methods; " \
2779 2787 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \
2780 2788 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \
2781 2789 \
2782 2790 product(intx, TypeProfileArgsLimit, 2, \
2783 2791 "max number of call arguments to consider for type profiling") \
2784 2792 range(0, 16) \
2785 2793 \
2786 2794 product(intx, TypeProfileParmsLimit, 2, \
2787 2795 "max number of incoming parameters to consider for type profiling"\
2788 2796 ", -1 for all") \
2789 2797 range(-1, 64) \
2790 2798 \
2791 2799 /* statistics */ \
2792 2800 develop(bool, CountCompiledCalls, false, \
2793 2801 "Count method invocations") \
2794 2802 \
2795 2803 notproduct(bool, CountRuntimeCalls, false, \
2796 2804 "Count VM runtime calls") \
2797 2805 \
2798 2806 develop(bool, CountJNICalls, false, \
2799 2807 "Count jni method invocations") \
2800 2808 \
2801 2809 notproduct(bool, CountJVMCalls, false, \
2802 2810 "Count jvm method invocations") \
2803 2811 \
2804 2812 notproduct(bool, CountRemovableExceptions, false, \
2805 2813 "Count exceptions that could be replaced by branches due to " \
2806 2814 "inlining") \
2807 2815 \
2808 2816 notproduct(bool, ICMissHistogram, false, \
2809 2817 "Produce histogram of IC misses") \
2810 2818 \
2811 2819 /* interpreter */ \
2812 2820 develop(bool, ClearInterpreterLocals, false, \
2813 2821 "Always clear local variables of interpreter activations upon " \
2814 2822 "entry") \
2815 2823 \
2816 2824 product_pd(bool, RewriteBytecodes, \
2817 2825 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2818 2826 \
2819 2827 product_pd(bool, RewriteFrequentPairs, \
2820 2828 "Rewrite frequently used bytecode pairs into a single bytecode") \
2821 2829 \
2822 2830 diagnostic(bool, PrintInterpreter, false, \
2823 2831 "Print the generated interpreter code") \
2824 2832 \
2825 2833 product(bool, UseInterpreter, true, \
2826 2834 "Use interpreter for non-compiled methods") \
2827 2835 \
2828 2836 develop(bool, UseFastSignatureHandlers, true, \
2829 2837 "Use fast signature handlers for native calls") \
2830 2838 \
2831 2839 product(bool, UseLoopCounter, true, \
2832 2840 "Increment invocation counter on backward branch") \
2833 2841 \
2834 2842 product_pd(bool, UseOnStackReplacement, \
2835 2843 "Use on stack replacement, calls runtime if invoc. counter " \
2836 2844 "overflows in loop") \
2837 2845 \
2838 2846 notproduct(bool, TraceOnStackReplacement, false, \
2839 2847 "Trace on stack replacement") \
2840 2848 \
2841 2849 product_pd(bool, PreferInterpreterNativeStubs, \
2842 2850 "Use always interpreter stubs for native methods invoked via " \
2843 2851 "interpreter") \
2844 2852 \
2845 2853 develop(bool, CountBytecodes, false, \
2846 2854 "Count number of bytecodes executed") \
2847 2855 \
2848 2856 develop(bool, PrintBytecodeHistogram, false, \
2849 2857 "Print histogram of the executed bytecodes") \
2850 2858 \
2851 2859 develop(bool, PrintBytecodePairHistogram, false, \
2852 2860 "Print histogram of the executed bytecode pairs") \
2853 2861 \
2854 2862 diagnostic(bool, PrintSignatureHandlers, false, \
2855 2863 "Print code generated for native method signature handlers") \
2856 2864 \
2857 2865 develop(bool, VerifyOops, false, \
2858 2866 "Do plausibility checks for oops") \
2859 2867 \
2860 2868 develop(bool, CheckUnhandledOops, false, \
2861 2869 "Check for unhandled oops in VM code") \
2862 2870 \
2863 2871 develop(bool, VerifyJNIFields, trueInDebug, \
2864 2872 "Verify jfieldIDs for instance fields") \
2865 2873 \
2866 2874 notproduct(bool, VerifyJNIEnvThread, false, \
2867 2875 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2868 2876 "from JNI") \
2869 2877 \
2870 2878 develop(bool, VerifyFPU, false, \
2871 2879 "Verify FPU state (check for NaN's, etc.)") \
2872 2880 \
2873 2881 develop(bool, VerifyThread, false, \
2874 2882 "Watch the thread register for corruption (SPARC only)") \
2875 2883 \
2876 2884 develop(bool, VerifyActivationFrameSize, false, \
2877 2885 "Verify that activation frame didn't become smaller than its " \
2878 2886 "minimal size") \
2879 2887 \
2880 2888 develop(bool, TraceFrequencyInlining, false, \
2881 2889 "Trace frequency based inlining") \
2882 2890 \
2883 2891 develop_pd(bool, InlineIntrinsics, \
2884 2892 "Inline intrinsics that can be statically resolved") \
2885 2893 \
2886 2894 product_pd(bool, ProfileInterpreter, \
2887 2895 "Profile at the bytecode level during interpretation") \
2888 2896 \
2889 2897 develop(bool, TraceProfileInterpreter, false, \
2890 2898 "Trace profiling at the bytecode level during interpretation. " \
2891 2899 "This outputs the profiling information collected to improve " \
2892 2900 "jit compilation.") \
2893 2901 \
2894 2902 develop_pd(bool, ProfileTraps, \
2895 2903 "Profile deoptimization traps at the bytecode level") \
2896 2904 \
2897 2905 product(intx, ProfileMaturityPercentage, 20, \
2898 2906 "number of method invocations/branches (expressed as % of " \
2899 2907 "CompileThreshold) before using the method's profile") \
2900 2908 range(0, 100) \
2901 2909 \
2902 2910 diagnostic(bool, PrintMethodData, false, \
2903 2911 "Print the results of +ProfileInterpreter at end of run") \
2904 2912 \
2905 2913 develop(bool, VerifyDataPointer, trueInDebug, \
2906 2914 "Verify the method data pointer during interpreter profiling") \
2907 2915 \
2908 2916 develop(bool, VerifyCompiledCode, false, \
2909 2917 "Include miscellaneous runtime verifications in nmethod code; " \
2910 2918 "default off because it disturbs nmethod size heuristics") \
2911 2919 \
2912 2920 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2913 2921 "Manually make GC thread crash then dump java stack trace; " \
2914 2922 "Test only") \
2915 2923 \
2916 2924 /* compilation */ \
2917 2925 product(bool, UseCompiler, true, \
2918 2926 "Use Just-In-Time compilation") \
2919 2927 \
2920 2928 develop(bool, TraceCompilationPolicy, false, \
2921 2929 "Trace compilation policy") \
2922 2930 \
2923 2931 develop(bool, TimeCompilationPolicy, false, \
2924 2932 "Time the compilation policy") \
2925 2933 \
2926 2934 product(bool, UseCounterDecay, true, \
2927 2935 "Adjust recompilation counters") \
2928 2936 \
2929 2937 develop(intx, CounterHalfLifeTime, 30, \
2930 2938 "Half-life time of invocation counters (in seconds)") \
2931 2939 \
2932 2940 develop(intx, CounterDecayMinIntervalLength, 500, \
2933 2941 "The minimum interval (in milliseconds) between invocation of " \
2934 2942 "CounterDecay") \
2935 2943 \
2936 2944 product(bool, AlwaysCompileLoopMethods, false, \
2937 2945 "When using recompilation, never interpret methods " \
2938 2946 "containing loops") \
2939 2947 \
2940 2948 product(bool, DontCompileHugeMethods, true, \
2941 2949 "Do not compile methods > HugeMethodLimit") \
2942 2950 \
2943 2951 /* Bytecode escape analysis estimation. */ \
2944 2952 product(bool, EstimateArgEscape, true, \
2945 2953 "Analyze bytecodes to estimate escape state of arguments") \
2946 2954 \
2947 2955 product(intx, BCEATraceLevel, 0, \
2948 2956 "How much tracing to do of bytecode escape analysis estimates " \
2949 2957 "(0-3)") \
2950 2958 range(0, 3) \
2951 2959 \
2952 2960 product(intx, MaxBCEAEstimateLevel, 5, \
2953 2961 "Maximum number of nested calls that are analyzed by BC EA") \
2954 2962 range(0, max_jint) \
2955 2963 \
2956 2964 product(intx, MaxBCEAEstimateSize, 150, \
2957 2965 "Maximum bytecode size of a method to be analyzed by BC EA") \
2958 2966 range(0, max_jint) \
2959 2967 \
2960 2968 product(intx, AllocatePrefetchStyle, 1, \
2961 2969 "0 = no prefetch, " \
2962 2970 "1 = prefetch instructions for each allocation, " \
2963 2971 "2 = use TLAB watermark to gate allocation prefetch, " \
2964 2972 "3 = use BIS instruction on Sparc for allocation prefetch") \
2965 2973 range(0, 3) \
2966 2974 \
2967 2975 product(intx, AllocatePrefetchDistance, -1, \
2968 2976 "Distance to prefetch ahead of allocation pointer. " \
2969 2977 "-1: use system-specific value (automatically determined") \
2970 2978 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\
2971 2979 \
2972 2980 product(intx, AllocatePrefetchLines, 3, \
2973 2981 "Number of lines to prefetch ahead of array allocation pointer") \
2974 2982 range(1, max_jint / 2) \
2975 2983 \
2976 2984 product(intx, AllocateInstancePrefetchLines, 1, \
2977 2985 "Number of lines to prefetch ahead of instance allocation " \
2978 2986 "pointer") \
2979 2987 range(1, max_jint / 2) \
2980 2988 \
2981 2989 product(intx, AllocatePrefetchStepSize, 16, \
2982 2990 "Step size in bytes of sequential prefetch instructions") \
2983 2991 range(1, max_jint) \
2984 2992 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\
2985 2993 \
2986 2994 product(intx, AllocatePrefetchInstr, 0, \
2987 2995 "Prefetch instruction to prefetch ahead of allocation pointer") \
2988 2996 constraint(AllocatePrefetchInstrConstraintFunc, AfterErgo) \
2989 2997 \
2990 2998 /* deoptimization */ \
2991 2999 develop(bool, TraceDeoptimization, false, \
2992 3000 "Trace deoptimization") \
2993 3001 \
2994 3002 develop(bool, PrintDeoptimizationDetails, false, \
2995 3003 "Print more information about deoptimization") \
2996 3004 \
2997 3005 develop(bool, DebugDeoptimization, false, \
2998 3006 "Tracing various information while debugging deoptimization") \
2999 3007 \
3000 3008 product(intx, SelfDestructTimer, 0, \
3001 3009 "Will cause VM to terminate after a given time (in minutes) " \
3002 3010 "(0 means off)") \
3003 3011 range(0, max_intx) \
3004 3012 \
3005 3013 product(intx, MaxJavaStackTraceDepth, 1024, \
3006 3014 "The maximum number of lines in the stack trace for Java " \
3007 3015 "exceptions (0 means all)") \
3008 3016 range(0, max_jint/2) \
3009 3017 \
3010 3018 develop(bool, TraceStackWalk, false, \
3011 3019 "Trace stack walking") \
3012 3020 \
3013 3021 product(bool, MemberNameInStackFrame, true, \
3014 3022 "Use MemberName in StackFrame") \
3015 3023 \
3016 3024 /* notice: the max range value here is max_jint, not max_intx */ \
3017 3025 /* because of overflow issue */ \
3018 3026 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
3019 3027 "Guarantee a safepoint (at least) every so many milliseconds " \
3020 3028 "(0 means none)")) \
3021 3029 NOT_EMBEDDED(range(0, max_jint)) \
3022 3030 \
3023 3031 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \
3024 3032 "Guarantee a safepoint (at least) every so many milliseconds " \
3025 3033 "(0 means none)")) \
3026 3034 EMBEDDED_ONLY(range(0, max_jint)) \
3027 3035 \
3028 3036 product(intx, SafepointTimeoutDelay, 10000, \
3029 3037 "Delay in milliseconds for option SafepointTimeout") \
3030 3038 LP64_ONLY(range(0, max_intx/MICROUNITS)) \
3031 3039 NOT_LP64(range(0, max_intx)) \
3032 3040 \
3033 3041 product(intx, NmethodSweepActivity, 10, \
3034 3042 "Removes cold nmethods from code cache if > 0. Higher values " \
3035 3043 "result in more aggressive sweeping") \
3036 3044 range(0, 2000) \
3037 3045 \
3038 3046 notproduct(bool, LogSweeper, false, \
3039 3047 "Keep a ring buffer of sweeper activity") \
3040 3048 \
3041 3049 notproduct(intx, SweeperLogEntries, 1024, \
3042 3050 "Number of records in the ring buffer of sweeper activity") \
3043 3051 \
3044 3052 notproduct(intx, MemProfilingInterval, 500, \
3045 3053 "Time between each invocation of the MemProfiler") \
3046 3054 \
3047 3055 develop(intx, MallocCatchPtr, -1, \
3048 3056 "Hit breakpoint when mallocing/freeing this pointer") \
3049 3057 \
3050 3058 notproduct(ccstrlist, SuppressErrorAt, "", \
3051 3059 "List of assertions (file:line) to muzzle") \
3052 3060 \
3053 3061 notproduct(size_t, HandleAllocationLimit, 1024, \
3054 3062 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
3055 3063 "is used") \
3056 3064 \
3057 3065 develop(size_t, TotalHandleAllocationLimit, 1024, \
3058 3066 "Threshold for total handle allocation when " \
3059 3067 "+TraceHandleAllocation is used") \
3060 3068 \
3061 3069 develop(intx, StackPrintLimit, 100, \
3062 3070 "number of stack frames to print in VM-level stack dump") \
3063 3071 \
3064 3072 notproduct(intx, MaxElementPrintSize, 256, \
3065 3073 "maximum number of elements to print") \
3066 3074 \
3067 3075 notproduct(intx, MaxSubklassPrintSize, 4, \
3068 3076 "maximum number of subklasses to print when printing klass") \
3069 3077 \
3070 3078 product(intx, MaxInlineLevel, 9, \
3071 3079 "maximum number of nested calls that are inlined") \
3072 3080 range(0, max_jint) \
3073 3081 \
3074 3082 product(intx, MaxRecursiveInlineLevel, 1, \
3075 3083 "maximum number of nested recursive calls that are inlined") \
3076 3084 range(0, max_jint) \
3077 3085 \
3078 3086 develop(intx, MaxForceInlineLevel, 100, \
3079 3087 "maximum number of nested calls that are forced for inlining " \
3080 3088 "(using CompileCommand or marked w/ @ForceInline)") \
3081 3089 range(0, max_jint) \
3082 3090 \
3083 3091 product_pd(intx, InlineSmallCode, \
3084 3092 "Only inline already compiled methods if their code size is " \
3085 3093 "less than this") \
3086 3094 range(0, max_jint) \
3087 3095 \
3088 3096 product(intx, MaxInlineSize, 35, \
3089 3097 "The maximum bytecode size of a method to be inlined") \
3090 3098 range(0, max_jint) \
3091 3099 \
3092 3100 product_pd(intx, FreqInlineSize, \
3093 3101 "The maximum bytecode size of a frequent method to be inlined") \
3094 3102 range(0, max_jint) \
3095 3103 \
3096 3104 product(intx, MaxTrivialSize, 6, \
3097 3105 "The maximum bytecode size of a trivial method to be inlined") \
3098 3106 range(0, max_jint) \
3099 3107 \
3100 3108 product(intx, MinInliningThreshold, 250, \
3101 3109 "The minimum invocation count a method needs to have to be " \
3102 3110 "inlined") \
3103 3111 range(0, max_jint) \
3104 3112 \
3105 3113 develop(intx, MethodHistogramCutoff, 100, \
3106 3114 "The cutoff value for method invocation histogram (+CountCalls)") \
3107 3115 \
3108 3116 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
3109 3117 "Number of interpreted methods to show in profile") \
3110 3118 \
3111 3119 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
3112 3120 "Number of compiled methods to show in profile") \
3113 3121 \
3114 3122 develop(intx, ProfilerNumberOfStubMethods, 25, \
3115 3123 "Number of stub methods to show in profile") \
3116 3124 \
3117 3125 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
3118 3126 "Number of runtime stub nodes to show in profile") \
3119 3127 \
3120 3128 product(intx, ProfileIntervalsTicks, 100, \
3121 3129 "Number of ticks between printing of interval profile " \
3122 3130 "(+ProfileIntervals)") \
3123 3131 range(0, max_intx) \
3124 3132 \
3125 3133 notproduct(intx, ScavengeALotInterval, 1, \
3126 3134 "Interval between which scavenge will occur with +ScavengeALot") \
3127 3135 \
3128 3136 notproduct(intx, FullGCALotInterval, 1, \
3129 3137 "Interval between which full gc will occur with +FullGCALot") \
3130 3138 \
3131 3139 notproduct(intx, FullGCALotStart, 0, \
3132 3140 "For which invocation to start FullGCAlot") \
3133 3141 \
3134 3142 notproduct(intx, FullGCALotDummies, 32*K, \
3135 3143 "Dummy object allocated with +FullGCALot, forcing all objects " \
3136 3144 "to move") \
3137 3145 \
3138 3146 develop(intx, DontYieldALotInterval, 10, \
3139 3147 "Interval between which yields will be dropped (milliseconds)") \
3140 3148 \
3141 3149 develop(intx, MinSleepInterval, 1, \
3142 3150 "Minimum sleep() interval (milliseconds) when " \
3143 3151 "ConvertSleepToYield is off (used for Solaris)") \
3144 3152 \
3145 3153 develop(intx, ProfilerPCTickThreshold, 15, \
3146 3154 "Number of ticks in a PC buckets to be a hotspot") \
3147 3155 \
3148 3156 notproduct(intx, DeoptimizeALotInterval, 5, \
3149 3157 "Number of exits until DeoptimizeALot kicks in") \
3150 3158 \
3151 3159 notproduct(intx, ZombieALotInterval, 5, \
3152 3160 "Number of exits until ZombieALot kicks in") \
3153 3161 \
3154 3162 diagnostic(intx, MallocVerifyInterval, 0, \
3155 3163 "If non-zero, verify C heap after every N calls to " \
3156 3164 "malloc/realloc/free") \
3157 3165 range(0, max_intx) \
3158 3166 \
3159 3167 diagnostic(intx, MallocVerifyStart, 0, \
3160 3168 "If non-zero, start verifying C heap after Nth call to " \
3161 3169 "malloc/realloc/free") \
3162 3170 range(0, max_intx) \
3163 3171 \
3164 3172 diagnostic(uintx, MallocMaxTestWords, 0, \
3165 3173 "If non-zero, maximum number of words that malloc/realloc can " \
3166 3174 "allocate (for testing only)") \
3167 3175 range(0, max_uintx) \
3168 3176 \
3169 3177 product(intx, TypeProfileWidth, 2, \
3170 3178 "Number of receiver types to record in call/cast profile") \
3171 3179 range(0, 8) \
3172 3180 \
3173 3181 experimental(intx, MethodProfileWidth, 0, \
3174 3182 "Number of methods to record in call profile") \
3175 3183 \
3176 3184 develop(intx, BciProfileWidth, 2, \
3177 3185 "Number of return bci's to record in ret profile") \
3178 3186 \
3179 3187 product(intx, PerMethodRecompilationCutoff, 400, \
3180 3188 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3181 3189 range(-1, max_intx) \
3182 3190 \
3183 3191 product(intx, PerBytecodeRecompilationCutoff, 200, \
3184 3192 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
3185 3193 range(-1, max_intx) \
3186 3194 \
3187 3195 product(intx, PerMethodTrapLimit, 100, \
3188 3196 "Limit on traps (of one kind) in a method (includes inlines)") \
3189 3197 range(0, max_jint) \
3190 3198 \
3191 3199 experimental(intx, PerMethodSpecTrapLimit, 5000, \
3192 3200 "Limit on speculative traps (of one kind) in a method " \
3193 3201 "(includes inlines)") \
3194 3202 range(0, max_jint) \
3195 3203 \
3196 3204 product(intx, PerBytecodeTrapLimit, 4, \
3197 3205 "Limit on traps (of one kind) at a particular BCI") \
3198 3206 range(0, max_jint) \
3199 3207 \
3200 3208 experimental(intx, SpecTrapLimitExtraEntries, 3, \
3201 3209 "Extra method data trap entries for speculation") \
3202 3210 \
3203 3211 develop(intx, InlineFrequencyRatio, 20, \
3204 3212 "Ratio of call site execution to caller method invocation") \
3205 3213 range(0, max_jint) \
3206 3214 \
3207 3215 develop_pd(intx, InlineFrequencyCount, \
3208 3216 "Count of call site execution necessary to trigger frequent " \
3209 3217 "inlining") \
3210 3218 range(0, max_jint) \
3211 3219 \
3212 3220 develop(intx, InlineThrowCount, 50, \
3213 3221 "Force inlining of interpreted methods that throw this often") \
3214 3222 range(0, max_jint) \
3215 3223 \
3216 3224 develop(intx, InlineThrowMaxSize, 200, \
3217 3225 "Force inlining of throwing methods smaller than this") \
3218 3226 range(0, max_jint) \
3219 3227 \
3220 3228 develop(intx, ProfilerNodeSize, 1024, \
3221 3229 "Size in K to allocate for the Profile Nodes of each thread") \
3222 3230 range(0, 1024) \
3223 3231 \
3224 3232 /* gc parameters */ \
3225 3233 product(size_t, InitialHeapSize, 0, \
3226 3234 "Initial heap size (in bytes); zero means use ergonomics") \
3227 3235 constraint(InitialHeapSizeConstraintFunc,AfterErgo) \
3228 3236 \
3229 3237 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \
3230 3238 "Maximum heap size (in bytes)") \
3231 3239 constraint(MaxHeapSizeConstraintFunc,AfterErgo) \
3232 3240 \
3233 3241 product(size_t, OldSize, ScaleForWordSize(4*M), \
3234 3242 "Initial tenured generation size (in bytes)") \
3235 3243 range(0, max_uintx) \
3236 3244 \
3237 3245 product(size_t, NewSize, ScaleForWordSize(1*M), \
3238 3246 "Initial new generation size (in bytes)") \
3239 3247 constraint(NewSizeConstraintFunc,AfterErgo) \
3240 3248 \
3241 3249 product(size_t, MaxNewSize, max_uintx, \
3242 3250 "Maximum new generation size (in bytes), max_uintx means set " \
3243 3251 "ergonomically") \
3244 3252 range(0, max_uintx) \
3245 3253 \
3246 3254 product_pd(size_t, HeapBaseMinAddress, \
3247 3255 "OS specific low limit for heap base address") \
3248 3256 constraint(HeapBaseMinAddressConstraintFunc,AfterErgo) \
3249 3257 \
3250 3258 product(size_t, PretenureSizeThreshold, 0, \
3251 3259 "Maximum size in bytes of objects allocated in DefNew " \
3252 3260 "generation; zero means no maximum") \
3253 3261 range(0, max_uintx) \
3254 3262 \
3255 3263 product(size_t, MinTLABSize, 2*K, \
3256 3264 "Minimum allowed TLAB size (in bytes)") \
3257 3265 range(1, max_uintx) \
3258 3266 constraint(MinTLABSizeConstraintFunc,AfterMemoryInit) \
3259 3267 \
3260 3268 product(size_t, TLABSize, 0, \
3261 3269 "Starting TLAB size (in bytes); zero means set ergonomically") \
3262 3270 constraint(TLABSizeConstraintFunc,AfterMemoryInit) \
3263 3271 \
3264 3272 product(size_t, YoungPLABSize, 4096, \
3265 3273 "Size of young gen promotion LAB's (in HeapWords)") \
3266 3274 constraint(YoungPLABSizeConstraintFunc,AfterMemoryInit) \
3267 3275 \
3268 3276 product(size_t, OldPLABSize, 1024, \
3269 3277 "Size of old gen promotion LAB's (in HeapWords), or Number " \
3270 3278 "of blocks to attempt to claim when refilling CMS LAB's") \
3271 3279 constraint(OldPLABSizeConstraintFunc,AfterMemoryInit) \
3272 3280 \
3273 3281 product(uintx, TLABAllocationWeight, 35, \
3274 3282 "Allocation averaging weight") \
3275 3283 range(0, 100) \
3276 3284 \
3277 3285 /* Limit the lower bound of this flag to 1 as it is used */ \
3278 3286 /* in a division expression. */ \
3279 3287 product(uintx, TLABWasteTargetPercent, 1, \
3280 3288 "Percentage of Eden that can be wasted") \
3281 3289 range(1, 100) \
3282 3290 \
3283 3291 product(uintx, TLABRefillWasteFraction, 64, \
3284 3292 "Maximum TLAB waste at a refill (internal fragmentation)") \
3285 3293 range(1, max_juint) \
3286 3294 \
3287 3295 product(uintx, TLABWasteIncrement, 4, \
3288 3296 "Increment allowed waste at slow allocation") \
3289 3297 range(0, max_jint) \
3290 3298 constraint(TLABWasteIncrementConstraintFunc,AfterMemoryInit) \
3291 3299 \
3292 3300 product(uintx, SurvivorRatio, 8, \
3293 3301 "Ratio of eden/survivor space size") \
3294 3302 range(1, max_uintx-2) \
3295 3303 constraint(SurvivorRatioConstraintFunc,AfterMemoryInit) \
3296 3304 \
3297 3305 product(uintx, NewRatio, 2, \
3298 3306 "Ratio of old/new generation sizes") \
3299 3307 range(0, max_uintx-1) \
3300 3308 \
3301 3309 product_pd(size_t, NewSizeThreadIncrease, \
3302 3310 "Additional size added to desired new generation size per " \
3303 3311 "non-daemon thread (in bytes)") \
3304 3312 range(0, max_uintx) \
3305 3313 \
3306 3314 product_pd(size_t, MetaspaceSize, \
3307 3315 "Initial size of Metaspaces (in bytes)") \
3308 3316 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \
3309 3317 \
3310 3318 product(size_t, MaxMetaspaceSize, max_uintx, \
3311 3319 "Maximum size of Metaspaces (in bytes)") \
3312 3320 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \
3313 3321 \
3314 3322 product(size_t, CompressedClassSpaceSize, 1*G, \
3315 3323 "Maximum size of class area in Metaspace when compressed " \
3316 3324 "class pointers are used") \
3317 3325 range(1*M, 3*G) \
3318 3326 \
3319 3327 manageable(uintx, MinHeapFreeRatio, 40, \
3320 3328 "The minimum percentage of heap free after GC to avoid expansion."\
3321 3329 " For most GCs this applies to the old generation. In G1 and" \
3322 3330 " ParallelGC it applies to the whole heap.") \
3323 3331 range(0, 100) \
3324 3332 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \
3325 3333 \
3326 3334 manageable(uintx, MaxHeapFreeRatio, 70, \
3327 3335 "The maximum percentage of heap free after GC to avoid shrinking."\
3328 3336 " For most GCs this applies to the old generation. In G1 and" \
3329 3337 " ParallelGC it applies to the whole heap.") \
3330 3338 range(0, 100) \
3331 3339 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \
3332 3340 \
3333 3341 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
3334 3342 "Number of milliseconds per MB of free space in the heap") \
3335 3343 range(0, max_intx) \
3336 3344 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \
3337 3345 \
3338 3346 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
3339 3347 "The minimum change in heap space due to GC (in bytes)") \
3340 3348 range(0, max_uintx) \
3341 3349 \
3342 3350 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \
3343 3351 "The minimum expansion of Metaspace (in bytes)") \
3344 3352 range(0, max_uintx) \
3345 3353 \
3346 3354 product(uintx, MaxMetaspaceFreeRatio, 70, \
3347 3355 "The maximum percentage of Metaspace free after GC to avoid " \
3348 3356 "shrinking") \
3349 3357 range(0, 100) \
3350 3358 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \
3351 3359 \
3352 3360 product(uintx, MinMetaspaceFreeRatio, 40, \
3353 3361 "The minimum percentage of Metaspace free after GC to avoid " \
3354 3362 "expansion") \
3355 3363 range(0, 99) \
3356 3364 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \
3357 3365 \
3358 3366 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \
3359 3367 "The maximum expansion of Metaspace without full GC (in bytes)") \
3360 3368 range(0, max_uintx) \
3361 3369 \
3362 3370 product(uintx, QueuedAllocationWarningCount, 0, \
3363 3371 "Number of times an allocation that queues behind a GC " \
3364 3372 "will retry before printing a warning") \
3365 3373 range(0, max_uintx) \
3366 3374 \
3367 3375 diagnostic(uintx, VerifyGCStartAt, 0, \
3368 3376 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3369 3377 range(0, max_uintx) \
3370 3378 \
3371 3379 diagnostic(intx, VerifyGCLevel, 0, \
3372 3380 "Generation level at which to start +VerifyBefore/AfterGC") \
3373 3381 range(0, 1) \
3374 3382 \
3375 3383 product(uintx, MaxTenuringThreshold, 15, \
3376 3384 "Maximum value for tenuring threshold") \
3377 3385 range(0, markOopDesc::max_age + 1) \
3378 3386 constraint(MaxTenuringThresholdConstraintFunc,AfterErgo) \
3379 3387 \
3380 3388 product(uintx, InitialTenuringThreshold, 7, \
3381 3389 "Initial value for tenuring threshold") \
3382 3390 range(0, markOopDesc::max_age + 1) \
3383 3391 constraint(InitialTenuringThresholdConstraintFunc,AfterErgo) \
3384 3392 \
3385 3393 product(uintx, TargetSurvivorRatio, 50, \
3386 3394 "Desired percentage of survivor space used after scavenge") \
3387 3395 range(0, 100) \
3388 3396 \
3389 3397 product(uintx, MarkSweepDeadRatio, 5, \
3390 3398 "Percentage (0-100) of the old gen allowed as dead wood. " \
3391 3399 "Serial mark sweep treats this as both the minimum and maximum " \
3392 3400 "value. " \
3393 3401 "CMS uses this value only if it falls back to mark sweep. " \
3394 3402 "Par compact uses a variable scale based on the density of the " \
3395 3403 "generation and treats this as the maximum value when the heap " \
3396 3404 "is either completely full or completely empty. Par compact " \
3397 3405 "also has a smaller default value; see arguments.cpp.") \
3398 3406 range(0, 100) \
3399 3407 \
3400 3408 product(uintx, MarkSweepAlwaysCompactCount, 4, \
3401 3409 "How often should we fully compact the heap (ignoring the dead " \
3402 3410 "space parameters)") \
3403 3411 range(1, max_uintx) \
3404 3412 \
3405 3413 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3406 3414 "Delay between expansion and allocation (in milliseconds)") \
3407 3415 \
3408 3416 develop(uintx, GCWorkerDelayMillis, 0, \
3409 3417 "Delay in scheduling GC workers (in milliseconds)") \
3410 3418 \
3411 3419 product(intx, DeferThrSuspendLoopCount, 4000, \
3412 3420 "(Unstable) Number of times to iterate in safepoint loop " \
3413 3421 "before blocking VM threads ") \
3414 3422 range(-1, max_jint-1) \
3415 3423 \
3416 3424 product(intx, DeferPollingPageLoopCount, -1, \
3417 3425 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3418 3426 "before changing safepoint polling page to RO ") \
3419 3427 range(-1, max_jint-1) \
3420 3428 \
3421 3429 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3422 3430 range(0, max_intx) \
3423 3431 \
3424 3432 product(bool, PSChunkLargeArrays, true, \
3425 3433 "Process large arrays in chunks") \
3426 3434 \
3427 3435 product(uintx, GCDrainStackTargetSize, 64, \
3428 3436 "Number of entries we will try to leave on the stack " \
3429 3437 "during parallel gc") \
3430 3438 range(0, max_juint) \
3431 3439 \
3432 3440 /* stack parameters */ \
3433 3441 product_pd(intx, StackYellowPages, \
3434 3442 "Number of yellow zone (recoverable overflows) pages") \
3435 3443 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \
3436 3444 \
3437 3445 product_pd(intx, StackRedPages, \
3438 3446 "Number of red zone (unrecoverable overflows) pages") \
3439 3447 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \
3440 3448 \
3441 3449 product_pd(intx, StackReservedPages, \
3442 3450 "Number of reserved zone (reserved to annotated methods) pages") \
3443 3451 range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\
3444 3452 \
3445 3453 product(bool, RestrictReservedStack, true, \
3446 3454 "Restrict @ReservedStackAccess to trusted classes") \
3447 3455 \
3448 3456 /* greater stack shadow pages can't generate instruction to bang stack */ \
3449 3457 product_pd(intx, StackShadowPages, \
3450 3458 "Number of shadow zone (for overflow checking) pages " \
3451 3459 "this should exceed the depth of the VM and native call stack") \
3452 3460 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \
3453 3461 \
3454 3462 product_pd(intx, ThreadStackSize, \
3455 3463 "Thread Stack Size (in Kbytes)") \
3456 3464 range(0, max_intx-os::vm_page_size()) \
3457 3465 \
3458 3466 product_pd(intx, VMThreadStackSize, \
3459 3467 "Non-Java Thread Stack Size (in Kbytes)") \
3460 3468 range(0, max_intx/(1 * K)) \
3461 3469 \
3462 3470 product_pd(intx, CompilerThreadStackSize, \
3463 3471 "Compiler Thread Stack Size (in Kbytes)") \
3464 3472 range(0, max_intx /(1 * K)) \
3465 3473 \
3466 3474 develop_pd(size_t, JVMInvokeMethodSlack, \
3467 3475 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3468 3476 \
3469 3477 /* code cache parameters */ \
3470 3478 /* ppc64/tiered compilation has large code-entry alignment. */ \
3471 3479 develop(uintx, CodeCacheSegmentSize, \
3472 3480 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)), \
3473 3481 "Code cache segment size (in bytes) - smallest unit of " \
3474 3482 "allocation") \
3475 3483 range(1, 1024) \
3476 3484 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \
3477 3485 \
3478 3486 develop_pd(intx, CodeEntryAlignment, \
3479 3487 "Code entry alignment for generated code (in bytes)") \
3480 3488 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \
3481 3489 \
3482 3490 product_pd(intx, OptoLoopAlignment, \
3483 3491 "Align inner loops to zero relative to this modulus") \
3484 3492 range(1, 16) \
3485 3493 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \
3486 3494 \
3487 3495 product_pd(uintx, InitialCodeCacheSize, \
3488 3496 "Initial code cache size (in bytes)") \
3489 3497 range(0, max_uintx) \
3490 3498 \
3491 3499 develop_pd(uintx, CodeCacheMinimumUseSpace, \
3492 3500 "Minimum code cache size (in bytes) required to start VM.") \
3493 3501 range(0, max_uintx) \
3494 3502 \
3495 3503 product(bool, SegmentedCodeCache, false, \
3496 3504 "Use a segmented code cache") \
3497 3505 \
3498 3506 product_pd(uintx, ReservedCodeCacheSize, \
3499 3507 "Reserved code cache size (in bytes) - maximum code cache size") \
3500 3508 range(0, max_uintx) \
3501 3509 \
3502 3510 product_pd(uintx, NonProfiledCodeHeapSize, \
3503 3511 "Size of code heap with non-profiled methods (in bytes)") \
3504 3512 range(0, max_uintx) \
3505 3513 \
3506 3514 product_pd(uintx, ProfiledCodeHeapSize, \
3507 3515 "Size of code heap with profiled methods (in bytes)") \
3508 3516 range(0, max_uintx) \
3509 3517 \
3510 3518 product_pd(uintx, NonNMethodCodeHeapSize, \
3511 3519 "Size of code heap with non-nmethods (in bytes)") \
3512 3520 range(0, max_uintx) \
3513 3521 \
3514 3522 product_pd(uintx, CodeCacheExpansionSize, \
3515 3523 "Code cache expansion size (in bytes)") \
3516 3524 range(0, max_uintx) \
3517 3525 \
3518 3526 develop_pd(uintx, CodeCacheMinBlockLength, \
3519 3527 "Minimum number of segments in a code cache block") \
3520 3528 range(1, 100) \
3521 3529 \
3522 3530 notproduct(bool, ExitOnFullCodeCache, false, \
3523 3531 "Exit the VM if we fill the code cache") \
3524 3532 \
3525 3533 product(bool, UseCodeCacheFlushing, true, \
3526 3534 "Remove cold/old nmethods from the code cache") \
3527 3535 \
3528 3536 product(uintx, StartAggressiveSweepingAt, 10, \
3529 3537 "Start aggressive sweeping if X[%] of the code cache is free." \
3530 3538 "Segmented code cache: X[%] of the non-profiled heap." \
3531 3539 "Non-segmented code cache: X[%] of the total code cache") \
3532 3540 range(0, 100) \
3533 3541 \
3534 3542 /* interpreter debugging */ \
3535 3543 develop(intx, BinarySwitchThreshold, 5, \
3536 3544 "Minimal number of lookupswitch entries for rewriting to binary " \
3537 3545 "switch") \
3538 3546 \
3539 3547 develop(intx, StopInterpreterAt, 0, \
3540 3548 "Stop interpreter execution at specified bytecode number") \
3541 3549 \
3542 3550 develop(intx, TraceBytecodesAt, 0, \
3543 3551 "Trace bytecodes starting with specified bytecode number") \
3544 3552 \
3545 3553 /* compiler interface */ \
3546 3554 develop(intx, CIStart, 0, \
3547 3555 "The id of the first compilation to permit") \
3548 3556 \
3549 3557 develop(intx, CIStop, max_jint, \
3550 3558 "The id of the last compilation to permit") \
3551 3559 \
3552 3560 develop(intx, CIStartOSR, 0, \
3553 3561 "The id of the first osr compilation to permit " \
3554 3562 "(CICountOSR must be on)") \
3555 3563 \
3556 3564 develop(intx, CIStopOSR, max_jint, \
3557 3565 "The id of the last osr compilation to permit " \
3558 3566 "(CICountOSR must be on)") \
3559 3567 \
3560 3568 develop(intx, CIBreakAtOSR, -1, \
3561 3569 "The id of osr compilation to break at") \
3562 3570 \
3563 3571 develop(intx, CIBreakAt, -1, \
3564 3572 "The id of compilation to break at") \
3565 3573 \
3566 3574 product(ccstrlist, CompileOnly, "", \
3567 3575 "List of methods (pkg/class.name) to restrict compilation to") \
3568 3576 \
3569 3577 product(ccstr, CompileCommandFile, NULL, \
3570 3578 "Read compiler commands from this file [.hotspot_compiler]") \
3571 3579 \
3572 3580 diagnostic(ccstr, CompilerDirectivesFile, NULL, \
3573 3581 "Read compiler directives from this file") \
3574 3582 \
3575 3583 product(ccstrlist, CompileCommand, "", \
3576 3584 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3577 3585 \
3578 3586 develop(bool, ReplayCompiles, false, \
3579 3587 "Enable replay of compilations from ReplayDataFile") \
3580 3588 \
3581 3589 product(ccstr, ReplayDataFile, NULL, \
3582 3590 "File containing compilation replay information" \
3583 3591 "[default: ./replay_pid%p.log] (%p replaced with pid)") \
3584 3592 \
3585 3593 product(ccstr, InlineDataFile, NULL, \
3586 3594 "File containing inlining replay information" \
3587 3595 "[default: ./inline_pid%p.log] (%p replaced with pid)") \
3588 3596 \
3589 3597 develop(intx, ReplaySuppressInitializers, 2, \
3590 3598 "Control handling of class initialization during replay: " \
3591 3599 "0 - don't do anything special; " \
3592 3600 "1 - treat all class initializers as empty; " \
3593 3601 "2 - treat class initializers for application classes as empty; " \
3594 3602 "3 - allow all class initializers to run during bootstrap but " \
3595 3603 " pretend they are empty after starting replay") \
3596 3604 range(0, 3) \
3597 3605 \
3598 3606 develop(bool, ReplayIgnoreInitErrors, false, \
3599 3607 "Ignore exceptions thrown during initialization for replay") \
3600 3608 \
3601 3609 product(bool, DumpReplayDataOnError, true, \
3602 3610 "Record replay data for crashing compiler threads") \
3603 3611 \
3604 3612 product(bool, CICompilerCountPerCPU, false, \
3605 3613 "1 compiler thread for log(N CPUs)") \
3606 3614 \
3607 3615 develop(intx, CIFireOOMAt, -1, \
3608 3616 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3609 3617 "(non-negative value throws OOM after this many CI accesses " \
3610 3618 "in each compile)") \
3611 3619 notproduct(intx, CICrashAt, -1, \
3612 3620 "id of compilation to trigger assert in compiler thread for " \
3613 3621 "the purpose of testing, e.g. generation of replay data") \
3614 3622 notproduct(bool, CIObjectFactoryVerify, false, \
3615 3623 "enable potentially expensive verification in ciObjectFactory") \
3616 3624 \
3617 3625 /* Priorities */ \
3618 3626 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3619 3627 \
3620 3628 product(intx, ThreadPriorityPolicy, 0, \
3621 3629 "0 : Normal. "\
3622 3630 " VM chooses priorities that are appropriate for normal "\
3623 3631 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3624 3632 " to normal native priority. Java priorities below " \
3625 3633 " NORM_PRIORITY map to lower native priority values. On "\
3626 3634 " Windows applications are allowed to use higher native "\
3627 3635 " priorities. However, with ThreadPriorityPolicy=0, VM will "\
3628 3636 " not use the highest possible native priority, "\
3629 3637 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\
3630 3638 " system threads. On Linux thread priorities are ignored "\
3631 3639 " because the OS does not support static priority in "\
3632 3640 " SCHED_OTHER scheduling class which is the only choice for "\
3633 3641 " non-root, non-realtime applications. "\
3634 3642 "1 : Aggressive. "\
3635 3643 " Java thread priorities map over to the entire range of "\
3636 3644 " native thread priorities. Higher Java thread priorities map "\
3637 3645 " to higher native thread priorities. This policy should be "\
3638 3646 " used with care, as sometimes it can cause performance "\
3639 3647 " degradation in the application and/or the entire system. On "\
3640 3648 " Linux this policy requires root privilege.") \
3641 3649 range(0, 1) \
3642 3650 \
3643 3651 product(bool, ThreadPriorityVerbose, false, \
3644 3652 "Print priority changes") \
3645 3653 \
3646 3654 product(intx, CompilerThreadPriority, -1, \
3647 3655 "The native priority at which compiler threads should run " \
3648 3656 "(-1 means no change)") \
3649 3657 range(min_jint, max_jint) \
3650 3658 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \
3651 3659 \
3652 3660 product(intx, VMThreadPriority, -1, \
3653 3661 "The native priority at which the VM thread should run " \
3654 3662 "(-1 means no change)") \
3655 3663 range(-1, 127) \
3656 3664 \
3657 3665 product(bool, CompilerThreadHintNoPreempt, true, \
3658 3666 "(Solaris only) Give compiler threads an extra quanta") \
3659 3667 \
3660 3668 product(bool, VMThreadHintNoPreempt, false, \
3661 3669 "(Solaris only) Give VM thread an extra quanta") \
3662 3670 \
3663 3671 product(intx, JavaPriority1_To_OSPriority, -1, \
3664 3672 "Map Java priorities to OS priorities") \
3665 3673 range(-1, 127) \
3666 3674 \
3667 3675 product(intx, JavaPriority2_To_OSPriority, -1, \
3668 3676 "Map Java priorities to OS priorities") \
3669 3677 range(-1, 127) \
3670 3678 \
3671 3679 product(intx, JavaPriority3_To_OSPriority, -1, \
3672 3680 "Map Java priorities to OS priorities") \
3673 3681 range(-1, 127) \
3674 3682 \
3675 3683 product(intx, JavaPriority4_To_OSPriority, -1, \
3676 3684 "Map Java priorities to OS priorities") \
3677 3685 range(-1, 127) \
3678 3686 \
3679 3687 product(intx, JavaPriority5_To_OSPriority, -1, \
3680 3688 "Map Java priorities to OS priorities") \
3681 3689 range(-1, 127) \
3682 3690 \
3683 3691 product(intx, JavaPriority6_To_OSPriority, -1, \
3684 3692 "Map Java priorities to OS priorities") \
3685 3693 range(-1, 127) \
3686 3694 \
3687 3695 product(intx, JavaPriority7_To_OSPriority, -1, \
3688 3696 "Map Java priorities to OS priorities") \
3689 3697 range(-1, 127) \
3690 3698 \
3691 3699 product(intx, JavaPriority8_To_OSPriority, -1, \
3692 3700 "Map Java priorities to OS priorities") \
3693 3701 range(-1, 127) \
3694 3702 \
3695 3703 product(intx, JavaPriority9_To_OSPriority, -1, \
3696 3704 "Map Java priorities to OS priorities") \
3697 3705 range(-1, 127) \
3698 3706 \
3699 3707 product(intx, JavaPriority10_To_OSPriority,-1, \
3700 3708 "Map Java priorities to OS priorities") \
3701 3709 range(-1, 127) \
3702 3710 \
3703 3711 experimental(bool, UseCriticalJavaThreadPriority, false, \
3704 3712 "Java thread priority 10 maps to critical scheduling priority") \
3705 3713 \
3706 3714 experimental(bool, UseCriticalCompilerThreadPriority, false, \
3707 3715 "Compiler thread(s) run at critical scheduling priority") \
3708 3716 \
3709 3717 experimental(bool, UseCriticalCMSThreadPriority, false, \
3710 3718 "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3711 3719 \
3712 3720 /* compiler debugging */ \
3713 3721 notproduct(intx, CompileTheWorldStartAt, 1, \
3714 3722 "First class to consider when using +CompileTheWorld") \
3715 3723 \
3716 3724 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3717 3725 "Last class to consider when using +CompileTheWorld") \
3718 3726 \
3719 3727 develop(intx, NewCodeParameter, 0, \
3720 3728 "Testing Only: Create a dedicated integer parameter before " \
3721 3729 "putback") \
3722 3730 \
3723 3731 /* new oopmap storage allocation */ \
3724 3732 develop(intx, MinOopMapAllocation, 8, \
3725 3733 "Minimum number of OopMap entries in an OopMapSet") \
3726 3734 \
3727 3735 /* Background Compilation */ \
3728 3736 develop(intx, LongCompileThreshold, 50, \
3729 3737 "Used with +TraceLongCompiles") \
3730 3738 \
3731 3739 /* recompilation */ \
3732 3740 product_pd(intx, CompileThreshold, \
3733 3741 "number of interpreted method invocations before (re-)compiling") \
3734 3742 constraint(CompileThresholdConstraintFunc, AfterErgo) \
3735 3743 \
3736 3744 product(double, CompileThresholdScaling, 1.0, \
3737 3745 "Factor to control when first compilation happens " \
3738 3746 "(both with and without tiered compilation): " \
3739 3747 "values greater than 1.0 delay counter overflow, " \
3740 3748 "values between 0 and 1.0 rush counter overflow, " \
3741 3749 "value of 1.0 leaves compilation thresholds unchanged " \
3742 3750 "value of 0.0 is equivalent to -Xint. " \
3743 3751 "" \
3744 3752 "Flag can be set as per-method option. " \
3745 3753 "If a value is specified for a method, compilation thresholds " \
3746 3754 "for that method are scaled by both the value of the global flag "\
3747 3755 "and the value of the per-method flag.") \
3748 3756 range(0.0, DBL_MAX) \
3749 3757 \
3750 3758 product(intx, Tier0InvokeNotifyFreqLog, 7, \
3751 3759 "Interpreter (tier 0) invocation notification frequency") \
3752 3760 range(0, 30) \
3753 3761 \
3754 3762 product(intx, Tier2InvokeNotifyFreqLog, 11, \
3755 3763 "C1 without MDO (tier 2) invocation notification frequency") \
3756 3764 range(0, 30) \
3757 3765 \
3758 3766 product(intx, Tier3InvokeNotifyFreqLog, 10, \
3759 3767 "C1 with MDO profiling (tier 3) invocation notification " \
3760 3768 "frequency") \
3761 3769 range(0, 30) \
3762 3770 \
3763 3771 product(intx, Tier23InlineeNotifyFreqLog, 20, \
3764 3772 "Inlinee invocation (tiers 2 and 3) notification frequency") \
3765 3773 range(0, 30) \
3766 3774 \
3767 3775 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
3768 3776 "Interpreter (tier 0) invocation notification frequency") \
3769 3777 range(0, 30) \
3770 3778 \
3771 3779 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
3772 3780 "C1 without MDO (tier 2) invocation notification frequency") \
3773 3781 range(0, 30) \
3774 3782 \
3775 3783 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
3776 3784 "C1 with MDO profiling (tier 3) invocation notification " \
3777 3785 "frequency") \
3778 3786 range(0, 30) \
3779 3787 \
3780 3788 product(intx, Tier2CompileThreshold, 0, \
3781 3789 "threshold at which tier 2 compilation is invoked") \
3782 3790 range(0, max_jint) \
3783 3791 \
3784 3792 product(intx, Tier2BackEdgeThreshold, 0, \
3785 3793 "Back edge threshold at which tier 2 compilation is invoked") \
3786 3794 range(0, max_jint) \
3787 3795 \
3788 3796 product(intx, Tier3InvocationThreshold, 200, \
3789 3797 "Compile if number of method invocations crosses this " \
3790 3798 "threshold") \
3791 3799 range(0, max_jint) \
3792 3800 \
3793 3801 product(intx, Tier3MinInvocationThreshold, 100, \
3794 3802 "Minimum invocation to compile at tier 3") \
3795 3803 range(0, max_jint) \
3796 3804 \
3797 3805 product(intx, Tier3CompileThreshold, 2000, \
3798 3806 "Threshold at which tier 3 compilation is invoked (invocation " \
3799 3807 "minimum must be satisfied)") \
3800 3808 range(0, max_jint) \
3801 3809 \
3802 3810 product(intx, Tier3BackEdgeThreshold, 60000, \
3803 3811 "Back edge threshold at which tier 3 OSR compilation is invoked") \
3804 3812 range(0, max_jint) \
3805 3813 \
3806 3814 product(intx, Tier4InvocationThreshold, 5000, \
3807 3815 "Compile if number of method invocations crosses this " \
3808 3816 "threshold") \
3809 3817 range(0, max_jint) \
3810 3818 \
3811 3819 product(intx, Tier4MinInvocationThreshold, 600, \
3812 3820 "Minimum invocation to compile at tier 4") \
3813 3821 range(0, max_jint) \
3814 3822 \
3815 3823 product(intx, Tier4CompileThreshold, 15000, \
3816 3824 "Threshold at which tier 4 compilation is invoked (invocation " \
3817 3825 "minimum must be satisfied") \
3818 3826 range(0, max_jint) \
3819 3827 \
3820 3828 product(intx, Tier4BackEdgeThreshold, 40000, \
3821 3829 "Back edge threshold at which tier 4 OSR compilation is invoked") \
3822 3830 range(0, max_jint) \
3823 3831 \
3824 3832 product(intx, Tier3DelayOn, 5, \
3825 3833 "If C2 queue size grows over this amount per compiler thread " \
3826 3834 "stop compiling at tier 3 and start compiling at tier 2") \
3827 3835 range(0, max_jint) \
3828 3836 \
3829 3837 product(intx, Tier3DelayOff, 2, \
3830 3838 "If C2 queue size is less than this amount per compiler thread " \
3831 3839 "allow methods compiled at tier 2 transition to tier 3") \
3832 3840 range(0, max_jint) \
3833 3841 \
3834 3842 product(intx, Tier3LoadFeedback, 5, \
3835 3843 "Tier 3 thresholds will increase twofold when C1 queue size " \
3836 3844 "reaches this amount per compiler thread") \
3837 3845 range(0, max_jint) \
3838 3846 \
3839 3847 product(intx, Tier4LoadFeedback, 3, \
3840 3848 "Tier 4 thresholds will increase twofold when C2 queue size " \
3841 3849 "reaches this amount per compiler thread") \
3842 3850 range(0, max_jint) \
3843 3851 \
3844 3852 product(intx, TieredCompileTaskTimeout, 50, \
3845 3853 "Kill compile task if method was not used within " \
3846 3854 "given timeout in milliseconds") \
3847 3855 range(0, max_intx) \
3848 3856 \
3849 3857 product(intx, TieredStopAtLevel, 4, \
3850 3858 "Stop at given compilation level") \
3851 3859 range(0, 4) \
3852 3860 \
3853 3861 product(intx, Tier0ProfilingStartPercentage, 200, \
3854 3862 "Start profiling in interpreter if the counters exceed tier 3 " \
3855 3863 "thresholds by the specified percentage") \
3856 3864 range(0, max_jint) \
3857 3865 \
3858 3866 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \
3859 3867 "Increase the compile threshold for C1 compilation if the code " \
3860 3868 "cache is filled by the specified percentage") \
3861 3869 range(0, 99) \
3862 3870 \
3863 3871 product(intx, TieredRateUpdateMinTime, 1, \
3864 3872 "Minimum rate sampling interval (in milliseconds)") \
3865 3873 range(0, max_intx) \
3866 3874 \
3867 3875 product(intx, TieredRateUpdateMaxTime, 25, \
3868 3876 "Maximum rate sampling interval (in milliseconds)") \
3869 3877 range(0, max_intx) \
3870 3878 \
3871 3879 product_pd(bool, TieredCompilation, \
3872 3880 "Enable tiered compilation") \
3873 3881 \
3874 3882 product(bool, PrintTieredEvents, false, \
3875 3883 "Print tiered events notifications") \
3876 3884 \
3877 3885 product_pd(intx, OnStackReplacePercentage, \
3878 3886 "NON_TIERED number of method invocations/branches (expressed as " \
3879 3887 "% of CompileThreshold) before (re-)compiling OSR code") \
3880 3888 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \
3881 3889 \
3882 3890 product(intx, InterpreterProfilePercentage, 33, \
3883 3891 "NON_TIERED number of method invocations/branches (expressed as " \
3884 3892 "% of CompileThreshold) before profiling in the interpreter") \
3885 3893 range(0, 100) \
3886 3894 \
3887 3895 develop(intx, MaxRecompilationSearchLength, 10, \
3888 3896 "The maximum number of frames to inspect when searching for " \
3889 3897 "recompilee") \
3890 3898 \
3891 3899 develop(intx, MaxInterpretedSearchLength, 3, \
3892 3900 "The maximum number of interpreted frames to skip when searching "\
3893 3901 "for recompilee") \
3894 3902 \
3895 3903 develop(intx, DesiredMethodLimit, 8000, \
3896 3904 "The desired maximum method size (in bytecodes) after inlining") \
3897 3905 \
3898 3906 develop(intx, HugeMethodLimit, 8000, \
3899 3907 "Don't compile methods larger than this if " \
3900 3908 "+DontCompileHugeMethods") \
3901 3909 \
3902 3910 /* New JDK 1.4 reflection implementation */ \
3903 3911 \
3904 3912 develop(intx, FastSuperclassLimit, 8, \
3905 3913 "Depth of hardwired instanceof accelerator array") \
3906 3914 \
3907 3915 /* Properties for Java libraries */ \
3908 3916 \
3909 3917 product(size_t, MaxDirectMemorySize, 0, \
3910 3918 "Maximum total size of NIO direct-buffer allocations") \
3911 3919 range(0, (size_t)SIZE_MAX) \
3912 3920 \
3913 3921 /* Flags used for temporary code during development */ \
3914 3922 \
3915 3923 diagnostic(bool, UseNewCode, false, \
3916 3924 "Testing Only: Use the new version while testing") \
3917 3925 \
3918 3926 diagnostic(bool, UseNewCode2, false, \
3919 3927 "Testing Only: Use the new version while testing") \
3920 3928 \
3921 3929 diagnostic(bool, UseNewCode3, false, \
3922 3930 "Testing Only: Use the new version while testing") \
3923 3931 \
3924 3932 /* flags for performance data collection */ \
3925 3933 \
3926 3934 product(bool, UsePerfData, falseInEmbedded, \
3927 3935 "Flag to disable jvmstat instrumentation for performance testing "\
3928 3936 "and problem isolation purposes") \
3929 3937 \
3930 3938 product(bool, PerfDataSaveToFile, false, \
3931 3939 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3932 3940 \
3933 3941 product(ccstr, PerfDataSaveFile, NULL, \
3934 3942 "Save PerfData memory to the specified absolute pathname. " \
3935 3943 "The string %p in the file name (if present) " \
3936 3944 "will be replaced by pid") \
3937 3945 \
3938 3946 product(intx, PerfDataSamplingInterval, 50, \
3939 3947 "Data sampling interval (in milliseconds)") \
3940 3948 range(PeriodicTask::min_interval, max_jint) \
3941 3949 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \
3942 3950 \
3943 3951 develop(bool, PerfTraceDataCreation, false, \
3944 3952 "Trace creation of Performance Data Entries") \
3945 3953 \
3946 3954 develop(bool, PerfTraceMemOps, false, \
3947 3955 "Trace PerfMemory create/attach/detach calls") \
3948 3956 \
3949 3957 product(bool, PerfDisableSharedMem, false, \
3950 3958 "Store performance data in standard memory") \
3951 3959 \
3952 3960 product(intx, PerfDataMemorySize, 64*K, \
3953 3961 "Size of performance data memory region. Will be rounded " \
3954 3962 "up to a multiple of the native os page size.") \
3955 3963 range(128, 32*64*K) \
3956 3964 \
3957 3965 product(intx, PerfMaxStringConstLength, 1024, \
3958 3966 "Maximum PerfStringConstant string length before truncation") \
3959 3967 range(32, 32*K) \
3960 3968 \
3961 3969 product(bool, PerfAllowAtExitRegistration, false, \
3962 3970 "Allow registration of atexit() methods") \
3963 3971 \
3964 3972 product(bool, PerfBypassFileSystemCheck, false, \
3965 3973 "Bypass Win32 file system criteria checks (Windows Only)") \
3966 3974 \
3967 3975 product(intx, UnguardOnExecutionViolation, 0, \
3968 3976 "Unguard page and retry on no-execute fault (Win32 only) " \
3969 3977 "0=off, 1=conservative, 2=aggressive") \
3970 3978 range(0, 2) \
3971 3979 \
3972 3980 /* Serviceability Support */ \
3973 3981 \
3974 3982 product(bool, ManagementServer, false, \
3975 3983 "Create JMX Management Server") \
3976 3984 \
3977 3985 product(bool, DisableAttachMechanism, false, \
3978 3986 "Disable mechanism that allows tools to attach to this VM") \
3979 3987 \
3980 3988 product(bool, StartAttachListener, false, \
3981 3989 "Always start Attach Listener at VM startup") \
3982 3990 \
3983 3991 manageable(bool, PrintConcurrentLocks, false, \
3984 3992 "Print java.util.concurrent locks in thread dump") \
3985 3993 \
3986 3994 product(bool, TransmitErrorReport, false, \
3987 3995 "Enable error report transmission on erroneous termination") \
3988 3996 \
3989 3997 product(ccstr, ErrorReportServer, NULL, \
3990 3998 "Override built-in error report server address") \
3991 3999 \
3992 4000 /* Shared spaces */ \
3993 4001 \
3994 4002 product(bool, UseSharedSpaces, true, \
3995 4003 "Use shared spaces for metadata") \
3996 4004 \
3997 4005 product(bool, VerifySharedSpaces, false, \
3998 4006 "Verify shared spaces (false for default archive, true for " \
3999 4007 "archive specified by -XX:SharedArchiveFile)") \
4000 4008 \
4001 4009 product(bool, RequireSharedSpaces, false, \
4002 4010 "Require shared spaces for metadata") \
4003 4011 \
4004 4012 product(bool, DumpSharedSpaces, false, \
4005 4013 "Special mode: JVM reads a class list, loads classes, builds " \
4006 4014 "shared spaces, and dumps the shared spaces to a file to be " \
4007 4015 "used in future JVM runs") \
4008 4016 \
4009 4017 product(bool, PrintSharedSpaces, false, \
4010 4018 "Print usage of shared spaces") \
4011 4019 \
4012 4020 product(bool, PrintSharedArchiveAndExit, false, \
4013 4021 "Print shared archive file contents") \
4014 4022 \
4015 4023 product(bool, PrintSharedDictionary, false, \
4016 4024 "If PrintSharedArchiveAndExit is true, also print the shared " \
4017 4025 "dictionary") \
4018 4026 \
4019 4027 product(size_t, SharedReadWriteSize, DEFAULT_SHARED_READ_WRITE_SIZE, \
4020 4028 "Size of read-write space for metadata (in bytes)") \
4021 4029 range(MIN_SHARED_READ_WRITE_SIZE, MAX_SHARED_READ_WRITE_SIZE) \
4022 4030 \
4023 4031 product(size_t, SharedReadOnlySize, DEFAULT_SHARED_READ_ONLY_SIZE, \
4024 4032 "Size of read-only space for metadata (in bytes)") \
4025 4033 range(MIN_SHARED_READ_ONLY_SIZE, MAX_SHARED_READ_ONLY_SIZE) \
4026 4034 \
4027 4035 product(size_t, SharedMiscDataSize, DEFAULT_SHARED_MISC_DATA_SIZE, \
4028 4036 "Size of the shared miscellaneous data area (in bytes)") \
4029 4037 range(MIN_SHARED_MISC_DATA_SIZE, MAX_SHARED_MISC_DATA_SIZE) \
4030 4038 \
4031 4039 product(size_t, SharedMiscCodeSize, DEFAULT_SHARED_MISC_CODE_SIZE, \
4032 4040 "Size of the shared miscellaneous code area (in bytes)") \
4033 4041 range(MIN_SHARED_MISC_CODE_SIZE, MAX_SHARED_MISC_CODE_SIZE) \
4034 4042 \
4035 4043 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \
4036 4044 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \
4037 4045 "Address to allocate shared memory region for class data") \
4038 4046 range(0, SIZE_MAX) \
4039 4047 \
4040 4048 product(uintx, SharedSymbolTableBucketSize, 4, \
4041 4049 "Average number of symbols per bucket in shared table") \
4042 4050 range(2, 246) \
4043 4051 \
4044 4052 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \
4045 4053 "Do not quit -Xshare:dump even if we encounter unverifiable " \
4046 4054 "classes. Just exclude them from the shared dictionary.") \
4047 4055 \
4048 4056 diagnostic(bool, PrintMethodHandleStubs, false, \
4049 4057 "Print generated stub code for method handles") \
4050 4058 \
4051 4059 develop(bool, TraceMethodHandles, false, \
4052 4060 "trace internal method handle operations") \
4053 4061 \
4054 4062 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
4055 4063 "perform extra checks when constructing method handles") \
4056 4064 \
4057 4065 diagnostic(bool, ShowHiddenFrames, false, \
4058 4066 "show method handle implementation frames (usually hidden)") \
4059 4067 \
4060 4068 experimental(bool, TrustFinalNonStaticFields, false, \
4061 4069 "trust final non-static declarations for constant folding") \
4062 4070 \
4063 4071 diagnostic(bool, FoldStableValues, true, \
4064 4072 "Optimize loads from stable fields (marked w/ @Stable)") \
4065 4073 \
4066 4074 develop(bool, TraceInvokeDynamic, false, \
4067 4075 "trace internal invoke dynamic operations") \
4068 4076 \
4069 4077 diagnostic(bool, PauseAtStartup, false, \
4070 4078 "Causes the VM to pause at startup time and wait for the pause " \
4071 4079 "file to be removed (default: ./vm.paused.<pid>)") \
4072 4080 \
4073 4081 diagnostic(ccstr, PauseAtStartupFile, NULL, \
4074 4082 "The file to create and for whose removal to await when pausing " \
4075 4083 "at startup. (default: ./vm.paused.<pid>)") \
4076 4084 \
4077 4085 diagnostic(bool, PauseAtExit, false, \
4078 4086 "Pause and wait for keypress on exit if a debugger is attached") \
4079 4087 \
4080 4088 product(bool, ExtendedDTraceProbes, false, \
4081 4089 "Enable performance-impacting dtrace probes") \
4082 4090 \
4083 4091 product(bool, DTraceMethodProbes, false, \
4084 4092 "Enable dtrace probes for method-entry and method-exit") \
4085 4093 \
4086 4094 product(bool, DTraceAllocProbes, false, \
4087 4095 "Enable dtrace probes for object allocation") \
4088 4096 \
4089 4097 product(bool, DTraceMonitorProbes, false, \
4090 4098 "Enable dtrace probes for monitor events") \
4091 4099 \
4092 4100 product(bool, RelaxAccessControlCheck, false, \
4093 4101 "Relax the access control checks in the verifier") \
4094 4102 \
4095 4103 product(uintx, StringTableSize, defaultStringTableSize, \
4096 4104 "Number of buckets in the interned String table") \
4097 4105 range(minimumStringTableSize, 111*defaultStringTableSize) \
4098 4106 \
4099 4107 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \
4100 4108 "Number of buckets in the JVM internal Symbol table") \
4101 4109 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \
4102 4110 \
4103 4111 product(bool, UseStringDeduplication, false, \
4104 4112 "Use string deduplication") \
4105 4113 \
4106 4114 product(uintx, StringDeduplicationAgeThreshold, 3, \
4107 4115 "A string must reach this age (or be promoted to an old region) " \
4108 4116 "to be considered for deduplication") \
4109 4117 range(1, markOopDesc::max_age) \
4110 4118 \
4111 4119 diagnostic(bool, StringDeduplicationResizeALot, false, \
4112 4120 "Force table resize every time the table is scanned") \
4113 4121 \
4114 4122 diagnostic(bool, StringDeduplicationRehashALot, false, \
4115 4123 "Force table rehash every time the table is scanned") \
4116 4124 \
4117 4125 diagnostic(bool, WhiteBoxAPI, false, \
4118 4126 "Enable internal testing APIs") \
4119 4127 \
4120 4128 experimental(intx, SurvivorAlignmentInBytes, 0, \
4121 4129 "Default survivor space alignment in bytes") \
4122 4130 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \
4123 4131 \
4124 4132 product(bool , AllowNonVirtualCalls, false, \
4125 4133 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \
4126 4134 \
4127 4135 product(ccstr, DumpLoadedClassList, NULL, \
4128 4136 "Dump the names all loaded classes, that could be stored into " \
4129 4137 "the CDS archive, in the specified file") \
4130 4138 \
4131 4139 product(ccstr, SharedClassListFile, NULL, \
4132 4140 "Override the default CDS class list") \
4133 4141 \
4134 4142 diagnostic(ccstr, SharedArchiveFile, NULL, \
4135 4143 "Override the default location of the CDS archive file") \
4136 4144 \
4137 4145 product(ccstr, ExtraSharedClassListFile, NULL, \
4138 4146 "Extra classlist for building the CDS archive file") \
4139 4147 \
4140 4148 experimental(size_t, ArrayAllocatorMallocLimit, \
4141 4149 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \
4142 4150 "Allocation less than this value will be allocated " \
4143 4151 "using malloc. Larger allocations will use mmap.") \
4144 4152 \
4145 4153 experimental(bool, AlwaysAtomicAccesses, false, \
4146 4154 "Accesses to all variables should always be atomic") \
4147 4155 \
4148 4156 product(bool, EnableTracing, false, \
4149 4157 "Enable event-based tracing") \
4150 4158 \
4151 4159 product(bool, UseLockedTracing, false, \
4152 4160 "Use locked-tracing when doing event-based tracing") \
4153 4161 \
4154 4162 diagnostic(bool, UseUnalignedAccesses, false, \
4155 4163 "Use unaligned memory accesses in Unsafe") \
4156 4164 \
4157 4165 product_pd(bool, PreserveFramePointer, \
4158 4166 "Use the FP register for holding the frame pointer " \
4159 4167 "and not as a general purpose register.") \
4160 4168 \
4161 4169 diagnostic(bool, CheckIntrinsics, true, \
4162 4170 "When a class C is loaded, check that " \
4163 4171 "(1) all intrinsics defined by the VM for class C are present "\
4164 4172 "in the loaded class file and are marked with the " \
4165 4173 "@HotSpotIntrinsicCandidate annotation, that " \
4166 4174 "(2) there is an intrinsic registered for all loaded methods " \
4167 4175 "that are annotated with the @HotSpotIntrinsicCandidate " \
4168 4176 "annotation, and that " \
4169 4177 "(3) no orphan methods exist for class C (i.e., methods for " \
4170 4178 "which the VM declares an intrinsic but that are not declared "\
4171 4179 "in the loaded class C. " \
4172 4180 "Check (3) is available only in debug builds.") \
4173 4181 \
4174 4182 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \
4175 4183 "Disable backwards compatibility for compile commands.") \
4176 4184 \
4177 4185 diagnostic(bool, PrintCompilerDirectives, false, \
4178 4186 "Print compiler directives on installation.")
4179 4187
4180 4188 /*
4181 4189 * Macros for factoring of globals
4182 4190 */
4183 4191
4184 4192 // Interface macros
4185 4193 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4186 4194 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
4187 4195 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
4188 4196 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
4189 4197 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
4190 4198 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
4191 4199 #ifdef PRODUCT
4192 4200 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value;
4193 4201 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name;
4194 4202 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value;
4195 4203 #else
4196 4204 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
4197 4205 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
4198 4206 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4199 4207 #endif // PRODUCT
4200 4208 // Special LP64 flags, product only needed for now.
4201 4209 #ifdef _LP64
4202 4210 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4203 4211 #else
4204 4212 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
4205 4213 #endif // _LP64
4206 4214
4207 4215 // Implementation macros
4208 4216 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
4209 4217 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
4210 4218 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
4211 4219 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
4212 4220 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
4213 4221 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
4214 4222 #ifdef PRODUCT
4215 4223 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)
4216 4224 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)
4217 4225 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
4218 4226 #else
4219 4227 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
4220 4228 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
4221 4229 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
4222 4230 #endif // PRODUCT
4223 4231 #ifdef _LP64
4224 4232 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
4225 4233 #else
4226 4234 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
4227 4235 #endif // _LP64
4228 4236
4229 4237 // Only materialize src code for range checking when required, ignore otherwise
4230 4238 #define IGNORE_RANGE(a, b)
4231 4239 // Only materialize src code for contraint checking when required, ignore otherwise
4232 4240 #define IGNORE_CONSTRAINT(func,type)
4233 4241
4234 4242 RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \
4235 4243 DECLARE_PD_DEVELOPER_FLAG, \
4236 4244 DECLARE_PRODUCT_FLAG, \
4237 4245 DECLARE_PD_PRODUCT_FLAG, \
4238 4246 DECLARE_DIAGNOSTIC_FLAG, \
4239 4247 DECLARE_EXPERIMENTAL_FLAG, \
4240 4248 DECLARE_NOTPRODUCT_FLAG, \
4241 4249 DECLARE_MANAGEABLE_FLAG, \
4242 4250 DECLARE_PRODUCT_RW_FLAG, \
4243 4251 DECLARE_LP64_PRODUCT_FLAG, \
4244 4252 IGNORE_RANGE, \
4245 4253 IGNORE_CONSTRAINT)
4246 4254
4247 4255 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \
4248 4256 DECLARE_PD_DEVELOPER_FLAG, \
4249 4257 DECLARE_PRODUCT_FLAG, \
4250 4258 DECLARE_PD_PRODUCT_FLAG, \
4251 4259 DECLARE_DIAGNOSTIC_FLAG, \
4252 4260 DECLARE_NOTPRODUCT_FLAG, \
4253 4261 IGNORE_RANGE, \
4254 4262 IGNORE_CONSTRAINT)
4255 4263
4256 4264 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \
4257 4265 DECLARE_PRODUCT_FLAG, \
4258 4266 DECLARE_DIAGNOSTIC_FLAG, \
4259 4267 DECLARE_EXPERIMENTAL_FLAG, \
4260 4268 DECLARE_NOTPRODUCT_FLAG, \
4261 4269 IGNORE_RANGE, \
4262 4270 IGNORE_CONSTRAINT)
4263 4271
4264 4272 // Extensions
4265 4273
4266 4274 #include "runtime/globals_ext.hpp"
4267 4275
4268 4276 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP
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