1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
26 #define SHARE_VM_RUNTIME_GLOBALS_HPP
27
28 #include "utilities/debug.hpp"
29
30 // use this for flags that are true per default in the tiered build
31 // but false in non-tiered builds, and vice versa
32 #ifdef TIERED
33 #define trueInTiered true
34 #define falseInTiered false
35 #else
36 #define trueInTiered false
37 #define falseInTiered true
38 #endif
39
40 #ifdef TARGET_ARCH_x86
41 # include "globals_x86.hpp"
42 #endif
43 #ifdef TARGET_ARCH_sparc
44 # include "globals_sparc.hpp"
45 #endif
46 #ifdef TARGET_ARCH_zero
47 # include "globals_zero.hpp"
48 #endif
49 #ifdef TARGET_ARCH_arm
50 # include "globals_arm.hpp"
51 #endif
52 #ifdef TARGET_ARCH_ppc
53 # include "globals_ppc.hpp"
54 #endif
55 #ifdef TARGET_ARCH_aarch64
56 # include "globals_aarch64.hpp"
57 #endif
58 #ifdef TARGET_OS_FAMILY_linux
59 # include "globals_linux.hpp"
60 #endif
61 #ifdef TARGET_OS_FAMILY_solaris
62 # include "globals_solaris.hpp"
63 #endif
64 #ifdef TARGET_OS_FAMILY_windows
65 # include "globals_windows.hpp"
66 #endif
67 #ifdef TARGET_OS_FAMILY_aix
68 # include "globals_aix.hpp"
69 #endif
70 #ifdef TARGET_OS_FAMILY_bsd
71 # include "globals_bsd.hpp"
72 #endif
73 #ifdef TARGET_OS_ARCH_linux_x86
74 # include "globals_linux_x86.hpp"
75 #endif
76 #ifdef TARGET_OS_ARCH_linux_sparc
77 # include "globals_linux_sparc.hpp"
78 #endif
79 #ifdef TARGET_OS_ARCH_linux_zero
80 # include "globals_linux_zero.hpp"
81 #endif
82 #ifdef TARGET_OS_ARCH_solaris_x86
83 # include "globals_solaris_x86.hpp"
84 #endif
85 #ifdef TARGET_OS_ARCH_solaris_sparc
86 # include "globals_solaris_sparc.hpp"
87 #endif
88 #ifdef TARGET_OS_ARCH_windows_x86
89 # include "globals_windows_x86.hpp"
90 #endif
91 #ifdef TARGET_OS_ARCH_linux_arm
92 # include "globals_linux_arm.hpp"
93 #endif
94 #ifdef TARGET_OS_ARCH_linux_ppc
95 # include "globals_linux_ppc.hpp"
96 #endif
97 #ifdef TARGET_OS_ARCH_linux_aarch64
98 # include "globals_linux_aarch64.hpp"
99 #endif
100 #ifdef TARGET_OS_ARCH_aix_ppc
101 # include "globals_aix_ppc.hpp"
102 #endif
103 #ifdef TARGET_OS_ARCH_bsd_x86
104 # include "globals_bsd_x86.hpp"
105 #endif
106 #ifdef TARGET_OS_ARCH_bsd_zero
107 # include "globals_bsd_zero.hpp"
108 #endif
109 #ifdef COMPILER1
110 #ifdef TARGET_ARCH_x86
111 # include "c1_globals_x86.hpp"
112 #endif
113 #ifdef TARGET_ARCH_sparc
114 # include "c1_globals_sparc.hpp"
115 #endif
116 #ifdef TARGET_ARCH_arm
117 # include "c1_globals_arm.hpp"
118 #endif
119 #ifdef TARGET_ARCH_aarch64
120 # include "c1_globals_aarch64.hpp"
121 #endif
122 #ifdef TARGET_OS_FAMILY_linux
123 # include "c1_globals_linux.hpp"
124 #endif
125 #ifdef TARGET_OS_FAMILY_solaris
126 # include "c1_globals_solaris.hpp"
127 #endif
128 #ifdef TARGET_OS_FAMILY_windows
129 # include "c1_globals_windows.hpp"
130 #endif
131 #ifdef TARGET_OS_FAMILY_aix
132 # include "c1_globals_aix.hpp"
133 #endif
134 #ifdef TARGET_OS_FAMILY_bsd
135 # include "c1_globals_bsd.hpp"
136 #endif
137 #ifdef TARGET_ARCH_ppc
138 # include "c1_globals_ppc.hpp"
139 #endif
140 #endif
141 #ifdef COMPILER2
142 #ifdef TARGET_ARCH_x86
143 # include "c2_globals_x86.hpp"
144 #endif
145 #ifdef TARGET_ARCH_sparc
146 # include "c2_globals_sparc.hpp"
147 #endif
148 #ifdef TARGET_ARCH_arm
149 # include "c2_globals_arm.hpp"
150 #endif
151 #ifdef TARGET_ARCH_ppc
152 # include "c2_globals_ppc.hpp"
153 #endif
154 #ifdef TARGET_ARCH_aarch64
155 # include "c2_globals_aarch64.hpp"
156 #endif
157 #ifdef TARGET_OS_FAMILY_linux
158 # include "c2_globals_linux.hpp"
159 #endif
160 #ifdef TARGET_OS_FAMILY_solaris
161 # include "c2_globals_solaris.hpp"
162 #endif
163 #ifdef TARGET_OS_FAMILY_windows
164 # include "c2_globals_windows.hpp"
165 #endif
166 #ifdef TARGET_OS_FAMILY_aix
167 # include "c2_globals_aix.hpp"
168 #endif
169 #ifdef TARGET_OS_FAMILY_bsd
170 # include "c2_globals_bsd.hpp"
171 #endif
172 #endif
173 #ifdef SHARK
174 #ifdef TARGET_ARCH_zero
175 # include "shark_globals_zero.hpp"
176 #endif
177 #endif
178
179 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
180 define_pd_global(bool, BackgroundCompilation, false);
181 define_pd_global(bool, UseTLAB, false);
182 define_pd_global(bool, CICompileOSR, false);
183 define_pd_global(bool, UseTypeProfile, false);
184 define_pd_global(bool, UseOnStackReplacement, false);
185 define_pd_global(bool, InlineIntrinsics, false);
186 define_pd_global(bool, PreferInterpreterNativeStubs, true);
187 define_pd_global(bool, ProfileInterpreter, false);
188 define_pd_global(bool, ProfileTraps, false);
189 define_pd_global(bool, TieredCompilation, false);
190
191 define_pd_global(intx, CompileThreshold, 0);
192
193 define_pd_global(intx, OnStackReplacePercentage, 0);
194 define_pd_global(bool, ResizeTLAB, false);
195 define_pd_global(intx, FreqInlineSize, 0);
196 define_pd_global(intx, NewSizeThreadIncrease, 4*K);
197 define_pd_global(intx, InlineClassNatives, true);
198 define_pd_global(intx, InlineUnsafeOps, true);
199 define_pd_global(intx, InitialCodeCacheSize, 160*K);
200 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
201 define_pd_global(intx, NonProfiledCodeHeapSize, 0);
202 define_pd_global(intx, ProfiledCodeHeapSize, 0);
203 define_pd_global(intx, NonNMethodCodeHeapSize, 32*M);
204
205 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
206 define_pd_global(intx, CodeCacheMinBlockLength, 1);
207 define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K);
208 define_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M));
209 define_pd_global(bool, NeverActAsServerClassMachine, true);
210 define_pd_global(uint64_t,MaxRAM, 1ULL*G);
211 #define CI_COMPILER_COUNT 0
212 #else
213
214 #ifdef COMPILER2
215 #define CI_COMPILER_COUNT 2
216 #else
217 #define CI_COMPILER_COUNT 1
218 #endif // COMPILER2
219
220 #endif // no compilers
221
222 // string type aliases used only in this file
223 typedef const char* ccstr;
224 typedef const char* ccstrlist; // represents string arguments which accumulate
225
226 struct Flag {
227 enum Flags {
228 // value origin
229 DEFAULT = 0,
230 COMMAND_LINE = 1,
231 ENVIRON_VAR = 2,
232 CONFIG_FILE = 3,
233 MANAGEMENT = 4,
234 ERGONOMIC = 5,
235 ATTACH_ON_DEMAND = 6,
236 INTERNAL = 7,
237
238 LAST_VALUE_ORIGIN = INTERNAL,
239 VALUE_ORIGIN_BITS = 4,
240 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
241
242 // flag kind
243 KIND_PRODUCT = 1 << 4,
244 KIND_MANAGEABLE = 1 << 5,
245 KIND_DIAGNOSTIC = 1 << 6,
246 KIND_EXPERIMENTAL = 1 << 7,
247 KIND_NOT_PRODUCT = 1 << 8,
248 KIND_DEVELOP = 1 << 9,
249 KIND_PLATFORM_DEPENDENT = 1 << 10,
250 KIND_READ_WRITE = 1 << 11,
251 KIND_C1 = 1 << 12,
252 KIND_C2 = 1 << 13,
253 KIND_ARCH = 1 << 14,
254 KIND_SHARK = 1 << 15,
255 KIND_LP64_PRODUCT = 1 << 16,
256 KIND_COMMERCIAL = 1 << 17,
257
258 KIND_MASK = ~VALUE_ORIGIN_MASK
259 };
260
261 const char* _type;
262 const char* _name;
263 void* _addr;
264 NOT_PRODUCT(const char* _doc;)
265 Flags _flags;
266
267 // points to all Flags static array
268 static Flag* flags;
269
270 // number of flags
271 static size_t numFlags;
272
273 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false);
274 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
275
276 void check_writable();
277
278 bool is_bool() const;
279 bool get_bool() const;
280 void set_bool(bool value);
281
282 bool is_intx() const;
283 intx get_intx() const;
284 void set_intx(intx value);
285
286 bool is_uintx() const;
287 uintx get_uintx() const;
288 void set_uintx(uintx value);
289
290 bool is_uint64_t() const;
291 uint64_t get_uint64_t() const;
292 void set_uint64_t(uint64_t value);
293
294 bool is_size_t() const;
295 size_t get_size_t() const;
296 void set_size_t(size_t value);
297
298 bool is_double() const;
299 double get_double() const;
300 void set_double(double value);
301
302 bool is_ccstr() const;
303 bool ccstr_accumulates() const;
304 ccstr get_ccstr() const;
305 void set_ccstr(ccstr value);
306
307 Flags get_origin();
308 void set_origin(Flags origin);
309
310 bool is_default();
311 bool is_ergonomic();
312 bool is_command_line();
313
314 bool is_product() const;
315 bool is_manageable() const;
316 bool is_diagnostic() const;
317 bool is_experimental() const;
318 bool is_notproduct() const;
319 bool is_develop() const;
320 bool is_read_write() const;
321 bool is_commercial() const;
322
323 bool is_constant_in_binary() const;
324
325 bool is_unlocker() const;
326 bool is_unlocked() const;
327 bool is_writeable() const;
328 bool is_external() const;
329
330 bool is_unlocker_ext() const;
331 bool is_unlocked_ext() const;
332 bool is_writeable_ext() const;
333 bool is_external_ext() const;
334
335 void unlock_diagnostic();
336
337 void get_locked_message(char*, int) const;
338 void get_locked_message_ext(char*, int) const;
339
340 void print_on(outputStream* st, bool withComments = false );
341 void print_kind(outputStream* st);
342 void print_as_flag(outputStream* st);
343 };
344
345 // debug flags control various aspects of the VM and are global accessible
346
347 // use FlagSetting to temporarily change some debug flag
348 // e.g. FlagSetting fs(DebugThisAndThat, true);
349 // restored to previous value upon leaving scope
350 class FlagSetting {
351 bool val;
352 bool* flag;
353 public:
354 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
355 ~FlagSetting() { *flag = val; }
356 };
357
358
359 class CounterSetting {
360 intx* counter;
361 public:
362 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
363 ~CounterSetting() { (*counter)--; }
364 };
365
366
367 class UIntFlagSetting {
368 uintx val;
369 uintx* flag;
370 public:
371 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
372 ~UIntFlagSetting() { *flag = val; }
373 };
374
375 class DoubleFlagSetting {
376 double val;
377 double* flag;
378 public:
379 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
380 ~DoubleFlagSetting() { *flag = val; }
381 };
382
383 class SizeTFlagSetting {
384 size_t val;
385 size_t* flag;
386 public:
387 SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; }
388 ~SizeTFlagSetting() { *flag = val; }
389 };
390
391
392 class CommandLineFlags {
393 public:
394 static bool boolAt(const char* name, size_t len, bool* value);
395 static bool boolAt(const char* name, bool* value) { return boolAt(name, strlen(name), value); }
396 static bool boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin);
397 static bool boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); }
398
399 static bool intxAt(const char* name, size_t len, intx* value);
400 static bool intxAt(const char* name, intx* value) { return intxAt(name, strlen(name), value); }
401 static bool intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin);
402 static bool intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); }
403
404 static bool uintxAt(const char* name, size_t len, uintx* value);
405 static bool uintxAt(const char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
406 static bool uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin);
407 static bool uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
408
409 static bool size_tAt(const char* name, size_t len, size_t* value);
410 static bool size_tAt(const char* name, size_t* value) { return size_tAt(name, strlen(name), value); }
411 static bool size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin);
412 static bool size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); }
413
414 static bool uint64_tAt(const char* name, size_t len, uint64_t* value);
415 static bool uint64_tAt(const char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
416 static bool uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin);
417 static bool uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
418
419 static bool doubleAt(const char* name, size_t len, double* value);
420 static bool doubleAt(const char* name, double* value) { return doubleAt(name, strlen(name), value); }
421 static bool doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin);
422 static bool doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
423
424 static bool ccstrAt(const char* name, size_t len, ccstr* value);
425 static bool ccstrAt(const char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
426 // Contract: Flag will make private copy of the incoming value.
427 // Outgoing value is always malloc-ed, and caller MUST call free.
428 static bool ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin);
429 static bool ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
430
431 // Returns false if name is not a command line flag.
432 static bool wasSetOnCmdline(const char* name, bool* value);
433 static void printSetFlags(outputStream* out);
434
435 static void printFlags(outputStream* out, bool withComments);
436
437 static void verify() PRODUCT_RETURN;
438 };
439
440 // use this for flags that are true by default in the debug version but
441 // false in the optimized version, and vice versa
442 #ifdef ASSERT
443 #define trueInDebug true
444 #define falseInDebug false
445 #else
446 #define trueInDebug false
447 #define falseInDebug true
448 #endif
449
450 // use this for flags that are true per default in the product build
451 // but false in development builds, and vice versa
452 #ifdef PRODUCT
453 #define trueInProduct true
454 #define falseInProduct false
455 #else
456 #define trueInProduct false
457 #define falseInProduct true
458 #endif
459
460 #ifdef JAVASE_EMBEDDED
461 #define falseInEmbedded false
462 #else
463 #define falseInEmbedded true
464 #endif
465
466 // develop flags are settable / visible only during development and are constant in the PRODUCT version
467 // product flags are always settable / visible
468 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
469
470 // A flag must be declared with one of the following types:
471 // bool, intx, uintx, ccstr, double, or uint64_t.
472 // The type "ccstr" is an alias for "const char*" and is used
473 // only in this file, because the macrology requires single-token type names.
474
475 // Note: Diagnostic options not meant for VM tuning or for product modes.
476 // They are to be used for VM quality assurance or field diagnosis
477 // of VM bugs. They are hidden so that users will not be encouraged to
478 // try them as if they were VM ordinary execution options. However, they
479 // are available in the product version of the VM. Under instruction
480 // from support engineers, VM customers can turn them on to collect
481 // diagnostic information about VM problems. To use a VM diagnostic
482 // option, you must first specify +UnlockDiagnosticVMOptions.
483 // (This master switch also affects the behavior of -Xprintflags.)
484 //
485 // experimental flags are in support of features that are not
486 // part of the officially supported product, but are available
487 // for experimenting with. They could, for example, be performance
488 // features that may not have undergone full or rigorous QA, but which may
489 // help performance in some cases and released for experimentation
490 // by the community of users and developers. This flag also allows one to
491 // be able to build a fully supported product that nonetheless also
492 // ships with some unsupported, lightly tested, experimental features.
493 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
494 // UnlockExperimentalVMOptions flag, which allows the control and
495 // modification of the experimental flags.
496 //
497 // Nota bene: neither diagnostic nor experimental options should be used casually,
498 // and they are not supported on production loads, except under explicit
499 // direction from support engineers.
500 //
501 // manageable flags are writeable external product flags.
502 // They are dynamically writeable through the JDK management interface
503 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
504 // These flags are external exported interface (see CCC). The list of
505 // manageable flags can be queried programmatically through the management
506 // interface.
507 //
508 // A flag can be made as "manageable" only if
509 // - the flag is defined in a CCC as an external exported interface.
510 // - the VM implementation supports dynamic setting of the flag.
511 // This implies that the VM must *always* query the flag variable
512 // and not reuse state related to the flag state at any given time.
513 // - you want the flag to be queried programmatically by the customers.
514 //
515 // product_rw flags are writeable internal product flags.
516 // They are like "manageable" flags but for internal/private use.
517 // The list of product_rw flags are internal/private flags which
518 // may be changed/removed in a future release. It can be set
519 // through the management interface to get/set value
520 // when the name of flag is supplied.
521 //
522 // A flag can be made as "product_rw" only if
523 // - the VM implementation supports dynamic setting of the flag.
524 // This implies that the VM must *always* query the flag variable
525 // and not reuse state related to the flag state at any given time.
526 //
527 // Note that when there is a need to support develop flags to be writeable,
528 // it can be done in the same way as product_rw.
529
530 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
531 \
532 lp64_product(bool, UseCompressedOops, false, \
533 "Use 32-bit object references in 64-bit VM. " \
534 "lp64_product means flag is always constant in 32 bit VM") \
535 \
536 lp64_product(bool, UseCompressedClassPointers, false, \
537 "Use 32-bit class pointers in 64-bit VM. " \
538 "lp64_product means flag is always constant in 32 bit VM") \
539 \
540 notproduct(bool, CheckCompressedOops, true, \
541 "Generate checks in encoding/decoding code in debug VM") \
542 \
543 product_pd(uintx, HeapBaseMinAddress, \
544 "OS specific low limit for heap base address") \
545 \
546 diagnostic(bool, PrintCompressedOopsMode, false, \
547 "Print compressed oops base address and encoding mode") \
548 \
549 lp64_product(intx, ObjectAlignmentInBytes, 8, \
550 "Default object alignment in bytes, 8 is minimum") \
551 \
552 product(bool, AssumeMP, false, \
553 "Instruct the VM to assume multiple processors are available") \
554 \
555 /* UseMembar is theoretically a temp flag used for memory barrier \
556 * removal testing. It was supposed to be removed before FCS but has \
557 * been re-added (see 6401008) */ \
558 product_pd(bool, UseMembar, \
559 "(Unstable) Issues membars on thread state transitions") \
560 \
561 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
562 "Clean the chunk pool asynchronously") \
563 \
564 experimental(bool, AlwaysSafeConstructors, false, \
565 "Force safe construction, as if all fields are final.") \
566 \
567 /* Temporary: See 6948537 */ \
568 experimental(bool, UseMemSetInBOT, true, \
569 "(Unstable) uses memset in BOT updates in GC code") \
570 \
571 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
572 "Enable normal processing of flags relating to field diagnostics")\
573 \
574 experimental(bool, UnlockExperimentalVMOptions, false, \
575 "Enable normal processing of flags relating to experimental " \
576 "features") \
577 \
578 product(bool, JavaMonitorsInStackTrace, true, \
579 "Print information about Java monitor locks when the stacks are" \
580 "dumped") \
581 \
582 product_pd(bool, UseLargePages, \
583 "Use large page memory") \
584 \
585 product_pd(bool, UseLargePagesIndividualAllocation, \
586 "Allocate large pages individually for better affinity") \
587 \
588 develop(bool, LargePagesIndividualAllocationInjectError, false, \
589 "Fail large pages individual allocation") \
590 \
591 product(bool, UseLargePagesInMetaspace, false, \
592 "Use large page memory in metaspace. " \
593 "Only used if UseLargePages is enabled.") \
594 \
595 develop(bool, TracePageSizes, false, \
596 "Trace page size selection and usage") \
597 \
598 product(bool, UseNUMA, false, \
599 "Use NUMA if available") \
600 \
601 product(bool, UseNUMAInterleaving, false, \
602 "Interleave memory across NUMA nodes if available") \
603 \
604 product(uintx, NUMAInterleaveGranularity, 2*M, \
605 "Granularity to use for NUMA interleaving on Windows OS") \
606 \
607 product(bool, ForceNUMA, false, \
608 "Force NUMA optimizations on single-node/UMA systems") \
609 \
610 product(uintx, NUMAChunkResizeWeight, 20, \
611 "Percentage (0-100) used to weight the current sample when " \
612 "computing exponentially decaying average for " \
613 "AdaptiveNUMAChunkSizing") \
614 \
615 product(uintx, NUMASpaceResizeRate, 1*G, \
616 "Do not reallocate more than this amount per collection") \
617 \
618 product(bool, UseAdaptiveNUMAChunkSizing, true, \
619 "Enable adaptive chunk sizing for NUMA") \
620 \
621 product(bool, NUMAStats, false, \
622 "Print NUMA stats in detailed heap information") \
623 \
624 product(uintx, NUMAPageScanRate, 256, \
625 "Maximum number of pages to include in the page scan procedure") \
626 \
627 product_pd(bool, NeedsDeoptSuspend, \
628 "True for register window machines (sparc/ia64)") \
629 \
630 product(intx, UseSSE, 99, \
631 "Highest supported SSE instructions set on x86/x64") \
632 \
633 product(bool, UseAES, false, \
634 "Control whether AES instructions can be used on x86/x64") \
635 \
636 product(bool, UseSHA, false, \
637 "Control whether SHA instructions can be used on SPARC") \
638 \
639 product(uintx, LargePageSizeInBytes, 0, \
640 "Large page size (0 to let VM choose the page size)") \
641 \
642 product(uintx, LargePageHeapSizeThreshold, 128*M, \
643 "Use large pages if maximum heap is at least this big") \
644 \
645 product(bool, ForceTimeHighResolution, false, \
646 "Using high time resolution (for Win32 only)") \
647 \
648 develop(bool, TraceItables, false, \
649 "Trace initialization and use of itables") \
650 \
651 develop(bool, TracePcPatching, false, \
652 "Trace usage of frame::patch_pc") \
653 \
654 develop(bool, TraceJumps, false, \
655 "Trace assembly jumps in thread ring buffer") \
656 \
657 develop(bool, TraceRelocator, false, \
658 "Trace the bytecode relocator") \
659 \
660 develop(bool, TraceLongCompiles, false, \
661 "Print out every time compilation is longer than " \
662 "a given threshold") \
663 \
664 develop(bool, SafepointALot, false, \
665 "Generate a lot of safepoints. This works with " \
666 "GuaranteedSafepointInterval") \
667 \
668 product_pd(bool, BackgroundCompilation, \
669 "A thread requesting compilation is not blocked during " \
670 "compilation") \
671 \
672 product(bool, PrintVMQWaitTime, false, \
673 "Print out the waiting time in VM operation queue") \
674 \
675 develop(bool, NoYieldsInMicrolock, false, \
676 "Disable yields in microlock") \
677 \
678 develop(bool, TraceOopMapGeneration, false, \
679 "Show OopMapGeneration") \
680 \
681 product(bool, MethodFlushing, true, \
682 "Reclamation of zombie and not-entrant methods") \
683 \
684 develop(bool, VerifyStack, false, \
685 "Verify stack of each thread when it is entering a runtime call") \
686 \
687 diagnostic(bool, ForceUnreachable, false, \
688 "Make all non code cache addresses to be unreachable by " \
689 "forcing use of 64bit literal fixups") \
690 \
691 notproduct(bool, StressDerivedPointers, false, \
692 "Force scavenge when a derived pointer is detected on stack " \
693 "after rtm call") \
694 \
695 develop(bool, TraceDerivedPointers, false, \
696 "Trace traversal of derived pointers on stack") \
697 \
698 notproduct(bool, TraceCodeBlobStacks, false, \
699 "Trace stack-walk of codeblobs") \
700 \
701 product(bool, PrintJNIResolving, false, \
702 "Used to implement -v:jni") \
703 \
704 notproduct(bool, PrintRewrites, false, \
705 "Print methods that are being rewritten") \
706 \
707 product(bool, UseInlineCaches, true, \
708 "Use Inline Caches for virtual calls ") \
709 \
710 develop(bool, InlineArrayCopy, true, \
711 "Inline arraycopy native that is known to be part of " \
712 "base library DLL") \
713 \
714 develop(bool, InlineObjectHash, true, \
715 "Inline Object::hashCode() native that is known to be part " \
716 "of base library DLL") \
717 \
718 develop(bool, InlineNatives, true, \
719 "Inline natives that are known to be part of base library DLL") \
720 \
721 develop(bool, InlineMathNatives, true, \
722 "Inline SinD, CosD, etc.") \
723 \
724 develop(bool, InlineClassNatives, true, \
725 "Inline Class.isInstance, etc") \
726 \
727 develop(bool, InlineThreadNatives, true, \
728 "Inline Thread.currentThread, etc") \
729 \
730 develop(bool, InlineUnsafeOps, true, \
731 "Inline memory ops (native methods) from sun.misc.Unsafe") \
732 \
733 product(bool, CriticalJNINatives, true, \
734 "Check for critical JNI entry points") \
735 \
736 notproduct(bool, StressCriticalJNINatives, false, \
737 "Exercise register saving code in critical natives") \
738 \
739 product(bool, UseSSE42Intrinsics, false, \
740 "SSE4.2 versions of intrinsics") \
741 \
742 product(bool, UseAESIntrinsics, false, \
743 "Use intrinsics for AES versions of crypto") \
744 \
745 product(bool, UseSHA1Intrinsics, false, \
746 "Use intrinsics for SHA-1 crypto hash function") \
747 \
748 product(bool, UseSHA256Intrinsics, false, \
749 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions") \
750 \
751 product(bool, UseSHA512Intrinsics, false, \
752 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions") \
753 \
754 product(bool, UseCRC32Intrinsics, false, \
755 "use intrinsics for java.util.zip.CRC32") \
756 \
757 develop(bool, TraceCallFixup, false, \
758 "Trace all call fixups") \
759 \
760 develop(bool, DeoptimizeALot, false, \
761 "Deoptimize at every exit from the runtime system") \
762 \
763 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
764 "A comma separated list of bcis to deoptimize at") \
765 \
766 product(bool, DeoptimizeRandom, false, \
767 "Deoptimize random frames on random exit from the runtime system")\
768 \
769 notproduct(bool, ZombieALot, false, \
770 "Create zombies (non-entrant) at exit from the runtime system") \
771 \
772 product(bool, UnlinkSymbolsALot, false, \
773 "Unlink unreferenced symbols from the symbol table at safepoints")\
774 \
775 notproduct(bool, WalkStackALot, false, \
776 "Trace stack (no print) at every exit from the runtime system") \
777 \
778 product(bool, Debugging, false, \
779 "Set when executing debug methods in debug.cpp " \
780 "(to prevent triggering assertions)") \
781 \
782 notproduct(bool, StrictSafepointChecks, trueInDebug, \
783 "Enable strict checks that safepoints cannot happen for threads " \
784 "that use No_Safepoint_Verifier") \
785 \
786 notproduct(bool, VerifyLastFrame, false, \
787 "Verify oops on last frame on entry to VM") \
788 \
789 develop(bool, TraceHandleAllocation, false, \
790 "Print out warnings when suspiciously many handles are allocated")\
791 \
792 product(bool, UseCompilerSafepoints, true, \
793 "Stop at safepoints in compiled code") \
794 \
795 product(bool, FailOverToOldVerifier, true, \
796 "Fail over to old verifier when split verifier fails") \
797 \
798 develop(bool, ShowSafepointMsgs, false, \
799 "Show message about safepoint synchronization") \
800 \
801 product(bool, SafepointTimeout, false, \
802 "Time out and warn or fail after SafepointTimeoutDelay " \
803 "milliseconds if failed to reach safepoint") \
804 \
805 develop(bool, DieOnSafepointTimeout, false, \
806 "Die upon failure to reach safepoint (see SafepointTimeout)") \
807 \
808 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
809 /* typically, at most a few retries are needed */ \
810 product(intx, SuspendRetryCount, 50, \
811 "Maximum retry count for an external suspend request") \
812 \
813 product(intx, SuspendRetryDelay, 5, \
814 "Milliseconds to delay per retry (* current_retry_count)") \
815 \
816 product(bool, AssertOnSuspendWaitFailure, false, \
817 "Assert/Guarantee on external suspend wait failure") \
818 \
819 product(bool, TraceSuspendWaitFailures, false, \
820 "Trace external suspend wait failures") \
821 \
822 product(bool, MaxFDLimit, true, \
823 "Bump the number of file descriptors to maximum in Solaris") \
824 \
825 diagnostic(bool, LogEvents, true, \
826 "Enable the various ring buffer event logs") \
827 \
828 diagnostic(uintx, LogEventsBufferEntries, 10, \
829 "Number of ring buffer event logs") \
830 \
831 product(bool, BytecodeVerificationRemote, true, \
832 "Enable the Java bytecode verifier for remote classes") \
833 \
834 product(bool, BytecodeVerificationLocal, false, \
835 "Enable the Java bytecode verifier for local classes") \
836 \
837 develop(bool, ForceFloatExceptions, trueInDebug, \
838 "Force exceptions on FP stack under/overflow") \
839 \
840 develop(bool, VerifyStackAtCalls, false, \
841 "Verify that the stack pointer is unchanged after calls") \
842 \
843 develop(bool, TraceJavaAssertions, false, \
844 "Trace java language assertions") \
845 \
846 notproduct(bool, CheckAssertionStatusDirectives, false, \
847 "Temporary - see javaClasses.cpp") \
848 \
849 notproduct(bool, PrintMallocFree, false, \
850 "Trace calls to C heap malloc/free allocation") \
851 \
852 product(bool, PrintOopAddress, false, \
853 "Always print the location of the oop") \
854 \
855 notproduct(bool, VerifyCodeCache, false, \
856 "Verify code cache on memory allocation/deallocation") \
857 \
858 develop(bool, ZapDeadCompiledLocals, false, \
859 "Zap dead locals in compiler frames") \
860 \
861 notproduct(bool, ZapDeadLocalsOld, false, \
862 "Zap dead locals (old version, zaps all frames when " \
863 "entering the VM") \
864 \
865 notproduct(bool, CheckOopishValues, false, \
866 "Warn if value contains oop (requires ZapDeadLocals)") \
867 \
868 develop(bool, UseMallocOnly, false, \
869 "Use only malloc/free for allocation (no resource area/arena)") \
870 \
871 develop(bool, PrintMalloc, false, \
872 "Print all malloc/free calls") \
873 \
874 develop(bool, PrintMallocStatistics, false, \
875 "Print malloc/free statistics") \
876 \
877 develop(bool, ZapResourceArea, trueInDebug, \
878 "Zap freed resource/arena space with 0xABABABAB") \
879 \
880 notproduct(bool, ZapVMHandleArea, trueInDebug, \
881 "Zap freed VM handle space with 0xBCBCBCBC") \
882 \
883 develop(bool, ZapJNIHandleArea, trueInDebug, \
884 "Zap freed JNI handle space with 0xFEFEFEFE") \
885 \
886 notproduct(bool, ZapStackSegments, trueInDebug, \
887 "Zap allocated/freed stack segments with 0xFADFADED") \
888 \
889 develop(bool, ZapUnusedHeapArea, trueInDebug, \
890 "Zap unused heap space with 0xBAADBABE") \
891 \
892 develop(bool, TraceZapUnusedHeapArea, false, \
893 "Trace zapping of unused heap space") \
894 \
895 develop(bool, CheckZapUnusedHeapArea, false, \
896 "Check zapping of unused heap space") \
897 \
898 develop(bool, ZapFillerObjects, trueInDebug, \
899 "Zap filler objects with 0xDEAFBABE") \
900 \
901 develop(bool, PrintVMMessages, true, \
902 "Print VM messages on console") \
903 \
904 product(bool, PrintGCApplicationConcurrentTime, false, \
905 "Print the time the application has been running") \
906 \
907 product(bool, PrintGCApplicationStoppedTime, false, \
908 "Print the time the application has been stopped") \
909 \
910 diagnostic(bool, VerboseVerification, false, \
911 "Display detailed verification details") \
912 \
913 notproduct(uintx, ErrorHandlerTest, 0, \
914 "If > 0, provokes an error after VM initialization; the value " \
915 "determines which error to provoke. See test_error_handler() " \
916 "in debug.cpp.") \
917 \
918 develop(bool, Verbose, false, \
919 "Print additional debugging information from other modes") \
920 \
921 develop(bool, PrintMiscellaneous, false, \
922 "Print uncategorized debugging information (requires +Verbose)") \
923 \
924 develop(bool, WizardMode, false, \
925 "Print much more debugging information") \
926 \
927 product(bool, ShowMessageBoxOnError, false, \
928 "Keep process alive on VM fatal error") \
929 \
930 product(bool, CreateMinidumpOnCrash, false, \
931 "Create minidump on VM fatal error") \
932 \
933 product_pd(bool, UseOSErrorReporting, \
934 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
935 \
936 product(bool, SuppressFatalErrorMessage, false, \
937 "Report NO fatal error message (avoid deadlock)") \
938 \
939 product(ccstrlist, OnError, "", \
940 "Run user-defined commands on fatal error; see VMError.cpp " \
941 "for examples") \
942 \
943 product(ccstrlist, OnOutOfMemoryError, "", \
944 "Run user-defined commands on first java.lang.OutOfMemoryError") \
945 \
946 manageable(bool, HeapDumpBeforeFullGC, false, \
947 "Dump heap to file before any major stop-the-world GC") \
948 \
949 manageable(bool, HeapDumpAfterFullGC, false, \
950 "Dump heap to file after any major stop-the-world GC") \
951 \
952 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
953 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
954 \
955 manageable(ccstr, HeapDumpPath, NULL, \
956 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \
957 "directory) of the dump file (defaults to java_pid<pid>.hprof " \
958 "in the working directory)") \
959 \
960 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
961 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
962 "when the heap usage is larger than this") \
963 \
964 develop(uintx, HeapDumpSegmentSize, 1*G, \
965 "Approximate segment size when generating a segmented heap dump") \
966 \
967 develop(bool, BreakAtWarning, false, \
968 "Execute breakpoint upon encountering VM warning") \
969 \
970 develop(bool, TraceVMOperation, false, \
971 "Trace VM operations") \
972 \
973 develop(bool, UseFakeTimers, false, \
974 "Tell whether the VM should use system time or a fake timer") \
975 \
976 product(ccstr, NativeMemoryTracking, "off", \
977 "Native memory tracking options") \
978 \
979 diagnostic(bool, PrintNMTStatistics, false, \
980 "Print native memory tracking summary data if it is on") \
981 \
982 diagnostic(bool, LogCompilation, false, \
983 "Log compilation activity in detail to LogFile") \
984 \
985 product(bool, PrintCompilation, false, \
986 "Print compilations") \
987 \
988 diagnostic(bool, TraceNMethodInstalls, false, \
989 "Trace nmethod installation") \
990 \
991 diagnostic(intx, ScavengeRootsInCode, 2, \
992 "0: do not allow scavengable oops in the code cache; " \
993 "1: allow scavenging from the code cache; " \
994 "2: emit as many constants as the compiler can see") \
995 \
996 product(bool, AlwaysRestoreFPU, false, \
997 "Restore the FPU control word after every JNI call (expensive)") \
998 \
999 diagnostic(bool, PrintCompilation2, false, \
1000 "Print additional statistics per compilation") \
1001 \
1002 diagnostic(bool, PrintAdapterHandlers, false, \
1003 "Print code generated for i2c/c2i adapters") \
1004 \
1005 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \
1006 "Verify that i2c/c2i adapters are called properly") \
1007 \
1008 develop(bool, VerifyAdapterSharing, false, \
1009 "Verify that the code for shared adapters is the equivalent") \
1010 \
1011 diagnostic(bool, PrintAssembly, false, \
1012 "Print assembly code (using external disassembler.so)") \
1013 \
1014 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
1015 "Print options string passed to disassembler.so") \
1016 \
1017 diagnostic(bool, PrintNMethods, false, \
1018 "Print assembly code for nmethods when generated") \
1019 \
1020 diagnostic(bool, PrintNativeNMethods, false, \
1021 "Print assembly code for native nmethods when generated") \
1022 \
1023 develop(bool, PrintDebugInfo, false, \
1024 "Print debug information for all nmethods when generated") \
1025 \
1026 develop(bool, PrintRelocations, false, \
1027 "Print relocation information for all nmethods when generated") \
1028 \
1029 develop(bool, PrintDependencies, false, \
1030 "Print dependency information for all nmethods when generated") \
1031 \
1032 develop(bool, PrintExceptionHandlers, false, \
1033 "Print exception handler tables for all nmethods when generated") \
1034 \
1035 develop(bool, StressCompiledExceptionHandlers, false, \
1036 "Exercise compiled exception handlers") \
1037 \
1038 develop(bool, InterceptOSException, false, \
1039 "Start debugger when an implicit OS (e.g. NULL) " \
1040 "exception happens") \
1041 \
1042 product(bool, PrintCodeCache, false, \
1043 "Print the code cache memory usage when exiting") \
1044 \
1045 develop(bool, PrintCodeCache2, false, \
1046 "Print detailed usage information on the code cache when exiting")\
1047 \
1048 product(bool, PrintCodeCacheOnCompilation, false, \
1049 "Print the code cache memory usage each time a method is " \
1050 "compiled") \
1051 \
1052 diagnostic(bool, PrintStubCode, false, \
1053 "Print generated stub code") \
1054 \
1055 product(bool, StackTraceInThrowable, true, \
1056 "Collect backtrace in throwable when exception happens") \
1057 \
1058 product(bool, OmitStackTraceInFastThrow, true, \
1059 "Omit backtraces for some 'hot' exceptions in optimized code") \
1060 \
1061 product(bool, ProfilerPrintByteCodeStatistics, false, \
1062 "Print bytecode statistics when dumping profiler output") \
1063 \
1064 product(bool, ProfilerRecordPC, false, \
1065 "Collect ticks for each 16 byte interval of compiled code") \
1066 \
1067 product(bool, ProfileVM, false, \
1068 "Profile ticks that fall within VM (either in the VM Thread " \
1069 "or VM code called through stubs)") \
1070 \
1071 product(bool, ProfileIntervals, false, \
1072 "Print profiles for each interval (see ProfileIntervalsTicks)") \
1073 \
1074 notproduct(bool, ProfilerCheckIntervals, false, \
1075 "Collect and print information on spacing of profiler ticks") \
1076 \
1077 develop(bool, PrintJVMWarnings, false, \
1078 "Print warnings for unimplemented JVM functions") \
1079 \
1080 product(bool, PrintWarnings, true, \
1081 "Print JVM warnings to output stream") \
1082 \
1083 notproduct(uintx, WarnOnStalledSpinLock, 0, \
1084 "Print warnings for stalled SpinLocks") \
1085 \
1086 product(bool, RegisterFinalizersAtInit, true, \
1087 "Register finalizable objects at end of Object.<init> or " \
1088 "after allocation") \
1089 \
1090 develop(bool, RegisterReferences, true, \
1091 "Tell whether the VM should register soft/weak/final/phantom " \
1092 "references") \
1093 \
1094 develop(bool, IgnoreRewrites, false, \
1095 "Suppress rewrites of bytecodes in the oopmap generator. " \
1096 "This is unsafe!") \
1097 \
1098 develop(bool, PrintCodeCacheExtension, false, \
1099 "Print extension of code cache") \
1100 \
1101 develop(bool, UsePrivilegedStack, true, \
1102 "Enable the security JVM functions") \
1103 \
1104 develop(bool, ProtectionDomainVerification, true, \
1105 "Verify protection domain before resolution in system dictionary")\
1106 \
1107 product(bool, ClassUnloading, true, \
1108 "Do unloading of classes") \
1109 \
1110 product(bool, ClassUnloadingWithConcurrentMark, true, \
1111 "Do unloading of classes with a concurrent marking cycle") \
1112 \
1113 develop(bool, DisableStartThread, false, \
1114 "Disable starting of additional Java threads " \
1115 "(for debugging only)") \
1116 \
1117 develop(bool, MemProfiling, false, \
1118 "Write memory usage profiling to log file") \
1119 \
1120 notproduct(bool, PrintSystemDictionaryAtExit, false, \
1121 "Print the system dictionary at exit") \
1122 \
1123 experimental(intx, PredictedLoadedClassCount, 0, \
1124 "Experimental: Tune loaded class cache starting size") \
1125 \
1126 diagnostic(bool, UnsyncloadClass, false, \
1127 "Unstable: VM calls loadClass unsynchronized. Custom " \
1128 "class loader must call VM synchronized for findClass " \
1129 "and defineClass.") \
1130 \
1131 product(bool, AlwaysLockClassLoader, false, \
1132 "Require the VM to acquire the class loader lock before calling " \
1133 "loadClass() even for class loaders registering " \
1134 "as parallel capable") \
1135 \
1136 product(bool, AllowParallelDefineClass, false, \
1137 "Allow parallel defineClass requests for class loaders " \
1138 "registering as parallel capable") \
1139 \
1140 product(bool, MustCallLoadClassInternal, false, \
1141 "Call loadClassInternal() rather than loadClass()") \
1142 \
1143 product_pd(bool, DontYieldALot, \
1144 "Throw away obvious excess yield calls") \
1145 \
1146 product_pd(bool, ConvertSleepToYield, \
1147 "Convert sleep(0) to thread yield " \
1148 "(may be off for Solaris to improve GUI)") \
1149 \
1150 product(bool, ConvertYieldToSleep, false, \
1151 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
1152 "behavior") \
1153 \
1154 product(bool, UseBoundThreads, true, \
1155 "Bind user level threads to kernel threads (for Solaris only)") \
1156 \
1157 develop(bool, UseDetachedThreads, true, \
1158 "Use detached threads that are recycled upon termination " \
1159 "(for Solaris only)") \
1160 \
1161 product(bool, UseLWPSynchronization, true, \
1162 "Use LWP-based instead of libthread-based synchronization " \
1163 "(SPARC only)") \
1164 \
1165 experimental(ccstr, SyncKnobs, NULL, \
1166 "(Unstable) Various monitor synchronization tunables") \
1167 \
1168 experimental(intx, EmitSync, 0, \
1169 "(Unsafe, Unstable) " \
1170 "Control emission of inline sync fast-path code") \
1171 \
1172 product(intx, MonitorBound, 0, "Bound Monitor population") \
1173 \
1174 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
1175 \
1176 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \
1177 "Experimental Sync flags") \
1178 \
1179 experimental(intx, SyncVerbose, 0, "(Unstable)") \
1180 \
1181 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \
1182 \
1183 experimental(intx, hashCode, 5, \
1184 "(Unstable) select hashCode generation algorithm") \
1185 \
1186 experimental(intx, WorkAroundNPTLTimedWaitHang, 1, \
1187 "(Unstable, Linux-specific) " \
1188 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \
1189 \
1190 product(bool, FilterSpuriousWakeups, true, \
1191 "When true prevents OS-level spurious, or premature, wakeups " \
1192 "from Object.wait (Ignored for Windows)") \
1193 \
1194 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \
1195 \
1196 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \
1197 \
1198 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \
1199 \
1200 develop(bool, UsePthreads, false, \
1201 "Use pthread-based instead of libthread-based synchronization " \
1202 "(SPARC only)") \
1203 \
1204 product(bool, AdjustConcurrency, false, \
1205 "Call thr_setconcurrency at thread creation time to avoid " \
1206 "LWP starvation on MP systems (for Solaris Only)") \
1207 \
1208 product(bool, ReduceSignalUsage, false, \
1209 "Reduce the use of OS signals in Java and/or the VM") \
1210 \
1211 develop_pd(bool, ShareVtableStubs, \
1212 "Share vtable stubs (smaller code but worse branch prediction") \
1213 \
1214 develop(bool, LoadLineNumberTables, true, \
1215 "Tell whether the class file parser loads line number tables") \
1216 \
1217 develop(bool, LoadLocalVariableTables, true, \
1218 "Tell whether the class file parser loads local variable tables") \
1219 \
1220 develop(bool, LoadLocalVariableTypeTables, true, \
1221 "Tell whether the class file parser loads local variable type" \
1222 "tables") \
1223 \
1224 product(bool, AllowUserSignalHandlers, false, \
1225 "Do not complain if the application installs signal handlers " \
1226 "(Solaris & Linux only)") \
1227 \
1228 product(bool, UseSignalChaining, true, \
1229 "Use signal-chaining to invoke signal handlers installed " \
1230 "by the application (Solaris & Linux only)") \
1231 \
1232 product(bool, UseAltSigs, false, \
1233 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
1234 "internal signals (Solaris only)") \
1235 \
1236 product(bool, AllowJNIEnvProxy, false, \
1237 "Allow JNIEnv proxies for jdbx") \
1238 \
1239 product(bool, JNIDetachReleasesMonitors, true, \
1240 "JNI DetachCurrentThread releases monitors owned by thread") \
1241 \
1242 product(bool, RestoreMXCSROnJNICalls, false, \
1243 "Restore MXCSR when returning from JNI calls") \
1244 \
1245 product(bool, CheckJNICalls, false, \
1246 "Verify all arguments to JNI calls") \
1247 \
1248 product(bool, UseFastJNIAccessors, true, \
1249 "Use optimized versions of Get<Primitive>Field") \
1250 \
1251 product(intx, MaxJNILocalCapacity, 65536, \
1252 "Maximum allowable local JNI handle capacity to " \
1253 "EnsureLocalCapacity() and PushLocalFrame(), " \
1254 "where <= 0 is unlimited, default: 65536") \
1255 \
1256 product(bool, EagerXrunInit, false, \
1257 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1258 "but not all -Xrun libraries may support the state of the VM " \
1259 "at this time") \
1260 \
1261 product(bool, PreserveAllAnnotations, false, \
1262 "Preserve RuntimeInvisibleAnnotations as well " \
1263 "as RuntimeVisibleAnnotations") \
1264 \
1265 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1266 "Number of OutOfMemoryErrors preallocated with backtrace") \
1267 \
1268 product(bool, LazyBootClassLoader, true, \
1269 "Enable/disable lazy opening of boot class path entries") \
1270 \
1271 product(bool, UseXMMForArrayCopy, false, \
1272 "Use SSE2 MOVQ instruction for Arraycopy") \
1273 \
1274 product(intx, FieldsAllocationStyle, 1, \
1275 "0 - type based with oops first, 1 - with oops last, " \
1276 "2 - oops in super and sub classes are together") \
1277 \
1278 product(bool, CompactFields, true, \
1279 "Allocate nonstatic fields in gaps between previous fields") \
1280 \
1281 notproduct(bool, PrintFieldLayout, false, \
1282 "Print field layout for each class") \
1283 \
1284 product(intx, ContendedPaddingWidth, 128, \
1285 "How many bytes to pad the fields/classes marked @Contended with")\
1286 \
1287 product(bool, EnableContended, true, \
1288 "Enable @Contended annotation support") \
1289 \
1290 product(bool, RestrictContended, true, \
1291 "Restrict @Contended to trusted classes") \
1292 \
1293 product(bool, UseBiasedLocking, true, \
1294 "Enable biased locking in JVM") \
1295 \
1296 product(intx, BiasedLockingStartupDelay, 4000, \
1297 "Number of milliseconds to wait before enabling biased locking") \
1298 \
1299 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1300 "Print statistics of biased locking in JVM") \
1301 \
1302 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1303 "Threshold of number of revocations per type to try to " \
1304 "rebias all objects in the heap of that type") \
1305 \
1306 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1307 "Threshold of number of revocations per type to permanently " \
1308 "revoke biases of all objects in the heap of that type") \
1309 \
1310 product(intx, BiasedLockingDecayTime, 25000, \
1311 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1312 "type after previous bulk rebias") \
1313 \
1314 /* tracing */ \
1315 \
1316 notproduct(bool, TraceRuntimeCalls, false, \
1317 "Trace run-time calls") \
1318 \
1319 develop(bool, TraceJNICalls, false, \
1320 "Trace JNI calls") \
1321 \
1322 develop(bool, StressRewriter, false, \
1323 "Stress linktime bytecode rewriting") \
1324 \
1325 notproduct(bool, TraceJVMCalls, false, \
1326 "Trace JVM calls") \
1327 \
1328 product(ccstr, TraceJVMTI, NULL, \
1329 "Trace flags for JVMTI functions and events") \
1330 \
1331 /* This option can change an EMCP method into an obsolete method. */ \
1332 /* This can affect tests that except specific methods to be EMCP. */ \
1333 /* This option should be used with caution. */ \
1334 product(bool, StressLdcRewrite, false, \
1335 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1336 \
1337 product(intx, TraceRedefineClasses, 0, \
1338 "Trace level for JVMTI RedefineClasses") \
1339 \
1340 develop(bool, StressMethodComparator, false, \
1341 "Run the MethodComparator on all loaded methods") \
1342 \
1343 /* change to false by default sometime after Mustang */ \
1344 product(bool, VerifyMergedCPBytecodes, true, \
1345 "Verify bytecodes after RedefineClasses constant pool merging") \
1346 \
1347 develop(bool, TraceJNIHandleAllocation, false, \
1348 "Trace allocation/deallocation of JNI handle blocks") \
1349 \
1350 develop(bool, TraceThreadEvents, false, \
1351 "Trace all thread events") \
1352 \
1353 develop(bool, TraceBytecodes, false, \
1354 "Trace bytecode execution") \
1355 \
1356 develop(bool, TraceClassInitialization, false, \
1357 "Trace class initialization") \
1358 \
1359 develop(bool, TraceExceptions, false, \
1360 "Trace exceptions") \
1361 \
1362 develop(bool, TraceICs, false, \
1363 "Trace inline cache changes") \
1364 \
1365 notproduct(bool, TraceInvocationCounterOverflow, false, \
1366 "Trace method invocation counter overflow") \
1367 \
1368 develop(bool, TraceInlineCacheClearing, false, \
1369 "Trace clearing of inline caches in nmethods") \
1370 \
1371 develop(bool, TraceDependencies, false, \
1372 "Trace dependencies") \
1373 \
1374 develop(bool, VerifyDependencies, trueInDebug, \
1375 "Exercise and verify the compilation dependency mechanism") \
1376 \
1377 develop(bool, TraceNewOopMapGeneration, false, \
1378 "Trace OopMapGeneration") \
1379 \
1380 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1381 "Trace OopMapGeneration: print detailed cell states") \
1382 \
1383 develop(bool, TimeOopMap, false, \
1384 "Time calls to GenerateOopMap::compute_map() in sum") \
1385 \
1386 develop(bool, TimeOopMap2, false, \
1387 "Time calls to GenerateOopMap::compute_map() individually") \
1388 \
1389 develop(bool, TraceMonitorMismatch, false, \
1390 "Trace monitor matching failures during OopMapGeneration") \
1391 \
1392 develop(bool, TraceOopMapRewrites, false, \
1393 "Trace rewriting of method oops during oop map generation") \
1394 \
1395 develop(bool, TraceSafepoint, false, \
1396 "Trace safepoint operations") \
1397 \
1398 develop(bool, TraceICBuffer, false, \
1399 "Trace usage of IC buffer") \
1400 \
1401 develop(bool, TraceCompiledIC, false, \
1402 "Trace changes of compiled IC") \
1403 \
1404 notproduct(bool, TraceZapDeadLocals, false, \
1405 "Trace zapping dead locals") \
1406 \
1407 develop(bool, TraceStartupTime, false, \
1408 "Trace setup time") \
1409 \
1410 develop(bool, TraceProtectionDomainVerification, false, \
1411 "Trace protection domain verification") \
1412 \
1413 develop(bool, TraceClearedExceptions, false, \
1414 "Print when an exception is forcibly cleared") \
1415 \
1416 product(bool, TraceClassResolution, false, \
1417 "Trace all constant pool resolutions (for debugging)") \
1418 \
1419 product(bool, TraceBiasedLocking, false, \
1420 "Trace biased locking in JVM") \
1421 \
1422 product(bool, TraceMonitorInflation, false, \
1423 "Trace monitor inflation in JVM") \
1424 \
1425 /* gc */ \
1426 \
1427 product(bool, UseSerialGC, false, \
1428 "Use the Serial garbage collector") \
1429 \
1430 product(bool, UseG1GC, false, \
1431 "Use the Garbage-First garbage collector") \
1432 \
1433 product(bool, UseParallelGC, false, \
1434 "Use the Parallel Scavenge garbage collector") \
1435 \
1436 product(bool, UseParallelOldGC, false, \
1437 "Use the Parallel Old garbage collector") \
1438 \
1439 product(uintx, HeapMaximumCompactionInterval, 20, \
1440 "How often should we maximally compact the heap (not allowing " \
1441 "any dead space)") \
1442 \
1443 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1444 "The collection count for the first maximum compaction") \
1445 \
1446 product(bool, UseMaximumCompactionOnSystemGC, true, \
1447 "Use maximum compaction in the Parallel Old garbage collector " \
1448 "for a system GC") \
1449 \
1450 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1451 "The mean used by the parallel compact dead wood " \
1452 "limiter (a number between 0-100)") \
1453 \
1454 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1455 "The standard deviation used by the parallel compact dead wood " \
1456 "limiter (a number between 0-100)") \
1457 \
1458 product(uintx, ParallelGCThreads, 0, \
1459 "Number of parallel threads parallel gc will use") \
1460 \
1461 product(bool, UseDynamicNumberOfGCThreads, false, \
1462 "Dynamically choose the number of parallel threads " \
1463 "parallel gc will use") \
1464 \
1465 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
1466 "Force dynamic selection of the number of " \
1467 "parallel threads parallel gc will use to aid debugging") \
1468 \
1469 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \
1470 "Size of heap (bytes) per GC thread used in calculating the " \
1471 "number of GC threads") \
1472 \
1473 product(bool, TraceDynamicGCThreads, false, \
1474 "Trace the dynamic GC thread usage") \
1475 \
1476 develop(bool, ParallelOldGCSplitALot, false, \
1477 "Provoke splitting (copying data from a young gen space to " \
1478 "multiple destination spaces)") \
1479 \
1480 develop(uintx, ParallelOldGCSplitInterval, 3, \
1481 "How often to provoke splitting a young gen space") \
1482 \
1483 product(uintx, ConcGCThreads, 0, \
1484 "Number of threads concurrent gc will use") \
1485 \
1486 product(uintx, YoungPLABSize, 4096, \
1487 "Size of young gen promotion LAB's (in HeapWords)") \
1488 \
1489 product(uintx, OldPLABSize, 1024, \
1490 "Size of old gen promotion LAB's (in HeapWords)") \
1491 \
1492 product(uintx, GCTaskTimeStampEntries, 200, \
1493 "Number of time stamp entries per gc worker thread") \
1494 \
1495 product(bool, AlwaysTenure, false, \
1496 "Always tenure objects in eden (ParallelGC only)") \
1497 \
1498 product(bool, NeverTenure, false, \
1499 "Never tenure objects in eden, may tenure on overflow " \
1500 "(ParallelGC only)") \
1501 \
1502 product(bool, ScavengeBeforeFullGC, true, \
1503 "Scavenge youngest generation before each full GC.") \
1504 \
1505 develop(bool, ScavengeWithObjectsInToSpace, false, \
1506 "Allow scavenges to occur when to-space contains objects") \
1507 \
1508 product(bool, UseConcMarkSweepGC, false, \
1509 "Use Concurrent Mark-Sweep GC in the old generation") \
1510 \
1511 product(bool, ExplicitGCInvokesConcurrent, false, \
1512 "A System.gc() request invokes a concurrent collection; " \
1513 "(effective only when UseConcMarkSweepGC)") \
1514 \
1515 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1516 "A System.gc() request invokes a concurrent collection and " \
1517 "also unloads classes during such a concurrent gc cycle " \
1518 "(effective only when UseConcMarkSweepGC)") \
1519 \
1520 product(bool, GCLockerInvokesConcurrent, false, \
1521 "The exit of a JNI critical section necessitating a scavenge, " \
1522 "also kicks off a background concurrent collection") \
1523 \
1524 product(uintx, GCLockerEdenExpansionPercent, 5, \
1525 "How much the GC can expand the eden by while the GC locker " \
1526 "is active (as a percentage)") \
1527 \
1528 diagnostic(intx, GCLockerRetryAllocationCount, 2, \
1529 "Number of times to retry allocations when " \
1530 "blocked by the GC locker") \
1531 \
1532 develop(bool, UseCMSAdaptiveFreeLists, true, \
1533 "Use adaptive free lists in the CMS generation") \
1534 \
1535 develop(bool, UseAsyncConcMarkSweepGC, true, \
1536 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1537 \
1538 develop(bool, RotateCMSCollectionTypes, false, \
1539 "Rotate the CMS collections among concurrent and STW") \
1540 \
1541 product(bool, UseCMSBestFit, true, \
1542 "Use CMS best fit allocation strategy") \
1543 \
1544 product(bool, UseCMSCollectionPassing, true, \
1545 "Use passing of collection from background to foreground") \
1546 \
1547 product(bool, UseParNewGC, false, \
1548 "Use parallel threads in the new generation") \
1549 \
1550 product(bool, PrintTaskqueue, false, \
1551 "Print taskqueue statistics for parallel collectors") \
1552 \
1553 product(bool, PrintTerminationStats, false, \
1554 "Print termination statistics for parallel collectors") \
1555 \
1556 product(uintx, ParallelGCBufferWastePct, 10, \
1557 "Wasted fraction of parallel allocation buffer") \
1558 \
1559 diagnostic(bool, ParallelGCRetainPLAB, false, \
1560 "Retain parallel allocation buffers across scavenges; " \
1561 "it is disabled because this currently conflicts with " \
1562 "parallel card scanning under certain conditions.") \
1563 \
1564 product(uintx, TargetPLABWastePct, 10, \
1565 "Target wasted space in last buffer as percent of overall " \
1566 "allocation") \
1567 \
1568 product(uintx, PLABWeight, 75, \
1569 "Percentage (0-100) used to weight the current sample when " \
1570 "computing exponentially decaying average for ResizePLAB") \
1571 \
1572 product(bool, ResizePLAB, true, \
1573 "Dynamically resize (survivor space) promotion LAB's") \
1574 \
1575 product(bool, PrintPLAB, false, \
1576 "Print (survivor space) promotion LAB's sizing decisions") \
1577 \
1578 product(intx, ParGCArrayScanChunk, 50, \
1579 "Scan a subset of object array and push remainder, if array is " \
1580 "bigger than this") \
1581 \
1582 product(bool, ParGCUseLocalOverflow, false, \
1583 "Instead of a global overflow list, use local overflow stacks") \
1584 \
1585 product(bool, ParGCTrimOverflow, true, \
1586 "Eagerly trim the local overflow lists " \
1587 "(when ParGCUseLocalOverflow)") \
1588 \
1589 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1590 "Simulate work queue overflow in ParNew") \
1591 \
1592 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1593 "An `interval' counter that determines how frequently " \
1594 "we simulate overflow; a smaller number increases frequency") \
1595 \
1596 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1597 "The desired number of objects to claim from the overflow list") \
1598 \
1599 diagnostic(uintx, ParGCStridesPerThread, 2, \
1600 "The number of strides per worker thread that we divide up the " \
1601 "card table scanning work into") \
1602 \
1603 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
1604 "The number of cards in each chunk of the parallel chunks used " \
1605 "during card table scanning") \
1606 \
1607 product(uintx, CMSParPromoteBlocksToClaim, 16, \
1608 "Number of blocks to attempt to claim when refilling CMS LAB's " \
1609 "for parallel GC") \
1610 \
1611 product(uintx, OldPLABWeight, 50, \
1612 "Percentage (0-100) used to weight the current sample when " \
1613 "computing exponentially decaying average for resizing " \
1614 "CMSParPromoteBlocksToClaim") \
1615 \
1616 product(bool, ResizeOldPLAB, true, \
1617 "Dynamically resize (old gen) promotion LAB's") \
1618 \
1619 product(bool, PrintOldPLAB, false, \
1620 "Print (old gen) promotion LAB's sizing decisions") \
1621 \
1622 product(uintx, CMSOldPLABMin, 16, \
1623 "Minimum size of CMS gen promotion LAB caches per worker " \
1624 "per block size") \
1625 \
1626 product(uintx, CMSOldPLABMax, 1024, \
1627 "Maximum size of CMS gen promotion LAB caches per worker " \
1628 "per block size") \
1629 \
1630 product(uintx, CMSOldPLABNumRefills, 4, \
1631 "Nominal number of refills of CMS gen promotion LAB cache " \
1632 "per worker per block size") \
1633 \
1634 product(bool, CMSOldPLABResizeQuicker, false, \
1635 "React on-the-fly during a scavenge to a sudden " \
1636 "change in block demand rate") \
1637 \
1638 product(uintx, CMSOldPLABToleranceFactor, 4, \
1639 "The tolerance of the phase-change detector for on-the-fly " \
1640 "PLAB resizing during a scavenge") \
1641 \
1642 product(uintx, CMSOldPLABReactivityFactor, 2, \
1643 "The gain in the feedback loop for on-the-fly PLAB resizing " \
1644 "during a scavenge") \
1645 \
1646 product(bool, AlwaysPreTouch, false, \
1647 "Force all freshly committed pages to be pre-touched") \
1648 \
1649 product_pd(uintx, CMSYoungGenPerWorker, \
1650 "The maximum size of young gen chosen by default per GC worker " \
1651 "thread available") \
1652 \
1653 product(bool, CMSIncrementalMode, false, \
1654 "Whether CMS GC should operate in \"incremental\" mode") \
1655 \
1656 product(uintx, CMSIncrementalDutyCycle, 10, \
1657 "Percentage (0-100) of CMS incremental mode duty cycle. If " \
1658 "CMSIncrementalPacing is enabled, then this is just the initial " \
1659 "value.") \
1660 \
1661 product(bool, CMSIncrementalPacing, true, \
1662 "Whether the CMS incremental mode duty cycle should be " \
1663 "automatically adjusted") \
1664 \
1665 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1666 "Minimum percentage (0-100) of the CMS incremental duty cycle " \
1667 "used when CMSIncrementalPacing is enabled") \
1668 \
1669 product(uintx, CMSIncrementalSafetyFactor, 10, \
1670 "Percentage (0-100) used to add conservatism when computing the " \
1671 "duty cycle") \
1672 \
1673 product(uintx, CMSIncrementalOffset, 0, \
1674 "Percentage (0-100) by which the CMS incremental mode duty cycle "\
1675 "is shifted to the right within the period between young GCs") \
1676 \
1677 product(uintx, CMSExpAvgFactor, 50, \
1678 "Percentage (0-100) used to weight the current sample when " \
1679 "computing exponential averages for CMS statistics") \
1680 \
1681 product(uintx, CMS_FLSWeight, 75, \
1682 "Percentage (0-100) used to weight the current sample when " \
1683 "computing exponentially decaying averages for CMS FLS " \
1684 "statistics") \
1685 \
1686 product(uintx, CMS_FLSPadding, 1, \
1687 "The multiple of deviation from mean to use for buffering " \
1688 "against volatility in free list demand") \
1689 \
1690 product(uintx, FLSCoalescePolicy, 2, \
1691 "CMS: aggressiveness level for coalescing, increasing " \
1692 "from 0 to 4") \
1693 \
1694 product(bool, FLSAlwaysCoalesceLarge, false, \
1695 "CMS: larger free blocks are always available for coalescing") \
1696 \
1697 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1698 "CMS: the smaller the percentage the greater the coalescing " \
1699 "force") \
1700 \
1701 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1702 "CMS: the factor by which to inflate estimated demand of small " \
1703 "block sizes to prevent coalescing with an adjoining block") \
1704 \
1705 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1706 "CMS: the factor by which to inflate estimated demand of large " \
1707 "block sizes to prevent coalescing with an adjoining block") \
1708 \
1709 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1710 "CMS: the factor by which to inflate estimated demand of small " \
1711 "block sizes to prevent splitting to supply demand for smaller " \
1712 "blocks") \
1713 \
1714 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1715 "CMS: the factor by which to inflate estimated demand of large " \
1716 "block sizes to prevent splitting to supply demand for smaller " \
1717 "blocks") \
1718 \
1719 product(bool, CMSExtrapolateSweep, false, \
1720 "CMS: cushion for block demand during sweep") \
1721 \
1722 product(uintx, CMS_SweepWeight, 75, \
1723 "Percentage (0-100) used to weight the current sample when " \
1724 "computing exponentially decaying average for inter-sweep " \
1725 "duration") \
1726 \
1727 product(uintx, CMS_SweepPadding, 1, \
1728 "The multiple of deviation from mean to use for buffering " \
1729 "against volatility in inter-sweep duration") \
1730 \
1731 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1732 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1733 "duration exceeds this threshold in milliseconds") \
1734 \
1735 develop(bool, CMSTraceIncrementalMode, false, \
1736 "Trace CMS incremental mode") \
1737 \
1738 develop(bool, CMSTraceIncrementalPacing, false, \
1739 "Trace CMS incremental mode pacing computation") \
1740 \
1741 develop(bool, CMSTraceThreadState, false, \
1742 "Trace the CMS thread state (enable the trace_state() method)") \
1743 \
1744 product(bool, CMSClassUnloadingEnabled, true, \
1745 "Whether class unloading enabled when using CMS GC") \
1746 \
1747 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1748 "When CMS class unloading is enabled, the maximum CMS cycle " \
1749 "count for which classes may not be unloaded") \
1750 \
1751 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1752 "Compact when asked to collect CMS gen with " \
1753 "clear_all_soft_refs()") \
1754 \
1755 product(bool, UseCMSCompactAtFullCollection, true, \
1756 "Use Mark-Sweep-Compact algorithm at full collections") \
1757 \
1758 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1759 "Number of CMS full collection done before compaction if > 0") \
1760 \
1761 develop(intx, CMSDictionaryChoice, 0, \
1762 "Use BinaryTreeDictionary as default in the CMS generation") \
1763 \
1764 product(uintx, CMSIndexedFreeListReplenish, 4, \
1765 "Replenish an indexed free list with this number of chunks") \
1766 \
1767 product(bool, CMSReplenishIntermediate, true, \
1768 "Replenish all intermediate free-list caches") \
1769 \
1770 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1771 "When satisfying batched demand, split blocks from the " \
1772 "IndexedFreeList whose size is a multiple of requested size") \
1773 \
1774 product(bool, CMSLoopWarn, false, \
1775 "Warn in case of excessive CMS looping") \
1776 \
1777 develop(bool, CMSOverflowEarlyRestoration, false, \
1778 "Restore preserved marks early") \
1779 \
1780 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1781 "Size of marking stack") \
1782 \
1783 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1784 "Maximum size of marking stack") \
1785 \
1786 notproduct(bool, CMSMarkStackOverflowALot, false, \
1787 "Simulate frequent marking stack / work queue overflow") \
1788 \
1789 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1790 "An \"interval\" counter that determines how frequently " \
1791 "to simulate overflow; a smaller number increases frequency") \
1792 \
1793 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1794 "Maximum number of abortable preclean iterations, if > 0") \
1795 \
1796 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1797 "Maximum time in abortable preclean (in milliseconds)") \
1798 \
1799 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1800 "Nominal minimum work per abortable preclean iteration") \
1801 \
1802 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
1803 "Time that we sleep between iterations when not given " \
1804 "enough work per iteration") \
1805 \
1806 product(uintx, CMSRescanMultiple, 32, \
1807 "Size (in cards) of CMS parallel rescan task") \
1808 \
1809 product(uintx, CMSConcMarkMultiple, 32, \
1810 "Size (in cards) of CMS concurrent MT marking task") \
1811 \
1812 product(bool, CMSAbortSemantics, false, \
1813 "Whether abort-on-overflow semantics is implemented") \
1814 \
1815 product(bool, CMSParallelInitialMarkEnabled, true, \
1816 "Use the parallel initial mark.") \
1817 \
1818 product(bool, CMSParallelRemarkEnabled, true, \
1819 "Whether parallel remark enabled (only if ParNewGC)") \
1820 \
1821 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1822 "Whether parallel remark of survivor space " \
1823 "enabled (effective only if CMSParallelRemarkEnabled)") \
1824 \
1825 product(bool, CMSPLABRecordAlways, true, \
1826 "Always record survivor space PLAB boundaries (effective only " \
1827 "if CMSParallelSurvivorRemarkEnabled)") \
1828 \
1829 product(bool, CMSEdenChunksRecordAlways, true, \
1830 "Always record eden chunks used for the parallel initial mark " \
1831 "or remark of eden") \
1832 \
1833 product(bool, CMSPrintEdenSurvivorChunks, false, \
1834 "Print the eden and the survivor chunks used for the parallel " \
1835 "initial mark or remark of the eden/survivor spaces") \
1836 \
1837 product(bool, CMSConcurrentMTEnabled, true, \
1838 "Whether multi-threaded concurrent work enabled " \
1839 "(effective only if ParNewGC)") \
1840 \
1841 product(bool, CMSPrecleaningEnabled, true, \
1842 "Whether concurrent precleaning enabled") \
1843 \
1844 product(uintx, CMSPrecleanIter, 3, \
1845 "Maximum number of precleaning iteration passes") \
1846 \
1847 product(uintx, CMSPrecleanNumerator, 2, \
1848 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1849 "ratio") \
1850 \
1851 product(uintx, CMSPrecleanDenominator, 3, \
1852 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1853 "ratio") \
1854 \
1855 product(bool, CMSPrecleanRefLists1, true, \
1856 "Preclean ref lists during (initial) preclean phase") \
1857 \
1858 product(bool, CMSPrecleanRefLists2, false, \
1859 "Preclean ref lists during abortable preclean phase") \
1860 \
1861 product(bool, CMSPrecleanSurvivors1, false, \
1862 "Preclean survivors during (initial) preclean phase") \
1863 \
1864 product(bool, CMSPrecleanSurvivors2, true, \
1865 "Preclean survivors during abortable preclean phase") \
1866 \
1867 product(uintx, CMSPrecleanThreshold, 1000, \
1868 "Do not iterate again if number of dirty cards is less than this")\
1869 \
1870 product(bool, CMSCleanOnEnter, true, \
1871 "Clean-on-enter optimization for reducing number of dirty cards") \
1872 \
1873 product(uintx, CMSRemarkVerifyVariant, 1, \
1874 "Choose variant (1,2) of verification following remark") \
1875 \
1876 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1877 "If Eden size is below this, do not try to schedule remark") \
1878 \
1879 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1880 "The Eden occupancy percentage (0-100) at which " \
1881 "to try and schedule remark pause") \
1882 \
1883 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1884 "Start sampling eden top at least before young gen " \
1885 "occupancy reaches 1/<ratio> of the size at which " \
1886 "we plan to schedule remark") \
1887 \
1888 product(uintx, CMSSamplingGrain, 16*K, \
1889 "The minimum distance between eden samples for CMS (see above)") \
1890 \
1891 product(bool, CMSScavengeBeforeRemark, false, \
1892 "Attempt scavenge before the CMS remark step") \
1893 \
1894 develop(bool, CMSTraceSweeper, false, \
1895 "Trace some actions of the CMS sweeper") \
1896 \
1897 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1898 "Don't drain below this size per parallel worker/thief") \
1899 \
1900 manageable(intx, CMSWaitDuration, 2000, \
1901 "Time in milliseconds that CMS thread waits for young GC") \
1902 \
1903 develop(uintx, CMSCheckInterval, 1000, \
1904 "Interval in milliseconds that CMS thread checks if it " \
1905 "should start a collection cycle") \
1906 \
1907 product(bool, CMSYield, true, \
1908 "Yield between steps of CMS") \
1909 \
1910 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1911 "Bitmap operations should process at most this many bits " \
1912 "between yields") \
1913 \
1914 product(bool, CMSDumpAtPromotionFailure, false, \
1915 "Dump useful information about the state of the CMS old " \
1916 "generation upon a promotion failure") \
1917 \
1918 product(bool, CMSPrintChunksInDump, false, \
1919 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1920 "more detailed information about the free chunks") \
1921 \
1922 product(bool, CMSPrintObjectsInDump, false, \
1923 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1924 "more detailed information about the allocated objects") \
1925 \
1926 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1927 "Verify that all references across the FLS boundary " \
1928 "are to valid objects") \
1929 \
1930 diagnostic(bool, FLSVerifyLists, false, \
1931 "Do lots of (expensive) FreeListSpace verification") \
1932 \
1933 diagnostic(bool, FLSVerifyIndexTable, false, \
1934 "Do lots of (expensive) FLS index table verification") \
1935 \
1936 develop(bool, FLSVerifyDictionary, false, \
1937 "Do lots of (expensive) FLS dictionary verification") \
1938 \
1939 develop(bool, VerifyBlockOffsetArray, false, \
1940 "Do (expensive) block offset array verification") \
1941 \
1942 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
1943 "Maintain _unallocated_block in BlockOffsetArray " \
1944 "(currently applicable only to CMS collector)") \
1945 \
1946 develop(bool, TraceCMSState, false, \
1947 "Trace the state of the CMS collection") \
1948 \
1949 product(intx, RefDiscoveryPolicy, 0, \
1950 "Select type of reference discovery policy: " \
1951 "reference-based(0) or referent-based(1)") \
1952 \
1953 product(bool, ParallelRefProcEnabled, false, \
1954 "Enable parallel reference processing whenever possible") \
1955 \
1956 product(bool, ParallelRefProcBalancingEnabled, true, \
1957 "Enable balancing of reference processing queues") \
1958 \
1959 product(uintx, CMSTriggerRatio, 80, \
1960 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1961 "allocated before a CMS collection cycle commences") \
1962 \
1963 product(uintx, CMSBootstrapOccupancy, 50, \
1964 "Percentage CMS generation occupancy at which to " \
1965 "initiate CMS collection for bootstrapping collection stats") \
1966 \
1967 product(intx, CMSInitiatingOccupancyFraction, -1, \
1968 "Percentage CMS generation occupancy to start a CMS collection " \
1969 "cycle. A negative value means that CMSTriggerRatio is used") \
1970 \
1971 product(uintx, InitiatingHeapOccupancyPercent, 45, \
1972 "Percentage of the (entire) heap occupancy to start a " \
1973 "concurrent GC cycle. It is used by GCs that trigger a " \
1974 "concurrent GC cycle based on the occupancy of the entire heap, " \
1975 "not just one of the generations (e.g., G1). A value of 0 " \
1976 "denotes 'do constant GC cycles'.") \
1977 \
1978 manageable(intx, CMSTriggerInterval, -1, \
1979 "Commence a CMS collection cycle (at least) every so many " \
1980 "milliseconds (0 permanently, -1 disabled)") \
1981 \
1982 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1983 "Only use occupancy as a criterion for starting a CMS collection")\
1984 \
1985 product(uintx, CMSIsTooFullPercentage, 98, \
1986 "An absolute ceiling above which CMS will always consider the " \
1987 "unloading of classes when class unloading is enabled") \
1988 \
1989 develop(bool, CMSTestInFreeList, false, \
1990 "Check if the coalesced range is already in the " \
1991 "free lists as claimed") \
1992 \
1993 notproduct(bool, CMSVerifyReturnedBytes, false, \
1994 "Check that all the garbage collected was returned to the " \
1995 "free lists") \
1996 \
1997 notproduct(bool, ScavengeALot, false, \
1998 "Force scavenge at every Nth exit from the runtime system " \
1999 "(N=ScavengeALotInterval)") \
2000 \
2001 develop(bool, FullGCALot, false, \
2002 "Force full gc at every Nth exit from the runtime system " \
2003 "(N=FullGCALotInterval)") \
2004 \
2005 notproduct(bool, GCALotAtAllSafepoints, false, \
2006 "Enforce ScavengeALot/GCALot at all potential safepoints") \
2007 \
2008 product(bool, PrintPromotionFailure, false, \
2009 "Print additional diagnostic information following " \
2010 "promotion failure") \
2011 \
2012 notproduct(bool, PromotionFailureALot, false, \
2013 "Use promotion failure handling on every youngest generation " \
2014 "collection") \
2015 \
2016 develop(uintx, PromotionFailureALotCount, 1000, \
2017 "Number of promotion failures occurring at ParGCAllocBuffer " \
2018 "refill attempts (ParNew) or promotion attempts " \
2019 "(other young collectors)") \
2020 \
2021 develop(uintx, PromotionFailureALotInterval, 5, \
2022 "Total collections between promotion failures a lot") \
2023 \
2024 experimental(uintx, WorkStealingSleepMillis, 1, \
2025 "Sleep time when sleep is used for yields") \
2026 \
2027 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \
2028 "Number of yields before a sleep is done during work stealing") \
2029 \
2030 experimental(uintx, WorkStealingHardSpins, 4096, \
2031 "Number of iterations in a spin loop between checks on " \
2032 "time out of hard spin") \
2033 \
2034 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \
2035 "Ratio of hard spins to calls to yield") \
2036 \
2037 develop(uintx, ObjArrayMarkingStride, 512, \
2038 "Number of object array elements to push onto the marking stack " \
2039 "before pushing a continuation entry") \
2040 \
2041 develop(bool, MetadataAllocationFailALot, false, \
2042 "Fail metadata allocations at intervals controlled by " \
2043 "MetadataAllocationFailALotInterval") \
2044 \
2045 develop(uintx, MetadataAllocationFailALotInterval, 1000, \
2046 "Metadata allocation failure a lot interval") \
2047 \
2048 develop(bool, TraceMetadataChunkAllocation, false, \
2049 "Trace chunk metadata allocations") \
2050 \
2051 product(bool, TraceMetadataHumongousAllocation, false, \
2052 "Trace humongous metadata allocations") \
2053 \
2054 develop(bool, TraceMetavirtualspaceAllocation, false, \
2055 "Trace virtual space metadata allocations") \
2056 \
2057 notproduct(bool, ExecuteInternalVMTests, false, \
2058 "Enable execution of internal VM tests") \
2059 \
2060 notproduct(bool, VerboseInternalVMTests, false, \
2061 "Turn on logging for internal VM tests.") \
2062 \
2063 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
2064 \
2065 product_pd(bool, ResizeTLAB, \
2066 "Dynamically resize TLAB size for threads") \
2067 \
2068 product(bool, ZeroTLAB, false, \
2069 "Zero out the newly created TLAB") \
2070 \
2071 product(bool, FastTLABRefill, true, \
2072 "Use fast TLAB refill code") \
2073 \
2074 product(bool, PrintTLAB, false, \
2075 "Print various TLAB related information") \
2076 \
2077 product(bool, TLABStats, true, \
2078 "Provide more detailed and expensive TLAB statistics " \
2079 "(with PrintTLAB)") \
2080 \
2081 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \
2082 "Enable LowMemoryProtection")) \
2083 \
2084 product_pd(bool, NeverActAsServerClassMachine, \
2085 "Never act like a server-class machine") \
2086 \
2087 product(bool, AlwaysActAsServerClassMachine, false, \
2088 "Always act like a server-class machine") \
2089 \
2090 product_pd(uint64_t, MaxRAM, \
2091 "Real memory size (in bytes) used to set maximum heap size") \
2092 \
2093 product(uintx, ErgoHeapSizeLimit, 0, \
2094 "Maximum ergonomically set heap size (in bytes); zero means use " \
2095 "MaxRAM / MaxRAMFraction") \
2096 \
2097 product(uintx, MaxRAMFraction, 4, \
2098 "Maximum fraction (1/n) of real memory used for maximum heap " \
2099 "size") \
2100 \
2101 product(uintx, DefaultMaxRAMFraction, 4, \
2102 "Maximum fraction (1/n) of real memory used for maximum heap " \
2103 "size; deprecated: to be renamed to MaxRAMFraction") \
2104 \
2105 product(uintx, MinRAMFraction, 2, \
2106 "Minimum fraction (1/n) of real memory used for maximum heap " \
2107 "size on systems with small physical memory size") \
2108 \
2109 product(uintx, InitialRAMFraction, 64, \
2110 "Fraction (1/n) of real memory used for initial heap size") \
2111 \
2112 develop(uintx, MaxVirtMemFraction, 2, \
2113 "Maximum fraction (1/n) of virtual memory used for ergonomically "\
2114 "determining maximum heap size") \
2115 \
2116 product(bool, UseAutoGCSelectPolicy, false, \
2117 "Use automatic collection selection policy") \
2118 \
2119 product(uintx, AutoGCSelectPauseMillis, 5000, \
2120 "Automatic GC selection pause threshold in milliseconds") \
2121 \
2122 product(bool, UseAdaptiveSizePolicy, true, \
2123 "Use adaptive generation sizing policies") \
2124 \
2125 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
2126 "Use adaptive survivor sizing policies") \
2127 \
2128 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
2129 "Use adaptive young-old sizing policies at minor collections") \
2130 \
2131 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
2132 "Use adaptive young-old sizing policies at major collections") \
2133 \
2134 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
2135 "Include statistics from System.gc() for adaptive size policy") \
2136 \
2137 product(bool, UseAdaptiveGCBoundary, false, \
2138 "Allow young-old boundary to move") \
2139 \
2140 develop(bool, TraceAdaptiveGCBoundary, false, \
2141 "Trace young-old boundary moves") \
2142 \
2143 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
2144 "Resize the virtual spaces of the young or old generations") \
2145 \
2146 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
2147 "Policy for changing generation size for throughput goals") \
2148 \
2149 product(uintx, AdaptiveSizePausePolicy, 0, \
2150 "Policy for changing generation size for pause goals") \
2151 \
2152 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
2153 "Adjust tenured generation to achieve a minor pause goal") \
2154 \
2155 develop(bool, PSAdjustYoungGenForMajorPause, false, \
2156 "Adjust young generation to achieve a major pause goal") \
2157 \
2158 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
2159 "Number of steps where heuristics is used before data is used") \
2160 \
2161 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
2162 "Number of collections before the adaptive sizing is started") \
2163 \
2164 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
2165 "Collection interval for printing information; zero means never") \
2166 \
2167 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
2168 "Use adaptive minimum footprint as a goal") \
2169 \
2170 product(uintx, AdaptiveSizePolicyWeight, 10, \
2171 "Weight given to exponential resizing, between 0 and 100") \
2172 \
2173 product(uintx, AdaptiveTimeWeight, 25, \
2174 "Weight given to time in adaptive policy, between 0 and 100") \
2175 \
2176 product(uintx, PausePadding, 1, \
2177 "How much buffer to keep for pause time") \
2178 \
2179 product(uintx, PromotedPadding, 3, \
2180 "How much buffer to keep for promotion failure") \
2181 \
2182 product(uintx, SurvivorPadding, 3, \
2183 "How much buffer to keep for survivor overflow") \
2184 \
2185 product(uintx, ThresholdTolerance, 10, \
2186 "Allowed collection cost difference between generations") \
2187 \
2188 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
2189 "If collection costs are within margin, reduce both by full " \
2190 "delta") \
2191 \
2192 product(uintx, YoungGenerationSizeIncrement, 20, \
2193 "Adaptive size percentage change in young generation") \
2194 \
2195 product(uintx, YoungGenerationSizeSupplement, 80, \
2196 "Supplement to YoungedGenerationSizeIncrement used at startup") \
2197 \
2198 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
2199 "Decay factor to YoungedGenerationSizeSupplement") \
2200 \
2201 product(uintx, TenuredGenerationSizeIncrement, 20, \
2202 "Adaptive size percentage change in tenured generation") \
2203 \
2204 product(uintx, TenuredGenerationSizeSupplement, 80, \
2205 "Supplement to TenuredGenerationSizeIncrement used at startup") \
2206 \
2207 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
2208 "Decay factor to TenuredGenerationSizeIncrement") \
2209 \
2210 product(uintx, MaxGCPauseMillis, max_uintx, \
2211 "Adaptive size policy maximum GC pause time goal in millisecond, "\
2212 "or (G1 Only) the maximum GC time per MMU time slice") \
2213 \
2214 product(uintx, GCPauseIntervalMillis, 0, \
2215 "Time slice for MMU specification") \
2216 \
2217 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
2218 "Adaptive size policy maximum GC minor pause time goal " \
2219 "in millisecond") \
2220 \
2221 product(uintx, GCTimeRatio, 99, \
2222 "Adaptive size policy application time to GC time ratio") \
2223 \
2224 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
2225 "Adaptive size scale down factor for shrinking") \
2226 \
2227 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
2228 "Adaptive size decays the major cost for long major intervals") \
2229 \
2230 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
2231 "Time scale over which major costs decay") \
2232 \
2233 product(uintx, MinSurvivorRatio, 3, \
2234 "Minimum ratio of young generation/survivor space size") \
2235 \
2236 product(uintx, InitialSurvivorRatio, 8, \
2237 "Initial ratio of young generation/survivor space size") \
2238 \
2239 product(uintx, BaseFootPrintEstimate, 256*M, \
2240 "Estimate of footprint other than Java Heap") \
2241 \
2242 product(bool, UseGCOverheadLimit, true, \
2243 "Use policy to limit of proportion of time spent in GC " \
2244 "before an OutOfMemory error is thrown") \
2245 \
2246 product(uintx, GCTimeLimit, 98, \
2247 "Limit of the proportion of time spent in GC before " \
2248 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \
2249 \
2250 product(uintx, GCHeapFreeLimit, 2, \
2251 "Minimum percentage of free space after a full GC before an " \
2252 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
2253 \
2254 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
2255 "Number of consecutive collections before gc time limit fires") \
2256 \
2257 product(bool, PrintAdaptiveSizePolicy, false, \
2258 "Print information about AdaptiveSizePolicy") \
2259 \
2260 product(intx, PrefetchCopyIntervalInBytes, -1, \
2261 "How far ahead to prefetch destination area (<= 0 means off)") \
2262 \
2263 product(intx, PrefetchScanIntervalInBytes, -1, \
2264 "How far ahead to prefetch scan area (<= 0 means off)") \
2265 \
2266 product(intx, PrefetchFieldsAhead, -1, \
2267 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2268 \
2269 diagnostic(bool, VerifySilently, false, \
2270 "Do not print the verification progress") \
2271 \
2272 diagnostic(bool, VerifyDuringStartup, false, \
2273 "Verify memory system before executing any Java code " \
2274 "during VM initialization") \
2275 \
2276 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2277 "Verify system before exiting") \
2278 \
2279 diagnostic(bool, VerifyBeforeGC, false, \
2280 "Verify memory system before GC") \
2281 \
2282 diagnostic(bool, VerifyAfterGC, false, \
2283 "Verify memory system after GC") \
2284 \
2285 diagnostic(bool, VerifyDuringGC, false, \
2286 "Verify memory system during GC (between phases)") \
2287 \
2288 diagnostic(bool, GCParallelVerificationEnabled, true, \
2289 "Enable parallel memory system verification") \
2290 \
2291 diagnostic(bool, DeferInitialCardMark, false, \
2292 "When +ReduceInitialCardMarks, explicitly defer any that " \
2293 "may arise from new_pre_store_barrier") \
2294 \
2295 diagnostic(bool, VerifyRememberedSets, false, \
2296 "Verify GC remembered sets") \
2297 \
2298 diagnostic(bool, VerifyObjectStartArray, true, \
2299 "Verify GC object start array if verify before/after") \
2300 \
2301 product(bool, DisableExplicitGC, false, \
2302 "Ignore calls to System.gc()") \
2303 \
2304 notproduct(bool, CheckMemoryInitialization, false, \
2305 "Check memory initialization") \
2306 \
2307 diagnostic(bool, BindCMSThreadToCPU, false, \
2308 "Bind CMS Thread to CPU if possible") \
2309 \
2310 diagnostic(uintx, CPUForCMSThread, 0, \
2311 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2312 \
2313 product(bool, BindGCTaskThreadsToCPUs, false, \
2314 "Bind GCTaskThreads to CPUs if possible") \
2315 \
2316 product(bool, UseGCTaskAffinity, false, \
2317 "Use worker affinity when asking for GCTasks") \
2318 \
2319 product(uintx, ProcessDistributionStride, 4, \
2320 "Stride through processors when distributing processes") \
2321 \
2322 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2323 "Number of times the coordinator GC thread will sleep while " \
2324 "yielding before giving up and resuming GC") \
2325 \
2326 product(uintx, CMSYieldSleepCount, 0, \
2327 "Number of times a GC thread (minus the coordinator) " \
2328 "will sleep while yielding before giving up and resuming GC") \
2329 \
2330 /* gc tracing */ \
2331 manageable(bool, PrintGC, false, \
2332 "Print message at garbage collection") \
2333 \
2334 manageable(bool, PrintGCDetails, false, \
2335 "Print more details at garbage collection") \
2336 \
2337 manageable(bool, PrintGCDateStamps, false, \
2338 "Print date stamps at garbage collection") \
2339 \
2340 manageable(bool, PrintGCTimeStamps, false, \
2341 "Print timestamps at garbage collection") \
2342 \
2343 manageable(bool, PrintGCID, true, \
2344 "Print an identifier for each garbage collection") \
2345 \
2346 product(bool, PrintGCTaskTimeStamps, false, \
2347 "Print timestamps for individual gc worker thread tasks") \
2348 \
2349 develop(intx, ConcGCYieldTimeout, 0, \
2350 "If non-zero, assert that GC threads yield within this " \
2351 "number of milliseconds") \
2352 \
2353 notproduct(bool, TraceMarkSweep, false, \
2354 "Trace mark sweep") \
2355 \
2356 product(bool, PrintReferenceGC, false, \
2357 "Print times spent handling reference objects during GC " \
2358 "(enabled only when PrintGCDetails)") \
2359 \
2360 develop(bool, TraceReferenceGC, false, \
2361 "Trace handling of soft/weak/final/phantom references") \
2362 \
2363 develop(bool, TraceFinalizerRegistration, false, \
2364 "Trace registration of final references") \
2365 \
2366 notproduct(bool, TraceScavenge, false, \
2367 "Trace scavenge") \
2368 \
2369 product(bool, IgnoreEmptyClassPaths, false, \
2370 "Ignore empty path elements in -classpath") \
2371 \
2372 product(bool, TraceClassPaths, false, \
2373 "Trace processing of class paths") \
2374 \
2375 product_rw(bool, TraceClassLoading, false, \
2376 "Trace all classes loaded") \
2377 \
2378 product(bool, TraceClassLoadingPreorder, false, \
2379 "Trace all classes loaded in order referenced (not loaded)") \
2380 \
2381 product_rw(bool, TraceClassUnloading, false, \
2382 "Trace unloading of classes") \
2383 \
2384 product_rw(bool, TraceLoaderConstraints, false, \
2385 "Trace loader constraints") \
2386 \
2387 develop(bool, TraceClassLoaderData, false, \
2388 "Trace class loader loader_data lifetime") \
2389 \
2390 product(uintx, InitialBootClassLoaderMetaspaceSize, \
2391 NOT_LP64(2200*K) LP64_ONLY(4*M), \
2392 "Initial size of the boot class loader data metaspace") \
2393 \
2394 product(bool, TraceYoungGenTime, false, \
2395 "Trace accumulated time for young collection") \
2396 \
2397 product(bool, TraceOldGenTime, false, \
2398 "Trace accumulated time for old collection") \
2399 \
2400 product(bool, PrintTenuringDistribution, false, \
2401 "Print tenuring age information") \
2402 \
2403 product_rw(bool, PrintHeapAtGC, false, \
2404 "Print heap layout before and after each GC") \
2405 \
2406 product_rw(bool, PrintHeapAtGCExtended, false, \
2407 "Print extended information about the layout of the heap " \
2408 "when -XX:+PrintHeapAtGC is set") \
2409 \
2410 product(bool, PrintHeapAtSIGBREAK, true, \
2411 "Print heap layout in response to SIGBREAK") \
2412 \
2413 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
2414 "Print a class histogram before any major stop-world GC") \
2415 \
2416 manageable(bool, PrintClassHistogramAfterFullGC, false, \
2417 "Print a class histogram after any major stop-world GC") \
2418 \
2419 manageable(bool, PrintClassHistogram, false, \
2420 "Print a histogram of class instances") \
2421 \
2422 develop(bool, TraceWorkGang, false, \
2423 "Trace activities of work gangs") \
2424 \
2425 product(bool, TraceParallelOldGCTasks, false, \
2426 "Trace multithreaded GC activity") \
2427 \
2428 develop(bool, TraceBlockOffsetTable, false, \
2429 "Print BlockOffsetTable maps") \
2430 \
2431 develop(bool, TraceCardTableModRefBS, false, \
2432 "Print CardTableModRefBS maps") \
2433 \
2434 develop(bool, TraceGCTaskManager, false, \
2435 "Trace actions of the GC task manager") \
2436 \
2437 develop(bool, TraceGCTaskQueue, false, \
2438 "Trace actions of the GC task queues") \
2439 \
2440 diagnostic(bool, TraceGCTaskThread, false, \
2441 "Trace actions of the GC task threads") \
2442 \
2443 product(bool, PrintParallelOldGCPhaseTimes, false, \
2444 "Print the time taken by each phase in ParallelOldGC " \
2445 "(PrintGCDetails must also be enabled)") \
2446 \
2447 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2448 "Trace marking phase in ParallelOldGC") \
2449 \
2450 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2451 "Trace summary phase in ParallelOldGC") \
2452 \
2453 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2454 "Trace compaction phase in ParallelOldGC") \
2455 \
2456 develop(bool, TraceParallelOldGCDensePrefix, false, \
2457 "Trace dense prefix computation for ParallelOldGC") \
2458 \
2459 develop(bool, IgnoreLibthreadGPFault, false, \
2460 "Suppress workaround for libthread GP fault") \
2461 \
2462 product(bool, PrintJNIGCStalls, false, \
2463 "Print diagnostic message when GC is stalled " \
2464 "by JNI critical section") \
2465 \
2466 experimental(double, ObjectCountCutOffPercent, 0.5, \
2467 "The percentage of the used heap that the instances of a class " \
2468 "must occupy for the class to generate a trace event") \
2469 \
2470 /* GC log rotation setting */ \
2471 \
2472 product(bool, UseGCLogFileRotation, false, \
2473 "Rotate gclog files (for long running applications). It requires "\
2474 "-Xloggc:<filename>") \
2475 \
2476 product(uintx, NumberOfGCLogFiles, 0, \
2477 "Number of gclog files in rotation " \
2478 "(default: 0, no rotation)") \
2479 \
2480 product(uintx, GCLogFileSize, 8*K, \
2481 "GC log file size, requires UseGCLogFileRotation. " \
2482 "Set to 0 to only trigger rotation via jcmd") \
2483 \
2484 /* JVMTI heap profiling */ \
2485 \
2486 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2487 "Trace JVMTI object tagging calls") \
2488 \
2489 diagnostic(bool, VerifyBeforeIteration, false, \
2490 "Verify memory system before JVMTI iteration") \
2491 \
2492 /* compiler interface */ \
2493 \
2494 develop(bool, CIPrintCompilerName, false, \
2495 "when CIPrint is active, print the name of the active compiler") \
2496 \
2497 diagnostic(bool, CIPrintCompileQueue, false, \
2498 "display the contents of the compile queue whenever a " \
2499 "compilation is enqueued") \
2500 \
2501 develop(bool, CIPrintRequests, false, \
2502 "display every request for compilation") \
2503 \
2504 product(bool, CITime, false, \
2505 "collect timing information for compilation") \
2506 \
2507 develop(bool, CITimeVerbose, false, \
2508 "be more verbose in compilation timings") \
2509 \
2510 develop(bool, CITimeEach, false, \
2511 "display timing information after each successful compilation") \
2512 \
2513 develop(bool, CICountOSR, false, \
2514 "use a separate counter when assigning ids to osr compilations") \
2515 \
2516 develop(bool, CICompileNatives, true, \
2517 "compile native methods if supported by the compiler") \
2518 \
2519 develop_pd(bool, CICompileOSR, \
2520 "compile on stack replacement methods if supported by the " \
2521 "compiler") \
2522 \
2523 develop(bool, CIPrintMethodCodes, false, \
2524 "print method bytecodes of the compiled code") \
2525 \
2526 develop(bool, CIPrintTypeFlow, false, \
2527 "print the results of ciTypeFlow analysis") \
2528 \
2529 develop(bool, CITraceTypeFlow, false, \
2530 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2531 \
2532 develop(intx, OSROnlyBCI, -1, \
2533 "OSR only at this bci. Negative values mean exclude that bci") \
2534 \
2535 /* compiler */ \
2536 \
2537 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2538 "Number of compiler threads to run") \
2539 \
2540 product(intx, CompilationPolicyChoice, 0, \
2541 "which compilation policy (0/1)") \
2542 \
2543 develop(bool, UseStackBanging, true, \
2544 "use stack banging for stack overflow checks (required for " \
2545 "proper StackOverflow handling; disable only to measure cost " \
2546 "of stackbanging)") \
2547 \
2548 develop(bool, UseStrictFP, true, \
2549 "use strict fp if modifier strictfp is set") \
2550 \
2551 develop(bool, GenerateSynchronizationCode, true, \
2552 "generate locking/unlocking code for synchronized methods and " \
2553 "monitors") \
2554 \
2555 develop(bool, GenerateCompilerNullChecks, true, \
2556 "Generate explicit null checks for loads/stores/calls") \
2557 \
2558 develop(bool, GenerateRangeChecks, true, \
2559 "Generate range checks for array accesses") \
2560 \
2561 develop_pd(bool, ImplicitNullChecks, \
2562 "Generate code for implicit null checks") \
2563 \
2564 product_pd(bool, TrapBasedNullChecks, \
2565 "Generate code for null checks that uses a cmp and trap " \
2566 "instruction raising SIGTRAP. This is only used if an access to" \
2567 "null (+offset) will not raise a SIGSEGV, i.e.," \
2568 "ImplicitNullChecks don't work (PPC64).") \
2569 \
2570 product(bool, PrintSafepointStatistics, false, \
2571 "Print statistics about safepoint synchronization") \
2572 \
2573 product(intx, PrintSafepointStatisticsCount, 300, \
2574 "Total number of safepoint statistics collected " \
2575 "before printing them out") \
2576 \
2577 product(intx, PrintSafepointStatisticsTimeout, -1, \
2578 "Print safepoint statistics only when safepoint takes " \
2579 "more than PrintSafepointSatisticsTimeout in millis") \
2580 \
2581 product(bool, TraceSafepointCleanupTime, false, \
2582 "Print the break down of clean up tasks performed during " \
2583 "safepoint") \
2584 \
2585 product(bool, Inline, true, \
2586 "Enable inlining") \
2587 \
2588 product(bool, ClipInlining, true, \
2589 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \
2590 \
2591 develop(bool, UseCHA, true, \
2592 "Enable CHA") \
2593 \
2594 product(bool, UseTypeProfile, true, \
2595 "Check interpreter profile for historically monomorphic calls") \
2596 \
2597 diagnostic(bool, PrintInlining, false, \
2598 "Print inlining optimizations") \
2599 \
2600 product(bool, UsePopCountInstruction, false, \
2601 "Use population count instruction") \
2602 \
2603 develop(bool, EagerInitialization, false, \
2604 "Eagerly initialize classes if possible") \
2605 \
2606 develop(bool, TraceMethodReplacement, false, \
2607 "Print when methods are replaced do to recompilation") \
2608 \
2609 develop(bool, PrintMethodFlushing, false, \
2610 "Print the nmethods being flushed") \
2611 \
2612 diagnostic(bool, PrintMethodFlushingStatistics, false, \
2613 "print statistics about method flushing") \
2614 \
2615 diagnostic(intx, HotMethodDetectionLimit, 100000, \
2616 "Number of compiled code invocations after which " \
2617 "the method is considered as hot by the flusher") \
2618 \
2619 diagnostic(intx, MinPassesBeforeFlush, 10, \
2620 "Minimum number of sweeper passes before an nmethod " \
2621 "can be flushed") \
2622 \
2623 product(bool, UseCodeAging, true, \
2624 "Insert counter to detect warm methods") \
2625 \
2626 diagnostic(bool, StressCodeAging, false, \
2627 "Start with counters compiled in") \
2628 \
2629 develop(bool, UseRelocIndex, false, \
2630 "Use an index to speed random access to relocations") \
2631 \
2632 develop(bool, StressCodeBuffers, false, \
2633 "Exercise code buffer expansion and other rare state changes") \
2634 \
2635 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2636 "Generate extra debugging information for non-safepoints in " \
2637 "nmethods") \
2638 \
2639 product(bool, PrintVMOptions, false, \
2640 "Print flags that appeared on the command line") \
2641 \
2642 product(bool, IgnoreUnrecognizedVMOptions, false, \
2643 "Ignore unrecognized VM options") \
2644 \
2645 product(bool, PrintCommandLineFlags, false, \
2646 "Print flags specified on command line or set by ergonomics") \
2647 \
2648 product(bool, PrintFlagsInitial, false, \
2649 "Print all VM flags before argument processing and exit VM") \
2650 \
2651 product(bool, PrintFlagsFinal, false, \
2652 "Print all VM flags after argument and ergonomic processing") \
2653 \
2654 notproduct(bool, PrintFlagsWithComments, false, \
2655 "Print all VM flags with default values and descriptions and " \
2656 "exit") \
2657 \
2658 diagnostic(bool, SerializeVMOutput, true, \
2659 "Use a mutex to serialize output to tty and LogFile") \
2660 \
2661 diagnostic(bool, DisplayVMOutput, true, \
2662 "Display all VM output on the tty, independently of LogVMOutput") \
2663 \
2664 diagnostic(bool, LogVMOutput, false, \
2665 "Save VM output to LogFile") \
2666 \
2667 diagnostic(ccstr, LogFile, NULL, \
2668 "If LogVMOutput or LogCompilation is on, save VM output to " \
2669 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
2670 \
2671 product(ccstr, ErrorFile, NULL, \
2672 "If an error occurs, save the error data to this file " \
2673 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2674 \
2675 product(bool, DisplayVMOutputToStderr, false, \
2676 "If DisplayVMOutput is true, display all VM output to stderr") \
2677 \
2678 product(bool, DisplayVMOutputToStdout, false, \
2679 "If DisplayVMOutput is true, display all VM output to stdout") \
2680 \
2681 product(bool, UseHeavyMonitors, false, \
2682 "use heavyweight instead of lightweight Java monitors") \
2683 \
2684 product(bool, PrintStringTableStatistics, false, \
2685 "print statistics about the StringTable and SymbolTable") \
2686 \
2687 diagnostic(bool, VerifyStringTableAtExit, false, \
2688 "verify StringTable contents at exit") \
2689 \
2690 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2691 "print histogram of the symbol table") \
2692 \
2693 notproduct(bool, ExitVMOnVerifyError, false, \
2694 "standard exit from VM if bytecode verify error " \
2695 "(only in debug mode)") \
2696 \
2697 notproduct(ccstr, AbortVMOnException, NULL, \
2698 "Call fatal if this exception is thrown. Example: " \
2699 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2700 \
2701 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \
2702 "Call fatal if the exception pointed by AbortVMOnException " \
2703 "has this message") \
2704 \
2705 develop(bool, DebugVtables, false, \
2706 "add debugging code to vtable dispatch") \
2707 \
2708 develop(bool, PrintVtables, false, \
2709 "print vtables when printing klass") \
2710 \
2711 notproduct(bool, PrintVtableStats, false, \
2712 "print vtables stats at end of run") \
2713 \
2714 develop(bool, TraceCreateZombies, false, \
2715 "trace creation of zombie nmethods") \
2716 \
2717 notproduct(bool, IgnoreLockingAssertions, false, \
2718 "disable locking assertions (for speed)") \
2719 \
2720 product(bool, RangeCheckElimination, true, \
2721 "Eliminate range checks") \
2722 \
2723 develop_pd(bool, UncommonNullCast, \
2724 "track occurrences of null in casts; adjust compiler tactics") \
2725 \
2726 develop(bool, TypeProfileCasts, true, \
2727 "treat casts like calls for purposes of type profiling") \
2728 \
2729 develop(bool, DelayCompilationDuringStartup, true, \
2730 "Delay invoking the compiler until main application class is " \
2731 "loaded") \
2732 \
2733 develop(bool, CompileTheWorld, false, \
2734 "Compile all methods in all classes in bootstrap class path " \
2735 "(stress test)") \
2736 \
2737 develop(bool, CompileTheWorldPreloadClasses, true, \
2738 "Preload all classes used by a class before start loading") \
2739 \
2740 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2741 "Force a safepoint every n compiles so sweeper can keep up") \
2742 \
2743 develop(bool, FillDelaySlots, true, \
2744 "Fill delay slots (on SPARC only)") \
2745 \
2746 develop(bool, TimeLivenessAnalysis, false, \
2747 "Time computation of bytecode liveness analysis") \
2748 \
2749 develop(bool, TraceLivenessGen, false, \
2750 "Trace the generation of liveness analysis information") \
2751 \
2752 notproduct(bool, TraceLivenessQuery, false, \
2753 "Trace queries of liveness analysis information") \
2754 \
2755 notproduct(bool, CollectIndexSetStatistics, false, \
2756 "Collect information about IndexSets") \
2757 \
2758 develop(bool, UseLoopSafepoints, true, \
2759 "Generate Safepoint nodes in every loop") \
2760 \
2761 develop(intx, FastAllocateSizeLimit, 128*K, \
2762 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2763 "Inline allocations larger than this in doublewords must go slow")\
2764 \
2765 product(bool, AggressiveOpts, false, \
2766 "Enable aggressive optimizations - see arguments.cpp") \
2767 \
2768 product_pd(uintx, TypeProfileLevel, \
2769 "=XYZ, with Z: Type profiling of arguments at call; " \
2770 "Y: Type profiling of return value at call; " \
2771 "X: Type profiling of parameters to methods; " \
2772 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \
2773 \
2774 product(intx, TypeProfileArgsLimit, 2, \
2775 "max number of call arguments to consider for type profiling") \
2776 \
2777 product(intx, TypeProfileParmsLimit, 2, \
2778 "max number of incoming parameters to consider for type profiling"\
2779 ", -1 for all") \
2780 \
2781 /* statistics */ \
2782 develop(bool, CountCompiledCalls, false, \
2783 "Count method invocations") \
2784 \
2785 notproduct(bool, CountRuntimeCalls, false, \
2786 "Count VM runtime calls") \
2787 \
2788 develop(bool, CountJNICalls, false, \
2789 "Count jni method invocations") \
2790 \
2791 notproduct(bool, CountJVMCalls, false, \
2792 "Count jvm method invocations") \
2793 \
2794 notproduct(bool, CountRemovableExceptions, false, \
2795 "Count exceptions that could be replaced by branches due to " \
2796 "inlining") \
2797 \
2798 notproduct(bool, ICMissHistogram, false, \
2799 "Produce histogram of IC misses") \
2800 \
2801 notproduct(bool, PrintClassStatistics, false, \
2802 "Print class statistics at end of run") \
2803 \
2804 notproduct(bool, PrintMethodStatistics, false, \
2805 "Print method statistics at end of run") \
2806 \
2807 /* interpreter */ \
2808 develop(bool, ClearInterpreterLocals, false, \
2809 "Always clear local variables of interpreter activations upon " \
2810 "entry") \
2811 \
2812 product_pd(bool, RewriteBytecodes, \
2813 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2814 \
2815 product_pd(bool, RewriteFrequentPairs, \
2816 "Rewrite frequently used bytecode pairs into a single bytecode") \
2817 \
2818 diagnostic(bool, PrintInterpreter, false, \
2819 "Print the generated interpreter code") \
2820 \
2821 product(bool, UseInterpreter, true, \
2822 "Use interpreter for non-compiled methods") \
2823 \
2824 develop(bool, UseFastSignatureHandlers, true, \
2825 "Use fast signature handlers for native calls") \
2826 \
2827 product(bool, UseLoopCounter, true, \
2828 "Increment invocation counter on backward branch") \
2829 \
2830 product_pd(bool, UseOnStackReplacement, \
2831 "Use on stack replacement, calls runtime if invoc. counter " \
2832 "overflows in loop") \
2833 \
2834 notproduct(bool, TraceOnStackReplacement, false, \
2835 "Trace on stack replacement") \
2836 \
2837 product_pd(bool, PreferInterpreterNativeStubs, \
2838 "Use always interpreter stubs for native methods invoked via " \
2839 "interpreter") \
2840 \
2841 develop(bool, CountBytecodes, false, \
2842 "Count number of bytecodes executed") \
2843 \
2844 develop(bool, PrintBytecodeHistogram, false, \
2845 "Print histogram of the executed bytecodes") \
2846 \
2847 develop(bool, PrintBytecodePairHistogram, false, \
2848 "Print histogram of the executed bytecode pairs") \
2849 \
2850 diagnostic(bool, PrintSignatureHandlers, false, \
2851 "Print code generated for native method signature handlers") \
2852 \
2853 develop(bool, VerifyOops, false, \
2854 "Do plausibility checks for oops") \
2855 \
2856 develop(bool, CheckUnhandledOops, false, \
2857 "Check for unhandled oops in VM code") \
2858 \
2859 develop(bool, VerifyJNIFields, trueInDebug, \
2860 "Verify jfieldIDs for instance fields") \
2861 \
2862 notproduct(bool, VerifyJNIEnvThread, false, \
2863 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2864 "from JNI") \
2865 \
2866 develop(bool, VerifyFPU, false, \
2867 "Verify FPU state (check for NaN's, etc.)") \
2868 \
2869 develop(bool, VerifyThread, false, \
2870 "Watch the thread register for corruption (SPARC only)") \
2871 \
2872 develop(bool, VerifyActivationFrameSize, false, \
2873 "Verify that activation frame didn't become smaller than its " \
2874 "minimal size") \
2875 \
2876 develop(bool, TraceFrequencyInlining, false, \
2877 "Trace frequency based inlining") \
2878 \
2879 develop_pd(bool, InlineIntrinsics, \
2880 "Inline intrinsics that can be statically resolved") \
2881 \
2882 product_pd(bool, ProfileInterpreter, \
2883 "Profile at the bytecode level during interpretation") \
2884 \
2885 develop(bool, TraceProfileInterpreter, false, \
2886 "Trace profiling at the bytecode level during interpretation. " \
2887 "This outputs the profiling information collected to improve " \
2888 "jit compilation.") \
2889 \
2890 develop_pd(bool, ProfileTraps, \
2891 "Profile deoptimization traps at the bytecode level") \
2892 \
2893 product(intx, ProfileMaturityPercentage, 20, \
2894 "number of method invocations/branches (expressed as % of " \
2895 "CompileThreshold) before using the method's profile") \
2896 \
2897 diagnostic(bool, PrintMethodData, false, \
2898 "Print the results of +ProfileInterpreter at end of run") \
2899 \
2900 develop(bool, VerifyDataPointer, trueInDebug, \
2901 "Verify the method data pointer during interpreter profiling") \
2902 \
2903 develop(bool, VerifyCompiledCode, false, \
2904 "Include miscellaneous runtime verifications in nmethod code; " \
2905 "default off because it disturbs nmethod size heuristics") \
2906 \
2907 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2908 "Manually make GC thread crash then dump java stack trace; " \
2909 "Test only") \
2910 \
2911 /* compilation */ \
2912 product(bool, UseCompiler, true, \
2913 "Use Just-In-Time compilation") \
2914 \
2915 develop(bool, TraceCompilationPolicy, false, \
2916 "Trace compilation policy") \
2917 \
2918 develop(bool, TimeCompilationPolicy, false, \
2919 "Time the compilation policy") \
2920 \
2921 product(bool, UseCounterDecay, true, \
2922 "Adjust recompilation counters") \
2923 \
2924 develop(intx, CounterHalfLifeTime, 30, \
2925 "Half-life time of invocation counters (in seconds)") \
2926 \
2927 develop(intx, CounterDecayMinIntervalLength, 500, \
2928 "The minimum interval (in milliseconds) between invocation of " \
2929 "CounterDecay") \
2930 \
2931 product(bool, AlwaysCompileLoopMethods, false, \
2932 "When using recompilation, never interpret methods " \
2933 "containing loops") \
2934 \
2935 product(bool, DontCompileHugeMethods, true, \
2936 "Do not compile methods > HugeMethodLimit") \
2937 \
2938 /* Bytecode escape analysis estimation. */ \
2939 product(bool, EstimateArgEscape, true, \
2940 "Analyze bytecodes to estimate escape state of arguments") \
2941 \
2942 product(intx, BCEATraceLevel, 0, \
2943 "How much tracing to do of bytecode escape analysis estimates") \
2944 \
2945 product(intx, MaxBCEAEstimateLevel, 5, \
2946 "Maximum number of nested calls that are analyzed by BC EA") \
2947 \
2948 product(intx, MaxBCEAEstimateSize, 150, \
2949 "Maximum bytecode size of a method to be analyzed by BC EA") \
2950 \
2951 product(intx, AllocatePrefetchStyle, 1, \
2952 "0 = no prefetch, " \
2953 "1 = prefetch instructions for each allocation, " \
2954 "2 = use TLAB watermark to gate allocation prefetch, " \
2955 "3 = use BIS instruction on Sparc for allocation prefetch") \
2956 \
2957 product(intx, AllocatePrefetchDistance, -1, \
2958 "Distance to prefetch ahead of allocation pointer") \
2959 \
2960 product(intx, AllocatePrefetchLines, 3, \
2961 "Number of lines to prefetch ahead of array allocation pointer") \
2962 \
2963 product(intx, AllocateInstancePrefetchLines, 1, \
2964 "Number of lines to prefetch ahead of instance allocation " \
2965 "pointer") \
2966 \
2967 product(intx, AllocatePrefetchStepSize, 16, \
2968 "Step size in bytes of sequential prefetch instructions") \
2969 \
2970 product(intx, AllocatePrefetchInstr, 0, \
2971 "Prefetch instruction to prefetch ahead of allocation pointer") \
2972 \
2973 /* deoptimization */ \
2974 develop(bool, TraceDeoptimization, false, \
2975 "Trace deoptimization") \
2976 \
2977 develop(bool, DebugDeoptimization, false, \
2978 "Tracing various information while debugging deoptimization") \
2979 \
2980 product(intx, SelfDestructTimer, 0, \
2981 "Will cause VM to terminate after a given time (in minutes) " \
2982 "(0 means off)") \
2983 \
2984 product(intx, MaxJavaStackTraceDepth, 1024, \
2985 "The maximum number of lines in the stack trace for Java " \
2986 "exceptions (0 means all)") \
2987 \
2988 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
2989 "Guarantee a safepoint (at least) every so many milliseconds " \
2990 "(0 means none)")) \
2991 \
2992 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \
2993 "Guarantee a safepoint (at least) every so many milliseconds " \
2994 "(0 means none)")) \
2995 \
2996 product(intx, SafepointTimeoutDelay, 10000, \
2997 "Delay in milliseconds for option SafepointTimeout") \
2998 \
2999 product(intx, NmethodSweepFraction, 16, \
3000 "Number of invocations of sweeper to cover all nmethods") \
3001 \
3002 product(intx, NmethodSweepCheckInterval, 5, \
3003 "Compilers wake up every n seconds to possibly sweep nmethods") \
3004 \
3005 product(intx, NmethodSweepActivity, 10, \
3006 "Removes cold nmethods from code cache if > 0. Higher values " \
3007 "result in more aggressive sweeping") \
3008 \
3009 notproduct(bool, LogSweeper, false, \
3010 "Keep a ring buffer of sweeper activity") \
3011 \
3012 notproduct(intx, SweeperLogEntries, 1024, \
3013 "Number of records in the ring buffer of sweeper activity") \
3014 \
3015 notproduct(intx, MemProfilingInterval, 500, \
3016 "Time between each invocation of the MemProfiler") \
3017 \
3018 develop(intx, MallocCatchPtr, -1, \
3019 "Hit breakpoint when mallocing/freeing this pointer") \
3020 \
3021 notproduct(intx, AssertRepeat, 1, \
3022 "number of times to evaluate expression in assert " \
3023 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
3024 \
3025 notproduct(ccstrlist, SuppressErrorAt, "", \
3026 "List of assertions (file:line) to muzzle") \
3027 \
3028 notproduct(uintx, HandleAllocationLimit, 1024, \
3029 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
3030 "is used") \
3031 \
3032 develop(uintx, TotalHandleAllocationLimit, 1024, \
3033 "Threshold for total handle allocation when " \
3034 "+TraceHandleAllocation is used") \
3035 \
3036 develop(intx, StackPrintLimit, 100, \
3037 "number of stack frames to print in VM-level stack dump") \
3038 \
3039 notproduct(intx, MaxElementPrintSize, 256, \
3040 "maximum number of elements to print") \
3041 \
3042 notproduct(intx, MaxSubklassPrintSize, 4, \
3043 "maximum number of subklasses to print when printing klass") \
3044 \
3045 product(intx, MaxInlineLevel, 9, \
3046 "maximum number of nested calls that are inlined") \
3047 \
3048 product(intx, MaxRecursiveInlineLevel, 1, \
3049 "maximum number of nested recursive calls that are inlined") \
3050 \
3051 develop(intx, MaxForceInlineLevel, 100, \
3052 "maximum number of nested calls that are forced for inlining " \
3053 "(using CompilerOracle or marked w/ @ForceInline)") \
3054 \
3055 product_pd(intx, InlineSmallCode, \
3056 "Only inline already compiled methods if their code size is " \
3057 "less than this") \
3058 \
3059 product(intx, MaxInlineSize, 35, \
3060 "The maximum bytecode size of a method to be inlined") \
3061 \
3062 product_pd(intx, FreqInlineSize, \
3063 "The maximum bytecode size of a frequent method to be inlined") \
3064 \
3065 product(intx, MaxTrivialSize, 6, \
3066 "The maximum bytecode size of a trivial method to be inlined") \
3067 \
3068 product(intx, MinInliningThreshold, 250, \
3069 "The minimum invocation count a method needs to have to be " \
3070 "inlined") \
3071 \
3072 develop(intx, MethodHistogramCutoff, 100, \
3073 "The cutoff value for method invocation histogram (+CountCalls)") \
3074 \
3075 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
3076 "Number of interpreted methods to show in profile") \
3077 \
3078 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
3079 "Number of compiled methods to show in profile") \
3080 \
3081 develop(intx, ProfilerNumberOfStubMethods, 25, \
3082 "Number of stub methods to show in profile") \
3083 \
3084 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
3085 "Number of runtime stub nodes to show in profile") \
3086 \
3087 product(intx, ProfileIntervalsTicks, 100, \
3088 "Number of ticks between printing of interval profile " \
3089 "(+ProfileIntervals)") \
3090 \
3091 notproduct(intx, ScavengeALotInterval, 1, \
3092 "Interval between which scavenge will occur with +ScavengeALot") \
3093 \
3094 notproduct(intx, FullGCALotInterval, 1, \
3095 "Interval between which full gc will occur with +FullGCALot") \
3096 \
3097 notproduct(intx, FullGCALotStart, 0, \
3098 "For which invocation to start FullGCAlot") \
3099 \
3100 notproduct(intx, FullGCALotDummies, 32*K, \
3101 "Dummy object allocated with +FullGCALot, forcing all objects " \
3102 "to move") \
3103 \
3104 develop(intx, DontYieldALotInterval, 10, \
3105 "Interval between which yields will be dropped (milliseconds)") \
3106 \
3107 develop(intx, MinSleepInterval, 1, \
3108 "Minimum sleep() interval (milliseconds) when " \
3109 "ConvertSleepToYield is off (used for Solaris)") \
3110 \
3111 develop(intx, ProfilerPCTickThreshold, 15, \
3112 "Number of ticks in a PC buckets to be a hotspot") \
3113 \
3114 notproduct(intx, DeoptimizeALotInterval, 5, \
3115 "Number of exits until DeoptimizeALot kicks in") \
3116 \
3117 notproduct(intx, ZombieALotInterval, 5, \
3118 "Number of exits until ZombieALot kicks in") \
3119 \
3120 diagnostic(intx, MallocVerifyInterval, 0, \
3121 "If non-zero, verify C heap after every N calls to " \
3122 "malloc/realloc/free") \
3123 \
3124 diagnostic(intx, MallocVerifyStart, 0, \
3125 "If non-zero, start verifying C heap after Nth call to " \
3126 "malloc/realloc/free") \
3127 \
3128 diagnostic(uintx, MallocMaxTestWords, 0, \
3129 "If non-zero, maximum number of words that malloc/realloc can " \
3130 "allocate (for testing only)") \
3131 \
3132 product(intx, TypeProfileWidth, 2, \
3133 "Number of receiver types to record in call/cast profile") \
3134 \
3135 develop(intx, BciProfileWidth, 2, \
3136 "Number of return bci's to record in ret profile") \
3137 \
3138 product(intx, PerMethodRecompilationCutoff, 400, \
3139 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3140 \
3141 product(intx, PerBytecodeRecompilationCutoff, 200, \
3142 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
3143 \
3144 product(intx, PerMethodTrapLimit, 100, \
3145 "Limit on traps (of one kind) in a method (includes inlines)") \
3146 \
3147 experimental(intx, PerMethodSpecTrapLimit, 5000, \
3148 "Limit on speculative traps (of one kind) in a method (includes inlines)") \
3149 \
3150 product(intx, PerBytecodeTrapLimit, 4, \
3151 "Limit on traps (of one kind) at a particular BCI") \
3152 \
3153 experimental(intx, SpecTrapLimitExtraEntries, 3, \
3154 "Extra method data trap entries for speculation") \
3155 \
3156 develop(intx, InlineFrequencyRatio, 20, \
3157 "Ratio of call site execution to caller method invocation") \
3158 \
3159 develop_pd(intx, InlineFrequencyCount, \
3160 "Count of call site execution necessary to trigger frequent " \
3161 "inlining") \
3162 \
3163 develop(intx, InlineThrowCount, 50, \
3164 "Force inlining of interpreted methods that throw this often") \
3165 \
3166 develop(intx, InlineThrowMaxSize, 200, \
3167 "Force inlining of throwing methods smaller than this") \
3168 \
3169 develop(intx, ProfilerNodeSize, 1024, \
3170 "Size in K to allocate for the Profile Nodes of each thread") \
3171 \
3172 product_pd(intx, PreInflateSpin, \
3173 "Number of times to spin wait before inflation") \
3174 \
3175 /* gc parameters */ \
3176 product(uintx, InitialHeapSize, 0, \
3177 "Initial heap size (in bytes); zero means use ergonomics") \
3178 \
3179 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \
3180 "Maximum heap size (in bytes)") \
3181 \
3182 product(uintx, OldSize, ScaleForWordSize(4*M), \
3183 "Initial tenured generation size (in bytes)") \
3184 \
3185 product(uintx, NewSize, ScaleForWordSize(1*M), \
3186 "Initial new generation size (in bytes)") \
3187 \
3188 product(uintx, MaxNewSize, max_uintx, \
3189 "Maximum new generation size (in bytes), max_uintx means set " \
3190 "ergonomically") \
3191 \
3192 product(uintx, PretenureSizeThreshold, 0, \
3193 "Maximum size in bytes of objects allocated in DefNew " \
3194 "generation; zero means no maximum") \
3195 \
3196 product(uintx, TLABSize, 0, \
3197 "Starting TLAB size (in bytes); zero means set ergonomically") \
3198 \
3199 product(uintx, MinTLABSize, 2*K, \
3200 "Minimum allowed TLAB size (in bytes)") \
3201 \
3202 product(uintx, TLABAllocationWeight, 35, \
3203 "Allocation averaging weight") \
3204 \
3205 product(uintx, TLABWasteTargetPercent, 1, \
3206 "Percentage of Eden that can be wasted") \
3207 \
3208 product(uintx, TLABRefillWasteFraction, 64, \
3209 "Maximum TLAB waste at a refill (internal fragmentation)") \
3210 \
3211 product(uintx, TLABWasteIncrement, 4, \
3212 "Increment allowed waste at slow allocation") \
3213 \
3214 product(uintx, SurvivorRatio, 8, \
3215 "Ratio of eden/survivor space size") \
3216 \
3217 product(uintx, NewRatio, 2, \
3218 "Ratio of old/new generation sizes") \
3219 \
3220 product_pd(uintx, NewSizeThreadIncrease, \
3221 "Additional size added to desired new generation size per " \
3222 "non-daemon thread (in bytes)") \
3223 \
3224 product_pd(uintx, MetaspaceSize, \
3225 "Initial size of Metaspaces (in bytes)") \
3226 \
3227 product(uintx, MaxMetaspaceSize, max_uintx, \
3228 "Maximum size of Metaspaces (in bytes)") \
3229 \
3230 product(uintx, CompressedClassSpaceSize, 1*G, \
3231 "Maximum size of class area in Metaspace when compressed " \
3232 "class pointers are used") \
3233 \
3234 manageable(uintx, MinHeapFreeRatio, 40, \
3235 "The minimum percentage of heap free after GC to avoid expansion."\
3236 " For most GCs this applies to the old generation. In G1 and" \
3237 " ParallelGC it applies to the whole heap.") \
3238 \
3239 manageable(uintx, MaxHeapFreeRatio, 70, \
3240 "The maximum percentage of heap free after GC to avoid shrinking."\
3241 " For most GCs this applies to the old generation. In G1 and" \
3242 " ParallelGC it applies to the whole heap.") \
3243 \
3244 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
3245 "Number of milliseconds per MB of free space in the heap") \
3246 \
3247 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
3248 "The minimum change in heap space due to GC (in bytes)") \
3249 \
3250 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \
3251 "The minimum expansion of Metaspace (in bytes)") \
3252 \
3253 product(uintx, MinMetaspaceFreeRatio, 40, \
3254 "The minimum percentage of Metaspace free after GC to avoid " \
3255 "expansion") \
3256 \
3257 product(uintx, MaxMetaspaceFreeRatio, 70, \
3258 "The maximum percentage of Metaspace free after GC to avoid " \
3259 "shrinking") \
3260 \
3261 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \
3262 "The maximum expansion of Metaspace without full GC (in bytes)") \
3263 \
3264 product(uintx, QueuedAllocationWarningCount, 0, \
3265 "Number of times an allocation that queues behind a GC " \
3266 "will retry before printing a warning") \
3267 \
3268 diagnostic(uintx, VerifyGCStartAt, 0, \
3269 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3270 \
3271 diagnostic(intx, VerifyGCLevel, 0, \
3272 "Generation level at which to start +VerifyBefore/AfterGC") \
3273 \
3274 product(uintx, MaxTenuringThreshold, 15, \
3275 "Maximum value for tenuring threshold") \
3276 \
3277 product(uintx, InitialTenuringThreshold, 7, \
3278 "Initial value for tenuring threshold") \
3279 \
3280 product(uintx, TargetSurvivorRatio, 50, \
3281 "Desired percentage of survivor space used after scavenge") \
3282 \
3283 product(uintx, MarkSweepDeadRatio, 5, \
3284 "Percentage (0-100) of the old gen allowed as dead wood. " \
3285 "Serial mark sweep treats this as both the minimum and maximum " \
3286 "value. " \
3287 "CMS uses this value only if it falls back to mark sweep. " \
3288 "Par compact uses a variable scale based on the density of the " \
3289 "generation and treats this as the maximum value when the heap " \
3290 "is either completely full or completely empty. Par compact " \
3291 "also has a smaller default value; see arguments.cpp.") \
3292 \
3293 product(uintx, MarkSweepAlwaysCompactCount, 4, \
3294 "How often should we fully compact the heap (ignoring the dead " \
3295 "space parameters)") \
3296 \
3297 product(intx, PrintCMSStatistics, 0, \
3298 "Statistics for CMS") \
3299 \
3300 product(bool, PrintCMSInitiationStatistics, false, \
3301 "Statistics for initiating a CMS collection") \
3302 \
3303 product(intx, PrintFLSStatistics, 0, \
3304 "Statistics for CMS' FreeListSpace") \
3305 \
3306 product(intx, PrintFLSCensus, 0, \
3307 "Census for CMS' FreeListSpace") \
3308 \
3309 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3310 "Delay between expansion and allocation (in milliseconds)") \
3311 \
3312 develop(uintx, GCWorkerDelayMillis, 0, \
3313 "Delay in scheduling GC workers (in milliseconds)") \
3314 \
3315 product(intx, DeferThrSuspendLoopCount, 4000, \
3316 "(Unstable) Number of times to iterate in safepoint loop " \
3317 "before blocking VM threads ") \
3318 \
3319 product(intx, DeferPollingPageLoopCount, -1, \
3320 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3321 "before changing safepoint polling page to RO ") \
3322 \
3323 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3324 \
3325 product(bool, PSChunkLargeArrays, true, \
3326 "Process large arrays in chunks") \
3327 \
3328 product(uintx, GCDrainStackTargetSize, 64, \
3329 "Number of entries we will try to leave on the stack " \
3330 "during parallel gc") \
3331 \
3332 /* stack parameters */ \
3333 product_pd(intx, StackYellowPages, \
3334 "Number of yellow zone (recoverable overflows) pages") \
3335 \
3336 product_pd(intx, StackRedPages, \
3337 "Number of red zone (unrecoverable overflows) pages") \
3338 \
3339 product_pd(intx, StackShadowPages, \
3340 "Number of shadow zone (for overflow checking) pages " \
3341 "this should exceed the depth of the VM and native call stack") \
3342 \
3343 product_pd(intx, ThreadStackSize, \
3344 "Thread Stack Size (in Kbytes)") \
3345 \
3346 product_pd(intx, VMThreadStackSize, \
3347 "Non-Java Thread Stack Size (in Kbytes)") \
3348 \
3349 product_pd(intx, CompilerThreadStackSize, \
3350 "Compiler Thread Stack Size (in Kbytes)") \
3351 \
3352 develop_pd(uintx, JVMInvokeMethodSlack, \
3353 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3354 \
3355 product(uintx, ThreadSafetyMargin, 50*M, \
3356 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
3357 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
3358 "disable this feature") \
3359 \
3360 /* code cache parameters */ \
3361 /* ppc64/tiered compilation has large code-entry alignment. */ \
3362 develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)),\
3363 "Code cache segment size (in bytes) - smallest unit of " \
3364 "allocation") \
3365 \
3366 develop_pd(intx, CodeEntryAlignment, \
3367 "Code entry alignment for generated code (in bytes)") \
3368 \
3369 product_pd(intx, OptoLoopAlignment, \
3370 "Align inner loops to zero relative to this modulus") \
3371 \
3372 product_pd(uintx, InitialCodeCacheSize, \
3373 "Initial code cache size (in bytes)") \
3374 \
3375 develop_pd(uintx, CodeCacheMinimumUseSpace, \
3376 "Minimum code cache size (in bytes) required to start VM.") \
3377 \
3378 product(bool, SegmentedCodeCache, false, \
3379 "Use a segmented code cache") \
3380 \
3381 product_pd(uintx, ReservedCodeCacheSize, \
3382 "Reserved code cache size (in bytes) - maximum code cache size") \
3383 \
3384 product_pd(uintx, NonProfiledCodeHeapSize, \
3385 "Size of code heap with non-profiled methods (in bytes)") \
3386 \
3387 product_pd(uintx, ProfiledCodeHeapSize, \
3388 "Size of code heap with profiled methods (in bytes)") \
3389 \
3390 product_pd(uintx, NonNMethodCodeHeapSize, \
3391 "Size of code heap with non-nmethods (in bytes)") \
3392 \
3393 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
3394 "When less than X space left, we stop compiling") \
3395 \
3396 product_pd(uintx, CodeCacheExpansionSize, \
3397 "Code cache expansion size (in bytes)") \
3398 \
3399 develop_pd(uintx, CodeCacheMinBlockLength, \
3400 "Minimum number of segments in a code cache block") \
3401 \
3402 notproduct(bool, ExitOnFullCodeCache, false, \
3403 "Exit the VM if we fill the code cache") \
3404 \
3405 product(bool, UseCodeCacheFlushing, true, \
3406 "Remove cold/old nmethods from the code cache") \
3407 \
3408 /* interpreter debugging */ \
3409 develop(intx, BinarySwitchThreshold, 5, \
3410 "Minimal number of lookupswitch entries for rewriting to binary " \
3411 "switch") \
3412 \
3413 develop(intx, StopInterpreterAt, 0, \
3414 "Stop interpreter execution at specified bytecode number") \
3415 \
3416 develop(intx, TraceBytecodesAt, 0, \
3417 "Trace bytecodes starting with specified bytecode number") \
3418 \
3419 /* compiler interface */ \
3420 develop(intx, CIStart, 0, \
3421 "The id of the first compilation to permit") \
3422 \
3423 develop(intx, CIStop, max_jint, \
3424 "The id of the last compilation to permit") \
3425 \
3426 develop(intx, CIStartOSR, 0, \
3427 "The id of the first osr compilation to permit " \
3428 "(CICountOSR must be on)") \
3429 \
3430 develop(intx, CIStopOSR, max_jint, \
3431 "The id of the last osr compilation to permit " \
3432 "(CICountOSR must be on)") \
3433 \
3434 develop(intx, CIBreakAtOSR, -1, \
3435 "The id of osr compilation to break at") \
3436 \
3437 develop(intx, CIBreakAt, -1, \
3438 "The id of compilation to break at") \
3439 \
3440 product(ccstrlist, CompileOnly, "", \
3441 "List of methods (pkg/class.name) to restrict compilation to") \
3442 \
3443 product(ccstr, CompileCommandFile, NULL, \
3444 "Read compiler commands from this file [.hotspot_compiler]") \
3445 \
3446 product(ccstrlist, CompileCommand, "", \
3447 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3448 \
3449 develop(bool, ReplayCompiles, false, \
3450 "Enable replay of compilations from ReplayDataFile") \
3451 \
3452 product(ccstr, ReplayDataFile, NULL, \
3453 "File containing compilation replay information" \
3454 "[default: ./replay_pid%p.log] (%p replaced with pid)") \
3455 \
3456 product(ccstr, InlineDataFile, NULL, \
3457 "File containing inlining replay information" \
3458 "[default: ./inline_pid%p.log] (%p replaced with pid)") \
3459 \
3460 develop(intx, ReplaySuppressInitializers, 2, \
3461 "Control handling of class initialization during replay: " \
3462 "0 - don't do anything special; " \
3463 "1 - treat all class initializers as empty; " \
3464 "2 - treat class initializers for application classes as empty; " \
3465 "3 - allow all class initializers to run during bootstrap but " \
3466 " pretend they are empty after starting replay") \
3467 \
3468 develop(bool, ReplayIgnoreInitErrors, false, \
3469 "Ignore exceptions thrown during initialization for replay") \
3470 \
3471 product(bool, DumpReplayDataOnError, true, \
3472 "Record replay data for crashing compiler threads") \
3473 \
3474 product(bool, CICompilerCountPerCPU, false, \
3475 "1 compiler thread for log(N CPUs)") \
3476 \
3477 develop(intx, CIFireOOMAt, -1, \
3478 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3479 "(non-negative value throws OOM after this many CI accesses " \
3480 "in each compile)") \
3481 notproduct(intx, CICrashAt, -1, \
3482 "id of compilation to trigger assert in compiler thread for " \
3483 "the purpose of testing, e.g. generation of replay data") \
3484 notproduct(bool, CIObjectFactoryVerify, false, \
3485 "enable potentially expensive verification in ciObjectFactory") \
3486 \
3487 /* Priorities */ \
3488 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3489 \
3490 product(intx, ThreadPriorityPolicy, 0, \
3491 "0 : Normal. "\
3492 " VM chooses priorities that are appropriate for normal "\
3493 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3494 " to normal native priority. Java priorities below " \
3495 " NORM_PRIORITY map to lower native priority values. On "\
3496 " Windows applications are allowed to use higher native "\
3497 " priorities. However, with ThreadPriorityPolicy=0, VM will "\
3498 " not use the highest possible native priority, "\
3499 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\
3500 " system threads. On Linux thread priorities are ignored "\
3501 " because the OS does not support static priority in "\
3502 " SCHED_OTHER scheduling class which is the only choice for "\
3503 " non-root, non-realtime applications. "\
3504 "1 : Aggressive. "\
3505 " Java thread priorities map over to the entire range of "\
3506 " native thread priorities. Higher Java thread priorities map "\
3507 " to higher native thread priorities. This policy should be "\
3508 " used with care, as sometimes it can cause performance "\
3509 " degradation in the application and/or the entire system. On "\
3510 " Linux this policy requires root privilege.") \
3511 \
3512 product(bool, ThreadPriorityVerbose, false, \
3513 "Print priority changes") \
3514 \
3515 product(intx, DefaultThreadPriority, -1, \
3516 "The native priority at which threads run if not elsewhere " \
3517 "specified (-1 means no change)") \
3518 \
3519 product(intx, CompilerThreadPriority, -1, \
3520 "The native priority at which compiler threads should run " \
3521 "(-1 means no change)") \
3522 \
3523 product(intx, VMThreadPriority, -1, \
3524 "The native priority at which the VM thread should run " \
3525 "(-1 means no change)") \
3526 \
3527 product(bool, CompilerThreadHintNoPreempt, true, \
3528 "(Solaris only) Give compiler threads an extra quanta") \
3529 \
3530 product(bool, VMThreadHintNoPreempt, false, \
3531 "(Solaris only) Give VM thread an extra quanta") \
3532 \
3533 product(intx, JavaPriority1_To_OSPriority, -1, \
3534 "Map Java priorities to OS priorities") \
3535 \
3536 product(intx, JavaPriority2_To_OSPriority, -1, \
3537 "Map Java priorities to OS priorities") \
3538 \
3539 product(intx, JavaPriority3_To_OSPriority, -1, \
3540 "Map Java priorities to OS priorities") \
3541 \
3542 product(intx, JavaPriority4_To_OSPriority, -1, \
3543 "Map Java priorities to OS priorities") \
3544 \
3545 product(intx, JavaPriority5_To_OSPriority, -1, \
3546 "Map Java priorities to OS priorities") \
3547 \
3548 product(intx, JavaPriority6_To_OSPriority, -1, \
3549 "Map Java priorities to OS priorities") \
3550 \
3551 product(intx, JavaPriority7_To_OSPriority, -1, \
3552 "Map Java priorities to OS priorities") \
3553 \
3554 product(intx, JavaPriority8_To_OSPriority, -1, \
3555 "Map Java priorities to OS priorities") \
3556 \
3557 product(intx, JavaPriority9_To_OSPriority, -1, \
3558 "Map Java priorities to OS priorities") \
3559 \
3560 product(intx, JavaPriority10_To_OSPriority,-1, \
3561 "Map Java priorities to OS priorities") \
3562 \
3563 experimental(bool, UseCriticalJavaThreadPriority, false, \
3564 "Java thread priority 10 maps to critical scheduling priority") \
3565 \
3566 experimental(bool, UseCriticalCompilerThreadPriority, false, \
3567 "Compiler thread(s) run at critical scheduling priority") \
3568 \
3569 experimental(bool, UseCriticalCMSThreadPriority, false, \
3570 "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3571 \
3572 /* compiler debugging */ \
3573 notproduct(intx, CompileTheWorldStartAt, 1, \
3574 "First class to consider when using +CompileTheWorld") \
3575 \
3576 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3577 "Last class to consider when using +CompileTheWorld") \
3578 \
3579 develop(intx, NewCodeParameter, 0, \
3580 "Testing Only: Create a dedicated integer parameter before " \
3581 "putback") \
3582 \
3583 /* new oopmap storage allocation */ \
3584 develop(intx, MinOopMapAllocation, 8, \
3585 "Minimum number of OopMap entries in an OopMapSet") \
3586 \
3587 /* Background Compilation */ \
3588 develop(intx, LongCompileThreshold, 50, \
3589 "Used with +TraceLongCompiles") \
3590 \
3591 product(intx, StarvationMonitorInterval, 200, \
3592 "Pause between each check (in milliseconds)") \
3593 \
3594 /* recompilation */ \
3595 product_pd(intx, CompileThreshold, \
3596 "number of interpreted method invocations before (re-)compiling") \
3597 \
3598 product(double, CompileThresholdScaling, 1.0, \
3599 "Factor to control when first compilation happens " \
3600 "(both with and without tiered compilation)") \
3601 \
3602 product(intx, Tier0InvokeNotifyFreqLog, 7, \
3603 "Interpreter (tier 0) invocation notification frequency") \
3604 \
3605 product(intx, Tier2InvokeNotifyFreqLog, 11, \
3606 "C1 without MDO (tier 2) invocation notification frequency") \
3607 \
3608 product(intx, Tier3InvokeNotifyFreqLog, 10, \
3609 "C1 with MDO profiling (tier 3) invocation notification " \
3610 "frequency") \
3611 \
3612 product(intx, Tier23InlineeNotifyFreqLog, 20, \
3613 "Inlinee invocation (tiers 2 and 3) notification frequency") \
3614 \
3615 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
3616 "Interpreter (tier 0) invocation notification frequency") \
3617 \
3618 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
3619 "C1 without MDO (tier 2) invocation notification frequency") \
3620 \
3621 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
3622 "C1 with MDO profiling (tier 3) invocation notification " \
3623 "frequency") \
3624 \
3625 product(intx, Tier2CompileThreshold, 0, \
3626 "threshold at which tier 2 compilation is invoked") \
3627 \
3628 product(intx, Tier2BackEdgeThreshold, 0, \
3629 "Back edge threshold at which tier 2 compilation is invoked") \
3630 \
3631 product(intx, Tier3InvocationThreshold, 200, \
3632 "Compile if number of method invocations crosses this " \
3633 "threshold") \
3634 \
3635 product(intx, Tier3MinInvocationThreshold, 100, \
3636 "Minimum invocation to compile at tier 3") \
3637 \
3638 product(intx, Tier3CompileThreshold, 2000, \
3639 "Threshold at which tier 3 compilation is invoked (invocation " \
3640 "minimum must be satisfied") \
3641 \
3642 product(intx, Tier3BackEdgeThreshold, 60000, \
3643 "Back edge threshold at which tier 3 OSR compilation is invoked") \
3644 \
3645 product(intx, Tier4InvocationThreshold, 5000, \
3646 "Compile if number of method invocations crosses this " \
3647 "threshold") \
3648 \
3649 product(intx, Tier4MinInvocationThreshold, 600, \
3650 "Minimum invocation to compile at tier 4") \
3651 \
3652 product(intx, Tier4CompileThreshold, 15000, \
3653 "Threshold at which tier 4 compilation is invoked (invocation " \
3654 "minimum must be satisfied") \
3655 \
3656 product(intx, Tier4BackEdgeThreshold, 40000, \
3657 "Back edge threshold at which tier 4 OSR compilation is invoked") \
3658 \
3659 product(intx, Tier3DelayOn, 5, \
3660 "If C2 queue size grows over this amount per compiler thread " \
3661 "stop compiling at tier 3 and start compiling at tier 2") \
3662 \
3663 product(intx, Tier3DelayOff, 2, \
3664 "If C2 queue size is less than this amount per compiler thread " \
3665 "allow methods compiled at tier 2 transition to tier 3") \
3666 \
3667 product(intx, Tier3LoadFeedback, 5, \
3668 "Tier 3 thresholds will increase twofold when C1 queue size " \
3669 "reaches this amount per compiler thread") \
3670 \
3671 product(intx, Tier4LoadFeedback, 3, \
3672 "Tier 4 thresholds will increase twofold when C2 queue size " \
3673 "reaches this amount per compiler thread") \
3674 \
3675 product(intx, TieredCompileTaskTimeout, 50, \
3676 "Kill compile task if method was not used within " \
3677 "given timeout in milliseconds") \
3678 \
3679 product(intx, TieredStopAtLevel, 4, \
3680 "Stop at given compilation level") \
3681 \
3682 product(intx, Tier0ProfilingStartPercentage, 200, \
3683 "Start profiling in interpreter if the counters exceed tier 3 " \
3684 "thresholds by the specified percentage") \
3685 \
3686 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \
3687 "Increase the compile threshold for C1 compilation if the code " \
3688 "cache is filled by the specified percentage") \
3689 \
3690 product(intx, TieredRateUpdateMinTime, 1, \
3691 "Minimum rate sampling interval (in milliseconds)") \
3692 \
3693 product(intx, TieredRateUpdateMaxTime, 25, \
3694 "Maximum rate sampling interval (in milliseconds)") \
3695 \
3696 product_pd(bool, TieredCompilation, \
3697 "Enable tiered compilation") \
3698 \
3699 product(bool, PrintTieredEvents, false, \
3700 "Print tiered events notifications") \
3701 \
3702 product_pd(intx, OnStackReplacePercentage, \
3703 "NON_TIERED number of method invocations/branches (expressed as " \
3704 "% of CompileThreshold) before (re-)compiling OSR code") \
3705 \
3706 product(intx, InterpreterProfilePercentage, 33, \
3707 "NON_TIERED number of method invocations/branches (expressed as " \
3708 "% of CompileThreshold) before profiling in the interpreter") \
3709 \
3710 develop(intx, MaxRecompilationSearchLength, 10, \
3711 "The maximum number of frames to inspect when searching for " \
3712 "recompilee") \
3713 \
3714 develop(intx, MaxInterpretedSearchLength, 3, \
3715 "The maximum number of interpreted frames to skip when searching "\
3716 "for recompilee") \
3717 \
3718 develop(intx, DesiredMethodLimit, 8000, \
3719 "The desired maximum method size (in bytecodes) after inlining") \
3720 \
3721 develop(intx, HugeMethodLimit, 8000, \
3722 "Don't compile methods larger than this if " \
3723 "+DontCompileHugeMethods") \
3724 \
3725 /* New JDK 1.4 reflection implementation */ \
3726 \
3727 develop(intx, FastSuperclassLimit, 8, \
3728 "Depth of hardwired instanceof accelerator array") \
3729 \
3730 /* Properties for Java libraries */ \
3731 \
3732 product(uintx, MaxDirectMemorySize, 0, \
3733 "Maximum total size of NIO direct-buffer allocations") \
3734 \
3735 /* Flags used for temporary code during development */ \
3736 \
3737 diagnostic(bool, UseNewCode, false, \
3738 "Testing Only: Use the new version while testing") \
3739 \
3740 diagnostic(bool, UseNewCode2, false, \
3741 "Testing Only: Use the new version while testing") \
3742 \
3743 diagnostic(bool, UseNewCode3, false, \
3744 "Testing Only: Use the new version while testing") \
3745 \
3746 /* flags for performance data collection */ \
3747 \
3748 product(bool, UsePerfData, falseInEmbedded, \
3749 "Flag to disable jvmstat instrumentation for performance testing "\
3750 "and problem isolation purposes") \
3751 \
3752 product(bool, PerfDataSaveToFile, false, \
3753 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3754 \
3755 product(ccstr, PerfDataSaveFile, NULL, \
3756 "Save PerfData memory to the specified absolute pathname. " \
3757 "The string %p in the file name (if present) " \
3758 "will be replaced by pid") \
3759 \
3760 product(intx, PerfDataSamplingInterval, 50, \
3761 "Data sampling interval (in milliseconds)") \
3762 \
3763 develop(bool, PerfTraceDataCreation, false, \
3764 "Trace creation of Performance Data Entries") \
3765 \
3766 develop(bool, PerfTraceMemOps, false, \
3767 "Trace PerfMemory create/attach/detach calls") \
3768 \
3769 product(bool, PerfDisableSharedMem, false, \
3770 "Store performance data in standard memory") \
3771 \
3772 product(intx, PerfDataMemorySize, 32*K, \
3773 "Size of performance data memory region. Will be rounded " \
3774 "up to a multiple of the native os page size.") \
3775 \
3776 product(intx, PerfMaxStringConstLength, 1024, \
3777 "Maximum PerfStringConstant string length before truncation") \
3778 \
3779 product(bool, PerfAllowAtExitRegistration, false, \
3780 "Allow registration of atexit() methods") \
3781 \
3782 product(bool, PerfBypassFileSystemCheck, false, \
3783 "Bypass Win32 file system criteria checks (Windows Only)") \
3784 \
3785 product(intx, UnguardOnExecutionViolation, 0, \
3786 "Unguard page and retry on no-execute fault (Win32 only) " \
3787 "0=off, 1=conservative, 2=aggressive") \
3788 \
3789 /* Serviceability Support */ \
3790 \
3791 product(bool, ManagementServer, false, \
3792 "Create JMX Management Server") \
3793 \
3794 product(bool, DisableAttachMechanism, false, \
3795 "Disable mechanism that allows tools to attach to this VM") \
3796 \
3797 product(bool, StartAttachListener, false, \
3798 "Always start Attach Listener at VM startup") \
3799 \
3800 manageable(bool, PrintConcurrentLocks, false, \
3801 "Print java.util.concurrent locks in thread dump") \
3802 \
3803 product(bool, TransmitErrorReport, false, \
3804 "Enable error report transmission on erroneous termination") \
3805 \
3806 product(ccstr, ErrorReportServer, NULL, \
3807 "Override built-in error report server address") \
3808 \
3809 /* Shared spaces */ \
3810 \
3811 product(bool, UseSharedSpaces, true, \
3812 "Use shared spaces for metadata") \
3813 \
3814 product(bool, VerifySharedSpaces, false, \
3815 "Verify shared spaces (false for default archive, true for " \
3816 "archive specified by -XX:SharedArchiveFile)") \
3817 \
3818 product(bool, RequireSharedSpaces, false, \
3819 "Require shared spaces for metadata") \
3820 \
3821 product(bool, DumpSharedSpaces, false, \
3822 "Special mode: JVM reads a class list, loads classes, builds " \
3823 "shared spaces, and dumps the shared spaces to a file to be " \
3824 "used in future JVM runs") \
3825 \
3826 product(bool, PrintSharedSpaces, false, \
3827 "Print usage of shared spaces") \
3828 \
3829 product(bool, PrintSharedArchiveAndExit, false, \
3830 "Print shared archive file contents") \
3831 \
3832 product(bool, PrintSharedDictionary, false, \
3833 "If PrintSharedArchiveAndExit is true, also print the shared " \
3834 "dictionary") \
3835 \
3836 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3837 "Size of read-write space for metadata (in bytes)") \
3838 \
3839 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3840 "Size of read-only space for metadata (in bytes)") \
3841 \
3842 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \
3843 "Size of the shared miscellaneous data area (in bytes)") \
3844 \
3845 product(uintx, SharedMiscCodeSize, 120*K, \
3846 "Size of the shared miscellaneous code area (in bytes)") \
3847 \
3848 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \
3849 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \
3850 "Address to allocate shared memory region for class data") \
3851 \
3852 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \
3853 "Do not quit -Xshare:dump even if we encounter unverifiable " \
3854 "classes. Just exclude them from the shared dictionary.") \
3855 \
3856 diagnostic(bool, PrintMethodHandleStubs, false, \
3857 "Print generated stub code for method handles") \
3858 \
3859 develop(bool, TraceMethodHandles, false, \
3860 "trace internal method handle operations") \
3861 \
3862 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
3863 "perform extra checks when constructing method handles") \
3864 \
3865 diagnostic(bool, ShowHiddenFrames, false, \
3866 "show method handle implementation frames (usually hidden)") \
3867 \
3868 experimental(bool, TrustFinalNonStaticFields, false, \
3869 "trust final non-static declarations for constant folding") \
3870 \
3871 diagnostic(bool, FoldStableValues, true, \
3872 "Optimize loads from stable fields (marked w/ @Stable)") \
3873 \
3874 develop(bool, TraceInvokeDynamic, false, \
3875 "trace internal invoke dynamic operations") \
3876 \
3877 diagnostic(bool, PauseAtStartup, false, \
3878 "Causes the VM to pause at startup time and wait for the pause " \
3879 "file to be removed (default: ./vm.paused.<pid>)") \
3880 \
3881 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3882 "The file to create and for whose removal to await when pausing " \
3883 "at startup. (default: ./vm.paused.<pid>)") \
3884 \
3885 diagnostic(bool, PauseAtExit, false, \
3886 "Pause and wait for keypress on exit if a debugger is attached") \
3887 \
3888 product(bool, ExtendedDTraceProbes, false, \
3889 "Enable performance-impacting dtrace probes") \
3890 \
3891 product(bool, DTraceMethodProbes, false, \
3892 "Enable dtrace probes for method-entry and method-exit") \
3893 \
3894 product(bool, DTraceAllocProbes, false, \
3895 "Enable dtrace probes for object allocation") \
3896 \
3897 product(bool, DTraceMonitorProbes, false, \
3898 "Enable dtrace probes for monitor events") \
3899 \
3900 product(bool, RelaxAccessControlCheck, false, \
3901 "Relax the access control checks in the verifier") \
3902 \
3903 diagnostic(bool, PrintDTraceDOF, false, \
3904 "Print the DTrace DOF passed to the system for JSDT probes") \
3905 \
3906 product(uintx, StringTableSize, defaultStringTableSize, \
3907 "Number of buckets in the interned String table") \
3908 \
3909 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \
3910 "Number of buckets in the JVM internal Symbol table") \
3911 \
3912 product(bool, UseStringDeduplication, false, \
3913 "Use string deduplication") \
3914 \
3915 product(bool, PrintStringDeduplicationStatistics, false, \
3916 "Print string deduplication statistics") \
3917 \
3918 product(uintx, StringDeduplicationAgeThreshold, 3, \
3919 "A string must reach this age (or be promoted to an old region) " \
3920 "to be considered for deduplication") \
3921 \
3922 diagnostic(bool, StringDeduplicationResizeALot, false, \
3923 "Force table resize every time the table is scanned") \
3924 \
3925 diagnostic(bool, StringDeduplicationRehashALot, false, \
3926 "Force table rehash every time the table is scanned") \
3927 \
3928 develop(bool, TraceDefaultMethods, false, \
3929 "Trace the default method processing steps") \
3930 \
3931 develop(bool, VerifyGenericSignatures, false, \
3932 "Abort VM on erroneous or inconsistent generic signatures") \
3933 \
3934 diagnostic(bool, WhiteBoxAPI, false, \
3935 "Enable internal testing APIs") \
3936 \
3937 product(bool, PrintGCCause, true, \
3938 "Include GC cause in GC logging") \
3939 \
3940 experimental(intx, SurvivorAlignmentInBytes, 0, \
3941 "Default survivor space alignment in bytes") \
3942 \
3943 product(bool , AllowNonVirtualCalls, false, \
3944 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \
3945 \
3946 product(ccstr, DumpLoadedClassList, NULL, \
3947 "Dump the names all loaded classes, that could be stored into " \
3948 "the CDS archive, in the specified file") \
3949 \
3950 product(ccstr, SharedClassListFile, NULL, \
3951 "Override the default CDS class list") \
3952 \
3953 diagnostic(ccstr, SharedArchiveFile, NULL, \
3954 "Override the default location of the CDS archive file") \
3955 \
3956 product(ccstr, ExtraSharedClassListFile, NULL, \
3957 "Extra classlist for building the CDS archive file") \
3958 \
3959 experimental(size_t, ArrayAllocatorMallocLimit, \
3960 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \
3961 "Allocation less than this value will be allocated " \
3962 "using malloc. Larger allocations will use mmap.") \
3963 \
3964 experimental(bool, AlwaysAtomicAccesses, false, \
3965 "Accesses to all variables should always be atomic") \
3966 \
3967 product(bool, EnableTracing, false, \
3968 "Enable event-based tracing") \
3969 \
3970 product(bool, UseLockedTracing, false, \
3971 "Use locked-tracing when doing event-based tracing")
3972
3973 /*
3974 * Macros for factoring of globals
3975 */
3976
3977 // Interface macros
3978 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3979 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
3980 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3981 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3982 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3983 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3984 #ifdef PRODUCT
3985 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value;
3986 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name;
3987 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name;
3988 #else
3989 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
3990 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
3991 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3992 #endif
3993 // Special LP64 flags, product only needed for now.
3994 #ifdef _LP64
3995 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3996 #else
3997 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3998 #endif // _LP64
3999
4000 // Implementation macros
4001 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
4002 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
4003 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
4004 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
4005 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
4006 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
4007 #ifdef PRODUCT
4008 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value;
4009 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name;
4010 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value;
4011 #else
4012 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
4013 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
4014 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
4015 #endif
4016 #ifdef _LP64
4017 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
4018 #else
4019 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
4020 #endif // _LP64
4021
4022 RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG)
4023
4024 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
4025
4026 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
4027
4028 // Extensions
4029
4030 #include "runtime/globals_ext.hpp"
4031
4032 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP