1 /*
2 * Copyright (c) 1997, 2018, 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_OS_FAMILY_linux
56 # include "globals_linux.hpp"
57 #endif
58 #ifdef TARGET_OS_FAMILY_solaris
59 # include "globals_solaris.hpp"
60 #endif
61 #ifdef TARGET_OS_FAMILY_windows
62 # include "globals_windows.hpp"
63 #endif
64 #ifdef TARGET_OS_FAMILY_aix
65 # include "globals_aix.hpp"
66 #endif
67 #ifdef TARGET_OS_FAMILY_bsd
68 # include "globals_bsd.hpp"
69 #endif
70 #ifdef TARGET_OS_ARCH_linux_x86
71 # include "globals_linux_x86.hpp"
72 #endif
73 #ifdef TARGET_OS_ARCH_linux_sparc
74 # include "globals_linux_sparc.hpp"
75 #endif
76 #ifdef TARGET_OS_ARCH_linux_zero
77 # include "globals_linux_zero.hpp"
78 #endif
79 #ifdef TARGET_OS_ARCH_solaris_x86
80 # include "globals_solaris_x86.hpp"
81 #endif
82 #ifdef TARGET_OS_ARCH_solaris_sparc
83 # include "globals_solaris_sparc.hpp"
84 #endif
85 #ifdef TARGET_OS_ARCH_windows_x86
86 # include "globals_windows_x86.hpp"
87 #endif
88 #ifdef TARGET_OS_ARCH_linux_arm
89 # include "globals_linux_arm.hpp"
90 #endif
91 #ifdef TARGET_OS_ARCH_linux_ppc
92 # include "globals_linux_ppc.hpp"
93 #endif
94 #ifdef TARGET_OS_ARCH_aix_ppc
95 # include "globals_aix_ppc.hpp"
96 #endif
97 #ifdef TARGET_OS_ARCH_bsd_x86
98 # include "globals_bsd_x86.hpp"
99 #endif
100 #ifdef TARGET_OS_ARCH_bsd_zero
101 # include "globals_bsd_zero.hpp"
102 #endif
103 #ifdef COMPILER1
104 #ifdef TARGET_ARCH_x86
105 # include "c1_globals_x86.hpp"
106 #endif
107 #ifdef TARGET_ARCH_sparc
108 # include "c1_globals_sparc.hpp"
109 #endif
110 #ifdef TARGET_ARCH_arm
111 # include "c1_globals_arm.hpp"
112 #endif
113 #ifdef TARGET_ARCH_ppc
114 # include "c1_globals_ppc.hpp"
115 #endif
116 #ifdef TARGET_OS_FAMILY_linux
117 # include "c1_globals_linux.hpp"
118 #endif
119 #ifdef TARGET_OS_FAMILY_solaris
120 # include "c1_globals_solaris.hpp"
121 #endif
122 #ifdef TARGET_OS_FAMILY_windows
123 # include "c1_globals_windows.hpp"
124 #endif
125 #ifdef TARGET_OS_FAMILY_aix
126 # include "c1_globals_aix.hpp"
127 #endif
128 #ifdef TARGET_OS_FAMILY_bsd
129 # include "c1_globals_bsd.hpp"
130 #endif
131 #endif
132 #ifdef COMPILER2
133 #ifdef TARGET_ARCH_x86
134 # include "c2_globals_x86.hpp"
135 #endif
136 #ifdef TARGET_ARCH_sparc
137 # include "c2_globals_sparc.hpp"
138 #endif
139 #ifdef TARGET_ARCH_arm
140 # include "c2_globals_arm.hpp"
141 #endif
142 #ifdef TARGET_ARCH_ppc
143 # include "c2_globals_ppc.hpp"
144 #endif
145 #ifdef TARGET_OS_FAMILY_linux
146 # include "c2_globals_linux.hpp"
147 #endif
148 #ifdef TARGET_OS_FAMILY_solaris
149 # include "c2_globals_solaris.hpp"
150 #endif
151 #ifdef TARGET_OS_FAMILY_windows
152 # include "c2_globals_windows.hpp"
153 #endif
154 #ifdef TARGET_OS_FAMILY_aix
155 # include "c2_globals_aix.hpp"
156 #endif
157 #ifdef TARGET_OS_FAMILY_bsd
158 # include "c2_globals_bsd.hpp"
159 #endif
160 #endif
161 #ifdef SHARK
162 #ifdef TARGET_ARCH_zero
163 # include "shark_globals_zero.hpp"
164 #endif
165 #endif
166
167 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
168 define_pd_global(bool, BackgroundCompilation, false);
169 define_pd_global(bool, UseTLAB, false);
170 define_pd_global(bool, CICompileOSR, false);
171 define_pd_global(bool, UseTypeProfile, false);
172 define_pd_global(bool, UseOnStackReplacement, false);
173 define_pd_global(bool, InlineIntrinsics, false);
174 define_pd_global(bool, PreferInterpreterNativeStubs, true);
175 define_pd_global(bool, ProfileInterpreter, false);
176 define_pd_global(bool, ProfileTraps, false);
177 define_pd_global(bool, TieredCompilation, false);
178
179 define_pd_global(intx, CompileThreshold, 0);
180 define_pd_global(intx, BackEdgeThreshold, 0);
181
182 define_pd_global(intx, OnStackReplacePercentage, 0);
183 define_pd_global(bool, ResizeTLAB, false);
184 define_pd_global(intx, FreqInlineSize, 0);
185 define_pd_global(intx, NewSizeThreadIncrease, 4*K);
186 define_pd_global(intx, InlineClassNatives, true);
187 define_pd_global(intx, InlineUnsafeOps, true);
188 define_pd_global(intx, InitialCodeCacheSize, 160*K);
189 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
190 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
191 define_pd_global(intx, CodeCacheMinBlockLength, 1);
192 define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K);
193 define_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M));
194 define_pd_global(bool, NeverActAsServerClassMachine, true);
195 define_pd_global(uint64_t,MaxRAM, 1ULL*G);
196 #define CI_COMPILER_COUNT 0
197 #else
198
199 #ifdef COMPILER2
200 #define CI_COMPILER_COUNT 2
201 #else
202 #define CI_COMPILER_COUNT 1
203 #endif // COMPILER2
204
205 #endif // no compilers
206
207 // string type aliases used only in this file
208 typedef const char* ccstr;
209 typedef const char* ccstrlist; // represents string arguments which accumulate
210
211 struct Flag {
212 enum Flags {
213 // value origin
214 DEFAULT = 0,
215 COMMAND_LINE = 1,
216 ENVIRON_VAR = 2,
217 CONFIG_FILE = 3,
218 MANAGEMENT = 4,
219 ERGONOMIC = 5,
220 ATTACH_ON_DEMAND = 6,
221 INTERNAL = 7,
222
223 LAST_VALUE_ORIGIN = INTERNAL,
224 VALUE_ORIGIN_BITS = 4,
225 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
226
227 // flag kind
228 KIND_PRODUCT = 1 << 4,
229 KIND_MANAGEABLE = 1 << 5,
230 KIND_DIAGNOSTIC = 1 << 6,
231 KIND_EXPERIMENTAL = 1 << 7,
232 KIND_NOT_PRODUCT = 1 << 8,
233 KIND_DEVELOP = 1 << 9,
234 KIND_PLATFORM_DEPENDENT = 1 << 10,
235 KIND_READ_WRITE = 1 << 11,
236 KIND_C1 = 1 << 12,
237 KIND_C2 = 1 << 13,
238 KIND_ARCH = 1 << 14,
239 KIND_SHARK = 1 << 15,
240 KIND_LP64_PRODUCT = 1 << 16,
241 KIND_COMMERCIAL = 1 << 17,
242
243 KIND_MASK = ~VALUE_ORIGIN_MASK
244 };
245
246 const char* _type;
247 const char* _name;
248 void* _addr;
249 NOT_PRODUCT(const char* _doc;)
250 Flags _flags;
251
252 // points to all Flags static array
253 static Flag* flags;
254
255 // number of flags
256 static size_t numFlags;
257
258 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false);
259 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
260
261 void check_writable();
262
263 bool is_bool() const;
264 bool get_bool() const;
265 void set_bool(bool value);
266
267 bool is_intx() const;
268 intx get_intx() const;
269 void set_intx(intx value);
270
271 bool is_uintx() const;
272 uintx get_uintx() const;
273 void set_uintx(uintx value);
274
275 bool is_uint64_t() const;
276 uint64_t get_uint64_t() const;
277 void set_uint64_t(uint64_t value);
278
279 bool is_double() const;
280 double get_double() const;
281 void set_double(double value);
282
283 bool is_ccstr() const;
284 bool ccstr_accumulates() const;
285 ccstr get_ccstr() const;
286 void set_ccstr(ccstr value);
287
288 Flags get_origin();
289 void set_origin(Flags origin);
290
291 bool is_default();
292 bool is_ergonomic();
293 bool is_command_line();
294
295 bool is_product() const;
296 bool is_manageable() const;
297 bool is_diagnostic() const;
298 bool is_experimental() const;
299 bool is_notproduct() const;
300 bool is_develop() const;
301 bool is_read_write() const;
302 bool is_commercial() const;
303
304 bool is_constant_in_binary() const;
305
306 bool is_unlocker() const;
307 bool is_unlocked() const;
308 bool is_writeable() const;
309 bool is_external() const;
310
311 bool is_unlocker_ext() const;
312 bool is_unlocked_ext() const;
313 bool is_writeable_ext() const;
314 bool is_external_ext() const;
315
316 void unlock_diagnostic();
317
318 void get_locked_message(char*, int) const;
319 void get_locked_message_ext(char*, int) const;
320
321 void print_on(outputStream* st, bool withComments = false );
322 void print_kind(outputStream* st);
323 void print_as_flag(outputStream* st);
324 };
325
326 // debug flags control various aspects of the VM and are global accessible
327
328 // use FlagSetting to temporarily change some debug flag
329 // e.g. FlagSetting fs(DebugThisAndThat, true);
330 // restored to previous value upon leaving scope
331 class FlagSetting {
332 bool val;
333 bool* flag;
334 public:
335 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
336 ~FlagSetting() { *flag = val; }
337 };
338
339
340 class CounterSetting {
341 intx* counter;
342 public:
343 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
344 ~CounterSetting() { (*counter)--; }
345 };
346
347
348 class UIntFlagSetting {
349 uintx val;
350 uintx* flag;
351 public:
352 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
353 ~UIntFlagSetting() { *flag = val; }
354 };
355
356
357 class DoubleFlagSetting {
358 double val;
359 double* flag;
360 public:
361 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
362 ~DoubleFlagSetting() { *flag = val; }
363 };
364
365
366 class CommandLineFlags {
367 public:
368 static bool boolAt(const char* name, size_t len, bool* value);
369 static bool boolAt(const char* name, bool* value) { return boolAt(name, strlen(name), value); }
370 static bool boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin);
371 static bool boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); }
372
373 static bool intxAt(const char* name, size_t len, intx* value);
374 static bool intxAt(const char* name, intx* value) { return intxAt(name, strlen(name), value); }
375 static bool intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin);
376 static bool intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); }
377
378 static bool uintxAt(const char* name, size_t len, uintx* value);
379 static bool uintxAt(const char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
380 static bool uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin);
381 static bool uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
382
383 static bool uint64_tAt(const char* name, size_t len, uint64_t* value);
384 static bool uint64_tAt(const char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
385 static bool uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin);
386 static bool uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
387
388 static bool doubleAt(const char* name, size_t len, double* value);
389 static bool doubleAt(const char* name, double* value) { return doubleAt(name, strlen(name), value); }
390 static bool doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin);
391 static bool doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
392
393 static bool ccstrAt(const char* name, size_t len, ccstr* value);
394 static bool ccstrAt(const char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
395 // Contract: Flag will make private copy of the incoming value.
396 // Outgoing value is always malloc-ed, and caller MUST call free.
397 static bool ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin);
398 static bool ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
399
400 // Returns false if name is not a command line flag.
401 static bool wasSetOnCmdline(const char* name, bool* value);
402 static void printSetFlags(outputStream* out);
403
404 static void printFlags(outputStream* out, bool withComments);
405
406 static void verify() PRODUCT_RETURN;
407 };
408
409 // use this for flags that are true by default in the debug version but
410 // false in the optimized version, and vice versa
411 #ifdef ASSERT
412 #define trueInDebug true
413 #define falseInDebug false
414 #else
415 #define trueInDebug false
416 #define falseInDebug true
417 #endif
418
419 // use this for flags that are true per default in the product build
420 // but false in development builds, and vice versa
421 #ifdef PRODUCT
422 #define trueInProduct true
423 #define falseInProduct false
424 #else
425 #define trueInProduct false
426 #define falseInProduct true
427 #endif
428
429 #ifdef JAVASE_EMBEDDED
430 #define falseInEmbedded false
431 #else
432 #define falseInEmbedded true
433 #endif
434
435 // develop flags are settable / visible only during development and are constant in the PRODUCT version
436 // product flags are always settable / visible
437 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
438
439 // A flag must be declared with one of the following types:
440 // bool, intx, uintx, ccstr.
441 // The type "ccstr" is an alias for "const char*" and is used
442 // only in this file, because the macrology requires single-token type names.
443
444 // Note: Diagnostic options not meant for VM tuning or for product modes.
445 // They are to be used for VM quality assurance or field diagnosis
446 // of VM bugs. They are hidden so that users will not be encouraged to
447 // try them as if they were VM ordinary execution options. However, they
448 // are available in the product version of the VM. Under instruction
449 // from support engineers, VM customers can turn them on to collect
450 // diagnostic information about VM problems. To use a VM diagnostic
451 // option, you must first specify +UnlockDiagnosticVMOptions.
452 // (This master switch also affects the behavior of -Xprintflags.)
453 //
454 // experimental flags are in support of features that are not
455 // part of the officially supported product, but are available
456 // for experimenting with. They could, for example, be performance
457 // features that may not have undergone full or rigorous QA, but which may
458 // help performance in some cases and released for experimentation
459 // by the community of users and developers. This flag also allows one to
460 // be able to build a fully supported product that nonetheless also
461 // ships with some unsupported, lightly tested, experimental features.
462 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
463 // UnlockExperimentalVMOptions flag, which allows the control and
464 // modification of the experimental flags.
465 //
466 // Nota bene: neither diagnostic nor experimental options should be used casually,
467 // and they are not supported on production loads, except under explicit
468 // direction from support engineers.
469 //
470 // manageable flags are writeable external product flags.
471 // They are dynamically writeable through the JDK management interface
472 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
473 // These flags are external exported interface (see CCC). The list of
474 // manageable flags can be queried programmatically through the management
475 // interface.
476 //
477 // A flag can be made as "manageable" only if
478 // - the flag is defined in a CCC as an external exported interface.
479 // - the VM implementation supports dynamic setting of the flag.
480 // This implies that the VM must *always* query the flag variable
481 // and not reuse state related to the flag state at any given time.
482 // - you want the flag to be queried programmatically by the customers.
483 //
484 // product_rw flags are writeable internal product flags.
485 // They are like "manageable" flags but for internal/private use.
486 // The list of product_rw flags are internal/private flags which
487 // may be changed/removed in a future release. It can be set
488 // through the management interface to get/set value
489 // when the name of flag is supplied.
490 //
491 // A flag can be made as "product_rw" only if
492 // - the VM implementation supports dynamic setting of the flag.
493 // This implies that the VM must *always* query the flag variable
494 // and not reuse state related to the flag state at any given time.
495 //
496 // Note that when there is a need to support develop flags to be writeable,
497 // it can be done in the same way as product_rw.
498
499 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
500 \
501 lp64_product(bool, UseCompressedOops, false, \
502 "Use 32-bit object references in 64-bit VM. " \
503 "lp64_product means flag is always constant in 32 bit VM") \
504 \
505 lp64_product(bool, UseCompressedClassPointers, false, \
506 "Use 32-bit class pointers in 64-bit VM. " \
507 "lp64_product means flag is always constant in 32 bit VM") \
508 \
509 notproduct(bool, CheckCompressedOops, true, \
510 "Generate checks in encoding/decoding code in debug VM") \
511 \
512 product_pd(uintx, HeapBaseMinAddress, \
513 "OS specific low limit for heap base address") \
514 \
515 diagnostic(bool, PrintCompressedOopsMode, false, \
516 "Print compressed oops base address and encoding mode") \
517 \
518 lp64_product(intx, ObjectAlignmentInBytes, 8, \
519 "Default object alignment in bytes, 8 is minimum") \
520 \
521 product(bool, AssumeMP, false, \
522 "Instruct the VM to assume multiple processors are available") \
523 \
524 /* UseMembar is theoretically a temp flag used for memory barrier \
525 * removal testing. It was supposed to be removed before FCS but has \
526 * been re-added (see 6401008) */ \
527 product_pd(bool, UseMembar, \
528 "(Unstable) Issues membars on thread state transitions") \
529 \
530 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
531 "Clean the chunk pool asynchronously") \
532 \
533 /* Temporary: See 6948537 */ \
534 experimental(bool, UseMemSetInBOT, true, \
535 "(Unstable) uses memset in BOT updates in GC code") \
536 \
537 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
538 "Enable normal processing of flags relating to field diagnostics")\
539 \
540 experimental(bool, UnlockExperimentalVMOptions, false, \
541 "Enable normal processing of flags relating to experimental " \
542 "features") \
543 \
544 product(bool, JavaMonitorsInStackTrace, true, \
545 "Print information about Java monitor locks when the stacks are" \
546 "dumped") \
547 \
548 product_pd(bool, UseLargePages, \
549 "Use large page memory") \
550 \
551 product_pd(bool, UseLargePagesIndividualAllocation, \
552 "Allocate large pages individually for better affinity") \
553 \
554 develop(bool, LargePagesIndividualAllocationInjectError, false, \
555 "Fail large pages individual allocation") \
556 \
557 product(bool, UseLargePagesInMetaspace, false, \
558 "Use large page memory in metaspace. " \
559 "Only used if UseLargePages is enabled.") \
560 \
561 develop(bool, TracePageSizes, false, \
562 "Trace page size selection and usage") \
563 \
564 product(bool, UseNUMA, false, \
565 "Use NUMA if available") \
566 \
567 product(bool, UseNUMAInterleaving, false, \
568 "Interleave memory across NUMA nodes if available") \
569 \
570 product(uintx, NUMAInterleaveGranularity, 2*M, \
571 "Granularity to use for NUMA interleaving on Windows OS") \
572 \
573 product(bool, ForceNUMA, false, \
574 "Force NUMA optimizations on single-node/UMA systems") \
575 \
576 product(uintx, NUMAChunkResizeWeight, 20, \
577 "Percentage (0-100) used to weigh the current sample when " \
578 "computing exponentially decaying average for " \
579 "AdaptiveNUMAChunkSizing") \
580 \
581 product(uintx, NUMASpaceResizeRate, 1*G, \
582 "Do not reallocate more than this amount per collection") \
583 \
584 product(bool, UseAdaptiveNUMAChunkSizing, true, \
585 "Enable adaptive chunk sizing for NUMA") \
586 \
587 product(bool, NUMAStats, false, \
588 "Print NUMA stats in detailed heap information") \
589 \
590 product(uintx, NUMAPageScanRate, 256, \
591 "Maximum number of pages to include in the page scan procedure") \
592 \
593 product_pd(bool, NeedsDeoptSuspend, \
594 "True for register window machines (sparc/ia64)") \
595 \
596 product(intx, UseSSE, 99, \
597 "Highest supported SSE instructions set on x86/x64") \
598 \
599 product(bool, UseAES, false, \
600 "Control whether AES instructions can be used on x86/x64") \
601 \
602 product(bool, UseSHA, false, \
603 "Control whether SHA instructions can be used on SPARC") \
604 \
605 product(uintx, LargePageSizeInBytes, 0, \
606 "Large page size (0 to let VM choose the page size)") \
607 \
608 product(uintx, LargePageHeapSizeThreshold, 128*M, \
609 "Use large pages if maximum heap is at least this big") \
610 \
611 product(bool, ForceTimeHighResolution, false, \
612 "Using high time resolution (for Win32 only)") \
613 \
614 develop(bool, TraceItables, false, \
615 "Trace initialization and use of itables") \
616 \
617 develop(bool, TracePcPatching, false, \
618 "Trace usage of frame::patch_pc") \
619 \
620 develop(bool, TraceJumps, false, \
621 "Trace assembly jumps in thread ring buffer") \
622 \
623 develop(bool, TraceRelocator, false, \
624 "Trace the bytecode relocator") \
625 \
626 develop(bool, TraceLongCompiles, false, \
627 "Print out every time compilation is longer than " \
628 "a given threshold") \
629 \
630 develop(bool, SafepointALot, false, \
631 "Generate a lot of safepoints. This works with " \
632 "GuaranteedSafepointInterval") \
633 \
634 product_pd(bool, BackgroundCompilation, \
635 "A thread requesting compilation is not blocked during " \
636 "compilation") \
637 \
638 product(bool, PrintVMQWaitTime, false, \
639 "Print out the waiting time in VM operation queue") \
640 \
641 develop(bool, NoYieldsInMicrolock, false, \
642 "Disable yields in microlock") \
643 \
644 develop(bool, TraceOopMapGeneration, false, \
645 "Show OopMapGeneration") \
646 \
647 product(bool, MethodFlushing, true, \
648 "Reclamation of zombie and not-entrant methods") \
649 \
650 develop(bool, VerifyStack, false, \
651 "Verify stack of each thread when it is entering a runtime call") \
652 \
653 diagnostic(bool, ForceUnreachable, false, \
654 "Make all non code cache addresses to be unreachable by " \
655 "forcing use of 64bit literal fixups") \
656 \
657 notproduct(bool, StressDerivedPointers, false, \
658 "Force scavenge when a derived pointer is detected on stack " \
659 "after rtm call") \
660 \
661 develop(bool, TraceDerivedPointers, false, \
662 "Trace traversal of derived pointers on stack") \
663 \
664 notproduct(bool, TraceCodeBlobStacks, false, \
665 "Trace stack-walk of codeblobs") \
666 \
667 product(bool, PrintJNIResolving, false, \
668 "Used to implement -v:jni") \
669 \
670 notproduct(bool, PrintRewrites, false, \
671 "Print methods that are being rewritten") \
672 \
673 product(bool, UseInlineCaches, true, \
674 "Use Inline Caches for virtual calls ") \
675 \
676 develop(bool, InlineArrayCopy, true, \
677 "Inline arraycopy native that is known to be part of " \
678 "base library DLL") \
679 \
680 develop(bool, InlineObjectHash, true, \
681 "Inline Object::hashCode() native that is known to be part " \
682 "of base library DLL") \
683 \
684 develop(bool, InlineNatives, true, \
685 "Inline natives that are known to be part of base library DLL") \
686 \
687 develop(bool, InlineMathNatives, true, \
688 "Inline SinD, CosD, etc.") \
689 \
690 develop(bool, InlineClassNatives, true, \
691 "Inline Class.isInstance, etc") \
692 \
693 develop(bool, InlineThreadNatives, true, \
694 "Inline Thread.currentThread, etc") \
695 \
696 develop(bool, InlineUnsafeOps, true, \
697 "Inline memory ops (native methods) from sun.misc.Unsafe") \
698 \
699 product(bool, CriticalJNINatives, true, \
700 "Check for critical JNI entry points") \
701 \
702 notproduct(bool, StressCriticalJNINatives, false, \
703 "Exercise register saving code in critical natives") \
704 \
705 product(bool, UseSSE42Intrinsics, false, \
706 "SSE4.2 versions of intrinsics") \
707 \
708 product(bool, UseAESIntrinsics, false, \
709 "Use intrinsics for AES versions of crypto") \
710 \
711 product(bool, UseSHA1Intrinsics, false, \
712 "Use intrinsics for SHA-1 crypto hash function") \
713 \
714 product(bool, UseSHA256Intrinsics, false, \
715 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions") \
716 \
717 product(bool, UseSHA512Intrinsics, false, \
718 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions") \
719 \
720 product(bool, UseCRC32Intrinsics, false, \
721 "use intrinsics for java.util.zip.CRC32") \
722 \
723 develop(bool, TraceCallFixup, false, \
724 "Trace all call fixups") \
725 \
726 develop(bool, DeoptimizeALot, false, \
727 "Deoptimize at every exit from the runtime system") \
728 \
729 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
730 "A comma separated list of bcis to deoptimize at") \
731 \
732 product(bool, DeoptimizeRandom, false, \
733 "Deoptimize random frames on random exit from the runtime system")\
734 \
735 notproduct(bool, ZombieALot, false, \
736 "Create zombies (non-entrant) at exit from the runtime system") \
737 \
738 product(bool, UnlinkSymbolsALot, false, \
739 "Unlink unreferenced symbols from the symbol table at safepoints")\
740 \
741 notproduct(bool, WalkStackALot, false, \
742 "Trace stack (no print) at every exit from the runtime system") \
743 \
744 product(bool, Debugging, false, \
745 "Set when executing debug methods in debug.cpp " \
746 "(to prevent triggering assertions)") \
747 \
748 notproduct(bool, StrictSafepointChecks, trueInDebug, \
749 "Enable strict checks that safepoints cannot happen for threads " \
750 "that use No_Safepoint_Verifier") \
751 \
752 notproduct(bool, VerifyLastFrame, false, \
753 "Verify oops on last frame on entry to VM") \
754 \
755 develop(bool, TraceHandleAllocation, false, \
756 "Print out warnings when suspiciously many handles are allocated")\
757 \
758 product(bool, UseCompilerSafepoints, true, \
759 "Stop at safepoints in compiled code") \
760 \
761 product(bool, FailOverToOldVerifier, true, \
762 "Fail over to old verifier when split verifier fails") \
763 \
764 develop(bool, ShowSafepointMsgs, false, \
765 "Show message about safepoint synchronization") \
766 \
767 product(bool, SafepointTimeout, false, \
768 "Time out and warn or fail after SafepointTimeoutDelay " \
769 "milliseconds if failed to reach safepoint") \
770 \
771 diagnostic(bool, AbortVMOnSafepointTimeout, false, \
772 "Abort upon failure to reach safepoint (see SafepointTimeout)") \
773 \
774 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
775 /* typically, at most a few retries are needed */ \
776 product(intx, SuspendRetryCount, 50, \
777 "Maximum retry count for an external suspend request") \
778 \
779 product(intx, SuspendRetryDelay, 5, \
780 "Milliseconds to delay per retry (* current_retry_count)") \
781 \
782 product(bool, AssertOnSuspendWaitFailure, false, \
783 "Assert/Guarantee on external suspend wait failure") \
784 \
785 product(bool, TraceSuspendWaitFailures, false, \
786 "Trace external suspend wait failures") \
787 \
788 product(bool, MaxFDLimit, true, \
789 "Bump the number of file descriptors to maximum in Solaris") \
790 \
791 diagnostic(bool, LogEvents, true, \
792 "Enable the various ring buffer event logs") \
793 \
794 diagnostic(uintx, LogEventsBufferEntries, 10, \
795 "Number of ring buffer event logs") \
796 \
797 product(bool, BytecodeVerificationRemote, true, \
798 "Enable the Java bytecode verifier for remote classes") \
799 \
800 product(bool, BytecodeVerificationLocal, false, \
801 "Enable the Java bytecode verifier for local classes") \
802 \
803 develop(bool, ForceFloatExceptions, trueInDebug, \
804 "Force exceptions on FP stack under/overflow") \
805 \
806 develop(bool, VerifyStackAtCalls, false, \
807 "Verify that the stack pointer is unchanged after calls") \
808 \
809 develop(bool, TraceJavaAssertions, false, \
810 "Trace java language assertions") \
811 \
812 notproduct(bool, CheckAssertionStatusDirectives, false, \
813 "Temporary - see javaClasses.cpp") \
814 \
815 notproduct(bool, PrintMallocFree, false, \
816 "Trace calls to C heap malloc/free allocation") \
817 \
818 product(bool, PrintOopAddress, false, \
819 "Always print the location of the oop") \
820 \
821 notproduct(bool, VerifyCodeCacheOften, false, \
822 "Verify compiled-code cache often") \
823 \
824 develop(bool, ZapDeadCompiledLocals, false, \
825 "Zap dead locals in compiler frames") \
826 \
827 notproduct(bool, ZapDeadLocalsOld, false, \
828 "Zap dead locals (old version, zaps all frames when " \
829 "entering the VM") \
830 \
831 notproduct(bool, CheckOopishValues, false, \
832 "Warn if value contains oop (requires ZapDeadLocals)") \
833 \
834 develop(bool, UseMallocOnly, false, \
835 "Use only malloc/free for allocation (no resource area/arena)") \
836 \
837 develop(bool, PrintMalloc, false, \
838 "Print all malloc/free calls") \
839 \
840 develop(bool, PrintMallocStatistics, false, \
841 "Print malloc/free statistics") \
842 \
843 develop(bool, ZapResourceArea, trueInDebug, \
844 "Zap freed resource/arena space with 0xABABABAB") \
845 \
846 notproduct(bool, ZapVMHandleArea, trueInDebug, \
847 "Zap freed VM handle space with 0xBCBCBCBC") \
848 \
849 develop(bool, ZapJNIHandleArea, trueInDebug, \
850 "Zap freed JNI handle space with 0xFEFEFEFE") \
851 \
852 notproduct(bool, ZapStackSegments, trueInDebug, \
853 "Zap allocated/freed stack segments with 0xFADFADED") \
854 \
855 develop(bool, ZapUnusedHeapArea, trueInDebug, \
856 "Zap unused heap space with 0xBAADBABE") \
857 \
858 develop(bool, TraceZapUnusedHeapArea, false, \
859 "Trace zapping of unused heap space") \
860 \
861 develop(bool, CheckZapUnusedHeapArea, false, \
862 "Check zapping of unused heap space") \
863 \
864 develop(bool, ZapFillerObjects, trueInDebug, \
865 "Zap filler objects with 0xDEAFBABE") \
866 \
867 develop(bool, PrintVMMessages, true, \
868 "Print VM messages on console") \
869 \
870 product(bool, PrintGCApplicationConcurrentTime, false, \
871 "Print the time the application has been running") \
872 \
873 product(bool, PrintGCApplicationStoppedTime, false, \
874 "Print the time the application has been stopped") \
875 \
876 diagnostic(bool, VerboseVerification, false, \
877 "Display detailed verification details") \
878 \
879 notproduct(uintx, ErrorHandlerTest, 0, \
880 "If > 0, provokes an error after VM initialization; the value " \
881 "determines which error to provoke. See test_error_handler() " \
882 "in debug.cpp.") \
883 \
884 develop(bool, Verbose, false, \
885 "Print additional debugging information from other modes") \
886 \
887 develop(bool, PrintMiscellaneous, false, \
888 "Print uncategorized debugging information (requires +Verbose)") \
889 \
890 develop(bool, WizardMode, false, \
891 "Print much more debugging information") \
892 \
893 product(bool, ShowMessageBoxOnError, false, \
894 "Keep process alive on VM fatal error") \
895 \
896 product(bool, CreateMinidumpOnCrash, false, \
897 "Create minidump on VM fatal error") \
898 \
899 product_pd(bool, UseOSErrorReporting, \
900 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
901 \
902 product(bool, SuppressFatalErrorMessage, false, \
903 "Report NO fatal error message (avoid deadlock)") \
904 \
905 product(ccstrlist, OnError, "", \
906 "Run user-defined commands on fatal error; see VMError.cpp " \
907 "for examples") \
908 \
909 product(ccstrlist, OnOutOfMemoryError, "", \
910 "Run user-defined commands on first java.lang.OutOfMemoryError") \
911 \
912 manageable(bool, HeapDumpBeforeFullGC, false, \
913 "Dump heap to file before any major stop-the-world GC") \
914 \
915 manageable(bool, HeapDumpAfterFullGC, false, \
916 "Dump heap to file after any major stop-the-world GC") \
917 \
918 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
919 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
920 \
921 manageable(ccstr, HeapDumpPath, NULL, \
922 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \
923 "directory) of the dump file (defaults to java_pid<pid>.hprof " \
924 "in the working directory)") \
925 \
926 develop(uintx, HeapDumpSegmentSize, 1*G, \
927 "Approximate segment size when generating a segmented heap dump") \
928 \
929 develop(bool, BreakAtWarning, false, \
930 "Execute breakpoint upon encountering VM warning") \
931 \
932 develop(bool, TraceVMOperation, false, \
933 "Trace VM operations") \
934 \
935 develop(bool, UseFakeTimers, false, \
936 "Tell whether the VM should use system time or a fake timer") \
937 \
938 product(ccstr, NativeMemoryTracking, "off", \
939 "Native memory tracking options") \
940 \
941 diagnostic(bool, PrintNMTStatistics, false, \
942 "Print native memory tracking summary data if it is on") \
943 \
944 diagnostic(bool, LogCompilation, false, \
945 "Log compilation activity in detail to LogFile") \
946 \
947 product(bool, PrintCompilation, false, \
948 "Print compilations") \
949 \
950 diagnostic(bool, TraceNMethodInstalls, false, \
951 "Trace nmethod installation") \
952 \
953 diagnostic(intx, ScavengeRootsInCode, 2, \
954 "0: do not allow scavengable oops in the code cache; " \
955 "1: allow scavenging from the code cache; " \
956 "2: emit as many constants as the compiler can see") \
957 \
958 product(bool, AlwaysRestoreFPU, false, \
959 "Restore the FPU control word after every JNI call (expensive)") \
960 \
961 diagnostic(bool, PrintCompilation2, false, \
962 "Print additional statistics per compilation") \
963 \
964 diagnostic(bool, PrintAdapterHandlers, false, \
965 "Print code generated for i2c/c2i adapters") \
966 \
967 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \
968 "Verify that i2c/c2i adapters are called properly") \
969 \
970 develop(bool, VerifyAdapterSharing, false, \
971 "Verify that the code for shared adapters is the equivalent") \
972 \
973 diagnostic(bool, PrintAssembly, false, \
974 "Print assembly code (using external disassembler.so)") \
975 \
976 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
977 "Print options string passed to disassembler.so") \
978 \
979 diagnostic(bool, PrintNMethods, false, \
980 "Print assembly code for nmethods when generated") \
981 \
982 diagnostic(bool, PrintNativeNMethods, false, \
983 "Print assembly code for native nmethods when generated") \
984 \
985 develop(bool, PrintDebugInfo, false, \
986 "Print debug information for all nmethods when generated") \
987 \
988 develop(bool, PrintRelocations, false, \
989 "Print relocation information for all nmethods when generated") \
990 \
991 develop(bool, PrintDependencies, false, \
992 "Print dependency information for all nmethods when generated") \
993 \
994 develop(bool, PrintExceptionHandlers, false, \
995 "Print exception handler tables for all nmethods when generated") \
996 \
997 develop(bool, StressCompiledExceptionHandlers, false, \
998 "Exercise compiled exception handlers") \
999 \
1000 develop(bool, InterceptOSException, false, \
1001 "Start debugger when an implicit OS (e.g. NULL) " \
1002 "exception happens") \
1003 \
1004 product(bool, PrintCodeCache, false, \
1005 "Print the code cache memory usage when exiting") \
1006 \
1007 develop(bool, PrintCodeCache2, false, \
1008 "Print detailed usage information on the code cache when exiting")\
1009 \
1010 product(bool, PrintCodeCacheOnCompilation, false, \
1011 "Print the code cache memory usage each time a method is " \
1012 "compiled") \
1013 \
1014 diagnostic(bool, PrintStubCode, false, \
1015 "Print generated stub code") \
1016 \
1017 product(bool, StackTraceInThrowable, true, \
1018 "Collect backtrace in throwable when exception happens") \
1019 \
1020 product(bool, OmitStackTraceInFastThrow, true, \
1021 "Omit backtraces for some 'hot' exceptions in optimized code") \
1022 \
1023 product(bool, ProfilerPrintByteCodeStatistics, false, \
1024 "Print bytecode statistics when dumping profiler output") \
1025 \
1026 product(bool, ProfilerRecordPC, false, \
1027 "Collect ticks for each 16 byte interval of compiled code") \
1028 \
1029 product(bool, ProfileVM, false, \
1030 "Profile ticks that fall within VM (either in the VM Thread " \
1031 "or VM code called through stubs)") \
1032 \
1033 product(bool, ProfileIntervals, false, \
1034 "Print profiles for each interval (see ProfileIntervalsTicks)") \
1035 \
1036 notproduct(bool, ProfilerCheckIntervals, false, \
1037 "Collect and print information on spacing of profiler ticks") \
1038 \
1039 develop(bool, PrintJVMWarnings, false, \
1040 "Print warnings for unimplemented JVM functions") \
1041 \
1042 product(bool, PrintWarnings, true, \
1043 "Print JVM warnings to output stream") \
1044 \
1045 notproduct(uintx, WarnOnStalledSpinLock, 0, \
1046 "Print warnings for stalled SpinLocks") \
1047 \
1048 product(bool, RegisterFinalizersAtInit, true, \
1049 "Register finalizable objects at end of Object.<init> or " \
1050 "after allocation") \
1051 \
1052 develop(bool, RegisterReferences, true, \
1053 "Tell whether the VM should register soft/weak/final/phantom " \
1054 "references") \
1055 \
1056 develop(bool, IgnoreRewrites, false, \
1057 "Suppress rewrites of bytecodes in the oopmap generator. " \
1058 "This is unsafe!") \
1059 \
1060 develop(bool, PrintCodeCacheExtension, false, \
1061 "Print extension of code cache") \
1062 \
1063 develop(bool, UsePrivilegedStack, true, \
1064 "Enable the security JVM functions") \
1065 \
1066 develop(bool, ProtectionDomainVerification, true, \
1067 "Verify protection domain before resolution in system dictionary")\
1068 \
1069 product(bool, ClassUnloading, true, \
1070 "Do unloading of classes") \
1071 \
1072 product(bool, ClassUnloadingWithConcurrentMark, true, \
1073 "Do unloading of classes with a concurrent marking cycle") \
1074 \
1075 develop(bool, DisableStartThread, false, \
1076 "Disable starting of additional Java threads " \
1077 "(for debugging only)") \
1078 \
1079 develop(bool, MemProfiling, false, \
1080 "Write memory usage profiling to log file") \
1081 \
1082 notproduct(bool, PrintSystemDictionaryAtExit, false, \
1083 "Print the system dictionary at exit") \
1084 \
1085 experimental(intx, PredictedLoadedClassCount, 0, \
1086 "Experimental: Tune loaded class cache starting size") \
1087 \
1088 diagnostic(bool, UnsyncloadClass, false, \
1089 "Unstable: VM calls loadClass unsynchronized. Custom " \
1090 "class loader must call VM synchronized for findClass " \
1091 "and defineClass.") \
1092 \
1093 product(bool, AlwaysLockClassLoader, false, \
1094 "Require the VM to acquire the class loader lock before calling " \
1095 "loadClass() even for class loaders registering " \
1096 "as parallel capable") \
1097 \
1098 product(bool, AllowParallelDefineClass, false, \
1099 "Allow parallel defineClass requests for class loaders " \
1100 "registering as parallel capable") \
1101 \
1102 product(bool, MustCallLoadClassInternal, false, \
1103 "Call loadClassInternal() rather than loadClass()") \
1104 \
1105 product_pd(bool, DontYieldALot, \
1106 "Throw away obvious excess yield calls (for Solaris only)") \
1107 \
1108 product_pd(bool, ConvertSleepToYield, \
1109 "Convert sleep(0) to thread yield " \
1110 "(may be off for Solaris to improve GUI)") \
1111 \
1112 product(bool, ConvertYieldToSleep, false, \
1113 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
1114 "behavior (Solaris only)") \
1115 \
1116 product(bool, UseBoundThreads, true, \
1117 "Bind user level threads to kernel threads (for Solaris only)") \
1118 \
1119 develop(bool, UseDetachedThreads, true, \
1120 "Use detached threads that are recycled upon termination " \
1121 "(for Solaris only)") \
1122 \
1123 experimental(bool, DisablePrimordialThreadGuardPages, false, \
1124 "Disable the use of stack guard pages if the JVM is loaded " \
1125 "on the primordial process thread") \
1126 \
1127 product(bool, UseLWPSynchronization, true, \
1128 "Use LWP-based instead of libthread-based synchronization " \
1129 "(SPARC only)") \
1130 \
1131 product(ccstr, SyncKnobs, NULL, \
1132 "(Unstable) Various monitor synchronization tunables") \
1133 \
1134 product(intx, EmitSync, 0, \
1135 "(Unsafe, Unstable) " \
1136 "Control emission of inline sync fast-path code") \
1137 \
1138 product(intx, MonitorBound, 0, "Bound Monitor population") \
1139 \
1140 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
1141 \
1142 product(intx, SyncFlags, 0, "(Unsafe, Unstable) Experimental Sync flags") \
1143 \
1144 product(intx, SyncVerbose, 0, "(Unstable)") \
1145 \
1146 product(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \
1147 \
1148 product(intx, hashCode, 5, \
1149 "(Unstable) select hashCode generation algorithm") \
1150 \
1151 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
1152 "(Unstable, Linux-specific) " \
1153 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \
1154 \
1155 product(bool, FilterSpuriousWakeups, true, \
1156 "Prevent spurious or premature wakeups from object.wait " \
1157 "(Solaris only)") \
1158 \
1159 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \
1160 \
1161 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \
1162 \
1163 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \
1164 \
1165 develop(bool, UsePthreads, false, \
1166 "Use pthread-based instead of libthread-based synchronization " \
1167 "(SPARC only)") \
1168 \
1169 product(bool, AdjustConcurrency, false, \
1170 "Call thr_setconcurrency at thread creation time to avoid " \
1171 "LWP starvation on MP systems (for Solaris Only)") \
1172 \
1173 product(bool, ReduceSignalUsage, false, \
1174 "Reduce the use of OS signals in Java and/or the VM") \
1175 \
1176 develop_pd(bool, ShareVtableStubs, \
1177 "Share vtable stubs (smaller code but worse branch prediction") \
1178 \
1179 develop(bool, LoadLineNumberTables, true, \
1180 "Tell whether the class file parser loads line number tables") \
1181 \
1182 develop(bool, LoadLocalVariableTables, true, \
1183 "Tell whether the class file parser loads local variable tables") \
1184 \
1185 develop(bool, LoadLocalVariableTypeTables, true, \
1186 "Tell whether the class file parser loads local variable type" \
1187 "tables") \
1188 \
1189 product(bool, AllowUserSignalHandlers, false, \
1190 "Do not complain if the application installs signal handlers " \
1191 "(Solaris & Linux only)") \
1192 \
1193 product(bool, UseSignalChaining, true, \
1194 "Use signal-chaining to invoke signal handlers installed " \
1195 "by the application (Solaris & Linux only)") \
1196 \
1197 product(bool, UseAltSigs, false, \
1198 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
1199 "internal signals (Solaris only)") \
1200 \
1201 product(bool, AllowJNIEnvProxy, false, \
1202 "Allow JNIEnv proxies for jdbx") \
1203 \
1204 product(bool, JNIDetachReleasesMonitors, true, \
1205 "JNI DetachCurrentThread releases monitors owned by thread") \
1206 \
1207 product(bool, RestoreMXCSROnJNICalls, false, \
1208 "Restore MXCSR when returning from JNI calls") \
1209 \
1210 product(bool, CheckJNICalls, false, \
1211 "Verify all arguments to JNI calls") \
1212 \
1213 product(bool, CheckEndorsedAndExtDirs, false, \
1214 "Verify the endorsed and extension directories are not used") \
1215 \
1216 product(bool, UseFastJNIAccessors, true, \
1217 "Use optimized versions of Get<Primitive>Field") \
1218 \
1219 product(intx, MaxJNILocalCapacity, 65536, \
1220 "Maximum allowable local JNI handle capacity to " \
1221 "EnsureLocalCapacity() and PushLocalFrame(), " \
1222 "where <= 0 is unlimited, default: 65536") \
1223 \
1224 product(bool, EagerXrunInit, false, \
1225 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1226 "but not all -Xrun libraries may support the state of the VM " \
1227 "at this time") \
1228 \
1229 product(bool, PreserveAllAnnotations, false, \
1230 "Preserve RuntimeInvisibleAnnotations as well " \
1231 "as RuntimeVisibleAnnotations") \
1232 \
1233 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1234 "Number of OutOfMemoryErrors preallocated with backtrace") \
1235 \
1236 product(bool, LazyBootClassLoader, true, \
1237 "Enable/disable lazy opening of boot class path entries") \
1238 \
1239 product(bool, UseXMMForArrayCopy, false, \
1240 "Use SSE2 MOVQ instruction for Arraycopy") \
1241 \
1242 product(intx, FieldsAllocationStyle, 1, \
1243 "0 - type based with oops first, 1 - with oops last, " \
1244 "2 - oops in super and sub classes are together") \
1245 \
1246 product(bool, CompactFields, true, \
1247 "Allocate nonstatic fields in gaps between previous fields") \
1248 \
1249 notproduct(bool, PrintFieldLayout, false, \
1250 "Print field layout for each class") \
1251 \
1252 product(intx, ContendedPaddingWidth, 128, \
1253 "How many bytes to pad the fields/classes marked @Contended with")\
1254 \
1255 product(bool, EnableContended, true, \
1256 "Enable @Contended annotation support") \
1257 \
1258 product(bool, RestrictContended, true, \
1259 "Restrict @Contended to trusted classes") \
1260 \
1261 product(bool, UseBiasedLocking, true, \
1262 "Enable biased locking in JVM") \
1263 \
1264 product(intx, BiasedLockingStartupDelay, 4000, \
1265 "Number of milliseconds to wait before enabling biased locking") \
1266 \
1267 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1268 "Print statistics of biased locking in JVM") \
1269 \
1270 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1271 "Threshold of number of revocations per type to try to " \
1272 "rebias all objects in the heap of that type") \
1273 \
1274 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1275 "Threshold of number of revocations per type to permanently " \
1276 "revoke biases of all objects in the heap of that type") \
1277 \
1278 product(intx, BiasedLockingDecayTime, 25000, \
1279 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1280 "type after previous bulk rebias") \
1281 \
1282 product(bool, ExitOnOutOfMemoryError, false, \
1283 "JVM exits on the first occurrence of an out-of-memory error") \
1284 \
1285 product(bool, CrashOnOutOfMemoryError, false, \
1286 "JVM aborts, producing an error log and core/mini dump, on the " \
1287 "first occurrence of an out-of-memory error") \
1288 \
1289 /* tracing */ \
1290 \
1291 notproduct(bool, TraceRuntimeCalls, false, \
1292 "Trace run-time calls") \
1293 \
1294 develop(bool, TraceJNICalls, false, \
1295 "Trace JNI calls") \
1296 \
1297 develop(bool, StressRewriter, false, \
1298 "Stress linktime bytecode rewriting") \
1299 \
1300 notproduct(bool, TraceJVMCalls, false, \
1301 "Trace JVM calls") \
1302 \
1303 product(ccstr, TraceJVMTI, NULL, \
1304 "Trace flags for JVMTI functions and events") \
1305 \
1306 /* This option can change an EMCP method into an obsolete method. */ \
1307 /* This can affect tests that except specific methods to be EMCP. */ \
1308 /* This option should be used with caution. */ \
1309 product(bool, StressLdcRewrite, false, \
1310 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1311 \
1312 product(intx, TraceRedefineClasses, 0, \
1313 "Trace level for JVMTI RedefineClasses") \
1314 \
1315 develop(bool, StressMethodComparator, false, \
1316 "Run the MethodComparator on all loaded methods") \
1317 \
1318 /* change to false by default sometime after Mustang */ \
1319 product(bool, VerifyMergedCPBytecodes, true, \
1320 "Verify bytecodes after RedefineClasses constant pool merging") \
1321 \
1322 develop(bool, TraceJNIHandleAllocation, false, \
1323 "Trace allocation/deallocation of JNI handle blocks") \
1324 \
1325 develop(bool, TraceThreadEvents, false, \
1326 "Trace all thread events") \
1327 \
1328 develop(bool, TraceBytecodes, false, \
1329 "Trace bytecode execution") \
1330 \
1331 develop(bool, TraceClassInitialization, false, \
1332 "Trace class initialization") \
1333 \
1334 develop(bool, TraceExceptions, false, \
1335 "Trace exceptions") \
1336 \
1337 develop(bool, TraceICs, false, \
1338 "Trace inline cache changes") \
1339 \
1340 notproduct(bool, TraceInvocationCounterOverflow, false, \
1341 "Trace method invocation counter overflow") \
1342 \
1343 develop(bool, TraceInlineCacheClearing, false, \
1344 "Trace clearing of inline caches in nmethods") \
1345 \
1346 develop(bool, TraceDependencies, false, \
1347 "Trace dependencies") \
1348 \
1349 develop(bool, VerifyDependencies, trueInDebug, \
1350 "Exercise and verify the compilation dependency mechanism") \
1351 \
1352 develop(bool, TraceNewOopMapGeneration, false, \
1353 "Trace OopMapGeneration") \
1354 \
1355 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1356 "Trace OopMapGeneration: print detailed cell states") \
1357 \
1358 develop(bool, TimeOopMap, false, \
1359 "Time calls to GenerateOopMap::compute_map() in sum") \
1360 \
1361 develop(bool, TimeOopMap2, false, \
1362 "Time calls to GenerateOopMap::compute_map() individually") \
1363 \
1364 develop(bool, TraceMonitorMismatch, false, \
1365 "Trace monitor matching failures during OopMapGeneration") \
1366 \
1367 develop(bool, TraceOopMapRewrites, false, \
1368 "Trace rewriting of method oops during oop map generation") \
1369 \
1370 develop(bool, TraceSafepoint, false, \
1371 "Trace safepoint operations") \
1372 \
1373 develop(bool, TraceICBuffer, false, \
1374 "Trace usage of IC buffer") \
1375 \
1376 develop(bool, TraceCompiledIC, false, \
1377 "Trace changes of compiled IC") \
1378 \
1379 notproduct(bool, TraceZapDeadLocals, false, \
1380 "Trace zapping dead locals") \
1381 \
1382 develop(bool, TraceStartupTime, false, \
1383 "Trace setup time") \
1384 \
1385 develop(bool, TraceProtectionDomainVerification, false, \
1386 "Trace protection domain verification") \
1387 \
1388 develop(bool, TraceClearedExceptions, false, \
1389 "Print when an exception is forcibly cleared") \
1390 \
1391 product(bool, TraceClassResolution, false, \
1392 "Trace all constant pool resolutions (for debugging)") \
1393 \
1394 product(bool, TraceBiasedLocking, false, \
1395 "Trace biased locking in JVM") \
1396 \
1397 product(bool, TraceMonitorInflation, false, \
1398 "Trace monitor inflation in JVM") \
1399 \
1400 /* gc */ \
1401 \
1402 product(bool, UseSerialGC, false, \
1403 "Use the Serial garbage collector") \
1404 \
1405 product(bool, UseG1GC, false, \
1406 "Use the Garbage-First garbage collector") \
1407 \
1408 product(bool, UseParallelGC, false, \
1409 "Use the Parallel Scavenge garbage collector") \
1410 \
1411 product(bool, UseParallelOldGC, false, \
1412 "Use the Parallel Old garbage collector") \
1413 \
1414 product(uintx, HeapMaximumCompactionInterval, 20, \
1415 "How often should we maximally compact the heap (not allowing " \
1416 "any dead space)") \
1417 \
1418 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1419 "The collection count for the first maximum compaction") \
1420 \
1421 product(bool, UseMaximumCompactionOnSystemGC, true, \
1422 "Use maximum compaction in the Parallel Old garbage collector " \
1423 "for a system GC") \
1424 \
1425 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1426 "The mean used by the parallel compact dead wood " \
1427 "limiter (a number between 0-100)") \
1428 \
1429 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1430 "The standard deviation used by the parallel compact dead wood " \
1431 "limiter (a number between 0-100)") \
1432 \
1433 product(uintx, ParallelGCThreads, 0, \
1434 "Number of parallel threads parallel gc will use") \
1435 \
1436 product(bool, UseDynamicNumberOfGCThreads, false, \
1437 "Dynamically choose the number of parallel threads " \
1438 "parallel gc will use") \
1439 \
1440 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
1441 "Force dynamic selection of the number of " \
1442 "parallel threads parallel gc will use to aid debugging") \
1443 \
1444 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \
1445 "Size of heap (bytes) per GC thread used in calculating the " \
1446 "number of GC threads") \
1447 \
1448 product(bool, TraceDynamicGCThreads, false, \
1449 "Trace the dynamic GC thread usage") \
1450 \
1451 develop(bool, ParallelOldGCSplitALot, false, \
1452 "Provoke splitting (copying data from a young gen space to " \
1453 "multiple destination spaces)") \
1454 \
1455 develop(uintx, ParallelOldGCSplitInterval, 3, \
1456 "How often to provoke splitting a young gen space") \
1457 \
1458 product(uintx, ConcGCThreads, 0, \
1459 "Number of threads concurrent gc will use") \
1460 \
1461 product(uintx, YoungPLABSize, 4096, \
1462 "Size of young gen promotion LAB's (in HeapWords)") \
1463 \
1464 product(uintx, OldPLABSize, 1024, \
1465 "Size of old gen promotion LAB's (in HeapWords)") \
1466 \
1467 product(uintx, GCTaskTimeStampEntries, 200, \
1468 "Number of time stamp entries per gc worker thread") \
1469 \
1470 product(bool, AlwaysTenure, false, \
1471 "Always tenure objects in eden (ParallelGC only)") \
1472 \
1473 product(bool, NeverTenure, false, \
1474 "Never tenure objects in eden, may tenure on overflow " \
1475 "(ParallelGC only)") \
1476 \
1477 product(bool, ScavengeBeforeFullGC, true, \
1478 "Scavenge youngest generation before each full GC, " \
1479 "used with UseParallelGC") \
1480 \
1481 develop(bool, ScavengeWithObjectsInToSpace, false, \
1482 "Allow scavenges to occur when to-space contains objects") \
1483 \
1484 product(bool, UseConcMarkSweepGC, false, \
1485 "Use Concurrent Mark-Sweep GC in the old generation") \
1486 \
1487 product(bool, ExplicitGCInvokesConcurrent, false, \
1488 "A System.gc() request invokes a concurrent collection; " \
1489 "(effective only when UseConcMarkSweepGC)") \
1490 \
1491 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1492 "A System.gc() request invokes a concurrent collection and " \
1493 "also unloads classes during such a concurrent gc cycle " \
1494 "(effective only when UseConcMarkSweepGC)") \
1495 \
1496 product(bool, GCLockerInvokesConcurrent, false, \
1497 "The exit of a JNI critical section necessitating a scavenge, " \
1498 "also kicks off a background concurrent collection") \
1499 \
1500 product(uintx, GCLockerEdenExpansionPercent, 5, \
1501 "How much the GC can expand the eden by while the GC locker " \
1502 "is active (as a percentage)") \
1503 \
1504 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \
1505 "Number of times to retry allocations when " \
1506 "blocked by the GC locker") \
1507 \
1508 develop(bool, UseCMSAdaptiveFreeLists, true, \
1509 "Use adaptive free lists in the CMS generation") \
1510 \
1511 develop(bool, UseAsyncConcMarkSweepGC, true, \
1512 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1513 \
1514 develop(bool, RotateCMSCollectionTypes, false, \
1515 "Rotate the CMS collections among concurrent and STW") \
1516 \
1517 product(bool, UseCMSBestFit, true, \
1518 "Use CMS best fit allocation strategy") \
1519 \
1520 product(bool, UseCMSCollectionPassing, true, \
1521 "Use passing of collection from background to foreground") \
1522 \
1523 product(bool, UseParNewGC, false, \
1524 "Use parallel threads in the new generation") \
1525 \
1526 product(bool, ParallelGCVerbose, false, \
1527 "Verbose output for parallel gc") \
1528 \
1529 product(uintx, ParallelGCBufferWastePct, 10, \
1530 "Wasted fraction of parallel allocation buffer") \
1531 \
1532 diagnostic(bool, ParallelGCRetainPLAB, false, \
1533 "Retain parallel allocation buffers across scavenges; " \
1534 "it is disabled because this currently conflicts with " \
1535 "parallel card scanning under certain conditions.") \
1536 \
1537 product(uintx, TargetPLABWastePct, 10, \
1538 "Target wasted space in last buffer as percent of overall " \
1539 "allocation") \
1540 \
1541 product(uintx, PLABWeight, 75, \
1542 "Percentage (0-100) used to weigh the current sample when " \
1543 "computing exponentially decaying average for ResizePLAB") \
1544 \
1545 product(bool, ResizePLAB, true, \
1546 "Dynamically resize (survivor space) promotion LAB's") \
1547 \
1548 product(bool, PrintPLAB, false, \
1549 "Print (survivor space) promotion LAB's sizing decisions") \
1550 \
1551 product(intx, ParGCArrayScanChunk, 50, \
1552 "Scan a subset of object array and push remainder, if array is " \
1553 "bigger than this") \
1554 \
1555 product(bool, ParGCUseLocalOverflow, false, \
1556 "Instead of a global overflow list, use local overflow stacks") \
1557 \
1558 product(bool, ParGCTrimOverflow, true, \
1559 "Eagerly trim the local overflow lists " \
1560 "(when ParGCUseLocalOverflow)") \
1561 \
1562 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1563 "Simulate work queue overflow in ParNew") \
1564 \
1565 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1566 "An `interval' counter that determines how frequently " \
1567 "we simulate overflow; a smaller number increases frequency") \
1568 \
1569 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1570 "The desired number of objects to claim from the overflow list") \
1571 \
1572 diagnostic(uintx, ParGCStridesPerThread, 2, \
1573 "The number of strides per worker thread that we divide up the " \
1574 "card table scanning work into") \
1575 \
1576 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
1577 "The number of cards in each chunk of the parallel chunks used " \
1578 "during card table scanning") \
1579 \
1580 product(uintx, CMSParPromoteBlocksToClaim, 16, \
1581 "Number of blocks to attempt to claim when refilling CMS LAB's " \
1582 "for parallel GC") \
1583 \
1584 product(uintx, OldPLABWeight, 50, \
1585 "Percentage (0-100) used to weight the current sample when " \
1586 "computing exponentially decaying average for resizing " \
1587 "CMSParPromoteBlocksToClaim") \
1588 \
1589 product(bool, ResizeOldPLAB, true, \
1590 "Dynamically resize (old gen) promotion LAB's") \
1591 \
1592 product(bool, PrintOldPLAB, false, \
1593 "Print (old gen) promotion LAB's sizing decisions") \
1594 \
1595 product(uintx, CMSOldPLABMin, 16, \
1596 "Minimum size of CMS gen promotion LAB caches per worker " \
1597 "per block size") \
1598 \
1599 product(uintx, CMSOldPLABMax, 1024, \
1600 "Maximum size of CMS gen promotion LAB caches per worker " \
1601 "per block size") \
1602 \
1603 product(uintx, CMSOldPLABNumRefills, 4, \
1604 "Nominal number of refills of CMS gen promotion LAB cache " \
1605 "per worker per block size") \
1606 \
1607 product(bool, CMSOldPLABResizeQuicker, false, \
1608 "React on-the-fly during a scavenge to a sudden " \
1609 "change in block demand rate") \
1610 \
1611 product(uintx, CMSOldPLABToleranceFactor, 4, \
1612 "The tolerance of the phase-change detector for on-the-fly " \
1613 "PLAB resizing during a scavenge") \
1614 \
1615 product(uintx, CMSOldPLABReactivityFactor, 2, \
1616 "The gain in the feedback loop for on-the-fly PLAB resizing " \
1617 "during a scavenge") \
1618 \
1619 product(bool, AlwaysPreTouch, false, \
1620 "Force all freshly committed pages to be pre-touched") \
1621 \
1622 product_pd(uintx, CMSYoungGenPerWorker, \
1623 "The maximum size of young gen chosen by default per GC worker " \
1624 "thread available") \
1625 \
1626 product(bool, CMSIncrementalMode, false, \
1627 "Whether CMS GC should operate in \"incremental\" mode") \
1628 \
1629 product(uintx, CMSIncrementalDutyCycle, 10, \
1630 "Percentage (0-100) of CMS incremental mode duty cycle. If " \
1631 "CMSIncrementalPacing is enabled, then this is just the initial " \
1632 "value.") \
1633 \
1634 product(bool, CMSIncrementalPacing, true, \
1635 "Whether the CMS incremental mode duty cycle should be " \
1636 "automatically adjusted") \
1637 \
1638 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1639 "Minimum percentage (0-100) of the CMS incremental duty cycle " \
1640 "used when CMSIncrementalPacing is enabled") \
1641 \
1642 product(uintx, CMSIncrementalSafetyFactor, 10, \
1643 "Percentage (0-100) used to add conservatism when computing the " \
1644 "duty cycle") \
1645 \
1646 product(uintx, CMSIncrementalOffset, 0, \
1647 "Percentage (0-100) by which the CMS incremental mode duty cycle "\
1648 "is shifted to the right within the period between young GCs") \
1649 \
1650 product(uintx, CMSExpAvgFactor, 50, \
1651 "Percentage (0-100) used to weigh the current sample when " \
1652 "computing exponential averages for CMS statistics") \
1653 \
1654 product(uintx, CMS_FLSWeight, 75, \
1655 "Percentage (0-100) used to weigh the current sample when " \
1656 "computing exponentially decaying averages for CMS FLS " \
1657 "statistics") \
1658 \
1659 product(uintx, CMS_FLSPadding, 1, \
1660 "The multiple of deviation from mean to use for buffering " \
1661 "against volatility in free list demand") \
1662 \
1663 product(uintx, FLSCoalescePolicy, 2, \
1664 "CMS: aggressiveness level for coalescing, increasing " \
1665 "from 0 to 4") \
1666 \
1667 product(bool, FLSAlwaysCoalesceLarge, false, \
1668 "CMS: larger free blocks are always available for coalescing") \
1669 \
1670 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1671 "CMS: the smaller the percentage the greater the coalescing " \
1672 "force") \
1673 \
1674 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1675 "CMS: the factor by which to inflate estimated demand of small " \
1676 "block sizes to prevent coalescing with an adjoining block") \
1677 \
1678 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1679 "CMS: the factor by which to inflate estimated demand of large " \
1680 "block sizes to prevent coalescing with an adjoining block") \
1681 \
1682 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1683 "CMS: the factor by which to inflate estimated demand of small " \
1684 "block sizes to prevent splitting to supply demand for smaller " \
1685 "blocks") \
1686 \
1687 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1688 "CMS: the factor by which to inflate estimated demand of large " \
1689 "block sizes to prevent splitting to supply demand for smaller " \
1690 "blocks") \
1691 \
1692 product(bool, CMSExtrapolateSweep, false, \
1693 "CMS: cushion for block demand during sweep") \
1694 \
1695 product(uintx, CMS_SweepWeight, 75, \
1696 "Percentage (0-100) used to weight the current sample when " \
1697 "computing exponentially decaying average for inter-sweep " \
1698 "duration") \
1699 \
1700 product(uintx, CMS_SweepPadding, 1, \
1701 "The multiple of deviation from mean to use for buffering " \
1702 "against volatility in inter-sweep duration") \
1703 \
1704 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1705 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1706 "duration exceeds this threshold in milliseconds") \
1707 \
1708 develop(bool, CMSTraceIncrementalMode, false, \
1709 "Trace CMS incremental mode") \
1710 \
1711 develop(bool, CMSTraceIncrementalPacing, false, \
1712 "Trace CMS incremental mode pacing computation") \
1713 \
1714 develop(bool, CMSTraceThreadState, false, \
1715 "Trace the CMS thread state (enable the trace_state() method)") \
1716 \
1717 product(bool, CMSClassUnloadingEnabled, true, \
1718 "Whether class unloading enabled when using CMS GC") \
1719 \
1720 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1721 "When CMS class unloading is enabled, the maximum CMS cycle " \
1722 "count for which classes may not be unloaded") \
1723 \
1724 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1725 "Compact when asked to collect CMS gen with " \
1726 "clear_all_soft_refs()") \
1727 \
1728 product(bool, UseCMSCompactAtFullCollection, true, \
1729 "Use Mark-Sweep-Compact algorithm at full collections") \
1730 \
1731 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1732 "Number of CMS full collection done before compaction if > 0") \
1733 \
1734 develop(intx, CMSDictionaryChoice, 0, \
1735 "Use BinaryTreeDictionary as default in the CMS generation") \
1736 \
1737 product(uintx, CMSIndexedFreeListReplenish, 4, \
1738 "Replenish an indexed free list with this number of chunks") \
1739 \
1740 product(bool, CMSReplenishIntermediate, true, \
1741 "Replenish all intermediate free-list caches") \
1742 \
1743 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1744 "When satisfying batched demand, split blocks from the " \
1745 "IndexedFreeList whose size is a multiple of requested size") \
1746 \
1747 product(bool, CMSLoopWarn, false, \
1748 "Warn in case of excessive CMS looping") \
1749 \
1750 develop(bool, CMSOverflowEarlyRestoration, false, \
1751 "Restore preserved marks early") \
1752 \
1753 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1754 "Size of marking stack") \
1755 \
1756 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1757 "Maximum size of marking stack") \
1758 \
1759 notproduct(bool, CMSMarkStackOverflowALot, false, \
1760 "Simulate frequent marking stack / work queue overflow") \
1761 \
1762 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1763 "An \"interval\" counter that determines how frequently " \
1764 "to simulate overflow; a smaller number increases frequency") \
1765 \
1766 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1767 "(Temporary, subject to experimentation) " \
1768 "Maximum number of abortable preclean iterations, if > 0") \
1769 \
1770 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1771 "(Temporary, subject to experimentation) " \
1772 "Maximum time in abortable preclean (in milliseconds)") \
1773 \
1774 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1775 "(Temporary, subject to experimentation) " \
1776 "Nominal minimum work per abortable preclean iteration") \
1777 \
1778 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
1779 "(Temporary, subject to experimentation) " \
1780 "Time that we sleep between iterations when not given " \
1781 "enough work per iteration") \
1782 \
1783 product(uintx, CMSRescanMultiple, 32, \
1784 "Size (in cards) of CMS parallel rescan task") \
1785 \
1786 product(uintx, CMSConcMarkMultiple, 32, \
1787 "Size (in cards) of CMS concurrent MT marking task") \
1788 \
1789 product(bool, CMSAbortSemantics, false, \
1790 "Whether abort-on-overflow semantics is implemented") \
1791 \
1792 product(bool, CMSParallelInitialMarkEnabled, true, \
1793 "Use the parallel initial mark.") \
1794 \
1795 product(bool, CMSParallelRemarkEnabled, true, \
1796 "Whether parallel remark enabled (only if ParNewGC)") \
1797 \
1798 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1799 "Whether parallel remark of survivor space " \
1800 "enabled (effective only if CMSParallelRemarkEnabled)") \
1801 \
1802 product(bool, CMSPLABRecordAlways, true, \
1803 "Always record survivor space PLAB boundaries (effective only " \
1804 "if CMSParallelSurvivorRemarkEnabled)") \
1805 \
1806 product(bool, CMSEdenChunksRecordAlways, true, \
1807 "Always record eden chunks used for the parallel initial mark " \
1808 "or remark of eden") \
1809 \
1810 product(bool, CMSPrintEdenSurvivorChunks, false, \
1811 "Print the eden and the survivor chunks used for the parallel " \
1812 "initial mark or remark of the eden/survivor spaces") \
1813 \
1814 product(bool, CMSConcurrentMTEnabled, true, \
1815 "Whether multi-threaded concurrent work enabled " \
1816 "(effective only if ParNewGC)") \
1817 \
1818 product(bool, CMSPrecleaningEnabled, true, \
1819 "Whether concurrent precleaning enabled") \
1820 \
1821 product(uintx, CMSPrecleanIter, 3, \
1822 "Maximum number of precleaning iteration passes") \
1823 \
1824 product(uintx, CMSPrecleanNumerator, 2, \
1825 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1826 "ratio") \
1827 \
1828 product(uintx, CMSPrecleanDenominator, 3, \
1829 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1830 "ratio") \
1831 \
1832 product(bool, CMSPrecleanRefLists1, true, \
1833 "Preclean ref lists during (initial) preclean phase") \
1834 \
1835 product(bool, CMSPrecleanRefLists2, false, \
1836 "Preclean ref lists during abortable preclean phase") \
1837 \
1838 product(bool, CMSPrecleanSurvivors1, false, \
1839 "Preclean survivors during (initial) preclean phase") \
1840 \
1841 product(bool, CMSPrecleanSurvivors2, true, \
1842 "Preclean survivors during abortable preclean phase") \
1843 \
1844 product(uintx, CMSPrecleanThreshold, 1000, \
1845 "Do not iterate again if number of dirty cards is less than this")\
1846 \
1847 product(bool, CMSCleanOnEnter, true, \
1848 "Clean-on-enter optimization for reducing number of dirty cards") \
1849 \
1850 product(uintx, CMSRemarkVerifyVariant, 1, \
1851 "Choose variant (1,2) of verification following remark") \
1852 \
1853 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1854 "If Eden size is below this, do not try to schedule remark") \
1855 \
1856 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1857 "The Eden occupancy percentage (0-100) at which " \
1858 "to try and schedule remark pause") \
1859 \
1860 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1861 "Start sampling eden top at least before young gen " \
1862 "occupancy reaches 1/<ratio> of the size at which " \
1863 "we plan to schedule remark") \
1864 \
1865 product(uintx, CMSSamplingGrain, 16*K, \
1866 "The minimum distance between eden samples for CMS (see above)") \
1867 \
1868 product(bool, CMSScavengeBeforeRemark, false, \
1869 "Attempt scavenge before the CMS remark step") \
1870 \
1871 develop(bool, CMSTraceSweeper, false, \
1872 "Trace some actions of the CMS sweeper") \
1873 \
1874 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1875 "Don't drain below this size per parallel worker/thief") \
1876 \
1877 manageable(intx, CMSWaitDuration, 2000, \
1878 "Time in milliseconds that CMS thread waits for young GC") \
1879 \
1880 develop(uintx, CMSCheckInterval, 1000, \
1881 "Interval in milliseconds that CMS thread checks if it " \
1882 "should start a collection cycle") \
1883 \
1884 product(bool, CMSYield, true, \
1885 "Yield between steps of CMS") \
1886 \
1887 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1888 "Bitmap operations should process at most this many bits " \
1889 "between yields") \
1890 \
1891 product(bool, CMSDumpAtPromotionFailure, false, \
1892 "Dump useful information about the state of the CMS old " \
1893 "generation upon a promotion failure") \
1894 \
1895 product(bool, CMSPrintChunksInDump, false, \
1896 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1897 "more detailed information about the free chunks") \
1898 \
1899 product(bool, CMSPrintObjectsInDump, false, \
1900 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1901 "more detailed information about the allocated objects") \
1902 \
1903 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1904 "Verify that all references across the FLS boundary " \
1905 "are to valid objects") \
1906 \
1907 diagnostic(bool, FLSVerifyLists, false, \
1908 "Do lots of (expensive) FreeListSpace verification") \
1909 \
1910 diagnostic(bool, FLSVerifyIndexTable, false, \
1911 "Do lots of (expensive) FLS index table verification") \
1912 \
1913 develop(bool, FLSVerifyDictionary, false, \
1914 "Do lots of (expensive) FLS dictionary verification") \
1915 \
1916 develop(bool, VerifyBlockOffsetArray, false, \
1917 "Do (expensive) block offset array verification") \
1918 \
1919 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
1920 "Maintain _unallocated_block in BlockOffsetArray " \
1921 "(currently applicable only to CMS collector)") \
1922 \
1923 develop(bool, TraceCMSState, false, \
1924 "Trace the state of the CMS collection") \
1925 \
1926 product(intx, RefDiscoveryPolicy, 0, \
1927 "Select type of reference discovery policy: " \
1928 "reference-based(0) or referent-based(1)") \
1929 \
1930 product(bool, ParallelRefProcEnabled, false, \
1931 "Enable parallel reference processing whenever possible") \
1932 \
1933 product(bool, ParallelRefProcBalancingEnabled, true, \
1934 "Enable balancing of reference processing queues") \
1935 \
1936 product(uintx, CMSTriggerRatio, 80, \
1937 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1938 "allocated before a CMS collection cycle commences") \
1939 \
1940 product(uintx, CMSBootstrapOccupancy, 50, \
1941 "Percentage CMS generation occupancy at which to " \
1942 "initiate CMS collection for bootstrapping collection stats") \
1943 \
1944 product(intx, CMSInitiatingOccupancyFraction, -1, \
1945 "Percentage CMS generation occupancy to start a CMS collection " \
1946 "cycle. A negative value means that CMSTriggerRatio is used") \
1947 \
1948 product(uintx, InitiatingHeapOccupancyPercent, 45, \
1949 "Percentage of the (entire) heap occupancy to start a " \
1950 "concurrent GC cycle. It is used by GCs that trigger a " \
1951 "concurrent GC cycle based on the occupancy of the entire heap, " \
1952 "not just one of the generations (e.g., G1). A value of 0 " \
1953 "denotes 'do constant GC cycles'.") \
1954 \
1955 manageable(intx, CMSTriggerInterval, -1, \
1956 "Commence a CMS collection cycle (at least) every so many " \
1957 "milliseconds (0 permanently, -1 disabled)") \
1958 \
1959 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1960 "Only use occupancy as a criterion for starting a CMS collection")\
1961 \
1962 product(uintx, CMSIsTooFullPercentage, 98, \
1963 "An absolute ceiling above which CMS will always consider the " \
1964 "unloading of classes when class unloading is enabled") \
1965 \
1966 develop(bool, CMSTestInFreeList, false, \
1967 "Check if the coalesced range is already in the " \
1968 "free lists as claimed") \
1969 \
1970 notproduct(bool, CMSVerifyReturnedBytes, false, \
1971 "Check that all the garbage collected was returned to the " \
1972 "free lists") \
1973 \
1974 notproduct(bool, ScavengeALot, false, \
1975 "Force scavenge at every Nth exit from the runtime system " \
1976 "(N=ScavengeALotInterval)") \
1977 \
1978 develop(bool, FullGCALot, false, \
1979 "Force full gc at every Nth exit from the runtime system " \
1980 "(N=FullGCALotInterval)") \
1981 \
1982 notproduct(bool, GCALotAtAllSafepoints, false, \
1983 "Enforce ScavengeALot/GCALot at all potential safepoints") \
1984 \
1985 product(bool, PrintPromotionFailure, false, \
1986 "Print additional diagnostic information following " \
1987 "promotion failure") \
1988 \
1989 notproduct(bool, PromotionFailureALot, false, \
1990 "Use promotion failure handling on every youngest generation " \
1991 "collection") \
1992 \
1993 develop(uintx, PromotionFailureALotCount, 1000, \
1994 "Number of promotion failures occurring at ParGCAllocBuffer " \
1995 "refill attempts (ParNew) or promotion attempts " \
1996 "(other young collectors)") \
1997 \
1998 develop(uintx, PromotionFailureALotInterval, 5, \
1999 "Total collections between promotion failures alot") \
2000 \
2001 experimental(uintx, WorkStealingSleepMillis, 1, \
2002 "Sleep time when sleep is used for yields") \
2003 \
2004 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \
2005 "Number of yields before a sleep is done during workstealing") \
2006 \
2007 experimental(uintx, WorkStealingHardSpins, 4096, \
2008 "Number of iterations in a spin loop between checks on " \
2009 "time out of hard spin") \
2010 \
2011 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \
2012 "Ratio of hard spins to calls to yield") \
2013 \
2014 develop(uintx, ObjArrayMarkingStride, 512, \
2015 "Number of object array elements to push onto the marking stack " \
2016 "before pushing a continuation entry") \
2017 \
2018 develop(bool, MetadataAllocationFailALot, false, \
2019 "Fail metadata allocations at intervals controlled by " \
2020 "MetadataAllocationFailALotInterval") \
2021 \
2022 develop(uintx, MetadataAllocationFailALotInterval, 1000, \
2023 "Metadata allocation failure a lot interval") \
2024 \
2025 develop(bool, TraceMetadataChunkAllocation, false, \
2026 "Trace chunk metadata allocations") \
2027 \
2028 product(bool, TraceMetadataHumongousAllocation, false, \
2029 "Trace humongous metadata allocations") \
2030 \
2031 develop(bool, TraceMetavirtualspaceAllocation, false, \
2032 "Trace virtual space metadata allocations") \
2033 \
2034 notproduct(bool, ExecuteInternalVMTests, false, \
2035 "Enable execution of internal VM tests") \
2036 \
2037 notproduct(bool, VerboseInternalVMTests, false, \
2038 "Turn on logging for internal VM tests.") \
2039 \
2040 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
2041 \
2042 product_pd(bool, ResizeTLAB, \
2043 "Dynamically resize TLAB size for threads") \
2044 \
2045 product(bool, ZeroTLAB, false, \
2046 "Zero out the newly created TLAB") \
2047 \
2048 product(bool, FastTLABRefill, true, \
2049 "Use fast TLAB refill code") \
2050 \
2051 product(bool, PrintTLAB, false, \
2052 "Print various TLAB related information") \
2053 \
2054 product(bool, TLABStats, true, \
2055 "Provide more detailed and expensive TLAB statistics " \
2056 "(with PrintTLAB)") \
2057 \
2058 product_pd(bool, NeverActAsServerClassMachine, \
2059 "Never act like a server-class machine") \
2060 \
2061 product(bool, AlwaysActAsServerClassMachine, false, \
2062 "Always act like a server-class machine") \
2063 \
2064 product_pd(uint64_t, MaxRAM, \
2065 "Real memory size (in bytes) used to set maximum heap size") \
2066 \
2067 product(bool, AggressiveHeap, false, \
2068 "Optimize heap options for long-running memory intensive apps") \
2069 \
2070 product(uintx, ErgoHeapSizeLimit, 0, \
2071 "Maximum ergonomically set heap size (in bytes); zero means use " \
2072 "MaxRAM * MaxRAMPercentage / 100") \
2073 \
2074 experimental(bool, UseCGroupMemoryLimitForHeap, false, \
2075 "Use CGroup memory limit as physical memory limit for heap " \
2076 "sizing" \
2077 "Deprecated, replaced by container support") \
2078 \
2079 diagnostic(bool, PrintContainerInfo, false, \
2080 "Print container related information") \
2081 \
2082 diagnostic(bool, PrintActiveCpus, false, \
2083 "Print the number of CPUs detected in os::active_processor_count") \
2084 \
2085 product(uintx, MaxRAMFraction, 4, \
2086 "Maximum fraction (1/n) of real memory used for maximum heap " \
2087 "size") \
2088 \
2089 product(uintx, DefaultMaxRAMFraction, 4, \
2090 "Maximum fraction (1/n) of real memory used for maximum heap " \
2091 "size; deprecated: to be renamed to MaxRAMFraction") \
2092 \
2093 product(uintx, MinRAMFraction, 2, \
2094 "Minimum fraction (1/n) of real memory used for maxmimum heap " \
2095 "size on systems with small physical memory size") \
2096 \
2097 product(uintx, InitialRAMFraction, 64, \
2098 "Fraction (1/n) of real memory used for initial heap size") \
2099 \
2100 product(double, MaxRAMPercentage, 25.0, \
2101 "Maximum percentage of real memory used for maximum heap size") \
2102 \
2103 product(double, MinRAMPercentage, 50.0, \
2104 "Minimum percentage of real memory used for maximum heap" \
2105 "size on systems with small physical memory size") \
2106 \
2107 product(double, InitialRAMPercentage, 1.5625, \
2108 "Percentage of real memory used for initial heap size") \
2109 \
2110 product(intx, ActiveProcessorCount, -1, \
2111 "Specify the CPU count the VM should use and report as active") \
2112 \
2113 develop(uintx, MaxVirtMemFraction, 2, \
2114 "Maximum fraction (1/n) of virtual memory used for ergonomically "\
2115 "determining maximum heap size") \
2116 \
2117 product(bool, UseAutoGCSelectPolicy, false, \
2118 "Use automatic collection selection policy") \
2119 \
2120 product(uintx, AutoGCSelectPauseMillis, 5000, \
2121 "Automatic GC selection pause threshold in milliseconds") \
2122 \
2123 product(bool, UseAdaptiveSizePolicy, true, \
2124 "Use adaptive generation sizing policies") \
2125 \
2126 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
2127 "Use adaptive survivor sizing policies") \
2128 \
2129 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
2130 "Use adaptive young-old sizing policies at minor collections") \
2131 \
2132 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
2133 "Use adaptive young-old sizing policies at major collections") \
2134 \
2135 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
2136 "Include statistics from System.gc() for adaptive size policy") \
2137 \
2138 product(bool, UseAdaptiveGCBoundary, false, \
2139 "Allow young-old boundary to move") \
2140 \
2141 develop(bool, TraceAdaptiveGCBoundary, false, \
2142 "Trace young-old boundary moves") \
2143 \
2144 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
2145 "Resize the virtual spaces of the young or old generations") \
2146 \
2147 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
2148 "Policy for changing generation size for throughput goals") \
2149 \
2150 product(uintx, AdaptiveSizePausePolicy, 0, \
2151 "Policy for changing generation size for pause goals") \
2152 \
2153 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
2154 "Adjust tenured generation to achieve a minor pause goal") \
2155 \
2156 develop(bool, PSAdjustYoungGenForMajorPause, false, \
2157 "Adjust young generation to achieve a major pause goal") \
2158 \
2159 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
2160 "Number of steps where heuristics is used before data is used") \
2161 \
2162 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
2163 "Number of collections before the adaptive sizing is started") \
2164 \
2165 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
2166 "Collection interval for printing information; zero means never") \
2167 \
2168 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
2169 "Use adaptive minimum footprint as a goal") \
2170 \
2171 product(uintx, AdaptiveSizePolicyWeight, 10, \
2172 "Weight given to exponential resizing, between 0 and 100") \
2173 \
2174 product(uintx, AdaptiveTimeWeight, 25, \
2175 "Weight given to time in adaptive policy, between 0 and 100") \
2176 \
2177 product(uintx, PausePadding, 1, \
2178 "How much buffer to keep for pause time") \
2179 \
2180 product(uintx, PromotedPadding, 3, \
2181 "How much buffer to keep for promotion failure") \
2182 \
2183 product(uintx, SurvivorPadding, 3, \
2184 "How much buffer to keep for survivor overflow") \
2185 \
2186 product(uintx, ThresholdTolerance, 10, \
2187 "Allowed collection cost difference between generations") \
2188 \
2189 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
2190 "If collection costs are within margin, reduce both by full " \
2191 "delta") \
2192 \
2193 product(uintx, YoungGenerationSizeIncrement, 20, \
2194 "Adaptive size percentage change in young generation") \
2195 \
2196 product(uintx, YoungGenerationSizeSupplement, 80, \
2197 "Supplement to YoungedGenerationSizeIncrement used at startup") \
2198 \
2199 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
2200 "Decay factor to YoungedGenerationSizeSupplement") \
2201 \
2202 product(uintx, TenuredGenerationSizeIncrement, 20, \
2203 "Adaptive size percentage change in tenured generation") \
2204 \
2205 product(uintx, TenuredGenerationSizeSupplement, 80, \
2206 "Supplement to TenuredGenerationSizeIncrement used at startup") \
2207 \
2208 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
2209 "Decay factor to TenuredGenerationSizeIncrement") \
2210 \
2211 product(uintx, MaxGCPauseMillis, max_uintx, \
2212 "Adaptive size policy maximum GC pause time goal in millisecond, "\
2213 "or (G1 Only) the maximum GC time per MMU time slice") \
2214 \
2215 product(uintx, GCPauseIntervalMillis, 0, \
2216 "Time slice for MMU specification") \
2217 \
2218 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
2219 "Adaptive size policy maximum GC minor pause time goal " \
2220 "in millisecond") \
2221 \
2222 product(uintx, GCTimeRatio, 99, \
2223 "Adaptive size policy application time to GC time ratio") \
2224 \
2225 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
2226 "Adaptive size scale down factor for shrinking") \
2227 \
2228 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
2229 "Adaptive size decays the major cost for long major intervals") \
2230 \
2231 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
2232 "Time scale over which major costs decay") \
2233 \
2234 product(uintx, MinSurvivorRatio, 3, \
2235 "Minimum ratio of young generation/survivor space size") \
2236 \
2237 product(uintx, InitialSurvivorRatio, 8, \
2238 "Initial ratio of young generation/survivor space size") \
2239 \
2240 product(uintx, BaseFootPrintEstimate, 256*M, \
2241 "Estimate of footprint other than Java Heap") \
2242 \
2243 product(bool, UseGCOverheadLimit, true, \
2244 "Use policy to limit of proportion of time spent in GC " \
2245 "before an OutOfMemory error is thrown") \
2246 \
2247 product(uintx, GCTimeLimit, 98, \
2248 "Limit of the proportion of time spent in GC before " \
2249 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \
2250 \
2251 product(uintx, GCHeapFreeLimit, 2, \
2252 "Minimum percentage of free space after a full GC before an " \
2253 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
2254 \
2255 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
2256 "Number of consecutive collections before gc time limit fires") \
2257 \
2258 product(bool, PrintAdaptiveSizePolicy, false, \
2259 "Print information about AdaptiveSizePolicy") \
2260 \
2261 product(intx, PrefetchCopyIntervalInBytes, -1, \
2262 "How far ahead to prefetch destination area (<= 0 means off)") \
2263 \
2264 product(intx, PrefetchScanIntervalInBytes, -1, \
2265 "How far ahead to prefetch scan area (<= 0 means off)") \
2266 \
2267 product(intx, PrefetchFieldsAhead, -1, \
2268 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2269 \
2270 diagnostic(bool, VerifySilently, false, \
2271 "Do not print the verification progress") \
2272 \
2273 diagnostic(bool, VerifyDuringStartup, false, \
2274 "Verify memory system before executing any Java code " \
2275 "during VM initialization") \
2276 \
2277 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2278 "Verify system before exiting") \
2279 \
2280 diagnostic(bool, VerifyBeforeGC, false, \
2281 "Verify memory system before GC") \
2282 \
2283 diagnostic(bool, VerifyAfterGC, false, \
2284 "Verify memory system after GC") \
2285 \
2286 diagnostic(bool, VerifyDuringGC, false, \
2287 "Verify memory system during GC (between phases)") \
2288 \
2289 diagnostic(ccstrlist, VerifySubSet, "", \
2290 "Memory sub-systems to verify when Verify*GC flag(s) " \
2291 "are enabled. One or more sub-systems can be specified " \
2292 "in a comma separated string. Sub-systems are: " \
2293 "threads, heap, symbol_table, string_table, codecache, " \
2294 "dictionary, classloader_data_graph, metaspace, jni_handles, " \
2295 "c-heap, codecache_oops") \
2296 \
2297 diagnostic(bool, GCParallelVerificationEnabled, true, \
2298 "Enable parallel memory system verification") \
2299 \
2300 diagnostic(bool, DeferInitialCardMark, false, \
2301 "When +ReduceInitialCardMarks, explicitly defer any that " \
2302 "may arise from new_pre_store_barrier") \
2303 \
2304 diagnostic(bool, VerifyRememberedSets, false, \
2305 "Verify GC remembered sets") \
2306 \
2307 diagnostic(bool, VerifyObjectStartArray, true, \
2308 "Verify GC object start array if verify before/after") \
2309 \
2310 product(bool, DisableExplicitGC, false, \
2311 "Ignore calls to System.gc()") \
2312 \
2313 notproduct(bool, CheckMemoryInitialization, false, \
2314 "Check memory initialization") \
2315 \
2316 product(bool, CollectGen0First, false, \
2317 "Collect youngest generation before each full GC") \
2318 \
2319 diagnostic(bool, BindCMSThreadToCPU, false, \
2320 "Bind CMS Thread to CPU if possible") \
2321 \
2322 diagnostic(uintx, CPUForCMSThread, 0, \
2323 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2324 \
2325 product(bool, BindGCTaskThreadsToCPUs, false, \
2326 "Bind GCTaskThreads to CPUs if possible") \
2327 \
2328 product(bool, UseGCTaskAffinity, false, \
2329 "Use worker affinity when asking for GCTasks") \
2330 \
2331 product(uintx, ProcessDistributionStride, 4, \
2332 "Stride through processors when distributing processes") \
2333 \
2334 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2335 "Number of times the coordinator GC thread will sleep while " \
2336 "yielding before giving up and resuming GC") \
2337 \
2338 product(uintx, CMSYieldSleepCount, 0, \
2339 "Number of times a GC thread (minus the coordinator) " \
2340 "will sleep while yielding before giving up and resuming GC") \
2341 \
2342 /* gc tracing */ \
2343 manageable(bool, PrintGC, false, \
2344 "Print message at garbage collection") \
2345 \
2346 manageable(bool, PrintGCDetails, false, \
2347 "Print more details at garbage collection") \
2348 \
2349 manageable(bool, PrintGCDateStamps, false, \
2350 "Print date stamps at garbage collection") \
2351 \
2352 manageable(bool, PrintGCTimeStamps, false, \
2353 "Print timestamps at garbage collection") \
2354 \
2355 manageable(bool, PrintGCID, false, \
2356 "Print an identifier for each garbage collection") \
2357 \
2358 product(bool, PrintGCTaskTimeStamps, false, \
2359 "Print timestamps for individual gc worker thread tasks") \
2360 \
2361 develop(intx, ConcGCYieldTimeout, 0, \
2362 "If non-zero, assert that GC threads yield within this " \
2363 "number of milliseconds") \
2364 \
2365 notproduct(bool, TraceMarkSweep, false, \
2366 "Trace mark sweep") \
2367 \
2368 product(bool, PrintReferenceGC, false, \
2369 "Print times spent handling reference objects during GC " \
2370 "(enabled only when PrintGCDetails)") \
2371 \
2372 develop(bool, TraceReferenceGC, false, \
2373 "Trace handling of soft/weak/final/phantom references") \
2374 \
2375 develop(bool, TraceFinalizerRegistration, false, \
2376 "Trace registration of final references") \
2377 \
2378 notproduct(bool, TraceScavenge, false, \
2379 "Trace scavenge") \
2380 \
2381 product(bool, IgnoreEmptyClassPaths, false, \
2382 "Ignore empty path elements in -classpath") \
2383 \
2384 product(bool, TraceClassPaths, false, \
2385 "Trace processing of class paths") \
2386 \
2387 product_rw(bool, TraceClassLoading, false, \
2388 "Trace all classes loaded") \
2389 \
2390 product(bool, TraceClassLoadingPreorder, false, \
2391 "Trace all classes loaded in order referenced (not loaded)") \
2392 \
2393 product_rw(bool, TraceClassUnloading, false, \
2394 "Trace unloading of classes") \
2395 \
2396 product_rw(bool, TraceLoaderConstraints, false, \
2397 "Trace loader constraints") \
2398 \
2399 develop(bool, TraceClassLoaderData, false, \
2400 "Trace class loader loader_data lifetime") \
2401 \
2402 product(uintx, InitialBootClassLoaderMetaspaceSize, \
2403 NOT_LP64(2200*K) LP64_ONLY(4*M), \
2404 "Initial size of the boot class loader data metaspace") \
2405 \
2406 product(bool, TraceGen0Time, false, \
2407 "Trace accumulated time for Gen 0 collection") \
2408 \
2409 product(bool, TraceGen1Time, false, \
2410 "Trace accumulated time for Gen 1 collection") \
2411 \
2412 product(bool, PrintTenuringDistribution, false, \
2413 "Print tenuring age information") \
2414 \
2415 product_rw(bool, PrintHeapAtGC, false, \
2416 "Print heap layout before and after each GC") \
2417 \
2418 product_rw(bool, PrintHeapAtGCExtended, false, \
2419 "Print extended information about the layout of the heap " \
2420 "when -XX:+PrintHeapAtGC is set") \
2421 \
2422 product(bool, PrintHeapAtSIGBREAK, true, \
2423 "Print heap layout in response to SIGBREAK") \
2424 \
2425 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
2426 "Print a class histogram before any major stop-world GC") \
2427 \
2428 manageable(bool, PrintClassHistogramAfterFullGC, false, \
2429 "Print a class histogram after any major stop-world GC") \
2430 \
2431 manageable(bool, PrintClassHistogram, false, \
2432 "Print a histogram of class instances") \
2433 \
2434 develop(bool, TraceWorkGang, false, \
2435 "Trace activities of work gangs") \
2436 \
2437 product(bool, TraceParallelOldGCTasks, false, \
2438 "Trace multithreaded GC activity") \
2439 \
2440 develop(bool, TraceBlockOffsetTable, false, \
2441 "Print BlockOffsetTable maps") \
2442 \
2443 develop(bool, TraceCardTableModRefBS, false, \
2444 "Print CardTableModRefBS maps") \
2445 \
2446 develop(bool, TraceGCTaskManager, false, \
2447 "Trace actions of the GC task manager") \
2448 \
2449 develop(bool, TraceGCTaskQueue, false, \
2450 "Trace actions of the GC task queues") \
2451 \
2452 diagnostic(bool, TraceGCTaskThread, false, \
2453 "Trace actions of the GC task threads") \
2454 \
2455 product(bool, PrintParallelOldGCPhaseTimes, false, \
2456 "Print the time taken by each phase in ParallelOldGC " \
2457 "(PrintGCDetails must also be enabled)") \
2458 \
2459 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2460 "Trace marking phase in ParallelOldGC") \
2461 \
2462 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2463 "Trace summary phase in ParallelOldGC") \
2464 \
2465 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2466 "Trace compaction phase in ParallelOldGC") \
2467 \
2468 develop(bool, TraceParallelOldGCDensePrefix, false, \
2469 "Trace dense prefix computation for ParallelOldGC") \
2470 \
2471 develop(bool, IgnoreLibthreadGPFault, false, \
2472 "Suppress workaround for libthread GP fault") \
2473 \
2474 product(bool, PrintJNIGCStalls, false, \
2475 "Print diagnostic message when GC is stalled " \
2476 "by JNI critical section") \
2477 \
2478 experimental(double, ObjectCountCutOffPercent, 0.5, \
2479 "The percentage of the used heap that the instances of a class " \
2480 "must occupy for the class to generate a trace event") \
2481 \
2482 /* GC log rotation setting */ \
2483 \
2484 product(bool, UseGCLogFileRotation, false, \
2485 "Rotate gclog files (for long running applications). It requires "\
2486 "-Xloggc:<filename>") \
2487 \
2488 product(uintx, NumberOfGCLogFiles, 0, \
2489 "Number of gclog files in rotation " \
2490 "(default: 0, no rotation)") \
2491 \
2492 product(uintx, GCLogFileSize, 8*K, \
2493 "GC log file size, requires UseGCLogFileRotation. " \
2494 "Set to 0 to only trigger rotation via jcmd") \
2495 \
2496 /* JVMTI heap profiling */ \
2497 \
2498 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2499 "Trace JVMTI object tagging calls") \
2500 \
2501 diagnostic(bool, VerifyBeforeIteration, false, \
2502 "Verify memory system before JVMTI iteration") \
2503 \
2504 /* compiler interface */ \
2505 \
2506 develop(bool, CIPrintCompilerName, false, \
2507 "when CIPrint is active, print the name of the active compiler") \
2508 \
2509 develop(bool, CIPrintCompileQueue, false, \
2510 "display the contents of the compile queue whenever a " \
2511 "compilation is enqueued") \
2512 \
2513 develop(bool, CIPrintRequests, false, \
2514 "display every request for compilation") \
2515 \
2516 product(bool, CITime, false, \
2517 "collect timing information for compilation") \
2518 \
2519 develop(bool, CITimeEach, false, \
2520 "display timing information after each successful compilation") \
2521 \
2522 develop(bool, CICountOSR, false, \
2523 "use a separate counter when assigning ids to osr compilations") \
2524 \
2525 develop(bool, CICompileNatives, true, \
2526 "compile native methods if supported by the compiler") \
2527 \
2528 develop_pd(bool, CICompileOSR, \
2529 "compile on stack replacement methods if supported by the " \
2530 "compiler") \
2531 \
2532 develop(bool, CIPrintMethodCodes, false, \
2533 "print method bytecodes of the compiled code") \
2534 \
2535 develop(bool, CIPrintTypeFlow, false, \
2536 "print the results of ciTypeFlow analysis") \
2537 \
2538 develop(bool, CITraceTypeFlow, false, \
2539 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2540 \
2541 develop(intx, OSROnlyBCI, -1, \
2542 "OSR only at this bci. Negative values mean exclude that bci") \
2543 \
2544 /* compiler */ \
2545 \
2546 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2547 "Number of compiler threads to run") \
2548 \
2549 product(intx, CompilationPolicyChoice, 0, \
2550 "which compilation policy (0/1)") \
2551 \
2552 develop(bool, UseStackBanging, true, \
2553 "use stack banging for stack overflow checks (required for " \
2554 "proper StackOverflow handling; disable only to measure cost " \
2555 "of stackbanging)") \
2556 \
2557 develop(bool, UseStrictFP, true, \
2558 "use strict fp if modifier strictfp is set") \
2559 \
2560 develop(bool, GenerateSynchronizationCode, true, \
2561 "generate locking/unlocking code for synchronized methods and " \
2562 "monitors") \
2563 \
2564 develop(bool, GenerateCompilerNullChecks, true, \
2565 "Generate explicit null checks for loads/stores/calls") \
2566 \
2567 develop(bool, GenerateRangeChecks, true, \
2568 "Generate range checks for array accesses") \
2569 \
2570 develop_pd(bool, ImplicitNullChecks, \
2571 "Generate code for implicit null checks") \
2572 \
2573 product_pd(bool, TrapBasedNullChecks, \
2574 "Generate code for null checks that uses a cmp and trap " \
2575 "instruction raising SIGTRAP. This is only used if an access to" \
2576 "null (+offset) will not raise a SIGSEGV, i.e.," \
2577 "ImplicitNullChecks don't work (PPC64).") \
2578 \
2579 product(bool, PrintSafepointStatistics, false, \
2580 "Print statistics about safepoint synchronization") \
2581 \
2582 product(intx, PrintSafepointStatisticsCount, 300, \
2583 "Total number of safepoint statistics collected " \
2584 "before printing them out") \
2585 \
2586 product(intx, PrintSafepointStatisticsTimeout, -1, \
2587 "Print safepoint statistics only when safepoint takes " \
2588 "more than PrintSafepointSatisticsTimeout in millis") \
2589 \
2590 product(bool, TraceSafepointCleanupTime, false, \
2591 "Print the break down of clean up tasks performed during " \
2592 "safepoint") \
2593 \
2594 product(bool, Inline, true, \
2595 "Enable inlining") \
2596 \
2597 product(bool, ClipInlining, true, \
2598 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \
2599 \
2600 develop(bool, UseCHA, true, \
2601 "Enable CHA") \
2602 \
2603 product(bool, UseTypeProfile, true, \
2604 "Check interpreter profile for historically monomorphic calls") \
2605 \
2606 notproduct(bool, TimeCompiler, false, \
2607 "Time the compiler") \
2608 \
2609 diagnostic(bool, PrintInlining, false, \
2610 "Print inlining optimizations") \
2611 \
2612 product(bool, UsePopCountInstruction, false, \
2613 "Use population count instruction") \
2614 \
2615 develop(bool, EagerInitialization, false, \
2616 "Eagerly initialize classes if possible") \
2617 \
2618 develop(bool, TraceMethodReplacement, false, \
2619 "Print when methods are replaced do to recompilation") \
2620 \
2621 develop(bool, PrintMethodFlushing, false, \
2622 "Print the nmethods being flushed") \
2623 \
2624 diagnostic(bool, PrintMethodFlushingStatistics, false, \
2625 "print statistics about method flushing") \
2626 \
2627 develop(bool, UseRelocIndex, false, \
2628 "Use an index to speed random access to relocations") \
2629 \
2630 develop(bool, StressCodeBuffers, false, \
2631 "Exercise code buffer expansion and other rare state changes") \
2632 \
2633 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2634 "Generate extra debugging information for non-safepoints in " \
2635 "nmethods") \
2636 \
2637 product(bool, PrintVMOptions, false, \
2638 "Print flags that appeared on the command line") \
2639 \
2640 product(bool, IgnoreUnrecognizedVMOptions, false, \
2641 "Ignore unrecognized VM options") \
2642 \
2643 product(bool, PrintCommandLineFlags, false, \
2644 "Print flags specified on command line or set by ergonomics") \
2645 \
2646 product(bool, PrintFlagsInitial, false, \
2647 "Print all VM flags before argument processing and exit VM") \
2648 \
2649 product(bool, PrintFlagsFinal, false, \
2650 "Print all VM flags after argument and ergonomic processing") \
2651 \
2652 notproduct(bool, PrintFlagsWithComments, false, \
2653 "Print all VM flags with default values and descriptions and " \
2654 "exit") \
2655 \
2656 diagnostic(bool, SerializeVMOutput, true, \
2657 "Use a mutex to serialize output to tty and LogFile") \
2658 \
2659 diagnostic(bool, DisplayVMOutput, true, \
2660 "Display all VM output on the tty, independently of LogVMOutput") \
2661 \
2662 diagnostic(bool, LogVMOutput, false, \
2663 "Save VM output to LogFile") \
2664 \
2665 diagnostic(ccstr, LogFile, NULL, \
2666 "If LogVMOutput or LogCompilation is on, save VM output to " \
2667 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
2668 \
2669 product(ccstr, ErrorFile, NULL, \
2670 "If an error occurs, save the error data to this file " \
2671 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2672 \
2673 product(bool, DisplayVMOutputToStderr, false, \
2674 "If DisplayVMOutput is true, display all VM output to stderr") \
2675 \
2676 product(bool, DisplayVMOutputToStdout, false, \
2677 "If DisplayVMOutput is true, display all VM output to stdout") \
2678 \
2679 product(bool, UseHeavyMonitors, false, \
2680 "use heavyweight instead of lightweight Java monitors") \
2681 \
2682 product(bool, PrintStringTableStatistics, false, \
2683 "print statistics about the StringTable and SymbolTable") \
2684 \
2685 diagnostic(bool, VerifyStringTableAtExit, false, \
2686 "verify StringTable contents at exit") \
2687 \
2688 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2689 "print histogram of the symbol table") \
2690 \
2691 notproduct(bool, ExitVMOnVerifyError, false, \
2692 "standard exit from VM if bytecode verify error " \
2693 "(only in debug mode)") \
2694 \
2695 notproduct(ccstr, AbortVMOnException, NULL, \
2696 "Call fatal if this exception is thrown. Example: " \
2697 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2698 \
2699 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \
2700 "Call fatal if the exception pointed by AbortVMOnException " \
2701 "has this message") \
2702 \
2703 develop(bool, DebugVtables, false, \
2704 "add debugging code to vtable dispatch") \
2705 \
2706 develop(bool, PrintVtables, false, \
2707 "print vtables when printing klass") \
2708 \
2709 notproduct(bool, PrintVtableStats, false, \
2710 "print vtables stats at end of run") \
2711 \
2712 develop(bool, TraceCreateZombies, false, \
2713 "trace creation of zombie nmethods") \
2714 \
2715 notproduct(bool, IgnoreLockingAssertions, false, \
2716 "disable locking assertions (for speed)") \
2717 \
2718 product(bool, RangeCheckElimination, true, \
2719 "Eliminate range checks") \
2720 \
2721 develop_pd(bool, UncommonNullCast, \
2722 "track occurrences of null in casts; adjust compiler tactics") \
2723 \
2724 develop(bool, TypeProfileCasts, true, \
2725 "treat casts like calls for purposes of type profiling") \
2726 \
2727 develop(bool, DelayCompilationDuringStartup, true, \
2728 "Delay invoking the compiler until main application class is " \
2729 "loaded") \
2730 \
2731 develop(bool, CompileTheWorld, false, \
2732 "Compile all methods in all classes in bootstrap class path " \
2733 "(stress test)") \
2734 \
2735 develop(bool, CompileTheWorldPreloadClasses, true, \
2736 "Preload all classes used by a class before start loading") \
2737 \
2738 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2739 "Force a safepoint every n compiles so sweeper can keep up") \
2740 \
2741 develop(bool, FillDelaySlots, true, \
2742 "Fill delay slots (on SPARC only)") \
2743 \
2744 develop(bool, TimeLivenessAnalysis, false, \
2745 "Time computation of bytecode liveness analysis") \
2746 \
2747 develop(bool, TraceLivenessGen, false, \
2748 "Trace the generation of liveness analysis information") \
2749 \
2750 notproduct(bool, TraceLivenessQuery, false, \
2751 "Trace queries of liveness analysis information") \
2752 \
2753 notproduct(bool, CollectIndexSetStatistics, false, \
2754 "Collect information about IndexSets") \
2755 \
2756 develop(bool, UseLoopSafepoints, true, \
2757 "Generate Safepoint nodes in every loop") \
2758 \
2759 develop(intx, FastAllocateSizeLimit, 128*K, \
2760 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2761 "Inline allocations larger than this in doublewords must go slow")\
2762 \
2763 product(bool, AggressiveOpts, false, \
2764 "Enable aggressive optimizations - see arguments.cpp") \
2765 \
2766 product_pd(uintx, TypeProfileLevel, \
2767 "=XYZ, with Z: Type profiling of arguments at call; " \
2768 "Y: Type profiling of return value at call; " \
2769 "X: Type profiling of parameters to methods; " \
2770 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \
2771 \
2772 product(intx, TypeProfileArgsLimit, 2, \
2773 "max number of call arguments to consider for type profiling") \
2774 \
2775 product(intx, TypeProfileParmsLimit, 2, \
2776 "max number of incoming parameters to consider for type profiling"\
2777 ", -1 for all") \
2778 \
2779 /* statistics */ \
2780 develop(bool, CountCompiledCalls, false, \
2781 "Count method invocations") \
2782 \
2783 notproduct(bool, CountRuntimeCalls, false, \
2784 "Count VM runtime calls") \
2785 \
2786 develop(bool, CountJNICalls, false, \
2787 "Count jni method invocations") \
2788 \
2789 notproduct(bool, CountJVMCalls, false, \
2790 "Count jvm method invocations") \
2791 \
2792 notproduct(bool, CountRemovableExceptions, false, \
2793 "Count exceptions that could be replaced by branches due to " \
2794 "inlining") \
2795 \
2796 notproduct(bool, ICMissHistogram, false, \
2797 "Produce histogram of IC misses") \
2798 \
2799 notproduct(bool, PrintClassStatistics, false, \
2800 "Print class statistics at end of run") \
2801 \
2802 notproduct(bool, PrintMethodStatistics, false, \
2803 "Print method statistics at end of run") \
2804 \
2805 /* interpreter */ \
2806 develop(bool, ClearInterpreterLocals, false, \
2807 "Always clear local variables of interpreter activations upon " \
2808 "entry") \
2809 \
2810 product_pd(bool, RewriteBytecodes, \
2811 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2812 \
2813 product_pd(bool, RewriteFrequentPairs, \
2814 "Rewrite frequently used bytecode pairs into a single bytecode") \
2815 \
2816 diagnostic(bool, PrintInterpreter, false, \
2817 "Print the generated interpreter code") \
2818 \
2819 product(bool, UseInterpreter, true, \
2820 "Use interpreter for non-compiled methods") \
2821 \
2822 develop(bool, UseFastSignatureHandlers, true, \
2823 "Use fast signature handlers for native calls") \
2824 \
2825 product(bool, UseLoopCounter, true, \
2826 "Increment invocation counter on backward branch") \
2827 \
2828 product(bool, UseFastEmptyMethods, true, \
2829 "Use fast method entry code for empty methods") \
2830 \
2831 product(bool, UseFastAccessorMethods, true, \
2832 "Use fast method entry code for accessor methods") \
2833 \
2834 product_pd(bool, UseOnStackReplacement, \
2835 "Use on stack replacement, calls runtime if invoc. counter " \
2836 "overflows in loop") \
2837 \
2838 notproduct(bool, TraceOnStackReplacement, false, \
2839 "Trace on stack replacement") \
2840 \
2841 product_pd(bool, PreferInterpreterNativeStubs, \
2842 "Use always interpreter stubs for native methods invoked via " \
2843 "interpreter") \
2844 \
2845 develop(bool, CountBytecodes, false, \
2846 "Count number of bytecodes executed") \
2847 \
2848 develop(bool, PrintBytecodeHistogram, false, \
2849 "Print histogram of the executed bytecodes") \
2850 \
2851 develop(bool, PrintBytecodePairHistogram, false, \
2852 "Print histogram of the executed bytecode pairs") \
2853 \
2854 diagnostic(bool, PrintSignatureHandlers, false, \
2855 "Print code generated for native method signature handlers") \
2856 \
2857 develop(bool, VerifyOops, false, \
2858 "Do plausibility checks for oops") \
2859 \
2860 develop(bool, CheckUnhandledOops, false, \
2861 "Check for unhandled oops in VM code") \
2862 \
2863 develop(bool, VerifyJNIFields, trueInDebug, \
2864 "Verify jfieldIDs for instance fields") \
2865 \
2866 notproduct(bool, VerifyJNIEnvThread, false, \
2867 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2868 "from JNI") \
2869 \
2870 develop(bool, VerifyFPU, false, \
2871 "Verify FPU state (check for NaN's, etc.)") \
2872 \
2873 develop(bool, VerifyThread, false, \
2874 "Watch the thread register for corruption (SPARC only)") \
2875 \
2876 develop(bool, VerifyActivationFrameSize, false, \
2877 "Verify that activation frame didn't become smaller than its " \
2878 "minimal size") \
2879 \
2880 develop(bool, TraceFrequencyInlining, false, \
2881 "Trace frequency based inlining") \
2882 \
2883 develop_pd(bool, InlineIntrinsics, \
2884 "Inline intrinsics that can be statically resolved") \
2885 \
2886 product_pd(bool, ProfileInterpreter, \
2887 "Profile at the bytecode level during interpretation") \
2888 \
2889 develop(bool, TraceProfileInterpreter, false, \
2890 "Trace profiling at the bytecode level during interpretation. " \
2891 "This outputs the profiling information collected to improve " \
2892 "jit compilation.") \
2893 \
2894 develop_pd(bool, ProfileTraps, \
2895 "Profile deoptimization traps at the bytecode level") \
2896 \
2897 product(intx, ProfileMaturityPercentage, 20, \
2898 "number of method invocations/branches (expressed as % of " \
2899 "CompileThreshold) before using the method's profile") \
2900 \
2901 develop(bool, PrintMethodData, false, \
2902 "Print the results of +ProfileInterpreter at end of run") \
2903 \
2904 develop(bool, VerifyDataPointer, trueInDebug, \
2905 "Verify the method data pointer during interpreter profiling") \
2906 \
2907 develop(bool, VerifyCompiledCode, false, \
2908 "Include miscellaneous runtime verifications in nmethod code; " \
2909 "default off because it disturbs nmethod size heuristics") \
2910 \
2911 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2912 "Manually make GC thread crash then dump java stack trace; " \
2913 "Test only") \
2914 \
2915 /* compilation */ \
2916 product(bool, UseCompiler, true, \
2917 "Use Just-In-Time compilation") \
2918 \
2919 develop(bool, TraceCompilationPolicy, false, \
2920 "Trace compilation policy") \
2921 \
2922 develop(bool, TimeCompilationPolicy, false, \
2923 "Time the compilation policy") \
2924 \
2925 product(bool, UseCounterDecay, true, \
2926 "Adjust recompilation counters") \
2927 \
2928 develop(intx, CounterHalfLifeTime, 30, \
2929 "Half-life time of invocation counters (in seconds)") \
2930 \
2931 develop(intx, CounterDecayMinIntervalLength, 500, \
2932 "The minimum interval (in milliseconds) between invocation of " \
2933 "CounterDecay") \
2934 \
2935 product(bool, AlwaysCompileLoopMethods, false, \
2936 "When using recompilation, never interpret methods " \
2937 "containing loops") \
2938 \
2939 product(bool, DontCompileHugeMethods, true, \
2940 "Do not compile methods > HugeMethodLimit") \
2941 \
2942 /* Bytecode escape analysis estimation. */ \
2943 product(bool, EstimateArgEscape, true, \
2944 "Analyze bytecodes to estimate escape state of arguments") \
2945 \
2946 product(intx, BCEATraceLevel, 0, \
2947 "How much tracing to do of bytecode escape analysis estimates") \
2948 \
2949 product(intx, MaxBCEAEstimateLevel, 5, \
2950 "Maximum number of nested calls that are analyzed by BC EA") \
2951 \
2952 product(intx, MaxBCEAEstimateSize, 150, \
2953 "Maximum bytecode size of a method to be analyzed by BC EA") \
2954 \
2955 product(intx, AllocatePrefetchStyle, 1, \
2956 "0 = no prefetch, " \
2957 "1 = prefetch instructions for each allocation, " \
2958 "2 = use TLAB watermark to gate allocation prefetch, " \
2959 "3 = use BIS instruction on Sparc for allocation prefetch") \
2960 \
2961 product(intx, AllocatePrefetchDistance, -1, \
2962 "Distance to prefetch ahead of allocation pointer") \
2963 \
2964 product(intx, AllocatePrefetchLines, 3, \
2965 "Number of lines to prefetch ahead of array allocation pointer") \
2966 \
2967 product(intx, AllocateInstancePrefetchLines, 1, \
2968 "Number of lines to prefetch ahead of instance allocation " \
2969 "pointer") \
2970 \
2971 product(intx, AllocatePrefetchStepSize, 16, \
2972 "Step size in bytes of sequential prefetch instructions") \
2973 \
2974 product(intx, AllocatePrefetchInstr, 0, \
2975 "Prefetch instruction to prefetch ahead of allocation pointer") \
2976 \
2977 /* deoptimization */ \
2978 develop(bool, TraceDeoptimization, false, \
2979 "Trace deoptimization") \
2980 \
2981 develop(bool, DebugDeoptimization, false, \
2982 "Tracing various information while debugging deoptimization") \
2983 \
2984 product(intx, SelfDestructTimer, 0, \
2985 "Will cause VM to terminate after a given time (in minutes) " \
2986 "(0 means off)") \
2987 \
2988 product(intx, MaxJavaStackTraceDepth, 1024, \
2989 "The maximum number of lines in the stack trace for Java " \
2990 "exceptions (0 means all)") \
2991 \
2992 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
2993 "Guarantee a safepoint (at least) every so many milliseconds " \
2994 "(0 means none)")) \
2995 \
2996 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \
2997 "Guarantee a safepoint (at least) every so many milliseconds " \
2998 "(0 means none)")) \
2999 \
3000 product(intx, SafepointTimeoutDelay, 10000, \
3001 "Delay in milliseconds for option SafepointTimeout") \
3002 \
3003 product(intx, NmethodSweepFraction, 16, \
3004 "Number of invocations of sweeper to cover all nmethods") \
3005 \
3006 product(intx, NmethodSweepCheckInterval, 5, \
3007 "Compilers wake up every n seconds to possibly sweep nmethods") \
3008 \
3009 product(intx, NmethodSweepActivity, 10, \
3010 "Removes cold nmethods from code cache if > 0. Higher values " \
3011 "result in more aggressive sweeping") \
3012 \
3013 notproduct(bool, LogSweeper, false, \
3014 "Keep a ring buffer of sweeper activity") \
3015 \
3016 notproduct(intx, SweeperLogEntries, 1024, \
3017 "Number of records in the ring buffer of sweeper activity") \
3018 \
3019 notproduct(intx, MemProfilingInterval, 500, \
3020 "Time between each invocation of the MemProfiler") \
3021 \
3022 develop(intx, MallocCatchPtr, -1, \
3023 "Hit breakpoint when mallocing/freeing this pointer") \
3024 \
3025 notproduct(intx, AssertRepeat, 1, \
3026 "number of times to evaluate expression in assert " \
3027 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
3028 \
3029 notproduct(ccstrlist, SuppressErrorAt, "", \
3030 "List of assertions (file:line) to muzzle") \
3031 \
3032 notproduct(uintx, HandleAllocationLimit, 1024, \
3033 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
3034 "is used") \
3035 \
3036 develop(uintx, TotalHandleAllocationLimit, 1024, \
3037 "Threshold for total handle allocation when " \
3038 "+TraceHandleAllocation is used") \
3039 \
3040 develop(intx, StackPrintLimit, 100, \
3041 "number of stack frames to print in VM-level stack dump") \
3042 \
3043 notproduct(intx, MaxElementPrintSize, 256, \
3044 "maximum number of elements to print") \
3045 \
3046 notproduct(intx, MaxSubklassPrintSize, 4, \
3047 "maximum number of subklasses to print when printing klass") \
3048 \
3049 product(intx, MaxInlineLevel, 9, \
3050 "maximum number of nested calls that are inlined") \
3051 \
3052 product(intx, MaxRecursiveInlineLevel, 1, \
3053 "maximum number of nested recursive calls that are inlined") \
3054 \
3055 develop(intx, MaxForceInlineLevel, 100, \
3056 "maximum number of nested calls that are forced for inlining " \
3057 "(using CompilerOracle or marked w/ @ForceInline)") \
3058 \
3059 product_pd(intx, InlineSmallCode, \
3060 "Only inline already compiled methods if their code size is " \
3061 "less than this") \
3062 \
3063 product(intx, MaxInlineSize, 35, \
3064 "The maximum bytecode size of a method to be inlined") \
3065 \
3066 product_pd(intx, FreqInlineSize, \
3067 "The maximum bytecode size of a frequent method to be inlined") \
3068 \
3069 product(intx, MaxTrivialSize, 6, \
3070 "The maximum bytecode size of a trivial method to be inlined") \
3071 \
3072 product(intx, MinInliningThreshold, 250, \
3073 "The minimum invocation count a method needs to have to be " \
3074 "inlined") \
3075 \
3076 develop(intx, MethodHistogramCutoff, 100, \
3077 "The cutoff value for method invocation histogram (+CountCalls)") \
3078 \
3079 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
3080 "Number of interpreted methods to show in profile") \
3081 \
3082 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
3083 "Number of compiled methods to show in profile") \
3084 \
3085 develop(intx, ProfilerNumberOfStubMethods, 25, \
3086 "Number of stub methods to show in profile") \
3087 \
3088 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
3089 "Number of runtime stub nodes to show in profile") \
3090 \
3091 product(intx, ProfileIntervalsTicks, 100, \
3092 "Number of ticks between printing of interval profile " \
3093 "(+ProfileIntervals)") \
3094 \
3095 notproduct(intx, ScavengeALotInterval, 1, \
3096 "Interval between which scavenge will occur with +ScavengeALot") \
3097 \
3098 notproduct(intx, FullGCALotInterval, 1, \
3099 "Interval between which full gc will occur with +FullGCALot") \
3100 \
3101 notproduct(intx, FullGCALotStart, 0, \
3102 "For which invocation to start FullGCAlot") \
3103 \
3104 notproduct(intx, FullGCALotDummies, 32*K, \
3105 "Dummy object allocated with +FullGCALot, forcing all objects " \
3106 "to move") \
3107 \
3108 develop(intx, DontYieldALotInterval, 10, \
3109 "Interval between which yields will be dropped (milliseconds)") \
3110 \
3111 develop(intx, MinSleepInterval, 1, \
3112 "Minimum sleep() interval (milliseconds) when " \
3113 "ConvertSleepToYield is off (used for Solaris)") \
3114 \
3115 develop(intx, ProfilerPCTickThreshold, 15, \
3116 "Number of ticks in a PC buckets to be a hotspot") \
3117 \
3118 notproduct(intx, DeoptimizeALotInterval, 5, \
3119 "Number of exits until DeoptimizeALot kicks in") \
3120 \
3121 notproduct(intx, ZombieALotInterval, 5, \
3122 "Number of exits until ZombieALot kicks in") \
3123 \
3124 diagnostic(intx, MallocVerifyInterval, 0, \
3125 "If non-zero, verify C heap after every N calls to " \
3126 "malloc/realloc/free") \
3127 \
3128 diagnostic(intx, MallocVerifyStart, 0, \
3129 "If non-zero, start verifying C heap after Nth call to " \
3130 "malloc/realloc/free") \
3131 \
3132 diagnostic(uintx, MallocMaxTestWords, 0, \
3133 "If non-zero, maximum number of words that malloc/realloc can " \
3134 "allocate (for testing only)") \
3135 \
3136 product(intx, TypeProfileWidth, 2, \
3137 "Number of receiver types to record in call/cast profile") \
3138 \
3139 develop(intx, BciProfileWidth, 2, \
3140 "Number of return bci's to record in ret profile") \
3141 \
3142 product(intx, PerMethodRecompilationCutoff, 400, \
3143 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3144 \
3145 product(intx, PerBytecodeRecompilationCutoff, 200, \
3146 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
3147 \
3148 product(intx, PerMethodTrapLimit, 100, \
3149 "Limit on traps (of one kind) in a method (includes inlines)") \
3150 \
3151 experimental(intx, PerMethodSpecTrapLimit, 5000, \
3152 "Limit on speculative traps (of one kind) in a method (includes inlines)") \
3153 \
3154 product(intx, PerBytecodeTrapLimit, 4, \
3155 "Limit on traps (of one kind) at a particular BCI") \
3156 \
3157 experimental(intx, SpecTrapLimitExtraEntries, 3, \
3158 "Extra method data trap entries for speculation") \
3159 \
3160 develop(intx, InlineFrequencyRatio, 20, \
3161 "Ratio of call site execution to caller method invocation") \
3162 \
3163 develop_pd(intx, InlineFrequencyCount, \
3164 "Count of call site execution necessary to trigger frequent " \
3165 "inlining") \
3166 \
3167 develop(intx, InlineThrowCount, 50, \
3168 "Force inlining of interpreted methods that throw this often") \
3169 \
3170 develop(intx, InlineThrowMaxSize, 200, \
3171 "Force inlining of throwing methods smaller than this") \
3172 \
3173 develop(intx, ProfilerNodeSize, 1024, \
3174 "Size in K to allocate for the Profile Nodes of each thread") \
3175 \
3176 product_pd(intx, PreInflateSpin, \
3177 "Number of times to spin wait before inflation") \
3178 \
3179 /* gc parameters */ \
3180 product(uintx, InitialHeapSize, 0, \
3181 "Initial heap size (in bytes); zero means use ergonomics") \
3182 \
3183 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \
3184 "Maximum heap size (in bytes)") \
3185 \
3186 product(uintx, OldSize, ScaleForWordSize(4*M), \
3187 "Initial tenured generation size (in bytes)") \
3188 \
3189 product(uintx, NewSize, ScaleForWordSize(1*M), \
3190 "Initial new generation size (in bytes)") \
3191 \
3192 product(uintx, MaxNewSize, max_uintx, \
3193 "Maximum new generation size (in bytes), max_uintx means set " \
3194 "ergonomically") \
3195 \
3196 product(uintx, PretenureSizeThreshold, 0, \
3197 "Maximum size in bytes of objects allocated in DefNew " \
3198 "generation; zero means no maximum") \
3199 \
3200 product(uintx, TLABSize, 0, \
3201 "Starting TLAB size (in bytes); zero means set ergonomically") \
3202 \
3203 product(uintx, MinTLABSize, 2*K, \
3204 "Minimum allowed TLAB size (in bytes)") \
3205 \
3206 product(uintx, TLABAllocationWeight, 35, \
3207 "Allocation averaging weight") \
3208 \
3209 product(uintx, TLABWasteTargetPercent, 1, \
3210 "Percentage of Eden that can be wasted") \
3211 \
3212 product(uintx, TLABRefillWasteFraction, 64, \
3213 "Maximum TLAB waste at a refill (internal fragmentation)") \
3214 \
3215 product(uintx, TLABWasteIncrement, 4, \
3216 "Increment allowed waste at slow allocation") \
3217 \
3218 product(uintx, SurvivorRatio, 8, \
3219 "Ratio of eden/survivor space size") \
3220 \
3221 product(uintx, NewRatio, 2, \
3222 "Ratio of old/new generation sizes") \
3223 \
3224 product_pd(uintx, NewSizeThreadIncrease, \
3225 "Additional size added to desired new generation size per " \
3226 "non-daemon thread (in bytes)") \
3227 \
3228 product_pd(uintx, MetaspaceSize, \
3229 "Initial size of Metaspaces (in bytes)") \
3230 \
3231 product(uintx, MaxMetaspaceSize, max_uintx, \
3232 "Maximum size of Metaspaces (in bytes)") \
3233 \
3234 product(uintx, CompressedClassSpaceSize, 1*G, \
3235 "Maximum size of class area in Metaspace when compressed " \
3236 "class pointers are used") \
3237 \
3238 manageable(uintx, MinHeapFreeRatio, 40, \
3239 "The minimum percentage of heap free after GC to avoid expansion."\
3240 " For most GCs this applies to the old generation. In G1 and" \
3241 " ParallelGC it applies to the whole heap.") \
3242 \
3243 manageable(uintx, MaxHeapFreeRatio, 70, \
3244 "The maximum percentage of heap free after GC to avoid shrinking."\
3245 " For most GCs this applies to the old generation. In G1 and" \
3246 " ParallelGC it applies to the whole heap.") \
3247 \
3248 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
3249 "Number of milliseconds per MB of free space in the heap") \
3250 \
3251 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
3252 "The minimum change in heap space due to GC (in bytes)") \
3253 \
3254 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \
3255 "The minimum expansion of Metaspace (in bytes)") \
3256 \
3257 product(uintx, MinMetaspaceFreeRatio, 40, \
3258 "The minimum percentage of Metaspace free after GC to avoid " \
3259 "expansion") \
3260 \
3261 product(uintx, MaxMetaspaceFreeRatio, 70, \
3262 "The maximum percentage of Metaspace free after GC to avoid " \
3263 "shrinking") \
3264 \
3265 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \
3266 "The maximum expansion of Metaspace without full GC (in bytes)") \
3267 \
3268 product(uintx, QueuedAllocationWarningCount, 0, \
3269 "Number of times an allocation that queues behind a GC " \
3270 "will retry before printing a warning") \
3271 \
3272 diagnostic(uintx, VerifyGCStartAt, 0, \
3273 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3274 \
3275 diagnostic(intx, VerifyGCLevel, 0, \
3276 "Generation level at which to start +VerifyBefore/AfterGC") \
3277 \
3278 product(uintx, MaxTenuringThreshold, 15, \
3279 "Maximum value for tenuring threshold") \
3280 \
3281 product(uintx, InitialTenuringThreshold, 7, \
3282 "Initial value for tenuring threshold") \
3283 \
3284 product(uintx, TargetSurvivorRatio, 50, \
3285 "Desired percentage of survivor space used after scavenge") \
3286 \
3287 product(uintx, MarkSweepDeadRatio, 5, \
3288 "Percentage (0-100) of the old gen allowed as dead wood. " \
3289 "Serial mark sweep treats this as both the minimum and maximum " \
3290 "value. " \
3291 "CMS uses this value only if it falls back to mark sweep. " \
3292 "Par compact uses a variable scale based on the density of the " \
3293 "generation and treats this as the maximum value when the heap " \
3294 "is either completely full or completely empty. Par compact " \
3295 "also has a smaller default value; see arguments.cpp.") \
3296 \
3297 product(uintx, MarkSweepAlwaysCompactCount, 4, \
3298 "How often should we fully compact the heap (ignoring the dead " \
3299 "space parameters)") \
3300 \
3301 product(intx, PrintCMSStatistics, 0, \
3302 "Statistics for CMS") \
3303 \
3304 product(bool, PrintCMSInitiationStatistics, false, \
3305 "Statistics for initiating a CMS collection") \
3306 \
3307 product(intx, PrintFLSStatistics, 0, \
3308 "Statistics for CMS' FreeListSpace") \
3309 \
3310 product(intx, PrintFLSCensus, 0, \
3311 "Census for CMS' FreeListSpace") \
3312 \
3313 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3314 "Delay between expansion and allocation (in milliseconds)") \
3315 \
3316 develop(uintx, GCWorkerDelayMillis, 0, \
3317 "Delay in scheduling GC workers (in milliseconds)") \
3318 \
3319 product(intx, DeferThrSuspendLoopCount, 4000, \
3320 "(Unstable) Number of times to iterate in safepoint loop " \
3321 "before blocking VM threads ") \
3322 \
3323 product(intx, DeferPollingPageLoopCount, -1, \
3324 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3325 "before changing safepoint polling page to RO ") \
3326 \
3327 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3328 \
3329 product(bool, PSChunkLargeArrays, true, \
3330 "Process large arrays in chunks") \
3331 \
3332 product(uintx, GCDrainStackTargetSize, 64, \
3333 "Number of entries we will try to leave on the stack " \
3334 "during parallel gc") \
3335 \
3336 /* stack parameters */ \
3337 product_pd(intx, StackYellowPages, \
3338 "Number of yellow zone (recoverable overflows) pages") \
3339 \
3340 product_pd(intx, StackRedPages, \
3341 "Number of red zone (unrecoverable overflows) pages") \
3342 \
3343 product_pd(intx, StackShadowPages, \
3344 "Number of shadow zone (for overflow checking) pages " \
3345 "this should exceed the depth of the VM and native call stack") \
3346 \
3347 product_pd(intx, ThreadStackSize, \
3348 "Thread Stack Size (in Kbytes)") \
3349 \
3350 product_pd(intx, VMThreadStackSize, \
3351 "Non-Java Thread Stack Size (in Kbytes)") \
3352 \
3353 product_pd(intx, CompilerThreadStackSize, \
3354 "Compiler Thread Stack Size (in Kbytes)") \
3355 \
3356 develop_pd(uintx, JVMInvokeMethodSlack, \
3357 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3358 \
3359 product(uintx, ThreadSafetyMargin, 50*M, \
3360 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
3361 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
3362 "disable this feature") \
3363 \
3364 /* code cache parameters */ \
3365 /* ppc64 has large code-entry alignment. */ \
3366 develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64), \
3367 "Code cache segment size (in bytes) - smallest unit of " \
3368 "allocation") \
3369 \
3370 develop_pd(intx, CodeEntryAlignment, \
3371 "Code entry alignment for generated code (in bytes)") \
3372 \
3373 product_pd(intx, OptoLoopAlignment, \
3374 "Align inner loops to zero relative to this modulus") \
3375 \
3376 product_pd(uintx, InitialCodeCacheSize, \
3377 "Initial code cache size (in bytes)") \
3378 \
3379 develop_pd(uintx, CodeCacheMinimumUseSpace, \
3380 "Minimum code cache size (in bytes) required to start VM.") \
3381 \
3382 product_pd(uintx, ReservedCodeCacheSize, \
3383 "Reserved code cache size (in bytes) - maximum code cache size") \
3384 \
3385 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
3386 "When less than X space left, we stop compiling") \
3387 \
3388 product_pd(uintx, CodeCacheExpansionSize, \
3389 "Code cache expansion size (in bytes)") \
3390 \
3391 develop_pd(uintx, CodeCacheMinBlockLength, \
3392 "Minimum number of segments in a code cache block") \
3393 \
3394 notproduct(bool, ExitOnFullCodeCache, false, \
3395 "Exit the VM if we fill the code cache") \
3396 \
3397 product(bool, UseCodeCacheFlushing, true, \
3398 "Remove cold/old nmethods from the code cache") \
3399 \
3400 /* interpreter debugging */ \
3401 develop(intx, BinarySwitchThreshold, 5, \
3402 "Minimal number of lookupswitch entries for rewriting to binary " \
3403 "switch") \
3404 \
3405 develop(intx, StopInterpreterAt, 0, \
3406 "Stop interpreter execution at specified bytecode number") \
3407 \
3408 develop(intx, TraceBytecodesAt, 0, \
3409 "Trace bytecodes starting with specified bytecode number") \
3410 \
3411 /* compiler interface */ \
3412 develop(intx, CIStart, 0, \
3413 "The id of the first compilation to permit") \
3414 \
3415 develop(intx, CIStop, max_jint, \
3416 "The id of the last compilation to permit") \
3417 \
3418 develop(intx, CIStartOSR, 0, \
3419 "The id of the first osr compilation to permit " \
3420 "(CICountOSR must be on)") \
3421 \
3422 develop(intx, CIStopOSR, max_jint, \
3423 "The id of the last osr compilation to permit " \
3424 "(CICountOSR must be on)") \
3425 \
3426 develop(intx, CIBreakAtOSR, -1, \
3427 "The id of osr compilation to break at") \
3428 \
3429 develop(intx, CIBreakAt, -1, \
3430 "The id of compilation to break at") \
3431 \
3432 product(ccstrlist, CompileOnly, "", \
3433 "List of methods (pkg/class.name) to restrict compilation to") \
3434 \
3435 product(ccstr, CompileCommandFile, NULL, \
3436 "Read compiler commands from this file [.hotspot_compiler]") \
3437 \
3438 product(ccstrlist, CompileCommand, "", \
3439 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3440 \
3441 develop(bool, ReplayCompiles, false, \
3442 "Enable replay of compilations from ReplayDataFile") \
3443 \
3444 product(ccstr, ReplayDataFile, NULL, \
3445 "File containing compilation replay information" \
3446 "[default: ./replay_pid%p.log] (%p replaced with pid)") \
3447 \
3448 product(ccstr, InlineDataFile, NULL, \
3449 "File containing inlining replay information" \
3450 "[default: ./inline_pid%p.log] (%p replaced with pid)") \
3451 \
3452 develop(intx, ReplaySuppressInitializers, 2, \
3453 "Control handling of class initialization during replay: " \
3454 "0 - don't do anything special; " \
3455 "1 - treat all class initializers as empty; " \
3456 "2 - treat class initializers for application classes as empty; " \
3457 "3 - allow all class initializers to run during bootstrap but " \
3458 " pretend they are empty after starting replay") \
3459 \
3460 develop(bool, ReplayIgnoreInitErrors, false, \
3461 "Ignore exceptions thrown during initialization for replay") \
3462 \
3463 product(bool, DumpReplayDataOnError, true, \
3464 "Record replay data for crashing compiler threads") \
3465 \
3466 product(bool, CICompilerCountPerCPU, false, \
3467 "1 compiler thread for log(N CPUs)") \
3468 \
3469 develop(intx, CIFireOOMAt, -1, \
3470 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3471 "(non-negative value throws OOM after this many CI accesses " \
3472 "in each compile)") \
3473 notproduct(intx, CICrashAt, -1, \
3474 "id of compilation to trigger assert in compiler thread for " \
3475 "the purpose of testing, e.g. generation of replay data") \
3476 notproduct(bool, CIObjectFactoryVerify, false, \
3477 "enable potentially expensive verification in ciObjectFactory") \
3478 \
3479 /* Priorities */ \
3480 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3481 \
3482 product(intx, ThreadPriorityPolicy, 0, \
3483 "0 : Normal. "\
3484 " VM chooses priorities that are appropriate for normal "\
3485 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3486 " to normal native priority. Java priorities below " \
3487 " NORM_PRIORITY map to lower native priority values. On "\
3488 " Windows applications are allowed to use higher native "\
3489 " priorities. However, with ThreadPriorityPolicy=0, VM will "\
3490 " not use the highest possible native priority, "\
3491 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\
3492 " system threads. On Linux thread priorities are ignored "\
3493 " because the OS does not support static priority in "\
3494 " SCHED_OTHER scheduling class which is the only choice for "\
3495 " non-root, non-realtime applications. "\
3496 "1 : Aggressive. "\
3497 " Java thread priorities map over to the entire range of "\
3498 " native thread priorities. Higher Java thread priorities map "\
3499 " to higher native thread priorities. This policy should be "\
3500 " used with care, as sometimes it can cause performance "\
3501 " degradation in the application and/or the entire system. On "\
3502 " Linux this policy requires root privilege.") \
3503 \
3504 product(bool, ThreadPriorityVerbose, false, \
3505 "Print priority changes") \
3506 \
3507 product(intx, DefaultThreadPriority, -1, \
3508 "The native priority at which threads run if not elsewhere " \
3509 "specified (-1 means no change)") \
3510 \
3511 product(intx, CompilerThreadPriority, -1, \
3512 "The native priority at which compiler threads should run " \
3513 "(-1 means no change)") \
3514 \
3515 product(intx, VMThreadPriority, -1, \
3516 "The native priority at which the VM thread should run " \
3517 "(-1 means no change)") \
3518 \
3519 product(bool, CompilerThreadHintNoPreempt, true, \
3520 "(Solaris only) Give compiler threads an extra quanta") \
3521 \
3522 product(bool, VMThreadHintNoPreempt, false, \
3523 "(Solaris only) Give VM thread an extra quanta") \
3524 \
3525 product(intx, JavaPriority1_To_OSPriority, -1, \
3526 "Map Java priorities to OS priorities") \
3527 \
3528 product(intx, JavaPriority2_To_OSPriority, -1, \
3529 "Map Java priorities to OS priorities") \
3530 \
3531 product(intx, JavaPriority3_To_OSPriority, -1, \
3532 "Map Java priorities to OS priorities") \
3533 \
3534 product(intx, JavaPriority4_To_OSPriority, -1, \
3535 "Map Java priorities to OS priorities") \
3536 \
3537 product(intx, JavaPriority5_To_OSPriority, -1, \
3538 "Map Java priorities to OS priorities") \
3539 \
3540 product(intx, JavaPriority6_To_OSPriority, -1, \
3541 "Map Java priorities to OS priorities") \
3542 \
3543 product(intx, JavaPriority7_To_OSPriority, -1, \
3544 "Map Java priorities to OS priorities") \
3545 \
3546 product(intx, JavaPriority8_To_OSPriority, -1, \
3547 "Map Java priorities to OS priorities") \
3548 \
3549 product(intx, JavaPriority9_To_OSPriority, -1, \
3550 "Map Java priorities to OS priorities") \
3551 \
3552 product(intx, JavaPriority10_To_OSPriority,-1, \
3553 "Map Java priorities to OS priorities") \
3554 \
3555 experimental(bool, UseCriticalJavaThreadPriority, false, \
3556 "Java thread priority 10 maps to critical scheduling priority") \
3557 \
3558 experimental(bool, UseCriticalCompilerThreadPriority, false, \
3559 "Compiler thread(s) run at critical scheduling priority") \
3560 \
3561 experimental(bool, UseCriticalCMSThreadPriority, false, \
3562 "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3563 \
3564 /* compiler debugging */ \
3565 notproduct(intx, CompileTheWorldStartAt, 1, \
3566 "First class to consider when using +CompileTheWorld") \
3567 \
3568 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3569 "Last class to consider when using +CompileTheWorld") \
3570 \
3571 develop(intx, NewCodeParameter, 0, \
3572 "Testing Only: Create a dedicated integer parameter before " \
3573 "putback") \
3574 \
3575 /* new oopmap storage allocation */ \
3576 develop(intx, MinOopMapAllocation, 8, \
3577 "Minimum number of OopMap entries in an OopMapSet") \
3578 \
3579 /* Background Compilation */ \
3580 develop(intx, LongCompileThreshold, 50, \
3581 "Used with +TraceLongCompiles") \
3582 \
3583 product(intx, StarvationMonitorInterval, 200, \
3584 "Pause between each check (in milliseconds)") \
3585 \
3586 /* recompilation */ \
3587 product_pd(intx, CompileThreshold, \
3588 "number of interpreted method invocations before (re-)compiling") \
3589 \
3590 product_pd(intx, BackEdgeThreshold, \
3591 "Interpreter Back edge threshold at which an OSR compilation is " \
3592 "invoked") \
3593 \
3594 product(intx, Tier0InvokeNotifyFreqLog, 7, \
3595 "Interpreter (tier 0) invocation notification frequency") \
3596 \
3597 product(intx, Tier2InvokeNotifyFreqLog, 11, \
3598 "C1 without MDO (tier 2) invocation notification frequency") \
3599 \
3600 product(intx, Tier3InvokeNotifyFreqLog, 10, \
3601 "C1 with MDO profiling (tier 3) invocation notification " \
3602 "frequency") \
3603 \
3604 product(intx, Tier23InlineeNotifyFreqLog, 20, \
3605 "Inlinee invocation (tiers 2 and 3) notification frequency") \
3606 \
3607 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
3608 "Interpreter (tier 0) invocation notification frequency") \
3609 \
3610 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
3611 "C1 without MDO (tier 2) invocation notification frequency") \
3612 \
3613 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
3614 "C1 with MDO profiling (tier 3) invocation notification " \
3615 "frequency") \
3616 \
3617 product(intx, Tier2CompileThreshold, 0, \
3618 "threshold at which tier 2 compilation is invoked") \
3619 \
3620 product(intx, Tier2BackEdgeThreshold, 0, \
3621 "Back edge threshold at which tier 2 compilation is invoked") \
3622 \
3623 product(intx, Tier3InvocationThreshold, 200, \
3624 "Compile if number of method invocations crosses this " \
3625 "threshold") \
3626 \
3627 product(intx, Tier3MinInvocationThreshold, 100, \
3628 "Minimum invocation to compile at tier 3") \
3629 \
3630 product(intx, Tier3CompileThreshold, 2000, \
3631 "Threshold at which tier 3 compilation is invoked (invocation " \
3632 "minimum must be satisfied") \
3633 \
3634 product(intx, Tier3BackEdgeThreshold, 60000, \
3635 "Back edge threshold at which tier 3 OSR compilation is invoked") \
3636 \
3637 product(intx, Tier4InvocationThreshold, 5000, \
3638 "Compile if number of method invocations crosses this " \
3639 "threshold") \
3640 \
3641 product(intx, Tier4MinInvocationThreshold, 600, \
3642 "Minimum invocation to compile at tier 4") \
3643 \
3644 product(intx, Tier4CompileThreshold, 15000, \
3645 "Threshold at which tier 4 compilation is invoked (invocation " \
3646 "minimum must be satisfied") \
3647 \
3648 product(intx, Tier4BackEdgeThreshold, 40000, \
3649 "Back edge threshold at which tier 4 OSR compilation is invoked") \
3650 \
3651 product(intx, Tier3DelayOn, 5, \
3652 "If C2 queue size grows over this amount per compiler thread " \
3653 "stop compiling at tier 3 and start compiling at tier 2") \
3654 \
3655 product(intx, Tier3DelayOff, 2, \
3656 "If C2 queue size is less than this amount per compiler thread " \
3657 "allow methods compiled at tier 2 transition to tier 3") \
3658 \
3659 product(intx, Tier3LoadFeedback, 5, \
3660 "Tier 3 thresholds will increase twofold when C1 queue size " \
3661 "reaches this amount per compiler thread") \
3662 \
3663 product(intx, Tier4LoadFeedback, 3, \
3664 "Tier 4 thresholds will increase twofold when C2 queue size " \
3665 "reaches this amount per compiler thread") \
3666 \
3667 product(intx, TieredCompileTaskTimeout, 50, \
3668 "Kill compile task if method was not used within " \
3669 "given timeout in milliseconds") \
3670 \
3671 product(intx, TieredStopAtLevel, 4, \
3672 "Stop at given compilation level") \
3673 \
3674 product(intx, Tier0ProfilingStartPercentage, 200, \
3675 "Start profiling in interpreter if the counters exceed tier 3 " \
3676 "thresholds by the specified percentage") \
3677 \
3678 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \
3679 "Increase the compile threshold for C1 compilation if the code " \
3680 "cache is filled by the specified percentage") \
3681 \
3682 product(intx, TieredRateUpdateMinTime, 1, \
3683 "Minimum rate sampling interval (in milliseconds)") \
3684 \
3685 product(intx, TieredRateUpdateMaxTime, 25, \
3686 "Maximum rate sampling interval (in milliseconds)") \
3687 \
3688 product_pd(bool, TieredCompilation, \
3689 "Enable tiered compilation") \
3690 \
3691 product(bool, PrintTieredEvents, false, \
3692 "Print tiered events notifications") \
3693 \
3694 product_pd(intx, OnStackReplacePercentage, \
3695 "NON_TIERED number of method invocations/branches (expressed as " \
3696 "% of CompileThreshold) before (re-)compiling OSR code") \
3697 \
3698 product(intx, InterpreterProfilePercentage, 33, \
3699 "NON_TIERED number of method invocations/branches (expressed as " \
3700 "% of CompileThreshold) before profiling in the interpreter") \
3701 \
3702 develop(intx, MaxRecompilationSearchLength, 10, \
3703 "The maximum number of frames to inspect when searching for " \
3704 "recompilee") \
3705 \
3706 develop(intx, MaxInterpretedSearchLength, 3, \
3707 "The maximum number of interpreted frames to skip when searching "\
3708 "for recompilee") \
3709 \
3710 develop(intx, DesiredMethodLimit, 8000, \
3711 "The desired maximum method size (in bytecodes) after inlining") \
3712 \
3713 develop(intx, HugeMethodLimit, 8000, \
3714 "Don't compile methods larger than this if " \
3715 "+DontCompileHugeMethods") \
3716 \
3717 /* New JDK 1.4 reflection implementation */ \
3718 \
3719 develop(bool, UseNewReflection, true, \
3720 "Temporary flag for transition to reflection based on dynamic " \
3721 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3722 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3723 "changes were needed") \
3724 \
3725 develop(bool, VerifyReflectionBytecodes, false, \
3726 "Force verification of 1.4 reflection bytecodes. Does not work " \
3727 "in situations like that described in 4486457 or for " \
3728 "constructors generated for serialization, so can not be enabled "\
3729 "in product.") \
3730 \
3731 product(bool, ReflectionWrapResolutionErrors, true, \
3732 "Temporary flag for transition to AbstractMethodError wrapped " \
3733 "in InvocationTargetException. See 6531596") \
3734 \
3735 develop(intx, FastSuperclassLimit, 8, \
3736 "Depth of hardwired instanceof accelerator array") \
3737 \
3738 /* Properties for Java libraries */ \
3739 \
3740 product(uintx, MaxDirectMemorySize, 0, \
3741 "Maximum total size of NIO direct-buffer allocations") \
3742 \
3743 /* temporary developer defined flags */ \
3744 \
3745 diagnostic(bool, UseNewCode, false, \
3746 "Testing Only: Use the new version while testing") \
3747 \
3748 diagnostic(bool, UseNewCode2, false, \
3749 "Testing Only: Use the new version while testing") \
3750 \
3751 diagnostic(bool, UseNewCode3, false, \
3752 "Testing Only: Use the new version while testing") \
3753 \
3754 /* flags for performance data collection */ \
3755 \
3756 product(bool, UsePerfData, falseInEmbedded, \
3757 "Flag to disable jvmstat instrumentation for performance testing "\
3758 "and problem isolation purposes") \
3759 \
3760 product(bool, PerfDataSaveToFile, false, \
3761 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3762 \
3763 product(ccstr, PerfDataSaveFile, NULL, \
3764 "Save PerfData memory to the specified absolute pathname. " \
3765 "The string %p in the file name (if present) " \
3766 "will be replaced by pid") \
3767 \
3768 product(intx, PerfDataSamplingInterval, 50, \
3769 "Data sampling interval (in milliseconds)") \
3770 \
3771 develop(bool, PerfTraceDataCreation, false, \
3772 "Trace creation of Performance Data Entries") \
3773 \
3774 develop(bool, PerfTraceMemOps, false, \
3775 "Trace PerfMemory create/attach/detach calls") \
3776 \
3777 product(bool, PerfDisableSharedMem, false, \
3778 "Store performance data in standard memory") \
3779 \
3780 product(intx, PerfDataMemorySize, 32*K, \
3781 "Size of performance data memory region. Will be rounded " \
3782 "up to a multiple of the native os page size.") \
3783 \
3784 product(intx, PerfMaxStringConstLength, 1024, \
3785 "Maximum PerfStringConstant string length before truncation") \
3786 \
3787 product(bool, PerfAllowAtExitRegistration, false, \
3788 "Allow registration of atexit() methods") \
3789 \
3790 product(bool, PerfBypassFileSystemCheck, false, \
3791 "Bypass Win32 file system criteria checks (Windows Only)") \
3792 \
3793 product(intx, UnguardOnExecutionViolation, 0, \
3794 "Unguard page and retry on no-execute fault (Win32 only) " \
3795 "0=off, 1=conservative, 2=aggressive") \
3796 \
3797 /* Serviceability Support */ \
3798 \
3799 product(bool, ManagementServer, false, \
3800 "Create JMX Management Server") \
3801 \
3802 product(bool, DisableAttachMechanism, false, \
3803 "Disable mechanism that allows tools to attach to this VM") \
3804 \
3805 product(bool, StartAttachListener, false, \
3806 "Always start Attach Listener at VM startup") \
3807 \
3808 manageable(bool, PrintConcurrentLocks, false, \
3809 "Print java.util.concurrent locks in thread dump") \
3810 \
3811 product(bool, TransmitErrorReport, false, \
3812 "Enable error report transmission on erroneous termination") \
3813 \
3814 product(ccstr, ErrorReportServer, NULL, \
3815 "Override built-in error report server address") \
3816 \
3817 /* Shared spaces */ \
3818 \
3819 product(bool, UseSharedSpaces, true, \
3820 "Use shared spaces for metadata") \
3821 \
3822 product(bool, VerifySharedSpaces, false, \
3823 "Verify shared spaces (false for default archive, true for " \
3824 "archive specified by -XX:SharedArchiveFile)") \
3825 \
3826 product(bool, RequireSharedSpaces, false, \
3827 "Require shared spaces for metadata") \
3828 \
3829 product(bool, DumpSharedSpaces, false, \
3830 "Special mode: JVM reads a class list, loads classes, builds " \
3831 "shared spaces, and dumps the shared spaces to a file to be " \
3832 "used in future JVM runs") \
3833 \
3834 product(bool, PrintSharedSpaces, false, \
3835 "Print usage of shared spaces") \
3836 \
3837 product(bool, PrintSharedArchiveAndExit, false, \
3838 "Print shared archive file contents") \
3839 \
3840 product(bool, PrintSharedDictionary, false, \
3841 "If PrintSharedArchiveAndExit is true, also print the shared " \
3842 "dictionary") \
3843 \
3844 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3845 "Size of read-write space for metadata (in bytes)") \
3846 \
3847 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3848 "Size of read-only space for metadata (in bytes)") \
3849 \
3850 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \
3851 "Size of the shared miscellaneous data area (in bytes)") \
3852 \
3853 product(uintx, SharedMiscCodeSize, 120*K, \
3854 "Size of the shared miscellaneous code area (in bytes)") \
3855 \
3856 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \
3857 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \
3858 "Address to allocate shared memory region for class data") \
3859 \
3860 diagnostic(bool, EnableInvokeDynamic, true, \
3861 "support JSR 292 (method handles, invokedynamic, " \
3862 "anonymous classes") \
3863 \
3864 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \
3865 "Do not quit -Xshare:dump even if we encounter unverifiable " \
3866 "classes. Just exclude them from the shared dictionary.") \
3867 \
3868 diagnostic(bool, PrintMethodHandleStubs, false, \
3869 "Print generated stub code for method handles") \
3870 \
3871 develop(bool, TraceMethodHandles, false, \
3872 "trace internal method handle operations") \
3873 \
3874 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
3875 "perform extra checks when constructing method handles") \
3876 \
3877 diagnostic(bool, ShowHiddenFrames, false, \
3878 "show method handle implementation frames (usually hidden)") \
3879 \
3880 experimental(bool, TrustFinalNonStaticFields, false, \
3881 "trust final non-static declarations for constant folding") \
3882 \
3883 diagnostic(bool, FoldStableValues, true, \
3884 "Optimize loads from stable fields (marked w/ @Stable)") \
3885 \
3886 develop(bool, TraceInvokeDynamic, false, \
3887 "trace internal invoke dynamic operations") \
3888 \
3889 diagnostic(bool, PauseAtStartup, false, \
3890 "Causes the VM to pause at startup time and wait for the pause " \
3891 "file to be removed (default: ./vm.paused.<pid>)") \
3892 \
3893 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3894 "The file to create and for whose removal to await when pausing " \
3895 "at startup. (default: ./vm.paused.<pid>)") \
3896 \
3897 diagnostic(bool, PauseAtExit, false, \
3898 "Pause and wait for keypress on exit if a debugger is attached") \
3899 \
3900 product(bool, ExtendedDTraceProbes, false, \
3901 "Enable performance-impacting dtrace probes") \
3902 \
3903 product(bool, DTraceMethodProbes, false, \
3904 "Enable dtrace probes for method-entry and method-exit") \
3905 \
3906 product(bool, DTraceAllocProbes, false, \
3907 "Enable dtrace probes for object allocation") \
3908 \
3909 product(bool, DTraceMonitorProbes, false, \
3910 "Enable dtrace probes for monitor events") \
3911 \
3912 product(bool, RelaxAccessControlCheck, false, \
3913 "Relax the access control checks in the verifier") \
3914 \
3915 diagnostic(bool, PrintDTraceDOF, false, \
3916 "Print the DTrace DOF passed to the system for JSDT probes") \
3917 \
3918 product(uintx, StringTableSize, defaultStringTableSize, \
3919 "Number of buckets in the interned String table") \
3920 \
3921 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \
3922 "Number of buckets in the JVM internal Symbol table") \
3923 \
3924 product(bool, UseStringDeduplication, false, \
3925 "Use string deduplication") \
3926 \
3927 product(bool, PrintStringDeduplicationStatistics, false, \
3928 "Print string deduplication statistics") \
3929 \
3930 product(uintx, StringDeduplicationAgeThreshold, 3, \
3931 "A string must reach this age (or be promoted to an old region) " \
3932 "to be considered for deduplication") \
3933 \
3934 diagnostic(bool, StringDeduplicationResizeALot, false, \
3935 "Force table resize every time the table is scanned") \
3936 \
3937 diagnostic(bool, StringDeduplicationRehashALot, false, \
3938 "Force table rehash every time the table is scanned") \
3939 \
3940 develop(bool, TraceDefaultMethods, false, \
3941 "Trace the default method processing steps") \
3942 \
3943 develop(bool, VerifyGenericSignatures, false, \
3944 "Abort VM on erroneous or inconsistent generic signatures") \
3945 \
3946 product(bool, UseVMInterruptibleIO, false, \
3947 "(Unstable, Solaris-specific) Thread interrupt before or with " \
3948 "EINTR for I/O operations results in OS_INTRPT. The default " \
3949 "value of this flag is true for JDK 6 and earlier") \
3950 \
3951 diagnostic(bool, WhiteBoxAPI, false, \
3952 "Enable internal testing APIs") \
3953 \
3954 product(bool, PrintGCCause, true, \
3955 "Include GC cause in GC logging") \
3956 \
3957 experimental(intx, SurvivorAlignmentInBytes, 0, \
3958 "Default survivor space alignment in bytes") \
3959 \
3960 product(bool , AllowNonVirtualCalls, false, \
3961 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \
3962 \
3963 product(ccstr, DumpLoadedClassList, NULL, \
3964 "Dump the names all loaded classes, that could be stored into " \
3965 "the CDS archive, in the specified file") \
3966 \
3967 product(ccstr, SharedClassListFile, NULL, \
3968 "Override the default CDS class list") \
3969 \
3970 diagnostic(ccstr, SharedArchiveFile, NULL, \
3971 "Override the default location of the CDS archive file") \
3972 \
3973 product(ccstr, ExtraSharedClassListFile, NULL, \
3974 "Extra classlist for building the CDS archive file") \
3975 \
3976 experimental(uintx, ArrayAllocatorMallocLimit, \
3977 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \
3978 "Allocation less than this value will be allocated " \
3979 "using malloc. Larger allocations will use mmap.") \
3980 \
3981 product(bool, EnableTracing, false, \
3982 "Enable event-based tracing") \
3983 \
3984 product(bool, UseLockedTracing, false, \
3985 "Use locked-tracing when doing event-based tracing") \
3986 \
3987 product_pd(bool, PreserveFramePointer, \
3988 "Use the FP register for holding the frame pointer " \
3989 "and not as a general purpose register.")
3990
3991 /*
3992 * Macros for factoring of globals
3993 */
3994
3995 // Interface macros
3996 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3997 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
3998 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3999 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
4000 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
4001 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
4002 #ifdef PRODUCT
4003 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value;
4004 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name;
4005 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name;
4006 #else
4007 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
4008 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
4009 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4010 #endif
4011 // Special LP64 flags, product only needed for now.
4012 #ifdef _LP64
4013 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4014 #else
4015 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
4016 #endif // _LP64
4017
4018 // Implementation macros
4019 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
4020 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
4021 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
4022 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
4023 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
4024 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
4025 #ifdef PRODUCT
4026 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value;
4027 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name;
4028 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value;
4029 #else
4030 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
4031 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
4032 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
4033 #endif
4034 #ifdef _LP64
4035 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
4036 #else
4037 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
4038 #endif // _LP64
4039
4040 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)
4041
4042 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
4043
4044 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
4045
4046 // Extensions
4047
4048 #include "runtime/globals_ext.hpp"
4049
4050 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP