1 /*
2 * Copyright (c) 1997, 2019, 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 #if !INCLUDE_JFR
208 #define LogJFR false
209 #endif
210
211 // string type aliases used only in this file
212 typedef const char* ccstr;
213 typedef const char* ccstrlist; // represents string arguments which accumulate
214
215 struct Flag {
216 enum Flags {
217 // value origin
218 DEFAULT = 0,
219 COMMAND_LINE = 1,
220 ENVIRON_VAR = 2,
221 CONFIG_FILE = 3,
222 MANAGEMENT = 4,
223 ERGONOMIC = 5,
224 ATTACH_ON_DEMAND = 6,
225 INTERNAL = 7,
226
227 LAST_VALUE_ORIGIN = INTERNAL,
228 VALUE_ORIGIN_BITS = 4,
229 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
230
231 // flag kind
232 KIND_PRODUCT = 1 << 4,
233 KIND_MANAGEABLE = 1 << 5,
234 KIND_DIAGNOSTIC = 1 << 6,
235 KIND_EXPERIMENTAL = 1 << 7,
236 KIND_NOT_PRODUCT = 1 << 8,
237 KIND_DEVELOP = 1 << 9,
238 KIND_PLATFORM_DEPENDENT = 1 << 10,
239 KIND_READ_WRITE = 1 << 11,
240 KIND_C1 = 1 << 12,
241 KIND_C2 = 1 << 13,
242 KIND_ARCH = 1 << 14,
243 KIND_SHARK = 1 << 15,
244 KIND_LP64_PRODUCT = 1 << 16,
245 KIND_COMMERCIAL = 1 << 17,
246
247 KIND_MASK = ~VALUE_ORIGIN_MASK
248 };
249
250 const char* _type;
251 const char* _name;
252 void* _addr;
253 NOT_PRODUCT(const char* _doc;)
254 Flags _flags;
255
256 // points to all Flags static array
257 static Flag* flags;
258
259 // number of flags
260 static size_t numFlags;
261
262 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false);
263 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
264
265 void check_writable();
266
267 bool is_bool() const;
268 bool get_bool() const;
269 void set_bool(bool value);
270
271 bool is_intx() const;
272 intx get_intx() const;
273 void set_intx(intx value);
274
275 bool is_uintx() const;
276 uintx get_uintx() const;
277 void set_uintx(uintx value);
278
279 bool is_uint64_t() const;
280 uint64_t get_uint64_t() const;
281 void set_uint64_t(uint64_t value);
282
283 bool is_double() const;
284 double get_double() const;
285 void set_double(double value);
286
287 bool is_ccstr() const;
288 bool ccstr_accumulates() const;
289 ccstr get_ccstr() const;
290 void set_ccstr(ccstr value);
291
292 Flags get_origin();
293 void set_origin(Flags origin);
294
295 bool is_default();
296 bool is_ergonomic();
297 bool is_command_line();
298
299 bool is_product() const;
300 bool is_manageable() const;
301 bool is_diagnostic() const;
302 bool is_experimental() const;
303 bool is_notproduct() const;
304 bool is_develop() const;
305 bool is_read_write() const;
306 bool is_commercial() const;
307
308 bool is_constant_in_binary() const;
309
310 bool is_unlocker() const;
311 bool is_unlocked() const;
312 bool is_writeable() const;
313 bool is_external() const;
314
315 bool is_unlocker_ext() const;
316 bool is_unlocked_ext() const;
317 bool is_writeable_ext() const;
318 bool is_external_ext() const;
319
320 void unlock_diagnostic();
321
322 void get_locked_message(char*, int) const;
323 void get_locked_message_ext(char*, int) const;
324
325 void print_on(outputStream* st, bool withComments = false );
326 void print_kind(outputStream* st);
327 void print_as_flag(outputStream* st);
328 };
329
330 // debug flags control various aspects of the VM and are global accessible
331
332 // use FlagSetting to temporarily change some debug flag
333 // e.g. FlagSetting fs(DebugThisAndThat, true);
334 // restored to previous value upon leaving scope
335 class FlagSetting {
336 bool val;
337 bool* flag;
338 public:
339 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
340 ~FlagSetting() { *flag = val; }
341 };
342
343
344 class CounterSetting {
345 intx* counter;
346 public:
347 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
348 ~CounterSetting() { (*counter)--; }
349 };
350
351
352 class UIntFlagSetting {
353 uintx val;
354 uintx* flag;
355 public:
356 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
357 ~UIntFlagSetting() { *flag = val; }
358 };
359
360
361 class DoubleFlagSetting {
362 double val;
363 double* flag;
364 public:
365 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
366 ~DoubleFlagSetting() { *flag = val; }
367 };
368
369
370 class CommandLineFlags {
371 public:
372 static bool boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false);
373 static bool boolAt(const char* name, bool* value, bool allow_locked = false, bool return_flag = false) { return boolAt(name, strlen(name), value, allow_locked, return_flag); }
374 static bool boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin);
375 static bool boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); }
376
377 static bool intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false);
378 static bool intxAt(const char* name, intx* value, bool allow_locked = false, bool return_flag = false) { return intxAt(name, strlen(name), value, allow_locked, return_flag); }
379 static bool intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin);
380 static bool intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); }
381
382 static bool uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false);
383 static bool uintxAt(const char* name, uintx* value, bool allow_locked = false, bool return_flag = false) { return uintxAt(name, strlen(name), value, allow_locked, return_flag); }
384 static bool uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin);
385 static bool uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
386
387 static bool uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false);
388 static bool uint64_tAt(const char* name, uint64_t* value, bool allow_locked = false, bool return_flag = false) { return uint64_tAt(name, strlen(name), value, allow_locked, return_flag); }
389 static bool uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin);
390 static bool uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
391
392 static bool doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false);
393 static bool doubleAt(const char* name, double* value, bool allow_locked = false, bool return_flag = false) { return doubleAt(name, strlen(name), value, allow_locked, return_flag); }
394 static bool doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin);
395 static bool doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
396
397 static bool ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false);
398 static bool ccstrAt(const char* name, ccstr* value, bool allow_locked = false, bool return_flag = false) { return ccstrAt(name, strlen(name), value, allow_locked, return_flag); }
399 // Contract: Flag will make private copy of the incoming value.
400 // Outgoing value is always malloc-ed, and caller MUST call free.
401 static bool ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin);
402 static bool ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
403
404 // Returns false if name is not a command line flag.
405 static bool wasSetOnCmdline(const char* name, bool* value);
406 static void printSetFlags(outputStream* out);
407
408 static void printFlags(outputStream* out, bool withComments);
409
410 static void verify() PRODUCT_RETURN;
411 };
412
413 // use this for flags that are true by default in the debug version but
414 // false in the optimized version, and vice versa
415 #ifdef ASSERT
416 #define trueInDebug true
417 #define falseInDebug false
418 #else
419 #define trueInDebug false
420 #define falseInDebug true
421 #endif
422
423 // use this for flags that are true per default in the product build
424 // but false in development builds, and vice versa
425 #ifdef PRODUCT
426 #define trueInProduct true
427 #define falseInProduct false
428 #else
429 #define trueInProduct false
430 #define falseInProduct true
431 #endif
432
433 #ifdef JAVASE_EMBEDDED
434 #define falseInEmbedded false
435 #else
436 #define falseInEmbedded true
437 #endif
438
439 // develop flags are settable / visible only during development and are constant in the PRODUCT version
440 // product flags are always settable / visible
441 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
442
443 // A flag must be declared with one of the following types:
444 // bool, intx, uintx, ccstr.
445 // The type "ccstr" is an alias for "const char*" and is used
446 // only in this file, because the macrology requires single-token type names.
447
448 // Note: Diagnostic options not meant for VM tuning or for product modes.
449 // They are to be used for VM quality assurance or field diagnosis
450 // of VM bugs. They are hidden so that users will not be encouraged to
451 // try them as if they were VM ordinary execution options. However, they
452 // are available in the product version of the VM. Under instruction
453 // from support engineers, VM customers can turn them on to collect
454 // diagnostic information about VM problems. To use a VM diagnostic
455 // option, you must first specify +UnlockDiagnosticVMOptions.
456 // (This master switch also affects the behavior of -Xprintflags.)
457 //
458 // experimental flags are in support of features that are not
459 // part of the officially supported product, but are available
460 // for experimenting with. They could, for example, be performance
461 // features that may not have undergone full or rigorous QA, but which may
462 // help performance in some cases and released for experimentation
463 // by the community of users and developers. This flag also allows one to
464 // be able to build a fully supported product that nonetheless also
465 // ships with some unsupported, lightly tested, experimental features.
466 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
467 // UnlockExperimentalVMOptions flag, which allows the control and
468 // modification of the experimental flags.
469 //
470 // Nota bene: neither diagnostic nor experimental options should be used casually,
471 // and they are not supported on production loads, except under explicit
472 // direction from support engineers.
473 //
474 // manageable flags are writeable external product flags.
475 // They are dynamically writeable through the JDK management interface
476 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
477 // These flags are external exported interface (see CCC). The list of
478 // manageable flags can be queried programmatically through the management
479 // interface.
480 //
481 // A flag can be made as "manageable" only if
482 // - the flag is defined in a CCC as an external exported interface.
483 // - the VM implementation supports dynamic setting of the flag.
484 // This implies that the VM must *always* query the flag variable
485 // and not reuse state related to the flag state at any given time.
486 // - you want the flag to be queried programmatically by the customers.
487 //
488 // product_rw flags are writeable internal product flags.
489 // They are like "manageable" flags but for internal/private use.
490 // The list of product_rw flags are internal/private flags which
491 // may be changed/removed in a future release. It can be set
492 // through the management interface to get/set value
493 // when the name of flag is supplied.
494 //
495 // A flag can be made as "product_rw" only if
496 // - the VM implementation supports dynamic setting of the flag.
497 // This implies that the VM must *always* query the flag variable
498 // and not reuse state related to the flag state at any given time.
499 //
500 // Note that when there is a need to support develop flags to be writeable,
501 // it can be done in the same way as product_rw.
502
503 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
504 \
505 lp64_product(bool, UseCompressedOops, false, \
506 "Use 32-bit object references in 64-bit VM. " \
507 "lp64_product means flag is always constant in 32 bit VM") \
508 \
509 lp64_product(bool, UseCompressedClassPointers, false, \
510 "Use 32-bit class pointers in 64-bit VM. " \
511 "lp64_product means flag is always constant in 32 bit VM") \
512 \
513 notproduct(bool, CheckCompressedOops, true, \
514 "Generate checks in encoding/decoding code in debug VM") \
515 \
516 product_pd(uintx, HeapBaseMinAddress, \
517 "OS specific low limit for heap base address") \
518 \
519 diagnostic(bool, PrintCompressedOopsMode, false, \
520 "Print compressed oops base address and encoding mode") \
521 \
522 lp64_product(intx, ObjectAlignmentInBytes, 8, \
523 "Default object alignment in bytes, 8 is minimum") \
524 \
525 product(bool, AssumeMP, false, \
526 "Instruct the VM to assume multiple processors are available") \
527 \
528 /* UseMembar is theoretically a temp flag used for memory barrier \
529 * removal testing. It was supposed to be removed before FCS but has \
530 * been re-added (see 6401008) */ \
531 product_pd(bool, UseMembar, \
532 "(Unstable) Issues membars on thread state transitions") \
533 \
534 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
535 "Clean the chunk pool asynchronously") \
536 \
537 /* Temporary: See 6948537 */ \
538 experimental(bool, UseMemSetInBOT, true, \
539 "(Unstable) uses memset in BOT updates in GC code") \
540 \
541 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
542 "Enable normal processing of flags relating to field diagnostics")\
543 \
544 experimental(bool, UnlockExperimentalVMOptions, false, \
545 "Enable normal processing of flags relating to experimental " \
546 "features") \
547 \
548 product(bool, JavaMonitorsInStackTrace, true, \
549 "Print information about Java monitor locks when the stacks are" \
550 "dumped") \
551 \
552 product_pd(bool, UseLargePages, \
553 "Use large page memory") \
554 \
555 product_pd(bool, UseLargePagesIndividualAllocation, \
556 "Allocate large pages individually for better affinity") \
557 \
558 develop(bool, LargePagesIndividualAllocationInjectError, false, \
559 "Fail large pages individual allocation") \
560 \
561 product(bool, UseLargePagesInMetaspace, false, \
562 "Use large page memory in metaspace. " \
563 "Only used if UseLargePages is enabled.") \
564 \
565 develop(bool, TracePageSizes, false, \
566 "Trace page size selection and usage") \
567 \
568 product(bool, UseNUMA, false, \
569 "Use NUMA if available") \
570 \
571 product(bool, UseNUMAInterleaving, false, \
572 "Interleave memory across NUMA nodes if available") \
573 \
574 product(uintx, NUMAInterleaveGranularity, 2*M, \
575 "Granularity to use for NUMA interleaving on Windows OS") \
576 \
577 product(bool, ForceNUMA, false, \
578 "Force NUMA optimizations on single-node/UMA systems") \
579 \
580 product(uintx, NUMAChunkResizeWeight, 20, \
581 "Percentage (0-100) used to weigh the current sample when " \
582 "computing exponentially decaying average for " \
583 "AdaptiveNUMAChunkSizing") \
584 \
585 product(uintx, NUMASpaceResizeRate, 1*G, \
586 "Do not reallocate more than this amount per collection") \
587 \
588 product(bool, UseAdaptiveNUMAChunkSizing, true, \
589 "Enable adaptive chunk sizing for NUMA") \
590 \
591 product(bool, NUMAStats, false, \
592 "Print NUMA stats in detailed heap information") \
593 \
594 product(uintx, NUMAPageScanRate, 256, \
595 "Maximum number of pages to include in the page scan procedure") \
596 \
597 product_pd(bool, NeedsDeoptSuspend, \
598 "True for register window machines (sparc/ia64)") \
599 \
600 product(intx, UseSSE, 99, \
601 "Highest supported SSE instructions set on x86/x64") \
602 \
603 product(bool, UseAES, false, \
604 "Control whether AES instructions can be used on x86/x64") \
605 \
606 product(bool, UseSHA, false, \
607 "Control whether SHA instructions can be used on SPARC") \
608 \
609 product(bool, UseGHASHIntrinsics, false, \
610 "Use intrinsics for GHASH versions of crypto") \
611 \
612 product(uintx, LargePageSizeInBytes, 0, \
613 "Large page size (0 to let VM choose the page size)") \
614 \
615 product(uintx, LargePageHeapSizeThreshold, 128*M, \
616 "Use large pages if maximum heap is at least this big") \
617 \
618 product(bool, ForceTimeHighResolution, false, \
619 "Using high time resolution (for Win32 only)") \
620 \
621 develop(bool, TraceItables, false, \
622 "Trace initialization and use of itables") \
623 \
624 develop(bool, TracePcPatching, false, \
625 "Trace usage of frame::patch_pc") \
626 \
627 develop(bool, TraceJumps, false, \
628 "Trace assembly jumps in thread ring buffer") \
629 \
630 develop(bool, TraceRelocator, false, \
631 "Trace the bytecode relocator") \
632 \
633 develop(bool, TraceLongCompiles, false, \
634 "Print out every time compilation is longer than " \
635 "a given threshold") \
636 \
637 develop(bool, SafepointALot, false, \
638 "Generate a lot of safepoints. This works with " \
639 "GuaranteedSafepointInterval") \
640 \
641 product_pd(bool, BackgroundCompilation, \
642 "A thread requesting compilation is not blocked during " \
643 "compilation") \
644 \
645 product(bool, PrintVMQWaitTime, false, \
646 "Print out the waiting time in VM operation queue") \
647 \
648 develop(bool, NoYieldsInMicrolock, false, \
649 "Disable yields in microlock") \
650 \
651 develop(bool, TraceOopMapGeneration, false, \
652 "Show OopMapGeneration") \
653 \
654 product(bool, MethodFlushing, true, \
655 "Reclamation of zombie and not-entrant methods") \
656 \
657 develop(bool, VerifyStack, false, \
658 "Verify stack of each thread when it is entering a runtime call") \
659 \
660 diagnostic(bool, ForceUnreachable, false, \
661 "Make all non code cache addresses to be unreachable by " \
662 "forcing use of 64bit literal fixups") \
663 \
664 notproduct(bool, StressDerivedPointers, false, \
665 "Force scavenge when a derived pointer is detected on stack " \
666 "after rtm call") \
667 \
668 develop(bool, TraceDerivedPointers, false, \
669 "Trace traversal of derived pointers on stack") \
670 \
671 notproduct(bool, TraceCodeBlobStacks, false, \
672 "Trace stack-walk of codeblobs") \
673 \
674 product(bool, PrintJNIResolving, false, \
675 "Used to implement -v:jni") \
676 \
677 notproduct(bool, PrintRewrites, false, \
678 "Print methods that are being rewritten") \
679 \
680 product(bool, UseInlineCaches, true, \
681 "Use Inline Caches for virtual calls ") \
682 \
683 develop(bool, InlineArrayCopy, true, \
684 "Inline arraycopy native that is known to be part of " \
685 "base library DLL") \
686 \
687 develop(bool, InlineObjectHash, true, \
688 "Inline Object::hashCode() native that is known to be part " \
689 "of base library DLL") \
690 \
691 develop(bool, InlineNatives, true, \
692 "Inline natives that are known to be part of base library DLL") \
693 \
694 develop(bool, InlineMathNatives, true, \
695 "Inline SinD, CosD, etc.") \
696 \
697 develop(bool, InlineClassNatives, true, \
698 "Inline Class.isInstance, etc") \
699 \
700 develop(bool, InlineThreadNatives, true, \
701 "Inline Thread.currentThread, etc") \
702 \
703 develop(bool, InlineUnsafeOps, true, \
704 "Inline memory ops (native methods) from sun.misc.Unsafe") \
705 \
706 product(bool, CriticalJNINatives, true, \
707 "Check for critical JNI entry points") \
708 \
709 product(bool, UseLegacyJNINameEscaping, false, \
710 "Use the original JNI name escaping scheme") \
711 \
712 notproduct(bool, StressCriticalJNINatives, false, \
713 "Exercise register saving code in critical natives") \
714 \
715 product(bool, UseSSE42Intrinsics, false, \
716 "SSE4.2 versions of intrinsics") \
717 \
718 product(bool, UseAESIntrinsics, false, \
719 "Use intrinsics for AES versions of crypto") \
720 \
721 product(bool, UseSHA1Intrinsics, false, \
722 "Use intrinsics for SHA-1 crypto hash function") \
723 \
724 product(bool, UseSHA256Intrinsics, false, \
725 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions") \
726 \
727 product(bool, UseSHA512Intrinsics, false, \
728 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions") \
729 \
730 product(bool, UseCRC32Intrinsics, false, \
731 "use intrinsics for java.util.zip.CRC32") \
732 \
733 develop(bool, TraceCallFixup, false, \
734 "Trace all call fixups") \
735 \
736 develop(bool, DeoptimizeALot, false, \
737 "Deoptimize at every exit from the runtime system") \
738 \
739 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
740 "A comma separated list of bcis to deoptimize at") \
741 \
742 product(bool, DeoptimizeRandom, false, \
743 "Deoptimize random frames on random exit from the runtime system")\
744 \
745 notproduct(bool, ZombieALot, false, \
746 "Create zombies (non-entrant) at exit from the runtime system") \
747 \
748 product(bool, UnlinkSymbolsALot, false, \
749 "Unlink unreferenced symbols from the symbol table at safepoints")\
750 \
751 notproduct(bool, WalkStackALot, false, \
752 "Trace stack (no print) at every exit from the runtime system") \
753 \
754 product(bool, Debugging, false, \
755 "Set when executing debug methods in debug.cpp " \
756 "(to prevent triggering assertions)") \
757 \
758 notproduct(bool, StrictSafepointChecks, trueInDebug, \
759 "Enable strict checks that safepoints cannot happen for threads " \
760 "that use No_Safepoint_Verifier") \
761 \
762 notproduct(bool, VerifyLastFrame, false, \
763 "Verify oops on last frame on entry to VM") \
764 \
765 develop(bool, TraceHandleAllocation, false, \
766 "Print out warnings when suspiciously many handles are allocated")\
767 \
768 product(bool, UseCompilerSafepoints, true, \
769 "Stop at safepoints in compiled code") \
770 \
771 product(bool, FailOverToOldVerifier, true, \
772 "Fail over to old verifier when split verifier fails") \
773 \
774 develop(bool, ShowSafepointMsgs, false, \
775 "Show message about safepoint synchronization") \
776 \
777 product(bool, SafepointTimeout, false, \
778 "Time out and warn or fail after SafepointTimeoutDelay " \
779 "milliseconds if failed to reach safepoint") \
780 \
781 diagnostic(bool, AbortVMOnSafepointTimeout, false, \
782 "Abort upon failure to reach safepoint (see SafepointTimeout)") \
783 \
784 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
785 /* typically, at most a few retries are needed */ \
786 product(intx, SuspendRetryCount, 50, \
787 "Maximum retry count for an external suspend request") \
788 \
789 product(intx, SuspendRetryDelay, 5, \
790 "Milliseconds to delay per retry (* current_retry_count)") \
791 \
792 product(bool, AssertOnSuspendWaitFailure, false, \
793 "Assert/Guarantee on external suspend wait failure") \
794 \
795 product(bool, TraceSuspendWaitFailures, false, \
796 "Trace external suspend wait failures") \
797 \
798 product(bool, MaxFDLimit, true, \
799 "Bump the number of file descriptors to maximum in Solaris") \
800 \
801 diagnostic(bool, LogEvents, true, \
802 "Enable the various ring buffer event logs") \
803 \
804 diagnostic(uintx, LogEventsBufferEntries, 10, \
805 "Number of ring buffer event logs") \
806 \
807 product(bool, BytecodeVerificationRemote, true, \
808 "Enable the Java bytecode verifier for remote classes") \
809 \
810 product(bool, BytecodeVerificationLocal, false, \
811 "Enable the Java bytecode verifier for local classes") \
812 \
813 develop(bool, ForceFloatExceptions, trueInDebug, \
814 "Force exceptions on FP stack under/overflow") \
815 \
816 develop(bool, VerifyStackAtCalls, false, \
817 "Verify that the stack pointer is unchanged after calls") \
818 \
819 develop(bool, TraceJavaAssertions, false, \
820 "Trace java language assertions") \
821 \
822 notproduct(bool, CheckAssertionStatusDirectives, false, \
823 "Temporary - see javaClasses.cpp") \
824 \
825 notproduct(bool, PrintMallocFree, false, \
826 "Trace calls to C heap malloc/free allocation") \
827 \
828 product(bool, PrintOopAddress, false, \
829 "Always print the location of the oop") \
830 \
831 notproduct(bool, VerifyCodeCacheOften, false, \
832 "Verify compiled-code cache often") \
833 \
834 develop(bool, ZapDeadCompiledLocals, false, \
835 "Zap dead locals in compiler frames") \
836 \
837 notproduct(bool, ZapDeadLocalsOld, false, \
838 "Zap dead locals (old version, zaps all frames when " \
839 "entering the VM") \
840 \
841 notproduct(bool, CheckOopishValues, false, \
842 "Warn if value contains oop (requires ZapDeadLocals)") \
843 \
844 develop(bool, UseMallocOnly, false, \
845 "Use only malloc/free for allocation (no resource area/arena)") \
846 \
847 develop(bool, PrintMalloc, false, \
848 "Print all malloc/free calls") \
849 \
850 develop(bool, PrintMallocStatistics, false, \
851 "Print malloc/free statistics") \
852 \
853 develop(bool, ZapResourceArea, trueInDebug, \
854 "Zap freed resource/arena space with 0xABABABAB") \
855 \
856 notproduct(bool, ZapVMHandleArea, trueInDebug, \
857 "Zap freed VM handle space with 0xBCBCBCBC") \
858 \
859 develop(bool, ZapJNIHandleArea, trueInDebug, \
860 "Zap freed JNI handle space with 0xFEFEFEFE") \
861 \
862 notproduct(bool, ZapStackSegments, trueInDebug, \
863 "Zap allocated/freed stack segments with 0xFADFADED") \
864 \
865 develop(bool, ZapUnusedHeapArea, trueInDebug, \
866 "Zap unused heap space with 0xBAADBABE") \
867 \
868 develop(bool, TraceZapUnusedHeapArea, false, \
869 "Trace zapping of unused heap space") \
870 \
871 develop(bool, CheckZapUnusedHeapArea, false, \
872 "Check zapping of unused heap space") \
873 \
874 develop(bool, ZapFillerObjects, trueInDebug, \
875 "Zap filler objects with 0xDEAFBABE") \
876 \
877 develop(bool, PrintVMMessages, true, \
878 "Print VM messages on console") \
879 \
880 product(bool, PrintGCApplicationConcurrentTime, false, \
881 "Print the time the application has been running") \
882 \
883 product(bool, PrintGCApplicationStoppedTime, false, \
884 "Print the time the application has been stopped") \
885 \
886 diagnostic(bool, VerboseVerification, false, \
887 "Display detailed verification details") \
888 \
889 notproduct(uintx, ErrorHandlerTest, 0, \
890 "If > 0, provokes an error after VM initialization; the value " \
891 "determines which error to provoke. See test_error_handler() " \
892 "in debug.cpp.") \
893 \
894 develop(bool, Verbose, false, \
895 "Print additional debugging information from other modes") \
896 \
897 develop(bool, PrintMiscellaneous, false, \
898 "Print uncategorized debugging information (requires +Verbose)") \
899 \
900 develop(bool, WizardMode, false, \
901 "Print much more debugging information") \
902 \
903 product(bool, ShowMessageBoxOnError, false, \
904 "Keep process alive on VM fatal error") \
905 \
906 product(bool, CreateMinidumpOnCrash, false, \
907 "Create minidump on VM fatal error") \
908 \
909 product_pd(bool, UseOSErrorReporting, \
910 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
911 \
912 product(bool, SuppressFatalErrorMessage, false, \
913 "Report NO fatal error message (avoid deadlock)") \
914 \
915 product(ccstrlist, OnError, "", \
916 "Run user-defined commands on fatal error; see VMError.cpp " \
917 "for examples") \
918 \
919 product(ccstrlist, OnOutOfMemoryError, "", \
920 "Run user-defined commands on first java.lang.OutOfMemoryError") \
921 \
922 manageable(bool, HeapDumpBeforeFullGC, false, \
923 "Dump heap to file before any major stop-the-world GC") \
924 \
925 manageable(bool, HeapDumpAfterFullGC, false, \
926 "Dump heap to file after any major stop-the-world GC") \
927 \
928 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
929 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
930 \
931 manageable(ccstr, HeapDumpPath, NULL, \
932 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \
933 "directory) of the dump file (defaults to java_pid<pid>.hprof " \
934 "in the working directory)") \
935 \
936 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
937 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
938 "when the heap usage is larger than this") \
939 \
940 develop(uintx, HeapDumpSegmentSize, 1*G, \
941 "Approximate segment size when generating a segmented heap dump") \
942 \
943 develop(bool, BreakAtWarning, false, \
944 "Execute breakpoint upon encountering VM warning") \
945 \
946 develop(bool, TraceVMOperation, false, \
947 "Trace VM operations") \
948 \
949 develop(bool, UseFakeTimers, false, \
950 "Tell whether the VM should use system time or a fake timer") \
951 \
952 product(ccstr, NativeMemoryTracking, "off", \
953 "Native memory tracking options") \
954 \
955 diagnostic(bool, PrintNMTStatistics, false, \
956 "Print native memory tracking summary data if it is on") \
957 \
958 diagnostic(bool, LogCompilation, false, \
959 "Log compilation activity in detail to LogFile") \
960 \
961 product(bool, PrintCompilation, false, \
962 "Print compilations") \
963 \
964 diagnostic(bool, TraceNMethodInstalls, false, \
965 "Trace nmethod installation") \
966 \
967 diagnostic(intx, ScavengeRootsInCode, 2, \
968 "0: do not allow scavengable oops in the code cache; " \
969 "1: allow scavenging from the code cache; " \
970 "2: emit as many constants as the compiler can see") \
971 \
972 product(bool, AlwaysRestoreFPU, false, \
973 "Restore the FPU control word after every JNI call (expensive)") \
974 \
975 diagnostic(bool, PrintCompilation2, false, \
976 "Print additional statistics per compilation") \
977 \
978 diagnostic(bool, PrintAdapterHandlers, false, \
979 "Print code generated for i2c/c2i adapters") \
980 \
981 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \
982 "Verify that i2c/c2i adapters are called properly") \
983 \
984 develop(bool, VerifyAdapterSharing, false, \
985 "Verify that the code for shared adapters is the equivalent") \
986 \
987 diagnostic(bool, PrintAssembly, false, \
988 "Print assembly code (using external disassembler.so)") \
989 \
990 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
991 "Print options string passed to disassembler.so") \
992 \
993 diagnostic(bool, PrintNMethods, false, \
994 "Print assembly code for nmethods when generated") \
995 \
996 diagnostic(bool, PrintNativeNMethods, false, \
997 "Print assembly code for native nmethods when generated") \
998 \
999 develop(bool, PrintDebugInfo, false, \
1000 "Print debug information for all nmethods when generated") \
1001 \
1002 develop(bool, PrintRelocations, false, \
1003 "Print relocation information for all nmethods when generated") \
1004 \
1005 develop(bool, PrintDependencies, false, \
1006 "Print dependency information for all nmethods when generated") \
1007 \
1008 develop(bool, PrintExceptionHandlers, false, \
1009 "Print exception handler tables for all nmethods when generated") \
1010 \
1011 develop(bool, StressCompiledExceptionHandlers, false, \
1012 "Exercise compiled exception handlers") \
1013 \
1014 develop(bool, InterceptOSException, false, \
1015 "Start debugger when an implicit OS (e.g. NULL) " \
1016 "exception happens") \
1017 \
1018 product(bool, PrintCodeCache, false, \
1019 "Print the code cache memory usage when exiting") \
1020 \
1021 develop(bool, PrintCodeCache2, false, \
1022 "Print detailed usage information on the code cache when exiting")\
1023 \
1024 product(bool, PrintCodeCacheOnCompilation, false, \
1025 "Print the code cache memory usage each time a method is " \
1026 "compiled") \
1027 \
1028 diagnostic(bool, PrintStubCode, false, \
1029 "Print generated stub code") \
1030 \
1031 product(bool, StackTraceInThrowable, true, \
1032 "Collect backtrace in throwable when exception happens") \
1033 \
1034 product(bool, OmitStackTraceInFastThrow, true, \
1035 "Omit backtraces for some 'hot' exceptions in optimized code") \
1036 \
1037 product(bool, ProfilerPrintByteCodeStatistics, false, \
1038 "Print bytecode statistics when dumping profiler output") \
1039 \
1040 product(bool, ProfilerRecordPC, false, \
1041 "Collect ticks for each 16 byte interval of compiled code") \
1042 \
1043 product(bool, ProfileVM, false, \
1044 "Profile ticks that fall within VM (either in the VM Thread " \
1045 "or VM code called through stubs)") \
1046 \
1047 product(bool, ProfileIntervals, false, \
1048 "Print profiles for each interval (see ProfileIntervalsTicks)") \
1049 \
1050 notproduct(bool, ProfilerCheckIntervals, false, \
1051 "Collect and print information on spacing of profiler ticks") \
1052 \
1053 develop(bool, PrintJVMWarnings, false, \
1054 "Print warnings for unimplemented JVM functions") \
1055 \
1056 product(bool, PrintWarnings, true, \
1057 "Print JVM warnings to output stream") \
1058 \
1059 notproduct(uintx, WarnOnStalledSpinLock, 0, \
1060 "Print warnings for stalled SpinLocks") \
1061 \
1062 product(bool, RegisterFinalizersAtInit, true, \
1063 "Register finalizable objects at end of Object.<init> or " \
1064 "after allocation") \
1065 \
1066 develop(bool, RegisterReferences, true, \
1067 "Tell whether the VM should register soft/weak/final/phantom " \
1068 "references") \
1069 \
1070 develop(bool, IgnoreRewrites, false, \
1071 "Suppress rewrites of bytecodes in the oopmap generator. " \
1072 "This is unsafe!") \
1073 \
1074 develop(bool, PrintCodeCacheExtension, false, \
1075 "Print extension of code cache") \
1076 \
1077 develop(bool, UsePrivilegedStack, true, \
1078 "Enable the security JVM functions") \
1079 \
1080 develop(bool, ProtectionDomainVerification, true, \
1081 "Verify protection domain before resolution in system dictionary")\
1082 \
1083 product(bool, ClassUnloading, true, \
1084 "Do unloading of classes") \
1085 \
1086 product(bool, ClassUnloadingWithConcurrentMark, true, \
1087 "Do unloading of classes with a concurrent marking cycle") \
1088 \
1089 develop(bool, DisableStartThread, false, \
1090 "Disable starting of additional Java threads " \
1091 "(for debugging only)") \
1092 \
1093 develop(bool, MemProfiling, false, \
1094 "Write memory usage profiling to log file") \
1095 \
1096 notproduct(bool, PrintSystemDictionaryAtExit, false, \
1097 "Print the system dictionary at exit") \
1098 \
1099 experimental(intx, PredictedLoadedClassCount, 0, \
1100 "Experimental: Tune loaded class cache starting size") \
1101 \
1102 diagnostic(bool, UnsyncloadClass, false, \
1103 "Unstable: VM calls loadClass unsynchronized. Custom " \
1104 "class loader must call VM synchronized for findClass " \
1105 "and defineClass.") \
1106 \
1107 product(bool, AlwaysLockClassLoader, false, \
1108 "Require the VM to acquire the class loader lock before calling " \
1109 "loadClass() even for class loaders registering " \
1110 "as parallel capable") \
1111 \
1112 product(bool, AllowParallelDefineClass, false, \
1113 "Allow parallel defineClass requests for class loaders " \
1114 "registering as parallel capable") \
1115 \
1116 product(bool, MustCallLoadClassInternal, false, \
1117 "Call loadClassInternal() rather than loadClass()") \
1118 \
1119 product_pd(bool, DontYieldALot, \
1120 "Throw away obvious excess yield calls (for Solaris only)") \
1121 \
1122 product_pd(bool, ConvertSleepToYield, \
1123 "Convert sleep(0) to thread yield " \
1124 "(may be off for Solaris to improve GUI)") \
1125 \
1126 product(bool, ConvertYieldToSleep, false, \
1127 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
1128 "behavior (Solaris only)") \
1129 \
1130 product(bool, UseBoundThreads, true, \
1131 "Bind user level threads to kernel threads (for Solaris only)") \
1132 \
1133 develop(bool, UseDetachedThreads, true, \
1134 "Use detached threads that are recycled upon termination " \
1135 "(for Solaris only)") \
1136 \
1137 experimental(bool, DisablePrimordialThreadGuardPages, false, \
1138 "Disable the use of stack guard pages if the JVM is loaded " \
1139 "on the primordial process thread") \
1140 \
1141 product(bool, UseLWPSynchronization, true, \
1142 "Use LWP-based instead of libthread-based synchronization " \
1143 "(SPARC only)") \
1144 \
1145 product(ccstr, SyncKnobs, NULL, \
1146 "(Unstable) Various monitor synchronization tunables") \
1147 \
1148 product(intx, EmitSync, 0, \
1149 "(Unsafe, Unstable) " \
1150 "Control emission of inline sync fast-path code") \
1151 \
1152 product(intx, MonitorBound, 0, "Bound Monitor population") \
1153 \
1154 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
1155 \
1156 product(intx, SyncFlags, 0, "(Unsafe, Unstable) Experimental Sync flags") \
1157 \
1158 product(intx, SyncVerbose, 0, "(Unstable)") \
1159 \
1160 product(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \
1161 \
1162 product(intx, hashCode, 5, \
1163 "(Unstable) select hashCode generation algorithm") \
1164 \
1165 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
1166 "(Unstable, Linux-specific) " \
1167 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \
1168 \
1169 product(bool, FilterSpuriousWakeups, true, \
1170 "Prevent spurious or premature wakeups from object.wait " \
1171 "(Solaris only)") \
1172 \
1173 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \
1174 \
1175 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \
1176 \
1177 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \
1178 \
1179 develop(bool, UsePthreads, false, \
1180 "Use pthread-based instead of libthread-based synchronization " \
1181 "(SPARC only)") \
1182 \
1183 product(bool, AdjustConcurrency, false, \
1184 "Call thr_setconcurrency at thread creation time to avoid " \
1185 "LWP starvation on MP systems (for Solaris Only)") \
1186 \
1187 product(bool, ReduceSignalUsage, false, \
1188 "Reduce the use of OS signals in Java and/or the VM") \
1189 \
1190 develop(bool, LoadLineNumberTables, true, \
1191 "Tell whether the class file parser loads line number tables") \
1192 \
1193 develop(bool, LoadLocalVariableTables, true, \
1194 "Tell whether the class file parser loads local variable tables") \
1195 \
1196 develop(bool, LoadLocalVariableTypeTables, true, \
1197 "Tell whether the class file parser loads local variable type" \
1198 "tables") \
1199 \
1200 product(bool, AllowUserSignalHandlers, false, \
1201 "Do not complain if the application installs signal handlers " \
1202 "(Solaris & Linux only)") \
1203 \
1204 product(bool, UseSignalChaining, true, \
1205 "Use signal-chaining to invoke signal handlers installed " \
1206 "by the application (Solaris & Linux only)") \
1207 \
1208 product(bool, UseAltSigs, false, \
1209 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
1210 "internal signals (Solaris only)") \
1211 \
1212 product(bool, AllowJNIEnvProxy, false, \
1213 "Allow JNIEnv proxies for jdbx") \
1214 \
1215 product(bool, JNIDetachReleasesMonitors, true, \
1216 "JNI DetachCurrentThread releases monitors owned by thread") \
1217 \
1218 product(bool, RestoreMXCSROnJNICalls, false, \
1219 "Restore MXCSR when returning from JNI calls") \
1220 \
1221 product(bool, CheckJNICalls, false, \
1222 "Verify all arguments to JNI calls") \
1223 \
1224 product(bool, CheckEndorsedAndExtDirs, false, \
1225 "Verify the endorsed and extension directories are not used") \
1226 \
1227 product(bool, UseFastJNIAccessors, true, \
1228 "Use optimized versions of Get<Primitive>Field") \
1229 \
1230 product(intx, MaxJNILocalCapacity, 65536, \
1231 "Maximum allowable local JNI handle capacity to " \
1232 "EnsureLocalCapacity() and PushLocalFrame(), " \
1233 "where <= 0 is unlimited, default: 65536") \
1234 \
1235 product(bool, EagerXrunInit, false, \
1236 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1237 "but not all -Xrun libraries may support the state of the VM " \
1238 "at this time") \
1239 \
1240 product(bool, PreserveAllAnnotations, false, \
1241 "Preserve RuntimeInvisibleAnnotations as well " \
1242 "as RuntimeVisibleAnnotations") \
1243 \
1244 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1245 "Number of OutOfMemoryErrors preallocated with backtrace") \
1246 \
1247 product(bool, LazyBootClassLoader, true, \
1248 "Enable/disable lazy opening of boot class path entries") \
1249 \
1250 product(bool, UseXMMForArrayCopy, false, \
1251 "Use SSE2 MOVQ instruction for Arraycopy") \
1252 \
1253 product(intx, FieldsAllocationStyle, 1, \
1254 "0 - type based with oops first, 1 - with oops last, " \
1255 "2 - oops in super and sub classes are together") \
1256 \
1257 product(bool, CompactFields, true, \
1258 "Allocate nonstatic fields in gaps between previous fields") \
1259 \
1260 notproduct(bool, PrintFieldLayout, false, \
1261 "Print field layout for each class") \
1262 \
1263 product(intx, ContendedPaddingWidth, 128, \
1264 "How many bytes to pad the fields/classes marked @Contended with")\
1265 \
1266 product(bool, EnableContended, true, \
1267 "Enable @Contended annotation support") \
1268 \
1269 product(bool, RestrictContended, true, \
1270 "Restrict @Contended to trusted classes") \
1271 \
1272 product(bool, UseBiasedLocking, true, \
1273 "Enable biased locking in JVM") \
1274 \
1275 product(intx, BiasedLockingStartupDelay, 4000, \
1276 "Number of milliseconds to wait before enabling biased locking") \
1277 \
1278 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1279 "Print statistics of biased locking in JVM") \
1280 \
1281 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1282 "Threshold of number of revocations per type to try to " \
1283 "rebias all objects in the heap of that type") \
1284 \
1285 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1286 "Threshold of number of revocations per type to permanently " \
1287 "revoke biases of all objects in the heap of that type") \
1288 \
1289 product(intx, BiasedLockingDecayTime, 25000, \
1290 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1291 "type after previous bulk rebias") \
1292 \
1293 product(bool, ExitOnOutOfMemoryError, false, \
1294 "JVM exits on the first occurrence of an out-of-memory error") \
1295 \
1296 product(bool, CrashOnOutOfMemoryError, false, \
1297 "JVM aborts, producing an error log and core/mini dump, on the " \
1298 "first occurrence of an out-of-memory error") \
1299 \
1300 /* tracing */ \
1301 \
1302 notproduct(bool, TraceRuntimeCalls, false, \
1303 "Trace run-time calls") \
1304 \
1305 develop(bool, TraceJNICalls, false, \
1306 "Trace JNI calls") \
1307 \
1308 develop(bool, StressRewriter, false, \
1309 "Stress linktime bytecode rewriting") \
1310 \
1311 notproduct(bool, TraceJVMCalls, false, \
1312 "Trace JVM calls") \
1313 \
1314 product(ccstr, TraceJVMTI, NULL, \
1315 "Trace flags for JVMTI functions and events") \
1316 \
1317 /* This option can change an EMCP method into an obsolete method. */ \
1318 /* This can affect tests that except specific methods to be EMCP. */ \
1319 /* This option should be used with caution. */ \
1320 product(bool, StressLdcRewrite, false, \
1321 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1322 \
1323 product(intx, TraceRedefineClasses, 0, \
1324 "Trace level for JVMTI RedefineClasses") \
1325 \
1326 develop(bool, StressMethodComparator, false, \
1327 "Run the MethodComparator on all loaded methods") \
1328 \
1329 /* change to false by default sometime after Mustang */ \
1330 product(bool, VerifyMergedCPBytecodes, true, \
1331 "Verify bytecodes after RedefineClasses constant pool merging") \
1332 \
1333 develop(bool, TraceJNIHandleAllocation, false, \
1334 "Trace allocation/deallocation of JNI handle blocks") \
1335 \
1336 develop(bool, TraceThreadEvents, false, \
1337 "Trace all thread events") \
1338 \
1339 develop(bool, TraceBytecodes, false, \
1340 "Trace bytecode execution") \
1341 \
1342 develop(bool, TraceClassInitialization, false, \
1343 "Trace class initialization") \
1344 \
1345 product(bool, TraceExceptions, false, \
1346 "Trace exceptions") \
1347 \
1348 develop(bool, TraceICs, false, \
1349 "Trace inline cache changes") \
1350 \
1351 notproduct(bool, TraceInvocationCounterOverflow, false, \
1352 "Trace method invocation counter overflow") \
1353 \
1354 develop(bool, TraceInlineCacheClearing, false, \
1355 "Trace clearing of inline caches in nmethods") \
1356 \
1357 develop(bool, TraceDependencies, false, \
1358 "Trace dependencies") \
1359 \
1360 develop(bool, VerifyDependencies, trueInDebug, \
1361 "Exercise and verify the compilation dependency mechanism") \
1362 \
1363 develop(bool, TraceNewOopMapGeneration, false, \
1364 "Trace OopMapGeneration") \
1365 \
1366 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1367 "Trace OopMapGeneration: print detailed cell states") \
1368 \
1369 develop(bool, TimeOopMap, false, \
1370 "Time calls to GenerateOopMap::compute_map() in sum") \
1371 \
1372 develop(bool, TimeOopMap2, false, \
1373 "Time calls to GenerateOopMap::compute_map() individually") \
1374 \
1375 develop(bool, TraceMonitorMismatch, false, \
1376 "Trace monitor matching failures during OopMapGeneration") \
1377 \
1378 develop(bool, TraceOopMapRewrites, false, \
1379 "Trace rewriting of method oops during oop map generation") \
1380 \
1381 develop(bool, TraceSafepoint, false, \
1382 "Trace safepoint operations") \
1383 \
1384 develop(bool, TraceICBuffer, false, \
1385 "Trace usage of IC buffer") \
1386 \
1387 develop(bool, TraceCompiledIC, false, \
1388 "Trace changes of compiled IC") \
1389 \
1390 notproduct(bool, TraceZapDeadLocals, false, \
1391 "Trace zapping dead locals") \
1392 \
1393 develop(bool, TraceStartupTime, false, \
1394 "Trace setup time") \
1395 \
1396 develop(bool, TraceProtectionDomainVerification, false, \
1397 "Trace protection domain verification") \
1398 \
1399 develop(bool, TraceClearedExceptions, false, \
1400 "Print when an exception is forcibly cleared") \
1401 \
1402 product(bool, TraceClassResolution, false, \
1403 "Trace all constant pool resolutions (for debugging)") \
1404 \
1405 product(bool, TraceBiasedLocking, false, \
1406 "Trace biased locking in JVM") \
1407 \
1408 product(bool, TraceMonitorInflation, false, \
1409 "Trace monitor inflation in JVM") \
1410 \
1411 /* gc */ \
1412 \
1413 product(bool, UseSerialGC, false, \
1414 "Use the Serial garbage collector") \
1415 \
1416 product(bool, UseG1GC, false, \
1417 "Use the Garbage-First garbage collector") \
1418 \
1419 product(bool, UseParallelGC, false, \
1420 "Use the Parallel Scavenge garbage collector") \
1421 \
1422 product(bool, UseParallelOldGC, false, \
1423 "Use the Parallel Old garbage collector") \
1424 \
1425 product(uintx, HeapMaximumCompactionInterval, 20, \
1426 "How often should we maximally compact the heap (not allowing " \
1427 "any dead space)") \
1428 \
1429 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1430 "The collection count for the first maximum compaction") \
1431 \
1432 product(bool, UseMaximumCompactionOnSystemGC, true, \
1433 "Use maximum compaction in the Parallel Old garbage collector " \
1434 "for a system GC") \
1435 \
1436 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1437 "The mean used by the parallel compact dead wood " \
1438 "limiter (a number between 0-100)") \
1439 \
1440 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1441 "The standard deviation used by the parallel compact dead wood " \
1442 "limiter (a number between 0-100)") \
1443 \
1444 product(uintx, ParallelGCThreads, 0, \
1445 "Number of parallel threads parallel gc will use") \
1446 \
1447 product(bool, UseDynamicNumberOfGCThreads, false, \
1448 "Dynamically choose the number of parallel threads " \
1449 "parallel gc will use") \
1450 \
1451 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
1452 "Force dynamic selection of the number of " \
1453 "parallel threads parallel gc will use to aid debugging") \
1454 \
1455 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \
1456 "Size of heap (bytes) per GC thread used in calculating the " \
1457 "number of GC threads") \
1458 \
1459 product(bool, TraceDynamicGCThreads, false, \
1460 "Trace the dynamic GC thread usage") \
1461 \
1462 develop(bool, ParallelOldGCSplitALot, false, \
1463 "Provoke splitting (copying data from a young gen space to " \
1464 "multiple destination spaces)") \
1465 \
1466 develop(uintx, ParallelOldGCSplitInterval, 3, \
1467 "How often to provoke splitting a young gen space") \
1468 \
1469 product(uintx, ConcGCThreads, 0, \
1470 "Number of threads concurrent gc will use") \
1471 \
1472 product(uintx, YoungPLABSize, 4096, \
1473 "Size of young gen promotion LAB's (in HeapWords)") \
1474 \
1475 product(uintx, OldPLABSize, 1024, \
1476 "Size of old gen promotion LAB's (in HeapWords)") \
1477 \
1478 product(uintx, GCTaskTimeStampEntries, 200, \
1479 "Number of time stamp entries per gc worker thread") \
1480 \
1481 product(bool, AlwaysTenure, false, \
1482 "Always tenure objects in eden (ParallelGC only)") \
1483 \
1484 product(bool, NeverTenure, false, \
1485 "Never tenure objects in eden, may tenure on overflow " \
1486 "(ParallelGC only)") \
1487 \
1488 product(bool, ScavengeBeforeFullGC, true, \
1489 "Scavenge youngest generation before each full GC, " \
1490 "used with UseParallelGC") \
1491 \
1492 develop(bool, ScavengeWithObjectsInToSpace, false, \
1493 "Allow scavenges to occur when to-space contains objects") \
1494 \
1495 product(bool, UseConcMarkSweepGC, false, \
1496 "Use Concurrent Mark-Sweep GC in the old generation") \
1497 \
1498 product(bool, ExplicitGCInvokesConcurrent, false, \
1499 "A System.gc() request invokes a concurrent collection; " \
1500 "(effective only when UseConcMarkSweepGC)") \
1501 \
1502 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1503 "A System.gc() request invokes a concurrent collection and " \
1504 "also unloads classes during such a concurrent gc cycle " \
1505 "(effective only when UseConcMarkSweepGC)") \
1506 \
1507 product(bool, GCLockerInvokesConcurrent, false, \
1508 "The exit of a JNI critical section necessitating a scavenge, " \
1509 "also kicks off a background concurrent collection") \
1510 \
1511 product(uintx, GCLockerEdenExpansionPercent, 5, \
1512 "How much the GC can expand the eden by while the GC locker " \
1513 "is active (as a percentage)") \
1514 \
1515 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \
1516 "Number of times to retry allocations when " \
1517 "blocked by the GC locker") \
1518 \
1519 develop(bool, UseCMSAdaptiveFreeLists, true, \
1520 "Use adaptive free lists in the CMS generation") \
1521 \
1522 develop(bool, UseAsyncConcMarkSweepGC, true, \
1523 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1524 \
1525 develop(bool, RotateCMSCollectionTypes, false, \
1526 "Rotate the CMS collections among concurrent and STW") \
1527 \
1528 product(bool, UseCMSBestFit, true, \
1529 "Use CMS best fit allocation strategy") \
1530 \
1531 product(bool, UseCMSCollectionPassing, true, \
1532 "Use passing of collection from background to foreground") \
1533 \
1534 product(bool, UseParNewGC, false, \
1535 "Use parallel threads in the new generation") \
1536 \
1537 product(bool, ParallelGCVerbose, false, \
1538 "Verbose output for parallel gc") \
1539 \
1540 product(uintx, ParallelGCBufferWastePct, 10, \
1541 "Wasted fraction of parallel allocation buffer") \
1542 \
1543 diagnostic(bool, ParallelGCRetainPLAB, false, \
1544 "Retain parallel allocation buffers across scavenges; " \
1545 "it is disabled because this currently conflicts with " \
1546 "parallel card scanning under certain conditions.") \
1547 \
1548 product(uintx, TargetPLABWastePct, 10, \
1549 "Target wasted space in last buffer as percent of overall " \
1550 "allocation") \
1551 \
1552 product(uintx, PLABWeight, 75, \
1553 "Percentage (0-100) used to weigh the current sample when " \
1554 "computing exponentially decaying average for ResizePLAB") \
1555 \
1556 product(bool, ResizePLAB, true, \
1557 "Dynamically resize (survivor space) promotion LAB's") \
1558 \
1559 product(bool, PrintPLAB, false, \
1560 "Print (survivor space) promotion LAB's sizing decisions") \
1561 \
1562 product(intx, ParGCArrayScanChunk, 50, \
1563 "Scan a subset of object array and push remainder, if array is " \
1564 "bigger than this") \
1565 \
1566 product(bool, ParGCUseLocalOverflow, false, \
1567 "Instead of a global overflow list, use local overflow stacks") \
1568 \
1569 product(bool, ParGCTrimOverflow, true, \
1570 "Eagerly trim the local overflow lists " \
1571 "(when ParGCUseLocalOverflow)") \
1572 \
1573 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1574 "Simulate work queue overflow in ParNew") \
1575 \
1576 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1577 "An `interval' counter that determines how frequently " \
1578 "we simulate overflow; a smaller number increases frequency") \
1579 \
1580 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1581 "The desired number of objects to claim from the overflow list") \
1582 \
1583 diagnostic(uintx, ParGCStridesPerThread, 2, \
1584 "The number of strides per worker thread that we divide up the " \
1585 "card table scanning work into") \
1586 \
1587 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
1588 "The number of cards in each chunk of the parallel chunks used " \
1589 "during card table scanning") \
1590 \
1591 product(uintx, CMSParPromoteBlocksToClaim, 16, \
1592 "Number of blocks to attempt to claim when refilling CMS LAB's " \
1593 "for parallel GC") \
1594 \
1595 product(uintx, OldPLABWeight, 50, \
1596 "Percentage (0-100) used to weight the current sample when " \
1597 "computing exponentially decaying average for resizing " \
1598 "CMSParPromoteBlocksToClaim") \
1599 \
1600 product(bool, ResizeOldPLAB, true, \
1601 "Dynamically resize (old gen) promotion LAB's") \
1602 \
1603 product(bool, PrintOldPLAB, false, \
1604 "Print (old gen) promotion LAB's sizing decisions") \
1605 \
1606 product(uintx, CMSOldPLABMin, 16, \
1607 "Minimum size of CMS gen promotion LAB caches per worker " \
1608 "per block size") \
1609 \
1610 product(uintx, CMSOldPLABMax, 1024, \
1611 "Maximum size of CMS gen promotion LAB caches per worker " \
1612 "per block size") \
1613 \
1614 product(uintx, CMSOldPLABNumRefills, 4, \
1615 "Nominal number of refills of CMS gen promotion LAB cache " \
1616 "per worker per block size") \
1617 \
1618 product(bool, CMSOldPLABResizeQuicker, false, \
1619 "React on-the-fly during a scavenge to a sudden " \
1620 "change in block demand rate") \
1621 \
1622 product(uintx, CMSOldPLABToleranceFactor, 4, \
1623 "The tolerance of the phase-change detector for on-the-fly " \
1624 "PLAB resizing during a scavenge") \
1625 \
1626 product(uintx, CMSOldPLABReactivityFactor, 2, \
1627 "The gain in the feedback loop for on-the-fly PLAB resizing " \
1628 "during a scavenge") \
1629 \
1630 product(bool, AlwaysPreTouch, false, \
1631 "Force all freshly committed pages to be pre-touched") \
1632 \
1633 product_pd(uintx, CMSYoungGenPerWorker, \
1634 "The maximum size of young gen chosen by default per GC worker " \
1635 "thread available") \
1636 \
1637 product(bool, CMSIncrementalMode, false, \
1638 "Whether CMS GC should operate in \"incremental\" mode") \
1639 \
1640 product(uintx, CMSIncrementalDutyCycle, 10, \
1641 "Percentage (0-100) of CMS incremental mode duty cycle. If " \
1642 "CMSIncrementalPacing is enabled, then this is just the initial " \
1643 "value.") \
1644 \
1645 product(bool, CMSIncrementalPacing, true, \
1646 "Whether the CMS incremental mode duty cycle should be " \
1647 "automatically adjusted") \
1648 \
1649 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1650 "Minimum percentage (0-100) of the CMS incremental duty cycle " \
1651 "used when CMSIncrementalPacing is enabled") \
1652 \
1653 product(uintx, CMSIncrementalSafetyFactor, 10, \
1654 "Percentage (0-100) used to add conservatism when computing the " \
1655 "duty cycle") \
1656 \
1657 product(uintx, CMSIncrementalOffset, 0, \
1658 "Percentage (0-100) by which the CMS incremental mode duty cycle "\
1659 "is shifted to the right within the period between young GCs") \
1660 \
1661 product(uintx, CMSExpAvgFactor, 50, \
1662 "Percentage (0-100) used to weigh the current sample when " \
1663 "computing exponential averages for CMS statistics") \
1664 \
1665 product(uintx, CMS_FLSWeight, 75, \
1666 "Percentage (0-100) used to weigh the current sample when " \
1667 "computing exponentially decaying averages for CMS FLS " \
1668 "statistics") \
1669 \
1670 product(uintx, CMS_FLSPadding, 1, \
1671 "The multiple of deviation from mean to use for buffering " \
1672 "against volatility in free list demand") \
1673 \
1674 product(uintx, FLSCoalescePolicy, 2, \
1675 "CMS: aggressiveness level for coalescing, increasing " \
1676 "from 0 to 4") \
1677 \
1678 product(bool, FLSAlwaysCoalesceLarge, false, \
1679 "CMS: larger free blocks are always available for coalescing") \
1680 \
1681 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1682 "CMS: the smaller the percentage the greater the coalescing " \
1683 "force") \
1684 \
1685 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1686 "CMS: the factor by which to inflate estimated demand of small " \
1687 "block sizes to prevent coalescing with an adjoining block") \
1688 \
1689 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1690 "CMS: the factor by which to inflate estimated demand of large " \
1691 "block sizes to prevent coalescing with an adjoining block") \
1692 \
1693 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1694 "CMS: the factor by which to inflate estimated demand of small " \
1695 "block sizes to prevent splitting to supply demand for smaller " \
1696 "blocks") \
1697 \
1698 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1699 "CMS: the factor by which to inflate estimated demand of large " \
1700 "block sizes to prevent splitting to supply demand for smaller " \
1701 "blocks") \
1702 \
1703 product(bool, CMSExtrapolateSweep, false, \
1704 "CMS: cushion for block demand during sweep") \
1705 \
1706 product(uintx, CMS_SweepWeight, 75, \
1707 "Percentage (0-100) used to weight the current sample when " \
1708 "computing exponentially decaying average for inter-sweep " \
1709 "duration") \
1710 \
1711 product(uintx, CMS_SweepPadding, 1, \
1712 "The multiple of deviation from mean to use for buffering " \
1713 "against volatility in inter-sweep duration") \
1714 \
1715 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1716 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1717 "duration exceeds this threshold in milliseconds") \
1718 \
1719 develop(bool, CMSTraceIncrementalMode, false, \
1720 "Trace CMS incremental mode") \
1721 \
1722 develop(bool, CMSTraceIncrementalPacing, false, \
1723 "Trace CMS incremental mode pacing computation") \
1724 \
1725 develop(bool, CMSTraceThreadState, false, \
1726 "Trace the CMS thread state (enable the trace_state() method)") \
1727 \
1728 product(bool, CMSClassUnloadingEnabled, true, \
1729 "Whether class unloading enabled when using CMS GC") \
1730 \
1731 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1732 "When CMS class unloading is enabled, the maximum CMS cycle " \
1733 "count for which classes may not be unloaded") \
1734 \
1735 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1736 "Compact when asked to collect CMS gen with " \
1737 "clear_all_soft_refs()") \
1738 \
1739 product(bool, UseCMSCompactAtFullCollection, true, \
1740 "Use Mark-Sweep-Compact algorithm at full collections") \
1741 \
1742 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1743 "Number of CMS full collection done before compaction if > 0") \
1744 \
1745 develop(intx, CMSDictionaryChoice, 0, \
1746 "Use BinaryTreeDictionary as default in the CMS generation") \
1747 \
1748 product(uintx, CMSIndexedFreeListReplenish, 4, \
1749 "Replenish an indexed free list with this number of chunks") \
1750 \
1751 product(bool, CMSReplenishIntermediate, true, \
1752 "Replenish all intermediate free-list caches") \
1753 \
1754 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1755 "When satisfying batched demand, split blocks from the " \
1756 "IndexedFreeList whose size is a multiple of requested size") \
1757 \
1758 product(bool, CMSLoopWarn, false, \
1759 "Warn in case of excessive CMS looping") \
1760 \
1761 develop(bool, CMSOverflowEarlyRestoration, false, \
1762 "Restore preserved marks early") \
1763 \
1764 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1765 "Size of marking stack") \
1766 \
1767 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1768 "Maximum size of marking stack") \
1769 \
1770 notproduct(bool, CMSMarkStackOverflowALot, false, \
1771 "Simulate frequent marking stack / work queue overflow") \
1772 \
1773 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1774 "An \"interval\" counter that determines how frequently " \
1775 "to simulate overflow; a smaller number increases frequency") \
1776 \
1777 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1778 "(Temporary, subject to experimentation) " \
1779 "Maximum number of abortable preclean iterations, if > 0") \
1780 \
1781 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1782 "(Temporary, subject to experimentation) " \
1783 "Maximum time in abortable preclean (in milliseconds)") \
1784 \
1785 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1786 "(Temporary, subject to experimentation) " \
1787 "Nominal minimum work per abortable preclean iteration") \
1788 \
1789 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
1790 "(Temporary, subject to experimentation) " \
1791 "Time that we sleep between iterations when not given " \
1792 "enough work per iteration") \
1793 \
1794 product(uintx, CMSRescanMultiple, 32, \
1795 "Size (in cards) of CMS parallel rescan task") \
1796 \
1797 product(uintx, CMSConcMarkMultiple, 32, \
1798 "Size (in cards) of CMS concurrent MT marking task") \
1799 \
1800 product(bool, CMSAbortSemantics, false, \
1801 "Whether abort-on-overflow semantics is implemented") \
1802 \
1803 product(bool, CMSParallelInitialMarkEnabled, true, \
1804 "Use the parallel initial mark.") \
1805 \
1806 product(bool, CMSParallelRemarkEnabled, true, \
1807 "Whether parallel remark enabled (only if ParNewGC)") \
1808 \
1809 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1810 "Whether parallel remark of survivor space " \
1811 "enabled (effective only if CMSParallelRemarkEnabled)") \
1812 \
1813 product(bool, CMSPLABRecordAlways, true, \
1814 "Always record survivor space PLAB boundaries (effective only " \
1815 "if CMSParallelSurvivorRemarkEnabled)") \
1816 \
1817 product(bool, CMSEdenChunksRecordAlways, true, \
1818 "Always record eden chunks used for the parallel initial mark " \
1819 "or remark of eden") \
1820 \
1821 product(bool, CMSPrintEdenSurvivorChunks, false, \
1822 "Print the eden and the survivor chunks used for the parallel " \
1823 "initial mark or remark of the eden/survivor spaces") \
1824 \
1825 product(bool, CMSConcurrentMTEnabled, true, \
1826 "Whether multi-threaded concurrent work enabled " \
1827 "(effective only if ParNewGC)") \
1828 \
1829 product(bool, CMSPrecleaningEnabled, true, \
1830 "Whether concurrent precleaning enabled") \
1831 \
1832 product(uintx, CMSPrecleanIter, 3, \
1833 "Maximum number of precleaning iteration passes") \
1834 \
1835 product(uintx, CMSPrecleanNumerator, 2, \
1836 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1837 "ratio") \
1838 \
1839 product(uintx, CMSPrecleanDenominator, 3, \
1840 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1841 "ratio") \
1842 \
1843 product(bool, CMSPrecleanRefLists1, true, \
1844 "Preclean ref lists during (initial) preclean phase") \
1845 \
1846 product(bool, CMSPrecleanRefLists2, false, \
1847 "Preclean ref lists during abortable preclean phase") \
1848 \
1849 product(bool, CMSPrecleanSurvivors1, false, \
1850 "Preclean survivors during (initial) preclean phase") \
1851 \
1852 product(bool, CMSPrecleanSurvivors2, true, \
1853 "Preclean survivors during abortable preclean phase") \
1854 \
1855 product(uintx, CMSPrecleanThreshold, 1000, \
1856 "Do not iterate again if number of dirty cards is less than this")\
1857 \
1858 product(bool, CMSCleanOnEnter, true, \
1859 "Clean-on-enter optimization for reducing number of dirty cards") \
1860 \
1861 product(uintx, CMSRemarkVerifyVariant, 1, \
1862 "Choose variant (1,2) of verification following remark") \
1863 \
1864 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1865 "If Eden size is below this, do not try to schedule remark") \
1866 \
1867 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1868 "The Eden occupancy percentage (0-100) at which " \
1869 "to try and schedule remark pause") \
1870 \
1871 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1872 "Start sampling eden top at least before young gen " \
1873 "occupancy reaches 1/<ratio> of the size at which " \
1874 "we plan to schedule remark") \
1875 \
1876 product(uintx, CMSSamplingGrain, 16*K, \
1877 "The minimum distance between eden samples for CMS (see above)") \
1878 \
1879 product(bool, CMSScavengeBeforeRemark, false, \
1880 "Attempt scavenge before the CMS remark step") \
1881 \
1882 develop(bool, CMSTraceSweeper, false, \
1883 "Trace some actions of the CMS sweeper") \
1884 \
1885 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1886 "Don't drain below this size per parallel worker/thief") \
1887 \
1888 manageable(intx, CMSWaitDuration, 2000, \
1889 "Time in milliseconds that CMS thread waits for young GC") \
1890 \
1891 develop(uintx, CMSCheckInterval, 1000, \
1892 "Interval in milliseconds that CMS thread checks if it " \
1893 "should start a collection cycle") \
1894 \
1895 product(bool, CMSYield, true, \
1896 "Yield between steps of CMS") \
1897 \
1898 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1899 "Bitmap operations should process at most this many bits " \
1900 "between yields") \
1901 \
1902 product(bool, CMSDumpAtPromotionFailure, false, \
1903 "Dump useful information about the state of the CMS old " \
1904 "generation upon a promotion failure") \
1905 \
1906 product(bool, CMSPrintChunksInDump, false, \
1907 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1908 "more detailed information about the free chunks") \
1909 \
1910 product(bool, CMSPrintObjectsInDump, false, \
1911 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1912 "more detailed information about the allocated objects") \
1913 \
1914 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1915 "Verify that all references across the FLS boundary " \
1916 "are to valid objects") \
1917 \
1918 diagnostic(bool, FLSVerifyLists, false, \
1919 "Do lots of (expensive) FreeListSpace verification") \
1920 \
1921 diagnostic(bool, FLSVerifyIndexTable, false, \
1922 "Do lots of (expensive) FLS index table verification") \
1923 \
1924 develop(bool, FLSVerifyDictionary, false, \
1925 "Do lots of (expensive) FLS dictionary verification") \
1926 \
1927 develop(bool, VerifyBlockOffsetArray, false, \
1928 "Do (expensive) block offset array verification") \
1929 \
1930 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
1931 "Maintain _unallocated_block in BlockOffsetArray " \
1932 "(currently applicable only to CMS collector)") \
1933 \
1934 develop(bool, TraceCMSState, false, \
1935 "Trace the state of the CMS collection") \
1936 \
1937 product(intx, RefDiscoveryPolicy, 0, \
1938 "Select type of reference discovery policy: " \
1939 "reference-based(0) or referent-based(1)") \
1940 \
1941 product(bool, ParallelRefProcEnabled, false, \
1942 "Enable parallel reference processing whenever possible") \
1943 \
1944 product(bool, ParallelRefProcBalancingEnabled, true, \
1945 "Enable balancing of reference processing queues") \
1946 \
1947 product(uintx, CMSTriggerRatio, 80, \
1948 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1949 "allocated before a CMS collection cycle commences") \
1950 \
1951 product(uintx, CMSBootstrapOccupancy, 50, \
1952 "Percentage CMS generation occupancy at which to " \
1953 "initiate CMS collection for bootstrapping collection stats") \
1954 \
1955 product(intx, CMSInitiatingOccupancyFraction, -1, \
1956 "Percentage CMS generation occupancy to start a CMS collection " \
1957 "cycle. A negative value means that CMSTriggerRatio is used") \
1958 \
1959 product(uintx, InitiatingHeapOccupancyPercent, 45, \
1960 "Percentage of the (entire) heap occupancy to start a " \
1961 "concurrent GC cycle. It is used by GCs that trigger a " \
1962 "concurrent GC cycle based on the occupancy of the entire heap, " \
1963 "not just one of the generations (e.g., G1). A value of 0 " \
1964 "denotes 'do constant GC cycles'.") \
1965 \
1966 manageable(intx, CMSTriggerInterval, -1, \
1967 "Commence a CMS collection cycle (at least) every so many " \
1968 "milliseconds (0 permanently, -1 disabled)") \
1969 \
1970 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1971 "Only use occupancy as a criterion for starting a CMS collection")\
1972 \
1973 product(uintx, CMSIsTooFullPercentage, 98, \
1974 "An absolute ceiling above which CMS will always consider the " \
1975 "unloading of classes when class unloading is enabled") \
1976 \
1977 develop(bool, CMSTestInFreeList, false, \
1978 "Check if the coalesced range is already in the " \
1979 "free lists as claimed") \
1980 \
1981 notproduct(bool, CMSVerifyReturnedBytes, false, \
1982 "Check that all the garbage collected was returned to the " \
1983 "free lists") \
1984 \
1985 notproduct(bool, ScavengeALot, false, \
1986 "Force scavenge at every Nth exit from the runtime system " \
1987 "(N=ScavengeALotInterval)") \
1988 \
1989 develop(bool, FullGCALot, false, \
1990 "Force full gc at every Nth exit from the runtime system " \
1991 "(N=FullGCALotInterval)") \
1992 \
1993 notproduct(bool, GCALotAtAllSafepoints, false, \
1994 "Enforce ScavengeALot/GCALot at all potential safepoints") \
1995 \
1996 product(bool, PrintPromotionFailure, false, \
1997 "Print additional diagnostic information following " \
1998 "promotion failure") \
1999 \
2000 notproduct(bool, PromotionFailureALot, false, \
2001 "Use promotion failure handling on every youngest generation " \
2002 "collection") \
2003 \
2004 develop(uintx, PromotionFailureALotCount, 1000, \
2005 "Number of promotion failures occurring at ParGCAllocBuffer " \
2006 "refill attempts (ParNew) or promotion attempts " \
2007 "(other young collectors)") \
2008 \
2009 develop(uintx, PromotionFailureALotInterval, 5, \
2010 "Total collections between promotion failures alot") \
2011 \
2012 experimental(uintx, WorkStealingSleepMillis, 1, \
2013 "Sleep time when sleep is used for yields") \
2014 \
2015 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \
2016 "Number of yields before a sleep is done during workstealing") \
2017 \
2018 experimental(uintx, WorkStealingHardSpins, 4096, \
2019 "Number of iterations in a spin loop between checks on " \
2020 "time out of hard spin") \
2021 \
2022 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \
2023 "Ratio of hard spins to calls to yield") \
2024 \
2025 develop(uintx, ObjArrayMarkingStride, 2048, \
2026 "Number of object array elements to push onto the marking stack " \
2027 "before pushing a continuation entry") \
2028 \
2029 develop(bool, MetadataAllocationFailALot, false, \
2030 "Fail metadata allocations at intervals controlled by " \
2031 "MetadataAllocationFailALotInterval") \
2032 \
2033 develop(uintx, MetadataAllocationFailALotInterval, 1000, \
2034 "Metadata allocation failure a lot interval") \
2035 \
2036 develop(bool, TraceMetadataChunkAllocation, false, \
2037 "Trace chunk metadata allocations") \
2038 \
2039 product(bool, TraceMetadataHumongousAllocation, false, \
2040 "Trace humongous metadata allocations") \
2041 \
2042 develop(bool, TraceMetavirtualspaceAllocation, false, \
2043 "Trace virtual space metadata allocations") \
2044 \
2045 notproduct(bool, ExecuteInternalVMTests, false, \
2046 "Enable execution of internal VM tests") \
2047 \
2048 notproduct(bool, VerboseInternalVMTests, false, \
2049 "Turn on logging for internal VM tests.") \
2050 \
2051 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
2052 \
2053 product_pd(bool, ResizeTLAB, \
2054 "Dynamically resize TLAB size for threads") \
2055 \
2056 product(bool, ZeroTLAB, false, \
2057 "Zero out the newly created TLAB") \
2058 \
2059 product(bool, FastTLABRefill, true, \
2060 "Use fast TLAB refill code") \
2061 \
2062 product(bool, PrintTLAB, false, \
2063 "Print various TLAB related information") \
2064 \
2065 product(bool, TLABStats, true, \
2066 "Provide more detailed and expensive TLAB statistics " \
2067 "(with PrintTLAB)") \
2068 \
2069 product_pd(bool, NeverActAsServerClassMachine, \
2070 "Never act like a server-class machine") \
2071 \
2072 product(bool, AlwaysActAsServerClassMachine, false, \
2073 "Always act like a server-class machine") \
2074 \
2075 product_pd(uint64_t, MaxRAM, \
2076 "Real memory size (in bytes) used to set maximum heap size") \
2077 \
2078 product(bool, AggressiveHeap, false, \
2079 "Optimize heap options for long-running memory intensive apps") \
2080 \
2081 product(uintx, ErgoHeapSizeLimit, 0, \
2082 "Maximum ergonomically set heap size (in bytes); zero means use " \
2083 "MaxRAM * MaxRAMPercentage / 100") \
2084 \
2085 experimental(bool, UseCGroupMemoryLimitForHeap, false, \
2086 "Use CGroup memory limit as physical memory limit for heap " \
2087 "sizing" \
2088 "Deprecated, replaced by container support") \
2089 \
2090 diagnostic(bool, PrintContainerInfo, false, \
2091 "Print container related information") \
2092 \
2093 diagnostic(bool, PrintActiveCpus, false, \
2094 "Print the number of CPUs detected in os::active_processor_count") \
2095 \
2096 product(uintx, MaxRAMFraction, 4, \
2097 "Maximum fraction (1/n) of real memory used for maximum heap " \
2098 "size") \
2099 \
2100 product(uintx, DefaultMaxRAMFraction, 4, \
2101 "Maximum fraction (1/n) of real memory used for maximum heap " \
2102 "size; deprecated: to be renamed to MaxRAMFraction") \
2103 \
2104 product(uintx, MinRAMFraction, 2, \
2105 "Minimum fraction (1/n) of real memory used for maxmimum heap " \
2106 "size on systems with small physical memory size") \
2107 \
2108 product(uintx, InitialRAMFraction, 64, \
2109 "Fraction (1/n) of real memory used for initial heap size") \
2110 \
2111 product(double, MaxRAMPercentage, 25.0, \
2112 "Maximum percentage of real memory used for maximum heap size") \
2113 \
2114 product(double, MinRAMPercentage, 50.0, \
2115 "Minimum percentage of real memory used for maximum heap" \
2116 "size on systems with small physical memory size") \
2117 \
2118 product(double, InitialRAMPercentage, 1.5625, \
2119 "Percentage of real memory used for initial heap size") \
2120 \
2121 product(intx, ActiveProcessorCount, -1, \
2122 "Specify the CPU count the VM should use and report as active") \
2123 \
2124 develop(uintx, MaxVirtMemFraction, 2, \
2125 "Maximum fraction (1/n) of virtual memory used for ergonomically "\
2126 "determining maximum heap size") \
2127 \
2128 product(bool, UseAutoGCSelectPolicy, false, \
2129 "Use automatic collection selection policy") \
2130 \
2131 product(uintx, AutoGCSelectPauseMillis, 5000, \
2132 "Automatic GC selection pause threshold in milliseconds") \
2133 \
2134 product(bool, UseAdaptiveSizePolicy, true, \
2135 "Use adaptive generation sizing policies") \
2136 \
2137 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
2138 "Use adaptive survivor sizing policies") \
2139 \
2140 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
2141 "Use adaptive young-old sizing policies at minor collections") \
2142 \
2143 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
2144 "Use adaptive young-old sizing policies at major collections") \
2145 \
2146 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
2147 "Include statistics from System.gc() for adaptive size policy") \
2148 \
2149 product(bool, UseAdaptiveGCBoundary, false, \
2150 "Allow young-old boundary to move") \
2151 \
2152 develop(bool, TraceAdaptiveGCBoundary, false, \
2153 "Trace young-old boundary moves") \
2154 \
2155 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
2156 "Resize the virtual spaces of the young or old generations") \
2157 \
2158 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
2159 "Policy for changing generation size for throughput goals") \
2160 \
2161 product(uintx, AdaptiveSizePausePolicy, 0, \
2162 "Policy for changing generation size for pause goals") \
2163 \
2164 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
2165 "Adjust tenured generation to achieve a minor pause goal") \
2166 \
2167 develop(bool, PSAdjustYoungGenForMajorPause, false, \
2168 "Adjust young generation to achieve a major pause goal") \
2169 \
2170 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
2171 "Number of steps where heuristics is used before data is used") \
2172 \
2173 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
2174 "Number of collections before the adaptive sizing is started") \
2175 \
2176 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
2177 "Collection interval for printing information; zero means never") \
2178 \
2179 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
2180 "Use adaptive minimum footprint as a goal") \
2181 \
2182 product(uintx, AdaptiveSizePolicyWeight, 10, \
2183 "Weight given to exponential resizing, between 0 and 100") \
2184 \
2185 product(uintx, AdaptiveTimeWeight, 25, \
2186 "Weight given to time in adaptive policy, between 0 and 100") \
2187 \
2188 product(uintx, PausePadding, 1, \
2189 "How much buffer to keep for pause time") \
2190 \
2191 product(uintx, PromotedPadding, 3, \
2192 "How much buffer to keep for promotion failure") \
2193 \
2194 product(uintx, SurvivorPadding, 3, \
2195 "How much buffer to keep for survivor overflow") \
2196 \
2197 product(uintx, ThresholdTolerance, 10, \
2198 "Allowed collection cost difference between generations") \
2199 \
2200 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
2201 "If collection costs are within margin, reduce both by full " \
2202 "delta") \
2203 \
2204 product(uintx, YoungGenerationSizeIncrement, 20, \
2205 "Adaptive size percentage change in young generation") \
2206 \
2207 product(uintx, YoungGenerationSizeSupplement, 80, \
2208 "Supplement to YoungedGenerationSizeIncrement used at startup") \
2209 \
2210 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
2211 "Decay factor to YoungedGenerationSizeSupplement") \
2212 \
2213 product(uintx, TenuredGenerationSizeIncrement, 20, \
2214 "Adaptive size percentage change in tenured generation") \
2215 \
2216 product(uintx, TenuredGenerationSizeSupplement, 80, \
2217 "Supplement to TenuredGenerationSizeIncrement used at startup") \
2218 \
2219 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
2220 "Decay factor to TenuredGenerationSizeIncrement") \
2221 \
2222 product(uintx, MaxGCPauseMillis, max_uintx, \
2223 "Adaptive size policy maximum GC pause time goal in millisecond, "\
2224 "or (G1 Only) the maximum GC time per MMU time slice") \
2225 \
2226 product(uintx, GCPauseIntervalMillis, 0, \
2227 "Time slice for MMU specification") \
2228 \
2229 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
2230 "Adaptive size policy maximum GC minor pause time goal " \
2231 "in millisecond") \
2232 \
2233 product(uintx, GCTimeRatio, 99, \
2234 "Adaptive size policy application time to GC time ratio") \
2235 \
2236 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
2237 "Adaptive size scale down factor for shrinking") \
2238 \
2239 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
2240 "Adaptive size decays the major cost for long major intervals") \
2241 \
2242 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
2243 "Time scale over which major costs decay") \
2244 \
2245 product(uintx, MinSurvivorRatio, 3, \
2246 "Minimum ratio of young generation/survivor space size") \
2247 \
2248 product(uintx, InitialSurvivorRatio, 8, \
2249 "Initial ratio of young generation/survivor space size") \
2250 \
2251 product(uintx, BaseFootPrintEstimate, 256*M, \
2252 "Estimate of footprint other than Java Heap") \
2253 \
2254 product(bool, UseGCOverheadLimit, true, \
2255 "Use policy to limit of proportion of time spent in GC " \
2256 "before an OutOfMemory error is thrown") \
2257 \
2258 product(uintx, GCTimeLimit, 98, \
2259 "Limit of the proportion of time spent in GC before " \
2260 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \
2261 \
2262 product(uintx, GCHeapFreeLimit, 2, \
2263 "Minimum percentage of free space after a full GC before an " \
2264 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
2265 \
2266 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
2267 "Number of consecutive collections before gc time limit fires") \
2268 \
2269 product(bool, PrintAdaptiveSizePolicy, false, \
2270 "Print information about AdaptiveSizePolicy") \
2271 \
2272 product(intx, PrefetchCopyIntervalInBytes, -1, \
2273 "How far ahead to prefetch destination area (<= 0 means off)") \
2274 \
2275 product(intx, PrefetchScanIntervalInBytes, -1, \
2276 "How far ahead to prefetch scan area (<= 0 means off)") \
2277 \
2278 product(intx, PrefetchFieldsAhead, -1, \
2279 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2280 \
2281 diagnostic(bool, VerifySilently, false, \
2282 "Do not print the verification progress") \
2283 \
2284 diagnostic(bool, VerifyDuringStartup, false, \
2285 "Verify memory system before executing any Java code " \
2286 "during VM initialization") \
2287 \
2288 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2289 "Verify system before exiting") \
2290 \
2291 diagnostic(bool, VerifyBeforeGC, false, \
2292 "Verify memory system before GC") \
2293 \
2294 diagnostic(bool, VerifyAfterGC, false, \
2295 "Verify memory system after GC") \
2296 \
2297 diagnostic(bool, VerifyDuringGC, false, \
2298 "Verify memory system during GC (between phases)") \
2299 \
2300 diagnostic(ccstrlist, VerifySubSet, "", \
2301 "Memory sub-systems to verify when Verify*GC flag(s) " \
2302 "are enabled. One or more sub-systems can be specified " \
2303 "in a comma separated string. Sub-systems are: " \
2304 "threads, heap, symbol_table, string_table, codecache, " \
2305 "dictionary, classloader_data_graph, metaspace, jni_handles, " \
2306 "c-heap, codecache_oops") \
2307 \
2308 diagnostic(bool, GCParallelVerificationEnabled, true, \
2309 "Enable parallel memory system verification") \
2310 \
2311 diagnostic(bool, DeferInitialCardMark, false, \
2312 "When +ReduceInitialCardMarks, explicitly defer any that " \
2313 "may arise from new_pre_store_barrier") \
2314 \
2315 diagnostic(bool, VerifyRememberedSets, false, \
2316 "Verify GC remembered sets") \
2317 \
2318 diagnostic(bool, VerifyObjectStartArray, true, \
2319 "Verify GC object start array if verify before/after") \
2320 \
2321 product(bool, DisableExplicitGC, false, \
2322 "Ignore calls to System.gc()") \
2323 \
2324 notproduct(bool, CheckMemoryInitialization, false, \
2325 "Check memory initialization") \
2326 \
2327 product(bool, CollectGen0First, false, \
2328 "Collect youngest generation before each full GC") \
2329 \
2330 diagnostic(bool, BindCMSThreadToCPU, false, \
2331 "Bind CMS Thread to CPU if possible") \
2332 \
2333 diagnostic(uintx, CPUForCMSThread, 0, \
2334 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2335 \
2336 product(bool, BindGCTaskThreadsToCPUs, false, \
2337 "Bind GCTaskThreads to CPUs if possible") \
2338 \
2339 product(bool, UseGCTaskAffinity, false, \
2340 "Use worker affinity when asking for GCTasks") \
2341 \
2342 product(uintx, ProcessDistributionStride, 4, \
2343 "Stride through processors when distributing processes") \
2344 \
2345 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2346 "Number of times the coordinator GC thread will sleep while " \
2347 "yielding before giving up and resuming GC") \
2348 \
2349 product(uintx, CMSYieldSleepCount, 0, \
2350 "Number of times a GC thread (minus the coordinator) " \
2351 "will sleep while yielding before giving up and resuming GC") \
2352 \
2353 /* gc tracing */ \
2354 manageable(bool, PrintGC, false, \
2355 "Print message at garbage collection") \
2356 \
2357 manageable(bool, PrintGCDetails, false, \
2358 "Print more details at garbage collection") \
2359 \
2360 manageable(bool, PrintGCDateStamps, false, \
2361 "Print date stamps at garbage collection") \
2362 \
2363 manageable(bool, PrintGCTimeStamps, false, \
2364 "Print timestamps at garbage collection") \
2365 \
2366 manageable(bool, PrintGCID, false, \
2367 "Print an identifier for each garbage collection") \
2368 \
2369 product(bool, PrintGCTaskTimeStamps, false, \
2370 "Print timestamps for individual gc worker thread tasks") \
2371 \
2372 develop(intx, ConcGCYieldTimeout, 0, \
2373 "If non-zero, assert that GC threads yield within this " \
2374 "number of milliseconds") \
2375 \
2376 notproduct(bool, TraceMarkSweep, false, \
2377 "Trace mark sweep") \
2378 \
2379 product(bool, PrintReferenceGC, false, \
2380 "Print times spent handling reference objects during GC " \
2381 "(enabled only when PrintGCDetails)") \
2382 \
2383 develop(bool, TraceReferenceGC, false, \
2384 "Trace handling of soft/weak/final/phantom references") \
2385 \
2386 develop(bool, TraceFinalizerRegistration, false, \
2387 "Trace registration of final references") \
2388 \
2389 notproduct(bool, TraceScavenge, false, \
2390 "Trace scavenge") \
2391 \
2392 product(bool, IgnoreEmptyClassPaths, false, \
2393 "Ignore empty path elements in -classpath") \
2394 \
2395 product(bool, TraceClassPaths, false, \
2396 "Trace processing of class paths") \
2397 \
2398 product_rw(bool, TraceClassLoading, false, \
2399 "Trace all classes loaded") \
2400 \
2401 product(bool, TraceClassLoadingPreorder, false, \
2402 "Trace all classes loaded in order referenced (not loaded)") \
2403 \
2404 product_rw(bool, TraceClassUnloading, false, \
2405 "Trace unloading of classes") \
2406 \
2407 product_rw(bool, TraceLoaderConstraints, false, \
2408 "Trace loader constraints") \
2409 \
2410 develop(bool, TraceClassLoaderData, false, \
2411 "Trace class loader loader_data lifetime") \
2412 \
2413 product(uintx, InitialBootClassLoaderMetaspaceSize, \
2414 NOT_LP64(2200*K) LP64_ONLY(4*M), \
2415 "Initial size of the boot class loader data metaspace") \
2416 \
2417 product(bool, TraceGen0Time, false, \
2418 "Trace accumulated time for Gen 0 collection") \
2419 \
2420 product(bool, TraceGen1Time, false, \
2421 "Trace accumulated time for Gen 1 collection") \
2422 \
2423 product(bool, PrintTenuringDistribution, false, \
2424 "Print tenuring age information") \
2425 \
2426 product_rw(bool, PrintHeapAtGC, false, \
2427 "Print heap layout before and after each GC") \
2428 \
2429 product_rw(bool, PrintHeapAtGCExtended, false, \
2430 "Print extended information about the layout of the heap " \
2431 "when -XX:+PrintHeapAtGC is set") \
2432 \
2433 product(bool, PrintHeapAtSIGBREAK, true, \
2434 "Print heap layout in response to SIGBREAK") \
2435 \
2436 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
2437 "Print a class histogram before any major stop-world GC") \
2438 \
2439 manageable(bool, PrintClassHistogramAfterFullGC, false, \
2440 "Print a class histogram after any major stop-world GC") \
2441 \
2442 manageable(bool, PrintClassHistogram, false, \
2443 "Print a histogram of class instances") \
2444 \
2445 develop(bool, TraceWorkGang, false, \
2446 "Trace activities of work gangs") \
2447 \
2448 product(bool, TraceParallelOldGCTasks, false, \
2449 "Trace multithreaded GC activity") \
2450 \
2451 develop(bool, TraceBlockOffsetTable, false, \
2452 "Print BlockOffsetTable maps") \
2453 \
2454 develop(bool, TraceCardTableModRefBS, false, \
2455 "Print CardTableModRefBS maps") \
2456 \
2457 develop(bool, TraceGCTaskManager, false, \
2458 "Trace actions of the GC task manager") \
2459 \
2460 develop(bool, TraceGCTaskQueue, false, \
2461 "Trace actions of the GC task queues") \
2462 \
2463 diagnostic(bool, TraceGCTaskThread, false, \
2464 "Trace actions of the GC task threads") \
2465 \
2466 product(bool, PrintParallelOldGCPhaseTimes, false, \
2467 "Print the time taken by each phase in ParallelOldGC " \
2468 "(PrintGCDetails must also be enabled)") \
2469 \
2470 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2471 "Trace marking phase in ParallelOldGC") \
2472 \
2473 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2474 "Trace summary phase in ParallelOldGC") \
2475 \
2476 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2477 "Trace compaction phase in ParallelOldGC") \
2478 \
2479 develop(bool, TraceParallelOldGCDensePrefix, false, \
2480 "Trace dense prefix computation for ParallelOldGC") \
2481 \
2482 develop(bool, IgnoreLibthreadGPFault, false, \
2483 "Suppress workaround for libthread GP fault") \
2484 \
2485 product(bool, PrintJNIGCStalls, false, \
2486 "Print diagnostic message when GC is stalled " \
2487 "by JNI critical section") \
2488 \
2489 experimental(double, ObjectCountCutOffPercent, 0.5, \
2490 "The percentage of the used heap that the instances of a class " \
2491 "must occupy for the class to generate a trace event") \
2492 \
2493 /* GC log rotation setting */ \
2494 \
2495 product(bool, UseGCLogFileRotation, false, \
2496 "Rotate gclog files (for long running applications). It requires "\
2497 "-Xloggc:<filename>") \
2498 \
2499 product(uintx, NumberOfGCLogFiles, 0, \
2500 "Number of gclog files in rotation " \
2501 "(default: 0, no rotation)") \
2502 \
2503 product(uintx, GCLogFileSize, 8*K, \
2504 "GC log file size, requires UseGCLogFileRotation. " \
2505 "Set to 0 to only trigger rotation via jcmd") \
2506 \
2507 /* JVMTI heap profiling */ \
2508 \
2509 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2510 "Trace JVMTI object tagging calls") \
2511 \
2512 diagnostic(bool, VerifyBeforeIteration, false, \
2513 "Verify memory system before JVMTI iteration") \
2514 \
2515 /* compiler interface */ \
2516 \
2517 develop(bool, CIPrintCompilerName, false, \
2518 "when CIPrint is active, print the name of the active compiler") \
2519 \
2520 develop(bool, CIPrintCompileQueue, false, \
2521 "display the contents of the compile queue whenever a " \
2522 "compilation is enqueued") \
2523 \
2524 develop(bool, CIPrintRequests, false, \
2525 "display every request for compilation") \
2526 \
2527 product(bool, CITime, false, \
2528 "collect timing information for compilation") \
2529 \
2530 develop(bool, CITimeEach, false, \
2531 "display timing information after each successful compilation") \
2532 \
2533 develop(bool, CICountOSR, false, \
2534 "use a separate counter when assigning ids to osr compilations") \
2535 \
2536 develop(bool, CICompileNatives, true, \
2537 "compile native methods if supported by the compiler") \
2538 \
2539 develop_pd(bool, CICompileOSR, \
2540 "compile on stack replacement methods if supported by the " \
2541 "compiler") \
2542 \
2543 develop(bool, CIPrintMethodCodes, false, \
2544 "print method bytecodes of the compiled code") \
2545 \
2546 develop(bool, CIPrintTypeFlow, false, \
2547 "print the results of ciTypeFlow analysis") \
2548 \
2549 develop(bool, CITraceTypeFlow, false, \
2550 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2551 \
2552 develop(intx, OSROnlyBCI, -1, \
2553 "OSR only at this bci. Negative values mean exclude that bci") \
2554 \
2555 /* compiler */ \
2556 \
2557 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2558 "Number of compiler threads to run") \
2559 \
2560 product(intx, CompilationPolicyChoice, 0, \
2561 "which compilation policy (0/1)") \
2562 \
2563 develop(bool, UseStackBanging, true, \
2564 "use stack banging for stack overflow checks (required for " \
2565 "proper StackOverflow handling; disable only to measure cost " \
2566 "of stackbanging)") \
2567 \
2568 develop(bool, UseStrictFP, true, \
2569 "use strict fp if modifier strictfp is set") \
2570 \
2571 develop(bool, GenerateSynchronizationCode, true, \
2572 "generate locking/unlocking code for synchronized methods and " \
2573 "monitors") \
2574 \
2575 develop(bool, GenerateCompilerNullChecks, true, \
2576 "Generate explicit null checks for loads/stores/calls") \
2577 \
2578 develop(bool, GenerateRangeChecks, true, \
2579 "Generate range checks for array accesses") \
2580 \
2581 develop_pd(bool, ImplicitNullChecks, \
2582 "Generate code for implicit null checks") \
2583 \
2584 product_pd(bool, TrapBasedNullChecks, \
2585 "Generate code for null checks that uses a cmp and trap " \
2586 "instruction raising SIGTRAP. This is only used if an access to" \
2587 "null (+offset) will not raise a SIGSEGV, i.e.," \
2588 "ImplicitNullChecks don't work (PPC64).") \
2589 \
2590 product(bool, PrintSafepointStatistics, false, \
2591 "Print statistics about safepoint synchronization") \
2592 \
2593 product(intx, PrintSafepointStatisticsCount, 300, \
2594 "Total number of safepoint statistics collected " \
2595 "before printing them out") \
2596 \
2597 product(intx, PrintSafepointStatisticsTimeout, -1, \
2598 "Print safepoint statistics only when safepoint takes " \
2599 "more than PrintSafepointSatisticsTimeout in millis") \
2600 \
2601 product(bool, TraceSafepointCleanupTime, false, \
2602 "Print the break down of clean up tasks performed during " \
2603 "safepoint") \
2604 \
2605 product(bool, Inline, true, \
2606 "Enable inlining") \
2607 \
2608 product(bool, ClipInlining, true, \
2609 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \
2610 \
2611 develop(bool, UseCHA, true, \
2612 "Enable CHA") \
2613 \
2614 product(bool, UseTypeProfile, true, \
2615 "Check interpreter profile for historically monomorphic calls") \
2616 \
2617 notproduct(bool, TimeCompiler, false, \
2618 "Time the compiler") \
2619 \
2620 diagnostic(bool, PrintInlining, false, \
2621 "Print inlining optimizations") \
2622 \
2623 product(bool, UsePopCountInstruction, false, \
2624 "Use population count instruction") \
2625 \
2626 develop(bool, EagerInitialization, false, \
2627 "Eagerly initialize classes if possible") \
2628 \
2629 develop(bool, TraceMethodReplacement, false, \
2630 "Print when methods are replaced do to recompilation") \
2631 \
2632 develop(bool, PrintMethodFlushing, false, \
2633 "Print the nmethods being flushed") \
2634 \
2635 diagnostic(bool, PrintMethodFlushingStatistics, false, \
2636 "print statistics about method flushing") \
2637 \
2638 develop(bool, UseRelocIndex, false, \
2639 "Use an index to speed random access to relocations") \
2640 \
2641 develop(bool, StressCodeBuffers, false, \
2642 "Exercise code buffer expansion and other rare state changes") \
2643 \
2644 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2645 "Generate extra debugging information for non-safepoints in " \
2646 "nmethods") \
2647 \
2648 product(bool, PrintVMOptions, false, \
2649 "Print flags that appeared on the command line") \
2650 \
2651 product(bool, IgnoreUnrecognizedVMOptions, false, \
2652 "Ignore unrecognized VM options") \
2653 \
2654 product(bool, PrintCommandLineFlags, false, \
2655 "Print flags specified on command line or set by ergonomics") \
2656 \
2657 product(bool, PrintFlagsInitial, false, \
2658 "Print all VM flags before argument processing and exit VM") \
2659 \
2660 product(bool, PrintFlagsFinal, false, \
2661 "Print all VM flags after argument and ergonomic processing") \
2662 \
2663 notproduct(bool, PrintFlagsWithComments, false, \
2664 "Print all VM flags with default values and descriptions and " \
2665 "exit") \
2666 \
2667 diagnostic(bool, SerializeVMOutput, true, \
2668 "Use a mutex to serialize output to tty and LogFile") \
2669 \
2670 diagnostic(bool, DisplayVMOutput, true, \
2671 "Display all VM output on the tty, independently of LogVMOutput") \
2672 \
2673 diagnostic(bool, LogVMOutput, false, \
2674 "Save VM output to LogFile") \
2675 \
2676 diagnostic(ccstr, LogFile, NULL, \
2677 "If LogVMOutput or LogCompilation is on, save VM output to " \
2678 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
2679 \
2680 product(ccstr, ErrorFile, NULL, \
2681 "If an error occurs, save the error data to this file " \
2682 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2683 \
2684 product(bool, DisplayVMOutputToStderr, false, \
2685 "If DisplayVMOutput is true, display all VM output to stderr") \
2686 \
2687 product(bool, DisplayVMOutputToStdout, false, \
2688 "If DisplayVMOutput is true, display all VM output to stdout") \
2689 \
2690 product(bool, UseHeavyMonitors, false, \
2691 "use heavyweight instead of lightweight Java monitors") \
2692 \
2693 product(bool, PrintStringTableStatistics, false, \
2694 "print statistics about the StringTable and SymbolTable") \
2695 \
2696 diagnostic(bool, VerifyStringTableAtExit, false, \
2697 "verify StringTable contents at exit") \
2698 \
2699 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2700 "print histogram of the symbol table") \
2701 \
2702 notproduct(bool, ExitVMOnVerifyError, false, \
2703 "standard exit from VM if bytecode verify error " \
2704 "(only in debug mode)") \
2705 \
2706 notproduct(ccstr, AbortVMOnException, NULL, \
2707 "Call fatal if this exception is thrown. Example: " \
2708 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2709 \
2710 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \
2711 "Call fatal if the exception pointed by AbortVMOnException " \
2712 "has this message") \
2713 \
2714 develop(bool, DebugVtables, false, \
2715 "add debugging code to vtable dispatch") \
2716 \
2717 develop(bool, PrintVtables, false, \
2718 "print vtables when printing klass") \
2719 \
2720 notproduct(bool, PrintVtableStats, false, \
2721 "print vtables stats at end of run") \
2722 \
2723 develop(bool, TraceCreateZombies, false, \
2724 "trace creation of zombie nmethods") \
2725 \
2726 notproduct(bool, IgnoreLockingAssertions, false, \
2727 "disable locking assertions (for speed)") \
2728 \
2729 product(bool, RangeCheckElimination, true, \
2730 "Eliminate range checks") \
2731 \
2732 develop_pd(bool, UncommonNullCast, \
2733 "track occurrences of null in casts; adjust compiler tactics") \
2734 \
2735 develop(bool, TypeProfileCasts, true, \
2736 "treat casts like calls for purposes of type profiling") \
2737 \
2738 develop(bool, DelayCompilationDuringStartup, true, \
2739 "Delay invoking the compiler until main application class is " \
2740 "loaded") \
2741 \
2742 develop(bool, CompileTheWorld, false, \
2743 "Compile all methods in all classes in bootstrap class path " \
2744 "(stress test)") \
2745 \
2746 develop(bool, CompileTheWorldPreloadClasses, true, \
2747 "Preload all classes used by a class before start loading") \
2748 \
2749 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2750 "Force a safepoint every n compiles so sweeper can keep up") \
2751 \
2752 develop(bool, FillDelaySlots, true, \
2753 "Fill delay slots (on SPARC only)") \
2754 \
2755 develop(bool, TimeLivenessAnalysis, false, \
2756 "Time computation of bytecode liveness analysis") \
2757 \
2758 develop(bool, TraceLivenessGen, false, \
2759 "Trace the generation of liveness analysis information") \
2760 \
2761 notproduct(bool, TraceLivenessQuery, false, \
2762 "Trace queries of liveness analysis information") \
2763 \
2764 notproduct(bool, CollectIndexSetStatistics, false, \
2765 "Collect information about IndexSets") \
2766 \
2767 develop(bool, UseLoopSafepoints, true, \
2768 "Generate Safepoint nodes in every loop") \
2769 \
2770 develop(intx, FastAllocateSizeLimit, 128*K, \
2771 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2772 "Inline allocations larger than this in doublewords must go slow")\
2773 \
2774 product(bool, AggressiveOpts, false, \
2775 "Enable aggressive optimizations - see arguments.cpp") \
2776 \
2777 product_pd(uintx, TypeProfileLevel, \
2778 "=XYZ, with Z: Type profiling of arguments at call; " \
2779 "Y: Type profiling of return value at call; " \
2780 "X: Type profiling of parameters to methods; " \
2781 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \
2782 \
2783 product(intx, TypeProfileArgsLimit, 2, \
2784 "max number of call arguments to consider for type profiling") \
2785 \
2786 product(intx, TypeProfileParmsLimit, 2, \
2787 "max number of incoming parameters to consider for type profiling"\
2788 ", -1 for all") \
2789 \
2790 /* statistics */ \
2791 develop(bool, CountCompiledCalls, false, \
2792 "Count method invocations") \
2793 \
2794 notproduct(bool, CountRuntimeCalls, false, \
2795 "Count VM runtime calls") \
2796 \
2797 develop(bool, CountJNICalls, false, \
2798 "Count jni method invocations") \
2799 \
2800 notproduct(bool, CountJVMCalls, false, \
2801 "Count jvm method invocations") \
2802 \
2803 notproduct(bool, CountRemovableExceptions, false, \
2804 "Count exceptions that could be replaced by branches due to " \
2805 "inlining") \
2806 \
2807 notproduct(bool, ICMissHistogram, false, \
2808 "Produce histogram of IC misses") \
2809 \
2810 notproduct(bool, PrintClassStatistics, false, \
2811 "Print class statistics at end of run") \
2812 \
2813 notproduct(bool, PrintMethodStatistics, false, \
2814 "Print method statistics at end of run") \
2815 \
2816 /* interpreter */ \
2817 develop(bool, ClearInterpreterLocals, false, \
2818 "Always clear local variables of interpreter activations upon " \
2819 "entry") \
2820 \
2821 product_pd(bool, RewriteBytecodes, \
2822 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2823 \
2824 product_pd(bool, RewriteFrequentPairs, \
2825 "Rewrite frequently used bytecode pairs into a single bytecode") \
2826 \
2827 diagnostic(bool, PrintInterpreter, false, \
2828 "Print the generated interpreter code") \
2829 \
2830 product(bool, UseInterpreter, true, \
2831 "Use interpreter for non-compiled methods") \
2832 \
2833 develop(bool, UseFastSignatureHandlers, true, \
2834 "Use fast signature handlers for native calls") \
2835 \
2836 product(bool, UseLoopCounter, true, \
2837 "Increment invocation counter on backward branch") \
2838 \
2839 product(bool, UseFastEmptyMethods, true, \
2840 "Use fast method entry code for empty methods") \
2841 \
2842 product(bool, UseFastAccessorMethods, true, \
2843 "Use fast method entry code for accessor methods") \
2844 \
2845 product_pd(bool, UseOnStackReplacement, \
2846 "Use on stack replacement, calls runtime if invoc. counter " \
2847 "overflows in loop") \
2848 \
2849 notproduct(bool, TraceOnStackReplacement, false, \
2850 "Trace on stack replacement") \
2851 \
2852 product_pd(bool, PreferInterpreterNativeStubs, \
2853 "Use always interpreter stubs for native methods invoked via " \
2854 "interpreter") \
2855 \
2856 develop(bool, CountBytecodes, false, \
2857 "Count number of bytecodes executed") \
2858 \
2859 develop(bool, PrintBytecodeHistogram, false, \
2860 "Print histogram of the executed bytecodes") \
2861 \
2862 develop(bool, PrintBytecodePairHistogram, false, \
2863 "Print histogram of the executed bytecode pairs") \
2864 \
2865 diagnostic(bool, PrintSignatureHandlers, false, \
2866 "Print code generated for native method signature handlers") \
2867 \
2868 develop(bool, VerifyOops, false, \
2869 "Do plausibility checks for oops") \
2870 \
2871 develop(bool, CheckUnhandledOops, false, \
2872 "Check for unhandled oops in VM code") \
2873 \
2874 develop(bool, VerifyJNIFields, trueInDebug, \
2875 "Verify jfieldIDs for instance fields") \
2876 \
2877 notproduct(bool, VerifyJNIEnvThread, false, \
2878 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2879 "from JNI") \
2880 \
2881 develop(bool, VerifyFPU, false, \
2882 "Verify FPU state (check for NaN's, etc.)") \
2883 \
2884 develop(bool, VerifyThread, false, \
2885 "Watch the thread register for corruption (SPARC only)") \
2886 \
2887 develop(bool, VerifyActivationFrameSize, false, \
2888 "Verify that activation frame didn't become smaller than its " \
2889 "minimal size") \
2890 \
2891 develop(bool, TraceFrequencyInlining, false, \
2892 "Trace frequency based inlining") \
2893 \
2894 develop_pd(bool, InlineIntrinsics, \
2895 "Inline intrinsics that can be statically resolved") \
2896 \
2897 product_pd(bool, ProfileInterpreter, \
2898 "Profile at the bytecode level during interpretation") \
2899 \
2900 develop(bool, TraceProfileInterpreter, false, \
2901 "Trace profiling at the bytecode level during interpretation. " \
2902 "This outputs the profiling information collected to improve " \
2903 "jit compilation.") \
2904 \
2905 develop_pd(bool, ProfileTraps, \
2906 "Profile deoptimization traps at the bytecode level") \
2907 \
2908 product(intx, ProfileMaturityPercentage, 20, \
2909 "number of method invocations/branches (expressed as % of " \
2910 "CompileThreshold) before using the method's profile") \
2911 \
2912 develop(bool, PrintMethodData, false, \
2913 "Print the results of +ProfileInterpreter at end of run") \
2914 \
2915 develop(bool, VerifyDataPointer, trueInDebug, \
2916 "Verify the method data pointer during interpreter profiling") \
2917 \
2918 develop(bool, VerifyCompiledCode, false, \
2919 "Include miscellaneous runtime verifications in nmethod code; " \
2920 "default off because it disturbs nmethod size heuristics") \
2921 \
2922 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2923 "Manually make GC thread crash then dump java stack trace; " \
2924 "Test only") \
2925 \
2926 /* compilation */ \
2927 product(bool, UseCompiler, true, \
2928 "Use Just-In-Time compilation") \
2929 \
2930 develop(bool, TraceCompilationPolicy, false, \
2931 "Trace compilation policy") \
2932 \
2933 develop(bool, TimeCompilationPolicy, false, \
2934 "Time the compilation policy") \
2935 \
2936 product(bool, UseCounterDecay, true, \
2937 "Adjust recompilation counters") \
2938 \
2939 develop(intx, CounterHalfLifeTime, 30, \
2940 "Half-life time of invocation counters (in seconds)") \
2941 \
2942 develop(intx, CounterDecayMinIntervalLength, 500, \
2943 "The minimum interval (in milliseconds) between invocation of " \
2944 "CounterDecay") \
2945 \
2946 product(bool, AlwaysCompileLoopMethods, false, \
2947 "When using recompilation, never interpret methods " \
2948 "containing loops") \
2949 \
2950 product(bool, DontCompileHugeMethods, true, \
2951 "Do not compile methods > HugeMethodLimit") \
2952 \
2953 /* Bytecode escape analysis estimation. */ \
2954 product(bool, EstimateArgEscape, true, \
2955 "Analyze bytecodes to estimate escape state of arguments") \
2956 \
2957 product(intx, BCEATraceLevel, 0, \
2958 "How much tracing to do of bytecode escape analysis estimates") \
2959 \
2960 product(intx, MaxBCEAEstimateLevel, 5, \
2961 "Maximum number of nested calls that are analyzed by BC EA") \
2962 \
2963 product(intx, MaxBCEAEstimateSize, 150, \
2964 "Maximum bytecode size of a method to be analyzed by BC EA") \
2965 \
2966 product(intx, AllocatePrefetchStyle, 1, \
2967 "0 = no prefetch, " \
2968 "1 = prefetch instructions for each allocation, " \
2969 "2 = use TLAB watermark to gate allocation prefetch, " \
2970 "3 = use BIS instruction on Sparc for allocation prefetch") \
2971 \
2972 product(intx, AllocatePrefetchDistance, -1, \
2973 "Distance to prefetch ahead of allocation pointer") \
2974 \
2975 product(intx, AllocatePrefetchLines, 3, \
2976 "Number of lines to prefetch ahead of array allocation pointer") \
2977 \
2978 product(intx, AllocateInstancePrefetchLines, 1, \
2979 "Number of lines to prefetch ahead of instance allocation " \
2980 "pointer") \
2981 \
2982 product(intx, AllocatePrefetchStepSize, 16, \
2983 "Step size in bytes of sequential prefetch instructions") \
2984 \
2985 product(intx, AllocatePrefetchInstr, 0, \
2986 "Prefetch instruction to prefetch ahead of allocation pointer") \
2987 \
2988 /* deoptimization */ \
2989 develop(bool, TraceDeoptimization, false, \
2990 "Trace deoptimization") \
2991 \
2992 develop(bool, DebugDeoptimization, false, \
2993 "Tracing various information while debugging deoptimization") \
2994 \
2995 product(intx, SelfDestructTimer, 0, \
2996 "Will cause VM to terminate after a given time (in minutes) " \
2997 "(0 means off)") \
2998 \
2999 product(intx, MaxJavaStackTraceDepth, 1024, \
3000 "The maximum number of lines in the stack trace for Java " \
3001 "exceptions (0 means all)") \
3002 \
3003 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
3004 "Guarantee a safepoint (at least) every so many milliseconds " \
3005 "(0 means none)")) \
3006 \
3007 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \
3008 "Guarantee a safepoint (at least) every so many milliseconds " \
3009 "(0 means none)")) \
3010 \
3011 product(intx, SafepointTimeoutDelay, 10000, \
3012 "Delay in milliseconds for option SafepointTimeout") \
3013 \
3014 product(intx, NmethodSweepFraction, 16, \
3015 "Number of invocations of sweeper to cover all nmethods") \
3016 \
3017 product(intx, NmethodSweepCheckInterval, 5, \
3018 "Compilers wake up every n seconds to possibly sweep nmethods") \
3019 \
3020 product(intx, NmethodSweepActivity, 10, \
3021 "Removes cold nmethods from code cache if > 0. Higher values " \
3022 "result in more aggressive sweeping") \
3023 \
3024 notproduct(bool, LogSweeper, false, \
3025 "Keep a ring buffer of sweeper activity") \
3026 \
3027 notproduct(intx, SweeperLogEntries, 1024, \
3028 "Number of records in the ring buffer of sweeper activity") \
3029 \
3030 notproduct(intx, MemProfilingInterval, 500, \
3031 "Time between each invocation of the MemProfiler") \
3032 \
3033 develop(intx, MallocCatchPtr, -1, \
3034 "Hit breakpoint when mallocing/freeing this pointer") \
3035 \
3036 notproduct(intx, AssertRepeat, 1, \
3037 "number of times to evaluate expression in assert " \
3038 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
3039 \
3040 notproduct(ccstrlist, SuppressErrorAt, "", \
3041 "List of assertions (file:line) to muzzle") \
3042 \
3043 notproduct(uintx, HandleAllocationLimit, 1024, \
3044 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
3045 "is used") \
3046 \
3047 develop(uintx, TotalHandleAllocationLimit, 1024, \
3048 "Threshold for total handle allocation when " \
3049 "+TraceHandleAllocation is used") \
3050 \
3051 develop(intx, StackPrintLimit, 100, \
3052 "number of stack frames to print in VM-level stack dump") \
3053 \
3054 notproduct(intx, MaxElementPrintSize, 256, \
3055 "maximum number of elements to print") \
3056 \
3057 notproduct(intx, MaxSubklassPrintSize, 4, \
3058 "maximum number of subklasses to print when printing klass") \
3059 \
3060 product(intx, MaxInlineLevel, 9, \
3061 "maximum number of nested calls that are inlined") \
3062 \
3063 product(intx, MaxRecursiveInlineLevel, 1, \
3064 "maximum number of nested recursive calls that are inlined") \
3065 \
3066 develop(intx, MaxForceInlineLevel, 100, \
3067 "maximum number of nested calls that are forced for inlining " \
3068 "(using CompilerOracle or marked w/ @ForceInline)") \
3069 \
3070 product_pd(intx, InlineSmallCode, \
3071 "Only inline already compiled methods if their code size is " \
3072 "less than this") \
3073 \
3074 product(intx, MaxInlineSize, 35, \
3075 "The maximum bytecode size of a method to be inlined") \
3076 \
3077 product_pd(intx, FreqInlineSize, \
3078 "The maximum bytecode size of a frequent method to be inlined") \
3079 \
3080 product(intx, MaxTrivialSize, 6, \
3081 "The maximum bytecode size of a trivial method to be inlined") \
3082 \
3083 product(intx, MinInliningThreshold, 250, \
3084 "The minimum invocation count a method needs to have to be " \
3085 "inlined") \
3086 \
3087 develop(intx, MethodHistogramCutoff, 100, \
3088 "The cutoff value for method invocation histogram (+CountCalls)") \
3089 \
3090 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
3091 "Number of interpreted methods to show in profile") \
3092 \
3093 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
3094 "Number of compiled methods to show in profile") \
3095 \
3096 develop(intx, ProfilerNumberOfStubMethods, 25, \
3097 "Number of stub methods to show in profile") \
3098 \
3099 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
3100 "Number of runtime stub nodes to show in profile") \
3101 \
3102 product(intx, ProfileIntervalsTicks, 100, \
3103 "Number of ticks between printing of interval profile " \
3104 "(+ProfileIntervals)") \
3105 \
3106 notproduct(intx, ScavengeALotInterval, 1, \
3107 "Interval between which scavenge will occur with +ScavengeALot") \
3108 \
3109 notproduct(intx, FullGCALotInterval, 1, \
3110 "Interval between which full gc will occur with +FullGCALot") \
3111 \
3112 notproduct(intx, FullGCALotStart, 0, \
3113 "For which invocation to start FullGCAlot") \
3114 \
3115 notproduct(intx, FullGCALotDummies, 32*K, \
3116 "Dummy object allocated with +FullGCALot, forcing all objects " \
3117 "to move") \
3118 \
3119 develop(intx, DontYieldALotInterval, 10, \
3120 "Interval between which yields will be dropped (milliseconds)") \
3121 \
3122 develop(intx, MinSleepInterval, 1, \
3123 "Minimum sleep() interval (milliseconds) when " \
3124 "ConvertSleepToYield is off (used for Solaris)") \
3125 \
3126 develop(intx, ProfilerPCTickThreshold, 15, \
3127 "Number of ticks in a PC buckets to be a hotspot") \
3128 \
3129 notproduct(intx, DeoptimizeALotInterval, 5, \
3130 "Number of exits until DeoptimizeALot kicks in") \
3131 \
3132 notproduct(intx, ZombieALotInterval, 5, \
3133 "Number of exits until ZombieALot kicks in") \
3134 \
3135 diagnostic(intx, MallocVerifyInterval, 0, \
3136 "If non-zero, verify C heap after every N calls to " \
3137 "malloc/realloc/free") \
3138 \
3139 diagnostic(intx, MallocVerifyStart, 0, \
3140 "If non-zero, start verifying C heap after Nth call to " \
3141 "malloc/realloc/free") \
3142 \
3143 diagnostic(uintx, MallocMaxTestWords, 0, \
3144 "If non-zero, maximum number of words that malloc/realloc can " \
3145 "allocate (for testing only)") \
3146 \
3147 product(intx, TypeProfileWidth, 2, \
3148 "Number of receiver types to record in call/cast profile") \
3149 \
3150 develop(intx, BciProfileWidth, 2, \
3151 "Number of return bci's to record in ret profile") \
3152 \
3153 product(intx, PerMethodRecompilationCutoff, 400, \
3154 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3155 \
3156 product(intx, PerBytecodeRecompilationCutoff, 200, \
3157 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
3158 \
3159 product(intx, PerMethodTrapLimit, 100, \
3160 "Limit on traps (of one kind) in a method (includes inlines)") \
3161 \
3162 experimental(intx, PerMethodSpecTrapLimit, 5000, \
3163 "Limit on speculative traps (of one kind) in a method (includes inlines)") \
3164 \
3165 product(intx, PerBytecodeTrapLimit, 4, \
3166 "Limit on traps (of one kind) at a particular BCI") \
3167 \
3168 experimental(intx, SpecTrapLimitExtraEntries, 3, \
3169 "Extra method data trap entries for speculation") \
3170 \
3171 develop(intx, InlineFrequencyRatio, 20, \
3172 "Ratio of call site execution to caller method invocation") \
3173 \
3174 develop_pd(intx, InlineFrequencyCount, \
3175 "Count of call site execution necessary to trigger frequent " \
3176 "inlining") \
3177 \
3178 develop(intx, InlineThrowCount, 50, \
3179 "Force inlining of interpreted methods that throw this often") \
3180 \
3181 develop(intx, InlineThrowMaxSize, 200, \
3182 "Force inlining of throwing methods smaller than this") \
3183 \
3184 develop(intx, ProfilerNodeSize, 1024, \
3185 "Size in K to allocate for the Profile Nodes of each thread") \
3186 \
3187 product_pd(intx, PreInflateSpin, \
3188 "Number of times to spin wait before inflation") \
3189 \
3190 /* gc parameters */ \
3191 product(uintx, InitialHeapSize, 0, \
3192 "Initial heap size (in bytes); zero means use ergonomics") \
3193 \
3194 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \
3195 "Maximum heap size (in bytes)") \
3196 \
3197 product(uintx, OldSize, ScaleForWordSize(4*M), \
3198 "Initial tenured generation size (in bytes)") \
3199 \
3200 product(uintx, NewSize, ScaleForWordSize(1*M), \
3201 "Initial new generation size (in bytes)") \
3202 \
3203 product(uintx, MaxNewSize, max_uintx, \
3204 "Maximum new generation size (in bytes), max_uintx means set " \
3205 "ergonomically") \
3206 \
3207 product(uintx, PretenureSizeThreshold, 0, \
3208 "Maximum size in bytes of objects allocated in DefNew " \
3209 "generation; zero means no maximum") \
3210 \
3211 product(uintx, TLABSize, 0, \
3212 "Starting TLAB size (in bytes); zero means set ergonomically") \
3213 \
3214 product(uintx, MinTLABSize, 2*K, \
3215 "Minimum allowed TLAB size (in bytes)") \
3216 \
3217 product(uintx, TLABAllocationWeight, 35, \
3218 "Allocation averaging weight") \
3219 \
3220 product(uintx, TLABWasteTargetPercent, 1, \
3221 "Percentage of Eden that can be wasted") \
3222 \
3223 product(uintx, TLABRefillWasteFraction, 64, \
3224 "Maximum TLAB waste at a refill (internal fragmentation)") \
3225 \
3226 product(uintx, TLABWasteIncrement, 4, \
3227 "Increment allowed waste at slow allocation") \
3228 \
3229 product(uintx, SurvivorRatio, 8, \
3230 "Ratio of eden/survivor space size") \
3231 \
3232 product(uintx, NewRatio, 2, \
3233 "Ratio of old/new generation sizes") \
3234 \
3235 product_pd(uintx, NewSizeThreadIncrease, \
3236 "Additional size added to desired new generation size per " \
3237 "non-daemon thread (in bytes)") \
3238 \
3239 product_pd(uintx, MetaspaceSize, \
3240 "Initial size of Metaspaces (in bytes)") \
3241 \
3242 product(uintx, MaxMetaspaceSize, max_uintx, \
3243 "Maximum size of Metaspaces (in bytes)") \
3244 \
3245 product(uintx, CompressedClassSpaceSize, 1*G, \
3246 "Maximum size of class area in Metaspace when compressed " \
3247 "class pointers are used") \
3248 \
3249 manageable(uintx, MinHeapFreeRatio, 40, \
3250 "The minimum percentage of heap free after GC to avoid expansion."\
3251 " For most GCs this applies to the old generation. In G1 and" \
3252 " ParallelGC it applies to the whole heap.") \
3253 \
3254 manageable(uintx, MaxHeapFreeRatio, 70, \
3255 "The maximum percentage of heap free after GC to avoid shrinking."\
3256 " For most GCs this applies to the old generation. In G1 and" \
3257 " ParallelGC it applies to the whole heap.") \
3258 \
3259 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
3260 "Number of milliseconds per MB of free space in the heap") \
3261 \
3262 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
3263 "The minimum change in heap space due to GC (in bytes)") \
3264 \
3265 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \
3266 "The minimum expansion of Metaspace (in bytes)") \
3267 \
3268 product(uintx, MinMetaspaceFreeRatio, 40, \
3269 "The minimum percentage of Metaspace free after GC to avoid " \
3270 "expansion") \
3271 \
3272 product(uintx, MaxMetaspaceFreeRatio, 70, \
3273 "The maximum percentage of Metaspace free after GC to avoid " \
3274 "shrinking") \
3275 \
3276 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \
3277 "The maximum expansion of Metaspace without full GC (in bytes)") \
3278 \
3279 product(uintx, QueuedAllocationWarningCount, 0, \
3280 "Number of times an allocation that queues behind a GC " \
3281 "will retry before printing a warning") \
3282 \
3283 diagnostic(uintx, VerifyGCStartAt, 0, \
3284 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3285 \
3286 diagnostic(intx, VerifyGCLevel, 0, \
3287 "Generation level at which to start +VerifyBefore/AfterGC") \
3288 \
3289 product(uintx, MaxTenuringThreshold, 15, \
3290 "Maximum value for tenuring threshold") \
3291 \
3292 product(uintx, InitialTenuringThreshold, 7, \
3293 "Initial value for tenuring threshold") \
3294 \
3295 product(uintx, TargetSurvivorRatio, 50, \
3296 "Desired percentage of survivor space used after scavenge") \
3297 \
3298 product(uintx, MarkSweepDeadRatio, 5, \
3299 "Percentage (0-100) of the old gen allowed as dead wood. " \
3300 "Serial mark sweep treats this as both the minimum and maximum " \
3301 "value. " \
3302 "CMS uses this value only if it falls back to mark sweep. " \
3303 "Par compact uses a variable scale based on the density of the " \
3304 "generation and treats this as the maximum value when the heap " \
3305 "is either completely full or completely empty. Par compact " \
3306 "also has a smaller default value; see arguments.cpp.") \
3307 \
3308 product(uintx, MarkSweepAlwaysCompactCount, 4, \
3309 "How often should we fully compact the heap (ignoring the dead " \
3310 "space parameters)") \
3311 \
3312 product(intx, PrintCMSStatistics, 0, \
3313 "Statistics for CMS") \
3314 \
3315 product(bool, PrintCMSInitiationStatistics, false, \
3316 "Statistics for initiating a CMS collection") \
3317 \
3318 product(intx, PrintFLSStatistics, 0, \
3319 "Statistics for CMS' FreeListSpace") \
3320 \
3321 product(intx, PrintFLSCensus, 0, \
3322 "Census for CMS' FreeListSpace") \
3323 \
3324 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3325 "Delay between expansion and allocation (in milliseconds)") \
3326 \
3327 develop(uintx, GCWorkerDelayMillis, 0, \
3328 "Delay in scheduling GC workers (in milliseconds)") \
3329 \
3330 product(intx, DeferThrSuspendLoopCount, 4000, \
3331 "(Unstable) Number of times to iterate in safepoint loop " \
3332 "before blocking VM threads ") \
3333 \
3334 product(intx, DeferPollingPageLoopCount, -1, \
3335 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3336 "before changing safepoint polling page to RO ") \
3337 \
3338 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3339 \
3340 product(bool, PSChunkLargeArrays, true, \
3341 "Process large arrays in chunks") \
3342 \
3343 product(uintx, GCDrainStackTargetSize, 64, \
3344 "Number of entries we will try to leave on the stack " \
3345 "during parallel gc") \
3346 \
3347 /* stack parameters */ \
3348 product_pd(intx, StackYellowPages, \
3349 "Number of yellow zone (recoverable overflows) pages") \
3350 \
3351 product_pd(intx, StackRedPages, \
3352 "Number of red zone (unrecoverable overflows) pages") \
3353 \
3354 product_pd(intx, StackShadowPages, \
3355 "Number of shadow zone (for overflow checking) pages " \
3356 "this should exceed the depth of the VM and native call stack") \
3357 \
3358 product_pd(intx, ThreadStackSize, \
3359 "Thread Stack Size (in Kbytes)") \
3360 \
3361 product_pd(intx, VMThreadStackSize, \
3362 "Non-Java Thread Stack Size (in Kbytes)") \
3363 \
3364 product_pd(intx, CompilerThreadStackSize, \
3365 "Compiler Thread Stack Size (in Kbytes)") \
3366 \
3367 develop_pd(uintx, JVMInvokeMethodSlack, \
3368 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3369 \
3370 product(uintx, ThreadSafetyMargin, 50*M, \
3371 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
3372 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
3373 "disable this feature") \
3374 \
3375 /* code cache parameters */ \
3376 /* ppc64 has large code-entry alignment. */ \
3377 develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64), \
3378 "Code cache segment size (in bytes) - smallest unit of " \
3379 "allocation") \
3380 \
3381 develop_pd(intx, CodeEntryAlignment, \
3382 "Code entry alignment for generated code (in bytes)") \
3383 \
3384 product_pd(intx, OptoLoopAlignment, \
3385 "Align inner loops to zero relative to this modulus") \
3386 \
3387 product_pd(uintx, InitialCodeCacheSize, \
3388 "Initial code cache size (in bytes)") \
3389 \
3390 develop_pd(uintx, CodeCacheMinimumUseSpace, \
3391 "Minimum code cache size (in bytes) required to start VM.") \
3392 \
3393 product_pd(uintx, ReservedCodeCacheSize, \
3394 "Reserved code cache size (in bytes) - maximum code cache size") \
3395 \
3396 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
3397 "When less than X space left, we stop compiling") \
3398 \
3399 product_pd(uintx, CodeCacheExpansionSize, \
3400 "Code cache expansion size (in bytes)") \
3401 \
3402 develop_pd(uintx, CodeCacheMinBlockLength, \
3403 "Minimum number of segments in a code cache block") \
3404 \
3405 notproduct(bool, ExitOnFullCodeCache, false, \
3406 "Exit the VM if we fill the code cache") \
3407 \
3408 product(bool, UseCodeCacheFlushing, true, \
3409 "Remove cold/old nmethods from the code cache") \
3410 \
3411 /* interpreter debugging */ \
3412 develop(intx, BinarySwitchThreshold, 5, \
3413 "Minimal number of lookupswitch entries for rewriting to binary " \
3414 "switch") \
3415 \
3416 develop(intx, StopInterpreterAt, 0, \
3417 "Stop interpreter execution at specified bytecode number") \
3418 \
3419 develop(intx, TraceBytecodesAt, 0, \
3420 "Trace bytecodes starting with specified bytecode number") \
3421 \
3422 /* compiler interface */ \
3423 develop(intx, CIStart, 0, \
3424 "The id of the first compilation to permit") \
3425 \
3426 develop(intx, CIStop, max_jint, \
3427 "The id of the last compilation to permit") \
3428 \
3429 develop(intx, CIStartOSR, 0, \
3430 "The id of the first osr compilation to permit " \
3431 "(CICountOSR must be on)") \
3432 \
3433 develop(intx, CIStopOSR, max_jint, \
3434 "The id of the last osr compilation to permit " \
3435 "(CICountOSR must be on)") \
3436 \
3437 develop(intx, CIBreakAtOSR, -1, \
3438 "The id of osr compilation to break at") \
3439 \
3440 develop(intx, CIBreakAt, -1, \
3441 "The id of compilation to break at") \
3442 \
3443 product(ccstrlist, CompileOnly, "", \
3444 "List of methods (pkg/class.name) to restrict compilation to") \
3445 \
3446 product(ccstr, CompileCommandFile, NULL, \
3447 "Read compiler commands from this file [.hotspot_compiler]") \
3448 \
3449 product(ccstrlist, CompileCommand, "", \
3450 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3451 \
3452 develop(bool, ReplayCompiles, false, \
3453 "Enable replay of compilations from ReplayDataFile") \
3454 \
3455 product(ccstr, ReplayDataFile, NULL, \
3456 "File containing compilation replay information" \
3457 "[default: ./replay_pid%p.log] (%p replaced with pid)") \
3458 \
3459 product(ccstr, InlineDataFile, NULL, \
3460 "File containing inlining replay information" \
3461 "[default: ./inline_pid%p.log] (%p replaced with pid)") \
3462 \
3463 develop(intx, ReplaySuppressInitializers, 2, \
3464 "Control handling of class initialization during replay: " \
3465 "0 - don't do anything special; " \
3466 "1 - treat all class initializers as empty; " \
3467 "2 - treat class initializers for application classes as empty; " \
3468 "3 - allow all class initializers to run during bootstrap but " \
3469 " pretend they are empty after starting replay") \
3470 \
3471 develop(bool, ReplayIgnoreInitErrors, false, \
3472 "Ignore exceptions thrown during initialization for replay") \
3473 \
3474 product(bool, DumpReplayDataOnError, true, \
3475 "Record replay data for crashing compiler threads") \
3476 \
3477 product(bool, CICompilerCountPerCPU, false, \
3478 "1 compiler thread for log(N CPUs)") \
3479 \
3480 develop(intx, CIFireOOMAt, -1, \
3481 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3482 "(non-negative value throws OOM after this many CI accesses " \
3483 "in each compile)") \
3484 notproduct(intx, CICrashAt, -1, \
3485 "id of compilation to trigger assert in compiler thread for " \
3486 "the purpose of testing, e.g. generation of replay data") \
3487 notproduct(bool, CIObjectFactoryVerify, false, \
3488 "enable potentially expensive verification in ciObjectFactory") \
3489 \
3490 diagnostic(bool, AbortVMOnCompilationFailure, false, \
3491 "Abort VM when method had failed to compile.") \
3492 \
3493 /* Priorities */ \
3494 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3495 \
3496 product(intx, ThreadPriorityPolicy, 0, \
3497 "0 : Normal. "\
3498 " VM chooses priorities that are appropriate for normal "\
3499 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3500 " to normal native priority. Java priorities below " \
3501 " NORM_PRIORITY map to lower native priority values. On "\
3502 " Windows applications are allowed to use higher native "\
3503 " priorities. However, with ThreadPriorityPolicy=0, VM will "\
3504 " not use the highest possible native priority, "\
3505 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\
3506 " system threads. On Linux thread priorities are ignored "\
3507 " because the OS does not support static priority in "\
3508 " SCHED_OTHER scheduling class which is the only choice for "\
3509 " non-root, non-realtime applications. "\
3510 "1 : Aggressive. "\
3511 " Java thread priorities map over to the entire range of "\
3512 " native thread priorities. Higher Java thread priorities map "\
3513 " to higher native thread priorities. This policy should be "\
3514 " used with care, as sometimes it can cause performance "\
3515 " degradation in the application and/or the entire system. On "\
3516 " Linux this policy requires root privilege.") \
3517 \
3518 product(bool, ThreadPriorityVerbose, false, \
3519 "Print priority changes") \
3520 \
3521 product(intx, DefaultThreadPriority, -1, \
3522 "The native priority at which threads run if not elsewhere " \
3523 "specified (-1 means no change)") \
3524 \
3525 product(intx, CompilerThreadPriority, -1, \
3526 "The native priority at which compiler threads should run " \
3527 "(-1 means no change)") \
3528 \
3529 product(intx, VMThreadPriority, -1, \
3530 "The native priority at which the VM thread should run " \
3531 "(-1 means no change)") \
3532 \
3533 product(bool, CompilerThreadHintNoPreempt, true, \
3534 "(Solaris only) Give compiler threads an extra quanta") \
3535 \
3536 product(bool, VMThreadHintNoPreempt, false, \
3537 "(Solaris only) Give VM thread an extra quanta") \
3538 \
3539 product(intx, JavaPriority1_To_OSPriority, -1, \
3540 "Map Java priorities to OS priorities") \
3541 \
3542 product(intx, JavaPriority2_To_OSPriority, -1, \
3543 "Map Java priorities to OS priorities") \
3544 \
3545 product(intx, JavaPriority3_To_OSPriority, -1, \
3546 "Map Java priorities to OS priorities") \
3547 \
3548 product(intx, JavaPriority4_To_OSPriority, -1, \
3549 "Map Java priorities to OS priorities") \
3550 \
3551 product(intx, JavaPriority5_To_OSPriority, -1, \
3552 "Map Java priorities to OS priorities") \
3553 \
3554 product(intx, JavaPriority6_To_OSPriority, -1, \
3555 "Map Java priorities to OS priorities") \
3556 \
3557 product(intx, JavaPriority7_To_OSPriority, -1, \
3558 "Map Java priorities to OS priorities") \
3559 \
3560 product(intx, JavaPriority8_To_OSPriority, -1, \
3561 "Map Java priorities to OS priorities") \
3562 \
3563 product(intx, JavaPriority9_To_OSPriority, -1, \
3564 "Map Java priorities to OS priorities") \
3565 \
3566 product(intx, JavaPriority10_To_OSPriority,-1, \
3567 "Map Java priorities to OS priorities") \
3568 \
3569 experimental(bool, UseCriticalJavaThreadPriority, false, \
3570 "Java thread priority 10 maps to critical scheduling priority") \
3571 \
3572 experimental(bool, UseCriticalCompilerThreadPriority, false, \
3573 "Compiler thread(s) run at critical scheduling priority") \
3574 \
3575 experimental(bool, UseCriticalCMSThreadPriority, false, \
3576 "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3577 \
3578 /* compiler debugging */ \
3579 notproduct(intx, CompileTheWorldStartAt, 1, \
3580 "First class to consider when using +CompileTheWorld") \
3581 \
3582 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3583 "Last class to consider when using +CompileTheWorld") \
3584 \
3585 develop(intx, NewCodeParameter, 0, \
3586 "Testing Only: Create a dedicated integer parameter before " \
3587 "putback") \
3588 \
3589 /* new oopmap storage allocation */ \
3590 develop(intx, MinOopMapAllocation, 8, \
3591 "Minimum number of OopMap entries in an OopMapSet") \
3592 \
3593 /* Background Compilation */ \
3594 develop(intx, LongCompileThreshold, 50, \
3595 "Used with +TraceLongCompiles") \
3596 \
3597 product(intx, StarvationMonitorInterval, 200, \
3598 "Pause between each check (in milliseconds)") \
3599 \
3600 /* recompilation */ \
3601 product_pd(intx, CompileThreshold, \
3602 "number of interpreted method invocations before (re-)compiling") \
3603 \
3604 product_pd(intx, BackEdgeThreshold, \
3605 "Interpreter Back edge threshold at which an OSR compilation is " \
3606 "invoked") \
3607 \
3608 product(intx, Tier0InvokeNotifyFreqLog, 7, \
3609 "Interpreter (tier 0) invocation notification frequency") \
3610 \
3611 product(intx, Tier2InvokeNotifyFreqLog, 11, \
3612 "C1 without MDO (tier 2) invocation notification frequency") \
3613 \
3614 product(intx, Tier3InvokeNotifyFreqLog, 10, \
3615 "C1 with MDO profiling (tier 3) invocation notification " \
3616 "frequency") \
3617 \
3618 product(intx, Tier23InlineeNotifyFreqLog, 20, \
3619 "Inlinee invocation (tiers 2 and 3) notification frequency") \
3620 \
3621 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
3622 "Interpreter (tier 0) invocation notification frequency") \
3623 \
3624 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
3625 "C1 without MDO (tier 2) invocation notification frequency") \
3626 \
3627 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
3628 "C1 with MDO profiling (tier 3) invocation notification " \
3629 "frequency") \
3630 \
3631 product(intx, Tier2CompileThreshold, 0, \
3632 "threshold at which tier 2 compilation is invoked") \
3633 \
3634 product(intx, Tier2BackEdgeThreshold, 0, \
3635 "Back edge threshold at which tier 2 compilation is invoked") \
3636 \
3637 product(intx, Tier3InvocationThreshold, 200, \
3638 "Compile if number of method invocations crosses this " \
3639 "threshold") \
3640 \
3641 product(intx, Tier3MinInvocationThreshold, 100, \
3642 "Minimum invocation to compile at tier 3") \
3643 \
3644 product(intx, Tier3CompileThreshold, 2000, \
3645 "Threshold at which tier 3 compilation is invoked (invocation " \
3646 "minimum must be satisfied") \
3647 \
3648 product(intx, Tier3BackEdgeThreshold, 60000, \
3649 "Back edge threshold at which tier 3 OSR compilation is invoked") \
3650 \
3651 product(intx, Tier4InvocationThreshold, 5000, \
3652 "Compile if number of method invocations crosses this " \
3653 "threshold") \
3654 \
3655 product(intx, Tier4MinInvocationThreshold, 600, \
3656 "Minimum invocation to compile at tier 4") \
3657 \
3658 product(intx, Tier4CompileThreshold, 15000, \
3659 "Threshold at which tier 4 compilation is invoked (invocation " \
3660 "minimum must be satisfied") \
3661 \
3662 product(intx, Tier4BackEdgeThreshold, 40000, \
3663 "Back edge threshold at which tier 4 OSR compilation is invoked") \
3664 \
3665 product(intx, Tier3DelayOn, 5, \
3666 "If C2 queue size grows over this amount per compiler thread " \
3667 "stop compiling at tier 3 and start compiling at tier 2") \
3668 \
3669 product(intx, Tier3DelayOff, 2, \
3670 "If C2 queue size is less than this amount per compiler thread " \
3671 "allow methods compiled at tier 2 transition to tier 3") \
3672 \
3673 product(intx, Tier3LoadFeedback, 5, \
3674 "Tier 3 thresholds will increase twofold when C1 queue size " \
3675 "reaches this amount per compiler thread") \
3676 \
3677 product(intx, Tier4LoadFeedback, 3, \
3678 "Tier 4 thresholds will increase twofold when C2 queue size " \
3679 "reaches this amount per compiler thread") \
3680 \
3681 product(intx, TieredCompileTaskTimeout, 50, \
3682 "Kill compile task if method was not used within " \
3683 "given timeout in milliseconds") \
3684 \
3685 product(intx, TieredStopAtLevel, 4, \
3686 "Stop at given compilation level") \
3687 \
3688 product(intx, Tier0ProfilingStartPercentage, 200, \
3689 "Start profiling in interpreter if the counters exceed tier 3 " \
3690 "thresholds by the specified percentage") \
3691 \
3692 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \
3693 "Increase the compile threshold for C1 compilation if the code " \
3694 "cache is filled by the specified percentage") \
3695 \
3696 product(intx, TieredRateUpdateMinTime, 1, \
3697 "Minimum rate sampling interval (in milliseconds)") \
3698 \
3699 product(intx, TieredRateUpdateMaxTime, 25, \
3700 "Maximum rate sampling interval (in milliseconds)") \
3701 \
3702 product_pd(bool, TieredCompilation, \
3703 "Enable tiered compilation") \
3704 \
3705 product(bool, PrintTieredEvents, false, \
3706 "Print tiered events notifications") \
3707 \
3708 product_pd(intx, OnStackReplacePercentage, \
3709 "NON_TIERED number of method invocations/branches (expressed as " \
3710 "% of CompileThreshold) before (re-)compiling OSR code") \
3711 \
3712 product(intx, InterpreterProfilePercentage, 33, \
3713 "NON_TIERED number of method invocations/branches (expressed as " \
3714 "% of CompileThreshold) before profiling in the interpreter") \
3715 \
3716 develop(intx, MaxRecompilationSearchLength, 10, \
3717 "The maximum number of frames to inspect when searching for " \
3718 "recompilee") \
3719 \
3720 develop(intx, MaxInterpretedSearchLength, 3, \
3721 "The maximum number of interpreted frames to skip when searching "\
3722 "for recompilee") \
3723 \
3724 develop(intx, DesiredMethodLimit, 8000, \
3725 "The desired maximum method size (in bytecodes) after inlining") \
3726 \
3727 develop(intx, HugeMethodLimit, 8000, \
3728 "Don't compile methods larger than this if " \
3729 "+DontCompileHugeMethods") \
3730 \
3731 /* New JDK 1.4 reflection implementation */ \
3732 \
3733 develop(bool, UseNewReflection, true, \
3734 "Temporary flag for transition to reflection based on dynamic " \
3735 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3736 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3737 "changes were needed") \
3738 \
3739 develop(bool, VerifyReflectionBytecodes, false, \
3740 "Force verification of 1.4 reflection bytecodes. Does not work " \
3741 "in situations like that described in 4486457 or for " \
3742 "constructors generated for serialization, so can not be enabled "\
3743 "in product.") \
3744 \
3745 product(bool, ReflectionWrapResolutionErrors, true, \
3746 "Temporary flag for transition to AbstractMethodError wrapped " \
3747 "in InvocationTargetException. See 6531596") \
3748 \
3749 develop(intx, FastSuperclassLimit, 8, \
3750 "Depth of hardwired instanceof accelerator array") \
3751 \
3752 /* Properties for Java libraries */ \
3753 \
3754 product(uintx, MaxDirectMemorySize, 0, \
3755 "Maximum total size of NIO direct-buffer allocations") \
3756 \
3757 /* temporary developer defined flags */ \
3758 \
3759 diagnostic(bool, UseNewCode, false, \
3760 "Testing Only: Use the new version while testing") \
3761 \
3762 diagnostic(bool, UseNewCode2, false, \
3763 "Testing Only: Use the new version while testing") \
3764 \
3765 diagnostic(bool, UseNewCode3, false, \
3766 "Testing Only: Use the new version while testing") \
3767 \
3768 /* flags for performance data collection */ \
3769 \
3770 product(bool, UsePerfData, falseInEmbedded, \
3771 "Flag to disable jvmstat instrumentation for performance testing "\
3772 "and problem isolation purposes") \
3773 \
3774 product(bool, PerfDataSaveToFile, false, \
3775 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3776 \
3777 product(ccstr, PerfDataSaveFile, NULL, \
3778 "Save PerfData memory to the specified absolute pathname. " \
3779 "The string %p in the file name (if present) " \
3780 "will be replaced by pid") \
3781 \
3782 product(intx, PerfDataSamplingInterval, 50, \
3783 "Data sampling interval (in milliseconds)") \
3784 \
3785 develop(bool, PerfTraceDataCreation, false, \
3786 "Trace creation of Performance Data Entries") \
3787 \
3788 develop(bool, PerfTraceMemOps, false, \
3789 "Trace PerfMemory create/attach/detach calls") \
3790 \
3791 product(bool, PerfDisableSharedMem, false, \
3792 "Store performance data in standard memory") \
3793 \
3794 product(intx, PerfDataMemorySize, 32*K, \
3795 "Size of performance data memory region. Will be rounded " \
3796 "up to a multiple of the native os page size.") \
3797 \
3798 product(intx, PerfMaxStringConstLength, 1024, \
3799 "Maximum PerfStringConstant string length before truncation") \
3800 \
3801 product(bool, PerfAllowAtExitRegistration, false, \
3802 "Allow registration of atexit() methods") \
3803 \
3804 product(bool, PerfBypassFileSystemCheck, false, \
3805 "Bypass Win32 file system criteria checks (Windows Only)") \
3806 \
3807 product(intx, UnguardOnExecutionViolation, 0, \
3808 "Unguard page and retry on no-execute fault (Win32 only) " \
3809 "0=off, 1=conservative, 2=aggressive") \
3810 \
3811 /* Serviceability Support */ \
3812 \
3813 product(bool, ManagementServer, false, \
3814 "Create JMX Management Server") \
3815 \
3816 product(bool, DisableAttachMechanism, false, \
3817 "Disable mechanism that allows tools to attach to this VM") \
3818 \
3819 product(bool, StartAttachListener, false, \
3820 "Always start Attach Listener at VM startup") \
3821 \
3822 manageable(bool, PrintConcurrentLocks, false, \
3823 "Print java.util.concurrent locks in thread dump") \
3824 \
3825 product(bool, TransmitErrorReport, false, \
3826 "Enable error report transmission on erroneous termination") \
3827 \
3828 product(ccstr, ErrorReportServer, NULL, \
3829 "Override built-in error report server address") \
3830 \
3831 /* Shared spaces */ \
3832 \
3833 product(bool, UseSharedSpaces, true, \
3834 "Use shared spaces for metadata") \
3835 \
3836 product(bool, VerifySharedSpaces, false, \
3837 "Verify shared spaces (false for default archive, true for " \
3838 "archive specified by -XX:SharedArchiveFile)") \
3839 \
3840 product(bool, RequireSharedSpaces, false, \
3841 "Require shared spaces for metadata") \
3842 \
3843 product(bool, DumpSharedSpaces, false, \
3844 "Special mode: JVM reads a class list, loads classes, builds " \
3845 "shared spaces, and dumps the shared spaces to a file to be " \
3846 "used in future JVM runs") \
3847 \
3848 product(bool, PrintSharedSpaces, false, \
3849 "Print usage of shared spaces") \
3850 \
3851 product(bool, PrintSharedArchiveAndExit, false, \
3852 "Print shared archive file contents") \
3853 \
3854 product(bool, PrintSharedDictionary, false, \
3855 "If PrintSharedArchiveAndExit is true, also print the shared " \
3856 "dictionary") \
3857 \
3858 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3859 "Size of read-write space for metadata (in bytes)") \
3860 \
3861 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3862 "Size of read-only space for metadata (in bytes)") \
3863 \
3864 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \
3865 "Size of the shared miscellaneous data area (in bytes)") \
3866 \
3867 product(uintx, SharedMiscCodeSize, 120*K, \
3868 "Size of the shared miscellaneous code area (in bytes)") \
3869 \
3870 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \
3871 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \
3872 "Address to allocate shared memory region for class data") \
3873 \
3874 diagnostic(bool, EnableInvokeDynamic, true, \
3875 "support JSR 292 (method handles, invokedynamic, " \
3876 "anonymous classes") \
3877 \
3878 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \
3879 "Do not quit -Xshare:dump even if we encounter unverifiable " \
3880 "classes. Just exclude them from the shared dictionary.") \
3881 \
3882 diagnostic(bool, PrintMethodHandleStubs, false, \
3883 "Print generated stub code for method handles") \
3884 \
3885 develop(bool, TraceMethodHandles, false, \
3886 "trace internal method handle operations") \
3887 \
3888 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
3889 "perform extra checks when constructing method handles") \
3890 \
3891 diagnostic(bool, ShowHiddenFrames, false, \
3892 "show method handle implementation frames (usually hidden)") \
3893 \
3894 experimental(bool, TrustFinalNonStaticFields, false, \
3895 "trust final non-static declarations for constant folding") \
3896 \
3897 diagnostic(bool, FoldStableValues, true, \
3898 "Optimize loads from stable fields (marked w/ @Stable)") \
3899 \
3900 develop(bool, TraceInvokeDynamic, false, \
3901 "trace internal invoke dynamic operations") \
3902 \
3903 diagnostic(bool, PauseAtStartup, false, \
3904 "Causes the VM to pause at startup time and wait for the pause " \
3905 "file to be removed (default: ./vm.paused.<pid>)") \
3906 \
3907 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3908 "The file to create and for whose removal to await when pausing " \
3909 "at startup. (default: ./vm.paused.<pid>)") \
3910 \
3911 diagnostic(bool, PauseAtExit, false, \
3912 "Pause and wait for keypress on exit if a debugger is attached") \
3913 \
3914 product(bool, ExtendedDTraceProbes, false, \
3915 "Enable performance-impacting dtrace probes") \
3916 \
3917 product(bool, DTraceMethodProbes, false, \
3918 "Enable dtrace probes for method-entry and method-exit") \
3919 \
3920 product(bool, DTraceAllocProbes, false, \
3921 "Enable dtrace probes for object allocation") \
3922 \
3923 product(bool, DTraceMonitorProbes, false, \
3924 "Enable dtrace probes for monitor events") \
3925 \
3926 product(bool, RelaxAccessControlCheck, false, \
3927 "Relax the access control checks in the verifier") \
3928 \
3929 diagnostic(bool, PrintDTraceDOF, false, \
3930 "Print the DTrace DOF passed to the system for JSDT probes") \
3931 \
3932 product(uintx, StringTableSize, defaultStringTableSize, \
3933 "Number of buckets in the interned String table") \
3934 \
3935 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \
3936 "Number of buckets in the JVM internal Symbol table") \
3937 \
3938 product(bool, UseStringDeduplication, false, \
3939 "Use string deduplication") \
3940 \
3941 product(bool, PrintStringDeduplicationStatistics, false, \
3942 "Print string deduplication statistics") \
3943 \
3944 product(uintx, StringDeduplicationAgeThreshold, 3, \
3945 "A string must reach this age (or be promoted to an old region) " \
3946 "to be considered for deduplication") \
3947 \
3948 diagnostic(bool, StringDeduplicationResizeALot, false, \
3949 "Force table resize every time the table is scanned") \
3950 \
3951 diagnostic(bool, StringDeduplicationRehashALot, false, \
3952 "Force table rehash every time the table is scanned") \
3953 \
3954 develop(bool, TraceDefaultMethods, false, \
3955 "Trace the default method processing steps") \
3956 \
3957 develop(bool, VerifyGenericSignatures, false, \
3958 "Abort VM on erroneous or inconsistent generic signatures") \
3959 \
3960 product(bool, UseVMInterruptibleIO, false, \
3961 "(Unstable, Solaris-specific) Thread interrupt before or with " \
3962 "EINTR for I/O operations results in OS_INTRPT. The default " \
3963 "value of this flag is true for JDK 6 and earlier") \
3964 \
3965 diagnostic(bool, WhiteBoxAPI, false, \
3966 "Enable internal testing APIs") \
3967 \
3968 product(bool, PrintGCCause, true, \
3969 "Include GC cause in GC logging") \
3970 \
3971 experimental(intx, SurvivorAlignmentInBytes, 0, \
3972 "Default survivor space alignment in bytes") \
3973 \
3974 product(bool , AllowNonVirtualCalls, false, \
3975 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \
3976 \
3977 product(ccstr, DumpLoadedClassList, NULL, \
3978 "Dump the names all loaded classes, that could be stored into " \
3979 "the CDS archive, in the specified file") \
3980 \
3981 product(ccstr, SharedClassListFile, NULL, \
3982 "Override the default CDS class list") \
3983 \
3984 diagnostic(ccstr, SharedArchiveFile, NULL, \
3985 "Override the default location of the CDS archive file") \
3986 \
3987 product(ccstr, ExtraSharedClassListFile, NULL, \
3988 "Extra classlist for building the CDS archive file") \
3989 \
3990 experimental(uintx, ArrayAllocatorMallocLimit, \
3991 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \
3992 "Allocation less than this value will be allocated " \
3993 "using malloc. Larger allocations will use mmap.") \
3994 \
3995 product_pd(bool, PreserveFramePointer, \
3996 "Use the FP register for holding the frame pointer " \
3997 "and not as a general purpose register.") \
3998 \
3999 product(bool, EnableTracing, false, \
4000 "Enable event-based tracing" \
4001 "Deprecated: use FlightRecorder instead") \
4002 \
4003 product(bool, UseLockedTracing, false, \
4004 "Use locked-tracing when doing event-based tracing" \
4005 "Deprecated: use FlightRecorder instead") \
4006 \
4007 JFR_ONLY(product(bool, FlightRecorder, false, \
4008 "Enable Flight Recorder")) \
4009 \
4010 JFR_ONLY(product(ccstr, FlightRecorderOptions, NULL, \
4011 "Flight Recorder options")) \
4012 \
4013 JFR_ONLY(product(ccstr, StartFlightRecording, NULL, \
4014 "Start flight recording with options")) \
4015 \
4016 JFR_ONLY(product(bool, UnlockCommercialFeatures, false, \
4017 "This flag is ignored. Left for compatibility")) \
4018 \
4019 experimental(bool, UseFastUnorderedTimeStamps, false, \
4020 "Use platform unstable time where supported for timestamps only") \
4021 \
4022 JFR_ONLY(product(bool, LogJFR, false, \
4023 "Enable JFR logging (consider +Verbose)")) \
4024
4025 /*
4026 * Macros for factoring of globals
4027 */
4028
4029 // Interface macros
4030 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4031 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
4032 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
4033 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
4034 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
4035 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
4036 #ifdef PRODUCT
4037 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value;
4038 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name;
4039 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name;
4040 #else
4041 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
4042 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
4043 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4044 #endif
4045 // Special LP64 flags, product only needed for now.
4046 #ifdef _LP64
4047 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4048 #else
4049 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
4050 #endif // _LP64
4051
4052 // Implementation macros
4053 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
4054 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
4055 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
4056 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
4057 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
4058 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
4059 #ifdef PRODUCT
4060 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value;
4061 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name;
4062 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value;
4063 #else
4064 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
4065 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
4066 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
4067 #endif
4068 #ifdef _LP64
4069 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
4070 #else
4071 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
4072 #endif // _LP64
4073
4074 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)
4075
4076 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
4077
4078 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
4079
4080 // Extensions
4081
4082 #include "runtime/globals_ext.hpp"
4083
4084 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP