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 // string type aliases used only in this file
208 typedef const char* ccstr;
209 typedef const char* ccstrlist; // represents string arguments which accumulate
210
211 struct Flag {
212 enum Flags {
213 // value origin
214 DEFAULT = 0,
215 COMMAND_LINE = 1,
216 ENVIRON_VAR = 2,
217 CONFIG_FILE = 3,
218 MANAGEMENT = 4,
219 ERGONOMIC = 5,
220 ATTACH_ON_DEMAND = 6,
221 INTERNAL = 7,
222
223 LAST_VALUE_ORIGIN = INTERNAL,
224 VALUE_ORIGIN_BITS = 4,
225 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
226
227 // flag kind
228 KIND_PRODUCT = 1 << 4,
229 KIND_MANAGEABLE = 1 << 5,
230 KIND_DIAGNOSTIC = 1 << 6,
231 KIND_EXPERIMENTAL = 1 << 7,
232 KIND_NOT_PRODUCT = 1 << 8,
233 KIND_DEVELOP = 1 << 9,
234 KIND_PLATFORM_DEPENDENT = 1 << 10,
235 KIND_READ_WRITE = 1 << 11,
236 KIND_C1 = 1 << 12,
237 KIND_C2 = 1 << 13,
238 KIND_ARCH = 1 << 14,
239 KIND_SHARK = 1 << 15,
240 KIND_LP64_PRODUCT = 1 << 16,
241 KIND_COMMERCIAL = 1 << 17,
242
243 KIND_MASK = ~VALUE_ORIGIN_MASK
244 };
245
246 const char* _type;
247 const char* _name;
248 void* _addr;
249 NOT_PRODUCT(const char* _doc;)
250 Flags _flags;
251
252 // points to all Flags static array
253 static Flag* flags;
254
255 // number of flags
256 static size_t numFlags;
257
258 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false);
259 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
260
261 void check_writable();
262
263 bool is_bool() const;
264 bool get_bool() const;
265 void set_bool(bool value);
266
267 bool is_int() const;
268 int get_int() const;
269 void set_int(int value);
270
271 bool is_uint() const;
272 uint get_uint() const;
273 void set_uint(uint value);
274
275 bool is_intx() const;
276 intx get_intx() const;
277 void set_intx(intx value);
278
279 bool is_uintx() const;
280 uintx get_uintx() const;
281 void set_uintx(uintx value);
282
283 bool is_uint64_t() const;
284 uint64_t get_uint64_t() const;
285 void set_uint64_t(uint64_t value);
286
287 bool is_size_t() const;
288 size_t get_size_t() const;
289 void set_size_t(size_t value);
290
291 bool is_double() const;
292 double get_double() const;
293 void set_double(double value);
294
295 bool is_ccstr() const;
296 bool ccstr_accumulates() const;
297 ccstr get_ccstr() const;
298 void set_ccstr(ccstr value);
299
300 Flags get_origin();
301 void set_origin(Flags origin);
302
303 bool is_default();
304 bool is_ergonomic();
305 bool is_command_line();
306
307 bool is_product() const;
308 bool is_manageable() const;
309 bool is_diagnostic() const;
310 bool is_experimental() const;
311 bool is_notproduct() const;
312 bool is_develop() const;
313 bool is_read_write() const;
314 bool is_commercial() const;
315
316 bool is_constant_in_binary() const;
317
318 bool is_unlocker() const;
319 bool is_unlocked() const;
320 bool is_writeable() const;
321 bool is_external() const;
322
323 bool is_unlocker_ext() const;
324 bool is_unlocked_ext() const;
325 bool is_writeable_ext() const;
326 bool is_external_ext() const;
327
328 void unlock_diagnostic();
329
330 void get_locked_message(char*, int) const;
331 void get_locked_message_ext(char*, int) const;
332
333 void print_on(outputStream* st, bool withComments = false );
334 void print_kind(outputStream* st);
335 void print_as_flag(outputStream* st);
336 };
337
338 // debug flags control various aspects of the VM and are global accessible
339
340 // use FlagSetting to temporarily change some debug flag
341 // e.g. FlagSetting fs(DebugThisAndThat, true);
342 // restored to previous value upon leaving scope
343 class FlagSetting {
344 bool val;
345 bool* flag;
346 public:
347 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
348 ~FlagSetting() { *flag = val; }
349 };
350
351
352 class CounterSetting {
353 intx* counter;
354 public:
355 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
356 ~CounterSetting() { (*counter)--; }
357 };
358
359
360 class UIntFlagSetting {
361 uintx val;
362 uintx* flag;
363 public:
364 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
365 ~UIntFlagSetting() { *flag = val; }
366 };
367
368
369 class DoubleFlagSetting {
370 double val;
371 double* flag;
372 public:
373 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
374 ~DoubleFlagSetting() { *flag = val; }
375 };
376
377
378 class CommandLineFlags {
379 public:
380 static bool boolAt(const char* name, size_t len, bool* value);
381 static bool boolAt(const char* name, bool* value) { return boolAt(name, strlen(name), value); }
382 static bool boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin);
383 static bool boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); }
384
385 static bool intxAt(const char* name, size_t len, intx* value);
386 static bool intxAt(const char* name, intx* value) { return intxAt(name, strlen(name), value); }
387 static bool intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin);
388 static bool intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); }
389
390 static bool uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false);
391 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); }
392 static bool uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin);
393 static bool uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
394
395 static bool uint64_tAt(const char* name, size_t len, uint64_t* value);
396 static bool uint64_tAt(const char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
397 static bool uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin);
398 static bool uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
399
400 static bool doubleAt(const char* name, size_t len, double* value);
401 static bool doubleAt(const char* name, double* value) { return doubleAt(name, strlen(name), value); }
402 static bool doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin);
403 static bool doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
404
405 static bool ccstrAt(const char* name, size_t len, ccstr* value);
406 static bool ccstrAt(const char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
407 // Contract: Flag will make private copy of the incoming value.
408 // Outgoing value is always malloc-ed, and caller MUST call free.
409 static bool ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin);
410 static bool ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
411
412 // Returns false if name is not a command line flag.
413 static bool wasSetOnCmdline(const char* name, bool* value);
414 static void printSetFlags(outputStream* out);
415
416 static void printFlags(outputStream* out, bool withComments);
417
418 static void verify() PRODUCT_RETURN;
419 };
420
421 #if INCLUDE_TRACE
422 #define TRACE_ONLY(code) code
423 #else
424 #define TRACE_ONLY(code)
425 #endif
426
427 // use this for flags that are true by default in the debug version but
428 // false in the optimized version, and vice versa
429 #ifdef ASSERT
430 #define trueInDebug true
431 #define falseInDebug false
432 #else
433 #define trueInDebug false
434 #define falseInDebug true
435 #endif
436
437 // use this for flags that are true per default in the product build
438 // but false in development builds, and vice versa
439 #ifdef PRODUCT
440 #define trueInProduct true
441 #define falseInProduct false
442 #else
443 #define trueInProduct false
444 #define falseInProduct true
445 #endif
446
447 #ifdef JAVASE_EMBEDDED
448 #define falseInEmbedded false
449 #else
450 #define falseInEmbedded true
451 #endif
452
453 // develop flags are settable / visible only during development and are constant in the PRODUCT version
454 // product flags are always settable / visible
455 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
456
457 // A flag must be declared with one of the following types:
458 // bool, intx, uintx, ccstr.
459 // The type "ccstr" is an alias for "const char*" and is used
460 // only in this file, because the macrology requires single-token type names.
461
462 // Note: Diagnostic options not meant for VM tuning or for product modes.
463 // They are to be used for VM quality assurance or field diagnosis
464 // of VM bugs. They are hidden so that users will not be encouraged to
465 // try them as if they were VM ordinary execution options. However, they
466 // are available in the product version of the VM. Under instruction
467 // from support engineers, VM customers can turn them on to collect
468 // diagnostic information about VM problems. To use a VM diagnostic
469 // option, you must first specify +UnlockDiagnosticVMOptions.
470 // (This master switch also affects the behavior of -Xprintflags.)
471 //
472 // experimental flags are in support of features that are not
473 // part of the officially supported product, but are available
474 // for experimenting with. They could, for example, be performance
475 // features that may not have undergone full or rigorous QA, but which may
476 // help performance in some cases and released for experimentation
477 // by the community of users and developers. This flag also allows one to
478 // be able to build a fully supported product that nonetheless also
479 // ships with some unsupported, lightly tested, experimental features.
480 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
481 // UnlockExperimentalVMOptions flag, which allows the control and
482 // modification of the experimental flags.
483 //
484 // Nota bene: neither diagnostic nor experimental options should be used casually,
485 // and they are not supported on production loads, except under explicit
486 // direction from support engineers.
487 //
488 // manageable flags are writeable external product flags.
489 // They are dynamically writeable through the JDK management interface
490 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
491 // These flags are external exported interface (see CCC). The list of
492 // manageable flags can be queried programmatically through the management
493 // interface.
494 //
495 // A flag can be made as "manageable" only if
496 // - the flag is defined in a CCC as an external exported interface.
497 // - the VM implementation supports dynamic setting of the flag.
498 // This implies that the VM must *always* query the flag variable
499 // and not reuse state related to the flag state at any given time.
500 // - you want the flag to be queried programmatically by the customers.
501 //
502 // product_rw flags are writeable internal product flags.
503 // They are like "manageable" flags but for internal/private use.
504 // The list of product_rw flags are internal/private flags which
505 // may be changed/removed in a future release. It can be set
506 // through the management interface to get/set value
507 // when the name of flag is supplied.
508 //
509 // A flag can be made as "product_rw" only if
510 // - the VM implementation supports dynamic setting of the flag.
511 // This implies that the VM must *always* query the flag variable
512 // and not reuse state related to the flag state at any given time.
513 //
514 // Note that when there is a need to support develop flags to be writeable,
515 // it can be done in the same way as product_rw.
516
517 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
518 \
519 lp64_product(bool, UseCompressedOops, false, \
520 "Use 32-bit object references in 64-bit VM. " \
521 "lp64_product means flag is always constant in 32 bit VM") \
522 \
523 lp64_product(bool, UseCompressedClassPointers, false, \
524 "Use 32-bit class pointers in 64-bit VM. " \
525 "lp64_product means flag is always constant in 32 bit VM") \
526 \
527 notproduct(bool, CheckCompressedOops, true, \
528 "Generate checks in encoding/decoding code in debug VM") \
529 \
530 product_pd(uintx, HeapBaseMinAddress, \
531 "OS specific low limit for heap base address") \
532 \
533 diagnostic(bool, PrintCompressedOopsMode, false, \
534 "Print compressed oops base address and encoding mode") \
535 \
536 lp64_product(intx, ObjectAlignmentInBytes, 8, \
537 "Default object alignment in bytes, 8 is minimum") \
538 \
539 product(bool, AssumeMP, false, \
540 "Instruct the VM to assume multiple processors are available") \
541 \
542 /* UseMembar is theoretically a temp flag used for memory barrier \
543 * removal testing. It was supposed to be removed before FCS but has \
544 * been re-added (see 6401008) */ \
545 product_pd(bool, UseMembar, \
546 "(Unstable) Issues membars on thread state transitions") \
547 \
548 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
549 "Clean the chunk pool asynchronously") \
550 \
551 /* Temporary: See 6948537 */ \
552 experimental(bool, UseMemSetInBOT, true, \
553 "(Unstable) uses memset in BOT updates in GC code") \
554 \
555 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
556 "Enable normal processing of flags relating to field diagnostics")\
557 \
558 experimental(bool, UnlockExperimentalVMOptions, false, \
559 "Enable normal processing of flags relating to experimental " \
560 "features") \
561 \
562 product(bool, JavaMonitorsInStackTrace, true, \
563 "Print information about Java monitor locks when the stacks are" \
564 "dumped") \
565 \
566 product_pd(bool, UseLargePages, \
567 "Use large page memory") \
568 \
569 product_pd(bool, UseLargePagesIndividualAllocation, \
570 "Allocate large pages individually for better affinity") \
571 \
572 develop(bool, LargePagesIndividualAllocationInjectError, false, \
573 "Fail large pages individual allocation") \
574 \
575 product(bool, UseLargePagesInMetaspace, false, \
576 "Use large page memory in metaspace. " \
577 "Only used if UseLargePages is enabled.") \
578 \
579 develop(bool, TracePageSizes, false, \
580 "Trace page size selection and usage") \
581 \
582 product(bool, UseNUMA, false, \
583 "Use NUMA if available") \
584 \
585 product(bool, UseNUMAInterleaving, false, \
586 "Interleave memory across NUMA nodes if available") \
587 \
588 product(uintx, NUMAInterleaveGranularity, 2*M, \
589 "Granularity to use for NUMA interleaving on Windows OS") \
590 \
591 product(bool, ForceNUMA, false, \
592 "Force NUMA optimizations on single-node/UMA systems") \
593 \
594 product(uintx, NUMAChunkResizeWeight, 20, \
595 "Percentage (0-100) used to weigh the current sample when " \
596 "computing exponentially decaying average for " \
597 "AdaptiveNUMAChunkSizing") \
598 \
599 product(uintx, NUMASpaceResizeRate, 1*G, \
600 "Do not reallocate more than this amount per collection") \
601 \
602 product(bool, UseAdaptiveNUMAChunkSizing, true, \
603 "Enable adaptive chunk sizing for NUMA") \
604 \
605 product(bool, NUMAStats, false, \
606 "Print NUMA stats in detailed heap information") \
607 \
608 product(uintx, NUMAPageScanRate, 256, \
609 "Maximum number of pages to include in the page scan procedure") \
610 \
611 product_pd(bool, NeedsDeoptSuspend, \
612 "True for register window machines (sparc/ia64)") \
613 \
614 product(intx, UseSSE, 99, \
615 "Highest supported SSE instructions set on x86/x64") \
616 \
617 product(bool, UseAES, false, \
618 "Control whether AES instructions can be used on x86/x64") \
619 \
620 product(bool, UseSHA, false, \
621 "Control whether SHA instructions can be used on SPARC") \
622 \
623 product(uintx, LargePageSizeInBytes, 0, \
624 "Large page size (0 to let VM choose the page size)") \
625 \
626 product(uintx, LargePageHeapSizeThreshold, 128*M, \
627 "Use large pages if maximum heap is at least this big") \
628 \
629 product(bool, ForceTimeHighResolution, false, \
630 "Using high time resolution (for Win32 only)") \
631 \
632 develop(bool, TraceItables, false, \
633 "Trace initialization and use of itables") \
634 \
635 develop(bool, TracePcPatching, false, \
636 "Trace usage of frame::patch_pc") \
637 \
638 develop(bool, TraceJumps, false, \
639 "Trace assembly jumps in thread ring buffer") \
640 \
641 develop(bool, TraceRelocator, false, \
642 "Trace the bytecode relocator") \
643 \
644 develop(bool, TraceLongCompiles, false, \
645 "Print out every time compilation is longer than " \
646 "a given threshold") \
647 \
648 develop(bool, SafepointALot, false, \
649 "Generate a lot of safepoints. This works with " \
650 "GuaranteedSafepointInterval") \
651 \
652 product_pd(bool, BackgroundCompilation, \
653 "A thread requesting compilation is not blocked during " \
654 "compilation") \
655 \
656 product(bool, PrintVMQWaitTime, false, \
657 "Print out the waiting time in VM operation queue") \
658 \
659 develop(bool, NoYieldsInMicrolock, false, \
660 "Disable yields in microlock") \
661 \
662 develop(bool, TraceOopMapGeneration, false, \
663 "Show OopMapGeneration") \
664 \
665 product(bool, MethodFlushing, true, \
666 "Reclamation of zombie and not-entrant methods") \
667 \
668 develop(bool, VerifyStack, false, \
669 "Verify stack of each thread when it is entering a runtime call") \
670 \
671 diagnostic(bool, ForceUnreachable, false, \
672 "Make all non code cache addresses to be unreachable by " \
673 "forcing use of 64bit literal fixups") \
674 \
675 notproduct(bool, StressDerivedPointers, false, \
676 "Force scavenge when a derived pointer is detected on stack " \
677 "after rtm call") \
678 \
679 develop(bool, TraceDerivedPointers, false, \
680 "Trace traversal of derived pointers on stack") \
681 \
682 notproduct(bool, TraceCodeBlobStacks, false, \
683 "Trace stack-walk of codeblobs") \
684 \
685 product(bool, PrintJNIResolving, false, \
686 "Used to implement -v:jni") \
687 \
688 notproduct(bool, PrintRewrites, false, \
689 "Print methods that are being rewritten") \
690 \
691 product(bool, UseInlineCaches, true, \
692 "Use Inline Caches for virtual calls ") \
693 \
694 develop(bool, InlineArrayCopy, true, \
695 "Inline arraycopy native that is known to be part of " \
696 "base library DLL") \
697 \
698 develop(bool, InlineObjectHash, true, \
699 "Inline Object::hashCode() native that is known to be part " \
700 "of base library DLL") \
701 \
702 develop(bool, InlineNatives, true, \
703 "Inline natives that are known to be part of base library DLL") \
704 \
705 develop(bool, InlineMathNatives, true, \
706 "Inline SinD, CosD, etc.") \
707 \
708 develop(bool, InlineClassNatives, true, \
709 "Inline Class.isInstance, etc") \
710 \
711 develop(bool, InlineThreadNatives, true, \
712 "Inline Thread.currentThread, etc") \
713 \
714 develop(bool, InlineUnsafeOps, true, \
715 "Inline memory ops (native methods) from sun.misc.Unsafe") \
716 \
717 product(bool, CriticalJNINatives, true, \
718 "Check for critical JNI entry points") \
719 \
720 notproduct(bool, StressCriticalJNINatives, false, \
721 "Exercise register saving code in critical natives") \
722 \
723 product(bool, UseSSE42Intrinsics, false, \
724 "SSE4.2 versions of intrinsics") \
725 \
726 product(bool, UseAESIntrinsics, false, \
727 "Use intrinsics for AES versions of crypto") \
728 \
729 product(bool, UseSHA1Intrinsics, false, \
730 "Use intrinsics for SHA-1 crypto hash function") \
731 \
732 product(bool, UseSHA256Intrinsics, false, \
733 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions") \
734 \
735 product(bool, UseSHA512Intrinsics, false, \
736 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions") \
737 \
738 product(bool, UseCRC32Intrinsics, false, \
739 "use intrinsics for java.util.zip.CRC32") \
740 \
741 develop(bool, TraceCallFixup, false, \
742 "Trace all call fixups") \
743 \
744 develop(bool, DeoptimizeALot, false, \
745 "Deoptimize at every exit from the runtime system") \
746 \
747 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
748 "A comma separated list of bcis to deoptimize at") \
749 \
750 product(bool, DeoptimizeRandom, false, \
751 "Deoptimize random frames on random exit from the runtime system")\
752 \
753 notproduct(bool, ZombieALot, false, \
754 "Create zombies (non-entrant) at exit from the runtime system") \
755 \
756 product(bool, UnlinkSymbolsALot, false, \
757 "Unlink unreferenced symbols from the symbol table at safepoints")\
758 \
759 notproduct(bool, WalkStackALot, false, \
760 "Trace stack (no print) at every exit from the runtime system") \
761 \
762 product(bool, Debugging, false, \
763 "Set when executing debug methods in debug.cpp " \
764 "(to prevent triggering assertions)") \
765 \
766 notproduct(bool, StrictSafepointChecks, trueInDebug, \
767 "Enable strict checks that safepoints cannot happen for threads " \
768 "that use No_Safepoint_Verifier") \
769 \
770 notproduct(bool, VerifyLastFrame, false, \
771 "Verify oops on last frame on entry to VM") \
772 \
773 develop(bool, TraceHandleAllocation, false, \
774 "Print out warnings when suspiciously many handles are allocated")\
775 \
776 product(bool, UseCompilerSafepoints, true, \
777 "Stop at safepoints in compiled code") \
778 \
779 product(bool, FailOverToOldVerifier, true, \
780 "Fail over to old verifier when split verifier fails") \
781 \
782 develop(bool, ShowSafepointMsgs, false, \
783 "Show message about safepoint synchronization") \
784 \
785 product(bool, SafepointTimeout, false, \
786 "Time out and warn or fail after SafepointTimeoutDelay " \
787 "milliseconds if failed to reach safepoint") \
788 \
789 develop(bool, DieOnSafepointTimeout, false, \
790 "Die upon failure to reach safepoint (see SafepointTimeout)") \
791 \
792 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
793 /* typically, at most a few retries are needed */ \
794 product(intx, SuspendRetryCount, 50, \
795 "Maximum retry count for an external suspend request") \
796 \
797 product(intx, SuspendRetryDelay, 5, \
798 "Milliseconds to delay per retry (* current_retry_count)") \
799 \
800 product(bool, AssertOnSuspendWaitFailure, false, \
801 "Assert/Guarantee on external suspend wait failure") \
802 \
803 product(bool, TraceSuspendWaitFailures, false, \
804 "Trace external suspend wait failures") \
805 \
806 product(bool, MaxFDLimit, true, \
807 "Bump the number of file descriptors to maximum in Solaris") \
808 \
809 diagnostic(bool, LogEvents, true, \
810 "Enable the various ring buffer event logs") \
811 \
812 diagnostic(uintx, LogEventsBufferEntries, 10, \
813 "Number of ring buffer event logs") \
814 \
815 product(bool, BytecodeVerificationRemote, true, \
816 "Enable the Java bytecode verifier for remote classes") \
817 \
818 product(bool, BytecodeVerificationLocal, false, \
819 "Enable the Java bytecode verifier for local classes") \
820 \
821 develop(bool, ForceFloatExceptions, trueInDebug, \
822 "Force exceptions on FP stack under/overflow") \
823 \
824 develop(bool, VerifyStackAtCalls, false, \
825 "Verify that the stack pointer is unchanged after calls") \
826 \
827 develop(bool, TraceJavaAssertions, false, \
828 "Trace java language assertions") \
829 \
830 notproduct(bool, CheckAssertionStatusDirectives, false, \
831 "Temporary - see javaClasses.cpp") \
832 \
833 notproduct(bool, PrintMallocFree, false, \
834 "Trace calls to C heap malloc/free allocation") \
835 \
836 product(bool, PrintOopAddress, false, \
837 "Always print the location of the oop") \
838 \
839 notproduct(bool, VerifyCodeCacheOften, false, \
840 "Verify compiled-code cache often") \
841 \
842 develop(bool, ZapDeadCompiledLocals, false, \
843 "Zap dead locals in compiler frames") \
844 \
845 notproduct(bool, ZapDeadLocalsOld, false, \
846 "Zap dead locals (old version, zaps all frames when " \
847 "entering the VM") \
848 \
849 notproduct(bool, CheckOopishValues, false, \
850 "Warn if value contains oop (requires ZapDeadLocals)") \
851 \
852 develop(bool, UseMallocOnly, false, \
853 "Use only malloc/free for allocation (no resource area/arena)") \
854 \
855 develop(bool, PrintMalloc, false, \
856 "Print all malloc/free calls") \
857 \
858 develop(bool, PrintMallocStatistics, false, \
859 "Print malloc/free statistics") \
860 \
861 develop(bool, ZapResourceArea, trueInDebug, \
862 "Zap freed resource/arena space with 0xABABABAB") \
863 \
864 notproduct(bool, ZapVMHandleArea, trueInDebug, \
865 "Zap freed VM handle space with 0xBCBCBCBC") \
866 \
867 develop(bool, ZapJNIHandleArea, trueInDebug, \
868 "Zap freed JNI handle space with 0xFEFEFEFE") \
869 \
870 notproduct(bool, ZapStackSegments, trueInDebug, \
871 "Zap allocated/freed stack segments with 0xFADFADED") \
872 \
873 develop(bool, ZapUnusedHeapArea, trueInDebug, \
874 "Zap unused heap space with 0xBAADBABE") \
875 \
876 develop(bool, TraceZapUnusedHeapArea, false, \
877 "Trace zapping of unused heap space") \
878 \
879 develop(bool, CheckZapUnusedHeapArea, false, \
880 "Check zapping of unused heap space") \
881 \
882 develop(bool, ZapFillerObjects, trueInDebug, \
883 "Zap filler objects with 0xDEAFBABE") \
884 \
885 develop(bool, PrintVMMessages, true, \
886 "Print VM messages on console") \
887 \
888 product(bool, PrintGCApplicationConcurrentTime, false, \
889 "Print the time the application has been running") \
890 \
891 product(bool, PrintGCApplicationStoppedTime, false, \
892 "Print the time the application has been stopped") \
893 \
894 diagnostic(bool, VerboseVerification, false, \
895 "Display detailed verification details") \
896 \
897 notproduct(uintx, ErrorHandlerTest, 0, \
898 "If > 0, provokes an error after VM initialization; the value " \
899 "determines which error to provoke. See test_error_handler() " \
900 "in debug.cpp.") \
901 \
902 develop(bool, Verbose, false, \
903 "Print additional debugging information from other modes") \
904 \
905 develop(bool, PrintMiscellaneous, false, \
906 "Print uncategorized debugging information (requires +Verbose)") \
907 \
908 develop(bool, WizardMode, false, \
909 "Print much more debugging information") \
910 \
911 product(bool, ShowMessageBoxOnError, false, \
912 "Keep process alive on VM fatal error") \
913 \
914 product(bool, CreateMinidumpOnCrash, false, \
915 "Create minidump on VM fatal error") \
916 \
917 product_pd(bool, UseOSErrorReporting, \
918 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
919 \
920 product(bool, SuppressFatalErrorMessage, false, \
921 "Report NO fatal error message (avoid deadlock)") \
922 \
923 product(ccstrlist, OnError, "", \
924 "Run user-defined commands on fatal error; see VMError.cpp " \
925 "for examples") \
926 \
927 product(ccstrlist, OnOutOfMemoryError, "", \
928 "Run user-defined commands on first java.lang.OutOfMemoryError") \
929 \
930 manageable(bool, HeapDumpBeforeFullGC, false, \
931 "Dump heap to file before any major stop-the-world GC") \
932 \
933 manageable(bool, HeapDumpAfterFullGC, false, \
934 "Dump heap to file after any major stop-the-world GC") \
935 \
936 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
937 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
938 \
939 manageable(ccstr, HeapDumpPath, NULL, \
940 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \
941 "directory) of the dump file (defaults to java_pid<pid>.hprof " \
942 "in the working directory)") \
943 \
944 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
945 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
946 "when the heap usage is larger than this") \
947 \
948 develop(uintx, HeapDumpSegmentSize, 1*G, \
949 "Approximate segment size when generating a segmented heap dump") \
950 \
951 develop(bool, BreakAtWarning, false, \
952 "Execute breakpoint upon encountering VM warning") \
953 \
954 develop(bool, TraceVMOperation, false, \
955 "Trace VM operations") \
956 \
957 develop(bool, UseFakeTimers, false, \
958 "Tell whether the VM should use system time or a fake timer") \
959 \
960 product(ccstr, NativeMemoryTracking, "off", \
961 "Native memory tracking options") \
962 \
963 diagnostic(bool, PrintNMTStatistics, false, \
964 "Print native memory tracking summary data if it is on") \
965 \
966 diagnostic(bool, LogCompilation, false, \
967 "Log compilation activity in detail to LogFile") \
968 \
969 product(bool, PrintCompilation, false, \
970 "Print compilations") \
971 \
972 diagnostic(bool, TraceNMethodInstalls, false, \
973 "Trace nmethod installation") \
974 \
975 diagnostic(intx, ScavengeRootsInCode, 2, \
976 "0: do not allow scavengable oops in the code cache; " \
977 "1: allow scavenging from the code cache; " \
978 "2: emit as many constants as the compiler can see") \
979 \
980 product(bool, AlwaysRestoreFPU, false, \
981 "Restore the FPU control word after every JNI call (expensive)") \
982 \
983 diagnostic(bool, PrintCompilation2, false, \
984 "Print additional statistics per compilation") \
985 \
986 diagnostic(bool, PrintAdapterHandlers, false, \
987 "Print code generated for i2c/c2i adapters") \
988 \
989 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \
990 "Verify that i2c/c2i adapters are called properly") \
991 \
992 develop(bool, VerifyAdapterSharing, false, \
993 "Verify that the code for shared adapters is the equivalent") \
994 \
995 diagnostic(bool, PrintAssembly, false, \
996 "Print assembly code (using external disassembler.so)") \
997 \
998 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
999 "Print options string passed to disassembler.so") \
1000 \
1001 diagnostic(bool, PrintNMethods, false, \
1002 "Print assembly code for nmethods when generated") \
1003 \
1004 diagnostic(bool, PrintNativeNMethods, false, \
1005 "Print assembly code for native nmethods when generated") \
1006 \
1007 develop(bool, PrintDebugInfo, false, \
1008 "Print debug information for all nmethods when generated") \
1009 \
1010 develop(bool, PrintRelocations, false, \
1011 "Print relocation information for all nmethods when generated") \
1012 \
1013 develop(bool, PrintDependencies, false, \
1014 "Print dependency information for all nmethods when generated") \
1015 \
1016 develop(bool, PrintExceptionHandlers, false, \
1017 "Print exception handler tables for all nmethods when generated") \
1018 \
1019 develop(bool, StressCompiledExceptionHandlers, false, \
1020 "Exercise compiled exception handlers") \
1021 \
1022 develop(bool, InterceptOSException, false, \
1023 "Start debugger when an implicit OS (e.g. NULL) " \
1024 "exception happens") \
1025 \
1026 product(bool, PrintCodeCache, false, \
1027 "Print the code cache memory usage when exiting") \
1028 \
1029 develop(bool, PrintCodeCache2, false, \
1030 "Print detailed usage information on the code cache when exiting")\
1031 \
1032 product(bool, PrintCodeCacheOnCompilation, false, \
1033 "Print the code cache memory usage each time a method is " \
1034 "compiled") \
1035 \
1036 diagnostic(bool, PrintStubCode, false, \
1037 "Print generated stub code") \
1038 \
1039 product(bool, StackTraceInThrowable, true, \
1040 "Collect backtrace in throwable when exception happens") \
1041 \
1042 product(bool, OmitStackTraceInFastThrow, true, \
1043 "Omit backtraces for some 'hot' exceptions in optimized code") \
1044 \
1045 product(bool, ProfilerPrintByteCodeStatistics, false, \
1046 "Print bytecode statistics when dumping profiler output") \
1047 \
1048 product(bool, ProfilerRecordPC, false, \
1049 "Collect ticks for each 16 byte interval of compiled code") \
1050 \
1051 product(bool, ProfileVM, false, \
1052 "Profile ticks that fall within VM (either in the VM Thread " \
1053 "or VM code called through stubs)") \
1054 \
1055 product(bool, ProfileIntervals, false, \
1056 "Print profiles for each interval (see ProfileIntervalsTicks)") \
1057 \
1058 notproduct(bool, ProfilerCheckIntervals, false, \
1059 "Collect and print information on spacing of profiler ticks") \
1060 \
1061 develop(bool, PrintJVMWarnings, false, \
1062 "Print warnings for unimplemented JVM functions") \
1063 \
1064 product(bool, PrintWarnings, true, \
1065 "Print JVM warnings to output stream") \
1066 \
1067 notproduct(uintx, WarnOnStalledSpinLock, 0, \
1068 "Print warnings for stalled SpinLocks") \
1069 \
1070 product(bool, RegisterFinalizersAtInit, true, \
1071 "Register finalizable objects at end of Object.<init> or " \
1072 "after allocation") \
1073 \
1074 develop(bool, RegisterReferences, true, \
1075 "Tell whether the VM should register soft/weak/final/phantom " \
1076 "references") \
1077 \
1078 develop(bool, IgnoreRewrites, false, \
1079 "Suppress rewrites of bytecodes in the oopmap generator. " \
1080 "This is unsafe!") \
1081 \
1082 develop(bool, PrintCodeCacheExtension, false, \
1083 "Print extension of code cache") \
1084 \
1085 develop(bool, UsePrivilegedStack, true, \
1086 "Enable the security JVM functions") \
1087 \
1088 develop(bool, ProtectionDomainVerification, true, \
1089 "Verify protection domain before resolution in system dictionary")\
1090 \
1091 product(bool, ClassUnloading, true, \
1092 "Do unloading of classes") \
1093 \
1094 product(bool, ClassUnloadingWithConcurrentMark, true, \
1095 "Do unloading of classes with a concurrent marking cycle") \
1096 \
1097 develop(bool, DisableStartThread, false, \
1098 "Disable starting of additional Java threads " \
1099 "(for debugging only)") \
1100 \
1101 develop(bool, MemProfiling, false, \
1102 "Write memory usage profiling to log file") \
1103 \
1104 notproduct(bool, PrintSystemDictionaryAtExit, false, \
1105 "Print the system dictionary at exit") \
1106 \
1107 experimental(intx, PredictedLoadedClassCount, 0, \
1108 "Experimental: Tune loaded class cache starting size") \
1109 \
1110 diagnostic(bool, UnsyncloadClass, false, \
1111 "Unstable: VM calls loadClass unsynchronized. Custom " \
1112 "class loader must call VM synchronized for findClass " \
1113 "and defineClass.") \
1114 \
1115 product(bool, AlwaysLockClassLoader, false, \
1116 "Require the VM to acquire the class loader lock before calling " \
1117 "loadClass() even for class loaders registering " \
1118 "as parallel capable") \
1119 \
1120 product(bool, AllowParallelDefineClass, false, \
1121 "Allow parallel defineClass requests for class loaders " \
1122 "registering as parallel capable") \
1123 \
1124 product(bool, MustCallLoadClassInternal, false, \
1125 "Call loadClassInternal() rather than loadClass()") \
1126 \
1127 product_pd(bool, DontYieldALot, \
1128 "Throw away obvious excess yield calls (for Solaris only)") \
1129 \
1130 product_pd(bool, ConvertSleepToYield, \
1131 "Convert sleep(0) to thread yield " \
1132 "(may be off for Solaris to improve GUI)") \
1133 \
1134 product(bool, ConvertYieldToSleep, false, \
1135 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
1136 "behavior (Solaris only)") \
1137 \
1138 product(bool, UseBoundThreads, true, \
1139 "Bind user level threads to kernel threads (for Solaris only)") \
1140 \
1141 develop(bool, UseDetachedThreads, true, \
1142 "Use detached threads that are recycled upon termination " \
1143 "(for Solaris only)") \
1144 \
1145 experimental(bool, DisablePrimordialThreadGuardPages, false, \
1146 "Disable the use of stack guard pages if the JVM is loaded " \
1147 "on the primordial process thread") \
1148 \
1149 product(bool, UseLWPSynchronization, true, \
1150 "Use LWP-based instead of libthread-based synchronization " \
1151 "(SPARC only)") \
1152 \
1153 product(ccstr, SyncKnobs, NULL, \
1154 "(Unstable) Various monitor synchronization tunables") \
1155 \
1156 product(intx, EmitSync, 0, \
1157 "(Unsafe, Unstable) " \
1158 "Control emission of inline sync fast-path code") \
1159 \
1160 product(intx, MonitorBound, 0, "Bound Monitor population") \
1161 \
1162 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
1163 \
1164 product(intx, SyncFlags, 0, "(Unsafe, Unstable) Experimental Sync flags") \
1165 \
1166 product(intx, SyncVerbose, 0, "(Unstable)") \
1167 \
1168 product(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \
1169 \
1170 product(intx, hashCode, 5, \
1171 "(Unstable) select hashCode generation algorithm") \
1172 \
1173 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
1174 "(Unstable, Linux-specific) " \
1175 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \
1176 \
1177 product(bool, FilterSpuriousWakeups, true, \
1178 "Prevent spurious or premature wakeups from object.wait " \
1179 "(Solaris only)") \
1180 \
1181 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \
1182 \
1183 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \
1184 \
1185 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \
1186 \
1187 develop(bool, UsePthreads, false, \
1188 "Use pthread-based instead of libthread-based synchronization " \
1189 "(SPARC only)") \
1190 \
1191 product(bool, AdjustConcurrency, false, \
1192 "Call thr_setconcurrency at thread creation time to avoid " \
1193 "LWP starvation on MP systems (for Solaris Only)") \
1194 \
1195 product(bool, ReduceSignalUsage, false, \
1196 "Reduce the use of OS signals in Java and/or the VM") \
1197 \
1198 develop_pd(bool, ShareVtableStubs, \
1199 "Share vtable stubs (smaller code but worse branch prediction") \
1200 \
1201 develop(bool, LoadLineNumberTables, true, \
1202 "Tell whether the class file parser loads line number tables") \
1203 \
1204 develop(bool, LoadLocalVariableTables, true, \
1205 "Tell whether the class file parser loads local variable tables") \
1206 \
1207 develop(bool, LoadLocalVariableTypeTables, true, \
1208 "Tell whether the class file parser loads local variable type" \
1209 "tables") \
1210 \
1211 product(bool, AllowUserSignalHandlers, false, \
1212 "Do not complain if the application installs signal handlers " \
1213 "(Solaris & Linux only)") \
1214 \
1215 product(bool, UseSignalChaining, true, \
1216 "Use signal-chaining to invoke signal handlers installed " \
1217 "by the application (Solaris & Linux only)") \
1218 \
1219 product(bool, UseAltSigs, false, \
1220 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
1221 "internal signals (Solaris only)") \
1222 \
1223 product(bool, AllowJNIEnvProxy, false, \
1224 "Allow JNIEnv proxies for jdbx") \
1225 \
1226 product(bool, JNIDetachReleasesMonitors, true, \
1227 "JNI DetachCurrentThread releases monitors owned by thread") \
1228 \
1229 product(bool, RestoreMXCSROnJNICalls, false, \
1230 "Restore MXCSR when returning from JNI calls") \
1231 \
1232 product(bool, CheckJNICalls, false, \
1233 "Verify all arguments to JNI calls") \
1234 \
1235 product(bool, CheckEndorsedAndExtDirs, false, \
1236 "Verify the endorsed and extension directories are not used") \
1237 \
1238 product(bool, UseFastJNIAccessors, true, \
1239 "Use optimized versions of Get<Primitive>Field") \
1240 \
1241 product(intx, MaxJNILocalCapacity, 65536, \
1242 "Maximum allowable local JNI handle capacity to " \
1243 "EnsureLocalCapacity() and PushLocalFrame(), " \
1244 "where <= 0 is unlimited, default: 65536") \
1245 \
1246 product(bool, EagerXrunInit, false, \
1247 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1248 "but not all -Xrun libraries may support the state of the VM " \
1249 "at this time") \
1250 \
1251 product(bool, PreserveAllAnnotations, false, \
1252 "Preserve RuntimeInvisibleAnnotations as well " \
1253 "as RuntimeVisibleAnnotations") \
1254 \
1255 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1256 "Number of OutOfMemoryErrors preallocated with backtrace") \
1257 \
1258 product(bool, LazyBootClassLoader, true, \
1259 "Enable/disable lazy opening of boot class path entries") \
1260 \
1261 product(bool, UseXMMForArrayCopy, false, \
1262 "Use SSE2 MOVQ instruction for Arraycopy") \
1263 \
1264 product(intx, FieldsAllocationStyle, 1, \
1265 "0 - type based with oops first, 1 - with oops last, " \
1266 "2 - oops in super and sub classes are together") \
1267 \
1268 product(bool, CompactFields, true, \
1269 "Allocate nonstatic fields in gaps between previous fields") \
1270 \
1271 notproduct(bool, PrintFieldLayout, false, \
1272 "Print field layout for each class") \
1273 \
1274 product(intx, ContendedPaddingWidth, 128, \
1275 "How many bytes to pad the fields/classes marked @Contended with")\
1276 \
1277 product(bool, EnableContended, true, \
1278 "Enable @Contended annotation support") \
1279 \
1280 product(bool, RestrictContended, true, \
1281 "Restrict @Contended to trusted classes") \
1282 \
1283 product(bool, UseBiasedLocking, true, \
1284 "Enable biased locking in JVM") \
1285 \
1286 product(intx, BiasedLockingStartupDelay, 4000, \
1287 "Number of milliseconds to wait before enabling biased locking") \
1288 \
1289 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1290 "Print statistics of biased locking in JVM") \
1291 \
1292 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1293 "Threshold of number of revocations per type to try to " \
1294 "rebias all objects in the heap of that type") \
1295 \
1296 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1297 "Threshold of number of revocations per type to permanently " \
1298 "revoke biases of all objects in the heap of that type") \
1299 \
1300 product(intx, BiasedLockingDecayTime, 25000, \
1301 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1302 "type after previous bulk rebias") \
1303 \
1304 product(bool, ExitOnOutOfMemoryError, false, \
1305 "JVM exits on the first occurrence of an out-of-memory error") \
1306 \
1307 product(bool, CrashOnOutOfMemoryError, false, \
1308 "JVM aborts, producing an error log and core/mini dump, on the " \
1309 "first occurrence of an out-of-memory error") \
1310 \
1311 /* tracing */ \
1312 \
1313 notproduct(bool, TraceRuntimeCalls, false, \
1314 "Trace run-time calls") \
1315 \
1316 develop(bool, TraceJNICalls, false, \
1317 "Trace JNI calls") \
1318 \
1319 develop(bool, StressRewriter, false, \
1320 "Stress linktime bytecode rewriting") \
1321 \
1322 notproduct(bool, TraceJVMCalls, false, \
1323 "Trace JVM calls") \
1324 \
1325 product(ccstr, TraceJVMTI, NULL, \
1326 "Trace flags for JVMTI functions and events") \
1327 \
1328 /* This option can change an EMCP method into an obsolete method. */ \
1329 /* This can affect tests that except specific methods to be EMCP. */ \
1330 /* This option should be used with caution. */ \
1331 product(bool, StressLdcRewrite, false, \
1332 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1333 \
1334 product(intx, TraceRedefineClasses, 0, \
1335 "Trace level for JVMTI RedefineClasses") \
1336 \
1337 develop(bool, StressMethodComparator, false, \
1338 "Run the MethodComparator on all loaded methods") \
1339 \
1340 /* change to false by default sometime after Mustang */ \
1341 product(bool, VerifyMergedCPBytecodes, true, \
1342 "Verify bytecodes after RedefineClasses constant pool merging") \
1343 \
1344 develop(bool, TraceJNIHandleAllocation, false, \
1345 "Trace allocation/deallocation of JNI handle blocks") \
1346 \
1347 develop(bool, TraceThreadEvents, false, \
1348 "Trace all thread events") \
1349 \
1350 develop(bool, TraceBytecodes, false, \
1351 "Trace bytecode execution") \
1352 \
1353 develop(bool, TraceClassInitialization, false, \
1354 "Trace class initialization") \
1355 \
1356 develop(bool, TraceExceptions, false, \
1357 "Trace exceptions") \
1358 \
1359 develop(bool, TraceICs, false, \
1360 "Trace inline cache changes") \
1361 \
1362 notproduct(bool, TraceInvocationCounterOverflow, false, \
1363 "Trace method invocation counter overflow") \
1364 \
1365 develop(bool, TraceInlineCacheClearing, false, \
1366 "Trace clearing of inline caches in nmethods") \
1367 \
1368 develop(bool, TraceDependencies, false, \
1369 "Trace dependencies") \
1370 \
1371 develop(bool, VerifyDependencies, trueInDebug, \
1372 "Exercise and verify the compilation dependency mechanism") \
1373 \
1374 develop(bool, TraceNewOopMapGeneration, false, \
1375 "Trace OopMapGeneration") \
1376 \
1377 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1378 "Trace OopMapGeneration: print detailed cell states") \
1379 \
1380 develop(bool, TimeOopMap, false, \
1381 "Time calls to GenerateOopMap::compute_map() in sum") \
1382 \
1383 develop(bool, TimeOopMap2, false, \
1384 "Time calls to GenerateOopMap::compute_map() individually") \
1385 \
1386 develop(bool, TraceMonitorMismatch, false, \
1387 "Trace monitor matching failures during OopMapGeneration") \
1388 \
1389 develop(bool, TraceOopMapRewrites, false, \
1390 "Trace rewriting of method oops during oop map generation") \
1391 \
1392 develop(bool, TraceSafepoint, false, \
1393 "Trace safepoint operations") \
1394 \
1395 develop(bool, TraceICBuffer, false, \
1396 "Trace usage of IC buffer") \
1397 \
1398 develop(bool, TraceCompiledIC, false, \
1399 "Trace changes of compiled IC") \
1400 \
1401 notproduct(bool, TraceZapDeadLocals, false, \
1402 "Trace zapping dead locals") \
1403 \
1404 develop(bool, TraceStartupTime, false, \
1405 "Trace setup time") \
1406 \
1407 develop(bool, TraceProtectionDomainVerification, false, \
1408 "Trace protection domain verification") \
1409 \
1410 develop(bool, TraceClearedExceptions, false, \
1411 "Print when an exception is forcibly cleared") \
1412 \
1413 product(bool, TraceClassResolution, false, \
1414 "Trace all constant pool resolutions (for debugging)") \
1415 \
1416 product(bool, TraceBiasedLocking, false, \
1417 "Trace biased locking in JVM") \
1418 \
1419 product(bool, TraceMonitorInflation, false, \
1420 "Trace monitor inflation in JVM") \
1421 \
1422 /* gc */ \
1423 \
1424 product(bool, UseSerialGC, false, \
1425 "Use the Serial garbage collector") \
1426 \
1427 product(bool, UseG1GC, false, \
1428 "Use the Garbage-First garbage collector") \
1429 \
1430 product(bool, UseParallelGC, false, \
1431 "Use the Parallel Scavenge garbage collector") \
1432 \
1433 product(bool, UseParallelOldGC, false, \
1434 "Use the Parallel Old garbage collector") \
1435 \
1436 product(uintx, HeapMaximumCompactionInterval, 20, \
1437 "How often should we maximally compact the heap (not allowing " \
1438 "any dead space)") \
1439 \
1440 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1441 "The collection count for the first maximum compaction") \
1442 \
1443 product(bool, UseMaximumCompactionOnSystemGC, true, \
1444 "Use maximum compaction in the Parallel Old garbage collector " \
1445 "for a system GC") \
1446 \
1447 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1448 "The mean used by the parallel compact dead wood " \
1449 "limiter (a number between 0-100)") \
1450 \
1451 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1452 "The standard deviation used by the parallel compact dead wood " \
1453 "limiter (a number between 0-100)") \
1454 \
1455 product(uintx, ParallelGCThreads, 0, \
1456 "Number of parallel threads parallel gc will use") \
1457 \
1458 product(bool, UseDynamicNumberOfGCThreads, false, \
1459 "Dynamically choose the number of parallel threads " \
1460 "parallel gc will use") \
1461 \
1462 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
1463 "Force dynamic selection of the number of " \
1464 "parallel threads parallel gc will use to aid debugging") \
1465 \
1466 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \
1467 "Size of heap (bytes) per GC thread used in calculating the " \
1468 "number of GC threads") \
1469 \
1470 product(bool, TraceDynamicGCThreads, false, \
1471 "Trace the dynamic GC thread usage") \
1472 \
1473 develop(bool, ParallelOldGCSplitALot, false, \
1474 "Provoke splitting (copying data from a young gen space to " \
1475 "multiple destination spaces)") \
1476 \
1477 develop(uintx, ParallelOldGCSplitInterval, 3, \
1478 "How often to provoke splitting a young gen space") \
1479 \
1480 product(uintx, ConcGCThreads, 0, \
1481 "Number of threads concurrent gc will use") \
1482 \
1483 product(uintx, YoungPLABSize, 4096, \
1484 "Size of young gen promotion LAB's (in HeapWords)") \
1485 \
1486 product(uintx, OldPLABSize, 1024, \
1487 "Size of old gen promotion LAB's (in HeapWords)") \
1488 \
1489 product(uintx, GCTaskTimeStampEntries, 200, \
1490 "Number of time stamp entries per gc worker thread") \
1491 \
1492 product(bool, AlwaysTenure, false, \
1493 "Always tenure objects in eden (ParallelGC only)") \
1494 \
1495 product(bool, NeverTenure, false, \
1496 "Never tenure objects in eden, may tenure on overflow " \
1497 "(ParallelGC only)") \
1498 \
1499 product(bool, ScavengeBeforeFullGC, true, \
1500 "Scavenge youngest generation before each full GC, " \
1501 "used with UseParallelGC") \
1502 \
1503 develop(bool, ScavengeWithObjectsInToSpace, false, \
1504 "Allow scavenges to occur when to-space contains objects") \
1505 \
1506 product(bool, UseConcMarkSweepGC, false, \
1507 "Use Concurrent Mark-Sweep GC in the old generation") \
1508 \
1509 product(bool, ExplicitGCInvokesConcurrent, false, \
1510 "A System.gc() request invokes a concurrent collection; " \
1511 "(effective only when UseConcMarkSweepGC)") \
1512 \
1513 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1514 "A System.gc() request invokes a concurrent collection and " \
1515 "also unloads classes during such a concurrent gc cycle " \
1516 "(effective only when UseConcMarkSweepGC)") \
1517 \
1518 product(bool, GCLockerInvokesConcurrent, false, \
1519 "The exit of a JNI critical section necessitating a scavenge, " \
1520 "also kicks off a background concurrent collection") \
1521 \
1522 product(uintx, GCLockerEdenExpansionPercent, 5, \
1523 "How much the GC can expand the eden by while the GC locker " \
1524 "is active (as a percentage)") \
1525 \
1526 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \
1527 "Number of times to retry allocations when " \
1528 "blocked by the GC locker") \
1529 \
1530 develop(bool, UseCMSAdaptiveFreeLists, true, \
1531 "Use adaptive free lists in the CMS generation") \
1532 \
1533 develop(bool, UseAsyncConcMarkSweepGC, true, \
1534 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1535 \
1536 develop(bool, RotateCMSCollectionTypes, false, \
1537 "Rotate the CMS collections among concurrent and STW") \
1538 \
1539 product(bool, UseCMSBestFit, true, \
1540 "Use CMS best fit allocation strategy") \
1541 \
1542 product(bool, UseCMSCollectionPassing, true, \
1543 "Use passing of collection from background to foreground") \
1544 \
1545 product(bool, UseParNewGC, false, \
1546 "Use parallel threads in the new generation") \
1547 \
1548 product(bool, ParallelGCVerbose, false, \
1549 "Verbose output for parallel gc") \
1550 \
1551 product(uintx, ParallelGCBufferWastePct, 10, \
1552 "Wasted fraction of parallel allocation buffer") \
1553 \
1554 diagnostic(bool, ParallelGCRetainPLAB, false, \
1555 "Retain parallel allocation buffers across scavenges; " \
1556 "it is disabled because this currently conflicts with " \
1557 "parallel card scanning under certain conditions.") \
1558 \
1559 product(uintx, TargetPLABWastePct, 10, \
1560 "Target wasted space in last buffer as percent of overall " \
1561 "allocation") \
1562 \
1563 product(uintx, PLABWeight, 75, \
1564 "Percentage (0-100) used to weigh the current sample when " \
1565 "computing exponentially decaying average for ResizePLAB") \
1566 \
1567 product(bool, ResizePLAB, true, \
1568 "Dynamically resize (survivor space) promotion LAB's") \
1569 \
1570 product(bool, PrintPLAB, false, \
1571 "Print (survivor space) promotion LAB's sizing decisions") \
1572 \
1573 product(intx, ParGCArrayScanChunk, 50, \
1574 "Scan a subset of object array and push remainder, if array is " \
1575 "bigger than this") \
1576 \
1577 product(bool, ParGCUseLocalOverflow, false, \
1578 "Instead of a global overflow list, use local overflow stacks") \
1579 \
1580 product(bool, ParGCTrimOverflow, true, \
1581 "Eagerly trim the local overflow lists " \
1582 "(when ParGCUseLocalOverflow)") \
1583 \
1584 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1585 "Simulate work queue overflow in ParNew") \
1586 \
1587 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1588 "An `interval' counter that determines how frequently " \
1589 "we simulate overflow; a smaller number increases frequency") \
1590 \
1591 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1592 "The desired number of objects to claim from the overflow list") \
1593 \
1594 diagnostic(uintx, ParGCStridesPerThread, 2, \
1595 "The number of strides per worker thread that we divide up the " \
1596 "card table scanning work into") \
1597 \
1598 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
1599 "The number of cards in each chunk of the parallel chunks used " \
1600 "during card table scanning") \
1601 \
1602 product(uintx, CMSParPromoteBlocksToClaim, 16, \
1603 "Number of blocks to attempt to claim when refilling CMS LAB's " \
1604 "for parallel GC") \
1605 \
1606 product(uintx, OldPLABWeight, 50, \
1607 "Percentage (0-100) used to weight the current sample when " \
1608 "computing exponentially decaying average for resizing " \
1609 "CMSParPromoteBlocksToClaim") \
1610 \
1611 product(bool, ResizeOldPLAB, true, \
1612 "Dynamically resize (old gen) promotion LAB's") \
1613 \
1614 product(bool, PrintOldPLAB, false, \
1615 "Print (old gen) promotion LAB's sizing decisions") \
1616 \
1617 product(uintx, CMSOldPLABMin, 16, \
1618 "Minimum size of CMS gen promotion LAB caches per worker " \
1619 "per block size") \
1620 \
1621 product(uintx, CMSOldPLABMax, 1024, \
1622 "Maximum size of CMS gen promotion LAB caches per worker " \
1623 "per block size") \
1624 \
1625 product(uintx, CMSOldPLABNumRefills, 4, \
1626 "Nominal number of refills of CMS gen promotion LAB cache " \
1627 "per worker per block size") \
1628 \
1629 product(bool, CMSOldPLABResizeQuicker, false, \
1630 "React on-the-fly during a scavenge to a sudden " \
1631 "change in block demand rate") \
1632 \
1633 product(uintx, CMSOldPLABToleranceFactor, 4, \
1634 "The tolerance of the phase-change detector for on-the-fly " \
1635 "PLAB resizing during a scavenge") \
1636 \
1637 product(uintx, CMSOldPLABReactivityFactor, 2, \
1638 "The gain in the feedback loop for on-the-fly PLAB resizing " \
1639 "during a scavenge") \
1640 \
1641 product(bool, AlwaysPreTouch, false, \
1642 "Force all freshly committed pages to be pre-touched") \
1643 \
1644 product_pd(uintx, CMSYoungGenPerWorker, \
1645 "The maximum size of young gen chosen by default per GC worker " \
1646 "thread available") \
1647 \
1648 product(bool, CMSIncrementalMode, false, \
1649 "Whether CMS GC should operate in \"incremental\" mode") \
1650 \
1651 product(uintx, CMSIncrementalDutyCycle, 10, \
1652 "Percentage (0-100) of CMS incremental mode duty cycle. If " \
1653 "CMSIncrementalPacing is enabled, then this is just the initial " \
1654 "value.") \
1655 \
1656 product(bool, CMSIncrementalPacing, true, \
1657 "Whether the CMS incremental mode duty cycle should be " \
1658 "automatically adjusted") \
1659 \
1660 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1661 "Minimum percentage (0-100) of the CMS incremental duty cycle " \
1662 "used when CMSIncrementalPacing is enabled") \
1663 \
1664 product(uintx, CMSIncrementalSafetyFactor, 10, \
1665 "Percentage (0-100) used to add conservatism when computing the " \
1666 "duty cycle") \
1667 \
1668 product(uintx, CMSIncrementalOffset, 0, \
1669 "Percentage (0-100) by which the CMS incremental mode duty cycle "\
1670 "is shifted to the right within the period between young GCs") \
1671 \
1672 product(uintx, CMSExpAvgFactor, 50, \
1673 "Percentage (0-100) used to weigh the current sample when " \
1674 "computing exponential averages for CMS statistics") \
1675 \
1676 product(uintx, CMS_FLSWeight, 75, \
1677 "Percentage (0-100) used to weigh the current sample when " \
1678 "computing exponentially decaying averages for CMS FLS " \
1679 "statistics") \
1680 \
1681 product(uintx, CMS_FLSPadding, 1, \
1682 "The multiple of deviation from mean to use for buffering " \
1683 "against volatility in free list demand") \
1684 \
1685 product(uintx, FLSCoalescePolicy, 2, \
1686 "CMS: aggressiveness level for coalescing, increasing " \
1687 "from 0 to 4") \
1688 \
1689 product(bool, FLSAlwaysCoalesceLarge, false, \
1690 "CMS: larger free blocks are always available for coalescing") \
1691 \
1692 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1693 "CMS: the smaller the percentage the greater the coalescing " \
1694 "force") \
1695 \
1696 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1697 "CMS: the factor by which to inflate estimated demand of small " \
1698 "block sizes to prevent coalescing with an adjoining block") \
1699 \
1700 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1701 "CMS: the factor by which to inflate estimated demand of large " \
1702 "block sizes to prevent coalescing with an adjoining block") \
1703 \
1704 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1705 "CMS: the factor by which to inflate estimated demand of small " \
1706 "block sizes to prevent splitting to supply demand for smaller " \
1707 "blocks") \
1708 \
1709 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1710 "CMS: the factor by which to inflate estimated demand of large " \
1711 "block sizes to prevent splitting to supply demand for smaller " \
1712 "blocks") \
1713 \
1714 product(bool, CMSExtrapolateSweep, false, \
1715 "CMS: cushion for block demand during sweep") \
1716 \
1717 product(uintx, CMS_SweepWeight, 75, \
1718 "Percentage (0-100) used to weight the current sample when " \
1719 "computing exponentially decaying average for inter-sweep " \
1720 "duration") \
1721 \
1722 product(uintx, CMS_SweepPadding, 1, \
1723 "The multiple of deviation from mean to use for buffering " \
1724 "against volatility in inter-sweep duration") \
1725 \
1726 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1727 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1728 "duration exceeds this threshold in milliseconds") \
1729 \
1730 develop(bool, CMSTraceIncrementalMode, false, \
1731 "Trace CMS incremental mode") \
1732 \
1733 develop(bool, CMSTraceIncrementalPacing, false, \
1734 "Trace CMS incremental mode pacing computation") \
1735 \
1736 develop(bool, CMSTraceThreadState, false, \
1737 "Trace the CMS thread state (enable the trace_state() method)") \
1738 \
1739 product(bool, CMSClassUnloadingEnabled, true, \
1740 "Whether class unloading enabled when using CMS GC") \
1741 \
1742 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1743 "When CMS class unloading is enabled, the maximum CMS cycle " \
1744 "count for which classes may not be unloaded") \
1745 \
1746 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1747 "Compact when asked to collect CMS gen with " \
1748 "clear_all_soft_refs()") \
1749 \
1750 product(bool, UseCMSCompactAtFullCollection, true, \
1751 "Use Mark-Sweep-Compact algorithm at full collections") \
1752 \
1753 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1754 "Number of CMS full collection done before compaction if > 0") \
1755 \
1756 develop(intx, CMSDictionaryChoice, 0, \
1757 "Use BinaryTreeDictionary as default in the CMS generation") \
1758 \
1759 product(uintx, CMSIndexedFreeListReplenish, 4, \
1760 "Replenish an indexed free list with this number of chunks") \
1761 \
1762 product(bool, CMSReplenishIntermediate, true, \
1763 "Replenish all intermediate free-list caches") \
1764 \
1765 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1766 "When satisfying batched demand, split blocks from the " \
1767 "IndexedFreeList whose size is a multiple of requested size") \
1768 \
1769 product(bool, CMSLoopWarn, false, \
1770 "Warn in case of excessive CMS looping") \
1771 \
1772 develop(bool, CMSOverflowEarlyRestoration, false, \
1773 "Restore preserved marks early") \
1774 \
1775 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1776 "Size of marking stack") \
1777 \
1778 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1779 "Maximum size of marking stack") \
1780 \
1781 notproduct(bool, CMSMarkStackOverflowALot, false, \
1782 "Simulate frequent marking stack / work queue overflow") \
1783 \
1784 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1785 "An \"interval\" counter that determines how frequently " \
1786 "to simulate overflow; a smaller number increases frequency") \
1787 \
1788 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1789 "(Temporary, subject to experimentation) " \
1790 "Maximum number of abortable preclean iterations, if > 0") \
1791 \
1792 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1793 "(Temporary, subject to experimentation) " \
1794 "Maximum time in abortable preclean (in milliseconds)") \
1795 \
1796 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1797 "(Temporary, subject to experimentation) " \
1798 "Nominal minimum work per abortable preclean iteration") \
1799 \
1800 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
1801 "(Temporary, subject to experimentation) " \
1802 "Time that we sleep between iterations when not given " \
1803 "enough work per iteration") \
1804 \
1805 product(uintx, CMSRescanMultiple, 32, \
1806 "Size (in cards) of CMS parallel rescan task") \
1807 \
1808 product(uintx, CMSConcMarkMultiple, 32, \
1809 "Size (in cards) of CMS concurrent MT marking task") \
1810 \
1811 product(bool, CMSAbortSemantics, false, \
1812 "Whether abort-on-overflow semantics is implemented") \
1813 \
1814 product(bool, CMSParallelInitialMarkEnabled, true, \
1815 "Use the parallel initial mark.") \
1816 \
1817 product(bool, CMSParallelRemarkEnabled, true, \
1818 "Whether parallel remark enabled (only if ParNewGC)") \
1819 \
1820 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1821 "Whether parallel remark of survivor space " \
1822 "enabled (effective only if CMSParallelRemarkEnabled)") \
1823 \
1824 product(bool, CMSPLABRecordAlways, true, \
1825 "Always record survivor space PLAB boundaries (effective only " \
1826 "if CMSParallelSurvivorRemarkEnabled)") \
1827 \
1828 product(bool, CMSEdenChunksRecordAlways, true, \
1829 "Always record eden chunks used for the parallel initial mark " \
1830 "or remark of eden") \
1831 \
1832 product(bool, CMSPrintEdenSurvivorChunks, false, \
1833 "Print the eden and the survivor chunks used for the parallel " \
1834 "initial mark or remark of the eden/survivor spaces") \
1835 \
1836 product(bool, CMSConcurrentMTEnabled, true, \
1837 "Whether multi-threaded concurrent work enabled " \
1838 "(effective only if ParNewGC)") \
1839 \
1840 product(bool, CMSPrecleaningEnabled, true, \
1841 "Whether concurrent precleaning enabled") \
1842 \
1843 product(uintx, CMSPrecleanIter, 3, \
1844 "Maximum number of precleaning iteration passes") \
1845 \
1846 product(uintx, CMSPrecleanNumerator, 2, \
1847 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1848 "ratio") \
1849 \
1850 product(uintx, CMSPrecleanDenominator, 3, \
1851 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1852 "ratio") \
1853 \
1854 product(bool, CMSPrecleanRefLists1, true, \
1855 "Preclean ref lists during (initial) preclean phase") \
1856 \
1857 product(bool, CMSPrecleanRefLists2, false, \
1858 "Preclean ref lists during abortable preclean phase") \
1859 \
1860 product(bool, CMSPrecleanSurvivors1, false, \
1861 "Preclean survivors during (initial) preclean phase") \
1862 \
1863 product(bool, CMSPrecleanSurvivors2, true, \
1864 "Preclean survivors during abortable preclean phase") \
1865 \
1866 product(uintx, CMSPrecleanThreshold, 1000, \
1867 "Do not iterate again if number of dirty cards is less than this")\
1868 \
1869 product(bool, CMSCleanOnEnter, true, \
1870 "Clean-on-enter optimization for reducing number of dirty cards") \
1871 \
1872 product(uintx, CMSRemarkVerifyVariant, 1, \
1873 "Choose variant (1,2) of verification following remark") \
1874 \
1875 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1876 "If Eden size is below this, do not try to schedule remark") \
1877 \
1878 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1879 "The Eden occupancy percentage (0-100) at which " \
1880 "to try and schedule remark pause") \
1881 \
1882 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1883 "Start sampling eden top at least before young gen " \
1884 "occupancy reaches 1/<ratio> of the size at which " \
1885 "we plan to schedule remark") \
1886 \
1887 product(uintx, CMSSamplingGrain, 16*K, \
1888 "The minimum distance between eden samples for CMS (see above)") \
1889 \
1890 product(bool, CMSScavengeBeforeRemark, false, \
1891 "Attempt scavenge before the CMS remark step") \
1892 \
1893 develop(bool, CMSTraceSweeper, false, \
1894 "Trace some actions of the CMS sweeper") \
1895 \
1896 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1897 "Don't drain below this size per parallel worker/thief") \
1898 \
1899 manageable(intx, CMSWaitDuration, 2000, \
1900 "Time in milliseconds that CMS thread waits for young GC") \
1901 \
1902 develop(uintx, CMSCheckInterval, 1000, \
1903 "Interval in milliseconds that CMS thread checks if it " \
1904 "should start a collection cycle") \
1905 \
1906 product(bool, CMSYield, true, \
1907 "Yield between steps of CMS") \
1908 \
1909 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1910 "Bitmap operations should process at most this many bits " \
1911 "between yields") \
1912 \
1913 product(bool, CMSDumpAtPromotionFailure, false, \
1914 "Dump useful information about the state of the CMS old " \
1915 "generation upon a promotion failure") \
1916 \
1917 product(bool, CMSPrintChunksInDump, false, \
1918 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1919 "more detailed information about the free chunks") \
1920 \
1921 product(bool, CMSPrintObjectsInDump, false, \
1922 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1923 "more detailed information about the allocated objects") \
1924 \
1925 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1926 "Verify that all references across the FLS boundary " \
1927 "are to valid objects") \
1928 \
1929 diagnostic(bool, FLSVerifyLists, false, \
1930 "Do lots of (expensive) FreeListSpace verification") \
1931 \
1932 diagnostic(bool, FLSVerifyIndexTable, false, \
1933 "Do lots of (expensive) FLS index table verification") \
1934 \
1935 develop(bool, FLSVerifyDictionary, false, \
1936 "Do lots of (expensive) FLS dictionary verification") \
1937 \
1938 develop(bool, VerifyBlockOffsetArray, false, \
1939 "Do (expensive) block offset array verification") \
1940 \
1941 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
1942 "Maintain _unallocated_block in BlockOffsetArray " \
1943 "(currently applicable only to CMS collector)") \
1944 \
1945 develop(bool, TraceCMSState, false, \
1946 "Trace the state of the CMS collection") \
1947 \
1948 product(intx, RefDiscoveryPolicy, 0, \
1949 "Select type of reference discovery policy: " \
1950 "reference-based(0) or referent-based(1)") \
1951 \
1952 product(bool, ParallelRefProcEnabled, false, \
1953 "Enable parallel reference processing whenever possible") \
1954 \
1955 product(bool, ParallelRefProcBalancingEnabled, true, \
1956 "Enable balancing of reference processing queues") \
1957 \
1958 product(uintx, CMSTriggerRatio, 80, \
1959 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1960 "allocated before a CMS collection cycle commences") \
1961 \
1962 product(uintx, CMSBootstrapOccupancy, 50, \
1963 "Percentage CMS generation occupancy at which to " \
1964 "initiate CMS collection for bootstrapping collection stats") \
1965 \
1966 product(intx, CMSInitiatingOccupancyFraction, -1, \
1967 "Percentage CMS generation occupancy to start a CMS collection " \
1968 "cycle. A negative value means that CMSTriggerRatio is used") \
1969 \
1970 product(uintx, InitiatingHeapOccupancyPercent, 45, \
1971 "Percentage of the (entire) heap occupancy to start a " \
1972 "concurrent GC cycle. It is used by GCs that trigger a " \
1973 "concurrent GC cycle based on the occupancy of the entire heap, " \
1974 "not just one of the generations (e.g., G1). A value of 0 " \
1975 "denotes 'do constant GC cycles'.") \
1976 \
1977 manageable(intx, CMSTriggerInterval, -1, \
1978 "Commence a CMS collection cycle (at least) every so many " \
1979 "milliseconds (0 permanently, -1 disabled)") \
1980 \
1981 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1982 "Only use occupancy as a criterion for starting a CMS collection")\
1983 \
1984 product(uintx, CMSIsTooFullPercentage, 98, \
1985 "An absolute ceiling above which CMS will always consider the " \
1986 "unloading of classes when class unloading is enabled") \
1987 \
1988 develop(bool, CMSTestInFreeList, false, \
1989 "Check if the coalesced range is already in the " \
1990 "free lists as claimed") \
1991 \
1992 notproduct(bool, CMSVerifyReturnedBytes, false, \
1993 "Check that all the garbage collected was returned to the " \
1994 "free lists") \
1995 \
1996 notproduct(bool, ScavengeALot, false, \
1997 "Force scavenge at every Nth exit from the runtime system " \
1998 "(N=ScavengeALotInterval)") \
1999 \
2000 develop(bool, FullGCALot, false, \
2001 "Force full gc at every Nth exit from the runtime system " \
2002 "(N=FullGCALotInterval)") \
2003 \
2004 notproduct(bool, GCALotAtAllSafepoints, false, \
2005 "Enforce ScavengeALot/GCALot at all potential safepoints") \
2006 \
2007 product(bool, PrintPromotionFailure, false, \
2008 "Print additional diagnostic information following " \
2009 "promotion failure") \
2010 \
2011 notproduct(bool, PromotionFailureALot, false, \
2012 "Use promotion failure handling on every youngest generation " \
2013 "collection") \
2014 \
2015 develop(uintx, PromotionFailureALotCount, 1000, \
2016 "Number of promotion failures occurring at ParGCAllocBuffer " \
2017 "refill attempts (ParNew) or promotion attempts " \
2018 "(other young collectors)") \
2019 \
2020 develop(uintx, PromotionFailureALotInterval, 5, \
2021 "Total collections between promotion failures alot") \
2022 \
2023 experimental(uintx, WorkStealingSleepMillis, 1, \
2024 "Sleep time when sleep is used for yields") \
2025 \
2026 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \
2027 "Number of yields before a sleep is done during workstealing") \
2028 \
2029 experimental(uintx, WorkStealingHardSpins, 4096, \
2030 "Number of iterations in a spin loop between checks on " \
2031 "time out of hard spin") \
2032 \
2033 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \
2034 "Ratio of hard spins to calls to yield") \
2035 \
2036 develop(uintx, ObjArrayMarkingStride, 512, \
2037 "Number of object array elements to push onto the marking stack " \
2038 "before pushing a continuation entry") \
2039 \
2040 develop(bool, MetadataAllocationFailALot, false, \
2041 "Fail metadata allocations at intervals controlled by " \
2042 "MetadataAllocationFailALotInterval") \
2043 \
2044 develop(uintx, MetadataAllocationFailALotInterval, 1000, \
2045 "Metadata allocation failure a lot interval") \
2046 \
2047 develop(bool, TraceMetadataChunkAllocation, false, \
2048 "Trace chunk metadata allocations") \
2049 \
2050 product(bool, TraceMetadataHumongousAllocation, false, \
2051 "Trace humongous metadata allocations") \
2052 \
2053 develop(bool, TraceMetavirtualspaceAllocation, false, \
2054 "Trace virtual space metadata allocations") \
2055 \
2056 notproduct(bool, ExecuteInternalVMTests, false, \
2057 "Enable execution of internal VM tests") \
2058 \
2059 notproduct(bool, VerboseInternalVMTests, false, \
2060 "Turn on logging for internal VM tests.") \
2061 \
2062 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
2063 \
2064 product_pd(bool, ResizeTLAB, \
2065 "Dynamically resize TLAB size for threads") \
2066 \
2067 product(bool, ZeroTLAB, false, \
2068 "Zero out the newly created TLAB") \
2069 \
2070 product(bool, FastTLABRefill, true, \
2071 "Use fast TLAB refill code") \
2072 \
2073 product(bool, PrintTLAB, false, \
2074 "Print various TLAB related information") \
2075 \
2076 product(bool, TLABStats, true, \
2077 "Provide more detailed and expensive TLAB statistics " \
2078 "(with PrintTLAB)") \
2079 \
2080 product_pd(bool, NeverActAsServerClassMachine, \
2081 "Never act like a server-class machine") \
2082 \
2083 product(bool, AlwaysActAsServerClassMachine, false, \
2084 "Always act like a server-class machine") \
2085 \
2086 product_pd(uint64_t, MaxRAM, \
2087 "Real memory size (in bytes) used to set maximum heap size") \
2088 \
2089 product(bool, AggressiveHeap, false, \
2090 "Optimize heap options for long-running memory intensive apps") \
2091 \
2092 product(uintx, ErgoHeapSizeLimit, 0, \
2093 "Maximum ergonomically set heap size (in bytes); zero means use " \
2094 "MaxRAM * MaxRAMPercentage / 100") \
2095 \
2096 experimental(bool, UseCGroupMemoryLimitForHeap, false, \
2097 "Use CGroup memory limit as physical memory limit for heap " \
2098 "sizing" \
2099 "Deprecated, replaced by container support") \
2100 \
2101 diagnostic(bool, PrintContainerInfo, false, \
2102 "Print container related information") \
2103 \
2104 diagnostic(bool, PrintActiveCpus, false, \
2105 "Print the number of CPUs detected in os::active_processor_count") \
2106 \
2107 product(uintx, MaxRAMFraction, 4, \
2108 "Maximum fraction (1/n) of real memory used for maximum heap " \
2109 "size") \
2110 \
2111 product(uintx, DefaultMaxRAMFraction, 4, \
2112 "Maximum fraction (1/n) of real memory used for maximum heap " \
2113 "size; deprecated: to be renamed to MaxRAMFraction") \
2114 \
2115 product(uintx, MinRAMFraction, 2, \
2116 "Minimum fraction (1/n) of real memory used for maxmimum heap " \
2117 "size on systems with small physical memory size") \
2118 \
2119 product(uintx, InitialRAMFraction, 64, \
2120 "Fraction (1/n) of real memory used for initial heap size") \
2121 \
2122 product(double, MaxRAMPercentage, 25.0, \
2123 "Maximum percentage of real memory used for maximum heap size") \
2124 \
2125 product(double, MinRAMPercentage, 50.0, \
2126 "Minimum percentage of real memory used for maximum heap" \
2127 "size on systems with small physical memory size") \
2128 \
2129 product(double, InitialRAMPercentage, 1.5625, \
2130 "Percentage of real memory used for initial heap size") \
2131 \
2132 product(intx, ActiveProcessorCount, -1, \
2133 "Specify the CPU count the VM should use and report as active") \
2134 \
2135 develop(uintx, MaxVirtMemFraction, 2, \
2136 "Maximum fraction (1/n) of virtual memory used for ergonomically "\
2137 "determining maximum heap size") \
2138 \
2139 product(bool, UseAutoGCSelectPolicy, false, \
2140 "Use automatic collection selection policy") \
2141 \
2142 product(uintx, AutoGCSelectPauseMillis, 5000, \
2143 "Automatic GC selection pause threshold in milliseconds") \
2144 \
2145 product(bool, UseAdaptiveSizePolicy, true, \
2146 "Use adaptive generation sizing policies") \
2147 \
2148 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
2149 "Use adaptive survivor sizing policies") \
2150 \
2151 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
2152 "Use adaptive young-old sizing policies at minor collections") \
2153 \
2154 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
2155 "Use adaptive young-old sizing policies at major collections") \
2156 \
2157 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
2158 "Include statistics from System.gc() for adaptive size policy") \
2159 \
2160 product(bool, UseAdaptiveGCBoundary, false, \
2161 "Allow young-old boundary to move") \
2162 \
2163 develop(bool, TraceAdaptiveGCBoundary, false, \
2164 "Trace young-old boundary moves") \
2165 \
2166 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
2167 "Resize the virtual spaces of the young or old generations") \
2168 \
2169 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
2170 "Policy for changing generation size for throughput goals") \
2171 \
2172 product(uintx, AdaptiveSizePausePolicy, 0, \
2173 "Policy for changing generation size for pause goals") \
2174 \
2175 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
2176 "Adjust tenured generation to achieve a minor pause goal") \
2177 \
2178 develop(bool, PSAdjustYoungGenForMajorPause, false, \
2179 "Adjust young generation to achieve a major pause goal") \
2180 \
2181 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
2182 "Number of steps where heuristics is used before data is used") \
2183 \
2184 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
2185 "Number of collections before the adaptive sizing is started") \
2186 \
2187 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
2188 "Collection interval for printing information; zero means never") \
2189 \
2190 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
2191 "Use adaptive minimum footprint as a goal") \
2192 \
2193 product(uintx, AdaptiveSizePolicyWeight, 10, \
2194 "Weight given to exponential resizing, between 0 and 100") \
2195 \
2196 product(uintx, AdaptiveTimeWeight, 25, \
2197 "Weight given to time in adaptive policy, between 0 and 100") \
2198 \
2199 product(uintx, PausePadding, 1, \
2200 "How much buffer to keep for pause time") \
2201 \
2202 product(uintx, PromotedPadding, 3, \
2203 "How much buffer to keep for promotion failure") \
2204 \
2205 product(uintx, SurvivorPadding, 3, \
2206 "How much buffer to keep for survivor overflow") \
2207 \
2208 product(uintx, ThresholdTolerance, 10, \
2209 "Allowed collection cost difference between generations") \
2210 \
2211 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
2212 "If collection costs are within margin, reduce both by full " \
2213 "delta") \
2214 \
2215 product(uintx, YoungGenerationSizeIncrement, 20, \
2216 "Adaptive size percentage change in young generation") \
2217 \
2218 product(uintx, YoungGenerationSizeSupplement, 80, \
2219 "Supplement to YoungedGenerationSizeIncrement used at startup") \
2220 \
2221 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
2222 "Decay factor to YoungedGenerationSizeSupplement") \
2223 \
2224 product(uintx, TenuredGenerationSizeIncrement, 20, \
2225 "Adaptive size percentage change in tenured generation") \
2226 \
2227 product(uintx, TenuredGenerationSizeSupplement, 80, \
2228 "Supplement to TenuredGenerationSizeIncrement used at startup") \
2229 \
2230 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
2231 "Decay factor to TenuredGenerationSizeIncrement") \
2232 \
2233 product(uintx, MaxGCPauseMillis, max_uintx, \
2234 "Adaptive size policy maximum GC pause time goal in millisecond, "\
2235 "or (G1 Only) the maximum GC time per MMU time slice") \
2236 \
2237 product(uintx, GCPauseIntervalMillis, 0, \
2238 "Time slice for MMU specification") \
2239 \
2240 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
2241 "Adaptive size policy maximum GC minor pause time goal " \
2242 "in millisecond") \
2243 \
2244 product(uintx, GCTimeRatio, 99, \
2245 "Adaptive size policy application time to GC time ratio") \
2246 \
2247 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
2248 "Adaptive size scale down factor for shrinking") \
2249 \
2250 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
2251 "Adaptive size decays the major cost for long major intervals") \
2252 \
2253 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
2254 "Time scale over which major costs decay") \
2255 \
2256 product(uintx, MinSurvivorRatio, 3, \
2257 "Minimum ratio of young generation/survivor space size") \
2258 \
2259 product(uintx, InitialSurvivorRatio, 8, \
2260 "Initial ratio of young generation/survivor space size") \
2261 \
2262 product(uintx, BaseFootPrintEstimate, 256*M, \
2263 "Estimate of footprint other than Java Heap") \
2264 \
2265 product(bool, UseGCOverheadLimit, true, \
2266 "Use policy to limit of proportion of time spent in GC " \
2267 "before an OutOfMemory error is thrown") \
2268 \
2269 product(uintx, GCTimeLimit, 98, \
2270 "Limit of the proportion of time spent in GC before " \
2271 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \
2272 \
2273 product(uintx, GCHeapFreeLimit, 2, \
2274 "Minimum percentage of free space after a full GC before an " \
2275 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
2276 \
2277 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
2278 "Number of consecutive collections before gc time limit fires") \
2279 \
2280 product(bool, PrintAdaptiveSizePolicy, false, \
2281 "Print information about AdaptiveSizePolicy") \
2282 \
2283 product(intx, PrefetchCopyIntervalInBytes, -1, \
2284 "How far ahead to prefetch destination area (<= 0 means off)") \
2285 \
2286 product(intx, PrefetchScanIntervalInBytes, -1, \
2287 "How far ahead to prefetch scan area (<= 0 means off)") \
2288 \
2289 product(intx, PrefetchFieldsAhead, -1, \
2290 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2291 \
2292 diagnostic(bool, VerifySilently, false, \
2293 "Do not print the verification progress") \
2294 \
2295 diagnostic(bool, VerifyDuringStartup, false, \
2296 "Verify memory system before executing any Java code " \
2297 "during VM initialization") \
2298 \
2299 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2300 "Verify system before exiting") \
2301 \
2302 diagnostic(bool, VerifyBeforeGC, false, \
2303 "Verify memory system before GC") \
2304 \
2305 diagnostic(bool, VerifyAfterGC, false, \
2306 "Verify memory system after GC") \
2307 \
2308 diagnostic(bool, VerifyDuringGC, false, \
2309 "Verify memory system during GC (between phases)") \
2310 \
2311 diagnostic(ccstrlist, VerifySubSet, "", \
2312 "Memory sub-systems to verify when Verify*GC flag(s) " \
2313 "are enabled. One or more sub-systems can be specified " \
2314 "in a comma separated string. Sub-systems are: " \
2315 "threads, heap, symbol_table, string_table, codecache, " \
2316 "dictionary, classloader_data_graph, metaspace, jni_handles, " \
2317 "c-heap, codecache_oops") \
2318 \
2319 diagnostic(bool, GCParallelVerificationEnabled, true, \
2320 "Enable parallel memory system verification") \
2321 \
2322 diagnostic(bool, DeferInitialCardMark, false, \
2323 "When +ReduceInitialCardMarks, explicitly defer any that " \
2324 "may arise from new_pre_store_barrier") \
2325 \
2326 diagnostic(bool, VerifyRememberedSets, false, \
2327 "Verify GC remembered sets") \
2328 \
2329 diagnostic(bool, VerifyObjectStartArray, true, \
2330 "Verify GC object start array if verify before/after") \
2331 \
2332 product(bool, DisableExplicitGC, false, \
2333 "Ignore calls to System.gc()") \
2334 \
2335 notproduct(bool, CheckMemoryInitialization, false, \
2336 "Check memory initialization") \
2337 \
2338 product(bool, CollectGen0First, false, \
2339 "Collect youngest generation before each full GC") \
2340 \
2341 diagnostic(bool, BindCMSThreadToCPU, false, \
2342 "Bind CMS Thread to CPU if possible") \
2343 \
2344 diagnostic(uintx, CPUForCMSThread, 0, \
2345 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2346 \
2347 product(bool, BindGCTaskThreadsToCPUs, false, \
2348 "Bind GCTaskThreads to CPUs if possible") \
2349 \
2350 product(bool, UseGCTaskAffinity, false, \
2351 "Use worker affinity when asking for GCTasks") \
2352 \
2353 product(uintx, ProcessDistributionStride, 4, \
2354 "Stride through processors when distributing processes") \
2355 \
2356 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2357 "Number of times the coordinator GC thread will sleep while " \
2358 "yielding before giving up and resuming GC") \
2359 \
2360 product(uintx, CMSYieldSleepCount, 0, \
2361 "Number of times a GC thread (minus the coordinator) " \
2362 "will sleep while yielding before giving up and resuming GC") \
2363 \
2364 /* gc tracing */ \
2365 manageable(bool, PrintGC, false, \
2366 "Print message at garbage collection") \
2367 \
2368 manageable(bool, PrintGCDetails, false, \
2369 "Print more details at garbage collection") \
2370 \
2371 manageable(bool, PrintGCDateStamps, false, \
2372 "Print date stamps at garbage collection") \
2373 \
2374 manageable(bool, PrintGCTimeStamps, false, \
2375 "Print timestamps at garbage collection") \
2376 \
2377 manageable(bool, PrintGCID, false, \
2378 "Print an identifier for each garbage collection") \
2379 \
2380 product(bool, PrintGCTaskTimeStamps, false, \
2381 "Print timestamps for individual gc worker thread tasks") \
2382 \
2383 develop(intx, ConcGCYieldTimeout, 0, \
2384 "If non-zero, assert that GC threads yield within this " \
2385 "number of milliseconds") \
2386 \
2387 notproduct(bool, TraceMarkSweep, false, \
2388 "Trace mark sweep") \
2389 \
2390 product(bool, PrintReferenceGC, false, \
2391 "Print times spent handling reference objects during GC " \
2392 "(enabled only when PrintGCDetails)") \
2393 \
2394 develop(bool, TraceReferenceGC, false, \
2395 "Trace handling of soft/weak/final/phantom references") \
2396 \
2397 develop(bool, TraceFinalizerRegistration, false, \
2398 "Trace registration of final references") \
2399 \
2400 notproduct(bool, TraceScavenge, false, \
2401 "Trace scavenge") \
2402 \
2403 product(bool, IgnoreEmptyClassPaths, false, \
2404 "Ignore empty path elements in -classpath") \
2405 \
2406 product(bool, TraceClassPaths, false, \
2407 "Trace processing of class paths") \
2408 \
2409 product_rw(bool, TraceClassLoading, false, \
2410 "Trace all classes loaded") \
2411 \
2412 product(bool, TraceClassLoadingPreorder, false, \
2413 "Trace all classes loaded in order referenced (not loaded)") \
2414 \
2415 product_rw(bool, TraceClassUnloading, false, \
2416 "Trace unloading of classes") \
2417 \
2418 product_rw(bool, TraceLoaderConstraints, false, \
2419 "Trace loader constraints") \
2420 \
2421 develop(bool, TraceClassLoaderData, false, \
2422 "Trace class loader loader_data lifetime") \
2423 \
2424 product(uintx, InitialBootClassLoaderMetaspaceSize, \
2425 NOT_LP64(2200*K) LP64_ONLY(4*M), \
2426 "Initial size of the boot class loader data metaspace") \
2427 \
2428 product(bool, TraceGen0Time, false, \
2429 "Trace accumulated time for Gen 0 collection") \
2430 \
2431 product(bool, TraceGen1Time, false, \
2432 "Trace accumulated time for Gen 1 collection") \
2433 \
2434 product(bool, PrintTenuringDistribution, false, \
2435 "Print tenuring age information") \
2436 \
2437 product_rw(bool, PrintHeapAtGC, false, \
2438 "Print heap layout before and after each GC") \
2439 \
2440 product_rw(bool, PrintHeapAtGCExtended, false, \
2441 "Print extended information about the layout of the heap " \
2442 "when -XX:+PrintHeapAtGC is set") \
2443 \
2444 product(bool, PrintHeapAtSIGBREAK, true, \
2445 "Print heap layout in response to SIGBREAK") \
2446 \
2447 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
2448 "Print a class histogram before any major stop-world GC") \
2449 \
2450 manageable(bool, PrintClassHistogramAfterFullGC, false, \
2451 "Print a class histogram after any major stop-world GC") \
2452 \
2453 manageable(bool, PrintClassHistogram, false, \
2454 "Print a histogram of class instances") \
2455 \
2456 develop(bool, TraceWorkGang, false, \
2457 "Trace activities of work gangs") \
2458 \
2459 product(bool, TraceParallelOldGCTasks, false, \
2460 "Trace multithreaded GC activity") \
2461 \
2462 develop(bool, TraceBlockOffsetTable, false, \
2463 "Print BlockOffsetTable maps") \
2464 \
2465 develop(bool, TraceCardTableModRefBS, false, \
2466 "Print CardTableModRefBS maps") \
2467 \
2468 develop(bool, TraceGCTaskManager, false, \
2469 "Trace actions of the GC task manager") \
2470 \
2471 develop(bool, TraceGCTaskQueue, false, \
2472 "Trace actions of the GC task queues") \
2473 \
2474 diagnostic(bool, TraceGCTaskThread, false, \
2475 "Trace actions of the GC task threads") \
2476 \
2477 product(bool, PrintParallelOldGCPhaseTimes, false, \
2478 "Print the time taken by each phase in ParallelOldGC " \
2479 "(PrintGCDetails must also be enabled)") \
2480 \
2481 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2482 "Trace marking phase in ParallelOldGC") \
2483 \
2484 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2485 "Trace summary phase in ParallelOldGC") \
2486 \
2487 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2488 "Trace compaction phase in ParallelOldGC") \
2489 \
2490 develop(bool, TraceParallelOldGCDensePrefix, false, \
2491 "Trace dense prefix computation for ParallelOldGC") \
2492 \
2493 develop(bool, IgnoreLibthreadGPFault, false, \
2494 "Suppress workaround for libthread GP fault") \
2495 \
2496 product(bool, PrintJNIGCStalls, false, \
2497 "Print diagnostic message when GC is stalled " \
2498 "by JNI critical section") \
2499 \
2500 experimental(double, ObjectCountCutOffPercent, 0.5, \
2501 "The percentage of the used heap that the instances of a class " \
2502 "must occupy for the class to generate a trace event") \
2503 \
2504 /* GC log rotation setting */ \
2505 \
2506 product(bool, UseGCLogFileRotation, false, \
2507 "Rotate gclog files (for long running applications). It requires "\
2508 "-Xloggc:<filename>") \
2509 \
2510 product(uintx, NumberOfGCLogFiles, 0, \
2511 "Number of gclog files in rotation " \
2512 "(default: 0, no rotation)") \
2513 \
2514 product(uintx, GCLogFileSize, 8*K, \
2515 "GC log file size, requires UseGCLogFileRotation. " \
2516 "Set to 0 to only trigger rotation via jcmd") \
2517 \
2518 /* JVMTI heap profiling */ \
2519 \
2520 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2521 "Trace JVMTI object tagging calls") \
2522 \
2523 diagnostic(bool, VerifyBeforeIteration, false, \
2524 "Verify memory system before JVMTI iteration") \
2525 \
2526 /* compiler interface */ \
2527 \
2528 develop(bool, CIPrintCompilerName, false, \
2529 "when CIPrint is active, print the name of the active compiler") \
2530 \
2531 develop(bool, CIPrintCompileQueue, false, \
2532 "display the contents of the compile queue whenever a " \
2533 "compilation is enqueued") \
2534 \
2535 develop(bool, CIPrintRequests, false, \
2536 "display every request for compilation") \
2537 \
2538 product(bool, CITime, false, \
2539 "collect timing information for compilation") \
2540 \
2541 develop(bool, CITimeEach, false, \
2542 "display timing information after each successful compilation") \
2543 \
2544 develop(bool, CICountOSR, false, \
2545 "use a separate counter when assigning ids to osr compilations") \
2546 \
2547 develop(bool, CICompileNatives, true, \
2548 "compile native methods if supported by the compiler") \
2549 \
2550 develop_pd(bool, CICompileOSR, \
2551 "compile on stack replacement methods if supported by the " \
2552 "compiler") \
2553 \
2554 develop(bool, CIPrintMethodCodes, false, \
2555 "print method bytecodes of the compiled code") \
2556 \
2557 develop(bool, CIPrintTypeFlow, false, \
2558 "print the results of ciTypeFlow analysis") \
2559 \
2560 develop(bool, CITraceTypeFlow, false, \
2561 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2562 \
2563 develop(intx, OSROnlyBCI, -1, \
2564 "OSR only at this bci. Negative values mean exclude that bci") \
2565 \
2566 /* compiler */ \
2567 \
2568 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2569 "Number of compiler threads to run") \
2570 \
2571 product(intx, CompilationPolicyChoice, 0, \
2572 "which compilation policy (0/1)") \
2573 \
2574 develop(bool, UseStackBanging, true, \
2575 "use stack banging for stack overflow checks (required for " \
2576 "proper StackOverflow handling; disable only to measure cost " \
2577 "of stackbanging)") \
2578 \
2579 develop(bool, UseStrictFP, true, \
2580 "use strict fp if modifier strictfp is set") \
2581 \
2582 develop(bool, GenerateSynchronizationCode, true, \
2583 "generate locking/unlocking code for synchronized methods and " \
2584 "monitors") \
2585 \
2586 develop(bool, GenerateCompilerNullChecks, true, \
2587 "Generate explicit null checks for loads/stores/calls") \
2588 \
2589 develop(bool, GenerateRangeChecks, true, \
2590 "Generate range checks for array accesses") \
2591 \
2592 develop_pd(bool, ImplicitNullChecks, \
2593 "Generate code for implicit null checks") \
2594 \
2595 product_pd(bool, TrapBasedNullChecks, \
2596 "Generate code for null checks that uses a cmp and trap " \
2597 "instruction raising SIGTRAP. This is only used if an access to" \
2598 "null (+offset) will not raise a SIGSEGV, i.e.," \
2599 "ImplicitNullChecks don't work (PPC64).") \
2600 \
2601 product(bool, PrintSafepointStatistics, false, \
2602 "Print statistics about safepoint synchronization") \
2603 \
2604 product(intx, PrintSafepointStatisticsCount, 300, \
2605 "Total number of safepoint statistics collected " \
2606 "before printing them out") \
2607 \
2608 product(intx, PrintSafepointStatisticsTimeout, -1, \
2609 "Print safepoint statistics only when safepoint takes " \
2610 "more than PrintSafepointSatisticsTimeout in millis") \
2611 \
2612 product(bool, TraceSafepointCleanupTime, false, \
2613 "Print the break down of clean up tasks performed during " \
2614 "safepoint") \
2615 \
2616 product(bool, Inline, true, \
2617 "Enable inlining") \
2618 \
2619 product(bool, ClipInlining, true, \
2620 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \
2621 \
2622 develop(bool, UseCHA, true, \
2623 "Enable CHA") \
2624 \
2625 product(bool, UseTypeProfile, true, \
2626 "Check interpreter profile for historically monomorphic calls") \
2627 \
2628 notproduct(bool, TimeCompiler, false, \
2629 "Time the compiler") \
2630 \
2631 diagnostic(bool, PrintInlining, false, \
2632 "Print inlining optimizations") \
2633 \
2634 product(bool, UsePopCountInstruction, false, \
2635 "Use population count instruction") \
2636 \
2637 develop(bool, EagerInitialization, false, \
2638 "Eagerly initialize classes if possible") \
2639 \
2640 develop(bool, TraceMethodReplacement, false, \
2641 "Print when methods are replaced do to recompilation") \
2642 \
2643 develop(bool, PrintMethodFlushing, false, \
2644 "Print the nmethods being flushed") \
2645 \
2646 diagnostic(bool, PrintMethodFlushingStatistics, false, \
2647 "print statistics about method flushing") \
2648 \
2649 develop(bool, UseRelocIndex, false, \
2650 "Use an index to speed random access to relocations") \
2651 \
2652 develop(bool, StressCodeBuffers, false, \
2653 "Exercise code buffer expansion and other rare state changes") \
2654 \
2655 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2656 "Generate extra debugging information for non-safepoints in " \
2657 "nmethods") \
2658 \
2659 product(bool, PrintVMOptions, false, \
2660 "Print flags that appeared on the command line") \
2661 \
2662 product(bool, IgnoreUnrecognizedVMOptions, false, \
2663 "Ignore unrecognized VM options") \
2664 \
2665 product(bool, PrintCommandLineFlags, false, \
2666 "Print flags specified on command line or set by ergonomics") \
2667 \
2668 product(bool, PrintFlagsInitial, false, \
2669 "Print all VM flags before argument processing and exit VM") \
2670 \
2671 product(bool, PrintFlagsFinal, false, \
2672 "Print all VM flags after argument and ergonomic processing") \
2673 \
2674 notproduct(bool, PrintFlagsWithComments, false, \
2675 "Print all VM flags with default values and descriptions and " \
2676 "exit") \
2677 \
2678 diagnostic(bool, SerializeVMOutput, true, \
2679 "Use a mutex to serialize output to tty and LogFile") \
2680 \
2681 diagnostic(bool, DisplayVMOutput, true, \
2682 "Display all VM output on the tty, independently of LogVMOutput") \
2683 \
2684 diagnostic(bool, LogVMOutput, false, \
2685 "Save VM output to LogFile") \
2686 \
2687 diagnostic(ccstr, LogFile, NULL, \
2688 "If LogVMOutput or LogCompilation is on, save VM output to " \
2689 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
2690 \
2691 product(ccstr, ErrorFile, NULL, \
2692 "If an error occurs, save the error data to this file " \
2693 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2694 \
2695 product(bool, DisplayVMOutputToStderr, false, \
2696 "If DisplayVMOutput is true, display all VM output to stderr") \
2697 \
2698 product(bool, DisplayVMOutputToStdout, false, \
2699 "If DisplayVMOutput is true, display all VM output to stdout") \
2700 \
2701 product(bool, UseHeavyMonitors, false, \
2702 "use heavyweight instead of lightweight Java monitors") \
2703 \
2704 product(bool, PrintStringTableStatistics, false, \
2705 "print statistics about the StringTable and SymbolTable") \
2706 \
2707 diagnostic(bool, VerifyStringTableAtExit, false, \
2708 "verify StringTable contents at exit") \
2709 \
2710 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2711 "print histogram of the symbol table") \
2712 \
2713 notproduct(bool, ExitVMOnVerifyError, false, \
2714 "standard exit from VM if bytecode verify error " \
2715 "(only in debug mode)") \
2716 \
2717 notproduct(ccstr, AbortVMOnException, NULL, \
2718 "Call fatal if this exception is thrown. Example: " \
2719 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2720 \
2721 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \
2722 "Call fatal if the exception pointed by AbortVMOnException " \
2723 "has this message") \
2724 \
2725 develop(bool, DebugVtables, false, \
2726 "add debugging code to vtable dispatch") \
2727 \
2728 develop(bool, PrintVtables, false, \
2729 "print vtables when printing klass") \
2730 \
2731 notproduct(bool, PrintVtableStats, false, \
2732 "print vtables stats at end of run") \
2733 \
2734 develop(bool, TraceCreateZombies, false, \
2735 "trace creation of zombie nmethods") \
2736 \
2737 notproduct(bool, IgnoreLockingAssertions, false, \
2738 "disable locking assertions (for speed)") \
2739 \
2740 product(bool, RangeCheckElimination, true, \
2741 "Eliminate range checks") \
2742 \
2743 develop_pd(bool, UncommonNullCast, \
2744 "track occurrences of null in casts; adjust compiler tactics") \
2745 \
2746 develop(bool, TypeProfileCasts, true, \
2747 "treat casts like calls for purposes of type profiling") \
2748 \
2749 develop(bool, DelayCompilationDuringStartup, true, \
2750 "Delay invoking the compiler until main application class is " \
2751 "loaded") \
2752 \
2753 develop(bool, CompileTheWorld, false, \
2754 "Compile all methods in all classes in bootstrap class path " \
2755 "(stress test)") \
2756 \
2757 develop(bool, CompileTheWorldPreloadClasses, true, \
2758 "Preload all classes used by a class before start loading") \
2759 \
2760 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2761 "Force a safepoint every n compiles so sweeper can keep up") \
2762 \
2763 develop(bool, FillDelaySlots, true, \
2764 "Fill delay slots (on SPARC only)") \
2765 \
2766 develop(bool, TimeLivenessAnalysis, false, \
2767 "Time computation of bytecode liveness analysis") \
2768 \
2769 develop(bool, TraceLivenessGen, false, \
2770 "Trace the generation of liveness analysis information") \
2771 \
2772 notproduct(bool, TraceLivenessQuery, false, \
2773 "Trace queries of liveness analysis information") \
2774 \
2775 notproduct(bool, CollectIndexSetStatistics, false, \
2776 "Collect information about IndexSets") \
2777 \
2778 develop(bool, UseLoopSafepoints, true, \
2779 "Generate Safepoint nodes in every loop") \
2780 \
2781 develop(intx, FastAllocateSizeLimit, 128*K, \
2782 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2783 "Inline allocations larger than this in doublewords must go slow")\
2784 \
2785 product(bool, AggressiveOpts, false, \
2786 "Enable aggressive optimizations - see arguments.cpp") \
2787 \
2788 product_pd(uintx, TypeProfileLevel, \
2789 "=XYZ, with Z: Type profiling of arguments at call; " \
2790 "Y: Type profiling of return value at call; " \
2791 "X: Type profiling of parameters to methods; " \
2792 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \
2793 \
2794 product(intx, TypeProfileArgsLimit, 2, \
2795 "max number of call arguments to consider for type profiling") \
2796 \
2797 product(intx, TypeProfileParmsLimit, 2, \
2798 "max number of incoming parameters to consider for type profiling"\
2799 ", -1 for all") \
2800 \
2801 /* statistics */ \
2802 develop(bool, CountCompiledCalls, false, \
2803 "Count method invocations") \
2804 \
2805 notproduct(bool, CountRuntimeCalls, false, \
2806 "Count VM runtime calls") \
2807 \
2808 develop(bool, CountJNICalls, false, \
2809 "Count jni method invocations") \
2810 \
2811 notproduct(bool, CountJVMCalls, false, \
2812 "Count jvm method invocations") \
2813 \
2814 notproduct(bool, CountRemovableExceptions, false, \
2815 "Count exceptions that could be replaced by branches due to " \
2816 "inlining") \
2817 \
2818 notproduct(bool, ICMissHistogram, false, \
2819 "Produce histogram of IC misses") \
2820 \
2821 notproduct(bool, PrintClassStatistics, false, \
2822 "Print class statistics at end of run") \
2823 \
2824 notproduct(bool, PrintMethodStatistics, false, \
2825 "Print method statistics at end of run") \
2826 \
2827 /* interpreter */ \
2828 develop(bool, ClearInterpreterLocals, false, \
2829 "Always clear local variables of interpreter activations upon " \
2830 "entry") \
2831 \
2832 product_pd(bool, RewriteBytecodes, \
2833 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2834 \
2835 product_pd(bool, RewriteFrequentPairs, \
2836 "Rewrite frequently used bytecode pairs into a single bytecode") \
2837 \
2838 diagnostic(bool, PrintInterpreter, false, \
2839 "Print the generated interpreter code") \
2840 \
2841 product(bool, UseInterpreter, true, \
2842 "Use interpreter for non-compiled methods") \
2843 \
2844 develop(bool, UseFastSignatureHandlers, true, \
2845 "Use fast signature handlers for native calls") \
2846 \
2847 product(bool, UseLoopCounter, true, \
2848 "Increment invocation counter on backward branch") \
2849 \
2850 product(bool, UseFastEmptyMethods, true, \
2851 "Use fast method entry code for empty methods") \
2852 \
2853 product(bool, UseFastAccessorMethods, true, \
2854 "Use fast method entry code for accessor methods") \
2855 \
2856 product_pd(bool, UseOnStackReplacement, \
2857 "Use on stack replacement, calls runtime if invoc. counter " \
2858 "overflows in loop") \
2859 \
2860 notproduct(bool, TraceOnStackReplacement, false, \
2861 "Trace on stack replacement") \
2862 \
2863 product_pd(bool, PreferInterpreterNativeStubs, \
2864 "Use always interpreter stubs for native methods invoked via " \
2865 "interpreter") \
2866 \
2867 develop(bool, CountBytecodes, false, \
2868 "Count number of bytecodes executed") \
2869 \
2870 develop(bool, PrintBytecodeHistogram, false, \
2871 "Print histogram of the executed bytecodes") \
2872 \
2873 develop(bool, PrintBytecodePairHistogram, false, \
2874 "Print histogram of the executed bytecode pairs") \
2875 \
2876 diagnostic(bool, PrintSignatureHandlers, false, \
2877 "Print code generated for native method signature handlers") \
2878 \
2879 develop(bool, VerifyOops, false, \
2880 "Do plausibility checks for oops") \
2881 \
2882 develop(bool, CheckUnhandledOops, false, \
2883 "Check for unhandled oops in VM code") \
2884 \
2885 develop(bool, VerifyJNIFields, trueInDebug, \
2886 "Verify jfieldIDs for instance fields") \
2887 \
2888 notproduct(bool, VerifyJNIEnvThread, false, \
2889 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2890 "from JNI") \
2891 \
2892 develop(bool, VerifyFPU, false, \
2893 "Verify FPU state (check for NaN's, etc.)") \
2894 \
2895 develop(bool, VerifyThread, false, \
2896 "Watch the thread register for corruption (SPARC only)") \
2897 \
2898 develop(bool, VerifyActivationFrameSize, false, \
2899 "Verify that activation frame didn't become smaller than its " \
2900 "minimal size") \
2901 \
2902 develop(bool, TraceFrequencyInlining, false, \
2903 "Trace frequency based inlining") \
2904 \
2905 develop_pd(bool, InlineIntrinsics, \
2906 "Inline intrinsics that can be statically resolved") \
2907 \
2908 product_pd(bool, ProfileInterpreter, \
2909 "Profile at the bytecode level during interpretation") \
2910 \
2911 develop(bool, TraceProfileInterpreter, false, \
2912 "Trace profiling at the bytecode level during interpretation. " \
2913 "This outputs the profiling information collected to improve " \
2914 "jit compilation.") \
2915 \
2916 develop_pd(bool, ProfileTraps, \
2917 "Profile deoptimization traps at the bytecode level") \
2918 \
2919 product(intx, ProfileMaturityPercentage, 20, \
2920 "number of method invocations/branches (expressed as % of " \
2921 "CompileThreshold) before using the method's profile") \
2922 \
2923 develop(bool, PrintMethodData, false, \
2924 "Print the results of +ProfileInterpreter at end of run") \
2925 \
2926 develop(bool, VerifyDataPointer, trueInDebug, \
2927 "Verify the method data pointer during interpreter profiling") \
2928 \
2929 develop(bool, VerifyCompiledCode, false, \
2930 "Include miscellaneous runtime verifications in nmethod code; " \
2931 "default off because it disturbs nmethod size heuristics") \
2932 \
2933 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2934 "Manually make GC thread crash then dump java stack trace; " \
2935 "Test only") \
2936 \
2937 /* compilation */ \
2938 product(bool, UseCompiler, true, \
2939 "Use Just-In-Time compilation") \
2940 \
2941 develop(bool, TraceCompilationPolicy, false, \
2942 "Trace compilation policy") \
2943 \
2944 develop(bool, TimeCompilationPolicy, false, \
2945 "Time the compilation policy") \
2946 \
2947 product(bool, UseCounterDecay, true, \
2948 "Adjust recompilation counters") \
2949 \
2950 develop(intx, CounterHalfLifeTime, 30, \
2951 "Half-life time of invocation counters (in seconds)") \
2952 \
2953 develop(intx, CounterDecayMinIntervalLength, 500, \
2954 "The minimum interval (in milliseconds) between invocation of " \
2955 "CounterDecay") \
2956 \
2957 product(bool, AlwaysCompileLoopMethods, false, \
2958 "When using recompilation, never interpret methods " \
2959 "containing loops") \
2960 \
2961 product(bool, DontCompileHugeMethods, true, \
2962 "Do not compile methods > HugeMethodLimit") \
2963 \
2964 /* Bytecode escape analysis estimation. */ \
2965 product(bool, EstimateArgEscape, true, \
2966 "Analyze bytecodes to estimate escape state of arguments") \
2967 \
2968 product(intx, BCEATraceLevel, 0, \
2969 "How much tracing to do of bytecode escape analysis estimates") \
2970 \
2971 product(intx, MaxBCEAEstimateLevel, 5, \
2972 "Maximum number of nested calls that are analyzed by BC EA") \
2973 \
2974 product(intx, MaxBCEAEstimateSize, 150, \
2975 "Maximum bytecode size of a method to be analyzed by BC EA") \
2976 \
2977 product(intx, AllocatePrefetchStyle, 1, \
2978 "0 = no prefetch, " \
2979 "1 = prefetch instructions for each allocation, " \
2980 "2 = use TLAB watermark to gate allocation prefetch, " \
2981 "3 = use BIS instruction on Sparc for allocation prefetch") \
2982 \
2983 product(intx, AllocatePrefetchDistance, -1, \
2984 "Distance to prefetch ahead of allocation pointer") \
2985 \
2986 product(intx, AllocatePrefetchLines, 3, \
2987 "Number of lines to prefetch ahead of array allocation pointer") \
2988 \
2989 product(intx, AllocateInstancePrefetchLines, 1, \
2990 "Number of lines to prefetch ahead of instance allocation " \
2991 "pointer") \
2992 \
2993 product(intx, AllocatePrefetchStepSize, 16, \
2994 "Step size in bytes of sequential prefetch instructions") \
2995 \
2996 product(intx, AllocatePrefetchInstr, 0, \
2997 "Prefetch instruction to prefetch ahead of allocation pointer") \
2998 \
2999 /* deoptimization */ \
3000 develop(bool, TraceDeoptimization, false, \
3001 "Trace deoptimization") \
3002 \
3003 develop(bool, DebugDeoptimization, false, \
3004 "Tracing various information while debugging deoptimization") \
3005 \
3006 product(intx, SelfDestructTimer, 0, \
3007 "Will cause VM to terminate after a given time (in minutes) " \
3008 "(0 means off)") \
3009 \
3010 product(intx, MaxJavaStackTraceDepth, 1024, \
3011 "The maximum number of lines in the stack trace for Java " \
3012 "exceptions (0 means all)") \
3013 \
3014 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
3015 "Guarantee a safepoint (at least) every so many milliseconds " \
3016 "(0 means none)")) \
3017 \
3018 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \
3019 "Guarantee a safepoint (at least) every so many milliseconds " \
3020 "(0 means none)")) \
3021 \
3022 product(intx, SafepointTimeoutDelay, 10000, \
3023 "Delay in milliseconds for option SafepointTimeout") \
3024 \
3025 product(intx, NmethodSweepFraction, 16, \
3026 "Number of invocations of sweeper to cover all nmethods") \
3027 \
3028 product(intx, NmethodSweepCheckInterval, 5, \
3029 "Compilers wake up every n seconds to possibly sweep nmethods") \
3030 \
3031 product(intx, NmethodSweepActivity, 10, \
3032 "Removes cold nmethods from code cache if > 0. Higher values " \
3033 "result in more aggressive sweeping") \
3034 \
3035 notproduct(bool, LogSweeper, false, \
3036 "Keep a ring buffer of sweeper activity") \
3037 \
3038 notproduct(intx, SweeperLogEntries, 1024, \
3039 "Number of records in the ring buffer of sweeper activity") \
3040 \
3041 notproduct(intx, MemProfilingInterval, 500, \
3042 "Time between each invocation of the MemProfiler") \
3043 \
3044 develop(intx, MallocCatchPtr, -1, \
3045 "Hit breakpoint when mallocing/freeing this pointer") \
3046 \
3047 notproduct(intx, AssertRepeat, 1, \
3048 "number of times to evaluate expression in assert " \
3049 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
3050 \
3051 notproduct(ccstrlist, SuppressErrorAt, "", \
3052 "List of assertions (file:line) to muzzle") \
3053 \
3054 notproduct(uintx, HandleAllocationLimit, 1024, \
3055 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
3056 "is used") \
3057 \
3058 develop(uintx, TotalHandleAllocationLimit, 1024, \
3059 "Threshold for total handle allocation when " \
3060 "+TraceHandleAllocation is used") \
3061 \
3062 develop(intx, StackPrintLimit, 100, \
3063 "number of stack frames to print in VM-level stack dump") \
3064 \
3065 notproduct(intx, MaxElementPrintSize, 256, \
3066 "maximum number of elements to print") \
3067 \
3068 notproduct(intx, MaxSubklassPrintSize, 4, \
3069 "maximum number of subklasses to print when printing klass") \
3070 \
3071 product(intx, MaxInlineLevel, 9, \
3072 "maximum number of nested calls that are inlined") \
3073 \
3074 product(intx, MaxRecursiveInlineLevel, 1, \
3075 "maximum number of nested recursive calls that are inlined") \
3076 \
3077 develop(intx, MaxForceInlineLevel, 100, \
3078 "maximum number of nested calls that are forced for inlining " \
3079 "(using CompilerOracle or marked w/ @ForceInline)") \
3080 \
3081 product_pd(intx, InlineSmallCode, \
3082 "Only inline already compiled methods if their code size is " \
3083 "less than this") \
3084 \
3085 product(intx, MaxInlineSize, 35, \
3086 "The maximum bytecode size of a method to be inlined") \
3087 \
3088 product_pd(intx, FreqInlineSize, \
3089 "The maximum bytecode size of a frequent method to be inlined") \
3090 \
3091 product(intx, MaxTrivialSize, 6, \
3092 "The maximum bytecode size of a trivial method to be inlined") \
3093 \
3094 product(intx, MinInliningThreshold, 250, \
3095 "The minimum invocation count a method needs to have to be " \
3096 "inlined") \
3097 \
3098 develop(intx, MethodHistogramCutoff, 100, \
3099 "The cutoff value for method invocation histogram (+CountCalls)") \
3100 \
3101 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
3102 "Number of interpreted methods to show in profile") \
3103 \
3104 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
3105 "Number of compiled methods to show in profile") \
3106 \
3107 develop(intx, ProfilerNumberOfStubMethods, 25, \
3108 "Number of stub methods to show in profile") \
3109 \
3110 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
3111 "Number of runtime stub nodes to show in profile") \
3112 \
3113 product(intx, ProfileIntervalsTicks, 100, \
3114 "Number of ticks between printing of interval profile " \
3115 "(+ProfileIntervals)") \
3116 \
3117 notproduct(intx, ScavengeALotInterval, 1, \
3118 "Interval between which scavenge will occur with +ScavengeALot") \
3119 \
3120 notproduct(intx, FullGCALotInterval, 1, \
3121 "Interval between which full gc will occur with +FullGCALot") \
3122 \
3123 notproduct(intx, FullGCALotStart, 0, \
3124 "For which invocation to start FullGCAlot") \
3125 \
3126 notproduct(intx, FullGCALotDummies, 32*K, \
3127 "Dummy object allocated with +FullGCALot, forcing all objects " \
3128 "to move") \
3129 \
3130 develop(intx, DontYieldALotInterval, 10, \
3131 "Interval between which yields will be dropped (milliseconds)") \
3132 \
3133 develop(intx, MinSleepInterval, 1, \
3134 "Minimum sleep() interval (milliseconds) when " \
3135 "ConvertSleepToYield is off (used for Solaris)") \
3136 \
3137 develop(intx, ProfilerPCTickThreshold, 15, \
3138 "Number of ticks in a PC buckets to be a hotspot") \
3139 \
3140 notproduct(intx, DeoptimizeALotInterval, 5, \
3141 "Number of exits until DeoptimizeALot kicks in") \
3142 \
3143 notproduct(intx, ZombieALotInterval, 5, \
3144 "Number of exits until ZombieALot kicks in") \
3145 \
3146 diagnostic(intx, MallocVerifyInterval, 0, \
3147 "If non-zero, verify C heap after every N calls to " \
3148 "malloc/realloc/free") \
3149 \
3150 diagnostic(intx, MallocVerifyStart, 0, \
3151 "If non-zero, start verifying C heap after Nth call to " \
3152 "malloc/realloc/free") \
3153 \
3154 diagnostic(uintx, MallocMaxTestWords, 0, \
3155 "If non-zero, maximum number of words that malloc/realloc can " \
3156 "allocate (for testing only)") \
3157 \
3158 product(intx, TypeProfileWidth, 2, \
3159 "Number of receiver types to record in call/cast profile") \
3160 \
3161 develop(intx, BciProfileWidth, 2, \
3162 "Number of return bci's to record in ret profile") \
3163 \
3164 product(intx, PerMethodRecompilationCutoff, 400, \
3165 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3166 \
3167 product(intx, PerBytecodeRecompilationCutoff, 200, \
3168 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
3169 \
3170 product(intx, PerMethodTrapLimit, 100, \
3171 "Limit on traps (of one kind) in a method (includes inlines)") \
3172 \
3173 experimental(intx, PerMethodSpecTrapLimit, 5000, \
3174 "Limit on speculative traps (of one kind) in a method (includes inlines)") \
3175 \
3176 product(intx, PerBytecodeTrapLimit, 4, \
3177 "Limit on traps (of one kind) at a particular BCI") \
3178 \
3179 experimental(intx, SpecTrapLimitExtraEntries, 3, \
3180 "Extra method data trap entries for speculation") \
3181 \
3182 develop(intx, InlineFrequencyRatio, 20, \
3183 "Ratio of call site execution to caller method invocation") \
3184 \
3185 develop_pd(intx, InlineFrequencyCount, \
3186 "Count of call site execution necessary to trigger frequent " \
3187 "inlining") \
3188 \
3189 develop(intx, InlineThrowCount, 50, \
3190 "Force inlining of interpreted methods that throw this often") \
3191 \
3192 develop(intx, InlineThrowMaxSize, 200, \
3193 "Force inlining of throwing methods smaller than this") \
3194 \
3195 develop(intx, ProfilerNodeSize, 1024, \
3196 "Size in K to allocate for the Profile Nodes of each thread") \
3197 \
3198 product_pd(intx, PreInflateSpin, \
3199 "Number of times to spin wait before inflation") \
3200 \
3201 /* gc parameters */ \
3202 product(uintx, InitialHeapSize, 0, \
3203 "Initial heap size (in bytes); zero means use ergonomics") \
3204 \
3205 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \
3206 "Maximum heap size (in bytes)") \
3207 \
3208 product(uintx, OldSize, ScaleForWordSize(4*M), \
3209 "Initial tenured generation size (in bytes)") \
3210 \
3211 product(uintx, NewSize, ScaleForWordSize(1*M), \
3212 "Initial new generation size (in bytes)") \
3213 \
3214 product(uintx, MaxNewSize, max_uintx, \
3215 "Maximum new generation size (in bytes), max_uintx means set " \
3216 "ergonomically") \
3217 \
3218 product(uintx, PretenureSizeThreshold, 0, \
3219 "Maximum size in bytes of objects allocated in DefNew " \
3220 "generation; zero means no maximum") \
3221 \
3222 product(uintx, TLABSize, 0, \
3223 "Starting TLAB size (in bytes); zero means set ergonomically") \
3224 \
3225 product(uintx, MinTLABSize, 2*K, \
3226 "Minimum allowed TLAB size (in bytes)") \
3227 \
3228 product(uintx, TLABAllocationWeight, 35, \
3229 "Allocation averaging weight") \
3230 \
3231 product(uintx, TLABWasteTargetPercent, 1, \
3232 "Percentage of Eden that can be wasted") \
3233 \
3234 product(uintx, TLABRefillWasteFraction, 64, \
3235 "Maximum TLAB waste at a refill (internal fragmentation)") \
3236 \
3237 product(uintx, TLABWasteIncrement, 4, \
3238 "Increment allowed waste at slow allocation") \
3239 \
3240 product(uintx, SurvivorRatio, 8, \
3241 "Ratio of eden/survivor space size") \
3242 \
3243 product(uintx, NewRatio, 2, \
3244 "Ratio of old/new generation sizes") \
3245 \
3246 product_pd(uintx, NewSizeThreadIncrease, \
3247 "Additional size added to desired new generation size per " \
3248 "non-daemon thread (in bytes)") \
3249 \
3250 product_pd(uintx, MetaspaceSize, \
3251 "Initial size of Metaspaces (in bytes)") \
3252 \
3253 product(uintx, MaxMetaspaceSize, max_uintx, \
3254 "Maximum size of Metaspaces (in bytes)") \
3255 \
3256 product(uintx, CompressedClassSpaceSize, 1*G, \
3257 "Maximum size of class area in Metaspace when compressed " \
3258 "class pointers are used") \
3259 \
3260 manageable(uintx, MinHeapFreeRatio, 40, \
3261 "The minimum percentage of heap free after GC to avoid expansion."\
3262 " For most GCs this applies to the old generation. In G1 and" \
3263 " ParallelGC it applies to the whole heap.") \
3264 \
3265 manageable(uintx, MaxHeapFreeRatio, 70, \
3266 "The maximum percentage of heap free after GC to avoid shrinking."\
3267 " For most GCs this applies to the old generation. In G1 and" \
3268 " ParallelGC it applies to the whole heap.") \
3269 \
3270 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
3271 "Number of milliseconds per MB of free space in the heap") \
3272 \
3273 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
3274 "The minimum change in heap space due to GC (in bytes)") \
3275 \
3276 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \
3277 "The minimum expansion of Metaspace (in bytes)") \
3278 \
3279 product(uintx, MinMetaspaceFreeRatio, 40, \
3280 "The minimum percentage of Metaspace free after GC to avoid " \
3281 "expansion") \
3282 \
3283 product(uintx, MaxMetaspaceFreeRatio, 70, \
3284 "The maximum percentage of Metaspace free after GC to avoid " \
3285 "shrinking") \
3286 \
3287 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \
3288 "The maximum expansion of Metaspace without full GC (in bytes)") \
3289 \
3290 product(uintx, QueuedAllocationWarningCount, 0, \
3291 "Number of times an allocation that queues behind a GC " \
3292 "will retry before printing a warning") \
3293 \
3294 diagnostic(uintx, VerifyGCStartAt, 0, \
3295 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3296 \
3297 diagnostic(intx, VerifyGCLevel, 0, \
3298 "Generation level at which to start +VerifyBefore/AfterGC") \
3299 \
3300 product(uintx, MaxTenuringThreshold, 15, \
3301 "Maximum value for tenuring threshold") \
3302 \
3303 product(uintx, InitialTenuringThreshold, 7, \
3304 "Initial value for tenuring threshold") \
3305 \
3306 product(uintx, TargetSurvivorRatio, 50, \
3307 "Desired percentage of survivor space used after scavenge") \
3308 \
3309 product(uintx, MarkSweepDeadRatio, 5, \
3310 "Percentage (0-100) of the old gen allowed as dead wood. " \
3311 "Serial mark sweep treats this as both the minimum and maximum " \
3312 "value. " \
3313 "CMS uses this value only if it falls back to mark sweep. " \
3314 "Par compact uses a variable scale based on the density of the " \
3315 "generation and treats this as the maximum value when the heap " \
3316 "is either completely full or completely empty. Par compact " \
3317 "also has a smaller default value; see arguments.cpp.") \
3318 \
3319 product(uintx, MarkSweepAlwaysCompactCount, 4, \
3320 "How often should we fully compact the heap (ignoring the dead " \
3321 "space parameters)") \
3322 \
3323 product(intx, PrintCMSStatistics, 0, \
3324 "Statistics for CMS") \
3325 \
3326 product(bool, PrintCMSInitiationStatistics, false, \
3327 "Statistics for initiating a CMS collection") \
3328 \
3329 product(intx, PrintFLSStatistics, 0, \
3330 "Statistics for CMS' FreeListSpace") \
3331 \
3332 product(intx, PrintFLSCensus, 0, \
3333 "Census for CMS' FreeListSpace") \
3334 \
3335 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3336 "Delay between expansion and allocation (in milliseconds)") \
3337 \
3338 develop(uintx, GCWorkerDelayMillis, 0, \
3339 "Delay in scheduling GC workers (in milliseconds)") \
3340 \
3341 product(intx, DeferThrSuspendLoopCount, 4000, \
3342 "(Unstable) Number of times to iterate in safepoint loop " \
3343 "before blocking VM threads ") \
3344 \
3345 product(intx, DeferPollingPageLoopCount, -1, \
3346 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3347 "before changing safepoint polling page to RO ") \
3348 \
3349 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3350 \
3351 product(bool, PSChunkLargeArrays, true, \
3352 "Process large arrays in chunks") \
3353 \
3354 product(uintx, GCDrainStackTargetSize, 64, \
3355 "Number of entries we will try to leave on the stack " \
3356 "during parallel gc") \
3357 \
3358 /* stack parameters */ \
3359 product_pd(intx, StackYellowPages, \
3360 "Number of yellow zone (recoverable overflows) pages") \
3361 \
3362 product_pd(intx, StackRedPages, \
3363 "Number of red zone (unrecoverable overflows) pages") \
3364 \
3365 product_pd(intx, StackShadowPages, \
3366 "Number of shadow zone (for overflow checking) pages " \
3367 "this should exceed the depth of the VM and native call stack") \
3368 \
3369 product_pd(intx, ThreadStackSize, \
3370 "Thread Stack Size (in Kbytes)") \
3371 \
3372 product_pd(intx, VMThreadStackSize, \
3373 "Non-Java Thread Stack Size (in Kbytes)") \
3374 \
3375 product_pd(intx, CompilerThreadStackSize, \
3376 "Compiler Thread Stack Size (in Kbytes)") \
3377 \
3378 develop_pd(uintx, JVMInvokeMethodSlack, \
3379 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3380 \
3381 product(uintx, ThreadSafetyMargin, 50*M, \
3382 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
3383 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
3384 "disable this feature") \
3385 \
3386 /* code cache parameters */ \
3387 /* ppc64 has large code-entry alignment. */ \
3388 develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64), \
3389 "Code cache segment size (in bytes) - smallest unit of " \
3390 "allocation") \
3391 \
3392 develop_pd(intx, CodeEntryAlignment, \
3393 "Code entry alignment for generated code (in bytes)") \
3394 \
3395 product_pd(intx, OptoLoopAlignment, \
3396 "Align inner loops to zero relative to this modulus") \
3397 \
3398 product_pd(uintx, InitialCodeCacheSize, \
3399 "Initial code cache size (in bytes)") \
3400 \
3401 develop_pd(uintx, CodeCacheMinimumUseSpace, \
3402 "Minimum code cache size (in bytes) required to start VM.") \
3403 \
3404 product_pd(uintx, ReservedCodeCacheSize, \
3405 "Reserved code cache size (in bytes) - maximum code cache size") \
3406 \
3407 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
3408 "When less than X space left, we stop compiling") \
3409 \
3410 product_pd(uintx, CodeCacheExpansionSize, \
3411 "Code cache expansion size (in bytes)") \
3412 \
3413 develop_pd(uintx, CodeCacheMinBlockLength, \
3414 "Minimum number of segments in a code cache block") \
3415 \
3416 notproduct(bool, ExitOnFullCodeCache, false, \
3417 "Exit the VM if we fill the code cache") \
3418 \
3419 product(bool, UseCodeCacheFlushing, true, \
3420 "Remove cold/old nmethods from the code cache") \
3421 \
3422 /* interpreter debugging */ \
3423 develop(intx, BinarySwitchThreshold, 5, \
3424 "Minimal number of lookupswitch entries for rewriting to binary " \
3425 "switch") \
3426 \
3427 develop(intx, StopInterpreterAt, 0, \
3428 "Stop interpreter execution at specified bytecode number") \
3429 \
3430 develop(intx, TraceBytecodesAt, 0, \
3431 "Trace bytecodes starting with specified bytecode number") \
3432 \
3433 /* compiler interface */ \
3434 develop(intx, CIStart, 0, \
3435 "The id of the first compilation to permit") \
3436 \
3437 develop(intx, CIStop, max_jint, \
3438 "The id of the last compilation to permit") \
3439 \
3440 develop(intx, CIStartOSR, 0, \
3441 "The id of the first osr compilation to permit " \
3442 "(CICountOSR must be on)") \
3443 \
3444 develop(intx, CIStopOSR, max_jint, \
3445 "The id of the last osr compilation to permit " \
3446 "(CICountOSR must be on)") \
3447 \
3448 develop(intx, CIBreakAtOSR, -1, \
3449 "The id of osr compilation to break at") \
3450 \
3451 develop(intx, CIBreakAt, -1, \
3452 "The id of compilation to break at") \
3453 \
3454 product(ccstrlist, CompileOnly, "", \
3455 "List of methods (pkg/class.name) to restrict compilation to") \
3456 \
3457 product(ccstr, CompileCommandFile, NULL, \
3458 "Read compiler commands from this file [.hotspot_compiler]") \
3459 \
3460 product(ccstrlist, CompileCommand, "", \
3461 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3462 \
3463 develop(bool, ReplayCompiles, false, \
3464 "Enable replay of compilations from ReplayDataFile") \
3465 \
3466 product(ccstr, ReplayDataFile, NULL, \
3467 "File containing compilation replay information" \
3468 "[default: ./replay_pid%p.log] (%p replaced with pid)") \
3469 \
3470 product(ccstr, InlineDataFile, NULL, \
3471 "File containing inlining replay information" \
3472 "[default: ./inline_pid%p.log] (%p replaced with pid)") \
3473 \
3474 develop(intx, ReplaySuppressInitializers, 2, \
3475 "Control handling of class initialization during replay: " \
3476 "0 - don't do anything special; " \
3477 "1 - treat all class initializers as empty; " \
3478 "2 - treat class initializers for application classes as empty; " \
3479 "3 - allow all class initializers to run during bootstrap but " \
3480 " pretend they are empty after starting replay") \
3481 \
3482 develop(bool, ReplayIgnoreInitErrors, false, \
3483 "Ignore exceptions thrown during initialization for replay") \
3484 \
3485 product(bool, DumpReplayDataOnError, true, \
3486 "Record replay data for crashing compiler threads") \
3487 \
3488 product(bool, CICompilerCountPerCPU, false, \
3489 "1 compiler thread for log(N CPUs)") \
3490 \
3491 develop(intx, CIFireOOMAt, -1, \
3492 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3493 "(non-negative value throws OOM after this many CI accesses " \
3494 "in each compile)") \
3495 notproduct(intx, CICrashAt, -1, \
3496 "id of compilation to trigger assert in compiler thread for " \
3497 "the purpose of testing, e.g. generation of replay data") \
3498 notproduct(bool, CIObjectFactoryVerify, false, \
3499 "enable potentially expensive verification in ciObjectFactory") \
3500 \
3501 /* Priorities */ \
3502 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3503 \
3504 product(intx, ThreadPriorityPolicy, 0, \
3505 "0 : Normal. "\
3506 " VM chooses priorities that are appropriate for normal "\
3507 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3508 " to normal native priority. Java priorities below " \
3509 " NORM_PRIORITY map to lower native priority values. On "\
3510 " Windows applications are allowed to use higher native "\
3511 " priorities. However, with ThreadPriorityPolicy=0, VM will "\
3512 " not use the highest possible native priority, "\
3513 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\
3514 " system threads. On Linux thread priorities are ignored "\
3515 " because the OS does not support static priority in "\
3516 " SCHED_OTHER scheduling class which is the only choice for "\
3517 " non-root, non-realtime applications. "\
3518 "1 : Aggressive. "\
3519 " Java thread priorities map over to the entire range of "\
3520 " native thread priorities. Higher Java thread priorities map "\
3521 " to higher native thread priorities. This policy should be "\
3522 " used with care, as sometimes it can cause performance "\
3523 " degradation in the application and/or the entire system. On "\
3524 " Linux this policy requires root privilege.") \
3525 \
3526 product(bool, ThreadPriorityVerbose, false, \
3527 "Print priority changes") \
3528 \
3529 product(intx, DefaultThreadPriority, -1, \
3530 "The native priority at which threads run if not elsewhere " \
3531 "specified (-1 means no change)") \
3532 \
3533 product(intx, CompilerThreadPriority, -1, \
3534 "The native priority at which compiler threads should run " \
3535 "(-1 means no change)") \
3536 \
3537 product(intx, VMThreadPriority, -1, \
3538 "The native priority at which the VM thread should run " \
3539 "(-1 means no change)") \
3540 \
3541 product(bool, CompilerThreadHintNoPreempt, true, \
3542 "(Solaris only) Give compiler threads an extra quanta") \
3543 \
3544 product(bool, VMThreadHintNoPreempt, false, \
3545 "(Solaris only) Give VM thread an extra quanta") \
3546 \
3547 product(intx, JavaPriority1_To_OSPriority, -1, \
3548 "Map Java priorities to OS priorities") \
3549 \
3550 product(intx, JavaPriority2_To_OSPriority, -1, \
3551 "Map Java priorities to OS priorities") \
3552 \
3553 product(intx, JavaPriority3_To_OSPriority, -1, \
3554 "Map Java priorities to OS priorities") \
3555 \
3556 product(intx, JavaPriority4_To_OSPriority, -1, \
3557 "Map Java priorities to OS priorities") \
3558 \
3559 product(intx, JavaPriority5_To_OSPriority, -1, \
3560 "Map Java priorities to OS priorities") \
3561 \
3562 product(intx, JavaPriority6_To_OSPriority, -1, \
3563 "Map Java priorities to OS priorities") \
3564 \
3565 product(intx, JavaPriority7_To_OSPriority, -1, \
3566 "Map Java priorities to OS priorities") \
3567 \
3568 product(intx, JavaPriority8_To_OSPriority, -1, \
3569 "Map Java priorities to OS priorities") \
3570 \
3571 product(intx, JavaPriority9_To_OSPriority, -1, \
3572 "Map Java priorities to OS priorities") \
3573 \
3574 product(intx, JavaPriority10_To_OSPriority,-1, \
3575 "Map Java priorities to OS priorities") \
3576 \
3577 experimental(bool, UseCriticalJavaThreadPriority, false, \
3578 "Java thread priority 10 maps to critical scheduling priority") \
3579 \
3580 experimental(bool, UseCriticalCompilerThreadPriority, false, \
3581 "Compiler thread(s) run at critical scheduling priority") \
3582 \
3583 experimental(bool, UseCriticalCMSThreadPriority, false, \
3584 "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3585 \
3586 /* compiler debugging */ \
3587 notproduct(intx, CompileTheWorldStartAt, 1, \
3588 "First class to consider when using +CompileTheWorld") \
3589 \
3590 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3591 "Last class to consider when using +CompileTheWorld") \
3592 \
3593 develop(intx, NewCodeParameter, 0, \
3594 "Testing Only: Create a dedicated integer parameter before " \
3595 "putback") \
3596 \
3597 /* new oopmap storage allocation */ \
3598 develop(intx, MinOopMapAllocation, 8, \
3599 "Minimum number of OopMap entries in an OopMapSet") \
3600 \
3601 /* Background Compilation */ \
3602 develop(intx, LongCompileThreshold, 50, \
3603 "Used with +TraceLongCompiles") \
3604 \
3605 product(intx, StarvationMonitorInterval, 200, \
3606 "Pause between each check (in milliseconds)") \
3607 \
3608 /* recompilation */ \
3609 product_pd(intx, CompileThreshold, \
3610 "number of interpreted method invocations before (re-)compiling") \
3611 \
3612 product_pd(intx, BackEdgeThreshold, \
3613 "Interpreter Back edge threshold at which an OSR compilation is " \
3614 "invoked") \
3615 \
3616 product(intx, Tier0InvokeNotifyFreqLog, 7, \
3617 "Interpreter (tier 0) invocation notification frequency") \
3618 \
3619 product(intx, Tier2InvokeNotifyFreqLog, 11, \
3620 "C1 without MDO (tier 2) invocation notification frequency") \
3621 \
3622 product(intx, Tier3InvokeNotifyFreqLog, 10, \
3623 "C1 with MDO profiling (tier 3) invocation notification " \
3624 "frequency") \
3625 \
3626 product(intx, Tier23InlineeNotifyFreqLog, 20, \
3627 "Inlinee invocation (tiers 2 and 3) notification frequency") \
3628 \
3629 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
3630 "Interpreter (tier 0) invocation notification frequency") \
3631 \
3632 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
3633 "C1 without MDO (tier 2) invocation notification frequency") \
3634 \
3635 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
3636 "C1 with MDO profiling (tier 3) invocation notification " \
3637 "frequency") \
3638 \
3639 product(intx, Tier2CompileThreshold, 0, \
3640 "threshold at which tier 2 compilation is invoked") \
3641 \
3642 product(intx, Tier2BackEdgeThreshold, 0, \
3643 "Back edge threshold at which tier 2 compilation is invoked") \
3644 \
3645 product(intx, Tier3InvocationThreshold, 200, \
3646 "Compile if number of method invocations crosses this " \
3647 "threshold") \
3648 \
3649 product(intx, Tier3MinInvocationThreshold, 100, \
3650 "Minimum invocation to compile at tier 3") \
3651 \
3652 product(intx, Tier3CompileThreshold, 2000, \
3653 "Threshold at which tier 3 compilation is invoked (invocation " \
3654 "minimum must be satisfied") \
3655 \
3656 product(intx, Tier3BackEdgeThreshold, 60000, \
3657 "Back edge threshold at which tier 3 OSR compilation is invoked") \
3658 \
3659 product(intx, Tier4InvocationThreshold, 5000, \
3660 "Compile if number of method invocations crosses this " \
3661 "threshold") \
3662 \
3663 product(intx, Tier4MinInvocationThreshold, 600, \
3664 "Minimum invocation to compile at tier 4") \
3665 \
3666 product(intx, Tier4CompileThreshold, 15000, \
3667 "Threshold at which tier 4 compilation is invoked (invocation " \
3668 "minimum must be satisfied") \
3669 \
3670 product(intx, Tier4BackEdgeThreshold, 40000, \
3671 "Back edge threshold at which tier 4 OSR compilation is invoked") \
3672 \
3673 product(intx, Tier3DelayOn, 5, \
3674 "If C2 queue size grows over this amount per compiler thread " \
3675 "stop compiling at tier 3 and start compiling at tier 2") \
3676 \
3677 product(intx, Tier3DelayOff, 2, \
3678 "If C2 queue size is less than this amount per compiler thread " \
3679 "allow methods compiled at tier 2 transition to tier 3") \
3680 \
3681 product(intx, Tier3LoadFeedback, 5, \
3682 "Tier 3 thresholds will increase twofold when C1 queue size " \
3683 "reaches this amount per compiler thread") \
3684 \
3685 product(intx, Tier4LoadFeedback, 3, \
3686 "Tier 4 thresholds will increase twofold when C2 queue size " \
3687 "reaches this amount per compiler thread") \
3688 \
3689 product(intx, TieredCompileTaskTimeout, 50, \
3690 "Kill compile task if method was not used within " \
3691 "given timeout in milliseconds") \
3692 \
3693 product(intx, TieredStopAtLevel, 4, \
3694 "Stop at given compilation level") \
3695 \
3696 product(intx, Tier0ProfilingStartPercentage, 200, \
3697 "Start profiling in interpreter if the counters exceed tier 3 " \
3698 "thresholds by the specified percentage") \
3699 \
3700 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \
3701 "Increase the compile threshold for C1 compilation if the code " \
3702 "cache is filled by the specified percentage") \
3703 \
3704 product(intx, TieredRateUpdateMinTime, 1, \
3705 "Minimum rate sampling interval (in milliseconds)") \
3706 \
3707 product(intx, TieredRateUpdateMaxTime, 25, \
3708 "Maximum rate sampling interval (in milliseconds)") \
3709 \
3710 product_pd(bool, TieredCompilation, \
3711 "Enable tiered compilation") \
3712 \
3713 product(bool, PrintTieredEvents, false, \
3714 "Print tiered events notifications") \
3715 \
3716 product_pd(intx, OnStackReplacePercentage, \
3717 "NON_TIERED number of method invocations/branches (expressed as " \
3718 "% of CompileThreshold) before (re-)compiling OSR code") \
3719 \
3720 product(intx, InterpreterProfilePercentage, 33, \
3721 "NON_TIERED number of method invocations/branches (expressed as " \
3722 "% of CompileThreshold) before profiling in the interpreter") \
3723 \
3724 develop(intx, MaxRecompilationSearchLength, 10, \
3725 "The maximum number of frames to inspect when searching for " \
3726 "recompilee") \
3727 \
3728 develop(intx, MaxInterpretedSearchLength, 3, \
3729 "The maximum number of interpreted frames to skip when searching "\
3730 "for recompilee") \
3731 \
3732 develop(intx, DesiredMethodLimit, 8000, \
3733 "The desired maximum method size (in bytecodes) after inlining") \
3734 \
3735 develop(intx, HugeMethodLimit, 8000, \
3736 "Don't compile methods larger than this if " \
3737 "+DontCompileHugeMethods") \
3738 \
3739 /* New JDK 1.4 reflection implementation */ \
3740 \
3741 develop(bool, UseNewReflection, true, \
3742 "Temporary flag for transition to reflection based on dynamic " \
3743 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3744 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3745 "changes were needed") \
3746 \
3747 develop(bool, VerifyReflectionBytecodes, false, \
3748 "Force verification of 1.4 reflection bytecodes. Does not work " \
3749 "in situations like that described in 4486457 or for " \
3750 "constructors generated for serialization, so can not be enabled "\
3751 "in product.") \
3752 \
3753 product(bool, ReflectionWrapResolutionErrors, true, \
3754 "Temporary flag for transition to AbstractMethodError wrapped " \
3755 "in InvocationTargetException. See 6531596") \
3756 \
3757 develop(intx, FastSuperclassLimit, 8, \
3758 "Depth of hardwired instanceof accelerator array") \
3759 \
3760 /* Properties for Java libraries */ \
3761 \
3762 product(uintx, MaxDirectMemorySize, 0, \
3763 "Maximum total size of NIO direct-buffer allocations") \
3764 \
3765 /* temporary developer defined flags */ \
3766 \
3767 diagnostic(bool, UseNewCode, false, \
3768 "Testing Only: Use the new version while testing") \
3769 \
3770 diagnostic(bool, UseNewCode2, false, \
3771 "Testing Only: Use the new version while testing") \
3772 \
3773 diagnostic(bool, UseNewCode3, false, \
3774 "Testing Only: Use the new version while testing") \
3775 \
3776 /* flags for performance data collection */ \
3777 \
3778 product(bool, UsePerfData, falseInEmbedded, \
3779 "Flag to disable jvmstat instrumentation for performance testing "\
3780 "and problem isolation purposes") \
3781 \
3782 product(bool, PerfDataSaveToFile, false, \
3783 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3784 \
3785 product(ccstr, PerfDataSaveFile, NULL, \
3786 "Save PerfData memory to the specified absolute pathname. " \
3787 "The string %p in the file name (if present) " \
3788 "will be replaced by pid") \
3789 \
3790 product(intx, PerfDataSamplingInterval, 50, \
3791 "Data sampling interval (in milliseconds)") \
3792 \
3793 develop(bool, PerfTraceDataCreation, false, \
3794 "Trace creation of Performance Data Entries") \
3795 \
3796 develop(bool, PerfTraceMemOps, false, \
3797 "Trace PerfMemory create/attach/detach calls") \
3798 \
3799 product(bool, PerfDisableSharedMem, false, \
3800 "Store performance data in standard memory") \
3801 \
3802 product(intx, PerfDataMemorySize, 32*K, \
3803 "Size of performance data memory region. Will be rounded " \
3804 "up to a multiple of the native os page size.") \
3805 \
3806 product(intx, PerfMaxStringConstLength, 1024, \
3807 "Maximum PerfStringConstant string length before truncation") \
3808 \
3809 product(bool, PerfAllowAtExitRegistration, false, \
3810 "Allow registration of atexit() methods") \
3811 \
3812 product(bool, PerfBypassFileSystemCheck, false, \
3813 "Bypass Win32 file system criteria checks (Windows Only)") \
3814 \
3815 product(intx, UnguardOnExecutionViolation, 0, \
3816 "Unguard page and retry on no-execute fault (Win32 only) " \
3817 "0=off, 1=conservative, 2=aggressive") \
3818 \
3819 /* Serviceability Support */ \
3820 \
3821 product(bool, ManagementServer, false, \
3822 "Create JMX Management Server") \
3823 \
3824 product(bool, DisableAttachMechanism, false, \
3825 "Disable mechanism that allows tools to attach to this VM") \
3826 \
3827 product(bool, StartAttachListener, false, \
3828 "Always start Attach Listener at VM startup") \
3829 \
3830 manageable(bool, PrintConcurrentLocks, false, \
3831 "Print java.util.concurrent locks in thread dump") \
3832 \
3833 product(bool, TransmitErrorReport, false, \
3834 "Enable error report transmission on erroneous termination") \
3835 \
3836 product(ccstr, ErrorReportServer, NULL, \
3837 "Override built-in error report server address") \
3838 \
3839 /* Shared spaces */ \
3840 \
3841 product(bool, UseSharedSpaces, true, \
3842 "Use shared spaces for metadata") \
3843 \
3844 product(bool, VerifySharedSpaces, false, \
3845 "Verify shared spaces (false for default archive, true for " \
3846 "archive specified by -XX:SharedArchiveFile)") \
3847 \
3848 product(bool, RequireSharedSpaces, false, \
3849 "Require shared spaces for metadata") \
3850 \
3851 product(bool, DumpSharedSpaces, false, \
3852 "Special mode: JVM reads a class list, loads classes, builds " \
3853 "shared spaces, and dumps the shared spaces to a file to be " \
3854 "used in future JVM runs") \
3855 \
3856 product(bool, PrintSharedSpaces, false, \
3857 "Print usage of shared spaces") \
3858 \
3859 product(bool, PrintSharedArchiveAndExit, false, \
3860 "Print shared archive file contents") \
3861 \
3862 product(bool, PrintSharedDictionary, false, \
3863 "If PrintSharedArchiveAndExit is true, also print the shared " \
3864 "dictionary") \
3865 \
3866 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3867 "Size of read-write space for metadata (in bytes)") \
3868 \
3869 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3870 "Size of read-only space for metadata (in bytes)") \
3871 \
3872 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \
3873 "Size of the shared miscellaneous data area (in bytes)") \
3874 \
3875 product(uintx, SharedMiscCodeSize, 120*K, \
3876 "Size of the shared miscellaneous code area (in bytes)") \
3877 \
3878 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \
3879 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \
3880 "Address to allocate shared memory region for class data") \
3881 \
3882 diagnostic(bool, EnableInvokeDynamic, true, \
3883 "support JSR 292 (method handles, invokedynamic, " \
3884 "anonymous classes") \
3885 \
3886 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \
3887 "Do not quit -Xshare:dump even if we encounter unverifiable " \
3888 "classes. Just exclude them from the shared dictionary.") \
3889 \
3890 diagnostic(bool, PrintMethodHandleStubs, false, \
3891 "Print generated stub code for method handles") \
3892 \
3893 develop(bool, TraceMethodHandles, false, \
3894 "trace internal method handle operations") \
3895 \
3896 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
3897 "perform extra checks when constructing method handles") \
3898 \
3899 diagnostic(bool, ShowHiddenFrames, false, \
3900 "show method handle implementation frames (usually hidden)") \
3901 \
3902 experimental(bool, TrustFinalNonStaticFields, false, \
3903 "trust final non-static declarations for constant folding") \
3904 \
3905 diagnostic(bool, FoldStableValues, true, \
3906 "Optimize loads from stable fields (marked w/ @Stable)") \
3907 \
3908 develop(bool, TraceInvokeDynamic, false, \
3909 "trace internal invoke dynamic operations") \
3910 \
3911 diagnostic(bool, PauseAtStartup, false, \
3912 "Causes the VM to pause at startup time and wait for the pause " \
3913 "file to be removed (default: ./vm.paused.<pid>)") \
3914 \
3915 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3916 "The file to create and for whose removal to await when pausing " \
3917 "at startup. (default: ./vm.paused.<pid>)") \
3918 \
3919 diagnostic(bool, PauseAtExit, false, \
3920 "Pause and wait for keypress on exit if a debugger is attached") \
3921 \
3922 product(bool, ExtendedDTraceProbes, false, \
3923 "Enable performance-impacting dtrace probes") \
3924 \
3925 product(bool, DTraceMethodProbes, false, \
3926 "Enable dtrace probes for method-entry and method-exit") \
3927 \
3928 product(bool, DTraceAllocProbes, false, \
3929 "Enable dtrace probes for object allocation") \
3930 \
3931 product(bool, DTraceMonitorProbes, false, \
3932 "Enable dtrace probes for monitor events") \
3933 \
3934 product(bool, RelaxAccessControlCheck, false, \
3935 "Relax the access control checks in the verifier") \
3936 \
3937 diagnostic(bool, PrintDTraceDOF, false, \
3938 "Print the DTrace DOF passed to the system for JSDT probes") \
3939 \
3940 product(uintx, StringTableSize, defaultStringTableSize, \
3941 "Number of buckets in the interned String table") \
3942 \
3943 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \
3944 "Number of buckets in the JVM internal Symbol table") \
3945 \
3946 product(bool, UseStringDeduplication, false, \
3947 "Use string deduplication") \
3948 \
3949 product(bool, PrintStringDeduplicationStatistics, false, \
3950 "Print string deduplication statistics") \
3951 \
3952 product(uintx, StringDeduplicationAgeThreshold, 3, \
3953 "A string must reach this age (or be promoted to an old region) " \
3954 "to be considered for deduplication") \
3955 \
3956 diagnostic(bool, StringDeduplicationResizeALot, false, \
3957 "Force table resize every time the table is scanned") \
3958 \
3959 diagnostic(bool, StringDeduplicationRehashALot, false, \
3960 "Force table rehash every time the table is scanned") \
3961 \
3962 develop(bool, TraceDefaultMethods, false, \
3963 "Trace the default method processing steps") \
3964 \
3965 develop(bool, VerifyGenericSignatures, false, \
3966 "Abort VM on erroneous or inconsistent generic signatures") \
3967 \
3968 product(bool, UseVMInterruptibleIO, false, \
3969 "(Unstable, Solaris-specific) Thread interrupt before or with " \
3970 "EINTR for I/O operations results in OS_INTRPT. The default " \
3971 "value of this flag is true for JDK 6 and earlier") \
3972 \
3973 diagnostic(bool, WhiteBoxAPI, false, \
3974 "Enable internal testing APIs") \
3975 \
3976 product(bool, PrintGCCause, true, \
3977 "Include GC cause in GC logging") \
3978 \
3979 experimental(intx, SurvivorAlignmentInBytes, 0, \
3980 "Default survivor space alignment in bytes") \
3981 \
3982 product(bool , AllowNonVirtualCalls, false, \
3983 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \
3984 \
3985 product(ccstr, DumpLoadedClassList, NULL, \
3986 "Dump the names all loaded classes, that could be stored into " \
3987 "the CDS archive, in the specified file") \
3988 \
3989 product(ccstr, SharedClassListFile, NULL, \
3990 "Override the default CDS class list") \
3991 \
3992 diagnostic(ccstr, SharedArchiveFile, NULL, \
3993 "Override the default location of the CDS archive file") \
3994 \
3995 product(ccstr, ExtraSharedClassListFile, NULL, \
3996 "Extra classlist for building the CDS archive file") \
3997 \
3998 experimental(uintx, ArrayAllocatorMallocLimit, \
3999 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \
4000 "Allocation less than this value will be allocated " \
4001 "using malloc. Larger allocations will use mmap.") \
4002 \
4003 product(bool, EnableTracing, false, \
4004 "Enable event-based tracing") \
4005 \
4006 product(bool, UseLockedTracing, false, \
4007 "Use locked-tracing when doing event-based tracing") \
4008 \
4009 product_pd(bool, PreserveFramePointer, \
4010 "Use the FP register for holding the frame pointer " \
4011 "and not as a general purpose register.") \
4012 \
4013 TRACE_ONLY(product(bool, FlightRecorder, false, \
4014 "Enable Flight Recorder")) \
4015 \
4016 TRACE_ONLY(product(ccstr, FlightRecorderOptions, NULL, \
4017 "Flight Recorder options")) \
4018 \
4019 TRACE_ONLY(product(ccstr, StartFlightRecording, NULL, \
4020 "Start flight recording with options")) \
4021 \
4022 experimental(bool, UseFastUnorderedTimeStamps, false, \
4023 "Use platform unstable time where supported for timestamps only") \
4024 \
4025 product(bool, PrintJFRLog, false, \
4026 "Print JFR log ") \
4027 \
4028 product(bool, EnableJFR, false, "Enable JFR feature") \
4029
4030 /*
4031 * Macros for factoring of globals
4032 */
4033
4034 // Interface macros
4035 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4036 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
4037 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
4038 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
4039 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
4040 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
4041 #ifdef PRODUCT
4042 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value;
4043 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name;
4044 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name;
4045 #else
4046 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
4047 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
4048 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4049 #endif
4050 // Special LP64 flags, product only needed for now.
4051 #ifdef _LP64
4052 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4053 #else
4054 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
4055 #endif // _LP64
4056
4057 // Implementation macros
4058 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
4059 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
4060 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
4061 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
4062 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
4063 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
4064 #ifdef PRODUCT
4065 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value;
4066 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name;
4067 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value;
4068 #else
4069 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
4070 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
4071 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
4072 #endif
4073 #ifdef _LP64
4074 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
4075 #else
4076 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
4077 #endif // _LP64
4078
4079 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)
4080
4081 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
4082
4083 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
4084
4085 // Extensions
4086
4087 #include "runtime/globals_ext.hpp"
4088
4089 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP