1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
26 #define SHARE_VM_RUNTIME_GLOBALS_HPP
27
28 #include "utilities/debug.hpp"
29
30 // use this for flags that are true per default in the tiered build
31 // but false in non-tiered builds, and vice versa
32 #ifdef TIERED
33 #define trueInTiered true
34 #define falseInTiered false
35 #else
36 #define trueInTiered false
37 #define falseInTiered true
38 #endif
39
40 #ifdef TARGET_ARCH_x86
41 # include "globals_x86.hpp"
42 #endif
43 #ifdef TARGET_ARCH_sparc
44 # include "globals_sparc.hpp"
45 #endif
46 #ifdef TARGET_ARCH_zero
47 # include "globals_zero.hpp"
48 #endif
49 #ifdef TARGET_ARCH_arm
50 # include "globals_arm.hpp"
51 #endif
52 #ifdef TARGET_ARCH_ppc
53 # include "globals_ppc.hpp"
54 #endif
55 #ifdef TARGET_ARCH_aarch64
56 # include "globals_aarch64.hpp"
57 #endif
58 #ifdef TARGET_OS_FAMILY_linux
59 # include "globals_linux.hpp"
60 #endif
61 #ifdef TARGET_OS_FAMILY_solaris
62 # include "globals_solaris.hpp"
63 #endif
64 #ifdef TARGET_OS_FAMILY_windows
65 # include "globals_windows.hpp"
66 #endif
67 #ifdef TARGET_OS_FAMILY_aix
68 # include "globals_aix.hpp"
69 #endif
70 #ifdef TARGET_OS_FAMILY_bsd
71 # include "globals_bsd.hpp"
72 #endif
73 #ifdef TARGET_OS_ARCH_linux_x86
74 # include "globals_linux_x86.hpp"
75 #endif
76 #ifdef TARGET_OS_ARCH_linux_sparc
77 # include "globals_linux_sparc.hpp"
78 #endif
79 #ifdef TARGET_OS_ARCH_linux_zero
80 # include "globals_linux_zero.hpp"
81 #endif
82 #ifdef TARGET_OS_ARCH_solaris_x86
83 # include "globals_solaris_x86.hpp"
84 #endif
85 #ifdef TARGET_OS_ARCH_solaris_sparc
86 # include "globals_solaris_sparc.hpp"
87 #endif
88 #ifdef TARGET_OS_ARCH_windows_x86
89 # include "globals_windows_x86.hpp"
90 #endif
91 #ifdef TARGET_OS_ARCH_linux_arm
92 # include "globals_linux_arm.hpp"
93 #endif
94 #ifdef TARGET_OS_ARCH_linux_ppc
95 # include "globals_linux_ppc.hpp"
96 #endif
97 #ifdef TARGET_OS_ARCH_linux_aarch64
98 # include "globals_linux_aarch64.hpp"
99 #endif
100 #ifdef TARGET_OS_ARCH_aix_ppc
101 # include "globals_aix_ppc.hpp"
102 #endif
103 #ifdef TARGET_OS_ARCH_bsd_x86
104 # include "globals_bsd_x86.hpp"
105 #endif
106 #ifdef TARGET_OS_ARCH_bsd_zero
107 # include "globals_bsd_zero.hpp"
108 #endif
109 #ifdef COMPILER1
110 #ifdef TARGET_ARCH_x86
111 # include "c1_globals_x86.hpp"
112 #endif
113 #ifdef TARGET_ARCH_sparc
114 # include "c1_globals_sparc.hpp"
115 #endif
116 #ifdef TARGET_ARCH_arm
117 # include "c1_globals_arm.hpp"
118 #endif
119 #ifdef TARGET_ARCH_aarch64
120 # include "c1_globals_aarch64.hpp"
121 #endif
122 #ifdef TARGET_OS_FAMILY_linux
123 # include "c1_globals_linux.hpp"
124 #endif
125 #ifdef TARGET_OS_FAMILY_solaris
126 # include "c1_globals_solaris.hpp"
127 #endif
128 #ifdef TARGET_OS_FAMILY_windows
129 # include "c1_globals_windows.hpp"
130 #endif
131 #ifdef TARGET_OS_FAMILY_aix
132 # include "c1_globals_aix.hpp"
133 #endif
134 #ifdef TARGET_OS_FAMILY_bsd
135 # include "c1_globals_bsd.hpp"
136 #endif
137 #ifdef TARGET_ARCH_ppc
138 # include "c1_globals_ppc.hpp"
139 #endif
140 #endif
141 #ifdef COMPILER2
142 #ifdef TARGET_ARCH_x86
143 # include "c2_globals_x86.hpp"
144 #endif
145 #ifdef TARGET_ARCH_sparc
146 # include "c2_globals_sparc.hpp"
147 #endif
148 #ifdef TARGET_ARCH_arm
149 # include "c2_globals_arm.hpp"
150 #endif
151 #ifdef TARGET_ARCH_ppc
152 # include "c2_globals_ppc.hpp"
153 #endif
154 #ifdef TARGET_ARCH_aarch64
155 # include "c2_globals_aarch64.hpp"
156 #endif
157 #ifdef TARGET_OS_FAMILY_linux
158 # include "c2_globals_linux.hpp"
159 #endif
160 #ifdef TARGET_OS_FAMILY_solaris
161 # include "c2_globals_solaris.hpp"
162 #endif
163 #ifdef TARGET_OS_FAMILY_windows
164 # include "c2_globals_windows.hpp"
165 #endif
166 #ifdef TARGET_OS_FAMILY_aix
167 # include "c2_globals_aix.hpp"
168 #endif
169 #ifdef TARGET_OS_FAMILY_bsd
170 # include "c2_globals_bsd.hpp"
171 #endif
172 #endif
173 #ifdef SHARK
174 #ifdef TARGET_ARCH_zero
175 # include "shark_globals_zero.hpp"
176 #endif
177 #endif
178
179 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
180 define_pd_global(bool, BackgroundCompilation, false);
181 define_pd_global(bool, UseTLAB, false);
182 define_pd_global(bool, CICompileOSR, false);
183 define_pd_global(bool, UseTypeProfile, false);
184 define_pd_global(bool, UseOnStackReplacement, false);
185 define_pd_global(bool, InlineIntrinsics, false);
186 define_pd_global(bool, PreferInterpreterNativeStubs, true);
187 define_pd_global(bool, ProfileInterpreter, false);
188 define_pd_global(bool, ProfileTraps, false);
189 define_pd_global(bool, TieredCompilation, false);
190
191 define_pd_global(intx, CompileThreshold, 0);
192
193 define_pd_global(intx, OnStackReplacePercentage, 0);
194 define_pd_global(bool, ResizeTLAB, false);
195 define_pd_global(intx, FreqInlineSize, 0);
196 define_pd_global(size_t, NewSizeThreadIncrease, 4*K);
197 define_pd_global(intx, InlineClassNatives, true);
198 define_pd_global(intx, InlineUnsafeOps, true);
199 define_pd_global(intx, InitialCodeCacheSize, 160*K);
200 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
201 define_pd_global(intx, NonProfiledCodeHeapSize, 0);
202 define_pd_global(intx, ProfiledCodeHeapSize, 0);
203 define_pd_global(intx, NonNMethodCodeHeapSize, 32*M);
204
205 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
206 define_pd_global(intx, CodeCacheMinBlockLength, 1);
207 define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K);
208 define_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M));
209 define_pd_global(bool, NeverActAsServerClassMachine, true);
210 define_pd_global(uint64_t,MaxRAM, 1ULL*G);
211 #define CI_COMPILER_COUNT 0
212 #else
213
214 #ifdef COMPILER2
215 #define CI_COMPILER_COUNT 2
216 #else
217 #define CI_COMPILER_COUNT 1
218 #endif // COMPILER2
219
220 #endif // no compilers
221
222 // string type aliases used only in this file
223 typedef const char* ccstr;
224 typedef const char* ccstrlist; // represents string arguments which accumulate
225
226 struct Flag {
227 enum Flags {
228 // value origin
229 DEFAULT = 0,
230 COMMAND_LINE = 1,
231 ENVIRON_VAR = 2,
232 CONFIG_FILE = 3,
233 MANAGEMENT = 4,
234 ERGONOMIC = 5,
235 ATTACH_ON_DEMAND = 6,
236 INTERNAL = 7,
237
238 LAST_VALUE_ORIGIN = INTERNAL,
239 VALUE_ORIGIN_BITS = 4,
240 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
241
242 // flag kind
243 KIND_PRODUCT = 1 << 4,
244 KIND_MANAGEABLE = 1 << 5,
245 KIND_DIAGNOSTIC = 1 << 6,
246 KIND_EXPERIMENTAL = 1 << 7,
247 KIND_NOT_PRODUCT = 1 << 8,
248 KIND_DEVELOP = 1 << 9,
249 KIND_PLATFORM_DEPENDENT = 1 << 10,
250 KIND_READ_WRITE = 1 << 11,
251 KIND_C1 = 1 << 12,
252 KIND_C2 = 1 << 13,
253 KIND_ARCH = 1 << 14,
254 KIND_SHARK = 1 << 15,
255 KIND_LP64_PRODUCT = 1 << 16,
256 KIND_COMMERCIAL = 1 << 17,
257
258 KIND_MASK = ~VALUE_ORIGIN_MASK
259 };
260
261 enum Error {
262 // no error
263 SUCCESS = 0,
264 // flag name is missing
265 MISSING_NAME,
266 // flag value is missing
267 MISSING_VALUE,
268 // error parsing the textual form of the value
269 WRONG_FORMAT,
270 // flag is not writeable
271 NON_WRITABLE,
272 // flag value is outside of its bounds
273 OUT_OF_BOUNDS,
274 // flag value violates its constraint
275 VIOLATES_CONSTRAINT,
276 // there is no flag with the given name
277 INVALID_FLAG,
278 // other, unspecified error related to setting the flag
279 ERR_OTHER
280 };
281
282 const char* _type;
283 const char* _name;
284 void* _addr;
285 NOT_PRODUCT(const char* _doc;)
286 Flags _flags;
287
288 // points to all Flags static array
289 static Flag* flags;
290
291 // number of flags
292 static size_t numFlags;
293
294 static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); };
295 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false);
296 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
297
298 void check_writable();
299
300 bool is_bool() const;
301 bool get_bool() const;
302 void set_bool(bool value);
303
304 bool is_intx() const;
305 intx get_intx() const;
306 void set_intx(intx value);
307
308 bool is_uintx() const;
309 uintx get_uintx() const;
310 void set_uintx(uintx value);
311
312 bool is_uint64_t() const;
313 uint64_t get_uint64_t() const;
314 void set_uint64_t(uint64_t value);
315
316 bool is_size_t() const;
317 size_t get_size_t() const;
318 void set_size_t(size_t value);
319
320 bool is_double() const;
321 double get_double() const;
322 void set_double(double value);
323
324 bool is_ccstr() const;
325 bool ccstr_accumulates() const;
326 ccstr get_ccstr() const;
327 void set_ccstr(ccstr value);
328
329 Flags get_origin();
330 void set_origin(Flags origin);
331
332 bool is_default();
333 bool is_ergonomic();
334 bool is_command_line();
335
336 bool is_product() const;
337 bool is_manageable() const;
338 bool is_diagnostic() const;
339 bool is_experimental() const;
340 bool is_notproduct() const;
341 bool is_develop() const;
342 bool is_read_write() const;
343 bool is_commercial() const;
344
345 bool is_constant_in_binary() const;
346
347 bool is_unlocker() const;
348 bool is_unlocked() const;
349 bool is_writeable() const;
350 bool is_external() const;
351
352 bool is_unlocker_ext() const;
353 bool is_unlocked_ext() const;
354 bool is_writeable_ext() const;
355 bool is_external_ext() const;
356
357 void unlock_diagnostic();
358
359 void get_locked_message(char*, int) const;
360 void get_locked_message_ext(char*, int) const;
361
362 void print_on(outputStream* st, bool printRanges = false, bool withComments = false );
363 void print_kind(outputStream* st);
364 void print_as_flag(outputStream* st);
365 };
366
367 // debug flags control various aspects of the VM and are global accessible
368
369 // use FlagSetting to temporarily change some debug flag
370 // e.g. FlagSetting fs(DebugThisAndThat, true);
371 // restored to previous value upon leaving scope
372 class FlagSetting {
373 bool val;
374 bool* flag;
375 public:
376 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
377 ~FlagSetting() { *flag = val; }
378 };
379
380
381 class CounterSetting {
382 intx* counter;
383 public:
384 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
385 ~CounterSetting() { (*counter)--; }
386 };
387
388
389 class UIntFlagSetting {
390 uintx val;
391 uintx* flag;
392 public:
393 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
394 ~UIntFlagSetting() { *flag = val; }
395 };
396
397 class DoubleFlagSetting {
398 double val;
399 double* flag;
400 public:
401 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
402 ~DoubleFlagSetting() { *flag = val; }
403 };
404
405 class SizeTFlagSetting {
406 size_t val;
407 size_t* flag;
408 public:
409 SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; }
410 ~SizeTFlagSetting() { *flag = val; }
411 };
412
413
414 class CommandLineFlags {
415 static bool _finished_initializing;
416 public:
417 static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false);
418 static Flag::Error boolAt(const char* name, bool* value, bool allow_locked = false, bool return_flag = false) { return boolAt(name, strlen(name), value, allow_locked, return_flag); }
419 static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin);
420 static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); }
421
422 static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false);
423 static Flag::Error intxAt(const char* name, intx* value, bool allow_locked = false, bool return_flag = false) { return intxAt(name, strlen(name), value, allow_locked, return_flag); }
424 static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin);
425 static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); }
426
427 static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false);
428 static Flag::Error uintxAt(const char* name, uintx* value, bool allow_locked = false, bool return_flag = false) { return uintxAt(name, strlen(name), value, allow_locked, return_flag); }
429 static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin);
430 static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
431
432 static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false);
433 static Flag::Error size_tAt(const char* name, size_t* value, bool allow_locked = false, bool return_flag = false) { return size_tAt(name, strlen(name), value, allow_locked, return_flag); }
434 static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin);
435 static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); }
436
437 static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false);
438 static Flag::Error uint64_tAt(const char* name, uint64_t* value, bool allow_locked = false, bool return_flag = false) { return uint64_tAt(name, strlen(name), value, allow_locked, return_flag); }
439 static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin);
440 static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
441
442 static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false);
443 static Flag::Error doubleAt(const char* name, double* value, bool allow_locked = false, bool return_flag = false) { return doubleAt(name, strlen(name), value, allow_locked, return_flag); }
444 static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin);
445 static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
446
447 static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false);
448 static Flag::Error ccstrAt(const char* name, ccstr* value, bool allow_locked = false, bool return_flag = false) { return ccstrAt(name, strlen(name), value, allow_locked, return_flag); }
449 // Contract: Flag will make private copy of the incoming value.
450 // Outgoing value is always malloc-ed, and caller MUST call free.
451 static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin);
452 static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
453
454 // Returns false if name is not a command line flag.
455 static bool wasSetOnCmdline(const char* name, bool* value);
456 static void printSetFlags(outputStream* out);
457
458 static void printFlags(outputStream* out, bool withComments, bool printRanges = false);
459
460 // Returns true if all flags have their final values set (ready for ranges and constraint check)
461 static bool finishedInitializing() { return _finished_initializing; }
462
463 // Check the final values of all flags for ranges and constraints
464 static bool check_all_ranges_and_constraints();
465
466 static void verify() PRODUCT_RETURN;
467 };
468
469 // use this for flags that are true by default in the debug version but
470 // false in the optimized version, and vice versa
471 #ifdef ASSERT
472 #define trueInDebug true
473 #define falseInDebug false
474 #else
475 #define trueInDebug false
476 #define falseInDebug true
477 #endif
478
479 // use this for flags that are true per default in the product build
480 // but false in development builds, and vice versa
481 #ifdef PRODUCT
482 #define trueInProduct true
483 #define falseInProduct false
484 #else
485 #define trueInProduct false
486 #define falseInProduct true
487 #endif
488
489 #ifdef JAVASE_EMBEDDED
490 #define falseInEmbedded false
491 #else
492 #define falseInEmbedded true
493 #endif
494
495 // develop flags are settable / visible only during development and are constant in the PRODUCT version
496 // product flags are always settable / visible
497 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
498
499 // A flag must be declared with one of the following types:
500 // bool, intx, uintx, size_t, ccstr, double, or uint64_t.
501 // The type "ccstr" is an alias for "const char*" and is used
502 // only in this file, because the macrology requires single-token type names.
503
504 // Note: Diagnostic options not meant for VM tuning or for product modes.
505 // They are to be used for VM quality assurance or field diagnosis
506 // of VM bugs. They are hidden so that users will not be encouraged to
507 // try them as if they were VM ordinary execution options. However, they
508 // are available in the product version of the VM. Under instruction
509 // from support engineers, VM customers can turn them on to collect
510 // diagnostic information about VM problems. To use a VM diagnostic
511 // option, you must first specify +UnlockDiagnosticVMOptions.
512 // (This master switch also affects the behavior of -Xprintflags.)
513 //
514 // experimental flags are in support of features that are not
515 // part of the officially supported product, but are available
516 // for experimenting with. They could, for example, be performance
517 // features that may not have undergone full or rigorous QA, but which may
518 // help performance in some cases and released for experimentation
519 // by the community of users and developers. This flag also allows one to
520 // be able to build a fully supported product that nonetheless also
521 // ships with some unsupported, lightly tested, experimental features.
522 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
523 // UnlockExperimentalVMOptions flag, which allows the control and
524 // modification of the experimental flags.
525 //
526 // Nota bene: neither diagnostic nor experimental options should be used casually,
527 // and they are not supported on production loads, except under explicit
528 // direction from support engineers.
529 //
530 // manageable flags are writeable external product flags.
531 // They are dynamically writeable through the JDK management interface
532 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
533 // These flags are external exported interface (see CCC). The list of
534 // manageable flags can be queried programmatically through the management
535 // interface.
536 //
537 // A flag can be made as "manageable" only if
538 // - the flag is defined in a CCC as an external exported interface.
539 // - the VM implementation supports dynamic setting of the flag.
540 // This implies that the VM must *always* query the flag variable
541 // and not reuse state related to the flag state at any given time.
542 // - you want the flag to be queried programmatically by the customers.
543 //
544 // product_rw flags are writeable internal product flags.
545 // They are like "manageable" flags but for internal/private use.
546 // The list of product_rw flags are internal/private flags which
547 // may be changed/removed in a future release. It can be set
548 // through the management interface to get/set value
549 // when the name of flag is supplied.
550 //
551 // A flag can be made as "product_rw" only if
552 // - the VM implementation supports dynamic setting of the flag.
553 // This implies that the VM must *always* query the flag variable
554 // and not reuse state related to the flag state at any given time.
555 //
556 // Note that when there is a need to support develop flags to be writeable,
557 // it can be done in the same way as product_rw.
558 //
559 // range is a macro that will expand to min and max arguments for range
560 // checking code if provided - see commandLineFlagRangeList.hpp
561 //
562 // constraint is a macro that will expand to custom function call
563 // for constraint checking if provided - see commandLineFlagConstraintList.hpp
564 //
565
566 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product, range, constraint) \
567 \
568 lp64_product(bool, UseCompressedOops, false, \
569 "Use 32-bit object references in 64-bit VM. " \
570 "lp64_product means flag is always constant in 32 bit VM") \
571 \
572 lp64_product(bool, UseCompressedClassPointers, false, \
573 "Use 32-bit class pointers in 64-bit VM. " \
574 "lp64_product means flag is always constant in 32 bit VM") \
575 \
576 notproduct(bool, CheckCompressedOops, true, \
577 "Generate checks in encoding/decoding code in debug VM") \
578 \
579 product_pd(size_t, HeapBaseMinAddress, \
580 "OS specific low limit for heap base address") \
581 \
582 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \
583 "Heap allocation steps through preferred address regions to find" \
584 " where it can allocate the heap. Number of steps to take per " \
585 "region.") \
586 range(1, max_uintx) \
587 \
588 diagnostic(bool, PrintCompressedOopsMode, false, \
589 "Print compressed oops base address and encoding mode") \
590 \
591 lp64_product(intx, ObjectAlignmentInBytes, 8, \
592 "Default object alignment in bytes, 8 is minimum") \
593 range(8, 256) \
594 constraint(ObjectAlignmentInBytesConstraintFunc) \
595 \
596 product(bool, AssumeMP, false, \
597 "Instruct the VM to assume multiple processors are available") \
598 \
599 /* UseMembar is theoretically a temp flag used for memory barrier */ \
600 /* removal testing. It was supposed to be removed before FCS but has */ \
601 /* been re-added (see 6401008) */ \
602 product_pd(bool, UseMembar, \
603 "(Unstable) Issues membars on thread state transitions") \
604 \
605 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
606 "Clean the chunk pool asynchronously") \
607 \
608 experimental(bool, AlwaysSafeConstructors, false, \
609 "Force safe construction, as if all fields are final.") \
610 \
611 /* Temporary: See 6948537 */ \
612 experimental(bool, UseMemSetInBOT, true, \
613 "(Unstable) uses memset in BOT updates in GC code") \
614 \
615 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
616 "Enable normal processing of flags relating to field diagnostics")\
617 \
618 experimental(bool, UnlockExperimentalVMOptions, false, \
619 "Enable normal processing of flags relating to experimental " \
620 "features") \
621 \
622 product(bool, JavaMonitorsInStackTrace, true, \
623 "Print information about Java monitor locks when the stacks are" \
624 "dumped") \
625 \
626 product_pd(bool, UseLargePages, \
627 "Use large page memory") \
628 \
629 product_pd(bool, UseLargePagesIndividualAllocation, \
630 "Allocate large pages individually for better affinity") \
631 \
632 develop(bool, LargePagesIndividualAllocationInjectError, false, \
633 "Fail large pages individual allocation") \
634 \
635 product(bool, UseLargePagesInMetaspace, false, \
636 "Use large page memory in metaspace. " \
637 "Only used if UseLargePages is enabled.") \
638 \
639 develop(bool, TracePageSizes, false, \
640 "Trace page size selection and usage") \
641 \
642 product(bool, UseNUMA, false, \
643 "Use NUMA if available") \
644 \
645 product(bool, UseNUMAInterleaving, false, \
646 "Interleave memory across NUMA nodes if available") \
647 \
648 product(size_t, NUMAInterleaveGranularity, 2*M, \
649 "Granularity to use for NUMA interleaving on Windows OS") \
650 \
651 product(bool, ForceNUMA, false, \
652 "Force NUMA optimizations on single-node/UMA systems") \
653 \
654 product(uintx, NUMAChunkResizeWeight, 20, \
655 "Percentage (0-100) used to weight the current sample when " \
656 "computing exponentially decaying average for " \
657 "AdaptiveNUMAChunkSizing") \
658 range(0, 100) \
659 \
660 product(size_t, NUMASpaceResizeRate, 1*G, \
661 "Do not reallocate more than this amount per collection") \
662 \
663 product(bool, UseAdaptiveNUMAChunkSizing, true, \
664 "Enable adaptive chunk sizing for NUMA") \
665 \
666 product(bool, NUMAStats, false, \
667 "Print NUMA stats in detailed heap information") \
668 \
669 product(uintx, NUMAPageScanRate, 256, \
670 "Maximum number of pages to include in the page scan procedure") \
671 \
672 product_pd(bool, NeedsDeoptSuspend, \
673 "True for register window machines (sparc/ia64)") \
674 \
675 product(intx, UseSSE, 99, \
676 "Highest supported SSE instructions set on x86/x64") \
677 \
678 product(bool, UseAES, false, \
679 "Control whether AES instructions can be used on x86/x64") \
680 \
681 product(bool, UseSHA, false, \
682 "Control whether SHA instructions can be used on SPARC") \
683 \
684 product(size_t, LargePageSizeInBytes, 0, \
685 "Large page size (0 to let VM choose the page size)") \
686 \
687 product(size_t, LargePageHeapSizeThreshold, 128*M, \
688 "Use large pages if maximum heap is at least this big") \
689 \
690 product(bool, ForceTimeHighResolution, false, \
691 "Using high time resolution (for Win32 only)") \
692 \
693 develop(bool, TraceItables, false, \
694 "Trace initialization and use of itables") \
695 \
696 develop(bool, TracePcPatching, false, \
697 "Trace usage of frame::patch_pc") \
698 \
699 develop(bool, TraceJumps, false, \
700 "Trace assembly jumps in thread ring buffer") \
701 \
702 develop(bool, TraceRelocator, false, \
703 "Trace the bytecode relocator") \
704 \
705 develop(bool, TraceLongCompiles, false, \
706 "Print out every time compilation is longer than " \
707 "a given threshold") \
708 \
709 develop(bool, SafepointALot, false, \
710 "Generate a lot of safepoints. This works with " \
711 "GuaranteedSafepointInterval") \
712 \
713 product_pd(bool, BackgroundCompilation, \
714 "A thread requesting compilation is not blocked during " \
715 "compilation") \
716 \
717 product(bool, PrintVMQWaitTime, false, \
718 "Print out the waiting time in VM operation queue") \
719 \
720 develop(bool, TraceOopMapGeneration, false, \
721 "Show OopMapGeneration") \
722 \
723 product(bool, MethodFlushing, true, \
724 "Reclamation of zombie and not-entrant methods") \
725 \
726 develop(bool, VerifyStack, false, \
727 "Verify stack of each thread when it is entering a runtime call") \
728 \
729 diagnostic(bool, ForceUnreachable, false, \
730 "Make all non code cache addresses to be unreachable by " \
731 "forcing use of 64bit literal fixups") \
732 \
733 notproduct(bool, StressDerivedPointers, false, \
734 "Force scavenge when a derived pointer is detected on stack " \
735 "after rtm call") \
736 \
737 develop(bool, TraceDerivedPointers, false, \
738 "Trace traversal of derived pointers on stack") \
739 \
740 notproduct(bool, TraceCodeBlobStacks, false, \
741 "Trace stack-walk of codeblobs") \
742 \
743 product(bool, PrintJNIResolving, false, \
744 "Used to implement -v:jni") \
745 \
746 notproduct(bool, PrintRewrites, false, \
747 "Print methods that are being rewritten") \
748 \
749 product(bool, UseInlineCaches, true, \
750 "Use Inline Caches for virtual calls ") \
751 \
752 develop(bool, InlineArrayCopy, true, \
753 "Inline arraycopy native that is known to be part of " \
754 "base library DLL") \
755 \
756 develop(bool, InlineObjectHash, true, \
757 "Inline Object::hashCode() native that is known to be part " \
758 "of base library DLL") \
759 \
760 develop(bool, InlineNatives, true, \
761 "Inline natives that are known to be part of base library DLL") \
762 \
763 develop(bool, InlineMathNatives, true, \
764 "Inline SinD, CosD, etc.") \
765 \
766 develop(bool, InlineClassNatives, true, \
767 "Inline Class.isInstance, etc") \
768 \
769 develop(bool, InlineThreadNatives, true, \
770 "Inline Thread.currentThread, etc") \
771 \
772 develop(bool, InlineUnsafeOps, true, \
773 "Inline memory ops (native methods) from sun.misc.Unsafe") \
774 \
775 product(bool, CriticalJNINatives, true, \
776 "Check for critical JNI entry points") \
777 \
778 notproduct(bool, StressCriticalJNINatives, false, \
779 "Exercise register saving code in critical natives") \
780 \
781 product(bool, UseSSE42Intrinsics, false, \
782 "SSE4.2 versions of intrinsics") \
783 \
784 product(bool, UseAESIntrinsics, false, \
785 "Use intrinsics for AES versions of crypto") \
786 \
787 product(bool, UseSHA1Intrinsics, false, \
788 "Use intrinsics for SHA-1 crypto hash function") \
789 \
790 product(bool, UseSHA256Intrinsics, false, \
791 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions") \
792 \
793 product(bool, UseSHA512Intrinsics, false, \
794 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions") \
795 \
796 product(bool, UseCRC32Intrinsics, false, \
797 "use intrinsics for java.util.zip.CRC32") \
798 \
799 develop(bool, TraceCallFixup, false, \
800 "Trace all call fixups") \
801 \
802 develop(bool, DeoptimizeALot, false, \
803 "Deoptimize at every exit from the runtime system") \
804 \
805 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
806 "A comma separated list of bcis to deoptimize at") \
807 \
808 product(bool, DeoptimizeRandom, false, \
809 "Deoptimize random frames on random exit from the runtime system")\
810 \
811 notproduct(bool, ZombieALot, false, \
812 "Create zombies (non-entrant) at exit from the runtime system") \
813 \
814 product(bool, UnlinkSymbolsALot, false, \
815 "Unlink unreferenced symbols from the symbol table at safepoints")\
816 \
817 notproduct(bool, WalkStackALot, false, \
818 "Trace stack (no print) at every exit from the runtime system") \
819 \
820 product(bool, Debugging, false, \
821 "Set when executing debug methods in debug.cpp " \
822 "(to prevent triggering assertions)") \
823 \
824 notproduct(bool, StrictSafepointChecks, trueInDebug, \
825 "Enable strict checks that safepoints cannot happen for threads " \
826 "that use No_Safepoint_Verifier") \
827 \
828 notproduct(bool, VerifyLastFrame, false, \
829 "Verify oops on last frame on entry to VM") \
830 \
831 develop(bool, TraceHandleAllocation, false, \
832 "Print out warnings when suspiciously many handles are allocated")\
833 \
834 product(bool, FailOverToOldVerifier, true, \
835 "Fail over to old verifier when split verifier fails") \
836 \
837 develop(bool, ShowSafepointMsgs, false, \
838 "Show message about safepoint synchronization") \
839 \
840 product(bool, SafepointTimeout, false, \
841 "Time out and warn or fail after SafepointTimeoutDelay " \
842 "milliseconds if failed to reach safepoint") \
843 \
844 develop(bool, DieOnSafepointTimeout, false, \
845 "Die upon failure to reach safepoint (see SafepointTimeout)") \
846 \
847 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
848 /* typically, at most a few retries are needed */ \
849 product(intx, SuspendRetryCount, 50, \
850 "Maximum retry count for an external suspend request") \
851 \
852 product(intx, SuspendRetryDelay, 5, \
853 "Milliseconds to delay per retry (* current_retry_count)") \
854 \
855 product(bool, AssertOnSuspendWaitFailure, false, \
856 "Assert/Guarantee on external suspend wait failure") \
857 \
858 product(bool, TraceSuspendWaitFailures, false, \
859 "Trace external suspend wait failures") \
860 \
861 product(bool, MaxFDLimit, true, \
862 "Bump the number of file descriptors to maximum in Solaris") \
863 \
864 diagnostic(bool, LogEvents, true, \
865 "Enable the various ring buffer event logs") \
866 \
867 diagnostic(uintx, LogEventsBufferEntries, 10, \
868 "Number of ring buffer event logs") \
869 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \
870 \
871 product(bool, BytecodeVerificationRemote, true, \
872 "Enable the Java bytecode verifier for remote classes") \
873 \
874 product(bool, BytecodeVerificationLocal, false, \
875 "Enable the Java bytecode verifier for local classes") \
876 \
877 develop(bool, ForceFloatExceptions, trueInDebug, \
878 "Force exceptions on FP stack under/overflow") \
879 \
880 develop(bool, VerifyStackAtCalls, false, \
881 "Verify that the stack pointer is unchanged after calls") \
882 \
883 develop(bool, TraceJavaAssertions, false, \
884 "Trace java language assertions") \
885 \
886 notproduct(bool, CheckAssertionStatusDirectives, false, \
887 "Temporary - see javaClasses.cpp") \
888 \
889 notproduct(bool, PrintMallocFree, false, \
890 "Trace calls to C heap malloc/free allocation") \
891 \
892 product(bool, PrintOopAddress, false, \
893 "Always print the location of the oop") \
894 \
895 notproduct(bool, VerifyCodeCache, false, \
896 "Verify code cache on memory allocation/deallocation") \
897 \
898 develop(bool, ZapDeadCompiledLocals, false, \
899 "Zap dead locals in compiler frames") \
900 \
901 notproduct(bool, ZapDeadLocalsOld, false, \
902 "Zap dead locals (old version, zaps all frames when " \
903 "entering the VM") \
904 \
905 notproduct(bool, CheckOopishValues, false, \
906 "Warn if value contains oop (requires ZapDeadLocals)") \
907 \
908 develop(bool, UseMallocOnly, false, \
909 "Use only malloc/free for allocation (no resource area/arena)") \
910 \
911 develop(bool, PrintMalloc, false, \
912 "Print all malloc/free calls") \
913 \
914 develop(bool, PrintMallocStatistics, false, \
915 "Print malloc/free statistics") \
916 \
917 develop(bool, ZapResourceArea, trueInDebug, \
918 "Zap freed resource/arena space with 0xABABABAB") \
919 \
920 notproduct(bool, ZapVMHandleArea, trueInDebug, \
921 "Zap freed VM handle space with 0xBCBCBCBC") \
922 \
923 develop(bool, ZapJNIHandleArea, trueInDebug, \
924 "Zap freed JNI handle space with 0xFEFEFEFE") \
925 \
926 notproduct(bool, ZapStackSegments, trueInDebug, \
927 "Zap allocated/freed stack segments with 0xFADFADED") \
928 \
929 develop(bool, ZapUnusedHeapArea, trueInDebug, \
930 "Zap unused heap space with 0xBAADBABE") \
931 \
932 develop(bool, TraceZapUnusedHeapArea, false, \
933 "Trace zapping of unused heap space") \
934 \
935 develop(bool, CheckZapUnusedHeapArea, false, \
936 "Check zapping of unused heap space") \
937 \
938 develop(bool, ZapFillerObjects, trueInDebug, \
939 "Zap filler objects with 0xDEAFBABE") \
940 \
941 develop(bool, PrintVMMessages, true, \
942 "Print VM messages on console") \
943 \
944 product(bool, PrintGCApplicationConcurrentTime, false, \
945 "Print the time the application has been running") \
946 \
947 product(bool, PrintGCApplicationStoppedTime, false, \
948 "Print the time the application has been stopped") \
949 \
950 diagnostic(bool, VerboseVerification, false, \
951 "Display detailed verification details") \
952 \
953 notproduct(uintx, ErrorHandlerTest, 0, \
954 "If > 0, provokes an error after VM initialization; the value " \
955 "determines which error to provoke. See test_error_handler() " \
956 "in debug.cpp.") \
957 \
958 notproduct(uintx, TestCrashInErrorHandler, 0, \
959 "If > 0, provokes an error inside VM error handler (a secondary " \
960 "crash). see test_error_handler() in debug.cpp.") \
961 \
962 notproduct(bool, TestSafeFetchInErrorHandler, false, \
963 "If true, tests SafeFetch inside error handler.") \
964 \
965 develop(bool, Verbose, false, \
966 "Print additional debugging information from other modes") \
967 \
968 develop(bool, PrintMiscellaneous, false, \
969 "Print uncategorized debugging information (requires +Verbose)") \
970 \
971 develop(bool, WizardMode, false, \
972 "Print much more debugging information") \
973 \
974 product(bool, ShowMessageBoxOnError, false, \
975 "Keep process alive on VM fatal error") \
976 \
977 product(bool, CreateCoredumpOnCrash, true, \
978 "Create core/mini dump on VM fatal error") \
979 \
980 product_pd(bool, UseOSErrorReporting, \
981 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
982 \
983 product(bool, SuppressFatalErrorMessage, false, \
984 "Report NO fatal error message (avoid deadlock)") \
985 \
986 product(ccstrlist, OnError, "", \
987 "Run user-defined commands on fatal error; see VMError.cpp " \
988 "for examples") \
989 \
990 product(ccstrlist, OnOutOfMemoryError, "", \
991 "Run user-defined commands on first java.lang.OutOfMemoryError") \
992 \
993 manageable(bool, HeapDumpBeforeFullGC, false, \
994 "Dump heap to file before any major stop-the-world GC") \
995 \
996 manageable(bool, HeapDumpAfterFullGC, false, \
997 "Dump heap to file after any major stop-the-world GC") \
998 \
999 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
1000 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
1001 \
1002 manageable(ccstr, HeapDumpPath, NULL, \
1003 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \
1004 "directory) of the dump file (defaults to java_pid<pid>.hprof " \
1005 "in the working directory)") \
1006 \
1007 develop(size_t, SegmentedHeapDumpThreshold, 2*G, \
1008 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
1009 "when the heap usage is larger than this") \
1010 \
1011 develop(size_t, HeapDumpSegmentSize, 1*G, \
1012 "Approximate segment size when generating a segmented heap dump") \
1013 \
1014 develop(bool, BreakAtWarning, false, \
1015 "Execute breakpoint upon encountering VM warning") \
1016 \
1017 develop(bool, TraceVMOperation, false, \
1018 "Trace VM operations") \
1019 \
1020 develop(bool, UseFakeTimers, false, \
1021 "Tell whether the VM should use system time or a fake timer") \
1022 \
1023 product(ccstr, NativeMemoryTracking, "off", \
1024 "Native memory tracking options") \
1025 \
1026 diagnostic(bool, PrintNMTStatistics, false, \
1027 "Print native memory tracking summary data if it is on") \
1028 \
1029 diagnostic(bool, LogCompilation, false, \
1030 "Log compilation activity in detail to LogFile") \
1031 \
1032 product(bool, PrintCompilation, false, \
1033 "Print compilations") \
1034 \
1035 diagnostic(bool, TraceNMethodInstalls, false, \
1036 "Trace nmethod installation") \
1037 \
1038 diagnostic(intx, ScavengeRootsInCode, 2, \
1039 "0: do not allow scavengable oops in the code cache; " \
1040 "1: allow scavenging from the code cache; " \
1041 "2: emit as many constants as the compiler can see") \
1042 range(0, 2) \
1043 \
1044 product(bool, AlwaysRestoreFPU, false, \
1045 "Restore the FPU control word after every JNI call (expensive)") \
1046 \
1047 diagnostic(bool, PrintCompilation2, false, \
1048 "Print additional statistics per compilation") \
1049 \
1050 diagnostic(bool, PrintAdapterHandlers, false, \
1051 "Print code generated for i2c/c2i adapters") \
1052 \
1053 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \
1054 "Verify that i2c/c2i adapters are called properly") \
1055 \
1056 develop(bool, VerifyAdapterSharing, false, \
1057 "Verify that the code for shared adapters is the equivalent") \
1058 \
1059 diagnostic(bool, PrintAssembly, false, \
1060 "Print assembly code (using external disassembler.so)") \
1061 \
1062 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
1063 "Print options string passed to disassembler.so") \
1064 \
1065 diagnostic(bool, PrintNMethods, false, \
1066 "Print assembly code for nmethods when generated") \
1067 \
1068 diagnostic(bool, PrintNativeNMethods, false, \
1069 "Print assembly code for native nmethods when generated") \
1070 \
1071 develop(bool, PrintDebugInfo, false, \
1072 "Print debug information for all nmethods when generated") \
1073 \
1074 develop(bool, PrintRelocations, false, \
1075 "Print relocation information for all nmethods when generated") \
1076 \
1077 develop(bool, PrintDependencies, false, \
1078 "Print dependency information for all nmethods when generated") \
1079 \
1080 develop(bool, PrintExceptionHandlers, false, \
1081 "Print exception handler tables for all nmethods when generated") \
1082 \
1083 develop(bool, StressCompiledExceptionHandlers, false, \
1084 "Exercise compiled exception handlers") \
1085 \
1086 develop(bool, InterceptOSException, false, \
1087 "Start debugger when an implicit OS (e.g. NULL) " \
1088 "exception happens") \
1089 \
1090 product(bool, PrintCodeCache, false, \
1091 "Print the code cache memory usage when exiting") \
1092 \
1093 develop(bool, PrintCodeCache2, false, \
1094 "Print detailed usage information on the code cache when exiting")\
1095 \
1096 product(bool, PrintCodeCacheOnCompilation, false, \
1097 "Print the code cache memory usage each time a method is " \
1098 "compiled") \
1099 \
1100 diagnostic(bool, PrintStubCode, false, \
1101 "Print generated stub code") \
1102 \
1103 product(bool, StackTraceInThrowable, true, \
1104 "Collect backtrace in throwable when exception happens") \
1105 \
1106 product(bool, OmitStackTraceInFastThrow, true, \
1107 "Omit backtraces for some 'hot' exceptions in optimized code") \
1108 \
1109 product(bool, ProfilerPrintByteCodeStatistics, false, \
1110 "Print bytecode statistics when dumping profiler output") \
1111 \
1112 product(bool, ProfilerRecordPC, false, \
1113 "Collect ticks for each 16 byte interval of compiled code") \
1114 \
1115 product(bool, ProfileVM, false, \
1116 "Profile ticks that fall within VM (either in the VM Thread " \
1117 "or VM code called through stubs)") \
1118 \
1119 product(bool, ProfileIntervals, false, \
1120 "Print profiles for each interval (see ProfileIntervalsTicks)") \
1121 \
1122 notproduct(bool, ProfilerCheckIntervals, false, \
1123 "Collect and print information on spacing of profiler ticks") \
1124 \
1125 product(bool, PrintWarnings, true, \
1126 "Print JVM warnings to output stream") \
1127 \
1128 notproduct(uintx, WarnOnStalledSpinLock, 0, \
1129 "Print warnings for stalled SpinLocks") \
1130 \
1131 product(bool, RegisterFinalizersAtInit, true, \
1132 "Register finalizable objects at end of Object.<init> or " \
1133 "after allocation") \
1134 \
1135 develop(bool, RegisterReferences, true, \
1136 "Tell whether the VM should register soft/weak/final/phantom " \
1137 "references") \
1138 \
1139 develop(bool, IgnoreRewrites, false, \
1140 "Suppress rewrites of bytecodes in the oopmap generator. " \
1141 "This is unsafe!") \
1142 \
1143 develop(bool, PrintCodeCacheExtension, false, \
1144 "Print extension of code cache") \
1145 \
1146 develop(bool, UsePrivilegedStack, true, \
1147 "Enable the security JVM functions") \
1148 \
1149 develop(bool, ProtectionDomainVerification, true, \
1150 "Verify protection domain before resolution in system dictionary")\
1151 \
1152 product(bool, ClassUnloading, true, \
1153 "Do unloading of classes") \
1154 \
1155 product(bool, ClassUnloadingWithConcurrentMark, true, \
1156 "Do unloading of classes with a concurrent marking cycle") \
1157 \
1158 develop(bool, DisableStartThread, false, \
1159 "Disable starting of additional Java threads " \
1160 "(for debugging only)") \
1161 \
1162 develop(bool, MemProfiling, false, \
1163 "Write memory usage profiling to log file") \
1164 \
1165 notproduct(bool, PrintSystemDictionaryAtExit, false, \
1166 "Print the system dictionary at exit") \
1167 \
1168 experimental(intx, PredictedLoadedClassCount, 0, \
1169 "Experimental: Tune loaded class cache starting size") \
1170 \
1171 diagnostic(bool, UnsyncloadClass, false, \
1172 "Unstable: VM calls loadClass unsynchronized. Custom " \
1173 "class loader must call VM synchronized for findClass " \
1174 "and defineClass.") \
1175 \
1176 product(bool, AlwaysLockClassLoader, false, \
1177 "Require the VM to acquire the class loader lock before calling " \
1178 "loadClass() even for class loaders registering " \
1179 "as parallel capable") \
1180 \
1181 product(bool, AllowParallelDefineClass, false, \
1182 "Allow parallel defineClass requests for class loaders " \
1183 "registering as parallel capable") \
1184 \
1185 product(bool, MustCallLoadClassInternal, false, \
1186 "Call loadClassInternal() rather than loadClass()") \
1187 \
1188 product_pd(bool, DontYieldALot, \
1189 "Throw away obvious excess yield calls") \
1190 \
1191 product_pd(bool, ConvertSleepToYield, \
1192 "Convert sleep(0) to thread yield " \
1193 "(may be off for Solaris to improve GUI)") \
1194 \
1195 product(bool, ConvertYieldToSleep, false, \
1196 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
1197 "behavior") \
1198 \
1199 develop(bool, UseDetachedThreads, true, \
1200 "Use detached threads that are recycled upon termination " \
1201 "(for Solaris only)") \
1202 \
1203 product(bool, UseLWPSynchronization, true, \
1204 "Use LWP-based instead of libthread-based synchronization " \
1205 "(SPARC only)") \
1206 \
1207 experimental(ccstr, SyncKnobs, NULL, \
1208 "(Unstable) Various monitor synchronization tunables") \
1209 \
1210 experimental(intx, EmitSync, 0, \
1211 "(Unsafe, Unstable) " \
1212 "Control emission of inline sync fast-path code") \
1213 \
1214 product(intx, MonitorBound, 0, "Bound Monitor population") \
1215 \
1216 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
1217 \
1218 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \
1219 "Experimental Sync flags") \
1220 \
1221 experimental(intx, SyncVerbose, 0, "(Unstable)") \
1222 \
1223 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \
1224 \
1225 experimental(intx, hashCode, 5, \
1226 "(Unstable) select hashCode generation algorithm") \
1227 \
1228 experimental(intx, WorkAroundNPTLTimedWaitHang, 1, \
1229 "(Unstable, Linux-specific) " \
1230 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \
1231 \
1232 product(bool, FilterSpuriousWakeups, true, \
1233 "When true prevents OS-level spurious, or premature, wakeups " \
1234 "from Object.wait (Ignored for Windows)") \
1235 \
1236 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \
1237 \
1238 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \
1239 \
1240 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \
1241 \
1242 develop(bool, UsePthreads, false, \
1243 "Use pthread-based instead of libthread-based synchronization " \
1244 "(SPARC only)") \
1245 \
1246 product(bool, ReduceSignalUsage, false, \
1247 "Reduce the use of OS signals in Java and/or the VM") \
1248 \
1249 develop_pd(bool, ShareVtableStubs, \
1250 "Share vtable stubs (smaller code but worse branch prediction") \
1251 \
1252 develop(bool, LoadLineNumberTables, true, \
1253 "Tell whether the class file parser loads line number tables") \
1254 \
1255 develop(bool, LoadLocalVariableTables, true, \
1256 "Tell whether the class file parser loads local variable tables") \
1257 \
1258 develop(bool, LoadLocalVariableTypeTables, true, \
1259 "Tell whether the class file parser loads local variable type" \
1260 "tables") \
1261 \
1262 product(bool, AllowUserSignalHandlers, false, \
1263 "Do not complain if the application installs signal handlers " \
1264 "(Solaris & Linux only)") \
1265 \
1266 product(bool, UseSignalChaining, true, \
1267 "Use signal-chaining to invoke signal handlers installed " \
1268 "by the application (Solaris & Linux only)") \
1269 \
1270 product(bool, UseAltSigs, false, \
1271 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
1272 "internal signals (Solaris only)") \
1273 \
1274 product(bool, AllowJNIEnvProxy, false, \
1275 "Allow JNIEnv proxies for jdbx") \
1276 \
1277 product(bool, JNIDetachReleasesMonitors, true, \
1278 "JNI DetachCurrentThread releases monitors owned by thread") \
1279 \
1280 product(bool, RestoreMXCSROnJNICalls, false, \
1281 "Restore MXCSR when returning from JNI calls") \
1282 \
1283 product(bool, CheckJNICalls, false, \
1284 "Verify all arguments to JNI calls") \
1285 \
1286 product(bool, CheckEndorsedAndExtDirs, false, \
1287 "Verify the endorsed and extension directories are not used") \
1288 \
1289 product(bool, UseFastJNIAccessors, true, \
1290 "Use optimized versions of Get<Primitive>Field") \
1291 \
1292 product(intx, MaxJNILocalCapacity, 65536, \
1293 "Maximum allowable local JNI handle capacity to " \
1294 "EnsureLocalCapacity() and PushLocalFrame(), " \
1295 "where <= 0 is unlimited, default: 65536") \
1296 \
1297 product(bool, EagerXrunInit, false, \
1298 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1299 "but not all -Xrun libraries may support the state of the VM " \
1300 "at this time") \
1301 \
1302 product(bool, PreserveAllAnnotations, false, \
1303 "Preserve RuntimeInvisibleAnnotations as well " \
1304 "as RuntimeVisibleAnnotations") \
1305 \
1306 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1307 "Number of OutOfMemoryErrors preallocated with backtrace") \
1308 \
1309 product(bool, LazyBootClassLoader, true, \
1310 "Enable/disable lazy opening of boot class path entries") \
1311 \
1312 product(bool, UseXMMForArrayCopy, false, \
1313 "Use SSE2 MOVQ instruction for Arraycopy") \
1314 \
1315 product(intx, FieldsAllocationStyle, 1, \
1316 "0 - type based with oops first, " \
1317 "1 - with oops last, " \
1318 "2 - oops in super and sub classes are together") \
1319 range(0, 2) \
1320 \
1321 product(bool, CompactFields, true, \
1322 "Allocate nonstatic fields in gaps between previous fields") \
1323 \
1324 notproduct(bool, PrintFieldLayout, false, \
1325 "Print field layout for each class") \
1326 \
1327 /* Need to limit the extent of the padding to reasonable size. */\
1328 /* 8K is well beyond the reasonable HW cache line size, even with */\
1329 /* aggressive prefetching, while still leaving the room for segregating */\
1330 /* among the distinct pages. */\
1331 product(intx, ContendedPaddingWidth, 128, \
1332 "How many bytes to pad the fields/classes marked @Contended with")\
1333 range(0, 8192) \
1334 constraint(ContendedPaddingWidthConstraintFunc) \
1335 \
1336 product(bool, EnableContended, true, \
1337 "Enable @Contended annotation support") \
1338 \
1339 product(bool, RestrictContended, true, \
1340 "Restrict @Contended to trusted classes") \
1341 \
1342 product(bool, UseBiasedLocking, true, \
1343 "Enable biased locking in JVM") \
1344 \
1345 product(intx, BiasedLockingStartupDelay, 4000, \
1346 "Number of milliseconds to wait before enabling biased locking") \
1347 \
1348 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1349 "Print statistics of biased locking in JVM") \
1350 \
1351 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1352 "Threshold of number of revocations per type to try to " \
1353 "rebias all objects in the heap of that type") \
1354 \
1355 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1356 "Threshold of number of revocations per type to permanently " \
1357 "revoke biases of all objects in the heap of that type") \
1358 \
1359 product(intx, BiasedLockingDecayTime, 25000, \
1360 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1361 "type after previous bulk rebias") \
1362 \
1363 /* tracing */ \
1364 \
1365 notproduct(bool, TraceRuntimeCalls, false, \
1366 "Trace run-time calls") \
1367 \
1368 develop(bool, TraceJNICalls, false, \
1369 "Trace JNI calls") \
1370 \
1371 develop(bool, StressRewriter, false, \
1372 "Stress linktime bytecode rewriting") \
1373 \
1374 notproduct(bool, TraceJVMCalls, false, \
1375 "Trace JVM calls") \
1376 \
1377 product(ccstr, TraceJVMTI, NULL, \
1378 "Trace flags for JVMTI functions and events") \
1379 \
1380 /* This option can change an EMCP method into an obsolete method. */ \
1381 /* This can affect tests that except specific methods to be EMCP. */ \
1382 /* This option should be used with caution. */ \
1383 product(bool, StressLdcRewrite, false, \
1384 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1385 \
1386 product(intx, TraceRedefineClasses, 0, \
1387 "Trace level for JVMTI RedefineClasses") \
1388 \
1389 /* change to false by default sometime after Mustang */ \
1390 product(bool, VerifyMergedCPBytecodes, true, \
1391 "Verify bytecodes after RedefineClasses constant pool merging") \
1392 \
1393 develop(bool, TraceJNIHandleAllocation, false, \
1394 "Trace allocation/deallocation of JNI handle blocks") \
1395 \
1396 develop(bool, TraceBytecodes, false, \
1397 "Trace bytecode execution") \
1398 \
1399 develop(bool, TraceClassInitialization, false, \
1400 "Trace class initialization") \
1401 \
1402 product(bool, TraceExceptions, false, \
1403 "Trace exceptions") \
1404 \
1405 develop(bool, TraceICs, false, \
1406 "Trace inline cache changes") \
1407 \
1408 notproduct(bool, TraceInvocationCounterOverflow, false, \
1409 "Trace method invocation counter overflow") \
1410 \
1411 develop(bool, TraceInlineCacheClearing, false, \
1412 "Trace clearing of inline caches in nmethods") \
1413 \
1414 develop(bool, TraceDependencies, false, \
1415 "Trace dependencies") \
1416 \
1417 develop(bool, VerifyDependencies, trueInDebug, \
1418 "Exercise and verify the compilation dependency mechanism") \
1419 \
1420 develop(bool, TraceNewOopMapGeneration, false, \
1421 "Trace OopMapGeneration") \
1422 \
1423 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1424 "Trace OopMapGeneration: print detailed cell states") \
1425 \
1426 develop(bool, TimeOopMap, false, \
1427 "Time calls to GenerateOopMap::compute_map() in sum") \
1428 \
1429 develop(bool, TimeOopMap2, false, \
1430 "Time calls to GenerateOopMap::compute_map() individually") \
1431 \
1432 develop(bool, TraceMonitorMismatch, false, \
1433 "Trace monitor matching failures during OopMapGeneration") \
1434 \
1435 develop(bool, TraceOopMapRewrites, false, \
1436 "Trace rewriting of method oops during oop map generation") \
1437 \
1438 develop(bool, TraceSafepoint, false, \
1439 "Trace safepoint operations") \
1440 \
1441 develop(bool, TraceICBuffer, false, \
1442 "Trace usage of IC buffer") \
1443 \
1444 develop(bool, TraceCompiledIC, false, \
1445 "Trace changes of compiled IC") \
1446 \
1447 notproduct(bool, TraceZapDeadLocals, false, \
1448 "Trace zapping dead locals") \
1449 \
1450 develop(bool, TraceStartupTime, false, \
1451 "Trace setup time") \
1452 \
1453 develop(bool, TraceProtectionDomainVerification, false, \
1454 "Trace protection domain verification") \
1455 \
1456 develop(bool, TraceClearedExceptions, false, \
1457 "Print when an exception is forcibly cleared") \
1458 \
1459 product(bool, TraceClassResolution, false, \
1460 "Trace all constant pool resolutions (for debugging)") \
1461 \
1462 product(bool, TraceBiasedLocking, false, \
1463 "Trace biased locking in JVM") \
1464 \
1465 product(bool, TraceMonitorInflation, false, \
1466 "Trace monitor inflation in JVM") \
1467 \
1468 /* gc */ \
1469 \
1470 product(bool, UseSerialGC, false, \
1471 "Use the Serial garbage collector") \
1472 \
1473 product(bool, UseG1GC, false, \
1474 "Use the Garbage-First garbage collector") \
1475 \
1476 product(bool, UseParallelGC, false, \
1477 "Use the Parallel Scavenge garbage collector") \
1478 \
1479 product(bool, UseParallelOldGC, false, \
1480 "Use the Parallel Old garbage collector") \
1481 \
1482 product(uintx, HeapMaximumCompactionInterval, 20, \
1483 "How often should we maximally compact the heap (not allowing " \
1484 "any dead space)") \
1485 \
1486 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1487 "The collection count for the first maximum compaction") \
1488 \
1489 product(bool, UseMaximumCompactionOnSystemGC, true, \
1490 "Use maximum compaction in the Parallel Old garbage collector " \
1491 "for a system GC") \
1492 \
1493 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1494 "The mean used by the parallel compact dead wood " \
1495 "limiter (a number between 0-100)") \
1496 range(0, 100) \
1497 \
1498 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1499 "The standard deviation used by the parallel compact dead wood " \
1500 "limiter (a number between 0-100)") \
1501 range(0, 100) \
1502 \
1503 product(uintx, ParallelGCThreads, 0, \
1504 "Number of parallel threads parallel gc will use") \
1505 \
1506 product(bool, UseDynamicNumberOfGCThreads, false, \
1507 "Dynamically choose the number of parallel threads " \
1508 "parallel gc will use") \
1509 \
1510 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
1511 "Force dynamic selection of the number of " \
1512 "parallel threads parallel gc will use to aid debugging") \
1513 \
1514 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \
1515 "Size of heap (bytes) per GC thread used in calculating the " \
1516 "number of GC threads") \
1517 range((uintx)os::vm_page_size(), max_uintx) \
1518 \
1519 product(bool, TraceDynamicGCThreads, false, \
1520 "Trace the dynamic GC thread usage") \
1521 \
1522 develop(bool, ParallelOldGCSplitALot, false, \
1523 "Provoke splitting (copying data from a young gen space to " \
1524 "multiple destination spaces)") \
1525 \
1526 develop(uintx, ParallelOldGCSplitInterval, 3, \
1527 "How often to provoke splitting a young gen space") \
1528 range(0, max_uintx) \
1529 \
1530 product(uintx, ConcGCThreads, 0, \
1531 "Number of threads concurrent gc will use") \
1532 \
1533 product(size_t, YoungPLABSize, 4096, \
1534 "Size of young gen promotion LAB's (in HeapWords)") \
1535 \
1536 product(size_t, OldPLABSize, 1024, \
1537 "Size of old gen promotion LAB's (in HeapWords), or Number \
1538 of blocks to attempt to claim when refilling CMS LAB's") \
1539 \
1540 product(uintx, GCTaskTimeStampEntries, 200, \
1541 "Number of time stamp entries per gc worker thread") \
1542 range(1, max_uintx) \
1543 \
1544 product(bool, AlwaysTenure, false, \
1545 "Always tenure objects in eden (ParallelGC only)") \
1546 \
1547 product(bool, NeverTenure, false, \
1548 "Never tenure objects in eden, may tenure on overflow " \
1549 "(ParallelGC only)") \
1550 \
1551 product(bool, ScavengeBeforeFullGC, true, \
1552 "Scavenge youngest generation before each full GC.") \
1553 \
1554 develop(bool, ScavengeWithObjectsInToSpace, false, \
1555 "Allow scavenges to occur when to-space contains objects") \
1556 \
1557 product(bool, UseConcMarkSweepGC, false, \
1558 "Use Concurrent Mark-Sweep GC in the old generation") \
1559 \
1560 product(bool, ExplicitGCInvokesConcurrent, false, \
1561 "A System.gc() request invokes a concurrent collection; " \
1562 "(effective only when using concurrent collectors)") \
1563 \
1564 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1565 "A System.gc() request invokes a concurrent collection and " \
1566 "also unloads classes during such a concurrent gc cycle " \
1567 "(effective only when UseConcMarkSweepGC)") \
1568 \
1569 product(bool, GCLockerInvokesConcurrent, false, \
1570 "The exit of a JNI critical section necessitating a scavenge, " \
1571 "also kicks off a background concurrent collection") \
1572 \
1573 product(uintx, GCLockerEdenExpansionPercent, 5, \
1574 "How much the GC can expand the eden by while the GC locker " \
1575 "is active (as a percentage)") \
1576 range(0, 100) \
1577 \
1578 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \
1579 "Number of times to retry allocations when " \
1580 "blocked by the GC locker") \
1581 \
1582 develop(bool, UseCMSAdaptiveFreeLists, true, \
1583 "Use adaptive free lists in the CMS generation") \
1584 \
1585 develop(bool, UseAsyncConcMarkSweepGC, true, \
1586 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1587 \
1588 product(bool, UseCMSBestFit, true, \
1589 "Use CMS best fit allocation strategy") \
1590 \
1591 product(bool, UseParNewGC, false, \
1592 "Use parallel threads in the new generation") \
1593 \
1594 product(bool, PrintTaskqueue, false, \
1595 "Print taskqueue statistics for parallel collectors") \
1596 \
1597 product(bool, PrintTerminationStats, false, \
1598 "Print termination statistics for parallel collectors") \
1599 \
1600 product(uintx, ParallelGCBufferWastePct, 10, \
1601 "Wasted fraction of parallel allocation buffer") \
1602 range(0, 100) \
1603 \
1604 product(uintx, TargetPLABWastePct, 10, \
1605 "Target wasted space in last buffer as percent of overall " \
1606 "allocation") \
1607 range(1, 100) \
1608 \
1609 product(uintx, PLABWeight, 75, \
1610 "Percentage (0-100) used to weight the current sample when " \
1611 "computing exponentially decaying average for ResizePLAB") \
1612 range(0, 100) \
1613 \
1614 product(bool, ResizePLAB, true, \
1615 "Dynamically resize (survivor space) promotion LAB's") \
1616 \
1617 product(bool, PrintPLAB, false, \
1618 "Print (survivor space) promotion LAB's sizing decisions") \
1619 \
1620 product(intx, ParGCArrayScanChunk, 50, \
1621 "Scan a subset of object array and push remainder, if array is " \
1622 "bigger than this") \
1623 range(1, max_intx) \
1624 \
1625 product(bool, ParGCUseLocalOverflow, false, \
1626 "Instead of a global overflow list, use local overflow stacks") \
1627 \
1628 product(bool, ParGCTrimOverflow, true, \
1629 "Eagerly trim the local overflow lists " \
1630 "(when ParGCUseLocalOverflow)") \
1631 \
1632 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1633 "Simulate work queue overflow in ParNew") \
1634 \
1635 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1636 "An `interval' counter that determines how frequently " \
1637 "we simulate overflow; a smaller number increases frequency") \
1638 \
1639 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1640 "The desired number of objects to claim from the overflow list") \
1641 \
1642 diagnostic(uintx, ParGCStridesPerThread, 2, \
1643 "The number of strides per worker thread that we divide up the " \
1644 "card table scanning work into") \
1645 range(1, max_uintx) \
1646 \
1647 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
1648 "The number of cards in each chunk of the parallel chunks used " \
1649 "during card table scanning") \
1650 range(1, max_intx) \
1651 \
1652 product(uintx, OldPLABWeight, 50, \
1653 "Percentage (0-100) used to weight the current sample when " \
1654 "computing exponentially decaying average for resizing " \
1655 "OldPLABSize") \
1656 range(0, 100) \
1657 \
1658 product(bool, ResizeOldPLAB, true, \
1659 "Dynamically resize (old gen) promotion LAB's") \
1660 \
1661 product(bool, PrintOldPLAB, false, \
1662 "Print (old gen) promotion LAB's sizing decisions") \
1663 \
1664 product(size_t, CMSOldPLABMax, 1024, \
1665 "Maximum size of CMS gen promotion LAB caches per worker " \
1666 "per block size") \
1667 range(1, max_uintx) \
1668 constraint(CMSOldPLABMaxConstraintFunc) \
1669 \
1670 product(size_t, CMSOldPLABMin, 16, \
1671 "Minimum size of CMS gen promotion LAB caches per worker " \
1672 "per block size") \
1673 range(1, max_uintx) \
1674 constraint(CMSOldPLABMinConstraintFunc) \
1675 \
1676 product(uintx, CMSOldPLABNumRefills, 4, \
1677 "Nominal number of refills of CMS gen promotion LAB cache " \
1678 "per worker per block size") \
1679 range(1, max_uintx) \
1680 \
1681 product(bool, CMSOldPLABResizeQuicker, false, \
1682 "React on-the-fly during a scavenge to a sudden " \
1683 "change in block demand rate") \
1684 \
1685 product(uintx, CMSOldPLABToleranceFactor, 4, \
1686 "The tolerance of the phase-change detector for on-the-fly " \
1687 "PLAB resizing during a scavenge") \
1688 range(1, max_uintx) \
1689 \
1690 product(uintx, CMSOldPLABReactivityFactor, 2, \
1691 "The gain in the feedback loop for on-the-fly PLAB resizing " \
1692 "during a scavenge") \
1693 \
1694 product(bool, AlwaysPreTouch, false, \
1695 "Force all freshly committed pages to be pre-touched") \
1696 \
1697 product_pd(size_t, CMSYoungGenPerWorker, \
1698 "The maximum size of young gen chosen by default per GC worker " \
1699 "thread available") \
1700 range(1, max_uintx) \
1701 \
1702 product(uintx, CMSIncrementalSafetyFactor, 10, \
1703 "Percentage (0-100) used to add conservatism when computing the " \
1704 "duty cycle") \
1705 range(0, 100) \
1706 \
1707 product(uintx, CMSExpAvgFactor, 50, \
1708 "Percentage (0-100) used to weight the current sample when " \
1709 "computing exponential averages for CMS statistics") \
1710 range(0, 100) \
1711 \
1712 product(uintx, CMS_FLSWeight, 75, \
1713 "Percentage (0-100) used to weight the current sample when " \
1714 "computing exponentially decaying averages for CMS FLS " \
1715 "statistics") \
1716 range(0, 100) \
1717 \
1718 product(uintx, CMS_FLSPadding, 1, \
1719 "The multiple of deviation from mean to use for buffering " \
1720 "against volatility in free list demand") \
1721 \
1722 product(uintx, FLSCoalescePolicy, 2, \
1723 "CMS: aggressiveness level for coalescing, increasing " \
1724 "from 0 to 4") \
1725 range(0, 4) \
1726 \
1727 product(bool, FLSAlwaysCoalesceLarge, false, \
1728 "CMS: larger free blocks are always available for coalescing") \
1729 \
1730 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1731 "CMS: the smaller the percentage the greater the coalescing " \
1732 "force") \
1733 \
1734 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1735 "CMS: the factor by which to inflate estimated demand of small " \
1736 "block sizes to prevent coalescing with an adjoining block") \
1737 \
1738 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1739 "CMS: the factor by which to inflate estimated demand of large " \
1740 "block sizes to prevent coalescing with an adjoining block") \
1741 \
1742 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1743 "CMS: the factor by which to inflate estimated demand of small " \
1744 "block sizes to prevent splitting to supply demand for smaller " \
1745 "blocks") \
1746 \
1747 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1748 "CMS: the factor by which to inflate estimated demand of large " \
1749 "block sizes to prevent splitting to supply demand for smaller " \
1750 "blocks") \
1751 \
1752 product(bool, CMSExtrapolateSweep, false, \
1753 "CMS: cushion for block demand during sweep") \
1754 \
1755 product(uintx, CMS_SweepWeight, 75, \
1756 "Percentage (0-100) used to weight the current sample when " \
1757 "computing exponentially decaying average for inter-sweep " \
1758 "duration") \
1759 range(0, 100) \
1760 \
1761 product(uintx, CMS_SweepPadding, 1, \
1762 "The multiple of deviation from mean to use for buffering " \
1763 "against volatility in inter-sweep duration") \
1764 \
1765 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1766 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1767 "duration exceeds this threshold in milliseconds") \
1768 \
1769 product(bool, CMSClassUnloadingEnabled, true, \
1770 "Whether class unloading enabled when using CMS GC") \
1771 \
1772 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1773 "When CMS class unloading is enabled, the maximum CMS cycle " \
1774 "count for which classes may not be unloaded") \
1775 \
1776 develop(intx, CMSDictionaryChoice, 0, \
1777 "Use BinaryTreeDictionary as default in the CMS generation") \
1778 \
1779 product(uintx, CMSIndexedFreeListReplenish, 4, \
1780 "Replenish an indexed free list with this number of chunks") \
1781 \
1782 product(bool, CMSReplenishIntermediate, true, \
1783 "Replenish all intermediate free-list caches") \
1784 \
1785 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1786 "When satisfying batched demand, split blocks from the " \
1787 "IndexedFreeList whose size is a multiple of requested size") \
1788 \
1789 product(bool, CMSLoopWarn, false, \
1790 "Warn in case of excessive CMS looping") \
1791 \
1792 develop(bool, CMSOverflowEarlyRestoration, false, \
1793 "Restore preserved marks early") \
1794 \
1795 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1796 "Size of marking stack") \
1797 \
1798 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1799 "Maximum size of marking stack") \
1800 range(1, (max_jint - 1)) \
1801 \
1802 notproduct(bool, CMSMarkStackOverflowALot, false, \
1803 "Simulate frequent marking stack / work queue overflow") \
1804 \
1805 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1806 "An \"interval\" counter that determines how frequently " \
1807 "to simulate overflow; a smaller number increases frequency") \
1808 \
1809 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1810 "Maximum number of abortable preclean iterations, if > 0") \
1811 \
1812 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1813 "Maximum time in abortable preclean (in milliseconds)") \
1814 \
1815 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1816 "Nominal minimum work per abortable preclean iteration") \
1817 \
1818 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
1819 "Time that we sleep between iterations when not given " \
1820 "enough work per iteration") \
1821 \
1822 product(size_t, CMSRescanMultiple, 32, \
1823 "Size (in cards) of CMS parallel rescan task") \
1824 range(1, max_uintx) \
1825 \
1826 product(size_t, CMSConcMarkMultiple, 32, \
1827 "Size (in cards) of CMS concurrent MT marking task") \
1828 range(1, max_uintx) \
1829 \
1830 product(bool, CMSAbortSemantics, false, \
1831 "Whether abort-on-overflow semantics is implemented") \
1832 \
1833 product(bool, CMSParallelInitialMarkEnabled, true, \
1834 "Use the parallel initial mark.") \
1835 \
1836 product(bool, CMSParallelRemarkEnabled, true, \
1837 "Whether parallel remark enabled (only if ParNewGC)") \
1838 \
1839 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1840 "Whether parallel remark of survivor space " \
1841 "enabled (effective only if CMSParallelRemarkEnabled)") \
1842 \
1843 product(bool, CMSPLABRecordAlways, true, \
1844 "Always record survivor space PLAB boundaries (effective only " \
1845 "if CMSParallelSurvivorRemarkEnabled)") \
1846 \
1847 product(bool, CMSEdenChunksRecordAlways, true, \
1848 "Always record eden chunks used for the parallel initial mark " \
1849 "or remark of eden") \
1850 \
1851 product(bool, CMSPrintEdenSurvivorChunks, false, \
1852 "Print the eden and the survivor chunks used for the parallel " \
1853 "initial mark or remark of the eden/survivor spaces") \
1854 \
1855 product(bool, CMSConcurrentMTEnabled, true, \
1856 "Whether multi-threaded concurrent work enabled " \
1857 "(effective only if ParNewGC)") \
1858 \
1859 product(bool, CMSPrecleaningEnabled, true, \
1860 "Whether concurrent precleaning enabled") \
1861 \
1862 product(uintx, CMSPrecleanIter, 3, \
1863 "Maximum number of precleaning iteration passes") \
1864 range(0, 9) \
1865 \
1866 product(uintx, CMSPrecleanDenominator, 3, \
1867 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1868 "ratio") \
1869 range(1, max_uintx) \
1870 constraint(CMSPrecleanDenominatorConstraintFunc) \
1871 \
1872 product(uintx, CMSPrecleanNumerator, 2, \
1873 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1874 "ratio") \
1875 range(0, max_uintx-1) \
1876 constraint(CMSPrecleanNumeratorConstraintFunc) \
1877 \
1878 product(bool, CMSPrecleanRefLists1, true, \
1879 "Preclean ref lists during (initial) preclean phase") \
1880 \
1881 product(bool, CMSPrecleanRefLists2, false, \
1882 "Preclean ref lists during abortable preclean phase") \
1883 \
1884 product(bool, CMSPrecleanSurvivors1, false, \
1885 "Preclean survivors during (initial) preclean phase") \
1886 \
1887 product(bool, CMSPrecleanSurvivors2, true, \
1888 "Preclean survivors during abortable preclean phase") \
1889 \
1890 product(uintx, CMSPrecleanThreshold, 1000, \
1891 "Do not iterate again if number of dirty cards is less than this")\
1892 range(100, max_uintx) \
1893 \
1894 product(bool, CMSCleanOnEnter, true, \
1895 "Clean-on-enter optimization for reducing number of dirty cards") \
1896 \
1897 product(uintx, CMSRemarkVerifyVariant, 1, \
1898 "Choose variant (1,2) of verification following remark") \
1899 range(1, 2) \
1900 \
1901 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1902 "If Eden size is below this, do not try to schedule remark") \
1903 \
1904 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1905 "The Eden occupancy percentage (0-100) at which " \
1906 "to try and schedule remark pause") \
1907 range(0, 100) \
1908 \
1909 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1910 "Start sampling eden top at least before young gen " \
1911 "occupancy reaches 1/<ratio> of the size at which " \
1912 "we plan to schedule remark") \
1913 range(1, max_uintx) \
1914 \
1915 product(uintx, CMSSamplingGrain, 16*K, \
1916 "The minimum distance between eden samples for CMS (see above)") \
1917 range(1, max_uintx) \
1918 \
1919 product(bool, CMSScavengeBeforeRemark, false, \
1920 "Attempt scavenge before the CMS remark step") \
1921 \
1922 develop(bool, CMSTraceSweeper, false, \
1923 "Trace some actions of the CMS sweeper") \
1924 \
1925 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1926 "Don't drain below this size per parallel worker/thief") \
1927 \
1928 manageable(intx, CMSWaitDuration, 2000, \
1929 "Time in milliseconds that CMS thread waits for young GC") \
1930 \
1931 develop(uintx, CMSCheckInterval, 1000, \
1932 "Interval in milliseconds that CMS thread checks if it " \
1933 "should start a collection cycle") \
1934 \
1935 product(bool, CMSYield, true, \
1936 "Yield between steps of CMS") \
1937 \
1938 product(size_t, CMSBitMapYieldQuantum, 10*M, \
1939 "Bitmap operations should process at most this many bits " \
1940 "between yields") \
1941 range(1, max_uintx) \
1942 \
1943 product(bool, CMSDumpAtPromotionFailure, false, \
1944 "Dump useful information about the state of the CMS old " \
1945 "generation upon a promotion failure") \
1946 \
1947 product(bool, CMSPrintChunksInDump, false, \
1948 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1949 "more detailed information about the free chunks") \
1950 \
1951 product(bool, CMSPrintObjectsInDump, false, \
1952 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1953 "more detailed information about the allocated objects") \
1954 \
1955 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1956 "Verify that all references across the FLS boundary " \
1957 "are to valid objects") \
1958 \
1959 diagnostic(bool, FLSVerifyLists, false, \
1960 "Do lots of (expensive) FreeListSpace verification") \
1961 \
1962 diagnostic(bool, FLSVerifyIndexTable, false, \
1963 "Do lots of (expensive) FLS index table verification") \
1964 \
1965 develop(bool, FLSVerifyDictionary, false, \
1966 "Do lots of (expensive) FLS dictionary verification") \
1967 \
1968 develop(bool, VerifyBlockOffsetArray, false, \
1969 "Do (expensive) block offset array verification") \
1970 \
1971 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
1972 "Maintain _unallocated_block in BlockOffsetArray " \
1973 "(currently applicable only to CMS collector)") \
1974 \
1975 develop(bool, TraceCMSState, false, \
1976 "Trace the state of the CMS collection") \
1977 \
1978 product(intx, RefDiscoveryPolicy, 0, \
1979 "Select type of reference discovery policy: " \
1980 "reference-based(0) or referent-based(1)") \
1981 range(ReferenceProcessor::DiscoveryPolicyMin, \
1982 ReferenceProcessor::DiscoveryPolicyMax) \
1983 \
1984 product(bool, ParallelRefProcEnabled, false, \
1985 "Enable parallel reference processing whenever possible") \
1986 \
1987 product(bool, ParallelRefProcBalancingEnabled, true, \
1988 "Enable balancing of reference processing queues") \
1989 \
1990 product(uintx, CMSTriggerRatio, 80, \
1991 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1992 "allocated before a CMS collection cycle commences") \
1993 range(0, 100) \
1994 \
1995 product(uintx, CMSBootstrapOccupancy, 50, \
1996 "Percentage CMS generation occupancy at which to " \
1997 "initiate CMS collection for bootstrapping collection stats") \
1998 range(0, 100) \
1999 \
2000 product(intx, CMSInitiatingOccupancyFraction, -1, \
2001 "Percentage CMS generation occupancy to start a CMS collection " \
2002 "cycle. A negative value means that CMSTriggerRatio is used") \
2003 range(min_intx, 100) \
2004 \
2005 product(uintx, InitiatingHeapOccupancyPercent, 45, \
2006 "Percentage of the (entire) heap occupancy to start a " \
2007 "concurrent GC cycle. It is used by GCs that trigger a " \
2008 "concurrent GC cycle based on the occupancy of the entire heap, " \
2009 "not just one of the generations (e.g., G1). A value of 0 " \
2010 "denotes 'do constant GC cycles'.") \
2011 range(0, 100) \
2012 \
2013 manageable(intx, CMSTriggerInterval, -1, \
2014 "Commence a CMS collection cycle (at least) every so many " \
2015 "milliseconds (0 permanently, -1 disabled)") \
2016 range(-1, 0) \
2017 \
2018 product(bool, UseCMSInitiatingOccupancyOnly, false, \
2019 "Only use occupancy as a criterion for starting a CMS collection")\
2020 \
2021 product(uintx, CMSIsTooFullPercentage, 98, \
2022 "An absolute ceiling above which CMS will always consider the " \
2023 "unloading of classes when class unloading is enabled") \
2024 range(0, 100) \
2025 \
2026 develop(bool, CMSTestInFreeList, false, \
2027 "Check if the coalesced range is already in the " \
2028 "free lists as claimed") \
2029 \
2030 notproduct(bool, CMSVerifyReturnedBytes, false, \
2031 "Check that all the garbage collected was returned to the " \
2032 "free lists") \
2033 \
2034 notproduct(bool, ScavengeALot, false, \
2035 "Force scavenge at every Nth exit from the runtime system " \
2036 "(N=ScavengeALotInterval)") \
2037 \
2038 develop(bool, FullGCALot, false, \
2039 "Force full gc at every Nth exit from the runtime system " \
2040 "(N=FullGCALotInterval)") \
2041 \
2042 notproduct(bool, GCALotAtAllSafepoints, false, \
2043 "Enforce ScavengeALot/GCALot at all potential safepoints") \
2044 \
2045 product(bool, PrintPromotionFailure, false, \
2046 "Print additional diagnostic information following " \
2047 "promotion failure") \
2048 \
2049 notproduct(bool, PromotionFailureALot, false, \
2050 "Use promotion failure handling on every youngest generation " \
2051 "collection") \
2052 \
2053 develop(uintx, PromotionFailureALotCount, 1000, \
2054 "Number of promotion failures occurring at PLAB " \
2055 "refill attempts (ParNew) or promotion attempts " \
2056 "(other young collectors)") \
2057 \
2058 develop(uintx, PromotionFailureALotInterval, 5, \
2059 "Total collections between promotion failures a lot") \
2060 \
2061 experimental(uintx, WorkStealingSleepMillis, 1, \
2062 "Sleep time when sleep is used for yields") \
2063 \
2064 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \
2065 "Number of yields before a sleep is done during work stealing") \
2066 \
2067 experimental(uintx, WorkStealingHardSpins, 4096, \
2068 "Number of iterations in a spin loop between checks on " \
2069 "time out of hard spin") \
2070 \
2071 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \
2072 "Ratio of hard spins to calls to yield") \
2073 \
2074 develop(uintx, ObjArrayMarkingStride, 512, \
2075 "Number of object array elements to push onto the marking stack " \
2076 "before pushing a continuation entry") \
2077 \
2078 develop(bool, MetadataAllocationFailALot, false, \
2079 "Fail metadata allocations at intervals controlled by " \
2080 "MetadataAllocationFailALotInterval") \
2081 \
2082 develop(uintx, MetadataAllocationFailALotInterval, 1000, \
2083 "Metadata allocation failure a lot interval") \
2084 \
2085 develop(bool, TraceMetadataChunkAllocation, false, \
2086 "Trace chunk metadata allocations") \
2087 \
2088 product(bool, TraceMetadataHumongousAllocation, false, \
2089 "Trace humongous metadata allocations") \
2090 \
2091 develop(bool, TraceMetavirtualspaceAllocation, false, \
2092 "Trace virtual space metadata allocations") \
2093 \
2094 notproduct(bool, ExecuteInternalVMTests, false, \
2095 "Enable execution of internal VM tests") \
2096 \
2097 notproduct(bool, VerboseInternalVMTests, false, \
2098 "Turn on logging for internal VM tests.") \
2099 \
2100 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
2101 \
2102 product_pd(bool, ResizeTLAB, \
2103 "Dynamically resize TLAB size for threads") \
2104 \
2105 product(bool, ZeroTLAB, false, \
2106 "Zero out the newly created TLAB") \
2107 \
2108 product(bool, FastTLABRefill, true, \
2109 "Use fast TLAB refill code") \
2110 \
2111 product(bool, PrintTLAB, false, \
2112 "Print various TLAB related information") \
2113 \
2114 product(bool, TLABStats, true, \
2115 "Provide more detailed and expensive TLAB statistics " \
2116 "(with PrintTLAB)") \
2117 \
2118 product_pd(bool, NeverActAsServerClassMachine, \
2119 "Never act like a server-class machine") \
2120 \
2121 product(bool, AlwaysActAsServerClassMachine, false, \
2122 "Always act like a server-class machine") \
2123 \
2124 product_pd(uint64_t, MaxRAM, \
2125 "Real memory size (in bytes) used to set maximum heap size") \
2126 \
2127 product(size_t, ErgoHeapSizeLimit, 0, \
2128 "Maximum ergonomically set heap size (in bytes); zero means use " \
2129 "MaxRAM / MaxRAMFraction") \
2130 \
2131 product(uintx, MaxRAMFraction, 4, \
2132 "Maximum fraction (1/n) of real memory used for maximum heap " \
2133 "size") \
2134 range(1, max_uintx) \
2135 \
2136 product(uintx, DefaultMaxRAMFraction, 4, \
2137 "Maximum fraction (1/n) of real memory used for maximum heap " \
2138 "size; deprecated: to be renamed to MaxRAMFraction") \
2139 range(1, max_uintx) \
2140 \
2141 product(uintx, MinRAMFraction, 2, \
2142 "Minimum fraction (1/n) of real memory used for maximum heap " \
2143 "size on systems with small physical memory size") \
2144 range(1, max_uintx) \
2145 \
2146 product(uintx, InitialRAMFraction, 64, \
2147 "Fraction (1/n) of real memory used for initial heap size") \
2148 range(1, max_uintx) \
2149 \
2150 develop(uintx, MaxVirtMemFraction, 2, \
2151 "Maximum fraction (1/n) of virtual memory used for ergonomically "\
2152 "determining maximum heap size") \
2153 \
2154 product(bool, UseAutoGCSelectPolicy, false, \
2155 "Use automatic collection selection policy") \
2156 \
2157 product(uintx, AutoGCSelectPauseMillis, 5000, \
2158 "Automatic GC selection pause threshold in milliseconds") \
2159 \
2160 product(bool, UseAdaptiveSizePolicy, true, \
2161 "Use adaptive generation sizing policies") \
2162 \
2163 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
2164 "Use adaptive survivor sizing policies") \
2165 \
2166 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
2167 "Use adaptive young-old sizing policies at minor collections") \
2168 \
2169 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
2170 "Use adaptive young-old sizing policies at major collections") \
2171 \
2172 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
2173 "Include statistics from System.gc() for adaptive size policy") \
2174 \
2175 product(bool, UseAdaptiveGCBoundary, false, \
2176 "Allow young-old boundary to move") \
2177 \
2178 develop(bool, TraceAdaptiveGCBoundary, false, \
2179 "Trace young-old boundary moves") \
2180 \
2181 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
2182 "Resize the virtual spaces of the young or old generations") \
2183 \
2184 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
2185 "Policy for changing generation size for throughput goals") \
2186 \
2187 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
2188 "Adjust tenured generation to achieve a minor pause goal") \
2189 \
2190 develop(bool, PSAdjustYoungGenForMajorPause, false, \
2191 "Adjust young generation to achieve a major pause goal") \
2192 \
2193 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
2194 "Number of steps where heuristics is used before data is used") \
2195 \
2196 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
2197 "Number of collections before the adaptive sizing is started") \
2198 \
2199 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
2200 "Collection interval for printing information; zero means never") \
2201 \
2202 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
2203 "Use adaptive minimum footprint as a goal") \
2204 \
2205 product(uintx, AdaptiveSizePolicyWeight, 10, \
2206 "Weight given to exponential resizing, between 0 and 100") \
2207 range(0, 100) \
2208 \
2209 product(uintx, AdaptiveTimeWeight, 25, \
2210 "Weight given to time in adaptive policy, between 0 and 100") \
2211 range(0, 100) \
2212 \
2213 product(uintx, PausePadding, 1, \
2214 "How much buffer to keep for pause time") \
2215 \
2216 product(uintx, PromotedPadding, 3, \
2217 "How much buffer to keep for promotion failure") \
2218 \
2219 product(uintx, SurvivorPadding, 3, \
2220 "How much buffer to keep for survivor overflow") \
2221 \
2222 product(uintx, ThresholdTolerance, 10, \
2223 "Allowed collection cost difference between generations") \
2224 range(0, 100) \
2225 \
2226 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
2227 "If collection costs are within margin, reduce both by full " \
2228 "delta") \
2229 \
2230 product(uintx, YoungGenerationSizeIncrement, 20, \
2231 "Adaptive size percentage change in young generation") \
2232 range(0, 100) \
2233 \
2234 product(uintx, YoungGenerationSizeSupplement, 80, \
2235 "Supplement to YoungedGenerationSizeIncrement used at startup") \
2236 range(0, 100) \
2237 \
2238 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
2239 "Decay factor to YoungedGenerationSizeSupplement") \
2240 range(1, max_uintx) \
2241 \
2242 product(uintx, TenuredGenerationSizeIncrement, 20, \
2243 "Adaptive size percentage change in tenured generation") \
2244 range(0, 100) \
2245 \
2246 product(uintx, TenuredGenerationSizeSupplement, 80, \
2247 "Supplement to TenuredGenerationSizeIncrement used at startup") \
2248 range(0, 100) \
2249 \
2250 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
2251 "Decay factor to TenuredGenerationSizeIncrement") \
2252 range(1, max_uintx) \
2253 \
2254 product(uintx, MaxGCPauseMillis, max_uintx, \
2255 "Adaptive size policy maximum GC pause time goal in millisecond, "\
2256 "or (G1 Only) the maximum GC time per MMU time slice") \
2257 \
2258 product(uintx, GCPauseIntervalMillis, 0, \
2259 "Time slice for MMU specification") \
2260 \
2261 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
2262 "Adaptive size policy maximum GC minor pause time goal " \
2263 "in millisecond") \
2264 \
2265 product(uintx, GCTimeRatio, 99, \
2266 "Adaptive size policy application time to GC time ratio") \
2267 \
2268 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
2269 "Adaptive size scale down factor for shrinking") \
2270 range(1, max_uintx) \
2271 \
2272 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
2273 "Adaptive size decays the major cost for long major intervals") \
2274 \
2275 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
2276 "Time scale over which major costs decay") \
2277 \
2278 product(uintx, MinSurvivorRatio, 3, \
2279 "Minimum ratio of young generation/survivor space size") \
2280 \
2281 product(uintx, InitialSurvivorRatio, 8, \
2282 "Initial ratio of young generation/survivor space size") \
2283 \
2284 product(size_t, BaseFootPrintEstimate, 256*M, \
2285 "Estimate of footprint other than Java Heap") \
2286 \
2287 product(bool, UseGCOverheadLimit, true, \
2288 "Use policy to limit of proportion of time spent in GC " \
2289 "before an OutOfMemory error is thrown") \
2290 \
2291 product(uintx, GCTimeLimit, 98, \
2292 "Limit of the proportion of time spent in GC before " \
2293 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \
2294 range(0, 100) \
2295 \
2296 product(uintx, GCHeapFreeLimit, 2, \
2297 "Minimum percentage of free space after a full GC before an " \
2298 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
2299 range(0, 100) \
2300 \
2301 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
2302 "Number of consecutive collections before gc time limit fires") \
2303 \
2304 product(bool, PrintAdaptiveSizePolicy, false, \
2305 "Print information about AdaptiveSizePolicy") \
2306 \
2307 product(intx, PrefetchCopyIntervalInBytes, -1, \
2308 "How far ahead to prefetch destination area (<= 0 means off)") \
2309 \
2310 product(intx, PrefetchScanIntervalInBytes, -1, \
2311 "How far ahead to prefetch scan area (<= 0 means off)") \
2312 \
2313 product(intx, PrefetchFieldsAhead, -1, \
2314 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2315 \
2316 diagnostic(bool, VerifySilently, false, \
2317 "Do not print the verification progress") \
2318 \
2319 diagnostic(bool, VerifyDuringStartup, false, \
2320 "Verify memory system before executing any Java code " \
2321 "during VM initialization") \
2322 \
2323 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2324 "Verify system before exiting") \
2325 \
2326 diagnostic(bool, VerifyBeforeGC, false, \
2327 "Verify memory system before GC") \
2328 \
2329 diagnostic(bool, VerifyAfterGC, false, \
2330 "Verify memory system after GC") \
2331 \
2332 diagnostic(bool, VerifyDuringGC, false, \
2333 "Verify memory system during GC (between phases)") \
2334 \
2335 diagnostic(bool, GCParallelVerificationEnabled, true, \
2336 "Enable parallel memory system verification") \
2337 \
2338 diagnostic(bool, DeferInitialCardMark, false, \
2339 "When +ReduceInitialCardMarks, explicitly defer any that " \
2340 "may arise from new_pre_store_barrier") \
2341 \
2342 product(bool, UseCondCardMark, false, \
2343 "Check for already marked card before updating card table") \
2344 \
2345 diagnostic(bool, VerifyRememberedSets, false, \
2346 "Verify GC remembered sets") \
2347 \
2348 diagnostic(bool, VerifyObjectStartArray, true, \
2349 "Verify GC object start array if verify before/after") \
2350 \
2351 product(bool, DisableExplicitGC, false, \
2352 "Ignore calls to System.gc()") \
2353 \
2354 notproduct(bool, CheckMemoryInitialization, false, \
2355 "Check memory initialization") \
2356 \
2357 diagnostic(bool, BindCMSThreadToCPU, false, \
2358 "Bind CMS Thread to CPU if possible") \
2359 \
2360 diagnostic(uintx, CPUForCMSThread, 0, \
2361 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2362 \
2363 product(bool, BindGCTaskThreadsToCPUs, false, \
2364 "Bind GCTaskThreads to CPUs if possible") \
2365 \
2366 product(bool, UseGCTaskAffinity, false, \
2367 "Use worker affinity when asking for GCTasks") \
2368 \
2369 product(uintx, ProcessDistributionStride, 4, \
2370 "Stride through processors when distributing processes") \
2371 \
2372 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2373 "Number of times the coordinator GC thread will sleep while " \
2374 "yielding before giving up and resuming GC") \
2375 \
2376 product(uintx, CMSYieldSleepCount, 0, \
2377 "Number of times a GC thread (minus the coordinator) " \
2378 "will sleep while yielding before giving up and resuming GC") \
2379 \
2380 /* gc tracing */ \
2381 manageable(bool, PrintGC, false, \
2382 "Print message at garbage collection") \
2383 \
2384 manageable(bool, PrintGCDetails, false, \
2385 "Print more details at garbage collection") \
2386 \
2387 manageable(bool, PrintGCDateStamps, false, \
2388 "Print date stamps at garbage collection") \
2389 \
2390 manageable(bool, PrintGCTimeStamps, false, \
2391 "Print timestamps at garbage collection") \
2392 \
2393 manageable(bool, PrintGCID, true, \
2394 "Print an identifier for each garbage collection") \
2395 \
2396 product(bool, PrintGCTaskTimeStamps, false, \
2397 "Print timestamps for individual gc worker thread tasks") \
2398 \
2399 develop(intx, ConcGCYieldTimeout, 0, \
2400 "If non-zero, assert that GC threads yield within this " \
2401 "number of milliseconds") \
2402 \
2403 product(bool, PrintReferenceGC, false, \
2404 "Print times spent handling reference objects during GC " \
2405 "(enabled only when PrintGCDetails)") \
2406 \
2407 develop(bool, TraceReferenceGC, false, \
2408 "Trace handling of soft/weak/final/phantom references") \
2409 \
2410 develop(bool, TraceFinalizerRegistration, false, \
2411 "Trace registration of final references") \
2412 \
2413 notproduct(bool, TraceScavenge, false, \
2414 "Trace scavenge") \
2415 \
2416 product(bool, IgnoreEmptyClassPaths, false, \
2417 "Ignore empty path elements in -classpath") \
2418 \
2419 product(bool, TraceClassPaths, false, \
2420 "Trace processing of class paths") \
2421 \
2422 product_rw(bool, TraceClassLoading, false, \
2423 "Trace all classes loaded") \
2424 \
2425 product(bool, TraceClassLoadingPreorder, false, \
2426 "Trace all classes loaded in order referenced (not loaded)") \
2427 \
2428 product_rw(bool, TraceClassUnloading, false, \
2429 "Trace unloading of classes") \
2430 \
2431 product_rw(bool, TraceLoaderConstraints, false, \
2432 "Trace loader constraints") \
2433 \
2434 develop(bool, TraceClassLoaderData, false, \
2435 "Trace class loader loader_data lifetime") \
2436 \
2437 product(size_t, InitialBootClassLoaderMetaspaceSize, \
2438 NOT_LP64(2200*K) LP64_ONLY(4*M), \
2439 "Initial size of the boot class loader data metaspace") \
2440 \
2441 product(bool, TraceYoungGenTime, false, \
2442 "Trace accumulated time for young collection") \
2443 \
2444 product(bool, TraceOldGenTime, false, \
2445 "Trace accumulated time for old collection") \
2446 \
2447 product(bool, PrintTenuringDistribution, false, \
2448 "Print tenuring age information") \
2449 \
2450 product_rw(bool, PrintHeapAtGC, false, \
2451 "Print heap layout before and after each GC") \
2452 \
2453 product_rw(bool, PrintHeapAtGCExtended, false, \
2454 "Print extended information about the layout of the heap " \
2455 "when -XX:+PrintHeapAtGC is set") \
2456 \
2457 product(bool, PrintHeapAtSIGBREAK, true, \
2458 "Print heap layout in response to SIGBREAK") \
2459 \
2460 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
2461 "Print a class histogram before any major stop-world GC") \
2462 \
2463 manageable(bool, PrintClassHistogramAfterFullGC, false, \
2464 "Print a class histogram after any major stop-world GC") \
2465 \
2466 manageable(bool, PrintClassHistogram, false, \
2467 "Print a histogram of class instances") \
2468 \
2469 develop(bool, TraceWorkGang, false, \
2470 "Trace activities of work gangs") \
2471 \
2472 product(bool, TraceParallelOldGCTasks, false, \
2473 "Trace multithreaded GC activity") \
2474 \
2475 develop(bool, TraceBlockOffsetTable, false, \
2476 "Print BlockOffsetTable maps") \
2477 \
2478 develop(bool, TraceCardTableModRefBS, false, \
2479 "Print CardTableModRefBS maps") \
2480 \
2481 develop(bool, TraceGCTaskManager, false, \
2482 "Trace actions of the GC task manager") \
2483 \
2484 develop(bool, TraceGCTaskQueue, false, \
2485 "Trace actions of the GC task queues") \
2486 \
2487 diagnostic(bool, TraceGCTaskThread, false, \
2488 "Trace actions of the GC task threads") \
2489 \
2490 product(bool, PrintParallelOldGCPhaseTimes, false, \
2491 "Print the time taken by each phase in ParallelOldGC " \
2492 "(PrintGCDetails must also be enabled)") \
2493 \
2494 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2495 "Trace marking phase in ParallelOldGC") \
2496 \
2497 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2498 "Trace summary phase in ParallelOldGC") \
2499 \
2500 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2501 "Trace compaction phase in ParallelOldGC") \
2502 \
2503 develop(bool, TraceParallelOldGCDensePrefix, false, \
2504 "Trace dense prefix computation for ParallelOldGC") \
2505 \
2506 develop(bool, IgnoreLibthreadGPFault, false, \
2507 "Suppress workaround for libthread GP fault") \
2508 \
2509 product(bool, PrintJNIGCStalls, false, \
2510 "Print diagnostic message when GC is stalled " \
2511 "by JNI critical section") \
2512 \
2513 experimental(double, ObjectCountCutOffPercent, 0.5, \
2514 "The percentage of the used heap that the instances of a class " \
2515 "must occupy for the class to generate a trace event") \
2516 \
2517 /* GC log rotation setting */ \
2518 \
2519 product(bool, UseGCLogFileRotation, false, \
2520 "Rotate gclog files (for long running applications). It requires "\
2521 "-Xloggc:<filename>") \
2522 \
2523 product(uintx, NumberOfGCLogFiles, 0, \
2524 "Number of gclog files in rotation " \
2525 "(default: 0, no rotation)") \
2526 \
2527 product(size_t, GCLogFileSize, 8*K, \
2528 "GC log file size, requires UseGCLogFileRotation. " \
2529 "Set to 0 to only trigger rotation via jcmd") \
2530 \
2531 /* JVMTI heap profiling */ \
2532 \
2533 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2534 "Trace JVMTI object tagging calls") \
2535 \
2536 diagnostic(bool, VerifyBeforeIteration, false, \
2537 "Verify memory system before JVMTI iteration") \
2538 \
2539 /* compiler interface */ \
2540 \
2541 develop(bool, CIPrintCompilerName, false, \
2542 "when CIPrint is active, print the name of the active compiler") \
2543 \
2544 diagnostic(bool, CIPrintCompileQueue, false, \
2545 "display the contents of the compile queue whenever a " \
2546 "compilation is enqueued") \
2547 \
2548 develop(bool, CIPrintRequests, false, \
2549 "display every request for compilation") \
2550 \
2551 product(bool, CITime, false, \
2552 "collect timing information for compilation") \
2553 \
2554 develop(bool, CITimeVerbose, false, \
2555 "be more verbose in compilation timings") \
2556 \
2557 develop(bool, CITimeEach, false, \
2558 "display timing information after each successful compilation") \
2559 \
2560 develop(bool, CICountOSR, false, \
2561 "use a separate counter when assigning ids to osr compilations") \
2562 \
2563 develop(bool, CICompileNatives, true, \
2564 "compile native methods if supported by the compiler") \
2565 \
2566 develop_pd(bool, CICompileOSR, \
2567 "compile on stack replacement methods if supported by the " \
2568 "compiler") \
2569 \
2570 develop(bool, CIPrintMethodCodes, false, \
2571 "print method bytecodes of the compiled code") \
2572 \
2573 develop(bool, CIPrintTypeFlow, false, \
2574 "print the results of ciTypeFlow analysis") \
2575 \
2576 develop(bool, CITraceTypeFlow, false, \
2577 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2578 \
2579 develop(intx, OSROnlyBCI, -1, \
2580 "OSR only at this bci. Negative values mean exclude that bci") \
2581 \
2582 /* compiler */ \
2583 \
2584 /* notice: the max range value here is max_jint, not max_intx */ \
2585 /* because of overflow issue */ \
2586 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2587 "Number of compiler threads to run") \
2588 range((intx)Arguments::get_min_number_of_compiler_threads(), \
2589 max_jint) \
2590 \
2591 product(intx, CompilationPolicyChoice, 0, \
2592 "which compilation policy (0-3)") \
2593 range(0, 3) \
2594 \
2595 develop(bool, UseStackBanging, true, \
2596 "use stack banging for stack overflow checks (required for " \
2597 "proper StackOverflow handling; disable only to measure cost " \
2598 "of stackbanging)") \
2599 \
2600 develop(bool, UseStrictFP, true, \
2601 "use strict fp if modifier strictfp is set") \
2602 \
2603 develop(bool, GenerateSynchronizationCode, true, \
2604 "generate locking/unlocking code for synchronized methods and " \
2605 "monitors") \
2606 \
2607 develop(bool, GenerateCompilerNullChecks, true, \
2608 "Generate explicit null checks for loads/stores/calls") \
2609 \
2610 develop(bool, GenerateRangeChecks, true, \
2611 "Generate range checks for array accesses") \
2612 \
2613 develop_pd(bool, ImplicitNullChecks, \
2614 "Generate code for implicit null checks") \
2615 \
2616 product_pd(bool, TrapBasedNullChecks, \
2617 "Generate code for null checks that uses a cmp and trap " \
2618 "instruction raising SIGTRAP. This is only used if an access to" \
2619 "null (+offset) will not raise a SIGSEGV, i.e.," \
2620 "ImplicitNullChecks don't work (PPC64).") \
2621 \
2622 product(bool, PrintSafepointStatistics, false, \
2623 "Print statistics about safepoint synchronization") \
2624 \
2625 product(intx, PrintSafepointStatisticsCount, 300, \
2626 "Total number of safepoint statistics collected " \
2627 "before printing them out") \
2628 \
2629 product(intx, PrintSafepointStatisticsTimeout, -1, \
2630 "Print safepoint statistics only when safepoint takes " \
2631 "more than PrintSafepointSatisticsTimeout in millis") \
2632 \
2633 product(bool, TraceSafepointCleanupTime, false, \
2634 "Print the break down of clean up tasks performed during " \
2635 "safepoint") \
2636 \
2637 product(bool, Inline, true, \
2638 "Enable inlining") \
2639 \
2640 product(bool, ClipInlining, true, \
2641 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \
2642 \
2643 develop(bool, UseCHA, true, \
2644 "Enable CHA") \
2645 \
2646 product(bool, UseTypeProfile, true, \
2647 "Check interpreter profile for historically monomorphic calls") \
2648 \
2649 diagnostic(bool, PrintInlining, false, \
2650 "Print inlining optimizations") \
2651 \
2652 product(bool, UsePopCountInstruction, false, \
2653 "Use population count instruction") \
2654 \
2655 develop(bool, EagerInitialization, false, \
2656 "Eagerly initialize classes if possible") \
2657 \
2658 develop(bool, TraceMethodReplacement, false, \
2659 "Print when methods are replaced do to recompilation") \
2660 \
2661 develop(bool, PrintMethodFlushing, false, \
2662 "Print the nmethods being flushed") \
2663 \
2664 diagnostic(bool, PrintMethodFlushingStatistics, false, \
2665 "print statistics about method flushing") \
2666 \
2667 diagnostic(intx, HotMethodDetectionLimit, 100000, \
2668 "Number of compiled code invocations after which " \
2669 "the method is considered as hot by the flusher") \
2670 \
2671 diagnostic(intx, MinPassesBeforeFlush, 10, \
2672 "Minimum number of sweeper passes before an nmethod " \
2673 "can be flushed") \
2674 \
2675 product(bool, UseCodeAging, true, \
2676 "Insert counter to detect warm methods") \
2677 \
2678 diagnostic(bool, StressCodeAging, false, \
2679 "Start with counters compiled in") \
2680 \
2681 develop(bool, UseRelocIndex, false, \
2682 "Use an index to speed random access to relocations") \
2683 \
2684 develop(bool, StressCodeBuffers, false, \
2685 "Exercise code buffer expansion and other rare state changes") \
2686 \
2687 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2688 "Generate extra debugging information for non-safepoints in " \
2689 "nmethods") \
2690 \
2691 product(bool, PrintVMOptions, false, \
2692 "Print flags that appeared on the command line") \
2693 \
2694 product(bool, IgnoreUnrecognizedVMOptions, false, \
2695 "Ignore unrecognized VM options") \
2696 \
2697 product(bool, PrintCommandLineFlags, false, \
2698 "Print flags specified on command line or set by ergonomics") \
2699 \
2700 product(bool, PrintFlagsInitial, false, \
2701 "Print all VM flags before argument processing and exit VM") \
2702 \
2703 product(bool, PrintFlagsFinal, false, \
2704 "Print all VM flags after argument and ergonomic processing") \
2705 \
2706 notproduct(bool, PrintFlagsWithComments, false, \
2707 "Print all VM flags with default values and descriptions and " \
2708 "exit") \
2709 \
2710 product(bool, PrintFlagsRanges, false, \
2711 "Print VM flags and their ranges and exit VM") \
2712 \
2713 diagnostic(bool, SerializeVMOutput, true, \
2714 "Use a mutex to serialize output to tty and LogFile") \
2715 \
2716 diagnostic(bool, DisplayVMOutput, true, \
2717 "Display all VM output on the tty, independently of LogVMOutput") \
2718 \
2719 diagnostic(bool, LogVMOutput, false, \
2720 "Save VM output to LogFile") \
2721 \
2722 diagnostic(ccstr, LogFile, NULL, \
2723 "If LogVMOutput or LogCompilation is on, save VM output to " \
2724 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
2725 \
2726 product(ccstr, ErrorFile, NULL, \
2727 "If an error occurs, save the error data to this file " \
2728 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2729 \
2730 product(bool, DisplayVMOutputToStderr, false, \
2731 "If DisplayVMOutput is true, display all VM output to stderr") \
2732 \
2733 product(bool, DisplayVMOutputToStdout, false, \
2734 "If DisplayVMOutput is true, display all VM output to stdout") \
2735 \
2736 product(bool, UseHeavyMonitors, false, \
2737 "use heavyweight instead of lightweight Java monitors") \
2738 \
2739 product(bool, PrintStringTableStatistics, false, \
2740 "print statistics about the StringTable and SymbolTable") \
2741 \
2742 diagnostic(bool, VerifyStringTableAtExit, false, \
2743 "verify StringTable contents at exit") \
2744 \
2745 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2746 "print histogram of the symbol table") \
2747 \
2748 notproduct(bool, ExitVMOnVerifyError, false, \
2749 "standard exit from VM if bytecode verify error " \
2750 "(only in debug mode)") \
2751 \
2752 notproduct(ccstr, AbortVMOnException, NULL, \
2753 "Call fatal if this exception is thrown. Example: " \
2754 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2755 \
2756 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \
2757 "Call fatal if the exception pointed by AbortVMOnException " \
2758 "has this message") \
2759 \
2760 develop(bool, DebugVtables, false, \
2761 "add debugging code to vtable dispatch") \
2762 \
2763 develop(bool, PrintVtables, false, \
2764 "print vtables when printing klass") \
2765 \
2766 notproduct(bool, PrintVtableStats, false, \
2767 "print vtables stats at end of run") \
2768 \
2769 develop(bool, TraceCreateZombies, false, \
2770 "trace creation of zombie nmethods") \
2771 \
2772 notproduct(bool, IgnoreLockingAssertions, false, \
2773 "disable locking assertions (for speed)") \
2774 \
2775 product(bool, RangeCheckElimination, true, \
2776 "Eliminate range checks") \
2777 \
2778 develop_pd(bool, UncommonNullCast, \
2779 "track occurrences of null in casts; adjust compiler tactics") \
2780 \
2781 develop(bool, TypeProfileCasts, true, \
2782 "treat casts like calls for purposes of type profiling") \
2783 \
2784 develop(bool, DelayCompilationDuringStartup, true, \
2785 "Delay invoking the compiler until main application class is " \
2786 "loaded") \
2787 \
2788 develop(bool, CompileTheWorld, false, \
2789 "Compile all methods in all classes in bootstrap class path " \
2790 "(stress test)") \
2791 \
2792 develop(bool, CompileTheWorldPreloadClasses, true, \
2793 "Preload all classes used by a class before start loading") \
2794 \
2795 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2796 "Force a safepoint every n compiles so sweeper can keep up") \
2797 \
2798 develop(bool, FillDelaySlots, true, \
2799 "Fill delay slots (on SPARC only)") \
2800 \
2801 develop(bool, TimeLivenessAnalysis, false, \
2802 "Time computation of bytecode liveness analysis") \
2803 \
2804 develop(bool, TraceLivenessGen, false, \
2805 "Trace the generation of liveness analysis information") \
2806 \
2807 notproduct(bool, TraceLivenessQuery, false, \
2808 "Trace queries of liveness analysis information") \
2809 \
2810 notproduct(bool, CollectIndexSetStatistics, false, \
2811 "Collect information about IndexSets") \
2812 \
2813 develop(bool, UseLoopSafepoints, true, \
2814 "Generate Safepoint nodes in every loop") \
2815 \
2816 develop(intx, FastAllocateSizeLimit, 128*K, \
2817 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2818 "Inline allocations larger than this in doublewords must go slow")\
2819 \
2820 product(bool, AggressiveOpts, false, \
2821 "Enable aggressive optimizations - see arguments.cpp") \
2822 \
2823 product_pd(uintx, TypeProfileLevel, \
2824 "=XYZ, with Z: Type profiling of arguments at call; " \
2825 "Y: Type profiling of return value at call; " \
2826 "X: Type profiling of parameters to methods; " \
2827 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \
2828 \
2829 product(intx, TypeProfileArgsLimit, 2, \
2830 "max number of call arguments to consider for type profiling") \
2831 \
2832 product(intx, TypeProfileParmsLimit, 2, \
2833 "max number of incoming parameters to consider for type profiling"\
2834 ", -1 for all") \
2835 \
2836 /* statistics */ \
2837 develop(bool, CountCompiledCalls, false, \
2838 "Count method invocations") \
2839 \
2840 notproduct(bool, CountRuntimeCalls, false, \
2841 "Count VM runtime calls") \
2842 \
2843 develop(bool, CountJNICalls, false, \
2844 "Count jni method invocations") \
2845 \
2846 notproduct(bool, CountJVMCalls, false, \
2847 "Count jvm method invocations") \
2848 \
2849 notproduct(bool, CountRemovableExceptions, false, \
2850 "Count exceptions that could be replaced by branches due to " \
2851 "inlining") \
2852 \
2853 notproduct(bool, ICMissHistogram, false, \
2854 "Produce histogram of IC misses") \
2855 \
2856 notproduct(bool, PrintClassStatistics, false, \
2857 "Print class statistics at end of run") \
2858 \
2859 notproduct(bool, PrintMethodStatistics, false, \
2860 "Print method statistics at end of run") \
2861 \
2862 /* interpreter */ \
2863 develop(bool, ClearInterpreterLocals, false, \
2864 "Always clear local variables of interpreter activations upon " \
2865 "entry") \
2866 \
2867 product_pd(bool, RewriteBytecodes, \
2868 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2869 \
2870 product_pd(bool, RewriteFrequentPairs, \
2871 "Rewrite frequently used bytecode pairs into a single bytecode") \
2872 \
2873 diagnostic(bool, PrintInterpreter, false, \
2874 "Print the generated interpreter code") \
2875 \
2876 product(bool, UseInterpreter, true, \
2877 "Use interpreter for non-compiled methods") \
2878 \
2879 develop(bool, UseFastSignatureHandlers, true, \
2880 "Use fast signature handlers for native calls") \
2881 \
2882 product(bool, UseLoopCounter, true, \
2883 "Increment invocation counter on backward branch") \
2884 \
2885 product_pd(bool, UseOnStackReplacement, \
2886 "Use on stack replacement, calls runtime if invoc. counter " \
2887 "overflows in loop") \
2888 \
2889 notproduct(bool, TraceOnStackReplacement, false, \
2890 "Trace on stack replacement") \
2891 \
2892 product_pd(bool, PreferInterpreterNativeStubs, \
2893 "Use always interpreter stubs for native methods invoked via " \
2894 "interpreter") \
2895 \
2896 develop(bool, CountBytecodes, false, \
2897 "Count number of bytecodes executed") \
2898 \
2899 develop(bool, PrintBytecodeHistogram, false, \
2900 "Print histogram of the executed bytecodes") \
2901 \
2902 develop(bool, PrintBytecodePairHistogram, false, \
2903 "Print histogram of the executed bytecode pairs") \
2904 \
2905 diagnostic(bool, PrintSignatureHandlers, false, \
2906 "Print code generated for native method signature handlers") \
2907 \
2908 develop(bool, VerifyOops, false, \
2909 "Do plausibility checks for oops") \
2910 \
2911 develop(bool, CheckUnhandledOops, false, \
2912 "Check for unhandled oops in VM code") \
2913 \
2914 develop(bool, VerifyJNIFields, trueInDebug, \
2915 "Verify jfieldIDs for instance fields") \
2916 \
2917 notproduct(bool, VerifyJNIEnvThread, false, \
2918 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2919 "from JNI") \
2920 \
2921 develop(bool, VerifyFPU, false, \
2922 "Verify FPU state (check for NaN's, etc.)") \
2923 \
2924 develop(bool, VerifyThread, false, \
2925 "Watch the thread register for corruption (SPARC only)") \
2926 \
2927 develop(bool, VerifyActivationFrameSize, false, \
2928 "Verify that activation frame didn't become smaller than its " \
2929 "minimal size") \
2930 \
2931 develop(bool, TraceFrequencyInlining, false, \
2932 "Trace frequency based inlining") \
2933 \
2934 develop_pd(bool, InlineIntrinsics, \
2935 "Inline intrinsics that can be statically resolved") \
2936 \
2937 product_pd(bool, ProfileInterpreter, \
2938 "Profile at the bytecode level during interpretation") \
2939 \
2940 develop(bool, TraceProfileInterpreter, false, \
2941 "Trace profiling at the bytecode level during interpretation. " \
2942 "This outputs the profiling information collected to improve " \
2943 "jit compilation.") \
2944 \
2945 develop_pd(bool, ProfileTraps, \
2946 "Profile deoptimization traps at the bytecode level") \
2947 \
2948 product(intx, ProfileMaturityPercentage, 20, \
2949 "number of method invocations/branches (expressed as % of " \
2950 "CompileThreshold) before using the method's profile") \
2951 range(0, 100) \
2952 \
2953 diagnostic(bool, PrintMethodData, false, \
2954 "Print the results of +ProfileInterpreter at end of run") \
2955 \
2956 develop(bool, VerifyDataPointer, trueInDebug, \
2957 "Verify the method data pointer during interpreter profiling") \
2958 \
2959 develop(bool, VerifyCompiledCode, false, \
2960 "Include miscellaneous runtime verifications in nmethod code; " \
2961 "default off because it disturbs nmethod size heuristics") \
2962 \
2963 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2964 "Manually make GC thread crash then dump java stack trace; " \
2965 "Test only") \
2966 \
2967 /* compilation */ \
2968 product(bool, UseCompiler, true, \
2969 "Use Just-In-Time compilation") \
2970 \
2971 develop(bool, TraceCompilationPolicy, false, \
2972 "Trace compilation policy") \
2973 \
2974 develop(bool, TimeCompilationPolicy, false, \
2975 "Time the compilation policy") \
2976 \
2977 product(bool, UseCounterDecay, true, \
2978 "Adjust recompilation counters") \
2979 \
2980 develop(intx, CounterHalfLifeTime, 30, \
2981 "Half-life time of invocation counters (in seconds)") \
2982 \
2983 develop(intx, CounterDecayMinIntervalLength, 500, \
2984 "The minimum interval (in milliseconds) between invocation of " \
2985 "CounterDecay") \
2986 \
2987 product(bool, AlwaysCompileLoopMethods, false, \
2988 "When using recompilation, never interpret methods " \
2989 "containing loops") \
2990 \
2991 product(bool, DontCompileHugeMethods, true, \
2992 "Do not compile methods > HugeMethodLimit") \
2993 \
2994 /* Bytecode escape analysis estimation. */ \
2995 product(bool, EstimateArgEscape, true, \
2996 "Analyze bytecodes to estimate escape state of arguments") \
2997 \
2998 product(intx, BCEATraceLevel, 0, \
2999 "How much tracing to do of bytecode escape analysis estimates") \
3000 \
3001 product(intx, MaxBCEAEstimateLevel, 5, \
3002 "Maximum number of nested calls that are analyzed by BC EA") \
3003 \
3004 product(intx, MaxBCEAEstimateSize, 150, \
3005 "Maximum bytecode size of a method to be analyzed by BC EA") \
3006 \
3007 product(intx, AllocatePrefetchStyle, 1, \
3008 "0 = no prefetch, " \
3009 "1 = prefetch instructions for each allocation, " \
3010 "2 = use TLAB watermark to gate allocation prefetch, " \
3011 "3 = use BIS instruction on Sparc for allocation prefetch") \
3012 range(0, 3) \
3013 \
3014 product(intx, AllocatePrefetchDistance, -1, \
3015 "Distance to prefetch ahead of allocation pointer") \
3016 \
3017 product(intx, AllocatePrefetchLines, 3, \
3018 "Number of lines to prefetch ahead of array allocation pointer") \
3019 \
3020 product(intx, AllocateInstancePrefetchLines, 1, \
3021 "Number of lines to prefetch ahead of instance allocation " \
3022 "pointer") \
3023 \
3024 product(intx, AllocatePrefetchStepSize, 16, \
3025 "Step size in bytes of sequential prefetch instructions") \
3026 \
3027 product(intx, AllocatePrefetchInstr, 0, \
3028 "Prefetch instruction to prefetch ahead of allocation pointer") \
3029 \
3030 /* deoptimization */ \
3031 develop(bool, TraceDeoptimization, false, \
3032 "Trace deoptimization") \
3033 \
3034 develop(bool, DebugDeoptimization, false, \
3035 "Tracing various information while debugging deoptimization") \
3036 \
3037 product(intx, SelfDestructTimer, 0, \
3038 "Will cause VM to terminate after a given time (in minutes) " \
3039 "(0 means off)") \
3040 \
3041 product(intx, MaxJavaStackTraceDepth, 1024, \
3042 "The maximum number of lines in the stack trace for Java " \
3043 "exceptions (0 means all)") \
3044 \
3045 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
3046 "Guarantee a safepoint (at least) every so many milliseconds " \
3047 "(0 means none)")) \
3048 \
3049 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \
3050 "Guarantee a safepoint (at least) every so many milliseconds " \
3051 "(0 means none)")) \
3052 \
3053 product(intx, SafepointTimeoutDelay, 10000, \
3054 "Delay in milliseconds for option SafepointTimeout") \
3055 \
3056 product(intx, NmethodSweepActivity, 10, \
3057 "Removes cold nmethods from code cache if > 0. Higher values " \
3058 "result in more aggressive sweeping") \
3059 range(0, 2000) \
3060 \
3061 notproduct(bool, LogSweeper, false, \
3062 "Keep a ring buffer of sweeper activity") \
3063 \
3064 notproduct(intx, SweeperLogEntries, 1024, \
3065 "Number of records in the ring buffer of sweeper activity") \
3066 \
3067 notproduct(intx, MemProfilingInterval, 500, \
3068 "Time between each invocation of the MemProfiler") \
3069 \
3070 develop(intx, MallocCatchPtr, -1, \
3071 "Hit breakpoint when mallocing/freeing this pointer") \
3072 \
3073 notproduct(ccstrlist, SuppressErrorAt, "", \
3074 "List of assertions (file:line) to muzzle") \
3075 \
3076 notproduct(size_t, HandleAllocationLimit, 1024, \
3077 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
3078 "is used") \
3079 \
3080 develop(size_t, TotalHandleAllocationLimit, 1024, \
3081 "Threshold for total handle allocation when " \
3082 "+TraceHandleAllocation is used") \
3083 \
3084 develop(intx, StackPrintLimit, 100, \
3085 "number of stack frames to print in VM-level stack dump") \
3086 \
3087 notproduct(intx, MaxElementPrintSize, 256, \
3088 "maximum number of elements to print") \
3089 \
3090 notproduct(intx, MaxSubklassPrintSize, 4, \
3091 "maximum number of subklasses to print when printing klass") \
3092 \
3093 product(intx, MaxInlineLevel, 9, \
3094 "maximum number of nested calls that are inlined") \
3095 \
3096 product(intx, MaxRecursiveInlineLevel, 1, \
3097 "maximum number of nested recursive calls that are inlined") \
3098 \
3099 develop(intx, MaxForceInlineLevel, 100, \
3100 "maximum number of nested calls that are forced for inlining " \
3101 "(using CompilerOracle or marked w/ @ForceInline)") \
3102 \
3103 product_pd(intx, InlineSmallCode, \
3104 "Only inline already compiled methods if their code size is " \
3105 "less than this") \
3106 \
3107 product(intx, MaxInlineSize, 35, \
3108 "The maximum bytecode size of a method to be inlined") \
3109 \
3110 product_pd(intx, FreqInlineSize, \
3111 "The maximum bytecode size of a frequent method to be inlined") \
3112 \
3113 product(intx, MaxTrivialSize, 6, \
3114 "The maximum bytecode size of a trivial method to be inlined") \
3115 \
3116 product(intx, MinInliningThreshold, 250, \
3117 "The minimum invocation count a method needs to have to be " \
3118 "inlined") \
3119 \
3120 develop(intx, MethodHistogramCutoff, 100, \
3121 "The cutoff value for method invocation histogram (+CountCalls)") \
3122 \
3123 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
3124 "Number of interpreted methods to show in profile") \
3125 \
3126 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
3127 "Number of compiled methods to show in profile") \
3128 \
3129 develop(intx, ProfilerNumberOfStubMethods, 25, \
3130 "Number of stub methods to show in profile") \
3131 \
3132 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
3133 "Number of runtime stub nodes to show in profile") \
3134 \
3135 product(intx, ProfileIntervalsTicks, 100, \
3136 "Number of ticks between printing of interval profile " \
3137 "(+ProfileIntervals)") \
3138 \
3139 notproduct(intx, ScavengeALotInterval, 1, \
3140 "Interval between which scavenge will occur with +ScavengeALot") \
3141 \
3142 notproduct(intx, FullGCALotInterval, 1, \
3143 "Interval between which full gc will occur with +FullGCALot") \
3144 \
3145 notproduct(intx, FullGCALotStart, 0, \
3146 "For which invocation to start FullGCAlot") \
3147 \
3148 notproduct(intx, FullGCALotDummies, 32*K, \
3149 "Dummy object allocated with +FullGCALot, forcing all objects " \
3150 "to move") \
3151 \
3152 develop(intx, DontYieldALotInterval, 10, \
3153 "Interval between which yields will be dropped (milliseconds)") \
3154 \
3155 develop(intx, MinSleepInterval, 1, \
3156 "Minimum sleep() interval (milliseconds) when " \
3157 "ConvertSleepToYield is off (used for Solaris)") \
3158 \
3159 develop(intx, ProfilerPCTickThreshold, 15, \
3160 "Number of ticks in a PC buckets to be a hotspot") \
3161 \
3162 notproduct(intx, DeoptimizeALotInterval, 5, \
3163 "Number of exits until DeoptimizeALot kicks in") \
3164 \
3165 notproduct(intx, ZombieALotInterval, 5, \
3166 "Number of exits until ZombieALot kicks in") \
3167 \
3168 diagnostic(intx, MallocVerifyInterval, 0, \
3169 "If non-zero, verify C heap after every N calls to " \
3170 "malloc/realloc/free") \
3171 \
3172 diagnostic(intx, MallocVerifyStart, 0, \
3173 "If non-zero, start verifying C heap after Nth call to " \
3174 "malloc/realloc/free") \
3175 \
3176 diagnostic(uintx, MallocMaxTestWords, 0, \
3177 "If non-zero, maximum number of words that malloc/realloc can " \
3178 "allocate (for testing only)") \
3179 \
3180 product(intx, TypeProfileWidth, 2, \
3181 "Number of receiver types to record in call/cast profile") \
3182 \
3183 develop(intx, BciProfileWidth, 2, \
3184 "Number of return bci's to record in ret profile") \
3185 \
3186 product(intx, PerMethodRecompilationCutoff, 400, \
3187 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3188 range(-1, max_intx) \
3189 \
3190 product(intx, PerBytecodeRecompilationCutoff, 200, \
3191 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
3192 range(-1, max_intx) \
3193 \
3194 product(intx, PerMethodTrapLimit, 100, \
3195 "Limit on traps (of one kind) in a method (includes inlines)") \
3196 \
3197 experimental(intx, PerMethodSpecTrapLimit, 5000, \
3198 "Limit on speculative traps (of one kind) in a method " \
3199 "(includes inlines)") \
3200 \
3201 product(intx, PerBytecodeTrapLimit, 4, \
3202 "Limit on traps (of one kind) at a particular BCI") \
3203 \
3204 experimental(intx, SpecTrapLimitExtraEntries, 3, \
3205 "Extra method data trap entries for speculation") \
3206 \
3207 develop(intx, InlineFrequencyRatio, 20, \
3208 "Ratio of call site execution to caller method invocation") \
3209 \
3210 develop_pd(intx, InlineFrequencyCount, \
3211 "Count of call site execution necessary to trigger frequent " \
3212 "inlining") \
3213 \
3214 develop(intx, InlineThrowCount, 50, \
3215 "Force inlining of interpreted methods that throw this often") \
3216 \
3217 develop(intx, InlineThrowMaxSize, 200, \
3218 "Force inlining of throwing methods smaller than this") \
3219 \
3220 develop(intx, ProfilerNodeSize, 1024, \
3221 "Size in K to allocate for the Profile Nodes of each thread") \
3222 \
3223 product_pd(intx, PreInflateSpin, \
3224 "Number of times to spin wait before inflation") \
3225 \
3226 /* gc parameters */ \
3227 product(size_t, InitialHeapSize, 0, \
3228 "Initial heap size (in bytes); zero means use ergonomics") \
3229 \
3230 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \
3231 "Maximum heap size (in bytes)") \
3232 \
3233 product(size_t, OldSize, ScaleForWordSize(4*M), \
3234 "Initial tenured generation size (in bytes)") \
3235 \
3236 product(size_t, NewSize, ScaleForWordSize(1*M), \
3237 "Initial new generation size (in bytes)") \
3238 \
3239 product(size_t, MaxNewSize, max_uintx, \
3240 "Maximum new generation size (in bytes), max_uintx means set " \
3241 "ergonomically") \
3242 \
3243 product(size_t, PretenureSizeThreshold, 0, \
3244 "Maximum size in bytes of objects allocated in DefNew " \
3245 "generation; zero means no maximum") \
3246 \
3247 product(size_t, TLABSize, 0, \
3248 "Starting TLAB size (in bytes); zero means set ergonomically") \
3249 \
3250 product(size_t, MinTLABSize, 2*K, \
3251 "Minimum allowed TLAB size (in bytes)") \
3252 range(1, max_uintx) \
3253 \
3254 product(uintx, TLABAllocationWeight, 35, \
3255 "Allocation averaging weight") \
3256 range(0, 100) \
3257 \
3258 /* Limit the lower bound of this flag to 1 as it is used */ \
3259 /* in a division expression. */ \
3260 product(uintx, TLABWasteTargetPercent, 1, \
3261 "Percentage of Eden that can be wasted") \
3262 range(1, 100) \
3263 \
3264 product(uintx, TLABRefillWasteFraction, 64, \
3265 "Maximum TLAB waste at a refill (internal fragmentation)") \
3266 range(1, max_uintx) \
3267 \
3268 product(uintx, TLABWasteIncrement, 4, \
3269 "Increment allowed waste at slow allocation") \
3270 \
3271 product(uintx, SurvivorRatio, 8, \
3272 "Ratio of eden/survivor space size") \
3273 \
3274 product(uintx, NewRatio, 2, \
3275 "Ratio of old/new generation sizes") \
3276 \
3277 product_pd(size_t, NewSizeThreadIncrease, \
3278 "Additional size added to desired new generation size per " \
3279 "non-daemon thread (in bytes)") \
3280 \
3281 product_pd(size_t, MetaspaceSize, \
3282 "Initial size of Metaspaces (in bytes)") \
3283 \
3284 product(size_t, MaxMetaspaceSize, max_uintx, \
3285 "Maximum size of Metaspaces (in bytes)") \
3286 \
3287 product(size_t, CompressedClassSpaceSize, 1*G, \
3288 "Maximum size of class area in Metaspace when compressed " \
3289 "class pointers are used") \
3290 range(1*M, 3*G) \
3291 \
3292 manageable(uintx, MinHeapFreeRatio, 40, \
3293 "The minimum percentage of heap free after GC to avoid expansion."\
3294 " For most GCs this applies to the old generation. In G1 and" \
3295 " ParallelGC it applies to the whole heap.") \
3296 range(0, 100) \
3297 constraint(MinHeapFreeRatioConstraintFunc) \
3298 \
3299 manageable(uintx, MaxHeapFreeRatio, 70, \
3300 "The maximum percentage of heap free after GC to avoid shrinking."\
3301 " For most GCs this applies to the old generation. In G1 and" \
3302 " ParallelGC it applies to the whole heap.") \
3303 range(0, 100) \
3304 constraint(MaxHeapFreeRatioConstraintFunc) \
3305 \
3306 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
3307 "Number of milliseconds per MB of free space in the heap") \
3308 \
3309 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
3310 "The minimum change in heap space due to GC (in bytes)") \
3311 \
3312 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \
3313 "The minimum expansion of Metaspace (in bytes)") \
3314 \
3315 product(uintx, MaxMetaspaceFreeRatio, 70, \
3316 "The maximum percentage of Metaspace free after GC to avoid " \
3317 "shrinking") \
3318 range(0, 100) \
3319 constraint(MaxMetaspaceFreeRatioConstraintFunc) \
3320 \
3321 product(uintx, MinMetaspaceFreeRatio, 40, \
3322 "The minimum percentage of Metaspace free after GC to avoid " \
3323 "expansion") \
3324 range(0, 100) \
3325 constraint(MinMetaspaceFreeRatioConstraintFunc) \
3326 \
3327 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \
3328 "The maximum expansion of Metaspace without full GC (in bytes)") \
3329 \
3330 product(uintx, QueuedAllocationWarningCount, 0, \
3331 "Number of times an allocation that queues behind a GC " \
3332 "will retry before printing a warning") \
3333 \
3334 diagnostic(uintx, VerifyGCStartAt, 0, \
3335 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3336 \
3337 diagnostic(intx, VerifyGCLevel, 0, \
3338 "Generation level at which to start +VerifyBefore/AfterGC") \
3339 \
3340 product(uintx, MaxTenuringThreshold, 15, \
3341 "Maximum value for tenuring threshold") \
3342 range(0, markOopDesc::max_age + 1) \
3343 constraint(MaxTenuringThresholdConstraintFunc) \
3344 \
3345 product(uintx, InitialTenuringThreshold, 7, \
3346 "Initial value for tenuring threshold") \
3347 range(0, markOopDesc::max_age + 1) \
3348 constraint(InitialTenuringThresholdConstraintFunc) \
3349 \
3350 product(uintx, TargetSurvivorRatio, 50, \
3351 "Desired percentage of survivor space used after scavenge") \
3352 range(0, 100) \
3353 \
3354 product(uintx, MarkSweepDeadRatio, 5, \
3355 "Percentage (0-100) of the old gen allowed as dead wood. " \
3356 "Serial mark sweep treats this as both the minimum and maximum " \
3357 "value. " \
3358 "CMS uses this value only if it falls back to mark sweep. " \
3359 "Par compact uses a variable scale based on the density of the " \
3360 "generation and treats this as the maximum value when the heap " \
3361 "is either completely full or completely empty. Par compact " \
3362 "also has a smaller default value; see arguments.cpp.") \
3363 range(0, 100) \
3364 \
3365 product(uintx, MarkSweepAlwaysCompactCount, 4, \
3366 "How often should we fully compact the heap (ignoring the dead " \
3367 "space parameters)") \
3368 range(1, max_uintx) \
3369 \
3370 product(intx, PrintCMSStatistics, 0, \
3371 "Statistics for CMS") \
3372 \
3373 product(bool, PrintCMSInitiationStatistics, false, \
3374 "Statistics for initiating a CMS collection") \
3375 \
3376 product(intx, PrintFLSStatistics, 0, \
3377 "Statistics for CMS' FreeListSpace") \
3378 \
3379 product(intx, PrintFLSCensus, 0, \
3380 "Census for CMS' FreeListSpace") \
3381 \
3382 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3383 "Delay between expansion and allocation (in milliseconds)") \
3384 \
3385 develop(uintx, GCWorkerDelayMillis, 0, \
3386 "Delay in scheduling GC workers (in milliseconds)") \
3387 \
3388 product(intx, DeferThrSuspendLoopCount, 4000, \
3389 "(Unstable) Number of times to iterate in safepoint loop " \
3390 "before blocking VM threads ") \
3391 \
3392 product(intx, DeferPollingPageLoopCount, -1, \
3393 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3394 "before changing safepoint polling page to RO ") \
3395 \
3396 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3397 \
3398 product(bool, PSChunkLargeArrays, true, \
3399 "Process large arrays in chunks") \
3400 \
3401 product(uintx, GCDrainStackTargetSize, 64, \
3402 "Number of entries we will try to leave on the stack " \
3403 "during parallel gc") \
3404 \
3405 /* stack parameters */ \
3406 product_pd(intx, StackYellowPages, \
3407 "Number of yellow zone (recoverable overflows) pages") \
3408 range(1, max_intx) \
3409 \
3410 product_pd(intx, StackRedPages, \
3411 "Number of red zone (unrecoverable overflows) pages") \
3412 range(1, max_intx) \
3413 \
3414 /* greater stack shadow pages can't generate instruction to bang stack */ \
3415 product_pd(intx, StackShadowPages, \
3416 "Number of shadow zone (for overflow checking) pages " \
3417 "this should exceed the depth of the VM and native call stack") \
3418 range(1, 50) \
3419 \
3420 product_pd(intx, ThreadStackSize, \
3421 "Thread Stack Size (in Kbytes)") \
3422 \
3423 product_pd(intx, VMThreadStackSize, \
3424 "Non-Java Thread Stack Size (in Kbytes)") \
3425 \
3426 product_pd(intx, CompilerThreadStackSize, \
3427 "Compiler Thread Stack Size (in Kbytes)") \
3428 \
3429 develop_pd(size_t, JVMInvokeMethodSlack, \
3430 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3431 \
3432 product(size_t, ThreadSafetyMargin, 50*M, \
3433 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
3434 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
3435 "disable this feature") \
3436 \
3437 /* code cache parameters */ \
3438 /* ppc64/tiered compilation has large code-entry alignment. */ \
3439 develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)),\
3440 "Code cache segment size (in bytes) - smallest unit of " \
3441 "allocation") \
3442 range(1, 1024) \
3443 \
3444 develop_pd(intx, CodeEntryAlignment, \
3445 "Code entry alignment for generated code (in bytes)") \
3446 \
3447 product_pd(intx, OptoLoopAlignment, \
3448 "Align inner loops to zero relative to this modulus") \
3449 \
3450 product_pd(uintx, InitialCodeCacheSize, \
3451 "Initial code cache size (in bytes)") \
3452 \
3453 develop_pd(uintx, CodeCacheMinimumUseSpace, \
3454 "Minimum code cache size (in bytes) required to start VM.") \
3455 \
3456 product(bool, SegmentedCodeCache, false, \
3457 "Use a segmented code cache") \
3458 \
3459 product_pd(uintx, ReservedCodeCacheSize, \
3460 "Reserved code cache size (in bytes) - maximum code cache size") \
3461 \
3462 product_pd(uintx, NonProfiledCodeHeapSize, \
3463 "Size of code heap with non-profiled methods (in bytes)") \
3464 \
3465 product_pd(uintx, ProfiledCodeHeapSize, \
3466 "Size of code heap with profiled methods (in bytes)") \
3467 \
3468 product_pd(uintx, NonNMethodCodeHeapSize, \
3469 "Size of code heap with non-nmethods (in bytes)") \
3470 \
3471 product_pd(uintx, CodeCacheExpansionSize, \
3472 "Code cache expansion size (in bytes)") \
3473 \
3474 develop_pd(uintx, CodeCacheMinBlockLength, \
3475 "Minimum number of segments in a code cache block") \
3476 range(1, 100) \
3477 \
3478 notproduct(bool, ExitOnFullCodeCache, false, \
3479 "Exit the VM if we fill the code cache") \
3480 \
3481 product(bool, UseCodeCacheFlushing, true, \
3482 "Remove cold/old nmethods from the code cache") \
3483 \
3484 product(uintx, StartAggressiveSweepingAt, 10, \
3485 "Start aggressive sweeping if X[%] of the code cache is free." \
3486 "Segmented code cache: X[%] of the non-profiled heap." \
3487 "Non-segmented code cache: X[%] of the total code cache") \
3488 range(0, 100) \
3489 \
3490 /* interpreter debugging */ \
3491 develop(intx, BinarySwitchThreshold, 5, \
3492 "Minimal number of lookupswitch entries for rewriting to binary " \
3493 "switch") \
3494 \
3495 develop(intx, StopInterpreterAt, 0, \
3496 "Stop interpreter execution at specified bytecode number") \
3497 \
3498 develop(intx, TraceBytecodesAt, 0, \
3499 "Trace bytecodes starting with specified bytecode number") \
3500 \
3501 /* compiler interface */ \
3502 develop(intx, CIStart, 0, \
3503 "The id of the first compilation to permit") \
3504 \
3505 develop(intx, CIStop, max_jint, \
3506 "The id of the last compilation to permit") \
3507 \
3508 develop(intx, CIStartOSR, 0, \
3509 "The id of the first osr compilation to permit " \
3510 "(CICountOSR must be on)") \
3511 \
3512 develop(intx, CIStopOSR, max_jint, \
3513 "The id of the last osr compilation to permit " \
3514 "(CICountOSR must be on)") \
3515 \
3516 develop(intx, CIBreakAtOSR, -1, \
3517 "The id of osr compilation to break at") \
3518 \
3519 develop(intx, CIBreakAt, -1, \
3520 "The id of compilation to break at") \
3521 \
3522 product(ccstrlist, CompileOnly, "", \
3523 "List of methods (pkg/class.name) to restrict compilation to") \
3524 \
3525 product(ccstr, CompileCommandFile, NULL, \
3526 "Read compiler commands from this file [.hotspot_compiler]") \
3527 \
3528 product(ccstrlist, CompileCommand, "", \
3529 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3530 \
3531 develop(bool, ReplayCompiles, false, \
3532 "Enable replay of compilations from ReplayDataFile") \
3533 \
3534 product(ccstr, ReplayDataFile, NULL, \
3535 "File containing compilation replay information" \
3536 "[default: ./replay_pid%p.log] (%p replaced with pid)") \
3537 \
3538 product(ccstr, InlineDataFile, NULL, \
3539 "File containing inlining replay information" \
3540 "[default: ./inline_pid%p.log] (%p replaced with pid)") \
3541 \
3542 develop(intx, ReplaySuppressInitializers, 2, \
3543 "Control handling of class initialization during replay: " \
3544 "0 - don't do anything special; " \
3545 "1 - treat all class initializers as empty; " \
3546 "2 - treat class initializers for application classes as empty; " \
3547 "3 - allow all class initializers to run during bootstrap but " \
3548 " pretend they are empty after starting replay") \
3549 range(0, 3) \
3550 \
3551 develop(bool, ReplayIgnoreInitErrors, false, \
3552 "Ignore exceptions thrown during initialization for replay") \
3553 \
3554 product(bool, DumpReplayDataOnError, true, \
3555 "Record replay data for crashing compiler threads") \
3556 \
3557 product(bool, CICompilerCountPerCPU, false, \
3558 "1 compiler thread for log(N CPUs)") \
3559 \
3560 develop(intx, CIFireOOMAt, -1, \
3561 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3562 "(non-negative value throws OOM after this many CI accesses " \
3563 "in each compile)") \
3564 notproduct(intx, CICrashAt, -1, \
3565 "id of compilation to trigger assert in compiler thread for " \
3566 "the purpose of testing, e.g. generation of replay data") \
3567 notproduct(bool, CIObjectFactoryVerify, false, \
3568 "enable potentially expensive verification in ciObjectFactory") \
3569 \
3570 /* Priorities */ \
3571 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3572 \
3573 product(intx, ThreadPriorityPolicy, 0, \
3574 "0 : Normal. "\
3575 " VM chooses priorities that are appropriate for normal "\
3576 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3577 " to normal native priority. Java priorities below " \
3578 " NORM_PRIORITY map to lower native priority values. On "\
3579 " Windows applications are allowed to use higher native "\
3580 " priorities. However, with ThreadPriorityPolicy=0, VM will "\
3581 " not use the highest possible native priority, "\
3582 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\
3583 " system threads. On Linux thread priorities are ignored "\
3584 " because the OS does not support static priority in "\
3585 " SCHED_OTHER scheduling class which is the only choice for "\
3586 " non-root, non-realtime applications. "\
3587 "1 : Aggressive. "\
3588 " Java thread priorities map over to the entire range of "\
3589 " native thread priorities. Higher Java thread priorities map "\
3590 " to higher native thread priorities. This policy should be "\
3591 " used with care, as sometimes it can cause performance "\
3592 " degradation in the application and/or the entire system. On "\
3593 " Linux this policy requires root privilege.") \
3594 range(0, 1) \
3595 \
3596 product(bool, ThreadPriorityVerbose, false, \
3597 "Print priority changes") \
3598 \
3599 product(intx, CompilerThreadPriority, -1, \
3600 "The native priority at which compiler threads should run " \
3601 "(-1 means no change)") \
3602 \
3603 product(intx, VMThreadPriority, -1, \
3604 "The native priority at which the VM thread should run " \
3605 "(-1 means no change)") \
3606 \
3607 product(bool, CompilerThreadHintNoPreempt, true, \
3608 "(Solaris only) Give compiler threads an extra quanta") \
3609 \
3610 product(bool, VMThreadHintNoPreempt, false, \
3611 "(Solaris only) Give VM thread an extra quanta") \
3612 \
3613 product(intx, JavaPriority1_To_OSPriority, -1, \
3614 "Map Java priorities to OS priorities") \
3615 \
3616 product(intx, JavaPriority2_To_OSPriority, -1, \
3617 "Map Java priorities to OS priorities") \
3618 \
3619 product(intx, JavaPriority3_To_OSPriority, -1, \
3620 "Map Java priorities to OS priorities") \
3621 \
3622 product(intx, JavaPriority4_To_OSPriority, -1, \
3623 "Map Java priorities to OS priorities") \
3624 \
3625 product(intx, JavaPriority5_To_OSPriority, -1, \
3626 "Map Java priorities to OS priorities") \
3627 \
3628 product(intx, JavaPriority6_To_OSPriority, -1, \
3629 "Map Java priorities to OS priorities") \
3630 \
3631 product(intx, JavaPriority7_To_OSPriority, -1, \
3632 "Map Java priorities to OS priorities") \
3633 \
3634 product(intx, JavaPriority8_To_OSPriority, -1, \
3635 "Map Java priorities to OS priorities") \
3636 \
3637 product(intx, JavaPriority9_To_OSPriority, -1, \
3638 "Map Java priorities to OS priorities") \
3639 \
3640 product(intx, JavaPriority10_To_OSPriority,-1, \
3641 "Map Java priorities to OS priorities") \
3642 \
3643 experimental(bool, UseCriticalJavaThreadPriority, false, \
3644 "Java thread priority 10 maps to critical scheduling priority") \
3645 \
3646 experimental(bool, UseCriticalCompilerThreadPriority, false, \
3647 "Compiler thread(s) run at critical scheduling priority") \
3648 \
3649 experimental(bool, UseCriticalCMSThreadPriority, false, \
3650 "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3651 \
3652 /* compiler debugging */ \
3653 notproduct(intx, CompileTheWorldStartAt, 1, \
3654 "First class to consider when using +CompileTheWorld") \
3655 \
3656 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3657 "Last class to consider when using +CompileTheWorld") \
3658 \
3659 develop(intx, NewCodeParameter, 0, \
3660 "Testing Only: Create a dedicated integer parameter before " \
3661 "putback") \
3662 \
3663 /* new oopmap storage allocation */ \
3664 develop(intx, MinOopMapAllocation, 8, \
3665 "Minimum number of OopMap entries in an OopMapSet") \
3666 \
3667 /* Background Compilation */ \
3668 develop(intx, LongCompileThreshold, 50, \
3669 "Used with +TraceLongCompiles") \
3670 \
3671 product(intx, StarvationMonitorInterval, 200, \
3672 "Pause between each check (in milliseconds)") \
3673 \
3674 /* recompilation */ \
3675 product_pd(intx, CompileThreshold, \
3676 "number of interpreted method invocations before (re-)compiling") \
3677 \
3678 product(double, CompileThresholdScaling, 1.0, \
3679 "Factor to control when first compilation happens " \
3680 "(both with and without tiered compilation): " \
3681 "values greater than 1.0 delay counter overflow, " \
3682 "values between 0 and 1.0 rush counter overflow, " \
3683 "value of 1.0 leaves compilation thresholds unchanged " \
3684 "value of 0.0 is equivalent to -Xint. " \
3685 "" \
3686 "Flag can be set as per-method option. " \
3687 "If a value is specified for a method, compilation thresholds " \
3688 "for that method are scaled by both the value of the global flag "\
3689 "and the value of the per-method flag.") \
3690 \
3691 product(intx, Tier0InvokeNotifyFreqLog, 7, \
3692 "Interpreter (tier 0) invocation notification frequency") \
3693 \
3694 product(intx, Tier2InvokeNotifyFreqLog, 11, \
3695 "C1 without MDO (tier 2) invocation notification frequency") \
3696 \
3697 product(intx, Tier3InvokeNotifyFreqLog, 10, \
3698 "C1 with MDO profiling (tier 3) invocation notification " \
3699 "frequency") \
3700 \
3701 product(intx, Tier23InlineeNotifyFreqLog, 20, \
3702 "Inlinee invocation (tiers 2 and 3) notification frequency") \
3703 \
3704 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
3705 "Interpreter (tier 0) invocation notification frequency") \
3706 \
3707 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
3708 "C1 without MDO (tier 2) invocation notification frequency") \
3709 \
3710 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
3711 "C1 with MDO profiling (tier 3) invocation notification " \
3712 "frequency") \
3713 \
3714 product(intx, Tier2CompileThreshold, 0, \
3715 "threshold at which tier 2 compilation is invoked") \
3716 \
3717 product(intx, Tier2BackEdgeThreshold, 0, \
3718 "Back edge threshold at which tier 2 compilation is invoked") \
3719 \
3720 product(intx, Tier3InvocationThreshold, 200, \
3721 "Compile if number of method invocations crosses this " \
3722 "threshold") \
3723 \
3724 product(intx, Tier3MinInvocationThreshold, 100, \
3725 "Minimum invocation to compile at tier 3") \
3726 \
3727 product(intx, Tier3CompileThreshold, 2000, \
3728 "Threshold at which tier 3 compilation is invoked (invocation " \
3729 "minimum must be satisfied") \
3730 \
3731 product(intx, Tier3BackEdgeThreshold, 60000, \
3732 "Back edge threshold at which tier 3 OSR compilation is invoked") \
3733 \
3734 product(intx, Tier4InvocationThreshold, 5000, \
3735 "Compile if number of method invocations crosses this " \
3736 "threshold") \
3737 \
3738 product(intx, Tier4MinInvocationThreshold, 600, \
3739 "Minimum invocation to compile at tier 4") \
3740 \
3741 product(intx, Tier4CompileThreshold, 15000, \
3742 "Threshold at which tier 4 compilation is invoked (invocation " \
3743 "minimum must be satisfied") \
3744 \
3745 product(intx, Tier4BackEdgeThreshold, 40000, \
3746 "Back edge threshold at which tier 4 OSR compilation is invoked") \
3747 \
3748 product(intx, Tier3DelayOn, 5, \
3749 "If C2 queue size grows over this amount per compiler thread " \
3750 "stop compiling at tier 3 and start compiling at tier 2") \
3751 \
3752 product(intx, Tier3DelayOff, 2, \
3753 "If C2 queue size is less than this amount per compiler thread " \
3754 "allow methods compiled at tier 2 transition to tier 3") \
3755 \
3756 product(intx, Tier3LoadFeedback, 5, \
3757 "Tier 3 thresholds will increase twofold when C1 queue size " \
3758 "reaches this amount per compiler thread") \
3759 \
3760 product(intx, Tier4LoadFeedback, 3, \
3761 "Tier 4 thresholds will increase twofold when C2 queue size " \
3762 "reaches this amount per compiler thread") \
3763 \
3764 product(intx, TieredCompileTaskTimeout, 50, \
3765 "Kill compile task if method was not used within " \
3766 "given timeout in milliseconds") \
3767 \
3768 product(intx, TieredStopAtLevel, 4, \
3769 "Stop at given compilation level") \
3770 \
3771 product(intx, Tier0ProfilingStartPercentage, 200, \
3772 "Start profiling in interpreter if the counters exceed tier 3 " \
3773 "thresholds by the specified percentage") \
3774 \
3775 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \
3776 "Increase the compile threshold for C1 compilation if the code " \
3777 "cache is filled by the specified percentage") \
3778 range(0, 99) \
3779 \
3780 product(intx, TieredRateUpdateMinTime, 1, \
3781 "Minimum rate sampling interval (in milliseconds)") \
3782 \
3783 product(intx, TieredRateUpdateMaxTime, 25, \
3784 "Maximum rate sampling interval (in milliseconds)") \
3785 \
3786 product_pd(bool, TieredCompilation, \
3787 "Enable tiered compilation") \
3788 \
3789 product(bool, PrintTieredEvents, false, \
3790 "Print tiered events notifications") \
3791 \
3792 product_pd(intx, OnStackReplacePercentage, \
3793 "NON_TIERED number of method invocations/branches (expressed as " \
3794 "% of CompileThreshold) before (re-)compiling OSR code") \
3795 \
3796 product(intx, InterpreterProfilePercentage, 33, \
3797 "NON_TIERED number of method invocations/branches (expressed as " \
3798 "% of CompileThreshold) before profiling in the interpreter") \
3799 range(0, 100) \
3800 \
3801 develop(intx, MaxRecompilationSearchLength, 10, \
3802 "The maximum number of frames to inspect when searching for " \
3803 "recompilee") \
3804 \
3805 develop(intx, MaxInterpretedSearchLength, 3, \
3806 "The maximum number of interpreted frames to skip when searching "\
3807 "for recompilee") \
3808 \
3809 develop(intx, DesiredMethodLimit, 8000, \
3810 "The desired maximum method size (in bytecodes) after inlining") \
3811 \
3812 develop(intx, HugeMethodLimit, 8000, \
3813 "Don't compile methods larger than this if " \
3814 "+DontCompileHugeMethods") \
3815 \
3816 /* New JDK 1.4 reflection implementation */ \
3817 \
3818 develop(intx, FastSuperclassLimit, 8, \
3819 "Depth of hardwired instanceof accelerator array") \
3820 \
3821 /* Properties for Java libraries */ \
3822 \
3823 product(size_t, MaxDirectMemorySize, 0, \
3824 "Maximum total size of NIO direct-buffer allocations") \
3825 \
3826 /* Flags used for temporary code during development */ \
3827 \
3828 diagnostic(bool, UseNewCode, false, \
3829 "Testing Only: Use the new version while testing") \
3830 \
3831 diagnostic(bool, UseNewCode2, false, \
3832 "Testing Only: Use the new version while testing") \
3833 \
3834 diagnostic(bool, UseNewCode3, false, \
3835 "Testing Only: Use the new version while testing") \
3836 \
3837 /* flags for performance data collection */ \
3838 \
3839 product(bool, UsePerfData, falseInEmbedded, \
3840 "Flag to disable jvmstat instrumentation for performance testing "\
3841 "and problem isolation purposes") \
3842 \
3843 product(bool, PerfDataSaveToFile, false, \
3844 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3845 \
3846 product(ccstr, PerfDataSaveFile, NULL, \
3847 "Save PerfData memory to the specified absolute pathname. " \
3848 "The string %p in the file name (if present) " \
3849 "will be replaced by pid") \
3850 \
3851 product(intx, PerfDataSamplingInterval, 50, \
3852 "Data sampling interval (in milliseconds)") \
3853 \
3854 develop(bool, PerfTraceDataCreation, false, \
3855 "Trace creation of Performance Data Entries") \
3856 \
3857 develop(bool, PerfTraceMemOps, false, \
3858 "Trace PerfMemory create/attach/detach calls") \
3859 \
3860 product(bool, PerfDisableSharedMem, false, \
3861 "Store performance data in standard memory") \
3862 \
3863 product(intx, PerfDataMemorySize, 32*K, \
3864 "Size of performance data memory region. Will be rounded " \
3865 "up to a multiple of the native os page size.") \
3866 \
3867 product(intx, PerfMaxStringConstLength, 1024, \
3868 "Maximum PerfStringConstant string length before truncation") \
3869 \
3870 product(bool, PerfAllowAtExitRegistration, false, \
3871 "Allow registration of atexit() methods") \
3872 \
3873 product(bool, PerfBypassFileSystemCheck, false, \
3874 "Bypass Win32 file system criteria checks (Windows Only)") \
3875 \
3876 product(intx, UnguardOnExecutionViolation, 0, \
3877 "Unguard page and retry on no-execute fault (Win32 only) " \
3878 "0=off, 1=conservative, 2=aggressive") \
3879 range(0, 2) \
3880 \
3881 /* Serviceability Support */ \
3882 \
3883 product(bool, ManagementServer, false, \
3884 "Create JMX Management Server") \
3885 \
3886 product(bool, DisableAttachMechanism, false, \
3887 "Disable mechanism that allows tools to attach to this VM") \
3888 \
3889 product(bool, StartAttachListener, false, \
3890 "Always start Attach Listener at VM startup") \
3891 \
3892 manageable(bool, PrintConcurrentLocks, false, \
3893 "Print java.util.concurrent locks in thread dump") \
3894 \
3895 product(bool, TransmitErrorReport, false, \
3896 "Enable error report transmission on erroneous termination") \
3897 \
3898 product(ccstr, ErrorReportServer, NULL, \
3899 "Override built-in error report server address") \
3900 \
3901 /* Shared spaces */ \
3902 \
3903 product(bool, UseSharedSpaces, true, \
3904 "Use shared spaces for metadata") \
3905 \
3906 product(bool, VerifySharedSpaces, false, \
3907 "Verify shared spaces (false for default archive, true for " \
3908 "archive specified by -XX:SharedArchiveFile)") \
3909 \
3910 product(bool, RequireSharedSpaces, false, \
3911 "Require shared spaces for metadata") \
3912 \
3913 product(bool, DumpSharedSpaces, false, \
3914 "Special mode: JVM reads a class list, loads classes, builds " \
3915 "shared spaces, and dumps the shared spaces to a file to be " \
3916 "used in future JVM runs") \
3917 \
3918 product(bool, PrintSharedSpaces, false, \
3919 "Print usage of shared spaces") \
3920 \
3921 product(bool, PrintSharedArchiveAndExit, false, \
3922 "Print shared archive file contents") \
3923 \
3924 product(bool, PrintSharedDictionary, false, \
3925 "If PrintSharedArchiveAndExit is true, also print the shared " \
3926 "dictionary") \
3927 \
3928 product(size_t, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3929 "Size of read-write space for metadata (in bytes)") \
3930 \
3931 product(size_t, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3932 "Size of read-only space for metadata (in bytes)") \
3933 \
3934 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \
3935 "Size of the shared miscellaneous data area (in bytes)") \
3936 \
3937 product(uintx, SharedMiscCodeSize, 120*K, \
3938 "Size of the shared miscellaneous code area (in bytes)") \
3939 \
3940 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \
3941 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \
3942 "Address to allocate shared memory region for class data") \
3943 \
3944 product(uintx, SharedSymbolTableBucketSize, 4, \
3945 "Average number of symbols per bucket in shared table") \
3946 \
3947 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \
3948 "Do not quit -Xshare:dump even if we encounter unverifiable " \
3949 "classes. Just exclude them from the shared dictionary.") \
3950 \
3951 diagnostic(bool, PrintMethodHandleStubs, false, \
3952 "Print generated stub code for method handles") \
3953 \
3954 develop(bool, TraceMethodHandles, false, \
3955 "trace internal method handle operations") \
3956 \
3957 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
3958 "perform extra checks when constructing method handles") \
3959 \
3960 diagnostic(bool, ShowHiddenFrames, false, \
3961 "show method handle implementation frames (usually hidden)") \
3962 \
3963 experimental(bool, TrustFinalNonStaticFields, false, \
3964 "trust final non-static declarations for constant folding") \
3965 \
3966 diagnostic(bool, FoldStableValues, true, \
3967 "Optimize loads from stable fields (marked w/ @Stable)") \
3968 \
3969 develop(bool, TraceInvokeDynamic, false, \
3970 "trace internal invoke dynamic operations") \
3971 \
3972 diagnostic(bool, PauseAtStartup, false, \
3973 "Causes the VM to pause at startup time and wait for the pause " \
3974 "file to be removed (default: ./vm.paused.<pid>)") \
3975 \
3976 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3977 "The file to create and for whose removal to await when pausing " \
3978 "at startup. (default: ./vm.paused.<pid>)") \
3979 \
3980 diagnostic(bool, PauseAtExit, false, \
3981 "Pause and wait for keypress on exit if a debugger is attached") \
3982 \
3983 product(bool, ExtendedDTraceProbes, false, \
3984 "Enable performance-impacting dtrace probes") \
3985 \
3986 product(bool, DTraceMethodProbes, false, \
3987 "Enable dtrace probes for method-entry and method-exit") \
3988 \
3989 product(bool, DTraceAllocProbes, false, \
3990 "Enable dtrace probes for object allocation") \
3991 \
3992 product(bool, DTraceMonitorProbes, false, \
3993 "Enable dtrace probes for monitor events") \
3994 \
3995 product(bool, RelaxAccessControlCheck, false, \
3996 "Relax the access control checks in the verifier") \
3997 \
3998 product(uintx, StringTableSize, defaultStringTableSize, \
3999 "Number of buckets in the interned String table") \
4000 range(minimumStringTableSize, 111*defaultStringTableSize) \
4001 \
4002 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \
4003 "Number of buckets in the JVM internal Symbol table") \
4004 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \
4005 \
4006 product(bool, UseStringDeduplication, false, \
4007 "Use string deduplication") \
4008 \
4009 product(bool, PrintStringDeduplicationStatistics, false, \
4010 "Print string deduplication statistics") \
4011 \
4012 product(uintx, StringDeduplicationAgeThreshold, 3, \
4013 "A string must reach this age (or be promoted to an old region) " \
4014 "to be considered for deduplication") \
4015 range(1, markOopDesc::max_age) \
4016 \
4017 diagnostic(bool, StringDeduplicationResizeALot, false, \
4018 "Force table resize every time the table is scanned") \
4019 \
4020 diagnostic(bool, StringDeduplicationRehashALot, false, \
4021 "Force table rehash every time the table is scanned") \
4022 \
4023 develop(bool, TraceDefaultMethods, false, \
4024 "Trace the default method processing steps") \
4025 \
4026 develop(bool, VerifyGenericSignatures, false, \
4027 "Abort VM on erroneous or inconsistent generic signatures") \
4028 \
4029 diagnostic(bool, WhiteBoxAPI, false, \
4030 "Enable internal testing APIs") \
4031 \
4032 product(bool, PrintGCCause, true, \
4033 "Include GC cause in GC logging") \
4034 \
4035 experimental(intx, SurvivorAlignmentInBytes, 0, \
4036 "Default survivor space alignment in bytes") \
4037 constraint(SurvivorAlignmentInBytesConstraintFunc) \
4038 \
4039 product(bool , AllowNonVirtualCalls, false, \
4040 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \
4041 \
4042 product(ccstr, DumpLoadedClassList, NULL, \
4043 "Dump the names all loaded classes, that could be stored into " \
4044 "the CDS archive, in the specified file") \
4045 \
4046 product(ccstr, SharedClassListFile, NULL, \
4047 "Override the default CDS class list") \
4048 \
4049 diagnostic(ccstr, SharedArchiveFile, NULL, \
4050 "Override the default location of the CDS archive file") \
4051 \
4052 product(ccstr, ExtraSharedClassListFile, NULL, \
4053 "Extra classlist for building the CDS archive file") \
4054 \
4055 experimental(size_t, ArrayAllocatorMallocLimit, \
4056 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \
4057 "Allocation less than this value will be allocated " \
4058 "using malloc. Larger allocations will use mmap.") \
4059 \
4060 experimental(bool, AlwaysAtomicAccesses, false, \
4061 "Accesses to all variables should always be atomic") \
4062 \
4063 product(bool, EnableTracing, false, \
4064 "Enable event-based tracing") \
4065 \
4066 product(bool, UseLockedTracing, false, \
4067 "Use locked-tracing when doing event-based tracing") \
4068 \
4069 diagnostic(bool, UseUnalignedAccesses, false, \
4070 "Use unaligned memory accesses in sun.misc.Unsafe") \
4071 \
4072 product_pd(bool, PreserveFramePointer, \
4073 "Use the FP register for holding the frame pointer " \
4074 "and not as a general purpose register.")
4075
4076 /*
4077 * Macros for factoring of globals
4078 */
4079
4080 // Interface macros
4081 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4082 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
4083 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
4084 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
4085 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
4086 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
4087 #ifdef PRODUCT
4088 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value;
4089 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name;
4090 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name;
4091 #else
4092 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
4093 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
4094 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4095 #endif // PRODUCT
4096 // Special LP64 flags, product only needed for now.
4097 #ifdef _LP64
4098 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
4099 #else
4100 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
4101 #endif // _LP64
4102
4103 // Implementation macros
4104 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
4105 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
4106 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
4107 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
4108 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
4109 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
4110 #ifdef PRODUCT
4111 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value;
4112 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name;
4113 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value;
4114 #else
4115 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
4116 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
4117 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
4118 #endif // PRODUCT
4119 #ifdef _LP64
4120 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
4121 #else
4122 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
4123 #endif // _LP64
4124
4125 // Only materialize src code for range checking when required, ignore otherwise
4126 #define IGNORE_RANGE(a, b)
4127 // Only materialize src code for contraint checking when required, ignore otherwise
4128 #define IGNORE_CONSTRAINT(func)
4129
4130 RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \
4131 DECLARE_PD_DEVELOPER_FLAG, \
4132 DECLARE_PRODUCT_FLAG, \
4133 DECLARE_PD_PRODUCT_FLAG, \
4134 DECLARE_DIAGNOSTIC_FLAG, \
4135 DECLARE_EXPERIMENTAL_FLAG, \
4136 DECLARE_NOTPRODUCT_FLAG, \
4137 DECLARE_MANAGEABLE_FLAG, \
4138 DECLARE_PRODUCT_RW_FLAG, \
4139 DECLARE_LP64_PRODUCT_FLAG, \
4140 IGNORE_RANGE, \
4141 IGNORE_CONSTRAINT)
4142
4143 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \
4144 DECLARE_PD_DEVELOPER_FLAG, \
4145 DECLARE_PRODUCT_FLAG, \
4146 DECLARE_PD_PRODUCT_FLAG, \
4147 DECLARE_DIAGNOSTIC_FLAG, \
4148 DECLARE_NOTPRODUCT_FLAG, \
4149 IGNORE_RANGE, \
4150 IGNORE_CONSTRAINT)
4151
4152 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \
4153 DECLARE_PRODUCT_FLAG, \
4154 DECLARE_DIAGNOSTIC_FLAG, \
4155 DECLARE_EXPERIMENTAL_FLAG, \
4156 DECLARE_NOTPRODUCT_FLAG, \
4157 IGNORE_RANGE, \
4158 IGNORE_CONSTRAINT)
4159
4160 // Extensions
4161
4162 #include "runtime/globals_ext.hpp"
4163
4164 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP