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