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