1 /*
2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #if !defined(COMPILER1) && !defined(COMPILER2)
26 define_pd_global(bool, BackgroundCompilation, false);
27 define_pd_global(bool, UseTLAB, false);
28 define_pd_global(bool, CICompileOSR, false);
29 define_pd_global(bool, UseTypeProfile, false);
30 define_pd_global(bool, UseOnStackReplacement, false);
31 define_pd_global(bool, InlineIntrinsics, false);
32 define_pd_global(bool, PreferInterpreterNativeStubs, true);
33 define_pd_global(bool, ProfileInterpreter, false);
34 define_pd_global(bool, ProfileTraps, false);
35 define_pd_global(bool, TieredCompilation, false);
36
37 define_pd_global(intx, CompileThreshold, 0);
38 define_pd_global(intx, Tier2CompileThreshold, 0);
39 define_pd_global(intx, Tier3CompileThreshold, 0);
40 define_pd_global(intx, Tier4CompileThreshold, 0);
41
42 define_pd_global(intx, BackEdgeThreshold, 0);
43 define_pd_global(intx, Tier2BackEdgeThreshold, 0);
44 define_pd_global(intx, Tier3BackEdgeThreshold, 0);
45 define_pd_global(intx, Tier4BackEdgeThreshold, 0);
46
47 define_pd_global(intx, OnStackReplacePercentage, 0);
48 define_pd_global(bool, ResizeTLAB, false);
49 define_pd_global(intx, FreqInlineSize, 0);
50 define_pd_global(intx, InlineSmallCode, 0);
51 define_pd_global(intx, NewSizeThreadIncrease, 4*K);
52 define_pd_global(intx, InlineClassNatives, true);
53 define_pd_global(intx, InlineUnsafeOps, true);
54 define_pd_global(intx, InitialCodeCacheSize, 160*K);
55 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
56 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
57 define_pd_global(intx, CodeCacheMinBlockLength, 1);
58 define_pd_global(uintx,PermSize, ScaleForWordSize(4*M));
59 define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M));
60 define_pd_global(bool, NeverActAsServerClassMachine, true);
61 define_pd_global(uint64_t,MaxRAM, 1ULL*G);
62 #define CI_COMPILER_COUNT 0
63 #else
64
65 #ifdef COMPILER2
66 #define CI_COMPILER_COUNT 2
67 #else
68 #define CI_COMPILER_COUNT 1
69 #endif // COMPILER2
70
71 #endif // no compilers
72
73
74 // string type aliases used only in this file
75 typedef const char* ccstr;
76 typedef const char* ccstrlist; // represents string arguments which accumulate
77
78 enum FlagValueOrigin {
79 DEFAULT = 0,
80 COMMAND_LINE = 1,
81 ENVIRON_VAR = 2,
82 CONFIG_FILE = 3,
83 MANAGEMENT = 4,
84 ERGONOMIC = 5,
85 ATTACH_ON_DEMAND = 6,
86 INTERNAL = 99
87 };
88
89 struct Flag {
90 const char *type;
91 const char *name;
92 void* addr;
93 const char *kind;
94 FlagValueOrigin origin;
95
96 // points to all Flags static array
97 static Flag *flags;
98
99 // number of flags
100 static size_t numFlags;
101
102 static Flag* find_flag(char* name, size_t length);
103
104 bool is_bool() const { return strcmp(type, "bool") == 0; }
105 bool get_bool() const { return *((bool*) addr); }
106 void set_bool(bool value) { *((bool*) addr) = value; }
107
108 bool is_intx() const { return strcmp(type, "intx") == 0; }
109 intx get_intx() const { return *((intx*) addr); }
110 void set_intx(intx value) { *((intx*) addr) = value; }
111
112 bool is_uintx() const { return strcmp(type, "uintx") == 0; }
113 uintx get_uintx() const { return *((uintx*) addr); }
114 void set_uintx(uintx value) { *((uintx*) addr) = value; }
115
116 bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; }
117 uint64_t get_uint64_t() const { return *((uint64_t*) addr); }
118 void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; }
119
120 bool is_double() const { return strcmp(type, "double") == 0; }
121 double get_double() const { return *((double*) addr); }
122 void set_double(double value) { *((double*) addr) = value; }
123
124 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; }
125 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; }
126 ccstr get_ccstr() const { return *((ccstr*) addr); }
127 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; }
128
129 bool is_unlocker() const;
130 bool is_unlocked() const;
131 bool is_writeable() const;
132 bool is_external() const;
133
134 void print_on(outputStream* st);
135 void print_as_flag(outputStream* st);
136 };
137
138 // debug flags control various aspects of the VM and are global accessible
139
140 // use FlagSetting to temporarily change some debug flag
141 // e.g. FlagSetting fs(DebugThisAndThat, true);
142 // restored to previous value upon leaving scope
143 class FlagSetting {
144 bool val;
145 bool* flag;
146 public:
147 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
148 ~FlagSetting() { *flag = val; }
149 };
150
151
152 class CounterSetting {
153 intx* counter;
154 public:
155 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
156 ~CounterSetting() { (*counter)--; }
157 };
158
159
160 class IntFlagSetting {
161 intx val;
162 intx* flag;
163 public:
164 IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; }
165 ~IntFlagSetting() { *flag = val; }
166 };
167
168
169 class DoubleFlagSetting {
170 double val;
171 double* flag;
172 public:
173 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
174 ~DoubleFlagSetting() { *flag = val; }
175 };
176
177
178 class CommandLineFlags {
179 public:
180 static bool boolAt(char* name, size_t len, bool* value);
181 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); }
182 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin);
183 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); }
184
185 static bool intxAt(char* name, size_t len, intx* value);
186 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); }
187 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin);
188 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); }
189
190 static bool uintxAt(char* name, size_t len, uintx* value);
191 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
192 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin);
193 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); }
194
195 static bool uint64_tAt(char* name, size_t len, uint64_t* value);
196 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
197 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin);
198 static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
199
200 static bool doubleAt(char* name, size_t len, double* value);
201 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); }
202 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin);
203 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); }
204
205 static bool ccstrAt(char* name, size_t len, ccstr* value);
206 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
207 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin);
208 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); }
209
210 // Returns false if name is not a command line flag.
211 static bool wasSetOnCmdline(const char* name, bool* value);
212 static void printSetFlags();
213
214 static void printFlags();
215
216 static void verify() PRODUCT_RETURN;
217 };
218
219 // use this for flags that are true by default in the debug version but
220 // false in the optimized version, and vice versa
221 #ifdef ASSERT
222 #define trueInDebug true
223 #define falseInDebug false
224 #else
225 #define trueInDebug false
226 #define falseInDebug true
227 #endif
228
229 // use this for flags that are true per default in the product build
230 // but false in development builds, and vice versa
231 #ifdef PRODUCT
232 #define trueInProduct true
233 #define falseInProduct false
234 #else
235 #define trueInProduct false
236 #define falseInProduct true
237 #endif
238
239 // use this for flags that are true per default in the tiered build
240 // but false in non-tiered builds, and vice versa
241 #ifdef TIERED
242 #define trueInTiered true
243 #define falseInTiered false
244 #else
245 #define trueInTiered false
246 #define falseInTiered true
247 #endif
248
249 // develop flags are settable / visible only during development and are constant in the PRODUCT version
250 // product flags are always settable / visible
251 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
252
253 // A flag must be declared with one of the following types:
254 // bool, intx, uintx, ccstr.
255 // The type "ccstr" is an alias for "const char*" and is used
256 // only in this file, because the macrology requires single-token type names.
257
258 // Note: Diagnostic options not meant for VM tuning or for product modes.
259 // They are to be used for VM quality assurance or field diagnosis
260 // of VM bugs. They are hidden so that users will not be encouraged to
261 // try them as if they were VM ordinary execution options. However, they
262 // are available in the product version of the VM. Under instruction
263 // from support engineers, VM customers can turn them on to collect
264 // diagnostic information about VM problems. To use a VM diagnostic
265 // option, you must first specify +UnlockDiagnosticVMOptions.
266 // (This master switch also affects the behavior of -Xprintflags.)
267 //
268 // experimental flags are in support of features that are not
269 // part of the officially supported product, but are available
270 // for experimenting with. They could, for example, be performance
271 // features that may not have undergone full or rigorous QA, but which may
272 // help performance in some cases and released for experimentation
273 // by the community of users and developers. This flag also allows one to
274 // be able to build a fully supported product that nonetheless also
275 // ships with some unsupported, lightly tested, experimental features.
276 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
277 // UnlockExperimentalVMOptions flag, which allows the control and
278 // modification of the experimental flags.
279 //
280 // manageable flags are writeable external product flags.
281 // They are dynamically writeable through the JDK management interface
282 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
283 // These flags are external exported interface (see CCC). The list of
284 // manageable flags can be queried programmatically through the management
285 // interface.
286 //
287 // A flag can be made as "manageable" only if
288 // - the flag is defined in a CCC as an external exported interface.
289 // - the VM implementation supports dynamic setting of the flag.
290 // This implies that the VM must *always* query the flag variable
291 // and not reuse state related to the flag state at any given time.
292 // - you want the flag to be queried programmatically by the customers.
293 //
294 // product_rw flags are writeable internal product flags.
295 // They are like "manageable" flags but for internal/private use.
296 // The list of product_rw flags are internal/private flags which
297 // may be changed/removed in a future release. It can be set
298 // through the management interface to get/set value
299 // when the name of flag is supplied.
300 //
301 // A flag can be made as "product_rw" only if
302 // - the VM implementation supports dynamic setting of the flag.
303 // This implies that the VM must *always* query the flag variable
304 // and not reuse state related to the flag state at any given time.
305 //
306 // Note that when there is a need to support develop flags to be writeable,
307 // it can be done in the same way as product_rw.
308
309 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
310 \
311 lp64_product(bool, UseCompressedOops, false, \
312 "Use 32-bit object references in 64-bit VM. " \
313 "lp64_product means flag is always constant in 32 bit VM") \
314 \
315 notproduct(bool, CheckCompressedOops, true, \
316 "generate checks in encoding/decoding code in debug VM") \
317 \
318 product_pd(uintx, HeapBaseMinAddress, \
319 "OS specific low limit for heap base address") \
320 \
321 diagnostic(bool, PrintCompressedOopsMode, false, \
322 "Print compressed oops base address and encoding mode") \
323 \
324 /* UseMembar is theoretically a temp flag used for memory barrier \
325 * removal testing. It was supposed to be removed before FCS but has \
326 * been re-added (see 6401008) */ \
327 product(bool, UseMembar, false, \
328 "(Unstable) Issues membars on thread state transitions") \
329 \
330 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
331 "Enable normal processing of flags relating to field diagnostics")\
332 \
333 experimental(bool, UnlockExperimentalVMOptions, false, \
334 "Enable normal processing of flags relating to experimental features")\
335 \
336 product(bool, JavaMonitorsInStackTrace, true, \
337 "Print info. about Java monitor locks when the stacks are dumped")\
338 \
339 product_pd(bool, UseLargePages, \
340 "Use large page memory") \
341 \
342 product_pd(bool, UseLargePagesIndividualAllocation, \
343 "Allocate large pages individually for better affinity") \
344 \
345 develop(bool, LargePagesIndividualAllocationInjectError, false, \
346 "Fail large pages individual allocation") \
347 \
348 develop(bool, TracePageSizes, false, \
349 "Trace page size selection and usage.") \
350 \
351 product(bool, UseNUMA, false, \
352 "Use NUMA if available") \
353 \
354 product(bool, ForceNUMA, false, \
355 "Force NUMA optimizations on single-node/UMA systems") \
356 \
357 product(intx, NUMAChunkResizeWeight, 20, \
358 "Percentage (0-100) used to weight the current sample when " \
359 "computing exponentially decaying average for " \
360 "AdaptiveNUMAChunkSizing") \
361 \
362 product(intx, NUMASpaceResizeRate, 1*G, \
363 "Do not reallocate more that this amount per collection") \
364 \
365 product(bool, UseAdaptiveNUMAChunkSizing, true, \
366 "Enable adaptive chunk sizing for NUMA") \
367 \
368 product(bool, NUMAStats, false, \
369 "Print NUMA stats in detailed heap information") \
370 \
371 product(intx, NUMAPageScanRate, 256, \
372 "Maximum number of pages to include in the page scan procedure") \
373 \
374 product_pd(bool, NeedsDeoptSuspend, \
375 "True for register window machines (sparc/ia64)") \
376 \
377 product(intx, UseSSE, 99, \
378 "Highest supported SSE instructions set on x86/x64") \
379 \
380 product(uintx, LargePageSizeInBytes, 0, \
381 "Large page size (0 to let VM choose the page size") \
382 \
383 product(uintx, LargePageHeapSizeThreshold, 128*M, \
384 "Use large pages if max heap is at least this big") \
385 \
386 product(bool, ForceTimeHighResolution, false, \
387 "Using high time resolution(For Win32 only)") \
388 \
389 develop(bool, TraceItables, false, \
390 "Trace initialization and use of itables") \
391 \
392 develop(bool, TracePcPatching, false, \
393 "Trace usage of frame::patch_pc") \
394 \
395 develop(bool, TraceJumps, false, \
396 "Trace assembly jumps in thread ring buffer") \
397 \
398 develop(bool, TraceRelocator, false, \
399 "Trace the bytecode relocator") \
400 \
401 develop(bool, TraceLongCompiles, false, \
402 "Print out every time compilation is longer than " \
403 "a given threashold") \
404 \
405 develop(bool, SafepointALot, false, \
406 "Generates a lot of safepoints. Works with " \
407 "GuaranteedSafepointInterval") \
408 \
409 product_pd(bool, BackgroundCompilation, \
410 "A thread requesting compilation is not blocked during " \
411 "compilation") \
412 \
413 product(bool, PrintVMQWaitTime, false, \
414 "Prints out the waiting time in VM operation queue") \
415 \
416 develop(bool, BailoutToInterpreterForThrows, false, \
417 "Compiled methods which throws/catches exceptions will be " \
418 "deopt and intp.") \
419 \
420 develop(bool, NoYieldsInMicrolock, false, \
421 "Disable yields in microlock") \
422 \
423 develop(bool, TraceOopMapGeneration, false, \
424 "Shows oopmap generation") \
425 \
426 product(bool, MethodFlushing, true, \
427 "Reclamation of zombie and not-entrant methods") \
428 \
429 develop(bool, VerifyStack, false, \
430 "Verify stack of each thread when it is entering a runtime call") \
431 \
432 develop(bool, ForceUnreachable, false, \
433 "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \
434 \
435 notproduct(bool, StressDerivedPointers, false, \
436 "Force scavenge when a derived pointers is detected on stack " \
437 "after rtm call") \
438 \
439 develop(bool, TraceDerivedPointers, false, \
440 "Trace traversal of derived pointers on stack") \
441 \
442 notproduct(bool, TraceCodeBlobStacks, false, \
443 "Trace stack-walk of codeblobs") \
444 \
445 product(bool, PrintJNIResolving, false, \
446 "Used to implement -v:jni") \
447 \
448 notproduct(bool, PrintRewrites, false, \
449 "Print methods that are being rewritten") \
450 \
451 product(bool, UseInlineCaches, true, \
452 "Use Inline Caches for virtual calls ") \
453 \
454 develop(bool, InlineArrayCopy, true, \
455 "inline arraycopy native that is known to be part of " \
456 "base library DLL") \
457 \
458 develop(bool, InlineObjectHash, true, \
459 "inline Object::hashCode() native that is known to be part " \
460 "of base library DLL") \
461 \
462 develop(bool, InlineObjectCopy, true, \
463 "inline Object.clone and Arrays.copyOf[Range] intrinsics") \
464 \
465 develop(bool, InlineNatives, true, \
466 "inline natives that are known to be part of base library DLL") \
467 \
468 develop(bool, InlineMathNatives, true, \
469 "inline SinD, CosD, etc.") \
470 \
471 develop(bool, InlineClassNatives, true, \
472 "inline Class.isInstance, etc") \
473 \
474 develop(bool, InlineAtomicLong, true, \
475 "inline sun.misc.AtomicLong") \
476 \
477 develop(bool, InlineThreadNatives, true, \
478 "inline Thread.currentThread, etc") \
479 \
480 develop(bool, InlineReflectionGetCallerClass, true, \
481 "inline sun.reflect.Reflection.getCallerClass(), known to be part "\
482 "of base library DLL") \
483 \
484 develop(bool, InlineUnsafeOps, true, \
485 "inline memory ops (native methods) from sun.misc.Unsafe") \
486 \
487 develop(bool, ConvertCmpD2CmpF, true, \
488 "Convert cmpD to cmpF when one input is constant in float range") \
489 \
490 develop(bool, ConvertFloat2IntClipping, true, \
491 "Convert float2int clipping idiom to integer clipping") \
492 \
493 develop(bool, SpecialStringCompareTo, true, \
494 "special version of string compareTo") \
495 \
496 develop(bool, SpecialStringIndexOf, true, \
497 "special version of string indexOf") \
498 \
499 develop(bool, SpecialStringEquals, true, \
500 "special version of string equals") \
501 \
502 develop(bool, SpecialArraysEquals, true, \
503 "special version of Arrays.equals(char[],char[])") \
504 \
505 product(bool, UseSSE42Intrinsics, false, \
506 "SSE4.2 versions of intrinsics") \
507 \
508 develop(bool, TraceCallFixup, false, \
509 "traces all call fixups") \
510 \
511 develop(bool, DeoptimizeALot, false, \
512 "deoptimize at every exit from the runtime system") \
513 \
514 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
515 "a comma separated list of bcis to deoptimize at") \
516 \
517 product(bool, DeoptimizeRandom, false, \
518 "deoptimize random frames on random exit from the runtime system")\
519 \
520 notproduct(bool, ZombieALot, false, \
521 "creates zombies (non-entrant) at exit from the runt. system") \
522 \
523 notproduct(bool, WalkStackALot, false, \
524 "trace stack (no print) at every exit from the runtime system") \
525 \
526 develop(bool, Debugging, false, \
527 "set when executing debug methods in debug.ccp " \
528 "(to prevent triggering assertions)") \
529 \
530 notproduct(bool, StrictSafepointChecks, trueInDebug, \
531 "Enable strict checks that safepoints cannot happen for threads " \
532 "that used No_Safepoint_Verifier") \
533 \
534 notproduct(bool, VerifyLastFrame, false, \
535 "Verify oops on last frame on entry to VM") \
536 \
537 develop(bool, TraceHandleAllocation, false, \
538 "Prints out warnings when suspicious many handles are allocated") \
539 \
540 product(bool, UseCompilerSafepoints, true, \
541 "Stop at safepoints in compiled code") \
542 \
543 product(bool, UseSplitVerifier, true, \
544 "use split verifier with StackMapTable attributes") \
545 \
546 product(bool, FailOverToOldVerifier, true, \
547 "fail over to old verifier when split verifier fails") \
548 \
549 develop(bool, ShowSafepointMsgs, false, \
550 "Show msg. about safepoint synch.") \
551 \
552 product(bool, SafepointTimeout, false, \
553 "Time out and warn or fail after SafepointTimeoutDelay " \
554 "milliseconds if failed to reach safepoint") \
555 \
556 develop(bool, DieOnSafepointTimeout, false, \
557 "Die upon failure to reach safepoint (see SafepointTimeout)") \
558 \
559 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
560 /* typically, at most a few retries are needed */ \
561 product(intx, SuspendRetryCount, 50, \
562 "Maximum retry count for an external suspend request") \
563 \
564 product(intx, SuspendRetryDelay, 5, \
565 "Milliseconds to delay per retry (* current_retry_count)") \
566 \
567 product(bool, AssertOnSuspendWaitFailure, false, \
568 "Assert/Guarantee on external suspend wait failure") \
569 \
570 product(bool, TraceSuspendWaitFailures, false, \
571 "Trace external suspend wait failures") \
572 \
573 product(bool, MaxFDLimit, true, \
574 "Bump the number of file descriptors to max in solaris.") \
575 \
576 notproduct(bool, LogEvents, trueInDebug, \
577 "Enable Event log") \
578 \
579 product(bool, BytecodeVerificationRemote, true, \
580 "Enables the Java bytecode verifier for remote classes") \
581 \
582 product(bool, BytecodeVerificationLocal, false, \
583 "Enables the Java bytecode verifier for local classes") \
584 \
585 develop(bool, ForceFloatExceptions, trueInDebug, \
586 "Force exceptions on FP stack under/overflow") \
587 \
588 develop(bool, SoftMatchFailure, trueInProduct, \
589 "If the DFA fails to match a node, print a message and bail out") \
590 \
591 develop(bool, VerifyStackAtCalls, false, \
592 "Verify that the stack pointer is unchanged after calls") \
593 \
594 develop(bool, TraceJavaAssertions, false, \
595 "Trace java language assertions") \
596 \
597 notproduct(bool, CheckAssertionStatusDirectives, false, \
598 "temporary - see javaClasses.cpp") \
599 \
600 notproduct(bool, PrintMallocFree, false, \
601 "Trace calls to C heap malloc/free allocation") \
602 \
603 notproduct(bool, PrintOopAddress, false, \
604 "Always print the location of the oop") \
605 \
606 notproduct(bool, VerifyCodeCacheOften, false, \
607 "Verify compiled-code cache often") \
608 \
609 develop(bool, ZapDeadCompiledLocals, false, \
610 "Zap dead locals in compiler frames") \
611 \
612 notproduct(bool, ZapDeadLocalsOld, false, \
613 "Zap dead locals (old version, zaps all frames when " \
614 "entering the VM") \
615 \
616 notproduct(bool, CheckOopishValues, false, \
617 "Warn if value contains oop ( requires ZapDeadLocals)") \
618 \
619 develop(bool, UseMallocOnly, false, \
620 "use only malloc/free for allocation (no resource area/arena)") \
621 \
622 develop(bool, PrintMalloc, false, \
623 "print all malloc/free calls") \
624 \
625 develop(bool, ZapResourceArea, trueInDebug, \
626 "Zap freed resource/arena space with 0xABABABAB") \
627 \
628 notproduct(bool, ZapVMHandleArea, trueInDebug, \
629 "Zap freed VM handle space with 0xBCBCBCBC") \
630 \
631 develop(bool, ZapJNIHandleArea, trueInDebug, \
632 "Zap freed JNI handle space with 0xFEFEFEFE") \
633 \
634 develop(bool, ZapUnusedHeapArea, trueInDebug, \
635 "Zap unused heap space with 0xBAADBABE") \
636 \
637 develop(bool, TraceZapUnusedHeapArea, false, \
638 "Trace zapping of unused heap space") \
639 \
640 develop(bool, CheckZapUnusedHeapArea, false, \
641 "Check zapping of unused heap space") \
642 \
643 develop(bool, ZapFillerObjects, trueInDebug, \
644 "Zap filler objects with 0xDEAFBABE") \
645 \
646 develop(bool, PrintVMMessages, true, \
647 "Print vm messages on console") \
648 \
649 product(bool, PrintGCApplicationConcurrentTime, false, \
650 "Print the time the application has been running") \
651 \
652 product(bool, PrintGCApplicationStoppedTime, false, \
653 "Print the time the application has been stopped") \
654 \
655 develop(bool, Verbose, false, \
656 "Prints additional debugging information from other modes") \
657 \
658 develop(bool, PrintMiscellaneous, false, \
659 "Prints uncategorized debugging information (requires +Verbose)") \
660 \
661 develop(bool, WizardMode, false, \
662 "Prints much more debugging information") \
663 \
664 product(bool, ShowMessageBoxOnError, false, \
665 "Keep process alive on VM fatal error") \
666 \
667 product_pd(bool, UseOSErrorReporting, \
668 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
669 \
670 product(bool, SuppressFatalErrorMessage, false, \
671 "Do NO Fatal Error report [Avoid deadlock]") \
672 \
673 product(ccstrlist, OnError, "", \
674 "Run user-defined commands on fatal error; see VMError.cpp " \
675 "for examples") \
676 \
677 product(ccstrlist, OnOutOfMemoryError, "", \
678 "Run user-defined commands on first java.lang.OutOfMemoryError") \
679 \
680 manageable(bool, HeapDumpBeforeFullGC, false, \
681 "Dump heap to file before any major stop-world GC") \
682 \
683 manageable(bool, HeapDumpAfterFullGC, false, \
684 "Dump heap to file after any major stop-world GC") \
685 \
686 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
687 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
688 \
689 manageable(ccstr, HeapDumpPath, NULL, \
690 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \
691 "directory) of the dump file (defaults to java_pid<pid>.hprof" \
692 "in the working directory)") \
693 \
694 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
695 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
696 "when the heap usage is larger than this") \
697 \
698 develop(uintx, HeapDumpSegmentSize, 1*G, \
699 "Approximate segment size when generating a segmented heap dump") \
700 \
701 develop(bool, BreakAtWarning, false, \
702 "Execute breakpoint upon encountering VM warning") \
703 \
704 product_pd(bool, UseVectoredExceptions, \
705 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \
706 \
707 develop(bool, TraceVMOperation, false, \
708 "Trace vm operations") \
709 \
710 develop(bool, UseFakeTimers, false, \
711 "Tells whether the VM should use system time or a fake timer") \
712 \
713 diagnostic(bool, LogCompilation, false, \
714 "Log compilation activity in detail to hotspot.log or LogFile") \
715 \
716 product(bool, PrintCompilation, false, \
717 "Print compilations") \
718 \
719 diagnostic(bool, TraceNMethodInstalls, false, \
720 "Trace nmethod intallation") \
721 \
722 diagnostic(intx, ScavengeRootsInCode, 0, \
723 "0: do not allow scavengable oops in the code cache; " \
724 "1: allow scavenging from the code cache; " \
725 "2: emit as many constants as the compiler can see") \
726 \
727 diagnostic(bool, TraceOSRBreakpoint, false, \
728 "Trace OSR Breakpoint ") \
729 \
730 diagnostic(bool, TraceCompileTriggered, false, \
731 "Trace compile triggered") \
732 \
733 diagnostic(bool, TraceTriggers, false, \
734 "Trace triggers") \
735 \
736 product(bool, AlwaysRestoreFPU, false, \
737 "Restore the FPU control word after every JNI call (expensive)") \
738 \
739 notproduct(bool, PrintCompilation2, false, \
740 "Print additional statistics per compilation") \
741 \
742 diagnostic(bool, PrintAdapterHandlers, false, \
743 "Print code generated for i2c/c2i adapters") \
744 \
745 develop(bool, VerifyAdapterSharing, false, \
746 "Verify that the code for shared adapters is the equivalent") \
747 \
748 diagnostic(bool, PrintAssembly, false, \
749 "Print assembly code (using external disassembler.so)") \
750 \
751 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
752 "Options string passed to disassembler.so") \
753 \
754 diagnostic(bool, PrintNMethods, false, \
755 "Print assembly code for nmethods when generated") \
756 \
757 diagnostic(bool, PrintNativeNMethods, false, \
758 "Print assembly code for native nmethods when generated") \
759 \
760 develop(bool, PrintDebugInfo, false, \
761 "Print debug information for all nmethods when generated") \
762 \
763 develop(bool, PrintRelocations, false, \
764 "Print relocation information for all nmethods when generated") \
765 \
766 develop(bool, PrintDependencies, false, \
767 "Print dependency information for all nmethods when generated") \
768 \
769 develop(bool, PrintExceptionHandlers, false, \
770 "Print exception handler tables for all nmethods when generated") \
771 \
772 develop(bool, InterceptOSException, false, \
773 "Starts debugger when an implicit OS (e.g., NULL) " \
774 "exception happens") \
775 \
776 notproduct(bool, PrintCodeCache, false, \
777 "Print the compiled_code cache when exiting") \
778 \
779 develop(bool, PrintCodeCache2, false, \
780 "Print detailed info on the compiled_code cache when exiting") \
781 \
782 diagnostic(bool, PrintStubCode, false, \
783 "Print generated stub code") \
784 \
785 product(bool, StackTraceInThrowable, true, \
786 "Collect backtrace in throwable when exception happens") \
787 \
788 product(bool, OmitStackTraceInFastThrow, true, \
789 "Omit backtraces for some 'hot' exceptions in optimized code") \
790 \
791 product(bool, ProfilerPrintByteCodeStatistics, false, \
792 "Prints byte code statictics when dumping profiler output") \
793 \
794 product(bool, ProfilerRecordPC, false, \
795 "Collects tick for each 16 byte interval of compiled code") \
796 \
797 product(bool, ProfileVM, false, \
798 "Profiles ticks that fall within VM (either in the VM Thread " \
799 "or VM code called through stubs)") \
800 \
801 product(bool, ProfileIntervals, false, \
802 "Prints profiles for each interval (see ProfileIntervalsTicks)") \
803 \
804 notproduct(bool, ProfilerCheckIntervals, false, \
805 "Collect and print info on spacing of profiler ticks") \
806 \
807 develop(bool, PrintJVMWarnings, false, \
808 "Prints warnings for unimplemented JVM functions") \
809 \
810 notproduct(uintx, WarnOnStalledSpinLock, 0, \
811 "Prints warnings for stalled SpinLocks") \
812 \
813 develop(bool, InitializeJavaLangSystem, true, \
814 "Initialize java.lang.System - turn off for individual " \
815 "method debugging") \
816 \
817 develop(bool, InitializeJavaLangString, true, \
818 "Initialize java.lang.String - turn off for individual " \
819 "method debugging") \
820 \
821 develop(bool, InitializeJavaLangExceptionsErrors, true, \
822 "Initialize various error and exception classes - turn off for " \
823 "individual method debugging") \
824 \
825 product(bool, RegisterFinalizersAtInit, true, \
826 "Register finalizable objects at end of Object.<init> or " \
827 "after allocation") \
828 \
829 develop(bool, RegisterReferences, true, \
830 "Tells whether the VM should register soft/weak/final/phantom " \
831 "references") \
832 \
833 develop(bool, IgnoreRewrites, false, \
834 "Supress rewrites of bytecodes in the oopmap generator. " \
835 "This is unsafe!") \
836 \
837 develop(bool, PrintCodeCacheExtension, false, \
838 "Print extension of code cache") \
839 \
840 develop(bool, UsePrivilegedStack, true, \
841 "Enable the security JVM functions") \
842 \
843 develop(bool, IEEEPrecision, true, \
844 "Enables IEEE precision (for INTEL only)") \
845 \
846 develop(bool, ProtectionDomainVerification, true, \
847 "Verifies protection domain before resolution in system " \
848 "dictionary") \
849 \
850 product(bool, ClassUnloading, true, \
851 "Do unloading of classes") \
852 \
853 diagnostic(bool, LinkWellKnownClasses, false, \
854 "Resolve a well known class as soon as its name is seen") \
855 \
856 develop(bool, DisableStartThread, false, \
857 "Disable starting of additional Java threads " \
858 "(for debugging only)") \
859 \
860 develop(bool, MemProfiling, false, \
861 "Write memory usage profiling to log file") \
862 \
863 notproduct(bool, PrintSystemDictionaryAtExit, false, \
864 "Prints the system dictionary at exit") \
865 \
866 diagnostic(bool, UnsyncloadClass, false, \
867 "Unstable: VM calls loadClass unsynchronized. Custom " \
868 "class loader must call VM synchronized for findClass " \
869 "and defineClass.") \
870 \
871 product(bool, AlwaysLockClassLoader, false, \
872 "Require the VM to acquire the class loader lock before calling " \
873 "loadClass() even for class loaders registering " \
874 "as parallel capable") \
875 \
876 product(bool, AllowParallelDefineClass, false, \
877 "Allow parallel defineClass requests for class loaders " \
878 "registering as parallel capable") \
879 \
880 product(bool, MustCallLoadClassInternal, false, \
881 "Call loadClassInternal() rather than loadClass()") \
882 \
883 product_pd(bool, DontYieldALot, \
884 "Throw away obvious excess yield calls (for SOLARIS only)") \
885 \
886 product_pd(bool, ConvertSleepToYield, \
887 "Converts sleep(0) to thread yield " \
888 "(may be off for SOLARIS to improve GUI)") \
889 \
890 product(bool, ConvertYieldToSleep, false, \
891 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\
892 "behavior (SOLARIS only)") \
893 \
894 product(bool, UseBoundThreads, true, \
895 "Bind user level threads to kernel threads (for SOLARIS only)") \
896 \
897 develop(bool, UseDetachedThreads, true, \
898 "Use detached threads that are recycled upon termination " \
899 "(for SOLARIS only)") \
900 \
901 product(bool, UseLWPSynchronization, true, \
902 "Use LWP-based instead of libthread-based synchronization " \
903 "(SPARC only)") \
904 \
905 product(ccstr, SyncKnobs, NULL, \
906 "(Unstable) Various monitor synchronization tunables") \
907 \
908 product(intx, EmitSync, 0, \
909 "(Unsafe,Unstable) " \
910 " Controls emission of inline sync fast-path code") \
911 \
912 product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \
913 \
914 product(intx, Atomics, 0, \
915 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \
916 \
917 product(intx, FenceInstruction, 0, \
918 "(Unsafe,Unstable) Experimental") \
919 \
920 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \
921 \
922 product(intx, SyncVerbose, 0, "(Unstable)" ) \
923 \
924 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \
925 \
926 product(intx, hashCode, 0, \
927 "(Unstable) select hashCode generation algorithm" ) \
928 \
929 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
930 "(Unstable, Linux-specific)" \
931 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \
932 \
933 product(bool, FilterSpuriousWakeups, true, \
934 "Prevent spurious or premature wakeups from object.wait " \
935 "(Solaris only)") \
936 \
937 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \
938 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \
939 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \
940 \
941 develop(bool, UsePthreads, false, \
942 "Use pthread-based instead of libthread-based synchronization " \
943 "(SPARC only)") \
944 \
945 product(bool, AdjustConcurrency, false, \
946 "call thr_setconcurrency at thread create time to avoid " \
947 "LWP starvation on MP systems (For Solaris Only)") \
948 \
949 develop(bool, UpdateHotSpotCompilerFileOnError, true, \
950 "Should the system attempt to update the compiler file when " \
951 "an error occurs?") \
952 \
953 product(bool, ReduceSignalUsage, false, \
954 "Reduce the use of OS signals in Java and/or the VM") \
955 \
956 notproduct(bool, ValidateMarkSweep, false, \
957 "Do extra validation during MarkSweep collection") \
958 \
959 notproduct(bool, RecordMarkSweepCompaction, false, \
960 "Enable GC-to-GC recording and querying of compaction during " \
961 "MarkSweep") \
962 \
963 develop_pd(bool, ShareVtableStubs, \
964 "Share vtable stubs (smaller code but worse branch prediction") \
965 \
966 develop(bool, LoadLineNumberTables, true, \
967 "Tells whether the class file parser loads line number tables") \
968 \
969 develop(bool, LoadLocalVariableTables, true, \
970 "Tells whether the class file parser loads local variable tables")\
971 \
972 develop(bool, LoadLocalVariableTypeTables, true, \
973 "Tells whether the class file parser loads local variable type tables")\
974 \
975 product(bool, AllowUserSignalHandlers, false, \
976 "Do not complain if the application installs signal handlers " \
977 "(Solaris & Linux only)") \
978 \
979 product(bool, UseSignalChaining, true, \
980 "Use signal-chaining to invoke signal handlers installed " \
981 "by the application (Solaris & Linux only)") \
982 \
983 product(bool, UseAltSigs, false, \
984 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
985 "internal signals (Solaris only)") \
986 \
987 product(bool, UseSpinning, false, \
988 "Use spinning in monitor inflation and before entry") \
989 \
990 product(bool, PreSpinYield, false, \
991 "Yield before inner spinning loop") \
992 \
993 product(bool, PostSpinYield, true, \
994 "Yield after inner spinning loop") \
995 \
996 product(bool, AllowJNIEnvProxy, false, \
997 "Allow JNIEnv proxies for jdbx") \
998 \
999 product(bool, JNIDetachReleasesMonitors, true, \
1000 "JNI DetachCurrentThread releases monitors owned by thread") \
1001 \
1002 product(bool, RestoreMXCSROnJNICalls, false, \
1003 "Restore MXCSR when returning from JNI calls") \
1004 \
1005 product(bool, CheckJNICalls, false, \
1006 "Verify all arguments to JNI calls") \
1007 \
1008 product(bool, UseFastJNIAccessors, true, \
1009 "Use optimized versions of Get<Primitive>Field") \
1010 \
1011 product(bool, EagerXrunInit, false, \
1012 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1013 " but not all -Xrun libraries may support the state of the VM at this time") \
1014 \
1015 product(bool, PreserveAllAnnotations, false, \
1016 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \
1017 \
1018 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1019 "Number of OutOfMemoryErrors preallocated with backtrace") \
1020 \
1021 product(bool, LazyBootClassLoader, true, \
1022 "Enable/disable lazy opening of boot class path entries") \
1023 \
1024 diagnostic(bool, UseIncDec, true, \
1025 "Use INC, DEC instructions on x86") \
1026 \
1027 product(bool, UseNewLongLShift, false, \
1028 "Use optimized bitwise shift left") \
1029 \
1030 product(bool, UseStoreImmI16, true, \
1031 "Use store immediate 16-bits value instruction on x86") \
1032 \
1033 product(bool, UseAddressNop, false, \
1034 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \
1035 \
1036 product(bool, UseXmmLoadAndClearUpper, true, \
1037 "Load low part of XMM register and clear upper part") \
1038 \
1039 product(bool, UseXmmRegToRegMoveAll, false, \
1040 "Copy all XMM register bits when moving value between registers") \
1041 \
1042 product(bool, UseXmmI2D, false, \
1043 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \
1044 \
1045 product(bool, UseXmmI2F, false, \
1046 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \
1047 \
1048 product(bool, UseXMMForArrayCopy, false, \
1049 "Use SSE2 MOVQ instruction for Arraycopy") \
1050 \
1051 product(bool, UseUnalignedLoadStores, false, \
1052 "Use SSE2 MOVDQU instruction for Arraycopy") \
1053 \
1054 product(intx, FieldsAllocationStyle, 1, \
1055 "0 - type based with oops first, 1 - with oops last") \
1056 \
1057 product(bool, CompactFields, true, \
1058 "Allocate nonstatic fields in gaps between previous fields") \
1059 \
1060 notproduct(bool, PrintCompactFieldsSavings, false, \
1061 "Print how many words were saved with CompactFields") \
1062 \
1063 product(bool, UseBiasedLocking, true, \
1064 "Enable biased locking in JVM") \
1065 \
1066 product(intx, BiasedLockingStartupDelay, 4000, \
1067 "Number of milliseconds to wait before enabling biased locking") \
1068 \
1069 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1070 "Print statistics of biased locking in JVM") \
1071 \
1072 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1073 "Threshold of number of revocations per type to try to " \
1074 "rebias all objects in the heap of that type") \
1075 \
1076 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1077 "Threshold of number of revocations per type to permanently " \
1078 "revoke biases of all objects in the heap of that type") \
1079 \
1080 product(intx, BiasedLockingDecayTime, 25000, \
1081 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1082 "type after previous bulk rebias") \
1083 \
1084 /* tracing */ \
1085 \
1086 notproduct(bool, TraceRuntimeCalls, false, \
1087 "Trace run-time calls") \
1088 \
1089 develop(bool, TraceJNICalls, false, \
1090 "Trace JNI calls") \
1091 \
1092 notproduct(bool, TraceJVMCalls, false, \
1093 "Trace JVM calls") \
1094 \
1095 product(ccstr, TraceJVMTI, NULL, \
1096 "Trace flags for JVMTI functions and events") \
1097 \
1098 product(bool, ForceFullGCJVMTIEpilogues, false, \
1099 "Force 'Full GC' was done semantics for JVMTI GC epilogues") \
1100 \
1101 /* This option can change an EMCP method into an obsolete method. */ \
1102 /* This can affect tests that except specific methods to be EMCP. */ \
1103 /* This option should be used with caution. */ \
1104 product(bool, StressLdcRewrite, false, \
1105 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1106 \
1107 product(intx, TraceRedefineClasses, 0, \
1108 "Trace level for JVMTI RedefineClasses") \
1109 \
1110 /* change to false by default sometime after Mustang */ \
1111 product(bool, VerifyMergedCPBytecodes, true, \
1112 "Verify bytecodes after RedefineClasses constant pool merging") \
1113 \
1114 develop(bool, TraceJNIHandleAllocation, false, \
1115 "Trace allocation/deallocation of JNI handle blocks") \
1116 \
1117 develop(bool, TraceThreadEvents, false, \
1118 "Trace all thread events") \
1119 \
1120 develop(bool, TraceBytecodes, false, \
1121 "Trace bytecode execution") \
1122 \
1123 develop(bool, TraceClassInitialization, false, \
1124 "Trace class initialization") \
1125 \
1126 develop(bool, TraceExceptions, false, \
1127 "Trace exceptions") \
1128 \
1129 develop(bool, TraceICs, false, \
1130 "Trace inline cache changes") \
1131 \
1132 notproduct(bool, TraceInvocationCounterOverflow, false, \
1133 "Trace method invocation counter overflow") \
1134 \
1135 develop(bool, TraceInlineCacheClearing, false, \
1136 "Trace clearing of inline caches in nmethods") \
1137 \
1138 develop(bool, TraceDependencies, false, \
1139 "Trace dependencies") \
1140 \
1141 develop(bool, VerifyDependencies, trueInDebug, \
1142 "Exercise and verify the compilation dependency mechanism") \
1143 \
1144 develop(bool, TraceNewOopMapGeneration, false, \
1145 "Trace OopMapGeneration") \
1146 \
1147 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1148 "Trace OopMapGeneration: print detailed cell states") \
1149 \
1150 develop(bool, TimeOopMap, false, \
1151 "Time calls to GenerateOopMap::compute_map() in sum") \
1152 \
1153 develop(bool, TimeOopMap2, false, \
1154 "Time calls to GenerateOopMap::compute_map() individually") \
1155 \
1156 develop(bool, TraceMonitorMismatch, false, \
1157 "Trace monitor matching failures during OopMapGeneration") \
1158 \
1159 develop(bool, TraceOopMapRewrites, false, \
1160 "Trace rewritting of method oops during oop map generation") \
1161 \
1162 develop(bool, TraceSafepoint, false, \
1163 "Trace safepoint operations") \
1164 \
1165 develop(bool, TraceICBuffer, false, \
1166 "Trace usage of IC buffer") \
1167 \
1168 develop(bool, TraceCompiledIC, false, \
1169 "Trace changes of compiled IC") \
1170 \
1171 notproduct(bool, TraceZapDeadLocals, false, \
1172 "Trace zapping dead locals") \
1173 \
1174 develop(bool, TraceStartupTime, false, \
1175 "Trace setup time") \
1176 \
1177 develop(bool, TraceHPI, false, \
1178 "Trace Host Porting Interface (HPI)") \
1179 \
1180 product(ccstr, HPILibPath, NULL, \
1181 "Specify alternate path to HPI library") \
1182 \
1183 develop(bool, TraceProtectionDomainVerification, false, \
1184 "Trace protection domain verifcation") \
1185 \
1186 develop(bool, TraceClearedExceptions, false, \
1187 "Prints when an exception is forcibly cleared") \
1188 \
1189 product(bool, TraceClassResolution, false, \
1190 "Trace all constant pool resolutions (for debugging)") \
1191 \
1192 product(bool, TraceBiasedLocking, false, \
1193 "Trace biased locking in JVM") \
1194 \
1195 product(bool, TraceMonitorInflation, false, \
1196 "Trace monitor inflation in JVM") \
1197 \
1198 /* assembler */ \
1199 product(bool, Use486InstrsOnly, false, \
1200 "Use 80486 Compliant instruction subset") \
1201 \
1202 /* gc */ \
1203 \
1204 product(bool, UseSerialGC, false, \
1205 "Use the serial garbage collector") \
1206 \
1207 product(bool, UseG1GC, false, \
1208 "Use the Garbage-First garbage collector") \
1209 \
1210 product(bool, UseParallelGC, false, \
1211 "Use the Parallel Scavenge garbage collector") \
1212 \
1213 product(bool, UseParallelOldGC, false, \
1214 "Use the Parallel Old garbage collector") \
1215 \
1216 product(bool, UseParallelOldGCCompacting, true, \
1217 "In the Parallel Old garbage collector use parallel compaction") \
1218 \
1219 product(bool, UseParallelDensePrefixUpdate, true, \
1220 "In the Parallel Old garbage collector use parallel dense" \
1221 " prefix update") \
1222 \
1223 product(uintx, HeapMaximumCompactionInterval, 20, \
1224 "How often should we maximally compact the heap (not allowing " \
1225 "any dead space)") \
1226 \
1227 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1228 "The collection count for the first maximum compaction") \
1229 \
1230 product(bool, UseMaximumCompactionOnSystemGC, true, \
1231 "In the Parallel Old garbage collector maximum compaction for " \
1232 "a system GC") \
1233 \
1234 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1235 "The mean used by the par compact dead wood" \
1236 "limiter (a number between 0-100).") \
1237 \
1238 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1239 "The standard deviation used by the par compact dead wood" \
1240 "limiter (a number between 0-100).") \
1241 \
1242 product(bool, UseParallelOldGCDensePrefix, true, \
1243 "Use a dense prefix with the Parallel Old garbage collector") \
1244 \
1245 product(uintx, ParallelGCThreads, 0, \
1246 "Number of parallel threads parallel gc will use") \
1247 \
1248 develop(bool, ParallelOldGCSplitALot, false, \
1249 "Provoke splitting (copying data from a young gen space to" \
1250 "multiple destination spaces)") \
1251 \
1252 develop(uintx, ParallelOldGCSplitInterval, 3, \
1253 "How often to provoke splitting a young gen space") \
1254 \
1255 develop(bool, TraceRegionTasksQueuing, false, \
1256 "Trace the queuing of the region tasks") \
1257 \
1258 product(uintx, ConcGCThreads, 0, \
1259 "Number of threads concurrent gc will use") \
1260 \
1261 product(uintx, YoungPLABSize, 4096, \
1262 "Size of young gen promotion labs (in HeapWords)") \
1263 \
1264 product(uintx, OldPLABSize, 1024, \
1265 "Size of old gen promotion labs (in HeapWords)") \
1266 \
1267 product(uintx, GCTaskTimeStampEntries, 200, \
1268 "Number of time stamp entries per gc worker thread") \
1269 \
1270 product(bool, AlwaysTenure, false, \
1271 "Always tenure objects in eden. (ParallelGC only)") \
1272 \
1273 product(bool, NeverTenure, false, \
1274 "Never tenure objects in eden, May tenure on overflow " \
1275 "(ParallelGC only)") \
1276 \
1277 product(bool, ScavengeBeforeFullGC, true, \
1278 "Scavenge youngest generation before each full GC, " \
1279 "used with UseParallelGC") \
1280 \
1281 develop(bool, ScavengeWithObjectsInToSpace, false, \
1282 "Allow scavenges to occur when to_space contains objects.") \
1283 \
1284 product(bool, UseConcMarkSweepGC, false, \
1285 "Use Concurrent Mark-Sweep GC in the old generation") \
1286 \
1287 product(bool, ExplicitGCInvokesConcurrent, false, \
1288 "A System.gc() request invokes a concurrent collection;" \
1289 " (effective only when UseConcMarkSweepGC)") \
1290 \
1291 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1292 "A System.gc() request invokes a concurrent collection and " \
1293 "also unloads classes during such a concurrent gc cycle " \
1294 "(effective only when UseConcMarkSweepGC)") \
1295 \
1296 develop(bool, UseCMSAdaptiveFreeLists, true, \
1297 "Use Adaptive Free Lists in the CMS generation") \
1298 \
1299 develop(bool, UseAsyncConcMarkSweepGC, true, \
1300 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1301 \
1302 develop(bool, RotateCMSCollectionTypes, false, \
1303 "Rotate the CMS collections among concurrent and STW") \
1304 \
1305 product(bool, UseCMSBestFit, true, \
1306 "Use CMS best fit allocation strategy") \
1307 \
1308 product(bool, UseCMSCollectionPassing, true, \
1309 "Use passing of collection from background to foreground") \
1310 \
1311 product(bool, UseParNewGC, false, \
1312 "Use parallel threads in the new generation.") \
1313 \
1314 product(bool, ParallelGCVerbose, false, \
1315 "Verbose output for parallel GC.") \
1316 \
1317 product(intx, ParallelGCBufferWastePct, 10, \
1318 "wasted fraction of parallel allocation buffer.") \
1319 \
1320 product(bool, ParallelGCRetainPLAB, true, \
1321 "Retain parallel allocation buffers across scavenges.") \
1322 \
1323 product(intx, TargetPLABWastePct, 10, \
1324 "target wasted space in last buffer as pct of overall allocation")\
1325 \
1326 product(uintx, PLABWeight, 75, \
1327 "Percentage (0-100) used to weight the current sample when" \
1328 "computing exponentially decaying average for ResizePLAB.") \
1329 \
1330 product(bool, ResizePLAB, true, \
1331 "Dynamically resize (survivor space) promotion labs") \
1332 \
1333 product(bool, PrintPLAB, false, \
1334 "Print (survivor space) promotion labs sizing decisions") \
1335 \
1336 product(intx, ParGCArrayScanChunk, 50, \
1337 "Scan a subset and push remainder, if array is bigger than this") \
1338 \
1339 product(bool, ParGCUseLocalOverflow, false, \
1340 "Instead of a global overflow list, use local overflow stacks") \
1341 \
1342 product(bool, ParGCTrimOverflow, true, \
1343 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \
1344 \
1345 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1346 "Whether we should simulate work queue overflow in ParNew") \
1347 \
1348 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1349 "An `interval' counter that determines how frequently " \
1350 "we simulate overflow; a smaller number increases frequency") \
1351 \
1352 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1353 "The desired number of objects to claim from the overflow list") \
1354 \
1355 product(uintx, CMSParPromoteBlocksToClaim, 16, \
1356 "Number of blocks to attempt to claim when refilling CMS LAB for "\
1357 "parallel GC.") \
1358 \
1359 product(uintx, OldPLABWeight, 50, \
1360 "Percentage (0-100) used to weight the current sample when" \
1361 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \
1362 \
1363 product(bool, ResizeOldPLAB, true, \
1364 "Dynamically resize (old gen) promotion labs") \
1365 \
1366 product(bool, PrintOldPLAB, false, \
1367 "Print (old gen) promotion labs sizing decisions") \
1368 \
1369 product(uintx, CMSOldPLABMin, 16, \
1370 "Min size of CMS gen promotion lab caches per worker per blksize")\
1371 \
1372 product(uintx, CMSOldPLABMax, 1024, \
1373 "Max size of CMS gen promotion lab caches per worker per blksize")\
1374 \
1375 product(uintx, CMSOldPLABNumRefills, 4, \
1376 "Nominal number of refills of CMS gen promotion lab cache" \
1377 " per worker per block size") \
1378 \
1379 product(bool, CMSOldPLABResizeQuicker, false, \
1380 "Whether to react on-the-fly during a scavenge to a sudden" \
1381 " change in block demand rate") \
1382 \
1383 product(uintx, CMSOldPLABToleranceFactor, 4, \
1384 "The tolerance of the phase-change detector for on-the-fly" \
1385 " PLAB resizing during a scavenge") \
1386 \
1387 product(uintx, CMSOldPLABReactivityFactor, 2, \
1388 "The gain in the feedback loop for on-the-fly PLAB resizing" \
1389 " during a scavenge") \
1390 \
1391 product(uintx, CMSOldPLABReactivityCeiling, 10, \
1392 "The clamping of the gain in the feedback loop for on-the-fly" \
1393 " PLAB resizing during a scavenge") \
1394 \
1395 product(bool, AlwaysPreTouch, false, \
1396 "It forces all freshly committed pages to be pre-touched.") \
1397 \
1398 product(bool, CMSUseOldDefaults, false, \
1399 "A flag temporarily introduced to allow reverting to some " \
1400 "older default settings; older as of 6.0") \
1401 \
1402 product(intx, CMSYoungGenPerWorker, 16*M, \
1403 "The amount of young gen chosen by default per GC worker " \
1404 "thread available") \
1405 \
1406 product(bool, GCOverheadReporting, false, \
1407 "Enables the GC overhead reporting facility") \
1408 \
1409 product(intx, GCOverheadReportingPeriodMS, 100, \
1410 "Reporting period for conc GC overhead reporting, in ms ") \
1411 \
1412 product(bool, CMSIncrementalMode, false, \
1413 "Whether CMS GC should operate in \"incremental\" mode") \
1414 \
1415 product(uintx, CMSIncrementalDutyCycle, 10, \
1416 "CMS incremental mode duty cycle (a percentage, 0-100). If" \
1417 "CMSIncrementalPacing is enabled, then this is just the initial" \
1418 "value") \
1419 \
1420 product(bool, CMSIncrementalPacing, true, \
1421 "Whether the CMS incremental mode duty cycle should be " \
1422 "automatically adjusted") \
1423 \
1424 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1425 "Lower bound on the duty cycle when CMSIncrementalPacing is " \
1426 "enabled (a percentage, 0-100)") \
1427 \
1428 product(uintx, CMSIncrementalSafetyFactor, 10, \
1429 "Percentage (0-100) used to add conservatism when computing the " \
1430 "duty cycle") \
1431 \
1432 product(uintx, CMSIncrementalOffset, 0, \
1433 "Percentage (0-100) by which the CMS incremental mode duty cycle" \
1434 " is shifted to the right within the period between young GCs") \
1435 \
1436 product(uintx, CMSExpAvgFactor, 50, \
1437 "Percentage (0-100) used to weight the current sample when" \
1438 "computing exponential averages for CMS statistics.") \
1439 \
1440 product(uintx, CMS_FLSWeight, 75, \
1441 "Percentage (0-100) used to weight the current sample when" \
1442 "computing exponentially decating averages for CMS FLS statistics.") \
1443 \
1444 product(uintx, CMS_FLSPadding, 1, \
1445 "The multiple of deviation from mean to use for buffering" \
1446 "against volatility in free list demand.") \
1447 \
1448 product(uintx, FLSCoalescePolicy, 2, \
1449 "CMS: Aggression level for coalescing, increasing from 0 to 4") \
1450 \
1451 product(bool, FLSAlwaysCoalesceLarge, false, \
1452 "CMS: Larger free blocks are always available for coalescing") \
1453 \
1454 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1455 "CMS: the smaller the percentage the greater the coalition force")\
1456 \
1457 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1458 "CMS: the factor by which to inflate estimated demand of small" \
1459 " block sizes to prevent coalescing with an adjoining block") \
1460 \
1461 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1462 "CMS: the factor by which to inflate estimated demand of large" \
1463 " block sizes to prevent coalescing with an adjoining block") \
1464 \
1465 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1466 "CMS: the factor by which to inflate estimated demand of small" \
1467 " block sizes to prevent splitting to supply demand for smaller" \
1468 " blocks") \
1469 \
1470 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1471 "CMS: the factor by which to inflate estimated demand of large" \
1472 " block sizes to prevent splitting to supply demand for smaller" \
1473 " blocks") \
1474 \
1475 product(bool, CMSExtrapolateSweep, false, \
1476 "CMS: cushion for block demand during sweep") \
1477 \
1478 product(uintx, CMS_SweepWeight, 75, \
1479 "Percentage (0-100) used to weight the current sample when " \
1480 "computing exponentially decaying average for inter-sweep " \
1481 "duration") \
1482 \
1483 product(uintx, CMS_SweepPadding, 1, \
1484 "The multiple of deviation from mean to use for buffering " \
1485 "against volatility in inter-sweep duration.") \
1486 \
1487 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1488 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1489 "duration exceeds this threhold in milliseconds") \
1490 \
1491 develop(bool, CMSTraceIncrementalMode, false, \
1492 "Trace CMS incremental mode") \
1493 \
1494 develop(bool, CMSTraceIncrementalPacing, false, \
1495 "Trace CMS incremental mode pacing computation") \
1496 \
1497 develop(bool, CMSTraceThreadState, false, \
1498 "Trace the CMS thread state (enable the trace_state() method)") \
1499 \
1500 product(bool, CMSClassUnloadingEnabled, false, \
1501 "Whether class unloading enabled when using CMS GC") \
1502 \
1503 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1504 "When CMS class unloading is enabled, the maximum CMS cycle count"\
1505 " for which classes may not be unloaded") \
1506 \
1507 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1508 "Compact when asked to collect CMS gen with clear_all_soft_refs") \
1509 \
1510 product(bool, UseCMSCompactAtFullCollection, true, \
1511 "Use mark sweep compact at full collections") \
1512 \
1513 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1514 "Number of CMS full collection done before compaction if > 0") \
1515 \
1516 develop(intx, CMSDictionaryChoice, 0, \
1517 "Use BinaryTreeDictionary as default in the CMS generation") \
1518 \
1519 product(uintx, CMSIndexedFreeListReplenish, 4, \
1520 "Replenish and indexed free list with this number of chunks") \
1521 \
1522 product(bool, CMSReplenishIntermediate, true, \
1523 "Replenish all intermediate free-list caches") \
1524 \
1525 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1526 "When satisfying batched demand, splot blocks from the " \
1527 "IndexedFreeList whose size is a multiple of requested size") \
1528 \
1529 product(bool, CMSLoopWarn, false, \
1530 "Warn in case of excessive CMS looping") \
1531 \
1532 develop(bool, CMSOverflowEarlyRestoration, false, \
1533 "Whether preserved marks should be restored early") \
1534 \
1535 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1536 "Size of marking stack") \
1537 \
1538 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1539 "Max size of marking stack") \
1540 \
1541 notproduct(bool, CMSMarkStackOverflowALot, false, \
1542 "Whether we should simulate frequent marking stack / work queue" \
1543 " overflow") \
1544 \
1545 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1546 "An `interval' counter that determines how frequently" \
1547 " we simulate overflow; a smaller number increases frequency") \
1548 \
1549 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1550 "(Temporary, subject to experimentation)" \
1551 "Maximum number of abortable preclean iterations, if > 0") \
1552 \
1553 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1554 "(Temporary, subject to experimentation)" \
1555 "Maximum time in abortable preclean in ms") \
1556 \
1557 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1558 "(Temporary, subject to experimentation)" \
1559 "Nominal minimum work per abortable preclean iteration") \
1560 \
1561 product(intx, CMSAbortablePrecleanWaitMillis, 100, \
1562 "(Temporary, subject to experimentation)" \
1563 " Time that we sleep between iterations when not given" \
1564 " enough work per iteration") \
1565 \
1566 product(uintx, CMSRescanMultiple, 32, \
1567 "Size (in cards) of CMS parallel rescan task") \
1568 \
1569 product(uintx, CMSConcMarkMultiple, 32, \
1570 "Size (in cards) of CMS concurrent MT marking task") \
1571 \
1572 product(uintx, CMSRevisitStackSize, 1*M, \
1573 "Size of CMS KlassKlass revisit stack") \
1574 \
1575 product(bool, CMSAbortSemantics, false, \
1576 "Whether abort-on-overflow semantics is implemented") \
1577 \
1578 product(bool, CMSParallelRemarkEnabled, true, \
1579 "Whether parallel remark enabled (only if ParNewGC)") \
1580 \
1581 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1582 "Whether parallel remark of survivor space" \
1583 " enabled (effective only if CMSParallelRemarkEnabled)") \
1584 \
1585 product(bool, CMSPLABRecordAlways, true, \
1586 "Whether to always record survivor space PLAB bdries" \
1587 " (effective only if CMSParallelSurvivorRemarkEnabled)") \
1588 \
1589 product(bool, CMSConcurrentMTEnabled, true, \
1590 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \
1591 \
1592 product(bool, CMSPermGenPrecleaningEnabled, true, \
1593 "Whether concurrent precleaning enabled in perm gen" \
1594 " (effective only when CMSPrecleaningEnabled is true)") \
1595 \
1596 product(bool, CMSPrecleaningEnabled, true, \
1597 "Whether concurrent precleaning enabled") \
1598 \
1599 product(uintx, CMSPrecleanIter, 3, \
1600 "Maximum number of precleaning iteration passes") \
1601 \
1602 product(uintx, CMSPrecleanNumerator, 2, \
1603 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1604 " ratio") \
1605 \
1606 product(uintx, CMSPrecleanDenominator, 3, \
1607 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1608 " ratio") \
1609 \
1610 product(bool, CMSPrecleanRefLists1, true, \
1611 "Preclean ref lists during (initial) preclean phase") \
1612 \
1613 product(bool, CMSPrecleanRefLists2, false, \
1614 "Preclean ref lists during abortable preclean phase") \
1615 \
1616 product(bool, CMSPrecleanSurvivors1, false, \
1617 "Preclean survivors during (initial) preclean phase") \
1618 \
1619 product(bool, CMSPrecleanSurvivors2, true, \
1620 "Preclean survivors during abortable preclean phase") \
1621 \
1622 product(uintx, CMSPrecleanThreshold, 1000, \
1623 "Don't re-iterate if #dirty cards less than this") \
1624 \
1625 product(bool, CMSCleanOnEnter, true, \
1626 "Clean-on-enter optimization for reducing number of dirty cards") \
1627 \
1628 product(uintx, CMSRemarkVerifyVariant, 1, \
1629 "Choose variant (1,2) of verification following remark") \
1630 \
1631 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1632 "If Eden used is below this value, don't try to schedule remark") \
1633 \
1634 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1635 "The Eden occupancy % at which to try and schedule remark pause") \
1636 \
1637 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1638 "Start sampling Eden top at least before yg occupancy reaches" \
1639 " 1/<ratio> of the size at which we plan to schedule remark") \
1640 \
1641 product(uintx, CMSSamplingGrain, 16*K, \
1642 "The minimum distance between eden samples for CMS (see above)") \
1643 \
1644 product(bool, CMSScavengeBeforeRemark, false, \
1645 "Attempt scavenge before the CMS remark step") \
1646 \
1647 develop(bool, CMSTraceSweeper, false, \
1648 "Trace some actions of the CMS sweeper") \
1649 \
1650 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1651 "Don't drain below this size per parallel worker/thief") \
1652 \
1653 product(intx, CMSWaitDuration, 2000, \
1654 "Time in milliseconds that CMS thread waits for young GC") \
1655 \
1656 product(bool, CMSYield, true, \
1657 "Yield between steps of concurrent mark & sweep") \
1658 \
1659 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1660 "Bitmap operations should process at most this many bits" \
1661 "between yields") \
1662 \
1663 product(bool, CMSDumpAtPromotionFailure, false, \
1664 "Dump useful information about the state of the CMS old " \
1665 " generation upon a promotion failure.") \
1666 \
1667 product(bool, CMSPrintChunksInDump, false, \
1668 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1669 " more detailed information about the free chunks.") \
1670 \
1671 product(bool, CMSPrintObjectsInDump, false, \
1672 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1673 " more detailed information about the allocated objects.") \
1674 \
1675 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1676 "Verify that all refs across the FLS boundary " \
1677 " are to valid objects") \
1678 \
1679 diagnostic(bool, FLSVerifyLists, false, \
1680 "Do lots of (expensive) FreeListSpace verification") \
1681 \
1682 diagnostic(bool, FLSVerifyIndexTable, false, \
1683 "Do lots of (expensive) FLS index table verification") \
1684 \
1685 develop(bool, FLSVerifyDictionary, false, \
1686 "Do lots of (expensive) FLS dictionary verification") \
1687 \
1688 develop(bool, VerifyBlockOffsetArray, false, \
1689 "Do (expensive!) block offset array verification") \
1690 \
1691 product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug, \
1692 "Maintain _unallocated_block in BlockOffsetArray" \
1693 " (currently applicable only to CMS collector)") \
1694 \
1695 develop(bool, TraceCMSState, false, \
1696 "Trace the state of the CMS collection") \
1697 \
1698 product(intx, RefDiscoveryPolicy, 0, \
1699 "Whether reference-based(0) or referent-based(1)") \
1700 \
1701 product(bool, ParallelRefProcEnabled, false, \
1702 "Enable parallel reference processing whenever possible") \
1703 \
1704 product(bool, ParallelRefProcBalancingEnabled, true, \
1705 "Enable balancing of reference processing queues") \
1706 \
1707 product(intx, CMSTriggerRatio, 80, \
1708 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1709 "allocated before a CMS collection cycle commences") \
1710 \
1711 product(intx, CMSTriggerPermRatio, 80, \
1712 "Percentage of MinHeapFreeRatio in the CMS perm generation that " \
1713 "is allocated before a CMS collection cycle commences, that " \
1714 "also collects the perm generation") \
1715 \
1716 product(uintx, CMSBootstrapOccupancy, 50, \
1717 "Percentage CMS generation occupancy at which to " \
1718 "initiate CMS collection for bootstrapping collection stats") \
1719 \
1720 product(intx, CMSInitiatingOccupancyFraction, -1, \
1721 "Percentage CMS generation occupancy to start a CMS collection " \
1722 "cycle. A negative value means that CMSTriggerRatio is used") \
1723 \
1724 product(uintx, InitiatingHeapOccupancyPercent, 45, \
1725 "Percentage of the (entire) heap occupancy to start a " \
1726 "concurrent GC cycle. It us used by GCs that trigger a " \
1727 "concurrent GC cycle based on the occupancy of the entire heap, " \
1728 "not just one of the generations (e.g., G1). A value of 0 " \
1729 "denotes 'do constant GC cycles'.") \
1730 \
1731 product(intx, CMSInitiatingPermOccupancyFraction, -1, \
1732 "Percentage CMS perm generation occupancy to start a " \
1733 "CMScollection cycle. A negative value means that " \
1734 "CMSTriggerPermRatio is used") \
1735 \
1736 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1737 "Only use occupancy as a crierion for starting a CMS collection") \
1738 \
1739 product(intx, CMSIsTooFullPercentage, 98, \
1740 "An absolute ceiling above which CMS will always consider the " \
1741 "perm gen ripe for collection") \
1742 \
1743 develop(bool, CMSTestInFreeList, false, \
1744 "Check if the coalesced range is already in the " \
1745 "free lists as claimed") \
1746 \
1747 notproduct(bool, CMSVerifyReturnedBytes, false, \
1748 "Check that all the garbage collected was returned to the " \
1749 "free lists.") \
1750 \
1751 notproduct(bool, ScavengeALot, false, \
1752 "Force scavenge at every Nth exit from the runtime system " \
1753 "(N=ScavengeALotInterval)") \
1754 \
1755 develop(bool, FullGCALot, false, \
1756 "Force full gc at every Nth exit from the runtime system " \
1757 "(N=FullGCALotInterval)") \
1758 \
1759 notproduct(bool, GCALotAtAllSafepoints, false, \
1760 "Enforce ScavengeALot/GCALot at all potential safepoints") \
1761 \
1762 product(bool, HandlePromotionFailure, true, \
1763 "The youngest generation collection does not require " \
1764 "a guarantee of full promotion of all live objects.") \
1765 \
1766 product(bool, PrintPromotionFailure, false, \
1767 "Print additional diagnostic information following " \
1768 " promotion failure") \
1769 \
1770 notproduct(bool, PromotionFailureALot, false, \
1771 "Use promotion failure handling on every youngest generation " \
1772 "collection") \
1773 \
1774 develop(uintx, PromotionFailureALotCount, 1000, \
1775 "Number of promotion failures occurring at ParGCAllocBuffer" \
1776 "refill attempts (ParNew) or promotion attempts " \
1777 "(other young collectors) ") \
1778 \
1779 develop(uintx, PromotionFailureALotInterval, 5, \
1780 "Total collections between promotion failures alot") \
1781 \
1782 develop(intx, WorkStealingSleepMillis, 1, \
1783 "Sleep time when sleep is used for yields") \
1784 \
1785 develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \
1786 "Number of yields before a sleep is done during workstealing") \
1787 \
1788 develop(uintx, WorkStealingHardSpins, 4096, \
1789 "Number of iterations in a spin loop between checks on " \
1790 "time out of hard spin") \
1791 \
1792 develop(uintx, WorkStealingSpinToYieldRatio, 10, \
1793 "Ratio of hard spins to calls to yield") \
1794 \
1795 product(uintx, PreserveMarkStackSize, 1024, \
1796 "Size for stack used in promotion failure handling") \
1797 \
1798 develop(uintx, ObjArrayMarkingStride, 512, \
1799 "Number of ObjArray elements to push onto the marking stack" \
1800 "before pushing a continuation entry") \
1801 \
1802 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
1803 \
1804 product_pd(bool, ResizeTLAB, \
1805 "Dynamically resize tlab size for threads") \
1806 \
1807 product(bool, ZeroTLAB, false, \
1808 "Zero out the newly created TLAB") \
1809 \
1810 product(bool, FastTLABRefill, true, \
1811 "Use fast TLAB refill code") \
1812 \
1813 product(bool, PrintTLAB, false, \
1814 "Print various TLAB related information") \
1815 \
1816 product(bool, TLABStats, true, \
1817 "Print various TLAB related information") \
1818 \
1819 product(bool, PrintRevisitStats, false, \
1820 "Print revisit (klass and MDO) stack related information") \
1821 \
1822 product_pd(bool, NeverActAsServerClassMachine, \
1823 "Never act like a server-class machine") \
1824 \
1825 product(bool, AlwaysActAsServerClassMachine, false, \
1826 "Always act like a server-class machine") \
1827 \
1828 product_pd(uint64_t, MaxRAM, \
1829 "Real memory size (in bytes) used to set maximum heap size") \
1830 \
1831 product(uintx, ErgoHeapSizeLimit, 0, \
1832 "Maximum ergonomically set heap size (in bytes); zero means use " \
1833 "MaxRAM / MaxRAMFraction") \
1834 \
1835 product(uintx, MaxRAMFraction, 4, \
1836 "Maximum fraction (1/n) of real memory used for maximum heap " \
1837 "size") \
1838 \
1839 product(uintx, DefaultMaxRAMFraction, 4, \
1840 "Maximum fraction (1/n) of real memory used for maximum heap " \
1841 "size; deprecated: to be renamed to MaxRAMFraction") \
1842 \
1843 product(uintx, MinRAMFraction, 2, \
1844 "Minimum fraction (1/n) of real memory used for maxmimum heap " \
1845 "size on systems with small physical memory size") \
1846 \
1847 product(uintx, InitialRAMFraction, 64, \
1848 "Fraction (1/n) of real memory used for initial heap size") \
1849 \
1850 product(bool, UseAutoGCSelectPolicy, false, \
1851 "Use automatic collection selection policy") \
1852 \
1853 product(uintx, AutoGCSelectPauseMillis, 5000, \
1854 "Automatic GC selection pause threshhold in ms") \
1855 \
1856 product(bool, UseAdaptiveSizePolicy, true, \
1857 "Use adaptive generation sizing policies") \
1858 \
1859 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
1860 "Use adaptive survivor sizing policies") \
1861 \
1862 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
1863 "Use adaptive young-old sizing policies at minor collections") \
1864 \
1865 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
1866 "Use adaptive young-old sizing policies at major collections") \
1867 \
1868 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
1869 "Use statistics from System.GC for adaptive size policy") \
1870 \
1871 product(bool, UseAdaptiveGCBoundary, false, \
1872 "Allow young-old boundary to move") \
1873 \
1874 develop(bool, TraceAdaptiveGCBoundary, false, \
1875 "Trace young-old boundary moves") \
1876 \
1877 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
1878 "Resize the virtual spaces of the young or old generations") \
1879 \
1880 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
1881 "Policy for changeing generation size for throughput goals") \
1882 \
1883 product(uintx, AdaptiveSizePausePolicy, 0, \
1884 "Policy for changing generation size for pause goals") \
1885 \
1886 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
1887 "Adjust tenured generation to achive a minor pause goal") \
1888 \
1889 develop(bool, PSAdjustYoungGenForMajorPause, false, \
1890 "Adjust young generation to achive a major pause goal") \
1891 \
1892 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
1893 "Number of steps where heuristics is used before data is used") \
1894 \
1895 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
1896 "Number of collections before the adaptive sizing is started") \
1897 \
1898 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
1899 "Collecton interval for printing information; zero => never") \
1900 \
1901 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
1902 "Use adaptive minimum footprint as a goal") \
1903 \
1904 product(uintx, AdaptiveSizePolicyWeight, 10, \
1905 "Weight given to exponential resizing, between 0 and 100") \
1906 \
1907 product(uintx, AdaptiveTimeWeight, 25, \
1908 "Weight given to time in adaptive policy, between 0 and 100") \
1909 \
1910 product(uintx, PausePadding, 1, \
1911 "How much buffer to keep for pause time") \
1912 \
1913 product(uintx, PromotedPadding, 3, \
1914 "How much buffer to keep for promotion failure") \
1915 \
1916 product(uintx, SurvivorPadding, 3, \
1917 "How much buffer to keep for survivor overflow") \
1918 \
1919 product(uintx, AdaptivePermSizeWeight, 20, \
1920 "Weight for perm gen exponential resizing, between 0 and 100") \
1921 \
1922 product(uintx, PermGenPadding, 3, \
1923 "How much buffer to keep for perm gen sizing") \
1924 \
1925 product(uintx, ThresholdTolerance, 10, \
1926 "Allowed collection cost difference between generations") \
1927 \
1928 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
1929 "If collection costs are within margin, reduce both by full " \
1930 "delta") \
1931 \
1932 product(uintx, YoungGenerationSizeIncrement, 20, \
1933 "Adaptive size percentage change in young generation") \
1934 \
1935 product(uintx, YoungGenerationSizeSupplement, 80, \
1936 "Supplement to YoungedGenerationSizeIncrement used at startup") \
1937 \
1938 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
1939 "Decay factor to YoungedGenerationSizeSupplement") \
1940 \
1941 product(uintx, TenuredGenerationSizeIncrement, 20, \
1942 "Adaptive size percentage change in tenured generation") \
1943 \
1944 product(uintx, TenuredGenerationSizeSupplement, 80, \
1945 "Supplement to TenuredGenerationSizeIncrement used at startup") \
1946 \
1947 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
1948 "Decay factor to TenuredGenerationSizeIncrement") \
1949 \
1950 product(uintx, MaxGCPauseMillis, max_uintx, \
1951 "Adaptive size policy maximum GC pause time goal in msec, " \
1952 "or (G1 Only) the max. GC time per MMU time slice") \
1953 \
1954 product(intx, GCPauseIntervalMillis, 500, \
1955 "Time slice for MMU specification") \
1956 \
1957 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
1958 "Adaptive size policy maximum GC minor pause time goal in msec") \
1959 \
1960 product(uintx, GCTimeRatio, 99, \
1961 "Adaptive size policy application time to GC time ratio") \
1962 \
1963 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
1964 "Adaptive size scale down factor for shrinking") \
1965 \
1966 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
1967 "Adaptive size decays the major cost for long major intervals") \
1968 \
1969 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
1970 "Time scale over which major costs decay") \
1971 \
1972 product(uintx, MinSurvivorRatio, 3, \
1973 "Minimum ratio of young generation/survivor space size") \
1974 \
1975 product(uintx, InitialSurvivorRatio, 8, \
1976 "Initial ratio of eden/survivor space size") \
1977 \
1978 product(uintx, BaseFootPrintEstimate, 256*M, \
1979 "Estimate of footprint other than Java Heap") \
1980 \
1981 product(bool, UseGCOverheadLimit, true, \
1982 "Use policy to limit of proportion of time spent in GC " \
1983 "before an OutOfMemory error is thrown") \
1984 \
1985 product(uintx, GCTimeLimit, 98, \
1986 "Limit of proportion of time spent in GC before an OutOfMemory" \
1987 "error is thrown (used with GCHeapFreeLimit)") \
1988 \
1989 product(uintx, GCHeapFreeLimit, 2, \
1990 "Minimum percentage of free space after a full GC before an " \
1991 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
1992 \
1993 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
1994 "Number of consecutive collections before gc time limit fires") \
1995 \
1996 product(bool, PrintAdaptiveSizePolicy, false, \
1997 "Print information about AdaptiveSizePolicy") \
1998 \
1999 product(intx, PrefetchCopyIntervalInBytes, -1, \
2000 "How far ahead to prefetch destination area (<= 0 means off)") \
2001 \
2002 product(intx, PrefetchScanIntervalInBytes, -1, \
2003 "How far ahead to prefetch scan area (<= 0 means off)") \
2004 \
2005 product(intx, PrefetchFieldsAhead, -1, \
2006 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2007 \
2008 develop(bool, UsePrefetchQueue, true, \
2009 "Use the prefetch queue during PS promotion") \
2010 \
2011 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2012 "Verify system before exiting") \
2013 \
2014 diagnostic(bool, VerifyBeforeGC, false, \
2015 "Verify memory system before GC") \
2016 \
2017 diagnostic(bool, VerifyAfterGC, false, \
2018 "Verify memory system after GC") \
2019 \
2020 diagnostic(bool, VerifyDuringGC, false, \
2021 "Verify memory system during GC (between phases)") \
2022 \
2023 diagnostic(bool, GCParallelVerificationEnabled, true, \
2024 "Enable parallel memory system verification") \
2025 \
2026 diagnostic(bool, DeferInitialCardMark, false, \
2027 "When +ReduceInitialCardMarks, explicitly defer any that " \
2028 "may arise from new_pre_store_barrier") \
2029 \
2030 diagnostic(bool, VerifyRememberedSets, false, \
2031 "Verify GC remembered sets") \
2032 \
2033 diagnostic(bool, VerifyObjectStartArray, true, \
2034 "Verify GC object start array if verify before/after") \
2035 \
2036 product(bool, DisableExplicitGC, false, \
2037 "Tells whether calling System.gc() does a full GC") \
2038 \
2039 notproduct(bool, CheckMemoryInitialization, false, \
2040 "Checks memory initialization") \
2041 \
2042 product(bool, CollectGen0First, false, \
2043 "Collect youngest generation before each full GC") \
2044 \
2045 diagnostic(bool, BindCMSThreadToCPU, false, \
2046 "Bind CMS Thread to CPU if possible") \
2047 \
2048 diagnostic(uintx, CPUForCMSThread, 0, \
2049 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2050 \
2051 product(bool, BindGCTaskThreadsToCPUs, false, \
2052 "Bind GCTaskThreads to CPUs if possible") \
2053 \
2054 product(bool, UseGCTaskAffinity, false, \
2055 "Use worker affinity when asking for GCTasks") \
2056 \
2057 product(uintx, ProcessDistributionStride, 4, \
2058 "Stride through processors when distributing processes") \
2059 \
2060 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2061 "number of times the coordinator GC thread will sleep while " \
2062 "yielding before giving up and resuming GC") \
2063 \
2064 product(uintx, CMSYieldSleepCount, 0, \
2065 "number of times a GC thread (minus the coordinator) " \
2066 "will sleep while yielding before giving up and resuming GC") \
2067 \
2068 /* gc tracing */ \
2069 manageable(bool, PrintGC, false, \
2070 "Print message at garbage collect") \
2071 \
2072 manageable(bool, PrintGCDetails, false, \
2073 "Print more details at garbage collect") \
2074 \
2075 manageable(bool, PrintGCDateStamps, false, \
2076 "Print date stamps at garbage collect") \
2077 \
2078 manageable(bool, PrintGCTimeStamps, false, \
2079 "Print timestamps at garbage collect") \
2080 \
2081 product(bool, PrintGCTaskTimeStamps, false, \
2082 "Print timestamps for individual gc worker thread tasks") \
2083 \
2084 develop(intx, ConcGCYieldTimeout, 0, \
2085 "If non-zero, assert that GC threads yield within this # of ms.") \
2086 \
2087 notproduct(bool, TraceMarkSweep, false, \
2088 "Trace mark sweep") \
2089 \
2090 product(bool, PrintReferenceGC, false, \
2091 "Print times spent handling reference objects during GC " \
2092 " (enabled only when PrintGCDetails)") \
2093 \
2094 develop(bool, TraceReferenceGC, false, \
2095 "Trace handling of soft/weak/final/phantom references") \
2096 \
2097 develop(bool, TraceFinalizerRegistration, false, \
2098 "Trace registration of final references") \
2099 \
2100 notproduct(bool, TraceScavenge, false, \
2101 "Trace scavenge") \
2102 \
2103 product_rw(bool, TraceClassLoading, false, \
2104 "Trace all classes loaded") \
2105 \
2106 product(bool, TraceClassLoadingPreorder, false, \
2107 "Trace all classes loaded in order referenced (not loaded)") \
2108 \
2109 product_rw(bool, TraceClassUnloading, false, \
2110 "Trace unloading of classes") \
2111 \
2112 product_rw(bool, TraceLoaderConstraints, false, \
2113 "Trace loader constraints") \
2114 \
2115 product(bool, TraceGen0Time, false, \
2116 "Trace accumulated time for Gen 0 collection") \
2117 \
2118 product(bool, TraceGen1Time, false, \
2119 "Trace accumulated time for Gen 1 collection") \
2120 \
2121 product(bool, PrintTenuringDistribution, false, \
2122 "Print tenuring age information") \
2123 \
2124 product_rw(bool, PrintHeapAtGC, false, \
2125 "Print heap layout before and after each GC") \
2126 \
2127 product_rw(bool, PrintHeapAtGCExtended, false, \
2128 "Prints extended information about the layout of the heap " \
2129 "when -XX:+PrintHeapAtGC is set") \
2130 \
2131 product(bool, PrintHeapAtSIGBREAK, true, \
2132 "Print heap layout in response to SIGBREAK") \
2133 \
2134 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
2135 "Print a class histogram before any major stop-world GC") \
2136 \
2137 manageable(bool, PrintClassHistogramAfterFullGC, false, \
2138 "Print a class histogram after any major stop-world GC") \
2139 \
2140 manageable(bool, PrintClassHistogram, false, \
2141 "Print a histogram of class instances") \
2142 \
2143 develop(bool, TraceWorkGang, false, \
2144 "Trace activities of work gangs") \
2145 \
2146 product(bool, TraceParallelOldGCTasks, false, \
2147 "Trace multithreaded GC activity") \
2148 \
2149 develop(bool, TraceBlockOffsetTable, false, \
2150 "Print BlockOffsetTable maps") \
2151 \
2152 develop(bool, TraceCardTableModRefBS, false, \
2153 "Print CardTableModRefBS maps") \
2154 \
2155 develop(bool, TraceGCTaskManager, false, \
2156 "Trace actions of the GC task manager") \
2157 \
2158 develop(bool, TraceGCTaskQueue, false, \
2159 "Trace actions of the GC task queues") \
2160 \
2161 develop(bool, TraceGCTaskThread, false, \
2162 "Trace actions of the GC task threads") \
2163 \
2164 product(bool, PrintParallelOldGCPhaseTimes, false, \
2165 "Print the time taken by each parallel old gc phase." \
2166 "PrintGCDetails must also be enabled.") \
2167 \
2168 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2169 "Trace parallel old gc marking phase") \
2170 \
2171 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2172 "Trace parallel old gc summary phase") \
2173 \
2174 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2175 "Trace parallel old gc compaction phase") \
2176 \
2177 develop(bool, TraceParallelOldGCDensePrefix, false, \
2178 "Trace parallel old gc dense prefix computation") \
2179 \
2180 develop(bool, IgnoreLibthreadGPFault, false, \
2181 "Suppress workaround for libthread GP fault") \
2182 \
2183 product(bool, PrintJNIGCStalls, false, \
2184 "Print diagnostic message when GC is stalled" \
2185 "by JNI critical section") \
2186 \
2187 /* JVMTI heap profiling */ \
2188 \
2189 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2190 "Trace JVMTI object tagging calls") \
2191 \
2192 diagnostic(bool, VerifyBeforeIteration, false, \
2193 "Verify memory system before JVMTI iteration") \
2194 \
2195 /* compiler interface */ \
2196 \
2197 develop(bool, CIPrintCompilerName, false, \
2198 "when CIPrint is active, print the name of the active compiler") \
2199 \
2200 develop(bool, CIPrintCompileQueue, false, \
2201 "display the contents of the compile queue whenever a " \
2202 "compilation is enqueued") \
2203 \
2204 develop(bool, CIPrintRequests, false, \
2205 "display every request for compilation") \
2206 \
2207 product(bool, CITime, false, \
2208 "collect timing information for compilation") \
2209 \
2210 develop(bool, CITimeEach, false, \
2211 "display timing information after each successful compilation") \
2212 \
2213 develop(bool, CICountOSR, true, \
2214 "use a separate counter when assigning ids to osr compilations") \
2215 \
2216 develop(bool, CICompileNatives, true, \
2217 "compile native methods if supported by the compiler") \
2218 \
2219 develop_pd(bool, CICompileOSR, \
2220 "compile on stack replacement methods if supported by the " \
2221 "compiler") \
2222 \
2223 develop(bool, CIPrintMethodCodes, false, \
2224 "print method bytecodes of the compiled code") \
2225 \
2226 develop(bool, CIPrintTypeFlow, false, \
2227 "print the results of ciTypeFlow analysis") \
2228 \
2229 develop(bool, CITraceTypeFlow, false, \
2230 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2231 \
2232 develop(intx, CICloneLoopTestLimit, 100, \
2233 "size limit for blocks heuristically cloned in ciTypeFlow") \
2234 \
2235 /* temp diagnostics */ \
2236 \
2237 diagnostic(bool, TraceRedundantCompiles, false, \
2238 "Have compile broker print when a request already in the queue is"\
2239 " requested again") \
2240 \
2241 diagnostic(bool, InitialCompileFast, false, \
2242 "Initial compile at CompLevel_fast_compile") \
2243 \
2244 diagnostic(bool, InitialCompileReallyFast, false, \
2245 "Initial compile at CompLevel_really_fast_compile (no profile)") \
2246 \
2247 diagnostic(bool, FullProfileOnReInterpret, true, \
2248 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\
2249 \
2250 /* compiler */ \
2251 \
2252 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2253 "Number of compiler threads to run") \
2254 \
2255 product(intx, CompilationPolicyChoice, 0, \
2256 "which compilation policy (0/1)") \
2257 \
2258 develop(bool, UseStackBanging, true, \
2259 "use stack banging for stack overflow checks (required for " \
2260 "proper StackOverflow handling; disable only to measure cost " \
2261 "of stackbanging)") \
2262 \
2263 develop(bool, Use24BitFPMode, true, \
2264 "Set 24-bit FPU mode on a per-compile basis ") \
2265 \
2266 develop(bool, Use24BitFP, true, \
2267 "use FP instructions that produce 24-bit precise results") \
2268 \
2269 develop(bool, UseStrictFP, true, \
2270 "use strict fp if modifier strictfp is set") \
2271 \
2272 develop(bool, GenerateSynchronizationCode, true, \
2273 "generate locking/unlocking code for synchronized methods and " \
2274 "monitors") \
2275 \
2276 develop(bool, GenerateCompilerNullChecks, true, \
2277 "Generate explicit null checks for loads/stores/calls") \
2278 \
2279 develop(bool, GenerateRangeChecks, true, \
2280 "Generate range checks for array accesses") \
2281 \
2282 develop_pd(bool, ImplicitNullChecks, \
2283 "generate code for implicit null checks") \
2284 \
2285 product(bool, PrintSafepointStatistics, false, \
2286 "print statistics about safepoint synchronization") \
2287 \
2288 product(intx, PrintSafepointStatisticsCount, 300, \
2289 "total number of safepoint statistics collected " \
2290 "before printing them out") \
2291 \
2292 product(intx, PrintSafepointStatisticsTimeout, -1, \
2293 "print safepoint statistics only when safepoint takes" \
2294 " more than PrintSafepointSatisticsTimeout in millis") \
2295 \
2296 product(bool, TraceSafepointCleanupTime, false, \
2297 "print the break down of clean up tasks performed during" \
2298 " safepoint") \
2299 \
2300 develop(bool, InlineAccessors, true, \
2301 "inline accessor methods (get/set)") \
2302 \
2303 product(bool, Inline, true, \
2304 "enable inlining") \
2305 \
2306 product(bool, ClipInlining, true, \
2307 "clip inlining if aggregate method exceeds DesiredMethodLimit") \
2308 \
2309 develop(bool, UseCHA, true, \
2310 "enable CHA") \
2311 \
2312 product(bool, UseTypeProfile, true, \
2313 "Check interpreter profile for historically monomorphic calls") \
2314 \
2315 product(intx, TypeProfileMajorReceiverPercent, 90, \
2316 "% of major receiver type to all profiled receivers") \
2317 \
2318 notproduct(bool, TimeCompiler, false, \
2319 "time the compiler") \
2320 \
2321 notproduct(bool, TimeCompiler2, false, \
2322 "detailed time the compiler (requires +TimeCompiler)") \
2323 \
2324 diagnostic(bool, PrintInlining, false, \
2325 "prints inlining optimizations") \
2326 \
2327 diagnostic(bool, PrintIntrinsics, false, \
2328 "prints attempted and successful inlining of intrinsics") \
2329 \
2330 product(bool, UseCountLeadingZerosInstruction, false, \
2331 "Use count leading zeros instruction") \
2332 \
2333 product(bool, UsePopCountInstruction, false, \
2334 "Use population count instruction") \
2335 \
2336 diagnostic(ccstrlist, DisableIntrinsic, "", \
2337 "do not expand intrinsics whose (internal) names appear here") \
2338 \
2339 develop(bool, StressReflectiveCode, false, \
2340 "Use inexact types at allocations, etc., to test reflection") \
2341 \
2342 develop(bool, EagerInitialization, false, \
2343 "Eagerly initialize classes if possible") \
2344 \
2345 product(bool, Tier1UpdateMethodData, trueInTiered, \
2346 "Update methodDataOops in Tier1-generated code") \
2347 \
2348 develop(bool, TraceMethodReplacement, false, \
2349 "Print when methods are replaced do to recompilation") \
2350 \
2351 develop(bool, PrintMethodFlushing, false, \
2352 "print the nmethods being flushed") \
2353 \
2354 notproduct(bool, LogMultipleMutexLocking, false, \
2355 "log locking and unlocking of mutexes (only if multiple locks " \
2356 "are held)") \
2357 \
2358 develop(bool, UseRelocIndex, false, \
2359 "use an index to speed random access to relocations") \
2360 \
2361 develop(bool, StressCodeBuffers, false, \
2362 "Exercise code buffer expansion and other rare state changes") \
2363 \
2364 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2365 "Generate extra debugging info for non-safepoints in nmethods") \
2366 \
2367 diagnostic(bool, DebugInlinedCalls, true, \
2368 "If false, restricts profiled locations to the root method only") \
2369 \
2370 product(bool, PrintVMOptions, trueInDebug, \
2371 "Print flags that appeared on the command line") \
2372 \
2373 product(bool, IgnoreUnrecognizedVMOptions, false, \
2374 "Ignore unrecognized VM options") \
2375 \
2376 product(bool, PrintCommandLineFlags, false, \
2377 "Print flags specified on command line or set by ergonomics") \
2378 \
2379 product(bool, PrintFlagsInitial, false, \
2380 "Print all VM flags before argument processing and exit VM") \
2381 \
2382 product(bool, PrintFlagsFinal, false, \
2383 "Print all VM flags after argument and ergonomic processing") \
2384 \
2385 diagnostic(bool, SerializeVMOutput, true, \
2386 "Use a mutex to serialize output to tty and hotspot.log") \
2387 \
2388 diagnostic(bool, DisplayVMOutput, true, \
2389 "Display all VM output on the tty, independently of LogVMOutput") \
2390 \
2391 diagnostic(bool, LogVMOutput, trueInDebug, \
2392 "Save VM output to hotspot.log, or to LogFile") \
2393 \
2394 diagnostic(ccstr, LogFile, NULL, \
2395 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \
2396 \
2397 product(ccstr, ErrorFile, NULL, \
2398 "If an error occurs, save the error data to this file " \
2399 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2400 \
2401 product(bool, DisplayVMOutputToStderr, false, \
2402 "If DisplayVMOutput is true, display all VM output to stderr") \
2403 \
2404 product(bool, DisplayVMOutputToStdout, false, \
2405 "If DisplayVMOutput is true, display all VM output to stdout") \
2406 \
2407 product(bool, UseHeavyMonitors, false, \
2408 "use heavyweight instead of lightweight Java monitors") \
2409 \
2410 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2411 "print histogram of the symbol table") \
2412 \
2413 notproduct(bool, ExitVMOnVerifyError, false, \
2414 "standard exit from VM if bytecode verify error " \
2415 "(only in debug mode)") \
2416 \
2417 notproduct(ccstr, AbortVMOnException, NULL, \
2418 "Call fatal if this exception is thrown. Example: " \
2419 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2420 \
2421 develop(bool, DebugVtables, false, \
2422 "add debugging code to vtable dispatch") \
2423 \
2424 develop(bool, PrintVtables, false, \
2425 "print vtables when printing klass") \
2426 \
2427 notproduct(bool, PrintVtableStats, false, \
2428 "print vtables stats at end of run") \
2429 \
2430 develop(bool, TraceCreateZombies, false, \
2431 "trace creation of zombie nmethods") \
2432 \
2433 notproduct(bool, IgnoreLockingAssertions, false, \
2434 "disable locking assertions (for speed)") \
2435 \
2436 notproduct(bool, VerifyLoopOptimizations, false, \
2437 "verify major loop optimizations") \
2438 \
2439 product(bool, RangeCheckElimination, true, \
2440 "Split loop iterations to eliminate range checks") \
2441 \
2442 develop_pd(bool, UncommonNullCast, \
2443 "track occurrences of null in casts; adjust compiler tactics") \
2444 \
2445 develop(bool, TypeProfileCasts, true, \
2446 "treat casts like calls for purposes of type profiling") \
2447 \
2448 develop(bool, MonomorphicArrayCheck, true, \
2449 "Uncommon-trap array store checks that require full type check") \
2450 \
2451 develop(bool, DelayCompilationDuringStartup, true, \
2452 "Delay invoking the compiler until main application class is " \
2453 "loaded") \
2454 \
2455 develop(bool, CompileTheWorld, false, \
2456 "Compile all methods in all classes in bootstrap class path " \
2457 "(stress test)") \
2458 \
2459 develop(bool, CompileTheWorldPreloadClasses, true, \
2460 "Preload all classes used by a class before start loading") \
2461 \
2462 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \
2463 "Compile all methods although class initializer failed") \
2464 \
2465 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2466 "Force a safepoint every n compiles so sweeper can keep up") \
2467 \
2468 develop(bool, TraceIterativeGVN, false, \
2469 "Print progress during Iterative Global Value Numbering") \
2470 \
2471 develop(bool, FillDelaySlots, true, \
2472 "Fill delay slots (on SPARC only)") \
2473 \
2474 develop(bool, VerifyIterativeGVN, false, \
2475 "Verify Def-Use modifications during sparse Iterative Global " \
2476 "Value Numbering") \
2477 \
2478 notproduct(bool, TracePhaseCCP, false, \
2479 "Print progress during Conditional Constant Propagation") \
2480 \
2481 develop(bool, TimeLivenessAnalysis, false, \
2482 "Time computation of bytecode liveness analysis") \
2483 \
2484 develop(bool, TraceLivenessGen, false, \
2485 "Trace the generation of liveness analysis information") \
2486 \
2487 notproduct(bool, TraceLivenessQuery, false, \
2488 "Trace queries of liveness analysis information") \
2489 \
2490 notproduct(bool, CollectIndexSetStatistics, false, \
2491 "Collect information about IndexSets") \
2492 \
2493 develop(bool, PrintDominators, false, \
2494 "Print out dominator trees for GVN") \
2495 \
2496 develop(bool, UseLoopSafepoints, true, \
2497 "Generate Safepoint nodes in every loop") \
2498 \
2499 notproduct(bool, TraceCISCSpill, false, \
2500 "Trace allocators use of cisc spillable instructions") \
2501 \
2502 notproduct(bool, TraceSpilling, false, \
2503 "Trace spilling") \
2504 \
2505 product(bool, SplitIfBlocks, true, \
2506 "Clone compares and control flow through merge points to fold " \
2507 "some branches") \
2508 \
2509 develop(intx, FastAllocateSizeLimit, 128*K, \
2510 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2511 "Inline allocations larger than this in doublewords must go slow")\
2512 \
2513 product(bool, AggressiveOpts, false, \
2514 "Enable aggressive optimizations - see arguments.cpp") \
2515 \
2516 product(bool, UseStringCache, false, \
2517 "Enable String cache capabilities on String.java") \
2518 \
2519 /* statistics */ \
2520 develop(bool, UseVTune, false, \
2521 "enable support for Intel's VTune profiler") \
2522 \
2523 develop(bool, CountCompiledCalls, false, \
2524 "counts method invocations") \
2525 \
2526 notproduct(bool, CountRuntimeCalls, false, \
2527 "counts VM runtime calls") \
2528 \
2529 develop(bool, CountJNICalls, false, \
2530 "counts jni method invocations") \
2531 \
2532 notproduct(bool, CountJVMCalls, false, \
2533 "counts jvm method invocations") \
2534 \
2535 notproduct(bool, CountRemovableExceptions, false, \
2536 "count exceptions that could be replaced by branches due to " \
2537 "inlining") \
2538 \
2539 notproduct(bool, ICMissHistogram, false, \
2540 "produce histogram of IC misses") \
2541 \
2542 notproduct(bool, PrintClassStatistics, false, \
2543 "prints class statistics at end of run") \
2544 \
2545 notproduct(bool, PrintMethodStatistics, false, \
2546 "prints method statistics at end of run") \
2547 \
2548 /* interpreter */ \
2549 develop(bool, ClearInterpreterLocals, false, \
2550 "Always clear local variables of interpreter activations upon " \
2551 "entry") \
2552 \
2553 product_pd(bool, RewriteBytecodes, \
2554 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2555 \
2556 product_pd(bool, RewriteFrequentPairs, \
2557 "Rewrite frequently used bytecode pairs into a single bytecode") \
2558 \
2559 diagnostic(bool, PrintInterpreter, false, \
2560 "Prints the generated interpreter code") \
2561 \
2562 product(bool, UseInterpreter, true, \
2563 "Use interpreter for non-compiled methods") \
2564 \
2565 develop(bool, UseFastSignatureHandlers, true, \
2566 "Use fast signature handlers for native calls") \
2567 \
2568 develop(bool, UseV8InstrsOnly, false, \
2569 "Use SPARC-V8 Compliant instruction subset") \
2570 \
2571 product(bool, UseNiagaraInstrs, false, \
2572 "Use Niagara-efficient instruction subset") \
2573 \
2574 develop(bool, UseCASForSwap, false, \
2575 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\
2576 \
2577 product(bool, UseLoopCounter, true, \
2578 "Increment invocation counter on backward branch") \
2579 \
2580 product(bool, UseFastEmptyMethods, true, \
2581 "Use fast method entry code for empty methods") \
2582 \
2583 product(bool, UseFastAccessorMethods, true, \
2584 "Use fast method entry code for accessor methods") \
2585 \
2586 product_pd(bool, UseOnStackReplacement, \
2587 "Use on stack replacement, calls runtime if invoc. counter " \
2588 "overflows in loop") \
2589 \
2590 notproduct(bool, TraceOnStackReplacement, false, \
2591 "Trace on stack replacement") \
2592 \
2593 develop(bool, PoisonOSREntry, true, \
2594 "Detect abnormal calls to OSR code") \
2595 \
2596 product_pd(bool, PreferInterpreterNativeStubs, \
2597 "Use always interpreter stubs for native methods invoked via " \
2598 "interpreter") \
2599 \
2600 develop(bool, CountBytecodes, false, \
2601 "Count number of bytecodes executed") \
2602 \
2603 develop(bool, PrintBytecodeHistogram, false, \
2604 "Print histogram of the executed bytecodes") \
2605 \
2606 develop(bool, PrintBytecodePairHistogram, false, \
2607 "Print histogram of the executed bytecode pairs") \
2608 \
2609 diagnostic(bool, PrintSignatureHandlers, false, \
2610 "Print code generated for native method signature handlers") \
2611 \
2612 develop(bool, VerifyOops, false, \
2613 "Do plausibility checks for oops") \
2614 \
2615 develop(bool, CheckUnhandledOops, false, \
2616 "Check for unhandled oops in VM code") \
2617 \
2618 develop(bool, VerifyJNIFields, trueInDebug, \
2619 "Verify jfieldIDs for instance fields") \
2620 \
2621 notproduct(bool, VerifyJNIEnvThread, false, \
2622 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2623 "from JNI") \
2624 \
2625 develop(bool, VerifyFPU, false, \
2626 "Verify FPU state (check for NaN's, etc.)") \
2627 \
2628 develop(bool, VerifyThread, false, \
2629 "Watch the thread register for corruption (SPARC only)") \
2630 \
2631 develop(bool, VerifyActivationFrameSize, false, \
2632 "Verify that activation frame didn't become smaller than its " \
2633 "minimal size") \
2634 \
2635 develop(bool, TraceFrequencyInlining, false, \
2636 "Trace frequency based inlining") \
2637 \
2638 notproduct(bool, TraceTypeProfile, false, \
2639 "Trace type profile") \
2640 \
2641 develop_pd(bool, InlineIntrinsics, \
2642 "Inline intrinsics that can be statically resolved") \
2643 \
2644 product_pd(bool, ProfileInterpreter, \
2645 "Profile at the bytecode level during interpretation") \
2646 \
2647 develop_pd(bool, ProfileTraps, \
2648 "Profile deoptimization traps at the bytecode level") \
2649 \
2650 product(intx, ProfileMaturityPercentage, 20, \
2651 "number of method invocations/branches (expressed as % of " \
2652 "CompileThreshold) before using the method's profile") \
2653 \
2654 develop(bool, PrintMethodData, false, \
2655 "Print the results of +ProfileInterpreter at end of run") \
2656 \
2657 develop(bool, VerifyDataPointer, trueInDebug, \
2658 "Verify the method data pointer during interpreter profiling") \
2659 \
2660 develop(bool, VerifyCompiledCode, false, \
2661 "Include miscellaneous runtime verifications in nmethod code; " \
2662 "default off because it disturbs nmethod size heuristics") \
2663 \
2664 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2665 "Manually make GC thread crash then dump java stack trace; " \
2666 "Test only") \
2667 \
2668 /* compilation */ \
2669 product(bool, UseCompiler, true, \
2670 "use compilation") \
2671 \
2672 develop(bool, TraceCompilationPolicy, false, \
2673 "Trace compilation policy") \
2674 \
2675 develop(bool, TimeCompilationPolicy, false, \
2676 "Time the compilation policy") \
2677 \
2678 product(bool, UseCounterDecay, true, \
2679 "adjust recompilation counters") \
2680 \
2681 develop(intx, CounterHalfLifeTime, 30, \
2682 "half-life time of invocation counters (in secs)") \
2683 \
2684 develop(intx, CounterDecayMinIntervalLength, 500, \
2685 "Min. ms. between invocation of CounterDecay") \
2686 \
2687 product(bool, AlwaysCompileLoopMethods, false, \
2688 "when using recompilation, never interpret methods " \
2689 "containing loops") \
2690 \
2691 product(bool, DontCompileHugeMethods, true, \
2692 "don't compile methods > HugeMethodLimit") \
2693 \
2694 /* Bytecode escape analysis estimation. */ \
2695 product(bool, EstimateArgEscape, true, \
2696 "Analyze bytecodes to estimate escape state of arguments") \
2697 \
2698 product(intx, BCEATraceLevel, 0, \
2699 "How much tracing to do of bytecode escape analysis estimates") \
2700 \
2701 product(intx, MaxBCEAEstimateLevel, 5, \
2702 "Maximum number of nested calls that are analyzed by BC EA.") \
2703 \
2704 product(intx, MaxBCEAEstimateSize, 150, \
2705 "Maximum bytecode size of a method to be analyzed by BC EA.") \
2706 \
2707 product(intx, AllocatePrefetchStyle, 1, \
2708 "0 = no prefetch, " \
2709 "1 = prefetch instructions for each allocation, " \
2710 "2 = use TLAB watermark to gate allocation prefetch") \
2711 \
2712 product(intx, AllocatePrefetchDistance, -1, \
2713 "Distance to prefetch ahead of allocation pointer") \
2714 \
2715 product(intx, AllocatePrefetchLines, 1, \
2716 "Number of lines to prefetch ahead of allocation pointer") \
2717 \
2718 product(intx, AllocatePrefetchStepSize, 16, \
2719 "Step size in bytes of sequential prefetch instructions") \
2720 \
2721 product(intx, AllocatePrefetchInstr, 0, \
2722 "Prefetch instruction to prefetch ahead of allocation pointer") \
2723 \
2724 product(intx, ReadPrefetchInstr, 0, \
2725 "Prefetch instruction to prefetch ahead") \
2726 \
2727 /* deoptimization */ \
2728 develop(bool, TraceDeoptimization, false, \
2729 "Trace deoptimization") \
2730 \
2731 develop(bool, DebugDeoptimization, false, \
2732 "Tracing various information while debugging deoptimization") \
2733 \
2734 product(intx, SelfDestructTimer, 0, \
2735 "Will cause VM to terminate after a given time (in minutes) " \
2736 "(0 means off)") \
2737 \
2738 product(intx, MaxJavaStackTraceDepth, 1024, \
2739 "Max. no. of lines in the stack trace for Java exceptions " \
2740 "(0 means all)") \
2741 \
2742 develop(intx, GuaranteedSafepointInterval, 1000, \
2743 "Guarantee a safepoint (at least) every so many milliseconds " \
2744 "(0 means none)") \
2745 \
2746 product(intx, SafepointTimeoutDelay, 10000, \
2747 "Delay in milliseconds for option SafepointTimeout") \
2748 \
2749 product(intx, NmethodSweepFraction, 4, \
2750 "Number of invocations of sweeper to cover all nmethods") \
2751 \
2752 notproduct(intx, MemProfilingInterval, 500, \
2753 "Time between each invocation of the MemProfiler") \
2754 \
2755 develop(intx, MallocCatchPtr, -1, \
2756 "Hit breakpoint when mallocing/freeing this pointer") \
2757 \
2758 notproduct(intx, AssertRepeat, 1, \
2759 "number of times to evaluate expression in assert " \
2760 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
2761 \
2762 notproduct(ccstrlist, SuppressErrorAt, "", \
2763 "List of assertions (file:line) to muzzle") \
2764 \
2765 notproduct(uintx, HandleAllocationLimit, 1024, \
2766 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2767 "is used") \
2768 \
2769 develop(uintx, TotalHandleAllocationLimit, 1024, \
2770 "Threshold for total handle allocation when " \
2771 "+TraceHandleAllocation is used") \
2772 \
2773 develop(intx, StackPrintLimit, 100, \
2774 "number of stack frames to print in VM-level stack dump") \
2775 \
2776 notproduct(intx, MaxElementPrintSize, 256, \
2777 "maximum number of elements to print") \
2778 \
2779 notproduct(intx, MaxSubklassPrintSize, 4, \
2780 "maximum number of subklasses to print when printing klass") \
2781 \
2782 product(intx, MaxInlineLevel, 9, \
2783 "maximum number of nested calls that are inlined") \
2784 \
2785 product(intx, MaxRecursiveInlineLevel, 1, \
2786 "maximum number of nested recursive calls that are inlined") \
2787 \
2788 product_pd(intx, InlineSmallCode, \
2789 "Only inline already compiled methods if their code size is " \
2790 "less than this") \
2791 \
2792 product(intx, MaxInlineSize, 35, \
2793 "maximum bytecode size of a method to be inlined") \
2794 \
2795 product_pd(intx, FreqInlineSize, \
2796 "maximum bytecode size of a frequent method to be inlined") \
2797 \
2798 product(intx, MaxTrivialSize, 6, \
2799 "maximum bytecode size of a trivial method to be inlined") \
2800 \
2801 product(intx, MinInliningThreshold, 250, \
2802 "min. invocation count a method needs to have to be inlined") \
2803 \
2804 develop(intx, AlignEntryCode, 4, \
2805 "aligns entry code to specified value (in bytes)") \
2806 \
2807 develop(intx, MethodHistogramCutoff, 100, \
2808 "cutoff value for method invoc. histogram (+CountCalls)") \
2809 \
2810 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
2811 "# of interpreted methods to show in profile") \
2812 \
2813 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
2814 "# of compiled methods to show in profile") \
2815 \
2816 develop(intx, ProfilerNumberOfStubMethods, 25, \
2817 "# of stub methods to show in profile") \
2818 \
2819 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
2820 "# of runtime stub nodes to show in profile") \
2821 \
2822 product(intx, ProfileIntervalsTicks, 100, \
2823 "# of ticks between printing of interval profile " \
2824 "(+ProfileIntervals)") \
2825 \
2826 notproduct(intx, ScavengeALotInterval, 1, \
2827 "Interval between which scavenge will occur with +ScavengeALot") \
2828 \
2829 notproduct(intx, FullGCALotInterval, 1, \
2830 "Interval between which full gc will occur with +FullGCALot") \
2831 \
2832 notproduct(intx, FullGCALotStart, 0, \
2833 "For which invocation to start FullGCAlot") \
2834 \
2835 notproduct(intx, FullGCALotDummies, 32*K, \
2836 "Dummy object allocated with +FullGCALot, forcing all objects " \
2837 "to move") \
2838 \
2839 develop(intx, DontYieldALotInterval, 10, \
2840 "Interval between which yields will be dropped (milliseconds)") \
2841 \
2842 develop(intx, MinSleepInterval, 1, \
2843 "Minimum sleep() interval (milliseconds) when " \
2844 "ConvertSleepToYield is off (used for SOLARIS)") \
2845 \
2846 product(intx, EventLogLength, 2000, \
2847 "maximum nof events in event log") \
2848 \
2849 develop(intx, ProfilerPCTickThreshold, 15, \
2850 "Number of ticks in a PC buckets to be a hotspot") \
2851 \
2852 notproduct(intx, DeoptimizeALotInterval, 5, \
2853 "Number of exits until DeoptimizeALot kicks in") \
2854 \
2855 notproduct(intx, ZombieALotInterval, 5, \
2856 "Number of exits until ZombieALot kicks in") \
2857 \
2858 develop(bool, StressNonEntrant, false, \
2859 "Mark nmethods non-entrant at registration") \
2860 \
2861 diagnostic(intx, MallocVerifyInterval, 0, \
2862 "if non-zero, verify C heap after every N calls to " \
2863 "malloc/realloc/free") \
2864 \
2865 diagnostic(intx, MallocVerifyStart, 0, \
2866 "if non-zero, start verifying C heap after Nth call to " \
2867 "malloc/realloc/free") \
2868 \
2869 product(intx, TypeProfileWidth, 2, \
2870 "number of receiver types to record in call/cast profile") \
2871 \
2872 develop(intx, BciProfileWidth, 2, \
2873 "number of return bci's to record in ret profile") \
2874 \
2875 product(intx, PerMethodRecompilationCutoff, 400, \
2876 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
2877 \
2878 product(intx, PerBytecodeRecompilationCutoff, 200, \
2879 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
2880 \
2881 product(intx, PerMethodTrapLimit, 100, \
2882 "Limit on traps (of one kind) in a method (includes inlines)") \
2883 \
2884 product(intx, PerBytecodeTrapLimit, 4, \
2885 "Limit on traps (of one kind) at a particular BCI") \
2886 \
2887 develop(intx, FreqCountInvocations, 1, \
2888 "Scaling factor for branch frequencies (deprecated)") \
2889 \
2890 develop(intx, InlineFrequencyRatio, 20, \
2891 "Ratio of call site execution to caller method invocation") \
2892 \
2893 develop_pd(intx, InlineFrequencyCount, \
2894 "Count of call site execution necessary to trigger frequent " \
2895 "inlining") \
2896 \
2897 develop(intx, InlineThrowCount, 50, \
2898 "Force inlining of interpreted methods that throw this often") \
2899 \
2900 develop(intx, InlineThrowMaxSize, 200, \
2901 "Force inlining of throwing methods smaller than this") \
2902 \
2903 product(intx, AliasLevel, 3, \
2904 "0 for no aliasing, 1 for oop/field/static/array split, " \
2905 "2 for class split, 3 for unique instances") \
2906 \
2907 develop(bool, VerifyAliases, false, \
2908 "perform extra checks on the results of alias analysis") \
2909 \
2910 develop(intx, ProfilerNodeSize, 1024, \
2911 "Size in K to allocate for the Profile Nodes of each thread") \
2912 \
2913 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \
2914 "Number of times to spin wait on a v8 atomic operation lock") \
2915 \
2916 product(intx, ReadSpinIterations, 100, \
2917 "Number of read attempts before a yield (spin inner loop)") \
2918 \
2919 product_pd(intx, PreInflateSpin, \
2920 "Number of times to spin wait before inflation") \
2921 \
2922 product(intx, PreBlockSpin, 10, \
2923 "Number of times to spin in an inflated lock before going to " \
2924 "an OS lock") \
2925 \
2926 /* gc parameters */ \
2927 product(uintx, InitialHeapSize, 0, \
2928 "Initial heap size (in bytes); zero means OldSize + NewSize") \
2929 \
2930 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \
2931 "Maximum heap size (in bytes)") \
2932 \
2933 product(uintx, OldSize, ScaleForWordSize(4*M), \
2934 "Initial tenured generation size (in bytes)") \
2935 \
2936 product(uintx, NewSize, ScaleForWordSize(1*M), \
2937 "Initial new generation size (in bytes)") \
2938 \
2939 product(uintx, MaxNewSize, max_uintx, \
2940 "Maximum new generation size (in bytes), max_uintx means set " \
2941 "ergonomically") \
2942 \
2943 product(uintx, PretenureSizeThreshold, 0, \
2944 "Maximum size in bytes of objects allocated in DefNew " \
2945 "generation; zero means no maximum") \
2946 \
2947 product(uintx, TLABSize, 0, \
2948 "Starting TLAB size (in bytes); zero means set ergonomically") \
2949 \
2950 product(uintx, MinTLABSize, 2*K, \
2951 "Minimum allowed TLAB size (in bytes)") \
2952 \
2953 product(uintx, TLABAllocationWeight, 35, \
2954 "Allocation averaging weight") \
2955 \
2956 product(uintx, TLABWasteTargetPercent, 1, \
2957 "Percentage of Eden that can be wasted") \
2958 \
2959 product(uintx, TLABRefillWasteFraction, 64, \
2960 "Max TLAB waste at a refill (internal fragmentation)") \
2961 \
2962 product(uintx, TLABWasteIncrement, 4, \
2963 "Increment allowed waste at slow allocation") \
2964 \
2965 product(intx, SurvivorRatio, 8, \
2966 "Ratio of eden/survivor space size") \
2967 \
2968 product(intx, NewRatio, 2, \
2969 "Ratio of new/old generation sizes") \
2970 \
2971 product(uintx, MaxLiveObjectEvacuationRatio, 100, \
2972 "Max percent of eden objects that will be live at scavenge") \
2973 \
2974 product_pd(uintx, NewSizeThreadIncrease, \
2975 "Additional size added to desired new generation size per " \
2976 "non-daemon thread (in bytes)") \
2977 \
2978 product_pd(uintx, PermSize, \
2979 "Initial size of permanent generation (in bytes)") \
2980 \
2981 product_pd(uintx, MaxPermSize, \
2982 "Maximum size of permanent generation (in bytes)") \
2983 \
2984 product(uintx, MinHeapFreeRatio, 40, \
2985 "Min percentage of heap free after GC to avoid expansion") \
2986 \
2987 product(uintx, MaxHeapFreeRatio, 70, \
2988 "Max percentage of heap free after GC to avoid shrinking") \
2989 \
2990 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
2991 "Number of milliseconds per MB of free space in the heap") \
2992 \
2993 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
2994 "Min change in heap space due to GC (in bytes)") \
2995 \
2996 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \
2997 "Min expansion of permanent heap (in bytes)") \
2998 \
2999 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \
3000 "Max expansion of permanent heap without full GC (in bytes)") \
3001 \
3002 product(intx, QueuedAllocationWarningCount, 0, \
3003 "Number of times an allocation that queues behind a GC " \
3004 "will retry before printing a warning") \
3005 \
3006 diagnostic(uintx, VerifyGCStartAt, 0, \
3007 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3008 \
3009 diagnostic(intx, VerifyGCLevel, 0, \
3010 "Generation level at which to start +VerifyBefore/AfterGC") \
3011 \
3012 develop(uintx, ExitAfterGCNum, 0, \
3013 "If non-zero, exit after this GC.") \
3014 \
3015 product(intx, MaxTenuringThreshold, 15, \
3016 "Maximum value for tenuring threshold") \
3017 \
3018 product(intx, InitialTenuringThreshold, 7, \
3019 "Initial value for tenuring threshold") \
3020 \
3021 product(intx, TargetSurvivorRatio, 50, \
3022 "Desired percentage of survivor space used after scavenge") \
3023 \
3024 product(uintx, MarkSweepDeadRatio, 5, \
3025 "Percentage (0-100) of the old gen allowed as dead wood." \
3026 "Serial mark sweep treats this as both the min and max value." \
3027 "CMS uses this value only if it falls back to mark sweep." \
3028 "Par compact uses a variable scale based on the density of the" \
3029 "generation and treats this as the max value when the heap is" \
3030 "either completely full or completely empty. Par compact also" \
3031 "has a smaller default value; see arguments.cpp.") \
3032 \
3033 product(uintx, PermMarkSweepDeadRatio, 20, \
3034 "Percentage (0-100) of the perm gen allowed as dead wood." \
3035 "See MarkSweepDeadRatio for collector-specific comments.") \
3036 \
3037 product(intx, MarkSweepAlwaysCompactCount, 4, \
3038 "How often should we fully compact the heap (ignoring the dead " \
3039 "space parameters)") \
3040 \
3041 product(intx, PrintCMSStatistics, 0, \
3042 "Statistics for CMS") \
3043 \
3044 product(bool, PrintCMSInitiationStatistics, false, \
3045 "Statistics for initiating a CMS collection") \
3046 \
3047 product(intx, PrintFLSStatistics, 0, \
3048 "Statistics for CMS' FreeListSpace") \
3049 \
3050 product(intx, PrintFLSCensus, 0, \
3051 "Census for CMS' FreeListSpace") \
3052 \
3053 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3054 "Delay in ms between expansion and allocation") \
3055 \
3056 product(intx, DeferThrSuspendLoopCount, 4000, \
3057 "(Unstable) Number of times to iterate in safepoint loop " \
3058 " before blocking VM threads ") \
3059 \
3060 product(intx, DeferPollingPageLoopCount, -1, \
3061 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3062 "before changing safepoint polling page to RO ") \
3063 \
3064 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3065 \
3066 product(bool, UseDepthFirstScavengeOrder, true, \
3067 "true: the scavenge order will be depth-first, " \
3068 "false: the scavenge order will be breadth-first") \
3069 \
3070 product(bool, PSChunkLargeArrays, true, \
3071 "true: process large arrays in chunks") \
3072 \
3073 product(uintx, GCDrainStackTargetSize, 64, \
3074 "how many entries we'll try to leave on the stack during " \
3075 "parallel GC") \
3076 \
3077 product(bool, PSResizeByFreeRatioWithSystemGC, false, \
3078 "Resize the heap by free ratio in System.gc() " \
3079 "under UseParallelGC") \
3080 \
3081 /* stack parameters */ \
3082 product_pd(intx, StackYellowPages, \
3083 "Number of yellow zone (recoverable overflows) pages") \
3084 \
3085 product_pd(intx, StackRedPages, \
3086 "Number of red zone (unrecoverable overflows) pages") \
3087 \
3088 product_pd(intx, StackShadowPages, \
3089 "Number of shadow zone (for overflow checking) pages" \
3090 " this should exceed the depth of the VM and native call stack") \
3091 \
3092 product_pd(intx, ThreadStackSize, \
3093 "Thread Stack Size (in Kbytes)") \
3094 \
3095 product_pd(intx, VMThreadStackSize, \
3096 "Non-Java Thread Stack Size (in Kbytes)") \
3097 \
3098 product_pd(intx, CompilerThreadStackSize, \
3099 "Compiler Thread Stack Size (in Kbytes)") \
3100 \
3101 develop_pd(uintx, JVMInvokeMethodSlack, \
3102 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3103 \
3104 product(uintx, ThreadSafetyMargin, 50*M, \
3105 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
3106 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
3107 "disable this feature") \
3108 \
3109 /* code cache parameters */ \
3110 develop(uintx, CodeCacheSegmentSize, 64, \
3111 "Code cache segment size (in bytes) - smallest unit of " \
3112 "allocation") \
3113 \
3114 develop_pd(intx, CodeEntryAlignment, \
3115 "Code entry alignment for generated code (in bytes)") \
3116 \
3117 product_pd(uintx, InitialCodeCacheSize, \
3118 "Initial code cache size (in bytes)") \
3119 \
3120 product_pd(uintx, ReservedCodeCacheSize, \
3121 "Reserved code cache size (in bytes) - maximum code cache size") \
3122 \
3123 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
3124 "When less than X space left, we stop compiling.") \
3125 \
3126 product_pd(uintx, CodeCacheExpansionSize, \
3127 "Code cache expansion size (in bytes)") \
3128 \
3129 develop_pd(uintx, CodeCacheMinBlockLength, \
3130 "Minimum number of segments in a code cache block.") \
3131 \
3132 notproduct(bool, ExitOnFullCodeCache, false, \
3133 "Exit the VM if we fill the code cache.") \
3134 \
3135 product(bool, UseCodeCacheFlushing, false, \
3136 "Attempt to clean the code cache before shutting off compiler") \
3137 \
3138 product(intx, MinCodeCacheFlushingInterval, 30, \
3139 "Min number of seconds between code cache cleaning sessions") \
3140 \
3141 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \
3142 "When less than X space left, start code cache cleaning") \
3143 \
3144 /* interpreter debugging */ \
3145 develop(intx, BinarySwitchThreshold, 5, \
3146 "Minimal number of lookupswitch entries for rewriting to binary " \
3147 "switch") \
3148 \
3149 develop(intx, StopInterpreterAt, 0, \
3150 "Stops interpreter execution at specified bytecode number") \
3151 \
3152 develop(intx, TraceBytecodesAt, 0, \
3153 "Traces bytecodes starting with specified bytecode number") \
3154 \
3155 /* compiler interface */ \
3156 develop(intx, CIStart, 0, \
3157 "the id of the first compilation to permit") \
3158 \
3159 develop(intx, CIStop, -1, \
3160 "the id of the last compilation to permit") \
3161 \
3162 develop(intx, CIStartOSR, 0, \
3163 "the id of the first osr compilation to permit " \
3164 "(CICountOSR must be on)") \
3165 \
3166 develop(intx, CIStopOSR, -1, \
3167 "the id of the last osr compilation to permit " \
3168 "(CICountOSR must be on)") \
3169 \
3170 develop(intx, CIBreakAtOSR, -1, \
3171 "id of osr compilation to break at") \
3172 \
3173 develop(intx, CIBreakAt, -1, \
3174 "id of compilation to break at") \
3175 \
3176 product(ccstrlist, CompileOnly, "", \
3177 "List of methods (pkg/class.name) to restrict compilation to") \
3178 \
3179 product(ccstr, CompileCommandFile, NULL, \
3180 "Read compiler commands from this file [.hotspot_compiler]") \
3181 \
3182 product(ccstrlist, CompileCommand, "", \
3183 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3184 \
3185 product(bool, CICompilerCountPerCPU, false, \
3186 "1 compiler thread for log(N CPUs)") \
3187 \
3188 develop(intx, CIFireOOMAt, -1, \
3189 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3190 "(non-negative value throws OOM after this many CI accesses " \
3191 "in each compile)") \
3192 \
3193 develop(intx, CIFireOOMAtDelay, -1, \
3194 "Wait for this many CI accesses to occur in all compiles before " \
3195 "beginning to throw OutOfMemoryErrors in each compile") \
3196 \
3197 notproduct(bool, CIObjectFactoryVerify, false, \
3198 "enable potentially expensive verification in ciObjectFactory") \
3199 \
3200 /* Priorities */ \
3201 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3202 \
3203 product(intx, ThreadPriorityPolicy, 0, \
3204 "0 : Normal. "\
3205 " VM chooses priorities that are appropriate for normal "\
3206 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3207 " to normal native priority. Java priorities below NORM_PRIORITY"\
3208 " map to lower native priority values. On Windows applications"\
3209 " are allowed to use higher native priorities. However, with "\
3210 " ThreadPriorityPolicy=0, VM will not use the highest possible"\
3211 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\
3212 " interfere with system threads. On Linux thread priorities "\
3213 " are ignored because the OS does not support static priority "\
3214 " in SCHED_OTHER scheduling class which is the only choice for"\
3215 " non-root, non-realtime applications. "\
3216 "1 : Aggressive. "\
3217 " Java thread priorities map over to the entire range of "\
3218 " native thread priorities. Higher Java thread priorities map "\
3219 " to higher native thread priorities. This policy should be "\
3220 " used with care, as sometimes it can cause performance "\
3221 " degradation in the application and/or the entire system. On "\
3222 " Linux this policy requires root privilege.") \
3223 \
3224 product(bool, ThreadPriorityVerbose, false, \
3225 "print priority changes") \
3226 \
3227 product(intx, DefaultThreadPriority, -1, \
3228 "what native priority threads run at if not specified elsewhere (-1 means no change)") \
3229 \
3230 product(intx, CompilerThreadPriority, -1, \
3231 "what priority should compiler threads run at (-1 means no change)") \
3232 \
3233 product(intx, VMThreadPriority, -1, \
3234 "what priority should VM threads run at (-1 means no change)") \
3235 \
3236 product(bool, CompilerThreadHintNoPreempt, true, \
3237 "(Solaris only) Give compiler threads an extra quanta") \
3238 \
3239 product(bool, VMThreadHintNoPreempt, false, \
3240 "(Solaris only) Give VM thread an extra quanta") \
3241 \
3242 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3243 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3244 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3245 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3246 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3247 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3248 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3249 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3250 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3251 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \
3252 \
3253 /* compiler debugging */ \
3254 notproduct(intx, CompileTheWorldStartAt, 1, \
3255 "First class to consider when using +CompileTheWorld") \
3256 \
3257 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3258 "Last class to consider when using +CompileTheWorld") \
3259 \
3260 develop(intx, NewCodeParameter, 0, \
3261 "Testing Only: Create a dedicated integer parameter before " \
3262 "putback") \
3263 \
3264 /* new oopmap storage allocation */ \
3265 develop(intx, MinOopMapAllocation, 8, \
3266 "Minimum number of OopMap entries in an OopMapSet") \
3267 \
3268 /* Background Compilation */ \
3269 develop(intx, LongCompileThreshold, 50, \
3270 "Used with +TraceLongCompiles") \
3271 \
3272 product(intx, StarvationMonitorInterval, 200, \
3273 "Pause between each check in ms") \
3274 \
3275 /* recompilation */ \
3276 product_pd(intx, CompileThreshold, \
3277 "number of interpreted method invocations before (re-)compiling") \
3278 \
3279 product_pd(intx, BackEdgeThreshold, \
3280 "Interpreter Back edge threshold at which an OSR compilation is invoked")\
3281 \
3282 product(intx, Tier1BytecodeLimit, 10, \
3283 "Must have at least this many bytecodes before tier1" \
3284 "invocation counters are used") \
3285 \
3286 product_pd(intx, Tier2CompileThreshold, \
3287 "threshold at which a tier 2 compilation is invoked") \
3288 \
3289 product_pd(intx, Tier2BackEdgeThreshold, \
3290 "Back edge threshold at which a tier 2 compilation is invoked") \
3291 \
3292 product_pd(intx, Tier3CompileThreshold, \
3293 "threshold at which a tier 3 compilation is invoked") \
3294 \
3295 product_pd(intx, Tier3BackEdgeThreshold, \
3296 "Back edge threshold at which a tier 3 compilation is invoked") \
3297 \
3298 product_pd(intx, Tier4CompileThreshold, \
3299 "threshold at which a tier 4 compilation is invoked") \
3300 \
3301 product_pd(intx, Tier4BackEdgeThreshold, \
3302 "Back edge threshold at which a tier 4 compilation is invoked") \
3303 \
3304 product_pd(bool, TieredCompilation, \
3305 "Enable two-tier compilation") \
3306 \
3307 product(bool, StressTieredRuntime, false, \
3308 "Alternate client and server compiler on compile requests") \
3309 \
3310 product_pd(intx, OnStackReplacePercentage, \
3311 "NON_TIERED number of method invocations/branches (expressed as %"\
3312 "of CompileThreshold) before (re-)compiling OSR code") \
3313 \
3314 product(intx, InterpreterProfilePercentage, 33, \
3315 "NON_TIERED number of method invocations/branches (expressed as %"\
3316 "of CompileThreshold) before profiling in the interpreter") \
3317 \
3318 develop(intx, MaxRecompilationSearchLength, 10, \
3319 "max. # frames to inspect searching for recompilee") \
3320 \
3321 develop(intx, MaxInterpretedSearchLength, 3, \
3322 "max. # interp. frames to skip when searching for recompilee") \
3323 \
3324 develop(intx, DesiredMethodLimit, 8000, \
3325 "desired max. method size (in bytecodes) after inlining") \
3326 \
3327 develop(intx, HugeMethodLimit, 8000, \
3328 "don't compile methods larger than this if " \
3329 "+DontCompileHugeMethods") \
3330 \
3331 /* New JDK 1.4 reflection implementation */ \
3332 \
3333 develop(bool, UseNewReflection, true, \
3334 "Temporary flag for transition to reflection based on dynamic " \
3335 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3336 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3337 "changes were needed") \
3338 \
3339 develop(bool, VerifyReflectionBytecodes, false, \
3340 "Force verification of 1.4 reflection bytecodes. Does not work " \
3341 "in situations like that described in 4486457 or for " \
3342 "constructors generated for serialization, so can not be enabled "\
3343 "in product.") \
3344 \
3345 product(bool, ReflectionWrapResolutionErrors, true, \
3346 "Temporary flag for transition to AbstractMethodError wrapped " \
3347 "in InvocationTargetException. See 6531596") \
3348 \
3349 \
3350 develop(intx, FastSuperclassLimit, 8, \
3351 "Depth of hardwired instanceof accelerator array") \
3352 \
3353 /* Properties for Java libraries */ \
3354 \
3355 product(intx, MaxDirectMemorySize, -1, \
3356 "Maximum total size of NIO direct-buffer allocations") \
3357 \
3358 /* temporary developer defined flags */ \
3359 \
3360 diagnostic(bool, UseNewCode, false, \
3361 "Testing Only: Use the new version while testing") \
3362 \
3363 diagnostic(bool, UseNewCode2, false, \
3364 "Testing Only: Use the new version while testing") \
3365 \
3366 diagnostic(bool, UseNewCode3, false, \
3367 "Testing Only: Use the new version while testing") \
3368 \
3369 /* flags for performance data collection */ \
3370 \
3371 product(bool, UsePerfData, true, \
3372 "Flag to disable jvmstat instrumentation for performance testing" \
3373 "and problem isolation purposes.") \
3374 \
3375 product(bool, PerfDataSaveToFile, false, \
3376 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3377 \
3378 product(ccstr, PerfDataSaveFile, NULL, \
3379 "Save PerfData memory to the specified absolute pathname," \
3380 "%p in the file name if present will be replaced by pid") \
3381 \
3382 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \
3383 "Data sampling interval in milliseconds") \
3384 \
3385 develop(bool, PerfTraceDataCreation, false, \
3386 "Trace creation of Performance Data Entries") \
3387 \
3388 develop(bool, PerfTraceMemOps, false, \
3389 "Trace PerfMemory create/attach/detach calls") \
3390 \
3391 product(bool, PerfDisableSharedMem, false, \
3392 "Store performance data in standard memory") \
3393 \
3394 product(intx, PerfDataMemorySize, 32*K, \
3395 "Size of performance data memory region. Will be rounded " \
3396 "up to a multiple of the native os page size.") \
3397 \
3398 product(intx, PerfMaxStringConstLength, 1024, \
3399 "Maximum PerfStringConstant string length before truncation") \
3400 \
3401 product(bool, PerfAllowAtExitRegistration, false, \
3402 "Allow registration of atexit() methods") \
3403 \
3404 product(bool, PerfBypassFileSystemCheck, false, \
3405 "Bypass Win32 file system criteria checks (Windows Only)") \
3406 \
3407 product(intx, UnguardOnExecutionViolation, 0, \
3408 "Unguard page and retry on no-execute fault (Win32 only)" \
3409 "0=off, 1=conservative, 2=aggressive") \
3410 \
3411 /* Serviceability Support */ \
3412 \
3413 product(bool, ManagementServer, false, \
3414 "Create JMX Management Server") \
3415 \
3416 product(bool, DisableAttachMechanism, false, \
3417 "Disable mechanism that allows tools to attach to this VM") \
3418 \
3419 product(bool, StartAttachListener, false, \
3420 "Always start Attach Listener at VM startup") \
3421 \
3422 manageable(bool, PrintConcurrentLocks, false, \
3423 "Print java.util.concurrent locks in thread dump") \
3424 \
3425 /* Shared spaces */ \
3426 \
3427 product(bool, UseSharedSpaces, true, \
3428 "Use shared spaces in the permanent generation") \
3429 \
3430 product(bool, RequireSharedSpaces, false, \
3431 "Require shared spaces in the permanent generation") \
3432 \
3433 product(bool, ForceSharedSpaces, false, \
3434 "Require shared spaces in the permanent generation") \
3435 \
3436 product(bool, DumpSharedSpaces, false, \
3437 "Special mode: JVM reads a class list, loads classes, builds " \
3438 "shared spaces, and dumps the shared spaces to a file to be " \
3439 "used in future JVM runs.") \
3440 \
3441 product(bool, PrintSharedSpaces, false, \
3442 "Print usage of shared spaces") \
3443 \
3444 product(uintx, SharedDummyBlockSize, 512*M, \
3445 "Size of dummy block used to shift heap addresses (in bytes)") \
3446 \
3447 product(uintx, SharedReadWriteSize, 12*M, \
3448 "Size of read-write space in permanent generation (in bytes)") \
3449 \
3450 product(uintx, SharedReadOnlySize, 10*M, \
3451 "Size of read-only space in permanent generation (in bytes)") \
3452 \
3453 product(uintx, SharedMiscDataSize, 4*M, \
3454 "Size of the shared data area adjacent to the heap (in bytes)") \
3455 \
3456 product(uintx, SharedMiscCodeSize, 4*M, \
3457 "Size of the shared code area adjacent to the heap (in bytes)") \
3458 \
3459 diagnostic(bool, SharedOptimizeColdStart, true, \
3460 "At dump time, order shared objects to achieve better " \
3461 "cold startup time.") \
3462 \
3463 develop(intx, SharedOptimizeColdStartPolicy, 2, \
3464 "Reordering policy for SharedOptimizeColdStart " \
3465 "0=favor classload-time locality, 1=balanced, " \
3466 "2=favor runtime locality") \
3467 \
3468 diagnostic(bool, SharedSkipVerify, false, \
3469 "Skip assert() and verify() which page-in unwanted shared " \
3470 "objects. ") \
3471 \
3472 product(bool, AnonymousClasses, false, \
3473 "support sun.misc.Unsafe.defineAnonymousClass") \
3474 \
3475 experimental(bool, EnableMethodHandles, false, \
3476 "support method handles (true by default under JSR 292)") \
3477 \
3478 diagnostic(intx, MethodHandlePushLimit, 3, \
3479 "number of additional stack slots a method handle may push") \
3480 \
3481 develop(bool, TraceMethodHandles, false, \
3482 "trace internal method handle operations") \
3483 \
3484 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
3485 "perform extra checks when constructing method handles") \
3486 \
3487 diagnostic(bool, OptimizeMethodHandles, true, \
3488 "when constructing method handles, try to improve them") \
3489 \
3490 experimental(bool, TrustFinalNonStaticFields, false, \
3491 "trust final non-static declarations for constant folding") \
3492 \
3493 experimental(bool, EnableInvokeDynamic, false, \
3494 "recognize the invokedynamic instruction") \
3495 \
3496 develop(bool, TraceInvokeDynamic, false, \
3497 "trace internal invoke dynamic operations") \
3498 \
3499 product(bool, TaggedStackInterpreter, false, \
3500 "Insert tags in interpreter execution stack for oopmap generaion")\
3501 \
3502 diagnostic(bool, PauseAtStartup, false, \
3503 "Causes the VM to pause at startup time and wait for the pause " \
3504 "file to be removed (default: ./vm.paused.<pid>)") \
3505 \
3506 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3507 "The file to create and for whose removal to await when pausing " \
3508 "at startup. (default: ./vm.paused.<pid>)") \
3509 \
3510 product(bool, ExtendedDTraceProbes, false, \
3511 "Enable performance-impacting dtrace probes") \
3512 \
3513 product(bool, DTraceMethodProbes, false, \
3514 "Enable dtrace probes for method-entry and method-exit") \
3515 \
3516 product(bool, DTraceAllocProbes, false, \
3517 "Enable dtrace probes for object allocation") \
3518 \
3519 product(bool, DTraceMonitorProbes, false, \
3520 "Enable dtrace probes for monitor events") \
3521 \
3522 product(bool, RelaxAccessControlCheck, false, \
3523 "Relax the access control checks in the verifier") \
3524 \
3525 diagnostic(bool, PrintDTraceDOF, false, \
3526 "Print the DTrace DOF passed to the system for JSDT probes") \
3527 \
3528 product(bool, UseVMInterruptibleIO, false, \
3529 "(Unstable, Solaris-specific) Thread interrupt before or with " \
3530 "EINTR for I/O operations results in OS_INTRPT. The default value"\
3531 " of this flag is true for JDK 6 and earliers")
3532
3533
3534 /*
3535 * Macros for factoring of globals
3536 */
3537
3538 // Interface macros
3539 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3540 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
3541 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3542 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3543 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3544 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3545 #ifdef PRODUCT
3546 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value;
3547 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name;
3548 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)
3549 #else
3550 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
3551 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
3552 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3553 #endif
3554 // Special LP64 flags, product only needed for now.
3555 #ifdef _LP64
3556 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3557 #else
3558 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3559 #endif // _LP64
3560
3561 // Implementation macros
3562 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
3563 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
3564 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
3565 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3566 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
3567 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
3568 #ifdef PRODUCT
3569 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */
3570 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */
3571 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
3572 #else
3573 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
3574 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
3575 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
3576 #endif
3577 #ifdef _LP64
3578 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3579 #else
3580 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3581 #endif // _LP64
3582
3583 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)
3584
3585 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)