1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
26 #define SHARE_VM_RUNTIME_GLOBALS_HPP
27
28 #include "gc/shared/gc_globals.hpp"
29 #include "utilities/align.hpp"
30 #include "utilities/globalDefinitions.hpp"
31 #include "utilities/macros.hpp"
32
33 #include <float.h> // for DBL_MAX
34
35 // The larger HeapWordSize for 64bit requires larger heaps
36 // for the same application running in 64bit. See bug 4967770.
37 // The minimum alignment to a heap word size is done. Other
38 // parts of the memory system may require additional alignment
39 // and are responsible for those alignments.
40 #ifdef _LP64
41 #define ScaleForWordSize(x) align_down_((x) * 13 / 10, HeapWordSize)
42 #else
43 #define ScaleForWordSize(x) (x)
44 #endif
45
46 // use this for flags that are true per default in the tiered build
47 // but false in non-tiered builds, and vice versa
48 #ifdef TIERED
49 #define trueInTiered true
50 #define falseInTiered false
51 #else
52 #define trueInTiered false
53 #define falseInTiered true
54 #endif
55
56 #include CPU_HEADER(globals)
57 #include OS_HEADER(globals)
58 #include OS_CPU_HEADER(globals)
59 #ifdef COMPILER1
60 #include CPU_HEADER(c1_globals)
61 #include OS_HEADER(c1_globals)
62 #endif
63 #ifdef COMPILER2
64 #include CPU_HEADER(c2_globals)
65 #include OS_HEADER(c2_globals)
66 #endif
67
68 #if !defined(COMPILER1) && !defined(COMPILER2) && !INCLUDE_JVMCI
69 define_pd_global(bool, BackgroundCompilation, false);
70 define_pd_global(bool, UseTLAB, false);
71 define_pd_global(bool, CICompileOSR, false);
72 define_pd_global(bool, UseTypeProfile, false);
73 define_pd_global(bool, UseOnStackReplacement, false);
74 define_pd_global(bool, InlineIntrinsics, false);
75 define_pd_global(bool, PreferInterpreterNativeStubs, true);
76 define_pd_global(bool, ProfileInterpreter, false);
77 define_pd_global(bool, ProfileTraps, false);
78 define_pd_global(bool, TieredCompilation, false);
79
80 define_pd_global(intx, CompileThreshold, 0);
81
82 define_pd_global(intx, OnStackReplacePercentage, 0);
83 define_pd_global(bool, ResizeTLAB, false);
84 define_pd_global(intx, FreqInlineSize, 0);
85 define_pd_global(size_t, NewSizeThreadIncrease, 4*K);
86 define_pd_global(bool, InlineClassNatives, true);
87 define_pd_global(bool, InlineUnsafeOps, true);
88 define_pd_global(uintx, InitialCodeCacheSize, 160*K);
89 define_pd_global(uintx, ReservedCodeCacheSize, 32*M);
90 define_pd_global(uintx, NonProfiledCodeHeapSize, 0);
91 define_pd_global(uintx, ProfiledCodeHeapSize, 0);
92 define_pd_global(uintx, NonNMethodCodeHeapSize, 32*M);
93
94 define_pd_global(uintx, CodeCacheExpansionSize, 32*K);
95 define_pd_global(uintx, CodeCacheMinBlockLength, 1);
96 define_pd_global(uintx, CodeCacheMinimumUseSpace, 200*K);
97 define_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M));
98 define_pd_global(bool, NeverActAsServerClassMachine, true);
99 define_pd_global(uint64_t,MaxRAM, 1ULL*G);
100 #define CI_COMPILER_COUNT 0
101 #else
102
103 #if COMPILER2_OR_JVMCI
104 #define CI_COMPILER_COUNT 2
105 #else
106 #define CI_COMPILER_COUNT 1
107 #endif // COMPILER2_OR_JVMCI
108
109 #endif // no compilers
110
111 // use this for flags that are true by default in the debug version but
112 // false in the optimized version, and vice versa
113 #ifdef ASSERT
114 #define trueInDebug true
115 #define falseInDebug false
116 #else
117 #define trueInDebug false
118 #define falseInDebug true
119 #endif
120
121 // use this for flags that are true per default in the product build
122 // but false in development builds, and vice versa
123 #ifdef PRODUCT
124 #define trueInProduct true
125 #define falseInProduct false
126 #else
127 #define trueInProduct false
128 #define falseInProduct true
129 #endif
130
131 // develop flags are settable / visible only during development and are constant in the PRODUCT version
132 // product flags are always settable / visible
133 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
134
135 // A flag must be declared with one of the following types:
136 // bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t.
137 // The type "ccstr" is an alias for "const char*" and is used
138 // only in this file, because the macrology requires single-token type names.
139
140 // Note: Diagnostic options not meant for VM tuning or for product modes.
141 // They are to be used for VM quality assurance or field diagnosis
142 // of VM bugs. They are hidden so that users will not be encouraged to
143 // try them as if they were VM ordinary execution options. However, they
144 // are available in the product version of the VM. Under instruction
145 // from support engineers, VM customers can turn them on to collect
146 // diagnostic information about VM problems. To use a VM diagnostic
147 // option, you must first specify +UnlockDiagnosticVMOptions.
148 // (This master switch also affects the behavior of -Xprintflags.)
149 //
150 // experimental flags are in support of features that are not
151 // part of the officially supported product, but are available
152 // for experimenting with. They could, for example, be performance
153 // features that may not have undergone full or rigorous QA, but which may
154 // help performance in some cases and released for experimentation
155 // by the community of users and developers. This flag also allows one to
156 // be able to build a fully supported product that nonetheless also
157 // ships with some unsupported, lightly tested, experimental features.
158 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
159 // UnlockExperimentalVMOptions flag, which allows the control and
160 // modification of the experimental flags.
161 //
162 // Nota bene: neither diagnostic nor experimental options should be used casually,
163 // and they are not supported on production loads, except under explicit
164 // direction from support engineers.
165 //
166 // manageable flags are writeable external product flags.
167 // They are dynamically writeable through the JDK management interface
168 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
169 // These flags are external exported interface (see CCC). The list of
170 // manageable flags can be queried programmatically through the management
171 // interface.
172 //
173 // A flag can be made as "manageable" only if
174 // - the flag is defined in a CCC as an external exported interface.
175 // - the VM implementation supports dynamic setting of the flag.
176 // This implies that the VM must *always* query the flag variable
177 // and not reuse state related to the flag state at any given time.
178 // - you want the flag to be queried programmatically by the customers.
179 //
180 // product_rw flags are writeable internal product flags.
181 // They are like "manageable" flags but for internal/private use.
182 // The list of product_rw flags are internal/private flags which
183 // may be changed/removed in a future release. It can be set
184 // through the management interface to get/set value
185 // when the name of flag is supplied.
186 //
187 // A flag can be made as "product_rw" only if
188 // - the VM implementation supports dynamic setting of the flag.
189 // This implies that the VM must *always* query the flag variable
190 // and not reuse state related to the flag state at any given time.
191 //
192 // Note that when there is a need to support develop flags to be writeable,
193 // it can be done in the same way as product_rw.
194 //
195 // range is a macro that will expand to min and max arguments for range
196 // checking code if provided - see jvmFlagRangeList.hpp
197 //
198 // constraint is a macro that will expand to custom function call
199 // for constraint checking if provided - see jvmFlagConstraintList.hpp
200 //
201 // writeable is a macro that controls if and how the value can change during the runtime
202 //
203 // writeable(Always) is optional and allows the flag to have its value changed
204 // without any limitations at any time
205 //
206 // writeable(Once) flag value's can be only set once during the lifetime of VM
207 //
208 // writeable(CommandLineOnly) flag value's can be only set from command line
209 // (multiple times allowed)
210 //
211
212
213 #define RUNTIME_FLAGS(develop, \
214 develop_pd, \
215 product, \
216 product_pd, \
217 diagnostic, \
218 diagnostic_pd, \
219 experimental, \
220 notproduct, \
221 manageable, \
222 product_rw, \
223 lp64_product, \
224 range, \
225 constraint, \
226 writeable) \
227 \
228 lp64_product(bool, UseCompressedOops, false, \
229 "Use 32-bit object references in 64-bit VM. " \
230 "lp64_product means flag is always constant in 32 bit VM") \
231 \
232 lp64_product(bool, UseCompressedClassPointers, false, \
233 "Use 32-bit class pointers in 64-bit VM. " \
234 "lp64_product means flag is always constant in 32 bit VM") \
235 \
236 notproduct(bool, CheckCompressedOops, true, \
237 "Generate checks in encoding/decoding code in debug VM") \
238 \
239 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \
240 "Heap allocation steps through preferred address regions to find" \
241 " where it can allocate the heap. Number of steps to take per " \
242 "region.") \
243 range(1, max_uintx) \
244 \
245 lp64_product(intx, ObjectAlignmentInBytes, 8, \
246 "Default object alignment in bytes, 8 is minimum") \
247 range(8, 256) \
248 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \
249 \
250 product(bool, AssumeMP, true, \
251 "(Deprecated) Instruct the VM to assume multiple processors are available")\
252 \
253 /* UseMembar is theoretically a temp flag used for memory barrier */ \
254 /* removal testing. It was supposed to be removed before FCS but has */ \
255 /* been re-added (see 6401008) */ \
256 product_pd(bool, UseMembar, \
257 "(Unstable) Issues membars on thread state transitions") \
258 \
259 develop(bool, CleanChunkPoolAsync, true, \
260 "Clean the chunk pool asynchronously") \
261 \
262 product_pd(bool, ThreadLocalHandshakes, \
263 "Use thread-local polls instead of global poll for safepoints.") \
264 constraint(ThreadLocalHandshakesConstraintFunc,AfterErgo) \
265 \
266 diagnostic(uint, HandshakeTimeout, 0, \
267 "If nonzero set a timeout in milliseconds for handshakes") \
268 \
269 experimental(bool, AlwaysSafeConstructors, false, \
270 "Force safe construction, as if all fields are final.") \
271 \
272 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
273 "Enable normal processing of flags relating to field diagnostics")\
274 \
275 experimental(bool, UnlockExperimentalVMOptions, false, \
276 "Enable normal processing of flags relating to experimental " \
277 "features") \
278 \
279 product(bool, JavaMonitorsInStackTrace, true, \
280 "Print information about Java monitor locks when the stacks are" \
281 "dumped") \
282 \
283 product_pd(bool, UseLargePages, \
284 "Use large page memory") \
285 \
286 product_pd(bool, UseLargePagesIndividualAllocation, \
287 "Allocate large pages individually for better affinity") \
288 \
289 develop(bool, LargePagesIndividualAllocationInjectError, false, \
290 "Fail large pages individual allocation") \
291 \
292 product(bool, UseLargePagesInMetaspace, false, \
293 "Use large page memory in metaspace. " \
294 "Only used if UseLargePages is enabled.") \
295 \
296 product(bool, UseNUMA, false, \
297 "Use NUMA if available") \
298 \
299 product(bool, UseNUMAInterleaving, false, \
300 "Interleave memory across NUMA nodes if available") \
301 \
302 product(size_t, NUMAInterleaveGranularity, 2*M, \
303 "Granularity to use for NUMA interleaving on Windows OS") \
304 range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G)) \
305 \
306 product(bool, ForceNUMA, false, \
307 "Force NUMA optimizations on single-node/UMA systems") \
308 \
309 product(uintx, NUMAChunkResizeWeight, 20, \
310 "Percentage (0-100) used to weight the current sample when " \
311 "computing exponentially decaying average for " \
312 "AdaptiveNUMAChunkSizing") \
313 range(0, 100) \
314 \
315 product(size_t, NUMASpaceResizeRate, 1*G, \
316 "Do not reallocate more than this amount per collection") \
317 range(0, max_uintx) \
318 \
319 product(bool, UseAdaptiveNUMAChunkSizing, true, \
320 "Enable adaptive chunk sizing for NUMA") \
321 \
322 product(bool, NUMAStats, false, \
323 "Print NUMA stats in detailed heap information") \
324 \
325 product(uintx, NUMAPageScanRate, 256, \
326 "Maximum number of pages to include in the page scan procedure") \
327 range(0, max_uintx) \
328 \
329 product_pd(bool, NeedsDeoptSuspend, \
330 "True for register window machines (sparc/ia64)") \
331 \
332 product(intx, UseSSE, 99, \
333 "Highest supported SSE instructions set on x86/x64") \
334 range(0, 99) \
335 \
336 product(bool, UseAES, false, \
337 "Control whether AES instructions are used when available") \
338 \
339 product(bool, UseFMA, false, \
340 "Control whether FMA instructions are used when available") \
341 \
342 product(bool, UseSHA, false, \
343 "Control whether SHA instructions are used when available") \
344 \
345 diagnostic(bool, UseGHASHIntrinsics, false, \
346 "Use intrinsics for GHASH versions of crypto") \
347 \
348 product(bool, UseBASE64Intrinsics, false, \
349 "Use intrinsics for java.util.Base64") \
350 \
351 product(size_t, LargePageSizeInBytes, 0, \
352 "Large page size (0 to let VM choose the page size)") \
353 range(0, max_uintx) \
354 \
355 product(size_t, LargePageHeapSizeThreshold, 128*M, \
356 "Use large pages if maximum heap is at least this big") \
357 range(0, max_uintx) \
358 \
359 product(bool, ForceTimeHighResolution, false, \
360 "Using high time resolution (for Win32 only)") \
361 \
362 develop(bool, TracePcPatching, false, \
363 "Trace usage of frame::patch_pc") \
364 \
365 develop(bool, TraceRelocator, false, \
366 "Trace the bytecode relocator") \
367 \
368 develop(bool, TraceLongCompiles, false, \
369 "Print out every time compilation is longer than " \
370 "a given threshold") \
371 \
372 develop(bool, SafepointALot, false, \
373 "Generate a lot of safepoints. This works with " \
374 "GuaranteedSafepointInterval") \
375 \
376 product_pd(bool, BackgroundCompilation, \
377 "A thread requesting compilation is not blocked during " \
378 "compilation") \
379 \
380 product(bool, PrintVMQWaitTime, false, \
381 "Print out the waiting time in VM operation queue") \
382 \
383 product(bool, MethodFlushing, true, \
384 "Reclamation of zombie and not-entrant methods") \
385 \
386 develop(bool, VerifyStack, false, \
387 "Verify stack of each thread when it is entering a runtime call") \
388 \
389 diagnostic(bool, ForceUnreachable, false, \
390 "Make all non code cache addresses to be unreachable by " \
391 "forcing use of 64bit literal fixups") \
392 \
393 notproduct(bool, StressDerivedPointers, false, \
394 "Force scavenge when a derived pointer is detected on stack " \
395 "after rtm call") \
396 \
397 develop(bool, TraceDerivedPointers, false, \
398 "Trace traversal of derived pointers on stack") \
399 \
400 notproduct(bool, TraceCodeBlobStacks, false, \
401 "Trace stack-walk of codeblobs") \
402 \
403 product(bool, PrintJNIResolving, false, \
404 "Used to implement -v:jni") \
405 \
406 notproduct(bool, PrintRewrites, false, \
407 "Print methods that are being rewritten") \
408 \
409 product(bool, UseInlineCaches, true, \
410 "Use Inline Caches for virtual calls ") \
411 \
412 diagnostic(bool, InlineArrayCopy, true, \
413 "Inline arraycopy native that is known to be part of " \
414 "base library DLL") \
415 \
416 diagnostic(bool, InlineObjectHash, true, \
417 "Inline Object::hashCode() native that is known to be part " \
418 "of base library DLL") \
419 \
420 diagnostic(bool, InlineNatives, true, \
421 "Inline natives that are known to be part of base library DLL") \
422 \
423 diagnostic(bool, InlineMathNatives, true, \
424 "Inline SinD, CosD, etc.") \
425 \
426 diagnostic(bool, InlineClassNatives, true, \
427 "Inline Class.isInstance, etc") \
428 \
429 diagnostic(bool, InlineThreadNatives, true, \
430 "Inline Thread.currentThread, etc") \
431 \
432 diagnostic(bool, InlineUnsafeOps, true, \
433 "Inline memory ops (native methods) from Unsafe") \
434 \
435 product(bool, CriticalJNINatives, true, \
436 "Check for critical JNI entry points") \
437 \
438 notproduct(bool, StressCriticalJNINatives, false, \
439 "Exercise register saving code in critical natives") \
440 \
441 diagnostic(bool, UseAESIntrinsics, false, \
442 "Use intrinsics for AES versions of crypto") \
443 \
444 diagnostic(bool, UseAESCTRIntrinsics, false, \
445 "Use intrinsics for the paralleled version of AES/CTR crypto") \
446 \
447 diagnostic(bool, UseSHA1Intrinsics, false, \
448 "Use intrinsics for SHA-1 crypto hash function. " \
449 "Requires that UseSHA is enabled.") \
450 \
451 diagnostic(bool, UseSHA256Intrinsics, false, \
452 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \
453 "Requires that UseSHA is enabled.") \
454 \
455 diagnostic(bool, UseSHA512Intrinsics, false, \
456 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \
457 "Requires that UseSHA is enabled.") \
458 \
459 diagnostic(bool, UseCRC32Intrinsics, false, \
460 "use intrinsics for java.util.zip.CRC32") \
461 \
462 diagnostic(bool, UseCRC32CIntrinsics, false, \
463 "use intrinsics for java.util.zip.CRC32C") \
464 \
465 diagnostic(bool, UseAdler32Intrinsics, false, \
466 "use intrinsics for java.util.zip.Adler32") \
467 \
468 diagnostic(bool, UseVectorizedMismatchIntrinsic, false, \
469 "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \
470 \
471 diagnostic(ccstrlist, DisableIntrinsic, "", \
472 "do not expand intrinsics whose (internal) names appear here") \
473 \
474 develop(bool, TraceCallFixup, false, \
475 "Trace all call fixups") \
476 \
477 develop(bool, DeoptimizeALot, false, \
478 "Deoptimize at every exit from the runtime system") \
479 \
480 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
481 "A comma separated list of bcis to deoptimize at") \
482 \
483 product(bool, DeoptimizeRandom, false, \
484 "Deoptimize random frames on random exit from the runtime system")\
485 \
486 notproduct(bool, ZombieALot, false, \
487 "Create zombies (non-entrant) at exit from the runtime system") \
488 \
489 notproduct(bool, WalkStackALot, false, \
490 "Trace stack (no print) at every exit from the runtime system") \
491 \
492 product(bool, Debugging, false, \
493 "Set when executing debug methods in debug.cpp " \
494 "(to prevent triggering assertions)") \
495 \
496 notproduct(bool, StrictSafepointChecks, trueInDebug, \
497 "Enable strict checks that safepoints cannot happen for threads " \
498 "that use NoSafepointVerifier") \
499 \
500 notproduct(bool, VerifyLastFrame, false, \
501 "Verify oops on last frame on entry to VM") \
502 \
503 product(bool, FailOverToOldVerifier, true, \
504 "Fail over to old verifier when split verifier fails") \
505 \
506 product(bool, SafepointTimeout, false, \
507 "Time out and warn or fail after SafepointTimeoutDelay " \
508 "milliseconds if failed to reach safepoint") \
509 \
510 develop(bool, DieOnSafepointTimeout, false, \
511 "Die upon failure to reach safepoint (see SafepointTimeout)") \
512 \
513 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
514 /* typically, at most a few retries are needed */ \
515 product(intx, SuspendRetryCount, 50, \
516 "Maximum retry count for an external suspend request") \
517 range(0, max_intx) \
518 \
519 product(intx, SuspendRetryDelay, 5, \
520 "Milliseconds to delay per retry (* current_retry_count)") \
521 range(0, max_intx) \
522 \
523 product(bool, AssertOnSuspendWaitFailure, false, \
524 "Assert/Guarantee on external suspend wait failure") \
525 \
526 product(bool, TraceSuspendWaitFailures, false, \
527 "Trace external suspend wait failures") \
528 \
529 product(bool, MaxFDLimit, true, \
530 "Bump the number of file descriptors to maximum in Solaris") \
531 \
532 diagnostic(bool, LogEvents, true, \
533 "Enable the various ring buffer event logs") \
534 \
535 diagnostic(uintx, LogEventsBufferEntries, 10, \
536 "Number of ring buffer event logs") \
537 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \
538 \
539 product(bool, BytecodeVerificationRemote, true, \
540 "Enable the Java bytecode verifier for remote classes") \
541 \
542 product(bool, BytecodeVerificationLocal, false, \
543 "Enable the Java bytecode verifier for local classes") \
544 \
545 develop(bool, ForceFloatExceptions, trueInDebug, \
546 "Force exceptions on FP stack under/overflow") \
547 \
548 develop(bool, VerifyStackAtCalls, false, \
549 "Verify that the stack pointer is unchanged after calls") \
550 \
551 develop(bool, TraceJavaAssertions, false, \
552 "Trace java language assertions") \
553 \
554 notproduct(bool, VerifyCodeCache, false, \
555 "Verify code cache on memory allocation/deallocation") \
556 \
557 develop(bool, UseMallocOnly, false, \
558 "Use only malloc/free for allocation (no resource area/arena)") \
559 \
560 develop(bool, PrintMallocStatistics, false, \
561 "Print malloc/free statistics") \
562 \
563 develop(bool, ZapResourceArea, trueInDebug, \
564 "Zap freed resource/arena space with 0xABABABAB") \
565 \
566 notproduct(bool, ZapVMHandleArea, trueInDebug, \
567 "Zap freed VM handle space with 0xBCBCBCBC") \
568 \
569 notproduct(bool, ZapStackSegments, trueInDebug, \
570 "Zap allocated/freed stack segments with 0xFADFADED") \
571 \
572 develop(bool, ZapUnusedHeapArea, trueInDebug, \
573 "Zap unused heap space with 0xBAADBABE") \
574 \
575 develop(bool, CheckZapUnusedHeapArea, false, \
576 "Check zapping of unused heap space") \
577 \
578 develop(bool, ZapFillerObjects, trueInDebug, \
579 "Zap filler objects with 0xDEAFBABE") \
580 \
581 develop(bool, PrintVMMessages, true, \
582 "Print VM messages on console") \
583 \
584 notproduct(uintx, ErrorHandlerTest, 0, \
585 "If > 0, provokes an error after VM initialization; the value " \
586 "determines which error to provoke. See test_error_handler() " \
587 "in vmError.cpp.") \
588 \
589 notproduct(uintx, TestCrashInErrorHandler, 0, \
590 "If > 0, provokes an error inside VM error handler (a secondary " \
591 "crash). see test_error_handler() in vmError.cpp") \
592 \
593 notproduct(bool, TestSafeFetchInErrorHandler, false, \
594 "If true, tests SafeFetch inside error handler.") \
595 \
596 notproduct(bool, TestUnresponsiveErrorHandler, false, \
597 "If true, simulates an unresponsive error handler.") \
598 \
599 develop(bool, Verbose, false, \
600 "Print additional debugging information from other modes") \
601 \
602 develop(bool, PrintMiscellaneous, false, \
603 "Print uncategorized debugging information (requires +Verbose)") \
604 \
605 develop(bool, WizardMode, false, \
606 "Print much more debugging information") \
607 \
608 product(bool, ShowMessageBoxOnError, false, \
609 "Keep process alive on VM fatal error") \
610 \
611 product(bool, CreateCoredumpOnCrash, true, \
612 "Create core/mini dump on VM fatal error") \
613 \
614 product(uint64_t, ErrorLogTimeout, 2 * 60, \
615 "Timeout, in seconds, to limit the time spent on writing an " \
616 "error log in case of a crash.") \
617 range(0, (uint64_t)max_jlong/1000) \
618 \
619 product_pd(bool, UseOSErrorReporting, \
620 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
621 \
622 product(bool, SuppressFatalErrorMessage, false, \
623 "Report NO fatal error message (avoid deadlock)") \
624 \
625 product(ccstrlist, OnError, "", \
626 "Run user-defined commands on fatal error; see VMError.cpp " \
627 "for examples") \
628 \
629 product(ccstrlist, OnOutOfMemoryError, "", \
630 "Run user-defined commands on first java.lang.OutOfMemoryError") \
631 \
632 manageable(bool, HeapDumpBeforeFullGC, false, \
633 "Dump heap to file before any major stop-the-world GC") \
634 \
635 manageable(bool, HeapDumpAfterFullGC, false, \
636 "Dump heap to file after any major stop-the-world GC") \
637 \
638 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
639 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
640 \
641 manageable(ccstr, HeapDumpPath, NULL, \
642 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \
643 "directory) of the dump file (defaults to java_pid<pid>.hprof " \
644 "in the working directory)") \
645 \
646 develop(bool, BreakAtWarning, false, \
647 "Execute breakpoint upon encountering VM warning") \
648 \
649 develop(bool, UseFakeTimers, false, \
650 "Tell whether the VM should use system time or a fake timer") \
651 \
652 product(ccstr, NativeMemoryTracking, "off", \
653 "Native memory tracking options") \
654 \
655 diagnostic(bool, PrintNMTStatistics, false, \
656 "Print native memory tracking summary data if it is on") \
657 \
658 diagnostic(bool, LogCompilation, false, \
659 "Log compilation activity in detail to LogFile") \
660 \
661 product(bool, PrintCompilation, false, \
662 "Print compilations") \
663 \
664 product(bool, PrintExtendedThreadInfo, false, \
665 "Print more information in thread dump") \
666 \
667 diagnostic(bool, TraceNMethodInstalls, false, \
668 "Trace nmethod installation") \
669 \
670 diagnostic(intx, ScavengeRootsInCode, 2, \
671 "0: do not allow scavengable oops in the code cache; " \
672 "1: allow scavenging from the code cache; " \
673 "2: emit as many constants as the compiler can see") \
674 range(0, 2) \
675 \
676 product(bool, AlwaysRestoreFPU, false, \
677 "Restore the FPU control word after every JNI call (expensive)") \
678 \
679 diagnostic(bool, PrintCompilation2, false, \
680 "Print additional statistics per compilation") \
681 \
682 diagnostic(bool, PrintAdapterHandlers, false, \
683 "Print code generated for i2c/c2i adapters") \
684 \
685 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \
686 "Verify that i2c/c2i adapters are called properly") \
687 \
688 develop(bool, VerifyAdapterSharing, false, \
689 "Verify that the code for shared adapters is the equivalent") \
690 \
691 diagnostic(bool, PrintAssembly, false, \
692 "Print assembly code (using external disassembler.so)") \
693 \
694 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
695 "Print options string passed to disassembler.so") \
696 \
697 notproduct(bool, PrintNMethodStatistics, false, \
698 "Print a summary statistic for the generated nmethods") \
699 \
700 diagnostic(bool, PrintNMethods, false, \
701 "Print assembly code for nmethods when generated") \
702 \
703 diagnostic(bool, PrintNativeNMethods, false, \
704 "Print assembly code for native nmethods when generated") \
705 \
706 develop(bool, PrintDebugInfo, false, \
707 "Print debug information for all nmethods when generated") \
708 \
709 develop(bool, PrintRelocations, false, \
710 "Print relocation information for all nmethods when generated") \
711 \
712 develop(bool, PrintDependencies, false, \
713 "Print dependency information for all nmethods when generated") \
714 \
715 develop(bool, PrintExceptionHandlers, false, \
716 "Print exception handler tables for all nmethods when generated") \
717 \
718 develop(bool, StressCompiledExceptionHandlers, false, \
719 "Exercise compiled exception handlers") \
720 \
721 develop(bool, InterceptOSException, false, \
722 "Start debugger when an implicit OS (e.g. NULL) " \
723 "exception happens") \
724 \
725 product(bool, PrintCodeCache, false, \
726 "Print the code cache memory usage when exiting") \
727 \
728 develop(bool, PrintCodeCache2, false, \
729 "Print detailed usage information on the code cache when exiting")\
730 \
731 product(bool, PrintCodeCacheOnCompilation, false, \
732 "Print the code cache memory usage each time a method is " \
733 "compiled") \
734 \
735 diagnostic(bool, PrintStubCode, false, \
736 "Print generated stub code") \
737 \
738 product(bool, StackTraceInThrowable, true, \
739 "Collect backtrace in throwable when exception happens") \
740 \
741 product(bool, OmitStackTraceInFastThrow, true, \
742 "Omit backtraces for some 'hot' exceptions in optimized code") \
743 \
744 product(bool, ProfilerPrintByteCodeStatistics, false, \
745 "Print bytecode statistics when dumping profiler output") \
746 \
747 product(bool, ProfilerRecordPC, false, \
748 "Collect ticks for each 16 byte interval of compiled code") \
749 \
750 product(bool, ProfileVM, false, \
751 "Profile ticks that fall within VM (either in the VM Thread " \
752 "or VM code called through stubs)") \
753 \
754 product(bool, ProfileIntervals, false, \
755 "Print profiles for each interval (see ProfileIntervalsTicks)") \
756 \
757 notproduct(bool, ProfilerCheckIntervals, false, \
758 "Collect and print information on spacing of profiler ticks") \
759 \
760 product(bool, PrintWarnings, true, \
761 "Print JVM warnings to output stream") \
762 \
763 notproduct(uintx, WarnOnStalledSpinLock, 0, \
764 "Print warnings for stalled SpinLocks") \
765 \
766 product(bool, RegisterFinalizersAtInit, true, \
767 "Register finalizable objects at end of Object.<init> or " \
768 "after allocation") \
769 \
770 develop(bool, RegisterReferences, true, \
771 "Tell whether the VM should register soft/weak/final/phantom " \
772 "references") \
773 \
774 develop(bool, IgnoreRewrites, false, \
775 "Suppress rewrites of bytecodes in the oopmap generator. " \
776 "This is unsafe!") \
777 \
778 develop(bool, PrintCodeCacheExtension, false, \
779 "Print extension of code cache") \
780 \
781 develop(bool, UsePrivilegedStack, true, \
782 "Enable the security JVM functions") \
783 \
784 develop(bool, ProtectionDomainVerification, true, \
785 "Verify protection domain before resolution in system dictionary")\
786 \
787 product(bool, ClassUnloading, true, \
788 "Do unloading of classes") \
789 \
790 product(bool, ClassUnloadingWithConcurrentMark, true, \
791 "Do unloading of classes with a concurrent marking cycle") \
792 \
793 develop(bool, DisableStartThread, false, \
794 "Disable starting of additional Java threads " \
795 "(for debugging only)") \
796 \
797 develop(bool, MemProfiling, false, \
798 "Write memory usage profiling to log file") \
799 \
800 notproduct(bool, PrintSystemDictionaryAtExit, false, \
801 "Print the system dictionary at exit") \
802 \
803 diagnostic(bool, DynamicallyResizeSystemDictionaries, true, \
804 "Dynamically resize system dictionaries as needed") \
805 \
806 product(bool, AlwaysLockClassLoader, false, \
807 "Require the VM to acquire the class loader lock before calling " \
808 "loadClass() even for class loaders registering " \
809 "as parallel capable") \
810 \
811 product(bool, AllowParallelDefineClass, false, \
812 "Allow parallel defineClass requests for class loaders " \
813 "registering as parallel capable") \
814 \
815 product_pd(bool, DontYieldALot, \
816 "Throw away obvious excess yield calls") \
817 \
818 develop(bool, UseDetachedThreads, true, \
819 "Use detached threads that are recycled upon termination " \
820 "(for Solaris only)") \
821 \
822 experimental(bool, DisablePrimordialThreadGuardPages, false, \
823 "Disable the use of stack guard pages if the JVM is loaded " \
824 "on the primordial process thread") \
825 \
826 product(bool, UseLWPSynchronization, true, \
827 "Use LWP-based instead of libthread-based synchronization " \
828 "(SPARC only)") \
829 \
830 experimental(ccstr, SyncKnobs, NULL, \
831 "(Unstable) Various monitor synchronization tunables") \
832 \
833 product(intx, MonitorBound, 0, "Bound Monitor population") \
834 range(0, max_jint) \
835 \
836 product(bool, MonitorInUseLists, true, "Track Monitors for Deflation") \
837 \
838 experimental(intx, MonitorUsedDeflationThreshold, 90, \
839 "Percentage of used monitors before triggering cleanup " \
840 "safepoint which deflates monitors (0 is off). " \
841 "The check is performed on GuaranteedSafepointInterval.") \
842 range(0, 100) \
843 \
844 experimental(intx, hashCode, 5, \
845 "(Unstable) select hashCode generation algorithm") \
846 \
847 product(bool, FilterSpuriousWakeups, true, \
848 "When true prevents OS-level spurious, or premature, wakeups " \
849 "from Object.wait (Ignored for Windows)") \
850 \
851 develop(bool, UsePthreads, false, \
852 "Use pthread-based instead of libthread-based synchronization " \
853 "(SPARC only)") \
854 \
855 product(bool, ReduceSignalUsage, false, \
856 "Reduce the use of OS signals in Java and/or the VM") \
857 \
858 develop_pd(bool, ShareVtableStubs, \
859 "Share vtable stubs (smaller code but worse branch prediction") \
860 \
861 develop(bool, LoadLineNumberTables, true, \
862 "Tell whether the class file parser loads line number tables") \
863 \
864 develop(bool, LoadLocalVariableTables, true, \
865 "Tell whether the class file parser loads local variable tables") \
866 \
867 develop(bool, LoadLocalVariableTypeTables, true, \
868 "Tell whether the class file parser loads local variable type" \
869 "tables") \
870 \
871 product(bool, AllowUserSignalHandlers, false, \
872 "Do not complain if the application installs signal handlers " \
873 "(Solaris & Linux only)") \
874 \
875 product(bool, UseSignalChaining, true, \
876 "Use signal-chaining to invoke signal handlers installed " \
877 "by the application (Solaris & Linux only)") \
878 \
879 product(bool, AllowJNIEnvProxy, false, \
880 "Allow JNIEnv proxies for jdbx") \
881 \
882 product(bool, RestoreMXCSROnJNICalls, false, \
883 "Restore MXCSR when returning from JNI calls") \
884 \
885 product(bool, CheckJNICalls, false, \
886 "Verify all arguments to JNI calls") \
887 \
888 product(bool, UseFastJNIAccessors, true, \
889 "Use optimized versions of Get<Primitive>Field") \
890 \
891 product(intx, MaxJNILocalCapacity, 65536, \
892 "Maximum allowable local JNI handle capacity to " \
893 "EnsureLocalCapacity() and PushLocalFrame(), " \
894 "where <= 0 is unlimited, default: 65536") \
895 range(min_intx, max_intx) \
896 \
897 product(bool, EagerXrunInit, false, \
898 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
899 "but not all -Xrun libraries may support the state of the VM " \
900 "at this time") \
901 \
902 product(bool, PreserveAllAnnotations, false, \
903 "Preserve RuntimeInvisibleAnnotations as well " \
904 "as RuntimeVisibleAnnotations") \
905 \
906 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
907 "Number of OutOfMemoryErrors preallocated with backtrace") \
908 \
909 product(bool, UseXMMForArrayCopy, false, \
910 "Use SSE2 MOVQ instruction for Arraycopy") \
911 \
912 product(intx, FieldsAllocationStyle, 1, \
913 "0 - type based with oops first, " \
914 "1 - with oops last, " \
915 "2 - oops in super and sub classes are together") \
916 range(0, 2) \
917 \
918 product(bool, CompactFields, true, \
919 "Allocate nonstatic fields in gaps between previous fields") \
920 \
921 notproduct(bool, PrintFieldLayout, false, \
922 "Print field layout for each class") \
923 \
924 /* Need to limit the extent of the padding to reasonable size. */\
925 /* 8K is well beyond the reasonable HW cache line size, even with */\
926 /* aggressive prefetching, while still leaving the room for segregating */\
927 /* among the distinct pages. */\
928 product(intx, ContendedPaddingWidth, 128, \
929 "How many bytes to pad the fields/classes marked @Contended with")\
930 range(0, 8192) \
931 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \
932 \
933 product(bool, EnableContended, true, \
934 "Enable @Contended annotation support") \
935 \
936 product(bool, RestrictContended, true, \
937 "Restrict @Contended to trusted classes") \
938 \
939 product(bool, UseBiasedLocking, true, \
940 "Enable biased locking in JVM") \
941 \
942 product(intx, BiasedLockingStartupDelay, 0, \
943 "Number of milliseconds to wait before enabling biased locking") \
944 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \
945 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \
946 \
947 diagnostic(bool, PrintBiasedLockingStatistics, false, \
948 "Print statistics of biased locking in JVM") \
949 \
950 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
951 "Threshold of number of revocations per type to try to " \
952 "rebias all objects in the heap of that type") \
953 range(0, max_intx) \
954 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \
955 \
956 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
957 "Threshold of number of revocations per type to permanently " \
958 "revoke biases of all objects in the heap of that type") \
959 range(0, max_intx) \
960 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \
961 \
962 product(intx, BiasedLockingDecayTime, 25000, \
963 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
964 "type after previous bulk rebias") \
965 range(500, max_intx) \
966 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \
967 \
968 product(bool, ExitOnOutOfMemoryError, false, \
969 "JVM exits on the first occurrence of an out-of-memory error") \
970 \
971 product(bool, CrashOnOutOfMemoryError, false, \
972 "JVM aborts, producing an error log and core/mini dump, on the " \
973 "first occurrence of an out-of-memory error") \
974 \
975 /* tracing */ \
976 \
977 develop(bool, StressRewriter, false, \
978 "Stress linktime bytecode rewriting") \
979 \
980 product(ccstr, TraceJVMTI, NULL, \
981 "Trace flags for JVMTI functions and events") \
982 \
983 /* This option can change an EMCP method into an obsolete method. */ \
984 /* This can affect tests that except specific methods to be EMCP. */ \
985 /* This option should be used with caution. */ \
986 product(bool, StressLdcRewrite, false, \
987 "Force ldc -> ldc_w rewrite during RedefineClasses") \
988 \
989 /* change to false by default sometime after Mustang */ \
990 product(bool, VerifyMergedCPBytecodes, true, \
991 "Verify bytecodes after RedefineClasses constant pool merging") \
992 \
993 develop(bool, TraceBytecodes, false, \
994 "Trace bytecode execution") \
995 \
996 develop(bool, TraceICs, false, \
997 "Trace inline cache changes") \
998 \
999 notproduct(bool, TraceInvocationCounterOverflow, false, \
1000 "Trace method invocation counter overflow") \
1001 \
1002 develop(bool, TraceInlineCacheClearing, false, \
1003 "Trace clearing of inline caches in nmethods") \
1004 \
1005 develop(bool, TraceDependencies, false, \
1006 "Trace dependencies") \
1007 \
1008 develop(bool, VerifyDependencies, trueInDebug, \
1009 "Exercise and verify the compilation dependency mechanism") \
1010 \
1011 develop(bool, TraceNewOopMapGeneration, false, \
1012 "Trace OopMapGeneration") \
1013 \
1014 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1015 "Trace OopMapGeneration: print detailed cell states") \
1016 \
1017 develop(bool, TimeOopMap, false, \
1018 "Time calls to GenerateOopMap::compute_map() in sum") \
1019 \
1020 develop(bool, TimeOopMap2, false, \
1021 "Time calls to GenerateOopMap::compute_map() individually") \
1022 \
1023 develop(bool, TraceOopMapRewrites, false, \
1024 "Trace rewriting of method oops during oop map generation") \
1025 \
1026 develop(bool, TraceICBuffer, false, \
1027 "Trace usage of IC buffer") \
1028 \
1029 develop(bool, TraceCompiledIC, false, \
1030 "Trace changes of compiled IC") \
1031 \
1032 develop(bool, FLSVerifyDictionary, false, \
1033 "Do lots of (expensive) FLS dictionary verification") \
1034 \
1035 \
1036 notproduct(bool, CheckMemoryInitialization, false, \
1037 "Check memory initialization") \
1038 \
1039 product(uintx, ProcessDistributionStride, 4, \
1040 "Stride through processors when distributing processes") \
1041 range(0, max_juint) \
1042 \
1043 develop(bool, TraceFinalizerRegistration, false, \
1044 "Trace registration of final references") \
1045 \
1046 product(bool, IgnoreEmptyClassPaths, false, \
1047 "Ignore empty path elements in -classpath") \
1048 \
1049 product(size_t, InitialBootClassLoaderMetaspaceSize, \
1050 NOT_LP64(2200*K) LP64_ONLY(4*M), \
1051 "Initial size of the boot class loader data metaspace") \
1052 range(30*K, max_uintx/BytesPerWord) \
1053 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\
1054 \
1055 product(bool, PrintHeapAtSIGBREAK, true, \
1056 "Print heap layout in response to SIGBREAK") \
1057 \
1058 manageable(bool, PrintClassHistogram, false, \
1059 "Print a histogram of class instances") \
1060 \
1061 develop(bool, IgnoreLibthreadGPFault, false, \
1062 "Suppress workaround for libthread GP fault") \
1063 \
1064 experimental(double, ObjectCountCutOffPercent, 0.5, \
1065 "The percentage of the used heap that the instances of a class " \
1066 "must occupy for the class to generate a trace event") \
1067 range(0.0, 100.0) \
1068 \
1069 /* JVMTI heap profiling */ \
1070 \
1071 diagnostic(bool, TraceJVMTIObjectTagging, false, \
1072 "Trace JVMTI object tagging calls") \
1073 \
1074 diagnostic(bool, VerifyBeforeIteration, false, \
1075 "Verify memory system before JVMTI iteration") \
1076 \
1077 /* compiler interface */ \
1078 \
1079 develop(bool, CIPrintCompilerName, false, \
1080 "when CIPrint is active, print the name of the active compiler") \
1081 \
1082 diagnostic(bool, CIPrintCompileQueue, false, \
1083 "display the contents of the compile queue whenever a " \
1084 "compilation is enqueued") \
1085 \
1086 develop(bool, CIPrintRequests, false, \
1087 "display every request for compilation") \
1088 \
1089 product(bool, CITime, false, \
1090 "collect timing information for compilation") \
1091 \
1092 develop(bool, CITimeVerbose, false, \
1093 "be more verbose in compilation timings") \
1094 \
1095 develop(bool, CITimeEach, false, \
1096 "display timing information after each successful compilation") \
1097 \
1098 develop(bool, CICountOSR, false, \
1099 "use a separate counter when assigning ids to osr compilations") \
1100 \
1101 develop(bool, CICompileNatives, true, \
1102 "compile native methods if supported by the compiler") \
1103 \
1104 develop_pd(bool, CICompileOSR, \
1105 "compile on stack replacement methods if supported by the " \
1106 "compiler") \
1107 \
1108 develop(bool, CIPrintMethodCodes, false, \
1109 "print method bytecodes of the compiled code") \
1110 \
1111 develop(bool, CIPrintTypeFlow, false, \
1112 "print the results of ciTypeFlow analysis") \
1113 \
1114 develop(bool, CITraceTypeFlow, false, \
1115 "detailed per-bytecode tracing of ciTypeFlow analysis") \
1116 \
1117 develop(intx, OSROnlyBCI, -1, \
1118 "OSR only at this bci. Negative values mean exclude that bci") \
1119 \
1120 /* compiler */ \
1121 \
1122 /* notice: the max range value here is max_jint, not max_intx */ \
1123 /* because of overflow issue */ \
1124 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
1125 "Number of compiler threads to run") \
1126 range(0, max_jint) \
1127 constraint(CICompilerCountConstraintFunc, AfterErgo) \
1128 \
1129 product(bool, UseDynamicNumberOfCompilerThreads, true, \
1130 "Dynamically choose the number of parallel compiler threads") \
1131 \
1132 diagnostic(bool, ReduceNumberOfCompilerThreads, true, \
1133 "Reduce the number of parallel compiler threads when they " \
1134 "are not used") \
1135 \
1136 diagnostic(bool, TraceCompilerThreads, false, \
1137 "Trace creation and removal of compiler threads") \
1138 \
1139 develop(bool, InjectCompilerCreationFailure, false, \
1140 "Inject thread creation failures for " \
1141 "UseDynamicNumberOfCompilerThreads") \
1142 \
1143 product(intx, CompilationPolicyChoice, 0, \
1144 "which compilation policy (0-2)") \
1145 range(0, 2) \
1146 \
1147 develop(bool, UseStackBanging, true, \
1148 "use stack banging for stack overflow checks (required for " \
1149 "proper StackOverflow handling; disable only to measure cost " \
1150 "of stackbanging)") \
1151 \
1152 develop(bool, UseStrictFP, true, \
1153 "use strict fp if modifier strictfp is set") \
1154 \
1155 develop(bool, GenerateSynchronizationCode, true, \
1156 "generate locking/unlocking code for synchronized methods and " \
1157 "monitors") \
1158 \
1159 develop(bool, GenerateRangeChecks, true, \
1160 "Generate range checks for array accesses") \
1161 \
1162 diagnostic_pd(bool, ImplicitNullChecks, \
1163 "Generate code for implicit null checks") \
1164 \
1165 product_pd(bool, TrapBasedNullChecks, \
1166 "Generate code for null checks that uses a cmp and trap " \
1167 "instruction raising SIGTRAP. This is only used if an access to" \
1168 "null (+offset) will not raise a SIGSEGV, i.e.," \
1169 "ImplicitNullChecks don't work (PPC64).") \
1170 \
1171 diagnostic(bool, EnableThreadSMRExtraValidityChecks, true, \
1172 "Enable Thread SMR extra validity checks") \
1173 \
1174 diagnostic(bool, EnableThreadSMRStatistics, trueInDebug, \
1175 "Enable Thread SMR Statistics") \
1176 \
1177 product(bool, Inline, true, \
1178 "Enable inlining") \
1179 \
1180 product(bool, ClipInlining, true, \
1181 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \
1182 \
1183 develop(bool, UseCHA, true, \
1184 "Enable CHA") \
1185 \
1186 product(bool, UseTypeProfile, true, \
1187 "Check interpreter profile for historically monomorphic calls") \
1188 \
1189 diagnostic(bool, PrintInlining, false, \
1190 "Print inlining optimizations") \
1191 \
1192 product(bool, UsePopCountInstruction, false, \
1193 "Use population count instruction") \
1194 \
1195 develop(bool, EagerInitialization, false, \
1196 "Eagerly initialize classes if possible") \
1197 \
1198 diagnostic(bool, LogTouchedMethods, false, \
1199 "Log methods which have been ever touched in runtime") \
1200 \
1201 diagnostic(bool, PrintTouchedMethodsAtExit, false, \
1202 "Print all methods that have been ever touched in runtime") \
1203 \
1204 develop(bool, TraceMethodReplacement, false, \
1205 "Print when methods are replaced do to recompilation") \
1206 \
1207 develop(bool, PrintMethodFlushing, false, \
1208 "Print the nmethods being flushed") \
1209 \
1210 diagnostic(bool, PrintMethodFlushingStatistics, false, \
1211 "print statistics about method flushing") \
1212 \
1213 diagnostic(intx, HotMethodDetectionLimit, 100000, \
1214 "Number of compiled code invocations after which " \
1215 "the method is considered as hot by the flusher") \
1216 range(1, max_jint) \
1217 \
1218 diagnostic(intx, MinPassesBeforeFlush, 10, \
1219 "Minimum number of sweeper passes before an nmethod " \
1220 "can be flushed") \
1221 range(0, max_intx) \
1222 \
1223 product(bool, UseCodeAging, true, \
1224 "Insert counter to detect warm methods") \
1225 \
1226 diagnostic(bool, StressCodeAging, false, \
1227 "Start with counters compiled in") \
1228 \
1229 develop(bool, StressCodeBuffers, false, \
1230 "Exercise code buffer expansion and other rare state changes") \
1231 \
1232 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
1233 "Generate extra debugging information for non-safepoints in " \
1234 "nmethods") \
1235 \
1236 product(bool, PrintVMOptions, false, \
1237 "Print flags that appeared on the command line") \
1238 \
1239 product(bool, IgnoreUnrecognizedVMOptions, false, \
1240 "Ignore unrecognized VM options") \
1241 \
1242 product(bool, PrintCommandLineFlags, false, \
1243 "Print flags specified on command line or set by ergonomics") \
1244 \
1245 product(bool, PrintFlagsInitial, false, \
1246 "Print all VM flags before argument processing and exit VM") \
1247 \
1248 product(bool, PrintFlagsFinal, false, \
1249 "Print all VM flags after argument and ergonomic processing") \
1250 \
1251 notproduct(bool, PrintFlagsWithComments, false, \
1252 "Print all VM flags with default values and descriptions and " \
1253 "exit") \
1254 \
1255 product(bool, PrintFlagsRanges, false, \
1256 "Print VM flags and their ranges and exit VM") \
1257 \
1258 diagnostic(bool, SerializeVMOutput, true, \
1259 "Use a mutex to serialize output to tty and LogFile") \
1260 \
1261 diagnostic(bool, DisplayVMOutput, true, \
1262 "Display all VM output on the tty, independently of LogVMOutput") \
1263 \
1264 diagnostic(bool, LogVMOutput, false, \
1265 "Save VM output to LogFile") \
1266 \
1267 diagnostic(ccstr, LogFile, NULL, \
1268 "If LogVMOutput or LogCompilation is on, save VM output to " \
1269 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
1270 \
1271 product(ccstr, ErrorFile, NULL, \
1272 "If an error occurs, save the error data to this file " \
1273 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
1274 \
1275 product(bool, DisplayVMOutputToStderr, false, \
1276 "If DisplayVMOutput is true, display all VM output to stderr") \
1277 \
1278 product(bool, DisplayVMOutputToStdout, false, \
1279 "If DisplayVMOutput is true, display all VM output to stdout") \
1280 \
1281 product(bool, UseHeavyMonitors, false, \
1282 "use heavyweight instead of lightweight Java monitors") \
1283 \
1284 product(bool, PrintStringTableStatistics, false, \
1285 "print statistics about the StringTable and SymbolTable") \
1286 \
1287 diagnostic(bool, VerifyStringTableAtExit, false, \
1288 "verify StringTable contents at exit") \
1289 \
1290 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
1291 "print histogram of the symbol table") \
1292 \
1293 notproduct(bool, ExitVMOnVerifyError, false, \
1294 "standard exit from VM if bytecode verify error " \
1295 "(only in debug mode)") \
1296 \
1297 diagnostic(ccstr, AbortVMOnException, NULL, \
1298 "Call fatal if this exception is thrown. Example: " \
1299 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
1300 \
1301 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \
1302 "Call fatal if the exception pointed by AbortVMOnException " \
1303 "has this message") \
1304 \
1305 develop(bool, DebugVtables, false, \
1306 "add debugging code to vtable dispatch") \
1307 \
1308 notproduct(bool, PrintVtableStats, false, \
1309 "print vtables stats at end of run") \
1310 \
1311 develop(bool, TraceCreateZombies, false, \
1312 "trace creation of zombie nmethods") \
1313 \
1314 notproduct(bool, IgnoreLockingAssertions, false, \
1315 "disable locking assertions (for speed)") \
1316 \
1317 product(bool, RangeCheckElimination, true, \
1318 "Eliminate range checks") \
1319 \
1320 develop_pd(bool, UncommonNullCast, \
1321 "track occurrences of null in casts; adjust compiler tactics") \
1322 \
1323 develop(bool, TypeProfileCasts, true, \
1324 "treat casts like calls for purposes of type profiling") \
1325 \
1326 develop(bool, DelayCompilationDuringStartup, true, \
1327 "Delay invoking the compiler until main application class is " \
1328 "loaded") \
1329 \
1330 develop(bool, CompileTheWorld, false, \
1331 "Compile all methods in all classes in bootstrap class path " \
1332 "(stress test)") \
1333 \
1334 develop(bool, CompileTheWorldPreloadClasses, true, \
1335 "Preload all classes used by a class before start loading") \
1336 \
1337 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
1338 "Force a safepoint every n compiles so sweeper can keep up") \
1339 \
1340 develop(bool, FillDelaySlots, true, \
1341 "Fill delay slots (on SPARC only)") \
1342 \
1343 develop(bool, TimeLivenessAnalysis, false, \
1344 "Time computation of bytecode liveness analysis") \
1345 \
1346 develop(bool, TraceLivenessGen, false, \
1347 "Trace the generation of liveness analysis information") \
1348 \
1349 notproduct(bool, TraceLivenessQuery, false, \
1350 "Trace queries of liveness analysis information") \
1351 \
1352 notproduct(bool, CollectIndexSetStatistics, false, \
1353 "Collect information about IndexSets") \
1354 \
1355 develop(bool, UseLoopSafepoints, true, \
1356 "Generate Safepoint nodes in every loop") \
1357 \
1358 develop(intx, FastAllocateSizeLimit, 128*K, \
1359 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
1360 "Inline allocations larger than this in doublewords must go slow")\
1361 \
1362 product(bool, AggressiveOpts, false, \
1363 "(Deprecated) Enable aggressive optimizations - see arguments.cpp") \
1364 \
1365 product_pd(bool, CompactStrings, \
1366 "Enable Strings to use single byte chars in backing store") \
1367 \
1368 product_pd(uintx, TypeProfileLevel, \
1369 "=XYZ, with Z: Type profiling of arguments at call; " \
1370 "Y: Type profiling of return value at call; " \
1371 "X: Type profiling of parameters to methods; " \
1372 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \
1373 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \
1374 \
1375 product(intx, TypeProfileArgsLimit, 2, \
1376 "max number of call arguments to consider for type profiling") \
1377 range(0, 16) \
1378 \
1379 product(intx, TypeProfileParmsLimit, 2, \
1380 "max number of incoming parameters to consider for type profiling"\
1381 ", -1 for all") \
1382 range(-1, 64) \
1383 \
1384 /* statistics */ \
1385 develop(bool, CountCompiledCalls, false, \
1386 "Count method invocations") \
1387 \
1388 notproduct(bool, CountRuntimeCalls, false, \
1389 "Count VM runtime calls") \
1390 \
1391 develop(bool, CountJNICalls, false, \
1392 "Count jni method invocations") \
1393 \
1394 notproduct(bool, CountJVMCalls, false, \
1395 "Count jvm method invocations") \
1396 \
1397 notproduct(bool, CountRemovableExceptions, false, \
1398 "Count exceptions that could be replaced by branches due to " \
1399 "inlining") \
1400 \
1401 notproduct(bool, ICMissHistogram, false, \
1402 "Produce histogram of IC misses") \
1403 \
1404 /* interpreter */ \
1405 product_pd(bool, RewriteBytecodes, \
1406 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
1407 \
1408 product_pd(bool, RewriteFrequentPairs, \
1409 "Rewrite frequently used bytecode pairs into a single bytecode") \
1410 \
1411 diagnostic(bool, PrintInterpreter, false, \
1412 "Print the generated interpreter code") \
1413 \
1414 product(bool, UseInterpreter, true, \
1415 "Use interpreter for non-compiled methods") \
1416 \
1417 develop(bool, UseFastSignatureHandlers, true, \
1418 "Use fast signature handlers for native calls") \
1419 \
1420 product(bool, UseLoopCounter, true, \
1421 "Increment invocation counter on backward branch") \
1422 \
1423 product_pd(bool, UseOnStackReplacement, \
1424 "Use on stack replacement, calls runtime if invoc. counter " \
1425 "overflows in loop") \
1426 \
1427 notproduct(bool, TraceOnStackReplacement, false, \
1428 "Trace on stack replacement") \
1429 \
1430 product_pd(bool, PreferInterpreterNativeStubs, \
1431 "Use always interpreter stubs for native methods invoked via " \
1432 "interpreter") \
1433 \
1434 develop(bool, CountBytecodes, false, \
1435 "Count number of bytecodes executed") \
1436 \
1437 develop(bool, PrintBytecodeHistogram, false, \
1438 "Print histogram of the executed bytecodes") \
1439 \
1440 develop(bool, PrintBytecodePairHistogram, false, \
1441 "Print histogram of the executed bytecode pairs") \
1442 \
1443 diagnostic(bool, PrintSignatureHandlers, false, \
1444 "Print code generated for native method signature handlers") \
1445 \
1446 develop(bool, VerifyOops, false, \
1447 "Do plausibility checks for oops") \
1448 \
1449 develop(bool, CheckUnhandledOops, false, \
1450 "Check for unhandled oops in VM code") \
1451 \
1452 develop(bool, VerifyJNIFields, trueInDebug, \
1453 "Verify jfieldIDs for instance fields") \
1454 \
1455 notproduct(bool, VerifyJNIEnvThread, false, \
1456 "Verify JNIEnv.thread == Thread::current() when entering VM " \
1457 "from JNI") \
1458 \
1459 develop(bool, VerifyFPU, false, \
1460 "Verify FPU state (check for NaN's, etc.)") \
1461 \
1462 develop(bool, VerifyThread, false, \
1463 "Watch the thread register for corruption (SPARC only)") \
1464 \
1465 develop(bool, VerifyActivationFrameSize, false, \
1466 "Verify that activation frame didn't become smaller than its " \
1467 "minimal size") \
1468 \
1469 develop(bool, TraceFrequencyInlining, false, \
1470 "Trace frequency based inlining") \
1471 \
1472 develop_pd(bool, InlineIntrinsics, \
1473 "Inline intrinsics that can be statically resolved") \
1474 \
1475 product_pd(bool, ProfileInterpreter, \
1476 "Profile at the bytecode level during interpretation") \
1477 \
1478 develop(bool, TraceProfileInterpreter, false, \
1479 "Trace profiling at the bytecode level during interpretation. " \
1480 "This outputs the profiling information collected to improve " \
1481 "jit compilation.") \
1482 \
1483 develop_pd(bool, ProfileTraps, \
1484 "Profile deoptimization traps at the bytecode level") \
1485 \
1486 product(intx, ProfileMaturityPercentage, 20, \
1487 "number of method invocations/branches (expressed as % of " \
1488 "CompileThreshold) before using the method's profile") \
1489 range(0, 100) \
1490 \
1491 diagnostic(bool, PrintMethodData, false, \
1492 "Print the results of +ProfileInterpreter at end of run") \
1493 \
1494 develop(bool, VerifyDataPointer, trueInDebug, \
1495 "Verify the method data pointer during interpreter profiling") \
1496 \
1497 develop(bool, VerifyCompiledCode, false, \
1498 "Include miscellaneous runtime verifications in nmethod code; " \
1499 "default off because it disturbs nmethod size heuristics") \
1500 \
1501 notproduct(bool, CrashGCForDumpingJavaThread, false, \
1502 "Manually make GC thread crash then dump java stack trace; " \
1503 "Test only") \
1504 \
1505 /* compilation */ \
1506 product(bool, UseCompiler, true, \
1507 "Use Just-In-Time compilation") \
1508 \
1509 develop(bool, TraceCompilationPolicy, false, \
1510 "Trace compilation policy") \
1511 \
1512 develop(bool, TimeCompilationPolicy, false, \
1513 "Time the compilation policy") \
1514 \
1515 product(bool, UseCounterDecay, true, \
1516 "Adjust recompilation counters") \
1517 \
1518 develop(intx, CounterHalfLifeTime, 30, \
1519 "Half-life time of invocation counters (in seconds)") \
1520 \
1521 develop(intx, CounterDecayMinIntervalLength, 500, \
1522 "The minimum interval (in milliseconds) between invocation of " \
1523 "CounterDecay") \
1524 \
1525 product(bool, AlwaysCompileLoopMethods, false, \
1526 "When using recompilation, never interpret methods " \
1527 "containing loops") \
1528 \
1529 product(bool, DontCompileHugeMethods, true, \
1530 "Do not compile methods > HugeMethodLimit") \
1531 \
1532 /* Bytecode escape analysis estimation. */ \
1533 product(bool, EstimateArgEscape, true, \
1534 "Analyze bytecodes to estimate escape state of arguments") \
1535 \
1536 product(intx, BCEATraceLevel, 0, \
1537 "How much tracing to do of bytecode escape analysis estimates " \
1538 "(0-3)") \
1539 range(0, 3) \
1540 \
1541 product(intx, MaxBCEAEstimateLevel, 5, \
1542 "Maximum number of nested calls that are analyzed by BC EA") \
1543 range(0, max_jint) \
1544 \
1545 product(intx, MaxBCEAEstimateSize, 150, \
1546 "Maximum bytecode size of a method to be analyzed by BC EA") \
1547 range(0, max_jint) \
1548 \
1549 product(intx, AllocatePrefetchStyle, 1, \
1550 "0 = no prefetch, " \
1551 "1 = generate prefetch instructions for each allocation, " \
1552 "2 = use TLAB watermark to gate allocation prefetch, " \
1553 "3 = generate one prefetch instruction per cache line") \
1554 range(0, 3) \
1555 \
1556 product(intx, AllocatePrefetchDistance, -1, \
1557 "Distance to prefetch ahead of allocation pointer. " \
1558 "-1: use system-specific value (automatically determined") \
1559 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\
1560 \
1561 product(intx, AllocatePrefetchLines, 3, \
1562 "Number of lines to prefetch ahead of array allocation pointer") \
1563 range(1, 64) \
1564 \
1565 product(intx, AllocateInstancePrefetchLines, 1, \
1566 "Number of lines to prefetch ahead of instance allocation " \
1567 "pointer") \
1568 range(1, 64) \
1569 \
1570 product(intx, AllocatePrefetchStepSize, 16, \
1571 "Step size in bytes of sequential prefetch instructions") \
1572 range(1, 512) \
1573 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\
1574 \
1575 product(intx, AllocatePrefetchInstr, 0, \
1576 "Select instruction to prefetch ahead of allocation pointer") \
1577 constraint(AllocatePrefetchInstrConstraintFunc, AfterMemoryInit) \
1578 \
1579 /* deoptimization */ \
1580 develop(bool, TraceDeoptimization, false, \
1581 "Trace deoptimization") \
1582 \
1583 develop(bool, PrintDeoptimizationDetails, false, \
1584 "Print more information about deoptimization") \
1585 \
1586 develop(bool, DebugDeoptimization, false, \
1587 "Tracing various information while debugging deoptimization") \
1588 \
1589 product(intx, SelfDestructTimer, 0, \
1590 "Will cause VM to terminate after a given time (in minutes) " \
1591 "(0 means off)") \
1592 range(0, max_intx) \
1593 \
1594 product(intx, MaxJavaStackTraceDepth, 1024, \
1595 "The maximum number of lines in the stack trace for Java " \
1596 "exceptions (0 means all)") \
1597 range(0, max_jint/2) \
1598 \
1599 /* notice: the max range value here is max_jint, not max_intx */ \
1600 /* because of overflow issue */ \
1601 diagnostic(intx, GuaranteedSafepointInterval, 1000, \
1602 "Guarantee a safepoint (at least) every so many milliseconds " \
1603 "(0 means none)") \
1604 range(0, max_jint) \
1605 \
1606 product(intx, SafepointTimeoutDelay, 10000, \
1607 "Delay in milliseconds for option SafepointTimeout") \
1608 LP64_ONLY(range(0, max_intx/MICROUNITS)) \
1609 NOT_LP64(range(0, max_intx)) \
1610 \
1611 product(intx, NmethodSweepActivity, 10, \
1612 "Removes cold nmethods from code cache if > 0. Higher values " \
1613 "result in more aggressive sweeping") \
1614 range(0, 2000) \
1615 \
1616 notproduct(bool, LogSweeper, false, \
1617 "Keep a ring buffer of sweeper activity") \
1618 \
1619 notproduct(intx, SweeperLogEntries, 1024, \
1620 "Number of records in the ring buffer of sweeper activity") \
1621 \
1622 notproduct(intx, MemProfilingInterval, 500, \
1623 "Time between each invocation of the MemProfiler") \
1624 \
1625 develop(intx, MallocCatchPtr, -1, \
1626 "Hit breakpoint when mallocing/freeing this pointer") \
1627 \
1628 notproduct(ccstrlist, SuppressErrorAt, "", \
1629 "List of assertions (file:line) to muzzle") \
1630 \
1631 develop(intx, StackPrintLimit, 100, \
1632 "number of stack frames to print in VM-level stack dump") \
1633 \
1634 notproduct(intx, MaxElementPrintSize, 256, \
1635 "maximum number of elements to print") \
1636 \
1637 notproduct(intx, MaxSubklassPrintSize, 4, \
1638 "maximum number of subklasses to print when printing klass") \
1639 \
1640 product(intx, MaxInlineLevel, 9, \
1641 "maximum number of nested calls that are inlined") \
1642 range(0, max_jint) \
1643 \
1644 product(intx, MaxRecursiveInlineLevel, 1, \
1645 "maximum number of nested recursive calls that are inlined") \
1646 range(0, max_jint) \
1647 \
1648 develop(intx, MaxForceInlineLevel, 100, \
1649 "maximum number of nested calls that are forced for inlining " \
1650 "(using CompileCommand or marked w/ @ForceInline)") \
1651 range(0, max_jint) \
1652 \
1653 product_pd(intx, InlineSmallCode, \
1654 "Only inline already compiled methods if their code size is " \
1655 "less than this") \
1656 range(0, max_jint) \
1657 \
1658 product(intx, MaxInlineSize, 35, \
1659 "The maximum bytecode size of a method to be inlined") \
1660 range(0, max_jint) \
1661 \
1662 product_pd(intx, FreqInlineSize, \
1663 "The maximum bytecode size of a frequent method to be inlined") \
1664 range(0, max_jint) \
1665 \
1666 product(intx, MaxTrivialSize, 6, \
1667 "The maximum bytecode size of a trivial method to be inlined") \
1668 range(0, max_jint) \
1669 \
1670 product(intx, MinInliningThreshold, 250, \
1671 "The minimum invocation count a method needs to have to be " \
1672 "inlined") \
1673 range(0, max_jint) \
1674 \
1675 develop(intx, MethodHistogramCutoff, 100, \
1676 "The cutoff value for method invocation histogram (+CountCalls)") \
1677 \
1678 diagnostic(intx, ProfilerNumberOfInterpretedMethods, 25, \
1679 "Number of interpreted methods to show in profile") \
1680 \
1681 diagnostic(intx, ProfilerNumberOfCompiledMethods, 25, \
1682 "Number of compiled methods to show in profile") \
1683 \
1684 diagnostic(intx, ProfilerNumberOfStubMethods, 25, \
1685 "Number of stub methods to show in profile") \
1686 \
1687 diagnostic(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
1688 "Number of runtime stub nodes to show in profile") \
1689 \
1690 product(intx, ProfileIntervalsTicks, 100, \
1691 "Number of ticks between printing of interval profile " \
1692 "(+ProfileIntervals)") \
1693 range(0, max_intx) \
1694 \
1695 develop(intx, DontYieldALotInterval, 10, \
1696 "Interval between which yields will be dropped (milliseconds)") \
1697 \
1698 develop(intx, ProfilerPCTickThreshold, 15, \
1699 "Number of ticks in a PC buckets to be a hotspot") \
1700 \
1701 notproduct(intx, DeoptimizeALotInterval, 5, \
1702 "Number of exits until DeoptimizeALot kicks in") \
1703 \
1704 notproduct(intx, ZombieALotInterval, 5, \
1705 "Number of exits until ZombieALot kicks in") \
1706 \
1707 diagnostic(uintx, MallocMaxTestWords, 0, \
1708 "If non-zero, maximum number of words that malloc/realloc can " \
1709 "allocate (for testing only)") \
1710 range(0, max_uintx) \
1711 \
1712 product(intx, TypeProfileWidth, 2, \
1713 "Number of receiver types to record in call/cast profile") \
1714 range(0, 8) \
1715 \
1716 develop(intx, BciProfileWidth, 2, \
1717 "Number of return bci's to record in ret profile") \
1718 \
1719 product(intx, PerMethodRecompilationCutoff, 400, \
1720 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
1721 range(-1, max_intx) \
1722 \
1723 product(intx, PerBytecodeRecompilationCutoff, 200, \
1724 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
1725 range(-1, max_intx) \
1726 \
1727 product(intx, PerMethodTrapLimit, 100, \
1728 "Limit on traps (of one kind) in a method (includes inlines)") \
1729 range(0, max_jint) \
1730 \
1731 experimental(intx, PerMethodSpecTrapLimit, 5000, \
1732 "Limit on speculative traps (of one kind) in a method " \
1733 "(includes inlines)") \
1734 range(0, max_jint) \
1735 \
1736 product(intx, PerBytecodeTrapLimit, 4, \
1737 "Limit on traps (of one kind) at a particular BCI") \
1738 range(0, max_jint) \
1739 \
1740 experimental(intx, SpecTrapLimitExtraEntries, 3, \
1741 "Extra method data trap entries for speculation") \
1742 \
1743 develop(intx, InlineFrequencyRatio, 20, \
1744 "Ratio of call site execution to caller method invocation") \
1745 range(0, max_jint) \
1746 \
1747 diagnostic_pd(intx, InlineFrequencyCount, \
1748 "Count of call site execution necessary to trigger frequent " \
1749 "inlining") \
1750 range(0, max_jint) \
1751 \
1752 develop(intx, InlineThrowCount, 50, \
1753 "Force inlining of interpreted methods that throw this often") \
1754 range(0, max_jint) \
1755 \
1756 develop(intx, InlineThrowMaxSize, 200, \
1757 "Force inlining of throwing methods smaller than this") \
1758 range(0, max_jint) \
1759 \
1760 develop(intx, ProfilerNodeSize, 1024, \
1761 "Size in K to allocate for the Profile Nodes of each thread") \
1762 range(0, 1024) \
1763 \
1764 product_pd(size_t, MetaspaceSize, \
1765 "Initial threshold (in bytes) at which a garbage collection " \
1766 "is done to reduce Metaspace usage") \
1767 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \
1768 \
1769 product(size_t, MaxMetaspaceSize, max_uintx, \
1770 "Maximum size of Metaspaces (in bytes)") \
1771 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \
1772 \
1773 product(size_t, CompressedClassSpaceSize, 1*G, \
1774 "Maximum size of class area in Metaspace when compressed " \
1775 "class pointers are used") \
1776 range(1*M, 3*G) \
1777 \
1778 manageable(uintx, MinHeapFreeRatio, 40, \
1779 "The minimum percentage of heap free after GC to avoid expansion."\
1780 " For most GCs this applies to the old generation. In G1 and" \
1781 " ParallelGC it applies to the whole heap.") \
1782 range(0, 100) \
1783 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \
1784 \
1785 manageable(uintx, MaxHeapFreeRatio, 70, \
1786 "The maximum percentage of heap free after GC to avoid shrinking."\
1787 " For most GCs this applies to the old generation. In G1 and" \
1788 " ParallelGC it applies to the whole heap.") \
1789 range(0, 100) \
1790 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \
1791 \
1792 product(bool, ShrinkHeapInSteps, true, \
1793 "When disabled, informs the GC to shrink the java heap directly" \
1794 " to the target size at the next full GC rather than requiring" \
1795 " smaller steps during multiple full GCs.") \
1796 \
1797 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
1798 "Number of milliseconds per MB of free space in the heap") \
1799 range(0, max_intx) \
1800 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \
1801 \
1802 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
1803 "The minimum change in heap space due to GC (in bytes)") \
1804 range(0, max_uintx) \
1805 \
1806 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \
1807 "The minimum expansion of Metaspace (in bytes)") \
1808 range(0, max_uintx) \
1809 \
1810 product(uintx, MaxMetaspaceFreeRatio, 70, \
1811 "The maximum percentage of Metaspace free after GC to avoid " \
1812 "shrinking") \
1813 range(0, 100) \
1814 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \
1815 \
1816 product(uintx, MinMetaspaceFreeRatio, 40, \
1817 "The minimum percentage of Metaspace free after GC to avoid " \
1818 "expansion") \
1819 range(0, 99) \
1820 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \
1821 \
1822 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \
1823 "The maximum expansion of Metaspace without full GC (in bytes)") \
1824 range(0, max_uintx) \
1825 \
1826 /* stack parameters */ \
1827 product_pd(intx, StackYellowPages, \
1828 "Number of yellow zone (recoverable overflows) pages of size " \
1829 "4KB. If pages are bigger yellow zone is aligned up.") \
1830 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \
1831 \
1832 product_pd(intx, StackRedPages, \
1833 "Number of red zone (unrecoverable overflows) pages of size " \
1834 "4KB. If pages are bigger red zone is aligned up.") \
1835 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \
1836 \
1837 product_pd(intx, StackReservedPages, \
1838 "Number of reserved zone (reserved to annotated methods) pages" \
1839 " of size 4KB. If pages are bigger reserved zone is aligned up.") \
1840 range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\
1841 \
1842 product(bool, RestrictReservedStack, true, \
1843 "Restrict @ReservedStackAccess to trusted classes") \
1844 \
1845 /* greater stack shadow pages can't generate instruction to bang stack */ \
1846 product_pd(intx, StackShadowPages, \
1847 "Number of shadow zone (for overflow checking) pages of size " \
1848 "4KB. If pages are bigger shadow zone is aligned up. " \
1849 "This should exceed the depth of the VM and native call stack.") \
1850 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \
1851 \
1852 product_pd(intx, ThreadStackSize, \
1853 "Thread Stack Size (in Kbytes)") \
1854 range(0, 1 * M) \
1855 \
1856 product_pd(intx, VMThreadStackSize, \
1857 "Non-Java Thread Stack Size (in Kbytes)") \
1858 range(0, max_intx/(1 * K)) \
1859 \
1860 product_pd(intx, CompilerThreadStackSize, \
1861 "Compiler Thread Stack Size (in Kbytes)") \
1862 range(0, max_intx/(1 * K)) \
1863 \
1864 develop_pd(size_t, JVMInvokeMethodSlack, \
1865 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
1866 \
1867 /* code cache parameters */ \
1868 develop_pd(uintx, CodeCacheSegmentSize, \
1869 "Code cache segment size (in bytes) - smallest unit of " \
1870 "allocation") \
1871 range(1, 1024) \
1872 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \
1873 \
1874 develop_pd(intx, CodeEntryAlignment, \
1875 "Code entry alignment for generated code (in bytes)") \
1876 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \
1877 \
1878 product_pd(intx, OptoLoopAlignment, \
1879 "Align inner loops to zero relative to this modulus") \
1880 range(1, 16) \
1881 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \
1882 \
1883 product_pd(uintx, InitialCodeCacheSize, \
1884 "Initial code cache size (in bytes)") \
1885 range(os::vm_page_size(), max_uintx) \
1886 \
1887 develop_pd(uintx, CodeCacheMinimumUseSpace, \
1888 "Minimum code cache size (in bytes) required to start VM.") \
1889 range(0, max_uintx) \
1890 \
1891 product(bool, SegmentedCodeCache, false, \
1892 "Use a segmented code cache") \
1893 \
1894 product_pd(uintx, ReservedCodeCacheSize, \
1895 "Reserved code cache size (in bytes) - maximum code cache size") \
1896 range(os::vm_page_size(), max_uintx) \
1897 \
1898 product_pd(uintx, NonProfiledCodeHeapSize, \
1899 "Size of code heap with non-profiled methods (in bytes)") \
1900 range(0, max_uintx) \
1901 \
1902 product_pd(uintx, ProfiledCodeHeapSize, \
1903 "Size of code heap with profiled methods (in bytes)") \
1904 range(0, max_uintx) \
1905 \
1906 product_pd(uintx, NonNMethodCodeHeapSize, \
1907 "Size of code heap with non-nmethods (in bytes)") \
1908 range(os::vm_page_size(), max_uintx) \
1909 \
1910 product_pd(uintx, CodeCacheExpansionSize, \
1911 "Code cache expansion size (in bytes)") \
1912 range(32*K, max_uintx) \
1913 \
1914 diagnostic_pd(uintx, CodeCacheMinBlockLength, \
1915 "Minimum number of segments in a code cache block") \
1916 range(1, 100) \
1917 \
1918 notproduct(bool, ExitOnFullCodeCache, false, \
1919 "Exit the VM if we fill the code cache") \
1920 \
1921 product(bool, UseCodeCacheFlushing, true, \
1922 "Remove cold/old nmethods from the code cache") \
1923 \
1924 product(uintx, StartAggressiveSweepingAt, 10, \
1925 "Start aggressive sweeping if X[%] of the code cache is free." \
1926 "Segmented code cache: X[%] of the non-profiled heap." \
1927 "Non-segmented code cache: X[%] of the total code cache") \
1928 range(0, 100) \
1929 \
1930 /* AOT parameters */ \
1931 product(bool, UseAOT, AOT_ONLY(true) NOT_AOT(false), \
1932 "Use AOT compiled files") \
1933 \
1934 product(ccstrlist, AOTLibrary, NULL, \
1935 "AOT library") \
1936 \
1937 product(bool, PrintAOT, false, \
1938 "Print used AOT klasses and methods") \
1939 \
1940 notproduct(bool, PrintAOTStatistics, false, \
1941 "Print AOT statistics") \
1942 \
1943 diagnostic(bool, UseAOTStrictLoading, false, \
1944 "Exit the VM if any of the AOT libraries has invalid config") \
1945 \
1946 product(bool, CalculateClassFingerprint, false, \
1947 "Calculate class fingerprint") \
1948 \
1949 /* interpreter debugging */ \
1950 develop(intx, BinarySwitchThreshold, 5, \
1951 "Minimal number of lookupswitch entries for rewriting to binary " \
1952 "switch") \
1953 \
1954 develop(intx, StopInterpreterAt, 0, \
1955 "Stop interpreter execution at specified bytecode number") \
1956 \
1957 develop(intx, TraceBytecodesAt, 0, \
1958 "Trace bytecodes starting with specified bytecode number") \
1959 \
1960 /* compiler interface */ \
1961 develop(intx, CIStart, 0, \
1962 "The id of the first compilation to permit") \
1963 \
1964 develop(intx, CIStop, max_jint, \
1965 "The id of the last compilation to permit") \
1966 \
1967 develop(intx, CIStartOSR, 0, \
1968 "The id of the first osr compilation to permit " \
1969 "(CICountOSR must be on)") \
1970 \
1971 develop(intx, CIStopOSR, max_jint, \
1972 "The id of the last osr compilation to permit " \
1973 "(CICountOSR must be on)") \
1974 \
1975 develop(intx, CIBreakAtOSR, -1, \
1976 "The id of osr compilation to break at") \
1977 \
1978 develop(intx, CIBreakAt, -1, \
1979 "The id of compilation to break at") \
1980 \
1981 product(ccstrlist, CompileOnly, "", \
1982 "List of methods (pkg/class.name) to restrict compilation to") \
1983 \
1984 product(ccstr, CompileCommandFile, NULL, \
1985 "Read compiler commands from this file [.hotspot_compiler]") \
1986 \
1987 diagnostic(ccstr, CompilerDirectivesFile, NULL, \
1988 "Read compiler directives from this file") \
1989 \
1990 product(ccstrlist, CompileCommand, "", \
1991 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
1992 \
1993 develop(bool, ReplayCompiles, false, \
1994 "Enable replay of compilations from ReplayDataFile") \
1995 \
1996 product(ccstr, ReplayDataFile, NULL, \
1997 "File containing compilation replay information" \
1998 "[default: ./replay_pid%p.log] (%p replaced with pid)") \
1999 \
2000 product(ccstr, InlineDataFile, NULL, \
2001 "File containing inlining replay information" \
2002 "[default: ./inline_pid%p.log] (%p replaced with pid)") \
2003 \
2004 develop(intx, ReplaySuppressInitializers, 2, \
2005 "Control handling of class initialization during replay: " \
2006 "0 - don't do anything special; " \
2007 "1 - treat all class initializers as empty; " \
2008 "2 - treat class initializers for application classes as empty; " \
2009 "3 - allow all class initializers to run during bootstrap but " \
2010 " pretend they are empty after starting replay") \
2011 range(0, 3) \
2012 \
2013 develop(bool, ReplayIgnoreInitErrors, false, \
2014 "Ignore exceptions thrown during initialization for replay") \
2015 \
2016 product(bool, DumpReplayDataOnError, true, \
2017 "Record replay data for crashing compiler threads") \
2018 \
2019 product(bool, CICompilerCountPerCPU, false, \
2020 "1 compiler thread for log(N CPUs)") \
2021 \
2022 develop(intx, CIFireOOMAt, -1, \
2023 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
2024 "(non-negative value throws OOM after this many CI accesses " \
2025 "in each compile)") \
2026 notproduct(intx, CICrashAt, -1, \
2027 "id of compilation to trigger assert in compiler thread for " \
2028 "the purpose of testing, e.g. generation of replay data") \
2029 notproduct(bool, CIObjectFactoryVerify, false, \
2030 "enable potentially expensive verification in ciObjectFactory") \
2031 \
2032 /* Priorities */ \
2033 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
2034 \
2035 product(intx, ThreadPriorityPolicy, 0, \
2036 "0 : Normal. "\
2037 " VM chooses priorities that are appropriate for normal "\
2038 " applications. On Solaris NORM_PRIORITY and above are mapped "\
2039 " to normal native priority. Java priorities below " \
2040 " NORM_PRIORITY map to lower native priority values. On "\
2041 " Windows applications are allowed to use higher native "\
2042 " priorities. However, with ThreadPriorityPolicy=0, VM will "\
2043 " not use the highest possible native priority, "\
2044 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\
2045 " system threads. On Linux thread priorities are ignored "\
2046 " because the OS does not support static priority in "\
2047 " SCHED_OTHER scheduling class which is the only choice for "\
2048 " non-root, non-realtime applications. "\
2049 "1 : Aggressive. "\
2050 " Java thread priorities map over to the entire range of "\
2051 " native thread priorities. Higher Java thread priorities map "\
2052 " to higher native thread priorities. This policy should be "\
2053 " used with care, as sometimes it can cause performance "\
2054 " degradation in the application and/or the entire system. On "\
2055 " Linux this policy requires root privilege.") \
2056 range(0, 1) \
2057 \
2058 product(bool, ThreadPriorityVerbose, false, \
2059 "Print priority changes") \
2060 \
2061 product(intx, CompilerThreadPriority, -1, \
2062 "The native priority at which compiler threads should run " \
2063 "(-1 means no change)") \
2064 range(min_jint, max_jint) \
2065 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \
2066 \
2067 product(intx, VMThreadPriority, -1, \
2068 "The native priority at which the VM thread should run " \
2069 "(-1 means no change)") \
2070 range(-1, 127) \
2071 \
2072 product(intx, JavaPriority1_To_OSPriority, -1, \
2073 "Map Java priorities to OS priorities") \
2074 range(-1, 127) \
2075 \
2076 product(intx, JavaPriority2_To_OSPriority, -1, \
2077 "Map Java priorities to OS priorities") \
2078 range(-1, 127) \
2079 \
2080 product(intx, JavaPriority3_To_OSPriority, -1, \
2081 "Map Java priorities to OS priorities") \
2082 range(-1, 127) \
2083 \
2084 product(intx, JavaPriority4_To_OSPriority, -1, \
2085 "Map Java priorities to OS priorities") \
2086 range(-1, 127) \
2087 \
2088 product(intx, JavaPriority5_To_OSPriority, -1, \
2089 "Map Java priorities to OS priorities") \
2090 range(-1, 127) \
2091 \
2092 product(intx, JavaPriority6_To_OSPriority, -1, \
2093 "Map Java priorities to OS priorities") \
2094 range(-1, 127) \
2095 \
2096 product(intx, JavaPriority7_To_OSPriority, -1, \
2097 "Map Java priorities to OS priorities") \
2098 range(-1, 127) \
2099 \
2100 product(intx, JavaPriority8_To_OSPriority, -1, \
2101 "Map Java priorities to OS priorities") \
2102 range(-1, 127) \
2103 \
2104 product(intx, JavaPriority9_To_OSPriority, -1, \
2105 "Map Java priorities to OS priorities") \
2106 range(-1, 127) \
2107 \
2108 product(intx, JavaPriority10_To_OSPriority,-1, \
2109 "Map Java priorities to OS priorities") \
2110 range(-1, 127) \
2111 \
2112 experimental(bool, UseCriticalJavaThreadPriority, false, \
2113 "Java thread priority 10 maps to critical scheduling priority") \
2114 \
2115 experimental(bool, UseCriticalCompilerThreadPriority, false, \
2116 "Compiler thread(s) run at critical scheduling priority") \
2117 \
2118 experimental(bool, UseCriticalCMSThreadPriority, false, \
2119 "ConcurrentMarkSweep thread runs at critical scheduling priority")\
2120 \
2121 /* compiler debugging */ \
2122 notproduct(intx, CompileTheWorldStartAt, 1, \
2123 "First class to consider when using +CompileTheWorld") \
2124 \
2125 notproduct(intx, CompileTheWorldStopAt, max_jint, \
2126 "Last class to consider when using +CompileTheWorld") \
2127 \
2128 develop(intx, NewCodeParameter, 0, \
2129 "Testing Only: Create a dedicated integer parameter before " \
2130 "putback") \
2131 \
2132 /* new oopmap storage allocation */ \
2133 develop(intx, MinOopMapAllocation, 8, \
2134 "Minimum number of OopMap entries in an OopMapSet") \
2135 \
2136 /* Background Compilation */ \
2137 develop(intx, LongCompileThreshold, 50, \
2138 "Used with +TraceLongCompiles") \
2139 \
2140 /* recompilation */ \
2141 product_pd(intx, CompileThreshold, \
2142 "number of interpreted method invocations before (re-)compiling") \
2143 constraint(CompileThresholdConstraintFunc, AfterErgo) \
2144 \
2145 product(double, CompileThresholdScaling, 1.0, \
2146 "Factor to control when first compilation happens " \
2147 "(both with and without tiered compilation): " \
2148 "values greater than 1.0 delay counter overflow, " \
2149 "values between 0 and 1.0 rush counter overflow, " \
2150 "value of 1.0 leaves compilation thresholds unchanged " \
2151 "value of 0.0 is equivalent to -Xint. " \
2152 "" \
2153 "Flag can be set as per-method option. " \
2154 "If a value is specified for a method, compilation thresholds " \
2155 "for that method are scaled by both the value of the global flag "\
2156 "and the value of the per-method flag.") \
2157 range(0.0, DBL_MAX) \
2158 \
2159 product(intx, Tier0InvokeNotifyFreqLog, 7, \
2160 "Interpreter (tier 0) invocation notification frequency") \
2161 range(0, 30) \
2162 \
2163 product(intx, Tier2InvokeNotifyFreqLog, 11, \
2164 "C1 without MDO (tier 2) invocation notification frequency") \
2165 range(0, 30) \
2166 \
2167 product(intx, Tier3InvokeNotifyFreqLog, 10, \
2168 "C1 with MDO profiling (tier 3) invocation notification " \
2169 "frequency") \
2170 range(0, 30) \
2171 \
2172 product(intx, Tier23InlineeNotifyFreqLog, 20, \
2173 "Inlinee invocation (tiers 2 and 3) notification frequency") \
2174 range(0, 30) \
2175 \
2176 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
2177 "Interpreter (tier 0) invocation notification frequency") \
2178 range(0, 30) \
2179 \
2180 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
2181 "C1 without MDO (tier 2) invocation notification frequency") \
2182 range(0, 30) \
2183 \
2184 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
2185 "C1 with MDO profiling (tier 3) invocation notification " \
2186 "frequency") \
2187 range(0, 30) \
2188 \
2189 product(intx, Tier2CompileThreshold, 0, \
2190 "threshold at which tier 2 compilation is invoked") \
2191 range(0, max_jint) \
2192 \
2193 product(intx, Tier2BackEdgeThreshold, 0, \
2194 "Back edge threshold at which tier 2 compilation is invoked") \
2195 range(0, max_jint) \
2196 \
2197 product(intx, Tier3InvocationThreshold, 200, \
2198 "Compile if number of method invocations crosses this " \
2199 "threshold") \
2200 range(0, max_jint) \
2201 \
2202 product(intx, Tier3MinInvocationThreshold, 100, \
2203 "Minimum invocation to compile at tier 3") \
2204 range(0, max_jint) \
2205 \
2206 product(intx, Tier3CompileThreshold, 2000, \
2207 "Threshold at which tier 3 compilation is invoked (invocation " \
2208 "minimum must be satisfied)") \
2209 range(0, max_jint) \
2210 \
2211 product(intx, Tier3BackEdgeThreshold, 60000, \
2212 "Back edge threshold at which tier 3 OSR compilation is invoked") \
2213 range(0, max_jint) \
2214 \
2215 product(intx, Tier3AOTInvocationThreshold, 10000, \
2216 "Compile if number of method invocations crosses this " \
2217 "threshold if coming from AOT") \
2218 range(0, max_jint) \
2219 \
2220 product(intx, Tier3AOTMinInvocationThreshold, 1000, \
2221 "Minimum invocation to compile at tier 3 if coming from AOT") \
2222 range(0, max_jint) \
2223 \
2224 product(intx, Tier3AOTCompileThreshold, 15000, \
2225 "Threshold at which tier 3 compilation is invoked (invocation " \
2226 "minimum must be satisfied) if coming from AOT") \
2227 range(0, max_jint) \
2228 \
2229 product(intx, Tier3AOTBackEdgeThreshold, 120000, \
2230 "Back edge threshold at which tier 3 OSR compilation is invoked " \
2231 "if coming from AOT") \
2232 range(0, max_jint) \
2233 \
2234 product(intx, Tier4InvocationThreshold, 5000, \
2235 "Compile if number of method invocations crosses this " \
2236 "threshold") \
2237 range(0, max_jint) \
2238 \
2239 product(intx, Tier4MinInvocationThreshold, 600, \
2240 "Minimum invocation to compile at tier 4") \
2241 range(0, max_jint) \
2242 \
2243 product(intx, Tier4CompileThreshold, 15000, \
2244 "Threshold at which tier 4 compilation is invoked (invocation " \
2245 "minimum must be satisfied") \
2246 range(0, max_jint) \
2247 \
2248 product(intx, Tier4BackEdgeThreshold, 40000, \
2249 "Back edge threshold at which tier 4 OSR compilation is invoked") \
2250 range(0, max_jint) \
2251 \
2252 product(intx, Tier3DelayOn, 5, \
2253 "If C2 queue size grows over this amount per compiler thread " \
2254 "stop compiling at tier 3 and start compiling at tier 2") \
2255 range(0, max_jint) \
2256 \
2257 product(intx, Tier3DelayOff, 2, \
2258 "If C2 queue size is less than this amount per compiler thread " \
2259 "allow methods compiled at tier 2 transition to tier 3") \
2260 range(0, max_jint) \
2261 \
2262 product(intx, Tier3LoadFeedback, 5, \
2263 "Tier 3 thresholds will increase twofold when C1 queue size " \
2264 "reaches this amount per compiler thread") \
2265 range(0, max_jint) \
2266 \
2267 product(intx, Tier4LoadFeedback, 3, \
2268 "Tier 4 thresholds will increase twofold when C2 queue size " \
2269 "reaches this amount per compiler thread") \
2270 range(0, max_jint) \
2271 \
2272 product(intx, TieredCompileTaskTimeout, 50, \
2273 "Kill compile task if method was not used within " \
2274 "given timeout in milliseconds") \
2275 range(0, max_intx) \
2276 \
2277 product(intx, TieredStopAtLevel, 4, \
2278 "Stop at given compilation level") \
2279 range(0, 4) \
2280 \
2281 product(intx, Tier0ProfilingStartPercentage, 200, \
2282 "Start profiling in interpreter if the counters exceed tier 3 " \
2283 "thresholds by the specified percentage") \
2284 range(0, max_jint) \
2285 \
2286 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \
2287 "Increase the compile threshold for C1 compilation if the code " \
2288 "cache is filled by the specified percentage") \
2289 range(0, 99) \
2290 \
2291 product(intx, TieredRateUpdateMinTime, 1, \
2292 "Minimum rate sampling interval (in milliseconds)") \
2293 range(0, max_intx) \
2294 \
2295 product(intx, TieredRateUpdateMaxTime, 25, \
2296 "Maximum rate sampling interval (in milliseconds)") \
2297 range(0, max_intx) \
2298 \
2299 product_pd(bool, TieredCompilation, \
2300 "Enable tiered compilation") \
2301 \
2302 product(bool, PrintTieredEvents, false, \
2303 "Print tiered events notifications") \
2304 \
2305 product_pd(intx, OnStackReplacePercentage, \
2306 "NON_TIERED number of method invocations/branches (expressed as " \
2307 "% of CompileThreshold) before (re-)compiling OSR code") \
2308 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \
2309 \
2310 product(intx, InterpreterProfilePercentage, 33, \
2311 "NON_TIERED number of method invocations/branches (expressed as " \
2312 "% of CompileThreshold) before profiling in the interpreter") \
2313 range(0, 100) \
2314 \
2315 develop(intx, MaxRecompilationSearchLength, 10, \
2316 "The maximum number of frames to inspect when searching for " \
2317 "recompilee") \
2318 \
2319 develop(intx, MaxInterpretedSearchLength, 3, \
2320 "The maximum number of interpreted frames to skip when searching "\
2321 "for recompilee") \
2322 \
2323 develop(intx, DesiredMethodLimit, 8000, \
2324 "The desired maximum method size (in bytecodes) after inlining") \
2325 \
2326 develop(intx, HugeMethodLimit, 8000, \
2327 "Don't compile methods larger than this if " \
2328 "+DontCompileHugeMethods") \
2329 \
2330 /* New JDK 1.4 reflection implementation */ \
2331 \
2332 develop(intx, FastSuperclassLimit, 8, \
2333 "Depth of hardwired instanceof accelerator array") \
2334 \
2335 /* Properties for Java libraries */ \
2336 \
2337 product(uint64_t, MaxDirectMemorySize, 0, \
2338 "Maximum total size of NIO direct-buffer allocations") \
2339 range(0, max_jlong) \
2340 \
2341 /* Flags used for temporary code during development */ \
2342 \
2343 diagnostic(bool, UseNewCode, false, \
2344 "Testing Only: Use the new version while testing") \
2345 \
2346 diagnostic(bool, UseNewCode2, false, \
2347 "Testing Only: Use the new version while testing") \
2348 \
2349 diagnostic(bool, UseNewCode3, false, \
2350 "Testing Only: Use the new version while testing") \
2351 \
2352 /* flags for performance data collection */ \
2353 \
2354 product(bool, UsePerfData, true, \
2355 "Flag to disable jvmstat instrumentation for performance testing "\
2356 "and problem isolation purposes") \
2357 \
2358 product(bool, PerfDataSaveToFile, false, \
2359 "Save PerfData memory to hsperfdata_<pid> file on exit") \
2360 \
2361 product(ccstr, PerfDataSaveFile, NULL, \
2362 "Save PerfData memory to the specified absolute pathname. " \
2363 "The string %p in the file name (if present) " \
2364 "will be replaced by pid") \
2365 \
2366 product(intx, PerfDataSamplingInterval, 50, \
2367 "Data sampling interval (in milliseconds)") \
2368 range(PeriodicTask::min_interval, max_jint) \
2369 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \
2370 \
2371 product(bool, PerfDisableSharedMem, false, \
2372 "Store performance data in standard memory") \
2373 \
2374 product(intx, PerfDataMemorySize, 32*K, \
2375 "Size of performance data memory region. Will be rounded " \
2376 "up to a multiple of the native os page size.") \
2377 range(128, 32*64*K) \
2378 \
2379 product(intx, PerfMaxStringConstLength, 1024, \
2380 "Maximum PerfStringConstant string length before truncation") \
2381 range(32, 32*K) \
2382 \
2383 product(bool, PerfAllowAtExitRegistration, false, \
2384 "Allow registration of atexit() methods") \
2385 \
2386 product(bool, PerfBypassFileSystemCheck, false, \
2387 "Bypass Win32 file system criteria checks (Windows Only)") \
2388 \
2389 product(intx, UnguardOnExecutionViolation, 0, \
2390 "Unguard page and retry on no-execute fault (Win32 only) " \
2391 "0=off, 1=conservative, 2=aggressive") \
2392 range(0, 2) \
2393 \
2394 /* Serviceability Support */ \
2395 \
2396 product(bool, ManagementServer, false, \
2397 "Create JMX Management Server") \
2398 \
2399 product(bool, DisableAttachMechanism, false, \
2400 "Disable mechanism that allows tools to attach to this VM") \
2401 \
2402 product(bool, StartAttachListener, false, \
2403 "Always start Attach Listener at VM startup") \
2404 \
2405 product(bool, EnableDynamicAgentLoading, true, \
2406 "Allow tools to load agents with the attach mechanism") \
2407 \
2408 manageable(bool, PrintConcurrentLocks, false, \
2409 "Print java.util.concurrent locks in thread dump") \
2410 \
2411 /* Shared spaces */ \
2412 \
2413 product(bool, UseSharedSpaces, true, \
2414 "Use shared spaces for metadata") \
2415 \
2416 product(bool, VerifySharedSpaces, false, \
2417 "Verify shared spaces (false for default archive, true for " \
2418 "archive specified by -XX:SharedArchiveFile)") \
2419 \
2420 product(bool, RequireSharedSpaces, false, \
2421 "Require shared spaces for metadata") \
2422 \
2423 product(bool, DumpSharedSpaces, false, \
2424 "Special mode: JVM reads a class list, loads classes, builds " \
2425 "shared spaces, and dumps the shared spaces to a file to be " \
2426 "used in future JVM runs") \
2427 \
2428 product(bool, PrintSharedArchiveAndExit, false, \
2429 "Print shared archive file contents") \
2430 \
2431 product(bool, PrintSharedDictionary, false, \
2432 "If PrintSharedArchiveAndExit is true, also print the shared " \
2433 "dictionary") \
2434 \
2435 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \
2436 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \
2437 "Address to allocate shared memory region for class data") \
2438 range(0, SIZE_MAX) \
2439 \
2440 product(ccstr, SharedArchiveConfigFile, NULL, \
2441 "Data to add to the CDS archive file") \
2442 \
2443 product(uintx, SharedSymbolTableBucketSize, 4, \
2444 "Average number of symbols per bucket in shared table") \
2445 range(2, 246) \
2446 \
2447 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, true, \
2448 "Do not quit -Xshare:dump even if we encounter unverifiable " \
2449 "classes. Just exclude them from the shared dictionary.") \
2450 \
2451 diagnostic(bool, PrintMethodHandleStubs, false, \
2452 "Print generated stub code for method handles") \
2453 \
2454 develop(bool, TraceMethodHandles, false, \
2455 "trace internal method handle operations") \
2456 \
2457 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
2458 "perform extra checks when constructing method handles") \
2459 \
2460 diagnostic(bool, ShowHiddenFrames, false, \
2461 "show method handle implementation frames (usually hidden)") \
2462 \
2463 experimental(bool, TrustFinalNonStaticFields, false, \
2464 "trust final non-static declarations for constant folding") \
2465 \
2466 diagnostic(bool, FoldStableValues, true, \
2467 "Optimize loads from stable fields (marked w/ @Stable)") \
2468 \
2469 develop(bool, TraceInvokeDynamic, false, \
2470 "trace internal invoke dynamic operations") \
2471 \
2472 diagnostic(int, UseBootstrapCallInfo, 1, \
2473 "0: when resolving InDy or ConDy, force all BSM arguments to be " \
2474 "resolved before the bootstrap method is called; 1: when a BSM " \
2475 "that may accept a BootstrapCallInfo is detected, use that API " \
2476 "to pass BSM arguments, which allows the BSM to delay their " \
2477 "resolution; 2+: stress test the BCI API by calling more BSMs " \
2478 "via that API, instead of with the eagerly-resolved array.") \
2479 \
2480 diagnostic(bool, PauseAtStartup, false, \
2481 "Causes the VM to pause at startup time and wait for the pause " \
2482 "file to be removed (default: ./vm.paused.<pid>)") \
2483 \
2484 diagnostic(ccstr, PauseAtStartupFile, NULL, \
2485 "The file to create and for whose removal to await when pausing " \
2486 "at startup. (default: ./vm.paused.<pid>)") \
2487 \
2488 diagnostic(bool, PauseAtExit, false, \
2489 "Pause and wait for keypress on exit if a debugger is attached") \
2490 \
2491 product(bool, ExtendedDTraceProbes, false, \
2492 "Enable performance-impacting dtrace probes") \
2493 \
2494 product(bool, DTraceMethodProbes, false, \
2495 "Enable dtrace probes for method-entry and method-exit") \
2496 \
2497 product(bool, DTraceAllocProbes, false, \
2498 "Enable dtrace probes for object allocation") \
2499 \
2500 product(bool, DTraceMonitorProbes, false, \
2501 "Enable dtrace probes for monitor events") \
2502 \
2503 product(bool, RelaxAccessControlCheck, false, \
2504 "Relax the access control checks in the verifier") \
2505 \
2506 product(uintx, StringTableSize, defaultStringTableSize, \
2507 "Number of buckets in the interned String table " \
2508 "(will be rounded to nearest higher power of 2)") \
2509 range(minimumStringTableSize, 16777216ul) \
2510 \
2511 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \
2512 "Number of buckets in the JVM internal Symbol table") \
2513 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \
2514 \
2515 product(bool, UseStringDeduplication, false, \
2516 "Use string deduplication") \
2517 \
2518 product(uintx, StringDeduplicationAgeThreshold, 3, \
2519 "A string must reach this age (or be promoted to an old region) " \
2520 "to be considered for deduplication") \
2521 range(1, markOopDesc::max_age) \
2522 \
2523 diagnostic(bool, StringDeduplicationResizeALot, false, \
2524 "Force table resize every time the table is scanned") \
2525 \
2526 diagnostic(bool, StringDeduplicationRehashALot, false, \
2527 "Force table rehash every time the table is scanned") \
2528 \
2529 diagnostic(bool, WhiteBoxAPI, false, \
2530 "Enable internal testing APIs") \
2531 \
2532 experimental(intx, SurvivorAlignmentInBytes, 0, \
2533 "Default survivor space alignment in bytes") \
2534 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \
2535 \
2536 product(ccstr, DumpLoadedClassList, NULL, \
2537 "Dump the names all loaded classes, that could be stored into " \
2538 "the CDS archive, in the specified file") \
2539 \
2540 product(ccstr, SharedClassListFile, NULL, \
2541 "Override the default CDS class list") \
2542 \
2543 product(ccstr, SharedArchiveFile, NULL, \
2544 "Override the default location of the CDS archive file") \
2545 \
2546 product(ccstr, ExtraSharedClassListFile, NULL, \
2547 "Extra classlist for building the CDS archive file") \
2548 \
2549 experimental(size_t, ArrayAllocatorMallocLimit, \
2550 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \
2551 "Allocation less than this value will be allocated " \
2552 "using malloc. Larger allocations will use mmap.") \
2553 \
2554 experimental(bool, AlwaysAtomicAccesses, false, \
2555 "Accesses to all variables should always be atomic") \
2556 \
2557 diagnostic(bool, UseUnalignedAccesses, false, \
2558 "Use unaligned memory accesses in Unsafe") \
2559 \
2560 product_pd(bool, PreserveFramePointer, \
2561 "Use the FP register for holding the frame pointer " \
2562 "and not as a general purpose register.") \
2563 \
2564 diagnostic(bool, CheckIntrinsics, true, \
2565 "When a class C is loaded, check that " \
2566 "(1) all intrinsics defined by the VM for class C are present "\
2567 "in the loaded class file and are marked with the " \
2568 "@HotSpotIntrinsicCandidate annotation, that " \
2569 "(2) there is an intrinsic registered for all loaded methods " \
2570 "that are annotated with the @HotSpotIntrinsicCandidate " \
2571 "annotation, and that " \
2572 "(3) no orphan methods exist for class C (i.e., methods for " \
2573 "which the VM declares an intrinsic but that are not declared "\
2574 "in the loaded class C. " \
2575 "Check (3) is available only in debug builds.") \
2576 \
2577 diagnostic_pd(intx, InitArrayShortSize, \
2578 "Threshold small size (in bytes) for clearing arrays. " \
2579 "Anything this size or smaller may get converted to discrete " \
2580 "scalar stores.") \
2581 range(0, max_intx) \
2582 constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \
2583 \
2584 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \
2585 "Disable backwards compatibility for compile commands.") \
2586 \
2587 diagnostic(bool, CompilerDirectivesPrint, false, \
2588 "Print compiler directives on installation.") \
2589 diagnostic(int, CompilerDirectivesLimit, 50, \
2590 "Limit on number of compiler directives.") \
2591 \
2592 product(ccstr, AllocateHeapAt, NULL, \
2593 "Path to the directoy where a temporary file will be created " \
2594 "to use as the backing store for Java Heap.") \
2595 \
2596 develop(bool, VerifyMetaspace, false, \
2597 "Verify metaspace on chunk movements.") \
2598 \
2599 diagnostic(bool, ShowRegistersOnAssert, false, \
2600 "On internal errors, include registers in error report.") \
2601 \
2602 experimental(bool, UseSwitchProfiling, true, \
2603 "leverage profiling for table/lookup switch") \
2604 \
2605 JFR_ONLY(product(bool, FlightRecorder, false, \
2606 "Enable Flight Recorder")) \
2607 \
2608 JFR_ONLY(product(ccstr, FlightRecorderOptions, NULL, \
2609 "Flight Recorder options")) \
2610 \
2611 JFR_ONLY(product(ccstr, StartFlightRecording, NULL, \
2612 "Start flight recording with options")) \
2613 \
2614 experimental(bool, UseFastUnorderedTimeStamps, false, \
2615 "Use platform unstable time where supported for timestamps only")
2616
2617 #define VM_FLAGS(develop, \
2618 develop_pd, \
2619 product, \
2620 product_pd, \
2621 diagnostic, \
2622 diagnostic_pd, \
2623 experimental, \
2624 notproduct, \
2625 manageable, \
2626 product_rw, \
2627 lp64_product, \
2628 range, \
2629 constraint, \
2630 writeable) \
2631 \
2632 RUNTIME_FLAGS( \
2633 develop, \
2634 develop_pd, \
2635 product, \
2636 product_pd, \
2637 diagnostic, \
2638 diagnostic_pd, \
2639 experimental, \
2640 notproduct, \
2641 manageable, \
2642 product_rw, \
2643 lp64_product, \
2644 range, \
2645 constraint, \
2646 writeable) \
2647 \
2648 GC_FLAGS( \
2649 develop, \
2650 develop_pd, \
2651 product, \
2652 product_pd, \
2653 diagnostic, \
2654 diagnostic_pd, \
2655 experimental, \
2656 notproduct, \
2657 manageable, \
2658 product_rw, \
2659 lp64_product, \
2660 range, \
2661 constraint, \
2662 writeable) \
2663
2664 /*
2665 * Macros for factoring of globals
2666 */
2667
2668 // Interface macros
2669 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
2670 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
2671 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
2672 #define DECLARE_PD_DIAGNOSTIC_FLAG(type, name, doc) extern "C" type name;
2673 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
2674 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
2675 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
2676 #ifdef PRODUCT
2677 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value;
2678 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name;
2679 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value;
2680 #else
2681 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
2682 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
2683 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
2684 #endif // PRODUCT
2685 // Special LP64 flags, product only needed for now.
2686 #ifdef _LP64
2687 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
2688 #else
2689 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
2690 #endif // _LP64
2691
2692 // Implementation macros
2693 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
2694 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
2695 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
2696 #define MATERIALIZE_PD_DIAGNOSTIC_FLAG(type, name, doc) type name = pd_##name;
2697 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
2698 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
2699 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
2700 #ifdef PRODUCT
2701 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)
2702 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)
2703 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
2704 #else
2705 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
2706 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
2707 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
2708 #endif // PRODUCT
2709 #ifdef _LP64
2710 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
2711 #else
2712 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
2713 #endif // _LP64
2714
2715 // Only materialize src code for range checking when required, ignore otherwise
2716 #define IGNORE_RANGE(a, b)
2717 // Only materialize src code for contraint checking when required, ignore otherwise
2718 #define IGNORE_CONSTRAINT(func,type)
2719
2720 #define IGNORE_WRITEABLE(type)
2721
2722 VM_FLAGS(DECLARE_DEVELOPER_FLAG, \
2723 DECLARE_PD_DEVELOPER_FLAG, \
2724 DECLARE_PRODUCT_FLAG, \
2725 DECLARE_PD_PRODUCT_FLAG, \
2726 DECLARE_DIAGNOSTIC_FLAG, \
2727 DECLARE_PD_DIAGNOSTIC_FLAG, \
2728 DECLARE_EXPERIMENTAL_FLAG, \
2729 DECLARE_NOTPRODUCT_FLAG, \
2730 DECLARE_MANAGEABLE_FLAG, \
2731 DECLARE_PRODUCT_RW_FLAG, \
2732 DECLARE_LP64_PRODUCT_FLAG, \
2733 IGNORE_RANGE, \
2734 IGNORE_CONSTRAINT, \
2735 IGNORE_WRITEABLE)
2736
2737 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \
2738 DECLARE_PD_DEVELOPER_FLAG, \
2739 DECLARE_PRODUCT_FLAG, \
2740 DECLARE_PD_PRODUCT_FLAG, \
2741 DECLARE_DIAGNOSTIC_FLAG, \
2742 DECLARE_PD_DIAGNOSTIC_FLAG, \
2743 DECLARE_NOTPRODUCT_FLAG, \
2744 IGNORE_RANGE, \
2745 IGNORE_CONSTRAINT, \
2746 IGNORE_WRITEABLE)
2747
2748 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \
2749 DECLARE_PRODUCT_FLAG, \
2750 DECLARE_DIAGNOSTIC_FLAG, \
2751 DECLARE_EXPERIMENTAL_FLAG, \
2752 DECLARE_NOTPRODUCT_FLAG, \
2753 IGNORE_RANGE, \
2754 IGNORE_CONSTRAINT, \
2755 IGNORE_WRITEABLE)
2756
2757 // Extensions
2758
2759 #include "runtime/globals_ext.hpp"
2760
2761 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP
--- EOF ---