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src/share/vm/runtime/globals.hpp@81f7362f7bed
src/share/vm/runtime/globals.hpp
Thu, 08 Dec 2011 10:27:33 -0800
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- kvn
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- Thu, 08 Dec 2011 10:27:33 -0800
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1 /*
2 * Copyright (c) 1997, 2011, 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 */
25 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
26 #define SHARE_VM_RUNTIME_GLOBALS_HPP
28 #include "utilities/debug.hpp"
29 #ifdef TARGET_ARCH_x86
30 # include "globals_x86.hpp"
31 #endif
32 #ifdef TARGET_ARCH_sparc
33 # include "globals_sparc.hpp"
34 #endif
35 #ifdef TARGET_ARCH_zero
36 # include "globals_zero.hpp"
37 #endif
38 #ifdef TARGET_ARCH_arm
39 # include "globals_arm.hpp"
40 #endif
41 #ifdef TARGET_ARCH_ppc
42 # include "globals_ppc.hpp"
43 #endif
44 #ifdef TARGET_OS_FAMILY_linux
45 # include "globals_linux.hpp"
46 #endif
47 #ifdef TARGET_OS_FAMILY_solaris
48 # include "globals_solaris.hpp"
49 #endif
50 #ifdef TARGET_OS_FAMILY_windows
51 # include "globals_windows.hpp"
52 #endif
53 #ifdef TARGET_OS_FAMILY_bsd
54 # include "globals_bsd.hpp"
55 #endif
56 #ifdef TARGET_OS_ARCH_linux_x86
57 # include "globals_linux_x86.hpp"
58 #endif
59 #ifdef TARGET_OS_ARCH_linux_sparc
60 # include "globals_linux_sparc.hpp"
61 #endif
62 #ifdef TARGET_OS_ARCH_linux_zero
63 # include "globals_linux_zero.hpp"
64 #endif
65 #ifdef TARGET_OS_ARCH_solaris_x86
66 # include "globals_solaris_x86.hpp"
67 #endif
68 #ifdef TARGET_OS_ARCH_solaris_sparc
69 # include "globals_solaris_sparc.hpp"
70 #endif
71 #ifdef TARGET_OS_ARCH_windows_x86
72 # include "globals_windows_x86.hpp"
73 #endif
74 #ifdef TARGET_OS_ARCH_linux_arm
75 # include "globals_linux_arm.hpp"
76 #endif
77 #ifdef TARGET_OS_ARCH_linux_ppc
78 # include "globals_linux_ppc.hpp"
79 #endif
80 #ifdef TARGET_OS_ARCH_bsd_x86
81 # include "globals_bsd_x86.hpp"
82 #endif
83 #ifdef TARGET_OS_ARCH_bsd_zero
84 # include "globals_bsd_zero.hpp"
85 #endif
86 #ifdef COMPILER1
87 #ifdef TARGET_ARCH_x86
88 # include "c1_globals_x86.hpp"
89 #endif
90 #ifdef TARGET_ARCH_sparc
91 # include "c1_globals_sparc.hpp"
92 #endif
93 #ifdef TARGET_ARCH_arm
94 # include "c1_globals_arm.hpp"
95 #endif
96 #ifdef TARGET_ARCH_ppc
97 # include "c1_globals_ppc.hpp"
98 #endif
99 #ifdef TARGET_OS_FAMILY_linux
100 # include "c1_globals_linux.hpp"
101 #endif
102 #ifdef TARGET_OS_FAMILY_solaris
103 # include "c1_globals_solaris.hpp"
104 #endif
105 #ifdef TARGET_OS_FAMILY_windows
106 # include "c1_globals_windows.hpp"
107 #endif
108 #ifdef TARGET_OS_FAMILY_bsd
109 # include "c1_globals_bsd.hpp"
110 #endif
111 #endif
112 #ifdef COMPILER2
113 #ifdef TARGET_ARCH_x86
114 # include "c2_globals_x86.hpp"
115 #endif
116 #ifdef TARGET_ARCH_sparc
117 # include "c2_globals_sparc.hpp"
118 #endif
119 #ifdef TARGET_ARCH_arm
120 # include "c2_globals_arm.hpp"
121 #endif
122 #ifdef TARGET_OS_FAMILY_linux
123 # include "c2_globals_linux.hpp"
124 #endif
125 #ifdef TARGET_OS_FAMILY_solaris
126 # include "c2_globals_solaris.hpp"
127 #endif
128 #ifdef TARGET_OS_FAMILY_windows
129 # include "c2_globals_windows.hpp"
130 #endif
131 #ifdef TARGET_OS_FAMILY_bsd
132 # include "c2_globals_bsd.hpp"
133 #endif
134 #endif
135 #ifdef SHARK
136 #ifdef TARGET_ARCH_zero
137 # include "shark_globals_zero.hpp"
138 #endif
139 #endif
141 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
142 define_pd_global(bool, BackgroundCompilation, false);
143 define_pd_global(bool, UseTLAB, false);
144 define_pd_global(bool, CICompileOSR, false);
145 define_pd_global(bool, UseTypeProfile, false);
146 define_pd_global(bool, UseOnStackReplacement, false);
147 define_pd_global(bool, InlineIntrinsics, false);
148 define_pd_global(bool, PreferInterpreterNativeStubs, true);
149 define_pd_global(bool, ProfileInterpreter, false);
150 define_pd_global(bool, ProfileTraps, false);
151 define_pd_global(bool, TieredCompilation, false);
153 define_pd_global(intx, CompileThreshold, 0);
154 define_pd_global(intx, BackEdgeThreshold, 0);
156 define_pd_global(intx, OnStackReplacePercentage, 0);
157 define_pd_global(bool, ResizeTLAB, false);
158 define_pd_global(intx, FreqInlineSize, 0);
159 define_pd_global(intx, InlineSmallCode, 0);
160 define_pd_global(intx, NewSizeThreadIncrease, 4*K);
161 define_pd_global(intx, InlineClassNatives, true);
162 define_pd_global(intx, InlineUnsafeOps, true);
163 define_pd_global(intx, InitialCodeCacheSize, 160*K);
164 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
165 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
166 define_pd_global(intx, CodeCacheMinBlockLength, 1);
167 define_pd_global(uintx,PermSize, ScaleForWordSize(4*M));
168 define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M));
169 define_pd_global(bool, NeverActAsServerClassMachine, true);
170 define_pd_global(uint64_t,MaxRAM, 1ULL*G);
171 #define CI_COMPILER_COUNT 0
172 #else
174 #ifdef COMPILER2
175 #define CI_COMPILER_COUNT 2
176 #else
177 #define CI_COMPILER_COUNT 1
178 #endif // COMPILER2
180 #endif // no compilers
183 // string type aliases used only in this file
184 typedef const char* ccstr;
185 typedef const char* ccstrlist; // represents string arguments which accumulate
187 enum FlagValueOrigin {
188 DEFAULT = 0,
189 COMMAND_LINE = 1,
190 ENVIRON_VAR = 2,
191 CONFIG_FILE = 3,
192 MANAGEMENT = 4,
193 ERGONOMIC = 5,
194 ATTACH_ON_DEMAND = 6,
195 INTERNAL = 99
196 };
198 struct Flag {
199 const char *type;
200 const char *name;
201 void* addr;
203 NOT_PRODUCT(const char *doc;)
205 const char *kind;
206 FlagValueOrigin origin;
208 // points to all Flags static array
209 static Flag *flags;
211 // number of flags
212 static size_t numFlags;
214 static Flag* find_flag(char* name, size_t length);
216 bool is_bool() const { return strcmp(type, "bool") == 0; }
217 bool get_bool() const { return *((bool*) addr); }
218 void set_bool(bool value) { *((bool*) addr) = value; }
220 bool is_intx() const { return strcmp(type, "intx") == 0; }
221 intx get_intx() const { return *((intx*) addr); }
222 void set_intx(intx value) { *((intx*) addr) = value; }
224 bool is_uintx() const { return strcmp(type, "uintx") == 0; }
225 uintx get_uintx() const { return *((uintx*) addr); }
226 void set_uintx(uintx value) { *((uintx*) addr) = value; }
228 bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; }
229 uint64_t get_uint64_t() const { return *((uint64_t*) addr); }
230 void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; }
232 bool is_double() const { return strcmp(type, "double") == 0; }
233 double get_double() const { return *((double*) addr); }
234 void set_double(double value) { *((double*) addr) = value; }
236 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; }
237 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; }
238 ccstr get_ccstr() const { return *((ccstr*) addr); }
239 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; }
241 bool is_unlocker() const;
242 bool is_unlocked() const;
243 bool is_writeable() const;
244 bool is_external() const;
246 bool is_unlocker_ext() const;
247 bool is_unlocked_ext() const;
249 void print_on(outputStream* st, bool withComments = false );
250 void print_as_flag(outputStream* st);
251 };
253 // debug flags control various aspects of the VM and are global accessible
255 // use FlagSetting to temporarily change some debug flag
256 // e.g. FlagSetting fs(DebugThisAndThat, true);
257 // restored to previous value upon leaving scope
258 class FlagSetting {
259 bool val;
260 bool* flag;
261 public:
262 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
263 ~FlagSetting() { *flag = val; }
264 };
267 class CounterSetting {
268 intx* counter;
269 public:
270 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
271 ~CounterSetting() { (*counter)--; }
272 };
275 class IntFlagSetting {
276 intx val;
277 intx* flag;
278 public:
279 IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; }
280 ~IntFlagSetting() { *flag = val; }
281 };
284 class DoubleFlagSetting {
285 double val;
286 double* flag;
287 public:
288 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
289 ~DoubleFlagSetting() { *flag = val; }
290 };
293 class CommandLineFlags {
294 public:
295 static bool boolAt(char* name, size_t len, bool* value);
296 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); }
297 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin);
298 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); }
300 static bool intxAt(char* name, size_t len, intx* value);
301 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); }
302 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin);
303 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); }
305 static bool uintxAt(char* name, size_t len, uintx* value);
306 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
307 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin);
308 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); }
310 static bool uint64_tAt(char* name, size_t len, uint64_t* value);
311 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
312 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin);
313 static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
315 static bool doubleAt(char* name, size_t len, double* value);
316 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); }
317 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin);
318 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); }
320 static bool ccstrAt(char* name, size_t len, ccstr* value);
321 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
322 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin);
323 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); }
325 // Returns false if name is not a command line flag.
326 static bool wasSetOnCmdline(const char* name, bool* value);
327 static void printSetFlags();
329 static void printFlags(bool withComments = false );
331 static void verify() PRODUCT_RETURN;
332 };
334 // use this for flags that are true by default in the debug version but
335 // false in the optimized version, and vice versa
336 #ifdef ASSERT
337 #define trueInDebug true
338 #define falseInDebug false
339 #else
340 #define trueInDebug false
341 #define falseInDebug true
342 #endif
344 // use this for flags that are true per default in the product build
345 // but false in development builds, and vice versa
346 #ifdef PRODUCT
347 #define trueInProduct true
348 #define falseInProduct false
349 #else
350 #define trueInProduct false
351 #define falseInProduct true
352 #endif
354 // use this for flags that are true per default in the tiered build
355 // but false in non-tiered builds, and vice versa
356 #ifdef TIERED
357 #define trueInTiered true
358 #define falseInTiered false
359 #else
360 #define trueInTiered false
361 #define falseInTiered true
362 #endif
364 #ifdef JAVASE_EMBEDDED
365 #define falseInEmbedded false
366 #else
367 #define falseInEmbedded true
368 #endif
370 // develop flags are settable / visible only during development and are constant in the PRODUCT version
371 // product flags are always settable / visible
372 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
374 // A flag must be declared with one of the following types:
375 // bool, intx, uintx, ccstr.
376 // The type "ccstr" is an alias for "const char*" and is used
377 // only in this file, because the macrology requires single-token type names.
379 // Note: Diagnostic options not meant for VM tuning or for product modes.
380 // They are to be used for VM quality assurance or field diagnosis
381 // of VM bugs. They are hidden so that users will not be encouraged to
382 // try them as if they were VM ordinary execution options. However, they
383 // are available in the product version of the VM. Under instruction
384 // from support engineers, VM customers can turn them on to collect
385 // diagnostic information about VM problems. To use a VM diagnostic
386 // option, you must first specify +UnlockDiagnosticVMOptions.
387 // (This master switch also affects the behavior of -Xprintflags.)
388 //
389 // experimental flags are in support of features that are not
390 // part of the officially supported product, but are available
391 // for experimenting with. They could, for example, be performance
392 // features that may not have undergone full or rigorous QA, but which may
393 // help performance in some cases and released for experimentation
394 // by the community of users and developers. This flag also allows one to
395 // be able to build a fully supported product that nonetheless also
396 // ships with some unsupported, lightly tested, experimental features.
397 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
398 // UnlockExperimentalVMOptions flag, which allows the control and
399 // modification of the experimental flags.
400 //
401 // Nota bene: neither diagnostic nor experimental options should be used casually,
402 // and they are not supported on production loads, except under explicit
403 // direction from support engineers.
404 //
405 // manageable flags are writeable external product flags.
406 // They are dynamically writeable through the JDK management interface
407 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
408 // These flags are external exported interface (see CCC). The list of
409 // manageable flags can be queried programmatically through the management
410 // interface.
411 //
412 // A flag can be made as "manageable" only if
413 // - the flag is defined in a CCC as an external exported interface.
414 // - the VM implementation supports dynamic setting of the flag.
415 // This implies that the VM must *always* query the flag variable
416 // and not reuse state related to the flag state at any given time.
417 // - you want the flag to be queried programmatically by the customers.
418 //
419 // product_rw flags are writeable internal product flags.
420 // They are like "manageable" flags but for internal/private use.
421 // The list of product_rw flags are internal/private flags which
422 // may be changed/removed in a future release. It can be set
423 // through the management interface to get/set value
424 // when the name of flag is supplied.
425 //
426 // A flag can be made as "product_rw" only if
427 // - the VM implementation supports dynamic setting of the flag.
428 // This implies that the VM must *always* query the flag variable
429 // and not reuse state related to the flag state at any given time.
430 //
431 // Note that when there is a need to support develop flags to be writeable,
432 // it can be done in the same way as product_rw.
434 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
435 \
436 lp64_product(bool, UseCompressedOops, false, \
437 "Use 32-bit object references in 64-bit VM. " \
438 "lp64_product means flag is always constant in 32 bit VM") \
439 \
440 notproduct(bool, CheckCompressedOops, true, \
441 "generate checks in encoding/decoding code in debug VM") \
442 \
443 product_pd(uintx, HeapBaseMinAddress, \
444 "OS specific low limit for heap base address") \
445 \
446 diagnostic(bool, PrintCompressedOopsMode, false, \
447 "Print compressed oops base address and encoding mode") \
448 \
449 lp64_product(intx, ObjectAlignmentInBytes, 8, \
450 "Default object alignment in bytes, 8 is minimum") \
451 \
452 /* UseMembar is theoretically a temp flag used for memory barrier \
453 * removal testing. It was supposed to be removed before FCS but has \
454 * been re-added (see 6401008) */ \
455 product_pd(bool, UseMembar, \
456 "(Unstable) Issues membars on thread state transitions") \
457 \
458 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \
459 * that don't support it. This will be replaced by processor detection \
460 * logic. \
461 */ \
462 product(bool, UsePPCLWSYNC, true, \
463 "Use lwsync instruction if true, else use slower sync") \
464 \
465 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
466 "Whether to clean the chunk pool asynchronously") \
467 \
468 /* Temporary: See 6948537 */ \
469 experimental(bool, UseMemSetInBOT, true, \
470 "(Unstable) uses memset in BOT updates in GC code") \
471 \
472 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
473 "Enable normal processing of flags relating to field diagnostics")\
474 \
475 experimental(bool, UnlockExperimentalVMOptions, false, \
476 "Enable normal processing of flags relating to experimental features")\
477 \
478 product(bool, JavaMonitorsInStackTrace, true, \
479 "Print info. about Java monitor locks when the stacks are dumped")\
480 \
481 product_pd(bool, UseLargePages, \
482 "Use large page memory") \
483 \
484 product_pd(bool, UseLargePagesIndividualAllocation, \
485 "Allocate large pages individually for better affinity") \
486 \
487 develop(bool, LargePagesIndividualAllocationInjectError, false, \
488 "Fail large pages individual allocation") \
489 \
490 develop(bool, TracePageSizes, false, \
491 "Trace page size selection and usage.") \
492 \
493 product(bool, UseNUMA, false, \
494 "Use NUMA if available") \
495 \
496 product(bool, UseNUMAInterleaving, false, \
497 "Interleave memory across NUMA nodes if available") \
498 \
499 product(uintx, NUMAInterleaveGranularity, 2*M, \
500 "Granularity to use for NUMA interleaving on Windows OS") \
501 \
502 product(bool, ForceNUMA, false, \
503 "Force NUMA optimizations on single-node/UMA systems") \
504 \
505 product(intx, NUMAChunkResizeWeight, 20, \
506 "Percentage (0-100) used to weight the current sample when " \
507 "computing exponentially decaying average for " \
508 "AdaptiveNUMAChunkSizing") \
509 \
510 product(intx, NUMASpaceResizeRate, 1*G, \
511 "Do not reallocate more that this amount per collection") \
512 \
513 product(bool, UseAdaptiveNUMAChunkSizing, true, \
514 "Enable adaptive chunk sizing for NUMA") \
515 \
516 product(bool, NUMAStats, false, \
517 "Print NUMA stats in detailed heap information") \
518 \
519 product(intx, NUMAPageScanRate, 256, \
520 "Maximum number of pages to include in the page scan procedure") \
521 \
522 product_pd(bool, NeedsDeoptSuspend, \
523 "True for register window machines (sparc/ia64)") \
524 \
525 product(intx, UseSSE, 99, \
526 "Highest supported SSE instructions set on x86/x64") \
527 \
528 product(intx, UseVIS, 99, \
529 "Highest supported VIS instructions set on Sparc") \
530 \
531 product(uintx, LargePageSizeInBytes, 0, \
532 "Large page size (0 to let VM choose the page size") \
533 \
534 product(uintx, LargePageHeapSizeThreshold, 128*M, \
535 "Use large pages if max heap is at least this big") \
536 \
537 product(bool, ForceTimeHighResolution, false, \
538 "Using high time resolution(For Win32 only)") \
539 \
540 develop(bool, TraceItables, false, \
541 "Trace initialization and use of itables") \
542 \
543 develop(bool, TracePcPatching, false, \
544 "Trace usage of frame::patch_pc") \
545 \
546 develop(bool, TraceJumps, false, \
547 "Trace assembly jumps in thread ring buffer") \
548 \
549 develop(bool, TraceRelocator, false, \
550 "Trace the bytecode relocator") \
551 \
552 develop(bool, TraceLongCompiles, false, \
553 "Print out every time compilation is longer than " \
554 "a given threashold") \
555 \
556 develop(bool, SafepointALot, false, \
557 "Generates a lot of safepoints. Works with " \
558 "GuaranteedSafepointInterval") \
559 \
560 product_pd(bool, BackgroundCompilation, \
561 "A thread requesting compilation is not blocked during " \
562 "compilation") \
563 \
564 product(bool, PrintVMQWaitTime, false, \
565 "Prints out the waiting time in VM operation queue") \
566 \
567 develop(bool, BailoutToInterpreterForThrows, false, \
568 "Compiled methods which throws/catches exceptions will be " \
569 "deopt and intp.") \
570 \
571 develop(bool, NoYieldsInMicrolock, false, \
572 "Disable yields in microlock") \
573 \
574 develop(bool, TraceOopMapGeneration, false, \
575 "Shows oopmap generation") \
576 \
577 product(bool, MethodFlushing, true, \
578 "Reclamation of zombie and not-entrant methods") \
579 \
580 develop(bool, VerifyStack, false, \
581 "Verify stack of each thread when it is entering a runtime call") \
582 \
583 diagnostic(bool, ForceUnreachable, false, \
584 "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \
585 \
586 notproduct(bool, StressDerivedPointers, false, \
587 "Force scavenge when a derived pointers is detected on stack " \
588 "after rtm call") \
589 \
590 develop(bool, TraceDerivedPointers, false, \
591 "Trace traversal of derived pointers on stack") \
592 \
593 notproduct(bool, TraceCodeBlobStacks, false, \
594 "Trace stack-walk of codeblobs") \
595 \
596 product(bool, PrintJNIResolving, false, \
597 "Used to implement -v:jni") \
598 \
599 notproduct(bool, PrintRewrites, false, \
600 "Print methods that are being rewritten") \
601 \
602 product(bool, UseInlineCaches, true, \
603 "Use Inline Caches for virtual calls ") \
604 \
605 develop(bool, InlineArrayCopy, true, \
606 "inline arraycopy native that is known to be part of " \
607 "base library DLL") \
608 \
609 develop(bool, InlineObjectHash, true, \
610 "inline Object::hashCode() native that is known to be part " \
611 "of base library DLL") \
612 \
613 develop(bool, InlineObjectCopy, true, \
614 "inline Object.clone and Arrays.copyOf[Range] intrinsics") \
615 \
616 develop(bool, InlineNatives, true, \
617 "inline natives that are known to be part of base library DLL") \
618 \
619 develop(bool, InlineMathNatives, true, \
620 "inline SinD, CosD, etc.") \
621 \
622 develop(bool, InlineClassNatives, true, \
623 "inline Class.isInstance, etc") \
624 \
625 develop(bool, InlineAtomicLong, true, \
626 "inline sun.misc.AtomicLong") \
627 \
628 develop(bool, InlineThreadNatives, true, \
629 "inline Thread.currentThread, etc") \
630 \
631 develop(bool, InlineReflectionGetCallerClass, true, \
632 "inline sun.reflect.Reflection.getCallerClass(), known to be part "\
633 "of base library DLL") \
634 \
635 develop(bool, InlineUnsafeOps, true, \
636 "inline memory ops (native methods) from sun.misc.Unsafe") \
637 \
638 develop(bool, ConvertCmpD2CmpF, true, \
639 "Convert cmpD to cmpF when one input is constant in float range") \
640 \
641 develop(bool, ConvertFloat2IntClipping, true, \
642 "Convert float2int clipping idiom to integer clipping") \
643 \
644 develop(bool, SpecialStringCompareTo, true, \
645 "special version of string compareTo") \
646 \
647 develop(bool, SpecialStringIndexOf, true, \
648 "special version of string indexOf") \
649 \
650 develop(bool, SpecialStringEquals, true, \
651 "special version of string equals") \
652 \
653 develop(bool, SpecialArraysEquals, true, \
654 "special version of Arrays.equals(char[],char[])") \
655 \
656 product(bool, UseSSE42Intrinsics, false, \
657 "SSE4.2 versions of intrinsics") \
658 \
659 product(bool, UseCondCardMark, false, \
660 "Check for already marked card before updating card table") \
661 \
662 develop(bool, TraceCallFixup, false, \
663 "traces all call fixups") \
664 \
665 develop(bool, DeoptimizeALot, false, \
666 "deoptimize at every exit from the runtime system") \
667 \
668 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
669 "a comma separated list of bcis to deoptimize at") \
670 \
671 product(bool, DeoptimizeRandom, false, \
672 "deoptimize random frames on random exit from the runtime system")\
673 \
674 notproduct(bool, ZombieALot, false, \
675 "creates zombies (non-entrant) at exit from the runt. system") \
676 \
677 product(bool, UnlinkSymbolsALot, false, \
678 "unlink unreferenced symbols from the symbol table at safepoints")\
679 \
680 notproduct(bool, WalkStackALot, false, \
681 "trace stack (no print) at every exit from the runtime system") \
682 \
683 product(bool, Debugging, false, \
684 "set when executing debug methods in debug.ccp " \
685 "(to prevent triggering assertions)") \
686 \
687 notproduct(bool, StrictSafepointChecks, trueInDebug, \
688 "Enable strict checks that safepoints cannot happen for threads " \
689 "that used No_Safepoint_Verifier") \
690 \
691 notproduct(bool, VerifyLastFrame, false, \
692 "Verify oops on last frame on entry to VM") \
693 \
694 develop(bool, TraceHandleAllocation, false, \
695 "Prints out warnings when suspicious many handles are allocated") \
696 \
697 product(bool, UseCompilerSafepoints, true, \
698 "Stop at safepoints in compiled code") \
699 \
700 product(bool, UseSplitVerifier, true, \
701 "use split verifier with StackMapTable attributes") \
702 \
703 product(bool, FailOverToOldVerifier, true, \
704 "fail over to old verifier when split verifier fails") \
705 \
706 develop(bool, ShowSafepointMsgs, false, \
707 "Show msg. about safepoint synch.") \
708 \
709 product(bool, SafepointTimeout, false, \
710 "Time out and warn or fail after SafepointTimeoutDelay " \
711 "milliseconds if failed to reach safepoint") \
712 \
713 develop(bool, DieOnSafepointTimeout, false, \
714 "Die upon failure to reach safepoint (see SafepointTimeout)") \
715 \
716 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
717 /* typically, at most a few retries are needed */ \
718 product(intx, SuspendRetryCount, 50, \
719 "Maximum retry count for an external suspend request") \
720 \
721 product(intx, SuspendRetryDelay, 5, \
722 "Milliseconds to delay per retry (* current_retry_count)") \
723 \
724 product(bool, AssertOnSuspendWaitFailure, false, \
725 "Assert/Guarantee on external suspend wait failure") \
726 \
727 product(bool, TraceSuspendWaitFailures, false, \
728 "Trace external suspend wait failures") \
729 \
730 product(bool, MaxFDLimit, true, \
731 "Bump the number of file descriptors to max in solaris.") \
732 \
733 notproduct(bool, LogEvents, trueInDebug, \
734 "Enable Event log") \
735 \
736 product(bool, BytecodeVerificationRemote, true, \
737 "Enables the Java bytecode verifier for remote classes") \
738 \
739 product(bool, BytecodeVerificationLocal, false, \
740 "Enables the Java bytecode verifier for local classes") \
741 \
742 develop(bool, ForceFloatExceptions, trueInDebug, \
743 "Force exceptions on FP stack under/overflow") \
744 \
745 develop(bool, SoftMatchFailure, trueInProduct, \
746 "If the DFA fails to match a node, print a message and bail out") \
747 \
748 develop(bool, VerifyStackAtCalls, false, \
749 "Verify that the stack pointer is unchanged after calls") \
750 \
751 develop(bool, TraceJavaAssertions, false, \
752 "Trace java language assertions") \
753 \
754 notproduct(bool, CheckAssertionStatusDirectives, false, \
755 "temporary - see javaClasses.cpp") \
756 \
757 notproduct(bool, PrintMallocFree, false, \
758 "Trace calls to C heap malloc/free allocation") \
759 \
760 product(bool, PrintOopAddress, false, \
761 "Always print the location of the oop") \
762 \
763 notproduct(bool, VerifyCodeCacheOften, false, \
764 "Verify compiled-code cache often") \
765 \
766 develop(bool, ZapDeadCompiledLocals, false, \
767 "Zap dead locals in compiler frames") \
768 \
769 notproduct(bool, ZapDeadLocalsOld, false, \
770 "Zap dead locals (old version, zaps all frames when " \
771 "entering the VM") \
772 \
773 notproduct(bool, CheckOopishValues, false, \
774 "Warn if value contains oop ( requires ZapDeadLocals)") \
775 \
776 develop(bool, UseMallocOnly, false, \
777 "use only malloc/free for allocation (no resource area/arena)") \
778 \
779 develop(bool, PrintMalloc, false, \
780 "print all malloc/free calls") \
781 \
782 develop(bool, PrintMallocStatistics, false, \
783 "print malloc/free statistics") \
784 \
785 develop(bool, ZapResourceArea, trueInDebug, \
786 "Zap freed resource/arena space with 0xABABABAB") \
787 \
788 notproduct(bool, ZapVMHandleArea, trueInDebug, \
789 "Zap freed VM handle space with 0xBCBCBCBC") \
790 \
791 develop(bool, ZapJNIHandleArea, trueInDebug, \
792 "Zap freed JNI handle space with 0xFEFEFEFE") \
793 \
794 notproduct(bool, ZapStackSegments, trueInDebug, \
795 "Zap allocated/freed Stack segments with 0xFADFADED") \
796 \
797 develop(bool, ZapUnusedHeapArea, trueInDebug, \
798 "Zap unused heap space with 0xBAADBABE") \
799 \
800 develop(bool, TraceZapUnusedHeapArea, false, \
801 "Trace zapping of unused heap space") \
802 \
803 develop(bool, CheckZapUnusedHeapArea, false, \
804 "Check zapping of unused heap space") \
805 \
806 develop(bool, ZapFillerObjects, trueInDebug, \
807 "Zap filler objects with 0xDEAFBABE") \
808 \
809 develop(bool, PrintVMMessages, true, \
810 "Print vm messages on console") \
811 \
812 product(bool, PrintGCApplicationConcurrentTime, false, \
813 "Print the time the application has been running") \
814 \
815 product(bool, PrintGCApplicationStoppedTime, false, \
816 "Print the time the application has been stopped") \
817 \
818 notproduct(uintx, ErrorHandlerTest, 0, \
819 "If > 0, provokes an error after VM initialization; the value" \
820 "determines which error to provoke. See test_error_handler()" \
821 "in debug.cpp.") \
822 \
823 develop(bool, Verbose, false, \
824 "Prints additional debugging information from other modes") \
825 \
826 develop(bool, PrintMiscellaneous, false, \
827 "Prints uncategorized debugging information (requires +Verbose)") \
828 \
829 develop(bool, WizardMode, false, \
830 "Prints much more debugging information") \
831 \
832 product(bool, ShowMessageBoxOnError, false, \
833 "Keep process alive on VM fatal error") \
834 \
835 product(bool, CreateMinidumpOnCrash, false, \
836 "Create minidump on VM fatal error") \
837 \
838 product_pd(bool, UseOSErrorReporting, \
839 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
840 \
841 product(bool, SuppressFatalErrorMessage, false, \
842 "Do NO Fatal Error report [Avoid deadlock]") \
843 \
844 product(ccstrlist, OnError, "", \
845 "Run user-defined commands on fatal error; see VMError.cpp " \
846 "for examples") \
847 \
848 product(ccstrlist, OnOutOfMemoryError, "", \
849 "Run user-defined commands on first java.lang.OutOfMemoryError") \
850 \
851 manageable(bool, HeapDumpBeforeFullGC, false, \
852 "Dump heap to file before any major stop-world GC") \
853 \
854 manageable(bool, HeapDumpAfterFullGC, false, \
855 "Dump heap to file after any major stop-world GC") \
856 \
857 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
858 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
859 \
860 manageable(ccstr, HeapDumpPath, NULL, \
861 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \
862 "directory) of the dump file (defaults to java_pid<pid>.hprof" \
863 "in the working directory)") \
864 \
865 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
866 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
867 "when the heap usage is larger than this") \
868 \
869 develop(uintx, HeapDumpSegmentSize, 1*G, \
870 "Approximate segment size when generating a segmented heap dump") \
871 \
872 develop(bool, BreakAtWarning, false, \
873 "Execute breakpoint upon encountering VM warning") \
874 \
875 product_pd(bool, UseVectoredExceptions, \
876 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \
877 \
878 develop(bool, TraceVMOperation, false, \
879 "Trace vm operations") \
880 \
881 develop(bool, UseFakeTimers, false, \
882 "Tells whether the VM should use system time or a fake timer") \
883 \
884 diagnostic(bool, LogCompilation, false, \
885 "Log compilation activity in detail to hotspot.log or LogFile") \
886 \
887 product(bool, PrintCompilation, false, \
888 "Print compilations") \
889 \
890 diagnostic(bool, TraceNMethodInstalls, false, \
891 "Trace nmethod intallation") \
892 \
893 diagnostic(intx, ScavengeRootsInCode, 2, \
894 "0: do not allow scavengable oops in the code cache; " \
895 "1: allow scavenging from the code cache; " \
896 "2: emit as many constants as the compiler can see") \
897 \
898 diagnostic(bool, TraceOSRBreakpoint, false, \
899 "Trace OSR Breakpoint ") \
900 \
901 diagnostic(bool, TraceCompileTriggered, false, \
902 "Trace compile triggered") \
903 \
904 diagnostic(bool, TraceTriggers, false, \
905 "Trace triggers") \
906 \
907 product(bool, AlwaysRestoreFPU, false, \
908 "Restore the FPU control word after every JNI call (expensive)") \
909 \
910 diagnostic(bool, PrintCompilation2, false, \
911 "Print additional statistics per compilation") \
912 \
913 diagnostic(bool, PrintAdapterHandlers, false, \
914 "Print code generated for i2c/c2i adapters") \
915 \
916 develop(bool, VerifyAdapterSharing, false, \
917 "Verify that the code for shared adapters is the equivalent") \
918 \
919 diagnostic(bool, PrintAssembly, false, \
920 "Print assembly code (using external disassembler.so)") \
921 \
922 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
923 "Options string passed to disassembler.so") \
924 \
925 diagnostic(bool, PrintNMethods, false, \
926 "Print assembly code for nmethods when generated") \
927 \
928 diagnostic(bool, PrintNativeNMethods, false, \
929 "Print assembly code for native nmethods when generated") \
930 \
931 develop(bool, PrintDebugInfo, false, \
932 "Print debug information for all nmethods when generated") \
933 \
934 develop(bool, PrintRelocations, false, \
935 "Print relocation information for all nmethods when generated") \
936 \
937 develop(bool, PrintDependencies, false, \
938 "Print dependency information for all nmethods when generated") \
939 \
940 develop(bool, PrintExceptionHandlers, false, \
941 "Print exception handler tables for all nmethods when generated") \
942 \
943 develop(bool, InterceptOSException, false, \
944 "Starts debugger when an implicit OS (e.g., NULL) " \
945 "exception happens") \
946 \
947 notproduct(bool, PrintCodeCache, false, \
948 "Print the compiled_code cache when exiting") \
949 \
950 develop(bool, PrintCodeCache2, false, \
951 "Print detailed info on the compiled_code cache when exiting") \
952 \
953 diagnostic(bool, PrintStubCode, false, \
954 "Print generated stub code") \
955 \
956 product(bool, StackTraceInThrowable, true, \
957 "Collect backtrace in throwable when exception happens") \
958 \
959 product(bool, OmitStackTraceInFastThrow, true, \
960 "Omit backtraces for some 'hot' exceptions in optimized code") \
961 \
962 product(bool, ProfilerPrintByteCodeStatistics, false, \
963 "Prints byte code statictics when dumping profiler output") \
964 \
965 product(bool, ProfilerRecordPC, false, \
966 "Collects tick for each 16 byte interval of compiled code") \
967 \
968 product(bool, ProfileVM, false, \
969 "Profiles ticks that fall within VM (either in the VM Thread " \
970 "or VM code called through stubs)") \
971 \
972 product(bool, ProfileIntervals, false, \
973 "Prints profiles for each interval (see ProfileIntervalsTicks)") \
974 \
975 notproduct(bool, ProfilerCheckIntervals, false, \
976 "Collect and print info on spacing of profiler ticks") \
977 \
978 develop(bool, PrintJVMWarnings, false, \
979 "Prints warnings for unimplemented JVM functions") \
980 \
981 product(bool, PrintWarnings, true, \
982 "Prints JVM warnings to output stream") \
983 \
984 notproduct(uintx, WarnOnStalledSpinLock, 0, \
985 "Prints warnings for stalled SpinLocks") \
986 \
987 develop(bool, InitializeJavaLangSystem, true, \
988 "Initialize java.lang.System - turn off for individual " \
989 "method debugging") \
990 \
991 develop(bool, InitializeJavaLangString, true, \
992 "Initialize java.lang.String - turn off for individual " \
993 "method debugging") \
994 \
995 develop(bool, InitializeJavaLangExceptionsErrors, true, \
996 "Initialize various error and exception classes - turn off for " \
997 "individual method debugging") \
998 \
999 product(bool, RegisterFinalizersAtInit, true, \
1000 "Register finalizable objects at end of Object.<init> or " \
1001 "after allocation") \
1002 \
1003 develop(bool, RegisterReferences, true, \
1004 "Tells whether the VM should register soft/weak/final/phantom " \
1005 "references") \
1006 \
1007 develop(bool, IgnoreRewrites, false, \
1008 "Supress rewrites of bytecodes in the oopmap generator. " \
1009 "This is unsafe!") \
1010 \
1011 develop(bool, PrintCodeCacheExtension, false, \
1012 "Print extension of code cache") \
1013 \
1014 develop(bool, UsePrivilegedStack, true, \
1015 "Enable the security JVM functions") \
1016 \
1017 develop(bool, IEEEPrecision, true, \
1018 "Enables IEEE precision (for INTEL only)") \
1019 \
1020 develop(bool, ProtectionDomainVerification, true, \
1021 "Verifies protection domain before resolution in system " \
1022 "dictionary") \
1023 \
1024 product(bool, ClassUnloading, true, \
1025 "Do unloading of classes") \
1026 \
1027 diagnostic(bool, LinkWellKnownClasses, false, \
1028 "Resolve a well known class as soon as its name is seen") \
1029 \
1030 develop(bool, DisableStartThread, false, \
1031 "Disable starting of additional Java threads " \
1032 "(for debugging only)") \
1033 \
1034 develop(bool, MemProfiling, false, \
1035 "Write memory usage profiling to log file") \
1036 \
1037 notproduct(bool, PrintSystemDictionaryAtExit, false, \
1038 "Prints the system dictionary at exit") \
1039 \
1040 diagnostic(bool, UnsyncloadClass, false, \
1041 "Unstable: VM calls loadClass unsynchronized. Custom " \
1042 "class loader must call VM synchronized for findClass " \
1043 "and defineClass.") \
1044 \
1045 product(bool, AlwaysLockClassLoader, false, \
1046 "Require the VM to acquire the class loader lock before calling " \
1047 "loadClass() even for class loaders registering " \
1048 "as parallel capable") \
1049 \
1050 product(bool, AllowParallelDefineClass, false, \
1051 "Allow parallel defineClass requests for class loaders " \
1052 "registering as parallel capable") \
1053 \
1054 product(bool, MustCallLoadClassInternal, false, \
1055 "Call loadClassInternal() rather than loadClass()") \
1056 \
1057 product_pd(bool, DontYieldALot, \
1058 "Throw away obvious excess yield calls (for SOLARIS only)") \
1059 \
1060 product_pd(bool, ConvertSleepToYield, \
1061 "Converts sleep(0) to thread yield " \
1062 "(may be off for SOLARIS to improve GUI)") \
1063 \
1064 product(bool, ConvertYieldToSleep, false, \
1065 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\
1066 "behavior (SOLARIS only)") \
1067 \
1068 product(bool, UseBoundThreads, true, \
1069 "Bind user level threads to kernel threads (for SOLARIS only)") \
1070 \
1071 develop(bool, UseDetachedThreads, true, \
1072 "Use detached threads that are recycled upon termination " \
1073 "(for SOLARIS only)") \
1074 \
1075 product(bool, UseLWPSynchronization, true, \
1076 "Use LWP-based instead of libthread-based synchronization " \
1077 "(SPARC only)") \
1078 \
1079 product(ccstr, SyncKnobs, NULL, \
1080 "(Unstable) Various monitor synchronization tunables") \
1081 \
1082 product(intx, EmitSync, 0, \
1083 "(Unsafe,Unstable) " \
1084 " Controls emission of inline sync fast-path code") \
1085 \
1086 product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \
1087 \
1088 product(intx, MonitorBound, 0, "Bound Monitor population") \
1089 \
1090 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
1091 \
1092 product(intx, Atomics, 0, \
1093 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \
1094 \
1095 product(intx, FenceInstruction, 0, \
1096 "(Unsafe,Unstable) Experimental") \
1097 \
1098 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \
1099 \
1100 product(intx, SyncVerbose, 0, "(Unstable)" ) \
1101 \
1102 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \
1103 \
1104 product(intx, hashCode, 0, \
1105 "(Unstable) select hashCode generation algorithm" ) \
1106 \
1107 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
1108 "(Unstable, Linux-specific)" \
1109 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \
1110 \
1111 product(bool, FilterSpuriousWakeups, true, \
1112 "Prevent spurious or premature wakeups from object.wait " \
1113 "(Solaris only)") \
1114 \
1115 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \
1116 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \
1117 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \
1118 \
1119 develop(bool, UsePthreads, false, \
1120 "Use pthread-based instead of libthread-based synchronization " \
1121 "(SPARC only)") \
1122 \
1123 product(bool, AdjustConcurrency, false, \
1124 "call thr_setconcurrency at thread create time to avoid " \
1125 "LWP starvation on MP systems (For Solaris Only)") \
1126 \
1127 develop(bool, UpdateHotSpotCompilerFileOnError, true, \
1128 "Should the system attempt to update the compiler file when " \
1129 "an error occurs?") \
1130 \
1131 product(bool, ReduceSignalUsage, false, \
1132 "Reduce the use of OS signals in Java and/or the VM") \
1133 \
1134 notproduct(bool, ValidateMarkSweep, false, \
1135 "Do extra validation during MarkSweep collection") \
1136 \
1137 notproduct(bool, RecordMarkSweepCompaction, false, \
1138 "Enable GC-to-GC recording and querying of compaction during " \
1139 "MarkSweep") \
1140 \
1141 develop_pd(bool, ShareVtableStubs, \
1142 "Share vtable stubs (smaller code but worse branch prediction") \
1143 \
1144 develop(bool, LoadLineNumberTables, true, \
1145 "Tells whether the class file parser loads line number tables") \
1146 \
1147 develop(bool, LoadLocalVariableTables, true, \
1148 "Tells whether the class file parser loads local variable tables")\
1149 \
1150 develop(bool, LoadLocalVariableTypeTables, true, \
1151 "Tells whether the class file parser loads local variable type tables")\
1152 \
1153 product(bool, AllowUserSignalHandlers, false, \
1154 "Do not complain if the application installs signal handlers " \
1155 "(Solaris & Linux only)") \
1156 \
1157 product(bool, UseSignalChaining, true, \
1158 "Use signal-chaining to invoke signal handlers installed " \
1159 "by the application (Solaris & Linux only)") \
1160 \
1161 product(bool, UseAltSigs, false, \
1162 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
1163 "internal signals (Solaris only)") \
1164 \
1165 product(bool, UseSpinning, false, \
1166 "Use spinning in monitor inflation and before entry") \
1167 \
1168 product(bool, PreSpinYield, false, \
1169 "Yield before inner spinning loop") \
1170 \
1171 product(bool, PostSpinYield, true, \
1172 "Yield after inner spinning loop") \
1173 \
1174 product(bool, AllowJNIEnvProxy, false, \
1175 "Allow JNIEnv proxies for jdbx") \
1176 \
1177 product(bool, JNIDetachReleasesMonitors, true, \
1178 "JNI DetachCurrentThread releases monitors owned by thread") \
1179 \
1180 product(bool, RestoreMXCSROnJNICalls, false, \
1181 "Restore MXCSR when returning from JNI calls") \
1182 \
1183 product(bool, CheckJNICalls, false, \
1184 "Verify all arguments to JNI calls") \
1185 \
1186 product(bool, UseFastJNIAccessors, true, \
1187 "Use optimized versions of Get<Primitive>Field") \
1188 \
1189 product(bool, EagerXrunInit, false, \
1190 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1191 " but not all -Xrun libraries may support the state of the VM at this time") \
1192 \
1193 product(bool, PreserveAllAnnotations, false, \
1194 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \
1195 \
1196 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1197 "Number of OutOfMemoryErrors preallocated with backtrace") \
1198 \
1199 product(bool, LazyBootClassLoader, true, \
1200 "Enable/disable lazy opening of boot class path entries") \
1201 \
1202 diagnostic(bool, UseIncDec, true, \
1203 "Use INC, DEC instructions on x86") \
1204 \
1205 product(bool, UseNewLongLShift, false, \
1206 "Use optimized bitwise shift left") \
1207 \
1208 product(bool, UseStoreImmI16, true, \
1209 "Use store immediate 16-bits value instruction on x86") \
1210 \
1211 product(bool, UseAddressNop, false, \
1212 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \
1213 \
1214 product(bool, UseXmmLoadAndClearUpper, true, \
1215 "Load low part of XMM register and clear upper part") \
1216 \
1217 product(bool, UseXmmRegToRegMoveAll, false, \
1218 "Copy all XMM register bits when moving value between registers") \
1219 \
1220 product(bool, UseXmmI2D, false, \
1221 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \
1222 \
1223 product(bool, UseXmmI2F, false, \
1224 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \
1225 \
1226 product(bool, UseXMMForArrayCopy, false, \
1227 "Use SSE2 MOVQ instruction for Arraycopy") \
1228 \
1229 product(bool, UseUnalignedLoadStores, false, \
1230 "Use SSE2 MOVDQU instruction for Arraycopy") \
1231 \
1232 product(bool, UseCBCond, false, \
1233 "Use compare and branch instruction on SPARC") \
1234 \
1235 product(intx, FieldsAllocationStyle, 1, \
1236 "0 - type based with oops first, 1 - with oops last, " \
1237 "2 - oops in super and sub classes are together") \
1238 \
1239 product(bool, CompactFields, true, \
1240 "Allocate nonstatic fields in gaps between previous fields") \
1241 \
1242 notproduct(bool, PrintCompactFieldsSavings, false, \
1243 "Print how many words were saved with CompactFields") \
1244 \
1245 product(bool, UseBiasedLocking, true, \
1246 "Enable biased locking in JVM") \
1247 \
1248 product(intx, BiasedLockingStartupDelay, 4000, \
1249 "Number of milliseconds to wait before enabling biased locking") \
1250 \
1251 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1252 "Print statistics of biased locking in JVM") \
1253 \
1254 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1255 "Threshold of number of revocations per type to try to " \
1256 "rebias all objects in the heap of that type") \
1257 \
1258 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1259 "Threshold of number of revocations per type to permanently " \
1260 "revoke biases of all objects in the heap of that type") \
1261 \
1262 product(intx, BiasedLockingDecayTime, 25000, \
1263 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1264 "type after previous bulk rebias") \
1265 \
1266 develop(bool, JavaObjectsInPerm, false, \
1267 "controls whether Classes and interned Strings are allocated" \
1268 "in perm. This purely intended to allow debugging issues" \
1269 "in production.") \
1270 \
1271 /* tracing */ \
1272 \
1273 notproduct(bool, TraceRuntimeCalls, false, \
1274 "Trace run-time calls") \
1275 \
1276 develop(bool, TraceJNICalls, false, \
1277 "Trace JNI calls") \
1278 \
1279 notproduct(bool, TraceJVMCalls, false, \
1280 "Trace JVM calls") \
1281 \
1282 product(ccstr, TraceJVMTI, NULL, \
1283 "Trace flags for JVMTI functions and events") \
1284 \
1285 /* This option can change an EMCP method into an obsolete method. */ \
1286 /* This can affect tests that except specific methods to be EMCP. */ \
1287 /* This option should be used with caution. */ \
1288 product(bool, StressLdcRewrite, false, \
1289 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1290 \
1291 product(intx, TraceRedefineClasses, 0, \
1292 "Trace level for JVMTI RedefineClasses") \
1293 \
1294 develop(bool, StressMethodComparator, false, \
1295 "run the MethodComparator on all loaded methods") \
1296 \
1297 /* change to false by default sometime after Mustang */ \
1298 product(bool, VerifyMergedCPBytecodes, true, \
1299 "Verify bytecodes after RedefineClasses constant pool merging") \
1300 \
1301 develop(bool, TraceJNIHandleAllocation, false, \
1302 "Trace allocation/deallocation of JNI handle blocks") \
1303 \
1304 develop(bool, TraceThreadEvents, false, \
1305 "Trace all thread events") \
1306 \
1307 develop(bool, TraceBytecodes, false, \
1308 "Trace bytecode execution") \
1309 \
1310 develop(bool, TraceClassInitialization, false, \
1311 "Trace class initialization") \
1312 \
1313 develop(bool, TraceExceptions, false, \
1314 "Trace exceptions") \
1315 \
1316 develop(bool, TraceICs, false, \
1317 "Trace inline cache changes") \
1318 \
1319 notproduct(bool, TraceInvocationCounterOverflow, false, \
1320 "Trace method invocation counter overflow") \
1321 \
1322 develop(bool, TraceInlineCacheClearing, false, \
1323 "Trace clearing of inline caches in nmethods") \
1324 \
1325 develop(bool, TraceDependencies, false, \
1326 "Trace dependencies") \
1327 \
1328 develop(bool, VerifyDependencies, trueInDebug, \
1329 "Exercise and verify the compilation dependency mechanism") \
1330 \
1331 develop(bool, TraceNewOopMapGeneration, false, \
1332 "Trace OopMapGeneration") \
1333 \
1334 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1335 "Trace OopMapGeneration: print detailed cell states") \
1336 \
1337 develop(bool, TimeOopMap, false, \
1338 "Time calls to GenerateOopMap::compute_map() in sum") \
1339 \
1340 develop(bool, TimeOopMap2, false, \
1341 "Time calls to GenerateOopMap::compute_map() individually") \
1342 \
1343 develop(bool, TraceMonitorMismatch, false, \
1344 "Trace monitor matching failures during OopMapGeneration") \
1345 \
1346 develop(bool, TraceOopMapRewrites, false, \
1347 "Trace rewritting of method oops during oop map generation") \
1348 \
1349 develop(bool, TraceSafepoint, false, \
1350 "Trace safepoint operations") \
1351 \
1352 develop(bool, TraceICBuffer, false, \
1353 "Trace usage of IC buffer") \
1354 \
1355 develop(bool, TraceCompiledIC, false, \
1356 "Trace changes of compiled IC") \
1357 \
1358 notproduct(bool, TraceZapDeadLocals, false, \
1359 "Trace zapping dead locals") \
1360 \
1361 develop(bool, TraceStartupTime, false, \
1362 "Trace setup time") \
1363 \
1364 product(ccstr, HPILibPath, NULL, \
1365 "Specify alternate path to HPI library") \
1366 \
1367 develop(bool, TraceProtectionDomainVerification, false, \
1368 "Trace protection domain verifcation") \
1369 \
1370 develop(bool, TraceClearedExceptions, false, \
1371 "Prints when an exception is forcibly cleared") \
1372 \
1373 product(bool, TraceClassResolution, false, \
1374 "Trace all constant pool resolutions (for debugging)") \
1375 \
1376 product(bool, TraceBiasedLocking, false, \
1377 "Trace biased locking in JVM") \
1378 \
1379 product(bool, TraceMonitorInflation, false, \
1380 "Trace monitor inflation in JVM") \
1381 \
1382 /* assembler */ \
1383 product(bool, Use486InstrsOnly, false, \
1384 "Use 80486 Compliant instruction subset") \
1385 \
1386 /* gc */ \
1387 \
1388 product(bool, UseSerialGC, false, \
1389 "Use the serial garbage collector") \
1390 \
1391 product(bool, UseG1GC, false, \
1392 "Use the Garbage-First garbage collector") \
1393 \
1394 product(bool, UseParallelGC, false, \
1395 "Use the Parallel Scavenge garbage collector") \
1396 \
1397 product(bool, UseParallelOldGC, false, \
1398 "Use the Parallel Old garbage collector") \
1399 \
1400 product(uintx, HeapMaximumCompactionInterval, 20, \
1401 "How often should we maximally compact the heap (not allowing " \
1402 "any dead space)") \
1403 \
1404 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1405 "The collection count for the first maximum compaction") \
1406 \
1407 product(bool, UseMaximumCompactionOnSystemGC, true, \
1408 "In the Parallel Old garbage collector maximum compaction for " \
1409 "a system GC") \
1410 \
1411 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1412 "The mean used by the par compact dead wood" \
1413 "limiter (a number between 0-100).") \
1414 \
1415 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1416 "The standard deviation used by the par compact dead wood" \
1417 "limiter (a number between 0-100).") \
1418 \
1419 product(uintx, ParallelGCThreads, 0, \
1420 "Number of parallel threads parallel gc will use") \
1421 \
1422 product(bool, UseDynamicNumberOfGCThreads, false, \
1423 "Dynamically choose the number of parallel threads " \
1424 "parallel gc will use") \
1425 \
1426 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
1427 "Force dynamic selection of the number of" \
1428 "parallel threads parallel gc will use to aid debugging") \
1429 \
1430 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \
1431 "Size of heap (bytes) per GC thread used in calculating the " \
1432 "number of GC threads") \
1433 \
1434 product(bool, TraceDynamicGCThreads, false, \
1435 "Trace the dynamic GC thread usage") \
1436 \
1437 develop(bool, ParallelOldGCSplitALot, false, \
1438 "Provoke splitting (copying data from a young gen space to" \
1439 "multiple destination spaces)") \
1440 \
1441 develop(uintx, ParallelOldGCSplitInterval, 3, \
1442 "How often to provoke splitting a young gen space") \
1443 \
1444 develop(bool, TraceRegionTasksQueuing, false, \
1445 "Trace the queuing of the region tasks") \
1446 \
1447 product(uintx, ConcGCThreads, 0, \
1448 "Number of threads concurrent gc will use") \
1449 \
1450 product(uintx, YoungPLABSize, 4096, \
1451 "Size of young gen promotion labs (in HeapWords)") \
1452 \
1453 product(uintx, OldPLABSize, 1024, \
1454 "Size of old gen promotion labs (in HeapWords)") \
1455 \
1456 product(uintx, GCTaskTimeStampEntries, 200, \
1457 "Number of time stamp entries per gc worker thread") \
1458 \
1459 product(bool, AlwaysTenure, false, \
1460 "Always tenure objects in eden. (ParallelGC only)") \
1461 \
1462 product(bool, NeverTenure, false, \
1463 "Never tenure objects in eden, May tenure on overflow " \
1464 "(ParallelGC only)") \
1465 \
1466 product(bool, ScavengeBeforeFullGC, true, \
1467 "Scavenge youngest generation before each full GC, " \
1468 "used with UseParallelGC") \
1469 \
1470 develop(bool, ScavengeWithObjectsInToSpace, false, \
1471 "Allow scavenges to occur when to_space contains objects.") \
1472 \
1473 product(bool, UseConcMarkSweepGC, false, \
1474 "Use Concurrent Mark-Sweep GC in the old generation") \
1475 \
1476 product(bool, ExplicitGCInvokesConcurrent, false, \
1477 "A System.gc() request invokes a concurrent collection;" \
1478 " (effective only when UseConcMarkSweepGC)") \
1479 \
1480 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1481 "A System.gc() request invokes a concurrent collection and " \
1482 "also unloads classes during such a concurrent gc cycle " \
1483 "(effective only when UseConcMarkSweepGC)") \
1484 \
1485 product(bool, GCLockerInvokesConcurrent, false, \
1486 "The exit of a JNI CS necessitating a scavenge also" \
1487 " kicks off a bkgrd concurrent collection") \
1488 \
1489 product(uintx, GCLockerEdenExpansionPercent, 5, \
1490 "How much the GC can expand the eden by while the GC locker " \
1491 "is active (as a percentage)") \
1492 \
1493 develop(bool, UseCMSAdaptiveFreeLists, true, \
1494 "Use Adaptive Free Lists in the CMS generation") \
1495 \
1496 develop(bool, UseAsyncConcMarkSweepGC, true, \
1497 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1498 \
1499 develop(bool, RotateCMSCollectionTypes, false, \
1500 "Rotate the CMS collections among concurrent and STW") \
1501 \
1502 product(bool, UseCMSBestFit, true, \
1503 "Use CMS best fit allocation strategy") \
1504 \
1505 product(bool, UseCMSCollectionPassing, true, \
1506 "Use passing of collection from background to foreground") \
1507 \
1508 product(bool, UseParNewGC, false, \
1509 "Use parallel threads in the new generation.") \
1510 \
1511 product(bool, ParallelGCVerbose, false, \
1512 "Verbose output for parallel GC.") \
1513 \
1514 product(intx, ParallelGCBufferWastePct, 10, \
1515 "wasted fraction of parallel allocation buffer.") \
1516 \
1517 diagnostic(bool, ParallelGCRetainPLAB, false, \
1518 "Retain parallel allocation buffers across scavenges; " \
1519 " -- disabled because this currently conflicts with " \
1520 " parallel card scanning under certain conditions ") \
1521 \
1522 product(intx, TargetPLABWastePct, 10, \
1523 "target wasted space in last buffer as pct of overall allocation")\
1524 \
1525 product(uintx, PLABWeight, 75, \
1526 "Percentage (0-100) used to weight the current sample when" \
1527 "computing exponentially decaying average for ResizePLAB.") \
1528 \
1529 product(bool, ResizePLAB, true, \
1530 "Dynamically resize (survivor space) promotion labs") \
1531 \
1532 product(bool, PrintPLAB, false, \
1533 "Print (survivor space) promotion labs sizing decisions") \
1534 \
1535 product(intx, ParGCArrayScanChunk, 50, \
1536 "Scan a subset and push remainder, if array is bigger than this") \
1537 \
1538 product(bool, ParGCUseLocalOverflow, false, \
1539 "Instead of a global overflow list, use local overflow stacks") \
1540 \
1541 product(bool, ParGCTrimOverflow, true, \
1542 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \
1543 \
1544 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1545 "Whether we should simulate work queue overflow in ParNew") \
1546 \
1547 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1548 "An `interval' counter that determines how frequently " \
1549 "we simulate overflow; a smaller number increases frequency") \
1550 \
1551 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1552 "The desired number of objects to claim from the overflow list") \
1553 \
1554 diagnostic(intx, ParGCStridesPerThread, 2, \
1555 "The number of strides per worker thread that we divide up the " \
1556 "card table scanning work into") \
1557 \
1558 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
1559 "The number of cards in each chunk of the parallel chunks used " \
1560 "during card table scanning") \
1561 \
1562 product(uintx, CMSParPromoteBlocksToClaim, 16, \
1563 "Number of blocks to attempt to claim when refilling CMS LAB for "\
1564 "parallel GC.") \
1565 \
1566 product(uintx, OldPLABWeight, 50, \
1567 "Percentage (0-100) used to weight the current sample when" \
1568 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \
1569 \
1570 product(bool, ResizeOldPLAB, true, \
1571 "Dynamically resize (old gen) promotion labs") \
1572 \
1573 product(bool, PrintOldPLAB, false, \
1574 "Print (old gen) promotion labs sizing decisions") \
1575 \
1576 product(uintx, CMSOldPLABMin, 16, \
1577 "Min size of CMS gen promotion lab caches per worker per blksize")\
1578 \
1579 product(uintx, CMSOldPLABMax, 1024, \
1580 "Max size of CMS gen promotion lab caches per worker per blksize")\
1581 \
1582 product(uintx, CMSOldPLABNumRefills, 4, \
1583 "Nominal number of refills of CMS gen promotion lab cache" \
1584 " per worker per block size") \
1585 \
1586 product(bool, CMSOldPLABResizeQuicker, false, \
1587 "Whether to react on-the-fly during a scavenge to a sudden" \
1588 " change in block demand rate") \
1589 \
1590 product(uintx, CMSOldPLABToleranceFactor, 4, \
1591 "The tolerance of the phase-change detector for on-the-fly" \
1592 " PLAB resizing during a scavenge") \
1593 \
1594 product(uintx, CMSOldPLABReactivityFactor, 2, \
1595 "The gain in the feedback loop for on-the-fly PLAB resizing" \
1596 " during a scavenge") \
1597 \
1598 product(uintx, CMSOldPLABReactivityCeiling, 10, \
1599 "The clamping of the gain in the feedback loop for on-the-fly" \
1600 " PLAB resizing during a scavenge") \
1601 \
1602 product(bool, AlwaysPreTouch, false, \
1603 "It forces all freshly committed pages to be pre-touched.") \
1604 \
1605 product_pd(intx, CMSYoungGenPerWorker, \
1606 "The maximum size of young gen chosen by default per GC worker " \
1607 "thread available") \
1608 \
1609 product(bool, GCOverheadReporting, false, \
1610 "Enables the GC overhead reporting facility") \
1611 \
1612 product(intx, GCOverheadReportingPeriodMS, 100, \
1613 "Reporting period for conc GC overhead reporting, in ms ") \
1614 \
1615 product(bool, CMSIncrementalMode, false, \
1616 "Whether CMS GC should operate in \"incremental\" mode") \
1617 \
1618 product(uintx, CMSIncrementalDutyCycle, 10, \
1619 "CMS incremental mode duty cycle (a percentage, 0-100). If" \
1620 "CMSIncrementalPacing is enabled, then this is just the initial" \
1621 "value") \
1622 \
1623 product(bool, CMSIncrementalPacing, true, \
1624 "Whether the CMS incremental mode duty cycle should be " \
1625 "automatically adjusted") \
1626 \
1627 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1628 "Lower bound on the duty cycle when CMSIncrementalPacing is " \
1629 "enabled (a percentage, 0-100)") \
1630 \
1631 product(uintx, CMSIncrementalSafetyFactor, 10, \
1632 "Percentage (0-100) used to add conservatism when computing the " \
1633 "duty cycle") \
1634 \
1635 product(uintx, CMSIncrementalOffset, 0, \
1636 "Percentage (0-100) by which the CMS incremental mode duty cycle" \
1637 " is shifted to the right within the period between young GCs") \
1638 \
1639 product(uintx, CMSExpAvgFactor, 50, \
1640 "Percentage (0-100) used to weight the current sample when" \
1641 "computing exponential averages for CMS statistics.") \
1642 \
1643 product(uintx, CMS_FLSWeight, 75, \
1644 "Percentage (0-100) used to weight the current sample when" \
1645 "computing exponentially decating averages for CMS FLS statistics.") \
1646 \
1647 product(uintx, CMS_FLSPadding, 1, \
1648 "The multiple of deviation from mean to use for buffering" \
1649 "against volatility in free list demand.") \
1650 \
1651 product(uintx, FLSCoalescePolicy, 2, \
1652 "CMS: Aggression level for coalescing, increasing from 0 to 4") \
1653 \
1654 product(bool, FLSAlwaysCoalesceLarge, false, \
1655 "CMS: Larger free blocks are always available for coalescing") \
1656 \
1657 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1658 "CMS: the smaller the percentage the greater the coalition force")\
1659 \
1660 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1661 "CMS: the factor by which to inflate estimated demand of small" \
1662 " block sizes to prevent coalescing with an adjoining block") \
1663 \
1664 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1665 "CMS: the factor by which to inflate estimated demand of large" \
1666 " block sizes to prevent coalescing with an adjoining block") \
1667 \
1668 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1669 "CMS: the factor by which to inflate estimated demand of small" \
1670 " block sizes to prevent splitting to supply demand for smaller" \
1671 " blocks") \
1672 \
1673 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1674 "CMS: the factor by which to inflate estimated demand of large" \
1675 " block sizes to prevent splitting to supply demand for smaller" \
1676 " blocks") \
1677 \
1678 product(bool, CMSExtrapolateSweep, false, \
1679 "CMS: cushion for block demand during sweep") \
1680 \
1681 product(uintx, CMS_SweepWeight, 75, \
1682 "Percentage (0-100) used to weight the current sample when " \
1683 "computing exponentially decaying average for inter-sweep " \
1684 "duration") \
1685 \
1686 product(uintx, CMS_SweepPadding, 1, \
1687 "The multiple of deviation from mean to use for buffering " \
1688 "against volatility in inter-sweep duration.") \
1689 \
1690 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1691 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1692 "duration exceeds this threhold in milliseconds") \
1693 \
1694 develop(bool, CMSTraceIncrementalMode, false, \
1695 "Trace CMS incremental mode") \
1696 \
1697 develop(bool, CMSTraceIncrementalPacing, false, \
1698 "Trace CMS incremental mode pacing computation") \
1699 \
1700 develop(bool, CMSTraceThreadState, false, \
1701 "Trace the CMS thread state (enable the trace_state() method)") \
1702 \
1703 product(bool, CMSClassUnloadingEnabled, false, \
1704 "Whether class unloading enabled when using CMS GC") \
1705 \
1706 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1707 "When CMS class unloading is enabled, the maximum CMS cycle count"\
1708 " for which classes may not be unloaded") \
1709 \
1710 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1711 "Compact when asked to collect CMS gen with clear_all_soft_refs") \
1712 \
1713 product(bool, UseCMSCompactAtFullCollection, true, \
1714 "Use mark sweep compact at full collections") \
1715 \
1716 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1717 "Number of CMS full collection done before compaction if > 0") \
1718 \
1719 develop(intx, CMSDictionaryChoice, 0, \
1720 "Use BinaryTreeDictionary as default in the CMS generation") \
1721 \
1722 product(uintx, CMSIndexedFreeListReplenish, 4, \
1723 "Replenish an indexed free list with this number of chunks") \
1724 \
1725 product(bool, CMSReplenishIntermediate, true, \
1726 "Replenish all intermediate free-list caches") \
1727 \
1728 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1729 "When satisfying batched demand, split blocks from the " \
1730 "IndexedFreeList whose size is a multiple of requested size") \
1731 \
1732 product(bool, CMSLoopWarn, false, \
1733 "Warn in case of excessive CMS looping") \
1734 \
1735 develop(bool, CMSOverflowEarlyRestoration, false, \
1736 "Whether preserved marks should be restored early") \
1737 \
1738 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1739 "Size of marking stack") \
1740 \
1741 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1742 "Max size of marking stack") \
1743 \
1744 notproduct(bool, CMSMarkStackOverflowALot, false, \
1745 "Whether we should simulate frequent marking stack / work queue" \
1746 " overflow") \
1747 \
1748 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1749 "An `interval' counter that determines how frequently" \
1750 " we simulate overflow; a smaller number increases frequency") \
1751 \
1752 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1753 "(Temporary, subject to experimentation)" \
1754 "Maximum number of abortable preclean iterations, if > 0") \
1755 \
1756 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1757 "(Temporary, subject to experimentation)" \
1758 "Maximum time in abortable preclean in ms") \
1759 \
1760 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1761 "(Temporary, subject to experimentation)" \
1762 "Nominal minimum work per abortable preclean iteration") \
1763 \
1764 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
1765 "(Temporary, subject to experimentation)" \
1766 " Time that we sleep between iterations when not given" \
1767 " enough work per iteration") \
1768 \
1769 product(uintx, CMSRescanMultiple, 32, \
1770 "Size (in cards) of CMS parallel rescan task") \
1771 \
1772 product(uintx, CMSConcMarkMultiple, 32, \
1773 "Size (in cards) of CMS concurrent MT marking task") \
1774 \
1775 product(uintx, CMSRevisitStackSize, 1*M, \
1776 "Size of CMS KlassKlass revisit stack") \
1777 \
1778 product(bool, CMSAbortSemantics, false, \
1779 "Whether abort-on-overflow semantics is implemented") \
1780 \
1781 product(bool, CMSParallelRemarkEnabled, true, \
1782 "Whether parallel remark enabled (only if ParNewGC)") \
1783 \
1784 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1785 "Whether parallel remark of survivor space" \
1786 " enabled (effective only if CMSParallelRemarkEnabled)") \
1787 \
1788 product(bool, CMSPLABRecordAlways, true, \
1789 "Whether to always record survivor space PLAB bdries" \
1790 " (effective only if CMSParallelSurvivorRemarkEnabled)") \
1791 \
1792 product(bool, CMSConcurrentMTEnabled, true, \
1793 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \
1794 \
1795 product(bool, CMSPermGenPrecleaningEnabled, true, \
1796 "Whether concurrent precleaning enabled in perm gen" \
1797 " (effective only when CMSPrecleaningEnabled is true)") \
1798 \
1799 product(bool, CMSPrecleaningEnabled, true, \
1800 "Whether concurrent precleaning enabled") \
1801 \
1802 product(uintx, CMSPrecleanIter, 3, \
1803 "Maximum number of precleaning iteration passes") \
1804 \
1805 product(uintx, CMSPrecleanNumerator, 2, \
1806 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1807 " ratio") \
1808 \
1809 product(uintx, CMSPrecleanDenominator, 3, \
1810 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1811 " ratio") \
1812 \
1813 product(bool, CMSPrecleanRefLists1, true, \
1814 "Preclean ref lists during (initial) preclean phase") \
1815 \
1816 product(bool, CMSPrecleanRefLists2, false, \
1817 "Preclean ref lists during abortable preclean phase") \
1818 \
1819 product(bool, CMSPrecleanSurvivors1, false, \
1820 "Preclean survivors during (initial) preclean phase") \
1821 \
1822 product(bool, CMSPrecleanSurvivors2, true, \
1823 "Preclean survivors during abortable preclean phase") \
1824 \
1825 product(uintx, CMSPrecleanThreshold, 1000, \
1826 "Don't re-iterate if #dirty cards less than this") \
1827 \
1828 product(bool, CMSCleanOnEnter, true, \
1829 "Clean-on-enter optimization for reducing number of dirty cards") \
1830 \
1831 product(uintx, CMSRemarkVerifyVariant, 1, \
1832 "Choose variant (1,2) of verification following remark") \
1833 \
1834 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1835 "If Eden used is below this value, don't try to schedule remark") \
1836 \
1837 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1838 "The Eden occupancy % at which to try and schedule remark pause") \
1839 \
1840 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1841 "Start sampling Eden top at least before yg occupancy reaches" \
1842 " 1/<ratio> of the size at which we plan to schedule remark") \
1843 \
1844 product(uintx, CMSSamplingGrain, 16*K, \
1845 "The minimum distance between eden samples for CMS (see above)") \
1846 \
1847 product(bool, CMSScavengeBeforeRemark, false, \
1848 "Attempt scavenge before the CMS remark step") \
1849 \
1850 develop(bool, CMSTraceSweeper, false, \
1851 "Trace some actions of the CMS sweeper") \
1852 \
1853 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1854 "Don't drain below this size per parallel worker/thief") \
1855 \
1856 manageable(intx, CMSWaitDuration, 2000, \
1857 "Time in milliseconds that CMS thread waits for young GC") \
1858 \
1859 product(bool, CMSYield, true, \
1860 "Yield between steps of concurrent mark & sweep") \
1861 \
1862 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1863 "Bitmap operations should process at most this many bits" \
1864 "between yields") \
1865 \
1866 product(bool, CMSDumpAtPromotionFailure, false, \
1867 "Dump useful information about the state of the CMS old " \
1868 " generation upon a promotion failure.") \
1869 \
1870 product(bool, CMSPrintChunksInDump, false, \
1871 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1872 " more detailed information about the free chunks.") \
1873 \
1874 product(bool, CMSPrintObjectsInDump, false, \
1875 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1876 " more detailed information about the allocated objects.") \
1877 \
1878 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1879 "Verify that all refs across the FLS boundary " \
1880 " are to valid objects") \
1881 \
1882 diagnostic(bool, FLSVerifyLists, false, \
1883 "Do lots of (expensive) FreeListSpace verification") \
1884 \
1885 diagnostic(bool, FLSVerifyIndexTable, false, \
1886 "Do lots of (expensive) FLS index table verification") \
1887 \
1888 develop(bool, FLSVerifyDictionary, false, \
1889 "Do lots of (expensive) FLS dictionary verification") \
1890 \
1891 develop(bool, VerifyBlockOffsetArray, false, \
1892 "Do (expensive!) block offset array verification") \
1893 \
1894 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
1895 "Maintain _unallocated_block in BlockOffsetArray" \
1896 " (currently applicable only to CMS collector)") \
1897 \
1898 develop(bool, TraceCMSState, false, \
1899 "Trace the state of the CMS collection") \
1900 \
1901 product(intx, RefDiscoveryPolicy, 0, \
1902 "Whether reference-based(0) or referent-based(1)") \
1903 \
1904 product(bool, ParallelRefProcEnabled, false, \
1905 "Enable parallel reference processing whenever possible") \
1906 \
1907 product(bool, ParallelRefProcBalancingEnabled, true, \
1908 "Enable balancing of reference processing queues") \
1909 \
1910 product(intx, CMSTriggerRatio, 80, \
1911 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1912 "allocated before a CMS collection cycle commences") \
1913 \
1914 product(intx, CMSTriggerPermRatio, 80, \
1915 "Percentage of MinHeapFreeRatio in the CMS perm generation that " \
1916 "is allocated before a CMS collection cycle commences, that " \
1917 "also collects the perm generation") \
1918 \
1919 product(uintx, CMSBootstrapOccupancy, 50, \
1920 "Percentage CMS generation occupancy at which to " \
1921 "initiate CMS collection for bootstrapping collection stats") \
1922 \
1923 product(intx, CMSInitiatingOccupancyFraction, -1, \
1924 "Percentage CMS generation occupancy to start a CMS collection " \
1925 "cycle. A negative value means that CMSTriggerRatio is used") \
1926 \
1927 product(uintx, InitiatingHeapOccupancyPercent, 45, \
1928 "Percentage of the (entire) heap occupancy to start a " \
1929 "concurrent GC cycle. It us used by GCs that trigger a " \
1930 "concurrent GC cycle based on the occupancy of the entire heap, " \
1931 "not just one of the generations (e.g., G1). A value of 0 " \
1932 "denotes 'do constant GC cycles'.") \
1933 \
1934 product(intx, CMSInitiatingPermOccupancyFraction, -1, \
1935 "Percentage CMS perm generation occupancy to start a " \
1936 "CMScollection cycle. A negative value means that " \
1937 "CMSTriggerPermRatio is used") \
1938 \
1939 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1940 "Only use occupancy as a crierion for starting a CMS collection") \
1941 \
1942 product(intx, CMSIsTooFullPercentage, 98, \
1943 "An absolute ceiling above which CMS will always consider the " \
1944 "perm gen ripe for collection") \
1945 \
1946 develop(bool, CMSTestInFreeList, false, \
1947 "Check if the coalesced range is already in the " \
1948 "free lists as claimed") \
1949 \
1950 notproduct(bool, CMSVerifyReturnedBytes, false, \
1951 "Check that all the garbage collected was returned to the " \
1952 "free lists.") \
1953 \
1954 notproduct(bool, ScavengeALot, false, \
1955 "Force scavenge at every Nth exit from the runtime system " \
1956 "(N=ScavengeALotInterval)") \
1957 \
1958 develop(bool, FullGCALot, false, \
1959 "Force full gc at every Nth exit from the runtime system " \
1960 "(N=FullGCALotInterval)") \
1961 \
1962 notproduct(bool, GCALotAtAllSafepoints, false, \
1963 "Enforce ScavengeALot/GCALot at all potential safepoints") \
1964 \
1965 product(bool, PrintPromotionFailure, false, \
1966 "Print additional diagnostic information following " \
1967 " promotion failure") \
1968 \
1969 notproduct(bool, PromotionFailureALot, false, \
1970 "Use promotion failure handling on every youngest generation " \
1971 "collection") \
1972 \
1973 develop(uintx, PromotionFailureALotCount, 1000, \
1974 "Number of promotion failures occurring at ParGCAllocBuffer" \
1975 "refill attempts (ParNew) or promotion attempts " \
1976 "(other young collectors) ") \
1977 \
1978 develop(uintx, PromotionFailureALotInterval, 5, \
1979 "Total collections between promotion failures alot") \
1980 \
1981 experimental(intx, WorkStealingSleepMillis, 1, \
1982 "Sleep time when sleep is used for yields") \
1983 \
1984 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \
1985 "Number of yields before a sleep is done during workstealing") \
1986 \
1987 experimental(uintx, WorkStealingHardSpins, 4096, \
1988 "Number of iterations in a spin loop between checks on " \
1989 "time out of hard spin") \
1990 \
1991 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \
1992 "Ratio of hard spins to calls to yield") \
1993 \
1994 product(uintx, PreserveMarkStackSize, 1024, \
1995 "Size for stack used in promotion failure handling") \
1996 \
1997 develop(uintx, ObjArrayMarkingStride, 512, \
1998 "Number of ObjArray elements to push onto the marking stack" \
1999 "before pushing a continuation entry") \
2000 \
2001 notproduct(bool, ExecuteInternalVMTests, false, \
2002 "Enable execution of internal VM tests.") \
2003 \
2004 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
2005 \
2006 product_pd(bool, ResizeTLAB, \
2007 "Dynamically resize tlab size for threads") \
2008 \
2009 product(bool, ZeroTLAB, false, \
2010 "Zero out the newly created TLAB") \
2011 \
2012 product(bool, FastTLABRefill, true, \
2013 "Use fast TLAB refill code") \
2014 \
2015 product(bool, PrintTLAB, false, \
2016 "Print various TLAB related information") \
2017 \
2018 product(bool, TLABStats, true, \
2019 "Print various TLAB related information") \
2020 \
2021 product(bool, UseBlockZeroing, false, \
2022 "Use special cpu instructions for block zeroing") \
2023 \
2024 product(intx, BlockZeroingLowLimit, 2048, \
2025 "Minimum size in bytes when block zeroing will be used") \
2026 \
2027 product(bool, UseBlockCopy, false, \
2028 "Use special cpu instructions for block copy") \
2029 \
2030 product(intx, BlockCopyLowLimit, 2048, \
2031 "Minimum size in bytes when block copy will be used") \
2032 \
2033 product(bool, PrintRevisitStats, false, \
2034 "Print revisit (klass and MDO) stack related information") \
2035 \
2036 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \
2037 "Enable LowMemoryProtection")) \
2038 \
2039 product_pd(bool, NeverActAsServerClassMachine, \
2040 "Never act like a server-class machine") \
2041 \
2042 product(bool, AlwaysActAsServerClassMachine, false, \
2043 "Always act like a server-class machine") \
2044 \
2045 product_pd(uint64_t, MaxRAM, \
2046 "Real memory size (in bytes) used to set maximum heap size") \
2047 \
2048 product(uintx, ErgoHeapSizeLimit, 0, \
2049 "Maximum ergonomically set heap size (in bytes); zero means use " \
2050 "MaxRAM / MaxRAMFraction") \
2051 \
2052 product(uintx, MaxRAMFraction, 4, \
2053 "Maximum fraction (1/n) of real memory used for maximum heap " \
2054 "size") \
2055 \
2056 product(uintx, DefaultMaxRAMFraction, 4, \
2057 "Maximum fraction (1/n) of real memory used for maximum heap " \
2058 "size; deprecated: to be renamed to MaxRAMFraction") \
2059 \
2060 product(uintx, MinRAMFraction, 2, \
2061 "Minimum fraction (1/n) of real memory used for maxmimum heap " \
2062 "size on systems with small physical memory size") \
2063 \
2064 product(uintx, InitialRAMFraction, 64, \
2065 "Fraction (1/n) of real memory used for initial heap size") \
2066 \
2067 product(bool, UseAutoGCSelectPolicy, false, \
2068 "Use automatic collection selection policy") \
2069 \
2070 product(uintx, AutoGCSelectPauseMillis, 5000, \
2071 "Automatic GC selection pause threshhold in ms") \
2072 \
2073 product(bool, UseAdaptiveSizePolicy, true, \
2074 "Use adaptive generation sizing policies") \
2075 \
2076 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
2077 "Use adaptive survivor sizing policies") \
2078 \
2079 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
2080 "Use adaptive young-old sizing policies at minor collections") \
2081 \
2082 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
2083 "Use adaptive young-old sizing policies at major collections") \
2084 \
2085 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
2086 "Use statistics from System.GC for adaptive size policy") \
2087 \
2088 product(bool, UseAdaptiveGCBoundary, false, \
2089 "Allow young-old boundary to move") \
2090 \
2091 develop(bool, TraceAdaptiveGCBoundary, false, \
2092 "Trace young-old boundary moves") \
2093 \
2094 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
2095 "Resize the virtual spaces of the young or old generations") \
2096 \
2097 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
2098 "Policy for changeing generation size for throughput goals") \
2099 \
2100 product(uintx, AdaptiveSizePausePolicy, 0, \
2101 "Policy for changing generation size for pause goals") \
2102 \
2103 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
2104 "Adjust tenured generation to achive a minor pause goal") \
2105 \
2106 develop(bool, PSAdjustYoungGenForMajorPause, false, \
2107 "Adjust young generation to achive a major pause goal") \
2108 \
2109 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
2110 "Number of steps where heuristics is used before data is used") \
2111 \
2112 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
2113 "Number of collections before the adaptive sizing is started") \
2114 \
2115 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
2116 "Collecton interval for printing information; zero => never") \
2117 \
2118 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
2119 "Use adaptive minimum footprint as a goal") \
2120 \
2121 product(uintx, AdaptiveSizePolicyWeight, 10, \
2122 "Weight given to exponential resizing, between 0 and 100") \
2123 \
2124 product(uintx, AdaptiveTimeWeight, 25, \
2125 "Weight given to time in adaptive policy, between 0 and 100") \
2126 \
2127 product(uintx, PausePadding, 1, \
2128 "How much buffer to keep for pause time") \
2129 \
2130 product(uintx, PromotedPadding, 3, \
2131 "How much buffer to keep for promotion failure") \
2132 \
2133 product(uintx, SurvivorPadding, 3, \
2134 "How much buffer to keep for survivor overflow") \
2135 \
2136 product(uintx, AdaptivePermSizeWeight, 20, \
2137 "Weight for perm gen exponential resizing, between 0 and 100") \
2138 \
2139 product(uintx, PermGenPadding, 3, \
2140 "How much buffer to keep for perm gen sizing") \
2141 \
2142 product(uintx, ThresholdTolerance, 10, \
2143 "Allowed collection cost difference between generations") \
2144 \
2145 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
2146 "If collection costs are within margin, reduce both by full " \
2147 "delta") \
2148 \
2149 product(uintx, YoungGenerationSizeIncrement, 20, \
2150 "Adaptive size percentage change in young generation") \
2151 \
2152 product(uintx, YoungGenerationSizeSupplement, 80, \
2153 "Supplement to YoungedGenerationSizeIncrement used at startup") \
2154 \
2155 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
2156 "Decay factor to YoungedGenerationSizeSupplement") \
2157 \
2158 product(uintx, TenuredGenerationSizeIncrement, 20, \
2159 "Adaptive size percentage change in tenured generation") \
2160 \
2161 product(uintx, TenuredGenerationSizeSupplement, 80, \
2162 "Supplement to TenuredGenerationSizeIncrement used at startup") \
2163 \
2164 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
2165 "Decay factor to TenuredGenerationSizeIncrement") \
2166 \
2167 product(uintx, MaxGCPauseMillis, max_uintx, \
2168 "Adaptive size policy maximum GC pause time goal in msec, " \
2169 "or (G1 Only) the max. GC time per MMU time slice") \
2170 \
2171 product(uintx, GCPauseIntervalMillis, 0, \
2172 "Time slice for MMU specification") \
2173 \
2174 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
2175 "Adaptive size policy maximum GC minor pause time goal in msec") \
2176 \
2177 product(uintx, GCTimeRatio, 99, \
2178 "Adaptive size policy application time to GC time ratio") \
2179 \
2180 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
2181 "Adaptive size scale down factor for shrinking") \
2182 \
2183 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
2184 "Adaptive size decays the major cost for long major intervals") \
2185 \
2186 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
2187 "Time scale over which major costs decay") \
2188 \
2189 product(uintx, MinSurvivorRatio, 3, \
2190 "Minimum ratio of young generation/survivor space size") \
2191 \
2192 product(uintx, InitialSurvivorRatio, 8, \
2193 "Initial ratio of eden/survivor space size") \
2194 \
2195 product(uintx, BaseFootPrintEstimate, 256*M, \
2196 "Estimate of footprint other than Java Heap") \
2197 \
2198 product(bool, UseGCOverheadLimit, true, \
2199 "Use policy to limit of proportion of time spent in GC " \
2200 "before an OutOfMemory error is thrown") \
2201 \
2202 product(uintx, GCTimeLimit, 98, \
2203 "Limit of proportion of time spent in GC before an OutOfMemory" \
2204 "error is thrown (used with GCHeapFreeLimit)") \
2205 \
2206 product(uintx, GCHeapFreeLimit, 2, \
2207 "Minimum percentage of free space after a full GC before an " \
2208 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
2209 \
2210 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
2211 "Number of consecutive collections before gc time limit fires") \
2212 \
2213 product(bool, PrintAdaptiveSizePolicy, false, \
2214 "Print information about AdaptiveSizePolicy") \
2215 \
2216 product(intx, PrefetchCopyIntervalInBytes, -1, \
2217 "How far ahead to prefetch destination area (<= 0 means off)") \
2218 \
2219 product(intx, PrefetchScanIntervalInBytes, -1, \
2220 "How far ahead to prefetch scan area (<= 0 means off)") \
2221 \
2222 product(intx, PrefetchFieldsAhead, -1, \
2223 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2224 \
2225 develop(bool, UsePrefetchQueue, true, \
2226 "Use the prefetch queue during PS promotion") \
2227 \
2228 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2229 "Verify system before exiting") \
2230 \
2231 diagnostic(bool, VerifyBeforeGC, false, \
2232 "Verify memory system before GC") \
2233 \
2234 diagnostic(bool, VerifyAfterGC, false, \
2235 "Verify memory system after GC") \
2236 \
2237 diagnostic(bool, VerifyDuringGC, false, \
2238 "Verify memory system during GC (between phases)") \
2239 \
2240 diagnostic(bool, GCParallelVerificationEnabled, true, \
2241 "Enable parallel memory system verification") \
2242 \
2243 diagnostic(bool, DeferInitialCardMark, false, \
2244 "When +ReduceInitialCardMarks, explicitly defer any that " \
2245 "may arise from new_pre_store_barrier") \
2246 \
2247 diagnostic(bool, VerifyRememberedSets, false, \
2248 "Verify GC remembered sets") \
2249 \
2250 diagnostic(bool, VerifyObjectStartArray, true, \
2251 "Verify GC object start array if verify before/after") \
2252 \
2253 product(bool, DisableExplicitGC, false, \
2254 "Tells whether calling System.gc() does a full GC") \
2255 \
2256 notproduct(bool, CheckMemoryInitialization, false, \
2257 "Checks memory initialization") \
2258 \
2259 product(bool, CollectGen0First, false, \
2260 "Collect youngest generation before each full GC") \
2261 \
2262 diagnostic(bool, BindCMSThreadToCPU, false, \
2263 "Bind CMS Thread to CPU if possible") \
2264 \
2265 diagnostic(uintx, CPUForCMSThread, 0, \
2266 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2267 \
2268 product(bool, BindGCTaskThreadsToCPUs, false, \
2269 "Bind GCTaskThreads to CPUs if possible") \
2270 \
2271 product(bool, UseGCTaskAffinity, false, \
2272 "Use worker affinity when asking for GCTasks") \
2273 \
2274 product(uintx, ProcessDistributionStride, 4, \
2275 "Stride through processors when distributing processes") \
2276 \
2277 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2278 "number of times the coordinator GC thread will sleep while " \
2279 "yielding before giving up and resuming GC") \
2280 \
2281 product(uintx, CMSYieldSleepCount, 0, \
2282 "number of times a GC thread (minus the coordinator) " \
2283 "will sleep while yielding before giving up and resuming GC") \
2284 \
2285 /* gc tracing */ \
2286 manageable(bool, PrintGC, false, \
2287 "Print message at garbage collect") \
2288 \
2289 manageable(bool, PrintGCDetails, false, \
2290 "Print more details at garbage collect") \
2291 \
2292 manageable(bool, PrintGCDateStamps, false, \
2293 "Print date stamps at garbage collect") \
2294 \
2295 manageable(bool, PrintGCTimeStamps, false, \
2296 "Print timestamps at garbage collect") \
2297 \
2298 product(bool, PrintGCTaskTimeStamps, false, \
2299 "Print timestamps for individual gc worker thread tasks") \
2300 \
2301 develop(intx, ConcGCYieldTimeout, 0, \
2302 "If non-zero, assert that GC threads yield within this # of ms.") \
2303 \
2304 notproduct(bool, TraceMarkSweep, false, \
2305 "Trace mark sweep") \
2306 \
2307 product(bool, PrintReferenceGC, false, \
2308 "Print times spent handling reference objects during GC " \
2309 " (enabled only when PrintGCDetails)") \
2310 \
2311 develop(bool, TraceReferenceGC, false, \
2312 "Trace handling of soft/weak/final/phantom references") \
2313 \
2314 develop(bool, TraceFinalizerRegistration, false, \
2315 "Trace registration of final references") \
2316 \
2317 notproduct(bool, TraceScavenge, false, \
2318 "Trace scavenge") \
2319 \
2320 product_rw(bool, TraceClassLoading, false, \
2321 "Trace all classes loaded") \
2322 \
2323 product(bool, TraceClassLoadingPreorder, false, \
2324 "Trace all classes loaded in order referenced (not loaded)") \
2325 \
2326 product_rw(bool, TraceClassUnloading, false, \
2327 "Trace unloading of classes") \
2328 \
2329 product_rw(bool, TraceLoaderConstraints, false, \
2330 "Trace loader constraints") \
2331 \
2332 product(bool, TraceGen0Time, false, \
2333 "Trace accumulated time for Gen 0 collection") \
2334 \
2335 product(bool, TraceGen1Time, false, \
2336 "Trace accumulated time for Gen 1 collection") \
2337 \
2338 product(bool, PrintTenuringDistribution, false, \
2339 "Print tenuring age information") \
2340 \
2341 product_rw(bool, PrintHeapAtGC, false, \
2342 "Print heap layout before and after each GC") \
2343 \
2344 product_rw(bool, PrintHeapAtGCExtended, false, \
2345 "Prints extended information about the layout of the heap " \
2346 "when -XX:+PrintHeapAtGC is set") \
2347 \
2348 product(bool, PrintHeapAtSIGBREAK, true, \
2349 "Print heap layout in response to SIGBREAK") \
2350 \
2351 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
2352 "Print a class histogram before any major stop-world GC") \
2353 \
2354 manageable(bool, PrintClassHistogramAfterFullGC, false, \
2355 "Print a class histogram after any major stop-world GC") \
2356 \
2357 manageable(bool, PrintClassHistogram, false, \
2358 "Print a histogram of class instances") \
2359 \
2360 develop(bool, TraceWorkGang, false, \
2361 "Trace activities of work gangs") \
2362 \
2363 product(bool, TraceParallelOldGCTasks, false, \
2364 "Trace multithreaded GC activity") \
2365 \
2366 develop(bool, TraceBlockOffsetTable, false, \
2367 "Print BlockOffsetTable maps") \
2368 \
2369 develop(bool, TraceCardTableModRefBS, false, \
2370 "Print CardTableModRefBS maps") \
2371 \
2372 develop(bool, TraceGCTaskManager, false, \
2373 "Trace actions of the GC task manager") \
2374 \
2375 develop(bool, TraceGCTaskQueue, false, \
2376 "Trace actions of the GC task queues") \
2377 \
2378 diagnostic(bool, TraceGCTaskThread, false, \
2379 "Trace actions of the GC task threads") \
2380 \
2381 product(bool, PrintParallelOldGCPhaseTimes, false, \
2382 "Print the time taken by each parallel old gc phase." \
2383 "PrintGCDetails must also be enabled.") \
2384 \
2385 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2386 "Trace parallel old gc marking phase") \
2387 \
2388 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2389 "Trace parallel old gc summary phase") \
2390 \
2391 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2392 "Trace parallel old gc compaction phase") \
2393 \
2394 develop(bool, TraceParallelOldGCDensePrefix, false, \
2395 "Trace parallel old gc dense prefix computation") \
2396 \
2397 develop(bool, IgnoreLibthreadGPFault, false, \
2398 "Suppress workaround for libthread GP fault") \
2399 \
2400 product(bool, PrintJNIGCStalls, false, \
2401 "Print diagnostic message when GC is stalled" \
2402 "by JNI critical section") \
2403 \
2404 /* GC log rotation setting */ \
2405 \
2406 product(bool, UseGCLogFileRotation, false, \
2407 "Prevent large gclog file for long running app. " \
2408 "Requires -Xloggc:<filename>") \
2409 \
2410 product(uintx, NumberOfGCLogFiles, 0, \
2411 "Number of gclog files in rotation, " \
2412 "Default: 0, no rotation") \
2413 \
2414 product(uintx, GCLogFileSize, 0, \
2415 "GC log file size, Default: 0 bytes, no rotation " \
2416 "Only valid with UseGCLogFileRotation") \
2417 \
2418 /* JVMTI heap profiling */ \
2419 \
2420 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2421 "Trace JVMTI object tagging calls") \
2422 \
2423 diagnostic(bool, VerifyBeforeIteration, false, \
2424 "Verify memory system before JVMTI iteration") \
2425 \
2426 /* compiler interface */ \
2427 \
2428 develop(bool, CIPrintCompilerName, false, \
2429 "when CIPrint is active, print the name of the active compiler") \
2430 \
2431 develop(bool, CIPrintCompileQueue, false, \
2432 "display the contents of the compile queue whenever a " \
2433 "compilation is enqueued") \
2434 \
2435 develop(bool, CIPrintRequests, false, \
2436 "display every request for compilation") \
2437 \
2438 product(bool, CITime, false, \
2439 "collect timing information for compilation") \
2440 \
2441 develop(bool, CITimeEach, false, \
2442 "display timing information after each successful compilation") \
2443 \
2444 develop(bool, CICountOSR, true, \
2445 "use a separate counter when assigning ids to osr compilations") \
2446 \
2447 develop(bool, CICompileNatives, true, \
2448 "compile native methods if supported by the compiler") \
2449 \
2450 develop_pd(bool, CICompileOSR, \
2451 "compile on stack replacement methods if supported by the " \
2452 "compiler") \
2453 \
2454 develop(bool, CIPrintMethodCodes, false, \
2455 "print method bytecodes of the compiled code") \
2456 \
2457 develop(bool, CIPrintTypeFlow, false, \
2458 "print the results of ciTypeFlow analysis") \
2459 \
2460 develop(bool, CITraceTypeFlow, false, \
2461 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2462 \
2463 develop(intx, CICloneLoopTestLimit, 100, \
2464 "size limit for blocks heuristically cloned in ciTypeFlow") \
2465 \
2466 develop(intx, OSROnlyBCI, -1, \
2467 "OSR only at this bci. Negative values mean exclude that bci") \
2468 \
2469 /* temp diagnostics */ \
2470 \
2471 diagnostic(bool, TraceRedundantCompiles, false, \
2472 "Have compile broker print when a request already in the queue is"\
2473 " requested again") \
2474 \
2475 diagnostic(bool, InitialCompileFast, false, \
2476 "Initial compile at CompLevel_fast_compile") \
2477 \
2478 diagnostic(bool, InitialCompileReallyFast, false, \
2479 "Initial compile at CompLevel_really_fast_compile (no profile)") \
2480 \
2481 diagnostic(bool, FullProfileOnReInterpret, true, \
2482 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\
2483 \
2484 /* compiler */ \
2485 \
2486 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2487 "Number of compiler threads to run") \
2488 \
2489 product(intx, CompilationPolicyChoice, 0, \
2490 "which compilation policy (0/1)") \
2491 \
2492 develop(bool, UseStackBanging, true, \
2493 "use stack banging for stack overflow checks (required for " \
2494 "proper StackOverflow handling; disable only to measure cost " \
2495 "of stackbanging)") \
2496 \
2497 develop(bool, Use24BitFPMode, true, \
2498 "Set 24-bit FPU mode on a per-compile basis ") \
2499 \
2500 develop(bool, Use24BitFP, true, \
2501 "use FP instructions that produce 24-bit precise results") \
2502 \
2503 develop(bool, UseStrictFP, true, \
2504 "use strict fp if modifier strictfp is set") \
2505 \
2506 develop(bool, GenerateSynchronizationCode, true, \
2507 "generate locking/unlocking code for synchronized methods and " \
2508 "monitors") \
2509 \
2510 develop(bool, GenerateCompilerNullChecks, true, \
2511 "Generate explicit null checks for loads/stores/calls") \
2512 \
2513 develop(bool, GenerateRangeChecks, true, \
2514 "Generate range checks for array accesses") \
2515 \
2516 develop_pd(bool, ImplicitNullChecks, \
2517 "generate code for implicit null checks") \
2518 \
2519 product(bool, PrintSafepointStatistics, false, \
2520 "print statistics about safepoint synchronization") \
2521 \
2522 product(intx, PrintSafepointStatisticsCount, 300, \
2523 "total number of safepoint statistics collected " \
2524 "before printing them out") \
2525 \
2526 product(intx, PrintSafepointStatisticsTimeout, -1, \
2527 "print safepoint statistics only when safepoint takes" \
2528 " more than PrintSafepointSatisticsTimeout in millis") \
2529 \
2530 product(bool, TraceSafepointCleanupTime, false, \
2531 "print the break down of clean up tasks performed during" \
2532 " safepoint") \
2533 \
2534 develop(bool, InlineAccessors, true, \
2535 "inline accessor methods (get/set)") \
2536 \
2537 product(bool, Inline, true, \
2538 "enable inlining") \
2539 \
2540 product(bool, ClipInlining, true, \
2541 "clip inlining if aggregate method exceeds DesiredMethodLimit") \
2542 \
2543 develop(bool, UseCHA, true, \
2544 "enable CHA") \
2545 \
2546 product(bool, UseTypeProfile, true, \
2547 "Check interpreter profile for historically monomorphic calls") \
2548 \
2549 product(intx, TypeProfileMajorReceiverPercent, 90, \
2550 "% of major receiver type to all profiled receivers") \
2551 \
2552 notproduct(bool, TimeCompiler, false, \
2553 "time the compiler") \
2554 \
2555 notproduct(bool, TimeCompiler2, false, \
2556 "detailed time the compiler (requires +TimeCompiler)") \
2557 \
2558 diagnostic(bool, PrintInlining, false, \
2559 "prints inlining optimizations") \
2560 \
2561 diagnostic(bool, PrintIntrinsics, false, \
2562 "prints attempted and successful inlining of intrinsics") \
2563 \
2564 product(bool, UseCountLeadingZerosInstruction, false, \
2565 "Use count leading zeros instruction") \
2566 \
2567 product(bool, UsePopCountInstruction, false, \
2568 "Use population count instruction") \
2569 \
2570 diagnostic(ccstrlist, DisableIntrinsic, "", \
2571 "do not expand intrinsics whose (internal) names appear here") \
2572 \
2573 develop(bool, StressReflectiveCode, false, \
2574 "Use inexact types at allocations, etc., to test reflection") \
2575 \
2576 develop(bool, EagerInitialization, false, \
2577 "Eagerly initialize classes if possible") \
2578 \
2579 develop(bool, TraceMethodReplacement, false, \
2580 "Print when methods are replaced do to recompilation") \
2581 \
2582 develop(bool, PrintMethodFlushing, false, \
2583 "print the nmethods being flushed") \
2584 \
2585 notproduct(bool, LogMultipleMutexLocking, false, \
2586 "log locking and unlocking of mutexes (only if multiple locks " \
2587 "are held)") \
2588 \
2589 develop(bool, UseRelocIndex, false, \
2590 "use an index to speed random access to relocations") \
2591 \
2592 develop(bool, StressCodeBuffers, false, \
2593 "Exercise code buffer expansion and other rare state changes") \
2594 \
2595 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2596 "Generate extra debugging info for non-safepoints in nmethods") \
2597 \
2598 diagnostic(bool, DebugInlinedCalls, true, \
2599 "If false, restricts profiled locations to the root method only") \
2600 \
2601 product(bool, PrintVMOptions, false, \
2602 "Print flags that appeared on the command line") \
2603 \
2604 product(bool, IgnoreUnrecognizedVMOptions, false, \
2605 "Ignore unrecognized VM options") \
2606 \
2607 product(bool, PrintCommandLineFlags, false, \
2608 "Print flags specified on command line or set by ergonomics") \
2609 \
2610 product(bool, PrintFlagsInitial, false, \
2611 "Print all VM flags before argument processing and exit VM") \
2612 \
2613 product(bool, PrintFlagsFinal, false, \
2614 "Print all VM flags after argument and ergonomic processing") \
2615 \
2616 notproduct(bool, PrintFlagsWithComments, false, \
2617 "Print all VM flags with default values and descriptions and exit")\
2618 \
2619 diagnostic(bool, SerializeVMOutput, true, \
2620 "Use a mutex to serialize output to tty and hotspot.log") \
2621 \
2622 diagnostic(bool, DisplayVMOutput, true, \
2623 "Display all VM output on the tty, independently of LogVMOutput") \
2624 \
2625 diagnostic(bool, LogVMOutput, trueInDebug, \
2626 "Save VM output to hotspot.log, or to LogFile") \
2627 \
2628 diagnostic(ccstr, LogFile, NULL, \
2629 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \
2630 \
2631 product(ccstr, ErrorFile, NULL, \
2632 "If an error occurs, save the error data to this file " \
2633 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2634 \
2635 product(bool, DisplayVMOutputToStderr, false, \
2636 "If DisplayVMOutput is true, display all VM output to stderr") \
2637 \
2638 product(bool, DisplayVMOutputToStdout, false, \
2639 "If DisplayVMOutput is true, display all VM output to stdout") \
2640 \
2641 product(bool, UseHeavyMonitors, false, \
2642 "use heavyweight instead of lightweight Java monitors") \
2643 \
2644 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2645 "print histogram of the symbol table") \
2646 \
2647 notproduct(bool, ExitVMOnVerifyError, false, \
2648 "standard exit from VM if bytecode verify error " \
2649 "(only in debug mode)") \
2650 \
2651 notproduct(ccstr, AbortVMOnException, NULL, \
2652 "Call fatal if this exception is thrown. Example: " \
2653 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2654 \
2655 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \
2656 "Call fatal if the exception pointed by AbortVMOnException " \
2657 "has this message.") \
2658 \
2659 develop(bool, DebugVtables, false, \
2660 "add debugging code to vtable dispatch") \
2661 \
2662 develop(bool, PrintVtables, false, \
2663 "print vtables when printing klass") \
2664 \
2665 notproduct(bool, PrintVtableStats, false, \
2666 "print vtables stats at end of run") \
2667 \
2668 develop(bool, TraceCreateZombies, false, \
2669 "trace creation of zombie nmethods") \
2670 \
2671 notproduct(bool, IgnoreLockingAssertions, false, \
2672 "disable locking assertions (for speed)") \
2673 \
2674 notproduct(bool, VerifyLoopOptimizations, false, \
2675 "verify major loop optimizations") \
2676 \
2677 product(bool, RangeCheckElimination, true, \
2678 "Split loop iterations to eliminate range checks") \
2679 \
2680 develop_pd(bool, UncommonNullCast, \
2681 "track occurrences of null in casts; adjust compiler tactics") \
2682 \
2683 develop(bool, TypeProfileCasts, true, \
2684 "treat casts like calls for purposes of type profiling") \
2685 \
2686 develop(bool, MonomorphicArrayCheck, true, \
2687 "Uncommon-trap array store checks that require full type check") \
2688 \
2689 diagnostic(bool, ProfileDynamicTypes, true, \
2690 "do extra type profiling and use it more aggressively") \
2691 \
2692 develop(bool, DelayCompilationDuringStartup, true, \
2693 "Delay invoking the compiler until main application class is " \
2694 "loaded") \
2695 \
2696 develop(bool, CompileTheWorld, false, \
2697 "Compile all methods in all classes in bootstrap class path " \
2698 "(stress test)") \
2699 \
2700 develop(bool, CompileTheWorldPreloadClasses, true, \
2701 "Preload all classes used by a class before start loading") \
2702 \
2703 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2704 "Force a safepoint every n compiles so sweeper can keep up") \
2705 \
2706 develop(bool, TraceIterativeGVN, false, \
2707 "Print progress during Iterative Global Value Numbering") \
2708 \
2709 develop(bool, FillDelaySlots, true, \
2710 "Fill delay slots (on SPARC only)") \
2711 \
2712 develop(bool, VerifyIterativeGVN, false, \
2713 "Verify Def-Use modifications during sparse Iterative Global " \
2714 "Value Numbering") \
2715 \
2716 notproduct(bool, TracePhaseCCP, false, \
2717 "Print progress during Conditional Constant Propagation") \
2718 \
2719 develop(bool, TimeLivenessAnalysis, false, \
2720 "Time computation of bytecode liveness analysis") \
2721 \
2722 develop(bool, TraceLivenessGen, false, \
2723 "Trace the generation of liveness analysis information") \
2724 \
2725 notproduct(bool, TraceLivenessQuery, false, \
2726 "Trace queries of liveness analysis information") \
2727 \
2728 notproduct(bool, CollectIndexSetStatistics, false, \
2729 "Collect information about IndexSets") \
2730 \
2731 develop(bool, PrintDominators, false, \
2732 "Print out dominator trees for GVN") \
2733 \
2734 develop(bool, UseLoopSafepoints, true, \
2735 "Generate Safepoint nodes in every loop") \
2736 \
2737 notproduct(bool, TraceCISCSpill, false, \
2738 "Trace allocators use of cisc spillable instructions") \
2739 \
2740 notproduct(bool, TraceSpilling, false, \
2741 "Trace spilling") \
2742 \
2743 product(bool, SplitIfBlocks, true, \
2744 "Clone compares and control flow through merge points to fold " \
2745 "some branches") \
2746 \
2747 develop(intx, FastAllocateSizeLimit, 128*K, \
2748 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2749 "Inline allocations larger than this in doublewords must go slow")\
2750 \
2751 product(bool, AggressiveOpts, false, \
2752 "Enable aggressive optimizations - see arguments.cpp") \
2753 \
2754 product(bool, UseStringCache, false, \
2755 "Enable String cache capabilities on String.java") \
2756 \
2757 /* statistics */ \
2758 develop(bool, CountCompiledCalls, false, \
2759 "counts method invocations") \
2760 \
2761 notproduct(bool, CountRuntimeCalls, false, \
2762 "counts VM runtime calls") \
2763 \
2764 develop(bool, CountJNICalls, false, \
2765 "counts jni method invocations") \
2766 \
2767 notproduct(bool, CountJVMCalls, false, \
2768 "counts jvm method invocations") \
2769 \
2770 notproduct(bool, CountRemovableExceptions, false, \
2771 "count exceptions that could be replaced by branches due to " \
2772 "inlining") \
2773 \
2774 notproduct(bool, ICMissHistogram, false, \
2775 "produce histogram of IC misses") \
2776 \
2777 notproduct(bool, PrintClassStatistics, false, \
2778 "prints class statistics at end of run") \
2779 \
2780 notproduct(bool, PrintMethodStatistics, false, \
2781 "prints method statistics at end of run") \
2782 \
2783 /* interpreter */ \
2784 develop(bool, ClearInterpreterLocals, false, \
2785 "Always clear local variables of interpreter activations upon " \
2786 "entry") \
2787 \
2788 product_pd(bool, RewriteBytecodes, \
2789 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2790 \
2791 product_pd(bool, RewriteFrequentPairs, \
2792 "Rewrite frequently used bytecode pairs into a single bytecode") \
2793 \
2794 diagnostic(bool, PrintInterpreter, false, \
2795 "Prints the generated interpreter code") \
2796 \
2797 product(bool, UseInterpreter, true, \
2798 "Use interpreter for non-compiled methods") \
2799 \
2800 develop(bool, UseFastSignatureHandlers, true, \
2801 "Use fast signature handlers for native calls") \
2802 \
2803 develop(bool, UseV8InstrsOnly, false, \
2804 "Use SPARC-V8 Compliant instruction subset") \
2805 \
2806 product(bool, UseNiagaraInstrs, false, \
2807 "Use Niagara-efficient instruction subset") \
2808 \
2809 develop(bool, UseCASForSwap, false, \
2810 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\
2811 \
2812 product(bool, UseLoopCounter, true, \
2813 "Increment invocation counter on backward branch") \
2814 \
2815 product(bool, UseFastEmptyMethods, true, \
2816 "Use fast method entry code for empty methods") \
2817 \
2818 product(bool, UseFastAccessorMethods, true, \
2819 "Use fast method entry code for accessor methods") \
2820 \
2821 product_pd(bool, UseOnStackReplacement, \
2822 "Use on stack replacement, calls runtime if invoc. counter " \
2823 "overflows in loop") \
2824 \
2825 notproduct(bool, TraceOnStackReplacement, false, \
2826 "Trace on stack replacement") \
2827 \
2828 develop(bool, PoisonOSREntry, true, \
2829 "Detect abnormal calls to OSR code") \
2830 \
2831 product_pd(bool, PreferInterpreterNativeStubs, \
2832 "Use always interpreter stubs for native methods invoked via " \
2833 "interpreter") \
2834 \
2835 develop(bool, CountBytecodes, false, \
2836 "Count number of bytecodes executed") \
2837 \
2838 develop(bool, PrintBytecodeHistogram, false, \
2839 "Print histogram of the executed bytecodes") \
2840 \
2841 develop(bool, PrintBytecodePairHistogram, false, \
2842 "Print histogram of the executed bytecode pairs") \
2843 \
2844 diagnostic(bool, PrintSignatureHandlers, false, \
2845 "Print code generated for native method signature handlers") \
2846 \
2847 develop(bool, VerifyOops, false, \
2848 "Do plausibility checks for oops") \
2849 \
2850 develop(bool, CheckUnhandledOops, false, \
2851 "Check for unhandled oops in VM code") \
2852 \
2853 develop(bool, VerifyJNIFields, trueInDebug, \
2854 "Verify jfieldIDs for instance fields") \
2855 \
2856 notproduct(bool, VerifyJNIEnvThread, false, \
2857 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2858 "from JNI") \
2859 \
2860 develop(bool, VerifyFPU, false, \
2861 "Verify FPU state (check for NaN's, etc.)") \
2862 \
2863 develop(bool, VerifyThread, false, \
2864 "Watch the thread register for corruption (SPARC only)") \
2865 \
2866 develop(bool, VerifyActivationFrameSize, false, \
2867 "Verify that activation frame didn't become smaller than its " \
2868 "minimal size") \
2869 \
2870 develop(bool, TraceFrequencyInlining, false, \
2871 "Trace frequency based inlining") \
2872 \
2873 notproduct(bool, TraceTypeProfile, false, \
2874 "Trace type profile") \
2875 \
2876 develop_pd(bool, InlineIntrinsics, \
2877 "Inline intrinsics that can be statically resolved") \
2878 \
2879 product_pd(bool, ProfileInterpreter, \
2880 "Profile at the bytecode level during interpretation") \
2881 \
2882 develop_pd(bool, ProfileTraps, \
2883 "Profile deoptimization traps at the bytecode level") \
2884 \
2885 product(intx, ProfileMaturityPercentage, 20, \
2886 "number of method invocations/branches (expressed as % of " \
2887 "CompileThreshold) before using the method's profile") \
2888 \
2889 develop(bool, PrintMethodData, false, \
2890 "Print the results of +ProfileInterpreter at end of run") \
2891 \
2892 develop(bool, VerifyDataPointer, trueInDebug, \
2893 "Verify the method data pointer during interpreter profiling") \
2894 \
2895 develop(bool, VerifyCompiledCode, false, \
2896 "Include miscellaneous runtime verifications in nmethod code; " \
2897 "default off because it disturbs nmethod size heuristics") \
2898 \
2899 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2900 "Manually make GC thread crash then dump java stack trace; " \
2901 "Test only") \
2902 \
2903 /* compilation */ \
2904 product(bool, UseCompiler, true, \
2905 "use compilation") \
2906 \
2907 develop(bool, TraceCompilationPolicy, false, \
2908 "Trace compilation policy") \
2909 \
2910 develop(bool, TimeCompilationPolicy, false, \
2911 "Time the compilation policy") \
2912 \
2913 product(bool, UseCounterDecay, true, \
2914 "adjust recompilation counters") \
2915 \
2916 develop(intx, CounterHalfLifeTime, 30, \
2917 "half-life time of invocation counters (in secs)") \
2918 \
2919 develop(intx, CounterDecayMinIntervalLength, 500, \
2920 "Min. ms. between invocation of CounterDecay") \
2921 \
2922 product(bool, AlwaysCompileLoopMethods, false, \
2923 "when using recompilation, never interpret methods " \
2924 "containing loops") \
2925 \
2926 product(bool, DontCompileHugeMethods, true, \
2927 "don't compile methods > HugeMethodLimit") \
2928 \
2929 /* Bytecode escape analysis estimation. */ \
2930 product(bool, EstimateArgEscape, true, \
2931 "Analyze bytecodes to estimate escape state of arguments") \
2932 \
2933 product(intx, BCEATraceLevel, 0, \
2934 "How much tracing to do of bytecode escape analysis estimates") \
2935 \
2936 product(intx, MaxBCEAEstimateLevel, 5, \
2937 "Maximum number of nested calls that are analyzed by BC EA.") \
2938 \
2939 product(intx, MaxBCEAEstimateSize, 150, \
2940 "Maximum bytecode size of a method to be analyzed by BC EA.") \
2941 \
2942 product(intx, AllocatePrefetchStyle, 1, \
2943 "0 = no prefetch, " \
2944 "1 = prefetch instructions for each allocation, " \
2945 "2 = use TLAB watermark to gate allocation prefetch, " \
2946 "3 = use BIS instruction on Sparc for allocation prefetch") \
2947 \
2948 product(intx, AllocatePrefetchDistance, -1, \
2949 "Distance to prefetch ahead of allocation pointer") \
2950 \
2951 product(intx, AllocatePrefetchLines, 3, \
2952 "Number of lines to prefetch ahead of array allocation pointer") \
2953 \
2954 product(intx, AllocateInstancePrefetchLines, 1, \
2955 "Number of lines to prefetch ahead of instance allocation pointer") \
2956 \
2957 product(intx, AllocatePrefetchStepSize, 16, \
2958 "Step size in bytes of sequential prefetch instructions") \
2959 \
2960 product(intx, AllocatePrefetchInstr, 0, \
2961 "Prefetch instruction to prefetch ahead of allocation pointer") \
2962 \
2963 product(intx, ReadPrefetchInstr, 0, \
2964 "Prefetch instruction to prefetch ahead") \
2965 \
2966 product(uintx, ArraycopySrcPrefetchDistance, 0, \
2967 "Distance to prefetch source array in arracopy") \
2968 \
2969 product(uintx, ArraycopyDstPrefetchDistance, 0, \
2970 "Distance to prefetch destination array in arracopy") \
2971 \
2972 /* deoptimization */ \
2973 develop(bool, TraceDeoptimization, false, \
2974 "Trace deoptimization") \
2975 \
2976 develop(bool, DebugDeoptimization, false, \
2977 "Tracing various information while debugging deoptimization") \
2978 \
2979 product(intx, SelfDestructTimer, 0, \
2980 "Will cause VM to terminate after a given time (in minutes) " \
2981 "(0 means off)") \
2982 \
2983 product(intx, MaxJavaStackTraceDepth, 1024, \
2984 "Max. no. of lines in the stack trace for Java exceptions " \
2985 "(0 means all)") \
2986 \
2987 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
2988 "Guarantee a safepoint (at least) every so many milliseconds " \
2989 "(0 means none)")) \
2990 \
2991 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \
2992 "Guarantee a safepoint (at least) every so many milliseconds " \
2993 "(0 means none)")) \
2994 \
2995 product(intx, SafepointTimeoutDelay, 10000, \
2996 "Delay in milliseconds for option SafepointTimeout") \
2997 \
2998 product(intx, NmethodSweepFraction, 4, \
2999 "Number of invocations of sweeper to cover all nmethods") \
3000 \
3001 product(intx, NmethodSweepCheckInterval, 5, \
3002 "Compilers wake up every n seconds to possibly sweep nmethods") \
3003 \
3004 notproduct(bool, LogSweeper, false, \
3005 "Keep a ring buffer of sweeper activity") \
3006 \
3007 notproduct(intx, SweeperLogEntries, 1024, \
3008 "Number of records in the ring buffer of sweeper activity") \
3009 \
3010 notproduct(intx, MemProfilingInterval, 500, \
3011 "Time between each invocation of the MemProfiler") \
3012 \
3013 develop(intx, MallocCatchPtr, -1, \
3014 "Hit breakpoint when mallocing/freeing this pointer") \
3015 \
3016 notproduct(intx, AssertRepeat, 1, \
3017 "number of times to evaluate expression in assert " \
3018 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
3019 \
3020 notproduct(ccstrlist, SuppressErrorAt, "", \
3021 "List of assertions (file:line) to muzzle") \
3022 \
3023 notproduct(uintx, HandleAllocationLimit, 1024, \
3024 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
3025 "is used") \
3026 \
3027 develop(uintx, TotalHandleAllocationLimit, 1024, \
3028 "Threshold for total handle allocation when " \
3029 "+TraceHandleAllocation is used") \
3030 \
3031 develop(intx, StackPrintLimit, 100, \
3032 "number of stack frames to print in VM-level stack dump") \
3033 \
3034 notproduct(intx, MaxElementPrintSize, 256, \
3035 "maximum number of elements to print") \
3036 \
3037 notproduct(intx, MaxSubklassPrintSize, 4, \
3038 "maximum number of subklasses to print when printing klass") \
3039 \
3040 product(intx, MaxInlineLevel, 9, \
3041 "maximum number of nested calls that are inlined") \
3042 \
3043 product(intx, MaxRecursiveInlineLevel, 1, \
3044 "maximum number of nested recursive calls that are inlined") \
3045 \
3046 product_pd(intx, InlineSmallCode, \
3047 "Only inline already compiled methods if their code size is " \
3048 "less than this") \
3049 \
3050 product(intx, MaxInlineSize, 35, \
3051 "maximum bytecode size of a method to be inlined") \
3052 \
3053 product_pd(intx, FreqInlineSize, \
3054 "maximum bytecode size of a frequent method to be inlined") \
3055 \
3056 product(intx, MaxTrivialSize, 6, \
3057 "maximum bytecode size of a trivial method to be inlined") \
3058 \
3059 product(intx, MinInliningThreshold, 250, \
3060 "min. invocation count a method needs to have to be inlined") \
3061 \
3062 develop(intx, AlignEntryCode, 4, \
3063 "aligns entry code to specified value (in bytes)") \
3064 \
3065 develop(intx, MethodHistogramCutoff, 100, \
3066 "cutoff value for method invoc. histogram (+CountCalls)") \
3067 \
3068 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
3069 "# of interpreted methods to show in profile") \
3070 \
3071 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
3072 "# of compiled methods to show in profile") \
3073 \
3074 develop(intx, ProfilerNumberOfStubMethods, 25, \
3075 "# of stub methods to show in profile") \
3076 \
3077 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
3078 "# of runtime stub nodes to show in profile") \
3079 \
3080 product(intx, ProfileIntervalsTicks, 100, \
3081 "# of ticks between printing of interval profile " \
3082 "(+ProfileIntervals)") \
3083 \
3084 notproduct(intx, ScavengeALotInterval, 1, \
3085 "Interval between which scavenge will occur with +ScavengeALot") \
3086 \
3087 notproduct(intx, FullGCALotInterval, 1, \
3088 "Interval between which full gc will occur with +FullGCALot") \
3089 \
3090 notproduct(intx, FullGCALotStart, 0, \
3091 "For which invocation to start FullGCAlot") \
3092 \
3093 notproduct(intx, FullGCALotDummies, 32*K, \
3094 "Dummy object allocated with +FullGCALot, forcing all objects " \
3095 "to move") \
3096 \
3097 develop(intx, DontYieldALotInterval, 10, \
3098 "Interval between which yields will be dropped (milliseconds)") \
3099 \
3100 develop(intx, MinSleepInterval, 1, \
3101 "Minimum sleep() interval (milliseconds) when " \
3102 "ConvertSleepToYield is off (used for SOLARIS)") \
3103 \
3104 product(intx, EventLogLength, 2000, \
3105 "maximum nof events in event log") \
3106 \
3107 develop(intx, ProfilerPCTickThreshold, 15, \
3108 "Number of ticks in a PC buckets to be a hotspot") \
3109 \
3110 notproduct(intx, DeoptimizeALotInterval, 5, \
3111 "Number of exits until DeoptimizeALot kicks in") \
3112 \
3113 notproduct(intx, ZombieALotInterval, 5, \
3114 "Number of exits until ZombieALot kicks in") \
3115 \
3116 develop(bool, StressNonEntrant, false, \
3117 "Mark nmethods non-entrant at registration") \
3118 \
3119 diagnostic(intx, MallocVerifyInterval, 0, \
3120 "if non-zero, verify C heap after every N calls to " \
3121 "malloc/realloc/free") \
3122 \
3123 diagnostic(intx, MallocVerifyStart, 0, \
3124 "if non-zero, start verifying C heap after Nth call to " \
3125 "malloc/realloc/free") \
3126 \
3127 product(intx, TypeProfileWidth, 2, \
3128 "number of receiver types to record in call/cast profile") \
3129 \
3130 develop(intx, BciProfileWidth, 2, \
3131 "number of return bci's to record in ret profile") \
3132 \
3133 product(intx, PerMethodRecompilationCutoff, 400, \
3134 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3135 \
3136 product(intx, PerBytecodeRecompilationCutoff, 200, \
3137 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
3138 \
3139 product(intx, PerMethodTrapLimit, 100, \
3140 "Limit on traps (of one kind) in a method (includes inlines)") \
3141 \
3142 product(intx, PerBytecodeTrapLimit, 4, \
3143 "Limit on traps (of one kind) at a particular BCI") \
3144 \
3145 develop(intx, FreqCountInvocations, 1, \
3146 "Scaling factor for branch frequencies (deprecated)") \
3147 \
3148 develop(intx, InlineFrequencyRatio, 20, \
3149 "Ratio of call site execution to caller method invocation") \
3150 \
3151 develop_pd(intx, InlineFrequencyCount, \
3152 "Count of call site execution necessary to trigger frequent " \
3153 "inlining") \
3154 \
3155 develop(intx, InlineThrowCount, 50, \
3156 "Force inlining of interpreted methods that throw this often") \
3157 \
3158 develop(intx, InlineThrowMaxSize, 200, \
3159 "Force inlining of throwing methods smaller than this") \
3160 \
3161 product(intx, AliasLevel, 3, \
3162 "0 for no aliasing, 1 for oop/field/static/array split, " \
3163 "2 for class split, 3 for unique instances") \
3164 \
3165 develop(bool, VerifyAliases, false, \
3166 "perform extra checks on the results of alias analysis") \
3167 \
3168 develop(intx, ProfilerNodeSize, 1024, \
3169 "Size in K to allocate for the Profile Nodes of each thread") \
3170 \
3171 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \
3172 "Number of times to spin wait on a v8 atomic operation lock") \
3173 \
3174 product(intx, ReadSpinIterations, 100, \
3175 "Number of read attempts before a yield (spin inner loop)") \
3176 \
3177 product_pd(intx, PreInflateSpin, \
3178 "Number of times to spin wait before inflation") \
3179 \
3180 product(intx, PreBlockSpin, 10, \
3181 "Number of times to spin in an inflated lock before going to " \
3182 "an OS lock") \
3183 \
3184 /* gc parameters */ \
3185 product(uintx, InitialHeapSize, 0, \
3186 "Initial heap size (in bytes); zero means OldSize + NewSize") \
3187 \
3188 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \
3189 "Maximum heap size (in bytes)") \
3190 \
3191 product(uintx, OldSize, ScaleForWordSize(4*M), \
3192 "Initial tenured generation size (in bytes)") \
3193 \
3194 product(uintx, NewSize, ScaleForWordSize(1*M), \
3195 "Initial new generation size (in bytes)") \
3196 \
3197 product(uintx, MaxNewSize, max_uintx, \
3198 "Maximum new generation size (in bytes), max_uintx means set " \
3199 "ergonomically") \
3200 \
3201 product(uintx, PretenureSizeThreshold, 0, \
3202 "Maximum size in bytes of objects allocated in DefNew " \
3203 "generation; zero means no maximum") \
3204 \
3205 product(uintx, TLABSize, 0, \
3206 "Starting TLAB size (in bytes); zero means set ergonomically") \
3207 \
3208 product(uintx, MinTLABSize, 2*K, \
3209 "Minimum allowed TLAB size (in bytes)") \
3210 \
3211 product(uintx, TLABAllocationWeight, 35, \
3212 "Allocation averaging weight") \
3213 \
3214 product(uintx, TLABWasteTargetPercent, 1, \
3215 "Percentage of Eden that can be wasted") \
3216 \
3217 product(uintx, TLABRefillWasteFraction, 64, \
3218 "Max TLAB waste at a refill (internal fragmentation)") \
3219 \
3220 product(uintx, TLABWasteIncrement, 4, \
3221 "Increment allowed waste at slow allocation") \
3222 \
3223 product(intx, SurvivorRatio, 8, \
3224 "Ratio of eden/survivor space size") \
3225 \
3226 product(intx, NewRatio, 2, \
3227 "Ratio of new/old generation sizes") \
3228 \
3229 product_pd(uintx, NewSizeThreadIncrease, \
3230 "Additional size added to desired new generation size per " \
3231 "non-daemon thread (in bytes)") \
3232 \
3233 product_pd(uintx, PermSize, \
3234 "Initial size of permanent generation (in bytes)") \
3235 \
3236 product_pd(uintx, MaxPermSize, \
3237 "Maximum size of permanent generation (in bytes)") \
3238 \
3239 product(uintx, MinHeapFreeRatio, 40, \
3240 "Min percentage of heap free after GC to avoid expansion") \
3241 \
3242 product(uintx, MaxHeapFreeRatio, 70, \
3243 "Max percentage of heap free after GC to avoid shrinking") \
3244 \
3245 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
3246 "Number of milliseconds per MB of free space in the heap") \
3247 \
3248 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
3249 "Min change in heap space due to GC (in bytes)") \
3250 \
3251 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \
3252 "Min expansion of permanent heap (in bytes)") \
3253 \
3254 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \
3255 "Max expansion of permanent heap without full GC (in bytes)") \
3256 \
3257 product(intx, QueuedAllocationWarningCount, 0, \
3258 "Number of times an allocation that queues behind a GC " \
3259 "will retry before printing a warning") \
3260 \
3261 diagnostic(uintx, VerifyGCStartAt, 0, \
3262 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3263 \
3264 diagnostic(intx, VerifyGCLevel, 0, \
3265 "Generation level at which to start +VerifyBefore/AfterGC") \
3266 \
3267 develop(uintx, ExitAfterGCNum, 0, \
3268 "If non-zero, exit after this GC.") \
3269 \
3270 product(intx, MaxTenuringThreshold, 15, \
3271 "Maximum value for tenuring threshold") \
3272 \
3273 product(intx, InitialTenuringThreshold, 7, \
3274 "Initial value for tenuring threshold") \
3275 \
3276 product(intx, TargetSurvivorRatio, 50, \
3277 "Desired percentage of survivor space used after scavenge") \
3278 \
3279 product(uintx, MarkSweepDeadRatio, 5, \
3280 "Percentage (0-100) of the old gen allowed as dead wood." \
3281 "Serial mark sweep treats this as both the min and max value." \
3282 "CMS uses this value only if it falls back to mark sweep." \
3283 "Par compact uses a variable scale based on the density of the" \
3284 "generation and treats this as the max value when the heap is" \
3285 "either completely full or completely empty. Par compact also" \
3286 "has a smaller default value; see arguments.cpp.") \
3287 \
3288 product(uintx, PermMarkSweepDeadRatio, 20, \
3289 "Percentage (0-100) of the perm gen allowed as dead wood." \
3290 "See MarkSweepDeadRatio for collector-specific comments.") \
3291 \
3292 product(intx, MarkSweepAlwaysCompactCount, 4, \
3293 "How often should we fully compact the heap (ignoring the dead " \
3294 "space parameters)") \
3295 \
3296 product(intx, PrintCMSStatistics, 0, \
3297 "Statistics for CMS") \
3298 \
3299 product(bool, PrintCMSInitiationStatistics, false, \
3300 "Statistics for initiating a CMS collection") \
3301 \
3302 product(intx, PrintFLSStatistics, 0, \
3303 "Statistics for CMS' FreeListSpace") \
3304 \
3305 product(intx, PrintFLSCensus, 0, \
3306 "Census for CMS' FreeListSpace") \
3307 \
3308 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3309 "Delay in ms between expansion and allocation") \
3310 \
3311 product(intx, DeferThrSuspendLoopCount, 4000, \
3312 "(Unstable) Number of times to iterate in safepoint loop " \
3313 " before blocking VM threads ") \
3314 \
3315 product(intx, DeferPollingPageLoopCount, -1, \
3316 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3317 "before changing safepoint polling page to RO ") \
3318 \
3319 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3320 \
3321 product(bool, PSChunkLargeArrays, true, \
3322 "true: process large arrays in chunks") \
3323 \
3324 product(uintx, GCDrainStackTargetSize, 64, \
3325 "how many entries we'll try to leave on the stack during " \
3326 "parallel GC") \
3327 \
3328 /* stack parameters */ \
3329 product_pd(intx, StackYellowPages, \
3330 "Number of yellow zone (recoverable overflows) pages") \
3331 \
3332 product_pd(intx, StackRedPages, \
3333 "Number of red zone (unrecoverable overflows) pages") \
3334 \
3335 product_pd(intx, StackShadowPages, \
3336 "Number of shadow zone (for overflow checking) pages" \
3337 " this should exceed the depth of the VM and native call stack") \
3338 \
3339 product_pd(intx, ThreadStackSize, \
3340 "Thread Stack Size (in Kbytes)") \
3341 \
3342 product_pd(intx, VMThreadStackSize, \
3343 "Non-Java Thread Stack Size (in Kbytes)") \
3344 \
3345 product_pd(intx, CompilerThreadStackSize, \
3346 "Compiler Thread Stack Size (in Kbytes)") \
3347 \
3348 develop_pd(uintx, JVMInvokeMethodSlack, \
3349 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3350 \
3351 product(uintx, ThreadSafetyMargin, 50*M, \
3352 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
3353 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
3354 "disable this feature") \
3355 \
3356 /* code cache parameters */ \
3357 develop(uintx, CodeCacheSegmentSize, 64, \
3358 "Code cache segment size (in bytes) - smallest unit of " \
3359 "allocation") \
3360 \
3361 develop_pd(intx, CodeEntryAlignment, \
3362 "Code entry alignment for generated code (in bytes)") \
3363 \
3364 product_pd(intx, OptoLoopAlignment, \
3365 "Align inner loops to zero relative to this modulus") \
3366 \
3367 product_pd(uintx, InitialCodeCacheSize, \
3368 "Initial code cache size (in bytes)") \
3369 \
3370 product_pd(uintx, ReservedCodeCacheSize, \
3371 "Reserved code cache size (in bytes) - maximum code cache size") \
3372 \
3373 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
3374 "When less than X space left, we stop compiling.") \
3375 \
3376 product_pd(uintx, CodeCacheExpansionSize, \
3377 "Code cache expansion size (in bytes)") \
3378 \
3379 develop_pd(uintx, CodeCacheMinBlockLength, \
3380 "Minimum number of segments in a code cache block.") \
3381 \
3382 notproduct(bool, ExitOnFullCodeCache, false, \
3383 "Exit the VM if we fill the code cache.") \
3384 \
3385 product(bool, UseCodeCacheFlushing, true, \
3386 "Attempt to clean the code cache before shutting off compiler") \
3387 \
3388 product(intx, MinCodeCacheFlushingInterval, 30, \
3389 "Min number of seconds between code cache cleaning sessions") \
3390 \
3391 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \
3392 "When less than X space left, start code cache cleaning") \
3393 \
3394 /* interpreter debugging */ \
3395 develop(intx, BinarySwitchThreshold, 5, \
3396 "Minimal number of lookupswitch entries for rewriting to binary " \
3397 "switch") \
3398 \
3399 develop(intx, StopInterpreterAt, 0, \
3400 "Stops interpreter execution at specified bytecode number") \
3401 \
3402 develop(intx, TraceBytecodesAt, 0, \
3403 "Traces bytecodes starting with specified bytecode number") \
3404 \
3405 /* compiler interface */ \
3406 develop(intx, CIStart, 0, \
3407 "the id of the first compilation to permit") \
3408 \
3409 develop(intx, CIStop, -1, \
3410 "the id of the last compilation to permit") \
3411 \
3412 develop(intx, CIStartOSR, 0, \
3413 "the id of the first osr compilation to permit " \
3414 "(CICountOSR must be on)") \
3415 \
3416 develop(intx, CIStopOSR, -1, \
3417 "the id of the last osr compilation to permit " \
3418 "(CICountOSR must be on)") \
3419 \
3420 develop(intx, CIBreakAtOSR, -1, \
3421 "id of osr compilation to break at") \
3422 \
3423 develop(intx, CIBreakAt, -1, \
3424 "id of compilation to break at") \
3425 \
3426 product(ccstrlist, CompileOnly, "", \
3427 "List of methods (pkg/class.name) to restrict compilation to") \
3428 \
3429 product(ccstr, CompileCommandFile, NULL, \
3430 "Read compiler commands from this file [.hotspot_compiler]") \
3431 \
3432 product(ccstrlist, CompileCommand, "", \
3433 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3434 \
3435 product(bool, CICompilerCountPerCPU, false, \
3436 "1 compiler thread for log(N CPUs)") \
3437 \
3438 develop(intx, CIFireOOMAt, -1, \
3439 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3440 "(non-negative value throws OOM after this many CI accesses " \
3441 "in each compile)") \
3442 \
3443 develop(intx, CIFireOOMAtDelay, -1, \
3444 "Wait for this many CI accesses to occur in all compiles before " \
3445 "beginning to throw OutOfMemoryErrors in each compile") \
3446 \
3447 notproduct(bool, CIObjectFactoryVerify, false, \
3448 "enable potentially expensive verification in ciObjectFactory") \
3449 \
3450 /* Priorities */ \
3451 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3452 \
3453 product(intx, ThreadPriorityPolicy, 0, \
3454 "0 : Normal. "\
3455 " VM chooses priorities that are appropriate for normal "\
3456 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3457 " to normal native priority. Java priorities below NORM_PRIORITY"\
3458 " map to lower native priority values. On Windows applications"\
3459 " are allowed to use higher native priorities. However, with "\
3460 " ThreadPriorityPolicy=0, VM will not use the highest possible"\
3461 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\
3462 " interfere with system threads. On Linux thread priorities "\
3463 " are ignored because the OS does not support static priority "\
3464 " in SCHED_OTHER scheduling class which is the only choice for"\
3465 " non-root, non-realtime applications. "\
3466 "1 : Aggressive. "\
3467 " Java thread priorities map over to the entire range of "\
3468 " native thread priorities. Higher Java thread priorities map "\
3469 " to higher native thread priorities. This policy should be "\
3470 " used with care, as sometimes it can cause performance "\
3471 " degradation in the application and/or the entire system. On "\
3472 " Linux this policy requires root privilege.") \
3473 \
3474 product(bool, ThreadPriorityVerbose, false, \
3475 "print priority changes") \
3476 \
3477 product(intx, DefaultThreadPriority, -1, \
3478 "what native priority threads run at if not specified elsewhere (-1 means no change)") \
3479 \
3480 product(intx, CompilerThreadPriority, -1, \
3481 "what priority should compiler threads run at (-1 means no change)") \
3482 \
3483 product(intx, VMThreadPriority, -1, \
3484 "what priority should VM threads run at (-1 means no change)") \
3485 \
3486 product(bool, CompilerThreadHintNoPreempt, true, \
3487 "(Solaris only) Give compiler threads an extra quanta") \
3488 \
3489 product(bool, VMThreadHintNoPreempt, false, \
3490 "(Solaris only) Give VM thread an extra quanta") \
3491 \
3492 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3493 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3494 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3495 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3496 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3497 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3498 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3499 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3500 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3501 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \
3502 \
3503 /* compiler debugging */ \
3504 notproduct(intx, CompileTheWorldStartAt, 1, \
3505 "First class to consider when using +CompileTheWorld") \
3506 \
3507 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3508 "Last class to consider when using +CompileTheWorld") \
3509 \
3510 develop(intx, NewCodeParameter, 0, \
3511 "Testing Only: Create a dedicated integer parameter before " \
3512 "putback") \
3513 \
3514 /* new oopmap storage allocation */ \
3515 develop(intx, MinOopMapAllocation, 8, \
3516 "Minimum number of OopMap entries in an OopMapSet") \
3517 \
3518 /* Background Compilation */ \
3519 develop(intx, LongCompileThreshold, 50, \
3520 "Used with +TraceLongCompiles") \
3521 \
3522 product(intx, StarvationMonitorInterval, 200, \
3523 "Pause between each check in ms") \
3524 \
3525 /* recompilation */ \
3526 product_pd(intx, CompileThreshold, \
3527 "number of interpreted method invocations before (re-)compiling") \
3528 \
3529 product_pd(intx, BackEdgeThreshold, \
3530 "Interpreter Back edge threshold at which an OSR compilation is invoked")\
3531 \
3532 product(intx, Tier0InvokeNotifyFreqLog, 7, \
3533 "Interpreter (tier 0) invocation notification frequency.") \
3534 \
3535 product(intx, Tier2InvokeNotifyFreqLog, 11, \
3536 "C1 without MDO (tier 2) invocation notification frequency.") \
3537 \
3538 product(intx, Tier3InvokeNotifyFreqLog, 10, \
3539 "C1 with MDO profiling (tier 3) invocation notification " \
3540 "frequency.") \
3541 \
3542 product(intx, Tier23InlineeNotifyFreqLog, 20, \
3543 "Inlinee invocation (tiers 2 and 3) notification frequency") \
3544 \
3545 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
3546 "Interpreter (tier 0) invocation notification frequency.") \
3547 \
3548 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
3549 "C1 without MDO (tier 2) invocation notification frequency.") \
3550 \
3551 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
3552 "C1 with MDO profiling (tier 3) invocation notification " \
3553 "frequency.") \
3554 \
3555 product(intx, Tier2CompileThreshold, 0, \
3556 "threshold at which tier 2 compilation is invoked") \
3557 \
3558 product(intx, Tier2BackEdgeThreshold, 0, \
3559 "Back edge threshold at which tier 2 compilation is invoked") \
3560 \
3561 product(intx, Tier3InvocationThreshold, 200, \
3562 "Compile if number of method invocations crosses this " \
3563 "threshold") \
3564 \
3565 product(intx, Tier3MinInvocationThreshold, 100, \
3566 "Minimum invocation to compile at tier 3") \
3567 \
3568 product(intx, Tier3CompileThreshold, 2000, \
3569 "Threshold at which tier 3 compilation is invoked (invocation " \
3570 "minimum must be satisfied.") \
3571 \
3572 product(intx, Tier3BackEdgeThreshold, 7000, \
3573 "Back edge threshold at which tier 3 OSR compilation is invoked") \
3574 \
3575 product(intx, Tier4InvocationThreshold, 5000, \
3576 "Compile if number of method invocations crosses this " \
3577 "threshold") \
3578 \
3579 product(intx, Tier4MinInvocationThreshold, 600, \
3580 "Minimum invocation to compile at tier 4") \
3581 \
3582 product(intx, Tier4CompileThreshold, 15000, \
3583 "Threshold at which tier 4 compilation is invoked (invocation " \
3584 "minimum must be satisfied.") \
3585 \
3586 product(intx, Tier4BackEdgeThreshold, 40000, \
3587 "Back edge threshold at which tier 4 OSR compilation is invoked") \
3588 \
3589 product(intx, Tier3DelayOn, 5, \
3590 "If C2 queue size grows over this amount per compiler thread " \
3591 "stop compiling at tier 3 and start compiling at tier 2") \
3592 \
3593 product(intx, Tier3DelayOff, 2, \
3594 "If C2 queue size is less than this amount per compiler thread " \
3595 "allow methods compiled at tier 2 transition to tier 3") \
3596 \
3597 product(intx, Tier3LoadFeedback, 5, \
3598 "Tier 3 thresholds will increase twofold when C1 queue size " \
3599 "reaches this amount per compiler thread") \
3600 \
3601 product(intx, Tier4LoadFeedback, 3, \
3602 "Tier 4 thresholds will increase twofold when C2 queue size " \
3603 "reaches this amount per compiler thread") \
3604 \
3605 product(intx, TieredCompileTaskTimeout, 50, \
3606 "Kill compile task if method was not used within " \
3607 "given timeout in milliseconds") \
3608 \
3609 product(intx, TieredStopAtLevel, 4, \
3610 "Stop at given compilation level") \
3611 \
3612 product(intx, Tier0ProfilingStartPercentage, 200, \
3613 "Start profiling in interpreter if the counters exceed tier 3" \
3614 "thresholds by the specified percentage") \
3615 \
3616 product(intx, TieredRateUpdateMinTime, 1, \
3617 "Minimum rate sampling interval (in milliseconds)") \
3618 \
3619 product(intx, TieredRateUpdateMaxTime, 25, \
3620 "Maximum rate sampling interval (in milliseconds)") \
3621 \
3622 product_pd(bool, TieredCompilation, \
3623 "Enable tiered compilation") \
3624 \
3625 product(bool, PrintTieredEvents, false, \
3626 "Print tiered events notifications") \
3627 \
3628 product(bool, StressTieredRuntime, false, \
3629 "Alternate client and server compiler on compile requests") \
3630 \
3631 product_pd(intx, OnStackReplacePercentage, \
3632 "NON_TIERED number of method invocations/branches (expressed as %"\
3633 "of CompileThreshold) before (re-)compiling OSR code") \
3634 \
3635 product(intx, InterpreterProfilePercentage, 33, \
3636 "NON_TIERED number of method invocations/branches (expressed as %"\
3637 "of CompileThreshold) before profiling in the interpreter") \
3638 \
3639 develop(intx, MaxRecompilationSearchLength, 10, \
3640 "max. # frames to inspect searching for recompilee") \
3641 \
3642 develop(intx, MaxInterpretedSearchLength, 3, \
3643 "max. # interp. frames to skip when searching for recompilee") \
3644 \
3645 develop(intx, DesiredMethodLimit, 8000, \
3646 "desired max. method size (in bytecodes) after inlining") \
3647 \
3648 develop(intx, HugeMethodLimit, 8000, \
3649 "don't compile methods larger than this if " \
3650 "+DontCompileHugeMethods") \
3651 \
3652 /* New JDK 1.4 reflection implementation */ \
3653 \
3654 develop(bool, UseNewReflection, true, \
3655 "Temporary flag for transition to reflection based on dynamic " \
3656 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3657 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3658 "changes were needed") \
3659 \
3660 develop(bool, VerifyReflectionBytecodes, false, \
3661 "Force verification of 1.4 reflection bytecodes. Does not work " \
3662 "in situations like that described in 4486457 or for " \
3663 "constructors generated for serialization, so can not be enabled "\
3664 "in product.") \
3665 \
3666 product(bool, ReflectionWrapResolutionErrors, true, \
3667 "Temporary flag for transition to AbstractMethodError wrapped " \
3668 "in InvocationTargetException. See 6531596") \
3669 \
3670 \
3671 develop(intx, FastSuperclassLimit, 8, \
3672 "Depth of hardwired instanceof accelerator array") \
3673 \
3674 /* Properties for Java libraries */ \
3675 \
3676 product(intx, MaxDirectMemorySize, -1, \
3677 "Maximum total size of NIO direct-buffer allocations") \
3678 \
3679 /* temporary developer defined flags */ \
3680 \
3681 diagnostic(bool, UseNewCode, false, \
3682 "Testing Only: Use the new version while testing") \
3683 \
3684 diagnostic(bool, UseNewCode2, false, \
3685 "Testing Only: Use the new version while testing") \
3686 \
3687 diagnostic(bool, UseNewCode3, false, \
3688 "Testing Only: Use the new version while testing") \
3689 \
3690 /* flags for performance data collection */ \
3691 \
3692 product(bool, UsePerfData, falseInEmbedded, \
3693 "Flag to disable jvmstat instrumentation for performance testing" \
3694 "and problem isolation purposes.") \
3695 \
3696 product(bool, PerfDataSaveToFile, false, \
3697 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3698 \
3699 product(ccstr, PerfDataSaveFile, NULL, \
3700 "Save PerfData memory to the specified absolute pathname," \
3701 "%p in the file name if present will be replaced by pid") \
3702 \
3703 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \
3704 "Data sampling interval in milliseconds") \
3705 \
3706 develop(bool, PerfTraceDataCreation, false, \
3707 "Trace creation of Performance Data Entries") \
3708 \
3709 develop(bool, PerfTraceMemOps, false, \
3710 "Trace PerfMemory create/attach/detach calls") \
3711 \
3712 product(bool, PerfDisableSharedMem, false, \
3713 "Store performance data in standard memory") \
3714 \
3715 product(intx, PerfDataMemorySize, 32*K, \
3716 "Size of performance data memory region. Will be rounded " \
3717 "up to a multiple of the native os page size.") \
3718 \
3719 product(intx, PerfMaxStringConstLength, 1024, \
3720 "Maximum PerfStringConstant string length before truncation") \
3721 \
3722 product(bool, PerfAllowAtExitRegistration, false, \
3723 "Allow registration of atexit() methods") \
3724 \
3725 product(bool, PerfBypassFileSystemCheck, false, \
3726 "Bypass Win32 file system criteria checks (Windows Only)") \
3727 \
3728 product(intx, UnguardOnExecutionViolation, 0, \
3729 "Unguard page and retry on no-execute fault (Win32 only)" \
3730 "0=off, 1=conservative, 2=aggressive") \
3731 \
3732 /* Serviceability Support */ \
3733 \
3734 product(bool, ManagementServer, false, \
3735 "Create JMX Management Server") \
3736 \
3737 product(bool, DisableAttachMechanism, false, \
3738 "Disable mechanism that allows tools to attach to this VM") \
3739 \
3740 product(bool, StartAttachListener, false, \
3741 "Always start Attach Listener at VM startup") \
3742 \
3743 manageable(bool, PrintConcurrentLocks, false, \
3744 "Print java.util.concurrent locks in thread dump") \
3745 \
3746 product(bool, TransmitErrorReport, false, \
3747 "Enable error report transmission on erroneous termination") \
3748 \
3749 product(ccstr, ErrorReportServer, NULL, \
3750 "Override built-in error report server address") \
3751 \
3752 /* Shared spaces */ \
3753 \
3754 product(bool, UseSharedSpaces, true, \
3755 "Use shared spaces in the permanent generation") \
3756 \
3757 product(bool, RequireSharedSpaces, false, \
3758 "Require shared spaces in the permanent generation") \
3759 \
3760 product(bool, DumpSharedSpaces, false, \
3761 "Special mode: JVM reads a class list, loads classes, builds " \
3762 "shared spaces, and dumps the shared spaces to a file to be " \
3763 "used in future JVM runs.") \
3764 \
3765 product(bool, PrintSharedSpaces, false, \
3766 "Print usage of shared spaces") \
3767 \
3768 product(uintx, SharedDummyBlockSize, 512*M, \
3769 "Size of dummy block used to shift heap addresses (in bytes)") \
3770 \
3771 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(13*M), \
3772 "Size of read-write space in permanent generation (in bytes)") \
3773 \
3774 product(uintx, SharedReadOnlySize, 10*M, \
3775 "Size of read-only space in permanent generation (in bytes)") \
3776 \
3777 product(uintx, SharedMiscDataSize, NOT_LP64(4*M) LP64_ONLY(5*M), \
3778 "Size of the shared data area adjacent to the heap (in bytes)") \
3779 \
3780 product(uintx, SharedMiscCodeSize, 4*M, \
3781 "Size of the shared code area adjacent to the heap (in bytes)") \
3782 \
3783 diagnostic(bool, SharedOptimizeColdStart, true, \
3784 "At dump time, order shared objects to achieve better " \
3785 "cold startup time.") \
3786 \
3787 develop(intx, SharedOptimizeColdStartPolicy, 2, \
3788 "Reordering policy for SharedOptimizeColdStart " \
3789 "0=favor classload-time locality, 1=balanced, " \
3790 "2=favor runtime locality") \
3791 \
3792 diagnostic(bool, SharedSkipVerify, false, \
3793 "Skip assert() and verify() which page-in unwanted shared " \
3794 "objects. ") \
3795 \
3796 diagnostic(bool, EnableInvokeDynamic, true, \
3797 "support JSR 292 (method handles, invokedynamic, " \
3798 "anonymous classes") \
3799 \
3800 product(bool, AnonymousClasses, false, \
3801 "support sun.misc.Unsafe.defineAnonymousClass (deprecated)") \
3802 \
3803 experimental(bool, EnableMethodHandles, false, \
3804 "support method handles (deprecated)") \
3805 \
3806 diagnostic(intx, MethodHandlePushLimit, 3, \
3807 "number of additional stack slots a method handle may push") \
3808 \
3809 diagnostic(bool, PrintMethodHandleStubs, false, \
3810 "Print generated stub code for method handles") \
3811 \
3812 develop(bool, TraceMethodHandles, false, \
3813 "trace internal method handle operations") \
3814 \
3815 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
3816 "perform extra checks when constructing method handles") \
3817 \
3818 diagnostic(bool, OptimizeMethodHandles, true, \
3819 "when constructing method handles, try to improve them") \
3820 \
3821 develop(bool, StressMethodHandleWalk, false, \
3822 "Process all method handles with MethodHandleWalk") \
3823 \
3824 diagnostic(bool, UseRicochetFrames, true, \
3825 "use ricochet stack frames for method handle combination, " \
3826 "if the platform supports them") \
3827 \
3828 experimental(bool, TrustFinalNonStaticFields, false, \
3829 "trust final non-static declarations for constant folding") \
3830 \
3831 experimental(bool, AllowInvokeGeneric, false, \
3832 "accept MethodHandle.invoke and MethodHandle.invokeGeneric " \
3833 "as equivalent methods") \
3834 \
3835 develop(bool, TraceInvokeDynamic, false, \
3836 "trace internal invoke dynamic operations") \
3837 \
3838 diagnostic(bool, PauseAtStartup, false, \
3839 "Causes the VM to pause at startup time and wait for the pause " \
3840 "file to be removed (default: ./vm.paused.<pid>)") \
3841 \
3842 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3843 "The file to create and for whose removal to await when pausing " \
3844 "at startup. (default: ./vm.paused.<pid>)") \
3845 \
3846 diagnostic(bool, PauseAtExit, false, \
3847 "Pause and wait for keypress on exit if a debugger is attached") \
3848 \
3849 product(bool, ExtendedDTraceProbes, false, \
3850 "Enable performance-impacting dtrace probes") \
3851 \
3852 product(bool, DTraceMethodProbes, false, \
3853 "Enable dtrace probes for method-entry and method-exit") \
3854 \
3855 product(bool, DTraceAllocProbes, false, \
3856 "Enable dtrace probes for object allocation") \
3857 \
3858 product(bool, DTraceMonitorProbes, false, \
3859 "Enable dtrace probes for monitor events") \
3860 \
3861 product(bool, RelaxAccessControlCheck, false, \
3862 "Relax the access control checks in the verifier") \
3863 \
3864 diagnostic(bool, PrintDTraceDOF, false, \
3865 "Print the DTrace DOF passed to the system for JSDT probes") \
3866 \
3867 product(uintx, StringTableSize, 1009, \
3868 "Number of buckets in the interned String table") \
3869 \
3870 product(bool, UseVMInterruptibleIO, false, \
3871 "(Unstable, Solaris-specific) Thread interrupt before or with " \
3872 "EINTR for I/O operations results in OS_INTRPT. The default value"\
3873 " of this flag is true for JDK 6 and earliers")
3875 /*
3876 * Macros for factoring of globals
3877 */
3879 // Interface macros
3880 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3881 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
3882 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3883 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3884 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3885 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3886 #ifdef PRODUCT
3887 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value;
3888 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name;
3889 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)
3890 #else
3891 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
3892 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
3893 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3894 #endif
3895 // Special LP64 flags, product only needed for now.
3896 #ifdef _LP64
3897 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3898 #else
3899 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3900 #endif // _LP64
3902 // Implementation macros
3903 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
3904 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
3905 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
3906 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3907 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
3908 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
3909 #ifdef PRODUCT
3910 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */
3911 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */
3912 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
3913 #else
3914 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
3915 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
3916 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
3917 #endif
3918 #ifdef _LP64
3919 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3920 #else
3921 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3922 #endif // _LP64
3924 RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG)
3926 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
3928 // Extensions
3930 #include "runtime/globals_ext.hpp"
3932 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP
