1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_RUNTIME_ARGUMENTS_HPP
26 #define SHARE_VM_RUNTIME_ARGUMENTS_HPP
27
28 #include "runtime/java.hpp"
29 #include "runtime/os.hpp"
30 #include "runtime/perfData.hpp"
31 #include "utilities/debug.hpp"
32 #include "utilities/top.hpp"
33
34 // Arguments parses the command line and recognizes options
35
36 // Invocation API hook typedefs (these should really be defined in jni.hpp)
37 extern "C" {
38 typedef void (JNICALL *abort_hook_t)(void);
39 typedef void (JNICALL *exit_hook_t)(jint code);
40 typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args) ATTRIBUTE_PRINTF(2, 0);
41 }
42
43 // Forward declarations
44
45 class SysClassPath;
46
47 // Element describing System and User (-Dkey=value flags) defined property.
48
49 class SystemProperty: public CHeapObj<mtInternal> {
50 private:
51 char* _key;
52 char* _value;
53 SystemProperty* _next;
54 bool _writeable;
55 bool writeable() { return _writeable; }
56
57 public:
58 // Accessors
59 const char* key() const { return _key; }
60 char* value() const { return _value; }
61 SystemProperty* next() const { return _next; }
62 void set_next(SystemProperty* next) { _next = next; }
63 bool set_value(const char *value) {
64 if (writeable()) {
65 if (_value != NULL) {
66 FreeHeap(_value);
67 }
68 _value = AllocateHeap(strlen(value)+1, mtInternal);
69 if (_value != NULL) {
70 strcpy(_value, value);
71 }
72 return true;
73 }
74 return false;
75 }
76
77 void append_value(const char *value) {
78 char *sp;
79 size_t len = 0;
80 if (value != NULL) {
81 len = strlen(value);
82 if (_value != NULL) {
83 len += strlen(_value);
84 }
85 sp = AllocateHeap(len+2, mtInternal);
86 if (sp != NULL) {
87 if (_value != NULL) {
88 strcpy(sp, _value);
89 strcat(sp, os::path_separator());
90 strcat(sp, value);
91 FreeHeap(_value);
92 } else {
93 strcpy(sp, value);
94 }
95 _value = sp;
96 }
97 }
98 }
99
100 // Constructor
101 SystemProperty(const char* key, const char* value, bool writeable) {
102 if (key == NULL) {
103 _key = NULL;
104 } else {
105 _key = AllocateHeap(strlen(key)+1, mtInternal);
106 strcpy(_key, key);
107 }
108 if (value == NULL) {
109 _value = NULL;
110 } else {
111 _value = AllocateHeap(strlen(value)+1, mtInternal);
112 strcpy(_value, value);
113 }
114 _next = NULL;
115 _writeable = writeable;
116 }
117 };
118
119
120 // For use by -agentlib, -agentpath and -Xrun
121 class AgentLibrary : public CHeapObj<mtInternal> {
122 friend class AgentLibraryList;
123 public:
124 // Is this library valid or not. Don't rely on os_lib == NULL as statically
125 // linked lib could have handle of RTLD_DEFAULT which == 0 on some platforms
126 enum AgentState {
127 agent_invalid = 0,
128 agent_valid = 1
129 };
130
131 private:
132 char* _name;
133 char* _options;
134 void* _os_lib;
135 bool _is_absolute_path;
136 bool _is_static_lib;
137 AgentState _state;
138 AgentLibrary* _next;
139
140 public:
141 // Accessors
142 const char* name() const { return _name; }
143 char* options() const { return _options; }
144 bool is_absolute_path() const { return _is_absolute_path; }
145 void* os_lib() const { return _os_lib; }
146 void set_os_lib(void* os_lib) { _os_lib = os_lib; }
147 AgentLibrary* next() const { return _next; }
148 bool is_static_lib() const { return _is_static_lib; }
149 void set_static_lib(bool is_static_lib) { _is_static_lib = is_static_lib; }
150 bool valid() { return (_state == agent_valid); }
151 void set_valid() { _state = agent_valid; }
152 void set_invalid() { _state = agent_invalid; }
153
154 // Constructor
155 AgentLibrary(const char* name, const char* options, bool is_absolute_path, void* os_lib) {
156 _name = AllocateHeap(strlen(name)+1, mtInternal);
157 strcpy(_name, name);
158 if (options == NULL) {
159 _options = NULL;
160 } else {
161 _options = AllocateHeap(strlen(options)+1, mtInternal);
162 strcpy(_options, options);
163 }
164 _is_absolute_path = is_absolute_path;
165 _os_lib = os_lib;
166 _next = NULL;
167 _state = agent_invalid;
168 _is_static_lib = false;
169 }
170 };
171
172 // maintain an order of entry list of AgentLibrary
173 class AgentLibraryList VALUE_OBJ_CLASS_SPEC {
174 private:
175 AgentLibrary* _first;
176 AgentLibrary* _last;
177 public:
178 bool is_empty() const { return _first == NULL; }
179 AgentLibrary* first() const { return _first; }
180
181 // add to the end of the list
182 void add(AgentLibrary* lib) {
183 if (is_empty()) {
184 _first = _last = lib;
185 } else {
186 _last->_next = lib;
187 _last = lib;
188 }
189 lib->_next = NULL;
190 }
191
192 // search for and remove a library known to be in the list
193 void remove(AgentLibrary* lib) {
194 AgentLibrary* curr;
195 AgentLibrary* prev = NULL;
196 for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) {
197 if (curr == lib) {
198 break;
199 }
200 }
201 assert(curr != NULL, "always should be found");
202
203 if (curr != NULL) {
204 // it was found, by-pass this library
205 if (prev == NULL) {
206 _first = curr->_next;
207 } else {
208 prev->_next = curr->_next;
209 }
210 if (curr == _last) {
211 _last = prev;
212 }
213 curr->_next = NULL;
214 }
215 }
216
217 AgentLibraryList() {
218 _first = NULL;
219 _last = NULL;
220 }
221 };
222
223 // Helper class for controlling the lifetime of JavaVMInitArgs objects.
224 class ScopedVMInitArgs;
225
226 class Arguments : AllStatic {
227 friend class VMStructs;
228 friend class JvmtiExport;
229 friend class CodeCacheExtensions;
230 public:
231 // Operation modi
232 enum Mode {
233 _int, // corresponds to -Xint
234 _mixed, // corresponds to -Xmixed
235 _comp // corresponds to -Xcomp
236 };
237
238 enum ArgsRange {
239 arg_unreadable = -3,
240 arg_too_small = -2,
241 arg_too_big = -1,
242 arg_in_range = 0
243 };
244
245 private:
246
247 // a pointer to the flags file name if it is specified
248 static char* _jvm_flags_file;
249 // an array containing all flags specified in the .hotspotrc file
250 static char** _jvm_flags_array;
251 static int _num_jvm_flags;
252 // an array containing all jvm arguments specified in the command line
253 static char** _jvm_args_array;
254 static int _num_jvm_args;
255 // string containing all java command (class/jarfile name and app args)
256 static char* _java_command;
257
258 // Property list
259 static SystemProperty* _system_properties;
260
261 // Quick accessor to System properties in the list:
262 static SystemProperty *_sun_boot_library_path;
263 static SystemProperty *_java_library_path;
264 static SystemProperty *_java_home;
265 static SystemProperty *_java_class_path;
266 static SystemProperty *_sun_boot_class_path;
267
268 // temporary: to emit warning if the default ext dirs are not empty.
269 // remove this variable when the warning is no longer needed.
270 static char* _ext_dirs;
271
272 // java.vendor.url.bug, bug reporting URL for fatal errors.
273 static const char* _java_vendor_url_bug;
274
275 // sun.java.launcher, private property to provide information about
276 // java launcher
277 static const char* _sun_java_launcher;
278
279 // sun.java.launcher.pid, private property
280 static int _sun_java_launcher_pid;
281
282 // was this VM created via the -XXaltjvm=<path> option
283 static bool _sun_java_launcher_is_altjvm;
284
285 // Option flags
286 static bool _has_profile;
287 static const char* _gc_log_filename;
288 // Value of the conservative maximum heap alignment needed
289 static size_t _conservative_max_heap_alignment;
290
291 static uintx _min_heap_size;
292
293 // -Xrun arguments
294 static AgentLibraryList _libraryList;
295 static void add_init_library(const char* name, char* options)
296 { _libraryList.add(new AgentLibrary(name, options, false, NULL)); }
297
298 // -agentlib and -agentpath arguments
299 static AgentLibraryList _agentList;
300 static void add_init_agent(const char* name, char* options, bool absolute_path)
301 { _agentList.add(new AgentLibrary(name, options, absolute_path, NULL)); }
302
303 // Late-binding agents not started via arguments
304 static void add_loaded_agent(AgentLibrary *agentLib)
305 { _agentList.add(agentLib); }
306 static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib)
307 { _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib)); }
308
309 // Operation modi
310 static Mode _mode;
311 static void set_mode_flags(Mode mode);
312 static bool _java_compiler;
313 static void set_java_compiler(bool arg) { _java_compiler = arg; }
314 static bool java_compiler() { return _java_compiler; }
315
316 // -Xdebug flag
317 static bool _xdebug_mode;
318 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; }
319 static bool xdebug_mode() { return _xdebug_mode; }
320
321 // Used to save default settings
322 static bool _AlwaysCompileLoopMethods;
323 static bool _UseOnStackReplacement;
324 static bool _BackgroundCompilation;
325 static bool _ClipInlining;
326 static bool _CIDynamicCompilePriority;
327 static intx _Tier3InvokeNotifyFreqLog;
328 static intx _Tier4InvocationThreshold;
329
330 // Tiered
331 static void set_tiered_flags();
332 // CMS/ParNew garbage collectors
333 static void set_parnew_gc_flags();
334 static void set_cms_and_parnew_gc_flags();
335 // UseParallel[Old]GC
336 static void set_parallel_gc_flags();
337 // Garbage-First (UseG1GC)
338 static void set_g1_gc_flags();
339 // GC ergonomics
340 static void set_conservative_max_heap_alignment();
341 static void set_use_compressed_oops();
342 static void set_use_compressed_klass_ptrs();
343 static void select_gc();
344 static void set_ergonomics_flags();
345 static void set_shared_spaces_flags();
346 // limits the given memory size by the maximum amount of memory this process is
347 // currently allowed to allocate or reserve.
348 static julong limit_by_allocatable_memory(julong size);
349 // Setup heap size
350 static void set_heap_size();
351 // Based on automatic selection criteria, should the
352 // low pause collector be used.
353 static bool should_auto_select_low_pause_collector();
354
355 // Bytecode rewriting
356 static void set_bytecode_flags();
357
358 // Invocation API hooks
359 static abort_hook_t _abort_hook;
360 static exit_hook_t _exit_hook;
361 static vfprintf_hook_t _vfprintf_hook;
362
363 // System properties
364 static bool add_property(const char* prop);
365
366 // Aggressive optimization flags.
367 static jint set_aggressive_opts_flags();
368
369 static jint set_aggressive_heap_flags();
370
371 // Argument parsing
372 static void do_pd_flag_adjustments();
373 static bool parse_argument(const char* arg, Flag::Flags origin);
374 static bool process_argument(const char* arg, jboolean ignore_unrecognized, Flag::Flags origin);
375 static void process_java_launcher_argument(const char*, void*);
376 static void process_java_compiler_argument(const char* arg);
377 static jint parse_options_environment_variable(const char* name, ScopedVMInitArgs* vm_args);
378 static jint parse_java_tool_options_environment_variable(ScopedVMInitArgs* vm_args);
379 static jint parse_java_options_environment_variable(ScopedVMInitArgs* vm_args);
380 static jint parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args);
381 static jint parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args);
382 static jint insert_vm_options_file(const JavaVMInitArgs* args,
383 char** vm_options_file,
384 const int vm_options_file_pos,
385 ScopedVMInitArgs* vm_options_file_args,
386 ScopedVMInitArgs* args_out);
387 static jint match_special_option_and_act(const JavaVMInitArgs* args,
388 char** vm_options_file,
389 ScopedVMInitArgs* args_out);
390
391 static jint parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
392 const JavaVMInitArgs *java_options_args,
393 const JavaVMInitArgs *cmd_line_args);
394 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, SysClassPath* scp_p, bool* scp_assembly_required_p, Flag::Flags origin);
395 static jint finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required);
396 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type);
397
398 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) {
399 return is_bad_option(option, ignore, NULL);
400 }
401
402 static void describe_range_error(ArgsRange errcode);
403 static ArgsRange check_memory_size(julong size, julong min_size);
404 static ArgsRange parse_memory_size(const char* s, julong* long_arg,
405 julong min_size);
406 // Parse a string for a unsigned integer. Returns true if value
407 // is an unsigned integer greater than or equal to the minimum
408 // parameter passed and returns the value in uintx_arg. Returns
409 // false otherwise, with uintx_arg undefined.
410 static bool parse_uintx(const char* value, uintx* uintx_arg,
411 uintx min_size);
412
413 // methods to build strings from individual args
414 static void build_jvm_args(const char* arg);
415 static void build_jvm_flags(const char* arg);
416 static void add_string(char*** bldarray, int* count, const char* arg);
417 static const char* build_resource_string(char** args, int count);
418
419 static bool methodExists(
420 char* className, char* methodName,
421 int classesNum, char** classes, bool* allMethods,
422 int methodsNum, char** methods, bool* allClasses
423 );
424
425 static void parseOnlyLine(
426 const char* line,
427 short* classesNum, short* classesMax, char*** classes, bool** allMethods,
428 short* methodsNum, short* methodsMax, char*** methods, bool** allClasses
429 );
430
431 // Returns true if the flag is obsolete (and not yet expired).
432 // In this case the 'version' buffer is filled in with
433 // the version number when the flag became obsolete.
434 static bool is_obsolete_flag(const char* flag_name, JDK_Version* version);
435
436 // Returns 1 if the flag is deprecated (and not yet obsolete or expired).
437 // In this case the 'version' buffer is filled in with the version number when
438 // the flag became deprecated.
439 // Returns -1 if the flag is expired or obsolete.
440 // Returns 0 otherwise.
441 static int is_deprecated_flag(const char* flag_name, JDK_Version* version);
442
443 // Return the real name for the flag passed on the command line (either an alias name or "flag_name").
444 static const char* real_flag_name(const char *flag_name);
445
446 // Return the "real" name for option arg if arg is an alias, and print a warning if arg is deprecated.
447 // Return NULL if the arg has expired.
448 static const char* handle_aliases_and_deprecation(const char* arg, bool warn);
449
450 static short CompileOnlyClassesNum;
451 static short CompileOnlyClassesMax;
452 static char** CompileOnlyClasses;
453 static bool* CompileOnlyAllMethods;
454
455 static short CompileOnlyMethodsNum;
456 static short CompileOnlyMethodsMax;
457 static char** CompileOnlyMethods;
458 static bool* CompileOnlyAllClasses;
459
460 static short InterpretOnlyClassesNum;
461 static short InterpretOnlyClassesMax;
462 static char** InterpretOnlyClasses;
463 static bool* InterpretOnlyAllMethods;
464
465 static bool CheckCompileOnly;
466
467 static char* SharedArchivePath;
468
469 public:
470 // Scale compile thresholds
471 // Returns threshold scaled with CompileThresholdScaling
472 static intx scaled_compile_threshold(intx threshold, double scale);
473 static intx scaled_compile_threshold(intx threshold) {
474 return scaled_compile_threshold(threshold, CompileThresholdScaling);
475 }
476 // Returns freq_log scaled with CompileThresholdScaling
477 static intx scaled_freq_log(intx freq_log, double scale);
478 static intx scaled_freq_log(intx freq_log) {
479 return scaled_freq_log(freq_log, CompileThresholdScaling);
480 }
481
482 // Parses the arguments, first phase
483 static jint parse(const JavaVMInitArgs* args);
484 // Apply ergonomics
485 static jint apply_ergo();
486 // Adjusts the arguments after the OS have adjusted the arguments
487 static jint adjust_after_os();
488
489 static void set_gc_specific_flags();
490 static inline bool gc_selected(); // whether a gc has been selected
491 static void select_gc_ergonomically();
492
493 // Check for consistency in the selection of the garbage collector.
494 static bool check_gc_consistency(); // Check user-selected gc
495 // Check consistency or otherwise of VM argument settings
496 static bool check_vm_args_consistency();
497 // Used by os_solaris
498 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized);
499
500 static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; }
501 // Return the maximum size a heap with compressed oops can take
502 static size_t max_heap_for_compressed_oops();
503
504 // return a char* array containing all options
505 static char** jvm_flags_array() { return _jvm_flags_array; }
506 static char** jvm_args_array() { return _jvm_args_array; }
507 static int num_jvm_flags() { return _num_jvm_flags; }
508 static int num_jvm_args() { return _num_jvm_args; }
509 // return the arguments passed to the Java application
510 static const char* java_command() { return _java_command; }
511
512 // print jvm_flags, jvm_args and java_command
513 static void print_on(outputStream* st);
514 static void print_summary_on(outputStream* st);
515
516 // convenient methods to get and set jvm_flags_file
517 static const char* get_jvm_flags_file() { return _jvm_flags_file; }
518 static void set_jvm_flags_file(const char *value) {
519 if (_jvm_flags_file != NULL) {
520 os::free(_jvm_flags_file);
521 }
522 _jvm_flags_file = os::strdup_check_oom(value);
523 }
524 // convenient methods to obtain / print jvm_flags and jvm_args
525 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); }
526 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); }
527 static void print_jvm_flags_on(outputStream* st);
528 static void print_jvm_args_on(outputStream* st);
529
530 // -Dkey=value flags
531 static SystemProperty* system_properties() { return _system_properties; }
532 static const char* get_property(const char* key);
533
534 // -Djava.vendor.url.bug
535 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; }
536
537 // -Dsun.java.launcher
538 static const char* sun_java_launcher() { return _sun_java_launcher; }
539 // Was VM created by a Java launcher?
540 static bool created_by_java_launcher();
541 // -Dsun.java.launcher.is_altjvm
542 static bool sun_java_launcher_is_altjvm();
543 // -Dsun.java.launcher.pid
544 static int sun_java_launcher_pid() { return _sun_java_launcher_pid; }
545
546 // -Xloggc:<file>, if not specified will be NULL
547 static const char* gc_log_filename() { return _gc_log_filename; }
548
549 // -Xprof
550 static bool has_profile() { return _has_profile; }
551
552 // -Xms
553 static size_t min_heap_size() { return _min_heap_size; }
554 static void set_min_heap_size(size_t v) { _min_heap_size = v; }
555
556 // -Xrun
557 static AgentLibrary* libraries() { return _libraryList.first(); }
558 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); }
559 static void convert_library_to_agent(AgentLibrary* lib)
560 { _libraryList.remove(lib);
561 _agentList.add(lib); }
562
563 // -agentlib -agentpath
564 static AgentLibrary* agents() { return _agentList.first(); }
565 static bool init_agents_at_startup() { return !_agentList.is_empty(); }
566
567 // abort, exit, vfprintf hooks
568 static abort_hook_t abort_hook() { return _abort_hook; }
569 static exit_hook_t exit_hook() { return _exit_hook; }
570 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; }
571
572 static bool GetCheckCompileOnly () { return CheckCompileOnly; }
573
574 static const char* GetSharedArchivePath() { return SharedArchivePath; }
575
576 static bool CompileMethod(char* className, char* methodName) {
577 return
578 methodExists(
579 className, methodName,
580 CompileOnlyClassesNum, CompileOnlyClasses, CompileOnlyAllMethods,
581 CompileOnlyMethodsNum, CompileOnlyMethods, CompileOnlyAllClasses
582 );
583 }
584
585 // Java launcher properties
586 static void process_sun_java_launcher_properties(JavaVMInitArgs* args);
587
588 // System properties
589 static void init_system_properties();
590
591 // Update/Initialize System properties after JDK version number is known
592 static void init_version_specific_system_properties();
593
594 // Property List manipulation
595 static void PropertyList_add(SystemProperty *element);
596 static void PropertyList_add(SystemProperty** plist, SystemProperty *element);
597 static void PropertyList_add(SystemProperty** plist, const char* k, const char* v);
598 static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v) {
599 PropertyList_unique_add(plist, k, v, false);
600 }
601 static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, jboolean append);
602 static const char* PropertyList_get_value(SystemProperty* plist, const char* key);
603 static int PropertyList_count(SystemProperty* pl);
604 static const char* PropertyList_get_key_at(SystemProperty* pl,int index);
605 static char* PropertyList_get_value_at(SystemProperty* pl,int index);
606
607 // Miscellaneous System property value getter and setters.
608 static void set_dll_dir(const char *value) { _sun_boot_library_path->set_value(value); }
609 static void set_java_home(const char *value) { _java_home->set_value(value); }
610 static void set_library_path(const char *value) { _java_library_path->set_value(value); }
611 static void set_ext_dirs(char *value) { _ext_dirs = os::strdup_check_oom(value); }
612 static void set_sysclasspath(const char *value) { _sun_boot_class_path->set_value(value); }
613 static void append_sysclasspath(const char *value) { _sun_boot_class_path->append_value(value); }
614
615 static char* get_java_home() { return _java_home->value(); }
616 static char* get_dll_dir() { return _sun_boot_library_path->value(); }
617 static char* get_sysclasspath() { return _sun_boot_class_path->value(); }
618 static char* get_ext_dirs() { return _ext_dirs; }
619 static char* get_appclasspath() { return _java_class_path->value(); }
620 static void fix_appclasspath();
621
622
623 // Operation modi
624 static Mode mode() { return _mode; }
625 static bool is_interpreter_only() { return mode() == _int; }
626
627
628 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid.
629 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen);
630 };
631
632 bool Arguments::gc_selected() {
633 return UseConcMarkSweepGC || UseG1GC || UseParallelGC || UseParallelOldGC || UseSerialGC;
634 }
635
636 // Disable options not supported in this release, with a warning if they
637 // were explicitly requested on the command-line
638 #define UNSUPPORTED_OPTION(opt, description) \
639 do { \
640 if (opt) { \
641 if (FLAG_IS_CMDLINE(opt)) { \
642 warning(description " is disabled in this release."); \
643 } \
644 FLAG_SET_DEFAULT(opt, false); \
645 } \
646 } while(0)
647
648 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP