1 /*
2 * Copyright (c) 1997, 2016, 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 "logging/logLevel.hpp"
29 #include "logging/logTag.hpp"
30 #include "runtime/java.hpp"
31 #include "runtime/os.hpp"
32 #include "runtime/perfData.hpp"
33 #include "utilities/debug.hpp"
34 #include "utilities/top.hpp"
35
36 // Arguments parses the command line and recognizes options
37
38 // Invocation API hook typedefs (these should really be defined in jni.hpp)
39 extern "C" {
40 typedef void (JNICALL *abort_hook_t)(void);
41 typedef void (JNICALL *exit_hook_t)(jint code);
42 typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args) ATTRIBUTE_PRINTF(2, 0);
43 }
44
45 // Forward declarations
46
47 class SysClassPath;
48
49 // Element describing System and User (-Dkey=value flags) defined property.
50
51 class SystemProperty: public CHeapObj<mtInternal> {
52 private:
53 char* _key;
54 char* _value;
55 SystemProperty* _next;
56 bool _writeable;
57 bool writeable() { return _writeable; }
58
59 public:
60 // Accessors
61 const char* key() const { return _key; }
62 char* value() const { return _value; }
63 SystemProperty* next() const { return _next; }
64 void set_next(SystemProperty* next) { _next = next; }
65 bool set_value(const char *value) {
66 if (writeable()) {
67 if (_value != NULL) {
68 FreeHeap(_value);
69 }
70 _value = AllocateHeap(strlen(value)+1, mtInternal);
71 if (_value != NULL) {
72 strcpy(_value, value);
73 }
74 return true;
75 }
76 return false;
77 }
78
79 void append_value(const char *value) {
80 char *sp;
81 size_t len = 0;
82 if (value != NULL) {
83 len = strlen(value);
84 if (_value != NULL) {
85 len += strlen(_value);
86 }
87 sp = AllocateHeap(len+2, mtInternal);
88 if (sp != NULL) {
89 if (_value != NULL) {
90 strcpy(sp, _value);
91 strcat(sp, os::path_separator());
92 strcat(sp, value);
93 FreeHeap(_value);
94 } else {
95 strcpy(sp, value);
96 }
97 _value = sp;
98 }
99 }
100 }
101
102 // Constructor
103 SystemProperty(const char* key, const char* value, bool writeable) {
104 if (key == NULL) {
105 _key = NULL;
106 } else {
107 _key = AllocateHeap(strlen(key)+1, mtInternal);
108 strcpy(_key, key);
109 }
110 if (value == NULL) {
111 _value = NULL;
112 } else {
113 _value = AllocateHeap(strlen(value)+1, mtInternal);
114 strcpy(_value, value);
115 }
116 _next = NULL;
117 _writeable = writeable;
118 }
119 };
120
121
122 // For use by -agentlib, -agentpath and -Xrun
123 class AgentLibrary : public CHeapObj<mtInternal> {
124 friend class AgentLibraryList;
125 public:
126 // Is this library valid or not. Don't rely on os_lib == NULL as statically
127 // linked lib could have handle of RTLD_DEFAULT which == 0 on some platforms
128 enum AgentState {
129 agent_invalid = 0,
130 agent_valid = 1
131 };
132
133 private:
134 char* _name;
135 char* _options;
136 void* _os_lib;
137 bool _is_absolute_path;
138 bool _is_static_lib;
139 AgentState _state;
140 AgentLibrary* _next;
141
142 public:
143 // Accessors
144 const char* name() const { return _name; }
145 char* options() const { return _options; }
146 bool is_absolute_path() const { return _is_absolute_path; }
147 void* os_lib() const { return _os_lib; }
148 void set_os_lib(void* os_lib) { _os_lib = os_lib; }
149 AgentLibrary* next() const { return _next; }
150 bool is_static_lib() const { return _is_static_lib; }
151 void set_static_lib(bool is_static_lib) { _is_static_lib = is_static_lib; }
152 bool valid() { return (_state == agent_valid); }
153 void set_valid() { _state = agent_valid; }
154 void set_invalid() { _state = agent_invalid; }
155
156 // Constructor
157 AgentLibrary(const char* name, const char* options, bool is_absolute_path, void* os_lib) {
158 _name = AllocateHeap(strlen(name)+1, mtInternal);
159 strcpy(_name, name);
160 if (options == NULL) {
161 _options = NULL;
162 } else {
163 _options = AllocateHeap(strlen(options)+1, mtInternal);
164 strcpy(_options, options);
165 }
166 _is_absolute_path = is_absolute_path;
167 _os_lib = os_lib;
168 _next = NULL;
169 _state = agent_invalid;
170 _is_static_lib = false;
171 }
172 };
173
174 // maintain an order of entry list of AgentLibrary
175 class AgentLibraryList VALUE_OBJ_CLASS_SPEC {
176 private:
177 AgentLibrary* _first;
178 AgentLibrary* _last;
179 public:
180 bool is_empty() const { return _first == NULL; }
181 AgentLibrary* first() const { return _first; }
182
183 // add to the end of the list
184 void add(AgentLibrary* lib) {
185 if (is_empty()) {
186 _first = _last = lib;
187 } else {
188 _last->_next = lib;
189 _last = lib;
190 }
191 lib->_next = NULL;
192 }
193
194 // search for and remove a library known to be in the list
195 void remove(AgentLibrary* lib) {
196 AgentLibrary* curr;
197 AgentLibrary* prev = NULL;
198 for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) {
199 if (curr == lib) {
200 break;
201 }
202 }
203 assert(curr != NULL, "always should be found");
204
205 if (curr != NULL) {
206 // it was found, by-pass this library
207 if (prev == NULL) {
208 _first = curr->_next;
209 } else {
210 prev->_next = curr->_next;
211 }
212 if (curr == _last) {
213 _last = prev;
214 }
215 curr->_next = NULL;
216 }
217 }
218
219 AgentLibraryList() {
220 _first = NULL;
221 _last = NULL;
222 }
223 };
224
225 // Helper class for controlling the lifetime of JavaVMInitArgs objects.
226 class ScopedVMInitArgs;
227
228 // Most logging functions require 5 tags. Some of them may be _NO_TAG.
229 typedef struct {
230 const char* alias_name;
231 LogLevelType level;
232 bool exactMatch;
233 LogTagType tag;
234 } AliasedLoggingFlag;
235
236 class Arguments : AllStatic {
237 friend class VMStructs;
238 friend class JvmtiExport;
239 friend class CodeCacheExtensions;
240 public:
241 // Operation modi
242 enum Mode {
243 _int, // corresponds to -Xint
244 _mixed, // corresponds to -Xmixed
245 _comp // corresponds to -Xcomp
246 };
247
248 enum ArgsRange {
249 arg_unreadable = -3,
250 arg_too_small = -2,
251 arg_too_big = -1,
252 arg_in_range = 0
253 };
254
255 private:
256
257 // a pointer to the flags file name if it is specified
258 static char* _jvm_flags_file;
259 // an array containing all flags specified in the .hotspotrc file
260 static char** _jvm_flags_array;
261 static int _num_jvm_flags;
262 // an array containing all jvm arguments specified in the command line
263 static char** _jvm_args_array;
264 static int _num_jvm_args;
265 // string containing all java command (class/jarfile name and app args)
266 static char* _java_command;
267
268 // Property list
269 static SystemProperty* _system_properties;
270
271 // Quick accessor to System properties in the list:
272 static SystemProperty *_sun_boot_library_path;
273 static SystemProperty *_java_library_path;
274 static SystemProperty *_java_home;
275 static SystemProperty *_java_class_path;
276 static SystemProperty *_sun_boot_class_path;
277
278 // temporary: to emit warning if the default ext dirs are not empty.
279 // remove this variable when the warning is no longer needed.
280 static char* _ext_dirs;
281
282 // java.vendor.url.bug, bug reporting URL for fatal errors.
283 static const char* _java_vendor_url_bug;
284
285 // sun.java.launcher, private property to provide information about
286 // java launcher
287 static const char* _sun_java_launcher;
288
289 // sun.java.launcher.pid, private property
290 static int _sun_java_launcher_pid;
291
292 // was this VM created via the -XXaltjvm=<path> option
293 static bool _sun_java_launcher_is_altjvm;
294
295 // Option flags
296 static bool _has_profile;
297 static const char* _gc_log_filename;
298 // Value of the conservative maximum heap alignment needed
299 static size_t _conservative_max_heap_alignment;
300
301 static uintx _min_heap_size;
302
303 // -Xrun arguments
304 static AgentLibraryList _libraryList;
305 static void add_init_library(const char* name, char* options)
306 { _libraryList.add(new AgentLibrary(name, options, false, NULL)); }
307
308 // -agentlib and -agentpath arguments
309 static AgentLibraryList _agentList;
310 static void add_init_agent(const char* name, char* options, bool absolute_path)
311 { _agentList.add(new AgentLibrary(name, options, absolute_path, NULL)); }
312
313 // Late-binding agents not started via arguments
314 static void add_loaded_agent(AgentLibrary *agentLib)
315 { _agentList.add(agentLib); }
316 static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib)
317 { _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib)); }
318
319 // Operation modi
320 static Mode _mode;
321 static void set_mode_flags(Mode mode);
322 static bool _java_compiler;
323 static void set_java_compiler(bool arg) { _java_compiler = arg; }
324 static bool java_compiler() { return _java_compiler; }
325
326 // -Xdebug flag
327 static bool _xdebug_mode;
328 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; }
329 static bool xdebug_mode() { return _xdebug_mode; }
330
331 // Used to save default settings
332 static bool _AlwaysCompileLoopMethods;
333 static bool _UseOnStackReplacement;
334 static bool _BackgroundCompilation;
335 static bool _ClipInlining;
336 static bool _CIDynamicCompilePriority;
337 static intx _Tier3InvokeNotifyFreqLog;
338 static intx _Tier4InvocationThreshold;
339
340 // Tiered
341 static void set_tiered_flags();
342 // CMS/ParNew garbage collectors
343 static void set_parnew_gc_flags();
344 static void set_cms_and_parnew_gc_flags();
345 // UseParallel[Old]GC
346 static void set_parallel_gc_flags();
347 // Garbage-First (UseG1GC)
348 static void set_g1_gc_flags();
349 // GC ergonomics
350 static void set_conservative_max_heap_alignment();
351 static void set_use_compressed_oops();
352 static void set_use_compressed_klass_ptrs();
353 static void select_gc();
354 static void set_ergonomics_flags();
355 static void set_shared_spaces_flags();
356 // limits the given memory size by the maximum amount of memory this process is
357 // currently allowed to allocate or reserve.
358 static julong limit_by_allocatable_memory(julong size);
359 // Setup heap size
360 static void set_heap_size();
361 // Based on automatic selection criteria, should the
362 // low pause collector be used.
363 static bool should_auto_select_low_pause_collector();
364
365 // Bytecode rewriting
366 static void set_bytecode_flags();
367
368 // Invocation API hooks
369 static abort_hook_t _abort_hook;
370 static exit_hook_t _exit_hook;
371 static vfprintf_hook_t _vfprintf_hook;
372
373 // System properties
374 static bool add_property(const char* prop);
375
376 // Aggressive optimization flags.
377 static jint set_aggressive_opts_flags();
378
379 static jint set_aggressive_heap_flags();
380
381 // Argument parsing
382 static void do_pd_flag_adjustments();
383 static bool parse_argument(const char* arg, Flag::Flags origin);
384 static bool process_argument(const char* arg, jboolean ignore_unrecognized, Flag::Flags origin);
385 static void process_java_launcher_argument(const char*, void*);
386 static void process_java_compiler_argument(const char* arg);
387 static jint parse_options_environment_variable(const char* name, ScopedVMInitArgs* vm_args);
388 static jint parse_java_tool_options_environment_variable(ScopedVMInitArgs* vm_args);
389 static jint parse_java_options_environment_variable(ScopedVMInitArgs* vm_args);
390 static jint parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args);
391 static jint parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args);
392 static jint insert_vm_options_file(const JavaVMInitArgs* args,
393 const char* vm_options_file,
394 const int vm_options_file_pos,
395 ScopedVMInitArgs* vm_options_file_args,
396 ScopedVMInitArgs* args_out);
397 static bool args_contains_vm_options_file_arg(const JavaVMInitArgs* args);
398 static jint expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
399 ScopedVMInitArgs* mod_args,
400 JavaVMInitArgs** args_out);
401 static jint match_special_option_and_act(const JavaVMInitArgs* args,
402 ScopedVMInitArgs* args_out);
403
404 static bool handle_deprecated_print_gc_flags();
405
406 static jint parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
407 const JavaVMInitArgs *java_options_args,
408 const JavaVMInitArgs *cmd_line_args);
409 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, SysClassPath* scp_p, bool* scp_assembly_required_p, Flag::Flags origin);
410 static jint finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required);
411 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type);
412
413 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) {
414 return is_bad_option(option, ignore, NULL);
415 }
416
417 static void describe_range_error(ArgsRange errcode);
418 static ArgsRange check_memory_size(julong size, julong min_size);
419 static ArgsRange parse_memory_size(const char* s, julong* long_arg,
420 julong min_size);
421 // Parse a string for a unsigned integer. Returns true if value
422 // is an unsigned integer greater than or equal to the minimum
423 // parameter passed and returns the value in uintx_arg. Returns
424 // false otherwise, with uintx_arg undefined.
425 static bool parse_uintx(const char* value, uintx* uintx_arg,
426 uintx min_size);
427
428 // methods to build strings from individual args
429 static void build_jvm_args(const char* arg);
430 static void build_jvm_flags(const char* arg);
431 static void add_string(char*** bldarray, int* count, const char* arg);
432 static const char* build_resource_string(char** args, int count);
433
434 static bool methodExists(
435 char* className, char* methodName,
436 int classesNum, char** classes, bool* allMethods,
437 int methodsNum, char** methods, bool* allClasses
438 );
439
440 static void parseOnlyLine(
441 const char* line,
442 short* classesNum, short* classesMax, char*** classes, bool** allMethods,
443 short* methodsNum, short* methodsMax, char*** methods, bool** allClasses
444 );
445
446 // Returns true if the flag is obsolete (and not yet expired).
447 // In this case the 'version' buffer is filled in with
448 // the version number when the flag became obsolete.
449 static bool is_obsolete_flag(const char* flag_name, JDK_Version* version);
450
451 // Returns 1 if the flag is deprecated (and not yet obsolete or expired).
452 // In this case the 'version' buffer is filled in with the version number when
453 // the flag became deprecated.
454 // Returns -1 if the flag is expired or obsolete.
455 // Returns 0 otherwise.
456 static int is_deprecated_flag(const char* flag_name, JDK_Version* version);
457
458 // Return the real name for the flag passed on the command line (either an alias name or "flag_name").
459 static const char* real_flag_name(const char *flag_name);
460
461 // Return the "real" name for option arg if arg is an alias, and print a warning if arg is deprecated.
462 // Return NULL if the arg has expired.
463 static const char* handle_aliases_and_deprecation(const char* arg, bool warn);
464 static bool lookup_logging_aliases(const char* arg, char* buffer);
465 static AliasedLoggingFlag catch_logging_aliases(const char* name);
466 static short CompileOnlyClassesNum;
467 static short CompileOnlyClassesMax;
468 static char** CompileOnlyClasses;
469 static bool* CompileOnlyAllMethods;
470
471 static short CompileOnlyMethodsNum;
472 static short CompileOnlyMethodsMax;
473 static char** CompileOnlyMethods;
474 static bool* CompileOnlyAllClasses;
475
476 static short InterpretOnlyClassesNum;
477 static short InterpretOnlyClassesMax;
478 static char** InterpretOnlyClasses;
479 static bool* InterpretOnlyAllMethods;
480
481 static bool CheckCompileOnly;
482
483 static char* SharedArchivePath;
484
485 public:
486 // Scale compile thresholds
487 // Returns threshold scaled with CompileThresholdScaling
488 static intx scaled_compile_threshold(intx threshold, double scale);
489 static intx scaled_compile_threshold(intx threshold) {
490 return scaled_compile_threshold(threshold, CompileThresholdScaling);
491 }
492 // Returns freq_log scaled with CompileThresholdScaling
493 static intx scaled_freq_log(intx freq_log, double scale);
494 static intx scaled_freq_log(intx freq_log) {
495 return scaled_freq_log(freq_log, CompileThresholdScaling);
496 }
497
498 // Parses the arguments, first phase
499 static jint parse(const JavaVMInitArgs* args);
500 // Apply ergonomics
501 static jint apply_ergo();
502 // Adjusts the arguments after the OS have adjusted the arguments
503 static jint adjust_after_os();
504
505 static void set_gc_specific_flags();
506 static inline bool gc_selected(); // whether a gc has been selected
507 static void select_gc_ergonomically();
508
509 #if INCLUDE_JVMCI
510 // Check consistency of jvmci vm argument settings.
511 static bool check_jvmci_args_consistency();
512 #endif
513
514 // Check for consistency in the selection of the garbage collector.
515 static bool check_gc_consistency(); // Check user-selected gc
516 // Check consistency or otherwise of VM argument settings
517 static bool check_vm_args_consistency();
518 // Used by os_solaris
519 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized);
520
521 static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; }
522 // Return the maximum size a heap with compressed oops can take
523 static size_t max_heap_for_compressed_oops();
524
525 // return a char* array containing all options
526 static char** jvm_flags_array() { return _jvm_flags_array; }
527 static char** jvm_args_array() { return _jvm_args_array; }
528 static int num_jvm_flags() { return _num_jvm_flags; }
529 static int num_jvm_args() { return _num_jvm_args; }
530 // return the arguments passed to the Java application
531 static const char* java_command() { return _java_command; }
532
533 // print jvm_flags, jvm_args and java_command
534 static void print_on(outputStream* st);
535 static void print_summary_on(outputStream* st);
536
537 // convenient methods to get and set jvm_flags_file
538 static const char* get_jvm_flags_file() { return _jvm_flags_file; }
539 static void set_jvm_flags_file(const char *value) {
540 if (_jvm_flags_file != NULL) {
541 os::free(_jvm_flags_file);
542 }
543 _jvm_flags_file = os::strdup_check_oom(value);
544 }
545 // convenient methods to obtain / print jvm_flags and jvm_args
546 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); }
547 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); }
548 static void print_jvm_flags_on(outputStream* st);
549 static void print_jvm_args_on(outputStream* st);
550
551 // -Dkey=value flags
552 static SystemProperty* system_properties() { return _system_properties; }
553 static const char* get_property(const char* key);
554
555 // -Djava.vendor.url.bug
556 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; }
557
558 // -Dsun.java.launcher
559 static const char* sun_java_launcher() { return _sun_java_launcher; }
560 // Was VM created by a Java launcher?
561 static bool created_by_java_launcher();
562 // -Dsun.java.launcher.is_altjvm
563 static bool sun_java_launcher_is_altjvm();
564 // -Dsun.java.launcher.pid
565 static int sun_java_launcher_pid() { return _sun_java_launcher_pid; }
566
567 // -Xprof
568 static bool has_profile() { return _has_profile; }
569
570 // -Xms
571 static size_t min_heap_size() { return _min_heap_size; }
572 static void set_min_heap_size(size_t v) { _min_heap_size = v; }
573
574 // -Xrun
575 static AgentLibrary* libraries() { return _libraryList.first(); }
576 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); }
577 static void convert_library_to_agent(AgentLibrary* lib)
578 { _libraryList.remove(lib);
579 _agentList.add(lib); }
580
581 // -agentlib -agentpath
582 static AgentLibrary* agents() { return _agentList.first(); }
583 static bool init_agents_at_startup() { return !_agentList.is_empty(); }
584
585 // abort, exit, vfprintf hooks
586 static abort_hook_t abort_hook() { return _abort_hook; }
587 static exit_hook_t exit_hook() { return _exit_hook; }
588 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; }
589
590 static bool GetCheckCompileOnly () { return CheckCompileOnly; }
591
592 static const char* GetSharedArchivePath() { return SharedArchivePath; }
593
594 static bool CompileMethod(char* className, char* methodName) {
595 return
596 methodExists(
597 className, methodName,
598 CompileOnlyClassesNum, CompileOnlyClasses, CompileOnlyAllMethods,
599 CompileOnlyMethodsNum, CompileOnlyMethods, CompileOnlyAllClasses
600 );
601 }
602
603 // Java launcher properties
604 static void process_sun_java_launcher_properties(JavaVMInitArgs* args);
605
606 // System properties
607 static void init_system_properties();
608
609 // Update/Initialize System properties after JDK version number is known
610 static void init_version_specific_system_properties();
611
612 // Property List manipulation
613 static void PropertyList_add(SystemProperty *element);
614 static void PropertyList_add(SystemProperty** plist, SystemProperty *element);
615 static void PropertyList_add(SystemProperty** plist, const char* k, const char* v);
616 static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v) {
617 PropertyList_unique_add(plist, k, v, false);
618 }
619 static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, jboolean append);
620 static const char* PropertyList_get_value(SystemProperty* plist, const char* key);
621 static int PropertyList_count(SystemProperty* pl);
622 static const char* PropertyList_get_key_at(SystemProperty* pl,int index);
623 static char* PropertyList_get_value_at(SystemProperty* pl,int index);
624
625 // Miscellaneous System property value getter and setters.
626 static void set_dll_dir(const char *value) { _sun_boot_library_path->set_value(value); }
627 static void set_java_home(const char *value) { _java_home->set_value(value); }
628 static void set_library_path(const char *value) { _java_library_path->set_value(value); }
629 static void set_ext_dirs(char *value) { _ext_dirs = os::strdup_check_oom(value); }
630 static void set_sysclasspath(const char *value) { _sun_boot_class_path->set_value(value); }
631 static void append_sysclasspath(const char *value) { _sun_boot_class_path->append_value(value); }
632
633 static char* get_java_home() { return _java_home->value(); }
634 static char* get_dll_dir() { return _sun_boot_library_path->value(); }
635 static char* get_sysclasspath() { return _sun_boot_class_path->value(); }
636 static char* get_ext_dirs() { return _ext_dirs; }
637 static char* get_appclasspath() { return _java_class_path->value(); }
638 static void fix_appclasspath();
639
640
641 // Operation modi
642 static Mode mode() { return _mode; }
643 static bool is_interpreter_only() { return mode() == _int; }
644
645
646 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid.
647 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen);
648 };
649
650 bool Arguments::gc_selected() {
651 return UseConcMarkSweepGC || UseG1GC || UseParallelGC || UseParallelOldGC || UseSerialGC;
652 }
653
654 // Disable options not supported in this release, with a warning if they
655 // were explicitly requested on the command-line
656 #define UNSUPPORTED_OPTION(opt, description) \
657 do { \
658 if (opt) { \
659 if (FLAG_IS_CMDLINE(opt)) { \
660 warning(description " is disabled in this release."); \
661 } \
662 FLAG_SET_DEFAULT(opt, false); \
663 } \
664 } while(0)
665
666 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP