1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_RUNTIME_ARGUMENTS_HPP
26 #define SHARE_VM_RUNTIME_ARGUMENTS_HPP
27
28 #include "logging/logLevel.hpp"
29 #include "logging/logTag.hpp"
30 #include "memory/allocation.hpp"
31 #include "runtime/java.hpp"
32 #include "runtime/os.hpp"
33 #include "runtime/perfData.hpp"
34 #include "utilities/debug.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 // Obsolete or deprecated -XX flag.
46 struct SpecialFlag {
47 const char* name;
48 JDK_Version deprecated_in; // When the deprecation warning started (or "undefined").
49 JDK_Version obsolete_in; // When the obsolete warning started (or "undefined").
50 JDK_Version expired_in; // When the option expires (or "undefined").
51 };
52
53 // PathString is used as:
54 // - the underlying value for a SystemProperty
55 // - the path portion of an --patch-module module/path pair
56 // - the string that represents the system boot class path, Arguments::_system_boot_class_path.
57 class PathString : public CHeapObj<mtArguments> {
58 protected:
59 char* _value;
60 public:
61 char* value() const { return _value; }
62
63 bool set_value(const char *value);
64 void append_value(const char *value);
65
66 PathString(const char* value);
67 ~PathString();
68 };
69
70 // ModulePatchPath records the module/path pair as specified to --patch-module.
71 class ModulePatchPath : public CHeapObj<mtInternal> {
72 private:
73 char* _module_name;
74 PathString* _path;
75 public:
76 ModulePatchPath(const char* module_name, const char* path);
77 ~ModulePatchPath();
78
79 inline void set_path(const char* path) { _path->set_value(path); }
80 inline const char* module_name() const { return _module_name; }
81 inline char* path_string() const { return _path->value(); }
82 };
83
84 // Element describing System and User (-Dkey=value flags) defined property.
85 //
86 // An internal SystemProperty is one that has been removed in
87 // jdk.internal.VM.saveAndRemoveProperties, like jdk.boot.class.path.append.
88 //
89 class SystemProperty : public PathString {
90 private:
91 char* _key;
92 SystemProperty* _next;
93 bool _internal;
94 bool _writeable;
95 bool writeable() { return _writeable; }
96
97 public:
98 // Accessors
99 char* value() const { return PathString::value(); }
100 const char* key() const { return _key; }
101 bool internal() const { return _internal; }
102 SystemProperty* next() const { return _next; }
103 void set_next(SystemProperty* next) { _next = next; }
104
105 bool is_readable() const {
106 return !_internal || strcmp(_key, "jdk.boot.class.path.append") == 0;
107 }
108
109 // A system property should only have its value set
110 // via an external interface if it is a writeable property.
111 // The internal, non-writeable property jdk.boot.class.path.append
112 // is the only exception to this rule. It can be set externally
113 // via -Xbootclasspath/a or JVMTI OnLoad phase call to AddToBootstrapClassLoaderSearch.
114 // In those cases for jdk.boot.class.path.append, the base class
115 // set_value and append_value methods are called directly.
116 bool set_writeable_value(const char *value) {
117 if (writeable()) {
118 return set_value(value);
119 }
120 return false;
121 }
122
123 // Constructor
124 SystemProperty(const char* key, const char* value, bool writeable, bool internal = false);
125 };
126
127
128 // For use by -agentlib, -agentpath and -Xrun
129 class AgentLibrary : public CHeapObj<mtArguments> {
130 friend class AgentLibraryList;
131 public:
132 // Is this library valid or not. Don't rely on os_lib == NULL as statically
133 // linked lib could have handle of RTLD_DEFAULT which == 0 on some platforms
134 enum AgentState {
135 agent_invalid = 0,
136 agent_valid = 1
137 };
138
139 private:
140 char* _name;
141 char* _options;
142 void* _os_lib;
143 bool _is_absolute_path;
144 bool _is_static_lib;
145 bool _is_instrument_lib;
146 AgentState _state;
147 AgentLibrary* _next;
148
149 public:
150 // Accessors
151 const char* name() const { return _name; }
152 char* options() const { return _options; }
153 bool is_absolute_path() const { return _is_absolute_path; }
154 void* os_lib() const { return _os_lib; }
155 void set_os_lib(void* os_lib) { _os_lib = os_lib; }
156 AgentLibrary* next() const { return _next; }
157 bool is_static_lib() const { return _is_static_lib; }
158 bool is_instrument_lib() const { return _is_instrument_lib; }
159 void set_static_lib(bool is_static_lib) { _is_static_lib = is_static_lib; }
160 bool valid() { return (_state == agent_valid); }
161 void set_valid() { _state = agent_valid; }
162 void set_invalid() { _state = agent_invalid; }
163
164 // Constructor
165 AgentLibrary(const char* name, const char* options, bool is_absolute_path,
166 void* os_lib, bool instrument_lib=false);
167 };
168
169 // maintain an order of entry list of AgentLibrary
170 class AgentLibraryList {
171 private:
172 AgentLibrary* _first;
173 AgentLibrary* _last;
174 public:
175 bool is_empty() const { return _first == NULL; }
176 AgentLibrary* first() const { return _first; }
177
178 // add to the end of the list
179 void add(AgentLibrary* lib) {
180 if (is_empty()) {
181 _first = _last = lib;
182 } else {
183 _last->_next = lib;
184 _last = lib;
185 }
186 lib->_next = NULL;
187 }
188
189 // search for and remove a library known to be in the list
190 void remove(AgentLibrary* lib) {
191 AgentLibrary* curr;
192 AgentLibrary* prev = NULL;
193 for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) {
194 if (curr == lib) {
195 break;
196 }
197 }
198 assert(curr != NULL, "always should be found");
199
200 if (curr != NULL) {
201 // it was found, by-pass this library
202 if (prev == NULL) {
203 _first = curr->_next;
204 } else {
205 prev->_next = curr->_next;
206 }
207 if (curr == _last) {
208 _last = prev;
209 }
210 curr->_next = NULL;
211 }
212 }
213
214 AgentLibraryList() {
215 _first = NULL;
216 _last = NULL;
217 }
218 };
219
220 // Helper class for controlling the lifetime of JavaVMInitArgs objects.
221 class ScopedVMInitArgs;
222
223 // Most logging functions require 5 tags. Some of them may be _NO_TAG.
224 typedef struct {
225 const char* alias_name;
226 LogLevelType level;
227 bool exactMatch;
228 LogTagType tag0;
229 LogTagType tag1;
230 LogTagType tag2;
231 LogTagType tag3;
232 LogTagType tag4;
233 LogTagType tag5;
234 } AliasedLoggingFlag;
235
236 class Arguments : AllStatic {
237 friend class VMStructs;
238 friend class JvmtiExport;
239 friend class CodeCacheExtensions;
240 friend class ArgumentsTest;
241 public:
242 // Operation modi
243 enum Mode {
244 _int, // corresponds to -Xint
245 _mixed, // corresponds to -Xmixed
246 _comp // corresponds to -Xcomp
247 };
248
249 enum ArgsRange {
250 arg_unreadable = -3,
251 arg_too_small = -2,
252 arg_too_big = -1,
253 arg_in_range = 0
254 };
255
256 enum PropertyAppendable {
257 AppendProperty,
258 AddProperty
259 };
260
261 enum PropertyWriteable {
262 WriteableProperty,
263 UnwriteableProperty
264 };
265
266 enum PropertyInternal {
267 InternalProperty,
268 ExternalProperty
269 };
270
271 private:
272
273 // a pointer to the flags file name if it is specified
274 static char* _jvm_flags_file;
275 // an array containing all flags specified in the .hotspotrc file
276 static char** _jvm_flags_array;
277 static int _num_jvm_flags;
278 // an array containing all jvm arguments specified in the command line
279 static char** _jvm_args_array;
280 static int _num_jvm_args;
281 // string containing all java command (class/jarfile name and app args)
282 static char* _java_command;
283
284 // Property list
285 static SystemProperty* _system_properties;
286
287 // Quick accessor to System properties in the list:
288 static SystemProperty *_sun_boot_library_path;
289 static SystemProperty *_java_library_path;
290 static SystemProperty *_java_home;
291 static SystemProperty *_java_class_path;
292 static SystemProperty *_jdk_boot_class_path_append;
293
294 // --patch-module=module=<file>(<pathsep><file>)*
295 // Each element contains the associated module name, path
296 // string pair as specified to --patch-module.
297 static GrowableArray<ModulePatchPath*>* _patch_mod_prefix;
298
299 // The constructed value of the system class path after
300 // argument processing and JVMTI OnLoad additions via
301 // calls to AddToBootstrapClassLoaderSearch. This is the
302 // final form before ClassLoader::setup_bootstrap_search().
303 // Note: since --patch-module is a module name/path pair, the
304 // system boot class path string no longer contains the "prefix"
305 // to the boot class path base piece as it did when
306 // -Xbootclasspath/p was supported.
307 static PathString *_system_boot_class_path;
308
309 // Set if a modular java runtime image is present vs. a build with exploded modules
310 static bool _has_jimage;
311
312 // temporary: to emit warning if the default ext dirs are not empty.
313 // remove this variable when the warning is no longer needed.
314 static char* _ext_dirs;
315
316 // java.vendor.url.bug, bug reporting URL for fatal errors.
317 static const char* _java_vendor_url_bug;
318
319 // sun.java.launcher, private property to provide information about
320 // java launcher
321 static const char* _sun_java_launcher;
322
323 // sun.java.launcher.pid, private property
324 static int _sun_java_launcher_pid;
325
326 // was this VM created via the -XXaltjvm=<path> option
327 static bool _sun_java_launcher_is_altjvm;
328
329 // Option flags
330 static const char* _gc_log_filename;
331 // Value of the conservative maximum heap alignment needed
332 static size_t _conservative_max_heap_alignment;
333
334 static uintx _min_heap_size;
335
336 // -Xrun arguments
337 static AgentLibraryList _libraryList;
338 static void add_init_library(const char* name, char* options);
339
340 // -agentlib and -agentpath arguments
341 static AgentLibraryList _agentList;
342 static void add_init_agent(const char* name, char* options, bool absolute_path);
343 static void add_instrument_agent(const char* name, char* options, bool absolute_path);
344
345 // Late-binding agents not started via arguments
346 static void add_loaded_agent(AgentLibrary *agentLib);
347 static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib);
348
349 // Operation modi
350 static Mode _mode;
351 static void set_mode_flags(Mode mode);
352 static bool _java_compiler;
353 static void set_java_compiler(bool arg) { _java_compiler = arg; }
354 static bool java_compiler() { return _java_compiler; }
355
356 // -Xdebug flag
357 static bool _xdebug_mode;
358 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; }
359 static bool xdebug_mode() { return _xdebug_mode; }
360
361 // Used to save default settings
362 static bool _AlwaysCompileLoopMethods;
363 static bool _UseOnStackReplacement;
364 static bool _BackgroundCompilation;
365 static bool _ClipInlining;
366 static bool _CIDynamicCompilePriority;
367 static intx _Tier3InvokeNotifyFreqLog;
368 static intx _Tier4InvocationThreshold;
369
370 // Compilation mode.
371 static bool compilation_mode_selected();
372 static void select_compilation_mode_ergonomically();
373
374 // Tiered
375 static void set_tiered_flags();
376
377 // GC ergonomics
378 static void set_conservative_max_heap_alignment();
379 static void set_use_compressed_oops();
380 static void set_use_compressed_klass_ptrs();
381 static jint set_ergonomics_flags();
382 static void set_shared_spaces_flags();
383 // limits the given memory size by the maximum amount of memory this process is
384 // currently allowed to allocate or reserve.
385 static julong limit_by_allocatable_memory(julong size);
386 // Setup heap size
387 static void set_heap_size();
388
389 // Bytecode rewriting
390 static void set_bytecode_flags();
391
392 // Invocation API hooks
393 static abort_hook_t _abort_hook;
394 static exit_hook_t _exit_hook;
395 static vfprintf_hook_t _vfprintf_hook;
396
397 // System properties
398 static bool add_property(const char* prop, PropertyWriteable writeable=WriteableProperty,
399 PropertyInternal internal=ExternalProperty);
400
401 static bool create_property(const char* prop_name, const char* prop_value, PropertyInternal internal);
402 static bool create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count);
403
404 static int process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase);
405
406 // Aggressive optimization flags.
407 static jint set_aggressive_opts_flags();
408
409 static jint set_aggressive_heap_flags();
410
411 // Argument parsing
412 static void do_pd_flag_adjustments();
413 static bool parse_argument(const char* arg, Flag::Flags origin);
414 static bool process_argument(const char* arg, jboolean ignore_unrecognized, Flag::Flags origin);
415 static void process_java_launcher_argument(const char*, void*);
416 static void process_java_compiler_argument(const char* arg);
417 static jint parse_options_environment_variable(const char* name, ScopedVMInitArgs* vm_args);
418 static jint parse_java_tool_options_environment_variable(ScopedVMInitArgs* vm_args);
419 static jint parse_java_options_environment_variable(ScopedVMInitArgs* vm_args);
420 static jint parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args);
421 static jint parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args);
422 static jint parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize);
423 static jint insert_vm_options_file(const JavaVMInitArgs* args,
424 const char* vm_options_file,
425 const int vm_options_file_pos,
426 ScopedVMInitArgs* vm_options_file_args,
427 ScopedVMInitArgs* args_out);
428 static bool args_contains_vm_options_file_arg(const JavaVMInitArgs* args);
429 static jint expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
430 ScopedVMInitArgs* mod_args,
431 JavaVMInitArgs** args_out);
432 static jint match_special_option_and_act(const JavaVMInitArgs* args,
433 ScopedVMInitArgs* args_out);
434
435 static bool handle_deprecated_print_gc_flags();
436
437 static void handle_extra_cms_flags(const char* msg);
438
439 static jint parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
440 const JavaVMInitArgs *java_options_args,
441 const JavaVMInitArgs *cmd_line_args);
442 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, Flag::Flags origin);
443 static jint finalize_vm_init_args(bool patch_mod_javabase);
444 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type);
445
446 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) {
447 return is_bad_option(option, ignore, NULL);
448 }
449
450 static void describe_range_error(ArgsRange errcode);
451 static ArgsRange check_memory_size(julong size, julong min_size, julong max_size);
452 static ArgsRange parse_memory_size(const char* s, julong* long_arg,
453 julong min_size, julong max_size = max_uintx);
454 // Parse a string for a unsigned integer. Returns true if value
455 // is an unsigned integer greater than or equal to the minimum
456 // parameter passed and returns the value in uintx_arg. Returns
457 // false otherwise, with uintx_arg undefined.
458 static bool parse_uintx(const char* value, uintx* uintx_arg,
459 uintx min_size);
460
461 // methods to build strings from individual args
462 static void build_jvm_args(const char* arg);
463 static void build_jvm_flags(const char* arg);
464 static void add_string(char*** bldarray, int* count, const char* arg);
465 static const char* build_resource_string(char** args, int count);
466
467 static bool methodExists(
468 char* className, char* methodName,
469 int classesNum, char** classes, bool* allMethods,
470 int methodsNum, char** methods, bool* allClasses
471 );
472
473 static void parseOnlyLine(
474 const char* line,
475 short* classesNum, short* classesMax, char*** classes, bool** allMethods,
476 short* methodsNum, short* methodsMax, char*** methods, bool** allClasses
477 );
478
479 // Returns true if the flag is obsolete (and not yet expired).
480 // In this case the 'version' buffer is filled in with
481 // the version number when the flag became obsolete.
482 static bool is_obsolete_flag(const char* flag_name, JDK_Version* version);
483
484 #ifndef PRODUCT
485 static const char* removed_develop_logging_flag_name(const char* name);
486 #endif // PRODUCT
487
488 // Returns 1 if the flag is deprecated (and not yet obsolete or expired).
489 // In this case the 'version' buffer is filled in with the version number when
490 // the flag became deprecated.
491 // Returns -1 if the flag is expired or obsolete.
492 // Returns 0 otherwise.
493 static int is_deprecated_flag(const char* flag_name, JDK_Version* version);
494
495 // Return the real name for the flag passed on the command line (either an alias name or "flag_name").
496 static const char* real_flag_name(const char *flag_name);
497
498 // Return the "real" name for option arg if arg is an alias, and print a warning if arg is deprecated.
499 // Return NULL if the arg has expired.
500 static const char* handle_aliases_and_deprecation(const char* arg, bool warn);
501 static bool lookup_logging_aliases(const char* arg, char* buffer);
502 static AliasedLoggingFlag catch_logging_aliases(const char* name, bool on);
503 static short CompileOnlyClassesNum;
504 static short CompileOnlyClassesMax;
505 static char** CompileOnlyClasses;
506 static bool* CompileOnlyAllMethods;
507
508 static short CompileOnlyMethodsNum;
509 static short CompileOnlyMethodsMax;
510 static char** CompileOnlyMethods;
511 static bool* CompileOnlyAllClasses;
512
513 static short InterpretOnlyClassesNum;
514 static short InterpretOnlyClassesMax;
515 static char** InterpretOnlyClasses;
516 static bool* InterpretOnlyAllMethods;
517
518 static bool CheckCompileOnly;
519
520 static char* SharedArchivePath;
521
522 public:
523 // Scale compile thresholds
524 // Returns threshold scaled with CompileThresholdScaling
525 static intx scaled_compile_threshold(intx threshold, double scale);
526 static intx scaled_compile_threshold(intx threshold) {
527 return scaled_compile_threshold(threshold, CompileThresholdScaling);
528 }
529 // Returns freq_log scaled with CompileThresholdScaling
530 static intx scaled_freq_log(intx freq_log, double scale);
531 static intx scaled_freq_log(intx freq_log) {
532 return scaled_freq_log(freq_log, CompileThresholdScaling);
533 }
534
535 // Parses the arguments, first phase
536 static jint parse(const JavaVMInitArgs* args);
537 // Apply ergonomics
538 static jint apply_ergo();
539 // Adjusts the arguments after the OS have adjusted the arguments
540 static jint adjust_after_os();
541
542 #if INCLUDE_JVMCI
543 // Check consistency of jvmci vm argument settings.
544 static bool check_jvmci_args_consistency();
545 static void set_jvmci_specific_flags();
546 #endif
547 // Check for consistency in the selection of the garbage collector.
548 static bool check_gc_consistency(); // Check user-selected gc
549 // Check consistency or otherwise of VM argument settings
550 static bool check_vm_args_consistency();
551 // Used by os_solaris
552 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized);
553
554 static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; }
555 // Return the maximum size a heap with compressed oops can take
556 static size_t max_heap_for_compressed_oops();
557
558 // return a char* array containing all options
559 static char** jvm_flags_array() { return _jvm_flags_array; }
560 static char** jvm_args_array() { return _jvm_args_array; }
561 static int num_jvm_flags() { return _num_jvm_flags; }
562 static int num_jvm_args() { return _num_jvm_args; }
563 // return the arguments passed to the Java application
564 static const char* java_command() { return _java_command; }
565
566 // print jvm_flags, jvm_args and java_command
567 static void print_on(outputStream* st);
568 static void print_summary_on(outputStream* st);
569
570 // convenient methods to get and set jvm_flags_file
571 static const char* get_jvm_flags_file() { return _jvm_flags_file; }
572 static void set_jvm_flags_file(const char *value) {
573 if (_jvm_flags_file != NULL) {
574 os::free(_jvm_flags_file);
575 }
576 _jvm_flags_file = os::strdup_check_oom(value);
577 }
578 // convenient methods to obtain / print jvm_flags and jvm_args
579 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); }
580 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); }
581 static void print_jvm_flags_on(outputStream* st);
582 static void print_jvm_args_on(outputStream* st);
583
584 // -Dkey=value flags
585 static SystemProperty* system_properties() { return _system_properties; }
586 static const char* get_property(const char* key);
587
588 // -Djava.vendor.url.bug
589 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; }
590
591 // -Dsun.java.launcher
592 static const char* sun_java_launcher() { return _sun_java_launcher; }
593 // Was VM created by a Java launcher?
594 static bool created_by_java_launcher();
595 // -Dsun.java.launcher.is_altjvm
596 static bool sun_java_launcher_is_altjvm();
597 // -Dsun.java.launcher.pid
598 static int sun_java_launcher_pid() { return _sun_java_launcher_pid; }
599
600 // -Xms
601 static size_t min_heap_size() { return _min_heap_size; }
602 static void set_min_heap_size(size_t v) { _min_heap_size = v; }
603
604 // -Xrun
605 static AgentLibrary* libraries() { return _libraryList.first(); }
606 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); }
607 static void convert_library_to_agent(AgentLibrary* lib)
608 { _libraryList.remove(lib);
609 _agentList.add(lib); }
610
611 // -agentlib -agentpath
612 static AgentLibrary* agents() { return _agentList.first(); }
613 static bool init_agents_at_startup() { return !_agentList.is_empty(); }
614
615 // abort, exit, vfprintf hooks
616 static abort_hook_t abort_hook() { return _abort_hook; }
617 static exit_hook_t exit_hook() { return _exit_hook; }
618 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; }
619
620 static bool GetCheckCompileOnly () { return CheckCompileOnly; }
621
622 static const char* GetSharedArchivePath() { return SharedArchivePath; }
623
624 static bool CompileMethod(char* className, char* methodName) {
625 return
626 methodExists(
627 className, methodName,
628 CompileOnlyClassesNum, CompileOnlyClasses, CompileOnlyAllMethods,
629 CompileOnlyMethodsNum, CompileOnlyMethods, CompileOnlyAllClasses
630 );
631 }
632
633 // Java launcher properties
634 static void process_sun_java_launcher_properties(JavaVMInitArgs* args);
635
636 // System properties
637 static void init_system_properties();
638
639 // Update/Initialize System properties after JDK version number is known
640 static void init_version_specific_system_properties();
641
642 // Property List manipulation
643 static void PropertyList_add(SystemProperty *element);
644 static void PropertyList_add(SystemProperty** plist, SystemProperty *element);
645 static void PropertyList_add(SystemProperty** plist, const char* k, const char* v, bool writeable, bool internal);
646
647 static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
648 PropertyAppendable append, PropertyWriteable writeable,
649 PropertyInternal internal);
650 static const char* PropertyList_get_value(SystemProperty* plist, const char* key);
651 static const char* PropertyList_get_readable_value(SystemProperty* plist, const char* key);
652 static int PropertyList_count(SystemProperty* pl);
653 static int PropertyList_readable_count(SystemProperty* pl);
654 static const char* PropertyList_get_key_at(SystemProperty* pl,int index);
655 static char* PropertyList_get_value_at(SystemProperty* pl,int index);
656
657 static bool is_internal_module_property(const char* option);
658
659 // Miscellaneous System property value getter and setters.
660 static void set_dll_dir(const char *value) { _sun_boot_library_path->set_value(value); }
661 static void set_java_home(const char *value) { _java_home->set_value(value); }
662 static void set_library_path(const char *value) { _java_library_path->set_value(value); }
663 static void set_ext_dirs(char *value) { _ext_dirs = os::strdup_check_oom(value); }
664
665 // Set up the underlying pieces of the system boot class path
666 static void add_patch_mod_prefix(const char *module_name, const char *path, bool* patch_mod_javabase);
667 static void set_sysclasspath(const char *value, bool has_jimage) {
668 // During start up, set by os::set_boot_path()
669 assert(get_sysclasspath() == NULL, "System boot class path previously set");
670 _system_boot_class_path->set_value(value);
671 _has_jimage = has_jimage;
672 }
673 static void append_sysclasspath(const char *value) {
674 _system_boot_class_path->append_value(value);
675 _jdk_boot_class_path_append->append_value(value);
676 }
677
678 static GrowableArray<ModulePatchPath*>* get_patch_mod_prefix() { return _patch_mod_prefix; }
679 static char* get_sysclasspath() { return _system_boot_class_path->value(); }
680 static char* get_jdk_boot_class_path_append() { return _jdk_boot_class_path_append->value(); }
681 static bool has_jimage() { return _has_jimage; }
682
683 static char* get_java_home() { return _java_home->value(); }
684 static char* get_dll_dir() { return _sun_boot_library_path->value(); }
685 static char* get_ext_dirs() { return _ext_dirs; }
686 static char* get_appclasspath() { return _java_class_path->value(); }
687 static void fix_appclasspath();
688
689
690 // Operation modi
691 static Mode mode() { return _mode; }
692 static bool is_interpreter_only() { return mode() == _int; }
693
694
695 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid.
696 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen);
697
698 static void check_unsupported_dumping_properties() NOT_CDS_RETURN;
699
700 static bool atojulong(const char *s, julong* result);
701 };
702
703 // Disable options not supported in this release, with a warning if they
704 // were explicitly requested on the command-line
705 #define UNSUPPORTED_OPTION(opt) \
706 do { \
707 if (opt) { \
708 if (FLAG_IS_CMDLINE(opt)) { \
709 warning("-XX:+" #opt " not supported in this VM"); \
710 } \
711 FLAG_SET_DEFAULT(opt, false); \
712 } \
713 } while(0)
714
715 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP