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/flags/jvmFlag.hpp"
32 #include "runtime/java.hpp"
33 #include "runtime/os.hpp"
34 #include "runtime/perfData.hpp"
35 #include "utilities/debug.hpp"
36
37 // Arguments parses the command line and recognizes options
38
39 // Invocation API hook typedefs (these should really be defined in jni.hpp)
40 extern "C" {
41 typedef void (JNICALL *abort_hook_t)(void);
42 typedef void (JNICALL *exit_hook_t)(jint code);
43 typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args) ATTRIBUTE_PRINTF(2, 0);
44 }
45
46 // Obsolete or deprecated -XX flag.
47 struct SpecialFlag {
48 const char* name;
49 JDK_Version deprecated_in; // When the deprecation warning started (or "undefined").
50 JDK_Version obsolete_in; // When the obsolete warning started (or "undefined").
51 JDK_Version expired_in; // When the option expires (or "undefined").
52 };
53
54 // PathString is used as:
55 // - the underlying value for a SystemProperty
56 // - the path portion of an --patch-module module/path pair
57 // - the string that represents the system boot class path, Arguments::_system_boot_class_path.
58 class PathString : public CHeapObj<mtArguments> {
59 protected:
60 char* _value;
61 public:
62 char* value() const { return _value; }
63
64 bool set_value(const char *value);
65 void append_value(const char *value);
66
67 PathString(const char* value);
68 ~PathString();
69 };
70
71 // ModulePatchPath records the module/path pair as specified to --patch-module.
72 class ModulePatchPath : public CHeapObj<mtInternal> {
73 private:
74 char* _module_name;
75 PathString* _path;
76 public:
77 ModulePatchPath(const char* module_name, const char* path);
78 ~ModulePatchPath();
79
80 inline void set_path(const char* path) { _path->set_value(path); }
81 inline const char* module_name() const { return _module_name; }
82 inline char* path_string() const { return _path->value(); }
83 };
84
85 // Element describing System and User (-Dkey=value flags) defined property.
86 //
87 // An internal SystemProperty is one that has been removed in
88 // jdk.internal.VM.saveAndRemoveProperties, like jdk.boot.class.path.append.
89 //
90 class SystemProperty : public PathString {
91 private:
92 char* _key;
93 SystemProperty* _next;
94 bool _internal;
95 bool _writeable;
96 bool writeable() { return _writeable; }
97
98 public:
99 // Accessors
100 char* value() const { return PathString::value(); }
101 const char* key() const { return _key; }
102 bool internal() const { return _internal; }
103 SystemProperty* next() const { return _next; }
104 void set_next(SystemProperty* next) { _next = next; }
105
106 bool is_readable() const {
107 return !_internal || strcmp(_key, "jdk.boot.class.path.append") == 0;
108 }
109
110 // A system property should only have its value set
111 // via an external interface if it is a writeable property.
112 // The internal, non-writeable property jdk.boot.class.path.append
113 // is the only exception to this rule. It can be set externally
114 // via -Xbootclasspath/a or JVMTI OnLoad phase call to AddToBootstrapClassLoaderSearch.
115 // In those cases for jdk.boot.class.path.append, the base class
116 // set_value and append_value methods are called directly.
117 bool set_writeable_value(const char *value) {
118 if (writeable()) {
119 return set_value(value);
120 }
121 return false;
122 }
123
124 // Constructor
125 SystemProperty(const char* key, const char* value, bool writeable, bool internal = false);
126 };
127
128
129 // For use by -agentlib, -agentpath and -Xrun
130 class AgentLibrary : public CHeapObj<mtArguments> {
131 friend class AgentLibraryList;
132 public:
133 // Is this library valid or not. Don't rely on os_lib == NULL as statically
134 // linked lib could have handle of RTLD_DEFAULT which == 0 on some platforms
135 enum AgentState {
136 agent_invalid = 0,
137 agent_valid = 1
138 };
139
140 private:
141 char* _name;
142 char* _options;
143 void* _os_lib;
144 bool _is_absolute_path;
145 bool _is_static_lib;
146 bool _is_instrument_lib;
147 AgentState _state;
148 AgentLibrary* _next;
149
150 public:
151 // Accessors
152 const char* name() const { return _name; }
153 char* options() const { return _options; }
154 bool is_absolute_path() const { return _is_absolute_path; }
155 void* os_lib() const { return _os_lib; }
156 void set_os_lib(void* os_lib) { _os_lib = os_lib; }
157 AgentLibrary* next() const { return _next; }
158 bool is_static_lib() const { return _is_static_lib; }
159 bool is_instrument_lib() const { return _is_instrument_lib; }
160 void set_static_lib(bool is_static_lib) { _is_static_lib = is_static_lib; }
161 bool valid() { return (_state == agent_valid); }
162 void set_valid() { _state = agent_valid; }
163 void set_invalid() { _state = agent_invalid; }
164
165 // Constructor
166 AgentLibrary(const char* name, const char* options, bool is_absolute_path,
167 void* os_lib, bool instrument_lib=false);
168 };
169
170 // maintain an order of entry list of AgentLibrary
171 class AgentLibraryList {
172 private:
173 AgentLibrary* _first;
174 AgentLibrary* _last;
175 public:
176 bool is_empty() const { return _first == NULL; }
177 AgentLibrary* first() const { return _first; }
178
179 // add to the end of the list
180 void add(AgentLibrary* lib) {
181 if (is_empty()) {
182 _first = _last = lib;
183 } else {
184 _last->_next = lib;
185 _last = lib;
186 }
187 lib->_next = NULL;
188 }
189
190 // search for and remove a library known to be in the list
191 void remove(AgentLibrary* lib) {
192 AgentLibrary* curr;
193 AgentLibrary* prev = NULL;
194 for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) {
195 if (curr == lib) {
196 break;
197 }
198 }
199 assert(curr != NULL, "always should be found");
200
201 if (curr != NULL) {
202 // it was found, by-pass this library
203 if (prev == NULL) {
204 _first = curr->_next;
205 } else {
206 prev->_next = curr->_next;
207 }
208 if (curr == _last) {
209 _last = prev;
210 }
211 curr->_next = NULL;
212 }
213 }
214
215 AgentLibraryList() {
216 _first = NULL;
217 _last = NULL;
218 }
219 };
220
221 // Helper class for controlling the lifetime of JavaVMInitArgs objects.
222 class ScopedVMInitArgs;
223
224 // Most logging functions require 5 tags. Some of them may be _NO_TAG.
225 typedef struct {
226 const char* alias_name;
227 LogLevelType level;
228 bool exactMatch;
229 LogTagType tag0;
230 LogTagType tag1;
231 LogTagType tag2;
232 LogTagType tag3;
233 LogTagType tag4;
234 LogTagType tag5;
235 } AliasedLoggingFlag;
236
237 class Arguments : AllStatic {
238 friend class VMStructs;
239 friend class JvmtiExport;
240 friend class CodeCacheExtensions;
241 friend class ArgumentsTest;
242 public:
243 // Operation modi
244 enum Mode {
245 _int, // corresponds to -Xint
246 _mixed, // corresponds to -Xmixed
247 _comp // corresponds to -Xcomp
248 };
249
250 enum ArgsRange {
251 arg_unreadable = -3,
252 arg_too_small = -2,
253 arg_too_big = -1,
254 arg_in_range = 0
255 };
256
257 enum PropertyAppendable {
258 AppendProperty,
259 AddProperty
260 };
261
262 enum PropertyWriteable {
263 WriteableProperty,
264 UnwriteableProperty
265 };
266
267 enum PropertyInternal {
268 InternalProperty,
269 ExternalProperty
270 };
271
272 private:
273
274 // a pointer to the flags file name if it is specified
275 static char* _jvm_flags_file;
276 // an array containing all flags specified in the .hotspotrc file
277 static char** _jvm_flags_array;
278 static int _num_jvm_flags;
279 // an array containing all jvm arguments specified in the command line
280 static char** _jvm_args_array;
281 static int _num_jvm_args;
282 // string containing all java command (class/jarfile name and app args)
283 static char* _java_command;
284
285 // Property list
286 static SystemProperty* _system_properties;
287
288 // Quick accessor to System properties in the list:
289 static SystemProperty *_sun_boot_library_path;
290 static SystemProperty *_java_library_path;
291 static SystemProperty *_java_home;
292 static SystemProperty *_java_class_path;
293 static SystemProperty *_jdk_boot_class_path_append;
294
295 // --patch-module=module=<file>(<pathsep><file>)*
296 // Each element contains the associated module name, path
297 // string pair as specified to --patch-module.
298 static GrowableArray<ModulePatchPath*>* _patch_mod_prefix;
299
300 // The constructed value of the system class path after
301 // argument processing and JVMTI OnLoad additions via
302 // calls to AddToBootstrapClassLoaderSearch. This is the
303 // final form before ClassLoader::setup_bootstrap_search().
304 // Note: since --patch-module is a module name/path pair, the
305 // system boot class path string no longer contains the "prefix"
306 // to the boot class path base piece as it did when
307 // -Xbootclasspath/p was supported.
308 static PathString *_system_boot_class_path;
309
310 // Set if a modular java runtime image is present vs. a build with exploded modules
311 static bool _has_jimage;
312
313 // temporary: to emit warning if the default ext dirs are not empty.
314 // remove this variable when the warning is no longer needed.
315 static char* _ext_dirs;
316
317 // java.vendor.url.bug, bug reporting URL for fatal errors.
318 static const char* _java_vendor_url_bug;
319
320 // sun.java.launcher, private property to provide information about
321 // java launcher
322 static const char* _sun_java_launcher;
323
324 // sun.java.launcher.pid, private property
325 static int _sun_java_launcher_pid;
326
327 // was this VM created via the -XXaltjvm=<path> option
328 static bool _sun_java_launcher_is_altjvm;
329
330 // Option flags
331 static const char* _gc_log_filename;
332 // Value of the conservative maximum heap alignment needed
333 static size_t _conservative_max_heap_alignment;
334
335 static uintx _min_heap_size;
336
337 // -Xrun arguments
338 static AgentLibraryList _libraryList;
339 static void add_init_library(const char* name, char* options);
340
341 // -agentlib and -agentpath arguments
342 static AgentLibraryList _agentList;
343 static void add_init_agent(const char* name, char* options, bool absolute_path);
344 static void add_instrument_agent(const char* name, char* options, bool absolute_path);
345
346 // Late-binding agents not started via arguments
347 static void add_loaded_agent(AgentLibrary *agentLib);
348 static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib);
349
350 // Operation modi
351 static Mode _mode;
352 static void set_mode_flags(Mode mode);
353 static bool _java_compiler;
354 static void set_java_compiler(bool arg) { _java_compiler = arg; }
355 static bool java_compiler() { return _java_compiler; }
356
357 // -Xdebug flag
358 static bool _xdebug_mode;
359 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; }
360 static bool xdebug_mode() { return _xdebug_mode; }
361
362 // preview features
363 static bool _enable_preview;
364
365 // Used to save default settings
366 static bool _AlwaysCompileLoopMethods;
367 static bool _UseOnStackReplacement;
368 static bool _BackgroundCompilation;
369 static bool _ClipInlining;
370 static bool _CIDynamicCompilePriority;
371 static intx _Tier3InvokeNotifyFreqLog;
372 static intx _Tier4InvocationThreshold;
373
374 // Compilation mode.
375 static bool compilation_mode_selected();
376 static void select_compilation_mode_ergonomically();
377
378 // Tiered
379 static void set_tiered_flags();
380
381 // GC ergonomics
382 static void set_conservative_max_heap_alignment();
383 static void set_use_compressed_oops();
384 static void set_use_compressed_klass_ptrs();
385 static jint set_ergonomics_flags();
386 static void set_shared_spaces_flags();
387 // limits the given memory size by the maximum amount of memory this process is
388 // currently allowed to allocate or reserve.
389 static julong limit_by_allocatable_memory(julong size);
390 // Setup heap size
391 static void set_heap_size();
392
393 // Bytecode rewriting
394 static void set_bytecode_flags();
395
396 // Invocation API hooks
397 static abort_hook_t _abort_hook;
398 static exit_hook_t _exit_hook;
399 static vfprintf_hook_t _vfprintf_hook;
400
401 // System properties
402 static bool add_property(const char* prop, PropertyWriteable writeable=WriteableProperty,
403 PropertyInternal internal=ExternalProperty);
404
405 static bool create_property(const char* prop_name, const char* prop_value, PropertyInternal internal);
406 static bool create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count);
407
408 static int process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase);
409
410 // Aggressive optimization flags.
411 static jint set_aggressive_opts_flags();
412
413 static jint set_aggressive_heap_flags();
414
415 // Argument parsing
416 static void do_pd_flag_adjustments();
417 static bool parse_argument(const char* arg, JVMFlag::Flags origin);
418 static bool process_argument(const char* arg, jboolean ignore_unrecognized, JVMFlag::Flags origin);
419 static void process_java_launcher_argument(const char*, void*);
420 static void process_java_compiler_argument(const char* arg);
421 static jint parse_options_environment_variable(const char* name, ScopedVMInitArgs* vm_args);
422 static jint parse_java_tool_options_environment_variable(ScopedVMInitArgs* vm_args);
423 static jint parse_java_options_environment_variable(ScopedVMInitArgs* vm_args);
424 static jint parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args);
425 static jint parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args);
426 static jint parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize);
427 static jint insert_vm_options_file(const JavaVMInitArgs* args,
428 const char* vm_options_file,
429 const int vm_options_file_pos,
430 ScopedVMInitArgs* vm_options_file_args,
431 ScopedVMInitArgs* args_out);
432 static bool args_contains_vm_options_file_arg(const JavaVMInitArgs* args);
433 static jint expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
434 ScopedVMInitArgs* mod_args,
435 JavaVMInitArgs** args_out);
436 static jint match_special_option_and_act(const JavaVMInitArgs* args,
437 ScopedVMInitArgs* args_out);
438
439 static bool handle_deprecated_print_gc_flags();
440
441 static void handle_extra_cms_flags(const char* msg);
442
443 static jint parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
444 const JavaVMInitArgs *java_options_args,
445 const JavaVMInitArgs *cmd_line_args);
446 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, JVMFlag::Flags origin);
447 static jint finalize_vm_init_args(bool patch_mod_javabase);
448 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type);
449
450 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) {
451 return is_bad_option(option, ignore, NULL);
452 }
453
454 static void describe_range_error(ArgsRange errcode);
455 static ArgsRange check_memory_size(julong size, julong min_size, julong max_size);
456 static ArgsRange parse_memory_size(const char* s, julong* long_arg,
457 julong min_size, julong max_size = max_uintx);
458 // Parse a string for a unsigned integer. Returns true if value
459 // is an unsigned integer greater than or equal to the minimum
460 // parameter passed and returns the value in uintx_arg. Returns
461 // false otherwise, with uintx_arg undefined.
462 static bool parse_uintx(const char* value, uintx* uintx_arg,
463 uintx min_size);
464
465 // methods to build strings from individual args
466 static void build_jvm_args(const char* arg);
467 static void build_jvm_flags(const char* arg);
468 static void add_string(char*** bldarray, int* count, const char* arg);
469 static const char* build_resource_string(char** args, int count);
470
471 static bool methodExists(
472 char* className, char* methodName,
473 int classesNum, char** classes, bool* allMethods,
474 int methodsNum, char** methods, bool* allClasses
475 );
476
477 static void parseOnlyLine(
478 const char* line,
479 short* classesNum, short* classesMax, char*** classes, bool** allMethods,
480 short* methodsNum, short* methodsMax, char*** methods, bool** allClasses
481 );
482
483 // Returns true if the flag is obsolete (and not yet expired).
484 // In this case the 'version' buffer is filled in with
485 // the version number when the flag became obsolete.
486 static bool is_obsolete_flag(const char* flag_name, JDK_Version* version);
487
488 #ifndef PRODUCT
489 static const char* removed_develop_logging_flag_name(const char* name);
490 #endif // PRODUCT
491
492 // Returns 1 if the flag is deprecated (and not yet obsolete or expired).
493 // In this case the 'version' buffer is filled in with the version number when
494 // the flag became deprecated.
495 // Returns -1 if the flag is expired or obsolete.
496 // Returns 0 otherwise.
497 static int is_deprecated_flag(const char* flag_name, JDK_Version* version);
498
499 // Return the real name for the flag passed on the command line (either an alias name or "flag_name").
500 static const char* real_flag_name(const char *flag_name);
501
502 // Return the "real" name for option arg if arg is an alias, and print a warning if arg is deprecated.
503 // Return NULL if the arg has expired.
504 static const char* handle_aliases_and_deprecation(const char* arg, bool warn);
505 static bool lookup_logging_aliases(const char* arg, char* buffer);
506 static AliasedLoggingFlag catch_logging_aliases(const char* name, bool on);
507 static short CompileOnlyClassesNum;
508 static short CompileOnlyClassesMax;
509 static char** CompileOnlyClasses;
510 static bool* CompileOnlyAllMethods;
511
512 static short CompileOnlyMethodsNum;
513 static short CompileOnlyMethodsMax;
514 static char** CompileOnlyMethods;
515 static bool* CompileOnlyAllClasses;
516
517 static short InterpretOnlyClassesNum;
518 static short InterpretOnlyClassesMax;
519 static char** InterpretOnlyClasses;
520 static bool* InterpretOnlyAllMethods;
521
522 static bool CheckCompileOnly;
523
524 static char* SharedArchivePath;
525
526 public:
527 // Scale compile thresholds
528 // Returns threshold scaled with CompileThresholdScaling
529 static intx scaled_compile_threshold(intx threshold, double scale);
530 static intx scaled_compile_threshold(intx threshold) {
531 return scaled_compile_threshold(threshold, CompileThresholdScaling);
532 }
533 // Returns freq_log scaled with CompileThresholdScaling
534 static intx scaled_freq_log(intx freq_log, double scale);
535 static intx scaled_freq_log(intx freq_log) {
536 return scaled_freq_log(freq_log, CompileThresholdScaling);
537 }
538
539 // Parses the arguments, first phase
540 static jint parse(const JavaVMInitArgs* args);
541 // Apply ergonomics
542 static jint apply_ergo();
543 // Adjusts the arguments after the OS have adjusted the arguments
544 static jint adjust_after_os();
545
546 #if INCLUDE_JVMCI
547 // Check consistency of jvmci vm argument settings.
548 static bool check_jvmci_args_consistency();
549 static void set_jvmci_specific_flags();
550 #endif
551 // Check for consistency in the selection of the garbage collector.
552 static bool check_gc_consistency(); // Check user-selected gc
553 // Check consistency or otherwise of VM argument settings
554 static bool check_vm_args_consistency();
555 // Used by os_solaris
556 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized);
557
558 static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; }
559 // Return the maximum size a heap with compressed oops can take
560 static size_t max_heap_for_compressed_oops();
561
562 // return a char* array containing all options
563 static char** jvm_flags_array() { return _jvm_flags_array; }
564 static char** jvm_args_array() { return _jvm_args_array; }
565 static int num_jvm_flags() { return _num_jvm_flags; }
566 static int num_jvm_args() { return _num_jvm_args; }
567 // return the arguments passed to the Java application
568 static const char* java_command() { return _java_command; }
569
570 // print jvm_flags, jvm_args and java_command
571 static void print_on(outputStream* st);
572 static void print_summary_on(outputStream* st);
573
574 // convenient methods to get and set jvm_flags_file
575 static const char* get_jvm_flags_file() { return _jvm_flags_file; }
576 static void set_jvm_flags_file(const char *value) {
577 if (_jvm_flags_file != NULL) {
578 os::free(_jvm_flags_file);
579 }
580 _jvm_flags_file = os::strdup_check_oom(value);
581 }
582 // convenient methods to obtain / print jvm_flags and jvm_args
583 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); }
584 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); }
585 static void print_jvm_flags_on(outputStream* st);
586 static void print_jvm_args_on(outputStream* st);
587
588 // -Dkey=value flags
589 static SystemProperty* system_properties() { return _system_properties; }
590 static const char* get_property(const char* key);
591
592 // -Djava.vendor.url.bug
593 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; }
594
595 // -Dsun.java.launcher
596 static const char* sun_java_launcher() { return _sun_java_launcher; }
597 // Was VM created by a Java launcher?
598 static bool created_by_java_launcher();
599 // -Dsun.java.launcher.is_altjvm
600 static bool sun_java_launcher_is_altjvm();
601 // -Dsun.java.launcher.pid
602 static int sun_java_launcher_pid() { return _sun_java_launcher_pid; }
603
604 // -Xms
605 static size_t min_heap_size() { return _min_heap_size; }
606 static void set_min_heap_size(size_t v) { _min_heap_size = v; }
607
608 // -Xrun
609 static AgentLibrary* libraries() { return _libraryList.first(); }
610 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); }
611 static void convert_library_to_agent(AgentLibrary* lib)
612 { _libraryList.remove(lib);
613 _agentList.add(lib); }
614
615 // -agentlib -agentpath
616 static AgentLibrary* agents() { return _agentList.first(); }
617 static bool init_agents_at_startup() { return !_agentList.is_empty(); }
618
619 // abort, exit, vfprintf hooks
620 static abort_hook_t abort_hook() { return _abort_hook; }
621 static exit_hook_t exit_hook() { return _exit_hook; }
622 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; }
623
624 static bool GetCheckCompileOnly () { return CheckCompileOnly; }
625
626 static const char* GetSharedArchivePath() { return SharedArchivePath; }
627
628 static bool CompileMethod(char* className, char* methodName) {
629 return
630 methodExists(
631 className, methodName,
632 CompileOnlyClassesNum, CompileOnlyClasses, CompileOnlyAllMethods,
633 CompileOnlyMethodsNum, CompileOnlyMethods, CompileOnlyAllClasses
634 );
635 }
636
637 // Java launcher properties
638 static void process_sun_java_launcher_properties(JavaVMInitArgs* args);
639
640 // System properties
641 static void init_system_properties();
642
643 // Update/Initialize System properties after JDK version number is known
644 static void init_version_specific_system_properties();
645
646 // Property List manipulation
647 static void PropertyList_add(SystemProperty *element);
648 static void PropertyList_add(SystemProperty** plist, SystemProperty *element);
649 static void PropertyList_add(SystemProperty** plist, const char* k, const char* v, bool writeable, bool internal);
650
651 static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
652 PropertyAppendable append, PropertyWriteable writeable,
653 PropertyInternal internal);
654 static const char* PropertyList_get_value(SystemProperty* plist, const char* key);
655 static const char* PropertyList_get_readable_value(SystemProperty* plist, const char* key);
656 static int PropertyList_count(SystemProperty* pl);
657 static int PropertyList_readable_count(SystemProperty* pl);
658 static const char* PropertyList_get_key_at(SystemProperty* pl,int index);
659 static char* PropertyList_get_value_at(SystemProperty* pl,int index);
660
661 static bool is_internal_module_property(const char* option);
662
663 // Miscellaneous System property value getter and setters.
664 static void set_dll_dir(const char *value) { _sun_boot_library_path->set_value(value); }
665 static void set_java_home(const char *value) { _java_home->set_value(value); }
666 static void set_library_path(const char *value) { _java_library_path->set_value(value); }
667 static void set_ext_dirs(char *value) { _ext_dirs = os::strdup_check_oom(value); }
668
669 // Set up the underlying pieces of the system boot class path
670 static void add_patch_mod_prefix(const char *module_name, const char *path, bool* patch_mod_javabase);
671 static void set_sysclasspath(const char *value, bool has_jimage) {
672 // During start up, set by os::set_boot_path()
673 assert(get_sysclasspath() == NULL, "System boot class path previously set");
674 _system_boot_class_path->set_value(value);
675 _has_jimage = has_jimage;
676 }
677 static void append_sysclasspath(const char *value) {
678 _system_boot_class_path->append_value(value);
679 _jdk_boot_class_path_append->append_value(value);
680 }
681
682 static GrowableArray<ModulePatchPath*>* get_patch_mod_prefix() { return _patch_mod_prefix; }
683 static char* get_sysclasspath() { return _system_boot_class_path->value(); }
684 static char* get_jdk_boot_class_path_append() { return _jdk_boot_class_path_append->value(); }
685 static bool has_jimage() { return _has_jimage; }
686
687 static char* get_java_home() { return _java_home->value(); }
688 static char* get_dll_dir() { return _sun_boot_library_path->value(); }
689 static char* get_ext_dirs() { return _ext_dirs; }
690 static char* get_appclasspath() { return _java_class_path->value(); }
691 static void fix_appclasspath();
692
693
694 // Operation modi
695 static Mode mode() { return _mode; }
696 static bool is_interpreter_only() { return mode() == _int; }
697
698 // preview features
699 static void set_enable_preview() { _enable_preview = true; }
700 static bool enable_preview() { return _enable_preview; }
701
702 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid.
703 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen);
704
705 static void check_unsupported_dumping_properties() NOT_CDS_RETURN;
706
707 static bool check_unsupported_cds_runtime_properties() NOT_CDS_RETURN0;
708
709 static bool atojulong(const char *s, julong* result);
710 };
711
712 // Disable options not supported in this release, with a warning if they
713 // were explicitly requested on the command-line
714 #define UNSUPPORTED_OPTION(opt) \
715 do { \
716 if (opt) { \
717 if (FLAG_IS_CMDLINE(opt)) { \
718 warning("-XX:+" #opt " not supported in this VM"); \
719 } \
720 FLAG_SET_DEFAULT(opt, false); \
721 } \
722 } while(0)
723
724 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP