1 /*
2 * Copyright (c) 1997, 2022, 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_RUNTIME_ARGUMENTS_HPP
26 #define SHARE_RUNTIME_ARGUMENTS_HPP
27
28 #include "logging/logLevel.hpp"
29 #include "logging/logTag.hpp"
30 #include "memory/allStatic.hpp"
31 #include "memory/allocation.hpp"
32 #include "runtime/globals.hpp"
33 #include "runtime/java.hpp"
34 #include "runtime/os.hpp"
35 #include "utilities/debug.hpp"
36 #include "utilities/vmEnums.hpp"
37
38 // Arguments parses the command line and recognizes options
39
40 class JVMFlag;
41
42 // Invocation API hook typedefs (these should really be defined in jni.h)
43 extern "C" {
44 typedef void (JNICALL *abort_hook_t)(void);
45 typedef void (JNICALL *exit_hook_t)(jint code);
46 typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args) ATTRIBUTE_PRINTF(2, 0);
47 }
48
49 // Obsolete or deprecated -XX flag.
50 struct SpecialFlag {
51 const char* name;
52 JDK_Version deprecated_in; // When the deprecation warning started (or "undefined").
53 JDK_Version obsolete_in; // When the obsolete warning started (or "undefined").
54 JDK_Version expired_in; // When the option expires (or "undefined").
55 };
56
57 struct LegacyGCLogging {
58 const char* file; // NULL -> stdout
59 int lastFlag; // 0 not set; 1 -> -verbose:gc; 2 -> -Xloggc
60 };
61
62 // PathString is used as:
63 // - the underlying value for a SystemProperty
64 // - the path portion of an --patch-module module/path pair
65 // - the string that represents the boot class path, Arguments::_boot_class_path.
66 class PathString : public CHeapObj<mtArguments> {
67 protected:
68 char* _value;
69 public:
70 char* value() const { return _value; }
71
72 // return false iff OOM && alloc_failmode == AllocFailStrategy::RETURN_NULL
73 bool set_value(const char *value, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
74 void append_value(const char *value);
75
76 PathString(const char* value);
77 ~PathString();
78 };
79
80 // ModulePatchPath records the module/path pair as specified to --patch-module.
81 class ModulePatchPath : public CHeapObj<mtInternal> {
82 private:
83 char* _module_name;
84 PathString* _path;
85 public:
86 ModulePatchPath(const char* module_name, const char* path);
87 ~ModulePatchPath();
88
89 inline const char* module_name() const { return _module_name; }
90 inline char* path_string() const { return _path->value(); }
91 };
92
93 // Element describing System and User (-Dkey=value flags) defined property.
94 //
95 // An internal SystemProperty is one that has been removed in
96 // jdk.internal.VM.saveAndRemoveProperties, like jdk.boot.class.path.append.
97 //
98 class SystemProperty : public PathString {
99 private:
100 char* _key;
101 SystemProperty* _next;
102 bool _internal;
103 bool _writeable;
104
105 public:
106 // Accessors
107 char* value() const { return PathString::value(); }
108 const char* key() const { return _key; }
109 bool internal() const { return _internal; }
110 SystemProperty* next() const { return _next; }
111 void set_next(SystemProperty* next) { _next = next; }
112 bool writeable() const { return _writeable; }
113
114 bool readable() const {
115 return !_internal || (strcmp(_key, "jdk.boot.class.path.append") == 0 &&
116 value() != NULL);
117 }
118
119 // A system property should only have its value set
120 // via an external interface if it is a writeable property.
121 // The internal, non-writeable property jdk.boot.class.path.append
122 // is the only exception to this rule. It can be set externally
123 // via -Xbootclasspath/a or JVMTI OnLoad phase call to AddToBootstrapClassLoaderSearch.
124 // In those cases for jdk.boot.class.path.append, the base class
125 // set_value and append_value methods are called directly.
126 void set_writeable_value(const char *value) {
127 if (writeable()) {
128 set_value(value);
129 }
130 }
131 void append_writeable_value(const char *value) {
132 if (writeable()) {
133 append_value(value);
134 }
135 }
136
137 // Constructor
138 SystemProperty(const char* key, const char* value, bool writeable, bool internal = false);
139 };
140
141
142 // For use by -agentlib, -agentpath and -Xrun
143 class AgentLibrary : public CHeapObj<mtArguments> {
144 friend class AgentLibraryList;
145 public:
146 // Is this library valid or not. Don't rely on os_lib == NULL as statically
147 // linked lib could have handle of RTLD_DEFAULT which == 0 on some platforms
148 enum AgentState {
149 agent_invalid = 0,
150 agent_valid = 1
151 };
152
153 private:
154 char* _name;
155 char* _options;
156 void* _os_lib;
157 bool _is_absolute_path;
158 bool _is_static_lib;
159 bool _is_instrument_lib;
160 AgentState _state;
161 AgentLibrary* _next;
162
163 public:
164 // Accessors
165 const char* name() const { return _name; }
166 char* options() const { return _options; }
167 bool is_absolute_path() const { return _is_absolute_path; }
168 void* os_lib() const { return _os_lib; }
169 void set_os_lib(void* os_lib) { _os_lib = os_lib; }
170 AgentLibrary* next() const { return _next; }
171 bool is_static_lib() const { return _is_static_lib; }
172 bool is_instrument_lib() const { return _is_instrument_lib; }
173 void set_static_lib(bool is_static_lib) { _is_static_lib = is_static_lib; }
174 bool valid() { return (_state == agent_valid); }
175 void set_valid() { _state = agent_valid; }
176
177 // Constructor
178 AgentLibrary(const char* name, const char* options, bool is_absolute_path,
179 void* os_lib, bool instrument_lib=false);
180 };
181
182 // maintain an order of entry list of AgentLibrary
183 class AgentLibraryList {
184 private:
185 AgentLibrary* _first;
186 AgentLibrary* _last;
187 public:
188 bool is_empty() const { return _first == NULL; }
189 AgentLibrary* first() const { return _first; }
190
191 // add to the end of the list
192 void add(AgentLibrary* lib) {
193 if (is_empty()) {
194 _first = _last = lib;
195 } else {
196 _last->_next = lib;
197 _last = lib;
198 }
199 lib->_next = NULL;
200 }
201
202 // search for and remove a library known to be in the list
203 void remove(AgentLibrary* lib) {
204 AgentLibrary* curr;
205 AgentLibrary* prev = NULL;
206 for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) {
207 if (curr == lib) {
208 break;
209 }
210 }
211 assert(curr != NULL, "always should be found");
212
213 if (curr != NULL) {
214 // it was found, by-pass this library
215 if (prev == NULL) {
216 _first = curr->_next;
217 } else {
218 prev->_next = curr->_next;
219 }
220 if (curr == _last) {
221 _last = prev;
222 }
223 curr->_next = NULL;
224 }
225 }
226
227 AgentLibraryList() {
228 _first = NULL;
229 _last = NULL;
230 }
231 };
232
233 // Helper class for controlling the lifetime of JavaVMInitArgs objects.
234 class ScopedVMInitArgs;
235
236 class Arguments : AllStatic {
237 friend class VMStructs;
238 friend class JvmtiExport;
239 friend class CodeCacheExtensions;
240 friend class ArgumentsTest;
241 friend class LargeOptionsTest;
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 static SystemProperty *_vm_info;
295
296 // --patch-module=module=<file>(<pathsep><file>)*
297 // Each element contains the associated module name, path
298 // string pair as specified to --patch-module.
299 static GrowableArray<ModulePatchPath*>* _patch_mod_prefix;
300
301 // The constructed value of the system class path after
302 // argument processing and JVMTI OnLoad additions via
303 // calls to AddToBootstrapClassLoaderSearch. This is the
304 // final form before ClassLoader::setup_bootstrap_search().
305 // Note: since --patch-module is a module name/path pair, the
306 // boot class path string no longer contains the "prefix"
307 // to the boot class path base piece as it did when
308 // -Xbootclasspath/p was supported.
309 static PathString* _boot_class_path;
310
311 // Set if a modular java runtime image is present vs. a build with exploded modules
312 static bool _has_jimage;
313
314 // temporary: to emit warning if the default ext dirs are not empty.
315 // remove this variable when the warning is no longer needed.
316 static char* _ext_dirs;
317
318 // java.vendor.url.bug, bug reporting URL for fatal errors.
319 static const char* _java_vendor_url_bug;
320
321 // sun.java.launcher, private property to provide information about
322 // java launcher
323 static const char* _sun_java_launcher;
324
325 // was this VM created via the -XXaltjvm=<path> option
326 static bool _sun_java_launcher_is_altjvm;
327
328 // for legacy gc options (-verbose:gc and -Xloggc:)
329 static LegacyGCLogging _legacyGCLogging;
330
331 // Value of the conservative maximum heap alignment needed
332 static size_t _conservative_max_heap_alignment;
333
334 // -Xrun arguments
335 static AgentLibraryList _libraryList;
336 static void add_init_library(const char* name, char* options);
337
338 // -agentlib and -agentpath arguments
339 static AgentLibraryList _agentList;
340 static void add_init_agent(const char* name, char* options, bool absolute_path);
341 static void add_instrument_agent(const char* name, char* options, bool absolute_path);
342
343 // Late-binding agents not started via arguments
344 static void add_loaded_agent(AgentLibrary *agentLib);
345
346 // Operation modi
347 static Mode _mode;
348 static void set_mode_flags(Mode mode);
349 static bool _java_compiler;
350 static void set_java_compiler(bool arg) { _java_compiler = arg; }
351 static bool java_compiler() { return _java_compiler; }
352
353 // -Xdebug flag
354 static bool _xdebug_mode;
355 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; }
356 static bool xdebug_mode() { return _xdebug_mode; }
357
358 // preview features
359 static bool _enable_preview;
360
361 // Used to save default settings
362 static bool _AlwaysCompileLoopMethods;
363 static bool _UseOnStackReplacement;
364 static bool _BackgroundCompilation;
365 static bool _ClipInlining;
366
367 // GC ergonomics
368 static void set_conservative_max_heap_alignment();
369 static void set_use_compressed_oops();
370 static void set_use_compressed_klass_ptrs();
371 static jint set_ergonomics_flags();
372 static void set_shared_spaces_flags_and_archive_paths();
373 // Limits the given heap size by the maximum amount of virtual
374 // memory this process is currently allowed to use. It also takes
375 // the virtual-to-physical ratio of the current GC into account.
376 static size_t limit_heap_by_allocatable_memory(size_t size);
377 // Setup heap size
378 static void set_heap_size();
379
380 // Bytecode rewriting
381 static void set_bytecode_flags();
382
383 // Invocation API hooks
384 static abort_hook_t _abort_hook;
385 static exit_hook_t _exit_hook;
386 static vfprintf_hook_t _vfprintf_hook;
387
388 // System properties
389 static bool add_property(const char* prop, PropertyWriteable writeable=WriteableProperty,
390 PropertyInternal internal=ExternalProperty);
391
392 // Used for module system related properties: converted from command-line flags.
393 // Basic properties are writeable as they operate as "last one wins" and will get overwritten.
394 // Numbered properties are never writeable, and always internal.
395 static bool create_module_property(const char* prop_name, const char* prop_value, PropertyInternal internal);
396 static bool create_numbered_module_property(const char* prop_base_name, const char* prop_value, unsigned int count);
397
398 static int process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase);
399
400 // Aggressive optimization flags.
401 static jint set_aggressive_opts_flags();
402
403 static jint set_aggressive_heap_flags();
404
405 // Argument parsing
406 static bool parse_argument(const char* arg, JVMFlagOrigin origin);
407 static bool process_argument(const char* arg, jboolean ignore_unrecognized, JVMFlagOrigin origin);
408 static void process_java_launcher_argument(const char*, void*);
409 static void process_java_compiler_argument(const char* arg);
410 static jint parse_options_environment_variable(const char* name, ScopedVMInitArgs* vm_args);
411 static jint parse_java_tool_options_environment_variable(ScopedVMInitArgs* vm_args);
412 static jint parse_java_options_environment_variable(ScopedVMInitArgs* vm_args);
413 static jint parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args);
414 static jint parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args);
415 static jint parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize);
416 static jint insert_vm_options_file(const JavaVMInitArgs* args,
417 const char* vm_options_file,
418 const int vm_options_file_pos,
419 ScopedVMInitArgs* vm_options_file_args,
420 ScopedVMInitArgs* args_out);
421 static bool args_contains_vm_options_file_arg(const JavaVMInitArgs* args);
422 static jint expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
423 ScopedVMInitArgs* mod_args,
424 JavaVMInitArgs** args_out);
425 static jint match_special_option_and_act(const JavaVMInitArgs* args,
426 ScopedVMInitArgs* args_out);
427
428 static bool handle_deprecated_print_gc_flags();
429
430 static jint parse_vm_init_args(const JavaVMInitArgs *vm_options_args,
431 const JavaVMInitArgs *java_tool_options_args,
432 const JavaVMInitArgs *java_options_args,
433 const JavaVMInitArgs *cmd_line_args);
434 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, JVMFlagOrigin origin);
435 static jint finalize_vm_init_args(bool patch_mod_javabase);
436 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type);
437
438 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) {
439 return is_bad_option(option, ignore, NULL);
440 }
441
442 static void describe_range_error(ArgsRange errcode);
443 static ArgsRange check_memory_size(julong size, julong min_size, julong max_size);
444 static ArgsRange parse_memory_size(const char* s, julong* long_arg,
445 julong min_size, julong max_size = max_uintx);
446
447 // methods to build strings from individual args
448 static void build_jvm_args(const char* arg);
449 static void build_jvm_flags(const char* arg);
450 static void add_string(char*** bldarray, int* count, const char* arg);
451 static const char* build_resource_string(char** args, int count);
452
453 // Returns true if the flag is obsolete (and not yet expired).
454 // In this case the 'version' buffer is filled in with
455 // the version number when the flag became obsolete.
456 static bool is_obsolete_flag(const char* flag_name, JDK_Version* version);
457
458 // Returns 1 if the flag is deprecated (and not yet obsolete or expired).
459 // In this case the 'version' buffer is filled in with the version number when
460 // the flag became deprecated.
461 // Returns -1 if the flag is expired or obsolete.
462 // Returns 0 otherwise.
463 static int is_deprecated_flag(const char* flag_name, JDK_Version* version);
464
465 // Return the real name for the flag passed on the command line (either an alias name or "flag_name").
466 static const char* real_flag_name(const char *flag_name);
467 static JVMFlag* find_jvm_flag(const char* name, size_t name_length);
468
469 // Return the "real" name for option arg if arg is an alias, and print a warning if arg is deprecated.
470 // Return NULL if the arg has expired.
471 static const char* handle_aliases_and_deprecation(const char* arg);
472
473 static char* SharedArchivePath;
474 static char* SharedDynamicArchivePath;
475 static size_t _default_SharedBaseAddress; // The default value specified in globals.hpp
476 static void extract_shared_archive_paths(const char* archive_path,
477 char** base_archive_path,
478 char** top_archive_path) NOT_CDS_RETURN;
479
480 // Helpers for parse_malloc_limits
481 static bool parse_malloc_limit_size(const char* s, size_t* out);
482 static void parse_single_category_limit(char* expression, size_t limits[mt_number_of_types]);
483
484 public:
485 static int num_archives(const char* archive_path) NOT_CDS_RETURN_(0);
486 // Parses the arguments, first phase
487 static jint parse(const JavaVMInitArgs* args);
488 // Parse a string for a unsigned integer. Returns true if value
489 // is an unsigned integer greater than or equal to the minimum
490 // parameter passed and returns the value in uintx_arg. Returns
491 // false otherwise, with uintx_arg undefined.
492 static bool parse_uintx(const char* value, uintx* uintx_arg,
493 uintx min_size);
494 // Apply ergonomics
495 static jint apply_ergo();
496 // Adjusts the arguments after the OS have adjusted the arguments
497 static jint adjust_after_os();
498
499 // Check consistency or otherwise of VM argument settings
500 static bool check_vm_args_consistency();
501 // Used by os_solaris
502 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized);
503
504 static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; }
505 // Return the maximum size a heap with compressed oops can take
506 static size_t max_heap_for_compressed_oops();
507
508 // return a char* array containing all options
509 static char** jvm_flags_array() { return _jvm_flags_array; }
510 static char** jvm_args_array() { return _jvm_args_array; }
511 static int num_jvm_flags() { return _num_jvm_flags; }
512 static int num_jvm_args() { return _num_jvm_args; }
513 // return the arguments passed to the Java application
514 static const char* java_command() { return _java_command; }
515
516 // print jvm_flags, jvm_args and java_command
517 static void print_on(outputStream* st);
518 static void print_summary_on(outputStream* st);
519
520 // convenient methods to get and set jvm_flags_file
521 static const char* get_jvm_flags_file() { return _jvm_flags_file; }
522 static void set_jvm_flags_file(const char *value) {
523 if (_jvm_flags_file != NULL) {
524 os::free(_jvm_flags_file);
525 }
526 _jvm_flags_file = os::strdup_check_oom(value);
527 }
528 // convenient methods to obtain / print jvm_flags and jvm_args
529 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); }
530 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); }
531 static void print_jvm_flags_on(outputStream* st);
532 static void print_jvm_args_on(outputStream* st);
533
534 // -Dkey=value flags
535 static SystemProperty* system_properties() { return _system_properties; }
536 static const char* get_property(const char* key);
537
538 // -Djava.vendor.url.bug
539 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; }
540
541 // -Dsun.java.launcher
542 static const char* sun_java_launcher() { return _sun_java_launcher; }
543 // Was VM created by a Java launcher?
544 static bool created_by_java_launcher();
545 // -Dsun.java.launcher.is_altjvm
546 static bool sun_java_launcher_is_altjvm();
547
548 // -Xrun
549 static AgentLibrary* libraries() { return _libraryList.first(); }
550 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); }
551 static void convert_library_to_agent(AgentLibrary* lib)
552 { _libraryList.remove(lib);
553 _agentList.add(lib); }
554
555 // -agentlib -agentpath
556 static AgentLibrary* agents() { return _agentList.first(); }
557 static bool init_agents_at_startup() { return !_agentList.is_empty(); }
558
559 // abort, exit, vfprintf hooks
560 static abort_hook_t abort_hook() { return _abort_hook; }
561 static exit_hook_t exit_hook() { return _exit_hook; }
562 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; }
563
564 static const char* GetSharedArchivePath() { return SharedArchivePath; }
565 static const char* GetSharedDynamicArchivePath() { return SharedDynamicArchivePath; }
566 static size_t default_SharedBaseAddress() { return _default_SharedBaseAddress; }
567 // Java launcher properties
568 static void process_sun_java_launcher_properties(JavaVMInitArgs* args);
569
570 // System properties
571 static void init_system_properties();
572
573 // Update/Initialize System properties after JDK version number is known
574 static void init_version_specific_system_properties();
575
576 // Update VM info property - called after argument parsing
577 static void update_vm_info_property(const char* vm_info) {
578 _vm_info->set_value(vm_info);
579 }
580
581 // Property List manipulation
582 static void PropertyList_add(SystemProperty *element);
583 static void PropertyList_add(SystemProperty** plist, SystemProperty *element);
584 static void PropertyList_add(SystemProperty** plist, const char* k, const char* v, bool writeable, bool internal);
585
586 static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
587 PropertyAppendable append, PropertyWriteable writeable,
588 PropertyInternal internal);
589 static const char* PropertyList_get_value(SystemProperty* plist, const char* key);
590 static const char* PropertyList_get_readable_value(SystemProperty* plist, const char* key);
591 static int PropertyList_count(SystemProperty* pl);
592 static int PropertyList_readable_count(SystemProperty* pl);
593
594 static bool is_internal_module_property(const char* option);
595
596 // Miscellaneous System property value getter and setters.
597 static void set_dll_dir(const char *value) { _sun_boot_library_path->set_value(value); }
598 static void set_java_home(const char *value) { _java_home->set_value(value); }
599 static void set_library_path(const char *value) { _java_library_path->set_value(value); }
600 static void set_ext_dirs(char *value) { _ext_dirs = os::strdup_check_oom(value); }
601
602 // Set up the underlying pieces of the boot class path
603 static void add_patch_mod_prefix(const char *module_name, const char *path, bool* patch_mod_javabase);
604 static void set_boot_class_path(const char *value, bool has_jimage) {
605 // During start up, set by os::set_boot_path()
606 assert(get_boot_class_path() == NULL, "Boot class path previously set");
607 _boot_class_path->set_value(value);
608 _has_jimage = has_jimage;
609 }
610 static void append_sysclasspath(const char *value) {
611 _boot_class_path->append_value(value);
612 _jdk_boot_class_path_append->append_value(value);
613 }
614
615 static GrowableArray<ModulePatchPath*>* get_patch_mod_prefix() { return _patch_mod_prefix; }
616 static char* get_boot_class_path() { return _boot_class_path->value(); }
617 static bool has_jimage() { return _has_jimage; }
618
619 static char* get_java_home() { return _java_home->value(); }
620 static char* get_dll_dir() { return _sun_boot_library_path->value(); }
621 static char* get_appclasspath() { return _java_class_path->value(); }
622 static void fix_appclasspath();
623
624 static char* get_default_shared_archive_path() NOT_CDS_RETURN_(NULL);
625 static void init_shared_archive_paths() NOT_CDS_RETURN;
626
627 // Operation modi
628 static Mode mode() { return _mode; }
629 static bool is_interpreter_only() { return mode() == _int; }
630 static bool is_compiler_only() { return mode() == _comp; }
631
632
633 // preview features
634 static void set_enable_preview() { _enable_preview = true; }
635 static bool enable_preview() { return _enable_preview; }
636
637 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid.
638 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen);
639
640 static void check_unsupported_dumping_properties() NOT_CDS_RETURN;
641
642 static bool check_unsupported_cds_runtime_properties() NOT_CDS_RETURN0;
643
644 static bool atojulong(const char *s, julong* result);
645
646 static bool has_jfr_option() NOT_JFR_RETURN_(false);
647
648 static bool is_dumping_archive() { return DumpSharedSpaces || DynamicDumpSharedSpaces; }
649
650 static void assert_is_dumping_archive() {
651 assert(Arguments::is_dumping_archive(), "dump time only");
652 }
653
654 // Parse diagnostic NMT switch "MallocLimit" and return the found limits.
655 // 1) If option is not given, it will set all limits to 0 (aka "no limit").
656 // 2) If option is given in the global form (-XX:MallocLimit=<size>), it
657 // will return the size in *total_limit.
658 // 3) If option is given in its per-NMT-category form (-XX:MallocLimit=<category>:<size>[,<category>:<size>]),
659 // it will return all found limits in the limits array.
660 // 4) If option is malformed, it will exit the VM.
661 // For (2) and (3), limits not affected by the switch will be set to 0.
662 static void parse_malloc_limits(size_t* total_limit, size_t limits[mt_number_of_types]);
663
664 DEBUG_ONLY(static bool verify_special_jvm_flags(bool check_globals);)
665 };
666
667 // Disable options not supported in this release, with a warning if they
668 // were explicitly requested on the command-line
669 #define UNSUPPORTED_OPTION(opt) \
670 do { \
671 if (opt) { \
672 if (FLAG_IS_CMDLINE(opt)) { \
673 warning("-XX:+" #opt " not supported in this VM"); \
674 } \
675 FLAG_SET_DEFAULT(opt, false); \
676 } \
677 } while(0)
678
679 // similar to UNSUPPORTED_OPTION but sets flag to NULL
680 #define UNSUPPORTED_OPTION_NULL(opt) \
681 do { \
682 if (opt) { \
683 if (FLAG_IS_CMDLINE(opt)) { \
684 warning("-XX flag " #opt " not supported in this VM"); \
685 } \
686 FLAG_SET_DEFAULT(opt, NULL); \
687 } \
688 } while(0)
689
690 // Initialize options not supported in this release, with a warning
691 // if they were explicitly requested on the command-line
692 #define UNSUPPORTED_OPTION_INIT(opt, value) \
693 do { \
694 if (FLAG_IS_CMDLINE(opt)) { \
695 warning("-XX flag " #opt " not supported in this VM"); \
696 } \
697 FLAG_SET_DEFAULT(opt, value); \
698 } while(0)
699
700 #endif // SHARE_RUNTIME_ARGUMENTS_HPP