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 inline void append_path(const char* path) { _path->append_value(path); }
92 };
93
94 // Element describing System and User (-Dkey=value flags) defined property.
95 //
96 // An internal SystemProperty is one that has been removed in
97 // jdk.internal.VM.saveAndRemoveProperties, like jdk.boot.class.path.append.
98 //
99 class SystemProperty : public PathString {
100 private:
101 char* _key;
102 SystemProperty* _next;
103 bool _internal;
104 bool _writeable;
105
106 public:
107 // Accessors
108 char* value() const { return PathString::value(); }
109 const char* key() const { return _key; }
110 bool internal() const { return _internal; }
111 SystemProperty* next() const { return _next; }
112 void set_next(SystemProperty* next) { _next = next; }
113 bool writeable() const { return _writeable; }
114
115 bool readable() const {
116 return !_internal || (strcmp(_key, "jdk.boot.class.path.append") == 0 &&
117 value() != NULL);
118 }
119
120 // A system property should only have its value set
121 // via an external interface if it is a writeable property.
122 // The internal, non-writeable property jdk.boot.class.path.append
123 // is the only exception to this rule. It can be set externally
124 // via -Xbootclasspath/a or JVMTI OnLoad phase call to AddToBootstrapClassLoaderSearch.
125 // In those cases for jdk.boot.class.path.append, the base class
126 // set_value and append_value methods are called directly.
127 void set_writeable_value(const char *value) {
128 if (writeable()) {
129 set_value(value);
130 }
131 }
132 void append_writeable_value(const char *value) {
133 if (writeable()) {
134 append_value(value);
135 }
136 }
137
138 // Constructor
139 SystemProperty(const char* key, const char* value, bool writeable, bool internal = false);
140 };
141
142
143 // For use by -agentlib, -agentpath and -Xrun
144 class AgentLibrary : public CHeapObj<mtArguments> {
145 friend class AgentLibraryList;
146 public:
147 // Is this library valid or not. Don't rely on os_lib == NULL as statically
148 // linked lib could have handle of RTLD_DEFAULT which == 0 on some platforms
149 enum AgentState {
150 agent_invalid = 0,
151 agent_valid = 1
152 };
153
154 private:
155 char* _name;
156 char* _options;
157 void* _os_lib;
158 bool _is_absolute_path;
159 bool _is_static_lib;
160 bool _is_instrument_lib;
161 AgentState _state;
162 AgentLibrary* _next;
163
164 public:
165 // Accessors
166 const char* name() const { return _name; }
167 char* options() const { return _options; }
168 bool is_absolute_path() const { return _is_absolute_path; }
169 void* os_lib() const { return _os_lib; }
170 void set_os_lib(void* os_lib) { _os_lib = os_lib; }
171 AgentLibrary* next() const { return _next; }
172 bool is_static_lib() const { return _is_static_lib; }
173 bool is_instrument_lib() const { return _is_instrument_lib; }
174 void set_static_lib(bool is_static_lib) { _is_static_lib = is_static_lib; }
175 bool valid() { return (_state == agent_valid); }
176 void set_valid() { _state = agent_valid; }
177
178 // Constructor
179 AgentLibrary(const char* name, const char* options, bool is_absolute_path,
180 void* os_lib, bool instrument_lib=false);
181 };
182
183 // maintain an order of entry list of AgentLibrary
184 class AgentLibraryList {
185 private:
186 AgentLibrary* _first;
187 AgentLibrary* _last;
188 public:
189 bool is_empty() const { return _first == NULL; }
190 AgentLibrary* first() const { return _first; }
191
192 // add to the end of the list
193 void add(AgentLibrary* lib) {
194 if (is_empty()) {
195 _first = _last = lib;
196 } else {
197 _last->_next = lib;
198 _last = lib;
199 }
200 lib->_next = NULL;
201 }
202
203 // search for and remove a library known to be in the list
204 void remove(AgentLibrary* lib) {
205 AgentLibrary* curr;
206 AgentLibrary* prev = NULL;
207 for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) {
208 if (curr == lib) {
209 break;
210 }
211 }
212 assert(curr != NULL, "always should be found");
213
214 if (curr != NULL) {
215 // it was found, by-pass this library
216 if (prev == NULL) {
217 _first = curr->_next;
218 } else {
219 prev->_next = curr->_next;
220 }
221 if (curr == _last) {
222 _last = prev;
223 }
224 curr->_next = NULL;
225 }
226 }
227
228 AgentLibraryList() {
229 _first = NULL;
230 _last = NULL;
231 }
232 };
233
234 // Helper class for controlling the lifetime of JavaVMInitArgs objects.
235 class ScopedVMInitArgs;
236
237 class Arguments : AllStatic {
238 friend class VMStructs;
239 friend class JvmtiExport;
240 friend class CodeCacheExtensions;
241 friend class ArgumentsTest;
242 friend class LargeOptionsTest;
243 public:
244 // Operation modi
245 enum Mode {
246 _int, // corresponds to -Xint
247 _mixed, // corresponds to -Xmixed
248 _comp // corresponds to -Xcomp
249 };
250
251 enum ArgsRange {
252 arg_unreadable = -3,
253 arg_too_small = -2,
254 arg_too_big = -1,
255 arg_in_range = 0
256 };
257
258 enum PropertyAppendable {
259 AppendProperty,
260 AddProperty
261 };
262
263 enum PropertyWriteable {
264 WriteableProperty,
265 UnwriteableProperty
266 };
267
268 enum PropertyInternal {
269 InternalProperty,
270 ExternalProperty
271 };
272
273 private:
274
275 // a pointer to the flags file name if it is specified
276 static char* _jvm_flags_file;
277 // an array containing all flags specified in the .hotspotrc file
278 static char** _jvm_flags_array;
279 static int _num_jvm_flags;
280 // an array containing all jvm arguments specified in the command line
281 static char** _jvm_args_array;
282 static int _num_jvm_args;
283 // string containing all java command (class/jarfile name and app args)
284 static char* _java_command;
285
286 // Property list
287 static SystemProperty* _system_properties;
288
289 // Quick accessor to System properties in the list:
290 static SystemProperty *_sun_boot_library_path;
291 static SystemProperty *_java_library_path;
292 static SystemProperty *_java_home;
293 static SystemProperty *_java_class_path;
294 static SystemProperty *_jdk_boot_class_path_append;
295 static SystemProperty *_vm_info;
296
297 // --patch-module=module=<file>(<pathsep><file>)*
298 // Each element contains the associated module name, path
299 // string pair as specified to --patch-module.
300 static GrowableArray<ModulePatchPath*>* _patch_mod_prefix;
301
302 // The constructed value of the system class path after
303 // argument processing and JVMTI OnLoad additions via
304 // calls to AddToBootstrapClassLoaderSearch. This is the
305 // final form before ClassLoader::setup_bootstrap_search().
306 // Note: since --patch-module is a module name/path pair, the
307 // boot class path string no longer contains the "prefix"
308 // to the boot class path base piece as it did when
309 // -Xbootclasspath/p was supported.
310 static PathString* _boot_class_path;
311
312 // Set if a modular java runtime image is present vs. a build with exploded modules
313 static bool _has_jimage;
314
315 // temporary: to emit warning if the default ext dirs are not empty.
316 // remove this variable when the warning is no longer needed.
317 static char* _ext_dirs;
318
319 // java.vendor.url.bug, bug reporting URL for fatal errors.
320 static const char* _java_vendor_url_bug;
321
322 // sun.java.launcher, private property to provide information about
323 // java launcher
324 static const char* _sun_java_launcher;
325
326 // was this VM created via the -XXaltjvm=<path> option
327 static bool _sun_java_launcher_is_altjvm;
328
329 // for legacy gc options (-verbose:gc and -Xloggc:)
330 static LegacyGCLogging _legacyGCLogging;
331
332 // Value of the conservative maximum heap alignment needed
333 static size_t _conservative_max_heap_alignment;
334
335 // -Xrun arguments
336 static AgentLibraryList _libraryList;
337 static void add_init_library(const char* name, char* options);
338
339 // -agentlib and -agentpath arguments
340 static AgentLibraryList _agentList;
341 static void add_init_agent(const char* name, char* options, bool absolute_path);
342 static void add_instrument_agent(const char* name, char* options, bool absolute_path);
343
344 // Late-binding agents not started via arguments
345 static void add_loaded_agent(AgentLibrary *agentLib);
346
347 // Operation modi
348 static Mode _mode;
349 static void set_mode_flags(Mode mode);
350 static bool _java_compiler;
351 static void set_java_compiler(bool arg) { _java_compiler = arg; }
352 static bool java_compiler() { return _java_compiler; }
353
354 // -Xdebug flag
355 static bool _xdebug_mode;
356 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; }
357 static bool xdebug_mode() { return _xdebug_mode; }
358
359 // preview features
360 static bool _enable_preview;
361
362 // Used to save default settings
363 static bool _AlwaysCompileLoopMethods;
364 static bool _UseOnStackReplacement;
365 static bool _BackgroundCompilation;
366 static bool _ClipInlining;
367
368 // GC ergonomics
369 static void set_conservative_max_heap_alignment();
370 static void set_use_compressed_oops();
371 static void set_use_compressed_klass_ptrs();
372 static jint set_ergonomics_flags();
373 static void set_shared_spaces_flags_and_archive_paths();
374 // Limits the given heap size by the maximum amount of virtual
375 // memory this process is currently allowed to use. It also takes
376 // the virtual-to-physical ratio of the current GC into account.
377 static size_t limit_heap_by_allocatable_memory(size_t size);
378 // Setup heap size
379 static void set_heap_size();
380
381 // Bytecode rewriting
382 static void set_bytecode_flags();
383
384 // Invocation API hooks
385 static abort_hook_t _abort_hook;
386 static exit_hook_t _exit_hook;
387 static vfprintf_hook_t _vfprintf_hook;
388
389 // System properties
390 static bool add_property(const char* prop, PropertyWriteable writeable=WriteableProperty,
391 PropertyInternal internal=ExternalProperty);
392
393 // Used for module system related properties: converted from command-line flags.
394 // Basic properties are writeable as they operate as "last one wins" and will get overwritten.
395 // Numbered properties are never writeable, and always internal.
396 static bool create_module_property(const char* prop_name, const char* prop_value, PropertyInternal internal);
397 static bool create_numbered_module_property(const char* prop_base_name, const char* prop_value, unsigned int count);
398
399 static int process_patch_mod_option(const char* patch_mod_tail);
400
401 // Aggressive optimization flags.
402 static jint set_aggressive_opts_flags();
403
404 static jint set_aggressive_heap_flags();
405
406 // Argument parsing
407 static bool parse_argument(const char* arg, JVMFlagOrigin origin);
408 static bool process_argument(const char* arg, jboolean ignore_unrecognized, JVMFlagOrigin origin);
409 static void process_java_launcher_argument(const char*, void*);
410 static void process_java_compiler_argument(const char* arg);
411 static jint parse_options_environment_variable(const char* name, ScopedVMInitArgs* vm_args);
412 static jint parse_java_tool_options_environment_variable(ScopedVMInitArgs* vm_args);
413 static jint parse_java_options_environment_variable(ScopedVMInitArgs* vm_args);
414 static jint parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args);
415 static jint parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args);
416 static jint parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize);
417 static jint insert_vm_options_file(const JavaVMInitArgs* args,
418 const char* vm_options_file,
419 const int vm_options_file_pos,
420 ScopedVMInitArgs* vm_options_file_args,
421 ScopedVMInitArgs* args_out);
422 static bool args_contains_vm_options_file_arg(const JavaVMInitArgs* args);
423 static jint expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
424 ScopedVMInitArgs* mod_args,
425 JavaVMInitArgs** args_out);
426 static jint match_special_option_and_act(const JavaVMInitArgs* args,
427 ScopedVMInitArgs* args_out);
428
429 static bool handle_deprecated_print_gc_flags();
430
431 static jint parse_vm_init_args(const JavaVMInitArgs *vm_options_args,
432 const JavaVMInitArgs *java_tool_options_args,
433 const JavaVMInitArgs *java_options_args,
434 const JavaVMInitArgs *cmd_line_args);
435 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, JVMFlagOrigin origin);
436 static jint finalize_vm_init_args();
437 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type);
438
439 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) {
440 return is_bad_option(option, ignore, NULL);
441 }
442
443 static void describe_range_error(ArgsRange errcode);
444 static ArgsRange check_memory_size(julong size, julong min_size, julong max_size);
445 static ArgsRange parse_memory_size(const char* s, julong* long_arg,
446 julong min_size, julong max_size = max_uintx);
447
448 // methods to build strings from individual args
449 static void build_jvm_args(const char* arg);
450 static void build_jvm_flags(const char* arg);
451 static void add_string(char*** bldarray, int* count, const char* arg);
452 static const char* build_resource_string(char** args, int count);
453
454 // Returns true if the flag is obsolete (and not yet expired).
455 // In this case the 'version' buffer is filled in with
456 // the version number when the flag became obsolete.
457 static bool is_obsolete_flag(const char* flag_name, JDK_Version* version);
458
459 // Returns 1 if the flag is deprecated (and not yet obsolete or expired).
460 // In this case the 'version' buffer is filled in with the version number when
461 // the flag became deprecated.
462 // Returns -1 if the flag is expired or obsolete.
463 // Returns 0 otherwise.
464 static int is_deprecated_flag(const char* flag_name, JDK_Version* version);
465
466 // Return the real name for the flag passed on the command line (either an alias name or "flag_name").
467 static const char* real_flag_name(const char *flag_name);
468 static JVMFlag* find_jvm_flag(const char* name, size_t name_length);
469
470 // Return the "real" name for option arg if arg is an alias, and print a warning if arg is deprecated.
471 // Return NULL if the arg has expired.
472 static const char* handle_aliases_and_deprecation(const char* arg);
473
474 static char* SharedArchivePath;
475 static char* SharedDynamicArchivePath;
476 static size_t _default_SharedBaseAddress; // The default value specified in globals.hpp
477 static void extract_shared_archive_paths(const char* archive_path,
478 char** base_archive_path,
479 char** top_archive_path) NOT_CDS_RETURN;
480
481 // Helpers for parse_malloc_limits
482 static bool parse_malloc_limit_size(const char* s, size_t* out);
483 static void parse_single_category_limit(char* expression, size_t limits[mt_number_of_types]);
484
485 public:
486 static int num_archives(const char* archive_path) NOT_CDS_RETURN_(0);
487 // Parses the arguments, first phase
488 static jint parse(const JavaVMInitArgs* args);
489 // Parse a string for a unsigned integer. Returns true if value
490 // is an unsigned integer greater than or equal to the minimum
491 // parameter passed and returns the value in uintx_arg. Returns
492 // false otherwise, with uintx_arg undefined.
493 static bool parse_uintx(const char* value, uintx* uintx_arg,
494 uintx min_size);
495 // Apply ergonomics
496 static jint apply_ergo();
497 // Adjusts the arguments after the OS have adjusted the arguments
498 static jint adjust_after_os();
499
500 // Check consistency or otherwise of VM argument settings
501 static bool check_vm_args_consistency();
502 // Used by os_solaris
503 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized);
504
505 static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; }
506 // Return the maximum size a heap with compressed oops can take
507 static size_t max_heap_for_compressed_oops();
508
509 // return a char* array containing all options
510 static char** jvm_flags_array() { return _jvm_flags_array; }
511 static char** jvm_args_array() { return _jvm_args_array; }
512 static int num_jvm_flags() { return _num_jvm_flags; }
513 static int num_jvm_args() { return _num_jvm_args; }
514 // return the arguments passed to the Java application
515 static const char* java_command() { return _java_command; }
516
517 // print jvm_flags, jvm_args and java_command
518 static void print_on(outputStream* st);
519 static void print_summary_on(outputStream* st);
520
521 // convenient methods to get and set jvm_flags_file
522 static const char* get_jvm_flags_file() { return _jvm_flags_file; }
523 static void set_jvm_flags_file(const char *value) {
524 if (_jvm_flags_file != NULL) {
525 os::free(_jvm_flags_file);
526 }
527 _jvm_flags_file = os::strdup_check_oom(value);
528 }
529 // convenient methods to obtain / print jvm_flags and jvm_args
530 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); }
531 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); }
532 static void print_jvm_flags_on(outputStream* st);
533 static void print_jvm_args_on(outputStream* st);
534
535 // -Dkey=value flags
536 static SystemProperty* system_properties() { return _system_properties; }
537 static const char* get_property(const char* key);
538
539 // -Djava.vendor.url.bug
540 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; }
541
542 // -Dsun.java.launcher
543 static const char* sun_java_launcher() { return _sun_java_launcher; }
544 // Was VM created by a Java launcher?
545 static bool created_by_java_launcher();
546 // -Dsun.java.launcher.is_altjvm
547 static bool sun_java_launcher_is_altjvm();
548
549 // -Xrun
550 static AgentLibrary* libraries() { return _libraryList.first(); }
551 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); }
552 static void convert_library_to_agent(AgentLibrary* lib)
553 { _libraryList.remove(lib);
554 _agentList.add(lib); }
555
556 // -agentlib -agentpath
557 static AgentLibrary* agents() { return _agentList.first(); }
558 static bool init_agents_at_startup() { return !_agentList.is_empty(); }
559
560 // abort, exit, vfprintf hooks
561 static abort_hook_t abort_hook() { return _abort_hook; }
562 static exit_hook_t exit_hook() { return _exit_hook; }
563 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; }
564
565 static const char* GetSharedArchivePath() { return SharedArchivePath; }
566 static const char* GetSharedDynamicArchivePath() { return SharedDynamicArchivePath; }
567 static size_t default_SharedBaseAddress() { return _default_SharedBaseAddress; }
568 // Java launcher properties
569 static void process_sun_java_launcher_properties(JavaVMInitArgs* args);
570
571 // System properties
572 static void init_system_properties();
573
574 // Update/Initialize System properties after JDK version number is known
575 static void init_version_specific_system_properties();
576
577 // Update VM info property - called after argument parsing
578 static void update_vm_info_property(const char* vm_info) {
579 _vm_info->set_value(vm_info);
580 }
581
582 // Property List manipulation
583 static void PropertyList_add(SystemProperty *element);
584 static void PropertyList_add(SystemProperty** plist, SystemProperty *element);
585 static void PropertyList_add(SystemProperty** plist, const char* k, const char* v, bool writeable, bool internal);
586
587 static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
588 PropertyAppendable append, PropertyWriteable writeable,
589 PropertyInternal internal);
590 static const char* PropertyList_get_value(SystemProperty* plist, const char* key);
591 static const char* PropertyList_get_readable_value(SystemProperty* plist, const char* key);
592 static int PropertyList_count(SystemProperty* pl);
593 static int PropertyList_readable_count(SystemProperty* pl);
594
595 static bool is_internal_module_property(const char* option);
596
597 // Miscellaneous System property value getter and setters.
598 static void set_dll_dir(const char *value) { _sun_boot_library_path->set_value(value); }
599 static void set_java_home(const char *value) { _java_home->set_value(value); }
600 static void set_library_path(const char *value) { _java_library_path->set_value(value); }
601 static void set_ext_dirs(char *value) { _ext_dirs = os::strdup_check_oom(value); }
602
603 // Set up the underlying pieces of the boot class path
604 static void add_patch_mod_prefix(const char *module_name, const char *path, bool allow_append);
605 static bool patch_mod_javabase();
606 static int finalize_patch_module();
607 static void set_boot_class_path(const char *value, bool has_jimage) {
608 // During start up, set by os::set_boot_path()
609 assert(get_boot_class_path() == NULL, "Boot class path previously set");
610 _boot_class_path->set_value(value);
611 _has_jimage = has_jimage;
612 }
613 static void append_sysclasspath(const char *value) {
614 _boot_class_path->append_value(value);
615 _jdk_boot_class_path_append->append_value(value);
616 }
617
618 static GrowableArray<ModulePatchPath*>* get_patch_mod_prefix() { return _patch_mod_prefix; }
619 static char* get_boot_class_path() { return _boot_class_path->value(); }
620 static bool has_jimage() { return _has_jimage; }
621
622 static char* get_java_home() { return _java_home->value(); }
623 static char* get_dll_dir() { return _sun_boot_library_path->value(); }
624 static char* get_appclasspath() { return _java_class_path->value(); }
625 static void fix_appclasspath();
626
627 static char* get_default_shared_archive_path() NOT_CDS_RETURN_(NULL);
628 static void init_shared_archive_paths() NOT_CDS_RETURN;
629
630 // Operation modi
631 static Mode mode() { return _mode; }
632 static bool is_interpreter_only() { return mode() == _int; }
633 static bool is_compiler_only() { return mode() == _comp; }
634
635
636 // preview features
637 static void set_enable_preview() { _enable_preview = true; }
638 static bool enable_preview() { return _enable_preview; }
639
640 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid.
641 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen);
642
643 static void check_unsupported_dumping_properties() NOT_CDS_RETURN;
644
645 static bool check_unsupported_cds_runtime_properties() NOT_CDS_RETURN0;
646
647 static bool atojulong(const char *s, julong* result);
648
649 static bool has_jfr_option() NOT_JFR_RETURN_(false);
650
651 static bool is_dumping_archive() { return DumpSharedSpaces || DynamicDumpSharedSpaces; }
652
653 static void assert_is_dumping_archive() {
654 assert(Arguments::is_dumping_archive(), "dump time only");
655 }
656
657 // Parse diagnostic NMT switch "MallocLimit" and return the found limits.
658 // 1) If option is not given, it will set all limits to 0 (aka "no limit").
659 // 2) If option is given in the global form (-XX:MallocLimit=<size>), it
660 // will return the size in *total_limit.
661 // 3) If option is given in its per-NMT-category form (-XX:MallocLimit=<category>:<size>[,<category>:<size>]),
662 // it will return all found limits in the limits array.
663 // 4) If option is malformed, it will exit the VM.
664 // For (2) and (3), limits not affected by the switch will be set to 0.
665 static void parse_malloc_limits(size_t* total_limit, size_t limits[mt_number_of_types]);
666
667 DEBUG_ONLY(static bool verify_special_jvm_flags(bool check_globals);)
668 };
669
670 // Disable options not supported in this release, with a warning if they
671 // were explicitly requested on the command-line
672 #define UNSUPPORTED_OPTION(opt) \
673 do { \
674 if (opt) { \
675 if (FLAG_IS_CMDLINE(opt)) { \
676 warning("-XX:+" #opt " not supported in this VM"); \
677 } \
678 FLAG_SET_DEFAULT(opt, false); \
679 } \
680 } while(0)
681
682 // similar to UNSUPPORTED_OPTION but sets flag to NULL
683 #define UNSUPPORTED_OPTION_NULL(opt) \
684 do { \
685 if (opt) { \
686 if (FLAG_IS_CMDLINE(opt)) { \
687 warning("-XX flag " #opt " not supported in this VM"); \
688 } \
689 FLAG_SET_DEFAULT(opt, NULL); \
690 } \
691 } while(0)
692
693 // Initialize options not supported in this release, with a warning
694 // if they were explicitly requested on the command-line
695 #define UNSUPPORTED_OPTION_INIT(opt, value) \
696 do { \
697 if (FLAG_IS_CMDLINE(opt)) { \
698 warning("-XX flag " #opt " not supported in this VM"); \
699 } \
700 FLAG_SET_DEFAULT(opt, value); \
701 } while(0)
702
703 #endif // SHARE_RUNTIME_ARGUMENTS_HPP