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 size_t  _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 void PropertyList_update_value(SystemProperty* plist, const char* k, const char* v);
 655   static const char* PropertyList_get_value(SystemProperty* plist, const char* key);
 656   static const char* PropertyList_get_readable_value(SystemProperty* plist, const char* key);
 657   static int  PropertyList_count(SystemProperty* pl);
 658   static int  PropertyList_readable_count(SystemProperty* pl);
 659   static const char* PropertyList_get_key_at(SystemProperty* pl,int index);
 660   static char* PropertyList_get_value_at(SystemProperty* pl,int index);
 661 
 662   static bool is_internal_module_property(const char* option);
 663 
 664   // Miscellaneous System property value getter and setters.
 665   static void set_dll_dir(const char *value) { _sun_boot_library_path->set_value(value); }
 666   static void set_java_home(const char *value) { _java_home->set_value(value); }
 667   static void set_library_path(const char *value) { _java_library_path->set_value(value); }
 668   static void set_ext_dirs(char *value)     { _ext_dirs = os::strdup_check_oom(value); }
 669 
 670   // Set up the underlying pieces of the system boot class path
 671   static void add_patch_mod_prefix(const char *module_name, const char *path, bool* patch_mod_javabase);
 672   static void set_sysclasspath(const char *value, bool has_jimage) {
 673     // During start up, set by os::set_boot_path()
 674     assert(get_sysclasspath() == NULL, "System boot class path previously set");
 675     _system_boot_class_path->set_value(value);
 676     _has_jimage = has_jimage;
 677   }
 678   static void append_sysclasspath(const char *value) {
 679     _system_boot_class_path->append_value(value);
 680     _jdk_boot_class_path_append->append_value(value);
 681   }
 682 
 683   static GrowableArray<ModulePatchPath*>* get_patch_mod_prefix() { return _patch_mod_prefix; }
 684   static char* get_sysclasspath() { return _system_boot_class_path->value(); }
 685   static char* get_jdk_boot_class_path_append() { return _jdk_boot_class_path_append->value(); }
 686   static bool has_jimage() { return _has_jimage; }
 687 
 688   static char* get_java_home()    { return _java_home->value(); }
 689   static char* get_dll_dir()      { return _sun_boot_library_path->value(); }
 690   static char* get_ext_dirs()     { return _ext_dirs;  }
 691   static char* get_appclasspath() { return _java_class_path->value(); }
 692   static void  fix_appclasspath();
 693 
 694 
 695   // Operation modi
 696   static Mode mode()                        { return _mode; }
 697   static bool is_interpreter_only() { return mode() == _int; }
 698 
 699   // preview features
 700   static void set_enable_preview() { _enable_preview = true; }
 701   static bool enable_preview() { return _enable_preview; }
 702 
 703   // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid.
 704   static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen);
 705 
 706   static void check_unsupported_dumping_properties() NOT_CDS_RETURN;
 707 
 708   static bool check_unsupported_cds_runtime_properties() NOT_CDS_RETURN0;
 709 
 710   static bool atojulong(const char *s, julong* result);
 711 };
 712 
 713 // Disable options not supported in this release, with a warning if they
 714 // were explicitly requested on the command-line
 715 #define UNSUPPORTED_OPTION(opt)                          \
 716 do {                                                     \
 717   if (opt) {                                             \
 718     if (FLAG_IS_CMDLINE(opt)) {                          \
 719       warning("-XX:+" #opt " not supported in this VM"); \
 720     }                                                    \
 721     FLAG_SET_DEFAULT(opt, false);                        \
 722   }                                                      \
 723 } while(0)
 724 
 725 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP