1 /*
   2  * Copyright (c) 1997, 2017, 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 "runtime/java.hpp"
  31 #include "runtime/os.hpp"
  32 #include "runtime/perfData.hpp"
  33 #include "utilities/debug.hpp"
  34 
  35 // Arguments parses the command line and recognizes options
  36 
  37 // Invocation API hook typedefs (these should really be defined in jni.hpp)
  38 extern "C" {
  39   typedef void (JNICALL *abort_hook_t)(void);
  40   typedef void (JNICALL *exit_hook_t)(jint code);
  41   typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args)  ATTRIBUTE_PRINTF(2, 0);
  42 }
  43 
  44 // Obsolete or deprecated -XX flag.
  45 struct SpecialFlag {
  46   const char* name;
  47   JDK_Version deprecated_in; // When the deprecation warning started (or "undefined").
  48   JDK_Version obsolete_in;   // When the obsolete warning started (or "undefined").
  49   JDK_Version expired_in;    // When the option expires (or "undefined").
  50 };
  51 
  52 // PathString is used as:
  53 //  - the underlying value for a SystemProperty
  54 //  - the path portion of an --patch-module module/path pair
  55 //  - the string that represents the system boot class path, Arguments::_system_boot_class_path.
  56 class PathString : public CHeapObj<mtArguments> {
  57  protected:
  58   char* _value;
  59  public:
  60   char* value() const { return _value; }
  61 
  62   bool set_value(const char *value) {
  63     if (_value != NULL) {
  64       FreeHeap(_value);
  65     }
  66     _value = AllocateHeap(strlen(value)+1, mtArguments);
  67     assert(_value != NULL, "Unable to allocate space for new path value");
  68     if (_value != NULL) {
  69       strcpy(_value, value);
  70     } else {
  71       // not able to allocate
  72       return false;
  73     }
  74     return true;
  75   }
  76 
  77   void append_value(const char *value) {
  78     char *sp;
  79     size_t len = 0;
  80     if (value != NULL) {
  81       len = strlen(value);
  82       if (_value != NULL) {
  83         len += strlen(_value);
  84       }
  85       sp = AllocateHeap(len+2, mtArguments);
  86       assert(sp != NULL, "Unable to allocate space for new append path value");
  87       if (sp != NULL) {
  88         if (_value != NULL) {
  89           strcpy(sp, _value);
  90           strcat(sp, os::path_separator());
  91           strcat(sp, value);
  92           FreeHeap(_value);
  93         } else {
  94           strcpy(sp, value);
  95         }
  96         _value = sp;
  97       }
  98     }
  99   }
 100 
 101   PathString(const char* value) {
 102     if (value == NULL) {
 103       _value = NULL;
 104     } else {
 105       _value = AllocateHeap(strlen(value)+1, mtArguments);
 106       strcpy(_value, value);
 107     }
 108   }
 109 
 110   ~PathString() {
 111     if (_value != NULL) {
 112       FreeHeap(_value);
 113       _value = NULL;
 114     }
 115   }
 116 };
 117 
 118 // ModulePatchPath records the module/path pair as specified to --patch-module.
 119 class ModulePatchPath : public CHeapObj<mtInternal> {
 120 private:
 121   char* _module_name;
 122   PathString* _path;
 123 public:
 124   ModulePatchPath(const char* module_name, const char* path) {
 125     assert(module_name != NULL && path != NULL, "Invalid module name or path value");
 126     size_t len = strlen(module_name) + 1;
 127     _module_name = AllocateHeap(len, mtInternal);
 128     strncpy(_module_name, module_name, len); // copy the trailing null
 129     _path =  new PathString(path);
 130   }
 131 
 132   ~ModulePatchPath() {
 133     if (_module_name != NULL) {
 134       FreeHeap(_module_name);
 135       _module_name = NULL;
 136     }
 137     if (_path != NULL) {
 138       delete _path;
 139       _path = NULL;
 140     }
 141   }
 142 
 143   inline void set_path(const char* path) { _path->set_value(path); }
 144   inline const char* module_name() const { return _module_name; }
 145   inline char* path_string() const { return _path->value(); }
 146 };
 147 
 148 // Element describing System and User (-Dkey=value flags) defined property.
 149 //
 150 // An internal SystemProperty is one that has been removed in
 151 // jdk.internal.VM.saveAndRemoveProperties, like jdk.boot.class.path.append.
 152 //
 153 class SystemProperty : public PathString {
 154  private:
 155   char*           _key;
 156   SystemProperty* _next;
 157   bool            _internal;
 158   bool            _writeable;
 159   bool writeable() { return _writeable; }
 160 
 161  public:
 162   // Accessors
 163   char* value() const                 { return PathString::value(); }
 164   const char* key() const             { return _key; }
 165   bool internal() const               { return _internal; }
 166   SystemProperty* next() const        { return _next; }
 167   void set_next(SystemProperty* next) { _next = next; }
 168 
 169   bool is_readable() const {
 170     return !_internal || strcmp(_key, "jdk.boot.class.path.append") == 0;
 171   }
 172 
 173   // A system property should only have its value set
 174   // via an external interface if it is a writeable property.
 175   // The internal, non-writeable property jdk.boot.class.path.append
 176   // is the only exception to this rule.  It can be set externally
 177   // via -Xbootclasspath/a or JVMTI OnLoad phase call to AddToBootstrapClassLoaderSearch.
 178   // In those cases for jdk.boot.class.path.append, the base class
 179   // set_value and append_value methods are called directly.
 180   bool set_writeable_value(const char *value) {
 181     if (writeable()) {
 182       return set_value(value);
 183     }
 184     return false;
 185   }
 186 
 187   // Constructor
 188   SystemProperty(const char* key, const char* value, bool writeable, bool internal = false) : PathString(value) {
 189     if (key == NULL) {
 190       _key = NULL;
 191     } else {
 192       _key = AllocateHeap(strlen(key)+1, mtArguments);
 193       strcpy(_key, key);
 194     }
 195     _next = NULL;
 196     _internal = internal;
 197     _writeable = writeable;
 198   }
 199 };
 200 
 201 
 202 // For use by -agentlib, -agentpath and -Xrun
 203 class AgentLibrary : public CHeapObj<mtArguments> {
 204   friend class AgentLibraryList;
 205 public:
 206   // Is this library valid or not. Don't rely on os_lib == NULL as statically
 207   // linked lib could have handle of RTLD_DEFAULT which == 0 on some platforms
 208   enum AgentState {
 209     agent_invalid = 0,
 210     agent_valid   = 1
 211   };
 212 
 213  private:
 214   char*           _name;
 215   char*           _options;
 216   void*           _os_lib;
 217   bool            _is_absolute_path;
 218   bool            _is_static_lib;
 219   AgentState      _state;
 220   AgentLibrary*   _next;
 221 
 222  public:
 223   // Accessors
 224   const char* name() const                  { return _name; }
 225   char* options() const                     { return _options; }
 226   bool is_absolute_path() const             { return _is_absolute_path; }
 227   void* os_lib() const                      { return _os_lib; }
 228   void set_os_lib(void* os_lib)             { _os_lib = os_lib; }
 229   AgentLibrary* next() const                { return _next; }
 230   bool is_static_lib() const                { return _is_static_lib; }
 231   void set_static_lib(bool is_static_lib)   { _is_static_lib = is_static_lib; }
 232   bool valid()                              { return (_state == agent_valid); }
 233   void set_valid()                          { _state = agent_valid; }
 234   void set_invalid()                        { _state = agent_invalid; }
 235 
 236   // Constructor
 237   AgentLibrary(const char* name, const char* options, bool is_absolute_path, void* os_lib) {
 238     _name = AllocateHeap(strlen(name)+1, mtArguments);
 239     strcpy(_name, name);
 240     if (options == NULL) {
 241       _options = NULL;
 242     } else {
 243       _options = AllocateHeap(strlen(options)+1, mtArguments);
 244       strcpy(_options, options);
 245     }
 246     _is_absolute_path = is_absolute_path;
 247     _os_lib = os_lib;
 248     _next = NULL;
 249     _state = agent_invalid;
 250     _is_static_lib = false;
 251   }
 252 };
 253 
 254 // maintain an order of entry list of AgentLibrary
 255 class AgentLibraryList VALUE_OBJ_CLASS_SPEC {
 256  private:
 257   AgentLibrary*   _first;
 258   AgentLibrary*   _last;
 259  public:
 260   bool is_empty() const                     { return _first == NULL; }
 261   AgentLibrary* first() const               { return _first; }
 262 
 263   // add to the end of the list
 264   void add(AgentLibrary* lib) {
 265     if (is_empty()) {
 266       _first = _last = lib;
 267     } else {
 268       _last->_next = lib;
 269       _last = lib;
 270     }
 271     lib->_next = NULL;
 272   }
 273 
 274   // search for and remove a library known to be in the list
 275   void remove(AgentLibrary* lib) {
 276     AgentLibrary* curr;
 277     AgentLibrary* prev = NULL;
 278     for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) {
 279       if (curr == lib) {
 280         break;
 281       }
 282     }
 283     assert(curr != NULL, "always should be found");
 284 
 285     if (curr != NULL) {
 286       // it was found, by-pass this library
 287       if (prev == NULL) {
 288         _first = curr->_next;
 289       } else {
 290         prev->_next = curr->_next;
 291       }
 292       if (curr == _last) {
 293         _last = prev;
 294       }
 295       curr->_next = NULL;
 296     }
 297   }
 298 
 299   AgentLibraryList() {
 300     _first = NULL;
 301     _last = NULL;
 302   }
 303 };
 304 
 305 // Helper class for controlling the lifetime of JavaVMInitArgs objects.
 306 class ScopedVMInitArgs;
 307 
 308 // Most logging functions require 5 tags. Some of them may be _NO_TAG.
 309 typedef struct {
 310   const char* alias_name;
 311   LogLevelType level;
 312   bool exactMatch;
 313   LogTagType tag0;
 314   LogTagType tag1;
 315   LogTagType tag2;
 316   LogTagType tag3;
 317   LogTagType tag4;
 318   LogTagType tag5;
 319 } AliasedLoggingFlag;
 320 
 321 class Arguments : AllStatic {
 322   friend class VMStructs;
 323   friend class JvmtiExport;
 324   friend class CodeCacheExtensions;
 325  public:
 326   // Operation modi
 327   enum Mode {
 328     _int,       // corresponds to -Xint
 329     _mixed,     // corresponds to -Xmixed
 330     _comp       // corresponds to -Xcomp
 331   };
 332 
 333   enum ArgsRange {
 334     arg_unreadable = -3,
 335     arg_too_small  = -2,
 336     arg_too_big    = -1,
 337     arg_in_range   = 0
 338   };
 339 
 340   enum PropertyAppendable {
 341     AppendProperty,
 342     AddProperty
 343   };
 344 
 345   enum PropertyWriteable {
 346     WriteableProperty,
 347     UnwriteableProperty
 348   };
 349 
 350   enum PropertyInternal {
 351     InternalProperty,
 352     ExternalProperty
 353   };
 354 
 355  private:
 356 
 357   // a pointer to the flags file name if it is specified
 358   static char*  _jvm_flags_file;
 359   // an array containing all flags specified in the .hotspotrc file
 360   static char** _jvm_flags_array;
 361   static int    _num_jvm_flags;
 362   // an array containing all jvm arguments specified in the command line
 363   static char** _jvm_args_array;
 364   static int    _num_jvm_args;
 365   // string containing all java command (class/jarfile name and app args)
 366   static char* _java_command;
 367 
 368   // Property list
 369   static SystemProperty* _system_properties;
 370 
 371   // Quick accessor to System properties in the list:
 372   static SystemProperty *_sun_boot_library_path;
 373   static SystemProperty *_java_library_path;
 374   static SystemProperty *_java_home;
 375   static SystemProperty *_java_class_path;
 376   static SystemProperty *_jdk_boot_class_path_append;
 377 
 378   // --patch-module=module=<file>(<pathsep><file>)*
 379   // Each element contains the associated module name, path
 380   // string pair as specified to --patch-module.
 381   static GrowableArray<ModulePatchPath*>* _patch_mod_prefix;
 382 
 383   // The constructed value of the system class path after
 384   // argument processing and JVMTI OnLoad additions via
 385   // calls to AddToBootstrapClassLoaderSearch.  This is the
 386   // final form before ClassLoader::setup_bootstrap_search().
 387   // Note: since --patch-module is a module name/path pair, the
 388   // system boot class path string no longer contains the "prefix"
 389   // to the boot class path base piece as it did when
 390   // -Xbootclasspath/p was supported.
 391   static PathString *_system_boot_class_path;
 392 
 393   // Set if a modular java runtime image is present vs. a build with exploded modules
 394   static bool _has_jimage;
 395 
 396   // temporary: to emit warning if the default ext dirs are not empty.
 397   // remove this variable when the warning is no longer needed.
 398   static char* _ext_dirs;
 399 
 400   // java.vendor.url.bug, bug reporting URL for fatal errors.
 401   static const char* _java_vendor_url_bug;
 402 
 403   // sun.java.launcher, private property to provide information about
 404   // java launcher
 405   static const char* _sun_java_launcher;
 406 
 407   // sun.java.launcher.pid, private property
 408   static int    _sun_java_launcher_pid;
 409 
 410   // was this VM created via the -XXaltjvm=<path> option
 411   static bool   _sun_java_launcher_is_altjvm;
 412 
 413   // Option flags
 414   static bool   _has_profile;
 415   static const char*  _gc_log_filename;
 416   // Value of the conservative maximum heap alignment needed
 417   static size_t  _conservative_max_heap_alignment;
 418 
 419   static uintx  _min_heap_size;
 420 
 421   // -Xrun arguments
 422   static AgentLibraryList _libraryList;
 423   static void add_init_library(const char* name, char* options)
 424     { _libraryList.add(new AgentLibrary(name, options, false, NULL)); }
 425 
 426   // -agentlib and -agentpath arguments
 427   static AgentLibraryList _agentList;
 428   static void add_init_agent(const char* name, char* options, bool absolute_path)
 429     { _agentList.add(new AgentLibrary(name, options, absolute_path, NULL)); }
 430 
 431   // Late-binding agents not started via arguments
 432   static void add_loaded_agent(AgentLibrary *agentLib)
 433     { _agentList.add(agentLib); }
 434   static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib)
 435     { _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib)); }
 436 
 437   // Operation modi
 438   static Mode _mode;
 439   static void set_mode_flags(Mode mode);
 440   static bool _java_compiler;
 441   static void set_java_compiler(bool arg) { _java_compiler = arg; }
 442   static bool java_compiler()   { return _java_compiler; }
 443 
 444   // -Xdebug flag
 445   static bool _xdebug_mode;
 446   static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; }
 447   static bool xdebug_mode()             { return _xdebug_mode; }
 448 
 449   // Used to save default settings
 450   static bool _AlwaysCompileLoopMethods;
 451   static bool _UseOnStackReplacement;
 452   static bool _BackgroundCompilation;
 453   static bool _ClipInlining;
 454   static bool _CIDynamicCompilePriority;
 455   static intx _Tier3InvokeNotifyFreqLog;
 456   static intx _Tier4InvocationThreshold;
 457 
 458   // Tiered
 459   static void set_tiered_flags();
 460   // CMS/ParNew garbage collectors
 461   static void set_parnew_gc_flags();
 462   static void set_cms_and_parnew_gc_flags();
 463   // UseParallel[Old]GC
 464   static void set_parallel_gc_flags();
 465   // Garbage-First (UseG1GC)
 466   static void set_g1_gc_flags();
 467   // Epsilon
 468   static void set_epsilon_flags();
 469   // GC ergonomics
 470   static void set_conservative_max_heap_alignment();
 471   static void set_use_compressed_oops();
 472   static void set_use_compressed_klass_ptrs();
 473   static void select_gc();
 474   static void set_ergonomics_flags();
 475   static void set_shared_spaces_flags();
 476   // limits the given memory size by the maximum amount of memory this process is
 477   // currently allowed to allocate or reserve.
 478   static julong limit_by_allocatable_memory(julong size);
 479   // Setup heap size
 480   static void set_heap_size();
 481 
 482   // Bytecode rewriting
 483   static void set_bytecode_flags();
 484 
 485   // Invocation API hooks
 486   static abort_hook_t     _abort_hook;
 487   static exit_hook_t      _exit_hook;
 488   static vfprintf_hook_t  _vfprintf_hook;
 489 
 490   // System properties
 491   static bool add_property(const char* prop, PropertyWriteable writeable=WriteableProperty,
 492                            PropertyInternal internal=ExternalProperty);
 493 
 494   static bool create_property(const char* prop_name, const char* prop_value, PropertyInternal internal);
 495   static bool create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count);
 496 
 497   static int process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase);
 498 
 499   // Aggressive optimization flags.
 500   static jint set_aggressive_opts_flags();
 501 
 502   static jint set_aggressive_heap_flags();
 503 
 504   // Argument parsing
 505   static void do_pd_flag_adjustments();
 506   static bool parse_argument(const char* arg, Flag::Flags origin);
 507   static bool process_argument(const char* arg, jboolean ignore_unrecognized, Flag::Flags origin);
 508   static void process_java_launcher_argument(const char*, void*);
 509   static void process_java_compiler_argument(const char* arg);
 510   static jint parse_options_environment_variable(const char* name, ScopedVMInitArgs* vm_args);
 511   static jint parse_java_tool_options_environment_variable(ScopedVMInitArgs* vm_args);
 512   static jint parse_java_options_environment_variable(ScopedVMInitArgs* vm_args);
 513   static jint parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args);
 514   static jint parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args);
 515   static jint insert_vm_options_file(const JavaVMInitArgs* args,
 516                                      const char* vm_options_file,
 517                                      const int vm_options_file_pos,
 518                                      ScopedVMInitArgs* vm_options_file_args,
 519                                      ScopedVMInitArgs* args_out);
 520   static bool args_contains_vm_options_file_arg(const JavaVMInitArgs* args);
 521   static jint expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
 522                                           ScopedVMInitArgs* mod_args,
 523                                           JavaVMInitArgs** args_out);
 524   static jint match_special_option_and_act(const JavaVMInitArgs* args,
 525                                            ScopedVMInitArgs* args_out);
 526 
 527   static bool handle_deprecated_print_gc_flags();
 528 
 529   static void handle_extra_cms_flags(const char* msg);
 530 
 531   static jint parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
 532                                  const JavaVMInitArgs *java_options_args,
 533                                  const JavaVMInitArgs *cmd_line_args);
 534   static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, Flag::Flags origin);
 535   static jint finalize_vm_init_args();
 536   static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type);
 537 
 538   static bool is_bad_option(const JavaVMOption* option, jboolean ignore) {
 539     return is_bad_option(option, ignore, NULL);
 540   }
 541 
 542   static void describe_range_error(ArgsRange errcode);
 543   static ArgsRange check_memory_size(julong size, julong min_size);
 544   static ArgsRange parse_memory_size(const char* s, julong* long_arg,
 545                                      julong min_size);
 546   // Parse a string for a unsigned integer.  Returns true if value
 547   // is an unsigned integer greater than or equal to the minimum
 548   // parameter passed and returns the value in uintx_arg.  Returns
 549   // false otherwise, with uintx_arg undefined.
 550   static bool parse_uintx(const char* value, uintx* uintx_arg,
 551                           uintx min_size);
 552 
 553   // methods to build strings from individual args
 554   static void build_jvm_args(const char* arg);
 555   static void build_jvm_flags(const char* arg);
 556   static void add_string(char*** bldarray, int* count, const char* arg);
 557   static const char* build_resource_string(char** args, int count);
 558 
 559   static bool methodExists(
 560     char* className, char* methodName,
 561     int classesNum, char** classes, bool* allMethods,
 562     int methodsNum, char** methods, bool* allClasses
 563   );
 564 
 565   static void parseOnlyLine(
 566     const char* line,
 567     short* classesNum, short* classesMax, char*** classes, bool** allMethods,
 568     short* methodsNum, short* methodsMax, char*** methods, bool** allClasses
 569   );
 570 
 571   // Returns true if the flag is obsolete (and not yet expired).
 572   // In this case the 'version' buffer is filled in with
 573   // the version number when the flag became obsolete.
 574   static bool is_obsolete_flag(const char* flag_name, JDK_Version* version);
 575 
 576 #ifndef PRODUCT
 577   static const char* removed_develop_logging_flag_name(const char* name);
 578 #endif // PRODUCT
 579 
 580   // Returns 1 if the flag is deprecated (and not yet obsolete or expired).
 581   //     In this case the 'version' buffer is filled in with the version number when
 582   //     the flag became deprecated.
 583   // Returns -1 if the flag is expired or obsolete.
 584   // Returns 0 otherwise.
 585   static int is_deprecated_flag(const char* flag_name, JDK_Version* version);
 586 
 587   // Return the real name for the flag passed on the command line (either an alias name or "flag_name").
 588   static const char* real_flag_name(const char *flag_name);
 589 
 590   // Return the "real" name for option arg if arg is an alias, and print a warning if arg is deprecated.
 591   // Return NULL if the arg has expired.
 592   static const char* handle_aliases_and_deprecation(const char* arg, bool warn);
 593   static bool lookup_logging_aliases(const char* arg, char* buffer);
 594   static AliasedLoggingFlag catch_logging_aliases(const char* name, bool on);
 595   static short  CompileOnlyClassesNum;
 596   static short  CompileOnlyClassesMax;
 597   static char** CompileOnlyClasses;
 598   static bool*  CompileOnlyAllMethods;
 599 
 600   static short  CompileOnlyMethodsNum;
 601   static short  CompileOnlyMethodsMax;
 602   static char** CompileOnlyMethods;
 603   static bool*  CompileOnlyAllClasses;
 604 
 605   static short  InterpretOnlyClassesNum;
 606   static short  InterpretOnlyClassesMax;
 607   static char** InterpretOnlyClasses;
 608   static bool*  InterpretOnlyAllMethods;
 609 
 610   static bool   CheckCompileOnly;
 611 
 612   static char*  SharedArchivePath;
 613 
 614  public:
 615   // Scale compile thresholds
 616   // Returns threshold scaled with CompileThresholdScaling
 617   static intx scaled_compile_threshold(intx threshold, double scale);
 618   static intx scaled_compile_threshold(intx threshold) {
 619     return scaled_compile_threshold(threshold, CompileThresholdScaling);
 620   }
 621   // Returns freq_log scaled with CompileThresholdScaling
 622   static intx scaled_freq_log(intx freq_log, double scale);
 623   static intx scaled_freq_log(intx freq_log) {
 624     return scaled_freq_log(freq_log, CompileThresholdScaling);
 625   }
 626 
 627   // Parses the arguments, first phase
 628   static jint parse(const JavaVMInitArgs* args);
 629   // Apply ergonomics
 630   static jint apply_ergo();
 631   // Adjusts the arguments after the OS have adjusted the arguments
 632   static jint adjust_after_os();
 633 
 634   static void set_gc_specific_flags();
 635   static bool gc_selected(); // whether a gc has been selected
 636   static void select_gc_ergonomically();
 637 #if INCLUDE_JVMCI
 638   // Check consistency of jvmci vm argument settings.
 639   static bool check_jvmci_args_consistency();
 640 #endif
 641   // Check for consistency in the selection of the garbage collector.
 642   static bool check_gc_consistency();        // Check user-selected gc
 643   // Check consistency or otherwise of VM argument settings
 644   static bool check_vm_args_consistency();
 645   // Used by os_solaris
 646   static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized);
 647 
 648   static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; }
 649   // Return the maximum size a heap with compressed oops can take
 650   static size_t max_heap_for_compressed_oops();
 651 
 652   // return a char* array containing all options
 653   static char** jvm_flags_array()          { return _jvm_flags_array; }
 654   static char** jvm_args_array()           { return _jvm_args_array; }
 655   static int num_jvm_flags()               { return _num_jvm_flags; }
 656   static int num_jvm_args()                { return _num_jvm_args; }
 657   // return the arguments passed to the Java application
 658   static const char* java_command()        { return _java_command; }
 659 
 660   // print jvm_flags, jvm_args and java_command
 661   static void print_on(outputStream* st);
 662   static void print_summary_on(outputStream* st);
 663 
 664   // convenient methods to get and set jvm_flags_file
 665   static const char* get_jvm_flags_file()  { return _jvm_flags_file; }
 666   static void set_jvm_flags_file(const char *value) {
 667     if (_jvm_flags_file != NULL) {
 668       os::free(_jvm_flags_file);
 669     }
 670     _jvm_flags_file = os::strdup_check_oom(value);
 671   }
 672   // convenient methods to obtain / print jvm_flags and jvm_args
 673   static const char* jvm_flags()           { return build_resource_string(_jvm_flags_array, _num_jvm_flags); }
 674   static const char* jvm_args()            { return build_resource_string(_jvm_args_array, _num_jvm_args); }
 675   static void print_jvm_flags_on(outputStream* st);
 676   static void print_jvm_args_on(outputStream* st);
 677 
 678   // -Dkey=value flags
 679   static SystemProperty*  system_properties()   { return _system_properties; }
 680   static const char*    get_property(const char* key);
 681 
 682   // -Djava.vendor.url.bug
 683   static const char* java_vendor_url_bug()  { return _java_vendor_url_bug; }
 684 
 685   // -Dsun.java.launcher
 686   static const char* sun_java_launcher()    { return _sun_java_launcher; }
 687   // Was VM created by a Java launcher?
 688   static bool created_by_java_launcher();
 689   // -Dsun.java.launcher.is_altjvm
 690   static bool sun_java_launcher_is_altjvm();
 691   // -Dsun.java.launcher.pid
 692   static int sun_java_launcher_pid()        { return _sun_java_launcher_pid; }
 693 
 694   // -Xprof
 695   static bool has_profile()                 { return _has_profile; }
 696 
 697   // -Xms
 698   static size_t min_heap_size()             { return _min_heap_size; }
 699   static void  set_min_heap_size(size_t v)  { _min_heap_size = v;  }
 700 
 701   // -Xrun
 702   static AgentLibrary* libraries()          { return _libraryList.first(); }
 703   static bool init_libraries_at_startup()   { return !_libraryList.is_empty(); }
 704   static void convert_library_to_agent(AgentLibrary* lib)
 705                                             { _libraryList.remove(lib);
 706                                               _agentList.add(lib); }
 707 
 708   // -agentlib -agentpath
 709   static AgentLibrary* agents()             { return _agentList.first(); }
 710   static bool init_agents_at_startup()      { return !_agentList.is_empty(); }
 711 
 712   // abort, exit, vfprintf hooks
 713   static abort_hook_t    abort_hook()       { return _abort_hook; }
 714   static exit_hook_t     exit_hook()        { return _exit_hook; }
 715   static vfprintf_hook_t vfprintf_hook()    { return _vfprintf_hook; }
 716 
 717   static bool GetCheckCompileOnly ()        { return CheckCompileOnly; }
 718 
 719   static const char* GetSharedArchivePath() { return SharedArchivePath; }
 720 
 721   static bool CompileMethod(char* className, char* methodName) {
 722     return
 723       methodExists(
 724         className, methodName,
 725         CompileOnlyClassesNum, CompileOnlyClasses, CompileOnlyAllMethods,
 726         CompileOnlyMethodsNum, CompileOnlyMethods, CompileOnlyAllClasses
 727       );
 728   }
 729 
 730   // Java launcher properties
 731   static void process_sun_java_launcher_properties(JavaVMInitArgs* args);
 732 
 733   // System properties
 734   static void init_system_properties();
 735 
 736   // Update/Initialize System properties after JDK version number is known
 737   static void init_version_specific_system_properties();
 738 
 739   // Property List manipulation
 740   static void PropertyList_add(SystemProperty *element);
 741   static void PropertyList_add(SystemProperty** plist, SystemProperty *element);
 742   static void PropertyList_add(SystemProperty** plist, const char* k, const char* v, bool writeable, bool internal);
 743 
 744   static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
 745                                       PropertyAppendable append, PropertyWriteable writeable,
 746                                       PropertyInternal internal);
 747   static const char* PropertyList_get_value(SystemProperty* plist, const char* key);
 748   static const char* PropertyList_get_readable_value(SystemProperty* plist, const char* key);
 749   static int  PropertyList_count(SystemProperty* pl);
 750   static int  PropertyList_readable_count(SystemProperty* pl);
 751   static const char* PropertyList_get_key_at(SystemProperty* pl,int index);
 752   static char* PropertyList_get_value_at(SystemProperty* pl,int index);
 753 
 754   static bool is_internal_module_property(const char* option);
 755 
 756   // Miscellaneous System property value getter and setters.
 757   static void set_dll_dir(const char *value) { _sun_boot_library_path->set_value(value); }
 758   static void set_java_home(const char *value) { _java_home->set_value(value); }
 759   static void set_library_path(const char *value) { _java_library_path->set_value(value); }
 760   static void set_ext_dirs(char *value)     { _ext_dirs = os::strdup_check_oom(value); }
 761 
 762   // Set up the underlying pieces of the system boot class path
 763   static void add_patch_mod_prefix(const char *module_name, const char *path, bool* patch_mod_javabase);
 764   static void set_sysclasspath(const char *value, bool has_jimage) {
 765     // During start up, set by os::set_boot_path()
 766     assert(get_sysclasspath() == NULL, "System boot class path previously set");
 767     _system_boot_class_path->set_value(value);
 768     _has_jimage = has_jimage;
 769   }
 770   static void append_sysclasspath(const char *value) {
 771     _system_boot_class_path->append_value(value);
 772     _jdk_boot_class_path_append->append_value(value);
 773   }
 774 
 775   static GrowableArray<ModulePatchPath*>* get_patch_mod_prefix() { return _patch_mod_prefix; }
 776   static char* get_sysclasspath() { return _system_boot_class_path->value(); }
 777   static char* get_jdk_boot_class_path_append() { return _jdk_boot_class_path_append->value(); }
 778   static bool has_jimage() { return _has_jimage; }
 779 
 780   static char* get_java_home()    { return _java_home->value(); }
 781   static char* get_dll_dir()      { return _sun_boot_library_path->value(); }
 782   static char* get_ext_dirs()     { return _ext_dirs;  }
 783   static char* get_appclasspath() { return _java_class_path->value(); }
 784   static void  fix_appclasspath();
 785 
 786 
 787   // Operation modi
 788   static Mode mode()                        { return _mode; }
 789   static bool is_interpreter_only() { return mode() == _int; }
 790 
 791 
 792   // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid.
 793   static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen);
 794 
 795   static void check_unsupported_dumping_properties() NOT_CDS_RETURN;
 796 
 797   static bool atojulong(const char *s, julong* result);
 798 };
 799 
 800 // Disable options not supported in this release, with a warning if they
 801 // were explicitly requested on the command-line
 802 #define UNSUPPORTED_OPTION(opt)                          \
 803 do {                                                     \
 804   if (opt) {                                             \
 805     if (FLAG_IS_CMDLINE(opt)) {                          \
 806       warning("-XX:+" #opt " not supported in this VM"); \
 807     }                                                    \
 808     FLAG_SET_DEFAULT(opt, false);                        \
 809   }                                                      \
 810 } while(0)
 811 
 812 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP
--- EOF ---