/*

 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

// Arguments parses the command line and recognizes options

// Invocation API hook typedefs (these should really be defined in jni.hpp)

extern "C" {

  typedef void (JNICALL *abort_hook_t)(void);

  typedef void (JNICALL *exit_hook_t)(jint code);

  typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args);

}

// Forward declarations

class SysClassPath;

// Element describing System and User (-Dkey=value flags) defined property.

class SystemProperty: public CHeapObj {

 private:

  char*           _key;

  char*           _value;

  SystemProperty* _next;

  bool            _writeable;

  bool writeable()   { return _writeable; }

 public:

  // Accessors

  const char* key() const                   { return _key; }

  char* value() const                       { return _value; }

  SystemProperty* next() const              { return _next; }

  void set_next(SystemProperty* next)       { _next = next; }

  bool set_value(char *value) {

    if (writeable()) {

      if (_value != NULL) {

        FreeHeap(_value);

      }

      _value = AllocateHeap(strlen(value)+1);

      if (_value != NULL) {

        strcpy(_value, value);

      }

      return true;

    }

    return false;

  }

  void append_value(const char *value) {

    char *sp;

    size_t len = 0;

    if (value != NULL) {

      len = strlen(value);

      if (_value != NULL) {

        len += strlen(_value);

      }

      sp = AllocateHeap(len+2);

      if (sp != NULL) {

        if (_value != NULL) {

          strcpy(sp, _value);

          strcat(sp, os::path_separator());

          strcat(sp, value);

          FreeHeap(_value);

        } else {

          strcpy(sp, value);

        }

        _value = sp;

      }

    }

  }

  // Constructor

  SystemProperty(const char* key, const char* value, bool writeable) {

    if (key == NULL) {

      _key = NULL;

    } else {

      _key = AllocateHeap(strlen(key)+1);

      strcpy(_key, key);

    }

    if (value == NULL) {

      _value = NULL;

    } else {

      _value = AllocateHeap(strlen(value)+1);

      strcpy(_value, value);

    }

    _next = NULL;

    _writeable = writeable;

  }

};

// For use by -agentlib, -agentpath and -Xrun

class AgentLibrary : public CHeapObj {

  friend class AgentLibraryList;

 private:

  char*           _name;

  char*           _options;

  void*           _os_lib;

  bool            _is_absolute_path;

  AgentLibrary*   _next;

 public:

  // Accessors

  const char* name() const                  { return _name; }

  char* options() const                     { return _options; }

  bool is_absolute_path() const             { return _is_absolute_path; }

  void* os_lib() const                      { return _os_lib; }

  void set_os_lib(void* os_lib)             { _os_lib = os_lib; }

  AgentLibrary* next() const                { return _next; }

  // Constructor

  AgentLibrary(const char* name, const char* options, bool is_absolute_path, void* os_lib) {

    _name = AllocateHeap(strlen(name)+1);

    strcpy(_name, name);

    if (options == NULL) {

      _options = NULL;

    } else {

      _options = AllocateHeap(strlen(options)+1);

      strcpy(_options, options);

    }

    _is_absolute_path = is_absolute_path;

    _os_lib = os_lib;

    _next = NULL;

  }

};

// maintain an order of entry list of AgentLibrary

class AgentLibraryList VALUE_OBJ_CLASS_SPEC {

 private:

  AgentLibrary*   _first;

  AgentLibrary*   _last;

 public:

  bool is_empty() const                     { return _first == NULL; }

  AgentLibrary* first() const               { return _first; }

  // add to the end of the list

  void add(AgentLibrary* lib) {

    if (is_empty()) {

      _first = _last = lib;

    } else {

      _last->_next = lib;

      _last = lib;

    }

    lib->_next = NULL;

  }

  // search for and remove a library known to be in the list

  void remove(AgentLibrary* lib) {

    AgentLibrary* curr;

    AgentLibrary* prev = NULL;

    for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) {

      if (curr == lib) {

        break;

      }

    }

    assert(curr != NULL, "always should be found");

    if (curr != NULL) {

      // it was found, by-pass this library

      if (prev == NULL) {

        _first = curr->_next;

      } else {

        prev->_next = curr->_next;

      }

      if (curr == _last) {

        _last = prev;

      }

      curr->_next = NULL;

    }

  }

  AgentLibraryList() {

    _first = NULL;

    _last = NULL;

  }

};

class Arguments : AllStatic {

  friend class VMStructs;

  friend class JvmtiExport;

 public:

  // Operation modi

  enum Mode {

    _int,       // corresponds to -Xint

    _mixed,     // corresponds to -Xmixed

    _comp       // corresponds to -Xcomp

  };

  enum ArgsRange {

    arg_unreadable = -3,

    arg_too_small  = -2,

    arg_too_big    = -1,

    arg_in_range   = 0

  };

 private:

  // an array containing all flags specified in the .hotspotrc file

  static char** _jvm_flags_array;

  static int    _num_jvm_flags;

  // an array containing all jvm arguments specified in the command line

  static char** _jvm_args_array;

  static int    _num_jvm_args;

  // string containing all java command (class/jarfile name and app args)

  static char* _java_command;

  // Property list

  static SystemProperty* _system_properties;

  // Quick accessor to System properties in the list:

  static SystemProperty *_java_ext_dirs;

  static SystemProperty *_java_endorsed_dirs;

  static SystemProperty *_sun_boot_library_path;

  static SystemProperty *_java_library_path;

  static SystemProperty *_java_home;

  static SystemProperty *_java_class_path;

  static SystemProperty *_sun_boot_class_path;

  // Meta-index for knowing what packages are in the boot class path

  static char* _meta_index_path;

  static char* _meta_index_dir;

  // java.vendor.url.bug, bug reporting URL for fatal errors.

  static const char* _java_vendor_url_bug;

  // sun.java.launcher, private property to provide information about

  // java/gamma launcher

  static const char* _sun_java_launcher;

  // sun.java.launcher.pid, private property

  static int    _sun_java_launcher_pid;

  // Option flags

  static bool   _has_profile;

  static bool   _has_alloc_profile;

  static const char*  _gc_log_filename;

  static uintx  _min_heap_size;

  // -Xrun arguments

  static AgentLibraryList _libraryList;

  static void add_init_library(const char* name, char* options)

    { _libraryList.add(new AgentLibrary(name, options, false, NULL)); }

  // -agentlib and -agentpath arguments

  static AgentLibraryList _agentList;

  static void add_init_agent(const char* name, char* options, bool absolute_path)

    { _agentList.add(new AgentLibrary(name, options, absolute_path, NULL)); }

  // Late-binding agents not started via arguments

  static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib)

    { _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib)); }

  // Operation modi

  static Mode _mode;

  static void set_mode_flags(Mode mode);

  static bool _java_compiler;

  static void set_java_compiler(bool arg) { _java_compiler = arg; }

  static bool java_compiler()   { return _java_compiler; }

  // -Xdebug flag

  static bool _xdebug_mode;

  static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; }

  static bool xdebug_mode()             { return _xdebug_mode; }

  // Used to save default settings

  static bool _AlwaysCompileLoopMethods;

  static bool _UseOnStackReplacement;

  static bool _BackgroundCompilation;

  static bool _ClipInlining;

  static bool _CIDynamicCompilePriority;

  static intx _Tier2CompileThreshold;

  // CMS/ParNew garbage collectors

  static void set_parnew_gc_flags();

  static void set_cms_and_parnew_gc_flags();

  // UseParallel[Old]GC

  static void set_parallel_gc_flags();

  // Garbage-First (UseG1GC)

  static void set_g1_gc_flags();

  // GC ergonomics

  static void set_ergonomics_flags();

  // Setup heap size

  static void set_heap_size();

  // Based on automatic selection criteria, should the

  // low pause collector be used.

  static bool should_auto_select_low_pause_collector();

  // Bytecode rewriting

  static void set_bytecode_flags();

  // Invocation API hooks

  static abort_hook_t     _abort_hook;

  static exit_hook_t      _exit_hook;

  static vfprintf_hook_t  _vfprintf_hook;

  // System properties

  static bool add_property(const char* prop);

  // Aggressive optimization flags.

  static void set_aggressive_opts_flags();

  // Argument parsing

  static void do_pd_flag_adjustments();

  static bool parse_argument(const char* arg, FlagValueOrigin origin);

  static bool process_argument(const char* arg, jboolean ignore_unrecognized, FlagValueOrigin origin);

  static void process_java_launcher_argument(const char*, void*);

  static void process_java_compiler_argument(char* arg);

  static jint parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p);

  static jint parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p);

  static jint parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p);

  static jint parse_vm_init_args(const JavaVMInitArgs* args);

  static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, SysClassPath* scp_p, bool* scp_assembly_required_p, FlagValueOrigin origin);

  static jint finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required);

  static bool is_bad_option(const JavaVMOption* option, jboolean ignore,

    const char* option_type);

  static bool is_bad_option(const JavaVMOption* option, jboolean ignore) {

    return is_bad_option(option, ignore, NULL);

  }

  static bool verify_interval(uintx val, uintx min,

                              uintx max, const char* name);

  static bool verify_percentage(uintx value, const char* name);

  static void describe_range_error(ArgsRange errcode);

  static ArgsRange check_memory_size(julong size, julong min_size);

  static ArgsRange parse_memory_size(const char* s, julong* long_arg,

                                     julong min_size);

  // Parse a string for a unsigned integer.  Returns true if value

  // is an unsigned integer greater than or equal to the minimum

  // parameter passed and returns the value in uintx_arg.  Returns

  // false otherwise, with uintx_arg undefined.

  static bool parse_uintx(const char* value, uintx* uintx_arg,

                          uintx min_size);

  // methods to build strings from individual args

  static void build_jvm_args(const char* arg);

  static void build_jvm_flags(const char* arg);

  static void add_string(char*** bldarray, int* count, const char* arg);

  static const char* build_resource_string(char** args, int count);

  static bool methodExists(

    char* className, char* methodName,

    int classesNum, char** classes, bool* allMethods,

    int methodsNum, char** methods, bool* allClasses

  );

  static void parseOnlyLine(

    const char* line,

    short* classesNum, short* classesMax, char*** classes, bool** allMethods,

    short* methodsNum, short* methodsMax, char*** methods, bool** allClasses

  );

  // Returns true if the string s is in the list of flags that have recently

  // been made obsolete.  If we detect one of these flags on the command

  // line, instead of failing we print a warning message and ignore the

  // flag.  This gives the user a release or so to stop using the flag.

  static bool is_newly_obsolete(const char* s, JDK_Version* buffer);

  static short  CompileOnlyClassesNum;

  static short  CompileOnlyClassesMax;

  static char** CompileOnlyClasses;

  static bool*  CompileOnlyAllMethods;

  static short  CompileOnlyMethodsNum;

  static short  CompileOnlyMethodsMax;

  static char** CompileOnlyMethods;

  static bool*  CompileOnlyAllClasses;

  static short  InterpretOnlyClassesNum;

  static short  InterpretOnlyClassesMax;

  static char** InterpretOnlyClasses;

  static bool*  InterpretOnlyAllMethods;

  static bool   CheckCompileOnly;

  static char*  SharedArchivePath;

 public:

  // Parses the arguments

  static jint parse(const JavaVMInitArgs* args);

  // Check for consistency in the selection of the garbage collector.

  static bool check_gc_consistency();

  // Check consistecy or otherwise of VM argument settings

  static bool check_vm_args_consistency();

  // Used by os_solaris

  static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized);

  // return a char* array containing all options

  static char** jvm_flags_array()          { return _jvm_flags_array; }

  static char** jvm_args_array()           { return _jvm_args_array; }

  static int num_jvm_flags()               { return _num_jvm_flags; }

  static int num_jvm_args()                { return _num_jvm_args; }

  // return the arguments passed to the Java application

  static const char* java_command()        { return _java_command; }

  // print jvm_flags, jvm_args and java_command

  static void print_on(outputStream* st);

  // convenient methods to obtain / print jvm_flags and jvm_args

  static const char* jvm_flags()           { return build_resource_string(_jvm_flags_array, _num_jvm_flags); }

  static const char* jvm_args()            { return build_resource_string(_jvm_args_array, _num_jvm_args); }

  static void print_jvm_flags_on(outputStream* st);

  static void print_jvm_args_on(outputStream* st);

  // -Dkey=value flags

  static SystemProperty*  system_properties()   { return _system_properties; }

  static const char*    get_property(const char* key);

  // -Djava.vendor.url.bug

  static const char* java_vendor_url_bug()  { return _java_vendor_url_bug; }

  // -Dsun.java.launcher

  static const char* sun_java_launcher()    { return _sun_java_launcher; }

  // Was VM created by a Java launcher?

  static bool created_by_java_launcher();

  // -Dsun.java.launcher.pid

  static int sun_java_launcher_pid()        { return _sun_java_launcher_pid; }

  // -Xloggc:<file>, if not specified will be NULL

  static const char* gc_log_filename()      { return _gc_log_filename; }

  // -Xprof/-Xaprof

  static bool has_profile()                 { return _has_profile; }

  static bool has_alloc_profile()           { return _has_alloc_profile; }

  // -Xms, -Xmx

  static uintx min_heap_size()              { return _min_heap_size; }

  static void  set_min_heap_size(uintx v)   { _min_heap_size = v;  }

  // -Xrun

  static AgentLibrary* libraries()          { return _libraryList.first(); }

  static bool init_libraries_at_startup()   { return !_libraryList.is_empty(); }

  static void convert_library_to_agent(AgentLibrary* lib)

                                            { _libraryList.remove(lib);

                                              _agentList.add(lib); }

  // -agentlib -agentpath

  static AgentLibrary* agents()             { return _agentList.first(); }

  static bool init_agents_at_startup()      { return !_agentList.is_empty(); }

  // abort, exit, vfprintf hooks

  static abort_hook_t    abort_hook()       { return _abort_hook; }

  static exit_hook_t     exit_hook()        { return _exit_hook; }

  static vfprintf_hook_t vfprintf_hook()    { return _vfprintf_hook; }

  static bool GetCheckCompileOnly ()        { return CheckCompileOnly; }

  static const char* GetSharedArchivePath() { return SharedArchivePath; }

  static bool CompileMethod(char* className, char* methodName) {

    return

      methodExists(

        className, methodName,

        CompileOnlyClassesNum, CompileOnlyClasses, CompileOnlyAllMethods,

        CompileOnlyMethodsNum, CompileOnlyMethods, CompileOnlyAllClasses

      );

  }

  // Java launcher properties

  static void process_sun_java_launcher_properties(JavaVMInitArgs* args);

  // System properties

  static void init_system_properties();

  // Property List manipulation

  static void PropertyList_add(SystemProperty** plist, SystemProperty *element);

  static void PropertyList_add(SystemProperty** plist, const char* k, char* v);

  static void PropertyList_unique_add(SystemProperty** plist, const char* k, char* v) {

    PropertyList_unique_add(plist, k, v, false);

  }

  static void PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append);

  static const char* PropertyList_get_value(SystemProperty* plist, const char* key);

  static int  PropertyList_count(SystemProperty* pl);

  static const char* PropertyList_get_key_at(SystemProperty* pl,int index);

  static char* PropertyList_get_value_at(SystemProperty* pl,int index);

  // Miscellaneous System property value getter and setters.

  static void set_dll_dir(char *value) { _sun_boot_library_path->set_value(value); }

  static void set_java_home(char *value) { _java_home->set_value(value); }

  static void set_library_path(char *value) { _java_library_path->set_value(value); }

  static void set_ext_dirs(char *value) { _java_ext_dirs->set_value(value); }

  static void set_endorsed_dirs(char *value) { _java_endorsed_dirs->set_value(value); }

  static void set_sysclasspath(char *value) { _sun_boot_class_path->set_value(value); }

  static void append_sysclasspath(const char *value) { _sun_boot_class_path->append_value(value); }

  static void set_meta_index_path(char* meta_index_path, char* meta_index_dir) {

    _meta_index_path = meta_index_path;

    _meta_index_dir  = meta_index_dir;

  }

  static char *get_java_home() { return _java_home->value(); }

  static char *get_dll_dir() { return _sun_boot_library_path->value(); }

  static char *get_endorsed_dir() { return _java_endorsed_dirs->value(); }

  static char *get_sysclasspath() { return _sun_boot_class_path->value(); }

  static char* get_meta_index_path() { return _meta_index_path; }

  static char* get_meta_index_dir()  { return _meta_index_dir;  }

  // Operation modi

  static Mode mode()                        { return _mode; }

  // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid.

  static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen);

#ifdef KERNEL

  // For java kernel vm, return property string for kernel properties.

  static char *get_kernel_properties();

#endif // KERNEL

};