/*

 * Copyright 1997-2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 *

 */

// Solaris_OS defines the interface to Solaris operating systems

class Solaris {

  friend class os;

 private:

  // Support for "new" libthread APIs for getting & setting thread context (2.8)

  #define TRS_VALID       0

  #define TRS_NONVOLATILE 1

  #define TRS_LWPID       2

  #define TRS_INVALID     3

  // _T2_libthread is true if we believe we are running with the newer

  // SunSoft lib/lwp/libthread: default Solaris 9, available Solaris 8

  // which is a lightweight libthread that also supports all T1

  static bool _T2_libthread;

  // These refer to new libthread interface functions

  // They get intialized if we dynamically detect new libthread

  static int_fnP_thread_t_iP_uP_stack_tP_gregset_t _thr_getstate;

  static int_fnP_thread_t_i_gregset_t _thr_setstate;

  static int_fnP_thread_t_i _thr_setmutator;

  static int_fnP_thread_t _thr_suspend_mutator;

  static int_fnP_thread_t _thr_continue_mutator;

  // libthread_init sets the above, if the new functionality is detected

  // initialized to libthread or lwp synchronization primitives depending on UseLWPSychronization

  static int_fnP_mutex_tP _mutex_lock;

  static int_fnP_mutex_tP _mutex_trylock;

  static int_fnP_mutex_tP _mutex_unlock;

  static int_fnP_mutex_tP_i_vP _mutex_init;

  static int_fnP_mutex_tP _mutex_destroy;

  static int _mutex_scope;

  static int_fnP_cond_tP_mutex_tP_timestruc_tP _cond_timedwait;

  static int_fnP_cond_tP_mutex_tP _cond_wait;

  static int_fnP_cond_tP _cond_signal;

  static int_fnP_cond_tP _cond_broadcast;

  static int_fnP_cond_tP_i_vP _cond_init;

  static int_fnP_cond_tP _cond_destroy;

  static int _cond_scope;

  typedef uintptr_t       lgrp_cookie_t;

  typedef id_t            lgrp_id_t;

  typedef int             lgrp_rsrc_t;

  typedef enum lgrp_view {

        LGRP_VIEW_CALLER,       /* what's available to the caller */

        LGRP_VIEW_OS            /* what's available to operating system */

  } lgrp_view_t;

  typedef lgrp_id_t (*lgrp_home_func_t)(idtype_t idtype, id_t id);

  typedef lgrp_cookie_t (*lgrp_init_func_t)(lgrp_view_t view);

  typedef int (*lgrp_fini_func_t)(lgrp_cookie_t cookie);

  typedef lgrp_id_t (*lgrp_root_func_t)(lgrp_cookie_t cookie);

  typedef int (*lgrp_children_func_t)(lgrp_cookie_t  cookie,  lgrp_id_t  parent,

                                      lgrp_id_t *lgrp_array, uint_t lgrp_array_size);

  typedef int (*lgrp_resources_func_t)(lgrp_cookie_t  cookie,  lgrp_id_t  lgrp,

                                      lgrp_id_t *lgrp_array, uint_t lgrp_array_size,

                                      lgrp_rsrc_t type);

  typedef int (*lgrp_nlgrps_func_t)(lgrp_cookie_t cookie);

  typedef int (*lgrp_cookie_stale_func_t)(lgrp_cookie_t cookie);

  typedef int (*meminfo_func_t)(const uint64_t inaddr[],   int addr_count,

                                const uint_t  info_req[],  int info_count,

                                uint64_t  outdata[], uint_t validity[]);

  static lgrp_home_func_t _lgrp_home;

  static lgrp_init_func_t _lgrp_init;

  static lgrp_fini_func_t _lgrp_fini;

  static lgrp_root_func_t _lgrp_root;

  static lgrp_children_func_t _lgrp_children;

  static lgrp_resources_func_t _lgrp_resources;

  static lgrp_nlgrps_func_t _lgrp_nlgrps;

  static lgrp_cookie_stale_func_t _lgrp_cookie_stale;

  static lgrp_cookie_t _lgrp_cookie;

  static meminfo_func_t _meminfo;

  // Large Page Support--mpss.

  static bool set_mpss_range(caddr_t start, size_t bytes, size_t align);

  static void init_thread_fpu_state(void);

  static void try_enable_extended_io();

  // For signal-chaining

  static unsigned long sigs;                 // mask of signals that have

                                             // preinstalled signal handlers

  static struct sigaction *(*get_signal_action)(int);

  static struct sigaction *get_preinstalled_handler(int);

  static int (*get_libjsig_version)();

  static void save_preinstalled_handler(int, struct sigaction&);

  static void check_signal_handler(int sig);

  // For overridable signals

  static int _SIGinterrupt;                  // user-overridable INTERRUPT_SIGNAL

  static int _SIGasync;                      // user-overridable ASYNC_SIGNAL

  static void set_SIGinterrupt(int newsig) { _SIGinterrupt = newsig; }

  static void set_SIGasync(int newsig) { _SIGasync = newsig; }

 public:

  // Large Page Support--ISM.

  static bool largepage_range(char* addr, size_t size);

  static int SIGinterrupt() { return _SIGinterrupt; }

  static int SIGasync() { return _SIGasync; }

  static address handler_start, handler_end; // start and end pc of thr_sighndlrinfo

  static bool valid_stack_address(Thread* thread, address sp);

  static bool valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect);

  static ucontext_t* get_valid_uc_in_signal_handler(Thread* thread,

    ucontext_t* uc);

  static ExtendedPC  ucontext_get_ExtendedPC(ucontext_t* uc);

  static intptr_t*   ucontext_get_sp(ucontext_t* uc);

  // ucontext_get_fp() is only used by Solaris X86 (see note below)

  static intptr_t*   ucontext_get_fp(ucontext_t* uc);

  // For Analyzer Forte AsyncGetCallTrace profiling support:

  // Parameter ret_fp is only used by Solaris X86.

  //

  // We should have different declarations of this interface in

  // os_solaris_i486.hpp and os_solaris_sparc.hpp, but that file

  // provides extensions to the os class and not the Solaris class.

  static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc,

    intptr_t** ret_sp, intptr_t** ret_fp);

  static void hotspot_sigmask(Thread* thread);

 protected:

  // Solaris-specific interface goes here

  static julong available_memory();

  static julong physical_memory() { return _physical_memory; }

  static julong _physical_memory;

  static void initialize_system_info();

  static int _dev_zero_fd;

  static int get_dev_zero_fd() { return _dev_zero_fd; }

  static void set_dev_zero_fd(int fd) { _dev_zero_fd = fd; }

  static char* mmap_chunk(char *addr, size_t size, int flags, int prot);

  static char* anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed);

  static bool mpss_sanity_check(bool warn, size_t * page_size);

  static bool ism_sanity_check (bool warn, size_t * page_size);

  // Workaround for 4352906. thr_stksegment sometimes returns

  // a bad value for the primordial thread's stack base when

  // it is called more than one time.

  // Workaround is to cache the initial value to avoid further

  // calls to thr_stksegment.

  // It appears that someone (Hotspot?) is trashing the user's

  // proc_t structure (note that this is a system struct).

  static address _main_stack_base;

 public:

  static void libthread_init();

  static void synchronization_init();

  static void liblgrp_init();

  // Load miscellaneous symbols.

  static void misc_sym_init();

  // This boolean allows users to forward their own non-matching signals

  // to JVM_handle_solaris_signal, harmlessly.

  static bool signal_handlers_are_installed;

  static void signal_sets_init();

  static void install_signal_handlers();

  static void set_signal_handler(int sig, bool set_installed, bool oktochain);

  static void init_signal_mem();

  static bool is_sig_ignored(int sig);

  static void set_our_sigflags(int, int);

  static int get_our_sigflags(int);

  // For signal-chaining

  static bool libjsig_is_loaded; // libjsig that interposes sigaction(),

                                 // signal(), sigset() is loaded

  static struct sigaction *get_chained_signal_action(int sig);

  static bool chained_handler(int sig, siginfo_t *siginfo, void *context);

  // The following allow us to link against both the old and new libthread (2.8)

  // and exploit the new libthread functionality if available.

  static bool T2_libthread()                                { return _T2_libthread; }

  static void set_T2_libthread(bool T2_libthread) { _T2_libthread = T2_libthread; }

  static int thr_getstate(thread_t tid, int *flag, unsigned *lwp, stack_t *ss, gregset_t rs)

    { return _thr_getstate(tid, flag, lwp, ss, rs); }

  static void set_thr_getstate(int_fnP_thread_t_iP_uP_stack_tP_gregset_t func)

    { _thr_getstate = func; }

  static int thr_setstate(thread_t tid, int flag, gregset_t rs)   { return _thr_setstate(tid, flag, rs); }

  static void set_thr_setstate(int_fnP_thread_t_i_gregset_t func) { _thr_setstate = func; }

  static int thr_setmutator(thread_t tid, int enabled)    { return _thr_setmutator(tid, enabled); }

  static void set_thr_setmutator(int_fnP_thread_t_i func) { _thr_setmutator = func; }

  static int  thr_suspend_mutator(thread_t tid)              { return _thr_suspend_mutator(tid); }

  static void set_thr_suspend_mutator(int_fnP_thread_t func) { _thr_suspend_mutator = func; }

  static int  thr_continue_mutator(thread_t tid)              { return _thr_continue_mutator(tid); }

  static void set_thr_continue_mutator(int_fnP_thread_t func) { _thr_continue_mutator = func; }

  // Allows us to switch between lwp and thread -based synchronization

  static int mutex_lock(mutex_t *mx)    { return _mutex_lock(mx); }

  static int mutex_trylock(mutex_t *mx) { return _mutex_trylock(mx); }

  static int mutex_unlock(mutex_t *mx)  { return _mutex_unlock(mx); }

  static int mutex_init(mutex_t *mx)    { return _mutex_init(mx, os::Solaris::mutex_scope(), NULL); }

  static int mutex_destroy(mutex_t *mx) { return _mutex_destroy(mx); }

  static int mutex_scope()              { return _mutex_scope; }

  static void set_mutex_lock(int_fnP_mutex_tP func)      { _mutex_lock = func; }

  static void set_mutex_trylock(int_fnP_mutex_tP func)   { _mutex_trylock = func; }

  static void set_mutex_unlock(int_fnP_mutex_tP func)    { _mutex_unlock = func; }

  static void set_mutex_init(int_fnP_mutex_tP_i_vP func) { _mutex_init = func; }

  static void set_mutex_destroy(int_fnP_mutex_tP func)   { _mutex_destroy = func; }

  static void set_mutex_scope(int scope)                 { _mutex_scope = scope; }

  static int cond_timedwait(cond_t *cv, mutex_t *mx, timestruc_t *abst)

                                                { return _cond_timedwait(cv, mx, abst); }

  static int cond_wait(cond_t *cv, mutex_t *mx) { return _cond_wait(cv, mx); }

  static int cond_signal(cond_t *cv)            { return _cond_signal(cv); }

  static int cond_broadcast(cond_t *cv)         { return _cond_broadcast(cv); }

  static int cond_init(cond_t *cv)              { return _cond_init(cv, os::Solaris::cond_scope(), NULL); }

  static int cond_destroy(cond_t *cv)           { return _cond_destroy(cv); }

  static int cond_scope()                       { return _cond_scope; }

  static void set_cond_timedwait(int_fnP_cond_tP_mutex_tP_timestruc_tP func)

                                                           { _cond_timedwait = func; }

  static void set_cond_wait(int_fnP_cond_tP_mutex_tP func) { _cond_wait = func; }

  static void set_cond_signal(int_fnP_cond_tP func)        { _cond_signal = func; }

  static void set_cond_broadcast(int_fnP_cond_tP func)     { _cond_broadcast = func; }

  static void set_cond_init(int_fnP_cond_tP_i_vP func)     { _cond_init = func; }

  static void set_cond_destroy(int_fnP_cond_tP func)       { _cond_destroy = func; }

  static void set_cond_scope(int scope)                    { _cond_scope = scope; }

  static void set_lgrp_home(lgrp_home_func_t func) { _lgrp_home = func; }

  static void set_lgrp_init(lgrp_init_func_t func) { _lgrp_init = func; }

  static void set_lgrp_fini(lgrp_fini_func_t func) { _lgrp_fini = func; }

  static void set_lgrp_root(lgrp_root_func_t func) { _lgrp_root = func; }

  static void set_lgrp_children(lgrp_children_func_t func)   { _lgrp_children = func; }

  static void set_lgrp_resources(lgrp_resources_func_t func) { _lgrp_resources = func; }

  static void set_lgrp_nlgrps(lgrp_nlgrps_func_t func)       { _lgrp_nlgrps = func; }

  static void set_lgrp_cookie_stale(lgrp_cookie_stale_func_t func) { _lgrp_cookie_stale = func; }

  static void set_lgrp_cookie(lgrp_cookie_t cookie)  { _lgrp_cookie = cookie; }

  static id_t lgrp_home(idtype_t type, id_t id)      { return _lgrp_home != NULL ? _lgrp_home(type, id) : -1; }

  static lgrp_cookie_t lgrp_init(lgrp_view_t view)   { return _lgrp_init != NULL ? _lgrp_init(view) : 0; }

  static int lgrp_fini(lgrp_cookie_t cookie)         { return _lgrp_fini != NULL ? _lgrp_fini(cookie) : -1; }

  static lgrp_id_t lgrp_root(lgrp_cookie_t cookie)   { return _lgrp_root != NULL ? _lgrp_root(cookie) : -1; };

  static int lgrp_children(lgrp_cookie_t  cookie,  lgrp_id_t  parent,

                    lgrp_id_t *lgrp_array, uint_t lgrp_array_size) {

    return _lgrp_children != NULL ? _lgrp_children(cookie, parent, lgrp_array, lgrp_array_size) : -1;

  }

  static int lgrp_resources(lgrp_cookie_t  cookie,  lgrp_id_t  lgrp,

                            lgrp_id_t *lgrp_array, uint_t lgrp_array_size,

                            lgrp_rsrc_t type) {

    return _lgrp_resources != NULL ? _lgrp_resources(cookie, lgrp, lgrp_array, lgrp_array_size, type) : -1;

  }

  static int lgrp_nlgrps(lgrp_cookie_t cookie)       { return _lgrp_nlgrps != NULL ? _lgrp_nlgrps(cookie) : -1; }

  static int lgrp_cookie_stale(lgrp_cookie_t cookie) {

    return _lgrp_cookie_stale != NULL ? _lgrp_cookie_stale(cookie) : -1;

  }

  static lgrp_cookie_t lgrp_cookie()                 { return _lgrp_cookie; }

  static void set_meminfo(meminfo_func_t func)       { _meminfo = func; }

  static int meminfo (const uint64_t inaddr[],   int addr_count,

                     const uint_t  info_req[],  int info_count,

                     uint64_t  outdata[], uint_t validity[]) {

    return _meminfo != NULL ? _meminfo(inaddr, addr_count, info_req, info_count,

                                       outdata, validity) : -1;

  }

  enum {

    clear_interrupted = true

  };

  static void setup_interruptible(JavaThread* thread);

  static void setup_interruptible_already_blocked(JavaThread* thread);

  static JavaThread* setup_interruptible();

  static void cleanup_interruptible(JavaThread* thread);

  // perf counter incrementers used by _INTERRUPTIBLE

  static void bump_interrupted_before_count();

  static void bump_interrupted_during_count();

#ifdef ASSERT

  static JavaThread* setup_interruptible_native();

  static void cleanup_interruptible_native(JavaThread* thread);

#endif

  static sigset_t* unblocked_signals();

  static sigset_t* vm_signals();

  static sigset_t* allowdebug_blocked_signals();

  // %%% Following should be promoted to os.hpp:

  // Trace number of created threads

  static          jint  _os_thread_limit;

  static volatile jint  _os_thread_count;

  // Minimum stack size a thread can be created with (allowing

  // the VM to completely create the thread and enter user code)

  static size_t min_stack_allowed;

  // Stack overflow handling

  static int max_register_window_saves_before_flushing();

  // Stack repair handling

  // none present

};

class PlatformEvent : public CHeapObj {

  private:

    double CachePad [4] ;   // increase odds that _mutex is sole occupant of cache line

    volatile int _Event ;

    int _nParked ;

    int _pipev [2] ;

    mutex_t _mutex  [1] ;

    cond_t  _cond   [1] ;

    double PostPad  [2] ;

  protected:

    // Defining a protected ctor effectively gives us an abstract base class.

    // That is, a PlatformEvent can never be instantiated "naked" but only

    // as a part of a ParkEvent (recall that ParkEvent extends PlatformEvent).

    // TODO-FIXME: make dtor private

    ~PlatformEvent() { guarantee (0, "invariant") ; }

    PlatformEvent() {

      int status;

      status = os::Solaris::cond_init(_cond);

      assert_status(status == 0, status, "cond_init");

      status = os::Solaris::mutex_init(_mutex);

      assert_status(status == 0, status, "mutex_init");

      _Event   = 0 ;

      _nParked = 0 ;

      _pipev[0] = _pipev[1] = -1 ;

    }

  public:

    // Exercise caution using reset() and fired() -- they may require MEMBARs

    void reset() { _Event = 0 ; }

    int  fired() { return _Event; }

    void park () ;

    int  park (jlong millis) ;

    int  TryPark () ;

    void unpark () ;

} ;

class PlatformParker : public CHeapObj {

  protected:

    mutex_t _mutex [1] ;

    cond_t  _cond  [1] ;

  public:       // TODO-FIXME: make dtor private

    ~PlatformParker() { guarantee (0, "invariant") ; }

  public:

    PlatformParker() {

      int status;

      status = os::Solaris::cond_init(_cond);

      assert_status(status == 0, status, "cond_init");

      status = os::Solaris::mutex_init(_mutex);

      assert_status(status == 0, status, "mutex_init");

    }

} ;