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 /*

  * Copyright 1997-2007 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 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_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_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 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_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_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");

     }

 } ;