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src/os/solaris/vm/os_solaris.hpp@f90c822e73f8 (annotated)

src/os/solaris/vm/os_solaris.hpp

Wed, 27 Apr 2016 01:25:04 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:25:04 +0800

changeset 0

f90c822e73f8

child 6876

710a3c8b516e

permissions

-rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#ifndef OS_SOLARIS_VM_OS_SOLARIS_HPP
aoqi@0	26	#define OS_SOLARIS_VM_OS_SOLARIS_HPP
aoqi@0	27
aoqi@0	28	// Solaris_OS defines the interface to Solaris operating systems
aoqi@0	29
aoqi@0	30	// Information about the protection of the page at address '0' on this os.
aoqi@0	31	static bool zero_page_read_protected() { return true; }
aoqi@0	32
aoqi@0	33	class Solaris {
aoqi@0	34	friend class os;
aoqi@0	35
aoqi@0	36	private:
aoqi@0	37
aoqi@0	38	// Support for "new" libthread APIs for getting & setting thread context (2.8)
aoqi@0	39	#define TRS_VALID 0
aoqi@0	40	#define TRS_NONVOLATILE 1
aoqi@0	41	#define TRS_LWPID 2
aoqi@0	42	#define TRS_INVALID 3
aoqi@0	43
aoqi@0	44	// _T2_libthread is true if we believe we are running with the newer
aoqi@0	45	// SunSoft lib/lwp/libthread: default Solaris 9, available Solaris 8
aoqi@0	46	// which is a lightweight libthread that also supports all T1
aoqi@0	47	static bool _T2_libthread;
aoqi@0	48	// These refer to new libthread interface functions
aoqi@0	49	// They get intialized if we dynamically detect new libthread
aoqi@0	50	static int_fnP_thread_t_iP_uP_stack_tP_gregset_t _thr_getstate;
aoqi@0	51	static int_fnP_thread_t_i_gregset_t _thr_setstate;
aoqi@0	52	static int_fnP_thread_t_i _thr_setmutator;
aoqi@0	53	static int_fnP_thread_t _thr_suspend_mutator;
aoqi@0	54	static int_fnP_thread_t _thr_continue_mutator;
aoqi@0	55	// libthread_init sets the above, if the new functionality is detected
aoqi@0	56
aoqi@0	57	// initialized to libthread or lwp synchronization primitives depending on UseLWPSychronization
aoqi@0	58	static int_fnP_mutex_tP _mutex_lock;
aoqi@0	59	static int_fnP_mutex_tP _mutex_trylock;
aoqi@0	60	static int_fnP_mutex_tP _mutex_unlock;
aoqi@0	61	static int_fnP_mutex_tP_i_vP _mutex_init;
aoqi@0	62	static int_fnP_mutex_tP _mutex_destroy;
aoqi@0	63	static int _mutex_scope;
aoqi@0	64
aoqi@0	65	static int_fnP_cond_tP_mutex_tP_timestruc_tP _cond_timedwait;
aoqi@0	66	static int_fnP_cond_tP_mutex_tP _cond_wait;
aoqi@0	67	static int_fnP_cond_tP _cond_signal;
aoqi@0	68	static int_fnP_cond_tP _cond_broadcast;
aoqi@0	69	static int_fnP_cond_tP_i_vP _cond_init;
aoqi@0	70	static int_fnP_cond_tP _cond_destroy;
aoqi@0	71	static int _cond_scope;
aoqi@0	72
aoqi@0	73	typedef uintptr_t lgrp_cookie_t;
aoqi@0	74	typedef id_t lgrp_id_t;
aoqi@0	75	typedef int lgrp_rsrc_t;
aoqi@0	76	typedef enum lgrp_view {
aoqi@0	77	LGRP_VIEW_CALLER, /* what's available to the caller */
aoqi@0	78	LGRP_VIEW_OS /* what's available to operating system */
aoqi@0	79	} lgrp_view_t;
aoqi@0	80
aoqi@0	81	typedef uint_t (*getisax_func_t)(uint32_t* array, uint_t n);
aoqi@0	82
aoqi@0	83	typedef lgrp_id_t (*lgrp_home_func_t)(idtype_t idtype, id_t id);
aoqi@0	84	typedef lgrp_cookie_t (*lgrp_init_func_t)(lgrp_view_t view);
aoqi@0	85	typedef int (*lgrp_fini_func_t)(lgrp_cookie_t cookie);
aoqi@0	86	typedef lgrp_id_t (*lgrp_root_func_t)(lgrp_cookie_t cookie);
aoqi@0	87	typedef int (*lgrp_children_func_t)(lgrp_cookie_t cookie, lgrp_id_t parent,
aoqi@0	88	lgrp_id_t *lgrp_array, uint_t lgrp_array_size);
aoqi@0	89	typedef int (*lgrp_resources_func_t)(lgrp_cookie_t cookie, lgrp_id_t lgrp,
aoqi@0	90	lgrp_id_t *lgrp_array, uint_t lgrp_array_size,
aoqi@0	91	lgrp_rsrc_t type);
aoqi@0	92	typedef int (*lgrp_nlgrps_func_t)(lgrp_cookie_t cookie);
aoqi@0	93	typedef int (*lgrp_cookie_stale_func_t)(lgrp_cookie_t cookie);
aoqi@0	94	typedef int (*meminfo_func_t)(const uint64_t inaddr[], int addr_count,
aoqi@0	95	const uint_t info_req[], int info_count,
aoqi@0	96	uint64_t outdata[], uint_t validity[]);
aoqi@0	97
aoqi@0	98	static getisax_func_t _getisax;
aoqi@0	99
aoqi@0	100	static lgrp_home_func_t _lgrp_home;
aoqi@0	101	static lgrp_init_func_t _lgrp_init;
aoqi@0	102	static lgrp_fini_func_t _lgrp_fini;
aoqi@0	103	static lgrp_root_func_t _lgrp_root;
aoqi@0	104	static lgrp_children_func_t _lgrp_children;
aoqi@0	105	static lgrp_resources_func_t _lgrp_resources;
aoqi@0	106	static lgrp_nlgrps_func_t _lgrp_nlgrps;
aoqi@0	107	static lgrp_cookie_stale_func_t _lgrp_cookie_stale;
aoqi@0	108	static lgrp_cookie_t _lgrp_cookie;
aoqi@0	109
aoqi@0	110	static meminfo_func_t _meminfo;
aoqi@0	111
aoqi@0	112	// Large Page Support
aoqi@0	113	static bool setup_large_pages(caddr_t start, size_t bytes, size_t align);
aoqi@0	114
aoqi@0	115	static void init_thread_fpu_state(void);
aoqi@0	116
aoqi@0	117	static void try_enable_extended_io();
aoqi@0	118
aoqi@0	119	// For signal-chaining
aoqi@0	120	static unsigned long sigs; // mask of signals that have
aoqi@0	121	// preinstalled signal handlers
aoqi@0	122	static struct sigaction *(*get_signal_action)(int);
aoqi@0	123	static struct sigaction *get_preinstalled_handler(int);
aoqi@0	124	static int (*get_libjsig_version)();
aoqi@0	125	static void save_preinstalled_handler(int, struct sigaction&);
aoqi@0	126	static void check_signal_handler(int sig);
aoqi@0	127	// For overridable signals
aoqi@0	128	static int _SIGinterrupt; // user-overridable INTERRUPT_SIGNAL
aoqi@0	129	static int _SIGasync; // user-overridable ASYNC_SIGNAL
aoqi@0	130	static void set_SIGinterrupt(int newsig) { _SIGinterrupt = newsig; }
aoqi@0	131	static void set_SIGasync(int newsig) { _SIGasync = newsig; }
aoqi@0	132
aoqi@0	133	public:
aoqi@0	134	// Large Page Support--ISM.
aoqi@0	135	static bool largepage_range(char* addr, size_t size);
aoqi@0	136
aoqi@0	137	static int SIGinterrupt() { return _SIGinterrupt; }
aoqi@0	138	static int SIGasync() { return _SIGasync; }
aoqi@0	139	static address handler_start, handler_end; // start and end pc of thr_sighndlrinfo
aoqi@0	140
aoqi@0	141	static bool valid_stack_address(Thread* thread, address sp);
aoqi@0	142	static bool valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect);
aoqi@0	143	static ucontext_t* get_valid_uc_in_signal_handler(Thread* thread,
aoqi@0	144	ucontext_t* uc);
aoqi@0	145
aoqi@0	146	static ExtendedPC ucontext_get_ExtendedPC(ucontext_t* uc);
aoqi@0	147	static intptr_t* ucontext_get_sp(ucontext_t* uc);
aoqi@0	148	// ucontext_get_fp() is only used by Solaris X86 (see note below)
aoqi@0	149	static intptr_t* ucontext_get_fp(ucontext_t* uc);
aoqi@0	150	static address ucontext_get_pc(ucontext_t* uc);
aoqi@0	151
aoqi@0	152	// For Analyzer Forte AsyncGetCallTrace profiling support:
aoqi@0	153	// Parameter ret_fp is only used by Solaris X86.
aoqi@0	154	//
aoqi@0	155	// We should have different declarations of this interface in
aoqi@0	156	// os_solaris_i486.hpp and os_solaris_sparc.hpp, but that file
aoqi@0	157	// provides extensions to the os class and not the Solaris class.
aoqi@0	158	static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc,
aoqi@0	159	intptr_t** ret_sp, intptr_t** ret_fp);
aoqi@0	160
aoqi@0	161	static void hotspot_sigmask(Thread* thread);
aoqi@0	162
aoqi@0	163	// SR_handler
aoqi@0	164	static void SR_handler(Thread* thread, ucontext_t* uc);
aoqi@0	165	protected:
aoqi@0	166	// Solaris-specific interface goes here
aoqi@0	167	static julong available_memory();
aoqi@0	168	static julong physical_memory() { return _physical_memory; }
aoqi@0	169	static julong _physical_memory;
aoqi@0	170	static void initialize_system_info();
aoqi@0	171	static int _dev_zero_fd;
aoqi@0	172	static int get_dev_zero_fd() { return _dev_zero_fd; }
aoqi@0	173	static void set_dev_zero_fd(int fd) { _dev_zero_fd = fd; }
aoqi@0	174	static int commit_memory_impl(char* addr, size_t bytes, bool exec);
aoqi@0	175	static int commit_memory_impl(char* addr, size_t bytes,
aoqi@0	176	size_t alignment_hint, bool exec);
aoqi@0	177	static char* mmap_chunk(char *addr, size_t size, int flags, int prot);
aoqi@0	178	static char* anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed);
aoqi@0	179	static bool mpss_sanity_check(bool warn, size_t * page_size);
aoqi@0	180
aoqi@0	181	// Workaround for 4352906. thr_stksegment sometimes returns
aoqi@0	182	// a bad value for the primordial thread's stack base when
aoqi@0	183	// it is called more than one time.
aoqi@0	184	// Workaround is to cache the initial value to avoid further
aoqi@0	185	// calls to thr_stksegment.
aoqi@0	186	// It appears that someone (Hotspot?) is trashing the user's
aoqi@0	187	// proc_t structure (note that this is a system struct).
aoqi@0	188	static address _main_stack_base;
aoqi@0	189
aoqi@0	190	static void print_distro_info(outputStream* st);
aoqi@0	191	static void print_libversion_info(outputStream* st);
aoqi@0	192
aoqi@0	193	public:
aoqi@0	194	static void libthread_init();
aoqi@0	195	static void synchronization_init();
aoqi@0	196	static bool liblgrp_init();
aoqi@0	197	// Load miscellaneous symbols.
aoqi@0	198	static void misc_sym_init();
aoqi@0	199	// This boolean allows users to forward their own non-matching signals
aoqi@0	200	// to JVM_handle_solaris_signal, harmlessly.
aoqi@0	201	static bool signal_handlers_are_installed;
aoqi@0	202
aoqi@0	203	static void signal_sets_init();
aoqi@0	204	static void install_signal_handlers();
aoqi@0	205	static void set_signal_handler(int sig, bool set_installed, bool oktochain);
aoqi@0	206	static void init_signal_mem();
aoqi@0	207	static bool is_sig_ignored(int sig);
aoqi@0	208	static void set_our_sigflags(int, int);
aoqi@0	209	static int get_our_sigflags(int);
aoqi@0	210
aoqi@0	211	// For signal-chaining
aoqi@0	212	static bool libjsig_is_loaded; // libjsig that interposes sigaction(),
aoqi@0	213	// signal(), sigset() is loaded
aoqi@0	214	static struct sigaction *get_chained_signal_action(int sig);
aoqi@0	215	static bool chained_handler(int sig, siginfo_t *siginfo, void *context);
aoqi@0	216
aoqi@0	217	// The following allow us to link against both the old and new libthread (2.8)
aoqi@0	218	// and exploit the new libthread functionality if available.
aoqi@0	219
aoqi@0	220	static bool T2_libthread() { return _T2_libthread; }
aoqi@0	221	static void set_T2_libthread(bool T2_libthread) { _T2_libthread = T2_libthread; }
aoqi@0	222
aoqi@0	223	static int thr_getstate(thread_t tid, int *flag, unsigned *lwp, stack_t *ss, gregset_t rs)
aoqi@0	224	{ return _thr_getstate(tid, flag, lwp, ss, rs); }
aoqi@0	225	static void set_thr_getstate(int_fnP_thread_t_iP_uP_stack_tP_gregset_t func)
aoqi@0	226	{ _thr_getstate = func; }
aoqi@0	227
aoqi@0	228	static int thr_setstate(thread_t tid, int flag, gregset_t rs) { return _thr_setstate(tid, flag, rs); }
aoqi@0	229	static void set_thr_setstate(int_fnP_thread_t_i_gregset_t func) { _thr_setstate = func; }
aoqi@0	230
aoqi@0	231	static int thr_setmutator(thread_t tid, int enabled) { return _thr_setmutator(tid, enabled); }
aoqi@0	232	static void set_thr_setmutator(int_fnP_thread_t_i func) { _thr_setmutator = func; }
aoqi@0	233
aoqi@0	234	static int thr_suspend_mutator(thread_t tid) { return _thr_suspend_mutator(tid); }
aoqi@0	235	static void set_thr_suspend_mutator(int_fnP_thread_t func) { _thr_suspend_mutator = func; }
aoqi@0	236
aoqi@0	237	static int thr_continue_mutator(thread_t tid) { return _thr_continue_mutator(tid); }
aoqi@0	238	static void set_thr_continue_mutator(int_fnP_thread_t func) { _thr_continue_mutator = func; }
aoqi@0	239
aoqi@0	240	// Allows us to switch between lwp and thread -based synchronization
aoqi@0	241	static int mutex_lock(mutex_t *mx) { return _mutex_lock(mx); }
aoqi@0	242	static int mutex_trylock(mutex_t *mx) { return _mutex_trylock(mx); }
aoqi@0	243	static int mutex_unlock(mutex_t *mx) { return _mutex_unlock(mx); }
aoqi@0	244	static int mutex_init(mutex_t *mx) { return _mutex_init(mx, os::Solaris::mutex_scope(), NULL); }
aoqi@0	245	static int mutex_destroy(mutex_t *mx) { return _mutex_destroy(mx); }
aoqi@0	246	static int mutex_scope() { return _mutex_scope; }
aoqi@0	247
aoqi@0	248	static void set_mutex_lock(int_fnP_mutex_tP func) { _mutex_lock = func; }
aoqi@0	249	static void set_mutex_trylock(int_fnP_mutex_tP func) { _mutex_trylock = func; }
aoqi@0	250	static void set_mutex_unlock(int_fnP_mutex_tP func) { _mutex_unlock = func; }
aoqi@0	251	static void set_mutex_init(int_fnP_mutex_tP_i_vP func) { _mutex_init = func; }
aoqi@0	252	static void set_mutex_destroy(int_fnP_mutex_tP func) { _mutex_destroy = func; }
aoqi@0	253	static void set_mutex_scope(int scope) { _mutex_scope = scope; }
aoqi@0	254
aoqi@0	255	static int cond_timedwait(cond_t *cv, mutex_t *mx, timestruc_t *abst)
aoqi@0	256	{ return _cond_timedwait(cv, mx, abst); }
aoqi@0	257	static int cond_wait(cond_t *cv, mutex_t *mx) { return _cond_wait(cv, mx); }
aoqi@0	258	static int cond_signal(cond_t *cv) { return _cond_signal(cv); }
aoqi@0	259	static int cond_broadcast(cond_t *cv) { return _cond_broadcast(cv); }
aoqi@0	260	static int cond_init(cond_t *cv) { return _cond_init(cv, os::Solaris::cond_scope(), NULL); }
aoqi@0	261	static int cond_destroy(cond_t *cv) { return _cond_destroy(cv); }
aoqi@0	262	static int cond_scope() { return _cond_scope; }
aoqi@0	263
aoqi@0	264	static void set_cond_timedwait(int_fnP_cond_tP_mutex_tP_timestruc_tP func)
aoqi@0	265	{ _cond_timedwait = func; }
aoqi@0	266	static void set_cond_wait(int_fnP_cond_tP_mutex_tP func) { _cond_wait = func; }
aoqi@0	267	static void set_cond_signal(int_fnP_cond_tP func) { _cond_signal = func; }
aoqi@0	268	static void set_cond_broadcast(int_fnP_cond_tP func) { _cond_broadcast = func; }
aoqi@0	269	static void set_cond_init(int_fnP_cond_tP_i_vP func) { _cond_init = func; }
aoqi@0	270	static void set_cond_destroy(int_fnP_cond_tP func) { _cond_destroy = func; }
aoqi@0	271	static void set_cond_scope(int scope) { _cond_scope = scope; }
aoqi@0	272
aoqi@0	273	static void set_lgrp_home(lgrp_home_func_t func) { _lgrp_home = func; }
aoqi@0	274	static void set_lgrp_init(lgrp_init_func_t func) { _lgrp_init = func; }
aoqi@0	275	static void set_lgrp_fini(lgrp_fini_func_t func) { _lgrp_fini = func; }
aoqi@0	276	static void set_lgrp_root(lgrp_root_func_t func) { _lgrp_root = func; }
aoqi@0	277	static void set_lgrp_children(lgrp_children_func_t func) { _lgrp_children = func; }
aoqi@0	278	static void set_lgrp_resources(lgrp_resources_func_t func) { _lgrp_resources = func; }
aoqi@0	279	static void set_lgrp_nlgrps(lgrp_nlgrps_func_t func) { _lgrp_nlgrps = func; }
aoqi@0	280	static void set_lgrp_cookie_stale(lgrp_cookie_stale_func_t func) { _lgrp_cookie_stale = func; }
aoqi@0	281	static void set_lgrp_cookie(lgrp_cookie_t cookie) { _lgrp_cookie = cookie; }
aoqi@0	282
aoqi@0	283	static id_t lgrp_home(idtype_t type, id_t id) { return _lgrp_home != NULL ? _lgrp_home(type, id) : -1; }
aoqi@0	284	static lgrp_cookie_t lgrp_init(lgrp_view_t view) { return _lgrp_init != NULL ? _lgrp_init(view) : 0; }
aoqi@0	285	static int lgrp_fini(lgrp_cookie_t cookie) { return _lgrp_fini != NULL ? _lgrp_fini(cookie) : -1; }
aoqi@0	286	static lgrp_id_t lgrp_root(lgrp_cookie_t cookie) { return _lgrp_root != NULL ? _lgrp_root(cookie) : -1; };
aoqi@0	287	static int lgrp_children(lgrp_cookie_t cookie, lgrp_id_t parent,
aoqi@0	288	lgrp_id_t *lgrp_array, uint_t lgrp_array_size) {
aoqi@0	289	return _lgrp_children != NULL ? _lgrp_children(cookie, parent, lgrp_array, lgrp_array_size) : -1;
aoqi@0	290	}
aoqi@0	291	static int lgrp_resources(lgrp_cookie_t cookie, lgrp_id_t lgrp,
aoqi@0	292	lgrp_id_t *lgrp_array, uint_t lgrp_array_size,
aoqi@0	293	lgrp_rsrc_t type) {
aoqi@0	294	return _lgrp_resources != NULL ? _lgrp_resources(cookie, lgrp, lgrp_array, lgrp_array_size, type) : -1;
aoqi@0	295	}
aoqi@0	296
aoqi@0	297	static int lgrp_nlgrps(lgrp_cookie_t cookie) { return _lgrp_nlgrps != NULL ? _lgrp_nlgrps(cookie) : -1; }
aoqi@0	298	static int lgrp_cookie_stale(lgrp_cookie_t cookie) {
aoqi@0	299	return _lgrp_cookie_stale != NULL ? _lgrp_cookie_stale(cookie) : -1;
aoqi@0	300	}
aoqi@0	301	static lgrp_cookie_t lgrp_cookie() { return _lgrp_cookie; }
aoqi@0	302
aoqi@0	303	static bool supports_getisax() { return _getisax != NULL; }
aoqi@0	304	static uint_t getisax(uint32_t* array, uint_t n);
aoqi@0	305
aoqi@0	306	static void set_meminfo(meminfo_func_t func) { _meminfo = func; }
aoqi@0	307	static int meminfo (const uint64_t inaddr[], int addr_count,
aoqi@0	308	const uint_t info_req[], int info_count,
aoqi@0	309	uint64_t outdata[], uint_t validity[]) {
aoqi@0	310	return _meminfo != NULL ? _meminfo(inaddr, addr_count, info_req, info_count,
aoqi@0	311	outdata, validity) : -1;
aoqi@0	312	}
aoqi@0	313
aoqi@0	314	enum {
aoqi@0	315	clear_interrupted = true
aoqi@0	316	};
aoqi@0	317	static void setup_interruptible(JavaThread* thread);
aoqi@0	318	static void setup_interruptible_already_blocked(JavaThread* thread);
aoqi@0	319	static JavaThread* setup_interruptible();
aoqi@0	320	static void cleanup_interruptible(JavaThread* thread);
aoqi@0	321
aoqi@0	322	// perf counter incrementers used by _INTERRUPTIBLE
aoqi@0	323
aoqi@0	324	static void bump_interrupted_before_count();
aoqi@0	325	static void bump_interrupted_during_count();
aoqi@0	326
aoqi@0	327	#ifdef ASSERT
aoqi@0	328	static JavaThread* setup_interruptible_native();
aoqi@0	329	static void cleanup_interruptible_native(JavaThread* thread);
aoqi@0	330	#endif
aoqi@0	331
aoqi@0	332	static sigset_t* unblocked_signals();
aoqi@0	333	static sigset_t* vm_signals();
aoqi@0	334	static sigset_t* allowdebug_blocked_signals();
aoqi@0	335
aoqi@0	336	// %%% Following should be promoted to os.hpp:
aoqi@0	337	// Trace number of created threads
aoqi@0	338	static jint _os_thread_limit;
aoqi@0	339	static volatile jint _os_thread_count;
aoqi@0	340
aoqi@0	341	// Minimum stack size a thread can be created with (allowing
aoqi@0	342	// the VM to completely create the thread and enter user code)
aoqi@0	343
aoqi@0	344	static size_t min_stack_allowed;
aoqi@0	345
aoqi@0	346	// Stack overflow handling
aoqi@0	347
aoqi@0	348	static int max_register_window_saves_before_flushing();
aoqi@0	349
aoqi@0	350	// Stack repair handling
aoqi@0	351
aoqi@0	352	// none present
aoqi@0	353
aoqi@0	354	};
aoqi@0	355
aoqi@0	356	class PlatformEvent : public CHeapObj<mtInternal> {
aoqi@0	357	private:
aoqi@0	358	double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line
aoqi@0	359	volatile int _Event ;
aoqi@0	360	int _nParked ;
aoqi@0	361	int _pipev [2] ;
aoqi@0	362	mutex_t _mutex [1] ;
aoqi@0	363	cond_t _cond [1] ;
aoqi@0	364	double PostPad [2] ;
aoqi@0	365
aoqi@0	366	protected:
aoqi@0	367	// Defining a protected ctor effectively gives us an abstract base class.
aoqi@0	368	// That is, a PlatformEvent can never be instantiated "naked" but only
aoqi@0	369	// as a part of a ParkEvent (recall that ParkEvent extends PlatformEvent).
aoqi@0	370	// TODO-FIXME: make dtor private
aoqi@0	371	~PlatformEvent() { guarantee (0, "invariant") ; }
aoqi@0	372	PlatformEvent() {
aoqi@0	373	int status;
aoqi@0	374	status = os::Solaris::cond_init(_cond);
aoqi@0	375	assert_status(status == 0, status, "cond_init");
aoqi@0	376	status = os::Solaris::mutex_init(_mutex);
aoqi@0	377	assert_status(status == 0, status, "mutex_init");
aoqi@0	378	_Event = 0 ;
aoqi@0	379	_nParked = 0 ;
aoqi@0	380	_pipev[0] = _pipev[1] = -1 ;
aoqi@0	381	}
aoqi@0	382
aoqi@0	383	public:
aoqi@0	384	// Exercise caution using reset() and fired() -- they may require MEMBARs
aoqi@0	385	void reset() { _Event = 0 ; }
aoqi@0	386	int fired() { return _Event; }
aoqi@0	387	void park () ;
aoqi@0	388	int park (jlong millis) ;
aoqi@0	389	int TryPark () ;
aoqi@0	390	void unpark () ;
aoqi@0	391	} ;
aoqi@0	392
aoqi@0	393	class PlatformParker : public CHeapObj<mtInternal> {
aoqi@0	394	protected:
aoqi@0	395	mutex_t _mutex [1] ;
aoqi@0	396	cond_t _cond [1] ;
aoqi@0	397
aoqi@0	398	public: // TODO-FIXME: make dtor private
aoqi@0	399	~PlatformParker() { guarantee (0, "invariant") ; }
aoqi@0	400
aoqi@0	401	public:
aoqi@0	402	PlatformParker() {
aoqi@0	403	int status;
aoqi@0	404	status = os::Solaris::cond_init(_cond);
aoqi@0	405	assert_status(status == 0, status, "cond_init");
aoqi@0	406	status = os::Solaris::mutex_init(_mutex);
aoqi@0	407	assert_status(status == 0, status, "mutex_init");
aoqi@0	408	}
aoqi@0	409	} ;
aoqi@0	410
aoqi@0	411	#endif // OS_SOLARIS_VM_OS_SOLARIS_HPP