1 #ifdef USE_PRAGMA_IDENT_HDR
2 #pragma ident "@(#)os_solaris.hpp 1.121 07/06/29 04:05:00 JVM"
3 #endif
4 /*
5 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7 *
8 * This code is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 only, as
10 * published by the Free Software Foundation.
11 *
12 * This code is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * version 2 for more details (a copy is included in the LICENSE file that
16 * accompanied this code).
17 *
18 * You should have received a copy of the GNU General Public License version
19 * 2 along with this work; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
24 * have any questions.
25 *
26 */
27
28 // Solaris_OS defines the interface to Solaris operating systems
29
30 class Solaris {
31 friend class os;
32
33 private:
34
35 // Support for "new" libthread APIs for getting & setting thread context (2.8)
36 #define TRS_VALID 0
37 #define TRS_NONVOLATILE 1
38 #define TRS_LWPID 2
39 #define TRS_INVALID 3
40
41 // _T2_libthread is true if we believe we are running with the newer
42 // SunSoft lib/lwp/libthread: default Solaris 9, available Solaris 8
43 // which is a lightweight libthread that also supports all T1
44 static bool _T2_libthread;
45 // These refer to new libthread interface functions
46 // They get intialized if we dynamically detect new libthread
47 static int_fnP_thread_t_iP_uP_stack_tP_gregset_t _thr_getstate;
48 static int_fnP_thread_t_i_gregset_t _thr_setstate;
49 static int_fnP_thread_t_i _thr_setmutator;
50 static int_fnP_thread_t _thr_suspend_mutator;
51 static int_fnP_thread_t _thr_continue_mutator;
52 // libthread_init sets the above, if the new functionality is detected
53
54 // initialized to libthread or lwp synchronization primitives depending on UseLWPSychronization
55 static int_fnP_mutex_tP _mutex_lock;
56 static int_fnP_mutex_tP _mutex_trylock;
57 static int_fnP_mutex_tP _mutex_unlock;
58 static int_fnP_mutex_tP_i_vP _mutex_init;
59 static int_fnP_mutex_tP _mutex_destroy;
60 static int _mutex_scope;
61
62 static int_fnP_cond_tP_mutex_tP_timestruc_tP _cond_timedwait;
63 static int_fnP_cond_tP_mutex_tP _cond_wait;
64 static int_fnP_cond_tP _cond_signal;
65 static int_fnP_cond_tP _cond_broadcast;
66 static int_fnP_cond_tP_i_vP _cond_init;
67 static int_fnP_cond_tP _cond_destroy;
68 static int _cond_scope;
69
70 typedef uintptr_t lgrp_cookie_t;
71 typedef id_t lgrp_id_t;
72 typedef enum lgrp_view {
73 LGRP_VIEW_CALLER, /* what's available to the caller */
74 LGRP_VIEW_OS /* what's available to operating system */
75 } lgrp_view_t;
76
77 typedef lgrp_id_t (*lgrp_home_func_t)(idtype_t idtype, id_t id);
78 typedef lgrp_cookie_t (*lgrp_init_func_t)(lgrp_view_t view);
79 typedef int (*lgrp_fini_func_t)(lgrp_cookie_t cookie);
80 typedef lgrp_id_t (*lgrp_root_func_t)(lgrp_cookie_t cookie);
81 typedef int (*lgrp_children_func_t)(lgrp_cookie_t cookie, lgrp_id_t parent,
82 lgrp_id_t *lgrp_array, uint_t lgrp_array_size);
83 typedef int (*lgrp_nlgrps_func_t)(lgrp_cookie_t cookie);
84 typedef int (*lgrp_cookie_stale_func_t)(lgrp_cookie_t cookie);
85 typedef int (*meminfo_func_t)(const uint64_t inaddr[], int addr_count,
86 const uint_t info_req[], int info_count,
87 uint64_t outdata[], uint_t validity[]);
88
89 static lgrp_home_func_t _lgrp_home;
90 static lgrp_init_func_t _lgrp_init;
91 static lgrp_fini_func_t _lgrp_fini;
92 static lgrp_root_func_t _lgrp_root;
93 static lgrp_children_func_t _lgrp_children;
94 static lgrp_nlgrps_func_t _lgrp_nlgrps;
95 static lgrp_cookie_stale_func_t _lgrp_cookie_stale;
96 static lgrp_cookie_t _lgrp_cookie;
97
98 static meminfo_func_t _meminfo;
99
100 // Large Page Support--mpss.
101 static bool set_mpss_range(caddr_t start, size_t bytes, size_t align);
102
103 static void init_thread_fpu_state(void);
104
105 static void try_enable_extended_io();
106
107 // For signal-chaining
108 static unsigned long sigs; // mask of signals that have
109 // preinstalled signal handlers
110 static struct sigaction *(*get_signal_action)(int);
111 static struct sigaction *get_preinstalled_handler(int);
112 static int (*get_libjsig_version)();
113 static void save_preinstalled_handler(int, struct sigaction&);
114 static void check_signal_handler(int sig);
115
116 // For overridable signals
117 static int _SIGinterrupt; // user-overridable INTERRUPT_SIGNAL
118 static int _SIGasync; // user-overridable ASYNC_SIGNAL
119 static void set_SIGinterrupt(int newsig) { _SIGinterrupt = newsig; }
120 static void set_SIGasync(int newsig) { _SIGasync = newsig; }
121
122
123 public:
124 // Large Page Support--ISM.
125 static bool largepage_range(char* addr, size_t size);
126
127 static int SIGinterrupt() { return _SIGinterrupt; }
128 static int SIGasync() { return _SIGasync; }
129 static address handler_start, handler_end; // start and end pc of thr_sighndlrinfo
130
131 static bool valid_stack_address(Thread* thread, address sp);
132 static bool valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect);
133 static ucontext_t* get_valid_uc_in_signal_handler(Thread* thread,
134 ucontext_t* uc);
135
136 static ExtendedPC ucontext_get_ExtendedPC(ucontext_t* uc);
137 static intptr_t* ucontext_get_sp(ucontext_t* uc);
138 // ucontext_get_fp() is only used by Solaris X86 (see note below)
139 static intptr_t* ucontext_get_fp(ucontext_t* uc);
140
141 // For Analyzer Forte AsyncGetCallTrace profiling support:
142 // Parameter ret_fp is only used by Solaris X86.
143 //
144 // We should have different declarations of this interface in
145 // os_solaris_i486.hpp and os_solaris_sparc.hpp, but that file
146 // provides extensions to the os class and not the Solaris class.
147 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc,
148 intptr_t** ret_sp, intptr_t** ret_fp);
149
150 static void hotspot_sigmask(Thread* thread);
151
152 protected:
153 // Solaris-specific interface goes here
154 static julong available_memory();
155 static julong physical_memory() { return _physical_memory; }
156 static julong _physical_memory;
157 static void initialize_system_info();
158 static int _dev_zero_fd;
159 static int get_dev_zero_fd() { return _dev_zero_fd; }
160 static void set_dev_zero_fd(int fd) { _dev_zero_fd = fd; }
161 static char* mmap_chunk(char *addr, size_t size, int flags, int prot);
162 static bool mpss_sanity_check(bool warn, size_t * page_size);
163 static bool ism_sanity_check (bool warn, size_t * page_size);
164
165 // Workaround for 4352906. thr_stksegment sometimes returns
166 // a bad value for the primordial thread's stack base when
167 // it is called more than one time.
168 // Workaround is to cache the initial value to avoid further
169 // calls to thr_stksegment.
170 // It appears that someone (Hotspot?) is trashing the user's
171 // proc_t structure (note that this is a system struct).
172 static address _main_stack_base;
173
174 public:
175 static void libthread_init();
176 static void synchronization_init();
177 static void liblgrp_init();
178 // Load miscellaneous symbols.
179 static void misc_sym_init();
180 // This boolean allows users to forward their own non-matching signals
181 // to JVM_handle_solaris_signal, harmlessly.
182 static bool signal_handlers_are_installed;
183
184 static void signal_sets_init();
185 static void install_signal_handlers();
186 static void set_signal_handler(int sig, bool set_installed, bool oktochain);
187 static void init_signal_mem();
188 static bool is_sig_ignored(int sig);
189 static void set_our_sigflags(int, int);
190 static int get_our_sigflags(int);
191
192 // For signal-chaining
193 static bool libjsig_is_loaded; // libjsig that interposes sigaction(),
194 // signal(), sigset() is loaded
195 static struct sigaction *get_chained_signal_action(int sig);
196 static bool chained_handler(int sig, siginfo_t *siginfo, void *context);
197
198 // The following allow us to link against both the old and new libthread (2.8)
199 // and exploit the new libthread functionality if available.
200
201 static bool T2_libthread() { return _T2_libthread; }
202 static void set_T2_libthread(bool T2_libthread) { _T2_libthread = T2_libthread; }
203
204 static int thr_getstate(thread_t tid, int *flag, unsigned *lwp, stack_t *ss, gregset_t rs)
205 { return _thr_getstate(tid, flag, lwp, ss, rs); }
206 static void set_thr_getstate(int_fnP_thread_t_iP_uP_stack_tP_gregset_t func)
207 { _thr_getstate = func; }
208
209 static int thr_setstate(thread_t tid, int flag, gregset_t rs) { return _thr_setstate(tid, flag, rs); }
210 static void set_thr_setstate(int_fnP_thread_t_i_gregset_t func) { _thr_setstate = func; }
211
212 static int thr_setmutator(thread_t tid, int enabled) { return _thr_setmutator(tid, enabled); }
213 static void set_thr_setmutator(int_fnP_thread_t_i func) { _thr_setmutator = func; }
214
215 static int thr_suspend_mutator(thread_t tid) { return _thr_suspend_mutator(tid); }
216 static void set_thr_suspend_mutator(int_fnP_thread_t func) { _thr_suspend_mutator = func; }
217
218 static int thr_continue_mutator(thread_t tid) { return _thr_continue_mutator(tid); }
219 static void set_thr_continue_mutator(int_fnP_thread_t func) { _thr_continue_mutator = func; }
220
221 // Allows us to switch between lwp and thread -based synchronization
222 static int mutex_lock(mutex_t *mx) { return _mutex_lock(mx); }
223 static int mutex_trylock(mutex_t *mx) { return _mutex_trylock(mx); }
224 static int mutex_unlock(mutex_t *mx) { return _mutex_unlock(mx); }
225 static int mutex_init(mutex_t *mx) { return _mutex_init(mx, os::Solaris::mutex_scope(), NULL); }
226 static int mutex_destroy(mutex_t *mx) { return _mutex_destroy(mx); }
227 static int mutex_scope() { return _mutex_scope; }
228
229 static void set_mutex_lock(int_fnP_mutex_tP func) { _mutex_lock = func; }
230 static void set_mutex_trylock(int_fnP_mutex_tP func) { _mutex_trylock = func; }
231 static void set_mutex_unlock(int_fnP_mutex_tP func) { _mutex_unlock = func; }
232 static void set_mutex_init(int_fnP_mutex_tP_i_vP func) { _mutex_init = func; }
233 static void set_mutex_destroy(int_fnP_mutex_tP func) { _mutex_destroy = func; }
234 static void set_mutex_scope(int scope) { _mutex_scope = scope; }
235
236 static int cond_timedwait(cond_t *cv, mutex_t *mx, timestruc_t *abst)
237 { return _cond_timedwait(cv, mx, abst); }
238 static int cond_wait(cond_t *cv, mutex_t *mx) { return _cond_wait(cv, mx); }
239 static int cond_signal(cond_t *cv) { return _cond_signal(cv); }
240 static int cond_broadcast(cond_t *cv) { return _cond_broadcast(cv); }
241 static int cond_init(cond_t *cv) { return _cond_init(cv, os::Solaris::cond_scope(), NULL); }
242 static int cond_destroy(cond_t *cv) { return _cond_destroy(cv); }
243 static int cond_scope() { return _cond_scope; }
244
245 static void set_cond_timedwait(int_fnP_cond_tP_mutex_tP_timestruc_tP func)
246 { _cond_timedwait = func; }
247 static void set_cond_wait(int_fnP_cond_tP_mutex_tP func) { _cond_wait = func; }
248 static void set_cond_signal(int_fnP_cond_tP func) { _cond_signal = func; }
249 static void set_cond_broadcast(int_fnP_cond_tP func) { _cond_broadcast = func; }
250 static void set_cond_init(int_fnP_cond_tP_i_vP func) { _cond_init = func; }
251 static void set_cond_destroy(int_fnP_cond_tP func) { _cond_destroy = func; }
252 static void set_cond_scope(int scope) { _cond_scope = scope; }
253
254 static void set_lgrp_home(lgrp_home_func_t func) { _lgrp_home = func; }
255 static void set_lgrp_init(lgrp_init_func_t func) { _lgrp_init = func; }
256 static void set_lgrp_fini(lgrp_fini_func_t func) { _lgrp_fini = func; }
257 static void set_lgrp_root(lgrp_root_func_t func) { _lgrp_root = func; }
258 static void set_lgrp_children(lgrp_children_func_t func) { _lgrp_children = func; }
259 static void set_lgrp_nlgrps(lgrp_nlgrps_func_t func) { _lgrp_nlgrps = func; }
260 static void set_lgrp_cookie_stale(lgrp_cookie_stale_func_t func) { _lgrp_cookie_stale = func; }
261 static void set_lgrp_cookie(lgrp_cookie_t cookie) { _lgrp_cookie = cookie; }
262
263 static id_t lgrp_home(idtype_t type, id_t id) { return _lgrp_home != NULL ? _lgrp_home(type, id) : -1; }
264 static lgrp_cookie_t lgrp_init(lgrp_view_t view) { return _lgrp_init != NULL ? _lgrp_init(view) : 0; }
265 static int lgrp_fini(lgrp_cookie_t cookie) { return _lgrp_fini != NULL ? _lgrp_fini(cookie) : -1; }
266 static lgrp_id_t lgrp_root(lgrp_cookie_t cookie) { return _lgrp_root != NULL ? _lgrp_root(cookie) : -1; };
267 static int lgrp_children(lgrp_cookie_t cookie, lgrp_id_t parent,
268 lgrp_id_t *lgrp_array, uint_t lgrp_array_size) {
269 return _lgrp_children != NULL ? _lgrp_children(cookie, parent, lgrp_array, lgrp_array_size) : -1;
270 }
271 static int lgrp_nlgrps(lgrp_cookie_t cookie) { return _lgrp_nlgrps != NULL ? _lgrp_nlgrps(cookie) : -1; }
272 static int lgrp_cookie_stale(lgrp_cookie_t cookie) {
273 return _lgrp_cookie_stale != NULL ? _lgrp_cookie_stale(cookie) : -1;
274 }
275 static lgrp_cookie_t lgrp_cookie() { return _lgrp_cookie; }
276
277 static void set_meminfo(meminfo_func_t func) { _meminfo = func; }
278 static int meminfo (const uint64_t inaddr[], int addr_count,
279 const uint_t info_req[], int info_count,
280 uint64_t outdata[], uint_t validity[]) {
281 return _meminfo != NULL ? _meminfo(inaddr, addr_count, info_req, info_count,
282 outdata, validity) : -1;
283 }
284
285 enum {
286 clear_interrupted = true
287 };
288 static void setup_interruptible(JavaThread* thread);
289 static void setup_interruptible_already_blocked(JavaThread* thread);
290 static JavaThread* setup_interruptible();
291 static void cleanup_interruptible(JavaThread* thread);
292
293 // perf counter incrementers used by _INTERRUPTIBLE
294
295 static void bump_interrupted_before_count();
296 static void bump_interrupted_during_count();
297
298 #ifdef ASSERT
299 static JavaThread* setup_interruptible_native();
300 static void cleanup_interruptible_native(JavaThread* thread);
301 #endif
302
303 static sigset_t* unblocked_signals();
304 static sigset_t* vm_signals();
305 static sigset_t* allowdebug_blocked_signals();
306
307 // %%% Following should be promoted to os.hpp:
308 // Trace number of created threads
309 static jint _os_thread_limit;
310 static volatile jint _os_thread_count;
311
312 // Minimum stack size a thread can be created with (allowing
313 // the VM to completely create the thread and enter user code)
314
315 static size_t min_stack_allowed;
316
317 // Stack overflow handling
318
319 static int max_register_window_saves_before_flushing();
320
321 // Stack repair handling
322
323 // none present
324
325 };
326
327 class PlatformEvent : public CHeapObj {
328 private:
329 double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line
330 volatile int _Event ;
331 int _nParked ;
332 int _pipev [2] ;
333 mutex_t _mutex [1] ;
334 cond_t _cond [1] ;
335 double PostPad [2] ;
336
337 protected:
338 // Defining a protected ctor effectively gives us an abstract base class.
339 // That is, a PlatformEvent can never be instantiated "naked" but only
340 // as a part of a ParkEvent (recall that ParkEvent extends PlatformEvent).
341 // TODO-FIXME: make dtor private
342 ~PlatformEvent() { guarantee (0, "invariant") ; }
343 PlatformEvent() {
344 int status;
345 status = os::Solaris::cond_init(_cond);
346 assert_status(status == 0, status, "cond_init");
347 status = os::Solaris::mutex_init(_mutex);
348 assert_status(status == 0, status, "mutex_init");
349 _Event = 0 ;
350 _nParked = 0 ;
351 _pipev[0] = _pipev[1] = -1 ;
352 }
353
354 public:
355 // Exercise caution using reset() and fired() -- they may require MEMBARs
356 void reset() { _Event = 0 ; }
357 int fired() { return _Event; }
358 void park () ;
359 int park (jlong millis) ;
360 int TryPark () ;
361 void unpark () ;
362 } ;
363
364 class PlatformParker : public CHeapObj {
365 protected:
366 mutex_t _mutex [1] ;
367 cond_t _cond [1] ;
368
369 public: // TODO-FIXME: make dtor private
370 ~PlatformParker() { guarantee (0, "invariant") ; }
371
372 public:
373 PlatformParker() {
374 int status;
375 status = os::Solaris::cond_init(_cond);
376 assert_status(status == 0, status, "cond_init");
377 status = os::Solaris::mutex_init(_mutex);
378 assert_status(status == 0, status, "mutex_init");
379 }
380 } ;
381
382
383
384
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386