Mercurial > hg > truffle
comparison src/os/bsd/vm/os_bsd.hpp @ 3960:f08d439fab8c
7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
author | never |
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date | Sun, 25 Sep 2011 16:03:29 -0700 |
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children | d2a62e0f25eb |
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1 /* | |
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 * | |
23 */ | |
24 | |
25 #ifndef OS_BSD_VM_OS_BSD_HPP | |
26 #define OS_BSD_VM_OS_BSD_HPP | |
27 | |
28 // Bsd_OS defines the interface to Bsd operating systems | |
29 | |
30 /* pthread_getattr_np comes with BsdThreads-0.9-7 on RedHat 7.1 */ | |
31 typedef int (*pthread_getattr_func_type) (pthread_t, pthread_attr_t *); | |
32 | |
33 #ifdef __APPLE__ | |
34 // Mac OS X doesn't support clock_gettime. Stub out the type, it is | |
35 // unused | |
36 typedef int clockid_t; | |
37 #endif | |
38 | |
39 class Bsd { | |
40 friend class os; | |
41 | |
42 // For signal-chaining | |
43 #define MAXSIGNUM 32 | |
44 static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions | |
45 static unsigned int sigs; // mask of signals that have | |
46 // preinstalled signal handlers | |
47 static bool libjsig_is_loaded; // libjsig that interposes sigaction(), | |
48 // __sigaction(), signal() is loaded | |
49 static struct sigaction *(*get_signal_action)(int); | |
50 static struct sigaction *get_preinstalled_handler(int); | |
51 static void save_preinstalled_handler(int, struct sigaction&); | |
52 | |
53 static void check_signal_handler(int sig); | |
54 | |
55 // For signal flags diagnostics | |
56 static int sigflags[MAXSIGNUM]; | |
57 | |
58 static int (*_clock_gettime)(clockid_t, struct timespec *); | |
59 #ifndef _ALLBSD_SOURCE | |
60 static int (*_pthread_getcpuclockid)(pthread_t, clockid_t *); | |
61 | |
62 static address _initial_thread_stack_bottom; | |
63 static uintptr_t _initial_thread_stack_size; | |
64 | |
65 static const char *_glibc_version; | |
66 static const char *_libpthread_version; | |
67 | |
68 static bool _is_floating_stack; | |
69 static bool _is_NPTL; | |
70 static bool _supports_fast_thread_cpu_time; | |
71 #endif | |
72 | |
73 static GrowableArray<int>* _cpu_to_node; | |
74 | |
75 protected: | |
76 | |
77 static julong _physical_memory; | |
78 static pthread_t _main_thread; | |
79 #ifndef _ALLBSD_SOURCE | |
80 static Mutex* _createThread_lock; | |
81 #endif | |
82 static int _page_size; | |
83 | |
84 static julong available_memory(); | |
85 static julong physical_memory() { return _physical_memory; } | |
86 static void initialize_system_info(); | |
87 | |
88 #ifndef _ALLBSD_SOURCE | |
89 static void set_glibc_version(const char *s) { _glibc_version = s; } | |
90 static void set_libpthread_version(const char *s) { _libpthread_version = s; } | |
91 #endif | |
92 | |
93 static bool supports_variable_stack_size(); | |
94 | |
95 #ifndef _ALLBSD_SOURCE | |
96 static void set_is_NPTL() { _is_NPTL = true; } | |
97 static void set_is_BsdThreads() { _is_NPTL = false; } | |
98 static void set_is_floating_stack() { _is_floating_stack = true; } | |
99 #endif | |
100 | |
101 static void rebuild_cpu_to_node_map(); | |
102 static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; } | |
103 | |
104 static bool hugetlbfs_sanity_check(bool warn, size_t page_size); | |
105 | |
106 public: | |
107 | |
108 static void init_thread_fpu_state(); | |
109 #ifndef _ALLBSD_SOURCE | |
110 static int get_fpu_control_word(); | |
111 static void set_fpu_control_word(int fpu_control); | |
112 #endif | |
113 static pthread_t main_thread(void) { return _main_thread; } | |
114 | |
115 #ifndef _ALLBSD_SOURCE | |
116 // returns kernel thread id (similar to LWP id on Solaris), which can be | |
117 // used to access /proc | |
118 static pid_t gettid(); | |
119 static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; } | |
120 static Mutex* createThread_lock(void) { return _createThread_lock; } | |
121 #endif | |
122 static void hotspot_sigmask(Thread* thread); | |
123 | |
124 #ifndef _ALLBSD_SOURCE | |
125 static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; } | |
126 static uintptr_t initial_thread_stack_size(void) { return _initial_thread_stack_size; } | |
127 #endif | |
128 static bool is_initial_thread(void); | |
129 | |
130 static int page_size(void) { return _page_size; } | |
131 static void set_page_size(int val) { _page_size = val; } | |
132 | |
133 static address ucontext_get_pc(ucontext_t* uc); | |
134 static intptr_t* ucontext_get_sp(ucontext_t* uc); | |
135 static intptr_t* ucontext_get_fp(ucontext_t* uc); | |
136 | |
137 // For Analyzer Forte AsyncGetCallTrace profiling support: | |
138 // | |
139 // This interface should be declared in os_bsd_i486.hpp, but | |
140 // that file provides extensions to the os class and not the | |
141 // Bsd class. | |
142 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc, | |
143 intptr_t** ret_sp, intptr_t** ret_fp); | |
144 | |
145 // This boolean allows users to forward their own non-matching signals | |
146 // to JVM_handle_bsd_signal, harmlessly. | |
147 static bool signal_handlers_are_installed; | |
148 | |
149 static int get_our_sigflags(int); | |
150 static void set_our_sigflags(int, int); | |
151 static void signal_sets_init(); | |
152 static void install_signal_handlers(); | |
153 static void set_signal_handler(int, bool); | |
154 static bool is_sig_ignored(int sig); | |
155 | |
156 static sigset_t* unblocked_signals(); | |
157 static sigset_t* vm_signals(); | |
158 static sigset_t* allowdebug_blocked_signals(); | |
159 | |
160 // For signal-chaining | |
161 static struct sigaction *get_chained_signal_action(int sig); | |
162 static bool chained_handler(int sig, siginfo_t* siginfo, void* context); | |
163 | |
164 #ifndef _ALLBSD_SOURCE | |
165 // GNU libc and libpthread version strings | |
166 static const char *glibc_version() { return _glibc_version; } | |
167 static const char *libpthread_version() { return _libpthread_version; } | |
168 | |
169 // NPTL or BsdThreads? | |
170 static bool is_BsdThreads() { return !_is_NPTL; } | |
171 static bool is_NPTL() { return _is_NPTL; } | |
172 | |
173 // NPTL is always floating stack. BsdThreads could be using floating | |
174 // stack or fixed stack. | |
175 static bool is_floating_stack() { return _is_floating_stack; } | |
176 | |
177 static void libpthread_init(); | |
178 static bool libnuma_init(); | |
179 static void* libnuma_dlsym(void* handle, const char* name); | |
180 #endif | |
181 // Minimum stack size a thread can be created with (allowing | |
182 // the VM to completely create the thread and enter user code) | |
183 static size_t min_stack_allowed; | |
184 | |
185 // Return default stack size or guard size for the specified thread type | |
186 static size_t default_stack_size(os::ThreadType thr_type); | |
187 static size_t default_guard_size(os::ThreadType thr_type); | |
188 | |
189 #ifndef _ALLBSD_SOURCE | |
190 static void capture_initial_stack(size_t max_size); | |
191 | |
192 // Stack overflow handling | |
193 static bool manually_expand_stack(JavaThread * t, address addr); | |
194 static int max_register_window_saves_before_flushing(); | |
195 #endif | |
196 | |
197 // Real-time clock functions | |
198 static void clock_init(void); | |
199 | |
200 #ifndef _ALLBSD_SOURCE | |
201 // fast POSIX clocks support | |
202 static void fast_thread_clock_init(void); | |
203 #endif | |
204 | |
205 static bool supports_monotonic_clock() { | |
206 return _clock_gettime != NULL; | |
207 } | |
208 | |
209 static int clock_gettime(clockid_t clock_id, struct timespec *tp) { | |
210 return _clock_gettime ? _clock_gettime(clock_id, tp) : -1; | |
211 } | |
212 | |
213 #ifndef _ALLBSD_SOURCE | |
214 static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) { | |
215 return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1; | |
216 } | |
217 | |
218 static bool supports_fast_thread_cpu_time() { | |
219 return _supports_fast_thread_cpu_time; | |
220 } | |
221 | |
222 static jlong fast_thread_cpu_time(clockid_t clockid); | |
223 #endif | |
224 | |
225 // Stack repair handling | |
226 | |
227 // none present | |
228 | |
229 // BsdThreads work-around for 6292965 | |
230 static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime); | |
231 | |
232 | |
233 // Bsd suspend/resume support - this helper is a shadow of its former | |
234 // self now that low-level suspension is barely used, and old workarounds | |
235 // for BsdThreads are no longer needed. | |
236 class SuspendResume { | |
237 private: | |
238 volatile int _suspend_action; | |
239 // values for suspend_action: | |
240 #define SR_NONE (0x00) | |
241 #define SR_SUSPEND (0x01) // suspend request | |
242 #define SR_CONTINUE (0x02) // resume request | |
243 | |
244 volatile jint _state; | |
245 // values for _state: + SR_NONE | |
246 #define SR_SUSPENDED (0x20) | |
247 public: | |
248 SuspendResume() { _suspend_action = SR_NONE; _state = SR_NONE; } | |
249 | |
250 int suspend_action() const { return _suspend_action; } | |
251 void set_suspend_action(int x) { _suspend_action = x; } | |
252 | |
253 // atomic updates for _state | |
254 void set_suspended() { | |
255 jint temp, temp2; | |
256 do { | |
257 temp = _state; | |
258 temp2 = Atomic::cmpxchg(temp | SR_SUSPENDED, &_state, temp); | |
259 } while (temp2 != temp); | |
260 } | |
261 void clear_suspended() { | |
262 jint temp, temp2; | |
263 do { | |
264 temp = _state; | |
265 temp2 = Atomic::cmpxchg(temp & ~SR_SUSPENDED, &_state, temp); | |
266 } while (temp2 != temp); | |
267 } | |
268 bool is_suspended() { return _state & SR_SUSPENDED; } | |
269 | |
270 #undef SR_SUSPENDED | |
271 }; | |
272 | |
273 private: | |
274 typedef int (*sched_getcpu_func_t)(void); | |
275 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen); | |
276 typedef int (*numa_max_node_func_t)(void); | |
277 typedef int (*numa_available_func_t)(void); | |
278 typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node); | |
279 typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask); | |
280 | |
281 static sched_getcpu_func_t _sched_getcpu; | |
282 static numa_node_to_cpus_func_t _numa_node_to_cpus; | |
283 static numa_max_node_func_t _numa_max_node; | |
284 static numa_available_func_t _numa_available; | |
285 static numa_tonode_memory_func_t _numa_tonode_memory; | |
286 static numa_interleave_memory_func_t _numa_interleave_memory; | |
287 static unsigned long* _numa_all_nodes; | |
288 | |
289 static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; } | |
290 static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; } | |
291 static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; } | |
292 static void set_numa_available(numa_available_func_t func) { _numa_available = func; } | |
293 static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; } | |
294 static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; } | |
295 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; } | |
296 public: | |
297 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; } | |
298 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) { | |
299 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1; | |
300 } | |
301 static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; } | |
302 static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; } | |
303 static int numa_tonode_memory(void *start, size_t size, int node) { | |
304 return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1; | |
305 } | |
306 static void numa_interleave_memory(void *start, size_t size) { | |
307 if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) { | |
308 _numa_interleave_memory(start, size, _numa_all_nodes); | |
309 } | |
310 } | |
311 static int get_node_by_cpu(int cpu_id); | |
312 }; | |
313 | |
314 | |
315 class PlatformEvent : public CHeapObj { | |
316 private: | |
317 double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line | |
318 volatile int _Event ; | |
319 volatile int _nParked ; | |
320 pthread_mutex_t _mutex [1] ; | |
321 pthread_cond_t _cond [1] ; | |
322 double PostPad [2] ; | |
323 Thread * _Assoc ; | |
324 | |
325 public: // TODO-FIXME: make dtor private | |
326 ~PlatformEvent() { guarantee (0, "invariant") ; } | |
327 | |
328 public: | |
329 PlatformEvent() { | |
330 int status; | |
331 status = pthread_cond_init (_cond, NULL); | |
332 assert_status(status == 0, status, "cond_init"); | |
333 status = pthread_mutex_init (_mutex, NULL); | |
334 assert_status(status == 0, status, "mutex_init"); | |
335 _Event = 0 ; | |
336 _nParked = 0 ; | |
337 _Assoc = NULL ; | |
338 } | |
339 | |
340 // Use caution with reset() and fired() -- they may require MEMBARs | |
341 void reset() { _Event = 0 ; } | |
342 int fired() { return _Event; } | |
343 void park () ; | |
344 void unpark () ; | |
345 int TryPark () ; | |
346 int park (jlong millis) ; | |
347 void SetAssociation (Thread * a) { _Assoc = a ; } | |
348 } ; | |
349 | |
350 class PlatformParker : public CHeapObj { | |
351 protected: | |
352 pthread_mutex_t _mutex [1] ; | |
353 pthread_cond_t _cond [1] ; | |
354 | |
355 public: // TODO-FIXME: make dtor private | |
356 ~PlatformParker() { guarantee (0, "invariant") ; } | |
357 | |
358 public: | |
359 PlatformParker() { | |
360 int status; | |
361 status = pthread_cond_init (_cond, NULL); | |
362 assert_status(status == 0, status, "cond_init"); | |
363 status = pthread_mutex_init (_mutex, NULL); | |
364 assert_status(status == 0, status, "mutex_init"); | |
365 } | |
366 } ; | |
367 | |
368 #endif // OS_BSD_VM_OS_BSD_HPP |