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comparison src/os/aix/vm/os_aix.hpp @ 14415:666e6ce3976c
8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
Reviewed-by: kvn
author | simonis |
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date | Fri, 06 Sep 2013 20:16:09 +0200 |
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children | c5e86c5cd22e |
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1 /* | |
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. | |
3 * Copyright 2013 SAP AG. All rights reserved. | |
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 * | |
6 * This code is free software; you can redistribute it and/or modify it | |
7 * under the terms of the GNU General Public License version 2 only, as | |
8 * published by the Free Software Foundation. | |
9 * | |
10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 * version 2 for more details (a copy is included in the LICENSE file that | |
14 * accompanied this code). | |
15 * | |
16 * You should have received a copy of the GNU General Public License version | |
17 * 2 along with this work; if not, write to the Free Software Foundation, | |
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 * | |
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
21 * or visit www.oracle.com if you need additional information or have any | |
22 * questions. | |
23 * | |
24 */ | |
25 | |
26 #ifndef OS_AIX_VM_OS_AIX_HPP | |
27 #define OS_AIX_VM_OS_AIX_HPP | |
28 | |
29 // Information about the protection of the page at address '0' on this os. | |
30 static bool zero_page_read_protected() { return false; } | |
31 | |
32 // Class Aix defines the interface to the Aix operating systems. | |
33 | |
34 class Aix { | |
35 friend class os; | |
36 | |
37 // For signal-chaining | |
38 // highest so far (AIX 5.2) is SIGSAK (63) | |
39 #define MAXSIGNUM 63 | |
40 // length of strings included in the libperfstat structures | |
41 #define IDENTIFIER_LENGTH 64 | |
42 | |
43 static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions | |
44 static unsigned int sigs; // mask of signals that have | |
45 // preinstalled signal handlers | |
46 static bool libjsig_is_loaded; // libjsig that interposes sigaction(), | |
47 // __sigaction(), signal() is loaded | |
48 static struct sigaction *(*get_signal_action)(int); | |
49 static struct sigaction *get_preinstalled_handler(int); | |
50 static void save_preinstalled_handler(int, struct sigaction&); | |
51 | |
52 static void check_signal_handler(int sig); | |
53 | |
54 // For signal flags diagnostics | |
55 static int sigflags[MAXSIGNUM]; | |
56 | |
57 protected: | |
58 | |
59 static julong _physical_memory; | |
60 static pthread_t _main_thread; | |
61 static Mutex* _createThread_lock; | |
62 static int _page_size; | |
63 static int _logical_cpus; | |
64 | |
65 // -1 = uninitialized, 0 = AIX, 1 = OS/400 (PASE) | |
66 static int _on_pase; | |
67 | |
68 // -1 = uninitialized, otherwise 16 bit number: | |
69 // lower 8 bit - minor version | |
70 // higher 8 bit - major version | |
71 // For AIX, e.g. 0x0601 for AIX 6.1 | |
72 // for OS/400 e.g. 0x0504 for OS/400 V5R4 | |
73 static int _os_version; | |
74 | |
75 // -1 = uninitialized, | |
76 // 0 - SPEC1170 not requested (XPG_SUS_ENV is OFF or not set) | |
77 // 1 - SPEC1170 requested (XPG_SUS_ENV is ON) | |
78 static int _xpg_sus_mode; | |
79 | |
80 // -1 = uninitialized, | |
81 // 0 - EXTSHM=OFF or not set | |
82 // 1 - EXTSHM=ON | |
83 static int _extshm; | |
84 | |
85 // page sizes on AIX. | |
86 // | |
87 // AIX supports four different page sizes - 4K, 64K, 16MB, 16GB. The latter two | |
88 // (16M "large" resp. 16G "huge" pages) require special setup and are normally | |
89 // not available. | |
90 // | |
91 // AIX supports multiple page sizes per process, for: | |
92 // - Stack (of the primordial thread, so not relevant for us) | |
93 // - Data - data, bss, heap, for us also pthread stacks | |
94 // - Text - text code | |
95 // - shared memory | |
96 // | |
97 // Default page sizes can be set via linker options (-bdatapsize, -bstacksize, ...) | |
98 // and via environment variable LDR_CNTRL (DATAPSIZE, STACKPSIZE, ...) | |
99 // | |
100 // For shared memory, page size can be set dynamically via shmctl(). Different shared memory | |
101 // regions can have different page sizes. | |
102 // | |
103 // More information can be found at AIBM info center: | |
104 // http://publib.boulder.ibm.com/infocenter/aix/v6r1/index.jsp?topic=/com.ibm.aix.prftungd/doc/prftungd/multiple_page_size_app_support.htm | |
105 // | |
106 // ----- | |
107 // We want to support 4K and 64K and, if the machine is set up correctly, 16MB pages. | |
108 // | |
109 | |
110 // page size of the stack of newly created pthreads | |
111 // (should be LDR_CNTRL DATAPSIZE because stack is allocated on heap by pthread lib) | |
112 static int _stack_page_size; | |
113 | |
114 // Default shm page size. Read: what page size shared memory will be backed | |
115 // with if no page size was set explicitly using shmctl(SHM_PAGESIZE). | |
116 // Should be LDR_CNTRL SHMPSIZE. | |
117 static size_t _shm_default_page_size; | |
118 | |
119 // True if sys V shm can be used with 64K pages dynamically. | |
120 // (via shmctl(.. SHM_PAGESIZE..). Should be true for AIX 53 and | |
121 // newer / PASE V6R1 and newer. (0 or 1, -1 if not initialized) | |
122 static int _can_use_64K_pages; | |
123 | |
124 // True if sys V shm can be used with 16M pages dynamically. | |
125 // (via shmctl(.. SHM_PAGESIZE..). Only true on AIX 5.3 and | |
126 // newer, if the system was set up to use 16M pages and the | |
127 // jvm has enough user rights. (0 or 1, -1 if not initialized) | |
128 static int _can_use_16M_pages; | |
129 | |
130 static julong available_memory(); | |
131 static julong physical_memory() { return _physical_memory; } | |
132 static void initialize_system_info(); | |
133 | |
134 // OS recognitions (PASE/AIX, OS level) call this before calling any | |
135 // one of Aix::on_pase(), Aix::os_version(). | |
136 static void initialize_os_info(); | |
137 | |
138 static int commit_memory_impl(char* addr, size_t bytes, bool exec); | |
139 static int commit_memory_impl(char* addr, size_t bytes, | |
140 size_t alignment_hint, bool exec); | |
141 | |
142 // Scan environment for important settings which might effect the | |
143 // VM. Trace out settings. Warn about invalid settings and/or | |
144 // correct them. | |
145 // | |
146 // Must run after os::Aix::initialue_os_info(). | |
147 static void scan_environment(); | |
148 | |
149 // Retrieve information about multipage size support. Will initialize | |
150 // _page_size, _stack_page_size, _can_use_64K_pages/_can_use_16M_pages | |
151 static void query_multipage_support(); | |
152 | |
153 // Initialize libo4 (on PASE) and libperfstat (on AIX). Call this | |
154 // before relying on functions from either lib, e.g. Aix::get_meminfo(). | |
155 static void initialize_libo4(); | |
156 static void initialize_libperfstat(); | |
157 | |
158 static bool supports_variable_stack_size(); | |
159 | |
160 public: | |
161 static void init_thread_fpu_state(); | |
162 static pthread_t main_thread(void) { return _main_thread; } | |
163 // returns kernel thread id (similar to LWP id on Solaris), which can be | |
164 // used to access /proc | |
165 static pid_t gettid(); | |
166 static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; } | |
167 static Mutex* createThread_lock(void) { return _createThread_lock; } | |
168 static void hotspot_sigmask(Thread* thread); | |
169 | |
170 // Given an address, returns the size of the page backing that address | |
171 static size_t query_pagesize(void* p); | |
172 | |
173 // Return `true' if the calling thread is the primordial thread. The | |
174 // primordial thread is the thread which contains the main function, | |
175 // *not* necessarily the thread which initialized the VM by calling | |
176 // JNI_CreateJavaVM. | |
177 static bool is_primordial_thread(void); | |
178 | |
179 static int page_size(void) { | |
180 assert(_page_size != -1, "not initialized"); | |
181 return _page_size; | |
182 } | |
183 | |
184 // Accessor methods for stack page size which may be different from usual page size. | |
185 static int stack_page_size(void) { | |
186 assert(_stack_page_size != -1, "not initialized"); | |
187 return _stack_page_size; | |
188 } | |
189 | |
190 // default shm page size. Read: what page size shared memory | |
191 // will be backed with if no page size was set explicitly using shmctl(SHM_PAGESIZE). | |
192 // Should be LDR_CNTRL SHMPSIZE. | |
193 static int shm_default_page_size(void) { | |
194 assert(_shm_default_page_size != -1, "not initialized"); | |
195 return _shm_default_page_size; | |
196 } | |
197 | |
198 // Return true if sys V shm can be used with 64K pages dynamically | |
199 // (via shmctl(.. SHM_PAGESIZE..). | |
200 static bool can_use_64K_pages () { | |
201 assert(_can_use_64K_pages != -1, "not initialized"); | |
202 return _can_use_64K_pages == 1 ? true : false; | |
203 } | |
204 | |
205 // Return true if sys V shm can be used with 16M pages dynamically. | |
206 // (via shmctl(.. SHM_PAGESIZE..). | |
207 static bool can_use_16M_pages () { | |
208 assert(_can_use_16M_pages != -1, "not initialized"); | |
209 return _can_use_16M_pages == 1 ? true : false; | |
210 } | |
211 | |
212 static address ucontext_get_pc(ucontext_t* uc); | |
213 static intptr_t* ucontext_get_sp(ucontext_t* uc); | |
214 static intptr_t* ucontext_get_fp(ucontext_t* uc); | |
215 // Set PC into context. Needed for continuation after signal. | |
216 static void ucontext_set_pc(ucontext_t* uc, address pc); | |
217 | |
218 // This boolean allows users to forward their own non-matching signals | |
219 // to JVM_handle_aix_signal, harmlessly. | |
220 static bool signal_handlers_are_installed; | |
221 | |
222 static int get_our_sigflags(int); | |
223 static void set_our_sigflags(int, int); | |
224 static void signal_sets_init(); | |
225 static void install_signal_handlers(); | |
226 static void set_signal_handler(int, bool); | |
227 static bool is_sig_ignored(int sig); | |
228 | |
229 static sigset_t* unblocked_signals(); | |
230 static sigset_t* vm_signals(); | |
231 static sigset_t* allowdebug_blocked_signals(); | |
232 | |
233 // For signal-chaining | |
234 static struct sigaction *get_chained_signal_action(int sig); | |
235 static bool chained_handler(int sig, siginfo_t* siginfo, void* context); | |
236 | |
237 // libpthread version string | |
238 static void libpthread_init(); | |
239 | |
240 // Minimum stack size a thread can be created with (allowing | |
241 // the VM to completely create the thread and enter user code) | |
242 static size_t min_stack_allowed; | |
243 | |
244 // Return default stack size or guard size for the specified thread type | |
245 static size_t default_stack_size(os::ThreadType thr_type); | |
246 static size_t default_guard_size(os::ThreadType thr_type); | |
247 | |
248 // Function returns true if we run on OS/400 (pase), false if we run | |
249 // on AIX. | |
250 static bool on_pase() { | |
251 assert(_on_pase != -1, "not initialized"); | |
252 return _on_pase ? true : false; | |
253 } | |
254 | |
255 // Function returns true if we run on AIX, false if we run on OS/400 | |
256 // (pase). | |
257 static bool on_aix() { | |
258 assert(_on_pase != -1, "not initialized"); | |
259 return _on_pase ? false : true; | |
260 } | |
261 | |
262 // -1 = uninitialized, otherwise 16 bit number: | |
263 // lower 8 bit - minor version | |
264 // higher 8 bit - major version | |
265 // For AIX, e.g. 0x0601 for AIX 6.1 | |
266 // for OS/400 e.g. 0x0504 for OS/400 V5R4 | |
267 static int os_version () { | |
268 assert(_os_version != -1, "not initialized"); | |
269 return _os_version; | |
270 } | |
271 | |
272 // Convenience method: returns true if running on AIX 5.3 or older. | |
273 static bool on_aix_53_or_older() { | |
274 return on_aix() && os_version() <= 0x0503; | |
275 } | |
276 | |
277 // Returns true if we run in SPEC1170 compliant mode (XPG_SUS_ENV=ON). | |
278 static bool xpg_sus_mode() { | |
279 assert(_xpg_sus_mode != -1, "not initialized"); | |
280 return _xpg_sus_mode; | |
281 } | |
282 | |
283 // Returns true if EXTSHM=ON. | |
284 static bool extshm() { | |
285 assert(_extshm != -1, "not initialized"); | |
286 return _extshm; | |
287 } | |
288 | |
289 // result struct for get_meminfo() | |
290 struct meminfo_t { | |
291 | |
292 // Amount of virtual memory (in units of 4 KB pages) | |
293 unsigned long long virt_total; | |
294 | |
295 // Amount of real memory, in bytes | |
296 unsigned long long real_total; | |
297 | |
298 // Amount of free real memory, in bytes | |
299 unsigned long long real_free; | |
300 | |
301 // Total amount of paging space, in bytes | |
302 unsigned long long pgsp_total; | |
303 | |
304 // Amount of free paging space, in bytes | |
305 unsigned long long pgsp_free; | |
306 | |
307 }; | |
308 | |
309 // Result struct for get_cpuinfo(). | |
310 struct cpuinfo_t { | |
311 char description[IDENTIFIER_LENGTH]; // processor description (type/official name) | |
312 u_longlong_t processorHZ; // processor speed in Hz | |
313 int ncpus; // number of active logical processors | |
314 double loadavg[3]; // (1<<SBITS) times the average number of runnables processes during the last 1, 5 and 15 minutes. | |
315 // To calculate the load average, divide the numbers by (1<<SBITS). SBITS is defined in <sys/proc.h>. | |
316 char version[20]; // processor version from _system_configuration (sys/systemcfg.h) | |
317 }; | |
318 | |
319 // Functions to retrieve memory information on AIX, PASE. | |
320 // (on AIX, using libperfstat, on PASE with libo4.so). | |
321 // Returns true if ok, false if error. | |
322 static bool get_meminfo(meminfo_t* pmi); | |
323 | |
324 // Function to retrieve cpu information on AIX | |
325 // (on AIX, using libperfstat) | |
326 // Returns true if ok, false if error. | |
327 static bool get_cpuinfo(cpuinfo_t* pci); | |
328 | |
329 }; // os::Aix class | |
330 | |
331 | |
332 class PlatformEvent : public CHeapObj<mtInternal> { | |
333 private: | |
334 double CachePad [4]; // increase odds that _mutex is sole occupant of cache line | |
335 volatile int _Event; | |
336 volatile int _nParked; | |
337 pthread_mutex_t _mutex [1]; | |
338 pthread_cond_t _cond [1]; | |
339 double PostPad [2]; | |
340 Thread * _Assoc; | |
341 | |
342 public: // TODO-FIXME: make dtor private | |
343 ~PlatformEvent() { guarantee (0, "invariant"); } | |
344 | |
345 public: | |
346 PlatformEvent() { | |
347 int status; | |
348 status = pthread_cond_init (_cond, NULL); | |
349 assert_status(status == 0, status, "cond_init"); | |
350 status = pthread_mutex_init (_mutex, NULL); | |
351 assert_status(status == 0, status, "mutex_init"); | |
352 _Event = 0; | |
353 _nParked = 0; | |
354 _Assoc = NULL; | |
355 } | |
356 | |
357 // Use caution with reset() and fired() -- they may require MEMBARs | |
358 void reset() { _Event = 0; } | |
359 int fired() { return _Event; } | |
360 void park (); | |
361 void unpark (); | |
362 int TryPark (); | |
363 int park (jlong millis); | |
364 void SetAssociation (Thread * a) { _Assoc = a; } | |
365 }; | |
366 | |
367 class PlatformParker : public CHeapObj<mtInternal> { | |
368 protected: | |
369 pthread_mutex_t _mutex [1]; | |
370 pthread_cond_t _cond [1]; | |
371 | |
372 public: // TODO-FIXME: make dtor private | |
373 ~PlatformParker() { guarantee (0, "invariant"); } | |
374 | |
375 public: | |
376 PlatformParker() { | |
377 int status; | |
378 status = pthread_cond_init (_cond, NULL); | |
379 assert_status(status == 0, status, "cond_init"); | |
380 status = pthread_mutex_init (_mutex, NULL); | |
381 assert_status(status == 0, status, "mutex_init"); | |
382 } | |
383 }; | |
384 | |
385 #endif // OS_AIX_VM_OS_AIX_HPP |