Mercurial > hg > truffle
annotate src/share/vm/runtime/os.hpp @ 5274:e72dd6533eb9
documented importance of nmethod::_graal_compiled_method wrt code unloading and GC
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 23 Apr 2012 15:42:30 +0200 |
parents | 897b7d18bebc |
children | 957c266d8bc5 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_RUNTIME_OS_HPP |
26 #define SHARE_VM_RUNTIME_OS_HPP | |
27 | |
28 #include "jvmtifiles/jvmti.h" | |
29 #include "runtime/atomic.hpp" | |
30 #include "runtime/extendedPC.hpp" | |
31 #include "runtime/handles.hpp" | |
32 #include "utilities/top.hpp" | |
33 #ifdef TARGET_OS_FAMILY_linux | |
34 # include "jvm_linux.h" | |
35 #endif | |
36 #ifdef TARGET_OS_FAMILY_solaris | |
37 # include "jvm_solaris.h" | |
38 #endif | |
39 #ifdef TARGET_OS_FAMILY_windows | |
40 # include "jvm_windows.h" | |
41 #endif | |
3960 | 42 #ifdef TARGET_OS_FAMILY_bsd |
43 # include "jvm_bsd.h" | |
44 #endif | |
1972 | 45 |
0 | 46 // os defines the interface to operating system; this includes traditional |
47 // OS services (time, I/O) as well as other functionality with system- | |
48 // dependent code. | |
49 | |
50 typedef void (*dll_func)(...); | |
51 | |
52 class Thread; | |
53 class JavaThread; | |
54 class Event; | |
55 class DLL; | |
56 class FileHandle; | |
141 | 57 template<class E> class GrowableArray; |
0 | 58 |
59 // %%%%% Moved ThreadState, START_FN, OSThread to new osThread.hpp. -- Rose | |
60 | |
61 // Platform-independent error return values from OS functions | |
62 enum OSReturn { | |
63 OS_OK = 0, // Operation was successful | |
64 OS_ERR = -1, // Operation failed | |
65 OS_INTRPT = -2, // Operation was interrupted | |
66 OS_TIMEOUT = -3, // Operation timed out | |
67 OS_NOMEM = -5, // Operation failed for lack of memory | |
68 OS_NORESOURCE = -6 // Operation failed for lack of nonmemory resource | |
69 }; | |
70 | |
71 enum ThreadPriority { // JLS 20.20.1-3 | |
72 NoPriority = -1, // Initial non-priority value | |
73 MinPriority = 1, // Minimum priority | |
74 NormPriority = 5, // Normal (non-daemon) priority | |
75 NearMaxPriority = 9, // High priority, used for VMThread | |
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76 MaxPriority = 10, // Highest priority, used for WatcherThread |
0 | 77 // ensures that VMThread doesn't starve profiler |
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78 CriticalPriority = 11 // Critical thread priority |
0 | 79 }; |
80 | |
81 // Typedef for structured exception handling support | |
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82 typedef void (*java_call_t)(JavaValue* value, methodHandle* method, nmethod* nm, JavaCallArguments* args, Thread* thread); |
0 | 83 |
84 class os: AllStatic { | |
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85 public: |
0 | 86 enum { page_sizes_max = 9 }; // Size of _page_sizes array (8 plus a sentinel) |
87 | |
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88 private: |
0 | 89 static OSThread* _starting_thread; |
90 static address _polling_page; | |
91 static volatile int32_t * _mem_serialize_page; | |
92 static uintptr_t _serialize_page_mask; | |
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93 public: |
0 | 94 static size_t _page_sizes[page_sizes_max]; |
95 | |
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96 private: |
0 | 97 static void init_page_sizes(size_t default_page_size) { |
98 _page_sizes[0] = default_page_size; | |
99 _page_sizes[1] = 0; // sentinel | |
100 } | |
101 | |
102 public: | |
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103 static void init(void); // Called before command line parsing |
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104 static jint init_2(void); // Called after command line parsing |
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105 static void init_globals(void) { // Called from init_globals() in init.cpp |
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106 init_globals_ext(); |
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107 } |
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108 static void init_3(void); // Called at the end of vm init |
0 | 109 |
110 // File names are case-insensitive on windows only | |
111 // Override me as needed | |
112 static int file_name_strcmp(const char* s1, const char* s2); | |
113 | |
114 static bool getenv(const char* name, char* buffer, int len); | |
115 static bool have_special_privileges(); | |
116 | |
117 static jlong javaTimeMillis(); | |
118 static jlong javaTimeNanos(); | |
119 static void javaTimeNanos_info(jvmtiTimerInfo *info_ptr); | |
120 static void run_periodic_checks(); | |
121 | |
122 | |
123 // Returns the elapsed time in seconds since the vm started. | |
124 static double elapsedTime(); | |
125 | |
126 // Returns real time in seconds since an arbitrary point | |
127 // in the past. | |
128 static bool getTimesSecs(double* process_real_time, | |
129 double* process_user_time, | |
130 double* process_system_time); | |
131 | |
132 // Interface to the performance counter | |
133 static jlong elapsed_counter(); | |
134 static jlong elapsed_frequency(); | |
135 | |
342
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136 // The "virtual time" of a thread is the amount of time a thread has |
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137 // actually run. The first function indicates whether the OS supports |
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138 // this functionality for the current thread, and if so: |
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139 // * the second enables vtime tracking (if that is required). |
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140 // * the third tells whether vtime is enabled. |
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141 // * the fourth returns the elapsed virtual time for the current |
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142 // thread. |
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143 static bool supports_vtime(); |
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144 static bool enable_vtime(); |
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145 static bool vtime_enabled(); |
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146 static double elapsedVTime(); |
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147 |
0 | 148 // Return current local time in a string (YYYY-MM-DD HH:MM:SS). |
149 // It is MT safe, but not async-safe, as reading time zone | |
150 // information may require a lock on some platforms. | |
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151 static char* local_time_string(char *buf, size_t buflen); |
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152 static struct tm* localtime_pd (const time_t* clock, struct tm* res); |
0 | 153 // Fill in buffer with current local time as an ISO-8601 string. |
154 // E.g., YYYY-MM-DDThh:mm:ss.mmm+zzzz. | |
155 // Returns buffer, or NULL if it failed. | |
156 static char* iso8601_time(char* buffer, size_t buffer_length); | |
157 | |
158 // Interface for detecting multiprocessor system | |
159 static inline bool is_MP() { | |
160 assert(_processor_count > 0, "invalid processor count"); | |
161 return _processor_count > 1; | |
162 } | |
163 static julong available_memory(); | |
164 static julong physical_memory(); | |
165 static julong allocatable_physical_memory(julong size); | |
166 static bool is_server_class_machine(); | |
167 | |
168 // number of CPUs | |
169 static int processor_count() { | |
170 return _processor_count; | |
171 } | |
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172 static void set_processor_count(int count) { _processor_count = count; } |
0 | 173 |
174 // Returns the number of CPUs this process is currently allowed to run on. | |
175 // Note that on some OSes this can change dynamically. | |
176 static int active_processor_count(); | |
177 | |
178 // Bind processes to processors. | |
179 // This is a two step procedure: | |
180 // first you generate a distribution of processes to processors, | |
181 // then you bind processes according to that distribution. | |
182 // Compute a distribution for number of processes to processors. | |
183 // Stores the processor id's into the distribution array argument. | |
184 // Returns true if it worked, false if it didn't. | |
185 static bool distribute_processes(uint length, uint* distribution); | |
186 // Binds the current process to a processor. | |
187 // Returns true if it worked, false if it didn't. | |
188 static bool bind_to_processor(uint processor_id); | |
189 | |
4006 | 190 // Give a name to the current thread. |
191 static void set_native_thread_name(const char *name); | |
192 | |
0 | 193 // Interface for stack banging (predetect possible stack overflow for |
194 // exception processing) There are guard pages, and above that shadow | |
195 // pages for stack overflow checking. | |
196 static bool uses_stack_guard_pages(); | |
197 static bool allocate_stack_guard_pages(); | |
198 static void bang_stack_shadow_pages(); | |
199 static bool stack_shadow_pages_available(Thread *thread, methodHandle method); | |
200 | |
201 // OS interface to Virtual Memory | |
202 | |
203 // Return the default page size. | |
204 static int vm_page_size(); | |
205 | |
206 // Return the page size to use for a region of memory. The min_pages argument | |
207 // is a hint intended to limit fragmentation; it says the returned page size | |
208 // should be <= region_max_size / min_pages. Because min_pages is a hint, | |
209 // this routine may return a size larger than region_max_size / min_pages. | |
210 // | |
211 // The current implementation ignores min_pages if a larger page size is an | |
212 // exact multiple of both region_min_size and region_max_size. This allows | |
213 // larger pages to be used when doing so would not cause fragmentation; in | |
214 // particular, a single page can be used when region_min_size == | |
215 // region_max_size == a supported page size. | |
216 static size_t page_size_for_region(size_t region_min_size, | |
217 size_t region_max_size, | |
218 uint min_pages); | |
219 | |
3859 | 220 // Methods for tracing page sizes returned by the above method; enabled by |
0 | 221 // TracePageSizes. The region_{min,max}_size parameters should be the values |
222 // passed to page_size_for_region() and page_size should be the result of that | |
223 // call. The (optional) base and size parameters should come from the | |
224 // ReservedSpace base() and size() methods. | |
3859 | 225 static void trace_page_sizes(const char* str, const size_t* page_sizes, |
226 int count) PRODUCT_RETURN; | |
0 | 227 static void trace_page_sizes(const char* str, const size_t region_min_size, |
228 const size_t region_max_size, | |
229 const size_t page_size, | |
230 const char* base = NULL, | |
231 const size_t size = 0) PRODUCT_RETURN; | |
232 | |
233 static int vm_allocation_granularity(); | |
234 static char* reserve_memory(size_t bytes, char* addr = 0, | |
235 size_t alignment_hint = 0); | |
236 static char* attempt_reserve_memory_at(size_t bytes, char* addr); | |
237 static void split_reserved_memory(char *base, size_t size, | |
238 size_t split, bool realloc); | |
656 | 239 static bool commit_memory(char* addr, size_t bytes, |
240 bool executable = false); | |
241 static bool commit_memory(char* addr, size_t size, size_t alignment_hint, | |
242 bool executable = false); | |
0 | 243 static bool uncommit_memory(char* addr, size_t bytes); |
244 static bool release_memory(char* addr, size_t bytes); | |
237
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245 |
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246 enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX }; |
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247 static bool protect_memory(char* addr, size_t bytes, ProtType prot, |
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248 bool is_committed = true); |
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249 |
0 | 250 static bool guard_memory(char* addr, size_t bytes); |
251 static bool unguard_memory(char* addr, size_t bytes); | |
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252 static bool create_stack_guard_pages(char* addr, size_t bytes); |
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253 static bool remove_stack_guard_pages(char* addr, size_t bytes); |
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254 |
0 | 255 static char* map_memory(int fd, const char* file_name, size_t file_offset, |
256 char *addr, size_t bytes, bool read_only = false, | |
257 bool allow_exec = false); | |
258 static char* remap_memory(int fd, const char* file_name, size_t file_offset, | |
259 char *addr, size_t bytes, bool read_only, | |
260 bool allow_exec); | |
261 static bool unmap_memory(char *addr, size_t bytes); | |
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262 static void free_memory(char *addr, size_t bytes, size_t alignment_hint); |
0 | 263 static void realign_memory(char *addr, size_t bytes, size_t alignment_hint); |
264 | |
265 // NUMA-specific interface | |
141 | 266 static bool numa_has_static_binding(); |
267 static bool numa_has_group_homing(); | |
268 static void numa_make_local(char *addr, size_t bytes, int lgrp_hint); | |
0 | 269 static void numa_make_global(char *addr, size_t bytes); |
270 static size_t numa_get_groups_num(); | |
271 static size_t numa_get_leaf_groups(int *ids, size_t size); | |
272 static bool numa_topology_changed(); | |
273 static int numa_get_group_id(); | |
274 | |
275 // Page manipulation | |
276 struct page_info { | |
277 size_t size; | |
278 int lgrp_id; | |
279 }; | |
280 static bool get_page_info(char *start, page_info* info); | |
281 static char* scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found); | |
282 | |
283 static char* non_memory_address_word(); | |
284 // reserve, commit and pin the entire memory region | |
656 | 285 static char* reserve_memory_special(size_t size, char* addr = NULL, |
286 bool executable = false); | |
0 | 287 static bool release_memory_special(char* addr, size_t bytes); |
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288 static void large_page_init(); |
0 | 289 static size_t large_page_size(); |
290 static bool can_commit_large_page_memory(); | |
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291 static bool can_execute_large_page_memory(); |
0 | 292 |
293 // OS interface to polling page | |
294 static address get_polling_page() { return _polling_page; } | |
295 static void set_polling_page(address page) { _polling_page = page; } | |
296 static bool is_poll_address(address addr) { return addr >= _polling_page && addr < (_polling_page + os::vm_page_size()); } | |
297 static void make_polling_page_unreadable(); | |
298 static void make_polling_page_readable(); | |
299 | |
300 // Routines used to serialize the thread state without using membars | |
301 static void serialize_thread_states(); | |
302 | |
303 // Since we write to the serialize page from every thread, we | |
304 // want stores to be on unique cache lines whenever possible | |
305 // in order to minimize CPU cross talk. We pre-compute the | |
306 // amount to shift the thread* to make this offset unique to | |
307 // each thread. | |
308 static int get_serialize_page_shift_count() { | |
309 return SerializePageShiftCount; | |
310 } | |
311 | |
312 static void set_serialize_page_mask(uintptr_t mask) { | |
313 _serialize_page_mask = mask; | |
314 } | |
315 | |
316 static unsigned int get_serialize_page_mask() { | |
317 return _serialize_page_mask; | |
318 } | |
319 | |
320 static void set_memory_serialize_page(address page); | |
321 | |
322 static address get_memory_serialize_page() { | |
323 return (address)_mem_serialize_page; | |
324 } | |
325 | |
326 static inline void write_memory_serialize_page(JavaThread *thread) { | |
327 uintptr_t page_offset = ((uintptr_t)thread >> | |
328 get_serialize_page_shift_count()) & | |
329 get_serialize_page_mask(); | |
330 *(volatile int32_t *)((uintptr_t)_mem_serialize_page+page_offset) = 1; | |
331 } | |
332 | |
333 static bool is_memory_serialize_page(JavaThread *thread, address addr) { | |
334 if (UseMembar) return false; | |
1078 | 335 // Previously this function calculated the exact address of this |
336 // thread's serialize page, and checked if the faulting address | |
337 // was equal. However, some platforms mask off faulting addresses | |
338 // to the page size, so now we just check that the address is | |
339 // within the page. This makes the thread argument unnecessary, | |
340 // but we retain the NULL check to preserve existing behaviour. | |
0 | 341 if (thread == NULL) return false; |
1078 | 342 address page = (address) _mem_serialize_page; |
343 return addr >= page && addr < (page + os::vm_page_size()); | |
0 | 344 } |
345 | |
346 static void block_on_serialize_page_trap(); | |
347 | |
348 // threads | |
349 | |
350 enum ThreadType { | |
351 vm_thread, | |
352 cgc_thread, // Concurrent GC thread | |
353 pgc_thread, // Parallel GC thread | |
354 java_thread, | |
355 compiler_thread, | |
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356 watcher_thread, |
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357 os_thread |
0 | 358 }; |
359 | |
360 static bool create_thread(Thread* thread, | |
361 ThreadType thr_type, | |
362 size_t stack_size = 0); | |
363 static bool create_main_thread(JavaThread* thread); | |
364 static bool create_attached_thread(JavaThread* thread); | |
365 static void pd_start_thread(Thread* thread); | |
366 static void start_thread(Thread* thread); | |
367 | |
368 static void initialize_thread(); | |
369 static void free_thread(OSThread* osthread); | |
370 | |
371 // thread id on Linux/64bit is 64bit, on Windows and Solaris, it's 32bit | |
372 static intx current_thread_id(); | |
373 static int current_process_id(); | |
374 static int sleep(Thread* thread, jlong ms, bool interruptable); | |
375 static int naked_sleep(); | |
376 static void infinite_sleep(); // never returns, use with CAUTION | |
377 static void yield(); // Yields to all threads with same priority | |
378 enum YieldResult { | |
379 YIELD_SWITCHED = 1, // caller descheduled, other ready threads exist & ran | |
380 YIELD_NONEREADY = 0, // No other runnable/ready threads. | |
381 // platform-specific yield return immediately | |
382 YIELD_UNKNOWN = -1 // Unknown: platform doesn't support _SWITCHED or _NONEREADY | |
383 // YIELD_SWITCHED and YIELD_NONREADY imply the platform supports a "strong" | |
384 // yield that can be used in lieu of blocking. | |
385 } ; | |
386 static YieldResult NakedYield () ; | |
387 static void yield_all(int attempts = 0); // Yields to all other threads including lower priority | |
388 static void loop_breaker(int attempts); // called from within tight loops to possibly influence time-sharing | |
389 static OSReturn set_priority(Thread* thread, ThreadPriority priority); | |
390 static OSReturn get_priority(const Thread* const thread, ThreadPriority& priority); | |
391 | |
392 static void interrupt(Thread* thread); | |
393 static bool is_interrupted(Thread* thread, bool clear_interrupted); | |
394 | |
395 static int pd_self_suspend_thread(Thread* thread); | |
396 | |
397 static ExtendedPC fetch_frame_from_context(void* ucVoid, intptr_t** sp, intptr_t** fp); | |
398 static frame fetch_frame_from_context(void* ucVoid); | |
399 | |
400 static ExtendedPC get_thread_pc(Thread *thread); | |
401 static void breakpoint(); | |
402 | |
403 static address current_stack_pointer(); | |
404 static address current_stack_base(); | |
405 static size_t current_stack_size(); | |
406 | |
407 static int message_box(const char* title, const char* message); | |
408 static char* do_you_want_to_debug(const char* message); | |
409 | |
410 // run cmd in a separate process and return its exit code; or -1 on failures | |
411 static int fork_and_exec(char *cmd); | |
412 | |
413 // Set file to send error reports. | |
414 static void set_error_file(const char *logfile); | |
415 | |
416 // os::exit() is merged with vm_exit() | |
417 // static void exit(int num); | |
418 | |
419 // Terminate the VM, but don't exit the process | |
420 static void shutdown(); | |
421 | |
422 // Terminate with an error. Default is to generate a core file on platforms | |
423 // that support such things. This calls shutdown() and then aborts. | |
424 static void abort(bool dump_core = true); | |
425 | |
426 // Die immediately, no exit hook, no abort hook, no cleanup. | |
427 static void die(); | |
428 | |
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429 // File i/o operations |
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430 static const int default_file_open_flags(); |
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431 static int open(const char *path, int oflag, int mode); |
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432 static int close(int fd); |
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433 static jlong lseek(int fd, jlong offset, int whence); |
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434 static char* native_path(char *path); |
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435 static int ftruncate(int fd, jlong length); |
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436 static int fsync(int fd); |
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437 static int available(int fd, jlong *bytes); |
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438 |
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439 //File i/o operations |
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440 |
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441 static size_t read(int fd, void *buf, unsigned int nBytes); |
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442 static size_t restartable_read(int fd, void *buf, unsigned int nBytes); |
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443 static size_t write(int fd, const void *buf, unsigned int nBytes); |
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444 |
0 | 445 // Reading directories. |
446 static DIR* opendir(const char* dirname); | |
447 static int readdir_buf_size(const char *path); | |
448 static struct dirent* readdir(DIR* dirp, dirent* dbuf); | |
449 static int closedir(DIR* dirp); | |
450 | |
451 // Dynamic library extension | |
452 static const char* dll_file_extension(); | |
453 | |
454 static const char* get_temp_directory(); | |
455 static const char* get_current_directory(char *buf, int buflen); | |
456 | |
242 | 457 // Builds a platform-specific full library path given a ld path and lib name |
458 static void dll_build_name(char* buffer, size_t size, | |
459 const char* pathname, const char* fname); | |
460 | |
0 | 461 // Symbol lookup, find nearest function name; basically it implements |
462 // dladdr() for all platforms. Name of the nearest function is copied | |
463 // to buf. Distance from its base address is returned as offset. | |
464 // If function name is not found, buf[0] is set to '\0' and offset is | |
465 // set to -1. | |
466 static bool dll_address_to_function_name(address addr, char* buf, | |
467 int buflen, int* offset); | |
468 | |
469 // Locate DLL/DSO. On success, full path of the library is copied to | |
470 // buf, and offset is set to be the distance between addr and the | |
471 // library's base address. On failure, buf[0] is set to '\0' and | |
472 // offset is set to -1. | |
473 static bool dll_address_to_library_name(address addr, char* buf, | |
474 int buflen, int* offset); | |
475 | |
476 // Find out whether the pc is in the static code for jvm.dll/libjvm.so. | |
477 static bool address_is_in_vm(address addr); | |
478 | |
479 // Loads .dll/.so and | |
480 // in case of error it checks if .dll/.so was built for the | |
481 // same architecture as Hotspot is running on | |
482 static void* dll_load(const char *name, char *ebuf, int ebuflen); | |
483 | |
242 | 484 // lookup symbol in a shared library |
485 static void* dll_lookup(void* handle, const char* name); | |
486 | |
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487 // Unload library |
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488 static void dll_unload(void *lib); |
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489 |
0 | 490 // Print out system information; they are called by fatal error handler. |
491 // Output format may be different on different platforms. | |
492 static void print_os_info(outputStream* st); | |
493 static void print_cpu_info(outputStream* st); | |
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494 static void pd_print_cpu_info(outputStream* st); |
0 | 495 static void print_memory_info(outputStream* st); |
496 static void print_dll_info(outputStream* st); | |
497 static void print_environment_variables(outputStream* st, const char** env_list, char* buffer, int len); | |
498 static void print_context(outputStream* st, void* context); | |
1907 | 499 static void print_register_info(outputStream* st, void* context); |
0 | 500 static void print_siginfo(outputStream* st, void* siginfo); |
501 static void print_signal_handlers(outputStream* st, char* buf, size_t buflen); | |
502 static void print_date_and_time(outputStream* st); | |
503 | |
1907 | 504 static void print_location(outputStream* st, intptr_t x, bool verbose = false); |
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505 static size_t lasterror(char *buf, size_t len); |
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506 static int get_last_error(); |
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507 |
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508 // Determines whether the calling process is being debugged by a user-mode debugger. |
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509 static bool is_debugger_attached(); |
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510 |
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511 // wait for a key press if PauseAtExit is set |
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512 static void wait_for_keypress_at_exit(void); |
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513 |
0 | 514 // The following two functions are used by fatal error handler to trace |
515 // native (C) frames. They are not part of frame.hpp/frame.cpp because | |
516 // frame.hpp/cpp assume thread is JavaThread, and also because different | |
517 // OS/compiler may have different convention or provide different API to | |
518 // walk C frames. | |
519 // | |
520 // We don't attempt to become a debugger, so we only follow frames if that | |
521 // does not require a lookup in the unwind table, which is part of the binary | |
522 // file but may be unsafe to read after a fatal error. So on x86, we can | |
523 // only walk stack if %ebp is used as frame pointer; on ia64, it's not | |
524 // possible to walk C stack without having the unwind table. | |
525 static bool is_first_C_frame(frame *fr); | |
526 static frame get_sender_for_C_frame(frame *fr); | |
527 | |
528 // return current frame. pc() and sp() are set to NULL on failure. | |
529 static frame current_frame(); | |
530 | |
531 static void print_hex_dump(outputStream* st, address start, address end, int unitsize); | |
532 | |
533 // returns a string to describe the exception/signal; | |
534 // returns NULL if exception_code is not an OS exception/signal. | |
535 static const char* exception_name(int exception_code, char* buf, size_t buflen); | |
536 | |
537 // Returns native Java library, loads if necessary | |
538 static void* native_java_library(); | |
539 | |
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540 // Fills in path to jvm.dll/libjvm.so (used by the Disassembler) |
0 | 541 static void jvm_path(char *buf, jint buflen); |
542 | |
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543 // Returns true if we are running in a headless jre. |
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544 static bool is_headless_jre(); |
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545 |
0 | 546 // JNI names |
547 static void print_jni_name_prefix_on(outputStream* st, int args_size); | |
548 static void print_jni_name_suffix_on(outputStream* st, int args_size); | |
549 | |
550 // File conventions | |
551 static const char* file_separator(); | |
552 static const char* line_separator(); | |
553 static const char* path_separator(); | |
554 | |
555 // Init os specific system properties values | |
556 static void init_system_properties_values(); | |
557 | |
558 // IO operations, non-JVM_ version. | |
559 static int stat(const char* path, struct stat* sbuf); | |
560 static bool dir_is_empty(const char* path); | |
561 | |
562 // IO operations on binary files | |
563 static int create_binary_file(const char* path, bool rewrite_existing); | |
564 static jlong current_file_offset(int fd); | |
565 static jlong seek_to_file_offset(int fd, jlong offset); | |
566 | |
567 // Thread Local Storage | |
568 static int allocate_thread_local_storage(); | |
569 static void thread_local_storage_at_put(int index, void* value); | |
570 static void* thread_local_storage_at(int index); | |
571 static void free_thread_local_storage(int index); | |
572 | |
573 // General allocation (must be MT-safe) | |
574 static void* malloc (size_t size); | |
575 static void* realloc (void *memblock, size_t size); | |
576 static void free (void *memblock); | |
577 static bool check_heap(bool force = false); // verify C heap integrity | |
578 static char* strdup(const char *); // Like strdup | |
579 | |
580 #ifndef PRODUCT | |
2250 | 581 static julong num_mallocs; // # of calls to malloc/realloc |
582 static julong alloc_bytes; // # of bytes allocated | |
583 static julong num_frees; // # of calls to free | |
584 static julong free_bytes; // # of bytes freed | |
0 | 585 #endif |
586 | |
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587 // SocketInterface (ex HPI SocketInterface ) |
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588 static int socket(int domain, int type, int protocol); |
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589 static int socket_close(int fd); |
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590 static int socket_shutdown(int fd, int howto); |
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591 static int recv(int fd, char* buf, size_t nBytes, uint flags); |
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592 static int send(int fd, char* buf, size_t nBytes, uint flags); |
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593 static int raw_send(int fd, char* buf, size_t nBytes, uint flags); |
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594 static int timeout(int fd, long timeout); |
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595 static int listen(int fd, int count); |
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596 static int connect(int fd, struct sockaddr* him, socklen_t len); |
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597 static int bind(int fd, struct sockaddr* him, socklen_t len); |
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598 static int accept(int fd, struct sockaddr* him, socklen_t* len); |
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599 static int recvfrom(int fd, char* buf, size_t nbytes, uint flags, |
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600 struct sockaddr* from, socklen_t* fromlen); |
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601 static int get_sock_name(int fd, struct sockaddr* him, socklen_t* len); |
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602 static int sendto(int fd, char* buf, size_t len, uint flags, |
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603 struct sockaddr* to, socklen_t tolen); |
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604 static int socket_available(int fd, jint* pbytes); |
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605 |
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606 static int get_sock_opt(int fd, int level, int optname, |
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607 char* optval, socklen_t* optlen); |
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608 static int set_sock_opt(int fd, int level, int optname, |
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609 const char* optval, socklen_t optlen); |
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610 static int get_host_name(char* name, int namelen); |
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611 |
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612 static struct hostent* get_host_by_name(char* name); |
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613 |
0 | 614 // Printing 64 bit integers |
615 static const char* jlong_format_specifier(); | |
616 static const char* julong_format_specifier(); | |
617 | |
618 // Support for signals (see JVM_RaiseSignal, JVM_RegisterSignal) | |
619 static void signal_init(); | |
620 static void signal_init_pd(); | |
621 static void signal_notify(int signal_number); | |
622 static void* signal(int signal_number, void* handler); | |
623 static void signal_raise(int signal_number); | |
624 static int signal_wait(); | |
625 static int signal_lookup(); | |
626 static void* user_handler(); | |
627 static void terminate_signal_thread(); | |
628 static int sigexitnum_pd(); | |
629 | |
630 // random number generation | |
631 static long random(); // return 32bit pseudorandom number | |
632 static void init_random(long initval); // initialize random sequence | |
633 | |
634 // Structured OS Exception support | |
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635 static void os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, nmethod* nm, JavaCallArguments* args, Thread* thread); |
0 | 636 |
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637 // On Windows this will create an actual minidump, on Linux/Solaris it will simply check core dump limits |
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638 static void check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize); |
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639 |
0 | 640 // JVMTI & JVM monitoring and management support |
641 // The thread_cpu_time() and current_thread_cpu_time() are only | |
642 // supported if is_thread_cpu_time_supported() returns true. | |
643 // They are not supported on Solaris T1. | |
644 | |
645 // Thread CPU Time - return the fast estimate on a platform | |
646 // On Solaris - call gethrvtime (fast) - user time only | |
647 // On Linux - fast clock_gettime where available - user+sys | |
648 // - otherwise: very slow /proc fs - user+sys | |
649 // On Windows - GetThreadTimes - user+sys | |
650 static jlong current_thread_cpu_time(); | |
651 static jlong thread_cpu_time(Thread* t); | |
652 | |
653 // Thread CPU Time with user_sys_cpu_time parameter. | |
654 // | |
655 // If user_sys_cpu_time is true, user+sys time is returned. | |
656 // Otherwise, only user time is returned | |
657 static jlong current_thread_cpu_time(bool user_sys_cpu_time); | |
658 static jlong thread_cpu_time(Thread* t, bool user_sys_cpu_time); | |
659 | |
660 // Return a bunch of info about the timers. | |
661 // Note that the returned info for these two functions may be different | |
662 // on some platforms | |
663 static void current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
664 static void thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
665 | |
666 static bool is_thread_cpu_time_supported(); | |
667 | |
668 // System loadavg support. Returns -1 if load average cannot be obtained. | |
669 static int loadavg(double loadavg[], int nelem); | |
670 | |
671 // Hook for os specific jvm options that we don't want to abort on seeing | |
672 static bool obsolete_option(const JavaVMOption *option); | |
673 | |
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674 // Read file line by line. If line is longer than bsize, |
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675 // rest of line is skipped. Returns number of bytes read or -1 on EOF |
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676 static int get_line_chars(int fd, char *buf, const size_t bsize); |
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677 |
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678 // Extensions |
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679 #include "runtime/os_ext.hpp" |
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680 |
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681 public: |
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682 |
0 | 683 // Platform dependent stuff |
1972 | 684 #ifdef TARGET_OS_FAMILY_linux |
685 # include "os_linux.hpp" | |
686 #endif | |
687 #ifdef TARGET_OS_FAMILY_solaris | |
688 # include "os_solaris.hpp" | |
689 #endif | |
690 #ifdef TARGET_OS_FAMILY_windows | |
691 # include "os_windows.hpp" | |
692 #endif | |
3960 | 693 #ifdef TARGET_OS_FAMILY_bsd |
694 # include "os_bsd.hpp" | |
695 #endif | |
1972 | 696 #ifdef TARGET_OS_ARCH_linux_x86 |
697 # include "os_linux_x86.hpp" | |
698 #endif | |
699 #ifdef TARGET_OS_ARCH_linux_sparc | |
700 # include "os_linux_sparc.hpp" | |
701 #endif | |
702 #ifdef TARGET_OS_ARCH_linux_zero | |
703 # include "os_linux_zero.hpp" | |
704 #endif | |
705 #ifdef TARGET_OS_ARCH_solaris_x86 | |
706 # include "os_solaris_x86.hpp" | |
707 #endif | |
708 #ifdef TARGET_OS_ARCH_solaris_sparc | |
709 # include "os_solaris_sparc.hpp" | |
710 #endif | |
711 #ifdef TARGET_OS_ARCH_windows_x86 | |
712 # include "os_windows_x86.hpp" | |
713 #endif | |
2192
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714 #ifdef TARGET_OS_ARCH_linux_arm |
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715 # include "os_linux_arm.hpp" |
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716 #endif |
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717 #ifdef TARGET_OS_ARCH_linux_ppc |
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718 # include "os_linux_ppc.hpp" |
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719 #endif |
3960 | 720 #ifdef TARGET_OS_ARCH_bsd_x86 |
721 # include "os_bsd_x86.hpp" | |
722 #endif | |
723 #ifdef TARGET_OS_ARCH_bsd_zero | |
724 # include "os_bsd_zero.hpp" | |
725 #endif | |
1972 | 726 |
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727 public: |
1681
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728 // debugging support (mostly used by debug.cpp but also fatal error handler) |
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729 static bool find(address pc, outputStream* st = tty); // OS specific function to make sense out of an address |
0 | 730 |
731 static bool dont_yield(); // when true, JVM_Yield() is nop | |
732 static void print_statistics(); | |
733 | |
734 // Thread priority helpers (implemented in OS-specific part) | |
735 static OSReturn set_native_priority(Thread* thread, int native_prio); | |
736 static OSReturn get_native_priority(const Thread* const thread, int* priority_ptr); | |
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737 static int java_to_os_priority[CriticalPriority + 1]; |
0 | 738 // Hint to the underlying OS that a task switch would not be good. |
739 // Void return because it's a hint and can fail. | |
740 static void hint_no_preempt(); | |
741 | |
742 // Used at creation if requested by the diagnostic flag PauseAtStartup. | |
743 // Causes the VM to wait until an external stimulus has been applied | |
744 // (for Unix, that stimulus is a signal, for Windows, an external | |
745 // ResumeThread call) | |
746 static void pause(); | |
747 | |
748 protected: | |
749 static long _rand_seed; // seed for random number generator | |
750 static int _processor_count; // number of processors | |
751 | |
752 static char* format_boot_path(const char* format_string, | |
753 const char* home, | |
754 int home_len, | |
755 char fileSep, | |
756 char pathSep); | |
757 static bool set_boot_path(char fileSep, char pathSep); | |
691 | 758 static char** split_path(const char* path, int* n); |
0 | 759 }; |
760 | |
761 // Note that "PAUSE" is almost always used with synchronization | |
762 // so arguably we should provide Atomic::SpinPause() instead | |
763 // of the global SpinPause() with C linkage. | |
764 // It'd also be eligible for inlining on many platforms. | |
765 | |
766 extern "C" int SpinPause () ; | |
767 extern "C" int SafeFetch32 (int * adr, int errValue) ; | |
768 extern "C" intptr_t SafeFetchN (intptr_t * adr, intptr_t errValue) ; | |
1972 | 769 |
770 #endif // SHARE_VM_RUNTIME_OS_HPP |