Mercurial > hg > truffle
annotate src/share/vm/runtime/os.hpp @ 7811:94ea9a864fc6
Remove usages of VmIds.toString.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Mon, 18 Feb 2013 19:08:52 -0800 |
parents | 3ac7d10a6572 |
children | b8f261ba79c6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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 | |
6197 | 102 static char* pd_reserve_memory(size_t bytes, char* addr = 0, |
103 size_t alignment_hint = 0); | |
104 static char* pd_attempt_reserve_memory_at(size_t bytes, char* addr); | |
105 static void pd_split_reserved_memory(char *base, size_t size, | |
106 size_t split, bool realloc); | |
107 static bool pd_commit_memory(char* addr, size_t bytes, bool executable = false); | |
108 static bool pd_commit_memory(char* addr, size_t size, size_t alignment_hint, | |
109 bool executable = false); | |
110 static bool pd_uncommit_memory(char* addr, size_t bytes); | |
111 static bool pd_release_memory(char* addr, size_t bytes); | |
112 | |
113 static char* pd_map_memory(int fd, const char* file_name, size_t file_offset, | |
114 char *addr, size_t bytes, bool read_only = false, | |
115 bool allow_exec = false); | |
116 static char* pd_remap_memory(int fd, const char* file_name, size_t file_offset, | |
117 char *addr, size_t bytes, bool read_only, | |
118 bool allow_exec); | |
119 static bool pd_unmap_memory(char *addr, size_t bytes); | |
120 static void pd_free_memory(char *addr, size_t bytes, size_t alignment_hint); | |
121 static void pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint); | |
122 | |
123 | |
0 | 124 public: |
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125 static void init(void); // Called before command line parsing |
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126 static jint init_2(void); // Called after command line parsing |
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127 static void init_globals(void) { // Called from init_globals() in init.cpp |
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128 init_globals_ext(); |
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129 } |
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130 static void init_3(void); // Called at the end of vm init |
0 | 131 |
132 // File names are case-insensitive on windows only | |
133 // Override me as needed | |
134 static int file_name_strcmp(const char* s1, const char* s2); | |
135 | |
136 static bool getenv(const char* name, char* buffer, int len); | |
137 static bool have_special_privileges(); | |
138 | |
139 static jlong javaTimeMillis(); | |
140 static jlong javaTimeNanos(); | |
141 static void javaTimeNanos_info(jvmtiTimerInfo *info_ptr); | |
142 static void run_periodic_checks(); | |
143 | |
144 | |
145 // Returns the elapsed time in seconds since the vm started. | |
146 static double elapsedTime(); | |
147 | |
148 // Returns real time in seconds since an arbitrary point | |
149 // in the past. | |
150 static bool getTimesSecs(double* process_real_time, | |
151 double* process_user_time, | |
152 double* process_system_time); | |
153 | |
154 // Interface to the performance counter | |
155 static jlong elapsed_counter(); | |
156 static jlong elapsed_frequency(); | |
157 | |
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158 // The "virtual time" of a thread is the amount of time a thread has |
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159 // actually run. The first function indicates whether the OS supports |
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160 // this functionality for the current thread, and if so: |
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161 // * the second enables vtime tracking (if that is required). |
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162 // * the third tells whether vtime is enabled. |
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163 // * the fourth returns the elapsed virtual time for the current |
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164 // thread. |
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165 static bool supports_vtime(); |
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166 static bool enable_vtime(); |
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167 static bool vtime_enabled(); |
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168 static double elapsedVTime(); |
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169 |
0 | 170 // Return current local time in a string (YYYY-MM-DD HH:MM:SS). |
171 // It is MT safe, but not async-safe, as reading time zone | |
172 // information may require a lock on some platforms. | |
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173 static char* local_time_string(char *buf, size_t buflen); |
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174 static struct tm* localtime_pd (const time_t* clock, struct tm* res); |
0 | 175 // Fill in buffer with current local time as an ISO-8601 string. |
176 // E.g., YYYY-MM-DDThh:mm:ss.mmm+zzzz. | |
177 // Returns buffer, or NULL if it failed. | |
178 static char* iso8601_time(char* buffer, size_t buffer_length); | |
179 | |
180 // Interface for detecting multiprocessor system | |
181 static inline bool is_MP() { | |
182 assert(_processor_count > 0, "invalid processor count"); | |
183 return _processor_count > 1; | |
184 } | |
185 static julong available_memory(); | |
186 static julong physical_memory(); | |
187 static julong allocatable_physical_memory(julong size); | |
188 static bool is_server_class_machine(); | |
189 | |
190 // number of CPUs | |
191 static int processor_count() { | |
192 return _processor_count; | |
193 } | |
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194 static void set_processor_count(int count) { _processor_count = count; } |
0 | 195 |
196 // Returns the number of CPUs this process is currently allowed to run on. | |
197 // Note that on some OSes this can change dynamically. | |
198 static int active_processor_count(); | |
199 | |
200 // Bind processes to processors. | |
201 // This is a two step procedure: | |
202 // first you generate a distribution of processes to processors, | |
203 // then you bind processes according to that distribution. | |
204 // Compute a distribution for number of processes to processors. | |
205 // Stores the processor id's into the distribution array argument. | |
206 // Returns true if it worked, false if it didn't. | |
207 static bool distribute_processes(uint length, uint* distribution); | |
208 // Binds the current process to a processor. | |
209 // Returns true if it worked, false if it didn't. | |
210 static bool bind_to_processor(uint processor_id); | |
211 | |
4006 | 212 // Give a name to the current thread. |
213 static void set_native_thread_name(const char *name); | |
214 | |
0 | 215 // Interface for stack banging (predetect possible stack overflow for |
216 // exception processing) There are guard pages, and above that shadow | |
217 // pages for stack overflow checking. | |
218 static bool uses_stack_guard_pages(); | |
219 static bool allocate_stack_guard_pages(); | |
220 static void bang_stack_shadow_pages(); | |
221 static bool stack_shadow_pages_available(Thread *thread, methodHandle method); | |
222 | |
223 // OS interface to Virtual Memory | |
224 | |
225 // Return the default page size. | |
226 static int vm_page_size(); | |
227 | |
228 // Return the page size to use for a region of memory. The min_pages argument | |
229 // is a hint intended to limit fragmentation; it says the returned page size | |
230 // should be <= region_max_size / min_pages. Because min_pages is a hint, | |
231 // this routine may return a size larger than region_max_size / min_pages. | |
232 // | |
233 // The current implementation ignores min_pages if a larger page size is an | |
234 // exact multiple of both region_min_size and region_max_size. This allows | |
235 // larger pages to be used when doing so would not cause fragmentation; in | |
236 // particular, a single page can be used when region_min_size == | |
237 // region_max_size == a supported page size. | |
238 static size_t page_size_for_region(size_t region_min_size, | |
239 size_t region_max_size, | |
240 uint min_pages); | |
241 | |
3859 | 242 // Methods for tracing page sizes returned by the above method; enabled by |
0 | 243 // TracePageSizes. The region_{min,max}_size parameters should be the values |
244 // passed to page_size_for_region() and page_size should be the result of that | |
245 // call. The (optional) base and size parameters should come from the | |
246 // ReservedSpace base() and size() methods. | |
3859 | 247 static void trace_page_sizes(const char* str, const size_t* page_sizes, |
248 int count) PRODUCT_RETURN; | |
0 | 249 static void trace_page_sizes(const char* str, const size_t region_min_size, |
250 const size_t region_max_size, | |
251 const size_t page_size, | |
252 const char* base = NULL, | |
253 const size_t size = 0) PRODUCT_RETURN; | |
254 | |
255 static int vm_allocation_granularity(); | |
256 static char* reserve_memory(size_t bytes, char* addr = 0, | |
257 size_t alignment_hint = 0); | |
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258 static char* reserve_memory_aligned(size_t size, size_t alignment); |
0 | 259 static char* attempt_reserve_memory_at(size_t bytes, char* addr); |
260 static void split_reserved_memory(char *base, size_t size, | |
261 size_t split, bool realloc); | |
6197 | 262 static bool commit_memory(char* addr, size_t bytes, bool executable = false); |
656 | 263 static bool commit_memory(char* addr, size_t size, size_t alignment_hint, |
264 bool executable = false); | |
0 | 265 static bool uncommit_memory(char* addr, size_t bytes); |
266 static bool release_memory(char* addr, size_t bytes); | |
237
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267 |
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268 enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX }; |
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269 static bool protect_memory(char* addr, size_t bytes, ProtType prot, |
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270 bool is_committed = true); |
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271 |
0 | 272 static bool guard_memory(char* addr, size_t bytes); |
273 static bool unguard_memory(char* addr, size_t bytes); | |
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274 static bool create_stack_guard_pages(char* addr, size_t bytes); |
6197 | 275 static bool pd_create_stack_guard_pages(char* addr, size_t bytes); |
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276 static bool remove_stack_guard_pages(char* addr, size_t bytes); |
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277 |
0 | 278 static char* map_memory(int fd, const char* file_name, size_t file_offset, |
279 char *addr, size_t bytes, bool read_only = false, | |
280 bool allow_exec = false); | |
281 static char* remap_memory(int fd, const char* file_name, size_t file_offset, | |
282 char *addr, size_t bytes, bool read_only, | |
283 bool allow_exec); | |
284 static bool unmap_memory(char *addr, size_t bytes); | |
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285 static void free_memory(char *addr, size_t bytes, size_t alignment_hint); |
0 | 286 static void realign_memory(char *addr, size_t bytes, size_t alignment_hint); |
287 | |
288 // NUMA-specific interface | |
141 | 289 static bool numa_has_static_binding(); |
290 static bool numa_has_group_homing(); | |
291 static void numa_make_local(char *addr, size_t bytes, int lgrp_hint); | |
0 | 292 static void numa_make_global(char *addr, size_t bytes); |
293 static size_t numa_get_groups_num(); | |
294 static size_t numa_get_leaf_groups(int *ids, size_t size); | |
295 static bool numa_topology_changed(); | |
296 static int numa_get_group_id(); | |
297 | |
298 // Page manipulation | |
299 struct page_info { | |
300 size_t size; | |
301 int lgrp_id; | |
302 }; | |
303 static bool get_page_info(char *start, page_info* info); | |
304 static char* scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found); | |
305 | |
306 static char* non_memory_address_word(); | |
307 // reserve, commit and pin the entire memory region | |
656 | 308 static char* reserve_memory_special(size_t size, char* addr = NULL, |
309 bool executable = false); | |
0 | 310 static bool release_memory_special(char* addr, size_t bytes); |
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311 static void large_page_init(); |
0 | 312 static size_t large_page_size(); |
313 static bool can_commit_large_page_memory(); | |
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314 static bool can_execute_large_page_memory(); |
0 | 315 |
316 // OS interface to polling page | |
317 static address get_polling_page() { return _polling_page; } | |
318 static void set_polling_page(address page) { _polling_page = page; } | |
319 static bool is_poll_address(address addr) { return addr >= _polling_page && addr < (_polling_page + os::vm_page_size()); } | |
320 static void make_polling_page_unreadable(); | |
321 static void make_polling_page_readable(); | |
322 | |
323 // Routines used to serialize the thread state without using membars | |
324 static void serialize_thread_states(); | |
325 | |
326 // Since we write to the serialize page from every thread, we | |
327 // want stores to be on unique cache lines whenever possible | |
328 // in order to minimize CPU cross talk. We pre-compute the | |
329 // amount to shift the thread* to make this offset unique to | |
330 // each thread. | |
331 static int get_serialize_page_shift_count() { | |
332 return SerializePageShiftCount; | |
333 } | |
334 | |
335 static void set_serialize_page_mask(uintptr_t mask) { | |
336 _serialize_page_mask = mask; | |
337 } | |
338 | |
339 static unsigned int get_serialize_page_mask() { | |
340 return _serialize_page_mask; | |
341 } | |
342 | |
343 static void set_memory_serialize_page(address page); | |
344 | |
345 static address get_memory_serialize_page() { | |
346 return (address)_mem_serialize_page; | |
347 } | |
348 | |
349 static inline void write_memory_serialize_page(JavaThread *thread) { | |
350 uintptr_t page_offset = ((uintptr_t)thread >> | |
351 get_serialize_page_shift_count()) & | |
352 get_serialize_page_mask(); | |
353 *(volatile int32_t *)((uintptr_t)_mem_serialize_page+page_offset) = 1; | |
354 } | |
355 | |
356 static bool is_memory_serialize_page(JavaThread *thread, address addr) { | |
357 if (UseMembar) return false; | |
1078 | 358 // Previously this function calculated the exact address of this |
359 // thread's serialize page, and checked if the faulting address | |
360 // was equal. However, some platforms mask off faulting addresses | |
361 // to the page size, so now we just check that the address is | |
362 // within the page. This makes the thread argument unnecessary, | |
363 // but we retain the NULL check to preserve existing behaviour. | |
0 | 364 if (thread == NULL) return false; |
1078 | 365 address page = (address) _mem_serialize_page; |
366 return addr >= page && addr < (page + os::vm_page_size()); | |
0 | 367 } |
368 | |
369 static void block_on_serialize_page_trap(); | |
370 | |
371 // threads | |
372 | |
373 enum ThreadType { | |
374 vm_thread, | |
375 cgc_thread, // Concurrent GC thread | |
376 pgc_thread, // Parallel GC thread | |
377 java_thread, | |
378 compiler_thread, | |
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379 watcher_thread, |
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380 os_thread |
0 | 381 }; |
382 | |
383 static bool create_thread(Thread* thread, | |
384 ThreadType thr_type, | |
385 size_t stack_size = 0); | |
386 static bool create_main_thread(JavaThread* thread); | |
387 static bool create_attached_thread(JavaThread* thread); | |
388 static void pd_start_thread(Thread* thread); | |
389 static void start_thread(Thread* thread); | |
390 | |
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391 static void initialize_thread(Thread* thr); |
0 | 392 static void free_thread(OSThread* osthread); |
393 | |
394 // thread id on Linux/64bit is 64bit, on Windows and Solaris, it's 32bit | |
395 static intx current_thread_id(); | |
396 static int current_process_id(); | |
397 static int sleep(Thread* thread, jlong ms, bool interruptable); | |
398 static int naked_sleep(); | |
399 static void infinite_sleep(); // never returns, use with CAUTION | |
400 static void yield(); // Yields to all threads with same priority | |
401 enum YieldResult { | |
402 YIELD_SWITCHED = 1, // caller descheduled, other ready threads exist & ran | |
403 YIELD_NONEREADY = 0, // No other runnable/ready threads. | |
404 // platform-specific yield return immediately | |
405 YIELD_UNKNOWN = -1 // Unknown: platform doesn't support _SWITCHED or _NONEREADY | |
406 // YIELD_SWITCHED and YIELD_NONREADY imply the platform supports a "strong" | |
407 // yield that can be used in lieu of blocking. | |
408 } ; | |
409 static YieldResult NakedYield () ; | |
410 static void yield_all(int attempts = 0); // Yields to all other threads including lower priority | |
411 static void loop_breaker(int attempts); // called from within tight loops to possibly influence time-sharing | |
412 static OSReturn set_priority(Thread* thread, ThreadPriority priority); | |
413 static OSReturn get_priority(const Thread* const thread, ThreadPriority& priority); | |
414 | |
415 static void interrupt(Thread* thread); | |
416 static bool is_interrupted(Thread* thread, bool clear_interrupted); | |
417 | |
418 static int pd_self_suspend_thread(Thread* thread); | |
419 | |
420 static ExtendedPC fetch_frame_from_context(void* ucVoid, intptr_t** sp, intptr_t** fp); | |
421 static frame fetch_frame_from_context(void* ucVoid); | |
422 | |
423 static ExtendedPC get_thread_pc(Thread *thread); | |
424 static void breakpoint(); | |
425 | |
426 static address current_stack_pointer(); | |
427 static address current_stack_base(); | |
428 static size_t current_stack_size(); | |
429 | |
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430 static void verify_stack_alignment() PRODUCT_RETURN; |
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431 |
0 | 432 static int message_box(const char* title, const char* message); |
433 static char* do_you_want_to_debug(const char* message); | |
434 | |
435 // run cmd in a separate process and return its exit code; or -1 on failures | |
436 static int fork_and_exec(char *cmd); | |
437 | |
438 // Set file to send error reports. | |
439 static void set_error_file(const char *logfile); | |
440 | |
441 // os::exit() is merged with vm_exit() | |
442 // static void exit(int num); | |
443 | |
444 // Terminate the VM, but don't exit the process | |
445 static void shutdown(); | |
446 | |
447 // Terminate with an error. Default is to generate a core file on platforms | |
448 // that support such things. This calls shutdown() and then aborts. | |
449 static void abort(bool dump_core = true); | |
450 | |
451 // Die immediately, no exit hook, no abort hook, no cleanup. | |
452 static void die(); | |
453 | |
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454 // File i/o operations |
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455 static const int default_file_open_flags(); |
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456 static int open(const char *path, int oflag, int mode); |
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457 static int close(int fd); |
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458 static jlong lseek(int fd, jlong offset, int whence); |
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459 static char* native_path(char *path); |
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460 static int ftruncate(int fd, jlong length); |
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461 static int fsync(int fd); |
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462 static int available(int fd, jlong *bytes); |
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463 |
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464 //File i/o operations |
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465 |
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466 static size_t read(int fd, void *buf, unsigned int nBytes); |
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467 static size_t restartable_read(int fd, void *buf, unsigned int nBytes); |
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468 static size_t write(int fd, const void *buf, unsigned int nBytes); |
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469 |
0 | 470 // Reading directories. |
471 static DIR* opendir(const char* dirname); | |
472 static int readdir_buf_size(const char *path); | |
473 static struct dirent* readdir(DIR* dirp, dirent* dbuf); | |
474 static int closedir(DIR* dirp); | |
475 | |
476 // Dynamic library extension | |
477 static const char* dll_file_extension(); | |
478 | |
479 static const char* get_temp_directory(); | |
480 static const char* get_current_directory(char *buf, int buflen); | |
481 | |
242 | 482 // Builds a platform-specific full library path given a ld path and lib name |
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483 // Returns true if buffer contains full path to existing file, false otherwise |
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484 static bool dll_build_name(char* buffer, size_t size, |
242 | 485 const char* pathname, const char* fname); |
486 | |
0 | 487 // Symbol lookup, find nearest function name; basically it implements |
488 // dladdr() for all platforms. Name of the nearest function is copied | |
489 // to buf. Distance from its base address is returned as offset. | |
490 // If function name is not found, buf[0] is set to '\0' and offset is | |
491 // set to -1. | |
492 static bool dll_address_to_function_name(address addr, char* buf, | |
493 int buflen, int* offset); | |
494 | |
495 // Locate DLL/DSO. On success, full path of the library is copied to | |
496 // buf, and offset is set to be the distance between addr and the | |
497 // library's base address. On failure, buf[0] is set to '\0' and | |
498 // offset is set to -1. | |
499 static bool dll_address_to_library_name(address addr, char* buf, | |
500 int buflen, int* offset); | |
501 | |
502 // Find out whether the pc is in the static code for jvm.dll/libjvm.so. | |
503 static bool address_is_in_vm(address addr); | |
504 | |
505 // Loads .dll/.so and | |
506 // in case of error it checks if .dll/.so was built for the | |
507 // same architecture as Hotspot is running on | |
508 static void* dll_load(const char *name, char *ebuf, int ebuflen); | |
509 | |
242 | 510 // lookup symbol in a shared library |
511 static void* dll_lookup(void* handle, const char* name); | |
512 | |
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513 // Unload library |
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514 static void dll_unload(void *lib); |
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515 |
0 | 516 // Print out system information; they are called by fatal error handler. |
517 // Output format may be different on different platforms. | |
518 static void print_os_info(outputStream* st); | |
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519 static void print_os_info_brief(outputStream* st); |
0 | 520 static void print_cpu_info(outputStream* st); |
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521 static void pd_print_cpu_info(outputStream* st); |
0 | 522 static void print_memory_info(outputStream* st); |
523 static void print_dll_info(outputStream* st); | |
524 static void print_environment_variables(outputStream* st, const char** env_list, char* buffer, int len); | |
525 static void print_context(outputStream* st, void* context); | |
1907 | 526 static void print_register_info(outputStream* st, void* context); |
0 | 527 static void print_siginfo(outputStream* st, void* siginfo); |
528 static void print_signal_handlers(outputStream* st, char* buf, size_t buflen); | |
529 static void print_date_and_time(outputStream* st); | |
530 | |
1907 | 531 static void print_location(outputStream* st, intptr_t x, bool verbose = false); |
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532 static size_t lasterror(char *buf, size_t len); |
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533 static int get_last_error(); |
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534 |
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535 // Determines whether the calling process is being debugged by a user-mode debugger. |
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536 static bool is_debugger_attached(); |
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537 |
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538 // wait for a key press if PauseAtExit is set |
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539 static void wait_for_keypress_at_exit(void); |
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540 |
0 | 541 // The following two functions are used by fatal error handler to trace |
542 // native (C) frames. They are not part of frame.hpp/frame.cpp because | |
543 // frame.hpp/cpp assume thread is JavaThread, and also because different | |
544 // OS/compiler may have different convention or provide different API to | |
545 // walk C frames. | |
546 // | |
547 // We don't attempt to become a debugger, so we only follow frames if that | |
548 // does not require a lookup in the unwind table, which is part of the binary | |
549 // file but may be unsafe to read after a fatal error. So on x86, we can | |
550 // only walk stack if %ebp is used as frame pointer; on ia64, it's not | |
551 // possible to walk C stack without having the unwind table. | |
552 static bool is_first_C_frame(frame *fr); | |
553 static frame get_sender_for_C_frame(frame *fr); | |
554 | |
555 // return current frame. pc() and sp() are set to NULL on failure. | |
556 static frame current_frame(); | |
557 | |
558 static void print_hex_dump(outputStream* st, address start, address end, int unitsize); | |
559 | |
560 // returns a string to describe the exception/signal; | |
561 // returns NULL if exception_code is not an OS exception/signal. | |
562 static const char* exception_name(int exception_code, char* buf, size_t buflen); | |
563 | |
564 // Returns native Java library, loads if necessary | |
565 static void* native_java_library(); | |
566 | |
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567 // Fills in path to jvm.dll/libjvm.so (used by the Disassembler) |
0 | 568 static void jvm_path(char *buf, jint buflen); |
569 | |
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570 // Returns true if we are running in a headless jre. |
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571 static bool is_headless_jre(); |
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572 |
0 | 573 // JNI names |
574 static void print_jni_name_prefix_on(outputStream* st, int args_size); | |
575 static void print_jni_name_suffix_on(outputStream* st, int args_size); | |
576 | |
577 // File conventions | |
578 static const char* file_separator(); | |
579 static const char* line_separator(); | |
580 static const char* path_separator(); | |
581 | |
582 // Init os specific system properties values | |
583 static void init_system_properties_values(); | |
584 | |
585 // IO operations, non-JVM_ version. | |
586 static int stat(const char* path, struct stat* sbuf); | |
587 static bool dir_is_empty(const char* path); | |
588 | |
589 // IO operations on binary files | |
590 static int create_binary_file(const char* path, bool rewrite_existing); | |
591 static jlong current_file_offset(int fd); | |
592 static jlong seek_to_file_offset(int fd, jlong offset); | |
593 | |
594 // Thread Local Storage | |
595 static int allocate_thread_local_storage(); | |
596 static void thread_local_storage_at_put(int index, void* value); | |
597 static void* thread_local_storage_at(int index); | |
598 static void free_thread_local_storage(int index); | |
599 | |
6197 | 600 // Stack walk |
601 static address get_caller_pc(int n = 0); | |
602 | |
0 | 603 // General allocation (must be MT-safe) |
6197 | 604 static void* malloc (size_t size, MEMFLAGS flags, address caller_pc = 0); |
605 static void* realloc (void *memblock, size_t size, MEMFLAGS flags, address caller_pc = 0); | |
606 static void free (void *memblock, MEMFLAGS flags = mtNone); | |
0 | 607 static bool check_heap(bool force = false); // verify C heap integrity |
6197 | 608 static char* strdup(const char *, MEMFLAGS flags = mtInternal); // Like strdup |
0 | 609 |
610 #ifndef PRODUCT | |
2250 | 611 static julong num_mallocs; // # of calls to malloc/realloc |
612 static julong alloc_bytes; // # of bytes allocated | |
613 static julong num_frees; // # of calls to free | |
614 static julong free_bytes; // # of bytes freed | |
0 | 615 #endif |
616 | |
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617 // SocketInterface (ex HPI SocketInterface ) |
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618 static int socket(int domain, int type, int protocol); |
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619 static int socket_close(int fd); |
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620 static int socket_shutdown(int fd, int howto); |
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621 static int recv(int fd, char* buf, size_t nBytes, uint flags); |
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622 static int send(int fd, char* buf, size_t nBytes, uint flags); |
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623 static int raw_send(int fd, char* buf, size_t nBytes, uint flags); |
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624 static int timeout(int fd, long timeout); |
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625 static int listen(int fd, int count); |
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626 static int connect(int fd, struct sockaddr* him, socklen_t len); |
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627 static int bind(int fd, struct sockaddr* him, socklen_t len); |
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628 static int accept(int fd, struct sockaddr* him, socklen_t* len); |
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629 static int recvfrom(int fd, char* buf, size_t nbytes, uint flags, |
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630 struct sockaddr* from, socklen_t* fromlen); |
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631 static int get_sock_name(int fd, struct sockaddr* him, socklen_t* len); |
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632 static int sendto(int fd, char* buf, size_t len, uint flags, |
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633 struct sockaddr* to, socklen_t tolen); |
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634 static int socket_available(int fd, jint* pbytes); |
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635 |
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636 static int get_sock_opt(int fd, int level, int optname, |
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637 char* optval, socklen_t* optlen); |
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638 static int set_sock_opt(int fd, int level, int optname, |
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639 const char* optval, socklen_t optlen); |
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640 static int get_host_name(char* name, int namelen); |
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641 |
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642 static struct hostent* get_host_by_name(char* name); |
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643 |
0 | 644 // Support for signals (see JVM_RaiseSignal, JVM_RegisterSignal) |
645 static void signal_init(); | |
646 static void signal_init_pd(); | |
647 static void signal_notify(int signal_number); | |
648 static void* signal(int signal_number, void* handler); | |
649 static void signal_raise(int signal_number); | |
650 static int signal_wait(); | |
651 static int signal_lookup(); | |
652 static void* user_handler(); | |
653 static void terminate_signal_thread(); | |
654 static int sigexitnum_pd(); | |
655 | |
656 // random number generation | |
657 static long random(); // return 32bit pseudorandom number | |
658 static void init_random(long initval); // initialize random sequence | |
659 | |
660 // Structured OS Exception support | |
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661 static void os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, nmethod* nm, JavaCallArguments* args, Thread* thread); |
0 | 662 |
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663 // On Windows this will create an actual minidump, on Linux/Solaris it will simply check core dump limits |
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664 static void check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize); |
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665 |
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666 // Get the default path to the core file |
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667 // Returns the length of the string |
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668 static int get_core_path(char* buffer, size_t bufferSize); |
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669 |
0 | 670 // JVMTI & JVM monitoring and management support |
671 // The thread_cpu_time() and current_thread_cpu_time() are only | |
672 // supported if is_thread_cpu_time_supported() returns true. | |
673 // They are not supported on Solaris T1. | |
674 | |
675 // Thread CPU Time - return the fast estimate on a platform | |
676 // On Solaris - call gethrvtime (fast) - user time only | |
677 // On Linux - fast clock_gettime where available - user+sys | |
678 // - otherwise: very slow /proc fs - user+sys | |
679 // On Windows - GetThreadTimes - user+sys | |
680 static jlong current_thread_cpu_time(); | |
681 static jlong thread_cpu_time(Thread* t); | |
682 | |
683 // Thread CPU Time with user_sys_cpu_time parameter. | |
684 // | |
685 // If user_sys_cpu_time is true, user+sys time is returned. | |
686 // Otherwise, only user time is returned | |
687 static jlong current_thread_cpu_time(bool user_sys_cpu_time); | |
688 static jlong thread_cpu_time(Thread* t, bool user_sys_cpu_time); | |
689 | |
690 // Return a bunch of info about the timers. | |
691 // Note that the returned info for these two functions may be different | |
692 // on some platforms | |
693 static void current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
694 static void thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
695 | |
696 static bool is_thread_cpu_time_supported(); | |
697 | |
698 // System loadavg support. Returns -1 if load average cannot be obtained. | |
699 static int loadavg(double loadavg[], int nelem); | |
700 | |
701 // Hook for os specific jvm options that we don't want to abort on seeing | |
702 static bool obsolete_option(const JavaVMOption *option); | |
703 | |
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704 // Read file line by line. If line is longer than bsize, |
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705 // rest of line is skipped. Returns number of bytes read or -1 on EOF |
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706 static int get_line_chars(int fd, char *buf, const size_t bsize); |
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707 |
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708 // Extensions |
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709 #include "runtime/os_ext.hpp" |
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710 |
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711 public: |
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712 |
0 | 713 // Platform dependent stuff |
1972 | 714 #ifdef TARGET_OS_FAMILY_linux |
715 # include "os_linux.hpp" | |
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716 # include "os_posix.hpp" |
1972 | 717 #endif |
718 #ifdef TARGET_OS_FAMILY_solaris | |
719 # include "os_solaris.hpp" | |
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720 # include "os_posix.hpp" |
1972 | 721 #endif |
722 #ifdef TARGET_OS_FAMILY_windows | |
723 # include "os_windows.hpp" | |
724 #endif | |
3960 | 725 #ifdef TARGET_OS_FAMILY_bsd |
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726 # include "os_posix.hpp" |
3960 | 727 # include "os_bsd.hpp" |
728 #endif | |
1972 | 729 #ifdef TARGET_OS_ARCH_linux_x86 |
730 # include "os_linux_x86.hpp" | |
731 #endif | |
732 #ifdef TARGET_OS_ARCH_linux_sparc | |
733 # include "os_linux_sparc.hpp" | |
734 #endif | |
735 #ifdef TARGET_OS_ARCH_linux_zero | |
736 # include "os_linux_zero.hpp" | |
737 #endif | |
738 #ifdef TARGET_OS_ARCH_solaris_x86 | |
739 # include "os_solaris_x86.hpp" | |
740 #endif | |
741 #ifdef TARGET_OS_ARCH_solaris_sparc | |
742 # include "os_solaris_sparc.hpp" | |
743 #endif | |
744 #ifdef TARGET_OS_ARCH_windows_x86 | |
745 # include "os_windows_x86.hpp" | |
746 #endif | |
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747 #ifdef TARGET_OS_ARCH_linux_arm |
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748 # include "os_linux_arm.hpp" |
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749 #endif |
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750 #ifdef TARGET_OS_ARCH_linux_ppc |
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751 # include "os_linux_ppc.hpp" |
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752 #endif |
3960 | 753 #ifdef TARGET_OS_ARCH_bsd_x86 |
754 # include "os_bsd_x86.hpp" | |
755 #endif | |
756 #ifdef TARGET_OS_ARCH_bsd_zero | |
757 # include "os_bsd_zero.hpp" | |
758 #endif | |
1972 | 759 |
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760 public: |
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761 // debugging support (mostly used by debug.cpp but also fatal error handler) |
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762 static bool find(address pc, outputStream* st = tty); // OS specific function to make sense out of an address |
0 | 763 |
764 static bool dont_yield(); // when true, JVM_Yield() is nop | |
765 static void print_statistics(); | |
766 | |
767 // Thread priority helpers (implemented in OS-specific part) | |
768 static OSReturn set_native_priority(Thread* thread, int native_prio); | |
769 static OSReturn get_native_priority(const Thread* const thread, int* priority_ptr); | |
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770 static int java_to_os_priority[CriticalPriority + 1]; |
0 | 771 // Hint to the underlying OS that a task switch would not be good. |
772 // Void return because it's a hint and can fail. | |
773 static void hint_no_preempt(); | |
774 | |
775 // Used at creation if requested by the diagnostic flag PauseAtStartup. | |
776 // Causes the VM to wait until an external stimulus has been applied | |
777 // (for Unix, that stimulus is a signal, for Windows, an external | |
778 // ResumeThread call) | |
779 static void pause(); | |
780 | |
781 protected: | |
782 static long _rand_seed; // seed for random number generator | |
783 static int _processor_count; // number of processors | |
784 | |
785 static char* format_boot_path(const char* format_string, | |
786 const char* home, | |
787 int home_len, | |
788 char fileSep, | |
789 char pathSep); | |
790 static bool set_boot_path(char fileSep, char pathSep); | |
691 | 791 static char** split_path(const char* path, int* n); |
0 | 792 }; |
793 | |
794 // Note that "PAUSE" is almost always used with synchronization | |
795 // so arguably we should provide Atomic::SpinPause() instead | |
796 // of the global SpinPause() with C linkage. | |
797 // It'd also be eligible for inlining on many platforms. | |
798 | |
799 extern "C" int SpinPause () ; | |
800 extern "C" int SafeFetch32 (int * adr, int errValue) ; | |
801 extern "C" intptr_t SafeFetchN (intptr_t * adr, intptr_t errValue) ; | |
1972 | 802 |
803 #endif // SHARE_VM_RUNTIME_OS_HPP |