Mercurial > hg > truffle
annotate src/share/vm/runtime/os.hpp @ 10246:194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
Summary: Refactor G1's hot card cache and card counts table into their own files. Simplify the card counts table, including removing the encoding of the card index in each entry. The card counts table now has a 1:1 correspondence with the cards spanned by heap. Space for the card counts table is reserved from virtual memory (rather than C heap) during JVM startup and is committed/expanded when the heap is expanded. Changes were also reviewed-by Vitaly Davidovich.
Reviewed-by: tschatzl, jmasa
author | johnc |
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date | Thu, 09 May 2013 11:16:39 -0700 |
parents | c18152e0554e |
children | f2110083203d |
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 | |
82 typedef void (*java_call_t)(JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); | |
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 | |
342
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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"); | |
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183 return _processor_count > 1 || AssumeMP; |
0 | 184 } |
185 static julong available_memory(); | |
186 static julong physical_memory(); | |
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187 static bool has_allocatable_memory_limit(julong* limit); |
0 | 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(size_t bytes, char* addr, |
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259 size_t alignment_hint, MEMFLAGS flags); |
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260 static char* reserve_memory_aligned(size_t size, size_t alignment); |
0 | 261 static char* attempt_reserve_memory_at(size_t bytes, char* addr); |
262 static void split_reserved_memory(char *base, size_t size, | |
263 size_t split, bool realloc); | |
6197 | 264 static bool commit_memory(char* addr, size_t bytes, bool executable = false); |
656 | 265 static bool commit_memory(char* addr, size_t size, size_t alignment_hint, |
266 bool executable = false); | |
0 | 267 static bool uncommit_memory(char* addr, size_t bytes); |
268 static bool release_memory(char* addr, size_t bytes); | |
237
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269 |
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270 enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX }; |
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271 static bool protect_memory(char* addr, size_t bytes, ProtType prot, |
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272 bool is_committed = true); |
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273 |
0 | 274 static bool guard_memory(char* addr, size_t bytes); |
275 static bool unguard_memory(char* addr, size_t bytes); | |
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276 static bool create_stack_guard_pages(char* addr, size_t bytes); |
6197 | 277 static bool pd_create_stack_guard_pages(char* addr, size_t bytes); |
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278 static bool remove_stack_guard_pages(char* addr, size_t bytes); |
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279 |
0 | 280 static char* map_memory(int fd, const char* file_name, size_t file_offset, |
281 char *addr, size_t bytes, bool read_only = false, | |
282 bool allow_exec = false); | |
283 static char* remap_memory(int fd, const char* file_name, size_t file_offset, | |
284 char *addr, size_t bytes, bool read_only, | |
285 bool allow_exec); | |
286 static bool unmap_memory(char *addr, size_t bytes); | |
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287 static void free_memory(char *addr, size_t bytes, size_t alignment_hint); |
0 | 288 static void realign_memory(char *addr, size_t bytes, size_t alignment_hint); |
289 | |
290 // NUMA-specific interface | |
141 | 291 static bool numa_has_static_binding(); |
292 static bool numa_has_group_homing(); | |
293 static void numa_make_local(char *addr, size_t bytes, int lgrp_hint); | |
0 | 294 static void numa_make_global(char *addr, size_t bytes); |
295 static size_t numa_get_groups_num(); | |
296 static size_t numa_get_leaf_groups(int *ids, size_t size); | |
297 static bool numa_topology_changed(); | |
298 static int numa_get_group_id(); | |
299 | |
300 // Page manipulation | |
301 struct page_info { | |
302 size_t size; | |
303 int lgrp_id; | |
304 }; | |
305 static bool get_page_info(char *start, page_info* info); | |
306 static char* scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found); | |
307 | |
308 static char* non_memory_address_word(); | |
309 // reserve, commit and pin the entire memory region | |
656 | 310 static char* reserve_memory_special(size_t size, char* addr = NULL, |
311 bool executable = false); | |
0 | 312 static bool release_memory_special(char* addr, size_t bytes); |
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313 static void large_page_init(); |
0 | 314 static size_t large_page_size(); |
315 static bool can_commit_large_page_memory(); | |
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316 static bool can_execute_large_page_memory(); |
0 | 317 |
318 // OS interface to polling page | |
319 static address get_polling_page() { return _polling_page; } | |
320 static void set_polling_page(address page) { _polling_page = page; } | |
321 static bool is_poll_address(address addr) { return addr >= _polling_page && addr < (_polling_page + os::vm_page_size()); } | |
322 static void make_polling_page_unreadable(); | |
323 static void make_polling_page_readable(); | |
324 | |
325 // Routines used to serialize the thread state without using membars | |
326 static void serialize_thread_states(); | |
327 | |
328 // Since we write to the serialize page from every thread, we | |
329 // want stores to be on unique cache lines whenever possible | |
330 // in order to minimize CPU cross talk. We pre-compute the | |
331 // amount to shift the thread* to make this offset unique to | |
332 // each thread. | |
333 static int get_serialize_page_shift_count() { | |
334 return SerializePageShiftCount; | |
335 } | |
336 | |
337 static void set_serialize_page_mask(uintptr_t mask) { | |
338 _serialize_page_mask = mask; | |
339 } | |
340 | |
341 static unsigned int get_serialize_page_mask() { | |
342 return _serialize_page_mask; | |
343 } | |
344 | |
345 static void set_memory_serialize_page(address page); | |
346 | |
347 static address get_memory_serialize_page() { | |
348 return (address)_mem_serialize_page; | |
349 } | |
350 | |
351 static inline void write_memory_serialize_page(JavaThread *thread) { | |
352 uintptr_t page_offset = ((uintptr_t)thread >> | |
353 get_serialize_page_shift_count()) & | |
354 get_serialize_page_mask(); | |
355 *(volatile int32_t *)((uintptr_t)_mem_serialize_page+page_offset) = 1; | |
356 } | |
357 | |
358 static bool is_memory_serialize_page(JavaThread *thread, address addr) { | |
359 if (UseMembar) return false; | |
1078 | 360 // Previously this function calculated the exact address of this |
361 // thread's serialize page, and checked if the faulting address | |
362 // was equal. However, some platforms mask off faulting addresses | |
363 // to the page size, so now we just check that the address is | |
364 // within the page. This makes the thread argument unnecessary, | |
365 // but we retain the NULL check to preserve existing behaviour. | |
0 | 366 if (thread == NULL) return false; |
1078 | 367 address page = (address) _mem_serialize_page; |
368 return addr >= page && addr < (page + os::vm_page_size()); | |
0 | 369 } |
370 | |
371 static void block_on_serialize_page_trap(); | |
372 | |
373 // threads | |
374 | |
375 enum ThreadType { | |
376 vm_thread, | |
377 cgc_thread, // Concurrent GC thread | |
378 pgc_thread, // Parallel GC thread | |
379 java_thread, | |
380 compiler_thread, | |
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381 watcher_thread, |
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382 os_thread |
0 | 383 }; |
384 | |
385 static bool create_thread(Thread* thread, | |
386 ThreadType thr_type, | |
387 size_t stack_size = 0); | |
388 static bool create_main_thread(JavaThread* thread); | |
389 static bool create_attached_thread(JavaThread* thread); | |
390 static void pd_start_thread(Thread* thread); | |
391 static void start_thread(Thread* thread); | |
392 | |
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393 static void initialize_thread(Thread* thr); |
0 | 394 static void free_thread(OSThread* osthread); |
395 | |
396 // thread id on Linux/64bit is 64bit, on Windows and Solaris, it's 32bit | |
397 static intx current_thread_id(); | |
398 static int current_process_id(); | |
399 static int sleep(Thread* thread, jlong ms, bool interruptable); | |
400 static int naked_sleep(); | |
401 static void infinite_sleep(); // never returns, use with CAUTION | |
402 static void yield(); // Yields to all threads with same priority | |
403 enum YieldResult { | |
404 YIELD_SWITCHED = 1, // caller descheduled, other ready threads exist & ran | |
405 YIELD_NONEREADY = 0, // No other runnable/ready threads. | |
406 // platform-specific yield return immediately | |
407 YIELD_UNKNOWN = -1 // Unknown: platform doesn't support _SWITCHED or _NONEREADY | |
408 // YIELD_SWITCHED and YIELD_NONREADY imply the platform supports a "strong" | |
409 // yield that can be used in lieu of blocking. | |
410 } ; | |
411 static YieldResult NakedYield () ; | |
412 static void yield_all(int attempts = 0); // Yields to all other threads including lower priority | |
413 static void loop_breaker(int attempts); // called from within tight loops to possibly influence time-sharing | |
414 static OSReturn set_priority(Thread* thread, ThreadPriority priority); | |
415 static OSReturn get_priority(const Thread* const thread, ThreadPriority& priority); | |
416 | |
417 static void interrupt(Thread* thread); | |
418 static bool is_interrupted(Thread* thread, bool clear_interrupted); | |
419 | |
420 static int pd_self_suspend_thread(Thread* thread); | |
421 | |
422 static ExtendedPC fetch_frame_from_context(void* ucVoid, intptr_t** sp, intptr_t** fp); | |
423 static frame fetch_frame_from_context(void* ucVoid); | |
424 | |
425 static ExtendedPC get_thread_pc(Thread *thread); | |
426 static void breakpoint(); | |
427 | |
428 static address current_stack_pointer(); | |
429 static address current_stack_base(); | |
430 static size_t current_stack_size(); | |
431 | |
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432 static void verify_stack_alignment() PRODUCT_RETURN; |
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433 |
0 | 434 static int message_box(const char* title, const char* message); |
435 static char* do_you_want_to_debug(const char* message); | |
436 | |
437 // run cmd in a separate process and return its exit code; or -1 on failures | |
438 static int fork_and_exec(char *cmd); | |
439 | |
440 // Set file to send error reports. | |
441 static void set_error_file(const char *logfile); | |
442 | |
443 // os::exit() is merged with vm_exit() | |
444 // static void exit(int num); | |
445 | |
446 // Terminate the VM, but don't exit the process | |
447 static void shutdown(); | |
448 | |
449 // Terminate with an error. Default is to generate a core file on platforms | |
450 // that support such things. This calls shutdown() and then aborts. | |
451 static void abort(bool dump_core = true); | |
452 | |
453 // Die immediately, no exit hook, no abort hook, no cleanup. | |
454 static void die(); | |
455 | |
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456 // File i/o operations |
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457 static const int default_file_open_flags(); |
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458 static int open(const char *path, int oflag, int mode); |
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459 static FILE* open(int fd, const char* mode); |
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460 static int close(int fd); |
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461 static jlong lseek(int fd, jlong offset, int whence); |
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462 static char* native_path(char *path); |
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463 static int ftruncate(int fd, jlong length); |
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464 static int fsync(int fd); |
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465 static int available(int fd, jlong *bytes); |
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466 |
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467 //File i/o operations |
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468 |
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469 static size_t read(int fd, void *buf, unsigned int nBytes); |
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470 static size_t restartable_read(int fd, void *buf, unsigned int nBytes); |
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471 static size_t write(int fd, const void *buf, unsigned int nBytes); |
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472 |
0 | 473 // Reading directories. |
474 static DIR* opendir(const char* dirname); | |
475 static int readdir_buf_size(const char *path); | |
476 static struct dirent* readdir(DIR* dirp, dirent* dbuf); | |
477 static int closedir(DIR* dirp); | |
478 | |
479 // Dynamic library extension | |
480 static const char* dll_file_extension(); | |
481 | |
482 static const char* get_temp_directory(); | |
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483 static const char* get_current_directory(char *buf, size_t buflen); |
0 | 484 |
242 | 485 // Builds a platform-specific full library path given a ld path and lib name |
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486 // Returns true if buffer contains full path to existing file, false otherwise |
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487 static bool dll_build_name(char* buffer, size_t size, |
242 | 488 const char* pathname, const char* fname); |
489 | |
0 | 490 // Symbol lookup, find nearest function name; basically it implements |
491 // dladdr() for all platforms. Name of the nearest function is copied | |
492 // to buf. Distance from its base address is returned as offset. | |
493 // If function name is not found, buf[0] is set to '\0' and offset is | |
494 // set to -1. | |
495 static bool dll_address_to_function_name(address addr, char* buf, | |
496 int buflen, int* offset); | |
497 | |
498 // Locate DLL/DSO. On success, full path of the library is copied to | |
499 // buf, and offset is set to be the distance between addr and the | |
500 // library's base address. On failure, buf[0] is set to '\0' and | |
501 // offset is set to -1. | |
502 static bool dll_address_to_library_name(address addr, char* buf, | |
503 int buflen, int* offset); | |
504 | |
505 // Find out whether the pc is in the static code for jvm.dll/libjvm.so. | |
506 static bool address_is_in_vm(address addr); | |
507 | |
508 // Loads .dll/.so and | |
509 // in case of error it checks if .dll/.so was built for the | |
510 // same architecture as Hotspot is running on | |
511 static void* dll_load(const char *name, char *ebuf, int ebuflen); | |
512 | |
242 | 513 // lookup symbol in a shared library |
514 static void* dll_lookup(void* handle, const char* name); | |
515 | |
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516 // Unload library |
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517 static void dll_unload(void *lib); |
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518 |
0 | 519 // Print out system information; they are called by fatal error handler. |
520 // Output format may be different on different platforms. | |
521 static void print_os_info(outputStream* st); | |
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522 static void print_os_info_brief(outputStream* st); |
0 | 523 static void print_cpu_info(outputStream* st); |
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524 static void pd_print_cpu_info(outputStream* st); |
0 | 525 static void print_memory_info(outputStream* st); |
526 static void print_dll_info(outputStream* st); | |
527 static void print_environment_variables(outputStream* st, const char** env_list, char* buffer, int len); | |
528 static void print_context(outputStream* st, void* context); | |
1907 | 529 static void print_register_info(outputStream* st, void* context); |
0 | 530 static void print_siginfo(outputStream* st, void* siginfo); |
531 static void print_signal_handlers(outputStream* st, char* buf, size_t buflen); | |
532 static void print_date_and_time(outputStream* st); | |
533 | |
1907 | 534 static void print_location(outputStream* st, intptr_t x, bool verbose = false); |
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535 static size_t lasterror(char *buf, size_t len); |
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536 static int get_last_error(); |
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537 |
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538 // Determines whether the calling process is being debugged by a user-mode debugger. |
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539 static bool is_debugger_attached(); |
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540 |
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541 // wait for a key press if PauseAtExit is set |
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542 static void wait_for_keypress_at_exit(void); |
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543 |
0 | 544 // The following two functions are used by fatal error handler to trace |
545 // native (C) frames. They are not part of frame.hpp/frame.cpp because | |
546 // frame.hpp/cpp assume thread is JavaThread, and also because different | |
547 // OS/compiler may have different convention or provide different API to | |
548 // walk C frames. | |
549 // | |
550 // We don't attempt to become a debugger, so we only follow frames if that | |
551 // does not require a lookup in the unwind table, which is part of the binary | |
552 // file but may be unsafe to read after a fatal error. So on x86, we can | |
553 // only walk stack if %ebp is used as frame pointer; on ia64, it's not | |
554 // possible to walk C stack without having the unwind table. | |
555 static bool is_first_C_frame(frame *fr); | |
556 static frame get_sender_for_C_frame(frame *fr); | |
557 | |
558 // return current frame. pc() and sp() are set to NULL on failure. | |
559 static frame current_frame(); | |
560 | |
561 static void print_hex_dump(outputStream* st, address start, address end, int unitsize); | |
562 | |
563 // returns a string to describe the exception/signal; | |
564 // returns NULL if exception_code is not an OS exception/signal. | |
565 static const char* exception_name(int exception_code, char* buf, size_t buflen); | |
566 | |
567 // Returns native Java library, loads if necessary | |
568 static void* native_java_library(); | |
569 | |
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570 // Fills in path to jvm.dll/libjvm.so (used by the Disassembler) |
0 | 571 static void jvm_path(char *buf, jint buflen); |
572 | |
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573 // Returns true if we are running in a headless jre. |
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574 static bool is_headless_jre(); |
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575 |
0 | 576 // JNI names |
577 static void print_jni_name_prefix_on(outputStream* st, int args_size); | |
578 static void print_jni_name_suffix_on(outputStream* st, int args_size); | |
579 | |
580 // File conventions | |
581 static const char* file_separator(); | |
582 static const char* line_separator(); | |
583 static const char* path_separator(); | |
584 | |
585 // Init os specific system properties values | |
586 static void init_system_properties_values(); | |
587 | |
588 // IO operations, non-JVM_ version. | |
589 static int stat(const char* path, struct stat* sbuf); | |
590 static bool dir_is_empty(const char* path); | |
591 | |
592 // IO operations on binary files | |
593 static int create_binary_file(const char* path, bool rewrite_existing); | |
594 static jlong current_file_offset(int fd); | |
595 static jlong seek_to_file_offset(int fd, jlong offset); | |
596 | |
597 // Thread Local Storage | |
598 static int allocate_thread_local_storage(); | |
599 static void thread_local_storage_at_put(int index, void* value); | |
600 static void* thread_local_storage_at(int index); | |
601 static void free_thread_local_storage(int index); | |
602 | |
6197 | 603 // Stack walk |
604 static address get_caller_pc(int n = 0); | |
605 | |
0 | 606 // General allocation (must be MT-safe) |
6197 | 607 static void* malloc (size_t size, MEMFLAGS flags, address caller_pc = 0); |
608 static void* realloc (void *memblock, size_t size, MEMFLAGS flags, address caller_pc = 0); | |
609 static void free (void *memblock, MEMFLAGS flags = mtNone); | |
0 | 610 static bool check_heap(bool force = false); // verify C heap integrity |
6197 | 611 static char* strdup(const char *, MEMFLAGS flags = mtInternal); // Like strdup |
0 | 612 |
613 #ifndef PRODUCT | |
2250 | 614 static julong num_mallocs; // # of calls to malloc/realloc |
615 static julong alloc_bytes; // # of bytes allocated | |
616 static julong num_frees; // # of calls to free | |
617 static julong free_bytes; // # of bytes freed | |
0 | 618 #endif |
619 | |
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620 // SocketInterface (ex HPI SocketInterface ) |
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621 static int socket(int domain, int type, int protocol); |
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622 static int socket_close(int fd); |
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623 static int socket_shutdown(int fd, int howto); |
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624 static int recv(int fd, char* buf, size_t nBytes, uint flags); |
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625 static int send(int fd, char* buf, size_t nBytes, uint flags); |
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626 static int raw_send(int fd, char* buf, size_t nBytes, uint flags); |
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627 static int timeout(int fd, long timeout); |
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628 static int listen(int fd, int count); |
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629 static int connect(int fd, struct sockaddr* him, socklen_t len); |
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630 static int bind(int fd, struct sockaddr* him, socklen_t len); |
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631 static int accept(int fd, struct sockaddr* him, socklen_t* len); |
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632 static int recvfrom(int fd, char* buf, size_t nbytes, uint flags, |
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633 struct sockaddr* from, socklen_t* fromlen); |
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634 static int get_sock_name(int fd, struct sockaddr* him, socklen_t* len); |
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635 static int sendto(int fd, char* buf, size_t len, uint flags, |
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636 struct sockaddr* to, socklen_t tolen); |
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637 static int socket_available(int fd, jint* pbytes); |
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638 |
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639 static int get_sock_opt(int fd, int level, int optname, |
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640 char* optval, socklen_t* optlen); |
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641 static int set_sock_opt(int fd, int level, int optname, |
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642 const char* optval, socklen_t optlen); |
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643 static int get_host_name(char* name, int namelen); |
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644 |
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645 static struct hostent* get_host_by_name(char* name); |
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646 |
0 | 647 // Support for signals (see JVM_RaiseSignal, JVM_RegisterSignal) |
648 static void signal_init(); | |
649 static void signal_init_pd(); | |
650 static void signal_notify(int signal_number); | |
651 static void* signal(int signal_number, void* handler); | |
652 static void signal_raise(int signal_number); | |
653 static int signal_wait(); | |
654 static int signal_lookup(); | |
655 static void* user_handler(); | |
656 static void terminate_signal_thread(); | |
657 static int sigexitnum_pd(); | |
658 | |
659 // random number generation | |
660 static long random(); // return 32bit pseudorandom number | |
661 static void init_random(long initval); // initialize random sequence | |
662 | |
663 // Structured OS Exception support | |
664 static void os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); | |
665 | |
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666 // On Windows this will create an actual minidump, on Linux/Solaris it will simply check core dump limits |
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667 static void check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize); |
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668 |
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669 // Get the default path to the core file |
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670 // Returns the length of the string |
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671 static int get_core_path(char* buffer, size_t bufferSize); |
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672 |
0 | 673 // JVMTI & JVM monitoring and management support |
674 // The thread_cpu_time() and current_thread_cpu_time() are only | |
675 // supported if is_thread_cpu_time_supported() returns true. | |
676 // They are not supported on Solaris T1. | |
677 | |
678 // Thread CPU Time - return the fast estimate on a platform | |
679 // On Solaris - call gethrvtime (fast) - user time only | |
680 // On Linux - fast clock_gettime where available - user+sys | |
681 // - otherwise: very slow /proc fs - user+sys | |
682 // On Windows - GetThreadTimes - user+sys | |
683 static jlong current_thread_cpu_time(); | |
684 static jlong thread_cpu_time(Thread* t); | |
685 | |
686 // Thread CPU Time with user_sys_cpu_time parameter. | |
687 // | |
688 // If user_sys_cpu_time is true, user+sys time is returned. | |
689 // Otherwise, only user time is returned | |
690 static jlong current_thread_cpu_time(bool user_sys_cpu_time); | |
691 static jlong thread_cpu_time(Thread* t, bool user_sys_cpu_time); | |
692 | |
693 // Return a bunch of info about the timers. | |
694 // Note that the returned info for these two functions may be different | |
695 // on some platforms | |
696 static void current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
697 static void thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
698 | |
699 static bool is_thread_cpu_time_supported(); | |
700 | |
701 // System loadavg support. Returns -1 if load average cannot be obtained. | |
702 static int loadavg(double loadavg[], int nelem); | |
703 | |
704 // Hook for os specific jvm options that we don't want to abort on seeing | |
705 static bool obsolete_option(const JavaVMOption *option); | |
706 | |
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707 // Read file line by line. If line is longer than bsize, |
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708 // rest of line is skipped. Returns number of bytes read or -1 on EOF |
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709 static int get_line_chars(int fd, char *buf, const size_t bsize); |
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710 |
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711 // Extensions |
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712 #include "runtime/os_ext.hpp" |
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713 |
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714 public: |
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715 |
0 | 716 // Platform dependent stuff |
1972 | 717 #ifdef TARGET_OS_FAMILY_linux |
718 # include "os_linux.hpp" | |
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719 # include "os_posix.hpp" |
1972 | 720 #endif |
721 #ifdef TARGET_OS_FAMILY_solaris | |
722 # include "os_solaris.hpp" | |
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723 # include "os_posix.hpp" |
1972 | 724 #endif |
725 #ifdef TARGET_OS_FAMILY_windows | |
726 # include "os_windows.hpp" | |
727 #endif | |
3960 | 728 #ifdef TARGET_OS_FAMILY_bsd |
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729 # include "os_posix.hpp" |
3960 | 730 # include "os_bsd.hpp" |
731 #endif | |
1972 | 732 #ifdef TARGET_OS_ARCH_linux_x86 |
733 # include "os_linux_x86.hpp" | |
734 #endif | |
735 #ifdef TARGET_OS_ARCH_linux_sparc | |
736 # include "os_linux_sparc.hpp" | |
737 #endif | |
738 #ifdef TARGET_OS_ARCH_linux_zero | |
739 # include "os_linux_zero.hpp" | |
740 #endif | |
741 #ifdef TARGET_OS_ARCH_solaris_x86 | |
742 # include "os_solaris_x86.hpp" | |
743 #endif | |
744 #ifdef TARGET_OS_ARCH_solaris_sparc | |
745 # include "os_solaris_sparc.hpp" | |
746 #endif | |
747 #ifdef TARGET_OS_ARCH_windows_x86 | |
748 # include "os_windows_x86.hpp" | |
749 #endif | |
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750 #ifdef TARGET_OS_ARCH_linux_arm |
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751 # include "os_linux_arm.hpp" |
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752 #endif |
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753 #ifdef TARGET_OS_ARCH_linux_ppc |
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754 # include "os_linux_ppc.hpp" |
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755 #endif |
3960 | 756 #ifdef TARGET_OS_ARCH_bsd_x86 |
757 # include "os_bsd_x86.hpp" | |
758 #endif | |
759 #ifdef TARGET_OS_ARCH_bsd_zero | |
760 # include "os_bsd_zero.hpp" | |
761 #endif | |
1972 | 762 |
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763 public: |
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764 // debugging support (mostly used by debug.cpp but also fatal error handler) |
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765 static bool find(address pc, outputStream* st = tty); // OS specific function to make sense out of an address |
0 | 766 |
767 static bool dont_yield(); // when true, JVM_Yield() is nop | |
768 static void print_statistics(); | |
769 | |
770 // Thread priority helpers (implemented in OS-specific part) | |
771 static OSReturn set_native_priority(Thread* thread, int native_prio); | |
772 static OSReturn get_native_priority(const Thread* const thread, int* priority_ptr); | |
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773 static int java_to_os_priority[CriticalPriority + 1]; |
0 | 774 // Hint to the underlying OS that a task switch would not be good. |
775 // Void return because it's a hint and can fail. | |
776 static void hint_no_preempt(); | |
777 | |
778 // Used at creation if requested by the diagnostic flag PauseAtStartup. | |
779 // Causes the VM to wait until an external stimulus has been applied | |
780 // (for Unix, that stimulus is a signal, for Windows, an external | |
781 // ResumeThread call) | |
782 static void pause(); | |
783 | |
784 protected: | |
785 static long _rand_seed; // seed for random number generator | |
786 static int _processor_count; // number of processors | |
787 | |
788 static char* format_boot_path(const char* format_string, | |
789 const char* home, | |
790 int home_len, | |
791 char fileSep, | |
792 char pathSep); | |
793 static bool set_boot_path(char fileSep, char pathSep); | |
691 | 794 static char** split_path(const char* path, int* n); |
0 | 795 }; |
796 | |
797 // Note that "PAUSE" is almost always used with synchronization | |
798 // so arguably we should provide Atomic::SpinPause() instead | |
799 // of the global SpinPause() with C linkage. | |
800 // It'd also be eligible for inlining on many platforms. | |
801 | |
802 extern "C" int SpinPause () ; | |
803 extern "C" int SafeFetch32 (int * adr, int errValue) ; | |
804 extern "C" intptr_t SafeFetchN (intptr_t * adr, intptr_t errValue) ; | |
1972 | 805 |
806 #endif // SHARE_VM_RUNTIME_OS_HPP |