Mercurial > hg > truffle
annotate src/share/vm/runtime/os.hpp @ 6862:8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
Summary: Change the type of various task num fields, parameters etc to unsigned and rename them to be more consistent with the other collectors. Code changes were also reviewed by Vitaly Davidovich.
Reviewed-by: johnc
Contributed-by: Kaushik Srenevasan <kaushik@twitter.com>
| author | johnc |
|---|---|
| date | Sat, 06 Oct 2012 01:17:44 -0700 |
| parents | 716e6ef4482a |
| children | e522a00b91aa 6cb0d32b828b |
| rev | line source |
|---|---|
| 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 | |
| 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 | |
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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); | |
| 258 static char* attempt_reserve_memory_at(size_t bytes, char* addr); | |
| 259 static void split_reserved_memory(char *base, size_t size, | |
| 260 size_t split, bool realloc); | |
| 6197 | 261 static bool commit_memory(char* addr, size_t bytes, bool executable = false); |
| 656 | 262 static bool commit_memory(char* addr, size_t size, size_t alignment_hint, |
| 263 bool executable = false); | |
| 0 | 264 static bool uncommit_memory(char* addr, size_t bytes); |
| 265 static bool release_memory(char* addr, size_t bytes); | |
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266 |
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267 enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX }; |
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268 static bool protect_memory(char* addr, size_t bytes, ProtType prot, |
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269 bool is_committed = true); |
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270 |
| 0 | 271 static bool guard_memory(char* addr, size_t bytes); |
| 272 static bool unguard_memory(char* addr, size_t bytes); | |
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273 static bool create_stack_guard_pages(char* addr, size_t bytes); |
| 6197 | 274 static bool pd_create_stack_guard_pages(char* addr, size_t bytes); |
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275 static bool remove_stack_guard_pages(char* addr, size_t bytes); |
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276 |
| 0 | 277 static char* map_memory(int fd, const char* file_name, size_t file_offset, |
| 278 char *addr, size_t bytes, bool read_only = false, | |
| 279 bool allow_exec = false); | |
| 280 static char* remap_memory(int fd, const char* file_name, size_t file_offset, | |
| 281 char *addr, size_t bytes, bool read_only, | |
| 282 bool allow_exec); | |
| 283 static bool unmap_memory(char *addr, size_t bytes); | |
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284 static void free_memory(char *addr, size_t bytes, size_t alignment_hint); |
| 0 | 285 static void realign_memory(char *addr, size_t bytes, size_t alignment_hint); |
| 286 | |
| 287 // NUMA-specific interface | |
| 141 | 288 static bool numa_has_static_binding(); |
| 289 static bool numa_has_group_homing(); | |
| 290 static void numa_make_local(char *addr, size_t bytes, int lgrp_hint); | |
| 0 | 291 static void numa_make_global(char *addr, size_t bytes); |
| 292 static size_t numa_get_groups_num(); | |
| 293 static size_t numa_get_leaf_groups(int *ids, size_t size); | |
| 294 static bool numa_topology_changed(); | |
| 295 static int numa_get_group_id(); | |
| 296 | |
| 297 // Page manipulation | |
| 298 struct page_info { | |
| 299 size_t size; | |
| 300 int lgrp_id; | |
| 301 }; | |
| 302 static bool get_page_info(char *start, page_info* info); | |
| 303 static char* scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found); | |
| 304 | |
| 305 static char* non_memory_address_word(); | |
| 306 // reserve, commit and pin the entire memory region | |
| 656 | 307 static char* reserve_memory_special(size_t size, char* addr = NULL, |
| 308 bool executable = false); | |
| 0 | 309 static bool release_memory_special(char* addr, size_t bytes); |
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310 static void large_page_init(); |
| 0 | 311 static size_t large_page_size(); |
| 312 static bool can_commit_large_page_memory(); | |
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313 static bool can_execute_large_page_memory(); |
| 0 | 314 |
| 315 // OS interface to polling page | |
| 316 static address get_polling_page() { return _polling_page; } | |
| 317 static void set_polling_page(address page) { _polling_page = page; } | |
| 318 static bool is_poll_address(address addr) { return addr >= _polling_page && addr < (_polling_page + os::vm_page_size()); } | |
| 319 static void make_polling_page_unreadable(); | |
| 320 static void make_polling_page_readable(); | |
| 321 | |
| 322 // Routines used to serialize the thread state without using membars | |
| 323 static void serialize_thread_states(); | |
| 324 | |
| 325 // Since we write to the serialize page from every thread, we | |
| 326 // want stores to be on unique cache lines whenever possible | |
| 327 // in order to minimize CPU cross talk. We pre-compute the | |
| 328 // amount to shift the thread* to make this offset unique to | |
| 329 // each thread. | |
| 330 static int get_serialize_page_shift_count() { | |
| 331 return SerializePageShiftCount; | |
| 332 } | |
| 333 | |
| 334 static void set_serialize_page_mask(uintptr_t mask) { | |
| 335 _serialize_page_mask = mask; | |
| 336 } | |
| 337 | |
| 338 static unsigned int get_serialize_page_mask() { | |
| 339 return _serialize_page_mask; | |
| 340 } | |
| 341 | |
| 342 static void set_memory_serialize_page(address page); | |
| 343 | |
| 344 static address get_memory_serialize_page() { | |
| 345 return (address)_mem_serialize_page; | |
| 346 } | |
| 347 | |
| 348 static inline void write_memory_serialize_page(JavaThread *thread) { | |
| 349 uintptr_t page_offset = ((uintptr_t)thread >> | |
| 350 get_serialize_page_shift_count()) & | |
| 351 get_serialize_page_mask(); | |
| 352 *(volatile int32_t *)((uintptr_t)_mem_serialize_page+page_offset) = 1; | |
| 353 } | |
| 354 | |
| 355 static bool is_memory_serialize_page(JavaThread *thread, address addr) { | |
| 356 if (UseMembar) return false; | |
| 1078 | 357 // Previously this function calculated the exact address of this |
| 358 // thread's serialize page, and checked if the faulting address | |
| 359 // was equal. However, some platforms mask off faulting addresses | |
| 360 // to the page size, so now we just check that the address is | |
| 361 // within the page. This makes the thread argument unnecessary, | |
| 362 // but we retain the NULL check to preserve existing behaviour. | |
| 0 | 363 if (thread == NULL) return false; |
| 1078 | 364 address page = (address) _mem_serialize_page; |
| 365 return addr >= page && addr < (page + os::vm_page_size()); | |
| 0 | 366 } |
| 367 | |
| 368 static void block_on_serialize_page_trap(); | |
| 369 | |
| 370 // threads | |
| 371 | |
| 372 enum ThreadType { | |
| 373 vm_thread, | |
| 374 cgc_thread, // Concurrent GC thread | |
| 375 pgc_thread, // Parallel GC thread | |
| 376 java_thread, | |
| 377 compiler_thread, | |
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378 watcher_thread, |
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379 os_thread |
| 0 | 380 }; |
| 381 | |
| 382 static bool create_thread(Thread* thread, | |
| 383 ThreadType thr_type, | |
| 384 size_t stack_size = 0); | |
| 385 static bool create_main_thread(JavaThread* thread); | |
| 386 static bool create_attached_thread(JavaThread* thread); | |
| 387 static void pd_start_thread(Thread* thread); | |
| 388 static void start_thread(Thread* thread); | |
| 389 | |
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390 static void initialize_thread(Thread* thr); |
| 0 | 391 static void free_thread(OSThread* osthread); |
| 392 | |
| 393 // thread id on Linux/64bit is 64bit, on Windows and Solaris, it's 32bit | |
| 394 static intx current_thread_id(); | |
| 395 static int current_process_id(); | |
| 396 static int sleep(Thread* thread, jlong ms, bool interruptable); | |
| 397 static int naked_sleep(); | |
| 398 static void infinite_sleep(); // never returns, use with CAUTION | |
| 399 static void yield(); // Yields to all threads with same priority | |
| 400 enum YieldResult { | |
| 401 YIELD_SWITCHED = 1, // caller descheduled, other ready threads exist & ran | |
| 402 YIELD_NONEREADY = 0, // No other runnable/ready threads. | |
| 403 // platform-specific yield return immediately | |
| 404 YIELD_UNKNOWN = -1 // Unknown: platform doesn't support _SWITCHED or _NONEREADY | |
| 405 // YIELD_SWITCHED and YIELD_NONREADY imply the platform supports a "strong" | |
| 406 // yield that can be used in lieu of blocking. | |
| 407 } ; | |
| 408 static YieldResult NakedYield () ; | |
| 409 static void yield_all(int attempts = 0); // Yields to all other threads including lower priority | |
| 410 static void loop_breaker(int attempts); // called from within tight loops to possibly influence time-sharing | |
| 411 static OSReturn set_priority(Thread* thread, ThreadPriority priority); | |
| 412 static OSReturn get_priority(const Thread* const thread, ThreadPriority& priority); | |
| 413 | |
| 414 static void interrupt(Thread* thread); | |
| 415 static bool is_interrupted(Thread* thread, bool clear_interrupted); | |
| 416 | |
| 417 static int pd_self_suspend_thread(Thread* thread); | |
| 418 | |
| 419 static ExtendedPC fetch_frame_from_context(void* ucVoid, intptr_t** sp, intptr_t** fp); | |
| 420 static frame fetch_frame_from_context(void* ucVoid); | |
| 421 | |
| 422 static ExtendedPC get_thread_pc(Thread *thread); | |
| 423 static void breakpoint(); | |
| 424 | |
| 425 static address current_stack_pointer(); | |
| 426 static address current_stack_base(); | |
| 427 static size_t current_stack_size(); | |
| 428 | |
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429 static void verify_stack_alignment() PRODUCT_RETURN; |
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430 |
| 0 | 431 static int message_box(const char* title, const char* message); |
| 432 static char* do_you_want_to_debug(const char* message); | |
| 433 | |
| 434 // run cmd in a separate process and return its exit code; or -1 on failures | |
| 435 static int fork_and_exec(char *cmd); | |
| 436 | |
| 437 // Set file to send error reports. | |
| 438 static void set_error_file(const char *logfile); | |
| 439 | |
| 440 // os::exit() is merged with vm_exit() | |
| 441 // static void exit(int num); | |
| 442 | |
| 443 // Terminate the VM, but don't exit the process | |
| 444 static void shutdown(); | |
| 445 | |
| 446 // Terminate with an error. Default is to generate a core file on platforms | |
| 447 // that support such things. This calls shutdown() and then aborts. | |
| 448 static void abort(bool dump_core = true); | |
| 449 | |
| 450 // Die immediately, no exit hook, no abort hook, no cleanup. | |
| 451 static void die(); | |
| 452 | |
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453 // File i/o operations |
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454 static const int default_file_open_flags(); |
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455 static int open(const char *path, int oflag, int mode); |
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456 static int close(int fd); |
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457 static jlong lseek(int fd, jlong offset, int whence); |
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458 static char* native_path(char *path); |
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459 static int ftruncate(int fd, jlong length); |
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460 static int fsync(int fd); |
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461 static int available(int fd, jlong *bytes); |
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462 |
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463 //File i/o operations |
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464 |
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465 static size_t read(int fd, void *buf, unsigned int nBytes); |
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466 static size_t restartable_read(int fd, void *buf, unsigned int nBytes); |
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467 static size_t write(int fd, const void *buf, unsigned int nBytes); |
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468 |
| 0 | 469 // Reading directories. |
| 470 static DIR* opendir(const char* dirname); | |
| 471 static int readdir_buf_size(const char *path); | |
| 472 static struct dirent* readdir(DIR* dirp, dirent* dbuf); | |
| 473 static int closedir(DIR* dirp); | |
| 474 | |
| 475 // Dynamic library extension | |
| 476 static const char* dll_file_extension(); | |
| 477 | |
| 478 static const char* get_temp_directory(); | |
| 479 static const char* get_current_directory(char *buf, int buflen); | |
| 480 | |
| 242 | 481 // Builds a platform-specific full library path given a ld path and lib name |
| 482 static void dll_build_name(char* buffer, size_t size, | |
| 483 const char* pathname, const char* fname); | |
| 484 | |
| 0 | 485 // Symbol lookup, find nearest function name; basically it implements |
| 486 // dladdr() for all platforms. Name of the nearest function is copied | |
| 487 // to buf. Distance from its base address is returned as offset. | |
| 488 // If function name is not found, buf[0] is set to '\0' and offset is | |
| 489 // set to -1. | |
| 490 static bool dll_address_to_function_name(address addr, char* buf, | |
| 491 int buflen, int* offset); | |
| 492 | |
| 493 // Locate DLL/DSO. On success, full path of the library is copied to | |
| 494 // buf, and offset is set to be the distance between addr and the | |
| 495 // library's base address. On failure, buf[0] is set to '\0' and | |
| 496 // offset is set to -1. | |
| 497 static bool dll_address_to_library_name(address addr, char* buf, | |
| 498 int buflen, int* offset); | |
| 499 | |
| 500 // Find out whether the pc is in the static code for jvm.dll/libjvm.so. | |
| 501 static bool address_is_in_vm(address addr); | |
| 502 | |
| 503 // Loads .dll/.so and | |
| 504 // in case of error it checks if .dll/.so was built for the | |
| 505 // same architecture as Hotspot is running on | |
| 506 static void* dll_load(const char *name, char *ebuf, int ebuflen); | |
| 507 | |
| 242 | 508 // lookup symbol in a shared library |
| 509 static void* dll_lookup(void* handle, const char* name); | |
| 510 | |
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511 // Unload library |
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512 static void dll_unload(void *lib); |
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513 |
| 0 | 514 // Print out system information; they are called by fatal error handler. |
| 515 // Output format may be different on different platforms. | |
| 516 static void print_os_info(outputStream* st); | |
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517 static void print_os_info_brief(outputStream* st); |
| 0 | 518 static void print_cpu_info(outputStream* st); |
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519 static void pd_print_cpu_info(outputStream* st); |
| 0 | 520 static void print_memory_info(outputStream* st); |
| 521 static void print_dll_info(outputStream* st); | |
| 522 static void print_environment_variables(outputStream* st, const char** env_list, char* buffer, int len); | |
| 523 static void print_context(outputStream* st, void* context); | |
| 1907 | 524 static void print_register_info(outputStream* st, void* context); |
| 0 | 525 static void print_siginfo(outputStream* st, void* siginfo); |
| 526 static void print_signal_handlers(outputStream* st, char* buf, size_t buflen); | |
| 527 static void print_date_and_time(outputStream* st); | |
| 528 | |
| 1907 | 529 static void print_location(outputStream* st, intptr_t x, bool verbose = false); |
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530 static size_t lasterror(char *buf, size_t len); |
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531 static int get_last_error(); |
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532 |
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533 // Determines whether the calling process is being debugged by a user-mode debugger. |
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534 static bool is_debugger_attached(); |
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535 |
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536 // wait for a key press if PauseAtExit is set |
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537 static void wait_for_keypress_at_exit(void); |
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538 |
| 0 | 539 // The following two functions are used by fatal error handler to trace |
| 540 // native (C) frames. They are not part of frame.hpp/frame.cpp because | |
| 541 // frame.hpp/cpp assume thread is JavaThread, and also because different | |
| 542 // OS/compiler may have different convention or provide different API to | |
| 543 // walk C frames. | |
| 544 // | |
| 545 // We don't attempt to become a debugger, so we only follow frames if that | |
| 546 // does not require a lookup in the unwind table, which is part of the binary | |
| 547 // file but may be unsafe to read after a fatal error. So on x86, we can | |
| 548 // only walk stack if %ebp is used as frame pointer; on ia64, it's not | |
| 549 // possible to walk C stack without having the unwind table. | |
| 550 static bool is_first_C_frame(frame *fr); | |
| 551 static frame get_sender_for_C_frame(frame *fr); | |
| 552 | |
| 553 // return current frame. pc() and sp() are set to NULL on failure. | |
| 554 static frame current_frame(); | |
| 555 | |
| 556 static void print_hex_dump(outputStream* st, address start, address end, int unitsize); | |
| 557 | |
| 558 // returns a string to describe the exception/signal; | |
| 559 // returns NULL if exception_code is not an OS exception/signal. | |
| 560 static const char* exception_name(int exception_code, char* buf, size_t buflen); | |
| 561 | |
| 562 // Returns native Java library, loads if necessary | |
| 563 static void* native_java_library(); | |
| 564 | |
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565 // Fills in path to jvm.dll/libjvm.so (used by the Disassembler) |
| 0 | 566 static void jvm_path(char *buf, jint buflen); |
| 567 | |
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568 // Returns true if we are running in a headless jre. |
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569 static bool is_headless_jre(); |
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570 |
| 0 | 571 // JNI names |
| 572 static void print_jni_name_prefix_on(outputStream* st, int args_size); | |
| 573 static void print_jni_name_suffix_on(outputStream* st, int args_size); | |
| 574 | |
| 575 // File conventions | |
| 576 static const char* file_separator(); | |
| 577 static const char* line_separator(); | |
| 578 static const char* path_separator(); | |
| 579 | |
| 580 // Init os specific system properties values | |
| 581 static void init_system_properties_values(); | |
| 582 | |
| 583 // IO operations, non-JVM_ version. | |
| 584 static int stat(const char* path, struct stat* sbuf); | |
| 585 static bool dir_is_empty(const char* path); | |
| 586 | |
| 587 // IO operations on binary files | |
| 588 static int create_binary_file(const char* path, bool rewrite_existing); | |
| 589 static jlong current_file_offset(int fd); | |
| 590 static jlong seek_to_file_offset(int fd, jlong offset); | |
| 591 | |
| 592 // Thread Local Storage | |
| 593 static int allocate_thread_local_storage(); | |
| 594 static void thread_local_storage_at_put(int index, void* value); | |
| 595 static void* thread_local_storage_at(int index); | |
| 596 static void free_thread_local_storage(int index); | |
| 597 | |
| 6197 | 598 // Stack walk |
| 599 static address get_caller_pc(int n = 0); | |
| 600 | |
| 0 | 601 // General allocation (must be MT-safe) |
| 6197 | 602 static void* malloc (size_t size, MEMFLAGS flags, address caller_pc = 0); |
| 603 static void* realloc (void *memblock, size_t size, MEMFLAGS flags, address caller_pc = 0); | |
| 604 static void free (void *memblock, MEMFLAGS flags = mtNone); | |
| 0 | 605 static bool check_heap(bool force = false); // verify C heap integrity |
| 6197 | 606 static char* strdup(const char *, MEMFLAGS flags = mtInternal); // Like strdup |
| 0 | 607 |
| 608 #ifndef PRODUCT | |
| 2250 | 609 static julong num_mallocs; // # of calls to malloc/realloc |
| 610 static julong alloc_bytes; // # of bytes allocated | |
| 611 static julong num_frees; // # of calls to free | |
| 612 static julong free_bytes; // # of bytes freed | |
| 0 | 613 #endif |
| 614 | |
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615 // SocketInterface (ex HPI SocketInterface ) |
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616 static int socket(int domain, int type, int protocol); |
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617 static int socket_close(int fd); |
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618 static int socket_shutdown(int fd, int howto); |
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619 static int recv(int fd, char* buf, size_t nBytes, uint flags); |
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620 static int send(int fd, char* buf, size_t nBytes, uint flags); |
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621 static int raw_send(int fd, char* buf, size_t nBytes, uint flags); |
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622 static int timeout(int fd, long timeout); |
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623 static int listen(int fd, int count); |
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624 static int connect(int fd, struct sockaddr* him, socklen_t len); |
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625 static int bind(int fd, struct sockaddr* him, socklen_t len); |
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626 static int accept(int fd, struct sockaddr* him, socklen_t* len); |
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627 static int recvfrom(int fd, char* buf, size_t nbytes, uint flags, |
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628 struct sockaddr* from, socklen_t* fromlen); |
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629 static int get_sock_name(int fd, struct sockaddr* him, socklen_t* len); |
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630 static int sendto(int fd, char* buf, size_t len, uint flags, |
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631 struct sockaddr* to, socklen_t tolen); |
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632 static int socket_available(int fd, jint* pbytes); |
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633 |
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634 static int get_sock_opt(int fd, int level, int optname, |
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635 char* optval, socklen_t* optlen); |
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636 static int set_sock_opt(int fd, int level, int optname, |
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637 const char* optval, socklen_t optlen); |
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638 static int get_host_name(char* name, int namelen); |
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639 |
|
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640 static struct hostent* get_host_by_name(char* name); |
|
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641 |
| 0 | 642 // Printing 64 bit integers |
| 643 static const char* jlong_format_specifier(); | |
| 644 static const char* julong_format_specifier(); | |
| 645 | |
| 646 // Support for signals (see JVM_RaiseSignal, JVM_RegisterSignal) | |
| 647 static void signal_init(); | |
| 648 static void signal_init_pd(); | |
| 649 static void signal_notify(int signal_number); | |
| 650 static void* signal(int signal_number, void* handler); | |
| 651 static void signal_raise(int signal_number); | |
| 652 static int signal_wait(); | |
| 653 static int signal_lookup(); | |
| 654 static void* user_handler(); | |
| 655 static void terminate_signal_thread(); | |
| 656 static int sigexitnum_pd(); | |
| 657 | |
| 658 // random number generation | |
| 659 static long random(); // return 32bit pseudorandom number | |
| 660 static void init_random(long initval); // initialize random sequence | |
| 661 | |
| 662 // Structured OS Exception support | |
| 663 static void os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); | |
| 664 | |
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665 // On Windows this will create an actual minidump, on Linux/Solaris it will simply check core dump limits |
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666 static void check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize); |
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667 |
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668 // Get the default path to the core file |
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669 // Returns the length of the string |
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670 static int get_core_path(char* buffer, size_t bufferSize); |
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671 |
| 0 | 672 // JVMTI & JVM monitoring and management support |
| 673 // The thread_cpu_time() and current_thread_cpu_time() are only | |
| 674 // supported if is_thread_cpu_time_supported() returns true. | |
| 675 // They are not supported on Solaris T1. | |
| 676 | |
| 677 // Thread CPU Time - return the fast estimate on a platform | |
| 678 // On Solaris - call gethrvtime (fast) - user time only | |
| 679 // On Linux - fast clock_gettime where available - user+sys | |
| 680 // - otherwise: very slow /proc fs - user+sys | |
| 681 // On Windows - GetThreadTimes - user+sys | |
| 682 static jlong current_thread_cpu_time(); | |
| 683 static jlong thread_cpu_time(Thread* t); | |
| 684 | |
| 685 // Thread CPU Time with user_sys_cpu_time parameter. | |
| 686 // | |
| 687 // If user_sys_cpu_time is true, user+sys time is returned. | |
| 688 // Otherwise, only user time is returned | |
| 689 static jlong current_thread_cpu_time(bool user_sys_cpu_time); | |
| 690 static jlong thread_cpu_time(Thread* t, bool user_sys_cpu_time); | |
| 691 | |
| 692 // Return a bunch of info about the timers. | |
| 693 // Note that the returned info for these two functions may be different | |
| 694 // on some platforms | |
| 695 static void current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
| 696 static void thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
| 697 | |
| 698 static bool is_thread_cpu_time_supported(); | |
| 699 | |
| 700 // System loadavg support. Returns -1 if load average cannot be obtained. | |
| 701 static int loadavg(double loadavg[], int nelem); | |
| 702 | |
| 703 // Hook for os specific jvm options that we don't want to abort on seeing | |
| 704 static bool obsolete_option(const JavaVMOption *option); | |
| 705 | |
|
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706 // Read file line by line. If line is longer than bsize, |
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707 // rest of line is skipped. Returns number of bytes read or -1 on EOF |
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708 static int get_line_chars(int fd, char *buf, const size_t bsize); |
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709 |
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710 // Extensions |
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711 #include "runtime/os_ext.hpp" |
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712 |
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713 public: |
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714 |
| 0 | 715 // Platform dependent stuff |
| 1972 | 716 #ifdef TARGET_OS_FAMILY_linux |
| 717 # include "os_linux.hpp" | |
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718 # include "os_posix.hpp" |
| 1972 | 719 #endif |
| 720 #ifdef TARGET_OS_FAMILY_solaris | |
| 721 # include "os_solaris.hpp" | |
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722 # include "os_posix.hpp" |
| 1972 | 723 #endif |
| 724 #ifdef TARGET_OS_FAMILY_windows | |
| 725 # include "os_windows.hpp" | |
| 726 #endif | |
| 3960 | 727 #ifdef TARGET_OS_FAMILY_bsd |
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728 # include "os_posix.hpp" |
| 3960 | 729 # include "os_bsd.hpp" |
| 730 #endif | |
| 1972 | 731 #ifdef TARGET_OS_ARCH_linux_x86 |
| 732 # include "os_linux_x86.hpp" | |
| 733 #endif | |
| 734 #ifdef TARGET_OS_ARCH_linux_sparc | |
| 735 # include "os_linux_sparc.hpp" | |
| 736 #endif | |
| 737 #ifdef TARGET_OS_ARCH_linux_zero | |
| 738 # include "os_linux_zero.hpp" | |
| 739 #endif | |
| 740 #ifdef TARGET_OS_ARCH_solaris_x86 | |
| 741 # include "os_solaris_x86.hpp" | |
| 742 #endif | |
| 743 #ifdef TARGET_OS_ARCH_solaris_sparc | |
| 744 # include "os_solaris_sparc.hpp" | |
| 745 #endif | |
| 746 #ifdef TARGET_OS_ARCH_windows_x86 | |
| 747 # include "os_windows_x86.hpp" | |
| 748 #endif | |
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749 #ifdef TARGET_OS_ARCH_linux_arm |
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750 # include "os_linux_arm.hpp" |
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751 #endif |
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752 #ifdef TARGET_OS_ARCH_linux_ppc |
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753 # include "os_linux_ppc.hpp" |
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754 #endif |
| 3960 | 755 #ifdef TARGET_OS_ARCH_bsd_x86 |
| 756 # include "os_bsd_x86.hpp" | |
| 757 #endif | |
| 758 #ifdef TARGET_OS_ARCH_bsd_zero | |
| 759 # include "os_bsd_zero.hpp" | |
| 760 #endif | |
| 1972 | 761 |
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762 public: |
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763 // debugging support (mostly used by debug.cpp but also fatal error handler) |
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764 static bool find(address pc, outputStream* st = tty); // OS specific function to make sense out of an address |
| 0 | 765 |
| 766 static bool dont_yield(); // when true, JVM_Yield() is nop | |
| 767 static void print_statistics(); | |
| 768 | |
| 769 // Thread priority helpers (implemented in OS-specific part) | |
| 770 static OSReturn set_native_priority(Thread* thread, int native_prio); | |
| 771 static OSReturn get_native_priority(const Thread* const thread, int* priority_ptr); | |
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772 static int java_to_os_priority[CriticalPriority + 1]; |
| 0 | 773 // Hint to the underlying OS that a task switch would not be good. |
| 774 // Void return because it's a hint and can fail. | |
| 775 static void hint_no_preempt(); | |
| 776 | |
| 777 // Used at creation if requested by the diagnostic flag PauseAtStartup. | |
| 778 // Causes the VM to wait until an external stimulus has been applied | |
| 779 // (for Unix, that stimulus is a signal, for Windows, an external | |
| 780 // ResumeThread call) | |
| 781 static void pause(); | |
| 782 | |
| 783 protected: | |
| 784 static long _rand_seed; // seed for random number generator | |
| 785 static int _processor_count; // number of processors | |
| 786 | |
| 787 static char* format_boot_path(const char* format_string, | |
| 788 const char* home, | |
| 789 int home_len, | |
| 790 char fileSep, | |
| 791 char pathSep); | |
| 792 static bool set_boot_path(char fileSep, char pathSep); | |
| 691 | 793 static char** split_path(const char* path, int* n); |
| 0 | 794 }; |
| 795 | |
| 796 // Note that "PAUSE" is almost always used with synchronization | |
| 797 // so arguably we should provide Atomic::SpinPause() instead | |
| 798 // of the global SpinPause() with C linkage. | |
| 799 // It'd also be eligible for inlining on many platforms. | |
| 800 | |
| 801 extern "C" int SpinPause () ; | |
| 802 extern "C" int SafeFetch32 (int * adr, int errValue) ; | |
| 803 extern "C" intptr_t SafeFetchN (intptr_t * adr, intptr_t errValue) ; | |
| 1972 | 804 |
| 805 #endif // SHARE_VM_RUNTIME_OS_HPP |