Wed, 17 Sep 2008 19:59:35 +0400
Merge
duke@435 | 1 | /* |
xdono@631 | 2 | * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | // os defines the interface to operating system; this includes traditional |
duke@435 | 26 | // OS services (time, I/O) as well as other functionality with system- |
duke@435 | 27 | // dependent code. |
duke@435 | 28 | |
duke@435 | 29 | typedef void (*dll_func)(...); |
duke@435 | 30 | |
duke@435 | 31 | class Thread; |
duke@435 | 32 | class JavaThread; |
duke@435 | 33 | class Event; |
duke@435 | 34 | class DLL; |
duke@435 | 35 | class FileHandle; |
iveresov@576 | 36 | template<class E> class GrowableArray; |
duke@435 | 37 | |
duke@435 | 38 | // %%%%% Moved ThreadState, START_FN, OSThread to new osThread.hpp. -- Rose |
duke@435 | 39 | |
duke@435 | 40 | // Platform-independent error return values from OS functions |
duke@435 | 41 | enum OSReturn { |
duke@435 | 42 | OS_OK = 0, // Operation was successful |
duke@435 | 43 | OS_ERR = -1, // Operation failed |
duke@435 | 44 | OS_INTRPT = -2, // Operation was interrupted |
duke@435 | 45 | OS_TIMEOUT = -3, // Operation timed out |
duke@435 | 46 | OS_NOMEM = -5, // Operation failed for lack of memory |
duke@435 | 47 | OS_NORESOURCE = -6 // Operation failed for lack of nonmemory resource |
duke@435 | 48 | }; |
duke@435 | 49 | |
duke@435 | 50 | enum ThreadPriority { // JLS 20.20.1-3 |
duke@435 | 51 | NoPriority = -1, // Initial non-priority value |
duke@435 | 52 | MinPriority = 1, // Minimum priority |
duke@435 | 53 | NormPriority = 5, // Normal (non-daemon) priority |
duke@435 | 54 | NearMaxPriority = 9, // High priority, used for VMThread |
duke@435 | 55 | MaxPriority = 10 // Highest priority, used for WatcherThread |
duke@435 | 56 | // ensures that VMThread doesn't starve profiler |
duke@435 | 57 | }; |
duke@435 | 58 | |
duke@435 | 59 | // Typedef for structured exception handling support |
duke@435 | 60 | typedef void (*java_call_t)(JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); |
duke@435 | 61 | |
duke@435 | 62 | class os: AllStatic { |
duke@435 | 63 | private: |
duke@435 | 64 | enum { page_sizes_max = 9 }; // Size of _page_sizes array (8 plus a sentinel) |
duke@435 | 65 | |
duke@435 | 66 | static OSThread* _starting_thread; |
duke@435 | 67 | static address _polling_page; |
duke@435 | 68 | static volatile int32_t * _mem_serialize_page; |
duke@435 | 69 | static uintptr_t _serialize_page_mask; |
duke@435 | 70 | static size_t _page_sizes[page_sizes_max]; |
duke@435 | 71 | |
duke@435 | 72 | static void init_page_sizes(size_t default_page_size) { |
duke@435 | 73 | _page_sizes[0] = default_page_size; |
duke@435 | 74 | _page_sizes[1] = 0; // sentinel |
duke@435 | 75 | } |
duke@435 | 76 | |
duke@435 | 77 | public: |
duke@435 | 78 | |
duke@435 | 79 | static void init(void); // Called before command line parsing |
duke@435 | 80 | static jint init_2(void); // Called after command line parsing |
duke@435 | 81 | |
duke@435 | 82 | // File names are case-insensitive on windows only |
duke@435 | 83 | // Override me as needed |
duke@435 | 84 | static int file_name_strcmp(const char* s1, const char* s2); |
duke@435 | 85 | |
duke@435 | 86 | static bool getenv(const char* name, char* buffer, int len); |
duke@435 | 87 | static bool have_special_privileges(); |
duke@435 | 88 | |
duke@435 | 89 | static jlong javaTimeMillis(); |
duke@435 | 90 | static jlong javaTimeNanos(); |
duke@435 | 91 | static void javaTimeNanos_info(jvmtiTimerInfo *info_ptr); |
duke@435 | 92 | static void run_periodic_checks(); |
duke@435 | 93 | |
duke@435 | 94 | |
duke@435 | 95 | // Returns the elapsed time in seconds since the vm started. |
duke@435 | 96 | static double elapsedTime(); |
duke@435 | 97 | |
duke@435 | 98 | // Returns real time in seconds since an arbitrary point |
duke@435 | 99 | // in the past. |
duke@435 | 100 | static bool getTimesSecs(double* process_real_time, |
duke@435 | 101 | double* process_user_time, |
duke@435 | 102 | double* process_system_time); |
duke@435 | 103 | |
duke@435 | 104 | // Interface to the performance counter |
duke@435 | 105 | static jlong elapsed_counter(); |
duke@435 | 106 | static jlong elapsed_frequency(); |
duke@435 | 107 | |
ysr@777 | 108 | // The "virtual time" of a thread is the amount of time a thread has |
ysr@777 | 109 | // actually run. The first function indicates whether the OS supports |
ysr@777 | 110 | // this functionality for the current thread, and if so: |
ysr@777 | 111 | // * the second enables vtime tracking (if that is required). |
ysr@777 | 112 | // * the third tells whether vtime is enabled. |
ysr@777 | 113 | // * the fourth returns the elapsed virtual time for the current |
ysr@777 | 114 | // thread. |
ysr@777 | 115 | static bool supports_vtime(); |
ysr@777 | 116 | static bool enable_vtime(); |
ysr@777 | 117 | static bool vtime_enabled(); |
ysr@777 | 118 | static double elapsedVTime(); |
ysr@777 | 119 | |
duke@435 | 120 | // Return current local time in a string (YYYY-MM-DD HH:MM:SS). |
duke@435 | 121 | // It is MT safe, but not async-safe, as reading time zone |
duke@435 | 122 | // information may require a lock on some platforms. |
duke@435 | 123 | static char* local_time_string(char *buf, size_t buflen); |
duke@435 | 124 | // Fill in buffer with current local time as an ISO-8601 string. |
duke@435 | 125 | // E.g., YYYY-MM-DDThh:mm:ss.mmm+zzzz. |
duke@435 | 126 | // Returns buffer, or NULL if it failed. |
duke@435 | 127 | static char* iso8601_time(char* buffer, size_t buffer_length); |
duke@435 | 128 | |
duke@435 | 129 | // Interface for detecting multiprocessor system |
duke@435 | 130 | static inline bool is_MP() { |
duke@435 | 131 | assert(_processor_count > 0, "invalid processor count"); |
duke@435 | 132 | return _processor_count > 1; |
duke@435 | 133 | } |
duke@435 | 134 | static julong available_memory(); |
duke@435 | 135 | static julong physical_memory(); |
duke@435 | 136 | static julong allocatable_physical_memory(julong size); |
duke@435 | 137 | static bool is_server_class_machine(); |
duke@435 | 138 | |
duke@435 | 139 | // number of CPUs |
duke@435 | 140 | static int processor_count() { |
duke@435 | 141 | return _processor_count; |
duke@435 | 142 | } |
duke@435 | 143 | |
duke@435 | 144 | // Returns the number of CPUs this process is currently allowed to run on. |
duke@435 | 145 | // Note that on some OSes this can change dynamically. |
duke@435 | 146 | static int active_processor_count(); |
duke@435 | 147 | |
duke@435 | 148 | // Bind processes to processors. |
duke@435 | 149 | // This is a two step procedure: |
duke@435 | 150 | // first you generate a distribution of processes to processors, |
duke@435 | 151 | // then you bind processes according to that distribution. |
duke@435 | 152 | // Compute a distribution for number of processes to processors. |
duke@435 | 153 | // Stores the processor id's into the distribution array argument. |
duke@435 | 154 | // Returns true if it worked, false if it didn't. |
duke@435 | 155 | static bool distribute_processes(uint length, uint* distribution); |
duke@435 | 156 | // Binds the current process to a processor. |
duke@435 | 157 | // Returns true if it worked, false if it didn't. |
duke@435 | 158 | static bool bind_to_processor(uint processor_id); |
duke@435 | 159 | |
duke@435 | 160 | // Interface for stack banging (predetect possible stack overflow for |
duke@435 | 161 | // exception processing) There are guard pages, and above that shadow |
duke@435 | 162 | // pages for stack overflow checking. |
duke@435 | 163 | static bool uses_stack_guard_pages(); |
duke@435 | 164 | static bool allocate_stack_guard_pages(); |
duke@435 | 165 | static void bang_stack_shadow_pages(); |
duke@435 | 166 | static bool stack_shadow_pages_available(Thread *thread, methodHandle method); |
duke@435 | 167 | |
duke@435 | 168 | // OS interface to Virtual Memory |
duke@435 | 169 | |
duke@435 | 170 | // Return the default page size. |
duke@435 | 171 | static int vm_page_size(); |
duke@435 | 172 | |
duke@435 | 173 | // Return the page size to use for a region of memory. The min_pages argument |
duke@435 | 174 | // is a hint intended to limit fragmentation; it says the returned page size |
duke@435 | 175 | // should be <= region_max_size / min_pages. Because min_pages is a hint, |
duke@435 | 176 | // this routine may return a size larger than region_max_size / min_pages. |
duke@435 | 177 | // |
duke@435 | 178 | // The current implementation ignores min_pages if a larger page size is an |
duke@435 | 179 | // exact multiple of both region_min_size and region_max_size. This allows |
duke@435 | 180 | // larger pages to be used when doing so would not cause fragmentation; in |
duke@435 | 181 | // particular, a single page can be used when region_min_size == |
duke@435 | 182 | // region_max_size == a supported page size. |
duke@435 | 183 | static size_t page_size_for_region(size_t region_min_size, |
duke@435 | 184 | size_t region_max_size, |
duke@435 | 185 | uint min_pages); |
duke@435 | 186 | |
duke@435 | 187 | // Method for tracing page sizes returned by the above method; enabled by |
duke@435 | 188 | // TracePageSizes. The region_{min,max}_size parameters should be the values |
duke@435 | 189 | // passed to page_size_for_region() and page_size should be the result of that |
duke@435 | 190 | // call. The (optional) base and size parameters should come from the |
duke@435 | 191 | // ReservedSpace base() and size() methods. |
duke@435 | 192 | static void trace_page_sizes(const char* str, const size_t region_min_size, |
duke@435 | 193 | const size_t region_max_size, |
duke@435 | 194 | const size_t page_size, |
duke@435 | 195 | const char* base = NULL, |
duke@435 | 196 | const size_t size = 0) PRODUCT_RETURN; |
duke@435 | 197 | |
duke@435 | 198 | static int vm_allocation_granularity(); |
duke@435 | 199 | static char* reserve_memory(size_t bytes, char* addr = 0, |
duke@435 | 200 | size_t alignment_hint = 0); |
duke@435 | 201 | static char* attempt_reserve_memory_at(size_t bytes, char* addr); |
duke@435 | 202 | static void split_reserved_memory(char *base, size_t size, |
duke@435 | 203 | size_t split, bool realloc); |
duke@435 | 204 | static bool commit_memory(char* addr, size_t bytes); |
duke@435 | 205 | static bool commit_memory(char* addr, size_t size, size_t alignment_hint); |
duke@435 | 206 | static bool uncommit_memory(char* addr, size_t bytes); |
duke@435 | 207 | static bool release_memory(char* addr, size_t bytes); |
coleenp@672 | 208 | |
coleenp@672 | 209 | enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX }; |
coleenp@672 | 210 | static bool protect_memory(char* addr, size_t bytes, ProtType prot, |
coleenp@672 | 211 | bool is_committed = false); |
coleenp@672 | 212 | |
duke@435 | 213 | static bool guard_memory(char* addr, size_t bytes); |
duke@435 | 214 | static bool unguard_memory(char* addr, size_t bytes); |
duke@435 | 215 | static char* map_memory(int fd, const char* file_name, size_t file_offset, |
duke@435 | 216 | char *addr, size_t bytes, bool read_only = false, |
duke@435 | 217 | bool allow_exec = false); |
duke@435 | 218 | static char* remap_memory(int fd, const char* file_name, size_t file_offset, |
duke@435 | 219 | char *addr, size_t bytes, bool read_only, |
duke@435 | 220 | bool allow_exec); |
duke@435 | 221 | static bool unmap_memory(char *addr, size_t bytes); |
duke@435 | 222 | static void free_memory(char *addr, size_t bytes); |
duke@435 | 223 | static void realign_memory(char *addr, size_t bytes, size_t alignment_hint); |
duke@435 | 224 | |
duke@435 | 225 | // NUMA-specific interface |
iveresov@576 | 226 | static bool numa_has_static_binding(); |
iveresov@576 | 227 | static bool numa_has_group_homing(); |
iveresov@576 | 228 | static void numa_make_local(char *addr, size_t bytes, int lgrp_hint); |
duke@435 | 229 | static void numa_make_global(char *addr, size_t bytes); |
duke@435 | 230 | static size_t numa_get_groups_num(); |
duke@435 | 231 | static size_t numa_get_leaf_groups(int *ids, size_t size); |
duke@435 | 232 | static bool numa_topology_changed(); |
duke@435 | 233 | static int numa_get_group_id(); |
duke@435 | 234 | |
duke@435 | 235 | // Page manipulation |
duke@435 | 236 | struct page_info { |
duke@435 | 237 | size_t size; |
duke@435 | 238 | int lgrp_id; |
duke@435 | 239 | }; |
duke@435 | 240 | static bool get_page_info(char *start, page_info* info); |
duke@435 | 241 | static char* scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found); |
duke@435 | 242 | |
duke@435 | 243 | static char* non_memory_address_word(); |
duke@435 | 244 | // reserve, commit and pin the entire memory region |
duke@435 | 245 | static char* reserve_memory_special(size_t size); |
duke@435 | 246 | static bool release_memory_special(char* addr, size_t bytes); |
duke@435 | 247 | static bool large_page_init(); |
duke@435 | 248 | static size_t large_page_size(); |
duke@435 | 249 | static bool can_commit_large_page_memory(); |
jcoomes@514 | 250 | static bool can_execute_large_page_memory(); |
duke@435 | 251 | |
duke@435 | 252 | // OS interface to polling page |
duke@435 | 253 | static address get_polling_page() { return _polling_page; } |
duke@435 | 254 | static void set_polling_page(address page) { _polling_page = page; } |
duke@435 | 255 | static bool is_poll_address(address addr) { return addr >= _polling_page && addr < (_polling_page + os::vm_page_size()); } |
duke@435 | 256 | static void make_polling_page_unreadable(); |
duke@435 | 257 | static void make_polling_page_readable(); |
duke@435 | 258 | |
duke@435 | 259 | // Routines used to serialize the thread state without using membars |
duke@435 | 260 | static void serialize_thread_states(); |
duke@435 | 261 | |
duke@435 | 262 | // Since we write to the serialize page from every thread, we |
duke@435 | 263 | // want stores to be on unique cache lines whenever possible |
duke@435 | 264 | // in order to minimize CPU cross talk. We pre-compute the |
duke@435 | 265 | // amount to shift the thread* to make this offset unique to |
duke@435 | 266 | // each thread. |
duke@435 | 267 | static int get_serialize_page_shift_count() { |
duke@435 | 268 | return SerializePageShiftCount; |
duke@435 | 269 | } |
duke@435 | 270 | |
duke@435 | 271 | static void set_serialize_page_mask(uintptr_t mask) { |
duke@435 | 272 | _serialize_page_mask = mask; |
duke@435 | 273 | } |
duke@435 | 274 | |
duke@435 | 275 | static unsigned int get_serialize_page_mask() { |
duke@435 | 276 | return _serialize_page_mask; |
duke@435 | 277 | } |
duke@435 | 278 | |
duke@435 | 279 | static void set_memory_serialize_page(address page); |
duke@435 | 280 | |
duke@435 | 281 | static address get_memory_serialize_page() { |
duke@435 | 282 | return (address)_mem_serialize_page; |
duke@435 | 283 | } |
duke@435 | 284 | |
duke@435 | 285 | static inline void write_memory_serialize_page(JavaThread *thread) { |
duke@435 | 286 | uintptr_t page_offset = ((uintptr_t)thread >> |
duke@435 | 287 | get_serialize_page_shift_count()) & |
duke@435 | 288 | get_serialize_page_mask(); |
duke@435 | 289 | *(volatile int32_t *)((uintptr_t)_mem_serialize_page+page_offset) = 1; |
duke@435 | 290 | } |
duke@435 | 291 | |
duke@435 | 292 | static bool is_memory_serialize_page(JavaThread *thread, address addr) { |
duke@435 | 293 | address thr_addr; |
duke@435 | 294 | if (UseMembar) return false; |
duke@435 | 295 | // Calculate thread specific address |
duke@435 | 296 | if (thread == NULL) return false; |
duke@435 | 297 | // TODO-FIXME: some platforms mask off faulting addresses to the base pagesize. |
duke@435 | 298 | // Instead of using a test for equality we should probably use something |
duke@435 | 299 | // of the form: |
duke@435 | 300 | // return ((_mem_serialize_page ^ addr) & -pagesize) == 0 |
duke@435 | 301 | // |
duke@435 | 302 | thr_addr = (address)(((uintptr_t)thread >> |
duke@435 | 303 | get_serialize_page_shift_count()) & |
duke@435 | 304 | get_serialize_page_mask()) + (uintptr_t)_mem_serialize_page; |
duke@435 | 305 | return (thr_addr == addr); |
duke@435 | 306 | } |
duke@435 | 307 | |
duke@435 | 308 | static void block_on_serialize_page_trap(); |
duke@435 | 309 | |
duke@435 | 310 | // threads |
duke@435 | 311 | |
duke@435 | 312 | enum ThreadType { |
duke@435 | 313 | vm_thread, |
duke@435 | 314 | cgc_thread, // Concurrent GC thread |
duke@435 | 315 | pgc_thread, // Parallel GC thread |
duke@435 | 316 | java_thread, |
duke@435 | 317 | compiler_thread, |
duke@435 | 318 | watcher_thread |
duke@435 | 319 | }; |
duke@435 | 320 | |
duke@435 | 321 | static bool create_thread(Thread* thread, |
duke@435 | 322 | ThreadType thr_type, |
duke@435 | 323 | size_t stack_size = 0); |
duke@435 | 324 | static bool create_main_thread(JavaThread* thread); |
duke@435 | 325 | static bool create_attached_thread(JavaThread* thread); |
duke@435 | 326 | static void pd_start_thread(Thread* thread); |
duke@435 | 327 | static void start_thread(Thread* thread); |
duke@435 | 328 | |
duke@435 | 329 | static void initialize_thread(); |
duke@435 | 330 | static void free_thread(OSThread* osthread); |
duke@435 | 331 | |
duke@435 | 332 | // thread id on Linux/64bit is 64bit, on Windows and Solaris, it's 32bit |
duke@435 | 333 | static intx current_thread_id(); |
duke@435 | 334 | static int current_process_id(); |
duke@435 | 335 | // hpi::read for calls from non native state |
duke@435 | 336 | // For performance, hpi::read is only callable from _thread_in_native |
duke@435 | 337 | static size_t read(int fd, void *buf, unsigned int nBytes); |
duke@435 | 338 | static int sleep(Thread* thread, jlong ms, bool interruptable); |
duke@435 | 339 | static int naked_sleep(); |
duke@435 | 340 | static void infinite_sleep(); // never returns, use with CAUTION |
duke@435 | 341 | static void yield(); // Yields to all threads with same priority |
duke@435 | 342 | enum YieldResult { |
duke@435 | 343 | YIELD_SWITCHED = 1, // caller descheduled, other ready threads exist & ran |
duke@435 | 344 | YIELD_NONEREADY = 0, // No other runnable/ready threads. |
duke@435 | 345 | // platform-specific yield return immediately |
duke@435 | 346 | YIELD_UNKNOWN = -1 // Unknown: platform doesn't support _SWITCHED or _NONEREADY |
duke@435 | 347 | // YIELD_SWITCHED and YIELD_NONREADY imply the platform supports a "strong" |
duke@435 | 348 | // yield that can be used in lieu of blocking. |
duke@435 | 349 | } ; |
duke@435 | 350 | static YieldResult NakedYield () ; |
duke@435 | 351 | static void yield_all(int attempts = 0); // Yields to all other threads including lower priority |
duke@435 | 352 | static void loop_breaker(int attempts); // called from within tight loops to possibly influence time-sharing |
duke@435 | 353 | static OSReturn set_priority(Thread* thread, ThreadPriority priority); |
duke@435 | 354 | static OSReturn get_priority(const Thread* const thread, ThreadPriority& priority); |
duke@435 | 355 | |
duke@435 | 356 | static void interrupt(Thread* thread); |
duke@435 | 357 | static bool is_interrupted(Thread* thread, bool clear_interrupted); |
duke@435 | 358 | |
duke@435 | 359 | static int pd_self_suspend_thread(Thread* thread); |
duke@435 | 360 | |
duke@435 | 361 | static ExtendedPC fetch_frame_from_context(void* ucVoid, intptr_t** sp, intptr_t** fp); |
duke@435 | 362 | static frame fetch_frame_from_context(void* ucVoid); |
duke@435 | 363 | |
duke@435 | 364 | static ExtendedPC get_thread_pc(Thread *thread); |
duke@435 | 365 | static void breakpoint(); |
duke@435 | 366 | |
duke@435 | 367 | static address current_stack_pointer(); |
duke@435 | 368 | static address current_stack_base(); |
duke@435 | 369 | static size_t current_stack_size(); |
duke@435 | 370 | |
duke@435 | 371 | static int message_box(const char* title, const char* message); |
duke@435 | 372 | static char* do_you_want_to_debug(const char* message); |
duke@435 | 373 | |
duke@435 | 374 | // run cmd in a separate process and return its exit code; or -1 on failures |
duke@435 | 375 | static int fork_and_exec(char *cmd); |
duke@435 | 376 | |
duke@435 | 377 | // Set file to send error reports. |
duke@435 | 378 | static void set_error_file(const char *logfile); |
duke@435 | 379 | |
duke@435 | 380 | // os::exit() is merged with vm_exit() |
duke@435 | 381 | // static void exit(int num); |
duke@435 | 382 | |
duke@435 | 383 | // Terminate the VM, but don't exit the process |
duke@435 | 384 | static void shutdown(); |
duke@435 | 385 | |
duke@435 | 386 | // Terminate with an error. Default is to generate a core file on platforms |
duke@435 | 387 | // that support such things. This calls shutdown() and then aborts. |
duke@435 | 388 | static void abort(bool dump_core = true); |
duke@435 | 389 | |
duke@435 | 390 | // Die immediately, no exit hook, no abort hook, no cleanup. |
duke@435 | 391 | static void die(); |
duke@435 | 392 | |
duke@435 | 393 | // Reading directories. |
duke@435 | 394 | static DIR* opendir(const char* dirname); |
duke@435 | 395 | static int readdir_buf_size(const char *path); |
duke@435 | 396 | static struct dirent* readdir(DIR* dirp, dirent* dbuf); |
duke@435 | 397 | static int closedir(DIR* dirp); |
duke@435 | 398 | |
duke@435 | 399 | // Dynamic library extension |
duke@435 | 400 | static const char* dll_file_extension(); |
duke@435 | 401 | |
duke@435 | 402 | static const char* get_temp_directory(); |
duke@435 | 403 | static const char* get_current_directory(char *buf, int buflen); |
duke@435 | 404 | |
kamg@677 | 405 | // Builds a platform-specific full library path given a ld path and lib name |
kamg@677 | 406 | static void dll_build_name(char* buffer, size_t size, |
kamg@677 | 407 | const char* pathname, const char* fname); |
kamg@677 | 408 | |
duke@435 | 409 | // Symbol lookup, find nearest function name; basically it implements |
duke@435 | 410 | // dladdr() for all platforms. Name of the nearest function is copied |
duke@435 | 411 | // to buf. Distance from its base address is returned as offset. |
duke@435 | 412 | // If function name is not found, buf[0] is set to '\0' and offset is |
duke@435 | 413 | // set to -1. |
duke@435 | 414 | static bool dll_address_to_function_name(address addr, char* buf, |
duke@435 | 415 | int buflen, int* offset); |
duke@435 | 416 | |
duke@435 | 417 | // Locate DLL/DSO. On success, full path of the library is copied to |
duke@435 | 418 | // buf, and offset is set to be the distance between addr and the |
duke@435 | 419 | // library's base address. On failure, buf[0] is set to '\0' and |
duke@435 | 420 | // offset is set to -1. |
duke@435 | 421 | static bool dll_address_to_library_name(address addr, char* buf, |
duke@435 | 422 | int buflen, int* offset); |
duke@435 | 423 | |
duke@435 | 424 | // Find out whether the pc is in the static code for jvm.dll/libjvm.so. |
duke@435 | 425 | static bool address_is_in_vm(address addr); |
duke@435 | 426 | |
duke@435 | 427 | // Loads .dll/.so and |
duke@435 | 428 | // in case of error it checks if .dll/.so was built for the |
duke@435 | 429 | // same architecture as Hotspot is running on |
duke@435 | 430 | static void* dll_load(const char *name, char *ebuf, int ebuflen); |
duke@435 | 431 | |
kamg@677 | 432 | // lookup symbol in a shared library |
kamg@677 | 433 | static void* dll_lookup(void* handle, const char* name); |
kamg@677 | 434 | |
duke@435 | 435 | // Print out system information; they are called by fatal error handler. |
duke@435 | 436 | // Output format may be different on different platforms. |
duke@435 | 437 | static void print_os_info(outputStream* st); |
duke@435 | 438 | static void print_cpu_info(outputStream* st); |
duke@435 | 439 | static void print_memory_info(outputStream* st); |
duke@435 | 440 | static void print_dll_info(outputStream* st); |
duke@435 | 441 | static void print_environment_variables(outputStream* st, const char** env_list, char* buffer, int len); |
duke@435 | 442 | static void print_context(outputStream* st, void* context); |
duke@435 | 443 | static void print_siginfo(outputStream* st, void* siginfo); |
duke@435 | 444 | static void print_signal_handlers(outputStream* st, char* buf, size_t buflen); |
duke@435 | 445 | static void print_date_and_time(outputStream* st); |
duke@435 | 446 | |
duke@435 | 447 | // The following two functions are used by fatal error handler to trace |
duke@435 | 448 | // native (C) frames. They are not part of frame.hpp/frame.cpp because |
duke@435 | 449 | // frame.hpp/cpp assume thread is JavaThread, and also because different |
duke@435 | 450 | // OS/compiler may have different convention or provide different API to |
duke@435 | 451 | // walk C frames. |
duke@435 | 452 | // |
duke@435 | 453 | // We don't attempt to become a debugger, so we only follow frames if that |
duke@435 | 454 | // does not require a lookup in the unwind table, which is part of the binary |
duke@435 | 455 | // file but may be unsafe to read after a fatal error. So on x86, we can |
duke@435 | 456 | // only walk stack if %ebp is used as frame pointer; on ia64, it's not |
duke@435 | 457 | // possible to walk C stack without having the unwind table. |
duke@435 | 458 | static bool is_first_C_frame(frame *fr); |
duke@435 | 459 | static frame get_sender_for_C_frame(frame *fr); |
duke@435 | 460 | |
duke@435 | 461 | // return current frame. pc() and sp() are set to NULL on failure. |
duke@435 | 462 | static frame current_frame(); |
duke@435 | 463 | |
duke@435 | 464 | static void print_hex_dump(outputStream* st, address start, address end, int unitsize); |
duke@435 | 465 | |
duke@435 | 466 | // returns a string to describe the exception/signal; |
duke@435 | 467 | // returns NULL if exception_code is not an OS exception/signal. |
duke@435 | 468 | static const char* exception_name(int exception_code, char* buf, size_t buflen); |
duke@435 | 469 | |
duke@435 | 470 | // Returns native Java library, loads if necessary |
duke@435 | 471 | static void* native_java_library(); |
duke@435 | 472 | |
duke@435 | 473 | // Fills in path to jvm.dll/libjvm.so (this info used to find hpi). |
duke@435 | 474 | static void jvm_path(char *buf, jint buflen); |
duke@435 | 475 | |
duke@435 | 476 | // JNI names |
duke@435 | 477 | static void print_jni_name_prefix_on(outputStream* st, int args_size); |
duke@435 | 478 | static void print_jni_name_suffix_on(outputStream* st, int args_size); |
duke@435 | 479 | |
duke@435 | 480 | // File conventions |
duke@435 | 481 | static const char* file_separator(); |
duke@435 | 482 | static const char* line_separator(); |
duke@435 | 483 | static const char* path_separator(); |
duke@435 | 484 | |
duke@435 | 485 | // Init os specific system properties values |
duke@435 | 486 | static void init_system_properties_values(); |
duke@435 | 487 | |
duke@435 | 488 | // IO operations, non-JVM_ version. |
duke@435 | 489 | static int stat(const char* path, struct stat* sbuf); |
duke@435 | 490 | static bool dir_is_empty(const char* path); |
duke@435 | 491 | |
duke@435 | 492 | // IO operations on binary files |
duke@435 | 493 | static int create_binary_file(const char* path, bool rewrite_existing); |
duke@435 | 494 | static jlong current_file_offset(int fd); |
duke@435 | 495 | static jlong seek_to_file_offset(int fd, jlong offset); |
duke@435 | 496 | |
duke@435 | 497 | // Thread Local Storage |
duke@435 | 498 | static int allocate_thread_local_storage(); |
duke@435 | 499 | static void thread_local_storage_at_put(int index, void* value); |
duke@435 | 500 | static void* thread_local_storage_at(int index); |
duke@435 | 501 | static void free_thread_local_storage(int index); |
duke@435 | 502 | |
duke@435 | 503 | // General allocation (must be MT-safe) |
duke@435 | 504 | static void* malloc (size_t size); |
duke@435 | 505 | static void* realloc (void *memblock, size_t size); |
duke@435 | 506 | static void free (void *memblock); |
duke@435 | 507 | static bool check_heap(bool force = false); // verify C heap integrity |
duke@435 | 508 | static char* strdup(const char *); // Like strdup |
duke@435 | 509 | |
duke@435 | 510 | #ifndef PRODUCT |
duke@435 | 511 | static int num_mallocs; // # of calls to malloc/realloc |
duke@435 | 512 | static size_t alloc_bytes; // # of bytes allocated |
duke@435 | 513 | static int num_frees; // # of calls to free |
duke@435 | 514 | #endif |
duke@435 | 515 | |
duke@435 | 516 | // Printing 64 bit integers |
duke@435 | 517 | static const char* jlong_format_specifier(); |
duke@435 | 518 | static const char* julong_format_specifier(); |
duke@435 | 519 | |
duke@435 | 520 | // Support for signals (see JVM_RaiseSignal, JVM_RegisterSignal) |
duke@435 | 521 | static void signal_init(); |
duke@435 | 522 | static void signal_init_pd(); |
duke@435 | 523 | static void signal_notify(int signal_number); |
duke@435 | 524 | static void* signal(int signal_number, void* handler); |
duke@435 | 525 | static void signal_raise(int signal_number); |
duke@435 | 526 | static int signal_wait(); |
duke@435 | 527 | static int signal_lookup(); |
duke@435 | 528 | static void* user_handler(); |
duke@435 | 529 | static void terminate_signal_thread(); |
duke@435 | 530 | static int sigexitnum_pd(); |
duke@435 | 531 | |
duke@435 | 532 | // random number generation |
duke@435 | 533 | static long random(); // return 32bit pseudorandom number |
duke@435 | 534 | static void init_random(long initval); // initialize random sequence |
duke@435 | 535 | |
duke@435 | 536 | // Structured OS Exception support |
duke@435 | 537 | static void os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); |
duke@435 | 538 | |
duke@435 | 539 | // JVMTI & JVM monitoring and management support |
duke@435 | 540 | // The thread_cpu_time() and current_thread_cpu_time() are only |
duke@435 | 541 | // supported if is_thread_cpu_time_supported() returns true. |
duke@435 | 542 | // They are not supported on Solaris T1. |
duke@435 | 543 | |
duke@435 | 544 | // Thread CPU Time - return the fast estimate on a platform |
duke@435 | 545 | // On Solaris - call gethrvtime (fast) - user time only |
duke@435 | 546 | // On Linux - fast clock_gettime where available - user+sys |
duke@435 | 547 | // - otherwise: very slow /proc fs - user+sys |
duke@435 | 548 | // On Windows - GetThreadTimes - user+sys |
duke@435 | 549 | static jlong current_thread_cpu_time(); |
duke@435 | 550 | static jlong thread_cpu_time(Thread* t); |
duke@435 | 551 | |
duke@435 | 552 | // Thread CPU Time with user_sys_cpu_time parameter. |
duke@435 | 553 | // |
duke@435 | 554 | // If user_sys_cpu_time is true, user+sys time is returned. |
duke@435 | 555 | // Otherwise, only user time is returned |
duke@435 | 556 | static jlong current_thread_cpu_time(bool user_sys_cpu_time); |
duke@435 | 557 | static jlong thread_cpu_time(Thread* t, bool user_sys_cpu_time); |
duke@435 | 558 | |
duke@435 | 559 | // Return a bunch of info about the timers. |
duke@435 | 560 | // Note that the returned info for these two functions may be different |
duke@435 | 561 | // on some platforms |
duke@435 | 562 | static void current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr); |
duke@435 | 563 | static void thread_cpu_time_info(jvmtiTimerInfo *info_ptr); |
duke@435 | 564 | |
duke@435 | 565 | static bool is_thread_cpu_time_supported(); |
duke@435 | 566 | |
duke@435 | 567 | // System loadavg support. Returns -1 if load average cannot be obtained. |
duke@435 | 568 | static int loadavg(double loadavg[], int nelem); |
duke@435 | 569 | |
duke@435 | 570 | // Hook for os specific jvm options that we don't want to abort on seeing |
duke@435 | 571 | static bool obsolete_option(const JavaVMOption *option); |
duke@435 | 572 | |
duke@435 | 573 | // Platform dependent stuff |
duke@435 | 574 | #include "incls/_os_pd.hpp.incl" |
duke@435 | 575 | |
duke@435 | 576 | // debugging support (mostly used by debug.cpp) |
duke@435 | 577 | static bool find(address pc) PRODUCT_RETURN0; // OS specific function to make sense out of an address |
duke@435 | 578 | |
duke@435 | 579 | static bool dont_yield(); // when true, JVM_Yield() is nop |
duke@435 | 580 | static void print_statistics(); |
duke@435 | 581 | |
duke@435 | 582 | // Thread priority helpers (implemented in OS-specific part) |
duke@435 | 583 | static OSReturn set_native_priority(Thread* thread, int native_prio); |
duke@435 | 584 | static OSReturn get_native_priority(const Thread* const thread, int* priority_ptr); |
duke@435 | 585 | static int java_to_os_priority[MaxPriority + 1]; |
duke@435 | 586 | // Hint to the underlying OS that a task switch would not be good. |
duke@435 | 587 | // Void return because it's a hint and can fail. |
duke@435 | 588 | static void hint_no_preempt(); |
duke@435 | 589 | |
duke@435 | 590 | // Used at creation if requested by the diagnostic flag PauseAtStartup. |
duke@435 | 591 | // Causes the VM to wait until an external stimulus has been applied |
duke@435 | 592 | // (for Unix, that stimulus is a signal, for Windows, an external |
duke@435 | 593 | // ResumeThread call) |
duke@435 | 594 | static void pause(); |
duke@435 | 595 | |
duke@435 | 596 | protected: |
duke@435 | 597 | static long _rand_seed; // seed for random number generator |
duke@435 | 598 | static int _processor_count; // number of processors |
duke@435 | 599 | |
duke@435 | 600 | static char* format_boot_path(const char* format_string, |
duke@435 | 601 | const char* home, |
duke@435 | 602 | int home_len, |
duke@435 | 603 | char fileSep, |
duke@435 | 604 | char pathSep); |
duke@435 | 605 | static bool set_boot_path(char fileSep, char pathSep); |
duke@435 | 606 | }; |
duke@435 | 607 | |
duke@435 | 608 | // Note that "PAUSE" is almost always used with synchronization |
duke@435 | 609 | // so arguably we should provide Atomic::SpinPause() instead |
duke@435 | 610 | // of the global SpinPause() with C linkage. |
duke@435 | 611 | // It'd also be eligible for inlining on many platforms. |
duke@435 | 612 | |
duke@435 | 613 | extern "C" int SpinPause () ; |
duke@435 | 614 | extern "C" int SafeFetch32 (int * adr, int errValue) ; |
duke@435 | 615 | extern "C" intptr_t SafeFetchN (intptr_t * adr, intptr_t errValue) ; |