Mercurial > hg > truffle
annotate src/share/vm/runtime/os.hpp @ 2368:dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
6627787: CMS: JVM refuses to start up with -Xms16m -Xmx16m
7000125: CMS: Anti-monotone young gen sizing with respect to maximum whole heap size specification
7027529: CMS: retire CMSUseOldDefaults flag
Summary: Simplify CMS heap sizing code, relying on ergonomic initial sizing consistent with other collectors for the most part, controlling only young gen sizing to rein in pause times. Make CMS young gen sizing default statically cpu-dependant. Remove inconsistencies wrt generation sizing and policy code, allowing for the fixing for 6627787 and 7000125. For 7027529, retire the flag CMSUseOldDefaults which had been introduced as a bridge from JDK 5 to JDK 6 a number of years ago.
Reviewed-by: brutisso, poonam
| author | ysr |
|---|---|
| date | Wed, 16 Mar 2011 10:37:08 -0700 |
| parents | 23ae54207126 |
| children | 677234770800 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2011, 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 | |
| 42 | |
| 0 | 43 // os defines the interface to operating system; this includes traditional |
| 44 // OS services (time, I/O) as well as other functionality with system- | |
| 45 // dependent code. | |
| 46 | |
| 47 typedef void (*dll_func)(...); | |
| 48 | |
| 49 class Thread; | |
| 50 class JavaThread; | |
| 51 class Event; | |
| 52 class DLL; | |
| 53 class FileHandle; | |
| 141 | 54 template<class E> class GrowableArray; |
| 0 | 55 |
| 56 // %%%%% Moved ThreadState, START_FN, OSThread to new osThread.hpp. -- Rose | |
| 57 | |
| 58 // Platform-independent error return values from OS functions | |
| 59 enum OSReturn { | |
| 60 OS_OK = 0, // Operation was successful | |
| 61 OS_ERR = -1, // Operation failed | |
| 62 OS_INTRPT = -2, // Operation was interrupted | |
| 63 OS_TIMEOUT = -3, // Operation timed out | |
| 64 OS_NOMEM = -5, // Operation failed for lack of memory | |
| 65 OS_NORESOURCE = -6 // Operation failed for lack of nonmemory resource | |
| 66 }; | |
| 67 | |
| 68 enum ThreadPriority { // JLS 20.20.1-3 | |
| 69 NoPriority = -1, // Initial non-priority value | |
| 70 MinPriority = 1, // Minimum priority | |
| 71 NormPriority = 5, // Normal (non-daemon) priority | |
| 72 NearMaxPriority = 9, // High priority, used for VMThread | |
| 73 MaxPriority = 10 // Highest priority, used for WatcherThread | |
| 74 // ensures that VMThread doesn't starve profiler | |
| 75 }; | |
| 76 | |
| 77 // Typedef for structured exception handling support | |
| 78 typedef void (*java_call_t)(JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); | |
| 79 | |
| 80 class os: AllStatic { | |
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81 public: |
| 0 | 82 enum { page_sizes_max = 9 }; // Size of _page_sizes array (8 plus a sentinel) |
| 83 | |
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84 private: |
| 0 | 85 static OSThread* _starting_thread; |
| 86 static address _polling_page; | |
| 87 static volatile int32_t * _mem_serialize_page; | |
| 88 static uintptr_t _serialize_page_mask; | |
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89 public: |
| 0 | 90 static size_t _page_sizes[page_sizes_max]; |
| 91 | |
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92 private: |
| 0 | 93 static void init_page_sizes(size_t default_page_size) { |
| 94 _page_sizes[0] = default_page_size; | |
| 95 _page_sizes[1] = 0; // sentinel | |
| 96 } | |
| 97 | |
| 98 public: | |
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99 |
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100 static void init(void); // Called before command line parsing |
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101 static jint init_2(void); // Called after command line parsing |
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102 static void init_3(void); // Called at the end of vm init |
| 0 | 103 |
| 104 // File names are case-insensitive on windows only | |
| 105 // Override me as needed | |
| 106 static int file_name_strcmp(const char* s1, const char* s2); | |
| 107 | |
| 108 static bool getenv(const char* name, char* buffer, int len); | |
| 109 static bool have_special_privileges(); | |
| 110 | |
| 111 static jlong javaTimeMillis(); | |
| 112 static jlong javaTimeNanos(); | |
| 113 static void javaTimeNanos_info(jvmtiTimerInfo *info_ptr); | |
| 114 static void run_periodic_checks(); | |
| 115 | |
| 116 | |
| 117 // Returns the elapsed time in seconds since the vm started. | |
| 118 static double elapsedTime(); | |
| 119 | |
| 120 // Returns real time in seconds since an arbitrary point | |
| 121 // in the past. | |
| 122 static bool getTimesSecs(double* process_real_time, | |
| 123 double* process_user_time, | |
| 124 double* process_system_time); | |
| 125 | |
| 126 // Interface to the performance counter | |
| 127 static jlong elapsed_counter(); | |
| 128 static jlong elapsed_frequency(); | |
| 129 | |
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130 // The "virtual time" of a thread is the amount of time a thread has |
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131 // actually run. The first function indicates whether the OS supports |
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132 // this functionality for the current thread, and if so: |
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133 // * the second enables vtime tracking (if that is required). |
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134 // * the third tells whether vtime is enabled. |
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135 // * the fourth returns the elapsed virtual time for the current |
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136 // thread. |
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137 static bool supports_vtime(); |
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138 static bool enable_vtime(); |
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139 static bool vtime_enabled(); |
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140 static double elapsedVTime(); |
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141 |
| 0 | 142 // Return current local time in a string (YYYY-MM-DD HH:MM:SS). |
| 143 // It is MT safe, but not async-safe, as reading time zone | |
| 144 // information may require a lock on some platforms. | |
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145 static char* local_time_string(char *buf, size_t buflen); |
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146 static struct tm* localtime_pd (const time_t* clock, struct tm* res); |
| 0 | 147 // Fill in buffer with current local time as an ISO-8601 string. |
| 148 // E.g., YYYY-MM-DDThh:mm:ss.mmm+zzzz. | |
| 149 // Returns buffer, or NULL if it failed. | |
| 150 static char* iso8601_time(char* buffer, size_t buffer_length); | |
| 151 | |
| 152 // Interface for detecting multiprocessor system | |
| 153 static inline bool is_MP() { | |
| 154 assert(_processor_count > 0, "invalid processor count"); | |
| 155 return _processor_count > 1; | |
| 156 } | |
| 157 static julong available_memory(); | |
| 158 static julong physical_memory(); | |
| 159 static julong allocatable_physical_memory(julong size); | |
| 160 static bool is_server_class_machine(); | |
| 161 | |
| 162 // number of CPUs | |
| 163 static int processor_count() { | |
| 164 return _processor_count; | |
| 165 } | |
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166 static void set_processor_count(int count) { _processor_count = count; } |
| 0 | 167 |
| 168 // Returns the number of CPUs this process is currently allowed to run on. | |
| 169 // Note that on some OSes this can change dynamically. | |
| 170 static int active_processor_count(); | |
| 171 | |
| 172 // Bind processes to processors. | |
| 173 // This is a two step procedure: | |
| 174 // first you generate a distribution of processes to processors, | |
| 175 // then you bind processes according to that distribution. | |
| 176 // Compute a distribution for number of processes to processors. | |
| 177 // Stores the processor id's into the distribution array argument. | |
| 178 // Returns true if it worked, false if it didn't. | |
| 179 static bool distribute_processes(uint length, uint* distribution); | |
| 180 // Binds the current process to a processor. | |
| 181 // Returns true if it worked, false if it didn't. | |
| 182 static bool bind_to_processor(uint processor_id); | |
| 183 | |
| 184 // Interface for stack banging (predetect possible stack overflow for | |
| 185 // exception processing) There are guard pages, and above that shadow | |
| 186 // pages for stack overflow checking. | |
| 187 static bool uses_stack_guard_pages(); | |
| 188 static bool allocate_stack_guard_pages(); | |
| 189 static void bang_stack_shadow_pages(); | |
| 190 static bool stack_shadow_pages_available(Thread *thread, methodHandle method); | |
| 191 | |
| 192 // OS interface to Virtual Memory | |
| 193 | |
| 194 // Return the default page size. | |
| 195 static int vm_page_size(); | |
| 196 | |
| 197 // Return the page size to use for a region of memory. The min_pages argument | |
| 198 // is a hint intended to limit fragmentation; it says the returned page size | |
| 199 // should be <= region_max_size / min_pages. Because min_pages is a hint, | |
| 200 // this routine may return a size larger than region_max_size / min_pages. | |
| 201 // | |
| 202 // The current implementation ignores min_pages if a larger page size is an | |
| 203 // exact multiple of both region_min_size and region_max_size. This allows | |
| 204 // larger pages to be used when doing so would not cause fragmentation; in | |
| 205 // particular, a single page can be used when region_min_size == | |
| 206 // region_max_size == a supported page size. | |
| 207 static size_t page_size_for_region(size_t region_min_size, | |
| 208 size_t region_max_size, | |
| 209 uint min_pages); | |
| 210 | |
| 211 // Method for tracing page sizes returned by the above method; enabled by | |
| 212 // TracePageSizes. The region_{min,max}_size parameters should be the values | |
| 213 // passed to page_size_for_region() and page_size should be the result of that | |
| 214 // call. The (optional) base and size parameters should come from the | |
| 215 // ReservedSpace base() and size() methods. | |
| 216 static void trace_page_sizes(const char* str, const size_t region_min_size, | |
| 217 const size_t region_max_size, | |
| 218 const size_t page_size, | |
| 219 const char* base = NULL, | |
| 220 const size_t size = 0) PRODUCT_RETURN; | |
| 221 | |
| 222 static int vm_allocation_granularity(); | |
| 223 static char* reserve_memory(size_t bytes, char* addr = 0, | |
| 224 size_t alignment_hint = 0); | |
| 225 static char* attempt_reserve_memory_at(size_t bytes, char* addr); | |
| 226 static void split_reserved_memory(char *base, size_t size, | |
| 227 size_t split, bool realloc); | |
| 656 | 228 static bool commit_memory(char* addr, size_t bytes, |
| 229 bool executable = false); | |
| 230 static bool commit_memory(char* addr, size_t size, size_t alignment_hint, | |
| 231 bool executable = false); | |
| 0 | 232 static bool uncommit_memory(char* addr, size_t bytes); |
| 233 static bool release_memory(char* addr, size_t bytes); | |
|
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234 |
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235 enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX }; |
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236 static bool protect_memory(char* addr, size_t bytes, ProtType prot, |
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237 bool is_committed = true); |
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238 |
| 0 | 239 static bool guard_memory(char* addr, size_t bytes); |
| 240 static bool unguard_memory(char* addr, size_t bytes); | |
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241 static bool create_stack_guard_pages(char* addr, size_t bytes); |
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242 static bool remove_stack_guard_pages(char* addr, size_t bytes); |
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243 |
| 0 | 244 static char* map_memory(int fd, const char* file_name, size_t file_offset, |
| 245 char *addr, size_t bytes, bool read_only = false, | |
| 246 bool allow_exec = false); | |
| 247 static char* remap_memory(int fd, const char* file_name, size_t file_offset, | |
| 248 char *addr, size_t bytes, bool read_only, | |
| 249 bool allow_exec); | |
| 250 static bool unmap_memory(char *addr, size_t bytes); | |
| 251 static void free_memory(char *addr, size_t bytes); | |
| 252 static void realign_memory(char *addr, size_t bytes, size_t alignment_hint); | |
| 253 | |
| 254 // NUMA-specific interface | |
| 141 | 255 static bool numa_has_static_binding(); |
| 256 static bool numa_has_group_homing(); | |
| 257 static void numa_make_local(char *addr, size_t bytes, int lgrp_hint); | |
| 0 | 258 static void numa_make_global(char *addr, size_t bytes); |
| 259 static size_t numa_get_groups_num(); | |
| 260 static size_t numa_get_leaf_groups(int *ids, size_t size); | |
| 261 static bool numa_topology_changed(); | |
| 262 static int numa_get_group_id(); | |
| 263 | |
| 264 // Page manipulation | |
| 265 struct page_info { | |
| 266 size_t size; | |
| 267 int lgrp_id; | |
| 268 }; | |
| 269 static bool get_page_info(char *start, page_info* info); | |
| 270 static char* scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found); | |
| 271 | |
| 272 static char* non_memory_address_word(); | |
| 273 // reserve, commit and pin the entire memory region | |
| 656 | 274 static char* reserve_memory_special(size_t size, char* addr = NULL, |
| 275 bool executable = false); | |
| 0 | 276 static bool release_memory_special(char* addr, size_t bytes); |
| 277 static bool large_page_init(); | |
| 278 static size_t large_page_size(); | |
| 279 static bool can_commit_large_page_memory(); | |
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280 static bool can_execute_large_page_memory(); |
| 0 | 281 |
| 282 // OS interface to polling page | |
| 283 static address get_polling_page() { return _polling_page; } | |
| 284 static void set_polling_page(address page) { _polling_page = page; } | |
| 285 static bool is_poll_address(address addr) { return addr >= _polling_page && addr < (_polling_page + os::vm_page_size()); } | |
| 286 static void make_polling_page_unreadable(); | |
| 287 static void make_polling_page_readable(); | |
| 288 | |
| 289 // Routines used to serialize the thread state without using membars | |
| 290 static void serialize_thread_states(); | |
| 291 | |
| 292 // Since we write to the serialize page from every thread, we | |
| 293 // want stores to be on unique cache lines whenever possible | |
| 294 // in order to minimize CPU cross talk. We pre-compute the | |
| 295 // amount to shift the thread* to make this offset unique to | |
| 296 // each thread. | |
| 297 static int get_serialize_page_shift_count() { | |
| 298 return SerializePageShiftCount; | |
| 299 } | |
| 300 | |
| 301 static void set_serialize_page_mask(uintptr_t mask) { | |
| 302 _serialize_page_mask = mask; | |
| 303 } | |
| 304 | |
| 305 static unsigned int get_serialize_page_mask() { | |
| 306 return _serialize_page_mask; | |
| 307 } | |
| 308 | |
| 309 static void set_memory_serialize_page(address page); | |
| 310 | |
| 311 static address get_memory_serialize_page() { | |
| 312 return (address)_mem_serialize_page; | |
| 313 } | |
| 314 | |
| 315 static inline void write_memory_serialize_page(JavaThread *thread) { | |
| 316 uintptr_t page_offset = ((uintptr_t)thread >> | |
| 317 get_serialize_page_shift_count()) & | |
| 318 get_serialize_page_mask(); | |
| 319 *(volatile int32_t *)((uintptr_t)_mem_serialize_page+page_offset) = 1; | |
| 320 } | |
| 321 | |
| 322 static bool is_memory_serialize_page(JavaThread *thread, address addr) { | |
| 323 if (UseMembar) return false; | |
| 1078 | 324 // Previously this function calculated the exact address of this |
| 325 // thread's serialize page, and checked if the faulting address | |
| 326 // was equal. However, some platforms mask off faulting addresses | |
| 327 // to the page size, so now we just check that the address is | |
| 328 // within the page. This makes the thread argument unnecessary, | |
| 329 // but we retain the NULL check to preserve existing behaviour. | |
| 0 | 330 if (thread == NULL) return false; |
| 1078 | 331 address page = (address) _mem_serialize_page; |
| 332 return addr >= page && addr < (page + os::vm_page_size()); | |
| 0 | 333 } |
| 334 | |
| 335 static void block_on_serialize_page_trap(); | |
| 336 | |
| 337 // threads | |
| 338 | |
| 339 enum ThreadType { | |
| 340 vm_thread, | |
| 341 cgc_thread, // Concurrent GC thread | |
| 342 pgc_thread, // Parallel GC thread | |
| 343 java_thread, | |
| 344 compiler_thread, | |
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345 watcher_thread, |
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346 os_thread |
| 0 | 347 }; |
| 348 | |
| 349 static bool create_thread(Thread* thread, | |
| 350 ThreadType thr_type, | |
| 351 size_t stack_size = 0); | |
| 352 static bool create_main_thread(JavaThread* thread); | |
| 353 static bool create_attached_thread(JavaThread* thread); | |
| 354 static void pd_start_thread(Thread* thread); | |
| 355 static void start_thread(Thread* thread); | |
| 356 | |
| 357 static void initialize_thread(); | |
| 358 static void free_thread(OSThread* osthread); | |
| 359 | |
| 360 // thread id on Linux/64bit is 64bit, on Windows and Solaris, it's 32bit | |
| 361 static intx current_thread_id(); | |
| 362 static int current_process_id(); | |
| 363 static int sleep(Thread* thread, jlong ms, bool interruptable); | |
| 364 static int naked_sleep(); | |
| 365 static void infinite_sleep(); // never returns, use with CAUTION | |
| 366 static void yield(); // Yields to all threads with same priority | |
| 367 enum YieldResult { | |
| 368 YIELD_SWITCHED = 1, // caller descheduled, other ready threads exist & ran | |
| 369 YIELD_NONEREADY = 0, // No other runnable/ready threads. | |
| 370 // platform-specific yield return immediately | |
| 371 YIELD_UNKNOWN = -1 // Unknown: platform doesn't support _SWITCHED or _NONEREADY | |
| 372 // YIELD_SWITCHED and YIELD_NONREADY imply the platform supports a "strong" | |
| 373 // yield that can be used in lieu of blocking. | |
| 374 } ; | |
| 375 static YieldResult NakedYield () ; | |
| 376 static void yield_all(int attempts = 0); // Yields to all other threads including lower priority | |
| 377 static void loop_breaker(int attempts); // called from within tight loops to possibly influence time-sharing | |
| 378 static OSReturn set_priority(Thread* thread, ThreadPriority priority); | |
| 379 static OSReturn get_priority(const Thread* const thread, ThreadPriority& priority); | |
| 380 | |
| 381 static void interrupt(Thread* thread); | |
| 382 static bool is_interrupted(Thread* thread, bool clear_interrupted); | |
| 383 | |
| 384 static int pd_self_suspend_thread(Thread* thread); | |
| 385 | |
| 386 static ExtendedPC fetch_frame_from_context(void* ucVoid, intptr_t** sp, intptr_t** fp); | |
| 387 static frame fetch_frame_from_context(void* ucVoid); | |
| 388 | |
| 389 static ExtendedPC get_thread_pc(Thread *thread); | |
| 390 static void breakpoint(); | |
| 391 | |
| 392 static address current_stack_pointer(); | |
| 393 static address current_stack_base(); | |
| 394 static size_t current_stack_size(); | |
| 395 | |
| 396 static int message_box(const char* title, const char* message); | |
| 397 static char* do_you_want_to_debug(const char* message); | |
| 398 | |
| 399 // run cmd in a separate process and return its exit code; or -1 on failures | |
| 400 static int fork_and_exec(char *cmd); | |
| 401 | |
| 402 // Set file to send error reports. | |
| 403 static void set_error_file(const char *logfile); | |
| 404 | |
| 405 // os::exit() is merged with vm_exit() | |
| 406 // static void exit(int num); | |
| 407 | |
| 408 // Terminate the VM, but don't exit the process | |
| 409 static void shutdown(); | |
| 410 | |
| 411 // Terminate with an error. Default is to generate a core file on platforms | |
| 412 // that support such things. This calls shutdown() and then aborts. | |
| 413 static void abort(bool dump_core = true); | |
| 414 | |
| 415 // Die immediately, no exit hook, no abort hook, no cleanup. | |
| 416 static void die(); | |
| 417 | |
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418 // File i/o operations |
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419 static const int default_file_open_flags(); |
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420 static int open(const char *path, int oflag, int mode); |
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421 static int close(int fd); |
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422 static jlong lseek(int fd, jlong offset, int whence); |
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423 static char* native_path(char *path); |
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424 static int ftruncate(int fd, jlong length); |
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425 static int fsync(int fd); |
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426 static int available(int fd, jlong *bytes); |
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427 |
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428 //File i/o operations |
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429 |
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430 static size_t read(int fd, void *buf, unsigned int nBytes); |
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431 static size_t restartable_read(int fd, void *buf, unsigned int nBytes); |
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432 static size_t write(int fd, const void *buf, unsigned int nBytes); |
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433 |
| 0 | 434 // Reading directories. |
| 435 static DIR* opendir(const char* dirname); | |
| 436 static int readdir_buf_size(const char *path); | |
| 437 static struct dirent* readdir(DIR* dirp, dirent* dbuf); | |
| 438 static int closedir(DIR* dirp); | |
| 439 | |
| 440 // Dynamic library extension | |
| 441 static const char* dll_file_extension(); | |
| 442 | |
| 443 static const char* get_temp_directory(); | |
| 444 static const char* get_current_directory(char *buf, int buflen); | |
| 445 | |
| 242 | 446 // Builds a platform-specific full library path given a ld path and lib name |
| 447 static void dll_build_name(char* buffer, size_t size, | |
| 448 const char* pathname, const char* fname); | |
| 449 | |
| 0 | 450 // Symbol lookup, find nearest function name; basically it implements |
| 451 // dladdr() for all platforms. Name of the nearest function is copied | |
| 452 // to buf. Distance from its base address is returned as offset. | |
| 453 // If function name is not found, buf[0] is set to '\0' and offset is | |
| 454 // set to -1. | |
| 455 static bool dll_address_to_function_name(address addr, char* buf, | |
| 456 int buflen, int* offset); | |
| 457 | |
| 458 // Locate DLL/DSO. On success, full path of the library is copied to | |
| 459 // buf, and offset is set to be the distance between addr and the | |
| 460 // library's base address. On failure, buf[0] is set to '\0' and | |
| 461 // offset is set to -1. | |
| 462 static bool dll_address_to_library_name(address addr, char* buf, | |
| 463 int buflen, int* offset); | |
| 464 | |
| 465 // Find out whether the pc is in the static code for jvm.dll/libjvm.so. | |
| 466 static bool address_is_in_vm(address addr); | |
| 467 | |
| 468 // Loads .dll/.so and | |
| 469 // in case of error it checks if .dll/.so was built for the | |
| 470 // same architecture as Hotspot is running on | |
| 471 static void* dll_load(const char *name, char *ebuf, int ebuflen); | |
| 472 | |
| 242 | 473 // lookup symbol in a shared library |
| 474 static void* dll_lookup(void* handle, const char* name); | |
| 475 | |
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476 // Unload library |
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477 static void dll_unload(void *lib); |
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478 |
| 0 | 479 // Print out system information; they are called by fatal error handler. |
| 480 // Output format may be different on different platforms. | |
| 481 static void print_os_info(outputStream* st); | |
| 482 static void print_cpu_info(outputStream* st); | |
| 483 static void print_memory_info(outputStream* st); | |
| 484 static void print_dll_info(outputStream* st); | |
| 485 static void print_environment_variables(outputStream* st, const char** env_list, char* buffer, int len); | |
| 486 static void print_context(outputStream* st, void* context); | |
| 1907 | 487 static void print_register_info(outputStream* st, void* context); |
| 0 | 488 static void print_siginfo(outputStream* st, void* siginfo); |
| 489 static void print_signal_handlers(outputStream* st, char* buf, size_t buflen); | |
| 490 static void print_date_and_time(outputStream* st); | |
| 491 | |
| 1907 | 492 static void print_location(outputStream* st, intptr_t x, bool verbose = false); |
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493 static size_t lasterror(char *buf, size_t len); |
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494 |
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495 // Determines whether the calling process is being debugged by a user-mode debugger. |
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496 static bool is_debugger_attached(); |
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497 |
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498 // wait for a key press if PauseAtExit is set |
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499 static void wait_for_keypress_at_exit(void); |
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500 |
| 0 | 501 // The following two functions are used by fatal error handler to trace |
| 502 // native (C) frames. They are not part of frame.hpp/frame.cpp because | |
| 503 // frame.hpp/cpp assume thread is JavaThread, and also because different | |
| 504 // OS/compiler may have different convention or provide different API to | |
| 505 // walk C frames. | |
| 506 // | |
| 507 // We don't attempt to become a debugger, so we only follow frames if that | |
| 508 // does not require a lookup in the unwind table, which is part of the binary | |
| 509 // file but may be unsafe to read after a fatal error. So on x86, we can | |
| 510 // only walk stack if %ebp is used as frame pointer; on ia64, it's not | |
| 511 // possible to walk C stack without having the unwind table. | |
| 512 static bool is_first_C_frame(frame *fr); | |
| 513 static frame get_sender_for_C_frame(frame *fr); | |
| 514 | |
| 515 // return current frame. pc() and sp() are set to NULL on failure. | |
| 516 static frame current_frame(); | |
| 517 | |
| 518 static void print_hex_dump(outputStream* st, address start, address end, int unitsize); | |
| 519 | |
| 520 // returns a string to describe the exception/signal; | |
| 521 // returns NULL if exception_code is not an OS exception/signal. | |
| 522 static const char* exception_name(int exception_code, char* buf, size_t buflen); | |
| 523 | |
| 524 // Returns native Java library, loads if necessary | |
| 525 static void* native_java_library(); | |
| 526 | |
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527 // Fills in path to jvm.dll/libjvm.so (used by the Disassembler) |
| 0 | 528 static void jvm_path(char *buf, jint buflen); |
| 529 | |
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530 // Returns true if we are running in a headless jre. |
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531 static bool is_headless_jre(); |
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532 |
| 0 | 533 // JNI names |
| 534 static void print_jni_name_prefix_on(outputStream* st, int args_size); | |
| 535 static void print_jni_name_suffix_on(outputStream* st, int args_size); | |
| 536 | |
| 537 // File conventions | |
| 538 static const char* file_separator(); | |
| 539 static const char* line_separator(); | |
| 540 static const char* path_separator(); | |
| 541 | |
| 542 // Init os specific system properties values | |
| 543 static void init_system_properties_values(); | |
| 544 | |
| 545 // IO operations, non-JVM_ version. | |
| 546 static int stat(const char* path, struct stat* sbuf); | |
| 547 static bool dir_is_empty(const char* path); | |
| 548 | |
| 549 // IO operations on binary files | |
| 550 static int create_binary_file(const char* path, bool rewrite_existing); | |
| 551 static jlong current_file_offset(int fd); | |
| 552 static jlong seek_to_file_offset(int fd, jlong offset); | |
| 553 | |
| 554 // Thread Local Storage | |
| 555 static int allocate_thread_local_storage(); | |
| 556 static void thread_local_storage_at_put(int index, void* value); | |
| 557 static void* thread_local_storage_at(int index); | |
| 558 static void free_thread_local_storage(int index); | |
| 559 | |
| 560 // General allocation (must be MT-safe) | |
| 561 static void* malloc (size_t size); | |
| 562 static void* realloc (void *memblock, size_t size); | |
| 563 static void free (void *memblock); | |
| 564 static bool check_heap(bool force = false); // verify C heap integrity | |
| 565 static char* strdup(const char *); // Like strdup | |
| 566 | |
| 567 #ifndef PRODUCT | |
| 2250 | 568 static julong num_mallocs; // # of calls to malloc/realloc |
| 569 static julong alloc_bytes; // # of bytes allocated | |
| 570 static julong num_frees; // # of calls to free | |
| 571 static julong free_bytes; // # of bytes freed | |
| 0 | 572 #endif |
| 573 | |
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574 // SocketInterface (ex HPI SocketInterface ) |
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575 static int socket(int domain, int type, int protocol); |
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576 static int socket_close(int fd); |
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577 static int socket_shutdown(int fd, int howto); |
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578 static int recv(int fd, char *buf, int nBytes, int flags); |
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579 static int send(int fd, char *buf, int nBytes, int flags); |
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580 static int raw_send(int fd, char *buf, int nBytes, int flags); |
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581 static int timeout(int fd, long timeout); |
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582 static int listen(int fd, int count); |
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583 static int connect(int fd, struct sockaddr *him, int len); |
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584 static int bind(int fd, struct sockaddr *him, int len); |
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585 static int accept(int fd, struct sockaddr *him, int *len); |
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586 static int recvfrom(int fd, char *buf, int nbytes, int flags, |
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587 struct sockaddr *from, int *fromlen); |
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588 static int get_sock_name(int fd, struct sockaddr *him, int *len); |
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589 static int sendto(int fd, char *buf, int len, int flags, |
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590 struct sockaddr *to, int tolen); |
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591 static int socket_available(int fd, jint *pbytes); |
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592 |
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593 static int get_sock_opt(int fd, int level, int optname, |
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594 char *optval, int* optlen); |
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595 static int set_sock_opt(int fd, int level, int optname, |
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596 const char *optval, int optlen); |
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597 static int get_host_name(char* name, int namelen); |
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598 |
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599 static struct hostent* get_host_by_name(char* name); |
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600 |
| 0 | 601 // Printing 64 bit integers |
| 602 static const char* jlong_format_specifier(); | |
| 603 static const char* julong_format_specifier(); | |
| 604 | |
| 605 // Support for signals (see JVM_RaiseSignal, JVM_RegisterSignal) | |
| 606 static void signal_init(); | |
| 607 static void signal_init_pd(); | |
| 608 static void signal_notify(int signal_number); | |
| 609 static void* signal(int signal_number, void* handler); | |
| 610 static void signal_raise(int signal_number); | |
| 611 static int signal_wait(); | |
| 612 static int signal_lookup(); | |
| 613 static void* user_handler(); | |
| 614 static void terminate_signal_thread(); | |
| 615 static int sigexitnum_pd(); | |
| 616 | |
| 617 // random number generation | |
| 618 static long random(); // return 32bit pseudorandom number | |
| 619 static void init_random(long initval); // initialize random sequence | |
| 620 | |
| 621 // Structured OS Exception support | |
| 622 static void os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); | |
| 623 | |
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624 // On Windows this will create an actual minidump, on Linux/Solaris it will simply check core dump limits |
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625 static void check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize); |
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626 |
| 0 | 627 // JVMTI & JVM monitoring and management support |
| 628 // The thread_cpu_time() and current_thread_cpu_time() are only | |
| 629 // supported if is_thread_cpu_time_supported() returns true. | |
| 630 // They are not supported on Solaris T1. | |
| 631 | |
| 632 // Thread CPU Time - return the fast estimate on a platform | |
| 633 // On Solaris - call gethrvtime (fast) - user time only | |
| 634 // On Linux - fast clock_gettime where available - user+sys | |
| 635 // - otherwise: very slow /proc fs - user+sys | |
| 636 // On Windows - GetThreadTimes - user+sys | |
| 637 static jlong current_thread_cpu_time(); | |
| 638 static jlong thread_cpu_time(Thread* t); | |
| 639 | |
| 640 // Thread CPU Time with user_sys_cpu_time parameter. | |
| 641 // | |
| 642 // If user_sys_cpu_time is true, user+sys time is returned. | |
| 643 // Otherwise, only user time is returned | |
| 644 static jlong current_thread_cpu_time(bool user_sys_cpu_time); | |
| 645 static jlong thread_cpu_time(Thread* t, bool user_sys_cpu_time); | |
| 646 | |
| 647 // Return a bunch of info about the timers. | |
| 648 // Note that the returned info for these two functions may be different | |
| 649 // on some platforms | |
| 650 static void current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
| 651 static void thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
| 652 | |
| 653 static bool is_thread_cpu_time_supported(); | |
| 654 | |
| 655 // System loadavg support. Returns -1 if load average cannot be obtained. | |
| 656 static int loadavg(double loadavg[], int nelem); | |
| 657 | |
| 658 // Hook for os specific jvm options that we don't want to abort on seeing | |
| 659 static bool obsolete_option(const JavaVMOption *option); | |
| 660 | |
| 661 // Platform dependent stuff | |
| 1972 | 662 #ifdef TARGET_OS_FAMILY_linux |
| 663 # include "os_linux.hpp" | |
| 664 #endif | |
| 665 #ifdef TARGET_OS_FAMILY_solaris | |
| 666 # include "os_solaris.hpp" | |
| 667 #endif | |
| 668 #ifdef TARGET_OS_FAMILY_windows | |
| 669 # include "os_windows.hpp" | |
| 670 #endif | |
| 671 #ifdef TARGET_OS_ARCH_linux_x86 | |
| 672 # include "os_linux_x86.hpp" | |
| 673 #endif | |
| 674 #ifdef TARGET_OS_ARCH_linux_sparc | |
| 675 # include "os_linux_sparc.hpp" | |
| 676 #endif | |
| 677 #ifdef TARGET_OS_ARCH_linux_zero | |
| 678 # include "os_linux_zero.hpp" | |
| 679 #endif | |
| 680 #ifdef TARGET_OS_ARCH_solaris_x86 | |
| 681 # include "os_solaris_x86.hpp" | |
| 682 #endif | |
| 683 #ifdef TARGET_OS_ARCH_solaris_sparc | |
| 684 # include "os_solaris_sparc.hpp" | |
| 685 #endif | |
| 686 #ifdef TARGET_OS_ARCH_windows_x86 | |
| 687 # include "os_windows_x86.hpp" | |
| 688 #endif | |
|
2192
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689 #ifdef TARGET_OS_ARCH_linux_arm |
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690 # include "os_linux_arm.hpp" |
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691 #endif |
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692 #ifdef TARGET_OS_ARCH_linux_ppc |
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693 # include "os_linux_ppc.hpp" |
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694 #endif |
| 1972 | 695 |
| 0 | 696 |
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697 // debugging support (mostly used by debug.cpp but also fatal error handler) |
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698 static bool find(address pc, outputStream* st = tty); // OS specific function to make sense out of an address |
| 0 | 699 |
| 700 static bool dont_yield(); // when true, JVM_Yield() is nop | |
| 701 static void print_statistics(); | |
| 702 | |
| 703 // Thread priority helpers (implemented in OS-specific part) | |
| 704 static OSReturn set_native_priority(Thread* thread, int native_prio); | |
| 705 static OSReturn get_native_priority(const Thread* const thread, int* priority_ptr); | |
| 706 static int java_to_os_priority[MaxPriority + 1]; | |
| 707 // Hint to the underlying OS that a task switch would not be good. | |
| 708 // Void return because it's a hint and can fail. | |
| 709 static void hint_no_preempt(); | |
| 710 | |
| 711 // Used at creation if requested by the diagnostic flag PauseAtStartup. | |
| 712 // Causes the VM to wait until an external stimulus has been applied | |
| 713 // (for Unix, that stimulus is a signal, for Windows, an external | |
| 714 // ResumeThread call) | |
| 715 static void pause(); | |
| 716 | |
| 717 protected: | |
| 718 static long _rand_seed; // seed for random number generator | |
| 719 static int _processor_count; // number of processors | |
| 720 | |
| 721 static char* format_boot_path(const char* format_string, | |
| 722 const char* home, | |
| 723 int home_len, | |
| 724 char fileSep, | |
| 725 char pathSep); | |
| 726 static bool set_boot_path(char fileSep, char pathSep); | |
| 691 | 727 static char** split_path(const char* path, int* n); |
| 0 | 728 }; |
| 729 | |
| 730 // Note that "PAUSE" is almost always used with synchronization | |
| 731 // so arguably we should provide Atomic::SpinPause() instead | |
| 732 // of the global SpinPause() with C linkage. | |
| 733 // It'd also be eligible for inlining on many platforms. | |
| 734 | |
| 735 extern "C" int SpinPause () ; | |
| 736 extern "C" int SafeFetch32 (int * adr, int errValue) ; | |
| 737 extern "C" intptr_t SafeFetchN (intptr_t * adr, intptr_t errValue) ; | |
| 1972 | 738 |
| 739 #endif // SHARE_VM_RUNTIME_OS_HPP |