Mercurial > hg > truffle
annotate src/os_cpu/bsd_zero/vm/os_bsd_zero.cpp @ 17467:55fb97c4c58d hs25-b65
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
Summary: Copyright year updated for files modified during 2013
Reviewed-by: twisti, iveresov
| author | mikael |
|---|---|
| date | Tue, 24 Dec 2013 11:48:39 -0800 |
| parents | e16282db4946 |
| children | 4ca6dc0799b6 |
| rev | line source |
|---|---|
| 3960 | 1 /* |
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2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
| 3960 | 3 * Copyright 2007, 2008, 2009, 2010 Red Hat, Inc. |
| 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 5 * | |
| 6 * This code is free software; you can redistribute it and/or modify it | |
| 7 * under the terms of the GNU General Public License version 2 only, as | |
| 8 * published by the Free Software Foundation. | |
| 9 * | |
| 10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 13 * version 2 for more details (a copy is included in the LICENSE file that | |
| 14 * accompanied this code). | |
| 15 * | |
| 16 * You should have received a copy of the GNU General Public License version | |
| 17 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 19 * | |
| 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 21 * or visit www.oracle.com if you need additional information or have any | |
| 22 * questions. | |
| 23 * | |
| 24 */ | |
| 25 | |
| 6918 | 26 #if !defined(__APPLE__) && !defined(__NetBSD__) |
| 3960 | 27 #include <pthread.h> |
| 28 # include <pthread_np.h> /* For pthread_attr_get_np */ | |
| 29 #endif | |
| 30 | |
| 31 // no precompiled headers | |
| 32 #include "assembler_zero.inline.hpp" | |
| 33 #include "classfile/classLoader.hpp" | |
| 34 #include "classfile/systemDictionary.hpp" | |
| 35 #include "classfile/vmSymbols.hpp" | |
| 36 #include "code/icBuffer.hpp" | |
| 37 #include "code/vtableStubs.hpp" | |
| 38 #include "interpreter/interpreter.hpp" | |
| 39 #include "jvm_bsd.h" | |
| 40 #include "memory/allocation.inline.hpp" | |
| 41 #include "mutex_bsd.inline.hpp" | |
| 42 #include "nativeInst_zero.hpp" | |
| 43 #include "os_share_bsd.hpp" | |
| 44 #include "prims/jniFastGetField.hpp" | |
| 45 #include "prims/jvm.h" | |
| 46 #include "prims/jvm_misc.hpp" | |
| 47 #include "runtime/arguments.hpp" | |
| 48 #include "runtime/extendedPC.hpp" | |
| 49 #include "runtime/frame.inline.hpp" | |
| 50 #include "runtime/interfaceSupport.hpp" | |
| 51 #include "runtime/java.hpp" | |
| 52 #include "runtime/javaCalls.hpp" | |
| 53 #include "runtime/mutexLocker.hpp" | |
| 54 #include "runtime/osThread.hpp" | |
| 55 #include "runtime/sharedRuntime.hpp" | |
| 56 #include "runtime/stubRoutines.hpp" | |
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57 #include "runtime/thread.inline.hpp" |
| 3960 | 58 #include "runtime/timer.hpp" |
| 59 #include "utilities/events.hpp" | |
| 60 #include "utilities/vmError.hpp" | |
| 61 | |
| 62 address os::current_stack_pointer() { | |
| 63 address dummy = (address) &dummy; | |
| 64 return dummy; | |
| 65 } | |
| 66 | |
| 67 frame os::get_sender_for_C_frame(frame* fr) { | |
| 68 ShouldNotCallThis(); | |
| 12077 | 69 return frame(); |
| 3960 | 70 } |
| 71 | |
| 72 frame os::current_frame() { | |
| 73 // The only thing that calls this is the stack printing code in | |
| 74 // VMError::report: | |
| 75 // - Step 110 (printing stack bounds) uses the sp in the frame | |
| 76 // to determine the amount of free space on the stack. We | |
| 77 // set the sp to a close approximation of the real value in | |
| 78 // order to allow this step to complete. | |
| 79 // - Step 120 (printing native stack) tries to walk the stack. | |
| 80 // The frame we create has a NULL pc, which is ignored as an | |
| 81 // invalid frame. | |
| 82 frame dummy = frame(); | |
| 83 dummy.set_sp((intptr_t *) current_stack_pointer()); | |
| 84 return dummy; | |
| 85 } | |
| 86 | |
| 87 char* os::non_memory_address_word() { | |
| 88 // Must never look like an address returned by reserve_memory, | |
| 89 // even in its subfields (as defined by the CPU immediate fields, | |
| 90 // if the CPU splits constants across multiple instructions). | |
| 91 #ifdef SPARC | |
| 92 // On SPARC, 0 != %hi(any real address), because there is no | |
| 93 // allocation in the first 1Kb of the virtual address space. | |
| 94 return (char *) 0; | |
| 95 #else | |
| 96 // This is the value for x86; works pretty well for PPC too. | |
| 97 return (char *) -1; | |
| 98 #endif // SPARC | |
| 99 } | |
| 100 | |
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101 void os::initialize_thread(Thread* thr) { |
| 3960 | 102 // Nothing to do. |
| 103 } | |
| 104 | |
| 105 address os::Bsd::ucontext_get_pc(ucontext_t* uc) { | |
| 106 ShouldNotCallThis(); | |
| 12077 | 107 return NULL; |
| 3960 | 108 } |
| 109 | |
| 110 ExtendedPC os::fetch_frame_from_context(void* ucVoid, | |
| 111 intptr_t** ret_sp, | |
| 112 intptr_t** ret_fp) { | |
| 113 ShouldNotCallThis(); | |
| 12077 | 114 return ExtendedPC(); |
| 3960 | 115 } |
| 116 | |
| 117 frame os::fetch_frame_from_context(void* ucVoid) { | |
| 118 ShouldNotCallThis(); | |
| 12077 | 119 return frame(); |
| 3960 | 120 } |
| 121 | |
| 122 extern "C" JNIEXPORT int | |
| 123 JVM_handle_bsd_signal(int sig, | |
| 124 siginfo_t* info, | |
| 125 void* ucVoid, | |
| 126 int abort_if_unrecognized) { | |
| 127 ucontext_t* uc = (ucontext_t*) ucVoid; | |
| 128 | |
| 129 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
| 130 | |
| 131 SignalHandlerMark shm(t); | |
| 132 | |
| 133 // Note: it's not uncommon that JNI code uses signal/sigset to | |
| 134 // install then restore certain signal handler (e.g. to temporarily | |
| 135 // block SIGPIPE, or have a SIGILL handler when detecting CPU | |
| 136 // type). When that happens, JVM_handle_bsd_signal() might be | |
| 137 // invoked with junk info/ucVoid. To avoid unnecessary crash when | |
| 138 // libjsig is not preloaded, try handle signals that do not require | |
| 139 // siginfo/ucontext first. | |
| 140 | |
| 141 if (sig == SIGPIPE || sig == SIGXFSZ) { | |
| 142 // allow chained handler to go first | |
| 143 if (os::Bsd::chained_handler(sig, info, ucVoid)) { | |
| 144 return true; | |
| 145 } else { | |
| 146 if (PrintMiscellaneous && (WizardMode || Verbose)) { | |
| 147 char buf[64]; | |
| 148 warning("Ignoring %s - see bugs 4229104 or 646499219", | |
| 149 os::exception_name(sig, buf, sizeof(buf))); | |
| 150 } | |
| 151 return true; | |
| 152 } | |
| 153 } | |
| 154 | |
| 155 JavaThread* thread = NULL; | |
| 156 VMThread* vmthread = NULL; | |
| 157 if (os::Bsd::signal_handlers_are_installed) { | |
| 158 if (t != NULL ){ | |
| 159 if(t->is_Java_thread()) { | |
| 160 thread = (JavaThread*)t; | |
| 161 } | |
| 162 else if(t->is_VM_thread()){ | |
| 163 vmthread = (VMThread *)t; | |
| 164 } | |
| 165 } | |
| 166 } | |
| 167 | |
| 168 if (info != NULL && thread != NULL) { | |
| 169 // Handle ALL stack overflow variations here | |
| 4006 | 170 if (sig == SIGSEGV || sig == SIGBUS) { |
| 3960 | 171 address addr = (address) info->si_addr; |
| 172 | |
| 173 // check if fault address is within thread stack | |
| 174 if (addr < thread->stack_base() && | |
| 175 addr >= thread->stack_base() - thread->stack_size()) { | |
| 176 // stack overflow | |
| 177 if (thread->in_stack_yellow_zone(addr)) { | |
| 178 thread->disable_stack_yellow_zone(); | |
| 179 ShouldNotCallThis(); | |
| 180 } | |
| 181 else if (thread->in_stack_red_zone(addr)) { | |
| 182 thread->disable_stack_red_zone(); | |
| 183 ShouldNotCallThis(); | |
| 184 } | |
| 185 } | |
| 186 } | |
| 187 | |
| 188 /*if (thread->thread_state() == _thread_in_Java) { | |
| 189 ShouldNotCallThis(); | |
| 190 } | |
| 191 else*/ if (thread->thread_state() == _thread_in_vm && | |
| 192 sig == SIGBUS && thread->doing_unsafe_access()) { | |
| 193 ShouldNotCallThis(); | |
| 194 } | |
| 195 | |
| 196 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC | |
| 197 // kicks in and the heap gets shrunk before the field access. | |
| 198 /*if (sig == SIGSEGV || sig == SIGBUS) { | |
| 199 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
| 200 if (addr != (address)-1) { | |
| 201 stub = addr; | |
| 202 } | |
| 203 }*/ | |
| 204 | |
| 205 // Check to see if we caught the safepoint code in the process | |
| 206 // of write protecting the memory serialization page. It write | |
| 207 // enables the page immediately after protecting it so we can | |
| 208 // just return to retry the write. | |
| 4006 | 209 if ((sig == SIGSEGV || sig == SIGBUS) && |
| 3960 | 210 os::is_memory_serialize_page(thread, (address) info->si_addr)) { |
| 211 // Block current thread until permission is restored. | |
| 212 os::block_on_serialize_page_trap(); | |
| 213 return true; | |
| 214 } | |
| 215 } | |
| 216 | |
| 217 // signal-chaining | |
| 218 if (os::Bsd::chained_handler(sig, info, ucVoid)) { | |
| 219 return true; | |
| 220 } | |
| 221 | |
| 222 if (!abort_if_unrecognized) { | |
| 223 // caller wants another chance, so give it to him | |
| 224 return false; | |
| 225 } | |
| 226 | |
| 227 #ifndef PRODUCT | |
| 228 if (sig == SIGSEGV) { | |
| 229 fatal("\n#" | |
| 230 "\n# /--------------------\\" | |
| 231 "\n# | segmentation fault |" | |
| 232 "\n# \\---\\ /--------------/" | |
| 233 "\n# /" | |
| 234 "\n# [-] |\\_/| " | |
| 235 "\n# (+)=C |o o|__ " | |
| 236 "\n# | | =-*-=__\\ " | |
| 237 "\n# OOO c_c_(___)"); | |
| 238 } | |
| 239 #endif // !PRODUCT | |
| 240 | |
| 4006 | 241 const char *fmt = |
| 242 "caught unhandled signal " INT32_FORMAT " at address " PTR_FORMAT; | |
| 243 char buf[128]; | |
| 3960 | 244 |
| 4006 | 245 sprintf(buf, fmt, sig, info->si_addr); |
| 3960 | 246 fatal(buf); |
| 12077 | 247 return false; |
| 3960 | 248 } |
| 249 | |
| 250 void os::Bsd::init_thread_fpu_state(void) { | |
| 251 // Nothing to do | |
| 252 } | |
| 253 | |
| 254 bool os::is_allocatable(size_t bytes) { | |
| 255 #ifdef _LP64 | |
| 256 return true; | |
| 257 #else | |
| 258 if (bytes < 2 * G) { | |
| 259 return true; | |
| 260 } | |
| 261 | |
| 262 char* addr = reserve_memory(bytes, NULL); | |
| 263 | |
| 264 if (addr != NULL) { | |
| 265 release_memory(addr, bytes); | |
| 266 } | |
| 267 | |
| 268 return addr != NULL; | |
| 269 #endif // _LP64 | |
| 270 } | |
| 271 | |
| 272 /////////////////////////////////////////////////////////////////////////////// | |
| 273 // thread stack | |
| 274 | |
| 275 size_t os::Bsd::min_stack_allowed = 64 * K; | |
| 276 | |
| 277 bool os::Bsd::supports_variable_stack_size() { | |
| 278 return true; | |
| 279 } | |
| 280 | |
| 281 size_t os::Bsd::default_stack_size(os::ThreadType thr_type) { | |
| 282 #ifdef _LP64 | |
| 283 size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M); | |
| 284 #else | |
| 285 size_t s = (thr_type == os::compiler_thread ? 2 * M : 512 * K); | |
| 286 #endif // _LP64 | |
| 287 return s; | |
| 288 } | |
| 289 | |
| 290 size_t os::Bsd::default_guard_size(os::ThreadType thr_type) { | |
| 291 // Only enable glibc guard pages for non-Java threads | |
| 292 // (Java threads have HotSpot guard pages) | |
| 293 return (thr_type == java_thread ? 0 : page_size()); | |
| 294 } | |
| 295 | |
| 296 static void current_stack_region(address *bottom, size_t *size) { | |
| 297 address stack_bottom; | |
| 298 address stack_top; | |
| 299 size_t stack_bytes; | |
| 300 | |
| 301 #ifdef __APPLE__ | |
| 302 pthread_t self = pthread_self(); | |
| 303 stack_top = (address) pthread_get_stackaddr_np(self); | |
| 304 stack_bytes = pthread_get_stacksize_np(self); | |
| 305 stack_bottom = stack_top - stack_bytes; | |
| 306 #elif defined(__OpenBSD__) | |
| 307 stack_t ss; | |
| 308 int rslt = pthread_stackseg_np(pthread_self(), &ss); | |
| 309 | |
| 310 if (rslt != 0) | |
| 4006 | 311 fatal(err_msg("pthread_stackseg_np failed with err = " INT32_FORMAT, |
| 312 rslt)); | |
| 3960 | 313 |
| 314 stack_top = (address) ss.ss_sp; | |
| 315 stack_bytes = ss.ss_size; | |
| 316 stack_bottom = stack_top - stack_bytes; | |
| 6918 | 317 #else |
| 3960 | 318 pthread_attr_t attr; |
| 319 | |
| 320 int rslt = pthread_attr_init(&attr); | |
| 321 | |
| 322 // JVM needs to know exact stack location, abort if it fails | |
| 323 if (rslt != 0) | |
| 4006 | 324 fatal(err_msg("pthread_attr_init failed with err = " INT32_FORMAT, rslt)); |
| 3960 | 325 |
| 326 rslt = pthread_attr_get_np(pthread_self(), &attr); | |
| 327 | |
| 328 if (rslt != 0) | |
| 4006 | 329 fatal(err_msg("pthread_attr_get_np failed with err = " INT32_FORMAT, |
| 330 rslt)); | |
| 3960 | 331 |
| 332 if (pthread_attr_getstackaddr(&attr, (void **) &stack_bottom) != 0 || | |
| 333 pthread_attr_getstacksize(&attr, &stack_bytes) != 0) { | |
| 334 fatal("Can not locate current stack attributes!"); | |
| 335 } | |
| 336 | |
| 337 pthread_attr_destroy(&attr); | |
| 338 | |
| 339 stack_top = stack_bottom + stack_bytes; | |
| 340 #endif | |
| 341 | |
| 342 assert(os::current_stack_pointer() >= stack_bottom, "should do"); | |
| 343 assert(os::current_stack_pointer() < stack_top, "should do"); | |
| 344 | |
| 345 *bottom = stack_bottom; | |
| 346 *size = stack_top - stack_bottom; | |
| 347 } | |
| 348 | |
| 349 address os::current_stack_base() { | |
| 350 address bottom; | |
| 351 size_t size; | |
| 352 current_stack_region(&bottom, &size); | |
| 353 return bottom + size; | |
| 354 } | |
| 355 | |
| 356 size_t os::current_stack_size() { | |
| 357 // stack size includes normal stack and HotSpot guard pages | |
| 358 address bottom; | |
| 359 size_t size; | |
| 360 current_stack_region(&bottom, &size); | |
| 361 return size; | |
| 362 } | |
| 363 | |
| 364 ///////////////////////////////////////////////////////////////////////////// | |
| 365 // helper functions for fatal error handler | |
| 366 | |
| 367 void os::print_context(outputStream* st, void* context) { | |
| 368 ShouldNotCallThis(); | |
| 369 } | |
| 370 | |
| 371 void os::print_register_info(outputStream *st, void *context) { | |
| 372 ShouldNotCallThis(); | |
| 373 } | |
| 374 | |
| 375 ///////////////////////////////////////////////////////////////////////////// | |
| 376 // Stubs for things that would be in bsd_zero.s if it existed. | |
| 377 // You probably want to disassemble these monkeys to check they're ok. | |
| 378 | |
| 379 extern "C" { | |
| 380 int SpinPause() { | |
| 12077 | 381 return 1; |
| 3960 | 382 } |
| 383 | |
| 384 void _Copy_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) { | |
| 385 if (from > to) { | |
| 386 jshort *end = from + count; | |
| 387 while (from < end) | |
| 388 *(to++) = *(from++); | |
| 389 } | |
| 390 else if (from < to) { | |
| 391 jshort *end = from; | |
| 392 from += count - 1; | |
| 393 to += count - 1; | |
| 394 while (from >= end) | |
| 395 *(to--) = *(from--); | |
| 396 } | |
| 397 } | |
| 398 void _Copy_conjoint_jints_atomic(jint* from, jint* to, size_t count) { | |
| 399 if (from > to) { | |
| 400 jint *end = from + count; | |
| 401 while (from < end) | |
| 402 *(to++) = *(from++); | |
| 403 } | |
| 404 else if (from < to) { | |
| 405 jint *end = from; | |
| 406 from += count - 1; | |
| 407 to += count - 1; | |
| 408 while (from >= end) | |
| 409 *(to--) = *(from--); | |
| 410 } | |
| 411 } | |
| 412 void _Copy_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) { | |
| 413 if (from > to) { | |
| 414 jlong *end = from + count; | |
| 415 while (from < end) | |
| 416 os::atomic_copy64(from++, to++); | |
| 417 } | |
| 418 else if (from < to) { | |
| 419 jlong *end = from; | |
| 420 from += count - 1; | |
| 421 to += count - 1; | |
| 422 while (from >= end) | |
| 423 os::atomic_copy64(from--, to--); | |
| 424 } | |
| 425 } | |
| 426 | |
| 427 void _Copy_arrayof_conjoint_bytes(HeapWord* from, | |
| 428 HeapWord* to, | |
| 429 size_t count) { | |
| 430 memmove(to, from, count); | |
| 431 } | |
| 432 void _Copy_arrayof_conjoint_jshorts(HeapWord* from, | |
| 433 HeapWord* to, | |
| 434 size_t count) { | |
| 435 memmove(to, from, count * 2); | |
| 436 } | |
| 437 void _Copy_arrayof_conjoint_jints(HeapWord* from, | |
| 438 HeapWord* to, | |
| 439 size_t count) { | |
| 440 memmove(to, from, count * 4); | |
| 441 } | |
| 442 void _Copy_arrayof_conjoint_jlongs(HeapWord* from, | |
| 443 HeapWord* to, | |
| 444 size_t count) { | |
| 445 memmove(to, from, count * 8); | |
| 446 } | |
| 447 }; | |
| 448 | |
| 449 ///////////////////////////////////////////////////////////////////////////// | |
| 450 // Implementations of atomic operations not supported by processors. | |
| 451 // -- http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Atomic-Builtins.html | |
| 452 | |
| 453 #ifndef _LP64 | |
| 454 extern "C" { | |
| 455 long long unsigned int __sync_val_compare_and_swap_8( | |
| 456 volatile void *ptr, | |
| 457 long long unsigned int oldval, | |
| 458 long long unsigned int newval) { | |
| 459 ShouldNotCallThis(); | |
| 460 } | |
| 461 }; | |
| 462 #endif // !_LP64 | |
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463 |
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464 #ifndef PRODUCT |
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465 void os::verify_stack_alignment() { |
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466 } |
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467 #endif |