1 /* 2 * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 // no precompiled headers 26 #include "asm/macroAssembler.hpp" 27 #include "macroAssembler_sparc.hpp" 28 #include "classfile/classLoader.hpp" 29 #include "classfile/systemDictionary.hpp" 30 #include "classfile/vmSymbols.hpp" 31 #include "code/codeCache.hpp" 32 #include "code/icBuffer.hpp" 33 #include "code/vtableStubs.hpp" 34 #include "interpreter/interpreter.hpp" 35 #include "jvm_solaris.h" 36 #include "memory/allocation.inline.hpp" 37 #include "mutex_solaris.inline.hpp" 38 #include "nativeInst_sparc.hpp" 39 #include "os_share_solaris.hpp" 40 #include "prims/jniFastGetField.hpp" 41 #include "prims/jvm.h" 42 #include "prims/jvm_misc.hpp" 43 #include "runtime/arguments.hpp" 44 #include "runtime/extendedPC.hpp" 45 #include "runtime/frame.inline.hpp" 46 #include "runtime/interfaceSupport.hpp" 47 #include "runtime/java.hpp" 48 #include "runtime/javaCalls.hpp" 49 #include "runtime/mutexLocker.hpp" 50 #include "runtime/osThread.hpp" 51 #include "runtime/sharedRuntime.hpp" 52 #include "runtime/stubRoutines.hpp" 53 #include "runtime/thread.inline.hpp" 54 #include "runtime/timer.hpp" 55 #include "utilities/events.hpp" 56 #include "utilities/vmError.hpp" 57 58 # include <signal.h> // needed first to avoid name collision for "std" with SC 5.0 59 60 // put OS-includes here 61 # include <sys/types.h> 62 # include <sys/mman.h> 63 # include <pthread.h> 64 # include <errno.h> 65 # include <dlfcn.h> 66 # include <stdio.h> 67 # include <unistd.h> 68 # include <sys/resource.h> 69 # include <thread.h> 70 # include <sys/stat.h> 71 # include <sys/time.h> 72 # include <sys/filio.h> 73 # include <sys/utsname.h> 74 # include <sys/systeminfo.h> 75 # include <sys/socket.h> 76 # include <sys/lwp.h> 77 # include <poll.h> 78 # include <sys/lwp.h> 79 80 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 81 # include <sys/procfs.h> // see comment in <sys/procfs.h> 82 83 #define MAX_PATH (2 * K) 84 85 // Minimum stack size for the VM. It's easier to document a constant 86 // but it's different for x86 and sparc because the page sizes are different. 87 #ifdef _LP64 88 size_t os::Solaris::min_stack_allowed = 128*K; 89 #else 90 size_t os::Solaris::min_stack_allowed = 96*K; 91 #endif 92 93 int os::Solaris::max_register_window_saves_before_flushing() { 94 // We should detect this at run time. For now, filling 95 // in with a constant. 96 return 8; 97 } 98 99 static void handle_unflushed_register_windows(gwindows_t *win) { 100 int restore_count = win->wbcnt; 101 int i; 102 103 for(i=0; i<restore_count; i++) { 104 address sp = ((address)win->spbuf[i]) + STACK_BIAS; 105 address reg_win = (address)&win->wbuf[i]; 106 memcpy(sp,reg_win,sizeof(struct rwindow)); 107 } 108 } 109 110 char* os::non_memory_address_word() { 111 // Must never look like an address returned by reserve_memory, 112 // even in its subfields (as defined by the CPU immediate fields, 113 // if the CPU splits constants across multiple instructions). 114 // On SPARC, 0 != %hi(any real address), because there is no 115 // allocation in the first 1Kb of the virtual address space. 116 return (char*) 0; 117 } 118 119 // Validate a ucontext retrieved from walking a uc_link of a ucontext. 120 // There are issues with libthread giving out uc_links for different threads 121 // on the same uc_link chain and bad or circular links. 122 // 123 bool os::Solaris::valid_ucontext(Thread* thread, const ucontext_t* valid, const ucontext_t* suspect) { 124 if (valid >= suspect || 125 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags || 126 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp || 127 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) { 128 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");) 129 return false; 130 } 131 132 if (thread->is_Java_thread()) { 133 if (!valid_stack_address(thread, (address)suspect)) { 134 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");) 135 return false; 136 } 137 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 138 if (!valid_stack_address(thread, _sp) || 139 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) { 140 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");) 141 return false; 142 } 143 } 144 return true; 145 } 146 147 // We will only follow one level of uc_link since there are libthread 148 // issues with ucontext linking and it is better to be safe and just 149 // let caller retry later. 150 const ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread, 151 const ucontext_t *uc) { 152 153 const ucontext_t *retuc = NULL; 154 155 // Sometimes the topmost register windows are not properly flushed. 156 // i.e., if the kernel would have needed to take a page fault 157 if (uc != NULL && uc->uc_mcontext.gwins != NULL) { 158 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 159 } 160 161 if (uc != NULL) { 162 if (uc->uc_link == NULL) { 163 // cannot validate without uc_link so accept current ucontext 164 retuc = uc; 165 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { 166 // first ucontext is valid so try the next one 167 uc = uc->uc_link; 168 if (uc->uc_link == NULL) { 169 // cannot validate without uc_link so accept current ucontext 170 retuc = uc; 171 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { 172 // the ucontext one level down is also valid so return it 173 retuc = uc; 174 } 175 } 176 } 177 return retuc; 178 } 179 180 // Assumes ucontext is valid 181 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(const ucontext_t *uc) { 182 address pc = (address)uc->uc_mcontext.gregs[REG_PC]; 183 // set npc to zero to avoid using it for safepoint, good for profiling only 184 return ExtendedPC(pc); 185 } 186 187 void os::Solaris::ucontext_set_pc(ucontext_t* uc, address pc) { 188 uc->uc_mcontext.gregs [REG_PC] = (greg_t) pc; 189 uc->uc_mcontext.gregs [REG_nPC] = (greg_t) (pc + 4); 190 } 191 192 // Assumes ucontext is valid 193 intptr_t* os::Solaris::ucontext_get_sp(const ucontext_t *uc) { 194 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 195 } 196 197 // Solaris X86 only 198 intptr_t* os::Solaris::ucontext_get_fp(const ucontext_t *uc) { 199 ShouldNotReachHere(); 200 return NULL; 201 } 202 203 address os::Solaris::ucontext_get_pc(const ucontext_t *uc) { 204 return (address) uc->uc_mcontext.gregs[REG_PC]; 205 } 206 207 208 // For Forte Analyzer AsyncGetCallTrace profiling support - thread 209 // is currently interrupted by SIGPROF. 210 // 211 // ret_fp parameter is only used by Solaris X86. 212 // 213 // The difference between this and os::fetch_frame_from_context() is that 214 // here we try to skip nested signal frames. 215 // This method is also used for stack overflow signal handling. 216 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread, 217 const ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { 218 219 assert(thread != NULL, "just checking"); 220 assert(ret_sp != NULL, "just checking"); 221 assert(ret_fp == NULL, "just checking"); 222 223 const ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc); 224 225 return os::fetch_frame_from_context(luc, ret_sp, ret_fp); 226 } 227 228 229 // ret_fp parameter is only used by Solaris X86. 230 ExtendedPC os::fetch_frame_from_context(const void* ucVoid, 231 intptr_t** ret_sp, intptr_t** ret_fp) { 232 233 ExtendedPC epc; 234 const ucontext_t *uc = (const ucontext_t*)ucVoid; 235 236 if (uc != NULL) { 237 epc = os::Solaris::ucontext_get_ExtendedPC(uc); 238 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc); 239 } else { 240 // construct empty ExtendedPC for return value checking 241 epc = ExtendedPC(NULL); 242 if (ret_sp) *ret_sp = (intptr_t *)NULL; 243 } 244 245 return epc; 246 } 247 248 frame os::fetch_frame_from_context(const void* ucVoid) { 249 intptr_t* sp; 250 intptr_t* fp; 251 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); 252 return frame(sp, frame::unpatchable, epc.pc()); 253 } 254 255 frame os::fetch_frame_from_ucontext(Thread* thread, void* ucVoid) { 256 intptr_t* sp; 257 ExtendedPC epc = os::Solaris::fetch_frame_from_ucontext(thread, (ucontext_t*)ucVoid, &sp, NULL); 258 return frame(sp, frame::unpatchable, epc.pc()); 259 } 260 261 bool os::Solaris::get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr) { 262 address pc = (address) os::Solaris::ucontext_get_pc(uc); 263 if (Interpreter::contains(pc)) { 264 *fr = os::fetch_frame_from_ucontext(thread, uc); 265 if (!fr->is_first_java_frame()) { 266 assert(fr->safe_for_sender(thread), "Safety check"); 267 *fr = fr->java_sender(); 268 } 269 } else { 270 // more complex code with compiled code 271 assert(!Interpreter::contains(pc), "Interpreted methods should have been handled above"); 272 CodeBlob* cb = CodeCache::find_blob(pc); 273 if (cb == NULL || !cb->is_nmethod() || cb->is_frame_complete_at(pc)) { 274 // Not sure where the pc points to, fallback to default 275 // stack overflow handling 276 return false; 277 } else { 278 *fr = os::fetch_frame_from_ucontext(thread, uc); 279 *fr = frame(fr->sender_sp(), fr->sp()); 280 if (!fr->is_java_frame()) { 281 assert(fr->safe_for_sender(thread), "Safety check"); 282 *fr = fr->java_sender(); 283 } 284 } 285 } 286 assert(fr->is_java_frame(), "Safety check"); 287 return true; 288 } 289 290 frame os::get_sender_for_C_frame(frame* fr) { 291 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc()); 292 } 293 294 // Returns an estimate of the current stack pointer. Result must be guaranteed to 295 // point into the calling threads stack, and be no lower than the current stack 296 // pointer. 297 address os::current_stack_pointer() { 298 volatile int dummy; 299 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 300 return sp; 301 } 302 303 frame os::current_frame() { 304 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); 305 frame myframe(sp, frame::unpatchable, 306 CAST_FROM_FN_PTR(address, os::current_frame)); 307 if (os::is_first_C_frame(&myframe)) { 308 // stack is not walkable 309 return frame(NULL, NULL, false); 310 } else { 311 return os::get_sender_for_C_frame(&myframe); 312 } 313 } 314 315 bool os::is_allocatable(size_t bytes) { 316 #ifdef _LP64 317 return true; 318 #else 319 return (bytes <= (size_t)3835*M); 320 #endif 321 } 322 323 extern "C" JNIEXPORT int 324 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, 325 int abort_if_unrecognized) { 326 ucontext_t* uc = (ucontext_t*) ucVoid; 327 328 Thread* t = Thread::current_or_null_safe(); 329 330 // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away 331 // (no destructors can be run) 332 os::WatcherThreadCrashProtection::check_crash_protection(sig, t); 333 334 SignalHandlerMark shm(t); 335 336 if(sig == SIGPIPE || sig == SIGXFSZ) { 337 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 338 return true; 339 } else { 340 // Ignoring SIGPIPE/SIGXFSZ - see bugs 4229104 or 6499219 341 return true; 342 } 343 } 344 345 JavaThread* thread = NULL; 346 VMThread* vmthread = NULL; 347 if (os::Solaris::signal_handlers_are_installed) { 348 if (t != NULL ){ 349 if(t->is_Java_thread()) { 350 thread = (JavaThread*)t; 351 } 352 else if(t->is_VM_thread()){ 353 vmthread = (VMThread *)t; 354 } 355 } 356 } 357 358 if (sig == os::Solaris::SIGasync()) { 359 if (thread || vmthread) { 360 OSThread::SR_handler(t, uc); 361 return true; 362 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { 363 return true; 364 } else { 365 // If os::Solaris::SIGasync not chained, and this is a non-vm and 366 // non-java thread 367 return true; 368 } 369 } 370 371 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { 372 // can't decode this kind of signal 373 info = NULL; 374 } else { 375 assert(sig == info->si_signo, "bad siginfo"); 376 } 377 378 // decide if this trap can be handled by a stub 379 address stub = NULL; 380 381 address pc = NULL; 382 address npc = NULL; 383 384 //%note os_trap_1 385 if (info != NULL && uc != NULL && thread != NULL) { 386 // factor me: getPCfromContext 387 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 388 npc = (address) uc->uc_mcontext.gregs[REG_nPC]; 389 390 // SafeFetch() support 391 if (StubRoutines::is_safefetch_fault(pc)) { 392 os::Solaris::ucontext_set_pc(uc, StubRoutines::continuation_for_safefetch_fault(pc)); 393 return 1; 394 } 395 396 // Handle ALL stack overflow variations here 397 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) { 398 address addr = (address) info->si_addr; 399 if (thread->in_stack_yellow_reserved_zone(addr)) { 400 // Sometimes the register windows are not properly flushed. 401 if(uc->uc_mcontext.gwins != NULL) { 402 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 403 } 404 if (thread->thread_state() == _thread_in_Java) { 405 if (thread->in_stack_reserved_zone(addr)) { 406 frame fr; 407 if (os::Solaris::get_frame_at_stack_banging_point(thread, uc, &fr)) { 408 assert(fr.is_java_frame(), "Must be a Java frame"); 409 frame activation = SharedRuntime::look_for_reserved_stack_annotated_method(thread, fr); 410 if (activation.sp() != NULL) { 411 thread->disable_stack_reserved_zone(); 412 RegisterMap map(thread); 413 int frame_size = activation.frame_size(&map); 414 thread->set_reserved_stack_activation((address)(((address)activation.sp()) - STACK_BIAS)); 415 return true; 416 } 417 } 418 } 419 // Throw a stack overflow exception. Guard pages will be reenabled 420 // while unwinding the stack. 421 thread->disable_stack_yellow_reserved_zone(); 422 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); 423 } else { 424 // Thread was in the vm or native code. Return and try to finish. 425 thread->disable_stack_yellow_reserved_zone(); 426 return true; 427 } 428 } else if (thread->in_stack_red_zone(addr)) { 429 // Fatal red zone violation. Disable the guard pages and fall through 430 // to handle_unexpected_exception way down below. 431 thread->disable_stack_red_zone(); 432 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); 433 // Sometimes the register windows are not properly flushed. 434 if(uc->uc_mcontext.gwins != NULL) { 435 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 436 } 437 } 438 } 439 440 441 if (thread->thread_state() == _thread_in_vm) { 442 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) { 443 stub = SharedRuntime::handle_unsafe_access(thread, npc); 444 } 445 } 446 447 else if (thread->thread_state() == _thread_in_Java) { 448 // Java thread running in Java code => find exception handler if any 449 // a fault inside compiled code, the interpreter, or a stub 450 451 // Support Safepoint Polling 452 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) { 453 stub = SharedRuntime::get_poll_stub(pc); 454 } 455 456 // Not needed on x86 solaris because verify_oops doesn't generate 457 // SEGV/BUS like sparc does. 458 if ( (sig == SIGSEGV || sig == SIGBUS) 459 && pc >= MacroAssembler::_verify_oop_implicit_branch[0] 460 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) { 461 stub = MacroAssembler::_verify_oop_implicit_branch[2]; 462 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr); 463 } 464 465 // This is not factored because on x86 solaris the patching for 466 // zombies does not generate a SEGV. 467 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) { 468 // zombie method (ld [%g0],%o7 instruction) 469 stub = SharedRuntime::get_handle_wrong_method_stub(); 470 471 // At the stub it needs to look like a call from the caller of this 472 // method (not a call from the segv site). 473 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 474 } 475 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { 476 // BugId 4454115: A read from a MappedByteBuffer can fault 477 // here if the underlying file has been truncated. 478 // Do not crash the VM in such a case. 479 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 480 CompiledMethod* nm = cb->as_compiled_method_or_null(); 481 if (nm != NULL && nm->has_unsafe_access()) { 482 stub = SharedRuntime::handle_unsafe_access(thread, npc); 483 } 484 } 485 486 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) { 487 // integer divide by zero 488 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 489 } 490 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { 491 // floating-point divide by zero 492 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 493 } 494 #ifdef COMPILER2 495 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) { 496 #ifdef ASSERT 497 #ifdef TIERED 498 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 499 assert(cb->is_compiled_by_c2(), "Wrong compiler"); 500 #endif // TIERED 501 #endif // ASSERT 502 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken. 503 stub = SharedRuntime::get_ic_miss_stub(); 504 // At the stub it needs to look like a call from the caller of this 505 // method (not a call from the segv site). 506 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 507 } 508 #endif // COMPILER2 509 510 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { 511 // Determination of interpreter/vtable stub/compiled code null exception 512 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 513 } 514 } 515 516 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in 517 // and the heap gets shrunk before the field access. 518 if ((sig == SIGSEGV) || (sig == SIGBUS)) { 519 address addr = JNI_FastGetField::find_slowcase_pc(pc); 520 if (addr != (address)-1) { 521 stub = addr; 522 } 523 } 524 525 // Check to see if we caught the safepoint code in the 526 // process of write protecting the memory serialization page. 527 // It write enables the page immediately after protecting it 528 // so just return. 529 if ((sig == SIGSEGV) && 530 os::is_memory_serialize_page(thread, (address)info->si_addr)) { 531 // Block current thread until the memory serialize page permission restored. 532 os::block_on_serialize_page_trap(); 533 return true; 534 } 535 } 536 537 if (stub != NULL) { 538 // save all thread context in case we need to restore it 539 540 thread->set_saved_exception_pc(pc); 541 thread->set_saved_exception_npc(npc); 542 543 // simulate a branch to the stub (a "call" in the safepoint stub case) 544 // factor me: setPC 545 os::Solaris::ucontext_set_pc(uc, stub); 546 547 #ifndef PRODUCT 548 if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__); 549 #endif /* PRODUCT */ 550 551 return true; 552 } 553 554 // signal-chaining 555 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 556 return true; 557 } 558 559 if (!abort_if_unrecognized) { 560 // caller wants another chance, so give it to him 561 return false; 562 } 563 564 if (!os::Solaris::libjsig_is_loaded) { 565 struct sigaction oldAct; 566 sigaction(sig, (struct sigaction *)0, &oldAct); 567 if (oldAct.sa_sigaction != signalHandler) { 568 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 569 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 570 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand); 571 } 572 } 573 574 if (pc == NULL && uc != NULL) { 575 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 576 } 577 578 // Sometimes the register windows are not properly flushed. 579 if(uc->uc_mcontext.gwins != NULL) { 580 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 581 } 582 583 // unmask current signal 584 sigset_t newset; 585 sigemptyset(&newset); 586 sigaddset(&newset, sig); 587 sigprocmask(SIG_UNBLOCK, &newset, NULL); 588 589 // Determine which sort of error to throw. Out of swap may signal 590 // on the thread stack, which could get a mapping error when touched. 591 address addr = (address) info->si_addr; 592 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) { 593 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack."); 594 } 595 596 VMError::report_and_die(t, sig, pc, info, ucVoid); 597 598 ShouldNotReachHere(); 599 return false; 600 } 601 602 void os::print_context(outputStream *st, const void *context) { 603 if (context == NULL) return; 604 605 const ucontext_t *uc = (const ucontext_t*)context; 606 st->print_cr("Registers:"); 607 608 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT 609 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT, 610 uc->uc_mcontext.gregs[REG_G1], 611 uc->uc_mcontext.gregs[REG_G2], 612 uc->uc_mcontext.gregs[REG_G3], 613 uc->uc_mcontext.gregs[REG_G4]); 614 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT 615 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT, 616 uc->uc_mcontext.gregs[REG_G5], 617 uc->uc_mcontext.gregs[REG_G6], 618 uc->uc_mcontext.gregs[REG_G7], 619 uc->uc_mcontext.gregs[REG_Y]); 620 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT 621 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT, 622 uc->uc_mcontext.gregs[REG_O0], 623 uc->uc_mcontext.gregs[REG_O1], 624 uc->uc_mcontext.gregs[REG_O2], 625 uc->uc_mcontext.gregs[REG_O3]); 626 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT 627 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT, 628 uc->uc_mcontext.gregs[REG_O4], 629 uc->uc_mcontext.gregs[REG_O5], 630 uc->uc_mcontext.gregs[REG_O6], 631 uc->uc_mcontext.gregs[REG_O7]); 632 633 634 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 635 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT 636 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT, 637 sp[L0->sp_offset_in_saved_window()], 638 sp[L1->sp_offset_in_saved_window()], 639 sp[L2->sp_offset_in_saved_window()], 640 sp[L3->sp_offset_in_saved_window()]); 641 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT 642 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT, 643 sp[L4->sp_offset_in_saved_window()], 644 sp[L5->sp_offset_in_saved_window()], 645 sp[L6->sp_offset_in_saved_window()], 646 sp[L7->sp_offset_in_saved_window()]); 647 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT 648 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT, 649 sp[I0->sp_offset_in_saved_window()], 650 sp[I1->sp_offset_in_saved_window()], 651 sp[I2->sp_offset_in_saved_window()], 652 sp[I3->sp_offset_in_saved_window()]); 653 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT 654 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT, 655 sp[I4->sp_offset_in_saved_window()], 656 sp[I5->sp_offset_in_saved_window()], 657 sp[I6->sp_offset_in_saved_window()], 658 sp[I7->sp_offset_in_saved_window()]); 659 660 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT, 661 uc->uc_mcontext.gregs[REG_PC], 662 uc->uc_mcontext.gregs[REG_nPC]); 663 st->cr(); 664 st->cr(); 665 666 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); 667 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); 668 st->cr(); 669 670 // Note: it may be unsafe to inspect memory near pc. For example, pc may 671 // point to garbage if entry point in an nmethod is corrupted. Leave 672 // this at the end, and hope for the best. 673 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); 674 address pc = epc.pc(); 675 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); 676 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); 677 } 678 679 void os::print_register_info(outputStream *st, const void *context) { 680 if (context == NULL) return; 681 682 const ucontext_t *uc = (const ucontext_t*)context; 683 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 684 685 st->print_cr("Register to memory mapping:"); 686 st->cr(); 687 688 // this is only for the "general purpose" registers 689 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]); 690 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]); 691 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]); 692 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]); 693 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]); 694 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]); 695 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]); 696 st->cr(); 697 698 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]); 699 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]); 700 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]); 701 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]); 702 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]); 703 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]); 704 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]); 705 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]); 706 st->cr(); 707 708 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]); 709 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]); 710 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]); 711 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]); 712 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]); 713 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]); 714 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]); 715 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]); 716 st->cr(); 717 718 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]); 719 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]); 720 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]); 721 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]); 722 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]); 723 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]); 724 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]); 725 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]); 726 st->cr(); 727 } 728 729 void os::Solaris::init_thread_fpu_state(void) { 730 // Nothing needed on Sparc. 731 } 732 733 #if !defined(COMPILER2) && !defined(_LP64) 734 735 // These routines are the initial value of atomic_xchg_entry(), 736 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry() 737 // until initialization is complete. 738 // TODO - remove when the VM drops support for V8. 739 740 typedef jint xchg_func_t (jint, volatile jint*); 741 typedef jint cmpxchg_func_t (jint, volatile jint*, jint); 742 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong); 743 typedef jint add_func_t (jint, volatile jint*); 744 745 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { 746 // try to use the stub: 747 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); 748 749 if (func != NULL) { 750 os::atomic_xchg_func = func; 751 return (*func)(exchange_value, dest); 752 } 753 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 754 755 jint old_value = *dest; 756 *dest = exchange_value; 757 return old_value; 758 } 759 760 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { 761 // try to use the stub: 762 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); 763 764 if (func != NULL) { 765 os::atomic_cmpxchg_func = func; 766 return (*func)(exchange_value, dest, compare_value); 767 } 768 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 769 770 jint old_value = *dest; 771 if (old_value == compare_value) 772 *dest = exchange_value; 773 return old_value; 774 } 775 776 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { 777 // try to use the stub: 778 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); 779 780 if (func != NULL) { 781 os::atomic_cmpxchg_long_func = func; 782 return (*func)(exchange_value, dest, compare_value); 783 } 784 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 785 786 jlong old_value = *dest; 787 if (old_value == compare_value) 788 *dest = exchange_value; 789 return old_value; 790 } 791 792 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { 793 // try to use the stub: 794 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); 795 796 if (func != NULL) { 797 os::atomic_add_func = func; 798 return (*func)(add_value, dest); 799 } 800 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 801 802 return (*dest) += add_value; 803 } 804 805 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; 806 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; 807 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; 808 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; 809 810 #endif // !_LP64 && !COMPILER2 811 812 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE) 813 // See file build/solaris/makefiles/$compiler.make 814 // For compiler1 the architecture is v8 and frps isn't present in v8 815 extern "C" void _mark_fpu_nosave() { 816 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :); 817 } 818 #endif //defined(__sparc) && defined(COMPILER2) 819 820 #ifndef PRODUCT 821 void os::verify_stack_alignment() { 822 } 823 #endif 824 825 int os::extra_bang_size_in_bytes() { 826 // SPARC does not require an additional stack bang. 827 return 0; 828 }