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 "nativeInst_sparc.hpp" 38 #include "os_share_solaris.hpp" 39 #include "prims/jniFastGetField.hpp" 40 #include "prims/jvm.h" 41 #include "prims/jvm_misc.hpp" 42 #include "runtime/arguments.hpp" 43 #include "runtime/extendedPC.hpp" 44 #include "runtime/frame.inline.hpp" 45 #include "runtime/interfaceSupport.hpp" 46 #include "runtime/java.hpp" 47 #include "runtime/javaCalls.hpp" 48 #include "runtime/mutexLocker.hpp" 49 #include "runtime/osThread.hpp" 50 #include "runtime/sharedRuntime.hpp" 51 #include "runtime/stubRoutines.hpp" 52 #include "runtime/thread.inline.hpp" 53 #include "runtime/timer.hpp" 54 #include "utilities/events.hpp" 55 #include "utilities/vmError.hpp" 56 57 # include <signal.h> // needed first to avoid name collision for "std" with SC 5.0 58 59 // put OS-includes here 60 # include <sys/types.h> 61 # include <sys/mman.h> 62 # include <pthread.h> 63 # include <errno.h> 64 # include <dlfcn.h> 65 # include <stdio.h> 66 # include <unistd.h> 67 # include <sys/resource.h> 68 # include <thread.h> 69 # include <sys/stat.h> 70 # include <sys/time.h> 71 # include <sys/filio.h> 72 # include <sys/utsname.h> 73 # include <sys/systeminfo.h> 74 # include <sys/socket.h> 75 # include <sys/lwp.h> 76 # include <poll.h> 77 # include <sys/lwp.h> 78 79 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 80 # include <sys/procfs.h> // see comment in <sys/procfs.h> 81 82 #define MAX_PATH (2 * K) 83 84 // Minimum stack size for the VM. It's easier to document a constant 85 // but it's different for x86 and sparc because the page sizes are different. 86 #ifdef _LP64 87 size_t os::Solaris::min_stack_allowed = 128*K; 88 #else 89 size_t os::Solaris::min_stack_allowed = 96*K; 90 #endif 91 92 int os::Solaris::max_register_window_saves_before_flushing() { 93 // We should detect this at run time. For now, filling 94 // in with a constant. 95 return 8; 96 } 97 98 static void handle_unflushed_register_windows(gwindows_t *win) { 99 int restore_count = win->wbcnt; 100 int i; 101 102 for(i=0; i<restore_count; i++) { 103 address sp = ((address)win->spbuf[i]) + STACK_BIAS; 104 address reg_win = (address)&win->wbuf[i]; 105 memcpy(sp,reg_win,sizeof(struct rwindow)); 106 } 107 } 108 109 char* os::non_memory_address_word() { 110 // Must never look like an address returned by reserve_memory, 111 // even in its subfields (as defined by the CPU immediate fields, 112 // if the CPU splits constants across multiple instructions). 113 // On SPARC, 0 != %hi(any real address), because there is no 114 // allocation in the first 1Kb of the virtual address space. 115 return (char*) 0; 116 } 117 118 // Validate a ucontext retrieved from walking a uc_link of a ucontext. 119 // There are issues with libthread giving out uc_links for different threads 120 // on the same uc_link chain and bad or circular links. 121 // 122 bool os::Solaris::valid_ucontext(Thread* thread, const ucontext_t* valid, const ucontext_t* suspect) { 123 if (valid >= suspect || 124 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags || 125 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp || 126 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) { 127 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");) 128 return false; 129 } 130 131 if (thread->is_Java_thread()) { 132 if (!valid_stack_address(thread, (address)suspect)) { 133 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");) 134 return false; 135 } 136 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 137 if (!valid_stack_address(thread, _sp) || 138 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) { 139 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");) 140 return false; 141 } 142 } 143 return true; 144 } 145 146 // We will only follow one level of uc_link since there are libthread 147 // issues with ucontext linking and it is better to be safe and just 148 // let caller retry later. 149 const ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread, 150 const ucontext_t *uc) { 151 152 const ucontext_t *retuc = NULL; 153 154 // Sometimes the topmost register windows are not properly flushed. 155 // i.e., if the kernel would have needed to take a page fault 156 if (uc != NULL && uc->uc_mcontext.gwins != NULL) { 157 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 158 } 159 160 if (uc != NULL) { 161 if (uc->uc_link == NULL) { 162 // cannot validate without uc_link so accept current ucontext 163 retuc = uc; 164 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { 165 // first ucontext is valid so try the next one 166 uc = uc->uc_link; 167 if (uc->uc_link == NULL) { 168 // cannot validate without uc_link so accept current ucontext 169 retuc = uc; 170 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { 171 // the ucontext one level down is also valid so return it 172 retuc = uc; 173 } 174 } 175 } 176 return retuc; 177 } 178 179 // Assumes ucontext is valid 180 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(const ucontext_t *uc) { 181 address pc = (address)uc->uc_mcontext.gregs[REG_PC]; 182 // set npc to zero to avoid using it for safepoint, good for profiling only 183 return ExtendedPC(pc); 184 } 185 186 void os::Solaris::ucontext_set_pc(ucontext_t* uc, address pc) { 187 uc->uc_mcontext.gregs [REG_PC] = (greg_t) pc; 188 uc->uc_mcontext.gregs [REG_nPC] = (greg_t) (pc + 4); 189 } 190 191 // Assumes ucontext is valid 192 intptr_t* os::Solaris::ucontext_get_sp(const ucontext_t *uc) { 193 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 194 } 195 196 // Solaris X86 only 197 intptr_t* os::Solaris::ucontext_get_fp(const ucontext_t *uc) { 198 ShouldNotReachHere(); 199 return NULL; 200 } 201 202 address os::Solaris::ucontext_get_pc(const ucontext_t *uc) { 203 return (address) uc->uc_mcontext.gregs[REG_PC]; 204 } 205 206 207 // For Forte Analyzer AsyncGetCallTrace profiling support - thread 208 // is currently interrupted by SIGPROF. 209 // 210 // ret_fp parameter is only used by Solaris X86. 211 // 212 // The difference between this and os::fetch_frame_from_context() is that 213 // here we try to skip nested signal frames. 214 // This method is also used for stack overflow signal handling. 215 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread, 216 const ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { 217 218 assert(thread != NULL, "just checking"); 219 assert(ret_sp != NULL, "just checking"); 220 assert(ret_fp == NULL, "just checking"); 221 222 const ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc); 223 224 return os::fetch_frame_from_context(luc, ret_sp, ret_fp); 225 } 226 227 228 // ret_fp parameter is only used by Solaris X86. 229 ExtendedPC os::fetch_frame_from_context(const void* ucVoid, 230 intptr_t** ret_sp, intptr_t** ret_fp) { 231 232 ExtendedPC epc; 233 const ucontext_t *uc = (const ucontext_t*)ucVoid; 234 235 if (uc != NULL) { 236 epc = os::Solaris::ucontext_get_ExtendedPC(uc); 237 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc); 238 } else { 239 // construct empty ExtendedPC for return value checking 240 epc = ExtendedPC(NULL); 241 if (ret_sp) *ret_sp = (intptr_t *)NULL; 242 } 243 244 return epc; 245 } 246 247 frame os::fetch_frame_from_context(const void* ucVoid) { 248 intptr_t* sp; 249 intptr_t* fp; 250 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); 251 return frame(sp, frame::unpatchable, epc.pc()); 252 } 253 254 frame os::fetch_frame_from_ucontext(Thread* thread, void* ucVoid) { 255 intptr_t* sp; 256 ExtendedPC epc = os::Solaris::fetch_frame_from_ucontext(thread, (ucontext_t*)ucVoid, &sp, NULL); 257 return frame(sp, frame::unpatchable, epc.pc()); 258 } 259 260 bool os::Solaris::get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr) { 261 address pc = (address) os::Solaris::ucontext_get_pc(uc); 262 if (Interpreter::contains(pc)) { 263 *fr = os::fetch_frame_from_ucontext(thread, uc); 264 if (!fr->is_first_java_frame()) { 265 assert(fr->safe_for_sender(thread), "Safety check"); 266 *fr = fr->java_sender(); 267 } 268 } else { 269 // more complex code with compiled code 270 assert(!Interpreter::contains(pc), "Interpreted methods should have been handled above"); 271 CodeBlob* cb = CodeCache::find_blob(pc); 272 if (cb == NULL || !cb->is_nmethod() || cb->is_frame_complete_at(pc)) { 273 // Not sure where the pc points to, fallback to default 274 // stack overflow handling 275 return false; 276 } else { 277 // Returned frame will be the caller of the method that faults on the stack bang. 278 // Register window not yet rotated (happens at SAVE after stack bang), so there is no new 279 // frame to go with the faulting PC. Using caller SP that is still in SP, and caller PC 280 // that was written to O7 at call. 281 intptr_t* sp = os::Solaris::ucontext_get_sp(uc); 282 address pc = (address)uc->uc_mcontext.gregs[REG_O7]; 283 *fr = frame(sp, frame::unpatchable, pc); 284 285 if (!fr->is_java_frame()) { 286 assert(fr->safe_for_sender(thread), "Safety check"); 287 *fr = fr->java_sender(); 288 } 289 } 290 } 291 assert(fr->is_java_frame(), "Safety check"); 292 return true; 293 } 294 295 frame os::get_sender_for_C_frame(frame* fr) { 296 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc()); 297 } 298 299 // Returns an estimate of the current stack pointer. Result must be guaranteed to 300 // point into the calling threads stack, and be no lower than the current stack 301 // pointer. 302 address os::current_stack_pointer() { 303 volatile int dummy; 304 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 305 return sp; 306 } 307 308 frame os::current_frame() { 309 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); 310 frame myframe(sp, frame::unpatchable, 311 CAST_FROM_FN_PTR(address, os::current_frame)); 312 if (os::is_first_C_frame(&myframe)) { 313 // stack is not walkable 314 return frame(NULL, NULL, false); 315 } else { 316 return os::get_sender_for_C_frame(&myframe); 317 } 318 } 319 320 bool os::is_allocatable(size_t bytes) { 321 #ifdef _LP64 322 return true; 323 #else 324 return (bytes <= (size_t)3835*M); 325 #endif 326 } 327 328 extern "C" JNIEXPORT int 329 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, 330 int abort_if_unrecognized) { 331 ucontext_t* uc = (ucontext_t*) ucVoid; 332 333 Thread* t = Thread::current_or_null_safe(); 334 335 // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away 336 // (no destructors can be run) 337 os::WatcherThreadCrashProtection::check_crash_protection(sig, t); 338 339 SignalHandlerMark shm(t); 340 341 if(sig == SIGPIPE || sig == SIGXFSZ) { 342 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 343 return true; 344 } else { 345 // Ignoring SIGPIPE/SIGXFSZ - see bugs 4229104 or 6499219 346 return true; 347 } 348 } 349 350 JavaThread* thread = NULL; 351 VMThread* vmthread = NULL; 352 if (os::Solaris::signal_handlers_are_installed) { 353 if (t != NULL ){ 354 if(t->is_Java_thread()) { 355 thread = (JavaThread*)t; 356 } 357 else if(t->is_VM_thread()){ 358 vmthread = (VMThread *)t; 359 } 360 } 361 } 362 363 if (sig == os::Solaris::SIGasync()) { 364 if (thread || vmthread) { 365 OSThread::SR_handler(t, uc); 366 return true; 367 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { 368 return true; 369 } else { 370 // If os::Solaris::SIGasync not chained, and this is a non-vm and 371 // non-java thread 372 return true; 373 } 374 } 375 376 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { 377 // can't decode this kind of signal 378 info = NULL; 379 } else { 380 assert(sig == info->si_signo, "bad siginfo"); 381 } 382 383 // decide if this trap can be handled by a stub 384 address stub = NULL; 385 386 address pc = NULL; 387 address npc = NULL; 388 389 //%note os_trap_1 390 if (info != NULL && uc != NULL && thread != NULL) { 391 // factor me: getPCfromContext 392 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 393 npc = (address) uc->uc_mcontext.gregs[REG_nPC]; 394 395 // SafeFetch() support 396 if (StubRoutines::is_safefetch_fault(pc)) { 397 os::Solaris::ucontext_set_pc(uc, StubRoutines::continuation_for_safefetch_fault(pc)); 398 return 1; 399 } 400 401 // Handle ALL stack overflow variations here 402 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) { 403 address addr = (address) info->si_addr; 404 if (thread->in_stack_yellow_reserved_zone(addr)) { 405 // Sometimes the register windows are not properly flushed. 406 if(uc->uc_mcontext.gwins != NULL) { 407 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 408 } 409 if (thread->thread_state() == _thread_in_Java) { 410 if (thread->in_stack_reserved_zone(addr)) { 411 frame fr; 412 if (os::Solaris::get_frame_at_stack_banging_point(thread, uc, &fr)) { 413 assert(fr.is_java_frame(), "Must be a Java frame"); 414 frame activation = SharedRuntime::look_for_reserved_stack_annotated_method(thread, fr); 415 if (activation.sp() != NULL) { 416 thread->disable_stack_reserved_zone(); 417 RegisterMap map(thread); 418 int frame_size = activation.frame_size(&map); 419 thread->set_reserved_stack_activation((address)(((address)activation.sp()) - STACK_BIAS)); 420 return true; 421 } 422 } 423 } 424 // Throw a stack overflow exception. Guard pages will be reenabled 425 // while unwinding the stack. 426 thread->disable_stack_yellow_reserved_zone(); 427 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); 428 } else { 429 // Thread was in the vm or native code. Return and try to finish. 430 thread->disable_stack_yellow_reserved_zone(); 431 return true; 432 } 433 } else if (thread->in_stack_red_zone(addr)) { 434 // Fatal red zone violation. Disable the guard pages and fall through 435 // to handle_unexpected_exception way down below. 436 thread->disable_stack_red_zone(); 437 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); 438 // Sometimes the register windows are not properly flushed. 439 if(uc->uc_mcontext.gwins != NULL) { 440 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 441 } 442 } 443 } 444 445 446 if (thread->thread_state() == _thread_in_vm) { 447 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) { 448 stub = SharedRuntime::handle_unsafe_access(thread, npc); 449 } 450 } 451 452 else if (thread->thread_state() == _thread_in_Java) { 453 // Java thread running in Java code => find exception handler if any 454 // a fault inside compiled code, the interpreter, or a stub 455 456 // Support Safepoint Polling 457 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) { 458 stub = SharedRuntime::get_poll_stub(pc); 459 } 460 461 // Not needed on x86 solaris because verify_oops doesn't generate 462 // SEGV/BUS like sparc does. 463 if ( (sig == SIGSEGV || sig == SIGBUS) 464 && pc >= MacroAssembler::_verify_oop_implicit_branch[0] 465 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) { 466 stub = MacroAssembler::_verify_oop_implicit_branch[2]; 467 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr); 468 } 469 470 // This is not factored because on x86 solaris the patching for 471 // zombies does not generate a SEGV. 472 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) { 473 // zombie method (ld [%g0],%o7 instruction) 474 stub = SharedRuntime::get_handle_wrong_method_stub(); 475 476 // At the stub it needs to look like a call from the caller of this 477 // method (not a call from the segv site). 478 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 479 } 480 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { 481 // BugId 4454115: A read from a MappedByteBuffer can fault 482 // here if the underlying file has been truncated. 483 // Do not crash the VM in such a case. 484 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 485 CompiledMethod* nm = cb->as_compiled_method_or_null(); 486 if (nm != NULL && nm->has_unsafe_access()) { 487 stub = SharedRuntime::handle_unsafe_access(thread, npc); 488 } 489 } 490 491 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) { 492 // integer divide by zero 493 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 494 } 495 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { 496 // floating-point divide by zero 497 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 498 } 499 #ifdef COMPILER2 500 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) { 501 #ifdef ASSERT 502 #ifdef TIERED 503 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 504 assert(cb->is_compiled_by_c2(), "Wrong compiler"); 505 #endif // TIERED 506 #endif // ASSERT 507 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken. 508 stub = SharedRuntime::get_ic_miss_stub(); 509 // At the stub it needs to look like a call from the caller of this 510 // method (not a call from the segv site). 511 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 512 } 513 #endif // COMPILER2 514 515 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { 516 // Determination of interpreter/vtable stub/compiled code null exception 517 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 518 } 519 } 520 521 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in 522 // and the heap gets shrunk before the field access. 523 if ((sig == SIGSEGV) || (sig == SIGBUS)) { 524 address addr = JNI_FastGetField::find_slowcase_pc(pc); 525 if (addr != (address)-1) { 526 stub = addr; 527 } 528 } 529 530 // Check to see if we caught the safepoint code in the 531 // process of write protecting the memory serialization page. 532 // It write enables the page immediately after protecting it 533 // so just return. 534 if ((sig == SIGSEGV) && 535 os::is_memory_serialize_page(thread, (address)info->si_addr)) { 536 // Block current thread until the memory serialize page permission restored. 537 os::block_on_serialize_page_trap(); 538 return true; 539 } 540 } 541 542 if (stub != NULL) { 543 // save all thread context in case we need to restore it 544 545 thread->set_saved_exception_pc(pc); 546 thread->set_saved_exception_npc(npc); 547 548 // simulate a branch to the stub (a "call" in the safepoint stub case) 549 // factor me: setPC 550 os::Solaris::ucontext_set_pc(uc, stub); 551 552 return true; 553 } 554 555 // signal-chaining 556 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 557 return true; 558 } 559 560 if (!abort_if_unrecognized) { 561 // caller wants another chance, so give it to him 562 return false; 563 } 564 565 if (!os::Solaris::libjsig_is_loaded) { 566 struct sigaction oldAct; 567 sigaction(sig, (struct sigaction *)0, &oldAct); 568 if (oldAct.sa_sigaction != signalHandler) { 569 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 570 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 571 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand); 572 } 573 } 574 575 if (pc == NULL && uc != NULL) { 576 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 577 } 578 579 // Sometimes the register windows are not properly flushed. 580 if(uc->uc_mcontext.gwins != NULL) { 581 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 582 } 583 584 // unmask current signal 585 sigset_t newset; 586 sigemptyset(&newset); 587 sigaddset(&newset, sig); 588 sigprocmask(SIG_UNBLOCK, &newset, NULL); 589 590 // Determine which sort of error to throw. Out of swap may signal 591 // on the thread stack, which could get a mapping error when touched. 592 address addr = (address) info->si_addr; 593 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) { 594 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack."); 595 } 596 597 VMError::report_and_die(t, sig, pc, info, ucVoid); 598 599 ShouldNotReachHere(); 600 return false; 601 } 602 603 void os::print_context(outputStream *st, const void *context) { 604 if (context == NULL) return; 605 606 const ucontext_t *uc = (const ucontext_t*)context; 607 st->print_cr("Registers:"); 608 609 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT 610 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT, 611 uc->uc_mcontext.gregs[REG_G1], 612 uc->uc_mcontext.gregs[REG_G2], 613 uc->uc_mcontext.gregs[REG_G3], 614 uc->uc_mcontext.gregs[REG_G4]); 615 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT 616 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT, 617 uc->uc_mcontext.gregs[REG_G5], 618 uc->uc_mcontext.gregs[REG_G6], 619 uc->uc_mcontext.gregs[REG_G7], 620 uc->uc_mcontext.gregs[REG_Y]); 621 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT 622 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT, 623 uc->uc_mcontext.gregs[REG_O0], 624 uc->uc_mcontext.gregs[REG_O1], 625 uc->uc_mcontext.gregs[REG_O2], 626 uc->uc_mcontext.gregs[REG_O3]); 627 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT 628 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT, 629 uc->uc_mcontext.gregs[REG_O4], 630 uc->uc_mcontext.gregs[REG_O5], 631 uc->uc_mcontext.gregs[REG_O6], 632 uc->uc_mcontext.gregs[REG_O7]); 633 634 635 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 636 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT 637 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT, 638 sp[L0->sp_offset_in_saved_window()], 639 sp[L1->sp_offset_in_saved_window()], 640 sp[L2->sp_offset_in_saved_window()], 641 sp[L3->sp_offset_in_saved_window()]); 642 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT 643 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT, 644 sp[L4->sp_offset_in_saved_window()], 645 sp[L5->sp_offset_in_saved_window()], 646 sp[L6->sp_offset_in_saved_window()], 647 sp[L7->sp_offset_in_saved_window()]); 648 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT 649 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT, 650 sp[I0->sp_offset_in_saved_window()], 651 sp[I1->sp_offset_in_saved_window()], 652 sp[I2->sp_offset_in_saved_window()], 653 sp[I3->sp_offset_in_saved_window()]); 654 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT 655 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT, 656 sp[I4->sp_offset_in_saved_window()], 657 sp[I5->sp_offset_in_saved_window()], 658 sp[I6->sp_offset_in_saved_window()], 659 sp[I7->sp_offset_in_saved_window()]); 660 661 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT, 662 uc->uc_mcontext.gregs[REG_PC], 663 uc->uc_mcontext.gregs[REG_nPC]); 664 st->cr(); 665 st->cr(); 666 667 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); 668 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); 669 st->cr(); 670 671 // Note: it may be unsafe to inspect memory near pc. For example, pc may 672 // point to garbage if entry point in an nmethod is corrupted. Leave 673 // this at the end, and hope for the best. 674 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); 675 address pc = epc.pc(); 676 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); 677 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); 678 } 679 680 void os::print_register_info(outputStream *st, const void *context) { 681 if (context == NULL) return; 682 683 const ucontext_t *uc = (const ucontext_t*)context; 684 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 685 686 st->print_cr("Register to memory mapping:"); 687 st->cr(); 688 689 // this is only for the "general purpose" registers 690 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]); 691 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]); 692 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]); 693 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]); 694 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]); 695 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]); 696 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]); 697 st->cr(); 698 699 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]); 700 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]); 701 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]); 702 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]); 703 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]); 704 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]); 705 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]); 706 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]); 707 st->cr(); 708 709 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]); 710 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]); 711 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]); 712 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]); 713 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]); 714 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]); 715 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]); 716 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]); 717 st->cr(); 718 719 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]); 720 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]); 721 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]); 722 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]); 723 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]); 724 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]); 725 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]); 726 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]); 727 st->cr(); 728 } 729 730 void os::Solaris::init_thread_fpu_state(void) { 731 // Nothing needed on Sparc. 732 } 733 734 #if !defined(COMPILER2) && !defined(_LP64) 735 736 // These routines are the initial value of atomic_xchg_entry(), 737 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry() 738 // until initialization is complete. 739 // TODO - remove when the VM drops support for V8. 740 741 typedef jint xchg_func_t (jint, volatile jint*); 742 typedef jint cmpxchg_func_t (jint, volatile jint*, jint); 743 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong); 744 typedef jint add_func_t (jint, volatile jint*); 745 746 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { 747 // try to use the stub: 748 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); 749 750 if (func != NULL) { 751 os::atomic_xchg_func = func; 752 return (*func)(exchange_value, dest); 753 } 754 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 755 756 jint old_value = *dest; 757 *dest = exchange_value; 758 return old_value; 759 } 760 761 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { 762 // try to use the stub: 763 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); 764 765 if (func != NULL) { 766 os::atomic_cmpxchg_func = func; 767 return (*func)(exchange_value, dest, compare_value); 768 } 769 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 770 771 jint old_value = *dest; 772 if (old_value == compare_value) 773 *dest = exchange_value; 774 return old_value; 775 } 776 777 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { 778 // try to use the stub: 779 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); 780 781 if (func != NULL) { 782 os::atomic_cmpxchg_long_func = func; 783 return (*func)(exchange_value, dest, compare_value); 784 } 785 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 786 787 jlong old_value = *dest; 788 if (old_value == compare_value) 789 *dest = exchange_value; 790 return old_value; 791 } 792 793 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { 794 // try to use the stub: 795 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); 796 797 if (func != NULL) { 798 os::atomic_add_func = func; 799 return (*func)(add_value, dest); 800 } 801 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 802 803 return (*dest) += add_value; 804 } 805 806 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; 807 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; 808 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; 809 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; 810 811 #endif // !_LP64 && !COMPILER2 812 813 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE) 814 // See file build/solaris/makefiles/$compiler.make 815 // For compiler1 the architecture is v8 and frps isn't present in v8 816 extern "C" void _mark_fpu_nosave() { 817 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :); 818 } 819 #endif //defined(__sparc) && defined(COMPILER2) 820 821 #ifndef PRODUCT 822 void os::verify_stack_alignment() { 823 } 824 #endif 825 826 int os::extra_bang_size_in_bytes() { 827 // SPARC does not require an additional stack bang. 828 return 0; 829 }