1 /* 2 * Copyright (c) 1999, 2020, 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 "jvm.h" 27 #include "asm/macroAssembler.hpp" 28 #include "macroAssembler_sparc.hpp" 29 #include "classfile/classLoader.hpp" 30 #include "classfile/systemDictionary.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "code/codeCache.hpp" 33 #include "code/icBuffer.hpp" 34 #include "code/vtableStubs.hpp" 35 #include "interpreter/interpreter.hpp" 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_misc.hpp" 41 #include "runtime/arguments.hpp" 42 #include "runtime/extendedPC.hpp" 43 #include "runtime/frame.inline.hpp" 44 #include "runtime/interfaceSupport.inline.hpp" 45 #include "runtime/java.hpp" 46 #include "runtime/javaCalls.hpp" 47 #include "runtime/mutexLocker.hpp" 48 #include "runtime/osThread.hpp" 49 #include "runtime/safepointMechanism.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 usable stack sizes required to get to user code. Space for 85 // HotSpot guard pages is added later. 86 size_t os::Posix::_compiler_thread_min_stack_allowed = 104 * K; 87 size_t os::Posix::_java_thread_min_stack_allowed = 86 * K; 88 size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K; 89 90 static void handle_unflushed_register_windows(gwindows_t *win) { 91 int restore_count = win->wbcnt; 92 int i; 93 94 for(i=0; i<restore_count; i++) { 95 address sp = ((address)win->spbuf[i]) + STACK_BIAS; 96 address reg_win = (address)&win->wbuf[i]; 97 memcpy(sp,reg_win,sizeof(struct rwindow)); 98 } 99 } 100 101 char* os::non_memory_address_word() { 102 // Must never look like an address returned by reserve_memory, 103 // even in its subfields (as defined by the CPU immediate fields, 104 // if the CPU splits constants across multiple instructions). 105 // On SPARC, 0 != %hi(any real address), because there is no 106 // allocation in the first 1Kb of the virtual address space. 107 return (char*) 0; 108 } 109 110 // Validate a ucontext retrieved from walking a uc_link of a ucontext. 111 // There are issues with libthread giving out uc_links for different threads 112 // on the same uc_link chain and bad or circular links. 113 // 114 bool os::Solaris::valid_ucontext(Thread* thread, const ucontext_t* valid, const ucontext_t* suspect) { 115 if (valid >= suspect || 116 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags || 117 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp || 118 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) { 119 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");) 120 return false; 121 } 122 123 if (thread->is_Java_thread()) { 124 if (!thread->is_in_full_stack_checked((address)suspect)) { 125 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");) 126 return false; 127 } 128 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 129 if (!thread->is_in_full_stack_checked(_sp) || 130 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) { 131 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");) 132 return false; 133 } 134 } 135 return true; 136 } 137 138 // We will only follow one level of uc_link since there are libthread 139 // issues with ucontext linking and it is better to be safe and just 140 // let caller retry later. 141 const ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread, 142 const ucontext_t *uc) { 143 144 const ucontext_t *retuc = NULL; 145 146 // Sometimes the topmost register windows are not properly flushed. 147 // i.e., if the kernel would have needed to take a page fault 148 if (uc != NULL && uc->uc_mcontext.gwins != NULL) { 149 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 150 } 151 152 if (uc != NULL) { 153 if (uc->uc_link == NULL) { 154 // cannot validate without uc_link so accept current ucontext 155 retuc = uc; 156 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { 157 // first ucontext is valid so try the next one 158 uc = uc->uc_link; 159 if (uc->uc_link == NULL) { 160 // cannot validate without uc_link so accept current ucontext 161 retuc = uc; 162 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { 163 // the ucontext one level down is also valid so return it 164 retuc = uc; 165 } 166 } 167 } 168 return retuc; 169 } 170 171 // Assumes ucontext is valid 172 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(const ucontext_t *uc) { 173 address pc = (address)uc->uc_mcontext.gregs[REG_PC]; 174 // set npc to zero to avoid using it for safepoint, good for profiling only 175 return ExtendedPC(pc); 176 } 177 178 void os::Solaris::ucontext_set_pc(ucontext_t* uc, address pc) { 179 uc->uc_mcontext.gregs [REG_PC] = (greg_t) pc; 180 uc->uc_mcontext.gregs [REG_nPC] = (greg_t) (pc + 4); 181 } 182 183 // Assumes ucontext is valid 184 intptr_t* os::Solaris::ucontext_get_sp(const ucontext_t *uc) { 185 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 186 } 187 188 // Solaris X86 only 189 intptr_t* os::Solaris::ucontext_get_fp(const ucontext_t *uc) { 190 ShouldNotReachHere(); 191 return NULL; 192 } 193 194 address os::Solaris::ucontext_get_pc(const ucontext_t *uc) { 195 return (address) uc->uc_mcontext.gregs[REG_PC]; 196 } 197 198 199 // For Forte Analyzer AsyncGetCallTrace profiling support - thread 200 // is currently interrupted by SIGPROF. 201 // 202 // ret_fp parameter is only used by Solaris X86. 203 // 204 // The difference between this and os::fetch_frame_from_context() is that 205 // here we try to skip nested signal frames. 206 // This method is also used for stack overflow signal handling. 207 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread, 208 const ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { 209 210 assert(thread != NULL, "just checking"); 211 assert(ret_sp != NULL, "just checking"); 212 assert(ret_fp == NULL, "just checking"); 213 214 const ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc); 215 216 return os::fetch_frame_from_context(luc, ret_sp, ret_fp); 217 } 218 219 220 // ret_fp parameter is only used by Solaris X86. 221 ExtendedPC os::fetch_frame_from_context(const void* ucVoid, 222 intptr_t** ret_sp, intptr_t** ret_fp) { 223 224 ExtendedPC epc; 225 const ucontext_t *uc = (const ucontext_t*)ucVoid; 226 227 if (uc != NULL) { 228 epc = os::Solaris::ucontext_get_ExtendedPC(uc); 229 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc); 230 } else { 231 // construct empty ExtendedPC for return value checking 232 epc = ExtendedPC(NULL); 233 if (ret_sp) *ret_sp = (intptr_t *)NULL; 234 } 235 236 return epc; 237 } 238 239 frame os::fetch_frame_from_context(const void* ucVoid) { 240 intptr_t* sp; 241 intptr_t* fp; 242 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); 243 return frame(sp, frame::unpatchable, epc.pc()); 244 } 245 246 frame os::fetch_frame_from_ucontext(Thread* thread, void* ucVoid) { 247 intptr_t* sp; 248 ExtendedPC epc = os::Solaris::fetch_frame_from_ucontext(thread, (ucontext_t*)ucVoid, &sp, NULL); 249 return frame(sp, frame::unpatchable, epc.pc()); 250 } 251 252 bool os::Solaris::get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr) { 253 address pc = (address) os::Solaris::ucontext_get_pc(uc); 254 if (Interpreter::contains(pc)) { 255 *fr = os::fetch_frame_from_ucontext(thread, uc); 256 if (!fr->is_first_java_frame()) { 257 assert(fr->safe_for_sender(thread), "Safety check"); 258 *fr = fr->java_sender(); 259 } 260 } else { 261 // more complex code with compiled code 262 assert(!Interpreter::contains(pc), "Interpreted methods should have been handled above"); 263 CodeBlob* cb = CodeCache::find_blob(pc); 264 if (cb == NULL || !cb->is_nmethod() || cb->is_frame_complete_at(pc)) { 265 // Not sure where the pc points to, fallback to default 266 // stack overflow handling 267 return false; 268 } else { 269 // Returned frame will be the caller of the method that faults on the stack bang. 270 // Register window not yet rotated (happens at SAVE after stack bang), so there is no new 271 // frame to go with the faulting PC. Using caller SP that is still in SP, and caller PC 272 // that was written to O7 at call. 273 intptr_t* sp = os::Solaris::ucontext_get_sp(uc); 274 address pc = (address)uc->uc_mcontext.gregs[REG_O7]; 275 *fr = frame(sp, frame::unpatchable, pc); 276 277 if (!fr->is_java_frame()) { 278 assert(fr->safe_for_sender(thread), "Safety check"); 279 *fr = fr->java_sender(); 280 } 281 } 282 } 283 assert(fr->is_java_frame(), "Safety check"); 284 return true; 285 } 286 287 frame os::get_sender_for_C_frame(frame* fr) { 288 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc()); 289 } 290 291 // Returns an estimate of the current stack pointer. Result must be guaranteed to 292 // point into the calling threads stack, and be no lower than the current stack 293 // pointer. 294 address os::current_stack_pointer() { 295 volatile int dummy; 296 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 297 return sp; 298 } 299 300 frame os::current_frame() { 301 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); 302 frame myframe(sp, frame::unpatchable, 303 CAST_FROM_FN_PTR(address, os::current_frame)); 304 if (os::is_first_C_frame(&myframe)) { 305 // stack is not walkable 306 return frame(NULL, NULL, false); 307 } else { 308 return os::get_sender_for_C_frame(&myframe); 309 } 310 } 311 312 bool os::is_allocatable(size_t bytes) { 313 return true; 314 } 315 316 extern "C" JNIEXPORT int 317 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, 318 int abort_if_unrecognized) { 319 ucontext_t* uc = (ucontext_t*) ucVoid; 320 321 Thread* t = Thread::current_or_null_safe(); 322 323 // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away 324 // (no destructors can be run) 325 os::ThreadCrashProtection::check_crash_protection(sig, t); 326 327 SignalHandlerMark shm(t); 328 329 if(sig == SIGPIPE || sig == SIGXFSZ) { 330 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 331 return true; 332 } else { 333 // Ignoring SIGPIPE/SIGXFSZ - see bugs 4229104 or 6499219 334 return true; 335 } 336 } 337 338 JavaThread* thread = NULL; 339 VMThread* vmthread = NULL; 340 if (os::Solaris::signal_handlers_are_installed) { 341 if (t != NULL ){ 342 if(t->is_Java_thread()) { 343 thread = (JavaThread*)t; 344 } 345 else if(t->is_VM_thread()){ 346 vmthread = (VMThread *)t; 347 } 348 } 349 } 350 351 if (sig == ASYNC_SIGNAL) { 352 if (thread || vmthread) { 353 OSThread::SR_handler(t, uc); 354 return true; 355 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { 356 return true; 357 } else { 358 // If ASYNC_SIGNAL not chained, and this is a non-vm and 359 // non-java thread 360 return true; 361 } 362 } 363 364 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { 365 // can't decode this kind of signal 366 info = NULL; 367 } else { 368 assert(sig == info->si_signo, "bad siginfo"); 369 } 370 371 // decide if this trap can be handled by a stub 372 address stub = NULL; 373 374 address pc = NULL; 375 address npc = NULL; 376 377 //%note os_trap_1 378 if (info != NULL && uc != NULL && thread != NULL) { 379 // factor me: getPCfromContext 380 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 381 npc = (address) uc->uc_mcontext.gregs[REG_nPC]; 382 383 // SafeFetch() support 384 if (StubRoutines::is_safefetch_fault(pc)) { 385 os::Solaris::ucontext_set_pc(uc, StubRoutines::continuation_for_safefetch_fault(pc)); 386 return 1; 387 } 388 389 // Handle ALL stack overflow variations here 390 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) { 391 address addr = (address) info->si_addr; 392 if (thread->in_stack_yellow_reserved_zone(addr)) { 393 // Sometimes the register windows are not properly flushed. 394 if(uc->uc_mcontext.gwins != NULL) { 395 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 396 } 397 if (thread->thread_state() == _thread_in_Java) { 398 if (thread->in_stack_reserved_zone(addr)) { 399 frame fr; 400 if (os::Solaris::get_frame_at_stack_banging_point(thread, uc, &fr)) { 401 assert(fr.is_java_frame(), "Must be a Java frame"); 402 frame activation = SharedRuntime::look_for_reserved_stack_annotated_method(thread, fr); 403 if (activation.sp() != NULL) { 404 thread->disable_stack_reserved_zone(); 405 RegisterMap map(thread); 406 int frame_size = activation.frame_size(&map); 407 thread->set_reserved_stack_activation((address)(((address)activation.sp()) - STACK_BIAS)); 408 return true; 409 } 410 } 411 } 412 // Throw a stack overflow exception. Guard pages will be reenabled 413 // while unwinding the stack. 414 thread->disable_stack_yellow_reserved_zone(); 415 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); 416 } else { 417 // Thread was in the vm or native code. Return and try to finish. 418 thread->disable_stack_yellow_reserved_zone(); 419 return true; 420 } 421 } else if (thread->in_stack_red_zone(addr)) { 422 // Fatal red zone violation. Disable the guard pages and fall through 423 // to handle_unexpected_exception way down below. 424 thread->disable_stack_red_zone(); 425 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); 426 // Sometimes the register windows are not properly flushed. 427 if(uc->uc_mcontext.gwins != NULL) { 428 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 429 } 430 } 431 } 432 433 434 if (thread->thread_state() == _thread_in_vm || 435 thread->thread_state() == _thread_in_native) { 436 if (sig == SIGBUS && thread->doing_unsafe_access()) { 437 if (UnsafeCopyMemory::contains_pc(pc)) { 438 npc = UnsafeCopyMemory::page_error_continue_pc(pc); 439 } 440 stub = SharedRuntime::handle_unsafe_access(thread, npc); 441 } 442 } 443 444 else if (thread->thread_state() == _thread_in_Java) { 445 // Java thread running in Java code => find exception handler if any 446 // a fault inside compiled code, the interpreter, or a stub 447 448 // Support Safepoint Polling 449 if (sig == SIGSEGV && SafepointMechanism::is_poll_address((address)info->si_addr)) { 450 stub = SharedRuntime::get_poll_stub(pc); 451 } 452 453 // Not needed on x86 solaris because verify_oops doesn't generate 454 // SEGV/BUS like sparc does. 455 if ( (sig == SIGSEGV || sig == SIGBUS) 456 && pc >= MacroAssembler::_verify_oop_implicit_branch[0] 457 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) { 458 stub = MacroAssembler::_verify_oop_implicit_branch[2]; 459 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr); 460 } 461 462 // This is not factored because on x86 solaris the patching for 463 // zombies does not generate a SEGV. 464 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) { 465 // zombie method (ld [%g0],%o7 instruction) 466 stub = SharedRuntime::get_handle_wrong_method_stub(); 467 468 // At the stub it needs to look like a call from the caller of this 469 // method (not a call from the segv site). 470 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 471 } 472 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { 473 // BugId 4454115: A read from a MappedByteBuffer can fault 474 // here if the underlying file has been truncated. 475 // Do not crash the VM in such a case. 476 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 477 CompiledMethod* nm = cb->as_compiled_method_or_null(); 478 bool is_unsafe_arraycopy = (thread->doing_unsafe_access() && UnsafeCopyMemory::contains_pc(pc)); 479 if ((nm != NULL && nm->has_unsafe_access()) || is_unsafe_arraycopy) { 480 if (is_unsafe_arraycopy) { 481 npc = UnsafeCopyMemory::page_error_continue_pc(pc); 482 } 483 stub = SharedRuntime::handle_unsafe_access(thread, npc); 484 } 485 } 486 487 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) { 488 // integer divide by zero 489 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 490 } 491 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { 492 // floating-point divide by zero 493 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 494 } 495 #ifdef COMPILER2 496 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) { 497 #ifdef ASSERT 498 #ifdef TIERED 499 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 500 assert(cb->is_compiled_by_c2(), "Wrong compiler"); 501 #endif // TIERED 502 #endif // ASSERT 503 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken. 504 stub = SharedRuntime::get_ic_miss_stub(); 505 // At the stub it needs to look like a call from the caller of this 506 // method (not a call from the segv site). 507 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 508 } 509 #endif // COMPILER2 510 511 else if (sig == SIGSEGV && info->si_code > 0 && MacroAssembler::uses_implicit_null_check(info->si_addr)) { 512 // Determination of interpreter/vtable stub/compiled code null exception 513 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 514 } 515 } 516 517 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in 518 // and the heap gets shrunk before the field access. 519 if ((sig == SIGSEGV) || (sig == SIGBUS)) { 520 address addr = JNI_FastGetField::find_slowcase_pc(pc); 521 if (addr != (address)-1) { 522 stub = addr; 523 } 524 } 525 } 526 527 if (stub != NULL) { 528 // save all thread context in case we need to restore it 529 530 thread->set_saved_exception_pc(pc); 531 thread->set_saved_exception_npc(npc); 532 533 // simulate a branch to the stub (a "call" in the safepoint stub case) 534 // factor me: setPC 535 os::Solaris::ucontext_set_pc(uc, stub); 536 537 return true; 538 } 539 540 // signal-chaining 541 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 542 return true; 543 } 544 545 if (!abort_if_unrecognized) { 546 // caller wants another chance, so give it to him 547 return false; 548 } 549 550 if (!os::Solaris::libjsig_is_loaded) { 551 struct sigaction oldAct; 552 sigaction(sig, (struct sigaction *)0, &oldAct); 553 if (oldAct.sa_sigaction != signalHandler) { 554 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 555 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 556 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand); 557 } 558 } 559 560 if (pc == NULL && uc != NULL) { 561 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 562 } 563 564 // Sometimes the register windows are not properly flushed. 565 if(uc->uc_mcontext.gwins != NULL) { 566 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 567 } 568 569 // unmask current signal 570 sigset_t newset; 571 sigemptyset(&newset); 572 sigaddset(&newset, sig); 573 sigprocmask(SIG_UNBLOCK, &newset, NULL); 574 575 // Determine which sort of error to throw. Out of swap may signal 576 // on the thread stack, which could get a mapping error when touched. 577 address addr = (address) info->si_addr; 578 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) { 579 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack."); 580 } 581 582 VMError::report_and_die(t, sig, pc, info, ucVoid); 583 584 ShouldNotReachHere(); 585 return false; 586 } 587 588 void os::print_context(outputStream *st, const void *context) { 589 if (context == NULL) return; 590 591 const ucontext_t *uc = (const ucontext_t*)context; 592 st->print_cr("Registers:"); 593 594 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT 595 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT, 596 uc->uc_mcontext.gregs[REG_G1], 597 uc->uc_mcontext.gregs[REG_G2], 598 uc->uc_mcontext.gregs[REG_G3], 599 uc->uc_mcontext.gregs[REG_G4]); 600 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT 601 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT, 602 uc->uc_mcontext.gregs[REG_G5], 603 uc->uc_mcontext.gregs[REG_G6], 604 uc->uc_mcontext.gregs[REG_G7], 605 uc->uc_mcontext.gregs[REG_Y]); 606 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT 607 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT, 608 uc->uc_mcontext.gregs[REG_O0], 609 uc->uc_mcontext.gregs[REG_O1], 610 uc->uc_mcontext.gregs[REG_O2], 611 uc->uc_mcontext.gregs[REG_O3]); 612 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT 613 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT, 614 uc->uc_mcontext.gregs[REG_O4], 615 uc->uc_mcontext.gregs[REG_O5], 616 uc->uc_mcontext.gregs[REG_O6], 617 uc->uc_mcontext.gregs[REG_O7]); 618 619 620 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 621 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT 622 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT, 623 sp[L0->sp_offset_in_saved_window()], 624 sp[L1->sp_offset_in_saved_window()], 625 sp[L2->sp_offset_in_saved_window()], 626 sp[L3->sp_offset_in_saved_window()]); 627 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT 628 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT, 629 sp[L4->sp_offset_in_saved_window()], 630 sp[L5->sp_offset_in_saved_window()], 631 sp[L6->sp_offset_in_saved_window()], 632 sp[L7->sp_offset_in_saved_window()]); 633 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT 634 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT, 635 sp[I0->sp_offset_in_saved_window()], 636 sp[I1->sp_offset_in_saved_window()], 637 sp[I2->sp_offset_in_saved_window()], 638 sp[I3->sp_offset_in_saved_window()]); 639 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT 640 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT, 641 sp[I4->sp_offset_in_saved_window()], 642 sp[I5->sp_offset_in_saved_window()], 643 sp[I6->sp_offset_in_saved_window()], 644 sp[I7->sp_offset_in_saved_window()]); 645 646 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT, 647 uc->uc_mcontext.gregs[REG_PC], 648 uc->uc_mcontext.gregs[REG_nPC]); 649 st->cr(); 650 st->cr(); 651 652 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); 653 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); 654 st->cr(); 655 656 // Note: it may be unsafe to inspect memory near pc. For example, pc may 657 // point to garbage if entry point in an nmethod is corrupted. Leave 658 // this at the end, and hope for the best. 659 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); 660 address pc = epc.pc(); 661 print_instructions(st, pc, sizeof(char)); 662 st->cr(); 663 } 664 665 void os::print_register_info(outputStream *st, const void *context) { 666 if (context == NULL) return; 667 668 const ucontext_t *uc = (const ucontext_t*)context; 669 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 670 671 st->print_cr("Register to memory mapping:"); 672 st->cr(); 673 674 // this is only for the "general purpose" registers 675 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]); 676 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]); 677 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]); 678 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]); 679 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]); 680 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]); 681 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]); 682 st->cr(); 683 684 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]); 685 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]); 686 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]); 687 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]); 688 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]); 689 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]); 690 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]); 691 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]); 692 st->cr(); 693 694 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]); 695 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]); 696 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]); 697 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]); 698 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]); 699 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]); 700 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]); 701 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]); 702 st->cr(); 703 704 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]); 705 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]); 706 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]); 707 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]); 708 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]); 709 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]); 710 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]); 711 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]); 712 st->cr(); 713 } 714 715 void os::Solaris::init_thread_fpu_state(void) { 716 // Nothing needed on Sparc. 717 } 718 719 #ifndef PRODUCT 720 void os::verify_stack_alignment() { 721 } 722 #endif 723 724 int os::extra_bang_size_in_bytes() { 725 // SPARC does not require an additional stack bang. 726 return 0; 727 }