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 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 #ifdef _LP64 89 size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K; 90 #else 91 size_t os::Posix::_vm_internal_thread_min_stack_allowed = 96 * K; 92 #endif 93 94 int os::Solaris::max_register_window_saves_before_flushing() { 95 // We should detect this at run time. For now, filling 96 // in with a constant. 97 return 8; 98 } 99 100 static void handle_unflushed_register_windows(gwindows_t *win) { 101 int restore_count = win->wbcnt; 102 int i; 103 104 for(i=0; i<restore_count; i++) { 105 address sp = ((address)win->spbuf[i]) + STACK_BIAS; 106 address reg_win = (address)&win->wbuf[i]; 107 memcpy(sp,reg_win,sizeof(struct rwindow)); 108 } 109 } 110 111 char* os::non_memory_address_word() { 112 // Must never look like an address returned by reserve_memory, 113 // even in its subfields (as defined by the CPU immediate fields, 114 // if the CPU splits constants across multiple instructions). 115 // On SPARC, 0 != %hi(any real address), because there is no 116 // allocation in the first 1Kb of the virtual address space. 117 return (char*) 0; 118 } 119 120 // Validate a ucontext retrieved from walking a uc_link of a ucontext. 121 // There are issues with libthread giving out uc_links for different threads 122 // on the same uc_link chain and bad or circular links. 123 // 124 bool os::Solaris::valid_ucontext(Thread* thread, const ucontext_t* valid, const ucontext_t* suspect) { 125 if (valid >= suspect || 126 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags || 127 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp || 128 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) { 129 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");) 130 return false; 131 } 132 133 if (thread->is_Java_thread()) { 134 if (!valid_stack_address(thread, (address)suspect)) { 135 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");) 136 return false; 137 } 138 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 139 if (!valid_stack_address(thread, _sp) || 140 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) { 141 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");) 142 return false; 143 } 144 } 145 return true; 146 } 147 148 // We will only follow one level of uc_link since there are libthread 149 // issues with ucontext linking and it is better to be safe and just 150 // let caller retry later. 151 const ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread, 152 const ucontext_t *uc) { 153 154 const ucontext_t *retuc = NULL; 155 156 // Sometimes the topmost register windows are not properly flushed. 157 // i.e., if the kernel would have needed to take a page fault 158 if (uc != NULL && uc->uc_mcontext.gwins != NULL) { 159 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 160 } 161 162 if (uc != NULL) { 163 if (uc->uc_link == NULL) { 164 // cannot validate without uc_link so accept current ucontext 165 retuc = uc; 166 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { 167 // first ucontext is valid so try the next one 168 uc = uc->uc_link; 169 if (uc->uc_link == NULL) { 170 // cannot validate without uc_link so accept current ucontext 171 retuc = uc; 172 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { 173 // the ucontext one level down is also valid so return it 174 retuc = uc; 175 } 176 } 177 } 178 return retuc; 179 } 180 181 // Assumes ucontext is valid 182 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(const ucontext_t *uc) { 183 address pc = (address)uc->uc_mcontext.gregs[REG_PC]; 184 // set npc to zero to avoid using it for safepoint, good for profiling only 185 return ExtendedPC(pc); 186 } 187 188 void os::Solaris::ucontext_set_pc(ucontext_t* uc, address pc) { 189 uc->uc_mcontext.gregs [REG_PC] = (greg_t) pc; 190 uc->uc_mcontext.gregs [REG_nPC] = (greg_t) (pc + 4); 191 } 192 193 // Assumes ucontext is valid 194 intptr_t* os::Solaris::ucontext_get_sp(const ucontext_t *uc) { 195 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 196 } 197 198 // Solaris X86 only 199 intptr_t* os::Solaris::ucontext_get_fp(const ucontext_t *uc) { 200 ShouldNotReachHere(); 201 return NULL; 202 } 203 204 address os::Solaris::ucontext_get_pc(const ucontext_t *uc) { 205 return (address) uc->uc_mcontext.gregs[REG_PC]; 206 } 207 208 209 // For Forte Analyzer AsyncGetCallTrace profiling support - thread 210 // is currently interrupted by SIGPROF. 211 // 212 // ret_fp parameter is only used by Solaris X86. 213 // 214 // The difference between this and os::fetch_frame_from_context() is that 215 // here we try to skip nested signal frames. 216 // This method is also used for stack overflow signal handling. 217 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread, 218 const ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { 219 220 assert(thread != NULL, "just checking"); 221 assert(ret_sp != NULL, "just checking"); 222 assert(ret_fp == NULL, "just checking"); 223 224 const ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc); 225 226 return os::fetch_frame_from_context(luc, ret_sp, ret_fp); 227 } 228 229 230 // ret_fp parameter is only used by Solaris X86. 231 ExtendedPC os::fetch_frame_from_context(const void* ucVoid, 232 intptr_t** ret_sp, intptr_t** ret_fp) { 233 234 ExtendedPC epc; 235 const ucontext_t *uc = (const ucontext_t*)ucVoid; 236 237 if (uc != NULL) { 238 epc = os::Solaris::ucontext_get_ExtendedPC(uc); 239 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc); 240 } else { 241 // construct empty ExtendedPC for return value checking 242 epc = ExtendedPC(NULL); 243 if (ret_sp) *ret_sp = (intptr_t *)NULL; 244 } 245 246 return epc; 247 } 248 249 frame os::fetch_frame_from_context(const void* ucVoid) { 250 intptr_t* sp; 251 intptr_t* fp; 252 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); 253 return frame(sp, frame::unpatchable, epc.pc()); 254 } 255 256 frame os::fetch_frame_from_ucontext(Thread* thread, void* ucVoid) { 257 intptr_t* sp; 258 ExtendedPC epc = os::Solaris::fetch_frame_from_ucontext(thread, (ucontext_t*)ucVoid, &sp, NULL); 259 return frame(sp, frame::unpatchable, epc.pc()); 260 } 261 262 bool os::Solaris::get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr) { 263 address pc = (address) os::Solaris::ucontext_get_pc(uc); 264 if (Interpreter::contains(pc)) { 265 *fr = os::fetch_frame_from_ucontext(thread, uc); 266 if (!fr->is_first_java_frame()) { 267 assert(fr->safe_for_sender(thread), "Safety check"); 268 *fr = fr->java_sender(); 269 } 270 } else { 271 // more complex code with compiled code 272 assert(!Interpreter::contains(pc), "Interpreted methods should have been handled above"); 273 CodeBlob* cb = CodeCache::find_blob(pc); 274 if (cb == NULL || !cb->is_nmethod() || cb->is_frame_complete_at(pc)) { 275 // Not sure where the pc points to, fallback to default 276 // stack overflow handling 277 return false; 278 } else { 279 // Returned frame will be the caller of the method that faults on the stack bang. 280 // Register window not yet rotated (happens at SAVE after stack bang), so there is no new 281 // frame to go with the faulting PC. Using caller SP that is still in SP, and caller PC 282 // that was written to O7 at call. 283 intptr_t* sp = os::Solaris::ucontext_get_sp(uc); 284 address pc = (address)uc->uc_mcontext.gregs[REG_O7]; 285 *fr = frame(sp, frame::unpatchable, pc); 286 287 if (!fr->is_java_frame()) { 288 assert(fr->safe_for_sender(thread), "Safety check"); 289 *fr = fr->java_sender(); 290 } 291 } 292 } 293 assert(fr->is_java_frame(), "Safety check"); 294 return true; 295 } 296 297 frame os::get_sender_for_C_frame(frame* fr) { 298 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc()); 299 } 300 301 // Returns an estimate of the current stack pointer. Result must be guaranteed to 302 // point into the calling threads stack, and be no lower than the current stack 303 // pointer. 304 address os::current_stack_pointer() { 305 volatile int dummy; 306 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 307 return sp; 308 } 309 310 frame os::current_frame() { 311 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); 312 frame myframe(sp, frame::unpatchable, 313 CAST_FROM_FN_PTR(address, os::current_frame)); 314 if (os::is_first_C_frame(&myframe)) { 315 // stack is not walkable 316 return frame(NULL, NULL, false); 317 } else { 318 return os::get_sender_for_C_frame(&myframe); 319 } 320 } 321 322 bool os::is_allocatable(size_t bytes) { 323 #ifdef _LP64 324 return true; 325 #else 326 return (bytes <= (size_t)3835*M); 327 #endif 328 } 329 330 extern "C" JNIEXPORT int 331 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, 332 int abort_if_unrecognized) { 333 ucontext_t* uc = (ucontext_t*) ucVoid; 334 335 Thread* t = Thread::current_or_null_safe(); 336 337 // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away 338 // (no destructors can be run) 339 os::WatcherThreadCrashProtection::check_crash_protection(sig, t); 340 341 SignalHandlerMark shm(t); 342 343 if(sig == SIGPIPE || sig == SIGXFSZ) { 344 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 345 return true; 346 } else { 347 // Ignoring SIGPIPE/SIGXFSZ - see bugs 4229104 or 6499219 348 return true; 349 } 350 } 351 352 JavaThread* thread = NULL; 353 VMThread* vmthread = NULL; 354 if (os::Solaris::signal_handlers_are_installed) { 355 if (t != NULL ){ 356 if(t->is_Java_thread()) { 357 thread = (JavaThread*)t; 358 } 359 else if(t->is_VM_thread()){ 360 vmthread = (VMThread *)t; 361 } 362 } 363 } 364 365 if (sig == os::Solaris::SIGasync()) { 366 if (thread || vmthread) { 367 OSThread::SR_handler(t, uc); 368 return true; 369 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { 370 return true; 371 } else { 372 // If os::Solaris::SIGasync not chained, and this is a non-vm and 373 // non-java thread 374 return true; 375 } 376 } 377 378 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { 379 // can't decode this kind of signal 380 info = NULL; 381 } else { 382 assert(sig == info->si_signo, "bad siginfo"); 383 } 384 385 // decide if this trap can be handled by a stub 386 address stub = NULL; 387 388 address pc = NULL; 389 address npc = NULL; 390 391 //%note os_trap_1 392 if (info != NULL && uc != NULL && thread != NULL) { 393 // factor me: getPCfromContext 394 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 395 npc = (address) uc->uc_mcontext.gregs[REG_nPC]; 396 397 // SafeFetch() support 398 if (StubRoutines::is_safefetch_fault(pc)) { 399 os::Solaris::ucontext_set_pc(uc, StubRoutines::continuation_for_safefetch_fault(pc)); 400 return 1; 401 } 402 403 // Handle ALL stack overflow variations here 404 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) { 405 address addr = (address) info->si_addr; 406 if (thread->in_stack_yellow_reserved_zone(addr)) { 407 // Sometimes the register windows are not properly flushed. 408 if(uc->uc_mcontext.gwins != NULL) { 409 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 410 } 411 if (thread->thread_state() == _thread_in_Java) { 412 if (thread->in_stack_reserved_zone(addr)) { 413 frame fr; 414 if (os::Solaris::get_frame_at_stack_banging_point(thread, uc, &fr)) { 415 assert(fr.is_java_frame(), "Must be a Java frame"); 416 frame activation = SharedRuntime::look_for_reserved_stack_annotated_method(thread, fr); 417 if (activation.sp() != NULL) { 418 thread->disable_stack_reserved_zone(); 419 RegisterMap map(thread); 420 int frame_size = activation.frame_size(&map); 421 thread->set_reserved_stack_activation((address)(((address)activation.sp()) - STACK_BIAS)); 422 return true; 423 } 424 } 425 } 426 // Throw a stack overflow exception. Guard pages will be reenabled 427 // while unwinding the stack. 428 thread->disable_stack_yellow_reserved_zone(); 429 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); 430 } else { 431 // Thread was in the vm or native code. Return and try to finish. 432 thread->disable_stack_yellow_reserved_zone(); 433 return true; 434 } 435 } else if (thread->in_stack_red_zone(addr)) { 436 // Fatal red zone violation. Disable the guard pages and fall through 437 // to handle_unexpected_exception way down below. 438 thread->disable_stack_red_zone(); 439 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); 440 // Sometimes the register windows are not properly flushed. 441 if(uc->uc_mcontext.gwins != NULL) { 442 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 443 } 444 } 445 } 446 447 448 if (thread->thread_state() == _thread_in_vm) { 449 if (sig == SIGBUS && thread->doing_unsafe_access()) { 450 stub = SharedRuntime::handle_unsafe_access(thread, npc); 451 } 452 } 453 454 else if (thread->thread_state() == _thread_in_Java) { 455 // Java thread running in Java code => find exception handler if any 456 // a fault inside compiled code, the interpreter, or a stub 457 458 // Support Safepoint Polling 459 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) { 460 stub = SharedRuntime::get_poll_stub(pc); 461 } 462 463 // Not needed on x86 solaris because verify_oops doesn't generate 464 // SEGV/BUS like sparc does. 465 if ( (sig == SIGSEGV || sig == SIGBUS) 466 && pc >= MacroAssembler::_verify_oop_implicit_branch[0] 467 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) { 468 stub = MacroAssembler::_verify_oop_implicit_branch[2]; 469 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr); 470 } 471 472 // This is not factored because on x86 solaris the patching for 473 // zombies does not generate a SEGV. 474 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) { 475 // zombie method (ld [%g0],%o7 instruction) 476 stub = SharedRuntime::get_handle_wrong_method_stub(); 477 478 // At the stub it needs to look like a call from the caller of this 479 // method (not a call from the segv site). 480 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 481 } 482 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { 483 // BugId 4454115: A read from a MappedByteBuffer can fault 484 // here if the underlying file has been truncated. 485 // Do not crash the VM in such a case. 486 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 487 CompiledMethod* nm = cb->as_compiled_method_or_null(); 488 if (nm != NULL && nm->has_unsafe_access()) { 489 stub = SharedRuntime::handle_unsafe_access(thread, npc); 490 } 491 } 492 493 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) { 494 // integer divide by zero 495 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 496 } 497 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { 498 // floating-point divide by zero 499 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 500 } 501 #ifdef COMPILER2 502 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) { 503 #ifdef ASSERT 504 #ifdef TIERED 505 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 506 assert(cb->is_compiled_by_c2(), "Wrong compiler"); 507 #endif // TIERED 508 #endif // ASSERT 509 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken. 510 stub = SharedRuntime::get_ic_miss_stub(); 511 // At the stub it needs to look like a call from the caller of this 512 // method (not a call from the segv site). 513 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 514 } 515 #endif // COMPILER2 516 517 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { 518 // Determination of interpreter/vtable stub/compiled code null exception 519 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 520 } 521 } 522 523 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in 524 // and the heap gets shrunk before the field access. 525 if ((sig == SIGSEGV) || (sig == SIGBUS)) { 526 address addr = JNI_FastGetField::find_slowcase_pc(pc); 527 if (addr != (address)-1) { 528 stub = addr; 529 } 530 } 531 532 // Check to see if we caught the safepoint code in the 533 // process of write protecting the memory serialization page. 534 // It write enables the page immediately after protecting it 535 // so just return. 536 if ((sig == SIGSEGV) && 537 os::is_memory_serialize_page(thread, (address)info->si_addr)) { 538 // Block current thread until the memory serialize page permission restored. 539 os::block_on_serialize_page_trap(); 540 return true; 541 } 542 } 543 544 if (stub != NULL) { 545 // save all thread context in case we need to restore it 546 547 thread->set_saved_exception_pc(pc); 548 thread->set_saved_exception_npc(npc); 549 550 // simulate a branch to the stub (a "call" in the safepoint stub case) 551 // factor me: setPC 552 os::Solaris::ucontext_set_pc(uc, stub); 553 554 return true; 555 } 556 557 // signal-chaining 558 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 559 return true; 560 } 561 562 if (!abort_if_unrecognized) { 563 // caller wants another chance, so give it to him 564 return false; 565 } 566 567 if (!os::Solaris::libjsig_is_loaded) { 568 struct sigaction oldAct; 569 sigaction(sig, (struct sigaction *)0, &oldAct); 570 if (oldAct.sa_sigaction != signalHandler) { 571 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 572 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 573 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand); 574 } 575 } 576 577 if (pc == NULL && uc != NULL) { 578 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 579 } 580 581 // Sometimes the register windows are not properly flushed. 582 if(uc->uc_mcontext.gwins != NULL) { 583 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 584 } 585 586 // unmask current signal 587 sigset_t newset; 588 sigemptyset(&newset); 589 sigaddset(&newset, sig); 590 sigprocmask(SIG_UNBLOCK, &newset, NULL); 591 592 // Determine which sort of error to throw. Out of swap may signal 593 // on the thread stack, which could get a mapping error when touched. 594 address addr = (address) info->si_addr; 595 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) { 596 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack."); 597 } 598 599 VMError::report_and_die(t, sig, pc, info, ucVoid); 600 601 ShouldNotReachHere(); 602 return false; 603 } 604 605 void os::print_context(outputStream *st, const void *context) { 606 if (context == NULL) return; 607 608 const ucontext_t *uc = (const ucontext_t*)context; 609 st->print_cr("Registers:"); 610 611 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT 612 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT, 613 uc->uc_mcontext.gregs[REG_G1], 614 uc->uc_mcontext.gregs[REG_G2], 615 uc->uc_mcontext.gregs[REG_G3], 616 uc->uc_mcontext.gregs[REG_G4]); 617 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT 618 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT, 619 uc->uc_mcontext.gregs[REG_G5], 620 uc->uc_mcontext.gregs[REG_G6], 621 uc->uc_mcontext.gregs[REG_G7], 622 uc->uc_mcontext.gregs[REG_Y]); 623 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT 624 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT, 625 uc->uc_mcontext.gregs[REG_O0], 626 uc->uc_mcontext.gregs[REG_O1], 627 uc->uc_mcontext.gregs[REG_O2], 628 uc->uc_mcontext.gregs[REG_O3]); 629 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT 630 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT, 631 uc->uc_mcontext.gregs[REG_O4], 632 uc->uc_mcontext.gregs[REG_O5], 633 uc->uc_mcontext.gregs[REG_O6], 634 uc->uc_mcontext.gregs[REG_O7]); 635 636 637 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 638 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT 639 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT, 640 sp[L0->sp_offset_in_saved_window()], 641 sp[L1->sp_offset_in_saved_window()], 642 sp[L2->sp_offset_in_saved_window()], 643 sp[L3->sp_offset_in_saved_window()]); 644 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT 645 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT, 646 sp[L4->sp_offset_in_saved_window()], 647 sp[L5->sp_offset_in_saved_window()], 648 sp[L6->sp_offset_in_saved_window()], 649 sp[L7->sp_offset_in_saved_window()]); 650 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT 651 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT, 652 sp[I0->sp_offset_in_saved_window()], 653 sp[I1->sp_offset_in_saved_window()], 654 sp[I2->sp_offset_in_saved_window()], 655 sp[I3->sp_offset_in_saved_window()]); 656 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT 657 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT, 658 sp[I4->sp_offset_in_saved_window()], 659 sp[I5->sp_offset_in_saved_window()], 660 sp[I6->sp_offset_in_saved_window()], 661 sp[I7->sp_offset_in_saved_window()]); 662 663 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT, 664 uc->uc_mcontext.gregs[REG_PC], 665 uc->uc_mcontext.gregs[REG_nPC]); 666 st->cr(); 667 st->cr(); 668 669 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); 670 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); 671 st->cr(); 672 673 // Note: it may be unsafe to inspect memory near pc. For example, pc may 674 // point to garbage if entry point in an nmethod is corrupted. Leave 675 // this at the end, and hope for the best. 676 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); 677 address pc = epc.pc(); 678 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); 679 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); 680 } 681 682 void os::print_register_info(outputStream *st, const void *context) { 683 if (context == NULL) return; 684 685 const ucontext_t *uc = (const ucontext_t*)context; 686 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 687 688 st->print_cr("Register to memory mapping:"); 689 st->cr(); 690 691 // this is only for the "general purpose" registers 692 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]); 693 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]); 694 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]); 695 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]); 696 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]); 697 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]); 698 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]); 699 st->cr(); 700 701 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]); 702 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]); 703 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]); 704 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]); 705 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]); 706 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]); 707 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]); 708 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]); 709 st->cr(); 710 711 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]); 712 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]); 713 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]); 714 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]); 715 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]); 716 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]); 717 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]); 718 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]); 719 st->cr(); 720 721 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]); 722 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]); 723 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]); 724 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]); 725 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]); 726 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]); 727 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]); 728 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]); 729 st->cr(); 730 } 731 732 void os::Solaris::init_thread_fpu_state(void) { 733 // Nothing needed on Sparc. 734 } 735 736 #if !defined(COMPILER2) && !defined(_LP64) 737 738 // These routines are the initial value of atomic_xchg_entry(), 739 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry() 740 // until initialization is complete. 741 // TODO - remove when the VM drops support for V8. 742 743 typedef jint xchg_func_t (jint, volatile jint*); 744 typedef jint cmpxchg_func_t (jint, volatile jint*, jint); 745 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong); 746 typedef jint add_func_t (jint, volatile jint*); 747 748 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { 749 // try to use the stub: 750 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); 751 752 if (func != NULL) { 753 os::atomic_xchg_func = func; 754 return (*func)(exchange_value, dest); 755 } 756 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 757 758 jint old_value = *dest; 759 *dest = exchange_value; 760 return old_value; 761 } 762 763 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { 764 // try to use the stub: 765 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); 766 767 if (func != NULL) { 768 os::atomic_cmpxchg_func = func; 769 return (*func)(exchange_value, dest, compare_value); 770 } 771 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 772 773 jint old_value = *dest; 774 if (old_value == compare_value) 775 *dest = exchange_value; 776 return old_value; 777 } 778 779 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { 780 // try to use the stub: 781 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); 782 783 if (func != NULL) { 784 os::atomic_cmpxchg_long_func = func; 785 return (*func)(exchange_value, dest, compare_value); 786 } 787 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 788 789 jlong old_value = *dest; 790 if (old_value == compare_value) 791 *dest = exchange_value; 792 return old_value; 793 } 794 795 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { 796 // try to use the stub: 797 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); 798 799 if (func != NULL) { 800 os::atomic_add_func = func; 801 return (*func)(add_value, dest); 802 } 803 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 804 805 return (*dest) += add_value; 806 } 807 808 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; 809 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; 810 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; 811 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; 812 813 #endif // !_LP64 && !COMPILER2 814 815 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE) 816 // See file build/solaris/makefiles/$compiler.make 817 // For compiler1 the architecture is v8 and frps isn't present in v8 818 extern "C" void _mark_fpu_nosave() { 819 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :); 820 } 821 #endif //defined(__sparc) && defined(COMPILER2) 822 823 #ifndef PRODUCT 824 void os::verify_stack_alignment() { 825 } 826 #endif 827 828 int os::extra_bang_size_in_bytes() { 829 // SPARC does not require an additional stack bang. 830 return 0; 831 }