os_solaris_sparc.cpp revision 11979:e7203436d63d
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 87size_t os::Posix::_compiler_thread_min_stack_allowed = 128 * K; 88size_t os::Posix::_java_thread_min_stack_allowed = 128 * K; 89size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K; 90#else 91size_t os::Posix::_compiler_thread_min_stack_allowed = 96 * K; 92size_t os::Posix::_java_thread_min_stack_allowed = 96 * K; 93size_t os::Posix::_vm_internal_thread_min_stack_allowed = 96 * K; 94#endif 95 96int os::Solaris::max_register_window_saves_before_flushing() { 97 // We should detect this at run time. For now, filling 98 // in with a constant. 99 return 8; 100} 101 102static void handle_unflushed_register_windows(gwindows_t *win) { 103 int restore_count = win->wbcnt; 104 int i; 105 106 for(i=0; i<restore_count; i++) { 107 address sp = ((address)win->spbuf[i]) + STACK_BIAS; 108 address reg_win = (address)&win->wbuf[i]; 109 memcpy(sp,reg_win,sizeof(struct rwindow)); 110 } 111} 112 113char* os::non_memory_address_word() { 114 // Must never look like an address returned by reserve_memory, 115 // even in its subfields (as defined by the CPU immediate fields, 116 // if the CPU splits constants across multiple instructions). 117 // On SPARC, 0 != %hi(any real address), because there is no 118 // allocation in the first 1Kb of the virtual address space. 119 return (char*) 0; 120} 121 122// Validate a ucontext retrieved from walking a uc_link of a ucontext. 123// There are issues with libthread giving out uc_links for different threads 124// on the same uc_link chain and bad or circular links. 125// 126bool os::Solaris::valid_ucontext(Thread* thread, const ucontext_t* valid, const ucontext_t* suspect) { 127 if (valid >= suspect || 128 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags || 129 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp || 130 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) { 131 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");) 132 return false; 133 } 134 135 if (thread->is_Java_thread()) { 136 if (!valid_stack_address(thread, (address)suspect)) { 137 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");) 138 return false; 139 } 140 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 141 if (!valid_stack_address(thread, _sp) || 142 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) { 143 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");) 144 return false; 145 } 146 } 147 return true; 148} 149 150// We will only follow one level of uc_link since there are libthread 151// issues with ucontext linking and it is better to be safe and just 152// let caller retry later. 153const ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread, 154 const ucontext_t *uc) { 155 156 const ucontext_t *retuc = NULL; 157 158 // Sometimes the topmost register windows are not properly flushed. 159 // i.e., if the kernel would have needed to take a page fault 160 if (uc != NULL && uc->uc_mcontext.gwins != NULL) { 161 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 162 } 163 164 if (uc != NULL) { 165 if (uc->uc_link == NULL) { 166 // cannot validate without uc_link so accept current ucontext 167 retuc = uc; 168 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { 169 // first ucontext is valid so try the next one 170 uc = uc->uc_link; 171 if (uc->uc_link == NULL) { 172 // cannot validate without uc_link so accept current ucontext 173 retuc = uc; 174 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { 175 // the ucontext one level down is also valid so return it 176 retuc = uc; 177 } 178 } 179 } 180 return retuc; 181} 182 183// Assumes ucontext is valid 184ExtendedPC os::Solaris::ucontext_get_ExtendedPC(const ucontext_t *uc) { 185 address pc = (address)uc->uc_mcontext.gregs[REG_PC]; 186 // set npc to zero to avoid using it for safepoint, good for profiling only 187 return ExtendedPC(pc); 188} 189 190void os::Solaris::ucontext_set_pc(ucontext_t* uc, address pc) { 191 uc->uc_mcontext.gregs [REG_PC] = (greg_t) pc; 192 uc->uc_mcontext.gregs [REG_nPC] = (greg_t) (pc + 4); 193} 194 195// Assumes ucontext is valid 196intptr_t* os::Solaris::ucontext_get_sp(const ucontext_t *uc) { 197 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 198} 199 200// Solaris X86 only 201intptr_t* os::Solaris::ucontext_get_fp(const ucontext_t *uc) { 202 ShouldNotReachHere(); 203 return NULL; 204} 205 206address os::Solaris::ucontext_get_pc(const ucontext_t *uc) { 207 return (address) uc->uc_mcontext.gregs[REG_PC]; 208} 209 210 211// For Forte Analyzer AsyncGetCallTrace profiling support - thread 212// is currently interrupted by SIGPROF. 213// 214// ret_fp parameter is only used by Solaris X86. 215// 216// The difference between this and os::fetch_frame_from_context() is that 217// here we try to skip nested signal frames. 218// This method is also used for stack overflow signal handling. 219ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread, 220 const ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { 221 222 assert(thread != NULL, "just checking"); 223 assert(ret_sp != NULL, "just checking"); 224 assert(ret_fp == NULL, "just checking"); 225 226 const ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc); 227 228 return os::fetch_frame_from_context(luc, ret_sp, ret_fp); 229} 230 231 232// ret_fp parameter is only used by Solaris X86. 233ExtendedPC os::fetch_frame_from_context(const void* ucVoid, 234 intptr_t** ret_sp, intptr_t** ret_fp) { 235 236 ExtendedPC epc; 237 const ucontext_t *uc = (const ucontext_t*)ucVoid; 238 239 if (uc != NULL) { 240 epc = os::Solaris::ucontext_get_ExtendedPC(uc); 241 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc); 242 } else { 243 // construct empty ExtendedPC for return value checking 244 epc = ExtendedPC(NULL); 245 if (ret_sp) *ret_sp = (intptr_t *)NULL; 246 } 247 248 return epc; 249} 250 251frame os::fetch_frame_from_context(const void* ucVoid) { 252 intptr_t* sp; 253 intptr_t* fp; 254 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); 255 return frame(sp, frame::unpatchable, epc.pc()); 256} 257 258frame os::fetch_frame_from_ucontext(Thread* thread, void* ucVoid) { 259 intptr_t* sp; 260 ExtendedPC epc = os::Solaris::fetch_frame_from_ucontext(thread, (ucontext_t*)ucVoid, &sp, NULL); 261 return frame(sp, frame::unpatchable, epc.pc()); 262} 263 264bool os::Solaris::get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr) { 265 address pc = (address) os::Solaris::ucontext_get_pc(uc); 266 if (Interpreter::contains(pc)) { 267 *fr = os::fetch_frame_from_ucontext(thread, uc); 268 if (!fr->is_first_java_frame()) { 269 assert(fr->safe_for_sender(thread), "Safety check"); 270 *fr = fr->java_sender(); 271 } 272 } else { 273 // more complex code with compiled code 274 assert(!Interpreter::contains(pc), "Interpreted methods should have been handled above"); 275 CodeBlob* cb = CodeCache::find_blob(pc); 276 if (cb == NULL || !cb->is_nmethod() || cb->is_frame_complete_at(pc)) { 277 // Not sure where the pc points to, fallback to default 278 // stack overflow handling 279 return false; 280 } else { 281 // Returned frame will be the caller of the method that faults on the stack bang. 282 // Register window not yet rotated (happens at SAVE after stack bang), so there is no new 283 // frame to go with the faulting PC. Using caller SP that is still in SP, and caller PC 284 // that was written to O7 at call. 285 intptr_t* sp = os::Solaris::ucontext_get_sp(uc); 286 address pc = (address)uc->uc_mcontext.gregs[REG_O7]; 287 *fr = frame(sp, frame::unpatchable, pc); 288 289 if (!fr->is_java_frame()) { 290 assert(fr->safe_for_sender(thread), "Safety check"); 291 *fr = fr->java_sender(); 292 } 293 } 294 } 295 assert(fr->is_java_frame(), "Safety check"); 296 return true; 297} 298 299frame os::get_sender_for_C_frame(frame* fr) { 300 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc()); 301} 302 303// Returns an estimate of the current stack pointer. Result must be guaranteed to 304// point into the calling threads stack, and be no lower than the current stack 305// pointer. 306address os::current_stack_pointer() { 307 volatile int dummy; 308 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 309 return sp; 310} 311 312frame os::current_frame() { 313 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); 314 frame myframe(sp, frame::unpatchable, 315 CAST_FROM_FN_PTR(address, os::current_frame)); 316 if (os::is_first_C_frame(&myframe)) { 317 // stack is not walkable 318 return frame(NULL, NULL, false); 319 } else { 320 return os::get_sender_for_C_frame(&myframe); 321 } 322} 323 324bool os::is_allocatable(size_t bytes) { 325#ifdef _LP64 326 return true; 327#else 328 return (bytes <= (size_t)3835*M); 329#endif 330} 331 332extern "C" JNIEXPORT int 333JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, 334 int abort_if_unrecognized) { 335 ucontext_t* uc = (ucontext_t*) ucVoid; 336 337 Thread* t = Thread::current_or_null_safe(); 338 339 // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away 340 // (no destructors can be run) 341 os::WatcherThreadCrashProtection::check_crash_protection(sig, t); 342 343 SignalHandlerMark shm(t); 344 345 if(sig == SIGPIPE || sig == SIGXFSZ) { 346 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 347 return true; 348 } else { 349 // Ignoring SIGPIPE/SIGXFSZ - see bugs 4229104 or 6499219 350 return true; 351 } 352 } 353 354 JavaThread* thread = NULL; 355 VMThread* vmthread = NULL; 356 if (os::Solaris::signal_handlers_are_installed) { 357 if (t != NULL ){ 358 if(t->is_Java_thread()) { 359 thread = (JavaThread*)t; 360 } 361 else if(t->is_VM_thread()){ 362 vmthread = (VMThread *)t; 363 } 364 } 365 } 366 367 if (sig == os::Solaris::SIGasync()) { 368 if (thread || vmthread) { 369 OSThread::SR_handler(t, uc); 370 return true; 371 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { 372 return true; 373 } else { 374 // If os::Solaris::SIGasync not chained, and this is a non-vm and 375 // non-java thread 376 return true; 377 } 378 } 379 380 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { 381 // can't decode this kind of signal 382 info = NULL; 383 } else { 384 assert(sig == info->si_signo, "bad siginfo"); 385 } 386 387 // decide if this trap can be handled by a stub 388 address stub = NULL; 389 390 address pc = NULL; 391 address npc = NULL; 392 393 //%note os_trap_1 394 if (info != NULL && uc != NULL && thread != NULL) { 395 // factor me: getPCfromContext 396 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 397 npc = (address) uc->uc_mcontext.gregs[REG_nPC]; 398 399 // SafeFetch() support 400 if (StubRoutines::is_safefetch_fault(pc)) { 401 os::Solaris::ucontext_set_pc(uc, StubRoutines::continuation_for_safefetch_fault(pc)); 402 return 1; 403 } 404 405 // Handle ALL stack overflow variations here 406 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) { 407 address addr = (address) info->si_addr; 408 if (thread->in_stack_yellow_reserved_zone(addr)) { 409 // Sometimes the register windows are not properly flushed. 410 if(uc->uc_mcontext.gwins != NULL) { 411 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 412 } 413 if (thread->thread_state() == _thread_in_Java) { 414 if (thread->in_stack_reserved_zone(addr)) { 415 frame fr; 416 if (os::Solaris::get_frame_at_stack_banging_point(thread, uc, &fr)) { 417 assert(fr.is_java_frame(), "Must be a Java frame"); 418 frame activation = SharedRuntime::look_for_reserved_stack_annotated_method(thread, fr); 419 if (activation.sp() != NULL) { 420 thread->disable_stack_reserved_zone(); 421 RegisterMap map(thread); 422 int frame_size = activation.frame_size(&map); 423 thread->set_reserved_stack_activation((address)(((address)activation.sp()) - STACK_BIAS)); 424 return true; 425 } 426 } 427 } 428 // Throw a stack overflow exception. Guard pages will be reenabled 429 // while unwinding the stack. 430 thread->disable_stack_yellow_reserved_zone(); 431 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); 432 } else { 433 // Thread was in the vm or native code. Return and try to finish. 434 thread->disable_stack_yellow_reserved_zone(); 435 return true; 436 } 437 } else if (thread->in_stack_red_zone(addr)) { 438 // Fatal red zone violation. Disable the guard pages and fall through 439 // to handle_unexpected_exception way down below. 440 thread->disable_stack_red_zone(); 441 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); 442 // Sometimes the register windows are not properly flushed. 443 if(uc->uc_mcontext.gwins != NULL) { 444 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 445 } 446 } 447 } 448 449 450 if (thread->thread_state() == _thread_in_vm) { 451 if (sig == SIGBUS && thread->doing_unsafe_access()) { 452 stub = SharedRuntime::handle_unsafe_access(thread, npc); 453 } 454 } 455 456 else if (thread->thread_state() == _thread_in_Java) { 457 // Java thread running in Java code => find exception handler if any 458 // a fault inside compiled code, the interpreter, or a stub 459 460 // Support Safepoint Polling 461 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) { 462 stub = SharedRuntime::get_poll_stub(pc); 463 } 464 465 // Not needed on x86 solaris because verify_oops doesn't generate 466 // SEGV/BUS like sparc does. 467 if ( (sig == SIGSEGV || sig == SIGBUS) 468 && pc >= MacroAssembler::_verify_oop_implicit_branch[0] 469 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) { 470 stub = MacroAssembler::_verify_oop_implicit_branch[2]; 471 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr); 472 } 473 474 // This is not factored because on x86 solaris the patching for 475 // zombies does not generate a SEGV. 476 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) { 477 // zombie method (ld [%g0],%o7 instruction) 478 stub = SharedRuntime::get_handle_wrong_method_stub(); 479 480 // At the stub it needs to look like a call from the caller of this 481 // method (not a call from the segv site). 482 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 483 } 484 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { 485 // BugId 4454115: A read from a MappedByteBuffer can fault 486 // here if the underlying file has been truncated. 487 // Do not crash the VM in such a case. 488 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 489 CompiledMethod* nm = cb->as_compiled_method_or_null(); 490 if (nm != NULL && nm->has_unsafe_access()) { 491 stub = SharedRuntime::handle_unsafe_access(thread, npc); 492 } 493 } 494 495 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) { 496 // integer divide by zero 497 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 498 } 499 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { 500 // floating-point divide by zero 501 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 502 } 503#ifdef COMPILER2 504 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) { 505#ifdef ASSERT 506 #ifdef TIERED 507 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 508 assert(cb->is_compiled_by_c2(), "Wrong compiler"); 509 #endif // TIERED 510#endif // ASSERT 511 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken. 512 stub = SharedRuntime::get_ic_miss_stub(); 513 // At the stub it needs to look like a call from the caller of this 514 // method (not a call from the segv site). 515 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 516 } 517#endif // COMPILER2 518 519 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { 520 // Determination of interpreter/vtable stub/compiled code null exception 521 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 522 } 523 } 524 525 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in 526 // and the heap gets shrunk before the field access. 527 if ((sig == SIGSEGV) || (sig == SIGBUS)) { 528 address addr = JNI_FastGetField::find_slowcase_pc(pc); 529 if (addr != (address)-1) { 530 stub = addr; 531 } 532 } 533 534 // Check to see if we caught the safepoint code in the 535 // process of write protecting the memory serialization page. 536 // It write enables the page immediately after protecting it 537 // so just return. 538 if ((sig == SIGSEGV) && 539 os::is_memory_serialize_page(thread, (address)info->si_addr)) { 540 // Block current thread until the memory serialize page permission restored. 541 os::block_on_serialize_page_trap(); 542 return true; 543 } 544 } 545 546 if (stub != NULL) { 547 // save all thread context in case we need to restore it 548 549 thread->set_saved_exception_pc(pc); 550 thread->set_saved_exception_npc(npc); 551 552 // simulate a branch to the stub (a "call" in the safepoint stub case) 553 // factor me: setPC 554 os::Solaris::ucontext_set_pc(uc, stub); 555 556 return true; 557 } 558 559 // signal-chaining 560 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 561 return true; 562 } 563 564 if (!abort_if_unrecognized) { 565 // caller wants another chance, so give it to him 566 return false; 567 } 568 569 if (!os::Solaris::libjsig_is_loaded) { 570 struct sigaction oldAct; 571 sigaction(sig, (struct sigaction *)0, &oldAct); 572 if (oldAct.sa_sigaction != signalHandler) { 573 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 574 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 575 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand); 576 } 577 } 578 579 if (pc == NULL && uc != NULL) { 580 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 581 } 582 583 // Sometimes the register windows are not properly flushed. 584 if(uc->uc_mcontext.gwins != NULL) { 585 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 586 } 587 588 // unmask current signal 589 sigset_t newset; 590 sigemptyset(&newset); 591 sigaddset(&newset, sig); 592 sigprocmask(SIG_UNBLOCK, &newset, NULL); 593 594 // Determine which sort of error to throw. Out of swap may signal 595 // on the thread stack, which could get a mapping error when touched. 596 address addr = (address) info->si_addr; 597 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) { 598 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack."); 599 } 600 601 VMError::report_and_die(t, sig, pc, info, ucVoid); 602 603 ShouldNotReachHere(); 604 return false; 605} 606 607void os::print_context(outputStream *st, const void *context) { 608 if (context == NULL) return; 609 610 const ucontext_t *uc = (const ucontext_t*)context; 611 st->print_cr("Registers:"); 612 613 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT 614 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT, 615 uc->uc_mcontext.gregs[REG_G1], 616 uc->uc_mcontext.gregs[REG_G2], 617 uc->uc_mcontext.gregs[REG_G3], 618 uc->uc_mcontext.gregs[REG_G4]); 619 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT 620 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT, 621 uc->uc_mcontext.gregs[REG_G5], 622 uc->uc_mcontext.gregs[REG_G6], 623 uc->uc_mcontext.gregs[REG_G7], 624 uc->uc_mcontext.gregs[REG_Y]); 625 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT 626 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT, 627 uc->uc_mcontext.gregs[REG_O0], 628 uc->uc_mcontext.gregs[REG_O1], 629 uc->uc_mcontext.gregs[REG_O2], 630 uc->uc_mcontext.gregs[REG_O3]); 631 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT 632 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT, 633 uc->uc_mcontext.gregs[REG_O4], 634 uc->uc_mcontext.gregs[REG_O5], 635 uc->uc_mcontext.gregs[REG_O6], 636 uc->uc_mcontext.gregs[REG_O7]); 637 638 639 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 640 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT 641 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT, 642 sp[L0->sp_offset_in_saved_window()], 643 sp[L1->sp_offset_in_saved_window()], 644 sp[L2->sp_offset_in_saved_window()], 645 sp[L3->sp_offset_in_saved_window()]); 646 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT 647 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT, 648 sp[L4->sp_offset_in_saved_window()], 649 sp[L5->sp_offset_in_saved_window()], 650 sp[L6->sp_offset_in_saved_window()], 651 sp[L7->sp_offset_in_saved_window()]); 652 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT 653 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT, 654 sp[I0->sp_offset_in_saved_window()], 655 sp[I1->sp_offset_in_saved_window()], 656 sp[I2->sp_offset_in_saved_window()], 657 sp[I3->sp_offset_in_saved_window()]); 658 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT 659 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT, 660 sp[I4->sp_offset_in_saved_window()], 661 sp[I5->sp_offset_in_saved_window()], 662 sp[I6->sp_offset_in_saved_window()], 663 sp[I7->sp_offset_in_saved_window()]); 664 665 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT, 666 uc->uc_mcontext.gregs[REG_PC], 667 uc->uc_mcontext.gregs[REG_nPC]); 668 st->cr(); 669 st->cr(); 670 671 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); 672 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); 673 st->cr(); 674 675 // Note: it may be unsafe to inspect memory near pc. For example, pc may 676 // point to garbage if entry point in an nmethod is corrupted. Leave 677 // this at the end, and hope for the best. 678 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); 679 address pc = epc.pc(); 680 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); 681 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); 682} 683 684void os::print_register_info(outputStream *st, const void *context) { 685 if (context == NULL) return; 686 687 const ucontext_t *uc = (const ucontext_t*)context; 688 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 689 690 st->print_cr("Register to memory mapping:"); 691 st->cr(); 692 693 // this is only for the "general purpose" registers 694 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]); 695 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]); 696 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]); 697 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]); 698 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]); 699 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]); 700 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]); 701 st->cr(); 702 703 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]); 704 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]); 705 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]); 706 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]); 707 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]); 708 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]); 709 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]); 710 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]); 711 st->cr(); 712 713 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]); 714 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]); 715 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]); 716 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]); 717 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]); 718 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]); 719 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]); 720 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]); 721 st->cr(); 722 723 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]); 724 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]); 725 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]); 726 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]); 727 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]); 728 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]); 729 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]); 730 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]); 731 st->cr(); 732} 733 734void os::Solaris::init_thread_fpu_state(void) { 735 // Nothing needed on Sparc. 736} 737 738#if !defined(COMPILER2) && !defined(_LP64) 739 740// These routines are the initial value of atomic_xchg_entry(), 741// atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry() 742// until initialization is complete. 743// TODO - remove when the VM drops support for V8. 744 745typedef jint xchg_func_t (jint, volatile jint*); 746typedef jint cmpxchg_func_t (jint, volatile jint*, jint); 747typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong); 748typedef jint add_func_t (jint, volatile jint*); 749 750jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { 751 // try to use the stub: 752 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); 753 754 if (func != NULL) { 755 os::atomic_xchg_func = func; 756 return (*func)(exchange_value, dest); 757 } 758 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 759 760 jint old_value = *dest; 761 *dest = exchange_value; 762 return old_value; 763} 764 765jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { 766 // try to use the stub: 767 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); 768 769 if (func != NULL) { 770 os::atomic_cmpxchg_func = func; 771 return (*func)(exchange_value, dest, compare_value); 772 } 773 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 774 775 jint old_value = *dest; 776 if (old_value == compare_value) 777 *dest = exchange_value; 778 return old_value; 779} 780 781jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { 782 // try to use the stub: 783 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); 784 785 if (func != NULL) { 786 os::atomic_cmpxchg_long_func = func; 787 return (*func)(exchange_value, dest, compare_value); 788 } 789 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 790 791 jlong old_value = *dest; 792 if (old_value == compare_value) 793 *dest = exchange_value; 794 return old_value; 795} 796 797jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { 798 // try to use the stub: 799 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); 800 801 if (func != NULL) { 802 os::atomic_add_func = func; 803 return (*func)(add_value, dest); 804 } 805 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 806 807 return (*dest) += add_value; 808} 809 810xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; 811cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; 812cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; 813add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; 814 815#endif // !_LP64 && !COMPILER2 816 817#if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE) 818 // See file build/solaris/makefiles/$compiler.make 819 // For compiler1 the architecture is v8 and frps isn't present in v8 820 extern "C" void _mark_fpu_nosave() { 821 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :); 822 } 823#endif //defined(__sparc) && defined(COMPILER2) 824 825#ifndef PRODUCT 826void os::verify_stack_alignment() { 827} 828#endif 829 830int os::extra_bang_size_in_bytes() { 831 // SPARC does not require an additional stack bang. 832 return 0; 833} 834