1/* 2 * Copyright (c) 1999, 2017, 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. 86size_t os::Posix::_compiler_thread_min_stack_allowed = 104 * K; 87size_t os::Posix::_java_thread_min_stack_allowed = 86 * K; 88size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K; 89 90int os::Solaris::max_register_window_saves_before_flushing() { 91 // We should detect this at run time. For now, filling 92 // in with a constant. 93 return 8; 94} 95 96static void handle_unflushed_register_windows(gwindows_t *win) { 97 int restore_count = win->wbcnt; 98 int i; 99 100 for(i=0; i<restore_count; i++) { 101 address sp = ((address)win->spbuf[i]) + STACK_BIAS; 102 address reg_win = (address)&win->wbuf[i]; 103 memcpy(sp,reg_win,sizeof(struct rwindow)); 104 } 105} 106 107char* os::non_memory_address_word() { 108 // Must never look like an address returned by reserve_memory, 109 // even in its subfields (as defined by the CPU immediate fields, 110 // if the CPU splits constants across multiple instructions). 111 // On SPARC, 0 != %hi(any real address), because there is no 112 // allocation in the first 1Kb of the virtual address space. 113 return (char*) 0; 114} 115 116// Validate a ucontext retrieved from walking a uc_link of a ucontext. 117// There are issues with libthread giving out uc_links for different threads 118// on the same uc_link chain and bad or circular links. 119// 120bool os::Solaris::valid_ucontext(Thread* thread, const ucontext_t* valid, const ucontext_t* suspect) { 121 if (valid >= suspect || 122 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags || 123 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp || 124 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) { 125 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");) 126 return false; 127 } 128 129 if (thread->is_Java_thread()) { 130 if (!valid_stack_address(thread, (address)suspect)) { 131 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");) 132 return false; 133 } 134 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 135 if (!valid_stack_address(thread, _sp) || 136 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) { 137 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");) 138 return false; 139 } 140 } 141 return true; 142} 143 144// We will only follow one level of uc_link since there are libthread 145// issues with ucontext linking and it is better to be safe and just 146// let caller retry later. 147const ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread, 148 const ucontext_t *uc) { 149 150 const ucontext_t *retuc = NULL; 151 152 // Sometimes the topmost register windows are not properly flushed. 153 // i.e., if the kernel would have needed to take a page fault 154 if (uc != NULL && uc->uc_mcontext.gwins != NULL) { 155 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 156 } 157 158 if (uc != NULL) { 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 // first ucontext is valid so try the next one 164 uc = uc->uc_link; 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 // the ucontext one level down is also valid so return it 170 retuc = uc; 171 } 172 } 173 } 174 return retuc; 175} 176 177// Assumes ucontext is valid 178ExtendedPC os::Solaris::ucontext_get_ExtendedPC(const ucontext_t *uc) { 179 address pc = (address)uc->uc_mcontext.gregs[REG_PC]; 180 // set npc to zero to avoid using it for safepoint, good for profiling only 181 return ExtendedPC(pc); 182} 183 184void os::Solaris::ucontext_set_pc(ucontext_t* uc, address pc) { 185 uc->uc_mcontext.gregs [REG_PC] = (greg_t) pc; 186 uc->uc_mcontext.gregs [REG_nPC] = (greg_t) (pc + 4); 187} 188 189// Assumes ucontext is valid 190intptr_t* os::Solaris::ucontext_get_sp(const ucontext_t *uc) { 191 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 192} 193 194// Solaris X86 only 195intptr_t* os::Solaris::ucontext_get_fp(const ucontext_t *uc) { 196 ShouldNotReachHere(); 197 return NULL; 198} 199 200address os::Solaris::ucontext_get_pc(const ucontext_t *uc) { 201 return (address) uc->uc_mcontext.gregs[REG_PC]; 202} 203 204 205// For Forte Analyzer AsyncGetCallTrace profiling support - thread 206// is currently interrupted by SIGPROF. 207// 208// ret_fp parameter is only used by Solaris X86. 209// 210// The difference between this and os::fetch_frame_from_context() is that 211// here we try to skip nested signal frames. 212// This method is also used for stack overflow signal handling. 213ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread, 214 const ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { 215 216 assert(thread != NULL, "just checking"); 217 assert(ret_sp != NULL, "just checking"); 218 assert(ret_fp == NULL, "just checking"); 219 220 const ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc); 221 222 return os::fetch_frame_from_context(luc, ret_sp, ret_fp); 223} 224 225 226// ret_fp parameter is only used by Solaris X86. 227ExtendedPC os::fetch_frame_from_context(const void* ucVoid, 228 intptr_t** ret_sp, intptr_t** ret_fp) { 229 230 ExtendedPC epc; 231 const ucontext_t *uc = (const ucontext_t*)ucVoid; 232 233 if (uc != NULL) { 234 epc = os::Solaris::ucontext_get_ExtendedPC(uc); 235 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc); 236 } else { 237 // construct empty ExtendedPC for return value checking 238 epc = ExtendedPC(NULL); 239 if (ret_sp) *ret_sp = (intptr_t *)NULL; 240 } 241 242 return epc; 243} 244 245frame os::fetch_frame_from_context(const void* ucVoid) { 246 intptr_t* sp; 247 intptr_t* fp; 248 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); 249 return frame(sp, frame::unpatchable, epc.pc()); 250} 251 252frame os::fetch_frame_from_ucontext(Thread* thread, void* ucVoid) { 253 intptr_t* sp; 254 ExtendedPC epc = os::Solaris::fetch_frame_from_ucontext(thread, (ucontext_t*)ucVoid, &sp, NULL); 255 return frame(sp, frame::unpatchable, epc.pc()); 256} 257 258bool os::Solaris::get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr) { 259 address pc = (address) os::Solaris::ucontext_get_pc(uc); 260 if (Interpreter::contains(pc)) { 261 *fr = os::fetch_frame_from_ucontext(thread, uc); 262 if (!fr->is_first_java_frame()) { 263 assert(fr->safe_for_sender(thread), "Safety check"); 264 *fr = fr->java_sender(); 265 } 266 } else { 267 // more complex code with compiled code 268 assert(!Interpreter::contains(pc), "Interpreted methods should have been handled above"); 269 CodeBlob* cb = CodeCache::find_blob(pc); 270 if (cb == NULL || !cb->is_nmethod() || cb->is_frame_complete_at(pc)) { 271 // Not sure where the pc points to, fallback to default 272 // stack overflow handling 273 return false; 274 } else { 275 // Returned frame will be the caller of the method that faults on the stack bang. 276 // Register window not yet rotated (happens at SAVE after stack bang), so there is no new 277 // frame to go with the faulting PC. Using caller SP that is still in SP, and caller PC 278 // that was written to O7 at call. 279 intptr_t* sp = os::Solaris::ucontext_get_sp(uc); 280 address pc = (address)uc->uc_mcontext.gregs[REG_O7]; 281 *fr = frame(sp, frame::unpatchable, pc); 282 283 if (!fr->is_java_frame()) { 284 assert(fr->safe_for_sender(thread), "Safety check"); 285 *fr = fr->java_sender(); 286 } 287 } 288 } 289 assert(fr->is_java_frame(), "Safety check"); 290 return true; 291} 292 293frame os::get_sender_for_C_frame(frame* fr) { 294 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc()); 295} 296 297// Returns an estimate of the current stack pointer. Result must be guaranteed to 298// point into the calling threads stack, and be no lower than the current stack 299// pointer. 300address os::current_stack_pointer() { 301 volatile int dummy; 302 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 303 return sp; 304} 305 306frame os::current_frame() { 307 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); 308 frame myframe(sp, frame::unpatchable, 309 CAST_FROM_FN_PTR(address, os::current_frame)); 310 if (os::is_first_C_frame(&myframe)) { 311 // stack is not walkable 312 return frame(NULL, NULL, false); 313 } else { 314 return os::get_sender_for_C_frame(&myframe); 315 } 316} 317 318bool os::is_allocatable(size_t bytes) { 319 return true; 320} 321 322extern "C" JNIEXPORT int 323JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, 324 int abort_if_unrecognized) { 325 ucontext_t* uc = (ucontext_t*) ucVoid; 326 327 Thread* t = Thread::current_or_null_safe(); 328 329 // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away 330 // (no destructors can be run) 331 os::ThreadCrashProtection::check_crash_protection(sig, t); 332 333 SignalHandlerMark shm(t); 334 335 if(sig == SIGPIPE || sig == SIGXFSZ) { 336 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 337 return true; 338 } else { 339 // Ignoring SIGPIPE/SIGXFSZ - see bugs 4229104 or 6499219 340 return true; 341 } 342 } 343 344 JavaThread* thread = NULL; 345 VMThread* vmthread = NULL; 346 if (os::Solaris::signal_handlers_are_installed) { 347 if (t != NULL ){ 348 if(t->is_Java_thread()) { 349 thread = (JavaThread*)t; 350 } 351 else if(t->is_VM_thread()){ 352 vmthread = (VMThread *)t; 353 } 354 } 355 } 356 357 if (sig == ASYNC_SIGNAL) { 358 if (thread || vmthread) { 359 OSThread::SR_handler(t, uc); 360 return true; 361 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { 362 return true; 363 } else { 364 // If ASYNC_SIGNAL not chained, and this is a non-vm and 365 // non-java thread 366 return true; 367 } 368 } 369 370 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { 371 // can't decode this kind of signal 372 info = NULL; 373 } else { 374 assert(sig == info->si_signo, "bad siginfo"); 375 } 376 377 // decide if this trap can be handled by a stub 378 address stub = NULL; 379 380 address pc = NULL; 381 address npc = NULL; 382 383 //%note os_trap_1 384 if (info != NULL && uc != NULL && thread != NULL) { 385 // factor me: getPCfromContext 386 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 387 npc = (address) uc->uc_mcontext.gregs[REG_nPC]; 388 389 // SafeFetch() support 390 if (StubRoutines::is_safefetch_fault(pc)) { 391 os::Solaris::ucontext_set_pc(uc, StubRoutines::continuation_for_safefetch_fault(pc)); 392 return 1; 393 } 394 395 // Handle ALL stack overflow variations here 396 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) { 397 address addr = (address) info->si_addr; 398 if (thread->in_stack_yellow_reserved_zone(addr)) { 399 // Sometimes the register windows are not properly flushed. 400 if(uc->uc_mcontext.gwins != NULL) { 401 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 402 } 403 if (thread->thread_state() == _thread_in_Java) { 404 if (thread->in_stack_reserved_zone(addr)) { 405 frame fr; 406 if (os::Solaris::get_frame_at_stack_banging_point(thread, uc, &fr)) { 407 assert(fr.is_java_frame(), "Must be a Java frame"); 408 frame activation = SharedRuntime::look_for_reserved_stack_annotated_method(thread, fr); 409 if (activation.sp() != NULL) { 410 thread->disable_stack_reserved_zone(); 411 RegisterMap map(thread); 412 int frame_size = activation.frame_size(&map); 413 thread->set_reserved_stack_activation((address)(((address)activation.sp()) - STACK_BIAS)); 414 return true; 415 } 416 } 417 } 418 // Throw a stack overflow exception. Guard pages will be reenabled 419 // while unwinding the stack. 420 thread->disable_stack_yellow_reserved_zone(); 421 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); 422 } else { 423 // Thread was in the vm or native code. Return and try to finish. 424 thread->disable_stack_yellow_reserved_zone(); 425 return true; 426 } 427 } else if (thread->in_stack_red_zone(addr)) { 428 // Fatal red zone violation. Disable the guard pages and fall through 429 // to handle_unexpected_exception way down below. 430 thread->disable_stack_red_zone(); 431 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); 432 // Sometimes the register windows are not properly flushed. 433 if(uc->uc_mcontext.gwins != NULL) { 434 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 435 } 436 } 437 } 438 439 440 if (thread->thread_state() == _thread_in_vm) { 441 if (sig == SIGBUS && thread->doing_unsafe_access()) { 442 stub = SharedRuntime::handle_unsafe_access(thread, npc); 443 } 444 } 445 446 else if (thread->thread_state() == _thread_in_Java) { 447 // Java thread running in Java code => find exception handler if any 448 // a fault inside compiled code, the interpreter, or a stub 449 450 // Support Safepoint Polling 451 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) { 452 stub = SharedRuntime::get_poll_stub(pc); 453 } 454 455 // Not needed on x86 solaris because verify_oops doesn't generate 456 // SEGV/BUS like sparc does. 457 if ( (sig == SIGSEGV || sig == SIGBUS) 458 && pc >= MacroAssembler::_verify_oop_implicit_branch[0] 459 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) { 460 stub = MacroAssembler::_verify_oop_implicit_branch[2]; 461 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr); 462 } 463 464 // This is not factored because on x86 solaris the patching for 465 // zombies does not generate a SEGV. 466 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) { 467 // zombie method (ld [%g0],%o7 instruction) 468 stub = SharedRuntime::get_handle_wrong_method_stub(); 469 470 // At the stub it needs to look like a call from the caller of this 471 // method (not a call from the segv site). 472 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 473 } 474 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { 475 // BugId 4454115: A read from a MappedByteBuffer can fault 476 // here if the underlying file has been truncated. 477 // Do not crash the VM in such a case. 478 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 479 CompiledMethod* nm = cb->as_compiled_method_or_null(); 480 if (nm != NULL && nm->has_unsafe_access()) { 481 stub = SharedRuntime::handle_unsafe_access(thread, npc); 482 } 483 } 484 485 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) { 486 // integer divide by zero 487 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 488 } 489 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { 490 // floating-point divide by zero 491 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 492 } 493#ifdef COMPILER2 494 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) { 495#ifdef ASSERT 496 #ifdef TIERED 497 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 498 assert(cb->is_compiled_by_c2(), "Wrong compiler"); 499 #endif // TIERED 500#endif // ASSERT 501 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken. 502 stub = SharedRuntime::get_ic_miss_stub(); 503 // At the stub it needs to look like a call from the caller of this 504 // method (not a call from the segv site). 505 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 506 } 507#endif // COMPILER2 508 509 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { 510 // Determination of interpreter/vtable stub/compiled code null exception 511 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 512 } 513 } 514 515 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in 516 // and the heap gets shrunk before the field access. 517 if ((sig == SIGSEGV) || (sig == SIGBUS)) { 518 address addr = JNI_FastGetField::find_slowcase_pc(pc); 519 if (addr != (address)-1) { 520 stub = addr; 521 } 522 } 523 524 // Check to see if we caught the safepoint code in the 525 // process of write protecting the memory serialization page. 526 // It write enables the page immediately after protecting it 527 // so just return. 528 if ((sig == SIGSEGV) && 529 os::is_memory_serialize_page(thread, (address)info->si_addr)) { 530 // Block current thread until the memory serialize page permission restored. 531 os::block_on_serialize_page_trap(); 532 return true; 533 } 534 } 535 536 if (stub != NULL) { 537 // save all thread context in case we need to restore it 538 539 thread->set_saved_exception_pc(pc); 540 thread->set_saved_exception_npc(npc); 541 542 // simulate a branch to the stub (a "call" in the safepoint stub case) 543 // factor me: setPC 544 os::Solaris::ucontext_set_pc(uc, stub); 545 546 return true; 547 } 548 549 // signal-chaining 550 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 551 return true; 552 } 553 554 if (!abort_if_unrecognized) { 555 // caller wants another chance, so give it to him 556 return false; 557 } 558 559 if (!os::Solaris::libjsig_is_loaded) { 560 struct sigaction oldAct; 561 sigaction(sig, (struct sigaction *)0, &oldAct); 562 if (oldAct.sa_sigaction != signalHandler) { 563 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 564 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 565 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand); 566 } 567 } 568 569 if (pc == NULL && uc != NULL) { 570 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 571 } 572 573 // Sometimes the register windows are not properly flushed. 574 if(uc->uc_mcontext.gwins != NULL) { 575 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 576 } 577 578 // unmask current signal 579 sigset_t newset; 580 sigemptyset(&newset); 581 sigaddset(&newset, sig); 582 sigprocmask(SIG_UNBLOCK, &newset, NULL); 583 584 // Determine which sort of error to throw. Out of swap may signal 585 // on the thread stack, which could get a mapping error when touched. 586 address addr = (address) info->si_addr; 587 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) { 588 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack."); 589 } 590 591 VMError::report_and_die(t, sig, pc, info, ucVoid); 592 593 ShouldNotReachHere(); 594 return false; 595} 596 597void os::print_context(outputStream *st, const void *context) { 598 if (context == NULL) return; 599 600 const ucontext_t *uc = (const ucontext_t*)context; 601 st->print_cr("Registers:"); 602 603 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT 604 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT, 605 uc->uc_mcontext.gregs[REG_G1], 606 uc->uc_mcontext.gregs[REG_G2], 607 uc->uc_mcontext.gregs[REG_G3], 608 uc->uc_mcontext.gregs[REG_G4]); 609 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT 610 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT, 611 uc->uc_mcontext.gregs[REG_G5], 612 uc->uc_mcontext.gregs[REG_G6], 613 uc->uc_mcontext.gregs[REG_G7], 614 uc->uc_mcontext.gregs[REG_Y]); 615 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT 616 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT, 617 uc->uc_mcontext.gregs[REG_O0], 618 uc->uc_mcontext.gregs[REG_O1], 619 uc->uc_mcontext.gregs[REG_O2], 620 uc->uc_mcontext.gregs[REG_O3]); 621 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT 622 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT, 623 uc->uc_mcontext.gregs[REG_O4], 624 uc->uc_mcontext.gregs[REG_O5], 625 uc->uc_mcontext.gregs[REG_O6], 626 uc->uc_mcontext.gregs[REG_O7]); 627 628 629 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 630 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT 631 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT, 632 sp[L0->sp_offset_in_saved_window()], 633 sp[L1->sp_offset_in_saved_window()], 634 sp[L2->sp_offset_in_saved_window()], 635 sp[L3->sp_offset_in_saved_window()]); 636 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT 637 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT, 638 sp[L4->sp_offset_in_saved_window()], 639 sp[L5->sp_offset_in_saved_window()], 640 sp[L6->sp_offset_in_saved_window()], 641 sp[L7->sp_offset_in_saved_window()]); 642 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT 643 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT, 644 sp[I0->sp_offset_in_saved_window()], 645 sp[I1->sp_offset_in_saved_window()], 646 sp[I2->sp_offset_in_saved_window()], 647 sp[I3->sp_offset_in_saved_window()]); 648 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT 649 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT, 650 sp[I4->sp_offset_in_saved_window()], 651 sp[I5->sp_offset_in_saved_window()], 652 sp[I6->sp_offset_in_saved_window()], 653 sp[I7->sp_offset_in_saved_window()]); 654 655 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT, 656 uc->uc_mcontext.gregs[REG_PC], 657 uc->uc_mcontext.gregs[REG_nPC]); 658 st->cr(); 659 st->cr(); 660 661 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); 662 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); 663 st->cr(); 664 665 // Note: it may be unsafe to inspect memory near pc. For example, pc may 666 // point to garbage if entry point in an nmethod is corrupted. Leave 667 // this at the end, and hope for the best. 668 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); 669 address pc = epc.pc(); 670 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); 671 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); 672} 673 674void os::print_register_info(outputStream *st, const void *context) { 675 if (context == NULL) return; 676 677 const ucontext_t *uc = (const ucontext_t*)context; 678 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 679 680 st->print_cr("Register to memory mapping:"); 681 st->cr(); 682 683 // this is only for the "general purpose" registers 684 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]); 685 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]); 686 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]); 687 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]); 688 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]); 689 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]); 690 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]); 691 st->cr(); 692 693 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]); 694 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]); 695 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]); 696 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]); 697 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]); 698 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]); 699 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]); 700 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]); 701 st->cr(); 702 703 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]); 704 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]); 705 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]); 706 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]); 707 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]); 708 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]); 709 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]); 710 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]); 711 st->cr(); 712 713 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]); 714 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]); 715 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]); 716 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]); 717 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]); 718 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]); 719 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]); 720 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]); 721 st->cr(); 722} 723 724void os::Solaris::init_thread_fpu_state(void) { 725 // Nothing needed on Sparc. 726} 727 728#ifndef PRODUCT 729void os::verify_stack_alignment() { 730} 731#endif 732 733int os::extra_bang_size_in_bytes() { 734 // SPARC does not require an additional stack bang. 735 return 0; 736} 737