os_solaris_sparc.cpp revision 2072:d70fe6ab4436
1/* 2 * Copyright (c) 1999, 2010, 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 "assembler_sparc.inline.hpp" 27#include "classfile/classLoader.hpp" 28#include "classfile/systemDictionary.hpp" 29#include "classfile/vmSymbols.hpp" 30#include "code/icBuffer.hpp" 31#include "code/vtableStubs.hpp" 32#include "interpreter/interpreter.hpp" 33#include "jvm_solaris.h" 34#include "memory/allocation.inline.hpp" 35#include "mutex_solaris.inline.hpp" 36#include "nativeInst_sparc.hpp" 37#include "os_share_solaris.hpp" 38#include "prims/jniFastGetField.hpp" 39#include "prims/jvm.h" 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.hpp" 45#include "runtime/java.hpp" 46#include "runtime/javaCalls.hpp" 47#include "runtime/mutexLocker.hpp" 48#include "runtime/osThread.hpp" 49#include "runtime/sharedRuntime.hpp" 50#include "runtime/stubRoutines.hpp" 51#include "runtime/timer.hpp" 52#include "thread_solaris.inline.hpp" 53#include "utilities/events.hpp" 54#include "utilities/vmError.hpp" 55#ifdef COMPILER1 56#include "c1/c1_Runtime1.hpp" 57#endif 58#ifdef COMPILER2 59#include "opto/runtime.hpp" 60#endif 61 62 63# include <signal.h> // needed first to avoid name collision for "std" with SC 5.0 64 65// put OS-includes here 66# include <sys/types.h> 67# include <sys/mman.h> 68# include <pthread.h> 69# include <errno.h> 70# include <dlfcn.h> 71# include <stdio.h> 72# include <unistd.h> 73# include <sys/resource.h> 74# include <thread.h> 75# include <sys/stat.h> 76# include <sys/time.h> 77# include <sys/filio.h> 78# include <sys/utsname.h> 79# include <sys/systeminfo.h> 80# include <sys/socket.h> 81# include <sys/lwp.h> 82# include <pwd.h> 83# include <poll.h> 84# include <sys/lwp.h> 85 86# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 87# include <sys/procfs.h> // see comment in <sys/procfs.h> 88 89#define MAX_PATH (2 * K) 90 91// Minimum stack size for the VM. It's easier to document a constant 92// but it's different for x86 and sparc because the page sizes are different. 93#ifdef _LP64 94size_t os::Solaris::min_stack_allowed = 128*K; 95#else 96size_t os::Solaris::min_stack_allowed = 96*K; 97#endif 98 99int os::Solaris::max_register_window_saves_before_flushing() { 100 // We should detect this at run time. For now, filling 101 // in with a constant. 102 return 8; 103} 104 105static void handle_unflushed_register_windows(gwindows_t *win) { 106 int restore_count = win->wbcnt; 107 int i; 108 109 for(i=0; i<restore_count; i++) { 110 address sp = ((address)win->spbuf[i]) + STACK_BIAS; 111 address reg_win = (address)&win->wbuf[i]; 112 memcpy(sp,reg_win,sizeof(struct rwindow)); 113 } 114} 115 116char* os::non_memory_address_word() { 117 // Must never look like an address returned by reserve_memory, 118 // even in its subfields (as defined by the CPU immediate fields, 119 // if the CPU splits constants across multiple instructions). 120 // On SPARC, 0 != %hi(any real address), because there is no 121 // allocation in the first 1Kb of the virtual address space. 122 return (char*) 0; 123} 124 125// Validate a ucontext retrieved from walking a uc_link of a ucontext. 126// There are issues with libthread giving out uc_links for different threads 127// on the same uc_link chain and bad or circular links. 128// 129bool os::Solaris::valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect) { 130 if (valid >= suspect || 131 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags || 132 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp || 133 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) { 134 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");) 135 return false; 136 } 137 138 if (thread->is_Java_thread()) { 139 if (!valid_stack_address(thread, (address)suspect)) { 140 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");) 141 return false; 142 } 143 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 144 if (!valid_stack_address(thread, _sp) || 145 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) { 146 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");) 147 return false; 148 } 149 } 150 return true; 151} 152 153// We will only follow one level of uc_link since there are libthread 154// issues with ucontext linking and it is better to be safe and just 155// let caller retry later. 156ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread, 157 ucontext_t *uc) { 158 159 ucontext_t *retuc = NULL; 160 161 // Sometimes the topmost register windows are not properly flushed. 162 // i.e., if the kernel would have needed to take a page fault 163 if (uc != NULL && uc->uc_mcontext.gwins != NULL) { 164 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 165 } 166 167 if (uc != NULL) { 168 if (uc->uc_link == NULL) { 169 // cannot validate without uc_link so accept current ucontext 170 retuc = uc; 171 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { 172 // first ucontext is valid so try the next one 173 uc = uc->uc_link; 174 if (uc->uc_link == NULL) { 175 // cannot validate without uc_link so accept current ucontext 176 retuc = uc; 177 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { 178 // the ucontext one level down is also valid so return it 179 retuc = uc; 180 } 181 } 182 } 183 return retuc; 184} 185 186// Assumes ucontext is valid 187ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) { 188 address pc = (address)uc->uc_mcontext.gregs[REG_PC]; 189 // set npc to zero to avoid using it for safepoint, good for profiling only 190 return ExtendedPC(pc); 191} 192 193// Assumes ucontext is valid 194intptr_t* os::Solaris::ucontext_get_sp(ucontext_t *uc) { 195 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS); 196} 197 198// Solaris X86 only 199intptr_t* os::Solaris::ucontext_get_fp(ucontext_t *uc) { 200 ShouldNotReachHere(); 201 return NULL; 202} 203 204// For Forte Analyzer AsyncGetCallTrace profiling support - thread 205// is currently interrupted by SIGPROF. 206// 207// ret_fp parameter is only used by Solaris X86. 208// 209// The difference between this and os::fetch_frame_from_context() is that 210// here we try to skip nested signal frames. 211ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread, 212 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { 213 214 assert(thread != NULL, "just checking"); 215 assert(ret_sp != NULL, "just checking"); 216 assert(ret_fp == NULL, "just checking"); 217 218 ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc); 219 220 return os::fetch_frame_from_context(luc, ret_sp, ret_fp); 221} 222 223 224// ret_fp parameter is only used by Solaris X86. 225ExtendedPC os::fetch_frame_from_context(void* ucVoid, 226 intptr_t** ret_sp, intptr_t** ret_fp) { 227 228 ExtendedPC epc; 229 ucontext_t *uc = (ucontext_t*)ucVoid; 230 231 if (uc != NULL) { 232 epc = os::Solaris::ucontext_get_ExtendedPC(uc); 233 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc); 234 } else { 235 // construct empty ExtendedPC for return value checking 236 epc = ExtendedPC(NULL); 237 if (ret_sp) *ret_sp = (intptr_t *)NULL; 238 } 239 240 return epc; 241} 242 243frame os::fetch_frame_from_context(void* ucVoid) { 244 intptr_t* sp; 245 intptr_t* fp; 246 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); 247 return frame(sp, frame::unpatchable, epc.pc()); 248} 249 250frame os::get_sender_for_C_frame(frame* fr) { 251 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc()); 252} 253 254frame os::current_frame() { 255 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); 256 frame myframe(sp, frame::unpatchable, 257 CAST_FROM_FN_PTR(address, os::current_frame)); 258 if (os::is_first_C_frame(&myframe)) { 259 // stack is not walkable 260 return frame(NULL, NULL, NULL); 261 } else { 262 return os::get_sender_for_C_frame(&myframe); 263 } 264} 265 266 267void GetThreadPC_Callback::execute(OSThread::InterruptArguments *args) { 268 Thread* thread = args->thread(); 269 ucontext_t* uc = args->ucontext(); 270 intptr_t* sp; 271 272 assert(ProfileVM && thread->is_VM_thread(), "just checking"); 273 274 // Skip the mcontext corruption verification. If if occasionally 275 // things get corrupt, it is ok for profiling - we will just get an unresolved 276 // function name 277 ExtendedPC new_addr((address)uc->uc_mcontext.gregs[REG_PC]); 278 _addr = new_addr; 279} 280 281 282static int threadgetstate(thread_t tid, int *flags, lwpid_t *lwp, stack_t *ss, gregset_t rs, lwpstatus_t *lwpstatus) { 283 char lwpstatusfile[PROCFILE_LENGTH]; 284 int lwpfd, err; 285 286 if (err = os::Solaris::thr_getstate(tid, flags, lwp, ss, rs)) 287 return (err); 288 if (*flags == TRS_LWPID) { 289 sprintf(lwpstatusfile, "/proc/%d/lwp/%d/lwpstatus", getpid(), 290 *lwp); 291 if ((lwpfd = ::open(lwpstatusfile, O_RDONLY)) < 0) { 292 perror("thr_mutator_status: open lwpstatus"); 293 return (EINVAL); 294 } 295 if (pread(lwpfd, lwpstatus, sizeof (lwpstatus_t), (off_t)0) != 296 sizeof (lwpstatus_t)) { 297 perror("thr_mutator_status: read lwpstatus"); 298 (void) ::close(lwpfd); 299 return (EINVAL); 300 } 301 (void) ::close(lwpfd); 302 } 303 return (0); 304} 305 306 307bool os::is_allocatable(size_t bytes) { 308#ifdef _LP64 309 return true; 310#else 311 return (bytes <= (size_t)3835*M); 312#endif 313} 314 315extern "C" void Fetch32PFI () ; 316extern "C" void Fetch32Resume () ; 317extern "C" void FetchNPFI () ; 318extern "C" void FetchNResume () ; 319 320extern "C" JNIEXPORT int 321JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, 322 int abort_if_unrecognized) { 323 ucontext_t* uc = (ucontext_t*) ucVoid; 324 325 Thread* t = ThreadLocalStorage::get_thread_slow(); 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 if (PrintMiscellaneous && (WizardMode || Verbose)) { 334 char buf[64]; 335 warning("Ignoring %s - see 4229104 or 6499219", 336 os::exception_name(sig, buf, sizeof(buf))); 337 338 } 339 return true; 340 } 341 } 342 343 JavaThread* thread = NULL; 344 VMThread* vmthread = NULL; 345 if (os::Solaris::signal_handlers_are_installed) { 346 if (t != NULL ){ 347 if(t->is_Java_thread()) { 348 thread = (JavaThread*)t; 349 } 350 else if(t->is_VM_thread()){ 351 vmthread = (VMThread *)t; 352 } 353 } 354 } 355 356 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs"); 357 358 if (sig == os::Solaris::SIGasync()) { 359 if (thread) { 360 OSThread::InterruptArguments args(thread, uc); 361 thread->osthread()->do_interrupt_callbacks_at_interrupt(&args); 362 return true; 363 } else if (vmthread) { 364 OSThread::InterruptArguments args(vmthread, uc); 365 vmthread->osthread()->do_interrupt_callbacks_at_interrupt(&args); 366 return true; 367 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { 368 return true; 369 } else { 370 // If os::Solaris::SIGasync not chained, and this is a non-vm and 371 // non-java thread 372 return true; 373 } 374 } 375 376 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { 377 // can't decode this kind of signal 378 info = NULL; 379 } else { 380 assert(sig == info->si_signo, "bad siginfo"); 381 } 382 383 // decide if this trap can be handled by a stub 384 address stub = NULL; 385 386 address pc = NULL; 387 address npc = NULL; 388 389 //%note os_trap_1 390 if (info != NULL && uc != NULL && thread != NULL) { 391 // factor me: getPCfromContext 392 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 393 npc = (address) uc->uc_mcontext.gregs[REG_nPC]; 394 395 // SafeFetch() support 396 // Implemented with either a fixed set of addresses such 397 // as Fetch32*, or with Thread._OnTrap. 398 if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(Fetch32PFI)) { 399 uc->uc_mcontext.gregs [REG_PC] = intptr_t(Fetch32Resume) ; 400 uc->uc_mcontext.gregs [REG_nPC] = intptr_t(Fetch32Resume) + 4 ; 401 return true ; 402 } 403 if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(FetchNPFI)) { 404 uc->uc_mcontext.gregs [REG_PC] = intptr_t(FetchNResume) ; 405 uc->uc_mcontext.gregs [REG_nPC] = intptr_t(FetchNResume) + 4 ; 406 return true ; 407 } 408 409 // Handle ALL stack overflow variations here 410 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) { 411 address addr = (address) info->si_addr; 412 if (thread->in_stack_yellow_zone(addr)) { 413 thread->disable_stack_yellow_zone(); 414 // Sometimes the register windows are not properly flushed. 415 if(uc->uc_mcontext.gwins != NULL) { 416 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 417 } 418 if (thread->thread_state() == _thread_in_Java) { 419 // Throw a stack overflow exception. Guard pages will be reenabled 420 // while unwinding the stack. 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 return true; 425 } 426 } else if (thread->in_stack_red_zone(addr)) { 427 // Fatal red zone violation. Disable the guard pages and fall through 428 // to handle_unexpected_exception way down below. 429 thread->disable_stack_red_zone(); 430 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); 431 // Sometimes the register windows are not properly flushed. 432 if(uc->uc_mcontext.gwins != NULL) { 433 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 434 } 435 } 436 } 437 438 439 if (thread->thread_state() == _thread_in_vm) { 440 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) { 441 stub = StubRoutines::handler_for_unsafe_access(); 442 } 443 } 444 445 else if (thread->thread_state() == _thread_in_Java) { 446 // Java thread running in Java code => find exception handler if any 447 // a fault inside compiled code, the interpreter, or a stub 448 449 // Support Safepoint Polling 450 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) { 451 stub = SharedRuntime::get_poll_stub(pc); 452 } 453 454 // Not needed on x86 solaris because verify_oops doesn't generate 455 // SEGV/BUS like sparc does. 456 if ( (sig == SIGSEGV || sig == SIGBUS) 457 && pc >= MacroAssembler::_verify_oop_implicit_branch[0] 458 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) { 459 stub = MacroAssembler::_verify_oop_implicit_branch[2]; 460 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr); 461 } 462 463 // This is not factored because on x86 solaris the patching for 464 // zombies does not generate a SEGV. 465 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) { 466 // zombie method (ld [%g0],%o7 instruction) 467 stub = SharedRuntime::get_handle_wrong_method_stub(); 468 469 // At the stub it needs to look like a call from the caller of this 470 // method (not a call from the segv site). 471 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 472 } 473 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { 474 // BugId 4454115: A read from a MappedByteBuffer can fault 475 // here if the underlying file has been truncated. 476 // Do not crash the VM in such a case. 477 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 478 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL; 479 if (nm != NULL && nm->has_unsafe_access()) { 480 stub = StubRoutines::handler_for_unsafe_access(); 481 } 482 } 483 484 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) { 485 // integer divide by zero 486 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 487 } 488 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { 489 // floating-point divide by zero 490 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); 491 } 492#ifdef COMPILER2 493 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) { 494#ifdef ASSERT 495 #ifdef TIERED 496 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); 497 assert(cb->is_compiled_by_c2(), "Wrong compiler"); 498 #endif // TIERED 499#endif // ASSERT 500 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken. 501 stub = SharedRuntime::get_ic_miss_stub(); 502 // At the stub it needs to look like a call from the caller of this 503 // method (not a call from the segv site). 504 pc = (address)uc->uc_mcontext.gregs[REG_O7]; 505 } 506#endif // COMPILER2 507 508 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { 509 // Determination of interpreter/vtable stub/compiled code null exception 510 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 511 } 512 } 513 514 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in 515 // and the heap gets shrunk before the field access. 516 if ((sig == SIGSEGV) || (sig == SIGBUS)) { 517 address addr = JNI_FastGetField::find_slowcase_pc(pc); 518 if (addr != (address)-1) { 519 stub = addr; 520 } 521 } 522 523 // Check to see if we caught the safepoint code in the 524 // process of write protecting the memory serialization page. 525 // It write enables the page immediately after protecting it 526 // so just return. 527 if ((sig == SIGSEGV) && 528 os::is_memory_serialize_page(thread, (address)info->si_addr)) { 529 // Block current thread until the memory serialize page permission restored. 530 os::block_on_serialize_page_trap(); 531 return true; 532 } 533 } 534 535 if (stub != NULL) { 536 // save all thread context in case we need to restore it 537 538 thread->set_saved_exception_pc(pc); 539 thread->set_saved_exception_npc(npc); 540 541 // simulate a branch to the stub (a "call" in the safepoint stub case) 542 // factor me: setPC 543 uc->uc_mcontext.gregs[REG_PC ] = (greg_t)stub; 544 uc->uc_mcontext.gregs[REG_nPC] = (greg_t)(stub + 4); 545 546#ifndef PRODUCT 547 if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__); 548#endif /* PRODUCT */ 549 550 return true; 551 } 552 553 // signal-chaining 554 if (os::Solaris::chained_handler(sig, info, ucVoid)) { 555 return true; 556 } 557 558 if (!abort_if_unrecognized) { 559 // caller wants another chance, so give it to him 560 return false; 561 } 562 563 if (!os::Solaris::libjsig_is_loaded) { 564 struct sigaction oldAct; 565 sigaction(sig, (struct sigaction *)0, &oldAct); 566 if (oldAct.sa_sigaction != signalHandler) { 567 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 568 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 569 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand); 570 } 571 } 572 573 if (pc == NULL && uc != NULL) { 574 pc = (address) uc->uc_mcontext.gregs[REG_PC]; 575 } 576 577 // Sometimes the register windows are not properly flushed. 578 if(uc->uc_mcontext.gwins != NULL) { 579 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); 580 } 581 582 // unmask current signal 583 sigset_t newset; 584 sigemptyset(&newset); 585 sigaddset(&newset, sig); 586 sigprocmask(SIG_UNBLOCK, &newset, NULL); 587 588 // Determine which sort of error to throw. Out of swap may signal 589 // on the thread stack, which could get a mapping error when touched. 590 address addr = (address) info->si_addr; 591 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) { 592 vm_exit_out_of_memory(0, "Out of swap space to map in thread stack."); 593 } 594 595 VMError err(t, sig, pc, info, ucVoid); 596 err.report_and_die(); 597 598 ShouldNotReachHere(); 599} 600 601void os::print_context(outputStream *st, void *context) { 602 if (context == NULL) return; 603 604 ucontext_t *uc = (ucontext_t*)context; 605 st->print_cr("Registers:"); 606 607 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT 608 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT, 609 uc->uc_mcontext.gregs[REG_G1], 610 uc->uc_mcontext.gregs[REG_G2], 611 uc->uc_mcontext.gregs[REG_G3], 612 uc->uc_mcontext.gregs[REG_G4]); 613 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT 614 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT, 615 uc->uc_mcontext.gregs[REG_G5], 616 uc->uc_mcontext.gregs[REG_G6], 617 uc->uc_mcontext.gregs[REG_G7], 618 uc->uc_mcontext.gregs[REG_Y]); 619 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT 620 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT, 621 uc->uc_mcontext.gregs[REG_O0], 622 uc->uc_mcontext.gregs[REG_O1], 623 uc->uc_mcontext.gregs[REG_O2], 624 uc->uc_mcontext.gregs[REG_O3]); 625 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT 626 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT, 627 uc->uc_mcontext.gregs[REG_O4], 628 uc->uc_mcontext.gregs[REG_O5], 629 uc->uc_mcontext.gregs[REG_O6], 630 uc->uc_mcontext.gregs[REG_O7]); 631 632 633 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 634 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT 635 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT, 636 sp[L0->sp_offset_in_saved_window()], 637 sp[L1->sp_offset_in_saved_window()], 638 sp[L2->sp_offset_in_saved_window()], 639 sp[L3->sp_offset_in_saved_window()]); 640 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT 641 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT, 642 sp[L4->sp_offset_in_saved_window()], 643 sp[L5->sp_offset_in_saved_window()], 644 sp[L6->sp_offset_in_saved_window()], 645 sp[L7->sp_offset_in_saved_window()]); 646 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT 647 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT, 648 sp[I0->sp_offset_in_saved_window()], 649 sp[I1->sp_offset_in_saved_window()], 650 sp[I2->sp_offset_in_saved_window()], 651 sp[I3->sp_offset_in_saved_window()]); 652 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT 653 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT, 654 sp[I4->sp_offset_in_saved_window()], 655 sp[I5->sp_offset_in_saved_window()], 656 sp[I6->sp_offset_in_saved_window()], 657 sp[I7->sp_offset_in_saved_window()]); 658 659 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT, 660 uc->uc_mcontext.gregs[REG_PC], 661 uc->uc_mcontext.gregs[REG_nPC]); 662 st->cr(); 663 st->cr(); 664 665 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); 666 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); 667 st->cr(); 668 669 // Note: it may be unsafe to inspect memory near pc. For example, pc may 670 // point to garbage if entry point in an nmethod is corrupted. Leave 671 // this at the end, and hope for the best. 672 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); 673 address pc = epc.pc(); 674 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); 675 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); 676} 677 678void os::print_register_info(outputStream *st, void *context) { 679 if (context == NULL) return; 680 681 ucontext_t *uc = (ucontext_t*)context; 682 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); 683 684 st->print_cr("Register to memory mapping:"); 685 st->cr(); 686 687 // this is only for the "general purpose" registers 688 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]); 689 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]); 690 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]); 691 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]); 692 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]); 693 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]); 694 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]); 695 st->cr(); 696 697 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]); 698 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]); 699 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]); 700 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]); 701 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]); 702 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]); 703 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]); 704 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]); 705 st->cr(); 706 707 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]); 708 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]); 709 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]); 710 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]); 711 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]); 712 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]); 713 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]); 714 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]); 715 st->cr(); 716 717 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]); 718 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]); 719 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]); 720 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]); 721 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]); 722 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]); 723 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]); 724 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]); 725 st->cr(); 726} 727 728void os::Solaris::init_thread_fpu_state(void) { 729 // Nothing needed on Sparc. 730} 731 732#if !defined(COMPILER2) && !defined(_LP64) 733 734// These routines are the initial value of atomic_xchg_entry(), 735// atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry() 736// until initialization is complete. 737// TODO - remove when the VM drops support for V8. 738 739typedef jint xchg_func_t (jint, volatile jint*); 740typedef jint cmpxchg_func_t (jint, volatile jint*, jint); 741typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong); 742typedef jint add_func_t (jint, volatile jint*); 743 744jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { 745 // try to use the stub: 746 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); 747 748 if (func != NULL) { 749 os::atomic_xchg_func = func; 750 return (*func)(exchange_value, dest); 751 } 752 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 753 754 jint old_value = *dest; 755 *dest = exchange_value; 756 return old_value; 757} 758 759jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { 760 // try to use the stub: 761 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); 762 763 if (func != NULL) { 764 os::atomic_cmpxchg_func = func; 765 return (*func)(exchange_value, dest, compare_value); 766 } 767 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 768 769 jint old_value = *dest; 770 if (old_value == compare_value) 771 *dest = exchange_value; 772 return old_value; 773} 774 775jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { 776 // try to use the stub: 777 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); 778 779 if (func != NULL) { 780 os::atomic_cmpxchg_long_func = func; 781 return (*func)(exchange_value, dest, compare_value); 782 } 783 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 784 785 jlong old_value = *dest; 786 if (old_value == compare_value) 787 *dest = exchange_value; 788 return old_value; 789} 790 791jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { 792 // try to use the stub: 793 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); 794 795 if (func != NULL) { 796 os::atomic_add_func = func; 797 return (*func)(add_value, dest); 798 } 799 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 800 801 return (*dest) += add_value; 802} 803 804xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; 805cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; 806cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; 807add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; 808 809#endif // !_LP64 && !COMPILER2 810 811#if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE) 812 // See file build/solaris/makefiles/$compiler.make 813 // For compiler1 the architecture is v8 and frps isn't present in v8 814 extern "C" void _mark_fpu_nosave() { 815 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :); 816 } 817#endif //defined(__sparc) && defined(COMPILER2) 818