annotate src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp @ 23286:dd9cc155639c

Merge with jdk8u66-b17
author Gilles Duboscq <gilles.m.duboscq@oracle.com>
date Thu, 07 Jan 2016 17:28:46 +0100
parents e2e9c39b7818 f43fad8786fc
children
rev   line source
duke@0 1 /*
sla@10405 2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
trims@1552 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1552 20 * or visit www.oracle.com if you need additional information or have any
trims@1552 21 * questions.
duke@0 22 *
duke@0 23 */
duke@0 24
stefank@1972 25 // no precompiled headers
twisti@7204 26 #include "asm/macroAssembler.hpp"
stefan@20816 27 #include "macroAssembler_sparc.hpp"
stefank@1972 28 #include "classfile/classLoader.hpp"
stefank@1972 29 #include "classfile/systemDictionary.hpp"
stefank@1972 30 #include "classfile/vmSymbols.hpp"
stefank@1972 31 #include "code/icBuffer.hpp"
stefank@1972 32 #include "code/vtableStubs.hpp"
stefank@1972 33 #include "interpreter/interpreter.hpp"
stefank@1972 34 #include "jvm_solaris.h"
stefank@1972 35 #include "memory/allocation.inline.hpp"
stefank@1972 36 #include "mutex_solaris.inline.hpp"
stefank@1972 37 #include "nativeInst_sparc.hpp"
stefank@1972 38 #include "os_share_solaris.hpp"
stefank@1972 39 #include "prims/jniFastGetField.hpp"
stefank@1972 40 #include "prims/jvm.h"
stefank@1972 41 #include "prims/jvm_misc.hpp"
stefank@1972 42 #include "runtime/arguments.hpp"
stefank@1972 43 #include "runtime/extendedPC.hpp"
stefank@1972 44 #include "runtime/frame.inline.hpp"
stefank@1972 45 #include "runtime/interfaceSupport.hpp"
stefank@1972 46 #include "runtime/java.hpp"
stefank@1972 47 #include "runtime/javaCalls.hpp"
stefank@1972 48 #include "runtime/mutexLocker.hpp"
stefank@1972 49 #include "runtime/osThread.hpp"
stefank@1972 50 #include "runtime/sharedRuntime.hpp"
stefank@1972 51 #include "runtime/stubRoutines.hpp"
stefank@7180 52 #include "runtime/thread.inline.hpp"
stefank@1972 53 #include "runtime/timer.hpp"
stefank@1972 54 #include "utilities/events.hpp"
stefank@1972 55 #include "utilities/vmError.hpp"
duke@0 56
duke@0 57 # include <signal.h> // needed first to avoid name collision for "std" with SC 5.0
duke@0 58
duke@0 59 // put OS-includes here
duke@0 60 # include <sys/types.h>
duke@0 61 # include <sys/mman.h>
duke@0 62 # include <pthread.h>
duke@0 63 # include <errno.h>
duke@0 64 # include <dlfcn.h>
duke@0 65 # include <stdio.h>
duke@0 66 # include <unistd.h>
duke@0 67 # include <sys/resource.h>
duke@0 68 # include <thread.h>
duke@0 69 # include <sys/stat.h>
duke@0 70 # include <sys/time.h>
duke@0 71 # include <sys/filio.h>
duke@0 72 # include <sys/utsname.h>
duke@0 73 # include <sys/systeminfo.h>
duke@0 74 # include <sys/socket.h>
duke@0 75 # include <sys/lwp.h>
duke@0 76 # include <pwd.h>
duke@0 77 # include <poll.h>
duke@0 78 # include <sys/lwp.h>
duke@0 79
duke@0 80 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
duke@0 81 # include <sys/procfs.h> // see comment in <sys/procfs.h>
duke@0 82
duke@0 83 #define MAX_PATH (2 * K)
duke@0 84
duke@0 85 // Minimum stack size for the VM. It's easier to document a constant
duke@0 86 // but it's different for x86 and sparc because the page sizes are different.
duke@0 87 #ifdef _LP64
duke@0 88 size_t os::Solaris::min_stack_allowed = 128*K;
duke@0 89 #else
duke@0 90 size_t os::Solaris::min_stack_allowed = 96*K;
duke@0 91 #endif
duke@0 92
duke@0 93 int os::Solaris::max_register_window_saves_before_flushing() {
duke@0 94 // We should detect this at run time. For now, filling
duke@0 95 // in with a constant.
duke@0 96 return 8;
duke@0 97 }
duke@0 98
duke@0 99 static void handle_unflushed_register_windows(gwindows_t *win) {
duke@0 100 int restore_count = win->wbcnt;
duke@0 101 int i;
duke@0 102
duke@0 103 for(i=0; i<restore_count; i++) {
duke@0 104 address sp = ((address)win->spbuf[i]) + STACK_BIAS;
duke@0 105 address reg_win = (address)&win->wbuf[i];
duke@0 106 memcpy(sp,reg_win,sizeof(struct rwindow));
duke@0 107 }
duke@0 108 }
duke@0 109
duke@0 110 char* os::non_memory_address_word() {
duke@0 111 // Must never look like an address returned by reserve_memory,
duke@0 112 // even in its subfields (as defined by the CPU immediate fields,
duke@0 113 // if the CPU splits constants across multiple instructions).
duke@0 114 // On SPARC, 0 != %hi(any real address), because there is no
duke@0 115 // allocation in the first 1Kb of the virtual address space.
duke@0 116 return (char*) 0;
duke@0 117 }
duke@0 118
duke@0 119 // Validate a ucontext retrieved from walking a uc_link of a ucontext.
duke@0 120 // There are issues with libthread giving out uc_links for different threads
duke@0 121 // on the same uc_link chain and bad or circular links.
duke@0 122 //
duke@0 123 bool os::Solaris::valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect) {
duke@0 124 if (valid >= suspect ||
duke@0 125 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags ||
duke@0 126 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp ||
duke@0 127 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) {
duke@0 128 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");)
duke@0 129 return false;
duke@0 130 }
duke@0 131
duke@0 132 if (thread->is_Java_thread()) {
duke@0 133 if (!valid_stack_address(thread, (address)suspect)) {
duke@0 134 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");)
duke@0 135 return false;
duke@0 136 }
duke@0 137 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
duke@0 138 if (!valid_stack_address(thread, _sp) ||
duke@0 139 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) {
duke@0 140 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");)
duke@0 141 return false;
duke@0 142 }
duke@0 143 }
duke@0 144 return true;
duke@0 145 }
duke@0 146
duke@0 147 // We will only follow one level of uc_link since there are libthread
duke@0 148 // issues with ucontext linking and it is better to be safe and just
duke@0 149 // let caller retry later.
duke@0 150 ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread,
duke@0 151 ucontext_t *uc) {
duke@0 152
duke@0 153 ucontext_t *retuc = NULL;
duke@0 154
duke@0 155 // Sometimes the topmost register windows are not properly flushed.
duke@0 156 // i.e., if the kernel would have needed to take a page fault
duke@0 157 if (uc != NULL && uc->uc_mcontext.gwins != NULL) {
duke@0 158 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
duke@0 159 }
duke@0 160
duke@0 161 if (uc != NULL) {
duke@0 162 if (uc->uc_link == NULL) {
duke@0 163 // cannot validate without uc_link so accept current ucontext
duke@0 164 retuc = uc;
duke@0 165 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
duke@0 166 // first ucontext is valid so try the next one
duke@0 167 uc = uc->uc_link;
duke@0 168 if (uc->uc_link == NULL) {
duke@0 169 // cannot validate without uc_link so accept current ucontext
duke@0 170 retuc = uc;
duke@0 171 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
duke@0 172 // the ucontext one level down is also valid so return it
duke@0 173 retuc = uc;
duke@0 174 }
duke@0 175 }
duke@0 176 }
duke@0 177 return retuc;
duke@0 178 }
duke@0 179
duke@0 180 // Assumes ucontext is valid
duke@0 181 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) {
duke@0 182 address pc = (address)uc->uc_mcontext.gregs[REG_PC];
duke@0 183 // set npc to zero to avoid using it for safepoint, good for profiling only
duke@0 184 return ExtendedPC(pc);
duke@0 185 }
duke@0 186
duke@0 187 // Assumes ucontext is valid
duke@0 188 intptr_t* os::Solaris::ucontext_get_sp(ucontext_t *uc) {
duke@0 189 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
duke@0 190 }
duke@0 191
duke@0 192 // Solaris X86 only
duke@0 193 intptr_t* os::Solaris::ucontext_get_fp(ucontext_t *uc) {
duke@0 194 ShouldNotReachHere();
duke@0 195 return NULL;
duke@0 196 }
duke@0 197
sla@10405 198 address os::Solaris::ucontext_get_pc(ucontext_t *uc) {
sla@10405 199 return (address) uc->uc_mcontext.gregs[REG_PC];
sla@10405 200 }
sla@10405 201
sla@10405 202
duke@0 203 // For Forte Analyzer AsyncGetCallTrace profiling support - thread
duke@0 204 // is currently interrupted by SIGPROF.
duke@0 205 //
duke@0 206 // ret_fp parameter is only used by Solaris X86.
duke@0 207 //
duke@0 208 // The difference between this and os::fetch_frame_from_context() is that
duke@0 209 // here we try to skip nested signal frames.
duke@0 210 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread,
duke@0 211 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) {
duke@0 212
duke@0 213 assert(thread != NULL, "just checking");
duke@0 214 assert(ret_sp != NULL, "just checking");
duke@0 215 assert(ret_fp == NULL, "just checking");
duke@0 216
duke@0 217 ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc);
duke@0 218
duke@0 219 return os::fetch_frame_from_context(luc, ret_sp, ret_fp);
duke@0 220 }
duke@0 221
duke@0 222
duke@0 223 // ret_fp parameter is only used by Solaris X86.
duke@0 224 ExtendedPC os::fetch_frame_from_context(void* ucVoid,
duke@0 225 intptr_t** ret_sp, intptr_t** ret_fp) {
duke@0 226
duke@0 227 ExtendedPC epc;
duke@0 228 ucontext_t *uc = (ucontext_t*)ucVoid;
duke@0 229
duke@0 230 if (uc != NULL) {
duke@0 231 epc = os::Solaris::ucontext_get_ExtendedPC(uc);
duke@0 232 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc);
duke@0 233 } else {
duke@0 234 // construct empty ExtendedPC for return value checking
duke@0 235 epc = ExtendedPC(NULL);
duke@0 236 if (ret_sp) *ret_sp = (intptr_t *)NULL;
duke@0 237 }
duke@0 238
duke@0 239 return epc;
duke@0 240 }
duke@0 241
duke@0 242 frame os::fetch_frame_from_context(void* ucVoid) {
duke@0 243 intptr_t* sp;
duke@0 244 intptr_t* fp;
duke@0 245 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
duke@0 246 return frame(sp, frame::unpatchable, epc.pc());
duke@0 247 }
duke@0 248
duke@0 249 frame os::get_sender_for_C_frame(frame* fr) {
duke@0 250 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc());
duke@0 251 }
duke@0 252
roland@5903 253 // Returns an estimate of the current stack pointer. Result must be guaranteed to
roland@5903 254 // point into the calling threads stack, and be no lower than the current stack
roland@5903 255 // pointer.
roland@5903 256 address os::current_stack_pointer() {
roland@5903 257 volatile int dummy;
roland@5903 258 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right
roland@5903 259 return sp;
roland@5903 260 }
roland@5903 261
duke@0 262 frame os::current_frame() {
duke@0 263 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()();
duke@0 264 frame myframe(sp, frame::unpatchable,
duke@0 265 CAST_FROM_FN_PTR(address, os::current_frame));
duke@0 266 if (os::is_first_C_frame(&myframe)) {
duke@0 267 // stack is not walkable
simonis@22803 268 return frame(NULL, NULL, false);
duke@0 269 } else {
duke@0 270 return os::get_sender_for_C_frame(&myframe);
duke@0 271 }
duke@0 272 }
duke@0 273
duke@0 274 static int threadgetstate(thread_t tid, int *flags, lwpid_t *lwp, stack_t *ss, gregset_t rs, lwpstatus_t *lwpstatus) {
duke@0 275 char lwpstatusfile[PROCFILE_LENGTH];
duke@0 276 int lwpfd, err;
duke@0 277
duke@0 278 if (err = os::Solaris::thr_getstate(tid, flags, lwp, ss, rs))
duke@0 279 return (err);
duke@0 280 if (*flags == TRS_LWPID) {
duke@0 281 sprintf(lwpstatusfile, "/proc/%d/lwp/%d/lwpstatus", getpid(),
duke@0 282 *lwp);
ikrylov@1980 283 if ((lwpfd = ::open(lwpstatusfile, O_RDONLY)) < 0) {
duke@0 284 perror("thr_mutator_status: open lwpstatus");
duke@0 285 return (EINVAL);
duke@0 286 }
duke@0 287 if (pread(lwpfd, lwpstatus, sizeof (lwpstatus_t), (off_t)0) !=
duke@0 288 sizeof (lwpstatus_t)) {
duke@0 289 perror("thr_mutator_status: read lwpstatus");
ikrylov@1980 290 (void) ::close(lwpfd);
duke@0 291 return (EINVAL);
duke@0 292 }
ikrylov@1980 293 (void) ::close(lwpfd);
duke@0 294 }
duke@0 295 return (0);
duke@0 296 }
duke@0 297
duke@0 298
duke@0 299 bool os::is_allocatable(size_t bytes) {
duke@0 300 #ifdef _LP64
duke@0 301 return true;
duke@0 302 #else
duke@0 303 return (bytes <= (size_t)3835*M);
duke@0 304 #endif
duke@0 305 }
duke@0 306
coleenp@2191 307 extern "C" JNIEXPORT int
coleenp@2191 308 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid,
coleenp@2191 309 int abort_if_unrecognized) {
duke@0 310 ucontext_t* uc = (ucontext_t*) ucVoid;
duke@0 311
duke@0 312 Thread* t = ThreadLocalStorage::get_thread_slow();
duke@0 313
rbackman@11151 314 // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away
rbackman@11151 315 // (no destructors can be run)
rbackman@11151 316 os::WatcherThreadCrashProtection::check_crash_protection(sig, t);
rbackman@11151 317
duke@0 318 SignalHandlerMark shm(t);
duke@0 319
duke@0 320 if(sig == SIGPIPE || sig == SIGXFSZ) {
duke@0 321 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
duke@0 322 return true;
duke@0 323 } else {
duke@0 324 if (PrintMiscellaneous && (WizardMode || Verbose)) {
duke@0 325 char buf[64];
duke@0 326 warning("Ignoring %s - see 4229104 or 6499219",
duke@0 327 os::exception_name(sig, buf, sizeof(buf)));
duke@0 328
duke@0 329 }
duke@0 330 return true;
duke@0 331 }
duke@0 332 }
duke@0 333
duke@0 334 JavaThread* thread = NULL;
duke@0 335 VMThread* vmthread = NULL;
duke@0 336 if (os::Solaris::signal_handlers_are_installed) {
duke@0 337 if (t != NULL ){
duke@0 338 if(t->is_Java_thread()) {
duke@0 339 thread = (JavaThread*)t;
duke@0 340 }
duke@0 341 else if(t->is_VM_thread()){
duke@0 342 vmthread = (VMThread *)t;
duke@0 343 }
duke@0 344 }
duke@0 345 }
duke@0 346
duke@0 347 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs");
duke@0 348
duke@0 349 if (sig == os::Solaris::SIGasync()) {
sla@10405 350 if (thread || vmthread) {
sla@10405 351 OSThread::SR_handler(t, uc);
duke@0 352 return true;
duke@0 353 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) {
duke@0 354 return true;
duke@0 355 } else {
duke@0 356 // If os::Solaris::SIGasync not chained, and this is a non-vm and
duke@0 357 // non-java thread
duke@0 358 return true;
duke@0 359 }
duke@0 360 }
duke@0 361
duke@0 362 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) {
duke@0 363 // can't decode this kind of signal
duke@0 364 info = NULL;
duke@0 365 } else {
duke@0 366 assert(sig == info->si_signo, "bad siginfo");
duke@0 367 }
duke@0 368
duke@0 369 // decide if this trap can be handled by a stub
duke@0 370 address stub = NULL;
duke@0 371
duke@0 372 address pc = NULL;
duke@0 373 address npc = NULL;
duke@0 374
duke@0 375 //%note os_trap_1
duke@0 376 if (info != NULL && uc != NULL && thread != NULL) {
duke@0 377 // factor me: getPCfromContext
duke@0 378 pc = (address) uc->uc_mcontext.gregs[REG_PC];
duke@0 379 npc = (address) uc->uc_mcontext.gregs[REG_nPC];
duke@0 380
duke@0 381 // SafeFetch() support
goetz@11127 382 if (StubRoutines::is_safefetch_fault(pc)) {
goetz@11127 383 uc->uc_mcontext.gregs[REG_PC] = intptr_t(StubRoutines::continuation_for_safefetch_fault(pc));
goetz@11127 384 uc->uc_mcontext.gregs[REG_nPC] = uc->uc_mcontext.gregs[REG_PC] + 4;
goetz@11127 385 return 1;
duke@0 386 }
duke@0 387
duke@0 388 // Handle ALL stack overflow variations here
duke@0 389 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) {
duke@0 390 address addr = (address) info->si_addr;
duke@0 391 if (thread->in_stack_yellow_zone(addr)) {
duke@0 392 thread->disable_stack_yellow_zone();
duke@0 393 // Sometimes the register windows are not properly flushed.
duke@0 394 if(uc->uc_mcontext.gwins != NULL) {
duke@0 395 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
duke@0 396 }
duke@0 397 if (thread->thread_state() == _thread_in_Java) {
duke@0 398 // Throw a stack overflow exception. Guard pages will be reenabled
duke@0 399 // while unwinding the stack.
duke@0 400 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
duke@0 401 } else {
duke@0 402 // Thread was in the vm or native code. Return and try to finish.
duke@0 403 return true;
duke@0 404 }
duke@0 405 } else if (thread->in_stack_red_zone(addr)) {
duke@0 406 // Fatal red zone violation. Disable the guard pages and fall through
duke@0 407 // to handle_unexpected_exception way down below.
duke@0 408 thread->disable_stack_red_zone();
duke@0 409 tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
duke@0 410 // Sometimes the register windows are not properly flushed.
duke@0 411 if(uc->uc_mcontext.gwins != NULL) {
duke@0 412 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
duke@0 413 }
duke@0 414 }
duke@0 415 }
duke@0 416
duke@0 417
duke@0 418 if (thread->thread_state() == _thread_in_vm) {
duke@0 419 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) {
duke@0 420 stub = StubRoutines::handler_for_unsafe_access();
duke@0 421 }
duke@0 422 }
duke@0 423
duke@0 424 else if (thread->thread_state() == _thread_in_Java) {
duke@0 425 // Java thread running in Java code => find exception handler if any
duke@0 426 // a fault inside compiled code, the interpreter, or a stub
duke@0 427
duke@0 428 // Support Safepoint Polling
duke@0 429 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) {
duke@0 430 stub = SharedRuntime::get_poll_stub(pc);
duke@0 431 }
duke@0 432
duke@0 433 // Not needed on x86 solaris because verify_oops doesn't generate
duke@0 434 // SEGV/BUS like sparc does.
duke@0 435 if ( (sig == SIGSEGV || sig == SIGBUS)
duke@0 436 && pc >= MacroAssembler::_verify_oop_implicit_branch[0]
duke@0 437 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) {
duke@0 438 stub = MacroAssembler::_verify_oop_implicit_branch[2];
duke@0 439 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr);
duke@0 440 }
duke@0 441
duke@0 442 // This is not factored because on x86 solaris the patching for
duke@0 443 // zombies does not generate a SEGV.
duke@0 444 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) {
duke@0 445 // zombie method (ld [%g0],%o7 instruction)
duke@0 446 stub = SharedRuntime::get_handle_wrong_method_stub();
duke@0 447
duke@0 448 // At the stub it needs to look like a call from the caller of this
duke@0 449 // method (not a call from the segv site).
duke@0 450 pc = (address)uc->uc_mcontext.gregs[REG_O7];
duke@0 451 }
duke@0 452 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) {
duke@0 453 // BugId 4454115: A read from a MappedByteBuffer can fault
duke@0 454 // here if the underlying file has been truncated.
duke@0 455 // Do not crash the VM in such a case.
duke@0 456 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
duke@0 457 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL;
duke@0 458 if (nm != NULL && nm->has_unsafe_access()) {
duke@0 459 stub = StubRoutines::handler_for_unsafe_access();
duke@0 460 }
duke@0 461 }
duke@0 462
duke@0 463 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) {
duke@0 464 // integer divide by zero
duke@0 465 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
duke@0 466 }
duke@0 467 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) {
duke@0 468 // floating-point divide by zero
duke@0 469 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
duke@0 470 }
duke@0 471 #ifdef COMPILER2
duke@0 472 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) {
duke@0 473 #ifdef ASSERT
duke@0 474 #ifdef TIERED
duke@0 475 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
duke@0 476 assert(cb->is_compiled_by_c2(), "Wrong compiler");
duke@0 477 #endif // TIERED
duke@0 478 #endif // ASSERT
duke@0 479 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken.
duke@0 480 stub = SharedRuntime::get_ic_miss_stub();
duke@0 481 // At the stub it needs to look like a call from the caller of this
duke@0 482 // method (not a call from the segv site).
duke@0 483 pc = (address)uc->uc_mcontext.gregs[REG_O7];
duke@0 484 }
duke@0 485 #endif // COMPILER2
duke@0 486
duke@0 487 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) {
duke@0 488 // Determination of interpreter/vtable stub/compiled code null exception
duke@0 489 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
duke@0 490 }
duke@0 491 }
duke@0 492
duke@0 493 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in
duke@0 494 // and the heap gets shrunk before the field access.
duke@0 495 if ((sig == SIGSEGV) || (sig == SIGBUS)) {
duke@0 496 address addr = JNI_FastGetField::find_slowcase_pc(pc);
duke@0 497 if (addr != (address)-1) {
duke@0 498 stub = addr;
duke@0 499 }
duke@0 500 }
duke@0 501
duke@0 502 // Check to see if we caught the safepoint code in the
duke@0 503 // process of write protecting the memory serialization page.
duke@0 504 // It write enables the page immediately after protecting it
duke@0 505 // so just return.
duke@0 506 if ((sig == SIGSEGV) &&
duke@0 507 os::is_memory_serialize_page(thread, (address)info->si_addr)) {
duke@0 508 // Block current thread until the memory serialize page permission restored.
duke@0 509 os::block_on_serialize_page_trap();
duke@0 510 return true;
duke@0 511 }
duke@0 512 }
duke@0 513
duke@0 514 if (stub != NULL) {
duke@0 515 // save all thread context in case we need to restore it
duke@0 516
duke@0 517 thread->set_saved_exception_pc(pc);
duke@0 518 thread->set_saved_exception_npc(npc);
duke@0 519
duke@0 520 // simulate a branch to the stub (a "call" in the safepoint stub case)
duke@0 521 // factor me: setPC
duke@0 522 uc->uc_mcontext.gregs[REG_PC ] = (greg_t)stub;
duke@0 523 uc->uc_mcontext.gregs[REG_nPC] = (greg_t)(stub + 4);
duke@0 524
duke@0 525 #ifndef PRODUCT
duke@0 526 if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__);
duke@0 527 #endif /* PRODUCT */
duke@0 528
duke@0 529 return true;
duke@0 530 }
duke@0 531
duke@0 532 // signal-chaining
duke@0 533 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
duke@0 534 return true;
duke@0 535 }
duke@0 536
duke@0 537 if (!abort_if_unrecognized) {
duke@0 538 // caller wants another chance, so give it to him
duke@0 539 return false;
duke@0 540 }
duke@0 541
duke@0 542 if (!os::Solaris::libjsig_is_loaded) {
duke@0 543 struct sigaction oldAct;
duke@0 544 sigaction(sig, (struct sigaction *)0, &oldAct);
duke@0 545 if (oldAct.sa_sigaction != signalHandler) {
duke@0 546 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
duke@0 547 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
twisti@605 548 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand);
duke@0 549 }
duke@0 550 }
duke@0 551
duke@0 552 if (pc == NULL && uc != NULL) {
duke@0 553 pc = (address) uc->uc_mcontext.gregs[REG_PC];
duke@0 554 }
duke@0 555
never@1907 556 // Sometimes the register windows are not properly flushed.
never@1907 557 if(uc->uc_mcontext.gwins != NULL) {
never@1907 558 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
never@1907 559 }
never@1907 560
duke@0 561 // unmask current signal
duke@0 562 sigset_t newset;
duke@0 563 sigemptyset(&newset);
duke@0 564 sigaddset(&newset, sig);
duke@0 565 sigprocmask(SIG_UNBLOCK, &newset, NULL);
duke@0 566
coleenp@2095 567 // Determine which sort of error to throw. Out of swap may signal
coleenp@2095 568 // on the thread stack, which could get a mapping error when touched.
coleenp@2095 569 address addr = (address) info->si_addr;
coleenp@2095 570 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) {
ccheung@10161 571 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack.");
coleenp@2095 572 }
coleenp@2095 573
duke@0 574 VMError err(t, sig, pc, info, ucVoid);
duke@0 575 err.report_and_die();
duke@0 576
duke@0 577 ShouldNotReachHere();
duke@0 578 }
duke@0 579
duke@0 580 void os::print_context(outputStream *st, void *context) {
duke@0 581 if (context == NULL) return;
duke@0 582
duke@0 583 ucontext_t *uc = (ucontext_t*)context;
duke@0 584 st->print_cr("Registers:");
duke@0 585
never@1907 586 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT
never@1907 587 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT,
never@1907 588 uc->uc_mcontext.gregs[REG_G1],
never@1907 589 uc->uc_mcontext.gregs[REG_G2],
never@1907 590 uc->uc_mcontext.gregs[REG_G3],
never@1907 591 uc->uc_mcontext.gregs[REG_G4]);
never@1907 592 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT
never@1907 593 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT,
never@1907 594 uc->uc_mcontext.gregs[REG_G5],
never@1907 595 uc->uc_mcontext.gregs[REG_G6],
never@1907 596 uc->uc_mcontext.gregs[REG_G7],
never@1907 597 uc->uc_mcontext.gregs[REG_Y]);
duke@0 598 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT
duke@0 599 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT,
duke@0 600 uc->uc_mcontext.gregs[REG_O0],
duke@0 601 uc->uc_mcontext.gregs[REG_O1],
duke@0 602 uc->uc_mcontext.gregs[REG_O2],
duke@0 603 uc->uc_mcontext.gregs[REG_O3]);
duke@0 604 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT
duke@0 605 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT,
duke@0 606 uc->uc_mcontext.gregs[REG_O4],
duke@0 607 uc->uc_mcontext.gregs[REG_O5],
duke@0 608 uc->uc_mcontext.gregs[REG_O6],
duke@0 609 uc->uc_mcontext.gregs[REG_O7]);
duke@0 610
never@1907 611
never@1907 612 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
never@1907 613 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT
never@1907 614 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT,
never@1907 615 sp[L0->sp_offset_in_saved_window()],
never@1907 616 sp[L1->sp_offset_in_saved_window()],
never@1907 617 sp[L2->sp_offset_in_saved_window()],
never@1907 618 sp[L3->sp_offset_in_saved_window()]);
never@1907 619 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT
never@1907 620 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT,
never@1907 621 sp[L4->sp_offset_in_saved_window()],
never@1907 622 sp[L5->sp_offset_in_saved_window()],
never@1907 623 sp[L6->sp_offset_in_saved_window()],
never@1907 624 sp[L7->sp_offset_in_saved_window()]);
never@1907 625 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT
never@1907 626 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT,
never@1907 627 sp[I0->sp_offset_in_saved_window()],
never@1907 628 sp[I1->sp_offset_in_saved_window()],
never@1907 629 sp[I2->sp_offset_in_saved_window()],
never@1907 630 sp[I3->sp_offset_in_saved_window()]);
never@1907 631 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT
never@1907 632 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT,
never@1907 633 sp[I4->sp_offset_in_saved_window()],
never@1907 634 sp[I5->sp_offset_in_saved_window()],
never@1907 635 sp[I6->sp_offset_in_saved_window()],
never@1907 636 sp[I7->sp_offset_in_saved_window()]);
duke@0 637
duke@0 638 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT,
duke@0 639 uc->uc_mcontext.gregs[REG_PC],
duke@0 640 uc->uc_mcontext.gregs[REG_nPC]);
bobv@1681 641 st->cr();
bobv@1681 642 st->cr();
bobv@1681 643
duke@0 644 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
duke@0 645 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t));
duke@0 646 st->cr();
duke@0 647
duke@0 648 // Note: it may be unsafe to inspect memory near pc. For example, pc may
duke@0 649 // point to garbage if entry point in an nmethod is corrupted. Leave
duke@0 650 // this at the end, and hope for the best.
duke@0 651 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc);
duke@0 652 address pc = epc.pc();
duke@0 653 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
never@1907 654 print_hex_dump(st, pc - 32, pc + 32, sizeof(char));
never@1907 655 }
never@1907 656
never@1907 657 void os::print_register_info(outputStream *st, void *context) {
never@1907 658 if (context == NULL) return;
never@1907 659
never@1907 660 ucontext_t *uc = (ucontext_t*)context;
never@1907 661 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
never@1907 662
never@1907 663 st->print_cr("Register to memory mapping:");
never@1907 664 st->cr();
never@1907 665
never@1907 666 // this is only for the "general purpose" registers
never@1907 667 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]);
never@1907 668 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]);
never@1907 669 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]);
never@1907 670 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]);
never@1907 671 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]);
never@1907 672 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]);
never@1907 673 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]);
never@1907 674 st->cr();
never@1907 675
never@1907 676 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]);
never@1907 677 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]);
never@1907 678 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]);
never@1907 679 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]);
never@1907 680 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]);
never@1907 681 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]);
never@1907 682 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]);
never@1907 683 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]);
never@1907 684 st->cr();
never@1907 685
never@1907 686 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]);
never@1907 687 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]);
never@1907 688 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]);
never@1907 689 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]);
never@1907 690 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]);
never@1907 691 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]);
never@1907 692 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]);
never@1907 693 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]);
never@1907 694 st->cr();
never@1907 695
never@1907 696 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]);
never@1907 697 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]);
never@1907 698 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]);
never@1907 699 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]);
never@1907 700 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]);
never@1907 701 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]);
never@1907 702 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]);
never@1907 703 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]);
never@1907 704 st->cr();
duke@0 705 }
duke@0 706
duke@0 707 void os::Solaris::init_thread_fpu_state(void) {
duke@0 708 // Nothing needed on Sparc.
duke@0 709 }
duke@0 710
duke@0 711 #if !defined(COMPILER2) && !defined(_LP64)
duke@0 712
duke@0 713 // These routines are the initial value of atomic_xchg_entry(),
duke@0 714 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry()
duke@0 715 // until initialization is complete.
duke@0 716 // TODO - remove when the VM drops support for V8.
duke@0 717
duke@0 718 typedef jint xchg_func_t (jint, volatile jint*);
duke@0 719 typedef jint cmpxchg_func_t (jint, volatile jint*, jint);
duke@0 720 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong);
duke@0 721 typedef jint add_func_t (jint, volatile jint*);
duke@0 722
duke@0 723 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) {
duke@0 724 // try to use the stub:
duke@0 725 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry());
duke@0 726
duke@0 727 if (func != NULL) {
duke@0 728 os::atomic_xchg_func = func;
duke@0 729 return (*func)(exchange_value, dest);
duke@0 730 }
duke@0 731 assert(Threads::number_of_threads() == 0, "for bootstrap only");
duke@0 732
duke@0 733 jint old_value = *dest;
duke@0 734 *dest = exchange_value;
duke@0 735 return old_value;
duke@0 736 }
duke@0 737
duke@0 738 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) {
duke@0 739 // try to use the stub:
duke@0 740 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry());
duke@0 741
duke@0 742 if (func != NULL) {
duke@0 743 os::atomic_cmpxchg_func = func;
duke@0 744 return (*func)(exchange_value, dest, compare_value);
duke@0 745 }
duke@0 746 assert(Threads::number_of_threads() == 0, "for bootstrap only");
duke@0 747
duke@0 748 jint old_value = *dest;
duke@0 749 if (old_value == compare_value)
duke@0 750 *dest = exchange_value;
duke@0 751 return old_value;
duke@0 752 }
duke@0 753
duke@0 754 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
duke@0 755 // try to use the stub:
duke@0 756 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry());
duke@0 757
duke@0 758 if (func != NULL) {
duke@0 759 os::atomic_cmpxchg_long_func = func;
duke@0 760 return (*func)(exchange_value, dest, compare_value);
duke@0 761 }
duke@0 762 assert(Threads::number_of_threads() == 0, "for bootstrap only");
duke@0 763
duke@0 764 jlong old_value = *dest;
duke@0 765 if (old_value == compare_value)
duke@0 766 *dest = exchange_value;
duke@0 767 return old_value;
duke@0 768 }
duke@0 769
duke@0 770 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) {
duke@0 771 // try to use the stub:
duke@0 772 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry());
duke@0 773
duke@0 774 if (func != NULL) {
duke@0 775 os::atomic_add_func = func;
duke@0 776 return (*func)(add_value, dest);
duke@0 777 }
duke@0 778 assert(Threads::number_of_threads() == 0, "for bootstrap only");
duke@0 779
duke@0 780 return (*dest) += add_value;
duke@0 781 }
duke@0 782
duke@0 783 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap;
duke@0 784 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap;
duke@0 785 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap;
duke@0 786 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap;
duke@0 787
duke@0 788 #endif // !_LP64 && !COMPILER2
duke@0 789
duke@0 790 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE)
duke@0 791 // See file build/solaris/makefiles/$compiler.make
duke@0 792 // For compiler1 the architecture is v8 and frps isn't present in v8
duke@0 793 extern "C" void _mark_fpu_nosave() {
duke@0 794 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :);
duke@0 795 }
duke@0 796 #endif //defined(__sparc) && defined(COMPILER2)
roland@5903 797
roland@5903 798 #ifndef PRODUCT
roland@5903 799 void os::verify_stack_alignment() {
roland@5903 800 }
roland@5903 801 #endif