Mercurial > hg > graal-compiler
annotate src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp @ 10405:f2110083203d
8005849: JEP 167: Event-Based JVM Tracing
Reviewed-by: acorn, coleenp, sla
Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>
| author | sla |
|---|---|
| date | Mon, 10 Jun 2013 11:30:51 +0200 |
| parents | 746b070f5022 |
| children | 980532a806a5 5e3b6f79d280 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 10405 | 2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 // no precompiled headers |
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26 #include "asm/macroAssembler.hpp" |
| 1972 | 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" | |
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51 #include "runtime/thread.inline.hpp" |
| 1972 | 52 #include "runtime/timer.hpp" |
| 53 #include "utilities/events.hpp" | |
| 54 #include "utilities/vmError.hpp" | |
| 0 | 55 |
| 56 # include <signal.h> // needed first to avoid name collision for "std" with SC 5.0 | |
| 57 | |
| 58 // put OS-includes here | |
| 59 # include <sys/types.h> | |
| 60 # include <sys/mman.h> | |
| 61 # include <pthread.h> | |
| 62 # include <errno.h> | |
| 63 # include <dlfcn.h> | |
| 64 # include <stdio.h> | |
| 65 # include <unistd.h> | |
| 66 # include <sys/resource.h> | |
| 67 # include <thread.h> | |
| 68 # include <sys/stat.h> | |
| 69 # include <sys/time.h> | |
| 70 # include <sys/filio.h> | |
| 71 # include <sys/utsname.h> | |
| 72 # include <sys/systeminfo.h> | |
| 73 # include <sys/socket.h> | |
| 74 # include <sys/lwp.h> | |
| 75 # include <pwd.h> | |
| 76 # include <poll.h> | |
| 77 # include <sys/lwp.h> | |
| 78 | |
| 79 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later | |
| 80 # include <sys/procfs.h> // see comment in <sys/procfs.h> | |
| 81 | |
| 82 #define MAX_PATH (2 * K) | |
| 83 | |
| 84 // Minimum stack size for the VM. It's easier to document a constant | |
| 85 // but it's different for x86 and sparc because the page sizes are different. | |
| 86 #ifdef _LP64 | |
| 87 size_t os::Solaris::min_stack_allowed = 128*K; | |
| 88 #else | |
| 89 size_t os::Solaris::min_stack_allowed = 96*K; | |
| 90 #endif | |
| 91 | |
| 92 int os::Solaris::max_register_window_saves_before_flushing() { | |
| 93 // We should detect this at run time. For now, filling | |
| 94 // in with a constant. | |
| 95 return 8; | |
| 96 } | |
| 97 | |
| 98 static void handle_unflushed_register_windows(gwindows_t *win) { | |
| 99 int restore_count = win->wbcnt; | |
| 100 int i; | |
| 101 | |
| 102 for(i=0; i<restore_count; i++) { | |
| 103 address sp = ((address)win->spbuf[i]) + STACK_BIAS; | |
| 104 address reg_win = (address)&win->wbuf[i]; | |
| 105 memcpy(sp,reg_win,sizeof(struct rwindow)); | |
| 106 } | |
| 107 } | |
| 108 | |
| 109 char* os::non_memory_address_word() { | |
| 110 // Must never look like an address returned by reserve_memory, | |
| 111 // even in its subfields (as defined by the CPU immediate fields, | |
| 112 // if the CPU splits constants across multiple instructions). | |
| 113 // On SPARC, 0 != %hi(any real address), because there is no | |
| 114 // allocation in the first 1Kb of the virtual address space. | |
| 115 return (char*) 0; | |
| 116 } | |
| 117 | |
| 118 // Validate a ucontext retrieved from walking a uc_link of a ucontext. | |
| 119 // There are issues with libthread giving out uc_links for different threads | |
| 120 // on the same uc_link chain and bad or circular links. | |
| 121 // | |
| 122 bool os::Solaris::valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect) { | |
| 123 if (valid >= suspect || | |
| 124 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags || | |
| 125 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp || | |
| 126 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) { | |
| 127 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");) | |
| 128 return false; | |
| 129 } | |
| 130 | |
| 131 if (thread->is_Java_thread()) { | |
| 132 if (!valid_stack_address(thread, (address)suspect)) { | |
| 133 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");) | |
| 134 return false; | |
| 135 } | |
| 136 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS); | |
| 137 if (!valid_stack_address(thread, _sp) || | |
| 138 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) { | |
| 139 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");) | |
| 140 return false; | |
| 141 } | |
| 142 } | |
| 143 return true; | |
| 144 } | |
| 145 | |
| 146 // We will only follow one level of uc_link since there are libthread | |
| 147 // issues with ucontext linking and it is better to be safe and just | |
| 148 // let caller retry later. | |
| 149 ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread, | |
| 150 ucontext_t *uc) { | |
| 151 | |
| 152 ucontext_t *retuc = NULL; | |
| 153 | |
| 154 // Sometimes the topmost register windows are not properly flushed. | |
| 155 // i.e., if the kernel would have needed to take a page fault | |
| 156 if (uc != NULL && uc->uc_mcontext.gwins != NULL) { | |
| 157 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); | |
| 158 } | |
| 159 | |
| 160 if (uc != NULL) { | |
| 161 if (uc->uc_link == NULL) { | |
| 162 // cannot validate without uc_link so accept current ucontext | |
| 163 retuc = uc; | |
| 164 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { | |
| 165 // first ucontext is valid so try the next one | |
| 166 uc = uc->uc_link; | |
| 167 if (uc->uc_link == NULL) { | |
| 168 // cannot validate without uc_link so accept current ucontext | |
| 169 retuc = uc; | |
| 170 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { | |
| 171 // the ucontext one level down is also valid so return it | |
| 172 retuc = uc; | |
| 173 } | |
| 174 } | |
| 175 } | |
| 176 return retuc; | |
| 177 } | |
| 178 | |
| 179 // Assumes ucontext is valid | |
| 180 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) { | |
| 181 address pc = (address)uc->uc_mcontext.gregs[REG_PC]; | |
| 182 // set npc to zero to avoid using it for safepoint, good for profiling only | |
| 183 return ExtendedPC(pc); | |
| 184 } | |
| 185 | |
| 186 // Assumes ucontext is valid | |
| 187 intptr_t* os::Solaris::ucontext_get_sp(ucontext_t *uc) { | |
| 188 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS); | |
| 189 } | |
| 190 | |
| 191 // Solaris X86 only | |
| 192 intptr_t* os::Solaris::ucontext_get_fp(ucontext_t *uc) { | |
| 193 ShouldNotReachHere(); | |
| 194 return NULL; | |
| 195 } | |
| 196 | |
| 10405 | 197 address os::Solaris::ucontext_get_pc(ucontext_t *uc) { |
| 198 return (address) uc->uc_mcontext.gregs[REG_PC]; | |
| 199 } | |
| 200 | |
| 201 | |
| 0 | 202 // For Forte Analyzer AsyncGetCallTrace profiling support - thread |
| 203 // is currently interrupted by SIGPROF. | |
| 204 // | |
| 205 // ret_fp parameter is only used by Solaris X86. | |
| 206 // | |
| 207 // The difference between this and os::fetch_frame_from_context() is that | |
| 208 // here we try to skip nested signal frames. | |
| 209 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread, | |
| 210 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { | |
| 211 | |
| 212 assert(thread != NULL, "just checking"); | |
| 213 assert(ret_sp != NULL, "just checking"); | |
| 214 assert(ret_fp == NULL, "just checking"); | |
| 215 | |
| 216 ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc); | |
| 217 | |
| 218 return os::fetch_frame_from_context(luc, ret_sp, ret_fp); | |
| 219 } | |
| 220 | |
| 221 | |
| 222 // ret_fp parameter is only used by Solaris X86. | |
| 223 ExtendedPC os::fetch_frame_from_context(void* ucVoid, | |
| 224 intptr_t** ret_sp, intptr_t** ret_fp) { | |
| 225 | |
| 226 ExtendedPC epc; | |
| 227 ucontext_t *uc = (ucontext_t*)ucVoid; | |
| 228 | |
| 229 if (uc != NULL) { | |
| 230 epc = os::Solaris::ucontext_get_ExtendedPC(uc); | |
| 231 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc); | |
| 232 } else { | |
| 233 // construct empty ExtendedPC for return value checking | |
| 234 epc = ExtendedPC(NULL); | |
| 235 if (ret_sp) *ret_sp = (intptr_t *)NULL; | |
| 236 } | |
| 237 | |
| 238 return epc; | |
| 239 } | |
| 240 | |
| 241 frame os::fetch_frame_from_context(void* ucVoid) { | |
| 242 intptr_t* sp; | |
| 243 intptr_t* fp; | |
| 244 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); | |
| 245 return frame(sp, frame::unpatchable, epc.pc()); | |
| 246 } | |
| 247 | |
| 248 frame os::get_sender_for_C_frame(frame* fr) { | |
| 249 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc()); | |
| 250 } | |
| 251 | |
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252 // Returns an estimate of the current stack pointer. Result must be guaranteed to |
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253 // point into the calling threads stack, and be no lower than the current stack |
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254 // pointer. |
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255 address os::current_stack_pointer() { |
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256 volatile int dummy; |
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257 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right |
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258 return sp; |
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259 } |
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260 |
| 0 | 261 frame os::current_frame() { |
| 262 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); | |
| 263 frame myframe(sp, frame::unpatchable, | |
| 264 CAST_FROM_FN_PTR(address, os::current_frame)); | |
| 265 if (os::is_first_C_frame(&myframe)) { | |
| 266 // stack is not walkable | |
| 267 return frame(NULL, NULL, NULL); | |
| 268 } else { | |
| 269 return os::get_sender_for_C_frame(&myframe); | |
| 270 } | |
| 271 } | |
| 272 | |
| 273 static int threadgetstate(thread_t tid, int *flags, lwpid_t *lwp, stack_t *ss, gregset_t rs, lwpstatus_t *lwpstatus) { | |
| 274 char lwpstatusfile[PROCFILE_LENGTH]; | |
| 275 int lwpfd, err; | |
| 276 | |
| 277 if (err = os::Solaris::thr_getstate(tid, flags, lwp, ss, rs)) | |
| 278 return (err); | |
| 279 if (*flags == TRS_LWPID) { | |
| 280 sprintf(lwpstatusfile, "/proc/%d/lwp/%d/lwpstatus", getpid(), | |
| 281 *lwp); | |
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282 if ((lwpfd = ::open(lwpstatusfile, O_RDONLY)) < 0) { |
| 0 | 283 perror("thr_mutator_status: open lwpstatus"); |
| 284 return (EINVAL); | |
| 285 } | |
| 286 if (pread(lwpfd, lwpstatus, sizeof (lwpstatus_t), (off_t)0) != | |
| 287 sizeof (lwpstatus_t)) { | |
| 288 perror("thr_mutator_status: read lwpstatus"); | |
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289 (void) ::close(lwpfd); |
| 0 | 290 return (EINVAL); |
| 291 } | |
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292 (void) ::close(lwpfd); |
| 0 | 293 } |
| 294 return (0); | |
| 295 } | |
| 296 | |
| 297 | |
| 298 bool os::is_allocatable(size_t bytes) { | |
| 299 #ifdef _LP64 | |
| 300 return true; | |
| 301 #else | |
| 302 return (bytes <= (size_t)3835*M); | |
| 303 #endif | |
| 304 } | |
| 305 | |
| 306 extern "C" void Fetch32PFI () ; | |
| 307 extern "C" void Fetch32Resume () ; | |
| 308 extern "C" void FetchNPFI () ; | |
| 309 extern "C" void FetchNResume () ; | |
| 310 | |
| 2191 | 311 extern "C" JNIEXPORT int |
| 312 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, | |
| 313 int abort_if_unrecognized) { | |
| 0 | 314 ucontext_t* uc = (ucontext_t*) ucVoid; |
| 315 | |
| 316 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
| 317 | |
| 318 SignalHandlerMark shm(t); | |
| 319 | |
| 320 if(sig == SIGPIPE || sig == SIGXFSZ) { | |
| 321 if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
| 322 return true; | |
| 323 } else { | |
| 324 if (PrintMiscellaneous && (WizardMode || Verbose)) { | |
| 325 char buf[64]; | |
| 326 warning("Ignoring %s - see 4229104 or 6499219", | |
| 327 os::exception_name(sig, buf, sizeof(buf))); | |
| 328 | |
| 329 } | |
| 330 return true; | |
| 331 } | |
| 332 } | |
| 333 | |
| 334 JavaThread* thread = NULL; | |
| 335 VMThread* vmthread = NULL; | |
| 336 if (os::Solaris::signal_handlers_are_installed) { | |
| 337 if (t != NULL ){ | |
| 338 if(t->is_Java_thread()) { | |
| 339 thread = (JavaThread*)t; | |
| 340 } | |
| 341 else if(t->is_VM_thread()){ | |
| 342 vmthread = (VMThread *)t; | |
| 343 } | |
| 344 } | |
| 345 } | |
| 346 | |
| 347 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs"); | |
| 348 | |
| 349 if (sig == os::Solaris::SIGasync()) { | |
| 10405 | 350 if (thread || vmthread) { |
| 351 OSThread::SR_handler(t, uc); | |
| 0 | 352 return true; |
| 353 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
| 354 return true; | |
| 355 } else { | |
| 356 // If os::Solaris::SIGasync not chained, and this is a non-vm and | |
| 357 // non-java thread | |
| 358 return true; | |
| 359 } | |
| 360 } | |
| 361 | |
| 362 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { | |
| 363 // can't decode this kind of signal | |
| 364 info = NULL; | |
| 365 } else { | |
| 366 assert(sig == info->si_signo, "bad siginfo"); | |
| 367 } | |
| 368 | |
| 369 // decide if this trap can be handled by a stub | |
| 370 address stub = NULL; | |
| 371 | |
| 372 address pc = NULL; | |
| 373 address npc = NULL; | |
| 374 | |
| 375 //%note os_trap_1 | |
| 376 if (info != NULL && uc != NULL && thread != NULL) { | |
| 377 // factor me: getPCfromContext | |
| 378 pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
| 379 npc = (address) uc->uc_mcontext.gregs[REG_nPC]; | |
| 380 | |
| 381 // SafeFetch() support | |
| 382 // Implemented with either a fixed set of addresses such | |
| 383 // as Fetch32*, or with Thread._OnTrap. | |
| 384 if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(Fetch32PFI)) { | |
| 385 uc->uc_mcontext.gregs [REG_PC] = intptr_t(Fetch32Resume) ; | |
| 386 uc->uc_mcontext.gregs [REG_nPC] = intptr_t(Fetch32Resume) + 4 ; | |
| 387 return true ; | |
| 388 } | |
| 389 if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(FetchNPFI)) { | |
| 390 uc->uc_mcontext.gregs [REG_PC] = intptr_t(FetchNResume) ; | |
| 391 uc->uc_mcontext.gregs [REG_nPC] = intptr_t(FetchNResume) + 4 ; | |
| 392 return true ; | |
| 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_zone(addr)) { | |
| 399 thread->disable_stack_yellow_zone(); | |
| 400 // Sometimes the register windows are not properly flushed. | |
| 401 if(uc->uc_mcontext.gwins != NULL) { | |
| 402 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); | |
| 403 } | |
| 404 if (thread->thread_state() == _thread_in_Java) { | |
| 405 // Throw a stack overflow exception. Guard pages will be reenabled | |
| 406 // while unwinding the stack. | |
| 407 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); | |
| 408 } else { | |
| 409 // Thread was in the vm or native code. Return and try to finish. | |
| 410 return true; | |
| 411 } | |
| 412 } else if (thread->in_stack_red_zone(addr)) { | |
| 413 // Fatal red zone violation. Disable the guard pages and fall through | |
| 414 // to handle_unexpected_exception way down below. | |
| 415 thread->disable_stack_red_zone(); | |
| 416 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); | |
| 417 // Sometimes the register windows are not properly flushed. | |
| 418 if(uc->uc_mcontext.gwins != NULL) { | |
| 419 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); | |
| 420 } | |
| 421 } | |
| 422 } | |
| 423 | |
| 424 | |
| 425 if (thread->thread_state() == _thread_in_vm) { | |
| 426 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) { | |
| 427 stub = StubRoutines::handler_for_unsafe_access(); | |
| 428 } | |
| 429 } | |
| 430 | |
| 431 else if (thread->thread_state() == _thread_in_Java) { | |
| 432 // Java thread running in Java code => find exception handler if any | |
| 433 // a fault inside compiled code, the interpreter, or a stub | |
| 434 | |
| 435 // Support Safepoint Polling | |
| 436 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) { | |
| 437 stub = SharedRuntime::get_poll_stub(pc); | |
| 438 } | |
| 439 | |
| 440 // Not needed on x86 solaris because verify_oops doesn't generate | |
| 441 // SEGV/BUS like sparc does. | |
| 442 if ( (sig == SIGSEGV || sig == SIGBUS) | |
| 443 && pc >= MacroAssembler::_verify_oop_implicit_branch[0] | |
| 444 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) { | |
| 445 stub = MacroAssembler::_verify_oop_implicit_branch[2]; | |
| 446 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr); | |
| 447 } | |
| 448 | |
| 449 // This is not factored because on x86 solaris the patching for | |
| 450 // zombies does not generate a SEGV. | |
| 451 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) { | |
| 452 // zombie method (ld [%g0],%o7 instruction) | |
| 453 stub = SharedRuntime::get_handle_wrong_method_stub(); | |
| 454 | |
| 455 // At the stub it needs to look like a call from the caller of this | |
| 456 // method (not a call from the segv site). | |
| 457 pc = (address)uc->uc_mcontext.gregs[REG_O7]; | |
| 458 } | |
| 459 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { | |
| 460 // BugId 4454115: A read from a MappedByteBuffer can fault | |
| 461 // here if the underlying file has been truncated. | |
| 462 // Do not crash the VM in such a case. | |
| 463 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); | |
| 464 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL; | |
| 465 if (nm != NULL && nm->has_unsafe_access()) { | |
| 466 stub = StubRoutines::handler_for_unsafe_access(); | |
| 467 } | |
| 468 } | |
| 469 | |
| 470 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) { | |
| 471 // integer divide by zero | |
| 472 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
| 473 } | |
| 474 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { | |
| 475 // floating-point divide by zero | |
| 476 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
| 477 } | |
| 478 #ifdef COMPILER2 | |
| 479 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) { | |
| 480 #ifdef ASSERT | |
| 481 #ifdef TIERED | |
| 482 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); | |
| 483 assert(cb->is_compiled_by_c2(), "Wrong compiler"); | |
| 484 #endif // TIERED | |
| 485 #endif // ASSERT | |
| 486 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken. | |
| 487 stub = SharedRuntime::get_ic_miss_stub(); | |
| 488 // At the stub it needs to look like a call from the caller of this | |
| 489 // method (not a call from the segv site). | |
| 490 pc = (address)uc->uc_mcontext.gregs[REG_O7]; | |
| 491 } | |
| 492 #endif // COMPILER2 | |
| 493 | |
| 494 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { | |
| 495 // Determination of interpreter/vtable stub/compiled code null exception | |
| 496 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); | |
| 497 } | |
| 498 } | |
| 499 | |
| 500 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in | |
| 501 // and the heap gets shrunk before the field access. | |
| 502 if ((sig == SIGSEGV) || (sig == SIGBUS)) { | |
| 503 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
| 504 if (addr != (address)-1) { | |
| 505 stub = addr; | |
| 506 } | |
| 507 } | |
| 508 | |
| 509 // Check to see if we caught the safepoint code in the | |
| 510 // process of write protecting the memory serialization page. | |
| 511 // It write enables the page immediately after protecting it | |
| 512 // so just return. | |
| 513 if ((sig == SIGSEGV) && | |
| 514 os::is_memory_serialize_page(thread, (address)info->si_addr)) { | |
| 515 // Block current thread until the memory serialize page permission restored. | |
| 516 os::block_on_serialize_page_trap(); | |
| 517 return true; | |
| 518 } | |
| 519 } | |
| 520 | |
| 521 if (stub != NULL) { | |
| 522 // save all thread context in case we need to restore it | |
| 523 | |
| 524 thread->set_saved_exception_pc(pc); | |
| 525 thread->set_saved_exception_npc(npc); | |
| 526 | |
| 527 // simulate a branch to the stub (a "call" in the safepoint stub case) | |
| 528 // factor me: setPC | |
| 529 uc->uc_mcontext.gregs[REG_PC ] = (greg_t)stub; | |
| 530 uc->uc_mcontext.gregs[REG_nPC] = (greg_t)(stub + 4); | |
| 531 | |
| 532 #ifndef PRODUCT | |
| 533 if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__); | |
| 534 #endif /* PRODUCT */ | |
| 535 | |
| 536 return true; | |
| 537 } | |
| 538 | |
| 539 // signal-chaining | |
| 540 if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
| 541 return true; | |
| 542 } | |
| 543 | |
| 544 if (!abort_if_unrecognized) { | |
| 545 // caller wants another chance, so give it to him | |
| 546 return false; | |
| 547 } | |
| 548 | |
| 549 if (!os::Solaris::libjsig_is_loaded) { | |
| 550 struct sigaction oldAct; | |
| 551 sigaction(sig, (struct sigaction *)0, &oldAct); | |
| 552 if (oldAct.sa_sigaction != signalHandler) { | |
| 553 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 554 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 605 | 555 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand); |
| 0 | 556 } |
| 557 } | |
| 558 | |
| 559 if (pc == NULL && uc != NULL) { | |
| 560 pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
| 561 } | |
| 562 | |
| 1907 | 563 // Sometimes the register windows are not properly flushed. |
| 564 if(uc->uc_mcontext.gwins != NULL) { | |
| 565 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); | |
| 566 } | |
| 567 | |
| 0 | 568 // unmask current signal |
| 569 sigset_t newset; | |
| 570 sigemptyset(&newset); | |
| 571 sigaddset(&newset, sig); | |
| 572 sigprocmask(SIG_UNBLOCK, &newset, NULL); | |
| 573 | |
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574 // Determine which sort of error to throw. Out of swap may signal |
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575 // on the thread stack, which could get a mapping error when touched. |
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576 address addr = (address) info->si_addr; |
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577 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) { |
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578 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack."); |
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579 } |
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580 |
| 0 | 581 VMError err(t, sig, pc, info, ucVoid); |
| 582 err.report_and_die(); | |
| 583 | |
| 584 ShouldNotReachHere(); | |
| 585 } | |
| 586 | |
| 587 void os::print_context(outputStream *st, void *context) { | |
| 588 if (context == NULL) return; | |
| 589 | |
| 590 ucontext_t *uc = (ucontext_t*)context; | |
| 591 st->print_cr("Registers:"); | |
| 592 | |
| 1907 | 593 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT |
| 594 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT, | |
| 595 uc->uc_mcontext.gregs[REG_G1], | |
| 596 uc->uc_mcontext.gregs[REG_G2], | |
| 597 uc->uc_mcontext.gregs[REG_G3], | |
| 598 uc->uc_mcontext.gregs[REG_G4]); | |
| 599 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT | |
| 600 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT, | |
| 601 uc->uc_mcontext.gregs[REG_G5], | |
| 602 uc->uc_mcontext.gregs[REG_G6], | |
| 603 uc->uc_mcontext.gregs[REG_G7], | |
| 604 uc->uc_mcontext.gregs[REG_Y]); | |
| 0 | 605 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT |
| 606 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT, | |
| 607 uc->uc_mcontext.gregs[REG_O0], | |
| 608 uc->uc_mcontext.gregs[REG_O1], | |
| 609 uc->uc_mcontext.gregs[REG_O2], | |
| 610 uc->uc_mcontext.gregs[REG_O3]); | |
| 611 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT | |
| 612 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT, | |
| 613 uc->uc_mcontext.gregs[REG_O4], | |
| 614 uc->uc_mcontext.gregs[REG_O5], | |
| 615 uc->uc_mcontext.gregs[REG_O6], | |
| 616 uc->uc_mcontext.gregs[REG_O7]); | |
| 617 | |
| 1907 | 618 |
| 619 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); | |
| 620 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT | |
| 621 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT, | |
| 622 sp[L0->sp_offset_in_saved_window()], | |
| 623 sp[L1->sp_offset_in_saved_window()], | |
| 624 sp[L2->sp_offset_in_saved_window()], | |
| 625 sp[L3->sp_offset_in_saved_window()]); | |
| 626 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT | |
| 627 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT, | |
| 628 sp[L4->sp_offset_in_saved_window()], | |
| 629 sp[L5->sp_offset_in_saved_window()], | |
| 630 sp[L6->sp_offset_in_saved_window()], | |
| 631 sp[L7->sp_offset_in_saved_window()]); | |
| 632 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT | |
| 633 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT, | |
| 634 sp[I0->sp_offset_in_saved_window()], | |
| 635 sp[I1->sp_offset_in_saved_window()], | |
| 636 sp[I2->sp_offset_in_saved_window()], | |
| 637 sp[I3->sp_offset_in_saved_window()]); | |
| 638 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT | |
| 639 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT, | |
| 640 sp[I4->sp_offset_in_saved_window()], | |
| 641 sp[I5->sp_offset_in_saved_window()], | |
| 642 sp[I6->sp_offset_in_saved_window()], | |
| 643 sp[I7->sp_offset_in_saved_window()]); | |
| 0 | 644 |
| 645 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT, | |
| 646 uc->uc_mcontext.gregs[REG_PC], | |
| 647 uc->uc_mcontext.gregs[REG_nPC]); | |
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648 st->cr(); |
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649 st->cr(); |
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650 |
| 0 | 651 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); |
| 652 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); | |
| 653 st->cr(); | |
| 654 | |
| 655 // Note: it may be unsafe to inspect memory near pc. For example, pc may | |
| 656 // point to garbage if entry point in an nmethod is corrupted. Leave | |
| 657 // this at the end, and hope for the best. | |
| 658 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); | |
| 659 address pc = epc.pc(); | |
| 660 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); | |
| 1907 | 661 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); |
| 662 } | |
| 663 | |
| 664 void os::print_register_info(outputStream *st, void *context) { | |
| 665 if (context == NULL) return; | |
| 666 | |
| 667 ucontext_t *uc = (ucontext_t*)context; | |
| 668 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); | |
| 669 | |
| 670 st->print_cr("Register to memory mapping:"); | |
| 671 st->cr(); | |
| 672 | |
| 673 // this is only for the "general purpose" registers | |
| 674 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]); | |
| 675 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]); | |
| 676 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]); | |
| 677 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]); | |
| 678 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]); | |
| 679 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]); | |
| 680 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]); | |
| 681 st->cr(); | |
| 682 | |
| 683 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]); | |
| 684 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]); | |
| 685 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]); | |
| 686 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]); | |
| 687 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]); | |
| 688 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]); | |
| 689 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]); | |
| 690 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]); | |
| 691 st->cr(); | |
| 692 | |
| 693 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]); | |
| 694 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]); | |
| 695 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]); | |
| 696 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]); | |
| 697 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]); | |
| 698 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]); | |
| 699 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]); | |
| 700 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]); | |
| 701 st->cr(); | |
| 702 | |
| 703 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]); | |
| 704 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]); | |
| 705 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]); | |
| 706 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]); | |
| 707 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]); | |
| 708 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]); | |
| 709 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]); | |
| 710 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]); | |
| 711 st->cr(); | |
| 0 | 712 } |
| 713 | |
| 714 void os::Solaris::init_thread_fpu_state(void) { | |
| 715 // Nothing needed on Sparc. | |
| 716 } | |
| 717 | |
| 718 #if !defined(COMPILER2) && !defined(_LP64) | |
| 719 | |
| 720 // These routines are the initial value of atomic_xchg_entry(), | |
| 721 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry() | |
| 722 // until initialization is complete. | |
| 723 // TODO - remove when the VM drops support for V8. | |
| 724 | |
| 725 typedef jint xchg_func_t (jint, volatile jint*); | |
| 726 typedef jint cmpxchg_func_t (jint, volatile jint*, jint); | |
| 727 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong); | |
| 728 typedef jint add_func_t (jint, volatile jint*); | |
| 729 | |
| 730 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { | |
| 731 // try to use the stub: | |
| 732 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); | |
| 733 | |
| 734 if (func != NULL) { | |
| 735 os::atomic_xchg_func = func; | |
| 736 return (*func)(exchange_value, dest); | |
| 737 } | |
| 738 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 739 | |
| 740 jint old_value = *dest; | |
| 741 *dest = exchange_value; | |
| 742 return old_value; | |
| 743 } | |
| 744 | |
| 745 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { | |
| 746 // try to use the stub: | |
| 747 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); | |
| 748 | |
| 749 if (func != NULL) { | |
| 750 os::atomic_cmpxchg_func = func; | |
| 751 return (*func)(exchange_value, dest, compare_value); | |
| 752 } | |
| 753 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 754 | |
| 755 jint old_value = *dest; | |
| 756 if (old_value == compare_value) | |
| 757 *dest = exchange_value; | |
| 758 return old_value; | |
| 759 } | |
| 760 | |
| 761 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { | |
| 762 // try to use the stub: | |
| 763 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); | |
| 764 | |
| 765 if (func != NULL) { | |
| 766 os::atomic_cmpxchg_long_func = func; | |
| 767 return (*func)(exchange_value, dest, compare_value); | |
| 768 } | |
| 769 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 770 | |
| 771 jlong old_value = *dest; | |
| 772 if (old_value == compare_value) | |
| 773 *dest = exchange_value; | |
| 774 return old_value; | |
| 775 } | |
| 776 | |
| 777 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { | |
| 778 // try to use the stub: | |
| 779 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); | |
| 780 | |
| 781 if (func != NULL) { | |
| 782 os::atomic_add_func = func; | |
| 783 return (*func)(add_value, dest); | |
| 784 } | |
| 785 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 786 | |
| 787 return (*dest) += add_value; | |
| 788 } | |
| 789 | |
| 790 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; | |
| 791 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; | |
| 792 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; | |
| 793 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; | |
| 794 | |
| 795 #endif // !_LP64 && !COMPILER2 | |
| 796 | |
| 797 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE) | |
| 798 // See file build/solaris/makefiles/$compiler.make | |
| 799 // For compiler1 the architecture is v8 and frps isn't present in v8 | |
| 800 extern "C" void _mark_fpu_nosave() { | |
| 801 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :); | |
| 802 } | |
| 803 #endif //defined(__sparc) && defined(COMPILER2) | |
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804 |
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805 #ifndef PRODUCT |
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806 void os::verify_stack_alignment() { |
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807 } |
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808 #endif |