Mercurial > hg > graal-compiler
annotate src/os_cpu/solaris_x86/vm/os_solaris_x86.cpp @ 5903:da4be62fb889
7147740: add assertions to check stack alignment on VM entry from generated code (x64)
Summary: check stack alignment on VM entry on x64.
Reviewed-by: kvn, never
| author | roland |
|---|---|
| date | Mon, 27 Feb 2012 09:17:44 +0100 |
| parents | 1d1603768966 |
| children | bf2edd3c9b0f |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 1999, 2011, 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 |
| 26 #include "assembler_x86.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_x86.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 | |
| 0 | 61 |
| 62 // put OS-includes here | |
| 63 # include <sys/types.h> | |
| 64 # include <sys/mman.h> | |
| 65 # include <pthread.h> | |
| 66 # include <signal.h> | |
| 67 # include <setjmp.h> | |
| 68 # include <errno.h> | |
| 69 # include <dlfcn.h> | |
| 70 # include <stdio.h> | |
| 71 # include <unistd.h> | |
| 72 # include <sys/resource.h> | |
| 73 # include <thread.h> | |
| 74 # include <sys/stat.h> | |
| 75 # include <sys/time.h> | |
| 76 # include <sys/filio.h> | |
| 77 # include <sys/utsname.h> | |
| 78 # include <sys/systeminfo.h> | |
| 79 # include <sys/socket.h> | |
| 80 # include <sys/trap.h> | |
| 81 # include <sys/lwp.h> | |
| 82 # include <pwd.h> | |
| 83 # include <poll.h> | |
| 84 # include <sys/lwp.h> | |
| 85 # include <procfs.h> // see comment in <sys/procfs.h> | |
| 86 | |
| 87 #ifndef AMD64 | |
| 88 // QQQ seems useless at this point | |
| 89 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later | |
| 90 #endif // AMD64 | |
| 91 # include <sys/procfs.h> // see comment in <sys/procfs.h> | |
| 92 | |
| 93 | |
| 94 #define MAX_PATH (2 * K) | |
| 95 | |
| 96 // Minimum stack size for the VM. It's easier to document a constant value | |
| 97 // but it's different for x86 and sparc because the page sizes are different. | |
| 98 #ifdef AMD64 | |
| 99 size_t os::Solaris::min_stack_allowed = 224*K; | |
| 100 #define REG_SP REG_RSP | |
| 101 #define REG_PC REG_RIP | |
| 102 #define REG_FP REG_RBP | |
| 103 #else | |
| 104 size_t os::Solaris::min_stack_allowed = 64*K; | |
| 105 #define REG_SP UESP | |
| 106 #define REG_PC EIP | |
| 107 #define REG_FP EBP | |
| 108 // 4900493 counter to prevent runaway LDTR refresh attempt | |
| 109 | |
| 110 static volatile int ldtr_refresh = 0; | |
| 111 // the libthread instruction that faults because of the stale LDTR | |
| 112 | |
| 113 static const unsigned char movlfs[] = { 0x8e, 0xe0 // movl %eax,%fs | |
| 114 }; | |
| 115 #endif // AMD64 | |
| 116 | |
| 117 char* os::non_memory_address_word() { | |
| 118 // Must never look like an address returned by reserve_memory, | |
| 119 // even in its subfields (as defined by the CPU immediate fields, | |
| 120 // if the CPU splits constants across multiple instructions). | |
| 121 return (char*) -1; | |
| 122 } | |
| 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 // | |
| 129 bool 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 if (!valid_stack_address(thread, (address) suspect->uc_mcontext.gregs[REG_SP])) { | |
| 144 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");) | |
| 145 return false; | |
| 146 } | |
| 147 } | |
| 148 return true; | |
| 149 } | |
| 150 | |
| 151 // We will only follow one level of uc_link since there are libthread | |
| 152 // issues with ucontext linking and it is better to be safe and just | |
| 153 // let caller retry later. | |
| 154 ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread, | |
| 155 ucontext_t *uc) { | |
| 156 | |
| 157 ucontext_t *retuc = NULL; | |
| 158 | |
| 159 if (uc != NULL) { | |
| 160 if (uc->uc_link == NULL) { | |
| 161 // cannot validate without uc_link so accept current ucontext | |
| 162 retuc = uc; | |
| 163 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { | |
| 164 // first ucontext is valid so try the next one | |
| 165 uc = uc->uc_link; | |
| 166 if (uc->uc_link == NULL) { | |
| 167 // cannot validate without uc_link so accept current ucontext | |
| 168 retuc = uc; | |
| 169 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { | |
| 170 // the ucontext one level down is also valid so return it | |
| 171 retuc = uc; | |
| 172 } | |
| 173 } | |
| 174 } | |
| 175 return retuc; | |
| 176 } | |
| 177 | |
| 178 // Assumes ucontext is valid | |
| 179 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) { | |
| 180 return ExtendedPC((address)uc->uc_mcontext.gregs[REG_PC]); | |
| 181 } | |
| 182 | |
| 183 // Assumes ucontext is valid | |
| 184 intptr_t* os::Solaris::ucontext_get_sp(ucontext_t *uc) { | |
| 185 return (intptr_t*)uc->uc_mcontext.gregs[REG_SP]; | |
| 186 } | |
| 187 | |
| 188 // Assumes ucontext is valid | |
| 189 intptr_t* os::Solaris::ucontext_get_fp(ucontext_t *uc) { | |
| 190 return (intptr_t*)uc->uc_mcontext.gregs[REG_FP]; | |
| 191 } | |
| 192 | |
| 193 // For Forte Analyzer AsyncGetCallTrace profiling support - thread | |
| 194 // is currently interrupted by SIGPROF. | |
| 195 // | |
| 196 // The difference between this and os::fetch_frame_from_context() is that | |
| 197 // here we try to skip nested signal frames. | |
| 198 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread, | |
| 199 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { | |
| 200 | |
| 201 assert(thread != NULL, "just checking"); | |
| 202 assert(ret_sp != NULL, "just checking"); | |
| 203 assert(ret_fp != NULL, "just checking"); | |
| 204 | |
| 205 ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc); | |
| 206 return os::fetch_frame_from_context(luc, ret_sp, ret_fp); | |
| 207 } | |
| 208 | |
| 209 ExtendedPC os::fetch_frame_from_context(void* ucVoid, | |
| 210 intptr_t** ret_sp, intptr_t** ret_fp) { | |
| 211 | |
| 212 ExtendedPC epc; | |
| 213 ucontext_t *uc = (ucontext_t*)ucVoid; | |
| 214 | |
| 215 if (uc != NULL) { | |
| 216 epc = os::Solaris::ucontext_get_ExtendedPC(uc); | |
| 217 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc); | |
| 218 if (ret_fp) *ret_fp = os::Solaris::ucontext_get_fp(uc); | |
| 219 } else { | |
| 220 // construct empty ExtendedPC for return value checking | |
| 221 epc = ExtendedPC(NULL); | |
| 222 if (ret_sp) *ret_sp = (intptr_t *)NULL; | |
| 223 if (ret_fp) *ret_fp = (intptr_t *)NULL; | |
| 224 } | |
| 225 | |
| 226 return epc; | |
| 227 } | |
| 228 | |
| 229 frame os::fetch_frame_from_context(void* ucVoid) { | |
| 230 intptr_t* sp; | |
| 231 intptr_t* fp; | |
| 232 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); | |
| 233 return frame(sp, fp, epc.pc()); | |
| 234 } | |
| 235 | |
| 236 frame os::get_sender_for_C_frame(frame* fr) { | |
| 237 return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); | |
| 238 } | |
| 239 | |
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240 extern "C" intptr_t *_get_current_sp(); // in .il file |
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241 |
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242 address os::current_stack_pointer() { |
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243 return (address)_get_current_sp(); |
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244 } |
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245 |
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246 extern "C" intptr_t *_get_current_fp(); // in .il file |
| 0 | 247 |
| 248 frame os::current_frame() { | |
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249 intptr_t* fp = _get_current_fp(); // it's inlined so want current fp |
| 0 | 250 frame myframe((intptr_t*)os::current_stack_pointer(), |
| 251 (intptr_t*)fp, | |
| 252 CAST_FROM_FN_PTR(address, os::current_frame)); | |
| 253 if (os::is_first_C_frame(&myframe)) { | |
| 254 // stack is not walkable | |
|
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255 frame ret; // This will be a null useless frame |
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256 return ret; |
| 0 | 257 } else { |
| 258 return os::get_sender_for_C_frame(&myframe); | |
| 259 } | |
| 260 } | |
| 261 | |
| 262 // This is a simple callback that just fetches a PC for an interrupted thread. | |
| 263 // The thread need not be suspended and the fetched PC is just a hint. | |
| 264 // This one is currently used for profiling the VMThread ONLY! | |
| 265 | |
| 266 // Must be synchronous | |
| 267 void 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 ExtendedPC new_addr((address)uc->uc_mcontext.gregs[REG_PC]); | |
| 275 _addr = new_addr; | |
| 276 } | |
| 277 | |
| 278 static int threadgetstate(thread_t tid, int *flags, lwpid_t *lwp, stack_t *ss, gregset_t rs, lwpstatus_t *lwpstatus) { | |
| 279 char lwpstatusfile[PROCFILE_LENGTH]; | |
| 280 int lwpfd, err; | |
| 281 | |
| 282 if (err = os::Solaris::thr_getstate(tid, flags, lwp, ss, rs)) | |
| 283 return (err); | |
| 284 if (*flags == TRS_LWPID) { | |
| 285 sprintf(lwpstatusfile, "/proc/%d/lwp/%d/lwpstatus", getpid(), | |
| 286 *lwp); | |
| 287 if ((lwpfd = open(lwpstatusfile, O_RDONLY)) < 0) { | |
| 288 perror("thr_mutator_status: open lwpstatus"); | |
| 289 return (EINVAL); | |
| 290 } | |
| 291 if (pread(lwpfd, lwpstatus, sizeof (lwpstatus_t), (off_t)0) != | |
| 292 sizeof (lwpstatus_t)) { | |
| 293 perror("thr_mutator_status: read lwpstatus"); | |
| 294 (void) close(lwpfd); | |
| 295 return (EINVAL); | |
| 296 } | |
| 297 (void) close(lwpfd); | |
| 298 } | |
| 299 return (0); | |
| 300 } | |
| 301 | |
| 302 #ifndef AMD64 | |
| 303 | |
| 304 // Detecting SSE support by OS | |
| 305 // From solaris_i486.s | |
| 306 extern "C" bool sse_check(); | |
| 307 extern "C" bool sse_unavailable(); | |
| 308 | |
| 309 enum { SSE_UNKNOWN, SSE_NOT_SUPPORTED, SSE_SUPPORTED}; | |
| 310 static int sse_status = SSE_UNKNOWN; | |
| 311 | |
| 312 | |
| 313 static void check_for_sse_support() { | |
| 314 if (!VM_Version::supports_sse()) { | |
| 315 sse_status = SSE_NOT_SUPPORTED; | |
| 316 return; | |
| 317 } | |
| 318 // looking for _sse_hw in libc.so, if it does not exist or | |
| 319 // the value (int) is 0, OS has no support for SSE | |
| 320 int *sse_hwp; | |
| 321 void *h; | |
| 322 | |
| 323 if ((h=dlopen("/usr/lib/libc.so", RTLD_LAZY)) == NULL) { | |
| 324 //open failed, presume no support for SSE | |
| 325 sse_status = SSE_NOT_SUPPORTED; | |
| 326 return; | |
| 327 } | |
| 328 if ((sse_hwp = (int *)dlsym(h, "_sse_hw")) == NULL) { | |
| 329 sse_status = SSE_NOT_SUPPORTED; | |
| 330 } else if (*sse_hwp == 0) { | |
| 331 sse_status = SSE_NOT_SUPPORTED; | |
| 332 } | |
| 333 dlclose(h); | |
| 334 | |
| 335 if (sse_status == SSE_UNKNOWN) { | |
| 336 bool (*try_sse)() = (bool (*)())sse_check; | |
| 337 sse_status = (*try_sse)() ? SSE_SUPPORTED : SSE_NOT_SUPPORTED; | |
| 338 } | |
| 339 | |
| 340 } | |
| 341 | |
| 585 | 342 #endif // AMD64 |
| 343 | |
| 0 | 344 bool os::supports_sse() { |
| 585 | 345 #ifdef AMD64 |
| 346 return true; | |
| 347 #else | |
| 0 | 348 if (sse_status == SSE_UNKNOWN) |
| 349 check_for_sse_support(); | |
| 350 return sse_status == SSE_SUPPORTED; | |
| 585 | 351 #endif // AMD64 |
| 0 | 352 } |
| 353 | |
| 354 bool os::is_allocatable(size_t bytes) { | |
| 355 #ifdef AMD64 | |
| 356 return true; | |
| 357 #else | |
| 358 | |
| 359 if (bytes < 2 * G) { | |
| 360 return true; | |
| 361 } | |
| 362 | |
| 363 char* addr = reserve_memory(bytes, NULL); | |
| 364 | |
| 365 if (addr != NULL) { | |
| 366 release_memory(addr, bytes); | |
| 367 } | |
| 368 | |
| 369 return addr != NULL; | |
| 370 #endif // AMD64 | |
| 371 | |
| 372 } | |
| 373 | |
| 374 extern "C" void Fetch32PFI () ; | |
| 375 extern "C" void Fetch32Resume () ; | |
| 376 #ifdef AMD64 | |
| 377 extern "C" void FetchNPFI () ; | |
| 378 extern "C" void FetchNResume () ; | |
| 379 #endif // AMD64 | |
| 380 | |
| 2191 | 381 extern "C" JNIEXPORT int |
| 382 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, | |
| 383 int abort_if_unrecognized) { | |
| 0 | 384 ucontext_t* uc = (ucontext_t*) ucVoid; |
| 385 | |
| 386 #ifndef AMD64 | |
| 387 if (sig == SIGILL && info->si_addr == (caddr_t)sse_check) { | |
| 388 // the SSE instruction faulted. supports_sse() need return false. | |
| 389 uc->uc_mcontext.gregs[EIP] = (greg_t)sse_unavailable; | |
| 390 return true; | |
| 391 } | |
| 392 #endif // !AMD64 | |
| 393 | |
| 394 Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady | |
| 395 | |
| 396 SignalHandlerMark shm(t); | |
| 397 | |
| 398 if(sig == SIGPIPE || sig == SIGXFSZ) { | |
| 399 if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
| 400 return true; | |
| 401 } else { | |
| 402 if (PrintMiscellaneous && (WizardMode || Verbose)) { | |
| 403 char buf[64]; | |
| 404 warning("Ignoring %s - see 4229104 or 6499219", | |
| 405 os::exception_name(sig, buf, sizeof(buf))); | |
| 406 | |
| 407 } | |
| 408 return true; | |
| 409 } | |
| 410 } | |
| 411 | |
| 412 JavaThread* thread = NULL; | |
| 413 VMThread* vmthread = NULL; | |
| 414 | |
| 415 if (os::Solaris::signal_handlers_are_installed) { | |
| 416 if (t != NULL ){ | |
| 417 if(t->is_Java_thread()) { | |
| 418 thread = (JavaThread*)t; | |
| 419 } | |
| 420 else if(t->is_VM_thread()){ | |
| 421 vmthread = (VMThread *)t; | |
| 422 } | |
| 423 } | |
| 424 } | |
| 425 | |
| 426 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs"); | |
| 427 | |
| 428 if (sig == os::Solaris::SIGasync()) { | |
| 429 if(thread){ | |
| 430 OSThread::InterruptArguments args(thread, uc); | |
| 431 thread->osthread()->do_interrupt_callbacks_at_interrupt(&args); | |
| 432 return true; | |
| 433 } | |
| 434 else if(vmthread){ | |
| 435 OSThread::InterruptArguments args(vmthread, uc); | |
| 436 vmthread->osthread()->do_interrupt_callbacks_at_interrupt(&args); | |
| 437 return true; | |
| 438 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
| 439 return true; | |
| 440 } else { | |
| 441 // If os::Solaris::SIGasync not chained, and this is a non-vm and | |
| 442 // non-java thread | |
| 443 return true; | |
| 444 } | |
| 445 } | |
| 446 | |
| 447 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { | |
| 448 // can't decode this kind of signal | |
| 449 info = NULL; | |
| 450 } else { | |
| 451 assert(sig == info->si_signo, "bad siginfo"); | |
| 452 } | |
| 453 | |
| 454 // decide if this trap can be handled by a stub | |
| 455 address stub = NULL; | |
| 456 | |
| 457 address pc = NULL; | |
| 458 | |
| 459 //%note os_trap_1 | |
| 460 if (info != NULL && uc != NULL && thread != NULL) { | |
| 461 // factor me: getPCfromContext | |
| 462 pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
| 463 | |
| 464 // SafeFetch32() support | |
| 465 if (pc == (address) Fetch32PFI) { | |
| 466 uc->uc_mcontext.gregs[REG_PC] = intptr_t(Fetch32Resume) ; | |
| 467 return true ; | |
| 468 } | |
| 469 #ifdef AMD64 | |
| 470 if (pc == (address) FetchNPFI) { | |
| 471 uc->uc_mcontext.gregs [REG_PC] = intptr_t(FetchNResume) ; | |
| 472 return true ; | |
| 473 } | |
| 474 #endif // AMD64 | |
| 475 | |
| 476 // Handle ALL stack overflow variations here | |
| 477 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) { | |
| 478 address addr = (address) info->si_addr; | |
| 479 if (thread->in_stack_yellow_zone(addr)) { | |
| 480 thread->disable_stack_yellow_zone(); | |
| 481 if (thread->thread_state() == _thread_in_Java) { | |
| 482 // Throw a stack overflow exception. Guard pages will be reenabled | |
| 483 // while unwinding the stack. | |
| 484 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); | |
| 485 } else { | |
| 486 // Thread was in the vm or native code. Return and try to finish. | |
| 487 return true; | |
| 488 } | |
| 489 } else if (thread->in_stack_red_zone(addr)) { | |
| 490 // Fatal red zone violation. Disable the guard pages and fall through | |
| 491 // to handle_unexpected_exception way down below. | |
| 492 thread->disable_stack_red_zone(); | |
| 493 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); | |
| 494 } | |
| 495 } | |
| 496 | |
| 497 if (thread->thread_state() == _thread_in_vm) { | |
| 498 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) { | |
| 499 stub = StubRoutines::handler_for_unsafe_access(); | |
| 500 } | |
| 501 } | |
| 502 | |
| 503 if (thread->thread_state() == _thread_in_Java) { | |
| 504 // Support Safepoint Polling | |
| 505 if ( sig == SIGSEGV && os::is_poll_address((address)info->si_addr)) { | |
| 506 stub = SharedRuntime::get_poll_stub(pc); | |
| 507 } | |
| 508 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { | |
| 509 // BugId 4454115: A read from a MappedByteBuffer can fault | |
| 510 // here if the underlying file has been truncated. | |
| 511 // Do not crash the VM in such a case. | |
| 512 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); | |
| 513 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL; | |
| 514 if (nm != NULL && nm->has_unsafe_access()) { | |
| 515 stub = StubRoutines::handler_for_unsafe_access(); | |
| 516 } | |
| 517 } | |
| 518 else | |
| 519 if (sig == SIGFPE && info->si_code == FPE_INTDIV) { | |
| 520 // integer divide by zero | |
| 521 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
| 522 } | |
| 523 #ifndef AMD64 | |
| 524 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { | |
| 525 // floating-point divide by zero | |
| 526 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
| 527 } | |
| 528 else if (sig == SIGFPE && info->si_code == FPE_FLTINV) { | |
| 529 // The encoding of D2I in i486.ad can cause an exception prior | |
| 530 // to the fist instruction if there was an invalid operation | |
| 531 // pending. We want to dismiss that exception. From the win_32 | |
| 532 // side it also seems that if it really was the fist causing | |
| 533 // the exception that we do the d2i by hand with different | |
| 534 // rounding. Seems kind of weird. QQQ TODO | |
| 535 // Note that we take the exception at the NEXT floating point instruction. | |
| 536 if (pc[0] == 0xDB) { | |
| 537 assert(pc[0] == 0xDB, "not a FIST opcode"); | |
| 538 assert(pc[1] == 0x14, "not a FIST opcode"); | |
| 539 assert(pc[2] == 0x24, "not a FIST opcode"); | |
| 540 return true; | |
| 541 } else { | |
| 542 assert(pc[-3] == 0xDB, "not an flt invalid opcode"); | |
| 543 assert(pc[-2] == 0x14, "not an flt invalid opcode"); | |
| 544 assert(pc[-1] == 0x24, "not an flt invalid opcode"); | |
| 545 } | |
| 546 } | |
| 547 else if (sig == SIGFPE ) { | |
| 548 tty->print_cr("caught SIGFPE, info 0x%x.", info->si_code); | |
| 549 } | |
| 550 #endif // !AMD64 | |
| 551 | |
| 552 // QQQ It doesn't seem that we need to do this on x86 because we should be able | |
| 553 // to return properly from the handler without this extra stuff on the back side. | |
| 554 | |
| 555 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { | |
| 556 // Determination of interpreter/vtable stub/compiled code null exception | |
| 557 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); | |
| 558 } | |
| 559 } | |
| 560 | |
| 561 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in | |
| 562 // and the heap gets shrunk before the field access. | |
| 563 if ((sig == SIGSEGV) || (sig == SIGBUS)) { | |
| 564 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
| 565 if (addr != (address)-1) { | |
| 566 stub = addr; | |
| 567 } | |
| 568 } | |
| 569 | |
| 570 // Check to see if we caught the safepoint code in the | |
| 571 // process of write protecting the memory serialization page. | |
| 572 // It write enables the page immediately after protecting it | |
| 573 // so we can just return to retry the write. | |
| 574 if ((sig == SIGSEGV) && | |
| 575 os::is_memory_serialize_page(thread, (address)info->si_addr)) { | |
| 576 // Block current thread until the memory serialize page permission restored. | |
| 577 os::block_on_serialize_page_trap(); | |
| 578 return true; | |
| 579 } | |
| 580 } | |
| 581 | |
| 582 // Execution protection violation | |
| 583 // | |
| 584 // Preventative code for future versions of Solaris which may | |
| 585 // enable execution protection when running the 32-bit VM on AMD64. | |
| 586 // | |
| 587 // This should be kept as the last step in the triage. We don't | |
| 588 // have a dedicated trap number for a no-execute fault, so be | |
| 589 // conservative and allow other handlers the first shot. | |
| 590 // | |
| 591 // Note: We don't test that info->si_code == SEGV_ACCERR here. | |
| 592 // this si_code is so generic that it is almost meaningless; and | |
| 593 // the si_code for this condition may change in the future. | |
| 594 // Furthermore, a false-positive should be harmless. | |
| 595 if (UnguardOnExecutionViolation > 0 && | |
| 596 (sig == SIGSEGV || sig == SIGBUS) && | |
| 597 uc->uc_mcontext.gregs[TRAPNO] == T_PGFLT) { // page fault | |
| 598 int page_size = os::vm_page_size(); | |
| 599 address addr = (address) info->si_addr; | |
| 600 address pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
| 601 // Make sure the pc and the faulting address are sane. | |
| 602 // | |
| 603 // If an instruction spans a page boundary, and the page containing | |
| 604 // the beginning of the instruction is executable but the following | |
| 605 // page is not, the pc and the faulting address might be slightly | |
| 606 // different - we still want to unguard the 2nd page in this case. | |
| 607 // | |
| 608 // 15 bytes seems to be a (very) safe value for max instruction size. | |
| 609 bool pc_is_near_addr = | |
| 610 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); | |
| 611 bool instr_spans_page_boundary = | |
| 612 (align_size_down((intptr_t) pc ^ (intptr_t) addr, | |
| 613 (intptr_t) page_size) > 0); | |
| 614 | |
| 615 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { | |
| 616 static volatile address last_addr = | |
| 617 (address) os::non_memory_address_word(); | |
| 618 | |
| 619 // In conservative mode, don't unguard unless the address is in the VM | |
| 620 if (addr != last_addr && | |
| 621 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { | |
| 622 | |
|
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623 // Make memory rwx and retry |
| 0 | 624 address page_start = |
| 625 (address) align_size_down((intptr_t) addr, (intptr_t) page_size); | |
|
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626 bool res = os::protect_memory((char*) page_start, page_size, |
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627 os::MEM_PROT_RWX); |
| 0 | 628 |
| 629 if (PrintMiscellaneous && Verbose) { | |
| 630 char buf[256]; | |
| 631 jio_snprintf(buf, sizeof(buf), "Execution protection violation " | |
| 632 "at " INTPTR_FORMAT | |
| 633 ", unguarding " INTPTR_FORMAT ": %s, errno=%d", addr, | |
| 634 page_start, (res ? "success" : "failed"), errno); | |
| 635 tty->print_raw_cr(buf); | |
| 636 } | |
| 637 stub = pc; | |
| 638 | |
| 639 // Set last_addr so if we fault again at the same address, we don't end | |
| 640 // up in an endless loop. | |
| 641 // | |
| 642 // There are two potential complications here. Two threads trapping at | |
| 643 // the same address at the same time could cause one of the threads to | |
| 644 // think it already unguarded, and abort the VM. Likely very rare. | |
| 645 // | |
| 646 // The other race involves two threads alternately trapping at | |
| 647 // different addresses and failing to unguard the page, resulting in | |
| 648 // an endless loop. This condition is probably even more unlikely than | |
| 649 // the first. | |
| 650 // | |
| 651 // Although both cases could be avoided by using locks or thread local | |
| 652 // last_addr, these solutions are unnecessary complication: this | |
| 653 // handler is a best-effort safety net, not a complete solution. It is | |
| 654 // disabled by default and should only be used as a workaround in case | |
| 655 // we missed any no-execute-unsafe VM code. | |
| 656 | |
| 657 last_addr = addr; | |
| 658 } | |
| 659 } | |
| 660 } | |
| 661 | |
| 662 if (stub != NULL) { | |
| 663 // save all thread context in case we need to restore it | |
| 664 | |
| 665 if (thread != NULL) thread->set_saved_exception_pc(pc); | |
| 666 // 12/02/99: On Sparc it appears that the full context is also saved | |
| 667 // but as yet, no one looks at or restores that saved context | |
| 668 // factor me: setPC | |
| 669 uc->uc_mcontext.gregs[REG_PC] = (greg_t)stub; | |
| 670 return true; | |
| 671 } | |
| 672 | |
| 673 // signal-chaining | |
| 674 if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
| 675 return true; | |
| 676 } | |
| 677 | |
| 678 #ifndef AMD64 | |
| 679 // Workaround (bug 4900493) for Solaris kernel bug 4966651. | |
| 680 // Handle an undefined selector caused by an attempt to assign | |
| 681 // fs in libthread getipriptr(). With the current libthread design every 512 | |
| 682 // thread creations the LDT for a private thread data structure is extended | |
| 683 // and thre is a hazard that and another thread attempting a thread creation | |
| 684 // will use a stale LDTR that doesn't reflect the structure's growth, | |
| 685 // causing a GP fault. | |
| 686 // Enforce the probable limit of passes through here to guard against an | |
| 687 // infinite loop if some other move to fs caused the GP fault. Note that | |
| 688 // this loop counter is ultimately a heuristic as it is possible for | |
| 689 // more than one thread to generate this fault at a time in an MP system. | |
| 690 // In the case of the loop count being exceeded or if the poll fails | |
| 691 // just fall through to a fatal error. | |
| 692 // If there is some other source of T_GPFLT traps and the text at EIP is | |
| 693 // unreadable this code will loop infinitely until the stack is exausted. | |
| 694 // The key to diagnosis in this case is to look for the bottom signal handler | |
| 695 // frame. | |
| 696 | |
| 697 if(! IgnoreLibthreadGPFault) { | |
| 698 if (sig == SIGSEGV && uc->uc_mcontext.gregs[TRAPNO] == T_GPFLT) { | |
| 699 const unsigned char *p = | |
| 700 (unsigned const char *) uc->uc_mcontext.gregs[EIP]; | |
| 701 | |
| 702 // Expected instruction? | |
| 703 | |
| 704 if(p[0] == movlfs[0] && p[1] == movlfs[1]) { | |
| 705 | |
| 706 Atomic::inc(&ldtr_refresh); | |
| 707 | |
| 708 // Infinite loop? | |
| 709 | |
| 710 if(ldtr_refresh < ((2 << 16) / PAGESIZE)) { | |
| 711 | |
| 712 // No, force scheduling to get a fresh view of the LDTR | |
| 713 | |
| 714 if(poll(NULL, 0, 10) == 0) { | |
| 715 | |
| 716 // Retry the move | |
| 717 | |
| 718 return false; | |
| 719 } | |
| 720 } | |
| 721 } | |
| 722 } | |
| 723 } | |
| 724 #endif // !AMD64 | |
| 725 | |
| 726 if (!abort_if_unrecognized) { | |
| 727 // caller wants another chance, so give it to him | |
| 728 return false; | |
| 729 } | |
| 730 | |
| 731 if (!os::Solaris::libjsig_is_loaded) { | |
| 732 struct sigaction oldAct; | |
| 733 sigaction(sig, (struct sigaction *)0, &oldAct); | |
| 734 if (oldAct.sa_sigaction != signalHandler) { | |
| 735 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 736 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 605 | 737 warning("Unexpected Signal %d occurred under user-defined signal handler %#lx", sig, (long)sighand); |
| 0 | 738 } |
| 739 } | |
| 740 | |
| 741 if (pc == NULL && uc != NULL) { | |
| 742 pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
| 743 } | |
| 744 | |
| 745 // unmask current signal | |
| 746 sigset_t newset; | |
| 747 sigemptyset(&newset); | |
| 748 sigaddset(&newset, sig); | |
| 749 sigprocmask(SIG_UNBLOCK, &newset, NULL); | |
| 750 | |
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751 // Determine which sort of error to throw. Out of swap may signal |
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752 // on the thread stack, which could get a mapping error when touched. |
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753 address addr = (address) info->si_addr; |
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754 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) { |
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755 vm_exit_out_of_memory(0, "Out of swap space to map in thread stack."); |
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756 } |
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757 |
| 0 | 758 VMError err(t, sig, pc, info, ucVoid); |
| 759 err.report_and_die(); | |
| 760 | |
| 761 ShouldNotReachHere(); | |
| 762 } | |
| 763 | |
| 764 void os::print_context(outputStream *st, void *context) { | |
| 765 if (context == NULL) return; | |
| 766 | |
| 767 ucontext_t *uc = (ucontext_t*)context; | |
| 768 st->print_cr("Registers:"); | |
| 769 #ifdef AMD64 | |
| 770 st->print( "RAX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RAX]); | |
| 771 st->print(", RBX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RBX]); | |
| 772 st->print(", RCX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RCX]); | |
| 773 st->print(", RDX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RDX]); | |
| 774 st->cr(); | |
| 775 st->print( "RSP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RSP]); | |
| 776 st->print(", RBP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RBP]); | |
| 777 st->print(", RSI=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RSI]); | |
| 778 st->print(", RDI=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RDI]); | |
| 779 st->cr(); | |
| 1907 | 780 st->print( "R8 =" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R8]); |
| 781 st->print(", R9 =" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R9]); | |
| 0 | 782 st->print(", R10=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R10]); |
| 783 st->print(", R11=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R11]); | |
| 1250 | 784 st->cr(); |
| 785 st->print( "R12=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R12]); | |
| 0 | 786 st->print(", R13=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R13]); |
| 787 st->print(", R14=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R14]); | |
| 788 st->print(", R15=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R15]); | |
| 789 st->cr(); | |
| 790 st->print( "RIP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RIP]); | |
| 791 st->print(", RFLAGS=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RFL]); | |
| 792 #else | |
| 793 st->print( "EAX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EAX]); | |
| 794 st->print(", EBX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EBX]); | |
| 795 st->print(", ECX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[ECX]); | |
| 796 st->print(", EDX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EDX]); | |
| 797 st->cr(); | |
| 798 st->print( "ESP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[UESP]); | |
| 799 st->print(", EBP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EBP]); | |
| 800 st->print(", ESI=" INTPTR_FORMAT, uc->uc_mcontext.gregs[ESI]); | |
| 801 st->print(", EDI=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EDI]); | |
| 802 st->cr(); | |
| 803 st->print( "EIP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EIP]); | |
| 804 st->print(", EFLAGS=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EFL]); | |
| 805 #endif // AMD64 | |
| 806 st->cr(); | |
| 807 st->cr(); | |
| 808 | |
| 809 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); | |
| 810 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); | |
| 811 print_hex_dump(st, (address)sp, (address)(sp + 8*sizeof(intptr_t)), sizeof(intptr_t)); | |
| 812 st->cr(); | |
| 813 | |
| 814 // Note: it may be unsafe to inspect memory near pc. For example, pc may | |
| 815 // point to garbage if entry point in an nmethod is corrupted. Leave | |
| 816 // this at the end, and hope for the best. | |
| 817 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); | |
| 818 address pc = epc.pc(); | |
| 819 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); | |
| 1907 | 820 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); |
| 821 } | |
| 822 | |
| 823 void os::print_register_info(outputStream *st, void *context) { | |
| 824 if (context == NULL) return; | |
| 825 | |
| 826 ucontext_t *uc = (ucontext_t*)context; | |
| 827 | |
| 828 st->print_cr("Register to memory mapping:"); | |
| 829 st->cr(); | |
| 830 | |
| 831 // this is horrendously verbose but the layout of the registers in the | |
| 832 // context does not match how we defined our abstract Register set, so | |
| 833 // we can't just iterate through the gregs area | |
| 834 | |
| 835 // this is only for the "general purpose" registers | |
| 836 | |
| 837 #ifdef AMD64 | |
| 838 st->print("RAX="); print_location(st, uc->uc_mcontext.gregs[REG_RAX]); | |
| 839 st->print("RBX="); print_location(st, uc->uc_mcontext.gregs[REG_RBX]); | |
| 840 st->print("RCX="); print_location(st, uc->uc_mcontext.gregs[REG_RCX]); | |
| 841 st->print("RDX="); print_location(st, uc->uc_mcontext.gregs[REG_RDX]); | |
| 842 st->print("RSP="); print_location(st, uc->uc_mcontext.gregs[REG_RSP]); | |
| 843 st->print("RBP="); print_location(st, uc->uc_mcontext.gregs[REG_RBP]); | |
| 844 st->print("RSI="); print_location(st, uc->uc_mcontext.gregs[REG_RSI]); | |
| 845 st->print("RDI="); print_location(st, uc->uc_mcontext.gregs[REG_RDI]); | |
| 846 st->print("R8 ="); print_location(st, uc->uc_mcontext.gregs[REG_R8]); | |
| 847 st->print("R9 ="); print_location(st, uc->uc_mcontext.gregs[REG_R9]); | |
| 848 st->print("R10="); print_location(st, uc->uc_mcontext.gregs[REG_R10]); | |
| 849 st->print("R11="); print_location(st, uc->uc_mcontext.gregs[REG_R11]); | |
| 850 st->print("R12="); print_location(st, uc->uc_mcontext.gregs[REG_R12]); | |
| 851 st->print("R13="); print_location(st, uc->uc_mcontext.gregs[REG_R13]); | |
| 852 st->print("R14="); print_location(st, uc->uc_mcontext.gregs[REG_R14]); | |
| 853 st->print("R15="); print_location(st, uc->uc_mcontext.gregs[REG_R15]); | |
| 854 #else | |
| 855 st->print("EAX="); print_location(st, uc->uc_mcontext.gregs[EAX]); | |
| 856 st->print("EBX="); print_location(st, uc->uc_mcontext.gregs[EBX]); | |
| 857 st->print("ECX="); print_location(st, uc->uc_mcontext.gregs[ECX]); | |
| 858 st->print("EDX="); print_location(st, uc->uc_mcontext.gregs[EDX]); | |
| 859 st->print("ESP="); print_location(st, uc->uc_mcontext.gregs[UESP]); | |
| 860 st->print("EBP="); print_location(st, uc->uc_mcontext.gregs[EBP]); | |
| 861 st->print("ESI="); print_location(st, uc->uc_mcontext.gregs[ESI]); | |
| 862 st->print("EDI="); print_location(st, uc->uc_mcontext.gregs[EDI]); | |
| 863 #endif | |
| 864 | |
| 865 st->cr(); | |
| 0 | 866 } |
| 867 | |
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868 |
| 0 | 869 #ifdef AMD64 |
| 870 void os::Solaris::init_thread_fpu_state(void) { | |
| 871 // Nothing to do | |
| 872 } | |
| 873 #else | |
| 874 // From solaris_i486.s | |
| 875 extern "C" void fixcw(); | |
| 876 | |
| 877 void os::Solaris::init_thread_fpu_state(void) { | |
| 878 // Set fpu to 53 bit precision. This happens too early to use a stub. | |
| 879 fixcw(); | |
| 880 } | |
| 881 | |
| 882 // These routines are the initial value of atomic_xchg_entry(), | |
| 883 // atomic_cmpxchg_entry(), atomic_inc_entry() and fence_entry() | |
| 884 // until initialization is complete. | |
| 885 // TODO - replace with .il implementation when compiler supports it. | |
| 886 | |
| 887 typedef jint xchg_func_t (jint, volatile jint*); | |
| 888 typedef jint cmpxchg_func_t (jint, volatile jint*, jint); | |
| 889 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong); | |
| 890 typedef jint add_func_t (jint, volatile jint*); | |
| 891 | |
| 892 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { | |
| 893 // try to use the stub: | |
| 894 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); | |
| 895 | |
| 896 if (func != NULL) { | |
| 897 os::atomic_xchg_func = func; | |
| 898 return (*func)(exchange_value, dest); | |
| 899 } | |
| 900 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 901 | |
| 902 jint old_value = *dest; | |
| 903 *dest = exchange_value; | |
| 904 return old_value; | |
| 905 } | |
| 906 | |
| 907 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { | |
| 908 // try to use the stub: | |
| 909 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); | |
| 910 | |
| 911 if (func != NULL) { | |
| 912 os::atomic_cmpxchg_func = func; | |
| 913 return (*func)(exchange_value, dest, compare_value); | |
| 914 } | |
| 915 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 916 | |
| 917 jint old_value = *dest; | |
| 918 if (old_value == compare_value) | |
| 919 *dest = exchange_value; | |
| 920 return old_value; | |
| 921 } | |
| 922 | |
| 923 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { | |
| 924 // try to use the stub: | |
| 925 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); | |
| 926 | |
| 927 if (func != NULL) { | |
| 928 os::atomic_cmpxchg_long_func = func; | |
| 929 return (*func)(exchange_value, dest, compare_value); | |
| 930 } | |
| 931 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 932 | |
| 933 jlong old_value = *dest; | |
| 934 if (old_value == compare_value) | |
| 935 *dest = exchange_value; | |
| 936 return old_value; | |
| 937 } | |
| 938 | |
| 939 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { | |
| 940 // try to use the stub: | |
| 941 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); | |
| 942 | |
| 943 if (func != NULL) { | |
| 944 os::atomic_add_func = func; | |
| 945 return (*func)(add_value, dest); | |
| 946 } | |
| 947 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 948 | |
| 949 return (*dest) += add_value; | |
| 950 } | |
| 951 | |
| 952 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; | |
| 953 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; | |
| 954 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; | |
| 955 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; | |
| 956 | |
|
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957 extern "C" void _solaris_raw_setup_fpu(address ptr); |
| 0 | 958 void os::setup_fpu() { |
| 959 address fpu_cntrl = StubRoutines::addr_fpu_cntrl_wrd_std(); | |
| 960 _solaris_raw_setup_fpu(fpu_cntrl); | |
| 961 } | |
| 962 #endif // AMD64 | |
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963 |
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964 #ifndef PRODUCT |
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965 void os::verify_stack_alignment() { |
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966 #ifdef AMD64 |
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967 assert(((intptr_t)os::current_stack_pointer() & (StackAlignmentInBytes-1)) == 0, "incorrect stack alignment"); |
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968 #endif |
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969 } |
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970 #endif |