os_windows_x86.cpp revision 7030:51e474c55d20
1/* 2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25// no precompiled headers 26#include "asm/macroAssembler.hpp" 27#include "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 "decoder_windows.hpp" 33#include "interpreter/interpreter.hpp" 34#include "jvm_windows.h" 35#include "memory/allocation.inline.hpp" 36#include "mutex_windows.inline.hpp" 37#include "nativeInst_x86.hpp" 38#include "os_share_windows.hpp" 39#include "prims/jniFastGetField.hpp" 40#include "prims/jvm.h" 41#include "prims/jvm_misc.hpp" 42#include "runtime/arguments.hpp" 43#include "runtime/extendedPC.hpp" 44#include "runtime/frame.inline.hpp" 45#include "runtime/interfaceSupport.hpp" 46#include "runtime/java.hpp" 47#include "runtime/javaCalls.hpp" 48#include "runtime/mutexLocker.hpp" 49#include "runtime/osThread.hpp" 50#include "runtime/sharedRuntime.hpp" 51#include "runtime/stubRoutines.hpp" 52#include "runtime/thread.inline.hpp" 53#include "runtime/timer.hpp" 54#include "utilities/events.hpp" 55#include "utilities/vmError.hpp" 56 57# include "unwind_windows_x86.hpp" 58#undef REG_SP 59#undef REG_FP 60#undef REG_PC 61#ifdef AMD64 62#define REG_SP Rsp 63#define REG_FP Rbp 64#define REG_PC Rip 65#else 66#define REG_SP Esp 67#define REG_FP Ebp 68#define REG_PC Eip 69#endif // AMD64 70 71extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 72 73// Install a win32 structured exception handler around thread. 74void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 75 __try { 76 77#ifndef AMD64 78 // We store the current thread in this wrapperthread location 79 // and determine how far away this address is from the structured 80 // execption pointer that FS:[0] points to. This get_thread 81 // code can then get the thread pointer via FS. 82 // 83 // Warning: This routine must NEVER be inlined since we'd end up with 84 // multiple offsets. 85 // 86 volatile Thread* wrapperthread = thread; 87 88 if ( ThreadLocalStorage::get_thread_ptr_offset() == 0 ) { 89 int thread_ptr_offset; 90 __asm { 91 lea eax, dword ptr wrapperthread; 92 sub eax, dword ptr FS:[0H]; 93 mov thread_ptr_offset, eax 94 }; 95 ThreadLocalStorage::set_thread_ptr_offset(thread_ptr_offset); 96 } 97#ifdef ASSERT 98 // Verify that the offset hasn't changed since we initally captured 99 // it. This might happen if we accidentally ended up with an 100 // inlined version of this routine. 101 else { 102 int test_thread_ptr_offset; 103 __asm { 104 lea eax, dword ptr wrapperthread; 105 sub eax, dword ptr FS:[0H]; 106 mov test_thread_ptr_offset, eax 107 }; 108 assert(test_thread_ptr_offset == ThreadLocalStorage::get_thread_ptr_offset(), 109 "thread pointer offset from SEH changed"); 110 } 111#endif // ASSERT 112#endif // !AMD64 113 114 f(value, method, args, thread); 115 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 116 // Nothing to do. 117 } 118} 119 120#ifdef AMD64 121 122// This is the language specific handler for exceptions 123// originating from dynamically generated code. 124// We call the standard structured exception handler 125// We only expect Continued Execution since we cannot unwind 126// from generated code. 127LONG HandleExceptionFromCodeCache( 128 IN PEXCEPTION_RECORD ExceptionRecord, 129 IN ULONG64 EstablisherFrame, 130 IN OUT PCONTEXT ContextRecord, 131 IN OUT PDISPATCHER_CONTEXT DispatcherContext) { 132 EXCEPTION_POINTERS ep; 133 LONG result; 134 135 ep.ExceptionRecord = ExceptionRecord; 136 ep.ContextRecord = ContextRecord; 137 138 result = topLevelExceptionFilter(&ep); 139 140 // We better only get a CONTINUE_EXECUTION from our handler 141 // since we don't have unwind information registered. 142 143 guarantee( result == EXCEPTION_CONTINUE_EXECUTION, 144 "Unexpected result from topLevelExceptionFilter"); 145 146 return(ExceptionContinueExecution); 147} 148 149 150// Structure containing the Windows Data Structures required 151// to register our Code Cache exception handler. 152// We put these in the CodeCache since the API requires 153// all addresses in these structures are relative to the Code 154// area registered with RtlAddFunctionTable. 155typedef struct { 156 char ExceptionHandlerInstr[16]; // jmp HandleExceptionFromCodeCache 157 RUNTIME_FUNCTION rt; 158 UNWIND_INFO_EH_ONLY unw; 159} DynamicCodeData, *pDynamicCodeData; 160 161#endif // AMD64 162// 163// Register our CodeCache area with the OS so it will dispatch exceptions 164// to our topLevelExceptionFilter when we take an exception in our 165// dynamically generated code. 166// 167// Arguments: low and high are the address of the full reserved 168// codeCache area 169// 170bool os::register_code_area(char *low, char *high) { 171#ifdef AMD64 172 173 ResourceMark rm; 174 175 pDynamicCodeData pDCD; 176 PRUNTIME_FUNCTION prt; 177 PUNWIND_INFO_EH_ONLY punwind; 178 179 BufferBlob* blob = BufferBlob::create("CodeCache Exception Handler", sizeof(DynamicCodeData)); 180 CodeBuffer cb(blob); 181 MacroAssembler* masm = new MacroAssembler(&cb); 182 pDCD = (pDynamicCodeData) masm->pc(); 183 184 masm->jump(ExternalAddress((address)&HandleExceptionFromCodeCache)); 185 masm->flush(); 186 187 // Create an Unwind Structure specifying no unwind info 188 // other than an Exception Handler 189 punwind = &pDCD->unw; 190 punwind->Version = 1; 191 punwind->Flags = UNW_FLAG_EHANDLER; 192 punwind->SizeOfProlog = 0; 193 punwind->CountOfCodes = 0; 194 punwind->FrameRegister = 0; 195 punwind->FrameOffset = 0; 196 punwind->ExceptionHandler = (char *)(&(pDCD->ExceptionHandlerInstr[0])) - 197 (char*)low; 198 punwind->ExceptionData[0] = 0; 199 200 // This structure describes the covered dynamic code area. 201 // Addresses are relative to the beginning on the code cache area 202 prt = &pDCD->rt; 203 prt->BeginAddress = 0; 204 prt->EndAddress = (ULONG)(high - low); 205 prt->UnwindData = ((char *)punwind - low); 206 207 guarantee(RtlAddFunctionTable(prt, 1, (ULONGLONG)low), 208 "Failed to register Dynamic Code Exception Handler with RtlAddFunctionTable"); 209 210#endif // AMD64 211 return true; 212} 213 214void os::initialize_thread(Thread* thr) { 215// Nothing to do. 216} 217 218// Atomics and Stub Functions 219 220typedef jint xchg_func_t (jint, volatile jint*); 221typedef intptr_t xchg_ptr_func_t (intptr_t, volatile intptr_t*); 222typedef jint cmpxchg_func_t (jint, volatile jint*, jint); 223typedef jlong cmpxchg_long_func_t (jlong, volatile jlong*, jlong); 224typedef jint add_func_t (jint, volatile jint*); 225typedef intptr_t add_ptr_func_t (intptr_t, volatile intptr_t*); 226 227#ifdef AMD64 228 229jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { 230 // try to use the stub: 231 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); 232 233 if (func != NULL) { 234 os::atomic_xchg_func = func; 235 return (*func)(exchange_value, dest); 236 } 237 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 238 239 jint old_value = *dest; 240 *dest = exchange_value; 241 return old_value; 242} 243 244intptr_t os::atomic_xchg_ptr_bootstrap(intptr_t exchange_value, volatile intptr_t* dest) { 245 // try to use the stub: 246 xchg_ptr_func_t* func = CAST_TO_FN_PTR(xchg_ptr_func_t*, StubRoutines::atomic_xchg_ptr_entry()); 247 248 if (func != NULL) { 249 os::atomic_xchg_ptr_func = func; 250 return (*func)(exchange_value, dest); 251 } 252 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 253 254 intptr_t old_value = *dest; 255 *dest = exchange_value; 256 return old_value; 257} 258 259 260jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { 261 // try to use the stub: 262 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); 263 264 if (func != NULL) { 265 os::atomic_cmpxchg_func = func; 266 return (*func)(exchange_value, dest, compare_value); 267 } 268 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 269 270 jint old_value = *dest; 271 if (old_value == compare_value) 272 *dest = exchange_value; 273 return old_value; 274} 275#endif // AMD64 276 277jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { 278 // try to use the stub: 279 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); 280 281 if (func != NULL) { 282 os::atomic_cmpxchg_long_func = func; 283 return (*func)(exchange_value, dest, compare_value); 284 } 285 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 286 287 jlong old_value = *dest; 288 if (old_value == compare_value) 289 *dest = exchange_value; 290 return old_value; 291} 292 293#ifdef AMD64 294 295jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { 296 // try to use the stub: 297 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); 298 299 if (func != NULL) { 300 os::atomic_add_func = func; 301 return (*func)(add_value, dest); 302 } 303 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 304 305 return (*dest) += add_value; 306} 307 308intptr_t os::atomic_add_ptr_bootstrap(intptr_t add_value, volatile intptr_t* dest) { 309 // try to use the stub: 310 add_ptr_func_t* func = CAST_TO_FN_PTR(add_ptr_func_t*, StubRoutines::atomic_add_ptr_entry()); 311 312 if (func != NULL) { 313 os::atomic_add_ptr_func = func; 314 return (*func)(add_value, dest); 315 } 316 assert(Threads::number_of_threads() == 0, "for bootstrap only"); 317 318 return (*dest) += add_value; 319} 320 321xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; 322xchg_ptr_func_t* os::atomic_xchg_ptr_func = os::atomic_xchg_ptr_bootstrap; 323cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; 324add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; 325add_ptr_func_t* os::atomic_add_ptr_func = os::atomic_add_ptr_bootstrap; 326 327#endif // AMD64 328 329cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; 330 331#ifdef AMD64 332/* 333 * Windows/x64 does not use stack frames the way expected by Java: 334 * [1] in most cases, there is no frame pointer. All locals are addressed via RSP 335 * [2] in rare cases, when alloca() is used, a frame pointer is used, but this may 336 * not be RBP. 337 * See http://msdn.microsoft.com/en-us/library/ew5tede7.aspx 338 * 339 * So it's not possible to print the native stack using the 340 * while (...) {... fr = os::get_sender_for_C_frame(&fr); } 341 * loop in vmError.cpp. We need to roll our own loop. 342 */ 343bool os::platform_print_native_stack(outputStream* st, void* context, 344 char *buf, int buf_size) 345{ 346 CONTEXT ctx; 347 if (context != NULL) { 348 memcpy(&ctx, context, sizeof(ctx)); 349 } else { 350 RtlCaptureContext(&ctx); 351 } 352 353 st->print_cr("Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)"); 354 355 STACKFRAME stk; 356 memset(&stk, 0, sizeof(stk)); 357 stk.AddrStack.Offset = ctx.Rsp; 358 stk.AddrStack.Mode = AddrModeFlat; 359 stk.AddrFrame.Offset = ctx.Rbp; 360 stk.AddrFrame.Mode = AddrModeFlat; 361 stk.AddrPC.Offset = ctx.Rip; 362 stk.AddrPC.Mode = AddrModeFlat; 363 364 int count = 0; 365 address lastpc = 0; 366 while (count++ < StackPrintLimit) { 367 intptr_t* sp = (intptr_t*)stk.AddrStack.Offset; 368 intptr_t* fp = (intptr_t*)stk.AddrFrame.Offset; // NOT necessarily the same as ctx.Rbp! 369 address pc = (address)stk.AddrPC.Offset; 370 371 if (pc != NULL && sp != NULL && fp != NULL) { 372 if (count == 2 && lastpc == pc) { 373 // Skip it -- StackWalk64() may return the same PC 374 // (but different SP) on the first try. 375 } else { 376 // Don't try to create a frame(sp, fp, pc) -- on WinX64, stk.AddrFrame 377 // may not contain what Java expects, and may cause the frame() constructor 378 // to crash. Let's just print out the symbolic address. 379 frame::print_C_frame(st, buf, buf_size, pc); 380 st->cr(); 381 } 382 lastpc = pc; 383 } else { 384 break; 385 } 386 387 PVOID p = WindowsDbgHelp::SymFunctionTableAccess64(GetCurrentProcess(), stk.AddrPC.Offset); 388 if (!p) { 389 // StackWalk64() can't handle this PC. Calling StackWalk64 again may cause crash. 390 break; 391 } 392 393 BOOL result = WindowsDbgHelp::StackWalk64( 394 IMAGE_FILE_MACHINE_AMD64, // __in DWORD MachineType, 395 GetCurrentProcess(), // __in HANDLE hProcess, 396 GetCurrentThread(), // __in HANDLE hThread, 397 &stk, // __inout LP STACKFRAME64 StackFrame, 398 &ctx, // __inout PVOID ContextRecord, 399 NULL, // __in_opt PREAD_PROCESS_MEMORY_ROUTINE64 ReadMemoryRoutine, 400 WindowsDbgHelp::pfnSymFunctionTableAccess64(), 401 // __in_opt PFUNCTION_TABLE_ACCESS_ROUTINE64 FunctionTableAccessRoutine, 402 WindowsDbgHelp::pfnSymGetModuleBase64(), 403 // __in_opt PGET_MODULE_BASE_ROUTINE64 GetModuleBaseRoutine, 404 NULL); // __in_opt PTRANSLATE_ADDRESS_ROUTINE64 TranslateAddress 405 406 if (!result) { 407 break; 408 } 409 } 410 if (count > StackPrintLimit) { 411 st->print_cr("...<more frames>..."); 412 } 413 st->cr(); 414 415 return true; 416} 417#endif // AMD64 418 419ExtendedPC os::fetch_frame_from_context(void* ucVoid, 420 intptr_t** ret_sp, intptr_t** ret_fp) { 421 422 ExtendedPC epc; 423 CONTEXT* uc = (CONTEXT*)ucVoid; 424 425 if (uc != NULL) { 426 epc = ExtendedPC((address)uc->REG_PC); 427 if (ret_sp) *ret_sp = (intptr_t*)uc->REG_SP; 428 if (ret_fp) *ret_fp = (intptr_t*)uc->REG_FP; 429 } else { 430 // construct empty ExtendedPC for return value checking 431 epc = ExtendedPC(NULL); 432 if (ret_sp) *ret_sp = (intptr_t *)NULL; 433 if (ret_fp) *ret_fp = (intptr_t *)NULL; 434 } 435 436 return epc; 437} 438 439frame os::fetch_frame_from_context(void* ucVoid) { 440 intptr_t* sp; 441 intptr_t* fp; 442 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); 443 return frame(sp, fp, epc.pc()); 444} 445 446// VC++ does not save frame pointer on stack in optimized build. It 447// can be turned off by /Oy-. If we really want to walk C frames, 448// we can use the StackWalk() API. 449frame os::get_sender_for_C_frame(frame* fr) { 450 return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); 451} 452 453#ifndef AMD64 454// Returns an estimate of the current stack pointer. Result must be guaranteed 455// to point into the calling threads stack, and be no lower than the current 456// stack pointer. 457address os::current_stack_pointer() { 458 int dummy; 459 address sp = (address)&dummy; 460 return sp; 461} 462#else 463// Returns the current stack pointer. Accurate value needed for 464// os::verify_stack_alignment(). 465address os::current_stack_pointer() { 466 typedef address get_sp_func(); 467 get_sp_func* func = CAST_TO_FN_PTR(get_sp_func*, 468 StubRoutines::x86::get_previous_sp_entry()); 469 return (*func)(); 470} 471#endif 472 473 474#ifndef AMD64 475intptr_t* _get_previous_fp() { 476 intptr_t **frameptr; 477 __asm { 478 mov frameptr, ebp 479 }; 480 return *frameptr; 481} 482#endif // !AMD64 483 484frame os::current_frame() { 485 486#ifdef AMD64 487 // apparently _asm not supported on windows amd64 488 typedef intptr_t* get_fp_func (); 489 get_fp_func* func = CAST_TO_FN_PTR(get_fp_func*, 490 StubRoutines::x86::get_previous_fp_entry()); 491 if (func == NULL) return frame(); 492 intptr_t* fp = (*func)(); 493 if (fp == NULL) { 494 return frame(); 495 } 496#else 497 intptr_t* fp = _get_previous_fp(); 498#endif // AMD64 499 500 frame myframe((intptr_t*)os::current_stack_pointer(), 501 (intptr_t*)fp, 502 CAST_FROM_FN_PTR(address, os::current_frame)); 503 if (os::is_first_C_frame(&myframe)) { 504 // stack is not walkable 505 return frame(); 506 } else { 507 return os::get_sender_for_C_frame(&myframe); 508 } 509} 510 511void os::print_context(outputStream *st, void *context) { 512 if (context == NULL) return; 513 514 CONTEXT* uc = (CONTEXT*)context; 515 516 st->print_cr("Registers:"); 517#ifdef AMD64 518 st->print( "RAX=" INTPTR_FORMAT, uc->Rax); 519 st->print(", RBX=" INTPTR_FORMAT, uc->Rbx); 520 st->print(", RCX=" INTPTR_FORMAT, uc->Rcx); 521 st->print(", RDX=" INTPTR_FORMAT, uc->Rdx); 522 st->cr(); 523 st->print( "RSP=" INTPTR_FORMAT, uc->Rsp); 524 st->print(", RBP=" INTPTR_FORMAT, uc->Rbp); 525 st->print(", RSI=" INTPTR_FORMAT, uc->Rsi); 526 st->print(", RDI=" INTPTR_FORMAT, uc->Rdi); 527 st->cr(); 528 st->print( "R8 =" INTPTR_FORMAT, uc->R8); 529 st->print(", R9 =" INTPTR_FORMAT, uc->R9); 530 st->print(", R10=" INTPTR_FORMAT, uc->R10); 531 st->print(", R11=" INTPTR_FORMAT, uc->R11); 532 st->cr(); 533 st->print( "R12=" INTPTR_FORMAT, uc->R12); 534 st->print(", R13=" INTPTR_FORMAT, uc->R13); 535 st->print(", R14=" INTPTR_FORMAT, uc->R14); 536 st->print(", R15=" INTPTR_FORMAT, uc->R15); 537 st->cr(); 538 st->print( "RIP=" INTPTR_FORMAT, uc->Rip); 539 st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags); 540#else 541 st->print( "EAX=" INTPTR_FORMAT, uc->Eax); 542 st->print(", EBX=" INTPTR_FORMAT, uc->Ebx); 543 st->print(", ECX=" INTPTR_FORMAT, uc->Ecx); 544 st->print(", EDX=" INTPTR_FORMAT, uc->Edx); 545 st->cr(); 546 st->print( "ESP=" INTPTR_FORMAT, uc->Esp); 547 st->print(", EBP=" INTPTR_FORMAT, uc->Ebp); 548 st->print(", ESI=" INTPTR_FORMAT, uc->Esi); 549 st->print(", EDI=" INTPTR_FORMAT, uc->Edi); 550 st->cr(); 551 st->print( "EIP=" INTPTR_FORMAT, uc->Eip); 552 st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags); 553#endif // AMD64 554 st->cr(); 555 st->cr(); 556 557 intptr_t *sp = (intptr_t *)uc->REG_SP; 558 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); 559 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); 560 st->cr(); 561 562 // Note: it may be unsafe to inspect memory near pc. For example, pc may 563 // point to garbage if entry point in an nmethod is corrupted. Leave 564 // this at the end, and hope for the best. 565 address pc = (address)uc->REG_PC; 566 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); 567 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); 568 st->cr(); 569} 570 571 572void os::print_register_info(outputStream *st, void *context) { 573 if (context == NULL) return; 574 575 CONTEXT* uc = (CONTEXT*)context; 576 577 st->print_cr("Register to memory mapping:"); 578 st->cr(); 579 580 // this is only for the "general purpose" registers 581 582#ifdef AMD64 583 st->print("RAX="); print_location(st, uc->Rax); 584 st->print("RBX="); print_location(st, uc->Rbx); 585 st->print("RCX="); print_location(st, uc->Rcx); 586 st->print("RDX="); print_location(st, uc->Rdx); 587 st->print("RSP="); print_location(st, uc->Rsp); 588 st->print("RBP="); print_location(st, uc->Rbp); 589 st->print("RSI="); print_location(st, uc->Rsi); 590 st->print("RDI="); print_location(st, uc->Rdi); 591 st->print("R8 ="); print_location(st, uc->R8); 592 st->print("R9 ="); print_location(st, uc->R9); 593 st->print("R10="); print_location(st, uc->R10); 594 st->print("R11="); print_location(st, uc->R11); 595 st->print("R12="); print_location(st, uc->R12); 596 st->print("R13="); print_location(st, uc->R13); 597 st->print("R14="); print_location(st, uc->R14); 598 st->print("R15="); print_location(st, uc->R15); 599#else 600 st->print("EAX="); print_location(st, uc->Eax); 601 st->print("EBX="); print_location(st, uc->Ebx); 602 st->print("ECX="); print_location(st, uc->Ecx); 603 st->print("EDX="); print_location(st, uc->Edx); 604 st->print("ESP="); print_location(st, uc->Esp); 605 st->print("EBP="); print_location(st, uc->Ebp); 606 st->print("ESI="); print_location(st, uc->Esi); 607 st->print("EDI="); print_location(st, uc->Edi); 608#endif 609 610 st->cr(); 611} 612 613extern "C" int SpinPause () { 614#ifdef AMD64 615 return 0 ; 616#else 617 // pause == rep:nop 618 // On systems that don't support pause a rep:nop 619 // is executed as a nop. The rep: prefix is ignored. 620 _asm { 621 pause ; 622 }; 623 return 1 ; 624#endif // AMD64 625} 626 627 628void os::setup_fpu() { 629#ifndef AMD64 630 int fpu_cntrl_word = StubRoutines::fpu_cntrl_wrd_std(); 631 __asm fldcw fpu_cntrl_word; 632#endif // !AMD64 633} 634 635#ifndef PRODUCT 636void os::verify_stack_alignment() { 637#ifdef AMD64 638 assert(((intptr_t)os::current_stack_pointer() & (StackAlignmentInBytes-1)) == 0, "incorrect stack alignment"); 639#endif 640} 641#endif 642 643int os::extra_bang_size_in_bytes() { 644 // JDK-8050147 requires the full cache line bang for x86. 645 return VM_Version::L1_line_size(); 646} 647