jdk8-mips64-public/hotspot: src/os_cpu/windows_x86/vm/os_windows

src/os_cpu/windows_x86/vm/os_windows_x86.cpp@10842d23f20a (annotated)

src/os_cpu/windows_x86/vm/os_windows_x86.cpp

Wed, 12 Nov 2014 13:12:35 -0500

author: jiangli
date: Wed, 12 Nov 2014 13:12:35 -0500
changeset 7362: 10842d23f20a
parent 6198: 55fb97c4c58d
child 7535: 7ae4e26cb1e0
child 9349: e25662a88116
permissions: -rw-r--r--

8054008: Using -XX:-LazyBootClassLoader crashes with ACCESS_VIOLATION on Win 64bit.
Summary: Only enable the assert for current_stack_pointer after stub routines become available.
Reviewed-by: dholmes, roland, lfoltan

 /*
  * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 // no precompiled headers
 #include "asm/macroAssembler.hpp"
 #include "classfile/classLoader.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "classfile/vmSymbols.hpp"
 #include "code/icBuffer.hpp"
 #include "code/vtableStubs.hpp"
 #include "decoder_windows.hpp"
 #include "interpreter/interpreter.hpp"
 #include "jvm_windows.h"
 #include "memory/allocation.inline.hpp"
 #include "mutex_windows.inline.hpp"
 #include "nativeInst_x86.hpp"
 #include "os_share_windows.hpp"
 #include "prims/jniFastGetField.hpp"
 #include "prims/jvm.h"
 #include "prims/jvm_misc.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/extendedPC.hpp"
 #include "runtime/frame.inline.hpp"
 #include "runtime/interfaceSupport.hpp"
 #include "runtime/java.hpp"
 #include "runtime/javaCalls.hpp"
 #include "runtime/mutexLocker.hpp"
 #include "runtime/osThread.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "runtime/thread.inline.hpp"
 #include "runtime/timer.hpp"
 #include "utilities/events.hpp"
 #include "utilities/vmError.hpp"
 # include "unwind_windows_x86.hpp"
 #undef REG_SP
 #undef REG_FP
 #undef REG_PC
 #ifdef AMD64
 #define REG_SP Rsp
 #define REG_FP Rbp
 #define REG_PC Rip
 #else
 #define REG_SP Esp
 #define REG_FP Ebp
 #define REG_PC Eip
 #endif // AMD64
 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
 // Install a win32 structured exception handler around thread.
 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
   __try {
 #ifndef AMD64
     // We store the current thread in this wrapperthread location
     // and determine how far away this address is from the structured
     // execption pointer that FS:[0] points to.  This get_thread
     // code can then get the thread pointer via FS.
     //
     // Warning:  This routine must NEVER be inlined since we'd end up with
     //           multiple offsets.
     //
     volatile Thread* wrapperthread = thread;
     if ( ThreadLocalStorage::get_thread_ptr_offset() == 0 ) {
       int thread_ptr_offset;
       __asm {
         lea eax, dword ptr wrapperthread;
         sub eax, dword ptr FS:[0H];
         mov thread_ptr_offset, eax
       };
       ThreadLocalStorage::set_thread_ptr_offset(thread_ptr_offset);
     }
 #ifdef ASSERT
     // Verify that the offset hasn't changed since we initally captured
     // it. This might happen if we accidentally ended up with an
     // inlined version of this routine.
     else {
       int test_thread_ptr_offset;
       __asm {
         lea eax, dword ptr wrapperthread;
         sub eax, dword ptr FS:[0H];
         mov test_thread_ptr_offset, eax
       };
       assert(test_thread_ptr_offset == ThreadLocalStorage::get_thread_ptr_offset(),
              "thread pointer offset from SEH changed");
     }
 #endif // ASSERT
 #endif // !AMD64
     f(value, method, args, thread);
   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
       // Nothing to do.
   }
 }
 #ifdef AMD64
 // This is the language specific handler for exceptions
 // originating from dynamically generated code.
 // We call the standard structured exception handler
 // We only expect Continued Execution since we cannot unwind
 // from generated code.
 LONG HandleExceptionFromCodeCache(
   IN PEXCEPTION_RECORD ExceptionRecord,
   IN ULONG64 EstablisherFrame,
   IN OUT PCONTEXT ContextRecord,
   IN OUT PDISPATCHER_CONTEXT DispatcherContext) {
   EXCEPTION_POINTERS ep;
   LONG result;
   ep.ExceptionRecord = ExceptionRecord;
   ep.ContextRecord = ContextRecord;
   result = topLevelExceptionFilter(&ep);
   // We better only get a CONTINUE_EXECUTION from our handler
   // since we don't have unwind information registered.
   guarantee( result == EXCEPTION_CONTINUE_EXECUTION,
              "Unexpected result from topLevelExceptionFilter");
   return(ExceptionContinueExecution);
 }
 // Structure containing the Windows Data Structures required
 // to register our Code Cache exception handler.
 // We put these in the CodeCache since the API requires
 // all addresses in these structures are relative to the Code
 // area registered with RtlAddFunctionTable.
 typedef struct {
   char ExceptionHandlerInstr[16];  // jmp HandleExceptionFromCodeCache
   RUNTIME_FUNCTION rt;
   UNWIND_INFO_EH_ONLY unw;
 } DynamicCodeData, *pDynamicCodeData;
 #endif // AMD64
 //
 // Register our CodeCache area with the OS so it will dispatch exceptions
 // to our topLevelExceptionFilter when we take an exception in our
 // dynamically generated code.
 //
 // Arguments:  low and high are the address of the full reserved
 // codeCache area
 //
 bool os::register_code_area(char *low, char *high) {
 #ifdef AMD64
   ResourceMark rm;
   pDynamicCodeData pDCD;
   PRUNTIME_FUNCTION prt;
   PUNWIND_INFO_EH_ONLY punwind;
   BufferBlob* blob = BufferBlob::create("CodeCache Exception Handler", sizeof(DynamicCodeData));
   CodeBuffer cb(blob);
   MacroAssembler* masm = new MacroAssembler(&cb);
   pDCD = (pDynamicCodeData) masm->pc();
   masm->jump(ExternalAddress((address)&HandleExceptionFromCodeCache));
   masm->flush();
   // Create an Unwind Structure specifying no unwind info
   // other than an Exception Handler
   punwind = &pDCD->unw;
   punwind->Version = 1;
   punwind->Flags = UNW_FLAG_EHANDLER;
   punwind->SizeOfProlog = 0;
   punwind->CountOfCodes = 0;
   punwind->FrameRegister = 0;
   punwind->FrameOffset = 0;
   punwind->ExceptionHandler = (char *)(&(pDCD->ExceptionHandlerInstr[0])) -
                               (char*)low;
   punwind->ExceptionData[0] = 0;
   // This structure describes the covered dynamic code area.
   // Addresses are relative to the beginning on the code cache area
   prt = &pDCD->rt;
   prt->BeginAddress = 0;
   prt->EndAddress = (ULONG)(high - low);
   prt->UnwindData = ((char *)punwind - low);
   guarantee(RtlAddFunctionTable(prt, 1, (ULONGLONG)low),
             "Failed to register Dynamic Code Exception Handler with RtlAddFunctionTable");
 #endif // AMD64
   return true;
 }
 void os::initialize_thread(Thread* thr) {
 // Nothing to do.
 }
 // Atomics and Stub Functions
 typedef jint      xchg_func_t            (jint,     volatile jint*);
 typedef intptr_t  xchg_ptr_func_t        (intptr_t, volatile intptr_t*);
 typedef jint      cmpxchg_func_t         (jint,     volatile jint*,  jint);
 typedef jlong     cmpxchg_long_func_t    (jlong,    volatile jlong*, jlong);
 typedef jint      add_func_t             (jint,     volatile jint*);
 typedef intptr_t  add_ptr_func_t         (intptr_t, volatile intptr_t*);
 #ifdef AMD64
 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) {
   // try to use the stub:
   xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry());
   if (func != NULL) {
     os::atomic_xchg_func = func;
     return (*func)(exchange_value, dest);
   }
   assert(Threads::number_of_threads() == 0, "for bootstrap only");
   jint old_value = *dest;
   *dest = exchange_value;
   return old_value;
 }
 intptr_t os::atomic_xchg_ptr_bootstrap(intptr_t exchange_value, volatile intptr_t* dest) {
   // try to use the stub:
   xchg_ptr_func_t* func = CAST_TO_FN_PTR(xchg_ptr_func_t*, StubRoutines::atomic_xchg_ptr_entry());
   if (func != NULL) {
     os::atomic_xchg_ptr_func = func;
     return (*func)(exchange_value, dest);
   }
   assert(Threads::number_of_threads() == 0, "for bootstrap only");
   intptr_t old_value = *dest;
   *dest = exchange_value;
   return old_value;
 }
 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) {
   // try to use the stub:
   cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry());
   if (func != NULL) {
     os::atomic_cmpxchg_func = func;
     return (*func)(exchange_value, dest, compare_value);
   }
   assert(Threads::number_of_threads() == 0, "for bootstrap only");
   jint old_value = *dest;
   if (old_value == compare_value)
     *dest = exchange_value;
   return old_value;
 }
 #endif // AMD64
 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
   // try to use the stub:
   cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry());
   if (func != NULL) {
     os::atomic_cmpxchg_long_func = func;
     return (*func)(exchange_value, dest, compare_value);
   }
   assert(Threads::number_of_threads() == 0, "for bootstrap only");
   jlong old_value = *dest;
   if (old_value == compare_value)
     *dest = exchange_value;
   return old_value;
 }
 #ifdef AMD64
 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) {
   // try to use the stub:
   add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry());
   if (func != NULL) {
     os::atomic_add_func = func;
     return (*func)(add_value, dest);
   }
   assert(Threads::number_of_threads() == 0, "for bootstrap only");
   return (*dest) += add_value;
 }
 intptr_t os::atomic_add_ptr_bootstrap(intptr_t add_value, volatile intptr_t* dest) {
   // try to use the stub:
   add_ptr_func_t* func = CAST_TO_FN_PTR(add_ptr_func_t*, StubRoutines::atomic_add_ptr_entry());
   if (func != NULL) {
     os::atomic_add_ptr_func = func;
     return (*func)(add_value, dest);
   }
   assert(Threads::number_of_threads() == 0, "for bootstrap only");
   return (*dest) += add_value;
 }
 xchg_func_t*         os::atomic_xchg_func         = os::atomic_xchg_bootstrap;
 xchg_ptr_func_t*     os::atomic_xchg_ptr_func     = os::atomic_xchg_ptr_bootstrap;
 cmpxchg_func_t*      os::atomic_cmpxchg_func      = os::atomic_cmpxchg_bootstrap;
 add_func_t*          os::atomic_add_func          = os::atomic_add_bootstrap;
 add_ptr_func_t*      os::atomic_add_ptr_func      = os::atomic_add_ptr_bootstrap;
 #endif // AMD64
 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap;
 #ifdef AMD64
 /*
  * Windows/x64 does not use stack frames the way expected by Java:
  * [1] in most cases, there is no frame pointer. All locals are addressed via RSP
  * [2] in rare cases, when alloca() is used, a frame pointer is used, but this may
  *     not be RBP.
  * See http://msdn.microsoft.com/en-us/library/ew5tede7.aspx
  *
  * So it's not possible to print the native stack using the
  *     while (...) {...  fr = os::get_sender_for_C_frame(&fr); }
  * loop in vmError.cpp. We need to roll our own loop.
  */
 bool os::platform_print_native_stack(outputStream* st, void* context,
                                      char *buf, int buf_size)
 {
   CONTEXT ctx;
   if (context != NULL) {
     memcpy(&ctx, context, sizeof(ctx));
   } else {
     RtlCaptureContext(&ctx);
   }
   st->print_cr("Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)");
   STACKFRAME stk;
   memset(&stk, 0, sizeof(stk));
   stk.AddrStack.Offset    = ctx.Rsp;
   stk.AddrStack.Mode      = AddrModeFlat;
   stk.AddrFrame.Offset    = ctx.Rbp;
   stk.AddrFrame.Mode      = AddrModeFlat;
   stk.AddrPC.Offset       = ctx.Rip;
   stk.AddrPC.Mode         = AddrModeFlat;
   int count = 0;
   address lastpc = 0;
   while (count++ < StackPrintLimit) {
     intptr_t* sp = (intptr_t*)stk.AddrStack.Offset;
     intptr_t* fp = (intptr_t*)stk.AddrFrame.Offset; // NOT necessarily the same as ctx.Rbp!
     address pc = (address)stk.AddrPC.Offset;
     if (pc != NULL && sp != NULL && fp != NULL) {
       if (count == 2 && lastpc == pc) {
         // Skip it -- StackWalk64() may return the same PC
         // (but different SP) on the first try.
       } else {
         // Don't try to create a frame(sp, fp, pc) -- on WinX64, stk.AddrFrame
         // may not contain what Java expects, and may cause the frame() constructor
         // to crash. Let's just print out the symbolic address.
         frame::print_C_frame(st, buf, buf_size, pc);
         st->cr();
       }
       lastpc = pc;
     } else {
       break;
     }
     PVOID p = WindowsDbgHelp::SymFunctionTableAccess64(GetCurrentProcess(), stk.AddrPC.Offset);
     if (!p) {
       // StackWalk64() can't handle this PC. Calling StackWalk64 again may cause crash.
       break;
     }
     BOOL result = WindowsDbgHelp::StackWalk64(
         IMAGE_FILE_MACHINE_AMD64,  // __in      DWORD MachineType,
         GetCurrentProcess(),       // __in      HANDLE hProcess,
         GetCurrentThread(),        // __in      HANDLE hThread,
         &stk,                      // __inout   LP STACKFRAME64 StackFrame,
         &ctx,                      // __inout   PVOID ContextRecord,
         NULL,                      // __in_opt  PREAD_PROCESS_MEMORY_ROUTINE64 ReadMemoryRoutine,
         WindowsDbgHelp::pfnSymFunctionTableAccess64(),
                                    // __in_opt  PFUNCTION_TABLE_ACCESS_ROUTINE64 FunctionTableAccessRoutine,
         WindowsDbgHelp::pfnSymGetModuleBase64(),
                                    // __in_opt  PGET_MODULE_BASE_ROUTINE64 GetModuleBaseRoutine,
         NULL);                     // __in_opt  PTRANSLATE_ADDRESS_ROUTINE64 TranslateAddress
     if (!result) {
       break;
     }
   }
   if (count > StackPrintLimit) {
     st->print_cr("...<more frames>...");
   }
   st->cr();
   return true;
 }
 #endif // AMD64
 ExtendedPC os::fetch_frame_from_context(void* ucVoid,
                     intptr_t** ret_sp, intptr_t** ret_fp) {
   ExtendedPC  epc;
   CONTEXT* uc = (CONTEXT*)ucVoid;
   if (uc != NULL) {
     epc = ExtendedPC((address)uc->REG_PC);
     if (ret_sp) *ret_sp = (intptr_t*)uc->REG_SP;
     if (ret_fp) *ret_fp = (intptr_t*)uc->REG_FP;
   } else {
     // construct empty ExtendedPC for return value checking
     epc = ExtendedPC(NULL);
     if (ret_sp) *ret_sp = (intptr_t *)NULL;
     if (ret_fp) *ret_fp = (intptr_t *)NULL;
   }
   return epc;
 }
 frame os::fetch_frame_from_context(void* ucVoid) {
   intptr_t* sp;
   intptr_t* fp;
   ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
   return frame(sp, fp, epc.pc());
 }
 // VC++ does not save frame pointer on stack in optimized build. It
 // can be turned off by /Oy-. If we really want to walk C frames,
 // we can use the StackWalk() API.
 frame os::get_sender_for_C_frame(frame* fr) {
   return frame(fr->sender_sp(), fr->link(), fr->sender_pc());
 }
 #ifndef AMD64
 // Returns an estimate of the current stack pointer. Result must be guaranteed
 // to point into the calling threads stack, and be no lower than the current
 // stack pointer.
 address os::current_stack_pointer() {
   int dummy;
   address sp = (address)&dummy;
   return sp;
 }
 #else
 // Returns the current stack pointer. Accurate value needed for
 // os::verify_stack_alignment().
 address os::current_stack_pointer() {
   typedef address get_sp_func();
   get_sp_func* func = CAST_TO_FN_PTR(get_sp_func*,
                                      StubRoutines::x86::get_previous_sp_entry());
   return (*func)();
 }
 #endif
 #ifndef AMD64
 intptr_t* _get_previous_fp() {
   intptr_t **frameptr;
   __asm {
     mov frameptr, ebp
   };
   return *frameptr;
 }
 #endif // !AMD64
 frame os::current_frame() {
 #ifdef AMD64
   // apparently _asm not supported on windows amd64
   typedef intptr_t*      get_fp_func           ();
   get_fp_func* func = CAST_TO_FN_PTR(get_fp_func*,
                                      StubRoutines::x86::get_previous_fp_entry());
   if (func == NULL) return frame();
   intptr_t* fp = (*func)();
   if (fp == NULL) {
     return frame();
   }
 #else
   intptr_t* fp = _get_previous_fp();
 #endif // AMD64
   frame myframe((intptr_t*)os::current_stack_pointer(),
                 (intptr_t*)fp,
                 CAST_FROM_FN_PTR(address, os::current_frame));
   if (os::is_first_C_frame(&myframe)) {
     // stack is not walkable
     return frame();
   } else {
     return os::get_sender_for_C_frame(&myframe);
   }
 }
 void os::print_context(outputStream *st, void *context) {
   if (context == NULL) return;
   CONTEXT* uc = (CONTEXT*)context;
   st->print_cr("Registers:");
 #ifdef AMD64
   st->print(  "RAX=" INTPTR_FORMAT, uc->Rax);
   st->print(", RBX=" INTPTR_FORMAT, uc->Rbx);
   st->print(", RCX=" INTPTR_FORMAT, uc->Rcx);
   st->print(", RDX=" INTPTR_FORMAT, uc->Rdx);
   st->cr();
   st->print(  "RSP=" INTPTR_FORMAT, uc->Rsp);
   st->print(", RBP=" INTPTR_FORMAT, uc->Rbp);
   st->print(", RSI=" INTPTR_FORMAT, uc->Rsi);
   st->print(", RDI=" INTPTR_FORMAT, uc->Rdi);
   st->cr();
   st->print(  "R8 =" INTPTR_FORMAT, uc->R8);
   st->print(", R9 =" INTPTR_FORMAT, uc->R9);
   st->print(", R10=" INTPTR_FORMAT, uc->R10);
   st->print(", R11=" INTPTR_FORMAT, uc->R11);
   st->cr();
   st->print(  "R12=" INTPTR_FORMAT, uc->R12);
   st->print(", R13=" INTPTR_FORMAT, uc->R13);
   st->print(", R14=" INTPTR_FORMAT, uc->R14);
   st->print(", R15=" INTPTR_FORMAT, uc->R15);
   st->cr();
   st->print(  "RIP=" INTPTR_FORMAT, uc->Rip);
   st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags);
 #else
   st->print(  "EAX=" INTPTR_FORMAT, uc->Eax);
   st->print(", EBX=" INTPTR_FORMAT, uc->Ebx);
   st->print(", ECX=" INTPTR_FORMAT, uc->Ecx);
   st->print(", EDX=" INTPTR_FORMAT, uc->Edx);
   st->cr();
   st->print(  "ESP=" INTPTR_FORMAT, uc->Esp);
   st->print(", EBP=" INTPTR_FORMAT, uc->Ebp);
   st->print(", ESI=" INTPTR_FORMAT, uc->Esi);
   st->print(", EDI=" INTPTR_FORMAT, uc->Edi);
   st->cr();
   st->print(  "EIP=" INTPTR_FORMAT, uc->Eip);
   st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags);
 #endif // AMD64
   st->cr();
   st->cr();
   intptr_t *sp = (intptr_t *)uc->REG_SP;
   st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
   print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t));
   st->cr();
   // Note: it may be unsafe to inspect memory near pc. For example, pc may
   // point to garbage if entry point in an nmethod is corrupted. Leave
   // this at the end, and hope for the best.
   address pc = (address)uc->REG_PC;
   st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
   print_hex_dump(st, pc - 32, pc + 32, sizeof(char));
   st->cr();
 }
 void os::print_register_info(outputStream *st, void *context) {
   if (context == NULL) return;
   CONTEXT* uc = (CONTEXT*)context;
   st->print_cr("Register to memory mapping:");
   st->cr();
   // this is only for the "general purpose" registers
 #ifdef AMD64
   st->print("RAX="); print_location(st, uc->Rax);
   st->print("RBX="); print_location(st, uc->Rbx);
   st->print("RCX="); print_location(st, uc->Rcx);
   st->print("RDX="); print_location(st, uc->Rdx);
   st->print("RSP="); print_location(st, uc->Rsp);
   st->print("RBP="); print_location(st, uc->Rbp);
   st->print("RSI="); print_location(st, uc->Rsi);
   st->print("RDI="); print_location(st, uc->Rdi);
   st->print("R8 ="); print_location(st, uc->R8);
   st->print("R9 ="); print_location(st, uc->R9);
   st->print("R10="); print_location(st, uc->R10);
   st->print("R11="); print_location(st, uc->R11);
   st->print("R12="); print_location(st, uc->R12);
   st->print("R13="); print_location(st, uc->R13);
   st->print("R14="); print_location(st, uc->R14);
   st->print("R15="); print_location(st, uc->R15);
 #else
   st->print("EAX="); print_location(st, uc->Eax);
   st->print("EBX="); print_location(st, uc->Ebx);
   st->print("ECX="); print_location(st, uc->Ecx);
   st->print("EDX="); print_location(st, uc->Edx);
   st->print("ESP="); print_location(st, uc->Esp);
   st->print("EBP="); print_location(st, uc->Ebp);
   st->print("ESI="); print_location(st, uc->Esi);
   st->print("EDI="); print_location(st, uc->Edi);
 #endif
   st->cr();
 }
 extern "C" int SpinPause () {
 #ifdef AMD64
    return 0 ;
 #else
    // pause == rep:nop
    // On systems that don't support pause a rep:nop
    // is executed as a nop.  The rep: prefix is ignored.
    _asm {
       pause ;
    };
    return 1 ;
 #endif // AMD64
 }
 void os::setup_fpu() {
 #ifndef AMD64
   int fpu_cntrl_word = StubRoutines::fpu_cntrl_wrd_std();
   __asm fldcw fpu_cntrl_word;
 #endif // !AMD64
 }
 #ifndef PRODUCT
 void os::verify_stack_alignment() {
 #ifdef AMD64
   // The current_stack_pointer() calls generated get_previous_sp stub routine.
   // Only enable the assert after the routine becomes available.
   if (StubRoutines::code1() != NULL) {
     assert(((intptr_t)os::current_stack_pointer() & (StackAlignmentInBytes-1)) == 0, "incorrect stack alignment");
   }
 #endif
 }
 #endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/os_cpu/windows_x86/vm/os_windows_x86.cpp@10842d23f20a (annotated)

src/os_cpu/windows_x86/vm/os_windows_x86.cpp