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/*
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* Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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// do not include precompiled header file
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# include "incls/_os_windows_x86.cpp.incl"
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# include "unwind_windows_x86.hpp"
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#undef REG_SP
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#undef REG_FP
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#undef REG_PC
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#ifdef AMD64
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#define REG_SP Rsp
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#define REG_FP Rbp
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#define REG_PC Rip
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#else
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#define REG_SP Esp
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#define REG_FP Ebp
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#define REG_PC Eip
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#endif // AMD64
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extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
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// Install a win32 structured exception handler around thread.
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void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
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__try {
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#ifndef AMD64
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// We store the current thread in this wrapperthread location
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// and determine how far away this address is from the structured
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// execption pointer that FS:[0] points to. This get_thread
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// code can then get the thread pointer via FS.
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//
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// Warning: This routine must NEVER be inlined since we'd end up with
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// multiple offsets.
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//
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volatile Thread* wrapperthread = thread;
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if ( ThreadLocalStorage::get_thread_ptr_offset() == 0 ) {
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int thread_ptr_offset;
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__asm {
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lea eax, dword ptr wrapperthread;
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sub eax, dword ptr FS:[0H];
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mov thread_ptr_offset, eax
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};
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ThreadLocalStorage::set_thread_ptr_offset(thread_ptr_offset);
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}
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#ifdef ASSERT
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// Verify that the offset hasn't changed since we initally captured
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// it. This might happen if we accidentally ended up with an
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// inlined version of this routine.
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else {
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int test_thread_ptr_offset;
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__asm {
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lea eax, dword ptr wrapperthread;
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sub eax, dword ptr FS:[0H];
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mov test_thread_ptr_offset, eax
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};
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assert(test_thread_ptr_offset == ThreadLocalStorage::get_thread_ptr_offset(),
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"thread pointer offset from SEH changed");
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}
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#endif // ASSERT
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#endif // !AMD64
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f(value, method, args, thread);
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} __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
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// Nothing to do.
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}
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}
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#ifdef AMD64
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// This is the language specific handler for exceptions
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// originating from dynamically generated code.
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// We call the standard structured exception handler
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// We only expect Continued Execution since we cannot unwind
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// from generated code.
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LONG HandleExceptionFromCodeCache(
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IN PEXCEPTION_RECORD ExceptionRecord,
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IN ULONG64 EstablisherFrame,
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IN OUT PCONTEXT ContextRecord,
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IN OUT PDISPATCHER_CONTEXT DispatcherContext) {
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EXCEPTION_POINTERS ep;
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LONG result;
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ep.ExceptionRecord = ExceptionRecord;
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ep.ContextRecord = ContextRecord;
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result = topLevelExceptionFilter(&ep);
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// We better only get a CONTINUE_EXECUTION from our handler
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// since we don't have unwind information registered.
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guarantee( result == EXCEPTION_CONTINUE_EXECUTION,
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"Unexpected result from topLevelExceptionFilter");
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return(ExceptionContinueExecution);
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}
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// Structure containing the Windows Data Structures required
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// to register our Code Cache exception handler.
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// We put these in the CodeCache since the API requires
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// all addresses in these structures are relative to the Code
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// area registered with RtlAddFunctionTable.
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typedef struct {
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char ExceptionHandlerInstr[16]; // jmp HandleExceptionFromCodeCache
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RUNTIME_FUNCTION rt;
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UNWIND_INFO_EH_ONLY unw;
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} DynamicCodeData, *pDynamicCodeData;
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#endif // AMD64
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//
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// Register our CodeCache area with the OS so it will dispatch exceptions
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// to our topLevelExceptionFilter when we take an exception in our
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// dynamically generated code.
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//
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// Arguments: low and high are the address of the full reserved
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// codeCache area
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//
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bool os::register_code_area(char *low, char *high) {
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#ifdef AMD64
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ResourceMark rm;
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pDynamicCodeData pDCD;
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PRUNTIME_FUNCTION prt;
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PUNWIND_INFO_EH_ONLY punwind;
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// If we are using Vectored Exceptions we don't need this registration
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if (UseVectoredExceptions) return true;
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BufferBlob* b = BufferBlob::create("CodeCache Exception Handler", sizeof (DynamicCodeData));
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CodeBuffer cb(b->instructions_begin(), b->instructions_size());
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MacroAssembler* masm = new MacroAssembler(&cb);
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pDCD = (pDynamicCodeData) masm->pc();
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masm->jump(ExternalAddress((address)&HandleExceptionFromCodeCache));
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masm->flush();
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// Create an Unwind Structure specifying no unwind info
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// other than an Exception Handler
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punwind = &pDCD->unw;
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punwind->Version = 1;
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punwind->Flags = UNW_FLAG_EHANDLER;
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punwind->SizeOfProlog = 0;
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punwind->CountOfCodes = 0;
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punwind->FrameRegister = 0;
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punwind->FrameOffset = 0;
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punwind->ExceptionHandler = (char *)(&(pDCD->ExceptionHandlerInstr[0])) -
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(char*)low;
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punwind->ExceptionData[0] = 0;
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// This structure describes the covered dynamic code area.
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// Addresses are relative to the beginning on the code cache area
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prt = &pDCD->rt;
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prt->BeginAddress = 0;
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prt->EndAddress = (ULONG)(high - low);
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prt->UnwindData = ((char *)punwind - low);
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guarantee(RtlAddFunctionTable(prt, 1, (ULONGLONG)low),
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"Failed to register Dynamic Code Exception Handler with RtlAddFunctionTable");
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#endif // AMD64
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return true;
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}
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void os::initialize_thread() {
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// Nothing to do.
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}
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// Atomics and Stub Functions
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typedef jint xchg_func_t (jint, volatile jint*);
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typedef intptr_t xchg_ptr_func_t (intptr_t, volatile intptr_t*);
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typedef jint cmpxchg_func_t (jint, volatile jint*, jint);
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typedef jlong cmpxchg_long_func_t (jlong, volatile jlong*, jlong);
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typedef jint add_func_t (jint, volatile jint*);
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typedef intptr_t add_ptr_func_t (intptr_t, volatile intptr_t*);
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typedef void fence_func_t ();
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#ifdef AMD64
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jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) {
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// try to use the stub:
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xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry());
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if (func != NULL) {
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os::atomic_xchg_func = func;
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return (*func)(exchange_value, dest);
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}
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assert(Threads::number_of_threads() == 0, "for bootstrap only");
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jint old_value = *dest;
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*dest = exchange_value;
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return old_value;
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}
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intptr_t os::atomic_xchg_ptr_bootstrap(intptr_t exchange_value, volatile intptr_t* dest) {
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// try to use the stub:
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xchg_ptr_func_t* func = CAST_TO_FN_PTR(xchg_ptr_func_t*, StubRoutines::atomic_xchg_ptr_entry());
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if (func != NULL) {
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os::atomic_xchg_ptr_func = func;
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return (*func)(exchange_value, dest);
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}
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assert(Threads::number_of_threads() == 0, "for bootstrap only");
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intptr_t old_value = *dest;
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*dest = exchange_value;
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return old_value;
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}
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jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) {
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// try to use the stub:
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cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry());
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if (func != NULL) {
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os::atomic_cmpxchg_func = func;
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return (*func)(exchange_value, dest, compare_value);
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}
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assert(Threads::number_of_threads() == 0, "for bootstrap only");
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jint old_value = *dest;
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if (old_value == compare_value)
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*dest = exchange_value;
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return old_value;
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}
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#endif // AMD64
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jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
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// try to use the stub:
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cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry());
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if (func != NULL) {
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os::atomic_cmpxchg_long_func = func;
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return (*func)(exchange_value, dest, compare_value);
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}
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assert(Threads::number_of_threads() == 0, "for bootstrap only");
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jlong old_value = *dest;
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if (old_value == compare_value)
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*dest = exchange_value;
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return old_value;
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}
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#ifdef AMD64
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jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) {
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// try to use the stub:
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add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry());
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if (func != NULL) {
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os::atomic_add_func = func;
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return (*func)(add_value, dest);
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}
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assert(Threads::number_of_threads() == 0, "for bootstrap only");
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return (*dest) += add_value;
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}
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intptr_t os::atomic_add_ptr_bootstrap(intptr_t add_value, volatile intptr_t* dest) {
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// try to use the stub:
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add_ptr_func_t* func = CAST_TO_FN_PTR(add_ptr_func_t*, StubRoutines::atomic_add_ptr_entry());
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if (func != NULL) {
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os::atomic_add_ptr_func = func;
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return (*func)(add_value, dest);
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}
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assert(Threads::number_of_threads() == 0, "for bootstrap only");
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return (*dest) += add_value;
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}
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void os::fence_bootstrap() {
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// try to use the stub:
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fence_func_t* func = CAST_TO_FN_PTR(fence_func_t*, StubRoutines::fence_entry());
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if (func != NULL) {
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os::fence_func = func;
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(*func)();
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return;
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}
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assert(Threads::number_of_threads() == 0, "for bootstrap only");
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// don't have to do anything for a single thread
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}
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xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap;
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xchg_ptr_func_t* os::atomic_xchg_ptr_func = os::atomic_xchg_ptr_bootstrap;
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cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap;
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add_func_t* os::atomic_add_func = os::atomic_add_bootstrap;
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add_ptr_func_t* os::atomic_add_ptr_func = os::atomic_add_ptr_bootstrap;
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fence_func_t* os::fence_func = os::fence_bootstrap;
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#endif // AMD64
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cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap;
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ExtendedPC os::fetch_frame_from_context(void* ucVoid,
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intptr_t** ret_sp, intptr_t** ret_fp) {
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ExtendedPC epc;
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CONTEXT* uc = (CONTEXT*)ucVoid;
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if (uc != NULL) {
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epc = ExtendedPC((address)uc->REG_PC);
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if (ret_sp) *ret_sp = (intptr_t*)uc->REG_SP;
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if (ret_fp) *ret_fp = (intptr_t*)uc->REG_FP;
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} else {
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// construct empty ExtendedPC for return value checking
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epc = ExtendedPC(NULL);
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if (ret_sp) *ret_sp = (intptr_t *)NULL;
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if (ret_fp) *ret_fp = (intptr_t *)NULL;
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}
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return epc;
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}
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frame os::fetch_frame_from_context(void* ucVoid) {
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intptr_t* sp;
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intptr_t* fp;
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ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
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return frame(sp, fp, epc.pc());
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}
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// VC++ does not save frame pointer on stack in optimized build. It
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// can be turned off by /Oy-. If we really want to walk C frames,
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// we can use the StackWalk() API.
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frame os::get_sender_for_C_frame(frame* fr) {
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return frame(fr->sender_sp(), fr->link(), fr->sender_pc());
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}
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#ifndef AMD64
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intptr_t* _get_previous_fp() {
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intptr_t **frameptr;
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__asm {
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mov frameptr, ebp
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};
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return *frameptr;
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}
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#endif // !AMD64
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frame os::current_frame() {
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#ifdef AMD64
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// apparently _asm not supported on windows amd64
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typedef intptr_t* get_fp_func ();
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get_fp_func* func = CAST_TO_FN_PTR(get_fp_func*,
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StubRoutines::amd64::get_previous_fp_entry());
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if (func == NULL) return frame(NULL, NULL, NULL);
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intptr_t* fp = (*func)();
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#else
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intptr_t* fp = _get_previous_fp();
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#endif // AMD64
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frame myframe((intptr_t*)os::current_stack_pointer(),
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(intptr_t*)fp,
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CAST_FROM_FN_PTR(address, os::current_frame));
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if (os::is_first_C_frame(&myframe)) {
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// stack is not walkable
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return frame(NULL, NULL, NULL);
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} else {
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return os::get_sender_for_C_frame(&myframe);
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}
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}
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void os::print_context(outputStream *st, void *context) {
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if (context == NULL) return;
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CONTEXT* uc = (CONTEXT*)context;
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st->print_cr("Registers:");
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#ifdef AMD64
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st->print( "EAX=" INTPTR_FORMAT, uc->Rax);
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398 |
st->print(", EBX=" INTPTR_FORMAT, uc->Rbx);
|
|
399 |
st->print(", ECX=" INTPTR_FORMAT, uc->Rcx);
|
|
400 |
st->print(", EDX=" INTPTR_FORMAT, uc->Rdx);
|
|
401 |
st->cr();
|
|
402 |
st->print( "ESP=" INTPTR_FORMAT, uc->Rsp);
|
|
403 |
st->print(", EBP=" INTPTR_FORMAT, uc->Rbp);
|
|
404 |
st->print(", ESI=" INTPTR_FORMAT, uc->Rsi);
|
|
405 |
st->print(", EDI=" INTPTR_FORMAT, uc->Rdi);
|
|
406 |
st->cr();
|
|
407 |
st->print( "EIP=" INTPTR_FORMAT, uc->Rip);
|
|
408 |
st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags);
|
|
409 |
#else
|
|
410 |
st->print( "EAX=" INTPTR_FORMAT, uc->Eax);
|
|
411 |
st->print(", EBX=" INTPTR_FORMAT, uc->Ebx);
|
|
412 |
st->print(", ECX=" INTPTR_FORMAT, uc->Ecx);
|
|
413 |
st->print(", EDX=" INTPTR_FORMAT, uc->Edx);
|
|
414 |
st->cr();
|
|
415 |
st->print( "ESP=" INTPTR_FORMAT, uc->Esp);
|
|
416 |
st->print(", EBP=" INTPTR_FORMAT, uc->Ebp);
|
|
417 |
st->print(", ESI=" INTPTR_FORMAT, uc->Esi);
|
|
418 |
st->print(", EDI=" INTPTR_FORMAT, uc->Edi);
|
|
419 |
st->cr();
|
|
420 |
st->print( "EIP=" INTPTR_FORMAT, uc->Eip);
|
|
421 |
st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags);
|
|
422 |
#endif // AMD64
|
|
423 |
st->cr();
|
|
424 |
st->cr();
|
|
425 |
|
|
426 |
intptr_t *sp = (intptr_t *)uc->REG_SP;
|
|
427 |
st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
|
|
428 |
print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t));
|
|
429 |
st->cr();
|
|
430 |
|
|
431 |
// Note: it may be unsafe to inspect memory near pc. For example, pc may
|
|
432 |
// point to garbage if entry point in an nmethod is corrupted. Leave
|
|
433 |
// this at the end, and hope for the best.
|
|
434 |
address pc = (address)uc->REG_PC;
|
|
435 |
st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
|
|
436 |
print_hex_dump(st, pc - 16, pc + 16, sizeof(char));
|
|
437 |
st->cr();
|
|
438 |
}
|
|
439 |
|
|
440 |
extern "C" int SafeFetch32 (int * adr, int Err) {
|
|
441 |
int rv = Err ;
|
|
442 |
_try {
|
|
443 |
rv = *((volatile int *) adr) ;
|
|
444 |
} __except(EXCEPTION_EXECUTE_HANDLER) {
|
|
445 |
}
|
|
446 |
return rv ;
|
|
447 |
}
|
|
448 |
|
|
449 |
extern "C" intptr_t SafeFetchN (intptr_t * adr, intptr_t Err) {
|
|
450 |
intptr_t rv = Err ;
|
|
451 |
_try {
|
|
452 |
rv = *((volatile intptr_t *) adr) ;
|
|
453 |
} __except(EXCEPTION_EXECUTE_HANDLER) {
|
|
454 |
}
|
|
455 |
return rv ;
|
|
456 |
}
|
|
457 |
|
|
458 |
extern "C" int SpinPause () {
|
|
459 |
#ifdef AMD64
|
|
460 |
return 0 ;
|
|
461 |
#else
|
|
462 |
// pause == rep:nop
|
|
463 |
// On systems that don't support pause a rep:nop
|
|
464 |
// is executed as a nop. The rep: prefix is ignored.
|
|
465 |
_asm {
|
|
466 |
pause ;
|
|
467 |
};
|
|
468 |
return 1 ;
|
|
469 |
#endif // AMD64
|
|
470 |
}
|
|
471 |
|
|
472 |
|
|
473 |
void os::setup_fpu() {
|
|
474 |
#ifndef AMD64
|
|
475 |
int fpu_cntrl_word = StubRoutines::fpu_cntrl_wrd_std();
|
|
476 |
__asm fldcw fpu_cntrl_word;
|
|
477 |
#endif // !AMD64
|
|
478 |
}
|