hotspot/src/share/vm/utilities/globalDefinitions_visCPP.hpp
author mgerdin
Thu, 23 Feb 2012 14:58:35 +0100
changeset 12095 cc3d6f08a4c4
parent 11596 3b9802e6c6a2
child 12941 a4a325a315c1
permissions -rw-r--r--
7148152: Add whitebox testing API to HotSpot Summary: Add an internal testing API to HotSpot to enable more targeted testing of vm functionality Reviewed-by: phh, dholmes
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/*
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 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_VISCPP_HPP
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#define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_VISCPP_HPP
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#include "prims/jni.h"
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// This file holds compiler-dependent includes,
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// globally used constants & types, class (forward)
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// declarations and a few frequently used utility functions.
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# include <ctype.h>
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# include <string.h>
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# include <stdarg.h>
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# include <stdlib.h>
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# include <stddef.h>// for offsetof
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# include <io.h>    // for stream.cpp
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# include <float.h> // for _isnan
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# include <stdio.h> // for va_list
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# include <time.h>
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# include <fcntl.h>
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# include <limits.h>
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// Need this on windows to get the math constants (e.g., M_PI).
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#define _USE_MATH_DEFINES
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# include <math.h>
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// 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures
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// When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in
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// system header files.  On 32-bit architectures, there is no problem.
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// On 64-bit architectures, defining NULL as a 32-bit constant can cause
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// problems with varargs functions: C++ integral promotion rules say for
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// varargs, we pass the argument 0 as an int.  So, if NULL was passed to a
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// varargs function it will remain 32-bits.  Depending on the calling
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// convention of the machine, if the argument is passed on the stack then
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// only 32-bits of the "NULL" pointer may be initialized to zero.  The
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// other 32-bits will be garbage.  If the varargs function is expecting a
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// pointer when it extracts the argument, then we may have a problem.
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//
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// Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0.
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#ifdef _LP64
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#undef NULL
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// 64-bit Windows uses a P64 data model (not LP64, although we define _LP64)
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// Since longs are 32-bit we cannot use 0L here.  Use the Visual C++ specific
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// 64-bit integer-suffix (i64) instead.
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#define NULL 0i64
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#else
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#ifndef NULL
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#define NULL 0
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#endif
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#endif
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// NULL vs NULL_WORD:
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// On Linux NULL is defined as a special type '__null'. Assigning __null to
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// integer variable will cause gcc warning. Use NULL_WORD in places where a
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// pointer is stored as integer value.
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#define NULL_WORD NULL
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// Compiler-specific primitive types
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typedef unsigned __int8  uint8_t;
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typedef unsigned __int16 uint16_t;
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typedef unsigned __int32 uint32_t;
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typedef unsigned __int64 uint64_t;
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#ifdef _WIN64
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typedef unsigned __int64 uintptr_t;
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#else
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typedef unsigned int uintptr_t;
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#endif
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typedef signed   __int8  int8_t;
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typedef signed   __int16 int16_t;
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typedef signed   __int32 int32_t;
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typedef signed   __int64 int64_t;
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#ifdef _WIN64
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typedef signed   __int64 intptr_t;
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typedef signed   __int64 ssize_t;
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#else
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typedef signed   int intptr_t;
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typedef signed   int ssize_t;
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#endif
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#ifndef UINTPTR_MAX
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#ifdef _WIN64
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#define UINTPTR_MAX _UI64_MAX
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#else
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#define UINTPTR_MAX _UI32_MAX
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#endif
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#endif
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//----------------------------------------------------------------------------------------------------
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// Additional Java basic types
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typedef unsigned char    jubyte;
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typedef unsigned short   jushort;
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typedef unsigned int     juint;
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typedef unsigned __int64 julong;
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//----------------------------------------------------------------------------------------------------
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// Special (possibly not-portable) casts
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// Cast floats into same-size integers and vice-versa w/o changing bit-pattern
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inline jint    jint_cast   (jfloat  x)           { return *(jint*   )&x; }
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inline jlong   jlong_cast  (jdouble x)           { return *(jlong*  )&x; }
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inline jfloat  jfloat_cast (jint    x)           { return *(jfloat* )&x; }
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inline jdouble jdouble_cast(jlong   x)           { return *(jdouble*)&x; }
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//----------------------------------------------------------------------------------------------------
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// Non-standard stdlib-like stuff:
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inline int strcasecmp(const char *s1, const char *s2) { return _stricmp(s1,s2); }
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inline int strncasecmp(const char *s1, const char *s2, size_t n) {
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  return _strnicmp(s1,s2,n);
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}
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//----------------------------------------------------------------------------------------------------
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// Debugging
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#if _WIN64
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extern "C" void breakpoint();
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#define BREAKPOINT ::breakpoint()
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#else
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#define BREAKPOINT __asm { int 3 }
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#endif
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//----------------------------------------------------------------------------------------------------
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// Checking for nanness
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inline int g_isnan(jfloat  f)                    { return _isnan(f); }
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inline int g_isnan(jdouble f)                    { return _isnan(f); }
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//----------------------------------------------------------------------------------------------------
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// Checking for finiteness
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inline int g_isfinite(jfloat  f)                 { return _finite(f); }
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inline int g_isfinite(jdouble f)                 { return _finite(f); }
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//----------------------------------------------------------------------------------------------------
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// Constant for jlong (specifying an long long constant is C++ compiler specific)
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// Build a 64bit integer constant on with Visual C++
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#define CONST64(x)  (x ## i64)
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#define UCONST64(x) ((uint64_t)CONST64(x))
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const jlong min_jlong = CONST64(0x8000000000000000);
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const jlong max_jlong = CONST64(0x7fffffffffffffff);
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//----------------------------------------------------------------------------------------------------
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// Miscellaneous
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// Visual Studio 2005 deprecates POSIX names - use ISO C++ names instead
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#if _MSC_VER >= 1400
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#define open _open
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#define close _close
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#define read  _read
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#define write _write
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#define lseek _lseek
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#define unlink _unlink
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#define strdup _strdup
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#endif
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#pragma warning( disable : 4100 ) // unreferenced formal parameter
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#pragma warning( disable : 4127 ) // conditional expression is constant
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#pragma warning( disable : 4514 ) // unreferenced inline function has been removed
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#pragma warning( disable : 4244 ) // possible loss of data
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#pragma warning( disable : 4512 ) // assignment operator could not be generated
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#pragma warning( disable : 4201 ) // nonstandard extension used : nameless struct/union (needed in windows.h)
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#pragma warning( disable : 4511 ) // copy constructor could not be generated
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#pragma warning( disable : 4291 ) // no matching operator delete found; memory will not be freed if initialization thows an exception
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#if _MSC_VER >= 1400
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#pragma warning( disable : 4996 ) // unsafe string functions. Same as define _CRT_SECURE_NO_WARNINGS/_CRT_SECURE_NO_DEPRICATE
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#endif
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inline int vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
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  // If number of characters written == count, Windows doesn't write a
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  // terminating NULL, so we do it ourselves.
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  int ret = _vsnprintf(buf, count, fmt, argptr);
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  if (count > 0) buf[count-1] = '\0';
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  return ret;
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}
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// Portability macros
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#define PRAGMA_INTERFACE
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#define PRAGMA_IMPLEMENTATION
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#define PRAGMA_IMPLEMENTATION_(arg)
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#define VALUE_OBJ_CLASS_SPEC    : public _ValueObj
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// Formatting.
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#define FORMAT64_MODIFIER "I64"
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// Visual Studio doesn't provide inttypes.h so provide appropriate definitions here.
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// The 32 bits ones might need I32 but seem to work ok without it.
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#define PRId32       "d"
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#define PRIu32       "u"
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#define PRIx32       "x"
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#define PRId64       "I64d"
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#define PRIu64       "I64u"
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#define PRIx64       "I64x"
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#define PRIdPTR       "d"
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#define PRIuPTR       "u"
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#define PRIxPTR       "x"
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#define offset_of(klass,field) offsetof(klass,field)
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#endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_VISCPP_HPP