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 /*

  * Copyright (c) 1998, 2011, 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.

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  */

 #ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_GCC_HPP

 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_GCC_HPP

 #include "prims/jni.h"

 // This file holds compiler-dependent includes,

 // globally used constants & types, class (forward)

 // declarations and a few frequently used utility functions.

 #include <ctype.h>

 #include <string.h>

 #include <stdarg.h>

 #include <stddef.h>

 #include <stdio.h>

 #include <stdlib.h>

 #include <wchar.h>

 #ifdef SOLARIS

 #include <ieeefp.h>

 #endif // SOLARIS

 #include <math.h>

 #ifndef FP_PZERO

 // Linux doesn't have positive/negative zero

 #define FP_PZERO FP_ZERO

 #endif

 #if (!defined fpclass) && ((!defined SPARC) || (!defined SOLARIS))

 #define fpclass fpclassify

 #endif

 #include <time.h>

 #include <fcntl.h>

 #include <dlfcn.h>

 #include <pthread.h>

 #ifdef SOLARIS

 #include <thread.h>

 #endif // SOLARIS

 #include <limits.h>

 #include <errno.h>

 #ifdef SOLARIS

 #include <sys/trap.h>

 #include <sys/regset.h>

 #include <sys/procset.h>

 #include <ucontext.h>

 #include <setjmp.h>

 #endif // SOLARIS

 # ifdef SOLARIS_MUTATOR_LIBTHREAD

 # include <sys/procfs.h>

 # endif

 #ifdef LINUX

 #ifndef __STDC_LIMIT_MACROS

 #define __STDC_LIMIT_MACROS

 #endif // __STDC_LIMIT_MACROS

 #include <inttypes.h>

 #include <signal.h>

 #include <ucontext.h>

 #include <sys/time.h>

 #endif // LINUX

 // 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures

 // When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in

 // system header files.  On 32-bit architectures, there is no problem.

 // On 64-bit architectures, defining NULL as a 32-bit constant can cause

 // problems with varargs functions: C++ integral promotion rules say for

 // varargs, we pass the argument 0 as an int.  So, if NULL was passed to a

 // varargs function it will remain 32-bits.  Depending on the calling

 // convention of the machine, if the argument is passed on the stack then

 // only 32-bits of the "NULL" pointer may be initialized to zero.  The

 // other 32-bits will be garbage.  If the varargs function is expecting a

 // pointer when it extracts the argument, then we have a problem.

 //

 // Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0.

 //

 // Note: this fix doesn't work well on Linux because NULL will be overwritten

 // whenever a system header file is included. Linux handles NULL correctly

 // through a special type '__null'.

 #ifdef SOLARIS

   #ifdef _LP64

     #undef NULL

     #define NULL 0L

   #else

     #ifndef NULL

       #define NULL 0

     #endif

   #endif

 #endif

 // NULL vs NULL_WORD:

 // On Linux NULL is defined as a special type '__null'. Assigning __null to

 // integer variable will cause gcc warning. Use NULL_WORD in places where a

 // pointer is stored as integer value.  On some platforms, sizeof(intptr_t) >

 // sizeof(void*), so here we want something which is integer type, but has the

 // same size as a pointer.

 #ifdef LINUX

   #ifdef _LP64

     #define NULL_WORD  0L

   #else

     // Cast 0 to intptr_t rather than int32_t since they are not the same type

     // on platforms such as Mac OS X.

     #define NULL_WORD  ((intptr_t)0)

   #endif

 #else

   #define NULL_WORD  NULL

 #endif

 #ifndef LINUX

 // Compiler-specific primitive types

 typedef unsigned short     uint16_t;

 #ifndef _UINT32_T

 #define _UINT32_T

 typedef unsigned int       uint32_t;

 #endif // _UINT32_T

 #if !defined(_SYS_INT_TYPES_H)

 #ifndef _UINT64_T

 #define _UINT64_T

 typedef unsigned long long uint64_t;

 #endif // _UINT64_T

 // %%%% how to access definition of intptr_t portably in 5.5 onward?

 typedef int                     intptr_t;

 typedef unsigned int            uintptr_t;

 // If this gets an error, figure out a symbol XXX that implies the

 // prior definition of intptr_t, and add "&& !defined(XXX)" above.

 #endif // _SYS_INT_TYPES_H

 #endif // !LINUX

 // Additional Java basic types

 typedef uint8_t  jubyte;

 typedef uint16_t jushort;

 typedef uint32_t juint;

 typedef uint64_t julong;

 //----------------------------------------------------------------------------------------------------

 // Special (possibly not-portable) casts

 // Cast floats into same-size integers and vice-versa w/o changing bit-pattern

 // %%%%%% These seem like standard C++ to me--how about factoring them out? - Ungar

 inline jint    jint_cast   (jfloat  x)           { return *(jint*   )&x; }

 inline jlong   jlong_cast  (jdouble x)           { return *(jlong*  )&x; }

 inline jfloat  jfloat_cast (jint    x)           { return *(jfloat* )&x; }

 inline jdouble jdouble_cast(jlong   x)           { return *(jdouble*)&x; }

 //----------------------------------------------------------------------------------------------------

 // Constant for jlong (specifying an long long canstant is C++ compiler specific)

 // Build a 64bit integer constant

 #define CONST64(x)  (x ## LL)

 #define UCONST64(x) (x ## ULL)

 const jlong min_jlong = CONST64(0x8000000000000000);

 const jlong max_jlong = CONST64(0x7fffffffffffffff);

 #ifdef SOLARIS

 //----------------------------------------------------------------------------------------------------

 // ANSI C++ fixes

 // NOTE:In the ANSI committee's continuing attempt to make each version

 // of C++ incompatible with the previous version, you can no longer cast

 // pointers to functions without specifying linkage unless you want to get

 // warnings.

 //

 // This also means that pointers to functions can no longer be "hidden"

 // in opaque types like void * because at the invokation point warnings

 // will be generated. While this makes perfect sense from a type safety

 // point of view it causes a lot of warnings on old code using C header

 // files. Here are some typedefs to make the job of silencing warnings

 // a bit easier.

 //

 // The final kick in the teeth is that you can only have extern "C" linkage

 // specified at file scope. So these typedefs are here rather than in the

 // .hpp for the class (os:Solaris usually) that needs them.

 extern "C" {

    typedef int (*int_fnP_thread_t_iP_uP_stack_tP_gregset_t)(thread_t, int*, unsigned *, stack_t*, gregset_t);

    typedef int (*int_fnP_thread_t_i_gregset_t)(thread_t, int, gregset_t);

    typedef int (*int_fnP_thread_t_i)(thread_t, int);

    typedef int (*int_fnP_thread_t)(thread_t);

    typedef int (*int_fnP_cond_tP_mutex_tP_timestruc_tP)(cond_t *cv, mutex_t *mx, timestruc_t *abst);

    typedef int (*int_fnP_cond_tP_mutex_tP)(cond_t *cv, mutex_t *mx);

    // typedef for missing API in libc

    typedef int (*int_fnP_mutex_tP_i_vP)(mutex_t *, int, void *);

    typedef int (*int_fnP_mutex_tP)(mutex_t *);

    typedef int (*int_fnP_cond_tP_i_vP)(cond_t *cv, int scope, void *arg);

    typedef int (*int_fnP_cond_tP)(cond_t *cv);

 };

 #endif // SOLARIS

 //----------------------------------------------------------------------------------------------------

 // Debugging

 #define DEBUG_EXCEPTION ::abort();

 #ifdef ARM

 #ifdef SOLARIS

 #define BREAKPOINT __asm__ volatile (".long 0xe1200070")

 #else

 #define BREAKPOINT __asm__ volatile (".long 0xe7f001f0")

 #endif

 #else

 extern "C" void breakpoint();

 #define BREAKPOINT ::breakpoint()

 #endif

 // checking for nanness

 #ifdef SOLARIS

 #ifdef SPARC

 inline int g_isnan(float  f) { return isnanf(f); }

 #else

 // isnanf() broken on Intel Solaris use isnand()

 inline int g_isnan(float  f) { return isnand(f); }

 #endif

 inline int g_isnan(double f) { return isnand(f); }

 #elif LINUX

 inline int g_isnan(float  f) { return isnanf(f); }

 inline int g_isnan(double f) { return isnan(f); }

 #else

 #error "missing platform-specific definition here"

 #endif

 // GCC 4.3 does not allow 0.0/0.0 to produce a NAN value

 #if (__GNUC__ == 4) && (__GNUC_MINOR__ > 2)

 #define CAN_USE_NAN_DEFINE 1

 #endif

 // Checking for finiteness

 inline int g_isfinite(jfloat  f)                 { return finite(f); }

 inline int g_isfinite(jdouble f)                 { return finite(f); }

 // Wide characters

 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }

 // Portability macros

 #define PRAGMA_INTERFACE             #pragma interface

 #define PRAGMA_IMPLEMENTATION        #pragma implementation

 #define VALUE_OBJ_CLASS_SPEC

 #if (__GNUC__ == 2) && (__GNUC_MINOR__ < 95)

 #define TEMPLATE_TABLE_BUG

 #endif

 #if (__GNUC__ == 2) && (__GNUC_MINOR__ >= 96)

 #define CONST_SDM_BUG

 #endif

 // Formatting.

 #ifdef _LP64

 #define FORMAT64_MODIFIER "l"

 #else // !_LP64

 #define FORMAT64_MODIFIER "ll"

 #endif // _LP64

 // HACK: gcc warns about applying offsetof() to non-POD object or calculating

 //       offset directly when base address is NULL. Use 16 to get around the

 //       warning. gcc-3.4 has an option -Wno-invalid-offsetof to suppress

 //       this warning.

 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16)

 #ifdef offsetof

 # undef offsetof

 #endif

 #define offsetof(klass,field) offset_of(klass,field)

 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_GCC_HPP