1 /*
   2  * Copyright (c) 1998, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2012, 2019 SAP SE. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
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  25 
  26 #ifndef SHARE_UTILITIES_GLOBALDEFINITIONS_XLC_HPP
  27 #define SHARE_UTILITIES_GLOBALDEFINITIONS_XLC_HPP
  28 
  29 #include "jni.h"
  30 
  31 // This file holds compiler-dependent includes,
  32 // globally used constants & types, class (forward)
  33 // declarations and a few frequently used utility functions.
  34 
  35 #include <ctype.h>
  36 #include <string.h>
  37 #include <stdarg.h>
  38 #include <stddef.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <wchar.h>
  42 
  43 #include <math.h>
  44 #include <time.h>
  45 #include <fcntl.h>
  46 #include <dlfcn.h>
  47 #include <pthread.h>
  48 
  49 #include <limits.h>
  50 #include <errno.h>
  51 
  52 #include <stdint.h>
  53 
  54 // check for xlc16 or higher
  55 #ifdef __ibmxl_version__
  56   #if __ibmxl_version__ < 16
  57   #error "xlc < 16 not supported"
  58   #endif
  59 #else
  60   #error "xlc < 16 not supported, macro __ibmxl_version__ not found"
  61 #endif
  62 
  63 #ifndef _AIX
  64 #error "missing AIX-specific definition _AIX"
  65 #endif
  66 
  67 // Use XLC compiler builtins instead of inline assembler
  68 #define USE_XLC_BUILTINS
  69 
  70 #ifdef USE_XLC_BUILTINS
  71 #include <builtins.h>
  72 // XLC V10 and higher provide the prototype for __dcbtst (void *);
  73 #endif // USE_XLC_BUILTINS
  74 
  75 // NULL vs NULL_WORD:
  76 // Some platform/tool-chain combinations can't assign NULL to an integer
  77 // type so we define NULL_WORD to use in those contexts. For xlc they are the same.
  78 #define NULL_WORD  NULL
  79 
  80 // AIX also needs a 64 bit NULL to work as a null address pointer.
  81 // Most system includes on AIX would define it as an int 0 if not already defined with one
  82 // exception: /usr/include/dirent.h will unconditionally redefine NULL to int 0 again.
  83 // In this case you need to copy the following defines to a position after #include <dirent.h>
  84 #include <dirent.h>
  85 #ifdef _LP64
  86   #undef NULL
  87   #define NULL 0L
  88 #else
  89   #ifndef NULL
  90     #define NULL 0
  91   #endif
  92 #endif
  93 
  94 // Compiler-specific primitive types
  95 // All defs of int (uint16_6 etc) are defined in AIX' /usr/include/stdint.h
  96 
  97 // Additional Java basic types
  98 
  99 typedef uint8_t  jubyte;
 100 typedef uint16_t jushort;
 101 typedef uint32_t juint;
 102 typedef uint64_t julong;
 103 
 104 // checking for nanness
 105 inline int g_isnan(float  f) { return isnan(f); }
 106 inline int g_isnan(double f) { return isnan(f); }
 107 
 108 // Checking for finiteness
 109 inline int g_isfinite(jfloat  f)                 { return finite(f); }
 110 inline int g_isfinite(jdouble f)                 { return finite(f); }
 111 
 112 // Wide characters
 113 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }
 114 
 115 
 116 // Formatting.
 117 #ifdef _LP64
 118 #define FORMAT64_MODIFIER "l"
 119 #else // !_LP64
 120 #define FORMAT64_MODIFIER "ll"
 121 #endif // _LP64
 122 
 123 // Cannot use xlc's offsetof as implementation of hotspot's
 124 // offset_of(), because xlc warns about applying offsetof() to non-POD
 125 // object and xlc cannot compile the expression offsetof(DataLayout,
 126 // _cells[index]) in DataLayout::cell_offset() .  Therefore we define
 127 // offset_of as it is defined for gcc.
 128 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16)
 129 
 130 // AIX 5.3 has buggy __thread support. (see JDK-8176442).
 131 #define USE_LIBRARY_BASED_TLS_ONLY 1
 132 
 133 #ifndef USE_LIBRARY_BASED_TLS_ONLY
 134 #define THREAD_LOCAL_DECL __thread
 135 #endif
 136 
 137 // Inlining support
 138 //
 139 // Be aware that for function/method declarations, xlC only supports the following
 140 // syntax (i.e. the attribute must be placed AFTER the function/method declarator):
 141 //
 142 //   void* operator new(size_t size) throw() NOINLINE;
 143 //
 144 // For function/method defintions, the more common placement BEFORE the
 145 // function/method declarator seems to be supported as well:
 146 //
 147 //   NOINLINE void* CHeapObj<F>::operator new(size_t size) throw() {...}
 148 
 149 #define NOINLINE     __attribute__((__noinline__))
 150 #define ALWAYSINLINE inline __attribute__((__always_inline__))
 151 
 152 #endif // SHARE_UTILITIES_GLOBALDEFINITIONS_XLC_HPP