1 /* 2 * Copyright (c) 1998, 2019, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2017 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 22 * questions. 23 * 24 */ 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 // Use XLC compiler builtins instead of inline assembler 55 #define USE_XLC_BUILTINS 56 #ifdef USE_XLC_BUILTINS 57 #include <builtins.h> 58 #if __IBMCPP__ < 1000 59 // the funtion prototype for __dcbtst(void *) is missing in XLC V8.0 60 // I could compile a little test, where I provided the prototype. 61 // The generated code was correct there. This is the prototype: 62 // extern "builtin" void __dcbtst (void *); 63 // For now we don't make use of it when compiling with XLC V8.0 64 #else 65 // __IBMCPP__ >= 1000 66 // XLC V10 provides the prototype for __dcbtst (void *); 67 #define USE_XLC_PREFETCH_WRITE_BUILTIN 68 #endif 69 #endif // USE_XLC_BUILTINS 70 71 // NULL vs NULL_WORD: 72 // On Linux NULL is defined as a special type '__null'. Assigning __null to 73 // integer variable will cause gcc warning. Use NULL_WORD in places where a 74 // pointer is stored as integer value. On some platforms, sizeof(intptr_t) > 75 // sizeof(void*), so here we want something which is integer type, but has the 76 // same size as a pointer. 77 #ifdef __GNUC__ 78 #error XLC and __GNUC__? 79 #else 80 #define NULL_WORD NULL 81 #endif 82 83 // AIX also needs a 64 bit NULL to work as a null address pointer. 84 // Most system includes on AIX would define it as an int 0 if not already defined with one 85 // exception: /usr/include/dirent.h will unconditionally redefine NULL to int 0 again. 86 // In this case you need to copy the following defines to a position after #include <dirent.h> 87 // (see jmv_aix.h). 88 #ifdef AIX 89 #include <dirent.h> 90 #ifdef _LP64 91 #undef NULL 92 #define NULL 0L 93 #else 94 #ifndef NULL 95 #define NULL 0 96 #endif 97 #endif 98 #endif // AIX 99 100 // Compiler-specific primitive types 101 // All defs of int (uint16_6 etc) are defined in AIX' /usr/include/stdint.h 102 103 // Additional Java basic types 104 105 typedef uint8_t jubyte; 106 typedef uint16_t jushort; 107 typedef uint32_t juint; 108 typedef uint64_t julong; 109 110 // checking for nanness 111 #ifdef AIX 112 inline int g_isnan(float f) { return isnan(f); } 113 inline int g_isnan(double f) { return isnan(f); } 114 #else 115 #error "missing platform-specific definition here" 116 #endif 117 118 // Checking for finiteness 119 120 inline int g_isfinite(jfloat f) { return finite(f); } 121 inline int g_isfinite(jdouble f) { return finite(f); } 122 123 124 // Wide characters 125 126 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); } 127 128 129 // Formatting. 130 #ifdef _LP64 131 #define FORMAT64_MODIFIER "l" 132 #else // !_LP64 133 #define FORMAT64_MODIFIER "ll" 134 #endif // _LP64 135 136 // Cannot use xlc's offsetof as implementation of hotspot's 137 // offset_of(), because xlc warns about applying offsetof() to non-POD 138 // object and xlc cannot compile the expression offsetof(DataLayout, 139 // _cells[index]) in DataLayout::cell_offset() . Therefore we define 140 // offset_of as it is defined for gcc. 141 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16) 142 143 // AIX 5.3 has buggy __thread support. (see JDK-8176442). 144 #define USE_LIBRARY_BASED_TLS_ONLY 1 145 146 #ifndef USE_LIBRARY_BASED_TLS_ONLY 147 #define THREAD_LOCAL_DECL __thread 148 #endif 149 150 // Inlining support 151 // 152 // Be aware that for function/method declarations, xlC only supports the following 153 // syntax (i.e. the attribute must be placed AFTER the function/method declarator): 154 // 155 // void* operator new(size_t size) throw() NOINLINE; 156 // 157 // For function/method defintions, the more common placement BEFORE the 158 // function/method declarator seems to be supported as well: 159 // 160 // NOINLINE void* CHeapObj<F>::operator new(size_t size) throw() {...} 161 162 #define NOINLINE __attribute__((__noinline__)) 163 #define ALWAYSINLINE inline __attribute__((__always_inline__)) 164 165 #endif // SHARE_UTILITIES_GLOBALDEFINITIONS_XLC_HPP