1 /*
  2  * Copyright (c) 1998, 2020, Oracle and/or its affiliates. All rights reserved.
  3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  4  *
  5  * This code is free software; you can redistribute it and/or modify it
  6  * under the terms of the GNU General Public License version 2 only, as
  7  * published by the Free Software Foundation.
  8  *
  9  * This code is distributed in the hope that it will be useful, but WITHOUT
 10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 12  * version 2 for more details (a copy is included in the LICENSE file that
 13  * accompanied this code).
 14  *
 15  * You should have received a copy of the GNU General Public License version
 16  * 2 along with this work; if not, write to the Free Software Foundation,
 17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 18  *
 19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 20  * or visit www.oracle.com if you need additional information or have any
 21  * questions.
 22  *
 23  */
 24 
 25 #ifndef SHARE_UTILITIES_GLOBALDEFINITIONS_GCC_HPP
 26 #define SHARE_UTILITIES_GLOBALDEFINITIONS_GCC_HPP
 27 
 28 #include "jni.h"
 29 
 30 // This file holds compiler-dependent includes,
 31 // globally used constants & types, class (forward)
 32 // declarations and a few frequently used utility functions.
 33 
 34 #include <ctype.h>
 35 #include <string.h>
 36 #include <stdarg.h>
 37 #include <stddef.h>
 38 #include <stdio.h>
 39 #include <stdlib.h>
 40 #include <wchar.h>
 41 
 42 #include <math.h>
 43 #include <time.h>
 44 #include <fcntl.h>
 45 #include <dlfcn.h>
 46 #include <pthread.h>
 47 
 48 #include <limits.h>
 49 #include <errno.h>
 50 
 51 #if defined(LINUX) || defined(_ALLBSD_SOURCE)
 52 #include <inttypes.h>
 53 #include <signal.h>
 54 #ifndef __OpenBSD__
 55 #include <ucontext.h>
 56 #endif
 57 #ifdef __APPLE__
 58   #include <AvailabilityMacros.h>
 59   #include <mach/mach.h>
 60 #endif
 61 #include <sys/time.h>
 62 #endif // LINUX || _ALLBSD_SOURCE
 63 
 64 // NULL vs NULL_WORD:
 65 // On Linux NULL is defined as a special type '__null'. Assigning __null to
 66 // integer variable will cause gcc warning. Use NULL_WORD in places where a
 67 // pointer is stored as integer value.  On some platforms, sizeof(intptr_t) >
 68 // sizeof(void*), so here we want something which is integer type, but has the
 69 // same size as a pointer.
 70 #ifdef __GNUC__
 71   #ifdef _LP64
 72     #define NULL_WORD  0L
 73   #else
 74     // Cast 0 to intptr_t rather than int32_t since they are not the same type
 75     // on platforms such as Mac OS X.
 76     #define NULL_WORD  ((intptr_t)0)
 77   #endif
 78 #else
 79   #define NULL_WORD  NULL
 80 #endif
 81 
 82 #if !defined(LINUX) && !defined(_ALLBSD_SOURCE)
 83 // Compiler-specific primitive types
 84 typedef unsigned short     uint16_t;
 85 #ifndef _UINT32_T
 86 #define _UINT32_T
 87 typedef unsigned int       uint32_t;
 88 #endif // _UINT32_T
 89 
 90 #if !defined(_SYS_INT_TYPES_H)
 91 #ifndef _UINT64_T
 92 #define _UINT64_T
 93 typedef unsigned long long uint64_t;
 94 #endif // _UINT64_T
 95 // %%%% how to access definition of intptr_t portably in 5.5 onward?
 96 typedef int                     intptr_t;
 97 typedef unsigned int            uintptr_t;
 98 // If this gets an error, figure out a symbol XXX that implies the
 99 // prior definition of intptr_t, and add "&& !defined(XXX)" above.
100 #endif // _SYS_INT_TYPES_H
101 
102 #endif // !LINUX && !_ALLBSD_SOURCE
103 
104 // Additional Java basic types
105 
106 typedef uint8_t  jubyte;
107 typedef uint16_t jushort;
108 typedef uint32_t juint;
109 typedef uint64_t julong;
110 
111 // checking for nanness
112 #if defined(__APPLE__)
113 inline int g_isnan(double f) { return isnan(f); }
114 #elif defined(LINUX) || defined(_ALLBSD_SOURCE)
115 inline int g_isnan(float  f) { return isnan(f); }
116 inline int g_isnan(double f) { return isnan(f); }
117 #else
118 #error "missing platform-specific definition here"
119 #endif
120 
121 #define CAN_USE_NAN_DEFINE 1
122 
123 
124 // Checking for finiteness
125 
126 inline int g_isfinite(jfloat  f)                 { return isfinite(f); }
127 inline int g_isfinite(jdouble f)                 { return isfinite(f); }
128 
129 
130 // Wide characters
131 
132 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }
133 
134 
135 // Formatting.
136 #ifdef _LP64
137 # ifdef __APPLE__
138 # define FORMAT64_MODIFIER "ll"
139 # else
140 # define FORMAT64_MODIFIER "l"
141 # endif
142 #else // !_LP64
143 #define FORMAT64_MODIFIER "ll"
144 #endif // _LP64
145 
146 // gcc warns about applying offsetof() to non-POD object or calculating
147 // offset directly when base address is NULL. Use 16 to get around the
148 // warning. The -Wno-invalid-offsetof option could be used to suppress
149 // this warning, but we instead just avoid the use of offsetof().
150 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16)
151 
152 #if defined(_LP64) && defined(__APPLE__)
153 #define JLONG_FORMAT          "%ld"
154 #define JLONG_FORMAT_W(width) "%" #width "ld"
155 #endif // _LP64 && __APPLE__
156 
157 #define THREAD_LOCAL __thread
158 
159 // Inlining support
160 #define NOINLINE     __attribute__ ((noinline))
161 #define ALWAYSINLINE inline __attribute__ ((always_inline))
162 #define ATTRIBUTE_FLATTEN __attribute__ ((flatten))
163 
164 // Alignment
165 //
166 #define ATTRIBUTE_ALIGNED(x) __attribute__((aligned(x)))
167 
168 #endif // SHARE_UTILITIES_GLOBALDEFINITIONS_GCC_HPP