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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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 #define NULL_WORD NULL
78
79 // AIX also needs a 64 bit NULL to work as a null address pointer.
80 // Most system includes on AIX would define it as an int 0 if not already defined with one
81 // exception: /usr/include/dirent.h will unconditionally redefine NULL to int 0 again.
82 // In this case you need to copy the following defines to a position after #include <dirent.h>
83 // (see jmv_aix.h).
84 #ifdef AIX
85 #include <dirent.h>
86 #ifdef _LP64
87 #undef NULL
88 #define NULL 0L
89 #else
90 #ifndef NULL
91 #define NULL 0
92 #endif
93 #endif
94 #endif // AIX
95
96 // Compiler-specific primitive types
97 // All defs of int (uint16_6 etc) are defined in AIX' /usr/include/stdint.h
98
99 // Additional Java basic types
100
101 typedef uint8_t jubyte;
102 typedef uint16_t jushort;
103 typedef uint32_t juint;
104 typedef uint64_t julong;
105
106 // checking for nanness
107 #ifdef AIX
108 inline int g_isnan(float f) { return isnan(f); }
109 inline int g_isnan(double f) { return isnan(f); }
110 #else
111 #error "missing platform-specific definition here"
112 #endif
113
114 // Checking for finiteness
115
116 inline int g_isfinite(jfloat f) { return finite(f); }
117 inline int g_isfinite(jdouble f) { return finite(f); }
118
119
120 // Wide characters
121
122 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }
123
124
125 // Formatting.
126 #ifdef _LP64
127 #define FORMAT64_MODIFIER "l"
128 #else // !_LP64
129 #define FORMAT64_MODIFIER "ll"
130 #endif // _LP64
131
132 // Cannot use xlc's offsetof as implementation of hotspot's
133 // offset_of(), because xlc warns about applying offsetof() to non-POD
134 // object and xlc cannot compile the expression offsetof(DataLayout,
135 // _cells[index]) in DataLayout::cell_offset() . Therefore we define
136 // offset_of as it is defined for gcc.
137 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16)
138
139 // AIX 5.3 has buggy __thread support. (see JDK-8176442).
140 #define USE_LIBRARY_BASED_TLS_ONLY 1
141
142 #ifndef USE_LIBRARY_BASED_TLS_ONLY
143 #define THREAD_LOCAL_DECL __thread
144 #endif
145
146 // Inlining support
147 //
148 // Be aware that for function/method declarations, xlC only supports the following
149 // syntax (i.e. the attribute must be placed AFTER the function/method declarator):
150 //
151 // void* operator new(size_t size) throw() NOINLINE;
152 //
153 // For function/method defintions, the more common placement BEFORE the
154 // function/method declarator seems to be supported as well:
155 //
156 // NOINLINE void* CHeapObj<F>::operator new(size_t size) throw() {...}
157
158 #define NOINLINE __attribute__((__noinline__))
159 #define ALWAYSINLINE inline __attribute__((__always_inline__))
160
161 #endif // SHARE_UTILITIES_GLOBALDEFINITIONS_XLC_HPP