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
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 // XLC V10 and higher provide the prototype for __dcbtst (void *);
59 #define USE_XLC_PREFETCH_WRITE_BUILTIN
60 #endif // USE_XLC_BUILTINS
61
62 // NULL vs NULL_WORD:
63 // Some platform/tool-chain combinations can't assign NULL to an integer
64 // type so we define NULL_WORD to use in those contexts. For xlc they are the same.
65 #define NULL_WORD NULL
66
67 // AIX also needs a 64 bit NULL to work as a null address pointer.
68 // Most system includes on AIX would define it as an int 0 if not already defined with one
69 // exception: /usr/include/dirent.h will unconditionally redefine NULL to int 0 again.
70 // In this case you need to copy the following defines to a position after #include <dirent.h>
71 // (see jmv_aix.h).
72 #ifdef AIX
73 #include <dirent.h>
74 #ifdef _LP64
75 #undef NULL
76 #define NULL 0L
77 #else
78 #ifndef NULL
79 #define NULL 0
80 #endif
81 #endif
82 #endif // AIX
83
84 // Compiler-specific primitive types
85 // All defs of int (uint16_6 etc) are defined in AIX' /usr/include/stdint.h
86
87 // Additional Java basic types
88
89 typedef uint8_t jubyte;
90 typedef uint16_t jushort;
91 typedef uint32_t juint;
92 typedef uint64_t julong;
93
94 // checking for nanness
95 #ifdef AIX
96 inline int g_isnan(float f) { return isnan(f); }
97 inline int g_isnan(double f) { return isnan(f); }
98 #else
99 #error "missing platform-specific definition here"
100 #endif
101
102 // Checking for finiteness
103
104 inline int g_isfinite(jfloat f) { return finite(f); }
105 inline int g_isfinite(jdouble f) { return finite(f); }
106
107
108 // Wide characters
109
110 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }
111
112
113 // Formatting.
114 #ifdef _LP64
115 #define FORMAT64_MODIFIER "l"
116 #else // !_LP64
117 #define FORMAT64_MODIFIER "ll"
118 #endif // _LP64
119
120 // Cannot use xlc's offsetof as implementation of hotspot's
121 // offset_of(), because xlc warns about applying offsetof() to non-POD
122 // object and xlc cannot compile the expression offsetof(DataLayout,
123 // _cells[index]) in DataLayout::cell_offset() . Therefore we define
124 // offset_of as it is defined for gcc.
125 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16)
126
127 // AIX 5.3 has buggy __thread support. (see JDK-8176442).
128 #define USE_LIBRARY_BASED_TLS_ONLY 1
129
130 #ifndef USE_LIBRARY_BASED_TLS_ONLY
131 #define THREAD_LOCAL_DECL __thread
132 #endif
133
134 // Inlining support
135 //
136 // Be aware that for function/method declarations, xlC only supports the following
137 // syntax (i.e. the attribute must be placed AFTER the function/method declarator):
138 //
139 // void* operator new(size_t size) throw() NOINLINE;
140 //
141 // For function/method defintions, the more common placement BEFORE the
142 // function/method declarator seems to be supported as well:
143 //
144 // NOINLINE void* CHeapObj<F>::operator new(size_t size) throw() {...}
145
146 #define NOINLINE __attribute__((__noinline__))
147 #define ALWAYSINLINE inline __attribute__((__always_inline__))
148
149 #endif // SHARE_UTILITIES_GLOBALDEFINITIONS_XLC_HPP