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
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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 #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