1 /*
2 * Copyright (c) 1998, 2010, 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_VM_UTILITIES_GLOBALDEFINITIONS_GCC_HPP
26 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_GCC_HPP
27
28 #include "prims/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 #ifdef SOLARIS
43 #include <ieeefp.h>
44 #endif // SOLARIS
45
46 #include <math.h>
47 #ifndef FP_PZERO
48 // Linux doesn't have positive/negative zero
49 #define FP_PZERO FP_ZERO
50 #endif
51 #if (!defined fpclass) && ((!defined SPARC) || (!defined SOLARIS))
52 #define fpclass fpclassify
53 #endif
54
55 #include <time.h>
56 #include <fcntl.h>
57 #include <dlfcn.h>
58 #include <pthread.h>
59
60 #ifdef SOLARIS
61 #include <thread.h>
62 #endif // SOLARIS
63
64 #include <limits.h>
65 #include <errno.h>
66
67 #ifdef SOLARIS
68 #include <sys/trap.h>
69 #include <sys/regset.h>
70 #include <sys/procset.h>
71 #include <ucontext.h>
72 #include <setjmp.h>
73 #endif // SOLARIS
74
75 # ifdef SOLARIS_MUTATOR_LIBTHREAD
76 # include <sys/procfs.h>
77 # endif
78
79 #ifdef LINUX
80 #define __STDC_LIMIT_MACROS
81 #include <inttypes.h>
82 #include <signal.h>
83 #include <ucontext.h>
84 #include <sys/time.h>
85 #endif // LINUX
86
87 // 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures
88 // When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in
89 // system header files. On 32-bit architectures, there is no problem.
90 // On 64-bit architectures, defining NULL as a 32-bit constant can cause
91 // problems with varargs functions: C++ integral promotion rules say for
92 // varargs, we pass the argument 0 as an int. So, if NULL was passed to a
93 // varargs function it will remain 32-bits. Depending on the calling
94 // convention of the machine, if the argument is passed on the stack then
95 // only 32-bits of the "NULL" pointer may be initialized to zero. The
96 // other 32-bits will be garbage. If the varargs function is expecting a
97 // pointer when it extracts the argument, then we have a problem.
98 //
99 // Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0.
100 //
101 // Note: this fix doesn't work well on Linux because NULL will be overwritten
102 // whenever a system header file is included. Linux handles NULL correctly
103 // through a special type '__null'.
104 #ifdef SOLARIS
105 #ifdef _LP64
106 #undef NULL
107 #define NULL 0L
108 #else
109 #ifndef NULL
110 #define NULL 0
111 #endif
112 #endif
113 #endif
114
115 // NULL vs NULL_WORD:
116 // On Linux NULL is defined as a special type '__null'. Assigning __null to
117 // integer variable will cause gcc warning. Use NULL_WORD in places where a
118 // pointer is stored as integer value. On some platforms, sizeof(intptr_t) >
119 // sizeof(void*), so here we want something which is integer type, but has the
120 // same size as a pointer.
121 #ifdef LINUX
122 #ifdef _LP64
123 #define NULL_WORD 0L
124 #else
125 // Cast 0 to intptr_t rather than int32_t since they are not the same type
126 // on platforms such as Mac OS X.
127 #define NULL_WORD ((intptr_t)0)
128 #endif
129 #else
130 #define NULL_WORD NULL
131 #endif
132
133 #ifndef LINUX
134 // Compiler-specific primitive types
135 typedef unsigned short uint16_t;
136 #ifndef _UINT32_T
137 #define _UINT32_T
138 typedef unsigned int uint32_t;
139 #endif // _UINT32_T
140
141 #if !defined(_SYS_INT_TYPES_H)
142 #ifndef _UINT64_T
143 #define _UINT64_T
144 typedef unsigned long long uint64_t;
145 #endif // _UINT64_T
146 // %%%% how to access definition of intptr_t portably in 5.5 onward?
147 typedef int intptr_t;
148 typedef unsigned int uintptr_t;
149 // If this gets an error, figure out a symbol XXX that implies the
150 // prior definition of intptr_t, and add "&& !defined(XXX)" above.
151 #endif // _SYS_INT_TYPES_H
152
153 #endif // !LINUX
154
155 // Additional Java basic types
156
157 typedef uint8_t jubyte;
158 typedef uint16_t jushort;
159 typedef uint32_t juint;
160 typedef uint64_t julong;
161
162 //----------------------------------------------------------------------------------------------------
163 // Special (possibly not-portable) casts
164 // Cast floats into same-size integers and vice-versa w/o changing bit-pattern
165 // %%%%%% These seem like standard C++ to me--how about factoring them out? - Ungar
166
167 inline jint jint_cast (jfloat x) { return *(jint* )&x; }
168 inline jlong jlong_cast (jdouble x) { return *(jlong* )&x; }
169
170 inline jfloat jfloat_cast (jint x) { return *(jfloat* )&x; }
171 inline jdouble jdouble_cast(jlong x) { return *(jdouble*)&x; }
172
173 //----------------------------------------------------------------------------------------------------
174 // Constant for jlong (specifying an long long canstant is C++ compiler specific)
175
176 // Build a 64bit integer constant
177 #define CONST64(x) (x ## LL)
178 #define UCONST64(x) (x ## ULL)
179
180 const jlong min_jlong = CONST64(0x8000000000000000);
181 const jlong max_jlong = CONST64(0x7fffffffffffffff);
182
183
184 #ifdef SOLARIS
185 //----------------------------------------------------------------------------------------------------
186 // ANSI C++ fixes
187 // NOTE:In the ANSI committee's continuing attempt to make each version
188 // of C++ incompatible with the previous version, you can no longer cast
189 // pointers to functions without specifying linkage unless you want to get
190 // warnings.
191 //
192 // This also means that pointers to functions can no longer be "hidden"
193 // in opaque types like void * because at the invokation point warnings
194 // will be generated. While this makes perfect sense from a type safety
195 // point of view it causes a lot of warnings on old code using C header
196 // files. Here are some typedefs to make the job of silencing warnings
197 // a bit easier.
198 //
199 // The final kick in the teeth is that you can only have extern "C" linkage
200 // specified at file scope. So these typedefs are here rather than in the
201 // .hpp for the class (os:Solaris usually) that needs them.
202
203 extern "C" {
204 typedef int (*int_fnP_thread_t_iP_uP_stack_tP_gregset_t)(thread_t, int*, unsigned *, stack_t*, gregset_t);
205 typedef int (*int_fnP_thread_t_i_gregset_t)(thread_t, int, gregset_t);
206 typedef int (*int_fnP_thread_t_i)(thread_t, int);
207 typedef int (*int_fnP_thread_t)(thread_t);
208
209 typedef int (*int_fnP_cond_tP_mutex_tP_timestruc_tP)(cond_t *cv, mutex_t *mx, timestruc_t *abst);
210 typedef int (*int_fnP_cond_tP_mutex_tP)(cond_t *cv, mutex_t *mx);
211
212 // typedef for missing API in libc
213 typedef int (*int_fnP_mutex_tP_i_vP)(mutex_t *, int, void *);
214 typedef int (*int_fnP_mutex_tP)(mutex_t *);
215 typedef int (*int_fnP_cond_tP_i_vP)(cond_t *cv, int scope, void *arg);
216 typedef int (*int_fnP_cond_tP)(cond_t *cv);
217 };
218 #endif // SOLARIS
219
220 //----------------------------------------------------------------------------------------------------
221 // Debugging
222
223 #define DEBUG_EXCEPTION ::abort();
224
225 #ifdef ARM
226 #ifdef SOLARIS
227 #define BREAKPOINT __asm__ volatile (".long 0xe1200070")
228 #else
229 #define BREAKPOINT __asm__ volatile (".long 0xe7f001f0")
230 #endif
231 #else
232 extern "C" void breakpoint();
233 #define BREAKPOINT ::breakpoint()
234 #endif
235
236 // checking for nanness
237 #ifdef SOLARIS
238 #ifdef SPARC
239 inline int g_isnan(float f) { return isnanf(f); }
240 #else
241 // isnanf() broken on Intel Solaris use isnand()
242 inline int g_isnan(float f) { return isnand(f); }
243 #endif
244 inline int g_isnan(double f) { return isnand(f); }
245 #elif LINUX
246 inline int g_isnan(float f) { return isnanf(f); }
247 inline int g_isnan(double f) { return isnan(f); }
248 #else
249 #error "missing platform-specific definition here"
250 #endif
251
252 // GCC 4.3 does not allow 0.0/0.0 to produce a NAN value
253 #if (__GNUC__ == 4) && (__GNUC_MINOR__ > 2)
254 #define CAN_USE_NAN_DEFINE 1
255 #endif
256
257
258 // Checking for finiteness
259
260 inline int g_isfinite(jfloat f) { return finite(f); }
261 inline int g_isfinite(jdouble f) { return finite(f); }
262
263
264 // Wide characters
265
266 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }
267
268
269 // Portability macros
270 #define PRAGMA_INTERFACE #pragma interface
271 #define PRAGMA_IMPLEMENTATION #pragma implementation
272 #define VALUE_OBJ_CLASS_SPEC
273
274 #if (__GNUC__ == 2) && (__GNUC_MINOR__ < 95)
275 #define TEMPLATE_TABLE_BUG
276 #endif
277 #if (__GNUC__ == 2) && (__GNUC_MINOR__ >= 96)
278 #define CONST_SDM_BUG
279 #endif
280
281 // Formatting.
282 #ifdef _LP64
283 #define FORMAT64_MODIFIER "l"
284 #else // !_LP64
285 #define FORMAT64_MODIFIER "ll"
286 #endif // _LP64
287
288 // HACK: gcc warns about applying offsetof() to non-POD object or calculating
289 // offset directly when base address is NULL. Use 16 to get around the
290 // warning. gcc-3.4 has an option -Wno-invalid-offsetof to suppress
291 // this warning.
292 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16)
293
294 #ifdef offsetof
295 # undef offsetof
296 #endif
297 #define offsetof(klass,field) offset_of(klass,field)
298
299 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_GCC_HPP