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comparison: src/share/vm/utilities/globalDefinitions_gcc.hpp

src/share/vm/utilities/globalDefinitions_gcc.hpp

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1 /*
2 * Copyright (c) 1998, 2014, 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 #if defined(LINUX) || defined(_ALLBSD_SOURCE)
80 #ifndef __STDC_LIMIT_MACROS
81 #define __STDC_LIMIT_MACROS
82 #endif // __STDC_LIMIT_MACROS
83 #include <inttypes.h>
84 #include <signal.h>
85 #ifndef __OpenBSD__
86 #include <ucontext.h>
87 #endif
88 #ifdef __APPLE__
89 #include <AvailabilityMacros.h>
90 #include <mach/mach.h>
91 #endif
92 #include <sys/time.h>
93 #endif // LINUX || _ALLBSD_SOURCE
94
95 // 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures
96 // When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in
97 // system header files. On 32-bit architectures, there is no problem.
98 // On 64-bit architectures, defining NULL as a 32-bit constant can cause
99 // problems with varargs functions: C++ integral promotion rules say for
100 // varargs, we pass the argument 0 as an int. So, if NULL was passed to a
101 // varargs function it will remain 32-bits. Depending on the calling
102 // convention of the machine, if the argument is passed on the stack then
103 // only 32-bits of the "NULL" pointer may be initialized to zero. The
104 // other 32-bits will be garbage. If the varargs function is expecting a
105 // pointer when it extracts the argument, then we have a problem.
106 //
107 // Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0.
108 //
109 // Note: this fix doesn't work well on Linux because NULL will be overwritten
110 // whenever a system header file is included. Linux handles NULL correctly
111 // through a special type '__null'.
112 #ifdef SOLARIS
113 #ifdef _LP64
114 #undef NULL
115 #define NULL 0L
116 #else
117 #ifndef NULL
118 #define NULL 0
119 #endif
120 #endif
121 #endif
122
123 // NULL vs NULL_WORD:
124 // On Linux NULL is defined as a special type '__null'. Assigning __null to
125 // integer variable will cause gcc warning. Use NULL_WORD in places where a
126 // pointer is stored as integer value. On some platforms, sizeof(intptr_t) >
127 // sizeof(void*), so here we want something which is integer type, but has the
128 // same size as a pointer.
129 #ifdef __GNUC__
130 #ifdef _LP64
131 #define NULL_WORD 0L
132 #else
133 // Cast 0 to intptr_t rather than int32_t since they are not the same type
134 // on platforms such as Mac OS X.
135 #define NULL_WORD ((intptr_t)0)
136 #endif
137 #else
138 #define NULL_WORD NULL
139 #endif
140
141 #if !defined(LINUX) && !defined(_ALLBSD_SOURCE)
142 // Compiler-specific primitive types
143 typedef unsigned short uint16_t;
144 #ifndef _UINT32_T
145 #define _UINT32_T
146 typedef unsigned int uint32_t;
147 #endif // _UINT32_T
148
149 #if !defined(_SYS_INT_TYPES_H)
150 #ifndef _UINT64_T
151 #define _UINT64_T
152 typedef unsigned long long uint64_t;
153 #endif // _UINT64_T
154 // %%%% how to access definition of intptr_t portably in 5.5 onward?
155 typedef int intptr_t;
156 typedef unsigned int uintptr_t;
157 // If this gets an error, figure out a symbol XXX that implies the
158 // prior definition of intptr_t, and add "&& !defined(XXX)" above.
159 #endif // _SYS_INT_TYPES_H
160
161 #endif // !LINUX && !_ALLBSD_SOURCE
162
163 // Additional Java basic types
164
165 typedef uint8_t jubyte;
166 typedef uint16_t jushort;
167 typedef uint32_t juint;
168 typedef uint64_t julong;
169
170 //----------------------------------------------------------------------------------------------------
171 // Special (possibly not-portable) casts
172 // Cast floats into same-size integers and vice-versa w/o changing bit-pattern
173 // %%%%%% These seem like standard C++ to me--how about factoring them out? - Ungar
174
175 inline jint jint_cast (jfloat x) { return *(jint* )&x; }
176 inline jlong jlong_cast (jdouble x) { return *(jlong* )&x; }
177 inline julong julong_cast (jdouble x) { return *(julong* )&x; }
178
179 inline jfloat jfloat_cast (jint x) { return *(jfloat* )&x; }
180 inline jdouble jdouble_cast(jlong x) { return *(jdouble*)&x; }
181
182 //----------------------------------------------------------------------------------------------------
183 // Constant for jlong (specifying an long long canstant is C++ compiler specific)
184
185 // Build a 64bit integer constant
186 #define CONST64(x) (x ## LL)
187 #define UCONST64(x) (x ## ULL)
188
189 const jlong min_jlong = CONST64(0x8000000000000000);
190 const jlong max_jlong = CONST64(0x7fffffffffffffff);
191
192
193 #ifdef SOLARIS
194 //----------------------------------------------------------------------------------------------------
195 // ANSI C++ fixes
196 // NOTE:In the ANSI committee's continuing attempt to make each version
197 // of C++ incompatible with the previous version, you can no longer cast
198 // pointers to functions without specifying linkage unless you want to get
199 // warnings.
200 //
201 // This also means that pointers to functions can no longer be "hidden"
202 // in opaque types like void * because at the invokation point warnings
203 // will be generated. While this makes perfect sense from a type safety
204 // point of view it causes a lot of warnings on old code using C header
205 // files. Here are some typedefs to make the job of silencing warnings
206 // a bit easier.
207 //
208 // The final kick in the teeth is that you can only have extern "C" linkage
209 // specified at file scope. So these typedefs are here rather than in the
210 // .hpp for the class (os:Solaris usually) that needs them.
211
212 extern "C" {
213 typedef int (*int_fnP_thread_t_iP_uP_stack_tP_gregset_t)(thread_t, int*, unsigned *, stack_t*, gregset_t);
214 typedef int (*int_fnP_thread_t_i_gregset_t)(thread_t, int, gregset_t);
215 typedef int (*int_fnP_thread_t_i)(thread_t, int);
216 typedef int (*int_fnP_thread_t)(thread_t);
217
218 typedef int (*int_fnP_cond_tP_mutex_tP_timestruc_tP)(cond_t *cv, mutex_t *mx, timestruc_t *abst);
219 typedef int (*int_fnP_cond_tP_mutex_tP)(cond_t *cv, mutex_t *mx);
220
221 // typedef for missing API in libc
222 typedef int (*int_fnP_mutex_tP_i_vP)(mutex_t *, int, void *);
223 typedef int (*int_fnP_mutex_tP)(mutex_t *);
224 typedef int (*int_fnP_cond_tP_i_vP)(cond_t *cv, int scope, void *arg);
225 typedef int (*int_fnP_cond_tP)(cond_t *cv);
226 };
227 #endif // SOLARIS
228
229 //----------------------------------------------------------------------------------------------------
230 // Debugging
231
232 #define DEBUG_EXCEPTION ::abort();
233
234 #ifdef ARM
235 #ifdef SOLARIS
236 #define BREAKPOINT __asm__ volatile (".long 0xe1200070")
237 #else
238 #define BREAKPOINT __asm__ volatile (".long 0xe7f001f0")
239 #endif
240 #else
241 extern "C" void breakpoint();
242 #define BREAKPOINT ::breakpoint()
243 #endif
244
245 // checking for nanness
246 #ifdef SOLARIS
247 #ifdef SPARC
248 inline int g_isnan(float f) { return isnanf(f); }
249 #else
250 // isnanf() broken on Intel Solaris use isnand()
251 inline int g_isnan(float f) { return isnand(f); }
252 #endif
253 inline int g_isnan(double f) { return isnand(f); }
254 #elif defined(__APPLE__)
255 inline int g_isnan(double f) { return isnan(f); }
256 #elif defined(LINUX) || defined(_ALLBSD_SOURCE)
257 inline int g_isnan(float f) { return isnanf(f); }
258 inline int g_isnan(double f) { return isnan(f); }
259 #else
260 #error "missing platform-specific definition here"
261 #endif
262
263 // GCC 4.3 does not allow 0.0/0.0 to produce a NAN value
264 #if (__GNUC__ == 4) && (__GNUC_MINOR__ > 2)
265 #define CAN_USE_NAN_DEFINE 1
266 #endif
267
268
269 // Checking for finiteness
270
271 inline int g_isfinite(jfloat f) { return finite(f); }
272 inline int g_isfinite(jdouble f) { return finite(f); }
273
274
275 // Wide characters
276
277 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }
278
279
280 // Portability macros
281 #define PRAGMA_INTERFACE #pragma interface
282 #define PRAGMA_IMPLEMENTATION #pragma implementation
283 #define VALUE_OBJ_CLASS_SPEC
284
285 #ifndef ATTRIBUTE_PRINTF
286 // Diagnostic pragmas like the ones defined below in PRAGMA_FORMAT_NONLITERAL_IGNORED
287 // were only introduced in GCC 4.2. Because we have no other possibility to ignore
288 // these warnings for older versions of GCC, we simply don't decorate our printf-style
289 // functions with __attribute__(format) in that case.
290 #if ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 2)) || (__GNUC__ > 4)
291 #define ATTRIBUTE_PRINTF(fmt,vargs) __attribute__((format(printf, fmt, vargs)))
292 #else
293 #define ATTRIBUTE_PRINTF(fmt,vargs)
294 #endif
295 #endif
296
297 #define PRAGMA_FORMAT_NONLITERAL_IGNORED _Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"") \
298 _Pragma("GCC diagnostic ignored \"-Wformat-security\"")
299 #define PRAGMA_FORMAT_IGNORED _Pragma("GCC diagnostic ignored \"-Wformat\"")
300
301 #if defined(__clang_major__) && \
302 (__clang_major__ >= 4 || \
303 (__clang_major__ >= 3 && __clang_minor__ >= 1)) || \
304 ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 6)) || (__GNUC__ > 4)
305 // Tested to work with clang version 3.1 and better.
306 #define PRAGMA_DIAG_PUSH _Pragma("GCC diagnostic push")
307 #define PRAGMA_DIAG_POP _Pragma("GCC diagnostic pop")
308 #define PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL
309 #define PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL PRAGMA_FORMAT_NONLITERAL_IGNORED
310
311 // Hack to deal with gcc yammering about non-security format stuff
312 #else
313 // Old versions of gcc don't do push/pop, also do not cope with this pragma within a function
314 // One method does so much varied printing that it is decorated with both internal and external
315 // versions of the macro-pragma to obtain better checking with newer compilers.
316 #define PRAGMA_DIAG_PUSH
317 #define PRAGMA_DIAG_POP
318 #define PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL PRAGMA_FORMAT_NONLITERAL_IGNORED
319 #define PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL
320 #endif
321
322 #ifndef __clang_major__
323 #define PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC _Pragma("GCC diagnostic ignored \"-Wformat\"") _Pragma("GCC diagnostic error \"-Wformat-nonliteral\"") _Pragma("GCC diagnostic error \"-Wformat-security\"")
324 #endif
325
326 #if (__GNUC__ == 2) && (__GNUC_MINOR__ < 95)
327 #define TEMPLATE_TABLE_BUG
328 #endif
329 #if (__GNUC__ == 2) && (__GNUC_MINOR__ >= 96)
330 #define CONST_SDM_BUG
331 #endif
332
333 // Formatting.
334 #ifdef _LP64
335 #define FORMAT64_MODIFIER "l"
336 #else // !_LP64
337 #define FORMAT64_MODIFIER "ll"
338 #endif // _LP64
339
340 // HACK: gcc warns about applying offsetof() to non-POD object or calculating
341 // offset directly when base address is NULL. Use 16 to get around the
342 // warning. gcc-3.4 has an option -Wno-invalid-offsetof to suppress
343 // this warning.
344 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16)
345
346 #ifdef offsetof
347 # undef offsetof
348 #endif
349 #define offsetof(klass,field) offset_of(klass,field)
350
351 #if defined(_LP64) && defined(__APPLE__)
352 #define JLONG_FORMAT "%ld"
353 #endif // _LP64 && __APPLE__
354
355 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_GCC_HPP

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