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annotate src/share/vm/utilities/globalDefinitions_gcc.hpp @ 17718:804f89b6ff46 hs25.20-b06
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date | Thu, 13 Mar 2014 09:57:31 -0700 |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_GCC_HPP |
26 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_GCC_HPP | |
27 | |
28 #include "prims/jni.h" | |
29 | |
0 | 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 | |
3960 | 79 #if defined(LINUX) || defined(_ALLBSD_SOURCE) |
2447 | 80 #ifndef __STDC_LIMIT_MACROS |
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81 #define __STDC_LIMIT_MACROS |
2447 | 82 #endif // __STDC_LIMIT_MACROS |
0 | 83 #include <inttypes.h> |
84 #include <signal.h> | |
3960 | 85 #ifndef __OpenBSD__ |
0 | 86 #include <ucontext.h> |
3960 | 87 #endif |
88 #ifdef __APPLE__ | |
89 #include <AvailabilityMacros.h> | |
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90 #include <mach/mach.h> |
3960 | 91 #endif |
0 | 92 #include <sys/time.h> |
3960 | 93 #endif // LINUX || _ALLBSD_SOURCE |
0 | 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. | |
3960 | 129 #ifdef __GNUC__ |
0 | 130 #ifdef _LP64 |
131 #define NULL_WORD 0L | |
132 #else | |
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133 // Cast 0 to intptr_t rather than int32_t since they are not the same type |
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134 // on platforms such as Mac OS X. |
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135 #define NULL_WORD ((intptr_t)0) |
0 | 136 #endif |
137 #else | |
138 #define NULL_WORD NULL | |
139 #endif | |
140 | |
3960 | 141 #if !defined(LINUX) && !defined(_ALLBSD_SOURCE) |
0 | 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 | |
3960 | 161 #endif // !LINUX && !_ALLBSD_SOURCE |
0 | 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; } | |
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177 inline julong julong_cast (jdouble x) { return *(julong* )&x; } |
0 | 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 | |
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234 #ifdef ARM |
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235 #ifdef SOLARIS |
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236 #define BREAKPOINT __asm__ volatile (".long 0xe1200070") |
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237 #else |
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238 #define BREAKPOINT __asm__ volatile (".long 0xe7f001f0") |
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239 #endif |
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240 #else |
0 | 241 extern "C" void breakpoint(); |
242 #define BREAKPOINT ::breakpoint() | |
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243 #endif |
0 | 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); } | |
3960 | 254 #elif defined(__APPLE__) |
255 inline int g_isnan(double f) { return isnan(f); } | |
256 #elif defined(LINUX) || defined(_ALLBSD_SOURCE) | |
0 | 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 | |
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263 // GCC 4.3 does not allow 0.0/0.0 to produce a NAN value |
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264 #if (__GNUC__ == 4) && (__GNUC_MINOR__ > 2) |
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265 #define CAN_USE_NAN_DEFINE 1 |
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266 #endif |
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267 |
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268 |
0 | 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 #if (__GNUC__ == 2) && (__GNUC_MINOR__ < 95) | |
286 #define TEMPLATE_TABLE_BUG | |
287 #endif | |
288 #if (__GNUC__ == 2) && (__GNUC_MINOR__ >= 96) | |
289 #define CONST_SDM_BUG | |
290 #endif | |
291 | |
292 // Formatting. | |
293 #ifdef _LP64 | |
294 #define FORMAT64_MODIFIER "l" | |
295 #else // !_LP64 | |
296 #define FORMAT64_MODIFIER "ll" | |
297 #endif // _LP64 | |
298 | |
299 // HACK: gcc warns about applying offsetof() to non-POD object or calculating | |
300 // offset directly when base address is NULL. Use 16 to get around the | |
301 // warning. gcc-3.4 has an option -Wno-invalid-offsetof to suppress | |
302 // this warning. | |
303 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16) | |
304 | |
305 #ifdef offsetof | |
306 # undef offsetof | |
307 #endif | |
308 #define offsetof(klass,field) offset_of(klass,field) | |
1972 | 309 |
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310 #if defined(_LP64) && defined(__APPLE__) |
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311 #define JLONG_FORMAT "%ld" |
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312 #endif // _LP64 && __APPLE__ |
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313 |
1972 | 314 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_GCC_HPP |