1 /* 2 * Copyright (c) 1998, 2011, 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 #if (MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_4) 91 // Mac OS X 10.4 defines EFL_AC and EFL_ID, 92 // which conflict with hotspot variable names. 93 // 94 // This has been fixed in Mac OS X 10.5. 95 #undef EFL_AC 96 #undef EFL_ID 97 #endif 98 #endif 99 #include <sys/time.h> 100 #endif // LINUX || _ALLBSD_SOURCE 101 102 // 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures 103 // When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in 104 // system header files. On 32-bit architectures, there is no problem. 105 // On 64-bit architectures, defining NULL as a 32-bit constant can cause 106 // problems with varargs functions: C++ integral promotion rules say for 107 // varargs, we pass the argument 0 as an int. So, if NULL was passed to a 108 // varargs function it will remain 32-bits. Depending on the calling 109 // convention of the machine, if the argument is passed on the stack then 110 // only 32-bits of the "NULL" pointer may be initialized to zero. The 111 // other 32-bits will be garbage. If the varargs function is expecting a 112 // pointer when it extracts the argument, then we have a problem. 113 // 114 // Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0. 115 // 116 // Note: this fix doesn't work well on Linux because NULL will be overwritten 117 // whenever a system header file is included. Linux handles NULL correctly 118 // through a special type '__null'. 119 #ifdef SOLARIS 120 #ifdef _LP64 121 #undef NULL 122 #define NULL 0L 123 #else 124 #ifndef NULL 125 #define NULL 0 126 #endif 127 #endif 128 #endif 129 130 // NULL vs NULL_WORD: 131 // On Linux NULL is defined as a special type '__null'. Assigning __null to 132 // integer variable will cause gcc warning. Use NULL_WORD in places where a 133 // pointer is stored as integer value. On some platforms, sizeof(intptr_t) > 134 // sizeof(void*), so here we want something which is integer type, but has the 135 // same size as a pointer. 136 #ifdef __GNUC__ 137 #ifdef _LP64 138 #define NULL_WORD 0L 139 #else 140 // Cast 0 to intptr_t rather than int32_t since they are not the same type 141 // on platforms such as Mac OS X. 142 #define NULL_WORD ((intptr_t)0) 143 #endif 144 #else 145 #define NULL_WORD NULL 146 #endif 147 148 #if !defined(LINUX) && !defined(_ALLBSD_SOURCE) 149 // Compiler-specific primitive types 150 typedef unsigned short uint16_t; 151 #ifndef _UINT32_T 152 #define _UINT32_T 153 typedef unsigned int uint32_t; 154 #endif // _UINT32_T 155 156 #if !defined(_SYS_INT_TYPES_H) 157 #ifndef _UINT64_T 158 #define _UINT64_T 159 typedef unsigned long long uint64_t; 160 #endif // _UINT64_T 161 // %%%% how to access definition of intptr_t portably in 5.5 onward? 162 typedef int intptr_t; 163 typedef unsigned int uintptr_t; 164 // If this gets an error, figure out a symbol XXX that implies the 165 // prior definition of intptr_t, and add "&& !defined(XXX)" above. 166 #endif // _SYS_INT_TYPES_H 167 168 #endif // !LINUX && !_ALLBSD_SOURCE 169 170 // Additional Java basic types 171 172 typedef uint8_t jubyte; 173 typedef uint16_t jushort; 174 typedef uint32_t juint; 175 typedef uint64_t julong; 176 177 //---------------------------------------------------------------------------------------------------- 178 // Special (possibly not-portable) casts 179 // Cast floats into same-size integers and vice-versa w/o changing bit-pattern 180 // %%%%%% These seem like standard C++ to me--how about factoring them out? - Ungar 181 182 inline jint jint_cast (jfloat x) { return *(jint* )&x; } 183 inline jlong jlong_cast (jdouble x) { return *(jlong* )&x; } 184 185 inline jfloat jfloat_cast (jint x) { return *(jfloat* )&x; } 186 inline jdouble jdouble_cast(jlong x) { return *(jdouble*)&x; } 187 188 //---------------------------------------------------------------------------------------------------- 189 // Constant for jlong (specifying an long long canstant is C++ compiler specific) 190 191 // Build a 64bit integer constant 192 #define CONST64(x) (x ## LL) 193 #define UCONST64(x) (x ## ULL) 194 195 const jlong min_jlong = CONST64(0x8000000000000000); 196 const jlong max_jlong = CONST64(0x7fffffffffffffff); 197 198 199 #ifdef SOLARIS 200 //---------------------------------------------------------------------------------------------------- 201 // ANSI C++ fixes 202 // NOTE:In the ANSI committee's continuing attempt to make each version 203 // of C++ incompatible with the previous version, you can no longer cast 204 // pointers to functions without specifying linkage unless you want to get 205 // warnings. 206 // 207 // This also means that pointers to functions can no longer be "hidden" 208 // in opaque types like void * because at the invokation point warnings 209 // will be generated. While this makes perfect sense from a type safety 210 // point of view it causes a lot of warnings on old code using C header 211 // files. Here are some typedefs to make the job of silencing warnings 212 // a bit easier. 213 // 214 // The final kick in the teeth is that you can only have extern "C" linkage 215 // specified at file scope. So these typedefs are here rather than in the 216 // .hpp for the class (os:Solaris usually) that needs them. 217 218 extern "C" { 219 typedef int (*int_fnP_thread_t_iP_uP_stack_tP_gregset_t)(thread_t, int*, unsigned *, stack_t*, gregset_t); 220 typedef int (*int_fnP_thread_t_i_gregset_t)(thread_t, int, gregset_t); 221 typedef int (*int_fnP_thread_t_i)(thread_t, int); 222 typedef int (*int_fnP_thread_t)(thread_t); 223 224 typedef int (*int_fnP_cond_tP_mutex_tP_timestruc_tP)(cond_t *cv, mutex_t *mx, timestruc_t *abst); 225 typedef int (*int_fnP_cond_tP_mutex_tP)(cond_t *cv, mutex_t *mx); 226 227 // typedef for missing API in libc 228 typedef int (*int_fnP_mutex_tP_i_vP)(mutex_t *, int, void *); 229 typedef int (*int_fnP_mutex_tP)(mutex_t *); 230 typedef int (*int_fnP_cond_tP_i_vP)(cond_t *cv, int scope, void *arg); 231 typedef int (*int_fnP_cond_tP)(cond_t *cv); 232 }; 233 #endif // SOLARIS 234 235 //---------------------------------------------------------------------------------------------------- 236 // Debugging 237 238 #define DEBUG_EXCEPTION ::abort(); 239 240 #ifdef ARM 241 #ifdef SOLARIS 242 #define BREAKPOINT __asm__ volatile (".long 0xe1200070") 243 #else 244 #define BREAKPOINT __asm__ volatile (".long 0xe7f001f0") 245 #endif 246 #else 247 extern "C" void breakpoint(); 248 #define BREAKPOINT ::breakpoint() 249 #endif 250 251 // checking for nanness 252 #ifdef SOLARIS 253 #ifdef SPARC 254 inline int g_isnan(float f) { return isnanf(f); } 255 #else 256 // isnanf() broken on Intel Solaris use isnand() 257 inline int g_isnan(float f) { return isnand(f); } 258 #endif 259 inline int g_isnan(double f) { return isnand(f); } 260 #elif defined(__APPLE__) 261 inline int g_isnan(double f) { return isnan(f); } 262 #elif defined(LINUX) || defined(_ALLBSD_SOURCE) 263 inline int g_isnan(float f) { return isnanf(f); } 264 inline int g_isnan(double f) { return isnan(f); } 265 #else 266 #error "missing platform-specific definition here" 267 #endif 268 269 // GCC 4.3 does not allow 0.0/0.0 to produce a NAN value 270 #if (__GNUC__ == 4) && (__GNUC_MINOR__ > 2) 271 #define CAN_USE_NAN_DEFINE 1 272 #endif 273 274 275 // Checking for finiteness 276 277 inline int g_isfinite(jfloat f) { return finite(f); } 278 inline int g_isfinite(jdouble f) { return finite(f); } 279 280 281 // Wide characters 282 283 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); } 284 285 286 // Portability macros 287 #define PRAGMA_INTERFACE #pragma interface 288 #define PRAGMA_IMPLEMENTATION #pragma implementation 289 #define VALUE_OBJ_CLASS_SPEC 290 291 #if (__GNUC__ == 2) && (__GNUC_MINOR__ < 95) 292 #define TEMPLATE_TABLE_BUG 293 #endif 294 #if (__GNUC__ == 2) && (__GNUC_MINOR__ >= 96) 295 #define CONST_SDM_BUG 296 #endif 297 298 // Formatting. 299 #ifdef _LP64 300 #define FORMAT64_MODIFIER "l" 301 #else // !_LP64 302 #define FORMAT64_MODIFIER "ll" 303 #endif // _LP64 304 305 // HACK: gcc warns about applying offsetof() to non-POD object or calculating 306 // offset directly when base address is NULL. Use 16 to get around the 307 // warning. gcc-3.4 has an option -Wno-invalid-offsetof to suppress 308 // this warning. 309 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16) 310 311 #ifdef offsetof 312 # undef offsetof 313 #endif 314 #define offsetof(klass,field) offset_of(klass,field) 315 316 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_GCC_HPP