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