1 /* 2 * Copyright (c) 1998, 2017, 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 #include <time.h> 48 #include <fcntl.h> 49 #include <dlfcn.h> 50 #include <pthread.h> 51 52 #ifdef SOLARIS 53 #include <thread.h> 54 #endif // SOLARIS 55 56 #include <limits.h> 57 #include <errno.h> 58 59 #ifdef SOLARIS 60 #include <sys/trap.h> 61 #include <sys/regset.h> 62 #include <sys/procset.h> 63 #include <ucontext.h> 64 #include <setjmp.h> 65 #endif // SOLARIS 66 67 # ifdef SOLARIS_MUTATOR_LIBTHREAD 68 # include <sys/procfs.h> 69 # endif 70 71 #if defined(LINUX) || defined(_ALLBSD_SOURCE) 72 #include <inttypes.h> 73 #include <signal.h> 74 #ifndef __OpenBSD__ 75 #include <ucontext.h> 76 #endif 77 #ifdef __APPLE__ 78 #include <AvailabilityMacros.h> 79 #include <mach/mach.h> 80 #endif 81 #include <sys/time.h> 82 #endif // LINUX || _ALLBSD_SOURCE 83 84 // 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures 85 // When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in 86 // system header files. On 32-bit architectures, there is no problem. 87 // On 64-bit architectures, defining NULL as a 32-bit constant can cause 88 // problems with varargs functions: C++ integral promotion rules say for 89 // varargs, we pass the argument 0 as an int. So, if NULL was passed to a 90 // varargs function it will remain 32-bits. Depending on the calling 91 // convention of the machine, if the argument is passed on the stack then 92 // only 32-bits of the "NULL" pointer may be initialized to zero. The 93 // other 32-bits will be garbage. If the varargs function is expecting a 94 // pointer when it extracts the argument, then we have a problem. 95 // 96 // Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0. 97 // 98 // Note: this fix doesn't work well on Linux because NULL will be overwritten 99 // whenever a system header file is included. Linux handles NULL correctly 100 // through a special type '__null'. 101 #ifdef SOLARIS 102 #ifdef _LP64 103 #undef NULL 104 #define NULL 0L 105 #else 106 #ifndef NULL 107 #define NULL 0 108 #endif 109 #endif 110 #endif 111 112 // NULL vs NULL_WORD: 113 // On Linux NULL is defined as a special type '__null'. Assigning __null to 114 // integer variable will cause gcc warning. Use NULL_WORD in places where a 115 // pointer is stored as integer value. On some platforms, sizeof(intptr_t) > 116 // sizeof(void*), so here we want something which is integer type, but has the 117 // same size as a pointer. 118 #ifdef __GNUC__ 119 #ifdef _LP64 120 #define NULL_WORD 0L 121 #else 122 // Cast 0 to intptr_t rather than int32_t since they are not the same type 123 // on platforms such as Mac OS X. 124 #define NULL_WORD ((intptr_t)0) 125 #endif 126 #else 127 #define NULL_WORD NULL 128 #endif 129 130 #if !defined(LINUX) && !defined(_ALLBSD_SOURCE) 131 // Compiler-specific primitive types 132 typedef unsigned short uint16_t; 133 #ifndef _UINT32_T 134 #define _UINT32_T 135 typedef unsigned int uint32_t; 136 #endif // _UINT32_T 137 138 #if !defined(_SYS_INT_TYPES_H) 139 #ifndef _UINT64_T 140 #define _UINT64_T 141 typedef unsigned long long uint64_t; 142 #endif // _UINT64_T 143 // %%%% how to access definition of intptr_t portably in 5.5 onward? 144 typedef int intptr_t; 145 typedef unsigned int uintptr_t; 146 // If this gets an error, figure out a symbol XXX that implies the 147 // prior definition of intptr_t, and add "&& !defined(XXX)" above. 148 #endif // _SYS_INT_TYPES_H 149 150 #endif // !LINUX && !_ALLBSD_SOURCE 151 152 // Additional Java basic types 153 154 typedef uint8_t jubyte; 155 typedef uint16_t jushort; 156 typedef uint32_t juint; 157 typedef uint64_t julong; 158 159 160 #ifdef SOLARIS 161 //---------------------------------------------------------------------------------------------------- 162 // ANSI C++ fixes 163 // NOTE:In the ANSI committee's continuing attempt to make each version 164 // of C++ incompatible with the previous version, you can no longer cast 165 // pointers to functions without specifying linkage unless you want to get 166 // warnings. 167 // 168 // This also means that pointers to functions can no longer be "hidden" 169 // in opaque types like void * because at the invokation point warnings 170 // will be generated. While this makes perfect sense from a type safety 171 // point of view it causes a lot of warnings on old code using C header 172 // files. Here are some typedefs to make the job of silencing warnings 173 // a bit easier. 174 // 175 // The final kick in the teeth is that you can only have extern "C" linkage 176 // specified at file scope. So these typedefs are here rather than in the 177 // .hpp for the class (os:Solaris usually) that needs them. 178 179 extern "C" { 180 typedef int (*int_fnP_thread_t_iP_uP_stack_tP_gregset_t)(thread_t, int*, unsigned *, stack_t*, gregset_t); 181 typedef int (*int_fnP_thread_t_i_gregset_t)(thread_t, int, gregset_t); 182 typedef int (*int_fnP_thread_t_i)(thread_t, int); 183 typedef int (*int_fnP_thread_t)(thread_t); 184 185 typedef int (*int_fnP_cond_tP_mutex_tP_timestruc_tP)(cond_t *cv, mutex_t *mx, timestruc_t *abst); 186 typedef int (*int_fnP_cond_tP_mutex_tP)(cond_t *cv, mutex_t *mx); 187 188 // typedef for missing API in libc 189 typedef int (*int_fnP_mutex_tP_i_vP)(mutex_t *, int, void *); 190 typedef int (*int_fnP_mutex_tP)(mutex_t *); 191 typedef int (*int_fnP_cond_tP_i_vP)(cond_t *cv, int scope, void *arg); 192 typedef int (*int_fnP_cond_tP)(cond_t *cv); 193 }; 194 #endif // SOLARIS 195 196 //---------------------------------------------------------------------------------------------------- 197 // Debugging 198 199 #define DEBUG_EXCEPTION ::abort(); 200 201 extern "C" void breakpoint(); 202 #define BREAKPOINT ::breakpoint() 203 204 // checking for nanness 205 #ifdef SOLARIS 206 #ifdef SPARC 207 inline int g_isnan(float f) { return isnanf(f); } 208 #else 209 // isnanf() broken on Intel Solaris use isnand() 210 inline int g_isnan(float f) { return isnand(f); } 211 #endif 212 inline int g_isnan(double f) { return isnand(f); } 213 #elif defined(__APPLE__) 214 inline int g_isnan(double f) { return isnan(f); } 215 #elif defined(LINUX) || defined(_ALLBSD_SOURCE) 216 inline int g_isnan(float f) { return isnanf(f); } 217 inline int g_isnan(double f) { return isnan(f); } 218 #else 219 #error "missing platform-specific definition here" 220 #endif 221 222 // GCC 4.3 does not allow 0.0/0.0 to produce a NAN value 223 #if (__GNUC__ == 4) && (__GNUC_MINOR__ > 2) 224 #define CAN_USE_NAN_DEFINE 1 225 #endif 226 227 228 // Checking for finiteness 229 230 inline int g_isfinite(jfloat f) { return finite(f); } 231 inline int g_isfinite(jdouble f) { return finite(f); } 232 233 234 // Wide characters 235 236 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); } 237 238 239 // Portability macros 240 #define PRAGMA_INTERFACE #pragma interface 241 #define PRAGMA_IMPLEMENTATION #pragma implementation 242 #define VALUE_OBJ_CLASS_SPEC 243 244 // Diagnostic pragmas like the ones defined below in PRAGMA_FORMAT_NONLITERAL_IGNORED 245 // were only introduced in GCC 4.2. Because we have no other possibility to ignore 246 // these warnings for older versions of GCC, we simply don't decorate our printf-style 247 // functions with __attribute__(format) in that case. 248 #if ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 2)) || (__GNUC__ > 4) 249 #ifndef ATTRIBUTE_PRINTF 250 #define ATTRIBUTE_PRINTF(fmt,vargs) __attribute__((format(printf, fmt, vargs))) 251 #endif 252 #ifndef ATTRIBUTE_SCANF 253 #define ATTRIBUTE_SCANF(fmt,vargs) __attribute__((format(scanf, fmt, vargs))) 254 #endif 255 #endif 256 257 #define PRAGMA_FORMAT_NONLITERAL_IGNORED _Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"") \ 258 _Pragma("GCC diagnostic ignored \"-Wformat-security\"") 259 #define PRAGMA_FORMAT_IGNORED _Pragma("GCC diagnostic ignored \"-Wformat\"") 260 261 #if defined(__clang_major__) && \ 262 (__clang_major__ >= 4 || \ 263 (__clang_major__ >= 3 && __clang_minor__ >= 1)) || \ 264 ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 6)) || (__GNUC__ > 4) 265 // Tested to work with clang version 3.1 and better. 266 #define PRAGMA_DIAG_PUSH _Pragma("GCC diagnostic push") 267 #define PRAGMA_DIAG_POP _Pragma("GCC diagnostic pop") 268 269 // Hack to deal with gcc yammering about non-security format stuff 270 #else 271 // Old versions of gcc don't do push/pop, also do not cope with this pragma within a function 272 // One method does so much varied printing that it is decorated with both internal and external 273 // versions of the macro-pragma to obtain better checking with newer compilers. 274 #define PRAGMA_DIAG_PUSH 275 #define PRAGMA_DIAG_POP 276 #endif 277 278 #if (__GNUC__ == 2) && (__GNUC_MINOR__ < 95) 279 #define TEMPLATE_TABLE_BUG 280 #endif 281 #if (__GNUC__ == 2) && (__GNUC_MINOR__ >= 96) 282 #define CONST_SDM_BUG 283 #endif 284 285 // Formatting. 286 #ifdef _LP64 287 #define FORMAT64_MODIFIER "l" 288 #else // !_LP64 289 #define FORMAT64_MODIFIER "ll" 290 #endif // _LP64 291 292 // HACK: gcc warns about applying offsetof() to non-POD object or calculating 293 // offset directly when base address is NULL. Use 16 to get around the 294 // warning. gcc-3.4 has an option -Wno-invalid-offsetof to suppress 295 // this warning. 296 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16) 297 298 #ifdef offsetof 299 # undef offsetof 300 #endif 301 #define offsetof(klass,field) offset_of(klass,field) 302 303 #if defined(_LP64) && defined(__APPLE__) 304 #define JLONG_FORMAT "%ld" 305 #endif // _LP64 && __APPLE__ 306 307 #ifndef USE_LIBRARY_BASED_TLS_ONLY 308 #define THREAD_LOCAL_DECL __thread 309 #endif 310 311 // Inlining support 312 #define NOINLINE __attribute__ ((noinline)) 313 #define ALWAYSINLINE inline __attribute__ ((always_inline)) 314 315 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_GCC_HPP