1 /*
2 * Copyright (c) 1997, 2009, 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 // This file holds compiler-dependent includes,
26 // globally used constants & types, class (forward)
27 // declarations and a few frequently used utility functions.
28
29
30 # include <ctype.h>
31 # include <dirent.h>
32 # include <string.h>
33 # include <strings.h> // for bsd'isms
34 # include <stdarg.h>
35 # include <stddef.h> // for offsetof
36 # include <stdio.h>
37 # include <stdlib.h>
38 # include <wchar.h>
39 # include <stdarg.h>
40 #ifdef SOLARIS
41 # include <ieeefp.h>
42 #endif
43 # include <math.h>
44 #ifdef LINUX
45 #ifndef FP_PZERO
46 // Linux doesn't have positive/negative zero
47 #define FP_PZERO FP_ZERO
48 #endif
49 #ifndef fpclass
50 #define fpclass fpclassify
51 #endif
52 #endif
53 # include <time.h>
54 # include <fcntl.h>
55 # include <dlfcn.h>
56 # include <pthread.h>
57 #ifdef SOLARIS
58 # include <thread.h>
59 #endif
60 # include <limits.h>
61 # include <errno.h>
62 #ifdef SOLARIS
63 # include <sys/trap.h>
64 # include <sys/regset.h>
65 # include <sys/procset.h>
66 # include <ucontext.h>
67 # include <setjmp.h>
68 #endif
69 # ifdef SOLARIS_MUTATOR_LIBTHREAD
70 # include <sys/procfs.h>
71 # endif
72 #ifdef LINUX
73 # include <inttypes.h>
74 # include <signal.h>
75 # include <ucontext.h>
76 # include <sys/time.h>
77 #endif
78
79
80 // 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures
81 // When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in
82 // system header files. On 32-bit architectures, there is no problem.
83 // On 64-bit architectures, defining NULL as a 32-bit constant can cause
84 // problems with varargs functions: C++ integral promotion rules say for
85 // varargs, we pass the argument 0 as an int. So, if NULL was passed to a
86 // varargs function it will remain 32-bits. Depending on the calling
87 // convention of the machine, if the argument is passed on the stack then
88 // only 32-bits of the "NULL" pointer may be initialized to zero. The
89 // other 32-bits will be garbage. If the varargs function is expecting a
90 // pointer when it extracts the argument, then we have a problem.
91 //
92 // Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0.
93 //
94 // Note: this fix doesn't work well on Linux because NULL will be overwritten
95 // whenever a system header file is included. Linux handles NULL correctly
96 // through a special type '__null'.
97 #ifdef SOLARIS
98 #ifdef _LP64
99 #undef NULL
100 #define NULL 0L
101 #else
102 #ifndef NULL
103 #define NULL 0
104 #endif
105 #endif
106 #endif
107
108 // NULL vs NULL_WORD:
109 // On Linux NULL is defined as a special type '__null'. Assigning __null to
110 // integer variable will cause gcc warning. Use NULL_WORD in places where a
111 // pointer is stored as integer value. On some platforms, sizeof(intptr_t) >
112 // sizeof(void*), so here we want something which is integer type, but has the
113 // same size as a pointer.
114 #ifdef LINUX
115 #ifdef _LP64
116 #define NULL_WORD 0L
117 #else
118 // Cast 0 to intptr_t rather than int32_t since they are not the same type
119 // on some platforms.
120 #define NULL_WORD ((intptr_t)0)
121 #endif
122 #else
123 #define NULL_WORD NULL
124 #endif
125
126 #ifndef LINUX
127 // Compiler-specific primitive types
128 typedef unsigned short uint16_t;
129 #ifndef _UINT32_T
130 #define _UINT32_T
131 typedef unsigned int uint32_t;
132 #endif
133 #if !defined(_SYS_INT_TYPES_H)
134 #ifndef _UINT64_T
135 #define _UINT64_T
136 typedef unsigned long long uint64_t;
137 #endif
138 // %%%% how to access definition of intptr_t portably in 5.5 onward?
139 typedef int intptr_t;
140 typedef unsigned int uintptr_t;
141 // If this gets an error, figure out a symbol XXX that implies the
142 // prior definition of intptr_t, and add "&& !defined(XXX)" above.
143 #endif
144 #endif
145
146 // Additional Java basic types
147
148 typedef unsigned char jubyte;
149 typedef unsigned short jushort;
150 typedef unsigned int juint;
151 typedef unsigned long long julong;
152
153 //----------------------------------------------------------------------------------------------------
154 // Special (possibly not-portable) casts
155 // Cast floats into same-size integers and vice-versa w/o changing bit-pattern
156
157 inline jint jint_cast (jfloat x) { return *(jint* )&x; }
158 inline jlong jlong_cast (jdouble x) { return *(jlong* )&x; }
159
160 inline jfloat jfloat_cast (jint x) { return *(jfloat* )&x; }
161 inline jdouble jdouble_cast(jlong x) { return *(jdouble*)&x; }
162
163 //----------------------------------------------------------------------------------------------------
164 // Constant for jlong (specifying an long long constant is C++ compiler specific)
165
166 // Build a 64bit integer constant
167 #define CONST64(x) (x ## LL)
168 #define UCONST64(x) (x ## ULL)
169
170 const jlong min_jlong = CONST64(0x8000000000000000);
171 const jlong max_jlong = CONST64(0x7fffffffffffffff);
172
173 #ifdef SOLARIS
174 //----------------------------------------------------------------------------------------------------
175 // ANSI C++ fixes
176 // NOTE:In the ANSI committee's continuing attempt to make each version
177 // of C++ incompatible with the previous version, you can no longer cast
178 // pointers to functions without specifying linkage unless you want to get
179 // warnings.
180 //
181 // This also means that pointers to functions can no longer be "hidden"
182 // in opaque types like void * because at the invokation point warnings
183 // will be generated. While this makes perfect sense from a type safety
184 // point of view it causes a lot of warnings on old code using C header
185 // files. Here are some typedefs to make the job of silencing warnings
186 // a bit easier.
187 //
188 // The final kick in the teeth is that you can only have extern "C" linkage
189 // specified at file scope. So these typedefs are here rather than in the
190 // .hpp for the class (os:Solaris usually) that needs them.
191
192 extern "C" {
193 typedef int (*int_fnP_thread_t_iP_uP_stack_tP_gregset_t)(thread_t, int*, unsigned *, stack_t*, gregset_t);
194 typedef int (*int_fnP_thread_t_i_gregset_t)(thread_t, int, gregset_t);
195 typedef int (*int_fnP_thread_t_i)(thread_t, int);
196 typedef int (*int_fnP_thread_t)(thread_t);
197
198 typedef int (*int_fnP_cond_tP_mutex_tP_timestruc_tP)(cond_t *cv, mutex_t *mx, timestruc_t *abst);
199 typedef int (*int_fnP_cond_tP_mutex_tP)(cond_t *cv, mutex_t *mx);
200
201 // typedef for missing API in libc
202 typedef int (*int_fnP_mutex_tP_i_vP)(mutex_t *, int, void *);
203 typedef int (*int_fnP_mutex_tP)(mutex_t *);
204 typedef int (*int_fnP_cond_tP_i_vP)(cond_t *cv, int scope, void *arg);
205 typedef int (*int_fnP_cond_tP)(cond_t *cv);
206 };
207 #endif
208
209 //----------------------------------------------------------------------------------------------------
210 // Debugging
211
212 #define DEBUG_EXCEPTION ::abort();
213
214 extern "C" void breakpoint();
215 #define BREAKPOINT ::breakpoint()
216
217 // checking for nanness
218 #ifdef SOLARIS
219 #ifdef SPARC
220 inline int g_isnan(float f) { return isnanf(f); }
221 #else
222 // isnanf() broken on Intel Solaris use isnand()
223 inline int g_isnan(float f) { return isnand(f); }
224 #endif
225
226 inline int g_isnan(double f) { return isnand(f); }
227 #elif LINUX
228 inline int g_isnan(float f) { return isnanf(f); }
229 inline int g_isnan(double f) { return isnan(f); }
230 #else
231 #error "missing platform-specific definition here"
232 #endif
233
234 // Checking for finiteness
235
236 inline int g_isfinite(jfloat f) { return finite(f); }
237 inline int g_isfinite(jdouble f) { return finite(f); }
238
239
240 // Wide characters
241
242 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }
243
244
245 // Misc
246 // NOTE: This one leads to an infinite recursion on Linux
247 #ifndef LINUX
248 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr);
249 #define vsnprintf local_vsnprintf
250 #endif
251
252 // Portability macros
253 #define PRAGMA_INTERFACE
254 #define PRAGMA_IMPLEMENTATION
255 #define PRAGMA_IMPLEMENTATION_(arg)
256 #define VALUE_OBJ_CLASS_SPEC : public _ValueObj
257
258 // Formatting.
259 #ifdef _LP64
260 #define FORMAT64_MODIFIER "l"
261 #else // !_LP64
262 #define FORMAT64_MODIFIER "ll"
263 #endif // _LP64
264
265 #define offset_of(klass,field) offsetof(klass,field)