Tue, 29 Jul 2014 13:54:16 +0200
8040121: Load variable through a pointer of an incompatible type in src/hotspot/src/share/vm: opto/output.cpp, runtime/sharedRuntimeTrans.cpp, utilities/globalDefinitions_visCPP.hpp
Summary: Fixed parfait warnings in globalDefinitions files by using a union for casts.
Reviewed-by: kvn
1 /*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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25 #ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_VISCPP_HPP
26 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_VISCPP_HPP
28 #include "prims/jni.h"
30 // This file holds compiler-dependent includes,
31 // globally used constants & types, class (forward)
32 // declarations and a few frequently used utility functions.
34 # include <ctype.h>
35 # include <string.h>
36 # include <stdarg.h>
37 # include <stdlib.h>
38 # include <stddef.h>// for offsetof
39 # include <io.h> // for stream.cpp
40 # include <float.h> // for _isnan
41 # include <stdio.h> // for va_list
42 # include <time.h>
43 # include <fcntl.h>
44 # include <limits.h>
45 // Need this on windows to get the math constants (e.g., M_PI).
46 #define _USE_MATH_DEFINES
47 # include <math.h>
49 // 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures
50 // When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in
51 // system header files. On 32-bit architectures, there is no problem.
52 // On 64-bit architectures, defining NULL as a 32-bit constant can cause
53 // problems with varargs functions: C++ integral promotion rules say for
54 // varargs, we pass the argument 0 as an int. So, if NULL was passed to a
55 // varargs function it will remain 32-bits. Depending on the calling
56 // convention of the machine, if the argument is passed on the stack then
57 // only 32-bits of the "NULL" pointer may be initialized to zero. The
58 // other 32-bits will be garbage. If the varargs function is expecting a
59 // pointer when it extracts the argument, then we may have a problem.
60 //
61 // Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0.
62 #ifdef _LP64
63 #undef NULL
64 // 64-bit Windows uses a P64 data model (not LP64, although we define _LP64)
65 // Since longs are 32-bit we cannot use 0L here. Use the Visual C++ specific
66 // 64-bit integer-suffix (i64) instead.
67 #define NULL 0i64
68 #else
69 #ifndef NULL
70 #define NULL 0
71 #endif
72 #endif
74 // NULL vs NULL_WORD:
75 // On Linux NULL is defined as a special type '__null'. Assigning __null to
76 // integer variable will cause gcc warning. Use NULL_WORD in places where a
77 // pointer is stored as integer value.
78 #define NULL_WORD NULL
80 // Compiler-specific primitive types
81 typedef unsigned __int8 uint8_t;
82 typedef unsigned __int16 uint16_t;
83 typedef unsigned __int32 uint32_t;
84 typedef unsigned __int64 uint64_t;
86 #ifdef _WIN64
87 typedef unsigned __int64 uintptr_t;
88 #else
89 typedef unsigned int uintptr_t;
90 #endif
91 typedef signed __int8 int8_t;
92 typedef signed __int16 int16_t;
93 typedef signed __int32 int32_t;
94 typedef signed __int64 int64_t;
95 #ifdef _WIN64
96 typedef signed __int64 intptr_t;
97 typedef signed __int64 ssize_t;
98 #else
99 typedef signed int intptr_t;
100 typedef signed int ssize_t;
101 #endif
103 #ifndef UINTPTR_MAX
104 #ifdef _WIN64
105 #define UINTPTR_MAX _UI64_MAX
106 #else
107 #define UINTPTR_MAX _UI32_MAX
108 #endif
109 #endif
111 //----------------------------------------------------------------------------------------------------
112 // Additional Java basic types
114 typedef unsigned char jubyte;
115 typedef unsigned short jushort;
116 typedef unsigned int juint;
117 typedef unsigned __int64 julong;
120 //----------------------------------------------------------------------------------------------------
121 // Non-standard stdlib-like stuff:
122 inline int strcasecmp(const char *s1, const char *s2) { return _stricmp(s1,s2); }
123 inline int strncasecmp(const char *s1, const char *s2, size_t n) {
124 return _strnicmp(s1,s2,n);
125 }
128 //----------------------------------------------------------------------------------------------------
129 // Debugging
131 #if _WIN64
132 extern "C" void breakpoint();
133 #define BREAKPOINT ::breakpoint()
134 #else
135 #define BREAKPOINT __asm { int 3 }
136 #endif
138 //----------------------------------------------------------------------------------------------------
139 // Checking for nanness
141 inline int g_isnan(jfloat f) { return _isnan(f); }
142 inline int g_isnan(jdouble f) { return _isnan(f); }
144 //----------------------------------------------------------------------------------------------------
145 // Checking for finiteness
147 inline int g_isfinite(jfloat f) { return _finite(f); }
148 inline int g_isfinite(jdouble f) { return _finite(f); }
150 //----------------------------------------------------------------------------------------------------
151 // Constant for jlong (specifying an long long constant is C++ compiler specific)
153 // Build a 64bit integer constant on with Visual C++
154 #define CONST64(x) (x ## i64)
155 #define UCONST64(x) ((uint64_t)CONST64(x))
157 const jlong min_jlong = CONST64(0x8000000000000000);
158 const jlong max_jlong = CONST64(0x7fffffffffffffff);
160 //----------------------------------------------------------------------------------------------------
161 // Miscellaneous
163 // Visual Studio 2005 deprecates POSIX names - use ISO C++ names instead
164 #if _MSC_VER >= 1400
165 #define open _open
166 #define close _close
167 #define read _read
168 #define write _write
169 #define lseek _lseek
170 #define unlink _unlink
171 #define strdup _strdup
172 #endif
174 #pragma warning( disable : 4100 ) // unreferenced formal parameter
175 #pragma warning( disable : 4127 ) // conditional expression is constant
176 #pragma warning( disable : 4514 ) // unreferenced inline function has been removed
177 #pragma warning( disable : 4244 ) // possible loss of data
178 #pragma warning( disable : 4512 ) // assignment operator could not be generated
179 #pragma warning( disable : 4201 ) // nonstandard extension used : nameless struct/union (needed in windows.h)
180 #pragma warning( disable : 4511 ) // copy constructor could not be generated
181 #pragma warning( disable : 4291 ) // no matching operator delete found; memory will not be freed if initialization thows an exception
182 #ifdef CHECK_UNHANDLED_OOPS
183 #pragma warning( disable : 4521 ) // class has multiple copy ctors of a single type
184 #pragma warning( disable : 4522 ) // class has multiple assignment operators of a single type
185 #endif // CHECK_UNHANDLED_OOPS
186 #if _MSC_VER >= 1400
187 #pragma warning( disable : 4996 ) // unsafe string functions. Same as define _CRT_SECURE_NO_WARNINGS/_CRT_SECURE_NO_DEPRICATE
188 #endif
190 inline int vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
191 // If number of characters written == count, Windows doesn't write a
192 // terminating NULL, so we do it ourselves.
193 int ret = _vsnprintf(buf, count, fmt, argptr);
194 if (count > 0) buf[count-1] = '\0';
195 return ret;
196 }
198 // Portability macros
199 #define PRAGMA_INTERFACE
200 #define PRAGMA_IMPLEMENTATION
201 #define PRAGMA_IMPLEMENTATION_(arg)
202 #define VALUE_OBJ_CLASS_SPEC : public _ValueObj
204 // Formatting.
205 #define FORMAT64_MODIFIER "I64"
207 // Visual Studio doesn't provide inttypes.h so provide appropriate definitions here.
208 // The 32 bits ones might need I32 but seem to work ok without it.
209 #define PRId32 "d"
210 #define PRIu32 "u"
211 #define PRIx32 "x"
213 #define PRId64 "I64d"
214 #define PRIu64 "I64u"
215 #define PRIx64 "I64x"
217 #ifdef _LP64
218 #define PRIdPTR "I64d"
219 #define PRIuPTR "I64u"
220 #define PRIxPTR "I64x"
221 #else
222 #define PRIdPTR "d"
223 #define PRIuPTR "u"
224 #define PRIxPTR "x"
225 #endif
227 #define offset_of(klass,field) offsetof(klass,field)
229 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_VISCPP_HPP