277 lines
8.8 KiB
C++
277 lines
8.8 KiB
C++
/*
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* Copyright (c) 1998, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_UTILITIES_GLOBALDEFINITIONS_GCC_HPP
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#define SHARE_UTILITIES_GLOBALDEFINITIONS_GCC_HPP
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#include "jni.h"
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// This file holds compiler-dependent includes,
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// globally used constants & types, class (forward)
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// declarations and a few frequently used utility functions.
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#include <ctype.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <wchar.h>
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#ifdef SOLARIS
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#include <ieeefp.h>
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#endif // SOLARIS
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#include <math.h>
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#include <time.h>
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#include <fcntl.h>
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#include <dlfcn.h>
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#include <pthread.h>
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#ifdef SOLARIS
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#include <thread.h>
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#endif // SOLARIS
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#include <limits.h>
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#include <errno.h>
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#ifdef SOLARIS
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#include <sys/trap.h>
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#include <sys/regset.h>
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#include <sys/procset.h>
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#include <ucontext.h>
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#include <setjmp.h>
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#endif // SOLARIS
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# ifdef SOLARIS_MUTATOR_LIBTHREAD
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# include <sys/procfs.h>
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# endif
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#if defined(LINUX) || defined(_ALLBSD_SOURCE)
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#include <inttypes.h>
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#include <signal.h>
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#ifndef __OpenBSD__
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#include <ucontext.h>
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#endif
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#ifdef __APPLE__
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#include <AvailabilityMacros.h>
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#include <mach/mach.h>
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#endif
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#include <sys/time.h>
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#endif // LINUX || _ALLBSD_SOURCE
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// 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures
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// When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in
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// system header files. On 32-bit architectures, there is no problem.
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// On 64-bit architectures, defining NULL as a 32-bit constant can cause
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// problems with varargs functions: C++ integral promotion rules say for
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// varargs, we pass the argument 0 as an int. So, if NULL was passed to a
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// varargs function it will remain 32-bits. Depending on the calling
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// convention of the machine, if the argument is passed on the stack then
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// only 32-bits of the "NULL" pointer may be initialized to zero. The
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// other 32-bits will be garbage. If the varargs function is expecting a
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// pointer when it extracts the argument, then we have a problem.
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//
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// Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0.
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//
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// Note: this fix doesn't work well on Linux because NULL will be overwritten
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// whenever a system header file is included. Linux handles NULL correctly
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// through a special type '__null'.
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#ifdef SOLARIS
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#ifdef _LP64
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#undef NULL
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#define NULL 0L
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#else
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#ifndef NULL
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#define NULL 0
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#endif
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#endif
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#endif
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// NULL vs NULL_WORD:
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// On Linux NULL is defined as a special type '__null'. Assigning __null to
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// integer variable will cause gcc warning. Use NULL_WORD in places where a
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// pointer is stored as integer value. On some platforms, sizeof(intptr_t) >
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// sizeof(void*), so here we want something which is integer type, but has the
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// same size as a pointer.
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#ifdef __GNUC__
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#ifdef _LP64
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#define NULL_WORD 0L
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#else
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// Cast 0 to intptr_t rather than int32_t since they are not the same type
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// on platforms such as Mac OS X.
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#define NULL_WORD ((intptr_t)0)
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#endif
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#else
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#define NULL_WORD NULL
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#endif
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#if !defined(LINUX) && !defined(_ALLBSD_SOURCE)
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// Compiler-specific primitive types
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typedef unsigned short uint16_t;
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#ifndef _UINT32_T
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#define _UINT32_T
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typedef unsigned int uint32_t;
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#endif // _UINT32_T
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#if !defined(_SYS_INT_TYPES_H)
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#ifndef _UINT64_T
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#define _UINT64_T
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typedef unsigned long long uint64_t;
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#endif // _UINT64_T
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// %%%% how to access definition of intptr_t portably in 5.5 onward?
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typedef int intptr_t;
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typedef unsigned int uintptr_t;
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// If this gets an error, figure out a symbol XXX that implies the
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// prior definition of intptr_t, and add "&& !defined(XXX)" above.
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#endif // _SYS_INT_TYPES_H
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#endif // !LINUX && !_ALLBSD_SOURCE
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// Additional Java basic types
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typedef uint8_t jubyte;
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typedef uint16_t jushort;
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typedef uint32_t juint;
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typedef uint64_t julong;
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#ifdef SOLARIS
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// ANSI C++ fixes
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// NOTE:In the ANSI committee's continuing attempt to make each version
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// of C++ incompatible with the previous version, you can no longer cast
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// pointers to functions without specifying linkage unless you want to get
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// warnings.
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//
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// This also means that pointers to functions can no longer be "hidden"
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// in opaque types like void * because at the invokation point warnings
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// will be generated. While this makes perfect sense from a type safety
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// point of view it causes a lot of warnings on old code using C header
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// files. Here are some typedefs to make the job of silencing warnings
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// a bit easier.
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//
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// The final kick in the teeth is that you can only have extern "C" linkage
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// specified at file scope. So these typedefs are here rather than in the
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// .hpp for the class (os:Solaris usually) that needs them.
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extern "C" {
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typedef int (*int_fnP_thread_t_iP_uP_stack_tP_gregset_t)(thread_t, int*, unsigned *, stack_t*, gregset_t);
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typedef int (*int_fnP_thread_t_i_gregset_t)(thread_t, int, gregset_t);
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typedef int (*int_fnP_thread_t_i)(thread_t, int);
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typedef int (*int_fnP_thread_t)(thread_t);
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typedef int (*int_fnP_cond_tP_mutex_tP_timestruc_tP)(cond_t *cv, mutex_t *mx, timestruc_t *abst);
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typedef int (*int_fnP_cond_tP_mutex_tP)(cond_t *cv, mutex_t *mx);
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// typedef for missing API in libc
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typedef int (*int_fnP_mutex_tP_i_vP)(mutex_t *, int, void *);
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typedef int (*int_fnP_mutex_tP)(mutex_t *);
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typedef int (*int_fnP_cond_tP_i_vP)(cond_t *cv, int scope, void *arg);
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typedef int (*int_fnP_cond_tP)(cond_t *cv);
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};
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#endif // SOLARIS
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// checking for nanness
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#ifdef SOLARIS
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#ifdef SPARC
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inline int g_isnan(float f) { return isnanf(f); }
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#else
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// isnanf() broken on Intel Solaris use isnand()
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inline int g_isnan(float f) { return isnand(f); }
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#endif
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inline int g_isnan(double f) { return isnand(f); }
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#elif defined(__APPLE__)
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inline int g_isnan(double f) { return isnan(f); }
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#elif defined(LINUX) || defined(_ALLBSD_SOURCE)
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inline int g_isnan(float f) { return isnanf(f); }
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inline int g_isnan(double f) { return isnan(f); }
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#else
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#error "missing platform-specific definition here"
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#endif
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// GCC 4.3 does not allow 0.0/0.0 to produce a NAN value
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#if (__GNUC__ == 4) && (__GNUC_MINOR__ > 2)
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#define CAN_USE_NAN_DEFINE 1
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#endif
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// Checking for finiteness
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inline int g_isfinite(jfloat f) { return isfinite(f); }
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inline int g_isfinite(jdouble f) { return isfinite(f); }
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// Wide characters
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inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }
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// Formatting.
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#ifdef _LP64
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# ifdef __APPLE__
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# define FORMAT64_MODIFIER "ll"
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# else
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# define FORMAT64_MODIFIER "l"
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# endif
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#else // !_LP64
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#define FORMAT64_MODIFIER "ll"
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#endif // _LP64
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// HACK: gcc warns about applying offsetof() to non-POD object or calculating
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// offset directly when base address is NULL. Use 16 to get around the
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// warning. gcc-3.4 has an option -Wno-invalid-offsetof to suppress
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// this warning.
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#define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16)
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#ifdef offsetof
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# undef offsetof
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#endif
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#define offsetof(klass,field) offset_of(klass,field)
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#if defined(_LP64) && defined(__APPLE__)
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#define JLONG_FORMAT "%ld"
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#define JLONG_FORMAT_W(width) "%" #width "ld"
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#endif // _LP64 && __APPLE__
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#define THREAD_LOCAL __thread
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// Inlining support
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#define NOINLINE __attribute__ ((noinline))
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#define ALWAYSINLINE inline __attribute__ ((always_inline))
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// Alignment
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//
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// NOTE! The "+0" below is a workaround for a known bug in older GCC versions
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// (known to fail with 4.6.0, fixed in 4.9.0). This bug affects systems such as
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// RedHat/Oracle Linux 7.5, which ships with GCC 4.8.5. For more details, see
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// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55382 and
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// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53017
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//
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// GCC versions older than 4.6.4 would fail even with "+0", and needs additional
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// cast to __typeof__(x) to work around the similar bug.
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//
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#define ATTRIBUTE_ALIGNED(x) __attribute__((aligned((__typeof__(x))x+0)))
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#endif // SHARE_UTILITIES_GLOBALDEFINITIONS_GCC_HPP
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