Mercurial > hg > graal-compiler
view src/share/vm/utilities/globalDefinitions_gcc.hpp @ 477:24fda36852ce
6727377: VM stack guard pages on Windows should PAGE_READWRITE not PAGE_EXECUTE_READWRITE
Summary: Make reguard_stack change access to RW, not execute and use os::protect_memory with the new parameter when change needed to X.
Reviewed-by: acorn, jcoomes
author | coleenp |
---|---|
date | Wed, 10 Dec 2008 15:14:29 -0800 |
parents | a61af66fc99e |
children | db4caa99ef11 |
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/* * Copyright 1998-2007 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ // This file holds compiler-dependent includes, // globally used constants & types, class (forward) // declarations and a few frequently used utility functions. #include <ctype.h> #include <string.h> #include <stdarg.h> #include <stddef.h> #include <stdio.h> #include <stdlib.h> #include <wchar.h> #ifdef SOLARIS #include <ieeefp.h> #endif // SOLARIS #include <math.h> #ifndef FP_PZERO // Linux doesn't have positive/negative zero #define FP_PZERO FP_ZERO #endif #if (!defined fpclass) && ((!defined SPARC) || (!defined SOLARIS)) #define fpclass fpclassify #endif #include <time.h> #include <fcntl.h> #include <dlfcn.h> #include <pthread.h> #ifdef SOLARIS #include <thread.h> #endif // SOLARIS #include <limits.h> #include <errno.h> #ifdef SOLARIS #include <sys/trap.h> #include <sys/regset.h> #include <sys/procset.h> #include <ucontext.h> #include <setjmp.h> #endif // SOLARIS # ifdef SOLARIS_MUTATOR_LIBTHREAD # include <sys/procfs.h> # endif #ifdef LINUX #include <inttypes.h> #include <signal.h> #include <ucontext.h> #include <sys/time.h> #endif // LINUX // 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures // When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in // system header files. On 32-bit architectures, there is no problem. // On 64-bit architectures, defining NULL as a 32-bit constant can cause // problems with varargs functions: C++ integral promotion rules say for // varargs, we pass the argument 0 as an int. So, if NULL was passed to a // varargs function it will remain 32-bits. Depending on the calling // convention of the machine, if the argument is passed on the stack then // only 32-bits of the "NULL" pointer may be initialized to zero. The // other 32-bits will be garbage. If the varargs function is expecting a // pointer when it extracts the argument, then we have a problem. // // Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0. // // Note: this fix doesn't work well on Linux because NULL will be overwritten // whenever a system header file is included. Linux handles NULL correctly // through a special type '__null'. #ifdef SOLARIS #ifdef _LP64 #undef NULL #define NULL 0L #else #ifndef NULL #define NULL 0 #endif #endif #endif // NULL vs NULL_WORD: // On Linux NULL is defined as a special type '__null'. Assigning __null to // integer variable will cause gcc warning. Use NULL_WORD in places where a // pointer is stored as integer value. On some platforms, sizeof(intptr_t) > // sizeof(void*), so here we want something which is integer type, but has the // same size as a pointer. #ifdef LINUX #ifdef _LP64 #define NULL_WORD 0L #else #define NULL_WORD 0 #endif #else #define NULL_WORD NULL #endif #ifndef LINUX // Compiler-specific primitive types typedef unsigned short uint16_t; #ifndef _UINT32_T #define _UINT32_T typedef unsigned int uint32_t; #endif // _UINT32_T #if !defined(_SYS_INT_TYPES_H) #ifndef _UINT64_T #define _UINT64_T typedef unsigned long long uint64_t; #endif // _UINT64_T // %%%% how to access definition of intptr_t portably in 5.5 onward? typedef int intptr_t; typedef unsigned int uintptr_t; // If this gets an error, figure out a symbol XXX that implies the // prior definition of intptr_t, and add "&& !defined(XXX)" above. #endif // _SYS_INT_TYPES_H #endif // !LINUX // Additional Java basic types typedef uint8_t jubyte; typedef uint16_t jushort; typedef uint32_t juint; typedef uint64_t julong; //---------------------------------------------------------------------------------------------------- // Special (possibly not-portable) casts // Cast floats into same-size integers and vice-versa w/o changing bit-pattern // %%%%%% These seem like standard C++ to me--how about factoring them out? - Ungar inline jint jint_cast (jfloat x) { return *(jint* )&x; } inline jlong jlong_cast (jdouble x) { return *(jlong* )&x; } inline jfloat jfloat_cast (jint x) { return *(jfloat* )&x; } inline jdouble jdouble_cast(jlong x) { return *(jdouble*)&x; } //---------------------------------------------------------------------------------------------------- // Constant for jlong (specifying an long long canstant is C++ compiler specific) // Build a 64bit integer constant #define CONST64(x) (x ## LL) #define UCONST64(x) (x ## ULL) const jlong min_jlong = CONST64(0x8000000000000000); const jlong max_jlong = CONST64(0x7fffffffffffffff); #ifdef SOLARIS //---------------------------------------------------------------------------------------------------- // ANSI C++ fixes // NOTE:In the ANSI committee's continuing attempt to make each version // of C++ incompatible with the previous version, you can no longer cast // pointers to functions without specifying linkage unless you want to get // warnings. // // This also means that pointers to functions can no longer be "hidden" // in opaque types like void * because at the invokation point warnings // will be generated. While this makes perfect sense from a type safety // point of view it causes a lot of warnings on old code using C header // files. Here are some typedefs to make the job of silencing warnings // a bit easier. // // The final kick in the teeth is that you can only have extern "C" linkage // specified at file scope. So these typedefs are here rather than in the // .hpp for the class (os:Solaris usually) that needs them. extern "C" { typedef int (*int_fnP_thread_t_iP_uP_stack_tP_gregset_t)(thread_t, int*, unsigned *, stack_t*, gregset_t); typedef int (*int_fnP_thread_t_i_gregset_t)(thread_t, int, gregset_t); typedef int (*int_fnP_thread_t_i)(thread_t, int); typedef int (*int_fnP_thread_t)(thread_t); typedef int (*int_fnP_cond_tP_mutex_tP_timestruc_tP)(cond_t *cv, mutex_t *mx, timestruc_t *abst); typedef int (*int_fnP_cond_tP_mutex_tP)(cond_t *cv, mutex_t *mx); // typedef for missing API in libc typedef int (*int_fnP_mutex_tP_i_vP)(mutex_t *, int, void *); typedef int (*int_fnP_mutex_tP)(mutex_t *); typedef int (*int_fnP_cond_tP_i_vP)(cond_t *cv, int scope, void *arg); typedef int (*int_fnP_cond_tP)(cond_t *cv); }; #endif // SOLARIS //---------------------------------------------------------------------------------------------------- // Debugging #define DEBUG_EXCEPTION ::abort(); extern "C" void breakpoint(); #define BREAKPOINT ::breakpoint() // checking for nanness #ifdef SOLARIS #ifdef SPARC inline int g_isnan(float f) { return isnanf(f); } #else // isnanf() broken on Intel Solaris use isnand() inline int g_isnan(float f) { return isnand(f); } #endif inline int g_isnan(double f) { return isnand(f); } #elif LINUX inline int g_isnan(float f) { return isnanf(f); } inline int g_isnan(double f) { return isnan(f); } #else #error "missing platform-specific definition here" #endif // Checking for finiteness inline int g_isfinite(jfloat f) { return finite(f); } inline int g_isfinite(jdouble f) { return finite(f); } // Wide characters inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); } // Portability macros #define PRAGMA_INTERFACE #pragma interface #define PRAGMA_IMPLEMENTATION #pragma implementation #define VALUE_OBJ_CLASS_SPEC #if (__GNUC__ == 2) && (__GNUC_MINOR__ < 95) #define TEMPLATE_TABLE_BUG #endif #if (__GNUC__ == 2) && (__GNUC_MINOR__ >= 96) #define CONST_SDM_BUG #endif // Formatting. #ifdef _LP64 #define FORMAT64_MODIFIER "l" #else // !_LP64 #define FORMAT64_MODIFIER "ll" #endif // _LP64 // HACK: gcc warns about applying offsetof() to non-POD object or calculating // offset directly when base address is NULL. Use 16 to get around the // warning. gcc-3.4 has an option -Wno-invalid-offsetof to suppress // this warning. #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16) #ifdef offsetof # undef offsetof #endif #define offsetof(klass,field) offset_of(klass,field)