422 lines
9.4 KiB
C
422 lines
9.4 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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typedef enum { t_char, t_short, t_int, t_long, t_double } Type;
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typedef int (*TestFunc)( Type, void* );
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struct Description;
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int IsBigEndian(void);
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int IsStackGrowingDown_2( int * pI );
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int IsStackGrowingDown(void);
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int GetStackAlignment_3( char*p, long l, int i, short s, char b, char c, ... );
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int GetStackAlignment_2( char*p, long l, int i, short s, char b, char c );
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int GetStackAlignment(void);
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void PrintArgs( int p, ... );
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int check( TestFunc func, Type eT, void* p );
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#if defined (UNX) || defined (WNT)
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#ifdef UNX
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#include <unistd.h>
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#endif
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#include <sys/types.h>
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#define I_STDARG
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#ifdef I_STDARG
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#define NO_USE_FORK_TO_CHECK
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#ifdef USE_FORK_TO_CHECK
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#include <sys/wait.h>
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#else
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#include <signal.h>
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#include <setjmp.h>
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#endif
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#else
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#endif
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#define printTypeSize(Type,Name) printf( "sizeof(%s)\t= %d\n", Name, \
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sizeof (Type) )
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#define isSignedType(Type) (((Type)-1) < 0)
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#define printTypeSign(Type,Name) printf( "%s\t= %s %s\n", Name, \
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( isSignedType(Type) ? "unsigned" : "signed" ), Name )
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int IsBigEndian()
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{
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long l = 1;
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return ! *(char*)&l;
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}
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int IsStackGrowingDown_2( int * pI )
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{
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int i = 1;
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return ((unsigned long)&i) < (unsigned long)pI;
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}
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int IsStackGrowingDown()
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{
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int i = 1;
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return IsStackGrowingDown_2(&i);
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}
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int GetStackAlignment_3( char*p, long l, int i, short s, char b, char c, ... )
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{
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(void) p; (void) l; (void) i; (void) s; /* unused */
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if ( IsStackGrowingDown() )
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return &c - &b;
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else
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return &b - &c;
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}
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int GetStackAlignment_2( char*p, long l, int i, short s, char b, char c )
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{
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(void) p; (void) l; (void) i; (void) s; /* unused */
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if ( IsStackGrowingDown() )
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return &c - &b;
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else
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return &b - &c;
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}
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int GetStackAlignment()
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{
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int nStackAlignment = GetStackAlignment_3(0,1,2,3,4,5);
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if ( nStackAlignment != GetStackAlignment_2(0,1,2,3,4,5) )
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printf( "Pascal calling convention\n" );
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return nStackAlignment;
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}
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#if defined (UNX) || defined (WNT)
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#ifdef I_STDARG
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void PrintArgs( int p, ... )
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#else
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void PrintArgs( p, va_alist )
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int p;
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va_dcl
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#endif
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{
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int value;
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va_list ap;
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#ifdef I_STDARG
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va_start( ap, p );
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#else
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va_start( ap );
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#endif
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printf( "value = %d", p );
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while ( ( value = va_arg(ap, int) ) != 0 )
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printf( " %d", value );
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printf( "\n" );
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va_end(ap);
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}
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#ifndef USE_FORK_TO_CHECK
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static jmp_buf check_env;
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static int bSignal;
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void SAL_CALL SignalHandler( int sig )
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{
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bSignal = 1;
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/*
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fprintf( stderr, "Signal %d caught\n", sig );
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signal( sig, SignalHandler );
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*/
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longjmp( check_env, sig );
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}
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#endif
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int check( TestFunc func, Type eT, void* p )
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{
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#ifdef USE_FORK_TO_CHECK
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pid_t nChild = fork();
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if ( nChild )
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{
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int exitVal;
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wait( &exitVal );
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if ( exitVal & 0xff )
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return -1;
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else
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return exitVal >> 8;
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}
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else
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{
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exit( func( eT, p ) );
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}
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#else
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int result;
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bSignal = 0;
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if ( !setjmp( check_env ) )
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{
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signal( SIGSEGV, SignalHandler );
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#ifdef UNX
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signal( SIGBUS, SignalHandler );
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#else
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#endif
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result = func( eT, p );
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signal( SIGSEGV, SIG_DFL );
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#ifdef UNX
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signal( SIGBUS, SIG_DFL );
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#else
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#endif
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}
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if ( bSignal )
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return -1;
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else
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return 0;
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#endif
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}
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#endif
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int GetAtAddress( Type eT, void* p )
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{
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switch ( eT )
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{
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case t_char: return *((char*)p);
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case t_short: return *((short*)p);
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case t_int: return *((int*)p);
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case t_long: return *((long*)p);
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case t_double: return *((double*)p);
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}
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abort();
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}
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int SetAtAddress( Type eT, void* p )
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{
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switch ( eT )
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{
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case t_char: return *((char*)p) = 0;
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case t_short: return *((short*)p) = 0;
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case t_int: return *((int*)p) = 0;
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case t_long: return *((long*)p) = 0;
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case t_double: return *((double*)p)= 0;
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}
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abort();
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}
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char* TypeName( Type eT )
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{
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switch ( eT )
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{
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case t_char: return "char";
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case t_short: return "short";
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case t_int: return "int";
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case t_long: return "long";
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case t_double: return "double";
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}
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abort();
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}
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int CheckGetAccess( Type eT, void* p )
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{
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int b;
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b = -1 != check( (TestFunc)GetAtAddress, eT, p );
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#if OSL_DEBUG_LEVEL > 1
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fprintf( stderr,
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"%s read %s at %p\n",
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(b? "can" : "can not" ), TypeName(eT), p );
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#endif
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return b;
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}
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int CheckSetAccess( Type eT, void* p )
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{
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int b;
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b = -1 != check( (TestFunc)SetAtAddress, eT, p );
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#if OSL_DEBUG_LEVEL > 1
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fprintf( stderr,
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"%s write %s at %p\n",
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(b? "can" : "can not" ), TypeName(eT), p );
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#endif
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return b;
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}
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int GetAlignment( Type eT )
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{
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char a[ 16*8 ];
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int p = (int)(void*)&a;
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int i;
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p = ( p + 0xF ) & ~0xF;
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for ( i = 1; i < 16; i++ )
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if ( CheckGetAccess( eT, (void*)(p+i) ) )
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return i;
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return 0;
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}
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int CheckCharAccess( char* p )
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{
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if ( CheckGetAccess( t_char, p ) )
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printf( "can read address %p\n", p );
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else
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printf( "can not read address %p\n", p );
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if ( CheckSetAccess( t_char, p ) )
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printf( "can write address %p\n", p );
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else
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printf( "can not write address %p\n", p );
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return 0;
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}
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struct Description
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{
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int bBigEndian;
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int bStackGrowsDown;
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int nStackAlignment;
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int nAlignment[3]; /* 2,4,8 */
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};
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void Description_Ctor( struct Description* pThis )
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{
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pThis->bBigEndian = IsBigEndian();
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pThis->bStackGrowsDown = IsStackGrowingDown();
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pThis->nStackAlignment = GetStackAlignment();
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if ( sizeof(short) != 2 )
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abort();
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pThis->nAlignment[0] = GetAlignment( t_short );
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if ( sizeof(int) != 4 )
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abort();
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pThis->nAlignment[1] = GetAlignment( t_int );
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if ( sizeof(double) != 8 )
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abort();
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pThis->nAlignment[2] = GetAlignment( t_double );
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}
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void Description_Print( struct Description* pThis, char* name )
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{
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int i;
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FILE* f = fopen( name, "w" );
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fprintf( f, "#define __%s\n",
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pThis->bBigEndian ? "BIGENDIAN" : "LITTLEENDIAN" );
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for ( i = 0; i < 3; i++ )
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fprintf( f, "#define __ALIGNMENT%d\t%d\n",
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1 << (i+1), pThis->nAlignment[i] );
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fprintf( f, "#define __STACKALIGNMENT wird nicht benutzt\t%d\n", pThis->nStackAlignment );
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fprintf( f, "#define __STACKDIRECTION\t%d\n",
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pThis->bStackGrowsDown ? -1 : 1 );
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fprintf( f, "#define __SIZEOFCHAR\t%d\n", sizeof( char ) );
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fprintf( f, "#define __SIZEOFSHORT\t%d\n", sizeof( short ) );
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fprintf( f, "#define __SIZEOFINT\t%d\n", sizeof( int ) );
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fprintf( f, "#define __SIZEOFLONG\t%d\n", sizeof( long ) );
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fprintf( f, "#define __SIZEOFPOINTER\t%d\n", sizeof( void* ) );
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fprintf( f, "#define __SIZEOFDOUBLE\t%d\n", sizeof( double ) );
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fprintf( f, "#define __IEEEDOUBLE\n" );
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fprintf( f, "#define _SOLAR_NODESCRIPTION\n" );
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fclose(f);
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}
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int SAL_CALL main( int argc, char* argv[] )
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{
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printTypeSign( char, "char" );
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printTypeSign( short, "short" );
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printTypeSign( int, "int" );
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printTypeSign( long, "long" );
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printTypeSize( char, "char" );
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printTypeSize( short, "short" );
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printTypeSize( int, "int" );
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printTypeSize( long, "long" );
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printTypeSize( float, "float" );
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printTypeSize( double, "double" );
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printTypeSize( void *, "void *" );
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if ( IsBigEndian() )
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printf( "BIGENDIAN (Sparc, MC680x0, RS6000)\n" );
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else
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printf( "LITTLEENDIAN (Intel, VAX, PowerPC)\n" );
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if( IsStackGrowingDown() )
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printf( "Stack waechst nach unten\n" );
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else
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printf( "Stack waechst nach oben\n" );
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printf( "STACKALIGNMENT : %d\n", GetStackAlignment() );
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PrintArgs( 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 );
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{
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char a[64];
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int i = 56;
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do
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{
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printf( "Zugriff long auf %i-Aligned Adresse : ", i / 7 );
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printf( ( CheckGetAccess( t_long, (long*)&a[i] ) ? "OK\n" : "ERROR\n" ) );
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i >>= 1;
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} while( i >= 7 );
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}
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{
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char a[64];
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int i = 56;
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do
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{
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printf( "Zugriff double auf %i-Aligned Adresse : ", i / 7 );
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printf( ( CheckGetAccess( t_double, (double*)&a[i] ) ? "OK\n" : "ERROR\n" ) );
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i >>= 1;
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} while( i >= 7 );
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}
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{
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char* p = NULL;
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CheckCharAccess( p );
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p = (char*)&p;
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CheckCharAccess( p );
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}
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if ( argc > 1 )
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{
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struct Description description;
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Description_Ctor( &description );
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Description_Print( &description, argv[1] );
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}
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exit( 0 );
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return 0;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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