/*
* DUMA - Red-Zone memory allocator.
* Copyright (C) 2006 Michael Eddington <meddington@gmail.com>
* Copyright (C) 2002-2008 Hayati Ayguen <h_ayguen@web.de>, Procitec GmbH
* Copyright (C) 1987-1999 Bruce Perens <bruce@perens.com>
* License: GNU GPL (GNU General Public License, see COPYING-GPL)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* FILE CONTENTS:
* internal implementation file
* contains aborting, printing functions with minor system/platform dependencies
*/
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <stdarg.h>
#ifndef WIN32
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/param.h>
#else
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
#include <winbase.h>
#include <io.h>
#ifndef __CYGWIN__
/* already defined in cygwin headers */
typedef LPVOID caddr_t;
#else
/* use these for cygwin */
#include <unistd.h>
#include <fcntl.h>
#endif
#endif
#ifdef _MSC_VER
#include <crtdbg.h>
#endif
#include "duma.h"
#include "noduma.h"
#include "print.h"
/*
* NBBY is the number of bits per byte. Some systems define it in <sys/param.h>
*/
#ifndef NBBY
#define NBBY 8
#endif
/*
* These routines do their printing without using stdio. Stdio can't
* be used because it calls malloc(). Internal routines of a malloc()
* debugger should not re-enter malloc(), so stdio is out.
*/
/* define prototypes / forward declarations */
static int sprintAddr(char* dest, DUMA_ADDR addr, DUMA_ADDR base);
static int sprintLong(char* dest, long number, long base);
static int DUMA_vsprintf(char* buffer, const char *pattern, va_list args);
/*
* NUMBER_BUFFER_SIZE is the longest character string that could be needed
* to represent an unsigned integer, assuming we might print in base 2.
* Any other representation (base 10 or 16) will need less characters.
*/
#define NUMBER_BUFFER_SIZE (sizeof(DUMA_ADDR) * NBBY)
#define STRING_BUFFER_SIZE 4096
/* Function: sprintAddr
*
* internal function to print a DUMA_ADDR into a buffer
*/
static int sprintAddr(char* dest, DUMA_ADDR value, DUMA_ADDR base)
{
char buffer[NUMBER_BUFFER_SIZE+1];
char * s = &buffer[NUMBER_BUFFER_SIZE];
int size;
DUMA_ADDR digit;
do
{
if ( --s == buffer )
DUMA_Abort("Internal error printing number.");
digit = value % base;
*s = (char)( (digit < 10) ? ('0' + digit) : ('a' + digit -10) );
} while ( (value /= base) > 0 );
size = &buffer[NUMBER_BUFFER_SIZE] - s;
buffer[NUMBER_BUFFER_SIZE] = '\0';
strcpy(dest, s);
return size;
}
/* Function: sprintLong
*
* internal function to print a int into a buffer
*/
static int sprintLong(char* dest, long value, long base)
{
char buffer[NUMBER_BUFFER_SIZE+1];
char * s = &buffer[NUMBER_BUFFER_SIZE];
long size;
long digit;
do
{
if ( --s == buffer )
DUMA_Abort("Internal error printing number.");
digit = value % base;
*s = (char)( (digit < 10) ? ('0' + digit) : ('a' + digit -10) );
} while ( (value /= base) > 0 );
size = &buffer[NUMBER_BUFFER_SIZE] - s;
buffer[NUMBER_BUFFER_SIZE] = '\0';
strcpy(dest, s);
return size;
}
/* Function: DUMA_vsprintf
*
* internal function to print a formatted string into a buffer
* int sprintf(char* buffer, const char *pattern, va_list args)
* allowed format specifier are:
*
* %a = adress of type DUMA_ADDR
* %x = adress of type DUMA_ADDR
* %d = unsigned of type DUMA_SIZE
* %i = int
* %l = long
* %s = string teminated with '\0'
* %c = char
*/
static int DUMA_vsprintf(char* buffer, const char *pattern, va_list args)
{
char c;
static const char bad_pattern[] = "\nDUMA: Bad pattern specifier %%%c in DUMA_Print().\n";
const char * s = pattern;
int len = 0;
DUMA_ADDR n;
c = *s++;
while ( c )
{
if ( c == '%' )
{
c = *s++;
switch ( c )
{
case '%':
buffer[len++] = c;
break;
case 'a': /* DUMA_ADDR */
case 'x': /* DUMA_ADDR */
/*
* Print an address passed as a void pointer.
* The type of DUMA_ADDR must be set so that
* it is large enough to contain all of the
* bits of a void pointer.
*/
n = va_arg(args, DUMA_ADDR);
len += sprintAddr(&buffer[len], n, 16);
break;
case 'd': /* DUMA_SIZE */
n = va_arg(args, DUMA_SIZE);
len += sprintAddr(&buffer[len], n, 10);
break;
case 'i': /* int */
{
long n = (long)va_arg(args, int);
if ( n < 0 )
{
buffer[len++] = '-';
n = -n;
}
len += sprintLong(&buffer[len], n, 10);
break;
}
case 'l': /* long */
{
long n = va_arg(args, long);
if ( n < 0 )
{
buffer[len++] = '-';
n = -n;
}
len += sprintLong(&buffer[len], n, 10);
break;
}
case 's': /* string */
{
const char * string;
size_t length;
string = va_arg(args, char *);
if (string)
{
length = strlen(string);
strcpy(&buffer[len], string);
}
else
{
length = 4; /* = strlen("NULL") */
strcpy(&buffer[len], "NULL");
}
len += length;
break;
}
case 'c': /* char */
/* characters are passed as int ! */
buffer[len++] = (char)va_arg(args, int);
break;
default:
DUMA_Print(bad_pattern, c);
}
}
else /* if ( c != '%' ) */
buffer[len++] = c;
c = *s++;
} /* end while (c) */
buffer[len] = '\0';
return len;
}
/* Function: DUMA_Abort
*
* external abort function
* on Visual C++ it additionally prints to Debug Output of the IDE
* void DUMA_Abort(const char * pattern, ...)
*/
void
DUMA_Abort(const char * pattern, ...)
{
char buffer[STRING_BUFFER_SIZE];
int lena, lenb;
va_list args;
va_start(args, pattern);
strcpy(buffer, "\nDUMA Aborting: ");
lena = strlen(buffer);
lenb = DUMA_vsprintf(&buffer[lena], pattern, args);
strcat(buffer, "\n");
DUMA_Print("%s", buffer);
va_end(args);
#ifndef WIN32
/*
* I use kill(getpid(), SIGILL) instead of abort() because some
* mis-guided implementations of abort() flush stdio, which can
* cause malloc() or free() to be called.
*/
kill(getpid(), SIGILL);
#else
/* Windows doesn't have a kill() */
abort();
#endif
/* Just in case something handles SIGILL and returns, exit here. */
_exit(-1);
}
/* Function: DUMA_Print
*
* external print function
* on Visual C++ it additionally prints to Debug Output of the IDE
* void DUMA_Print(const char * pattern, ...)
*/
void
DUMA_Print(const char * pattern, ...)
{
char buffer[STRING_BUFFER_SIZE];
int len, fd;
va_list args;
va_start(args, pattern);
len = DUMA_vsprintf(buffer, pattern, args);
va_end(args);
#ifdef WIN32
if(DUMA_OUTPUT_DEBUG)
OutputDebugString(buffer);
#endif
if(DUMA_OUTPUT_STDOUT)
write(1, buffer, len);
if(DUMA_OUTPUT_STDERR)
write(2, buffer, len);
if(DUMA_OUTPUT_FILE != NULL)
{
#if defined(WIN32) && !defined(__CYGWIN__)
fd = _open(DUMA_OUTPUT_FILE, _O_APPEND|_O_CREAT|_O_WRONLY);
#else
fd = open(DUMA_OUTPUT_FILE, O_APPEND|O_CREAT|O_WRONLY);
#endif
if ( fd >= 0 )
{
write(fd, buffer, len);
#if defined(WIN32) && !defined(__CYGWIN__)
_close(fd);
#else
close(fd);
#endif
}
}
}
/* Function: DUMA_Exit
*
* external exit function
* on Visual C++ it additionally prints to Debug Output of the IDE
* void DUMA_Exit(const char * pattern, ...)
*/
void
DUMA_Exit(const char * pattern, ...)
{
char buffer[STRING_BUFFER_SIZE];
int lena, lenb;
va_list args;
va_start(args, pattern);
strcpy(buffer, "\nDUMA Exiting: ");
lena = strlen(buffer);
lenb = DUMA_vsprintf(&buffer[lena], pattern, args);
strcat(buffer, "\n");
DUMA_Print("%s", buffer);
#ifdef WIN32
if(DUMA_OUTPUT_DEBUG)
OutputDebugString(buffer);
#endif
va_end(args);
/*
* I use _exit() because the regular exit() flushes stdio,
* which may cause malloc() or free() to be called.
*/
_exit(-1);
}
/* Function: DUMA_sprintf */
void
DUMA_sprintf(char* buffer, const char * pattern, ...)
{
int len;
va_list args;
va_start(args, pattern);
len = DUMA_vsprintf(buffer, pattern, args);
va_end(args);
if (len <= 0)
buffer[0] = 0;
}
const char *
DUMA_strerror(int duma_errno)
{
static char acStrError[STRING_BUFFER_SIZE];
DUMA_sprintf(acStrError, "System Error Number 'errno' from Standard C Library is %i\n", duma_errno);
return acStrError;
}
/* end */