dump.c

对内存的分配、释放和使用进行检查

/*
 * (c) Copyright 1990 Conor P. Cahill (uunet!virtech!cpcahil).  
 * You may copy, distribute, and use this software as long as this
 * copyright statement is not removed.
 */
#include <stdio.h>
#include "malloc.h"
#include "tostring.h"

/*
 * Function:	malloc_dump()
 *
 * Purpose:	to dump a printed copy of the malloc chain and
 *		associated data elements
 *
 * Arguments:	fd	- file descriptor to write data to
 *
 * Returns:	nothing of any use
 *
 * Narrative:	Just print out all the junk
 *
 * Notes:	This function is implemented using low level calls because
 * 		of the likelyhood that the malloc tree is damaged when it
 *		is called.  (Lots of things in the c library use malloc and
 *		we don't want to get into a catch-22).
 *
 */

#ifndef lint
static
char rcs_hdr[] = "$Id: dump.c,v 1.4 90/05/11 00:13:08 cpcahil Exp $";
#endif


#define ERRSTR	"I/O Error on malloc dump file descriptor\n"

#define WRITEOUT(fd,str,len)	if( write(fd,str,(unsigned)len) != len ) \
				{ \
					(void) write(2,ERRSTR,\
						     (unsigned)strlen(ERRSTR));\
					exit(120); \
				}

malloc_dump(fd)
	int		fd;
{
	char			  buffer[512];
	void			  exit();
	int			  i;
	extern char		* malloc_data_end;
	extern char		* malloc_data_start;
	extern struct mlist 	* malloc_end;
	extern struct mlist	  malloc_start;
	struct mlist 		* ptr;

	WRITEOUT(fd,"MALLOC CHAIN:\n",14);
	WRITEOUT(fd,"-------------------- START ----------------\n",44);

	for(i=0; i < 80; i++)
	{
		buffer[i] = ' ';
	}

	for(ptr = &malloc_start; ptr; ptr = ptr->next)
	{
		(void) tostring(buffer,	   (int)ptr,	     8,	B_HEX,	'0');
		(void) tostring(buffer+9,  (int)ptr->next,   8,	B_HEX,	'0');
		(void) tostring(buffer+18, (int)ptr->prev,   8,	B_HEX,	'0');
		(void) tostring(buffer+27, (int)ptr->flag,  10,	B_HEX,	'0');
		(void) tostring(buffer+38, (int)ptr->s.size, 8,	B_DEC,	' ');
		(void) tostring(buffer+47, (int)ptr->s.size, 8,	B_HEX,	'0');
		(void) tostring(buffer+57, (int)ptr->data,   8,	B_HEX,	'0');
		buffer[46] = '(';
		buffer[55] = ')';
		buffer[65] = '\n';
		WRITEOUT(fd,buffer,66);
	}
	WRITEOUT(fd,"-------------------- DONE -----------------\n",44);

	WRITEOUT(fd,"Malloc start:      ",19);
	(void) tostring(buffer, (int) &malloc_start, 8, B_HEX, '0');
	buffer[8] = '\n';
	WRITEOUT(fd,buffer,9);

	WRITEOUT(fd,"Malloc end:        ", 19);
	(void) tostring(buffer, (int) malloc_end, 8, B_HEX, '0');
	buffer[8] = '\n';
	WRITEOUT(fd,buffer,9);

	WRITEOUT(fd,"Malloc data start: ", 19);
	(void) tostring(buffer, (int) malloc_data_start, 8, B_HEX, '0');
	buffer[8] = '\n';
	WRITEOUT(fd,buffer,9);

	WRITEOUT(fd,"Malloc data end:   ", 19);
	(void) tostring(buffer, (int) malloc_data_end, 8, B_HEX, '0');
	buffer[8] = '\n';
	WRITEOUT(fd,buffer,9);
	
} /* malloc_dump(... */


/*
 * $Log:	dump.c,v $
 * Revision 1.4  90/05/11  00:13:08  cpcahil
 * added copyright statment
 * 
 * Revision 1.3  90/02/24  21:50:07  cpcahil
 * lots of lint fixes
 * 
 * Revision 1.2  90/02/24  17:27:48  cpcahil
 * changed $header to $Id to remove full path from rcs id string
 * 
 * Revision 1.1  90/02/22  23:17:43  cpcahil
 * Initial revision
 * 
 */