1 /*
2 * (c) Copyright 1990 Conor P. Cahill (uunet!virtech!cpcahil).
3 * You may copy, distribute, and use this software as long as this
4 * copyright statement is not removed.
5 */
6 #include <stdio.h>
7 #include "malloc.h"
8 #include "tostring.h"
9
10 /*
11 * Function: malloc_dump()
12 *
13 * Purpose: to dump a printed copy of the malloc chain and
14 * associated data elements
15 *
16 * Arguments: fd - file descriptor to write data to
17 *
18 * Returns: nothing of any use
19 *
20 * Narrative: Just print out all the junk
21 *
22 * Notes: This function is implemented using low level calls because
23 * of the likelyhood that the malloc tree is damaged when it
24 * is called. (Lots of things in the c library use malloc and
25 * we don't want to get into a catch-22).
26 *
27 */
28
29 #ifndef lint
30 static
31 char rcs_hdr[] = "$Id: dump.c,v 1.2 2006-07-25 10:07:38 rt Exp $";
32 #endif
33
34
35 #define ERRSTR "I/O Error on malloc dump file descriptor\n"
36
37 #define WRITEOUT(fd,str,len) if( write(fd,str,(unsigned)len) != len ) \
38 { \
39 (void) write(2,ERRSTR,\
40 (unsigned)strlen(ERRSTR));\
41 exit(120); \
42 }
43
44 void
malloc_dump(fd)45 malloc_dump(fd)
46 int fd;
47 {
48 char buffer[512];
49 void exit();
50 int i;
51 extern char * malloc_data_end;
52 extern char * malloc_data_start;
53 extern struct mlist * malloc_end;
54 extern struct mlist malloc_start;
55 struct mlist * ptr;
56
57 WRITEOUT(fd,"MALLOC CHAIN:\n",14);
58 WRITEOUT(fd,"-------------------- START ----------------\n",44);
59
60 for(i=0; i < 80; i++)
61 {
62 buffer[i] = ' ';
63 }
64
65 for(ptr = &malloc_start; ptr; ptr = ptr->next)
66 {
67 (void) tostring(buffer, (int)ptr, 8, B_HEX, '0');
68 (void) tostring(buffer+9, (int)ptr->next, 8, B_HEX, '0');
69 (void) tostring(buffer+18, (int)ptr->prev, 8, B_HEX, '0');
70 (void) tostring(buffer+27, (int)ptr->flag, 10, B_HEX, '0');
71 (void) tostring(buffer+38, (int)ptr->s.size, 8, B_DEC, ' ');
72 (void) tostring(buffer+47, (int)ptr->s.size, 8, B_HEX, '0');
73 (void) tostring(buffer+57, (int)ptr->data, 8, B_HEX, '0');
74 buffer[46] = '(';
75 buffer[55] = ')';
76 buffer[65] = '\n';
77 WRITEOUT(fd,buffer,66);
78 }
79 WRITEOUT(fd,"-------------------- DONE -----------------\n",44);
80
81 WRITEOUT(fd,"Malloc start: ",19);
82 (void) tostring(buffer, (int) &malloc_start, 8, B_HEX, '0');
83 buffer[8] = '\n';
84 WRITEOUT(fd,buffer,9);
85
86 WRITEOUT(fd,"Malloc end: ", 19);
87 (void) tostring(buffer, (int) malloc_end, 8, B_HEX, '0');
88 buffer[8] = '\n';
89 WRITEOUT(fd,buffer,9);
90
91 WRITEOUT(fd,"Malloc data start: ", 19);
92 (void) tostring(buffer, (int) malloc_data_start, 8, B_HEX, '0');
93 buffer[8] = '\n';
94 WRITEOUT(fd,buffer,9);
95
96 WRITEOUT(fd,"Malloc data end: ", 19);
97 (void) tostring(buffer, (int) malloc_data_end, 8, B_HEX, '0');
98 buffer[8] = '\n';
99 WRITEOUT(fd,buffer,9);
100
101 } /* malloc_dump(... */
102
103
104