1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
#include <stdio.h>
#include <sys/time.h>
#include <sys/resource.h>
#include "dld.h"
/* strings to hold the next object file to be linked. On invocation, the
linked-in function will modify this string so that a different file will
be loaded next time. */
char *p = "chain1.o";
/*
* To show how different modules can be overlayed onto the same memory
* sections.
*/
main (argc, argv)
int argc;
char *argv[];
{
struct rusage rusage;
(void) dld_init (argv[0]);
/* Use the max. memory allocation to show that all the dynamically
linked in modules indeed share the (more or less) same memory
sections. Each module contains a large static array. If they are
not overlayed, the max. RSS will increase. */
getrusage (RUSAGE_SELF, &rusage);
printf ("MAX_RSS = %d page.\n", rusage.ru_maxrss);
do {
register void (* func) ();
register int dld_errno;
printf ("Linking %s\n", p);
if (dld_errno = dld_link (p)) {
fprintf (stderr, "Error linking %s -- code = %d\n", p, dld_errno);
dld_perror("");
exit ();
}
getrusage (RUSAGE_SELF, &rusage);
printf ("MAX_RSS = %d page.\n", rusage.ru_maxrss);
if (dld_function_executable_p("chain")) {
func = (void (*) ()) dld_get_func ("chain");
(* func) ();
}
dld_unlink_by_symbol ("chain", 0);
} while (p);
return 0;
}
|
