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* elf/link.h (link_map): Add l_dev and l_ino.
	* elf/dl-load.c (_dl_map_object_from_fd): Test dev/ino of newly
	loaded shared object with all laoded objects.  Initialize l_ino
	and l_dev in case it's new.
	* elf/rtld.c (dl_main): Explain situation is l_dev/l_ino with main
	object.
	* elf/Makefile: Compile and run new test.
	* elf/multiload.c: New file.
This commit is contained in:
Ulrich Drepper
1999-02-19 00:00:05 +00:00
parent 1a989e004c
commit 61e0617ac3
6 changed files with 128 additions and 5 deletions
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elf/multiload.c Normal file
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#include <dlfcn.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int
main (void)
{
void *a;
void *b;
void *c;
void *d;
char *wd;
char *base;
char *buf;
/* Change to the binary directory. */
if (chdir (OBJDIR) != 0)
{
printf ("cannot change to `%s': %m", OBJDIR);
exit (EXIT_FAILURE);
}
wd = getcwd (NULL, 0);
base = basename (wd);
buf = alloca (strlen (wd) + strlen (base) + 5 + sizeof "testobj1.so");
printf ("loading `%s'\n", "./testobj1.so");
a = dlopen ("./testobj1.so", RTLD_NOW);
if (a == NULL)
{
printf ("cannot load `./testobj1.so': %s\n", dlerror ());
exit (EXIT_FAILURE);
}
stpcpy (stpcpy (stpcpy (buf, "../"), base), "/testobj1.so");
printf ("loading `%s'\n", buf);
b = dlopen (buf, RTLD_NOW);
if (b == NULL)
{
printf ("cannot load `%s': %s\n", buf, dlerror ());
exit (EXIT_FAILURE);
}
stpcpy (stpcpy (buf, wd), "/testobj1.so");
printf ("loading `%s'\n", buf);
c = dlopen (buf, RTLD_NOW);
if (c == NULL)
{
printf ("cannot load `%s': %s\n", buf, dlerror ());
exit (EXIT_FAILURE);
}
stpcpy (stpcpy (stpcpy (stpcpy (buf, wd), "/../"), base), "/testobj1.so");
printf ("loading `%s'\n", buf);
d = dlopen (buf, RTLD_NOW);
if (d == NULL)
{
printf ("cannot load `%s': %s\n", buf, dlerror ());
exit (EXIT_FAILURE);
}
if (a != b || b != c || c != d)
{
puts ("shared object loaded more than once");
exit (EXIT_FAILURE);
}
return 0;
}
int
foo (int a)
{
return a;
}