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#include <assert.h>
#include <dlfcn.h>
#include <errno.h>
#include <error.h>
#include <mcheck.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* How many load/unload operations do we do. */
#define TEST_ROUNDS 1000
static struct
{
/* Name of the module. */
const char *name;
/* The handle. */
void *handle;
} testobjs[] =
{
{ "testobj1.so", NULL },
{ "testobj2.so", NULL },
{ "testobj3.so", NULL },
{ "testobj4.so", NULL },
{ "testobj5.so", NULL },
{ "testobj6.so", NULL },
};
#define NOBJS (sizeof (testobjs) / sizeof (testobjs[0]))
static const struct
{
/* Name of a function to call. */
const char *fname;
/* Index in status and handle array. */
int index;
/* Options while loading the module. */
int options;
} tests[] =
{
{ "obj1func2", 0, RTLD_LAZY },
{ "obj1func1", 0, RTLD_LAZY | RTLD_GLOBAL },
{ "obj1func1", 0, RTLD_NOW, },
{ "obj1func2", 0, RTLD_NOW | RTLD_GLOBAL },
{ "obj2func2", 1, RTLD_LAZY },
{ "obj2func1", 1, RTLD_LAZY | RTLD_GLOBAL, },
{ "obj2func1", 1, RTLD_NOW, },
{ "obj2func2", 1, RTLD_NOW | RTLD_GLOBAL },
{ "obj3func2", 2, RTLD_LAZY },
{ "obj3func1", 2, RTLD_LAZY | RTLD_GLOBAL },
{ "obj3func1", 2, RTLD_NOW },
{ "obj3func2", 2, RTLD_NOW | RTLD_GLOBAL },
{ "obj4func2", 3, RTLD_LAZY },
{ "obj4func1", 3, RTLD_LAZY | RTLD_GLOBAL },
{ "obj4func1", 3, RTLD_NOW },
{ "obj4func2", 3, RTLD_NOW | RTLD_GLOBAL },
{ "obj5func2", 4, RTLD_LAZY },
{ "obj5func1", 4, RTLD_LAZY | RTLD_GLOBAL },
{ "obj5func1", 4, RTLD_NOW },
{ "obj5func2", 4, RTLD_NOW | RTLD_GLOBAL },
{ "obj6func2", 5, RTLD_LAZY },
{ "obj6func1", 5, RTLD_LAZY | RTLD_GLOBAL },
{ "obj6func1", 5, RTLD_NOW },
{ "obj6func2", 5, RTLD_NOW | RTLD_GLOBAL },
};
#define NTESTS (sizeof (tests) / sizeof (tests[0]))
#include <include/link.h>
#define MAPS ((struct link_map *) _r_debug.r_map)
#define OUT \
do \
{ \
for (map = MAPS; map != NULL; map = map->l_next) \
if (map->l_type == lt_loaded) \
printf ("name = \"%s\", direct_opencount = %d\n", \
map->l_name, (int) map->l_direct_opencount); \
fflush (stdout); \
} \
while (0)
int
main (int argc, char *argv[])
{
int debug = argc > 1 && argv[1][0] != '\0';
int count = TEST_ROUNDS;
int result = 0;
struct link_map *map;
mtrace ();
/* Just a seed. */
srandom (TEST_ROUNDS);
if (debug)
{
puts ("in the beginning");
OUT;
}
while (count--)
{
int nr = random () % NTESTS;
int index = tests[nr].index;
printf ("%4d: %4d: ", count + 1, nr);
fflush (stdout);
if (testobjs[index].handle == NULL)
{
int (*fct) (int);
/* Load the object. */
testobjs[index].handle = dlopen (testobjs[index].name,
tests[nr].options);
if (testobjs[index].handle == NULL)
error (EXIT_FAILURE, 0, "cannot load `%s': %s",
testobjs[index].name, dlerror ());
/* Test the function call. */
fct = dlsym (testobjs[index].handle, tests[nr].fname);
if (fct == NULL)
error (EXIT_FAILURE, 0,
"cannot get function `%s' from shared object `%s': %s",
tests[nr].fname, testobjs[index].name, dlerror ());
fct (10);
printf ("successfully loaded `%s', handle %p\n",
testobjs[index].name, testobjs[index].handle);
}
else
{
if (dlclose (testobjs[index].handle) != 0)
{
printf ("failed to close %s\n", testobjs[index].name);
result = 1;
}
else
printf ("successfully unloaded `%s', handle %p\n",
testobjs[index].name, testobjs[index].handle);
testobjs[index].handle = NULL;
if (testobjs[0].handle == NULL
&& testobjs[1].handle == NULL
&& testobjs[5].handle == NULL)
{
/* In this case none of the objects above should be
present. */
for (map = MAPS; map != NULL; map = map->l_next)
if (map->l_type == lt_loaded
&& (strstr (map->l_name, testobjs[0].name) != NULL
|| strstr (map->l_name, testobjs[1].name) != NULL
|| strstr (map->l_name, testobjs[5].name) != NULL))
{
printf ("`%s' is still loaded\n", map->l_name);
result = 1;
}
}
}
if (debug)
OUT;
}
/* Unload all loaded modules. */
for (count = 0; count < (int) NOBJS; ++count)
if (testobjs[count].handle != NULL)
{
printf ("\nclose: %s: l_initfini = %p, l_versions = %p\n",
testobjs[count].name,
((struct link_map *) testobjs[count].handle)->l_initfini,
((struct link_map *) testobjs[count].handle)->l_versions);
if (dlclose (testobjs[count].handle) != 0)
{
printf ("failed to close %s\n", testobjs[count].name);
result = 1;
}
}
/* Check whether all files are unloaded. */
for (map = MAPS; map != NULL; map = map->l_next)
if (map->l_type == lt_loaded)
{
printf ("name = \"%s\", direct_opencount = %d\n",
map->l_name, (int) map->l_direct_opencount);
result = 1;
}
return result;
}
extern int foo (int a);
int
foo (int a)
{
return a - 1;
}
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