1 files changed, 104 insertions, 0 deletions
diff --git a/elf/neededtest.c b/elf/neededtest.c
new file mode 100644
index 0000000..053d552
--- /dev/null
+++ b/elf/neededtest.c
@@ -0,0 +1,104 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dlfcn.h>
+#include <link.h>
+
+static int
+check_loaded_objects (const char **loaded)
+{
+  struct link_map *lm;
+  int n;
+  int *found = NULL;
+  int errors = 0;
+
+  for (n = 0; loaded[n]; n++)
+    /* NOTHING */;
+
+  if (n)
+    {
+      found = (int *) alloca (sizeof (int) * n);
+      memset (found, 0, sizeof (int) * n);
+    }
+
+  printf("   Name\n");
+  printf(" --------------------------------------------------------\n");
+  for (lm = _r_debug.r_map; lm; lm = lm->l_next)
+    {
+      if (lm->l_name && lm->l_name[0])
+	printf(" %s\n", lm->l_name);
+      if (lm->l_type == lt_loaded && lm->l_name)
+	{
+	  int match = 0;
+	  for (n = 0; loaded[n] != NULL; n++)
+	    {
+	      if (strcmp (basename (loaded[n]), basename (lm->l_name)) == 0)
+	        {
+		  found[n] = 1;
+		  match = 1;
+		  break;
+		}
+	    }
+
+	  if (match == 0)
+	    {
+	      ++errors;
+	      printf ("ERRORS: %s is not unloaded\n", lm->l_name);
+	    }
+	}
+    }
+
+  for (n = 0; loaded[n] != NULL; n++)
+    {
+      if (found[n] == 0)
+        {
+	  ++errors;
+	  printf ("ERRORS: %s is not loaded\n", loaded[n]);
+	}
+    }
+
+  return errors;
+}
+
+int
+main (void)
+{
+  void *obj2;
+  void *obj3;
+  const char *loaded[] = { NULL, NULL, NULL, NULL };
+  int errors = 0;
+
+  printf ("\nThis is what is in memory now:\n");
+  errors += check_loaded_objects (loaded);
+  printf( "Loading shared object neededobj3.so\n");
+  obj3 = dlopen( "neededobj3.so", RTLD_LAZY);
+  if (obj3 == NULL)
+    {
+      printf ("%s\n", dlerror ());
+      exit (1);
+    }
+  printf ("And this is what is now in memory\n");
+  loaded[0] = "neededobj1.so";
+  loaded[1] = "neededobj2.so";
+  loaded[2] = "neededobj3.so";
+  errors += check_loaded_objects (loaded);
+  printf ("Now loading shared object neededobj2.so\n");
+  obj2 = dlopen ("neededobj2.so", RTLD_LAZY);
+  if (obj2 == NULL)
+    {
+      printf ("%s\n", dlerror ());
+      exit (1);
+    }
+  printf ("Again, this is what is in memory\n");
+  errors += check_loaded_objects (loaded);
+  printf ("Closing neededobj2.so\n");
+  dlclose (obj2);
+  errors += check_loaded_objects (loaded);
+  printf ("Closing neededobj3.so\n");
+  dlclose (obj3);
+  loaded[0] = NULL;
+  errors += check_loaded_objects (loaded);
+  if (errors != 0)
+    printf ("%d errorss found\n", errors);
+  return errors;
+}