1 files changed, 146 insertions, 0 deletions
diff --git a/elf/circleload1.c b/elf/circleload1.c
new file mode 100644
index 0000000000..60f8fb5bad
--- /dev/null
+++ b/elf/circleload1.c
@@ -0,0 +1,146 @@
+#include <dlfcn.h>
+#include <libintl.h>
+#include <link.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.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, count = %d\n", lm->l_name, (int) lm->l_opencount);
+      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;
+}
+
+static int
+load_dso (const char **loading, int undef, int flag)
+{
+  void *obj;
+  const char *loaded[] = { NULL, NULL, NULL, NULL };
+  int errors = 0;
+  const char *errstring;
+
+  printf ("\nThis is what is in memory now:\n");
+  errors += check_loaded_objects (loaded);
+
+  printf ("Loading shared object %s: %s\n", loading [0],
+	 flag == RTLD_LAZY ? "RTLD_LAZY" : "RTLD_NOW");
+  obj = dlopen (loading [0], flag);
+  if (obj == NULL)
+    {
+      if (flag == RTLD_LAZY)
+	{
+	  ++errors;
+	  printf ("ERRORS: dlopen shouldn't fail for RTLD_LAZY\n");
+	}
+
+      errstring = dlerror ();
+      if (strstr (errstring, "undefined symbol") == 0
+	  || strstr (errstring, "circlemod2_undefined") == 0)
+	{
+	  ++errors;
+	  printf ("ERRORS: dlopen: `%s': Invalid error string\n",
+		  errstring);
+	}
+      else
+	printf ("dlopen: %s\n", errstring);
+    }
+  else
+    {
+      if (undef && flag == RTLD_NOW)
+	{
+	  ++errors;
+	  printf ("ERRORS: dlopen shouldn't work for RTLD_NOW\n");
+	}
+
+      loaded[0] = loading [0];
+      loaded[1] = loading [1];
+      loaded[2] = loading [2];
+    }
+  errors += check_loaded_objects (loaded);
+
+  if (obj)
+    {
+      printf ("UnLoading shared object %s\n", loading [0]);
+      dlclose (obj);
+      loaded[0] = NULL;
+      loaded[1] = NULL;
+      loaded[2] = NULL;
+      errors += check_loaded_objects (loaded);
+    }
+
+  return errors;
+}
+
+int
+main (void)
+{
+  int errors = 0;
+  const char *loading[3];
+
+  loading [0] = "circlemod1a.so";
+  loading [1] = "circlemod2a.so";
+  loading [2] = "circlemod3a.so";
+  errors += load_dso (loading, 0, RTLD_LAZY);
+  errors += load_dso (loading, 0, RTLD_NOW);
+
+  loading [0] = "circlemod1.so";
+  loading [1] = "circlemod2.so";
+  loading [2] = "circlemod3.so";
+  errors += load_dso (loading, 1, RTLD_LAZY);
+  errors += load_dso (loading, 1, RTLD_NOW);
+
+  if (errors != 0)
+    printf ("%d errors found\n", errors);
+
+  return errors;
+}