Test cases for correct unloading.

elf/unload4.c

@@ -0,0 +1,48 @@
+#include <dlfcn.h>
+#include <stdio.h>
+#include <malloc.h>
+
+int
+main (void)
+{
+#ifdef M_PERTURB
+  mallopt (M_PERTURB, 0xaa);
+#endif
+
+  void *h;
+  int (*fn) (int);
+  h = dlopen ("unload4mod1.so", RTLD_LAZY);
+  if (h == NULL)
+    {
+      puts ("1st dlopen failed");
+      return 1;
+    }
+  fn = dlsym (h, "foo");
+  if (fn == NULL)
+    {
+      puts ("dlsym failed");
+      return 1;
+    }
+  int n = fn (10);
+  if (n != 28)
+    {
+      printf ("foo (10) returned %d != 28\n", n);
+      return 1;
+    }
+  dlclose (h);
+  h = dlopen ("unload4mod3.so", RTLD_LAZY);
+  fn = dlsym (h, "mod3fn2");
+  if (fn == NULL)
+    {
+      puts ("second dlsym failed");
+      return 1;
+    }
+  n = fn (10);
+  if (n != 22)
+    {
+      printf ("mod3fn2 (10) returned %d != 22\n", n);
+      return 1;
+    }
+  dlclose (h);
+  return 0;
+}