1 files changed, 114 insertions, 0 deletions
diff --git a/elf/loadtest.c b/elf/loadtest.c
new file mode 100644
index 0000000..209f420
--- /dev/null
+++ b/elf/loadtest.c
@@ -0,0 +1,114 @@
+#include <assert.h>
+#include <dlfcn.h>
+#include <errno.h>
+#include <error.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+/* How many load/unload operations do we do.  */
+#define TEST_ROUNDS	100
+
+
+static struct
+{
+  /* Name of the module.  */
+  const char *name;
+  /* The handle.  */
+  void *handle;
+} testobjs[] =
+{
+  { "testobj1.so", NULL },
+  { "testobj2.so", NULL },
+  { "testobj3.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 },
+};
+#define NTESTS	(sizeof (tests) / sizeof (tests[0]))
+
+
+int
+main (void)
+{
+  int count = TEST_ROUNDS;
+
+  /* Just a seed.  */
+  srandom (TEST_ROUNDS);
+
+  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'\n", testobjs[index].name);
+	}
+      else
+	{
+	  dlclose (testobjs[index].handle);
+	  testobjs[index].handle = NULL;
+
+	  printf ("successfully unloaded `%s'\n", testobjs[index].name);
+	}
+    }
+
+  /* Unload all loaded modules.  */
+  for (count = 0; count < NOBJS; ++count)
+    if (testobjs[count].handle != NULL)
+      dlclose (testobjs[count].handle);
+
+  return 0;
+}
+
+
+int
+foo (int a)
+{
+  return a - 1;
+}