6 files changed, 140 insertions, 0 deletions
diff --git a/elf/unload4.c b/elf/unload4.c
new file mode 100644
index 0000000000..6e171a22e0
--- /dev/null
+++ b/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;
+}
diff --git a/elf/unload4mod1.c b/elf/unload4mod1.c
new file mode 100644
index 0000000000..38c5b0168d
--- /dev/null
+++ b/elf/unload4mod1.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+
+extern int bar (int);
+
+int
+foo (int x)
+{
+  puts ("in foo");
+  return bar (x / 2) + 2;
+}
diff --git a/elf/unload4mod2.c b/elf/unload4mod2.c
new file mode 100644
index 0000000000..497ef5d93b
--- /dev/null
+++ b/elf/unload4mod2.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int
+baz (int x)
+{
+  puts ("in baz");
+  return x * 4;
+}
diff --git a/elf/unload4mod3.c b/elf/unload4mod3.c
new file mode 100644
index 0000000000..4b280bc05b
--- /dev/null
+++ b/elf/unload4mod3.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int
+__attribute__((noinline))
+mod3fn1 (int x)
+{
+  puts ("in mod3fn1");
+  return x + 6;
+}
+
+int
+mod3fn2 (int x)
+{
+  puts ("in mod3fn2");
+  return mod3fn1 (x / 2) * 2;
+}
diff --git a/elf/unload4mod4.c b/elf/unload4mod4.c
new file mode 100644
index 0000000000..ba5a144d38
--- /dev/null
+++ b/elf/unload4mod4.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+__attribute__((noinline))
+baz (int x)
+{
+  abort ();
+}
+
+int
+bar (int x)
+{
+  puts ("in bar");
+  return baz (x + 1) + 2;
+}
diff --git a/elf/unload5.c b/elf/unload5.c
new file mode 100644
index 0000000000..0555052ce8
--- /dev/null
+++ b/elf/unload5.c
@@ -0,0 +1,42 @@
+#include <dlfcn.h>
+#include <stdio.h>
+
+int
+main (void)
+{
+  void *g = dlopen ("unload3mod1.so", RTLD_GLOBAL | RTLD_NOW);
+  void *h = dlopen ("unload3mod2.so", RTLD_GLOBAL | RTLD_NOW);
+  if (g == NULL || h == NULL)
+    {
+      printf ("dlopen unload3mod{1,2}.so failed: %p %p\n", g, h);
+      return 1;
+    }
+  dlopen ("unload3mod4.so", RTLD_GLOBAL | RTLD_NOW);
+  dlclose (h);
+  dlclose (g);
+
+  g = dlopen ("unload3mod3.so", RTLD_GLOBAL | RTLD_NOW);
+  h = dlopen ("unload3mod4.so", RTLD_GLOBAL | RTLD_NOW);
+  if (g == NULL || h == NULL)
+    {
+      printf ("dlopen unload3mod{3,4}.so failed: %p %p\n", g, h);
+      return 1;
+    }
+
+  int (*fn) (int);
+  fn = dlsym (h, "bar");
+  if (fn == NULL)
+    {
+      puts ("dlsym failed");
+      return 1;
+    }
+
+  int val = fn (16);
+  if (val != 24)
+    {
+      printf ("bar returned %d != 24\n", val);
+      return 1;
+    }
+
+  return 0;
+}