This patch adds a new third-party library that implements an ELF dynamic linker.

third_party/crazy_linker/crazy_linker/tests/zoo.cpp

Index: third_party/crazy_linker/crazy_linker/tests/zoo.cpp
diff --git a/third_party/crazy_linker/crazy_linker/tests/zoo.cpp b/third_party/crazy_linker/crazy_linker/tests/zoo.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..cedb213fba6f23de0384b22f3a18e255a8d8304f
--- /dev/null
+++ b/third_party/crazy_linker/crazy_linker/tests/zoo.cpp
@@ -0,0 +1,36 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <dlfcn.h>
+#include <stdio.h>
+
+extern "C" bool Zoo() {
+  printf("%s: Entering\n", __FUNCTION__);
+  void* bar_lib = dlopen("libbar.so", RTLD_NOW);
+  if (!bar_lib) {
+    fprintf(stderr, "Could not libbar.so: %s\n", dlerror());
+    return false;
+  }
+  printf("%s: Opened libbar.so @%p\n", __FUNCTION__, bar_lib);
+
+
+  void (*bar_func)();
+
+  bar_func = reinterpret_cast<void(*)()>(dlsym(bar_lib, "Bar"));
+  if (!bar_func) {
+    fprintf(stderr, "Could not find 'Bar' symbol in libbar.so\n");
+    return false;
+  }
+  printf("%s: Found 'Bar' symbol at @%p\n", __FUNCTION__, bar_func);
+
+  // Call it.
+  printf("%s: Calling Bar()\n", __FUNCTION__);
+  (*bar_func)();
+
+  printf("%s: Closing libbar.so\n", __FUNCTION__);
+  dlclose(bar_lib);
+
+  printf("%s: Exiting\n", __FUNCTION__);
+  return true;
+}