Load library using file handle.

 * This patch enables dlopen by file descriptor
   instead of path/name.

Bug: 15984217
Change-Id: Ib39051e00567fb97070bf96d8ce63993877c0a01
diff --git a/tests/Android.build.mk b/tests/Android.build.mk
index 62e9718..bb00648 100644
--- a/tests/Android.build.mk
+++ b/tests/Android.build.mk
@@ -26,6 +26,11 @@
 ifneq ($(findstring LIBRARY, $(build_target)),LIBRARY)
     LOCAL_MODULE_STEM_32 := $(module)32
     LOCAL_MODULE_STEM_64 := $(module)64
+else
+ifeq ($($(module)_install_to_out_data),true)
+    LOCAL_MODULE_PATH_32 := $(TARGET_OUT_DATA_NATIVE_TESTS)/$(module)
+    LOCAL_MODULE_PATH_64 := $(TARGET_OUT_DATA_NATIVE_TESTS)64/$(module)
+endif
 endif
 
 LOCAL_CLANG := $($(module)_clang_$(build_type))
diff --git a/tests/dlext_test.cpp b/tests/dlext_test.cpp
index b56fc41..da63046 100644
--- a/tests/dlext_test.cpp
+++ b/tests/dlext_test.cpp
@@ -45,6 +45,11 @@
 #define LIBNAME_NORELRO "libdlext_test_norelro.so"
 #define LIBSIZE 1024*1024 // how much address space to reserve for it
 
+#if defined(__LP64__)
+#define LIBPATH "%s/nativetest64/libdlext_test_fd/libdlext_test_fd.so"
+#else
+#define LIBPATH "%s/nativetest/libdlext_test_fd/libdlext_test_fd.so"
+#endif
 
 class DlExtTest : public ::testing::Test {
 protected:
@@ -83,6 +88,23 @@
   EXPECT_EQ(4, f());
 }
 
+TEST_F(DlExtTest, ExtInfoUseFd) {
+  const char* android_data = getenv("ANDROID_DATA");
+  ASSERT_TRUE(android_data != NULL);
+  char lib_path[PATH_MAX];
+  snprintf(lib_path, sizeof(lib_path), LIBPATH, android_data);
+
+  android_dlextinfo extinfo;
+  extinfo.flags = ANDROID_DLEXT_USE_LIBRARY_FD;
+  extinfo.library_fd = TEMP_FAILURE_RETRY(open(lib_path, O_RDONLY | O_CLOEXEC));
+  ASSERT_TRUE(extinfo.library_fd != -1);
+  handle_ = android_dlopen_ext(lib_path, RTLD_NOW, &extinfo);
+  ASSERT_DL_NOTNULL(handle_);
+  fn f = reinterpret_cast<fn>(dlsym(handle_, "getRandomNumber"));
+  ASSERT_DL_NOTNULL(f);
+  EXPECT_EQ(4, f());
+}
+
 TEST_F(DlExtTest, Reserved) {
   void* start = mmap(NULL, LIBSIZE, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS,
                      -1, 0);
diff --git a/tests/libs/Android.mk b/tests/libs/Android.mk
index efce5b5..a374e48 100644
--- a/tests/libs/Android.mk
+++ b/tests/libs/Android.mk
@@ -78,6 +78,19 @@
 include $(TEST_PATH)/Android.build.mk
 
 # -----------------------------------------------------------------------------
+# Library used by dlext tests - different name non-default location
+# -----------------------------------------------------------------------------
+libdlext_test_fd_src_files := \
+    dlext_test_library.cpp \
+
+libdlext_test_fd_install_to_out_data := true
+module := libdlext_test_fd
+module_tag := optional
+build_type := target
+build_target := SHARED_LIBRARY
+include $(TEST_PATH)/Android.build.mk
+
+# -----------------------------------------------------------------------------
 # Library used by dlfcn tests
 # -----------------------------------------------------------------------------
 libtest_simple_src_files := \