Fix greylist exception to account for linked namespaces
Do not load second copy of libraries that are supposed to
be provided by linked namespaces. Also do not print
error in the log if caller tries to open shared library
using absolute path for apps targeting N+.
Bug: http://b/35454141
Bug: http://b/26833548
Bug: http://b/35338922
Test: run bionic-unit-tests --gtest_filter=dl*
Change-Id: Icf3aeedff18d287d2ba0b3df3808b100f3ef5f7a
diff --git a/tests/dlext_test.cpp b/tests/dlext_test.cpp
index 17e1a48..808b708 100644
--- a/tests/dlext_test.cpp
+++ b/tests/dlext_test.cpp
@@ -917,12 +917,19 @@
extinfo.flags = ANDROID_DLEXT_USE_NAMESPACE;
extinfo.library_namespace = ns;
+ // An app targeting M can open libnativehelper.so because it's on the greylist.
android_set_application_target_sdk_version(__ANDROID_API_M__);
void* handle = android_dlopen_ext("libnativehelper.so", RTLD_NOW, &extinfo);
ASSERT_TRUE(handle != nullptr) << dlerror();
+ // Check that loader did not load another copy of libdl.so while loading greylisted library.
+ void* dlsym_ptr = dlsym(handle, "dlsym");
+ ASSERT_TRUE(dlsym_ptr != nullptr) << dlerror();
+ ASSERT_EQ(&dlsym, dlsym_ptr);
+
dlclose(handle);
+ // An app targeting N no longer has the greylist.
android_set_application_target_sdk_version(__ANDROID_API_N__);
handle = android_dlopen_ext("libnativehelper.so", RTLD_NOW, &extinfo);
ASSERT_TRUE(handle == nullptr);