linker: add test for zero e_shentsize

Bug: http://b/30166532
Bug: http://b/30795430
Change-Id: I249c081563f0ca7bcc799d8445a53683616eaa4e
Test: run bionic-unit-tests --gtest_filter=dlfcn.dlopen_invalid*
diff --git a/tests/dlfcn_test.cpp b/tests/dlfcn_test.cpp
index 9419bf3..6e78082 100644
--- a/tests/dlfcn_test.cpp
+++ b/tests/dlfcn_test.cpp
@@ -1170,4 +1170,12 @@
   ASSERT_SUBSTR(expected_dlerror.c_str(), dlerror());
 }
 
+TEST(dlfcn, dlopen_invalid_zero_shentsize) {
+  std::string libpath = std::string(getenv("ANDROID_DATA")) + PREBUILT_ELF_PATH + "/libtest_invalid-zero_shentsize.so";
+  void* handle = dlopen(libpath.c_str(), RTLD_NOW);
+  ASSERT_TRUE(handle == nullptr);
+  std::string expected_dlerror = std::string("dlopen failed: \"") + libpath + "\" has unsupported e_shentsize: 0x0 (expected 0x";
+  ASSERT_SUBSTR(expected_dlerror.c_str(), dlerror());
+}
+
 #endif