Improved dlsym tests and fixes to linker
Answers the question: what if dependent library
was preloaded with RTLD_LOCAL flag.
Also add test for RTLD_NEXT within local_group.
Bug: http://b/17512583
Change-Id: I79e081e68b3a8c0ed8980d4275a06515fea94ec9
diff --git a/tests/dlfcn_test.cpp b/tests/dlfcn_test.cpp
index 6b1f109..a5abda7 100644
--- a/tests/dlfcn_test.cpp
+++ b/tests/dlfcn_test.cpp
@@ -71,23 +71,80 @@
void* handle = dlopen("libtest_dlsym_from_this.so", RTLD_LAZY | RTLD_LOCAL);
ASSERT_TRUE(handle != nullptr) << dlerror();
- // check that we cant find '_test_dlsym_symbol' via dlsym(RTLD_DEFAULT)
+ // check that we can't find '_test_dlsym_symbol' via dlsym(RTLD_DEFAULT)
void* symbol = dlsym(RTLD_DEFAULT, "test_dlsym_symbol");
ASSERT_TRUE(symbol == nullptr);
ASSERT_SUBSTR("undefined symbol: test_dlsym_symbol", dlerror());
typedef int* (*fn_t)();
- fn_t fn = reinterpret_cast<fn_t>(dlsym(handle, "lookup_dlsym_symbol_using_RTLD_DEFAULT"));
+ fn_t lookup_dlsym_symbol_using_RTLD_DEFAULT =
+ reinterpret_cast<fn_t>(dlsym(handle, "lookup_dlsym_symbol_using_RTLD_DEFAULT"));
+ ASSERT_TRUE(lookup_dlsym_symbol_using_RTLD_DEFAULT != nullptr) << dlerror();
- ASSERT_TRUE(fn != nullptr) << dlerror();
-
- int* ptr = fn();
+ int* ptr = lookup_dlsym_symbol_using_RTLD_DEFAULT();
ASSERT_TRUE(ptr != nullptr) << dlerror();
ASSERT_EQ(42, *ptr);
+ fn_t lookup_dlsym_symbol2_using_RTLD_DEFAULT =
+ reinterpret_cast<fn_t>(dlsym(handle, "lookup_dlsym_symbol2_using_RTLD_DEFAULT"));
+ ASSERT_TRUE(lookup_dlsym_symbol2_using_RTLD_DEFAULT != nullptr) << dlerror();
+
+ ptr = lookup_dlsym_symbol2_using_RTLD_DEFAULT();
+ ASSERT_TRUE(ptr != nullptr) << dlerror();
+ ASSERT_EQ(44, *ptr);
+
+ fn_t lookup_dlsym_symbol_using_RTLD_NEXT =
+ reinterpret_cast<fn_t>(dlsym(handle, "lookup_dlsym_symbol_using_RTLD_NEXT"));
+ ASSERT_TRUE(lookup_dlsym_symbol_using_RTLD_NEXT != nullptr) << dlerror();
+
+ ptr = lookup_dlsym_symbol_using_RTLD_NEXT();
+ ASSERT_TRUE(ptr != nullptr) << dlerror();
+ ASSERT_EQ(43, *ptr);
+
dlclose(handle);
}
+TEST(dlfcn, dlsym_from_sofile_with_preload) {
+ void* preload = dlopen("libtest_dlsym_from_this_grandchild.so", RTLD_NOW | RTLD_LOCAL);
+ ASSERT_TRUE(preload != nullptr) << dlerror();
+
+ void* handle = dlopen("libtest_dlsym_from_this.so", RTLD_NOW | RTLD_LOCAL);
+ ASSERT_TRUE(handle != nullptr) << dlerror();
+
+ // check that we can't find '_test_dlsym_symbol' via dlsym(RTLD_DEFAULT)
+ void* symbol = dlsym(RTLD_DEFAULT, "test_dlsym_symbol");
+ ASSERT_TRUE(symbol == nullptr);
+ ASSERT_SUBSTR("undefined symbol: test_dlsym_symbol", dlerror());
+
+ typedef int* (*fn_t)();
+ fn_t lookup_dlsym_symbol_using_RTLD_DEFAULT =
+ reinterpret_cast<fn_t>(dlsym(handle, "lookup_dlsym_symbol_using_RTLD_DEFAULT"));
+ ASSERT_TRUE(lookup_dlsym_symbol_using_RTLD_DEFAULT != nullptr) << dlerror();
+
+ int* ptr = lookup_dlsym_symbol_using_RTLD_DEFAULT();
+ ASSERT_TRUE(ptr != nullptr) << dlerror();
+ ASSERT_EQ(42, *ptr);
+
+ fn_t lookup_dlsym_symbol2_using_RTLD_DEFAULT =
+ reinterpret_cast<fn_t>(dlsym(handle, "lookup_dlsym_symbol2_using_RTLD_DEFAULT"));
+ ASSERT_TRUE(lookup_dlsym_symbol2_using_RTLD_DEFAULT != nullptr) << dlerror();
+
+ ptr = lookup_dlsym_symbol2_using_RTLD_DEFAULT();
+ ASSERT_TRUE(ptr != nullptr) << dlerror();
+ ASSERT_EQ(44, *ptr);
+
+ fn_t lookup_dlsym_symbol_using_RTLD_NEXT =
+ reinterpret_cast<fn_t>(dlsym(handle, "lookup_dlsym_symbol_using_RTLD_NEXT"));
+ ASSERT_TRUE(lookup_dlsym_symbol_using_RTLD_NEXT != nullptr) << dlerror();
+
+ ptr = lookup_dlsym_symbol_using_RTLD_NEXT();
+ ASSERT_TRUE(ptr != nullptr) << dlerror();
+ ASSERT_EQ(43, *ptr);
+
+ dlclose(handle);
+ dlclose(preload);
+}
+
TEST(dlfcn, dlsym_with_dependencies) {
void* handle = dlopen("libtest_with_dependency.so", RTLD_NOW);
ASSERT_TRUE(handle != NULL);