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Tests: Add test for dlsym(RTLD_DEFAULT) for symbols from dlopen'd libs

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This broke with recent changes to library loading and mapping order.
This commit is contained in:
Andrew Kaster 2022-06-24 01:59:34 -06:00 • committed by Linus Groh
parent 6732fec8b8
commit a0eb0a275d
2 changed files with 29 additions and 1 deletions
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9
Tests/LibELF/CMakeLists.txt
View file

@ -1,3 +1,4 @@
set(CMAKE_SKIP_RPATH FALSE)
macro(add_dlopen_lib NAME FUNCTION) macro(add_dlopen_lib NAME FUNCTION)
add_library(${NAME} SHARED Dynlib.cpp) add_library(${NAME} SHARED Dynlib.cpp)
target_compile_definitions(${NAME} PRIVATE -DFUNCTION=${FUNCTION}) target_compile_definitions(${NAME} PRIVATE -DFUNCTION=${FUNCTION})
@ -6,11 +7,17 @@ macro(add_dlopen_lib NAME FUNCTION)
# Avoid execution by the test runner # Avoid execution by the test runner
install(TARGETS ${NAME} install(TARGETS ${NAME}
DESTINATION usr/Tests/LibELF DESTINATION usr/Tests/LibELF
PERMISSIONS OWNER_READ GROUP_READ WORLD_READ) PERMISSIONS OWNER_READ GROUP_READ WORLD_READ OWNER_WRITE GROUP_WRITE)
endmacro() endmacro()
add_dlopen_lib(DynlibA dynliba_function) add_dlopen_lib(DynlibA dynliba_function)
add_dlopen_lib(DynlibB dynlibb_function) add_dlopen_lib(DynlibB dynlibb_function)
add_dlopen_lib(DynlibC dynlibc_function)
set(CMAKE_INSTALL_RPATH $ORIGIN)
add_dlopen_lib(DynlibD dynlibd_function)
target_link_libraries(DynlibD DynlibC)
unset(CMAKE_INSTALL_RPATH)
set(TEST_SOURCES set(TEST_SOURCES
test-elf.cpp test-elf.cpp
TestDlOpen.cpp TestDlOpen.cpp

21
Tests/LibELF/TestDlOpen.cpp
View file

@ -23,3 +23,24 @@ TEST_CASE(test_dlopen)
EXPECT_NE(func_b, nullptr); EXPECT_NE(func_b, nullptr);
EXPECT_EQ(0, func_b()); EXPECT_EQ(0, func_b());
} }
TEST_CASE(test_dlsym_rtld_default)
{
auto libd = dlopen("/usr/Tests/LibELF/libDynlibD.so", 0);
EXPECT_NE(libd, nullptr);
if (libd == nullptr) {
warnln("can't open libDynlibD.so, {}", dlerror());
return;
}
typedef int (*dynlib_func_t)();
dynlib_func_t func_c = (dynlib_func_t)dlsym(RTLD_DEFAULT, "dynlibc_function");
EXPECT_NE(func_c, nullptr);
EXPECT_EQ(0, func_c());
dynlib_func_t func_d = (dynlib_func_t)dlsym(RTLD_DEFAULT, "dynlibd_function");
EXPECT_NE(func_d, nullptr);
EXPECT_EQ(0, func_d());
dlclose(libd);
}