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Add test for module constructors, destructors and TLS callbacks
This commit is contained in:
Luca Bacci
parent
af0a9489e7
commit
683991d836
251
glib/tests/constructor.c
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251
glib/tests/constructor.c
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/* constructor.c - Test for constructors
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*
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* Copyright © 2023 Luca Bacci
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <glib.h>
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#include "../gconstructorprivate.h"
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#ifndef _WIN32
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#include <dlfcn.h>
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#else
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#include <windows.h>
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#endif
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#define LIB_PREFIX "lib_"
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#define APP_PREFIX "app_"
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#ifdef BUILD_LIBRARY
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#define PREFIX LIB_PREFIX
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#else
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#define PREFIX APP_PREFIX
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#endif
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#if G_HAS_CONSTRUCTORS
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#ifdef G_DEFINE_CONSTRUCTOR_NEEDS_PRAGMA
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#pragma G_DEFINE_CONSTRUCTOR_PRAGMA_ARGS (ctor)
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#endif
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G_DEFINE_CONSTRUCTOR (ctor)
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static void
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ctor (void)
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{
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const char *string = PREFIX "ctor";
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g_assert_null (g_getenv (string));
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g_setenv (string, "1", FALSE);
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}
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#ifdef G_DEFINE_DESTRUCTOR_NEEDS_PRAGMA
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#pragma G_DEFINE_DESTRUCTOR_PRAGMA_ARGS (dtor)
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#endif
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G_DEFINE_DESTRUCTOR (dtor)
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static void
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dtor (void)
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{
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const char *string = PREFIX "dtor";
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g_assert_null (g_getenv (string));
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g_setenv (string, "1", FALSE);
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}
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#endif /* G_HAS_CONSTRUCTORS */
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#if defined (_WIN32) && defined (G_HAS_TLS_CALLBACKS)
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extern IMAGE_DOS_HEADER __ImageBase;
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static inline HMODULE
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this_module (void)
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{
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return (HMODULE) &__ImageBase;
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}
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G_DEFINE_TLS_CALLBACK (tls_callback)
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static void NTAPI
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tls_callback (PVOID hInstance,
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DWORD dwReason,
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LPVOID lpvReserved)
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{
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/* The HINSTANCE we get must match the address of __ImageBase */
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g_assert_true (hInstance == this_module ());
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#ifndef BUILD_LIBRARY
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/* Yes, we can call GetModuleHandle (NULL) with the loader lock */
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g_assert_true (hInstance == GetModuleHandle (NULL));
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#endif
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switch (dwReason)
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{
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case DLL_PROCESS_ATTACH:
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{
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const char *string = PREFIX "tls_cb_process_attach";
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#ifdef BUILD_LIBRARY
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/* the library is explicitly loaded */
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g_assert_null (lpvReserved);
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#endif
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g_assert_null (g_getenv (string));
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g_setenv (string, "1", FALSE);
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}
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break;
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case DLL_THREAD_ATTACH:
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break;
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case DLL_THREAD_DETACH:
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break;
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case DLL_PROCESS_DETACH:
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#ifdef BUILD_LIBRARY
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{
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const char *string = PREFIX "tls_cb_process_detach";
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/* the library is explicitly unloaded */
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g_assert_null (lpvReserved);
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g_assert_null (g_getenv (string));
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g_setenv (string, "1", FALSE);
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}
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#endif
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break;
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default:
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g_assert_not_reached ();
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break;
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}
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}
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#endif /* _WIN32 && G_HAS_TLS_CALLBACKS */
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#ifndef BUILD_LIBRARY
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void *library;
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static void
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load_library (const char *library_path)
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{
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#ifndef _WIN32
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library = dlopen (library_path, RTLD_LAZY);
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if (!library)
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g_error ("%s (%s) failed: %s", "dlopen", library_path, dlerror ());
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#else
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wchar_t *library_path_u16 = g_utf8_to_utf16 (library_path, -1, NULL, NULL, NULL);
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g_assert_nonnull (library_path_u16);
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library = LoadLibraryW (library_path_u16);
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if (!library)
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g_error ("%s (%s) failed with error code %u",
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"FreeLibrary", library_path, (unsigned int) GetLastError ());
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g_free (library_path_u16);
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#endif
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}
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static void
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unload_library (void)
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{
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#ifndef _WIN32
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if (dlclose (library) != 0)
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g_error ("%s failed: %s", "dlclose", dlerror ());
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#else
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if (!FreeLibrary (library))
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g_error ("%s failed with error code %u",
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"FreeLibrary", (unsigned int) GetLastError ());
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#endif
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}
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static void
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test_app (void)
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{
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#if G_HAS_CONSTRUCTORS
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g_assert_cmpstr (g_getenv (APP_PREFIX "ctor"), ==, "1");
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#endif
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#if defined (_WIN32) && defined (G_HAS_TLS_CALLBACKS)
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g_assert_cmpstr (g_getenv (APP_PREFIX "tls_cb_process_attach"), ==, "1");
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#endif
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}
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static void
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test_lib (gconstpointer data)
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{
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const char *library_path = (const char*) data;
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/* Check that the environment is clean */
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#if G_HAS_CONSTRUCTORS
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g_assert_null (g_getenv (LIB_PREFIX "ctor"));
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#endif
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#if G_HAS_DESTRUCTORS
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g_assert_null (g_getenv (LIB_PREFIX "dtor"));
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#endif
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#if defined (_WIN32) && defined (G_HAS_TLS_CALLBACKS)
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g_assert_null (g_getenv (LIB_PREFIX "tls_cb_process_attach"));
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g_assert_null (g_getenv (LIB_PREFIX "tls_cb_process_detach"));
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#endif
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/* Constructors */
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load_library (library_path);
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#if G_HAS_CONSTRUCTORS
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g_assert_cmpstr (g_getenv (LIB_PREFIX "ctor"), ==, "1");
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#endif
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#if defined (_WIN32) && defined (G_HAS_TLS_CALLBACKS)
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g_assert_cmpstr (g_getenv (LIB_PREFIX "tls_cb_process_attach"), ==, "1");
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#endif
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/* Destructors */
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unload_library ();
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#if G_HAS_DESTRUCTORS
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g_assert_cmpstr (g_getenv (LIB_PREFIX "dtor"), ==, "1");
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#endif
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#if defined (_WIN32) && defined (G_HAS_TLS_CALLBACKS)
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g_assert_cmpstr (g_getenv (LIB_PREFIX "tls_cb_process_detach"), ==, "1");
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#endif
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}
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int
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main (int argc, char *argv[])
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{
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const char *libname = G_STRINGIFY (LIB_NAME);
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const char *builddir;
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char *path;
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int ret;
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g_assert_nonnull ((builddir = g_getenv ("G_TEST_BUILDDIR")));
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path = g_build_filename (builddir, libname, NULL);
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g_test_init (&argc, &argv, NULL);
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g_test_add_func ("/constructor/application", test_app);
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g_test_add_data_func ("/constructor/library", path, test_lib);
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ret = g_test_run ();
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g_free (path);
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return ret;
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}
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#endif /* !BUILD_LIBRARY */
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@ -306,6 +306,20 @@ if host_machine.system() == 'windows'
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}
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endif
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if host_machine.system() == 'windows' or have_dlopen_dlsym
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constructor_lib = shared_library('constructor-lib',
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'constructor.c',
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c_args: ['-DBUILD_LIBRARY'],
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dependencies: [libglib_dep],
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install : false)
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glib_tests += {
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'constructor' : {
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'install': false,
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'c_args': ['-DLIB_NAME=' + fs.name(constructor_lib.full_path())]
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}
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}
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endif
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foreach test_name, extra_args : glib_tests
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foreach std: extra_args.get('c_standards', [])
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if c_standards.has_key(std)
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