diff options
Diffstat (limited to 'elf/tst-single_threaded-static-dlopen.c')
-rw-r--r-- | elf/tst-single_threaded-static-dlopen.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/elf/tst-single_threaded-static-dlopen.c b/elf/tst-single_threaded-static-dlopen.c new file mode 100644 index 0000000..f335883 --- /dev/null +++ b/elf/tst-single_threaded-static-dlopen.c @@ -0,0 +1,57 @@ +/* Test support for single-thread optimizations. No threads, static dlopen. + Copyright (C) 2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +/* In a static dlopen scenario, the single-threaded optimization is + not possible because their is no globally shared dynamic linker + across all namespaces. */ + +#include <stddef.h> +#include <support/check.h> +#include <support/xdlfcn.h> +#include <sys/single_threaded.h> + +static int +do_test (void) +{ + TEST_VERIFY (__libc_single_threaded); + + /* Defined in tst-single-threaded-mod1.o. */ + extern _Bool single_threaded_1 (void); + TEST_VERIFY (single_threaded_1 ()); + + /* A failed dlopen does not change the multi-threaded status. */ + TEST_VERIFY (dlopen ("tst-single_threaded-does-not-exist.so", RTLD_LAZY) + == NULL); + TEST_VERIFY (__libc_single_threaded); + TEST_VERIFY (single_threaded_1 ()); + + /* And neither does a successful dlopen for outer (static) libc. */ + void *handle_mod2 = xdlopen ("tst-single_threaded-mod2.so", RTLD_LAZY); + _Bool (*single_threaded_2) (void) + = xdlsym (handle_mod2, "single_threaded_2"); + TEST_VERIFY (__libc_single_threaded); + TEST_VERIFY (single_threaded_1 ()); + /* The inner libc always assumes multi-threaded use. */ + TEST_VERIFY (!single_threaded_2 ()); + + xdlclose (handle_mod2); + + return 0; +} + +#include <support/test-driver.c> |