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elf: Use custom NODELETE DSO for tst-dlopenfail, tst-dlopenfail-2
Once libpthread is empty and no longer marked NODELETE, it no longer can be used for testing. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
parent
b8cdc3bba7
commit
7862ff8e69
11
elf/Makefile
11
elf/Makefile
@ -334,7 +334,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
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tst-auditmanymod7 tst-auditmanymod8 tst-auditmanymod9 \
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tst-initlazyfailmod tst-finilazyfailmod \
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tst-dlopenfailmod1 tst-dlopenfaillinkmod tst-dlopenfailmod2 \
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tst-dlopenfailmod3 tst-ldconfig-ld-mod \
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tst-dlopenfailmod3 tst-dlopenfailnodelmod tst-ldconfig-ld-mod \
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tst-filterobj-flt tst-filterobj-aux tst-filterobj-filtee \
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tst-auditlogmod-1 tst-auditlogmod-2 tst-auditlogmod-3 \
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tst-single_threaded-mod1 tst-single_threaded-mod2 \
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@ -1733,11 +1733,18 @@ LDFLAGS-tst-dlopenfailmod1.so = -Wl,--no-as-needed
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$(objpfx)tst-dlopenfailmod1.so: \
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$(shared-thread-library) $(objpfx)tst-dlopenfaillinkmod.so
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LDFLAGS-tst-dlopenfaillinkmod.so = -Wl,-soname,tst-dlopenfail-missingmod.so
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$(objpfx)tst-dlopenfailmod2.so: $(shared-thread-library)
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$(objpfx)tst-dlopenfailmod2.so: $(objpfx)tst-dlopenfailnodelmod.so
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$(objpfx)tst-dlopenfail-2: $(libdl)
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$(objpfx)tst-dlopenfail-2.out: \
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$(objpfx)tst-dlopenfailmod1.so $(objpfx)tst-dlopenfailmod2.so \
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$(objpfx)tst-dlopenfailmod3.so
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# tst-dlopenfailnodelmod.so emulates how libpthread was linked.
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$(objpfx)tst-dlopenfailnodelmod.so: $(libsupport)
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LDFLAGS-tst-dlopenfailnodelmod.so = \
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-Wl,--enable-new-dtags,-z,nodelete,-z,initfirst
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# tst-dlopenfail should export the libsupport symbols, so that
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# tst-dlopenfailnodelmod.so uses them for error reporting.
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LDFLAGS-tst-dlopenfail = -Wl,-E
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$(objpfx)tst-dlopen-nodelete-reloc: $(libdl)
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$(objpfx)tst-dlopen-nodelete-reloc.out: \
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@ -28,10 +28,7 @@
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static int
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do_test (void)
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{
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/* This test uses libpthread as the canonical NODELETE module. If
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libpthread is no longer NODELETE because it has been merged into
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libc, the test needs to be updated. */
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TEST_VERIFY (dlsym (NULL, "pthread_create") == NULL);
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TEST_VERIFY (dlsym (NULL, "no_delete_mod_function") == NULL);
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/* This is expected to fail because of the missing dependency. */
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puts ("info: attempting to load tst-dlopenfailmod1.so");
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@ -18,7 +18,6 @@
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#include <dlfcn.h>
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#include <errno.h>
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#include <gnu/lib-names.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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@ -28,10 +27,7 @@
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static int
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do_test (void)
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{
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/* This test uses libpthread as the canonical NODELETE module. If
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libpthread is no longer NODELETE because it has been merged into
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libc, the test needs to be updated. */
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TEST_VERIFY (dlsym (NULL, "pthread_create") == NULL);
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TEST_VERIFY (dlsym (NULL, "no_delete_mod_function") == NULL);
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/* This is expected to fail because of the missing dependency. */
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puts ("info: attempting to load tst-dlopenfailmod1.so");
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@ -42,36 +38,32 @@ do_test (void)
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" cannot open shared object file:"
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" No such file or directory");
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/* Do not probe for the presence of libpthread at this point because
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that might trigger relocation if bug 20839 is present, obscuring
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a subsequent crash. */
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/* Do not probe for the presence of the tst-dlopenfailnodelmod.so at
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this point because that might trigger relocation if bug 20839 is
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present, obscuring a subsequent crash. */
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/* This is expected to succeed. */
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puts ("info: loading tst-dlopenfailmod2.so");
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void *handle = xdlopen ("tst-dlopenfailmod2.so", RTLD_NOW);
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xdlclose (handle);
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/* libpthread should remain loaded. */
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TEST_VERIFY (dlopen (LIBPTHREAD_SO, RTLD_LAZY | RTLD_NOLOAD) != NULL);
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TEST_VERIFY (dlsym (NULL, "pthread_create") == NULL);
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/* The NODELETE module should remain loaded. */
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TEST_VERIFY (dlopen ("tst-dlopenfailnodelmod.so", RTLD_LAZY | RTLD_NOLOAD)
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!= NULL);
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/* But the symbol is not in the global scope. */
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TEST_VERIFY (dlsym (NULL, "no_delete_mod_function") == NULL);
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/* We can make libpthread global, and then the symbol should become
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available. */
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TEST_VERIFY (dlopen (LIBPTHREAD_SO, RTLD_LAZY | RTLD_GLOBAL) != NULL);
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TEST_VERIFY (dlsym (NULL, "pthread_create") != NULL);
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/* We can make tst-dlopenfailnodelmod.so global, and then the symbol
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should become available. */
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TEST_VERIFY (dlopen ("tst-dlopenfailnodelmod.so", RTLD_LAZY | RTLD_GLOBAL)
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!= NULL);
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void (*no_delete_mod_function) (void)
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= dlsym (NULL, "no_delete_mod_function");
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TEST_VERIFY_EXIT (no_delete_mod_function != NULL);
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/* sem_open is sufficiently complex to depend on relocations. */
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void *(*sem_open_ptr) (const char *, int flag, ...)
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= dlsym (NULL, "sem_open");
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if (sem_open_ptr == NULL)
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/* Hurd does not implement sem_open. */
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puts ("warning: sem_open not found, further testing not possible");
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else
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{
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errno = 0;
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TEST_VERIFY (sem_open_ptr ("/", 0) == NULL);
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TEST_COMPARE (errno, EINVAL);
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}
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/* Hopefully, no_delete_mod_function is sufficiently complex to
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depend on relocations. */
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no_delete_mod_function ();
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return 0;
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}
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@ -16,11 +16,11 @@
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <stdio.h>
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/* Force linking against libpthread. */
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void *pthread_create_reference = pthread_create;
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/* Force linking against tst-dlopenfailnodelmod.so. */
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void no_delete_mod_function (void);
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void *function_reference = no_delete_mod_function;
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static void __attribute__ ((constructor))
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init (void)
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29
elf/tst-dlopenfailnodelmod.c
Normal file
29
elf/tst-dlopenfailnodelmod.c
Normal file
@ -0,0 +1,29 @@
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/* NODELETE module for tst-dlopenfail, tst-dlopenfail-2.
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Copyright (C) 2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C 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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The GNU C 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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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <support/check.h>
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/* Introduce some relocation dependencies. */
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const char test_string[] = "test string";
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const char *test_string_ptr = test_string;
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void
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no_delete_mod_function (void)
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{
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TEST_COMPARE_STRING (test_string, test_string_ptr);
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}
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