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glibc/SOURCES/glibc-rh1410154-12.patch

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import glibc-2.28-158.el8
2021-04-23 04:11:25 +00:00
commit 365624e2d2a342cdb693b4cc35d2312169959e28
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Dec 13 10:18:24 2019 +0100
dlopen: Fix issues related to NODELETE handling and relocations
The assumption behind the assert in activate_nodelete was wrong:
Inconsistency detected by ld.so: dl-open.c: 459: activate_nodelete:
Assertion `!imap->l_init_called || imap->l_type != lt_loaded' failed! (edit)
It can happen that an already-loaded object that is in the local
scope is promoted to NODELETE status, via binding to a unique
symbol.
Similarly, it is possible that such NODELETE promotion occurs to
an already-loaded object from the global scope. This is why the
loop in activate_nodelete has to cover all objects in the namespace
of the new object.
In do_lookup_unique, it could happen that the NODELETE status of
an already-loaded object was overwritten with a pending NODELETE
status. As a result, if dlopen fails, this could cause a loss of
the NODELETE status of the affected object, eventually resulting
in an incorrect unload.
Fixes commit f63b73814f74032c0e5d0a83300e3d864ef905e5 ("Remove all
loaded objects if dlopen fails, ignoring NODELETE [BZ #20839]").
diff --git a/elf/Makefile b/elf/Makefile
index 467e810e784bb96d..16a3e8dcda19b4ba 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -185,7 +185,7 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \
tst-audit1 tst-audit2 tst-audit8 tst-audit9 \
tst-addr1 tst-thrlock \
tst-unique1 tst-unique2 $(if $(CXX),tst-unique3 tst-unique4 \
- tst-nodelete) \
+ tst-nodelete tst-dlopen-nodelete-reloc) \
tst-initorder tst-initorder2 tst-relsort1 tst-null-argv \
tst-tlsalign tst-tlsalign-extern tst-nodelete-opened \
tst-nodelete2 tst-audit11 tst-audit12 tst-dlsym-error tst-noload \
@@ -266,7 +266,24 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
tst-auditmod9a tst-auditmod9b \
$(if $(CXX),tst-unique3lib tst-unique3lib2 tst-unique4lib \
tst-nodelete-uniquemod tst-nodelete-rtldmod \
- tst-nodelete-zmod) \
+ tst-nodelete-zmod \
+ tst-dlopen-nodelete-reloc-mod1 \
+ tst-dlopen-nodelete-reloc-mod2 \
+ tst-dlopen-nodelete-reloc-mod3 \
+ tst-dlopen-nodelete-reloc-mod4 \
+ tst-dlopen-nodelete-reloc-mod5 \
+ tst-dlopen-nodelete-reloc-mod6 \
+ tst-dlopen-nodelete-reloc-mod7 \
+ tst-dlopen-nodelete-reloc-mod8 \
+ tst-dlopen-nodelete-reloc-mod9 \
+ tst-dlopen-nodelete-reloc-mod10 \
+ tst-dlopen-nodelete-reloc-mod11 \
+ tst-dlopen-nodelete-reloc-mod12 \
+ tst-dlopen-nodelete-reloc-mod13 \
+ tst-dlopen-nodelete-reloc-mod14 \
+ tst-dlopen-nodelete-reloc-mod15 \
+ tst-dlopen-nodelete-reloc-mod16 \
+ tst-dlopen-nodelete-reloc-mod17) \
tst-initordera1 tst-initorderb1 \
tst-initordera2 tst-initorderb2 \
tst-initordera3 tst-initordera4 \
@@ -1552,3 +1569,48 @@ $(objpfx)tst-dlopenfailmod1.so: \
$(shared-thread-library) $(objpfx)tst-dlopenfaillinkmod.so
LDFLAGS-tst-dlopenfaillinkmod.so = -Wl,-soname,tst-dlopenfail-missingmod.so
$(objpfx)tst-dlopenfailmod2.so: $(shared-thread-library)
+
+$(objpfx)tst-dlopen-nodelete-reloc: $(libdl)
+$(objpfx)tst-dlopen-nodelete-reloc.out: \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod1.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod2.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod3.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod4.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod5.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod6.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod7.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod8.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod9.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod10.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod11.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod12.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod13.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod14.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod15.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod16.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod17.so
+tst-dlopen-nodelete-reloc-mod2.so-no-z-defs = yes
+LDFLAGS-tst-dlopen-nodelete-reloc-mod2.so = -Wl,-z,nodelete
+$(objpfx)tst-dlopen-nodelete-reloc-mod4.so: \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod3.so
+LDFLAGS-tst-dlopen-nodelete-reloc-mod4.so = -Wl,--no-as-needed
+$(objpfx)tst-dlopen-nodelete-reloc-mod5.so: \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod4.so
+LDFLAGS-tst-dlopen-nodelete-reloc-mod5.so = -Wl,-z,nodelete,--no-as-needed
+tst-dlopen-nodelete-reloc-mod5.so-no-z-defs = yes
+tst-dlopen-nodelete-reloc-mod7.so-no-z-defs = yes
+$(objpfx)tst-dlopen-nodelete-reloc-mod8.so: $(libdl)
+$(objpfx)tst-dlopen-nodelete-reloc-mod10.so: $(libdl)
+tst-dlopen-nodelete-reloc-mod11.so-no-z-defs = yes
+$(objpfx)tst-dlopen-nodelete-reloc-mod13.so: \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod12.so
+$(objpfx)tst-dlopen-nodelete-reloc-mod15.so: \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod14.so
+tst-dlopen-nodelete-reloc-mod16.so-no-z-defs = yes
+$(objpfx)tst-dlopen-nodelete-reloc-mod16.so: \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod15.so
+LDFLAGS-tst-dlopen-nodelete-reloc-mod16.so = -Wl,--no-as-needed
+$(objpfx)tst-dlopen-nodelete-reloc-mod17.so: \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod15.so \
+ $(objpfx)tst-dlopen-nodelete-reloc-mod16.so
+LDFLAGS-tst-dlopen-nodelete-reloc-mod17.so = -Wl,--no-as-needed
diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c
index c5e5857fb1fe2808..35a3f96a6296294a 100644
--- a/elf/dl-lookup.c
+++ b/elf/dl-lookup.c
@@ -311,12 +311,12 @@ do_lookup_unique (const char *undef_name, uint_fast32_t new_hash,
enter_unique_sym (entries, size,
new_hash, strtab + sym->st_name, sym, map);
- if (map->l_type == lt_loaded)
+ if (map->l_type == lt_loaded
+ && map->l_nodelete == link_map_nodelete_inactive)
{
/* Make sure we don't unload this object by
setting the appropriate flag. */
- if (__glibc_unlikely (GLRO (dl_debug_mask) & DL_DEBUG_BINDINGS)
- && map->l_nodelete == link_map_nodelete_inactive)
+ if (__glibc_unlikely (GLRO (dl_debug_mask) & DL_DEBUG_BINDINGS))
_dl_debug_printf ("\
marking %s [%lu] as NODELETE due to unique symbol\n",
map->l_name, map->l_ns);
diff --git a/elf/dl-open.c b/elf/dl-open.c
index e13968d4d7c4c83f..c7ed85b7ee99a296 100644
--- a/elf/dl-open.c
+++ b/elf/dl-open.c
@@ -433,34 +433,21 @@ TLS generation counter wrapped! Please report this."));
after dlopen failure is not possible, so that _dl_close can clean
up objects if necessary. */
static void
-activate_nodelete (struct link_map *new, int mode)
+activate_nodelete (struct link_map *new)
{
- if (mode & RTLD_NODELETE || new->l_nodelete == link_map_nodelete_pending)
- {
- if (__glibc_unlikely (GLRO (dl_debug_mask) & DL_DEBUG_FILES))
- _dl_debug_printf ("activating NODELETE for %s [%lu]\n",
- new->l_name, new->l_ns);
- new->l_nodelete = link_map_nodelete_active;
- }
-
- for (unsigned int i = 0; i < new->l_searchlist.r_nlist; ++i)
- {
- struct link_map *imap = new->l_searchlist.r_list[i];
- if (imap->l_nodelete == link_map_nodelete_pending)
- {
- if (__glibc_unlikely (GLRO (dl_debug_mask) & DL_DEBUG_FILES))
- _dl_debug_printf ("activating NODELETE for %s [%lu]\n",
- imap->l_name, imap->l_ns);
-
- /* Only new objects should have set
- link_map_nodelete_pending. Existing objects should not
- have gained any new dependencies and therefore cannot
- reach NODELETE status. */
- assert (!imap->l_init_called || imap->l_type != lt_loaded);
+ /* It is necessary to traverse the entire namespace. References to
+ objects in the global scope and unique symbol bindings can force
+ NODELETE status for objects outside the local scope. */
+ for (struct link_map *l = GL (dl_ns)[new->l_ns]._ns_loaded; l != NULL;
+ l = l->l_next)
+ if (l->l_nodelete == link_map_nodelete_pending)
+ {
+ if (__glibc_unlikely (GLRO (dl_debug_mask) & DL_DEBUG_FILES))
+ _dl_debug_printf ("activating NODELETE for %s [%lu]\n",
+ l->l_name, l->l_ns);
- imap->l_nodelete = link_map_nodelete_active;
- }
- }
+ l->l_nodelete = link_map_nodelete_active;
+ }
}
/* struct dl_init_args and call_dl_init are used to call _dl_init with
@@ -718,7 +705,7 @@ dl_open_worker (void *a)
All memory allocations for new objects must have happened
before. */
- activate_nodelete (new, mode);
+ activate_nodelete (new);
/* Second stage after resize_scopes: Actually perform the scope
update. After this, dlsym and lazy binding can bind to new
diff --git a/elf/tst-dlopen-nodelete-reloc-mod1.c b/elf/tst-dlopen-nodelete-reloc-mod1.c
new file mode 100644
index 0000000000000000..397d60a2d5ea62d9
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod1.c
@@ -0,0 +1,39 @@
+/* Test propagation of NODELETE to an already-loaded object via relocation.
+ Non-NODELETE helper module.
+ Copyright (C) 2019 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/>. */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Globally exported. Set by the main program to true before
+ termination, and used by tst-dlopen-nodelete-reloc-mod2.so to
+ trigger marking this module as NODELETE (and also for its destructor
+ check). */
+bool may_finalize_mod1 = false;
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ if (!may_finalize_mod1)
+ {
+ puts ("error: tst-dlopen-nodelete-reloc-mod1.so destructor"
+ " called too early");
+ _exit (1);
+ }
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod10.c b/elf/tst-dlopen-nodelete-reloc-mod10.c
new file mode 100644
index 0000000000000000..30748b73ec7daed3
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod10.c
@@ -0,0 +1,41 @@
+/* Helper module to load tst-dlopen-nodelete-reloc-mod11.so.
+ Copyright (C) 2019 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/>. */
+
+#include <dlfcn.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <unistd.h>
+
+static void *handle;
+
+static void __attribute__ ((constructor))
+init (void)
+{
+ handle = dlopen ("tst-dlopen-nodelete-reloc-mod11.so", RTLD_NOW);
+ if (handle == NULL)
+ {
+ printf ("error: dlopen in module 10: %s\n", dlerror ());
+ _exit (1);
+ }
+}
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ dlclose (handle);
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod11.cc b/elf/tst-dlopen-nodelete-reloc-mod11.cc
new file mode 100644
index 0000000000000000..48c910403e782c83
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod11.cc
@@ -0,0 +1,49 @@
+/* Second module defining a unique symbol (loaded indirectly).
+ Copyright (C) 2019 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/>. */
+
+#include "tst-dlopen-nodelete-reloc.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Just a flag here, not used for NODELETE processing. */
+bool may_finalize_mod11 = false;
+
+/* Trigger the creation of a unique symbol reference. This should
+ cause tst-dlopen-nodelete-reloc-mod9.so to be marked as
+ NODELETE. */
+
+extern template struct unique_symbol<9>;
+
+int
+global_function_mod11 (void)
+{
+ return unique_symbol<9>::value;
+}
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ if (!may_finalize_mod11)
+ {
+ puts ("error: tst-dlopen-nodelete-reloc-mod11.so destructor"
+ " called too early");
+ _exit (1);
+ }
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod12.cc b/elf/tst-dlopen-nodelete-reloc-mod12.cc
new file mode 100644
index 0000000000000000..5c093fd02d1fd0c7
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod12.cc
@@ -0,0 +1,42 @@
+/* First module for NODELETE test defining a unique symbol (with DT_NEEDED).
+ Copyright (C) 2019 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/>. */
+
+#include "tst-dlopen-nodelete-reloc.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Just a flag here, not used for NODELETE processing. */
+bool may_finalize_mod12 = false;
+
+/* Explicit instantiation. This produces a unique symbol definition
+ which is not referenced by the library itself, so the library is
+ not marked NODELETE. */
+template struct unique_symbol<12>;
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ if (!may_finalize_mod12)
+ {
+ puts ("error: tst-dlopen-nodelete-reloc-mod12.so destructor"
+ " called too early");
+ _exit (1);
+ }
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod13.cc b/elf/tst-dlopen-nodelete-reloc-mod13.cc
new file mode 100644
index 0000000000000000..caf4fd1cc9e1c1e1
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod13.cc
@@ -0,0 +1,48 @@
+/* Second module for NODELETE test defining a unique symbol (with DT_NEEDED).
+ Copyright (C) 2019 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/>. */
+
+#include "tst-dlopen-nodelete-reloc.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Just a flag here, not used for NODELETE processing. */
+bool may_finalize_mod13 = false;
+
+extern template struct unique_symbol<12>;
+
+/* Trigger the creation of a unique symbol reference. This should
+ cause tst-dlopen-nodelete-reloc-mod12.so to be marked as
+ NODELETE. */
+int
+global_function_mod13 (void)
+{
+ return unique_symbol<12>::value;
+}
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ if (!may_finalize_mod13)
+ {
+ puts ("error: tst-dlopen-nodelete-reloc-mod13.so destructor"
+ " called too early");
+ _exit (1);
+ }
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod13.h b/elf/tst-dlopen-nodelete-reloc-mod13.h
new file mode 100644
index 0000000000000000..5d338481a34a5714
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod13.h
@@ -0,0 +1,24 @@
+/* Inline function which produces a unique symbol.
+ Copyright (C) 2019 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/>. */
+
+inline char *
+third_function_with_local_static (void)
+{
+ static char local;
+ return &local;
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod14.cc b/elf/tst-dlopen-nodelete-reloc-mod14.cc
new file mode 100644
index 0000000000000000..e67621a2a2f8509a
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod14.cc
@@ -0,0 +1,42 @@
+/* This object must retain NODELETE status after a dlopen failure.
+ Copyright (C) 2019 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/>. */
+
+#include "tst-dlopen-nodelete-reloc.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Just a flag here, not used for NODELETE processing. */
+bool may_finalize_mod14 = false;
+
+/* Explicit instantiation. This produces a unique symbol definition
+ which is not referenced by the library itself, so the library is
+ not marked NODELETE. */
+template struct unique_symbol<14>;
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ if (!may_finalize_mod14)
+ {
+ puts ("error: tst-dlopen-nodelete-reloc-mod14.so destructor"
+ " called too early");
+ _exit (1);
+ }
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod15.cc b/elf/tst-dlopen-nodelete-reloc-mod15.cc
new file mode 100644
index 0000000000000000..ead362bfdbb90eef
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod15.cc
@@ -0,0 +1,42 @@
+/* Helper object to mark tst-dlopen-nodelete-reloc-mod14.so as NODELETE.
+ Copyright (C) 2019 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/>. */
+
+#include "tst-dlopen-nodelete-reloc.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+extern template struct unique_symbol<14>;
+
+/* Trigger the creation of a unique symbol reference. This should
+ cause tst-dlopen-nodelete-reloc-mod14.so to be marked as
+ NODELETE. */
+int
+global_function_mod15 (void)
+{
+ return unique_symbol<14>::value;
+}
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ /* This object is never loaded completely. */
+ puts ("error: tst-dlopen-nodelete-reloc-mod15.so destructor invoked");
+ _exit (1);
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod16.c b/elf/tst-dlopen-nodelete-reloc-mod16.c
new file mode 100644
index 0000000000000000..fa2ed1461b42c82c
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod16.c
@@ -0,0 +1,27 @@
+/* Object with an undefined symbol to trigger a relocation failure.
+ Copyright (C) 2019 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/>. */
+
+/* The reference to undefined_mod16 triggers a relocation failure. */
+
+extern int undefined_mod16;
+
+int
+global_function_mod16 (void)
+{
+ return undefined_mod16;
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod17.c b/elf/tst-dlopen-nodelete-reloc-mod17.c
new file mode 100644
index 0000000000000000..426562edd9a3ffee
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod17.c
@@ -0,0 +1,19 @@
+/* Top-level object with dependency on an object that fails relocation.
+ Copyright (C) 2019 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/>. */
+
+/* The dependencies do all the work. */
diff --git a/elf/tst-dlopen-nodelete-reloc-mod2.c b/elf/tst-dlopen-nodelete-reloc-mod2.c
new file mode 100644
index 0000000000000000..81ea8e5af2d00b93
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod2.c
@@ -0,0 +1,38 @@
+/* Test propagation of NODELETE to an already-loaded object via relocation.
+ NODELETE helper module.
+ Copyright (C) 2019 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/>. */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Defined in tst-dlopen-nodelete-reloc-mod1.so. This dependency is
+ not expressed via DT_NEEDED, so this reference marks the other
+ object as NODELETE dynamically, during initially relocation. */
+extern bool may_finalize_mod1;
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ if (!may_finalize_mod1)
+ {
+ puts ("error: tst-dlopen-nodelete-reloc-mod2.so destructor"
+ " called too early");
+ _exit (1);
+ }
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod3.c b/elf/tst-dlopen-nodelete-reloc-mod3.c
new file mode 100644
index 0000000000000000..d33f4ec7630c6a1e
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod3.c
@@ -0,0 +1,38 @@
+/* Test propagation of NODELETE to an already-loaded object via relocation.
+ Non-NODELETE helper module.
+ Copyright (C) 2019 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/>. */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Globally exported. Set by the main program to true before
+ termination, and used by tst-dlopen-nodelete-reloc-mod4.so,
+ tst-dlopen-nodelete-reloc-mod5.so. */
+bool may_finalize_mod3 = false;
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ if (!may_finalize_mod3)
+ {
+ puts ("error: tst-dlopen-nodelete-reloc-mod3.so destructor"
+ " called too early");
+ _exit (1);
+ }
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod4.c b/elf/tst-dlopen-nodelete-reloc-mod4.c
new file mode 100644
index 0000000000000000..7e6633aebb1e2f00
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod4.c
@@ -0,0 +1,37 @@
+/* Test propagation of NODELETE to an already-loaded object via relocation.
+ Intermediate helper module.
+ Copyright (C) 2019 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/>. */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Defined in tst-dlopen-nodelete-reloc-mod3.so. The dependency is
+ expressed via DT_NEEDED. */
+extern bool may_finalize_mod3;
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ if (!may_finalize_mod3)
+ {
+ puts ("error: tst-dlopen-nodelete-reloc-mod4.so destructor"
+ " called too early");
+ _exit (1);
+ }
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod5.c b/elf/tst-dlopen-nodelete-reloc-mod5.c
new file mode 100644
index 0000000000000000..22aa16f855dc75a8
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod5.c
@@ -0,0 +1,38 @@
+/* Test propagation of NODELETE to an already-loaded object via relocation.
+ NODELETE helper module.
+ Copyright (C) 2019 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/>. */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Defined in tst-dlopen-nodelete-reloc-mod3.so. The dependency is
+ expressed via DT_NEEDED on the intermediate DSO
+ tst-dlopen-nodelete-reloc-mod3.so. */
+extern bool may_finalize_mod3;
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ if (!may_finalize_mod3)
+ {
+ puts ("error: tst-dlopen-nodelete-reloc-mod5.so destructor"
+ " called too early");
+ _exit (1);
+ }
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod6.cc b/elf/tst-dlopen-nodelete-reloc-mod6.cc
new file mode 100644
index 0000000000000000..180f5b5842f1c2b0
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod6.cc
@@ -0,0 +1,42 @@
+/* First module for NODELETE test defining a unique symbol.
+ Copyright (C) 2019 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/>. */
+
+#include "tst-dlopen-nodelete-reloc.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Just a flag here, not used for NODELETE processing. */
+bool may_finalize_mod6 = false;
+
+/* Explicit instantiation. This produces a unique symbol definition
+ which is not referenced by the library itself, so the library is
+ not marked NODELETE. */
+template struct unique_symbol<6>;
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ if (!may_finalize_mod6)
+ {
+ puts ("error: tst-dlopen-nodelete-reloc-mod6.so destructor"
+ " called too early");
+ _exit (1);
+ }
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod7.cc b/elf/tst-dlopen-nodelete-reloc-mod7.cc
new file mode 100644
index 0000000000000000..c85e7c991b098bf5
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod7.cc
@@ -0,0 +1,48 @@
+/* Second module for NODELETE test defining a unique symbol.
+ Copyright (C) 2019 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/>. */
+
+#include "tst-dlopen-nodelete-reloc.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Just a flag here, not used for NODELETE processing. */
+bool may_finalize_mod7 = false;
+
+extern template struct unique_symbol<6>;
+
+/* Trigger the creation of a unique symbol reference. This should
+ cause tst-dlopen-nodelete-reloc-mod6.so to be marked as
+ NODELETE. */
+int
+global_function_mod7 (void)
+{
+ return unique_symbol<6>::value;
+}
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ if (!may_finalize_mod7)
+ {
+ puts ("error: tst-dlopen-nodelete-reloc-mod7.so destructor"
+ " called too early");
+ _exit (1);
+ }
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod8.c b/elf/tst-dlopen-nodelete-reloc-mod8.c
new file mode 100644
index 0000000000000000..ebb1c35fab57e319
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod8.c
@@ -0,0 +1,41 @@
+/* Helper module to load tst-dlopen-nodelete-reloc-mod9.so.
+ Copyright (C) 2019 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/>. */
+
+#include <dlfcn.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <unistd.h>
+
+static void *handle;
+
+static void __attribute__ ((constructor))
+init (void)
+{
+ handle = dlopen ("tst-dlopen-nodelete-reloc-mod9.so", RTLD_NOW);
+ if (handle == NULL)
+ {
+ printf ("error: dlopen in module 8: %s\n", dlerror ());
+ _exit (1);
+ }
+}
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ dlclose (handle);
+}
diff --git a/elf/tst-dlopen-nodelete-reloc-mod9.cc b/elf/tst-dlopen-nodelete-reloc-mod9.cc
new file mode 100644
index 0000000000000000..06fb49cdf753cb41
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc-mod9.cc
@@ -0,0 +1,42 @@
+/* First module defining a unique symbol (loaded indirectly).
+ Copyright (C) 2019 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/>. */
+
+#include "tst-dlopen-nodelete-reloc.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Just a flag here, not used for NODELETE processing. */
+bool may_finalize_mod9 = false;
+
+/* Explicit instantiation. This produces a unique symbol definition
+ which is not referenced by the library itself, so the library is
+ not marked NODELETE. */
+template struct unique_symbol<9>;
+
+static void __attribute__ ((destructor))
+fini (void)
+{
+ if (!may_finalize_mod9)
+ {
+ puts ("error: tst-dlopen-nodelete-reloc-mod9.so destructor"
+ " called too early");
+ _exit (1);
+ }
+}
diff --git a/elf/tst-dlopen-nodelete-reloc.c b/elf/tst-dlopen-nodelete-reloc.c
new file mode 100644
index 0000000000000000..291ac9eb8385a92e
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc.c
@@ -0,0 +1,179 @@
+/* Test interactions of dlopen, NODELETE, and relocations.
+ Copyright (C) 2019 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/>. */
+
+/* This test exercises NODELETE propagation due to data relocations
+ and unique symbols, and the interaction with already-loaded
+ objects. Some test objects are written in C++, to produce unique
+ symbol definitions.
+
+ First test: Global scope variant, data relocation as the NODELETE
+ trigger. mod1 is loaded first with a separate dlopen call.
+
+ mod2 ---(may_finalize_mod1 relocation dependency)---> mod1
+ (NODELETE) (marked as NODELETE)
+
+ Second test: Local scope variant, data relocation. mod3 is loaded
+ first, then mod5.
+
+ mod5 ---(DT_NEEDED)---> mod4 ---(DT_NEEDED)---> mod3
+ (NODELETE) (not NODELETE) ^
+ \ / (marked as
+ `--(may_finalize_mod3 relocation dependency)--/ NODELETE)
+
+ Third test: Shared local scope with unique symbol. mod6 is loaded
+ first, then mod7. No explicit dependencies between the two
+ objects, so first object has to be opened with RTLD_GLOBAL.
+
+ mod7 ---(unique symbol)---> mod6
+ (marked as NODELETE)
+
+ Forth test: Non-shared scopes with unique symbol. mod8 and mod10
+ are loaded from the main program. mod8 loads mod9 from an ELF
+ constructor, mod10 loads mod11. There are no DT_NEEDED
+ dependencies. mod9 is promoted to the global scope form the main
+ program. The unique symbol dependency is:
+
+ mod9 ---(unique symbol)---> mod11
+ (marked as NODELETE)
+
+ Fifth test: Shared local scope with unique symbol, like test 3, but
+ this time, there is also a DT_NEEDED dependency (so no RTLD_GLOBAL
+ needed):
+
+ DT_NEEDED
+ mod13 ---(unique symbol)---> mod12
+ (marked as NODELETE)
+
+ Sixth test: NODELETE status is retained after relocation failure
+ with unique symbol dependency. The object graph ensures that the
+ unique symbol binding is processed before the dlopen failure.
+
+ DT_NEEDED
+ mod17 --(DT_NEEDED)--> mod15 --(unique symbol)--> mod14
+ \ ^ (RTLD_NODELETE)
+ \ (DT_NEEDED)
+ \ |
+ `---(DT_NEEDED)--> mod16
+ (fails to relocate)
+
+ mod14 is loaded first, and the loading mod17 is attempted.
+ mod14 must remain NODELETE after opening mod17 failed. */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+#include <support/check.h>
+#include <support/xdlfcn.h>
+
+static int
+do_test (void)
+{
+ /* First case: global scope, regular data symbol. Open the object
+ which is not NODELETE initially. */
+ void *mod1 = xdlopen ("tst-dlopen-nodelete-reloc-mod1.so",
+ RTLD_NOW | RTLD_GLOBAL);
+ /* This is used to indicate that the ELF destructor may be
+ called. */
+ bool *may_finalize_mod1 = xdlsym (mod1, "may_finalize_mod1");
+ /* Open the NODELETE object. */
+ void *mod2 = xdlopen ("tst-dlopen-nodelete-reloc-mod2.so", RTLD_NOW);
+ /* This has no effect because the DSO is directly marked as
+ NODELETE. */
+ xdlclose (mod2);
+ /* This has no effect because the DSO has been indirectly marked as
+ NODELETE due to a relocation dependency. */
+ xdlclose (mod1);
+
+ /* Second case: local scope, regular data symbol. Open the object
+ which is not NODELETE initially. */
+ void *mod3 = xdlopen ("tst-dlopen-nodelete-reloc-mod3.so", RTLD_NOW);
+ bool *may_finalize_mod3 = xdlsym (mod3, "may_finalize_mod3");
+ /* Open the NODELETE object. */
+ void *mod5 = xdlopen ("tst-dlopen-nodelete-reloc-mod5.so", RTLD_NOW);
+ /* Again those have no effect because of NODELETE. */
+ xdlclose (mod5);
+ xdlclose (mod3);
+
+ /* Third case: Unique symbol. */
+ void *mod6 = xdlopen ("tst-dlopen-nodelete-reloc-mod6.so",
+ RTLD_NOW | RTLD_GLOBAL);
+ bool *may_finalize_mod6 = xdlsym (mod6, "may_finalize_mod6");
+ void *mod7 = xdlopen ("tst-dlopen-nodelete-reloc-mod7.so", RTLD_NOW);
+ bool *may_finalize_mod7 = xdlsym (mod7, "may_finalize_mod7");
+ /* This should not have any effect because of the unique symbol and
+ the resulting NODELETE status. */
+ xdlclose (mod6);
+ /* mod7 is not NODELETE and can be closed. */
+ *may_finalize_mod7 = true;
+ xdlclose (mod7);
+
+ /* Fourth case: Unique symbol, indirect loading. */
+ void *mod8 = xdlopen ("tst-dlopen-nodelete-reloc-mod8.so", RTLD_NOW);
+ /* Also promote to global scope. */
+ void *mod9 = xdlopen ("tst-dlopen-nodelete-reloc-mod9.so",
+ RTLD_NOW | RTLD_NOLOAD | RTLD_GLOBAL);
+ bool *may_finalize_mod9 = xdlsym (mod9, "may_finalize_mod9");
+ xdlclose (mod9); /* Drop mod9 reference. */
+ void *mod10 = xdlopen ("tst-dlopen-nodelete-reloc-mod10.so", RTLD_NOW);
+ void *mod11 = xdlopen ("tst-dlopen-nodelete-reloc-mod11.so",
+ RTLD_NOW | RTLD_NOLOAD);
+ bool *may_finalize_mod11 = xdlsym (mod11, "may_finalize_mod11");
+ xdlclose (mod11); /* Drop mod11 reference. */
+ /* mod11 is not NODELETE and can be closed. */
+ *may_finalize_mod11 = true;
+ /* Trigger closing of mod11, too. */
+ xdlclose (mod10);
+ /* Does not trigger closing of mod9. */
+ xdlclose (mod8);
+
+ /* Fifth case: Unique symbol, with DT_NEEDED dependency. */
+ void *mod12 = xdlopen ("tst-dlopen-nodelete-reloc-mod12.so", RTLD_NOW);
+ bool *may_finalize_mod12 = xdlsym (mod12, "may_finalize_mod12");
+ void *mod13 = xdlopen ("tst-dlopen-nodelete-reloc-mod13.so", RTLD_NOW);
+ bool *may_finalize_mod13 = xdlsym (mod13, "may_finalize_mod13");
+ /* This should not have any effect because of the unique symbol. */
+ xdlclose (mod12);
+ /* mod13 is not NODELETE and can be closed. */
+ *may_finalize_mod13 = true;
+ xdlclose (mod13);
+
+ /* Sixth case: Unique symbol binding must not cause loss of NODELETE
+ status. */
+ void *mod14 = xdlopen ("tst-dlopen-nodelete-reloc-mod14.so",
+ RTLD_NOW | RTLD_NODELETE);
+ bool *may_finalize_mod14 = xdlsym (mod14, "may_finalize_mod14");
+ TEST_VERIFY (dlopen ("tst-dlopen-nodelete-reloc-mod17.so", RTLD_NOW)
+ == NULL);
+ const char *message = dlerror ();
+ printf ("info: test 6 message: %s\n", message);
+ /* This must not close the object, it must still be NODELETE. */
+ xdlclose (mod14);
+ xdlopen ("tst-dlopen-nodelete-reloc-mod14.so", RTLD_NOW | RTLD_NOLOAD);
+
+ /* Prepare for process exit. Destructors for NODELETE objects will
+ be invoked. */
+ *may_finalize_mod1 = true;
+ *may_finalize_mod3 = true;
+ *may_finalize_mod6 = true;
+ *may_finalize_mod9 = true;
+ *may_finalize_mod12 = true;
+ *may_finalize_mod14 = true;
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/elf/tst-dlopen-nodelete-reloc.h b/elf/tst-dlopen-nodelete-reloc.h
new file mode 100644
index 0000000000000000..8844de622631f575
--- /dev/null
+++ b/elf/tst-dlopen-nodelete-reloc.h
@@ -0,0 +1,35 @@
+/* Template to produce unique symbols.
+ Copyright (C) 2019 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/>. */
+
+/* This template produces a unique symbol definition for an explicit
+ template instantiation (without also incorporating a reference),
+ and an extern template declaration can be used to reference that
+ symbol from another object. The modid parameter is just a
+ placeholder to create different symbols (because it affects the
+ name mangling of the static value member). By convention, it
+ should match the number of the module that contains the
+ definition. */
+
+template <int modid>
+struct unique_symbol
+{
+ static int value;
+};
+
+template <int modid>
+int unique_symbol<modid>::value;
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