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WIP dlopen NODELETE test

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This commit is contained in:
Florian Weimer 2019-12-03 09:26:03 +01:00
parent 4db71d2f98
commit 5a8f6dfc41
17 changed files with 789 additions and 2 deletions
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42
elf/Makefile
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@ -191,7 +191,7 @@ 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 \
@ -271,7 +271,20 @@ 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-initordera1 tst-initorderb1 \
tst-initordera2 tst-initorderb2 \
tst-initordera3 tst-initordera4 \
@ -1627,3 +1640,28 @@ $(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
tst-dlopen-nodelete-reloc-mod2.so-no-z-defs = yes
LDFLAGS-tst-dlopen-nodelete-reloc-mod2.so = -Wl,-z,nodelete
LDFLAGS-tst-dlopen-nodelete-reloc-mod5.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,--no-as-needed
tst-dlopen-nodelete-reloc-mod5.so-no-z-defs = yes
$(objpfx)tst-dlopen-nodelete-reloc-mod8.so: $(libdl)
$(objpfx)tst-dlopen-nodelete-reloc-mod10.so: $(libdl)
$(objpfx)tst-dlopen-nodelete-reloc-mod13.so: \
$(objpfx)tst-dlopen-nodelete-reloc-mod12.so
# Prevent self-reference from marking the object as NODELETE.
LDFLAGS-tst-dlopen-nodelete-reloc-mod12.so = -Wl,-Bsymbolic
LDFLAGS-tst-dlopen-nodelete-reloc-mod13.so = -Wl,--no-as-needed

39
elf/tst-dlopen-nodelete-reloc-mod1.c Normal file
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@ -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 his 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);
}
}

41
elf/tst-dlopen-nodelete-reloc-mod10.c Normal file
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@ -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);
}

45
elf/tst-dlopen-nodelete-reloc-mod11.cc Normal file
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@ -0,0 +1,45 @@
/* 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. This should cause
tst-dlopen-nodelete-reloc-mod9.so to be marked as NODELETE. */
char *
global_function_mod11 (void)
{
return function_with_local_static_2 ();
}
static void __attribute__ ((destructor))
fini (void)
{
if (!may_finalize_mod11)
{
puts ("error: tst-dlopen-nodelete-reloc-mod11.so destructor"
" called too early");
_exit (1);
}
}

44
elf/tst-dlopen-nodelete-reloc-mod12.cc Normal file
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@ -0,0 +1,44 @@
/* 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;
/* Trigger the creation of a unique symbol. */
char *
global_function_mod12 (void)
{
return function_with_local_static_3 ();
}
static void __attribute__ ((destructor))
fini (void)
{
if (!may_finalize_mod12)
{
puts ("error: tst-dlopen-nodelete-reloc-mod12.so destructor"
" called too early");
_exit (1);
}
}

45
elf/tst-dlopen-nodelete-reloc-mod13.cc Normal file
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@ -0,0 +1,45 @@
/* 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;
/* Trigger the creation of a unique symbol. This should cause
tst-dlopen-nodelete-reloc-mod12.so to be marked as NODELETE. */
char *
global_function_mod13 (void)
{
return function_with_local_static_3 ();
}
static void __attribute__ ((destructor))
fini (void)
{
if (!may_finalize_mod13)
{
puts ("error: tst-dlopen-nodelete-reloc-mod13.so destructor"
" called too early");
_exit (1);
}
}

24
elf/tst-dlopen-nodelete-reloc-mod13.h Normal file
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@ -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;
}

38
elf/tst-dlopen-nodelete-reloc-mod2.c Normal file
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@ -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);
}
}

38
elf/tst-dlopen-nodelete-reloc-mod3.c Normal file
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@ -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);
}
}

37
elf/tst-dlopen-nodelete-reloc-mod4.c Normal file
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@ -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);
}
}

38
elf/tst-dlopen-nodelete-reloc-mod5.c Normal file
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@ -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 intermedia 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);
}
}

44
elf/tst-dlopen-nodelete-reloc-mod6.cc Normal file
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@ -0,0 +1,44 @@
/* 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;
/* Trigger the creation of a unique symbol. */
char *
global_function_mod6 (void)
{
return function_with_local_static_1 ();
}
static void __attribute__ ((destructor))
fini (void)
{
if (!may_finalize_mod6)
{
puts ("error: tst-dlopen-nodelete-reloc-mod6.so destructor"
" called too early");
_exit (1);
}
}

45
elf/tst-dlopen-nodelete-reloc-mod7.cc Normal file
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@ -0,0 +1,45 @@
/* 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;
/* Trigger the creation of a unique symbol. This should cause
tst-dlopen-nodelete-reloc-mod6.so to be marked as NODELETE. */
char *
global_function_mod7 (void)
{
return function_with_local_static_2 ();
}
static void __attribute__ ((destructor))
fini (void)
{
if (!may_finalize_mod7)
{
puts ("error: tst-dlopen-nodelete-reloc-mod7.so destructor"
" called too early");
_exit (1);
}
}

41
elf/tst-dlopen-nodelete-reloc-mod8.c Normal file
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@ -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);
}

44
elf/tst-dlopen-nodelete-reloc-mod9.cc Normal file
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@ -0,0 +1,44 @@
/* 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;
/* Trigger the creation of a unique symbol. */
char *
global_function_mod9 (void)
{
return function_with_local_static_2 ();
}
static void __attribute__ ((destructor))
fini (void)
{
if (!may_finalize_mod9)
{
puts ("error: tst-dlopen-nodelete-reloc-mod9.so destructor"
" called too early");
_exit (1);
}
}

148
elf/tst-dlopen-nodelete-reloc.c Normal file
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@ -0,0 +1,148 @@
/* Test propagation of NODELETE to an already-loaded object via 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/>. */
/* This test exercises NODELETE propagation due to data relocations
and unique symbols.
First test: Global scope variant, data relocation as the NODELETE
trigger. mod1 is loaded first.
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.
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. 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:
DT_NEEDED
mod13 ---(unique symbol)---> mod12
(marked as NODELETE)
*/
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <support/check.h>
#include <support/xdlfcn.h>
static int
do_test (void)
{
#if 0
/* 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);
#endif
/* 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);
(void) mod5;
xdlclose (mod3);
/* Third case: Unique symbol. */
void *mod6 = xdlopen ("tst-dlopen-nodelete-reloc-mod6.so", RTLD_NOW);
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. */
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);
void *mod9 = xdlopen ("tst-dlopen-nodelete-reloc-mod9.so",
RTLD_NOW | RTLD_NOLOAD);
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. */
/* This should not have any effect because of the unique symbol. */
xdlclose (mod6);
/* 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. */
*may_finalize_mod9 = true;
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);
/* Prepare for the process exit. */
// *may_finalize_mod1 = true;
*may_finalize_mod3 = true;
*may_finalize_mod6 = true;
//*may_finalize_mod9 = true;
*may_finalize_mod12 = true;
return 0;
}
#include <support/test-driver.c>

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/* Inline functions which 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/>. */
inline char *
function_with_local_static_1 (void)
{
static char local;
return &local;
}
inline char *
function_with_local_static_2 (void)
{
static char local;
return &local;
}
inline char *
function_with_local_static_3 (void)
{
static char local;
return &local;
}