elf/tst-tls-manydynamic: New test
This test adds coverage for creating many dynamic TLS variables which exhaust the static TLS allocation.
This commit is contained in:
Florian Weimer
parent
67aae64512
commit
01b23a30b4
14
ChangeLog
14
ChangeLog
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@ -1,3 +1,17 @@
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2016-12-02 Florian Weimer <fweimer@redhat.com>
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* elf/Makefile [build-shared] (tests): Add tst-latepthread.
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(one-hundred, tst-tls-many-dynamic-modules): Define.
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(modules-names): Add $(tst-tls-many-dynamic-modules).
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(tst-tls-manydynamic%mod.os): Build with special preprocessor
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macros.
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(tst-tls-manydynamic): Link against libdl, libpthread.
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(tst-tls-manydynamic.out): The test needs the test modules at run
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time.
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* elf/tst-tls-manydynamic.c: New file.
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* elf/tst-tls-manydynamic.h: Likewise.
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* elf/tst-tls-manydynamicmod.c: Likewise.
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2016-12-02 Florian Weimer <fweimer@redhat.com>
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* sysdeps/aarch64/tlsdesc.sym (TCBHEAD_DTV, DTV_COUNTER)
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17
elf/Makefile
17
elf/Makefile
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@ -152,7 +152,7 @@ tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
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tst-initorder tst-initorder2 tst-relsort1 tst-null-argv \
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tst-ptrguard1 tst-tlsalign tst-tlsalign-extern tst-nodelete-opened \
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tst-nodelete2 tst-audit11 tst-audit12 tst-dlsym-error tst-noload \
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tst-latepthread
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tst-latepthread tst-tls-manydynamic
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# reldep9
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ifeq ($(build-hardcoded-path-in-tests),yes)
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tests += tst-dlopen-aout
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@ -173,6 +173,10 @@ tlsmod17a-suffixes = 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
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tlsmod18a-suffixes = 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
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tlsmod17a-modules = $(addprefix tst-tlsmod17a, $(tlsmod17a-suffixes))
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tlsmod18a-modules = $(addprefix tst-tlsmod18a, $(tlsmod17a-suffixes))
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one-hundred = $(foreach x,0 1 2 3 4 5 6 7 8 9, \
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0$x 1$x 2$x 3$x 4$x 5$x 6$x 7$x 8$x 9$x)
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tst-tls-many-dynamic-modules := \
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$(foreach n,$(one-hundred),tst-tls-manydynamic$(n)mod)
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extra-test-objs += $(tlsmod17a-modules:=.os) $(tlsmod18a-modules:=.os) \
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tst-tlsalign-vars.o
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test-extras += tst-tlsmod17a tst-tlsmod18a tst-tlsalign-vars
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@ -227,7 +231,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
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tst-tlsalign-lib tst-nodelete-opened-lib tst-nodelete2mod \
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tst-audit11mod1 tst-audit11mod2 tst-auditmod11 \
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tst-audit12mod1 tst-audit12mod2 tst-audit12mod3 tst-auditmod12 \
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tst-latepthreadmod
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tst-latepthreadmod $(tst-tls-many-dynamic-modules)
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ifeq (yes,$(have-mtls-dialect-gnu2))
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tests += tst-gnu2-tls1
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modules-names += tst-gnu2-tls1mod
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@ -1278,6 +1282,15 @@ $(objpfx)tst-latepthreadmod.so: $(shared-thread-library)
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$(objpfx)tst-latepthread: $(libdl)
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$(objpfx)tst-latepthread.out: $(objpfx)tst-latepthreadmod.so
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# The test modules are parameterized by preprocessor macros.
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$(patsubst %,$(objpfx)%.os,$(tst-tls-many-dynamic-modules)): \
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$(objpfx)tst-tls-manydynamic%mod.os : tst-tls-manydynamicmod.c
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$(compile-command.c) \
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-DNAME=tls_global_$* -DSETTER=set_value_$* -DGETTER=get_value_$*
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$(objpfx)tst-tls-manydynamic: $(libdl) $(shared-thread-library)
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$(objpfx)tst-tls-manydynamic.out: \
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$(patsubst %,$(objpfx)%.so,$(tst-tls-many-dynamic-modules))
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tst-prelink-ENV = LD_TRACE_PRELINKING=1
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$(objpfx)tst-prelink-conflict.out: $(objpfx)tst-prelink.out
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150
elf/tst-tls-manydynamic.c
Normal file
150
elf/tst-tls-manydynamic.c
Normal file
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@ -0,0 +1,150 @@
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/* Test with many dynamic TLS variables.
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Copyright (C) 2016 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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<http://www.gnu.org/licenses/>. */
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/* This test intends to exercise dynamic TLS variable allocation. It
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achieves this by combining dlopen (to avoid static TLS allocation
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after static TLS resizing), many DSOs with a large variable (to
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exceed the static TLS reserve), and an already-running thread (to
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force full dynamic TLS initialization). */
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#include "tst-tls-manydynamic.h"
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#include <dlfcn.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static int do_test (void);
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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void *handles[COUNT];
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set_value_func set_value_funcs[COUNT];
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get_value_func get_value_funcs[COUNT];
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static void
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init_functions (void)
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{
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for (int i = 0; i < COUNT; ++i)
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{
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/* Open the module. */
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{
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char soname[100];
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snprintf (soname, sizeof (soname), "tst-tls-manydynamic%02dmod.so", i);
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handles[i] = dlopen (soname, RTLD_LAZY);
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if (handles[i] == NULL)
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{
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printf ("error: dlopen failed: %s\n", dlerror ());
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exit (1);
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}
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}
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/* Obtain the setter function. */
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{
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char fname[100];
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snprintf (fname, sizeof (fname), "set_value_%02d", i);
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void *func = dlsym (handles[i], fname);
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if (func == NULL)
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{
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printf ("error: dlsym: %s\n", dlerror ());
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exit (1);
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}
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set_value_funcs[i] = func;
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}
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/* Obtain the getter function. */
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{
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char fname[100];
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snprintf (fname, sizeof (fname), "get_value_%02d", i);
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void *func = dlsym (handles[i], fname);
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if (func == NULL)
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{
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printf ("error: dlsym: %s\n", dlerror ());
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exit (1);
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}
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get_value_funcs[i] = func;
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}
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}
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}
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static pthread_barrier_t barrier;
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/* Running thread which forces real TLS initialization. */
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static void *
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blocked_thread_func (void *closure)
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{
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xpthread_barrier_wait (&barrier);
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/* TLS test runs here in the main thread. */
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xpthread_barrier_wait (&barrier);
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return NULL;
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}
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static int
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do_test (void)
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{
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{
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int ret = pthread_barrier_init (&barrier, NULL, 2);
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if (ret != 0)
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{
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errno = ret;
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printf ("error: pthread_barrier_init: %m\n");
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exit (1);
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}
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}
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pthread_t blocked_thread = xpthread_create (NULL, blocked_thread_func, NULL);
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xpthread_barrier_wait (&barrier);
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init_functions ();
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struct value values[COUNT];
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/* Initialze the TLS variables. */
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for (int i = 0; i < COUNT; ++i)
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{
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for (int j = 0; j < PER_VALUE_COUNT; ++j)
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values[i].num[j] = rand ();
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set_value_funcs[i] (&values[i]);
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}
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/* Read back their values to check that they do not overlap. */
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for (int i = 0; i < COUNT; ++i)
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{
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struct value actual;
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get_value_funcs[i] (&actual);
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for (int j = 0; j < PER_VALUE_COUNT; ++j)
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if (actual.num[j] != values[i].num[j])
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{
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printf ("error: mismatch at variable %d/%d: %d != %d\n",
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i, j, actual.num[j], values[i].num[j]);
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exit (1);
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}
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}
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xpthread_barrier_wait (&barrier);
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xpthread_join (blocked_thread);
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/* Close the modules. */
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for (int i = 0; i < COUNT; ++i)
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dlclose (handles[i]);
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return 0;
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}
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44
elf/tst-tls-manydynamic.h
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44
elf/tst-tls-manydynamic.h
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@ -0,0 +1,44 @@
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/* Interfaces for test with many dynamic TLS variables.
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Copyright (C) 2016 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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<http://www.gnu.org/licenses/>. */
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#ifndef TST_TLS_MANYDYNAMIC_H
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#define TST_TLS_MANYDYNAMIC_H
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enum
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{
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/* This many TLS variables (and modules) are defined. */
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COUNT = 100,
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/* Number of elements in the TLS variable. */
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PER_VALUE_COUNT = 1,
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};
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/* The TLS variables are of this type. We use a larger type to ensure
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that we can reach the static TLS limit with COUNT variables. */
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struct value
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{
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int num[PER_VALUE_COUNT];
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};
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/* Set the TLS variable defined in the module. */
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typedef void (*set_value_func) (const struct value *);
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/* Read the TLS variable defined in the module. */
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typedef void (*get_value_func) (struct value *);
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#endif /* TST_TLS_MANYDYNAMICMOD_H */
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36
elf/tst-tls-manydynamicmod.c
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36
elf/tst-tls-manydynamicmod.c
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@ -0,0 +1,36 @@
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/* Module for test with many dynamic TLS variables.
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Copyright (C) 2016 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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<http://www.gnu.org/licenses/>. */
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/* This file is parameterized by macros NAME, SETTER, GETTER, which
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are set form the Makefile. */
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#include "tst-tls-manydynamic.h"
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__thread struct value NAME;
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void
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SETTER (const struct value *value)
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{
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NAME = *value;
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}
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void
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GETTER (struct value *value)
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{
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*value = NAME;
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}
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