diff options
| -rw-r--r-- | elf/Makefile | 9 | ||||
| -rw-r--r-- | elf/tst-tls21.c | 68 | ||||
| -rw-r--r-- | elf/tst-tls21mod.c | 1 |
3 files changed, 76 insertions, 2 deletions
diff --git a/elf/Makefile b/elf/Makefile index d3e909637a..3241cb6046 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -224,7 +224,7 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \ tst-single_threaded tst-single_threaded-pthread \ tst-tls-ie tst-tls-ie-dlmopen argv0test \ tst-glibc-hwcaps tst-glibc-hwcaps-prepend tst-glibc-hwcaps-mask \ - tst-tls20 tst-dlmopen-dlerror + tst-tls20 tst-tls21 tst-dlmopen-dlerror # reldep9 tests-internal += loadtest unload unload2 circleload1 \ neededtest neededtest2 neededtest3 neededtest4 \ @@ -346,7 +346,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \ libmarkermod2-1 libmarkermod2-2 \ libmarkermod3-1 libmarkermod3-2 libmarkermod3-3 \ libmarkermod4-1 libmarkermod4-2 libmarkermod4-3 libmarkermod4-4 \ - tst-tls20mod-bad tst-dlmopen-dlerror-mod \ + tst-tls20mod-bad tst-tls21mod tst-dlmopen-dlerror-mod \ # Most modules build with _ISOMAC defined, but those filtered out # depend on internal headers. @@ -1939,3 +1939,8 @@ tst-tls20mod-bad.so-no-z-defs = yes $(objpfx)tst-tls20: $(libdl) $(shared-thread-library) $(objpfx)tst-tls20.out: $(objpfx)tst-tls20mod-bad.so \ $(tst-tls-many-dynamic-modules:%=$(objpfx)%.so) + +# Reuses tst-tls-many-dynamic-modules +$(objpfx)tst-tls21: $(libdl) $(shared-thread-library) +$(objpfx)tst-tls21.out: $(objpfx)tst-tls21mod.so +$(objpfx)tst-tls21mod.so: $(tst-tls-many-dynamic-modules:%=$(objpfx)%.so) diff --git a/elf/tst-tls21.c b/elf/tst-tls21.c new file mode 100644 index 0000000000..560bf5813a --- /dev/null +++ b/elf/tst-tls21.c @@ -0,0 +1,68 @@ +/* Test concurrent dlopen and pthread_create: BZ 19329. + Copyright (C) 2021 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 + <http://www.gnu.org/licenses/>. */ + +#include <dlfcn.h> +#include <pthread.h> +#include <stdio.h> +#include <stdatomic.h> +#include <support/xdlfcn.h> +#include <support/xthread.h> + +#define THREADS 10000 + +static atomic_int done; + +static void * +start (void *a) +{ + /* Load a module with many dependencies that each have TLS. */ + xdlopen ("tst-tls21mod.so", RTLD_LAZY); + atomic_store_explicit (&done, 1, memory_order_release); + return 0; +} + +static void * +nop (void *a) +{ + return 0; +} + +static int +do_test (void) +{ + pthread_t t1, t2; + int i; + + /* Load a module with lots of dependencies and TLS. */ + t1 = xpthread_create (0, start, 0); + + /* Concurrently create lots of threads until dlopen is observably done. */ + for (i = 0; i < THREADS; i++) + { + if (atomic_load_explicit (&done, memory_order_acquire) != 0) + break; + t2 = xpthread_create (0, nop, 0); + xpthread_join (t2); + } + + xpthread_join (t1); + printf ("threads created during dlopen: %d\n", i); + return 0; +} + +#include <support/test-driver.c> diff --git a/elf/tst-tls21mod.c b/elf/tst-tls21mod.c new file mode 100644 index 0000000000..206ece4fb3 --- /dev/null +++ b/elf/tst-tls21mod.c @@ -0,0 +1 @@ +int __thread x; |