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-rw-r--r--elf/tst-tls-manydynamic.c151
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diff --git a/elf/tst-tls-manydynamic.c b/elf/tst-tls-manydynamic.c
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+/* Test with many dynamic TLS variables.
+ Copyright (C) 2016-2018 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/>. */
+
+/* This test intends to exercise dynamic TLS variable allocation. It
+ achieves this by combining dlopen (to avoid static TLS allocation
+ after static TLS resizing), many DSOs with a large variable (to
+ exceed the static TLS reserve), and an already-running thread (to
+ force full dynamic TLS initialization). */
+
+#include "tst-tls-manydynamic.h"
+
+#include <errno.h>
+#include <dlfcn.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static int do_test (void);
+#include <support/xthread.h>
+#include <support/test-driver.c>
+
+void *handles[COUNT];
+set_value_func set_value_funcs[COUNT];
+get_value_func get_value_funcs[COUNT];
+
+static void
+init_functions (void)
+{
+ for (int i = 0; i < COUNT; ++i)
+ {
+ /* Open the module. */
+ {
+ char soname[100];
+ snprintf (soname, sizeof (soname), "tst-tls-manydynamic%02dmod.so", i);
+ handles[i] = dlopen (soname, RTLD_LAZY);
+ if (handles[i] == NULL)
+ {
+ printf ("error: dlopen failed: %s\n", dlerror ());
+ exit (1);
+ }
+ }
+
+ /* Obtain the setter function. */
+ {
+ char fname[100];
+ snprintf (fname, sizeof (fname), "set_value_%02d", i);
+ void *func = dlsym (handles[i], fname);
+ if (func == NULL)
+ {
+ printf ("error: dlsym: %s\n", dlerror ());
+ exit (1);
+ }
+ set_value_funcs[i] = func;
+ }
+
+ /* Obtain the getter function. */
+ {
+ char fname[100];
+ snprintf (fname, sizeof (fname), "get_value_%02d", i);
+ void *func = dlsym (handles[i], fname);
+ if (func == NULL)
+ {
+ printf ("error: dlsym: %s\n", dlerror ());
+ exit (1);
+ }
+ get_value_funcs[i] = func;
+ }
+ }
+}
+
+static pthread_barrier_t barrier;
+
+/* Running thread which forces real TLS initialization. */
+static void *
+blocked_thread_func (void *closure)
+{
+ xpthread_barrier_wait (&barrier);
+
+ /* TLS test runs here in the main thread. */
+
+ xpthread_barrier_wait (&barrier);
+ return NULL;
+}
+
+static int
+do_test (void)
+{
+ {
+ int ret = pthread_barrier_init (&barrier, NULL, 2);
+ if (ret != 0)
+ {
+ errno = ret;
+ printf ("error: pthread_barrier_init: %m\n");
+ exit (1);
+ }
+ }
+
+ pthread_t blocked_thread = xpthread_create (NULL, blocked_thread_func, NULL);
+ xpthread_barrier_wait (&barrier);
+
+ init_functions ();
+
+ struct value values[COUNT];
+ /* Initialze the TLS variables. */
+ for (int i = 0; i < COUNT; ++i)
+ {
+ for (int j = 0; j < PER_VALUE_COUNT; ++j)
+ values[i].num[j] = rand ();
+ set_value_funcs[i] (&values[i]);
+ }
+
+ /* Read back their values to check that they do not overlap. */
+ for (int i = 0; i < COUNT; ++i)
+ {
+ struct value actual;
+ get_value_funcs[i] (&actual);
+
+ for (int j = 0; j < PER_VALUE_COUNT; ++j)
+ if (actual.num[j] != values[i].num[j])
+ {
+ printf ("error: mismatch at variable %d/%d: %d != %d\n",
+ i, j, actual.num[j], values[i].num[j]);
+ exit (1);
+ }
+ }
+
+ xpthread_barrier_wait (&barrier);
+ xpthread_join (blocked_thread);
+
+ /* Close the modules. */
+ for (int i = 0; i < COUNT; ++i)
+ dlclose (handles[i]);
+
+ return 0;
+}