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I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
175 lines
5.9 KiB
C
175 lines
5.9 KiB
C
/* Test support for single-thread optimizations. With threads.
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Copyright (C) 2020-2021 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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<https://www.gnu.org/licenses/>. */
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#include <stddef.h>
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#include <stdio.h>
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#include <support/check.h>
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#include <support/namespace.h>
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#include <support/xdlfcn.h>
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#include <support/xthread.h>
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#include <sys/single_threaded.h>
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/* First barrier synchronizes main thread, thread 1, thread 2. */
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static pthread_barrier_t barrier1;
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/* Second barrier synchronizes main thread, thread 2. */
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static pthread_barrier_t barrier2;
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/* Defined in tst-single-threaded-mod1.so. */
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_Bool single_threaded_1 (void);
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/* Initialized via dlsym. */
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static _Bool (*single_threaded_2) (void);
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static _Bool (*single_threaded_3) (void);
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static _Bool (*single_threaded_4) (void);
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static void *
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threadfunc (void *closure)
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{
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TEST_VERIFY (!__libc_single_threaded);
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TEST_VERIFY (!single_threaded_1 ());
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TEST_VERIFY (!single_threaded_2 ());
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/* Wait until the main thread loads more functions. */
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xpthread_barrier_wait (&barrier1);
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TEST_VERIFY (!__libc_single_threaded);
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TEST_VERIFY (!single_threaded_1 ());
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TEST_VERIFY (!single_threaded_2 ());
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TEST_VERIFY (!single_threaded_3 ());
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TEST_VERIFY (!single_threaded_4 ());
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/* Second thread waits on second barrier, too. */
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if (closure != NULL)
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xpthread_barrier_wait (&barrier2);
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TEST_VERIFY (!__libc_single_threaded);
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TEST_VERIFY (!single_threaded_1 ());
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TEST_VERIFY (!single_threaded_2 ());
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TEST_VERIFY (!single_threaded_3 ());
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TEST_VERIFY (!single_threaded_4 ());
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return NULL;
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}
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/* Used for closure arguments to the subprocess function. */
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static char expected_false = 0;
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static char expected_true = 1;
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/* A subprocess inherits currently inherits the single-threaded state
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of the parent process. */
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static void
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subprocess (void *closure)
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{
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const char *expected = closure;
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TEST_COMPARE (__libc_single_threaded, *expected);
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TEST_COMPARE (single_threaded_1 (), *expected);
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if (single_threaded_2 != NULL)
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TEST_COMPARE (single_threaded_2 (), *expected);
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if (single_threaded_3 != NULL)
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TEST_COMPARE (single_threaded_3 (), *expected);
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if (single_threaded_4 != NULL)
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TEST_VERIFY (!single_threaded_4 ());
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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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printf ("info: main __libc_single_threaded address: %p\n",
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&__libc_single_threaded);
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TEST_VERIFY (__libc_single_threaded);
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TEST_VERIFY (single_threaded_1 ());
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support_isolate_in_subprocess (subprocess, &expected_true);
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void *handle_mod2 = xdlopen ("tst-single_threaded-mod2.so", RTLD_LAZY);
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single_threaded_2 = xdlsym (handle_mod2, "single_threaded_2");
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TEST_VERIFY (single_threaded_2 ());
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/* Two threads plus main thread. */
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xpthread_barrier_init (&barrier1, NULL, 3);
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/* Main thread and second thread. */
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xpthread_barrier_init (&barrier2, NULL, 2);
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pthread_t thr1 = xpthread_create (NULL, threadfunc, NULL);
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TEST_VERIFY (!__libc_single_threaded);
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TEST_VERIFY (!single_threaded_1 ());
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TEST_VERIFY (!single_threaded_2 ());
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support_isolate_in_subprocess (subprocess, &expected_false);
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pthread_t thr2 = xpthread_create (NULL, threadfunc, &thr2);
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TEST_VERIFY (!__libc_single_threaded);
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TEST_VERIFY (!single_threaded_1 ());
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TEST_VERIFY (!single_threaded_2 ());
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support_isolate_in_subprocess (subprocess, &expected_false);
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/* Delayed library load, while already multi-threaded. */
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void *handle_mod3 = xdlopen ("tst-single_threaded-mod3.so", RTLD_LAZY);
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single_threaded_3 = xdlsym (handle_mod3, "single_threaded_3");
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TEST_VERIFY (!__libc_single_threaded);
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TEST_VERIFY (!single_threaded_1 ());
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TEST_VERIFY (!single_threaded_2 ());
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TEST_VERIFY (!single_threaded_3 ());
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support_isolate_in_subprocess (subprocess, &expected_false);
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/* Same with dlmopen. */
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void *handle_mod4 = dlmopen (LM_ID_NEWLM, "tst-single_threaded-mod4.so",
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RTLD_LAZY);
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single_threaded_4 = xdlsym (handle_mod4, "single_threaded_4");
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TEST_VERIFY (!__libc_single_threaded);
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TEST_VERIFY (!single_threaded_1 ());
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TEST_VERIFY (!single_threaded_2 ());
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TEST_VERIFY (!single_threaded_3 ());
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TEST_VERIFY (!single_threaded_4 ());
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support_isolate_in_subprocess (subprocess, &expected_false);
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/* Run the newly loaded functions from the other threads as
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well. */
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xpthread_barrier_wait (&barrier1);
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TEST_VERIFY (!__libc_single_threaded);
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TEST_VERIFY (!single_threaded_1 ());
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TEST_VERIFY (!single_threaded_2 ());
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TEST_VERIFY (!single_threaded_3 ());
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TEST_VERIFY (!single_threaded_4 ());
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support_isolate_in_subprocess (subprocess, &expected_false);
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/* Join first thread. This should not bring us back into
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single-threaded mode. */
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xpthread_join (thr1);
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TEST_VERIFY (!__libc_single_threaded);
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TEST_VERIFY (!single_threaded_1 ());
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TEST_VERIFY (!single_threaded_2 ());
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TEST_VERIFY (!single_threaded_3 ());
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TEST_VERIFY (!single_threaded_4 ());
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support_isolate_in_subprocess (subprocess, &expected_false);
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/* We may be back in single-threaded mode after joining both
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threads, but this is not guaranteed. */
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xpthread_barrier_wait (&barrier2);
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xpthread_join (thr2);
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printf ("info: __libc_single_threaded after joining all threads: %d\n",
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__libc_single_threaded);
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xdlclose (handle_mod4);
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xdlclose (handle_mod3);
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xdlclose (handle_mod2);
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return 0;
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}
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#include <support/test-driver.c>
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