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// tls_test.cc -- test TLS variables for gold, main function
// Copyright (C) 2006-2020 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// This program 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 General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.
// This is the main function for the TLS test. See tls_test.cc for
// more information.
#include <cassert>
#include <cstdio>
#include <pthread.h>
#include <semaphore.h>
#include "tls_test.h"
// We make these macros so the assert() will give useful line-numbers.
#define safe_lock(semptr) \
do \
{ \
int err = sem_wait(semptr); \
assert(err == 0); \
} \
while (0)
#define safe_unlock(semptr) \
do \
{ \
int err = sem_post(semptr); \
assert(err == 0); \
} \
while (0)
struct Sem_set
{
sem_t sem1;
sem_t sem2;
sem_t sem3;
};
Sem_set sems1;
Sem_set sems2;
bool failed = false;
void
check(const char* name, bool val)
{
if (!val)
{
fprintf(stderr, "Test %s failed\n", name);
failed = true;
}
}
// The body of the thread function. This acquires the first
// semaphore, runs the tests, and then releases the second semaphore.
// Then it acquires the third semaphore, and the runs the verification
// test again.
void*
thread_routine(void* arg)
{
Sem_set* pms = static_cast<Sem_set*>(arg);
// Acquire the first semaphore.
if (pms)
safe_lock(&pms->sem1);
// Run the tests.
check("t1", t1());
check("t2", t2());
check("t3", t3());
check("t4", t4());
f5b(f5a());
check("t5", t5());
f6b(f6a());
check("t6", t6());
check("t8", t8());
check("t9", t9());
f10b(f10a());
check("t10", t10());
check("t11", t11() != 0);
check("t12", t12());
check("t_last", t_last());
// Release the second semaphore.
if (pms)
safe_unlock(&pms->sem2);
// Acquire the third semaphore.
if (pms)
safe_lock(&pms->sem3);
check("t_last", t_last());
return 0;
}
// The main function.
int
main()
{
// First, as a sanity check, run through the tests in the "main" thread.
thread_routine(0);
// Set up the semaphores. We want the first thread to start right
// away, tell us when it is done with the first part, and wait for
// us to release it. We want the second thread to wait to start,
// tell us when it is done with the first part, and wait for us to
// release it.
sem_init(&sems1.sem1, 0, 1);
sem_init(&sems1.sem2, 0, 0);
sem_init(&sems1.sem3, 0, 0);
sem_init(&sems2.sem1, 0, 0);
sem_init(&sems2.sem2, 0, 0);
sem_init(&sems2.sem3, 0, 0);
pthread_t thread1;
int err = pthread_create(&thread1, NULL, thread_routine, &sems1);
assert(err == 0);
pthread_t thread2;
err = pthread_create(&thread2, NULL, thread_routine, &sems2);
assert(err == 0);
// Wait for the first thread to complete the first part.
safe_lock(&sems1.sem2);
// Tell the second thread to start.
safe_unlock(&sems2.sem1);
// Wait for the second thread to complete the first part.
safe_lock(&sems2.sem2);
// Tell the first thread to continue and finish.
safe_unlock(&sems1.sem3);
// Wait for the first thread to finish.
void* thread_val;
err = pthread_join(thread1, &thread_val);
assert(err == 0);
assert(thread_val == 0);
// Tell the second thread to continue and finish.
safe_unlock(&sems2.sem3);
// Wait for the second thread to finish.
err = pthread_join(thread2, &thread_val);
assert(err == 0);
assert(thread_val == 0);
// All done.
return failed ? 1 : 0;
}
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