6-2.c revision 0dc076565f772bb1953209fb69ea150b494aaa40
10dc076565f772bb1953209fb69ea150b494aaa40robbiew/* 20dc076565f772bb1953209fb69ea150b494aaa40robbiew * Copyright (c) 2002, Intel Corporation. All rights reserved. 30dc076565f772bb1953209fb69ea150b494aaa40robbiew * This file is licensed under the GPL license. For the full content 40dc076565f772bb1953209fb69ea150b494aaa40robbiew * of this license, see the COPYING file at the top level of this 50dc076565f772bb1953209fb69ea150b494aaa40robbiew * source tree. 60dc076565f772bb1953209fb69ea150b494aaa40robbiew * Test pthread_rwlock_timedrdlock(pthread_rwlock_t * rwlock) 70dc076565f772bb1953209fb69ea150b494aaa40robbiew * 80dc076565f772bb1953209fb69ea150b494aaa40robbiew * If a signal that causes a signal handler to be executed is delivered to 90dc076565f772bb1953209fb69ea150b494aaa40robbiew * a thread blocked on a read-write lock via a call to pthread_rwlock_timedrdlock( ), 100dc076565f772bb1953209fb69ea150b494aaa40robbiew * upon return from the signal handler the thread shall resume waiting for the lock 110dc076565f772bb1953209fb69ea150b494aaa40robbiew * as if it was not interrupted. 120dc076565f772bb1953209fb69ea150b494aaa40robbiew * 130dc076565f772bb1953209fb69ea150b494aaa40robbiew * Steps: 140dc076565f772bb1953209fb69ea150b494aaa40robbiew * 1. main thread create read-write lock 'rwlock', and lock it for writing 150dc076565f772bb1953209fb69ea150b494aaa40robbiew * 2. main thread create a thread sig_thread, the thread is set to handle SIGUSR1 160dc076565f772bb1953209fb69ea150b494aaa40robbiew * 3. sig_thread timed lock 'rwlock' for reading, but blocked 170dc076565f772bb1953209fb69ea150b494aaa40robbiew * 4. While the sig_thread is waiting(not expried yet), main thread send SIGUSR1 180dc076565f772bb1953209fb69ea150b494aaa40robbiew * to sig_thread via pthread_kill 190dc076565f772bb1953209fb69ea150b494aaa40robbiew * 5. test that thread handler is called, inside the handler, make the thread sleep 200dc076565f772bb1953209fb69ea150b494aaa40robbiew * for a period that the specified 'timeout' for pthread_rwlock_timedrdlock() 210dc076565f772bb1953209fb69ea150b494aaa40robbiew * should have expired (timeout * 2) 220dc076565f772bb1953209fb69ea150b494aaa40robbiew * 6. While sig_thread sleeping in signal handler, main thread unlock 'rwlock' 230dc076565f772bb1953209fb69ea150b494aaa40robbiew * 7. check that when thread handler returns, sig_thread get the read lock without 240dc076565f772bb1953209fb69ea150b494aaa40robbiew * getting ETIMEDOUT. 250dc076565f772bb1953209fb69ea150b494aaa40robbiew */ 260dc076565f772bb1953209fb69ea150b494aaa40robbiew 270dc076565f772bb1953209fb69ea150b494aaa40robbiew#define _XOPEN_SOURCE 600 280dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <pthread.h> 290dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <stdio.h> 300dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <stdlib.h> 310dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <signal.h> 320dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <errno.h> 330dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <unistd.h> 340dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <time.h> 350dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <sys/time.h> 360dc076565f772bb1953209fb69ea150b494aaa40robbiew#include "posixtest.h" 370dc076565f772bb1953209fb69ea150b494aaa40robbiew 380dc076565f772bb1953209fb69ea150b494aaa40robbiew/* thread_state indicates child thread state: 390dc076565f772bb1953209fb69ea150b494aaa40robbiew 1: not in child thread yet; 400dc076565f772bb1953209fb69ea150b494aaa40robbiew 2: just enter child thread ; 410dc076565f772bb1953209fb69ea150b494aaa40robbiew 3: just before child thread exit; 420dc076565f772bb1953209fb69ea150b494aaa40robbiew*/ 430dc076565f772bb1953209fb69ea150b494aaa40robbiew 440dc076565f772bb1953209fb69ea150b494aaa40robbiew#define NOT_CREATED_THREAD 1 450dc076565f772bb1953209fb69ea150b494aaa40robbiew#define ENTERED_THREAD 2 460dc076565f772bb1953209fb69ea150b494aaa40robbiew#define EXITING_THREAD 3 470dc076565f772bb1953209fb69ea150b494aaa40robbiew 480dc076565f772bb1953209fb69ea150b494aaa40robbiew#define TIMEOUT 2 490dc076565f772bb1953209fb69ea150b494aaa40robbiew 500dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic pthread_t sig_thread; 510dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic pthread_rwlock_t rwlock; 520dc076565f772bb1953209fb69ea150b494aaa40robbiew 530dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic int thread_state; 540dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic int handler_state; 550dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic int expired; 560dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic struct timeval before_wait, after_wait; 570dc076565f772bb1953209fb69ea150b494aaa40robbiew 580dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic void sig_handler() { 590dc076565f772bb1953209fb69ea150b494aaa40robbiew 600dc076565f772bb1953209fb69ea150b494aaa40robbiew struct timespec sleep_time_req; 610dc076565f772bb1953209fb69ea150b494aaa40robbiew 620dc076565f772bb1953209fb69ea150b494aaa40robbiew sleep_time_req.tv_sec = TIMEOUT*2; 630dc076565f772bb1953209fb69ea150b494aaa40robbiew sleep_time_req.tv_nsec = 0; 640dc076565f772bb1953209fb69ea150b494aaa40robbiew 650dc076565f772bb1953209fb69ea150b494aaa40robbiew if(pthread_equal(pthread_self(), sig_thread)) 660dc076565f772bb1953209fb69ea150b494aaa40robbiew { 670dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("sig_handler: signal is handled by thread\n"); 680dc076565f772bb1953209fb69ea150b494aaa40robbiew /* sig_handler will not sleep 2 times more than the timeout for the 690dc076565f772bb1953209fb69ea150b494aaa40robbiew * pthread_rwlock_timerdlock is waiting for */ 700dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("sig_handler: sleeping for %d seconds\n", (int)sleep_time_req.tv_sec); 710dc076565f772bb1953209fb69ea150b494aaa40robbiew handler_state = 2; 720dc076565f772bb1953209fb69ea150b494aaa40robbiew sleep((int)sleep_time_req.tv_sec); 730dc076565f772bb1953209fb69ea150b494aaa40robbiew } 740dc076565f772bb1953209fb69ea150b494aaa40robbiew else 750dc076565f772bb1953209fb69ea150b494aaa40robbiew { 760dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("sig_handler: signal is not handled by thread\n"); 770dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 780dc076565f772bb1953209fb69ea150b494aaa40robbiew } 790dc076565f772bb1953209fb69ea150b494aaa40robbiew 800dc076565f772bb1953209fb69ea150b494aaa40robbiew handler_state = 3; 810dc076565f772bb1953209fb69ea150b494aaa40robbiew} 820dc076565f772bb1953209fb69ea150b494aaa40robbiew 830dc076565f772bb1953209fb69ea150b494aaa40robbiewstatic void * th_fn(void *arg) 840dc076565f772bb1953209fb69ea150b494aaa40robbiew{ 850dc076565f772bb1953209fb69ea150b494aaa40robbiew struct sigaction act; 860dc076565f772bb1953209fb69ea150b494aaa40robbiew struct timespec abs_timeout; 870dc076565f772bb1953209fb69ea150b494aaa40robbiew int rc; 880dc076565f772bb1953209fb69ea150b494aaa40robbiew handler_state = 2; 890dc076565f772bb1953209fb69ea150b494aaa40robbiew expired = 0; 900dc076565f772bb1953209fb69ea150b494aaa40robbiew 910dc076565f772bb1953209fb69ea150b494aaa40robbiew /* Set up handler for SIGUSR1 */ 920dc076565f772bb1953209fb69ea150b494aaa40robbiew 930dc076565f772bb1953209fb69ea150b494aaa40robbiew act.sa_flags = 0; 940dc076565f772bb1953209fb69ea150b494aaa40robbiew act.sa_handler = sig_handler; 950dc076565f772bb1953209fb69ea150b494aaa40robbiew /* block all the signal when hanlding SIGUSR1 */ 960dc076565f772bb1953209fb69ea150b494aaa40robbiew sigfillset(&act.sa_mask); 970dc076565f772bb1953209fb69ea150b494aaa40robbiew sigaction(SIGUSR1, &act, 0); 980dc076565f772bb1953209fb69ea150b494aaa40robbiew 990dc076565f772bb1953209fb69ea150b494aaa40robbiew gettimeofday(&before_wait, NULL); 1000dc076565f772bb1953209fb69ea150b494aaa40robbiew abs_timeout.tv_sec = before_wait.tv_sec + TIMEOUT; 1010dc076565f772bb1953209fb69ea150b494aaa40robbiew abs_timeout.tv_nsec = before_wait.tv_usec * 1000; 1020dc076565f772bb1953209fb69ea150b494aaa40robbiew 1030dc076565f772bb1953209fb69ea150b494aaa40robbiew thread_state = ENTERED_THREAD; 1040dc076565f772bb1953209fb69ea150b494aaa40robbiew 1050dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("thread: attempt timed read lock, %d seconds\n", TIMEOUT); 1060dc076565f772bb1953209fb69ea150b494aaa40robbiew rc = pthread_rwlock_timedrdlock(&rwlock, &abs_timeout); 1070dc076565f772bb1953209fb69ea150b494aaa40robbiew if(rc == 0) 1080dc076565f772bb1953209fb69ea150b494aaa40robbiew { 1090dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("thread: correctly acquired read lock\n"); 1100dc076565f772bb1953209fb69ea150b494aaa40robbiew expired = 0; 1110dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1120dc076565f772bb1953209fb69ea150b494aaa40robbiew else if(rc == ETIMEDOUT) 1130dc076565f772bb1953209fb69ea150b494aaa40robbiew { 1140dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("thread: timer expired, did not acquire read lock"); 1150dc076565f772bb1953209fb69ea150b494aaa40robbiew expired = 1; 1160dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1170dc076565f772bb1953209fb69ea150b494aaa40robbiew else 1180dc076565f772bb1953209fb69ea150b494aaa40robbiew { 1190dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error at pthread_rwlock_timedrdlock()"); 1200dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 1210dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1220dc076565f772bb1953209fb69ea150b494aaa40robbiew 1230dc076565f772bb1953209fb69ea150b494aaa40robbiew gettimeofday(&after_wait, NULL); 1240dc076565f772bb1953209fb69ea150b494aaa40robbiew 1250dc076565f772bb1953209fb69ea150b494aaa40robbiew thread_state = EXITING_THREAD; 1260dc076565f772bb1953209fb69ea150b494aaa40robbiew pthread_exit(0); 1270dc076565f772bb1953209fb69ea150b494aaa40robbiew return NULL; 1280dc076565f772bb1953209fb69ea150b494aaa40robbiew} 1290dc076565f772bb1953209fb69ea150b494aaa40robbiew 1300dc076565f772bb1953209fb69ea150b494aaa40robbiewint main() 1310dc076565f772bb1953209fb69ea150b494aaa40robbiew{ 1320dc076565f772bb1953209fb69ea150b494aaa40robbiew int cnt; 1330dc076565f772bb1953209fb69ea150b494aaa40robbiew 1340dc076565f772bb1953209fb69ea150b494aaa40robbiew if(pthread_rwlock_init(&rwlock, NULL) != 0) 1350dc076565f772bb1953209fb69ea150b494aaa40robbiew { 1360dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error at pthread_rwlock_init()\n"); 1370dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_UNRESOLVED; 1380dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1390dc076565f772bb1953209fb69ea150b494aaa40robbiew 1400dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("main: attempt write lock\n"); 1410dc076565f772bb1953209fb69ea150b494aaa40robbiew if(pthread_rwlock_wrlock(&rwlock) != 0) 1420dc076565f772bb1953209fb69ea150b494aaa40robbiew { 1430dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("pthread_rwlock_wrlock()\n"); 1440dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_UNRESOLVED; 1450dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1460dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("main: acquired write lock\n"); 1470dc076565f772bb1953209fb69ea150b494aaa40robbiew 1480dc076565f772bb1953209fb69ea150b494aaa40robbiew thread_state = NOT_CREATED_THREAD; 1490dc076565f772bb1953209fb69ea150b494aaa40robbiew if(pthread_create(&sig_thread, NULL, th_fn, NULL) != 0) 1500dc076565f772bb1953209fb69ea150b494aaa40robbiew { 1510dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error at pthread_create()\n"); 1520dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_UNRESOLVED; 1530dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1540dc076565f772bb1953209fb69ea150b494aaa40robbiew 1550dc076565f772bb1953209fb69ea150b494aaa40robbiew /* wait for the thread to get ready for handling signal */ 1560dc076565f772bb1953209fb69ea150b494aaa40robbiew cnt = 0; 1570dc076565f772bb1953209fb69ea150b494aaa40robbiew do{ 1580dc076565f772bb1953209fb69ea150b494aaa40robbiew sleep(1); 1590dc076565f772bb1953209fb69ea150b494aaa40robbiew }while(thread_state != ENTERED_THREAD && cnt++ < TIMEOUT); 1600dc076565f772bb1953209fb69ea150b494aaa40robbiew 1610dc076565f772bb1953209fb69ea150b494aaa40robbiew if(thread_state != ENTERED_THREAD) 1620dc076565f772bb1953209fb69ea150b494aaa40robbiew { 1630dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error: thread did not block when getting read lock\n"); 1640dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 1650dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1660dc076565f772bb1953209fb69ea150b494aaa40robbiew 1670dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("main: fire SIGUSR1 to thread\n"); 1680dc076565f772bb1953209fb69ea150b494aaa40robbiew if(pthread_kill(sig_thread, SIGUSR1) != 0) 1690dc076565f772bb1953209fb69ea150b494aaa40robbiew { 1700dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error in pthread_kill()"); 1710dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 1720dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1730dc076565f772bb1953209fb69ea150b494aaa40robbiew 1740dc076565f772bb1953209fb69ea150b494aaa40robbiew /* Wait for signal handler to sleep so that main can unlock the rwlock while 1750dc076565f772bb1953209fb69ea150b494aaa40robbiew * it is sleeping. (this way, the rwlock will be unlocked when the signal handler 1760dc076565f772bb1953209fb69ea150b494aaa40robbiew * returns, and control is given back to the thread) */ 1770dc076565f772bb1953209fb69ea150b494aaa40robbiew 1780dc076565f772bb1953209fb69ea150b494aaa40robbiew cnt = 0; 1790dc076565f772bb1953209fb69ea150b494aaa40robbiew do{ 1800dc076565f772bb1953209fb69ea150b494aaa40robbiew sleep(TIMEOUT); 1810dc076565f772bb1953209fb69ea150b494aaa40robbiew }while(handler_state !=2 && cnt++ < 2); 1820dc076565f772bb1953209fb69ea150b494aaa40robbiew 1830dc076565f772bb1953209fb69ea150b494aaa40robbiew if(handler_state == 1) 1840dc076565f772bb1953209fb69ea150b494aaa40robbiew { 1850dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error: signal handler did not get called\n"); 1860dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 1870dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1880dc076565f772bb1953209fb69ea150b494aaa40robbiew else if(handler_state == 3) 1890dc076565f772bb1953209fb69ea150b494aaa40robbiew { 1900dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error: signal handler incorrectly exited\n"); 1910dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 1920dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1930dc076565f772bb1953209fb69ea150b494aaa40robbiew 1940dc076565f772bb1953209fb69ea150b494aaa40robbiew if(expired == 1) 1950dc076565f772bb1953209fb69ea150b494aaa40robbiew { 1960dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error: thread timeout in sig_handler\n"); 1970dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 1980dc076565f772bb1953209fb69ea150b494aaa40robbiew } 1990dc076565f772bb1953209fb69ea150b494aaa40robbiew 2000dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("main: unlock write lock\n"); 2010dc076565f772bb1953209fb69ea150b494aaa40robbiew if(pthread_rwlock_unlock(&rwlock) != 0) 2020dc076565f772bb1953209fb69ea150b494aaa40robbiew { 2030dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error at pthread_rwlock_unlock()\n"); 2040dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 2050dc076565f772bb1953209fb69ea150b494aaa40robbiew } 2060dc076565f772bb1953209fb69ea150b494aaa40robbiew 2070dc076565f772bb1953209fb69ea150b494aaa40robbiew /* wait at most 4*TIMEOUT seconds for thread to exit */ 2080dc076565f772bb1953209fb69ea150b494aaa40robbiew cnt = 0; 2090dc076565f772bb1953209fb69ea150b494aaa40robbiew do{ 2100dc076565f772bb1953209fb69ea150b494aaa40robbiew sleep(1); 2110dc076565f772bb1953209fb69ea150b494aaa40robbiew }while(thread_state != EXITING_THREAD && cnt++ < 4*TIMEOUT); 2120dc076565f772bb1953209fb69ea150b494aaa40robbiew 2130dc076565f772bb1953209fb69ea150b494aaa40robbiew 2140dc076565f772bb1953209fb69ea150b494aaa40robbiew if(cnt >= 4*TIMEOUT) 2150dc076565f772bb1953209fb69ea150b494aaa40robbiew { 2160dc076565f772bb1953209fb69ea150b494aaa40robbiew /* thread blocked*/ 2170dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Test FAILED: thread blocked even afer the abs_timeout expires\n"); 2180dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_FAIL); 2190dc076565f772bb1953209fb69ea150b494aaa40robbiew } 2200dc076565f772bb1953209fb69ea150b494aaa40robbiew 2210dc076565f772bb1953209fb69ea150b494aaa40robbiew if(expired == 1) 2220dc076565f772bb1953209fb69ea150b494aaa40robbiew { 2230dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Test FAILED: thread should get the read lock\n"); 2240dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_FAIL); 2250dc076565f772bb1953209fb69ea150b494aaa40robbiew } 2260dc076565f772bb1953209fb69ea150b494aaa40robbiew 2270dc076565f772bb1953209fb69ea150b494aaa40robbiew if(pthread_join(sig_thread, NULL) != 0) 2280dc076565f772bb1953209fb69ea150b494aaa40robbiew { 2290dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error at pthread_join()"); 2300dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_UNRESOLVED; 2310dc076565f772bb1953209fb69ea150b494aaa40robbiew } 2320dc076565f772bb1953209fb69ea150b494aaa40robbiew 2330dc076565f772bb1953209fb69ea150b494aaa40robbiew if(pthread_rwlock_destroy(&rwlock) != 0) 2340dc076565f772bb1953209fb69ea150b494aaa40robbiew { 2350dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Error at pthread_destroy()"); 2360dc076565f772bb1953209fb69ea150b494aaa40robbiew exit(PTS_UNRESOLVED); 2370dc076565f772bb1953209fb69ea150b494aaa40robbiew } 2380dc076565f772bb1953209fb69ea150b494aaa40robbiew 2390dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Test PASSED\n"); 2400dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_PASS; 2410dc076565f772bb1953209fb69ea150b494aaa40robbiew} 242