1 /* 2 * Copyright (c) 2005, Bull S.A.. All rights reserved. 3 * Created by: Sebastien Decugis 4 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of version 2 of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 12 * 13 * You should have received a copy of the GNU General Public License along 14 * with this program; if not, write the Free Software Foundation, Inc., 15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 16 17 * This sample test aims to check the following assertion: 18 * 19 * If the function fails, the policy and parameter of the target thread 20 * shall not be modified. 21 22 * The steps are: 23 * -> Create a new thread 24 * -> Change its priority to a known valid value. 25 * -> Change its priority to an invalid value. 26 27 * The test fails if the priority is changed and an error returned. 28 */ 29 30 /* We are testing conformance to IEEE Std 1003.1, 2003 Edition */ 31 #define _POSIX_C_SOURCE 200112L 32 33 /******************************************************************************/ 34 /*********************** standard includes ************************************/ 35 /******************************************************************************/ 36 #include <pthread.h> 37 #include <stdarg.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 43 #include <sched.h> 44 #include <errno.h> 45 46 /******************************************************************************/ 47 /*********************** Test framework ***********************************/ 48 /******************************************************************************/ 49 #include "../testfrmw/testfrmw.h" 50 #include "../testfrmw/testfrmw.c" 51 /* This header is responsible for defining the following macros: 52 * UNRESOLVED(ret, descr); 53 * where descr is a description of the error and ret is an int 54 * (error code for example) 55 * FAILED(descr); 56 * where descr is a short text saying why the test has failed. 57 * PASSED(); 58 * No parameter. 59 * 60 * Both three macros shall terminate the calling process. 61 * The testcase shall not terminate in any other maneer. 62 * 63 * The other file defines the functions 64 * void output_init() 65 * void output(char * string, ...) 66 * 67 * Those may be used to output information. 68 */ 69 70 /******************************************************************************/ 71 /***************************** Configuration **********************************/ 72 /******************************************************************************/ 73 #ifndef VERBOSE 74 #define VERBOSE 1 75 #endif 76 77 /******************************************************************************/ 78 /***************************** Test case *********************************/ 79 /******************************************************************************/ 80 81 /* This function checks the thread policy & priority */ 82 void check_param(pthread_t thread, int policy, int priority) 83 { 84 int ret = 0; 85 86 int t_pol; 87 88 struct sched_param t_parm; 89 90 /* Check the priority is valid */ 91 92 if (priority == -1) { 93 UNRESOLVED(errno, "Wrong priority value"); 94 } 95 96 /* Get the thread's parameters */ 97 ret = pthread_getschedparam(thread, &t_pol, &t_parm); 98 99 if (ret != 0) { 100 UNRESOLVED(ret, "Failed to get thread's parameters"); 101 } 102 103 if (t_pol != policy) { 104 FAILED("The thread's policy is not as expected"); 105 } 106 107 if (t_parm.sched_priority != priority) { 108 FAILED("The thread's priority is not as expected"); 109 } 110 } 111 112 /* thread function */ 113 void *threaded(void *arg) 114 { 115 int ret = 0; 116 117 struct sched_param sp; 118 119 /* Set priority to a known value */ 120 sp.sched_priority = sched_get_priority_max(SCHED_RR); 121 122 ret = pthread_setschedparam(pthread_self(), SCHED_RR, &sp); 123 124 if (ret != 0) { 125 UNRESOLVED(ret, 126 "Failed to set thread policy -- need to be root?"); 127 } 128 129 /* check the thread attributes have been applied 130 (we only check what is reported, not the real behavior) 131 */ 132 check_param(pthread_self(), SCHED_RR, sp.sched_priority); 133 134 /* Now set the priority to an invalid value. */ 135 sp.sched_priority++; 136 137 ret = pthread_setschedparam(pthread_self(), SCHED_RR, &sp); 138 139 if (ret != 0) { 140 /* check the thread attributes have been applied 141 (we only check what is reported, not the real behavior) 142 */ 143 check_param(pthread_self(), SCHED_RR, sp.sched_priority - 1); 144 #if VERBOSE > 0 145 output 146 ("Setting to a wrong priority failed with error %d (%s).\n", 147 ret, strerror(ret)); 148 } else { 149 output("UNTESTED: setting to max prio + 1 did not fail.\n"); 150 #endif 151 152 } 153 154 return NULL; 155 } 156 157 /* The main test function. */ 158 int main(void) 159 { 160 int ret = 0; 161 pthread_t child; 162 163 /* Initialize output routine */ 164 output_init(); 165 166 /* Create the controler thread */ 167 ret = pthread_create(&child, NULL, threaded, NULL); 168 169 if (ret != 0) { 170 UNRESOLVED(ret, "thread creation failed"); 171 } 172 173 ret = pthread_join(child, NULL); 174 175 if (ret != 0) { 176 UNRESOLVED(ret, "Failed to join the thread"); 177 } 178 #if VERBOSE > 0 179 output("Test PASSED.\n"); 180 181 #endif 182 183 PASSED; 184 } 185
