1 /* 2 * getrusage03_child.c - a child program executed by getrusage03 3 * 4 * Copyright (C) 2011 Red Hat, Inc. 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of version 2 of the GNU General Public 7 * License as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 12 * 13 * Further, this software is distributed without any warranty that it 14 * is free of the rightful claim of any third person regarding 15 * infringement or the like. Any license provided herein, whether 16 * implied or otherwise, applies only to this software file. Patent 17 * licenses, if any, provided herein do not apply to combinations of 18 * this program with other software, or any other product whatsoever. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 23 * 02110-1301, USA. 24 */ 25 #include <sys/types.h> 26 #include <sys/resource.h> 27 #include <sys/time.h> 28 #include <sys/wait.h> 29 #include <errno.h> 30 #include <unistd.h> 31 #include <stdio.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <limits.h> 35 36 #include "test.h" 37 #include "safe_macros.h" 38 39 char *TCID = "getrusage03_child"; 40 int TST_TOTAL = 1; 41 42 #define DELTA_MAX 10240 43 44 static int opt_consume, opt_grand, opt_show, opt_self, opt_child; 45 static char *consume_str, *grand_consume_str, *self_str, *child_str; 46 47 option_t child_options[] = { 48 {"n:", &opt_consume, &consume_str}, 49 {"g:", &opt_grand, &grand_consume_str}, 50 {"v", &opt_show, NULL}, 51 {"s:", &opt_self, &self_str}, 52 {"l:", &opt_child, &child_str}, 53 {NULL, NULL, NULL} 54 }; 55 56 static void usage(void); 57 static void consume(int mega); 58 static void setup(void); 59 static void cleanup(void); 60 61 int main(int argc, char *argv[]) 62 { 63 int lc; 64 pid_t pid; 65 long maxrss_self, maxrss_children, delta; 66 long consume_nr, grand_consume_nr, self_nr, child_nr; 67 struct rusage ru; 68 69 tst_parse_opts(argc, argv, child_options, usage); 70 71 setup(); 72 73 for (lc = 0; TEST_LOOPING(lc); lc++) { 74 tst_count = 0; 75 76 if (opt_consume) { 77 consume_nr = SAFE_STRTOL(cleanup, 78 consume_str, 0, LONG_MAX); 79 tst_resm(TINFO, "child allocate %ldMB", consume_nr); 80 consume(consume_nr); 81 } 82 83 if (opt_grand) { 84 grand_consume_nr = SAFE_STRTOL(cleanup, 85 grand_consume_str, 0, 86 LONG_MAX); 87 tst_resm(TINFO, "grandchild allocate %ldMB", 88 grand_consume_nr); 89 switch (pid = fork()) { 90 case -1: 91 tst_brkm(TBROK, cleanup, "fork"); 92 case 0: 93 consume(grand_consume_nr); 94 exit(0); 95 default: 96 break; 97 } 98 while (waitpid(-1, &pid, WUNTRACED | WCONTINUED) > 0) 99 if (WEXITSTATUS(pid) != 0) 100 tst_brkm(TBROK | TERRNO, cleanup, 101 "child exit status is not 0"); 102 } 103 104 if (opt_show) { 105 SAFE_GETRUSAGE(cleanup, RUSAGE_SELF, &ru); 106 maxrss_self = ru.ru_maxrss; 107 SAFE_GETRUSAGE(cleanup, RUSAGE_CHILDREN, &ru); 108 maxrss_children = ru.ru_maxrss; 109 tst_resm(TINFO, "exec.self = %ld, exec.children = %ld", 110 maxrss_self, maxrss_children); 111 if (opt_self) { 112 self_nr = SAFE_STRTOL(cleanup, 113 self_str, 0, LONG_MAX); 114 delta = maxrss_self - self_nr; 115 if (delta >= -DELTA_MAX && delta <= DELTA_MAX) 116 tst_resm(TPASS, 117 "initial.self ~= exec.self"); 118 else 119 tst_resm(TFAIL, 120 "initial.self !~= exec.self"); 121 } 122 if (opt_child) { 123 child_nr = SAFE_STRTOL(cleanup, 124 child_str, 0, LONG_MAX); 125 delta = maxrss_children - child_nr; 126 if (delta >= -DELTA_MAX && delta <= DELTA_MAX) 127 tst_resm(TPASS, 128 "initial.children ~= exec.children"); 129 else 130 tst_resm(TFAIL, 131 "initial.children !~= exec.children"); 132 } 133 } 134 } 135 136 cleanup(); 137 tst_exit(); 138 } 139 140 static void usage(void) 141 { 142 printf(" -n NUM consume NUM MB size\n"); 143 printf(" -g NUM grandchild consume NUM MB size\n"); 144 printf(" -v verbose mode, show rusage info\n"); 145 printf(" -s NUM compare rusage_self.maxrss with given NUM\n"); 146 printf(" -l NUM compare rusage_children.maxrss with given NUM\n"); 147 } 148 149 static void consume(int mega) 150 { 151 size_t sz; 152 void *ptr; 153 154 sz = mega * 1024 * 1024; 155 ptr = SAFE_MALLOC(cleanup, sz); 156 memset(ptr, 0, sz); 157 } 158 159 static void setup(void) 160 { 161 tst_sig(FORK, DEF_HANDLER, cleanup); 162 163 TEST_PAUSE; 164 } 165 166 static void cleanup(void) 167 { 168 } 169