1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 #include <unistd.h> 29 #include "pthread_internal.h" 30 #include "cpuacct.h" 31 32 extern int __fork(void); 33 34 int fork(void) 35 { 36 int ret; 37 38 /* Posix mandates that the timers of a fork child process be 39 * disarmed, but not destroyed. To avoid a race condition, we're 40 * going to stop all timers now, and only re-start them in case 41 * of error, or in the parent process 42 */ 43 __timer_table_start_stop(1); 44 ret = __fork(); 45 if (ret != 0) { /* not a child process */ 46 __timer_table_start_stop(0); 47 } else { 48 /* 49 * Newly created process must update cpu accounting. 50 * Call cpuacct_add passing in our uid, which will take 51 * the current task id and add it to the uid group passed 52 * as a parameter. 53 */ 54 cpuacct_add(getuid()); 55 } 56 return ret; 57 } 58
