1/* 2 * Copyright (c) 2011 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29/* Toy filtering. Allow system-wide or filtering on 4 PIDs */ 30 31#include <mach/mach_types.h> 32#include <sys/types.h> /* NULL */ 33// #include <libkern/libkern.h> 34 35#include <kperf/context.h> 36#include <kperf/filter.h> 37 38// Filter params... dodge for now 39#define NPIDS (4) 40int pid_list[NPIDS]; 41 42// function to determine whether we should take a sample 43int 44kperf_filter_should_sample(struct kperf_context *context) 45{ 46 int i, restricted = 0; 47 48 /* see if the pids are restricted */ 49 for( i = 0; i < NPIDS; i++ ) 50 { 51 if( context->cur_pid == pid_list[i] ) 52 return 1; 53 54 if( pid_list[i] != -1 ) 55 restricted = 1; 56 } 57 58 /* wasn't in the pid list, but something was */ 59 if( restricted ) 60 return 0; 61 62 /* not fitered, sample it */ 63 return 1; 64} 65 66/* check whether pid filtering is enabled */ 67int 68kperf_filter_on_pid(void) 69{ 70 int i; 71 72 for( i = 0; i < NPIDS; i++ ) 73 if( pid_list[i] != -1 ) 74 return 1; 75 76 return 0; 77} 78 79/* create a list of pids to filter */ 80void 81kperf_filter_pid_list( int *outcount, int **outv ) 82{ 83 int i, found = 0; 84 85 for( i = 0; i < NPIDS; i++ ) 86 if( pid_list[i] != -1 ) 87 found = 1; 88 89 if( !found ) 90 { 91 *outcount = 0; 92 *outv = NULL; 93 return; 94 } 95 96 /* just return our list */ 97 *outcount = NPIDS; 98 *outv = pid_list; 99} 100 101/* free a list we created*/ 102void 103kperf_filter_free_pid_list( int *incount, int **inv ) 104{ 105 // no op 106 (void) incount; 107 (void) inv; 108} 109 110/* init the filters to nothing */ 111void 112kperf_filter_init(void) 113{ 114 int i; 115 for( i = 0; i < NPIDS; i++ ) 116 pid_list[i] = -1; 117} 118