1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <sys/types.h> 29 #include <string.h> 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <dlfcn.h> 33 #include <apptrace.h> 34 #include <assert.h> 35 #include "abienv.h" 36 37 #define NOTID 0xffffffff 38 39 /* 40 * This file is meant to contain support functions 41 * for interceptors. They are built into the auditing 42 * object making the namespace available to "children" 43 * objects. 44 */ 45 46 static lwp_mutex_t abi_stdio_mutex = DEFAULTMUTEX; 47 static volatile thread_t locktid = NOTID; 48 static volatile int count; 49 50 /* Return true on empty */ 51 int 52 is_empty_string(char const *s) 53 { 54 if (s != NULL && *s != '\0') 55 return (0); 56 57 return (1); 58 } 59 60 void 61 abilock(sigset_t *mask) 62 { 63 thread_t tid; 64 65 if ((*abi_thr_main)() != -1) { 66 tid = (*abi_thr_self)(); 67 68 if (tid == locktid) { 69 count++; 70 } else { 71 (void) _lwp_mutex_lock(&abi_stdio_mutex); 72 (void) sigprocmask(SIG_BLOCK, &abisigset, mask); 73 locktid = tid; 74 count = 1; 75 } 76 } 77 } 78 79 void 80 abiunlock(sigset_t *mask) 81 { 82 thread_t tid; 83 84 (void) fflush(ABISTREAM); 85 86 if ((*abi_thr_main)() != -1) { 87 tid = (*abi_thr_self)(); 88 assert(tid == locktid); 89 count--; 90 if (count <= 0) { 91 count = 0; 92 locktid = NOTID; 93 (void) sigprocmask(SIG_SETMASK, mask, NULL); 94 (void) _lwp_mutex_unlock(&abi_stdio_mutex); 95 } 96 } 97 } 98