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 #include <sys/types.h> 27 #include <string.h> 28 #include <stdio.h> 29 #include <stdlib.h> 30 #include <dlfcn.h> 31 #include <apptrace.h> 32 #include <assert.h> 33 #include "abienv.h" 34 35 #define NOTID 0xffffffff 36 37 /* 38 * This file is meant to contain support functions 39 * for interceptors. They are built into the auditing 40 * object making the namespace available to "children" 41 * objects. 42 */ 43 44 static lwp_mutex_t abi_stdio_mutex = DEFAULTMUTEX; 45 static volatile thread_t locktid = NOTID; 46 static volatile int count; 47 48 /* Return true on empty */ 49 int is_empty_string(char const * s)50is_empty_string(char const *s) 51 { 52 if (s != NULL && *s != '\0') 53 return (0); 54 55 return (1); 56 } 57 58 void abilock(sigset_t * mask)59abilock(sigset_t *mask) 60 { 61 thread_t tid; 62 63 if ((*abi_thr_main)() != -1) { 64 tid = (*abi_thr_self)(); 65 66 if (tid == locktid) { 67 count++; 68 } else { 69 (void) _lwp_mutex_lock(&abi_stdio_mutex); 70 (void) sigprocmask(SIG_BLOCK, &abisigset, mask); 71 locktid = tid; 72 count = 1; 73 } 74 } 75 } 76 77 void abiunlock(sigset_t * mask)78abiunlock(sigset_t *mask) 79 { 80 thread_t tid; 81 82 (void) fflush(ABISTREAM); 83 84 if ((*abi_thr_main)() != -1) { 85 tid = (*abi_thr_self)(); 86 assert(tid == locktid); 87 count--; 88 if (count <= 0) { 89 count = 0; 90 locktid = NOTID; 91 (void) sigprocmask(SIG_SETMASK, mask, NULL); 92 (void) _lwp_mutex_unlock(&abi_stdio_mutex); 93 } 94 } 95 } 96