1 /* 2 * Copyright (c) 2005 David Xu <davidxu@freebsd.org> 3 * Copyright (C) 2003 Daniel M. Eischen <deischen@freebsd.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice unmodified, this list of conditions, and the following 11 * disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include <sys/types.h> 31 #include <sys/signalvar.h> 32 #include <pthread.h> 33 34 #include "thr_private.h" 35 36 /*#define DEBUG_THREAD_KERN */ 37 #ifdef DEBUG_THREAD_KERN 38 #define DBG_MSG stdout_debug 39 #else 40 #define DBG_MSG(x...) 41 #endif 42 43 /* 44 * This is called when the first thread (other than the initial 45 * thread) is created. 46 */ 47 int 48 _thr_setthreaded(int threaded) 49 { 50 if (((threaded == 0) ^ (__isthreaded == 0)) == 0) 51 return (0); 52 53 __isthreaded = threaded; 54 if (threaded != 0) { 55 _thr_rtld_init(); 56 } else { 57 _thr_rtld_fini(); 58 } 59 return (0); 60 } 61 62 void 63 _thr_signal_block(struct pthread *curthread) 64 { 65 sigset_t set; 66 67 if (curthread->sigblock > 0) { 68 curthread->sigblock++; 69 return; 70 } 71 SIGFILLSET(set); 72 SIGDELSET(set, SIGBUS); 73 SIGDELSET(set, SIGILL); 74 SIGDELSET(set, SIGFPE); 75 SIGDELSET(set, SIGSEGV); 76 SIGDELSET(set, SIGTRAP); 77 __sys_sigprocmask(SIG_BLOCK, &set, &curthread->sigmask); 78 curthread->sigblock++; 79 } 80 81 void 82 _thr_signal_unblock(struct pthread *curthread) 83 { 84 if (--curthread->sigblock == 0) 85 __sys_sigprocmask(SIG_SETMASK, &curthread->sigmask, NULL); 86 } 87 88 int 89 _thr_send_sig(struct pthread *thread, int sig) 90 { 91 return thr_kill(thread->tid, sig); 92 } 93 94 void 95 _thr_assert_lock_level() 96 { 97 PANIC("locklevel <= 0"); 98 } 99