1 /* 2 * Copyright (C) 2018 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 29 #pragma once 30 31 #include <sys/cdefs.h> 32 33 #include <signal.h> 34 35 #include "bionic_macros.h" 36 37 // Realtime signals reserved for internal use: 38 // 32 (__SIGRTMIN + 0) POSIX timers 39 // 33 (__SIGRTMIN + 1) libbacktrace 40 // 34 (__SIGRTMIN + 2) libcore 41 // 35 (__SIGRTMIN + 3) debuggerd -b 42 // 36 (__SIGRTMIN + 4) heapprofd 43 // 37 (__SIGRTMIN + 5) coverage (libprofile-extras) 44 // 45 // If you change this, also change __ndk_legacy___libc_current_sigrtmin 46 // in <android/legacy_signal_inlines.h> to match. 47 48 #define __SIGRT_RESERVED 6 49 static inline __always_inline sigset64_t filter_reserved_signals(sigset64_t sigset, int how) { 50 int (*block)(sigset64_t*, int); 51 int (*unblock)(sigset64_t*, int); 52 switch (how) { 53 case SIG_BLOCK: 54 __BIONIC_FALLTHROUGH; 55 case SIG_SETMASK: 56 block = sigaddset64; 57 unblock = sigdelset64; 58 break; 59 60 case SIG_UNBLOCK: 61 block = sigdelset64; 62 unblock = sigaddset64; 63 break; 64 } 65 66 // The POSIX timer signal must be blocked. 67 block(&sigset, __SIGRTMIN + 0); 68 69 // Everything else must remain unblocked. 70 unblock(&sigset, __SIGRTMIN + 1); 71 unblock(&sigset, __SIGRTMIN + 2); 72 unblock(&sigset, __SIGRTMIN + 3); 73 unblock(&sigset, __SIGRTMIN + 4); 74 unblock(&sigset, __SIGRTMIN + 5); 75 return sigset; 76 } 77
