1 /*
2 * Copyright (C) 2008 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 #include <errno.h>
30 #include <signal.h>
31
32 #include <platform/bionic/reserved_signals.h>
33
34 #include "private/SigSetConverter.h"
35
36 extern "C" int __rt_sigprocmask(int, const sigset64_t*, sigset64_t*, size_t);
37
38 //
39 // These need to be kept separate from pthread_sigmask, sigblock, sigsetmask,
40 // sighold, and sigset because libsigchain only intercepts sigprocmask so we
41 // can't allow clang to decide to inline sigprocmask.
42 //
43
sigprocmask(int how,const sigset_t * bionic_new_set,sigset_t * bionic_old_set)44 int sigprocmask(int how,
45 const sigset_t* bionic_new_set,
46 sigset_t* bionic_old_set) __attribute__((__noinline__)) {
47 SigSetConverter new_set;
48 sigset64_t* new_set_ptr = nullptr;
49 if (bionic_new_set != nullptr) {
50 sigemptyset64(&new_set.sigset64);
51 new_set.sigset = *bionic_new_set;
52 new_set_ptr = &new_set.sigset64;
53 }
54
55 SigSetConverter old_set;
56 if (sigprocmask64(how, new_set_ptr, &old_set.sigset64) == -1) {
57 return -1;
58 }
59
60 if (bionic_old_set != nullptr) {
61 *bionic_old_set = old_set.sigset;
62 }
63
64 return 0;
65 }
66
sigprocmask64(int how,const sigset64_t * new_set,sigset64_t * old_set)67 int sigprocmask64(int how,
68 const sigset64_t* new_set,
69 sigset64_t* old_set) __attribute__((__noinline__)) {
70 // how is only checked for validity if new_set is provided.
71 if (new_set && how != SIG_BLOCK && how != SIG_UNBLOCK && how != SIG_SETMASK) {
72 errno = EINVAL;
73 return -1;
74 }
75
76 sigset64_t mutable_new_set;
77 sigset64_t* mutable_new_set_ptr = nullptr;
78 if (new_set) {
79 mutable_new_set = filter_reserved_signals(*new_set, how);
80 mutable_new_set_ptr = &mutable_new_set;
81 }
82 return __rt_sigprocmask(how, mutable_new_set_ptr, old_set, sizeof(*new_set));
83 }
84