1 //
2 // Automated Testing Framework (atf)
3 //
4 // Copyright (c) 2010 The NetBSD Foundation, Inc.
5 // All rights reserved.
6 //
7 // Redistribution and use in source and binary forms, with or without
8 // modification, are permitted provided that the following conditions
9 // are met:
10 // 1. Redistributions of source code must retain the above copyright
11 // notice, this list of conditions and the following 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 NETBSD FOUNDATION, INC. AND
17 // CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
18 // INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 // IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
21 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
23 // GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 // IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 // IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 //
29
30 extern "C" {
31 #include <sys/time.h>
32 }
33
34 #include <cassert>
35 #include <cerrno>
36 #include <csignal>
37 #include <ctime>
38
39 #include "exceptions.hpp"
40 #include "signals.hpp"
41 #include "timers.hpp"
42
43 namespace impl = tools::timers;
44 #define IMPL_NAME "tools::timers"
45
46 // ------------------------------------------------------------------------
47 // Auxiliary functions.
48 // ------------------------------------------------------------------------
49
50 static
51 void
handler(const int signo,siginfo_t * si,void * uc)52 handler(const int signo __attribute__((__unused__)), siginfo_t* si,
53 void* uc __attribute__((__unused__)))
54 {
55 impl::timer* timer = static_cast< impl::timer* >(si->si_value.sival_ptr);
56 timer->set_fired();
57 timer->timeout_callback();
58 }
59
60 // ------------------------------------------------------------------------
61 // The "timer" class.
62 // ------------------------------------------------------------------------
63
64 struct impl::timer::impl {
65 ::timer_t m_timer;
66 ::itimerspec m_old_it;
67
68 struct ::sigaction m_old_sa;
69 volatile bool m_fired;
70
implimpl::timer::impl71 impl(void) : m_fired(false)
72 {
73 }
74 };
75
timer(const unsigned int seconds)76 impl::timer::timer(const unsigned int seconds) :
77 m_pimpl(new impl())
78 {
79 struct ::sigaction sa;
80 sigemptyset(&sa.sa_mask);
81 sa.sa_flags = SA_SIGINFO;
82 sa.sa_sigaction = ::handler;
83 if (::sigaction(SIGALRM, &sa, &m_pimpl->m_old_sa) == -1)
84 throw tools::system_error(IMPL_NAME "::timer::timer",
85 "Failed to set signal handler", errno);
86
87 struct ::sigevent se;
88 se.sigev_notify = SIGEV_SIGNAL;
89 se.sigev_signo = SIGALRM;
90 se.sigev_value.sival_ptr = static_cast< void* >(this);
91 se.sigev_notify_function = NULL;
92 se.sigev_notify_attributes = NULL;
93 if (::timer_create(CLOCK_MONOTONIC, &se, &m_pimpl->m_timer) == -1) {
94 ::sigaction(SIGALRM, &m_pimpl->m_old_sa, NULL);
95 throw tools::system_error(IMPL_NAME "::timer::timer",
96 "Failed to create timer", errno);
97 }
98
99 struct ::itimerspec it;
100 it.it_interval.tv_sec = 0;
101 it.it_interval.tv_nsec = 0;
102 it.it_value.tv_sec = seconds;
103 it.it_value.tv_nsec = 0;
104 if (::timer_settime(m_pimpl->m_timer, 0, &it, &m_pimpl->m_old_it) == -1) {
105 ::sigaction(SIGALRM, &m_pimpl->m_old_sa, NULL);
106 ::timer_delete(m_pimpl->m_timer);
107 throw tools::system_error(IMPL_NAME "::timer::timer",
108 "Failed to program timer", errno);
109 }
110 }
111
~timer(void)112 impl::timer::~timer(void)
113 {
114 int ret;
115
116 ret = ::timer_delete(m_pimpl->m_timer);
117 assert(ret != -1);
118
119 ret = ::sigaction(SIGALRM, &m_pimpl->m_old_sa, NULL);
120 assert(ret != -1);
121 }
122
123 bool
fired(void) const124 impl::timer::fired(void)
125 const
126 {
127 return m_pimpl->m_fired;
128 }
129
130 void
set_fired(void)131 impl::timer::set_fired(void)
132 {
133 m_pimpl->m_fired = true;
134 }
135
136 // ------------------------------------------------------------------------
137 // The "child_timer" class.
138 // ------------------------------------------------------------------------
139
child_timer(const unsigned int seconds,const pid_t pid,volatile bool & terminate)140 impl::child_timer::child_timer(const unsigned int seconds, const pid_t pid,
141 volatile bool& terminate) :
142 timer(seconds),
143 m_pid(pid),
144 m_terminate(terminate)
145 {
146 }
147
~child_timer(void)148 impl::child_timer::~child_timer(void)
149 {
150 }
151
152 void
timeout_callback(void)153 impl::child_timer::timeout_callback(void)
154 {
155 static const timespec ts = { 1, 0 };
156 m_terminate = true;
157 ::kill(-m_pid, SIGTERM);
158 ::nanosleep(&ts, NULL);
159 if (::kill(-m_pid, 0) != -1)
160 ::kill(-m_pid, SIGKILL);
161 }
162