1 // RUN: %clangxx -std=c++11 -O0 -g %s -o %t && %run %t
2
3 #include <assert.h>
4 #include <signal.h>
5 #include <unistd.h>
6
7 static bool sahandler_done;
8 static bool sasigaction_done;
9
sahandler(int)10 static void sahandler(int) { sahandler_done = true; }
11
sasigaction(int,siginfo_t *,void *)12 static void sasigaction(int, siginfo_t *, void *) { sasigaction_done = true; }
13
install(T * handler,struct sigaction * prev)14 template <typename T> void install(T *handler, struct sigaction *prev) {
15 bool siginfo = handler == (T *)&sasigaction;
16 struct sigaction act = {};
17 if (siginfo) {
18 act.sa_flags = SA_SIGINFO;
19 act.sa_sigaction = (decltype(act.sa_sigaction))handler;
20 } else {
21 act.sa_handler = (decltype(act.sa_handler))handler;
22 }
23 int ret = sigaction(SIGHUP, &act, prev);
24 assert(ret == 0);
25
26 if (handler == (T *)&sahandler) {
27 sahandler_done = false;
28 raise(SIGHUP);
29 assert(sahandler_done);
30 }
31
32 if (handler == (T *)&sasigaction) {
33 sasigaction_done = false;
34 raise(SIGHUP);
35 assert(sasigaction_done);
36 }
37 }
38
test(T1 * from,T2 * to)39 template <typename T1, typename T2> void test(T1 *from, T2 *to) {
40 install(from, nullptr);
41 struct sigaction prev = {};
42 install(to, &prev);
43
44 bool siginfo_from = (from == (T1 *)&sasigaction);
45 if (siginfo_from) {
46 assert(prev.sa_flags & SA_SIGINFO);
47 assert(prev.sa_sigaction == (decltype(prev.sa_sigaction))from);
48 } else {
49 assert((prev.sa_flags & SA_SIGINFO) == 0);
50 assert(prev.sa_handler == (decltype(prev.sa_handler))from);
51 }
52 }
53
testAll(T * to)54 template <typename T> void testAll(T *to) {
55 test(&sahandler, to);
56 test(&sasigaction, to);
57 test(SIG_IGN, to);
58 test(SIG_DFL, to);
59 }
60
main(void)61 int main(void) {
62 testAll(&sahandler);
63 testAll(&sasigaction);
64 testAll(SIG_IGN);
65 testAll(SIG_DFL);
66 }
67