1 // Copyright 2015 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
4
5 // Test for verifying that the Go runtime properly forwards
6 // signals when non-Go signals are raised.
7
8 #include <stdio.h>
9 #include <stdlib.h>
10 #include <unistd.h>
11 #include <sys/types.h>
12 #include <sys/time.h>
13 #include <sys/select.h>
14
15 #include "libgo2.h"
16
17 int *nilp;
18
19 int main(int argc, char** argv) {
20 int verbose;
21 int test;
22
23 if (argc < 2) {
24 printf("Missing argument\n");
25 return 1;
26 }
27
28 test = atoi(argv[1]);
29
30 verbose = (argc > 2);
31
32 if (verbose) {
33 printf("calling RunGoroutines\n");
34 }
35
36 Noop();
37
38 switch (test) {
39 case 1: {
40 if (verbose) {
41 printf("attempting segfault\n");
42 }
43
44 *nilp = 0;
45 break;
46 }
47
48 case 2: {
49 struct timeval tv;
50
51 if (verbose) {
52 printf("attempting external signal test\n");
53 }
54
55 fprintf(stderr, "OK\n");
56 fflush(stderr);
57
58 // The program should be interrupted before
59 // this sleep finishes. We use select rather
60 // than sleep because in older versions of
61 // glibc the sleep function does some signal
62 // fiddling to handle SIGCHLD. If this
63 // program is fiddling signals just when the
64 // test program sends the signal, the signal
65 // may be delivered to a Go thread which will
66 // break this test.
67 tv.tv_sec = 60;
68 tv.tv_usec = 0;
69 select(0, NULL, NULL, NULL, &tv);
70
71 break;
72 }
73 case 3: {
74 if (verbose) {
75 printf("attempting SIGPIPE\n");
76 }
77
78 int fd[2];
79 if (pipe(fd) != 0) {
80 printf("pipe(2) failed\n");
81 return 0;
82 }
83 // Close the reading end.
84 close(fd[0]);
85 // Expect that write(2) fails (EPIPE)
86 if (write(fd[1], "some data", 9) != -1) {
87 printf("write(2) unexpectedly succeeded\n");
88 return 0;
89 }
90 printf("did not receive SIGPIPE\n");
91 return 0;
92 }
93 default:
94 printf("Unknown test: %d\n", test);
95 return 0;
96 }
97
98 printf("FAIL\n");
99 return 0;
100 }
101
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