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
main(int argc,char ** argv)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 Noop();
33
34 switch (test) {
35 case 1: {
36 if (verbose) {
37 printf("attempting segfault\n");
38 }
39
40 *nilp = 0;
41 break;
42 }
43
44 case 2: {
45 struct timeval tv;
46
47 if (verbose) {
48 printf("attempting external signal test\n");
49 }
50
51 fprintf(stderr, "OK\n");
52 fflush(stderr);
53
54 // The program should be interrupted before
55 // this sleep finishes. We use select rather
56 // than sleep because in older versions of
57 // glibc the sleep function does some signal
58 // fiddling to handle SIGCHLD. If this
59 // program is fiddling signals just when the
60 // test program sends the signal, the signal
61 // may be delivered to a Go thread which will
62 // break this test.
63 tv.tv_sec = 60;
64 tv.tv_usec = 0;
65 select(0, NULL, NULL, NULL, &tv);
66
67 break;
68 }
69 case 3: {
70 if (verbose) {
71 printf("attempting SIGPIPE\n");
72 }
73
74 int fd[2];
75 if (pipe(fd) != 0) {
76 printf("pipe(2) failed\n");
77 return 0;
78 }
79 // Close the reading end.
80 close(fd[0]);
81 // Expect that write(2) fails (EPIPE)
82 if (write(fd[1], "some data", 9) != -1) {
83 printf("write(2) unexpectedly succeeded\n");
84 return 0;
85 }
86 printf("did not receive SIGPIPE\n");
87 return 0;
88 }
89 case 4: {
90 fprintf(stderr, "OK\n");
91 fflush(stderr);
92
93 if (verbose) {
94 printf("calling Block\n");
95 }
96 Block();
97 }
98 default:
99 printf("Unknown test: %d\n", test);
100 return 0;
101 }
102
103 printf("FAIL\n");
104 return 0;
105 }
106