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 main(int argc, char** argv) { 18 int verbose; 19 int test; 20 21 if (argc < 2) { 22 printf("Missing argument\n"); 23 return 1; 24 } 25 26 test = atoi(argv[1]); 27 28 verbose = (argc > 2); 29 30 if (verbose) { 31 printf("calling RunGoroutines\n"); 32 } 33 34 Noop(); 35 36 switch (test) { 37 case 1: { 38 if (verbose) { 39 printf("attempting segfault\n"); 40 } 41 42 volatile int crash = *(int *) 0; 43 break; 44 } 45 46 case 2: { 47 struct timeval tv; 48 49 if (verbose) { 50 printf("attempting external signal test\n"); 51 } 52 53 fprintf(stderr, "OK\n"); 54 fflush(stderr); 55 56 // The program should be interrupted before 57 // this sleep finishes. We use select rather 58 // than sleep because in older versions of 59 // glibc the sleep function does some signal 60 // fiddling to handle SIGCHLD. If this 61 // program is fiddling signals just when the 62 // test program sends the signal, the signal 63 // may be delivered to a Go thread which will 64 // break this test. 65 tv.tv_sec = 60; 66 tv.tv_usec = 0; 67 select(0, NULL, NULL, NULL, &tv); 68 69 break; 70 } 71 case 3: { 72 if (verbose) { 73 printf("attempting SIGPIPE\n"); 74 } 75 76 int fd[2]; 77 if (pipe(fd) != 0) { 78 printf("pipe(2) failed\n"); 79 return 0; 80 } 81 // Close the reading end. 82 close(fd[0]); 83 // Expect that write(2) fails (EPIPE) 84 if (write(fd[1], "some data", 9) != -1) { 85 printf("write(2) unexpectedly succeeded\n"); 86 return 0; 87 } 88 } 89 default: 90 printf("Unknown test: %d\n", test); 91 return 0; 92 } 93 94 printf("FAIL\n"); 95 return 0; 96 } 97
