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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Test for verifying that the Go runtime properly forwards
// signals when non-Go signals are raised.
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/select.h>
#include "libgo2.h"
int *nilp;
int main(int argc, char** argv) {
int verbose;
int test;
if (argc < 2) {
printf("Missing argument\n");
return 1;
}
test = atoi(argv[1]);
verbose = (argc > 2);
Noop();
switch (test) {
case 1: {
if (verbose) {
printf("attempting segfault\n");
}
*nilp = 0;
break;
}
case 2: {
struct timeval tv;
if (verbose) {
printf("attempting external signal test\n");
}
fprintf(stderr, "OK\n");
fflush(stderr);
// The program should be interrupted before
// this sleep finishes. We use select rather
// than sleep because in older versions of
// glibc the sleep function does some signal
// fiddling to handle SIGCHLD. If this
// program is fiddling signals just when the
// test program sends the signal, the signal
// may be delivered to a Go thread which will
// break this test.
tv.tv_sec = 60;
tv.tv_usec = 0;
select(0, NULL, NULL, NULL, &tv);
break;
}
case 3: {
if (verbose) {
printf("attempting SIGPIPE\n");
}
int fd[2];
if (pipe(fd) != 0) {
printf("pipe(2) failed\n");
return 0;
}
// Close the reading end.
close(fd[0]);
// Expect that write(2) fails (EPIPE)
if (write(fd[1], "some data", 9) != -1) {
printf("write(2) unexpectedly succeeded\n");
return 0;
}
printf("did not receive SIGPIPE\n");
return 0;
}
case 4: {
fprintf(stderr, "OK\n");
fflush(stderr);
if (verbose) {
printf("calling Block\n");
}
Block();
}
default:
printf("Unknown test: %d\n", test);
return 0;
}
printf("FAIL\n");
return 0;
}