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https://github.com/golang/go
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78074f6850
Before this CL, Go programs in c-archive or c-shared buildmodes would not handle SIGPIPE. That leads to surprising behaviour where writes on a closed pipe or socket would raise SIGPIPE and terminate the program. This CL changes the Go runtime to handle SIGPIPE regardless of buildmode. In addition, SIGPIPE from non-Go code is forwarded. This is a refinement of CL 32796 that fixes the case where a non-default handler for SIGPIPE is installed by the host C program. Fixes #17393 Change-Id: Ia41186e52c1ac209d0a594bae9904166ae7df7de Reviewed-on: https://go-review.googlesource.com/35960 Run-TryBot: Elias Naur <elias.naur@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
97 lines
1.9 KiB
C
97 lines
1.9 KiB
C
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test for verifying that the Go runtime properly forwards
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// signals when non-Go signals are raised.
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/select.h>
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#include "libgo2.h"
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int main(int argc, char** argv) {
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int verbose;
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int test;
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if (argc < 2) {
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printf("Missing argument\n");
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return 1;
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}
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test = atoi(argv[1]);
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verbose = (argc > 2);
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if (verbose) {
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printf("calling RunGoroutines\n");
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}
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Noop();
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switch (test) {
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case 1: {
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if (verbose) {
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printf("attempting segfault\n");
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}
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volatile int crash = *(int *) 0;
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break;
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}
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case 2: {
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struct timeval tv;
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if (verbose) {
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printf("attempting external signal test\n");
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}
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fprintf(stderr, "OK\n");
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fflush(stderr);
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// The program should be interrupted before
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// this sleep finishes. We use select rather
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// than sleep because in older versions of
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// glibc the sleep function does some signal
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// fiddling to handle SIGCHLD. If this
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// program is fiddling signals just when the
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// test program sends the signal, the signal
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// may be delivered to a Go thread which will
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// break this test.
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tv.tv_sec = 60;
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tv.tv_usec = 0;
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select(0, NULL, NULL, NULL, &tv);
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break;
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}
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case 3: {
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if (verbose) {
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printf("attempting SIGPIPE\n");
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}
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int fd[2];
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if (pipe(fd) != 0) {
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printf("pipe(2) failed\n");
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return 0;
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}
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// Close the reading end.
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close(fd[0]);
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// Expect that write(2) fails (EPIPE)
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if (write(fd[1], "some data", 9) != -1) {
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printf("write(2) unexpectedly succeeded\n");
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return 0;
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}
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}
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default:
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printf("Unknown test: %d\n", test);
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return 0;
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}
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printf("FAIL\n");
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return 0;
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}
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