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ec654e2251
With GCC 7 (not yet released), cgo fails with errors like ./sigaltstack.go:65:8: call of non-function C.restoreSignalStack I do not know precisely why. Explicitly declaring that there are no arguments to the static function is a simple fix for the debug info. Change-Id: Id96e1cb1e55ee37a9f1f5ad243d7ee33e71584ac Reviewed-on: https://go-review.googlesource.com/35480 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
74 lines
1.7 KiB
Go
74 lines
1.7 KiB
Go
// 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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// +build !windows,!android
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// Test that the Go runtime still works if C code changes the signal stack.
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package cgotest
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/*
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static stack_t oss;
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static char signalStack[SIGSTKSZ];
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static void changeSignalStack(void) {
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stack_t ss;
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memset(&ss, 0, sizeof ss);
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ss.ss_sp = signalStack;
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ss.ss_flags = 0;
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ss.ss_size = SIGSTKSZ;
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if (sigaltstack(&ss, &oss) < 0) {
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perror("sigaltstack");
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abort();
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}
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}
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static void restoreSignalStack(void) {
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#if (defined(__x86_64__) || defined(__i386__)) && defined(__APPLE__)
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// The Darwin C library enforces a minimum that the kernel does not.
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// This is OK since we allocated this much space in mpreinit,
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// it was just removed from the buffer by stackalloc.
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oss.ss_size = MINSIGSTKSZ;
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#endif
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if (sigaltstack(&oss, NULL) < 0) {
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perror("sigaltstack restore");
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abort();
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}
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}
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static int zero(void) {
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return 0;
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}
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*/
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import "C"
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import (
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"runtime"
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"testing"
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)
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func testSigaltstack(t *testing.T) {
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switch {
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case runtime.GOOS == "solaris", runtime.GOOS == "darwin" && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64"):
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t.Skipf("switching signal stack not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
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case runtime.GOOS == "darwin" && runtime.GOARCH == "386":
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t.Skipf("sigaltstack fails on darwin/386")
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}
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C.changeSignalStack()
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defer C.restoreSignalStack()
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defer func() {
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if recover() == nil {
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t.Error("did not see expected panic")
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}
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}()
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v := 1 / int(C.zero())
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t.Errorf("unexpected success of division by zero == %d", v)
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}
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