mirror of
https://github.com/golang/go
synced 2024-11-14 21:10:29 -07:00
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.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// +build !windows,!android
|
|
|
|
// Test that the Go runtime still works if C code changes the signal stack.
|
|
|
|
package cgotest
|
|
|
|
/*
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
static stack_t oss;
|
|
static char signalStack[SIGSTKSZ];
|
|
|
|
static void changeSignalStack(void) {
|
|
stack_t ss;
|
|
memset(&ss, 0, sizeof ss);
|
|
ss.ss_sp = signalStack;
|
|
ss.ss_flags = 0;
|
|
ss.ss_size = SIGSTKSZ;
|
|
if (sigaltstack(&ss, &oss) < 0) {
|
|
perror("sigaltstack");
|
|
abort();
|
|
}
|
|
}
|
|
|
|
static void restoreSignalStack(void) {
|
|
#if (defined(__x86_64__) || defined(__i386__)) && defined(__APPLE__)
|
|
// The Darwin C library enforces a minimum that the kernel does not.
|
|
// This is OK since we allocated this much space in mpreinit,
|
|
// it was just removed from the buffer by stackalloc.
|
|
oss.ss_size = MINSIGSTKSZ;
|
|
#endif
|
|
if (sigaltstack(&oss, NULL) < 0) {
|
|
perror("sigaltstack restore");
|
|
abort();
|
|
}
|
|
}
|
|
|
|
static int zero(void) {
|
|
return 0;
|
|
}
|
|
*/
|
|
import "C"
|
|
|
|
import (
|
|
"runtime"
|
|
"testing"
|
|
)
|
|
|
|
func testSigaltstack(t *testing.T) {
|
|
switch {
|
|
case runtime.GOOS == "solaris", runtime.GOOS == "darwin" && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64"):
|
|
t.Skipf("switching signal stack not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
|
|
case runtime.GOOS == "darwin" && runtime.GOARCH == "386":
|
|
t.Skipf("sigaltstack fails on darwin/386")
|
|
}
|
|
|
|
C.changeSignalStack()
|
|
defer C.restoreSignalStack()
|
|
defer func() {
|
|
if recover() == nil {
|
|
t.Error("did not see expected panic")
|
|
}
|
|
}()
|
|
v := 1 / int(C.zero())
|
|
t.Errorf("unexpected success of division by zero == %d", v)
|
|
}
|