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comparison libgo/misc/cgo/test/sigaltstack.go @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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children 1830386684a0
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68:561a7518be6b 111:04ced10e8804
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 // +build !windows,!android
6
7 // Test that the Go runtime still works if C code changes the signal stack.
8
9 package cgotest
10
11 /*
12 #include <signal.h>
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <string.h>
16
17 static stack_t oss;
18 static char signalStack[SIGSTKSZ];
19
20 static void changeSignalStack(void) {
21 stack_t ss;
22 memset(&ss, 0, sizeof ss);
23 ss.ss_sp = signalStack;
24 ss.ss_flags = 0;
25 ss.ss_size = SIGSTKSZ;
26 if (sigaltstack(&ss, &oss) < 0) {
27 perror("sigaltstack");
28 abort();
29 }
30 }
31
32 static void restoreSignalStack(void) {
33 #if (defined(__x86_64__) || defined(__i386__)) && defined(__APPLE__)
34 // The Darwin C library enforces a minimum that the kernel does not.
35 // This is OK since we allocated this much space in mpreinit,
36 // it was just removed from the buffer by stackalloc.
37 oss.ss_size = MINSIGSTKSZ;
38 #endif
39 if (sigaltstack(&oss, NULL) < 0) {
40 perror("sigaltstack restore");
41 abort();
42 }
43 }
44
45 static int zero(void) {
46 return 0;
47 }
48 */
49 import "C"
50
51 import (
52 "runtime"
53 "testing"
54 )
55
56 func testSigaltstack(t *testing.T) {
57 switch {
58 case runtime.GOOS == "solaris", runtime.GOOS == "darwin" && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64"):
59 t.Skipf("switching signal stack not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
60 case runtime.GOOS == "darwin" && runtime.GOARCH == "386":
61 t.Skipf("sigaltstack fails on darwin/386")
62 }
63
64 C.changeSignalStack()
65 defer C.restoreSignalStack()
66 defer func() {
67 if recover() == nil {
68 t.Error("did not see expected panic")
69 }
70 }()
71 v := 1 / int(C.zero())
72 t.Errorf("unexpected success of division by zero == %d", v)
73 }