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98f3d7fecb
CL 294430 made packages in std and cmd modules use Go 1.17 gofmt format, adding //go:build lines. This change applies the same formatting to some more packages that 'go fmt' missed (e.g., syscall/js, runtime/msan), and everything else that is easy and safe to modify in bulk. Consider the top-level test directory, testdata, and vendor directories out of scope, since there are many files that don't follow strict gofmt formatting, often for intentional and legitimate reasons (testing gofmt itself, invalid Go programs that shouldn't crash the compiler, etc.). That makes it easy and safe to gofmt -w the .go files that are found with gofmt -l with aforementioned directories filtered out: $ gofmt -l . 2>/dev/null | \ grep -v '^test/' | \ grep -v '/testdata/' | \ grep -v '/vendor/' | wc -l 51 None of the 51 files are generated. After this change, the same command prints 0. For #41184. Change-Id: Ia96ee2a0f998d6a167d4473bcad17ad09bc1d86e Reviewed-on: https://go-review.googlesource.com/c/go/+/341009 Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Trust: Dmitri Shuralyov <dmitshur@golang.org>
80 lines
1.8 KiB
Go
80 lines
1.8 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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//go:build !windows && !android
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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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#ifdef _AIX
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// On AIX, SIGSTKSZ is too small to handle Go sighandler.
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#define CSIGSTKSZ 0x4000
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#else
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#define CSIGSTKSZ SIGSTKSZ
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#endif
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static stack_t oss;
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static char signalStack[CSIGSTKSZ];
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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 = CSIGSTKSZ;
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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 == "illumos", runtime.GOOS == "ios" && 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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}
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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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