mirror of
https://github.com/golang/go
synced 2024-11-07 20:36:14 -07:00
ad644d2e86
Change-Id: Iadb3c5de8ae9ea45855013997ed70f7929a88661
GitHub-Last-Rev: ae85bcf82b
GitHub-Pull-Request: golang/go#26920
Reviewed-on: https://go-review.googlesource.com/128955
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
59 lines
1.3 KiB
Go
59 lines
1.3 KiB
Go
// Copyright 2014 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.
|
|
|
|
// Test that SIGSETXID runs on signal stack, since it's likely to
|
|
// overflow if it runs on the Go stack.
|
|
|
|
package cgotest
|
|
|
|
/*
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
*/
|
|
import "C"
|
|
|
|
import (
|
|
"runtime"
|
|
"sync/atomic"
|
|
"testing"
|
|
|
|
"./issue9400"
|
|
)
|
|
|
|
func test9400(t *testing.T) {
|
|
// We synchronize through a shared variable, so we need two procs
|
|
defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(2))
|
|
|
|
// Start signaller
|
|
atomic.StoreInt32(&issue9400.Baton, 0)
|
|
go func() {
|
|
// Wait for RewindAndSetgid
|
|
for atomic.LoadInt32(&issue9400.Baton) == 0 {
|
|
runtime.Gosched()
|
|
}
|
|
// Broadcast SIGSETXID
|
|
runtime.LockOSThread()
|
|
C.setgid(0)
|
|
// Indicate that signalling is done
|
|
atomic.StoreInt32(&issue9400.Baton, 0)
|
|
}()
|
|
|
|
// Grow the stack and put down a test pattern
|
|
const pattern = 0x123456789abcdef
|
|
var big [1024]uint64 // len must match assembly
|
|
for i := range big {
|
|
big[i] = pattern
|
|
}
|
|
|
|
// Temporarily rewind the stack and trigger SIGSETXID
|
|
issue9400.RewindAndSetgid()
|
|
|
|
// Check test pattern
|
|
for i := range big {
|
|
if big[i] != pattern {
|
|
t.Fatalf("entry %d of test pattern is wrong; %#x != %#x", i, big[i], uint64(pattern))
|
|
}
|
|
}
|
|
}
|