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// Copyright 2012 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 cgo
package runtime_test
import (
"os/exec"
"runtime"
"strings"
"testing"
)
func TestCgoCrashHandler(t *testing.T) {
testCrashHandler(t, true)
}
func TestCgoSignalDeadlock(t *testing.T) {
if testing.Short() && runtime.GOOS == "windows" {
t.Skip("Skipping in short mode") // takes up to 64 seconds
}
got := executeTest(t, cgoSignalDeadlockSource, nil)
want := "OK\n"
if got != want {
t.Fatalf("expected %q, but got %q", want, got)
}
}
func TestCgoTraceback(t *testing.T) {
got := executeTest(t, cgoTracebackSource, nil)
want := "OK\n"
if got != want {
t.Fatalf("expected %q, but got %q", want, got)
}
}
func TestCgoExternalThreadPanic(t *testing.T) {
if runtime.GOOS == "plan9" {
t.Skipf("no pthreads on %s", runtime.GOOS)
}
csrc := cgoExternalThreadPanicC
if runtime.GOOS == "windows" {
csrc = cgoExternalThreadPanicC_windows
}
got := executeTest(t, cgoExternalThreadPanicSource, nil, "main.c", csrc)
want := "panic: BOOM"
if !strings.Contains(got, want) {
t.Fatalf("want failure containing %q. output:\n%s\n", want, got)
}
}
func TestCgoExternalThreadSIGPROF(t *testing.T) {
// issue 9456.
switch runtime.GOOS {
case "plan9", "windows":
t.Skipf("no pthreads on %s", runtime.GOOS)
case "darwin":
// static constructor needs external linking, but we don't support
// external linking on OS X 10.6.
out, err := exec.Command("uname", "-r").Output()
if err != nil {
t.Fatalf("uname -r failed: %v", err)
}
// OS X 10.6 == Darwin 10.x
if strings.HasPrefix(string(out), "10.") {
t.Skipf("no external linking on OS X 10.6")
}
}
got := executeTest(t, cgoExternalThreadSIGPROFSource, nil)
want := "OK\n"
if got != want {
t.Fatalf("expected %q, but got %q", want, got)
}
}
const cgoSignalDeadlockSource = `
package main
import "C"
import (
"fmt"
"runtime"
"time"
)
func main() {
runtime.GOMAXPROCS(100)
ping := make(chan bool)
go func() {
for i := 0; ; i++ {
runtime.Gosched()
select {
case done := <-ping:
if done {
ping <- true
return
}
ping <- true
default:
}
func() {
defer func() {
recover()
}()
var s *string
*s = ""
}()
}
}()
time.Sleep(time.Millisecond)
for i := 0; i < 64; i++ {
go func() {
runtime.LockOSThread()
select {}
}()
go func() {
runtime.LockOSThread()
select {}
}()
time.Sleep(time.Millisecond)
ping <- false
select {
case <-ping:
case <-time.After(time.Second):
fmt.Printf("HANG\n")
return
}
}
ping <- true
select {
case <-ping:
case <-time.After(time.Second):
fmt.Printf("HANG\n")
return
}
fmt.Printf("OK\n")
}
`
const cgoTracebackSource = `
package main
/* void foo(void) {} */
import "C"
import (
"fmt"
"runtime"
)
func main() {
C.foo()
buf := make([]byte, 1)
runtime.Stack(buf, true)
fmt.Printf("OK\n")
}
`
const cgoExternalThreadPanicSource = `
package main
// void start(void);
import "C"
func main() {
C.start()
select {}
}
//export gopanic
func gopanic() {
panic("BOOM")
}
`
const cgoExternalThreadPanicC = `
#include <stdlib.h>
#include <stdio.h>
#include <pthread.h>
void gopanic(void);
static void*
die(void* x)
{
gopanic();
return 0;
}
void
start(void)
{
pthread_t t;
if(pthread_create(&t, 0, die, 0) != 0)
printf("pthread_create failed\n");
}
`
const cgoExternalThreadPanicC_windows = `
#include <stdlib.h>
#include <stdio.h>
void gopanic(void);
static void*
die(void* x)
{
gopanic();
return 0;
}
void
start(void)
{
if(_beginthreadex(0, 0, die, 0, 0, 0) != 0)
printf("_beginthreadex failed\n");
}
`
const cgoExternalThreadSIGPROFSource = `
package main
/*
#include <stdint.h>
#include <signal.h>
#include <pthread.h>
volatile int32_t spinlock;
static void *thread1(void *p) {
(void)p;
while (spinlock == 0)
;
pthread_kill(pthread_self(), SIGPROF);
spinlock = 0;
return NULL;
}
__attribute__((constructor)) void issue9456() {
pthread_t tid;
pthread_create(&tid, 0, thread1, NULL);
}
*/
import "C"
import (
"runtime"
"sync/atomic"
"unsafe"
)
func main() {
// This test intends to test that sending SIGPROF to foreign threads
// before we make any cgo call will not abort the whole process, so
// we cannot make any cgo call here. See http://golang.org/issue/9456.
atomic.StoreInt32((*int32)(unsafe.Pointer(&C.spinlock)), 1)
for atomic.LoadInt32((*int32)(unsafe.Pointer(&C.spinlock))) == 1 {
runtime.Gosched()
}
println("OK")
}
`
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