mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-04 13:06:01 +00:00
334 lines
7.4 KiB
Go
334 lines
7.4 KiB
Go
// 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.
|
|
|
|
package runtime_test
|
|
|
|
import (
|
|
"io"
|
|
. "runtime"
|
|
"runtime/debug"
|
|
"testing"
|
|
"unsafe"
|
|
)
|
|
|
|
func init() {
|
|
// We're testing the runtime, so make tracebacks show things
|
|
// in the runtime. This only raises the level, so it won't
|
|
// override GOTRACEBACK=crash from the user.
|
|
SetTracebackEnv("system")
|
|
}
|
|
|
|
var errf error
|
|
|
|
func errfn() error {
|
|
return errf
|
|
}
|
|
|
|
func errfn1() error {
|
|
return io.EOF
|
|
}
|
|
|
|
func BenchmarkIfaceCmp100(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
for j := 0; j < 100; j++ {
|
|
if errfn() == io.EOF {
|
|
b.Fatal("bad comparison")
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkIfaceCmpNil100(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
for j := 0; j < 100; j++ {
|
|
if errfn1() == nil {
|
|
b.Fatal("bad comparison")
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkDefer(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
defer1()
|
|
}
|
|
}
|
|
|
|
func defer1() {
|
|
defer func(x, y, z int) {
|
|
if recover() != nil || x != 1 || y != 2 || z != 3 {
|
|
panic("bad recover")
|
|
}
|
|
}(1, 2, 3)
|
|
return
|
|
}
|
|
|
|
func BenchmarkDefer10(b *testing.B) {
|
|
for i := 0; i < b.N/10; i++ {
|
|
defer2()
|
|
}
|
|
}
|
|
|
|
func defer2() {
|
|
for i := 0; i < 10; i++ {
|
|
defer func(x, y, z int) {
|
|
if recover() != nil || x != 1 || y != 2 || z != 3 {
|
|
panic("bad recover")
|
|
}
|
|
}(1, 2, 3)
|
|
}
|
|
}
|
|
|
|
func BenchmarkDeferMany(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
defer func(x, y, z int) {
|
|
if recover() != nil || x != 1 || y != 2 || z != 3 {
|
|
panic("bad recover")
|
|
}
|
|
}(1, 2, 3)
|
|
}
|
|
}
|
|
|
|
// golang.org/issue/7063
|
|
func TestStopCPUProfilingWithProfilerOff(t *testing.T) {
|
|
SetCPUProfileRate(0)
|
|
}
|
|
|
|
// Addresses to test for faulting behavior.
|
|
// This is less a test of SetPanicOnFault and more a check that
|
|
// the operating system and the runtime can process these faults
|
|
// correctly. That is, we're indirectly testing that without SetPanicOnFault
|
|
// these would manage to turn into ordinary crashes.
|
|
// Note that these are truncated on 32-bit systems, so the bottom 32 bits
|
|
// of the larger addresses must themselves be invalid addresses.
|
|
// We might get unlucky and the OS might have mapped one of these
|
|
// addresses, but probably not: they're all in the first page, very high
|
|
// adderesses that normally an OS would reserve for itself, or malformed
|
|
// addresses. Even so, we might have to remove one or two on different
|
|
// systems. We will see.
|
|
|
|
var faultAddrs = []uint64{
|
|
// low addresses
|
|
0,
|
|
1,
|
|
0xfff,
|
|
// high (kernel) addresses
|
|
// or else malformed.
|
|
0xffffffffffffffff,
|
|
0xfffffffffffff001,
|
|
0xffffffffffff0001,
|
|
0xfffffffffff00001,
|
|
0xffffffffff000001,
|
|
0xfffffffff0000001,
|
|
0xffffffff00000001,
|
|
0xfffffff000000001,
|
|
0xffffff0000000001,
|
|
0xfffff00000000001,
|
|
0xffff000000000001,
|
|
0xfff0000000000001,
|
|
0xff00000000000001,
|
|
0xf000000000000001,
|
|
0x8000000000000001,
|
|
}
|
|
|
|
func TestSetPanicOnFault(t *testing.T) {
|
|
old := debug.SetPanicOnFault(true)
|
|
defer debug.SetPanicOnFault(old)
|
|
|
|
nfault := 0
|
|
for _, addr := range faultAddrs {
|
|
testSetPanicOnFault(t, uintptr(addr), &nfault)
|
|
}
|
|
if nfault == 0 {
|
|
t.Fatalf("none of the addresses faulted")
|
|
}
|
|
}
|
|
|
|
func testSetPanicOnFault(t *testing.T, addr uintptr, nfault *int) {
|
|
if GOOS == "nacl" {
|
|
t.Skip("nacl doesn't seem to fault on high addresses")
|
|
}
|
|
|
|
defer func() {
|
|
if err := recover(); err != nil {
|
|
*nfault++
|
|
}
|
|
}()
|
|
|
|
// The read should fault, except that sometimes we hit
|
|
// addresses that have had C or kernel pages mapped there
|
|
// readable by user code. So just log the content.
|
|
// If no addresses fault, we'll fail the test.
|
|
v := *(*byte)(unsafe.Pointer(addr))
|
|
t.Logf("addr %#x: %#x\n", addr, v)
|
|
}
|
|
|
|
func eqstring_generic(s1, s2 string) bool {
|
|
if len(s1) != len(s2) {
|
|
return false
|
|
}
|
|
// optimization in assembly versions:
|
|
// if s1.str == s2.str { return true }
|
|
for i := 0; i < len(s1); i++ {
|
|
if s1[i] != s2[i] {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func TestEqString(t *testing.T) {
|
|
// This isn't really an exhaustive test of eqstring, it's
|
|
// just a convenient way of documenting (via eqstring_generic)
|
|
// what eqstring does.
|
|
s := []string{
|
|
"",
|
|
"a",
|
|
"c",
|
|
"aaa",
|
|
"ccc",
|
|
"cccc"[:3], // same contents, different string
|
|
"1234567890",
|
|
}
|
|
for _, s1 := range s {
|
|
for _, s2 := range s {
|
|
x := s1 == s2
|
|
y := eqstring_generic(s1, s2)
|
|
if x != y {
|
|
t.Errorf(`eqstring("%s","%s") = %t, want %t`, s1, s2, x, y)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
func TestTrailingZero(t *testing.T) {
|
|
// make sure we add padding for structs with trailing zero-sized fields
|
|
type T1 struct {
|
|
n int32
|
|
z [0]byte
|
|
}
|
|
if unsafe.Sizeof(T1{}) != 8 {
|
|
t.Errorf("sizeof(%#v)==%d, want 8", T1{}, unsafe.Sizeof(T1{}))
|
|
}
|
|
type T2 struct {
|
|
n int64
|
|
z struct{}
|
|
}
|
|
if unsafe.Sizeof(T2{}) != 8+unsafe.Sizeof(Uintreg(0)) {
|
|
t.Errorf("sizeof(%#v)==%d, want %d", T2{}, unsafe.Sizeof(T2{}), 8+unsafe.Sizeof(Uintreg(0)))
|
|
}
|
|
type T3 struct {
|
|
n byte
|
|
z [4]struct{}
|
|
}
|
|
if unsafe.Sizeof(T3{}) != 2 {
|
|
t.Errorf("sizeof(%#v)==%d, want 2", T3{}, unsafe.Sizeof(T3{}))
|
|
}
|
|
// make sure padding can double for both zerosize and alignment
|
|
type T4 struct {
|
|
a int32
|
|
b int16
|
|
c int8
|
|
z struct{}
|
|
}
|
|
if unsafe.Sizeof(T4{}) != 8 {
|
|
t.Errorf("sizeof(%#v)==%d, want 8", T4{}, unsafe.Sizeof(T4{}))
|
|
}
|
|
// make sure we don't pad a zero-sized thing
|
|
type T5 struct {
|
|
}
|
|
if unsafe.Sizeof(T5{}) != 0 {
|
|
t.Errorf("sizeof(%#v)==%d, want 0", T5{}, unsafe.Sizeof(T5{}))
|
|
}
|
|
}
|
|
*/
|
|
|
|
func TestBadOpen(t *testing.T) {
|
|
if GOOS == "windows" || GOOS == "nacl" {
|
|
t.Skip("skipping OS that doesn't have open/read/write/close")
|
|
}
|
|
// make sure we get the correct error code if open fails. Same for
|
|
// read/write/close on the resulting -1 fd. See issue 10052.
|
|
nonfile := []byte("/notreallyafile")
|
|
fd := Open(&nonfile[0], 0, 0)
|
|
if fd != -1 {
|
|
t.Errorf("open(\"%s\")=%d, want -1", string(nonfile), fd)
|
|
}
|
|
var buf [32]byte
|
|
r := Read(-1, unsafe.Pointer(&buf[0]), int32(len(buf)))
|
|
if r != -1 {
|
|
t.Errorf("read()=%d, want -1", r)
|
|
}
|
|
w := Write(^uintptr(0), unsafe.Pointer(&buf[0]), int32(len(buf)))
|
|
if w != -1 {
|
|
t.Errorf("write()=%d, want -1", w)
|
|
}
|
|
c := Close(-1)
|
|
if c != -1 {
|
|
t.Errorf("close()=%d, want -1", c)
|
|
}
|
|
}
|
|
|
|
func TestAppendGrowth(t *testing.T) {
|
|
var x []int64
|
|
check := func(want int) {
|
|
if cap(x) != want {
|
|
t.Errorf("len=%d, cap=%d, want cap=%d", len(x), cap(x), want)
|
|
}
|
|
}
|
|
|
|
check(0)
|
|
want := 1
|
|
for i := 1; i <= 100; i++ {
|
|
x = append(x, 1)
|
|
check(want)
|
|
if i&(i-1) == 0 {
|
|
want = 2 * i
|
|
}
|
|
}
|
|
}
|
|
|
|
var One = []int64{1}
|
|
|
|
func TestAppendSliceGrowth(t *testing.T) {
|
|
var x []int64
|
|
check := func(want int) {
|
|
if cap(x) != want {
|
|
t.Errorf("len=%d, cap=%d, want cap=%d", len(x), cap(x), want)
|
|
}
|
|
}
|
|
|
|
check(0)
|
|
want := 1
|
|
for i := 1; i <= 100; i++ {
|
|
x = append(x, One...)
|
|
check(want)
|
|
if i&(i-1) == 0 {
|
|
want = 2 * i
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestGoroutineProfileTrivial(t *testing.T) {
|
|
// Calling GoroutineProfile twice in a row should find the same number of goroutines,
|
|
// but it's possible there are goroutines just about to exit, so we might end up
|
|
// with fewer in the second call. Try a few times; it should converge once those
|
|
// zombies are gone.
|
|
for i := 0; ; i++ {
|
|
n1, ok := GoroutineProfile(nil) // should fail, there's at least 1 goroutine
|
|
if n1 < 1 || ok {
|
|
t.Fatalf("GoroutineProfile(nil) = %d, %v, want >0, false", n1, ok)
|
|
}
|
|
n2, ok := GoroutineProfile(make([]StackRecord, n1))
|
|
if n2 == n1 && ok {
|
|
break
|
|
}
|
|
t.Logf("GoroutineProfile(%d) = %d, %v, want %d, true", n1, n2, ok, n1)
|
|
if i >= 10 {
|
|
t.Fatalf("GoroutineProfile not converging")
|
|
}
|
|
}
|
|
}
|