128 lines
2.7 KiB
Go
128 lines
2.7 KiB
Go
// Copyright 2012 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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package runtime_test
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import (
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"io"
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// "io/ioutil"
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// "os"
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// "os/exec"
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// . "runtime"
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// "strconv"
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// "strings"
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"testing"
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)
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var errf error
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func errfn() error {
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return errf
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}
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func errfn1() error {
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return io.EOF
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}
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func BenchmarkIfaceCmp100(b *testing.B) {
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for i := 0; i < b.N; i++ {
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for j := 0; j < 100; j++ {
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if errfn() == io.EOF {
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b.Fatal("bad comparison")
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}
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}
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}
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}
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func BenchmarkIfaceCmpNil100(b *testing.B) {
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for i := 0; i < b.N; i++ {
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for j := 0; j < 100; j++ {
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if errfn1() == nil {
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b.Fatal("bad comparison")
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}
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}
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}
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}
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func BenchmarkDefer(b *testing.B) {
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for i := 0; i < b.N; i++ {
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defer1()
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}
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}
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func defer1() {
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defer func(x, y, z int) {
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if recover() != nil || x != 1 || y != 2 || z != 3 {
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panic("bad recover")
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}
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}(1, 2, 3)
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return
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}
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func BenchmarkDefer10(b *testing.B) {
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for i := 0; i < b.N/10; i++ {
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defer2()
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}
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}
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func defer2() {
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for i := 0; i < 10; i++ {
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defer func(x, y, z int) {
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if recover() != nil || x != 1 || y != 2 || z != 3 {
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panic("bad recover")
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}
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}(1, 2, 3)
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}
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}
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func BenchmarkDeferMany(b *testing.B) {
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for i := 0; i < b.N; i++ {
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defer func(x, y, z int) {
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if recover() != nil || x != 1 || y != 2 || z != 3 {
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panic("bad recover")
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}
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}(1, 2, 3)
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}
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}
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/* The go tool is not present in gccgo.
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// The profiling signal handler needs to know whether it is executing runtime.gogo.
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// The constant RuntimeGogoBytes in arch_*.h gives the size of the function;
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// we don't have a way to obtain it from the linker (perhaps someday).
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// Test that the constant matches the size determined by 'go tool nm -S'.
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// The value reported will include the padding between runtime.gogo and the
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// next function in memory. That's fine.
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func TestRuntimeGogoBytes(t *testing.T) {
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dir, err := ioutil.TempDir("", "go-build")
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if err != nil {
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t.Fatalf("failed to create temp directory: %v", err)
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}
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defer os.RemoveAll(dir)
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out, err := exec.Command("go", "build", "-o", dir+"/hello", "../../../test/helloworld.go").CombinedOutput()
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if err != nil {
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t.Fatalf("building hello world: %v\n%s", err, out)
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}
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out, err = exec.Command("go", "tool", "nm", "-S", dir+"/hello").CombinedOutput()
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if err != nil {
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t.Fatalf("go tool nm: %v\n%s", err, out)
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}
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for _, line := range strings.Split(string(out), "\n") {
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f := strings.Fields(line)
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if len(f) == 4 && f[3] == "runtime.gogo" {
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size, _ := strconv.Atoi(f[1])
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if GogoBytes() != int32(size) {
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t.Fatalf("RuntimeGogoBytes = %d, should be %d", GogoBytes(), size)
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}
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return
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}
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}
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t.Fatalf("go tool nm did not report size for runtime.gogo")
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}
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*/
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