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runtimex_test.go
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runtimex_test.go
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// Copyright 2024 CloudWeGo Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package runtimex_test
import (
"runtime"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/modern-go/reflect2"
"github.com/cloudwego/runtimex"
)
//go:noinline
func testStackFunction(n int) int {
var stack [1024 * 4]int64
for i := 0; i < len(stack); i++ {
stack[i] = int64(n + i)
}
return int(stack[len(stack)/2])
}
func assert(t *testing.T, cond bool, args ...interface{}) {
t.Helper()
if cond {
return
}
if len(args) > 0 {
t.Fatal(args...)
}
t.Fatal("assertion failed")
}
func TestReflect2NotFound(t *testing.T) {
notFound, _ := reflect2.TypeByName("runtime.xxx123").(reflect2.StructType)
assert(t, notFound == nil)
gType := reflect2.TypeByName("runtime.g").(reflect2.StructType)
assert(t, gType != nil, gType)
mField := gType.FieldByName("xxx123")
assert(t, mField == nil)
}
func TestRuntimeStatus(t *testing.T) {
goroutines := 8
pnum := 4
oldpnum := runtime.GOMAXPROCS(pnum)
defer runtime.GOMAXPROCS(oldpnum)
var (
stop int32
wg sync.WaitGroup
gm sync.Map
pm sync.Map
)
for i := 0; i < goroutines; i++ {
wg.Add(1)
go func(n int) {
defer wg.Done()
for j := 1; atomic.LoadInt32(&stop) == 0; j++ {
testStackFunction(j % 102400)
if j%1024 == 0 {
gid, err := runtimex.GID()
assert(t, err == nil)
pid, err := runtimex.PID()
assert(t, err == nil)
t.Logf("gid=%d,pid=%d", gid, pid)
gm.Store(gid, true)
pm.Store(pid, true)
}
}
}(i)
}
time.Sleep(time.Second)
atomic.StoreInt32(&stop, 1)
wg.Wait()
gcount := 0
gm.Range(func(key, value interface{}) bool {
gcount++
return true
})
pcount := 0
pm.Range(func(key, value interface{}) bool {
pcount++
return true
})
assert(t, gcount == goroutines, gcount, goroutines)
assert(t, pcount == pnum, pcount, pnum)
}
func BenchmarkGID(b *testing.B) {
b.ReportAllocs()
// 0 allocs/op
for i := 0; i < b.N; i++ {
id, err := runtimex.GID()
if id < 0 || err != nil {
b.Fatal(err)
}
}
}
func BenchmarkPID(b *testing.B) {
b.ReportAllocs()
// 0 allocs/op
for i := 0; i < b.N; i++ {
id, err := runtimex.PID()
if id < 0 || err != nil {
b.Fatal(err)
}
}
}