// Copyright 2014 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 debug_test
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import (
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"io/ioutil"
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"os"
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"runtime"
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. "runtime/debug"
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"testing"
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)
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func TestWriteHeapDumpNonempty(t *testing.T) {
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if runtime.GOOS == "nacl" || runtime.GOOS == "js" {
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t.Skipf("WriteHeapDump is not available on %s.", runtime.GOOS)
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}
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f, err := ioutil.TempFile("", "heapdumptest")
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if err != nil {
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t.Fatalf("TempFile failed: %v", err)
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}
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defer os.Remove(f.Name())
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defer f.Close()
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WriteHeapDump(f.Fd())
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fi, err := f.Stat()
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if err != nil {
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t.Fatalf("Stat failed: %v", err)
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}
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const minSize = 1
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if size := fi.Size(); size < minSize {
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t.Fatalf("Heap dump size %d bytes, expected at least %d bytes", size, minSize)
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}
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}
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type Obj struct {
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x, y int
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}
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func objfin(x *Obj) {
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//println("finalized", x)
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}
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func TestWriteHeapDumpFinalizers(t *testing.T) {
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if runtime.GOOS == "nacl" || runtime.GOOS == "js" {
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t.Skipf("WriteHeapDump is not available on %s.", runtime.GOOS)
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}
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f, err := ioutil.TempFile("", "heapdumptest")
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if err != nil {
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t.Fatalf("TempFile failed: %v", err)
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}
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defer os.Remove(f.Name())
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defer f.Close()
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// bug 9172: WriteHeapDump couldn't handle more than one finalizer
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println("allocating objects")
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x := &Obj{}
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runtime.SetFinalizer(x, objfin)
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y := &Obj{}
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runtime.SetFinalizer(y, objfin)
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// Trigger collection of x and y, queueing of their finalizers.
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println("starting gc")
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runtime.GC()
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// Make sure WriteHeapDump doesn't fail with multiple queued finalizers.
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println("starting dump")
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WriteHeapDump(f.Fd())
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println("done dump")
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}
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