1 // Copyright 2014 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package debug_test 6 7 import ( 8 "io/ioutil" 9 "os" 10 "runtime" 11 . "runtime/debug" 12 "testing" 13 ) 14 15 func TestWriteHeapDumpNonempty(t *testing.T) { 16 if runtime.GOOS == "nacl" { 17 t.Skip("WriteHeapDump is not available on NaCl.") 18 } 19 f, err := ioutil.TempFile("", "heapdumptest") 20 if err != nil { 21 t.Fatalf("TempFile failed: %v", err) 22 } 23 defer os.Remove(f.Name()) 24 defer f.Close() 25 WriteHeapDump(f.Fd()) 26 fi, err := f.Stat() 27 if err != nil { 28 t.Fatalf("Stat failed: %v", err) 29 } 30 const minSize = 1 31 if size := fi.Size(); size < minSize { 32 t.Fatalf("Heap dump size %d bytes, expected at least %d bytes", size, minSize) 33 } 34 } 35 36 type Obj struct { 37 x, y int 38 } 39 40 func objfin(x *Obj) { 41 //println("finalized", x) 42 } 43 44 func TestWriteHeapDumpFinalizers(t *testing.T) { 45 if runtime.GOOS == "nacl" { 46 t.Skip("WriteHeapDump is not available on NaCl.") 47 } 48 f, err := ioutil.TempFile("", "heapdumptest") 49 if err != nil { 50 t.Fatalf("TempFile failed: %v", err) 51 } 52 defer os.Remove(f.Name()) 53 defer f.Close() 54 55 // bug 9172: WriteHeapDump couldn't handle more than one finalizer 56 println("allocating objects") 57 x := &Obj{} 58 runtime.SetFinalizer(x, objfin) 59 y := &Obj{} 60 runtime.SetFinalizer(y, objfin) 61 62 // Trigger collection of x and y, queueing of their finalizers. 63 println("starting gc") 64 runtime.GC() 65 66 // Make sure WriteHeapDump doesn't fail with multiple queued finalizers. 67 println("starting dump") 68 WriteHeapDump(f.Fd()) 69 println("done dump") 70 } 71
