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-rw-r--r--src/runtime/profbuf_test.go182
1 files changed, 182 insertions, 0 deletions
diff --git a/src/runtime/profbuf_test.go b/src/runtime/profbuf_test.go
new file mode 100644
index 0000000..d9c5264
--- /dev/null
+++ b/src/runtime/profbuf_test.go
@@ -0,0 +1,182 @@
+// Copyright 2017 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 (
+ "reflect"
+ . "runtime"
+ "testing"
+ "time"
+ "unsafe"
+)
+
+func TestProfBuf(t *testing.T) {
+ const hdrSize = 2
+
+ write := func(t *testing.T, b *ProfBuf, tag unsafe.Pointer, now int64, hdr []uint64, stk []uintptr) {
+ b.Write(&tag, now, hdr, stk)
+ }
+ read := func(t *testing.T, b *ProfBuf, data []uint64, tags []unsafe.Pointer) {
+ rdata, rtags, eof := b.Read(ProfBufNonBlocking)
+ if !reflect.DeepEqual(rdata, data) || !reflect.DeepEqual(rtags, tags) {
+ t.Fatalf("unexpected profile read:\nhave data %#x\nwant data %#x\nhave tags %#x\nwant tags %#x", rdata, data, rtags, tags)
+ }
+ if eof {
+ t.Fatalf("unexpected eof")
+ }
+ }
+ readBlock := func(t *testing.T, b *ProfBuf, data []uint64, tags []unsafe.Pointer) func() {
+ c := make(chan int)
+ go func() {
+ eof := data == nil
+ rdata, rtags, reof := b.Read(ProfBufBlocking)
+ if !reflect.DeepEqual(rdata, data) || !reflect.DeepEqual(rtags, tags) || reof != eof {
+ // Errorf, not Fatalf, because called in goroutine.
+ t.Errorf("unexpected profile read:\nhave data %#x\nwant data %#x\nhave tags %#x\nwant tags %#x\nhave eof=%v, want %v", rdata, data, rtags, tags, reof, eof)
+ }
+ c <- 1
+ }()
+ time.Sleep(10 * time.Millisecond) // let goroutine run and block
+ return func() {
+ select {
+ case <-c:
+ case <-time.After(1 * time.Second):
+ t.Fatalf("timeout waiting for blocked read")
+ }
+ }
+ }
+ readEOF := func(t *testing.T, b *ProfBuf) {
+ rdata, rtags, eof := b.Read(ProfBufBlocking)
+ if rdata != nil || rtags != nil || !eof {
+ t.Errorf("unexpected profile read: %#x, %#x, eof=%v; want nil, nil, eof=true", rdata, rtags, eof)
+ }
+ rdata, rtags, eof = b.Read(ProfBufNonBlocking)
+ if rdata != nil || rtags != nil || !eof {
+ t.Errorf("unexpected profile read (non-blocking): %#x, %#x, eof=%v; want nil, nil, eof=true", rdata, rtags, eof)
+ }
+ }
+
+ myTags := make([]byte, 100)
+ t.Logf("myTags is %p", &myTags[0])
+
+ t.Run("BasicWriteRead", func(t *testing.T) {
+ b := NewProfBuf(2, 11, 1)
+ write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
+ read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])})
+ read(t, b, nil, nil) // release data returned by previous read
+ write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
+ read(t, b, []uint64{8, 99, 101, 102, 201, 202, 203, 204}, []unsafe.Pointer{unsafe.Pointer(&myTags[2])})
+ })
+
+ t.Run("ReadMany", func(t *testing.T) {
+ b := NewProfBuf(2, 50, 50)
+ write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
+ write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
+ write(t, b, unsafe.Pointer(&myTags[1]), 500, []uint64{502, 504}, []uintptr{506})
+ read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 99, 101, 102, 201, 202, 203, 204, 5, 500, 502, 504, 506}, []unsafe.Pointer{unsafe.Pointer(&myTags[0]), unsafe.Pointer(&myTags[2]), unsafe.Pointer(&myTags[1])})
+ })
+
+ t.Run("ReadManyShortData", func(t *testing.T) {
+ b := NewProfBuf(2, 50, 50)
+ write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
+ write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
+ read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 99, 101, 102, 201, 202, 203, 204}, []unsafe.Pointer{unsafe.Pointer(&myTags[0]), unsafe.Pointer(&myTags[2])})
+ })
+
+ t.Run("ReadManyShortTags", func(t *testing.T) {
+ b := NewProfBuf(2, 50, 50)
+ write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
+ write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
+ read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 99, 101, 102, 201, 202, 203, 204}, []unsafe.Pointer{unsafe.Pointer(&myTags[0]), unsafe.Pointer(&myTags[2])})
+ })
+
+ t.Run("ReadAfterOverflow1", func(t *testing.T) {
+ // overflow record synthesized by write
+ b := NewProfBuf(2, 16, 5)
+ write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9}) // uses 10
+ read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])}) // reads 10 but still in use until next read
+ write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5}) // uses 6
+ read(t, b, []uint64{6, 1, 2, 3, 4, 5}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])}) // reads 6 but still in use until next read
+ // now 10 available
+ write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204, 205, 206, 207, 208, 209}) // no room
+ for i := 0; i < 299; i++ {
+ write(t, b, unsafe.Pointer(&myTags[3]), int64(100+i), []uint64{101, 102}, []uintptr{201, 202, 203, 204}) // no room for overflow+this record
+ }
+ write(t, b, unsafe.Pointer(&myTags[1]), 500, []uint64{502, 504}, []uintptr{506}) // room for overflow+this record
+ read(t, b, []uint64{5, 99, 0, 0, 300, 5, 500, 502, 504, 506}, []unsafe.Pointer{nil, unsafe.Pointer(&myTags[1])})
+ })
+
+ t.Run("ReadAfterOverflow2", func(t *testing.T) {
+ // overflow record synthesized by read
+ b := NewProfBuf(2, 16, 5)
+ write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
+ write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213})
+ for i := 0; i < 299; i++ {
+ write(t, b, unsafe.Pointer(&myTags[3]), 100, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
+ }
+ read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])}) // reads 10 but still in use until next read
+ write(t, b, unsafe.Pointer(&myTags[1]), 500, []uint64{502, 504}, []uintptr{}) // still overflow
+ read(t, b, []uint64{5, 99, 0, 0, 301}, []unsafe.Pointer{nil}) // overflow synthesized by read
+ write(t, b, unsafe.Pointer(&myTags[1]), 500, []uint64{502, 505}, []uintptr{506}) // written
+ read(t, b, []uint64{5, 500, 502, 505, 506}, []unsafe.Pointer{unsafe.Pointer(&myTags[1])})
+ })
+
+ t.Run("ReadAtEndAfterOverflow", func(t *testing.T) {
+ b := NewProfBuf(2, 12, 5)
+ write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
+ write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
+ for i := 0; i < 299; i++ {
+ write(t, b, unsafe.Pointer(&myTags[3]), 100, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
+ }
+ read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])})
+ read(t, b, []uint64{5, 99, 0, 0, 300}, []unsafe.Pointer{nil})
+ write(t, b, unsafe.Pointer(&myTags[1]), 500, []uint64{502, 504}, []uintptr{506})
+ read(t, b, []uint64{5, 500, 502, 504, 506}, []unsafe.Pointer{unsafe.Pointer(&myTags[1])})
+ })
+
+ t.Run("BlockingWriteRead", func(t *testing.T) {
+ b := NewProfBuf(2, 11, 1)
+ wait := readBlock(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])})
+ write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
+ wait()
+ wait = readBlock(t, b, []uint64{8, 99, 101, 102, 201, 202, 203, 204}, []unsafe.Pointer{unsafe.Pointer(&myTags[2])})
+ time.Sleep(10 * time.Millisecond)
+ write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
+ wait()
+ wait = readBlock(t, b, nil, nil)
+ b.Close()
+ wait()
+ wait = readBlock(t, b, nil, nil)
+ wait()
+ readEOF(t, b)
+ })
+
+ t.Run("DataWraparound", func(t *testing.T) {
+ b := NewProfBuf(2, 16, 1024)
+ for i := 0; i < 10; i++ {
+ write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
+ read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])})
+ read(t, b, nil, nil) // release data returned by previous read
+ }
+ })
+
+ t.Run("TagWraparound", func(t *testing.T) {
+ b := NewProfBuf(2, 1024, 2)
+ for i := 0; i < 10; i++ {
+ write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
+ read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])})
+ read(t, b, nil, nil) // release data returned by previous read
+ }
+ })
+
+ t.Run("BothWraparound", func(t *testing.T) {
+ b := NewProfBuf(2, 16, 2)
+ for i := 0; i < 10; i++ {
+ write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
+ read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])})
+ read(t, b, nil, nil) // release data returned by previous read
+ }
+ })
+}