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