mirror of
https://github.com/autc04/Retro68.git
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105 lines
3.3 KiB
Go
105 lines
3.3 KiB
Go
// Copyright 2016 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 protopprof
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import (
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"bytes"
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"internal/pprof/profile"
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"io/ioutil"
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"reflect"
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"runtime"
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"testing"
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"time"
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)
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// TestSampledHeapAllocProfile tests encoding of a memory profile from
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// runtime.MemProfileRecord data.
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func TestSampledHeapAllocProfile(t *testing.T) {
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if runtime.GOOS != "linux" {
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t.Skip("Test requires a system with /proc/self/maps")
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}
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// Figure out two addresses from /proc/self/maps.
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mmap, err := ioutil.ReadFile("/proc/self/maps")
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if err != nil {
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t.Fatal("Cannot read /proc/self/maps")
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}
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rd := bytes.NewReader(mmap)
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mprof := &profile.Profile{}
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if err = mprof.ParseMemoryMap(rd); err != nil {
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t.Fatalf("Cannot parse /proc/self/maps")
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}
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if len(mprof.Mapping) < 2 {
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// It is possible for a binary to only have 1 executable
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// region of memory.
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t.Skipf("need 2 or more mappings, got %v", len(mprof.Mapping))
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}
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address1 := mprof.Mapping[0].Start
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address2 := mprof.Mapping[1].Start
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var buf bytes.Buffer
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rec, rate := testMemRecords(address1, address2)
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p := EncodeMemProfile(rec, rate, time.Now())
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if err := p.Write(&buf); err != nil {
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t.Fatalf("Failed to write profile: %v", err)
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}
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p, err = profile.Parse(&buf)
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if err != nil {
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t.Fatalf("Could not parse Profile profile: %v", err)
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}
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// Expected PeriodType, SampleType and Sample.
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expectedPeriodType := &profile.ValueType{Type: "space", Unit: "bytes"}
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expectedSampleType := []*profile.ValueType{
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{Type: "alloc_objects", Unit: "count"},
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{Type: "alloc_space", Unit: "bytes"},
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{Type: "inuse_objects", Unit: "count"},
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{Type: "inuse_space", Unit: "bytes"},
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}
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// Expected samples, with values unsampled according to the profiling rate.
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expectedSample := []*profile.Sample{
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{Value: []int64{2050, 2099200, 1537, 1574400}, Location: []*profile.Location{
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{ID: 1, Mapping: mprof.Mapping[0], Address: address1},
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{ID: 2, Mapping: mprof.Mapping[1], Address: address2},
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}},
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{Value: []int64{1, 829411, 1, 829411}, Location: []*profile.Location{
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{ID: 3, Mapping: mprof.Mapping[1], Address: address2 + 1},
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{ID: 4, Mapping: mprof.Mapping[1], Address: address2 + 2},
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}},
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{Value: []int64{1, 829411, 0, 0}, Location: []*profile.Location{
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{ID: 5, Mapping: mprof.Mapping[0], Address: address1 + 1},
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{ID: 6, Mapping: mprof.Mapping[0], Address: address1 + 2},
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{ID: 7, Mapping: mprof.Mapping[1], Address: address2 + 3},
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}},
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}
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if p.Period != 512*1024 {
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t.Fatalf("Sampling periods do not match")
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}
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if !reflect.DeepEqual(p.PeriodType, expectedPeriodType) {
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t.Fatalf("Period types do not match")
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}
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if !reflect.DeepEqual(p.SampleType, expectedSampleType) {
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t.Fatalf("Sample types do not match")
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}
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if !reflect.DeepEqual(p.Sample, expectedSample) {
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t.Fatalf("Samples do not match: Expected: %v, Got:%v", getSampleAsString(expectedSample),
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getSampleAsString(p.Sample))
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}
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}
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func testMemRecords(a1, a2 uint64) ([]runtime.MemProfileRecord, int64) {
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addr1, addr2 := uintptr(a1), uintptr(a2)
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rate := int64(512 * 1024)
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rec := []runtime.MemProfileRecord{
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{4096, 1024, 4, 1, [32]uintptr{addr1, addr2}},
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{512 * 1024, 0, 1, 0, [32]uintptr{addr2 + 1, addr2 + 2}},
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{512 * 1024, 512 * 1024, 1, 1, [32]uintptr{addr1 + 1, addr1 + 2, addr2 + 3}},
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}
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return rec, rate
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}
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