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// Copyright 2016 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 pprof
import (
"bytes"
"fmt"
"internal/profile"
"internal/testenv"
"runtime"
"slices"
"strings"
"testing"
)
func TestConvertMemProfile(t *testing.T) {
addr1, addr2, map1, map2 := testPCs(t)
// MemProfileRecord stacks are return PCs, so add one to the
// addresses recorded in the "profile". The proto profile
// locations are call PCs, so conversion will subtract one
// from these and get back to addr1 and addr2.
a1, a2 := uintptr(addr1)+1, uintptr(addr2)+1
rate := int64(512 * 1024)
rec := []runtime.MemProfileRecord{
{AllocBytes: 4096, FreeBytes: 1024, AllocObjects: 4, FreeObjects: 1, Stack0: [32]uintptr{a1, a2}},
{AllocBytes: 512 * 1024, FreeBytes: 0, AllocObjects: 1, FreeObjects: 0, Stack0: [32]uintptr{a2 + 1, a2 + 2}},
{AllocBytes: 512 * 1024, FreeBytes: 512 * 1024, AllocObjects: 1, FreeObjects: 1, Stack0: [32]uintptr{a1 + 1, a1 + 2, a2 + 3}},
}
periodType := &profile.ValueType{Type: "space", Unit: "bytes"}
sampleType := []*profile.ValueType{
{Type: "alloc_objects", Unit: "count"},
{Type: "alloc_space", Unit: "bytes"},
{Type: "inuse_objects", Unit: "count"},
{Type: "inuse_space", Unit: "bytes"},
}
samples := []*profile.Sample{
{
Value: []int64{2050, 2099200, 1537, 1574400},
Location: []*profile.Location{
{ID: 1, Mapping: map1, Address: addr1},
{ID: 2, Mapping: map2, Address: addr2},
},
NumLabel: map[string][]int64{"bytes": {1024}},
},
{
Value: []int64{1, 829411, 1, 829411},
Location: []*profile.Location{
{ID: 3, Mapping: map2, Address: addr2 + 1},
{ID: 4, Mapping: map2, Address: addr2 + 2},
},
NumLabel: map[string][]int64{"bytes": {512 * 1024}},
},
{
Value: []int64{1, 829411, 0, 0},
Location: []*profile.Location{
{ID: 5, Mapping: map1, Address: addr1 + 1},
{ID: 6, Mapping: map1, Address: addr1 + 2},
{ID: 7, Mapping: map2, Address: addr2 + 3},
},
NumLabel: map[string][]int64{"bytes": {512 * 1024}},
},
}
for _, tc := range []struct {
name string
defaultSampleType string
}{
{"heap", ""},
{"allocs", "alloc_space"},
} {
t.Run(tc.name, func(t *testing.T) {
var buf bytes.Buffer
if err := writeHeapProto(&buf, rec, rate, tc.defaultSampleType); err != nil {
t.Fatalf("writing profile: %v", err)
}
p, err := profile.Parse(&buf)
if err != nil {
t.Fatalf("profile.Parse: %v", err)
}
checkProfile(t, p, rate, periodType, sampleType, samples, tc.defaultSampleType)
})
}
}
func genericAllocFunc[T interface{ uint32 | uint64 }](n int) []T {
return make([]T, n)
}
func profileToStrings(p *profile.Profile) []string {
var res []string
for _, s := range p.Sample {
res = append(res, sampleToString(s))
}
return res
}
func sampleToString(s *profile.Sample) string {
var funcs []string
for i := len(s.Location) - 1; i >= 0; i-- {
loc := s.Location[i]
funcs = locationToStrings(loc, funcs)
}
return fmt.Sprintf("%s %v", strings.Join(funcs, ";"), s.Value)
}
func locationToStrings(loc *profile.Location, funcs []string) []string {
for j := range loc.Line {
line := loc.Line[len(loc.Line)-1-j]
funcs = append(funcs, line.Function.Name)
}
return funcs
}
// This is a regression test for https://go.dev/issue/64528 .
func TestGenericsHashKeyInPprofBuilder(t *testing.T) {
previousRate := runtime.MemProfileRate
runtime.MemProfileRate = 1
defer func() {
runtime.MemProfileRate = previousRate
}()
for _, sz := range []int{128, 256} {
genericAllocFunc[uint32](sz / 4)
}
for _, sz := range []int{32, 64} {
genericAllocFunc[uint64](sz / 8)
}
runtime.GC()
buf := bytes.NewBuffer(nil)
if err := WriteHeapProfile(buf); err != nil {
t.Fatalf("writing profile: %v", err)
}
p, err := profile.Parse(buf)
if err != nil {
t.Fatalf("profile.Parse: %v", err)
}
actual := profileToStrings(p)
expected := []string{
"testing.tRunner;runtime/pprof.TestGenericsHashKeyInPprofBuilder;runtime/pprof.genericAllocFunc[go.shape.uint32] [1 128 0 0]",
"testing.tRunner;runtime/pprof.TestGenericsHashKeyInPprofBuilder;runtime/pprof.genericAllocFunc[go.shape.uint32] [1 256 0 0]",
"testing.tRunner;runtime/pprof.TestGenericsHashKeyInPprofBuilder;runtime/pprof.genericAllocFunc[go.shape.uint64] [1 32 0 0]",
"testing.tRunner;runtime/pprof.TestGenericsHashKeyInPprofBuilder;runtime/pprof.genericAllocFunc[go.shape.uint64] [1 64 0 0]",
}
for _, l := range expected {
if !slices.Contains(actual, l) {
t.Errorf("profile = %v\nwant = %v", strings.Join(actual, "\n"), l)
}
}
}
type opAlloc struct {
buf [128]byte
}
type opCall struct {
}
var sink []byte
func storeAlloc() {
sink = make([]byte, 16)
}
func nonRecursiveGenericAllocFunction[CurrentOp any, OtherOp any](alloc bool) {
if alloc {
storeAlloc()
} else {
nonRecursiveGenericAllocFunction[OtherOp, CurrentOp](true)
}
}
func TestGenericsInlineLocations(t *testing.T) {
if testenv.OptimizationOff() {
t.Skip("skipping test with optimizations disabled")
}
previousRate := runtime.MemProfileRate
runtime.MemProfileRate = 1
defer func() {
runtime.MemProfileRate = previousRate
sink = nil
}()
nonRecursiveGenericAllocFunction[opAlloc, opCall](true)
nonRecursiveGenericAllocFunction[opCall, opAlloc](false)
runtime.GC()
buf := bytes.NewBuffer(nil)
if err := WriteHeapProfile(buf); err != nil {
t.Fatalf("writing profile: %v", err)
}
p, err := profile.Parse(buf)
if err != nil {
t.Fatalf("profile.Parse: %v", err)
}
const expectedSample = "testing.tRunner;runtime/pprof.TestGenericsInlineLocations;runtime/pprof.nonRecursiveGenericAllocFunction[go.shape.struct {},go.shape.struct { runtime/pprof.buf [128]uint8 }];runtime/pprof.nonRecursiveGenericAllocFunction[go.shape.struct { runtime/pprof.buf [128]uint8 },go.shape.struct {}];runtime/pprof.storeAlloc [1 16 1 16]"
const expectedLocation = "runtime/pprof.nonRecursiveGenericAllocFunction[go.shape.struct {},go.shape.struct { runtime/pprof.buf [128]uint8 }];runtime/pprof.nonRecursiveGenericAllocFunction[go.shape.struct { runtime/pprof.buf [128]uint8 },go.shape.struct {}];runtime/pprof.storeAlloc"
const expectedLocationNewInliner = "runtime/pprof.TestGenericsInlineLocations;" + expectedLocation
var s *profile.Sample
for _, sample := range p.Sample {
if sampleToString(sample) == expectedSample {
s = sample
break
}
}
if s == nil {
t.Fatalf("expected \n%s\ngot\n%s", expectedSample, strings.Join(profileToStrings(p), "\n"))
}
loc := s.Location[0]
actual := strings.Join(locationToStrings(loc, nil), ";")
if expectedLocation != actual && expectedLocationNewInliner != actual {
t.Errorf("expected a location with at least 3 functions\n%s\ngot\n%s\n", expectedLocation, actual)
}
}
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