package profilerecord

type StackRecord struct {
	Stack []uintptr
}

type MemProfileRecord struct {
	AllocBytes, FreeBytes     int64
	AllocObjects, FreeObjects int64
	Stack                     []uintptr
}

func (r *MemProfileRecord) InUseBytes() int64   { return r.AllocBytes - r.FreeBytes }
func (r *MemProfileRecord) InUseObjects() int64 { return r.AllocObjects - r.FreeObjects }

type BlockProfileRecord struct {

	// The loop should only execute one iteration in the common case.
	var p []runtime.MemProfileRecord
	n, ok := runtime.MemProfile(nil, true)
	for {
		// Allocate room for a slightly bigger profile,
		// in case a few more entries have been added
		// since the call to MemProfile.
		p = make([]runtime.MemProfileRecord, n+50)
		n, ok = runtime.MemProfile(p, true)
		if ok {
			p = p[0:n]
			break
		}

	for i := 0; i < 5; i++ {
		runtime.GC()
		time.Sleep(10 * time.Millisecond)
	}
	// Read memory profile.
	var prof []runtime.MemProfileRecord
	for {
		if n, ok := runtime.MemProfile(prof, false); ok {
			prof = prof[:n]
			break
		} else {
			prof = make([]runtime.MemProfileRecord, n+10)
		}
	}
	// See how much memory in tiny objects is profiled.
	var totalBytes int64
	for _, p := range prof {

	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 := []profilerecord.MemProfileRecord{

// is not used and the link type guarantees nobody else could use it
// elsewhere.
var disableMemoryProfiling bool

// A MemProfileRecord describes the live objects allocated
// by a particular call sequence (stack trace).
type MemProfileRecord struct {
	AllocBytes, FreeBytes     int64       // number of bytes allocated, freed
	AllocObjects, FreeObjects int64       // number of objects allocated, freed

import (
	"internal/profilerecord"
	"io"
	"math"
	"runtime"
	"strings"
)

// writeHeapProto writes the current heap profile in protobuf format to w.
func writeHeapProto(w io.Writer, p []profilerecord.MemProfileRecord, rate int64, defaultSampleType string) error {
	b := newProfileBuilder(w)
	b.pbValueType(tagProfile_PeriodType, "space", "bytes")
	b.pb.int64Opt(tagProfile_Period, rate)

	// The loop should only execute one iteration in the common case.
	var p []profilerecord.MemProfileRecord
	n, ok := pprof_memProfileInternal(nil, true)
	for {
		// Allocate room for a slightly bigger profile,
		// in case a few more entries have been added
		// since the call to MemProfile.
		p = make([]profilerecord.MemProfileRecord, n+50)
		n, ok = pprof_memProfileInternal(p, true)
		if ok {
			p = p[0:n]
			break

		{"LockOSThread", Func, 0},
		{"MemProfile", Func, 0},
		{"MemProfileRate", Var, 0},
		{"MemProfileRecord", Type, 0},
		{"MemProfileRecord.AllocBytes", Field, 0},
		{"MemProfileRecord.AllocObjects", Field, 0},
		{"MemProfileRecord.FreeBytes", Field, 0},
		{"MemProfileRecord.FreeObjects", Field, 0},
		{"MemProfileRecord.Stack0", Field, 0},
		{"MemStats", Type, 0},
		{"MemStats.Alloc", Field, 0},

	}
	for i := range prefix {
		if stk[i] != prefix[i] {
			return false
		}
	}
	return true
}

// ensure that stack records are valid map keys (comparable)
var _ = map[runtime.MemProfileRecord]struct{}{}
var _ = map[runtime.StackRecord]struct{}{}

// allocDeep calls itself n times before calling fn.
func allocDeep(n int) {
	if n > 1 {
		allocDeep(n - 1)
		return
	}