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package btf
import (
"bytes"
"encoding/binary"
"strings"
"testing"
"github.com/cilium/ebpf/internal"
"github.com/go-quicktest/qt"
)
func TestParseExtInfoBigRecordSize(t *testing.T) {
rd := strings.NewReader("\xff\xff\xff\xff\x00\x00\x00\x000709171295166016")
table, err := readStringTable(bytes.NewReader([]byte{0}), nil)
if err != nil {
t.Fatal(err)
}
if _, err := parseFuncInfos(rd, internal.NativeEndian, table); err == nil {
t.Error("Parsing func info with large record size doesn't return an error")
}
if _, err := parseLineInfos(rd, internal.NativeEndian, table); err == nil {
t.Error("Parsing line info with large record size doesn't return an error")
}
}
func BenchmarkParseLineInfoRecords(b *testing.B) {
size := uint32(binary.Size(bpfLineInfo{}))
count := uint32(4096)
buf := make([]byte, size*count)
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
parseLineInfoRecords(bytes.NewReader(buf), internal.NativeEndian, size, count, true)
}
}
func TestParseLineInfoRecordsAllocations(t *testing.T) {
size := uint32(binary.Size(bpfLineInfo{}))
count := uint32(4096)
buf := make([]byte, size*count)
allocs := testing.AllocsPerRun(5, func() {
parseLineInfoRecords(bytes.NewReader(buf), internal.NativeEndian, size, count, true)
})
// 7 is the number of allocations on go 1.22
// what we want to test is that we are not allocating
// once per record
qt.Assert(t, qt.IsTrue(allocs <= 7))
}
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