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llvm.go
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llvm.go
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package main
import (
"bytes"
"encoding/json"
"errors"
"io"
"strconv"
)
type LLVMData struct {
Version string `json:"version"`
Type string `json:"type"`
Data []LLVMData2 `json:"data"`
}
type LLVMData2 struct {
Files []LLVMFile `json:"files"`
Functions []LLVMFunction `json:"functions"`
}
type LLVMFile struct {
Filename string `json:"filename"`
Segments []LLVMSegment `json:"segments"`
}
type LLVMFunction struct {
Name string `json:"name"`
Count uint64 `json:"count"`
Regions [][]int `json:"regions"`
Filenames []string `json:"filenames"`
}
type LLVMSegment struct {
Line int
Column int
Count uint64
HasCount bool
IsRegionEntry bool
}
func (s *LLVMSegment) UnmarshalJSON(data []byte) error {
// Strip of the outer square brackets for the array.
if data[0] != '[' || data[len(data)-1] != ']' {
return errors.New("expected an array")
}
data = data[1 : len(data)-1]
// Get the Line
ndx := bytes.IndexByte(data, ',')
if ndx < 1 {
return errors.New("expected at least 5 elements in the array")
}
tmp, err := strconv.ParseInt(string(data[:ndx]), 10, 64)
if err != nil {
return err
}
s.Line = int(tmp)
data = data[ndx+1:]
// Get the Column
ndx = bytes.IndexByte(data, ',')
if ndx < 1 {
return errors.New("expected at least 5 elements in the array")
}
tmp, err = strconv.ParseInt(string(data[:ndx]), 10, 64)
if err != nil {
return err
}
s.Column = int(tmp)
data = data[ndx+1:]
// Get the Count
ndx = bytes.IndexByte(data, ',')
if ndx < 1 {
return errors.New("expected at least 5 elements in the array")
}
s.Count, err = strconv.ParseUint(string(data[:ndx]), 10, 64)
if err != nil {
return err
}
data = data[ndx+1:]
// Get the HasCount
ndx = bytes.IndexByte(data, ',')
if ndx < 1 {
return errors.New("expected at least 5 elements in the array")
}
s.HasCount, err = strconv.ParseBool(string(data[:ndx]))
if err != nil {
return err
}
data = data[ndx+1:]
// Get the IsRegionEntry
ndx = bytes.IndexByte(data, ',')
if ndx >= 1 {
// Ignore any new elements in the array.
data = data[:ndx]
}
s.IsRegionEntry, err = strconv.ParseBool(string(data))
if err != nil {
return err
}
return nil
}
func loadLLVMFile(fds FileDataSet, file io.Reader) error {
data := LLVMData{}
err := json.NewDecoder(file).Decode(&data)
if err != nil {
return err
}
if data.Type != "llvm.coverage.json.export" {
return errors.New("incorrect type for JSON data from LLVM: " + data.Type)
}
for _, v := range data.Data {
for _, w := range v.Files {
currentData := fds.FileData(w.Filename)
for i := range w.Segments[:len(w.Segments)-1] {
hasCount := w.Segments[i].HasCount
isRegionEntry := w.Segments[i].IsRegionEntry
if isRegionEntry && hasCount {
currentData.AppendRegionData(
w.Segments[i].Line,
w.Segments[i].Column,
w.Segments[i+1].Line,
w.Segments[i+1].Column,
uint64(w.Segments[i].Count),
)
}
}
}
for _, w := range v.Functions {
currentData := fds.FileData(w.Filenames[0])
currentData.AppendFunctionData(w.Name, w.Regions[0][0], w.Count)
}
}
return nil
}