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conprof: support heap profiling for tikv (#199)
close #197
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| package jeprof | ||
|
|
||
| import ( | ||
| "bytes" | ||
| _ "embed" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| "os/exec" | ||
| "strings" | ||
|
|
||
| graphviz "github.com/goccy/go-graphviz" | ||
| ) | ||
|
|
||
| //go:embed jeprof.in | ||
| var jeprof string | ||
|
|
||
| func FetchRaw(url string) ([]byte, error) { | ||
| cmd := exec.Command("perl", "/dev/stdin", "--raw", url) //nolint:gosec | ||
| cmd.Stdin = strings.NewReader(jeprof) | ||
| stdout, err := cmd.StdoutPipe() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| stderr, err := cmd.StderrPipe() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| err = cmd.Start() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| data, err := io.ReadAll(stdout) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| errMsg, err := io.ReadAll(stderr) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| err = cmd.Wait() | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to fetch tikv heap profile: %s", errMsg) | ||
| } | ||
| return data, nil | ||
| } | ||
|
|
||
| func ConvertToSVG(data []byte) ([]byte, error) { | ||
| f, err := os.CreateTemp("", "prof") | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer os.Remove(f.Name()) | ||
| _, err = f.Write(data) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| cmd := exec.Command("perl", "/dev/stdin", "--dot", f.Name()) //nolint:gosec | ||
| cmd.Stdin = strings.NewReader(jeprof) | ||
| dotContent, err := cmd.Output() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| svgContent, err := convertDotToSVG(dotContent) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return svgContent, nil | ||
| } | ||
|
|
||
| func convertDotToSVG(dotData []byte) ([]byte, error) { | ||
| g := graphviz.New() | ||
| graph, err := graphviz.ParseBytes(dotData) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| buf := bytes.NewBuffer(nil) | ||
| err = g.Render(graph, graphviz.SVG, buf) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return buf.Bytes(), nil | ||
| } | ||
|
|
||
| func ConvertToText(data []byte) ([]byte, error) { | ||
| f, err := os.CreateTemp("", "prof") | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer os.Remove(f.Name()) | ||
| _, err = f.Write(data) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // Brendan Gregg's collapsed stack format | ||
| cmd := exec.Command("perl", "/dev/stdin", "--collapsed", f.Name()) //nolint:gosec | ||
| cmd.Stdin = strings.NewReader(jeprof) | ||
| textContent, err := cmd.Output() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return textContent, nil | ||
| } |
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