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mirror of https://github.com/DataDog/go-profiler-notes.git synced 2025-07-15 23:54:16 +02:00
Files
Felix Geisendörfer 4e4ad567df Writing
2021-04-05 16:39:12 +02:00

55 lines
885 B
Go

package main
import (
"debug/gosym"
"fmt"
"os"
"runtime"
)
func main() {
if err := run(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func run() error {
data, err := gopclntab()
if err != nil {
return fmt.Errorf("gopclntab: %w", err)
}
return debugSymtab(data)
}
type StackTrace struct {
Frames []StackFrame
}
type StackFrame struct {
PC int
Function string
File string
Line int
}
func callers() []uintptr {
pcs := make([]uintptr, 32)
n := runtime.Callers(2, pcs)
pcs = pcs[0:n]
return pcs
}
func debugSymtab(gopclntab []byte) error {
table, err := gosym.NewTable(nil, gosym.NewLineTable(gopclntab, 0))
if err != nil {
return fmt.Errorf("gosym.NewTable: %w", err)
}
for _, pc := range callers() {
file, line, fn := table.PCToLine(uint64(pc))
fmt.Printf("%x: %s() %s:%d\n", pc, fn.Name, file, line)
}
return nil
}