github.com/cockroachdb/cockroachdb-parser@v0.23.3-0.20240213214944-911057d40c9a/pkg/util/smalltrace.go (about)

     1  // Copyright 2016 The Cockroach Authors.
     2  //
     3  // Use of this software is governed by the Business Source License
     4  // included in the file licenses/BSL.txt.
     5  //
     6  // As of the Change Date specified in that file, in accordance with
     7  // the Business Source License, use of this software will be governed
     8  // by the Apache License, Version 2.0, included in the file
     9  // licenses/APL.txt.
    10  
    11  package util
    12  
    13  import (
    14  	"runtime"
    15  	"strings"
    16  
    17  	"github.com/cockroachdb/redact"
    18  )
    19  
    20  var prefix = func() string {
    21  	result := "github.com/cockroachdb/cockroachdb-parser/pkg/"
    22  	if runtime.Compiler == "gccgo" {
    23  		result = strings.Replace(result, ".", "_", -1)
    24  		result = strings.Replace(result, "/", "_", -1)
    25  	}
    26  	return result
    27  }()
    28  
    29  // GetSmallTrace returns a comma-separated string containing the top
    30  // 5 callers from a given skip level.
    31  func GetSmallTrace(skip int) redact.RedactableString {
    32  	var pcs [5]uintptr
    33  	runtime.Callers(skip, pcs[:])
    34  	frames := runtime.CallersFrames(pcs[:])
    35  	var callers redact.StringBuilder
    36  
    37  	var callerPrefix redact.RedactableString
    38  	for {
    39  		f, more := frames.Next()
    40  		function := strings.TrimPrefix(f.Function, prefix)
    41  		file := f.File
    42  		if index := strings.LastIndexByte(file, '/'); index >= 0 {
    43  			file = file[index+1:]
    44  		}
    45  		callers.Printf("%s%s:%d:%s", callerPrefix, redact.SafeString(file), f.Line, redact.SafeString(function))
    46  		callerPrefix = ","
    47  		if !more {
    48  			break
    49  		}
    50  	}
    51  
    52  	return callers.RedactableString()
    53  }