event.go

Documentation: golang.org/x/exp/trace/internal/raw

     1  // Copyright 2023 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // Code generated by "gen.bash" from internal/trace/v2; DO NOT EDIT.
     6  
     7  //go:build go1.21
     8  
     9  package raw
    10  
    11  import (
    12  	"strconv"
    13  	"strings"
    14  
    15  	"golang.org/x/exp/trace/internal/event"
    16  	"golang.org/x/exp/trace/internal/version"
    17  )
    18  
    19  // Event is a simple representation of a trace event.
    20  //
    21  // Note that this typically includes much more than just
    22  // timestamped events, and it also represents parts of the
    23  // trace format's framing. (But not interpreted.)
    24  type Event struct {
    25  	Version version.Version
    26  	Ev      event.Type
    27  	Args    []uint64
    28  	Data    []byte
    29  }
    30  
    31  // String returns the canonical string representation of the event.
    32  //
    33  // This format is the same format that is parsed by the TextReader
    34  // and emitted by the TextWriter.
    35  func (e *Event) String() string {
    36  	spec := e.Version.Specs()[e.Ev]
    37  
    38  	var s strings.Builder
    39  	s.WriteString(spec.Name)
    40  	for i := range spec.Args {
    41  		s.WriteString(" ")
    42  		s.WriteString(spec.Args[i])
    43  		s.WriteString("=")
    44  		s.WriteString(strconv.FormatUint(e.Args[i], 10))
    45  	}
    46  	if spec.IsStack {
    47  		frames := e.Args[len(spec.Args):]
    48  		for i := 0; i < len(frames); i++ {
    49  			if i%4 == 0 {
    50  				s.WriteString("\n\t")
    51  			} else {
    52  				s.WriteString(" ")
    53  			}
    54  			s.WriteString(frameFields[i%4])
    55  			s.WriteString("=")
    56  			s.WriteString(strconv.FormatUint(frames[i], 10))
    57  		}
    58  	}
    59  	if e.Data != nil {
    60  		s.WriteString("\n\tdata=")
    61  		s.WriteString(strconv.Quote(string(e.Data)))
    62  	}
    63  	return s.String()
    64  }
    65
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