package raw

Import Path
	internal/trace/v2/raw (on go.dev)

Dependency Relation
	imports 9 packages, and imported by 2 packages


Involved Source Files

	
		Package raw provides an interface to interpret and emit Go execution traces.
		It can interpret and emit execution traces in its wire format as well as a
		bespoke but simple text format.
		
		The readers and writers in this package perform no validation on or ordering of
		the input, and so are generally unsuitable for analysis. However, they're very
		useful for testing and debugging the tracer in the runtime and more sophisticated
		trace parsers.
		
		# Text format specification
		
		The trace text format produced and consumed by this package is a line-oriented
		format.
		
		The first line in each text trace is the header line.
		
			Trace Go1.XX
		
		Following that is a series of event lines. Each event begins with an
		event name, followed by zero or more named unsigned integer arguments.
		Names are separated from their integer values by an '=' sign. Names can
		consist of any UTF-8 character except '='.
		
		For example:
		
			EventName arg1=23 arg2=55 arg3=53
		
		Any amount of whitespace is allowed to separate each token. Whitespace
		is identified via unicode.IsSpace.
		
		Some events have additional data on following lines. There are two such
		special cases.
		
		The first special case consists of events with trailing byte-oriented data.
		The trailer begins on the following line from the event. That line consists
		of a single argument 'data' and a Go-quoted string representing the byte data
		within. Note: an explicit argument for the length is elided, because it's
		just the length of the unquoted string.
		
		For example:
		
			String id=5
				data="hello world\x00"
		
		These events are identified in their spec by the HasData flag.
		
		The second special case consists of stack events. These events are identified
		by the IsStack flag. These events also have a trailing unsigned integer argument
		describing the number of stack frame descriptors that follow. Each stack frame
		descriptor is on its own line following the event, consisting of four signed
		integer arguments: the PC, an integer describing the function name, an integer
		describing the file name, and the line number in that file that function was at
		at the time the stack trace was taken.
		
		For example:
		
			Stack id=5 n=2
				pc=1241251 func=3 file=6 line=124
				pc=7534345 func=6 file=3 line=64

	    event.go
	    reader.go
	    textreader.go
	    textwriter.go
	    writer.go


Package-Level Type Names (total 5)


	/* sort by:  |  */
	
		Event is a simple representation of a trace event.
		
		Note that this typically includes much more than just
		timestamped events, and it also represents parts of the
		trace format's framing. (But not interpreted.)

		
			Args []uint64
			Data []byte
			Ev event.Type
			Version version.Version
		
			
				String returns the canonical string representation of the event.
				
				This format is the same format that is parsed by the TextReader
				and emitted by the TextWriter.

		
			*Event : expvar.Var
			*Event : fmt.Stringer
		
			func (*Reader).ReadEvent() (Event, error)
			func (*TextReader).ReadEvent() (Event, error)
		
			func (*TextWriter).WriteEvent(e Event) error
			func (*Writer).WriteEvent(e Event) error


	
		Reader parses trace bytes with only very basic validation
		into an event stream.

		
			
				ReadEvent reads and returns the next trace event in the byte stream.

			
				Version returns the version of the trace that we're reading.

		
			func NewReader(r io.Reader) (*Reader, error)


	
		TextReader parses a text format trace with only very basic validation
		into an event stream.

		
			
				ReadEvent reads and returns the next trace event in the text stream.

			
				Version returns the version of the trace that we're reading.

		
			func NewTextReader(r io.Reader) (*TextReader, error)


	
		TextWriter emits the text format of a trace.

		
			
				WriteEvent writes a single event to the stream.

		
			func NewTextWriter(w io.Writer, v version.Version) (*TextWriter, error)


	
		Writer emits the wire format of a trace.
		
		It may not produce a byte-for-byte compatible trace from what is
		produced by the runtime, because it may be missing extra padding
		in the LEB128 encoding that the runtime adds but isn't necessary
		when you know the data up-front.

		
			
				WriteEvent writes a single event to the trace wire format stream.

		
			func NewWriter(w io.Writer, v version.Version) (*Writer, error)




Package-Level Functions (total 4)


	
		NewReader creates a new reader for the trace wire format.


	
		NewTextReader creates a new reader for the trace text format.


	
		NewTextWriter creates a new write for the trace text format.


	
		NewWriter creates a new byte format writer.