viewer.go

Documentation: cmd/trace/v2

     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  package trace
     6  
     7  import (
     8  	"fmt"
     9  	"internal/trace"
    10  	"internal/trace/traceviewer"
    11  	tracev2 "internal/trace/v2"
    12  	"time"
    13  )
    14  
    15  // viewerFrames returns the frames of the stack of ev. The given frame slice is
    16  // used to store the frames to reduce allocations.
    17  func viewerFrames(stk tracev2.Stack) []*trace.Frame {
    18  	var frames []*trace.Frame
    19  	stk.Frames(func(f tracev2.StackFrame) bool {
    20  		frames = append(frames, &trace.Frame{
    21  			PC:   f.PC,
    22  			Fn:   f.Func,
    23  			File: f.File,
    24  			Line: int(f.Line),
    25  		})
    26  		return true
    27  	})
    28  	return frames
    29  }
    30  
    31  func viewerGState(state tracev2.GoState, inMarkAssist bool) traceviewer.GState {
    32  	switch state {
    33  	case tracev2.GoUndetermined:
    34  		return traceviewer.GDead
    35  	case tracev2.GoNotExist:
    36  		return traceviewer.GDead
    37  	case tracev2.GoRunnable:
    38  		return traceviewer.GRunnable
    39  	case tracev2.GoRunning:
    40  		return traceviewer.GRunning
    41  	case tracev2.GoWaiting:
    42  		if inMarkAssist {
    43  			return traceviewer.GWaitingGC
    44  		}
    45  		return traceviewer.GWaiting
    46  	case tracev2.GoSyscall:
    47  		// N.B. A goroutine in a syscall is considered "executing" (state.Executing() == true).
    48  		return traceviewer.GRunning
    49  	default:
    50  		panic(fmt.Sprintf("unknown GoState: %s", state.String()))
    51  	}
    52  }
    53  
    54  func viewerTime(t time.Duration) float64 {
    55  	return float64(t) / float64(time.Microsecond)
    56  }
    57
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