pprof_rusage.go

Documentation: runtime/pprof

     1  // Copyright 2019 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  //go:build darwin || linux
     6  // +build darwin linux
     7  
     8  package pprof
     9  
    10  import (
    11  	"fmt"
    12  	"io"
    13  	"runtime"
    14  	"syscall"
    15  )
    16  
    17  // Adds MaxRSS to platforms that are supported.
    18  func addMaxRSS(w io.Writer) {
    19  	var rssToBytes uintptr
    20  	switch runtime.GOOS {
    21  	case "linux", "android":
    22  		rssToBytes = 1024
    23  	case "darwin", "ios":
    24  		rssToBytes = 1
    25  	default:
    26  		panic("unsupported OS")
    27  	}
    28  
    29  	var rusage syscall.Rusage
    30  	syscall.Getrusage(0, &rusage)
    31  	fmt.Fprintf(w, "# MaxRSS = %d\n", uintptr(rusage.Maxrss)*rssToBytes)
    32  }
    33
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