pprof_rusage.go

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