github.com/twelsh-aw/go/src@v0.0.0-20230516233729-a56fe86a7c81/runtime/pprof/pprof_rusage.go (about)

     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 unix
     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 "aix", "android", "dragonfly", "freebsd", "linux", "netbsd", "openbsd":
    21  		rssToBytes = 1024
    22  	case "darwin", "ios":
    23  		rssToBytes = 1
    24  	case "illumos", "solaris":
    25  		rssToBytes = uintptr(syscall.Getpagesize())
    26  	default:
    27  		panic("unsupported OS")
    28  	}
    29  
    30  	var rusage syscall.Rusage
    31  	err := syscall.Getrusage(syscall.RUSAGE_SELF, &rusage)
    32  	if err == nil {
    33  		fmt.Fprintf(w, "# MaxRSS = %d\n", uintptr(rusage.Maxrss)*rssToBytes)
    34  	}
    35  }