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Source file src/runtime/testdata/testprog/syscall_windows.go

Documentation: runtime/testdata/testprog

  // Copyright 2015 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  package main
  
  import (
  	"internal/syscall/windows"
  	"runtime"
  	"sync"
  	"syscall"
  	"unsafe"
  )
  
  func init() {
  	register("RaiseException", RaiseException)
  	register("ZeroDivisionException", ZeroDivisionException)
  	register("StackMemory", StackMemory)
  }
  
  func RaiseException() {
  	const EXCEPTION_NONCONTINUABLE = 1
  	mod := syscall.MustLoadDLL("kernel32.dll")
  	proc := mod.MustFindProc("RaiseException")
  	proc.Call(0xbad, EXCEPTION_NONCONTINUABLE, 0, 0)
  	println("RaiseException should not return")
  }
  
  func ZeroDivisionException() {
  	x := 1
  	y := 0
  	z := x / y
  	println(z)
  }
  
  func getPagefileUsage() (uintptr, error) {
  	p, err := syscall.GetCurrentProcess()
  	if err != nil {
  		return 0, err
  	}
  	var m windows.PROCESS_MEMORY_COUNTERS
  	err = windows.GetProcessMemoryInfo(p, &m, uint32(unsafe.Sizeof(m)))
  	if err != nil {
  		return 0, err
  	}
  	return m.PagefileUsage, nil
  }
  
  func StackMemory() {
  	mem1, err := getPagefileUsage()
  	if err != nil {
  		panic(err)
  	}
  	const threadCount = 100
  	var wg sync.WaitGroup
  	for i := 0; i < threadCount; i++ {
  		wg.Add(1)
  		go func() {
  			runtime.LockOSThread()
  			wg.Done()
  			select {}
  		}()
  	}
  	wg.Wait()
  	mem2, err := getPagefileUsage()
  	if err != nil {
  		panic(err)
  	}
  	print((mem2 - mem1) / threadCount)
  }
  

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