File: live_syscall.go

package info (click to toggle)
golang 2%3A1.6-1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 60,232 kB
  • ctags: 121,778
  • sloc: asm: 36,876; ansic: 7,370; sh: 1,459; perl: 1,120; xml: 623; python: 286; yacc: 155; makefile: 89; cpp: 22; awk: 7
file content (28 lines) | stat: -rw-r--r-- 662 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
// errorcheck -0 -m -live

// +build !windows

// 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.

// Test escape analysis and liveness inferred for syscall.Syscall-like functions.

package p

import (
	"syscall"
	"unsafe"
)

func f(uintptr) // ERROR "f assuming arg#1 is unsafe uintptr"

func g() {
	var t int
	f(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to f: autotmp" "g &t does not escape"
}

func h() {
	var v int
	syscall.Syscall(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to Syscall: autotmp" "h &v does not escape"
}