File: uintptrescapes2.go

package info (click to toggle)
golang-1.8 1.8.1-1%2Bdeb9u1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 76,544 kB
  • sloc: asm: 55,864; ansic: 7,960; sh: 1,576; perl: 1,139; xml: 623; python: 286; javascript: 231; makefile: 109; cpp: 22; f90: 8; awk: 7
file content (31 lines) | stat: -rw-r--r-- 880 bytes parent folder | download | duplicates (3)
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
29
30
31
// errorcheck -0 -m -live

// Copyright 2016 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 uintptrescapes functions.

package p

import (
	"unsafe"
)

//go:uintptrescapes
//go:noinline
func F1(a uintptr) {} // ERROR "escaping uintptr"

//go:uintptrescapes
//go:noinline
func F2(a ...uintptr) {} // ERROR "escaping ...uintptr" "a does not escape"

func G() {
	var t int                       // ERROR "moved to heap"
	F1(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to F1: .?autotmp" "&t escapes to heap"
}

func H() {
	var v int                                // ERROR "moved to heap"
	F2(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to newobject: .?autotmp" "live at call to F2: .?autotmp" "escapes to heap"
}