go live_uintptrkeepalive 源码
golang live_uintptrkeepalive 代码
文件路径：/test/live_uintptrkeepalive.go
// errorcheck -0 -m -live -std
// +build !windows,!js
// 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 uintptrkeepalive functions.
//
// This behavior is enabled automatically for function declarations with no
// bodies (assembly, linkname), as well as explicitly on complete functions
// with //go:uintptrkeepalive.
//
// This is most important for syscall.Syscall (and similar functions), so we
// test it explicitly.
package p
import (
"syscall"
"unsafe"
)
func implicit(uintptr) // ERROR "assuming arg#1 is unsafe uintptr"
//go:uintptrkeepalive
//go:nosplit
func explicit(uintptr) {
}
func autotmpImplicit() { // ERROR "can inline autotmpImplicit"
var t int
implicit(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to implicit: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func autotmpExplicit() { // ERROR "can inline autotmpExplicit"
var t int
explicit(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to explicit: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func autotmpSyscall() { // ERROR "can inline autotmpSyscall"
var v int
syscall.Syscall(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to Syscall: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func localImplicit() { // ERROR "can inline localImplicit"
var t int
p := unsafe.Pointer(&t)
implicit(uintptr(p)) // ERROR "live at call to implicit: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func localExplicit() { // ERROR "can inline localExplicit"
var t int
p := unsafe.Pointer(&t)
explicit(uintptr(p)) // ERROR "live at call to explicit: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func localSyscall() { // ERROR "can inline localSyscall"
var v int
p := unsafe.Pointer(&v)
syscall.Syscall(0, 1, uintptr(p), 2) // ERROR "live at call to Syscall: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
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