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A new comment directive //go:noescape instructs the compiler that the following external (no body) func declaration should be treated as if none of its arguments escape to the heap. Fixes #4099. R=golang-dev, dave, minux.ma, daniel.morsing, remyoudompheng, adg, agl, iant CC=golang-dev https://golang.org/cl/7289048
27 lines
538 B
Go
27 lines
538 B
Go
// errorcheck -0 -m
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// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Check go:noescape annotations.
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package p
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// The noescape comment only applies to the next func,
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// which must not have a body.
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//go:noescape
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func F1([]byte)
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func F2([]byte)
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func G() {
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var buf1 [10]byte
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F1(buf1[:]) // ERROR "buf1 does not escape"
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var buf2 [10]byte // ERROR "moved to heap: buf2"
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F2(buf2[:]) // ERROR "buf2 escapes to heap"
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}
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