mirror of
https://github.com/golang/go
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2c95e3a6a8
This CL changes "T literal.M" error message to "T{...}.M". It's clearer
expression and focusing user on actual issue.
Updates #38745
Change-Id: I84b455a86742f37e0bde5bf390aa02984eecc3c9
Reviewed-on: https://go-review.googlesource.com/c/go/+/253677
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
175 lines
2.9 KiB
Go
175 lines
2.9 KiB
Go
// errorcheck -0 -m -l
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// Copyright 2015 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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// Test escape analysis with respect to field assignments.
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package escape
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var sink interface{}
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type X struct {
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p1 *int
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p2 *int
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a [2]*int
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}
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type Y struct {
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x X
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}
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func field0() {
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i := 0 // ERROR "moved to heap: i$"
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var x X
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x.p1 = &i
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sink = x.p1
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}
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func field1() {
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i := 0 // ERROR "moved to heap: i$"
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var x X
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// BAD: &i should not escape
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x.p1 = &i
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sink = x.p2
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}
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func field3() {
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i := 0 // ERROR "moved to heap: i$"
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var x X
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x.p1 = &i
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sink = x // ERROR "x escapes to heap"
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}
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func field4() {
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i := 0 // ERROR "moved to heap: i$"
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var y Y
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y.x.p1 = &i
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x := y.x
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sink = x // ERROR "x escapes to heap"
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}
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func field5() {
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i := 0 // ERROR "moved to heap: i$"
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var x X
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// BAD: &i should not escape here
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x.a[0] = &i
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sink = x.a[1]
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}
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// BAD: we are not leaking param x, only x.p2
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func field6(x *X) { // ERROR "leaking param content: x$"
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sink = x.p2
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}
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func field6a() {
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i := 0 // ERROR "moved to heap: i$"
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var x X
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// BAD: &i should not escape
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x.p1 = &i
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field6(&x)
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}
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func field7() {
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i := 0
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var y Y
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y.x.p1 = &i
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x := y.x
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var y1 Y
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y1.x = x
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_ = y1.x.p1
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}
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func field8() {
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i := 0 // ERROR "moved to heap: i$"
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var y Y
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y.x.p1 = &i
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x := y.x
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var y1 Y
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y1.x = x
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sink = y1.x.p1
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}
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func field9() {
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i := 0 // ERROR "moved to heap: i$"
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var y Y
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y.x.p1 = &i
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x := y.x
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var y1 Y
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y1.x = x
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sink = y1.x // ERROR "y1\.x escapes to heap"
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}
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func field10() {
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i := 0 // ERROR "moved to heap: i$"
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var y Y
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// BAD: &i should not escape
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y.x.p1 = &i
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x := y.x
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var y1 Y
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y1.x = x
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sink = y1.x.p2
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}
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func field11() {
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i := 0 // ERROR "moved to heap: i$"
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x := X{p1: &i}
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sink = x.p1
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}
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func field12() {
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i := 0 // ERROR "moved to heap: i$"
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// BAD: &i should not escape
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x := X{p1: &i}
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sink = x.p2
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}
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func field13() {
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i := 0 // ERROR "moved to heap: i$"
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x := &X{p1: &i} // ERROR "&X{...} does not escape$"
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sink = x.p1
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}
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func field14() {
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i := 0 // ERROR "moved to heap: i$"
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// BAD: &i should not escape
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x := &X{p1: &i} // ERROR "&X{...} does not escape$"
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sink = x.p2
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}
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func field15() {
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i := 0 // ERROR "moved to heap: i$"
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x := &X{p1: &i} // ERROR "&X{...} escapes to heap$"
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sink = x
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}
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func field16() {
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i := 0 // ERROR "moved to heap: i$"
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var x X
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// BAD: &i should not escape
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x.p1 = &i
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var iface interface{} = x // ERROR "x does not escape"
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x1 := iface.(X)
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sink = x1.p2
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}
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func field17() {
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i := 0 // ERROR "moved to heap: i$"
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var x X
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x.p1 = &i
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var iface interface{} = x // ERROR "x does not escape"
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x1 := iface.(X)
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sink = x1.p1
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}
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func field18() {
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i := 0 // ERROR "moved to heap: i$"
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var x X
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// BAD: &i should not escape
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x.p1 = &i
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var iface interface{} = x // ERROR "x does not escape"
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y, _ := iface.(Y) // Put X, but extracted Y. The cast will fail, so y is zero initialized.
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sink = y // ERROR "y escapes to heap"
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}
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