mirror of
https://github.com/golang/go
synced 2024-11-24 11:40:16 -07:00
cb05a0aa6a
Now that CaptureVars is gone, we can remove the extra code in escape analysis that only served to appease toolstash -cmp. Change-Id: I8c811834f3d966e76702e2d362e3de414c94bea6 Reviewed-on: https://go-review.googlesource.com/c/go/+/281544 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Go Bot <gobot@golang.org> Trust: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
72 lines
1.6 KiB
Go
72 lines
1.6 KiB
Go
// run
|
|
|
|
// Copyright 2009 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 the cap predeclared function applied to channels.
|
|
|
|
package main
|
|
|
|
import (
|
|
"strings"
|
|
"unsafe"
|
|
)
|
|
|
|
type T chan int
|
|
|
|
const ptrSize = unsafe.Sizeof((*byte)(nil))
|
|
|
|
func main() {
|
|
c := make(T, 10)
|
|
if len(c) != 0 || cap(c) != 10 {
|
|
println("chan len/cap ", len(c), cap(c), " want 0 10")
|
|
panic("fail")
|
|
}
|
|
|
|
for i := 0; i < 3; i++ {
|
|
c <- i
|
|
}
|
|
if len(c) != 3 || cap(c) != 10 {
|
|
println("chan len/cap ", len(c), cap(c), " want 3 10")
|
|
panic("fail")
|
|
}
|
|
|
|
c = make(T)
|
|
if len(c) != 0 || cap(c) != 0 {
|
|
println("chan len/cap ", len(c), cap(c), " want 0 0")
|
|
panic("fail")
|
|
}
|
|
|
|
n := -1
|
|
shouldPanic("makechan: size out of range", func() { _ = make(T, n) })
|
|
shouldPanic("makechan: size out of range", func() { _ = make(T, int64(n)) })
|
|
if ptrSize == 8 {
|
|
// Test mem > maxAlloc
|
|
var n2 int64 = 1 << 59
|
|
shouldPanic("makechan: size out of range", func() { _ = make(T, int(n2)) })
|
|
// Test elem.size*cap overflow
|
|
n2 = 1<<63 - 1
|
|
shouldPanic("makechan: size out of range", func() { _ = make(T, int(n2)) })
|
|
} else {
|
|
n = 1<<31 - 1
|
|
shouldPanic("makechan: size out of range", func() { _ = make(T, n) })
|
|
shouldPanic("makechan: size out of range", func() { _ = make(T, int64(n)) })
|
|
}
|
|
}
|
|
|
|
func shouldPanic(str string, f func()) {
|
|
defer func() {
|
|
err := recover()
|
|
if err == nil {
|
|
panic("did not panic")
|
|
}
|
|
s := err.(error).Error()
|
|
if !strings.Contains(s, str) {
|
|
panic("got panic " + s + ", want " + str)
|
|
}
|
|
}()
|
|
|
|
f()
|
|
}
|