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go/test/fixedbugs/issue10925.go
David Chase b19ec6842d cmd/internal/gc: make indirect calls properly escape-y
Indirect function and method calls should leak everything,
but they didn't.

This fix had no particular effect on the cost of running the
compiler on html/template/*.go and added a single new "escape"
to the standard library:

    syscall/syscall_unix.go:85: &b[0] escapes to heap
in
	if errno := m.munmap(uintptr(unsafe.Pointer(&b[0])),
	                     uintptr(len(b))); errno != nil {

Added specific escape testing to escape_calls.go
(and verified that it fails without this patch)

I also did a little code cleanup around the changes in esc.c.

Fixes #10925

Change-Id: I9984b701621ad4c49caed35b01e359295c210033
Reviewed-on: https://go-review.googlesource.com/10295
Reviewed-by: Russ Cox <rsc@golang.org>
2015-05-22 01:36:11 +00:00

24 lines
588 B
Go

// run
// 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.
package main
import "fmt"
func prototype(xyz []string) {}
func main() {
var got [][]string
f := prototype
f = func(ss []string) { got = append(got, ss) }
for _, s := range []string{"one", "two", "three"} {
f([]string{s})
}
if got[0][0] != "one" || got[1][0] != "two" || got[2][0] != "three" {
// Bug's wrong output was [[three] [three] [three]]
fmt.Println("Expected [[one] [two] [three]], got", got)
}
}