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Diffstat (limited to 'test/fixedbugs/issue10353.go')
-rw-r--r-- | test/fixedbugs/issue10353.go | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/test/fixedbugs/issue10353.go b/test/fixedbugs/issue10353.go new file mode 100644 index 0000000..87771d4 --- /dev/null +++ b/test/fixedbugs/issue10353.go @@ -0,0 +1,49 @@ +// 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. + +// issue 10253: cmd/gc: incorrect escape analysis of closures +// Partial call x.foo was not promoted to heap. + +package main + +func main() { + c := make(chan bool) + // Create a new goroutine to get a default-size stack segment. + go func() { + x := new(X) + clos(x.foo)() + c <- true + }() + <-c +} + +type X int + +func (x *X) foo() { +} + +func clos(x func()) func() { + f := func() { + print("") + x() // This statement crashed, because the partial call was allocated on the old stack. + } + // Grow stack so that partial call x becomes invalid if allocated on stack. + growstack(10000) + c := make(chan bool) + // Spoil the previous stack segment. + go func() { + c <- true + }() + <-c + return f +} + +func growstack(x int) { + if x == 0 { + return + } + growstack(x - 1) +} |