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https://github.com/golang/go
synced 2024-10-04 22:21:22 -06:00
dc370995a8
Cgo writes C function declarations pretending every arg is a pointer. If the C function is deferred, it does not inhibit stack copying on split. The stack copying code believes the C declaration, possibly misinterpreting integers as pointers. Probably the right fix for Go 1.3 is to make deferred C functions inhibit stack copying. For Go 1.4 and beyond we probably need to make cgo generate Go code for 6g here, not C code for 6c. Update #7695 LGTM=khr R=khr CC=golang-codereviews https://golang.org/cl/83820043
28 lines
509 B
Go
28 lines
509 B
Go
// Copyright 2014 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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// Demo of deferred C function with untrue prototype
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// breaking stack copying. See golang.org/issue/7695.
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package cgotest
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import (
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"testing"
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"./backdoor"
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)
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func TestIssue7695(t *testing.T) {
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defer backdoor.Issue7695(1, 0, 2, 0, 0, 3, 0, 4)
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recurse(100)
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}
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func recurse(n int) {
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var x [128]int
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n += x[0]
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if n > 0 {
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recurse(n - 1)
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}
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}
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