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author | Keith Randall <keithr@alum.mit.edu> | 2019-01-03 11:03:19 -0800 |
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committer | Katie Hockman <katie@golang.org> | 2019-01-04 20:48:27 +0000 |
commit | 84f1e9214470af0998b7774f8abc995c3bd06cbb (patch) | |
tree | 4184b04fe80cafbd4bbced9d89eb3e3059c4cde7 | |
parent | c36b5322a7bcb268fa7a4b5ef67ce807745745a9 (diff) | |
download | go-84f1e9214470af0998b7774f8abc995c3bd06cbb.tar.gz go-84f1e9214470af0998b7774f8abc995c3bd06cbb.zip |
[release-branch.go1.11] runtime: add test for go function argument scanning
Derived from Naoki's reproducer.
Update #29565
Change-Id: I1cbd33b38a2f74905dbc22c5ecbad4a87a24bdd1
Reviewed-on: https://go-review.googlesource.com/c/156122
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
(cherry picked from commit af4320350b3a156de0d1cfa9845ab1e48dcbfefa)
Reviewed-on: https://go-review.googlesource.com/c/156358
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
-rw-r--r-- | test/fixedbugs/issue29362.go | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/test/fixedbugs/issue29362.go b/test/fixedbugs/issue29362.go new file mode 100644 index 0000000000..a8bd607c4a --- /dev/null +++ b/test/fixedbugs/issue29362.go @@ -0,0 +1,42 @@ +// run + +// Copyright 2018 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. + +// Verify that we don't consider a Go'd function's +// arguments as pointers when they aren't. + +package main + +import ( + "unsafe" +) + +var badPtr uintptr + +var sink []byte + +func init() { + // Allocate large enough to use largeAlloc. + b := make([]byte, 1<<16-1) + sink = b // force heap allocation + // Any space between the object and the end of page is invalid to point to. + badPtr = uintptr(unsafe.Pointer(&b[len(b)-1])) + 1 +} + +var throttle = make(chan struct{}, 10) + +func noPointerArgs(a, b, c, d uintptr) { + sink = make([]byte, 4096) + <-throttle +} + +func main() { + const N = 1000 + for i := 0; i < N; i++ { + throttle <- struct{}{} + go noPointerArgs(badPtr, badPtr, badPtr, badPtr) + sink = make([]byte, 4096) + } +} |