| // 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) |
| } |
| } |
