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master
test/fixedbugs/issue29362.go
42 строки
879 B
Keith Randall
runtime: add test for go function argument scanning
03 янв 2019, 23:17
03 янв 2019, 23:17
af43203
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// 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) } }