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runtime: make TestGcSys actually test something 

The workthegc function was being inlined, and the slice did not
escape, so there was no memory allocation. Use a sink variable to
force memory allocation, at least for now.

Fixes #23343

Change-Id: I02f4618e343c8b6cb552cb4e9f272e112785f7cf
Reviewed-on: https://go-review.googlesource.com/122576
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Ian Lance Taylor 2018-07-06 22:57:35 -07:00 committed by Brad Fitzpatrick
parent 68527ff4fb
commit 0a51940165
1 changed files with 4 additions and 1 deletions
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5
src/runtime/testdata/testprog/gc.go vendored
View File

@ -48,8 +48,11 @@ func GCSys() {
fmt.Printf("OK\n") fmt.Printf("OK\n")
} }
var sink []byte
func workthegc() []byte { func workthegc() []byte {
return make([]byte, 1029) sink = make([]byte, 1029)
return sink
} }
func GCFairness() { func GCFairness() {