cmd/compile/internal/inline: score call sites exposed by inlines

[gostls13.git] / test / init1.go

diff --git a/test/init1.go b/test/init1.go
index 9ce3c12ee68f9267f4d4be3709a7fc314d7ee4ed..0803dced1c4c6b4f1b1b0e8aa500a3e0830ff383 100644 (file)
--- a/test/init1.go
+++ b/test/init1.go
@@ -1,6 +1,6 @@
-// $G $D/$F.go && $L $F.$A && ./$A.out
+// run
 
-// Copyright 2011 The Go Authors.  All rights reserved.
+// Copyright 2011 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.
 
@@ -16,22 +16,32 @@ func init() {
        c := make(chan int)
        go send(c)
        <-c
-       
-       const chunk = 1<<20
-       runtime.UpdateMemStats()
-       sys := runtime.MemStats.Sys     
-       b := make([]byte, chunk)
+
+       const N = 1000
+       const MB = 1 << 20
+       b := make([]byte, MB)
        for i := range b {
                b[i] = byte(i%10 + '0')
        }
        s := string(b)
-       for i := 0; i < 1000; i++ {
+
+       memstats := new(runtime.MemStats)
+       runtime.ReadMemStats(memstats)
+       sys, numGC := memstats.Sys, memstats.NumGC
+
+       // Generate 1,000 MB of garbage, only retaining 1 MB total.
+       for i := 0; i < N; i++ {
                x = []byte(s)
        }
-       runtime.UpdateMemStats()
-       sys1 := runtime.MemStats.Sys
-       if sys1-sys > chunk*50 {
-               println("allocated 1000 chunks of", chunk, "and used ", sys1-sys, "memory")
+
+       // Verify that the garbage collector ran by seeing if we
+       // allocated fewer than N*MB bytes from the system.
+       runtime.ReadMemStats(memstats)
+       sys1, numGC1 := memstats.Sys, memstats.NumGC
+       if sys1-sys >= N*MB || numGC1 == numGC {
+               println("allocated 1000 chunks of", MB, "and used ", sys1-sys, "memory")
+               println("numGC went", numGC, "to", numGC1)
+               panic("init1")
        }
 }
 
@@ -41,4 +51,3 @@ func send(c chan int) {
 
 func main() {
 }
-