test: issue16016: use fewer goroutines for gccgo

For https://gcc.gnu.org/PR114453

Change-Id: If41d9fca6288b18ed47b0f21ff224c74ddb34958
Reviewed-on: https://go-review.googlesource.com/c/go/+/574536
Reviewed-by: Than McIntosh <thanm@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

diff --git a/test/fixedbugs/issue16016.go b/test/fixedbugs/issue16016.go
index e738e1dba0e99881486f27c10155c7c99d46a7bb..b1947f5548de274b2f3cef56ad02a5281422298c 100644 (file)
--- a/test/fixedbugs/issue16016.go
+++ b/test/fixedbugs/issue16016.go
@@ -6,7 +6,10 @@
 
 package main
 
-import "time"
+import (
+       "runtime"
+       "time"
+)
 
 type T struct{}
 
@@ -24,8 +27,19 @@ type Q interface {
 }
 
 func main() {
+       var count = 10000
+       if runtime.Compiler == "gccgo" {
+               // On targets without split-stack libgo allocates
+               // a large stack for each goroutine. On 32-bit
+               // systems this test can run out of memory.
+               const intSize = 32 << (^uint(0) >> 63) // 32 or 64
+               if intSize < 64 {
+                       count = 100
+               }
+       }
+
        var q Q = &R{&T{}}
-       for i := 0; i < 10000; i++ {
+       for i := 0; i < count; i++ {
                go func() {
                        defer q.Foo([]interface{}{"meow"})
                        time.Sleep(100 * time.Millisecond)