Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 57 insertions, 0 deletions

diff --git a/src/runtime/testdata/testprogcgo/stack_windows.go b/src/runtime/testdata/testprogcgo/stack_windows.go
new file mode 100644
index 0000000..0be1126
--- /dev/null
+++ b/src/runtime/testdata/testprogcgo/stack_windows.go
@@ -0,0 +1,57 @@
+// Copyright 2015 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.
+
+package main
+
+import "C"
+import (
+	"internal/syscall/windows"
+	"runtime"
+	"sync"
+	"syscall"
+	"unsafe"
+)
+
+func init() {
+	register("StackMemory", StackMemory)
+}
+
+func getPagefileUsage() (uintptr, error) {
+	p, err := syscall.GetCurrentProcess()
+	if err != nil {
+		return 0, err
+	}
+	var m windows.PROCESS_MEMORY_COUNTERS
+	err = windows.GetProcessMemoryInfo(p, &m, uint32(unsafe.Sizeof(m)))
+	if err != nil {
+		return 0, err
+	}
+	return m.PagefileUsage, nil
+}
+
+func StackMemory() {
+	mem1, err := getPagefileUsage()
+	if err != nil {
+		panic(err)
+	}
+	const threadCount = 100
+	var wg sync.WaitGroup
+	for i := 0; i < threadCount; i++ {
+		wg.Add(1)
+		go func() {
+			runtime.LockOSThread()
+			wg.Done()
+			select {}
+		}()
+	}
+	wg.Wait()
+	mem2, err := getPagefileUsage()
+	if err != nil {
+		panic(err)
+	}
+	// assumes that this process creates 1 thread for each
+	// thread locked goroutine plus extra 5 threads
+	// like sysmon and others
+	print((mem2 - mem1) / (threadCount + 5))
+}