src/tests/oom/oom_test.go

package main

import (
	"os"
	"path/filepath"
	"testing"

	"fuchsia.googlesource.com/testing/qemu"
)

func zbiPath(t *testing.T) string {
	ex, err := os.Executable()
	if err != nil {
		t.Fatal(err)
		return ""
	}
	exPath := filepath.Dir(ex)
	return filepath.Join(exPath, "../fuchsia.zbi")
}

func TestOOM(t *testing.T) {
	distro, err := qemu.Unpack()
	if err != nil {
		t.Fatal(err)
	}
	defer distro.Delete()
	arch, err := distro.TargetCPU()
	if err != nil {
		t.Fatal(err)
	}

	i := distro.Create(qemu.Params{
		Arch: arch,
		ZBI:  zbiPath(t),
	})

	i.Start()
	if err != nil {
		t.Fatal(err)
	}
	defer i.Kill()

	// Ensure the OOM thread was enabled in the kernel.
	i.WaitForLogMessage("OOM: started thread")

	// Make sure the shell is ready to accept commands over serial.
	i.WaitForLogMessage("vc: Successfully attached")

	// Trigger a simulated OOM.
	i.RunCommand("k oom lowmem")

	// Make sure the file system is notified and unmounts.
	i.WaitForLogMessage("devcoordinator: Successfully waited for VFS exit completion")

	// Ensure the OOM thread reboots the target.
	i.WaitForLogMessage("OOM: rebooting")
}