pkg/host: move from host

1 files changed, 74 insertions, 0 deletions

diff --git a/pkg/host/host_test.go b/pkg/host/host_test.go
new file mode 100644
index 000000000..9b44d8e36
--- /dev/null
+++ b/pkg/host/host_test.go
@@ -0,0 +1,74 @@
+// Copyright 2015 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package host
+
+import (
+	"syscall"
+	"testing"
+
+	"github.com/google/syzkaller/sys"
+)
+
+func TestLog(t *testing.T) {
+	t.Parallel()
+	// Dump for manual inspection.
+	supp, err := DetectSupportedSyscalls()
+	if err != nil {
+		t.Skipf("skipping: %v", err)
+	}
+	t.Logf("unsupported:")
+	for _, c := range sys.Calls {
+		s, ok := supp[c]
+		if ok && !s {
+			t.Fatalf("map contains false value")
+		}
+		if !s {
+			t.Logf("\t%v", c.Name)
+		}
+	}
+	trans := sys.TransitivelyEnabledCalls(supp)
+	t.Logf("transitively unsupported:")
+	for _, c := range sys.Calls {
+		s, ok := trans[c]
+		if ok && !s {
+			t.Fatalf("map contains false value")
+		}
+		if !s && supp[c] {
+			t.Logf("\t%v", c.Name)
+		}
+	}
+}
+
+func TestSupportedSyscalls(t *testing.T) {
+	t.Parallel()
+	supp, err := DetectSupportedSyscalls()
+	if err != nil {
+		t.Skipf("skipping: %v", err)
+	}
+	// These are safe to execute with invalid arguments.
+	safe := []string{
+		"memfd_create",
+		"sendfile",
+		"bpf$MAP_CREATE",
+		"open",
+		"openat",
+		"read",
+		"write",
+		"stat",
+	}
+	for _, name := range safe {
+		c := sys.CallMap[name]
+		if c == nil {
+			t.Fatalf("can't find syscall '%v'", name)
+		}
+		a := ^uintptr(0) - 4097 // hopefully invalid
+		_, _, err := syscall.Syscall6(uintptr(c.NR), a, a, a, a, a, a)
+		if err == 0 {
+			t.Fatalf("%v did not fail", name)
+		}
+		if ok := err != syscall.ENOSYS; ok != supp[c] {
+			t.Fatalf("syscall %v: perse=%v kallsyms=%v", name, ok, supp[c])
+		}
+	}
+}