Add //pkg/sentry/seccheck.

This defines common infrastructure for dynamically-configured security checks,
including an example usage in the clone(2) path.

PiperOrigin-RevId: 394797270

1 files changed, 39 insertions, 0 deletions

diff --git a/pkg/sentry/seccheck/task.go b/pkg/sentry/seccheck/task.go
new file mode 100644
index 000000000..1dee33203
--- /dev/null
+++ b/pkg/sentry/seccheck/task.go
@@ -0,0 +1,39 @@
+// Copyright 2021 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package seccheck
+
+import (
+	ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time"
+)
+
+// TaskInfo contains information unambiguously identifying a single thread
+// and/or its containing process.
+//
+// +fieldenum Task
+type TaskInfo struct {
+	// ThreadID is the thread's ID in the root PID namespace.
+	ThreadID int32
+
+	// ThreadStartTime is the thread's CLOCK_REALTIME start time.
+	ThreadStartTime ktime.Time
+
+	// ThreadGroupID is the thread's group leader's ID in the root PID
+	// namespace.
+	ThreadGroupID int32
+
+	// ThreadGroupStartTime is the thread's group leader's CLOCK_REALTIME start
+	// time.
+	ThreadGroupStartTime ktime.Time
+}