From c615aafa219e8d9783b9c9a25252e4973de57d4a Mon Sep 17 00:00:00 2001
From: Adin Scannell <ascannell@google.com>
Date: Mon, 20 Apr 2020 20:57:02 -0700
Subject: Add internal nogo analysis & checkescape tool.

See tools/nogo/README.md.

The checkescape tool is able to perform recursive escape analysis, using the
actual generated binary to confirm the results produced by the compiler itself.

As an initial use case, this replaces the manual escape analysis tests used for
go_marshal, and validates that the CopyIn and CopyOut paths will not require
any allocation or stack splits.

Updates #2243

PiperOrigin-RevId: 307532986
---
 tools/nogo/check/BUILD   | 12 ++++++++++++
 tools/nogo/check/main.go | 24 ++++++++++++++++++++++++
 2 files changed, 36 insertions(+)
 create mode 100644 tools/nogo/check/BUILD
 create mode 100644 tools/nogo/check/main.go

(limited to 'tools/nogo/check')

diff --git a/tools/nogo/check/BUILD b/tools/nogo/check/BUILD
new file mode 100644
index 000000000..e2d76cd5c
--- /dev/null
+++ b/tools/nogo/check/BUILD
@@ -0,0 +1,12 @@
+load("//tools:defs.bzl", "go_binary")
+
+package(licenses = ["notice"])
+
+# Note that the check binary must be public, since an aspect may be applied
+# across lots of different rules in different repositories.
+go_binary(
+    name = "check",
+    srcs = ["main.go"],
+    visibility = ["//visibility:public"],
+    deps = ["//tools/nogo"],
+)
diff --git a/tools/nogo/check/main.go b/tools/nogo/check/main.go
new file mode 100644
index 000000000..3828edf3a
--- /dev/null
+++ b/tools/nogo/check/main.go
@@ -0,0 +1,24 @@
+// Copyright 2019 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.
+
+// Binary check is the nogo entrypoint.
+package main
+
+import (
+	"gvisor.dev/gvisor/tools/nogo"
+)
+
+func main() {
+	nogo.Main()
+}
-- 
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