From 63b1c736b3bbb71cc7019fddec0e706133a2f61e Mon Sep 17 00:00:00 2001
From: gVisor bot <gvisor-bot@google.com>
Date: Sat, 11 Sep 2021 18:01:51 -0700
Subject: Internal change.

PiperOrigin-RevId: 396155387
---
 test/runner/gtest/gtest.go  | 21 +++++++++++----
 test/util/BUILD             | 13 +++++++++
 test/util/benchmark_main.cc | 64 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 93 insertions(+), 5 deletions(-)
 create mode 100644 test/util/benchmark_main.cc

diff --git a/test/runner/gtest/gtest.go b/test/runner/gtest/gtest.go
index 38e57d62f..affbf1973 100644
--- a/test/runner/gtest/gtest.go
+++ b/test/runner/gtest/gtest.go
@@ -133,17 +133,28 @@ func ParseTestCases(testBin string, benchmarks bool, extraArgs ...string) ([]Tes
 	}
 
 	// Run again to extract benchmarks.
-	args = append([]string{listBenchmarkFlag}, extraArgs...)
-	cmd = exec.Command(testBin, args...)
-	out, err = cmd.Output()
+	tb, err := ParseBenchmarks(testBin, extraArgs...)
+	if err != nil {
+		return nil, err
+	}
+	t = append(t, tb...)
+	return t, nil
+}
+
+// ParseBenchmarks returns each benchmark in a third_party/benchmark binary's list as a single test case.
+func ParseBenchmarks(binary string, extraArgs ...string) ([]TestCase, error) {
+	var t []TestCase
+	args := append([]string{listBenchmarkFlag}, extraArgs...)
+	cmd := exec.Command(binary, args...)
+	out, err := cmd.Output()
 	if err != nil {
 		// We were able to enumerate tests above, but not benchmarks?
 		// We requested them, so we return an error in this case.
 		exitErr, ok := err.(*exec.ExitError)
 		if !ok {
-			return nil, fmt.Errorf("could not enumerate gtest benchmarks: %v", err)
+			return nil, fmt.Errorf("could not enumerate benchmarks: %v", err)
 		}
-		return nil, fmt.Errorf("could not enumerate gtest benchmarks: %v\nstderr\n%s", err, exitErr.Stderr)
+		return nil, fmt.Errorf("could not enumerate benchmarks: %v\nstderr\n%s", err, exitErr.Stderr)
 	}
 
 	benches := strings.Trim(string(out), "\n")
diff --git a/test/util/BUILD b/test/util/BUILD
index 2dcf71613..0c151c5a1 100644
--- a/test/util/BUILD
+++ b/test/util/BUILD
@@ -349,6 +349,19 @@ cc_library(
     deps = [":test_util"],
 )
 
+cc_library(
+    name = "benchmark_main",
+    testonly = 1,
+    srcs = ["benchmark_main.cc"],
+    linkstatic = 1,
+    deps = [
+        ":test_util",
+        "@com_google_absl//absl/flags:flag",
+        gtest,
+        gbenchmark_internal,
+    ],
+)
+
 cc_library(
     name = "epoll_util",
     testonly = 1,
diff --git a/test/util/benchmark_main.cc b/test/util/benchmark_main.cc
new file mode 100644
index 000000000..2d4af6251
--- /dev/null
+++ b/test/util/benchmark_main.cc
@@ -0,0 +1,64 @@
+// Copyright 2018 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.
+
+#include "gtest/gtest.h"
+#include "absl/flags/flag.h"
+#include "third_party/benchmark/src/commandlineflags.h"
+#include "test/util/test_util.h"
+
+DECLARE_bool(benchmark_list_internal);
+DECLARE_string(benchmark_filter_internal);
+ABSL_FLAG(bool, benchmark_enable_random_interleaving_internal, false,
+          "forward");
+ABSL_FLAG(double, benchmark_min_time_internal, -1.0, "forward");
+ABSL_FLAG(int, benchmark_repetitions_internal, 1, "forward");
+
+// From //third_party/benchmark.
+//
+// These conflict with the internal definitions, but all the benchmark binaries
+// link against the external benchmark library for compatibility with the open
+// source build. We massage the internal-only flags into the external ones, and
+// call the function to actually run all registered external benchmarks.
+namespace benchmark {
+BM_DECLARE_bool(benchmark_list_tests);
+BM_DECLARE_string(benchmark_filter);
+BM_DECLARE_int32(benchmark_repetitions);
+BM_DECLARE_double(benchmark_min_time);
+BM_DECLARE_bool(benchmark_enable_random_interleaving);
+extern size_t RunSpecifiedBenchmarks();
+}  // namespace benchmark
+
+using benchmark::FLAGS_benchmark_enable_random_interleaving;
+using benchmark::FLAGS_benchmark_filter;
+using benchmark::FLAGS_benchmark_list_tests;
+using benchmark::FLAGS_benchmark_min_time;
+using benchmark::FLAGS_benchmark_repetitions;
+
+int main(int argc, char** argv) {
+  gvisor::testing::TestInit(&argc, &argv);
+  absl::SetFlag(&FLAGS_benchmark_list_tests,
+                absl::GetFlag(FLAGS_benchmark_list_internal));
+  absl::SetFlag(&FLAGS_benchmark_filter,
+                absl::GetFlag(FLAGS_benchmark_filter_internal));
+  absl::SetFlag(&FLAGS_benchmark_repetitions,
+                absl::GetFlag(FLAGS_benchmark_repetitions_internal));
+  absl::SetFlag(
+      &FLAGS_benchmark_enable_random_interleaving,
+      absl::GetFlag(FLAGS_benchmark_enable_random_interleaving_internal));
+  absl::SetFlag(&FLAGS_benchmark_min_time,
+                absl::GetFlag(FLAGS_benchmark_min_time_internal));
+
+  benchmark::RunSpecifiedBenchmarks();
+  return 0;
+}
-- 
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