Extract linux-specific test setup to separate file

PiperOrigin-RevId: 280264564

test/util/BUILD

@@ -232,7 +232,13 @@ cc_library(
 cc_library(
     name = "test_util",
     testonly = 1,
-    srcs = ["test_util.cc"],
+    srcs = [
+        "test_util.cc",
+    ] + select_for_linux(
+        [
+            "test_util_impl.cc",
+        ],
+    ),
     hdrs = ["test_util.h"],
     deps = [
         ":fs_util",

test/util/test_util.cc

@@ -116,9 +116,6 @@ PosixErrorOr<KernelVersion> GetKernelVersion() {
   return ParseKernelVersion(buf.release);
 }
 
-void SetupGvisorDeathTest() {
-}
-
 std::string CPUSetToString(const cpu_set_t& set, size_t cpus) {
   std::string str = "cpuset[";
   for (unsigned int n = 0; n < cpus; n++) {
@@ -224,15 +221,5 @@ bool Equivalent(uint64_t current, uint64_t target, double tolerance) {
   return abs_diff <= static_cast<uint64_t>(tolerance * target);
 }
 
-void TestInit(int* argc, char*** argv) {
-  ::testing::InitGoogleTest(argc, *argv);
-  ::absl::ParseCommandLine(*argc, *argv);
-
-  // Always mask SIGPIPE as it's common and tests aren't expected to handle it.
-  struct sigaction sa = {};
-  sa.sa_handler = SIG_IGN;
-  TEST_CHECK(sigaction(SIGPIPE, &sa, nullptr) == 0);
-}
-
 }  // namespace testing
 }  // namespace gvisor

test/util/test_util.h

@@ -221,7 +221,9 @@ enum class Platform {
 bool IsRunningOnGvisor();
 Platform GvisorPlatform();
 
+#ifdef __linux__
 void SetupGvisorDeathTest();
+#endif
 
 struct KernelVersion {
   int major;

test/util/test_util_impl.cc

@@ -0,0 +1,38 @@
+// 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.
+
+#include <signal.h>
+
+#include "gtest/gtest.h"
+#include "absl/flags/flag.h"
+#include "absl/flags/parse.h"
+#include "test/util/logging.h"
+
+namespace gvisor {
+namespace testing {
+
+void SetupGvisorDeathTest() {}
+
+void TestInit(int* argc, char*** argv) {
+  ::testing::InitGoogleTest(argc, *argv);
+  ::absl::ParseCommandLine(*argc, *argv);
+
+  // Always mask SIGPIPE as it's common and tests aren't expected to handle it.
+  struct sigaction sa = {};
+  sa.sa_handler = SIG_IGN;
+  TEST_CHECK(sigaction(SIGPIPE, &sa, nullptr) == 0);
+}
+
+}  // namespace testing
+}  // namespace gvisor