Add RunfilesPath to test_util

A few tests have their own ad-hoc implementations. Add a single common one.

PiperOrigin-RevId: 283601666

3 files changed, 54 insertions, 0 deletions

diff --git a/test/util/BUILD b/test/util/BUILD
index 4526bb3f1..cbc728159 100644
--- a/test/util/BUILD
+++ b/test/util/BUILD
@@ -237,6 +237,7 @@ cc_library(
     ] + select_for_linux(
         [
             "test_util_impl.cc",
+            "test_util_runfiles.cc",
         ],
     ),
     hdrs = ["test_util.h"],
@@ -245,6 +246,7 @@ cc_library(
         ":logging",
         ":posix_error",
         ":save_util",
+        "@bazel_tools//tools/cpp/runfiles",
         "@com_google_absl//absl/base:core_headers",
         "@com_google_absl//absl/flags:flag",
         "@com_google_absl//absl/flags:parse",
diff --git a/test/util/test_util.h b/test/util/test_util.h
index dc30575b8..ee6c2bf4d 100644
--- a/test/util/test_util.h
+++ b/test/util/test_util.h
@@ -764,6 +764,12 @@ MATCHER_P2(EquivalentWithin, target, tolerance,
   return Equivalent(arg, target, tolerance);
 }
 
+// Returns the absolute path to the a data dependency. 'path' is the runfile
+// location relative to workspace root.
+#ifdef __linux__
+std::string RunfilePath(std::string path);
+#endif
+
 void TestInit(int* argc, char*** argv);
 
 }  // namespace testing
diff --git a/test/util/test_util_runfiles.cc b/test/util/test_util_runfiles.cc
new file mode 100644
index 000000000..7210094eb
--- /dev/null
+++ b/test/util/test_util_runfiles.cc
@@ -0,0 +1,46 @@
+// 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 <iostream>
+#include <string>
+
+#include "test/util/fs_util.h"
+#include "test/util/test_util.h"
+#include "tools/cpp/runfiles/runfiles.h"
+
+namespace gvisor {
+namespace testing {
+
+std::string RunfilePath(std::string path) {
+  static const bazel::tools::cpp::runfiles::Runfiles* const runfiles = [] {
+    std::string error;
+    auto* runfiles =
+        bazel::tools::cpp::runfiles::Runfiles::CreateForTest(&error);
+    if (runfiles == nullptr) {
+      std::cerr << "Unable to find runfiles: " << error << std::endl;
+    }
+    return runfiles;
+  }();
+
+  if (!runfiles) {
+    // Can't find runfiles? This probably won't work, but __main__/path is our
+    // best guess.
+    return JoinPath("__main__", path);
+  }
+
+  return runfiles->Rlocation(JoinPath("__main__", path));
+}
+
+}  // namespace testing
+}  // namespace gvisor