1 files changed, 98 insertions, 0 deletions
diff --git a/artd/path_utils.cc b/artd/path_utils.cc
new file mode 100644
index 0000000000..c4d9031220
--- /dev/null
+++ b/artd/path_utils.cc
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * 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 "path_utils.h"
+
+#include <filesystem>
+
+#include "aidl/com/android/server/art/BnArtd.h"
+#include "android-base/errors.h"
+#include "android-base/result.h"
+#include "android-base/strings.h"
+#include "arch/instruction_set.h"
+#include "base/file_utils.h"
+#include "oat_file_assistant.h"
+
+namespace art {
+namespace artd {
+
+namespace {
+
+using ::aidl::com::android::server::art::ArtifactsPath;
+using ::android::base::EndsWith;
+using ::android::base::Error;
+using ::android::base::Result;
+
+Result<void> ValidateAbsoluteNormalPath(const std::string& path_str) {
+  if (path_str.empty()) {
+    return Errorf("Path is empty");
+  }
+  std::filesystem::path path(path_str);
+  if (!path.is_absolute()) {
+    return Errorf("Path '{}' is not an absolute path", path_str);
+  }
+  if (path.lexically_normal() != path_str) {
+    return Errorf("Path '{}' is not in normal form", path_str);
+  }
+  return {};
+}
+
+Result<void> ValidateDexPath(const std::string& dex_path) {
+  OR_RETURN(ValidateAbsoluteNormalPath(dex_path));
+  if (!EndsWith(dex_path, ".apk") && !EndsWith(dex_path, ".jar")) {
+    return Errorf("Dex path '{}' has an invalid extension", dex_path);
+  }
+  return {};
+}
+
+}  // namespace
+
+Result<std::string> BuildOatPath(const ArtifactsPath& artifacts_path) {
+  OR_RETURN(ValidateDexPath(artifacts_path.dexPath));
+
+  InstructionSet isa = GetInstructionSetFromString(artifacts_path.isa.c_str());
+  if (isa == InstructionSet::kNone) {
+    return Errorf("Instruction set '{}' is invalid", artifacts_path.isa.c_str());
+  }
+
+  std::string error_msg;
+  std::string path;
+  if (artifacts_path.isInDalvikCache) {
+    // Apps' OAT files are never in ART APEX data.
+    if (!OatFileAssistant::DexLocationToOatFilename(
+            artifacts_path.dexPath, isa, /*deny_art_apex_data_files=*/true, &path, &error_msg)) {
+      return Error() << error_msg;
+    }
+    return path;
+  } else {
+    if (!OatFileAssistant::DexLocationToOdexFilename(
+            artifacts_path.dexPath, isa, &path, &error_msg)) {
+      return Error() << error_msg;
+    }
+    return path;
+  }
+}
+
+std::string OatPathToVdexPath(const std::string& oat_path) {
+  return ReplaceFileExtension(oat_path, "vdex");
+}
+
+std::string OatPathToArtPath(const std::string& oat_path) {
+  return ReplaceFileExtension(oat_path, "art");
+}
+
+}  // namespace artd
+}  // namespace art