installd: Unit test for RunDex2oat

Add unit tests run_dex2oat_test.

In order to make RunDex2oat testable,
 - RunDex2Oat is extracted from dexopt.cpp such that the class is
   visible to test
 - ExecVHelper is extracted from dexopt.cpp such that it can be used by
   RunDex2Oat and the others in the original file.
 - Main logic of RunDex2Oat is removed from constructor (otherwise
   virtual functions can't be overridden in derived class).

Bug: 161470356
Test: atest run_dex2oat_test
Test: atest frameworks/native/cmds/installd/tests
Test: cmd package compile -m speed -f com.android.egg

Change-Id: I416d57a008374a598def9160b65407ed043ab0eb
diff --git a/cmds/installd/run_dex2oat.h b/cmds/installd/run_dex2oat.h
new file mode 100644
index 0000000..e4450b0
--- /dev/null
+++ b/cmds/installd/run_dex2oat.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#ifndef ANDROID_INSTALLD_RUN_DEX2OAT_H
+#define ANDROID_INSTALLD_RUN_DEX2OAT_H
+
+#include <memory>
+#include <string>
+
+#include "execv_helper.h"
+
+namespace android {
+namespace installd {
+
+class RunDex2Oat {
+  public:
+    explicit RunDex2Oat(const char* dex2oat_bin, ExecVHelper* execv_helper);
+    virtual ~RunDex2Oat();
+
+    void Initialize(int zip_fd,
+                    int oat_fd,
+                    int input_vdex_fd,
+                    int output_vdex_fd,
+                    int image_fd,
+                    const char* input_file_name,
+                    const char* output_file_name,
+                    int swap_fd,
+                    const char* instruction_set,
+                    const char* compiler_filter,
+                    bool debuggable,
+                    bool post_bootcomplete,
+                    bool for_restore,
+                    int profile_fd,
+                    const char* class_loader_context,
+                    const std::string& class_loader_context_fds,
+                    int target_sdk_version,
+                    bool enable_hidden_api_checks,
+                    bool generate_compact_dex,
+                    int dex_metadata_fd,
+                    bool use_jitzygote_image,
+                    const char* compilation_reason);
+
+    void Exec(int exit_code);
+
+  protected:
+    virtual std::string GetProperty(const std::string& key, const std::string& default_value);
+    virtual bool GetBoolProperty(const std::string& key, bool default_value);
+
+  private:
+    void AddArg(const std::string& arg);
+    void AddRuntimeArg(const std::string& arg);
+
+    std::string MapPropertyToArg(const std::string& property,
+                                 const std::string& format,
+                                 const std::string& default_value = "");
+
+    std::string MapPropertyToArgWithBackup(const std::string& property,
+                                           const std::string& backupProperty,
+                                           const std::string& format,
+                                           const std::string& default_value = "");
+
+    const std::string dex2oat_bin_;
+    ExecVHelper* execv_helper_;  // not owned
+};
+
+}  // namespace installd
+}  // namespace android
+
+#endif  // ANDROID_INSTALLD_RUN_DEX2OAT_H