3 files changed, 65 insertions, 8 deletions
diff --git a/libunwindstack/include/unwindstack/DexFiles.h b/libunwindstack/include/unwindstack/DexFiles.h
index 26f5d35..c2fde74 100644
--- a/libunwindstack/include/unwindstack/DexFiles.h
+++ b/libunwindstack/include/unwindstack/DexFiles.h
@@ -25,16 +25,18 @@
 #include <unordered_map>
 #include <vector>
 
+#include <unwindstack/Global.h>
+#include <unwindstack/Memory.h>
+
 namespace unwindstack {
 
 // Forward declarations.
 class DexFile;
 class Maps;
 struct MapInfo;
-class Memory;
 enum ArchEnum : uint8_t;
 
-class DexFiles {
+class DexFiles : public Global {
  public:
   explicit DexFiles(std::shared_ptr<Memory>& memory);
   DexFiles(std::shared_ptr<Memory>& memory, std::vector<std::string>& search_libs);
@@ -60,8 +62,7 @@ class DexFiles {
 
   bool ReadEntry64();
 
-  std::shared_ptr<Memory> memory_;
-  std::vector<std::string> search_libs_;
+  bool ReadVariableData(uint64_t ptr_offset) override;
 
   std::mutex lock_;
   bool initialized_ = false;
diff --git a/libunwindstack/include/unwindstack/Global.h b/libunwindstack/include/unwindstack/Global.h
new file mode 100644
index 0000000..70e3ddd
--- /dev/null
+++ b/libunwindstack/include/unwindstack/Global.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2018 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 _LIBUNWINDSTACK_GLOBAL_H
+#define _LIBUNWINDSTACK_GLOBAL_H
+
+#include <stdint.h>
+
+#include <memory>
+#include <mutex>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include <unwindstack/Memory.h>
+
+namespace unwindstack {
+
+// Forward declarations.
+class Maps;
+struct MapInfo;
+
+class Global {
+ public:
+  explicit Global(std::shared_ptr<Memory>& memory);
+  Global(std::shared_ptr<Memory>& memory, std::vector<std::string>& search_libs);
+  virtual ~Global() = default;
+
+ protected:
+  uint64_t GetVariableOffset(MapInfo* info, const std::string& variable);
+  void FindAndReadVariable(Maps* maps, const char* variable);
+
+  virtual bool ReadVariableData(uint64_t offset) = 0;
+
+  std::shared_ptr<Memory> memory_;
+  std::vector<std::string> search_libs_;
+};
+
+}  // namespace unwindstack
+
+#endif  // _LIBUNWINDSTACK_GLOBAL_H
diff --git a/libunwindstack/include/unwindstack/JitDebug.h b/libunwindstack/include/unwindstack/JitDebug.h
index 0bcd0b0..ccb473f 100644
--- a/libunwindstack/include/unwindstack/JitDebug.h
+++ b/libunwindstack/include/unwindstack/JitDebug.h
@@ -24,15 +24,17 @@
 #include <string>
 #include <vector>
 
+#include <unwindstack/Global.h>
+#include <unwindstack/Memory.h>
+
 namespace unwindstack {
 
 // Forward declarations.
 class Elf;
 class Maps;
-class Memory;
 enum ArchEnum : uint8_t;
 
-class JitDebug {
+class JitDebug : public Global {
  public:
   explicit JitDebug(std::shared_ptr<Memory>& memory);
   JitDebug(std::shared_ptr<Memory>& memory, std::vector<std::string>& search_libs);
@@ -45,11 +47,9 @@ class JitDebug {
  private:
   void Init(Maps* maps);
 
-  std::shared_ptr<Memory> memory_;
   uint64_t entry_addr_ = 0;
   bool initialized_ = false;
   std::vector<Elf*> elf_list_;
-  std::vector<std::string> search_libs_;
 
   std::mutex lock_;
 
@@ -62,6 +62,8 @@ class JitDebug {
   uint64_t ReadEntry32Pack(uint64_t* start, uint64_t* size);
   uint64_t ReadEntry32Pad(uint64_t* start, uint64_t* size);
   uint64_t ReadEntry64(uint64_t* start, uint64_t* size);
+
+  bool ReadVariableData(uint64_t ptr_offset) override;
 };
 
 }  // namespace unwindstack