Load dex files from ART-specific data structure.

Fixes cdex which was recently changed to have shared data section,
which means the DEX PC cannot be used to find the right symbol,
as the bytecode is no longer within the dex file, and in-fact,
we might have to scan multiple dex files to find the method.

Bug: 72520014
Test: testrunner.py --host --cdex-none -t 137
Test: testrunner.py --host --cdex-fast -t 137
Test: All unit tests pass.
Change-Id: I80265d05ad69dd9cefbe3f8a75e4cd349002af5e

1 files changed, 25 insertions, 3 deletions

diff --git a/libunwindstack/include/unwindstack/DexFiles.h b/libunwindstack/include/unwindstack/DexFiles.h
index 50c9c321e..26f5d35a3 100644
--- a/libunwindstack/include/unwindstack/DexFiles.h
+++ b/libunwindstack/include/unwindstack/DexFiles.h
@@ -23,6 +23,7 @@
 #include <mutex>
 #include <string>
 #include <unordered_map>
+#include <vector>
 
 namespace unwindstack {
 
@@ -36,19 +37,40 @@ enum ArchEnum : uint8_t;
 class DexFiles {
  public:
   explicit DexFiles(std::shared_ptr<Memory>& memory);
+  DexFiles(std::shared_ptr<Memory>& memory, std::vector<std::string>& search_libs);
   ~DexFiles();
 
   DexFile* GetDexFile(uint64_t dex_file_offset, MapInfo* info);
 
-  void GetMethodInformation(uint64_t dex_file_offset, uint64_t dex_offset, MapInfo* info,
-                            std::string* method_name, uint64_t* method_offset);
+  void GetMethodInformation(Maps* maps, MapInfo* info, uint64_t dex_pc, std::string* method_name,
+                            uint64_t* method_offset);
 
   void SetArch(ArchEnum arch);
 
  private:
+  void Init(Maps* maps);
+
+  bool GetAddr(size_t index, uint64_t* addr);
+
+  uint64_t ReadEntryPtr32(uint64_t addr);
+
+  uint64_t ReadEntryPtr64(uint64_t addr);
+
+  bool ReadEntry32();
+
+  bool ReadEntry64();
+
   std::shared_ptr<Memory> memory_;
-  std::mutex files_lock_;
+  std::vector<std::string> search_libs_;
+
+  std::mutex lock_;
+  bool initialized_ = false;
   std::unordered_map<uint64_t, DexFile*> files_;
+
+  uint64_t entry_addr_ = 0;
+  uint64_t (DexFiles::*read_entry_ptr_func_)(uint64_t) = nullptr;
+  bool (DexFiles::*read_entry_func_)() = nullptr;
+  std::vector<uint64_t> addrs_;
 };
 
 }  // namespace unwindstack