[lldb] Fix SBMemoryRegionInfoListExtensions iter to yield unique references

Author: Zhiyuan Li

lldb/bindings/interface/SBMemoryRegionInfoListExtensions.i

@@ -9,8 +9,8 @@
       '''Iterate over all the memory regions in a lldb.SBMemoryRegionInfoList object.'''
       import lldb
       size = self.GetSize()
-      region = lldb.SBMemoryRegionInfo()
       for i in range(size):
+        region = lldb.SBMemoryRegionInfo()
         self.GetMemoryRegionAtIndex(i, region)
         yield region
     %}

lldb/test/API/python_api/find_in_memory/TestFindInMemory.py

@@ -154,14 +154,33 @@ def test_find_in_memory_unaligned(self):
         self.assertEqual(addr, lldb.LLDB_INVALID_ADDRESS)
 
     def test_memory_info_list_iterable(self):
-        """Make sure the SBMemoryRegionInfoList is iterable"""
+        """Make sure the SBMemoryRegionInfoList is iterable and each yielded object is unique"""
         self.assertTrue(self.process, PROCESS_IS_VALID)
         self.assertState(self.process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)
 
         info_list = self.process.GetMemoryRegions()
         self.assertTrue(info_list.GetSize() > 0)
+
+        collected_info = []
         try:
             for info in info_list:
-                pass
+                collected_info.append(info)
         except Exception:
             self.fail("SBMemoryRegionInfoList is not iterable")
+
+        for i in range(len(collected_info)):
+            region = lldb.SBMemoryRegionInfo()
+            info_list.GetMemoryRegionAtIndex(i, region)
+
+            self.assertEqual(
+                collected_info[i],
+                region,
+                f"items {i}: iterator data should match index access data",
+            )
+
+        if len(collected_info) >= 2:
+            self.assertNotEqual(
+                collected_info[0].GetRegionBase(),
+                collected_info[1].GetRegionBase(),
+                "Different items should have different base addresses",
+            )