Index: include/lldb/API/SBMemoryRegionInfo.h
===================================================================
--- include/lldb/API/SBMemoryRegionInfo.h
+++ include/lldb/API/SBMemoryRegionInfo.h
@@ -102,6 +102,7 @@
 
   const lldb_private::MemoryRegionInfo &ref() const;
 
+  // Unused.
   SBMemoryRegionInfo(const lldb_private::MemoryRegionInfo *lldb_object_ptr);
 
   lldb::MemoryRegionInfoUP m_opaque_ap;
Index: include/lldb/API/SBMemoryRegionInfoList.h
===================================================================
--- include/lldb/API/SBMemoryRegionInfoList.h
+++ include/lldb/API/SBMemoryRegionInfoList.h
@@ -42,6 +42,12 @@
   const MemoryRegionInfoListImpl &operator*() const;
 
 private:
+  friend class SBProcess;
+
+  lldb_private::MemoryRegionInfos &ref();
+
+  const lldb_private::MemoryRegionInfos &ref() const;
+
   std::unique_ptr<MemoryRegionInfoListImpl> m_opaque_ap;
 };
 
Index: include/lldb/Target/MemoryRegionInfo.h
===================================================================
--- include/lldb/Target/MemoryRegionInfo.h
+++ include/lldb/Target/MemoryRegionInfo.h
@@ -123,6 +123,12 @@
   return lhs < rhs.GetRange().GetRangeBase();
 }
 
+// Forward-declarable wrapper.
+class MemoryRegionInfos : public std::vector<lldb_private::MemoryRegionInfo> {
+public:
+  using std::vector<lldb_private::MemoryRegionInfo>::vector;
+};
+
 }
 
 namespace llvm {
Index: include/lldb/Target/Process.h
===================================================================
--- include/lldb/Target/Process.h
+++ include/lldb/Target/Process.h
@@ -2081,7 +2081,7 @@
   ///     An error value.
   //------------------------------------------------------------------
   virtual Status
-  GetMemoryRegions(std::vector<lldb::MemoryRegionInfoSP> &region_list);
+  GetMemoryRegions(lldb_private::MemoryRegionInfos &region_list);
 
   virtual Status GetWatchpointSupportInfo(uint32_t &num) {
     Status error;
Index: include/lldb/lldb-forward.h
===================================================================
--- include/lldb/lldb-forward.h
+++ include/lldb/lldb-forward.h
@@ -125,13 +125,14 @@
 class Language;
 class LanguageCategory;
 class LanguageRuntime;
-class MemoryRegionInfo;
 class LineTable;
 class Listener;
 class Log;
 class Mangled;
 class Materializer;
 class MemoryHistory;
+class MemoryRegionInfo;
+class MemoryRegionInfos;
 class Module;
 class ModuleList;
 class ModuleSpec;
@@ -369,7 +370,6 @@
 typedef std::shared_ptr<lldb_private::Listener> ListenerSP;
 typedef std::weak_ptr<lldb_private::Listener> ListenerWP;
 typedef std::shared_ptr<lldb_private::MemoryHistory> MemoryHistorySP;
-typedef std::shared_ptr<lldb_private::MemoryRegionInfo> MemoryRegionInfoSP;
 typedef std::unique_ptr<lldb_private::MemoryRegionInfo> MemoryRegionInfoUP;
 typedef std::shared_ptr<lldb_private::Module> ModuleSP;
 typedef std::weak_ptr<lldb_private::Module> ModuleWP;
Index: source/API/SBMemoryRegionInfoList.cpp
===================================================================
--- source/API/SBMemoryRegionInfoList.cpp
+++ source/API/SBMemoryRegionInfoList.cpp
@@ -32,31 +32,47 @@
     return *this;
   }
 
-  uint32_t GetSize() { return m_regions.size(); }
+  size_t GetSize() const { return m_regions.size(); }
 
-  void Append(const lldb::SBMemoryRegionInfo &sb_region) {
+  void Reserve(size_t capacity) { return m_regions.reserve(capacity); }
+
+  void Append(const MemoryRegionInfo &sb_region) {
     m_regions.push_back(sb_region);
   }
 
   void Append(const MemoryRegionInfoListImpl &list) {
-    for (auto val : list.m_regions)
+    Reserve(GetSize() + list.GetSize());
+
+    for (const auto &val : list.m_regions)
       Append(val);
   }
 
   void Clear() { m_regions.clear(); }
 
-  bool GetMemoryRegionInfoAtIndex(uint32_t index,
-                                  SBMemoryRegionInfo &region_info) {
+  bool GetMemoryRegionInfoAtIndex(size_t index,
+                                  MemoryRegionInfo &region_info) {
     if (index >= GetSize())
       return false;
     region_info = m_regions[index];
     return true;
   }
 
+  MemoryRegionInfos &Ref() { return m_regions; }
+
+  const MemoryRegionInfos &Ref() const { return m_regions; }
+
 private:
-  std::vector<lldb::SBMemoryRegionInfo> m_regions;
+  MemoryRegionInfos m_regions;
 };
 
+MemoryRegionInfos &SBMemoryRegionInfoList::ref() {
+  return m_opaque_ap->Ref();
+}
+
+const MemoryRegionInfos &SBMemoryRegionInfoList::ref() const {
+  return m_opaque_ap->Ref();
+}
+
 SBMemoryRegionInfoList::SBMemoryRegionInfoList()
     : m_opaque_ap(new MemoryRegionInfoListImpl()) {}
 
@@ -82,7 +98,7 @@
     uint32_t idx, SBMemoryRegionInfo &region_info) {
   Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
 
-  bool result = m_opaque_ap->GetMemoryRegionInfoAtIndex(idx, region_info);
+  bool result = m_opaque_ap->GetMemoryRegionInfoAtIndex(idx, region_info.ref());
 
   if (log) {
     SBStream sstr;
@@ -100,7 +116,7 @@
 void SBMemoryRegionInfoList::Clear() { m_opaque_ap->Clear(); }
 
 void SBMemoryRegionInfoList::Append(SBMemoryRegionInfo &sb_region) {
-  m_opaque_ap->Append(sb_region);
+  m_opaque_ap->Append(sb_region.ref());
 }
 
 void SBMemoryRegionInfoList::Append(SBMemoryRegionInfoList &sb_region_list) {
Index: source/API/SBProcess.cpp
===================================================================
--- source/API/SBProcess.cpp
+++ source/API/SBProcess.cpp
@@ -1358,18 +1358,14 @@
                                SBMemoryRegionInfo &sb_region_info) {
   lldb::SBError sb_error;
   ProcessSP process_sp(GetSP());
-  MemoryRegionInfoSP region_info_sp =
-      std::make_shared<lldb_private::MemoryRegionInfo>();
   if (process_sp) {
     Process::StopLocker stop_locker;
     if (stop_locker.TryLock(&process_sp->GetRunLock())) {
       std::lock_guard<std::recursive_mutex> guard(
           process_sp->GetTarget().GetAPIMutex());
+
       sb_error.ref() =
-          process_sp->GetMemoryRegionInfo(load_addr, *region_info_sp);
-      if (sb_error.Success()) {
-        sb_region_info.ref() = *region_info_sp;
-      }
+          process_sp->GetMemoryRegionInfo(load_addr, sb_region_info.ref());
     } else {
       Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
       if (log)
@@ -1385,35 +1381,23 @@
 }
 
 lldb::SBMemoryRegionInfoList SBProcess::GetMemoryRegions() {
-  lldb::SBError sb_error;
   lldb::SBMemoryRegionInfoList sb_region_list;
+
   ProcessSP process_sp(GetSP());
-  if (process_sp) {
-    Process::StopLocker stop_locker;
-    if (stop_locker.TryLock(&process_sp->GetRunLock())) {
-      std::lock_guard<std::recursive_mutex> guard(
-          process_sp->GetTarget().GetAPIMutex());
-      std::vector<MemoryRegionInfoSP> region_list;
-      sb_error.ref() = process_sp->GetMemoryRegions(region_list);
-      if (sb_error.Success()) {
-        std::vector<MemoryRegionInfoSP>::iterator end = region_list.end();
-        for (std::vector<MemoryRegionInfoSP>::iterator it = region_list.begin();
-             it != end; it++) {
-          SBMemoryRegionInfo sb_region_info(it->get());
-          sb_region_list.Append(sb_region_info);
-        }
-      }
-    } else {
-      Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
-      if (log)
-        log->Printf(
-            "SBProcess(%p)::GetMemoryRegionInfo() => error: process is running",
-            static_cast<void *>(process_sp.get()));
-      sb_error.SetErrorString("process is running");
-    }
+  Process::StopLocker stop_locker;
+  if (process_sp && stop_locker.TryLock(&process_sp->GetRunLock())) {
+    std::lock_guard<std::recursive_mutex> guard(
+        process_sp->GetTarget().GetAPIMutex());
+
+    process_sp->GetMemoryRegions(sb_region_list.ref());
   } else {
-    sb_error.SetErrorString("SBProcess is invalid");
+    Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
+    if (log)
+      log->Printf(
+          "SBProcess(%p)::GetMemoryRegionInfo() => error: process is running",
+          static_cast<void *>(process_sp.get()));
   }
+
   return sb_region_list;
 }
 
Index: source/Target/Process.cpp
===================================================================
--- source/Target/Process.cpp
+++ source/Target/Process.cpp
@@ -6035,7 +6035,7 @@
 }
 
 Status
-Process::GetMemoryRegions(std::vector<lldb::MemoryRegionInfoSP> &region_list) {
+Process::GetMemoryRegions(lldb_private::MemoryRegionInfos &region_list) {
 
   Status error;
 
@@ -6043,17 +6043,17 @@
 
   region_list.clear();
   do {
-    lldb::MemoryRegionInfoSP region_info(new lldb_private::MemoryRegionInfo());
-    error = GetMemoryRegionInfo(range_end, *region_info);
+    lldb_private::MemoryRegionInfo region_info;
+    error = GetMemoryRegionInfo(range_end, region_info);
     // GetMemoryRegionInfo should only return an error if it is unimplemented.
     if (error.Fail()) {
       region_list.clear();
       break;
     }
 
-    range_end = region_info->GetRange().GetRangeEnd();
-    if (region_info->GetMapped() == MemoryRegionInfo::eYes) {
-      region_list.push_back(region_info);
+    range_end = region_info.GetRange().GetRangeEnd();
+    if (region_info.GetMapped() == MemoryRegionInfo::eYes) {
+      region_list.push_back(std::move(region_info));
     }
   } while (range_end != LLDB_INVALID_ADDRESS);