diff --git a/lldb/include/lldb/Core/SourceManager.h b/lldb/include/lldb/Core/SourceManager.h
--- a/lldb/include/lldb/Core/SourceManager.h
+++ b/lldb/include/lldb/Core/SourceManager.h
@@ -86,6 +86,9 @@
 
   private:
     void CommonInitializer(const FileSpec &file_spec, Target *target);
+
+    bool IsNewerThanCurrentModule(llvm::sys::TimePoint<> time);
+    void Update(llvm::sys::TimePoint<> mod_time);
   };
 
   typedef std::shared_ptr<File> FileSP;
diff --git a/lldb/source/Core/SourceManager.cpp b/lldb/source/Core/SourceManager.cpp
--- a/lldb/source/Core/SourceManager.cpp
+++ b/lldb/source/Core/SourceManager.cpp
@@ -21,7 +21,10 @@
 #include "lldb/Symbol/LineEntry.h"
 #include "lldb/Symbol/SymbolContext.h"
 #include "lldb/Target/PathMappingList.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/StackFrame.h"
 #include "lldb/Target/Target.h"
+#include "lldb/Target/Thread.h"
 #include "lldb/Utility/AnsiTerminal.h"
 #include "lldb/Utility/ConstString.h"
 #include "lldb/Utility/DataBuffer.h"
@@ -436,7 +439,8 @@
             sc_list.GetContextAtIndex(0, sc);
             if (sc.comp_unit)
               m_file_spec = sc.comp_unit->GetPrimaryFile();
-            m_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec);
+            m_mod_time =
+                FileSystem::Instance().GetModificationTime(m_file_spec);
           }
         }
       }
@@ -531,12 +535,64 @@
   // For now we check each time we want to display info for the file.
   auto curr_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec);
 
+  // If the source file is newer than the executable don't update,
+  // otherwise the source file being displayed will be different from
+  // the executable being ran.
+  // (We only want to update if the executable has been recompiled)
+  if (IsNewerThanCurrentModule(curr_mod_time))
+    // TODO: maybe issue a:
+    //       'warning: Source file is more recent than executable.' ?
+    return;
+
   if (curr_mod_time != llvm::sys::TimePoint<>() &&
       m_mod_time != curr_mod_time) {
-    m_mod_time = curr_mod_time;
-    m_data_sp = FileSystem::Instance().CreateDataBuffer(m_file_spec);
-    m_offsets.clear();
+    Update(curr_mod_time);
+  }
+}
+
+bool SourceManager::File::IsNewerThanCurrentModule(
+    llvm::sys::TimePoint<> time) {
+  DebuggerSP debugger_sp(m_debugger_wp.lock());
+  if (!debugger_sp)
+    return false;
+
+  lldb::TargetSP target_sp(debugger_sp->GetSelectedTarget());
+  if (!target_sp)
+    return false;
+
+  lldb::ProcessSP process_sp(target_sp->CalculateProcess());
+  if (!process_sp)
+    return false;
+
+  ThreadList &thread_list(process_sp->GetThreadList());
+
+  lldb::ThreadSP thread_sp(thread_list.GetSelectedThread());
+  if (!thread_sp)
+    return false;
+
+  lldb::StackFrameSP stackframe_sp(thread_sp->GetSelectedFrame());
+  if (!stackframe_sp)
+    return false;
+
+  const Address pc_addr(stackframe_sp->GetFrameCodeAddress());
+
+  lldb::ModuleSP current_module(pc_addr.GetModule());
+  if (!current_module)
+    return false;
+
+  auto current_module_mod_time = current_module->GetModificationTime();
+
+  if (time <= current_module_mod_time) {
+    return false;
   }
+
+  return true;
+}
+
+void SourceManager::File::Update(llvm::sys::TimePoint<> modification_time) {
+  m_data_sp = FileSystem::Instance().CreateDataBuffer(m_file_spec);
+  m_offsets.clear();
+  m_mod_time = modification_time;
 }
 
 size_t SourceManager::File::DisplaySourceLines(uint32_t line,