Index: lldb/source/Commands/CommandObjectTarget.cpp
===================================================================
--- lldb/source/Commands/CommandObjectTarget.cpp
+++ lldb/source/Commands/CommandObjectTarget.cpp
@@ -3962,8 +3962,12 @@
             "name."),
         m_current_frame_option(
             LLDB_OPT_SET_2, false, "frame", 'F',
-            "Locate the debug symbols for the currently selected frame.",
-            false, true)
+            "Locate the debug symbols for the currently selected frame.", false,
+            true),
+        m_current_stack_option(LLDB_OPT_SET_2, false, "stack", 'S',
+                               "Locate the debug symbols for every frame in "
+                               "the current call stack.",
+                               false, true)
 
   {
     m_option_group.Append(&m_uuid_option_group, LLDB_OPT_SET_ALL,
@@ -3971,6 +3975,8 @@
     m_option_group.Append(&m_file_option, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
     m_option_group.Append(&m_current_frame_option, LLDB_OPT_SET_2,
                           LLDB_OPT_SET_2);
+    m_option_group.Append(&m_current_stack_option, LLDB_OPT_SET_2,
+                          LLDB_OPT_SET_2);
     m_option_group.Finalize();
   }
 
@@ -4246,6 +4252,64 @@
     return true;
   }
 
+  bool AddSymbolsForStack(Target *target, CommandReturnObject &result,
+                          bool &flush) {
+    assert(m_current_stack_option.GetOptionValue().OptionWasSet());
+
+    Process *process = m_exe_ctx.GetProcessPtr();
+    if (!process) {
+      result.AppendError(
+          "a process must exist in order to use the --stack option");
+      return false;
+    }
+
+    const StateType process_state = process->GetState();
+    if (!StateIsStoppedState(process_state, true)) {
+      result.AppendErrorWithFormat("process is not stopped: %s",
+                                   StateAsCString(process_state));
+    }
+
+    Thread *thread = m_exe_ctx.GetThreadPtr();
+    if (!thread) {
+      result.AppendError("invalid current thread");
+      return false;
+    }
+
+    bool symbols_found = false;
+    uint32_t frame_count = thread->GetStackFrameCount();
+    for (uint32_t i = 0; i < frame_count; ++i) {
+      lldb::StackFrameSP frame_sp = thread->GetStackFrameAtIndex(i);
+
+      ModuleSP frame_module_sp(
+          frame_sp->GetSymbolContext(eSymbolContextModule).module_sp);
+      if (!frame_module_sp)
+        continue;
+
+      ModuleSpec module_spec;
+      module_spec.GetUUID() = frame_module_sp->GetUUID();
+
+      if (FileSystem::Instance().Exists(
+              frame_module_sp->GetPlatformFileSpec())) {
+        module_spec.GetArchitecture() = frame_module_sp->GetArchitecture();
+        module_spec.GetFileSpec() = frame_module_sp->GetPlatformFileSpec();
+      }
+
+      bool current_frame_flush = false;
+      if (DownloadObjectAndSymbolFile(module_spec, target, result,
+                                      current_frame_flush))
+        symbols_found = true;
+      flush |= current_frame_flush;
+    }
+
+    if (!symbols_found) {
+      result.AppendError(
+          "unable to find debug symbols in the current call stack");
+      return false;
+    }
+
+    return true;
+  }
+
   bool DoExecute(Args &args, CommandReturnObject &result) override {
     Target *target = m_exe_ctx.GetTargetPtr();
     result.SetStatus(eReturnStatusFailed);
@@ -4256,6 +4320,8 @@
     const bool file_option_set = m_file_option.GetOptionValue().OptionWasSet();
     const bool frame_option_set =
         m_current_frame_option.GetOptionValue().OptionWasSet();
+    const bool stack_option_set =
+        m_current_stack_option.GetOptionValue().OptionWasSet();
     const size_t argc = args.GetArgumentCount();
 
     if (argc == 0) {
@@ -4265,6 +4331,8 @@
         AddSymbolsForFile(target, result, flush);
       else if (frame_option_set)
         AddSymbolsForFrame(target, result, flush);
+      else if (stack_option_set)
+        AddSymbolsForStack(target, result, flush);
       else
         result.AppendError("one or more symbol file paths must be specified, "
                            "or options must be specified");
@@ -4334,6 +4402,7 @@
   OptionGroupUUID m_uuid_option_group;
   OptionGroupFile m_file_option;
   OptionGroupBoolean m_current_frame_option;
+  OptionGroupBoolean m_current_stack_option;
 };
 
 #pragma mark CommandObjectTargetSymbols