Trust JIT unwind plan patch for lldb

lldb-jit-unwind.diff

diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextLLDB.cpp b/lldb/source/Plugins/Process/Utility/RegisterContextLLDB.cpp
index 423b2e53c66..62dedbd75a6 100644
--- a/lldb/source/Plugins/Process/Utility/RegisterContextLLDB.cpp
+++ b/lldb/source/Plugins/Process/Utility/RegisterContextLLDB.cpp
@@ -829,6 +829,22 @@ UnwindPlanSP RegisterContextLLDB::GetFullUnwindPlanForFrame() {
     }
   }
 
+  // The JIT generated module may generate their .eh_frame or .debug_frame
+  // sections. It makes sense to trust that unwind plan if it is valid.
+  if (pc_module_sp->GetFileSpec().GetFilename().GetStringRef().startswith("JIT(0x") &&
+      process) {
+    m_fast_unwind_plan_sp.reset();
+    UnwindPlanSP unwind_plan_sp =
+      func_unwinders_sp->GetEHFrameUnwindPlan(process->GetTarget(), m_current_offset_backed_up_one);
+    if (!unwind_plan_sp) {
+      unwind_plan_sp =
+        func_unwinders_sp->GetDebugFrameUnwindPlan(process->GetTarget(), m_current_offset_backed_up_one);
+    }
+    if (unwind_plan_sp && unwind_plan_sp->PlanValidAtAddress(m_current_pc)) {
+      return unwind_plan_sp;
+    }
+  }
+
   // Ask the DynamicLoader if the eh_frame CFI should be trusted in this frame
   // even when it's frame zero This comes up if we have hand-written functions
   // in a Module and hand-written eh_frame.  The assembly instruction