[Lldb-commits] [lldb] [LLDB] Check comp_unit before accessing it in DIL (PR #147955)

[Ilia Kuklin via lldb-commits]

https://github.com/kuilpd created https://github.com/llvm/llvm-project/pull/147955

Check `symbol_context.comp_unit` before accessing it to avoid `nullptr` dereferencing.

>From 6b72ecb0f25b34ca112220e8587ef7fea46a38dd Mon Sep 17 00:00:00 2001
From: Ilia Kuklin <ikuklin at accesssoftek.com>
Date: Thu, 10 Jul 2025 17:45:15 +0500
Subject: [PATCH] [LLDB] Check comp_unit before accessing it in DIL

---
 lldb/source/ValueObject/DILEval.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lldb/source/ValueObject/DILEval.cpp b/lldb/source/ValueObject/DILEval.cpp
index 8ca9b4215985d..fd3f9f8724608 100644
--- a/lldb/source/ValueObject/DILEval.cpp
+++ b/lldb/source/ValueObject/DILEval.cpp
@@ -50,8 +50,9 @@ lldb::ValueObjectSP LookupGlobalIdentifier(
   // Get a global variables list without the locals from the current frame
   SymbolContext symbol_context =
       stack_frame->GetSymbolContext(lldb::eSymbolContextCompUnit);
-  lldb::VariableListSP variable_list =
-      symbol_context.comp_unit->GetVariableList(true);
+  lldb::VariableListSP variable_list;
+  if (symbol_context.comp_unit)
+    variable_list = symbol_context.comp_unit->GetVariableList(true);
 
   name_ref.consume_front("::");
   lldb::ValueObjectSP value_sp;