[lldb] Make sure there's a value for the key before dereferencing.

Make sure there's a value for the shared_cache_base_address key exists in the dictionary before trying to dereference the value. rdar://76894476
llvm · Sep 8, 2021 · d1d4f36 · d1d4f36
1 parent f4726e7
commit d1d4f36
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp b/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp
@@ -2188,8 +2188,12 @@ lldb::addr_t AppleObjCRuntimeV2::GetSharedCacheBaseAddress() {
   if (!info_dict)
     return LLDB_INVALID_ADDRESS;
 
-  return info_dict->GetValueForKey("shared_cache_base_address")
-      ->GetIntegerValue(LLDB_INVALID_ADDRESS);
+  StructuredData::ObjectSP value =
+      info_dict->GetValueForKey("shared_cache_base_address");
+  if (!value)
+    return LLDB_INVALID_ADDRESS;
+
+  return value->GetIntegerValue(LLDB_INVALID_ADDRESS);
 }
 
 void AppleObjCRuntimeV2::UpdateISAToDescriptorMapIfNeeded() {