[lldb][lldb-dap] Respect x86 disassembly flavor setting

Ensure the disassembly respects the "target.x86-disassembly-flavor" setting for x86 and x86_64 targets.

Depends on llvm#134626

Author: da-viper

lldb/tools/lldb-dap/Handler/DisassembleRequestHandler.cpp

@@ -116,7 +116,22 @@ void DisassembleRequestHandler::operator()(
 
   const auto inst_count =
       GetInteger<int64_t>(arguments, "instructionCount").value_or(0);
-  lldb::SBInstructionList insts = dap.target.ReadInstructions(addr, inst_count);
+
+  std::string flavor_string{};
+  const auto target_triple = llvm::StringRef(dap.target.GetTriple());
+  if (target_triple.starts_with("x86_64") || target_triple.starts_with("x86")) {
+    const lldb::SBStructuredData flavor =
+        dap.debugger.GetSetting("target.x86-disassembly-flavor");
+
+    const size_t str_length = flavor.GetStringValue(nullptr, 0);
+    if (str_length != 0) {
+      flavor_string.resize(str_length + 1);
+      flavor.GetStringValue(flavor_string.data(), flavor_string.length());
+    }
+  }
+
+  lldb::SBInstructionList insts =
+      dap.target.ReadInstructions(addr, inst_count, flavor_string.c_str());
 
   if (!insts.IsValid()) {
     response["success"] = false;