[Lldb-commits] [lldb] [lldb] Add specific error message for "process plugin" with no plugin loaded (PR #196933)

[David Spickett via lldb-commits]

https://github.com/DavidSpickett created https://github.com/llvm/llvm-project/pull/196933

Fixes #196535.

The error was:
> command is not implemented

Which is incorrect. It is now:
> no process plugin commands are currently registered

Which is not very helpful either but it's not wrong at least. We could expand it but I'm not sure what would help anyone here, given how rare it is that anyone encounters this anyway.

>From cbbdfefeca07ce854b282cbe725ee92af6783d7c Mon Sep 17 00:00:00 2001
From: David Spickett <david.spickett at arm.com>
Date: Fri, 8 May 2026 16:03:09 +0000
Subject: [PATCH] [lldb] Add specific error message for "process plugin" with
 no plugin loaded

Fixes #196535.

The error was:
> command is not implemented

Which is incorrect. It is now:
> no process plugin commands are currently registered

Which is not very helpful either but it's not wrong at least.

I don't think it's worth expanding it given how few people
will ever see this error message anyway.
---
 lldb/source/Commands/CommandObjectProcess.cpp                 | 4 ++++
 .../test/Shell/Commands/command-process-plugin-no-plugin.test | 3 +++
 2 files changed, 7 insertions(+)
 create mode 100644 lldb/test/Shell/Commands/command-process-plugin-no-plugin.test

diff --git a/lldb/source/Commands/CommandObjectProcess.cpp b/lldb/source/Commands/CommandObjectProcess.cpp
index 551f98566a9a5..390a3340d4990 100644
--- a/lldb/source/Commands/CommandObjectProcess.cpp
+++ b/lldb/source/Commands/CommandObjectProcess.cpp
@@ -952,6 +952,10 @@ class CommandObjectProcessPlugin : public CommandObjectProxy {
       return process->GetPluginCommandObject();
     return nullptr;
   }
+
+  llvm::StringRef GetUnsupportedError() override {
+    return "no process plugin commands are currently registered";
+  }
 };
 
 // CommandObjectProcessLoad
diff --git a/lldb/test/Shell/Commands/command-process-plugin-no-plugin.test b/lldb/test/Shell/Commands/command-process-plugin-no-plugin.test
new file mode 100644
index 0000000000000..b582bda04954a
--- /dev/null
+++ b/lldb/test/Shell/Commands/command-process-plugin-no-plugin.test
@@ -0,0 +1,3 @@
+# RUN: not %lldb -b -o "process plugin" 2>&1 | FileCheck %s
+
+# CHECK: error: no process plugin commands are currently registered