[Lldb-commits] [lldb] [lldb][lldb-server][Darwin] Error when gdbserver mode is requested (PR #199654)

[David Spickett via lldb-commits]

https://github.com/DavidSpickett created https://github.com/llvm/llvm-project/pull/199654

Fixes #199035

lldb-server's platform mode works on Apple platforms but the gdbserver mode does not. Users should use debugserver instead, and platform mode knows to spawn debugserver instead of lldb-server.

I'm adding an error to state this, because until now it would maybe appear to work, or crash in strange ways. None of which can be fixed by a user and are a waste of our time dealing with the bug reports.

>From 87b7cc7f48089d97da2940600d80d8fb5732819f Mon Sep 17 00:00:00 2001
From: David Spickett <david.spickett at arm.com>
Date: Tue, 26 May 2026 10:43:07 +0000
Subject: [PATCH] [lldb][lldb-server][Darwin] Error when gdbserver mode is
 requested

Fixes #199035

lldb-server's platform mode works on Apple platforms but the gdbserver
mode does not. Users should use debugserver instead, and platform
mode knows to spawn debugserver instead of lldb-server.

I'm adding an error to state this, because until now it would maybe
appear to work, or crash in strange ways. None of which can be fixed
by a user and are a waste of our time dealing with the bug reports.
---
 lldb/tools/lldb-server/lldb-server.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lldb/tools/lldb-server/lldb-server.cpp b/lldb/tools/lldb-server/lldb-server.cpp
index 62255c708eac0..747f44f16ce29 100644
--- a/lldb/tools/lldb-server/lldb-server.cpp
+++ b/lldb/tools/lldb-server/lldb-server.cpp
@@ -61,9 +61,15 @@ int main(int argc, char *argv[]) {
 
   switch (argv[1][0]) {
   case 'g': {
+#if defined(__APPLE__)
+    fprintf(stderr, "gdbserver mode is not supported on Apple platforms. "
+                    "Use debugserver instead.");
+    return EXIT_FAILURE;
+#else
     llgs::Initialize();
     auto terminate = llvm::scope_exit([]() { llgs::Terminate(); });
     return main_gdbserver(argc, argv);
+#endif
   }
   case 'p': {
     llgs::Initialize();