Get error: "failed to get reply to handshake packet" when running app in lldb

Development LLDB
1

Hi @Adrian_Prantl , sorry to bother you, I built the lldb using tag swift-5.6.1-RELEASE, but when I launch lldb I built, and using process launch to run the app, I get the error says "failed to get reply to handshake packet". If I use the system lldb, every thing is OK, could you please help me to solve this problem, Thanks.

My computer is M1 Max, and using Xcode 13.2.

2

Can you launch lldb with -O log enable gdb-remote packets? Then we can see what the communication looks like.

3

Appreciate your reply, and I enabled the log, and got this output:

(lldb) file /Users/rayxia/Library/Developer/Xcode/DerivedData/Noto-atxyvfvvbgknvneknpmititotyln/Build/Products/Debug/Noto.app
Current executable set to '/Users/rayxia/Library/Developer/Xcode/DerivedData/Noto-atxyvfvvbgknvneknpmititotyln/Build/Products/Debug/Noto.app' (arm64).
(lldb) r
 <   1> send packet: +
 history[1] tid=0x0103 <   1> send packet: +
 <  19> send packet: $QStartNoAckMode#b0
error: failed to get reply to handshake packet
4

Almost looks like the debug server doesn't even get launched. Can you confirm whether it gets spawned?

5

There is no debug server, but I confirm that there is no debug server when I use system lldb.
And I also tried to use Xcode to debug the APP, there is no lldb process, but lldb-rpc-server.

By the way, the APP I debug is a mac APP.