[Lldb-commits] [lldb] [lldb] Add QSupported key to report watchpoint types supported (PR #80376)

[David Spickett via lldb-commits]

================
@@ -38,7 +38,44 @@ read packet: +
 read packet: $OK#9a
 send packet: +
 
+//----------------------------------------------------------------------
+// "QSupported"
+//
+// BRIEF
+//  Query the GDB remote server for features it supports
+//
+// PRIORITY TO IMPLEMENT
+//  Optional.
+//----------------------------------------------------------------------
 
+QSupported is a standard GDB Remote Serial Protocol packet, but
+there are several additions to the response that lldb can parse.
+An example exchange:
+
+send packet: qSupported:xmlRegisters=i386,arm,mips,arc;multiprocess+;fork-events+;vfork-events+
+
+read packet: qXfer:features:read+;PacketSize=20000;qEcho+;native-signals+;SupportedCompressions=lzfse,zlib-deflate,lz4,lzma;SupportedWatchpointTypes =aarch64-mask,aarch64-bas;
+
+In this example, three lldb extensions are reported:
+  PacketSize=20000
+    The base16 maximum packet size that the GDB Remote Serial stub
----------------
DavidSpickett wrote:

"base 16"?

Also what is a serial stub? Does that literally mean when we use a serial port to talk to the debug server?

https://github.com/llvm/llvm-project/pull/80376