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

[Jason Molenda 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
----------------
jasonmolenda wrote:

(incidentally debugserver also reports a compression minimum size -- which I'll be removing after this patch is landed because it does nothing -- and that number is sent as a base 10 number.  lol it's a wild west for numbers.)

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