[lldb][docs] Document qWatchpointSupportInfo

[DavidSpickett]

No description provided.

[llvmbot]

@llvm/pr-subscribers-lldb

Author: David Spickett (DavidSpickett)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/145709.diff

1 Files Affected:

• (modified) lldb/docs/resources/lldbgdbremote.md (+17)

diff --git a/lldb/docs/resources/lldbgdbremote.md b/lldb/docs/resources/lldbgdbremote.md
index 162815148a18b..80c68091ecd07 100644
--- a/lldb/docs/resources/lldbgdbremote.md
+++ b/lldb/docs/resources/lldbgdbremote.md
@@ -1998,6 +1998,23 @@ threads (live system debug) / cores (JTAG) in your program have
 stopped and allows LLDB to display and control your program
 correctly.
 
+## qWatchpointSupportInfo
+
+Get the number of hardware watchpoints available on the remote target.
+
+```
+send packet: $qWatchpointSupportInfo:#55
+read packet: $num:4;#f9
+```
+
+`num` is the number of hardware breakpoints, it will be `0` if none are
+available.
+
+**Priority to Implement:** Low. If this packet is not supported, LLDB will assume
+that hardware breakpoints are supported. If that is not the case, LLDB assumes
+that the debug stub will respond with an error when asked to set a hardware
+watchpoint.
+
 ## Stop reply packet extensions
 
 This section describes some of the additional information you can

[DavidSpickett]

As far as I can tell this is only used as a binary to tell if we have any hardware breakpoints, or none. Even though the packet returns the exact number.

[jasonmolenda]

LGTM.