Update winedbg GDB proxy support

The GDB proxy now seems to work again, but only in remote sessions.

README.md

@@ -639,20 +639,20 @@ within loaded VST plugin itself.
 
 ### Attaching a debugger
 
-When needed, I found the easiest way to debug the plugin to be to load it in an
-instance of Carla with gdb attached:
-
-```shell
-env YABRIDGE_DEBUG_FILE=/tmp/yabridge.log YABRIDGE_DEBUG_LEVEL=2 carla --gdb
-```
-
-Doing the same thing for the Wine VST host can be a bit tricky. You'll need to
-launch winedbg in a seperate detached terminal emulator so it doesn't terminate
-together with the plugin, and winedbg can be a bit picky about the arguments it
-accepts. I've already set this up behind a feature flag for use in KDE Plasma.
-Other desktop environments and window managers will require some slight
-modifications in `src/plugin/host-process.cpp`. To enable this, simply run:
+To debug the plugin you can just attach gdb to the host as long as any
+sandboxing or out of process hosting is disabled (or you'll have to wrap around
+that host process). Debugging the Wine plugin host is a bit more difficult. Wine
+comes with a GDB proxy for winedbg, but it requires a little bit of additional
+setup and it doesn't support arguments containing spaces. To make this a bit
+easier, yabridge includes winedbg support behind a build option. You can enable
+this using:
 
 ```shell
 meson configure build --buildtype=debug -Dwith-winedbg=true
 ```
+
+Currently winedbg's normal GDB proxy is broken, so this option will start a
+remote GDB server that you have to connect to. You can use `gdb build/yabridge-host.exe.so` to start GDB, and then use the GDB `target` command
+printed to STDERR or `$YABRIDGE_DEBUG_FILE` to start the debugging session. Note
+that plugin names with spaces in the actual `.dll` or `.vst3` file name will
+have to be renamed first for this appraoch to work.

src/plugin/host-process.cpp

@@ -41,11 +41,10 @@ template <typename... Args>
 bp::child launch_host(fs::path host_path, Args&&... args) {
     return bp::child(
 #ifdef WITH_WINEDBG
-        // This is set up for KDE Plasma. Other desktop environments and
-        // window managers require some slight modifications to spawn a
-        // detached terminal emulator.
-        "/usr/bin/kstart5", "konsole", "--", "-e", "winedbg", "--gdb",
-        host_path.string() + ".so",
+        // Use the terminal output or `$YABRIDGE_DEBUG_LOG` to get yabridge's
+        // output, and use the printed target command in a GDB session where you
+        // load the yabridge `.so` file you're trying to debug
+        "/usr/bin/winedbg", "--gdb", "--no-start", host_path.string() + ".so",
 #else
         host_path,
 #endif