chore(gdb): add gdb cmd for nuttx drivers to support multi-instance (#9068)

Signed-off-by: rongyichang <rongyichang@xiaomi.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

scripts/gdb/lvglgdb/cmds/__init__.py

@@ -5,6 +5,7 @@ from .display import DumpDisplayBuf
 from .draw import InfoDrawUnit
 from .misc import InfoStyle
 from .debugger import Debugger
+from .drivers import Lvglobal
 
 __all__ = []
 
@@ -25,3 +26,6 @@ DumpDisplayBuf()
 # Infos
 InfoStyle()
 InfoDrawUnit()
+
+# Drivers
+Lvglobal()

scripts/gdb/lvglgdb/cmds/drivers/__init__.py

@@ -0,0 +1,5 @@
+from .nuttx import Lvglobal
+
+__all__ = [
+    "Lvglobal",
+]

scripts/gdb/lvglgdb/cmds/drivers/nuttx/__init__.py

@@ -0,0 +1,5 @@
+from .nuttx import Lvglobal
+
+__all__ = [
+    "Lvglobal",
+]

scripts/gdb/lvglgdb/cmds/drivers/nuttx/nuttx.py

@@ -0,0 +1,55 @@
+# GDB script to get lvgl global pointer in NuttX.
+
+import argparse
+import sys
+
+import gdb
+
+
+class Lvglobal(gdb.Command):
+    """Set which lvgl instance to inspect by finding lv_global pointer in task TLS data."""
+
+    def __init__(self):
+        super(Lvglobal, self).__init__("lvglobal", gdb.COMMAND_USER)
+
+    def set_lvgl_instance(self, inst):
+        from lvglgdb.lvgl import curr_inst
+
+        curr_inst().reset()
+        curr_inst().ensure_init(inst)
+
+    def invoke(self, arg, from_tty):
+        parser = argparse.ArgumentParser(description=self.__doc__)
+        parser.add_argument("-p", "--pid", type=int, help="Optional process ID")
+        try:
+            args = parser.parse_args(gdb.string_to_argv(arg))
+        except SystemExit:
+            return
+        try:
+            from nxgdb import utils
+        except ImportError:
+            print("nxgdb is not installed, can't find lvgl global pointer.")
+            return
+
+        lv_global = utils.gdb_eval_or_none("lv_global")
+        if lv_global:
+            print(f"Found single instance lv_global@{hex(lv_global.address)}")
+            self.set_lvgl_instance(lv_global)
+            return
+
+        # find the lvgl global pointer in tls
+        if not args.pid:
+            print("LVGL is in multi-process mode; please provide --pid.")
+            return
+        lv_key = utils.gdb_eval_or_none("lv_nuttx_tlskey")
+        if lv_key is None:
+            lv_key = utils.gdb_eval_or_none("lv_global_default::index")
+        if lv_key is None:
+            print("Can't find lvgl tls key in multi-process mode.")
+            return
+        lv_global = utils.get_task_tls(args.pid, lv_key)
+        if lv_global:
+            print(f"Found lv_global@{hex(lv_global)}")
+            self.set_lvgl_instance(lv_global)
+        else:
+            print(f"\nCan't find lv_global with tlskey@{hex(lv_key)}.")

scripts/gdb/lvglgdb/lvgl/core/lv_global.py

@@ -76,7 +76,7 @@ class _LVGLSingleton:
                 print(f"Failed to get lv_global: {e}")
                 return False
         elif not isinstance(lv_global, Value):
-            lv_global = Value(lv_global)
+            lv_global = Value(lv_global).cast("lv_global_t", ptr=True)
 
         if not lv_global.inited:
             print(