rtos: Add hint for zephyr’s Thread Info configuration

This should allow for easier discoverability of that parameter.

Author: ithinuel

pyocd/rtos/provider.py

@@ -53,14 +53,15 @@ def __init__(self, target):
         self._last_run_token = -1
         self._read_from_target = False
 
-    def _lookup_symbols(self, symbolList, symbolProvider):
+    def _lookup_symbols(self, symbolList, symbolProvider, allowPartial = False):
         syms = {}
         for name in symbolList:
             addr = symbolProvider.get_symbol_value(name)
             LOG.debug("Value for symbol %s = %s", name, hex(addr) if addr is not None else "<none>")
-            if addr is None:
+            if addr is not None:
+                syms[name] = addr
+            elif not allowPartial:
                 return None
-            syms[name] = addr
         return syms
 
     def init(self, symbolProvider):

pyocd/rtos/zephyr.py

@@ -274,9 +274,13 @@ def __init__(self, target):
 
     def init(self, symbolProvider):
         # Lookup required symbols.
-        self._symbols = self._lookup_symbols(self.ZEPHYR_SYMBOLS, symbolProvider)
+        self._symbols = self._lookup_symbols(self.ZEPHYR_SYMBOLS, symbolProvider, True)
         if self._symbols is None:
             return False
+        if len(self._symbols) != len(self.ZEPHYR_SYMBOLS):
+            LOG.warning("Zephyr kernel detected. Build your Zephyr application with `CONFIG_DEBUG_THREAD_INFO=y` to " +
+                        "enable thread awareness.")
+            return False
 
         self._update()
         self._target.session.subscribe(self.event_handler, Target.Event.POST_FLASH_PROGRAM)