fixup pending hooks in interrupt handlers

Author: lacraig2

pyplugins/apis/kffi.py

@@ -605,8 +605,10 @@ def _tramp_interrupt_handler(self):
         """
         if not hasattr(self, '_pending_tramp_callbacks') or not self._pending_tramp_callbacks:
             return False
-        while self._pending_tramp_callbacks:
-            func = self._pending_tramp_callbacks.pop(0)
+        pending_tramp_callbacks = self._pending_tramp_callbacks[:]
+        self._pending_tramp_callbacks = []
+        while pending_tramp_callbacks:
+            func = pending_tramp_callbacks.pop(0)
             tramp_info = yield from self.generate_trampoline()
             tramp_id = tramp_info.get("tramp_id")
             tramp_addr = tramp_info.get("tramp_addr")

pyplugins/apis/syscalls.py

@@ -457,6 +457,7 @@ def _syscall_interrupt_handler(self) -> bool:
             return False
 
         pending_hooks = self._pending_hooks[:]
+        self._pending_hooks = []
         while pending_hooks:
             # Take one item from the queue
             hook_config, func = pending_hooks.pop(0)

pyplugins/apis/uprobes.py

@@ -139,6 +139,7 @@ def _uprobe_interrupt_handler(self) -> bool:
             return False
 
         pending_uprobes = self._pending_uprobes[:]
+        self._pending_uprobes = []
 
         while pending_uprobes:
             uprobe_config, func = pending_uprobes.pop(0)